lpfc_scsi.c 195 KB
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/*******************************************************************
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 * This file is part of the Emulex Linux Device Driver for         *
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 * Fibre Channel Host Bus Adapters.                                *
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 * Copyright (C) 2017-2020 Broadcom. All Rights Reserved. The term *
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 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
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 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
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 * EMULEX and SLI are trademarks of Emulex.                        *
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 * www.broadcom.com                                                *
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 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
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 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
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 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
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 *******************************************************************/
#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/export.h>
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#include <linux/delay.h>
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#include <asm/unaligned.h>
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#include <linux/t10-pi.h>
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#include <linux/crc-t10dif.h>
#include <net/checksum.h>
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#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

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

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

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

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static struct lpfc_rport_data *
lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
{
	struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;

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	if (vport->phba->cfg_fof)
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		return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
	else
		return (struct lpfc_rport_data *)sdev->hostdata;
}

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static void
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lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
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static void
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lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
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static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
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static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
	return sc->device->sector_size;
}

#define LPFC_CHECK_PROTECT_GUARD	1
#define LPFC_CHECK_PROTECT_REF		2
static inline unsigned
lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
{
	return 1;
}

static inline unsigned
lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
{
	if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
		return 0;
	if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
		return 1;
	return 0;
}

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/**
 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 * @phba: Pointer to HBA object.
 * @lpfc_cmd: lpfc scsi command object pointer.
 *
 * This function is called from the lpfc_prep_task_mgmt_cmd function to
 * set the last bit in the response sge entry.
 **/
static void
lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
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				struct lpfc_io_buf *lpfc_cmd)
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{
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	struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
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	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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 * @vport: The virtual port on which this call is executing.
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 * @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
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lpfc_update_stats(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
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{
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	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_rport_data *rdata;
	struct lpfc_nodelist *pnode;
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	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	unsigned long flags;
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	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
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	unsigned long latency;
	int i;

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	if (!vport->stat_data_enabled ||
	    vport->stat_data_blocked ||
	    (cmd->result))
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		return;

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	latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
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	rdata = lpfc_cmd->rdata;
	pnode = rdata->pnode;
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	spin_lock_irqsave(shost->host_lock, flags);
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	if (!pnode ||
	    !pnode->lat_data ||
	    (phba->bucket_type == LPFC_NO_BUCKET)) {
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		spin_unlock_irqrestore(shost->host_lock, flags);
		return;
	}

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

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

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

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

	phba->last_ramp_down_time = jiffies;

	spin_unlock_irqrestore(&phba->hbalock, flags);

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

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

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

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

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

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

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

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/**
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 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
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 * @vport: The virtual port for which this call being executed.
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 * @num_to_alloc: 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_io_buf *psb;
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	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;
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	dma_addr_t pdma_phys_sgl;
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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++) {
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		psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL);
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		if (!psb)
			break;
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		/*
		 * Get memory from the pci pool to map the virt space to pci
		 * bus space for an I/O.  The DMA buffer includes space for the
		 * struct fcp_cmnd, struct fcp_rsp and the number of bde's
		 * necessary to support the sg_tablesize.
		 */
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		psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
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					GFP_KERNEL, &psb->dma_handle);
		if (!psb->data) {
			kfree(psb);
			break;
		}


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

		psb->fcp_cmnd = psb->data;
		psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
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		psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) +
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			sizeof(struct fcp_rsp);
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		/* Initialize local short-hand pointers. */
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		bpl = (struct ulp_bde64 *)psb->dma_sgl;
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		pdma_phys_fcp_cmd = psb->dma_handle;
		pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
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		pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) +
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			sizeof(struct fcp_rsp);

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

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

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		if ((phba->sli_rev == 3) &&
				!(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
			/* fill in immediate fcp command BDE */
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
			iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
			iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
					unsli3.fcp_ext.icd);
			iocb->un.fcpi64.bdl.addrHigh = 0;
			iocb->ulpBdeCount = 0;
			iocb->ulpLe = 0;
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			/* fill in response BDE */
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			iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
							BUFF_TYPE_BDE_64;
			iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
				sizeof(struct fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrLow =
				putPaddrLow(pdma_phys_fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrHigh =
				putPaddrHigh(pdma_phys_fcp_rsp);
		} else {
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
			iocb->un.fcpi64.bdl.bdeSize =
					(2 * sizeof(struct ulp_bde64));
			iocb->un.fcpi64.bdl.addrLow =
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					putPaddrLow(pdma_phys_sgl);
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			iocb->un.fcpi64.bdl.addrHigh =
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					putPaddrHigh(pdma_phys_sgl);
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			iocb->ulpBdeCount = 1;
			iocb->ulpLe = 1;
		}
		iocb->ulpClass = CLASS3;
		psb->status = IOSTAT_SUCCESS;
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		/* Put it back into the SCSI buffer list */
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		psb->cur_iocbq.context1  = psb;
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		spin_lock_init(&psb->buf_lock);
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		lpfc_release_scsi_buf_s3(phba, psb);
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	}
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	return bcnt;
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}

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/**
 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 * @vport: pointer to lpfc vport data structure.
 *
 * This routine is invoked by the vport cleanup for deletions and the cleanup
 * for an ndlp on removal.
 **/
void
lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
{
	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_io_buf *psb, *next_psb;
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	struct lpfc_sli4_hdw_queue *qp;
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	unsigned long iflag = 0;
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	int idx;
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	if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
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		return;
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	spin_lock_irqsave(&phba->hbalock, iflag);
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	for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
		qp = &phba->sli4_hba.hdwq[idx];

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		spin_lock(&qp->abts_io_buf_list_lock);
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		list_for_each_entry_safe(psb, next_psb,
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					 &qp->lpfc_abts_io_buf_list, list) {
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			if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME)
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				continue;

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			if (psb->rdata && psb->rdata->pnode &&
			    psb->rdata->pnode->vport == vport)
				psb->rdata = NULL;
		}
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		spin_unlock(&qp->abts_io_buf_list_lock);
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	}
	spin_unlock_irqrestore(&phba->hbalock, iflag);
}

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/**
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 * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort
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 * @phba: pointer to lpfc hba data structure.
 * @axri: pointer to the fcp xri abort wcqe structure.
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 * @idx: index into hdwq
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 *
 * This routine is invoked by the worker thread to process a SLI4 fast-path
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 * FCP or NVME aborted xri.
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 **/
void
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lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba,
			 struct sli4_wcqe_xri_aborted *axri, int idx)
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{
	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
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	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
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	struct lpfc_io_buf *psb, *next_psb;
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	struct lpfc_sli4_hdw_queue *qp;
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	unsigned long iflag = 0;
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	struct lpfc_iocbq *iocbq;
	int i;
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	struct lpfc_nodelist *ndlp;
	int rrq_empty = 0;
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	struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
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	if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
		return;
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	qp = &phba->sli4_hba.hdwq[idx];
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	spin_lock_irqsave(&phba->hbalock, iflag);
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	spin_lock(&qp->abts_io_buf_list_lock);
526
	list_for_each_entry_safe(psb, next_psb,
527
		&qp->lpfc_abts_io_buf_list, list) {
528
		if (psb->cur_iocbq.sli4_xritag == xri) {
529
			list_del_init(&psb->list);
530
			psb->flags &= ~LPFC_SBUF_XBUSY;
531
			psb->status = IOSTAT_SUCCESS;
532
			if (psb->cur_iocbq.iocb_flag & LPFC_IO_NVME) {
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				qp->abts_nvme_io_bufs--;
				spin_unlock(&qp->abts_io_buf_list_lock);
				spin_unlock_irqrestore(&phba->hbalock, iflag);
				lpfc_sli4_nvme_xri_aborted(phba, axri, psb);
				return;
			}
			qp->abts_scsi_io_bufs--;
			spin_unlock(&qp->abts_io_buf_list_lock);

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			if (psb->rdata && psb->rdata->pnode)
				ndlp = psb->rdata->pnode;
			else
				ndlp = NULL;

547
			rrq_empty = list_empty(&phba->active_rrq_list);
548
			spin_unlock_irqrestore(&phba->hbalock, iflag);
549
			if (ndlp) {
550 551
				lpfc_set_rrq_active(phba, ndlp,
					psb->cur_iocbq.sli4_lxritag, rxid, 1);
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				lpfc_sli4_abts_err_handler(phba, ndlp, axri);
			}
554
			lpfc_release_scsi_buf_s4(phba, psb);
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			if (rrq_empty)
				lpfc_worker_wake_up(phba);
557 558 559
			return;
		}
	}
560
	spin_unlock(&qp->abts_io_buf_list_lock);
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	for (i = 1; i <= phba->sli.last_iotag; i++) {
		iocbq = phba->sli.iocbq_lookup[i];

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		if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
		    (iocbq->iocb_flag & LPFC_IO_LIBDFC))
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			continue;
		if (iocbq->sli4_xritag != xri)
			continue;
569
		psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq);
570
		psb->flags &= ~LPFC_SBUF_XBUSY;
571
		spin_unlock_irqrestore(&phba->hbalock, iflag);
572
		if (!list_empty(&pring->txq))
573
			lpfc_worker_wake_up(phba);
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		return;

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

580
/**
581
 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
582
 * @phba: The HBA for which this call is being executed.
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 * @ndlp: pointer to a node-list data structure.
 * @cmnd: Pointer to scsi_cmnd data structure.
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 *
 * 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
 **/
593
static struct lpfc_io_buf *
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lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
		     struct scsi_cmnd *cmnd)
596
{
597
	struct lpfc_io_buf *lpfc_cmd = NULL;
598
	struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
599
	unsigned long iflag = 0;
600

601
	spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
602
	list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf,
603 604
			 list);
	if (!lpfc_cmd) {
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		spin_lock(&phba->scsi_buf_list_put_lock);
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		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,
610
				 struct lpfc_io_buf, list);
611
		spin_unlock(&phba->scsi_buf_list_put_lock);
612
	}
613
	spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
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	if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
		atomic_inc(&ndlp->cmd_pending);
		lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
	}
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	return  lpfc_cmd;
}
621
/**
622
 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA
623
 * @phba: The HBA for which this call is being executed.
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 * @ndlp: pointer to a node-list data structure.
 * @cmnd: Pointer to scsi_cmnd data structure.
626
 *
627
 * This routine removes a scsi buffer from head of @hdwq io_buf_list
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 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
634
static struct lpfc_io_buf *
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lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
		     struct scsi_cmnd *cmnd)
637
{
638
	struct lpfc_io_buf *lpfc_cmd;
639
	struct lpfc_sli4_hdw_queue *qp;
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	struct sli4_sge *sgl;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_fcp_cmd;
643
	uint32_t cpu, idx;
644
	int tag;
645
	struct fcp_cmd_rsp_buf *tmp = NULL;
646

647
	cpu = raw_smp_processor_id();
648
	if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
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		tag = blk_mq_unique_tag(cmnd->request);
		idx = blk_mq_unique_tag_to_hwq(tag);
	} else {
652
		idx = phba->sli4_hba.cpu_map[cpu].hdwq;
653
	}
654

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	lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx,
				   !phba->cfg_xri_rebalancing);
	if (!lpfc_cmd) {
		qp = &phba->sli4_hba.hdwq[idx];
659
		qp->empty_io_bufs++;
660
		return NULL;
661
	}
662

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	/* Setup key fields in buffer that may have been changed
	 * if other protocols used this buffer.
	 */
	lpfc_cmd->cur_iocbq.iocb_flag = LPFC_IO_FCP;
	lpfc_cmd->prot_seg_cnt = 0;
	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->timeout = 0;
	lpfc_cmd->flags = 0;
	lpfc_cmd->start_time = jiffies;
	lpfc_cmd->waitq = NULL;
673
	lpfc_cmd->cpu = cpu;
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#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	lpfc_cmd->prot_data_type = 0;
#endif
677
	tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
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	if (!tmp) {
		lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq);
680
		return NULL;
681
	}
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	lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
	lpfc_cmd->fcp_rsp = tmp->fcp_rsp;
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	/*
	 * The first two SGEs are the FCP_CMD and FCP_RSP.
	 * The balance are sg list bdes. Initialize the
	 * first two and leave the rest for queuecommand.
	 */
	sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
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	pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle;
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	sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
	sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
	sgl->word2 = le32_to_cpu(sgl->word2);
	bf_set(lpfc_sli4_sge_last, sgl, 0);
	sgl->word2 = cpu_to_le32(sgl->word2);
	sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
	sgl++;

	/* Setup the physical region for the FCP RSP */
	pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
	sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
	sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
	sgl->word2 = le32_to_cpu(sgl->word2);
	bf_set(lpfc_sli4_sge_last, sgl, 1);
	sgl->word2 = cpu_to_le32(sgl->word2);
	sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));

710
	if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
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		atomic_inc(&ndlp->cmd_pending);
		lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
	}
714
	return  lpfc_cmd;
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}
/**
 * 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.
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 * @ndlp: pointer to a node-list data structure.
 * @cmnd: Pointer to scsi_cmnd data structure.
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 *
 * 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
 **/
729
static struct lpfc_io_buf*
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lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
		  struct scsi_cmnd *cmnd)
732
{
733
	return  phba->lpfc_get_scsi_buf(phba, ndlp, cmnd);
734
}
735

736
/**
737
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
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 * @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.
 **/
744
static void
745
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
746
{
747
	unsigned long iflag = 0;
748

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	psb->seg_cnt = 0;
	psb->prot_seg_cnt = 0;

	spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
753
	psb->pCmd = NULL;
754
	psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
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	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
	spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
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}

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/**
 * 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.
 *
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 * This routine releases @psb scsi buffer by adding it to tail of @hdwq
 * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer
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 * and cannot be reused for at least RA_TOV amount of time if it was
 * aborted.
 **/
static void
770
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
771
{
772
	struct lpfc_sli4_hdw_queue *qp;
773 774
	unsigned long iflag = 0;

775 776 777
	psb->seg_cnt = 0;
	psb->prot_seg_cnt = 0;

778
	qp = psb->hdwq;
779
	if (psb->flags & LPFC_SBUF_XBUSY) {
780
		spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
781
		psb->pCmd = NULL;
782
		list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list);
783
		qp->abts_scsi_io_bufs++;
784
		spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
785
	} else {
786
		lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp);
787 788 789
	}
}

790
/**
791 792 793 794 795 796 797 798
 * 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
799
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
800
{
801 802
	if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
		atomic_dec(&psb->ndlp->cmd_pending);
803

804
	psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
805 806 807
	phba->lpfc_release_scsi_buf(phba, psb);
}

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
/**
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
 * @data: A pointer to the immediate command data portion of the IOCB.
 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
 *
 * The routine copies the entire FCP command from @fcp_cmnd to @data while
 * byte swapping the data to big endian format for transmission on the wire.
 **/
static void
lpfc_fcpcmd_to_iocb(u8 *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]);
	}
}

827 828
/**
 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
829 830 831 832
 * @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
833
 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
834
 * through sg elements and format the bde. This routine also initializes all
835
 * IOCB fields which are dependent on scsi command request buffer.
836 837 838 839 840
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
841
static int
842
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
843 844 845 846
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct scatterlist *sgel = NULL;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
847
	struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
848
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
849
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
850
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
851
	dma_addr_t physaddr;
852
	uint32_t num_bde = 0;
853
	int nseg, datadir = scsi_cmnd->sc_data_direction;
854 855 856 857 858 859 860 861

	/*
	 * 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;
862
	if (scsi_sg_count(scsi_cmnd)) {
863 864 865 866 867 868 869
		/*
		 * 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.
		 */

870 871 872 873 874
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

875
		lpfc_cmd->seg_cnt = nseg;
876
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
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			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
					"9064 BLKGRD: %s: Too many sg segments"
					" from dma_map_sg.  Config %d, seg_cnt"
					" %d\n", __func__, phba->cfg_sg_seg_cnt,
					lpfc_cmd->seg_cnt);
882
			WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
883
			lpfc_cmd->seg_cnt = 0;
884
			scsi_dma_unmap(scsi_cmnd);
885
			return 2;
886 887 888 889 890 891 892
		}

		/*
		 * 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.
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		 * 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.
896
		 */
897
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
898
			physaddr = sg_dma_address(sgel);
899
			if (phba->sli_rev == 3 &&
900
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
901
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917
			    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++;
			}
918
		}
919
	}
920 921 922

	/*
	 * Finish initializing those IOCB fields that are dependent on the
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	 * 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.
926
	 */
927
	if (phba->sli_rev == 3 &&
928 929
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
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		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);
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945
			/* ebde count includes the response bde and data bpl */
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			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
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Lucas De Marchi committed
948
			/* ebde count includes the response bde and data bdes */
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			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
954
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
955
	}
956
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
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	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
962
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
963
	lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
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	return 0;
}

967
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
968

969
/* Return BG_ERR_INIT if error injection is detected by Initiator */
970
#define BG_ERR_INIT	0x1
971
/* Return BG_ERR_TGT if error injection is detected by Target */
972
#define BG_ERR_TGT	0x2
973
/* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
974
#define BG_ERR_SWAP	0x10
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/**
 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
 * error injection
 **/
979
#define BG_ERR_CHECK	0x20
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/**
 * lpfc_bg_err_inject - Determine if we should inject an error
 * @phba: The Hba for which this call is being executed.
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 * @sc: The SCSI command to examine
 * @reftag: (out) BlockGuard reference tag for transmitted data
 * @apptag: (out) BlockGuard application tag for transmitted data
987
 * @new_guard: (in) Value to replace CRC with if needed
988
 *
989
 * Returns BG_ERR_* bit mask or 0 if request ignored
990
 **/
991 992 993 994 995
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 */
996
	struct lpfc_io_buf *lpfc_cmd = NULL;
997
	struct scsi_dif_tuple *src = NULL;
998 999
	struct lpfc_nodelist *ndlp;
	struct lpfc_rport_data *rdata;
1000 1001 1002 1003 1004
	uint32_t op = scsi_get_prot_op(sc);
	uint32_t blksize;
	uint32_t numblks;
	sector_t lba;
	int rc = 0;
1005
	int blockoff = 0;
1006 1007 1008 1009

	if (op == SCSI_PROT_NORMAL)
		return 0;

1010
	sgpe = scsi_prot_sglist(sc);
1011
	lba = scsi_get_lba(sc);
1012 1013

	/* First check if we need to match the LBA */
1014 1015 1016 1017 1018 1019 1020 1021
	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;
1022 1023 1024 1025 1026 1027 1028
		if (sgpe) {
			blockoff = phba->lpfc_injerr_lba - lba;
			numblks = sg_dma_len(sgpe) /
				sizeof(struct scsi_dif_tuple);
			if (numblks < blockoff)
				blockoff = numblks;
		}
1029 1030
	}

1031
	/* Next check if we need to match the remote NPortID or WWPN */
1032
	rdata = lpfc_rport_data_from_scsi_device(sc->device);
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
	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;
1055
		lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble;
1056 1057
	}

1058 1059
	/* Should we change the Reference Tag */
	if (reftag) {
1060 1061 1062
		if (phba->lpfc_injerr_wref_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1063 1064 1065 1066 1067 1068 1069 1070
				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.
					 */
1071

1072 1073
					lpfc_printf_log(phba, KERN_ERR,
							LOG_TRACE_EVENT,
1074 1075 1076
					"9076 BLKGRD: Injecting reftag error: "
					"write lba x%lx + x%x oldrefTag x%x\n",
					(unsigned long)lba, blockoff,
1077
					be32_to_cpu(src->ref_tag));
1078

1079
					/*
1080 1081
					 * Save the old ref_tag so we can
					 * restore it on completion.
1082
					 */
1083 1084 1085 1086 1087 1088 1089 1090 1091
					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);
1092
					phba->lpfc_injerr_wref_cnt--;
1093 1094 1095 1096 1097 1098 1099
					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));
					}
1100 1101
					rc = BG_ERR_TGT | BG_ERR_CHECK;

1102 1103
					break;
				}
1104
				fallthrough;
1105
			case SCSI_PROT_WRITE_INSERT:
1106
				/*
1107 1108 1109
				 * For WRITE_INSERT, force the error
				 * to be sent on the wire. It should be
				 * detected by the Target.
1110
				 */
1111
				/* DEADBEEF will be the reftag on the wire */
1112 1113
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1114 1115 1116 1117 1118 1119 1120
				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));
				}
1121
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1122

1123
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1124
					"9078 BLKGRD: Injecting reftag error: "
1125 1126
					"write lba x%lx\n", (unsigned long)lba);
				break;
1127
			case SCSI_PROT_WRITE_STRIP:
1128
				/*
1129 1130 1131
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1132
				 */
1133 1134
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_wref_cnt--;
1135 1136 1137 1138 1139 1140 1141
				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));
				}
1142
				rc = BG_ERR_INIT;
1143

1144
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1145
					"9077 BLKGRD: Injecting reftag error: "
1146
					"write lba x%lx\n", (unsigned long)lba);
1147
				break;
1148
			}
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
		}
		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.
				 */
1160 1161
				*reftag = 0xDEADBEEF;
				phba->lpfc_injerr_rref_cnt--;
1162 1163 1164 1165 1166 1167 1168
				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));
				}
1169
				rc = BG_ERR_INIT;
1170

1171
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1172
					"9079 BLKGRD: Injecting reftag error: "
1173
					"read lba x%lx\n", (unsigned long)lba);
1174
				break;
1175 1176 1177 1178 1179 1180
			}
		}
	}

	/* Should we change the Application Tag */
	if (apptag) {
1181 1182 1183
		if (phba->lpfc_injerr_wapp_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1184
				if (src) {
1185 1186 1187 1188 1189 1190 1191 1192
					/*
					 * 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.
					 */

1193 1194
					lpfc_printf_log(phba, KERN_ERR,
							LOG_TRACE_EVENT,
1195 1196 1197
					"9080 BLKGRD: Injecting apptag error: "
					"write lba x%lx + x%x oldappTag x%x\n",
					(unsigned long)lba, blockoff,
1198
					be16_to_cpu(src->app_tag));
1199 1200

					/*
1201 1202
					 * Save the old app_tag so we can
					 * restore it on completion.
1203
					 */
1204 1205 1206 1207 1208 1209 1210 1211 1212
					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);
1213
					phba->lpfc_injerr_wapp_cnt--;
1214 1215 1216 1217 1218 1219 1220
					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));
					}
1221
					rc = BG_ERR_TGT | BG_ERR_CHECK;
1222 1223
					break;
				}
1224
				fallthrough;
1225
			case SCSI_PROT_WRITE_INSERT:
1226
				/*
1227 1228 1229
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1230
				 */
1231
				/* DEAD will be the apptag on the wire */
1232 1233
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1234 1235 1236 1237 1238 1239 1240
				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));
				}
1241
				rc = BG_ERR_TGT | BG_ERR_CHECK;
1242

1243
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1244
					"0813 BLKGRD: Injecting apptag error: "
1245 1246
					"write lba x%lx\n", (unsigned long)lba);
				break;
1247
			case SCSI_PROT_WRITE_STRIP:
1248
				/*
1249 1250 1251
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1252
				 */
1253 1254
				*apptag = 0xDEAD;
				phba->lpfc_injerr_wapp_cnt--;
1255 1256 1257 1258 1259 1260 1261
				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));
				}
1262
				rc = BG_ERR_INIT;
1263

1264
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1265
					"0812 BLKGRD: Injecting apptag error: "
1266
					"write lba x%lx\n", (unsigned long)lba);
1267
				break;
1268
			}
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
		}
		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.
				 */
1280 1281
				*apptag = 0xDEAD;
				phba->lpfc_injerr_rapp_cnt--;
1282 1283 1284 1285 1286 1287 1288
				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));
				}
1289
				rc = BG_ERR_INIT;
1290

1291
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1292
					"0814 BLKGRD: Injecting apptag error: "
1293
					"read lba x%lx\n", (unsigned long)lba);
1294
				break;
1295 1296 1297 1298
			}
		}
	}

1299

1300
	/* Should we change the Guard Tag */
1301 1302 1303 1304
	if (new_guard) {
		if (phba->lpfc_injerr_wgrd_cnt) {
			switch (op) {
			case SCSI_PROT_WRITE_PASS:
1305
				rc = BG_ERR_CHECK;
1306
				fallthrough;
1307 1308

			case SCSI_PROT_WRITE_INSERT:
1309
				/*
1310 1311 1312
				 * For WRITE_INSERT, force the
				 * error to be sent on the wire. It should be
				 * detected by the Target.
1313 1314
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1315 1316 1317 1318 1319 1320 1321
				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));
				}
1322

1323
				rc |= BG_ERR_TGT | BG_ERR_SWAP;
1324
				/* Signals the caller to swap CRC->CSUM */
1325

1326
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1327
					"0817 BLKGRD: Injecting guard error: "
1328 1329
					"write lba x%lx\n", (unsigned long)lba);
				break;
1330
			case SCSI_PROT_WRITE_STRIP:
1331
				/*
1332 1333 1334
				 * For WRITE_STRIP and WRITE_PASS,
				 * force the error on data
				 * being copied from SLI-Host to SLI-Port.
1335 1336
				 */
				phba->lpfc_injerr_wgrd_cnt--;
1337 1338 1339 1340 1341 1342 1343
				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));
				}
1344

1345
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1346 1347
				/* Signals the caller to swap CRC->CSUM */

1348
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1349
					"0816 BLKGRD: Injecting guard error: "
1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364
					"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--;
1365 1366 1367 1368 1369 1370 1371
				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));
				}
1372

1373
				rc = BG_ERR_INIT | BG_ERR_SWAP;
1374 1375
				/* Signals the caller to swap CRC->CSUM */

1376
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1377 1378 1379
					"0818 BLKGRD: Injecting guard error: "
					"read lba x%lx\n", (unsigned long)lba);
			}
1380 1381
		}
	}
1382

1383 1384 1385 1386
	return rc;
}
#endif

1387 1388 1389 1390
/**
 * 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.
1391
 * @sc: The SCSI command to examine
1392 1393
 * @txop: (out) BlockGuard operation for transmitted data
 * @rxop: (out) BlockGuard operation for received data
1394 1395 1396
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
1397
 **/
1398
static int
1399 1400
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1401
{
1402
	uint8_t ret = 0;
1403

1404
	if (lpfc_cmd_guard_csum(sc)) {
1405 1406 1407
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1408
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1409
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1410 1411 1412 1413
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1414
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1415
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1416 1417
			break;

1418 1419
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1420
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1421
			*txop = BG_OP_IN_CSUM_OUT_CRC;
1422 1423 1424 1425
			break;

		case SCSI_PROT_NORMAL:
		default:
1426
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1427 1428
				"9063 BLKGRD: Bad op/guard:%d/IP combination\n",
					scsi_get_prot_op(sc));
1429
			ret = 1;
1430 1431 1432
			break;

		}
1433
	} else {
1434 1435 1436
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1437
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1438
			*txop = BG_OP_IN_NODIF_OUT_CRC;
1439 1440 1441 1442
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1443
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1444
			*txop = BG_OP_IN_CRC_OUT_CRC;
1445 1446 1447 1448
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1449
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1450
			*txop = BG_OP_IN_CRC_OUT_NODIF;
1451 1452
			break;

1453 1454
		case SCSI_PROT_NORMAL:
		default:
1455
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1456 1457
				"9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
					scsi_get_prot_op(sc));
1458
			ret = 1;
1459 1460 1461 1462
			break;
		}
	}

1463
	return ret;
1464 1465
}

1466 1467 1468 1469 1470 1471
#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
1472 1473
 * @txop: (out) BlockGuard operation for transmitted data
 * @rxop: (out) BlockGuard operation for received data
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
 **/
static int
lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
{
	uint8_t ret = 0;

1484
	if (lpfc_cmd_guard_csum(sc)) {
1485 1486 1487 1488
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CRC;
1489
			*txop = BG_OP_IN_CRC_OUT_NODIF;
1490 1491 1492 1493 1494
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
			*rxop = BG_OP_IN_CSUM_OUT_NODIF;
1495
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1496 1497 1498 1499
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1500
			*rxop = BG_OP_IN_CSUM_OUT_CRC;
1501
			*txop = BG_OP_IN_CRC_OUT_CSUM;
1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513
			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;
1514
			*txop = BG_OP_IN_NODIF_OUT_CSUM;
1515 1516 1517 1518
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1519
			*rxop = BG_OP_IN_CSUM_OUT_CSUM;
1520
			*txop = BG_OP_IN_CSUM_OUT_CSUM;
1521 1522 1523 1524 1525
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1526
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
			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
1544
 * @datasegcnt: number of segments of data that have been dma mapped
1545 1546
 *
 * This function sets up BPL buffer list for protection groups of
1547 1548 1549 1550 1551 1552 1553 1554 1555
 * 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:
 *                                +-------------------------+
1556 1557 1558
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
1559 1560 1561 1562 1563 1564 1565 1566
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 *
 * Note: Data s/g buffers have been dma mapped
1567 1568 1569
 *
 * Returns the number of BDEs added to the BPL.
 **/
1570 1571 1572 1573 1574
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 */
1575 1576
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1577
	dma_addr_t physaddr;
1578
	int i = 0, num_bde = 0, status;
1579
	int datadir = sc->sc_data_direction;
1580
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1581
	uint32_t rc;
1582
#endif
1583
	uint32_t checking = 1;
1584
	uint32_t reftag;
1585
	uint8_t txop, rxop;
1586

1587 1588
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1589 1590
		goto out;

1591
	/* extract some info from the scsi command for pde*/
1592
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
1593

1594
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1595
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1596
	if (rc) {
1597
		if (rc & BG_ERR_SWAP)
1598
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1599
		if (rc & BG_ERR_CHECK)
1600 1601
			checking = 0;
	}
1602 1603
#endif

1604 1605 1606 1607 1608
	/* 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);

1609
	/* Endianness conversion if necessary for PDE5 */
1610
	pde5->word0 = cpu_to_le32(pde5->word0);
1611
	pde5->reftag = cpu_to_le32(reftag);
1612

1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
	/* 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);
1623 1624 1625 1626 1627

	/*
	 * We only need to check the data on READs, for WRITEs
	 * protection data is automatically generated, not checked.
	 */
1628
	if (datadir == DMA_FROM_DEVICE) {
1629
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1630 1631 1632 1633
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

1634
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1635 1636 1637
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);
1638 1639
	}
	bf_set(pde6_ai, pde6, 1);
1640 1641
	bf_set(pde6_ae, pde6, 0);
	bf_set(pde6_apptagval, pde6, 0);
1642

1643
	/* Endianness conversion if necessary for PDE6 */
1644 1645 1646 1647
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

1648
	/* advance bpl and increment bde count */
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670
	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;
}

1671 1672 1673 1674 1675 1676 1677 1678 1679 1680
/**
 * 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
1681 1682 1683 1684 1685 1686 1687 1688 1689
 *
 * 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:
 *                                    +-------------------------+
1690
 *   start of first prot group  -->   |          PDE_5          |
1691
 *                                    +-------------------------+
1692 1693 1694
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
1695 1696 1697 1698 1699
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
1700
 *   start of new  prot group  -->    |          PDE_5          |
1701 1702 1703 1704 1705 1706
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
1707 1708 1709
 *
 * Returns the number of BDEs added to the BPL.
 **/
1710 1711 1712 1713 1714 1715
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 */
1716 1717
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1718
	struct lpfc_pde7 *pde7 = NULL;
1719 1720
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
1721 1722
	unsigned int split_offset;
	unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
1723 1724
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
1725
	int status;
1726 1727 1728
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
1729
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1730
	uint32_t rc;
1731
#endif
1732
	uint32_t checking = 1;
1733
	uint32_t reftag;
1734
	uint8_t txop, rxop;
1735 1736 1737 1738 1739 1740
	int num_bde = 0;

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

	if (!sgpe || !sgde) {
1741
		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1742
				"9020 Invalid s/g entry: data=x%px prot=x%px\n",
1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
				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
1756
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1757
	if (rc) {
1758
		if (rc & BG_ERR_SWAP)
1759
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1760
		if (rc & BG_ERR_CHECK)
1761 1762 1763 1764 1765 1766
			checking = 0;
	}
#endif

	split_offset = 0;
	do {
1767 1768 1769 1770
		/* Check to see if we ran out of space */
		if (num_bde >= (phba->cfg_total_seg_cnt - 2))
			return num_bde + 3;

1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
		/* 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);
1790

1791
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
1792 1793 1794 1795
			bf_set(pde6_ce, pde6, checking);
		else
			bf_set(pde6_ce, pde6, 0);

1796
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
1797 1798 1799 1800
			bf_set(pde6_re, pde6, checking);
		else
			bf_set(pde6_re, pde6, 0);

1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
		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) {
1848 1849 1850 1851
			/* Check to see if we ran out of space */
			if (num_bde >= phba->cfg_total_seg_cnt)
				return num_bde + 1;

1852
			if (!sgde) {
1853
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
					"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 */
1916 1917
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
					"9054 BLKGRD: bug in %s\n", __func__);
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
		}

	} 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
1931 1932
 * @datasegcnt: number of segments of data that have been dma mapped
 * @lpfc_cmd: lpfc scsi command object pointer.
1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957
 *
 * 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,
1958 1959
		struct sli4_sge *sgl, int datasegcnt,
		struct lpfc_io_buf *lpfc_cmd)
1960 1961 1962 1963 1964 1965 1966
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct sli4_sge_diseed *diseed = NULL;
	dma_addr_t physaddr;
	int i = 0, num_sge = 0, status;
	uint32_t reftag;
	uint8_t txop, rxop;
1967
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1968
	uint32_t rc;
1969
#endif
1970 1971 1972
	uint32_t checking = 1;
	uint32_t dma_len;
	uint32_t dma_offset = 0;
1973 1974 1975
	struct sli4_hybrid_sgl *sgl_xtra = NULL;
	int j;
	bool lsp_just_set = false;
1976 1977 1978 1979 1980 1981 1982 1983 1984

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

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

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1985
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
1986
	if (rc) {
1987
		if (rc & BG_ERR_SWAP)
1988
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
1989
		if (rc & BG_ERR_CHECK)
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
			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;

2003 2004 2005 2006 2007
	/*
	 * 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) {
2008
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
2009 2010 2011 2012
			bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);

2013
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2014 2015 2016 2017 2018
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
	}

2019 2020 2021
	/* 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);
2022

2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
	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 */
2035 2036 2037 2038 2039
	sgde = scsi_sglist(sc);
	j = 3;
	for (i = 0; i < datasegcnt; i++) {
		/* clear it */
		sgl->word2 = 0;
2040

2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091
		/* do we need to expand the segment */
		if (!lsp_just_set && !((j + 1) % phba->border_sge_num) &&
		    ((datasegcnt - 1) != i)) {
			/* set LSP type */
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);

			sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);

			if (unlikely(!sgl_xtra)) {
				lpfc_cmd->seg_cnt = 0;
				return 0;
			}
			sgl->addr_lo = cpu_to_le32(putPaddrLow(
						sgl_xtra->dma_phys_sgl));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(
						sgl_xtra->dma_phys_sgl));

		} else {
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
		}

		if (!(bf_get(lpfc_sli4_sge_type, sgl) & LPFC_SGE_TYPE_LSP)) {
			if ((datasegcnt - 1) == i)
				bf_set(lpfc_sli4_sge_last, sgl, 1);
			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));

			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
			sgl->word2 = cpu_to_le32(sgl->word2);
			sgl->sge_len = cpu_to_le32(dma_len);

			dma_offset += dma_len;
			sgde = sg_next(sgde);

			sgl++;
			num_sge++;
			lsp_just_set = false;

		} else {
			sgl->word2 = cpu_to_le32(sgl->word2);
			sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);

			sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
			i = i - 1;

			lsp_just_set = true;
		}

		j++;
2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105

	}

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
2106
 * @lpfc_cmd: lpfc scsi command object pointer.
2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
 *
 * 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,
2139 2140
		struct sli4_sge *sgl, int datacnt, int protcnt,
		struct lpfc_io_buf *lpfc_cmd)
2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156
{
	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;
2157
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2158
	uint32_t rc;
2159
#endif
2160 2161
	uint32_t checking = 1;
	uint32_t dma_offset = 0;
2162 2163
	int num_sge = 0, j = 2;
	struct sli4_hybrid_sgl *sgl_xtra = NULL;
2164 2165 2166 2167 2168

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

	if (!sgpe || !sgde) {
2169
		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2170
				"9082 Invalid s/g entry: data=x%px prot=x%px\n",
2171 2172 2173 2174
				sgpe, sgde);
		return 0;
	}

2175 2176
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
2177 2178
		goto out;

2179
	/* extract some info from the scsi command */
2180
	blksize = lpfc_cmd_blksize(sc);
2181
	reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2182

2183
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2184
	rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2185
	if (rc) {
2186
		if (rc & BG_ERR_SWAP)
2187
			lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2188
		if (rc & BG_ERR_CHECK)
2189 2190
			checking = 0;
	}
2191 2192
#endif

2193 2194
	split_offset = 0;
	do {
2195
		/* Check to see if we ran out of space */
2196 2197
		if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) &&
		    !(phba->cfg_xpsgl))
2198 2199
			return num_sge + 3;

2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226
		/* DISEED and DIF have to be together */
		if (!((j + 1) % phba->border_sge_num) ||
		    !((j + 2) % phba->border_sge_num) ||
		    !((j + 3) % phba->border_sge_num)) {
			sgl->word2 = 0;

			/* set LSP type */
			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);

			sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);

			if (unlikely(!sgl_xtra)) {
				goto out;
			} else {
				sgl->addr_lo = cpu_to_le32(putPaddrLow(
						sgl_xtra->dma_phys_sgl));
				sgl->addr_hi = cpu_to_le32(putPaddrHigh(
						       sgl_xtra->dma_phys_sgl));
			}

			sgl->word2 = cpu_to_le32(sgl->word2);
			sgl->sge_len = cpu_to_le32(phba->cfg_sg_dma_buf_size);

			sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
			j = 0;
		}

2227 2228 2229 2230 2231 2232 2233 2234 2235
		/* 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;

2236
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254
			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;
			}
		}


2255
		if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
2256 2257 2258 2259
			bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
		else
			bf_set(lpfc_sli4_sge_dif_re, diseed, 0);

2260 2261 2262
		/* 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);
2263

2264 2265 2266 2267 2268 2269 2270 2271 2272
		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++;
2273

2274
		sgl++;
2275
		j++;
2276 2277

		/* setup the first BDE that points to protection buffer */
2278 2279
		protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
		protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2280 2281 2282 2283

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

2284 2285 2286 2287 2288 2289
		/* 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);
2290
		sgl->sge_len = 0;
2291

2292 2293 2294
		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

2295 2296 2297
		/* 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);
2298 2299
			protgroup_offset += protgroup_remainder;
			protgrp_blks = protgroup_remainder / 8;
2300
			protgrp_bytes = protgrp_blks * blksize;
2301 2302 2303 2304
		} else {
			protgroup_offset = 0;
			curr_prot++;
		}
2305

2306
		num_sge++;
2307

2308
		/* setup SGE's for data blocks associated with DIF data */
2309 2310
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
2311 2312 2313 2314

		sgl++;
		j++;

2315
		while (!pgdone) {
2316
			/* Check to see if we ran out of space */
2317 2318
			if ((num_sge >= phba->cfg_total_seg_cnt) &&
			    !phba->cfg_xpsgl)
2319 2320
				return num_sge + 1;

2321
			if (!sgde) {
2322
				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2323
					"9086 BLKGRD:%s Invalid data segment\n",
2324 2325 2326 2327
						__func__);
				return 0;
			}

2328 2329
			if (!((j + 1) % phba->border_sge_num)) {
				sgl->word2 = 0;
2330

2331 2332 2333
				/* set LSP type */
				bf_set(lpfc_sli4_sge_type, sgl,
				       LPFC_SGE_TYPE_LSP);
2334

2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351
				sgl_xtra = lpfc_get_sgl_per_hdwq(phba,
								 lpfc_cmd);

				if (unlikely(!sgl_xtra)) {
					goto out;
				} else {
					sgl->addr_lo = cpu_to_le32(
					  putPaddrLow(sgl_xtra->dma_phys_sgl));
					sgl->addr_hi = cpu_to_le32(
					  putPaddrHigh(sgl_xtra->dma_phys_sgl));
				}

				sgl->word2 = cpu_to_le32(sgl->word2);
				sgl->sge_len = cpu_to_le32(
						     phba->cfg_sg_dma_buf_size);

				sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
2352
			} else {
2353 2354
				dataphysaddr = sg_dma_address(sgde) +
								   split_offset;
2355

2356
				remainder = sg_dma_len(sgde) - split_offset;
2357

2358 2359 2360 2361
				if ((subtotal + remainder) <= protgrp_bytes) {
					/* we can use this whole buffer */
					dma_len = remainder;
					split_offset = 0;
2362

2363 2364 2365 2366 2367 2368 2369 2370 2371 2372
					if ((subtotal + remainder) ==
								  protgrp_bytes)
						pgdone = 1;
				} else {
					/* must split this buffer with next
					 * prot grp
					 */
					dma_len = protgrp_bytes - subtotal;
					split_offset += dma_len;
				}
2373

2374
				subtotal += dma_len;
2375

2376 2377 2378 2379 2380 2381 2382 2383 2384
				sgl->word2 = 0;
				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);
2385

2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404
				sgl->sge_len = cpu_to_le32(dma_len);
				dma_offset += dma_len;

				num_sge++;
				curr_data++;

				if (split_offset) {
					sgl++;
					j++;
					break;
				}

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

				sgl++;
			}

			j++;
2405 2406
		}

2407 2408 2409 2410 2411 2412
		if (protgroup_offset) {
			/* update the reference tag */
			reftag += protgrp_blks;
			continue;
		}

2413 2414
		/* are we done ? */
		if (curr_prot == protcnt) {
2415 2416
			/* mark the last SGL */
			sgl--;
2417
			bf_set(lpfc_sli4_sge_last, sgl, 1);
2418 2419 2420 2421 2422 2423 2424 2425 2426
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
2427 2428
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
					"9085 BLKGRD: bug in %s\n", __func__);
2429 2430 2431
		}

	} while (!alldone);
2432

2433 2434
out:

2435
	return num_sge;
2436
}
2437

2438 2439 2440 2441 2442
/**
 * 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
 *
2443 2444 2445
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
2446 2447 2448
 * Returns: Protection group type (with or without DIF)
 *
 **/
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466
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:
2467
		if (phba)
2468
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2469 2470
					"9021 Unsupported protection op:%d\n",
					op);
2471 2472 2473 2474 2475
		break;
	}
	return ret;
}

2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487
/**
 * 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,
2488
		       struct lpfc_io_buf *lpfc_cmd)
2489 2490 2491 2492 2493 2494 2495 2496
{
	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) {
2497
		/* Read check for protection data */
2498 2499 2500 2501
		if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
			return fcpdl;

	} else {
2502
		/* Write check for protection data */
2503 2504 2505 2506 2507 2508
		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
2509 2510
	 * DIF (trailer) attached to it. Must ajust FCP data length
	 * to account for the protection data.
2511
	 */
2512
	fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2513 2514 2515 2516

	return fcpdl;
}

2517 2518 2519 2520 2521
/**
 * 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.
 *
2522 2523
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2524 2525 2526 2527
 * two functions eventually, but for now, it's here.
 * RETURNS 0 - SUCCESS,
 *         1 - Failed DMA map, retry.
 *         2 - Invalid scsi cmd or prot-type. Do not rety.
2528
 **/
2529
static int
2530
lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2531
		struct lpfc_io_buf *lpfc_cmd)
2532 2533 2534
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2535
	struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
2536 2537 2538 2539
	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;
2540
	int fcpdl;
2541
	int ret = 1;
2542
	struct lpfc_vport *vport = phba->pport;
2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562

	/*
	 * 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;
2563 2564

		/* First check if data segment count from SCSI Layer is good */
2565 2566 2567
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
			WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
			ret = 2;
2568
			goto err;
2569
		}
2570 2571 2572 2573 2574

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
2575 2576

			/* Here we need to add a PDE5 and PDE6 to the count */
2577 2578
			if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) {
				ret = 2;
2579
				goto err;
2580
			}
2581

2582 2583
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
2584
			/* we should have 2 or more entries in buffer list */
2585 2586
			if (num_bde < 2) {
				ret = 2;
2587
				goto err;
2588
			}
2589
			break;
2590 2591

		case LPFC_PG_TYPE_DIF_BUF:
2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605
			/*
			 * 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;
2606 2607 2608 2609 2610 2611

			/*
			 * There is a minimun of 4 BPLs used for every
			 * protection data segment.
			 */
			if ((lpfc_cmd->prot_seg_cnt * 4) >
2612 2613
			    (phba->cfg_total_seg_cnt - 2)) {
				ret = 2;
2614
				goto err;
2615
			}
2616 2617 2618

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
2619
			/* we should have 3 or more entries in buffer list */
2620
			if ((num_bde < 3) ||
2621 2622
			    (num_bde > phba->cfg_total_seg_cnt)) {
				ret = 2;
2623
				goto err;
2624
			}
2625
			break;
2626

2627 2628
		case LPFC_PG_TYPE_INVALID:
		default:
2629 2630 2631
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

2632
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2633 2634
					"9022 Unexpected protection group %i\n",
					prot_group_type);
2635
			return 2;
2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649
		}
	}

	/*
	 * 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;

2650
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2651 2652 2653 2654 2655 2656 2657 2658
	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;

2659 2660 2661 2662 2663 2664 2665 2666
	/*
	 * For First burst, we may need to adjust the initial transfer
	 * length for DIF
	 */
	if (iocb_cmd->un.fcpi.fcpi_XRdy &&
	    (fcpdl < vport->cfg_first_burst_size))
		iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;

2667
	return 0;
2668
err:
2669 2670 2671 2672 2673 2674 2675
	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);

2676
	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2677 2678 2679 2680
			"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,
2681
			prot_group_type, num_bde);
2682 2683 2684

	lpfc_cmd->seg_cnt = 0;
	lpfc_cmd->prot_seg_cnt = 0;
2685
	return ret;
2686 2687
}

2688 2689 2690 2691 2692
/*
 * This function calcuates the T10 DIF guard tag
 * on the specified data using a CRC algorithmn
 * using crc_t10dif.
 */
2693
static uint16_t
2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708
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.
 */
2709
static uint16_t
2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
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.
 */
2722
static void
2723
lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
2724 2725 2726 2727 2728 2729
{
	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;
2730
	uint16_t guard_tag;
2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771
	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;

2772
		src = (struct scsi_dif_tuple *)sg_virt(sgpe);
2773
		start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
2774 2775 2776 2777 2778 2779 2780 2781 2782
		start_app_tag = src->app_tag;
		len = sgpe->length;
		while (src && protsegcnt) {
			while (len) {

				/*
				 * First check to see if a protection data
				 * check is valid
				 */
2783 2784
				if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
				    (src->app_tag == T10_PI_APP_ESCAPE)) {
2785 2786 2787 2788
					start_ref_tag++;
					goto skipit;
				}

2789
				/* First Guard Tag checking */
2790 2791
				if (chk_guard) {
					guard_tag = src->guard_tag;
2792
					if (lpfc_cmd_guard_csum(cmd))
2793 2794 2795 2796 2797 2798 2799 2800 2801 2802
						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;
					}
				}
2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817

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

				/* App Tag checking */
				app_tag = src->app_tag;
				if (chk_app && (app_tag != start_app_tag)) {
					err_type = BGS_APPTAG_ERR_MASK;
					goto out;
				}
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 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859
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);
2860 2861
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
2862 2863 2864 2865 2866 2867 2868 2869 2870
		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);
2871 2872
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
2873 2874 2875 2876 2877 2878 2879 2880 2881 2882

		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);
2883 2884
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
2885 2886 2887 2888 2889 2890 2891 2892 2893

		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);
	}
}

2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 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
/*
 * 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_sli4_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
		       struct lpfc_wcqe_complete *wcqe)
{
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	int ret = 0;
	u32 status = bf_get(lpfc_wcqe_c_status, wcqe);
	u32 bghm = 0;
	u32 bgstat = 0;
	u64 failing_sector = 0;

	if (status == CQE_STATUS_DI_ERROR) {
		if (bf_get(lpfc_wcqe_c_bg_ge, wcqe)) /* Guard Check failed */
			bgstat |= BGS_GUARD_ERR_MASK;
		if (bf_get(lpfc_wcqe_c_bg_ae, wcqe)) /* AppTag Check failed */
			bgstat |= BGS_APPTAG_ERR_MASK;
		if (bf_get(lpfc_wcqe_c_bg_re, wcqe)) /* RefTag Check failed */
			bgstat |= BGS_REFTAG_ERR_MASK;

		/* Check to see if there was any good data before the error */
		if (bf_get(lpfc_wcqe_c_bg_tdpv, wcqe)) {
			bgstat |= BGS_HI_WATER_MARK_PRESENT_MASK;
			bghm = wcqe->total_data_placed;
		}

		/*
		 * Set ALL the error bits to indicate we don't know what
		 * type of error it is.
		 */
		if (!bgstat)
			bgstat |= (BGS_REFTAG_ERR_MASK | BGS_APPTAG_ERR_MASK |
				BGS_GUARD_ERR_MASK);
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
					0x10, 0x1);
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
		phba->bg_guard_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9059 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);
	}

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

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

		phba->bg_reftag_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9060 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);
	}

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

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

		phba->bg_apptag_err_cnt++;
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9062 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);
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
		 */
		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 */

		/* 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;
		}

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

		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
				"9068 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);
	}
	return ret;
}
3038

3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051
/*
 * 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
3052 3053
lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
		  struct lpfc_iocbq *pIocbOut)
3054 3055 3056 3057 3058 3059 3060 3061 3062
{
	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;

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
3063
		cmd->result = DID_ERROR << 16;
3064 3065 3066 3067 3068 3069
		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);
3070 3071 3072 3073 3074
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3075
		cmd->result = DID_ERROR << 16;
3076 3077 3078 3079 3080 3081
		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);
3082 3083 3084 3085 3086 3087 3088 3089 3090
		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);
3091 3092
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3093
		phba->bg_guard_err_cnt++;
3094 3095 3096 3097 3098 3099
		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);
3100 3101 3102 3103 3104 3105 3106
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x3);
3107 3108
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3109 3110

		phba->bg_reftag_err_cnt++;
3111 3112 3113 3114 3115 3116
		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);
3117 3118 3119 3120 3121 3122 3123
	}

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

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x2);
3124 3125
		cmd->result = DRIVER_SENSE << 24 | DID_ABORT << 16 |
			      SAM_STAT_CHECK_CONDITION;
3126 3127

		phba->bg_apptag_err_cnt++;
3128 3129 3130 3131 3132 3133
		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);
3134 3135 3136 3137 3138
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
3139 3140 3141
		 * field, and put the failing LBA in it.
		 * This code assumes there was also a guard/app/ref tag error
		 * indication.
3142
		 */
3143 3144 3145 3146
		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 */
3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161

		/* 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;
		}
3162 3163 3164 3165

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

3166 3167
		/* Descriptor Information */
		put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3168 3169 3170 3171
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
3172 3173 3174 3175 3176 3177 3178 3179 3180
		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);
3181 3182 3183
	}
out:
	return ret;
3184 3185
}

3186 3187 3188 3189 3190 3191 3192 3193 3194
/**
 * 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:
3195 3196
 *	2 - Error - Do not retry
 *	1 - Error - Retry
3197
 *	0 - Success
3198 3199
 **/
static int
3200
lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3201 3202 3203 3204
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct scatterlist *sgel = NULL;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3205
	struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
3206
	struct sli4_sge *first_data_sgl;
3207 3208 3209
	struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
	struct lpfc_vport *vport = phba->pport;
	union lpfc_wqe128 *wqe = &pwqeq->wqe;
3210 3211 3212 3213
	dma_addr_t physaddr;
	uint32_t num_bde = 0;
	uint32_t dma_len;
	uint32_t dma_offset = 0;
3214
	int nseg, i, j;
3215
	struct ulp_bde64 *bde;
3216 3217
	bool lsp_just_set = false;
	struct sli4_hybrid_sgl *sgl_xtra = NULL;
3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233

	/*
	 * 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);
3234
		if (unlikely(nseg <= 0))
3235 3236 3237 3238 3239 3240 3241
			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;
3242
		first_data_sgl = sgl;
3243
		lpfc_cmd->seg_cnt = nseg;
3244 3245
		if (!phba->cfg_xpsgl &&
		    lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3246 3247 3248 3249 3250 3251
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
					"9074 BLKGRD:"
					" %s: Too many sg segments from "
					"dma_map_sg.  Config %d, seg_cnt %d\n",
					__func__, phba->cfg_sg_seg_cnt,
					lpfc_cmd->seg_cnt);
3252
			WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
3253
			lpfc_cmd->seg_cnt = 0;
3254
			scsi_dma_unmap(scsi_cmnd);
3255
			return 2;
3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266
		}

		/*
		 * 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.
		 */
3267 3268 3269 3270 3271 3272 3273

		/* for tracking segment boundaries */
		sgel = scsi_sglist(scsi_cmnd);
		j = 2;
		for (i = 0; i < nseg; i++) {
			sgl->word2 = 0;
			if ((num_bde + 1) == nseg) {
3274
				bf_set(lpfc_sli4_sge_last, sgl, 1);
3275 3276 3277
				bf_set(lpfc_sli4_sge_type, sgl,
				       LPFC_SGE_TYPE_DATA);
			} else {
3278
				bf_set(lpfc_sli4_sge_last, sgl, 0);
3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340

				/* do we need to expand the segment */
				if (!lsp_just_set &&
				    !((j + 1) % phba->border_sge_num) &&
				    ((nseg - 1) != i)) {
					/* set LSP type */
					bf_set(lpfc_sli4_sge_type, sgl,
					       LPFC_SGE_TYPE_LSP);

					sgl_xtra = lpfc_get_sgl_per_hdwq(
							phba, lpfc_cmd);

					if (unlikely(!sgl_xtra)) {
						lpfc_cmd->seg_cnt = 0;
						scsi_dma_unmap(scsi_cmnd);
						return 1;
					}
					sgl->addr_lo = cpu_to_le32(putPaddrLow(
						       sgl_xtra->dma_phys_sgl));
					sgl->addr_hi = cpu_to_le32(putPaddrHigh(
						       sgl_xtra->dma_phys_sgl));

				} else {
					bf_set(lpfc_sli4_sge_type, sgl,
					       LPFC_SGE_TYPE_DATA);
				}
			}

			if (!(bf_get(lpfc_sli4_sge_type, sgl) &
				     LPFC_SGE_TYPE_LSP)) {
				if ((nseg - 1) == i)
					bf_set(lpfc_sli4_sge_last, sgl, 1);

				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));

				bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
				sgl->word2 = cpu_to_le32(sgl->word2);
				sgl->sge_len = cpu_to_le32(dma_len);

				dma_offset += dma_len;
				sgel = sg_next(sgel);

				sgl++;
				lsp_just_set = false;

			} else {
				sgl->word2 = cpu_to_le32(sgl->word2);
				sgl->sge_len = cpu_to_le32(
						     phba->cfg_sg_dma_buf_size);

				sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
				i = i - 1;

				lsp_just_set = true;
			}

			j++;
3341
		}
3342 3343
		/*
		 * Setup the first Payload BDE. For FCoE we just key off
3344 3345
		 * Performance Hints, for FC we use lpfc_enable_pbde.
		 * We populate words 13-15 of IOCB/WQE.
3346 3347
		 */
		if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
3348
		    phba->cfg_enable_pbde) {
3349
			bde = (struct ulp_bde64 *)
3350
				&wqe->words[13];
3351 3352 3353 3354 3355 3356
			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);
3357 3358 3359

		} else {
			memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
3360
		}
3361 3362 3363 3364 3365 3366
	} 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);
3367 3368 3369 3370

		if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
		    phba->cfg_enable_pbde) {
			bde = (struct ulp_bde64 *)
3371
				&wqe->words[13];
3372 3373
			memset(bde, 0, (sizeof(uint32_t) * 3));
		}
3374 3375
	}

3376 3377 3378 3379
	/* Word 11 */
	if (phba->cfg_enable_pbde)
		bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);

3380 3381 3382 3383 3384 3385 3386
	/*
	 * 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));
3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403
	/* Set first-burst provided it was successfully negotiated */
	if (!(phba->hba_flag & HBA_FCOE_MODE) &&
	    vport->cfg_first_burst_size &&
	    scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
		u32 init_len, total_len;

		total_len = be32_to_cpu(fcp_cmnd->fcpDl);
		init_len = min(total_len, vport->cfg_first_burst_size);

		/* Word 4 & 5 */
		wqe->fcp_iwrite.initial_xfer_len = init_len;
		wqe->fcp_iwrite.total_xfer_len = total_len;
	} else {
		/* Word 4 */
		wqe->fcp_iwrite.total_xfer_len =
			be32_to_cpu(fcp_cmnd->fcpDl);
	}
3404 3405 3406 3407 3408

	/*
	 * If the OAS driver feature is enabled and the lun is enabled for
	 * OAS, set the oas iocb related flags.
	 */
3409
	if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3410
		scsi_cmnd->device->hostdata)->oas_enabled) {
3411
		lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
3412 3413
		lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
			scsi_cmnd->device->hostdata)->priority;
3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424

		/* Word 10 */
		bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
		bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);

		if (lpfc_cmd->cur_iocbq.priority)
			bf_set(wqe_ccp, &wqe->generic.wqe_com,
			       (lpfc_cmd->cur_iocbq.priority << 1));
		else
			bf_set(wqe_ccp, &wqe->generic.wqe_com,
			       (phba->cfg_XLanePriority << 1));
3425
	}
3426

3427 3428 3429
	return 0;
}

3430 3431 3432 3433 3434 3435 3436 3437
/**
 * 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
3438 3439 3440 3441
 * Return codes:
 *	2 - Error - Do not retry
 *	1 - Error - Retry
 *	0 - Success
3442 3443 3444
 **/
static int
lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3445
		struct lpfc_io_buf *lpfc_cmd)
3446 3447 3448
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3449
	struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl);
3450 3451
	struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
	union lpfc_wqe128 *wqe = &pwqeq->wqe;
3452
	uint32_t num_sge = 0;
3453 3454 3455
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
	int fcpdl;
3456
	int ret = 1;
3457
	struct lpfc_vport *vport = phba->pport;
3458 3459 3460

	/*
	 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3461
	 *  fcp_rsp regions to the first data sge entry
3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483
	 */
	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;
3484 3485

		/* First check if data segment count from SCSI Layer is good */
3486 3487
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt &&
		    !phba->cfg_xpsgl) {
3488 3489
			WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
			ret = 2;
3490
			goto err;
3491
		}
3492 3493 3494 3495 3496

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
3497
			/* Here we need to add a DISEED to the count */
3498 3499 3500
			if (((lpfc_cmd->seg_cnt + 1) >
					phba->cfg_total_seg_cnt) &&
			    !phba->cfg_xpsgl) {
3501
				ret = 2;
3502
				goto err;
3503
			}
3504 3505

			num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3506
					datasegcnt, lpfc_cmd);
3507

3508
			/* we should have 2 or more entries in buffer list */
3509 3510
			if (num_sge < 2) {
				ret = 2;
3511
				goto err;
3512
			}
3513
			break;
3514 3515

		case LPFC_PG_TYPE_DIF_BUF:
3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529
			/*
			 * 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;
3530 3531 3532 3533
			/*
			 * There is a minimun of 3 SGEs used for every
			 * protection data segment.
			 */
3534 3535 3536
			if (((lpfc_cmd->prot_seg_cnt * 3) >
					(phba->cfg_total_seg_cnt - 2)) &&
			    !phba->cfg_xpsgl) {
3537
				ret = 2;
3538
				goto err;
3539
			}
3540

3541
			num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3542
					datasegcnt, protsegcnt, lpfc_cmd);
3543

3544
			/* we should have 3 or more entries in buffer list */
3545 3546 3547
			if (num_sge < 3 ||
			    (num_sge > phba->cfg_total_seg_cnt &&
			     !phba->cfg_xpsgl)) {
3548
				ret = 2;
3549
				goto err;
3550
			}
3551
			break;
3552

3553 3554
		case LPFC_PG_TYPE_INVALID:
		default:
3555 3556 3557
			scsi_dma_unmap(scsi_cmnd);
			lpfc_cmd->seg_cnt = 0;

3558
			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3559 3560
					"9083 Unexpected protection group %i\n",
					prot_group_type);
3561
			return 2;
3562 3563 3564
		}
	}

3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579
	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;
	}

3580 3581 3582
	fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
	fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);

3583 3584 3585 3586 3587
	/* Set first-burst provided it was successfully negotiated */
	if (!(phba->hba_flag & HBA_FCOE_MODE) &&
	    vport->cfg_first_burst_size &&
	    scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
		u32 init_len, total_len;
3588

3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599
		total_len = be32_to_cpu(fcp_cmnd->fcpDl);
		init_len = min(total_len, vport->cfg_first_burst_size);

		/* Word 4 & 5 */
		wqe->fcp_iwrite.initial_xfer_len = init_len;
		wqe->fcp_iwrite.total_xfer_len = total_len;
	} else {
		/* Word 4 */
		wqe->fcp_iwrite.total_xfer_len =
			be32_to_cpu(fcp_cmnd->fcpDl);
	}
3600

3601 3602 3603 3604 3605
	/*
	 * If the OAS driver feature is enabled and the lun is enabled for
	 * OAS, set the oas iocb related flags.
	 */
	if ((phba->cfg_fof) && ((struct lpfc_device_data *)
3606
		scsi_cmnd->device->hostdata)->oas_enabled) {
3607 3608
		lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);

3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626
		/* Word 10 */
		bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
		bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);
		bf_set(wqe_ccp, &wqe->generic.wqe_com,
		       (phba->cfg_XLanePriority << 1));
	}

	/* Word 7. DIF Flags */
	if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_PASS)
		bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU);
	else if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_STRIP)
		bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_STRIP);
	else if (lpfc_cmd->cur_iocbq.iocb_flag & LPFC_IO_DIF_INSERT)
		bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_INSERT);

	lpfc_cmd->cur_iocbq.iocb_flag &= ~(LPFC_IO_DIF_PASS |
				 LPFC_IO_DIF_STRIP | LPFC_IO_DIF_INSERT);

3627 3628
	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_TRACE_EVENT,
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
	return ret;
3646 3647
}

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
 **/
static inline int
3661
lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3662 3663 3664 3665
{
	return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
}

3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679
/**
 * 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
3680
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
3681 3682 3683 3684
{
	return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
}

3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704
/**
 * lpfc_scsi_prep_cmnd_buf - Wrapper function for IOCB/WQE 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.
 * @tmo: Timeout value for IO
 *
 * This routine initializes IOCB/WQE data structure from scsi command
 *
 * Return codes:
 *	1 - Error
 *	0 - Success
 **/
static inline int
lpfc_scsi_prep_cmnd_buf(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
			uint8_t tmo)
{
	return vport->phba->lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, tmo);
}

3705
/**
3706
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3707 3708 3709 3710 3711 3712 3713 3714 3715 3716
 * @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,
3717
		struct lpfc_io_buf *lpfc_cmd, uint32_t fcpi_parm) {
3718 3719 3720 3721 3722 3723 3724 3725
	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;
	struct lpfc_fast_path_event *fast_path_evt = NULL;
	struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
	unsigned long flags;

3726
	if (!pnode)
3727 3728
		return;

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 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797
	/* 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;
}
3798 3799

/**
3800
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3801
 * @phba: The HBA for which this call is being executed.
3802 3803 3804
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
3805
 * field of @lpfc_cmd for device with SLI-3 interface spec.
3806
 **/
3807
static void
3808
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
3809 3810 3811 3812 3813 3814 3815
{
	/*
	 * 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.
	 */
3816 3817
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
3818 3819 3820 3821
	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);
3822 3823
}

3824
/**
3825
 * lpfc_handler_fcp_err - FCP response handler
3826
 * @vport: The virtual port for which this call is being executed.
3827
 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
3828 3829 3830 3831 3832 3833
 * @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.
 **/
3834
static void
3835
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
3836
		    uint32_t fcpi_parm)
3837 3838 3839 3840 3841 3842
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
3843
	uint32_t *lp;
3844 3845
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
3846
	uint32_t fcpDl;
3847
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3848

3849

3850 3851 3852 3853 3854 3855 3856 3857 3858 3859
	/*
	 *  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;
	}

3860 3861
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
3862
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3863 3864 3865 3866 3867 3868
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
					 "2719 Invalid response length: "
					 "tgt x%x lun x%llx cmnd x%x rsplen "
					 "x%x\n", cmnd->device->id,
					 cmnd->device->lun, cmnd->cmnd[0],
					 rsplen);
3869 3870 3871
			host_status = DID_ERROR;
			goto out;
		}
3872
		if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3873
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
3874 3875
				 "2757 Protocol failure detected during "
				 "processing of FCP I/O op: "
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Hannes Reinecke committed
3876
				 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
3877 3878 3879 3880 3881 3882
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 fcprsp->rspInfo3);
			host_status = DID_ERROR;
			goto out;
		}
3883 3884
	}

3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895
	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;

3896 3897 3898 3899 3900 3901 3902 3903 3904
	/* 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;
	}
3905

3906
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
3907
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
3908 3909 3910 3911 3912 3913 3914
			 "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);
3915

3916
	scsi_set_resid(cmnd, 0);
3917
	fcpDl = be32_to_cpu(fcpcmd->fcpDl);
3918
	if (resp_info & RESID_UNDER) {
3919
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3920

3921
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3922
				 "9025 FCP Underrun, expected %d, "
3923
				 "residual %d Data: x%x x%x x%x\n",
3924
				 fcpDl,
3925 3926
				 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
				 cmnd->underflow);
3927

3928
		/*
3929
		 * If there is an under run, check if under run reported by
3930 3931 3932
		 * storage array is same as the under run reported by HBA.
		 * If this is not same, there is a dropped frame.
		 */
3933
		if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
3934 3935
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
3936
					 "9026 FCP Read Check Error "
3937
					 "and Underrun Data: x%x x%x x%x x%x\n",
3938
					 fcpDl,
3939 3940
					 scsi_get_resid(cmnd), fcpi_parm,
					 cmnd->cmnd[0]);
3941
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3942 3943
			host_status = DID_ERROR;
		}
3944 3945
		/*
		 * The cmnd->underflow is the minimum number of bytes that must
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Lucas De Marchi committed
3946
		 * be transferred for this command.  Provided a sense condition
3947 3948 3949 3950 3951
		 * 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) &&
3952 3953
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
3954
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3955
					 "9027 FCP command x%x residual "
3956 3957
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
3958
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
3959
					 scsi_get_resid(cmnd), cmnd->underflow);
3960 3961 3962
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
3963
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3964
				 "9028 FCP command x%x residual overrun error. "
3965
				 "Data: x%x x%x\n", cmnd->cmnd[0],
3966
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3967 3968 3969 3970
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
3971
	 * (fcpi_parm should be zero). Apply check only to reads.
3972
	 */
3973
	} else if (fcpi_parm) {
3974
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3975
				 "9029 FCP %s Check Error Data: "
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3976
				 "x%x x%x x%x x%x x%x\n",
3977 3978 3979
				 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
				 "Read" : "Write"),
				 fcpDl, be32_to_cpu(fcprsp->rspResId),
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3980
				 fcpi_parm, cmnd->cmnd[0], scsi_status);
3981 3982 3983 3984 3985 3986 3987 3988

		/* There is some issue with the LPe12000 that causes it
		 * to miscalculate the fcpi_parm and falsely trip this
		 * recovery logic.  Detect this case and don't error when true.
		 */
		if (fcpi_parm > fcpDl)
			goto out;

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3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999
		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;
		}
4000
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
4001 4002 4003
	}

 out:
4004
	cmnd->result = host_status << 16 | scsi_status;
4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, fcpi_parm);
}

/**
 * lpfc_fcp_io_cmd_wqe_cmpl - Complete a FCP IO
 * @phba: The hba for which this call is being executed.
 * @pwqeIn: The command WQE for the scsi cmnd.
 * @pwqeOut: The response WQE for the scsi cmnd.
 *
 * This routine assigns scsi command result by looking into response WQE
 * status field appropriately. This routine handles QUEUE FULL condition as
 * well by ramping down device queue depth.
 **/
static void
lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
			 struct lpfc_wcqe_complete *wcqe)
{
	struct lpfc_io_buf *lpfc_cmd =
		(struct lpfc_io_buf *)pwqeIn->context1;
	struct lpfc_vport *vport = pwqeIn->vport;
4025 4026
	struct lpfc_rport_data *rdata;
	struct lpfc_nodelist *ndlp;
4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042
	struct scsi_cmnd *cmd;
	unsigned long flags;
	struct lpfc_fast_path_event *fast_path_evt;
	struct Scsi_Host *shost;
	u32 logit = LOG_FCP;
	u32 status, idx;
	unsigned long iflags = 0;

	/* Sanity check on return of outstanding command */
	if (!lpfc_cmd) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
				 "9032 Null lpfc_cmd pointer. No "
				 "release, skip completion\n");
		return;
	}

4043 4044 4045
	rdata = lpfc_cmd->rdata;
	ndlp = rdata->pnode;

4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334
	if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
		/* TOREMOVE - currently this flag is checked during
		 * the release of lpfc_iocbq. Remove once we move
		 * to lpfc_wqe_job construct.
		 *
		 * This needs to be done outside buf_lock
		 */
		spin_lock_irqsave(&phba->hbalock, iflags);
		lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_EXCHANGE_BUSY;
		spin_unlock_irqrestore(&phba->hbalock, iflags);
	}

	/* Guard against abort handler being called at same time */
	spin_lock(&lpfc_cmd->buf_lock);

	/* Sanity check on return of outstanding command */
	cmd = lpfc_cmd->pCmd;
	if (!cmd || !phba) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
				 "9042 I/O completion: Not an active IO\n");
		spin_unlock(&lpfc_cmd->buf_lock);
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}
	idx = lpfc_cmd->cur_iocbq.hba_wqidx;
	if (phba->sli4_hba.hdwq)
		phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
		this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
#endif
	shost = cmd->device->host;

	status = bf_get(lpfc_wcqe_c_status, wcqe);
	lpfc_cmd->status = (status & LPFC_IOCB_STATUS_MASK);
	lpfc_cmd->result = (wcqe->parameter & IOERR_PARAM_MASK);

	lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
	if (bf_get(lpfc_wcqe_c_xb, wcqe))
		lpfc_cmd->flags |= LPFC_SBUF_XBUSY;

#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
	if (unlikely(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;
		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))
			logit = 0;
		else
			logit = LOG_FCP | LOG_FCP_UNDER;
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
				 "9034 FCP cmd x%x failed <%d/%lld> "
				 "status: x%x result: x%x "
				 "sid: x%x did: x%x oxid: x%x "
				 "Data: x%x x%x x%x\n",
				 cmd->cmnd[0],
				 cmd->device ? cmd->device->id : 0xffff,
				 cmd->device ? cmd->device->lun : 0xffff,
				 lpfc_cmd->status, lpfc_cmd->result,
				 vport->fc_myDID,
				 (ndlp) ? ndlp->nlp_DID : 0,
				 lpfc_cmd->cur_iocbq.sli4_xritag,
				 wcqe->parameter, wcqe->total_data_placed,
				 lpfc_cmd->cur_iocbq.iotag);
	}

	switch (lpfc_cmd->status) {
	case IOSTAT_SUCCESS:
		cmd->result = DID_OK << 16;
		break;
	case IOSTAT_FCP_RSP_ERROR:
		lpfc_handle_fcp_err(vport, lpfc_cmd,
				    pwqeIn->wqe.fcp_iread.total_xfer_len -
				    wcqe->total_data_placed);
		break;
	case IOSTAT_NPORT_BSY:
	case IOSTAT_FABRIC_BSY:
		cmd->result = DID_TRANSPORT_DISRUPTED << 16;
		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 (ndlp) {
			memcpy(&fast_path_evt->un.fabric_evt.wwpn,
			       &ndlp->nlp_portname,
				sizeof(struct lpfc_name));
			memcpy(&fast_path_evt->un.fabric_evt.wwnn,
			       &ndlp->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);
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
				 "9035 Fabric/Node busy FCP cmd x%x failed"
				 " <%d/%lld> "
				 "status: x%x result: x%x "
				 "sid: x%x did: x%x oxid: x%x "
				 "Data: x%x x%x x%x\n",
				 cmd->cmnd[0],
				 cmd->device ? cmd->device->id : 0xffff,
				 cmd->device ? cmd->device->lun : 0xffff,
				 lpfc_cmd->status, lpfc_cmd->result,
				 vport->fc_myDID,
				 (ndlp) ? ndlp->nlp_DID : 0,
				 lpfc_cmd->cur_iocbq.sli4_xritag,
				 wcqe->parameter,
				 wcqe->total_data_placed,
				 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
		break;
	case IOSTAT_REMOTE_STOP:
		if (ndlp) {
			/* This I/O 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, ndlp,
					    lpfc_cmd->cur_iocbq.sli4_lxritag,
					    0, 0);
		}
		fallthrough;
	case IOSTAT_LOCAL_REJECT:
		if (lpfc_cmd->result & IOERR_DRVR_MASK)
			lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		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 = DID_NO_CONNECT << 16;
			break;
		}
		if (lpfc_cmd->result == IOERR_INVALID_RPI ||
		    lpfc_cmd->result == IOERR_NO_RESOURCES ||
		    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
		    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
			cmd->result = DID_REQUEUE << 16;
			break;
		}
		if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
		     lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
		     status == CQE_STATUS_DI_ERROR) {
			if (scsi_get_prot_op(cmd) !=
			    SCSI_PROT_NORMAL) {
				/*
				 * This is a response for a BG enabled
				 * cmd. Parse BG error
				 */
				lpfc_sli4_parse_bg_err(phba, lpfc_cmd,
						       wcqe);
				break;
			}
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
				 "9040 non-zero BGSTAT on unprotected cmd\n");
		}
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
				 "9036 Local Reject FCP cmd x%x failed"
				 " <%d/%lld> "
				 "status: x%x result: x%x "
				 "sid: x%x did: x%x oxid: x%x "
				 "Data: x%x x%x x%x\n",
				 cmd->cmnd[0],
				 cmd->device ? cmd->device->id : 0xffff,
				 cmd->device ? cmd->device->lun : 0xffff,
				 lpfc_cmd->status, lpfc_cmd->result,
				 vport->fc_myDID,
				 (ndlp) ? ndlp->nlp_DID : 0,
				 lpfc_cmd->cur_iocbq.sli4_xritag,
				 wcqe->parameter,
				 wcqe->total_data_placed,
				 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
		fallthrough;
	default:
		if (lpfc_cmd->status >= IOSTAT_CNT)
			lpfc_cmd->status = IOSTAT_DEFAULT;
		cmd->result = DID_ERROR << 16;
		lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
				 "9037 FCP Completion Error: xri %x "
				 "status x%x result x%x [x%x] "
				 "placed x%x\n",
				 lpfc_cmd->cur_iocbq.sli4_xritag,
				 lpfc_cmd->status, lpfc_cmd->result,
				 wcqe->parameter,
				 wcqe->total_data_placed);
	}
	if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
		u32 *lp = (u32 *)cmd->sense_buffer;

		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "9039 Iodone <%d/%llu> cmd x%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));
	}

	lpfc_update_stats(vport, lpfc_cmd);

	if (vport->cfg_max_scsicmpl_time &&
	    time_after(jiffies, lpfc_cmd->start_time +
	    msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
		spin_lock_irqsave(shost->host_lock, flags);
		if (ndlp) {
			if (ndlp->cmd_qdepth >
				atomic_read(&ndlp->cmd_pending) &&
				(atomic_read(&ndlp->cmd_pending) >
				LPFC_MIN_TGT_QDEPTH) &&
				(cmd->cmnd[0] == READ_10 ||
				cmd->cmnd[0] == WRITE_10))
				ndlp->cmd_qdepth =
					atomic_read(&ndlp->cmd_pending);

			ndlp->last_change_time = jiffies;
		}
		spin_unlock_irqrestore(shost->host_lock, flags);
	}
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (lpfc_cmd->ts_cmd_start) {
		lpfc_cmd->ts_isr_cmpl = lpfc_cmd->cur_iocbq.isr_timestamp;
		lpfc_cmd->ts_data_io = ktime_get_ns();
		phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
		lpfc_io_ktime(phba, lpfc_cmd);
	}
#endif
	lpfc_cmd->pCmd = NULL;
	spin_unlock(&lpfc_cmd->buf_lock);

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

	/*
	 * If there is an abort thread waiting for command completion
	 * wake up the thread.
	 */
	spin_lock(&lpfc_cmd->buf_lock);
	lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
	spin_unlock(&lpfc_cmd->buf_lock);

	lpfc_release_scsi_buf(phba, lpfc_cmd);
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}

4337
/**
4338
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
4339 4340
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
4341
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
4342 4343 4344 4345 4346
 *
 * 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.
 **/
4347 4348 4349 4350
static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
			struct lpfc_iocbq *pIocbOut)
{
4351 4352
	struct lpfc_io_buf *lpfc_cmd =
		(struct lpfc_io_buf *) pIocbIn->context1;
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James Smart committed
4353
	struct lpfc_vport      *vport = pIocbIn->vport;
4354 4355
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
4356
	struct scsi_cmnd *cmd;
4357
	unsigned long flags;
4358
	struct lpfc_fast_path_event *fast_path_evt;
4359
	struct Scsi_Host *shost;
4360
	int idx;
4361
	uint32_t logit = LOG_FCP;
4362

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	/* Guard against abort handler being called at same time */
	spin_lock(&lpfc_cmd->buf_lock);

4366 4367
	/* Sanity check on return of outstanding command */
	cmd = lpfc_cmd->pCmd;
4368
	if (!cmd || !phba) {
4369
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4370 4371
				 "2621 IO completion: Not an active IO\n");
		spin_unlock(&lpfc_cmd->buf_lock);
4372
		return;
4373
	}
4374 4375 4376 4377 4378

	idx = lpfc_cmd->cur_iocbq.hba_wqidx;
	if (phba->sli4_hba.hdwq)
		phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;

4379
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4380 4381
	if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
		this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
4382
#endif
4383 4384
	shost = cmd->device->host;

4385
	lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
4386
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
4387
	/* pick up SLI4 exhange busy status from HBA */
4388 4389 4390 4391
	if (pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY)
		lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
	else
		lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
4392

4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423
#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
4424

4425
	if (unlikely(lpfc_cmd->status)) {
4426 4427 4428 4429 4430
		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;
4431 4432 4433 4434
		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))
4435 4436 4437 4438
			logit = 0;
		else
			logit = LOG_FCP | LOG_FCP_UNDER;
		lpfc_printf_vlog(vport, KERN_WARNING, logit,
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Hannes Reinecke committed
4439
			 "9030 FCP cmd x%x failed <%d/%lld> "
4440 4441 4442
			 "status: x%x result: x%x "
			 "sid: x%x did: x%x oxid: x%x "
			 "Data: x%x x%x\n",
4443 4444 4445 4446
			 cmd->cmnd[0],
			 cmd->device ? cmd->device->id : 0xffff,
			 cmd->device ? cmd->device->lun : 0xffff,
			 lpfc_cmd->status, lpfc_cmd->result,
4447 4448
			 vport->fc_myDID,
			 (pnode) ? pnode->nlp_DID : 0,
4449 4450
			 phba->sli_rev == LPFC_SLI_REV4 ?
			     lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4451 4452
			 pIocbOut->iocb.ulpContext,
			 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4453 4454 4455 4456

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
4457 4458
			lpfc_handle_fcp_err(vport, lpfc_cmd,
					    pIocbOut->iocb.un.fcpi.fcpi_parm);
4459 4460 4461
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
4462
			cmd->result = DID_TRANSPORT_DISRUPTED << 16;
4463 4464 4465 4466 4467 4468 4469 4470
			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;
4471
			if (pnode) {
4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486
				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);
4487
			break;
4488
		case IOSTAT_LOCAL_REJECT:
4489
		case IOSTAT_REMOTE_STOP:
4490 4491 4492 4493 4494 4495
			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) {
4496
				cmd->result = DID_NO_CONNECT << 16;
4497 4498
				break;
			}
4499
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4500
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
4501 4502
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4503
				cmd->result = DID_REQUEUE << 16;
4504
				break;
4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520
			}
			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 "
4521
							"on unprotected cmd\n");
4522 4523
				}
			}
4524 4525
			if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
				&& (phba->sli_rev == LPFC_SLI_REV4)
4526
				&& pnode) {
4527 4528 4529 4530 4531
				/* 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,
4532 4533
					lpfc_cmd->cur_iocbq.sli4_lxritag,
					0, 0);
4534
			}
4535
			fallthrough;
4536
		default:
4537
			cmd->result = DID_ERROR << 16;
4538 4539 4540
			break;
		}

4541
		if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4542 4543
			cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
				      SAM_STAT_BUSY;
4544
	} else
4545
		cmd->result = DID_OK << 16;
4546 4547 4548 4549

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

4550
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4551
				 "0710 Iodone <%d/%llu> cmd x%px, error "
4552 4553 4554 4555
				 "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));
4556 4557
	}

4558
	lpfc_update_stats(vport, lpfc_cmd);
4559 4560 4561
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4562
		spin_lock_irqsave(shost->host_lock, flags);
4563
		if (pnode) {
4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574
			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;
		}
4575
		spin_unlock_irqrestore(shost->host_lock, flags);
4576
	}
4577
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4578

4579 4580
	lpfc_cmd->pCmd = NULL;
	spin_unlock(&lpfc_cmd->buf_lock);
4581

4582 4583 4584 4585 4586 4587 4588 4589
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (lpfc_cmd->ts_cmd_start) {
		lpfc_cmd->ts_isr_cmpl = pIocbIn->isr_timestamp;
		lpfc_cmd->ts_data_io = ktime_get_ns();
		phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
		lpfc_io_ktime(phba, lpfc_cmd);
	}
#endif
4590 4591 4592
	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	cmd->scsi_done(cmd);

4593
	/*
4594
	 * If there is an abort thread waiting for command completion
4595 4596
	 * wake up the thread.
	 */
4597
	spin_lock(&lpfc_cmd->buf_lock);
4598
	lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
4599
	if (lpfc_cmd->waitq)
4600
		wake_up(lpfc_cmd->waitq);
4601
	spin_unlock(&lpfc_cmd->buf_lock);
4602

4603
	lpfc_release_scsi_buf(phba, lpfc_cmd);
4604 4605
}

4606
/**
4607 4608 4609 4610
 * lpfc_scsi_prep_cmnd_buf_s3 - SLI-3 IOCB init for the IO
 * @phba: Pointer to vport object for which I/O is executed
 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
 * @tmo: timeout value for the IO
4611
 *
4612 4613 4614
 * Based on the data-direction of the command, initialize IOCB
 * in the I/O buffer. Fill in the IOCB fields which are independent
 * of the scsi buffer
4615
 *
4616
 * RETURNS 0 - SUCCESS,
4617
 **/
4618 4619 4620
static int lpfc_scsi_prep_cmnd_buf_s3(struct lpfc_vport *vport,
				      struct lpfc_io_buf *lpfc_cmd,
				      uint8_t tmo)
4621
{
4622 4623
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	struct lpfc_iocbq *piocbq = &lpfc_cmd->cur_iocbq;
4624 4625
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4626
	struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
4627
	int datadir = scsi_cmnd->sc_data_direction;
4628
	u32 fcpdl;
4629

4630
	piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
4631

4632 4633 4634 4635 4636 4637
	/*
	 * 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.
	 */
4638
	if (scsi_sg_count(scsi_cmnd)) {
4639 4640
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4641
			iocb_cmd->ulpPU = PARM_READ_CHECK;
4642 4643
			if (vport->cfg_first_burst_size &&
			    (pnode->nlp_flag & NLP_FIRSTBURST)) {
4644 4645
				u32 xrdy_len;

4646
				fcpdl = scsi_bufflen(scsi_cmnd);
4647 4648 4649
				xrdy_len = min(fcpdl,
					       vport->cfg_first_burst_size);
				piocbq->iocb.un.fcpi.fcpi_XRdy = xrdy_len;
4650
			}
4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			fcp_cmnd->fcpCntl3 = READ_DATA;
		}
	} else {
		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
		iocb_cmd->un.fcpi.fcpi_parm = 0;
		iocb_cmd->ulpPU = 0;
		fcp_cmnd->fcpCntl3 = 0;
	}
4663

4664 4665 4666 4667 4668 4669 4670
	/*
	 * Finish initializing those IOCB fields that are independent
	 * of the scsi_cmnd request_buffer
	 */
	piocbq->iocb.ulpContext = pnode->nlp_rpi;
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		piocbq->iocb.ulpFCP2Rcvy = 1;
4671 4672
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
4673 4674 4675

	piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
	piocbq->context1  = lpfc_cmd;
4676 4677 4678
	if (!piocbq->iocb_cmpl)
		piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
	piocbq->iocb.ulpTimeout = tmo;
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4679
	piocbq->vport = vport;
4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784
	return 0;
}

/**
 * lpfc_scsi_prep_cmnd_buf_s4 - SLI-4 WQE init for the IO
 * @phba: Pointer to vport object for which I/O is executed
 * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
 * @tmo: timeout value for the IO
 *
 * Based on the data-direction of the command copy WQE template
 * to I/O buffer WQE. Fill in the WQE fields which are independent
 * of the scsi buffer
 *
 * RETURNS 0 - SUCCESS,
 **/
static int lpfc_scsi_prep_cmnd_buf_s4(struct lpfc_vport *vport,
				      struct lpfc_io_buf *lpfc_cmd,
				      uint8_t tmo)
{
	struct lpfc_hba *phba = vport->phba;
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	struct lpfc_sli4_hdw_queue *hdwq = NULL;
	struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
	struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
	union lpfc_wqe128 *wqe = &pwqeq->wqe;
	u16 idx = lpfc_cmd->hdwq_no;
	int datadir = scsi_cmnd->sc_data_direction;

	hdwq = &phba->sli4_hba.hdwq[idx];

	/* Initialize 64 bytes only */
	memset(wqe, 0, sizeof(union lpfc_wqe128));

	/*
	 * There are three possibilities here - use scatter-gather segment, use
	 * the single mapping, or neither.
	 */
	if (scsi_sg_count(scsi_cmnd)) {
		if (datadir == DMA_TO_DEVICE) {
			/* From the iwrite template, initialize words 7 -  11 */
			memcpy(&wqe->words[7],
			       &lpfc_iwrite_cmd_template.words[7],
			       sizeof(uint32_t) * 5);

			fcp_cmnd->fcpCntl3 = WRITE_DATA;
			if (hdwq)
				hdwq->scsi_cstat.output_requests++;
		} else {
			/* From the iread template, initialize words 7 - 11 */
			memcpy(&wqe->words[7],
			       &lpfc_iread_cmd_template.words[7],
			       sizeof(uint32_t) * 5);

			/* Word 7 */
			bf_set(wqe_tmo, &wqe->fcp_iread.wqe_com, tmo);

			fcp_cmnd->fcpCntl3 = READ_DATA;
			if (hdwq)
				hdwq->scsi_cstat.input_requests++;
		}
	} else {
		/* From the icmnd template, initialize words 4 - 11 */
		memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
		       sizeof(uint32_t) * 8);

		/* Word 7 */
		bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, tmo);

		fcp_cmnd->fcpCntl3 = 0;
		if (hdwq)
			hdwq->scsi_cstat.control_requests++;
	}

	/*
	 * Finish initializing those WQE fields that are independent
	 * of the request_buffer
	 */

	 /* Word 3 */
	bf_set(payload_offset_len, &wqe->fcp_icmd,
	       sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));

	/* Word 6 */
	bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
	       phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
	bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);

	/* Word 7*/
	if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
		bf_set(wqe_erp, &wqe->generic.wqe_com, 1);

	bf_set(wqe_class, &wqe->generic.wqe_com,
	       (pnode->nlp_fcp_info & 0x0f));

	 /* Word 8 */
	wqe->generic.wqe_com.abort_tag = pwqeq->iotag;

	/* Word 9 */
	bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);

	pwqeq->vport = vport;
	pwqeq->vport = vport;
	pwqeq->context1 = lpfc_cmd;
	pwqeq->hba_wqidx = lpfc_cmd->hdwq_no;
4785
	pwqeq->wqe_cmpl = lpfc_fcp_io_cmd_wqe_cmpl;
4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828

	return 0;
}

/**
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
 * @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
 * to transfer for device with SLI3 interface spec.
 **/
static int
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
		    struct lpfc_nodelist *pnode)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
	u8 *ptr;

	if (!pnode)
		return 0;

	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;

	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
		       &lpfc_cmd->fcp_cmnd->fcp_lun);

	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));
	}

	fcp_cmnd->fcpCntl1 = SIMPLE_Q;

	lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, lpfc_cmd->timeout);

	return 0;
4829 4830
}

4831
/**
4832
 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4833
 * @vport: The virtual port for which this call is being executed.
4834
 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
4835 4836 4837
 * @lun: Logical unit number.
 * @task_mgmt_cmd: SCSI task management command.
 *
4838 4839
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
4840 4841 4842 4843 4844
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
4845
static int
4846
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4847
			     struct lpfc_io_buf *lpfc_cmd,
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4848
			     uint64_t lun,
4849 4850 4851 4852 4853
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
4854
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4855 4856
	struct lpfc_nodelist *ndlp = rdata->pnode;

4857
	if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4858 4859 4860
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
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4861 4862
	piocbq->vport = vport;

4863 4864 4865
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
4866 4867 4868
	/* 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);
4869
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4870 4871
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4872
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4873 4874
	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
	piocb->ulpContext = ndlp->nlp_rpi;
4875 4876 4877 4878
	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
		piocb->ulpContext =
		  vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
	}
4879
	piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
4880
	piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4881 4882
	piocb->ulpPU = 0;
	piocb->un.fcpi.fcpi_parm = 0;
4883 4884 4885 4886 4887 4888 4889 4890

	/* 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;
4891
	} else
4892
		piocb->ulpTimeout = lpfc_cmd->timeout;
4893

4894 4895
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4896

4897
	return 1;
4898 4899 4900
}

/**
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Lucas De Marchi committed
4901
 * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912
 * @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)
{

4913 4914
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;

4915 4916 4917
	switch (dev_grp) {
	case LPFC_PCI_DEV_LP:
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4918
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4919
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4920
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4921
		phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s3;
4922
		break;
4923 4924
	case LPFC_PCI_DEV_OC:
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4925
		phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4926
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4927
		phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4928
		phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s4;
4929
		break;
4930
	default:
4931
		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4932 4933 4934 4935 4936
				"1418 Invalid HBA PCI-device group: 0x%x\n",
				dev_grp);
		return -ENODEV;
	}
	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4937
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4938 4939 4940
	return 0;
}

4941
/**
4942
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4943 4944 4945 4946 4947 4948 4949
 * @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.
 **/
4950 4951 4952 4953 4954
static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
			struct lpfc_iocbq *cmdiocbq,
			struct lpfc_iocbq *rspiocbq)
{
4955 4956
	struct lpfc_io_buf *lpfc_cmd =
		(struct lpfc_io_buf *) cmdiocbq->context1;
4957 4958 4959 4960 4961
	if (lpfc_cmd)
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	return;
}

4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976
/**
 * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
 *                             if issuing a pci_bus_reset is possibly unsafe
 * @phba: lpfc_hba pointer.
 *
 * Description:
 * Walks the bus_list to ensure only PCI devices with Emulex
 * vendor id, device ids that support hot reset, and only one occurrence
 * of function 0.
 *
 * Returns:
 * -EBADSLT,  detected invalid device
 *      0,    successful
 */
int
4977
lpfc_check_pci_resettable(struct lpfc_hba *phba)
4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021
{
	const struct pci_dev *pdev = phba->pcidev;
	struct pci_dev *ptr = NULL;
	u8 counter = 0;

	/* Walk the list of devices on the pci_dev's bus */
	list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
		/* Check for Emulex Vendor ID */
		if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
					"8346 Non-Emulex vendor found: "
					"0x%04x\n", ptr->vendor);
			return -EBADSLT;
		}

		/* Check for valid Emulex Device ID */
		switch (ptr->device) {
		case PCI_DEVICE_ID_LANCER_FC:
		case PCI_DEVICE_ID_LANCER_G6_FC:
		case PCI_DEVICE_ID_LANCER_G7_FC:
			break;
		default:
			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
					"8347 Invalid device found: "
					"0x%04x\n", ptr->device);
			return -EBADSLT;
		}

		/* Check for only one function 0 ID to ensure only one HBA on
		 * secondary bus
		 */
		if (ptr->devfn == 0) {
			if (++counter > 1) {
				lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
						"8348 More than one device on "
						"secondary bus found\n");
				return -EBADSLT;
			}
		}
	}

	return 0;
}

5022
/**
5023
 * lpfc_info - Info entry point of scsi_host_template data structure
5024 5025 5026 5027 5028 5029 5030
 * @host: The scsi host for which this call is being executed.
 *
 * This routine provides module information about hba.
 *
 * Reutrn code:
 *   Pointer to char - Success.
 **/
5031 5032 5033
const char *
lpfc_info(struct Scsi_Host *host)
{
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5034 5035
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5036 5037 5038
	int link_speed = 0;
	static char lpfcinfobuf[384];
	char tmp[384] = {0};
5039

5040
	memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
5041
	if (phba && phba->pcidev){
5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057
		/* Model Description */
		scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
		if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
		    sizeof(lpfcinfobuf))
			goto buffer_done;

		/* PCI Info */
		scnprintf(tmp, sizeof(tmp),
			  " on PCI bus %02x device %02x irq %d",
			  phba->pcidev->bus->number, phba->pcidev->devfn,
			  phba->pcidev->irq);
		if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
		    sizeof(lpfcinfobuf))
			goto buffer_done;

		/* Port Number */
5058
		if (phba->Port[0]) {
5059 5060 5061 5062
			scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
			if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
			    sizeof(lpfcinfobuf))
				goto buffer_done;
5063
		}
5064 5065

		/* Link Speed */
5066
		link_speed = lpfc_sli_port_speed_get(phba);
5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079
		if (link_speed != 0) {
			scnprintf(tmp, sizeof(tmp),
				  " Logical Link Speed: %d Mbps", link_speed);
			if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
			    sizeof(lpfcinfobuf))
				goto buffer_done;
		}

		/* PCI resettable */
		if (!lpfc_check_pci_resettable(phba)) {
			scnprintf(tmp, sizeof(tmp), " PCI resettable");
			strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
		}
5080
	}
5081 5082

buffer_done:
5083 5084 5085
	return lpfcinfobuf;
}

5086
/**
5087
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
5088 5089 5090 5091 5092
 * @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.
 **/
5093 5094 5095 5096 5097
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
	unsigned long  poll_tmo_expires =
		(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));

5098
	if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
5099 5100 5101 5102
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

5103
/**
5104
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
5105 5106 5107 5108
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
5109 5110 5111 5112 5113
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

5114
/**
5115
 * lpfc_poll_timeout - Restart polling timer
5116
 * @t: Timer construct where lpfc_hba data structure pointer is obtained.
5117 5118 5119 5120
 *
 * This routine restarts fcp_poll timer, when FCP ring  polling is enable
 * and FCP Ring interrupt is disable.
 **/
5121
void lpfc_poll_timeout(struct timer_list *t)
5122
{
5123
	struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
5124 5125

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5126
		lpfc_sli_handle_fast_ring_event(phba,
5127
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5128

5129 5130 5131 5132 5133
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

5134
/**
5135
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
5136
 * @shost: kernel scsi host pointer.
5137 5138 5139 5140 5141 5142 5143 5144 5145 5146
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * 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.
 **/
5147
static int
5148
lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
5149
{
James Smart's avatar
James Smart committed
5150 5151
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5152
	struct lpfc_rport_data *rdata;
5153
	struct lpfc_nodelist *ndlp;
5154
	struct lpfc_io_buf *lpfc_cmd;
5155
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
5156
	int err, idx;
5157 5158 5159 5160 5161 5162
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	uint64_t start = 0L;

	if (phba->ktime_on)
		start = ktime_get_ns();
#endif
5163

5164
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5165 5166 5167 5168 5169

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

5170 5171 5172
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
5173 5174
		goto out_fail_command;
	}
5175
	ndlp = rdata->pnode;
5176

5177
	if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
5178
		(!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
5179

5180
		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5181 5182 5183
				"9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
				" op:%02x str=%s without registering for"
				" BlockGuard - Rejecting command\n",
5184 5185 5186 5187 5188
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

5189
	/*
5190 5191
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
5192
	 */
5193
	if (!ndlp)
5194
		goto out_tgt_busy;
5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223
	if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
		if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
					 "3377 Target Queue Full, scsi Id:%d "
					 "Qdepth:%d Pending command:%d"
					 " WWNN:%02x:%02x:%02x:%02x:"
					 "%02x:%02x:%02x:%02x, "
					 " WWPN:%02x:%02x:%02x:%02x:"
					 "%02x:%02x:%02x:%02x",
					 ndlp->nlp_sid, ndlp->cmd_qdepth,
					 atomic_read(&ndlp->cmd_pending),
					 ndlp->nlp_nodename.u.wwn[0],
					 ndlp->nlp_nodename.u.wwn[1],
					 ndlp->nlp_nodename.u.wwn[2],
					 ndlp->nlp_nodename.u.wwn[3],
					 ndlp->nlp_nodename.u.wwn[4],
					 ndlp->nlp_nodename.u.wwn[5],
					 ndlp->nlp_nodename.u.wwn[6],
					 ndlp->nlp_nodename.u.wwn[7],
					 ndlp->nlp_portname.u.wwn[0],
					 ndlp->nlp_portname.u.wwn[1],
					 ndlp->nlp_portname.u.wwn[2],
					 ndlp->nlp_portname.u.wwn[3],
					 ndlp->nlp_portname.u.wwn[4],
					 ndlp->nlp_portname.u.wwn[5],
					 ndlp->nlp_portname.u.wwn[6],
					 ndlp->nlp_portname.u.wwn[7]);
			goto out_tgt_busy;
		}
5224
	}
5225

5226
	lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd);
5227
	if (lpfc_cmd == NULL) {
5228
		lpfc_rampdown_queue_depth(phba);
5229

5230
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
5231 5232
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
5233 5234 5235 5236 5237 5238 5239 5240 5241
		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;
5242
	lpfc_cmd->ndlp = ndlp;
5243
	lpfc_cmd->cur_iocbq.iocb_cmpl = NULL;
5244 5245
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;

5246 5247 5248 5249
	err = lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
	if (err)
		goto out_host_busy_release_buf;

5250
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
5251
		if (vport->phba->cfg_enable_bg) {
5252 5253
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
5254 5255 5256 5257 5258 5259 5260
					 "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));
5261
		}
5262 5263
		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
5264
		if (vport->phba->cfg_enable_bg) {
5265 5266
			lpfc_printf_vlog(vport,
					 KERN_INFO, LOG_SCSI_CMD,
5267 5268 5269 5270
					 "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),
5271
					 blk_rq_sectors(cmnd->request),
5272
					 (cmnd->cmnd[1]>>5));
5273
		}
5274 5275 5276
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

5277 5278 5279 5280 5281
	if (unlikely(err)) {
		if (err == 2) {
			cmnd->result = DID_ERROR << 16;
			goto out_fail_command_release_buf;
		}
5282
		goto out_host_busy_free_buf;
5283
	}
5284 5285


5286
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
5287 5288
	if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
		this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
5289
#endif
5290 5291 5292 5293
	/* Issue I/O to adapter */
	err = lpfc_sli_issue_fcp_io(phba, LPFC_FCP_RING,
				    &lpfc_cmd->cur_iocbq,
				    SLI_IOCB_RET_IOCB);
5294 5295 5296 5297 5298 5299 5300 5301 5302
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (start) {
		lpfc_cmd->ts_cmd_start = start;
		lpfc_cmd->ts_last_cmd = phba->ktime_last_cmd;
		lpfc_cmd->ts_cmd_wqput = ktime_get_ns();
	} else {
		lpfc_cmd->ts_cmd_start = 0;
	}
#endif
5303
	if (err) {
5304
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324
				   "3376 FCP could not issue IOCB err %x "
				   "FCP cmd x%x <%d/%llu> "
				   "sid: x%x did: x%x oxid: x%x "
				   "Data: x%x x%x x%x x%x\n",
				   err, cmnd->cmnd[0],
				   cmnd->device ? cmnd->device->id : 0xffff,
				   cmnd->device ? cmnd->device->lun : (u64)-1,
				   vport->fc_myDID, ndlp->nlp_DID,
				   phba->sli_rev == LPFC_SLI_REV4 ?
				   lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
				   phba->sli_rev == LPFC_SLI_REV4 ?
				   phba->sli4_hba.rpi_ids[ndlp->nlp_rpi] :
				   lpfc_cmd->cur_iocbq.iocb.ulpContext,
				   lpfc_cmd->cur_iocbq.iotag,
				   phba->sli_rev == LPFC_SLI_REV4 ?
				   bf_get(wqe_tmo,
				   &lpfc_cmd->cur_iocbq.wqe.generic.wqe_com) :
				   lpfc_cmd->cur_iocbq.iocb.ulpTimeout,
				   (uint32_t)
				   (cmnd->request->timeout / 1000));
5325

5326
		goto out_host_busy_free_buf;
5327
	}
5328

5329
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5330
		lpfc_sli_handle_fast_ring_event(phba,
5331
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5332

5333 5334 5335 5336
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

5337 5338 5339
	if (phba->cfg_xri_rebalancing)
		lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no);

5340 5341 5342
	return 0;

 out_host_busy_free_buf:
5343
	idx = lpfc_cmd->hdwq_no;
5344
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356
	if (phba->sli4_hba.hdwq) {
		switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
		case WRITE_DATA:
			phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--;
			break;
		case READ_DATA:
			phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--;
			break;
		default:
			phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--;
		}
	}
5357
 out_host_busy_release_buf:
5358
	lpfc_release_scsi_buf(phba, lpfc_cmd);
5359 5360 5361
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

5362 5363 5364
 out_tgt_busy:
	return SCSI_MLQUEUE_TARGET_BUSY;

5365 5366 5367
 out_fail_command_release_buf:
	lpfc_release_scsi_buf(phba, lpfc_cmd);

5368
 out_fail_command:
5369
	cmnd->scsi_done(cmnd);
5370 5371 5372
	return 0;
}

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Jeff Garzik committed
5373

5374
/**
5375
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
5376 5377 5378 5379 5380 5381 5382 5383
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
5384
static int
5385
lpfc_abort_handler(struct scsi_cmnd *cmnd)
5386
{
James Smart's avatar
James Smart committed
5387 5388 5389
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
5390
	struct lpfc_iocbq *iocb;
5391
	struct lpfc_io_buf *lpfc_cmd;
5392
	int ret = SUCCESS, status = 0;
5393
	struct lpfc_sli_ring *pring_s4 = NULL;
5394
	struct lpfc_sli_ring *pring = NULL;
5395
	int ret_val;
5396
	unsigned long flags;
5397
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
5398

5399
	status = fc_block_scsi_eh(cmnd);
5400
	if (status != 0 && status != SUCCESS)
5401
		return status;
5402

5403 5404 5405 5406
	lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble;
	if (!lpfc_cmd)
		return ret;

5407
	spin_lock_irqsave(&phba->hbalock, flags);
5408
	/* driver queued commands are in process of being flushed */
5409
	if (phba->hba_flag & HBA_IOQ_FLUSH) {
5410 5411 5412
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3168 SCSI Layer abort requested I/O has been "
			"flushed by LLD.\n");
5413 5414
		ret = FAILED;
		goto out_unlock;
5415 5416
	}

5417 5418 5419 5420
	/* Guard against IO completion being called at same time */
	spin_lock(&lpfc_cmd->buf_lock);

	if (!lpfc_cmd->pCmd) {
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James Smart committed
5421 5422
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
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Hannes Reinecke committed
5423
			 "x%x ID %d LUN %llu\n",
5424
			 SUCCESS, cmnd->device->id, cmnd->device->lun);
5425
		goto out_unlock_buf;
James Smart's avatar
James Smart committed
5426
	}
5427

5428
	iocb = &lpfc_cmd->cur_iocbq;
5429
	if (phba->sli_rev == LPFC_SLI_REV4) {
5430
		pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
5431 5432
		if (!pring_s4) {
			ret = FAILED;
5433
			goto out_unlock_buf;
5434 5435 5436
		}
		spin_lock(&pring_s4->ring_lock);
	}
5437 5438 5439 5440 5441
	/* the command is in process of being cancelled */
	if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			"3169 SCSI Layer abort requested I/O has been "
			"cancelled by LLD.\n");
5442 5443
		ret = FAILED;
		goto out_unlock_ring;
5444
	}
5445
	/*
5446
	 * If pCmd field of the corresponding lpfc_io_buf structure
5447 5448
	 * points to a different SCSI command, then the driver has
	 * already completed this command, but the midlayer did not
5449
	 * see the completion before the eh fired. Just return SUCCESS.
5450
	 */
5451 5452 5453 5454
	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");
5455
		goto out_unlock_ring;
5456
	}
5457

5458
	BUG_ON(iocb->context1 != lpfc_cmd);
5459

5460 5461 5462 5463
	/* abort issued in recovery is still in progress */
	if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "3389 SCSI Layer I/O Abort Request is pending\n");
5464 5465
		if (phba->sli_rev == LPFC_SLI_REV4)
			spin_unlock(&pring_s4->ring_lock);
5466
		spin_unlock(&lpfc_cmd->buf_lock);
5467 5468 5469 5470
		spin_unlock_irqrestore(&phba->hbalock, flags);
		goto wait_for_cmpl;
	}

5471
	lpfc_cmd->waitq = &waitq;
5472
	if (phba->sli_rev == LPFC_SLI_REV4) {
5473
		spin_unlock(&pring_s4->ring_lock);
5474 5475
		ret_val = lpfc_sli4_issue_abort_iotag(phba, iocb,
						      lpfc_sli4_abort_fcp_cmpl);
5476
	} else {
5477 5478 5479
		pring = &phba->sli.sli3_ring[LPFC_FCP_RING];
		ret_val = lpfc_sli_issue_abort_iotag(phba, pring, iocb,
						     lpfc_sli_abort_fcp_cmpl);
5480
	}
5481

5482 5483 5484
	/* Make sure HBA is alive */
	lpfc_issue_hb_tmo(phba);

5485
	if (ret_val != IOCB_SUCCESS) {
5486 5487
		/* Indicate the IO is not being aborted by the driver. */
		lpfc_cmd->waitq = NULL;
5488
		spin_unlock(&lpfc_cmd->buf_lock);
5489
		spin_unlock_irqrestore(&phba->hbalock, flags);
5490 5491 5492
		ret = FAILED;
		goto out;
	}
5493

5494
	/* no longer need the lock after this point */
5495
	spin_unlock(&lpfc_cmd->buf_lock);
5496
	spin_unlock_irqrestore(&phba->hbalock, flags);
5497

5498
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5499
		lpfc_sli_handle_fast_ring_event(phba,
5500
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
5501

5502
wait_for_cmpl:
5503 5504 5505 5506
	/*
	 * iocb_flag is set to LPFC_DRIVER_ABORTED before we wait
	 * for abort to complete.
	 */
5507 5508
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
5509
			   msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
5510

5511
	spin_lock(&lpfc_cmd->buf_lock);
5512

5513 5514
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
5515
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5516
				 "0748 abort handler timed out waiting "
5517
				 "for aborting I/O (xri:x%x) to complete: "
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Hannes Reinecke committed
5518
				 "ret %#x, ID %d, LUN %llu\n",
5519 5520
				 iocb->sli4_xritag, ret,
				 cmnd->device->id, cmnd->device->lun);
5521
	}
5522 5523 5524

	lpfc_cmd->waitq = NULL;

5525
	spin_unlock(&lpfc_cmd->buf_lock);
5526
	goto out;
5527

5528 5529 5530 5531 5532
out_unlock_ring:
	if (phba->sli_rev == LPFC_SLI_REV4)
		spin_unlock(&pring_s4->ring_lock);
out_unlock_buf:
	spin_unlock(&lpfc_cmd->buf_lock);
5533
out_unlock:
5534
	spin_unlock_irqrestore(&phba->hbalock, flags);
5535
out:
5536 5537
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
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Hannes Reinecke committed
5538
			 "LUN %llu\n", ret, cmnd->device->id,
5539
			 cmnd->device->lun);
5540
	return ret;
5541 5542
}

5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565
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";
	}
}

5566 5567 5568 5569

/**
 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
 * @vport: The virtual port for which this call is being executed.
5570
 * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
5571 5572 5573 5574 5575 5576 5577 5578
 *
 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
static int
5579
lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603
{
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	uint32_t rsp_info;
	uint32_t rsp_len;
	uint8_t  rsp_info_code;
	int ret = FAILED;


	if (fcprsp == NULL)
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0703 fcp_rsp is missing\n");
	else {
		rsp_info = fcprsp->rspStatus2;
		rsp_len = be32_to_cpu(fcprsp->rspRspLen);
		rsp_info_code = fcprsp->rspInfo3;


		lpfc_printf_vlog(vport, KERN_INFO,
				 LOG_FCP,
				 "0706 fcp_rsp valid 0x%x,"
				 " rsp len=%d code 0x%x\n",
				 rsp_info,
				 rsp_len, rsp_info_code);

5604 5605 5606 5607 5608 5609
		/* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN
		 * field specifies the number of valid bytes of FCP_RSP_INFO.
		 * The FCP_RSP_LEN field shall be set to 0x04 or 0x08
		 */
		if ((fcprsp->rspStatus2 & RSP_LEN_VALID) &&
		    ((rsp_len == 8) || (rsp_len == 4))) {
5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637
			switch (rsp_info_code) {
			case RSP_NO_FAILURE:
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0715 Task Mgmt No Failure\n");
				ret = SUCCESS;
				break;
			case RSP_TM_NOT_SUPPORTED: /* TM rejected */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0716 Task Mgmt Target "
						"reject\n");
				break;
			case RSP_TM_NOT_COMPLETED: /* TM failed */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0717 Task Mgmt Target "
						"failed TM\n");
				break;
			case RSP_TM_INVALID_LU: /* TM to invalid LU! */
				lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
						 "0718 Task Mgmt to invalid "
						"LUN\n");
				break;
			}
		}
	}
	return ret;
}


5638
/**
5639 5640
 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
 * @vport: The virtual port for which this call is being executed.
5641
 * @cmnd: Pointer to scsi_cmnd data structure.
5642 5643 5644
 * @tgt_id: Target ID of remote device.
 * @lun_id: Lun number for the TMF
 * @task_mgmt_cmd: type of TMF to send
5645
 *
5646 5647
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
5648
 *
5649 5650 5651
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
5652
 **/
5653
static int
5654 5655 5656
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd,
		   unsigned int tgt_id, uint64_t lun_id,
		   uint8_t task_mgmt_cmd)
5657
{
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5658
	struct lpfc_hba   *phba = vport->phba;
5659
	struct lpfc_io_buf *lpfc_cmd;
5660 5661
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
5662 5663
	struct lpfc_rport_data *rdata;
	struct lpfc_nodelist *pnode;
5664
	int ret;
5665
	int status;
5666

5667
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5668
	if (!rdata || !rdata->pnode)
5669
		return FAILED;
5670
	pnode = rdata->pnode;
5671

5672
	lpfc_cmd = lpfc_get_scsi_buf(phba, pnode, NULL);
5673
	if (lpfc_cmd == NULL)
5674
		return FAILED;
5675
	lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
5676
	lpfc_cmd->rdata = rdata;
5677
	lpfc_cmd->pCmd = cmnd;
5678
	lpfc_cmd->ndlp = pnode;
5679

5680 5681
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
5682 5683 5684 5685
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
5686

5687
	iocbq = &lpfc_cmd->cur_iocbq;
5688
	iocbqrsp = lpfc_sli_get_iocbq(phba);
5689 5690 5691 5692
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
5693
	iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5694

5695
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
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5696
			 "0702 Issue %s to TGT %d LUN %llu "
5697
			 "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5698
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5699 5700
			 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
			 iocbq->iocb_flag);
5701

5702
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5703
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
5704 5705
	if ((status != IOCB_SUCCESS) ||
	    (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) {
5706 5707
		if (status != IOCB_SUCCESS ||
		    iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR)
5708
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5709 5710 5711 5712 5713 5714 5715
					 "0727 TMF %s to TGT %d LUN %llu "
					 "failed (%d, %d) iocb_flag x%x\n",
					 lpfc_taskmgmt_name(task_mgmt_cmd),
					 tgt_id, lun_id,
					 iocbqrsp->iocb.ulpStatus,
					 iocbqrsp->iocb.un.ulpWord[4],
					 iocbq->iocb_flag);
5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728 5729
		/* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
		if (status == IOCB_SUCCESS) {
			if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
				/* Something in the FCP_RSP was invalid.
				 * Check conditions */
				ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
			else
				ret = FAILED;
		} else if (status == IOCB_TIMEDOUT) {
			ret = TIMEOUT_ERROR;
		} else {
			ret = FAILED;
		}
	} else
5730 5731
		ret = SUCCESS;

5732
	lpfc_sli_release_iocbq(phba, iocbqrsp);
5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754

	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)
{
5755
	struct lpfc_rport_data *rdata;
5756
	struct lpfc_nodelist *pnode;
5757 5758
	unsigned long later;

5759
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5760 5761
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5762
			"0797 Tgt Map rport failure: rdata x%px\n", rdata);
5763 5764 5765
		return FAILED;
	}
	pnode = rdata->pnode;
5766 5767 5768 5769 5770 5771
	/*
	 * 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)) {
5772
		if (!pnode)
5773 5774 5775 5776
			return FAILED;
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
			return SUCCESS;
		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5777
		rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5778 5779 5780 5781
		if (!rdata)
			return FAILED;
		pnode = rdata->pnode;
	}
5782
	if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811
		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);
5812
	if (cnt)
5813
		lpfc_sli_abort_taskmgmt(vport,
5814
					&phba->sli.sli3_ring[LPFC_FCP_RING],
5815
					tgt_id, lun_id, context);
5816 5817 5818
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5819
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5820 5821
	}
	if (cnt) {
5822
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5823 5824 5825 5826 5827 5828
			"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;
5829
	}
5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848
	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;
5849
	struct lpfc_rport_data *rdata;
5850
	struct lpfc_nodelist *pnode;
5851
	unsigned tgt_id = cmnd->device->id;
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5852
	uint64_t lun_id = cmnd->device->lun;
5853
	struct lpfc_scsi_event_header scsi_event;
5854
	int status;
5855
	u32 logit = LOG_FCP;
5856

5857
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5858
	if (!rdata || !rdata->pnode) {
5859
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5860
				 "0798 Device Reset rdata failure: rdata x%px\n",
5861
				 rdata);
5862 5863 5864
		return FAILED;
	}
	pnode = rdata->pnode;
5865
	status = fc_block_scsi_eh(cmnd);
5866
	if (status != 0 && status != SUCCESS)
5867
		return status;
5868 5869 5870

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
5871
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5872
			"0721 Device Reset rport failure: rdata x%px\n", rdata);
5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884
		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);

5885
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5886
						FCP_LUN_RESET);
5887 5888
	if (status != SUCCESS)
		logit =  LOG_TRACE_EVENT;
5889

5890
	lpfc_printf_vlog(vport, KERN_ERR, logit,
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5891
			 "0713 SCSI layer issued Device Reset (%d, %llu) "
5892 5893 5894 5895 5896 5897 5898 5899
			 "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.
	 */
5900 5901
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5902
						LPFC_CTX_LUN);
5903 5904

	return status;
5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922
}

/**
 * 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;
5923
	struct lpfc_rport_data *rdata;
5924
	struct lpfc_nodelist *pnode;
5925
	unsigned tgt_id = cmnd->device->id;
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5926
	uint64_t lun_id = cmnd->device->lun;
5927
	struct lpfc_scsi_event_header scsi_event;
5928
	int status;
5929
	u32 logit = LOG_FCP;
5930 5931
	unsigned long flags;
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
5932

5933
	rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
5934
	if (!rdata || !rdata->pnode) {
5935
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5936
				 "0799 Target Reset rdata failure: rdata x%px\n",
5937
				 rdata);
5938 5939 5940
		return FAILED;
	}
	pnode = rdata->pnode;
5941
	status = fc_block_scsi_eh(cmnd);
5942
	if (status != 0 && status != SUCCESS)
5943
		return status;
5944 5945 5946

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
5947
		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5948
			"0722 Target Reset rport failure: rdata x%px\n", rdata);
5949
		if (pnode) {
5950
			spin_lock_irqsave(&pnode->lock, flags);
5951 5952
			pnode->nlp_flag &= ~NLP_NPR_ADISC;
			pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
5953
			spin_unlock_irqrestore(&pnode->lock, flags);
5954
		}
5955 5956 5957
		lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					  LPFC_CTX_TGT);
		return FAST_IO_FAIL;
5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968
	}

	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);

5969
	status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id,
5970
					FCP_TARGET_RESET);
5971 5972
	if (status != SUCCESS)
		logit =  LOG_TRACE_EVENT;
5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004
	spin_lock_irqsave(&pnode->lock, flags);
	if (status != SUCCESS &&
	    (!(pnode->upcall_flags & NLP_WAIT_FOR_LOGO)) &&
	     !pnode->logo_waitq) {
		pnode->logo_waitq = &waitq;
		pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
		pnode->nlp_flag |= NLP_ISSUE_LOGO;
		pnode->upcall_flags |= NLP_WAIT_FOR_LOGO;
		spin_unlock_irqrestore(&pnode->lock, flags);
		lpfc_unreg_rpi(vport, pnode);
		wait_event_timeout(waitq,
				   (!(pnode->upcall_flags & NLP_WAIT_FOR_LOGO)),
				    msecs_to_jiffies(vport->cfg_devloss_tmo *
				    1000));

		if (pnode->upcall_flags & NLP_WAIT_FOR_LOGO) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
				"0725 SCSI layer TGTRST failed & LOGO TMO "
				" (%d, %llu) return x%x\n", tgt_id,
				 lun_id, status);
			spin_lock_irqsave(&pnode->lock, flags);
			pnode->upcall_flags &= ~NLP_WAIT_FOR_LOGO;
		} else {
			spin_lock_irqsave(&pnode->lock, flags);
		}
		pnode->logo_waitq = NULL;
		spin_unlock_irqrestore(&pnode->lock, flags);
		status = SUCCESS;
	} else {
		status = FAILED;
		spin_unlock_irqrestore(&pnode->lock, flags);
	}
6005

6006
	lpfc_printf_vlog(vport, KERN_ERR, logit,
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6007
			 "0723 SCSI layer issued Target Reset (%d, %llu) "
6008 6009 6010 6011 6012 6013 6014 6015
			 "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.
	 */
6016 6017
	if (status == SUCCESS)
		status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
6018
					  LPFC_CTX_TGT);
6019
	return status;
6020 6021
}

6022
/**
6023
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
6024 6025
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
6026 6027
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
6028
 *
6029 6030 6031
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
6032
 **/
6033
static int
6034
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
6035
{
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6036 6037
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
6038
	struct lpfc_nodelist *ndlp = NULL;
6039
	struct lpfc_scsi_event_header scsi_event;
6040 6041
	int match;
	int ret = SUCCESS, status, i;
6042
	u32 logit = LOG_FCP;
6043 6044 6045 6046 6047 6048 6049

	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));

6050 6051
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
6052

6053
	status = fc_block_scsi_eh(cmnd);
6054
	if (status != 0 && status != SUCCESS)
6055
		return status;
6056

6057 6058 6059 6060 6061
	/*
	 * 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.
	 */
6062
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
6063
		/* Search for mapped node by target ID */
6064
		match = 0;
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6065 6066
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
6067

6068 6069 6070
			if (vport->phba->cfg_fcp2_no_tgt_reset &&
			    (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
				continue;
6071
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
6072
			    ndlp->nlp_sid == i &&
6073 6074
			    ndlp->rport &&
			    ndlp->nlp_type & NLP_FCP_TARGET) {
6075 6076 6077 6078
				match = 1;
				break;
			}
		}
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James Smart committed
6079
		spin_unlock_irq(shost->host_lock);
6080 6081
		if (!match)
			continue;
6082

6083
		status = lpfc_send_taskmgmt(vport, cmnd,
6084 6085 6086
					i, 0, FCP_TARGET_RESET);

		if (status != SUCCESS) {
6087
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6088 6089
					 "0700 Bus Reset on target %d failed\n",
					 i);
6090
			ret = FAILED;
6091 6092
		}
	}
6093
	/*
6094 6095 6096 6097
	 * 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.
6098
	 */
6099 6100 6101

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
6102
		ret = FAILED;
6103 6104
	if (ret == FAILED)
		logit =  LOG_TRACE_EVENT;
6105

6106
	lpfc_printf_vlog(vport, KERN_ERR, logit,
6107
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
6108 6109 6110
	return ret;
}

6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134
/**
 * 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;

6135
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
6136 6137
			 "3172 SCSI layer issued Host Reset Data:\n");

6138
	lpfc_offline_prep(phba, LPFC_MBX_WAIT);
6139 6140 6141
	lpfc_offline(phba);
	rc = lpfc_sli_brdrestart(phba);
	if (rc)
6142 6143
		goto error;

6144 6145
	rc = lpfc_online(phba);
	if (rc)
6146 6147
		goto error;

6148 6149 6150
	lpfc_unblock_mgmt_io(phba);

	return ret;
6151
error:
6152
	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6153 6154 6155
			 "3323 Failed host reset\n");
	lpfc_unblock_mgmt_io(phba);
	return FAILED;
6156 6157
}

6158
/**
6159
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170
 * @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
 **/
6171 6172 6173
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
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6174 6175
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
6176
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
6177
	uint32_t total = 0;
6178
	uint32_t num_to_alloc = 0;
6179
	int num_allocated = 0;
6180
	uint32_t sdev_cnt;
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	struct lpfc_device_data *device_data;
	unsigned long flags;
	struct lpfc_name target_wwpn;
6184

6185
	if (!rport || fc_remote_port_chkready(rport))
6186 6187
		return -ENXIO;

6188
	if (phba->cfg_fof) {
6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206

		/*
		 * Check to see if the device data structure for the lun
		 * exists.  If not, create one.
		 */

		u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
		spin_lock_irqsave(&phba->devicelock, flags);
		device_data = __lpfc_get_device_data(phba,
						     &phba->luns,
						     &vport->fc_portname,
						     &target_wwpn,
						     sdev->lun);
		if (!device_data) {
			spin_unlock_irqrestore(&phba->devicelock, flags);
			device_data = lpfc_create_device_data(phba,
							&vport->fc_portname,
							&target_wwpn,
6207 6208 6209
							sdev->lun,
							phba->cfg_XLanePriority,
							true);
6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221
			if (!device_data)
				return -ENOMEM;
			spin_lock_irqsave(&phba->devicelock, flags);
			list_add_tail(&device_data->listentry, &phba->luns);
		}
		device_data->rport_data = rport->dd_data;
		device_data->available = true;
		spin_unlock_irqrestore(&phba->devicelock, flags);
		sdev->hostdata = device_data;
	} else {
		sdev->hostdata = rport->dd_data;
	}
6222
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
6223

6224 6225 6226 6227 6228 6229
	/* For SLI4, all IO buffers are pre-allocated */
	if (phba->sli_rev == LPFC_SLI_REV4)
		return 0;

	/* This code path is now ONLY for SLI3 adapters */

6230 6231 6232
	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
6233 6234 6235
	 * 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.
6236 6237
	 */
	total = phba->total_scsi_bufs;
6238
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
6239

6240 6241 6242 6243
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

6244 6245
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
6246 6247 6248
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
6249
		return 0;
6250 6251 6252
	/* 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 ) {
6253 6254 6255 6256 6257 6258
		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));
6259 6260
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
6261
	num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc);
6262
	if (num_to_alloc != num_allocated) {
6263
			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
6264 6265 6266 6267
					 "0708 Allocation request of %d "
					 "command buffers did not succeed.  "
					 "Allocated %d buffers.\n",
					 num_to_alloc, num_allocated);
6268
	}
6269 6270
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
6271 6272 6273
	return 0;
}

6274
/**
6275
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
6276 6277 6278 6279 6280 6281 6282 6283 6284
 * @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
 **/
6285 6286 6287
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
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6288 6289
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
6290

6291
	scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
6292

6293
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
6294
		lpfc_sli_handle_fast_ring_event(phba,
6295
			&phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
6296 6297 6298 6299
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

6300 6301 6302
	return 0;
}

6303
/**
6304
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
6305 6306 6307 6308
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
6309 6310 6311
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
6312 6313
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
6314 6315 6316
	unsigned long flags;
	struct lpfc_device_data *device_data = sdev->hostdata;

6317
	atomic_dec(&phba->sdev_cnt);
6318
	if ((phba->cfg_fof) && (device_data)) {
6319 6320 6321 6322 6323 6324
		spin_lock_irqsave(&phba->devicelock, flags);
		device_data->available = false;
		if (!device_data->oas_enabled)
			lpfc_delete_device_data(phba, device_data);
		spin_unlock_irqrestore(&phba->devicelock, flags);
	}
6325 6326 6327 6328
	sdev->hostdata = NULL;
	return;
}

6329 6330
/**
 * lpfc_create_device_data - creates and initializes device data structure for OAS
6331
 * @phba: Pointer to host bus adapter structure.
6332 6333 6334
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun on target
6335
 * @pri: Priority
6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350
 * @atomic_create: Flag to indicate if memory should be allocated using the
 *		  GFP_ATOMIC flag or not.
 *
 * This routine creates a device data structure which will contain identifying
 * information for the device (host wwpn, target wwpn, lun), state of OAS,
 * whether or not the corresponding lun is available by the system,
 * and pointer to the rport data.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_device_data - Success
 **/
struct lpfc_device_data*
lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
			struct lpfc_name *target_wwpn, uint64_t lun,
6351
			uint32_t pri, bool atomic_create)
6352 6353 6354 6355 6356 6357
{

	struct lpfc_device_data *lun_info;
	int memory_flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
6358
	    !(phba->cfg_fof))
6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377
		return NULL;

	/* Attempt to create the device data to contain lun info */

	if (atomic_create)
		memory_flags = GFP_ATOMIC;
	else
		memory_flags = GFP_KERNEL;
	lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
	if (!lun_info)
		return NULL;
	INIT_LIST_HEAD(&lun_info->listentry);
	lun_info->rport_data  = NULL;
	memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
	       sizeof(struct lpfc_name));
	memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
	       sizeof(struct lpfc_name));
	lun_info->device_id.lun = lun;
	lun_info->oas_enabled = false;
6378
	lun_info->priority = pri;
6379 6380 6381 6382 6383 6384
	lun_info->available = false;
	return lun_info;
}

/**
 * lpfc_delete_device_data - frees a device data structure for OAS
6385
 * @phba: Pointer to host bus adapter structure.
6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396
 * @lun_info: Pointer to device data structure to free.
 *
 * This routine frees the previously allocated device data structure passed.
 *
 **/
void
lpfc_delete_device_data(struct lpfc_hba *phba,
			struct lpfc_device_data *lun_info)
{

	if (unlikely(!phba) || !lun_info  ||
6397
	    !(phba->cfg_fof))
6398 6399 6400 6401 6402 6403 6404 6405 6406 6407
		return;

	if (!list_empty(&lun_info->listentry))
		list_del(&lun_info->listentry);
	mempool_free(lun_info, phba->device_data_mem_pool);
	return;
}

/**
 * __lpfc_get_device_data - returns the device data for the specified lun
6408
 * @phba: Pointer to host bus adapter structure.
6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430
 * @list: Point to list to search.
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun on target
 *
 * This routine searches the list passed for the specified lun's device data.
 * This function does not hold locks, it is the responsibility of the caller
 * to ensure the proper lock is held before calling the function.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_device_data - Success
 **/
struct lpfc_device_data*
__lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
		       struct lpfc_name *vport_wwpn,
		       struct lpfc_name *target_wwpn, uint64_t lun)
{

	struct lpfc_device_data *lun_info;

	if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
6431
	    !phba->cfg_fof)
6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449
		return NULL;

	/* Check to see if the lun is already enabled for OAS. */

	list_for_each_entry(lun_info, list, listentry) {
		if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
			    sizeof(struct lpfc_name)) == 0) &&
		    (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
			    sizeof(struct lpfc_name)) == 0) &&
		    (lun_info->device_id.lun == lun))
			return lun_info;
	}

	return NULL;
}

/**
 * lpfc_find_next_oas_lun - searches for the next oas lun
6450
 * @phba: Pointer to host bus adapter structure.
6451 6452 6453 6454 6455 6456 6457
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @starting_lun: Pointer to the lun to start searching for
 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
 * @found_target_wwpn: Pointer to the found lun's target wwpn information
 * @found_lun: Pointer to the found lun.
 * @found_lun_status: Pointer to status of the found lun.
6458
 * @found_lun_pri: Pointer to priority of the found lun.
6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480
 *
 * This routine searches the luns list for the specified lun
 * or the first lun for the vport/target.  If the vport wwpn contains
 * a zero value then a specific vport is not specified. In this case
 * any vport which contains the lun will be considered a match.  If the
 * target wwpn contains a zero value then a specific target is not specified.
 * In this case any target which contains the lun will be considered a
 * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
 * are returned.  The function will also return the next lun if available.
 * If the next lun is not found, starting_lun parameter will be set to
 * NO_MORE_OAS_LUN.
 *
 * Return codes:
 *   non-0 - Error
 *   0 - Success
 **/
bool
lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
		       struct lpfc_name *target_wwpn, uint64_t *starting_lun,
		       struct lpfc_name *found_vport_wwpn,
		       struct lpfc_name *found_target_wwpn,
		       uint64_t *found_lun,
6481 6482
		       uint32_t *found_lun_status,
		       uint32_t *found_lun_pri)
6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494
{

	unsigned long flags;
	struct lpfc_device_data *lun_info;
	struct lpfc_device_id *device_id;
	uint64_t lun;
	bool found = false;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
	    !starting_lun || !found_vport_wwpn ||
	    !found_target_wwpn || !found_lun || !found_lun_status ||
	    (*starting_lun == NO_MORE_OAS_LUN) ||
6495
	    !phba->cfg_fof)
6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528
		return false;

	lun = *starting_lun;
	*found_lun = NO_MORE_OAS_LUN;
	*starting_lun = NO_MORE_OAS_LUN;

	/* Search for lun or the lun closet in value */

	spin_lock_irqsave(&phba->devicelock, flags);
	list_for_each_entry(lun_info, &phba->luns, listentry) {
		if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
		     (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
			    sizeof(struct lpfc_name)) == 0)) &&
		    ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
		     (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
			    sizeof(struct lpfc_name)) == 0)) &&
		    (lun_info->oas_enabled)) {
			device_id = &lun_info->device_id;
			if ((!found) &&
			    ((lun == FIND_FIRST_OAS_LUN) ||
			     (device_id->lun == lun))) {
				*found_lun = device_id->lun;
				memcpy(found_vport_wwpn,
				       &device_id->vport_wwpn,
				       sizeof(struct lpfc_name));
				memcpy(found_target_wwpn,
				       &device_id->target_wwpn,
				       sizeof(struct lpfc_name));
				if (lun_info->available)
					*found_lun_status =
						OAS_LUN_STATUS_EXISTS;
				else
					*found_lun_status = 0;
6529
				*found_lun_pri = lun_info->priority;
6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552
				if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
					memset(vport_wwpn, 0x0,
					       sizeof(struct lpfc_name));
				if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
					memset(target_wwpn, 0x0,
					       sizeof(struct lpfc_name));
				found = true;
			} else if (found) {
				*starting_lun = device_id->lun;
				memcpy(vport_wwpn, &device_id->vport_wwpn,
				       sizeof(struct lpfc_name));
				memcpy(target_wwpn, &device_id->target_wwpn,
				       sizeof(struct lpfc_name));
				break;
			}
		}
	}
	spin_unlock_irqrestore(&phba->devicelock, flags);
	return found;
}

/**
 * lpfc_enable_oas_lun - enables a lun for OAS operations
6553
 * @phba: Pointer to host bus adapter structure.
6554 6555 6556
 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun
6557
 * @pri: Priority
6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573
 *
 * This routine enables a lun for oas operations.  The routines does so by
 * doing the following :
 *
 *   1) Checks to see if the device data for the lun has been created.
 *   2) If found, sets the OAS enabled flag if not set and returns.
 *   3) Otherwise, creates a device data structure.
 *   4) If successfully created, indicates the device data is for an OAS lun,
 *   indicates the lun is not available and add to the list of luns.
 *
 * Return codes:
 *   false - Error
 *   true - Success
 **/
bool
lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
6574
		    struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
6575 6576 6577 6578 6579 6580
{

	struct lpfc_device_data *lun_info;
	unsigned long flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
6581
	    !phba->cfg_fof)
6582 6583 6584 6585 6586 6587 6588 6589 6590 6591
		return false;

	spin_lock_irqsave(&phba->devicelock, flags);

	/* Check to see if the device data for the lun has been created */
	lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
					  target_wwpn, lun);
	if (lun_info) {
		if (!lun_info->oas_enabled)
			lun_info->oas_enabled = true;
6592
		lun_info->priority = pri;
6593 6594 6595 6596 6597 6598
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}

	/* Create an lun info structure and add to list of luns */
	lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
6599
					   pri, true);
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	if (lun_info) {
		lun_info->oas_enabled = true;
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		lun_info->priority = pri;
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		lun_info->available = false;
		list_add_tail(&lun_info->listentry, &phba->luns);
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}
	spin_unlock_irqrestore(&phba->devicelock, flags);
	return false;
}

/**
 * lpfc_disable_oas_lun - disables a lun for OAS operations
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 * @phba: Pointer to host bus adapter structure.
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 * @vport_wwpn: Pointer to vport's wwpn information
 * @target_wwpn: Pointer to target's wwpn information
 * @lun: Lun
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 * @pri: Priority
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 *
 * This routine disables a lun for oas operations.  The routines does so by
 * doing the following :
 *
 *   1) Checks to see if the device data for the lun is created.
 *   2) If present, clears the flag indicating this lun is for OAS.
 *   3) If the lun is not available by the system, the device data is
 *   freed.
 *
 * Return codes:
 *   false - Error
 *   true - Success
 **/
bool
lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
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		     struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
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{

	struct lpfc_device_data *lun_info;
	unsigned long flags;

	if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
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	    !phba->cfg_fof)
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		return false;

	spin_lock_irqsave(&phba->devicelock, flags);

	/* Check to see if the lun is available. */
	lun_info = __lpfc_get_device_data(phba,
					  &phba->luns, vport_wwpn,
					  target_wwpn, lun);
	if (lun_info) {
		lun_info->oas_enabled = false;
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		lun_info->priority = pri;
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		if (!lun_info->available)
			lpfc_delete_device_data(phba, lun_info);
		spin_unlock_irqrestore(&phba->devicelock, flags);
		return true;
	}

	spin_unlock_irqrestore(&phba->devicelock, flags);
	return false;
}
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static int
lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
{
	return SCSI_MLQUEUE_HOST_BUSY;
}

static int
lpfc_no_handler(struct scsi_cmnd *cmnd)
{
	return FAILED;
}

static int
lpfc_no_slave(struct scsi_device *sdev)
{
	return -ENODEV;
}

struct scsi_host_template lpfc_template_nvme = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.proc_name		= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_no_command,
	.eh_abort_handler	= lpfc_no_handler,
	.eh_device_reset_handler = lpfc_no_handler,
	.eh_target_reset_handler = lpfc_no_handler,
	.eh_bus_reset_handler	= lpfc_no_handler,
	.eh_host_reset_handler  = lpfc_no_handler,
	.slave_alloc		= lpfc_no_slave,
	.slave_configure	= lpfc_no_slave,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
	.sg_tablesize		= 1,
	.cmd_per_lun		= 1,
	.shost_attrs		= lpfc_hba_attrs,
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	.max_sectors		= 0xFFFFFFFF,
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	.vendor_id		= LPFC_NL_VENDOR_ID,
	.track_queue_depth	= 0,
};

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struct scsi_host_template lpfc_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
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	.proc_name		= LPFC_DRIVER_NAME,
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	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
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	.eh_timed_out		= fc_eh_timed_out,
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	.eh_should_retry_cmd    = fc_eh_should_retry_cmd,
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	.eh_abort_handler	= lpfc_abort_handler,
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	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
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	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
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	.eh_host_reset_handler  = lpfc_host_reset_handler,
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	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
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	.scan_finished		= lpfc_scan_finished,
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	.this_id		= -1,
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	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
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	.cmd_per_lun		= LPFC_CMD_PER_LUN,
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	.shost_attrs		= lpfc_hba_attrs,
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	.max_sectors		= 0xFFFFFFFF,
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	.vendor_id		= LPFC_NL_VENDOR_ID,
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	.change_queue_depth	= scsi_change_queue_depth,
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	.track_queue_depth	= 1,
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};