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linux/drivers/scsi/lpfc/lpfc_scsi.c
James Smart 9bad76719e [SCSI] lpfc 8.3.0 : Add kernel-doc headers to lpfc_scsi.c 
Add kernel-doc function headers to lpfc_scsi.c

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-12-29 11:24:25 -06:00

2124 lines
65 KiB
C
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2008 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/interrupt.h>
#include <linux/delay.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>
#include "lpfc_version.h"
#include "lpfc_hw.h"
#include "lpfc_sli.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
/**
* 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;
spin_lock_irqsave(shost->host_lock, flags);
if (!vport->stat_data_enabled ||
vport->stat_data_blocked ||
!pnode->lat_data ||
(phba->bucket_type == LPFC_NO_BUCKET)) {
spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
latency = jiffies_to_msecs(jiffies - lpfc_cmd->start_time);
if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
phba->bucket_step;
if (i >= LPFC_MAX_BUCKET_COUNT)
i = LPFC_MAX_BUCKET_COUNT;
} 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_adjust_queue_depth: Post RAMP_DOWN_QUEUE event for 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_adjust_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,
struct scsi_device *sdev)
{
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 <= sdev->queue_depth)
return;
spin_lock_irqsave(&phba->hbalock, flags);
if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
phba->last_ramp_up_time = jiffies;
spin_unlock_irqrestore(&phba->hbalock, flags);
spin_lock_irqsave(&phba->pport->work_port_lock, flags);
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, old_queue_depth;
unsigned long num_rsrc_err, num_cmd_success;
int i;
struct lpfc_rport_data *rdata;
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_vpi && 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;
old_queue_depth = sdev->queue_depth;
if (sdev->ordered_tags)
scsi_adjust_queue_depth(sdev,
MSG_ORDERED_TAG,
new_queue_depth);
else
scsi_adjust_queue_depth(sdev,
MSG_SIMPLE_TAG,
new_queue_depth);
rdata = sdev->hostdata;
if (rdata)
lpfc_send_sdev_queuedepth_change_event(
phba, vports[i],
rdata->pnode,
sdev->lun, old_queue_depth,
new_queue_depth);
}
}
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;
struct lpfc_rport_data *rdata;
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for(i = 0; i <= phba->max_vpi && 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;
if (sdev->ordered_tags)
scsi_adjust_queue_depth(sdev,
MSG_ORDERED_TAG,
sdev->queue_depth+1);
else
scsi_adjust_queue_depth(sdev,
MSG_SIMPLE_TAG,
sdev->queue_depth+1);
rdata = sdev->hostdata;
if (rdata)
lpfc_send_sdev_queuedepth_change_event(
phba, vports[i],
rdata->pnode,
sdev->lun,
sdev->queue_depth - 1,
sdev->queue_depth);
}
}
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_vpi && 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: Scsi buffer allocator.
* @vport: The virtual port for which this call being executed.
*
* This routine allocates a scsi buffer, which 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:
* NULL - Error
* Pointer to lpfc_scsi_buf data structure - Success
**/
static struct lpfc_scsi_buf *
lpfc_new_scsi_buf(struct lpfc_vport *vport)
{
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;
psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
if (!psb)
return NULL;
/*
* 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);
return NULL;
}
/* 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);
return NULL;
}
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->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->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) {
/* 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;
return psb;
}
/**
* lpfc_get_scsi_buf: Get a scsi buffer from lpfc_scsi_buf_list list of 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_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;
}
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
return lpfc_cmd;
}
/**
* lpfc_release_scsi_buf: Return a scsi buffer back to hba lpfc_scsi_buf_list 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)
{
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_scsi_prep_dma_buf: Routine to do DMA mapping for 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 does the pci dma mapping for scatter-gather list of scsi cmnd
* field of @lpfc_cmd. 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(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;
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) {
printk(KERN_ERR "%s: Too many sg segments from "
"dma_map_sg. Config %d, seg_cnt %d",
__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 &&
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) {
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));
}
fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
return 0;
}
/**
* 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 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: Routine to un-map DMA mapping of scatter gather.
* @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.
**/
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);
}
/**
* 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 & 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,
"0730 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);
if (resp_info & RSP_LEN_VALID) {
rsplen = be32_to_cpu(fcprsp->rspRspLen);
if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
(fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
host_status = DID_ERROR;
goto out;
}
}
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,
"0716 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,
"0735 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,
"0717 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,
"0720 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 ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
"0734 FCP Read Check Error Data: "
"x%x x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
be32_to_cpu(fcprsp->rspResId),
fcpi_parm, cmnd->cmnd[0]);
host_status = DID_ERROR;
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 = lpfc_cmd->pCmd;
int result;
struct scsi_device *sdev, *tmp_sdev;
int depth = 0;
unsigned long flags;
struct lpfc_fast_path_event *fast_path_evt;
lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
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,
"0729 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:
if (lpfc_cmd->result == IOERR_INVALID_RPI ||
lpfc_cmd->result == IOERR_NO_RESOURCES ||
lpfc_cmd->result == IOERR_ABORT_REQUESTED) {
cmd->result = ScsiResult(DID_REQUEUE, 0);
break;
} /* 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;
sdev = cmd->device;
if (vport->cfg_max_scsicmpl_time &&
time_after(jiffies, lpfc_cmd->start_time +
msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
spin_lock_irqsave(sdev->host->host_lock, flags);
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(sdev->host->host_lock, flags);
} else if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) &&
time_after(jiffies, pnode->last_change_time +
msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
spin_lock_irqsave(sdev->host->host_lock, flags);
pnode->cmd_qdepth += pnode->cmd_qdepth *
LPFC_TGTQ_RAMPUP_PCENT / 100;
if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH)
pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
pnode->last_change_time = jiffies;
spin_unlock_irqrestore(sdev->host->host_lock, flags);
}
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
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(sdev->host->host_lock, flags);
lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(sdev->host->host_lock, flags);
lpfc_release_scsi_buf(phba, lpfc_cmd);
return;
}
if (!result)
lpfc_rampup_queue_depth(vport, sdev);
if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
((jiffies - pnode->last_ramp_up_time) >
LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
((jiffies - pnode->last_q_full_time) >
LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
(vport->cfg_lun_queue_depth > sdev->queue_depth)) {
shost_for_each_device(tmp_sdev, sdev->host) {
if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){
if (tmp_sdev->id != sdev->id)
continue;
if (tmp_sdev->ordered_tags)
scsi_adjust_queue_depth(tmp_sdev,
MSG_ORDERED_TAG,
tmp_sdev->queue_depth+1);
else
scsi_adjust_queue_depth(tmp_sdev,
MSG_SIMPLE_TAG,
tmp_sdev->queue_depth+1);
pnode->last_ramp_up_time = jiffies;
}
}
lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode,
0xFFFFFFFF,
sdev->queue_depth - 1, sdev->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)) {
pnode->last_q_full_time = jiffies;
shost_for_each_device(tmp_sdev, sdev->host) {
if (tmp_sdev->id != sdev->id)
continue;
depth = scsi_track_queue_full(tmp_sdev,
tmp_sdev->queue_depth - 1);
}
/*
* The queue depth cannot be lowered any more.
* Modify the returned error code to store
* the final depth value set by
* scsi_track_queue_full.
*/
if (depth == -1)
depth = sdev->host->cmd_per_lun;
if (depth) {
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, 0xFFFFFFFF,
depth+1, depth);
}
}
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(sdev->host->host_lock, flags);
lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(sdev->host->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: Routine to convert scsi cmnd to FCP information 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.
**/
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;
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
fcp_cmnd->fcpCntl3 = WRITE_DATA;
phba->fc4OutputRequests++;
} else {
iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
iocb_cmd->ulpPU = PARM_READ_CHECK;
iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
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)
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 scsi TM cmnd to FCP information 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.
*
* 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)
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;
}
return 1;
}
/**
* lpc_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_scsi_tgt_reset: Target reset handler.
* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure
* @vport: The virtual port for which this call is being executed.
* @tgt_id: Target ID.
* @lun: Lun number.
* @rdata: Pointer to lpfc_rport_data.
*
* This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID.
*
* Return Code:
* 0x2003 - Error
* 0x2002 - Success.
**/
static int
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
unsigned tgt_id, unsigned int lun,
struct lpfc_rport_data *rdata)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp;
int ret;
int status;
if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
return FAILED;
lpfc_cmd->rdata = rdata;
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
FCP_TARGET_RESET);
if (!status)
return FAILED;
iocbq = &lpfc_cmd->cur_iocbq;
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (!iocbqrsp)
return FAILED;
/* Issue Target Reset to TGT <num> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
status = lpfc_sli_issue_iocb_wait(phba,
&phba->sli.ring[phba->sli.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;
} else {
ret = SUCCESS;
lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
(lpfc_cmd->result & IOERR_DRVR_MASK))
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
}
lpfc_sli_release_iocbq(phba, iocbqrsp);
return ret;
}
/**
* 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);
}
}
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_poll_fcp_ring (phba);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
}
/**
* lpfc_queuecommand: Queuecommand entry point of Scsi Host Templater data
* structure.
* @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(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_sli *psli = &phba->sli;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
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;
}
/*
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
goto out_fail_command;
}
if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
goto out_host_busy;
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL) {
lpfc_adjust_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;
}
lpfc_cmd->start_time = jiffies;
/*
* 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;
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, &phba->sli.ring[psli->fcp_ring],
&lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
if (err)
goto out_host_busy_free_buf;
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_sli_poll_fcp_ring(phba);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
return 0;
out_host_busy_free_buf:
atomic_dec(&ndlp->cmd_pending);
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
out_fail_command:
done(cmnd);
return 0;
}
/**
* lpfc_block_error_handler: Routine to block error handler.
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD.
**/
static void
lpfc_block_error_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
spin_lock_irq(shost->host_lock);
while (rport->port_state == FC_PORTSTATE_BLOCKED) {
spin_unlock_irq(shost->host_lock);
msleep(1000);
spin_lock_irq(shost->host_lock);
}
spin_unlock_irq(shost->host_lock);
return;
}
/**
* lpfc_abort_handler: Eh_abort_handler entry point of Scsi Host Template data
*structure.
* @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_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
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);
lpfc_block_error_handler(cmnd);
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
BUG_ON(!lpfc_cmd);
/*
* 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;
icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
icmd->ulpLe = 1;
icmd->ulpClass = cmd->ulpClass;
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, pring, abtsiocb, 0) == IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
ret = FAILED;
goto out;
}
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_sli_poll_fcp_ring (phba);
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;
}
/**
* lpfc_device_reset_handler: eh_device_reset entry point of Scsi Host Template
*data structure.
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does a device reset by sending a TARGET_RESET task management
* command.
*
* Return code :
* 0x2003 - Error
* 0ex2002 - 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_hba *phba = vport->phba;
struct lpfc_scsi_buf *lpfc_cmd;
struct lpfc_iocbq *iocbq, *iocbqrsp;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
unsigned long later;
int ret = SUCCESS;
int status;
int cnt;
struct lpfc_scsi_event_header scsi_event;
lpfc_block_error_handler(cmnd);
/*
* If target is not in a MAPPED state, delay the reset 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)
break;
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
rdata = cmnd->device->hostdata;
if (!rdata)
break;
pnode = rdata->pnode;
}
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);
if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0721 LUN Reset rport "
"failure: msec x%x rdata x%p\n",
jiffies_to_msecs(jiffies - later), rdata);
return FAILED;
}
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL)
return FAILED;
lpfc_cmd->timeout = 60;
lpfc_cmd->rdata = rdata;
status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd,
cmnd->device->lun,
FCP_TARGET_RESET);
if (!status) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
return FAILED;
}
iocbq = &lpfc_cmd->cur_iocbq;
/* get a buffer for this IOCB command response */
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,
"0703 Issue target reset to TGT %d LUN %d "
"rpi x%x nlp_flag x%x\n", cmnd->device->id,
cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
status = lpfc_sli_issue_iocb_wait(phba,
&phba->sli.ring[phba->sli.fcp_ring],
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (status == IOCB_TIMEDOUT) {
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
ret = TIMEOUT_ERROR;
} else {
if (status != IOCB_SUCCESS)
ret = FAILED;
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0713 SCSI layer issued device reset (%d, %d) "
"return x%x status x%x result x%x\n",
cmnd->device->id, cmnd->device->lun, ret,
iocbqrsp->iocb.ulpStatus,
iocbqrsp->iocb.un.ulpWord[4]);
lpfc_sli_release_iocbq(phba, iocbqrsp);
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
LPFC_CTX_TGT);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
cmnd->device->id, cmnd->device->lun,
LPFC_CTX_TGT);
later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
while (time_after(later, jiffies) && cnt) {
schedule_timeout_uninterruptible(msecs_to_jiffies(20));
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
cmnd->device->lun, LPFC_CTX_TGT);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0719 device reset I/O flush failure: "
"cnt x%x\n", cnt);
ret = FAILED;
}
return ret;
}
/**
* lpfc_bus_reset_handler: eh_bus_reset_handler entry point of Scsi Host
* Template data structure.
* @cmnd: Pointer to scsi_cmnd data structure.
*
* This routine does target reset to all target on @cmnd->device->host.
*
* Return Code:
* 0x2003 - Error
* 0x2002 - Success
**/
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_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
int match;
int ret = SUCCESS, status = SUCCESS, i;
int cnt;
struct lpfc_scsi_buf * lpfc_cmd;
unsigned long later;
struct lpfc_scsi_event_header scsi_event;
scsi_event.event_type = FC_REG_SCSI_EVENT;
scsi_event.subcategory = LPFC_EVENT_BUSRESET;
scsi_event.lun = 0;
memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
fc_host_post_vendor_event(shost,
fc_get_event_number(),
sizeof(scsi_event),
(char *)&scsi_event,
LPFC_NL_VENDOR_ID);
lpfc_block_error_handler(cmnd);
/*
* 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;
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd) {
lpfc_cmd->timeout = 60;
status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
cmnd->device->lun,
ndlp->rport->dd_data);
if (status != TIMEOUT_ERROR)
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
if (!lpfc_cmd || status != SUCCESS) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0700 Bus Reset on target %d failed\n",
i);
ret = FAILED;
}
}
/*
* All outstanding txcmplq I/Os should have been aborted by
* the targets. Unfortunately, some targets do not abide by
* this forcing the driver to double check.
*/
cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
0, 0, LPFC_CTX_HOST);
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, 0, 0, LPFC_CTX_HOST);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0715 Bus Reset I/O flush failure: "
"cnt x%x left x%x\n", cnt, i);
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: slave_alloc entry point of Scsi Host Template data
* structure.
* @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 lpfc_scsi_buf *scsi_buf = NULL;
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
uint32_t total = 0, i;
uint32_t num_to_alloc = 0;
unsigned long flags;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
sdev->hostdata = rport->dd_data;
/*
* 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;
/* 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;
}
for (i = 0; i < num_to_alloc; i++) {
scsi_buf = lpfc_new_scsi_buf(vport);
if (!scsi_buf) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0706 Failed to allocate "
"command buffer\n");
break;
}
spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
phba->total_scsi_bufs++;
list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
}
return 0;
}
/**
* lpfc_slave_configure: slave_configure entry point of Scsi Host Templater data
* structure.
* @sdev: Pointer to scsi_device.
*
* This routine configures following items
* - Tag command queuing support for @sdev if supported.
* - Dev loss time out value of fc_rport.
* - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
*
* Return codes:
* 0 - Success
**/
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;
struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
else
scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
/*
* Initialize the fc transport attributes for the target
* containing this scsi device. Also note that the driver's
* target pointer is stored in the starget_data for the
* driver's sysfs entry point functions.
*/
rport->dev_loss_tmo = vport->cfg_devloss_tmo;
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_sli_poll_fcp_ring(phba);
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_poll_rearm_timer(phba);
}
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)
{
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_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,
};
struct scsi_host_template lpfc_vport_template = {
.module = THIS_MODULE,
.name = LPFC_DRIVER_NAME,
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler= lpfc_device_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.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,
};
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