lpfc_scsi.c 108.0 KB
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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) 2004-2009 Emulex.  All rights reserved.           *
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 * EMULEX and SLI are trademarks of Emulex.                        *
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 * www.emulex.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>
#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <asm/unaligned.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_scsi.h"
#include "lpfc.h"
#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;

static char *dif_op_str[] = {
	"SCSI_PROT_NORMAL",
	"SCSI_PROT_READ_INSERT",
	"SCSI_PROT_WRITE_STRIP",
	"SCSI_PROT_READ_STRIP",
	"SCSI_PROT_WRITE_INSERT",
	"SCSI_PROT_READ_PASS",
	"SCSI_PROT_WRITE_PASS",
};
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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
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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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/**
 * 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 ||
		!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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 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
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 * @phba: Pointer to HBA context object.
 * @vport: Pointer to vport object.
 * @ndlp: Pointer to FC node associated with the target.
 * @lun: Lun number of the scsi device.
 * @old_val: Old value of the queue depth.
 * @new_val: New value of the queue depth.
 *
 * This function sends an event to the mgmt application indicating
 * there is a change in the scsi device queue depth.
 **/
static void
lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
		struct lpfc_vport  *vport,
		struct lpfc_nodelist *ndlp,
		uint32_t lun,
		uint32_t old_val,
		uint32_t new_val)
{
	struct lpfc_fast_path_event *fast_path_evt;
	unsigned long flags;

	fast_path_evt = lpfc_alloc_fast_evt(phba);
	if (!fast_path_evt)
		return;

	fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
		FC_REG_SCSI_EVENT;
	fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
		LPFC_EVENT_VARQUEDEPTH;

	/* Report all luns with change in queue depth */
	fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
		memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
			&ndlp->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
			&ndlp->nlp_nodename, sizeof(struct lpfc_name));
	}

	fast_path_evt->un.queue_depth_evt.oldval = old_val;
	fast_path_evt->un.queue_depth_evt.newval = new_val;
	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);

	return;
}

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/**
 * lpfc_change_queue_depth - Alter scsi device queue depth
 * @sdev: Pointer the scsi device on which to change the queue depth.
 * @qdepth: New queue depth to set the sdev to.
 * @reason: The reason for the queue depth change.
 *
 * This function is called by the midlayer and the LLD to alter the queue
 * depth for a scsi device. This function sets the queue depth to the new
 * value and sends an event out to log the queue depth change.
 **/
int
lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	struct lpfc_rport_data *rdata;
	unsigned long new_queue_depth, old_queue_depth;

	old_queue_depth = sdev->queue_depth;
	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
	new_queue_depth = sdev->queue_depth;
	rdata = sdev->hostdata;
	if (rdata)
		lpfc_send_sdev_queuedepth_change_event(phba, vport,
						       rdata->pnode, sdev->lun,
						       old_queue_depth,
						       new_queue_depth);
	return sdev->queue_depth;
}

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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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	spin_lock_irqsave(&phba->hbalock, flags);
	atomic_inc(&phba->num_rsrc_err);
	phba->last_rsrc_error_time = jiffies;

	if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
		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_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
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 * @phba: The Hba for which this call is being executed.
 *
 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 * post at most 1 event every 5 minute after last_ramp_up_time or
 * last_rsrc_error_time.  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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static inline void
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lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
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			uint32_t queue_depth)
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{
	unsigned long flags;
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	struct lpfc_hba *phba = vport->phba;
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	uint32_t evt_posted;
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	atomic_inc(&phba->num_cmd_success);

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	if (vport->cfg_lun_queue_depth <= queue_depth)
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		return;
	spin_lock_irqsave(&phba->hbalock, flags);
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	if (time_before(jiffies,
			phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
	    time_before(jiffies,
			phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
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		spin_unlock_irqrestore(&phba->hbalock, flags);
		return;
	}
	phba->last_ramp_up_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_UP_QUEUE;
	if (!evt_posted)
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		phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);

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

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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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	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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				lpfc_change_queue_depth(sdev, new_queue_depth,
							SCSI_QDEPTH_DEFAULT);
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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_ramp_up_queue_handler - WORKER_RAMP_UP_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_UP_QUEUE event for worker
 * thread.This routine increases queue depth for all scsi device on each vport
 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 * num_cmd_success to zero.
 **/
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void
lpfc_ramp_up_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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	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) {
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				if (vports[i]->cfg_lun_queue_depth <=
				    sdev->queue_depth)
					continue;
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				lpfc_change_queue_depth(sdev,
							sdev->queue_depth+1,
							SCSI_QDEPTH_RAMP_UP);
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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;
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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.
		 */
		psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
					GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}

		/* Initialize virtual ptrs to dma_buf region. */
		memset(psb->data, 0, phba->cfg_sg_dma_buf_size);

		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
					psb->data, psb->dma_handle);
			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;
			/* fill in responce BDE */
			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;
598 599
		/* Put it back into the SCSI buffer list */
		lpfc_release_scsi_buf_s4(phba, psb);
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601
	}
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603
	return bcnt;
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}

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/**
 * 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);
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;

	spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, iflag);
	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);
			psb->status = IOSTAT_SUCCESS;
			spin_unlock_irqrestore(
				&phba->sli4_hba.abts_scsi_buf_list_lock,
				iflag);
			lpfc_release_scsi_buf_s4(phba, psb);
			return;
		}
	}
	spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
				iflag);
}

/**
 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine walks the list of scsi buffers that have been allocated and
 * repost them to the HBA 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)
{
	struct lpfc_scsi_buf *psb;
	int index, status, bcnt = 0, rcnt = 0, rc = 0;
	LIST_HEAD(sblist);

	for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
		psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
		if (psb) {
			/* Remove from SCSI buffer list */
			list_del(&psb->list);
			/* Add it to a local SCSI buffer list */
			list_add_tail(&psb->list, &sblist);
			if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
				bcnt = rcnt;
				rcnt = 0;
			}
		} else
			/* A hole present in the XRI array, need to skip */
			bcnt = rcnt;

		if (index == phba->sli4_hba.scsi_xri_cnt - 1)
			/* End of XRI array for SCSI buffer, complete */
			bcnt = rcnt;

		/* Continue until collect up to a nembed page worth of sgls */
		if (bcnt == 0)
			continue;
		/* Now, post the SCSI buffer list sgls as a block */
		status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
		/* Reset SCSI buffer count for next round of posting */
		bcnt = 0;
		while (!list_empty(&sblist)) {
			list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
					 list);
			if (status) {
				/* Put this back on the abort scsi list */
				psb->status = IOSTAT_LOCAL_REJECT;
				psb->result = IOERR_ABORT_REQUESTED;
				rc++;
			} else
				psb->status = IOSTAT_SUCCESS;
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
		}
	}
	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.
 *
 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
 * the scsi buffer contains all the necessary information needed to initiate
 * a SCSI I/O.
 *
 * Return codes:
 *   int - number of scsi buffers that were allocated.
 *   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;
	dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
	uint16_t iotag, last_xritag = NO_XRI;
	int status = 0, index;
	int bcnt;
	int non_sequential_xri = 0;
	int rc = 0;
	LIST_HEAD(sblist);

	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;

		/*
		 * 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.
		 */
		psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
						GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}

		/* Initialize virtual ptrs to dma_buf region. */
		memset(psb->data, 0, phba->cfg_sg_dma_buf_size);

		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
			kfree(psb);
			break;
		}

		psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
		if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}
		if (last_xritag != NO_XRI
			&& psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
			non_sequential_xri = 1;
		} else
			list_add_tail(&psb->list, &sblist);
		last_xritag = psb->cur_iocbq.sli4_xritag;

		index = phba->sli4_hba.scsi_xri_cnt++;
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;

		psb->fcp_bpl = psb->data;
		psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
			- (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
		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;
		pdma_phys_fcp_cmd =
			(psb->dma_handle + phba->cfg_sg_dma_buf_size)
			 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
		pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);

		/*
		 * 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.
		 */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
		bf_set(lpfc_sli4_sge_len, sgl, sizeof(struct fcp_cmnd));
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
		sgl->word3 = cpu_to_le32(sgl->word3);
		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));
		bf_set(lpfc_sli4_sge_len, sgl, sizeof(struct fcp_rsp));
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
		sgl->word3 = cpu_to_le32(sgl->word3);

		/*
		 * 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;
		if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
			pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
		else
			pdma_phys_bpl1 = 0;
		psb->dma_phys_bpl = pdma_phys_bpl;
		phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
		if (non_sequential_xri) {
			status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
						pdma_phys_bpl1,
						psb->cur_iocbq.sli4_xritag);
			if (status) {
				/* Put this back on the abort scsi list */
				psb->status = IOSTAT_LOCAL_REJECT;
				psb->result = IOERR_ABORT_REQUESTED;
				rc++;
			} else
				psb->status = IOSTAT_SUCCESS;
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
			break;
		}
	}
	if (bcnt) {
		status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
		/* Reset SCSI buffer count for next round of posting */
		while (!list_empty(&sblist)) {
			list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
				 list);
			if (status) {
				/* Put this back on the abort scsi list */
				psb->status = IOSTAT_LOCAL_REJECT;
				psb->result = IOERR_ABORT_REQUESTED;
				rc++;
			} else
				psb->status = IOSTAT_SUCCESS;
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
		}
	}

	return bcnt + non_sequential_xri - rc;
}

871
/**
872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
 * 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);
}

/**
 * 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.
892 893 894 895 896 897 898 899
 *
 * 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
 **/
900
static struct lpfc_scsi_buf*
901
lpfc_get_scsi_buf(struct lpfc_hba * phba)
已提交
902
{
903 904
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
905
	unsigned long iflag = 0;
906

907
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
908
	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
909 910 911
	if (lpfc_cmd) {
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
912
		lpfc_cmd->prot_seg_cnt = 0;
913
	}
914
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
915 916
	return  lpfc_cmd;
}
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917

918
/**
919
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
920 921 922 923 924 925
 * @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.
 **/
926
static void
927
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
928
{
929
	unsigned long iflag = 0;
已提交
930

931
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
932
	psb->pCmd = NULL;
已提交
933
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
934
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
已提交
935 936
}

937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
/**
 * 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;

	if (psb->status == IOSTAT_LOCAL_REJECT
		&& psb->result == IOERR_ABORT_REQUESTED) {
		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 {

		spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
		psb->pCmd = NULL;
		list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
		spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
	}
}

970
/**
971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986
 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list.
 **/
static void
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{

	phba->lpfc_release_scsi_buf(phba, psb);
}

/**
 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
987 988 989 990
 * @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
991 992 993
 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
 * through sg elements and format the bdea. This routine also initializes all
 * IOCB fields which are dependent on scsi command request buffer.
994 995 996 997 998
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
999
static int
1000
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1001 1002 1003 1004 1005 1006
{
	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;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1007
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1008
	dma_addr_t physaddr;
1009
	uint32_t num_bde = 0;
1010
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1011 1012 1013 1014 1015 1016 1017 1018

	/*
	 * 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;
1019
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1020 1021 1022 1023 1024 1025 1026
		/*
		 * 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.
		 */

1027 1028 1029 1030 1031
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1032
		lpfc_cmd->seg_cnt = nseg;
已提交
1033
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1034 1035
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1036
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1037
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1038
			       lpfc_cmd->seg_cnt);
1039
			scsi_dma_unmap(scsi_cmnd);
已提交
1040 1041 1042 1043 1044 1045 1046 1047
			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.
1048 1049 1050
		 * 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
1051
		 */
1052
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1053
			physaddr = sg_dma_address(sgel);
1054
			if (phba->sli_rev == 3 &&
1055
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
			    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
1072
		}
1073
	}
已提交
1074 1075 1076

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1077 1078 1079
	 * 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
1080
	 */
1081 1082
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
		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);
			/* ebde count includes the responce bde and data bpl */
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
			/* ebde count includes the responce bde and data bdes */
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
	}
1108
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1109 1110 1111 1112 1113

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1114
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1115 1116 1117 1118 1119 1120 1121 1122
	return 0;
}

/*
 * Given a scsi cmnd, determine the BlockGuard profile to be used
 * with the cmd
 */
static int
1123
lpfc_sc_to_sli_prof(struct lpfc_hba *phba, struct scsi_cmnd *sc)
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
{
	uint8_t guard_type = scsi_host_get_guard(sc->device->host);
	uint8_t ret_prof = LPFC_PROF_INVALID;

	if (guard_type == SHOST_DIX_GUARD_IP) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			ret_prof = LPFC_PROF_AST2;
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			ret_prof = LPFC_PROF_A1;
			break;

1140 1141
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1142 1143 1144 1145 1146
			ret_prof = LPFC_PROF_AST1;
			break;

		case SCSI_PROT_NORMAL:
		default:
1147 1148
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9063 BLKGRD:Bad op/guard:%d/%d combination\n",
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
					scsi_get_prot_op(sc), guard_type);
			break;

		}
	} else if (guard_type == SHOST_DIX_GUARD_CRC) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			ret_prof = LPFC_PROF_A1;
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
			ret_prof = LPFC_PROF_C1;
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
		case SCSI_PROT_NORMAL:
		default:
1169 1170
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
					scsi_get_prot_op(sc), guard_type);
			break;
		}
	} else {
		/* unsupported format */
		BUG();
	}

	return ret_prof;
}

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

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

/**
 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
 * @sc:             in: SCSI command
1197 1198 1199
 * @apptagmask:     out: app tag mask
 * @apptagval:      out: app tag value
 * @reftag:         out: ref tag (reference tag)
1200 1201
 *
 * Description:
1202 1203
 *   Extract DIF parameters from the command if possible.  Otherwise,
 *   use default parameters.
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
 *
 **/
static inline void
lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
		uint16_t *apptagval, uint32_t *reftag)
{
	struct  scsi_dif_tuple *spt;
	unsigned char op = scsi_get_prot_op(sc);
	unsigned int protcnt = scsi_prot_sg_count(sc);
	static int cnt;

	if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1216
				op == SCSI_PROT_WRITE_PASS)) {
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271

		cnt++;
		spt = page_address(sg_page(scsi_prot_sglist(sc))) +
			scsi_prot_sglist(sc)[0].offset;
		*apptagmask = 0;
		*apptagval = 0;
		*reftag = cpu_to_be32(spt->ref_tag);

	} else {
		/* SBC defines ref tag to be lower 32bits of LBA */
		*reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
		*apptagmask = 0;
		*apptagval = 0;
	}
}

/*
 * This function sets up 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  -->     |          PDE_1          |
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 * @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
 *
 * Note: Data s/g buffers have been dma mapped
 */
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 */
	struct lpfc_pde *pde1 = NULL;
	dma_addr_t physaddr;
	int i = 0, num_bde = 0;
	int datadir = sc->sc_data_direction;
	int prof = LPFC_PROF_INVALID;
	unsigned blksize;
	uint32_t reftag;
	uint16_t apptagmask, apptagval;

	pde1 = (struct lpfc_pde *) bpl;
1272
	prof = lpfc_sc_to_sli_prof(phba, sc);
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371

	if (prof == LPFC_PROF_INVALID)
		goto out;

	/* extract some info from the scsi command for PDE1*/
	blksize = lpfc_cmd_blksize(sc);
	lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);

	/* setup PDE1 with what we have */
	lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize,
			BG_EC_STOP_ERR);
	lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag);

	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;
}

/*
 * This function sets up buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF_BUF
 *
 * 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  -->   |          PDE_1          |
 *                                    +-------------------------+
 *                                    |      PDE_3 (Prot BDE)   |
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
 *   start of new  prot group  -->    |          PDE_1          |
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * @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
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
 */
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 */
	struct lpfc_pde *pde1 = NULL;
	struct ulp_bde64 *prot_bde = NULL;
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
	unsigned int split_offset, protgroup_len;
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
	int prof = LPFC_PROF_INVALID;
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
	uint32_t reftag;
	uint16_t apptagmask, apptagval;
	int num_bde = 0;

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

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
				sgpe, sgde);
		return 0;
	}

1372
	prof = lpfc_sc_to_sli_prof(phba, sc);
1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
	if (prof == LPFC_PROF_INVALID)
		goto out;

	/* extract some info from the scsi command for PDE1*/
	blksize = lpfc_cmd_blksize(sc);
	lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);

	split_offset = 0;
	do {
		/* setup the first PDE_1 */
		pde1 = (struct lpfc_pde *) bpl;

		lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize,
				BG_EC_STOP_ERR);
		lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag);

		num_bde++;
		bpl++;

		/* setup the first BDE that points to protection buffer */
		prot_bde = (struct ulp_bde64 *) bpl;
		protphysaddr = sg_dma_address(sgpe);
		prot_bde->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
		prot_bde->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
		protgroup_len = sg_dma_len(sgpe);


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

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

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

		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) {
			if (!sgde) {
1421 1422
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9065 BLKGRD:%s Invalid data segment\n",
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475
						__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);
		}

		/* 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 */
1476 1477
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9054 BLKGRD: bug in %s\n", __func__);
1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558
		}

	} while (!alldone);

out:


	return num_bde;
}
/*
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
 * Returns:
 *			      for DIF (for both read and write)
 * */
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:
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9021 Unsupported protection op:%d\n", op);
		break;
	}

	return ret;
}

/*
 * 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(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 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;
	int diflen, fcpdl;
	unsigned blksize;

	/*
	 * 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;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1559 1560 1561 1562
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9067 BLKGRD: %s: Too many sg segments"
					" from dma_map_sg.  Config %d, seg_cnt"
					" %d\n",
1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
					__func__, phba->cfg_sg_seg_cnt,
					lpfc_cmd->seg_cnt);
			scsi_dma_unmap(scsi_cmnd);
			return 1;
		}

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
			/* we shoud have 2 or more entries in buffer list */
			if (num_bde < 2)
				goto err;
			break;
		case LPFC_PG_TYPE_DIF_BUF:{
			/*
			 * 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;
			if (lpfc_cmd->prot_seg_cnt
			    > phba->cfg_prot_sg_seg_cnt) {
1596 1597 1598
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9068 BLKGRD: %s: Too many prot sg "
					"segments from dma_map_sg.  Config %d,"
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
						"prot_seg_cnt %d\n", __func__,
						phba->cfg_prot_sg_seg_cnt,
						lpfc_cmd->prot_seg_cnt);
				dma_unmap_sg(&phba->pcidev->dev,
					     scsi_prot_sglist(scsi_cmnd),
					     scsi_prot_sg_count(scsi_cmnd),
					     datadir);
				scsi_dma_unmap(scsi_cmnd);
				return 1;
			}

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
			/* we shoud have 3 or more entries in buffer list */
			if (num_bde < 3)
				goto err;
			break;
		}
		case LPFC_PG_TYPE_INVALID:
		default:
			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;

	fcpdl = scsi_bufflen(scsi_cmnd);

	if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
		/*
		 * We are in DIF Type 1 mode
		 * Every data block has a 8 byte DIF (trailer)
		 * attached to it.  Must ajust FCP data length
		 */
		blksize = lpfc_cmd_blksize(scsi_cmnd);
		diflen = (fcpdl / blksize) * 8;
		fcpdl += diflen;
	}
	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
1657
	return 0;
1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688
err:
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
			"9023 Could not setup all needed BDE's"
			"prot_group_type=%d, num_bde=%d\n",
			prot_group_type, num_bde);
	return 1;
}

/*
 * 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;

1689 1690
	lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
			" 0x%x lba 0x%llx blk cnt 0x%x "
1691
			"bgstat=0x%x bghm=0x%x\n",
1692
			cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1693
			blk_rq_sectors(cmd->request), bgstat, bghm);
1694 1695 1696

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
1697 1698
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
1699
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1700
		lpfc_debug_save_data(phba, cmd);
1701 1702 1703 1704

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
1705 1706 1707 1708
			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);
1709 1710 1711 1712 1713 1714 1715 1716
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1717 1718 1719
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
			" BlockGuard profile. bgstat:0x%x\n",
			bgstat);
1720 1721 1722 1723 1724 1725
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1726 1727
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
				"Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
				bgstat);
		ret = (-1);
		goto out;
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x1);
M
Martin K. Petersen 已提交
1738
		cmd->result = DRIVER_SENSE << 24
1739 1740
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
1741 1742
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9055 BLKGRD: guard_tag error\n");
1743 1744 1745 1746 1747 1748 1749
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x3);
M
Martin K. Petersen 已提交
1750
		cmd->result = DRIVER_SENSE << 24
1751 1752 1753
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
1754 1755
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9056 BLKGRD: ref_tag error\n");
1756 1757 1758 1759 1760 1761 1762
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x2);
M
Martin K. Petersen 已提交
1763
		cmd->result = DRIVER_SENSE << 24
1764 1765 1766
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
1767 1768
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9061 BLKGRD: app_tag error\n");
1769 1770 1771 1772 1773 1774 1775 1776 1777
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
		 * field, and put the failing LBA in it
		 */
		cmd->sense_buffer[8] = 0;     /* Information */
		cmd->sense_buffer[9] = 0xa;   /* Add. length */
1778
		bghm /= cmd->device->sector_size;
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788

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

		put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
		cmd->result = ScsiResult(DID_ERROR, 0);
1789 1790
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9057 BLKGRD: no errors reported!\n");
1791 1792 1793 1794
	}

out:
	return ret;
已提交
1795 1796
}

1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
/**
 * 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:
 * 	1 - Error
 * 	0 - Success
 **/
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;
	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;

	/*
	 * 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);
		if (unlikely(!nseg))
			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 = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1849 1850 1851 1852
			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,
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906
			       lpfc_cmd->seg_cnt);
			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);
			bf_set(lpfc_sli4_sge_len, sgl, sg_dma_len(sgel));
			sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
			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);
			sgl->word2 = cpu_to_le32(sgl->word2);
			sgl->word3 = cpu_to_le32(sgl->word3);
			dma_offset += dma_len;
			sgl++;
		}
	} else {
		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
	}

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

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

1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924
/**
 * 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:
 * 	1 - Error
 * 	0 - Success
 **/
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);
}

1925
/**
1926
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
 * @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;

	/* 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;
}
2016 2017

/**
2018
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2019
 * @phba: The HBA for which this call is being executed.
2020 2021 2022
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
2023
 * field of @lpfc_cmd for device with SLI-3 interface spec.
2024
 **/
2025
static void
2026
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2027 2028 2029 2030 2031 2032 2033
{
	/*
	 * 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.
	 */
2034 2035
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
2036 2037 2038 2039
	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);
2040 2041
}

2042
/**
2043
 * lpfc_handler_fcp_err - FCP response handler
2044 2045 2046 2047 2048 2049 2050 2051
 * @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
2052
static void
J
James Smart 已提交
2053 2054
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
2055 2056 2057 2058
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2059
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
2060 2061
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
2062
	uint32_t *lp;
已提交
2063 2064
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
2065
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
2066

2067

已提交
2068 2069 2070 2071 2072 2073 2074 2075 2076 2077
	/*
	 *  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;
	}

2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
		if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
		    (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2719 Invalid response length: "
				 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 rsplen);
			host_status = DID_ERROR;
			goto out;
		}
	}

2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106
	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;

	if (!scsi_status && (resp_info & RESID_UNDER))
		logit = LOG_FCP;

2107
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
2108
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2109 2110 2111 2112 2113 2114 2115
			 "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
2116

2117
	scsi_set_resid(cmnd, 0);
已提交
2118
	if (resp_info & RESID_UNDER) {
2119
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
2120

2121
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2122
				 "9025 FCP Read Underrun, expected %d, "
2123 2124 2125 2126
				 "residual %d Data: x%x x%x x%x\n",
				 be32_to_cpu(fcpcmd->fcpDl),
				 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
				 cmnd->underflow);
已提交
2127

2128 2129 2130 2131 2132 2133 2134
		/*
		 * If there is an under run check if under run reported by
		 * storage array is same as the under run reported by HBA.
		 * If this is not same, there is a dropped frame.
		 */
		if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
			fcpi_parm &&
2135
			(scsi_get_resid(cmnd) != fcpi_parm)) {
2136 2137
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
2138
					 "9026 FCP Read Check Error "
2139 2140 2141 2142
					 "and Underrun Data: x%x x%x x%x x%x\n",
					 be32_to_cpu(fcpcmd->fcpDl),
					 scsi_get_resid(cmnd), fcpi_parm,
					 cmnd->cmnd[0]);
2143
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2144 2145
			host_status = DID_ERROR;
		}
已提交
2146 2147 2148 2149 2150 2151 2152 2153
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
		 * be transfered for this command.  Provided a sense condition
		 * 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) &&
2154 2155
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
2156
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2157
					 "9027 FCP command x%x residual "
2158 2159
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
2160
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
2161
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
2162 2163 2164
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
2165
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2166
				 "9028 FCP command x%x residual overrun error. "
2167
				 "Data: x%x x%x\n", cmnd->cmnd[0],
2168
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
2169 2170 2171 2172 2173 2174 2175 2176
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
	 * (fcpi_parm should be zero). Apply check only to reads.
	 */
	} else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
			(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2177
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2178
				 "9029 FCP Read Check Error Data: "
2179 2180 2181 2182
				 "x%x x%x x%x x%x\n",
				 be32_to_cpu(fcpcmd->fcpDl),
				 be32_to_cpu(fcprsp->rspResId),
				 fcpi_parm, cmnd->cmnd[0]);
已提交
2183
		host_status = DID_ERROR;
2184
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
2185 2186 2187 2188
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
2189
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
2190 2191
}

2192
/**
2193
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2194 2195
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2196
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2197 2198 2199 2200 2201
 *
 * 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
2202 2203 2204 2205 2206 2207
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
2208
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
2209 2210 2211
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2212
	int result;
2213
	struct scsi_device *tmp_sdev;
2214
	int depth;
2215
	unsigned long flags;
2216
	struct lpfc_fast_path_event *fast_path_evt;
2217 2218
	struct Scsi_Host *shost = cmd->device->host;
	uint32_t queue_depth, scsi_id;
已提交
2219 2220 2221

	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2222 2223
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
2224 2225 2226 2227 2228 2229 2230 2231

	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;

2232
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2233
				 "9030 FCP cmd x%x failed <%d/%d> "
2234 2235 2236 2237 2238 2239 2240
				 "status: x%x result: x%x Data: x%x x%x\n",
				 cmd->cmnd[0],
				 cmd->device ? cmd->device->id : 0xffff,
				 cmd->device ? cmd->device->lun : 0xffff,
				 lpfc_cmd->status, lpfc_cmd->result,
				 pIocbOut->iocb.ulpContext,
				 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
已提交
2241 2242 2243 2244

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
2245
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
2246 2247 2248
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
2249
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
			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
2274
			break;
2275
		case IOSTAT_LOCAL_REJECT:
2276
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2277
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
2278
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
2279
				cmd->result = ScsiResult(DID_REQUEUE, 0);
2280
				break;
2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297
			}

			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 "
2298
							"on unprotected cmd\n");
2299 2300 2301 2302
				}
			}

		/* else: fall through */
已提交
2303 2304 2305 2306 2307
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

2308
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2309
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2310 2311
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
已提交
2312 2313 2314 2315 2316 2317 2318
	} else {
		cmd->result = ScsiResult(DID_OK, 0);
	}

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

2319 2320 2321 2322 2323 2324
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0710 Iodone <%d/%d> cmd %p, error "
				 "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
2325 2326
	}

2327
	lpfc_update_stats(phba, lpfc_cmd);
2328
	result = cmd->result;
2329 2330 2331
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2332
		spin_lock_irqsave(shost->host_lock, flags);
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344
		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;
		}
2345
		spin_unlock_irqrestore(shost->host_lock, flags);
2346 2347
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
		if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
2348
		   time_after(jiffies, pnode->last_change_time +
2349
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2350
			spin_lock_irqsave(shost->host_lock, flags);
2351 2352 2353 2354 2355
			pnode->cmd_qdepth += pnode->cmd_qdepth *
				LPFC_TGTQ_RAMPUP_PCENT / 100;
			if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
				pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
			pnode->last_change_time = jiffies;
2356
			spin_unlock_irqrestore(shost->host_lock, flags);
2357
		}
2358 2359
	}

2360
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2361 2362 2363 2364

	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	queue_depth = cmd->device->queue_depth;
	scsi_id = cmd->device->id;
2365 2366
	cmd->scsi_done(cmd);

2367
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2368 2369 2370 2371
		/*
		 * If there is a thread waiting for command completion
		 * wake up the thread.
		 */
2372
		spin_lock_irqsave(shost->host_lock, flags);
2373
		lpfc_cmd->pCmd = NULL;
2374 2375
		if (lpfc_cmd->waitq)
			wake_up(lpfc_cmd->waitq);
2376
		spin_unlock_irqrestore(shost->host_lock, flags);
2377 2378 2379 2380
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

2381
	if (!result)
2382
		lpfc_rampup_queue_depth(vport, queue_depth);
2383

2384 2385 2386 2387
	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
2388 2389
	if (result == SAM_STAT_TASK_SET_FULL && pnode &&
	    NLP_CHK_NODE_ACT(pnode)) {
2390 2391
		shost_for_each_device(tmp_sdev, shost) {
			if (tmp_sdev->id != scsi_id)
2392 2393
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
2394 2395 2396
						      tmp_sdev->queue_depth-1);
			if (depth <= 0)
				continue;
2397 2398 2399
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
					 "0711 detected queue full - lun queue "
					 "depth adjusted to %d.\n", depth);
2400
			lpfc_send_sdev_queuedepth_change_event(phba, vport,
2401 2402 2403
							       pnode,
							       tmp_sdev->lun,
							       depth+1, depth);
2404 2405 2406
		}
	}

2407 2408 2409 2410
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
2411
	spin_lock_irqsave(shost->host_lock, flags);
2412
	lpfc_cmd->pCmd = NULL;
2413 2414
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
2415
	spin_unlock_irqrestore(shost->host_lock, flags);
2416

2417
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2418 2419
}

2420
/**
2421
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
 * @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]);
	}
}

2438
/**
2439
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2440 2441 2442 2443 2444
 * @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
2445
 * to transfer for device with SLI3 interface spec.
2446
 **/
已提交
2447
static void
2448
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
2449
		    struct lpfc_nodelist *pnode)
已提交
2450
{
J
James Smart 已提交
2451
	struct lpfc_hba *phba = vport->phba;
已提交
2452 2453 2454 2455 2456
	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;
2457
	char tag[2];
已提交
2458

2459 2460 2461
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
2462
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2463 2464
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
2465

2466 2467
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
2468 2469 2470

	memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);

2471 2472
	if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
		switch (tag[0]) {
已提交
2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
		case HEAD_OF_QUEUE_TAG:
			fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
			break;
		case ORDERED_QUEUE_TAG:
			fcp_cmnd->fcpCntl1 = ORDERED_Q;
			break;
		default:
			fcp_cmnd->fcpCntl1 = SIMPLE_Q;
			break;
		}
	} else
		fcp_cmnd->fcpCntl1 = 0;

	/*
	 * 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.
	 */
2492
	if (scsi_sg_count(scsi_cmnd)) {
已提交
2493 2494
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2495 2496 2497 2498 2499
			if (phba->sli_rev < LPFC_SLI_REV4) {
				iocb_cmd->un.fcpi.fcpi_parm = 0;
				iocb_cmd->ulpPU = 0;
			} else
				iocb_cmd->ulpPU = PARM_READ_CHECK;
已提交
2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
			phba->fc4OutputRequests++;
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			fcp_cmnd->fcpCntl3 = READ_DATA;
			phba->fc4InputRequests++;
		}
	} else {
		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
		iocb_cmd->un.fcpi.fcpi_parm = 0;
		iocb_cmd->ulpPU = 0;
		fcp_cmnd->fcpCntl3 = 0;
		phba->fc4ControlRequests++;
	}
2515 2516
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2517
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2518 2519 2520 2521 2522 2523 2524
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
2525 2526
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
2527 2528 2529 2530 2531

	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
2532
	piocbq->vport = vport;
已提交
2533 2534
}

2535
/**
2536
 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2537 2538 2539 2540 2541
 * @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.
 *
2542 2543
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
2544 2545 2546 2547 2548
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
2549
static int
2550
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
2551
			     struct lpfc_scsi_buf *lpfc_cmd,
2552
			     unsigned int lun,
已提交
2553 2554 2555 2556 2557
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
2558
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
2559 2560
	struct lpfc_nodelist *ndlp = rdata->pnode;

2561 2562
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
2563 2564 2565
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
2566 2567
	piocbq->vport = vport;

已提交
2568 2569 2570
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
2571 2572 2573
	/* 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
2574
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2575 2576
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2577
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
	if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
		piocb->ulpFCP2Rcvy = 1;
	}
	piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);

	/* 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;
2592
	} else
已提交
2593
		piocb->ulpTimeout = lpfc_cmd->timeout;
2594

2595 2596
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2597

2598
	return 1;
2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613
}

/**
 * lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
 * @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)
{

2614 2615 2616 2617
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
	phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;

2618 2619 2620 2621 2622 2623
	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;
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
		break;
2624 2625 2626 2627 2628
	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;
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
		break;
2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
	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_get_scsi_buf = lpfc_get_scsi_buf;
	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
	return 0;
}

2641
/**
2642
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2643 2644 2645 2646 2647 2648 2649
 * @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.
 **/
2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661
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;
}

2662
/**
2663
 * lpfc_info - Info entry point of scsi_host_template data structure
2664 2665 2666 2667 2668 2669 2670
 * @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
2671 2672 2673
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
2674 2675
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699
	int len;
	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);
		}
	}
	return lpfcinfobuf;
}

2700
/**
2701
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2702 2703 2704 2705 2706
 * @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.
 **/
2707 2708 2709 2710 2711 2712 2713 2714 2715 2716
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

	if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

2717
/**
2718
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2719 2720 2721 2722
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
2723 2724 2725 2726 2727
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

2728
/**
2729
 * lpfc_poll_timeout - Restart polling timer
2730 2731 2732 2733 2734 2735
 * @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.
 **/

2736 2737
void lpfc_poll_timeout(unsigned long ptr)
{
J
James Smart 已提交
2738
	struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2739 2740

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2741 2742 2743
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

2744 2745 2746 2747 2748
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

2749
/**
2750
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761
 * @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
2762 2763 2764
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
J
James Smart 已提交
2765 2766 2767
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2768 2769
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *ndlp = rdata->pnode;
2770
	struct lpfc_scsi_buf *lpfc_cmd;
2771 2772
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
2773

2774 2775 2776
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
2777 2778 2779
		goto out_fail_command;
	}

2780 2781 2782
	if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
		scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {

2783 2784 2785 2786
		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",
2787 2788 2789 2790 2791
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
2792
	/*
2793 2794
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
2795
	 */
2796 2797 2798 2799
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
		cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
		goto out_fail_command;
	}
2800 2801
	if (vport->cfg_max_scsicmpl_time &&
		(atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth))
2802
		goto out_host_busy;
2803

2804
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
2805
	if (lpfc_cmd == NULL) {
2806
		lpfc_rampdown_queue_depth(phba);
2807

2808 2809 2810
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
2811 2812 2813 2814 2815 2816 2817 2818 2819 2820
		goto out_host_busy;
	}

	/*
	 * Store the midlayer's command structure for the completion phase
	 * and complete the command initialization.
	 */
	lpfc_cmd->pCmd  = cmnd;
	lpfc_cmd->rdata = rdata;
	lpfc_cmd->timeout = 0;
2821
	lpfc_cmd->start_time = jiffies;
已提交
2822 2823 2824
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
	cmnd->scsi_done = done;

2825
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2826 2827
		if (vport->phba->cfg_enable_bg) {
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2828 2829 2830 2831
				"9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
				"str=%s\n",
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
2832
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2833
				"9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
2834
				"%02x %02x %02x %02x %02x\n",
2835 2836 2837 2838
				cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
				cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
				cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
				cmnd->cmnd[9]);
2839 2840
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2841
					"9035 BLKGRD: READ @ sector %llu, "
2842 2843 2844
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
					blk_rq_sectors(cmnd->request));
2845 2846
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2847
					"9036 BLKGRD: WRITE @ sector %llu, "
2848
					"count %u cmd=%p\n",
2849
					(unsigned long long)scsi_get_lba(cmnd),
2850
					blk_rq_sectors(cmnd->request),
2851
					cmnd);
2852
		}
2853 2854 2855

		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
2856
		if (vport->phba->cfg_enable_bg) {
2857
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874
					"9038 BLKGRD: rcvd unprotected cmd:"
					"%02x op:%02x str=%s\n",
					cmnd->cmnd[0], scsi_get_prot_op(cmnd),
					dif_op_str[scsi_get_prot_op(cmnd)]);
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9039 BLKGRD: CDB: %02x %02x %02x "
					"%02x %02x %02x %02x %02x %02x %02x\n",
					cmnd->cmnd[0], cmnd->cmnd[1],
					cmnd->cmnd[2], cmnd->cmnd[3],
					cmnd->cmnd[4], cmnd->cmnd[5],
					cmnd->cmnd[6], cmnd->cmnd[7],
					cmnd->cmnd[8], cmnd->cmnd[9]);
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9040 dbg: READ @ sector %llu, "
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
2875
					 blk_rq_sectors(cmnd->request));
2876 2877
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2878
					 "9041 dbg: WRITE @ sector %llu, "
2879
					 "count %u cmd=%p\n",
2880
					 (unsigned long long)scsi_get_lba(cmnd),
2881
					 blk_rq_sectors(cmnd->request), cmnd);
2882 2883
			else
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2884
					 "9042 dbg: parser not implemented\n");
2885
		}
2886 2887 2888
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
2889 2890 2891
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
2892
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
2893

2894
	atomic_inc(&ndlp->cmd_pending);
2895
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
2896
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
2897 2898
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
已提交
2899
		goto out_host_busy_free_buf;
2900
	}
2901
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2902 2903 2904 2905 2906
		spin_unlock(shost->host_lock);
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

		spin_lock(shost->host_lock);
2907 2908 2909 2910
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
2911 2912 2913
	return 0;

 out_host_busy_free_buf:
2914
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2915
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2916 2917 2918 2919 2920 2921 2922 2923
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

2924
/**
2925
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
2926 2927 2928 2929 2930 2931 2932 2933
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
2934
static int
2935
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
2936
{
J
James Smart 已提交
2937 2938 2939
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
2940 2941
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
2942 2943
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
2944
	int ret = SUCCESS;
2945
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
2946

2947
	fc_block_scsi_eh(cmnd);
2948 2949
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	BUG_ON(!lpfc_cmd);
已提交
2950

2951 2952 2953 2954 2955 2956 2957 2958 2959 2960
	/*
	 * 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
	 * see the completion before the eh fired.  Just return
	 * SUCCESS.
	 */
	iocb = &lpfc_cmd->cur_iocbq;
	if (lpfc_cmd->pCmd != cmnd)
		goto out;
已提交
2961

2962
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
2963

2964 2965 2966
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
2967 2968 2969 2970
		goto out;
	}

	/*
2971 2972 2973
	 * 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
2974 2975
	 */

2976 2977 2978 2979
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
2980 2981 2982 2983
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
2984

2985 2986
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
2987 2988 2989 2990

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
	abtsiocb->fcp_wqidx = iocb->fcp_wqidx;

J
James Smart 已提交
2991
	if (lpfc_is_link_up(phba))
2992 2993 2994
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
2995

2996
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
2997
	abtsiocb->vport = vport;
2998 2999
	if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
	    IOCB_ERROR) {
3000 3001 3002 3003
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
3004

3005
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3006 3007
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3008

3009
	lpfc_cmd->waitq = &waitq;
3010
	/* Wait for abort to complete */
3011 3012 3013
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
			   (2*vport->cfg_devloss_tmo*HZ));
3014

3015 3016 3017
	spin_lock_irq(shost->host_lock);
	lpfc_cmd->waitq = NULL;
	spin_unlock_irq(shost->host_lock);
已提交
3018

3019 3020
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
3021 3022 3023 3024 3025 3026
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
				 "for abort to complete: ret %#x, ID %d, "
				 "LUN %d, snum %#lx\n",
				 ret, cmnd->device->id, cmnd->device->lun,
				 cmnd->serial_number);
已提交
3027 3028 3029
	}

 out:
3030 3031 3032 3033
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
			 "LUN %d snum %#lx\n", ret, cmnd->device->id,
			 cmnd->device->lun, cmnd->serial_number);
3034
	return ret;
3035 3036
}

3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059
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";
	}
}

3060
/**
3061 3062 3063 3064 3065 3066
 * 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
3067
 *
3068 3069
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
3070
 *
3071 3072 3073
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
3074
 **/
已提交
3075
static int
3076 3077 3078
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
		    unsigned  tgt_id, unsigned int lun_id,
		    uint8_t task_mgmt_cmd)
已提交
3079
{
J
James Smart 已提交
3080
	struct lpfc_hba   *phba = vport->phba;
3081
	struct lpfc_scsi_buf *lpfc_cmd;
3082 3083 3084
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
	int ret;
3085
	int status;
已提交
3086

3087
	if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
3088
		return FAILED;
3089

J
James Smart 已提交
3090
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
3091
	if (lpfc_cmd == NULL)
3092
		return FAILED;
已提交
3093
	lpfc_cmd->timeout = 60;
3094
	lpfc_cmd->rdata = rdata;
已提交
3095

3096 3097
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
3098 3099 3100 3101
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
3102

3103
	iocbq = &lpfc_cmd->cur_iocbq;
3104
	iocbqrsp = lpfc_sli_get_iocbq(phba);
3105 3106 3107 3108
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
3109

3110
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3111 3112 3113 3114 3115
			 "0702 Issue %s to TGT %d LUN %d "
			 "rpi x%x nlp_flag x%x\n",
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
			 rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);

3116
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3117
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
3118 3119 3120 3121 3122
	if (status != IOCB_SUCCESS) {
		if (status == IOCB_TIMEDOUT) {
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
			ret = TIMEOUT_ERROR;
		} else
3123
			ret = FAILED;
3124 3125 3126 3127 3128
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
			 lpfc_taskmgmt_name(task_mgmt_cmd),
			 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3129
			 iocbqrsp->iocb.un.ulpWord[4]);
3130 3131 3132
	} else
		ret = SUCCESS;

3133
	lpfc_sli_release_iocbq(phba, iocbqrsp);
3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206

	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)
{
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	unsigned long later;

	/*
	 * 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));
		rdata = cmnd->device->hostdata;
		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);
3207
	if (cnt)
3208
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3209
				    tgt_id, lun_id, context);
3210 3211 3212
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3213
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
3214 3215
	}
	if (cnt) {
3216
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3217 3218 3219 3220 3221 3222
			"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
3223
	}
3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249
	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;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3250
	fc_block_scsi_eh(cmnd);
3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308

	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);

	status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
						FCP_LUN_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0713 SCSI layer issued Device Reset (%d, %d) "
			 "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.
	 */
	status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
						LPFC_CTX_LUN);
	return status;
}

/**
 * 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;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3309
	fc_block_scsi_eh(cmnd);
3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342

	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);
		return FAILED;
	}

	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);

	status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
					FCP_TARGET_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0723 SCSI layer issued Target Reset (%d, %d) "
			 "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.
	 */
	status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					LPFC_CTX_TGT);
	return status;
已提交
3343 3344
}

3345
/**
3346
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3347 3348
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
3349 3350
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
3351
 *
3352 3353 3354
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
3355
 **/
3356
static int
3357
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
3358
{
J
James Smart 已提交
3359 3360
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
3361
	struct lpfc_nodelist *ndlp = NULL;
3362
	struct lpfc_scsi_event_header scsi_event;
3363 3364
	int match;
	int ret = SUCCESS, status, i;
3365 3366 3367 3368 3369 3370 3371

	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));

3372 3373
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
3374

3375
	fc_block_scsi_eh(cmnd);
3376

已提交
3377 3378 3379 3380 3381
	/*
	 * 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.
	 */
3382
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
3383
		/* Search for mapped node by target ID */
已提交
3384
		match = 0;
J
James Smart 已提交
3385 3386
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3387 3388
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
3389
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3390
			    ndlp->nlp_sid == i &&
3391
			    ndlp->rport) {
已提交
3392 3393 3394 3395
				match = 1;
				break;
			}
		}
J
James Smart 已提交
3396
		spin_unlock_irq(shost->host_lock);
已提交
3397 3398
		if (!match)
			continue;
3399 3400 3401 3402 3403

		status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
					i, 0, FCP_TARGET_RESET);

		if (status != SUCCESS) {
3404 3405 3406
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
3407
			ret = FAILED;
已提交
3408 3409
		}
	}
3410
	/*
3411 3412 3413 3414
	 * 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.
3415
	 */
3416 3417 3418

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
3419
		ret = FAILED;
3420

3421 3422
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
3423 3424 3425
	return ret;
}

3426
/**
3427
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438
 * @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
3439 3440 3441
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
3442 3443
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3444
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3445
	uint32_t total = 0;
已提交
3446
	uint32_t num_to_alloc = 0;
3447
	int num_allocated = 0;
已提交
3448

3449
	if (!rport || fc_remote_port_chkready(rport))
已提交
3450 3451
		return -ENXIO;

3452
	sdev->hostdata = rport->dd_data;
已提交
3453 3454 3455 3456

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
3457 3458 3459
	 * 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
3460 3461
	 */
	total = phba->total_scsi_bufs;
3462
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
3463 3464 3465

	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3466 3467 3468
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
3469
		return 0;
3470 3471 3472
	/* 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 ) {
3473 3474 3475 3476 3477 3478
		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
3479 3480
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
3481 3482 3483 3484 3485 3486 3487
	num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
	if (num_to_alloc != num_allocated) {
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0708 Allocation request of %d "
				 "command buffers did not succeed.  "
				 "Allocated %d buffers.\n",
				 num_to_alloc, num_allocated);
已提交
3488 3489 3490 3491
	}
	return 0;
}

3492
/**
3493
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3494 3495 3496 3497 3498 3499 3500 3501 3502 3503
 * @sdev: Pointer to scsi_device.
 *
 * This routine configures following items
 *   - Tag command queuing support for @sdev if supported.
 *   - Dev loss time out value of fc_rport.
 *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
 *
 * Return codes:
 *   0 - Success
 **/
已提交
3504 3505 3506
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
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James Smart 已提交
3507 3508 3509
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
已提交
3510 3511

	if (sdev->tagged_supported)
3512
		scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3513
	else
3514
		scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
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3515 3516 3517 3518 3519 3520 3521

	/*
	 * Initialize the fc transport attributes for the target
	 * containing this scsi device.  Also note that the driver's
	 * target pointer is stored in the starget_data for the
	 * driver's sysfs entry point functions.
	 */
3522
	rport->dev_loss_tmo = vport->cfg_devloss_tmo;
已提交
3523

3524
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3525 3526
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3527 3528 3529 3530
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3531 3532 3533
	return 0;
}

3534
/**
3535
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3536 3537 3538 3539
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
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static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
	sdev->hostdata = NULL;
	return;
}

3547

已提交
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struct scsi_host_template lpfc_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
	.eh_abort_handler	= lpfc_abort_handler,
3554 3555
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3556
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
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	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
3560
	.scan_finished		= lpfc_scan_finished,
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3561
	.this_id		= -1,
3562
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
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	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
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James Smart 已提交
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	.shost_attrs		= lpfc_hba_attrs,
3566
	.max_sectors		= 0xFFFF,
3567
	.vendor_id		= LPFC_NL_VENDOR_ID,
3568
	.change_queue_depth	= lpfc_change_queue_depth,
已提交
3569
};
3570 3571 3572 3573 3574 3575 3576

struct scsi_host_template lpfc_vport_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
	.eh_abort_handler	= lpfc_abort_handler,
3577 3578
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3579 3580 3581 3582 3583 3584
	.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,
3585
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
3586 3587 3588 3589
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
3590
	.change_queue_depth	= lpfc_change_queue_depth,
3591
};