lpfc_scsi.c 117.4 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) 2004-2011 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>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <asm/unaligned.h>
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#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

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

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int _dump_buf_done;

static char *dif_op_str[] = {
	"SCSI_PROT_NORMAL",
	"SCSI_PROT_READ_INSERT",
	"SCSI_PROT_WRITE_STRIP",
	"SCSI_PROT_READ_STRIP",
	"SCSI_PROT_WRITE_INSERT",
	"SCSI_PROT_READ_PASS",
	"SCSI_PROT_WRITE_PASS",
};
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static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
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static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
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static void
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lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
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{
	void *src, *dst;
	struct scatterlist *sgde = scsi_sglist(cmnd);

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


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

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

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

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

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

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

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

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

	if (cmd->result)
		return;

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

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

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

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

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

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

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

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

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

	fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
	spin_lock_irqsave(&phba->hbalock, flags);
	list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
	spin_unlock_irqrestore(&phba->hbalock, flags);
	lpfc_worker_wake_up(phba);

	return;
}

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

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

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

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

	phba->last_ramp_down_time = jiffies;

	spin_unlock_irqrestore(&phba->hbalock, flags);

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

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

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/**
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 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
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 * @phba: The Hba for which this call is being executed.
 *
 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 * post at most 1 event every 5 minute after last_ramp_up_time or
 * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 * to process WORKER_RAM_DOWN_EVENT event.
 *
 * This routine should be called with no lock held.
 **/
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static inline void
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lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
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			uint32_t queue_depth)
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{
	unsigned long flags;
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	struct lpfc_hba *phba = vport->phba;
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	uint32_t evt_posted;
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	atomic_inc(&phba->num_cmd_success);

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	if (vport->cfg_lun_queue_depth <= queue_depth)
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		return;
	spin_lock_irqsave(&phba->hbalock, flags);
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	if (time_before(jiffies,
			phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
	    time_before(jiffies,
			phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
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		spin_unlock_irqrestore(&phba->hbalock, flags);
		return;
	}
	phba->last_ramp_up_time = jiffies;
	spin_unlock_irqrestore(&phba->hbalock, flags);

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

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

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

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

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/**
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 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
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 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 * thread.This routine increases queue depth for all scsi device on each vport
 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 * num_cmd_success to zero.
 **/
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void
lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
{
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	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
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	struct scsi_device *sdev;
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	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
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		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
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			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
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				if (vports[i]->cfg_lun_queue_depth <=
				    sdev->queue_depth)
					continue;
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				lpfc_change_queue_depth(sdev,
							sdev->queue_depth+1,
							SCSI_QDEPTH_RAMP_UP);
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			}
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		}
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	lpfc_destroy_vport_work_array(phba, vports);
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	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

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

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

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/**
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 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
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 * @vport: The virtual port for which this call being executed.
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 * @num_to_allocate: The requested number of buffers to allocate.
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 *
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 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 * the scsi buffer contains all the necessary information needed to initiate
 * a SCSI I/O. The non-DMAable buffer region contains information to build
 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 * and the initial BPL. In addition to allocating memory, the FCP CMND and
 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
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 *
 * Return codes:
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 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
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 **/
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static int
lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
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{
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	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
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	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_bpl;
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	uint16_t iotag;
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	int bcnt;
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	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
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		/*
		 * Get memory from the pci pool to map the virt space to pci
		 * bus space for an I/O.  The DMA buffer includes space for the
		 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
		 * necessary to support the sg_tablesize.
		 */
		psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
					GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}

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

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

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

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

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

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		if ((phba->sli_rev == 3) &&
				!(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
			/* fill in immediate fcp command BDE */
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
			iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
			iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
					unsli3.fcp_ext.icd);
			iocb->un.fcpi64.bdl.addrHigh = 0;
			iocb->ulpBdeCount = 0;
			iocb->ulpLe = 0;
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			/* fill in response BDE */
581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
			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;
602
		/* Put it back into the SCSI buffer list */
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		psb->cur_iocbq.context1  = psb;
604
		lpfc_release_scsi_buf_s3(phba, psb);
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605

606
	}
已提交
607

608
	return bcnt;
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609 610
}

611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
/**
 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 * @vport: pointer to lpfc vport data structure.
 *
 * This routine is invoked by the vport cleanup for deletions and the cleanup
 * for an ndlp on removal.
 **/
void
lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
{
	struct lpfc_hba *phba = vport->phba;
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;

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

637 638 639 640 641 642 643 644 645 646 647 648 649
/**
 * 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);
650
	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
651 652
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;
653 654
	struct lpfc_iocbq *iocbq;
	int i;
655 656
	struct lpfc_nodelist *ndlp;
	int rrq_empty = 0;
657
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
658

659 660
	spin_lock_irqsave(&phba->hbalock, iflag);
	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
661 662 663 664
	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);
665
			psb->exch_busy = 0;
666
			psb->status = IOSTAT_SUCCESS;
667 668
			spin_unlock(
				&phba->sli4_hba.abts_scsi_buf_list_lock);
669 670 671 672 673
			if (psb->rdata && psb->rdata->pnode)
				ndlp = psb->rdata->pnode;
			else
				ndlp = NULL;

674
			rrq_empty = list_empty(&phba->active_rrq_list);
675
			spin_unlock_irqrestore(&phba->hbalock, iflag);
676 677
			if (ndlp)
				lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1);
678
			lpfc_release_scsi_buf_s4(phba, psb);
679 680
			if (rrq_empty)
				lpfc_worker_wake_up(phba);
681 682 683
			return;
		}
	}
684 685 686 687 688 689 690 691 692 693 694 695
	spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
	for (i = 1; i <= phba->sli.last_iotag; i++) {
		iocbq = phba->sli.iocbq_lookup[i];

		if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
			(iocbq->iocb_flag & LPFC_IO_LIBDFC))
			continue;
		if (iocbq->sli4_xritag != xri)
			continue;
		psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
		psb->exch_busy = 0;
		spin_unlock_irqrestore(&phba->hbalock, iflag);
696 697
		if (pring->txq_cnt)
			lpfc_worker_wake_up(phba);
698 699 700 701
		return;

	}
	spin_unlock_irqrestore(&phba->hbalock, iflag);
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745
}

/**
 * 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 */
746 747 748 749 750 751 752 753
		if (!phba->sli4_hba.extents_in_use)
			status = lpfc_sli4_post_scsi_sgl_block(phba,
							&sblist,
							bcnt);
		else
			status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
							&sblist,
							bcnt);
754 755 756 757 758 759 760
		/* 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 */
761
				psb->exch_busy = 1;
762
				rc++;
763 764
			} else {
				psb->exch_busy = 0;
765
				psb->status = IOSTAT_SUCCESS;
766
			}
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
			/* 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;
797
	uint16_t iotag, last_xritag = NO_XRI, lxri = 0;
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
	int status = 0, index;
	int bcnt;
	int non_sequential_xri = 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) {
827 828
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
				psb->data, psb->dma_handle);
829 830 831 832
			kfree(psb);
			break;
		}

833 834
		lxri = lpfc_sli4_next_xritag(phba);
		if (lxri == NO_XRI) {
835 836 837 838 839
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}
840 841
		psb->cur_iocbq.sli4_lxritag = lxri;
		psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
		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));
873
		sgl->word2 = le32_to_cpu(sgl->word2);
874 875
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
876
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
877 878 879 880 881
		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));
882
		sgl->word2 = le32_to_cpu(sgl->word2);
883 884
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
885
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903

		/*
		 * 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;
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James Smart 已提交
904
		psb->cur_iocbq.context1  = psb;
905 906 907 908 909 910 911 912 913 914 915 916
		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 */
917 918 919
				psb->exch_busy = 1;
			} else {
				psb->exch_busy = 0;
920
				psb->status = IOSTAT_SUCCESS;
921
			}
922 923 924 925 926 927
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
			break;
		}
	}
	if (bcnt) {
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942
		if (!phba->sli4_hba.extents_in_use)
			status = lpfc_sli4_post_scsi_sgl_block(phba,
								&sblist,
								bcnt);
		else
			status = lpfc_sli4_post_scsi_sgl_blk_ext(phba,
								&sblist,
								bcnt);

		if (status) {
			lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
					"3021 SCSI SGL post error %d\n",
					status);
			bcnt = 0;
		}
943 944 945 946 947 948
		/* 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 */
949 950 951
				psb->exch_busy = 1;
			} else {
				psb->exch_busy = 0;
952
				psb->status = IOSTAT_SUCCESS;
953
			}
954 955 956 957 958
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
		}
	}

959
	return bcnt + non_sequential_xri;
960 961
}

962
/**
963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980
 * 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);
}

/**
981
 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
982
 * @phba: The HBA for which this call is being executed.
983 984 985 986 987 988 989 990
 *
 * 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
 **/
991
static struct lpfc_scsi_buf*
992
lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
已提交
993
{
994 995
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
996
	unsigned long iflag = 0;
997

998
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
999
	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
1000 1001 1002
	if (lpfc_cmd) {
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
1003
		lpfc_cmd->prot_seg_cnt = 0;
1004
	}
1005
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
1006 1007
	return  lpfc_cmd;
}
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
/**
 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 * @phba: The HBA for which this call is being executed.
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
1022
	struct lpfc_scsi_buf *lpfc_cmd ;
1023 1024 1025 1026
	unsigned long iflag = 0;
	int found = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1027 1028
	list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,
							list) {
1029
		if (lpfc_test_rrq_active(phba, ndlp,
1030 1031 1032
					 lpfc_cmd->cur_iocbq.sli4_xritag))
			continue;
		list_del(&lpfc_cmd->list);
1033 1034 1035 1036
		found = 1;
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
		lpfc_cmd->prot_seg_cnt = 0;
1037
		break;
1038
	}
1039 1040 1041 1042 1043 1044
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock,
						 iflag);
	if (!found)
		return NULL;
	else
		return  lpfc_cmd;
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
}
/**
 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 * @phba: The HBA for which this call is being executed.
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
	return  phba->lpfc_get_scsi_buf(phba, ndlp);
}
已提交
1062

1063
/**
1064
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1065 1066 1067 1068 1069 1070
 * @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.
 **/
1071
static void
1072
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1073
{
1074
	unsigned long iflag = 0;
已提交
1075

1076
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
1077
	psb->pCmd = NULL;
已提交
1078
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
1079
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
已提交
1080 1081
}

1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
/**
 * 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;

1097
	if (psb->exch_busy) {
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
		spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
		psb->pCmd = NULL;
		list_add_tail(&psb->list,
			&phba->sli4_hba.lpfc_abts_scsi_buf_list);
		spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
	} else {

		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);
	}
}

1114
/**
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
 * 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
1131 1132 1133 1134
 * @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
1135 1136 1137
 * 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.
1138 1139 1140 1141 1142
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
1143
static int
1144
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1145 1146 1147 1148 1149
{
	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;
1150
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
已提交
1151
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1152
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1153
	dma_addr_t physaddr;
1154
	uint32_t num_bde = 0;
1155
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1156 1157 1158 1159 1160 1161 1162 1163

	/*
	 * 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;
1164
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1165 1166 1167 1168 1169 1170 1171
		/*
		 * 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.
		 */

1172 1173 1174 1175 1176
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1177
		lpfc_cmd->seg_cnt = nseg;
已提交
1178
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1179 1180
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1181
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1182
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1183
			       lpfc_cmd->seg_cnt);
1184
			scsi_dma_unmap(scsi_cmnd);
已提交
1185 1186 1187 1188 1189 1190 1191 1192
			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.
1193 1194 1195
		 * 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
1196
		 */
1197
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1198
			physaddr = sg_dma_address(sgel);
1199
			if (phba->sli_rev == 3 &&
1200
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1201
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217
			    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
1218
		}
1219
	}
已提交
1220 1221 1222

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1223 1224 1225
	 * 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
1226
	 */
1227
	if (phba->sli_rev == 3 &&
1228 1229
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
		if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
			/*
			 * The extended IOCB format can only fit 3 BDE or a BPL.
			 * This I/O has more than 3 BDE so the 1st data bde will
			 * be a BPL that is filled in here.
			 */
			physaddr = lpfc_cmd->dma_handle;
			data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
			data_bde->tus.f.bdeSize = (num_bde *
						   sizeof(struct ulp_bde64));
			physaddr += (sizeof(struct fcp_cmnd) +
				     sizeof(struct fcp_rsp) +
				     (2 * sizeof(struct ulp_bde64)));
			data_bde->addrHigh = putPaddrHigh(physaddr);
			data_bde->addrLow = putPaddrLow(physaddr);
L
Lucas De Marchi 已提交
1245
			/* ebde count includes the response bde and data bpl */
1246 1247
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
L
Lucas De Marchi 已提交
1248
			/* ebde count includes the response bde and data bdes */
1249 1250 1251 1252 1253
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
1254
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1255
	}
1256
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1257 1258 1259 1260 1261

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1262
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1263 1264 1265 1266
	return 0;
}

/*
1267 1268 1269 1270 1271 1272 1273
 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
 * @sc: The SCSI command to examine
 * @txopt: (out) BlockGuard operation for transmitted data
 * @rxopt: (out) BlockGuard operation for received data
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
1274 1275
 */
static int
1276 1277
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1278 1279
{
	uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1280
	uint8_t ret = 0;
1281 1282 1283 1284 1285

	if (guard_type == SHOST_DIX_GUARD_IP) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1286 1287
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1288 1289 1290 1291
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1292 1293
			*txop = BG_OP_IN_NODIF_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1294 1295
			break;

1296 1297
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1298 1299
			*txop = BG_OP_IN_CSUM_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1300 1301 1302 1303
			break;

		case SCSI_PROT_NORMAL:
		default:
1304
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1305 1306
				"9063 BLKGRD: Bad op/guard:%d/IP combination\n",
					scsi_get_prot_op(sc));
1307
			ret = 1;
1308 1309 1310
			break;

		}
J
James Smart 已提交
1311
	} else {
1312 1313 1314
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1315 1316
			*txop = BG_OP_IN_NODIF_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1317 1318 1319 1320
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1321 1322
			*txop = BG_OP_IN_CRC_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1323 1324 1325 1326
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
J
James Smart 已提交
1327 1328 1329 1330
			*txop = BG_OP_IN_CRC_OUT_NODIF;
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
			break;

1331 1332
		case SCSI_PROT_NORMAL:
		default:
1333
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1334 1335
				"9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
					scsi_get_prot_op(sc));
1336
			ret = 1;
1337 1338 1339 1340
			break;
		}
	}

1341
	return ret;
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
}

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;
}

/*
 * 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:
 *                                +-------------------------+
1367 1368 1369
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386
 *                                +-------------------------+
 *                                |         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 */
1387 1388
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1389
	dma_addr_t physaddr;
1390
	int i = 0, num_bde = 0, status;
1391 1392
	int datadir = sc->sc_data_direction;
	uint32_t reftag;
J
James Smart 已提交
1393
	unsigned blksize;
1394
	uint8_t txop, rxop;
1395

1396 1397
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1398 1399
		goto out;

1400
	/* extract some info from the scsi command for pde*/
1401
	blksize = lpfc_cmd_blksize(sc);
J
James Smart 已提交
1402
	reftag = scsi_get_lba(sc) & 0xffffffff;
1403

1404 1405 1406 1407 1408
	/* setup PDE5 with what we have */
	pde5 = (struct lpfc_pde5 *) bpl;
	memset(pde5, 0, sizeof(struct lpfc_pde5));
	bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);

1409
	/* Endianness conversion if necessary for PDE5 */
1410
	pde5->word0 = cpu_to_le32(pde5->word0);
J
James Smart 已提交
1411
	pde5->reftag = cpu_to_le32(reftag);
1412

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
	/* advance bpl and increment bde count */
	num_bde++;
	bpl++;
	pde6 = (struct lpfc_pde6 *) bpl;

	/* setup PDE6 with the rest of the info */
	memset(pde6, 0, sizeof(struct lpfc_pde6));
	bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
	bf_set(pde6_optx, pde6, txop);
	bf_set(pde6_oprx, pde6, rxop);
	if (datadir == DMA_FROM_DEVICE) {
		bf_set(pde6_ce, pde6, 1);
		bf_set(pde6_re, pde6, 1);
	}
	bf_set(pde6_ai, pde6, 1);
J
James Smart 已提交
1428 1429
	bf_set(pde6_ae, pde6, 0);
	bf_set(pde6_apptagval, pde6, 0);
1430

1431
	/* Endianness conversion if necessary for PDE6 */
1432 1433 1434 1435
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

1436
	/* advance bpl and increment bde count */
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
	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:
 *                                    +-------------------------+
1471
 *   start of first prot group  -->   |          PDE_5          |
1472
 *                                    +-------------------------+
1473 1474 1475
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
1476 1477 1478 1479 1480
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
1481
 *   start of new  prot group  -->    |          PDE_5          |
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * @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 */
1500 1501
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1502
	struct lpfc_pde7 *pde7 = NULL;
1503 1504
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
1505 1506
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1507 1508
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
1509
	int status;
1510 1511 1512 1513
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
	uint32_t reftag;
1514
	uint8_t txop, rxop;
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526
	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;
	}

1527 1528
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1529 1530
		goto out;

1531
	/* extract some info from the scsi command */
1532
	blksize = lpfc_cmd_blksize(sc);
J
James Smart 已提交
1533
	reftag = scsi_get_lba(sc) & 0xffffffff;
1534 1535 1536

	split_offset = 0;
	do {
1537 1538 1539 1540
		/* setup PDE5 with what we have */
		pde5 = (struct lpfc_pde5 *) bpl;
		memset(pde5, 0, sizeof(struct lpfc_pde5));
		bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
1541

1542
		/* Endianness conversion if necessary for PDE5 */
1543
		pde5->word0 = cpu_to_le32(pde5->word0);
J
James Smart 已提交
1544
		pde5->reftag = cpu_to_le32(reftag);
1545

1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558
		/* advance bpl and increment bde count */
		num_bde++;
		bpl++;
		pde6 = (struct lpfc_pde6 *) bpl;

		/* setup PDE6 with the rest of the info */
		memset(pde6, 0, sizeof(struct lpfc_pde6));
		bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
		bf_set(pde6_optx, pde6, txop);
		bf_set(pde6_oprx, pde6, rxop);
		bf_set(pde6_ce, pde6, 1);
		bf_set(pde6_re, pde6, 1);
		bf_set(pde6_ai, pde6, 1);
J
James Smart 已提交
1559 1560
		bf_set(pde6_ae, pde6, 0);
		bf_set(pde6_apptagval, pde6, 0);
1561

1562
		/* Endianness conversion if necessary for PDE6 */
1563 1564 1565 1566
		pde6->word0 = cpu_to_le32(pde6->word0);
		pde6->word1 = cpu_to_le32(pde6->word1);
		pde6->word2 = cpu_to_le32(pde6->word2);

1567
		/* advance bpl and increment bde count */
1568 1569 1570 1571
		num_bde++;
		bpl++;

		/* setup the first BDE that points to protection buffer */
1572 1573
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
1574 1575 1576 1577

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

1578 1579 1580 1581
		pde7 = (struct lpfc_pde7 *) bpl;
		memset(pde7, 0, sizeof(struct lpfc_pde7));
		bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);

J
James Smart 已提交
1582 1583
		pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
		pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
1584

1585 1586 1587
		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

1588 1589 1590 1591 1592
		/* check if this pde is crossing the 4K boundary; if so split */
		if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
			protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
J
James Smart 已提交
1593
			protgrp_bytes = protgrp_blks * blksize;
1594 1595 1596 1597
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}
1598 1599 1600 1601 1602 1603 1604 1605

		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) {
1606 1607
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9065 BLKGRD:%s Invalid data segment\n",
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
						__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);
1647

1648 1649
		}

1650 1651 1652 1653 1654 1655 1656
		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
			bpl++;
			continue;
		}

1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
		/* 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 */
1669 1670
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9054 BLKGRD: bug in %s\n", __func__);
1671 1672 1673 1674 1675 1676 1677 1678
		}

	} while (!alldone);

out:

	return num_bde;
}
1679

1680 1681 1682 1683 1684 1685 1686 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 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751
/*
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
 * Returns:
 *			      for DIF (for both read and write)
 * */
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
{
	int ret = LPFC_PG_TYPE_INVALID;
	unsigned char op = scsi_get_prot_op(sc);

	switch (op) {
	case SCSI_PROT_READ_STRIP:
	case SCSI_PROT_WRITE_INSERT:
		ret = LPFC_PG_TYPE_NO_DIF;
		break;
	case SCSI_PROT_READ_INSERT:
	case SCSI_PROT_WRITE_STRIP:
	case SCSI_PROT_READ_PASS:
	case SCSI_PROT_WRITE_PASS:
		ret = LPFC_PG_TYPE_DIF_BUF;
		break;
	default:
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9021 Unsupported protection op:%d\n", op);
		break;
	}

	return ret;
}

/*
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
 * two functions eventually, but for now, it's here
 */
static int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
		struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	uint32_t num_bde = 0;
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
	int diflen, fcpdl;
	unsigned blksize;

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

		lpfc_cmd->seg_cnt = datasegcnt;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1752 1753 1754 1755
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9067 BLKGRD: %s: Too many sg segments"
					" from dma_map_sg.  Config %d, seg_cnt"
					" %d\n",
1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
					__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);
1768
			/* we should have 2 or more entries in buffer list */
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788
			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) {
1789 1790 1791
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9068 BLKGRD: %s: Too many prot sg "
					"segments from dma_map_sg.  Config %d,"
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
						"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);
1805
			/* we should have 3 or more entries in buffer list */
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
			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
1850
	return 0;
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
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;

1882 1883
	lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
			" 0x%x lba 0x%llx blk cnt 0x%x "
1884
			"bgstat=0x%x bghm=0x%x\n",
1885
			cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1886
			blk_rq_sectors(cmd->request), bgstat, bghm);
1887 1888 1889

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
1890 1891
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
1892
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1893
		lpfc_debug_save_data(phba, cmd);
1894 1895 1896 1897

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
1898 1899 1900 1901
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
				"Saving DIF for %u blocks to debugfs\n",
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
			lpfc_debug_save_dif(phba, cmd);
1902 1903 1904 1905 1906 1907 1908 1909
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1910 1911 1912
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
			" BlockGuard profile. bgstat:0x%x\n",
			bgstat);
1913 1914 1915 1916 1917 1918
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1919 1920
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
				"Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
				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
1931
		cmd->result = DRIVER_SENSE << 24
1932 1933
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
1934 1935
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9055 BLKGRD: guard_tag error\n");
1936 1937 1938 1939 1940 1941 1942
	}

	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
1943
		cmd->result = DRIVER_SENSE << 24
1944 1945 1946
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
1947 1948
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9056 BLKGRD: ref_tag error\n");
1949 1950 1951 1952 1953 1954 1955
	}

	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
1956
		cmd->result = DRIVER_SENSE << 24
1957 1958 1959
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
1960 1961
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9061 BLKGRD: app_tag error\n");
1962 1963 1964 1965 1966
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
J
James Smart 已提交
1967 1968 1969
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
1970
		 */
J
James Smart 已提交
1971 1972 1973 1974
		cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
		cmd->sense_buffer[8] = 0;     /* Information descriptor type */
		cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
		cmd->sense_buffer[10] = 0x80; /* Validity bit */
1975
		bghm /= cmd->device->sector_size;
1976 1977 1978 1979

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

J
James Smart 已提交
1980 1981
		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
1982 1983 1984 1985 1986
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
		cmd->result = ScsiResult(DID_ERROR, 0);
1987 1988
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9057 BLKGRD: no errors reported!\n");
1989 1990 1991 1992
	}

out:
	return ret;
已提交
1993 1994
}

1995 1996 1997 1998 1999 2000 2001 2002 2003
/**
 * 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:
2004 2005
 *	1 - Error
 *	0 - Success
2006 2007 2008 2009 2010 2011 2012 2013
 **/
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;
2014
	struct sli4_sge *first_data_sgl;
2015 2016 2017 2018 2019 2020
	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;
2021
	struct ulp_bde64 *bde;
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

	/*
	 * 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;
2046
		first_data_sgl = sgl;
2047 2048
		lpfc_cmd->seg_cnt = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
2049 2050 2051 2052
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
				" %s: Too many sg segments from "
				"dma_map_sg.  Config %d, seg_cnt %d\n",
				__func__, phba->cfg_sg_seg_cnt,
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071
			       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);
			sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2072
			sgl->word2 = le32_to_cpu(sgl->word2);
2073 2074 2075 2076 2077 2078
			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);
2079
			sgl->sge_len = cpu_to_le32(dma_len);
2080 2081 2082
			dma_offset += dma_len;
			sgl++;
		}
2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093
		/* setup the performance hint (first data BDE) if enabled */
		if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
			bde = (struct ulp_bde64 *)
					&(iocb_cmd->unsli3.sli3Words[5]);
			bde->addrLow = first_data_sgl->addr_lo;
			bde->addrHigh = first_data_sgl->addr_hi;
			bde->tus.f.bdeSize =
					le32_to_cpu(first_data_sgl->sge_len);
			bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
			bde->tus.w = cpu_to_le32(bde->tus.w);
		}
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117
	} 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;
}

2118 2119 2120 2121 2122 2123 2124 2125 2126
/**
 * 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:
2127 2128
 *	1 - Error
 *	0 - Success
2129 2130 2131 2132 2133 2134 2135
 **/
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);
}

2136
/**
2137
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157
 * @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;

2158 2159 2160
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229
	/* 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;
}
2230 2231

/**
2232
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2233
 * @phba: The HBA for which this call is being executed.
2234 2235 2236
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
2237
 * field of @lpfc_cmd for device with SLI-3 interface spec.
2238
 **/
2239
static void
2240
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2241 2242 2243 2244 2245 2246 2247
{
	/*
	 * 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.
	 */
2248 2249
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
2250 2251 2252 2253
	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);
2254 2255
}

2256
/**
2257
 * lpfc_handler_fcp_err - FCP response handler
2258 2259 2260 2261 2262 2263 2264 2265
 * @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
2266
static void
J
James Smart 已提交
2267 2268
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
2269 2270 2271 2272
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2273
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
2274 2275
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
2276
	uint32_t *lp;
已提交
2277 2278
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
2279
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
2280

2281

已提交
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291
	/*
	 *  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;
	}

2292 2293
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
2294
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2295 2296 2297 2298 2299 2300 2301 2302 2303
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2719 Invalid response length: "
				 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 rsplen);
			host_status = DID_ERROR;
			goto out;
		}
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314
		if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2757 Protocol failure detected during "
				 "processing of FCP I/O op: "
				 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 fcprsp->rspInfo3);
			host_status = DID_ERROR;
			goto out;
		}
2315 2316
	}

2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330
	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;

2331
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
2332
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2333 2334 2335 2336 2337 2338 2339
			 "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
2340

2341
	scsi_set_resid(cmnd, 0);
已提交
2342
	if (resp_info & RESID_UNDER) {
2343
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
2344

2345
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2346
				 "9025 FCP Read Underrun, expected %d, "
2347 2348 2349 2350
				 "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
2351

2352 2353 2354 2355 2356 2357 2358
		/*
		 * 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 &&
2359
			(scsi_get_resid(cmnd) != fcpi_parm)) {
2360 2361
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
2362
					 "9026 FCP Read Check Error "
2363 2364 2365 2366
					 "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]);
2367
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2368 2369
			host_status = DID_ERROR;
		}
已提交
2370 2371
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
L
Lucas De Marchi 已提交
2372
		 * be transferred for this command.  Provided a sense condition
已提交
2373 2374 2375 2376 2377
		 * 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) &&
2378 2379
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
2380
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2381
					 "9027 FCP command x%x residual "
2382 2383
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
2384
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
2385
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
2386 2387 2388
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
2389
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2390
				 "9028 FCP command x%x residual overrun error. "
2391
				 "Data: x%x x%x\n", cmnd->cmnd[0],
2392
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
2393 2394 2395 2396 2397 2398
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
	 * (fcpi_parm should be zero). Apply check only to reads.
	 */
J
James Smart 已提交
2399
	} else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2400
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2401
				 "9029 FCP Read Check Error Data: "
J
James Smart 已提交
2402
				 "x%x x%x x%x x%x x%x\n",
2403 2404
				 be32_to_cpu(fcpcmd->fcpDl),
				 be32_to_cpu(fcprsp->rspResId),
J
James Smart 已提交
2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416
				 fcpi_parm, cmnd->cmnd[0], scsi_status);
		switch (scsi_status) {
		case SAM_STAT_GOOD:
		case SAM_STAT_CHECK_CONDITION:
			/* Fabric dropped a data frame. Fail any successful
			 * command in which we detected dropped frames.
			 * A status of good or some check conditions could
			 * be considered a successful command.
			 */
			host_status = DID_ERROR;
			break;
		}
2417
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
2418 2419 2420 2421
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
2422
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
2423 2424
}

2425
/**
2426
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2427 2428
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2429
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2430 2431 2432 2433 2434
 *
 * 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
2435 2436 2437 2438 2439 2440
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
2441
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
2442 2443
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
2444
	struct scsi_cmnd *cmd;
2445
	int result;
2446
	struct scsi_device *tmp_sdev;
2447
	int depth;
2448
	unsigned long flags;
2449
	struct lpfc_fast_path_event *fast_path_evt;
2450
	struct Scsi_Host *shost;
2451
	uint32_t queue_depth, scsi_id;
已提交
2452

2453 2454 2455 2456 2457 2458
	/* Sanity check on return of outstanding command */
	if (!(lpfc_cmd->pCmd))
		return;
	cmd = lpfc_cmd->pCmd;
	shost = cmd->device->host;

已提交
2459 2460
	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2461 2462 2463
	/* pick up SLI4 exhange busy status from HBA */
	lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;

2464 2465
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
2466 2467 2468 2469 2470 2471 2472 2473

	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;

2474
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2475
				 "9030 FCP cmd x%x failed <%d/%d> "
2476 2477 2478 2479 2480 2481 2482
				 "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
2483 2484 2485 2486

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
2487
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
2488 2489 2490
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
2491
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
			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
2516
			break;
2517
		case IOSTAT_LOCAL_REJECT:
2518
		case IOSTAT_REMOTE_STOP:
2519 2520 2521 2522 2523 2524 2525 2526 2527
			if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
			    lpfc_cmd->result ==
					IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
			    lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
			    lpfc_cmd->result ==
					IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
				cmd->result = ScsiResult(DID_NO_CONNECT, 0);
				break;
			}
2528
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2529
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
2530 2531
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2532
				cmd->result = ScsiResult(DID_REQUEUE, 0);
2533
				break;
2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549
			}
			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 "
2550
							"on unprotected cmd\n");
2551 2552
				}
			}
2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563
			if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
				&& (phba->sli_rev == LPFC_SLI_REV4)
				&& (pnode && NLP_CHK_NODE_ACT(pnode))) {
				/* This IO was aborted by the target, we don't
				 * know the rxid and because we did not send the
				 * ABTS we cannot generate and RRQ.
				 */
				lpfc_set_rrq_active(phba, pnode,
						lpfc_cmd->cur_iocbq.sli4_xritag,
						0, 0);
			}
2564
		/* else: fall through */
已提交
2565 2566 2567 2568 2569
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

2570
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2571
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2572 2573
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
2574
	} else
已提交
2575 2576 2577 2578 2579
		cmd->result = ScsiResult(DID_OK, 0);

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

2580 2581 2582 2583 2584 2585
		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
2586 2587
	}

2588
	lpfc_update_stats(phba, lpfc_cmd);
2589
	result = cmd->result;
2590 2591 2592
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2593
		spin_lock_irqsave(shost->host_lock, flags);
2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605
		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;
		}
2606
		spin_unlock_irqrestore(shost->host_lock, flags);
2607
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2608
		if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2609
		   time_after(jiffies, pnode->last_change_time +
2610
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2611
			spin_lock_irqsave(shost->host_lock, flags);
2612 2613 2614 2615 2616 2617
			depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
				/ 100;
			depth = depth ? depth : 1;
			pnode->cmd_qdepth += depth;
			if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
				pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2618
			pnode->last_change_time = jiffies;
2619
			spin_unlock_irqrestore(shost->host_lock, flags);
2620
		}
2621 2622
	}

2623
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2624 2625 2626 2627

	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	queue_depth = cmd->device->queue_depth;
	scsi_id = cmd->device->id;
2628 2629
	cmd->scsi_done(cmd);

2630
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2631 2632 2633 2634
		/*
		 * If there is a thread waiting for command completion
		 * wake up the thread.
		 */
2635
		spin_lock_irqsave(shost->host_lock, flags);
2636
		lpfc_cmd->pCmd = NULL;
2637 2638
		if (lpfc_cmd->waitq)
			wake_up(lpfc_cmd->waitq);
2639
		spin_unlock_irqrestore(shost->host_lock, flags);
2640 2641 2642 2643
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

2644
	if (!result)
2645
		lpfc_rampup_queue_depth(vport, queue_depth);
2646

2647 2648 2649 2650
	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
2651 2652
	if (result == SAM_STAT_TASK_SET_FULL && pnode &&
	    NLP_CHK_NODE_ACT(pnode)) {
2653 2654
		shost_for_each_device(tmp_sdev, shost) {
			if (tmp_sdev->id != scsi_id)
2655 2656
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
2657 2658 2659
						      tmp_sdev->queue_depth-1);
			if (depth <= 0)
				continue;
2660 2661 2662
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
					 "0711 detected queue full - lun queue "
					 "depth adjusted to %d.\n", depth);
2663
			lpfc_send_sdev_queuedepth_change_event(phba, vport,
2664 2665 2666
							       pnode,
							       tmp_sdev->lun,
							       depth+1, depth);
2667 2668 2669
		}
	}

2670 2671 2672 2673
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
2674
	spin_lock_irqsave(shost->host_lock, flags);
2675
	lpfc_cmd->pCmd = NULL;
2676 2677
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
2678
	spin_unlock_irqrestore(shost->host_lock, flags);
2679

2680
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2681 2682
}

2683
/**
2684
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700
 * @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]);
	}
}

2701
/**
2702
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2703 2704 2705 2706 2707
 * @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
2708
 * to transfer for device with SLI3 interface spec.
2709
 **/
已提交
2710
static void
2711
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
2712
		    struct lpfc_nodelist *pnode)
已提交
2713
{
J
James Smart 已提交
2714
	struct lpfc_hba *phba = vport->phba;
已提交
2715 2716 2717 2718 2719
	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;
2720
	char tag[2];
已提交
2721

2722 2723 2724
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
2725
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2726 2727
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
2728

2729 2730
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
2731 2732 2733

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

2734 2735
	if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
		switch (tag[0]) {
已提交
2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754
		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.
	 */
2755
	if (scsi_sg_count(scsi_cmnd)) {
已提交
2756 2757
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2758 2759 2760 2761 2762
			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
2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
			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++;
	}
2778 2779
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2780
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2781 2782 2783 2784 2785
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
2786 2787 2788
	if (phba->sli_rev == LPFC_SLI_REV4)
		piocbq->iocb.ulpContext =
		  phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
已提交
2789 2790
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
2791 2792
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
2793 2794 2795 2796 2797

	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
2798
	piocbq->vport = vport;
已提交
2799 2800
}

2801
/**
2802
 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
2803 2804 2805 2806 2807
 * @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.
 *
2808 2809
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
2810 2811 2812 2813 2814
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
2815
static int
2816
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
2817
			     struct lpfc_scsi_buf *lpfc_cmd,
2818
			     unsigned int lun,
已提交
2819 2820 2821 2822 2823
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
2824
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
2825 2826
	struct lpfc_nodelist *ndlp = rdata->pnode;

2827 2828
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
2829 2830 2831
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
2832 2833
	piocbq->vport = vport;

已提交
2834 2835 2836
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
2837 2838 2839
	/* 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
2840
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2841 2842
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2843
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2844 2845
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
2846 2847 2848 2849
	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
		piocb->ulpContext =
		  vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
	}
已提交
2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861
	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;
2862
	} else
已提交
2863
		piocb->ulpTimeout = lpfc_cmd->timeout;
2864

2865 2866
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2867

2868
	return 1;
2869 2870 2871
}

/**
L
Lucas De Marchi 已提交
2872
 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883
 * @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)
{

2884 2885 2886
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;

2887 2888 2889 2890 2891
	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;
2892
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
2893
		break;
2894 2895 2896 2897
	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;
2898
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
2899
		break;
2900 2901 2902 2903 2904 2905 2906 2907
	default:
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"1418 Invalid HBA PCI-device group: 0x%x\n",
				dev_grp);
		return -ENODEV;
		break;
	}
	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2908
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2909 2910 2911
	return 0;
}

2912
/**
2913
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2914 2915 2916 2917 2918 2919 2920
 * @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.
 **/
2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
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;
}

2933
/**
2934
 * lpfc_info - Info entry point of scsi_host_template data structure
2935 2936 2937 2938 2939 2940 2941
 * @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
2942 2943 2944
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
2945 2946
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966
	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);
		}
2967 2968 2969 2970 2971 2972 2973
		len = strlen(lpfcinfobuf);
		if (phba->sli4_hba.link_state.logical_speed) {
			snprintf(lpfcinfobuf + len,
				 384-len,
				 " Logical Link Speed: %d Mbps",
				 phba->sli4_hba.link_state.logical_speed * 10);
		}
已提交
2974 2975 2976 2977
	}
	return lpfcinfobuf;
}

2978
/**
2979
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2980 2981 2982 2983 2984
 * @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.
 **/
2985 2986 2987 2988 2989 2990 2991 2992 2993 2994
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);
}

2995
/**
2996
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2997 2998 2999 3000
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
3001 3002 3003 3004 3005
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

3006
/**
3007
 * lpfc_poll_timeout - Restart polling timer
3008 3009 3010 3011 3012 3013
 * @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.
 **/

3014 3015
void lpfc_poll_timeout(unsigned long ptr)
{
J
James Smart 已提交
3016
	struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
3017 3018

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3019 3020 3021
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

3022 3023 3024 3025 3026
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

3027
/**
3028
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039
 * @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
3040
static int
J
Jeff Garzik 已提交
3041
lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
已提交
3042
{
J
James Smart 已提交
3043 3044 3045
	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
3046
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3047
	struct lpfc_nodelist *ndlp;
3048
	struct lpfc_scsi_buf *lpfc_cmd;
3049 3050
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
3051

3052 3053 3054
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
3055 3056
		goto out_fail_command;
	}
3057
	ndlp = rdata->pnode;
已提交
3058

3059 3060 3061
	if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
		scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {

3062 3063 3064 3065
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
				" op:%02x str=%s without registering for"
				" BlockGuard - Rejecting command\n",
3066 3067 3068 3069 3070
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
3071
	/*
3072 3073
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
3074
	 */
3075
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
3076
		cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
3077 3078
		goto out_fail_command;
	}
3079
	if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
3080
		goto out_tgt_busy;
3081

3082
	lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
已提交
3083
	if (lpfc_cmd == NULL) {
3084
		lpfc_rampdown_queue_depth(phba);
3085

3086 3087 3088
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098
		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;
3099
	lpfc_cmd->start_time = jiffies;
已提交
3100 3101 3102
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
	cmnd->scsi_done = done;

3103
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
3104 3105
		if (vport->phba->cfg_enable_bg) {
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3106 3107 3108 3109
				"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)]);
3110
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3111
				"9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
3112
				"%02x %02x %02x %02x %02x\n",
3113 3114 3115 3116
				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]);
3117 3118
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3119
					"9035 BLKGRD: READ @ sector %llu, "
3120 3121 3122
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
					blk_rq_sectors(cmnd->request));
3123 3124
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3125
					"9036 BLKGRD: WRITE @ sector %llu, "
3126
					"count %u cmd=%p\n",
3127
					(unsigned long long)scsi_get_lba(cmnd),
3128
					blk_rq_sectors(cmnd->request),
3129
					cmnd);
3130
		}
3131 3132 3133

		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
3134
		if (vport->phba->cfg_enable_bg) {
3135
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152
					"9038 BLKGRD: rcvd unprotected cmd:"
					"%02x op:%02x str=%s\n",
					cmnd->cmnd[0], scsi_get_prot_op(cmnd),
					dif_op_str[scsi_get_prot_op(cmnd)]);
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9039 BLKGRD: CDB: %02x %02x %02x "
					"%02x %02x %02x %02x %02x %02x %02x\n",
					cmnd->cmnd[0], cmnd->cmnd[1],
					cmnd->cmnd[2], cmnd->cmnd[3],
					cmnd->cmnd[4], cmnd->cmnd[5],
					cmnd->cmnd[6], cmnd->cmnd[7],
					cmnd->cmnd[8], cmnd->cmnd[9]);
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9040 dbg: READ @ sector %llu, "
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
3153
					 blk_rq_sectors(cmnd->request));
3154 3155
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3156
					 "9041 dbg: WRITE @ sector %llu, "
3157
					 "count %u cmd=%p\n",
3158
					 (unsigned long long)scsi_get_lba(cmnd),
3159
					 blk_rq_sectors(cmnd->request), cmnd);
3160 3161
			else
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3162
					 "9042 dbg: parser not implemented\n");
3163
		}
3164 3165 3166
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
3167 3168 3169
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
3170
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
3171

3172
	atomic_inc(&ndlp->cmd_pending);
3173
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3174
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3175 3176
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
已提交
3177
		goto out_host_busy_free_buf;
3178
	}
3179
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3180 3181 3182 3183 3184
		spin_unlock(shost->host_lock);
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

		spin_lock(shost->host_lock);
3185 3186 3187 3188
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3189 3190 3191
	return 0;

 out_host_busy_free_buf:
3192
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3193
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
3194 3195 3196
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

3197 3198 3199
 out_tgt_busy:
	return SCSI_MLQUEUE_TARGET_BUSY;

已提交
3200 3201 3202 3203 3204
 out_fail_command:
	done(cmnd);
	return 0;
}

J
Jeff Garzik 已提交
3205 3206
static DEF_SCSI_QCMD(lpfc_queuecommand)

3207
/**
3208
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3209 3210 3211 3212 3213 3214 3215 3216
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
3217
static int
3218
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
3219
{
J
James Smart 已提交
3220 3221 3222
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3223 3224
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
3225 3226
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
3227
	int ret = SUCCESS;
3228
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
3229

3230 3231 3232
	ret = fc_block_scsi_eh(cmnd);
	if (ret)
		return ret;
3233
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
J
James Smart 已提交
3234 3235 3236
	if (!lpfc_cmd) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
3237 3238
			 "x%x ID %d LUN %d\n",
			 ret, cmnd->device->id, cmnd->device->lun);
J
James Smart 已提交
3239 3240
		return SUCCESS;
	}
已提交
3241

3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
	/*
	 * 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
3252

3253
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
3254

3255 3256 3257
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
3258 3259 3260 3261
		goto out;
	}

	/*
3262 3263 3264
	 * 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
3265 3266
	 */

3267 3268 3269 3270
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
3271 3272 3273 3274
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
3275

3276 3277
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
3278 3279 3280

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
	abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3281
	abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3282

J
James Smart 已提交
3283
	if (lpfc_is_link_up(phba))
3284 3285 3286
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
3287

3288
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
3289
	abtsiocb->vport = vport;
3290 3291
	if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
	    IOCB_ERROR) {
3292 3293 3294 3295
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
3296

3297
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3298 3299
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3300

3301
	lpfc_cmd->waitq = &waitq;
3302
	/* Wait for abort to complete */
3303 3304 3305
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
			   (2*vport->cfg_devloss_tmo*HZ));
3306

3307 3308 3309
	spin_lock_irq(shost->host_lock);
	lpfc_cmd->waitq = NULL;
	spin_unlock_irq(shost->host_lock);
已提交
3310

3311 3312
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
3313 3314 3315
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
				 "for abort to complete: ret %#x, ID %d, "
3316 3317
				 "LUN %d\n",
				 ret, cmnd->device->id, cmnd->device->lun);
已提交
3318 3319 3320
	}

 out:
3321 3322
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
3323 3324
			 "LUN %d\n", ret, cmnd->device->id,
			 cmnd->device->lun);
3325
	return ret;
3326 3327
}

3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350
static char *
lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
{
	switch (task_mgmt_cmd) {
	case FCP_ABORT_TASK_SET:
		return "ABORT_TASK_SET";
	case FCP_CLEAR_TASK_SET:
		return "FCP_CLEAR_TASK_SET";
	case FCP_BUS_RESET:
		return "FCP_BUS_RESET";
	case FCP_LUN_RESET:
		return "FCP_LUN_RESET";
	case FCP_TARGET_RESET:
		return "FCP_TARGET_RESET";
	case FCP_CLEAR_ACA:
		return "FCP_CLEAR_ACA";
	case FCP_TERMINATE_TASK:
		return "FCP_TERMINATE_TASK";
	default:
		return "unknown";
	}
}

3351
/**
3352 3353 3354 3355 3356 3357
 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
 * @vport: The virtual port for which this call is being executed.
 * @rdata: Pointer to remote port local data
 * @tgt_id: Target ID of remote device.
 * @lun_id: Lun number for the TMF
 * @task_mgmt_cmd: type of TMF to send
3358
 *
3359 3360
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
3361
 *
3362 3363 3364
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
3365
 **/
已提交
3366
static int
3367 3368 3369
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
		    unsigned  tgt_id, unsigned int lun_id,
		    uint8_t task_mgmt_cmd)
已提交
3370
{
J
James Smart 已提交
3371
	struct lpfc_hba   *phba = vport->phba;
3372
	struct lpfc_scsi_buf *lpfc_cmd;
3373 3374
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
3375
	struct lpfc_nodelist *pnode = rdata->pnode;
3376
	int ret;
3377
	int status;
已提交
3378

3379
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3380
		return FAILED;
3381

3382
	lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
已提交
3383
	if (lpfc_cmd == NULL)
3384
		return FAILED;
已提交
3385
	lpfc_cmd->timeout = 60;
3386
	lpfc_cmd->rdata = rdata;
已提交
3387

3388 3389
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
3390 3391 3392 3393
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
3394

3395
	iocbq = &lpfc_cmd->cur_iocbq;
3396
	iocbqrsp = lpfc_sli_get_iocbq(phba);
3397 3398 3399 3400
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
3401

3402
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3403
			 "0702 Issue %s to TGT %d LUN %d "
3404
			 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
3405
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3406 3407
			 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
			 iocbq->iocb_flag);
3408

3409
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3410
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
3411 3412 3413 3414 3415
	if (status != IOCB_SUCCESS) {
		if (status == IOCB_TIMEDOUT) {
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
			ret = TIMEOUT_ERROR;
		} else
3416
			ret = FAILED;
3417 3418
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3419 3420
			 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
			 "iocb_flag x%x\n",
3421 3422
			 lpfc_taskmgmt_name(task_mgmt_cmd),
			 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3423 3424
			 iocbqrsp->iocb.un.ulpWord[4],
			 iocbq->iocb_flag);
3425 3426 3427
	} else if (status == IOCB_BUSY)
		ret = FAILED;
	else
3428 3429
		ret = SUCCESS;

3430
	lpfc_sli_release_iocbq(phba, iocbqrsp);
3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453

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

	return ret;
}

/**
 * lpfc_chk_tgt_mapped -
 * @vport: The virtual port to check on
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine delays until the scsi target (aka rport) for the
 * command exists (is present and logged in) or we declare it non-existent.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
{
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3454
	struct lpfc_nodelist *pnode;
3455 3456
	unsigned long later;

3457 3458 3459 3460 3461 3462
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			"0797 Tgt Map rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509
	/*
	 * If target is not in a MAPPED state, delay until
	 * target is rediscovered or devloss timeout expires.
	 */
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies)) {
		if (!pnode || !NLP_CHK_NODE_ACT(pnode))
			return FAILED;
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
			return SUCCESS;
		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
		rdata = cmnd->device->hostdata;
		if (!rdata)
			return FAILED;
		pnode = rdata->pnode;
	}
	if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
	    (pnode->nlp_state != NLP_STE_MAPPED_NODE))
		return FAILED;
	return SUCCESS;
}

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

	cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3510
	if (cnt)
3511
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3512
				    tgt_id, lun_id, context);
3513 3514 3515
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3516
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
3517 3518
	}
	if (cnt) {
3519
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3520 3521 3522 3523 3524 3525
			"0724 I/O flush failure for context %s : cnt x%x\n",
			((context == LPFC_CTX_LUN) ? "LUN" :
			 ((context == LPFC_CTX_TGT) ? "TGT" :
			  ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
			cnt);
		return FAILED;
已提交
3526
	}
3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546
	return SUCCESS;
}

/**
 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a device reset by sending a LUN_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3547
	struct lpfc_nodelist *pnode;
3548 3549 3550 3551 3552
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3553 3554 3555 3556 3557 3558
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0798 Device Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3559 3560 3561
	status = fc_block_scsi_eh(cmnd);
	if (status)
		return status;
3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613

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

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

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

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

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0713 SCSI layer issued Device Reset (%d, %d) "
			 "return x%x\n", tgt_id, lun_id, status);

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

/**
 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a target reset by sending a TARGET_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3614
	struct lpfc_nodelist *pnode;
3615 3616 3617 3618 3619
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3620 3621 3622 3623 3624 3625
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0799 Target Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3626 3627 3628
	status = fc_block_scsi_eh(cmnd);
	if (status)
		return status;
3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0722 Target Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}

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

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

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

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0723 SCSI layer issued Target Reset (%d, %d) "
			 "return x%x\n", tgt_id, lun_id, status);

	/*
	 * We have to clean up i/o as : they may be orphaned by the TMF;
	 * or if the TMF failed, they may be in an indeterminate state.
	 * So, continue on.
	 * We will report success if all the i/o aborts successfully.
	 */
	status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					LPFC_CTX_TGT);
	return status;
已提交
3662 3663
}

3664
/**
3665
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3666 3667
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
3668 3669
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
3670
 *
3671 3672 3673
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
3674
 **/
3675
static int
3676
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
3677
{
J
James Smart 已提交
3678 3679
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
3680
	struct lpfc_nodelist *ndlp = NULL;
3681
	struct lpfc_scsi_event_header scsi_event;
3682 3683
	int match;
	int ret = SUCCESS, status, i;
3684 3685 3686 3687 3688 3689 3690

	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));

3691 3692
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
3693

3694 3695 3696
	ret = fc_block_scsi_eh(cmnd);
	if (ret)
		return ret;
3697

已提交
3698 3699 3700 3701 3702
	/*
	 * 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.
	 */
3703
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
3704
		/* Search for mapped node by target ID */
已提交
3705
		match = 0;
J
James Smart 已提交
3706 3707
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3708 3709
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
3710
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3711
			    ndlp->nlp_sid == i &&
3712
			    ndlp->rport) {
已提交
3713 3714 3715 3716
				match = 1;
				break;
			}
		}
J
James Smart 已提交
3717
		spin_unlock_irq(shost->host_lock);
已提交
3718 3719
		if (!match)
			continue;
3720 3721 3722 3723 3724

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

		if (status != SUCCESS) {
3725 3726 3727
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
3728
			ret = FAILED;
已提交
3729 3730
		}
	}
3731
	/*
3732 3733 3734 3735
	 * We have to clean up i/o as : they may be orphaned by the TMFs
	 * above; or if any of the TMFs failed, they may be in an
	 * indeterminate state.
	 * We will report success if all the i/o aborts successfully.
3736
	 */
3737 3738 3739

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
3740
		ret = FAILED;
3741

3742 3743
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
3744 3745 3746
	return ret;
}

3747
/**
3748
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759
 * @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
3760 3761 3762
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
3763 3764
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3765
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3766
	uint32_t total = 0;
已提交
3767
	uint32_t num_to_alloc = 0;
3768
	int num_allocated = 0;
3769
	uint32_t sdev_cnt;
已提交
3770

3771
	if (!rport || fc_remote_port_chkready(rport))
已提交
3772 3773
		return -ENXIO;

3774
	sdev->hostdata = rport->dd_data;
3775
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
已提交
3776 3777 3778 3779

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
3780 3781 3782
	 * 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
3783 3784
	 */
	total = phba->total_scsi_bufs;
3785
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
3786

3787 3788 3789 3790
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

3791 3792
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3793 3794 3795
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
3796
		return 0;
3797 3798 3799
	/* 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 ) {
3800 3801 3802 3803 3804 3805
		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
3806 3807
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
3808 3809 3810 3811 3812 3813 3814
	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
3815
	}
3816 3817
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
已提交
3818 3819 3820
	return 0;
}

3821
/**
3822
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3823 3824 3825 3826 3827 3828 3829 3830 3831
 * @sdev: Pointer to scsi_device.
 *
 * This routine configures following items
 *   - Tag command queuing support for @sdev if supported.
 *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
 *
 * Return codes:
 *   0 - Success
 **/
已提交
3832 3833 3834
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
3835 3836
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
3837 3838

	if (sdev->tagged_supported)
3839
		scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3840
	else
3841
		scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3842

3843
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3844 3845
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3846 3847 3848 3849
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3850 3851 3852
	return 0;
}

3853
/**
3854
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3855 3856 3857 3858
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
3859 3860 3861
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
3862 3863 3864
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	atomic_dec(&phba->sdev_cnt);
已提交
3865 3866 3867 3868
	sdev->hostdata = NULL;
	return;
}

3869

已提交
3870 3871 3872 3873 3874 3875
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,
3876 3877
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3878
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
已提交
3879 3880 3881
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
3882
	.scan_finished		= lpfc_scan_finished,
已提交
3883
	.this_id		= -1,
3884
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
3885 3886
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
J
James Smart 已提交
3887
	.shost_attrs		= lpfc_hba_attrs,
3888
	.max_sectors		= 0xFFFF,
3889
	.vendor_id		= LPFC_NL_VENDOR_ID,
3890
	.change_queue_depth	= lpfc_change_queue_depth,
已提交
3891
};
3892 3893 3894 3895 3896 3897 3898

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,
3899 3900
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3901 3902 3903 3904 3905 3906
	.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,
3907
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
3908 3909 3910 3911
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
3912
	.change_queue_depth	= lpfc_change_queue_depth,
3913
};