hpsa.c 234.3 KB
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/*
 *    Disk Array driver for HP Smart Array SAS controllers
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 *    Copyright 2000, 2014 Hewlett-Packard Development Company, L.P.
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 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; version 2 of the License.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
 *
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
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#include <linux/pci-aspm.h>
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#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <linux/blktrace_api.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/completion.h>
#include <linux/moduleparam.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_eh.h>
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#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
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#include <linux/atomic.h>
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#include <linux/jiffies.h>
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#include <linux/percpu-defs.h>
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#include <linux/percpu.h>
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#include <asm/unaligned.h>
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#include <asm/div64.h>
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#include "hpsa_cmd.h"
#include "hpsa.h"

/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
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#define HPSA_DRIVER_VERSION "3.4.4-1"
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#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
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#define HPSA "hpsa"
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/* How long to wait for CISS doorbell communication */
#define CLEAR_EVENT_WAIT_INTERVAL 20	/* ms for each msleep() call */
#define MODE_CHANGE_WAIT_INTERVAL 10	/* ms for each msleep() call */
#define MAX_CLEAR_EVENT_WAIT 30000	/* times 20 ms = 600 s */
#define MAX_MODE_CHANGE_WAIT 2000	/* times 10 ms = 20 s */
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#define MAX_IOCTL_CONFIG_WAIT 1000

/*define how many times we will try a command because of bus resets */
#define MAX_CMD_RETRIES 3

/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
	HPSA_DRIVER_VERSION);
MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
MODULE_VERSION(HPSA_DRIVER_VERSION);
MODULE_LICENSE("GPL");

static int hpsa_allow_any;
module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_allow_any,
		"Allow hpsa driver to access unknown HP Smart Array hardware");
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static int hpsa_simple_mode;
module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hpsa_simple_mode,
	"Use 'simple mode' rather than 'performant mode'");
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/* define the PCI info for the cards we can control */
static const struct pci_device_id hpsa_pci_device_id[] = {
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
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	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
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	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
	{PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
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	{PCI_VENDOR_ID_HP,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
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		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
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	{0,}
};

MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);

/*  board_id = Subsystem Device ID & Vendor ID
 *  product = Marketing Name for the board
 *  access = Address of the struct of function pointers
 */
static struct board_type products[] = {
	{0x3241103C, "Smart Array P212", &SA5_access},
	{0x3243103C, "Smart Array P410", &SA5_access},
	{0x3245103C, "Smart Array P410i", &SA5_access},
	{0x3247103C, "Smart Array P411", &SA5_access},
	{0x3249103C, "Smart Array P812", &SA5_access},
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	{0x324A103C, "Smart Array P712m", &SA5_access},
	{0x324B103C, "Smart Array P711m", &SA5_access},
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	{0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
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	{0x3350103C, "Smart Array P222", &SA5_access},
	{0x3351103C, "Smart Array P420", &SA5_access},
	{0x3352103C, "Smart Array P421", &SA5_access},
	{0x3353103C, "Smart Array P822", &SA5_access},
	{0x3354103C, "Smart Array P420i", &SA5_access},
	{0x3355103C, "Smart Array P220i", &SA5_access},
	{0x3356103C, "Smart Array P721m", &SA5_access},
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	{0x1921103C, "Smart Array P830i", &SA5_access},
	{0x1922103C, "Smart Array P430", &SA5_access},
	{0x1923103C, "Smart Array P431", &SA5_access},
	{0x1924103C, "Smart Array P830", &SA5_access},
	{0x1926103C, "Smart Array P731m", &SA5_access},
	{0x1928103C, "Smart Array P230i", &SA5_access},
	{0x1929103C, "Smart Array P530", &SA5_access},
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	{0x21BD103C, "Smart Array P244br", &SA5_access},
	{0x21BE103C, "Smart Array P741m", &SA5_access},
	{0x21BF103C, "Smart HBA H240ar", &SA5_access},
	{0x21C0103C, "Smart Array P440ar", &SA5_access},
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	{0x21C1103C, "Smart Array P840ar", &SA5_access},
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	{0x21C2103C, "Smart Array P440", &SA5_access},
	{0x21C3103C, "Smart Array P441", &SA5_access},
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	{0x21C4103C, "Smart Array", &SA5_access},
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	{0x21C5103C, "Smart Array P841", &SA5_access},
	{0x21C6103C, "Smart HBA H244br", &SA5_access},
	{0x21C7103C, "Smart HBA H240", &SA5_access},
	{0x21C8103C, "Smart HBA H241", &SA5_access},
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	{0x21C9103C, "Smart Array", &SA5_access},
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	{0x21CA103C, "Smart Array P246br", &SA5_access},
	{0x21CB103C, "Smart Array P840", &SA5_access},
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	{0x21CC103C, "Smart Array", &SA5_access},
	{0x21CD103C, "Smart Array", &SA5_access},
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	{0x21CE103C, "Smart HBA", &SA5_access},
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	{0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
	{0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
	{0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
	{0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
	{0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
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	{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};

static int number_of_controllers;

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static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
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static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
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#ifdef CONFIG_COMPAT
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static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
	void __user *arg);
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#endif

static void cmd_free(struct ctlr_info *h, struct CommandList *c);
static struct CommandList *cmd_alloc(struct ctlr_info *h);
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static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
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	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
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	int cmd_type);
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static void hpsa_free_cmd_pool(struct ctlr_info *h);
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#define VPD_PAGE (1 << 8)
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static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
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static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time);
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static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
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static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
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static int hpsa_slave_alloc(struct scsi_device *sdev);
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static int hpsa_slave_configure(struct scsi_device *sdev);
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static void hpsa_slave_destroy(struct scsi_device *sdev);

static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno);
static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
static void check_ioctl_unit_attention(struct ctlr_info *h,
	struct CommandList *c);
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/* performant mode helper functions */
static void calc_bucket_map(int *bucket, int num_buckets,
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	int nsgs, int min_blocks, u32 *bucket_map);
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static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
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static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h);
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h);
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static inline u32 next_command(struct ctlr_info *h, u8 q);
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static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset);
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar);
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready);
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static inline void finish_cmd(struct CommandList *c);
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static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
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#define BOARD_NOT_READY 0
#define BOARD_READY 1
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static void hpsa_drain_accel_commands(struct ctlr_info *h);
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static void hpsa_flush_cache(struct ctlr_info *h);
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static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
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	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
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static void hpsa_command_resubmit_worker(struct work_struct *work);
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static u32 lockup_detected(struct ctlr_info *h);
static int detect_controller_lockup(struct ctlr_info *h);
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static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
{
	unsigned long *priv = shost_priv(sdev->host);
	return (struct ctlr_info *) *priv;
}

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static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
{
	unsigned long *priv = shost_priv(sh);
	return (struct ctlr_info *) *priv;
}

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/* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
static void decode_sense_data(const u8 *sense_data, int sense_data_len,
			u8 *sense_key, u8 *asc, u8 *ascq)
{
	struct scsi_sense_hdr sshdr;
	bool rc;

	*sense_key = -1;
	*asc = -1;
	*ascq = -1;

	if (sense_data_len < 1)
		return;

	rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
	if (rc) {
		*sense_key = sshdr.sense_key;
		*asc = sshdr.asc;
		*ascq = sshdr.ascq;
	}
}

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static int check_for_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
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	u8 sense_key, asc, ascq;
	int sense_len;

	if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
		sense_len = sizeof(c->err_info->SenseInfo);
	else
		sense_len = c->err_info->SenseLen;

	decode_sense_data(c->err_info->SenseInfo, sense_len,
				&sense_key, &asc, &ascq);
	if (sense_key != UNIT_ATTENTION || asc == -1)
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		return 0;

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	switch (asc) {
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	case STATE_CHANGED:
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		dev_warn(&h->pdev->dev,
			HPSA "%d: a state change detected, command retried\n",
			h->ctlr);
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		break;
	case LUN_FAILED:
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		dev_warn(&h->pdev->dev,
			HPSA "%d: LUN failure detected\n", h->ctlr);
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		break;
	case REPORT_LUNS_CHANGED:
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		dev_warn(&h->pdev->dev,
			HPSA "%d: report LUN data changed\n", h->ctlr);
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	/*
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	 * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
	 * target (array) devices.
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	 */
		break;
	case POWER_OR_RESET:
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		dev_warn(&h->pdev->dev, HPSA "%d: a power on "
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			"or device reset detected\n", h->ctlr);
		break;
	case UNIT_ATTENTION_CLEARED:
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		dev_warn(&h->pdev->dev, HPSA "%d: unit attention "
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		    "cleared by another initiator\n", h->ctlr);
		break;
	default:
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		dev_warn(&h->pdev->dev, HPSA "%d: unknown "
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			"unit attention detected\n", h->ctlr);
		break;
	}
	return 1;
}

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static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
{
	if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
		(c->err_info->ScsiStatus != SAM_STAT_BUSY &&
		 c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
		return 0;
	dev_warn(&h->pdev->dev, HPSA "device busy");
	return 1;
}

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static u32 lockup_detected(struct ctlr_info *h);
static ssize_t host_show_lockup_detected(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int ld;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	ld = lockup_detected(h);

	return sprintf(buf, "ld=%d\n", ld);
}

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static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int status, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &status) != 1)
		return -EINVAL;
	h = shost_to_hba(shost);
	h->acciopath_status = !!status;
	dev_warn(&h->pdev->dev,
		"hpsa: HP SSD Smart Path %s via sysfs update.\n",
		h->acciopath_status ? "enabled" : "disabled");
	return count;
}

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static ssize_t host_store_raid_offload_debug(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	int debug_level, len;
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	char tmpbuf[10];

	if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
		return -EACCES;
	len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
	strncpy(tmpbuf, buf, len);
	tmpbuf[len] = '\0';
	if (sscanf(tmpbuf, "%d", &debug_level) != 1)
		return -EINVAL;
	if (debug_level < 0)
		debug_level = 0;
	h = shost_to_hba(shost);
	h->raid_offload_debug = debug_level;
	dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
		h->raid_offload_debug);
	return count;
}

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static ssize_t host_store_rescan(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
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	h = shost_to_hba(shost);
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	hpsa_scan_start(h->scsi_host);
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	return count;
}

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static ssize_t host_show_firmware_revision(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);
	unsigned char *fwrev;

	h = shost_to_hba(shost);
	if (!h->hba_inquiry_data)
		return 0;
	fwrev = &h->hba_inquiry_data[32];
	return snprintf(buf, 20, "%c%c%c%c\n",
		fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
}

445 446 447 448 449 450
static ssize_t host_show_commands_outstanding(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct ctlr_info *h = shost_to_hba(shost);

451 452
	return snprintf(buf, 20, "%d\n",
			atomic_read(&h->commands_outstanding));
453 454
}

455 456 457 458 459 460 461 462
static ssize_t host_show_transport_mode(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 20, "%s\n",
463
		h->transMethod & CFGTBL_Trans_Performant ?
464 465 466
			"performant" : "simple");
}

467 468 469 470 471 472 473 474 475 476 477
static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
	return snprintf(buf, 30, "HP SSD Smart Path %s\n",
		(h->acciopath_status == 1) ?  "enabled" : "disabled");
}

478
/* List of controllers which cannot be hard reset on kexec with reset_devices */
479 480
static u32 unresettable_controller[] = {
	0x324a103C, /* Smart Array P712m */
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	0x324b103C, /* Smart Array P711m */
482 483 484 485 486 487 488 489 490 491
	0x3223103C, /* Smart Array P800 */
	0x3234103C, /* Smart Array P400 */
	0x3235103C, /* Smart Array P400i */
	0x3211103C, /* Smart Array E200i */
	0x3212103C, /* Smart Array E200 */
	0x3213103C, /* Smart Array E200i */
	0x3214103C, /* Smart Array E200i */
	0x3215103C, /* Smart Array E200i */
	0x3237103C, /* Smart Array E500 */
	0x323D103C, /* Smart Array P700m */
492
	0x40800E11, /* Smart Array 5i */
493 494
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
495 496 497 498 499 500
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
501 502
};

503 504
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
505
	0x40800E11, /* Smart Array 5i */
506 507 508 509 510 511
	0x40700E11, /* Smart Array 5300 */
	0x40820E11, /* Smart Array 532 */
	0x40830E11, /* Smart Array 5312 */
	0x409A0E11, /* Smart Array 641 */
	0x409B0E11, /* Smart Array 642 */
	0x40910E11, /* Smart Array 6i */
512 513 514 515 516 517 518 519 520 521 522
	/* Exclude 640x boards.  These are two pci devices in one slot
	 * which share a battery backed cache module.  One controls the
	 * cache, the other accesses the cache through the one that controls
	 * it.  If we reset the one controlling the cache, the other will
	 * likely not be happy.  Just forbid resetting this conjoined mess.
	 * The 640x isn't really supported by hpsa anyway.
	 */
	0x409C0E11, /* Smart Array 6400 */
	0x409D0E11, /* Smart Array 6400 EM */
};

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523 524 525 526 527 528 529
static u32 needs_abort_tags_swizzled[] = {
	0x323D103C, /* Smart Array P700m */
	0x324a103C, /* Smart Array P712m */
	0x324b103C, /* SmartArray P711m */
};

static int board_id_in_array(u32 a[], int nelems, u32 board_id)
530 531 532
{
	int i;

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533 534 535 536
	for (i = 0; i < nelems; i++)
		if (a[i] == board_id)
			return 1;
	return 0;
537 538
}

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539
static int ctlr_is_hard_resettable(u32 board_id)
540
{
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541 542 543
	return !board_id_in_array(unresettable_controller,
			ARRAY_SIZE(unresettable_controller), board_id);
}
544

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545 546 547 548
static int ctlr_is_soft_resettable(u32 board_id)
{
	return !board_id_in_array(soft_unresettable_controller,
			ARRAY_SIZE(soft_unresettable_controller), board_id);
549 550
}

551 552 553 554 555 556
static int ctlr_is_resettable(u32 board_id)
{
	return ctlr_is_hard_resettable(board_id) ||
		ctlr_is_soft_resettable(board_id);
}

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static int ctlr_needs_abort_tags_swizzled(u32 board_id)
{
	return board_id_in_array(needs_abort_tags_swizzled,
			ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
}

563 564 565 566 567 568 569
static ssize_t host_show_resettable(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct Scsi_Host *shost = class_to_shost(dev);

	h = shost_to_hba(shost);
570
	return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
571 572
}

573 574 575 576 577
static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
{
	return (scsi3addr[3] & 0xC0) == 0x40;
}

578 579
static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
	"1(+0)ADM", "UNKNOWN"
580
};
581 582 583 584 585 586 587
#define HPSA_RAID_0	0
#define HPSA_RAID_4	1
#define HPSA_RAID_1	2	/* also used for RAID 10 */
#define HPSA_RAID_5	3	/* also used for RAID 50 */
#define HPSA_RAID_51	4
#define HPSA_RAID_6	5	/* also used for RAID 60 */
#define HPSA_RAID_ADM	6	/* also used for RAID 1+0 ADM */
588 589 590 591 592 593
#define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1)

static ssize_t raid_level_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	ssize_t l = 0;
594
	unsigned char rlevel;
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}

	/* Is this even a logical drive? */
	if (!is_logical_dev_addr_mode(hdev->scsi3addr)) {
		spin_unlock_irqrestore(&h->lock, flags);
		l = snprintf(buf, PAGE_SIZE, "N/A\n");
		return l;
	}

	rlevel = hdev->raid_level;
	spin_unlock_irqrestore(&h->lock, flags);
618
	if (rlevel > RAID_UNKNOWN)
619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675
		rlevel = RAID_UNKNOWN;
	l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
	return l;
}

static ssize_t lunid_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char lunid[8];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		lunid[0], lunid[1], lunid[2], lunid[3],
		lunid[4], lunid[5], lunid[6], lunid[7]);
}

static ssize_t unique_id_show(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	unsigned char sn[16];

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	memcpy(sn, hdev->device_id, sizeof(sn));
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 16 * 2 + 2,
			"%02X%02X%02X%02X%02X%02X%02X%02X"
			"%02X%02X%02X%02X%02X%02X%02X%02X\n",
			sn[0], sn[1], sn[2], sn[3],
			sn[4], sn[5], sn[6], sn[7],
			sn[8], sn[9], sn[10], sn[11],
			sn[12], sn[13], sn[14], sn[15]);
}

676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
	     struct device_attribute *attr, char *buf)
{
	struct ctlr_info *h;
	struct scsi_device *sdev;
	struct hpsa_scsi_dev_t *hdev;
	unsigned long flags;
	int offload_enabled;

	sdev = to_scsi_device(dev);
	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->lock, flags);
	hdev = sdev->hostdata;
	if (!hdev) {
		spin_unlock_irqrestore(&h->lock, flags);
		return -ENODEV;
	}
	offload_enabled = hdev->offload_enabled;
	spin_unlock_irqrestore(&h->lock, flags);
	return snprintf(buf, 20, "%d\n", offload_enabled);
}

698 699 700 701
static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
702 703
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
			host_show_hp_ssd_smart_path_enabled, NULL);
704 705 706
static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
		host_show_hp_ssd_smart_path_status,
		host_store_hp_ssd_smart_path_status);
707 708
static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
			host_store_raid_offload_debug);
709 710 711 712 713 714
static DEVICE_ATTR(firmware_revision, S_IRUGO,
	host_show_firmware_revision, NULL);
static DEVICE_ATTR(commands_outstanding, S_IRUGO,
	host_show_commands_outstanding, NULL);
static DEVICE_ATTR(transport_mode, S_IRUGO,
	host_show_transport_mode, NULL);
715 716
static DEVICE_ATTR(resettable, S_IRUGO,
	host_show_resettable, NULL);
717 718
static DEVICE_ATTR(lockup_detected, S_IRUGO,
	host_show_lockup_detected, NULL);
719 720 721 722 723

static struct device_attribute *hpsa_sdev_attrs[] = {
	&dev_attr_raid_level,
	&dev_attr_lunid,
	&dev_attr_unique_id,
724
	&dev_attr_hp_ssd_smart_path_enabled,
725
	&dev_attr_lockup_detected,
726 727 728 729 730 731 732 733
	NULL,
};

static struct device_attribute *hpsa_shost_attrs[] = {
	&dev_attr_rescan,
	&dev_attr_firmware_revision,
	&dev_attr_commands_outstanding,
	&dev_attr_transport_mode,
734
	&dev_attr_resettable,
735
	&dev_attr_hp_ssd_smart_path_status,
736
	&dev_attr_raid_offload_debug,
737 738 739
	NULL,
};

740 741 742
#define HPSA_NRESERVED_CMDS	(HPSA_CMDS_RESERVED_FOR_ABORTS + \
		HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)

743 744
static struct scsi_host_template hpsa_driver_template = {
	.module			= THIS_MODULE,
745 746
	.name			= HPSA,
	.proc_name		= HPSA,
747 748 749
	.queuecommand		= hpsa_scsi_queue_command,
	.scan_start		= hpsa_scan_start,
	.scan_finished		= hpsa_scan_finished,
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750
	.change_queue_depth	= hpsa_change_queue_depth,
751 752
	.this_id		= -1,
	.use_clustering		= ENABLE_CLUSTERING,
753
	.eh_abort_handler	= hpsa_eh_abort_handler,
754 755 756
	.eh_device_reset_handler = hpsa_eh_device_reset_handler,
	.ioctl			= hpsa_ioctl,
	.slave_alloc		= hpsa_slave_alloc,
757
	.slave_configure	= hpsa_slave_configure,
758 759 760 761 762 763
	.slave_destroy		= hpsa_slave_destroy,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= hpsa_compat_ioctl,
#endif
	.sdev_attrs = hpsa_sdev_attrs,
	.shost_attrs = hpsa_shost_attrs,
764
	.max_sectors = 8192,
765
	.no_write_same = 1,
766 767
};

768
static inline u32 next_command(struct ctlr_info *h, u8 q)
769 770
{
	u32 a;
771
	struct reply_queue_buffer *rq = &h->reply_queue[q];
772

773 774 775
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return h->access.command_completed(h, q);

776
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
777
		return h->access.command_completed(h, q);
778

779 780 781
	if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
		a = rq->head[rq->current_entry];
		rq->current_entry++;
782
		atomic_dec(&h->commands_outstanding);
783 784 785 786
	} else {
		a = FIFO_EMPTY;
	}
	/* Check for wraparound */
787 788 789
	if (rq->current_entry == h->max_commands) {
		rq->current_entry = 0;
		rq->wraparound ^= 1;
790 791 792 793
	}
	return a;
}

794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819
/*
 * There are some special bits in the bus address of the
 * command that we have to set for the controller to know
 * how to process the command:
 *
 * Normal performant mode:
 * bit 0: 1 means performant mode, 0 means simple mode.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 0)
 *
 * ioaccel1 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-3 = block fetch table entry
 * bits 4-6 = command type (== 110)
 * (command type is needed because ioaccel1 mode
 * commands are submitted through the same register as normal
 * mode commands, so this is how the controller knows whether
 * the command is normal mode or ioaccel1 mode.)
 *
 * ioaccel2 mode:
 * bit 0 = "performant mode" bit.
 * bits 1-4 = block fetch table entry (note extra bit)
 * bits 4-6 = not needed, because ioaccel2 mode has
 * a separate special register for submitting commands.
 */

820 821
/*
 * set_performant_mode: Modify the tag for cciss performant
822 823 824
 * set bit 0 for pull model, bits 3-1 for block fetch
 * register number
 */
825 826 827
#define DEFAULT_REPLY_QUEUE (-1)
static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
					int reply_queue)
828
{
829
	if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
830
		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
831 832 833
		if (unlikely(!h->msix_vector))
			return;
		if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
834
			c->Header.ReplyQueue =
835
				raw_smp_processor_id() % h->nreply_queues;
836 837
		else
			c->Header.ReplyQueue = reply_queue % h->nreply_queues;
838
	}
839 840
}

841
static void set_ioaccel1_performant_mode(struct ctlr_info *h,
842 843
						struct CommandList *c,
						int reply_queue)
844 845 846
{
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];

847 848
	/*
	 * Tell the controller to post the reply to the queue for this
849 850
	 * processor.  This seems to give the best I/O throughput.
	 */
851 852 853 854 855 856
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
	else
		cp->ReplyQueue = reply_queue % h->nreply_queues;
	/*
	 * Set the bits in the address sent down to include:
857 858 859 860 861 862 863 864 865
	 *  - performant mode bit (bit 0)
	 *  - pull count (bits 1-3)
	 *  - command type (bits 4-6)
	 */
	c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
					IOACCEL1_BUSADDR_CMDTYPE;
}

static void set_ioaccel2_performant_mode(struct ctlr_info *h,
866 867
						struct CommandList *c,
						int reply_queue)
868 869 870
{
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];

871 872
	/*
	 * Tell the controller to post the reply to the queue for this
873 874
	 * processor.  This seems to give the best I/O throughput.
	 */
875 876 877 878 879 880
	if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
		cp->reply_queue = smp_processor_id() % h->nreply_queues;
	else
		cp->reply_queue = reply_queue % h->nreply_queues;
	/*
	 * Set the bits in the address sent down to include:
881 882 883 884 885 886 887
	 *  - performant mode bit not used in ioaccel mode 2
	 *  - pull count (bits 0-3)
	 *  - command type isn't needed for ioaccel2
	 */
	c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
}

888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
static int is_firmware_flash_cmd(u8 *cdb)
{
	return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
}

/*
 * During firmware flash, the heartbeat register may not update as frequently
 * as it should.  So we dial down lockup detection during firmware flash. and
 * dial it back up when firmware flash completes.
 */
#define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
#define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
		struct CommandList *c)
{
	if (!is_firmware_flash_cmd(c->Request.CDB))
		return;
	atomic_inc(&h->firmware_flash_in_progress);
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
}

static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
		struct CommandList *c)
{
	if (is_firmware_flash_cmd(c->Request.CDB) &&
		atomic_dec_and_test(&h->firmware_flash_in_progress))
		h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
}

917 918
static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
	struct CommandList *c, int reply_queue)
919
{
920 921
	dial_down_lockup_detection_during_fw_flash(h, c);
	atomic_inc(&h->commands_outstanding);
922 923
	switch (c->cmd_type) {
	case CMD_IOACCEL1:
924
		set_ioaccel1_performant_mode(h, c, reply_queue);
925
		writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
926 927
		break;
	case CMD_IOACCEL2:
928
		set_ioaccel2_performant_mode(h, c, reply_queue);
929
		writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
930 931
		break;
	default:
932
		set_performant_mode(h, c, reply_queue);
933
		h->access.submit_command(h, c);
934
	}
935 936
}

937 938 939 940 941 942
static void enqueue_cmd_and_start_io(struct ctlr_info *h,
					struct CommandList *c)
{
	__enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
}

943 944 945 946 947 948 949 950 951 952 953 954 955 956
static inline int is_hba_lunid(unsigned char scsi3addr[])
{
	return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
}

static inline int is_scsi_rev_5(struct ctlr_info *h)
{
	if (!h->hba_inquiry_data)
		return 0;
	if ((h->hba_inquiry_data[2] & 0x07) == 5)
		return 1;
	return 0;
}

957 958 959 960 961 962 963
static int hpsa_find_target_lun(struct ctlr_info *h,
	unsigned char scsi3addr[], int bus, int *target, int *lun)
{
	/* finds an unused bus, target, lun for a new physical device
	 * assumes h->devlock is held
	 */
	int i, found = 0;
964
	DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
965

966
	bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
967 968 969

	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
970
			__set_bit(h->dev[i]->target, lun_taken);
971 972
	}

973 974 975 976 977 978
	i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
	if (i < HPSA_MAX_DEVICES) {
		/* *bus = 1; */
		*target = i;
		*lun = 0;
		found = 1;
979 980 981 982
	}
	return !found;
}

983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
static inline void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
	struct hpsa_scsi_dev_t *dev, char *description)
{
	dev_printk(level, &h->pdev->dev,
			"scsi %d:%d:%d:%d: %s %s %.8s %.16s RAID-%s SSDSmartPathCap%c En%c Exp=%d\n",
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
			description,
			scsi_device_type(dev->devtype),
			dev->vendor,
			dev->model,
			dev->raid_level > RAID_UNKNOWN ?
				"RAID-?" : raid_label[dev->raid_level],
			dev->offload_config ? '+' : '-',
			dev->offload_enabled ? '+' : '-',
			dev->expose_state);
}

1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
/* Add an entry into h->dev[] array. */
static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno,
		struct hpsa_scsi_dev_t *device,
		struct hpsa_scsi_dev_t *added[], int *nadded)
{
	/* assumes h->devlock is held */
	int n = h->ndevices;
	int i;
	unsigned char addr1[8], addr2[8];
	struct hpsa_scsi_dev_t *sd;

1011
	if (n >= HPSA_MAX_DEVICES) {
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
		dev_err(&h->pdev->dev, "too many devices, some will be "
			"inaccessible.\n");
		return -1;
	}

	/* physical devices do not have lun or target assigned until now. */
	if (device->lun != -1)
		/* Logical device, lun is already assigned. */
		goto lun_assigned;

	/* If this device a non-zero lun of a multi-lun device
	 * byte 4 of the 8-byte LUN addr will contain the logical
D
Don Brace 已提交
1024
	 * unit no, zero otherwise.
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	 */
	if (device->scsi3addr[4] == 0) {
		/* This is not a non-zero lun of a multi-lun device */
		if (hpsa_find_target_lun(h, device->scsi3addr,
			device->bus, &device->target, &device->lun) != 0)
			return -1;
		goto lun_assigned;
	}

	/* This is a non-zero lun of a multi-lun device.
	 * Search through our list and find the device which
	 * has the same 8 byte LUN address, excepting byte 4.
	 * Assign the same bus and target for this new LUN.
	 * Use the logical unit number from the firmware.
	 */
	memcpy(addr1, device->scsi3addr, 8);
	addr1[4] = 0;
	for (i = 0; i < n; i++) {
		sd = h->dev[i];
		memcpy(addr2, sd->scsi3addr, 8);
		addr2[4] = 0;
		/* differ only in byte 4? */
		if (memcmp(addr1, addr2, 8) == 0) {
			device->bus = sd->bus;
			device->target = sd->target;
			device->lun = device->scsi3addr[4];
			break;
		}
	}
	if (device->lun == -1) {
		dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
			" suspect firmware bug or unsupported hardware "
			"configuration.\n");
			return -1;
	}

lun_assigned:

	h->dev[n] = device;
	h->ndevices++;
	added[*nadded] = device;
	(*nadded)++;
1067 1068
	hpsa_show_dev_msg(KERN_INFO, h, device,
		device->expose_state & HPSA_SCSI_ADD ? "added" : "masked");
1069 1070
	device->offload_to_be_enabled = device->offload_enabled;
	device->offload_enabled = 0;
1071 1072 1073
	return 0;
}

1074 1075 1076 1077
/* Update an entry in h->dev[] array. */
static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno,
	int entry, struct hpsa_scsi_dev_t *new_entry)
{
1078
	int offload_enabled;
1079 1080 1081 1082 1083
	/* assumes h->devlock is held */
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);

	/* Raid level changed. */
	h->dev[entry]->raid_level = new_entry->raid_level;
1084

1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
	/* Raid offload parameters changed.  Careful about the ordering. */
	if (new_entry->offload_config && new_entry->offload_enabled) {
		/*
		 * if drive is newly offload_enabled, we want to copy the
		 * raid map data first.  If previously offload_enabled and
		 * offload_config were set, raid map data had better be
		 * the same as it was before.  if raid map data is changed
		 * then it had better be the case that
		 * h->dev[entry]->offload_enabled is currently 0.
		 */
		h->dev[entry]->raid_map = new_entry->raid_map;
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
	}
1098 1099 1100 1101 1102
	if (new_entry->hba_ioaccel_enabled) {
		h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
		wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
	}
	h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1103
	h->dev[entry]->offload_config = new_entry->offload_config;
1104
	h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1105
	h->dev[entry]->queue_depth = new_entry->queue_depth;
1106

1107 1108 1109 1110 1111 1112 1113 1114 1115
	/*
	 * We can turn off ioaccel offload now, but need to delay turning
	 * it on until we can update h->dev[entry]->phys_disk[], but we
	 * can't do that until all the devices are updated.
	 */
	h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
	if (!new_entry->offload_enabled)
		h->dev[entry]->offload_enabled = 0;

1116 1117
	offload_enabled = h->dev[entry]->offload_enabled;
	h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
1118
	hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1119
	h->dev[entry]->offload_enabled = offload_enabled;
1120 1121
}

1122 1123 1124 1125 1126 1127 1128
/* Replace an entry from h->dev[] array. */
static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno,
	int entry, struct hpsa_scsi_dev_t *new_entry,
	struct hpsa_scsi_dev_t *added[], int *nadded,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
1129
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1130 1131
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141

	/*
	 * New physical devices won't have target/lun assigned yet
	 * so we need to preserve the values in the slot we are replacing.
	 */
	if (new_entry->target == -1) {
		new_entry->target = h->dev[entry]->target;
		new_entry->lun = h->dev[entry]->lun;
	}

1142 1143 1144
	h->dev[entry] = new_entry;
	added[*nadded] = new_entry;
	(*nadded)++;
1145
	hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1146 1147
	new_entry->offload_to_be_enabled = new_entry->offload_enabled;
	new_entry->offload_enabled = 0;
1148 1149
}

1150 1151 1152 1153 1154 1155 1156 1157
/* Remove an entry from h->dev[] array. */
static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry,
	struct hpsa_scsi_dev_t *removed[], int *nremoved)
{
	/* assumes h->devlock is held */
	int i;
	struct hpsa_scsi_dev_t *sd;

1158
	BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1159 1160 1161 1162 1163 1164 1165 1166

	sd = h->dev[entry];
	removed[*nremoved] = h->dev[entry];
	(*nremoved)++;

	for (i = entry; i < h->ndevices-1; i++)
		h->dev[i] = h->dev[i+1];
	h->ndevices--;
1167
	hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
}

#define SCSI3ADDR_EQ(a, b) ( \
	(a)[7] == (b)[7] && \
	(a)[6] == (b)[6] && \
	(a)[5] == (b)[5] && \
	(a)[4] == (b)[4] && \
	(a)[3] == (b)[3] && \
	(a)[2] == (b)[2] && \
	(a)[1] == (b)[1] && \
	(a)[0] == (b)[0])

static void fixup_botched_add(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *added)
{
	/* called when scsi_add_device fails in order to re-adjust
	 * h->dev[] to match the mid layer's view.
	 */
	unsigned long flags;
	int i, j;

	spin_lock_irqsave(&h->lock, flags);
	for (i = 0; i < h->ndevices; i++) {
		if (h->dev[i] == added) {
			for (j = i; j < h->ndevices-1; j++)
				h->dev[j] = h->dev[j+1];
			h->ndevices--;
			break;
		}
	}
	spin_unlock_irqrestore(&h->lock, flags);
	kfree(added);
}

static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* we compare everything except lun and target as these
	 * are not yet assigned.  Compare parts likely
	 * to differ first
	 */
	if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
		sizeof(dev1->scsi3addr)) != 0)
		return 0;
	if (memcmp(dev1->device_id, dev2->device_id,
		sizeof(dev1->device_id)) != 0)
		return 0;
	if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
		return 0;
	if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
		return 0;
	if (dev1->devtype != dev2->devtype)
		return 0;
	if (dev1->bus != dev2->bus)
		return 0;
	return 1;
}

1226 1227 1228 1229 1230 1231 1232 1233 1234
static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
	struct hpsa_scsi_dev_t *dev2)
{
	/* Device attributes that can change, but don't mean
	 * that the device is a different device, nor that the OS
	 * needs to be told anything about the change.
	 */
	if (dev1->raid_level != dev2->raid_level)
		return 1;
1235 1236 1237 1238
	if (dev1->offload_config != dev2->offload_config)
		return 1;
	if (dev1->offload_enabled != dev2->offload_enabled)
		return 1;
1239 1240
	if (dev1->queue_depth != dev2->queue_depth)
		return 1;
1241 1242 1243
	return 0;
}

1244 1245 1246
/* Find needle in haystack.  If exact match found, return DEVICE_SAME,
 * and return needle location in *index.  If scsi3addr matches, but not
 * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1247 1248 1249 1250
 * location in *index.
 * In the case of a minor device attribute change, such as RAID level, just
 * return DEVICE_UPDATED, along with the updated device's location in index.
 * If needle not found, return DEVICE_NOT_FOUND.
1251 1252 1253 1254 1255 1256 1257 1258 1259
 */
static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
	struct hpsa_scsi_dev_t *haystack[], int haystack_size,
	int *index)
{
	int i;
#define DEVICE_NOT_FOUND 0
#define DEVICE_CHANGED 1
#define DEVICE_SAME 2
1260
#define DEVICE_UPDATED 3
1261
	for (i = 0; i < haystack_size; i++) {
1262 1263
		if (haystack[i] == NULL) /* previously removed. */
			continue;
1264 1265
		if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
			*index = i;
1266 1267 1268
			if (device_is_the_same(needle, haystack[i])) {
				if (device_updated(needle, haystack[i]))
					return DEVICE_UPDATED;
1269
				return DEVICE_SAME;
1270
			} else {
1271 1272 1273
				/* Keep offline devices offline */
				if (needle->volume_offline)
					return DEVICE_NOT_FOUND;
1274
				return DEVICE_CHANGED;
1275
			}
1276 1277 1278 1279 1280 1281
		}
	}
	*index = -1;
	return DEVICE_NOT_FOUND;
}

1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
static void hpsa_monitor_offline_device(struct ctlr_info *h,
					unsigned char scsi3addr[])
{
	struct offline_device_entry *device;
	unsigned long flags;

	/* Check to see if device is already on the list */
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_for_each_entry(device, &h->offline_device_list, offline_list) {
		if (memcmp(device->scsi3addr, scsi3addr,
			sizeof(device->scsi3addr)) == 0) {
			spin_unlock_irqrestore(&h->offline_device_lock, flags);
			return;
		}
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);

	/* Device is not on the list, add it. */
	device = kmalloc(sizeof(*device), GFP_KERNEL);
	if (!device) {
		dev_warn(&h->pdev->dev, "out of memory in %s\n", __func__);
		return;
	}
	memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_add_tail(&device->offline_list, &h->offline_device_list);
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
}

/* Print a message explaining various offline volume states */
static void hpsa_show_volume_status(struct ctlr_info *h,
	struct hpsa_scsi_dev_t *sd)
{
	if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
	switch (sd->volume_offline) {
	case HPSA_LV_OK:
		break;
	case HPSA_LV_UNDERGOING_ERASE:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_RPI:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing rapid parity initialization process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_RPI:
		dev_info(&h->pdev->dev,
				"C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
				h->scsi_host->host_no,
				sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_ENCRYPTED_NO_KEY:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
		dev_info(&h->pdev->dev,
			"C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
			h->scsi_host->host_no,
			sd->bus, sd->target, sd->lun);
		break;
	}
}

1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
/*
 * Figure the list of physical drive pointers for a logical drive with
 * raid offload configured.
 */
static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices,
				struct hpsa_scsi_dev_t *logical_drive)
{
	struct raid_map_data *map = &logical_drive->raid_map;
	struct raid_map_disk_data *dd = &map->data[0];
	int i, j;
	int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
	int nraid_map_entries = le16_to_cpu(map->row_cnt) *
				le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int nphys_disk = le16_to_cpu(map->layout_map_count) *
				total_disks_per_row;
	int qdepth;

	if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
		nraid_map_entries = RAID_MAP_MAX_ENTRIES;

	qdepth = 0;
	for (i = 0; i < nraid_map_entries; i++) {
		logical_drive->phys_disk[i] = NULL;
		if (!logical_drive->offload_config)
			continue;
		for (j = 0; j < ndevices; j++) {
			if (dev[j]->devtype != TYPE_DISK)
				continue;
			if (is_logical_dev_addr_mode(dev[j]->scsi3addr))
				continue;
			if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
				continue;

			logical_drive->phys_disk[i] = dev[j];
			if (i < nphys_disk)
				qdepth = min(h->nr_cmds, qdepth +
				    logical_drive->phys_disk[i]->queue_depth);
			break;
		}

		/*
		 * This can happen if a physical drive is removed and
		 * the logical drive is degraded.  In that case, the RAID
		 * map data will refer to a physical disk which isn't actually
		 * present.  And in that case offload_enabled should already
		 * be 0, but we'll turn it off here just in case
		 */
		if (!logical_drive->phys_disk[i]) {
			logical_drive->offload_enabled = 0;
1438 1439
			logical_drive->offload_to_be_enabled = 0;
			logical_drive->queue_depth = 8;
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461
		}
	}
	if (nraid_map_entries)
		/*
		 * This is correct for reads, too high for full stripe writes,
		 * way too high for partial stripe writes
		 */
		logical_drive->queue_depth = qdepth;
	else
		logical_drive->queue_depth = h->nr_cmds;
}

static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
				struct hpsa_scsi_dev_t *dev[], int ndevices)
{
	int i;

	for (i = 0; i < ndevices; i++) {
		if (dev[i]->devtype != TYPE_DISK)
			continue;
		if (!is_logical_dev_addr_mode(dev[i]->scsi3addr))
			continue;
1462 1463 1464 1465 1466 1467 1468 1469 1470 1471

		/*
		 * If offload is currently enabled, the RAID map and
		 * phys_disk[] assignment *better* not be changing
		 * and since it isn't changing, we do not need to
		 * update it.
		 */
		if (dev[i]->offload_enabled)
			continue;

1472 1473 1474 1475
		hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
	}
}

1476
static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno,
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
	struct hpsa_scsi_dev_t *sd[], int nsds)
{
	/* sd contains scsi3 addresses and devtypes, and inquiry
	 * data.  This function takes what's in sd to be the current
	 * reality and updates h->dev[] to reflect that reality.
	 */
	int i, entry, device_change, changes = 0;
	struct hpsa_scsi_dev_t *csd;
	unsigned long flags;
	struct hpsa_scsi_dev_t **added, **removed;
	int nadded, nremoved;
	struct Scsi_Host *sh = NULL;

1490 1491
	added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
	removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504

	if (!added || !removed) {
		dev_warn(&h->pdev->dev, "out of memory in "
			"adjust_hpsa_scsi_table\n");
		goto free_and_out;
	}

	spin_lock_irqsave(&h->devlock, flags);

	/* find any devices in h->dev[] that are not in
	 * sd[] and remove them from h->dev[], and for any
	 * devices which have changed, remove the old device
	 * info and add the new device info.
1505 1506
	 * If minor device attributes change, just update
	 * the existing device structure.
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
	 */
	i = 0;
	nremoved = 0;
	nadded = 0;
	while (i < h->ndevices) {
		csd = h->dev[i];
		device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
			hpsa_scsi_remove_entry(h, hostno, i,
				removed, &nremoved);
			continue; /* remove ^^^, hence i not incremented */
		} else if (device_change == DEVICE_CHANGED) {
			changes++;
1521 1522
			hpsa_scsi_replace_entry(h, hostno, i, sd[entry],
				added, &nadded, removed, &nremoved);
1523 1524 1525 1526
			/* Set it to NULL to prevent it from being freed
			 * at the bottom of hpsa_update_scsi_devices()
			 */
			sd[entry] = NULL;
1527 1528
		} else if (device_change == DEVICE_UPDATED) {
			hpsa_scsi_update_entry(h, hostno, i, sd[entry]);
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
		}
		i++;
	}

	/* Now, make sure every device listed in sd[] is also
	 * listed in h->dev[], adding them if they aren't found
	 */

	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;
1540 1541 1542 1543 1544 1545 1546 1547

		/* Don't add devices which are NOT READY, FORMAT IN PROGRESS
		 * as the SCSI mid-layer does not handle such devices well.
		 * It relentlessly loops sending TUR at 3Hz, then READ(10)
		 * at 160Hz, and prevents the system from coming up.
		 */
		if (sd[i]->volume_offline) {
			hpsa_show_volume_status(h, sd[i]);
1548
			hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1549 1550 1551
			continue;
		}

1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
		device_change = hpsa_scsi_find_entry(sd[i], h->dev,
					h->ndevices, &entry);
		if (device_change == DEVICE_NOT_FOUND) {
			changes++;
			if (hpsa_scsi_add_entry(h, hostno, sd[i],
				added, &nadded) != 0)
				break;
			sd[i] = NULL; /* prevent from being freed later. */
		} else if (device_change == DEVICE_CHANGED) {
			/* should never happen... */
			changes++;
			dev_warn(&h->pdev->dev,
				"device unexpectedly changed.\n");
			/* but if it does happen, we just ignore that device */
		}
	}
1568 1569 1570 1571 1572 1573 1574 1575
	hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);

	/* Now that h->dev[]->phys_disk[] is coherent, we can enable
	 * any logical drives that need it enabled.
	 */
	for (i = 0; i < h->ndevices; i++)
		h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;

1576 1577
	spin_unlock_irqrestore(&h->devlock, flags);

1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
	/* Monitor devices which are in one of several NOT READY states to be
	 * brought online later. This must be done without holding h->devlock,
	 * so don't touch h->dev[]
	 */
	for (i = 0; i < nsds; i++) {
		if (!sd[i]) /* if already added above. */
			continue;
		if (sd[i]->volume_offline)
			hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
	}

1589 1590 1591 1592 1593 1594 1595 1596 1597 1598
	/* Don't notify scsi mid layer of any changes the first time through
	 * (or if there are no changes) scsi_scan_host will do it later the
	 * first time through.
	 */
	if (hostno == -1 || !changes)
		goto free_and_out;

	sh = h->scsi_host;
	/* Notify scsi mid layer of any removed devices */
	for (i = 0; i < nremoved; i++) {
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611
		if (removed[i]->expose_state & HPSA_SCSI_ADD) {
			struct scsi_device *sdev =
				scsi_device_lookup(sh, removed[i]->bus,
					removed[i]->target, removed[i]->lun);
			if (sdev != NULL) {
				scsi_remove_device(sdev);
				scsi_device_put(sdev);
			} else {
				/*
				 * We don't expect to get here.
				 * future cmds to this device will get selection
				 * timeout as if the device was gone.
				 */
1612 1613
				hpsa_show_dev_msg(KERN_WARNING, h, removed[i],
					"didn't find device for removal.");
1614
			}
1615 1616 1617 1618 1619 1620 1621
		}
		kfree(removed[i]);
		removed[i] = NULL;
	}

	/* Notify scsi mid layer of any added devices */
	for (i = 0; i < nadded; i++) {
1622 1623
		if (!(added[i]->expose_state & HPSA_SCSI_ADD))
			continue;
1624 1625 1626
		if (scsi_add_device(sh, added[i]->bus,
			added[i]->target, added[i]->lun) == 0)
			continue;
1627 1628
		hpsa_show_dev_msg(KERN_WARNING, h, added[i],
					"addition failed, device not added.");
1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640
		/* now we have to remove it from h->dev,
		 * since it didn't get added to scsi mid layer
		 */
		fixup_botched_add(h, added[i]);
	}

free_and_out:
	kfree(added);
	kfree(removed);
}

/*
1641
 * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667
 * Assume's h->devlock is held.
 */
static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
	int bus, int target, int lun)
{
	int i;
	struct hpsa_scsi_dev_t *sd;

	for (i = 0; i < h->ndevices; i++) {
		sd = h->dev[i];
		if (sd->bus == bus && sd->target == target && sd->lun == lun)
			return sd;
	}
	return NULL;
}

static int hpsa_slave_alloc(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd;
	unsigned long flags;
	struct ctlr_info *h;

	h = sdev_to_hba(sdev);
	spin_lock_irqsave(&h->devlock, flags);
	sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
		sdev_id(sdev), sdev->lun);
1668
	if (likely(sd)) {
1669
		atomic_set(&sd->ioaccel_cmds_out, 0);
1670 1671 1672
		sdev->hostdata = (sd->expose_state & HPSA_SCSI_ADD) ? sd : NULL;
	} else
		sdev->hostdata = NULL;
1673 1674 1675 1676
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
}

1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696
/* configure scsi device based on internal per-device structure */
static int hpsa_slave_configure(struct scsi_device *sdev)
{
	struct hpsa_scsi_dev_t *sd;
	int queue_depth;

	sd = sdev->hostdata;
	sdev->no_uld_attach = !sd || !(sd->expose_state & HPSA_ULD_ATTACH);

	if (sd)
		queue_depth = sd->queue_depth != 0 ?
			sd->queue_depth : sdev->host->can_queue;
	else
		queue_depth = sdev->host->can_queue;

	scsi_change_queue_depth(sdev, queue_depth);

	return 0;
}

1697 1698
static void hpsa_slave_destroy(struct scsi_device *sdev)
{
1699
	/* nothing to do. */
1700 1701
}

1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741
static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->ioaccel2_cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->ioaccel2_cmd_sg_list[i]);
		h->ioaccel2_cmd_sg_list[i] = NULL;
	}
	kfree(h->ioaccel2_cmd_sg_list);
	h->ioaccel2_cmd_sg_list = NULL;
}

static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->ioaccel2_cmd_sg_list =
		kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
					GFP_KERNEL);
	if (!h->ioaccel2_cmd_sg_list)
		return -ENOMEM;
	for (i = 0; i < h->nr_cmds; i++) {
		h->ioaccel2_cmd_sg_list[i] =
			kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
					h->maxsgentries, GFP_KERNEL);
		if (!h->ioaccel2_cmd_sg_list[i])
			goto clean;
	}
	return 0;

clean:
	hpsa_free_ioaccel2_sg_chain_blocks(h);
	return -ENOMEM;
}

1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (!h->cmd_sg_list)
		return;
	for (i = 0; i < h->nr_cmds; i++) {
		kfree(h->cmd_sg_list[i]);
		h->cmd_sg_list[i] = NULL;
	}
	kfree(h->cmd_sg_list);
	h->cmd_sg_list = NULL;
}

static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
{
	int i;

	if (h->chainsize <= 0)
		return 0;

	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
				GFP_KERNEL);
1765 1766
	if (!h->cmd_sg_list) {
		dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
1767
		return -ENOMEM;
1768
	}
1769 1770 1771
	for (i = 0; i < h->nr_cmds; i++) {
		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
						h->chainsize, GFP_KERNEL);
1772 1773
		if (!h->cmd_sg_list[i]) {
			dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
1774
			goto clean;
1775
		}
1776 1777 1778 1779 1780 1781 1782 1783
	}
	return 0;

clean:
	hpsa_free_sg_chain_blocks(h);
	return -ENOMEM;
}

1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816
static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp, struct CommandList *c)
{
	struct ioaccel2_sg_element *chain_block;
	u64 temp64;
	u32 chain_size;

	chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
	chain_size = le32_to_cpu(cp->data_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_size,
				PCI_DMA_TODEVICE);
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
		cp->sg->address = 0;
		return -1;
	}
	cp->sg->address = cpu_to_le64(temp64);
	return 0;
}

static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
	struct io_accel2_cmd *cp)
{
	struct ioaccel2_sg_element *chain_sg;
	u64 temp64;
	u32 chain_size;

	chain_sg = cp->sg;
	temp64 = le64_to_cpu(chain_sg->address);
	chain_size = le32_to_cpu(cp->data_len);
	pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
}

1817
static int hpsa_map_sg_chain_block(struct ctlr_info *h,
1818 1819 1820 1821
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg, *chain_block;
	u64 temp64;
1822
	u32 chain_len;
1823 1824 1825

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
	chain_block = h->cmd_sg_list[c->cmdindex];
1826 1827
	chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
	chain_len = sizeof(*chain_sg) *
D
Don Brace 已提交
1828
		(le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
1829 1830
	chain_sg->Len = cpu_to_le32(chain_len);
	temp64 = pci_map_single(h->pdev, chain_block, chain_len,
1831
				PCI_DMA_TODEVICE);
1832 1833
	if (dma_mapping_error(&h->pdev->dev, temp64)) {
		/* prevent subsequent unmapping */
1834
		chain_sg->Addr = cpu_to_le64(0);
1835 1836
		return -1;
	}
1837
	chain_sg->Addr = cpu_to_le64(temp64);
1838
	return 0;
1839 1840 1841 1842 1843 1844 1845
}

static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
	struct CommandList *c)
{
	struct SGDescriptor *chain_sg;

1846
	if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
1847 1848 1849
		return;

	chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
1850 1851
	pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
			le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
1852 1853
}

1854 1855 1856 1857 1858 1859

/* Decode the various types of errors on ioaccel2 path.
 * Return 1 for any error that should generate a RAID path retry.
 * Return 0 for errors that don't require a RAID path retry.
 */
static int handle_ioaccel_mode2_error(struct ctlr_info *h,
1860 1861 1862 1863 1864
					struct CommandList *c,
					struct scsi_cmnd *cmd,
					struct io_accel2_cmd *c2)
{
	int data_len;
1865
	int retry = 0;
1866
	u32 ioaccel2_resid = 0;
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876

	switch (c2->error_data.serv_response) {
	case IOACCEL2_SERV_RESPONSE_COMPLETE:
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
			dev_warn(&h->pdev->dev,
				"%s: task complete with check condition.\n",
				"HP SSD Smart Path");
1877
			cmd->result |= SAM_STAT_CHECK_CONDITION;
1878
			if (c2->error_data.data_present !=
1879 1880 1881
					IOACCEL2_SENSE_DATA_PRESENT) {
				memset(cmd->sense_buffer, 0,
					SCSI_SENSE_BUFFERSIZE);
1882
				break;
1883
			}
1884 1885 1886 1887 1888 1889 1890 1891 1892
			/* copy the sense data */
			data_len = c2->error_data.sense_data_len;
			if (data_len > SCSI_SENSE_BUFFERSIZE)
				data_len = SCSI_SENSE_BUFFERSIZE;
			if (data_len > sizeof(c2->error_data.sense_data_buff))
				data_len =
					sizeof(c2->error_data.sense_data_buff);
			memcpy(cmd->sense_buffer,
				c2->error_data.sense_data_buff, data_len);
1893
			retry = 1;
1894 1895 1896 1897 1898
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
			dev_warn(&h->pdev->dev,
				"%s: task complete with BUSY status.\n",
				"HP SSD Smart Path");
1899
			retry = 1;
1900 1901 1902 1903 1904
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
			dev_warn(&h->pdev->dev,
				"%s: task complete with reservation conflict.\n",
				"HP SSD Smart Path");
1905
			retry = 1;
1906 1907
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
1908
			retry = 1;
1909 1910 1911 1912 1913
			break;
		case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
			dev_warn(&h->pdev->dev,
				"%s: task complete with aborted status.\n",
				"HP SSD Smart Path");
1914
			retry = 1;
1915 1916 1917 1918 1919
			break;
		default:
			dev_warn(&h->pdev->dev,
				"%s: task complete with unrecognized status: 0x%02x\n",
				"HP SSD Smart Path", c2->error_data.status);
1920
			retry = 1;
1921 1922 1923 1924
			break;
		}
		break;
	case IOACCEL2_SERV_RESPONSE_FAILURE:
1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
		switch (c2->error_data.status) {
		case IOACCEL2_STATUS_SR_IO_ERROR:
		case IOACCEL2_STATUS_SR_IO_ABORTED:
		case IOACCEL2_STATUS_SR_OVERRUN:
			retry = 1;
			break;
		case IOACCEL2_STATUS_SR_UNDERRUN:
			cmd->result = (DID_OK << 16);		/* host byte */
			cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
			ioaccel2_resid = get_unaligned_le32(
						&c2->error_data.resid_cnt[0]);
			scsi_set_resid(cmd, ioaccel2_resid);
			break;
		case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
		case IOACCEL2_STATUS_SR_INVALID_DEVICE:
		case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
			/* We will get an event from ctlr to trigger rescan */
			retry = 1;
			break;
		default:
			retry = 1;
			dev_warn(&h->pdev->dev,
				"unexpected delivery or target failure, status = 0x%02x\n",
				c2->error_data.status);
		}
1950 1951 1952 1953 1954 1955 1956
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
		dev_warn(&h->pdev->dev, "task management function rejected.\n");
1957
		retry = 1;
1958 1959 1960 1961 1962 1963 1964
		break;
	case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
		dev_warn(&h->pdev->dev, "task management function invalid LUN\n");
		break;
	default:
		dev_warn(&h->pdev->dev,
			"%s: Unrecognized server response: 0x%02x\n",
1965 1966 1967
			"HP SSD Smart Path",
			c2->error_data.serv_response);
		retry = 1;
1968 1969
		break;
	}
1970 1971

	return retry;	/* retry on raid path? */
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994
}

static void process_ioaccel2_completion(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd,
		struct hpsa_scsi_dev_t *dev)
{
	struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];

	/* check for good status */
	if (likely(c2->error_data.serv_response == 0 &&
			c2->error_data.status == 0)) {
		cmd_free(h, c);
		cmd->scsi_done(cmd);
		return;
	}

	/* Any RAID offload error results in retry which will use
	 * the normal I/O path so the controller can handle whatever's
	 * wrong.
	 */
	if (is_logical_dev_addr_mode(dev->scsi3addr) &&
		c2->error_data.serv_response ==
			IOACCEL2_SERV_RESPONSE_FAILURE) {
1995 1996 1997 1998
		if (c2->error_data.status ==
			IOACCEL2_STATUS_SR_IOACCEL_DISABLED)
			dev->offload_enabled = 0;
		goto retry_cmd;
1999
	}
2000 2001 2002 2003

	if (handle_ioaccel_mode2_error(h, c, cmd, c2))
		goto retry_cmd;

2004 2005
	cmd_free(h, c);
	cmd->scsi_done(cmd);
2006 2007 2008 2009 2010
	return;

retry_cmd:
	INIT_WORK(&c->work, hpsa_command_resubmit_worker);
	queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
2011 2012
}

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
/* Returns 0 on success, < 0 otherwise. */
static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
					struct CommandList *cp)
{
	u8 tmf_status = cp->err_info->ScsiStatus;

	switch (tmf_status) {
	case CISS_TMF_COMPLETE:
		/*
		 * CISS_TMF_COMPLETE never happens, instead,
		 * ei->CommandStatus == 0 for this case.
		 */
	case CISS_TMF_SUCCESS:
		return 0;
	case CISS_TMF_INVALID_FRAME:
	case CISS_TMF_NOT_SUPPORTED:
	case CISS_TMF_FAILED:
	case CISS_TMF_WRONG_LUN:
	case CISS_TMF_OVERLAPPED_TAG:
		break;
	default:
		dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
				tmf_status);
		break;
	}
	return -tmf_status;
}

2041
static void complete_scsi_command(struct CommandList *cp)
2042 2043 2044 2045
{
	struct scsi_cmnd *cmd;
	struct ctlr_info *h;
	struct ErrorInfo *ei;
2046
	struct hpsa_scsi_dev_t *dev;
2047
	struct io_accel2_cmd *c2;
2048

2049 2050 2051
	u8 sense_key;
	u8 asc;      /* additional sense code */
	u8 ascq;     /* additional sense code qualifier */
2052
	unsigned long sense_data_size;
2053 2054

	ei = cp->err_info;
2055
	cmd = cp->scsi_cmd;
2056
	h = cp->h;
2057
	dev = cmd->device->hostdata;
2058
	c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2059 2060

	scsi_dma_unmap(cmd); /* undo the DMA mappings */
2061
	if ((cp->cmd_type == CMD_SCSI) &&
D
Don Brace 已提交
2062
		(le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2063
		hpsa_unmap_sg_chain_block(h, cp);
2064

2065 2066 2067 2068
	if ((cp->cmd_type == CMD_IOACCEL2) &&
		(c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
		hpsa_unmap_ioaccel2_sg_chain_block(h, c2);

2069 2070
	cmd->result = (DID_OK << 16); 		/* host byte */
	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
2071

2072 2073 2074
	if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1)
		atomic_dec(&cp->phys_disk->ioaccel_cmds_out);

2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087
	/*
	 * We check for lockup status here as it may be set for
	 * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
	 * fail_all_oustanding_cmds()
	 */
	if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
		/* DID_NO_CONNECT will prevent a retry */
		cmd->result = DID_NO_CONNECT << 16;
		cmd_free(h, cp);
		cmd->scsi_done(cmd);
		return;
	}

2088 2089 2090
	if (cp->cmd_type == CMD_IOACCEL2)
		return process_ioaccel2_completion(h, cp, cmd, dev);

2091 2092
	scsi_set_resid(cmd, ei->ResidualCnt);
	if (ei->CommandStatus == 0) {
2093 2094
		if (cp->cmd_type == CMD_IOACCEL1)
			atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
2095 2096 2097 2098 2099
		cmd_free(h, cp);
		cmd->scsi_done(cmd);
		return;
	}

2100 2101 2102 2103 2104
	/* For I/O accelerator commands, copy over some fields to the normal
	 * CISS header used below for error handling.
	 */
	if (cp->cmd_type == CMD_IOACCEL1) {
		struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
D
Don Brace 已提交
2105 2106 2107 2108
		cp->Header.SGList = scsi_sg_count(cmd);
		cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
		cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
			IOACCEL1_IOFLAGS_CDBLEN_MASK;
2109
		cp->Header.tag = c->tag;
2110 2111
		memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
		memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2112 2113 2114 2115 2116 2117 2118 2119

		/* Any RAID offload error results in retry which will use
		 * the normal I/O path so the controller can handle whatever's
		 * wrong.
		 */
		if (is_logical_dev_addr_mode(dev->scsi3addr)) {
			if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
				dev->offload_enabled = 0;
2120 2121 2122
			INIT_WORK(&cp->work, hpsa_command_resubmit_worker);
			queue_work_on(raw_smp_processor_id(),
					h->resubmit_wq, &cp->work);
2123 2124
			return;
		}
2125 2126
	}

2127 2128 2129 2130
	/* an error has occurred */
	switch (ei->CommandStatus) {

	case CMD_TARGET_STATUS:
2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142
		cmd->result |= ei->ScsiStatus;
		/* copy the sense data */
		if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
			sense_data_size = SCSI_SENSE_BUFFERSIZE;
		else
			sense_data_size = sizeof(ei->SenseInfo);
		if (ei->SenseLen < sense_data_size)
			sense_data_size = ei->SenseLen;
		memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
		if (ei->ScsiStatus)
			decode_sense_data(ei->SenseInfo, sense_data_size,
				&sense_key, &asc, &ascq);
2143
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2144
			if (sense_key == ABORTED_COMMAND) {
2145
				cmd->result |= DID_SOFT_ERROR << 16;
2146 2147
				break;
			}
2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182
			break;
		}
		/* Problem was not a check condition
		 * Pass it up to the upper layers...
		 */
		if (ei->ScsiStatus) {
			dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
				"Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
				"Returning result: 0x%x\n",
				cp, ei->ScsiStatus,
				sense_key, asc, ascq,
				cmd->result);
		} else {  /* scsi status is zero??? How??? */
			dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
				"Returning no connection.\n", cp),

			/* Ordinarily, this case should never happen,
			 * but there is a bug in some released firmware
			 * revisions that allows it to happen if, for
			 * example, a 4100 backplane loses power and
			 * the tape drive is in it.  We assume that
			 * it's a fatal error of some kind because we
			 * can't show that it wasn't. We will make it
			 * look like selection timeout since that is
			 * the most common reason for this to occur,
			 * and it's severe enough.
			 */

			cmd->result = DID_NO_CONNECT << 16;
		}
		break;

	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
2183 2184
		dev_warn(&h->pdev->dev,
			"CDB %16phN data overrun\n", cp->Request.CDB);
2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198
		break;
	case CMD_INVALID: {
		/* print_bytes(cp, sizeof(*cp), 1, 0);
		print_cmd(cp); */
		/* We get CMD_INVALID if you address a non-existent device
		 * instead of a selection timeout (no response).  You will
		 * see this if you yank out a drive, then try to access it.
		 * This is kind of a shame because it means that any other
		 * CMD_INVALID (e.g. driver bug) will get interpreted as a
		 * missing target. */
		cmd->result = DID_NO_CONNECT << 16;
	}
		break;
	case CMD_PROTOCOL_ERR:
2199
		cmd->result = DID_ERROR << 16;
2200 2201
		dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
				cp->Request.CDB);
2202 2203 2204
		break;
	case CMD_HARDWARE_ERR:
		cmd->result = DID_ERROR << 16;
2205 2206
		dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
			cp->Request.CDB);
2207 2208 2209
		break;
	case CMD_CONNECTION_LOST:
		cmd->result = DID_ERROR << 16;
2210 2211
		dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
			cp->Request.CDB);
2212 2213 2214
		break;
	case CMD_ABORTED:
		cmd->result = DID_ABORT << 16;
2215 2216
		dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
				cp->Request.CDB, ei->ScsiStatus);
2217 2218 2219
		break;
	case CMD_ABORT_FAILED:
		cmd->result = DID_ERROR << 16;
2220 2221
		dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
			cp->Request.CDB);
2222 2223
		break;
	case CMD_UNSOLICITED_ABORT:
2224
		cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2225 2226
		dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
			cp->Request.CDB);
2227 2228 2229
		break;
	case CMD_TIMEOUT:
		cmd->result = DID_TIME_OUT << 16;
2230 2231
		dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
			cp->Request.CDB);
2232
		break;
2233 2234 2235 2236
	case CMD_UNABORTABLE:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "Command unabortable\n");
		break;
2237 2238 2239 2240
	case CMD_TMF_STATUS:
		if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
			cmd->result = DID_ERROR << 16;
		break;
2241 2242 2243 2244 2245 2246 2247 2248
	case CMD_IOACCEL_DISABLED:
		/* This only handles the direct pass-through case since RAID
		 * offload is handled above.  Just attempt a retry.
		 */
		cmd->result = DID_SOFT_ERROR << 16;
		dev_warn(&h->pdev->dev,
				"cp %p had HP SSD Smart Path error\n", cp);
		break;
2249 2250 2251 2252 2253 2254
	default:
		cmd->result = DID_ERROR << 16;
		dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
				cp, ei->CommandStatus);
	}
	cmd_free(h, cp);
2255
	cmd->scsi_done(cmd);
2256 2257 2258 2259 2260 2261 2262
}

static void hpsa_pci_unmap(struct pci_dev *pdev,
	struct CommandList *c, int sg_used, int data_direction)
{
	int i;

2263 2264 2265 2266
	for (i = 0; i < sg_used; i++)
		pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
				le32_to_cpu(c->SG[i].Len),
				data_direction);
2267 2268
}

2269
static int hpsa_map_one(struct pci_dev *pdev,
2270 2271 2272 2273 2274
		struct CommandList *cp,
		unsigned char *buf,
		size_t buflen,
		int data_direction)
{
2275
	u64 addr64;
2276 2277 2278

	if (buflen == 0 || data_direction == PCI_DMA_NONE) {
		cp->Header.SGList = 0;
2279
		cp->Header.SGTotal = cpu_to_le16(0);
2280
		return 0;
2281 2282
	}

2283
	addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2284
	if (dma_mapping_error(&pdev->dev, addr64)) {
2285
		/* Prevent subsequent unmap of something never mapped */
2286
		cp->Header.SGList = 0;
2287
		cp->Header.SGTotal = cpu_to_le16(0);
2288
		return -1;
2289
	}
2290 2291 2292 2293 2294
	cp->SG[0].Addr = cpu_to_le64(addr64);
	cp->SG[0].Len = cpu_to_le32(buflen);
	cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
	cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
	cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2295
	return 0;
2296 2297
}

2298 2299 2300 2301
#define NO_TIMEOUT ((unsigned long) -1)
#define DEFAULT_TIMEOUT 30000 /* milliseconds */
static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
	struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2302 2303 2304 2305
{
	DECLARE_COMPLETION_ONSTACK(wait);

	c->waiting = &wait;
2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327
	__enqueue_cmd_and_start_io(h, c, reply_queue);
	if (timeout_msecs == NO_TIMEOUT) {
		/* TODO: get rid of this no-timeout thing */
		wait_for_completion_io(&wait);
		return IO_OK;
	}
	if (!wait_for_completion_io_timeout(&wait,
					msecs_to_jiffies(timeout_msecs))) {
		dev_warn(&h->pdev->dev, "Command timed out.\n");
		return -ETIMEDOUT;
	}
	return IO_OK;
}

static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
				   int reply_queue, unsigned long timeout_msecs)
{
	if (unlikely(lockup_detected(h))) {
		c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
		return IO_OK;
	}
	return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2328 2329
}

2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
static u32 lockup_detected(struct ctlr_info *h)
{
	int cpu;
	u32 rc, *lockup_detected;

	cpu = get_cpu();
	lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
	rc = *lockup_detected;
	put_cpu();
	return rc;
}

2342
#define MAX_DRIVER_CMD_RETRIES 25
2343 2344
static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
	struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2345
{
2346
	int backoff_time = 10, retry_count = 0;
2347
	int rc;
2348 2349

	do {
2350
		memset(c->err_info, 0, sizeof(*c->err_info));
2351 2352 2353 2354
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						  timeout_msecs);
		if (rc)
			break;
2355
		retry_count++;
2356 2357 2358 2359 2360
		if (retry_count > 3) {
			msleep(backoff_time);
			if (backoff_time < 1000)
				backoff_time *= 2;
		}
2361
	} while ((check_for_unit_attention(h, c) ||
2362 2363
			check_for_busy(h, c)) &&
			retry_count <= MAX_DRIVER_CMD_RETRIES);
2364
	hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2365 2366 2367
	if (retry_count > MAX_DRIVER_CMD_RETRIES)
		rc = -EIO;
	return rc;
2368 2369
}

2370 2371
static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
				struct CommandList *c)
2372
{
2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389
	const u8 *cdb = c->Request.CDB;
	const u8 *lun = c->Header.LUN.LunAddrBytes;

	dev_warn(&h->pdev->dev, "%s: LUN:%02x%02x%02x%02x%02x%02x%02x%02x"
	" CDB:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		txt, lun[0], lun[1], lun[2], lun[3],
		lun[4], lun[5], lun[6], lun[7],
		cdb[0], cdb[1], cdb[2], cdb[3],
		cdb[4], cdb[5], cdb[6], cdb[7],
		cdb[8], cdb[9], cdb[10], cdb[11],
		cdb[12], cdb[13], cdb[14], cdb[15]);
}

static void hpsa_scsi_interpret_error(struct ctlr_info *h,
			struct CommandList *cp)
{
	const struct ErrorInfo *ei = cp->err_info;
2390
	struct device *d = &cp->h->pdev->dev;
2391 2392
	u8 sense_key, asc, ascq;
	int sense_len;
2393 2394 2395

	switch (ei->CommandStatus) {
	case CMD_TARGET_STATUS:
2396 2397 2398 2399 2400 2401
		if (ei->SenseLen > sizeof(ei->SenseInfo))
			sense_len = sizeof(ei->SenseInfo);
		else
			sense_len = ei->SenseLen;
		decode_sense_data(ei->SenseInfo, sense_len,
					&sense_key, &asc, &ascq);
2402 2403
		hpsa_print_cmd(h, "SCSI status", cp);
		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2404 2405
			dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
				sense_key, asc, ascq);
2406
		else
2407
			dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2408 2409 2410 2411 2412 2413 2414 2415 2416
		if (ei->ScsiStatus == 0)
			dev_warn(d, "SCSI status is abnormally zero.  "
			"(probably indicates selection timeout "
			"reported incorrectly due to a known "
			"firmware bug, circa July, 2001.)\n");
		break;
	case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
		break;
	case CMD_DATA_OVERRUN:
2417
		hpsa_print_cmd(h, "overrun condition", cp);
2418 2419 2420 2421 2422
		break;
	case CMD_INVALID: {
		/* controller unfortunately reports SCSI passthru's
		 * to non-existent targets as invalid commands.
		 */
2423 2424
		hpsa_print_cmd(h, "invalid command", cp);
		dev_warn(d, "probably means device no longer present\n");
2425 2426 2427
		}
		break;
	case CMD_PROTOCOL_ERR:
2428
		hpsa_print_cmd(h, "protocol error", cp);
2429 2430
		break;
	case CMD_HARDWARE_ERR:
2431
		hpsa_print_cmd(h, "hardware error", cp);
2432 2433
		break;
	case CMD_CONNECTION_LOST:
2434
		hpsa_print_cmd(h, "connection lost", cp);
2435 2436
		break;
	case CMD_ABORTED:
2437
		hpsa_print_cmd(h, "aborted", cp);
2438 2439
		break;
	case CMD_ABORT_FAILED:
2440
		hpsa_print_cmd(h, "abort failed", cp);
2441 2442
		break;
	case CMD_UNSOLICITED_ABORT:
2443
		hpsa_print_cmd(h, "unsolicited abort", cp);
2444 2445
		break;
	case CMD_TIMEOUT:
2446
		hpsa_print_cmd(h, "timed out", cp);
2447
		break;
2448
	case CMD_UNABORTABLE:
2449
		hpsa_print_cmd(h, "unabortable", cp);
2450
		break;
2451 2452 2453
	case CMD_CTLR_LOCKUP:
		hpsa_print_cmd(h, "controller lockup detected", cp);
		break;
2454
	default:
2455 2456
		hpsa_print_cmd(h, "unknown status", cp);
		dev_warn(d, "Unknown command status %x\n",
2457 2458 2459 2460 2461
				ei->CommandStatus);
	}
}

static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
2462
			u16 page, unsigned char *buf,
2463 2464 2465 2466 2467 2468
			unsigned char bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2469
	c = cmd_alloc(h);
2470

2471
	if (c == NULL) {
2472
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2473
		return -ENOMEM;
2474 2475
	}

2476 2477 2478 2479 2480
	if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
2481 2482 2483 2484
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
2485 2486
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2487
		hpsa_scsi_interpret_error(h, c);
2488 2489
		rc = -1;
	}
2490
out:
2491
	cmd_free(h, c);
2492 2493 2494
	return rc;
}

2495 2496 2497 2498 2499 2500 2501 2502
static int hpsa_bmic_ctrl_mode_sense(struct ctlr_info *h,
		unsigned char *scsi3addr, unsigned char page,
		struct bmic_controller_parameters *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2503
	c = cmd_alloc(h);
2504
	if (c == NULL) {			/* trouble... */
2505
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2506 2507 2508 2509 2510 2511 2512 2513
		return -ENOMEM;
	}

	if (fill_cmd(c, BMIC_SENSE_CONTROLLER_PARAMETERS, h, buf, bufsize,
			page, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
2514 2515 2516 2517
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
			PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
2518 2519 2520 2521 2522 2523
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
2524
	cmd_free(h, c);
2525 2526 2527
	return rc;
	}

2528
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
2529
	u8 reset_type, int reply_queue)
2530 2531 2532 2533 2534
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

2535
	c = cmd_alloc(h);
2536 2537

	if (c == NULL) {			/* trouble... */
2538
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2539
		return -ENOMEM;
2540 2541
	}

2542
	/* fill_cmd can't fail here, no data buffer to map. */
2543 2544 2545
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
			scsi3addr, TYPE_MSG);
	c->Request.CDB[1] = reset_type; /* fill_cmd defaults to LUN reset */
2546 2547 2548 2549 2550
	rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
	if (rc) {
		dev_warn(&h->pdev->dev, "Failed to send reset command\n");
		goto out;
	}
2551 2552 2553 2554
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	if (ei->CommandStatus != 0) {
2555
		hpsa_scsi_interpret_error(h, c);
2556 2557
		rc = -1;
	}
2558
out:
2559
	cmd_free(h, c);
2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572
	return rc;
}

static void hpsa_get_raid_level(struct ctlr_info *h,
	unsigned char *scsi3addr, unsigned char *raid_level)
{
	int rc;
	unsigned char *buf;

	*raid_level = RAID_UNKNOWN;
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
2573
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0xC1, buf, 64);
2574 2575 2576 2577 2578 2579 2580 2581
	if (rc == 0)
		*raid_level = buf[8];
	if (*raid_level > RAID_UNKNOWN)
		*raid_level = RAID_UNKNOWN;
	kfree(buf);
	return;
}

2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593
#define HPSA_MAP_DEBUG
#ifdef HPSA_MAP_DEBUG
static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
				struct raid_map_data *map_buff)
{
	struct raid_map_disk_data *dd = &map_buff->data[0];
	int map, row, col;
	u16 map_cnt, row_cnt, disks_per_row;

	if (rc != 0)
		return;

2594 2595 2596 2597
	/* Show details only if debugging has been activated. */
	if (h->raid_offload_debug < 2)
		return;

2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621
	dev_info(&h->pdev->dev, "structure_size = %u\n",
				le32_to_cpu(map_buff->structure_size));
	dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
			le32_to_cpu(map_buff->volume_blk_size));
	dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
			le64_to_cpu(map_buff->volume_blk_cnt));
	dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
			map_buff->phys_blk_shift);
	dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
			map_buff->parity_rotation_shift);
	dev_info(&h->pdev->dev, "strip_size = %u\n",
			le16_to_cpu(map_buff->strip_size));
	dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
			le64_to_cpu(map_buff->disk_starting_blk));
	dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
			le64_to_cpu(map_buff->disk_blk_cnt));
	dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
			le16_to_cpu(map_buff->data_disks_per_row));
	dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
			le16_to_cpu(map_buff->metadata_disks_per_row));
	dev_info(&h->pdev->dev, "row_cnt = %u\n",
			le16_to_cpu(map_buff->row_cnt));
	dev_info(&h->pdev->dev, "layout_map_count = %u\n",
			le16_to_cpu(map_buff->layout_map_count));
D
Don Brace 已提交
2622
	dev_info(&h->pdev->dev, "flags = 0x%x\n",
2623
			le16_to_cpu(map_buff->flags));
D
Don Brace 已提交
2624 2625 2626
	dev_info(&h->pdev->dev, "encrypytion = %s\n",
			le16_to_cpu(map_buff->flags) &
			RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
2627 2628
	dev_info(&h->pdev->dev, "dekindex = %u\n",
			le16_to_cpu(map_buff->dekindex));
2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666
	map_cnt = le16_to_cpu(map_buff->layout_map_count);
	for (map = 0; map < map_cnt; map++) {
		dev_info(&h->pdev->dev, "Map%u:\n", map);
		row_cnt = le16_to_cpu(map_buff->row_cnt);
		for (row = 0; row < row_cnt; row++) {
			dev_info(&h->pdev->dev, "  Row%u:\n", row);
			disks_per_row =
				le16_to_cpu(map_buff->data_disks_per_row);
			for (col = 0; col < disks_per_row; col++, dd++)
				dev_info(&h->pdev->dev,
					"    D%02u: h=0x%04x xor=%u,%u\n",
					col, dd->ioaccel_handle,
					dd->xor_mult[0], dd->xor_mult[1]);
			disks_per_row =
				le16_to_cpu(map_buff->metadata_disks_per_row);
			for (col = 0; col < disks_per_row; col++, dd++)
				dev_info(&h->pdev->dev,
					"    M%02u: h=0x%04x xor=%u,%u\n",
					col, dd->ioaccel_handle,
					dd->xor_mult[0], dd->xor_mult[1]);
		}
	}
}
#else
static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
			__attribute__((unused)) int rc,
			__attribute__((unused)) struct raid_map_data *map_buff)
{
}
#endif

static int hpsa_get_raid_map(struct ctlr_info *h,
	unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
{
	int rc = 0;
	struct CommandList *c;
	struct ErrorInfo *ei;

2667
	c = cmd_alloc(h);
2668
	if (c == NULL) {
2669
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2670 2671 2672 2673 2674 2675
		return -ENOMEM;
	}
	if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
			sizeof(this_device->raid_map), 0,
			scsi3addr, TYPE_CMD)) {
		dev_warn(&h->pdev->dev, "Out of memory in hpsa_get_raid_map()\n");
2676 2677
		rc = -ENOMEM;
		goto out;
2678
	}
2679 2680 2681 2682
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
2683 2684
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2685
		hpsa_scsi_interpret_error(h, c);
2686 2687
		rc = -1;
		goto out;
2688
	}
2689
	cmd_free(h, c);
2690 2691 2692 2693 2694 2695 2696 2697 2698

	/* @todo in the future, dynamically allocate RAID map memory */
	if (le32_to_cpu(this_device->raid_map.structure_size) >
				sizeof(this_device->raid_map)) {
		dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
		rc = -1;
	}
	hpsa_debug_map_buff(h, rc, &this_device->raid_map);
	return rc;
2699 2700 2701
out:
	cmd_free(h, c);
	return rc;
2702 2703
}

2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720
static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
		unsigned char scsi3addr[], u16 bmic_device_index,
		struct bmic_identify_physical_device *buf, size_t bufsize)
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;

	c = cmd_alloc(h);
	rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
		0, RAID_CTLR_LUNID, TYPE_CMD);
	if (rc)
		goto out;

	c->Request.CDB[2] = bmic_device_index & 0xff;
	c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;

2721 2722
	hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
						NO_TIMEOUT);
2723 2724 2725 2726 2727 2728 2729 2730 2731 2732
	ei = c->err_info;
	if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
		hpsa_scsi_interpret_error(h, c);
		rc = -1;
	}
out:
	cmd_free(h, c);
	return rc;
}

2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775
static int hpsa_vpd_page_supported(struct ctlr_info *h,
	unsigned char scsi3addr[], u8 page)
{
	int rc;
	int i;
	int pages;
	unsigned char *buf, bufsize;

	buf = kzalloc(256, GFP_KERNEL);
	if (!buf)
		return 0;

	/* Get the size of the page list first */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
				VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
				buf, HPSA_VPD_HEADER_SZ);
	if (rc != 0)
		goto exit_unsupported;
	pages = buf[3];
	if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
		bufsize = pages + HPSA_VPD_HEADER_SZ;
	else
		bufsize = 255;

	/* Get the whole VPD page list */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
				VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
				buf, bufsize);
	if (rc != 0)
		goto exit_unsupported;

	pages = buf[3];
	for (i = 1; i <= pages; i++)
		if (buf[3 + i] == page)
			goto exit_supported;
exit_unsupported:
	kfree(buf);
	return 0;
exit_supported:
	kfree(buf);
	return 1;
}

2776 2777 2778 2779 2780 2781 2782 2783 2784
static void hpsa_get_ioaccel_status(struct ctlr_info *h,
	unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
{
	int rc;
	unsigned char *buf;
	u8 ioaccel_status;

	this_device->offload_config = 0;
	this_device->offload_enabled = 0;
2785
	this_device->offload_to_be_enabled = 0;
2786 2787 2788 2789

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return;
2790 2791
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
		goto out;
2792
	rc = hpsa_scsi_do_inquiry(h, scsi3addr,
2793
			VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808
	if (rc != 0)
		goto out;

#define IOACCEL_STATUS_BYTE 4
#define OFFLOAD_CONFIGURED_BIT 0x01
#define OFFLOAD_ENABLED_BIT 0x02
	ioaccel_status = buf[IOACCEL_STATUS_BYTE];
	this_device->offload_config =
		!!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
	if (this_device->offload_config) {
		this_device->offload_enabled =
			!!(ioaccel_status & OFFLOAD_ENABLED_BIT);
		if (hpsa_get_raid_map(h, scsi3addr, this_device))
			this_device->offload_enabled = 0;
	}
2809
	this_device->offload_to_be_enabled = this_device->offload_enabled;
2810 2811 2812 2813 2814
out:
	kfree(buf);
	return;
}

2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825
/* Get the device id from inquiry page 0x83 */
static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
	unsigned char *device_id, int buflen)
{
	int rc;
	unsigned char *buf;

	if (buflen > 16)
		buflen = 16;
	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
2826
		return -ENOMEM;
2827
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0x83, buf, 64);
2828 2829 2830 2831 2832 2833 2834
	if (rc == 0)
		memcpy(device_id, &buf[8], buflen);
	kfree(buf);
	return rc != 0;
}

static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
2835
		void *buf, int bufsize,
2836 2837 2838 2839 2840 2841 2842
		int extended_response)
{
	int rc = IO_OK;
	struct CommandList *c;
	unsigned char scsi3addr[8];
	struct ErrorInfo *ei;

2843
	c = cmd_alloc(h);
2844
	if (c == NULL) {			/* trouble... */
2845
		dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
2846 2847
		return -1;
	}
2848 2849
	/* address the controller */
	memset(scsi3addr, 0, sizeof(scsi3addr));
2850 2851 2852 2853 2854
	if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
		buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
		rc = -1;
		goto out;
	}
2855 2856
	if (extended_response)
		c->Request.CDB[1] = extended_response;
2857 2858 2859 2860
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_FROMDEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
2861 2862 2863
	ei = c->err_info;
	if (ei->CommandStatus != 0 &&
	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
2864
		hpsa_scsi_interpret_error(h, c);
2865
		rc = -1;
2866
	} else {
2867 2868 2869
		struct ReportLUNdata *rld = buf;

		if (rld->extended_response_flag != extended_response) {
2870 2871 2872
			dev_err(&h->pdev->dev,
				"report luns requested format %u, got %u\n",
				extended_response,
2873
				rld->extended_response_flag);
2874 2875
			rc = -1;
		}
2876
	}
2877
out:
2878
	cmd_free(h, c);
2879 2880 2881 2882
	return rc;
}

static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
2883
		struct ReportExtendedLUNdata *buf, int bufsize)
2884
{
2885 2886
	return hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
						HPSA_REPORT_PHYS_EXTENDED);
2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902
}

static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
		struct ReportLUNdata *buf, int bufsize)
{
	return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
}

static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
	int bus, int target, int lun)
{
	device->bus = bus;
	device->target = target;
	device->lun = lun;
}

2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916
/* Use VPD inquiry to get details of volume status */
static int hpsa_get_volume_status(struct ctlr_info *h,
					unsigned char scsi3addr[])
{
	int rc;
	int status;
	int size;
	unsigned char *buf;

	buf = kzalloc(64, GFP_KERNEL);
	if (!buf)
		return HPSA_VPD_LV_STATUS_UNSUPPORTED;

	/* Does controller have VPD for logical volume status? */
2917
	if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
2918 2919 2920 2921 2922
		goto exit_failed;

	/* Get the size of the VPD return buffer */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
					buf, HPSA_VPD_HEADER_SZ);
2923
	if (rc != 0)
2924 2925 2926 2927 2928 2929
		goto exit_failed;
	size = buf[3];

	/* Now get the whole VPD buffer */
	rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
					buf, size + HPSA_VPD_HEADER_SZ);
2930
	if (rc != 0)
2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943
		goto exit_failed;
	status = buf[4]; /* status byte */

	kfree(buf);
	return status;
exit_failed:
	kfree(buf);
	return HPSA_VPD_LV_STATUS_UNSUPPORTED;
}

/* Determine offline status of a volume.
 * Return either:
 *  0 (not offline)
2944
 *  0xff (offline for unknown reasons)
2945 2946 2947
 *  # (integer code indicating one of several NOT READY states
 *     describing why a volume is to be kept offline)
 */
2948
static int hpsa_volume_offline(struct ctlr_info *h,
2949 2950 2951
					unsigned char scsi3addr[])
{
	struct CommandList *c;
2952 2953 2954
	unsigned char *sense;
	u8 sense_key, asc, ascq;
	int sense_len;
2955
	int rc, ldstat = 0;
2956 2957 2958 2959 2960 2961 2962 2963 2964 2965
	u16 cmd_status;
	u8 scsi_status;
#define ASC_LUN_NOT_READY 0x04
#define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
#define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02

	c = cmd_alloc(h);
	if (!c)
		return 0;
	(void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
2966 2967 2968 2969 2970
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
	if (rc) {
		cmd_free(h, c);
		return 0;
	}
2971
	sense = c->err_info->SenseInfo;
2972 2973 2974 2975 2976
	if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
		sense_len = sizeof(c->err_info->SenseInfo);
	else
		sense_len = c->err_info->SenseLen;
	decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015
	cmd_status = c->err_info->CommandStatus;
	scsi_status = c->err_info->ScsiStatus;
	cmd_free(h, c);
	/* Is the volume 'not ready'? */
	if (cmd_status != CMD_TARGET_STATUS ||
		scsi_status != SAM_STAT_CHECK_CONDITION ||
		sense_key != NOT_READY ||
		asc != ASC_LUN_NOT_READY)  {
		return 0;
	}

	/* Determine the reason for not ready state */
	ldstat = hpsa_get_volume_status(h, scsi3addr);

	/* Keep volume offline in certain cases: */
	switch (ldstat) {
	case HPSA_LV_UNDERGOING_ERASE:
	case HPSA_LV_UNDERGOING_RPI:
	case HPSA_LV_PENDING_RPI:
	case HPSA_LV_ENCRYPTED_NO_KEY:
	case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
	case HPSA_LV_UNDERGOING_ENCRYPTION:
	case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
	case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
		return ldstat;
	case HPSA_VPD_LV_STATUS_UNSUPPORTED:
		/* If VPD status page isn't available,
		 * use ASC/ASCQ to determine state
		 */
		if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
			(ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
			return ldstat;
		break;
	default:
		break;
	}
	return 0;
}

S
Stephen Cameron 已提交
3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051
/*
 * Find out if a logical device supports aborts by simply trying one.
 * Smart Array may claim not to support aborts on logical drives, but
 * if a MSA2000 * is connected, the drives on that will be presented
 * by the Smart Array as logical drives, and aborts may be sent to
 * those devices successfully.  So the simplest way to find out is
 * to simply try an abort and see how the device responds.
 */
static int hpsa_device_supports_aborts(struct ctlr_info *h,
					unsigned char *scsi3addr)
{
	struct CommandList *c;
	struct ErrorInfo *ei;
	int rc = 0;

	u64 tag = (u64) -1; /* bogus tag */

	/* Assume that physical devices support aborts */
	if (!is_logical_dev_addr_mode(scsi3addr))
		return 1;

	c = cmd_alloc(h);
	if (!c)
		return -ENOMEM;
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
	(void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
	/* no unmap needed here because no data xfer. */
	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_INVALID:
		rc = 0;
		break;
	case CMD_UNABORTABLE:
	case CMD_ABORT_FAILED:
		rc = 1;
		break;
3052 3053 3054
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
S
Stephen Cameron 已提交
3055 3056 3057 3058 3059 3060 3061 3062
	default:
		rc = 0;
		break;
	}
	cmd_free(h, c);
	return rc;
}

3063
static int hpsa_update_device_info(struct ctlr_info *h,
3064 3065
	unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
	unsigned char *is_OBDR_device)
3066
{
3067 3068 3069 3070 3071 3072

#define OBDR_SIG_OFFSET 43
#define OBDR_TAPE_SIG "$DR-10"
#define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
#define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)

3073
	unsigned char *inq_buff;
3074
	unsigned char *obdr_sig;
3075

3076
	inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100
	if (!inq_buff)
		goto bail_out;

	/* Do an inquiry to the device to see what it is. */
	if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
		(unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
		/* Inquiry failed (msg printed already) */
		dev_err(&h->pdev->dev,
			"hpsa_update_device_info: inquiry failed\n");
		goto bail_out;
	}

	this_device->devtype = (inq_buff[0] & 0x1f);
	memcpy(this_device->scsi3addr, scsi3addr, 8);
	memcpy(this_device->vendor, &inq_buff[8],
		sizeof(this_device->vendor));
	memcpy(this_device->model, &inq_buff[16],
		sizeof(this_device->model));
	memset(this_device->device_id, 0,
		sizeof(this_device->device_id));
	hpsa_get_device_id(h, scsi3addr, this_device->device_id,
		sizeof(this_device->device_id));

	if (this_device->devtype == TYPE_DISK &&
3101
		is_logical_dev_addr_mode(scsi3addr)) {
3102 3103
		int volume_offline;

3104
		hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3105 3106
		if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
			hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3107 3108 3109 3110
		volume_offline = hpsa_volume_offline(h, scsi3addr);
		if (volume_offline < 0 || volume_offline > 0xff)
			volume_offline = HPSA_VPD_LV_STATUS_UNSUPPORTED;
		this_device->volume_offline = volume_offline & 0xff;
3111
	} else {
3112
		this_device->raid_level = RAID_UNKNOWN;
3113 3114
		this_device->offload_config = 0;
		this_device->offload_enabled = 0;
3115
		this_device->offload_to_be_enabled = 0;
3116
		this_device->hba_ioaccel_enabled = 0;
3117
		this_device->volume_offline = 0;
3118
		this_device->queue_depth = h->nr_cmds;
3119
	}
3120

3121 3122 3123 3124 3125 3126 3127 3128 3129
	if (is_OBDR_device) {
		/* See if this is a One-Button-Disaster-Recovery device
		 * by looking for "$DR-10" at offset 43 in inquiry data.
		 */
		obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
		*is_OBDR_device = (this_device->devtype == TYPE_ROM &&
					strncmp(obdr_sig, OBDR_TAPE_SIG,
						OBDR_SIG_LEN) == 0);
	}
3130 3131 3132 3133 3134 3135 3136 3137
	kfree(inq_buff);
	return 0;

bail_out:
	kfree(inq_buff);
	return 1;
}

S
Stephen Cameron 已提交
3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162
static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
			struct hpsa_scsi_dev_t *dev, u8 *scsi3addr)
{
	unsigned long flags;
	int rc, entry;
	/*
	 * See if this device supports aborts.  If we already know
	 * the device, we already know if it supports aborts, otherwise
	 * we have to find out if it supports aborts by trying one.
	 */
	spin_lock_irqsave(&h->devlock, flags);
	rc = hpsa_scsi_find_entry(dev, h->dev, h->ndevices, &entry);
	if ((rc == DEVICE_SAME || rc == DEVICE_UPDATED) &&
		entry >= 0 && entry < h->ndevices) {
		dev->supports_aborts = h->dev[entry]->supports_aborts;
		spin_unlock_irqrestore(&h->devlock, flags);
	} else {
		spin_unlock_irqrestore(&h->devlock, flags);
		dev->supports_aborts =
				hpsa_device_supports_aborts(h, scsi3addr);
		if (dev->supports_aborts < 0)
			dev->supports_aborts = 0;
	}
}

3163
static unsigned char *ext_target_model[] = {
3164 3165 3166 3167
	"MSA2012",
	"MSA2024",
	"MSA2312",
	"MSA2324",
3168
	"P2000 G3 SAS",
3169
	"MSA 2040 SAS",
3170 3171 3172
	NULL,
};

3173
static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
3174 3175 3176
{
	int i;

3177 3178 3179
	for (i = 0; ext_target_model[i]; i++)
		if (strncmp(device->model, ext_target_model[i],
			strlen(ext_target_model[i])) == 0)
3180 3181 3182 3183 3184
			return 1;
	return 0;
}

/* Helper function to assign bus, target, lun mapping of devices.
3185
 * Puts non-external target logical volumes on bus 0, external target logical
3186 3187 3188 3189 3190 3191
 * volumes on bus 1, physical devices on bus 2. and the hba on bus 3.
 * Logical drive target and lun are assigned at this time, but
 * physical device lun and target assignment are deferred (assigned
 * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
 */
static void figure_bus_target_lun(struct ctlr_info *h,
3192
	u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
3193
{
3194 3195 3196 3197
	u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes));

	if (!is_logical_dev_addr_mode(lunaddrbytes)) {
		/* physical device, target and lun filled in later */
3198
		if (is_hba_lunid(lunaddrbytes))
3199
			hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff);
3200
		else
3201 3202 3203 3204 3205
			/* defer target, lun assignment for physical devices */
			hpsa_set_bus_target_lun(device, 2, -1, -1);
		return;
	}
	/* It's a logical device */
3206 3207
	if (is_ext_target(h, device)) {
		/* external target way, put logicals on bus 1
3208 3209 3210 3211 3212 3213
		 * and match target/lun numbers box
		 * reports, other smart array, bus 0, target 0, match lunid
		 */
		hpsa_set_bus_target_lun(device,
			1, (lunid >> 16) & 0x3fff, lunid & 0x00ff);
		return;
3214
	}
3215
	hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff);
3216 3217 3218 3219
}

/*
 * If there is no lun 0 on a target, linux won't find any devices.
3220
 * For the external targets (arrays), we have to manually detect the enclosure
3221 3222 3223 3224 3225 3226 3227 3228
 * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report
 * it for some reason.  *tmpdevice is the target we're adding,
 * this_device is a pointer into the current element of currentsd[]
 * that we're building up in update_scsi_devices(), below.
 * lunzerobits is a bitmap that tracks which targets already have a
 * lun 0 assigned.
 * Returns 1 if an enclosure was added, 0 if not.
 */
3229
static int add_ext_target_dev(struct ctlr_info *h,
3230
	struct hpsa_scsi_dev_t *tmpdevice,
3231
	struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes,
3232
	unsigned long lunzerobits[], int *n_ext_target_devs)
3233 3234 3235
{
	unsigned char scsi3addr[8];

3236
	if (test_bit(tmpdevice->target, lunzerobits))
3237 3238 3239 3240 3241
		return 0; /* There is already a lun 0 on this target. */

	if (!is_logical_dev_addr_mode(lunaddrbytes))
		return 0; /* It's the logical targets that may lack lun 0. */

3242 3243
	if (!is_ext_target(h, tmpdevice))
		return 0; /* Only external target devices have this problem. */
3244

3245
	if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */
3246 3247
		return 0;

3248
	memset(scsi3addr, 0, 8);
3249
	scsi3addr[3] = tmpdevice->target;
3250 3251 3252
	if (is_hba_lunid(scsi3addr))
		return 0; /* Don't add the RAID controller here. */

3253 3254 3255
	if (is_scsi_rev_5(h))
		return 0; /* p1210m doesn't need to do this. */

3256
	if (*n_ext_target_devs >= MAX_EXT_TARGETS) {
3257 3258
		dev_warn(&h->pdev->dev, "Maximum number of external "
			"target devices exceeded.  Check your hardware "
3259 3260 3261 3262
			"configuration.");
		return 0;
	}

3263
	if (hpsa_update_device_info(h, scsi3addr, this_device, NULL))
3264
		return 0;
3265
	(*n_ext_target_devs)++;
3266 3267
	hpsa_set_bus_target_lun(this_device,
				tmpdevice->bus, tmpdevice->target, 0);
S
Stephen Cameron 已提交
3268
	hpsa_update_device_supports_aborts(h, this_device, scsi3addr);
3269
	set_bit(tmpdevice->target, lunzerobits);
3270 3271 3272
	return 1;
}

3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283
/*
 * Get address of physical disk used for an ioaccel2 mode command:
 *	1. Extract ioaccel2 handle from the command.
 *	2. Find a matching ioaccel2 handle from list of physical disks.
 *	3. Return:
 *		1 and set scsi3addr to address of matching physical
 *		0 if no matching physical disk was found.
 */
static int hpsa_get_pdisk_of_ioaccel2(struct ctlr_info *h,
	struct CommandList *ioaccel2_cmd_to_abort, unsigned char *scsi3addr)
{
3284 3285 3286
	struct io_accel2_cmd *c2 =
			&h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
	unsigned long flags;
3287 3288
	int i;

3289 3290 3291 3292 3293 3294 3295 3296 3297 3298
	spin_lock_irqsave(&h->devlock, flags);
	for (i = 0; i < h->ndevices; i++)
		if (h->dev[i]->ioaccel_handle == le32_to_cpu(c2->scsi_nexus)) {
			memcpy(scsi3addr, h->dev[i]->scsi3addr,
				sizeof(h->dev[i]->scsi3addr));
			spin_unlock_irqrestore(&h->devlock, flags);
			return 1;
		}
	spin_unlock_irqrestore(&h->devlock, flags);
	return 0;
3299
}
3300

3301 3302 3303 3304 3305 3306 3307
/*
 * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
 * logdev.  The number of luns in physdev and logdev are returned in
 * *nphysicals and *nlogicals, respectively.
 * Returns 0 on success, -1 otherwise.
 */
static int hpsa_gather_lun_info(struct ctlr_info *h,
3308
	struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
3309
	struct ReportLUNdata *logdev, u32 *nlogicals)
3310
{
3311
	if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3312 3313 3314
		dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
		return -1;
	}
3315
	*nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
3316
	if (*nphysicals > HPSA_MAX_PHYS_LUN) {
3317 3318
		dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
			HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
3319 3320
		*nphysicals = HPSA_MAX_PHYS_LUN;
	}
3321
	if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
3322 3323 3324
		dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
		return -1;
	}
3325
	*nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343
	/* Reject Logicals in excess of our max capability. */
	if (*nlogicals > HPSA_MAX_LUN) {
		dev_warn(&h->pdev->dev,
			"maximum logical LUNs (%d) exceeded.  "
			"%d LUNs ignored.\n", HPSA_MAX_LUN,
			*nlogicals - HPSA_MAX_LUN);
			*nlogicals = HPSA_MAX_LUN;
	}
	if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
		dev_warn(&h->pdev->dev,
			"maximum logical + physical LUNs (%d) exceeded. "
			"%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
			*nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
		*nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
	}
	return 0;
}

D
Don Brace 已提交
3344 3345
static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
	int i, int nphysicals, int nlogicals,
3346
	struct ReportExtendedLUNdata *physdev_list,
3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360
	struct ReportLUNdata *logdev_list)
{
	/* Helper function, figure out where the LUN ID info is coming from
	 * given index i, lists of physical and logical devices, where in
	 * the list the raid controller is supposed to appear (first or last)
	 */

	int logicals_start = nphysicals + (raid_ctlr_position == 0);
	int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);

	if (i == raid_ctlr_position)
		return RAID_CTLR_LUNID;

	if (i < logicals_start)
3361 3362
		return &physdev_list->LUN[i -
				(raid_ctlr_position == 0)].lunid[0];
3363 3364 3365 3366 3367 3368 3369 3370

	if (i < last_device)
		return &logdev_list->LUN[i - nphysicals -
			(raid_ctlr_position == 0)][0];
	BUG();
	return NULL;
}

3371 3372 3373
static int hpsa_hba_mode_enabled(struct ctlr_info *h)
{
	int rc;
3374
	int hba_mode_enabled;
3375 3376 3377 3378 3379
	struct bmic_controller_parameters *ctlr_params;
	ctlr_params = kzalloc(sizeof(struct bmic_controller_parameters),
		GFP_KERNEL);

	if (!ctlr_params)
3380
		return -ENOMEM;
3381 3382
	rc = hpsa_bmic_ctrl_mode_sense(h, RAID_CTLR_LUNID, 0, ctlr_params,
		sizeof(struct bmic_controller_parameters));
3383
	if (rc) {
3384
		kfree(ctlr_params);
3385
		return rc;
3386
	}
3387 3388 3389 3390 3391

	hba_mode_enabled =
		((ctlr_params->nvram_flags & HBA_MODE_ENABLED_FLAG) != 0);
	kfree(ctlr_params);
	return hba_mode_enabled;
3392 3393
}

3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404
/* get physical drive ioaccel handle and queue depth */
static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
		struct hpsa_scsi_dev_t *dev,
		u8 *lunaddrbytes,
		struct bmic_identify_physical_device *id_phys)
{
	int rc;
	struct ext_report_lun_entry *rle =
		(struct ext_report_lun_entry *) lunaddrbytes;

	dev->ioaccel_handle = rle->ioaccel_handle;
3405 3406
	if (PHYS_IOACCEL(lunaddrbytes) && dev->ioaccel_handle)
		dev->hba_ioaccel_enabled = 1;
3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422
	memset(id_phys, 0, sizeof(*id_phys));
	rc = hpsa_bmic_id_physical_device(h, lunaddrbytes,
			GET_BMIC_DRIVE_NUMBER(lunaddrbytes), id_phys,
			sizeof(*id_phys));
	if (!rc)
		/* Reserve space for FW operations */
#define DRIVE_CMDS_RESERVED_FOR_FW 2
#define DRIVE_QUEUE_DEPTH 7
		dev->queue_depth =
			le16_to_cpu(id_phys->current_queue_depth_limit) -
				DRIVE_CMDS_RESERVED_FOR_FW;
	else
		dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
	atomic_set(&dev->ioaccel_cmds_out, 0);
}

3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434
static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
{
	/* the idea here is we could get notified
	 * that some devices have changed, so we do a report
	 * physical luns and report logical luns cmd, and adjust
	 * our list of devices accordingly.
	 *
	 * The scsi3addr's of devices won't change so long as the
	 * adapter is not reset.  That means we can rescan and
	 * tell which devices we already know about, vs. new
	 * devices, vs.  disappearing devices.
	 */
3435
	struct ReportExtendedLUNdata *physdev_list = NULL;
3436
	struct ReportLUNdata *logdev_list = NULL;
3437
	struct bmic_identify_physical_device *id_phys = NULL;
3438 3439 3440
	u32 nphysicals = 0;
	u32 nlogicals = 0;
	u32 ndev_allocated = 0;
3441 3442
	struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
	int ncurrent = 0;
3443
	int i, n_ext_target_devs, ndevs_to_allocate;
3444
	int raid_ctlr_position;
3445
	int rescan_hba_mode;
3446
	DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
3447

3448
	currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
3449 3450
	physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
	logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
3451
	tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
3452
	id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3453

3454 3455
	if (!currentsd || !physdev_list || !logdev_list ||
		!tmpdevice || !id_phys) {
3456 3457 3458 3459 3460
		dev_err(&h->pdev->dev, "out of memory\n");
		goto out;
	}
	memset(lunzerobits, 0, sizeof(lunzerobits));

3461
	rescan_hba_mode = hpsa_hba_mode_enabled(h);
3462 3463
	if (rescan_hba_mode < 0)
		goto out;
3464 3465 3466 3467 3468 3469 3470 3471

	if (!h->hba_mode_enabled && rescan_hba_mode)
		dev_warn(&h->pdev->dev, "HBA mode enabled\n");
	else if (h->hba_mode_enabled && !rescan_hba_mode)
		dev_warn(&h->pdev->dev, "HBA mode disabled\n");

	h->hba_mode_enabled = rescan_hba_mode;

3472 3473
	if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
			logdev_list, &nlogicals))
3474 3475
		goto out;

3476 3477 3478
	/* We might see up to the maximum number of logical and physical disks
	 * plus external target devices, and a device for the local RAID
	 * controller.
3479
	 */
3480
	ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
3481 3482 3483

	/* Allocate the per device structures */
	for (i = 0; i < ndevs_to_allocate; i++) {
3484 3485 3486 3487 3488 3489 3490
		if (i >= HPSA_MAX_DEVICES) {
			dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
				"  %d devices ignored.\n", HPSA_MAX_DEVICES,
				ndevs_to_allocate - HPSA_MAX_DEVICES);
			break;
		}

3491 3492 3493 3494 3495 3496 3497 3498 3499
		currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
		if (!currentsd[i]) {
			dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
				__FILE__, __LINE__);
			goto out;
		}
		ndev_allocated++;
	}

3500
	if (is_scsi_rev_5(h))
3501 3502 3503 3504
		raid_ctlr_position = 0;
	else
		raid_ctlr_position = nphysicals + nlogicals;

3505
	/* adjust our table of devices */
3506
	n_ext_target_devs = 0;
3507
	for (i = 0; i < nphysicals + nlogicals + 1; i++) {
3508
		u8 *lunaddrbytes, is_OBDR = 0;
3509 3510

		/* Figure out where the LUN ID info is coming from */
3511 3512
		lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
			i, nphysicals, nlogicals, physdev_list, logdev_list);
3513 3514 3515 3516 3517 3518

		/* skip masked non-disk devices */
		if (MASKED_DEVICE(lunaddrbytes))
			if (i < nphysicals + (raid_ctlr_position == 0) &&
				NON_DISK_PHYS_DEV(lunaddrbytes))
				continue;
3519 3520

		/* Get device type, vendor, model, device id */
3521 3522
		if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
							&is_OBDR))
3523
			continue; /* skip it if we can't talk to it. */
3524
		figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
S
Stephen Cameron 已提交
3525
		hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
3526 3527 3528
		this_device = currentsd[ncurrent];

		/*
3529
		 * For external target devices, we have to insert a LUN 0 which
3530 3531 3532 3533 3534
		 * doesn't show up in CCISS_REPORT_PHYSICAL data, but there
		 * is nonetheless an enclosure device there.  We have to
		 * present that otherwise linux won't find anything if
		 * there is no lun 0.
		 */
3535
		if (add_ext_target_dev(h, tmpdevice, this_device,
3536
				lunaddrbytes, lunzerobits,
3537
				&n_ext_target_devs)) {
3538 3539 3540 3541 3542 3543
			ncurrent++;
			this_device = currentsd[ncurrent];
		}

		*this_device = *tmpdevice;

3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555
		/* do not expose masked devices */
		if (MASKED_DEVICE(lunaddrbytes) &&
			i < nphysicals + (raid_ctlr_position == 0)) {
			if (h->hba_mode_enabled)
				dev_warn(&h->pdev->dev,
					"Masked physical device detected\n");
			this_device->expose_state = HPSA_DO_NOT_EXPOSE;
		} else {
			this_device->expose_state =
					HPSA_SG_ATTACH | HPSA_ULD_ATTACH;
		}

3556
		switch (this_device->devtype) {
3557
		case TYPE_ROM:
3558 3559 3560 3561 3562 3563 3564
			/* We don't *really* support actual CD-ROM devices,
			 * just "One Button Disaster Recovery" tape drive
			 * which temporarily pretends to be a CD-ROM drive.
			 * So we check that the device is really an OBDR tape
			 * device by checking for "$DR-10" in bytes 43-48 of
			 * the inquiry data.
			 */
3565 3566
			if (is_OBDR)
				ncurrent++;
3567 3568
			break;
		case TYPE_DISK:
3569
			if (i >= nphysicals) {
3570 3571
				ncurrent++;
				break;
3572
			}
3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584

			if (h->hba_mode_enabled)
				/* never use raid mapper in HBA mode */
				this_device->offload_enabled = 0;
			else if (!(h->transMethod & CFGTBL_Trans_io_accel1 ||
				h->transMethod & CFGTBL_Trans_io_accel2))
				break;

			hpsa_get_ioaccel_drive_info(h, this_device,
						lunaddrbytes, id_phys);
			atomic_set(&this_device->ioaccel_cmds_out, 0);
			ncurrent++;
3585 3586 3587 3588 3589
			break;
		case TYPE_TAPE:
		case TYPE_MEDIUM_CHANGER:
			ncurrent++;
			break;
3590 3591 3592 3593
		case TYPE_ENCLOSURE:
			if (h->hba_mode_enabled)
				ncurrent++;
			break;
3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606
		case TYPE_RAID:
			/* Only present the Smartarray HBA as a RAID controller.
			 * If it's a RAID controller other than the HBA itself
			 * (an external RAID controller, MSA500 or similar)
			 * don't present it.
			 */
			if (!is_hba_lunid(lunaddrbytes))
				break;
			ncurrent++;
			break;
		default:
			break;
		}
3607
		if (ncurrent >= HPSA_MAX_DEVICES)
3608 3609 3610 3611 3612 3613 3614 3615 3616 3617
			break;
	}
	adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent);
out:
	kfree(tmpdevice);
	for (i = 0; i < ndev_allocated; i++)
		kfree(currentsd[i]);
	kfree(currentsd);
	kfree(physdev_list);
	kfree(logdev_list);
3618
	kfree(id_phys);
3619 3620
}

3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631
static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
				   struct scatterlist *sg)
{
	u64 addr64 = (u64) sg_dma_address(sg);
	unsigned int len = sg_dma_len(sg);

	desc->Addr = cpu_to_le64(addr64);
	desc->Len = cpu_to_le32(len);
	desc->Ext = 0;
}

3632 3633
/*
 * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
3634 3635 3636
 * dma mapping  and fills in the scatter gather entries of the
 * hpsa command, cp.
 */
3637
static int hpsa_scatter_gather(struct ctlr_info *h,
3638 3639 3640 3641
		struct CommandList *cp,
		struct scsi_cmnd *cmd)
{
	struct scatterlist *sg;
3642 3643
	int use_sg, i, sg_index, chained;
	struct SGDescriptor *curr_sg;
3644

3645
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
3646 3647 3648 3649 3650 3651 3652 3653

	use_sg = scsi_dma_map(cmd);
	if (use_sg < 0)
		return use_sg;

	if (!use_sg)
		goto sglist_finished;

3654 3655 3656
	curr_sg = cp->SG;
	chained = 0;
	sg_index = 0;
3657
	scsi_for_each_sg(cmd, sg, use_sg, i) {
3658 3659 3660 3661 3662 3663
		if (i == h->max_cmd_sg_entries - 1 &&
			use_sg > h->max_cmd_sg_entries) {
			chained = 1;
			curr_sg = h->cmd_sg_list[cp->cmdindex];
			sg_index = 0;
		}
3664
		hpsa_set_sg_descriptor(curr_sg, sg);
3665 3666
		curr_sg++;
	}
3667 3668

	/* Back the pointer up to the last entry and mark it as "last". */
3669
	(--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
3670 3671 3672 3673 3674 3675

	if (use_sg + chained > h->maxSG)
		h->maxSG = use_sg + chained;

	if (chained) {
		cp->Header.SGList = h->max_cmd_sg_entries;
3676
		cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
3677 3678 3679 3680
		if (hpsa_map_sg_chain_block(h, cp)) {
			scsi_dma_unmap(cmd);
			return -1;
		}
3681
		return 0;
3682 3683 3684 3685
	}

sglist_finished:

3686
	cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
3687
	cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
3688 3689 3690
	return 0;
}

3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738
#define IO_ACCEL_INELIGIBLE (1)
static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
{
	int is_write = 0;
	u32 block;
	u32 block_cnt;

	/* Perform some CDB fixups if needed using 10 byte reads/writes only */
	switch (cdb[0]) {
	case WRITE_6:
	case WRITE_12:
		is_write = 1;
	case READ_6:
	case READ_12:
		if (*cdb_len == 6) {
			block = (((u32) cdb[2]) << 8) | cdb[3];
			block_cnt = cdb[4];
		} else {
			BUG_ON(*cdb_len != 12);
			block = (((u32) cdb[2]) << 24) |
				(((u32) cdb[3]) << 16) |
				(((u32) cdb[4]) << 8) |
				cdb[5];
			block_cnt =
				(((u32) cdb[6]) << 24) |
				(((u32) cdb[7]) << 16) |
				(((u32) cdb[8]) << 8) |
				cdb[9];
		}
		if (block_cnt > 0xffff)
			return IO_ACCEL_INELIGIBLE;

		cdb[0] = is_write ? WRITE_10 : READ_10;
		cdb[1] = 0;
		cdb[2] = (u8) (block >> 24);
		cdb[3] = (u8) (block >> 16);
		cdb[4] = (u8) (block >> 8);
		cdb[5] = (u8) (block);
		cdb[6] = 0;
		cdb[7] = (u8) (block_cnt >> 8);
		cdb[8] = (u8) (block_cnt);
		cdb[9] = 0;
		*cdb_len = 10;
		break;
	}
	return 0;
}

3739
static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
3740
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
3741
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
	unsigned int len;
	unsigned int total_len = 0;
	struct scatterlist *sg;
	u64 addr64;
	int use_sg, i;
	struct SGDescriptor *curr_sg;
	u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;

3753
	/* TODO: implement chaining support */
3754 3755
	if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
3756
		return IO_ACCEL_INELIGIBLE;
3757
	}
3758

3759 3760
	BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);

3761 3762
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
3763
		return IO_ACCEL_INELIGIBLE;
3764
	}
3765

3766 3767 3768 3769 3770 3771 3772 3773
	c->cmd_type = CMD_IOACCEL1;

	/* Adjust the DMA address to point to the accelerated command buffer */
	c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
				(c->cmdindex * sizeof(*cp));
	BUG_ON(c->busaddr & 0x0000007F);

	use_sg = scsi_dma_map(cmd);
3774 3775
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
3776
		return use_sg;
3777
	}
3778 3779 3780 3781 3782 3783 3784

	if (use_sg) {
		curr_sg = cp->SG;
		scsi_for_each_sg(cmd, sg, use_sg, i) {
			addr64 = (u64) sg_dma_address(sg);
			len  = sg_dma_len(sg);
			total_len += len;
3785 3786 3787
			curr_sg->Addr = cpu_to_le64(addr64);
			curr_sg->Len = cpu_to_le32(len);
			curr_sg->Ext = cpu_to_le32(0);
3788 3789
			curr_sg++;
		}
3790
		(--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811

		switch (cmd->sc_data_direction) {
		case DMA_TO_DEVICE:
			control |= IOACCEL1_CONTROL_DATA_OUT;
			break;
		case DMA_FROM_DEVICE:
			control |= IOACCEL1_CONTROL_DATA_IN;
			break;
		case DMA_NONE:
			control |= IOACCEL1_CONTROL_NODATAXFER;
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
			cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
		control |= IOACCEL1_CONTROL_NODATAXFER;
	}

3812
	c->Header.SGList = use_sg;
3813
	/* Fill out the command structure to submit */
D
Don Brace 已提交
3814 3815 3816 3817 3818
	cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
	cp->transfer_len = cpu_to_le32(total_len);
	cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
			(cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
	cp->control = cpu_to_le32(control);
3819 3820
	memcpy(cp->CDB, cdb, cdb_len);
	memcpy(cp->CISS_LUN, scsi3addr, 8);
3821
	/* Tag was already set at init time. */
3822
	enqueue_cmd_and_start_io(h, c);
3823 3824
	return 0;
}
3825

3826 3827 3828 3829 3830 3831 3832 3833 3834 3835
/*
 * Queue a command directly to a device behind the controller using the
 * I/O accelerator path.
 */
static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
	struct CommandList *c)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;

3836 3837
	c->phys_disk = dev;

3838
	return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
3839
		cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
3840 3841
}

3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853
/*
 * Set encryption parameters for the ioaccel2 request
 */
static void set_encrypt_ioaccel2(struct ctlr_info *h,
	struct CommandList *c, struct io_accel2_cmd *cp)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	struct raid_map_data *map = &dev->raid_map;
	u64 first_block;

	/* Are we doing encryption on this device */
D
Don Brace 已提交
3854
	if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869
		return;
	/* Set the data encryption key index. */
	cp->dekindex = map->dekindex;

	/* Set the encryption enable flag, encoded into direction field. */
	cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;

	/* Set encryption tweak values based on logical block address
	 * If block size is 512, tweak value is LBA.
	 * For other block sizes, tweak is (LBA * block size)/ 512)
	 */
	switch (cmd->cmnd[0]) {
	/* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
	case WRITE_6:
	case READ_6:
D
Don Brace 已提交
3870
		first_block = get_unaligned_be16(&cmd->cmnd[2]);
3871 3872 3873 3874 3875 3876
		break;
	case WRITE_10:
	case READ_10:
	/* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
	case WRITE_12:
	case READ_12:
D
Don Brace 已提交
3877
		first_block = get_unaligned_be32(&cmd->cmnd[2]);
3878 3879 3880
		break;
	case WRITE_16:
	case READ_16:
D
Don Brace 已提交
3881
		first_block = get_unaligned_be64(&cmd->cmnd[2]);
3882 3883 3884
		break;
	default:
		dev_err(&h->pdev->dev,
D
Don Brace 已提交
3885 3886
			"ERROR: %s: size (0x%x) not supported for encryption\n",
			__func__, cmd->cmnd[0]);
3887 3888 3889
		BUG();
		break;
	}
D
Don Brace 已提交
3890 3891 3892 3893 3894 3895 3896

	if (le32_to_cpu(map->volume_blk_size) != 512)
		first_block = first_block *
				le32_to_cpu(map->volume_blk_size)/512;

	cp->tweak_lower = cpu_to_le32(first_block);
	cp->tweak_upper = cpu_to_le32(first_block >> 32);
3897 3898
}

3899 3900
static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
3901
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
3902 3903 3904 3905 3906 3907 3908 3909 3910 3911
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
	struct ioaccel2_sg_element *curr_sg;
	int use_sg, i;
	struct scatterlist *sg;
	u64 addr64;
	u32 len;
	u32 total_len = 0;

3912
	BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
3913

3914 3915
	if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
3916
		return IO_ACCEL_INELIGIBLE;
3917 3918
	}

3919 3920 3921 3922 3923 3924 3925 3926 3927 3928
	c->cmd_type = CMD_IOACCEL2;
	/* Adjust the DMA address to point to the accelerated command buffer */
	c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
				(c->cmdindex * sizeof(*cp));
	BUG_ON(c->busaddr & 0x0000007F);

	memset(cp, 0, sizeof(*cp));
	cp->IU_type = IOACCEL2_IU_TYPE;

	use_sg = scsi_dma_map(cmd);
3929 3930
	if (use_sg < 0) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
3931
		return use_sg;
3932
	}
3933 3934 3935

	if (use_sg) {
		curr_sg = cp->sg;
3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947
		if (use_sg > h->ioaccel_maxsg) {
			addr64 = le64_to_cpu(
				h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
			curr_sg->address = cpu_to_le64(addr64);
			curr_sg->length = 0;
			curr_sg->reserved[0] = 0;
			curr_sg->reserved[1] = 0;
			curr_sg->reserved[2] = 0;
			curr_sg->chain_indicator = 0x80;

			curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
		}
3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962
		scsi_for_each_sg(cmd, sg, use_sg, i) {
			addr64 = (u64) sg_dma_address(sg);
			len  = sg_dma_len(sg);
			total_len += len;
			curr_sg->address = cpu_to_le64(addr64);
			curr_sg->length = cpu_to_le32(len);
			curr_sg->reserved[0] = 0;
			curr_sg->reserved[1] = 0;
			curr_sg->reserved[2] = 0;
			curr_sg->chain_indicator = 0;
			curr_sg++;
		}

		switch (cmd->sc_data_direction) {
		case DMA_TO_DEVICE:
3963 3964
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_OUT;
3965 3966
			break;
		case DMA_FROM_DEVICE:
3967 3968
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_DATA_IN;
3969 3970
			break;
		case DMA_NONE:
3971 3972
			cp->direction &= ~IOACCEL2_DIRECTION_MASK;
			cp->direction |= IOACCEL2_DIR_NO_DATA;
3973 3974 3975 3976 3977 3978 3979 3980
			break;
		default:
			dev_err(&h->pdev->dev, "unknown data direction: %d\n",
				cmd->sc_data_direction);
			BUG();
			break;
		}
	} else {
3981 3982
		cp->direction &= ~IOACCEL2_DIRECTION_MASK;
		cp->direction |= IOACCEL2_DIR_NO_DATA;
3983
	}
3984 3985 3986 3987

	/* Set encryption parameters, if necessary */
	set_encrypt_ioaccel2(h, c, cp);

D
Don Brace 已提交
3988
	cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
3989
	cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
3990 3991 3992 3993 3994
	memcpy(cp->cdb, cdb, sizeof(cp->cdb));

	cp->data_len = cpu_to_le32(total_len);
	cp->err_ptr = cpu_to_le64(c->busaddr +
			offsetof(struct io_accel2_cmd, error_data));
3995
	cp->err_len = cpu_to_le32(sizeof(cp->error_data));
3996

3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007
	/* fill in sg elements */
	if (use_sg > h->ioaccel_maxsg) {
		cp->sg_count = 1;
		if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
			atomic_dec(&phys_disk->ioaccel_cmds_out);
			scsi_dma_unmap(cmd);
			return -1;
		}
	} else
		cp->sg_count = (u8) use_sg;

4008 4009 4010 4011 4012 4013 4014 4015 4016
	enqueue_cmd_and_start_io(h, c);
	return 0;
}

/*
 * Queue a command to the correct I/O accelerator path.
 */
static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
	struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4017
	u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4018
{
4019 4020 4021 4022 4023 4024
	/* Try to honor the device's queue depth */
	if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
					phys_disk->queue_depth) {
		atomic_dec(&phys_disk->ioaccel_cmds_out);
		return IO_ACCEL_INELIGIBLE;
	}
4025 4026
	if (h->transMethod & CFGTBL_Trans_io_accel1)
		return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
4027 4028
						cdb, cdb_len, scsi3addr,
						phys_disk);
4029 4030
	else
		return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
4031 4032
						cdb, cdb_len, scsi3addr,
						phys_disk);
4033 4034
}

4035 4036 4037 4038 4039
static void raid_map_helper(struct raid_map_data *map,
		int offload_to_mirror, u32 *map_index, u32 *current_group)
{
	if (offload_to_mirror == 0)  {
		/* use physical disk in the first mirrored group. */
D
Don Brace 已提交
4040
		*map_index %= le16_to_cpu(map->data_disks_per_row);
4041 4042 4043 4044
		return;
	}
	do {
		/* determine mirror group that *map_index indicates */
D
Don Brace 已提交
4045 4046
		*current_group = *map_index /
			le16_to_cpu(map->data_disks_per_row);
4047 4048
		if (offload_to_mirror == *current_group)
			continue;
D
Don Brace 已提交
4049
		if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
4050
			/* select map index from next group */
D
Don Brace 已提交
4051
			*map_index += le16_to_cpu(map->data_disks_per_row);
4052 4053 4054
			(*current_group)++;
		} else {
			/* select map index from first group */
D
Don Brace 已提交
4055
			*map_index %= le16_to_cpu(map->data_disks_per_row);
4056 4057 4058 4059 4060
			*current_group = 0;
		}
	} while (offload_to_mirror != *current_group);
}

4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078
/*
 * Attempt to perform offload RAID mapping for a logical volume I/O.
 */
static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
	struct CommandList *c)
{
	struct scsi_cmnd *cmd = c->scsi_cmd;
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	struct raid_map_data *map = &dev->raid_map;
	struct raid_map_disk_data *dd = &map->data[0];
	int is_write = 0;
	u32 map_index;
	u64 first_block, last_block;
	u32 block_cnt;
	u32 blocks_per_row;
	u64 first_row, last_row;
	u32 first_row_offset, last_row_offset;
	u32 first_column, last_column;
4079 4080 4081 4082 4083 4084 4085 4086
	u64 r0_first_row, r0_last_row;
	u32 r5or6_blocks_per_row;
	u64 r5or6_first_row, r5or6_last_row;
	u32 r5or6_first_row_offset, r5or6_last_row_offset;
	u32 r5or6_first_column, r5or6_last_column;
	u32 total_disks_per_row;
	u32 stripesize;
	u32 first_group, last_group, current_group;
4087 4088 4089 4090 4091 4092
	u32 map_row;
	u32 disk_handle;
	u64 disk_block;
	u32 disk_block_cnt;
	u8 cdb[16];
	u8 cdb_len;
D
Don Brace 已提交
4093
	u16 strip_size;
4094 4095 4096
#if BITS_PER_LONG == 32
	u64 tmpdiv;
#endif
4097
	int offload_to_mirror;
4098 4099 4100 4101 4102 4103 4104 4105 4106 4107

	/* check for valid opcode, get LBA and block count */
	switch (cmd->cmnd[0]) {
	case WRITE_6:
		is_write = 1;
	case READ_6:
		first_block =
			(((u64) cmd->cmnd[2]) << 8) |
			cmd->cmnd[3];
		block_cnt = cmd->cmnd[4];
4108 4109
		if (block_cnt == 0)
			block_cnt = 256;
4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164
		break;
	case WRITE_10:
		is_write = 1;
	case READ_10:
		first_block =
			(((u64) cmd->cmnd[2]) << 24) |
			(((u64) cmd->cmnd[3]) << 16) |
			(((u64) cmd->cmnd[4]) << 8) |
			cmd->cmnd[5];
		block_cnt =
			(((u32) cmd->cmnd[7]) << 8) |
			cmd->cmnd[8];
		break;
	case WRITE_12:
		is_write = 1;
	case READ_12:
		first_block =
			(((u64) cmd->cmnd[2]) << 24) |
			(((u64) cmd->cmnd[3]) << 16) |
			(((u64) cmd->cmnd[4]) << 8) |
			cmd->cmnd[5];
		block_cnt =
			(((u32) cmd->cmnd[6]) << 24) |
			(((u32) cmd->cmnd[7]) << 16) |
			(((u32) cmd->cmnd[8]) << 8) |
		cmd->cmnd[9];
		break;
	case WRITE_16:
		is_write = 1;
	case READ_16:
		first_block =
			(((u64) cmd->cmnd[2]) << 56) |
			(((u64) cmd->cmnd[3]) << 48) |
			(((u64) cmd->cmnd[4]) << 40) |
			(((u64) cmd->cmnd[5]) << 32) |
			(((u64) cmd->cmnd[6]) << 24) |
			(((u64) cmd->cmnd[7]) << 16) |
			(((u64) cmd->cmnd[8]) << 8) |
			cmd->cmnd[9];
		block_cnt =
			(((u32) cmd->cmnd[10]) << 24) |
			(((u32) cmd->cmnd[11]) << 16) |
			(((u32) cmd->cmnd[12]) << 8) |
			cmd->cmnd[13];
		break;
	default:
		return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
	}
	last_block = first_block + block_cnt - 1;

	/* check for write to non-RAID-0 */
	if (is_write && dev->raid_level != 0)
		return IO_ACCEL_INELIGIBLE;

	/* check for invalid block or wraparound */
D
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4165 4166
	if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
		last_block < first_block)
4167 4168 4169
		return IO_ACCEL_INELIGIBLE;

	/* calculate stripe information for the request */
D
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4170 4171 4172
	blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
				le16_to_cpu(map->strip_size);
	strip_size = le16_to_cpu(map->strip_size);
4173 4174 4175 4176 4177 4178 4179 4180 4181 4182
#if BITS_PER_LONG == 32
	tmpdiv = first_block;
	(void) do_div(tmpdiv, blocks_per_row);
	first_row = tmpdiv;
	tmpdiv = last_block;
	(void) do_div(tmpdiv, blocks_per_row);
	last_row = tmpdiv;
	first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
	last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
	tmpdiv = first_row_offset;
D
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4183
	(void) do_div(tmpdiv, strip_size);
4184 4185
	first_column = tmpdiv;
	tmpdiv = last_row_offset;
D
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4186
	(void) do_div(tmpdiv, strip_size);
4187 4188 4189 4190 4191 4192
	last_column = tmpdiv;
#else
	first_row = first_block / blocks_per_row;
	last_row = last_block / blocks_per_row;
	first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
	last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
D
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4193 4194
	first_column = first_row_offset / strip_size;
	last_column = last_row_offset / strip_size;
4195 4196 4197 4198 4199 4200 4201
#endif

	/* if this isn't a single row/column then give to the controller */
	if ((first_row != last_row) || (first_column != last_column))
		return IO_ACCEL_INELIGIBLE;

	/* proceeding with driver mapping */
D
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4202 4203
	total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
				le16_to_cpu(map->metadata_disks_per_row);
4204
	map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
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4205
				le16_to_cpu(map->row_cnt);
4206 4207 4208 4209 4210 4211 4212 4213 4214
	map_index = (map_row * total_disks_per_row) + first_column;

	switch (dev->raid_level) {
	case HPSA_RAID_0:
		break; /* nothing special to do */
	case HPSA_RAID_1:
		/* Handles load balance across RAID 1 members.
		 * (2-drive R1 and R10 with even # of drives.)
		 * Appropriate for SSDs, not optimal for HDDs
4215
		 */
D
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4216
		BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
4217
		if (dev->offload_to_mirror)
D
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4218
			map_index += le16_to_cpu(map->data_disks_per_row);
4219
		dev->offload_to_mirror = !dev->offload_to_mirror;
4220 4221 4222 4223 4224
		break;
	case HPSA_RAID_ADM:
		/* Handles N-way mirrors  (R1-ADM)
		 * and R10 with # of drives divisible by 3.)
		 */
D
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4225
		BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
4226 4227 4228 4229 4230 4231

		offload_to_mirror = dev->offload_to_mirror;
		raid_map_helper(map, offload_to_mirror,
				&map_index, &current_group);
		/* set mirror group to use next time */
		offload_to_mirror =
D
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4232 4233
			(offload_to_mirror >=
			le16_to_cpu(map->layout_map_count) - 1)
4234 4235 4236 4237 4238 4239 4240 4241 4242
			? 0 : offload_to_mirror + 1;
		dev->offload_to_mirror = offload_to_mirror;
		/* Avoid direct use of dev->offload_to_mirror within this
		 * function since multiple threads might simultaneously
		 * increment it beyond the range of dev->layout_map_count -1.
		 */
		break;
	case HPSA_RAID_5:
	case HPSA_RAID_6:
D
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4243
		if (le16_to_cpu(map->layout_map_count) <= 1)
4244 4245 4246 4247
			break;

		/* Verify first and last block are in same RAID group */
		r5or6_blocks_per_row =
D
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4248 4249
			le16_to_cpu(map->strip_size) *
			le16_to_cpu(map->data_disks_per_row);
4250
		BUG_ON(r5or6_blocks_per_row == 0);
D
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4251 4252
		stripesize = r5or6_blocks_per_row *
			le16_to_cpu(map->layout_map_count);
4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		first_group = do_div(tmpdiv, stripesize);
		tmpdiv = first_group;
		(void) do_div(tmpdiv, r5or6_blocks_per_row);
		first_group = tmpdiv;
		tmpdiv = last_block;
		last_group = do_div(tmpdiv, stripesize);
		tmpdiv = last_group;
		(void) do_div(tmpdiv, r5or6_blocks_per_row);
		last_group = tmpdiv;
#else
		first_group = (first_block % stripesize) / r5or6_blocks_per_row;
		last_group = (last_block % stripesize) / r5or6_blocks_per_row;
#endif
4268
		if (first_group != last_group)
4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314
			return IO_ACCEL_INELIGIBLE;

		/* Verify request is in a single row of RAID 5/6 */
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		(void) do_div(tmpdiv, stripesize);
		first_row = r5or6_first_row = r0_first_row = tmpdiv;
		tmpdiv = last_block;
		(void) do_div(tmpdiv, stripesize);
		r5or6_last_row = r0_last_row = tmpdiv;
#else
		first_row = r5or6_first_row = r0_first_row =
						first_block / stripesize;
		r5or6_last_row = r0_last_row = last_block / stripesize;
#endif
		if (r5or6_first_row != r5or6_last_row)
			return IO_ACCEL_INELIGIBLE;


		/* Verify request is in a single column */
#if BITS_PER_LONG == 32
		tmpdiv = first_block;
		first_row_offset = do_div(tmpdiv, stripesize);
		tmpdiv = first_row_offset;
		first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
		r5or6_first_row_offset = first_row_offset;
		tmpdiv = last_block;
		r5or6_last_row_offset = do_div(tmpdiv, stripesize);
		tmpdiv = r5or6_last_row_offset;
		r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
		tmpdiv = r5or6_first_row_offset;
		(void) do_div(tmpdiv, map->strip_size);
		first_column = r5or6_first_column = tmpdiv;
		tmpdiv = r5or6_last_row_offset;
		(void) do_div(tmpdiv, map->strip_size);
		r5or6_last_column = tmpdiv;
#else
		first_row_offset = r5or6_first_row_offset =
			(u32)((first_block % stripesize) %
						r5or6_blocks_per_row);

		r5or6_last_row_offset =
			(u32)((last_block % stripesize) %
						r5or6_blocks_per_row);

		first_column = r5or6_first_column =
D
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4315
			r5or6_first_row_offset / le16_to_cpu(map->strip_size);
4316
		r5or6_last_column =
D
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4317
			r5or6_last_row_offset / le16_to_cpu(map->strip_size);
4318 4319 4320 4321 4322 4323
#endif
		if (r5or6_first_column != r5or6_last_column)
			return IO_ACCEL_INELIGIBLE;

		/* Request is eligible */
		map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
D
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4324
			le16_to_cpu(map->row_cnt);
4325 4326

		map_index = (first_group *
D
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4327
			(le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
4328 4329 4330 4331
			(map_row * total_disks_per_row) + first_column;
		break;
	default:
		return IO_ACCEL_INELIGIBLE;
4332
	}
4333

4334 4335 4336
	if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
		return IO_ACCEL_INELIGIBLE;

4337 4338
	c->phys_disk = dev->phys_disk[map_index];

4339
	disk_handle = dd[map_index].ioaccel_handle;
D
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4340 4341 4342 4343
	disk_block = le64_to_cpu(map->disk_starting_blk) +
			first_row * le16_to_cpu(map->strip_size) +
			(first_row_offset - first_column *
			le16_to_cpu(map->strip_size));
4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385
	disk_block_cnt = block_cnt;

	/* handle differing logical/physical block sizes */
	if (map->phys_blk_shift) {
		disk_block <<= map->phys_blk_shift;
		disk_block_cnt <<= map->phys_blk_shift;
	}
	BUG_ON(disk_block_cnt > 0xffff);

	/* build the new CDB for the physical disk I/O */
	if (disk_block > 0xffffffff) {
		cdb[0] = is_write ? WRITE_16 : READ_16;
		cdb[1] = 0;
		cdb[2] = (u8) (disk_block >> 56);
		cdb[3] = (u8) (disk_block >> 48);
		cdb[4] = (u8) (disk_block >> 40);
		cdb[5] = (u8) (disk_block >> 32);
		cdb[6] = (u8) (disk_block >> 24);
		cdb[7] = (u8) (disk_block >> 16);
		cdb[8] = (u8) (disk_block >> 8);
		cdb[9] = (u8) (disk_block);
		cdb[10] = (u8) (disk_block_cnt >> 24);
		cdb[11] = (u8) (disk_block_cnt >> 16);
		cdb[12] = (u8) (disk_block_cnt >> 8);
		cdb[13] = (u8) (disk_block_cnt);
		cdb[14] = 0;
		cdb[15] = 0;
		cdb_len = 16;
	} else {
		cdb[0] = is_write ? WRITE_10 : READ_10;
		cdb[1] = 0;
		cdb[2] = (u8) (disk_block >> 24);
		cdb[3] = (u8) (disk_block >> 16);
		cdb[4] = (u8) (disk_block >> 8);
		cdb[5] = (u8) (disk_block);
		cdb[6] = 0;
		cdb[7] = (u8) (disk_block_cnt >> 8);
		cdb[8] = (u8) (disk_block_cnt);
		cdb[9] = 0;
		cdb_len = 10;
	}
	return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
4386 4387
						dev->scsi3addr,
						dev->phys_disk[map_index]);
4388 4389
}

4390 4391 4392 4393 4394
/*
 * Submit commands down the "normal" RAID stack path
 * All callers to hpsa_ciss_submit must check lockup_detected
 * beforehand, before (opt.) and after calling cmd_alloc
 */
4395 4396 4397
static int hpsa_ciss_submit(struct ctlr_info *h,
	struct CommandList *c, struct scsi_cmnd *cmd,
	unsigned char scsi3addr[])
4398 4399 4400 4401 4402 4403
{
	cmd->host_scribble = (unsigned char *) c;
	c->cmd_type = CMD_SCSI;
	c->scsi_cmd = cmd;
	c->Header.ReplyQueue = 0;  /* unused in simple mode */
	memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
4404
	c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
4405 4406 4407 4408 4409 4410 4411 4412 4413

	/* Fill in the request block... */

	c->Request.Timeout = 0;
	BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
	c->Request.CDBLen = cmd->cmd_len;
	memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
	switch (cmd->sc_data_direction) {
	case DMA_TO_DEVICE:
4414 4415
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
4416 4417
		break;
	case DMA_FROM_DEVICE:
4418 4419
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
4420 4421
		break;
	case DMA_NONE:
4422 4423
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
4424 4425 4426 4427 4428 4429 4430
		break;
	case DMA_BIDIRECTIONAL:
		/* This can happen if a buggy application does a scsi passthru
		 * and sets both inlen and outlen to non-zero. ( see
		 * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
		 */

4431 4432
		c->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449
		/* This is technically wrong, and hpsa controllers should
		 * reject it with CMD_INVALID, which is the most correct
		 * response, but non-fibre backends appear to let it
		 * slide by, and give the same results as if this field
		 * were set correctly.  Either way is acceptable for
		 * our purposes here.
		 */

		break;

	default:
		dev_err(&h->pdev->dev, "unknown data direction: %d\n",
			cmd->sc_data_direction);
		BUG();
		break;
	}

4450
	if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
4451 4452 4453 4454 4455 4456 4457 4458
		cmd_free(h, c);
		return SCSI_MLQUEUE_HOST_BUSY;
	}
	enqueue_cmd_and_start_io(h, c);
	/* the cmd'll come back via intr handler in complete_scsi_command()  */
	return 0;
}

4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500
static void hpsa_cmd_init(struct ctlr_info *h, int index,
				struct CommandList *c)
{
	dma_addr_t cmd_dma_handle, err_dma_handle;

	/* Zero out all of commandlist except the last field, refcount */
	memset(c, 0, offsetof(struct CommandList, refcount));
	c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
	cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
	c->err_info = h->errinfo_pool + index;
	memset(c->err_info, 0, sizeof(*c->err_info));
	err_dma_handle = h->errinfo_pool_dhandle
	    + index * sizeof(*c->err_info);
	c->cmdindex = index;
	c->busaddr = (u32) cmd_dma_handle;
	c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
	c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
	c->h = h;
}

static void hpsa_preinitialize_commands(struct ctlr_info *h)
{
	int i;

	for (i = 0; i < h->nr_cmds; i++) {
		struct CommandList *c = h->cmd_pool + i;

		hpsa_cmd_init(h, i, c);
		atomic_set(&c->refcount, 0);
	}
}

static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
				struct CommandList *c)
{
	dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);

	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
	memset(c->err_info, 0, sizeof(*c->err_info));
	c->busaddr = (u32) cmd_dma_handle;
}

4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516
static int hpsa_ioaccel_submit(struct ctlr_info *h,
		struct CommandList *c, struct scsi_cmnd *cmd,
		unsigned char *scsi3addr)
{
	struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
	int rc = IO_ACCEL_INELIGIBLE;

	cmd->host_scribble = (unsigned char *) c;

	if (dev->offload_enabled) {
		hpsa_cmd_init(h, c->cmdindex, c);
		c->cmd_type = CMD_SCSI;
		c->scsi_cmd = cmd;
		rc = hpsa_scsi_ioaccel_raid_map(h, c);
		if (rc < 0)     /* scsi_dma_map failed. */
			rc = SCSI_MLQUEUE_HOST_BUSY;
4517
	} else if (dev->hba_ioaccel_enabled) {
4518 4519 4520 4521 4522 4523 4524 4525 4526 4527
		hpsa_cmd_init(h, c->cmdindex, c);
		c->cmd_type = CMD_SCSI;
		c->scsi_cmd = cmd;
		rc = hpsa_scsi_ioaccel_direct_map(h, c);
		if (rc < 0)     /* scsi_dma_map failed. */
			rc = SCSI_MLQUEUE_HOST_BUSY;
	}
	return rc;
}

4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538
static void hpsa_command_resubmit_worker(struct work_struct *work)
{
	struct scsi_cmnd *cmd;
	struct hpsa_scsi_dev_t *dev;
	struct CommandList *c =
			container_of(work, struct CommandList, work);

	cmd = c->scsi_cmd;
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
4539
		cmd_free(c->h, c);
4540 4541 4542
		cmd->scsi_done(cmd);
		return;
	}
4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569
	if (c->cmd_type == CMD_IOACCEL2) {
		struct ctlr_info *h = c->h;
		struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
		int rc;

		if (c2->error_data.serv_response ==
				IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
			rc = hpsa_ioaccel_submit(h, c, cmd, dev->scsi3addr);
			if (rc == 0)
				return;
			if (rc == SCSI_MLQUEUE_HOST_BUSY) {
				/*
				 * If we get here, it means dma mapping failed.
				 * Try again via scsi mid layer, which will
				 * then get SCSI_MLQUEUE_HOST_BUSY.
				 */
				cmd->result = DID_IMM_RETRY << 16;
				cmd->scsi_done(cmd);
				cmd_free(h, c);	/* FIX-ME:  on merge, change
						 * to cmd_tagged_free() and
						 * ultimately to
						 * hpsa_cmd_free_and_done(). */
				return;
			}
			/* else, fall thru and resubmit down CISS path */
		}
	}
4570
	hpsa_cmd_partial_init(c->h, c->cmdindex, c);
4571 4572 4573 4574 4575
	if (hpsa_ciss_submit(c->h, c, cmd, dev->scsi3addr)) {
		/*
		 * If we get here, it means dma mapping failed. Try
		 * again via scsi mid layer, which will then get
		 * SCSI_MLQUEUE_HOST_BUSY.
4576 4577 4578
		 *
		 * hpsa_ciss_submit will have already freed c
		 * if it encountered a dma mapping failure.
4579 4580 4581 4582 4583 4584
		 */
		cmd->result = DID_IMM_RETRY << 16;
		cmd->scsi_done(cmd);
	}
}

4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604
/* Running in struct Scsi_Host->host_lock less mode */
static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
{
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	unsigned char scsi3addr[8];
	struct CommandList *c;
	int rc = 0;

	/* Get the ptr to our adapter structure out of cmd->host. */
	h = sdev_to_hba(cmd->device);
	dev = cmd->device->hostdata;
	if (!dev) {
		cmd->result = DID_NO_CONNECT << 16;
		cmd->scsi_done(cmd);
		return 0;
	}
	memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));

	if (unlikely(lockup_detected(h))) {
4605
		cmd->result = DID_NO_CONNECT << 16;
4606 4607 4608 4609 4610 4611 4612 4613
		cmd->scsi_done(cmd);
		return 0;
	}
	c = cmd_alloc(h);
	if (c == NULL) {			/* trouble... */
		dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n");
		return SCSI_MLQUEUE_HOST_BUSY;
	}
4614
	if (unlikely(lockup_detected(h))) {
4615
		cmd->result = DID_NO_CONNECT << 16;
4616 4617 4618 4619
		cmd_free(h, c);
		cmd->scsi_done(cmd);
		return 0;
	}
4620

4621 4622
	/*
	 * Call alternate submit routine for I/O accelerated commands.
4623 4624 4625 4626 4627
	 * Retries always go down the normal I/O path.
	 */
	if (likely(cmd->retries == 0 &&
		cmd->request->cmd_type == REQ_TYPE_FS &&
		h->acciopath_status)) {
4628 4629 4630 4631 4632 4633 4634 4635
		rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
		if (rc == 0)
			return 0;
		if (rc == SCSI_MLQUEUE_HOST_BUSY) {
			cmd_free(h, c);	/* FIX-ME:  on merge, change to
					 * cmd_tagged_free(), and ultimately
					 * to hpsa_cmd_resolve_and_free(). */
			return SCSI_MLQUEUE_HOST_BUSY;
4636 4637 4638 4639 4640
		}
	}
	return hpsa_ciss_submit(h, c, cmd, scsi3addr);
}

4641
static void hpsa_scan_complete(struct ctlr_info *h)
4642 4643 4644
{
	unsigned long flags;

4645 4646 4647 4648
	spin_lock_irqsave(&h->scan_lock, flags);
	h->scan_finished = 1;
	wake_up_all(&h->scan_wait_queue);
	spin_unlock_irqrestore(&h->scan_lock, flags);
4649 4650
}

4651 4652 4653 4654 4655
static void hpsa_scan_start(struct Scsi_Host *sh)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;

4656 4657 4658 4659 4660 4661 4662 4663
	/*
	 * Don't let rescans be initiated on a controller known to be locked
	 * up.  If the controller locks up *during* a rescan, that thread is
	 * probably hosed, but at least we can prevent new rescan threads from
	 * piling up on a locked up controller.
	 */
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
4664

4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680
	/* wait until any scan already in progress is finished. */
	while (1) {
		spin_lock_irqsave(&h->scan_lock, flags);
		if (h->scan_finished)
			break;
		spin_unlock_irqrestore(&h->scan_lock, flags);
		wait_event(h->scan_wait_queue, h->scan_finished);
		/* Note: We don't need to worry about a race between this
		 * thread and driver unload because the midlayer will
		 * have incremented the reference count, so unload won't
		 * happen if we're in here.
		 */
	}
	h->scan_finished = 0; /* mark scan as in progress */
	spin_unlock_irqrestore(&h->scan_lock, flags);

4681 4682
	if (unlikely(lockup_detected(h)))
		return hpsa_scan_complete(h);
4683

4684 4685
	hpsa_update_scsi_devices(h, h->scsi_host->host_no);

4686
	hpsa_scan_complete(h);
4687 4688
}

D
Don Brace 已提交
4689 4690
static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
4691 4692 4693 4694
	struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;

	if (!logical_drive)
		return -ENODEV;
D
Don Brace 已提交
4695 4696 4697

	if (qdepth < 1)
		qdepth = 1;
4698 4699 4700 4701
	else if (qdepth > logical_drive->queue_depth)
		qdepth = logical_drive->queue_depth;

	return scsi_change_queue_depth(sdev, qdepth);
D
Don Brace 已提交
4702 4703
}

4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716
static int hpsa_scan_finished(struct Scsi_Host *sh,
	unsigned long elapsed_time)
{
	struct ctlr_info *h = shost_to_hba(sh);
	unsigned long flags;
	int finished;

	spin_lock_irqsave(&h->scan_lock, flags);
	finished = h->scan_finished;
	spin_unlock_irqrestore(&h->scan_lock, flags);
	return finished;
}

4717 4718 4719 4720 4721 4722 4723 4724 4725 4726
static void hpsa_unregister_scsi(struct ctlr_info *h)
{
	/* we are being forcibly unloaded, and may not refuse. */
	scsi_remove_host(h->scsi_host);
	scsi_host_put(h->scsi_host);
	h->scsi_host = NULL;
}

static int hpsa_register_scsi(struct ctlr_info *h)
{
4727 4728
	struct Scsi_Host *sh;
	int error;
4729

4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740
	sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
	if (sh == NULL)
		goto fail;

	sh->io_port = 0;
	sh->n_io_port = 0;
	sh->this_id = -1;
	sh->max_channel = 3;
	sh->max_cmd_len = MAX_COMMAND_SIZE;
	sh->max_lun = HPSA_MAX_LUN;
	sh->max_id = HPSA_MAX_LUN;
4741
	sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
4742
	sh->cmd_per_lun = sh->can_queue;
4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762
	sh->sg_tablesize = h->maxsgentries;
	h->scsi_host = sh;
	sh->hostdata[0] = (unsigned long) h;
	sh->irq = h->intr[h->intr_mode];
	sh->unique_id = sh->irq;
	error = scsi_add_host(sh, &h->pdev->dev);
	if (error)
		goto fail_host_put;
	scsi_scan_host(sh);
	return 0;

 fail_host_put:
	dev_err(&h->pdev->dev, "%s: scsi_add_host"
		" failed for controller %d\n", __func__, h->ctlr);
	scsi_host_put(sh);
	return error;
 fail:
	dev_err(&h->pdev->dev, "%s: scsi_host_alloc"
		" failed for controller %d\n", __func__, h->ctlr);
	return -ENOMEM;
4763 4764 4765 4766 4767
}

static int wait_for_device_to_become_ready(struct ctlr_info *h,
	unsigned char lunaddr[])
{
4768
	int rc;
4769 4770 4771 4772
	int count = 0;
	int waittime = 1; /* seconds */
	struct CommandList *c;

4773
	c = cmd_alloc(h);
4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787
	if (!c) {
		dev_warn(&h->pdev->dev, "out of memory in "
			"wait_for_device_to_become_ready.\n");
		return IO_ERROR;
	}

	/* Send test unit ready until device ready, or give up. */
	while (count < HPSA_TUR_RETRY_LIMIT) {

		/* Wait for a bit.  do this first, because if we send
		 * the TUR right away, the reset will just abort it.
		 */
		msleep(1000 * waittime);
		count++;
4788
		rc = 0; /* Device ready. */
4789 4790 4791 4792 4793

		/* Increase wait time with each try, up to a point. */
		if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
			waittime = waittime * 2;

4794 4795 4796
		/* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
		(void) fill_cmd(c, TEST_UNIT_READY, h,
				NULL, 0, 0, lunaddr, TYPE_CMD);
4797 4798 4799 4800
		rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
						NO_TIMEOUT);
		if (rc)
			goto do_it_again;
4801 4802 4803 4804 4805 4806 4807 4808 4809 4810
		/* no unmap needed here because no data xfer. */

		if (c->err_info->CommandStatus == CMD_SUCCESS)
			break;

		if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
			c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
			(c->err_info->SenseInfo[2] == NO_SENSE ||
			c->err_info->SenseInfo[2] == UNIT_ATTENTION))
			break;
4811
do_it_again:
4812 4813 4814 4815 4816 4817 4818 4819 4820 4821
		dev_warn(&h->pdev->dev, "waiting %d secs "
			"for device to become ready.\n", waittime);
		rc = 1; /* device not ready. */
	}

	if (rc)
		dev_warn(&h->pdev->dev, "giving up on device.\n");
	else
		dev_warn(&h->pdev->dev, "device is ready.\n");

4822
	cmd_free(h, c);
4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838
	return rc;
}

/* Need at least one of these error handlers to keep ../scsi/hosts.c from
 * complaining.  Doing a host- or bus-reset can't do anything good here.
 */
static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
{
	int rc;
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;

	/* find the controller to which the command to be aborted was sent */
	h = sdev_to_hba(scsicmd->device);
	if (h == NULL) /* paranoia */
		return FAILED;
4839 4840 4841 4842

	if (lockup_detected(h))
		return FAILED;

4843 4844 4845 4846 4847 4848
	dev = scsicmd->device->hostdata;
	if (!dev) {
		dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: "
			"device lookup failed.\n");
		return FAILED;
	}
4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869

	/* if controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
		dev_warn(&h->pdev->dev,
			"scsi %d:%d:%d:%d RESET FAILED, lockup detected\n",
			h->scsi_host->host_no, dev->bus, dev->target,
			dev->lun);
		return FAILED;
	}

	/* this reset request might be the result of a lockup; check */
	if (detect_controller_lockup(h)) {
		dev_warn(&h->pdev->dev,
			 "scsi %d:%d:%d:%d RESET FAILED, new lockup detected\n",
			 h->scsi_host->host_no, dev->bus, dev->target,
			 dev->lun);
		return FAILED;
	}

	hpsa_show_dev_msg(KERN_WARNING, h, dev, "resetting");

4870
	/* send a reset to the SCSI LUN which the command was sent to */
4871 4872
	rc = hpsa_send_reset(h, dev->scsi3addr, HPSA_RESET_TYPE_LUN,
			     DEFAULT_REPLY_QUEUE);
4873 4874 4875
	if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0)
		return SUCCESS;

4876 4877 4878
	dev_warn(&h->pdev->dev,
		"scsi %d:%d:%d:%d reset failed\n",
		h->scsi_host->host_no, dev->bus, dev->target, dev->lun);
4879 4880 4881
	return FAILED;
}

4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896
static void swizzle_abort_tag(u8 *tag)
{
	u8 original_tag[8];

	memcpy(original_tag, tag, 8);
	tag[0] = original_tag[3];
	tag[1] = original_tag[2];
	tag[2] = original_tag[1];
	tag[3] = original_tag[0];
	tag[4] = original_tag[7];
	tag[5] = original_tag[6];
	tag[6] = original_tag[5];
	tag[7] = original_tag[4];
}

4897
static void hpsa_get_tag(struct ctlr_info *h,
D
Don Brace 已提交
4898
	struct CommandList *c, __le32 *taglower, __le32 *tagupper)
4899
{
D
Don Brace 已提交
4900
	u64 tag;
4901 4902 4903
	if (c->cmd_type == CMD_IOACCEL1) {
		struct io_accel1_cmd *cm1 = (struct io_accel1_cmd *)
			&h->ioaccel_cmd_pool[c->cmdindex];
D
Don Brace 已提交
4904 4905 4906
		tag = le64_to_cpu(cm1->tag);
		*tagupper = cpu_to_le32(tag >> 32);
		*taglower = cpu_to_le32(tag);
4907 4908 4909 4910 4911
		return;
	}
	if (c->cmd_type == CMD_IOACCEL2) {
		struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
			&h->ioaccel2_cmd_pool[c->cmdindex];
4912 4913 4914
		/* upper tag not used in ioaccel2 mode */
		memset(tagupper, 0, sizeof(*tagupper));
		*taglower = cm2->Tag;
4915
		return;
4916
	}
D
Don Brace 已提交
4917 4918 4919
	tag = le64_to_cpu(c->Header.tag);
	*tagupper = cpu_to_le32(tag >> 32);
	*taglower = cpu_to_le32(tag);
4920 4921
}

4922
static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
S
Stephen Cameron 已提交
4923
	struct CommandList *abort, int reply_queue)
4924 4925 4926 4927
{
	int rc = IO_OK;
	struct CommandList *c;
	struct ErrorInfo *ei;
D
Don Brace 已提交
4928
	__le32 tagupper, taglower;
4929

4930
	c = cmd_alloc(h);
4931
	if (c == NULL) {	/* trouble... */
4932
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
4933 4934 4935
		return -ENOMEM;
	}

4936
	/* fill_cmd can't fail here, no buffer to map */
S
Stephen Cameron 已提交
4937
	(void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
4938
		0, 0, scsi3addr, TYPE_MSG);
S
Stephen Cameron 已提交
4939
	if (h->needs_abort_tags_swizzled)
4940
		swizzle_abort_tag(&c->Request.CDB[4]);
4941
	(void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
4942
	hpsa_get_tag(h, abort, &taglower, &tagupper);
4943
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
4944
		__func__, tagupper, taglower);
4945 4946 4947 4948 4949 4950
	/* no unmap needed here because no data xfer. */

	ei = c->err_info;
	switch (ei->CommandStatus) {
	case CMD_SUCCESS:
		break;
4951 4952 4953
	case CMD_TMF_STATUS:
		rc = hpsa_evaluate_tmf_status(h, c);
		break;
4954 4955 4956 4957 4958
	case CMD_UNABORTABLE: /* Very common, don't make noise. */
		rc = -1;
		break;
	default:
		dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
4959
			__func__, tagupper, taglower);
4960
		hpsa_scsi_interpret_error(h, c);
4961 4962 4963
		rc = -1;
		break;
	}
4964
	cmd_free(h, c);
4965 4966
	dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
		__func__, tagupper, taglower);
4967 4968 4969
	return rc;
}

4970 4971 4972 4973 4974 4975 4976 4977
/* ioaccel2 path firmware cannot handle abort task requests.
 * Change abort requests to physical target reset, and send to the
 * address of the physical disk used for the ioaccel 2 command.
 * Return 0 on success (IO_OK)
 *	 -1 on failure
 */

static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h,
4978
	unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
4979 4980 4981 4982 4983 4984 4985 4986
{
	int rc = IO_OK;
	struct scsi_cmnd *scmd; /* scsi command within request being aborted */
	struct hpsa_scsi_dev_t *dev; /* device to which scsi cmd was sent */
	unsigned char phys_scsi3addr[8]; /* addr of phys disk with volume */
	unsigned char *psa = &phys_scsi3addr[0];

	/* Get a pointer to the hpsa logical device. */
4987
	scmd = abort->scsi_cmd;
4988 4989 4990 4991 4992 4993 4994
	dev = (struct hpsa_scsi_dev_t *)(scmd->device->hostdata);
	if (dev == NULL) {
		dev_warn(&h->pdev->dev,
			"Cannot abort: no device pointer for command.\n");
			return -1; /* not abortable */
	}

4995 4996
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
4997
			"scsi %d:%d:%d:%d %s scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
4998
			h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
4999
			"Reset as abort",
5000 5001 5002
			scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
			scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]);

5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015
	if (!dev->offload_enabled) {
		dev_warn(&h->pdev->dev,
			"Can't abort: device is not operating in HP SSD Smart Path mode.\n");
		return -1; /* not abortable */
	}

	/* Incoming scsi3addr is logical addr. We need physical disk addr. */
	if (!hpsa_get_pdisk_of_ioaccel2(h, abort, psa)) {
		dev_warn(&h->pdev->dev, "Can't abort: Failed lookup of physical address.\n");
		return -1; /* not abortable */
	}

	/* send the reset */
5016 5017 5018 5019 5020
	if (h->raid_offload_debug > 0)
		dev_info(&h->pdev->dev,
			"Reset as abort: Resetting physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
5021
	rc = hpsa_send_reset(h, psa, HPSA_RESET_TYPE_TARGET, reply_queue);
5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047
	if (rc != 0) {
		dev_warn(&h->pdev->dev,
			"Reset as abort: Failed on physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
		return rc; /* failed to reset */
	}

	/* wait for device to recover */
	if (wait_for_device_to_become_ready(h, psa) != 0) {
		dev_warn(&h->pdev->dev,
			"Reset as abort: Failed: Device never recovered from reset: 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
			psa[0], psa[1], psa[2], psa[3],
			psa[4], psa[5], psa[6], psa[7]);
		return -1;  /* failed to recover */
	}

	/* device recovered */
	dev_info(&h->pdev->dev,
		"Reset as abort: Device recovered from reset: scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
		psa[0], psa[1], psa[2], psa[3],
		psa[4], psa[5], psa[6], psa[7]);

	return rc; /* success */
}

5048
static int hpsa_send_abort_both_ways(struct ctlr_info *h,
5049
	unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
5050
{
5051 5052 5053 5054 5055 5056
	/* ioccelerator mode 2 commands should be aborted via the
	 * accelerated path, since RAID path is unaware of these commands,
	 * but underlying firmware can't handle abort TMF.
	 * Change abort to physical device reset.
	 */
	if (abort->cmd_type == CMD_IOACCEL2)
5057 5058
		return hpsa_send_reset_as_abort_ioaccel2(h, scsi3addr,
							abort, reply_queue);
S
Stephen Cameron 已提交
5059
	return hpsa_send_abort(h, scsi3addr, abort, reply_queue);
5060
}
5061

5062 5063 5064 5065 5066 5067 5068
/* Find out which reply queue a command was meant to return on */
static int hpsa_extract_reply_queue(struct ctlr_info *h,
					struct CommandList *c)
{
	if (c->cmd_type == CMD_IOACCEL2)
		return h->ioaccel2_cmd_pool[c->cmdindex].reply_queue;
	return c->Header.ReplyQueue;
5069 5070
}

S
Stephen Cameron 已提交
5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082
/*
 * Limit concurrency of abort commands to prevent
 * over-subscription of commands
 */
static inline int wait_for_available_abort_cmd(struct ctlr_info *h)
{
#define ABORT_CMD_WAIT_MSECS 5000
	return !wait_event_timeout(h->abort_cmd_wait_queue,
			atomic_dec_if_positive(&h->abort_cmds_available) >= 0,
			msecs_to_jiffies(ABORT_CMD_WAIT_MSECS));
}

5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096
/* Send an abort for the specified command.
 *	If the device and controller support it,
 *		send a task abort request.
 */
static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
{

	int i, rc;
	struct ctlr_info *h;
	struct hpsa_scsi_dev_t *dev;
	struct CommandList *abort; /* pointer to command to be aborted */
	struct scsi_cmnd *as;	/* ptr to scsi cmd inside aborted command. */
	char msg[256];		/* For debug messaging. */
	int ml = 0;
D
Don Brace 已提交
5097
	__le32 tagupper, taglower;
5098 5099 5100 5101
	int refcount, reply_queue;

	if (sc == NULL)
		return FAILED;
5102

S
Stephen Cameron 已提交
5103 5104 5105
	if (sc->device == NULL)
		return FAILED;

5106 5107
	/* Find the controller of the command to be aborted */
	h = sdev_to_hba(sc->device);
S
Stephen Cameron 已提交
5108
	if (h == NULL)
5109 5110
		return FAILED;

5111 5112 5113 5114 5115
	/* Find the device of the command to be aborted */
	dev = sc->device->hostdata;
	if (!dev) {
		dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
				msg);
5116
		return FAILED;
5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131
	}

	/* If controller locked up, we can guarantee command won't complete */
	if (lockup_detected(h)) {
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
					"ABORT FAILED, lockup detected");
		return FAILED;
	}

	/* This is a good time to check if controller lockup has occurred */
	if (detect_controller_lockup(h)) {
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
					"ABORT FAILED, new lockup detected");
		return FAILED;
	}
5132

5133 5134 5135 5136 5137 5138
	/* Check that controller supports some kind of task abort */
	if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
		!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
		return FAILED;

	memset(msg, 0, sizeof(msg));
5139
	ml += sprintf(msg+ml, "scsi %d:%d:%d:%llu %s",
5140
		h->scsi_host->host_no, sc->device->channel,
5141 5142
		sc->device->id, sc->device->lun,
		"Aborting command");
5143 5144 5145 5146

	/* Get SCSI command to be aborted */
	abort = (struct CommandList *) sc->host_scribble;
	if (abort == NULL) {
5147 5148 5149 5150 5151 5152 5153
		/* This can happen if the command already completed. */
		return SUCCESS;
	}
	refcount = atomic_inc_return(&abort->refcount);
	if (refcount == 1) { /* Command is done already. */
		cmd_free(h, abort);
		return SUCCESS;
5154
	}
S
Stephen Cameron 已提交
5155 5156 5157 5158 5159 5160 5161 5162

	/* Don't bother trying the abort if we know it won't work. */
	if (abort->cmd_type != CMD_IOACCEL2 &&
		abort->cmd_type != CMD_IOACCEL1 && !dev->supports_aborts) {
		cmd_free(h, abort);
		return FAILED;
	}

5163
	hpsa_get_tag(h, abort, &taglower, &tagupper);
5164
	reply_queue = hpsa_extract_reply_queue(h, abort);
5165
	ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
5166
	as  = abort->scsi_cmd;
5167 5168 5169 5170
	if (as != NULL)
		ml += sprintf(msg+ml, "Command:0x%x SN:0x%lx ",
			as->cmnd[0], as->serial_number);
	dev_dbg(&h->pdev->dev, "%s\n", msg);
5171
	hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
5172 5173 5174 5175 5176
	/*
	 * Command is in flight, or possibly already completed
	 * by the firmware (but not to the scsi mid layer) but we can't
	 * distinguish which.  Send the abort down.
	 */
S
Stephen Cameron 已提交
5177 5178 5179 5180 5181 5182
	if (wait_for_available_abort_cmd(h)) {
		dev_warn(&h->pdev->dev,
			"Timed out waiting for an abort command to become available.\n");
		cmd_free(h, abort);
		return FAILED;
	}
5183
	rc = hpsa_send_abort_both_ways(h, dev->scsi3addr, abort, reply_queue);
S
Stephen Cameron 已提交
5184 5185
	atomic_inc(&h->abort_cmds_available);
	wake_up_all(&h->abort_cmd_wait_queue);
5186
	if (rc != 0) {
5187 5188
		hpsa_show_dev_msg(KERN_WARNING, h, dev,
					"FAILED to abort command");
5189
		cmd_free(h, abort);
5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200
		return FAILED;
	}
	dev_info(&h->pdev->dev, "%s REQUEST SUCCEEDED.\n", msg);

	/* If the abort(s) above completed and actually aborted the
	 * command, then the command to be aborted should already be
	 * completed.  If not, wait around a bit more to see if they
	 * manage to complete normally.
	 */
#define ABORT_COMPLETE_WAIT_SECS 30
	for (i = 0; i < ABORT_COMPLETE_WAIT_SECS * 10; i++) {
5201 5202 5203
		refcount = atomic_read(&abort->refcount);
		if (refcount < 2) {
			cmd_free(h, abort);
5204
			return SUCCESS;
5205 5206 5207
		} else {
			msleep(100);
		}
5208 5209 5210
	}
	dev_warn(&h->pdev->dev, "%s FAILED. Aborted command has not completed after %d seconds.\n",
		msg, ABORT_COMPLETE_WAIT_SECS);
5211
	cmd_free(h, abort);
5212 5213 5214
	return FAILED;
}

5215 5216 5217 5218 5219 5220
/*
 * For operations that cannot sleep, a command block is allocated at init,
 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
 * which ones are free or in use.  Lock must be held when calling this.
 * cmd_free() is the complement.
 */
5221

5222 5223 5224
static struct CommandList *cmd_alloc(struct ctlr_info *h)
{
	struct CommandList *c;
5225
	int refcount, i;
5226
	unsigned long offset;
5227

5228 5229
	/*
	 * There is some *extremely* small but non-zero chance that that
5230 5231 5232 5233 5234 5235 5236 5237 5238
	 * multiple threads could get in here, and one thread could
	 * be scanning through the list of bits looking for a free
	 * one, but the free ones are always behind him, and other
	 * threads sneak in behind him and eat them before he can
	 * get to them, so that while there is always a free one, a
	 * very unlucky thread might be starved anyway, never able to
	 * beat the other threads.  In reality, this happens so
	 * infrequently as to be indistinguishable from never.
	 */
5239

5240
	offset = h->last_allocation; /* benignly racy */
5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257
	for (;;) {
		i = find_next_zero_bit(h->cmd_pool_bits, h->nr_cmds, offset);
		if (unlikely(i == h->nr_cmds)) {
			offset = 0;
			continue;
		}
		c = h->cmd_pool + i;
		refcount = atomic_inc_return(&c->refcount);
		if (unlikely(refcount > 1)) {
			cmd_free(h, c); /* already in use */
			offset = (i + 1) % h->nr_cmds;
			continue;
		}
		set_bit(i & (BITS_PER_LONG - 1),
			h->cmd_pool_bits + (i / BITS_PER_LONG));
		break; /* it's ours now. */
	}
5258
	h->last_allocation = i; /* benignly racy */
5259
	hpsa_cmd_partial_init(h, i, c);
5260 5261 5262 5263 5264
	return c;
}

static void cmd_free(struct ctlr_info *h, struct CommandList *c)
{
5265 5266
	if (atomic_dec_and_test(&c->refcount)) {
		int i;
5267

5268 5269 5270 5271
		i = c - h->cmd_pool;
		clear_bit(i & (BITS_PER_LONG - 1),
			  h->cmd_pool_bits + (i / BITS_PER_LONG));
	}
5272 5273 5274 5275
}

#ifdef CONFIG_COMPAT

D
Don Brace 已提交
5276 5277
static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
	void __user *arg)
5278 5279 5280 5281 5282 5283 5284 5285
{
	IOCTL32_Command_struct __user *arg32 =
	    (IOCTL32_Command_struct __user *) arg;
	IOCTL_Command_struct arg64;
	IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

5286
	memset(&arg64, 0, sizeof(arg64));
5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301
	err = 0;
	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |= copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |= copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

D
Don Brace 已提交
5302
	err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
5303 5304 5305 5306 5307 5308 5309 5310 5311 5312
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}

static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
D
Don Brace 已提交
5313
	int cmd, void __user *arg)
5314 5315 5316 5317 5318 5319 5320 5321 5322
{
	BIG_IOCTL32_Command_struct __user *arg32 =
	    (BIG_IOCTL32_Command_struct __user *) arg;
	BIG_IOCTL_Command_struct arg64;
	BIG_IOCTL_Command_struct __user *p =
	    compat_alloc_user_space(sizeof(arg64));
	int err;
	u32 cp;

5323
	memset(&arg64, 0, sizeof(arg64));
5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339
	err = 0;
	err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
			   sizeof(arg64.LUN_info));
	err |= copy_from_user(&arg64.Request, &arg32->Request,
			   sizeof(arg64.Request));
	err |= copy_from_user(&arg64.error_info, &arg32->error_info,
			   sizeof(arg64.error_info));
	err |= get_user(arg64.buf_size, &arg32->buf_size);
	err |= get_user(arg64.malloc_size, &arg32->malloc_size);
	err |= get_user(cp, &arg32->buf);
	arg64.buf = compat_ptr(cp);
	err |= copy_to_user(p, &arg64, sizeof(arg64));

	if (err)
		return -EFAULT;

D
Don Brace 已提交
5340
	err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
5341 5342 5343 5344 5345 5346 5347 5348
	if (err)
		return err;
	err |= copy_in_user(&arg32->error_info, &p->error_info,
			 sizeof(arg32->error_info));
	if (err)
		return -EFAULT;
	return err;
}
5349

D
Don Brace 已提交
5350
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378
{
	switch (cmd) {
	case CCISS_GETPCIINFO:
	case CCISS_GETINTINFO:
	case CCISS_SETINTINFO:
	case CCISS_GETNODENAME:
	case CCISS_SETNODENAME:
	case CCISS_GETHEARTBEAT:
	case CCISS_GETBUSTYPES:
	case CCISS_GETFIRMVER:
	case CCISS_GETDRIVVER:
	case CCISS_REVALIDVOLS:
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
	case CCISS_RESCANDISK:
	case CCISS_GETLUNINFO:
		return hpsa_ioctl(dev, cmd, arg);

	case CCISS_PASSTHRU32:
		return hpsa_ioctl32_passthru(dev, cmd, arg);
	case CCISS_BIG_PASSTHRU32:
		return hpsa_ioctl32_big_passthru(dev, cmd, arg);

	default:
		return -ENOIOCTLCMD;
	}
}
5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423
#endif

static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
{
	struct hpsa_pci_info pciinfo;

	if (!argp)
		return -EINVAL;
	pciinfo.domain = pci_domain_nr(h->pdev->bus);
	pciinfo.bus = h->pdev->bus->number;
	pciinfo.dev_fn = h->pdev->devfn;
	pciinfo.board_id = h->board_id;
	if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
		return -EFAULT;
	return 0;
}

static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
{
	DriverVer_type DriverVer;
	unsigned char vmaj, vmin, vsubmin;
	int rc;

	rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
		&vmaj, &vmin, &vsubmin);
	if (rc != 3) {
		dev_info(&h->pdev->dev, "driver version string '%s' "
			"unrecognized.", HPSA_DRIVER_VERSION);
		vmaj = 0;
		vmin = 0;
		vsubmin = 0;
	}
	DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
	if (!argp)
		return -EINVAL;
	if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
		return -EFAULT;
	return 0;
}

static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
{
	IOCTL_Command_struct iocommand;
	struct CommandList *c;
	char *buff = NULL;
5424
	u64 temp64;
5425
	int rc = 0;
5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
		return -EFAULT;
	if ((iocommand.buf_size < 1) &&
	    (iocommand.Request.Type.Direction != XFER_NONE)) {
		return -EINVAL;
	}
	if (iocommand.buf_size > 0) {
		buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
		if (buff == NULL)
			return -EFAULT;
5441
		if (iocommand.Request.Type.Direction & XFER_WRITE) {
5442 5443 5444
			/* Copy the data into the buffer we created */
			if (copy_from_user(buff, iocommand.buf,
				iocommand.buf_size)) {
5445 5446
				rc = -EFAULT;
				goto out_kfree;
5447 5448 5449
			}
		} else {
			memset(buff, 0, iocommand.buf_size);
5450
		}
5451
	}
5452
	c = cmd_alloc(h);
5453
	if (c == NULL) {
5454 5455
		rc = -ENOMEM;
		goto out_kfree;
5456 5457 5458 5459 5460 5461 5462
	}
	/* Fill in the command type */
	c->cmd_type = CMD_IOCTL_PEND;
	/* Fill in Command Header */
	c->Header.ReplyQueue = 0; /* unused in simple mode */
	if (iocommand.buf_size > 0) {	/* buffer to fill */
		c->Header.SGList = 1;
5463
		c->Header.SGTotal = cpu_to_le16(1);
5464 5465
	} else	{ /* no buffers to fill */
		c->Header.SGList = 0;
5466
		c->Header.SGTotal = cpu_to_le16(0);
5467 5468 5469 5470 5471 5472 5473 5474 5475
	}
	memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));

	/* Fill in Request block */
	memcpy(&c->Request, &iocommand.Request,
		sizeof(c->Request));

	/* Fill in the scatter gather information */
	if (iocommand.buf_size > 0) {
5476
		temp64 = pci_map_single(h->pdev, buff,
5477
			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5478 5479 5480
		if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
			c->SG[0].Addr = cpu_to_le64(0);
			c->SG[0].Len = cpu_to_le32(0);
5481 5482 5483
			rc = -ENOMEM;
			goto out;
		}
5484 5485 5486
		c->SG[0].Addr = cpu_to_le64(temp64);
		c->SG[0].Len = cpu_to_le32(iocommand.buf_size);
		c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
5487
	}
5488
	rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
5489 5490
	if (iocommand.buf_size > 0)
		hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
5491
	check_ioctl_unit_attention(h, c);
5492 5493 5494 5495
	if (rc) {
		rc = -EIO;
		goto out;
	}
5496 5497 5498 5499 5500

	/* Copy the error information out */
	memcpy(&iocommand.error_info, c->err_info,
		sizeof(iocommand.error_info));
	if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
5501 5502
		rc = -EFAULT;
		goto out;
5503
	}
5504
	if ((iocommand.Request.Type.Direction & XFER_READ) &&
5505
		iocommand.buf_size > 0) {
5506 5507
		/* Copy the data out of the buffer we created */
		if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
5508 5509
			rc = -EFAULT;
			goto out;
5510 5511
		}
	}
5512
out:
5513
	cmd_free(h, c);
5514 5515 5516
out_kfree:
	kfree(buff);
	return rc;
5517 5518 5519 5520 5521 5522 5523 5524
}

static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
{
	BIG_IOCTL_Command_struct *ioc;
	struct CommandList *c;
	unsigned char **buff = NULL;
	int *buff_size = NULL;
5525
	u64 temp64;
5526 5527
	BYTE sg_used = 0;
	int status = 0;
5528 5529
	u32 left;
	u32 sz;
5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555
	BYTE __user *data_ptr;

	if (!argp)
		return -EINVAL;
	if (!capable(CAP_SYS_RAWIO))
		return -EPERM;
	ioc = (BIG_IOCTL_Command_struct *)
	    kmalloc(sizeof(*ioc), GFP_KERNEL);
	if (!ioc) {
		status = -ENOMEM;
		goto cleanup1;
	}
	if (copy_from_user(ioc, argp, sizeof(*ioc))) {
		status = -EFAULT;
		goto cleanup1;
	}
	if ((ioc->buf_size < 1) &&
	    (ioc->Request.Type.Direction != XFER_NONE)) {
		status = -EINVAL;
		goto cleanup1;
	}
	/* Check kmalloc limits  using all SGs */
	if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
		status = -EINVAL;
		goto cleanup1;
	}
5556
	if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
5557 5558 5559
		status = -EINVAL;
		goto cleanup1;
	}
5560
	buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
5561 5562 5563 5564
	if (!buff) {
		status = -ENOMEM;
		goto cleanup1;
	}
5565
	buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579
	if (!buff_size) {
		status = -ENOMEM;
		goto cleanup1;
	}
	left = ioc->buf_size;
	data_ptr = ioc->buf;
	while (left) {
		sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
		buff_size[sg_used] = sz;
		buff[sg_used] = kmalloc(sz, GFP_KERNEL);
		if (buff[sg_used] == NULL) {
			status = -ENOMEM;
			goto cleanup1;
		}
5580
		if (ioc->Request.Type.Direction & XFER_WRITE) {
5581
			if (copy_from_user(buff[sg_used], data_ptr, sz)) {
5582
				status = -EFAULT;
5583 5584 5585 5586 5587 5588 5589 5590
				goto cleanup1;
			}
		} else
			memset(buff[sg_used], 0, sz);
		left -= sz;
		data_ptr += sz;
		sg_used++;
	}
5591
	c = cmd_alloc(h);
5592 5593 5594 5595 5596 5597
	if (c == NULL) {
		status = -ENOMEM;
		goto cleanup1;
	}
	c->cmd_type = CMD_IOCTL_PEND;
	c->Header.ReplyQueue = 0;
5598 5599
	c->Header.SGList = (u8) sg_used;
	c->Header.SGTotal = cpu_to_le16(sg_used);
5600 5601 5602 5603 5604
	memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
	memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
	if (ioc->buf_size > 0) {
		int i;
		for (i = 0; i < sg_used; i++) {
5605
			temp64 = pci_map_single(h->pdev, buff[i],
5606
				    buff_size[i], PCI_DMA_BIDIRECTIONAL);
5607 5608 5609 5610
			if (dma_mapping_error(&h->pdev->dev,
							(dma_addr_t) temp64)) {
				c->SG[i].Addr = cpu_to_le64(0);
				c->SG[i].Len = cpu_to_le32(0);
5611 5612 5613
				hpsa_pci_unmap(h->pdev, c, i,
					PCI_DMA_BIDIRECTIONAL);
				status = -ENOMEM;
5614
				goto cleanup0;
5615
			}
5616 5617 5618
			c->SG[i].Addr = cpu_to_le64(temp64);
			c->SG[i].Len = cpu_to_le32(buff_size[i]);
			c->SG[i].Ext = cpu_to_le32(0);
5619
		}
5620
		c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
5621
	}
5622
	status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE, NO_TIMEOUT);
5623 5624
	if (sg_used)
		hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
5625
	check_ioctl_unit_attention(h, c);
5626 5627 5628 5629 5630
	if (status) {
		status = -EIO;
		goto cleanup0;
	}

5631 5632 5633 5634
	/* Copy the error information out */
	memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
	if (copy_to_user(argp, ioc, sizeof(*ioc))) {
		status = -EFAULT;
5635
		goto cleanup0;
5636
	}
5637
	if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
D
Don Brace 已提交
5638 5639
		int i;

5640 5641 5642 5643 5644
		/* Copy the data out of the buffer we created */
		BYTE __user *ptr = ioc->buf;
		for (i = 0; i < sg_used; i++) {
			if (copy_to_user(ptr, buff[i], buff_size[i])) {
				status = -EFAULT;
5645
				goto cleanup0;
5646 5647 5648 5649 5650
			}
			ptr += buff_size[i];
		}
	}
	status = 0;
5651
cleanup0:
5652
	cmd_free(h, c);
5653 5654
cleanup1:
	if (buff) {
D
Don Brace 已提交
5655 5656
		int i;

5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672
		for (i = 0; i < sg_used; i++)
			kfree(buff[i]);
		kfree(buff);
	}
	kfree(buff_size);
	kfree(ioc);
	return status;
}

static void check_ioctl_unit_attention(struct ctlr_info *h,
	struct CommandList *c)
{
	if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
			c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
		(void) check_for_unit_attention(h, c);
}
5673

5674 5675 5676
/*
 * ioctl
 */
D
Don Brace 已提交
5677
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
5678 5679 5680
{
	struct ctlr_info *h;
	void __user *argp = (void __user *)arg;
5681
	int rc;
5682 5683 5684 5685 5686 5687 5688

	h = sdev_to_hba(dev);

	switch (cmd) {
	case CCISS_DEREGDISK:
	case CCISS_REGNEWDISK:
	case CCISS_REGNEWD:
5689
		hpsa_scan_start(h->scsi_host);
5690 5691 5692 5693 5694 5695
		return 0;
	case CCISS_GETPCIINFO:
		return hpsa_getpciinfo_ioctl(h, argp);
	case CCISS_GETDRIVVER:
		return hpsa_getdrivver_ioctl(h, argp);
	case CCISS_PASSTHRU:
5696
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
5697 5698
			return -EAGAIN;
		rc = hpsa_passthru_ioctl(h, argp);
5699
		atomic_inc(&h->passthru_cmds_avail);
5700
		return rc;
5701
	case CCISS_BIG_PASSTHRU:
5702
		if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
5703 5704
			return -EAGAIN;
		rc = hpsa_big_passthru_ioctl(h, argp);
5705
		atomic_inc(&h->passthru_cmds_avail);
5706
		return rc;
5707 5708 5709 5710 5711
	default:
		return -ENOTTY;
	}
}

5712 5713
static int hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
				u8 reset_type)
5714 5715 5716 5717 5718 5719
{
	struct CommandList *c;

	c = cmd_alloc(h);
	if (!c)
		return -ENOMEM;
5720 5721
	/* fill_cmd can't fail here, no data buffer to map */
	(void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732
		RAID_CTLR_LUNID, TYPE_MSG);
	c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
	c->waiting = NULL;
	enqueue_cmd_and_start_io(h, c);
	/* Don't wait for completion, the reset won't complete.  Don't free
	 * the command either.  This is the last command we will send before
	 * re-initializing everything, so it doesn't matter and won't leak.
	 */
	return 0;
}

5733
static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
5734
	void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
5735 5736 5737
	int cmd_type)
{
	int pci_dir = XFER_NONE;
S
Stephen Cameron 已提交
5738
	u64 tag; /* for commands to be aborted */
5739 5740 5741 5742 5743

	c->cmd_type = CMD_IOCTL_PEND;
	c->Header.ReplyQueue = 0;
	if (buff != NULL && size > 0) {
		c->Header.SGList = 1;
5744
		c->Header.SGTotal = cpu_to_le16(1);
5745 5746
	} else {
		c->Header.SGList = 0;
5747
		c->Header.SGTotal = cpu_to_le16(0);
5748 5749 5750 5751 5752 5753 5754
	}
	memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);

	if (cmd_type == TYPE_CMD) {
		switch (cmd) {
		case HPSA_INQUIRY:
			/* are we trying to read a vital product page */
5755
			if (page_code & VPD_PAGE) {
5756
				c->Request.CDB[1] = 0x01;
5757
				c->Request.CDB[2] = (page_code & 0xff);
5758 5759
			}
			c->Request.CDBLen = 6;
5760 5761
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
5762 5763 5764 5765 5766 5767 5768 5769 5770 5771
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_INQUIRY;
			c->Request.CDB[4] = size & 0xFF;
			break;
		case HPSA_REPORT_LOG:
		case HPSA_REPORT_PHYS:
			/* Talking to controller so It's a physical command
			   mode = 00 target = 0.  Nothing to write.
			 */
			c->Request.CDBLen = 12;
5772 5773
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
5774 5775 5776 5777 5778 5779 5780 5781 5782
			c->Request.Timeout = 0;
			c->Request.CDB[0] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
		case HPSA_CACHE_FLUSH:
			c->Request.CDBLen = 12;
5783 5784 5785
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
5786 5787 5788
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_WRITE;
			c->Request.CDB[6] = BMIC_CACHE_FLUSH;
5789 5790
			c->Request.CDB[7] = (size >> 8) & 0xFF;
			c->Request.CDB[8] = size & 0xFF;
5791 5792 5793
			break;
		case TEST_UNIT_READY:
			c->Request.CDBLen = 6;
5794 5795
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
5796 5797
			c->Request.Timeout = 0;
			break;
5798 5799
		case HPSA_GET_RAID_MAP:
			c->Request.CDBLen = 12;
5800 5801
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
5802 5803 5804 5805 5806 5807 5808 5809
			c->Request.Timeout = 0;
			c->Request.CDB[0] = HPSA_CISS_READ;
			c->Request.CDB[1] = cmd;
			c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			c->Request.CDB[9] = size & 0xFF;
			break;
5810 5811
		case BMIC_SENSE_CONTROLLER_PARAMETERS:
			c->Request.CDBLen = 10;
5812 5813
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
5814 5815 5816 5817 5818 5819
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0xFF;
			break;
5820 5821 5822 5823 5824 5825 5826 5827 5828 5829
		case BMIC_IDENTIFY_PHYSICAL_DEVICE:
			c->Request.CDBLen = 10;
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
			c->Request.Timeout = 0;
			c->Request.CDB[0] = BMIC_READ;
			c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
			c->Request.CDB[7] = (size >> 16) & 0xFF;
			c->Request.CDB[8] = (size >> 8) & 0XFF;
			break;
5830 5831 5832
		default:
			dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
			BUG();
5833
			return -1;
5834 5835 5836 5837 5838 5839
		}
	} else if (cmd_type == TYPE_MSG) {
		switch (cmd) {

		case  HPSA_DEVICE_RESET_MSG:
			c->Request.CDBLen = 16;
5840 5841
			c->Request.type_attr_dir =
				TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
5842
			c->Request.Timeout = 0; /* Don't time out */
5843 5844
			memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
			c->Request.CDB[0] =  cmd;
5845
			c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
5846 5847 5848 5849 5850 5851
			/* If bytes 4-7 are zero, it means reset the */
			/* LunID device */
			c->Request.CDB[4] = 0x00;
			c->Request.CDB[5] = 0x00;
			c->Request.CDB[6] = 0x00;
			c->Request.CDB[7] = 0x00;
5852 5853
			break;
		case  HPSA_ABORT_MSG:
S
Stephen Cameron 已提交
5854
			memcpy(&tag, buff, sizeof(tag));
D
Don Brace 已提交
5855
			dev_dbg(&h->pdev->dev,
S
Stephen Cameron 已提交
5856 5857
				"Abort Tag:0x%016llx using rqst Tag:0x%016llx",
				tag, c->Header.tag);
5858
			c->Request.CDBLen = 16;
5859 5860 5861
			c->Request.type_attr_dir =
					TYPE_ATTR_DIR(cmd_type,
						ATTR_SIMPLE, XFER_WRITE);
5862 5863 5864 5865 5866 5867
			c->Request.Timeout = 0; /* Don't time out */
			c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
			c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
			c->Request.CDB[2] = 0x00; /* reserved */
			c->Request.CDB[3] = 0x00; /* reserved */
			/* Tag to abort goes in CDB[4]-CDB[11] */
S
Stephen Cameron 已提交
5868
			memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
5869 5870 5871 5872
			c->Request.CDB[12] = 0x00; /* reserved */
			c->Request.CDB[13] = 0x00; /* reserved */
			c->Request.CDB[14] = 0x00; /* reserved */
			c->Request.CDB[15] = 0x00; /* reserved */
5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883
		break;
		default:
			dev_warn(&h->pdev->dev, "unknown message type %d\n",
				cmd);
			BUG();
		}
	} else {
		dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
		BUG();
	}

5884
	switch (GET_DIR(c->Request.type_attr_dir)) {
5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896
	case XFER_READ:
		pci_dir = PCI_DMA_FROMDEVICE;
		break;
	case XFER_WRITE:
		pci_dir = PCI_DMA_TODEVICE;
		break;
	case XFER_NONE:
		pci_dir = PCI_DMA_NONE;
		break;
	default:
		pci_dir = PCI_DMA_BIDIRECTIONAL;
	}
5897 5898 5899
	if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
		return -1;
	return 0;
5900 5901 5902 5903 5904 5905 5906 5907 5908
}

/*
 * Map (physical) PCI mem into (virtual) kernel space
 */
static void __iomem *remap_pci_mem(ulong base, ulong size)
{
	ulong page_base = ((ulong) base) & PAGE_MASK;
	ulong page_offs = ((ulong) base) - page_base;
5909 5910
	void __iomem *page_remapped = ioremap_nocache(page_base,
		page_offs + size);
5911 5912 5913 5914

	return page_remapped ? (page_remapped + page_offs) : NULL;
}

5915
static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
5916
{
5917
	return h->access.command_completed(h, q);
5918 5919
}

5920
static inline bool interrupt_pending(struct ctlr_info *h)
5921 5922 5923 5924 5925 5926
{
	return h->access.intr_pending(h);
}

static inline long interrupt_not_for_us(struct ctlr_info *h)
{
5927 5928
	return (h->access.intr_pending(h) == 0) ||
		(h->interrupts_enabled == 0);
5929 5930
}

5931 5932
static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
	u32 raw_tag)
5933 5934 5935 5936 5937 5938 5939 5940
{
	if (unlikely(tag_index >= h->nr_cmds)) {
		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
		return 1;
	}
	return 0;
}

5941
static inline void finish_cmd(struct CommandList *c)
5942
{
5943
	dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
5944 5945
	if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
			|| c->cmd_type == CMD_IOACCEL2))
5946
		complete_scsi_command(c);
5947 5948
	else if (c->cmd_type == CMD_IOCTL_PEND)
		complete(c->waiting);
5949 5950
}

5951 5952

static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag)
5953
{
5954 5955
#define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
#define HPSA_SIMPLE_ERROR_BITS 0x03
5956
	if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
5957 5958
		return tag & ~HPSA_SIMPLE_ERROR_BITS;
	return tag & ~HPSA_PERF_ERROR_BITS;
5959 5960
}

5961
/* process completion of an indexed ("direct lookup") command */
5962
static inline void process_indexed_cmd(struct ctlr_info *h,
5963 5964 5965 5966 5967
	u32 raw_tag)
{
	u32 tag_index;
	struct CommandList *c;

5968
	tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
5969 5970 5971 5972
	if (!bad_tag(h, tag_index, raw_tag)) {
		c = h->cmd_pool + tag_index;
		finish_cmd(c);
	}
5973 5974
}

5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993
/* Some controllers, like p400, will give us one interrupt
 * after a soft reset, even if we turned interrupts off.
 * Only need to check for this in the hpsa_xxx_discard_completions
 * functions.
 */
static int ignore_bogus_interrupt(struct ctlr_info *h)
{
	if (likely(!reset_devices))
		return 0;

	if (likely(h->interrupts_enabled))
		return 0;

	dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
		"(known firmware bug.)  Ignoring.\n");

	return 1;
}

5994 5995 5996 5997 5998 5999
/*
 * Convert &h->q[x] (passed to interrupt handlers) back to h.
 * Relies on (h-q[x] == x) being true for x such that
 * 0 <= x < MAX_REPLY_QUEUES.
 */
static struct ctlr_info *queue_to_hba(u8 *queue)
6000
{
6001 6002 6003 6004 6005 6006 6007
	return container_of((queue - *queue), struct ctlr_info, q[0]);
}

static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
{
	struct ctlr_info *h = queue_to_hba(queue);
	u8 q = *(u8 *) queue;
6008 6009 6010 6011 6012 6013 6014
	u32 raw_tag;

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6015
	h->last_intr_timestamp = get_jiffies_64();
6016
	while (interrupt_pending(h)) {
6017
		raw_tag = get_next_completion(h, q);
6018
		while (raw_tag != FIFO_EMPTY)
6019
			raw_tag = next_command(h, q);
6020 6021 6022 6023
	}
	return IRQ_HANDLED;
}

6024
static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
6025
{
6026
	struct ctlr_info *h = queue_to_hba(queue);
6027
	u32 raw_tag;
6028
	u8 q = *(u8 *) queue;
6029 6030 6031 6032

	if (ignore_bogus_interrupt(h))
		return IRQ_NONE;

6033
	h->last_intr_timestamp = get_jiffies_64();
6034
	raw_tag = get_next_completion(h, q);
6035
	while (raw_tag != FIFO_EMPTY)
6036
		raw_tag = next_command(h, q);
6037 6038 6039
	return IRQ_HANDLED;
}

6040
static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
6041
{
6042
	struct ctlr_info *h = queue_to_hba((u8 *) queue);
6043
	u32 raw_tag;
6044
	u8 q = *(u8 *) queue;
6045 6046 6047

	if (interrupt_not_for_us(h))
		return IRQ_NONE;
6048
	h->last_intr_timestamp = get_jiffies_64();
6049
	while (interrupt_pending(h)) {
6050
		raw_tag = get_next_completion(h, q);
6051
		while (raw_tag != FIFO_EMPTY) {
6052
			process_indexed_cmd(h, raw_tag);
6053
			raw_tag = next_command(h, q);
6054 6055 6056 6057 6058
		}
	}
	return IRQ_HANDLED;
}

6059
static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
6060
{
6061
	struct ctlr_info *h = queue_to_hba(queue);
6062
	u32 raw_tag;
6063
	u8 q = *(u8 *) queue;
6064

6065
	h->last_intr_timestamp = get_jiffies_64();
6066
	raw_tag = get_next_completion(h, q);
6067
	while (raw_tag != FIFO_EMPTY) {
6068
		process_indexed_cmd(h, raw_tag);
6069
		raw_tag = next_command(h, q);
6070 6071 6072 6073
	}
	return IRQ_HANDLED;
}

6074 6075 6076 6077
/* Send a message CDB to the firmware. Careful, this only works
 * in simple mode, not performant mode due to the tag lookup.
 * We only ever use this immediately after a controller reset.
 */
6078 6079
static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
			unsigned char type)
6080 6081 6082 6083 6084 6085 6086 6087 6088 6089
{
	struct Command {
		struct CommandListHeader CommandHeader;
		struct RequestBlock Request;
		struct ErrDescriptor ErrorDescriptor;
	};
	struct Command *cmd;
	static const size_t cmd_sz = sizeof(*cmd) +
					sizeof(cmd->ErrorDescriptor);
	dma_addr_t paddr64;
D
Don Brace 已提交
6090 6091
	__le32 paddr32;
	u32 tag;
6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105
	void __iomem *vaddr;
	int i, err;

	vaddr = pci_ioremap_bar(pdev, 0);
	if (vaddr == NULL)
		return -ENOMEM;

	/* The Inbound Post Queue only accepts 32-bit physical addresses for the
	 * CCISS commands, so they must be allocated from the lower 4GiB of
	 * memory.
	 */
	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	if (err) {
		iounmap(vaddr);
6106
		return err;
6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118
	}

	cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
	if (cmd == NULL) {
		iounmap(vaddr);
		return -ENOMEM;
	}

	/* This must fit, because of the 32-bit consistent DMA mask.  Also,
	 * although there's no guarantee, we assume that the address is at
	 * least 4-byte aligned (most likely, it's page-aligned).
	 */
D
Don Brace 已提交
6119
	paddr32 = cpu_to_le32(paddr64);
6120 6121 6122

	cmd->CommandHeader.ReplyQueue = 0;
	cmd->CommandHeader.SGList = 0;
6123
	cmd->CommandHeader.SGTotal = cpu_to_le16(0);
D
Don Brace 已提交
6124
	cmd->CommandHeader.tag = cpu_to_le64(paddr64);
6125 6126 6127
	memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);

	cmd->Request.CDBLen = 16;
6128 6129
	cmd->Request.type_attr_dir =
			TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
6130 6131 6132 6133
	cmd->Request.Timeout = 0; /* Don't time out */
	cmd->Request.CDB[0] = opcode;
	cmd->Request.CDB[1] = type;
	memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
6134
	cmd->ErrorDescriptor.Addr =
D
Don Brace 已提交
6135
			cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
6136
	cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
6137

D
Don Brace 已提交
6138
	writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
6139 6140 6141

	for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
		tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
D
Don Brace 已提交
6142
		if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172
			break;
		msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
	}

	iounmap(vaddr);

	/* we leak the DMA buffer here ... no choice since the controller could
	 *  still complete the command.
	 */
	if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
		dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
			opcode, type);
		return -ETIMEDOUT;
	}

	pci_free_consistent(pdev, cmd_sz, cmd, paddr64);

	if (tag & HPSA_ERROR_BIT) {
		dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
			opcode, type);
		return -EIO;
	}

	dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
		opcode, type);
	return 0;
}

#define hpsa_noop(p) hpsa_message(p, 3, 0)

6173
static int hpsa_controller_hard_reset(struct pci_dev *pdev,
D
Don Brace 已提交
6174
	void __iomem *vaddr, u32 use_doorbell)
6175 6176 6177 6178 6179 6180 6181 6182
{

	if (use_doorbell) {
		/* For everything after the P600, the PCI power state method
		 * of resetting the controller doesn't work, so we have this
		 * other way using the doorbell register.
		 */
		dev_info(&pdev->dev, "using doorbell to reset controller\n");
6183
		writel(use_doorbell, vaddr + SA5_DOORBELL);
6184

6185
		/* PMC hardware guys tell us we need a 10 second delay after
6186 6187 6188 6189
		 * doorbell reset and before any attempt to talk to the board
		 * at all to ensure that this actually works and doesn't fall
		 * over in some weird corner cases.
		 */
6190
		msleep(10000);
6191 6192 6193 6194 6195 6196 6197 6198 6199
	} else { /* Try to do it the PCI power state way */

		/* Quoting from the Open CISS Specification: "The Power
		 * Management Control/Status Register (CSR) controls the power
		 * state of the device.  The normal operating state is D0,
		 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
		 * the controller, place the interface device in D3 then to D0,
		 * this causes a secondary PCI reset which will reset the
		 * controller." */
6200 6201 6202

		int rc = 0;

6203
		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
6204

6205
		/* enter the D3hot power management state */
6206 6207 6208
		rc = pci_set_power_state(pdev, PCI_D3hot);
		if (rc)
			return rc;
6209 6210 6211 6212

		msleep(500);

		/* enter the D0 power management state */
6213 6214 6215
		rc = pci_set_power_state(pdev, PCI_D0);
		if (rc)
			return rc;
6216 6217 6218 6219 6220 6221 6222

		/*
		 * The P600 requires a small delay when changing states.
		 * Otherwise we may think the board did not reset and we bail.
		 * This for kdump only and is particular to the P600.
		 */
		msleep(500);
6223 6224 6225 6226
	}
	return 0;
}

6227
static void init_driver_version(char *driver_version, int len)
6228 6229
{
	memset(driver_version, 0, len);
6230
	strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
6231 6232
}

6233
static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248
{
	char *driver_version;
	int i, size = sizeof(cfgtable->driver_version);

	driver_version = kmalloc(size, GFP_KERNEL);
	if (!driver_version)
		return -ENOMEM;

	init_driver_version(driver_version, size);
	for (i = 0; i < size; i++)
		writeb(driver_version[i], &cfgtable->driver_version[i]);
	kfree(driver_version);
	return 0;
}

6249 6250
static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
					  unsigned char *driver_ver)
6251 6252 6253 6254 6255 6256 6257
{
	int i;

	for (i = 0; i < sizeof(cfgtable->driver_version); i++)
		driver_ver[i] = readb(&cfgtable->driver_version[i]);
}

6258
static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277
{

	char *driver_ver, *old_driver_ver;
	int rc, size = sizeof(cfgtable->driver_version);

	old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
	if (!old_driver_ver)
		return -ENOMEM;
	driver_ver = old_driver_ver + size;

	/* After a reset, the 32 bytes of "driver version" in the cfgtable
	 * should have been changed, otherwise we know the reset failed.
	 */
	init_driver_version(old_driver_ver, size);
	read_driver_ver_from_cfgtable(cfgtable, driver_ver);
	rc = !memcmp(driver_ver, old_driver_ver, size);
	kfree(old_driver_ver);
	return rc;
}
6278
/* This does a hard reset of the controller using PCI power management
6279
 * states or the using the doorbell register.
6280
 */
6281
static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
6282
{
6283 6284 6285 6286 6287
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
	void __iomem *vaddr;
	unsigned long paddr;
6288
	u32 misc_fw_support;
6289
	int rc;
6290
	struct CfgTable __iomem *cfgtable;
6291
	u32 use_doorbell;
6292
	u16 command_register;
6293

6294 6295
	/* For controllers as old as the P600, this is very nearly
	 * the same thing as
6296 6297 6298 6299 6300 6301
	 *
	 * pci_save_state(pci_dev);
	 * pci_set_power_state(pci_dev, PCI_D3hot);
	 * pci_set_power_state(pci_dev, PCI_D0);
	 * pci_restore_state(pci_dev);
	 *
6302 6303 6304
	 * For controllers newer than the P600, the pci power state
	 * method of resetting doesn't work so we have another way
	 * using the doorbell register.
6305
	 */
6306

6307 6308
	if (!ctlr_is_resettable(board_id)) {
		dev_warn(&pdev->dev, "Controller not resettable\n");
6309 6310
		return -ENODEV;
	}
6311 6312 6313 6314

	/* if controller is soft- but not hard resettable... */
	if (!ctlr_is_hard_resettable(board_id))
		return -ENOTSUPP; /* try soft reset later. */
6315

6316 6317 6318
	/* Save the PCI command register */
	pci_read_config_word(pdev, 4, &command_register);
	pci_save_state(pdev);
6319

6320 6321 6322 6323 6324 6325 6326
	/* find the first memory BAR, so we can find the cfg table */
	rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
	if (rc)
		return rc;
	vaddr = remap_pci_mem(paddr, 0x250);
	if (!vaddr)
		return -ENOMEM;
6327

6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338
	/* find cfgtable in order to check if reset via doorbell is supported */
	rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
					&cfg_base_addr_index, &cfg_offset);
	if (rc)
		goto unmap_vaddr;
	cfgtable = remap_pci_mem(pci_resource_start(pdev,
		       cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
	if (!cfgtable) {
		rc = -ENOMEM;
		goto unmap_vaddr;
	}
6339 6340
	rc = write_driver_ver_to_cfgtable(cfgtable);
	if (rc)
6341
		goto unmap_cfgtable;
6342

6343 6344 6345
	/* If reset via doorbell register is supported, use that.
	 * There are two such methods.  Favor the newest method.
	 */
6346
	misc_fw_support = readl(&cfgtable->misc_fw_support);
6347 6348 6349 6350 6351 6352
	use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
	if (use_doorbell) {
		use_doorbell = DOORBELL_CTLR_RESET2;
	} else {
		use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
		if (use_doorbell) {
6353 6354
			dev_warn(&pdev->dev,
				"Soft reset not supported. Firmware update is required.\n");
6355
			rc = -ENOTSUPP; /* try soft reset */
6356 6357 6358
			goto unmap_cfgtable;
		}
	}
6359

6360 6361 6362
	rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
	if (rc)
		goto unmap_cfgtable;
6363

6364 6365
	pci_restore_state(pdev);
	pci_write_config_word(pdev, 4, command_register);
6366

6367 6368 6369 6370
	/* Some devices (notably the HP Smart Array 5i Controller)
	   need a little pause here */
	msleep(HPSA_POST_RESET_PAUSE_MSECS);

6371 6372 6373
	rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
	if (rc) {
		dev_warn(&pdev->dev,
6374
			"Failed waiting for board to become ready after hard reset\n");
6375 6376 6377
		goto unmap_cfgtable;
	}

6378 6379 6380 6381
	rc = controller_reset_failed(vaddr);
	if (rc < 0)
		goto unmap_cfgtable;
	if (rc) {
6382 6383 6384
		dev_warn(&pdev->dev, "Unable to successfully reset "
			"controller. Will try soft reset.\n");
		rc = -ENOTSUPP;
6385
	} else {
6386
		dev_info(&pdev->dev, "board ready after hard reset.\n");
6387 6388 6389 6390 6391 6392 6393 6394
	}

unmap_cfgtable:
	iounmap(cfgtable);

unmap_vaddr:
	iounmap(vaddr);
	return rc;
6395 6396 6397 6398 6399 6400 6401
}

/*
 *  We cannot read the structure directly, for portability we must use
 *   the io functions.
 *   This is for debug only.
 */
D
Don Brace 已提交
6402
static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
6403
{
6404
#ifdef HPSA_DEBUG
6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424
	int i;
	char temp_name[17];

	dev_info(dev, "Controller Configuration information\n");
	dev_info(dev, "------------------------------------\n");
	for (i = 0; i < 4; i++)
		temp_name[i] = readb(&(tb->Signature[i]));
	temp_name[4] = '\0';
	dev_info(dev, "   Signature = %s\n", temp_name);
	dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
	dev_info(dev, "   Transport methods supported = 0x%x\n",
	       readl(&(tb->TransportSupport)));
	dev_info(dev, "   Transport methods active = 0x%x\n",
	       readl(&(tb->TransportActive)));
	dev_info(dev, "   Requested transport Method = 0x%x\n",
	       readl(&(tb->HostWrite.TransportRequest)));
	dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntDelay)));
	dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
	       readl(&(tb->HostWrite.CoalIntCount)));
6425
	dev_info(dev, "   Max outstanding commands = %d\n",
6426 6427 6428 6429 6430 6431 6432 6433 6434
	       readl(&(tb->CmdsOutMax)));
	dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
	for (i = 0; i < 16; i++)
		temp_name[i] = readb(&(tb->ServerName[i]));
	temp_name[16] = '\0';
	dev_info(dev, "   Server Name = %s\n", temp_name);
	dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
		readl(&(tb->HeartBeat)));
#endif				/* HPSA_DEBUG */
6435
}
6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471

static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
{
	int i, offset, mem_type, bar_type;

	if (pci_bar_addr == PCI_BASE_ADDRESS_0)	/* looking for BAR zero? */
		return 0;
	offset = 0;
	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
		bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
		if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
			offset += 4;
		else {
			mem_type = pci_resource_flags(pdev, i) &
			    PCI_BASE_ADDRESS_MEM_TYPE_MASK;
			switch (mem_type) {
			case PCI_BASE_ADDRESS_MEM_TYPE_32:
			case PCI_BASE_ADDRESS_MEM_TYPE_1M:
				offset += 4;	/* 32 bit */
				break;
			case PCI_BASE_ADDRESS_MEM_TYPE_64:
				offset += 8;
				break;
			default:	/* reserved in PCI 2.2 */
				dev_warn(&pdev->dev,
				       "base address is invalid\n");
				return -1;
				break;
			}
		}
		if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
			return i + 1;
	}
	return -1;
}

6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482
static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
{
	if (h->msix_vector) {
		if (h->pdev->msix_enabled)
			pci_disable_msix(h->pdev);
	} else if (h->msi_vector) {
		if (h->pdev->msi_enabled)
			pci_disable_msi(h->pdev);
	}
}

6483
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
6484
 * controllers that are capable. If not, we use legacy INTx mode.
6485
 */
6486
static void hpsa_interrupt_mode(struct ctlr_info *h)
6487 6488
{
#ifdef CONFIG_PCI_MSI
6489 6490 6491 6492 6493 6494 6495
	int err, i;
	struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];

	for (i = 0; i < MAX_REPLY_QUEUES; i++) {
		hpsa_msix_entries[i].vector = 0;
		hpsa_msix_entries[i].entry = i;
	}
6496 6497

	/* Some boards advertise MSI but don't really support it */
6498 6499
	if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
	    (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
6500
		goto default_int_mode;
6501
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
6502
		dev_info(&h->pdev->dev, "MSI-X capable controller\n");
6503
		h->msix_vector = MAX_REPLY_QUEUES;
6504 6505
		if (h->msix_vector > num_online_cpus())
			h->msix_vector = num_online_cpus();
6506 6507 6508 6509 6510 6511 6512
		err = pci_enable_msix_range(h->pdev, hpsa_msix_entries,
					    1, h->msix_vector);
		if (err < 0) {
			dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", err);
			h->msix_vector = 0;
			goto single_msi_mode;
		} else if (err < h->msix_vector) {
6513
			dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
6514 6515
			       "available\n", err);
		}
6516 6517 6518 6519
		h->msix_vector = err;
		for (i = 0; i < h->msix_vector; i++)
			h->intr[i] = hpsa_msix_entries[i].vector;
		return;
6520
	}
6521
single_msi_mode:
6522
	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
6523
		dev_info(&h->pdev->dev, "MSI capable controller\n");
6524
		if (!pci_enable_msi(h->pdev))
6525 6526
			h->msi_vector = 1;
		else
6527
			dev_warn(&h->pdev->dev, "MSI init failed\n");
6528 6529 6530 6531
	}
default_int_mode:
#endif				/* CONFIG_PCI_MSI */
	/* if we get here we're going to use the default interrupt mode */
6532
	h->intr[h->intr_mode] = h->pdev->irq;
6533 6534
}

6535
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548
{
	int i;
	u32 subsystem_vendor_id, subsystem_device_id;

	subsystem_vendor_id = pdev->subsystem_vendor;
	subsystem_device_id = pdev->subsystem_device;
	*board_id = ((subsystem_device_id << 16) & 0xffff0000) |
		    subsystem_vendor_id;

	for (i = 0; i < ARRAY_SIZE(products); i++)
		if (*board_id == products[i].board_id)
			return i;

6549 6550 6551
	if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
		subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
		!hpsa_allow_any) {
6552 6553 6554 6555 6556 6557 6558
		dev_warn(&pdev->dev, "unrecognized board ID: "
			"0x%08x, ignoring.\n", *board_id);
			return -ENODEV;
	}
	return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
}

6559 6560
static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
				    unsigned long *memory_bar)
6561 6562 6563 6564
{
	int i;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
6565
		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
6566
			/* addressing mode bits already removed */
6567 6568
			*memory_bar = pci_resource_start(pdev, i);
			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
6569 6570 6571
				*memory_bar);
			return 0;
		}
6572
	dev_warn(&pdev->dev, "no memory BAR found\n");
6573 6574 6575
	return -ENODEV;
}

6576 6577
static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
				     int wait_for_ready)
6578
{
6579
	int i, iterations;
6580
	u32 scratchpad;
6581 6582 6583 6584
	if (wait_for_ready)
		iterations = HPSA_BOARD_READY_ITERATIONS;
	else
		iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
6585

6586 6587 6588 6589 6590 6591 6592 6593 6594
	for (i = 0; i < iterations; i++) {
		scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
		if (wait_for_ready) {
			if (scratchpad == HPSA_FIRMWARE_READY)
				return 0;
		} else {
			if (scratchpad != HPSA_FIRMWARE_READY)
				return 0;
		}
6595 6596
		msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
	}
6597
	dev_warn(&pdev->dev, "board not ready, timed out.\n");
6598 6599 6600
	return -ENODEV;
}

6601 6602 6603
static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
			       u32 *cfg_base_addr, u64 *cfg_base_addr_index,
			       u64 *cfg_offset)
6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615
{
	*cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
	*cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
	*cfg_base_addr &= (u32) 0x0000ffff;
	*cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
	if (*cfg_base_addr_index == -1) {
		dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
		return -ENODEV;
	}
	return 0;
}

R
Robert Elliott 已提交
6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626
static void hpsa_free_cfgtables(struct ctlr_info *h)
{
	if (h->transtable)
		iounmap(h->transtable);
	if (h->cfgtable)
		iounmap(h->cfgtable);
}

/* Find and map CISS config table and transfer table
+ * several items must be unmapped (freed) later
+ * */
6627
static int hpsa_find_cfgtables(struct ctlr_info *h)
6628
{
6629 6630 6631
	u64 cfg_offset;
	u32 cfg_base_addr;
	u64 cfg_base_addr_index;
6632
	u32 trans_offset;
6633
	int rc;
6634

6635 6636 6637 6638
	rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
		&cfg_base_addr_index, &cfg_offset);
	if (rc)
		return rc;
6639
	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
6640
		       cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
6641 6642
	if (!h->cfgtable) {
		dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
6643
		return -ENOMEM;
6644
	}
6645 6646 6647
	rc = write_driver_ver_to_cfgtable(h->cfgtable);
	if (rc)
		return rc;
6648
	/* Find performant mode table. */
6649
	trans_offset = readl(&h->cfgtable->TransMethodOffset);
6650 6651 6652
	h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
				cfg_base_addr_index)+cfg_offset+trans_offset,
				sizeof(*h->transtable));
R
Robert Elliott 已提交
6653 6654 6655
	if (!h->transtable) {
		dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
		hpsa_free_cfgtables(h);
6656
		return -ENOMEM;
R
Robert Elliott 已提交
6657
	}
6658 6659 6660
	return 0;
}

6661
static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
6662
{
6663 6664 6665 6666
#define MIN_MAX_COMMANDS 16
	BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);

	h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
6667 6668 6669 6670 6671

	/* Limit commands in memory limited kdump scenario. */
	if (reset_devices && h->max_commands > 32)
		h->max_commands = 32;

6672 6673 6674 6675 6676 6677
	if (h->max_commands < MIN_MAX_COMMANDS) {
		dev_warn(&h->pdev->dev,
			"Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
			h->max_commands,
			MIN_MAX_COMMANDS);
		h->max_commands = MIN_MAX_COMMANDS;
6678 6679 6680
	}
}

6681 6682 6683 6684 6685 6686 6687 6688 6689
/* If the controller reports that the total max sg entries is greater than 512,
 * then we know that chained SG blocks work.  (Original smart arrays did not
 * support chained SG blocks and would return zero for max sg entries.)
 */
static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
{
	return h->maxsgentries > 512;
}

6690 6691 6692 6693
/* Interrogate the hardware for some limits:
 * max commands, max SG elements without chaining, and with chaining,
 * SG chain block size, etc.
 */
6694
static void hpsa_find_board_params(struct ctlr_info *h)
6695
{
6696
	hpsa_get_max_perf_mode_cmds(h);
6697
	h->nr_cmds = h->max_commands;
6698
	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
6699
	h->fw_support = readl(&(h->cfgtable->misc_fw_support));
6700 6701
	if (hpsa_supports_chained_sg_blocks(h)) {
		/* Limit in-command s/g elements to 32 save dma'able memory. */
6702
		h->max_cmd_sg_entries = 32;
6703
		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
6704 6705
		h->maxsgentries--; /* save one for chain pointer */
	} else {
6706 6707 6708 6709 6710 6711
		/*
		 * Original smart arrays supported at most 31 s/g entries
		 * embedded inline in the command (trying to use more
		 * would lock up the controller)
		 */
		h->max_cmd_sg_entries = 31;
6712
		h->maxsgentries = 31; /* default to traditional values */
6713
		h->chainsize = 0;
6714
	}
6715 6716 6717

	/* Find out what task management functions are supported and cache */
	h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
6718 6719 6720 6721
	if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
	if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
		dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
6722 6723
}

6724 6725
static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
{
A
Akinobu Mita 已提交
6726
	if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
6727
		dev_err(&h->pdev->dev, "not a valid CISS config table\n");
6728 6729 6730 6731 6732
		return false;
	}
	return true;
}

6733
static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
6734
{
6735
	u32 driver_support;
6736

6737
	driver_support = readl(&(h->cfgtable->driver_support));
A
Arnd Bergmann 已提交
6738 6739
	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
#ifdef CONFIG_X86
6740
	driver_support |= ENABLE_SCSI_PREFETCH;
6741
#endif
6742 6743
	driver_support |= ENABLE_UNIT_ATTN;
	writel(driver_support, &(h->cfgtable->driver_support));
6744 6745
}

6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759
/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
 * in a prefetch beyond physical memory.
 */
static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
{
	u32 dma_prefetch;

	if (h->board_id != 0x3225103C)
		return;
	dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
	dma_prefetch |= 0x8000;
	writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
}

6760
static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
6761 6762 6763 6764 6765
{
	int i;
	u32 doorbell_value;
	unsigned long flags;
	/* wait until the clear_event_notify bit 6 is cleared by controller. */
6766
	for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
6767 6768 6769 6770
		spin_lock_irqsave(&h->lock, flags);
		doorbell_value = readl(h->vaddr + SA5_DOORBELL);
		spin_unlock_irqrestore(&h->lock, flags);
		if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
6771
			goto done;
6772
		/* delay and try again */
6773
		msleep(CLEAR_EVENT_WAIT_INTERVAL);
6774
	}
6775 6776 6777
	return -ENODEV;
done:
	return 0;
6778 6779
}

6780
static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
6781 6782
{
	int i;
6783 6784
	u32 doorbell_value;
	unsigned long flags;
6785 6786 6787 6788 6789

	/* under certain very rare conditions, this can take awhile.
	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
	 * as we enter this code.)
	 */
6790
	for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
6791 6792
		if (h->remove_in_progress)
			goto done;
6793 6794 6795
		spin_lock_irqsave(&h->lock, flags);
		doorbell_value = readl(h->vaddr + SA5_DOORBELL);
		spin_unlock_irqrestore(&h->lock, flags);
D
Dan Carpenter 已提交
6796
		if (!(doorbell_value & CFGTBL_ChangeReq))
6797
			goto done;
6798
		/* delay and try again */
6799
		msleep(MODE_CHANGE_WAIT_INTERVAL);
6800
	}
6801 6802 6803
	return -ENODEV;
done:
	return 0;
6804 6805
}

6806
/* return -ENODEV or other reason on error, 0 on success */
6807
static int hpsa_enter_simple_mode(struct ctlr_info *h)
6808 6809 6810 6811 6812 6813 6814 6815
{
	u32 trans_support;

	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & SIMPLE_MODE))
		return -ENOTSUPP;

	h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
6816

6817 6818
	/* Update the field, and then ring the doorbell */
	writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
6819
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
6820
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
6821 6822
	if (hpsa_wait_for_mode_change_ack(h))
		goto error;
6823
	print_cfg_table(&h->pdev->dev, h->cfgtable);
6824 6825
	if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
		goto error;
6826
	h->transMethod = CFGTBL_Trans_Simple;
6827
	return 0;
6828
error:
6829
	dev_err(&h->pdev->dev, "failed to enter simple mode\n");
6830
	return -ENODEV;
6831 6832
}

R
Robert Elliott 已提交
6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843
/* free items allocated or mapped by hpsa_pci_init */
static void hpsa_free_pci_init(struct ctlr_info *h)
{
	hpsa_free_cfgtables(h);			/* pci_init 4 */
	iounmap(h->vaddr);			/* pci_init 3 */
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
	pci_release_regions(h->pdev);		/* pci_init 2 */
	pci_disable_device(h->pdev);		/* pci_init 1 */
}

/* several items must be freed later */
6844
static int hpsa_pci_init(struct ctlr_info *h)
6845
{
6846
	int prod_index, err;
6847

6848 6849
	prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
	if (prod_index < 0)
6850
		return prod_index;
6851 6852
	h->product_name = products[prod_index].product_name;
	h->access = *(products[prod_index].access);
6853

S
Stephen Cameron 已提交
6854 6855 6856
	h->needs_abort_tags_swizzled =
		ctlr_needs_abort_tags_swizzled(h->board_id);

M
Matthew Garrett 已提交
6857 6858 6859
	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);

6860
	err = pci_enable_device(h->pdev);
6861
	if (err) {
R
Robert Elliott 已提交
6862
		dev_err(&h->pdev->dev, "failed to enable PCI device\n");
6863 6864 6865
		return err;
	}

6866
	err = pci_request_regions(h->pdev, HPSA);
6867
	if (err) {
6868
		dev_err(&h->pdev->dev,
R
Robert Elliott 已提交
6869 6870
			"failed to obtain PCI resources\n");
		goto clean1;	/* pci */
6871
	}
6872 6873 6874

	pci_set_master(h->pdev);

6875
	hpsa_interrupt_mode(h);
6876
	err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
6877
	if (err)
R
Robert Elliott 已提交
6878
		goto clean2;	/* intmode+region, pci */
6879
	h->vaddr = remap_pci_mem(h->paddr, 0x250);
6880
	if (!h->vaddr) {
R
Robert Elliott 已提交
6881
		dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
6882
		err = -ENOMEM;
R
Robert Elliott 已提交
6883
		goto clean2;	/* intmode+region, pci */
6884
	}
6885
	err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
6886
	if (err)
R
Robert Elliott 已提交
6887
		goto clean3;	/* vaddr, intmode+region, pci */
6888 6889
	err = hpsa_find_cfgtables(h);
	if (err)
R
Robert Elliott 已提交
6890
		goto clean3;	/* vaddr, intmode+region, pci */
6891
	hpsa_find_board_params(h);
6892

6893
	if (!hpsa_CISS_signature_present(h)) {
6894
		err = -ENODEV;
R
Robert Elliott 已提交
6895
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
6896
	}
6897
	hpsa_set_driver_support_bits(h);
6898
	hpsa_p600_dma_prefetch_quirk(h);
6899 6900
	err = hpsa_enter_simple_mode(h);
	if (err)
R
Robert Elliott 已提交
6901
		goto clean4;	/* cfgtables, vaddr, intmode+region, pci */
6902 6903
	return 0;

R
Robert Elliott 已提交
6904 6905 6906 6907 6908 6909
clean4:	/* cfgtables, vaddr, intmode+region, pci */
	hpsa_free_cfgtables(h);
clean3:	/* vaddr, intmode+region, pci */
	iounmap(h->vaddr);
clean2:	/* intmode+region, pci */
	hpsa_disable_interrupt_mode(h);
6910
	pci_release_regions(h->pdev);
R
Robert Elliott 已提交
6911 6912
clean1:	/* pci */
	pci_disable_device(h->pdev);
6913 6914 6915
	return err;
}

6916
static void hpsa_hba_inquiry(struct ctlr_info *h)
6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931
{
	int rc;

#define HBA_INQUIRY_BYTE_COUNT 64
	h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
	if (!h->hba_inquiry_data)
		return;
	rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
		h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
	if (rc != 0) {
		kfree(h->hba_inquiry_data);
		h->hba_inquiry_data = NULL;
	}
}

6932
static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
6933
{
6934
	int rc, i;
6935
	void __iomem *vaddr;
6936 6937 6938 6939

	if (!reset_devices)
		return 0;

6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955
	/* kdump kernel is loading, we don't know in which state is
	 * the pci interface. The dev->enable_cnt is equal zero
	 * so we call enable+disable, wait a while and switch it on.
	 */
	rc = pci_enable_device(pdev);
	if (rc) {
		dev_warn(&pdev->dev, "Failed to enable PCI device\n");
		return -ENODEV;
	}
	pci_disable_device(pdev);
	msleep(260);			/* a randomly chosen number */
	rc = pci_enable_device(pdev);
	if (rc) {
		dev_warn(&pdev->dev, "failed to enable device.\n");
		return -ENODEV;
	}
6956

6957
	pci_set_master(pdev);
6958

6959 6960 6961 6962 6963 6964 6965 6966
	vaddr = pci_ioremap_bar(pdev, 0);
	if (vaddr == NULL) {
		rc = -ENOMEM;
		goto out_disable;
	}
	writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
	iounmap(vaddr);

6967
	/* Reset the controller with a PCI power-cycle or via doorbell */
6968
	rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
6969

6970 6971
	/* -ENOTSUPP here means we cannot reset the controller
	 * but it's already (and still) up and running in
6972 6973
	 * "performant mode".  Or, it might be 640x, which can't reset
	 * due to concerns about shared bbwc between 6402/6404 pair.
6974
	 */
6975
	if (rc)
6976
		goto out_disable;
6977 6978

	/* Now try to get the controller to respond to a no-op */
6979
	dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
6980 6981 6982 6983 6984 6985 6986
	for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
		if (hpsa_noop(pdev) == 0)
			break;
		else
			dev_warn(&pdev->dev, "no-op failed%s\n",
					(i < 11 ? "; re-trying" : ""));
	}
6987 6988 6989 6990 6991

out_disable:

	pci_disable_device(pdev);
	return rc;
6992 6993
}

6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008
static void hpsa_free_cmd_pool(struct ctlr_info *h)
{
	kfree(h->cmd_pool_bits);
	if (h->cmd_pool)
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct CommandList),
				h->cmd_pool,
				h->cmd_pool_dhandle);
	if (h->errinfo_pool)
		pci_free_consistent(h->pdev,
				h->nr_cmds * sizeof(struct ErrorInfo),
				h->errinfo_pool,
				h->errinfo_pool_dhandle);
}

7009
static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023
{
	h->cmd_pool_bits = kzalloc(
		DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
		sizeof(unsigned long), GFP_KERNEL);
	h->cmd_pool = pci_alloc_consistent(h->pdev,
		    h->nr_cmds * sizeof(*h->cmd_pool),
		    &(h->cmd_pool_dhandle));
	h->errinfo_pool = pci_alloc_consistent(h->pdev,
		    h->nr_cmds * sizeof(*h->errinfo_pool),
		    &(h->errinfo_pool_dhandle));
	if ((h->cmd_pool_bits == NULL)
	    || (h->cmd_pool == NULL)
	    || (h->errinfo_pool == NULL)) {
		dev_err(&h->pdev->dev, "out of memory in %s", __func__);
7024
		goto clean_up;
7025
	}
7026
	hpsa_preinitialize_commands(h);
7027
	return 0;
7028 7029 7030
clean_up:
	hpsa_free_cmd_pool(h);
	return -ENOMEM;
7031 7032
}

7033 7034
static void hpsa_irq_affinity_hints(struct ctlr_info *h)
{
7035
	int i, cpu;
7036 7037 7038

	cpu = cpumask_first(cpu_online_mask);
	for (i = 0; i < h->msix_vector; i++) {
7039
		irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu));
7040 7041 7042 7043
		cpu = cpumask_next(cpu, cpu_online_mask);
	}
}

7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060
/* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
static void hpsa_free_irqs(struct ctlr_info *h)
{
	int i;

	if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
		/* Single reply queue, only one irq to free */
		i = h->intr_mode;
		irq_set_affinity_hint(h->intr[i], NULL);
		free_irq(h->intr[i], &h->q[i]);
		return;
	}

	for (i = 0; i < h->msix_vector; i++) {
		irq_set_affinity_hint(h->intr[i], NULL);
		free_irq(h->intr[i], &h->q[i]);
	}
7061 7062
	for (; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = 0;
7063 7064
}

7065 7066
/* returns 0 on success; cleans up and returns -Enn on error */
static int hpsa_request_irqs(struct ctlr_info *h,
7067 7068 7069
	irqreturn_t (*msixhandler)(int, void *),
	irqreturn_t (*intxhandler)(int, void *))
{
7070
	int rc, i;
7071

7072 7073 7074 7075 7076 7077 7078
	/*
	 * initialize h->q[x] = x so that interrupt handlers know which
	 * queue to process.
	 */
	for (i = 0; i < MAX_REPLY_QUEUES; i++)
		h->q[i] = (u8) i;

7079
	if (h->intr_mode == PERF_MODE_INT && h->msix_vector > 0) {
7080
		/* If performant mode and MSI-X, use multiple reply queues */
7081
		for (i = 0; i < h->msix_vector; i++) {
7082 7083 7084
			rc = request_irq(h->intr[i], msixhandler,
					0, h->devname,
					&h->q[i]);
7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099
			if (rc) {
				int j;

				dev_err(&h->pdev->dev,
					"failed to get irq %d for %s\n",
				       h->intr[i], h->devname);
				for (j = 0; j < i; j++) {
					free_irq(h->intr[j], &h->q[j]);
					h->q[j] = 0;
				}
				for (; j < MAX_REPLY_QUEUES; j++)
					h->q[j] = 0;
				return rc;
			}
		}
7100
		hpsa_irq_affinity_hints(h);
7101 7102
	} else {
		/* Use single reply pool */
7103
		if (h->msix_vector > 0 || h->msi_vector) {
7104 7105 7106 7107 7108 7109 7110 7111 7112
			rc = request_irq(h->intr[h->intr_mode],
				msixhandler, 0, h->devname,
				&h->q[h->intr_mode]);
		} else {
			rc = request_irq(h->intr[h->intr_mode],
				intxhandler, IRQF_SHARED, h->devname,
				&h->q[h->intr_mode]);
		}
	}
7113
	if (rc) {
R
Robert Elliott 已提交
7114
		dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
7115
		       h->intr[h->intr_mode], h->devname);
R
Robert Elliott 已提交
7116
		hpsa_free_irqs(h);
7117 7118 7119 7120 7121
		return -ENODEV;
	}
	return 0;
}

7122
static int hpsa_kdump_soft_reset(struct ctlr_info *h)
7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145
{
	if (hpsa_send_host_reset(h, RAID_CTLR_LUNID,
		HPSA_RESET_TYPE_CONTROLLER)) {
		dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
		return -EIO;
	}

	dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
	if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
		dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
		return -1;
	}

	dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
	if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
		dev_warn(&h->pdev->dev, "Board failed to become ready "
			"after soft reset.\n");
		return -1;
	}

	return 0;
}

7146 7147 7148 7149 7150 7151 7152
static void hpsa_free_reply_queues(struct ctlr_info *h)
{
	int i;

	for (i = 0; i < h->nreply_queues; i++) {
		if (!h->reply_queue[i].head)
			continue;
7153 7154 7155 7156
		pci_free_consistent(h->pdev,
					h->reply_queue_size,
					h->reply_queue[i].head,
					h->reply_queue[i].busaddr);
7157 7158 7159 7160 7161
		h->reply_queue[i].head = NULL;
		h->reply_queue[i].busaddr = 0;
	}
}

7162 7163
static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
{
7164
	hpsa_free_irqs(h);
7165 7166
	hpsa_free_sg_chain_blocks(h);
	hpsa_free_cmd_pool(h);
7167 7168 7169 7170
	kfree(h->blockFetchTable);		/* perf 2 */
	hpsa_free_reply_queues(h);		/* perf 1 */
	hpsa_free_ioaccel1_cmd_and_bft(h);	/* perf 1 */
	hpsa_free_ioaccel2_cmd_and_bft(h);	/* perf 1 */
R
Robert Elliott 已提交
7171 7172 7173
	hpsa_free_cfgtables(h);			/* pci_init 4 */
	iounmap(h->vaddr);			/* pci_init 3 */
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
7174
	pci_disable_device(h->pdev);
R
Robert Elliott 已提交
7175
	pci_release_regions(h->pdev);		/* pci_init 2 */
7176 7177 7178
	kfree(h);
}

7179
/* Called when controller lockup detected. */
7180
static void fail_all_outstanding_cmds(struct ctlr_info *h)
7181
{
7182 7183
	int i, refcount;
	struct CommandList *c;
7184
	int failcount = 0;
7185

7186
	flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
7187 7188
	for (i = 0; i < h->nr_cmds; i++) {
		c = h->cmd_pool + i;
7189 7190
		refcount = atomic_inc_return(&c->refcount);
		if (refcount > 1) {
7191
			c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
7192
			finish_cmd(c);
7193
			atomic_dec(&h->commands_outstanding);
7194
			failcount++;
7195 7196
		}
		cmd_free(h, c);
7197
	}
7198 7199
	dev_warn(&h->pdev->dev,
		"failed %d commands in fail_all\n", failcount);
7200 7201
}

7202 7203
static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
{
7204
	int cpu;
7205

7206
	for_each_online_cpu(cpu) {
7207 7208 7209 7210 7211 7212 7213
		u32 *lockup_detected;
		lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
		*lockup_detected = value;
	}
	wmb(); /* be sure the per-cpu variables are out to memory */
}

7214 7215 7216
static void controller_lockup_detected(struct ctlr_info *h)
{
	unsigned long flags;
7217
	u32 lockup_detected;
7218 7219 7220

	h->access.set_intr_mask(h, HPSA_INTR_OFF);
	spin_lock_irqsave(&h->lock, flags);
7221 7222 7223 7224
	lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
	if (!lockup_detected) {
		/* no heartbeat, but controller gave us a zero. */
		dev_warn(&h->pdev->dev,
7225 7226
			"lockup detected after %d but scratchpad register is zero\n",
			h->heartbeat_sample_interval / HZ);
7227 7228 7229
		lockup_detected = 0xffffffff;
	}
	set_lockup_detected_for_all_cpus(h, lockup_detected);
7230
	spin_unlock_irqrestore(&h->lock, flags);
7231 7232
	dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
			lockup_detected, h->heartbeat_sample_interval / HZ);
7233
	pci_disable_device(h->pdev);
7234
	fail_all_outstanding_cmds(h);
7235 7236
}

7237
static int detect_controller_lockup(struct ctlr_info *h)
7238 7239 7240 7241 7242 7243 7244 7245
{
	u64 now;
	u32 heartbeat;
	unsigned long flags;

	now = get_jiffies_64();
	/* If we've received an interrupt recently, we're ok. */
	if (time_after64(h->last_intr_timestamp +
7246
				(h->heartbeat_sample_interval), now))
7247
		return false;
7248 7249 7250 7251 7252 7253 7254

	/*
	 * If we've already checked the heartbeat recently, we're ok.
	 * This could happen if someone sends us a signal. We
	 * otherwise don't care about signals in this thread.
	 */
	if (time_after64(h->last_heartbeat_timestamp +
7255
				(h->heartbeat_sample_interval), now))
7256
		return false;
7257 7258 7259 7260 7261 7262 7263

	/* If heartbeat has not changed since we last looked, we're not ok. */
	spin_lock_irqsave(&h->lock, flags);
	heartbeat = readl(&h->cfgtable->HeartBeat);
	spin_unlock_irqrestore(&h->lock, flags);
	if (h->last_heartbeat == heartbeat) {
		controller_lockup_detected(h);
7264
		return true;
7265 7266 7267 7268 7269
	}

	/* We're ok. */
	h->last_heartbeat = heartbeat;
	h->last_heartbeat_timestamp = now;
7270
	return false;
7271 7272
}

7273
static void hpsa_ack_ctlr_events(struct ctlr_info *h)
7274 7275 7276 7277
{
	int i;
	char *event_type;

7278 7279 7280
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
		return;

7281
	/* Ask the controller to clear the events we're handling. */
7282 7283
	if ((h->transMethod & (CFGTBL_Trans_io_accel1
			| CFGTBL_Trans_io_accel2)) &&
7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294
		(h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
		 h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {

		if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
			event_type = "state change";
		if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
			event_type = "configuration change";
		/* Stop sending new RAID offload reqs via the IO accelerator */
		scsi_block_requests(h->scsi_host);
		for (i = 0; i < h->ndevices; i++)
			h->dev[i]->offload_enabled = 0;
7295
		hpsa_drain_accel_commands(h);
7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309 7310 7311 7312 7313 7314 7315
		/* Set 'accelerator path config change' bit */
		dev_warn(&h->pdev->dev,
			"Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
			h->events, event_type);
		writel(h->events, &(h->cfgtable->clear_event_notify));
		/* Set the "clear event notify field update" bit 6 */
		writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
		/* Wait until ctlr clears 'clear event notify field', bit 6 */
		hpsa_wait_for_clear_event_notify_ack(h);
		scsi_unblock_requests(h->scsi_host);
	} else {
		/* Acknowledge controller notification events. */
		writel(h->events, &(h->cfgtable->clear_event_notify));
		writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
		hpsa_wait_for_clear_event_notify_ack(h);
#if 0
		writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
		hpsa_wait_for_mode_change_ack(h);
#endif
	}
7316
	return;
7317 7318 7319 7320
}

/* Check a register on the controller to see if there are configuration
 * changes (added/changed/removed logical drives, etc.) which mean that
7321 7322
 * we should rescan the controller for devices.
 * Also check flag for driver-initiated rescan.
7323
 */
7324
static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
7325 7326
{
	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
7327
		return 0;
7328 7329

	h->events = readl(&(h->cfgtable->event_notify));
7330 7331
	return h->events & RESCAN_REQUIRED_EVENT_BITS;
}
7332

7333 7334 7335 7336 7337 7338 7339 7340 7341 7342 7343 7344 7345 7346
/*
 * Check if any of the offline devices have become ready
 */
static int hpsa_offline_devices_ready(struct ctlr_info *h)
{
	unsigned long flags;
	struct offline_device_entry *d;
	struct list_head *this, *tmp;

	spin_lock_irqsave(&h->offline_device_lock, flags);
	list_for_each_safe(this, tmp, &h->offline_device_list) {
		d = list_entry(this, struct offline_device_entry,
				offline_list);
		spin_unlock_irqrestore(&h->offline_device_lock, flags);
7347 7348 7349 7350
		if (!hpsa_volume_offline(h, d->scsi3addr)) {
			spin_lock_irqsave(&h->offline_device_lock, flags);
			list_del(&d->offline_list);
			spin_unlock_irqrestore(&h->offline_device_lock, flags);
7351
			return 1;
7352
		}
7353 7354 7355 7356
		spin_lock_irqsave(&h->offline_device_lock, flags);
	}
	spin_unlock_irqrestore(&h->offline_device_lock, flags);
	return 0;
7357 7358
}

7359
static void hpsa_rescan_ctlr_worker(struct work_struct *work)
7360 7361
{
	unsigned long flags;
7362
	struct ctlr_info *h = container_of(to_delayed_work(work),
7363 7364 7365 7366
					struct ctlr_info, rescan_ctlr_work);


	if (h->remove_in_progress)
7367
		return;
7368 7369 7370 7371 7372 7373 7374

	if (hpsa_ctlr_needs_rescan(h) || hpsa_offline_devices_ready(h)) {
		scsi_host_get(h->scsi_host);
		hpsa_ack_ctlr_events(h);
		hpsa_scan_start(h->scsi_host);
		scsi_host_put(h->scsi_host);
	}
7375
	spin_lock_irqsave(&h->lock, flags);
7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389
	if (!h->remove_in_progress)
		queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
}

static void hpsa_monitor_ctlr_worker(struct work_struct *work)
{
	unsigned long flags;
	struct ctlr_info *h = container_of(to_delayed_work(work),
					struct ctlr_info, monitor_ctlr_work);

	detect_controller_lockup(h);
	if (lockup_detected(h))
7390
		return;
7391 7392 7393 7394

	spin_lock_irqsave(&h->lock, flags);
	if (!h->remove_in_progress)
		schedule_delayed_work(&h->monitor_ctlr_work,
7395 7396
				h->heartbeat_sample_interval);
	spin_unlock_irqrestore(&h->lock, flags);
7397 7398
}

7399 7400 7401 7402 7403
static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
						char *name)
{
	struct workqueue_struct *wq = NULL;

7404
	wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
7405 7406 7407 7408 7409 7410
	if (!wq)
		dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);

	return wq;
}

7411
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
7412
{
7413
	int dac, rc;
7414
	struct ctlr_info *h;
7415 7416
	int try_soft_reset = 0;
	unsigned long flags;
7417
	u32 board_id;
7418 7419 7420 7421

	if (number_of_controllers == 0)
		printk(KERN_INFO DRIVER_NAME "\n");

7422 7423 7424 7425 7426 7427 7428
	rc = hpsa_lookup_board_id(pdev, &board_id);
	if (rc < 0) {
		dev_warn(&pdev->dev, "Board ID not found\n");
		return rc;
	}

	rc = hpsa_init_reset_devices(pdev, board_id);
7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441
	if (rc) {
		if (rc != -ENOTSUPP)
			return rc;
		/* If the reset fails in a particular way (it has no way to do
		 * a proper hard reset, so returns -ENOTSUPP) we can try to do
		 * a soft reset once we get the controller configured up to the
		 * point that it can accept a command.
		 */
		try_soft_reset = 1;
		rc = 0;
	}

reinit_after_soft_reset:
7442

7443 7444 7445 7446 7447
	/* Command structures must be aligned on a 32-byte boundary because
	 * the 5 lower bits of the address are used by the hardware. and by
	 * the driver.  See comments in hpsa.h for more info.
	 */
	BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
7448 7449
	h = kzalloc(sizeof(*h), GFP_KERNEL);
	if (!h)
7450
		return -ENOMEM;
7451

7452
	h->pdev = pdev;
7453
	h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
7454
	INIT_LIST_HEAD(&h->offline_device_list);
7455
	spin_lock_init(&h->lock);
7456
	spin_lock_init(&h->offline_device_lock);
7457
	spin_lock_init(&h->scan_lock);
7458
	atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
S
Stephen Cameron 已提交
7459
	atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
7460

7461 7462 7463 7464 7465 7466 7467
	h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
	if (!h->rescan_ctlr_wq) {
		rc = -ENOMEM;
		goto clean1;
	}

	h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
7468 7469 7470 7471
	if (!h->resubmit_wq) {
		rc = -ENOMEM;
		goto clean1;
	}
7472

7473 7474
	/* Allocate and clear per-cpu variable lockup_detected */
	h->lockup_detected = alloc_percpu(u32);
7475 7476
	if (!h->lockup_detected) {
		rc = -ENOMEM;
7477
		goto clean1;
7478
	}
7479 7480
	set_lockup_detected_for_all_cpus(h, 0);

7481
	rc = hpsa_pci_init(h);
7482
	if (rc != 0)
7483 7484
		goto clean1;

7485
	sprintf(h->devname, HPSA "%d", number_of_controllers);
7486 7487 7488 7489
	h->ctlr = number_of_controllers;
	number_of_controllers++;

	/* configure PCI DMA stuff */
7490 7491
	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (rc == 0) {
7492
		dac = 1;
7493 7494 7495 7496 7497 7498
	} else {
		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (rc == 0) {
			dac = 0;
		} else {
			dev_err(&pdev->dev, "no suitable DMA available\n");
R
Robert Elliott 已提交
7499
			goto clean2;
7500
		}
7501 7502 7503 7504
	}

	/* make sure the board interrupts are off */
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
7505

7506
	if (hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx))
7507
		goto clean2;
7508 7509
	dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n",
	       h->devname, pdev->device,
7510
	       h->intr[h->intr_mode], dac ? "" : " not");
7511
	rc = hpsa_alloc_cmd_pool(h);
7512 7513
	if (rc)
		goto clean2_and_free_irqs;
7514 7515
	if (hpsa_allocate_sg_chain_blocks(h))
		goto clean4;
7516
	init_waitqueue_head(&h->scan_wait_queue);
S
Stephen Cameron 已提交
7517
	init_waitqueue_head(&h->abort_cmd_wait_queue);
7518
	h->scan_finished = 1; /* no scan currently in progress */
7519 7520

	pci_set_drvdata(pdev, h);
7521
	h->ndevices = 0;
7522
	h->hba_mode_enabled = 0;
7523 7524
	h->scsi_host = NULL;
	spin_lock_init(&h->devlock);
7525 7526 7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542
	hpsa_put_ctlr_into_performant_mode(h);

	/* At this point, the controller is ready to take commands.
	 * Now, if reset_devices and the hard reset didn't work, try
	 * the soft reset and see if that works.
	 */
	if (try_soft_reset) {

		/* This is kind of gross.  We may or may not get a completion
		 * from the soft reset command, and if we do, then the value
		 * from the fifo may or may not be valid.  So, we wait 10 secs
		 * after the reset throwing away any completions we get during
		 * that time.  Unregister the interrupt handler and register
		 * fake ones to scoop up any residual completions.
		 */
		spin_lock_irqsave(&h->lock, flags);
		h->access.set_intr_mask(h, HPSA_INTR_OFF);
		spin_unlock_irqrestore(&h->lock, flags);
7543
		hpsa_free_irqs(h);
7544
		rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
7545 7546
					hpsa_intx_discard_completions);
		if (rc) {
7547 7548
			dev_warn(&h->pdev->dev,
				"Failed to request_irq after soft reset.\n");
7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580
			goto clean4;
		}

		rc = hpsa_kdump_soft_reset(h);
		if (rc)
			/* Neither hard nor soft reset worked, we're hosed. */
			goto clean4;

		dev_info(&h->pdev->dev, "Board READY.\n");
		dev_info(&h->pdev->dev,
			"Waiting for stale completions to drain.\n");
		h->access.set_intr_mask(h, HPSA_INTR_ON);
		msleep(10000);
		h->access.set_intr_mask(h, HPSA_INTR_OFF);

		rc = controller_reset_failed(h->cfgtable);
		if (rc)
			dev_info(&h->pdev->dev,
				"Soft reset appears to have failed.\n");

		/* since the controller's reset, we have to go back and re-init
		 * everything.  Easiest to just forget what we've done and do it
		 * all over again.
		 */
		hpsa_undo_allocations_after_kdump_soft_reset(h);
		try_soft_reset = 0;
		if (rc)
			/* don't go to clean4, we already unallocated */
			return -ENODEV;

		goto reinit_after_soft_reset;
	}
7581

7582 7583
		/* Enable Accelerated IO path at driver layer */
		h->acciopath_status = 1;
7584

7585

7586 7587 7588
	/* Turn the interrupts on so we can service requests */
	h->access.set_intr_mask(h, HPSA_INTR_ON);

7589
	hpsa_hba_inquiry(h);
7590 7591 7592
	rc = hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
	if (rc)
		goto clean4;
7593 7594 7595 7596 7597 7598

	/* Monitor the controller for firmware lockups */
	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
	INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
	schedule_delayed_work(&h->monitor_ctlr_work,
				h->heartbeat_sample_interval);
7599 7600 7601
	INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
	queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
				h->heartbeat_sample_interval);
7602
	return 0;
7603 7604

clean4:
7605
	hpsa_free_sg_chain_blocks(h);
7606
	hpsa_free_cmd_pool(h);
7607 7608
	hpsa_free_ioaccel1_cmd_and_bft(h);
	hpsa_free_ioaccel2_cmd_and_bft(h);
7609
clean2_and_free_irqs:
7610
	hpsa_free_irqs(h);
7611
clean2:
R
Robert Elliott 已提交
7612
	hpsa_free_pci_init(h);
7613
clean1:
7614 7615
	if (h->resubmit_wq)
		destroy_workqueue(h->resubmit_wq);
7616 7617
	if (h->rescan_ctlr_wq)
		destroy_workqueue(h->rescan_ctlr_wq);
7618 7619
	if (h->lockup_detected)
		free_percpu(h->lockup_detected);
7620
	kfree(h);
7621
	return rc;
7622 7623 7624 7625 7626 7627
}

static void hpsa_flush_cache(struct ctlr_info *h)
{
	char *flush_buf;
	struct CommandList *c;
7628
	int rc;
7629 7630

	/* Don't bother trying to flush the cache if locked up */
7631
	/* FIXME not necessary if do_simple_cmd does the check */
7632
	if (unlikely(lockup_detected(h)))
7633
		return;
7634 7635 7636 7637
	flush_buf = kzalloc(4, GFP_KERNEL);
	if (!flush_buf)
		return;

7638
	c = cmd_alloc(h);
7639
	if (!c) {
7640
		dev_warn(&h->pdev->dev, "cmd_alloc returned NULL!\n");
7641 7642
		goto out_of_memory;
	}
7643 7644 7645 7646
	if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
		RAID_CTLR_LUNID, TYPE_CMD)) {
		goto out;
	}
7647 7648 7649 7650
	rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
					PCI_DMA_TODEVICE, NO_TIMEOUT);
	if (rc)
		goto out;
7651
	if (c->err_info->CommandStatus != 0)
7652
out:
7653 7654
		dev_warn(&h->pdev->dev,
			"error flushing cache on controller\n");
7655
	cmd_free(h, c);
7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670
out_of_memory:
	kfree(flush_buf);
}

static void hpsa_shutdown(struct pci_dev *pdev)
{
	struct ctlr_info *h;

	h = pci_get_drvdata(pdev);
	/* Turn board interrupts off  and send the flush cache command
	 * sendcmd will turn off interrupt, and send the flush...
	 * To write all data in the battery backed cache to disks
	 */
	hpsa_flush_cache(h);
	h->access.set_intr_mask(h, HPSA_INTR_OFF);
7671 7672
	hpsa_free_irqs(h);
	hpsa_disable_interrupt_mode(h);		/* pci_init 2 */
7673 7674
}

7675
static void hpsa_free_device_info(struct ctlr_info *h)
7676 7677 7678 7679 7680 7681 7682
{
	int i;

	for (i = 0; i < h->ndevices; i++)
		kfree(h->dev[i]);
}

7683
static void hpsa_remove_one(struct pci_dev *pdev)
7684 7685
{
	struct ctlr_info *h;
7686
	unsigned long flags;
7687 7688

	if (pci_get_drvdata(pdev) == NULL) {
7689
		dev_err(&pdev->dev, "unable to remove device\n");
7690 7691 7692
		return;
	}
	h = pci_get_drvdata(pdev);
7693 7694 7695 7696 7697

	/* Get rid of any controller monitoring work items */
	spin_lock_irqsave(&h->lock, flags);
	h->remove_in_progress = 1;
	spin_unlock_irqrestore(&h->lock, flags);
7698 7699 7700 7701
	cancel_delayed_work_sync(&h->monitor_ctlr_work);
	cancel_delayed_work_sync(&h->rescan_ctlr_work);
	destroy_workqueue(h->rescan_ctlr_wq);
	destroy_workqueue(h->resubmit_wq);
7702
	hpsa_unregister_scsi(h);	/* unhook from SCSI subsystem */
7703

R
Robert Elliott 已提交
7704 7705
	/* includes hpsa_free_irqs */
	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
7706
	hpsa_shutdown(pdev);
7707

7708
	hpsa_free_device_info(h);
7709
	hpsa_free_sg_chain_blocks(h);
7710 7711 7712 7713 7714
	kfree(h->blockFetchTable);		/* perf 2 */
	hpsa_free_reply_queues(h);		/* perf 1 */
	hpsa_free_ioaccel1_cmd_and_bft(h);	/* perf 1 */
	hpsa_free_ioaccel2_cmd_and_bft(h);	/* perf 1 */
	hpsa_free_cmd_pool(h);			/* init_one 5 */
7715
	kfree(h->hba_inquiry_data);
R
Robert Elliott 已提交
7716 7717 7718 7719

	/* includes hpsa_disable_interrupt_mode - pci_init 2 */
	hpsa_free_pci_init(h);

7720
	free_percpu(h->lockup_detected);
7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733 7734 7735
	kfree(h);
}

static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
	__attribute__((unused)) pm_message_t state)
{
	return -ENOSYS;
}

static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
{
	return -ENOSYS;
}

static struct pci_driver hpsa_pci_driver = {
7736
	.name = HPSA,
7737
	.probe = hpsa_init_one,
7738
	.remove = hpsa_remove_one,
7739 7740 7741 7742 7743 7744
	.id_table = hpsa_pci_device_id,	/* id_table */
	.shutdown = hpsa_shutdown,
	.suspend = hpsa_suspend,
	.resume = hpsa_resume,
};

7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757
/* Fill in bucket_map[], given nsgs (the max number of
 * scatter gather elements supported) and bucket[],
 * which is an array of 8 integers.  The bucket[] array
 * contains 8 different DMA transfer sizes (in 16
 * byte increments) which the controller uses to fetch
 * commands.  This function fills in bucket_map[], which
 * maps a given number of scatter gather elements to one of
 * the 8 DMA transfer sizes.  The point of it is to allow the
 * controller to only do as much DMA as needed to fetch the
 * command, with the DMA transfer size encoded in the lower
 * bits of the command address.
 */
static void  calc_bucket_map(int bucket[], int num_buckets,
D
Don Brace 已提交
7758
	int nsgs, int min_blocks, u32 *bucket_map)
7759 7760 7761 7762 7763 7764
{
	int i, j, b, size;

	/* Note, bucket_map must have nsgs+1 entries. */
	for (i = 0; i <= nsgs; i++) {
		/* Compute size of a command with i SG entries */
7765
		size = i + min_blocks;
7766 7767
		b = num_buckets; /* Assume the biggest bucket */
		/* Find the bucket that is just big enough */
7768
		for (j = 0; j < num_buckets; j++) {
7769 7770 7771 7772 7773 7774 7775 7776 7777 7778
			if (bucket[j] >= size) {
				b = j;
				break;
			}
		}
		/* for a command with i SG entries, use bucket b. */
		bucket_map[i] = b;
	}
}

7779 7780
/* return -ENODEV or other reason on error, 0 on success */
static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
7781
{
7782 7783
	int i;
	unsigned long register_value;
7784 7785
	unsigned long transMethod = CFGTBL_Trans_Performant |
			(trans_support & CFGTBL_Trans_use_short_tags) |
7786 7787 7788
				CFGTBL_Trans_enable_directed_msix |
			(trans_support & (CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_io_accel2));
7789
	struct access_method access = SA5_performant_access;
7790 7791 7792 7793 7794 7795 7796 7797 7798 7799 7800

	/* This is a bit complicated.  There are 8 registers on
	 * the controller which we write to to tell it 8 different
	 * sizes of commands which there may be.  It's a way of
	 * reducing the DMA done to fetch each command.  Encoded into
	 * each command's tag are 3 bits which communicate to the controller
	 * which of the eight sizes that command fits within.  The size of
	 * each command depends on how many scatter gather entries there are.
	 * Each SG entry requires 16 bytes.  The eight registers are programmed
	 * with the number of 16-byte blocks a command of that size requires.
	 * The smallest command possible requires 5 such 16 byte blocks.
7801
	 * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
7802 7803 7804 7805 7806 7807
	 * blocks.  Note, this only extends to the SG entries contained
	 * within the command block, and does not extend to chained blocks
	 * of SG elements.   bft[] contains the eight values we write to
	 * the registers.  They are not evenly distributed, but have more
	 * sizes for small commands, and fewer sizes for larger commands.
	 */
7808
	int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
7809 7810 7811 7812 7813 7814 7815 7816 7817 7818
#define MIN_IOACCEL2_BFT_ENTRY 5
#define HPSA_IOACCEL2_HEADER_SZ 4
	int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
			13, 14, 15, 16, 17, 18, 19,
			HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
	BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
	BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
	BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
				 16 * MIN_IOACCEL2_BFT_ENTRY);
	BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
7819
	BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
7820 7821 7822 7823 7824 7825
	/*  5 = 1 s/g entry or 4k
	 *  6 = 2 s/g entry or 8k
	 *  8 = 4 s/g entry or 16k
	 * 10 = 6 s/g entry or 24k
	 */

7826 7827 7828 7829 7830 7831 7832
	/* If the controller supports either ioaccel method then
	 * we can also use the RAID stack submit path that does not
	 * perform the superfluous readl() after each command submission.
	 */
	if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
		access = SA5_performant_access_no_read;

7833
	/* Controller spec: zero out this buffer. */
7834 7835
	for (i = 0; i < h->nreply_queues; i++)
		memset(h->reply_queue[i].head, 0, h->reply_queue_size);
7836

7837 7838
	bft[7] = SG_ENTRIES_IN_CMD + 4;
	calc_bucket_map(bft, ARRAY_SIZE(bft),
7839
				SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
7840 7841 7842 7843 7844
	for (i = 0; i < 8; i++)
		writel(bft[i], &h->transtable->BlockFetch[i]);

	/* size of controller ring buffer */
	writel(h->max_commands, &h->transtable->RepQSize);
7845
	writel(h->nreply_queues, &h->transtable->RepQCount);
7846 7847
	writel(0, &h->transtable->RepQCtrAddrLow32);
	writel(0, &h->transtable->RepQCtrAddrHigh32);
7848 7849 7850

	for (i = 0; i < h->nreply_queues; i++) {
		writel(0, &h->transtable->RepQAddr[i].upper);
7851
		writel(h->reply_queue[i].busaddr,
7852 7853 7854
			&h->transtable->RepQAddr[i].lower);
	}

7855
	writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
7856 7857 7858 7859 7860 7861 7862 7863
	writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
	/*
	 * enable outbound interrupt coalescing in accelerator mode;
	 */
	if (trans_support & CFGTBL_Trans_io_accel1) {
		access = SA5_ioaccel_mode1_access;
		writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
		writel(4, &h->cfgtable->HostWrite.CoalIntCount);
7864 7865 7866 7867 7868 7869
	} else {
		if (trans_support & CFGTBL_Trans_io_accel2) {
			access = SA5_ioaccel_mode2_access;
			writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
			writel(4, &h->cfgtable->HostWrite.CoalIntCount);
		}
7870
	}
7871
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7872 7873 7874 7875 7876
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - doorbell timeout\n");
		return -ENODEV;
	}
7877 7878
	register_value = readl(&(h->cfgtable->TransportActive));
	if (!(register_value & CFGTBL_Trans_Performant)) {
7879 7880
		dev_err(&h->pdev->dev,
			"performant mode problem - transport not active\n");
7881
		return -ENODEV;
7882
	}
7883
	/* Change the access methods to the performant access methods */
7884 7885 7886
	h->access = access;
	h->transMethod = transMethod;

7887 7888
	if (!((trans_support & CFGTBL_Trans_io_accel1) ||
		(trans_support & CFGTBL_Trans_io_accel2)))
7889
		return 0;
7890

7891 7892 7893 7894 7895 7896 7897 7898 7899 7900
	if (trans_support & CFGTBL_Trans_io_accel1) {
		/* Set up I/O accelerator mode */
		for (i = 0; i < h->nreply_queues; i++) {
			writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
			h->reply_queue[i].current_entry =
				readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
		}
		bft[7] = h->ioaccel_maxsg + 8;
		calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
				h->ioaccel1_blockFetchTable);
7901

7902
		/* initialize all reply queue entries to unused */
7903 7904 7905 7906
		for (i = 0; i < h->nreply_queues; i++)
			memset(h->reply_queue[i].head,
				(u8) IOACCEL_MODE1_REPLY_UNUSED,
				h->reply_queue_size);
7907

7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918
		/* set all the constant fields in the accelerator command
		 * frames once at init time to save CPU cycles later.
		 */
		for (i = 0; i < h->nr_cmds; i++) {
			struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];

			cp->function = IOACCEL1_FUNCTION_SCSIIO;
			cp->err_info = (u32) (h->errinfo_pool_dhandle +
					(i * sizeof(struct ErrorInfo)));
			cp->err_info_len = sizeof(struct ErrorInfo);
			cp->sgl_offset = IOACCEL1_SGLOFFSET;
D
Don Brace 已提交
7919 7920
			cp->host_context_flags =
				cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
7921 7922
			cp->timeout_sec = 0;
			cp->ReplyQueue = 0;
7923
			cp->tag =
7924
				cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
7925 7926
			cp->host_addr =
				cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
7927 7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950
					(i * sizeof(struct io_accel1_cmd)));
		}
	} else if (trans_support & CFGTBL_Trans_io_accel2) {
		u64 cfg_offset, cfg_base_addr_index;
		u32 bft2_offset, cfg_base_addr;
		int rc;

		rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
			&cfg_base_addr_index, &cfg_offset);
		BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
		bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
		calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
				4, h->ioaccel2_blockFetchTable);
		bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
		BUILD_BUG_ON(offsetof(struct CfgTable,
				io_accel_request_size_offset) != 0xb8);
		h->ioaccel2_bft2_regs =
			remap_pci_mem(pci_resource_start(h->pdev,
					cfg_base_addr_index) +
					cfg_offset + bft2_offset,
					ARRAY_SIZE(bft2) *
					sizeof(*h->ioaccel2_bft2_regs));
		for (i = 0; i < ARRAY_SIZE(bft2); i++)
			writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
7951
	}
7952
	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7953 7954 7955 7956 7957 7958
	if (hpsa_wait_for_mode_change_ack(h)) {
		dev_err(&h->pdev->dev,
			"performant mode problem - enabling ioaccel mode\n");
		return -ENODEV;
	}
	return 0;
7959 7960
}

7961 7962 7963 7964 7965 7966 7967 7968 7969 7970 7971
/* Free ioaccel1 mode command blocks and block fetch table */
static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
{
	if (h->ioaccel_cmd_pool)
		pci_free_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
			h->ioaccel_cmd_pool,
			h->ioaccel_cmd_pool_dhandle);
	kfree(h->ioaccel1_blockFetchTable);
}

7972 7973
/* Allocate ioaccel1 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
7974
{
7975 7976 7977 7978 7979
	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;

7980 7981 7982 7983 7984 7985 7986 7987 7988 7989 7990 7991
	/* Command structures must be aligned on a 128-byte boundary
	 * because the 7 lower bits of the address are used by the
	 * hardware.
	 */
	BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
			IOACCEL1_COMMANDLIST_ALIGNMENT);
	h->ioaccel_cmd_pool =
		pci_alloc_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
			&(h->ioaccel_cmd_pool_dhandle));

	h->ioaccel1_blockFetchTable =
7992
		kmalloc(((h->ioaccel_maxsg + 1) *
7993 7994 7995 7996 7997 7998 7999 8000 8001 8002 8003
				sizeof(u32)), GFP_KERNEL);

	if ((h->ioaccel_cmd_pool == NULL) ||
		(h->ioaccel1_blockFetchTable == NULL))
		goto clean_up;

	memset(h->ioaccel_cmd_pool, 0,
		h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
	return 0;

clean_up:
8004
	hpsa_free_ioaccel1_cmd_and_bft(h);
8005
	return 1;
8006 8007
}

8008 8009 8010
/* Free ioaccel2 mode command blocks and block fetch table */
static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
{
8011 8012
	hpsa_free_ioaccel2_sg_chain_blocks(h);

8013 8014 8015 8016 8017 8018 8019 8020
	if (h->ioaccel2_cmd_pool)
		pci_free_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
			h->ioaccel2_cmd_pool,
			h->ioaccel2_cmd_pool_dhandle);
	kfree(h->ioaccel2_blockFetchTable);
}

8021 8022
/* Allocate ioaccel2 mode command blocks and block fetch table */
static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
8023
{
8024 8025
	int rc;

8026 8027 8028 8029 8030 8031 8032 8033 8034 8035 8036 8037 8038 8039 8040 8041 8042 8043 8044
	/* Allocate ioaccel2 mode command blocks and block fetch table */

	h->ioaccel_maxsg =
		readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
	if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
		h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;

	BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
			IOACCEL2_COMMANDLIST_ALIGNMENT);
	h->ioaccel2_cmd_pool =
		pci_alloc_consistent(h->pdev,
			h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
			&(h->ioaccel2_cmd_pool_dhandle));

	h->ioaccel2_blockFetchTable =
		kmalloc(((h->ioaccel_maxsg + 1) *
				sizeof(u32)), GFP_KERNEL);

	if ((h->ioaccel2_cmd_pool == NULL) ||
8045 8046 8047 8048 8049 8050 8051
		(h->ioaccel2_blockFetchTable == NULL)) {
		rc = -ENOMEM;
		goto clean_up;
	}

	rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
	if (rc)
8052 8053 8054 8055 8056 8057 8058
		goto clean_up;

	memset(h->ioaccel2_cmd_pool, 0,
		h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
	return 0;

clean_up:
8059
	hpsa_free_ioaccel2_cmd_and_bft(h);
8060
	return rc;
8061 8062
}

8063
static void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
8064 8065
{
	u32 trans_support;
8066 8067
	unsigned long transMethod = CFGTBL_Trans_Performant |
					CFGTBL_Trans_use_short_tags;
8068
	int i;
8069

8070 8071 8072
	if (hpsa_simple_mode)
		return;

8073 8074 8075 8076
	trans_support = readl(&(h->cfgtable->TransportSupport));
	if (!(trans_support & PERFORMANT_MODE))
		return;

8077 8078 8079 8080
	/* Check for I/O accelerator mode support */
	if (trans_support & CFGTBL_Trans_io_accel1) {
		transMethod |= CFGTBL_Trans_io_accel1 |
				CFGTBL_Trans_enable_directed_msix;
8081
		if (hpsa_alloc_ioaccel1_cmd_and_bft(h))
8082
			goto clean_up;
8083 8084 8085 8086
	} else {
		if (trans_support & CFGTBL_Trans_io_accel2) {
				transMethod |= CFGTBL_Trans_io_accel2 |
				CFGTBL_Trans_enable_directed_msix;
8087
		if (hpsa_alloc_ioaccel2_cmd_and_bft(h))
8088 8089
			goto clean_up;
		}
8090 8091
	}

8092
	h->nreply_queues = h->msix_vector > 0 ? h->msix_vector : 1;
8093
	hpsa_get_max_perf_mode_cmds(h);
8094
	/* Performant mode ring buffer and supporting data structures */
8095
	h->reply_queue_size = h->max_commands * sizeof(u64);
8096

8097
	for (i = 0; i < h->nreply_queues; i++) {
8098 8099 8100 8101 8102
		h->reply_queue[i].head = pci_alloc_consistent(h->pdev,
						h->reply_queue_size,
						&(h->reply_queue[i].busaddr));
		if (!h->reply_queue[i].head)
			goto clean_up;
8103 8104 8105 8106 8107
		h->reply_queue[i].size = h->max_commands;
		h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
		h->reply_queue[i].current_entry = 0;
	}

8108
	/* Need a block fetch table for performant mode */
8109
	h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
8110
				sizeof(u32)), GFP_KERNEL);
8111
	if (!h->blockFetchTable)
8112 8113
		goto clean_up;

8114
	hpsa_enter_performant_mode(h, trans_support);
8115 8116 8117
	return;

clean_up:
8118
	hpsa_free_reply_queues(h);
8119 8120 8121
	kfree(h->blockFetchTable);
}

8122
static int is_accelerated_cmd(struct CommandList *c)
8123
{
8124 8125 8126 8127 8128 8129
	return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
}

static void hpsa_drain_accel_commands(struct ctlr_info *h)
{
	struct CommandList *c = NULL;
8130
	int i, accel_cmds_out;
8131
	int refcount;
8132

8133
	do { /* wait for all outstanding ioaccel commands to drain out */
8134
		accel_cmds_out = 0;
8135 8136
		for (i = 0; i < h->nr_cmds; i++) {
			c = h->cmd_pool + i;
8137 8138 8139 8140
			refcount = atomic_inc_return(&c->refcount);
			if (refcount > 1) /* Command is allocated */
				accel_cmds_out += is_accelerated_cmd(c);
			cmd_free(h, c);
8141
		}
8142
		if (accel_cmds_out <= 0)
8143
			break;
8144 8145 8146 8147
		msleep(100);
	} while (1);
}

8148 8149 8150 8151 8152 8153
/*
 *  This is it.  Register the PCI driver information for the cards we control
 *  the OS will call our registered routines when it finds one of our cards.
 */
static int __init hpsa_init(void)
{
M
Mike Miller 已提交
8154
	return pci_register_driver(&hpsa_pci_driver);
8155 8156 8157 8158 8159 8160 8161
}

static void __exit hpsa_cleanup(void)
{
	pci_unregister_driver(&hpsa_pci_driver);
}

8162 8163
static void __attribute__((unused)) verify_offsets(void)
{
8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184 8185
#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)

	VERIFY_OFFSET(structure_size, 0);
	VERIFY_OFFSET(volume_blk_size, 4);
	VERIFY_OFFSET(volume_blk_cnt, 8);
	VERIFY_OFFSET(phys_blk_shift, 16);
	VERIFY_OFFSET(parity_rotation_shift, 17);
	VERIFY_OFFSET(strip_size, 18);
	VERIFY_OFFSET(disk_starting_blk, 20);
	VERIFY_OFFSET(disk_blk_cnt, 28);
	VERIFY_OFFSET(data_disks_per_row, 36);
	VERIFY_OFFSET(metadata_disks_per_row, 38);
	VERIFY_OFFSET(row_cnt, 40);
	VERIFY_OFFSET(layout_map_count, 42);
	VERIFY_OFFSET(flags, 44);
	VERIFY_OFFSET(dekindex, 46);
	/* VERIFY_OFFSET(reserved, 48 */
	VERIFY_OFFSET(data, 64);

#undef VERIFY_OFFSET

8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206 8207
#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)

	VERIFY_OFFSET(IU_type, 0);
	VERIFY_OFFSET(direction, 1);
	VERIFY_OFFSET(reply_queue, 2);
	/* VERIFY_OFFSET(reserved1, 3);  */
	VERIFY_OFFSET(scsi_nexus, 4);
	VERIFY_OFFSET(Tag, 8);
	VERIFY_OFFSET(cdb, 16);
	VERIFY_OFFSET(cciss_lun, 32);
	VERIFY_OFFSET(data_len, 40);
	VERIFY_OFFSET(cmd_priority_task_attr, 44);
	VERIFY_OFFSET(sg_count, 45);
	/* VERIFY_OFFSET(reserved3 */
	VERIFY_OFFSET(err_ptr, 48);
	VERIFY_OFFSET(err_len, 56);
	/* VERIFY_OFFSET(reserved4  */
	VERIFY_OFFSET(sg, 64);

#undef VERIFY_OFFSET

8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232
#define VERIFY_OFFSET(member, offset) \
	BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)

	VERIFY_OFFSET(dev_handle, 0x00);
	VERIFY_OFFSET(reserved1, 0x02);
	VERIFY_OFFSET(function, 0x03);
	VERIFY_OFFSET(reserved2, 0x04);
	VERIFY_OFFSET(err_info, 0x0C);
	VERIFY_OFFSET(reserved3, 0x10);
	VERIFY_OFFSET(err_info_len, 0x12);
	VERIFY_OFFSET(reserved4, 0x13);
	VERIFY_OFFSET(sgl_offset, 0x14);
	VERIFY_OFFSET(reserved5, 0x15);
	VERIFY_OFFSET(transfer_len, 0x1C);
	VERIFY_OFFSET(reserved6, 0x20);
	VERIFY_OFFSET(io_flags, 0x24);
	VERIFY_OFFSET(reserved7, 0x26);
	VERIFY_OFFSET(LUN, 0x34);
	VERIFY_OFFSET(control, 0x3C);
	VERIFY_OFFSET(CDB, 0x40);
	VERIFY_OFFSET(reserved8, 0x50);
	VERIFY_OFFSET(host_context_flags, 0x60);
	VERIFY_OFFSET(timeout_sec, 0x62);
	VERIFY_OFFSET(ReplyQueue, 0x64);
	VERIFY_OFFSET(reserved9, 0x65);
8233
	VERIFY_OFFSET(tag, 0x68);
8234 8235 8236 8237 8238 8239
	VERIFY_OFFSET(host_addr, 0x70);
	VERIFY_OFFSET(CISS_LUN, 0x78);
	VERIFY_OFFSET(SG, 0x78 + 8);
#undef VERIFY_OFFSET
}

8240 8241
module_init(hpsa_init);
module_exit(hpsa_cleanup);