lpfc_scsi.c 105.2 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",
	"SCSI_PROT_READ_CONVERT",
	"SCSI_PROT_WRITE_CONVERT"
};
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static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
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static void
lpfc_debug_save_data(struct scsi_cmnd *cmnd)
{
	void *src, *dst;
	struct scatterlist *sgde = scsi_sglist(cmnd);

	if (!_dump_buf_data) {
		printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n",
				__func__);
		return;
	}


	if (!sgde) {
		printk(KERN_ERR "BLKGRD ERROR: data scatterlist is null\n");
		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
lpfc_debug_save_dif(struct scsi_cmnd *cmnd)
{
	void *src, *dst;
	struct scatterlist *sgde = scsi_prot_sglist(cmnd);

	if (!_dump_buf_dif) {
		printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n",
				__func__);
		return;
	}

	if (!sgde) {
		printk(KERN_ERR "BLKGRD ERROR: prot scatterlist is null\n");
		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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/**
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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);
	if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
	 ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
		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, old_queue_depth;
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	unsigned long num_rsrc_err, num_cmd_success;
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	int i;
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	struct lpfc_rport_data *rdata;
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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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				old_queue_depth = sdev->queue_depth;
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				if (sdev->ordered_tags)
					scsi_adjust_queue_depth(sdev,
							MSG_ORDERED_TAG,
							new_queue_depth);
				else
					scsi_adjust_queue_depth(sdev,
							MSG_SIMPLE_TAG,
							new_queue_depth);
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				rdata = sdev->hostdata;
				if (rdata)
					lpfc_send_sdev_queuedepth_change_event(
						phba, vports[i],
						rdata->pnode,
						sdev->lun, old_queue_depth,
						new_queue_depth);
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			}
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		}
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	lpfc_destroy_vport_work_array(phba, vports);
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	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

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/**
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 * lpfc_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;
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	struct lpfc_rport_data *rdata;
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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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				if (vports[i]->cfg_lun_queue_depth <=
				    sdev->queue_depth)
					continue;
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				if (sdev->ordered_tags)
					scsi_adjust_queue_depth(sdev,
							MSG_ORDERED_TAG,
							sdev->queue_depth+1);
				else
					scsi_adjust_queue_depth(sdev,
							MSG_SIMPLE_TAG,
							sdev->queue_depth+1);
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				rdata = sdev->hostdata;
				if (rdata)
					lpfc_send_sdev_queuedepth_change_event(
						phba, vports[i],
						rdata->pnode,
						sdev->lun,
						sdev->queue_depth - 1,
						sdev->queue_depth);
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			}
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		}
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	lpfc_destroy_vport_work_array(phba, vports);
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	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

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

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

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/**
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 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
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 * @vport: The virtual port for which this call being executed.
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 * @num_to_allocate: The requested number of buffers to allocate.
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 *
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 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 * the scsi buffer contains all the necessary information needed to initiate
 * a SCSI I/O. The non-DMAable buffer region contains information to build
 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 * and the initial BPL. In addition to allocating memory, the FCP CMND and
 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
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 *
 * Return codes:
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 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
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 **/
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static int
lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
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{
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	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
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	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_bpl;
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	uint16_t iotag;
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	int bcnt;
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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;
593 594
		/* Put it back into the SCSI buffer list */
		lpfc_release_scsi_buf_s4(phba, psb);
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596
	}
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598
	return bcnt;
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599 600
}

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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;
}

866
/**
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
 * 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.
887 888 889 890 891 892 893 894
 *
 * 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
 **/
895
static struct lpfc_scsi_buf*
896
lpfc_get_scsi_buf(struct lpfc_hba * phba)
已提交
897
{
898 899
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
900
	unsigned long iflag = 0;
901

902
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
903
	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
904 905 906
	if (lpfc_cmd) {
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
907
		lpfc_cmd->prot_seg_cnt = 0;
908
	}
909
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
910 911
	return  lpfc_cmd;
}
已提交
912

913
/**
914
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
915 916 917 918 919 920
 * @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.
 **/
921
static void
922
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
923
{
924
	unsigned long iflag = 0;
已提交
925

926
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
927
	psb->pCmd = NULL;
已提交
928
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
929
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
已提交
930 931
}

932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
/**
 * 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);
	}
}

965
/**
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
 * 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
982 983 984 985
 * @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
986 987 988
 * 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.
989 990 991 992 993
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
994
static int
995
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
996 997 998 999 1000 1001
{
	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;
1002
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1003
	dma_addr_t physaddr;
1004
	uint32_t num_bde = 0;
1005
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1006 1007 1008 1009 1010 1011 1012 1013

	/*
	 * 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;
1014
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1015 1016 1017 1018 1019 1020 1021
		/*
		 * 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.
		 */

1022 1023 1024 1025 1026
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1027
		lpfc_cmd->seg_cnt = nseg;
已提交
1028 1029
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
			printk(KERN_ERR "%s: Too many sg segments from "
1030
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1031
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1032
			       lpfc_cmd->seg_cnt);
1033
			scsi_dma_unmap(scsi_cmnd);
已提交
1034 1035 1036 1037 1038 1039 1040 1041
			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.
1042 1043 1044
		 * 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
1045
		 */
1046
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1047
			physaddr = sg_dma_address(sgel);
1048
			if (phba->sli_rev == 3 &&
1049
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065
			    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
1066
		}
1067
	}
已提交
1068 1069 1070

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1071 1072 1073
	 * 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
1074
	 */
1075 1076
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
		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));
	}
1102
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1103 1104 1105 1106 1107

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1108
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
	return 0;
}

/*
 * Given a scsi cmnd, determine the BlockGuard profile to be used
 * with the cmd
 */
static int
lpfc_sc_to_sli_prof(struct scsi_cmnd *sc)
{
	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;

		case SCSI_PROT_READ_CONVERT:
		case SCSI_PROT_WRITE_CONVERT:
			ret_prof = LPFC_PROF_AST1;
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
		case SCSI_PROT_NORMAL:
		default:
			printk(KERN_ERR "Bad op/guard:%d/%d combination\n",
					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_CONVERT:
		case SCSI_PROT_WRITE_CONVERT:
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
		case SCSI_PROT_NORMAL:
		default:
			printk(KERN_ERR "Bad op/guard:%d/%d combination\n",
					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
1193 1194 1195
 * @apptagmask:     out: app tag mask
 * @apptagval:      out: app tag value
 * @reftag:         out: ref tag (reference tag)
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 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 1272 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 1372 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 1421 1422 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 1476 1477 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 1559 1560 1561 1562 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 1596 1597 1598 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
 *
 * Description:
 *   Extract DIF paramters from the command if possible.  Otherwise,
 *   use default paratmers.
 *
 **/
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 ||
				op == SCSI_PROT_WRITE_PASS ||
				op == SCSI_PROT_WRITE_CONVERT)) {

		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;
	prof = lpfc_sc_to_sli_prof(sc);

	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;
	}

	prof = lpfc_sc_to_sli_prof(sc);
	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) {
				printk(KERN_ERR "%s Invalid data segment\n",
						__func__);
				return 0;
			}
			bpl++;
			dataphysaddr = sg_dma_address(sgde) + split_offset;
			bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
			bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));

			remainder = sg_dma_len(sgde) - split_offset;

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

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

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

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

			num_bde++;
			curr_data++;

			if (split_offset)
				break;

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

		/* 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 */
			printk(KERN_ERR "BLKGRD: bug in %s\n", __func__);
		}

	} 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:
	case SCSI_PROT_WRITE_CONVERT:
	case SCSI_PROT_READ_CONVERT:
		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) {
			printk(KERN_ERR "%s: Too many sg segments from "
					"dma_map_sg.  Config %d, seg_cnt %d\n",
					__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) {
				printk(KERN_ERR "%s: Too many prot sg segments "
						"from dma_map_sg.  Config %d,"
						"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
1651
	return 0;
1652 1653 1654 1655 1656 1657 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
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;

1683
	printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%x "
1684
			"bgstat=0x%x bghm=0x%x\n",
1685
			cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1686
			blk_rq_sectors(cmd->request), bgstat, bghm);
1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
		printk(KERN_ERR "Saving Data for %u blocks to debugfs\n",
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
		lpfc_debug_save_data(cmd);

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
			printk(KERN_ERR "Saving DIF for %u blocks to debugfs\n",
					(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
			lpfc_debug_save_dif(cmd);
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
		printk(KERN_ERR "Invalid BlockGuard profile. bgstat:0x%x\n",
				bgstat);
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
		printk(KERN_ERR "Invalid BlockGuard DIF Block. bgstat:0x%x\n",
				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
1727
		cmd->result = DRIVER_SENSE << 24
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
		printk(KERN_ERR "BLKGRD: guard_tag error\n");
	}

	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
1738
		cmd->result = DRIVER_SENSE << 24
1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
		printk(KERN_ERR "BLKGRD: ref_tag error\n");
	}

	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
1750
		cmd->result = DRIVER_SENSE << 24
1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
		printk(KERN_ERR "BLKGRD: app_tag error\n");
	}

	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 */
1764
		bghm /= cmd->device->sector_size;
1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779

		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);
		printk(KERN_ERR "BLKGRD: no errors reported!\n");
	}

out:
	return ret;
已提交
1780 1781
}

1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 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 1849 1850 1851 1852 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
/**
 * 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) {
			printk(KERN_ERR "%s: Too many sg segments from "
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
			       __func__, phba->cfg_sg_seg_cnt,
			       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;
}

1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908
/**
 * 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);
}

1909
/**
1910
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 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
 * @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;
}
2000 2001

/**
2002
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2003
 * @phba: The HBA for which this call is being executed.
2004 2005 2006
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
2007
 * field of @lpfc_cmd for device with SLI-3 interface spec.
2008
 **/
2009
static void
2010
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2011 2012 2013 2014 2015 2016 2017
{
	/*
	 * 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.
	 */
2018 2019
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
2020 2021 2022 2023
	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);
2024 2025
}

2026
/**
2027
 * lpfc_handler_fcp_err - FCP response handler
2028 2029 2030 2031 2032 2033 2034 2035
 * @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
2036
static void
J
James Smart 已提交
2037 2038
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
2039 2040 2041 2042
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2043
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
2044 2045
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
2046
	uint32_t *lp;
已提交
2047 2048
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
2049
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
2050

2051

已提交
2052 2053 2054 2055 2056 2057 2058 2059 2060 2061
	/*
	 *  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;
	}

2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
	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;

2076
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
2077
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2078 2079 2080 2081 2082 2083 2084
			 "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
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094

	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
		if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
		    (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
			host_status = DID_ERROR;
			goto out;
		}
	}

2095
	scsi_set_resid(cmnd, 0);
已提交
2096
	if (resp_info & RESID_UNDER) {
2097
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
2098

2099
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2100
				 "9025 FCP Read Underrun, expected %d, "
2101 2102 2103 2104
				 "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
2105

2106 2107 2108 2109 2110 2111 2112
		/*
		 * 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 &&
2113
			(scsi_get_resid(cmnd) != fcpi_parm)) {
2114 2115
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
2116
					 "9026 FCP Read Check Error "
2117 2118 2119 2120
					 "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]);
2121
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2122 2123
			host_status = DID_ERROR;
		}
已提交
2124 2125 2126 2127 2128 2129 2130 2131
		/*
		 * 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) &&
2132 2133
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
2134
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2135
					 "9027 FCP command x%x residual "
2136 2137
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
2138
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
2139
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
2140 2141 2142
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
2143
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2144
				 "9028 FCP command x%x residual overrun error. "
2145 2146
				 "Data: x%x x%x \n", cmnd->cmnd[0],
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
2147 2148 2149 2150 2151 2152 2153 2154
		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)) {
2155
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2156
				 "9029 FCP Read Check Error Data: "
2157 2158 2159 2160
				 "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
2161
		host_status = DID_ERROR;
2162
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
2163 2164 2165 2166
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
2167
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
2168 2169
}

2170
/**
2171
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2172 2173
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2174
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2175 2176 2177 2178 2179
 *
 * 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
2180 2181 2182 2183 2184 2185
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
2186
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
2187 2188 2189
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
2190
	int result;
2191
	struct scsi_device *tmp_sdev;
2192
	int depth = 0;
2193
	unsigned long flags;
2194
	struct lpfc_fast_path_event *fast_path_evt;
2195 2196
	struct Scsi_Host *shost = cmd->device->host;
	uint32_t queue_depth, scsi_id;
已提交
2197 2198 2199

	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2200 2201
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
2202 2203 2204 2205 2206 2207 2208 2209

	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;

2210
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2211
				 "9030 FCP cmd x%x failed <%d/%d> "
2212 2213 2214 2215 2216 2217 2218
				 "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
2219 2220 2221 2222

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
2223
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
2224 2225 2226
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
2227
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251
			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
2252
			break;
2253
		case IOSTAT_LOCAL_REJECT:
2254
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2255
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
2256
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
2257
				cmd->result = ScsiResult(DID_REQUEUE, 0);
2258
				break;
2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280
			}

			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 "
							"on unprotected cmd");
				}
			}

		/* else: fall through */
已提交
2281 2282 2283 2284 2285
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

2286
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2287
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2288 2289
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
已提交
2290 2291 2292 2293 2294 2295 2296
	} else {
		cmd->result = ScsiResult(DID_OK, 0);
	}

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

2297 2298 2299 2300 2301 2302
		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
2303 2304
	}

2305
	lpfc_update_stats(phba, lpfc_cmd);
2306
	result = cmd->result;
2307 2308 2309
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2310
		spin_lock_irqsave(shost->host_lock, flags);
2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322
		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;
		}
2323
		spin_unlock_irqrestore(shost->host_lock, flags);
2324 2325
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
		if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
2326
		   time_after(jiffies, pnode->last_change_time +
2327
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2328
			spin_lock_irqsave(shost->host_lock, flags);
2329 2330 2331 2332 2333
			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;
2334
			spin_unlock_irqrestore(shost->host_lock, flags);
2335
		}
2336 2337
	}

2338
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2339 2340 2341 2342

	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	queue_depth = cmd->device->queue_depth;
	scsi_id = cmd->device->id;
2343 2344
	cmd->scsi_done(cmd);

2345
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2346 2347 2348 2349
		/*
		 * If there is a thread waiting for command completion
		 * wake up the thread.
		 */
2350
		spin_lock_irqsave(shost->host_lock, flags);
2351
		lpfc_cmd->pCmd = NULL;
2352 2353
		if (lpfc_cmd->waitq)
			wake_up(lpfc_cmd->waitq);
2354
		spin_unlock_irqrestore(shost->host_lock, flags);
2355 2356 2357 2358
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

2359 2360

	if (!result)
2361
		lpfc_rampup_queue_depth(vport, queue_depth);
2362

2363
	if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
2364 2365 2366 2367
	   ((jiffies - pnode->last_ramp_up_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
	   ((jiffies - pnode->last_q_full_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
2368 2369
	   (vport->cfg_lun_queue_depth > queue_depth)) {
		shost_for_each_device(tmp_sdev, shost) {
2370
			if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
2371
				if (tmp_sdev->id != scsi_id)
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384
					continue;
				if (tmp_sdev->ordered_tags)
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_ORDERED_TAG,
						tmp_sdev->queue_depth+1);
				else
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_SIMPLE_TAG,
						tmp_sdev->queue_depth+1);

				pnode->last_ramp_up_time = jiffies;
			}
		}
2385 2386
		lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode,
			0xFFFFFFFF,
2387
			queue_depth , queue_depth + 1);
2388 2389 2390 2391 2392 2393
	}

	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
2394 2395
	if (result == SAM_STAT_TASK_SET_FULL && pnode &&
	    NLP_CHK_NODE_ACT(pnode)) {
2396 2397
		pnode->last_q_full_time = jiffies;

2398 2399
		shost_for_each_device(tmp_sdev, shost) {
			if (tmp_sdev->id != scsi_id)
2400 2401 2402 2403 2404
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
					tmp_sdev->queue_depth - 1);
		}
		/*
J
James Smart 已提交
2405
		 * The queue depth cannot be lowered any more.
2406 2407 2408 2409 2410
		 * Modify the returned error code to store
		 * the final depth value set by
		 * scsi_track_queue_full.
		 */
		if (depth == -1)
2411
			depth = shost->cmd_per_lun;
2412 2413

		if (depth) {
2414 2415 2416
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
					 "0711 detected queue full - lun queue "
					 "depth adjusted to %d.\n", depth);
2417 2418 2419
			lpfc_send_sdev_queuedepth_change_event(phba, vport,
				pnode, 0xFFFFFFFF,
				depth+1, depth);
2420 2421 2422
		}
	}

2423 2424 2425 2426
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
2427
	spin_lock_irqsave(shost->host_lock, flags);
2428
	lpfc_cmd->pCmd = NULL;
2429 2430
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
2431
	spin_unlock_irqrestore(shost->host_lock, flags);
2432

2433
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2434 2435
}

2436
/**
2437
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453
 * @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]);
	}
}

2454
/**
2455
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2456 2457 2458 2459 2460
 * @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
2461
 * to transfer for device with SLI3 interface spec.
2462
 **/
已提交
2463
static void
2464
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
2465
		    struct lpfc_nodelist *pnode)
已提交
2466
{
J
James Smart 已提交
2467
	struct lpfc_hba *phba = vport->phba;
已提交
2468 2469 2470 2471 2472
	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;
2473
	char tag[2];
已提交
2474

2475 2476 2477
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
2478
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2479 2480
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
2481

2482 2483
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
2484 2485 2486

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

2487 2488
	if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
		switch (tag[0]) {
已提交
2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507
		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.
	 */
2508
	if (scsi_sg_count(scsi_cmnd)) {
已提交
2509 2510
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2511 2512 2513 2514 2515
			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
2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530
			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++;
	}
2531 2532
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2533
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2534 2535 2536 2537 2538 2539 2540
	/*
	 * 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;
2541 2542
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
2543 2544 2545 2546 2547

	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
2548
	piocbq->vport = vport;
已提交
2549 2550
}

2551
/**
2552
 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2553 2554 2555 2556 2557
 * @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.
 *
2558 2559
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
2560 2561 2562 2563 2564
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
2565
static int
2566
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
2567
			     struct lpfc_scsi_buf *lpfc_cmd,
2568
			     unsigned int lun,
已提交
2569 2570 2571 2572 2573
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
2574
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
2575 2576
	struct lpfc_nodelist *ndlp = rdata->pnode;

2577 2578
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
2579 2580 2581
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
2582 2583
	piocbq->vport = vport;

已提交
2584 2585 2586
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
2587 2588 2589
	/* 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
2590
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2591 2592
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2593
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607
	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;
2608
	} else
已提交
2609
		piocb->ulpTimeout = lpfc_cmd->timeout;
2610

2611 2612
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2613

2614
	return 1;
2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629
}

/**
 * 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)
{

2630 2631 2632 2633
	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;

2634 2635 2636 2637 2638 2639
	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;
2640 2641 2642 2643 2644
	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;
2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656
	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;
}

2657
/**
2658
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2659 2660 2661 2662 2663 2664 2665
 * @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.
 **/
2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677
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;
}

2678
/**
2679
 * lpfc_scsi_tgt_reset - Target reset handler
2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure
 * @vport: The virtual port for which this call is being executed.
 * @tgt_id: Target ID.
 * @lun: Lun number.
 * @rdata: Pointer to lpfc_rport_data.
 *
 * This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID.
 *
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
 **/
已提交
2692
static int
J
James Smart 已提交
2693
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
2694 2695
		    unsigned  tgt_id, unsigned int lun,
		    struct lpfc_rport_data *rdata)
已提交
2696
{
J
James Smart 已提交
2697
	struct lpfc_hba   *phba = vport->phba;
已提交
2698
	struct lpfc_iocbq *iocbq;
2699
	struct lpfc_iocbq *iocbqrsp;
已提交
2700
	int ret;
2701
	int status;
已提交
2702

2703
	if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
J
James Smart 已提交
2704 2705
		return FAILED;

2706
	lpfc_cmd->rdata = rdata;
2707
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
2708
					   FCP_TARGET_RESET);
2709
	if (!status)
已提交
2710 2711 2712
		return FAILED;

	iocbq = &lpfc_cmd->cur_iocbq;
2713 2714
	iocbqrsp = lpfc_sli_get_iocbq(phba);

已提交
2715 2716 2717
	if (!iocbqrsp)
		return FAILED;

2718
	/* Issue Target Reset to TGT <num> */
2719 2720 2721
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			 "0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
			 tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
2722 2723
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
2724 2725
	if (status != IOCB_SUCCESS) {
		if (status == IOCB_TIMEDOUT) {
2726
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
2727 2728 2729
			ret = TIMEOUT_ERROR;
		} else
			ret = FAILED;
已提交
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
	} else {
		ret = SUCCESS;
		lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
		lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
		if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
			(lpfc_cmd->result & IOERR_DRVR_MASK))
				lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
	}

2740
	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
2741 2742 2743
	return ret;
}

2744
/**
2745
 * lpfc_info - Info entry point of scsi_host_template data structure
2746 2747 2748 2749 2750 2751 2752
 * @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
2753 2754 2755
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
2756 2757
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781
	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;
}

2782
/**
2783
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2784 2785 2786 2787 2788
 * @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.
 **/
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798
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);
}

2799
/**
2800
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2801 2802 2803 2804
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
2805 2806 2807 2808 2809
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

2810
/**
2811
 * lpfc_poll_timeout - Restart polling timer
2812 2813 2814 2815 2816 2817
 * @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.
 **/

2818 2819
void lpfc_poll_timeout(unsigned long ptr)
{
J
James Smart 已提交
2820
	struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2821 2822 2823 2824 2825 2826 2827 2828

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring (phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

2829
/**
2830
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841
 * @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
2842 2843 2844
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
J
James Smart 已提交
2845 2846 2847
	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
2848 2849
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *ndlp = rdata->pnode;
2850
	struct lpfc_scsi_buf *lpfc_cmd;
2851 2852
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
2853

2854 2855 2856
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
2857 2858 2859
		goto out_fail_command;
	}

2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870
	if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
		scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {

		printk(KERN_ERR "BLKGRD ERROR: rcvd protected cmd:%02x op:%02x "
				"str=%s without registering for BlockGuard - "
				"Rejecting command\n",
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
2871
	/*
2872 2873
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
2874
	 */
2875 2876 2877 2878
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
		cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
		goto out_fail_command;
	}
2879 2880
	if (vport->cfg_max_scsicmpl_time &&
		(atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth))
2881
		goto out_host_busy;
2882

2883
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
2884
	if (lpfc_cmd == NULL) {
2885
		lpfc_rampdown_queue_depth(phba);
2886

2887 2888 2889
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
		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;
2900
	lpfc_cmd->start_time = jiffies;
已提交
2901 2902 2903
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
	cmnd->scsi_done = done;

2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
				"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)]);
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
				"9034 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,
					"9035 BLKGRD: READ @ sector %llu, "
2920 2921 2922
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
					blk_rq_sectors(cmnd->request));
2923 2924 2925
		else if (cmnd->cmnd[0] == WRITE_10)
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9036 BLKGRD: WRITE @ sector %llu, "
2926
					"count %u cmd=%p\n",
2927
					(unsigned long long)scsi_get_lba(cmnd),
2928
					blk_rq_sectors(cmnd->request),
2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947
					cmnd);

		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
				"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, "
2948
					 "count %u\n",
2949
					 (unsigned long long)scsi_get_lba(cmnd),
2950
					 blk_rq_sectors(cmnd->request));
2951 2952 2953
		else if (cmnd->cmnd[0] == WRITE_10)
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					 "9041 dbg: WRITE @ sector %llu, "
2954
					 "count %u cmd=%p\n",
2955
					 (unsigned long long)scsi_get_lba(cmnd),
2956
					 blk_rq_sectors(cmnd->request), cmnd);
2957 2958 2959 2960 2961 2962
		else
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					 "9042 dbg: parser not implemented\n");
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
2963 2964 2965
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
2966
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
2967

2968
	atomic_inc(&ndlp->cmd_pending);
2969
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
2970
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
2971 2972
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
已提交
2973
		goto out_host_busy_free_buf;
2974
	}
2975 2976 2977 2978 2979 2980
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
2981 2982 2983
	return 0;

 out_host_busy_free_buf:
2984
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2985
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2986 2987 2988 2989 2990 2991 2992 2993
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

2994
/**
2995
 * lpfc_block_error_handler - Routine to block error  handler
2996 2997 2998 2999
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 *  This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD.
 **/
3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014
static void
lpfc_block_error_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));

	spin_lock_irq(shost->host_lock);
	while (rport->port_state == FC_PORTSTATE_BLOCKED) {
		spin_unlock_irq(shost->host_lock);
		msleep(1000);
		spin_lock_irq(shost->host_lock);
	}
	spin_unlock_irq(shost->host_lock);
	return;
}
3015

3016
/**
3017
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3018 3019 3020 3021 3022 3023 3024 3025
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
3026
static int
3027
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
3028
{
J
James Smart 已提交
3029 3030 3031
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3032 3033
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
3034 3035
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
3036
	int ret = SUCCESS;
3037
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
3038

3039
	lpfc_block_error_handler(cmnd);
3040 3041
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	BUG_ON(!lpfc_cmd);
已提交
3042

3043 3044 3045 3046 3047 3048 3049 3050 3051 3052
	/*
	 * 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
3053

3054
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
3055

3056 3057 3058
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
3059 3060 3061 3062
		goto out;
	}

	/*
3063 3064 3065
	 * 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
3066 3067
	 */

3068 3069 3070 3071
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
3072 3073 3074 3075
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
3076

3077 3078
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
J
James Smart 已提交
3079
	if (lpfc_is_link_up(phba))
3080 3081 3082
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
3083

3084
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
3085
	abtsiocb->vport = vport;
3086 3087
	if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
	    IOCB_ERROR) {
3088 3089 3090 3091
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
3092

3093 3094 3095
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
		lpfc_sli_poll_fcp_ring (phba);

3096
	lpfc_cmd->waitq = &waitq;
3097
	/* Wait for abort to complete */
3098 3099 3100
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
			   (2*vport->cfg_devloss_tmo*HZ));
3101

3102 3103 3104
	spin_lock_irq(shost->host_lock);
	lpfc_cmd->waitq = NULL;
	spin_unlock_irq(shost->host_lock);
已提交
3105

3106 3107
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
3108 3109 3110 3111 3112 3113
		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
3114 3115 3116
	}

 out:
3117 3118 3119 3120
	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);
3121
	return ret;
3122 3123
}

3124
/**
3125
 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
3126 3127 3128 3129 3130 3131 3132
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a device reset by sending a TARGET_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
3133
 *  0x2002 - Success
3134
 **/
已提交
3135
static int
3136
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
已提交
3137
{
J
James Smart 已提交
3138 3139 3140
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3141 3142
	struct lpfc_scsi_buf *lpfc_cmd;
	struct lpfc_iocbq *iocbq, *iocbqrsp;
已提交
3143 3144
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
3145 3146 3147 3148
	unsigned long later;
	int ret = SUCCESS;
	int status;
	int cnt;
3149
	struct lpfc_scsi_event_header scsi_event;
已提交
3150

3151
	lpfc_block_error_handler(cmnd);
已提交
3152 3153
	/*
	 * If target is not in a MAPPED state, delay the reset until
3154
	 * target is rediscovered or devloss timeout expires.
已提交
3155
	 */
3156 3157
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies)) {
3158
		if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3159
			return FAILED;
J
James Smart 已提交
3160
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
已提交
3161
			break;
3162 3163 3164 3165 3166 3167
		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
		rdata = cmnd->device->hostdata;
		if (!rdata)
			break;
		pnode = rdata->pnode;
	}
3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178

	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,
3179
		LPFC_NL_VENDOR_ID);
3180

3181 3182 3183 3184 3185 3186
	if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0721 LUN Reset rport "
				 "failure: msec x%x rdata x%p\n",
				 jiffies_to_msecs(jiffies - later), rdata);
		return FAILED;
已提交
3187
	}
J
James Smart 已提交
3188
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
3189
	if (lpfc_cmd == NULL)
3190
		return FAILED;
已提交
3191
	lpfc_cmd->timeout = 60;
3192
	lpfc_cmd->rdata = rdata;
已提交
3193

3194 3195 3196 3197 3198 3199 3200
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
					      cmnd->device->lun,
					      FCP_TARGET_RESET);
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
3201 3202 3203
	iocbq = &lpfc_cmd->cur_iocbq;

	/* get a buffer for this IOCB command response */
3204
	iocbqrsp = lpfc_sli_get_iocbq(phba);
3205 3206 3207 3208
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
3209 3210 3211 3212
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			 "0703 Issue target reset to TGT %d LUN %d "
			 "rpi x%x nlp_flag x%x\n", cmnd->device->id,
			 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
3213
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3214 3215
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
	if (status == IOCB_TIMEDOUT) {
3216
		iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228
		ret = TIMEOUT_ERROR;
	} else {
		if (status != IOCB_SUCCESS)
			ret = FAILED;
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	}
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0713 SCSI layer issued device reset (%d, %d) "
			 "return x%x status x%x result x%x\n",
			 cmnd->device->id, cmnd->device->lun, ret,
			 iocbqrsp->iocb.ulpStatus,
			 iocbqrsp->iocb.un.ulpWord[4]);
3229
	lpfc_sli_release_iocbq(phba, iocbqrsp);
3230
	cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
3231
				LPFC_CTX_TGT);
3232
	if (cnt)
3233
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3234
				    cmnd->device->id, cmnd->device->lun,
3235 3236 3237 3238
				    LPFC_CTX_TGT);
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3239
		cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
3240
					cmnd->device->lun, LPFC_CTX_TGT);
已提交
3241 3242
	}
	if (cnt) {
3243 3244 3245
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0719 device reset I/O flush failure: "
				 "cnt x%x\n", cnt);
3246
		ret = FAILED;
已提交
3247 3248 3249 3250
	}
	return ret;
}

3251
/**
3252
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3253 3254 3255 3256 3257 3258 3259 3260
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does target reset to all target on @cmnd->device->host.
 *
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success
 **/
3261
static int
3262
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
3263
{
J
James Smart 已提交
3264 3265 3266
	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
3267 3268
	struct lpfc_nodelist *ndlp = NULL;
	int match;
3269
	int ret = SUCCESS, status = SUCCESS, i;
3270
	int cnt;
3271
	struct lpfc_scsi_buf * lpfc_cmd;
3272
	unsigned long later;
3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284
	struct lpfc_scsi_event_header scsi_event;

	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));

	fc_host_post_vendor_event(shost,
		fc_get_event_number(),
		sizeof(scsi_event),
		(char *)&scsi_event,
3285
		LPFC_NL_VENDOR_ID);
已提交
3286

3287
	lpfc_block_error_handler(cmnd);
已提交
3288 3289 3290 3291 3292
	/*
	 * 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.
	 */
3293
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
3294
		/* Search for mapped node by target ID */
已提交
3295
		match = 0;
J
James Smart 已提交
3296 3297
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3298 3299
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
3300
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3301
			    ndlp->nlp_sid == i &&
3302
			    ndlp->rport) {
已提交
3303 3304 3305 3306
				match = 1;
				break;
			}
		}
J
James Smart 已提交
3307
		spin_unlock_irq(shost->host_lock);
已提交
3308 3309
		if (!match)
			continue;
3310 3311 3312 3313 3314 3315 3316 3317 3318 3319
		lpfc_cmd = lpfc_get_scsi_buf(phba);
		if (lpfc_cmd) {
			lpfc_cmd->timeout = 60;
			status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
						     cmnd->device->lun,
						     ndlp->rport->dd_data);
			if (status != TIMEOUT_ERROR)
				lpfc_release_scsi_buf(phba, lpfc_cmd);
		}
		if (!lpfc_cmd || status != SUCCESS) {
3320 3321 3322
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
3323
			ret = FAILED;
已提交
3324 3325
		}
	}
3326 3327 3328 3329 3330
	/*
	 * All outstanding txcmplq I/Os should have been aborted by
	 * the targets.  Unfortunately, some targets do not abide by
	 * this forcing the driver to double check.
	 */
3331
	cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
3332
	if (cnt)
3333 3334
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
				    0, 0, LPFC_CTX_HOST);
3335 3336 3337
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3338
		cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
已提交
3339 3340
	}
	if (cnt) {
3341 3342 3343
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0715 Bus Reset I/O flush failure: "
				 "cnt x%x left x%x\n", cnt, i);
3344
		ret = FAILED;
3345
	}
3346 3347
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
3348 3349 3350
	return ret;
}

3351
/**
3352
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363
 * @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
3364 3365 3366
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
3367 3368
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3369
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3370
	uint32_t total = 0;
已提交
3371
	uint32_t num_to_alloc = 0;
3372
	int num_allocated = 0;
已提交
3373

3374
	if (!rport || fc_remote_port_chkready(rport))
已提交
3375 3376
		return -ENXIO;

3377
	sdev->hostdata = rport->dd_data;
已提交
3378 3379 3380 3381

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
3382 3383 3384
	 * 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
3385 3386
	 */
	total = phba->total_scsi_bufs;
3387
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
3388 3389 3390

	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3391 3392 3393
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
3394
		return 0;
3395 3396 3397
	/* 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 ) {
3398 3399 3400 3401 3402 3403
		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
3404 3405
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
3406 3407 3408 3409 3410 3411 3412
	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
3413 3414 3415 3416
	}
	return 0;
}

3417
/**
3418
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3419 3420 3421 3422 3423 3424 3425 3426 3427 3428
 * @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
3429 3430 3431
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
3432 3433 3434
	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
3435 3436

	if (sdev->tagged_supported)
3437
		scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3438
	else
3439
		scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3440 3441 3442 3443 3444 3445 3446

	/*
	 * 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.
	 */
3447
	rport->dev_loss_tmo = vport->cfg_devloss_tmo;
已提交
3448

3449 3450 3451 3452 3453 3454
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3455 3456 3457
	return 0;
}

3458
/**
3459
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3460 3461 3462 3463
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
3464 3465 3466 3467 3468 3469 3470
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
	sdev->hostdata = NULL;
	return;
}

3471

已提交
3472 3473 3474 3475 3476 3477
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,
3478 3479
	.eh_device_reset_handler= lpfc_device_reset_handler,
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
已提交
3480 3481 3482
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
3483
	.scan_finished		= lpfc_scan_finished,
已提交
3484
	.this_id		= -1,
3485
	.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,
J
James Smart 已提交
3488
	.shost_attrs		= lpfc_hba_attrs,
3489
	.max_sectors		= 0xFFFF,
已提交
3490
};
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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,
	.eh_device_reset_handler= lpfc_device_reset_handler,
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
3505
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
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	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
};