aic79xx_osm.c 75.0 KB
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/*
 * Adaptec AIC79xx device driver for Linux.
 *
 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
 *
 * --------------------------------------------------------------------------
 * Copyright (c) 1994-2000 Justin T. Gibbs.
 * Copyright (c) 1997-1999 Doug Ledford
 * Copyright (c) 2000-2003 Adaptec Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include <scsi/scsicam.h>

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static struct scsi_transport_template *ahd_linux_transport_template = NULL;

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#include <linux/init.h>		/* __setup */
#include <linux/mm.h>		/* For fetching system memory size */
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#include <linux/blkdev.h>		/* For block_size() */
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#include <linux/delay.h>	/* For ssleep/msleep */
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#include <linux/device.h>
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/*
 * Bucket size for counting good commands in between bad ones.
 */
#define AHD_LINUX_ERR_THRESH	1000

/*
 * Set this to the delay in seconds after SCSI bus reset.
 * Note, we honor this only for the initial bus reset.
 * The scsi error recovery code performs its own bus settle
 * delay handling for error recovery actions.
 */
#ifdef CONFIG_AIC79XX_RESET_DELAY_MS
#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
#else
#define AIC79XX_RESET_DELAY 5000
#endif

/*
 * To change the default number of tagged transactions allowed per-device,
 * add a line to the lilo.conf file like:
 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
 * which will result in the first four devices on the first two
 * controllers being set to a tagged queue depth of 32.
 *
 * The tag_commands is an array of 16 to allow for wide and twin adapters.
 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
 * for channel 1.
 */
typedef struct {
	uint16_t tag_commands[16];	/* Allow for wide/twin adapters. */
} adapter_tag_info_t;

/*
 * Modify this as you see fit for your system.
 *
 * 0			tagged queuing disabled
 * 1 <= n <= 253	n == max tags ever dispatched.
 *
 * The driver will throttle the number of commands dispatched to a
 * device if it returns queue full.  For devices with a fixed maximum
 * queue depth, the driver will eventually determine this depth and
 * lock it in (a console message is printed to indicate that a lock
 * has occurred).  On some devices, queue full is returned for a temporary
 * resource shortage.  These devices will return queue full at varying
 * depths.  The driver will throttle back when the queue fulls occur and
 * attempt to slowly increase the depth over time as the device recovers
 * from the resource shortage.
 *
 * In this example, the first line will disable tagged queueing for all
 * the devices on the first probed aic79xx adapter.
 *
 * The second line enables tagged queueing with 4 commands/LUN for IDs
 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 * driver to attempt to use up to 64 tags for ID 1.
 *
 * The third line is the same as the first line.
 *
 * The fourth line disables tagged queueing for devices 0 and 3.  It
 * enables tagged queueing for the other IDs, with 16 commands/LUN
 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 * IDs 2, 5-7, and 9-15.
 */

/*
 * NOTE: The below structure is for reference only, the actual structure
 *       to modify in order to change things is just below this comment block.
adapter_tag_info_t aic79xx_tag_info[] =
{
	{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
	{{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
	{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
	{{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
};
*/

#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
#else
#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
#endif

#define AIC79XX_CONFIGED_TAG_COMMANDS {					\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,		\
	AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE		\
}

/*
 * By default, use the number of commands specified by
 * the users kernel configuration.
 */
static adapter_tag_info_t aic79xx_tag_info[] =
{
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS},
	{AIC79XX_CONFIGED_TAG_COMMANDS}
};

/*
 * The I/O cell on the chip is very configurable in respect to its analog
 * characteristics.  Set the defaults here; they can be overriden with
 * the proper insmod parameters.
 */
struct ahd_linux_iocell_opts
{
	uint8_t	precomp;
	uint8_t	slewrate;
	uint8_t amplitude;
};
#define AIC79XX_DEFAULT_PRECOMP		0xFF
#define AIC79XX_DEFAULT_SLEWRATE	0xFF
#define AIC79XX_DEFAULT_AMPLITUDE	0xFF
#define AIC79XX_DEFAULT_IOOPTS			\
{						\
	AIC79XX_DEFAULT_PRECOMP,		\
	AIC79XX_DEFAULT_SLEWRATE,		\
	AIC79XX_DEFAULT_AMPLITUDE		\
}
#define AIC79XX_PRECOMP_INDEX	0
#define AIC79XX_SLEWRATE_INDEX	1
#define AIC79XX_AMPLITUDE_INDEX	2
static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
{
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS,
	AIC79XX_DEFAULT_IOOPTS
};

/*
 * There should be a specific return value for this in scsi.h, but
 * it seems that most drivers ignore it.
 */
#define DID_UNDERFLOW   DID_ERROR

void
ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
{
	printk("(scsi%d:%c:%d:%d): ",
	       ahd->platform_data->host->host_no,
	       scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
	       scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
	       scb != NULL ? SCB_GET_LUN(scb) : -1);
}

/*
 * XXX - these options apply unilaterally to _all_ adapters
 *       cards in the system.  This should be fixed.  Exceptions to this
 *       rule are noted in the comments.
 */

/*
 * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 * has no effect on any later resets that might occur due to things like
 * SCSI bus timeouts.
 */
static uint32_t aic79xx_no_reset;

/*
 * Should we force EXTENDED translation on a controller.
 *     0 == Use whatever is in the SEEPROM or default to off
 *     1 == Use whatever is in the SEEPROM or default to on
 */
static uint32_t aic79xx_extended;

/*
 * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 * dubious at best.  To my knowledge, this option has never actually
 * solved a PCI parity problem, but on certain machines with broken PCI
 * chipset configurations, it can generate tons of false error messages.
 * It's included in the driver for completeness.
 *   0	   = Shut off PCI parity check
 *   non-0 = Enable PCI parity check
 *
 * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 * variable to -1 you would actually want to simply pass the variable
 * name without a number.  That will invert the 0 which will result in
 * -1.
 */
static uint32_t aic79xx_pci_parity = ~0;

/*
 * There are lots of broken chipsets in the world.  Some of them will
 * violate the PCI spec when we issue byte sized memory writes to our
 * controller.  I/O mapped register access, if allowed by the given
 * platform, will work in almost all cases.
 */
uint32_t aic79xx_allow_memio = ~0;

/*
 * So that we can set how long each device is given as a selection timeout.
 * The table of values goes like this:
 *   0 - 256ms
 *   1 - 128ms
 *   2 - 64ms
 *   3 - 32ms
 * We default to 256ms because some older devices need a longer time
 * to respond to initial selection.
 */
static uint32_t aic79xx_seltime;

/*
 * Certain devices do not perform any aging on commands.  Should the
 * device be saturated by commands in one portion of the disk, it is
 * possible for transactions on far away sectors to never be serviced.
 * To handle these devices, we can periodically send an ordered tag to
 * force all outstanding transactions to be serviced prior to a new
 * transaction.
 */
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static uint32_t aic79xx_periodic_otag;
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/* Some storage boxes are using an LSI chip which has a bug making it
 * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 * storage boxes have been reported to be buggy:
 * EonStor 3U 16-Bay: U16U-G3A3
 * EonStor 2U 12-Bay: U12U-G3A3
 * SentinelRAID: 2500F R5 / R6
 * SentinelRAID: 2500F R1
 * SentinelRAID: 2500F/1500F
 * SentinelRAID: 150F
 * 
 * To get around this LSI bug, you can set your board to 160 mode
 * or you can enable the SLOWCRC bit.
 */
uint32_t aic79xx_slowcrc;

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/*
 * Module information and settable options.
 */
static char *aic79xx = NULL;

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MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
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MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(AIC79XX_DRIVER_VERSION);
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module_param(aic79xx, charp, 0444);
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MODULE_PARM_DESC(aic79xx,
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"period-delimited options string:\n"
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"	verbose			Enable verbose/diagnostic logging\n"
"	allow_memio		Allow device registers to be memory mapped\n"
"	debug			Bitmask of debug values to enable\n"
"	no_reset		Supress initial bus resets\n"
"	extended		Enable extended geometry on all controllers\n"
"	periodic_otag		Send an ordered tagged transaction\n"
"				periodically to prevent tag starvation.\n"
"				This may be required by some older disk\n"
"				or drives/RAID arrays.\n"
"	tag_info:<tag_str>	Set per-target tag depth\n"
"	global_tag_depth:<int>	Global tag depth for all targets on all buses\n"
"	slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
"	precomp:<pcomp_list>	Set the signal precompensation (0-7).\n"
"	amplitude:<int>		Set the signal amplitude (0-7).\n"
"	seltime:<int>		Selection Timeout:\n"
"				(0/256ms,1/128ms,2/64ms,3/32ms)\n"
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"	slowcrc			Turn on the SLOWCRC bit (Rev B only)\n"		 
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"\n"
"	Sample /etc/modprobe.conf line:\n"
"		Enable verbose logging\n"
"		Set tag depth on Controller 2/Target 2 to 10 tags\n"
"		Shorten the selection timeout to 128ms\n"
"\n"
"	options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
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);
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static void ahd_linux_handle_scsi_status(struct ahd_softc *,
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					 struct scsi_device *,
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					 struct scb *);
static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
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					 struct scsi_cmnd *cmd);
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static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
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static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
				     struct ahd_devinfo *devinfo);
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static void ahd_linux_device_queue_depth(struct scsi_device *);
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static int ahd_linux_run_command(struct ahd_softc*,
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				 struct ahd_linux_device *,
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				 struct scsi_cmnd *);
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static void ahd_linux_setup_tag_info_global(char *p);
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static int  aic79xx_setup(char *c);
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static void ahd_freeze_simq(struct ahd_softc *ahd);
static void ahd_release_simq(struct ahd_softc *ahd);
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static int ahd_linux_unit;

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/****************************** Inlines ***************************************/
static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);

static __inline void
ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
{
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	struct scsi_cmnd *cmd;
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	cmd = scb->io_ctx;
	ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
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	scsi_dma_unmap(cmd);
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}

/******************************** Macros **************************************/
#define BUILD_SCSIID(ahd, cmd)						\
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	(((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
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/*
 * Return a string describing the driver.
 */
static const char *
ahd_linux_info(struct Scsi_Host *host)
{
	static char buffer[512];
	char	ahd_info[256];
	char   *bp;
	struct ahd_softc *ahd;

	bp = &buffer[0];
	ahd = *(struct ahd_softc **)host->hostdata;
	memset(bp, 0, sizeof(buffer));
	strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
	strcat(bp, AIC79XX_DRIVER_VERSION);
	strcat(bp, "\n");
	strcat(bp, "        <");
	strcat(bp, ahd->description);
	strcat(bp, ">\n");
	strcat(bp, "        ");
	ahd_controller_info(ahd, ahd_info);
	strcat(bp, ahd_info);

	return (bp);
}

/*
 * Queue an SCB to the controller.
 */
static int
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ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
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{
	struct	 ahd_softc *ahd;
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	struct	 ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
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	int rtn = SCSI_MLQUEUE_HOST_BUSY;
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	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;

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	cmd->scsi_done = scsi_done;
	cmd->result = CAM_REQ_INPROG << 16;
	rtn = ahd_linux_run_command(ahd, dev, cmd);
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	return rtn;
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}

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static inline struct scsi_target **
ahd_linux_target_in_softc(struct scsi_target *starget)
{
	struct	ahd_softc *ahd =
		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
	unsigned int target_offset;

	target_offset = starget->id;
	if (starget->channel != 0)
		target_offset += 8;

	return &ahd->platform_data->starget[target_offset];
}

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static int
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ahd_linux_target_alloc(struct scsi_target *starget)
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{
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	struct	ahd_softc *ahd =
		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
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	struct seeprom_config *sc = ahd->seep_config;
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	unsigned long flags;
	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
	struct ahd_devinfo devinfo;
	struct ahd_initiator_tinfo *tinfo;
	struct ahd_tmode_tstate *tstate;
	char channel = starget->channel + 'A';
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	ahd_lock(ahd, &flags);

	BUG_ON(*ahd_targp != NULL);

	*ahd_targp = starget;

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	if (sc) {
		int flags = sc->device_flags[starget->id];

		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
					    starget->id, &tstate);

		if ((flags  & CFPACKETIZED) == 0) {
			/* Do not negotiate packetized transfers */
			spi_rd_strm(starget) = 0;
			spi_pcomp_en(starget) = 0;
			spi_rti(starget) = 0;
			spi_wr_flow(starget) = 0;
			spi_hold_mcs(starget) = 0;
		} else {
			if ((ahd->features & AHD_RTI) == 0)
				spi_rti(starget) = 0;
		}

		if ((flags & CFQAS) == 0)
			spi_qas(starget) = 0;

		/* Transinfo values have been set to BIOS settings */
		spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
		spi_min_period(starget) = tinfo->user.period;
		spi_max_offset(starget) = tinfo->user.offset;
	}

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	tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
				    starget->id, &tstate);
	ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
			    CAM_LUN_WILDCARD, channel,
			    ROLE_INITIATOR);
	ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
			 AHD_TRANS_GOAL, /*paused*/FALSE);
	ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
		      AHD_TRANS_GOAL, /*paused*/FALSE);
	ahd_unlock(ahd, &flags);

	return 0;
}

static void
ahd_linux_target_destroy(struct scsi_target *starget)
{
	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);

	*ahd_targp = NULL;
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}

static int
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ahd_linux_slave_alloc(struct scsi_device *sdev)
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{
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	struct	ahd_softc *ahd =
		*((struct ahd_softc **)sdev->host->hostdata);
	struct ahd_linux_device *dev;
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	if (bootverbose)
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		printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);

	dev = scsi_transport_device_data(sdev);
	memset(dev, 0, sizeof(*dev));

	/*
	 * We start out life using untagged
	 * transactions of which we allow one.
	 */
	dev->openings = 1;

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	/*
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	 * Set maxtags to 0.  This will be changed if we
	 * later determine that we are dealing with
	 * a tagged queuing capable device.
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	 */
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	dev->maxtags = 0;
	
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	return (0);
}

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static int
ahd_linux_slave_configure(struct scsi_device *sdev)
{
	struct	ahd_softc *ahd;

	ahd = *((struct ahd_softc **)sdev->host->hostdata);
	if (bootverbose)
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		sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
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	ahd_linux_device_queue_depth(sdev);

	/* Initial Domain Validation */
	if (!spi_initial_dv(sdev->sdev_target))
		spi_dv_device(sdev);

	return 0;
}

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#if defined(__i386__)
/*
 * Return the disk geometry for the given SCSI device.
 */
static int
ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
		    sector_t capacity, int geom[])
{
	uint8_t *bh;
	int	 heads;
	int	 sectors;
	int	 cylinders;
	int	 ret;
	int	 extended;
	struct	 ahd_softc *ahd;

	ahd = *((struct ahd_softc **)sdev->host->hostdata);

	bh = scsi_bios_ptable(bdev);
	if (bh) {
		ret = scsi_partsize(bh, capacity,
				    &geom[2], &geom[0], &geom[1]);
		kfree(bh);
		if (ret != -1)
			return (ret);
	}
	heads = 64;
	sectors = 32;
	cylinders = aic_sector_div(capacity, heads, sectors);

	if (aic79xx_extended != 0)
		extended = 1;
	else
		extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
	if (extended && cylinders >= 1024) {
		heads = 255;
		sectors = 63;
		cylinders = aic_sector_div(capacity, heads, sectors);
	}
	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;
	return (0);
}
#endif

/*
 * Abort the current SCSI command(s).
 */
static int
614 615 616
ahd_linux_abort(struct scsi_cmnd *cmd)
{
	int error;
617 618
	
	error = ahd_linux_queue_abort_cmd(cmd);
619 620 621 622 623 624 625 626 627 628

	return error;
}

/*
 * Attempt to send a target reset message to the device that timed out.
 */
static int
ahd_linux_dev_reset(struct scsi_cmnd *cmd)
{
629 630 631 632 633 634 635 636 637 638
	struct ahd_softc *ahd;
	struct ahd_linux_device *dev;
	struct scb *reset_scb;
	u_int  cdb_byte;
	int    retval = SUCCESS;
	int    paused;
	int    wait;
	struct	ahd_initiator_tinfo *tinfo;
	struct	ahd_tmode_tstate *tstate;
	unsigned long flags;
639
	DECLARE_COMPLETION_ONSTACK(done);
640

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	reset_scb = NULL;
	paused = FALSE;
	wait = FALSE;
	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;

	scmd_printk(KERN_INFO, cmd,
		    "Attempting to queue a TARGET RESET message:");

	printf("CDB:");
	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
		printf(" 0x%x", cmd->cmnd[cdb_byte]);
	printf("\n");

	/*
	 * Determine if we currently own this command.
	 */
	dev = scsi_transport_device_data(cmd->device);

	if (dev == NULL) {
		/*
		 * No target device for this command exists,
		 * so we must not still own the command.
		 */
		scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
		return SUCCESS;
	}

	/*
	 * Generate us a new SCB
	 */
	reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
	if (!reset_scb) {
		scmd_printk(KERN_INFO, cmd, "No SCB available\n");
		return FAILED;
	}

	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
				    cmd->device->id, &tstate);
	reset_scb->io_ctx = cmd;
	reset_scb->platform_data->dev = dev;
	reset_scb->sg_count = 0;
	ahd_set_residual(reset_scb, 0);
	ahd_set_sense_residual(reset_scb, 0);
	reset_scb->platform_data->xfer_len = 0;
	reset_scb->hscb->control = 0;
	reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
	reset_scb->hscb->lun = cmd->device->lun;
	reset_scb->hscb->cdb_len = 0;
	reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
	reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
		reset_scb->flags |= SCB_PACKETIZED;
	} else {
		reset_scb->hscb->control |= MK_MESSAGE;
	}
	dev->openings--;
	dev->active++;
	dev->commands_issued++;

	ahd_lock(ahd, &flags);

	LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
	ahd_queue_scb(ahd, reset_scb);

	ahd->platform_data->eh_done = &done;
	ahd_unlock(ahd, &flags);

	printf("%s: Device reset code sleeping\n", ahd_name(ahd));
	if (!wait_for_completion_timeout(&done, 5 * HZ)) {
		ahd_lock(ahd, &flags);
		ahd->platform_data->eh_done = NULL;
		ahd_unlock(ahd, &flags);
		printf("%s: Device reset timer expired (active %d)\n",
		       ahd_name(ahd), dev->active);
		retval = FAILED;
	}
	printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);

	return (retval);
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}

/*
 * Reset the SCSI bus.
 */
static int
ahd_linux_bus_reset(struct scsi_cmnd *cmd)
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{
	struct ahd_softc *ahd;
729
	int    found;
730
	unsigned long flags;
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	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
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#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
		printf("%s: Bus reset called for cmd %p\n",
		       ahd_name(ahd), cmd);
#endif
738 739
	ahd_lock(ahd, &flags);

740
	found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
741
				  /*initiate reset*/TRUE);
742
	ahd_unlock(ahd, &flags);
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	if (bootverbose)
		printf("%s: SCSI bus reset delivered. "
		       "%d SCBs aborted.\n", ahd_name(ahd), found);
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748 749
	return (SUCCESS);
}
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struct scsi_host_template aic79xx_driver_template = {
	.module			= THIS_MODULE,
	.name			= "aic79xx",
754
	.proc_name		= "aic79xx",
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	.proc_info		= ahd_linux_proc_info,
	.info			= ahd_linux_info,
	.queuecommand		= ahd_linux_queue,
	.eh_abort_handler	= ahd_linux_abort,
	.eh_device_reset_handler = ahd_linux_dev_reset,
	.eh_bus_reset_handler	= ahd_linux_bus_reset,
#if defined(__i386__)
	.bios_param		= ahd_linux_biosparam,
#endif
	.can_queue		= AHD_MAX_QUEUE,
	.this_id		= -1,
766
	.max_sectors		= 8192,
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	.cmd_per_lun		= 2,
	.use_clustering		= ENABLE_CLUSTERING,
769
	.use_sg_chaining	= ENABLE_SG_CHAINING,
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	.slave_alloc		= ahd_linux_slave_alloc,
	.slave_configure	= ahd_linux_slave_configure,
	.target_alloc		= ahd_linux_target_alloc,
	.target_destroy		= ahd_linux_target_destroy,
};
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/******************************** Bus DMA *************************************/
int
ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
		   bus_size_t alignment, bus_size_t boundary,
		   dma_addr_t lowaddr, dma_addr_t highaddr,
		   bus_dma_filter_t *filter, void *filterarg,
		   bus_size_t maxsize, int nsegments,
		   bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
{
	bus_dma_tag_t dmat;

	dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
	if (dmat == NULL)
		return (ENOMEM);
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	/*
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	 * Linux is very simplistic about DMA memory.  For now don't
	 * maintain all specification information.  Once Linux supplies
	 * better facilities for doing these operations, or the
	 * needs of this particular driver change, we might need to do
	 * more here.
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	 */
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	dmat->alignment = alignment;
	dmat->boundary = boundary;
	dmat->maxsize = maxsize;
	*ret_tag = dmat;
	return (0);
}
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void
ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
{
	free(dmat, M_DEVBUF);
}
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int
ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
		 int flags, bus_dmamap_t *mapp)
{
	*vaddr = pci_alloc_consistent(ahd->dev_softc,
				      dmat->maxsize, mapp);
	if (*vaddr == NULL)
		return (ENOMEM);
	return(0);
}
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void
ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
		void* vaddr, bus_dmamap_t map)
{
	pci_free_consistent(ahd->dev_softc, dmat->maxsize,
			    vaddr, map);
}

int
ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
		void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
		void *cb_arg, int flags)
{
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	/*
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	 * Assume for now that this will only be used during
	 * initialization and not for per-transaction buffer mapping.
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	 */
839
	bus_dma_segment_t stack_sg;
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	stack_sg.ds_addr = map;
	stack_sg.ds_len = dmat->maxsize;
	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
	return (0);
}
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void
ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
{
}
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int
ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
{
	/* Nothing to do */
	return (0);
}
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/********************* Platform Dependent Functions ***************************/
static void
ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
{
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	if ((instance >= 0)
865
	 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
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		uint8_t *iocell_info;

		iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
		iocell_info[index] = value & 0xFFFF;
		if (bootverbose)
			printf("iocell[%d:%ld] = %d\n", instance, index, value);
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	}
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}
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static void
ahd_linux_setup_tag_info_global(char *p)
{
	int tags, i, j;
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	tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
	printf("Setting Global Tags= %d\n", tags);

883
	for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
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		for (j = 0; j < AHD_NUM_TARGETS; j++) {
			aic79xx_tag_info[i].tag_commands[j] = tags;
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		}
	}
}

static void
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ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
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{

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	if ((instance >= 0) && (targ >= 0)
895
	 && (instance < ARRAY_SIZE(aic79xx_tag_info))
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	 && (targ < AHD_NUM_TARGETS)) {
		aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
		if (bootverbose)
			printf("tag_info[%d:%d] = %d\n", instance, targ, value);
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	}
}

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static char *
ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
		       void (*callback)(u_long, int, int, int32_t),
		       u_long callback_arg)
{
	char	*tok_end;
	char	*tok_end2;
	int      i;
	int      instance;
	int	 targ;
	int	 done;
	char	 tok_list[] = {'.', ',', '{', '}', '\0'};

	/* All options use a ':' name/arg separator */
	if (*opt_arg != ':')
		return (opt_arg);
	opt_arg++;
	instance = -1;
	targ = -1;
	done = FALSE;
	/*
	 * Restore separator that may be in
	 * the middle of our option argument.
	 */
	tok_end = strchr(opt_arg, '\0');
	if (tok_end < end)
		*tok_end = ',';
	while (!done) {
		switch (*opt_arg) {
		case '{':
			if (instance == -1) {
				instance = 0;
			} else {
				if (depth > 1) {
					if (targ == -1)
						targ = 0;
				} else {
					printf("Malformed Option %s\n",
					       opt_name);
					done = TRUE;
				}
			}
			opt_arg++;
			break;
		case '}':
			if (targ != -1)
				targ = -1;
			else if (instance != -1)
				instance = -1;
			opt_arg++;
			break;
		case ',':
		case '.':
			if (instance == -1)
				done = TRUE;
			else if (targ >= 0)
				targ++;
			else if (instance >= 0)
				instance++;
			opt_arg++;
			break;
		case '\0':
			done = TRUE;
			break;
		default:
			tok_end = end;
			for (i = 0; tok_list[i]; i++) {
				tok_end2 = strchr(opt_arg, tok_list[i]);
				if ((tok_end2) && (tok_end2 < tok_end))
					tok_end = tok_end2;
			}
			callback(callback_arg, instance, targ,
				 simple_strtol(opt_arg, NULL, 0));
			opt_arg = tok_end;
			break;
		}
	}
	return (opt_arg);
}

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/*
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 * Handle Linux boot parameters. This routine allows for assigning a value
 * to a parameter with a ':' between the parameter and the value.
 * ie. aic79xx=stpwlev:1,extended
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 */
static int
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aic79xx_setup(char *s)
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{
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	int	i, n;
	char   *p;
	char   *end;
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	static struct {
		const char *name;
		uint32_t *flag;
	} options[] = {
		{ "extended", &aic79xx_extended },
		{ "no_reset", &aic79xx_no_reset },
		{ "verbose", &aic79xx_verbose },
		{ "allow_memio", &aic79xx_allow_memio},
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#ifdef AHD_DEBUG
1004
		{ "debug", &ahd_debug },
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#endif
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		{ "periodic_otag", &aic79xx_periodic_otag },
		{ "pci_parity", &aic79xx_pci_parity },
		{ "seltime", &aic79xx_seltime },
		{ "tag_info", NULL },
		{ "global_tag_depth", NULL},
		{ "slewrate", NULL },
		{ "precomp", NULL },
		{ "amplitude", NULL },
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		{ "slowcrc", &aic79xx_slowcrc },
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	};
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	end = strchr(s, '\0');
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	/*
1020
	 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1021
	 * will never be 0 in this case.
1022 1023
	 */
	n = 0;
1024 1025 1026 1027

	while ((p = strsep(&s, ",.")) != NULL) {
		if (*p == '\0')
			continue;
1028
		for (i = 0; i < ARRAY_SIZE(options); i++) {
1029 1030 1031 1032 1033

			n = strlen(options[i].name);
			if (strncmp(options[i].name, p, n) == 0)
				break;
		}
1034
		if (i == ARRAY_SIZE(options))
1035 1036 1037 1038 1039
			continue;

		if (strncmp(p, "global_tag_depth", n) == 0) {
			ahd_linux_setup_tag_info_global(p + n);
		} else if (strncmp(p, "tag_info", n) == 0) {
1040
			s = ahd_parse_brace_option("tag_info", p + n, end,
1041 1042
			    2, ahd_linux_setup_tag_info, 0);
		} else if (strncmp(p, "slewrate", n) == 0) {
1043
			s = ahd_parse_brace_option("slewrate",
1044 1045 1046
			    p + n, end, 1, ahd_linux_setup_iocell_info,
			    AIC79XX_SLEWRATE_INDEX);
		} else if (strncmp(p, "precomp", n) == 0) {
1047
			s = ahd_parse_brace_option("precomp",
1048 1049 1050
			    p + n, end, 1, ahd_linux_setup_iocell_info,
			    AIC79XX_PRECOMP_INDEX);
		} else if (strncmp(p, "amplitude", n) == 0) {
1051
			s = ahd_parse_brace_option("amplitude",
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
			    p + n, end, 1, ahd_linux_setup_iocell_info,
			    AIC79XX_AMPLITUDE_INDEX);
		} else if (p[n] == ':') {
			*(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
		} else if (!strncmp(p, "verbose", n)) {
			*(options[i].flag) = 1;
		} else {
			*(options[i].flag) ^= 0xFFFFFFFF;
		}
	}
	return 1;
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}

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__setup("aic79xx=", aic79xx_setup);

uint32_t aic79xx_verbose;
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int
1070
ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
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{
1072 1073 1074 1075
	char	buf[80];
	struct	Scsi_Host *host;
	char	*new_name;
	u_long	s;
1076
	int	retval;
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	template->name = ahd->description;
	host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
	if (host == NULL)
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		return (ENOMEM);

1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093
	*((struct ahd_softc **)host->hostdata) = ahd;
	ahd->platform_data->host = host;
	host->can_queue = AHD_MAX_QUEUE;
	host->cmd_per_lun = 2;
	host->sg_tablesize = AHD_NSEG;
	host->this_id = ahd->our_id;
	host->irq = ahd->platform_data->irq;
	host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
	host->max_lun = AHD_NUM_LUNS;
	host->max_channel = 0;
	host->sg_tablesize = AHD_NSEG;
1094
	ahd_lock(ahd, &s);
1095
	ahd_set_unit(ahd, ahd_linux_unit++);
1096
	ahd_unlock(ahd, &s);
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
	sprintf(buf, "scsi%d", host->host_no);
	new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	if (new_name != NULL) {
		strcpy(new_name, buf);
		ahd_set_name(ahd, new_name);
	}
	host->unique_id = ahd->unit;
	ahd_linux_initialize_scsi_bus(ahd);
	ahd_intr_enable(ahd, TRUE);

	host->transportt = ahd_linux_transport_template;

1109 1110 1111 1112 1113 1114 1115
	retval = scsi_add_host(host, &ahd->dev_softc->dev);
	if (retval) {
		printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
		scsi_host_put(host);
		return retval;
	}

1116
	scsi_scan_host(host);
1117
	return 0;
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}

1120 1121 1122 1123 1124 1125 1126
/*
 * Place the SCSI bus into a known state by either resetting it,
 * or forcing transfer negotiations on the next command to any
 * target.
 */
static void
ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
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{
1128 1129
	u_int target_id;
	u_int numtarg;
1130
	unsigned long s;
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1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
	target_id = 0;
	numtarg = 0;

	if (aic79xx_no_reset != 0)
		ahd->flags &= ~AHD_RESET_BUS_A;

	if ((ahd->flags & AHD_RESET_BUS_A) != 0)
		ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
	else
		numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
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1143 1144
	ahd_lock(ahd, &s);

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	/*
1146 1147
	 * Force negotiation to async for all targets that
	 * will not see an initial bus reset.
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	 */
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
	for (; target_id < numtarg; target_id++) {
		struct ahd_devinfo devinfo;
		struct ahd_initiator_tinfo *tinfo;
		struct ahd_tmode_tstate *tstate;

		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
					    target_id, &tstate);
		ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
				    CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
		ahd_update_neg_request(ahd, &devinfo, tstate,
				       tinfo, AHD_NEG_ALWAYS);
	}
1161
	ahd_unlock(ahd, &s);
1162 1163 1164
	/* Give the bus some time to recover */
	if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
		ahd_freeze_simq(ahd);
1165 1166
		msleep(AIC79XX_RESET_DELAY);
		ahd_release_simq(ahd);
1167
	}
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}

int
1171
ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
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{
1173 1174 1175 1176 1177 1178 1179 1180
	ahd->platform_data =
	    malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
	if (ahd->platform_data == NULL)
		return (ENOMEM);
	memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
	ahd->platform_data->irq = AHD_LINUX_NOIRQ;
	ahd_lockinit(ahd);
	ahd->seltime = (aic79xx_seltime & 0x3) << 4;
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	return (0);
}

1184 1185
void
ahd_platform_free(struct ahd_softc *ahd)
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{
1187
	struct scsi_target *starget;
1188
	int i;
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1190 1191 1192 1193 1194 1195 1196 1197
	if (ahd->platform_data != NULL) {
		/* destroy all of the device and target objects */
		for (i = 0; i < AHD_NUM_TARGETS; i++) {
			starget = ahd->platform_data->starget[i];
			if (starget != NULL) {
				ahd->platform_data->starget[i] = NULL;
			}
		}
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1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212
		if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
			free_irq(ahd->platform_data->irq, ahd);
		if (ahd->tags[0] == BUS_SPACE_PIO
		 && ahd->bshs[0].ioport != 0)
			release_region(ahd->bshs[0].ioport, 256);
		if (ahd->tags[1] == BUS_SPACE_PIO
		 && ahd->bshs[1].ioport != 0)
			release_region(ahd->bshs[1].ioport, 256);
		if (ahd->tags[0] == BUS_SPACE_MEMIO
		 && ahd->bshs[0].maddr != NULL) {
			iounmap(ahd->bshs[0].maddr);
			release_mem_region(ahd->platform_data->mem_busaddr,
					   0x1000);
		}
1213 1214 1215
		if (ahd->platform_data->host)
			scsi_host_put(ahd->platform_data->host);

1216 1217
		free(ahd->platform_data, M_DEVBUF);
	}
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}

1220 1221
void
ahd_platform_init(struct ahd_softc *ahd)
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{
1223 1224 1225
	/*
	 * Lookup and commit any modified IO Cell options.
	 */
1226
	if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1227
		struct ahd_linux_iocell_opts *iocell_opts;
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1229 1230 1231 1232 1233 1234 1235
		iocell_opts = &aic79xx_iocell_info[ahd->unit];
		if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
			AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
		if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
			AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
		if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
			AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
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	}

}

1240 1241
void
ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
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{
1243 1244 1245 1246
	ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
				SCB_GET_CHANNEL(ahd, scb),
				SCB_GET_LUN(scb), SCB_LIST_NULL,
				ROLE_UNKNOWN, CAM_REQUEUE_REQ);
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}

1249
void
1250 1251
ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
		      struct ahd_devinfo *devinfo, ahd_queue_alg alg)
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{
1253 1254 1255
	struct ahd_linux_device *dev;
	int was_queuing;
	int now_queuing;
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1257 1258
	if (sdev == NULL)
		return;
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1260
	dev = scsi_transport_device_data(sdev);
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1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
	if (dev == NULL)
		return;
	was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
	switch (alg) {
	default:
	case AHD_QUEUE_NONE:
		now_queuing = 0;
		break; 
	case AHD_QUEUE_BASIC:
		now_queuing = AHD_DEV_Q_BASIC;
		break;
	case AHD_QUEUE_TAGGED:
		now_queuing = AHD_DEV_Q_TAGGED;
		break;
	}
	if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
	 && (was_queuing != now_queuing)
	 && (dev->active != 0)) {
		dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
		dev->qfrozen++;
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	}

1284 1285 1286
	dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
	if (now_queuing) {
		u_int usertags;
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1288 1289 1290 1291 1292 1293 1294 1295 1296
		usertags = ahd_linux_user_tagdepth(ahd, devinfo);
		if (!was_queuing) {
			/*
			 * Start out agressively and allow our
			 * dynamic queue depth algorithm to take
			 * care of the rest.
			 */
			dev->maxtags = usertags;
			dev->openings = dev->maxtags - dev->active;
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		}
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
		if (dev->maxtags == 0) {
			/*
			 * Queueing is disabled by the user.
			 */
			dev->openings = 1;
		} else if (alg == AHD_QUEUE_TAGGED) {
			dev->flags |= AHD_DEV_Q_TAGGED;
			if (aic79xx_periodic_otag != 0)
				dev->flags |= AHD_DEV_PERIODIC_OTAG;
		} else
			dev->flags |= AHD_DEV_Q_BASIC;
	} else {
		/* We can only have one opening. */
		dev->maxtags = 0;
		dev->openings =  1 - dev->active;
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	}

1315 1316
	switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
	case AHD_DEV_Q_BASIC:
1317 1318
		scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
		scsi_activate_tcq(sdev, dev->openings + dev->active);
1319 1320
		break;
	case AHD_DEV_Q_TAGGED:
1321 1322
		scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
		scsi_activate_tcq(sdev, dev->openings + dev->active);
1323 1324
		break;
	default:
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		/*
1326 1327 1328 1329
		 * We allow the OS to queue 2 untagged transactions to
		 * us at any time even though we can only execute them
		 * serially on the controller/device.  This should
		 * remove some latency.
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		 */
1331
		scsi_deactivate_tcq(sdev, 1);
1332
		break;
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	}
}

1336 1337 1338
int
ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
			int lun, u_int tag, role_t role, uint32_t status)
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{
1340
	return 0;
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}

1343 1344
static u_int
ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
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{
1346 1347
	static int warned_user;
	u_int tags;
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1349 1350
	tags = 0;
	if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1351
		if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368

			if (warned_user == 0) {
				printf(KERN_WARNING
"aic79xx: WARNING: Insufficient tag_info instances\n"
"aic79xx: for installed controllers.  Using defaults\n"
"aic79xx: Please update the aic79xx_tag_info array in\n"
"aic79xx: the aic79xx_osm.c source file.\n");
				warned_user++;
			}
			tags = AHD_MAX_QUEUE;
		} else {
			adapter_tag_info_t *tag_info;

			tag_info = &aic79xx_tag_info[ahd->unit];
			tags = tag_info->tag_commands[devinfo->target_offset];
			if (tags > AHD_MAX_QUEUE)
				tags = AHD_MAX_QUEUE;
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		}
	}
1371
	return (tags);
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}

/*
1375
 * Determines the queue depth for a given device.
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 */
static void
1378
ahd_linux_device_queue_depth(struct scsi_device *sdev)
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{
1380 1381 1382
	struct	ahd_devinfo devinfo;
	u_int	tags;
	struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
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1384 1385 1386 1387 1388 1389 1390
	ahd_compile_devinfo(&devinfo,
			    ahd->our_id,
			    sdev->sdev_target->id, sdev->lun,
			    sdev->sdev_target->channel == 0 ? 'A' : 'B',
			    ROLE_INITIATOR);
	tags = ahd_linux_user_tagdepth(ahd, &devinfo);
	if (tags != 0 && sdev->tagged_supported != 0) {
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1392 1393 1394
		ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
		ahd_send_async(ahd, devinfo.channel, devinfo.target,
			       devinfo.lun, AC_TRANSFER_NEG);
1395 1396 1397
		ahd_print_devinfo(ahd, &devinfo);
		printf("Tagged Queuing enabled.  Depth %d\n", tags);
	} else {
1398 1399 1400
		ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
		ahd_send_async(ahd, devinfo.channel, devinfo.target,
			       devinfo.lun, AC_TRANSFER_NEG);
1401 1402
	}
}
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1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
static int
ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
		      struct scsi_cmnd *cmd)
{
	struct	 scb *scb;
	struct	 hardware_scb *hscb;
	struct	 ahd_initiator_tinfo *tinfo;
	struct	 ahd_tmode_tstate *tstate;
	u_int	 col_idx;
	uint16_t mask;
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	unsigned long flags;
1415
	int nseg;
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	ahd_lock(ahd, &flags);
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	/*
1420
	 * Get an scb to use.
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	 */
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432
	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
				    cmd->device->id, &tstate);
	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
	 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
		col_idx = AHD_NEVER_COL_IDX;
	} else {
		col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
					    cmd->device->lun);
	}
	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
		ahd->flags |= AHD_RESOURCE_SHORTAGE;
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		ahd_unlock(ahd, &flags);
1434
		return SCSI_MLQUEUE_HOST_BUSY;
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	}

1437 1438 1439 1440
	scb->io_ctx = cmd;
	scb->platform_data->dev = dev;
	hscb = scb->hscb;
	cmd->host_scribble = (char *)scb;
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1442 1443 1444 1445 1446 1447 1448 1449
	/*
	 * Fill out basics of the HSCB.
	 */
	hscb->control = 0;
	hscb->scsiid = BUILD_SCSIID(ahd, cmd);
	hscb->lun = cmd->device->lun;
	scb->hscb->task_management = 0;
	mask = SCB_GET_TARGET_MASK(ahd, scb);
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1451 1452
	if ((ahd->user_discenable & mask) != 0)
		hscb->control |= DISCENB;
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1454 1455
	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
		scb->flags |= SCB_PACKETIZED;
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1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477
	if ((tstate->auto_negotiate & mask) != 0) {
		scb->flags |= SCB_AUTO_NEGOTIATE;
		scb->hscb->control |= MK_MESSAGE;
	}

	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
		int	msg_bytes;
		uint8_t tag_msgs[2];

		msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
		if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
			hscb->control |= tag_msgs[0];
			if (tag_msgs[0] == MSG_ORDERED_TASK)
				dev->commands_since_idle_or_otag = 0;
		} else
		if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
		 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
			hscb->control |= MSG_ORDERED_TASK;
			dev->commands_since_idle_or_otag = 0;
		} else {
			hscb->control |= MSG_SIMPLE_TASK;
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		}
1479
	}
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1481 1482 1483 1484 1485 1486 1487
	hscb->cdb_len = cmd->cmd_len;
	memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);

	scb->platform_data->xfer_len = 0;
	ahd_set_residual(scb, 0);
	ahd_set_sense_residual(scb, 0);
	scb->sg_count = 0;
1488 1489 1490 1491 1492 1493 1494 1495

	nseg = scsi_dma_map(cmd);
	BUG_ON(nseg < 0);
	if (nseg > 0) {
		void *sg = scb->sg_list;
		struct scatterlist *cur_seg;
		int i;

1496
		scb->platform_data->xfer_len = 0;
1497 1498

		scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1499 1500 1501 1502 1503 1504 1505
			dma_addr_t addr;
			bus_size_t len;

			addr = sg_dma_address(cur_seg);
			len = sg_dma_len(cur_seg);
			scb->platform_data->xfer_len += len;
			sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1506
					  i == (nseg - 1));
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		}
	}
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519

	LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
	dev->openings--;
	dev->active++;
	dev->commands_issued++;

	if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
		dev->commands_since_idle_or_otag++;
	scb->flags |= SCB_ACTIVE;
	ahd_queue_scb(ahd, scb);

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	ahd_unlock(ahd, &flags);

1522
	return 0;
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}

1525 1526 1527 1528
/*
 * SCSI controller interrupt handler.
 */
irqreturn_t
1529
ahd_linux_isr(int irq, void *dev_id)
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{
1531 1532 1533
	struct	ahd_softc *ahd;
	u_long	flags;
	int	ours;
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1535 1536 1537 1538 1539
	ahd = (struct ahd_softc *) dev_id;
	ahd_lock(ahd, &flags); 
	ours = ahd_intr(ahd);
	ahd_unlock(ahd, &flags);
	return IRQ_RETVAL(ours);
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}

void
1543
ahd_send_async(struct ahd_softc *ahd, char channel,
1544
	       u_int target, u_int lun, ac_code code)
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{
1546 1547 1548 1549 1550 1551 1552 1553 1554
	switch (code) {
	case AC_TRANSFER_NEG:
	{
		char	buf[80];
		struct  scsi_target *starget;
		struct	info_str info;
		struct	ahd_initiator_tinfo *tinfo;
		struct	ahd_tmode_tstate *tstate;
		unsigned int target_ppr_options;
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1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580
		BUG_ON(target == CAM_TARGET_WILDCARD);

		info.buffer = buf;
		info.length = sizeof(buf);
		info.offset = 0;
		info.pos = 0;
		tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
					    target, &tstate);

		/*
		 * Don't bother reporting results while
		 * negotiations are still pending.
		 */
		if (tinfo->curr.period != tinfo->goal.period
		 || tinfo->curr.width != tinfo->goal.width
		 || tinfo->curr.offset != tinfo->goal.offset
		 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
			if (bootverbose == 0)
				break;

		/*
		 * Don't bother reporting results that
		 * are identical to those last reported.
		 */
		starget = ahd->platform_data->starget[target];
1581
		if (starget == NULL)
1582 1583 1584 1585 1586
			break;

		target_ppr_options =
			(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
			+ (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1587 1588 1589 1590
			+ (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
			+ (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
			+ (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
			+ (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1591 1592
			+ (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
			+ (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603

		if (tinfo->curr.period == spi_period(starget)
		    && tinfo->curr.width == spi_width(starget)
		    && tinfo->curr.offset == spi_offset(starget)
		 && tinfo->curr.ppr_options == target_ppr_options)
			if (bootverbose == 0)
				break;

		spi_period(starget) = tinfo->curr.period;
		spi_width(starget) = tinfo->curr.width;
		spi_offset(starget) = tinfo->curr.offset;
1604 1605 1606
		spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
		spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
		spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1607 1608 1609 1610
		spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
		spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
		spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
		spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1611
		spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1612
		spi_display_xfer_agreement(starget);
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Linus Torvalds 已提交
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		break;
1614 1615 1616 1617 1618 1619
	}
        case AC_SENT_BDR:
	{
		WARN_ON(lun != CAM_LUN_WILDCARD);
		scsi_report_device_reset(ahd->platform_data->host,
					 channel - 'A', target);
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		break;
	}
1622 1623 1624 1625
        case AC_BUS_RESET:
		if (ahd->platform_data->host != NULL) {
			scsi_report_bus_reset(ahd->platform_data->host,
					      channel - 'A');
L
Linus Torvalds 已提交
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		}
1627 1628 1629 1630
                break;
        default:
                panic("ahd_send_async: Unexpected async event");
        }
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1631 1632
}

1633 1634 1635 1636 1637
/*
 * Calls the higher level scsi done function and frees the scb.
 */
void
ahd_done(struct ahd_softc *ahd, struct scb *scb)
L
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1638
{
1639 1640
	struct scsi_cmnd *cmd;
	struct	  ahd_linux_device *dev;
L
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1642 1643 1644 1645
	if ((scb->flags & SCB_ACTIVE) == 0) {
		printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
		ahd_dump_card_state(ahd);
		panic("Stopping for safety");
L
Linus Torvalds 已提交
1646
	}
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
	LIST_REMOVE(scb, pending_links);
	cmd = scb->io_ctx;
	dev = scb->platform_data->dev;
	dev->active--;
	dev->openings++;
	if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
		cmd->result &= ~(CAM_DEV_QFRZN << 16);
		dev->qfrozen--;
	}
	ahd_linux_unmap_scb(ahd, scb);
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1657 1658

	/*
1659 1660 1661 1662
	 * Guard against stale sense data.
	 * The Linux mid-layer assumes that sense
	 * was retrieved anytime the first byte of
	 * the sense buffer looks "sane".
L
Linus Torvalds 已提交
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	 */
1664 1665 1666
	cmd->sense_buffer[0] = 0;
	if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
		uint32_t amount_xferred;
L
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1668 1669 1670
		amount_xferred =
		    ahd_get_transfer_length(scb) - ahd_get_residual(scb);
		if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
L
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#ifdef AHD_DEBUG
1672 1673 1674 1675
			if ((ahd_debug & AHD_SHOW_MISC) != 0) {
				ahd_print_path(ahd, scb);
				printf("Set CAM_UNCOR_PARITY\n");
			}
L
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#endif
1677 1678
			ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
#ifdef AHD_REPORT_UNDERFLOWS
L
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1679
		/*
1680 1681 1682 1683 1684 1685 1686
		 * This code is disabled by default as some
		 * clients of the SCSI system do not properly
		 * initialize the underflow parameter.  This
		 * results in spurious termination of commands
		 * that complete as expected (e.g. underflow is
		 * allowed as command can return variable amounts
		 * of data.
L
Linus Torvalds 已提交
1687
		 */
1688 1689
		} else if (amount_xferred < scb->io_ctx->underflow) {
			u_int i;
L
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1690

1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704
			ahd_print_path(ahd, scb);
			printf("CDB:");
			for (i = 0; i < scb->io_ctx->cmd_len; i++)
				printf(" 0x%x", scb->io_ctx->cmnd[i]);
			printf("\n");
			ahd_print_path(ahd, scb);
			printf("Saw underflow (%ld of %ld bytes). "
			       "Treated as error\n",
				ahd_get_residual(scb),
				ahd_get_transfer_length(scb));
			ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
#endif
		} else {
			ahd_set_transaction_status(scb, CAM_REQ_CMP);
L
Linus Torvalds 已提交
1705
		}
1706 1707 1708
	} else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
		ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
	}
L
Linus Torvalds 已提交
1709

1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724
	if (dev->openings == 1
	 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
	 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
		dev->tag_success_count++;
	/*
	 * Some devices deal with temporary internal resource
	 * shortages by returning queue full.  When the queue
	 * full occurrs, we throttle back.  Slowly try to get
	 * back to our previous queue depth.
	 */
	if ((dev->openings + dev->active) < dev->maxtags
	 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
		dev->tag_success_count = 0;
		dev->openings++;
	}
L
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1725

1726 1727
	if (dev->active == 0)
		dev->commands_since_idle_or_otag = 0;
L
Linus Torvalds 已提交
1728

1729 1730 1731 1732 1733
	if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
		printf("Recovery SCB completes\n");
		if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
		 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
			ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
H
Hannes Reinecke 已提交
1734 1735 1736

		if (ahd->platform_data->eh_done)
			complete(ahd->platform_data->eh_done);
L
Linus Torvalds 已提交
1737
	}
1738 1739 1740

	ahd_free_scb(ahd, scb);
	ahd_linux_queue_cmd_complete(ahd, cmd);
L
Linus Torvalds 已提交
1741 1742 1743
}

static void
1744 1745
ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
			     struct scsi_device *sdev, struct scb *scb)
L
Linus Torvalds 已提交
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{
1747 1748
	struct	ahd_devinfo devinfo;
	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
L
Linus Torvalds 已提交
1749

1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
	ahd_compile_devinfo(&devinfo,
			    ahd->our_id,
			    sdev->sdev_target->id, sdev->lun,
			    sdev->sdev_target->channel == 0 ? 'A' : 'B',
			    ROLE_INITIATOR);
	
	/*
	 * We don't currently trust the mid-layer to
	 * properly deal with queue full or busy.  So,
	 * when one occurs, we tell the mid-layer to
	 * unconditionally requeue the command to us
	 * so that we can retry it ourselves.  We also
	 * implement our own throttling mechanism so
	 * we don't clobber the device with too many
	 * commands.
	 */
	switch (ahd_get_scsi_status(scb)) {
	default:
		break;
	case SCSI_STATUS_CHECK_COND:
	case SCSI_STATUS_CMD_TERMINATED:
	{
		struct scsi_cmnd *cmd;
L
Linus Torvalds 已提交
1773 1774

		/*
1775 1776
		 * Copy sense information to the OS's cmd
		 * structure if it is available.
L
Linus Torvalds 已提交
1777
		 */
1778 1779 1780 1781 1782
		cmd = scb->io_ctx;
		if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
			struct scsi_status_iu_header *siu;
			u_int sense_size;
			u_int sense_offset;
L
Linus Torvalds 已提交
1783

1784
			if (scb->flags & SCB_SENSE) {
1785
				sense_size = min(sizeof(struct scsi_sense_data)
1786
					       - ahd_get_sense_residual(scb),
1787
						 (u_long)SCSI_SENSE_BUFFERSIZE);
1788 1789 1790 1791 1792 1793 1794 1795
				sense_offset = 0;
			} else {
				/*
				 * Copy only the sense data into the provided
				 * buffer.
				 */
				siu = (struct scsi_status_iu_header *)
				    scb->sense_data;
1796 1797
				sense_size = min_t(size_t,
						scsi_4btoul(siu->sense_length),
1798
						SCSI_SENSE_BUFFERSIZE);
1799 1800
				sense_offset = SIU_SENSE_OFFSET(siu);
			}
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Linus Torvalds 已提交
1801

1802
			memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1803 1804 1805 1806
			memcpy(cmd->sense_buffer,
			       ahd_get_sense_buf(ahd, scb)
			       + sense_offset, sense_size);
			cmd->result |= (DRIVER_SENSE << 24);
L
Linus Torvalds 已提交
1807 1808

#ifdef AHD_DEBUG
1809 1810
			if (ahd_debug & AHD_SHOW_SENSE) {
				int i;
L
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1811

1812 1813 1814
				printf("Copied %d bytes of sense data at %d:",
				       sense_size, sense_offset);
				for (i = 0; i < sense_size; i++) {
L
Linus Torvalds 已提交
1815
					if ((i & 0xF) == 0)
1816 1817
						printf("\n");
					printf("0x%x ", cmd->sense_buffer[i]);
L
Linus Torvalds 已提交
1818 1819 1820 1821 1822 1823
				}
				printf("\n");
			}
#endif
		}
		break;
1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
	}
	case SCSI_STATUS_QUEUE_FULL:
		/*
		 * By the time the core driver has returned this
		 * command, all other commands that were queued
		 * to us but not the device have been returned.
		 * This ensures that dev->active is equal to
		 * the number of commands actually queued to
		 * the device.
		 */
		dev->tag_success_count = 0;
		if (dev->active != 0) {
L
Linus Torvalds 已提交
1836
			/*
1837 1838
			 * Drop our opening count to the number
			 * of commands currently outstanding.
L
Linus Torvalds 已提交
1839
			 */
1840
			dev->openings = 0;
L
Linus Torvalds 已提交
1841
#ifdef AHD_DEBUG
1842 1843 1844 1845
			if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
				ahd_print_path(ahd, scb);
				printf("Dropping tag count to %d\n",
				       dev->active);
L
Linus Torvalds 已提交
1846 1847
			}
#endif
1848
			if (dev->active == dev->tags_on_last_queuefull) {
L
Linus Torvalds 已提交
1849

1850
				dev->last_queuefull_same_count++;
L
Linus Torvalds 已提交
1851
				/*
1852 1853 1854 1855 1856 1857
				 * If we repeatedly see a queue full
				 * at the same queue depth, this
				 * device has a fixed number of tag
				 * slots.  Lock in this tag depth
				 * so we stop seeing queue fulls from
				 * this device.
L
Linus Torvalds 已提交
1858
				 */
1859 1860 1861 1862 1863 1864
				if (dev->last_queuefull_same_count
				 == AHD_LOCK_TAGS_COUNT) {
					dev->maxtags = dev->active;
					ahd_print_path(ahd, scb);
					printf("Locking max tag count at %d\n",
					       dev->active);
L
Linus Torvalds 已提交
1865
				}
1866 1867 1868
			} else {
				dev->tags_on_last_queuefull = dev->active;
				dev->last_queuefull_same_count = 0;
L
Linus Torvalds 已提交
1869
			}
1870 1871
			ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
			ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1872
			ahd_platform_set_tags(ahd, sdev, &devinfo,
1873 1874
				     (dev->flags & AHD_DEV_Q_BASIC)
				   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
L
Linus Torvalds 已提交
1875 1876 1877
			break;
		}
		/*
1878 1879
		 * Drop down to a single opening, and treat this
		 * as if the target returned BUSY SCSI status.
L
Linus Torvalds 已提交
1880
		 */
1881
		dev->openings = 1;
1882
		ahd_platform_set_tags(ahd, sdev, &devinfo,
1883 1884 1885 1886
			     (dev->flags & AHD_DEV_Q_BASIC)
			   ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
		ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
	}
L
Linus Torvalds 已提交
1887 1888
}

1889 1890
static void
ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
L
Linus Torvalds 已提交
1891
{
1892 1893 1894 1895 1896
	int status;
	int new_status = DID_OK;
	int do_fallback = 0;
	int scsi_status;

L
Linus Torvalds 已提交
1897
	/*
1898 1899 1900 1901
	 * Map CAM error codes into Linux Error codes.  We
	 * avoid the conversion so that the DV code has the
	 * full error information available when making
	 * state change decisions.
L
Linus Torvalds 已提交
1902
	 */
1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930

	status = ahd_cmd_get_transaction_status(cmd);
	switch (status) {
	case CAM_REQ_INPROG:
	case CAM_REQ_CMP:
		new_status = DID_OK;
		break;
	case CAM_AUTOSENSE_FAIL:
		new_status = DID_ERROR;
		/* Fallthrough */
	case CAM_SCSI_STATUS_ERROR:
		scsi_status = ahd_cmd_get_scsi_status(cmd);

		switch(scsi_status) {
		case SCSI_STATUS_CMD_TERMINATED:
		case SCSI_STATUS_CHECK_COND:
			if ((cmd->result >> 24) != DRIVER_SENSE) {
				do_fallback = 1;
			} else {
				struct scsi_sense_data *sense;
				
				sense = (struct scsi_sense_data *)
					&cmd->sense_buffer;
				if (sense->extra_len >= 5 &&
				    (sense->add_sense_code == 0x47
				     || sense->add_sense_code == 0x48))
					do_fallback = 1;
			}
1931 1932 1933 1934
			break;
		default:
			break;
		}
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984
		break;
	case CAM_REQ_ABORTED:
		new_status = DID_ABORT;
		break;
	case CAM_BUSY:
		new_status = DID_BUS_BUSY;
		break;
	case CAM_REQ_INVALID:
	case CAM_PATH_INVALID:
		new_status = DID_BAD_TARGET;
		break;
	case CAM_SEL_TIMEOUT:
		new_status = DID_NO_CONNECT;
		break;
	case CAM_SCSI_BUS_RESET:
	case CAM_BDR_SENT:
		new_status = DID_RESET;
		break;
	case CAM_UNCOR_PARITY:
		new_status = DID_PARITY;
		do_fallback = 1;
		break;
	case CAM_CMD_TIMEOUT:
		new_status = DID_TIME_OUT;
		do_fallback = 1;
		break;
	case CAM_REQ_CMP_ERR:
	case CAM_UNEXP_BUSFREE:
	case CAM_DATA_RUN_ERR:
		new_status = DID_ERROR;
		do_fallback = 1;
		break;
	case CAM_UA_ABORT:
	case CAM_NO_HBA:
	case CAM_SEQUENCE_FAIL:
	case CAM_CCB_LEN_ERR:
	case CAM_PROVIDE_FAIL:
	case CAM_REQ_TERMIO:
	case CAM_UNREC_HBA_ERROR:
	case CAM_REQ_TOO_BIG:
		new_status = DID_ERROR;
		break;
	case CAM_REQUEUE_REQ:
		new_status = DID_REQUEUE;
		break;
	default:
		/* We should never get here */
		new_status = DID_ERROR;
		break;
	}
1985

1986 1987 1988 1989
	if (do_fallback) {
		printf("%s: device overrun (status %x) on %d:%d:%d\n",
		       ahd_name(ahd), status, cmd->device->channel,
		       cmd->device->id, cmd->device->lun);
1990 1991
	}

1992 1993
	ahd_cmd_set_transaction_status(cmd, new_status);

1994
	cmd->scsi_done(cmd);
L
Linus Torvalds 已提交
1995 1996
}

1997
static void
1998
ahd_freeze_simq(struct ahd_softc *ahd)
L
Linus Torvalds 已提交
1999
{
H
Hannes Reinecke 已提交
2000
	scsi_block_requests(ahd->platform_data->host);
L
Linus Torvalds 已提交
2001 2002
}

2003
static void
2004
ahd_release_simq(struct ahd_softc *ahd)
L
Linus Torvalds 已提交
2005
{
H
Hannes Reinecke 已提交
2006
	scsi_unblock_requests(ahd->platform_data->host);
2007
}
L
Linus Torvalds 已提交
2008

2009
static int
2010
ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
{
	struct ahd_softc *ahd;
	struct ahd_linux_device *dev;
	struct scb *pending_scb;
	u_int  saved_scbptr;
	u_int  active_scbptr;
	u_int  last_phase;
	u_int  saved_scsiid;
	u_int  cdb_byte;
	int    retval;
	int    was_paused;
	int    paused;
	int    wait;
	int    disconnected;
	ahd_mode_state saved_modes;
2026
	unsigned long flags;
2027 2028 2029 2030 2031 2032

	pending_scb = NULL;
	paused = FALSE;
	wait = FALSE;
	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;

J
Jeff Garzik 已提交
2033
	scmd_printk(KERN_INFO, cmd,
2034
		    "Attempting to queue an ABORT message:");
2035 2036 2037 2038 2039 2040

	printf("CDB:");
	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
		printf(" 0x%x", cmd->cmnd[cdb_byte]);
	printf("\n");

2041
	ahd_lock(ahd, &flags);
L
Linus Torvalds 已提交
2042 2043

	/*
2044 2045 2046 2047 2048
	 * First determine if we currently own this command.
	 * Start by searching the device queue.  If not found
	 * there, check the pending_scb list.  If not found
	 * at all, and the system wanted us to just abort the
	 * command, return success.
L
Linus Torvalds 已提交
2049
	 */
2050 2051 2052 2053 2054 2055 2056
	dev = scsi_transport_device_data(cmd->device);

	if (dev == NULL) {
		/*
		 * No target device for this command exists,
		 * so we must not still own the command.
		 */
J
Jeff Garzik 已提交
2057
		scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2058 2059 2060
		retval = SUCCESS;
		goto no_cmd;
	}
L
Linus Torvalds 已提交
2061 2062

	/*
2063
	 * See if we can find a matching cmd in the pending list.
L
Linus Torvalds 已提交
2064
	 */
2065 2066 2067
	LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
		if (pending_scb->io_ctx == cmd)
			break;
L
Linus Torvalds 已提交
2068 2069
	}

2070
	if (pending_scb == NULL) {
J
Jeff Garzik 已提交
2071
		scmd_printk(KERN_INFO, cmd, "Command not found\n");
2072
		goto no_cmd;
L
Linus Torvalds 已提交
2073 2074
	}

2075 2076 2077 2078 2079 2080 2081
	if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
		/*
		 * We can't queue two recovery actions using the same SCB
		 */
		retval = FAILED;
		goto  done;
	}
L
Linus Torvalds 已提交
2082 2083

	/*
2084 2085 2086 2087
	 * Ensure that the card doesn't do anything
	 * behind our back.  Also make sure that we
	 * didn't "just" miss an interrupt that would
	 * affect this cmd.
L
Linus Torvalds 已提交
2088
	 */
2089 2090 2091
	was_paused = ahd_is_paused(ahd);
	ahd_pause_and_flushwork(ahd);
	paused = TRUE;
L
Linus Torvalds 已提交
2092

2093
	if ((pending_scb->flags & SCB_ACTIVE) == 0) {
J
Jeff Garzik 已提交
2094
		scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2095 2096
		goto no_cmd;
	}
L
Linus Torvalds 已提交
2097

2098 2099 2100
	printf("%s: At time of recovery, card was %spaused\n",
	       ahd_name(ahd), was_paused ? "" : "not ");
	ahd_dump_card_state(ahd);
L
Linus Torvalds 已提交
2101

2102
	disconnected = TRUE;
2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113
	if (ahd_search_qinfifo(ahd, cmd->device->id, 
			       cmd->device->channel + 'A',
			       cmd->device->lun, 
			       pending_scb->hscb->tag,
			       ROLE_INITIATOR, CAM_REQ_ABORTED,
			       SEARCH_COMPLETE) > 0) {
		printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
		       ahd_name(ahd), cmd->device->channel, 
		       cmd->device->id, cmd->device->lun);
		retval = SUCCESS;
		goto done;
2114
	}
L
Linus Torvalds 已提交
2115

2116 2117 2118 2119 2120
	saved_modes = ahd_save_modes(ahd);
	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
	last_phase = ahd_inb(ahd, LASTPHASE);
	saved_scbptr = ahd_get_scbptr(ahd);
	active_scbptr = saved_scbptr;
2121
	if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2122
		struct scb *bus_scb;
L
Linus Torvalds 已提交
2123

2124 2125 2126
		bus_scb = ahd_lookup_scb(ahd, active_scbptr);
		if (bus_scb == pending_scb)
			disconnected = FALSE;
L
Linus Torvalds 已提交
2127
	}
2128 2129 2130 2131 2132 2133 2134

	/*
	 * At this point, pending_scb is the scb associated with the
	 * passed in command.  That command is currently active on the
	 * bus or is in the disconnected state.
	 */
	saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2135 2136
	if (last_phase != P_BUSFREE
	    && SCB_GET_TAG(pending_scb) == active_scbptr) {
2137

L
Linus Torvalds 已提交
2138
		/*
2139 2140
		 * We're active on the bus, so assert ATN
		 * and hope that the target responds.
L
Linus Torvalds 已提交
2141
		 */
2142
		pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2143
		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2144 2145
		ahd_outb(ahd, MSG_OUT, HOST_MSG);
		ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2146
		scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2147 2148 2149 2150 2151 2152 2153
		wait = TRUE;
	} else if (disconnected) {

		/*
		 * Actually re-queue this SCB in an attempt
		 * to select the device before it reconnects.
		 */
2154
		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2155 2156 2157 2158 2159 2160
		ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
		pending_scb->hscb->cdb_len = 0;
		pending_scb->hscb->task_attribute = 0;
		pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;

		if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
L
Linus Torvalds 已提交
2161
			/*
2162 2163 2164 2165 2166
			 * Mark the SCB has having an outstanding
			 * task management function.  Should the command
			 * complete normally before the task management
			 * function can be sent, the host will be notified
			 * to abort our requeued SCB.
L
Linus Torvalds 已提交
2167
			 */
2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189
			ahd_outb(ahd, SCB_TASK_MANAGEMENT,
				 pending_scb->hscb->task_management);
		} else {
			/*
			 * If non-packetized, set the MK_MESSAGE control
			 * bit indicating that we desire to send a message.
			 * We also set the disconnected flag since there is
			 * no guarantee that our SCB control byte matches
			 * the version on the card.  We don't want the
			 * sequencer to abort the command thinking an
			 * unsolicited reselection occurred.
			 */
			pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;

			/*
			 * The sequencer will never re-reference the
			 * in-core SCB.  To make sure we are notified
			 * during reslection, set the MK_MESSAGE flag in
			 * the card's copy of the SCB.
			 */
			ahd_outb(ahd, SCB_CONTROL,
				 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
L
Linus Torvalds 已提交
2190
		}
2191

L
Linus Torvalds 已提交
2192
		/*
2193 2194 2195
		 * Clear out any entries in the QINFIFO first
		 * so we are the next SCB for this target
		 * to run.
L
Linus Torvalds 已提交
2196
		 */
2197 2198 2199 2200 2201 2202 2203 2204 2205 2206
		ahd_search_qinfifo(ahd, cmd->device->id,
				   cmd->device->channel + 'A', cmd->device->lun,
				   SCB_LIST_NULL, ROLE_INITIATOR,
				   CAM_REQUEUE_REQ, SEARCH_COMPLETE);
		ahd_qinfifo_requeue_tail(ahd, pending_scb);
		ahd_set_scbptr(ahd, saved_scbptr);
		ahd_print_path(ahd, pending_scb);
		printf("Device is disconnected, re-queuing SCB\n");
		wait = TRUE;
	} else {
J
Jeff Garzik 已提交
2207
		scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2208 2209
		retval = FAILED;
		goto done;
L
Linus Torvalds 已提交
2210 2211
	}

2212
no_cmd:
L
Linus Torvalds 已提交
2213
	/*
2214 2215 2216 2217
	 * Our assumption is that if we don't have the command, no
	 * recovery action was required, so we return success.  Again,
	 * the semantics of the mid-layer recovery engine are not
	 * well defined, so this may change in time.
L
Linus Torvalds 已提交
2218
	 */
2219 2220 2221 2222 2223
	retval = SUCCESS;
done:
	if (paused)
		ahd_unpause(ahd);
	if (wait) {
2224
		DECLARE_COMPLETION_ONSTACK(done);
L
Linus Torvalds 已提交
2225

H
Hannes Reinecke 已提交
2226
		ahd->platform_data->eh_done = &done;
2227 2228
		ahd_unlock(ahd, &flags);

2229
		printf("%s: Recovery code sleeping\n", ahd_name(ahd));
H
Hannes Reinecke 已提交
2230 2231 2232 2233
		if (!wait_for_completion_timeout(&done, 5 * HZ)) {
			ahd_lock(ahd, &flags);
			ahd->platform_data->eh_done = NULL;
			ahd_unlock(ahd, &flags);
2234 2235
			printf("%s: Timer Expired (active %d)\n",
			       ahd_name(ahd), dev->active);
2236
			retval = FAILED;
L
Linus Torvalds 已提交
2237
		}
H
Hannes Reinecke 已提交
2238
		printf("Recovery code awake\n");
2239 2240 2241
	} else
		ahd_unlock(ahd, &flags);

H
Hannes Reinecke 已提交
2242 2243 2244 2245 2246
	if (retval != SUCCESS)
		printf("%s: Command abort returning 0x%x\n",
		       ahd_name(ahd), retval);

	return retval;
L
Linus Torvalds 已提交
2247 2248
}

2249
static void ahd_linux_set_width(struct scsi_target *starget, int width)
L
Linus Torvalds 已提交
2250
{
2251 2252 2253 2254
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_devinfo devinfo;
	unsigned long flags;
L
Linus Torvalds 已提交
2255

2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_lock(ahd, &flags);
	ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}

static void ahd_linux_set_period(struct scsi_target *starget, int period)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options;
2274
	unsigned int dt;
2275 2276
	unsigned long flags;
	unsigned long offset = tinfo->goal.offset;
L
Linus Torvalds 已提交
2277

2278 2279 2280 2281
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: set period to %d\n", ahd_name(ahd), period);
#endif
2282 2283
	if (offset == 0)
		offset = MAX_OFFSET;
L
Linus Torvalds 已提交
2284

2285 2286 2287
	if (period < 8)
		period = 8;
	if (period < 10) {
2288 2289 2290 2291 2292 2293
		if (spi_max_width(starget)) {
			ppr_options |= MSG_EXT_PPR_DT_REQ;
			if (period == 8)
				ppr_options |= MSG_EXT_PPR_IU_REQ;
		} else
			period = 10;
L
Linus Torvalds 已提交
2294 2295
	}

2296 2297
	dt = ppr_options & MSG_EXT_PPR_DT_REQ;

2298 2299
	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
L
Linus Torvalds 已提交
2300

2301 2302 2303 2304
	/* all PPR requests apart from QAS require wide transfers */
	if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
		if (spi_width(starget) == 0)
			ppr_options &= MSG_EXT_PPR_QAS_REQ;
L
Linus Torvalds 已提交
2305
	}
2306

2307 2308 2309
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);

2310 2311 2312 2313
	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
L
Linus Torvalds 已提交
2314 2315
}

2316
static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
L
Linus Torvalds 已提交
2317
{
2318 2319 2320 2321 2322 2323 2324 2325 2326 2327
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = 0;
	unsigned int period = 0;
2328
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2329 2330
	unsigned long flags;

2331 2332 2333 2334 2335
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: set offset to %d\n", ahd_name(ahd), offset);
#endif

2336 2337 2338 2339 2340
	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	if (offset != 0) {
		period = tinfo->goal.period;
		ppr_options = tinfo->goal.ppr_options;
2341 2342
		ahd_find_syncrate(ahd, &period, &ppr_options, 
				  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
L
Linus Torvalds 已提交
2343
	}
2344

2345 2346 2347 2348
	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
			 AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
L
Linus Torvalds 已提交
2349 2350
}

2351
static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
L
Linus Torvalds 已提交
2352
{
2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_DT_REQ;
	unsigned int period = tinfo->goal.period;
2364
	unsigned int width = tinfo->goal.width;
2365 2366
	unsigned long flags;

2367 2368 2369 2370 2371
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s DT\n", ahd_name(ahd), 
		       dt ? "enabling" : "disabling");
#endif
2372
	if (dt && spi_max_width(starget)) {
2373
		ppr_options |= MSG_EXT_PPR_DT_REQ;
2374 2375
		if (!width)
			ahd_linux_set_width(starget, 1);
2376 2377 2378 2379 2380 2381
	} else {
		if (period <= 9)
			period = 10; /* If resetting DT, period must be >= 25ns */
		/* IU is invalid without DT set */
		ppr_options &= ~MSG_EXT_PPR_IU_REQ;
	}
2382 2383 2384 2385
	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2386

2387 2388 2389 2390
	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
L
Linus Torvalds 已提交
2391 2392
}

2393
static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
L
Linus Torvalds 已提交
2394
{
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_QAS_REQ;
	unsigned int period = tinfo->goal.period;
2406
	unsigned int dt;
2407 2408
	unsigned long flags;

2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s QAS\n", ahd_name(ahd), 
		       qas ? "enabling" : "disabling");
#endif

	if (qas) {
		ppr_options |= MSG_EXT_PPR_QAS_REQ; 
	}

	dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2420 2421 2422 2423 2424

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2425

2426 2427 2428 2429
	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
L
Linus Torvalds 已提交
2430 2431
}

2432
static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
L
Linus Torvalds 已提交
2433
{
2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_IU_REQ;
	unsigned int period = tinfo->goal.period;
2445
	unsigned int dt;
2446 2447
	unsigned long flags;

2448 2449 2450 2451 2452 2453
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s IU\n", ahd_name(ahd),
		       iu ? "enabling" : "disabling");
#endif

2454
	if (iu && spi_max_width(starget)) {
2455
		ppr_options |= MSG_EXT_PPR_IU_REQ;
2456 2457 2458 2459
		ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
	}

	dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2460 2461 2462 2463 2464

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2465

2466 2467 2468 2469 2470
	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}
L
Linus Torvalds 已提交
2471

2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487
static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_RD_STRM;
	unsigned int period = tinfo->goal.period;
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
	unsigned long flags;

2488 2489 2490 2491 2492 2493
#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s Read Streaming\n", ahd_name(ahd), 
		       rdstrm  ? "enabling" : "disabling");
#endif

2494
	if (rdstrm && spi_max_width(starget))
2495 2496 2497 2498 2499 2500
		ppr_options |= MSG_EXT_PPR_RD_STRM;

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529

	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}

static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_WR_FLOW;
	unsigned int period = tinfo->goal.period;
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
	unsigned long flags;

#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s Write Flow Control\n", ahd_name(ahd),
		       wrflow ? "enabling" : "disabling");
#endif

2530
	if (wrflow && spi_max_width(starget))
2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
		ppr_options |= MSG_EXT_PPR_WR_FLOW;

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);

	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}

static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_RTI;
	unsigned int period = tinfo->goal.period;
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
	unsigned long flags;

	if ((ahd->features & AHD_RTI) == 0) {
#ifdef AHD_DEBUG
		if ((ahd_debug & AHD_SHOW_DV) != 0)
			printf("%s: RTI not available\n", ahd_name(ahd));
#endif
		return;
	}

#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s RTI\n", ahd_name(ahd),
		       rti ? "enabling" : "disabling");
#endif

2574
	if (rti && spi_max_width(starget))
2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609
		ppr_options |= MSG_EXT_PPR_RTI;

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);

	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}

static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_PCOMP_EN;
	unsigned int period = tinfo->goal.period;
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
	unsigned long flags;

#ifdef AHD_DEBUG
	if ((ahd_debug & AHD_SHOW_DV) != 0)
		printf("%s: %s Precompensation\n", ahd_name(ahd), 
		       pcomp ? "Enable" : "Disable");
#endif

2610
	if (pcomp && spi_max_width(starget)) {
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		uint8_t precomp;

		if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
			struct ahd_linux_iocell_opts *iocell_opts;

			iocell_opts = &aic79xx_iocell_info[ahd->unit];
			precomp = iocell_opts->precomp;
		} else {
			precomp = AIC79XX_DEFAULT_PRECOMP;
		}
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		ppr_options |= MSG_EXT_PPR_PCOMP_EN;
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		AHD_SET_PRECOMP(ahd, precomp);
	} else {
		AHD_SET_PRECOMP(ahd, 0);
	}
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	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);

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	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
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}

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static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
{
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
	struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
	struct ahd_tmode_tstate *tstate;
	struct ahd_initiator_tinfo *tinfo 
		= ahd_fetch_transinfo(ahd,
				      starget->channel + 'A',
				      shost->this_id, starget->id, &tstate);
	struct ahd_devinfo devinfo;
	unsigned int ppr_options = tinfo->goal.ppr_options
		& ~MSG_EXT_PPR_HOLD_MCS;
	unsigned int period = tinfo->goal.period;
	unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
	unsigned long flags;

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	if (hold && spi_max_width(starget))
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		ppr_options |= MSG_EXT_PPR_HOLD_MCS;

	ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
			    starget->channel + 'A', ROLE_INITIATOR);
	ahd_find_syncrate(ahd, &period, &ppr_options,
			  dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);

	ahd_lock(ahd, &flags);
	ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
			 ppr_options, AHD_TRANS_GOAL, FALSE);
	ahd_unlock(ahd, &flags);
}

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static void ahd_linux_get_signalling(struct Scsi_Host *shost)
{
	struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
	unsigned long flags;
	u8 mode;
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	ahd_lock(ahd, &flags);
	ahd_pause(ahd);
	mode = ahd_inb(ahd, SBLKCTL);
	ahd_unpause(ahd);
	ahd_unlock(ahd, &flags);

	if (mode & ENAB40)
		spi_signalling(shost) = SPI_SIGNAL_LVD;
	else if (mode & ENAB20)
		spi_signalling(shost) = SPI_SIGNAL_SE;
	else
		spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
}
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static struct spi_function_template ahd_linux_transport_functions = {
	.set_offset	= ahd_linux_set_offset,
	.show_offset	= 1,
	.set_period	= ahd_linux_set_period,
	.show_period	= 1,
	.set_width	= ahd_linux_set_width,
	.show_width	= 1,
	.set_dt		= ahd_linux_set_dt,
	.show_dt	= 1,
	.set_iu		= ahd_linux_set_iu,
	.show_iu	= 1,
	.set_qas	= ahd_linux_set_qas,
	.show_qas	= 1,
	.set_rd_strm	= ahd_linux_set_rd_strm,
	.show_rd_strm	= 1,
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	.set_wr_flow	= ahd_linux_set_wr_flow,
	.show_wr_flow	= 1,
	.set_rti	= ahd_linux_set_rti,
	.show_rti	= 1,
	.set_pcomp_en	= ahd_linux_set_pcomp_en,
	.show_pcomp_en	= 1,
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	.set_hold_mcs	= ahd_linux_set_hold_mcs,
	.show_hold_mcs	= 1,
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	.get_signalling = ahd_linux_get_signalling,
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};

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static int __init
ahd_linux_init(void)
{
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	int	error = 0;

	/*
	 * If we've been passed any parameters, process them now.
	 */
	if (aic79xx)
		aic79xx_setup(aic79xx);

	ahd_linux_transport_template =
		spi_attach_transport(&ahd_linux_transport_functions);
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	if (!ahd_linux_transport_template)
		return -ENODEV;
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	scsi_transport_reserve_device(ahd_linux_transport_template,
				      sizeof(struct ahd_linux_device));
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	error = ahd_linux_pci_init();
	if (error)
		spi_release_transport(ahd_linux_transport_template);
	return error;
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}

static void __exit
ahd_linux_exit(void)
{
	ahd_linux_pci_exit();
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	spi_release_transport(ahd_linux_transport_template);
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}

module_init(ahd_linux_init);
module_exit(ahd_linux_exit);