lpfc_scsi.c 178.6 KB
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/*******************************************************************
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 * This file is part of the Emulex Linux Device Driver for         *
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 * Fibre Channel Host Bus Adapters.                                *
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 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
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 * “Broadcom” refers to Broadcom Limited and/or its subsidiaries.  *
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 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
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 * EMULEX and SLI are trademarks of Emulex.                        *
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 * www.broadcom.com                                                *
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 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
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 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
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 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
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 *******************************************************************/
#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/export.h>
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#include <linux/delay.h>
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#include <asm/unaligned.h>
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#include <linux/t10-pi.h>
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#include <linux/crc-t10dif.h>
#include <net/checksum.h>
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#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_version.h"
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#include "lpfc_hw4.h"
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#include "lpfc_hw.h"
#include "lpfc_sli.h"
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#include "lpfc_sli4.h"
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#include "lpfc_nl.h"
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#include "lpfc_disc.h"
#include "lpfc.h"
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#include "lpfc_scsi.h"
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#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
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#include "lpfc_vport.h"
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#define LPFC_RESET_WAIT  2
#define LPFC_ABORT_WAIT  2

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int _dump_buf_done = 1;
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static char *dif_op_str[] = {
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	"PROT_NORMAL",
	"PROT_READ_INSERT",
	"PROT_WRITE_STRIP",
	"PROT_READ_STRIP",
	"PROT_WRITE_INSERT",
	"PROT_READ_PASS",
	"PROT_WRITE_PASS",
};

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struct scsi_dif_tuple {
	__be16 guard_tag;       /* Checksum */
	__be16 app_tag;         /* Opaque storage */
	__be32 ref_tag;         /* Target LBA or indirect LBA */
};

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static struct lpfc_rport_data *
lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
{
	struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;

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	if (vport->phba->cfg_fof)
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		return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
	else
		return (struct lpfc_rport_data *)sdev->hostdata;
}

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static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
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static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
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static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
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static void
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lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
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{
	void *src, *dst;
	struct scatterlist *sgde = scsi_sglist(cmnd);

	if (!_dump_buf_data) {
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		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
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				__func__);
		return;
	}


	if (!sgde) {
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		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9051 BLKGRD: ERROR: data scatterlist is null\n");
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		return;
	}

	dst = (void *) _dump_buf_data;
	while (sgde) {
		src = sg_virt(sgde);
		memcpy(dst, src, sgde->length);
		dst += sgde->length;
		sgde = sg_next(sgde);
	}
}

static void
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lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
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{
	void *src, *dst;
	struct scatterlist *sgde = scsi_prot_sglist(cmnd);

	if (!_dump_buf_dif) {
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		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
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				__func__);
		return;
	}

	if (!sgde) {
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		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9053 BLKGRD: ERROR: prot scatterlist is null\n");
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		return;
	}

	dst = _dump_buf_dif;
	while (sgde) {
		src = sg_virt(sgde);
		memcpy(dst, src, sgde->length);
		dst += sgde->length;
		sgde = sg_next(sgde);
	}
}

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static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
	return sc->device->sector_size;
}

#define LPFC_CHECK_PROTECT_GUARD	1
#define LPFC_CHECK_PROTECT_REF		2
static inline unsigned
lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
{
	return 1;
}

static inline unsigned
lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
{
	if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
		return 0;
	if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
		return 1;
	return 0;
}

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/**
 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 * @phba: Pointer to HBA object.
 * @lpfc_cmd: lpfc scsi command object pointer.
 *
 * This function is called from the lpfc_prep_task_mgmt_cmd function to
 * set the last bit in the response sge entry.
 **/
static void
lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
				struct lpfc_scsi_buf *lpfc_cmd)
{
	struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
	if (sgl) {
		sgl += 1;
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
	}
}

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/**
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 * lpfc_update_stats - Update statistical data for the command completion
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 * @phba: Pointer to HBA object.
 * @lpfc_cmd: lpfc scsi command object pointer.
 *
 * This function is called when there is a command completion and this
 * function updates the statistical data for the command completion.
 **/
static void
lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
{
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	unsigned long flags;
	struct Scsi_Host  *shost = cmd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	unsigned long latency;
	int i;

	if (cmd->result)
		return;

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	latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);

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	spin_lock_irqsave(shost->host_lock, flags);
	if (!vport->stat_data_enabled ||
		vport->stat_data_blocked ||
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		!pnode ||
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		!pnode->lat_data ||
		(phba->bucket_type == LPFC_NO_BUCKET)) {
		spin_unlock_irqrestore(shost->host_lock, flags);
		return;
	}

	if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
		i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
			phba->bucket_step;
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		/* check array subscript bounds */
		if (i < 0)
			i = 0;
		else if (i >= LPFC_MAX_BUCKET_COUNT)
			i = LPFC_MAX_BUCKET_COUNT - 1;
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	} else {
		for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
			if (latency <= (phba->bucket_base +
				((1<<i)*phba->bucket_step)))
				break;
	}

	pnode->lat_data[i].cmd_count++;
	spin_unlock_irqrestore(shost->host_lock, flags);
}

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/**
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 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
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 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called when there is resource error in driver or firmware.
 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 * posts at most 1 event each second. This routine wakes up worker thread of
 * @phba to process WORKER_RAM_DOWN_EVENT event.
 *
 * This routine should be called with no lock held.
 **/
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void
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lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
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{
	unsigned long flags;
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	uint32_t evt_posted;
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	unsigned long expires;
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	spin_lock_irqsave(&phba->hbalock, flags);
	atomic_inc(&phba->num_rsrc_err);
	phba->last_rsrc_error_time = jiffies;

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	expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
	if (time_after(expires, jiffies)) {
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		spin_unlock_irqrestore(&phba->hbalock, flags);
		return;
	}

	phba->last_ramp_down_time = jiffies;

	spin_unlock_irqrestore(&phba->hbalock, flags);

	spin_lock_irqsave(&phba->pport->work_port_lock, flags);
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	evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
	if (!evt_posted)
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		phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);

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	if (!evt_posted)
		lpfc_worker_wake_up(phba);
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	return;
}

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/**
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 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
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 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 * thread.This routine reduces queue depth for all scsi device on each vport
 * associated with @phba.
 **/
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void
lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
{
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	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
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	struct scsi_device *sdev;
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	unsigned long new_queue_depth;
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	unsigned long num_rsrc_err, num_cmd_success;
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	int i;
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	num_rsrc_err = atomic_read(&phba->num_rsrc_err);
	num_cmd_success = atomic_read(&phba->num_cmd_success);

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	/*
	 * The error and success command counters are global per
	 * driver instance.  If another handler has already
	 * operated on this error event, just exit.
	 */
	if (num_rsrc_err == 0)
		return;

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	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
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		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
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			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
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				new_queue_depth =
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					sdev->queue_depth * num_rsrc_err /
					(num_rsrc_err + num_cmd_success);
				if (!new_queue_depth)
					new_queue_depth = sdev->queue_depth - 1;
				else
					new_queue_depth = sdev->queue_depth -
								new_queue_depth;
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				scsi_change_queue_depth(sdev, new_queue_depth);
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			}
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		}
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	lpfc_destroy_vport_work_array(phba, vports);
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	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

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/**
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 * lpfc_scsi_dev_block - set all scsi hosts to block state
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 * @phba: Pointer to HBA context object.
 *
 * This function walks vport list and set each SCSI host to block state
 * by invoking fc_remote_port_delete() routine. This function is invoked
 * with EEH when device's PCI slot has been permanently disabled.
 **/
void
lpfc_scsi_dev_block(struct lpfc_hba *phba)
{
	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
	struct scsi_device *sdev;
	struct fc_rport *rport;
	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
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		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
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			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
				rport = starget_to_rport(scsi_target(sdev));
				fc_remote_port_delete(rport);
			}
		}
	lpfc_destroy_vport_work_array(phba, vports);
}

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/**
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 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
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 * @vport: The virtual port for which this call being executed.
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 * @num_to_allocate: The requested number of buffers to allocate.
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 *
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 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 * the scsi buffer contains all the necessary information needed to initiate
 * a SCSI I/O. The non-DMAable buffer region contains information to build
 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 * and the initial BPL. In addition to allocating memory, the FCP CMND and
 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
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 *
 * Return codes:
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 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
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 **/
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static int
lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
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{
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	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
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	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_bpl;
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	uint16_t iotag;
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	int bcnt, bpl_size;

	bpl_size = phba->cfg_sg_dma_buf_size -
		(sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));

	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
			 num_to_alloc, phba->cfg_sg_dma_buf_size,
			 (int)sizeof(struct fcp_cmnd),
			 (int)sizeof(struct fcp_rsp), bpl_size);
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	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
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		/*
		 * Get memory from the pci pool to map the virt space to pci
		 * bus space for an I/O.  The DMA buffer includes space for the
		 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
		 * necessary to support the sg_tablesize.
		 */
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		psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
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					GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}


		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
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			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
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				      psb->data, psb->dma_handle);
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			kfree(psb);
			break;
		}
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;

		psb->fcp_cmnd = psb->data;
		psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
		psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
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			sizeof(struct fcp_rsp);
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		/* Initialize local short-hand pointers. */
		bpl = psb->fcp_bpl;
		pdma_phys_fcp_cmd = psb->dma_handle;
		pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
		pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
			sizeof(struct fcp_rsp);

		/*
		 * The first two bdes are the FCP_CMD and FCP_RSP. The balance
		 * are sg list bdes.  Initialize the first two and leave the
		 * rest for queuecommand.
		 */
		bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
		bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
		bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
		bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);

		/* Setup the physical region for the FCP RSP */
		bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
		bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
		bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
		bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		if ((phba->sli_rev == 3) &&
				!(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
			/* fill in immediate fcp command BDE */
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
			iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
			iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
					unsli3.fcp_ext.icd);
			iocb->un.fcpi64.bdl.addrHigh = 0;
			iocb->ulpBdeCount = 0;
			iocb->ulpLe = 0;
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			/* fill in response BDE */
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			iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
							BUFF_TYPE_BDE_64;
			iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
				sizeof(struct fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrLow =
				putPaddrLow(pdma_phys_fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrHigh =
				putPaddrHigh(pdma_phys_fcp_rsp);
		} else {
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
			iocb->un.fcpi64.bdl.bdeSize =
					(2 * sizeof(struct ulp_bde64));
			iocb->un.fcpi64.bdl.addrLow =
					putPaddrLow(pdma_phys_bpl);
			iocb->un.fcpi64.bdl.addrHigh =
					putPaddrHigh(pdma_phys_bpl);
			iocb->ulpBdeCount = 1;
			iocb->ulpLe = 1;
		}
		iocb->ulpClass = CLASS3;
		psb->status = IOSTAT_SUCCESS;
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		/* Put it back into the SCSI buffer list */
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		psb->cur_iocbq.context1  = psb;
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		lpfc_release_scsi_buf_s3(phba, psb);
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	}
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	return bcnt;
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}

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/**
 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 * @vport: pointer to lpfc vport data structure.
 *
 * This routine is invoked by the vport cleanup for deletions and the cleanup
 * for an ndlp on removal.
 **/
void
lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
{
	struct lpfc_hba *phba = vport->phba;
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;

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	if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
		return;
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	spin_lock_irqsave(&phba->hbalock, iflag);
	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
	list_for_each_entry_safe(psb, next_psb,
				&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
		if (psb->rdata && psb->rdata->pnode
			&& psb->rdata->pnode->vport == vport)
			psb->rdata = NULL;
	}
	spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
	spin_unlock_irqrestore(&phba->hbalock, iflag);
}

542 543 544 545 546 547 548 549 550 551 552 553 554
/**
 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 * @phba: pointer to lpfc hba data structure.
 * @axri: pointer to the fcp xri abort wcqe structure.
 *
 * This routine is invoked by the worker thread to process a SLI4 fast-path
 * FCP aborted xri.
 **/
void
lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
			  struct sli4_wcqe_xri_aborted *axri)
{
	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
555
	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
556 557
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;
558 559
	struct lpfc_iocbq *iocbq;
	int i;
560 561
	struct lpfc_nodelist *ndlp;
	int rrq_empty = 0;
562
	struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
563

564 565
	if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
		return;
566 567
	spin_lock_irqsave(&phba->hbalock, iflag);
	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
568 569 570 571
	list_for_each_entry_safe(psb, next_psb,
		&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
		if (psb->cur_iocbq.sli4_xritag == xri) {
			list_del(&psb->list);
572
			psb->exch_busy = 0;
573
			psb->status = IOSTAT_SUCCESS;
574 575
			spin_unlock(
				&phba->sli4_hba.abts_scsi_buf_list_lock);
576 577 578 579 580
			if (psb->rdata && psb->rdata->pnode)
				ndlp = psb->rdata->pnode;
			else
				ndlp = NULL;

581
			rrq_empty = list_empty(&phba->active_rrq_list);
582
			spin_unlock_irqrestore(&phba->hbalock, iflag);
583
			if (ndlp) {
584 585
				lpfc_set_rrq_active(phba, ndlp,
					psb->cur_iocbq.sli4_lxritag, rxid, 1);
586 587
				lpfc_sli4_abts_err_handler(phba, ndlp, axri);
			}
588
			lpfc_release_scsi_buf_s4(phba, psb);
589 590
			if (rrq_empty)
				lpfc_worker_wake_up(phba);
591 592 593
			return;
		}
	}
594 595 596 597 598 599 600 601 602 603 604 605
	spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
	for (i = 1; i <= phba->sli.last_iotag; i++) {
		iocbq = phba->sli.iocbq_lookup[i];

		if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
			(iocbq->iocb_flag & LPFC_IO_LIBDFC))
			continue;
		if (iocbq->sli4_xritag != xri)
			continue;
		psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
		psb->exch_busy = 0;
		spin_unlock_irqrestore(&phba->hbalock, iflag);
606
		if (!list_empty(&pring->txq))
607
			lpfc_worker_wake_up(phba);
608 609 610 611
		return;

	}
	spin_unlock_irqrestore(&phba->hbalock, iflag);
612 613 614
}

/**
615
 * lpfc_sli4_post_scsi_sgl_list - Post blocks of scsi buffer sgls from a list
616
 * @phba: pointer to lpfc hba data structure.
617
 * @post_sblist: pointer to the scsi buffer list.
618
 *
619 620 621 622 623 624
 * This routine walks a list of scsi buffers that was passed in. It attempts
 * to construct blocks of scsi buffer sgls which contains contiguous xris and
 * uses the non-embedded SGL block post mailbox commands to post to the port.
 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 * embedded SGL post mailbox command for posting. The @post_sblist passed in
 * must be local list, thus no lock is needed when manipulate the list.
625
 *
626
 * Returns: 0 = failure, non-zero number of successfully posted buffers.
627
 **/
628
static int
629 630
lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
			     struct list_head *post_sblist, int sb_count)
631
{
632
	struct lpfc_scsi_buf *psb, *psb_next;
633
	int status, sgl_size;
634 635 636 637 638 639 640 641 642 643 644
	int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
	dma_addr_t pdma_phys_bpl1;
	int last_xritag = NO_XRI;
	LIST_HEAD(prep_sblist);
	LIST_HEAD(blck_sblist);
	LIST_HEAD(scsi_sblist);

	/* sanity check */
	if (sb_count <= 0)
		return -EINVAL;

645 646 647
	sgl_size = phba->cfg_sg_dma_buf_size -
		(sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));

648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
	list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
		list_del_init(&psb->list);
		block_cnt++;
		if ((last_xritag != NO_XRI) &&
		    (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
			/* a hole in xri block, form a sgl posting block */
			list_splice_init(&prep_sblist, &blck_sblist);
			post_cnt = block_cnt - 1;
			/* prepare list for next posting block */
			list_add_tail(&psb->list, &prep_sblist);
			block_cnt = 1;
		} else {
			/* prepare list for next posting block */
			list_add_tail(&psb->list, &prep_sblist);
			/* enough sgls for non-embed sgl mbox command */
			if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
				list_splice_init(&prep_sblist, &blck_sblist);
				post_cnt = block_cnt;
				block_cnt = 0;
667
			}
668 669 670
		}
		num_posting++;
		last_xritag = psb->cur_iocbq.sli4_xritag;
671

672 673 674 675 676 677 678 679
		/* end of repost sgl list condition for SCSI buffers */
		if (num_posting == sb_count) {
			if (post_cnt == 0) {
				/* last sgl posting block */
				list_splice_init(&prep_sblist, &blck_sblist);
				post_cnt = block_cnt;
			} else if (block_cnt == 1) {
				/* last single sgl with non-contiguous xri */
680
				if (sgl_size > SGL_PAGE_SIZE)
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
					pdma_phys_bpl1 = psb->dma_phys_bpl +
								SGL_PAGE_SIZE;
				else
					pdma_phys_bpl1 = 0;
				status = lpfc_sli4_post_sgl(phba,
						psb->dma_phys_bpl,
						pdma_phys_bpl1,
						psb->cur_iocbq.sli4_xritag);
				if (status) {
					/* failure, put on abort scsi list */
					psb->exch_busy = 1;
				} else {
					/* success, put on SCSI buffer list */
					psb->exch_busy = 0;
					psb->status = IOSTAT_SUCCESS;
					num_posted++;
				}
				/* success, put on SCSI buffer sgl list */
				list_add_tail(&psb->list, &scsi_sblist);
			}
		}
702

703 704
		/* continue until a nembed page worth of sgls */
		if (post_cnt == 0)
705
			continue;
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721

		/* post block of SCSI buffer list sgls */
		status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
						       post_cnt);

		/* don't reset xirtag due to hole in xri block */
		if (block_cnt == 0)
			last_xritag = NO_XRI;

		/* reset SCSI buffer post count for next round of posting */
		post_cnt = 0;

		/* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
		while (!list_empty(&blck_sblist)) {
			list_remove_head(&blck_sblist, psb,
					 struct lpfc_scsi_buf, list);
722
			if (status) {
723
				/* failure, put on abort scsi list */
724 725
				psb->exch_busy = 1;
			} else {
726
				/* success, put on SCSI buffer list */
727
				psb->exch_busy = 0;
728
				psb->status = IOSTAT_SUCCESS;
729
				num_posted++;
730
			}
731
			list_add_tail(&psb->list, &scsi_sblist);
732 733
		}
	}
734 735 736 737 738 739 740 741 742 743
	/* Push SCSI buffers with sgl posted to the availble list */
	while (!list_empty(&scsi_sblist)) {
		list_remove_head(&scsi_sblist, psb,
				 struct lpfc_scsi_buf, list);
		lpfc_release_scsi_buf_s4(phba, psb);
	}
	return num_posted;
}

/**
744
 * lpfc_sli4_repost_scsi_sgl_list - Repost all the allocated scsi buffer sgls
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine walks the list of scsi buffers that have been allocated and
 * repost them to the port by using SGL block post. This is needed after a
 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 *
 * Returns: 0 = success, non-zero failure.
 **/
int
lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
{
	LIST_HEAD(post_sblist);
	int num_posted, rc = 0;

	/* get all SCSI buffers need to repost to a local list */
762
	spin_lock_irq(&phba->scsi_buf_list_get_lock);
763
	spin_lock(&phba->scsi_buf_list_put_lock);
764 765
	list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
	list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
766
	spin_unlock(&phba->scsi_buf_list_put_lock);
767
	spin_unlock_irq(&phba->scsi_buf_list_get_lock);
768 769 770 771 772 773 774 775 776

	/* post the list of scsi buffer sgls to port if available */
	if (!list_empty(&post_sblist)) {
		num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
						phba->sli4_hba.scsi_xri_cnt);
		/* failed to post any scsi buffer, return error */
		if (num_posted == 0)
			rc = -EIO;
	}
777 778 779 780 781 782 783 784
	return rc;
}

/**
 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 * @vport: The virtual port for which this call being executed.
 * @num_to_allocate: The requested number of buffers to allocate.
 *
785
 * This routine allocates scsi buffers for device with SLI-4 interface spec,
786
 * the scsi buffer contains all the necessary information needed to initiate
787 788
 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 * them on a list, it post them to the port by using SGL block post.
789 790
 *
 * Return codes:
791
 *   int - number of scsi buffers that were allocated and posted.
792 793 794 795 796 797 798 799 800 801 802
 *   0 = failure, less than num_to_alloc is a partial failure.
 **/
static int
lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
{
	struct lpfc_hba *phba = vport->phba;
	struct lpfc_scsi_buf *psb;
	struct sli4_sge *sgl;
	IOCB_t *iocb;
	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
803
	dma_addr_t pdma_phys_bpl;
804
	uint16_t iotag, lxri = 0;
805
	int bcnt, num_posted, sgl_size;
806 807 808
	LIST_HEAD(prep_sblist);
	LIST_HEAD(post_sblist);
	LIST_HEAD(scsi_sblist);
809

810 811 812 813 814 815 816 817 818
	sgl_size = phba->cfg_sg_dma_buf_size -
		(sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));

	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
			 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
			 (int)sizeof(struct fcp_cmnd),
			 (int)sizeof(struct fcp_rsp));

819 820 821 822 823
	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
		/*
824 825 826 827
		 * Get memory from the pci pool to map the virt space to
		 * pci bus space for an I/O. The DMA buffer includes space
		 * for the struct fcp_cmnd, struct fcp_rsp and the number
		 * of bde's necessary to support the sg_tablesize.
828
		 */
829
		psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
830 831 832 833 834 835
						GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}

836 837 838 839 840 841
		/*
		 * 4K Page alignment is CRITICAL to BlockGuard, double check
		 * to be sure.
		 */
		if (phba->cfg_enable_bg  && (((unsigned long)(psb->data) &
		    (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
842
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
843 844 845 846 847
				      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}

848 849 850

		lxri = lpfc_sli4_next_xritag(phba);
		if (lxri == NO_XRI) {
851
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
852
				      psb->data, psb->dma_handle);
853 854 855 856
			kfree(psb);
			break;
		}

857 858 859
		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
860
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
861
				      psb->data, psb->dma_handle);
862
			kfree(psb);
863
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
864
					"3368 Failed to allocate IOTAG for"
865 866
					" XRI:0x%x\n", lxri);
			lpfc_sli4_free_xri(phba, lxri);
867 868
			break;
		}
869 870
		psb->cur_iocbq.sli4_lxritag = lxri;
		psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
871 872
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
		psb->fcp_bpl = psb->data;
873
		psb->fcp_cmnd = (psb->data + sgl_size);
874 875 876 877 878 879
		psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
					sizeof(struct fcp_cmnd));

		/* Initialize local short-hand pointers. */
		sgl = (struct sli4_sge *)psb->fcp_bpl;
		pdma_phys_bpl = psb->dma_handle;
880
		pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
881 882 883
		pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);

		/*
884 885 886
		 * The first two bdes are the FCP_CMD and FCP_RSP.
		 * The balance are sg list bdes. Initialize the
		 * first two and leave the rest for queuecommand.
887 888 889
		 */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
890
		sgl->word2 = le32_to_cpu(sgl->word2);
891 892
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
893
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
894 895 896 897 898
		sgl++;

		/* Setup the physical region for the FCP RSP */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
899
		sgl->word2 = le32_to_cpu(sgl->word2);
900 901
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
902
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
		/* setting the BLP size to 2 * sizeof BDE may not be correct.
		 * We are setting the bpl to point to out sgl. An sgl's
		 * entries are 16 bytes, a bpl entries are 12 bytes.
		 */
		iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
		iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
		iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
		iocb->ulpBdeCount = 1;
		iocb->ulpLe = 1;
		iocb->ulpClass = CLASS3;
921
		psb->cur_iocbq.context1 = psb;
922 923
		psb->dma_phys_bpl = pdma_phys_bpl;

924 925
		/* add the scsi buffer to a post list */
		list_add_tail(&psb->list, &post_sblist);
926
		spin_lock_irq(&phba->scsi_buf_list_get_lock);
927
		phba->sli4_hba.scsi_xri_cnt++;
928
		spin_unlock_irq(&phba->scsi_buf_list_get_lock);
929
	}
930
	lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP,
931 932 933 934 935 936 937 938 939 940 941
			"3021 Allocate %d out of %d requested new SCSI "
			"buffers\n", bcnt, num_to_alloc);

	/* post the list of scsi buffer sgls to port if available */
	if (!list_empty(&post_sblist))
		num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
							  &post_sblist, bcnt);
	else
		num_posted = 0;

	return num_posted;
942 943
}

944
/**
945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 * @vport: The virtual port for which this call being executed.
 * @num_to_allocate: The requested number of buffers to allocate.
 *
 * This routine wraps the actual SCSI buffer allocator function pointer from
 * the lpfc_hba struct.
 *
 * Return codes:
 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
 **/
static inline int
lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
{
	return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
}

/**
963
 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
964
 * @phba: The HBA for which this call is being executed.
965 966 967 968 969 970 971 972
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
973
static struct lpfc_scsi_buf*
974
lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
已提交
975
{
976
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
977
	struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
978
	unsigned long iflag = 0;
979

980
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
981 982 983
	list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
			 list);
	if (!lpfc_cmd) {
984
		spin_lock(&phba->scsi_buf_list_put_lock);
985 986 987 988 989
		list_splice(&phba->lpfc_scsi_buf_list_put,
			    &phba->lpfc_scsi_buf_list_get);
		INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
		list_remove_head(scsi_buf_list_get, lpfc_cmd,
				 struct lpfc_scsi_buf, list);
990
		spin_unlock(&phba->scsi_buf_list_put_lock);
991
	}
992
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
993 994
	return  lpfc_cmd;
}
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
/**
 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 * @phba: The HBA for which this call is being executed.
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
1009
	struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1010
	unsigned long iflag = 0;
1011 1012
	int found = 0;

1013
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1014 1015
	list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
				 &phba->lpfc_scsi_buf_list_get, list) {
1016
		if (lpfc_test_rrq_active(phba, ndlp,
1017
					 lpfc_cmd->cur_iocbq.sli4_lxritag))
1018 1019
			continue;
		list_del(&lpfc_cmd->list);
1020
		found = 1;
1021
		break;
1022
	}
1023
	if (!found) {
1024
		spin_lock(&phba->scsi_buf_list_put_lock);
1025 1026 1027
		list_splice(&phba->lpfc_scsi_buf_list_put,
			    &phba->lpfc_scsi_buf_list_get);
		INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1028
		spin_unlock(&phba->scsi_buf_list_put_lock);
1029 1030
		list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
					 &phba->lpfc_scsi_buf_list_get, list) {
1031 1032 1033 1034 1035 1036 1037 1038
			if (lpfc_test_rrq_active(
				phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
				continue;
			list_del(&lpfc_cmd->list);
			found = 1;
			break;
		}
	}
1039
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1040 1041
	if (!found)
		return NULL;
1042
	return  lpfc_cmd;
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
}
/**
 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 * @phba: The HBA for which this call is being executed.
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
	return  phba->lpfc_get_scsi_buf(phba, ndlp);
}
已提交
1060

1061
/**
1062
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1063 1064 1065 1066 1067 1068
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list.
 **/
1069
static void
1070
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1071
{
1072
	unsigned long iflag = 0;
已提交
1073

1074 1075 1076 1077 1078
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1079
	psb->pCmd = NULL;
1080
	psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1081 1082
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
	spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
已提交
1083 1084
}

1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
/**
 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
 * and cannot be reused for at least RA_TOV amount of time if it was
 * aborted.
 **/
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
	unsigned long iflag = 0;

1100 1101 1102 1103
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

1104
	if (psb->exch_busy) {
1105 1106 1107 1108 1109 1110 1111 1112 1113
		spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
		psb->pCmd = NULL;
		list_add_tail(&psb->list,
			&phba->sli4_hba.lpfc_abts_scsi_buf_list);
		spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
	} else {
		psb->pCmd = NULL;
1114
		psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1115 1116 1117
		spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
		list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
		spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1118 1119 1120
	}
}

1121
/**
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list.
 **/
static void
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{

	phba->lpfc_release_scsi_buf(phba, psb);
}

/**
 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1138 1139 1140 1141
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1142
 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1143
 * through sg elements and format the bde. This routine also initializes all
1144
 * IOCB fields which are dependent on scsi command request buffer.
1145 1146 1147 1148 1149
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
1150
static int
1151
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1152 1153 1154 1155 1156
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct scatterlist *sgel = NULL;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1157
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
已提交
1158
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1159
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1160
	dma_addr_t physaddr;
1161
	uint32_t num_bde = 0;
1162
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1163 1164 1165 1166 1167 1168 1169 1170

	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.  Start the lpfc command prep by
	 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
	 * data bde entry.
	 */
	bpl += 2;
1171
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1172 1173 1174 1175 1176 1177 1178
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */

1179 1180 1181 1182 1183
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1184
		lpfc_cmd->seg_cnt = nseg;
已提交
1185
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1186 1187
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1188
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1189
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1190
			       lpfc_cmd->seg_cnt);
1191
			lpfc_cmd->seg_cnt = 0;
1192
			scsi_dma_unmap(scsi_cmnd);
已提交
1193 1194 1195 1196 1197 1198 1199 1200
			return 1;
		}

		/*
		 * The driver established a maximum scatter-gather segment count
		 * during probe that limits the number of sg elements in any
		 * single scsi command.  Just run through the seg_cnt and format
		 * the bde's.
1201 1202 1203
		 * When using SLI-3 the driver will try to fit all the BDEs into
		 * the IOCB. If it can't then the BDEs get added to a BPL as it
		 * does for SLI-2 mode.
已提交
1204
		 */
1205
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1206
			physaddr = sg_dma_address(sgel);
1207
			if (phba->sli_rev == 3 &&
1208
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1209
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
			    nseg <= LPFC_EXT_DATA_BDE_COUNT) {
				data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
				data_bde->tus.f.bdeSize = sg_dma_len(sgel);
				data_bde->addrLow = putPaddrLow(physaddr);
				data_bde->addrHigh = putPaddrHigh(physaddr);
				data_bde++;
			} else {
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
				bpl->tus.f.bdeSize = sg_dma_len(sgel);
				bpl->tus.w = le32_to_cpu(bpl->tus.w);
				bpl->addrLow =
					le32_to_cpu(putPaddrLow(physaddr));
				bpl->addrHigh =
					le32_to_cpu(putPaddrHigh(physaddr));
				bpl++;
			}
已提交
1226
		}
1227
	}
已提交
1228 1229 1230

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1231 1232 1233
	 * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
	 * explicitly reinitialized and for SLI-3 the extended bde count is
	 * explicitly reinitialized since all iocb memory resources are reused.
已提交
1234
	 */
1235
	if (phba->sli_rev == 3 &&
1236 1237
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
		if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
			/*
			 * The extended IOCB format can only fit 3 BDE or a BPL.
			 * This I/O has more than 3 BDE so the 1st data bde will
			 * be a BPL that is filled in here.
			 */
			physaddr = lpfc_cmd->dma_handle;
			data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
			data_bde->tus.f.bdeSize = (num_bde *
						   sizeof(struct ulp_bde64));
			physaddr += (sizeof(struct fcp_cmnd) +
				     sizeof(struct fcp_rsp) +
				     (2 * sizeof(struct ulp_bde64)));
			data_bde->addrHigh = putPaddrHigh(physaddr);
			data_bde->addrLow = putPaddrLow(physaddr);
L
Lucas De Marchi 已提交
1253
			/* ebde count includes the response bde and data bpl */
1254 1255
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
L
Lucas De Marchi 已提交
1256
			/* ebde count includes the response bde and data bdes */
1257 1258 1259 1260 1261
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
1262
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1263
	}
1264
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1265 1266 1267 1268 1269

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1270
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1271 1272 1273
	return 0;
}

1274
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1275

1276
/* Return BG_ERR_INIT if error injection is detected by Initiator */
1277
#define BG_ERR_INIT	0x1
1278
/* Return BG_ERR_TGT if error injection is detected by Target */
1279
#define BG_ERR_TGT	0x2
1280
/* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1281
#define BG_ERR_SWAP	0x10
1282 1283 1284 1285
/**
 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
 * error injection
 **/
1286
#define BG_ERR_CHECK	0x20
1287 1288 1289 1290

/**
 * lpfc_bg_err_inject - Determine if we should inject an error
 * @phba: The Hba for which this call is being executed.
1291 1292 1293 1294 1295
 * @sc: The SCSI command to examine
 * @reftag: (out) BlockGuard reference tag for transmitted data
 * @apptag: (out) BlockGuard application tag for transmitted data
 * @new_guard (in) Value to replace CRC with if needed
 *
1296
 * Returns BG_ERR_* bit mask or 0 if request ignored
1297
 **/
1298 1299 1300 1301 1302
static int
lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
{
	struct scatterlist *sgpe; /* s/g prot entry */
1303
	struct lpfc_scsi_buf *lpfc_cmd = NULL;
1304
	struct scsi_dif_tuple *src = NULL;
1305 1306
	struct lpfc_nodelist *ndlp;
	struct lpfc_rport_data *rdata;
1307 1308 1309 1310 1311
	uint32_t op = scsi_get_prot_op(sc);
	uint32_t blksize;
	uint32_t numblks;
	sector_t lba;
	int rc = 0;
1312
	int blockoff = 0;
1313 1314 1315 1316

	if (op == SCSI_PROT_NORMAL)
		return 0;

1317
	sgpe = scsi_prot_sglist(sc);
1318
	lba = scsi_get_lba(sc);
1319 1320

	/* First check if we need to match the LBA */
1321 1322 1323 1324 1325 1326 1327 1328
	if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
		blksize = lpfc_cmd_blksize(sc);
		numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;

		/* Make sure we have the right LBA if one is specified */
		if ((phba->lpfc_injerr_lba < lba) ||
			(phba->lpfc_injerr_lba >= (lba + numblks)))
			return 0;
1329 1330 1331 1332 1333 1334 1335
		if (sgpe) {
			blockoff = phba->lpfc_injerr_lba - lba;
			numblks = sg_dma_len(sgpe) /
				sizeof(struct scsi_dif_tuple);
			if (numblks < blockoff)
				blockoff = numblks;
		}
1336 1337
	}

1338
	/* Next check if we need to match the remote NPortID or WWPN */
1339
	rdata = lpfc_rport_data_from_scsi_device(sc->device);
1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364
	if (rdata && rdata->pnode) {
		ndlp = rdata->pnode;

		/* Make sure we have the right NPortID if one is specified */
		if (phba->lpfc_injerr_nportid  &&
			(phba->lpfc_injerr_nportid != ndlp->nlp_DID))
			return 0;

		/*
		 * Make sure we have the right WWPN if one is specified.
		 * wwn[0] should be a non-zero NAA in a good WWPN.
		 */
		if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
			(memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
				sizeof(struct lpfc_name)) != 0))
			return 0;
	}

	/* Setup a ptr to the protection data if the SCSI host provides it */
	if (sgpe) {
		src = (struct scsi_dif_tuple *)sg_virt(sgpe);
		src += blockoff;
		lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
	}

1365 1366
	/* Should we change the Reference Tag */
	if (reftag) {
1367 1368 1369
		if (phba->lpfc_injerr_wref_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1370 1371 1372 1373 1374 1375 1376 1377
				if (src) {
					/*
					 * For WRITE_PASS, force the error
					 * to be sent on the wire. It should
					 * be detected by the Target.
					 * If blockoff != 0 error will be
					 * inserted in middle of the IO.
					 */
1378 1379 1380 1381 1382

					lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9076 BLKGRD: Injecting reftag error: "
					"write lba x%lx + x%x oldrefTag x%x\n",
					(unsigned long)lba, blockoff,
1383
					be32_to_cpu(src->ref_tag));
1384

1385
					/*
1386 1387
					 * Save the old ref_tag so we can
					 * restore it on completion.
1388
					 */
1389 1390 1391 1392 1393 1394 1395 1396 1397
					if (lpfc_cmd) {
						lpfc_cmd->prot_data_type =
							LPFC_INJERR_REFTAG;
						lpfc_cmd->prot_data_segment =
							src;
						lpfc_cmd->prot_data =
							src->ref_tag;
					}
					src->ref_tag = cpu_to_be32(0xDEADBEEF);
1398
					phba->lpfc_injerr_wref_cnt--;
1399 1400 1401 1402 1403 1404 1405
					if (phba->lpfc_injerr_wref_cnt == 0) {
						phba->lpfc_injerr_nportid = 0;
						phba->lpfc_injerr_lba =
							LPFC_INJERR_LBA_OFF;
						memset(&phba->lpfc_injerr_wwpn,
						  0, sizeof(struct lpfc_name));
					}
1406 1407
					rc = BG_ERR_TGT | BG_ERR_CHECK;

1408 1409 1410
					break;
				}
				/* Drop thru */
1411
			case SCSI_PROT_WRITE_INSERT:
1412
				/*
1413 1414 1415
				 * For WRITE_INSERT, force the error
				 * to be sent on the wire. It should be
				 * detected by the Target.
1416
				 */
1417
				/* DEADBEEF will be the reftag on the wire */
1418 1419
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1420 1421 1422 1423 1424 1425 1426
				if (phba->lpfc_injerr_wref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
					LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1427
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1428 1429

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1430
					"9078 BLKGRD: Injecting reftag error: "
1431 1432
					"write lba x%lx\n", (unsigned long)lba);
				break;
1433
			case SCSI_PROT_WRITE_STRIP:
1434
				/*
1435 1436 1437
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1438
				 */
1439 1440
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1441 1442 1443 1444 1445 1446 1447
				if (phba->lpfc_injerr_wref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1448
				rc = BG_ERR_INIT;
1449 1450

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1451
					"9077 BLKGRD: Injecting reftag error: "
1452
					"write lba x%lx\n", (unsigned long)lba);
1453
				break;
1454
			}
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
		}
		if (phba->lpfc_injerr_rref_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
1466 1467
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_rref_cnt--;
1468 1469 1470 1471 1472 1473 1474
				if (phba->lpfc_injerr_rref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1475
				rc = BG_ERR_INIT;
1476 1477

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1478
					"9079 BLKGRD: Injecting reftag error: "
1479
					"read lba x%lx\n", (unsigned long)lba);
1480
				break;
1481 1482 1483 1484 1485 1486
			}
		}
	}

	/* Should we change the Application Tag */
	if (apptag) {
1487 1488 1489
		if (phba->lpfc_injerr_wapp_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1490
				if (src) {
1491 1492 1493 1494 1495 1496 1497 1498
					/*
					 * For WRITE_PASS, force the error
					 * to be sent on the wire. It should
					 * be detected by the Target.
					 * If blockoff != 0 error will be
					 * inserted in middle of the IO.
					 */

1499 1500 1501 1502
					lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9080 BLKGRD: Injecting apptag error: "
					"write lba x%lx + x%x oldappTag x%x\n",
					(unsigned long)lba, blockoff,
1503
					be16_to_cpu(src->app_tag));
1504 1505

					/*
1506 1507
					 * Save the old app_tag so we can
					 * restore it on completion.
1508
					 */
1509 1510 1511 1512 1513 1514 1515 1516 1517
					if (lpfc_cmd) {
						lpfc_cmd->prot_data_type =
							LPFC_INJERR_APPTAG;
						lpfc_cmd->prot_data_segment =
							src;
						lpfc_cmd->prot_data =
							src->app_tag;
					}
					src->app_tag = cpu_to_be16(0xDEAD);
1518
					phba->lpfc_injerr_wapp_cnt--;
1519 1520 1521 1522 1523 1524 1525
					if (phba->lpfc_injerr_wapp_cnt == 0) {
						phba->lpfc_injerr_nportid = 0;
						phba->lpfc_injerr_lba =
							LPFC_INJERR_LBA_OFF;
						memset(&phba->lpfc_injerr_wwpn,
						  0, sizeof(struct lpfc_name));
					}
1526
					rc = BG_ERR_TGT | BG_ERR_CHECK;
1527 1528 1529
					break;
				}
				/* Drop thru */
1530
			case SCSI_PROT_WRITE_INSERT:
1531
				/*
1532 1533 1534
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1535
				 */
1536
				/* DEAD will be the apptag on the wire */
1537 1538
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1539 1540 1541 1542 1543 1544 1545
				if (phba->lpfc_injerr_wapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1546
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1547

1548
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1549
					"0813 BLKGRD: Injecting apptag error: "
1550 1551
					"write lba x%lx\n", (unsigned long)lba);
				break;
1552
			case SCSI_PROT_WRITE_STRIP:
1553
				/*
1554 1555 1556
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1557
				 */
1558 1559
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1560 1561 1562 1563 1564 1565 1566
				if (phba->lpfc_injerr_wapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1567
				rc = BG_ERR_INIT;
1568 1569

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1570
					"0812 BLKGRD: Injecting apptag error: "
1571
					"write lba x%lx\n", (unsigned long)lba);
1572
				break;
1573
			}
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
		}
		if (phba->lpfc_injerr_rapp_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
1585 1586
				*apptag = 0xDEAD;
				phba->lpfc_injerr_rapp_cnt--;
1587 1588 1589 1590 1591 1592 1593
				if (phba->lpfc_injerr_rapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1594
				rc = BG_ERR_INIT;
1595 1596

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1597
					"0814 BLKGRD: Injecting apptag error: "
1598
					"read lba x%lx\n", (unsigned long)lba);
1599
				break;
1600 1601 1602 1603
			}
		}
	}

1604

1605
	/* Should we change the Guard Tag */
1606 1607 1608 1609
	if (new_guard) {
		if (phba->lpfc_injerr_wgrd_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1610
				rc = BG_ERR_CHECK;
1611
				/* Drop thru */
1612 1613

			case SCSI_PROT_WRITE_INSERT:
1614
				/*
1615 1616 1617
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1618 1619
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1620 1621 1622 1623 1624 1625 1626
				if (phba->lpfc_injerr_wgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1627

1628
				rc |= BG_ERR_TGT | BG_ERR_SWAP;
1629
				/* Signals the caller to swap CRC->CSUM */
1630

1631
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1632
					"0817 BLKGRD: Injecting guard error: "
1633 1634
					"write lba x%lx\n", (unsigned long)lba);
				break;
1635
			case SCSI_PROT_WRITE_STRIP:
1636
				/*
1637 1638 1639
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1640 1641
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1642 1643 1644 1645 1646 1647 1648
				if (phba->lpfc_injerr_wgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1649

1650
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1651 1652 1653
				/* Signals the caller to swap CRC->CSUM */

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1654
					"0816 BLKGRD: Injecting guard error: "
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669
					"write lba x%lx\n", (unsigned long)lba);
				break;
			}
		}
		if (phba->lpfc_injerr_rgrd_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
				phba->lpfc_injerr_rgrd_cnt--;
1670 1671 1672 1673 1674 1675 1676
				if (phba->lpfc_injerr_rgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1677

1678
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1679 1680 1681 1682 1683 1684
				/* Signals the caller to swap CRC->CSUM */

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"0818 BLKGRD: Injecting guard error: "
					"read lba x%lx\n", (unsigned long)lba);
			}
1685 1686
		}
	}
1687

1688 1689 1690 1691
	return rc;
}
#endif

1692 1693 1694 1695
/**
 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
 * the specified SCSI command.
 * @phba: The Hba for which this call is being executed.
1696 1697 1698 1699 1700 1701
 * @sc: The SCSI command to examine
 * @txopt: (out) BlockGuard operation for transmitted data
 * @rxopt: (out) BlockGuard operation for received data
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
1702
 **/
1703
static int
1704 1705
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1706
{
1707
	uint8_t ret = 0;
1708

1709
	if (lpfc_cmd_guard_csum(sc)) {
1710 1711 1712
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1713
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1714
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1715 1716 1717 1718
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1719
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1720
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1721 1722
			break;

1723 1724
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1725
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1726
			*txop = BG_OP_IN_CSUM_OUT_CRC;
1727 1728 1729 1730
			break;

		case SCSI_PROT_NORMAL:
		default:
1731
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1732 1733
				"9063 BLKGRD: Bad op/guard:%d/IP combination\n",
					scsi_get_prot_op(sc));
1734
			ret = 1;
1735 1736 1737
			break;

		}
J
James Smart 已提交
1738
	} else {
1739 1740 1741
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1742
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1743
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1744 1745 1746 1747
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1748
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1749
			*txop = BG_OP_IN_CRC_OUT_CRC;
1750 1751 1752 1753
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
J
James Smart 已提交
1754
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1755
			*txop = BG_OP_IN_CRC_OUT_NODIF;
J
James Smart 已提交
1756 1757
			break;

1758 1759
		case SCSI_PROT_NORMAL:
		default:
1760
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1761 1762
				"9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
					scsi_get_prot_op(sc));
1763
			ret = 1;
1764 1765 1766 1767
			break;
		}
	}

1768
	return ret;
1769 1770
}

1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/**
 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
 * the specified SCSI command in order to force a guard tag error.
 * @phba: The Hba for which this call is being executed.
 * @sc: The SCSI command to examine
 * @txopt: (out) BlockGuard operation for transmitted data
 * @rxopt: (out) BlockGuard operation for received data
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
 **/
static int
lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
{
	uint8_t ret = 0;

1789
	if (lpfc_cmd_guard_csum(sc)) {
1790 1791 1792 1793
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1794
			*txop = BG_OP_IN_CRC_OUT_NODIF;
1795 1796 1797 1798 1799
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1800
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1801 1802 1803 1804
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1805
			*rxop = BG_OP_IN_CSUM_OUT_CRC;
1806
			*txop = BG_OP_IN_CRC_OUT_CSUM;
1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818
			break;

		case SCSI_PROT_NORMAL:
		default:
			break;

		}
	} else {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1819
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1820 1821 1822 1823
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1824
			*rxop = BG_OP_IN_CSUM_OUT_CSUM;
1825
			*txop = BG_OP_IN_CSUM_OUT_CSUM;
1826 1827 1828 1829 1830
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1831
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851
			break;

		case SCSI_PROT_NORMAL:
		default:
			break;
		}
	}

	return ret;
}
#endif

/**
 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 *
 * This function sets up BPL buffer list for protection groups of
1852 1853 1854 1855 1856 1857 1858 1859 1860
 * type LPFC_PG_TYPE_NO_DIF
 *
 * This is usually used when the HBA is instructed to generate
 * DIFs and insert them into data stream (or strip DIF from
 * incoming data stream)
 *
 * The buffer list consists of just one protection group described
 * below:
 *                                +-------------------------+
1861 1862 1863
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
1864 1865 1866 1867 1868 1869 1870 1871
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
1872 1873 1874
 *
 * Returns the number of BDEs added to the BPL.
 **/
1875 1876 1877 1878 1879
static int
lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct ulp_bde64 *bpl, int datasegcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
1880 1881
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1882
	dma_addr_t physaddr;
1883
	int i = 0, num_bde = 0, status;
1884
	int datadir = sc->sc_data_direction;
1885
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1886
	uint32_t rc;
1887
#endif
1888
	uint32_t checking = 1;
1889
	uint32_t reftag;
1890
	uint8_t txop, rxop;
1891

1892 1893
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1894 1895
		goto out;

1896
	/* extract some info from the scsi command for pde*/
1897
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1898

1899
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1900
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1901
	if (rc) {
1902
		if (rc & BG_ERR_SWAP)
1903
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1904
		if (rc & BG_ERR_CHECK)
1905 1906
			checking = 0;
	}
1907 1908
#endif

1909 1910 1911 1912 1913
	/* setup PDE5 with what we have */
	pde5 = (struct lpfc_pde5 *) bpl;
	memset(pde5, 0, sizeof(struct lpfc_pde5));
	bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);

1914
	/* Endianness conversion if necessary for PDE5 */
1915
	pde5->word0 = cpu_to_le32(pde5->word0);
J
James Smart 已提交
1916
	pde5->reftag = cpu_to_le32(reftag);
1917

1918 1919 1920 1921 1922 1923 1924 1925 1926 1927
	/* advance bpl and increment bde count */
	num_bde++;
	bpl++;
	pde6 = (struct lpfc_pde6 *) bpl;

	/* setup PDE6 with the rest of the info */
	memset(pde6, 0, sizeof(struct lpfc_pde6));
	bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
	bf_set(pde6_optx, pde6, txop);
	bf_set(pde6_oprx, pde6, rxop);
1928 1929 1930 1931 1932

	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
1933
	if (datadir == DMA_FROM_DEVICE) {
1934
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1935 1936 1937 1938
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

1939
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1940 1941 1942
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);
1943 1944
	}
	bf_set(pde6_ai, pde6, 1);
J
James Smart 已提交
1945 1946
	bf_set(pde6_ae, pde6, 0);
	bf_set(pde6_apptagval, pde6, 0);
1947

1948
	/* Endianness conversion if necessary for PDE6 */
1949 1950 1951 1952
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

1953
	/* advance bpl and increment bde count */
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975
	num_bde++;
	bpl++;

	/* assumption: caller has already run dma_map_sg on command data */
	scsi_for_each_sg(sc, sgde, datasegcnt, i) {
		physaddr = sg_dma_address(sgde);
		bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
		bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
		bpl->tus.f.bdeSize = sg_dma_len(sgde);
		if (datadir == DMA_TO_DEVICE)
			bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		else
			bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
		bpl->tus.w = le32_to_cpu(bpl->tus.w);
		bpl++;
		num_bde++;
	}

out:
	return num_bde;
}

1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
/**
 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 * @protcnt: number of segment of protection data that have been dma mapped
 *
 * This function sets up BPL buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF
1986 1987 1988 1989 1990 1991 1992 1993 1994
 *
 * This is usually used when DIFs are in their own buffers,
 * separate from the data. The HBA can then by instructed
 * to place the DIFs in the outgoing stream.  For read operations,
 * The HBA could extract the DIFs and place it in DIF buffers.
 *
 * The buffer list for this type consists of one or more of the
 * protection groups described below:
 *                                    +-------------------------+
1995
 *   start of first prot group  -->   |          PDE_5          |
1996
 *                                    +-------------------------+
1997 1998 1999
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
2000 2001 2002 2003 2004
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
2005
 *   start of new  prot group  -->    |          PDE_5          |
2006 2007 2008 2009 2010 2011
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
2012 2013 2014
 *
 * Returns the number of BDEs added to the BPL.
 **/
2015 2016 2017 2018 2019 2020
static int
lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct ulp_bde64 *bpl, int datacnt, int protcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct scatterlist *sgpe = NULL; /* s/g prot entry */
2021 2022
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
2023
	struct lpfc_pde7 *pde7 = NULL;
2024 2025
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
2026 2027
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2028 2029
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
2030
	int status;
2031 2032 2033
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
2034
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2035
	uint32_t rc;
2036
#endif
2037
	uint32_t checking = 1;
2038
	uint32_t reftag;
2039
	uint8_t txop, rxop;
2040 2041 2042 2043 2044 2045 2046
	int num_bde = 0;

	sgpe = scsi_prot_sglist(sc);
	sgde = scsi_sglist(sc);

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
				"9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
				sgpe, sgde);
		return 0;
	}

	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
		goto out;

	/* extract some info from the scsi command */
	blksize = lpfc_cmd_blksize(sc);
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2061
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2062
	if (rc) {
2063
		if (rc & BG_ERR_SWAP)
2064
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2065
		if (rc & BG_ERR_CHECK)
2066 2067 2068 2069 2070 2071
			checking = 0;
	}
#endif

	split_offset = 0;
	do {
2072 2073 2074 2075
		/* Check to see if we ran out of space */
		if (num_bde >= (phba->cfg_total_seg_cnt - 2))
			return num_bde + 3;

2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094
		/* setup PDE5 with what we have */
		pde5 = (struct lpfc_pde5 *) bpl;
		memset(pde5, 0, sizeof(struct lpfc_pde5));
		bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);

		/* Endianness conversion if necessary for PDE5 */
		pde5->word0 = cpu_to_le32(pde5->word0);
		pde5->reftag = cpu_to_le32(reftag);

		/* advance bpl and increment bde count */
		num_bde++;
		bpl++;
		pde6 = (struct lpfc_pde6 *) bpl;

		/* setup PDE6 with the rest of the info */
		memset(pde6, 0, sizeof(struct lpfc_pde6));
		bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
		bf_set(pde6_optx, pde6, txop);
		bf_set(pde6_oprx, pde6, rxop);
2095

2096
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2097 2098 2099 2100
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

2101
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2102 2103 2104 2105
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);

2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152
		bf_set(pde6_ai, pde6, 1);
		bf_set(pde6_ae, pde6, 0);
		bf_set(pde6_apptagval, pde6, 0);

		/* Endianness conversion if necessary for PDE6 */
		pde6->word0 = cpu_to_le32(pde6->word0);
		pde6->word1 = cpu_to_le32(pde6->word1);
		pde6->word2 = cpu_to_le32(pde6->word2);

		/* advance bpl and increment bde count */
		num_bde++;
		bpl++;

		/* setup the first BDE that points to protection buffer */
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;

		/* must be integer multiple of the DIF block length */
		BUG_ON(protgroup_len % 8);

		pde7 = (struct lpfc_pde7 *) bpl;
		memset(pde7, 0, sizeof(struct lpfc_pde7));
		bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);

		pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
		pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));

		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

		/* check if this pde is crossing the 4K boundary; if so split */
		if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
			protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
			protgrp_bytes = protgrp_blks * blksize;
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}

		num_bde++;

		/* setup BDE's for data blocks associated with DIF data */
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
2153 2154 2155 2156
			/* Check to see if we ran out of space */
			if (num_bde >= phba->cfg_total_seg_cnt)
				return num_bde + 1;

2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269
			if (!sgde) {
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9065 BLKGRD:%s Invalid data segment\n",
						__func__);
				return 0;
			}
			bpl++;
			dataphysaddr = sg_dma_address(sgde) + split_offset;
			bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
			bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));

			remainder = sg_dma_len(sgde) - split_offset;

			if ((subtotal + remainder) <= protgrp_bytes) {
				/* we can use this whole buffer */
				bpl->tus.f.bdeSize = remainder;
				split_offset = 0;

				if ((subtotal + remainder) == protgrp_bytes)
					pgdone = 1;
			} else {
				/* must split this buffer with next prot grp */
				bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
				split_offset += bpl->tus.f.bdeSize;
			}

			subtotal += bpl->tus.f.bdeSize;

			if (datadir == DMA_TO_DEVICE)
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
			else
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
			bpl->tus.w = le32_to_cpu(bpl->tus.w);

			num_bde++;
			curr_data++;

			if (split_offset)
				break;

			/* Move to the next s/g segment if possible */
			sgde = sg_next(sgde);

		}

		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
			bpl++;
			continue;
		}

		/* are we done ? */
		if (curr_prot == protcnt) {
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);
			bpl++;

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9054 BLKGRD: bug in %s\n", __func__);
		}

	} while (!alldone);
out:

	return num_bde;
}

/**
 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @sgl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 *
 * This function sets up SGL buffer list for protection groups of
 * type LPFC_PG_TYPE_NO_DIF
 *
 * This is usually used when the HBA is instructed to generate
 * DIFs and insert them into data stream (or strip DIF from
 * incoming data stream)
 *
 * The buffer list consists of just one protection group described
 * below:
 *                                +-------------------------+
 *   start of prot group  -->     |         DI_SEED         |
 *                                +-------------------------+
 *                                |         Data SGE        |
 *                                +-------------------------+
 *                                |more Data SGE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
 *
 * Returns the number of SGEs added to the SGL.
 **/
static int
lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct sli4_sge *sgl, int datasegcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct sli4_sge_diseed *diseed = NULL;
	dma_addr_t physaddr;
	int i = 0, num_sge = 0, status;
	uint32_t reftag;
	uint8_t txop, rxop;
2270
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2271
	uint32_t rc;
2272
#endif
2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284
	uint32_t checking = 1;
	uint32_t dma_len;
	uint32_t dma_offset = 0;

	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
		goto out;

	/* extract some info from the scsi command for pde*/
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2285
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2286
	if (rc) {
2287
		if (rc & BG_ERR_SWAP)
2288
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2289
		if (rc & BG_ERR_CHECK)
2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
			checking = 0;
	}
#endif

	/* setup DISEED with what we have */
	diseed = (struct sli4_sge_diseed *) sgl;
	memset(diseed, 0, sizeof(struct sli4_sge_diseed));
	bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);

	/* Endianness conversion if necessary */
	diseed->ref_tag = cpu_to_le32(reftag);
	diseed->ref_tag_tran = diseed->ref_tag;

2303 2304 2305 2306 2307
	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
	if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2308
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2309 2310 2311 2312
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);

2313
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2314 2315 2316 2317 2318
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
	}

2319 2320 2321
	/* setup DISEED with the rest of the info */
	bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
	bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2322

2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413
	bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
	bf_set(lpfc_sli4_sge_dif_me, diseed, 0);

	/* Endianness conversion if necessary for DISEED */
	diseed->word2 = cpu_to_le32(diseed->word2);
	diseed->word3 = cpu_to_le32(diseed->word3);

	/* advance bpl and increment sge count */
	num_sge++;
	sgl++;

	/* assumption: caller has already run dma_map_sg on command data */
	scsi_for_each_sg(sc, sgde, datasegcnt, i) {
		physaddr = sg_dma_address(sgde);
		dma_len = sg_dma_len(sgde);
		sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
		if ((i + 1) == datasegcnt)
			bf_set(lpfc_sli4_sge_last, sgl, 1);
		else
			bf_set(lpfc_sli4_sge_last, sgl, 0);
		bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);

		sgl->sge_len = cpu_to_le32(dma_len);
		dma_offset += dma_len;

		sgl++;
		num_sge++;
	}

out:
	return num_sge;
}

/**
 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @sgl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 * @protcnt: number of segment of protection data that have been dma mapped
 *
 * This function sets up SGL buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF
 *
 * This is usually used when DIFs are in their own buffers,
 * separate from the data. The HBA can then by instructed
 * to place the DIFs in the outgoing stream.  For read operations,
 * The HBA could extract the DIFs and place it in DIF buffers.
 *
 * The buffer list for this type consists of one or more of the
 * protection groups described below:
 *                                    +-------------------------+
 *   start of first prot group  -->   |         DISEED          |
 *                                    +-------------------------+
 *                                    |      DIF (Prot SGE)     |
 *                                    +-------------------------+
 *                                    |        Data SGE         |
 *                                    +-------------------------+
 *                                    |more Data SGE's ... (opt)|
 *                                    +-------------------------+
 *   start of new  prot group  -->    |         DISEED          |
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
 *
 * Returns the number of SGEs added to the SGL.
 **/
static int
lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct sli4_sge *sgl, int datacnt, int protcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct scatterlist *sgpe = NULL; /* s/g prot entry */
	struct sli4_sge_diseed *diseed = NULL;
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
	int status;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
	uint32_t reftag;
	uint8_t txop, rxop;
	uint32_t dma_len;
2414
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2415
	uint32_t rc;
2416
#endif
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426
	uint32_t checking = 1;
	uint32_t dma_offset = 0;
	int num_sge = 0;

	sgpe = scsi_prot_sglist(sc);
	sgde = scsi_sglist(sc);

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2427 2428 2429 2430
				sgpe, sgde);
		return 0;
	}

2431 2432
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
2433 2434
		goto out;

2435
	/* extract some info from the scsi command */
2436
	blksize = lpfc_cmd_blksize(sc);
2437
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2438

2439
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2440
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2441
	if (rc) {
2442
		if (rc & BG_ERR_SWAP)
2443
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2444
		if (rc & BG_ERR_CHECK)
2445 2446
			checking = 0;
	}
2447 2448
#endif

2449 2450
	split_offset = 0;
	do {
2451 2452 2453 2454
		/* Check to see if we ran out of space */
		if (num_sge >= (phba->cfg_total_seg_cnt - 2))
			return num_sge + 3;

2455 2456 2457 2458 2459 2460 2461 2462 2463
		/* setup DISEED with what we have */
		diseed = (struct sli4_sge_diseed *) sgl;
		memset(diseed, 0, sizeof(struct sli4_sge_diseed));
		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);

		/* Endianness conversion if necessary */
		diseed->ref_tag = cpu_to_le32(reftag);
		diseed->ref_tag_tran = diseed->ref_tag;

2464
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);

		} else {
			bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
			/*
			 * When in this mode, the hardware will replace
			 * the guard tag from the host with a
			 * newly generated good CRC for the wire.
			 * Switch to raw mode here to avoid this
			 * behavior. What the host sends gets put on the wire.
			 */
			if (txop == BG_OP_IN_CRC_OUT_CRC) {
				txop = BG_OP_RAW_MODE;
				rxop = BG_OP_RAW_MODE;
			}
		}


2483
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2484 2485 2486 2487
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);

2488 2489 2490
		/* setup DISEED with the rest of the info */
		bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
		bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2491

2492 2493 2494 2495 2496 2497 2498 2499 2500 2501
		bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
		bf_set(lpfc_sli4_sge_dif_me, diseed, 0);

		/* Endianness conversion if necessary for DISEED */
		diseed->word2 = cpu_to_le32(diseed->word2);
		diseed->word3 = cpu_to_le32(diseed->word3);

		/* advance sgl and increment bde count */
		num_sge++;
		sgl++;
2502 2503

		/* setup the first BDE that points to protection buffer */
2504 2505
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2506 2507 2508 2509

		/* must be integer multiple of the DIF block length */
		BUG_ON(protgroup_len % 8);

2510 2511 2512 2513 2514 2515
		/* Now setup DIF SGE */
		sgl->word2 = 0;
		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
		sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
		sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
		sgl->word2 = cpu_to_le32(sgl->word2);
2516

2517 2518 2519
		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

2520 2521 2522
		/* check if DIF SGE is crossing the 4K boundary; if so split */
		if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
			protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2523 2524
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
J
James Smart 已提交
2525
			protgrp_bytes = protgrp_blks * blksize;
2526 2527 2528 2529
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}
2530

2531
		num_sge++;
2532

2533
		/* setup SGE's for data blocks associated with DIF data */
2534 2535 2536
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
2537 2538 2539 2540
			/* Check to see if we ran out of space */
			if (num_sge >= phba->cfg_total_seg_cnt)
				return num_sge + 1;

2541
			if (!sgde) {
2542
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2543
					"9086 BLKGRD:%s Invalid data segment\n",
2544 2545 2546
						__func__);
				return 0;
			}
2547
			sgl++;
2548 2549 2550 2551 2552 2553
			dataphysaddr = sg_dma_address(sgde) + split_offset;

			remainder = sg_dma_len(sgde) - split_offset;

			if ((subtotal + remainder) <= protgrp_bytes) {
				/* we can use this whole buffer */
2554
				dma_len = remainder;
2555 2556 2557 2558 2559 2560
				split_offset = 0;

				if ((subtotal + remainder) == protgrp_bytes)
					pgdone = 1;
			} else {
				/* must split this buffer with next prot grp */
2561 2562
				dma_len = protgrp_bytes - subtotal;
				split_offset += dma_len;
2563 2564
			}

2565
			subtotal += dma_len;
2566

2567 2568 2569 2570 2571
			sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
			bf_set(lpfc_sli4_sge_last, sgl, 0);
			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2572

2573 2574 2575 2576
			sgl->sge_len = cpu_to_le32(dma_len);
			dma_offset += dma_len;

			num_sge++;
2577 2578 2579 2580 2581 2582 2583 2584 2585
			curr_data++;

			if (split_offset)
				break;

			/* Move to the next s/g segment if possible */
			sgde = sg_next(sgde);
		}

2586 2587 2588
		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
2589
			sgl++;
2590 2591 2592
			continue;
		}

2593 2594
		/* are we done ? */
		if (curr_prot == protcnt) {
2595
			bf_set(lpfc_sli4_sge_last, sgl, 1);
2596 2597 2598 2599
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);
2600
			sgl++;
2601 2602 2603 2604 2605

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
2606
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2607
				"9085 BLKGRD: bug in %s\n", __func__);
2608 2609 2610
		}

	} while (!alldone);
2611

2612 2613
out:

2614
	return num_sge;
2615
}
2616

2617 2618 2619 2620 2621
/**
 * lpfc_prot_group_type - Get prtotection group type of SCSI command
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 *
2622 2623 2624
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
2625 2626 2627
 * Returns: Protection group type (with or without DIF)
 *
 **/
2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
{
	int ret = LPFC_PG_TYPE_INVALID;
	unsigned char op = scsi_get_prot_op(sc);

	switch (op) {
	case SCSI_PROT_READ_STRIP:
	case SCSI_PROT_WRITE_INSERT:
		ret = LPFC_PG_TYPE_NO_DIF;
		break;
	case SCSI_PROT_READ_INSERT:
	case SCSI_PROT_WRITE_STRIP:
	case SCSI_PROT_READ_PASS:
	case SCSI_PROT_WRITE_PASS:
		ret = LPFC_PG_TYPE_DIF_BUF;
		break;
	default:
2646 2647 2648 2649
		if (phba)
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9021 Unsupported protection op:%d\n",
					op);
2650 2651 2652 2653 2654
		break;
	}
	return ret;
}

2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675
/**
 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be adjusted.
 *
 * Adjust the data length to account for how much data
 * is actually on the wire.
 *
 * returns the adjusted data length
 **/
static int
lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
		       struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *sc = lpfc_cmd->pCmd;
	int fcpdl;

	fcpdl = scsi_bufflen(sc);

	/* Check if there is protection data on the wire */
	if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2676
		/* Read check for protection data */
2677 2678 2679 2680
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
			return fcpdl;

	} else {
2681
		/* Write check for protection data */
2682 2683 2684 2685 2686 2687
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
			return fcpdl;
	}

	/*
	 * If we are in DIF Type 1 mode every data block has a 8 byte
2688 2689
	 * DIF (trailer) attached to it. Must ajust FCP data length
	 * to account for the protection data.
2690
	 */
2691
	fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2692 2693 2694 2695

	return fcpdl;
}

2696 2697 2698 2699 2700
/**
 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
 *
2701 2702 2703
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
 * two functions eventually, but for now, it's here
2704
 **/
2705
static int
2706
lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2707 2708 2709 2710 2711 2712 2713 2714 2715
		struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	uint32_t num_bde = 0;
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
2716
	int fcpdl;
2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736

	/*
	 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
	 *  fcp_rsp regions to the first data bde entry
	 */
	bpl += 2;
	if (scsi_sg_count(scsi_cmnd)) {
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */
		datasegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_sglist(scsi_cmnd),
					scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!datasegcnt))
			return 1;

		lpfc_cmd->seg_cnt = datasegcnt;
2737 2738 2739 2740

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
2741 2742 2743 2744 2745

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
2746 2747 2748 2749 2750

			/* Here we need to add a PDE5 and PDE6 to the count */
			if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
				goto err;

2751 2752
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
2753
			/* we should have 2 or more entries in buffer list */
2754 2755 2756
			if (num_bde < 2)
				goto err;
			break;
2757 2758

		case LPFC_PG_TYPE_DIF_BUF:
2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772
			/*
			 * This type indicates that protection buffers are
			 * passed to the driver, so that needs to be prepared
			 * for DMA
			 */
			protsegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_prot_sglist(scsi_cmnd),
					scsi_prot_sg_count(scsi_cmnd), datadir);
			if (unlikely(!protsegcnt)) {
				scsi_dma_unmap(scsi_cmnd);
				return 1;
			}

			lpfc_cmd->prot_seg_cnt = protsegcnt;
2773 2774 2775 2776 2777 2778 2779 2780

			/*
			 * There is a minimun of 4 BPLs used for every
			 * protection data segment.
			 */
			if ((lpfc_cmd->prot_seg_cnt * 4) >
			    (phba->cfg_total_seg_cnt - 2))
				goto err;
2781 2782 2783

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
2784
			/* we should have 3 or more entries in buffer list */
2785 2786
			if ((num_bde < 3) ||
			    (num_bde > phba->cfg_total_seg_cnt))
2787 2788
				goto err;
			break;
2789

2790 2791
		case LPFC_PG_TYPE_INVALID:
		default:
2792 2793 2794
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9022 Unexpected protection group %i\n",
					prot_group_type);
			return 1;
		}
	}

	/*
	 * Finish initializing those IOCB fields that are dependent on the
	 * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
	 * reinitialized since all iocb memory resources are used many times
	 * for transmit, receive, and continuation bpl's.
	 */
	iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
	iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
	iocb_cmd->ulpBdeCount = 1;
	iocb_cmd->ulpLe = 1;

2813
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2814 2815 2816 2817 2818 2819 2820 2821
	fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
	iocb_cmd->un.fcpi.fcpi_parm = fcpdl;

已提交
2822
	return 0;
2823
err:
2824 2825 2826 2827 2828 2829 2830
	if (lpfc_cmd->seg_cnt)
		scsi_dma_unmap(scsi_cmnd);
	if (lpfc_cmd->prot_seg_cnt)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
			     scsi_prot_sg_count(scsi_cmnd),
			     scsi_cmnd->sc_data_direction);

2831
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2832 2833 2834 2835
			"9023 Cannot setup S/G List for HBA"
			"IO segs %d/%d BPL %d SCSI %d: %d %d\n",
			lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
			phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2836
			prot_group_type, num_bde);
2837 2838 2839

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
2840 2841 2842
	return 1;
}

2843 2844 2845 2846 2847
/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CRC algorithmn
 * using crc_t10dif.
 */
2848
static uint16_t
2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
lpfc_bg_crc(uint8_t *data, int count)
{
	uint16_t crc = 0;
	uint16_t x;

	crc = crc_t10dif(data, count);
	x = cpu_to_be16(crc);
	return x;
}

/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CSUM algorithmn
 * using ip_compute_csum.
 */
2864
static uint16_t
2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876
lpfc_bg_csum(uint8_t *data, int count)
{
	uint16_t ret;

	ret = ip_compute_csum(data, count);
	return ret;
}

/*
 * This function examines the protection data to try to determine
 * what type of T10-DIF error occurred.
 */
2877
static void
2878 2879 2880 2881 2882 2883 2884
lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scatterlist *sgpe; /* s/g prot entry */
	struct scatterlist *sgde; /* s/g data entry */
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	struct scsi_dif_tuple *src = NULL;
	uint8_t *data_src = NULL;
2885
	uint16_t guard_tag;
2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926
	uint16_t start_app_tag, app_tag;
	uint32_t start_ref_tag, ref_tag;
	int prot, protsegcnt;
	int err_type, len, data_len;
	int chk_ref, chk_app, chk_guard;
	uint16_t sum;
	unsigned blksize;

	err_type = BGS_GUARD_ERR_MASK;
	sum = 0;
	guard_tag = 0;

	/* First check to see if there is protection data to examine */
	prot = scsi_get_prot_op(cmd);
	if ((prot == SCSI_PROT_READ_STRIP) ||
	    (prot == SCSI_PROT_WRITE_INSERT) ||
	    (prot == SCSI_PROT_NORMAL))
		goto out;

	/* Currently the driver just supports ref_tag and guard_tag checking */
	chk_ref = 1;
	chk_app = 0;
	chk_guard = 0;

	/* Setup a ptr to the protection data provided by the SCSI host */
	sgpe = scsi_prot_sglist(cmd);
	protsegcnt = lpfc_cmd->prot_seg_cnt;

	if (sgpe && protsegcnt) {

		/*
		 * We will only try to verify guard tag if the segment
		 * data length is a multiple of the blksize.
		 */
		sgde = scsi_sglist(cmd);
		blksize = lpfc_cmd_blksize(cmd);
		data_src = (uint8_t *)sg_virt(sgde);
		data_len = sgde->length;
		if ((data_len & (blksize - 1)) == 0)
			chk_guard = 1;

2927
		src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2928
		start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2929 2930 2931 2932 2933 2934 2935 2936 2937
		start_app_tag = src->app_tag;
		len = sgpe->length;
		while (src && protsegcnt) {
			while (len) {

				/*
				 * First check to see if a protection data
				 * check is valid
				 */
2938 2939
				if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
				    (src->app_tag == T10_PI_APP_ESCAPE)) {
2940 2941 2942 2943
					start_ref_tag++;
					goto skipit;
				}

2944
				/* First Guard Tag checking */
2945 2946
				if (chk_guard) {
					guard_tag = src->guard_tag;
2947
					if (lpfc_cmd_guard_csum(cmd))
2948 2949 2950 2951 2952 2953 2954 2955 2956 2957
						sum = lpfc_bg_csum(data_src,
								   blksize);
					else
						sum = lpfc_bg_crc(data_src,
								  blksize);
					if ((guard_tag != sum)) {
						err_type = BGS_GUARD_ERR_MASK;
						goto out;
					}
				}
2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972

				/* Reference Tag checking */
				ref_tag = be32_to_cpu(src->ref_tag);
				if (chk_ref && (ref_tag != start_ref_tag)) {
					err_type = BGS_REFTAG_ERR_MASK;
					goto out;
				}
				start_ref_tag++;

				/* App Tag checking */
				app_tag = src->app_tag;
				if (chk_app && (app_tag != start_app_tag)) {
					err_type = BGS_APPTAG_ERR_MASK;
					goto out;
				}
2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049
skipit:
				len -= sizeof(struct scsi_dif_tuple);
				if (len < 0)
					len = 0;
				src++;

				data_src += blksize;
				data_len -= blksize;

				/*
				 * Are we at the end of the Data segment?
				 * The data segment is only used for Guard
				 * tag checking.
				 */
				if (chk_guard && (data_len == 0)) {
					chk_guard = 0;
					sgde = sg_next(sgde);
					if (!sgde)
						goto out;

					data_src = (uint8_t *)sg_virt(sgde);
					data_len = sgde->length;
					if ((data_len & (blksize - 1)) == 0)
						chk_guard = 1;
				}
			}

			/* Goto the next Protection data segment */
			sgpe = sg_next(sgpe);
			if (sgpe) {
				src = (struct scsi_dif_tuple *)sg_virt(sgpe);
				len = sgpe->length;
			} else {
				src = NULL;
			}
			protsegcnt--;
		}
	}
out:
	if (err_type == BGS_GUARD_ERR_MASK) {
		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
					0x10, 0x1);
		cmd->result = DRIVER_SENSE << 24
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
				(unsigned long)scsi_get_lba(cmd),
				sum, guard_tag);

	} else if (err_type == BGS_REFTAG_ERR_MASK) {
		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
					0x10, 0x3);
		cmd->result = DRIVER_SENSE << 24
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
				(unsigned long)scsi_get_lba(cmd),
				ref_tag, start_ref_tag);

	} else if (err_type == BGS_APPTAG_ERR_MASK) {
		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
					0x10, 0x2);
		cmd->result = DRIVER_SENSE << 24
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
				(unsigned long)scsi_get_lba(cmd),
				app_tag, start_app_tag);
	}
}


3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074
/*
 * This function checks for BlockGuard errors detected by
 * the HBA.  In case of errors, the ASC/ASCQ fields in the
 * sense buffer will be set accordingly, paired with
 * ILLEGAL_REQUEST to signal to the kernel that the HBA
 * detected corruption.
 *
 * Returns:
 *  0 - No error found
 *  1 - BlockGuard error found
 * -1 - Internal error (bad profile, ...etc)
 */
static int
lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
			struct lpfc_iocbq *pIocbOut)
{
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
	int ret = 0;
	uint32_t bghm = bgf->bghm;
	uint32_t bgstat = bgf->bgstat;
	uint64_t failing_sector = 0;

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
3075 3076
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
3077
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3078
		lpfc_debug_save_data(phba, cmd);
3079 3080 3081 3082

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
3083 3084 3085 3086
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
				"Saving DIF for %u blocks to debugfs\n",
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
			lpfc_debug_save_dif(phba, cmd);
3087 3088 3089 3090 3091 3092 3093 3094
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
3095 3096 3097 3098 3099 3100
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9072 BLKGRD: Invalid BG Profile in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3101 3102 3103 3104 3105 3106
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
3107 3108 3109 3110 3111 3112
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9073 BLKGRD: Invalid BG PDIF Block in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3113 3114 3115 3116 3117 3118 3119 3120 3121
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_guard_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x1);
M
Martin K. Petersen 已提交
3122
		cmd->result = DRIVER_SENSE << 24
3123 3124
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
3125 3126 3127 3128 3129 3130
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9055 BLKGRD: Guard Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3131 3132 3133 3134 3135 3136 3137
	}

	if (lpfc_bgs_get_reftag_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x3);
M
Martin K. Petersen 已提交
3138
		cmd->result = DRIVER_SENSE << 24
3139 3140 3141
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
3142 3143 3144 3145 3146 3147
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9056 BLKGRD: Ref Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3148 3149 3150 3151 3152 3153 3154
	}

	if (lpfc_bgs_get_apptag_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x2);
M
Martin K. Petersen 已提交
3155
		cmd->result = DRIVER_SENSE << 24
3156 3157 3158
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
3159 3160 3161 3162 3163 3164
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9061 BLKGRD: App Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3165 3166 3167 3168 3169
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
J
James Smart 已提交
3170 3171 3172
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
3173
		 */
J
James Smart 已提交
3174 3175 3176 3177
		cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
		cmd->sense_buffer[8] = 0;     /* Information descriptor type */
		cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
		cmd->sense_buffer[10] = 0x80; /* Validity bit */
3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192

		/* bghm is a "on the wire" FC frame based count */
		switch (scsi_get_prot_op(cmd)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			bghm /= cmd->device->sector_size;
			break;
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
			bghm /= (cmd->device->sector_size +
				sizeof(struct scsi_dif_tuple));
			break;
		}
3193 3194 3195 3196

		failing_sector = scsi_get_lba(cmd);
		failing_sector += bghm;

J
James Smart 已提交
3197 3198
		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3199 3200 3201 3202
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
3203 3204 3205 3206 3207 3208 3209 3210 3211
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9057 BLKGRD: Unknown error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);

		/* Calcuate what type of error it was */
		lpfc_calc_bg_err(phba, lpfc_cmd);
3212 3213 3214
	}
out:
	return ret;
已提交
3215 3216
}

3217 3218 3219 3220 3221 3222 3223 3224 3225
/**
 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
 * field of @lpfc_cmd for device with SLI-4 interface spec.
 *
 * Return codes:
3226 3227
 *	1 - Error
 *	0 - Success
3228 3229 3230 3231 3232 3233 3234 3235
 **/
static int
lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct scatterlist *sgel = NULL;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3236
	struct sli4_sge *first_data_sgl;
3237 3238 3239 3240 3241 3242
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	dma_addr_t physaddr;
	uint32_t num_bde = 0;
	uint32_t dma_len;
	uint32_t dma_offset = 0;
	int nseg;
3243
	struct ulp_bde64 *bde;
3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259

	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.  Start the lpfc command prep by
	 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
	 * data bde entry.
	 */
	if (scsi_sg_count(scsi_cmnd)) {
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */

		nseg = scsi_dma_map(scsi_cmnd);
J
James Smart 已提交
3260
		if (unlikely(nseg <= 0))
3261 3262 3263 3264 3265 3266 3267
			return 1;
		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
		sgl += 1;
3268
		first_data_sgl = sgl;
3269 3270
		lpfc_cmd->seg_cnt = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3271 3272 3273 3274
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
				" %s: Too many sg segments from "
				"dma_map_sg.  Config %d, seg_cnt %d\n",
				__func__, phba->cfg_sg_seg_cnt,
3275
			       lpfc_cmd->seg_cnt);
3276
			lpfc_cmd->seg_cnt = 0;
3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294
			scsi_dma_unmap(scsi_cmnd);
			return 1;
		}

		/*
		 * The driver established a maximum scatter-gather segment count
		 * during probe that limits the number of sg elements in any
		 * single scsi command.  Just run through the seg_cnt and format
		 * the sge's.
		 * When using SLI-3 the driver will try to fit all the BDEs into
		 * the IOCB. If it can't then the BDEs get added to a BPL as it
		 * does for SLI-2 mode.
		 */
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
			physaddr = sg_dma_address(sgel);
			dma_len = sg_dma_len(sgel);
			sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3295
			sgl->word2 = le32_to_cpu(sgl->word2);
3296 3297 3298 3299 3300
			if ((num_bde + 1) == nseg)
				bf_set(lpfc_sli4_sge_last, sgl, 1);
			else
				bf_set(lpfc_sli4_sge_last, sgl, 0);
			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3301
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3302
			sgl->word2 = cpu_to_le32(sgl->word2);
3303
			sgl->sge_len = cpu_to_le32(dma_len);
3304 3305 3306
			dma_offset += dma_len;
			sgl++;
		}
3307 3308 3309 3310 3311 3312
		/*
		 * Setup the first Payload BDE. For FCoE we just key off
		 * Performance Hints, for FC we utilize fcp_embed_pbde.
		 */
		if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
		    phba->fcp_embed_pbde) {
3313 3314 3315 3316 3317 3318 3319 3320 3321
			bde = (struct ulp_bde64 *)
					&(iocb_cmd->unsli3.sli3Words[5]);
			bde->addrLow = first_data_sgl->addr_lo;
			bde->addrHigh = first_data_sgl->addr_hi;
			bde->tus.f.bdeSize =
					le32_to_cpu(first_data_sgl->sge_len);
			bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
			bde->tus.w = cpu_to_le32(bde->tus.w);
		}
3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342
	} else {
		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
	}

	/*
	 * Finish initializing those IOCB fields that are dependent on the
	 * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
	 * explicitly reinitialized.
	 * all iocb memory resources are reused.
	 */
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3343 3344 3345 3346 3347

	/*
	 * If the OAS driver feature is enabled and the lun is enabled for
	 * OAS, set the oas iocb related flags.
	 */
3348
	if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3349
		scsi_cmnd->device->hostdata)->oas_enabled) {
3350
		lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3351 3352 3353
		lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
			scsi_cmnd->device->hostdata)->priority;
	}
3354 3355 3356
	return 0;
}

3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373
/**
 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
 * two functions eventually, but for now, it's here
 **/
static int
lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
		struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3374
	uint32_t num_sge = 0;
3375 3376 3377 3378 3379 3380
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
	int fcpdl;

	/*
	 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3381
	 *  fcp_rsp regions to the first data sge entry
3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403
	 */
	if (scsi_sg_count(scsi_cmnd)) {
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */
		datasegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_sglist(scsi_cmnd),
					scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!datasegcnt))
			return 1;

		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);

		sgl += 1;
		lpfc_cmd->seg_cnt = datasegcnt;
3404 3405 3406 3407

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
3408 3409 3410 3411 3412

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
3413 3414 3415 3416 3417
			/* Here we need to add a DISEED to the count */
			if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
				goto err;

			num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3418
					datasegcnt);
3419

3420
			/* we should have 2 or more entries in buffer list */
3421
			if (num_sge < 2)
3422 3423
				goto err;
			break;
3424 3425

		case LPFC_PG_TYPE_DIF_BUF:
3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439
			/*
			 * This type indicates that protection buffers are
			 * passed to the driver, so that needs to be prepared
			 * for DMA
			 */
			protsegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_prot_sglist(scsi_cmnd),
					scsi_prot_sg_count(scsi_cmnd), datadir);
			if (unlikely(!protsegcnt)) {
				scsi_dma_unmap(scsi_cmnd);
				return 1;
			}

			lpfc_cmd->prot_seg_cnt = protsegcnt;
3440 3441 3442 3443 3444 3445 3446
			/*
			 * There is a minimun of 3 SGEs used for every
			 * protection data segment.
			 */
			if ((lpfc_cmd->prot_seg_cnt * 3) >
			    (phba->cfg_total_seg_cnt - 2))
				goto err;
3447

3448
			num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3449
					datasegcnt, protsegcnt);
3450

3451
			/* we should have 3 or more entries in buffer list */
3452 3453
			if ((num_sge < 3) ||
			    (num_sge > phba->cfg_total_seg_cnt))
3454 3455
				goto err;
			break;
3456

3457 3458
		case LPFC_PG_TYPE_INVALID:
		default:
3459 3460 3461
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

3462 3463 3464 3465 3466 3467 3468
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9083 Unexpected protection group %i\n",
					prot_group_type);
			return 1;
		}
	}

3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483
	switch (scsi_get_prot_op(scsi_cmnd)) {
	case SCSI_PROT_WRITE_STRIP:
	case SCSI_PROT_READ_STRIP:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
		break;
	case SCSI_PROT_WRITE_INSERT:
	case SCSI_PROT_READ_INSERT:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
		break;
	case SCSI_PROT_WRITE_PASS:
	case SCSI_PROT_READ_PASS:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
		break;
	}

3484 3485 3486 3487 3488 3489 3490 3491 3492
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
	fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
	iocb_cmd->un.fcpi.fcpi_parm = fcpdl;

3493 3494 3495 3496 3497 3498 3499 3500
	/*
	 * If the OAS driver feature is enabled and the lun is enabled for
	 * OAS, set the oas iocb related flags.
	 */
	if ((phba->cfg_fof) && ((struct lpfc_device_data *)
		scsi_cmnd->device->hostdata)->oas_enabled)
		lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);

3501 3502
	return 0;
err:
3503 3504 3505 3506 3507 3508 3509
	if (lpfc_cmd->seg_cnt)
		scsi_dma_unmap(scsi_cmnd);
	if (lpfc_cmd->prot_seg_cnt)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
			     scsi_prot_sg_count(scsi_cmnd),
			     scsi_cmnd->sc_data_direction);

3510
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3511 3512 3513 3514 3515 3516 3517 3518
			"9084 Cannot setup S/G List for HBA"
			"IO segs %d/%d SGL %d SCSI %d: %d %d\n",
			lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
			phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
			prot_group_type, num_sge);

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
3519 3520 3521
	return 1;
}

3522 3523 3524 3525 3526 3527 3528 3529 3530
/**
 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine wraps the actual DMA mapping function pointer from the
 * lpfc_hba struct.
 *
 * Return codes:
3531 3532
 *	1 - Error
 *	0 - Success
3533 3534 3535 3536 3537 3538 3539
 **/
static inline int
lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
}

3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558
/**
 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
 * using BlockGuard.
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine wraps the actual DMA mapping function pointer from the
 * lpfc_hba struct.
 *
 * Return codes:
 *	1 - Error
 *	0 - Success
 **/
static inline int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
}

3559
/**
3560
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580
 * @phba: Pointer to hba context object.
 * @vport: Pointer to vport object.
 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
 * @rsp_iocb: Pointer to response iocb object which reported error.
 *
 * This function posts an event when there is a SCSI command reporting
 * error from the scsi device.
 **/
static void
lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
		struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
	struct lpfc_fast_path_event *fast_path_evt = NULL;
	struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
	unsigned long flags;

3581 3582 3583
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652
	/* If there is queuefull or busy condition send a scsi event */
	if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
		(cmnd->result == SAM_STAT_BUSY)) {
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.scsi_evt.event_type =
			FC_REG_SCSI_EVENT;
		fast_path_evt->un.scsi_evt.subcategory =
		(cmnd->result == SAM_STAT_TASK_SET_FULL) ?
		LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
		fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
		memcpy(&fast_path_evt->un.scsi_evt.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.scsi_evt.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
	} else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
		((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.check_cond_evt.scsi_event.event_type =
			FC_REG_SCSI_EVENT;
		fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
			LPFC_EVENT_CHECK_COND;
		fast_path_evt->un.check_cond_evt.scsi_event.lun =
			cmnd->device->lun;
		memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
		fast_path_evt->un.check_cond_evt.sense_key =
			cmnd->sense_buffer[2] & 0xf;
		fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
		fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
	} else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
		     fcpi_parm &&
		     ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
			((scsi_status == SAM_STAT_GOOD) &&
			!(resp_info & (RESID_UNDER | RESID_OVER))))) {
		/*
		 * If status is good or resid does not match with fcp_param and
		 * there is valid fcpi_parm, then there is a read_check error
		 */
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.read_check_error.header.event_type =
			FC_REG_FABRIC_EVENT;
		fast_path_evt->un.read_check_error.header.subcategory =
			LPFC_EVENT_FCPRDCHKERR;
		memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
		fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
		fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
		fast_path_evt->un.read_check_error.fcpiparam =
			fcpi_parm;
	} else
		return;

	fast_path_evt->vport = vport;
	spin_lock_irqsave(&phba->hbalock, flags);
	list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
	spin_unlock_irqrestore(&phba->hbalock, flags);
	lpfc_worker_wake_up(phba);
	return;
}
3653 3654

/**
3655
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3656
 * @phba: The HBA for which this call is being executed.
3657 3658 3659
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
3660
 * field of @lpfc_cmd for device with SLI-3 interface spec.
3661
 **/
3662
static void
3663
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3664 3665 3666 3667 3668 3669 3670
{
	/*
	 * There are only two special cases to consider.  (1) the scsi command
	 * requested scatter-gather usage or (2) the scsi command allocated
	 * a request buffer, but did not request use_sg.  There is a third
	 * case, but it does not require resource deallocation.
	 */
3671 3672
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
3673 3674 3675 3676
	if (psb->prot_seg_cnt > 0)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
				scsi_prot_sg_count(psb->pCmd),
				psb->pCmd->sc_data_direction);
3677 3678
}

3679
/**
3680
 * lpfc_handler_fcp_err - FCP response handler
3681 3682 3683 3684 3685 3686 3687 3688
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 * @rsp_iocb: The response IOCB which contains FCP error.
 *
 * This routine is called to process response IOCB with status field
 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
 * based upon SCSI and FCP error.
 **/
已提交
3689
static void
J
James Smart 已提交
3690 3691
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
3692
{
3693
	struct lpfc_hba *phba = vport->phba;
已提交
3694 3695 3696
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3697
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
3698 3699
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
3700
	uint32_t *lp;
已提交
3701 3702
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
3703
	uint32_t fcpDl;
3704
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
3705

3706

已提交
3707 3708 3709 3710 3711 3712 3713 3714 3715 3716
	/*
	 *  If this is a task management command, there is no
	 *  scsi packet associated with this lpfc_cmd.  The driver
	 *  consumes it.
	 */
	if (fcpcmd->fcpCntl2) {
		scsi_status = 0;
		goto out;
	}

3717 3718
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
3719
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3720 3721
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2719 Invalid response length: "
H
Hannes Reinecke 已提交
3722
				 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3723 3724 3725 3726 3727 3728
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 rsplen);
			host_status = DID_ERROR;
			goto out;
		}
3729 3730 3731 3732
		if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2757 Protocol failure detected during "
				 "processing of FCP I/O op: "
H
Hannes Reinecke 已提交
3733
				 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3734 3735 3736 3737 3738 3739
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 fcprsp->rspInfo3);
			host_status = DID_ERROR;
			goto out;
		}
3740 3741
	}

3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752
	if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
		uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
		if (snslen > SCSI_SENSE_BUFFERSIZE)
			snslen = SCSI_SENSE_BUFFERSIZE;

		if (resp_info & RSP_LEN_VALID)
		  rsplen = be32_to_cpu(fcprsp->rspRspLen);
		memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
	}
	lp = (uint32_t *)cmnd->sense_buffer;

3753 3754 3755 3756 3757 3758 3759 3760 3761
	/* special handling for under run conditions */
	if (!scsi_status && (resp_info & RESID_UNDER)) {
		/* don't log under runs if fcp set... */
		if (vport->cfg_log_verbose & LOG_FCP)
			logit = LOG_FCP_ERROR;
		/* unless operator says so */
		if (vport->cfg_log_verbose & LOG_FCP_UNDER)
			logit = LOG_FCP_UNDER;
	}
3762

3763
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
3764
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3765 3766 3767 3768 3769 3770 3771
			 "Data: x%x x%x x%x x%x x%x\n",
			 cmnd->cmnd[0], scsi_status,
			 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
			 be32_to_cpu(fcprsp->rspResId),
			 be32_to_cpu(fcprsp->rspSnsLen),
			 be32_to_cpu(fcprsp->rspRspLen),
			 fcprsp->rspInfo3);
已提交
3772

3773
	scsi_set_resid(cmnd, 0);
3774
	fcpDl = be32_to_cpu(fcpcmd->fcpDl);
已提交
3775
	if (resp_info & RESID_UNDER) {
3776
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
3777

3778
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3779
				 "9025 FCP Underrun, expected %d, "
3780
				 "residual %d Data: x%x x%x x%x\n",
3781
				 fcpDl,
3782 3783
				 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
				 cmnd->underflow);
已提交
3784

3785
		/*
3786
		 * If there is an under run, check if under run reported by
3787 3788 3789
		 * storage array is same as the under run reported by HBA.
		 * If this is not same, there is a dropped frame.
		 */
3790
		if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3791 3792
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
3793
					 "9026 FCP Read Check Error "
3794
					 "and Underrun Data: x%x x%x x%x x%x\n",
3795
					 fcpDl,
3796 3797
					 scsi_get_resid(cmnd), fcpi_parm,
					 cmnd->cmnd[0]);
3798
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3799 3800
			host_status = DID_ERROR;
		}
已提交
3801 3802
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
L
Lucas De Marchi 已提交
3803
		 * be transferred for this command.  Provided a sense condition
已提交
3804 3805 3806 3807 3808
		 * is not present, make sure the actual amount transferred is at
		 * least the underflow value or fail.
		 */
		if (!(resp_info & SNS_LEN_VALID) &&
		    (scsi_status == SAM_STAT_GOOD) &&
3809 3810
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
3811
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3812
					 "9027 FCP command x%x residual "
3813 3814
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
3815
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
3816
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
3817 3818 3819
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
3820
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3821
				 "9028 FCP command x%x residual overrun error. "
3822
				 "Data: x%x x%x\n", cmnd->cmnd[0],
3823
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
3824 3825 3826 3827
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
3828
	 * (fcpi_parm should be zero). Apply check only to reads.
已提交
3829
	 */
3830
	} else if (fcpi_parm) {
3831
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3832
				 "9029 FCP %s Check Error xri x%x  Data: "
J
James Smart 已提交
3833
				 "x%x x%x x%x x%x x%x\n",
3834 3835 3836 3837 3838 3839
				 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
				 "Read" : "Write"),
				 ((phba->sli_rev == LPFC_SLI_REV4) ?
				 lpfc_cmd->cur_iocbq.sli4_xritag :
				 rsp_iocb->iocb.ulpContext),
				 fcpDl, be32_to_cpu(fcprsp->rspResId),
J
James Smart 已提交
3840
				 fcpi_parm, cmnd->cmnd[0], scsi_status);
3841 3842 3843 3844 3845 3846 3847 3848

		/* There is some issue with the LPe12000 that causes it
		 * to miscalculate the fcpi_parm and falsely trip this
		 * recovery logic.  Detect this case and don't error when true.
		 */
		if (fcpi_parm > fcpDl)
			goto out;

J
James Smart 已提交
3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859
		switch (scsi_status) {
		case SAM_STAT_GOOD:
		case SAM_STAT_CHECK_CONDITION:
			/* Fabric dropped a data frame. Fail any successful
			 * command in which we detected dropped frames.
			 * A status of good or some check conditions could
			 * be considered a successful command.
			 */
			host_status = DID_ERROR;
			break;
		}
3860
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
3861 3862 3863 3864
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
3865
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
3866 3867
}

3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888
/**
 * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
 * @phba: Pointer to HBA context object.
 *
 * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
 * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
 * held.
 * If scsi-mq is enabled, get the default block layer mapping of software queues
 * to hardware queues. This information is saved in request tag.
 *
 * Return: index into SLI4 fast-path FCP queue index.
 **/
int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
				  struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct lpfc_vector_map_info *cpup;
	int chann, cpu;
	uint32_t tag;
	uint16_t hwq;

3889
	if (cmnd && shost_use_blk_mq(cmnd->device->host)) {
3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905
		tag = blk_mq_unique_tag(cmnd->request);
		hwq = blk_mq_unique_tag_to_hwq(tag);

		return hwq;
	}

	if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU
	    && phba->cfg_fcp_io_channel > 1) {
		cpu = smp_processor_id();
		if (cpu < phba->sli4_hba.num_present_cpu) {
			cpup = phba->sli4_hba.cpu_map;
			cpup += cpu;
			return cpup->channel_id;
		}
	}
	chann = atomic_add_return(1, &phba->fcp_qidx);
J
James Smart 已提交
3906
	chann = chann % phba->cfg_fcp_io_channel;
3907 3908 3909 3910
	return chann;
}


3911
/**
3912
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3913 3914
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3915
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
3916 3917 3918 3919 3920
 *
 * This routine assigns scsi command result by looking into response IOCB
 * status field appropriately. This routine handles QUEUE FULL condition as
 * well by ramping down device queue depth.
 **/
已提交
3921 3922 3923 3924 3925 3926
static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
			struct lpfc_iocbq *pIocbOut)
{
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) pIocbIn->context1;
J
James Smart 已提交
3927
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
3928 3929
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
3930
	struct scsi_cmnd *cmd;
3931
	unsigned long flags;
3932
	struct lpfc_fast_path_event *fast_path_evt;
3933
	struct Scsi_Host *shost;
3934
	uint32_t logit = LOG_FCP;
已提交
3935

3936
	atomic_inc(&phba->fc4ScsiIoCmpls);
3937

3938 3939
	/* Sanity check on return of outstanding command */
	cmd = lpfc_cmd->pCmd;
3940 3941
	if (!cmd)
		return;
3942 3943
	shost = cmd->device->host;

3944
	lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
已提交
3945
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3946 3947 3948
	/* pick up SLI4 exhange busy status from HBA */
	lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;

3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (lpfc_cmd->prot_data_type) {
		struct scsi_dif_tuple *src = NULL;

		src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
		/*
		 * Used to restore any changes to protection
		 * data for error injection.
		 */
		switch (lpfc_cmd->prot_data_type) {
		case LPFC_INJERR_REFTAG:
			src->ref_tag =
				lpfc_cmd->prot_data;
			break;
		case LPFC_INJERR_APPTAG:
			src->app_tag =
				(uint16_t)lpfc_cmd->prot_data;
			break;
		case LPFC_INJERR_GUARD:
			src->guard_tag =
				(uint16_t)lpfc_cmd->prot_data;
			break;
		default:
			break;
		}

		lpfc_cmd->prot_data = 0;
		lpfc_cmd->prot_data_type = 0;
		lpfc_cmd->prot_data_segment = NULL;
	}
#endif
J
James Smart 已提交
3980

3981 3982
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
3983 3984 3985 3986 3987 3988 3989

	if (lpfc_cmd->status) {
		if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
		    (lpfc_cmd->result & IOERR_DRVR_MASK))
			lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		else if (lpfc_cmd->status >= IOSTAT_CNT)
			lpfc_cmd->status = IOSTAT_DEFAULT;
3990 3991 3992 3993
		if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
		    !lpfc_cmd->fcp_rsp->rspStatus3 &&
		    (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
		    !(vport->cfg_log_verbose & LOG_FCP_UNDER))
3994 3995 3996 3997
			logit = 0;
		else
			logit = LOG_FCP | LOG_FCP_UNDER;
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
H
Hannes Reinecke 已提交
3998
			 "9030 FCP cmd x%x failed <%d/%lld> "
3999 4000 4001
			 "status: x%x result: x%x "
			 "sid: x%x did: x%x oxid: x%x "
			 "Data: x%x x%x\n",
4002 4003 4004 4005
			 cmd->cmnd[0],
			 cmd->device ? cmd->device->id : 0xffff,
			 cmd->device ? cmd->device->lun : 0xffff,
			 lpfc_cmd->status, lpfc_cmd->result,
4006 4007
			 vport->fc_myDID,
			 (pnode) ? pnode->nlp_DID : 0,
4008 4009
			 phba->sli_rev == LPFC_SLI_REV4 ?
			     lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4010 4011
			 pIocbOut->iocb.ulpContext,
			 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
已提交
4012 4013 4014 4015

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
4016
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
4017 4018 4019
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
4020
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044
			fast_path_evt = lpfc_alloc_fast_evt(phba);
			if (!fast_path_evt)
				break;
			fast_path_evt->un.fabric_evt.event_type =
				FC_REG_FABRIC_EVENT;
			fast_path_evt->un.fabric_evt.subcategory =
				(lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
				LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
			if (pnode && NLP_CHK_NODE_ACT(pnode)) {
				memcpy(&fast_path_evt->un.fabric_evt.wwpn,
					&pnode->nlp_portname,
					sizeof(struct lpfc_name));
				memcpy(&fast_path_evt->un.fabric_evt.wwnn,
					&pnode->nlp_nodename,
					sizeof(struct lpfc_name));
			}
			fast_path_evt->vport = vport;
			fast_path_evt->work_evt.evt =
				LPFC_EVT_FASTPATH_MGMT_EVT;
			spin_lock_irqsave(&phba->hbalock, flags);
			list_add_tail(&fast_path_evt->work_evt.evt_listp,
				&phba->work_list);
			spin_unlock_irqrestore(&phba->hbalock, flags);
			lpfc_worker_wake_up(phba);
已提交
4045
			break;
4046
		case IOSTAT_LOCAL_REJECT:
4047
		case IOSTAT_REMOTE_STOP:
4048 4049 4050 4051 4052 4053 4054 4055 4056
			if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
			    lpfc_cmd->result ==
					IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
			    lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
			    lpfc_cmd->result ==
					IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
				cmd->result = ScsiResult(DID_NO_CONNECT, 0);
				break;
			}
4057
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4058
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
4059 4060
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4061
				cmd->result = ScsiResult(DID_REQUEUE, 0);
4062
				break;
4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078
			}
			if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
			     lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
			     pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
				if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
					/*
					 * This is a response for a BG enabled
					 * cmd. Parse BG error
					 */
					lpfc_parse_bg_err(phba, lpfc_cmd,
							pIocbOut);
					break;
				} else {
					lpfc_printf_vlog(vport, KERN_WARNING,
							LOG_BG,
							"9031 non-zero BGSTAT "
4079
							"on unprotected cmd\n");
4080 4081
				}
			}
4082 4083 4084 4085 4086 4087 4088 4089
			if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
				&& (phba->sli_rev == LPFC_SLI_REV4)
				&& (pnode && NLP_CHK_NODE_ACT(pnode))) {
				/* This IO was aborted by the target, we don't
				 * know the rxid and because we did not send the
				 * ABTS we cannot generate and RRQ.
				 */
				lpfc_set_rrq_active(phba, pnode,
4090 4091
					lpfc_cmd->cur_iocbq.sli4_lxritag,
					0, 0);
4092
			}
4093
		/* else: fall through */
已提交
4094 4095 4096 4097 4098
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

4099
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4100
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4101 4102
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
4103
	} else
已提交
4104 4105 4106 4107 4108
		cmd->result = ScsiResult(DID_OK, 0);

	if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
		uint32_t *lp = (uint32_t *)cmd->sense_buffer;

4109
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
H
Hannes Reinecke 已提交
4110
				 "0710 Iodone <%d/%llu> cmd %p, error "
4111 4112 4113 4114
				 "x%x SNS x%x x%x Data: x%x x%x\n",
				 cmd->device->id, cmd->device->lun, cmd,
				 cmd->result, *lp, *(lp + 3), cmd->retries,
				 scsi_get_resid(cmd));
已提交
4115 4116
	}

4117
	lpfc_update_stats(phba, lpfc_cmd);
4118 4119 4120
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4121
		spin_lock_irqsave(shost->host_lock, flags);
4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133
		if (pnode && NLP_CHK_NODE_ACT(pnode)) {
			if (pnode->cmd_qdepth >
				atomic_read(&pnode->cmd_pending) &&
				(atomic_read(&pnode->cmd_pending) >
				LPFC_MIN_TGT_QDEPTH) &&
				((cmd->cmnd[0] == READ_10) ||
				(cmd->cmnd[0] == WRITE_10)))
				pnode->cmd_qdepth =
					atomic_read(&pnode->cmd_pending);

			pnode->last_change_time = jiffies;
		}
4134
		spin_unlock_irqrestore(shost->host_lock, flags);
4135
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4136 4137
		if ((pnode->cmd_qdepth != vport->cfg_tgt_queue_depth) &&
		    time_after(jiffies, pnode->last_change_time +
4138
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4139
			spin_lock_irqsave(shost->host_lock, flags);
4140
			pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4141
			pnode->last_change_time = jiffies;
4142
			spin_unlock_irqrestore(shost->host_lock, flags);
4143
		}
4144 4145
	}

4146
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4147

4148
	spin_lock_irqsave(&phba->hbalock, flags);
4149
	lpfc_cmd->pCmd = NULL;
4150
	spin_unlock_irqrestore(&phba->hbalock, flags);
4151

4152 4153 4154
	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	cmd->scsi_done(cmd);

4155 4156 4157 4158
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
4159
	spin_lock_irqsave(shost->host_lock, flags);
4160 4161
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
4162
	spin_unlock_irqrestore(shost->host_lock, flags);
4163

4164
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4165 4166
}

4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184
/**
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
 * @data: A pointer to the immediate command data portion of the IOCB.
 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
 *
 * The routine copies the entire FCP command from @fcp_cmnd to @data while
 * byte swapping the data to big endian format for transmission on the wire.
 **/
static void
lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
{
	int i, j;
	for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
	     i += sizeof(uint32_t), j++) {
		((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
	}
}

4185
/**
4186
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4187 4188 4189 4190 4191
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: The scsi command which needs to send.
 * @pnode: Pointer to lpfc_nodelist.
 *
 * This routine initializes fcp_cmnd and iocb data structure from scsi command
4192
 * to transfer for device with SLI3 interface spec.
4193
 **/
已提交
4194
static void
4195
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
4196
		    struct lpfc_nodelist *pnode)
已提交
4197
{
J
James Smart 已提交
4198
	struct lpfc_hba *phba = vport->phba;
已提交
4199 4200 4201 4202 4203
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
	int datadir = scsi_cmnd->sc_data_direction;
4204 4205
	uint8_t *ptr;
	bool sli4;
4206
	uint32_t fcpdl;
已提交
4207

4208 4209 4210
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
4211
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4212 4213
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
4214

4215 4216
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
4217

4218 4219 4220 4221 4222 4223 4224
	ptr = &fcp_cmnd->fcpCdb[0];
	memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
	if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
		ptr += scsi_cmnd->cmd_len;
		memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
	}

4225
	fcp_cmnd->fcpCntl1 = SIMPLE_Q;
已提交
4226

4227
	sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4228
	piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4229

已提交
4230 4231 4232 4233 4234 4235
	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.  Start the lpfc command prep by
	 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
	 * data bde entry.
	 */
4236
	if (scsi_sg_count(scsi_cmnd)) {
已提交
4237 4238
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4239
			iocb_cmd->ulpPU = PARM_READ_CHECK;
4240 4241
			if (vport->cfg_first_burst_size &&
			    (pnode->nlp_flag & NLP_FIRSTBURST)) {
4242 4243 4244 4245 4246 4247
				fcpdl = scsi_bufflen(scsi_cmnd);
				if (fcpdl < vport->cfg_first_burst_size)
					piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl;
				else
					piocbq->iocb.un.fcpi.fcpi_XRdy =
						vport->cfg_first_burst_size;
4248
			}
已提交
4249
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
4250
			atomic_inc(&phba->fc4ScsiOutputRequests);
已提交
4251 4252 4253 4254
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			fcp_cmnd->fcpCntl3 = READ_DATA;
4255
			atomic_inc(&phba->fc4ScsiInputRequests);
已提交
4256 4257 4258 4259 4260 4261
		}
	} else {
		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
		iocb_cmd->un.fcpi.fcpi_parm = 0;
		iocb_cmd->ulpPU = 0;
		fcp_cmnd->fcpCntl3 = 0;
4262
		atomic_inc(&phba->fc4ScsiControlRequests);
已提交
4263
	}
4264 4265 4266
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
4267 4268 4269 4270 4271
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
4272
	if (sli4)
4273 4274
		piocbq->iocb.ulpContext =
		  phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
已提交
4275 4276
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
4277 4278
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
4279 4280 4281 4282 4283

	piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
	piocbq->context1  = lpfc_cmd;
	piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
	piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
J
James Smart 已提交
4284
	piocbq->vport = vport;
已提交
4285 4286
}

4287
/**
4288
 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4289 4290 4291 4292 4293
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 * @lun: Logical unit number.
 * @task_mgmt_cmd: SCSI task management command.
 *
4294 4295
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
4296 4297 4298 4299 4300
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
4301
static int
4302
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
4303
			     struct lpfc_scsi_buf *lpfc_cmd,
H
Hannes Reinecke 已提交
4304
			     uint64_t lun,
已提交
4305 4306 4307 4308 4309
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
4310
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
4311 4312
	struct lpfc_nodelist *ndlp = rdata->pnode;

4313 4314
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
4315 4316 4317
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
4318 4319
	piocbq->vport = vport;

已提交
4320 4321 4322
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
4323 4324 4325
	/* Clear out any old data in the FCP command area */
	memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
	int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
已提交
4326
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4327 4328
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4329
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
4330 4331
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
4332 4333 4334 4335
	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
		piocb->ulpContext =
		  vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
	}
4336
	piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
已提交
4337
	piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4338 4339
	piocb->ulpPU = 0;
	piocb->un.fcpi.fcpi_parm = 0;
已提交
4340 4341 4342 4343 4344 4345 4346 4347

	/* ulpTimeout is only one byte */
	if (lpfc_cmd->timeout > 0xff) {
		/*
		 * Do not timeout the command at the firmware level.
		 * The driver will provide the timeout mechanism.
		 */
		piocb->ulpTimeout = 0;
4348
	} else
已提交
4349
		piocb->ulpTimeout = lpfc_cmd->timeout;
4350

4351 4352
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4353

4354
	return 1;
4355 4356 4357
}

/**
L
Lucas De Marchi 已提交
4358
 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369
 * @phba: The hba struct for which this call is being executed.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine sets up the SCSI interface API function jump table in @phba
 * struct.
 * Returns: 0 - success, -ENODEV - failure.
 **/
int
lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{

4370 4371 4372
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;

4373 4374 4375 4376
	switch (dev_grp) {
	case LPFC_PCI_DEV_LP:
		phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4377
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4378
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4379
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4380
		break;
4381 4382 4383
	case LPFC_PCI_DEV_OC:
		phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4384
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4385
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4386
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4387
		break;
4388 4389 4390 4391 4392 4393 4394 4395
	default:
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"1418 Invalid HBA PCI-device group: 0x%x\n",
				dev_grp);
		return -ENODEV;
		break;
	}
	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4396
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4397 4398 4399
	return 0;
}

4400
/**
4401
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4402 4403 4404 4405 4406 4407 4408
 * @phba: The Hba for which this call is being executed.
 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
 * @rspiocbq: Pointer to lpfc_iocbq data structure.
 *
 * This routine is IOCB completion routine for device reset and target reset
 * routine. This routine release scsi buffer associated with lpfc_cmd.
 **/
4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420
static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
			struct lpfc_iocbq *cmdiocbq,
			struct lpfc_iocbq *rspiocbq)
{
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) cmdiocbq->context1;
	if (lpfc_cmd)
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	return;
}

4421
/**
4422
 * lpfc_info - Info entry point of scsi_host_template data structure
4423 4424 4425 4426 4427 4428 4429
 * @host: The scsi host for which this call is being executed.
 *
 * This routine provides module information about hba.
 *
 * Reutrn code:
 *   Pointer to char - Success.
 **/
已提交
4430 4431 4432
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
4433 4434
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4435
	int len, link_speed = 0;
已提交
4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454
	static char  lpfcinfobuf[384];

	memset(lpfcinfobuf,0,384);
	if (phba && phba->pcidev){
		strncpy(lpfcinfobuf, phba->ModelDesc, 256);
		len = strlen(lpfcinfobuf);
		snprintf(lpfcinfobuf + len,
			384-len,
			" on PCI bus %02x device %02x irq %d",
			phba->pcidev->bus->number,
			phba->pcidev->devfn,
			phba->pcidev->irq);
		len = strlen(lpfcinfobuf);
		if (phba->Port[0]) {
			snprintf(lpfcinfobuf + len,
				 384-len,
				 " port %s",
				 phba->Port);
		}
4455
		len = strlen(lpfcinfobuf);
4456
		link_speed = lpfc_sli_port_speed_get(phba);
4457 4458 4459
		if (link_speed != 0)
			snprintf(lpfcinfobuf + len, 384-len,
				 " Logical Link Speed: %d Mbps", link_speed);
已提交
4460 4461 4462 4463
	}
	return lpfcinfobuf;
}

4464
/**
4465
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4466 4467 4468 4469 4470
 * @phba: The Hba for which this call is being executed.
 *
 * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
 * The default value of cfg_poll_tmo is 10 milliseconds.
 **/
4471 4472 4473 4474 4475
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

4476
	if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4477 4478 4479 4480
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

4481
/**
4482
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4483 4484 4485 4486
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
4487 4488 4489 4490 4491
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

4492
/**
4493
 * lpfc_poll_timeout - Restart polling timer
4494 4495 4496 4497 4498 4499
 * @ptr: Map to lpfc_hba data structure pointer.
 *
 * This routine restarts fcp_poll timer, when FCP ring  polling is enable
 * and FCP Ring interrupt is disable.
 **/

4500
void lpfc_poll_timeout(struct timer_list *t)
4501
{
4502
	struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4503 4504

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4505
		lpfc_sli_handle_fast_ring_event(phba,
4506
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4507

4508 4509 4510 4511 4512
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

4513
/**
4514
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525
 * @cmnd: Pointer to scsi_cmnd data structure.
 * @done: Pointer to done routine.
 *
 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
 * This routine prepares an IOCB from scsi command and provides to firmware.
 * The @done callback is invoked after driver finished processing the command.
 *
 * Return value :
 *   0 - Success
 *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
 **/
已提交
4526
static int
4527
lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
已提交
4528
{
J
James Smart 已提交
4529 4530
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4531
	struct lpfc_rport_data *rdata;
4532
	struct lpfc_nodelist *ndlp;
4533
	struct lpfc_scsi_buf *lpfc_cmd;
4534 4535
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
4536

4537
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4538 4539 4540
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
4541 4542
		goto out_fail_command;
	}
4543
	ndlp = rdata->pnode;
已提交
4544

4545
	if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4546
		(!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4547

4548 4549 4550 4551
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
				" op:%02x str=%s without registering for"
				" BlockGuard - Rejecting command\n",
4552 4553 4554 4555 4556
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
4557
	/*
4558 4559
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
4560
	 */
4561 4562
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
		goto out_tgt_busy;
4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586
	if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
				 "3377 Target Queue Full, scsi Id:%d Qdepth:%d"
				 " Pending command:%d"
				 " WWNN:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
				 " WWPN:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
				 ndlp->nlp_sid, ndlp->cmd_qdepth,
				 atomic_read(&ndlp->cmd_pending),
				 ndlp->nlp_nodename.u.wwn[0],
				 ndlp->nlp_nodename.u.wwn[1],
				 ndlp->nlp_nodename.u.wwn[2],
				 ndlp->nlp_nodename.u.wwn[3],
				 ndlp->nlp_nodename.u.wwn[4],
				 ndlp->nlp_nodename.u.wwn[5],
				 ndlp->nlp_nodename.u.wwn[6],
				 ndlp->nlp_nodename.u.wwn[7],
				 ndlp->nlp_portname.u.wwn[0],
				 ndlp->nlp_portname.u.wwn[1],
				 ndlp->nlp_portname.u.wwn[2],
				 ndlp->nlp_portname.u.wwn[3],
				 ndlp->nlp_portname.u.wwn[4],
				 ndlp->nlp_portname.u.wwn[5],
				 ndlp->nlp_portname.u.wwn[6],
				 ndlp->nlp_portname.u.wwn[7]);
4587
		goto out_tgt_busy;
4588
	}
4589
	lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
已提交
4590
	if (lpfc_cmd == NULL) {
4591
		lpfc_rampdown_queue_depth(phba);
4592

4593
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4594 4595
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
4596 4597 4598 4599 4600 4601 4602 4603 4604 4605
		goto out_host_busy;
	}

	/*
	 * Store the midlayer's command structure for the completion phase
	 * and complete the command initialization.
	 */
	lpfc_cmd->pCmd  = cmnd;
	lpfc_cmd->rdata = rdata;
	lpfc_cmd->timeout = 0;
4606
	lpfc_cmd->start_time = jiffies;
已提交
4607 4608
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;

4609
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4610
		if (vport->phba->cfg_enable_bg) {
4611 4612
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4613 4614 4615 4616 4617 4618 4619
					 "9033 BLKGRD: rcvd %s cmd:x%x "
					 "sector x%llx cnt %u pt %x\n",
					 dif_op_str[scsi_get_prot_op(cmnd)],
					 cmnd->cmnd[0],
					 (unsigned long long)scsi_get_lba(cmnd),
					 blk_rq_sectors(cmnd->request),
					 (cmnd->cmnd[1]>>5));
4620
		}
4621 4622
		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
4623
		if (vport->phba->cfg_enable_bg) {
4624 4625
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4626 4627 4628 4629
					 "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
					 "x%x sector x%llx cnt %u pt %x\n",
					 cmnd->cmnd[0],
					 (unsigned long long)scsi_get_lba(cmnd),
4630
					 blk_rq_sectors(cmnd->request),
4631
					 (cmnd->cmnd[1]>>5));
4632
		}
4633 4634 4635
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
4636 4637 4638
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
4639
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
4640

4641
	atomic_inc(&ndlp->cmd_pending);
4642
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4643
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4644 4645
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
4646 4647
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "3376 FCP could not issue IOCB err %x"
H
Hannes Reinecke 已提交
4648
				 "FCP cmd x%x <%d/%llu> "
4649 4650 4651 4652
				 "sid: x%x did: x%x oxid: x%x "
				 "Data: x%x x%x x%x x%x\n",
				 err, cmnd->cmnd[0],
				 cmnd->device ? cmnd->device->id : 0xffff,
H
Hannes Reinecke 已提交
4653
				 cmnd->device ? cmnd->device->lun : (u64) -1,
4654 4655 4656 4657 4658 4659 4660 4661 4662
				 vport->fc_myDID, ndlp->nlp_DID,
				 phba->sli_rev == LPFC_SLI_REV4 ?
				 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
				 lpfc_cmd->cur_iocbq.iocb.ulpContext,
				 lpfc_cmd->cur_iocbq.iocb.ulpIoTag,
				 lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
				 (uint32_t)
				 (cmnd->request->timeout / 1000));

4663 4664 4665 4666 4667 4668 4669 4670 4671 4672
		switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
		case WRITE_DATA:
			atomic_dec(&phba->fc4ScsiOutputRequests);
			break;
		case READ_DATA:
			atomic_dec(&phba->fc4ScsiInputRequests);
			break;
		default:
			atomic_dec(&phba->fc4ScsiControlRequests);
		}
已提交
4673
		goto out_host_busy_free_buf;
4674
	}
4675
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4676
		lpfc_sli_handle_fast_ring_event(phba,
4677
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4678

4679 4680 4681 4682
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
4683 4684 4685
	return 0;

 out_host_busy_free_buf:
4686
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4687
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4688 4689 4690
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

4691 4692 4693
 out_tgt_busy:
	return SCSI_MLQUEUE_TARGET_BUSY;

已提交
4694
 out_fail_command:
4695
	cmnd->scsi_done(cmnd);
已提交
4696 4697 4698
	return 0;
}

J
Jeff Garzik 已提交
4699

4700
/**
4701
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4702 4703 4704 4705 4706 4707 4708 4709
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
4710
static int
4711
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
4712
{
J
James Smart 已提交
4713 4714 4715
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4716 4717
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
4718 4719
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
4720
	int ret = SUCCESS, status = 0;
4721
	struct lpfc_sli_ring *pring_s4;
4722
	int ret_val;
4723
	unsigned long flags, iflags;
4724
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
4725

4726
	status = fc_block_scsi_eh(cmnd);
4727
	if (status != 0 && status != SUCCESS)
4728
		return status;
4729

4730
	spin_lock_irqsave(&phba->hbalock, flags);
4731 4732
	/* driver queued commands are in process of being flushed */
	if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4733
		spin_unlock_irqrestore(&phba->hbalock, flags);
4734 4735 4736 4737 4738 4739
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3168 SCSI Layer abort requested I/O has been "
			"flushed by LLD.\n");
		return FAILED;
	}

4740
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4741
	if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4742
		spin_unlock_irqrestore(&phba->hbalock, flags);
J
James Smart 已提交
4743 4744
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
H
Hannes Reinecke 已提交
4745
			 "x%x ID %d LUN %llu\n",
4746
			 SUCCESS, cmnd->device->id, cmnd->device->lun);
J
James Smart 已提交
4747 4748
		return SUCCESS;
	}
已提交
4749

4750 4751 4752
	iocb = &lpfc_cmd->cur_iocbq;
	/* the command is in process of being cancelled */
	if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4753
		spin_unlock_irqrestore(&phba->hbalock, flags);
4754 4755 4756 4757 4758
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3169 SCSI Layer abort requested I/O has been "
			"cancelled by LLD.\n");
		return FAILED;
	}
4759 4760 4761 4762
	/*
	 * If pCmd field of the corresponding lpfc_scsi_buf structure
	 * points to a different SCSI command, then the driver has
	 * already completed this command, but the midlayer did not
4763
	 * see the completion before the eh fired. Just return SUCCESS.
4764
	 */
4765 4766 4767 4768 4769 4770
	if (lpfc_cmd->pCmd != cmnd) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3170 SCSI Layer abort requested I/O has been "
			"completed by LLD.\n");
		goto out_unlock;
	}
已提交
4771

4772
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
4773

4774 4775 4776 4777 4778 4779 4780 4781
	/* abort issued in recovery is still in progress */
	if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "3389 SCSI Layer I/O Abort Request is pending\n");
		spin_unlock_irqrestore(&phba->hbalock, flags);
		goto wait_for_cmpl;
	}

4782
	abtsiocb = __lpfc_sli_get_iocbq(phba);
4783 4784
	if (abtsiocb == NULL) {
		ret = FAILED;
4785
		goto out_unlock;
已提交
4786 4787
	}

4788 4789 4790
	/* Indicate the IO is being aborted by the driver. */
	iocb->iocb_flag |= LPFC_DRIVER_ABORTED;

已提交
4791
	/*
4792 4793 4794
	 * The scsi command can not be in txq and it is in flight because the
	 * pCmd is still pointig at the SCSI command we have to abort. There
	 * is no need to search the txcmplq. Just send an abort to the FW.
已提交
4795 4796
	 */

4797 4798 4799 4800
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
4801 4802 4803 4804
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
4805

4806 4807
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
4808 4809

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
4810
	abtsiocb->hba_wqidx = iocb->hba_wqidx;
4811
	abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4812 4813
	if (iocb->iocb_flag & LPFC_IO_FOF)
		abtsiocb->iocb_flag |= LPFC_IO_FOF;
4814

J
James Smart 已提交
4815
	if (lpfc_is_link_up(phba))
4816 4817 4818
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
4819

4820
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
4821
	abtsiocb->vport = vport;
4822
	if (phba->sli_rev == LPFC_SLI_REV4) {
4823 4824 4825 4826 4827
		pring_s4 = lpfc_sli4_calc_ring(phba, iocb);
		if (pring_s4 == NULL) {
			ret = FAILED;
			goto out_unlock;
		}
4828 4829 4830 4831 4832 4833 4834 4835 4836
		/* Note: both hbalock and ring_lock must be set here */
		spin_lock_irqsave(&pring_s4->ring_lock, iflags);
		ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
						abtsiocb, 0);
		spin_unlock_irqrestore(&pring_s4->ring_lock, iflags);
	} else {
		ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
						abtsiocb, 0);
	}
4837
	/* no longer need the lock after this point */
4838
	spin_unlock_irqrestore(&phba->hbalock, flags);
4839

4840 4841

	if (ret_val == IOCB_ERROR) {
4842 4843 4844 4845
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
4846

4847
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4848
		lpfc_sli_handle_fast_ring_event(phba,
4849
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4850

4851
wait_for_cmpl:
4852
	lpfc_cmd->waitq = &waitq;
4853
	/* Wait for abort to complete */
4854 4855
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
4856
			   msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4857 4858

	spin_lock_irqsave(shost->host_lock, flags);
4859
	lpfc_cmd->waitq = NULL;
4860
	spin_unlock_irqrestore(shost->host_lock, flags);
已提交
4861

4862 4863
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
4864 4865
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
4866
				 "for aborting I/O (xri:x%x) to complete: "
H
Hannes Reinecke 已提交
4867
				 "ret %#x, ID %d, LUN %llu\n",
4868 4869
				 iocb->sli4_xritag, ret,
				 cmnd->device->id, cmnd->device->lun);
已提交
4870
	}
4871
	goto out;
已提交
4872

4873
out_unlock:
4874
	spin_unlock_irqrestore(&phba->hbalock, flags);
4875
out:
4876 4877
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
H
Hannes Reinecke 已提交
4878
			 "LUN %llu\n", ret, cmnd->device->id,
4879
			 cmnd->device->lun);
4880
	return ret;
4881 4882
}

4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905
static char *
lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
{
	switch (task_mgmt_cmd) {
	case FCP_ABORT_TASK_SET:
		return "ABORT_TASK_SET";
	case FCP_CLEAR_TASK_SET:
		return "FCP_CLEAR_TASK_SET";
	case FCP_BUS_RESET:
		return "FCP_BUS_RESET";
	case FCP_LUN_RESET:
		return "FCP_LUN_RESET";
	case FCP_TARGET_RESET:
		return "FCP_TARGET_RESET";
	case FCP_CLEAR_ACA:
		return "FCP_CLEAR_ACA";
	case FCP_TERMINATE_TASK:
		return "FCP_TERMINATE_TASK";
	default:
		return "unknown";
	}
}

4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972

/**
 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 *
 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
static int
lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd)
{
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	uint32_t rsp_info;
	uint32_t rsp_len;
	uint8_t  rsp_info_code;
	int ret = FAILED;


	if (fcprsp == NULL)
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0703 fcp_rsp is missing\n");
	else {
		rsp_info = fcprsp->rspStatus2;
		rsp_len = be32_to_cpu(fcprsp->rspRspLen);
		rsp_info_code = fcprsp->rspInfo3;


		lpfc_printf_vlog(vport, KERN_INFO,
				 LOG_FCP,
				 "0706 fcp_rsp valid 0x%x,"
				 " rsp len=%d code 0x%x\n",
				 rsp_info,
				 rsp_len, rsp_info_code);

		if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) {
			switch (rsp_info_code) {
			case RSP_NO_FAILURE:
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0715 Task Mgmt No Failure\n");
				ret = SUCCESS;
				break;
			case RSP_TM_NOT_SUPPORTED: /* TM rejected */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0716 Task Mgmt Target "
						"reject\n");
				break;
			case RSP_TM_NOT_COMPLETED: /* TM failed */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0717 Task Mgmt Target "
						"failed TM\n");
				break;
			case RSP_TM_INVALID_LU: /* TM to invalid LU! */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0718 Task Mgmt to invalid "
						"LUN\n");
				break;
			}
		}
	}
	return ret;
}


4973
/**
4974 4975 4976 4977 4978 4979
 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
 * @vport: The virtual port for which this call is being executed.
 * @rdata: Pointer to remote port local data
 * @tgt_id: Target ID of remote device.
 * @lun_id: Lun number for the TMF
 * @task_mgmt_cmd: type of TMF to send
4980
 *
4981 4982
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
4983
 *
4984 4985 4986
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
4987
 **/
已提交
4988
static int
4989 4990 4991
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
		   unsigned int tgt_id, uint64_t lun_id,
		   uint8_t task_mgmt_cmd)
已提交
4992
{
J
James Smart 已提交
4993
	struct lpfc_hba   *phba = vport->phba;
4994
	struct lpfc_scsi_buf *lpfc_cmd;
4995 4996
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
4997 4998
	struct lpfc_rport_data *rdata;
	struct lpfc_nodelist *pnode;
4999
	int ret;
5000
	int status;
已提交
5001

5002 5003
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
	if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5004
		return FAILED;
5005
	pnode = rdata->pnode;
5006

5007
	lpfc_cmd = lpfc_get_scsi_buf(phba, pnode);
已提交
5008
	if (lpfc_cmd == NULL)
5009
		return FAILED;
5010
	lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5011
	lpfc_cmd->rdata = rdata;
5012
	lpfc_cmd->pCmd = cmnd;
已提交
5013

5014 5015
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
5016 5017 5018 5019
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
5020

5021
	iocbq = &lpfc_cmd->cur_iocbq;
5022
	iocbqrsp = lpfc_sli_get_iocbq(phba);
5023 5024 5025 5026
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
5027
	iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5028

5029
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
H
Hannes Reinecke 已提交
5030
			 "0702 Issue %s to TGT %d LUN %llu "
5031
			 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5032
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5033 5034
			 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
			 iocbq->iocb_flag);
5035

5036
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5037
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
5038 5039
	if ((status != IOCB_SUCCESS) ||
	    (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5040 5041 5042 5043 5044 5045 5046 5047 5048 5049
		if (status != IOCB_SUCCESS ||
		    iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0727 TMF %s to TGT %d LUN %llu "
					 "failed (%d, %d) iocb_flag x%x\n",
					 lpfc_taskmgmt_name(task_mgmt_cmd),
					 tgt_id, lun_id,
					 iocbqrsp->iocb.ulpStatus,
					 iocbqrsp->iocb.un.ulpWord[4],
					 iocbq->iocb_flag);
5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063
		/* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
		if (status == IOCB_SUCCESS) {
			if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
				/* Something in the FCP_RSP was invalid.
				 * Check conditions */
				ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
			else
				ret = FAILED;
		} else if (status == IOCB_TIMEDOUT) {
			ret = TIMEOUT_ERROR;
		} else {
			ret = FAILED;
		}
	} else
5064 5065
		ret = SUCCESS;

5066
	lpfc_sli_release_iocbq(phba, iocbqrsp);
5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088

	if (ret != TIMEOUT_ERROR)
		lpfc_release_scsi_buf(phba, lpfc_cmd);

	return ret;
}

/**
 * lpfc_chk_tgt_mapped -
 * @vport: The virtual port to check on
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine delays until the scsi target (aka rport) for the
 * command exists (is present and logged in) or we declare it non-existent.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
{
5089
	struct lpfc_rport_data *rdata;
5090
	struct lpfc_nodelist *pnode;
5091 5092
	unsigned long later;

5093
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5094 5095 5096 5097 5098 5099
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			"0797 Tgt Map rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110
	/*
	 * If target is not in a MAPPED state, delay until
	 * target is rediscovered or devloss timeout expires.
	 */
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies)) {
		if (!pnode || !NLP_CHK_NODE_ACT(pnode))
			return FAILED;
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
			return SUCCESS;
		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5111
		rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146
		if (!rdata)
			return FAILED;
		pnode = rdata->pnode;
	}
	if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
	    (pnode->nlp_state != NLP_STE_MAPPED_NODE))
		return FAILED;
	return SUCCESS;
}

/**
 * lpfc_reset_flush_io_context -
 * @vport: The virtual port (scsi_host) for the flush context
 * @tgt_id: If aborting by Target contect - specifies the target id
 * @lun_id: If aborting by Lun context - specifies the lun id
 * @context: specifies the context level to flush at.
 *
 * After a reset condition via TMF, we need to flush orphaned i/o
 * contexts from the adapter. This routine aborts any contexts
 * outstanding, then waits for their completions. The wait is
 * bounded by devloss_tmo though.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
			uint64_t lun_id, lpfc_ctx_cmd context)
{
	struct lpfc_hba   *phba = vport->phba;
	unsigned long later;
	int cnt;

	cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5147
	if (cnt)
5148
		lpfc_sli_abort_taskmgmt(vport,
5149
					&phba->sli.sli3_ring[LPFC_FCP_RING],
5150
					tgt_id, lun_id, context);
5151 5152 5153
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5154
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
5155 5156
	}
	if (cnt) {
5157
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5158 5159 5160 5161 5162 5163
			"0724 I/O flush failure for context %s : cnt x%x\n",
			((context == LPFC_CTX_LUN) ? "LUN" :
			 ((context == LPFC_CTX_TGT) ? "TGT" :
			  ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
			cnt);
		return FAILED;
已提交
5164
	}
5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183
	return SUCCESS;
}

/**
 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a device reset by sending a LUN_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5184
	struct lpfc_rport_data *rdata;
5185
	struct lpfc_nodelist *pnode;
5186
	unsigned tgt_id = cmnd->device->id;
H
Hannes Reinecke 已提交
5187
	uint64_t lun_id = cmnd->device->lun;
5188
	struct lpfc_scsi_event_header scsi_event;
5189
	int status;
5190

5191
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5192
	if (!rdata || !rdata->pnode) {
5193
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5194 5195
				 "0798 Device Reset rport failure: rdata x%p\n",
				 rdata);
5196 5197 5198
		return FAILED;
	}
	pnode = rdata->pnode;
5199
	status = fc_block_scsi_eh(cmnd);
5200
	if (status != 0 && status != SUCCESS)
5201
		return status;
5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0721 Device Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_LUNRESET;
	scsi_event.lun = lun_id;
	memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));

	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);

5219
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5220 5221 5222
						FCP_LUN_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
H
Hannes Reinecke 已提交
5223
			 "0713 SCSI layer issued Device Reset (%d, %llu) "
5224 5225 5226 5227 5228 5229 5230 5231
			 "return x%x\n", tgt_id, lun_id, status);

	/*
	 * We have to clean up i/o as : they may be orphaned by the TMF;
	 * or if the TMF failed, they may be in an indeterminate state.
	 * So, continue on.
	 * We will report success if all the i/o aborts successfully.
	 */
5232 5233
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5234
						LPFC_CTX_LUN);
5235 5236

	return status;
5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254
}

/**
 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a target reset by sending a TARGET_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5255
	struct lpfc_rport_data *rdata;
5256
	struct lpfc_nodelist *pnode;
5257
	unsigned tgt_id = cmnd->device->id;
H
Hannes Reinecke 已提交
5258
	uint64_t lun_id = cmnd->device->lun;
5259
	struct lpfc_scsi_event_header scsi_event;
5260
	int status;
5261

5262
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5263 5264 5265 5266 5267 5268
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0799 Target Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
5269
	status = fc_block_scsi_eh(cmnd);
5270
	if (status != 0 && status != SUCCESS)
5271
		return status;
5272 5273 5274 5275 5276

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0722 Target Reset rport failure: rdata x%p\n", rdata);
5277 5278 5279 5280 5281 5282
		if (pnode) {
			spin_lock_irq(shost->host_lock);
			pnode->nlp_flag &= ~NLP_NPR_ADISC;
			pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
			spin_unlock_irq(shost->host_lock);
		}
5283 5284 5285
		lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					  LPFC_CTX_TGT);
		return FAST_IO_FAIL;
5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296
	}

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_TGTRESET;
	scsi_event.lun = 0;
	memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));

	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);

5297
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5298 5299 5300
					FCP_TARGET_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
H
Hannes Reinecke 已提交
5301
			 "0723 SCSI layer issued Target Reset (%d, %llu) "
5302 5303 5304 5305 5306 5307 5308 5309
			 "return x%x\n", tgt_id, lun_id, status);

	/*
	 * We have to clean up i/o as : they may be orphaned by the TMF;
	 * or if the TMF failed, they may be in an indeterminate state.
	 * So, continue on.
	 * We will report success if all the i/o aborts successfully.
	 */
5310 5311
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5312
					  LPFC_CTX_TGT);
5313
	return status;
已提交
5314 5315
}

5316
/**
5317
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5318 5319
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
5320 5321
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
5322
 *
5323 5324 5325
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
5326
 **/
5327
static int
5328
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
5329
{
J
James Smart 已提交
5330 5331
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
5332
	struct lpfc_nodelist *ndlp = NULL;
5333
	struct lpfc_scsi_event_header scsi_event;
5334 5335
	int match;
	int ret = SUCCESS, status, i;
5336 5337 5338 5339 5340 5341 5342

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_BUSRESET;
	scsi_event.lun = 0;
	memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));

5343 5344
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
5345

5346
	status = fc_block_scsi_eh(cmnd);
5347
	if (status != 0 && status != SUCCESS)
5348
		return status;
5349

已提交
5350 5351 5352 5353 5354
	/*
	 * Since the driver manages a single bus device, reset all
	 * targets known to the driver.  Should any target reset
	 * fail, this routine returns failure to the midlayer.
	 */
5355
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
5356
		/* Search for mapped node by target ID */
已提交
5357
		match = 0;
J
James Smart 已提交
5358 5359
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5360 5361
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
5362 5363 5364
			if (vport->phba->cfg_fcp2_no_tgt_reset &&
			    (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
				continue;
5365
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5366
			    ndlp->nlp_sid == i &&
5367 5368
			    ndlp->rport &&
			    ndlp->nlp_type & NLP_FCP_TARGET) {
已提交
5369 5370 5371 5372
				match = 1;
				break;
			}
		}
J
James Smart 已提交
5373
		spin_unlock_irq(shost->host_lock);
已提交
5374 5375
		if (!match)
			continue;
5376

5377
		status = lpfc_send_taskmgmt(vport, cmnd,
5378 5379 5380
					i, 0, FCP_TARGET_RESET);

		if (status != SUCCESS) {
5381 5382 5383
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
5384
			ret = FAILED;
已提交
5385 5386
		}
	}
5387
	/*
5388 5389 5390 5391
	 * We have to clean up i/o as : they may be orphaned by the TMFs
	 * above; or if any of the TMFs failed, they may be in an
	 * indeterminate state.
	 * We will report success if all the i/o aborts successfully.
5392
	 */
5393 5394 5395

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
5396
		ret = FAILED;
5397

5398 5399
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
5400 5401 5402
	return ret;
}

5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426
/**
 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does host reset to the adaptor port. It brings the HBA
 * offline, performs a board restart, and then brings the board back online.
 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
 * reject all outstanding SCSI commands to the host and error returned
 * back to SCSI mid-level. As this will be SCSI mid-level's last resort
 * of error handling, it will only return error if resetting of the adapter
 * is not successful; in all other cases, will return success.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba *phba = vport->phba;
	int rc, ret = SUCCESS;

5427 5428 5429
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "3172 SCSI layer issued Host Reset Data:\n");

5430
	lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5431 5432 5433 5434
	lpfc_offline(phba);
	rc = lpfc_sli_brdrestart(phba);
	if (rc)
		ret = FAILED;
5435 5436 5437
	rc = lpfc_online(phba);
	if (rc)
		ret = FAILED;
5438 5439
	lpfc_unblock_mgmt_io(phba);

5440 5441 5442 5443 5444
	if (ret == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "3323 Failed host reset, bring it offline\n");
		lpfc_sli4_offline_eratt(phba);
	}
5445 5446 5447
	return ret;
}

5448
/**
5449
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460
 * @sdev: Pointer to scsi_device.
 *
 * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
 * globally available list of scsi buffers. This routine also makes sure scsi
 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
 * of scsi buffer exists for the lifetime of the driver.
 *
 * Return codes:
 *   non-0 - Error
 *   0 - Success
 **/
已提交
5461 5462 5463
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
5464 5465
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5466
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5467
	uint32_t total = 0;
已提交
5468
	uint32_t num_to_alloc = 0;
5469
	int num_allocated = 0;
5470
	uint32_t sdev_cnt;
5471 5472 5473
	struct lpfc_device_data *device_data;
	unsigned long flags;
	struct lpfc_name target_wwpn;
已提交
5474

5475
	if (!rport || fc_remote_port_chkready(rport))
已提交
5476 5477
		return -ENXIO;

5478
	if (phba->cfg_fof) {
5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496

		/*
		 * Check to see if the device data structure for the lun
		 * exists.  If not, create one.
		 */

		u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
		spin_lock_irqsave(&phba->devicelock, flags);
		device_data = __lpfc_get_device_data(phba,
						     &phba->luns,
						     &vport->fc_portname,
						     &target_wwpn,
						     sdev->lun);
		if (!device_data) {
			spin_unlock_irqrestore(&phba->devicelock, flags);
			device_data = lpfc_create_device_data(phba,
							&vport->fc_portname,
							&target_wwpn,
5497 5498 5499
							sdev->lun,
							phba->cfg_XLanePriority,
							true);
5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511
			if (!device_data)
				return -ENOMEM;
			spin_lock_irqsave(&phba->devicelock, flags);
			list_add_tail(&device_data->listentry, &phba->luns);
		}
		device_data->rport_data = rport->dd_data;
		device_data->available = true;
		spin_unlock_irqrestore(&phba->devicelock, flags);
		sdev->hostdata = device_data;
	} else {
		sdev->hostdata = rport->dd_data;
	}
5512
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
已提交
5513 5514 5515 5516

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
5517 5518 5519
	 * HBA limit conveyed to the midlayer via the host structure.  The
	 * formula accounts for the lun_queue_depth + error handlers + 1
	 * extra.  This list of scsi bufs exists for the lifetime of the driver.
已提交
5520 5521
	 */
	total = phba->total_scsi_bufs;
5522
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
5523

5524 5525 5526 5527
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

5528 5529
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5530 5531 5532
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
5533
		return 0;
5534 5535 5536
	/* Allow some exchanges to be available always to complete discovery */
	} else if (total + num_to_alloc >
		phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5537 5538 5539 5540 5541 5542
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0705 Allocation request of %d "
				 "command buffers will exceed max of %d.  "
				 "Reducing allocation request to %d.\n",
				 num_to_alloc, phba->cfg_hba_queue_depth,
				 (phba->cfg_hba_queue_depth - total));
已提交
5543 5544
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
5545 5546
	num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
	if (num_to_alloc != num_allocated) {
5547 5548 5549 5550 5551
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0708 Allocation request of %d "
					 "command buffers did not succeed.  "
					 "Allocated %d buffers.\n",
					 num_to_alloc, num_allocated);
已提交
5552
	}
5553 5554
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
已提交
5555 5556 5557
	return 0;
}

5558
/**
5559
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
5560 5561 5562 5563 5564 5565 5566 5567 5568
 * @sdev: Pointer to scsi_device.
 *
 * This routine configures following items
 *   - Tag command queuing support for @sdev if supported.
 *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
 *
 * Return codes:
 *   0 - Success
 **/
已提交
5569 5570 5571
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
5572 5573
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
5574

5575
	scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
已提交
5576

5577
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5578
		lpfc_sli_handle_fast_ring_event(phba,
5579
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5580 5581 5582 5583
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
5584 5585 5586
	return 0;
}

5587
/**
5588
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5589 5590 5591 5592
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
5593 5594 5595
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
5596 5597
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5598 5599 5600
	unsigned long flags;
	struct lpfc_device_data *device_data = sdev->hostdata;

5601
	atomic_dec(&phba->sdev_cnt);
5602
	if ((phba->cfg_fof) && (device_data)) {
5603 5604 5605 5606 5607 5608
		spin_lock_irqsave(&phba->devicelock, flags);
		device_data->available = false;
		if (!device_data->oas_enabled)
			lpfc_delete_device_data(phba, device_data);
		spin_unlock_irqrestore(&phba->devicelock, flags);
	}
已提交
5609 5610 5611 5612
	sdev->hostdata = NULL;
	return;
}

5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633
/**
 * lpfc_create_device_data - creates and initializes device data structure for OAS
 * @pha: Pointer to host bus adapter structure.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun on target
 * @atomic_create: Flag to indicate if memory should be allocated using the
 *		  GFP_ATOMIC flag or not.
 *
 * This routine creates a device data structure which will contain identifying
 * information for the device (host wwpn, target wwpn, lun), state of OAS,
 * whether or not the corresponding lun is available by the system,
 * and pointer to the rport data.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_device_data - Success
 **/
struct lpfc_device_data*
lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
			struct lpfc_name *target_wwpn, uint64_t lun,
5634
			uint32_t pri, bool atomic_create)
5635 5636 5637 5638 5639 5640
{

	struct lpfc_device_data *lun_info;
	int memory_flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5641
	    !(phba->cfg_fof))
5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660
		return NULL;

	/* Attempt to create the device data to contain lun info */

	if (atomic_create)
		memory_flags = GFP_ATOMIC;
	else
		memory_flags = GFP_KERNEL;
	lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
	if (!lun_info)
		return NULL;
	INIT_LIST_HEAD(&lun_info->listentry);
	lun_info->rport_data  = NULL;
	memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
	       sizeof(struct lpfc_name));
	memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
	       sizeof(struct lpfc_name));
	lun_info->device_id.lun = lun;
	lun_info->oas_enabled = false;
5661
	lun_info->priority = pri;
5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679
	lun_info->available = false;
	return lun_info;
}

/**
 * lpfc_delete_device_data - frees a device data structure for OAS
 * @pha: Pointer to host bus adapter structure.
 * @lun_info: Pointer to device data structure to free.
 *
 * This routine frees the previously allocated device data structure passed.
 *
 **/
void
lpfc_delete_device_data(struct lpfc_hba *phba,
			struct lpfc_device_data *lun_info)
{

	if (unlikely(!phba) || !lun_info  ||
5680
	    !(phba->cfg_fof))
5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713
		return;

	if (!list_empty(&lun_info->listentry))
		list_del(&lun_info->listentry);
	mempool_free(lun_info, phba->device_data_mem_pool);
	return;
}

/**
 * __lpfc_get_device_data - returns the device data for the specified lun
 * @pha: Pointer to host bus adapter structure.
 * @list: Point to list to search.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun on target
 *
 * This routine searches the list passed for the specified lun's device data.
 * This function does not hold locks, it is the responsibility of the caller
 * to ensure the proper lock is held before calling the function.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_device_data - Success
 **/
struct lpfc_device_data*
__lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
		       struct lpfc_name *vport_wwpn,
		       struct lpfc_name *target_wwpn, uint64_t lun)
{

	struct lpfc_device_data *lun_info;

	if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
5714
	    !phba->cfg_fof)
5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762
		return NULL;

	/* Check to see if the lun is already enabled for OAS. */

	list_for_each_entry(lun_info, list, listentry) {
		if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
			    sizeof(struct lpfc_name)) == 0) &&
		    (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
			    sizeof(struct lpfc_name)) == 0) &&
		    (lun_info->device_id.lun == lun))
			return lun_info;
	}

	return NULL;
}

/**
 * lpfc_find_next_oas_lun - searches for the next oas lun
 * @pha: Pointer to host bus adapter structure.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @starting_lun: Pointer to the lun to start searching for
 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
 * @found_target_wwpn: Pointer to the found lun's target wwpn information
 * @found_lun: Pointer to the found lun.
 * @found_lun_status: Pointer to status of the found lun.
 *
 * This routine searches the luns list for the specified lun
 * or the first lun for the vport/target.  If the vport wwpn contains
 * a zero value then a specific vport is not specified. In this case
 * any vport which contains the lun will be considered a match.  If the
 * target wwpn contains a zero value then a specific target is not specified.
 * In this case any target which contains the lun will be considered a
 * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
 * are returned.  The function will also return the next lun if available.
 * If the next lun is not found, starting_lun parameter will be set to
 * NO_MORE_OAS_LUN.
 *
 * Return codes:
 *   non-0 - Error
 *   0 - Success
 **/
bool
lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
		       struct lpfc_name *target_wwpn, uint64_t *starting_lun,
		       struct lpfc_name *found_vport_wwpn,
		       struct lpfc_name *found_target_wwpn,
		       uint64_t *found_lun,
5763 5764
		       uint32_t *found_lun_status,
		       uint32_t *found_lun_pri)
5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776
{

	unsigned long flags;
	struct lpfc_device_data *lun_info;
	struct lpfc_device_id *device_id;
	uint64_t lun;
	bool found = false;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
	    !starting_lun || !found_vport_wwpn ||
	    !found_target_wwpn || !found_lun || !found_lun_status ||
	    (*starting_lun == NO_MORE_OAS_LUN) ||
5777
	    !phba->cfg_fof)
5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810
		return false;

	lun = *starting_lun;
	*found_lun = NO_MORE_OAS_LUN;
	*starting_lun = NO_MORE_OAS_LUN;

	/* Search for lun or the lun closet in value */

	spin_lock_irqsave(&phba->devicelock, flags);
	list_for_each_entry(lun_info, &phba->luns, listentry) {
		if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
		     (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
			    sizeof(struct lpfc_name)) == 0)) &&
		    ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
		     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
			    sizeof(struct lpfc_name)) == 0)) &&
		    (lun_info->oas_enabled)) {
			device_id = &lun_info->device_id;
			if ((!found) &&
			    ((lun == FIND_FIRST_OAS_LUN) ||
			     (device_id->lun == lun))) {
				*found_lun = device_id->lun;
				memcpy(found_vport_wwpn,
				       &device_id->vport_wwpn,
				       sizeof(struct lpfc_name));
				memcpy(found_target_wwpn,
				       &device_id->target_wwpn,
				       sizeof(struct lpfc_name));
				if (lun_info->available)
					*found_lun_status =
						OAS_LUN_STATUS_EXISTS;
				else
					*found_lun_status = 0;
5811
				*found_lun_pri = lun_info->priority;
5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854
				if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
					memset(vport_wwpn, 0x0,
					       sizeof(struct lpfc_name));
				if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
					memset(target_wwpn, 0x0,
					       sizeof(struct lpfc_name));
				found = true;
			} else if (found) {
				*starting_lun = device_id->lun;
				memcpy(vport_wwpn, &device_id->vport_wwpn,
				       sizeof(struct lpfc_name));
				memcpy(target_wwpn, &device_id->target_wwpn,
				       sizeof(struct lpfc_name));
				break;
			}
		}
	}
	spin_unlock_irqrestore(&phba->devicelock, flags);
	return found;
}

/**
 * lpfc_enable_oas_lun - enables a lun for OAS operations
 * @pha: Pointer to host bus adapter structure.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun
 *
 * This routine enables a lun for oas operations.  The routines does so by
 * doing the following :
 *
 *   1) Checks to see if the device data for the lun has been created.
 *   2) If found, sets the OAS enabled flag if not set and returns.
 *   3) Otherwise, creates a device data structure.
 *   4) If successfully created, indicates the device data is for an OAS lun,
 *   indicates the lun is not available and add to the list of luns.
 *
 * Return codes:
 *   false - Error
 *   true - Success
 **/
bool
lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5855
		    struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5856 5857 5858 5859 5860 5861
{

	struct lpfc_device_data *lun_info;
	unsigned long flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5862
	    !phba->cfg_fof)
5863 5864 5865 5866 5867 5868 5869 5870 5871 5872
		return false;

	spin_lock_irqsave(&phba->devicelock, flags);

	/* Check to see if the device data for the lun has been created */
	lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
					  target_wwpn, lun);
	if (lun_info) {
		if (!lun_info->oas_enabled)
			lun_info->oas_enabled = true;
5873
		lun_info->priority = pri;
5874 5875 5876 5877 5878 5879
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}

	/* Create an lun info structure and add to list of luns */
	lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
5880
					   pri, false);
5881 5882
	if (lun_info) {
		lun_info->oas_enabled = true;
5883
		lun_info->priority = pri;
5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913
		lun_info->available = false;
		list_add_tail(&lun_info->listentry, &phba->luns);
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}
	spin_unlock_irqrestore(&phba->devicelock, flags);
	return false;
}

/**
 * lpfc_disable_oas_lun - disables a lun for OAS operations
 * @pha: Pointer to host bus adapter structure.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun
 *
 * This routine disables a lun for oas operations.  The routines does so by
 * doing the following :
 *
 *   1) Checks to see if the device data for the lun is created.
 *   2) If present, clears the flag indicating this lun is for OAS.
 *   3) If the lun is not available by the system, the device data is
 *   freed.
 *
 * Return codes:
 *   false - Error
 *   true - Success
 **/
bool
lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
5914
		     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5915 5916 5917 5918 5919 5920
{

	struct lpfc_device_data *lun_info;
	unsigned long flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5921
	    !phba->cfg_fof)
5922 5923 5924 5925 5926 5927 5928 5929 5930 5931
		return false;

	spin_lock_irqsave(&phba->devicelock, flags);

	/* Check to see if the lun is available. */
	lun_info = __lpfc_get_device_data(phba,
					  &phba->luns, vport_wwpn,
					  target_wwpn, lun);
	if (lun_info) {
		lun_info->oas_enabled = false;
5932
		lun_info->priority = pri;
5933 5934 5935 5936 5937 5938 5939 5940 5941
		if (!lun_info->available)
			lpfc_delete_device_data(phba, lun_info);
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}

	spin_unlock_irqrestore(&phba->devicelock, flags);
	return false;
}
5942

5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984
static int
lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
{
	return SCSI_MLQUEUE_HOST_BUSY;
}

static int
lpfc_no_handler(struct scsi_cmnd *cmnd)
{
	return FAILED;
}

static int
lpfc_no_slave(struct scsi_device *sdev)
{
	return -ENODEV;
}

struct scsi_host_template lpfc_template_nvme = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.proc_name		= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_no_command,
	.eh_abort_handler	= lpfc_no_handler,
	.eh_device_reset_handler = lpfc_no_handler,
	.eh_target_reset_handler = lpfc_no_handler,
	.eh_bus_reset_handler	= lpfc_no_handler,
	.eh_host_reset_handler  = lpfc_no_handler,
	.slave_alloc		= lpfc_no_slave,
	.slave_configure	= lpfc_no_slave,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
	.sg_tablesize		= 1,
	.cmd_per_lun		= 1,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_hba_attrs,
	.max_sectors		= 0xFFFF,
	.vendor_id		= LPFC_NL_VENDOR_ID,
	.track_queue_depth	= 0,
};

5985
struct scsi_host_template lpfc_template_no_hr = {
5986 5987
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
J
James Smart 已提交
5988
	.proc_name		= LPFC_DRIVER_NAME,
5989 5990
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
5991
	.eh_timed_out		= fc_eh_timed_out,
5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010
	.eh_abort_handler	= lpfc_abort_handler,
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_hba_attrs,
	.max_sectors		= 0xFFFF,
	.vendor_id		= LPFC_NL_VENDOR_ID,
	.change_queue_depth	= scsi_change_queue_depth,
	.track_queue_depth	= 1,
};

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struct scsi_host_template lpfc_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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James Smart 已提交
6014
	.proc_name		= LPFC_DRIVER_NAME,
已提交
6015 6016
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
6017
	.eh_timed_out		= fc_eh_timed_out,
已提交
6018
	.eh_abort_handler	= lpfc_abort_handler,
6019 6020
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
6021
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
6022
	.eh_host_reset_handler  = lpfc_host_reset_handler,
已提交
6023 6024 6025
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
6026
	.scan_finished		= lpfc_scan_finished,
已提交
6027
	.this_id		= -1,
6028
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
6029 6030
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
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James Smart 已提交
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	.shost_attrs		= lpfc_hba_attrs,
6032
	.max_sectors		= 0xFFFF,
6033
	.vendor_id		= LPFC_NL_VENDOR_ID,
6034
	.change_queue_depth	= scsi_change_queue_depth,
6035
	.track_queue_depth	= 1,
已提交
6036
};
6037 6038 6039 6040

struct scsi_host_template lpfc_vport_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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James Smart 已提交
6041
	.proc_name		= LPFC_DRIVER_NAME,
6042 6043
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
6044
	.eh_timed_out		= fc_eh_timed_out,
6045
	.eh_abort_handler	= lpfc_abort_handler,
6046 6047
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
6048 6049 6050 6051 6052
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
6053
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
6054 6055 6056 6057
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
6058
	.change_queue_depth	= scsi_change_queue_depth,
6059
	.track_queue_depth	= 1,
6060
};