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linux-next/drivers/scsi/lpfc/lpfc_scsi.c
Mike Christie 3496343df5 [SCSI] lpfc: block target when port queueing limit is hit 
Instead of blocking the entire host when the port's
queueing limit is hit, we should only block the port's
target. This will allow IO to other ports to execute.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: James Smart  <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-02-28 11:21:53 -06:00

3898 lines
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2009 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* 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. *
*******************************************************************/
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>
#include "lpfc_version.h"
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#define LPFC_RESET_WAIT 2
#define LPFC_ABORT_WAIT 2
int _dump_buf_done;
static char *dif_op_str[] = {
"SCSI_PROT_NORMAL",
"SCSI_PROT_READ_INSERT",
"SCSI_PROT_WRITE_STRIP",
"SCSI_PROT_READ_STRIP",
"SCSI_PROT_WRITE_INSERT",
"SCSI_PROT_READ_PASS",
"SCSI_PROT_WRITE_PASS",
};
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
static void
lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
{
void *src, *dst;
struct scatterlist *sgde = scsi_sglist(cmnd);
if (!_dump_buf_data) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
__func__);
return;
}
if (!sgde) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9051 BLKGRD: ERROR: data scatterlist is null\n");
return;
}
dst = (void *) _dump_buf_data;
while (sgde) {
src = sg_virt(sgde);
memcpy(dst, src, sgde->length);
dst += sgde->length;
sgde = sg_next(sgde);
}
}
static void
lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
{
void *src, *dst;
struct scatterlist *sgde = scsi_prot_sglist(cmnd);
if (!_dump_buf_dif) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
__func__);
return;
}
if (!sgde) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9053 BLKGRD: ERROR: prot scatterlist is null\n");
return;
}
dst = _dump_buf_dif;
while (sgde) {
src = sg_virt(sgde);
memcpy(dst, src, sgde->length);
dst += sgde->length;
sgde = sg_next(sgde);
}
}
/**
* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
* @phba: Pointer to HBA object.
* @lpfc_cmd: lpfc scsi command object pointer.
*
* This function is called from the lpfc_prep_task_mgmt_cmd function to
* set the last bit in the response sge entry.
**/
static void
lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
struct lpfc_scsi_buf *lpfc_cmd)
{
struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
if (sgl) {
sgl += 1;
sgl->word2 = le32_to_cpu(sgl->word2);
bf_set(lpfc_sli4_sge_last, sgl, 1);
sgl->word2 = cpu_to_le32(sgl->word2);
}
}
/**
* lpfc_update_stats - Update statistical data for the command completion
* @phba: Pointer to HBA object.
* @lpfc_cmd: lpfc scsi command object pointer.
*
* This function is called when there is a command completion and this
* function updates the statistical data for the command completion.
**/
static void
lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *pnode = rdata->pnode;
struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
unsigned long flags;
struct Scsi_Host *shost = cmd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
unsigned long latency;
int i;
if (cmd->result)
return;
latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
spin_lock_irqsave(shost->host_lock, flags);
if (!vport->stat_data_enabled ||
vport->stat_data_blocked ||
!pnode ||
!pnode->lat_data ||
(phba->bucket_type == LPFC_NO_BUCKET)) {
spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
phba->bucket_step;
/* check array subscript bounds */
if (i < 0)
i = 0;
else if (i >= LPFC_MAX_BUCKET_COUNT)
i = LPFC_MAX_BUCKET_COUNT - 1;
} 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);
}
/**
* lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
* @phba: Pointer to HBA context object.
* @vport: Pointer to vport object.
* @ndlp: Pointer to FC node associated with the target.
* @lun: Lun number of the scsi device.
* @old_val: Old value of the queue depth.
* @new_val: New value of the queue depth.
*
* This function sends an event to the mgmt application indicating
* there is a change in the scsi device queue depth.
**/
static void
lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
struct lpfc_vport *vport,
struct lpfc_nodelist *ndlp,
uint32_t lun,
uint32_t old_val,
uint32_t new_val)
{
struct lpfc_fast_path_event *fast_path_evt;
unsigned long flags;
fast_path_evt = lpfc_alloc_fast_evt(phba);
if (!fast_path_evt)
return;
fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
FC_REG_SCSI_EVENT;
fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
LPFC_EVENT_VARQUEDEPTH;
/* Report all luns with change in queue depth */
fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
&ndlp->nlp_portname, sizeof(struct lpfc_name));
memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
&ndlp->nlp_nodename, sizeof(struct lpfc_name));
}
fast_path_evt->un.queue_depth_evt.oldval = old_val;
fast_path_evt->un.queue_depth_evt.newval = new_val;
fast_path_evt->vport = vport;
fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
spin_lock_irqsave(&phba->hbalock, flags);
list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_worker_wake_up(phba);
return;
}
/**
* lpfc_change_queue_depth - Alter scsi device queue depth
* @sdev: Pointer the scsi device on which to change the queue depth.
* @qdepth: New queue depth to set the sdev to.
* @reason: The reason for the queue depth change.
*
* This function is called by the midlayer and the LLD to alter the queue
* depth for a scsi device. This function sets the queue depth to the new
* value and sends an event out to log the queue depth change.
**/
int
lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_rport_data *rdata;
unsigned long new_queue_depth, old_queue_depth;
old_queue_depth = sdev->queue_depth;
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
new_queue_depth = sdev->queue_depth;
rdata = sdev->hostdata;
if (rdata)
lpfc_send_sdev_queuedepth_change_event(phba, vport,
rdata->pnode, sdev->lun,
old_queue_depth,
new_queue_depth);
return sdev->queue_depth;
}
/**
* lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
* @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.
**/
void
lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
{
unsigned long flags;
uint32_t evt_posted;
spin_lock_irqsave(&phba->hbalock, flags);
atomic_inc(&phba->num_rsrc_err);
phba->last_rsrc_error_time = jiffies;
if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
phba->last_ramp_down_time = jiffies;
spin_unlock_irqrestore(&phba->hbalock, flags);
spin_lock_irqsave(&phba->pport->work_port_lock, flags);
evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
if (!evt_posted)
phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
if (!evt_posted)
lpfc_worker_wake_up(phba);
return;
}
/**
* lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
* @phba: The Hba for which this call is being executed.
*
* This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
* post at most 1 event every 5 minute after last_ramp_up_time or
* last_rsrc_error_time. This routine wakes up worker thread of @phba
* to process WORKER_RAM_DOWN_EVENT event.
*
* This routine should be called with no lock held.
**/
static inline void
lpfc_rampup_queue_depth(struct lpfc_vport *vport,
uint32_t queue_depth)
{
unsigned long flags;
struct lpfc_hba *phba = vport->phba;
uint32_t evt_posted;
atomic_inc(&phba->num_cmd_success);
if (vport->cfg_lun_queue_depth <= queue_depth)
return;
spin_lock_irqsave(&phba->hbalock, flags);
if (time_before(jiffies,
phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
time_before(jiffies,
phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
phba->last_ramp_up_time = jiffies;
spin_unlock_irqrestore(&phba->hbalock, flags);
spin_lock_irqsave(&phba->pport->work_port_lock, flags);
evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
if (!evt_posted)
phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
if (!evt_posted)
lpfc_worker_wake_up(phba);
return;
}
/**
* lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
* @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.
**/
void
lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
{
struct lpfc_vport **vports;
struct Scsi_Host *shost;
struct scsi_device *sdev;
unsigned long new_queue_depth;
unsigned long num_rsrc_err, num_cmd_success;
int i;
num_rsrc_err = atomic_read(&phba->num_rsrc_err);
num_cmd_success = atomic_read(&phba->num_cmd_success);
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
shost = lpfc_shost_from_vport(vports[i]);
shost_for_each_device(sdev, shost) {
new_queue_depth =
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;
lpfc_change_queue_depth(sdev, new_queue_depth,
SCSI_QDEPTH_DEFAULT);
}
}
lpfc_destroy_vport_work_array(phba, vports);
atomic_set(&phba->num_rsrc_err, 0);
atomic_set(&phba->num_cmd_success, 0);
}
/**
* lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
* @phba: The Hba for which this call is being executed.
*
* This routine is called to process WORKER_RAMP_UP_QUEUE event for worker
* thread.This routine increases queue depth for all scsi device on each vport
* associated with @phba by 1. This routine also sets @phba num_rsrc_err and
* num_cmd_success to zero.
**/
void
lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
{
struct lpfc_vport **vports;
struct Scsi_Host *shost;
struct scsi_device *sdev;
int i;
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
shost = lpfc_shost_from_vport(vports[i]);
shost_for_each_device(sdev, shost) {
if (vports[i]->cfg_lun_queue_depth <=
sdev->queue_depth)
continue;
lpfc_change_queue_depth(sdev,
sdev->queue_depth+1,
SCSI_QDEPTH_RAMP_UP);
}
}
lpfc_destroy_vport_work_array(phba, vports);
atomic_set(&phba->num_rsrc_err, 0);
atomic_set(&phba->num_cmd_success, 0);
}
/**
* lpfc_scsi_dev_block - set all scsi hosts to block state
* @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)
for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
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);
}
/**
* lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
* @vport: The virtual port for which this call being executed.
* @num_to_allocate: The requested number of buffers to allocate.
*
* This routine allocates a scsi buffer for device with SLI-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.
*
* Return codes:
* int - number of scsi buffers that were allocated.
* 0 = failure, less than num_to_alloc is a partial failure.
**/
static int
lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *psb;
struct ulp_bde64 *bpl;
IOCB_t *iocb;
dma_addr_t pdma_phys_fcp_cmd;
dma_addr_t pdma_phys_fcp_rsp;
dma_addr_t pdma_phys_bpl;
uint16_t iotag;
int bcnt;
for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
if (!psb)
break;
/*
* Get memory from the pci pool to map the virt space to pci
* bus space for an I/O. The DMA buffer includes space for the
* struct fcp_cmnd, struct fcp_rsp and the number of bde's
* necessary to support the sg_tablesize.
*/
psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
GFP_KERNEL, &psb->dma_handle);
if (!psb->data) {
kfree(psb);
break;
}
/* Initialize virtual ptrs to dma_buf region. */
memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
/* Allocate iotag for psb->cur_iocbq. */
iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
if (iotag == 0) {
pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
psb->data, psb->dma_handle);
kfree(psb);
break;
}
psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
psb->fcp_cmnd = psb->data;
psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
sizeof(struct fcp_rsp);
/* Initialize local short-hand pointers. */
bpl = psb->fcp_bpl;
pdma_phys_fcp_cmd = psb->dma_handle;
pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
sizeof(struct fcp_rsp);
/*
* The first two bdes are the FCP_CMD and FCP_RSP. The balance
* are sg list bdes. Initialize the first two and leave the
* rest for queuecommand.
*/
bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
/* Setup the physical region for the FCP RSP */
bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
/*
* Since the IOCB for the FCP I/O is built into this
* lpfc_scsi_buf, initialize it with all known data now.
*/
iocb = &psb->cur_iocbq.iocb;
iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
if ((phba->sli_rev == 3) &&
!(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
/* fill in immediate fcp command BDE */
iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
unsli3.fcp_ext.icd);
iocb->un.fcpi64.bdl.addrHigh = 0;
iocb->ulpBdeCount = 0;
iocb->ulpLe = 0;
/* fill in responce BDE */
iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
BUFF_TYPE_BDE_64;
iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
sizeof(struct fcp_rsp);
iocb->unsli3.fcp_ext.rbde.addrLow =
putPaddrLow(pdma_phys_fcp_rsp);
iocb->unsli3.fcp_ext.rbde.addrHigh =
putPaddrHigh(pdma_phys_fcp_rsp);
} else {
iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
iocb->un.fcpi64.bdl.bdeSize =
(2 * sizeof(struct ulp_bde64));
iocb->un.fcpi64.bdl.addrLow =
putPaddrLow(pdma_phys_bpl);
iocb->un.fcpi64.bdl.addrHigh =
putPaddrHigh(pdma_phys_bpl);
iocb->ulpBdeCount = 1;
iocb->ulpLe = 1;
}
iocb->ulpClass = CLASS3;
psb->status = IOSTAT_SUCCESS;
/* Put it back into the SCSI buffer list */
psb->cur_iocbq.context1 = psb;
lpfc_release_scsi_buf_s3(phba, psb);
}
return bcnt;
}
/**
* lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
* @vport: pointer to lpfc vport data structure.
*
* This routine is invoked by the vport cleanup for deletions and the cleanup
* for an ndlp on removal.
**/
void
lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *psb, *next_psb;
unsigned long iflag = 0;
spin_lock_irqsave(&phba->hbalock, iflag);
spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
list_for_each_entry_safe(psb, next_psb,
&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
if (psb->rdata && psb->rdata->pnode
&& psb->rdata->pnode->vport == vport)
psb->rdata = NULL;
}
spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
spin_unlock_irqrestore(&phba->hbalock, iflag);
}
/**
* lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
* @phba: pointer to lpfc hba data structure.
* @axri: pointer to the fcp xri abort wcqe structure.
*
* This routine is invoked by the worker thread to process a SLI4 fast-path
* FCP aborted xri.
**/
void
lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
struct sli4_wcqe_xri_aborted *axri)
{
uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
struct lpfc_scsi_buf *psb, *next_psb;
unsigned long iflag = 0;
struct lpfc_iocbq *iocbq;
int i;
struct lpfc_nodelist *ndlp;
int rrq_empty = 0;
struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
spin_lock_irqsave(&phba->hbalock, iflag);
spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
list_for_each_entry_safe(psb, next_psb,
&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
if (psb->cur_iocbq.sli4_xritag == xri) {
list_del(&psb->list);
psb->exch_busy = 0;
psb->status = IOSTAT_SUCCESS;
spin_unlock(
&phba->sli4_hba.abts_scsi_buf_list_lock);
if (psb->rdata && psb->rdata->pnode)
ndlp = psb->rdata->pnode;
else
ndlp = NULL;
rrq_empty = list_empty(&phba->active_rrq_list);
spin_unlock_irqrestore(&phba->hbalock, iflag);
if (ndlp)
lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1);
lpfc_release_scsi_buf_s4(phba, psb);
if (rrq_empty)
lpfc_worker_wake_up(phba);
return;
}
}
spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
for (i = 1; i <= phba->sli.last_iotag; i++) {
iocbq = phba->sli.iocbq_lookup[i];
if (!(iocbq->iocb_flag & LPFC_IO_FCP) ||
(iocbq->iocb_flag & LPFC_IO_LIBDFC))
continue;
if (iocbq->sli4_xritag != xri)
continue;
psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
psb->exch_busy = 0;
spin_unlock_irqrestore(&phba->hbalock, iflag);
if (pring->txq_cnt)
lpfc_worker_wake_up(phba);
return;
}
spin_unlock_irqrestore(&phba->hbalock, iflag);
}
/**
* lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
* @phba: pointer to lpfc hba data structure.
*
* This routine walks the list of scsi buffers that have been allocated and
* repost them to the HBA by using SGL block post. This is needed after a
* pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
* is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
* to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
*
* Returns: 0 = success, non-zero failure.
**/
int
lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
{
struct lpfc_scsi_buf *psb;
int index, status, bcnt = 0, rcnt = 0, rc = 0;
LIST_HEAD(sblist);
for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
if (psb) {
/* Remove from SCSI buffer list */
list_del(&psb->list);
/* Add it to a local SCSI buffer list */
list_add_tail(&psb->list, &sblist);
if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
bcnt = rcnt;
rcnt = 0;
}
} else
/* A hole present in the XRI array, need to skip */
bcnt = rcnt;
if (index == phba->sli4_hba.scsi_xri_cnt - 1)
/* End of XRI array for SCSI buffer, complete */
bcnt = rcnt;
/* Continue until collect up to a nembed page worth of sgls */
if (bcnt == 0)
continue;
/* Now, post the SCSI buffer list sgls as a block */
status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
/* Reset SCSI buffer count for next round of posting */
bcnt = 0;
while (!list_empty(&sblist)) {
list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
list);
if (status) {
/* Put this back on the abort scsi list */
psb->exch_busy = 1;
rc++;
} else {
psb->exch_busy = 0;
psb->status = IOSTAT_SUCCESS;
}
/* Put it back into the SCSI buffer list */
lpfc_release_scsi_buf_s4(phba, psb);
}
}
return rc;
}
/**
* lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
* @vport: The virtual port for which this call being executed.
* @num_to_allocate: The requested number of buffers to allocate.
*
* This routine allocates a scsi buffer for device with SLI-4 interface spec,
* the scsi buffer contains all the necessary information needed to initiate
* a SCSI I/O.
*
* Return codes:
* int - number of scsi buffers that were allocated.
* 0 = failure, less than num_to_alloc is a partial failure.
**/
static int
lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *psb;
struct sli4_sge *sgl;
IOCB_t *iocb;
dma_addr_t pdma_phys_fcp_cmd;
dma_addr_t pdma_phys_fcp_rsp;
dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
uint16_t iotag, last_xritag = NO_XRI;
int status = 0, index;
int bcnt;
int non_sequential_xri = 0;
LIST_HEAD(sblist);
for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
if (!psb)
break;
/*
* Get memory from the pci pool to map the virt space to pci bus
* space for an I/O. The DMA buffer includes space for the
* struct fcp_cmnd, struct fcp_rsp and the number of bde's
* necessary to support the sg_tablesize.
*/
psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
GFP_KERNEL, &psb->dma_handle);
if (!psb->data) {
kfree(psb);
break;
}
/* Initialize virtual ptrs to dma_buf region. */
memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
/* Allocate iotag for psb->cur_iocbq. */
iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
if (iotag == 0) {
pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
psb->data, psb->dma_handle);
kfree(psb);
break;
}
psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
psb->data, psb->dma_handle);
kfree(psb);
break;
}
if (last_xritag != NO_XRI
&& psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
non_sequential_xri = 1;
} else
list_add_tail(&psb->list, &sblist);
last_xritag = psb->cur_iocbq.sli4_xritag;
index = phba->sli4_hba.scsi_xri_cnt++;
psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
psb->fcp_bpl = psb->data;
psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
- (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
sizeof(struct fcp_cmnd));
/* Initialize local short-hand pointers. */
sgl = (struct sli4_sge *)psb->fcp_bpl;
pdma_phys_bpl = psb->dma_handle;
pdma_phys_fcp_cmd =
(psb->dma_handle + phba->cfg_sg_dma_buf_size)
- (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
/*
* The first two bdes are the FCP_CMD and FCP_RSP. The balance
* are sg list bdes. Initialize the first two and leave the
* rest for queuecommand.
*/
sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
bf_set(lpfc_sli4_sge_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 */
sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
bf_set(lpfc_sli4_sge_last, sgl, 1);
sgl->word2 = cpu_to_le32(sgl->word2);
sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
/*
* Since the IOCB for the FCP I/O is built into this
* lpfc_scsi_buf, initialize it with all known data now.
*/
iocb = &psb->cur_iocbq.iocb;
iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
/* setting the BLP size to 2 * sizeof BDE may not be correct.
* We are setting the bpl to point to out sgl. An sgl's
* entries are 16 bytes, a bpl entries are 12 bytes.
*/
iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
iocb->ulpBdeCount = 1;
iocb->ulpLe = 1;
iocb->ulpClass = CLASS3;
psb->cur_iocbq.context1 = psb;
if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
else
pdma_phys_bpl1 = 0;
psb->dma_phys_bpl = pdma_phys_bpl;
phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
if (non_sequential_xri) {
status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
pdma_phys_bpl1,
psb->cur_iocbq.sli4_xritag);
if (status) {
/* Put this back on the abort scsi list */
psb->exch_busy = 1;
} else {
psb->exch_busy = 0;
psb->status = IOSTAT_SUCCESS;
}
/* Put it back into the SCSI buffer list */
lpfc_release_scsi_buf_s4(phba, psb);
break;
}
}
if (bcnt) {
status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
/* Reset SCSI buffer count for next round of posting */
while (!list_empty(&sblist)) {
list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
list);
if (status) {
/* Put this back on the abort scsi list */
psb->exch_busy = 1;
} else {
psb->exch_busy = 0;
psb->status = IOSTAT_SUCCESS;
}
/* Put it back into the SCSI buffer list */
lpfc_release_scsi_buf_s4(phba, psb);
}
}
return bcnt + non_sequential_xri;
}
/**
* lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
* @vport: The virtual port for which this call being executed.
* @num_to_allocate: The requested number of buffers to allocate.
*
* This routine wraps the actual SCSI buffer allocator function pointer from
* the lpfc_hba struct.
*
* Return codes:
* int - number of scsi buffers that were allocated.
* 0 = failure, less than num_to_alloc is a partial failure.
**/
static inline int
lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
{
return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
}
/**
* lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
* @phba: The HBA for which this call is being executed.
*
* This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
* and returns to caller.
*
* Return codes:
* NULL - Error
* Pointer to lpfc_scsi_buf - Success
**/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
struct lpfc_scsi_buf * lpfc_cmd = NULL;
struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
unsigned long iflag = 0;
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
if (lpfc_cmd) {
lpfc_cmd->seg_cnt = 0;
lpfc_cmd->nonsg_phys = 0;
lpfc_cmd->prot_seg_cnt = 0;
}
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
return lpfc_cmd;
}
/**
* lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
* @phba: The HBA for which this call is being executed.
*
* This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
* and returns to caller.
*
* Return codes:
* NULL - Error
* Pointer to lpfc_scsi_buf - Success
**/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
struct lpfc_scsi_buf *lpfc_cmd ;
unsigned long iflag = 0;
int found = 0;
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list,
list) {
if (lpfc_test_rrq_active(phba, ndlp,
lpfc_cmd->cur_iocbq.sli4_xritag))
continue;
list_del(&lpfc_cmd->list);
found = 1;
lpfc_cmd->seg_cnt = 0;
lpfc_cmd->nonsg_phys = 0;
lpfc_cmd->prot_seg_cnt = 0;
break;
}
spin_unlock_irqrestore(&phba->scsi_buf_list_lock,
iflag);
if (!found)
return NULL;
else
return lpfc_cmd;
}
/**
* lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
* @phba: The HBA for which this call is being executed.
*
* This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
* and returns to caller.
*
* Return codes:
* NULL - Error
* Pointer to lpfc_scsi_buf - Success
**/
static struct lpfc_scsi_buf*
lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
return phba->lpfc_get_scsi_buf(phba, ndlp);
}
/**
* lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
* @phba: The Hba for which this call is being executed.
* @psb: The scsi buffer which is being released.
*
* This routine releases @psb scsi buffer by adding it to tail of @phba
* lpfc_scsi_buf_list list.
**/
static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
unsigned long iflag = 0;
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
psb->pCmd = NULL;
list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
}
/**
* lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
* @phba: The Hba for which this call is being executed.
* @psb: The scsi buffer which is being released.
*
* This routine releases @psb scsi buffer by adding it to tail of @phba
* lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
* and cannot be reused for at least RA_TOV amount of time if it was
* aborted.
**/
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
unsigned long iflag = 0;
if (psb->exch_busy) {
spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
iflag);
psb->pCmd = NULL;
list_add_tail(&psb->list,
&phba->sli4_hba.lpfc_abts_scsi_buf_list);
spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
iflag);
} else {
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
psb->pCmd = NULL;
list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
}
}
/**
* lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
* @phba: The Hba for which this call is being executed.
* @psb: The scsi buffer which is being released.
*
* This routine releases @psb scsi buffer by adding it to tail of @phba
* lpfc_scsi_buf_list list.
**/
static void
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
phba->lpfc_release_scsi_buf(phba, psb);
}
/**
* lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
* @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-3 interface spec. This routine scans
* through sg elements and format the bdea. This routine also initializes all
* IOCB fields which are dependent on scsi command request buffer.
*
* Return codes:
* 1 - Error
* 0 - Success
**/
static int
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct scatterlist *sgel = NULL;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
dma_addr_t physaddr;
uint32_t num_bde = 0;
int nseg, datadir = scsi_cmnd->sc_data_direction;
/*
* 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;
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 = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
scsi_sg_count(scsi_cmnd), datadir);
if (unlikely(!nseg))
return 1;
lpfc_cmd->seg_cnt = nseg;
if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"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);
scsi_dma_unmap(scsi_cmnd);
return 1;
}
/*
* The driver established a maximum scatter-gather segment count
* during probe that limits the number of sg elements in any
* single scsi command. Just run through the seg_cnt and format
* the bde's.
* When using SLI-3 the driver will try to fit all the BDEs into
* the IOCB. If it can't then the BDEs get added to a BPL as it
* does for SLI-2 mode.
*/
scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
physaddr = sg_dma_address(sgel);
if (phba->sli_rev == 3 &&
!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
!(iocbq->iocb_flag & DSS_SECURITY_OP) &&
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++;
}
}
}
/*
* Finish initializing those IOCB fields that are dependent on the
* 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.
*/
if (phba->sli_rev == 3 &&
!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
!(iocbq->iocb_flag & DSS_SECURITY_OP)) {
if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
/*
* The extended IOCB format can only fit 3 BDE or a BPL.
* This I/O has more than 3 BDE so the 1st data bde will
* be a BPL that is filled in here.
*/
physaddr = lpfc_cmd->dma_handle;
data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
data_bde->tus.f.bdeSize = (num_bde *
sizeof(struct ulp_bde64));
physaddr += (sizeof(struct fcp_cmnd) +
sizeof(struct fcp_rsp) +
(2 * sizeof(struct ulp_bde64)));
data_bde->addrHigh = putPaddrHigh(physaddr);
data_bde->addrLow = putPaddrLow(physaddr);
/* ebde count includes the responce bde and data bpl */
iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
} else {
/* ebde count includes the responce bde and data bdes */
iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
}
} else {
iocb_cmd->un.fcpi64.bdl.bdeSize =
((num_bde + 2) * sizeof(struct ulp_bde64));
iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
}
fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
/*
* Due to difference in data length between DIF/non-DIF paths,
* we need to set word 4 of IOCB here
*/
iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
return 0;
}
/*
* Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
* @sc: The SCSI command to examine
* @txopt: (out) BlockGuard operation for transmitted data
* @rxopt: (out) BlockGuard operation for received data
*
* Returns: zero on success; non-zero if tx and/or rx op cannot be determined
*
*/
static int
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
uint8_t *txop, uint8_t *rxop)
{
uint8_t guard_type = scsi_host_get_guard(sc->device->host);
uint8_t ret = 0;
if (guard_type == SHOST_DIX_GUARD_IP) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
*txop = BG_OP_IN_CSUM_OUT_NODIF;
*rxop = BG_OP_IN_NODIF_OUT_CSUM;
break;
case SCSI_PROT_READ_STRIP:
case SCSI_PROT_WRITE_INSERT:
*txop = BG_OP_IN_NODIF_OUT_CRC;
*rxop = BG_OP_IN_CRC_OUT_NODIF;
break;
case SCSI_PROT_READ_PASS:
case SCSI_PROT_WRITE_PASS:
*txop = BG_OP_IN_CSUM_OUT_CRC;
*rxop = BG_OP_IN_CRC_OUT_CSUM;
break;
case SCSI_PROT_NORMAL:
default:
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9063 BLKGRD: Bad op/guard:%d/%d combination\n",
scsi_get_prot_op(sc), guard_type);
ret = 1;
break;
}
} else if (guard_type == SHOST_DIX_GUARD_CRC) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_STRIP:
case SCSI_PROT_WRITE_INSERT:
*txop = BG_OP_IN_NODIF_OUT_CRC;
*rxop = BG_OP_IN_CRC_OUT_NODIF;
break;
case SCSI_PROT_READ_PASS:
case SCSI_PROT_WRITE_PASS:
*txop = BG_OP_IN_CRC_OUT_CRC;
*rxop = BG_OP_IN_CRC_OUT_CRC;
break;
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
case SCSI_PROT_NORMAL:
default:
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9075 BLKGRD: Bad op/guard:%d/%d combination\n",
scsi_get_prot_op(sc), guard_type);
ret = 1;
break;
}
} else {
/* unsupported format */
BUG();
}
return ret;
}
struct scsi_dif_tuple {
__be16 guard_tag; /* Checksum */
__be16 app_tag; /* Opaque storage */
__be32 ref_tag; /* Target LBA or indirect LBA */
};
static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
return sc->device->sector_size;
}
/**
* lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
* @sc: in: SCSI command
* @apptagmask: out: app tag mask
* @apptagval: out: app tag value
* @reftag: out: ref tag (reference tag)
*
* Description:
* Extract DIF parameters from the command if possible. Otherwise,
* use default parameters.
*
**/
static inline void
lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
uint16_t *apptagval, uint32_t *reftag)
{
struct scsi_dif_tuple *spt;
unsigned char op = scsi_get_prot_op(sc);
unsigned int protcnt = scsi_prot_sg_count(sc);
static int cnt;
if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
op == SCSI_PROT_WRITE_PASS)) {
cnt++;
spt = page_address(sg_page(scsi_prot_sglist(sc))) +
scsi_prot_sglist(sc)[0].offset;
*apptagmask = 0;
*apptagval = 0;
*reftag = cpu_to_be32(spt->ref_tag);
} else {
/* SBC defines ref tag to be lower 32bits of LBA */
*reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
*apptagmask = 0;
*apptagval = 0;
}
}
/*
* This function sets up buffer list for protection groups of
* type LPFC_PG_TYPE_NO_DIF
*
* This is usually used when the HBA is instructed to generate
* DIFs and insert them into data stream (or strip DIF from
* incoming data stream)
*
* The buffer list consists of just one protection group described
* below:
* +-------------------------+
* start of prot group --> | PDE_5 |
* +-------------------------+
* | PDE_6 |
* +-------------------------+
* | Data BDE |
* +-------------------------+
* |more Data BDE's ... (opt)|
* +-------------------------+
*
* @sc: pointer to scsi command we're working on
* @bpl: pointer to buffer list for protection groups
* @datacnt: number of segments of data that have been dma mapped
*
* Note: Data s/g buffers have been dma mapped
*/
static int
lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
struct ulp_bde64 *bpl, int datasegcnt)
{
struct scatterlist *sgde = NULL; /* s/g data entry */
struct lpfc_pde5 *pde5 = NULL;
struct lpfc_pde6 *pde6 = NULL;
dma_addr_t physaddr;
int i = 0, num_bde = 0, status;
int datadir = sc->sc_data_direction;
unsigned blksize;
uint32_t reftag;
uint16_t apptagmask, apptagval;
uint8_t txop, rxop;
status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
if (status)
goto out;
/* extract some info from the scsi command for pde*/
blksize = lpfc_cmd_blksize(sc);
lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
/* 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);
pde5->reftag = reftag;
/* Endianness conversion if necessary for PDE5 */
pde5->word0 = cpu_to_le32(pde5->word0);
pde5->reftag = cpu_to_le32(pde5->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);
if (datadir == DMA_FROM_DEVICE) {
bf_set(pde6_ce, pde6, 1);
bf_set(pde6_re, pde6, 1);
bf_set(pde6_ae, pde6, 1);
}
bf_set(pde6_ai, pde6, 1);
bf_set(pde6_apptagval, pde6, apptagval);
/* 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++;
/* assumption: caller has already run dma_map_sg on command data */
scsi_for_each_sg(sc, sgde, datasegcnt, i) {
physaddr = sg_dma_address(sgde);
bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
bpl->tus.f.bdeSize = sg_dma_len(sgde);
if (datadir == DMA_TO_DEVICE)
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
else
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
bpl++;
num_bde++;
}
out:
return num_bde;
}
/*
* This function sets up buffer list for protection groups of
* type LPFC_PG_TYPE_DIF_BUF
*
* This is usually used when DIFs are in their own buffers,
* separate from the data. The HBA can then by instructed
* to place the DIFs in the outgoing stream. For read operations,
* The HBA could extract the DIFs and place it in DIF buffers.
*
* The buffer list for this type consists of one or more of the
* protection groups described below:
* +-------------------------+
* start of first prot group --> | PDE_5 |
* +-------------------------+
* | PDE_6 |
* +-------------------------+
* | PDE_7 (Prot BDE) |
* +-------------------------+
* | Data BDE |
* +-------------------------+
* |more Data BDE's ... (opt)|
* +-------------------------+
* start of new prot group --> | PDE_5 |
* +-------------------------+
* | ... |
* +-------------------------+
*
* @sc: pointer to scsi command we're working on
* @bpl: pointer to buffer list for protection groups
* @datacnt: number of segments of data that have been dma mapped
* @protcnt: number of segment of protection data that have been dma mapped
*
* Note: It is assumed that both data and protection s/g buffers have been
* mapped for DMA
*/
static int
lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
struct ulp_bde64 *bpl, int datacnt, int protcnt)
{
struct scatterlist *sgde = NULL; /* s/g data entry */
struct scatterlist *sgpe = NULL; /* s/g prot entry */
struct lpfc_pde5 *pde5 = NULL;
struct lpfc_pde6 *pde6 = NULL;
struct ulp_bde64 *prot_bde = NULL;
dma_addr_t dataphysaddr, protphysaddr;
unsigned short curr_data = 0, curr_prot = 0;
unsigned int split_offset, protgroup_len;
unsigned int protgrp_blks, protgrp_bytes;
unsigned int remainder, subtotal;
int status;
int datadir = sc->sc_data_direction;
unsigned char pgdone = 0, alldone = 0;
unsigned blksize;
uint32_t reftag;
uint16_t apptagmask, apptagval;
uint8_t txop, rxop;
int num_bde = 0;
sgpe = scsi_prot_sglist(sc);
sgde = scsi_sglist(sc);
if (!sgpe || !sgde) {
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
sgpe, sgde);
return 0;
}
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);
lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);
split_offset = 0;
do {
/* 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);
pde5->reftag = reftag;
/* Endianness conversion if necessary for PDE5 */
pde5->word0 = cpu_to_le32(pde5->word0);
pde5->reftag = cpu_to_le32(pde5->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);
bf_set(pde6_ce, pde6, 1);
bf_set(pde6_re, pde6, 1);
bf_set(pde6_ae, pde6, 1);
bf_set(pde6_ai, pde6, 1);
bf_set(pde6_apptagval, pde6, apptagval);
/* 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 */
prot_bde = (struct ulp_bde64 *) bpl;
protphysaddr = sg_dma_address(sgpe);
prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
protgroup_len = sg_dma_len(sgpe);
/* must be integer multiple of the DIF block length */
BUG_ON(protgroup_len % 8);
protgrp_blks = protgroup_len / 8;
protgrp_bytes = protgrp_blks * blksize;
prot_bde->tus.f.bdeSize = protgroup_len;
prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
prot_bde->tus.w = le32_to_cpu(bpl->tus.w);
curr_prot++;
num_bde++;
/* setup BDE's for data blocks associated with DIF data */
pgdone = 0;
subtotal = 0; /* total bytes processed for current prot grp */
while (!pgdone) {
if (!sgde) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9065 BLKGRD:%s Invalid data segment\n",
__func__);
return 0;
}
bpl++;
dataphysaddr = sg_dma_address(sgde) + split_offset;
bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
remainder = sg_dma_len(sgde) - split_offset;
if ((subtotal + remainder) <= protgrp_bytes) {
/* we can use this whole buffer */
bpl->tus.f.bdeSize = remainder;
split_offset = 0;
if ((subtotal + remainder) == protgrp_bytes)
pgdone = 1;
} else {
/* must split this buffer with next prot grp */
bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
split_offset += bpl->tus.f.bdeSize;
}
subtotal += bpl->tus.f.bdeSize;
if (datadir == DMA_TO_DEVICE)
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
else
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
num_bde++;
curr_data++;
if (split_offset)
break;
/* Move to the next s/g segment if possible */
sgde = sg_next(sgde);
}
/* are we done ? */
if (curr_prot == protcnt) {
alldone = 1;
} else if (curr_prot < protcnt) {
/* advance to next prot buffer */
sgpe = sg_next(sgpe);
bpl++;
/* update the reference tag */
reftag += protgrp_blks;
} else {
/* if we're here, we have a bug */
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9054 BLKGRD: bug in %s\n", __func__);
}
} while (!alldone);
out:
return num_bde;
}
/*
* Given a SCSI command that supports DIF, determine composition of protection
* groups involved in setting up buffer lists
*
* Returns:
* for DIF (for both read and write)
* */
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
{
int ret = LPFC_PG_TYPE_INVALID;
unsigned char op = scsi_get_prot_op(sc);
switch (op) {
case SCSI_PROT_READ_STRIP:
case SCSI_PROT_WRITE_INSERT:
ret = LPFC_PG_TYPE_NO_DIF;
break;
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
case SCSI_PROT_READ_PASS:
case SCSI_PROT_WRITE_PASS:
ret = LPFC_PG_TYPE_DIF_BUF;
break;
default:
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"9021 Unsupported protection op:%d\n", op);
break;
}
return ret;
}
/*
* This is the protection/DIF aware version of
* lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
* two functions eventually, but for now, it's here
*/
static int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
struct lpfc_scsi_buf *lpfc_cmd)
{
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
uint32_t num_bde = 0;
int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
int prot_group_type = 0;
int diflen, fcpdl;
unsigned blksize;
/*
* Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
* fcp_rsp regions to the first data bde entry
*/
bpl += 2;
if (scsi_sg_count(scsi_cmnd)) {
/*
* The driver stores the segment count returned from pci_map_sg
* because this a count of dma-mappings used to map the use_sg
* pages. They are not guaranteed to be the same for those
* architectures that implement an IOMMU.
*/
datasegcnt = dma_map_sg(&phba->pcidev->dev,
scsi_sglist(scsi_cmnd),
scsi_sg_count(scsi_cmnd), datadir);
if (unlikely(!datasegcnt))
return 1;
lpfc_cmd->seg_cnt = datasegcnt;
if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9067 BLKGRD: %s: Too many sg segments"
" from dma_map_sg. Config %d, seg_cnt"
" %d\n",
__func__, phba->cfg_sg_seg_cnt,
lpfc_cmd->seg_cnt);
scsi_dma_unmap(scsi_cmnd);
return 1;
}
prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
switch (prot_group_type) {
case LPFC_PG_TYPE_NO_DIF:
num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
datasegcnt);
/* we should have 2 or more entries in buffer list */
if (num_bde < 2)
goto err;
break;
case LPFC_PG_TYPE_DIF_BUF:{
/*
* This type indicates that protection buffers are
* passed to the driver, so that needs to be prepared
* for DMA
*/
protsegcnt = dma_map_sg(&phba->pcidev->dev,
scsi_prot_sglist(scsi_cmnd),
scsi_prot_sg_count(scsi_cmnd), datadir);
if (unlikely(!protsegcnt)) {
scsi_dma_unmap(scsi_cmnd);
return 1;
}
lpfc_cmd->prot_seg_cnt = protsegcnt;
if (lpfc_cmd->prot_seg_cnt
> phba->cfg_prot_sg_seg_cnt) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9068 BLKGRD: %s: Too many prot sg "
"segments from dma_map_sg. Config %d,"
"prot_seg_cnt %d\n", __func__,
phba->cfg_prot_sg_seg_cnt,
lpfc_cmd->prot_seg_cnt);
dma_unmap_sg(&phba->pcidev->dev,
scsi_prot_sglist(scsi_cmnd),
scsi_prot_sg_count(scsi_cmnd),
datadir);
scsi_dma_unmap(scsi_cmnd);
return 1;
}
num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
datasegcnt, protsegcnt);
/* we should have 3 or more entries in buffer list */
if (num_bde < 3)
goto err;
break;
}
case LPFC_PG_TYPE_INVALID:
default:
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"9022 Unexpected protection group %i\n",
prot_group_type);
return 1;
}
}
/*
* Finish initializing those IOCB fields that are dependent on the
* scsi_cmnd request_buffer. Note that the bdeSize is explicitly
* reinitialized since all iocb memory resources are used many times
* for transmit, receive, and continuation bpl's.
*/
iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
iocb_cmd->ulpBdeCount = 1;
iocb_cmd->ulpLe = 1;
fcpdl = scsi_bufflen(scsi_cmnd);
if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
/*
* We are in DIF Type 1 mode
* Every data block has a 8 byte DIF (trailer)
* attached to it. Must ajust FCP data length
*/
blksize = lpfc_cmd_blksize(scsi_cmnd);
diflen = (fcpdl / blksize) * 8;
fcpdl += diflen;
}
fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
/*
* Due to difference in data length between DIF/non-DIF paths,
* we need to set word 4 of IOCB here
*/
iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
return 0;
err:
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"9023 Could not setup all needed BDE's"
"prot_group_type=%d, num_bde=%d\n",
prot_group_type, num_bde);
return 1;
}
/*
* This function checks for BlockGuard errors detected by
* the HBA. In case of errors, the ASC/ASCQ fields in the
* sense buffer will be set accordingly, paired with
* ILLEGAL_REQUEST to signal to the kernel that the HBA
* detected corruption.
*
* Returns:
* 0 - No error found
* 1 - BlockGuard error found
* -1 - Internal error (bad profile, ...etc)
*/
static int
lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
struct lpfc_iocbq *pIocbOut)
{
struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
int ret = 0;
uint32_t bghm = bgf->bghm;
uint32_t bgstat = bgf->bgstat;
uint64_t failing_sector = 0;
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
" 0x%x lba 0x%llx blk cnt 0x%x "
"bgstat=0x%x bghm=0x%x\n",
cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
blk_rq_sectors(cmd->request), bgstat, bghm);
spin_lock(&_dump_buf_lock);
if (!_dump_buf_done) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving"
" Data for %u blocks to debugfs\n",
(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
lpfc_debug_save_data(phba, cmd);
/* If we have a prot sgl, save the DIF buffer */
if (lpfc_prot_group_type(phba, cmd) ==
LPFC_PG_TYPE_DIF_BUF) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
"Saving DIF for %u blocks to debugfs\n",
(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
lpfc_debug_save_dif(phba, cmd);
}
_dump_buf_done = 1;
}
spin_unlock(&_dump_buf_lock);
if (lpfc_bgs_get_invalid_prof(bgstat)) {
cmd->result = ScsiResult(DID_ERROR, 0);
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
" BlockGuard profile. bgstat:0x%x\n",
bgstat);
ret = (-1);
goto out;
}
if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
cmd->result = ScsiResult(DID_ERROR, 0);
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
"Invalid BlockGuard DIF Block. bgstat:0x%x\n",
bgstat);
ret = (-1);
goto out;
}
if (lpfc_bgs_get_guard_err(bgstat)) {
ret = 1;
scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
0x10, 0x1);
cmd->result = DRIVER_SENSE << 24
| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
phba->bg_guard_err_cnt++;
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9055 BLKGRD: guard_tag error\n");
}
if (lpfc_bgs_get_reftag_err(bgstat)) {
ret = 1;
scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
0x10, 0x3);
cmd->result = DRIVER_SENSE << 24
| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
phba->bg_reftag_err_cnt++;
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9056 BLKGRD: ref_tag error\n");
}
if (lpfc_bgs_get_apptag_err(bgstat)) {
ret = 1;
scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
0x10, 0x2);
cmd->result = DRIVER_SENSE << 24
| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
phba->bg_apptag_err_cnt++;
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9061 BLKGRD: app_tag error\n");
}
if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
/*
* setup sense data descriptor 0 per SPC-4 as an information
* field, and put the failing LBA in it
*/
cmd->sense_buffer[8] = 0; /* Information */
cmd->sense_buffer[9] = 0xa; /* Add. length */
bghm /= cmd->device->sector_size;
failing_sector = scsi_get_lba(cmd);
failing_sector += bghm;
put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
}
if (!ret) {
/* No error was reported - problem in FW? */
cmd->result = ScsiResult(DID_ERROR, 0);
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9057 BLKGRD: no errors reported!\n");
}
out:
return ret;
}
/**
* lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
* @phba: The Hba for which this call is being executed.
* @lpfc_cmd: The scsi buffer which is going to be mapped.
*
* This routine does the pci dma mapping for scatter-gather list of scsi cmnd
* field of @lpfc_cmd for device with SLI-4 interface spec.
*
* Return codes:
* 1 - Error
* 0 - Success
**/
static int
lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct scatterlist *sgel = NULL;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
struct sli4_sge *first_data_sgl;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
dma_addr_t physaddr;
uint32_t num_bde = 0;
uint32_t dma_len;
uint32_t dma_offset = 0;
int nseg;
struct ulp_bde64 *bde;
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither. Start the lpfc command prep by
* bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
* data bde entry.
*/
if (scsi_sg_count(scsi_cmnd)) {
/*
* The driver stores the segment count returned from pci_map_sg
* because this a count of dma-mappings used to map the use_sg
* pages. They are not guaranteed to be the same for those
* architectures that implement an IOMMU.
*/
nseg = scsi_dma_map(scsi_cmnd);
if (unlikely(!nseg))
return 1;
sgl += 1;
/* clear the last flag in the fcp_rsp map entry */
sgl->word2 = le32_to_cpu(sgl->word2);
bf_set(lpfc_sli4_sge_last, sgl, 0);
sgl->word2 = cpu_to_le32(sgl->word2);
sgl += 1;
first_data_sgl = sgl;
lpfc_cmd->seg_cnt = nseg;
if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
" %s: Too many sg segments from "
"dma_map_sg. Config %d, seg_cnt %d\n",
__func__, phba->cfg_sg_seg_cnt,
lpfc_cmd->seg_cnt);
scsi_dma_unmap(scsi_cmnd);
return 1;
}
/*
* The driver established a maximum scatter-gather segment count
* during probe that limits the number of sg elements in any
* single scsi command. Just run through the seg_cnt and format
* the sge's.
* When using SLI-3 the driver will try to fit all the BDEs into
* the IOCB. If it can't then the BDEs get added to a BPL as it
* does for SLI-2 mode.
*/
scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
physaddr = sg_dma_address(sgel);
dma_len = sg_dma_len(sgel);
sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
if ((num_bde + 1) == nseg)
bf_set(lpfc_sli4_sge_last, sgl, 1);
else
bf_set(lpfc_sli4_sge_last, sgl, 0);
bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
sgl->word2 = cpu_to_le32(sgl->word2);
sgl->sge_len = cpu_to_le32(dma_len);
dma_offset += dma_len;
sgl++;
}
/* setup the performance hint (first data BDE) if enabled */
if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
bde = (struct ulp_bde64 *)
&(iocb_cmd->unsli3.sli3Words[5]);
bde->addrLow = first_data_sgl->addr_lo;
bde->addrHigh = first_data_sgl->addr_hi;
bde->tus.f.bdeSize =
le32_to_cpu(first_data_sgl->sge_len);
bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bde->tus.w = cpu_to_le32(bde->tus.w);
}
} else {
sgl += 1;
/* clear the last flag in the fcp_rsp map entry */
sgl->word2 = le32_to_cpu(sgl->word2);
bf_set(lpfc_sli4_sge_last, sgl, 1);
sgl->word2 = cpu_to_le32(sgl->word2);
}
/*
* Finish initializing those IOCB fields that are dependent on the
* scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is
* explicitly reinitialized.
* all iocb memory resources are reused.
*/
fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
/*
* Due to difference in data length between DIF/non-DIF paths,
* we need to set word 4 of IOCB here
*/
iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
return 0;
}
/**
* lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
* @phba: The Hba for which this call is being executed.
* @lpfc_cmd: The scsi buffer which is going to be mapped.
*
* This routine wraps the actual DMA mapping function pointer from the
* lpfc_hba struct.
*
* Return codes:
* 1 - Error
* 0 - Success
**/
static inline int
lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
}
/**
* lpfc_send_scsi_error_event - Posts an event when there is SCSI error
* @phba: Pointer to hba context object.
* @vport: Pointer to vport object.
* @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
* @rsp_iocb: Pointer to response iocb object which reported error.
*
* This function posts an event when there is a SCSI command reporting
* error from the scsi device.
**/
static void
lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
uint32_t resp_info = fcprsp->rspStatus2;
uint32_t scsi_status = fcprsp->rspStatus3;
uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
struct lpfc_fast_path_event *fast_path_evt = NULL;
struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
unsigned long flags;
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return;
/* 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;
}
/**
* lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
* @phba: The HBA for which this call is being executed.
* @psb: The scsi buffer which is going to be un-mapped.
*
* This routine does DMA un-mapping of scatter gather list of scsi command
* field of @lpfc_cmd for device with SLI-3 interface spec.
**/
static void
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
/*
* 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.
*/
if (psb->seg_cnt > 0)
scsi_dma_unmap(psb->pCmd);
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);
}
/**
* lpfc_handler_fcp_err - FCP response handler
* @vport: The virtual port for which this call is being executed.
* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
* @rsp_iocb: The response IOCB which contains FCP error.
*
* This routine is called to process response IOCB with status field
* IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
* based upon SCSI and FCP error.
**/
static void
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
struct lpfc_iocbq *rsp_iocb)
{
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 fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
uint32_t resp_info = fcprsp->rspStatus2;
uint32_t scsi_status = fcprsp->rspStatus3;
uint32_t *lp;
uint32_t host_status = DID_OK;
uint32_t rsplen = 0;
uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
/*
* 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;
}
if (resp_info & RSP_LEN_VALID) {
rsplen = be32_to_cpu(fcprsp->rspRspLen);
if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"2719 Invalid response length: "
"tgt x%x lun x%x cmnd x%x rsplen x%x\n",
cmnd->device->id,
cmnd->device->lun, cmnd->cmnd[0],
rsplen);
host_status = DID_ERROR;
goto out;
}
if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"2757 Protocol failure detected during "
"processing of FCP I/O op: "
"tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
cmnd->device->id,
cmnd->device->lun, cmnd->cmnd[0],
fcprsp->rspInfo3);
host_status = DID_ERROR;
goto out;
}
}
if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
if (snslen > SCSI_SENSE_BUFFERSIZE)
snslen = SCSI_SENSE_BUFFERSIZE;
if (resp_info & RSP_LEN_VALID)
rsplen = be32_to_cpu(fcprsp->rspRspLen);
memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
}
lp = (uint32_t *)cmnd->sense_buffer;
if (!scsi_status && (resp_info & RESID_UNDER))
logit = LOG_FCP;
lpfc_printf_vlog(vport, KERN_WARNING, logit,
"9024 FCP command x%x failed: x%x SNS x%x x%x "
"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);
scsi_set_resid(cmnd, 0);
if (resp_info & RESID_UNDER) {
scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"9025 FCP Read Underrun, expected %d, "
"residual %d Data: x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
cmnd->underflow);
/*
* If there is an under run check if under run reported by
* storage array is same as the under run reported by HBA.
* If this is not same, there is a dropped frame.
*/
if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
fcpi_parm &&
(scsi_get_resid(cmnd) != fcpi_parm)) {
lpfc_printf_vlog(vport, KERN_WARNING,
LOG_FCP | LOG_FCP_ERROR,
"9026 FCP Read Check Error "
"and Underrun Data: x%x x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
scsi_get_resid(cmnd), fcpi_parm,
cmnd->cmnd[0]);
scsi_set_resid(cmnd, scsi_bufflen(cmnd));
host_status = DID_ERROR;
}
/*
* The cmnd->underflow is the minimum number of bytes that must
* be transfered for this command. Provided a sense condition
* is not present, make sure the actual amount transferred is at
* least the underflow value or fail.
*/
if (!(resp_info & SNS_LEN_VALID) &&
(scsi_status == SAM_STAT_GOOD) &&
(scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
< cmnd->underflow)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"9027 FCP command x%x residual "
"underrun converted to error "
"Data: x%x x%x x%x\n",
cmnd->cmnd[0], scsi_bufflen(cmnd),
scsi_get_resid(cmnd), cmnd->underflow);
host_status = DID_ERROR;
}
} else if (resp_info & RESID_OVER) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"9028 FCP command x%x residual overrun error. "
"Data: x%x x%x\n", cmnd->cmnd[0],
scsi_bufflen(cmnd), scsi_get_resid(cmnd));
host_status = DID_ERROR;
/*
* Check SLI validation that all the transfer was actually done
* (fcpi_parm should be zero). Apply check only to reads.
*/
} else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
"9029 FCP Read Check Error Data: "
"x%x x%x x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
be32_to_cpu(fcprsp->rspResId),
fcpi_parm, cmnd->cmnd[0], scsi_status);
switch (scsi_status) {
case SAM_STAT_GOOD:
case SAM_STAT_CHECK_CONDITION:
/* Fabric dropped a data frame. Fail any successful
* command in which we detected dropped frames.
* A status of good or some check conditions could
* be considered a successful command.
*/
host_status = DID_ERROR;
break;
}
scsi_set_resid(cmnd, scsi_bufflen(cmnd));
}
out:
cmnd->result = ScsiResult(host_status, scsi_status);
lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
}
/**
* lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
* @phba: The Hba for which this call is being executed.
* @pIocbIn: The command IOCBQ for the scsi cmnd.
* @pIocbOut: The response IOCBQ for the scsi cmnd.
*
* 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.
**/
static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
struct lpfc_iocbq *pIocbOut)
{
struct lpfc_scsi_buf *lpfc_cmd =
(struct lpfc_scsi_buf *) pIocbIn->context1;
struct lpfc_vport *vport = pIocbIn->vport;
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *pnode = rdata->pnode;
struct scsi_cmnd *cmd;
int result;
struct scsi_device *tmp_sdev;
int depth;
unsigned long flags;
struct lpfc_fast_path_event *fast_path_evt;
struct Scsi_Host *shost;
uint32_t queue_depth, scsi_id;
/* Sanity check on return of outstanding command */
if (!(lpfc_cmd->pCmd))
return;
cmd = lpfc_cmd->pCmd;
shost = cmd->device->host;
lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
/* pick up SLI4 exhange busy status from HBA */
lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
if (pnode && NLP_CHK_NODE_ACT(pnode))
atomic_dec(&pnode->cmd_pending);
if (lpfc_cmd->status) {
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
(lpfc_cmd->result & IOERR_DRVR_MASK))
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
else if (lpfc_cmd->status >= IOSTAT_CNT)
lpfc_cmd->status = IOSTAT_DEFAULT;
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"9030 FCP cmd x%x failed <%d/%d> "
"status: x%x result: x%x Data: x%x x%x\n",
cmd->cmnd[0],
cmd->device ? cmd->device->id : 0xffff,
cmd->device ? cmd->device->lun : 0xffff,
lpfc_cmd->status, lpfc_cmd->result,
pIocbOut->iocb.ulpContext,
lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
switch (lpfc_cmd->status) {
case IOSTAT_FCP_RSP_ERROR:
/* Call FCP RSP handler to determine result */
lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
break;
case IOSTAT_NPORT_BSY:
case IOSTAT_FABRIC_BSY:
cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
fast_path_evt = lpfc_alloc_fast_evt(phba);
if (!fast_path_evt)
break;
fast_path_evt->un.fabric_evt.event_type =
FC_REG_FABRIC_EVENT;
fast_path_evt->un.fabric_evt.subcategory =
(lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
if (pnode && NLP_CHK_NODE_ACT(pnode)) {
memcpy(&fast_path_evt->un.fabric_evt.wwpn,
&pnode->nlp_portname,
sizeof(struct lpfc_name));
memcpy(&fast_path_evt->un.fabric_evt.wwnn,
&pnode->nlp_nodename,
sizeof(struct lpfc_name));
}
fast_path_evt->vport = vport;
fast_path_evt->work_evt.evt =
LPFC_EVT_FASTPATH_MGMT_EVT;
spin_lock_irqsave(&phba->hbalock, flags);
list_add_tail(&fast_path_evt->work_evt.evt_listp,
&phba->work_list);
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_worker_wake_up(phba);
break;
case IOSTAT_LOCAL_REJECT:
case IOSTAT_REMOTE_STOP:
if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
lpfc_cmd->result ==
IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
lpfc_cmd->result ==
IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
cmd->result = ScsiResult(DID_NO_CONNECT, 0);
break;
}
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 = ScsiResult(DID_REQUEUE, 0);
break;
}
if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
/*
* This is a response for a BG enabled
* cmd. Parse BG error
*/
lpfc_parse_bg_err(phba, lpfc_cmd,
pIocbOut);
break;
} else {
lpfc_printf_vlog(vport, KERN_WARNING,
LOG_BG,
"9031 non-zero BGSTAT "
"on unprotected cmd\n");
}
}
if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
&& (phba->sli_rev == LPFC_SLI_REV4)
&& (pnode && NLP_CHK_NODE_ACT(pnode))) {
/* This IO was aborted by the target, we don't
* know the rxid and because we did not send the
* ABTS we cannot generate and RRQ.
*/
lpfc_set_rrq_active(phba, pnode,
lpfc_cmd->cur_iocbq.sli4_xritag,
0, 0);
}
/* else: fall through */
default:
cmd->result = ScsiResult(DID_ERROR, 0);
break;
}
if (!pnode || !NLP_CHK_NODE_ACT(pnode)
|| (pnode->nlp_state != NLP_STE_MAPPED_NODE))
cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
SAM_STAT_BUSY);
} else
cmd->result = ScsiResult(DID_OK, 0);
if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
uint32_t *lp = (uint32_t *)cmd->sense_buffer;
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0710 Iodone <%d/%d> cmd %p, error "
"x%x SNS x%x x%x Data: x%x x%x\n",
cmd->device->id, cmd->device->lun, cmd,
cmd->result, *lp, *(lp + 3), cmd->retries,
scsi_get_resid(cmd));
}
lpfc_update_stats(phba, lpfc_cmd);
result = cmd->result;
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 (pnode && NLP_CHK_NODE_ACT(pnode)) {
if (pnode->cmd_qdepth >
atomic_read(&pnode->cmd_pending) &&
(atomic_read(&pnode->cmd_pending) >
LPFC_MIN_TGT_QDEPTH) &&
((cmd->cmnd[0] == READ_10) ||
(cmd->cmnd[0] == WRITE_10)))
pnode->cmd_qdepth =
atomic_read(&pnode->cmd_pending);
pnode->last_change_time = jiffies;
}
spin_unlock_irqrestore(shost->host_lock, flags);
} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
time_after(jiffies, pnode->last_change_time +
msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
spin_lock_irqsave(shost->host_lock, flags);
depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
/ 100;
depth = depth ? depth : 1;
pnode->cmd_qdepth += depth;
if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
pnode->last_change_time = jiffies;
spin_unlock_irqrestore(shost->host_lock, flags);
}
}
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
/* The sdev is not guaranteed to be valid post scsi_done upcall. */
queue_depth = cmd->device->queue_depth;
scsi_id = cmd->device->id;
cmd->scsi_done(cmd);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(shost->host_lock, flags);
lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(shost->host_lock, flags);
lpfc_release_scsi_buf(phba, lpfc_cmd);
return;
}
if (!result)
lpfc_rampup_queue_depth(vport, queue_depth);
/*
* Check for queue full. If the lun is reporting queue full, then
* back off the lun queue depth to prevent target overloads.
*/
if (result == SAM_STAT_TASK_SET_FULL && pnode &&
NLP_CHK_NODE_ACT(pnode)) {
shost_for_each_device(tmp_sdev, shost) {
if (tmp_sdev->id != scsi_id)
continue;
depth = scsi_track_queue_full(tmp_sdev,
tmp_sdev->queue_depth-1);
if (depth <= 0)
continue;
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0711 detected queue full - lun queue "
"depth adjusted to %d.\n", depth);
lpfc_send_sdev_queuedepth_change_event(phba, vport,
pnode,
tmp_sdev->lun,
depth+1, depth);
}
}
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(shost->host_lock, flags);
lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(shost->host_lock, flags);
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
/**
* 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(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
{
int i, j;
for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
i += sizeof(uint32_t), j++) {
((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
}
}
/**
* 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 void
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
struct lpfc_nodelist *pnode)
{
struct lpfc_hba *phba = vport->phba;
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
int datadir = scsi_cmnd->sc_data_direction;
char tag[2];
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return;
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);
memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
switch (tag[0]) {
case HEAD_OF_QUEUE_TAG:
fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
break;
case ORDERED_QUEUE_TAG:
fcp_cmnd->fcpCntl1 = ORDERED_Q;
break;
default:
fcp_cmnd->fcpCntl1 = SIMPLE_Q;
break;
}
} else
fcp_cmnd->fcpCntl1 = 0;
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither. Start the lpfc command prep by
* bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
* data bde entry.
*/
if (scsi_sg_count(scsi_cmnd)) {
if (datadir == DMA_TO_DEVICE) {
iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
if (phba->sli_rev < LPFC_SLI_REV4) {
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
} else
iocb_cmd->ulpPU = PARM_READ_CHECK;
fcp_cmnd->fcpCntl3 = WRITE_DATA;
phba->fc4OutputRequests++;
} else {
iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
iocb_cmd->ulpPU = PARM_READ_CHECK;
fcp_cmnd->fcpCntl3 = READ_DATA;
phba->fc4InputRequests++;
}
} else {
iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
fcp_cmnd->fcpCntl3 = 0;
phba->fc4ControlRequests++;
}
if (phba->sli_rev == 3 &&
!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
/*
* 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;
else
piocbq->iocb.ulpFCP2Rcvy = 0;
piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
piocbq->context1 = lpfc_cmd;
piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
piocbq->vport = vport;
}
/**
* lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
* @vport: The virtual port for which this call is being executed.
* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
* @lun: Logical unit number.
* @task_mgmt_cmd: SCSI task management command.
*
* This routine creates FCP information unit corresponding to @task_mgmt_cmd
* for device with SLI-3 interface spec.
*
* Return codes:
* 0 - Error
* 1 - Success
**/
static int
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
struct lpfc_scsi_buf *lpfc_cmd,
unsigned int lun,
uint8_t task_mgmt_cmd)
{
struct lpfc_iocbq *piocbq;
IOCB_t *piocb;
struct fcp_cmnd *fcp_cmnd;
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
ndlp->nlp_state != NLP_STE_MAPPED_NODE)
return 0;
piocbq = &(lpfc_cmd->cur_iocbq);
piocbq->vport = vport;
piocb = &piocbq->iocb;
fcp_cmnd = lpfc_cmd->fcp_cmnd;
/* 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);
fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
if (vport->phba->sli_rev == 3 &&
!(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
piocb->ulpCommand = CMD_FCP_ICMND64_CR;
piocb->ulpContext = ndlp->nlp_rpi;
if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
piocb->ulpFCP2Rcvy = 1;
}
piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
/* ulpTimeout is only one byte */
if (lpfc_cmd->timeout > 0xff) {
/*
* Do not timeout the command at the firmware level.
* The driver will provide the timeout mechanism.
*/
piocb->ulpTimeout = 0;
} else
piocb->ulpTimeout = lpfc_cmd->timeout;
if (vport->phba->sli_rev == LPFC_SLI_REV4)
lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
return 1;
}
/**
* lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
* @phba: The hba struct for which this call is being executed.
* @dev_grp: The HBA PCI-Device group number.
*
* This routine sets up the SCSI interface API function jump table in @phba
* struct.
* Returns: 0 - success, -ENODEV - failure.
**/
int
lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{
phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
switch (dev_grp) {
case LPFC_PCI_DEV_LP:
phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
break;
case LPFC_PCI_DEV_OC:
phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
break;
default:
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"1418 Invalid HBA PCI-device group: 0x%x\n",
dev_grp);
return -ENODEV;
break;
}
phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
return 0;
}
/**
* lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
* @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.
**/
static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
struct lpfc_iocbq *cmdiocbq,
struct lpfc_iocbq *rspiocbq)
{
struct lpfc_scsi_buf *lpfc_cmd =
(struct lpfc_scsi_buf *) cmdiocbq->context1;
if (lpfc_cmd)
lpfc_release_scsi_buf(phba, lpfc_cmd);
return;
}
/**
* lpfc_info - Info entry point of scsi_host_template data structure
* @host: The scsi host for which this call is being executed.
*
* This routine provides module information about hba.
*
* Reutrn code:
* Pointer to char - Success.
**/
const char *
lpfc_info(struct Scsi_Host *host)
{
struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
struct lpfc_hba *phba = vport->phba;
int len;
static char lpfcinfobuf[384];
memset(lpfcinfobuf,0,384);
if (phba && phba->pcidev){
strncpy(lpfcinfobuf, phba->ModelDesc, 256);
len = strlen(lpfcinfobuf);
snprintf(lpfcinfobuf + len,
384-len,
" on PCI bus %02x device %02x irq %d",
phba->pcidev->bus->number,
phba->pcidev->devfn,
phba->pcidev->irq);
len = strlen(lpfcinfobuf);
if (phba->Port[0]) {
snprintf(lpfcinfobuf + len,
384-len,
" port %s",
phba->Port);
}
len = strlen(lpfcinfobuf);
if (phba->sli4_hba.link_state.logical_speed) {
snprintf(lpfcinfobuf + len,
384-len,
" Logical Link Speed: %d Mbps",
phba->sli4_hba.link_state.logical_speed * 10);
}
}
return lpfcinfobuf;
}
/**
* lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
* @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.
**/
static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
{
unsigned long poll_tmo_expires =
(jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
mod_timer(&phba->fcp_poll_timer,
poll_tmo_expires);
}
/**
* lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
* @phba: The Hba for which this call is being executed.
*
* This routine starts the fcp_poll_timer of @phba.
**/
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
lpfc_poll_rearm_timer(phba);
}
/**
* lpfc_poll_timeout - Restart polling timer
* @ptr: Map to lpfc_hba data structure pointer.
*
* This routine restarts fcp_poll timer, when FCP ring polling is enable
* and FCP Ring interrupt is disable.
**/
void lpfc_poll_timeout(unsigned long ptr)
{
struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
}
/**
* lpfc_queuecommand - scsi_host_template queuecommand entry point
* @cmnd: Pointer to scsi_cmnd data structure.
* @done: Pointer to done routine.
*
* Driver registers this routine to scsi midlayer to submit a @cmd to process.
* This routine prepares an IOCB from scsi command and provides to firmware.
* The @done callback is invoked after driver finished processing the command.
*
* Return value :
* 0 - Success
* SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
**/
static int
lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *ndlp;
struct lpfc_scsi_buf *lpfc_cmd;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
int err;
err = fc_remote_port_chkready(rport);
if (err) {
cmnd->result = err;
goto out_fail_command;
}
ndlp = rdata->pnode;
if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
lpfc_printf_log(phba, KERN_ERR, LOG_BG,
"9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
" op:%02x str=%s without registering for"
" BlockGuard - Rejecting command\n",
cmnd->cmnd[0], scsi_get_prot_op(cmnd),
dif_op_str[scsi_get_prot_op(cmnd)]);
goto out_fail_command;
}
/*
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
goto out_fail_command;
}
if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
goto out_tgt_busy;
lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
if (lpfc_cmd == NULL) {
lpfc_rampdown_queue_depth(phba);
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0707 driver's buffer pool is empty, "
"IO busied\n");
goto out_host_busy;
}
/*
* Store the midlayer's command structure for the completion phase
* and complete the command initialization.
*/
lpfc_cmd->pCmd = cmnd;
lpfc_cmd->rdata = rdata;
lpfc_cmd->timeout = 0;
lpfc_cmd->start_time = jiffies;
cmnd->host_scribble = (unsigned char *)lpfc_cmd;
cmnd->scsi_done = done;
if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
if (vport->phba->cfg_enable_bg) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
"str=%s\n",
cmnd->cmnd[0], scsi_get_prot_op(cmnd),
dif_op_str[scsi_get_prot_op(cmnd)]);
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x\n",
cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
cmnd->cmnd[9]);
if (cmnd->cmnd[0] == READ_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9035 BLKGRD: READ @ sector %llu, "
"count %u\n",
(unsigned long long)scsi_get_lba(cmnd),
blk_rq_sectors(cmnd->request));
else if (cmnd->cmnd[0] == WRITE_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9036 BLKGRD: WRITE @ sector %llu, "
"count %u cmd=%p\n",
(unsigned long long)scsi_get_lba(cmnd),
blk_rq_sectors(cmnd->request),
cmnd);
}
err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
} else {
if (vport->phba->cfg_enable_bg) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9038 BLKGRD: rcvd unprotected cmd:"
"%02x op:%02x str=%s\n",
cmnd->cmnd[0], scsi_get_prot_op(cmnd),
dif_op_str[scsi_get_prot_op(cmnd)]);
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9039 BLKGRD: CDB: %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x\n",
cmnd->cmnd[0], cmnd->cmnd[1],
cmnd->cmnd[2], cmnd->cmnd[3],
cmnd->cmnd[4], cmnd->cmnd[5],
cmnd->cmnd[6], cmnd->cmnd[7],
cmnd->cmnd[8], cmnd->cmnd[9]);
if (cmnd->cmnd[0] == READ_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9040 dbg: READ @ sector %llu, "
"count %u\n",
(unsigned long long)scsi_get_lba(cmnd),
blk_rq_sectors(cmnd->request));
else if (cmnd->cmnd[0] == WRITE_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9041 dbg: WRITE @ sector %llu, "
"count %u cmd=%p\n",
(unsigned long long)scsi_get_lba(cmnd),
blk_rq_sectors(cmnd->request), cmnd);
else
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9042 dbg: parser not implemented\n");
}
err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
}
if (err)
goto out_host_busy_free_buf;
lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
atomic_inc(&ndlp->cmd_pending);
err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
&lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
if (err) {
atomic_dec(&ndlp->cmd_pending);
goto out_host_busy_free_buf;
}
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
spin_unlock(shost->host_lock);
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
spin_lock(shost->host_lock);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
return 0;
out_host_busy_free_buf:
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
out_tgt_busy:
return SCSI_MLQUEUE_TARGET_BUSY;
out_fail_command:
done(cmnd);
return 0;
}
static DEF_SCSI_QCMD(lpfc_queuecommand)
/**
* lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine aborts @cmnd pending in base driver.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_abort_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;
struct lpfc_iocbq *iocb;
struct lpfc_iocbq *abtsiocb;
struct lpfc_scsi_buf *lpfc_cmd;
IOCB_t *cmd, *icmd;
int ret = SUCCESS;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
ret = fc_block_scsi_eh(cmnd);
if (ret)
return ret;
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
if (!lpfc_cmd) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"2873 SCSI Layer I/O Abort Request IO CMPL Status "
"x%x ID %d "
"LUN %d snum %#lx\n", ret, cmnd->device->id,
cmnd->device->lun, cmnd->serial_number);
return SUCCESS;
}
/*
* If pCmd field of the corresponding lpfc_scsi_buf structure
* points to a different SCSI command, then the driver has
* already completed this command, but the midlayer did not
* see the completion before the eh fired. Just return
* SUCCESS.
*/
iocb = &lpfc_cmd->cur_iocbq;
if (lpfc_cmd->pCmd != cmnd)
goto out;
BUG_ON(iocb->context1 != lpfc_cmd);
abtsiocb = lpfc_sli_get_iocbq(phba);
if (abtsiocb == NULL) {
ret = FAILED;
goto out;
}
/*
* The scsi command can not be in txq and it is in flight because the
* pCmd is still pointig at the SCSI command we have to abort. There
* is no need to search the txcmplq. Just send an abort to the FW.
*/
cmd = &iocb->iocb;
icmd = &abtsiocb->iocb;
icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
icmd->un.acxri.abortContextTag = cmd->ulpContext;
if (phba->sli_rev == LPFC_SLI_REV4)
icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
else
icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
icmd->ulpLe = 1;
icmd->ulpClass = cmd->ulpClass;
/* ABTS WQE must go to the same WQ as the WQE to be aborted */
abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
if (lpfc_is_link_up(phba))
icmd->ulpCommand = CMD_ABORT_XRI_CN;
else
icmd->ulpCommand = CMD_CLOSE_XRI_CN;
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
abtsiocb->vport = vport;
if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
ret = FAILED;
goto out;
}
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
lpfc_cmd->waitq = &waitq;
/* Wait for abort to complete */
wait_event_timeout(waitq,
(lpfc_cmd->pCmd != cmnd),
(2*vport->cfg_devloss_tmo*HZ));
spin_lock_irq(shost->host_lock);
lpfc_cmd->waitq = NULL;
spin_unlock_irq(shost->host_lock);
if (lpfc_cmd->pCmd == cmnd) {
ret = FAILED;
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0748 abort handler timed out waiting "
"for abort to complete: ret %#x, ID %d, "
"LUN %d, snum %#lx\n",
ret, cmnd->device->id, cmnd->device->lun,
cmnd->serial_number);
}
out:
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0749 SCSI Layer I/O Abort Request Status x%x ID %d "
"LUN %d snum %#lx\n", ret, cmnd->device->id,
cmnd->device->lun, cmnd->serial_number);
return ret;
}
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";
}
}
/**
* lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
* @vport: The virtual port for which this call is being executed.
* @rdata: Pointer to remote port local data
* @tgt_id: Target ID of remote device.
* @lun_id: Lun number for the TMF
* @task_mgmt_cmd: type of TMF to send
*
* This routine builds and sends a TMF (SCSI Task Mgmt Function) to
* a remote port.
*
* Return Code:
* 0x2003 - Error
* 0x2002 - Success.
**/
static int
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
unsigned tgt_id, unsigned int lun_id,
uint8_t task_mgmt_cmd)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *lpfc_cmd;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp;
struct lpfc_nodelist *pnode = rdata->pnode;
int ret;
int status;
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return FAILED;
lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
if (lpfc_cmd == NULL)
return FAILED;
lpfc_cmd->timeout = 60;
lpfc_cmd->rdata = rdata;
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
task_mgmt_cmd);
if (!status) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
return FAILED;
}
iocbq = &lpfc_cmd->cur_iocbq;
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (iocbqrsp == NULL) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
return FAILED;
}
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0702 Issue %s to TGT %d LUN %d "
"rpi x%x nlp_flag x%x\n",
lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
pnode->nlp_rpi, pnode->nlp_flag);
status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (status != IOCB_SUCCESS) {
if (status == IOCB_TIMEDOUT) {
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
ret = TIMEOUT_ERROR;
} else
ret = FAILED;
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
lpfc_taskmgmt_name(task_mgmt_cmd),
tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
iocbqrsp->iocb.un.ulpWord[4]);
} else if (status == IOCB_BUSY)
ret = FAILED;
else
ret = SUCCESS;
lpfc_sli_release_iocbq(phba, iocbqrsp);
if (ret != TIMEOUT_ERROR)
lpfc_release_scsi_buf(phba, lpfc_cmd);
return ret;
}
/**
* lpfc_chk_tgt_mapped -
* @vport: The virtual port to check on
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine delays until the scsi target (aka rport) for the
* command exists (is present and logged in) or we declare it non-existent.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
{
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode;
unsigned long later;
if (!rdata) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0797 Tgt Map rport failure: rdata x%p\n", rdata);
return FAILED;
}
pnode = rdata->pnode;
/*
* If target is not in a MAPPED state, delay until
* target is rediscovered or devloss timeout expires.
*/
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies)) {
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return FAILED;
if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
return SUCCESS;
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
rdata = cmnd->device->hostdata;
if (!rdata)
return FAILED;
pnode = rdata->pnode;
}
if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
(pnode->nlp_state != NLP_STE_MAPPED_NODE))
return FAILED;
return SUCCESS;
}
/**
* lpfc_reset_flush_io_context -
* @vport: The virtual port (scsi_host) for the flush context
* @tgt_id: If aborting by Target contect - specifies the target id
* @lun_id: If aborting by Lun context - specifies the lun id
* @context: specifies the context level to flush at.
*
* After a reset condition via TMF, we need to flush orphaned i/o
* contexts from the adapter. This routine aborts any contexts
* outstanding, then waits for their completions. The wait is
* bounded by devloss_tmo though.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
uint64_t lun_id, lpfc_ctx_cmd context)
{
struct lpfc_hba *phba = vport->phba;
unsigned long later;
int cnt;
cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
tgt_id, lun_id, context);
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies) && cnt) {
schedule_timeout_uninterruptible(msecs_to_jiffies(20));
cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"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;
}
return SUCCESS;
}
/**
* lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does a device reset by sending a LUN_RESET task management
* command.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode;
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status;
if (!rdata) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0798 Device Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
pnode = rdata->pnode;
status = fc_block_scsi_eh(cmnd);
if (status)
return status;
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0721 Device Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_LUNRESET;
scsi_event.lun = lun_id;
memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
FCP_LUN_RESET);
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0713 SCSI layer issued Device Reset (%d, %d) "
"return x%x\n", tgt_id, lun_id, status);
/*
* We have to clean up i/o as : they may be orphaned by the TMF;
* or if the TMF failed, they may be in an indeterminate state.
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_LUN);
return status;
}
/**
* lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does a target reset by sending a TARGET_RESET task management
* command.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode;
unsigned tgt_id = cmnd->device->id;
unsigned int lun_id = cmnd->device->lun;
struct lpfc_scsi_event_header scsi_event;
int status;
if (!rdata) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0799 Target Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
pnode = rdata->pnode;
status = fc_block_scsi_eh(cmnd);
if (status)
return status;
status = lpfc_chk_tgt_mapped(vport, cmnd);
if (status == FAILED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0722 Target Reset rport failure: rdata x%p\n", rdata);
return FAILED;
}
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_TGTRESET;
scsi_event.lun = 0;
memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
FCP_TARGET_RESET);
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0723 SCSI layer issued Target Reset (%d, %d) "
"return x%x\n", tgt_id, lun_id, status);
/*
* We have to clean up i/o as : they may be orphaned by the TMF;
* or if the TMF failed, they may be in an indeterminate state.
* So, continue on.
* We will report success if all the i/o aborts successfully.
*/
status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
LPFC_CTX_TGT);
return status;
}
/**
* lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does target reset to all targets on @cmnd->device->host.
* This emulates Parallel SCSI Bus Reset Semantics.
*
* Return code :
* 0x2003 - Error
* 0x2002 - Success
**/
static int
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_nodelist *ndlp = NULL;
struct lpfc_scsi_event_header scsi_event;
int match;
int ret = SUCCESS, status, i;
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_BUSRESET;
scsi_event.lun = 0;
memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
ret = fc_block_scsi_eh(cmnd);
if (ret)
return ret;
/*
* 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.
*/
for (i = 0; i < LPFC_MAX_TARGET; i++) {
/* Search for mapped node by target ID */
match = 0;
spin_lock_irq(shost->host_lock);
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (!NLP_CHK_NODE_ACT(ndlp))
continue;
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
ndlp->nlp_sid == i &&
ndlp->rport) {
match = 1;
break;
}
}
spin_unlock_irq(shost->host_lock);
if (!match)
continue;
status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
i, 0, FCP_TARGET_RESET);
if (status != SUCCESS) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0700 Bus Reset on target %d failed\n",
i);
ret = FAILED;
}
}
/*
* 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.
*/
status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
if (status != SUCCESS)
ret = FAILED;
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
return ret;
}
/**
* lpfc_slave_alloc - scsi_host_template slave_alloc entry point
* @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
**/
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
uint32_t total = 0;
uint32_t num_to_alloc = 0;
int num_allocated = 0;
uint32_t sdev_cnt;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
sdev->hostdata = rport->dd_data;
sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
/*
* Populate the cmds_per_lun count scsi_bufs into this host's globally
* available list of scsi buffers. Don't allocate more than the
* 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.
*/
total = phba->total_scsi_bufs;
num_to_alloc = vport->cfg_lun_queue_depth + 2;
/* If allocated buffers are enough do nothing */
if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
return 0;
/* Allow some exchanges to be available always to complete discovery */
if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0704 At limitation of %d preallocated "
"command buffers\n", total);
return 0;
/* 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 ) {
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));
num_to_alloc = phba->cfg_hba_queue_depth - total;
}
num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
if (num_to_alloc != num_allocated) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0708 Allocation request of %d "
"command buffers did not succeed. "
"Allocated %d buffers.\n",
num_to_alloc, num_allocated);
}
if (num_allocated > 0)
phba->total_scsi_bufs += num_allocated;
return 0;
}
/**
* lpfc_slave_configure - scsi_host_template slave_configure entry point
* @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
**/
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
else
scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_sli_handle_fast_ring_event(phba,
&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
return 0;
}
/**
* lpfc_slave_destroy - slave_destroy entry point of SHT data structure
* @sdev: Pointer to scsi_device.
*
* This routine sets @sdev hostatdata filed to null.
**/
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
atomic_dec(&phba->sdev_cnt);
sdev->hostdata = NULL;
return;
}
struct scsi_host_template lpfc_template = {
.module = THIS_MODULE,
.name = LPFC_DRIVER_NAME,
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler = lpfc_device_reset_handler,
.eh_target_reset_handler = lpfc_target_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_hba_attrs,
.max_sectors = 0xFFFF,
.vendor_id = LPFC_NL_VENDOR_ID,
.change_queue_depth = lpfc_change_queue_depth,
};
struct scsi_host_template lpfc_vport_template = {
.module = THIS_MODULE,
.name = LPFC_DRIVER_NAME,
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler = lpfc_device_reset_handler,
.eh_target_reset_handler = lpfc_target_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_vport_attrs,
.max_sectors = 0xFFFF,
.change_queue_depth = lpfc_change_queue_depth,
};
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