lpfc_scsi.c 180.2 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 Inc. 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
		/*
		 * 4K Page alignment is CRITICAL to BlockGuard, double check
		 * to be sure.
		 */
840 841
		if ((phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
		    (((unsigned long)(psb->data) &
842
		    (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) {
843 844 845 846
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"3369 Memory alignment error "
					"addr=%lx\n",
					(unsigned long)psb->data);
847
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
848 849 850 851 852
				      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}

853 854 855

		lxri = lpfc_sli4_next_xritag(phba);
		if (lxri == NO_XRI) {
856
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
857
				      psb->data, psb->dma_handle);
858 859 860 861
			kfree(psb);
			break;
		}

862 863 864
		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
865
			dma_pool_free(phba->lpfc_sg_dma_buf_pool,
866
				      psb->data, psb->dma_handle);
867
			kfree(psb);
868
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
869
					"3368 Failed to allocate IOTAG for"
870 871
					" XRI:0x%x\n", lxri);
			lpfc_sli4_free_xri(phba, lxri);
872 873
			break;
		}
874 875
		psb->cur_iocbq.sli4_lxritag = lxri;
		psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
876 877
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
		psb->fcp_bpl = psb->data;
878
		psb->fcp_cmnd = (psb->data + sgl_size);
879 880 881 882 883 884
		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;
885
		pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
886 887 888
		pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);

		/*
889 890 891
		 * 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.
892 893 894
		 */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
895
		sgl->word2 = le32_to_cpu(sgl->word2);
896 897
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
898
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
899 900 901 902 903
		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));
904
		sgl->word2 = le32_to_cpu(sgl->word2);
905 906
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
907
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925

		/*
		 * 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;
926
		psb->cur_iocbq.context1 = psb;
927 928
		psb->dma_phys_bpl = pdma_phys_bpl;

929 930
		/* add the scsi buffer to a post list */
		list_add_tail(&psb->list, &post_sblist);
931
		spin_lock_irq(&phba->scsi_buf_list_get_lock);
932
		phba->sli4_hba.scsi_xri_cnt++;
933
		spin_unlock_irq(&phba->scsi_buf_list_get_lock);
934
	}
935
	lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP,
936 937 938 939 940 941 942 943 944 945 946
			"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;
947 948
}

949
/**
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
 * 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);
}

/**
968
 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
969
 * @phba: The HBA for which this call is being executed.
970 971 972 973 974 975 976 977
 *
 * 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
 **/
978
static struct lpfc_scsi_buf*
979
lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
已提交
980
{
981
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
982
	struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
983
	unsigned long iflag = 0;
984

985
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
986 987 988
	list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
			 list);
	if (!lpfc_cmd) {
989
		spin_lock(&phba->scsi_buf_list_put_lock);
990 991 992 993 994
		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);
995
		spin_unlock(&phba->scsi_buf_list_put_lock);
996
	}
997
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
998 999 1000 1001 1002

	if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
		atomic_inc(&ndlp->cmd_pending);
		lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
	}
1003 1004
	return  lpfc_cmd;
}
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
/**
 * 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)
{
1019
	struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next;
1020
	unsigned long iflag = 0;
1021 1022
	int found = 0;

1023
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
1024 1025
	list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
				 &phba->lpfc_scsi_buf_list_get, list) {
1026
		if (lpfc_test_rrq_active(phba, ndlp,
1027
					 lpfc_cmd->cur_iocbq.sli4_lxritag))
1028
			continue;
1029
		list_del_init(&lpfc_cmd->list);
1030
		found = 1;
1031
		break;
1032
	}
1033
	if (!found) {
1034
		spin_lock(&phba->scsi_buf_list_put_lock);
1035 1036 1037
		list_splice(&phba->lpfc_scsi_buf_list_put,
			    &phba->lpfc_scsi_buf_list_get);
		INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1038
		spin_unlock(&phba->scsi_buf_list_put_lock);
1039 1040
		list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next,
					 &phba->lpfc_scsi_buf_list_get, list) {
1041 1042 1043
			if (lpfc_test_rrq_active(
				phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
				continue;
1044
			list_del_init(&lpfc_cmd->list);
1045 1046 1047 1048
			found = 1;
			break;
		}
	}
1049
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
1050 1051
	if (!found)
		return NULL;
1052 1053 1054 1055 1056

	if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
		atomic_inc(&ndlp->cmd_pending);
		lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
	}
1057
	return  lpfc_cmd;
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
}
/**
 * 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
1075

1076
/**
1077
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1078 1079 1080 1081 1082 1083
 * @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.
 **/
1084
static void
1085
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1086
{
1087
	unsigned long iflag = 0;
已提交
1088

1089 1090 1091 1092 1093
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1094
	psb->pCmd = NULL;
1095
	psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1096 1097
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
	spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
已提交
1098 1099
}

1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
/**
 * 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;

1115 1116 1117 1118
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

1119
	if (psb->exch_busy) {
1120 1121 1122 1123 1124 1125 1126 1127 1128
		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;
1129
		psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1130 1131 1132
		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);
1133 1134 1135
	}
}

1136
/**
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
 * 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)
{
1147 1148
	if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
		atomic_dec(&psb->ndlp->cmd_pending);
1149

1150
	psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
1151 1152 1153 1154 1155
	phba->lpfc_release_scsi_buf(phba, psb);
}

/**
 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1156 1157 1158 1159
 * @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
1160
 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1161
 * through sg elements and format the bde. This routine also initializes all
1162
 * IOCB fields which are dependent on scsi command request buffer.
1163 1164 1165 1166 1167
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
1168
static int
1169
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1170 1171 1172 1173 1174
{
	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;
1175
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
已提交
1176
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1177
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1178
	dma_addr_t physaddr;
1179
	uint32_t num_bde = 0;
1180
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1181 1182 1183 1184 1185 1186 1187 1188

	/*
	 * 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;
1189
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1190 1191 1192 1193 1194 1195 1196
		/*
		 * 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.
		 */

1197 1198 1199 1200 1201
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1202
		lpfc_cmd->seg_cnt = nseg;
已提交
1203
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1204 1205
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1206
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1207
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1208
			       lpfc_cmd->seg_cnt);
1209
			lpfc_cmd->seg_cnt = 0;
1210
			scsi_dma_unmap(scsi_cmnd);
已提交
1211 1212 1213 1214 1215 1216 1217 1218
			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.
1219 1220 1221
		 * 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
1222
		 */
1223
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1224
			physaddr = sg_dma_address(sgel);
1225
			if (phba->sli_rev == 3 &&
1226
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1227
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243
			    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
1244
		}
1245
	}
已提交
1246 1247 1248

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1249 1250 1251
	 * 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
1252
	 */
1253
	if (phba->sli_rev == 3 &&
1254 1255
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
		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
1271
			/* ebde count includes the response bde and data bpl */
1272 1273
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
L
Lucas De Marchi 已提交
1274
			/* ebde count includes the response bde and data bdes */
1275 1276 1277 1278 1279
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
1280
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1281
	}
1282
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1283 1284 1285 1286 1287

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1288
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1289 1290 1291
	return 0;
}

1292
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1293

1294
/* Return BG_ERR_INIT if error injection is detected by Initiator */
1295
#define BG_ERR_INIT	0x1
1296
/* Return BG_ERR_TGT if error injection is detected by Target */
1297
#define BG_ERR_TGT	0x2
1298
/* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
1299
#define BG_ERR_SWAP	0x10
1300 1301 1302 1303
/**
 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
 * error injection
 **/
1304
#define BG_ERR_CHECK	0x20
1305 1306 1307 1308

/**
 * lpfc_bg_err_inject - Determine if we should inject an error
 * @phba: The Hba for which this call is being executed.
1309 1310 1311 1312 1313
 * @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
 *
1314
 * Returns BG_ERR_* bit mask or 0 if request ignored
1315
 **/
1316 1317 1318 1319 1320
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 */
1321
	struct lpfc_scsi_buf *lpfc_cmd = NULL;
1322
	struct scsi_dif_tuple *src = NULL;
1323 1324
	struct lpfc_nodelist *ndlp;
	struct lpfc_rport_data *rdata;
1325 1326 1327 1328 1329
	uint32_t op = scsi_get_prot_op(sc);
	uint32_t blksize;
	uint32_t numblks;
	sector_t lba;
	int rc = 0;
1330
	int blockoff = 0;
1331 1332 1333 1334

	if (op == SCSI_PROT_NORMAL)
		return 0;

1335
	sgpe = scsi_prot_sglist(sc);
1336
	lba = scsi_get_lba(sc);
1337 1338

	/* First check if we need to match the LBA */
1339 1340 1341 1342 1343 1344 1345 1346
	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;
1347 1348 1349 1350 1351 1352 1353
		if (sgpe) {
			blockoff = phba->lpfc_injerr_lba - lba;
			numblks = sg_dma_len(sgpe) /
				sizeof(struct scsi_dif_tuple);
			if (numblks < blockoff)
				blockoff = numblks;
		}
1354 1355
	}

1356
	/* Next check if we need to match the remote NPortID or WWPN */
1357
	rdata = lpfc_rport_data_from_scsi_device(sc->device);
1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382
	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;
	}

1383 1384
	/* Should we change the Reference Tag */
	if (reftag) {
1385 1386 1387
		if (phba->lpfc_injerr_wref_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1388 1389 1390 1391 1392 1393 1394 1395
				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.
					 */
1396 1397 1398 1399 1400

					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,
1401
					be32_to_cpu(src->ref_tag));
1402

1403
					/*
1404 1405
					 * Save the old ref_tag so we can
					 * restore it on completion.
1406
					 */
1407 1408 1409 1410 1411 1412 1413 1414 1415
					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);
1416
					phba->lpfc_injerr_wref_cnt--;
1417 1418 1419 1420 1421 1422 1423
					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));
					}
1424 1425
					rc = BG_ERR_TGT | BG_ERR_CHECK;

1426 1427 1428
					break;
				}
				/* Drop thru */
1429
			case SCSI_PROT_WRITE_INSERT:
1430
				/*
1431 1432 1433
				 * For WRITE_INSERT, force the error
				 * to be sent on the wire. It should be
				 * detected by the Target.
1434
				 */
1435
				/* DEADBEEF will be the reftag on the wire */
1436 1437
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1438 1439 1440 1441 1442 1443 1444
				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));
				}
1445
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1446 1447

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1448
					"9078 BLKGRD: Injecting reftag error: "
1449 1450
					"write lba x%lx\n", (unsigned long)lba);
				break;
1451
			case SCSI_PROT_WRITE_STRIP:
1452
				/*
1453 1454 1455
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1456
				 */
1457 1458
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1459 1460 1461 1462 1463 1464 1465
				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));
				}
1466
				rc = BG_ERR_INIT;
1467 1468

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1469
					"9077 BLKGRD: Injecting reftag error: "
1470
					"write lba x%lx\n", (unsigned long)lba);
1471
				break;
1472
			}
1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483
		}
		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.
				 */
1484 1485
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_rref_cnt--;
1486 1487 1488 1489 1490 1491 1492
				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));
				}
1493
				rc = BG_ERR_INIT;
1494 1495

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1496
					"9079 BLKGRD: Injecting reftag error: "
1497
					"read lba x%lx\n", (unsigned long)lba);
1498
				break;
1499 1500 1501 1502 1503 1504
			}
		}
	}

	/* Should we change the Application Tag */
	if (apptag) {
1505 1506 1507
		if (phba->lpfc_injerr_wapp_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1508
				if (src) {
1509 1510 1511 1512 1513 1514 1515 1516
					/*
					 * 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.
					 */

1517 1518 1519 1520
					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,
1521
					be16_to_cpu(src->app_tag));
1522 1523

					/*
1524 1525
					 * Save the old app_tag so we can
					 * restore it on completion.
1526
					 */
1527 1528 1529 1530 1531 1532 1533 1534 1535
					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);
1536
					phba->lpfc_injerr_wapp_cnt--;
1537 1538 1539 1540 1541 1542 1543
					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));
					}
1544
					rc = BG_ERR_TGT | BG_ERR_CHECK;
1545 1546 1547
					break;
				}
				/* Drop thru */
1548
			case SCSI_PROT_WRITE_INSERT:
1549
				/*
1550 1551 1552
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1553
				 */
1554
				/* DEAD will be the apptag on the wire */
1555 1556
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1557 1558 1559 1560 1561 1562 1563
				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));
				}
1564
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1565

1566
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1567
					"0813 BLKGRD: Injecting apptag error: "
1568 1569
					"write lba x%lx\n", (unsigned long)lba);
				break;
1570
			case SCSI_PROT_WRITE_STRIP:
1571
				/*
1572 1573 1574
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1575
				 */
1576 1577
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1578 1579 1580 1581 1582 1583 1584
				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));
				}
1585
				rc = BG_ERR_INIT;
1586 1587

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1588
					"0812 BLKGRD: Injecting apptag error: "
1589
					"write lba x%lx\n", (unsigned long)lba);
1590
				break;
1591
			}
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
		}
		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.
				 */
1603 1604
				*apptag = 0xDEAD;
				phba->lpfc_injerr_rapp_cnt--;
1605 1606 1607 1608 1609 1610 1611
				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));
				}
1612
				rc = BG_ERR_INIT;
1613 1614

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1615
					"0814 BLKGRD: Injecting apptag error: "
1616
					"read lba x%lx\n", (unsigned long)lba);
1617
				break;
1618 1619 1620 1621
			}
		}
	}

1622

1623
	/* Should we change the Guard Tag */
1624 1625 1626 1627
	if (new_guard) {
		if (phba->lpfc_injerr_wgrd_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1628
				rc = BG_ERR_CHECK;
1629
				/* Drop thru */
1630 1631

			case SCSI_PROT_WRITE_INSERT:
1632
				/*
1633 1634 1635
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1636 1637
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1638 1639 1640 1641 1642 1643 1644
				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));
				}
1645

1646
				rc |= BG_ERR_TGT | BG_ERR_SWAP;
1647
				/* Signals the caller to swap CRC->CSUM */
1648

1649
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1650
					"0817 BLKGRD: Injecting guard error: "
1651 1652
					"write lba x%lx\n", (unsigned long)lba);
				break;
1653
			case SCSI_PROT_WRITE_STRIP:
1654
				/*
1655 1656 1657
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1658 1659
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1660 1661 1662 1663 1664 1665 1666
				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));
				}
1667

1668
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1669 1670 1671
				/* Signals the caller to swap CRC->CSUM */

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1672
					"0816 BLKGRD: Injecting guard error: "
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687
					"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--;
1688 1689 1690 1691 1692 1693 1694
				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));
				}
1695

1696
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1697 1698 1699 1700 1701 1702
				/* 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);
			}
1703 1704
		}
	}
1705

1706 1707 1708 1709
	return rc;
}
#endif

1710 1711 1712 1713
/**
 * 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.
1714 1715 1716 1717 1718 1719
 * @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
 *
1720
 **/
1721
static int
1722 1723
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1724
{
1725
	uint8_t ret = 0;
1726

1727
	if (lpfc_cmd_guard_csum(sc)) {
1728 1729 1730
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1731
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1732
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1733 1734 1735 1736
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1737
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1738
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1739 1740
			break;

1741 1742
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1743
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1744
			*txop = BG_OP_IN_CSUM_OUT_CRC;
1745 1746 1747 1748
			break;

		case SCSI_PROT_NORMAL:
		default:
1749
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1750 1751
				"9063 BLKGRD: Bad op/guard:%d/IP combination\n",
					scsi_get_prot_op(sc));
1752
			ret = 1;
1753 1754 1755
			break;

		}
J
James Smart 已提交
1756
	} else {
1757 1758 1759
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1760
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1761
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1762 1763 1764 1765
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1766
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1767
			*txop = BG_OP_IN_CRC_OUT_CRC;
1768 1769 1770 1771
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
J
James Smart 已提交
1772
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1773
			*txop = BG_OP_IN_CRC_OUT_NODIF;
J
James Smart 已提交
1774 1775
			break;

1776 1777
		case SCSI_PROT_NORMAL:
		default:
1778
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1779 1780
				"9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
					scsi_get_prot_op(sc));
1781
			ret = 1;
1782 1783 1784 1785
			break;
		}
	}

1786
	return ret;
1787 1788
}

1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
#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;

1807
	if (lpfc_cmd_guard_csum(sc)) {
1808 1809 1810 1811
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1812
			*txop = BG_OP_IN_CRC_OUT_NODIF;
1813 1814 1815 1816 1817
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1818
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1819 1820 1821 1822
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1823
			*rxop = BG_OP_IN_CSUM_OUT_CRC;
1824
			*txop = BG_OP_IN_CRC_OUT_CSUM;
1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
			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;
1837
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1838 1839 1840 1841
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1842
			*rxop = BG_OP_IN_CSUM_OUT_CSUM;
1843
			*txop = BG_OP_IN_CSUM_OUT_CSUM;
1844 1845 1846 1847 1848
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1849
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
			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
1870 1871 1872 1873 1874 1875 1876 1877 1878
 * 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:
 *                                +-------------------------+
1879 1880 1881
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
1882 1883 1884 1885 1886 1887 1888 1889
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
1890 1891 1892
 *
 * Returns the number of BDEs added to the BPL.
 **/
1893 1894 1895 1896 1897
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 */
1898 1899
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1900
	dma_addr_t physaddr;
1901
	int i = 0, num_bde = 0, status;
1902
	int datadir = sc->sc_data_direction;
1903
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1904
	uint32_t rc;
1905
#endif
1906
	uint32_t checking = 1;
1907
	uint32_t reftag;
1908
	uint8_t txop, rxop;
1909

1910 1911
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1912 1913
		goto out;

1914
	/* extract some info from the scsi command for pde*/
1915
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1916

1917
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1918
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1919
	if (rc) {
1920
		if (rc & BG_ERR_SWAP)
1921
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1922
		if (rc & BG_ERR_CHECK)
1923 1924
			checking = 0;
	}
1925 1926
#endif

1927 1928 1929 1930 1931
	/* 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);

1932
	/* Endianness conversion if necessary for PDE5 */
1933
	pde5->word0 = cpu_to_le32(pde5->word0);
J
James Smart 已提交
1934
	pde5->reftag = cpu_to_le32(reftag);
1935

1936 1937 1938 1939 1940 1941 1942 1943 1944 1945
	/* 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);
1946 1947 1948 1949 1950

	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
1951
	if (datadir == DMA_FROM_DEVICE) {
1952
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1953 1954 1955 1956
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

1957
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1958 1959 1960
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);
1961 1962
	}
	bf_set(pde6_ai, pde6, 1);
J
James Smart 已提交
1963 1964
	bf_set(pde6_ae, pde6, 0);
	bf_set(pde6_apptagval, pde6, 0);
1965

1966
	/* Endianness conversion if necessary for PDE6 */
1967 1968 1969 1970
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

1971
	/* advance bpl and increment bde count */
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993
	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;
}

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
/**
 * 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
2004 2005 2006 2007 2008 2009 2010 2011 2012
 *
 * 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:
 *                                    +-------------------------+
2013
 *   start of first prot group  -->   |          PDE_5          |
2014
 *                                    +-------------------------+
2015 2016 2017
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
2018 2019 2020 2021 2022
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
2023
 *   start of new  prot group  -->    |          PDE_5          |
2024 2025 2026 2027 2028 2029
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
2030 2031 2032
 *
 * Returns the number of BDEs added to the BPL.
 **/
2033 2034 2035 2036 2037 2038
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 */
2039 2040
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
2041
	struct lpfc_pde7 *pde7 = NULL;
2042 2043
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
2044 2045
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2046 2047
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
2048
	int status;
2049 2050 2051
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
2052
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2053
	uint32_t rc;
2054
#endif
2055
	uint32_t checking = 1;
2056
	uint32_t reftag;
2057
	uint8_t txop, rxop;
2058 2059 2060 2061 2062 2063 2064
	int num_bde = 0;

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

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078
				"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
2079
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2080
	if (rc) {
2081
		if (rc & BG_ERR_SWAP)
2082
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2083
		if (rc & BG_ERR_CHECK)
2084 2085 2086 2087 2088 2089
			checking = 0;
	}
#endif

	split_offset = 0;
	do {
2090 2091 2092 2093
		/* Check to see if we ran out of space */
		if (num_bde >= (phba->cfg_total_seg_cnt - 2))
			return num_bde + 3;

2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
		/* 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);
2113

2114
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2115 2116 2117 2118
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

2119
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2120 2121 2122 2123
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);

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 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170
		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) {
2171 2172 2173 2174
			/* Check to see if we ran out of space */
			if (num_bde >= phba->cfg_total_seg_cnt)
				return num_bde + 1;

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 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287
			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;
2288
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2289
	uint32_t rc;
2290
#endif
2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
	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
2303
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2304
	if (rc) {
2305
		if (rc & BG_ERR_SWAP)
2306
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2307
		if (rc & BG_ERR_CHECK)
2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320
			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;

2321 2322 2323 2324 2325
	/*
	 * 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) {
2326
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2327 2328 2329 2330
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);

2331
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2332 2333 2334 2335 2336
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
	}

2337 2338 2339
	/* 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);
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 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431
	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;
2432
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2433
	uint32_t rc;
2434
#endif
2435 2436 2437 2438 2439 2440 2441 2442 2443 2444
	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",
2445 2446 2447 2448
				sgpe, sgde);
		return 0;
	}

2449 2450
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
2451 2452
		goto out;

2453
	/* extract some info from the scsi command */
2454
	blksize = lpfc_cmd_blksize(sc);
2455
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2456

2457
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2458
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2459
	if (rc) {
2460
		if (rc & BG_ERR_SWAP)
2461
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2462
		if (rc & BG_ERR_CHECK)
2463 2464
			checking = 0;
	}
2465 2466
#endif

2467 2468
	split_offset = 0;
	do {
2469 2470 2471 2472
		/* Check to see if we ran out of space */
		if (num_sge >= (phba->cfg_total_seg_cnt - 2))
			return num_sge + 3;

2473 2474 2475 2476 2477 2478 2479 2480 2481
		/* 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;

2482
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500
			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;
			}
		}


2501
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2502 2503 2504 2505
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);

2506 2507 2508
		/* 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);
2509

2510 2511 2512 2513 2514 2515 2516 2517 2518 2519
		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++;
2520 2521

		/* setup the first BDE that points to protection buffer */
2522 2523
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2524 2525 2526 2527

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

2528 2529 2530 2531 2532 2533
		/* 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);
2534

2535 2536 2537
		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

2538 2539 2540
		/* 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);
2541 2542
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
J
James Smart 已提交
2543
			protgrp_bytes = protgrp_blks * blksize;
2544 2545 2546 2547
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}
2548

2549
		num_sge++;
2550

2551
		/* setup SGE's for data blocks associated with DIF data */
2552 2553 2554
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
2555 2556 2557 2558
			/* Check to see if we ran out of space */
			if (num_sge >= phba->cfg_total_seg_cnt)
				return num_sge + 1;

2559
			if (!sgde) {
2560
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2561
					"9086 BLKGRD:%s Invalid data segment\n",
2562 2563 2564
						__func__);
				return 0;
			}
2565
			sgl++;
2566 2567 2568 2569 2570 2571
			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 */
2572
				dma_len = remainder;
2573 2574 2575 2576 2577 2578
				split_offset = 0;

				if ((subtotal + remainder) == protgrp_bytes)
					pgdone = 1;
			} else {
				/* must split this buffer with next prot grp */
2579 2580
				dma_len = protgrp_bytes - subtotal;
				split_offset += dma_len;
2581 2582
			}

2583
			subtotal += dma_len;
2584

2585 2586 2587 2588 2589
			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);
2590

2591 2592 2593 2594
			sgl->sge_len = cpu_to_le32(dma_len);
			dma_offset += dma_len;

			num_sge++;
2595 2596 2597 2598 2599 2600 2601 2602 2603
			curr_data++;

			if (split_offset)
				break;

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

2604 2605 2606
		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
2607
			sgl++;
2608 2609 2610
			continue;
		}

2611 2612
		/* are we done ? */
		if (curr_prot == protcnt) {
2613
			bf_set(lpfc_sli4_sge_last, sgl, 1);
2614 2615 2616 2617
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);
2618
			sgl++;
2619 2620 2621 2622 2623

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
2624
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2625
				"9085 BLKGRD: bug in %s\n", __func__);
2626 2627 2628
		}

	} while (!alldone);
2629

2630 2631
out:

2632
	return num_sge;
2633
}
2634

2635 2636 2637 2638 2639
/**
 * 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
 *
2640 2641 2642
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
2643 2644 2645
 * Returns: Protection group type (with or without DIF)
 *
 **/
2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663
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:
2664 2665 2666 2667
		if (phba)
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9021 Unsupported protection op:%d\n",
					op);
2668 2669 2670 2671 2672
		break;
	}
	return ret;
}

2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693
/**
 * 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) {
2694
		/* Read check for protection data */
2695 2696 2697 2698
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
			return fcpdl;

	} else {
2699
		/* Write check for protection data */
2700 2701 2702 2703 2704 2705
		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
2706 2707
	 * DIF (trailer) attached to it. Must ajust FCP data length
	 * to account for the protection data.
2708
	 */
2709
	fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2710 2711 2712 2713

	return fcpdl;
}

2714 2715 2716 2717 2718
/**
 * 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.
 *
2719 2720 2721
 * 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
2722
 **/
2723
static int
2724
lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2725 2726 2727 2728 2729 2730 2731 2732 2733
		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;
2734
	int fcpdl;
2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754

	/*
	 * 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;
2755 2756 2757 2758

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
2759 2760 2761 2762 2763

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
2764 2765 2766 2767 2768

			/* 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;

2769 2770
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
2771
			/* we should have 2 or more entries in buffer list */
2772 2773 2774
			if (num_bde < 2)
				goto err;
			break;
2775 2776

		case LPFC_PG_TYPE_DIF_BUF:
2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790
			/*
			 * 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;
2791 2792 2793 2794 2795 2796 2797 2798

			/*
			 * 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;
2799 2800 2801

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
2802
			/* we should have 3 or more entries in buffer list */
2803 2804
			if ((num_bde < 3) ||
			    (num_bde > phba->cfg_total_seg_cnt))
2805 2806
				goto err;
			break;
2807

2808 2809
		case LPFC_PG_TYPE_INVALID:
		default:
2810 2811 2812
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
			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;

2831
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2832 2833 2834 2835 2836 2837 2838 2839
	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
2840
	return 0;
2841
err:
2842 2843 2844 2845 2846 2847 2848
	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);

2849
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2850 2851 2852 2853
			"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,
2854
			prot_group_type, num_bde);
2855 2856 2857

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
2858 2859 2860
	return 1;
}

2861 2862 2863 2864 2865
/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CRC algorithmn
 * using crc_t10dif.
 */
2866
static uint16_t
2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881
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.
 */
2882
static uint16_t
2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894
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.
 */
2895
static void
2896 2897 2898 2899 2900 2901 2902
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;
2903
	uint16_t guard_tag;
2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
	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;

2945
		src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2946
		start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2947 2948 2949 2950 2951 2952 2953 2954 2955
		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
				 */
2956 2957
				if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
				    (src->app_tag == T10_PI_APP_ESCAPE)) {
2958 2959 2960 2961
					start_ref_tag++;
					goto skipit;
				}

2962
				/* First Guard Tag checking */
2963 2964
				if (chk_guard) {
					guard_tag = src->guard_tag;
2965
					if (lpfc_cmd_guard_csum(cmd))
2966 2967 2968 2969 2970 2971 2972 2973 2974 2975
						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;
					}
				}
2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990

				/* 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;
				}
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
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);
3033 3034
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3035 3036 3037 3038 3039 3040 3041 3042 3043
		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);
3044 3045
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3046 3047 3048 3049 3050 3051 3052 3053 3054 3055

		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);
3056 3057
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3058 3059 3060 3061 3062 3063 3064 3065 3066 3067

		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);
	}
}


3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092
/*
 * 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) {
3093 3094
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
3095
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3096
		lpfc_debug_save_data(phba, cmd);
3097 3098 3099 3100

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
3101 3102 3103 3104
			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);
3105 3106 3107 3108 3109 3110 3111
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
3112
		cmd->result = DID_ERROR << 16;
3113 3114 3115 3116 3117 3118
		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);
3119 3120 3121 3122 3123
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3124
		cmd->result = DID_ERROR << 16;
3125 3126 3127 3128 3129 3130
		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);
3131 3132 3133 3134 3135 3136 3137 3138 3139
		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);
3140 3141
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3142
		phba->bg_guard_err_cnt++;
3143 3144 3145 3146 3147 3148
		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);
3149 3150 3151 3152 3153 3154 3155
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x3);
3156 3157
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3158 3159

		phba->bg_reftag_err_cnt++;
3160 3161 3162 3163 3164 3165
		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);
3166 3167 3168 3169 3170 3171 3172
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x2);
3173 3174
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3175 3176

		phba->bg_apptag_err_cnt++;
3177 3178 3179 3180 3181 3182
		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);
3183 3184 3185 3186 3187
	}

	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
3188 3189 3190
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
3191
		 */
J
James Smart 已提交
3192 3193 3194 3195
		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 */
3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210

		/* 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;
		}
3211 3212 3213 3214

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

J
James Smart 已提交
3215 3216
		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3217 3218 3219 3220
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
3221 3222 3223 3224 3225 3226 3227 3228 3229
		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);
3230 3231 3232
	}
out:
	return ret;
已提交
3233 3234
}

3235 3236 3237 3238 3239 3240 3241 3242 3243
/**
 * 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:
3244 3245
 *	1 - Error
 *	0 - Success
3246 3247 3248 3249 3250 3251 3252 3253
 **/
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;
3254
	struct sli4_sge *first_data_sgl;
3255 3256 3257 3258 3259 3260
	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;
3261
	struct ulp_bde64 *bde;
3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277

	/*
	 * 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
3278
		if (unlikely(nseg <= 0))
3279 3280 3281 3282 3283 3284 3285
			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;
3286
		first_data_sgl = sgl;
3287 3288
		lpfc_cmd->seg_cnt = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3289 3290 3291 3292
			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,
3293
			       lpfc_cmd->seg_cnt);
3294
			lpfc_cmd->seg_cnt = 0;
3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312
			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));
3313
			sgl->word2 = le32_to_cpu(sgl->word2);
3314 3315 3316 3317 3318
			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);
3319
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3320
			sgl->word2 = cpu_to_le32(sgl->word2);
3321
			sgl->sge_len = cpu_to_le32(dma_len);
3322 3323 3324
			dma_offset += dma_len;
			sgl++;
		}
3325 3326
		/*
		 * Setup the first Payload BDE. For FCoE we just key off
3327 3328
		 * Performance Hints, for FC we use lpfc_enable_pbde.
		 * We populate words 13-15 of IOCB/WQE.
3329 3330
		 */
		if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3331
		    phba->cfg_enable_pbde) {
3332
			bde = (struct ulp_bde64 *)
3333
				&(iocb_cmd->unsli3.sli3Words[5]);
3334 3335 3336 3337 3338 3339 3340
			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);
		}
3341 3342 3343 3344 3345 3346
	} 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);
3347 3348 3349 3350 3351 3352 3353

		if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
		    phba->cfg_enable_pbde) {
			bde = (struct ulp_bde64 *)
				&(iocb_cmd->unsli3.sli3Words[5]);
			memset(bde, 0, (sizeof(uint32_t) * 3));
		}
3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368
	}

	/*
	 * 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);
3369 3370 3371 3372 3373

	/*
	 * If the OAS driver feature is enabled and the lun is enabled for
	 * OAS, set the oas iocb related flags.
	 */
3374
	if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3375
		scsi_cmnd->device->hostdata)->oas_enabled) {
3376
		lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3377 3378 3379
		lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
			scsi_cmnd->device->hostdata)->priority;
	}
3380 3381 3382
	return 0;
}

3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399
/**
 * 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;
3400
	uint32_t num_sge = 0;
3401 3402 3403 3404 3405 3406
	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
3407
	 *  fcp_rsp regions to the first data sge entry
3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429
	 */
	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;
3430 3431 3432 3433

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
3434 3435 3436 3437 3438

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
3439 3440 3441 3442 3443
			/* 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,
3444
					datasegcnt);
3445

3446
			/* we should have 2 or more entries in buffer list */
3447
			if (num_sge < 2)
3448 3449
				goto err;
			break;
3450 3451

		case LPFC_PG_TYPE_DIF_BUF:
3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465
			/*
			 * 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;
3466 3467 3468 3469 3470 3471 3472
			/*
			 * 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;
3473

3474
			num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3475
					datasegcnt, protsegcnt);
3476

3477
			/* we should have 3 or more entries in buffer list */
3478 3479
			if ((num_sge < 3) ||
			    (num_sge > phba->cfg_total_seg_cnt))
3480 3481
				goto err;
			break;
3482

3483 3484
		case LPFC_PG_TYPE_INVALID:
		default:
3485 3486 3487
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

3488 3489 3490 3491 3492 3493 3494
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9083 Unexpected protection group %i\n",
					prot_group_type);
			return 1;
		}
	}

3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509
	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;
	}

3510 3511 3512 3513 3514 3515 3516 3517 3518
	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;

3519 3520 3521 3522 3523 3524 3525 3526
	/*
	 * 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);

3527 3528
	return 0;
err:
3529 3530 3531 3532 3533 3534 3535
	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);

3536
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3537 3538 3539 3540 3541 3542 3543 3544
			"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;
3545 3546 3547
	return 1;
}

3548 3549 3550 3551 3552 3553 3554 3555 3556
/**
 * 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:
3557 3558
 *	1 - Error
 *	0 - Success
3559 3560 3561 3562 3563 3564 3565
 **/
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);
}

3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584
/**
 * 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);
}

3585
/**
3586
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606
 * @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;

3607 3608 3609
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

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 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678
	/* 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;
}
3679 3680

/**
3681
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3682
 * @phba: The HBA for which this call is being executed.
3683 3684 3685
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
3686
 * field of @lpfc_cmd for device with SLI-3 interface spec.
3687
 **/
3688
static void
3689
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3690 3691 3692 3693 3694 3695 3696
{
	/*
	 * 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.
	 */
3697 3698
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
3699 3700 3701 3702
	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);
3703 3704
}

3705
/**
3706
 * lpfc_handler_fcp_err - FCP response handler
3707 3708 3709 3710 3711 3712 3713 3714
 * @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
3715
static void
J
James Smart 已提交
3716 3717
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
3718
{
3719
	struct lpfc_hba *phba = vport->phba;
已提交
3720 3721 3722
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3723
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
3724 3725
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
3726
	uint32_t *lp;
已提交
3727 3728
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
3729
	uint32_t fcpDl;
3730
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
3731

3732

已提交
3733 3734 3735 3736 3737 3738 3739 3740 3741 3742
	/*
	 *  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;
	}

3743 3744
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
3745
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3746 3747
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2719 Invalid response length: "
H
Hannes Reinecke 已提交
3748
				 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n",
3749 3750 3751 3752 3753 3754
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 rsplen);
			host_status = DID_ERROR;
			goto out;
		}
3755 3756 3757 3758
		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
3759
				 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3760 3761 3762 3763 3764 3765
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 fcprsp->rspInfo3);
			host_status = DID_ERROR;
			goto out;
		}
3766 3767
	}

3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778
	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;

3779 3780 3781 3782 3783 3784 3785 3786 3787
	/* 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;
	}
3788

3789
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
3790
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3791 3792 3793 3794 3795 3796 3797
			 "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
3798

3799
	scsi_set_resid(cmnd, 0);
3800
	fcpDl = be32_to_cpu(fcpcmd->fcpDl);
已提交
3801
	if (resp_info & RESID_UNDER) {
3802
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
3803

3804
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3805
				 "9025 FCP Underrun, expected %d, "
3806
				 "residual %d Data: x%x x%x x%x\n",
3807
				 fcpDl,
3808 3809
				 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
				 cmnd->underflow);
已提交
3810

3811
		/*
3812
		 * If there is an under run, check if under run reported by
3813 3814 3815
		 * storage array is same as the under run reported by HBA.
		 * If this is not same, there is a dropped frame.
		 */
3816
		if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3817 3818
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
3819
					 "9026 FCP Read Check Error "
3820
					 "and Underrun Data: x%x x%x x%x x%x\n",
3821
					 fcpDl,
3822 3823
					 scsi_get_resid(cmnd), fcpi_parm,
					 cmnd->cmnd[0]);
3824
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3825 3826
			host_status = DID_ERROR;
		}
已提交
3827 3828
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
L
Lucas De Marchi 已提交
3829
		 * be transferred for this command.  Provided a sense condition
已提交
3830 3831 3832 3833 3834
		 * 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) &&
3835 3836
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
3837
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3838
					 "9027 FCP command x%x residual "
3839 3840
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
3841
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
3842
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
3843 3844 3845
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
3846
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3847
				 "9028 FCP command x%x residual overrun error. "
3848
				 "Data: x%x x%x\n", cmnd->cmnd[0],
3849
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
3850 3851 3852 3853
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
3854
	 * (fcpi_parm should be zero). Apply check only to reads.
已提交
3855
	 */
3856
	} else if (fcpi_parm) {
3857
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3858
				 "9029 FCP %s Check Error xri x%x  Data: "
J
James Smart 已提交
3859
				 "x%x x%x x%x x%x x%x\n",
3860 3861 3862 3863 3864 3865
				 ((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
3866
				 fcpi_parm, cmnd->cmnd[0], scsi_status);
3867 3868 3869 3870 3871 3872 3873 3874

		/* 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
3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885
		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;
		}
3886
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
3887 3888 3889
	}

 out:
3890
	cmnd->result = host_status << 16 | scsi_status;
3891
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
3892 3893
}

3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914
/**
 * 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;

3915
	if (cmnd && shost_use_blk_mq(cmnd->device->host)) {
3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931
		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
3932
	chann = chann % phba->cfg_fcp_io_channel;
3933 3934 3935 3936
	return chann;
}


3937
/**
3938
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3939 3940
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3941
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
3942 3943 3944 3945 3946
 *
 * 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
3947 3948 3949 3950 3951 3952
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
3953
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
3954 3955
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
3956
	struct scsi_cmnd *cmd;
3957
	unsigned long flags;
3958
	struct lpfc_fast_path_event *fast_path_evt;
3959
	struct Scsi_Host *shost;
3960
	uint32_t logit = LOG_FCP;
已提交
3961

3962
	atomic_inc(&phba->fc4ScsiIoCmpls);
3963

3964 3965
	/* Sanity check on return of outstanding command */
	cmd = lpfc_cmd->pCmd;
3966 3967
	if (!cmd)
		return;
3968 3969
	shost = cmd->device->host;

3970
	lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
已提交
3971
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
3972 3973 3974
	/* pick up SLI4 exhange busy status from HBA */
	lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;

3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005
#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
4006

已提交
4007 4008 4009 4010 4011 4012
	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;
4013 4014 4015 4016
		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))
4017 4018 4019 4020
			logit = 0;
		else
			logit = LOG_FCP | LOG_FCP_UNDER;
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
H
Hannes Reinecke 已提交
4021
			 "9030 FCP cmd x%x failed <%d/%lld> "
4022 4023 4024
			 "status: x%x result: x%x "
			 "sid: x%x did: x%x oxid: x%x "
			 "Data: x%x x%x\n",
4025 4026 4027 4028
			 cmd->cmnd[0],
			 cmd->device ? cmd->device->id : 0xffff,
			 cmd->device ? cmd->device->lun : 0xffff,
			 lpfc_cmd->status, lpfc_cmd->result,
4029 4030
			 vport->fc_myDID,
			 (pnode) ? pnode->nlp_DID : 0,
4031 4032
			 phba->sli_rev == LPFC_SLI_REV4 ?
			     lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4033 4034
			 pIocbOut->iocb.ulpContext,
			 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
已提交
4035 4036 4037 4038

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
4039
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
4040 4041 4042
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
4043
			cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
			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
4068
			break;
4069
		case IOSTAT_LOCAL_REJECT:
4070
		case IOSTAT_REMOTE_STOP:
4071 4072 4073 4074 4075 4076
			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) {
4077
				cmd->result = DID_NO_CONNECT << 16;
4078 4079
				break;
			}
4080
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4081
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
4082 4083
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4084
				cmd->result = DID_REQUEUE << 16;
4085
				break;
4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101
			}
			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 "
4102
							"on unprotected cmd\n");
4103 4104
				}
			}
4105 4106 4107 4108 4109 4110 4111 4112
			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,
4113 4114
					lpfc_cmd->cur_iocbq.sli4_lxritag,
					0, 0);
4115
			}
4116
		/* else: fall through */
已提交
4117
		default:
4118
			cmd->result = DID_ERROR << 16;
已提交
4119 4120 4121
			break;
		}

4122
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4123
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4124 4125
			cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
				      SAM_STAT_BUSY;
4126
	} else
4127
		cmd->result = DID_OK << 16;
已提交
4128 4129 4130 4131

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

4132
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
H
Hannes Reinecke 已提交
4133
				 "0710 Iodone <%d/%llu> cmd %p, error "
4134 4135 4136 4137
				 "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
4138 4139
	}

4140
	lpfc_update_stats(phba, lpfc_cmd);
4141 4142 4143
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4144
		spin_lock_irqsave(shost->host_lock, flags);
4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156
		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;
		}
4157
		spin_unlock_irqrestore(shost->host_lock, flags);
4158
	}
4159
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4160

4161 4162 4163
	/* If pCmd was set to NULL from abort path, do not call scsi_done */
	if (xchg(&lpfc_cmd->pCmd, NULL) == NULL) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4164
				 "5688 FCP cmd already NULL, sid: 0x%06x, "
4165 4166 4167 4168 4169 4170 4171
				 "did: 0x%06x, oxid: 0x%04x\n",
				 vport->fc_myDID,
				 (pnode) ? pnode->nlp_DID : 0,
				 phba->sli_rev == LPFC_SLI_REV4 ?
				 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff);
		return;
	}
4172

4173 4174 4175
	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	cmd->scsi_done(cmd);

4176 4177 4178 4179
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
4180
	spin_lock_irqsave(shost->host_lock, flags);
4181 4182
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
4183
	spin_unlock_irqrestore(shost->host_lock, flags);
4184

4185
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4186 4187
}

4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205
/**
 * 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]);
	}
}

4206
/**
4207
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4208 4209 4210 4211 4212
 * @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
4213
 * to transfer for device with SLI3 interface spec.
4214
 **/
已提交
4215
static void
4216
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
4217
		    struct lpfc_nodelist *pnode)
已提交
4218
{
J
James Smart 已提交
4219
	struct lpfc_hba *phba = vport->phba;
已提交
4220 4221 4222 4223 4224
	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;
4225 4226
	uint8_t *ptr;
	bool sli4;
4227
	uint32_t fcpdl;
已提交
4228

4229 4230 4231
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
4232
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4233 4234
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
4235

4236 4237
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
4238

4239 4240 4241 4242 4243 4244 4245
	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));
	}

4246
	fcp_cmnd->fcpCntl1 = SIMPLE_Q;
已提交
4247

4248
	sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4249
	piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4250

已提交
4251 4252 4253 4254 4255 4256
	/*
	 * 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.
	 */
4257
	if (scsi_sg_count(scsi_cmnd)) {
已提交
4258 4259
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4260
			iocb_cmd->ulpPU = PARM_READ_CHECK;
4261 4262
			if (vport->cfg_first_burst_size &&
			    (pnode->nlp_flag & NLP_FIRSTBURST)) {
4263 4264 4265 4266 4267 4268
				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;
4269
			}
已提交
4270
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
4271
			atomic_inc(&phba->fc4ScsiOutputRequests);
已提交
4272 4273 4274 4275
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			fcp_cmnd->fcpCntl3 = READ_DATA;
4276
			atomic_inc(&phba->fc4ScsiInputRequests);
已提交
4277 4278 4279 4280 4281 4282
		}
	} else {
		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
		iocb_cmd->un.fcpi.fcpi_parm = 0;
		iocb_cmd->ulpPU = 0;
		fcp_cmnd->fcpCntl3 = 0;
4283
		atomic_inc(&phba->fc4ScsiControlRequests);
已提交
4284
	}
4285 4286 4287
	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
4288 4289 4290 4291 4292
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
4293
	if (sli4)
4294 4295
		piocbq->iocb.ulpContext =
		  phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
已提交
4296 4297
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
4298 4299
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
4300 4301 4302 4303 4304

	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
4305
	piocbq->vport = vport;
已提交
4306 4307
}

4308
/**
4309
 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4310 4311 4312 4313 4314
 * @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.
 *
4315 4316
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
4317 4318 4319 4320 4321
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
4322
static int
4323
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
4324
			     struct lpfc_scsi_buf *lpfc_cmd,
H
Hannes Reinecke 已提交
4325
			     uint64_t lun,
已提交
4326 4327 4328 4329 4330
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
4331
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
4332 4333
	struct lpfc_nodelist *ndlp = rdata->pnode;

4334 4335
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
4336 4337 4338
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
4339 4340
	piocbq->vport = vport;

已提交
4341 4342 4343
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
4344 4345 4346
	/* 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
4347
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4348 4349
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4350
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
4351 4352
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
4353 4354 4355 4356
	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
		piocb->ulpContext =
		  vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
	}
4357
	piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
已提交
4358
	piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4359 4360
	piocb->ulpPU = 0;
	piocb->un.fcpi.fcpi_parm = 0;
已提交
4361 4362 4363 4364 4365 4366 4367 4368

	/* 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;
4369
	} else
已提交
4370
		piocb->ulpTimeout = lpfc_cmd->timeout;
4371

4372 4373
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4374

4375
	return 1;
4376 4377 4378
}

/**
L
Lucas De Marchi 已提交
4379
 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390
 * @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)
{

4391 4392 4393
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;

4394 4395 4396 4397
	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;
4398
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4399
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4400
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4401
		break;
4402 4403 4404
	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;
4405
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4406
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4407
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4408
		break;
4409 4410 4411 4412 4413 4414 4415 4416
	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;
4417
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4418 4419 4420
	return 0;
}

4421
/**
4422
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4423 4424 4425 4426 4427 4428 4429
 * @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.
 **/
4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441
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;
}

4442
/**
4443
 * lpfc_info - Info entry point of scsi_host_template data structure
4444 4445 4446 4447 4448 4449 4450
 * @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
4451 4452 4453
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
4454 4455
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4456
	int len, link_speed = 0;
已提交
4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475
	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);
		}
4476
		len = strlen(lpfcinfobuf);
4477
		link_speed = lpfc_sli_port_speed_get(phba);
4478 4479 4480
		if (link_speed != 0)
			snprintf(lpfcinfobuf + len, 384-len,
				 " Logical Link Speed: %d Mbps", link_speed);
已提交
4481 4482 4483 4484
	}
	return lpfcinfobuf;
}

4485
/**
4486
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4487 4488 4489 4490 4491
 * @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.
 **/
4492 4493 4494 4495 4496
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

4497
	if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
4498 4499 4500 4501
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

4502
/**
4503
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4504 4505 4506 4507
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
4508 4509 4510 4511 4512
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

4513
/**
4514
 * lpfc_poll_timeout - Restart polling timer
4515 4516 4517 4518 4519 4520
 * @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.
 **/

4521
void lpfc_poll_timeout(struct timer_list *t)
4522
{
4523
	struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
4524 4525

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4526
		lpfc_sli_handle_fast_ring_event(phba,
4527
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4528

4529 4530 4531 4532 4533
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

4534
/**
4535
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546
 * @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
4547
static int
4548
lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
已提交
4549
{
J
James Smart 已提交
4550 4551
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4552
	struct lpfc_rport_data *rdata;
4553
	struct lpfc_nodelist *ndlp;
4554
	struct lpfc_scsi_buf *lpfc_cmd;
4555 4556
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
4557

4558
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
4559 4560 4561 4562 4563

	/* sanity check on references */
	if (unlikely(!rdata) || unlikely(!rport))
		goto out_fail_command;

4564 4565 4566
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
4567 4568
		goto out_fail_command;
	}
4569
	ndlp = rdata->pnode;
已提交
4570

4571
	if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4572
		(!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4573

4574 4575 4576 4577
		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",
4578 4579 4580 4581 4582
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
4583
	/*
4584 4585
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
4586
	 */
4587 4588
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
		goto out_tgt_busy;
4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617
	if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
		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]);
			goto out_tgt_busy;
		}
4618
	}
4619

4620
	lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
已提交
4621
	if (lpfc_cmd == NULL) {
4622
		lpfc_rampdown_queue_depth(phba);
4623

4624
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
4625 4626
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
4627 4628 4629 4630 4631 4632 4633 4634 4635
		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;
4636
	lpfc_cmd->ndlp = ndlp;
已提交
4637
	lpfc_cmd->timeout = 0;
4638
	lpfc_cmd->start_time = jiffies;
已提交
4639 4640
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;

4641
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4642
		if (vport->phba->cfg_enable_bg) {
4643 4644
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4645 4646 4647 4648 4649 4650 4651
					 "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));
4652
		}
4653 4654
		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
4655
		if (vport->phba->cfg_enable_bg) {
4656 4657
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4658 4659 4660 4661
					 "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),
4662
					 blk_rq_sectors(cmnd->request),
4663
					 (cmnd->cmnd[1]>>5));
4664
		}
4665 4666 4667
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
4668 4669 4670
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
4671
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
4672

4673
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4674
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4675
	if (err) {
4676 4677
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "3376 FCP could not issue IOCB err %x"
H
Hannes Reinecke 已提交
4678
				 "FCP cmd x%x <%d/%llu> "
4679 4680 4681 4682
				 "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
4683
				 cmnd->device ? cmnd->device->lun : (u64) -1,
4684 4685 4686 4687 4688 4689 4690 4691 4692
				 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));

4693 4694 4695 4696 4697 4698 4699 4700 4701 4702
		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
4703
		goto out_host_busy_free_buf;
4704
	}
4705
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4706
		lpfc_sli_handle_fast_ring_event(phba,
4707
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4708

4709 4710 4711 4712
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
4713 4714 4715
	return 0;

 out_host_busy_free_buf:
4716
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4717
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4718 4719 4720
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

4721 4722 4723
 out_tgt_busy:
	return SCSI_MLQUEUE_TARGET_BUSY;

已提交
4724
 out_fail_command:
4725
	cmnd->scsi_done(cmnd);
已提交
4726 4727 4728
	return 0;
}

J
Jeff Garzik 已提交
4729

4730
/**
4731
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4732 4733 4734 4735 4736 4737 4738 4739
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
4740
static int
4741
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
4742
{
J
James Smart 已提交
4743 4744 4745
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4746 4747
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
4748 4749
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
4750
	int ret = SUCCESS, status = 0;
4751
	struct lpfc_sli_ring *pring_s4 = NULL;
4752
	int ret_val;
4753
	unsigned long flags;
4754
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
4755

4756
	status = fc_block_scsi_eh(cmnd);
4757
	if (status != 0 && status != SUCCESS)
4758
		return status;
4759

4760
	spin_lock_irqsave(&phba->hbalock, flags);
4761 4762
	/* driver queued commands are in process of being flushed */
	if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4763
		spin_unlock_irqrestore(&phba->hbalock, flags);
4764 4765 4766 4767 4768 4769
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3168 SCSI Layer abort requested I/O has been "
			"flushed by LLD.\n");
		return FAILED;
	}

4770
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4771
	if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4772
		spin_unlock_irqrestore(&phba->hbalock, flags);
J
James Smart 已提交
4773 4774
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
H
Hannes Reinecke 已提交
4775
			 "x%x ID %d LUN %llu\n",
4776
			 SUCCESS, cmnd->device->id, cmnd->device->lun);
J
James Smart 已提交
4777 4778
		return SUCCESS;
	}
已提交
4779

4780
	iocb = &lpfc_cmd->cur_iocbq;
4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795
	if (phba->sli_rev == LPFC_SLI_REV4) {
		if (!(phba->cfg_fof) ||
		    (!(iocb->iocb_flag & LPFC_IO_FOF))) {
			pring_s4 =
				phba->sli4_hba.fcp_wq[iocb->hba_wqidx]->pring;
		} else {
			iocb->hba_wqidx = 0;
			pring_s4 = phba->sli4_hba.oas_wq->pring;
		}
		if (!pring_s4) {
			ret = FAILED;
			goto out_unlock;
		}
		spin_lock(&pring_s4->ring_lock);
	}
4796 4797
	/* the command is in process of being cancelled */
	if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4798 4799
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock(&pring_s4->ring_lock);
4800
		spin_unlock_irqrestore(&phba->hbalock, flags);
4801 4802 4803 4804 4805
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3169 SCSI Layer abort requested I/O has been "
			"cancelled by LLD.\n");
		return FAILED;
	}
4806 4807 4808 4809
	/*
	 * 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
4810
	 * see the completion before the eh fired. Just return SUCCESS.
4811
	 */
4812
	if (lpfc_cmd->pCmd != cmnd) {
4813 4814
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock(&pring_s4->ring_lock);
4815 4816 4817 4818 4819
		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
4820

4821
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
4822

4823 4824 4825 4826
	/* 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");
4827 4828
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock(&pring_s4->ring_lock);
4829 4830 4831 4832
		spin_unlock_irqrestore(&phba->hbalock, flags);
		goto wait_for_cmpl;
	}

4833
	abtsiocb = __lpfc_sli_get_iocbq(phba);
4834 4835
	if (abtsiocb == NULL) {
		ret = FAILED;
4836 4837
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock(&pring_s4->ring_lock);
4838
		goto out_unlock;
已提交
4839 4840
	}

4841 4842 4843
	/* Indicate the IO is being aborted by the driver. */
	iocb->iocb_flag |= LPFC_DRIVER_ABORTED;

已提交
4844
	/*
4845 4846 4847
	 * 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
4848 4849
	 */

4850 4851 4852 4853
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
4854 4855 4856 4857
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
4858

4859 4860
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
4861 4862

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
4863
	abtsiocb->hba_wqidx = iocb->hba_wqidx;
4864
	abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4865 4866
	if (iocb->iocb_flag & LPFC_IO_FOF)
		abtsiocb->iocb_flag |= LPFC_IO_FOF;
4867

J
James Smart 已提交
4868
	if (lpfc_is_link_up(phba))
4869 4870 4871
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
4872

4873
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
4874
	abtsiocb->vport = vport;
4875
	lpfc_cmd->waitq = &waitq;
4876 4877 4878 4879
	if (phba->sli_rev == LPFC_SLI_REV4) {
		/* Note: both hbalock and ring_lock must be set here */
		ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno,
						abtsiocb, 0);
4880
		spin_unlock(&pring_s4->ring_lock);
4881 4882 4883 4884
	} else {
		ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
						abtsiocb, 0);
	}
4885
	/* no longer need the lock after this point */
4886
	spin_unlock_irqrestore(&phba->hbalock, flags);
4887

4888 4889

	if (ret_val == IOCB_ERROR) {
4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_lock_irqsave(&pring_s4->ring_lock, flags);
		else
			spin_lock_irqsave(&phba->hbalock, flags);
		/* Indicate the IO is not being aborted by the driver. */
		iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
		lpfc_cmd->waitq = NULL;
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock_irqrestore(&pring_s4->ring_lock, flags);
		else
			spin_unlock_irqrestore(&phba->hbalock, flags);
4901 4902 4903 4904
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
4905

4906
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4907
		lpfc_sli_handle_fast_ring_event(phba,
4908
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
4909

4910
wait_for_cmpl:
4911
	/* Wait for abort to complete */
4912 4913
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
4914
			   msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4915 4916

	spin_lock_irqsave(shost->host_lock, flags);
4917
	lpfc_cmd->waitq = NULL;
4918
	spin_unlock_irqrestore(shost->host_lock, flags);
已提交
4919

4920 4921
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
4922 4923
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
4924
				 "for aborting I/O (xri:x%x) to complete: "
H
Hannes Reinecke 已提交
4925
				 "ret %#x, ID %d, LUN %llu\n",
4926 4927
				 iocb->sli4_xritag, ret,
				 cmnd->device->id, cmnd->device->lun);
已提交
4928
	}
4929
	goto out;
已提交
4930

4931
out_unlock:
4932
	spin_unlock_irqrestore(&phba->hbalock, flags);
4933
out:
4934 4935
	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
4936
			 "LUN %llu\n", ret, cmnd->device->id,
4937
			 cmnd->device->lun);
4938
	return ret;
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
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";
	}
}

4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030

/**
 * 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;
}


5031
/**
5032 5033 5034 5035 5036 5037
 * 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
5038
 *
5039 5040
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
5041
 *
5042 5043 5044
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
5045
 **/
已提交
5046
static int
5047 5048 5049
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
5050
{
J
James Smart 已提交
5051
	struct lpfc_hba   *phba = vport->phba;
5052
	struct lpfc_scsi_buf *lpfc_cmd;
5053 5054
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
5055 5056
	struct lpfc_rport_data *rdata;
	struct lpfc_nodelist *pnode;
5057
	int ret;
5058
	int status;
已提交
5059

5060 5061
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
	if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
5062
		return FAILED;
5063
	pnode = rdata->pnode;
5064

5065
	lpfc_cmd = lpfc_get_scsi_buf(phba, pnode);
已提交
5066
	if (lpfc_cmd == NULL)
5067
		return FAILED;
5068
	lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5069
	lpfc_cmd->rdata = rdata;
5070
	lpfc_cmd->pCmd = cmnd;
5071
	lpfc_cmd->ndlp = pnode;
已提交
5072

5073 5074
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
5075 5076 5077 5078
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
5079

5080
	iocbq = &lpfc_cmd->cur_iocbq;
5081
	iocbqrsp = lpfc_sli_get_iocbq(phba);
5082 5083 5084 5085
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
5086
	iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5087

5088
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
H
Hannes Reinecke 已提交
5089
			 "0702 Issue %s to TGT %d LUN %llu "
5090
			 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5091
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5092 5093
			 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
			 iocbq->iocb_flag);
5094

5095
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5096
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
5097 5098
	if ((status != IOCB_SUCCESS) ||
	    (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5099 5100 5101 5102 5103 5104 5105 5106 5107 5108
		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);
5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122
		/* 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
5123 5124
		ret = SUCCESS;

5125
	lpfc_sli_release_iocbq(phba, iocbqrsp);
5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147

	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)
{
5148
	struct lpfc_rport_data *rdata;
5149
	struct lpfc_nodelist *pnode;
5150 5151
	unsigned long later;

5152
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5153 5154 5155 5156 5157 5158
	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;
5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169
	/*
	 * 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));
5170
		rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205
		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);
5206
	if (cnt)
5207
		lpfc_sli_abort_taskmgmt(vport,
5208
					&phba->sli.sli3_ring[LPFC_FCP_RING],
5209
					tgt_id, lun_id, context);
5210 5211 5212
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5213
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
5214 5215
	}
	if (cnt) {
5216
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5217 5218 5219 5220 5221 5222
			"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
5223
	}
5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242
	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;
5243
	struct lpfc_rport_data *rdata;
5244
	struct lpfc_nodelist *pnode;
5245
	unsigned tgt_id = cmnd->device->id;
H
Hannes Reinecke 已提交
5246
	uint64_t lun_id = cmnd->device->lun;
5247
	struct lpfc_scsi_event_header scsi_event;
5248
	int status;
5249

5250
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5251
	if (!rdata || !rdata->pnode) {
5252
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5253 5254
				 "0798 Device Reset rport failure: rdata x%p\n",
				 rdata);
5255 5256 5257
		return FAILED;
	}
	pnode = rdata->pnode;
5258
	status = fc_block_scsi_eh(cmnd);
5259
	if (status != 0 && status != SUCCESS)
5260
		return status;
5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277

	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);

5278
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5279 5280 5281
						FCP_LUN_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
H
Hannes Reinecke 已提交
5282
			 "0713 SCSI layer issued Device Reset (%d, %llu) "
5283 5284 5285 5286 5287 5288 5289 5290
			 "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.
	 */
5291 5292
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5293
						LPFC_CTX_LUN);
5294 5295

	return status;
5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313
}

/**
 * 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;
5314
	struct lpfc_rport_data *rdata;
5315
	struct lpfc_nodelist *pnode;
5316
	unsigned tgt_id = cmnd->device->id;
H
Hannes Reinecke 已提交
5317
	uint64_t lun_id = cmnd->device->lun;
5318
	struct lpfc_scsi_event_header scsi_event;
5319
	int status;
5320

5321
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5322 5323 5324 5325 5326 5327
	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;
5328
	status = fc_block_scsi_eh(cmnd);
5329
	if (status != 0 && status != SUCCESS)
5330
		return status;
5331 5332 5333 5334 5335

	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);
5336 5337 5338 5339 5340 5341
		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);
		}
5342 5343 5344
		lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					  LPFC_CTX_TGT);
		return FAST_IO_FAIL;
5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355
	}

	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);

5356
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5357 5358 5359
					FCP_TARGET_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
H
Hannes Reinecke 已提交
5360
			 "0723 SCSI layer issued Target Reset (%d, %llu) "
5361 5362 5363 5364 5365 5366 5367 5368
			 "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.
	 */
5369 5370
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5371
					  LPFC_CTX_TGT);
5372
	return status;
已提交
5373 5374
}

5375
/**
5376
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5377 5378
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
5379 5380
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
5381
 *
5382 5383 5384
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
5385
 **/
5386
static int
5387
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
5388
{
J
James Smart 已提交
5389 5390
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
5391
	struct lpfc_nodelist *ndlp = NULL;
5392
	struct lpfc_scsi_event_header scsi_event;
5393 5394
	int match;
	int ret = SUCCESS, status, i;
5395 5396 5397 5398 5399 5400 5401

	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));

5402 5403
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
5404

5405
	status = fc_block_scsi_eh(cmnd);
5406
	if (status != 0 && status != SUCCESS)
5407
		return status;
5408

已提交
5409 5410 5411 5412 5413
	/*
	 * 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.
	 */
5414
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
5415
		/* Search for mapped node by target ID */
已提交
5416
		match = 0;
J
James Smart 已提交
5417 5418
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5419 5420
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
5421 5422 5423
			if (vport->phba->cfg_fcp2_no_tgt_reset &&
			    (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
				continue;
5424
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5425
			    ndlp->nlp_sid == i &&
5426 5427
			    ndlp->rport &&
			    ndlp->nlp_type & NLP_FCP_TARGET) {
已提交
5428 5429 5430 5431
				match = 1;
				break;
			}
		}
J
James Smart 已提交
5432
		spin_unlock_irq(shost->host_lock);
已提交
5433 5434
		if (!match)
			continue;
5435

5436
		status = lpfc_send_taskmgmt(vport, cmnd,
5437 5438 5439
					i, 0, FCP_TARGET_RESET);

		if (status != SUCCESS) {
5440 5441 5442
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
5443
			ret = FAILED;
已提交
5444 5445
		}
	}
5446
	/*
5447 5448 5449 5450
	 * 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.
5451
	 */
5452 5453 5454

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
5455
		ret = FAILED;
5456

5457 5458
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
5459 5460 5461
	return ret;
}

5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485
/**
 * 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;

5486 5487 5488
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "3172 SCSI layer issued Host Reset Data:\n");

5489
	lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5490 5491 5492 5493
	lpfc_offline(phba);
	rc = lpfc_sli_brdrestart(phba);
	if (rc)
		ret = FAILED;
5494 5495 5496
	rc = lpfc_online(phba);
	if (rc)
		ret = FAILED;
5497 5498
	lpfc_unblock_mgmt_io(phba);

5499 5500 5501 5502 5503
	if (ret == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "3323 Failed host reset, bring it offline\n");
		lpfc_sli4_offline_eratt(phba);
	}
5504 5505 5506
	return ret;
}

5507
/**
5508
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519
 * @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
5520 5521 5522
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
5523 5524
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5525
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5526
	uint32_t total = 0;
已提交
5527
	uint32_t num_to_alloc = 0;
5528
	int num_allocated = 0;
5529
	uint32_t sdev_cnt;
5530 5531 5532
	struct lpfc_device_data *device_data;
	unsigned long flags;
	struct lpfc_name target_wwpn;
已提交
5533

5534
	if (!rport || fc_remote_port_chkready(rport))
已提交
5535 5536
		return -ENXIO;

5537
	if (phba->cfg_fof) {
5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555

		/*
		 * 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,
5556 5557 5558
							sdev->lun,
							phba->cfg_XLanePriority,
							true);
5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570
			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;
	}
5571
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
已提交
5572 5573 5574 5575

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
5576 5577 5578
	 * 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
5579 5580
	 */
	total = phba->total_scsi_bufs;
5581
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
5582

5583 5584 5585 5586
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

5587 5588
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5589 5590 5591
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
5592
		return 0;
5593 5594 5595
	/* 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 ) {
5596 5597 5598 5599 5600 5601
		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
5602 5603
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
5604 5605
	num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
	if (num_to_alloc != num_allocated) {
5606 5607 5608 5609 5610
			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
5611
	}
5612 5613
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
已提交
5614 5615 5616
	return 0;
}

5617
/**
5618
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
5619 5620 5621 5622 5623 5624 5625 5626 5627
 * @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
5628 5629 5630
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
5631 5632
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
5633

5634
	scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
已提交
5635

5636
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5637
		lpfc_sli_handle_fast_ring_event(phba,
5638
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5639 5640 5641 5642
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
5643 5644 5645
	return 0;
}

5646
/**
5647
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5648 5649 5650 5651
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
5652 5653 5654
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
5655 5656
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5657 5658 5659
	unsigned long flags;
	struct lpfc_device_data *device_data = sdev->hostdata;

5660
	atomic_dec(&phba->sdev_cnt);
5661
	if ((phba->cfg_fof) && (device_data)) {
5662 5663 5664 5665 5666 5667
		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
5668 5669 5670 5671
	sdev->hostdata = NULL;
	return;
}

5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692
/**
 * 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,
5693
			uint32_t pri, bool atomic_create)
5694 5695 5696 5697 5698 5699
{

	struct lpfc_device_data *lun_info;
	int memory_flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
5700
	    !(phba->cfg_fof))
5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719
		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;
5720
	lun_info->priority = pri;
5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738
	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  ||
5739
	    !(phba->cfg_fof))
5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772
		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 ||
5773
	    !phba->cfg_fof)
5774 5775 5776 5777 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 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821
		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,
5822 5823
		       uint32_t *found_lun_status,
		       uint32_t *found_lun_pri)
5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835
{

	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) ||
5836
	    !phba->cfg_fof)
5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869
		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;
5870
				*found_lun_pri = lun_info->priority;
5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 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
				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,
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 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;
5932
		lun_info->priority = pri;
5933 5934 5935 5936 5937 5938
		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,
5939
					   pri, false);
5940 5941
	if (lun_info) {
		lun_info->oas_enabled = true;
5942
		lun_info->priority = pri;
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
		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,
5973
		     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
5974 5975 5976 5977 5978 5979
{

	struct lpfc_device_data *lun_info;
	unsigned long flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
5980
	    !phba->cfg_fof)
5981 5982 5983 5984 5985 5986 5987 5988 5989 5990
		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;
5991
		lun_info->priority = pri;
5992 5993 5994 5995 5996 5997 5998 5999 6000
		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;
}
6001

6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043
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,
};

6044
struct scsi_host_template lpfc_template_no_hr = {
6045 6046
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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James Smart 已提交
6047
	.proc_name		= LPFC_DRIVER_NAME,
6048 6049
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
6050
	.eh_timed_out		= fc_eh_timed_out,
6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069
	.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,
};

已提交
6070 6071 6072
struct scsi_host_template lpfc_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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6073
	.proc_name		= LPFC_DRIVER_NAME,
已提交
6074 6075
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
6076
	.eh_timed_out		= fc_eh_timed_out,
已提交
6077
	.eh_abort_handler	= lpfc_abort_handler,
6078 6079
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
6080
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
6081
	.eh_host_reset_handler  = lpfc_host_reset_handler,
已提交
6082 6083 6084
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
6085
	.scan_finished		= lpfc_scan_finished,
已提交
6086
	.this_id		= -1,
6087
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
6088 6089
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
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	.shost_attrs		= lpfc_hba_attrs,
6091
	.max_sectors		= 0xFFFF,
6092
	.vendor_id		= LPFC_NL_VENDOR_ID,
6093
	.change_queue_depth	= scsi_change_queue_depth,
6094
	.track_queue_depth	= 1,
已提交
6095
};
6096 6097 6098 6099

struct scsi_host_template lpfc_vport_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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James Smart 已提交
6100
	.proc_name		= LPFC_DRIVER_NAME,
6101 6102
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
6103
	.eh_timed_out		= fc_eh_timed_out,
6104
	.eh_abort_handler	= lpfc_abort_handler,
6105 6106
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
6107 6108 6109 6110 6111
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
6112
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
6113 6114 6115 6116
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
6117
	.change_queue_depth	= scsi_change_queue_depth,
6118
	.track_queue_depth	= 1,
6119
};