lpfc_scsi.c 164.1 KB
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/*******************************************************************
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 * This file is part of the Emulex Linux Device Driver for         *
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 * Fibre Channel Host Bus Adapters.                                *
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 * Copyright (C) 2004-2012 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/export.h>
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#include <linux/delay.h>
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#include <asm/unaligned.h>
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#include <linux/crc-t10dif.h>
#include <net/checksum.h>
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#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

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

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

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

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#if !defined(SCSI_PROT_GUARD_CHECK) || !defined(SCSI_PROT_REF_CHECK)
#define scsi_prot_flagged(sc, flg)	sc
#endif

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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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/**
 * lpfc_change_queue_type() - Change a device's scsi tag queuing type
 * @sdev: Pointer the scsi device whose queue depth is to change
 * @tag_type: Identifier for queue tag type
 */
static int
lpfc_change_queue_type(struct scsi_device *sdev, int tag_type)
{
	if (sdev->tagged_supported) {
		scsi_set_tag_type(sdev, tag_type);
		if (tag_type)
			scsi_activate_tcq(sdev, sdev->queue_depth);
		else
			scsi_deactivate_tcq(sdev, sdev->queue_depth);
	} else
		tag_type = 0;

	return tag_type;
}

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

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

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

	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
			 num_to_alloc, phba->cfg_sg_dma_buf_size,
			 (int)sizeof(struct fcp_cmnd),
			 (int)sizeof(struct fcp_rsp), bpl_size);
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	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
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		/*
		 * Get memory from the pci pool to map the virt space to pci
		 * bus space for an I/O.  The DMA buffer includes space for the
		 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
		 * necessary to support the sg_tablesize.
		 */
		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) +
588
			sizeof(struct fcp_rsp);
已提交
589

590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630
		/* 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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Lucas De Marchi 已提交
631
			/* fill in response BDE */
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
			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;
653
		/* Put it back into the SCSI buffer list */
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James Smart 已提交
654
		psb->cur_iocbq.context1  = psb;
655
		lpfc_release_scsi_buf_s3(phba, psb);
已提交
656

657
	}
已提交
658

659
	return bcnt;
已提交
660 661
}

662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
/**
 * 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);
}

688 689 690 691 692 693 694 695 696 697 698 699 700
/**
 * 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);
701
	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
702 703
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;
704 705
	struct lpfc_iocbq *iocbq;
	int i;
706 707
	struct lpfc_nodelist *ndlp;
	int rrq_empty = 0;
708
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
709

710 711
	spin_lock_irqsave(&phba->hbalock, iflag);
	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
712 713 714 715
	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);
716
			psb->exch_busy = 0;
717
			psb->status = IOSTAT_SUCCESS;
718 719
			spin_unlock(
				&phba->sli4_hba.abts_scsi_buf_list_lock);
720 721 722 723 724
			if (psb->rdata && psb->rdata->pnode)
				ndlp = psb->rdata->pnode;
			else
				ndlp = NULL;

725
			rrq_empty = list_empty(&phba->active_rrq_list);
726
			spin_unlock_irqrestore(&phba->hbalock, iflag);
727
			if (ndlp) {
728 729
				lpfc_set_rrq_active(phba, ndlp,
					psb->cur_iocbq.sli4_lxritag, rxid, 1);
730 731
				lpfc_sli4_abts_err_handler(phba, ndlp, axri);
			}
732
			lpfc_release_scsi_buf_s4(phba, psb);
733 734
			if (rrq_empty)
				lpfc_worker_wake_up(phba);
735 736 737
			return;
		}
	}
738 739 740 741 742 743 744 745 746 747 748 749
	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);
750
		if (!list_empty(&pring->txq))
751
			lpfc_worker_wake_up(phba);
752 753 754 755
		return;

	}
	spin_unlock_irqrestore(&phba->hbalock, iflag);
756 757 758
}

/**
759
 * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
760
 * @phba: pointer to lpfc hba data structure.
761
 * @post_sblist: pointer to the scsi buffer list.
762
 *
763 764 765 766 767 768
 * This routine walks a list of scsi buffers that was passed in. It attempts
 * to construct blocks of scsi buffer sgls which contains contiguous xris and
 * uses the non-embedded SGL block post mailbox commands to post to the port.
 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 * embedded SGL post mailbox command for posting. The @post_sblist passed in
 * must be local list, thus no lock is needed when manipulate the list.
769
 *
770
 * Returns: 0 = failure, non-zero number of successfully posted buffers.
771 772
 **/
int
773 774
lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
			     struct list_head *post_sblist, int sb_count)
775
{
776
	struct lpfc_scsi_buf *psb, *psb_next;
777
	int status, sgl_size;
778 779 780 781 782 783 784 785 786 787 788
	int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
	dma_addr_t pdma_phys_bpl1;
	int last_xritag = NO_XRI;
	LIST_HEAD(prep_sblist);
	LIST_HEAD(blck_sblist);
	LIST_HEAD(scsi_sblist);

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

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

792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
	list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
		list_del_init(&psb->list);
		block_cnt++;
		if ((last_xritag != NO_XRI) &&
		    (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
			/* a hole in xri block, form a sgl posting block */
			list_splice_init(&prep_sblist, &blck_sblist);
			post_cnt = block_cnt - 1;
			/* prepare list for next posting block */
			list_add_tail(&psb->list, &prep_sblist);
			block_cnt = 1;
		} else {
			/* prepare list for next posting block */
			list_add_tail(&psb->list, &prep_sblist);
			/* enough sgls for non-embed sgl mbox command */
			if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
				list_splice_init(&prep_sblist, &blck_sblist);
				post_cnt = block_cnt;
				block_cnt = 0;
811
			}
812 813 814
		}
		num_posting++;
		last_xritag = psb->cur_iocbq.sli4_xritag;
815

816 817 818 819 820 821 822 823
		/* end of repost sgl list condition for SCSI buffers */
		if (num_posting == sb_count) {
			if (post_cnt == 0) {
				/* last sgl posting block */
				list_splice_init(&prep_sblist, &blck_sblist);
				post_cnt = block_cnt;
			} else if (block_cnt == 1) {
				/* last single sgl with non-contiguous xri */
824
				if (sgl_size > SGL_PAGE_SIZE)
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845
					pdma_phys_bpl1 = psb->dma_phys_bpl +
								SGL_PAGE_SIZE;
				else
					pdma_phys_bpl1 = 0;
				status = lpfc_sli4_post_sgl(phba,
						psb->dma_phys_bpl,
						pdma_phys_bpl1,
						psb->cur_iocbq.sli4_xritag);
				if (status) {
					/* failure, put on abort scsi list */
					psb->exch_busy = 1;
				} else {
					/* success, put on SCSI buffer list */
					psb->exch_busy = 0;
					psb->status = IOSTAT_SUCCESS;
					num_posted++;
				}
				/* success, put on SCSI buffer sgl list */
				list_add_tail(&psb->list, &scsi_sblist);
			}
		}
846

847 848
		/* continue until a nembed page worth of sgls */
		if (post_cnt == 0)
849
			continue;
850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865

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

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

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

		/* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
		while (!list_empty(&blck_sblist)) {
			list_remove_head(&blck_sblist, psb,
					 struct lpfc_scsi_buf, list);
866
			if (status) {
867
				/* failure, put on abort scsi list */
868 869
				psb->exch_busy = 1;
			} else {
870
				/* success, put on SCSI buffer list */
871
				psb->exch_busy = 0;
872
				psb->status = IOSTAT_SUCCESS;
873
				num_posted++;
874
			}
875
			list_add_tail(&psb->list, &scsi_sblist);
876 877
		}
	}
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905
	/* Push SCSI buffers with sgl posted to the availble list */
	while (!list_empty(&scsi_sblist)) {
		list_remove_head(&scsi_sblist, psb,
				 struct lpfc_scsi_buf, list);
		lpfc_release_scsi_buf_s4(phba, psb);
	}
	return num_posted;
}

/**
 * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine walks the list of scsi buffers that have been allocated and
 * repost them to the port by using SGL block post. This is needed after a
 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 *
 * Returns: 0 = success, non-zero failure.
 **/
int
lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
{
	LIST_HEAD(post_sblist);
	int num_posted, rc = 0;

	/* get all SCSI buffers need to repost to a local list */
906 907 908 909 910 911
	spin_lock_irq(&phba->scsi_buf_list_get_lock);
	spin_lock_irq(&phba->scsi_buf_list_put_lock);
	list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
	list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
	spin_unlock_irq(&phba->scsi_buf_list_put_lock);
	spin_unlock_irq(&phba->scsi_buf_list_get_lock);
912 913 914 915 916 917 918 919 920

	/* post the list of scsi buffer sgls to port if available */
	if (!list_empty(&post_sblist)) {
		num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
						phba->sli4_hba.scsi_xri_cnt);
		/* failed to post any scsi buffer, return error */
		if (num_posted == 0)
			rc = -EIO;
	}
921 922 923 924 925 926 927 928
	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.
 *
929
 * This routine allocates scsi buffers for device with SLI-4 interface spec,
930
 * the scsi buffer contains all the necessary information needed to initiate
931 932
 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 * them on a list, it post them to the port by using SGL block post.
933 934
 *
 * Return codes:
935
 *   int - number of scsi buffers that were allocated and posted.
936 937 938 939 940 941 942 943 944 945 946
 *   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;
947
	dma_addr_t pdma_phys_bpl;
948
	uint16_t iotag, lxri = 0;
949
	int bcnt, num_posted, sgl_size;
950 951 952
	LIST_HEAD(prep_sblist);
	LIST_HEAD(post_sblist);
	LIST_HEAD(scsi_sblist);
953

954 955 956 957 958 959 960 961 962
	sgl_size = phba->cfg_sg_dma_buf_size -
		(sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));

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

963 964 965 966 967
	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
		/*
968 969 970 971
		 * 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.
972 973 974 975 976 977 978 979 980
		 */
		psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
						GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}
		memset(psb->data, 0, phba->cfg_sg_dma_buf_size);

981 982 983 984 985 986 987 988 989
		/* Page alignment is CRITICAL, double check to be sure */
		if (((unsigned long)(psb->data) &
		    (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0) {
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
				      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}

990 991 992
		/* Allocate iotag for psb->cur_iocbq. */
		iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
		if (iotag == 0) {
993 994
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
				psb->data, psb->dma_handle);
995 996 997 998
			kfree(psb);
			break;
		}

999 1000
		lxri = lpfc_sli4_next_xritag(phba);
		if (lxri == NO_XRI) {
1001 1002 1003 1004 1005
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}
1006 1007
		psb->cur_iocbq.sli4_lxritag = lxri;
		psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
1008 1009
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
		psb->fcp_bpl = psb->data;
1010
		psb->fcp_cmnd = (psb->data + sgl_size);
1011 1012 1013 1014 1015 1016
		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;
1017
		pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
1018 1019 1020
		pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);

		/*
1021 1022 1023
		 * 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.
1024 1025 1026
		 */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
1027
		sgl->word2 = le32_to_cpu(sgl->word2);
1028 1029
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
1030
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
1031 1032 1033 1034 1035
		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));
1036
		sgl->word2 = le32_to_cpu(sgl->word2);
1037 1038
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
1039
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057

		/*
		 * 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;
1058
		psb->cur_iocbq.context1 = psb;
1059 1060
		psb->dma_phys_bpl = pdma_phys_bpl;

1061 1062
		/* add the scsi buffer to a post list */
		list_add_tail(&psb->list, &post_sblist);
1063
		spin_lock_irq(&phba->scsi_buf_list_get_lock);
1064
		phba->sli4_hba.scsi_xri_cnt++;
1065
		spin_unlock_irq(&phba->scsi_buf_list_get_lock);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
	}
	lpfc_printf_log(phba, KERN_INFO, LOG_BG,
			"3021 Allocate %d out of %d requested new SCSI "
			"buffers\n", bcnt, num_to_alloc);

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

	return num_posted;
1079 1080
}

1081
/**
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
 * 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);
}

/**
1100
 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1101
 * @phba: The HBA for which this call is being executed.
1102 1103 1104 1105 1106 1107 1108 1109
 *
 * 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
 **/
1110
static struct lpfc_scsi_buf*
1111
lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
已提交
1112
{
1113
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
	struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
	unsigned long gflag = 0;
	unsigned long pflag = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, gflag);
	list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
			 list);
	if (!lpfc_cmd) {
		spin_lock_irqsave(&phba->scsi_buf_list_put_lock, pflag);
		list_splice(&phba->lpfc_scsi_buf_list_put,
			    &phba->lpfc_scsi_buf_list_get);
		INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
		list_remove_head(scsi_buf_list_get, lpfc_cmd,
				 struct lpfc_scsi_buf, list);
		spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, pflag);
1129
	}
1130
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, gflag);
1131 1132
	return  lpfc_cmd;
}
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
/**
 * 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)
{
1147
	struct lpfc_scsi_buf *lpfc_cmd ;
1148 1149
	unsigned long gflag = 0;
	unsigned long pflag = 0;
1150 1151
	int found = 0;

1152 1153
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, gflag);
	list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list_get, list) {
1154
		if (lpfc_test_rrq_active(phba, ndlp,
1155
					 lpfc_cmd->cur_iocbq.sli4_lxritag))
1156 1157
			continue;
		list_del(&lpfc_cmd->list);
1158
		found = 1;
1159
		break;
1160
	}
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
	if (!found) {
		spin_lock_irqsave(&phba->scsi_buf_list_put_lock, pflag);
		list_splice(&phba->lpfc_scsi_buf_list_put,
			    &phba->lpfc_scsi_buf_list_get);
		INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
		spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, pflag);
		list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list_get,
				    list) {
			if (lpfc_test_rrq_active(
				phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
				continue;
			list_del(&lpfc_cmd->list);
			found = 1;
			break;
		}
	}
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, gflag);
1178 1179
	if (!found)
		return NULL;
1180
	return  lpfc_cmd;
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197
}
/**
 * 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
1198

1199
/**
1200
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1201 1202 1203 1204 1205 1206
 * @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.
 **/
1207
static void
1208
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1209
{
1210
	unsigned long iflag = 0;
已提交
1211

1212 1213 1214 1215 1216
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1217
	psb->pCmd = NULL;
1218
	psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1219 1220
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
	spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
已提交
1221 1222
}

1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
/**
 * 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;

1238 1239 1240 1241
	psb->seg_cnt = 0;
	psb->nonsg_phys = 0;
	psb->prot_seg_cnt = 0;

1242
	if (psb->exch_busy) {
1243 1244 1245 1246 1247 1248 1249 1250 1251
		spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
		psb->pCmd = NULL;
		list_add_tail(&psb->list,
			&phba->sli4_hba.lpfc_abts_scsi_buf_list);
		spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
	} else {
		psb->pCmd = NULL;
1252
		psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1253 1254 1255
		spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
		list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
		spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1256 1257 1258
	}
}

1259
/**
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
 * 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
1276 1277 1278 1279
 * @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
1280 1281 1282
 * 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.
1283 1284 1285 1286 1287
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
1288
static int
1289
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1290 1291 1292 1293 1294
{
	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;
1295
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
已提交
1296
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1297
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1298
	dma_addr_t physaddr;
1299
	uint32_t num_bde = 0;
1300
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1301 1302 1303 1304 1305 1306 1307 1308

	/*
	 * 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;
1309
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1310 1311 1312 1313 1314 1315 1316
		/*
		 * 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.
		 */

1317 1318 1319 1320 1321
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1322
		lpfc_cmd->seg_cnt = nseg;
已提交
1323
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1324 1325
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1326
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1327
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1328
			       lpfc_cmd->seg_cnt);
1329
			lpfc_cmd->seg_cnt = 0;
1330
			scsi_dma_unmap(scsi_cmnd);
已提交
1331 1332 1333 1334 1335 1336 1337 1338
			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.
1339 1340 1341
		 * 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
1342
		 */
1343
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1344
			physaddr = sg_dma_address(sgel);
1345
			if (phba->sli_rev == 3 &&
1346
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1347
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363
			    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
1364
		}
1365
	}
已提交
1366 1367 1368

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1369 1370 1371
	 * 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
1372
	 */
1373
	if (phba->sli_rev == 3 &&
1374 1375
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
		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
1391
			/* ebde count includes the response bde and data bpl */
1392 1393
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
L
Lucas De Marchi 已提交
1394
			/* ebde count includes the response bde and data bdes */
1395 1396 1397 1398 1399
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
1400
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1401
	}
1402
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1403 1404 1405 1406 1407

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1408
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1409 1410 1411
	return 0;
}

1412 1413 1414 1415 1416 1417 1418
static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
	return sc->device->sector_size;
}

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1419

1420 1421 1422 1423 1424 1425 1426 1427
/* Return if if error injection is detected by Initiator */
#define BG_ERR_INIT	0x1
/* Return if if error injection is detected by Target */
#define BG_ERR_TGT	0x2
/* Return if if swapping CSUM<-->CRC is required for error injection */
#define BG_ERR_SWAP	0x10
/* Return if disabling Guard/Ref/App checking is required for error injection */
#define BG_ERR_CHECK	0x20
1428 1429 1430 1431

/**
 * lpfc_bg_err_inject - Determine if we should inject an error
 * @phba: The Hba for which this call is being executed.
1432 1433 1434 1435 1436
 * @sc: The SCSI command to examine
 * @reftag: (out) BlockGuard reference tag for transmitted data
 * @apptag: (out) BlockGuard application tag for transmitted data
 * @new_guard (in) Value to replace CRC with if needed
 *
1437
 * Returns BG_ERR_* bit mask or 0 if request ignored
1438
 **/
1439 1440 1441 1442 1443 1444
static int
lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
{
	struct scatterlist *sgpe; /* s/g prot entry */
	struct scatterlist *sgde; /* s/g data entry */
1445
	struct lpfc_scsi_buf *lpfc_cmd = NULL;
1446
	struct scsi_dif_tuple *src = NULL;
1447 1448
	struct lpfc_nodelist *ndlp;
	struct lpfc_rport_data *rdata;
1449 1450 1451 1452 1453
	uint32_t op = scsi_get_prot_op(sc);
	uint32_t blksize;
	uint32_t numblks;
	sector_t lba;
	int rc = 0;
1454
	int blockoff = 0;
1455 1456 1457 1458

	if (op == SCSI_PROT_NORMAL)
		return 0;

1459 1460
	sgpe = scsi_prot_sglist(sc);
	sgde = scsi_sglist(sc);
1461
	lba = scsi_get_lba(sc);
1462 1463

	/* First check if we need to match the LBA */
1464 1465 1466 1467 1468 1469 1470 1471
	if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
		blksize = lpfc_cmd_blksize(sc);
		numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;

		/* Make sure we have the right LBA if one is specified */
		if ((phba->lpfc_injerr_lba < lba) ||
			(phba->lpfc_injerr_lba >= (lba + numblks)))
			return 0;
1472 1473 1474 1475 1476 1477 1478
		if (sgpe) {
			blockoff = phba->lpfc_injerr_lba - lba;
			numblks = sg_dma_len(sgpe) /
				sizeof(struct scsi_dif_tuple);
			if (numblks < blockoff)
				blockoff = numblks;
		}
1479 1480
	}

1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
	/* Next check if we need to match the remote NPortID or WWPN */
	rdata = sc->device->hostdata;
	if (rdata && rdata->pnode) {
		ndlp = rdata->pnode;

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

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

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

1508 1509
	/* Should we change the Reference Tag */
	if (reftag) {
1510 1511 1512
		if (phba->lpfc_injerr_wref_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1513 1514 1515 1516 1517 1518 1519 1520
				if (src) {
					/*
					 * For WRITE_PASS, force the error
					 * to be sent on the wire. It should
					 * be detected by the Target.
					 * If blockoff != 0 error will be
					 * inserted in middle of the IO.
					 */
1521 1522 1523 1524 1525

					lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9076 BLKGRD: Injecting reftag error: "
					"write lba x%lx + x%x oldrefTag x%x\n",
					(unsigned long)lba, blockoff,
1526
					be32_to_cpu(src->ref_tag));
1527

1528
					/*
1529 1530
					 * Save the old ref_tag so we can
					 * restore it on completion.
1531
					 */
1532 1533 1534 1535 1536 1537 1538 1539 1540
					if (lpfc_cmd) {
						lpfc_cmd->prot_data_type =
							LPFC_INJERR_REFTAG;
						lpfc_cmd->prot_data_segment =
							src;
						lpfc_cmd->prot_data =
							src->ref_tag;
					}
					src->ref_tag = cpu_to_be32(0xDEADBEEF);
1541
					phba->lpfc_injerr_wref_cnt--;
1542 1543 1544 1545 1546 1547 1548
					if (phba->lpfc_injerr_wref_cnt == 0) {
						phba->lpfc_injerr_nportid = 0;
						phba->lpfc_injerr_lba =
							LPFC_INJERR_LBA_OFF;
						memset(&phba->lpfc_injerr_wwpn,
						  0, sizeof(struct lpfc_name));
					}
1549 1550
					rc = BG_ERR_TGT | BG_ERR_CHECK;

1551 1552 1553
					break;
				}
				/* Drop thru */
1554
			case SCSI_PROT_WRITE_INSERT:
1555
				/*
1556 1557 1558
				 * For WRITE_INSERT, force the error
				 * to be sent on the wire. It should be
				 * detected by the Target.
1559
				 */
1560
				/* DEADBEEF will be the reftag on the wire */
1561 1562
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1563 1564 1565 1566 1567 1568 1569
				if (phba->lpfc_injerr_wref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
					LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1570
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1571 1572

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1573
					"9078 BLKGRD: Injecting reftag error: "
1574 1575
					"write lba x%lx\n", (unsigned long)lba);
				break;
1576
			case SCSI_PROT_WRITE_STRIP:
1577
				/*
1578 1579 1580
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1581
				 */
1582 1583
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1584 1585 1586 1587 1588 1589 1590
				if (phba->lpfc_injerr_wref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1591
				rc = BG_ERR_INIT;
1592 1593

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1594
					"9077 BLKGRD: Injecting reftag error: "
1595
					"write lba x%lx\n", (unsigned long)lba);
1596
				break;
1597
			}
1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608
		}
		if (phba->lpfc_injerr_rref_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
1609 1610
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_rref_cnt--;
1611 1612 1613 1614 1615 1616 1617
				if (phba->lpfc_injerr_rref_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1618
				rc = BG_ERR_INIT;
1619 1620

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1621
					"9079 BLKGRD: Injecting reftag error: "
1622
					"read lba x%lx\n", (unsigned long)lba);
1623
				break;
1624 1625 1626 1627 1628 1629
			}
		}
	}

	/* Should we change the Application Tag */
	if (apptag) {
1630 1631 1632
		if (phba->lpfc_injerr_wapp_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1633
				if (src) {
1634 1635 1636 1637 1638 1639 1640 1641
					/*
					 * For WRITE_PASS, force the error
					 * to be sent on the wire. It should
					 * be detected by the Target.
					 * If blockoff != 0 error will be
					 * inserted in middle of the IO.
					 */

1642 1643 1644 1645
					lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9080 BLKGRD: Injecting apptag error: "
					"write lba x%lx + x%x oldappTag x%x\n",
					(unsigned long)lba, blockoff,
1646
					be16_to_cpu(src->app_tag));
1647 1648

					/*
1649 1650
					 * Save the old app_tag so we can
					 * restore it on completion.
1651
					 */
1652 1653 1654 1655 1656 1657 1658 1659 1660
					if (lpfc_cmd) {
						lpfc_cmd->prot_data_type =
							LPFC_INJERR_APPTAG;
						lpfc_cmd->prot_data_segment =
							src;
						lpfc_cmd->prot_data =
							src->app_tag;
					}
					src->app_tag = cpu_to_be16(0xDEAD);
1661
					phba->lpfc_injerr_wapp_cnt--;
1662 1663 1664 1665 1666 1667 1668
					if (phba->lpfc_injerr_wapp_cnt == 0) {
						phba->lpfc_injerr_nportid = 0;
						phba->lpfc_injerr_lba =
							LPFC_INJERR_LBA_OFF;
						memset(&phba->lpfc_injerr_wwpn,
						  0, sizeof(struct lpfc_name));
					}
1669
					rc = BG_ERR_TGT | BG_ERR_CHECK;
1670 1671 1672
					break;
				}
				/* Drop thru */
1673
			case SCSI_PROT_WRITE_INSERT:
1674
				/*
1675 1676 1677
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1678
				 */
1679
				/* DEAD will be the apptag on the wire */
1680 1681
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1682 1683 1684 1685 1686 1687 1688
				if (phba->lpfc_injerr_wapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1689
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1690

1691
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1692
					"0813 BLKGRD: Injecting apptag error: "
1693 1694
					"write lba x%lx\n", (unsigned long)lba);
				break;
1695
			case SCSI_PROT_WRITE_STRIP:
1696
				/*
1697 1698 1699
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1700
				 */
1701 1702
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1703 1704 1705 1706 1707 1708 1709
				if (phba->lpfc_injerr_wapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1710
				rc = BG_ERR_INIT;
1711 1712

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1713
					"0812 BLKGRD: Injecting apptag error: "
1714
					"write lba x%lx\n", (unsigned long)lba);
1715
				break;
1716
			}
1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
		}
		if (phba->lpfc_injerr_rapp_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
1728 1729
				*apptag = 0xDEAD;
				phba->lpfc_injerr_rapp_cnt--;
1730 1731 1732 1733 1734 1735 1736
				if (phba->lpfc_injerr_rapp_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1737
				rc = BG_ERR_INIT;
1738 1739

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1740
					"0814 BLKGRD: Injecting apptag error: "
1741
					"read lba x%lx\n", (unsigned long)lba);
1742
				break;
1743 1744 1745 1746
			}
		}
	}

1747

1748
	/* Should we change the Guard Tag */
1749 1750 1751 1752
	if (new_guard) {
		if (phba->lpfc_injerr_wgrd_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1753
				rc = BG_ERR_CHECK;
1754
				/* Drop thru */
1755 1756

			case SCSI_PROT_WRITE_INSERT:
1757
				/*
1758 1759 1760
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1761 1762
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1763 1764 1765 1766 1767 1768 1769
				if (phba->lpfc_injerr_wgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1770

1771
				rc |= BG_ERR_TGT | BG_ERR_SWAP;
1772
				/* Signals the caller to swap CRC->CSUM */
1773

1774
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1775
					"0817 BLKGRD: Injecting guard error: "
1776 1777
					"write lba x%lx\n", (unsigned long)lba);
				break;
1778
			case SCSI_PROT_WRITE_STRIP:
1779
				/*
1780 1781 1782
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1783 1784
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1785 1786 1787 1788 1789 1790 1791
				if (phba->lpfc_injerr_wgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1792

1793
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1794 1795 1796
				/* Signals the caller to swap CRC->CSUM */

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1797
					"0816 BLKGRD: Injecting guard error: "
1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
					"write lba x%lx\n", (unsigned long)lba);
				break;
			}
		}
		if (phba->lpfc_injerr_rgrd_cnt) {
			switch (op) {
			case SCSI_PROT_READ_INSERT:
			case SCSI_PROT_READ_STRIP:
			case SCSI_PROT_READ_PASS:
				/*
				 * For READ_STRIP and READ_PASS, force the
				 * error on data being read off the wire. It
				 * should force an IO error to the driver.
				 */
				phba->lpfc_injerr_rgrd_cnt--;
1813 1814 1815 1816 1817 1818 1819
				if (phba->lpfc_injerr_rgrd_cnt == 0) {
					phba->lpfc_injerr_nportid = 0;
					phba->lpfc_injerr_lba =
						LPFC_INJERR_LBA_OFF;
					memset(&phba->lpfc_injerr_wwpn,
						0, sizeof(struct lpfc_name));
				}
1820

1821
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1822 1823 1824 1825 1826 1827
				/* Signals the caller to swap CRC->CSUM */

				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"0818 BLKGRD: Injecting guard error: "
					"read lba x%lx\n", (unsigned long)lba);
			}
1828 1829
		}
	}
1830

1831 1832 1833 1834
	return rc;
}
#endif

1835 1836 1837 1838
/**
 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
 * the specified SCSI command.
 * @phba: The Hba for which this call is being executed.
1839 1840 1841 1842 1843 1844
 * @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
 *
1845
 **/
1846
static int
1847 1848
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1849 1850
{
	uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1851
	uint8_t ret = 0;
1852 1853 1854 1855 1856

	if (guard_type == SHOST_DIX_GUARD_IP) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1857
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1858
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1859 1860 1861 1862
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1863
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1864
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1865 1866
			break;

1867 1868
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1869
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1870
			*txop = BG_OP_IN_CSUM_OUT_CRC;
1871 1872 1873 1874
			break;

		case SCSI_PROT_NORMAL:
		default:
1875
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1876 1877
				"9063 BLKGRD: Bad op/guard:%d/IP combination\n",
					scsi_get_prot_op(sc));
1878
			ret = 1;
1879 1880 1881
			break;

		}
J
James Smart 已提交
1882
	} else {
1883 1884 1885
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1886
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1887
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1888 1889 1890 1891
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1892
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1893
			*txop = BG_OP_IN_CRC_OUT_CRC;
1894 1895 1896 1897
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
J
James Smart 已提交
1898
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1899
			*txop = BG_OP_IN_CRC_OUT_NODIF;
J
James Smart 已提交
1900 1901
			break;

1902 1903
		case SCSI_PROT_NORMAL:
		default:
1904
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
J
James Smart 已提交
1905 1906
				"9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
					scsi_get_prot_op(sc));
1907
			ret = 1;
1908 1909 1910 1911
			break;
		}
	}

1912
	return ret;
1913 1914
}

1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/**
 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
 * the specified SCSI command in order to force a guard tag error.
 * @phba: The Hba for which this call is being executed.
 * @sc: The SCSI command to examine
 * @txopt: (out) BlockGuard operation for transmitted data
 * @rxopt: (out) BlockGuard operation for received data
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
 **/
static int
lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
{
	uint8_t guard_type = scsi_host_get_guard(sc->device->host);
	uint8_t ret = 0;

	if (guard_type == SHOST_DIX_GUARD_IP) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1939
			*txop = BG_OP_IN_CRC_OUT_NODIF;
1940 1941 1942 1943 1944
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1945
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1946 1947 1948 1949
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1950
			*rxop = BG_OP_IN_CSUM_OUT_CRC;
1951
			*txop = BG_OP_IN_CRC_OUT_CSUM;
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
			break;

		case SCSI_PROT_NORMAL:
		default:
			break;

		}
	} else {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1964
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1965 1966 1967 1968
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1969
			*rxop = BG_OP_IN_CSUM_OUT_CSUM;
1970
			*txop = BG_OP_IN_CSUM_OUT_CSUM;
1971 1972 1973 1974 1975
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1976
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996
			break;

		case SCSI_PROT_NORMAL:
		default:
			break;
		}
	}

	return ret;
}
#endif

/**
 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 *
 * This function sets up BPL buffer list for protection groups of
1997 1998 1999 2000 2001 2002 2003 2004 2005
 * 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:
 *                                +-------------------------+
2006 2007 2008
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
2009 2010 2011 2012 2013 2014 2015 2016
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
2017 2018 2019
 *
 * Returns the number of BDEs added to the BPL.
 **/
2020 2021 2022 2023 2024
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 */
2025 2026
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
2027
	dma_addr_t physaddr;
2028
	int i = 0, num_bde = 0, status;
2029
	int datadir = sc->sc_data_direction;
2030
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2031
	uint32_t rc;
2032
#endif
2033
	uint32_t checking = 1;
2034
	uint32_t reftag;
J
James Smart 已提交
2035
	unsigned blksize;
2036
	uint8_t txop, rxop;
2037

2038 2039
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
2040 2041
		goto out;

2042
	/* extract some info from the scsi command for pde*/
2043
	blksize = lpfc_cmd_blksize(sc);
2044
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2045

2046
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2047
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2048
	if (rc) {
2049
		if (rc & BG_ERR_SWAP)
2050
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2051
		if (rc & BG_ERR_CHECK)
2052 2053
			checking = 0;
	}
2054 2055
#endif

2056 2057 2058 2059 2060
	/* 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);

2061
	/* Endianness conversion if necessary for PDE5 */
2062
	pde5->word0 = cpu_to_le32(pde5->word0);
J
James Smart 已提交
2063
	pde5->reftag = cpu_to_le32(reftag);
2064

2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
	/* 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);
2075 2076 2077 2078 2079

	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
2080
	if (datadir == DMA_FROM_DEVICE) {
2081 2082 2083 2084 2085 2086 2087 2088 2089
		if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

		if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);
2090 2091
	}
	bf_set(pde6_ai, pde6, 1);
J
James Smart 已提交
2092 2093
	bf_set(pde6_ae, pde6, 0);
	bf_set(pde6_apptagval, pde6, 0);
2094

2095
	/* Endianness conversion if necessary for PDE6 */
2096 2097 2098 2099
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

2100
	/* advance bpl and increment bde count */
2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122
	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;
}

2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
/**
 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 * @protcnt: number of segment of protection data that have been dma mapped
 *
 * This function sets up BPL buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF
2133 2134 2135 2136 2137 2138 2139 2140 2141
 *
 * 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:
 *                                    +-------------------------+
2142
 *   start of first prot group  -->   |          PDE_5          |
2143
 *                                    +-------------------------+
2144 2145 2146
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
2147 2148 2149 2150 2151
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
2152
 *   start of new  prot group  -->    |          PDE_5          |
2153 2154 2155 2156 2157 2158
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
2159 2160 2161
 *
 * Returns the number of BDEs added to the BPL.
 **/
2162 2163 2164 2165 2166 2167
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 */
2168 2169
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
2170
	struct lpfc_pde7 *pde7 = NULL;
2171 2172
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
2173 2174
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2175 2176
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
2177
	int status;
2178 2179 2180
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
2181
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2182
	uint32_t rc;
2183
#endif
2184
	uint32_t checking = 1;
2185
	uint32_t reftag;
2186
	uint8_t txop, rxop;
2187 2188 2189 2190 2191 2192 2193
	int num_bde = 0;

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

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207
				"9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
				sgpe, sgde);
		return 0;
	}

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

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

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2208
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2209
	if (rc) {
2210
		if (rc & BG_ERR_SWAP)
2211
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2212
		if (rc & BG_ERR_CHECK)
2213 2214 2215 2216 2217 2218
			checking = 0;
	}
#endif

	split_offset = 0;
	do {
2219 2220 2221 2222
		/* Check to see if we ran out of space */
		if (num_bde >= (phba->cfg_total_seg_cnt - 2))
			return num_bde + 3;

2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241
		/* setup PDE5 with what we have */
		pde5 = (struct lpfc_pde5 *) bpl;
		memset(pde5, 0, sizeof(struct lpfc_pde5));
		bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);

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

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

		/* setup PDE6 with the rest of the info */
		memset(pde6, 0, sizeof(struct lpfc_pde6));
		bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
		bf_set(pde6_optx, pde6, txop);
		bf_set(pde6_oprx, pde6, rxop);
2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252

		if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

		if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);

2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299
		bf_set(pde6_ai, pde6, 1);
		bf_set(pde6_ae, pde6, 0);
		bf_set(pde6_apptagval, pde6, 0);

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

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

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

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

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

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

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

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

		num_bde++;

		/* setup BDE's for data blocks associated with DIF data */
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
2300 2301 2302 2303
			/* Check to see if we ran out of space */
			if (num_bde >= phba->cfg_total_seg_cnt)
				return num_bde + 1;

2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417
			if (!sgde) {
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9065 BLKGRD:%s Invalid data segment\n",
						__func__);
				return 0;
			}
			bpl++;
			dataphysaddr = sg_dma_address(sgde) + split_offset;
			bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
			bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));

			remainder = sg_dma_len(sgde) - split_offset;

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

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

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

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

			num_bde++;
			curr_data++;

			if (split_offset)
				break;

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

		}

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

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

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

	} while (!alldone);
out:

	return num_bde;
}

/**
 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @sgl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 *
 * This function sets up SGL buffer list for protection groups of
 * type LPFC_PG_TYPE_NO_DIF
 *
 * This is usually used when the HBA is instructed to generate
 * DIFs and insert them into data stream (or strip DIF from
 * incoming data stream)
 *
 * The buffer list consists of just one protection group described
 * below:
 *                                +-------------------------+
 *   start of prot group  -->     |         DI_SEED         |
 *                                +-------------------------+
 *                                |         Data SGE        |
 *                                +-------------------------+
 *                                |more Data SGE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
 *
 * Returns the number of SGEs added to the SGL.
 **/
static int
lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct sli4_sge *sgl, int datasegcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct sli4_sge_diseed *diseed = NULL;
	dma_addr_t physaddr;
	int i = 0, num_sge = 0, status;
	uint32_t reftag;
	unsigned blksize;
	uint8_t txop, rxop;
2418
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2419
	uint32_t rc;
2420
#endif
2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433
	uint32_t checking = 1;
	uint32_t dma_len;
	uint32_t dma_offset = 0;

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

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

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2434
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2435
	if (rc) {
2436
		if (rc & BG_ERR_SWAP)
2437
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2438
		if (rc & BG_ERR_CHECK)
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451
			checking = 0;
	}
#endif

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

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

2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467
	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
	if (sc->sc_data_direction == DMA_FROM_DEVICE) {
		if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);

		if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
	}

2468 2469 2470
	/* setup DISEED with the rest of the info */
	bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
	bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2471

2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562
	bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
	bf_set(lpfc_sli4_sge_dif_me, diseed, 0);

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

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

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

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

		sgl++;
		num_sge++;
	}

out:
	return num_sge;
}

/**
 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 * @sgl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 * @protcnt: number of segment of protection data that have been dma mapped
 *
 * This function sets up SGL buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF
 *
 * This is usually used when DIFs are in their own buffers,
 * separate from the data. The HBA can then by instructed
 * to place the DIFs in the outgoing stream.  For read operations,
 * The HBA could extract the DIFs and place it in DIF buffers.
 *
 * The buffer list for this type consists of one or more of the
 * protection groups described below:
 *                                    +-------------------------+
 *   start of first prot group  -->   |         DISEED          |
 *                                    +-------------------------+
 *                                    |      DIF (Prot SGE)     |
 *                                    +-------------------------+
 *                                    |        Data SGE         |
 *                                    +-------------------------+
 *                                    |more Data SGE's ... (opt)|
 *                                    +-------------------------+
 *   start of new  prot group  -->    |         DISEED          |
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
 *
 * Returns the number of SGEs added to the SGL.
 **/
static int
lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct sli4_sge *sgl, int datacnt, int protcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct scatterlist *sgpe = NULL; /* s/g prot entry */
	struct sli4_sge_diseed *diseed = NULL;
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
	int status;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
	uint32_t reftag;
	uint8_t txop, rxop;
	uint32_t dma_len;
2563
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2564
	uint32_t rc;
2565
#endif
2566 2567 2568 2569 2570 2571 2572 2573 2574 2575
	uint32_t checking = 1;
	uint32_t dma_offset = 0;
	int num_sge = 0;

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

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2576 2577 2578 2579
				sgpe, sgde);
		return 0;
	}

2580 2581
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
2582 2583
		goto out;

2584
	/* extract some info from the scsi command */
2585
	blksize = lpfc_cmd_blksize(sc);
2586
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2587

2588
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2589
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2590
	if (rc) {
2591
		if (rc & BG_ERR_SWAP)
2592
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2593
		if (rc & BG_ERR_CHECK)
2594 2595
			checking = 0;
	}
2596 2597
#endif

2598 2599
	split_offset = 0;
	do {
2600 2601 2602 2603
		/* Check to see if we ran out of space */
		if (num_sge >= (phba->cfg_total_seg_cnt - 2))
			return num_sge + 3;

2604 2605 2606 2607 2608 2609 2610 2611 2612
		/* setup DISEED with what we have */
		diseed = (struct sli4_sge_diseed *) sgl;
		memset(diseed, 0, sizeof(struct sli4_sge_diseed));
		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);

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

2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636
		if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK)) {
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);

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


		if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);

2637 2638 2639
		/* setup DISEED with the rest of the info */
		bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
		bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2640

2641 2642 2643 2644 2645 2646 2647 2648 2649 2650
		bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
		bf_set(lpfc_sli4_sge_dif_me, diseed, 0);

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

		/* advance sgl and increment bde count */
		num_sge++;
		sgl++;
2651 2652

		/* setup the first BDE that points to protection buffer */
2653 2654
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2655 2656 2657 2658

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

2659 2660 2661 2662 2663 2664
		/* Now setup DIF SGE */
		sgl->word2 = 0;
		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
		sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
		sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
		sgl->word2 = cpu_to_le32(sgl->word2);
2665

2666 2667 2668
		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

2669 2670 2671
		/* check if DIF SGE is crossing the 4K boundary; if so split */
		if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
			protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2672 2673
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
J
James Smart 已提交
2674
			protgrp_bytes = protgrp_blks * blksize;
2675 2676 2677 2678
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}
2679

2680
		num_sge++;
2681

2682
		/* setup SGE's for data blocks associated with DIF data */
2683 2684 2685
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
2686 2687 2688 2689
			/* Check to see if we ran out of space */
			if (num_sge >= phba->cfg_total_seg_cnt)
				return num_sge + 1;

2690
			if (!sgde) {
2691
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2692
					"9086 BLKGRD:%s Invalid data segment\n",
2693 2694 2695
						__func__);
				return 0;
			}
2696
			sgl++;
2697 2698 2699 2700 2701 2702
			dataphysaddr = sg_dma_address(sgde) + split_offset;

			remainder = sg_dma_len(sgde) - split_offset;

			if ((subtotal + remainder) <= protgrp_bytes) {
				/* we can use this whole buffer */
2703
				dma_len = remainder;
2704 2705 2706 2707 2708 2709
				split_offset = 0;

				if ((subtotal + remainder) == protgrp_bytes)
					pgdone = 1;
			} else {
				/* must split this buffer with next prot grp */
2710 2711
				dma_len = protgrp_bytes - subtotal;
				split_offset += dma_len;
2712 2713
			}

2714
			subtotal += dma_len;
2715

2716 2717 2718 2719 2720
			sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
			bf_set(lpfc_sli4_sge_last, sgl, 0);
			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2721

2722 2723 2724 2725
			sgl->sge_len = cpu_to_le32(dma_len);
			dma_offset += dma_len;

			num_sge++;
2726 2727 2728 2729 2730 2731 2732 2733 2734
			curr_data++;

			if (split_offset)
				break;

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

2735 2736 2737
		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
2738
			sgl++;
2739 2740 2741
			continue;
		}

2742 2743
		/* are we done ? */
		if (curr_prot == protcnt) {
2744
			bf_set(lpfc_sli4_sge_last, sgl, 1);
2745 2746 2747 2748
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);
2749
			sgl++;
2750 2751 2752 2753 2754

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
2755
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2756
				"9085 BLKGRD: bug in %s\n", __func__);
2757 2758 2759
		}

	} while (!alldone);
2760

2761 2762
out:

2763
	return num_sge;
2764
}
2765

2766 2767 2768 2769 2770
/**
 * lpfc_prot_group_type - Get prtotection group type of SCSI command
 * @phba: The Hba for which this call is being executed.
 * @sc: pointer to scsi command we're working on
 *
2771 2772 2773
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
2774 2775 2776
 * Returns: Protection group type (with or without DIF)
 *
 **/
2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802
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;
}

2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843
/**
 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be adjusted.
 *
 * Adjust the data length to account for how much data
 * is actually on the wire.
 *
 * returns the adjusted data length
 **/
static int
lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
		       struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *sc = lpfc_cmd->pCmd;
	int fcpdl;

	fcpdl = scsi_bufflen(sc);

	/* Check if there is protection data on the wire */
	if (sc->sc_data_direction == DMA_FROM_DEVICE) {
		/* Read */
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
			return fcpdl;

	} else {
		/* Write */
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
			return fcpdl;
	}

	/*
	 * If we are in DIF Type 1 mode every data block has a 8 byte
	 * DIF (trailer) attached to it. Must ajust FCP data length.
	 */
	if (scsi_prot_flagged(sc, SCSI_PROT_TRANSFER_PI))
		fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;

	return fcpdl;
}

2844 2845 2846 2847 2848
/**
 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
 *
2849 2850 2851
 * 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
2852
 **/
2853
static int
2854
lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2855 2856 2857 2858 2859 2860 2861 2862 2863
		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;
2864
	int fcpdl;
2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884

	/*
	 * 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;
2885 2886 2887 2888

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
2889 2890 2891 2892 2893

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
2894 2895 2896 2897 2898

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

2899 2900
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
2901
			/* we should have 2 or more entries in buffer list */
2902 2903 2904
			if (num_bde < 2)
				goto err;
			break;
2905 2906

		case LPFC_PG_TYPE_DIF_BUF:
2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920
			/*
			 * 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;
2921 2922 2923 2924 2925 2926 2927 2928

			/*
			 * There is a minimun of 4 BPLs used for every
			 * protection data segment.
			 */
			if ((lpfc_cmd->prot_seg_cnt * 4) >
			    (phba->cfg_total_seg_cnt - 2))
				goto err;
2929 2930 2931

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
2932
			/* we should have 3 or more entries in buffer list */
2933 2934
			if ((num_bde < 3) ||
			    (num_bde > phba->cfg_total_seg_cnt))
2935 2936
				goto err;
			break;
2937

2938 2939
		case LPFC_PG_TYPE_INVALID:
		default:
2940 2941 2942
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960
			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;

2961
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2962 2963 2964 2965 2966 2967 2968 2969
	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
2970
	return 0;
2971
err:
2972 2973 2974 2975 2976 2977 2978
	if (lpfc_cmd->seg_cnt)
		scsi_dma_unmap(scsi_cmnd);
	if (lpfc_cmd->prot_seg_cnt)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
			     scsi_prot_sg_count(scsi_cmnd),
			     scsi_cmnd->sc_data_direction);

2979
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2980 2981 2982 2983
			"9023 Cannot setup S/G List for HBA"
			"IO segs %d/%d BPL %d SCSI %d: %d %d\n",
			lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
			phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2984
			prot_group_type, num_bde);
2985 2986 2987

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
2988 2989 2990
	return 1;
}

2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075
/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CRC algorithmn
 * using crc_t10dif.
 */
uint16_t
lpfc_bg_crc(uint8_t *data, int count)
{
	uint16_t crc = 0;
	uint16_t x;

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

/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CSUM algorithmn
 * using ip_compute_csum.
 */
uint16_t
lpfc_bg_csum(uint8_t *data, int count)
{
	uint16_t ret;

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

/*
 * This function examines the protection data to try to determine
 * what type of T10-DIF error occurred.
 */
void
lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scatterlist *sgpe; /* s/g prot entry */
	struct scatterlist *sgde; /* s/g data entry */
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	struct scsi_dif_tuple *src = NULL;
	uint8_t *data_src = NULL;
	uint16_t guard_tag, guard_type;
	uint16_t start_app_tag, app_tag;
	uint32_t start_ref_tag, ref_tag;
	int prot, protsegcnt;
	int err_type, len, data_len;
	int chk_ref, chk_app, chk_guard;
	uint16_t sum;
	unsigned blksize;

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

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

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

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

	if (sgpe && protsegcnt) {

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

3076
		start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198
		start_app_tag = src->app_tag;
		src = (struct scsi_dif_tuple *)sg_virt(sgpe);
		len = sgpe->length;
		while (src && protsegcnt) {
			while (len) {

				/*
				 * First check to see if a protection data
				 * check is valid
				 */
				if ((src->ref_tag == 0xffffffff) ||
				    (src->app_tag == 0xffff)) {
					start_ref_tag++;
					goto skipit;
				}

				/* App Tag checking */
				app_tag = src->app_tag;
				if (chk_app && (app_tag != start_app_tag)) {
					err_type = BGS_APPTAG_ERR_MASK;
					goto out;
				}

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

				/* Guard Tag checking */
				if (chk_guard) {
					guard_tag = src->guard_tag;
					if (guard_type == SHOST_DIX_GUARD_IP)
						sum = lpfc_bg_csum(data_src,
								   blksize);
					else
						sum = lpfc_bg_crc(data_src,
								  blksize);
					if ((guard_tag != sum)) {
						err_type = BGS_GUARD_ERR_MASK;
						goto out;
					}
				}
skipit:
				len -= sizeof(struct scsi_dif_tuple);
				if (len < 0)
					len = 0;
				src++;

				data_src += blksize;
				data_len -= blksize;

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

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

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

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

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

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

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


3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223
/*
 * This function checks for BlockGuard errors detected by
 * the HBA.  In case of errors, the ASC/ASCQ fields in the
 * sense buffer will be set accordingly, paired with
 * ILLEGAL_REQUEST to signal to the kernel that the HBA
 * detected corruption.
 *
 * Returns:
 *  0 - No error found
 *  1 - BlockGuard error found
 * -1 - Internal error (bad profile, ...etc)
 */
static int
lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
			struct lpfc_iocbq *pIocbOut)
{
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
	int ret = 0;
	uint32_t bghm = bgf->bghm;
	uint32_t bgstat = bgf->bgstat;
	uint64_t failing_sector = 0;

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
3224 3225
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
3226
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3227
		lpfc_debug_save_data(phba, cmd);
3228 3229 3230 3231

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
3232 3233 3234 3235
			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);
3236 3237 3238 3239 3240 3241 3242 3243
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
3244 3245 3246 3247 3248 3249
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9072 BLKGRD: Invalid BG Profile in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3250 3251 3252 3253 3254 3255
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
3256 3257 3258 3259 3260 3261
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9073 BLKGRD: Invalid BG PDIF Block in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3262 3263 3264 3265 3266 3267 3268 3269 3270
		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
3271
		cmd->result = DRIVER_SENSE << 24
3272 3273
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
3274 3275 3276 3277 3278 3279
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9055 BLKGRD: Guard Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3280 3281 3282 3283 3284 3285 3286
	}

	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
3287
		cmd->result = DRIVER_SENSE << 24
3288 3289 3290
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
3291 3292 3293 3294 3295 3296
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9056 BLKGRD: Ref Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3297 3298 3299 3300 3301 3302 3303
	}

	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
3304
		cmd->result = DRIVER_SENSE << 24
3305 3306 3307
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
3308 3309 3310 3311 3312 3313
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9061 BLKGRD: App Tag error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);
3314 3315 3316 3317 3318
	}

	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
3319 3320 3321
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
3322
		 */
J
James Smart 已提交
3323 3324 3325 3326
		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 */
3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341

		/* bghm is a "on the wire" FC frame based count */
		switch (scsi_get_prot_op(cmd)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			bghm /= cmd->device->sector_size;
			break;
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
			bghm /= (cmd->device->sector_size +
				sizeof(struct scsi_dif_tuple));
			break;
		}
3342 3343 3344 3345

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

J
James Smart 已提交
3346 3347
		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3348 3349 3350 3351
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
3352 3353 3354 3355 3356 3357 3358 3359 3360
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9057 BLKGRD: Unknown error in cmd"
				" 0x%x lba 0x%llx blk cnt 0x%x "
				"bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
				(unsigned long long)scsi_get_lba(cmd),
				blk_rq_sectors(cmd->request), bgstat, bghm);

		/* Calcuate what type of error it was */
		lpfc_calc_bg_err(phba, lpfc_cmd);
3361 3362 3363
	}
out:
	return ret;
已提交
3364 3365
}

3366 3367 3368 3369 3370 3371 3372 3373 3374
/**
 * 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:
3375 3376
 *	1 - Error
 *	0 - Success
3377 3378 3379 3380 3381 3382 3383 3384
 **/
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;
3385
	struct sli4_sge *first_data_sgl;
3386 3387 3388 3389 3390 3391
	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;
3392
	struct ulp_bde64 *bde;
3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416

	/*
	 * 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;
3417
		first_data_sgl = sgl;
3418 3419
		lpfc_cmd->seg_cnt = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3420 3421 3422 3423
			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,
3424
			       lpfc_cmd->seg_cnt);
3425
			lpfc_cmd->seg_cnt = 0;
3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443
			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));
3444
			sgl->word2 = le32_to_cpu(sgl->word2);
3445 3446 3447 3448 3449
			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);
3450
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3451
			sgl->word2 = cpu_to_le32(sgl->word2);
3452
			sgl->sge_len = cpu_to_le32(dma_len);
3453 3454 3455
			dma_offset += dma_len;
			sgl++;
		}
3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466
		/* 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);
		}
3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490
	} 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;
}

3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507
/**
 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
 * two functions eventually, but for now, it's here
 **/
static int
lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
		struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3508
	uint32_t num_sge = 0;
3509 3510 3511 3512 3513 3514
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
	int fcpdl;

	/*
	 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3515
	 *  fcp_rsp regions to the first data sge entry
3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537
	 */
	if (scsi_sg_count(scsi_cmnd)) {
		/*
		 * The driver stores the segment count returned from pci_map_sg
		 * because this a count of dma-mappings used to map the use_sg
		 * pages.  They are not guaranteed to be the same for those
		 * architectures that implement an IOMMU.
		 */
		datasegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_sglist(scsi_cmnd),
					scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!datasegcnt))
			return 1;

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

		sgl += 1;
		lpfc_cmd->seg_cnt = datasegcnt;
3538 3539 3540 3541

		/* First check if data segment count from SCSI Layer is good */
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
			goto err;
3542 3543 3544 3545 3546

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
3547 3548 3549 3550 3551
			/* Here we need to add a DISEED to the count */
			if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
				goto err;

			num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3552
					datasegcnt);
3553

3554
			/* we should have 2 or more entries in buffer list */
3555
			if (num_sge < 2)
3556 3557
				goto err;
			break;
3558 3559

		case LPFC_PG_TYPE_DIF_BUF:
3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573
			/*
			 * 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;
3574 3575 3576 3577 3578 3579 3580
			/*
			 * There is a minimun of 3 SGEs used for every
			 * protection data segment.
			 */
			if ((lpfc_cmd->prot_seg_cnt * 3) >
			    (phba->cfg_total_seg_cnt - 2))
				goto err;
3581

3582
			num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3583
					datasegcnt, protsegcnt);
3584

3585
			/* we should have 3 or more entries in buffer list */
3586 3587
			if ((num_sge < 3) ||
			    (num_sge > phba->cfg_total_seg_cnt))
3588 3589
				goto err;
			break;
3590

3591 3592
		case LPFC_PG_TYPE_INVALID:
		default:
3593 3594 3595
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

3596 3597 3598 3599 3600 3601 3602
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9083 Unexpected protection group %i\n",
					prot_group_type);
			return 1;
		}
	}

3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617
	switch (scsi_get_prot_op(scsi_cmnd)) {
	case SCSI_PROT_WRITE_STRIP:
	case SCSI_PROT_READ_STRIP:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
		break;
	case SCSI_PROT_WRITE_INSERT:
	case SCSI_PROT_READ_INSERT:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
		break;
	case SCSI_PROT_WRITE_PASS:
	case SCSI_PROT_READ_PASS:
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
		break;
	}

3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
	fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);

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

	return 0;
err:
3629 3630 3631 3632 3633 3634 3635
	if (lpfc_cmd->seg_cnt)
		scsi_dma_unmap(scsi_cmnd);
	if (lpfc_cmd->prot_seg_cnt)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
			     scsi_prot_sg_count(scsi_cmnd),
			     scsi_cmnd->sc_data_direction);

3636
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3637 3638 3639 3640 3641 3642 3643 3644
			"9084 Cannot setup S/G List for HBA"
			"IO segs %d/%d SGL %d SCSI %d: %d %d\n",
			lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
			phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
			prot_group_type, num_sge);

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
3645 3646 3647
	return 1;
}

3648 3649 3650 3651 3652 3653 3654 3655 3656
/**
 * 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:
3657 3658
 *	1 - Error
 *	0 - Success
3659 3660 3661 3662 3663 3664 3665
 **/
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);
}

3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684
/**
 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
 * using BlockGuard.
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine wraps the actual DMA mapping function pointer from the
 * lpfc_hba struct.
 *
 * Return codes:
 *	1 - Error
 *	0 - Success
 **/
static inline int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
}

3685
/**
3686
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706
 * @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;

3707 3708 3709
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778
	/* 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;
}
3779 3780

/**
3781
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3782
 * @phba: The HBA for which this call is being executed.
3783 3784 3785
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
3786
 * field of @lpfc_cmd for device with SLI-3 interface spec.
3787
 **/
3788
static void
3789
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3790 3791 3792 3793 3794 3795 3796
{
	/*
	 * 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.
	 */
3797 3798
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
3799 3800 3801 3802
	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);
3803 3804
}

3805
/**
3806
 * lpfc_handler_fcp_err - FCP response handler
3807 3808 3809 3810 3811 3812 3813 3814
 * @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
3815
static void
J
James Smart 已提交
3816 3817
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
3818 3819 3820 3821
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3822
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
3823 3824
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
3825
	uint32_t *lp;
已提交
3826 3827
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
3828
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
3829

3830

已提交
3831 3832 3833 3834 3835 3836 3837 3838 3839 3840
	/*
	 *  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;
	}

3841 3842
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
3843
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3844 3845 3846 3847 3848 3849 3850 3851 3852
			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;
		}
3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863
		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;
		}
3864 3865
	}

3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876
	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;

3877 3878 3879 3880 3881 3882 3883 3884 3885
	/* special handling for under run conditions */
	if (!scsi_status && (resp_info & RESID_UNDER)) {
		/* don't log under runs if fcp set... */
		if (vport->cfg_log_verbose & LOG_FCP)
			logit = LOG_FCP_ERROR;
		/* unless operator says so */
		if (vport->cfg_log_verbose & LOG_FCP_UNDER)
			logit = LOG_FCP_UNDER;
	}
3886

3887
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
3888
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3889 3890 3891 3892 3893 3894 3895
			 "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
3896

3897
	scsi_set_resid(cmnd, 0);
已提交
3898
	if (resp_info & RESID_UNDER) {
3899
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
3900

3901
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3902
				 "9025 FCP Read Underrun, expected %d, "
3903 3904 3905 3906
				 "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
3907

3908 3909 3910 3911 3912 3913 3914
		/*
		 * 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 &&
3915
			(scsi_get_resid(cmnd) != fcpi_parm)) {
3916 3917
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
3918
					 "9026 FCP Read Check Error "
3919 3920 3921 3922
					 "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]);
3923
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3924 3925
			host_status = DID_ERROR;
		}
已提交
3926 3927
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
L
Lucas De Marchi 已提交
3928
		 * be transferred for this command.  Provided a sense condition
已提交
3929 3930 3931 3932 3933
		 * 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) &&
3934 3935
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
3936
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3937
					 "9027 FCP command x%x residual "
3938 3939
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
3940
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
3941
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
3942 3943 3944
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
3945
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3946
				 "9028 FCP command x%x residual overrun error. "
3947
				 "Data: x%x x%x\n", cmnd->cmnd[0],
3948
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
3949 3950 3951 3952
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
3953
	 * (fcpi_parm should be zero).
已提交
3954
	 */
3955
	} else if (fcpi_parm) {
3956
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3957
				 "9029 FCP Data Transfer Check Error: "
J
James Smart 已提交
3958
				 "x%x x%x x%x x%x x%x\n",
3959 3960
				 be32_to_cpu(fcpcmd->fcpDl),
				 be32_to_cpu(fcprsp->rspResId),
J
James Smart 已提交
3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972
				 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;
		}
3973
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
3974 3975 3976 3977
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
3978
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
3979 3980
}

3981
/**
3982
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3983 3984
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
3985
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
3986 3987 3988 3989 3990
 *
 * 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
3991 3992 3993 3994 3995 3996
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
3997
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
3998 3999
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
4000
	struct scsi_cmnd *cmd;
4001
	int result;
4002
	struct scsi_device *tmp_sdev;
4003
	int depth;
4004
	unsigned long flags;
4005
	struct lpfc_fast_path_event *fast_path_evt;
4006
	struct Scsi_Host *shost;
4007
	uint32_t queue_depth, scsi_id;
4008
	uint32_t logit = LOG_FCP;
已提交
4009

4010 4011 4012 4013 4014 4015
	/* Sanity check on return of outstanding command */
	if (!(lpfc_cmd->pCmd))
		return;
	cmd = lpfc_cmd->pCmd;
	shost = cmd->device->host;

4016
	lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
已提交
4017
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
4018 4019 4020
	/* pick up SLI4 exhange busy status from HBA */
	lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;

4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (lpfc_cmd->prot_data_type) {
		struct scsi_dif_tuple *src = NULL;

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

		lpfc_cmd->prot_data = 0;
		lpfc_cmd->prot_data_type = 0;
		lpfc_cmd->prot_data_segment = NULL;
	}
#endif
4052 4053
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
4054 4055 4056 4057 4058 4059 4060

	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;
4061 4062 4063 4064
		if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
		    !lpfc_cmd->fcp_rsp->rspStatus3 &&
		    (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
		    !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4065 4066 4067 4068 4069
			logit = 0;
		else
			logit = LOG_FCP | LOG_FCP_UNDER;
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
			 "9030 FCP cmd x%x failed <%d/%d> "
4070 4071 4072
			 "status: x%x result: x%x "
			 "sid: x%x did: x%x oxid: x%x "
			 "Data: x%x x%x\n",
4073 4074 4075 4076
			 cmd->cmnd[0],
			 cmd->device ? cmd->device->id : 0xffff,
			 cmd->device ? cmd->device->lun : 0xffff,
			 lpfc_cmd->status, lpfc_cmd->result,
4077 4078
			 vport->fc_myDID,
			 (pnode) ? pnode->nlp_DID : 0,
4079 4080
			 phba->sli_rev == LPFC_SLI_REV4 ?
			     lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4081 4082
			 pIocbOut->iocb.ulpContext,
			 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
已提交
4083 4084 4085 4086

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
4087
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
4088 4089 4090
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
4091
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115
			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
4116
			break;
4117
		case IOSTAT_LOCAL_REJECT:
4118
		case IOSTAT_REMOTE_STOP:
4119 4120 4121 4122 4123 4124 4125 4126 4127
			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;
			}
4128
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4129
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
4130 4131
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4132
				cmd->result = ScsiResult(DID_REQUEUE, 0);
4133
				break;
4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149
			}
			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 "
4150
							"on unprotected cmd\n");
4151 4152
				}
			}
4153 4154 4155 4156 4157 4158 4159 4160
			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,
4161 4162
					lpfc_cmd->cur_iocbq.sli4_lxritag,
					0, 0);
4163
			}
4164
		/* else: fall through */
已提交
4165 4166 4167 4168 4169
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

4170
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4171
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4172 4173
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
4174
	} else
已提交
4175 4176 4177 4178 4179
		cmd->result = ScsiResult(DID_OK, 0);

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

4180 4181 4182 4183 4184 4185
		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
4186 4187
	}

4188
	lpfc_update_stats(phba, lpfc_cmd);
4189
	result = cmd->result;
4190 4191 4192
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4193
		spin_lock_irqsave(shost->host_lock, flags);
4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205
		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;
		}
4206
		spin_unlock_irqrestore(shost->host_lock, flags);
4207
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4208
		if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4209
		   time_after(jiffies, pnode->last_change_time +
4210
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4211
			spin_lock_irqsave(shost->host_lock, flags);
4212 4213 4214 4215 4216 4217
			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;
4218
			pnode->last_change_time = jiffies;
4219
			spin_unlock_irqrestore(shost->host_lock, flags);
4220
		}
4221 4222
	}

4223
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4224 4225 4226 4227

	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	queue_depth = cmd->device->queue_depth;
	scsi_id = cmd->device->id;
4228 4229
	cmd->scsi_done(cmd);

4230
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4231
		spin_lock_irqsave(&phba->hbalock, flags);
4232
		lpfc_cmd->pCmd = NULL;
4233
		spin_unlock_irqrestore(&phba->hbalock, flags);
4234

4235 4236 4237 4238
		/*
		 * If there is a thread waiting for command completion
		 * wake up the thread.
		 */
4239
		spin_lock_irqsave(shost->host_lock, flags);
4240 4241
		if (lpfc_cmd->waitq)
			wake_up(lpfc_cmd->waitq);
4242
		spin_unlock_irqrestore(shost->host_lock, flags);
4243 4244 4245 4246
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

4247
	if (!result)
4248
		lpfc_rampup_queue_depth(vport, queue_depth);
4249

4250 4251 4252 4253
	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
4254 4255
	if (result == SAM_STAT_TASK_SET_FULL && pnode &&
	    NLP_CHK_NODE_ACT(pnode)) {
4256 4257
		shost_for_each_device(tmp_sdev, shost) {
			if (tmp_sdev->id != scsi_id)
4258 4259
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
4260 4261 4262
						      tmp_sdev->queue_depth-1);
			if (depth <= 0)
				continue;
4263 4264 4265
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
					 "0711 detected queue full - lun queue "
					 "depth adjusted to %d.\n", depth);
4266
			lpfc_send_sdev_queuedepth_change_event(phba, vport,
4267 4268 4269
							       pnode,
							       tmp_sdev->lun,
							       depth+1, depth);
4270 4271 4272
		}
	}

4273
	spin_lock_irqsave(&phba->hbalock, flags);
4274
	lpfc_cmd->pCmd = NULL;
4275
	spin_unlock_irqrestore(&phba->hbalock, flags);
4276

4277 4278 4279 4280
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
4281
	spin_lock_irqsave(shost->host_lock, flags);
4282 4283
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
4284
	spin_unlock_irqrestore(shost->host_lock, flags);
4285

4286
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4287 4288
}

4289
/**
4290
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306
 * @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]);
	}
}

4307
/**
4308
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4309 4310 4311 4312 4313
 * @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
4314
 * to transfer for device with SLI3 interface spec.
4315
 **/
已提交
4316
static void
4317
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
4318
		    struct lpfc_nodelist *pnode)
已提交
4319
{
J
James Smart 已提交
4320
	struct lpfc_hba *phba = vport->phba;
已提交
4321 4322 4323 4324 4325
	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;
4326
	char tag[2];
4327 4328
	uint8_t *ptr;
	bool sli4;
已提交
4329

4330 4331 4332
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
4333
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4334 4335
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
4336

4337 4338
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
4339

4340 4341 4342 4343 4344 4345 4346
	ptr = &fcp_cmnd->fcpCdb[0];
	memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
	if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
		ptr += scsi_cmnd->cmd_len;
		memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
	}

4347 4348
	if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
		switch (tag[0]) {
已提交
4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359
		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
4360
		fcp_cmnd->fcpCntl1 = SIMPLE_Q;
已提交
4361

4362 4363
	sli4 = (phba->sli_rev == LPFC_SLI_REV4);

已提交
4364 4365 4366 4367 4368 4369
	/*
	 * 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.
	 */
4370
	if (scsi_sg_count(scsi_cmnd)) {
已提交
4371 4372
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4373 4374 4375
			if (sli4)
				iocb_cmd->ulpPU = PARM_READ_CHECK;
			else {
4376 4377
				iocb_cmd->un.fcpi.fcpi_parm = 0;
				iocb_cmd->ulpPU = 0;
4378
			}
已提交
4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393
			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++;
	}
4394 4395
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4396
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
4397 4398 4399 4400 4401
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
4402
	if (sli4)
4403 4404
		piocbq->iocb.ulpContext =
		  phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
已提交
4405 4406
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
4407 4408
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
4409 4410 4411 4412 4413

	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
4414
	piocbq->vport = vport;
已提交
4415 4416
}

4417
/**
4418
 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4419 4420 4421 4422 4423
 * @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.
 *
4424 4425
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
4426 4427 4428 4429 4430
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
4431
static int
4432
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
4433
			     struct lpfc_scsi_buf *lpfc_cmd,
4434
			     unsigned int lun,
已提交
4435 4436 4437 4438 4439
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
4440
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
4441 4442
	struct lpfc_nodelist *ndlp = rdata->pnode;

4443 4444
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
4445 4446 4447
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
4448 4449
	piocbq->vport = vport;

已提交
4450 4451 4452
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
4453 4454 4455
	/* 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
4456
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4457 4458
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4459
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
4460 4461
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
4462 4463 4464 4465
	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
		piocb->ulpContext =
		  vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
	}
已提交
4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477
	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;
4478
	} else
已提交
4479
		piocb->ulpTimeout = lpfc_cmd->timeout;
4480

4481 4482
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4483

4484
	return 1;
4485 4486 4487
}

/**
L
Lucas De Marchi 已提交
4488
 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499
 * @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)
{

4500 4501 4502
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;

4503 4504 4505 4506
	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;
4507
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4508
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4509
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4510
		break;
4511 4512 4513
	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;
4514
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4515
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4516
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4517
		break;
4518 4519 4520 4521 4522 4523 4524 4525
	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;
4526
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4527 4528 4529
	return 0;
}

4530
/**
4531
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4532 4533 4534 4535 4536 4537 4538
 * @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.
 **/
4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550
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;
}

4551
/**
4552
 * lpfc_info - Info entry point of scsi_host_template data structure
4553 4554 4555 4556 4557 4558 4559
 * @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
4560 4561 4562
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
4563 4564
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4565
	int len, link_speed = 0;
已提交
4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584
	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);
		}
4585
		len = strlen(lpfcinfobuf);
4586 4587 4588 4589 4590 4591 4592 4593
		if (phba->sli_rev <= LPFC_SLI_REV3) {
			link_speed = lpfc_sli_port_speed_get(phba);
		} else {
			if (phba->sli4_hba.link_state.logical_speed)
				link_speed =
				      phba->sli4_hba.link_state.logical_speed;
			else
				link_speed = phba->sli4_hba.link_state.speed;
4594
		}
4595 4596 4597
		if (link_speed != 0)
			snprintf(lpfcinfobuf + len, 384-len,
				 " Logical Link Speed: %d Mbps", link_speed);
已提交
4598 4599 4600 4601
	}
	return lpfcinfobuf;
}

4602
/**
4603
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4604 4605 4606 4607 4608
 * @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.
 **/
4609 4610 4611 4612 4613
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

4614
	if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4615 4616 4617 4618
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

4619
/**
4620
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4621 4622 4623 4624
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
4625 4626 4627 4628 4629
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

4630
/**
4631
 * lpfc_poll_timeout - Restart polling timer
4632 4633 4634 4635 4636 4637
 * @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.
 **/

4638 4639
void lpfc_poll_timeout(unsigned long ptr)
{
J
James Smart 已提交
4640
	struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4641 4642

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4643 4644 4645
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

4646 4647 4648 4649 4650
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

4651
/**
4652
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663
 * @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
4664
static int
4665
lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
已提交
4666
{
J
James Smart 已提交
4667 4668
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
4669
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
4670
	struct lpfc_nodelist *ndlp;
4671
	struct lpfc_scsi_buf *lpfc_cmd;
4672 4673
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
4674

4675 4676 4677
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
4678 4679
		goto out_fail_command;
	}
4680
	ndlp = rdata->pnode;
已提交
4681

4682
	if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4683
		(!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4684

4685 4686 4687 4688
		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",
4689 4690 4691 4692 4693
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
4694
	/*
4695 4696
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
4697
	 */
4698 4699
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
		goto out_tgt_busy;
4700
	if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4701
		goto out_tgt_busy;
4702

4703
	lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
已提交
4704
	if (lpfc_cmd == NULL) {
4705
		lpfc_rampdown_queue_depth(phba);
4706

4707 4708 4709
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
4710 4711 4712 4713 4714 4715 4716 4717 4718 4719
		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;
4720
	lpfc_cmd->start_time = jiffies;
已提交
4721 4722
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;

4723
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4724
		if (vport->phba->cfg_enable_bg) {
4725 4726
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4727 4728 4729 4730 4731 4732 4733
					 "9033 BLKGRD: rcvd %s cmd:x%x "
					 "sector x%llx cnt %u pt %x\n",
					 dif_op_str[scsi_get_prot_op(cmnd)],
					 cmnd->cmnd[0],
					 (unsigned long long)scsi_get_lba(cmnd),
					 blk_rq_sectors(cmnd->request),
					 (cmnd->cmnd[1]>>5));
4734
		}
4735 4736
		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
4737
		if (vport->phba->cfg_enable_bg) {
4738 4739
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
4740 4741 4742 4743
					 "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
					 "x%x sector x%llx cnt %u pt %x\n",
					 cmnd->cmnd[0],
					 (unsigned long long)scsi_get_lba(cmnd),
4744
					 blk_rq_sectors(cmnd->request),
4745
					 (cmnd->cmnd[1]>>5));
4746
		}
4747 4748 4749
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
4750 4751 4752
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
4753
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
4754

4755
	atomic_inc(&ndlp->cmd_pending);
4756
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4757
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4758 4759
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
已提交
4760
		goto out_host_busy_free_buf;
4761
	}
4762
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4763 4764 4765
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

4766 4767 4768 4769
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
4770 4771 4772
	return 0;

 out_host_busy_free_buf:
4773
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4774
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
4775 4776 4777
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

4778 4779 4780
 out_tgt_busy:
	return SCSI_MLQUEUE_TARGET_BUSY;

已提交
4781
 out_fail_command:
4782
	cmnd->scsi_done(cmnd);
已提交
4783 4784 4785
	return 0;
}

J
Jeff Garzik 已提交
4786

4787
/**
4788
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4789 4790 4791 4792 4793 4794 4795 4796
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
4797
static int
4798
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
4799
{
J
James Smart 已提交
4800 4801 4802
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
4803 4804
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
4805 4806
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
4807
	int ret = SUCCESS, status = 0;
4808
	unsigned long flags;
4809
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
4810

4811
	status = fc_block_scsi_eh(cmnd);
4812
	if (status != 0 && status != SUCCESS)
4813
		return status;
4814

4815
	spin_lock_irqsave(&phba->hbalock, flags);
4816 4817
	/* driver queued commands are in process of being flushed */
	if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4818
		spin_unlock_irqrestore(&phba->hbalock, flags);
4819 4820 4821 4822 4823 4824
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3168 SCSI Layer abort requested I/O has been "
			"flushed by LLD.\n");
		return FAILED;
	}

4825
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4826
	if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4827
		spin_unlock_irqrestore(&phba->hbalock, flags);
J
James Smart 已提交
4828 4829
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4830
			 "x%x ID %d LUN %d\n",
4831
			 SUCCESS, cmnd->device->id, cmnd->device->lun);
J
James Smart 已提交
4832 4833
		return SUCCESS;
	}
已提交
4834

4835 4836 4837
	iocb = &lpfc_cmd->cur_iocbq;
	/* the command is in process of being cancelled */
	if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4838
		spin_unlock_irqrestore(&phba->hbalock, flags);
4839 4840 4841 4842 4843
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3169 SCSI Layer abort requested I/O has been "
			"cancelled by LLD.\n");
		return FAILED;
	}
4844 4845 4846 4847
	/*
	 * 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
4848
	 * see the completion before the eh fired. Just return SUCCESS.
4849
	 */
4850 4851 4852 4853 4854 4855
	if (lpfc_cmd->pCmd != cmnd) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3170 SCSI Layer abort requested I/O has been "
			"completed by LLD.\n");
		goto out_unlock;
	}
已提交
4856

4857
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
4858

4859
	abtsiocb = __lpfc_sli_get_iocbq(phba);
4860 4861
	if (abtsiocb == NULL) {
		ret = FAILED;
4862
		goto out_unlock;
已提交
4863 4864 4865
	}

	/*
4866 4867 4868
	 * 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
4869 4870
	 */

4871 4872 4873 4874
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
4875 4876 4877 4878
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
4879

4880 4881
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
4882 4883 4884

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
	abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4885
	abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4886

J
James Smart 已提交
4887
	if (lpfc_is_link_up(phba))
4888 4889 4890
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
4891

4892
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
4893
	abtsiocb->vport = vport;
4894
	/* no longer need the lock after this point */
4895
	spin_unlock_irqrestore(&phba->hbalock, flags);
4896

4897 4898
	if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
	    IOCB_ERROR) {
4899 4900 4901 4902
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
4903

4904
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4905 4906
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4907

4908
	lpfc_cmd->waitq = &waitq;
4909
	/* Wait for abort to complete */
4910 4911
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
4912
			   msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4913
	lpfc_cmd->waitq = NULL;
已提交
4914

4915 4916
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
4917 4918
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
4919 4920 4921 4922
				 "for abortng I/O (xri:x%x) to complete: "
				 "ret %#x, ID %d, LUN %d\n",
				 iocb->sli4_xritag, ret,
				 cmnd->device->id, cmnd->device->lun);
已提交
4923
	}
4924
	goto out;
已提交
4925

4926
out_unlock:
4927
	spin_unlock_irqrestore(&phba->hbalock, flags);
4928
out:
4929 4930
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4931 4932
			 "LUN %d\n", ret, cmnd->device->id,
			 cmnd->device->lun);
4933
	return ret;
4934 4935
}

4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958
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";
	}
}

4959
/**
4960 4961 4962 4963 4964 4965
 * 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
4966
 *
4967 4968
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
4969
 *
4970 4971 4972
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
4973
 **/
已提交
4974
static int
4975 4976 4977
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
4978
{
J
James Smart 已提交
4979
	struct lpfc_hba   *phba = vport->phba;
4980
	struct lpfc_scsi_buf *lpfc_cmd;
4981 4982
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
4983
	struct lpfc_nodelist *pnode = rdata->pnode;
4984
	int ret;
4985
	int status;
已提交
4986

4987
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4988
		return FAILED;
4989

4990
	lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
已提交
4991
	if (lpfc_cmd == NULL)
4992
		return FAILED;
已提交
4993
	lpfc_cmd->timeout = 60;
4994
	lpfc_cmd->rdata = rdata;
已提交
4995

4996 4997
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
4998 4999 5000 5001
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
5002

5003
	iocbq = &lpfc_cmd->cur_iocbq;
5004
	iocbqrsp = lpfc_sli_get_iocbq(phba);
5005 5006 5007 5008
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
5009

5010
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5011
			 "0702 Issue %s to TGT %d LUN %d "
5012
			 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5013
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5014 5015
			 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
			 iocbq->iocb_flag);
5016

5017
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5018
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
5019 5020 5021 5022 5023
	if (status != IOCB_SUCCESS) {
		if (status == IOCB_TIMEDOUT) {
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
			ret = TIMEOUT_ERROR;
		} else
5024
			ret = FAILED;
5025 5026
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5027 5028
			 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
			 "iocb_flag x%x\n",
5029 5030
			 lpfc_taskmgmt_name(task_mgmt_cmd),
			 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
5031 5032
			 iocbqrsp->iocb.un.ulpWord[4],
			 iocbq->iocb_flag);
5033 5034 5035
	} else if (status == IOCB_BUSY)
		ret = FAILED;
	else
5036 5037
		ret = SUCCESS;

5038
	lpfc_sli_release_iocbq(phba, iocbqrsp);
5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061

	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;
5062
	struct lpfc_nodelist *pnode;
5063 5064
	unsigned long later;

5065 5066 5067 5068 5069 5070
	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;
5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117
	/*
	 * 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);
5118
	if (cnt)
5119
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
5120
				    tgt_id, lun_id, context);
5121 5122 5123
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5124
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
5125 5126
	}
	if (cnt) {
5127
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5128 5129 5130 5131 5132 5133
			"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
5134
	}
5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154
	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;
5155
	struct lpfc_nodelist *pnode;
5156 5157 5158
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
5159
	int status, ret = SUCCESS;
5160

5161 5162 5163 5164 5165 5166
	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;
5167
	status = fc_block_scsi_eh(cmnd);
5168
	if (status != 0 && status != SUCCESS)
5169
		return status;
5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199

	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.
	 */
5200
	ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5201
						LPFC_CTX_LUN);
5202
	return ret;
5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221
}

/**
 * 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;
5222
	struct lpfc_nodelist *pnode;
5223 5224 5225
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
5226
	int status, ret = SUCCESS;
5227

5228 5229 5230 5231 5232 5233
	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;
5234
	status = fc_block_scsi_eh(cmnd);
5235
	if (status != 0 && status != SUCCESS)
5236
		return status;
5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266

	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.
	 */
5267 5268 5269
	ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					  LPFC_CTX_TGT);
	return ret;
已提交
5270 5271
}

5272
/**
5273
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5274 5275
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
5276 5277
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
5278
 *
5279 5280 5281
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
5282
 **/
5283
static int
5284
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
5285
{
J
James Smart 已提交
5286 5287
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
5288
	struct lpfc_nodelist *ndlp = NULL;
5289
	struct lpfc_scsi_event_header scsi_event;
5290 5291
	int match;
	int ret = SUCCESS, status, i;
5292 5293 5294 5295 5296 5297 5298

	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));

5299 5300
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
5301

5302
	status = fc_block_scsi_eh(cmnd);
5303
	if (status != 0 && status != SUCCESS)
5304
		return status;
5305

已提交
5306 5307 5308 5309 5310
	/*
	 * 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.
	 */
5311
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
5312
		/* Search for mapped node by target ID */
已提交
5313
		match = 0;
J
James Smart 已提交
5314 5315
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5316 5317
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
5318 5319 5320
			if (vport->phba->cfg_fcp2_no_tgt_reset &&
			    (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
				continue;
5321
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5322
			    ndlp->nlp_sid == i &&
5323
			    ndlp->rport) {
已提交
5324 5325 5326 5327
				match = 1;
				break;
			}
		}
J
James Smart 已提交
5328
		spin_unlock_irq(shost->host_lock);
已提交
5329 5330
		if (!match)
			continue;
5331 5332 5333 5334 5335

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

		if (status != SUCCESS) {
5336 5337 5338
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
5339
			ret = FAILED;
已提交
5340 5341
		}
	}
5342
	/*
5343 5344 5345 5346
	 * 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.
5347
	 */
5348 5349 5350

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
5351
		ret = FAILED;
5352

5353 5354
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
5355 5356 5357
	return ret;
}

5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381
/**
 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does host reset to the adaptor port. It brings the HBA
 * offline, performs a board restart, and then brings the board back online.
 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
 * reject all outstanding SCSI commands to the host and error returned
 * back to SCSI mid-level. As this will be SCSI mid-level's last resort
 * of error handling, it will only return error if resetting of the adapter
 * is not successful; in all other cases, will return success.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba *phba = vport->phba;
	int rc, ret = SUCCESS;

5382 5383 5384
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "3172 SCSI layer issued Host Reset Data:\n");

5385
	lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5386 5387 5388 5389
	lpfc_offline(phba);
	rc = lpfc_sli_brdrestart(phba);
	if (rc)
		ret = FAILED;
5390 5391 5392
	rc = lpfc_online(phba);
	if (rc)
		ret = FAILED;
5393 5394
	lpfc_unblock_mgmt_io(phba);

5395 5396 5397 5398 5399
	if (ret == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "3323 Failed host reset, bring it offline\n");
		lpfc_sli4_offline_eratt(phba);
	}
5400 5401 5402
	return ret;
}

5403
/**
5404
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415
 * @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
5416 5417 5418
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
5419 5420
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5421
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5422
	uint32_t total = 0;
已提交
5423
	uint32_t num_to_alloc = 0;
5424
	int num_allocated = 0;
5425
	uint32_t sdev_cnt;
已提交
5426

5427
	if (!rport || fc_remote_port_chkready(rport))
已提交
5428 5429
		return -ENXIO;

5430
	sdev->hostdata = rport->dd_data;
5431
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
已提交
5432 5433 5434 5435

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
5436 5437 5438
	 * 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
5439 5440
	 */
	total = phba->total_scsi_bufs;
5441
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
5442

5443 5444 5445 5446
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

5447 5448
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5449 5450 5451
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
5452
		return 0;
5453 5454 5455
	/* 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 ) {
5456 5457 5458 5459 5460 5461
		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
5462 5463
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
5464 5465
	num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
	if (num_to_alloc != num_allocated) {
5466 5467 5468 5469 5470
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0708 Allocation request of %d "
					 "command buffers did not succeed.  "
					 "Allocated %d buffers.\n",
					 num_to_alloc, num_allocated);
已提交
5471
	}
5472 5473
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
已提交
5474 5475 5476
	return 0;
}

5477
/**
5478
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
5479 5480 5481 5482 5483 5484 5485 5486 5487
 * @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
5488 5489 5490
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
5491 5492
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
5493 5494

	if (sdev->tagged_supported)
5495
		scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
5496
	else
5497
		scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
5498

5499
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5500 5501
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5502 5503 5504 5505
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
5506 5507 5508
	return 0;
}

5509
/**
5510
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5511 5512 5513 5514
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
5515 5516 5517
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
5518 5519 5520
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	atomic_dec(&phba->sdev_cnt);
已提交
5521 5522 5523 5524
	sdev->hostdata = NULL;
	return;
}

5525

已提交
5526 5527 5528 5529 5530 5531
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,
5532 5533
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
5534
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
5535
	.eh_host_reset_handler  = lpfc_host_reset_handler,
已提交
5536 5537 5538
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
5539
	.scan_finished		= lpfc_scan_finished,
已提交
5540
	.this_id		= -1,
5541
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
5542 5543
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
J
James Smart 已提交
5544
	.shost_attrs		= lpfc_hba_attrs,
5545
	.max_sectors		= 0xFFFF,
5546
	.vendor_id		= LPFC_NL_VENDOR_ID,
5547
	.change_queue_depth	= lpfc_change_queue_depth,
5548
	.change_queue_type	= lpfc_change_queue_type,
已提交
5549
};
5550 5551 5552 5553 5554 5555 5556

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,
5557 5558
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
5559 5560 5561 5562 5563 5564
	.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,
5565
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
5566 5567 5568 5569
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
5570
	.change_queue_depth	= lpfc_change_queue_depth,
5571
	.change_queue_type	= lpfc_change_queue_type,
5572
};