- 根目录:
- drivers
- scsi
- bfa
- bfad_im.c
/*
* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
/*
* bfad_im.c Linux driver IM module.
*/
#include <linux/export.h>
#include "bfad_drv.h"
#include "bfad_im.h"
#include "bfa_fcs.h"
BFA_TRC_FILE(LDRV, IM);
DEFINE_IDR(bfad_im_port_index);
struct scsi_transport_template *bfad_im_scsi_transport_template;
struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
static void bfad_im_itnim_work_handler(struct work_struct *work);
static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
static int bfad_im_slave_alloc(struct scsi_device *sdev);
static void bfad_im_fc_rport_add(struct bfad_im_port_s *im_port,
struct bfad_itnim_s *itnim);
void
bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
enum bfi_ioim_status io_status, u8 scsi_status,
int sns_len, u8 *sns_info, s32 residue)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
struct bfad_s *bfad = drv;
struct bfad_itnim_data_s *itnim_data;
struct bfad_itnim_s *itnim;
u8 host_status = DID_OK;
switch (io_status) {
case BFI_IOIM_STS_OK:
bfa_trc(bfad, scsi_status);
scsi_set_resid(cmnd, 0);
if (sns_len > 0) {
bfa_trc(bfad, sns_len);
if (sns_len > SCSI_SENSE_BUFFERSIZE)
sns_len = SCSI_SENSE_BUFFERSIZE;
memcpy(cmnd->sense_buffer, sns_info, sns_len);
}
if (residue > 0) {
bfa_trc(bfad, residue);
scsi_set_resid(cmnd, residue);
if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
(scsi_bufflen(cmnd) - residue) <
cmnd->underflow) {
bfa_trc(bfad, 0);
host_status = DID_ERROR;
}
}
cmnd->result = ScsiResult(host_status, scsi_status);
break;
case BFI_IOIM_STS_ABORTED:
case BFI_IOIM_STS_TIMEDOUT:
case BFI_IOIM_STS_PATHTOV:
default:
host_status = DID_ERROR;
cmnd->result = ScsiResult(host_status, 0);
}
/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
if (cmnd->device->host != NULL)
scsi_dma_unmap(cmnd);
cmnd->host_scribble = NULL;
bfa_trc(bfad, cmnd->result);
itnim_data = cmnd->device->hostdata;
if (itnim_data) {
itnim = itnim_data->itnim;
if (!cmnd->result && itnim &&
(bfa_lun_queue_depth > cmnd->device->queue_depth)) {
/* Queue depth adjustment for good status completion */
bfad_ramp_up_qdepth(itnim, cmnd->device);
} else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
/* qfull handling */
bfad_handle_qfull(itnim, cmnd->device);
}
}
cmnd->scsi_done(cmnd);
}
void
bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
struct bfad_itnim_data_s *itnim_data;
struct bfad_itnim_s *itnim;
cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
if (cmnd->device->host != NULL)
scsi_dma_unmap(cmnd);
cmnd->host_scribble = NULL;
/* Queue depth adjustment */
if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
itnim_data = cmnd->device->hostdata;
if (itnim_data) {
itnim = itnim_data->itnim;
if (itnim)
bfad_ramp_up_qdepth(itnim, cmnd->device);
}
}
cmnd->scsi_done(cmnd);
}
void
bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
struct bfad_s *bfad = drv;
cmnd->result = ScsiResult(DID_ERROR, 0);
/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
if (cmnd->device->host != NULL)
scsi_dma_unmap(cmnd);
bfa_trc(bfad, cmnd->result);
cmnd->host_scribble = NULL;
}
void
bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
enum bfi_tskim_status tsk_status)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
wait_queue_head_t *wq;
cmnd->SCp.Status |= tsk_status << 1;
set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
wq = (wait_queue_head_t *) cmnd->SCp.ptr;
cmnd->SCp.ptr = NULL;
if (wq)
wake_up(wq);
}
/*
* Scsi_Host_template SCSI host template
*/
/*
* Scsi_Host template entry, returns BFAD PCI info.
*/
static const char *
bfad_im_info(struct Scsi_Host *shost)
{
static char bfa_buf[256];
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
struct bfad_s *bfad = im_port->bfad;
memset(bfa_buf, 0, sizeof(bfa_buf));
snprintf(bfa_buf, sizeof(bfa_buf),
"Brocade FC/FCOE Adapter, " "hwpath: %s driver: %s",
bfad->pci_name, BFAD_DRIVER_VERSION);
return bfa_buf;
}
/*
* Scsi_Host template entry, aborts the specified SCSI command.
*
* Returns: SUCCESS or FAILED.
*/
static int
bfad_im_abort_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
struct bfad_s *bfad = im_port->bfad;
struct bfa_ioim_s *hal_io;
unsigned long flags;
u32 timeout;
int rc = FAILED;
spin_lock_irqsave(&bfad->bfad_lock, flags);
hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
if (!hal_io) {
/* IO has been completed, return success */
rc = SUCCESS;
goto out;
}
if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
rc = FAILED;
goto out;
}
bfa_trc(bfad, hal_io->iotag);
BFA_LOG(KERN_INFO, bfad, bfa_log_level,
"scsi%d: abort cmnd %p iotag %x\n",
im_port->shost->host_no, cmnd, hal_io->iotag);
(void) bfa_ioim_abort(hal_io);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
/* Need to wait until the command get aborted */
timeout = 10;
while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(timeout);
if (timeout < 4 * HZ)
timeout *= 2;
}
cmnd->scsi_done(cmnd);
bfa_trc(bfad, hal_io->iotag);
BFA_LOG(KERN_INFO, bfad, bfa_log_level,
"scsi%d: complete abort 0x%p iotag 0x%x\n",
im_port->shost->host_no, cmnd, hal_io->iotag);
return SUCCESS;
out:
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
return rc;
}
static bfa_status_t
bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
struct bfad_itnim_s *itnim)
{
struct bfa_tskim_s *tskim;
struct bfa_itnim_s *bfa_itnim;
bfa_status_t rc = BFA_STATUS_OK;
struct scsi_lun scsilun;
tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
if (!tskim) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"target reset, fail to allocate tskim\n");
rc = BFA_STATUS_FAILED;
goto out;
}
/*
* Set host_scribble to NULL to avoid aborting a task command if
* happens.
*/
cmnd->host_scribble = NULL;
cmnd->SCp.Status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
memset(&scsilun, 0, sizeof(scsilun));
bfa_tskim_start(tskim, bfa_itnim, scsilun,
FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
out:
return rc;
}
/*
* Scsi_Host template entry, resets a LUN and abort its all commands.
*
* Returns: SUCCESS or FAILED.
*
*/
static int
bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
struct bfad_s *bfad = im_port->bfad;
struct bfa_tskim_s *tskim;
struct bfad_itnim_s *itnim;
struct bfa_itnim_s *bfa_itnim;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
int rc = SUCCESS;
unsigned long flags;
enum bfi_tskim_status task_status;
struct scsi_lun scsilun;
spin_lock_irqsave(&bfad->bfad_lock, flags);
itnim = itnim_data->itnim;
if (!itnim) {
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
rc = FAILED;
goto out;
}
tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
if (!tskim) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"LUN reset, fail to allocate tskim");
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
rc = FAILED;
goto out;
}
/*
* Set host_scribble to NULL to avoid aborting a task command
* if happens.
*/
cmnd->host_scribble = NULL;
cmnd->SCp.ptr = (char *)&wq;
cmnd->SCp.Status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
int_to_scsilun(cmnd->device->lun, &scsilun);
bfa_tskim_start(tskim, bfa_itnim, scsilun,
FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
wait_event(wq, test_bit(IO_DONE_BIT,
(unsigned long *)&cmnd->SCp.Status));
task_status = cmnd->SCp.Status >> 1;
if (task_status != BFI_TSKIM_STS_OK) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"LUN reset failure, status: %d\n", task_status);
rc = FAILED;
}
out:
return rc;
}
/*
* Scsi_Host template entry, resets the bus and abort all commands.
*/
static int
bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
struct bfad_s *bfad = im_port->bfad;
struct bfad_itnim_s *itnim;
unsigned long flags;
u32 i, rc, err_cnt = 0;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
enum bfi_tskim_status task_status;
spin_lock_irqsave(&bfad->bfad_lock, flags);
for (i = 0; i < MAX_FCP_TARGET; i++) {
itnim = bfad_get_itnim(im_port, i);
if (itnim) {
cmnd->SCp.ptr = (char *)&wq;
rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
if (rc != BFA_STATUS_OK) {
err_cnt++;
continue;
}
/* wait target reset to complete */
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
wait_event(wq, test_bit(IO_DONE_BIT,
(unsigned long *)&cmnd->SCp.Status));
spin_lock_irqsave(&bfad->bfad_lock, flags);
task_status = cmnd->SCp.Status >> 1;
if (task_status != BFI_TSKIM_STS_OK) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"target reset failure,"
" status: %d\n", task_status);
err_cnt++;
}
}
}
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
if (err_cnt)
return FAILED;
return SUCCESS;
}
/*
* Scsi_Host template entry slave_destroy.
*/
static void
bfad_im_slave_destroy(struct scsi_device *sdev)
{
sdev->hostdata = NULL;
return;
}
/*
* BFA FCS itnim callbacks
*/
/*
* BFA FCS itnim alloc callback, after successful PRLI
* Context: Interrupt
*/
void
bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
struct bfad_itnim_s **itnim_drv)
{
*itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
if (*itnim_drv == NULL)
return;
(*itnim_drv)->im = bfad->im;
*itnim = &(*itnim_drv)->fcs_itnim;
(*itnim_drv)->state = ITNIM_STATE_NONE;
/*
* Initiaze the itnim_work
*/
INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
bfad->bfad_flags |= BFAD_RPORT_ONLINE;
}
/*
* BFA FCS itnim free callback.
* Context: Interrupt. bfad_lock is held
*/
void
bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
{
struct bfad_port_s *port;
wwn_t wwpn;
u32 fcid;
char wwpn_str[32], fcid_str[16];
struct bfad_im_s *im = itnim_drv->im;
/* online to free state transtion should not happen */
WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
itnim_drv->queue_work = 1;
/* offline request is not yet done, use the same request to free */
if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
itnim_drv->queue_work = 0;
itnim_drv->state = ITNIM_STATE_FREE;
port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
itnim_drv->im_port = port->im_port;
wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
wwn2str(wwpn_str, wwpn);
fcid2str(fcid_str, fcid);
BFA_LOG(KERN_INFO, bfad, bfa_log_level,
"ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
port->im_port->shost->host_no,
fcid_str, wwpn_str);
/* ITNIM processing */
if (itnim_drv->queue_work)
queue_work(im->drv_workq, &itnim_drv->itnim_work);
}
/*
* BFA FCS itnim online callback.
* Context: Interrupt. bfad_lock is held
*/
void
bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
{
struct bfad_port_s *port;
struct bfad_im_s *im = itnim_drv->im;
itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
itnim_drv->state = ITNIM_STATE_ONLINE;
itnim_drv->queue_work = 1;
itnim_drv->im_port = port->im_port;
/* ITNIM processing */
if (itnim_drv->queue_work)
queue_work(im->drv_workq, &itnim_drv->itnim_work);
}
/*
* BFA FCS itnim offline callback.
* Context: Interrupt. bfad_lock is held
*/
void
bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
{
struct bfad_port_s *port;
struct bfad_s *bfad;
struct bfad_im_s *im = itnim_drv->im;
port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
bfad = port->bfad;
if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
(port->flags & BFAD_PORT_DELETE)) {
itnim_drv->state = ITNIM_STATE_OFFLINE;
return;
}
itnim_drv->im_port = port->im_port;
itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
itnim_drv->queue_work = 1;
/* ITNIM processing */
if (itnim_drv->queue_work)
queue_work(im->drv_workq, &itnim_drv->itnim_work);
}
/*
* Allocate a Scsi_Host for a port.
*/
int
bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
struct device *dev)
{
int error = 1;
mutex_lock(&bfad_mutex);
error = idr_alloc(&bfad_im_port_index, im_port, 0, 0, GFP_KERNEL);
if (error < 0) {
mutex_unlock(&bfad_mutex);
printk(KERN_WARNING "idr_alloc failure\n");
goto out;
}
im_port->idr_id = error;
mutex_unlock(&bfad_mutex);
im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
if (!im_port->shost) {
error = 1;
goto out_free_idr;
}
im_port->shost->hostdata[0] = (unsigned long)im_port;
im_port->shost->unique_id = im_port->idr_id;
im_port->shost->this_id = -1;
im_port->shost->max_id = MAX_FCP_TARGET;
im_port->shost->max_lun = MAX_FCP_LUN;
im_port->shost->max_cmd_len = 16;
im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
im_port->shost->transportt = bfad_im_scsi_transport_template;
else
im_port->shost->transportt =
bfad_im_scsi_vport_transport_template;
error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
if (error) {
printk(KERN_WARNING "scsi_add_host failure %d\n", error);
goto out_fc_rel;
}
return 0;
out_fc_rel:
scsi_host_put(im_port->shost);
im_port->shost = NULL;
out_free_idr:
mutex_lock(&bfad_mutex);
idr_remove(&bfad_im_port_index, im_port->idr_id);
mutex_unlock(&bfad_mutex);
out:
return error;
}
void
bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
{
bfa_trc(bfad, bfad->inst_no);
BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
im_port->shost->host_no);
fc_remove_host(im_port->shost);
scsi_remove_host(im_port->shost);
scsi_host_put(im_port->shost);
mutex_lock(&bfad_mutex);
idr_remove(&bfad_im_port_index, im_port->idr_id);
mutex_unlock(&bfad_mutex);
}
static void
bfad_im_port_delete_handler(struct work_struct *work)
{
struct bfad_im_port_s *im_port =
container_of(work, struct bfad_im_port_s, port_delete_work);
if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
im_port->flags |= BFAD_PORT_DELETE;
fc_vport_terminate(im_port->fc_vport);
}
}
bfa_status_t
bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
{
int rc = BFA_STATUS_OK;
struct bfad_im_port_s *im_port;
im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
if (im_port == NULL) {
rc = BFA_STATUS_ENOMEM;
goto ext;
}
port->im_port = im_port;
im_port->port = port;
im_port->bfad = bfad;
INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
INIT_LIST_HEAD(&im_port->itnim_mapped_list);
INIT_LIST_HEAD(&im_port->binding_list);
ext:
return rc;
}
void
bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
{
struct bfad_im_port_s *im_port = port->im_port;
queue_work(bfad->im->drv_workq,
&im_port->port_delete_work);
}
void
bfad_im_port_clean(struct bfad_im_port_s *im_port)
{
struct bfad_fcp_binding *bp, *bp_new;
unsigned long flags;
struct bfad_s *bfad = im_port->bfad;
spin_lock_irqsave(&bfad->bfad_lock, flags);
list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
list_entry) {
list_del(&bp->list_entry);
kfree(bp);
}
/* the itnim_mapped_list must be empty at this time */
WARN_ON(!list_empty(&im_port->itnim_mapped_list));
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
}
static void bfad_aen_im_notify_handler(struct work_struct *work)
{
struct bfad_im_s *im =
container_of(work, struct bfad_im_s, aen_im_notify_work);
struct bfa_aen_entry_s *aen_entry;
struct bfad_s *bfad = im->bfad;
struct Scsi_Host *shost = bfad->pport.im_port->shost;
void *event_data;
unsigned long flags;
while (!list_empty(&bfad->active_aen_q)) {
spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
bfa_q_deq(&bfad->active_aen_q, &aen_entry);
spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
event_data = (char *)aen_entry + sizeof(struct list_head);
fc_host_post_vendor_event(shost, fc_get_event_number(),
sizeof(struct bfa_aen_entry_s) -
sizeof(struct list_head),
(char *)event_data, BFAD_NL_VENDOR_ID);
spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
list_add_tail(&aen_entry->qe, &bfad->free_aen_q);
spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
}
}
bfa_status_t
bfad_im_probe(struct bfad_s *bfad)
{
struct bfad_im_s *im;
im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
if (im == NULL)
return BFA_STATUS_ENOMEM;
bfad->im = im;
im->bfad = bfad;
if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
kfree(im);
return BFA_STATUS_FAILED;
}
INIT_WORK(&im->aen_im_notify_work, bfad_aen_im_notify_handler);
return BFA_STATUS_OK;
}
void
bfad_im_probe_undo(struct bfad_s *bfad)
{
if (bfad->im) {
bfad_destroy_workq(bfad->im);
kfree(bfad->im);
bfad->im = NULL;
}
}
struct Scsi_Host *
bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
{
struct scsi_host_template *sht;
if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
sht = &bfad_im_scsi_host_template;
else
sht = &bfad_im_vport_template;
if (max_xfer_size != BFAD_MAX_SECTORS >> 1)
sht->max_sectors = max_xfer_size << 1;
sht->sg_tablesize = bfad->cfg_data.io_max_sge;
return scsi_host_alloc(sht, sizeof(unsigned long));
}
void
bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
{
if (!(im_port->flags & BFAD_PORT_DELETE))
flush_workqueue(bfad->im->drv_workq);
bfad_im_scsi_host_free(im_port->bfad, im_port);
bfad_im_port_clean(im_port);
kfree(im_port);
}
void
bfad_destroy_workq(struct bfad_im_s *im)
{
if (im && im->drv_workq) {
flush_workqueue(im->drv_workq);
destroy_workqueue(im->drv_workq);
im->drv_workq = NULL;
}
}
bfa_status_t
bfad_thread_workq(struct bfad_s *bfad)
{
struct bfad_im_s *im = bfad->im;
bfa_trc(bfad, 0);
snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
bfad->inst_no);
im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
if (!im->drv_workq)
return BFA_STATUS_FAILED;
return BFA_STATUS_OK;
}
/*
* Scsi_Host template entry.
*
* Description:
* OS entry point to adjust the queue_depths on a per-device basis.
* Called once per device during the bus scan.
* Return non-zero if fails.
*/
static int
bfad_im_slave_configure(struct scsi_device *sdev)
{
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, bfa_lun_queue_depth);
else
scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
return 0;
}
struct scsi_host_template bfad_im_scsi_host_template = {
.module = THIS_MODULE,
.name = BFAD_DRIVER_NAME,
.info = bfad_im_info,
.queuecommand = bfad_im_queuecommand,
.eh_abort_handler = bfad_im_abort_handler,
.eh_device_reset_handler = bfad_im_reset_lun_handler,
.eh_bus_reset_handler = bfad_im_reset_bus_handler,
.slave_alloc = bfad_im_slave_alloc,
.slave_configure = bfad_im_slave_configure,
.slave_destroy = bfad_im_slave_destroy,
.this_id = -1,
.sg_tablesize = BFAD_IO_MAX_SGE,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = bfad_im_host_attrs,
.max_sectors = BFAD_MAX_SECTORS,
.vendor_id = BFA_PCI_VENDOR_ID_BROCADE,
};
struct scsi_host_template bfad_im_vport_template = {
.module = THIS_MODULE,
.name = BFAD_DRIVER_NAME,
.info = bfad_im_info,
.queuecommand = bfad_im_queuecommand,
.eh_abort_handler = bfad_im_abort_handler,
.eh_device_reset_handler = bfad_im_reset_lun_handler,
.eh_bus_reset_handler = bfad_im_reset_bus_handler,
.slave_alloc = bfad_im_slave_alloc,
.slave_configure = bfad_im_slave_configure,
.slave_destroy = bfad_im_slave_destroy,
.this_id = -1,
.sg_tablesize = BFAD_IO_MAX_SGE,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = bfad_im_vport_attrs,
.max_sectors = BFAD_MAX_SECTORS,
};
bfa_status_t
bfad_im_module_init(void)
{
bfad_im_scsi_transport_template =
fc_attach_transport(&bfad_im_fc_function_template);
if (!bfad_im_scsi_transport_template)
return BFA_STATUS_ENOMEM;
bfad_im_scsi_vport_transport_template =
fc_attach_transport(&bfad_im_vport_fc_function_template);
if (!bfad_im_scsi_vport_transport_template) {
fc_release_transport(bfad_im_scsi_transport_template);
return BFA_STATUS_ENOMEM;
}
return BFA_STATUS_OK;
}
void
bfad_im_module_exit(void)
{
if (bfad_im_scsi_transport_template)
fc_release_transport(bfad_im_scsi_transport_template);
if (bfad_im_scsi_vport_transport_template)
fc_release_transport(bfad_im_scsi_vport_transport_template);
}
void
bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
{
struct scsi_device *tmp_sdev;
if (((jiffies - itnim->last_ramp_up_time) >
BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
((jiffies - itnim->last_queue_full_time) >
BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
shost_for_each_device(tmp_sdev, sdev->host) {
if (bfa_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);
itnim->last_ramp_up_time = jiffies;
}
}
}
}
void
bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
{
struct scsi_device *tmp_sdev;
itnim->last_queue_full_time = jiffies;
shost_for_each_device(tmp_sdev, sdev->host) {
if (tmp_sdev->id != sdev->id)
continue;
scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
}
}
struct bfad_itnim_s *
bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
{
struct bfad_itnim_s *itnim = NULL;
/* Search the mapped list for this target ID */
list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
if (id == itnim->scsi_tgt_id)
return itnim;
}
return NULL;
}
/*
* Function is invoked from the SCSI Host Template slave_alloc() entry point.
* Has the logic to query the LUN Mask database to check if this LUN needs to
* be made visible to the SCSI mid-layer or not.
*
* Returns BFA_STATUS_OK if this LUN needs to be added to the OS stack.
* Returns -ENXIO to notify SCSI mid-layer to not add this LUN to the OS stack.
*/
static int
bfad_im_check_if_make_lun_visible(struct scsi_device *sdev,
struct fc_rport *rport)
{
struct bfad_itnim_data_s *itnim_data =
(struct bfad_itnim_data_s *) rport->dd_data;
struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
struct bfa_rport_s *bfa_rport = itnim_data->itnim->bfa_itnim->rport;
struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(bfa);
int i = 0, ret = -ENXIO;
for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE &&
scsilun_to_int(&lun_list[i].lun) == sdev->lun &&
lun_list[i].rp_tag == bfa_rport->rport_tag &&
lun_list[i].lp_tag == (u8)bfa_rport->rport_info.lp_tag) {
ret = BFA_STATUS_OK;
break;
}
}
return ret;
}
/*
* Scsi_Host template entry slave_alloc
*/
static int
bfad_im_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
struct bfad_itnim_data_s *itnim_data;
struct bfa_s *bfa;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
itnim_data = (struct bfad_itnim_data_s *) rport->dd_data;
bfa = itnim_data->itnim->bfa_itnim->bfa;
if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED) {
/*
* We should not mask LUN 0 - since this will translate
* to no LUN / TARGET for SCSI ml resulting no scan.
*/
if (sdev->lun == 0) {
sdev->sdev_bflags |= BLIST_NOREPORTLUN |
BLIST_SPARSELUN;
goto done;
}
/*
* Query LUN Mask configuration - to expose this LUN
* to the SCSI mid-layer or to mask it.
*/
if (bfad_im_check_if_make_lun_visible(sdev, rport) !=
BFA_STATUS_OK)
return -ENXIO;
}
done:
sdev->hostdata = rport->dd_data;
return 0;
}
u32
bfad_im_supported_speeds(struct bfa_s *bfa)
{
struct bfa_ioc_attr_s *ioc_attr;
u32 supported_speed = 0;
ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
if (!ioc_attr)
return 0;
bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_16GBPS)
supported_speed |= FC_PORTSPEED_16GBIT | FC_PORTSPEED_8GBIT |
FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT;
else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
if (ioc_attr->adapter_attr.is_mezz) {
supported_speed |= FC_PORTSPEED_8GBIT |
FC_PORTSPEED_4GBIT |
FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
} else {
supported_speed |= FC_PORTSPEED_8GBIT |
FC_PORTSPEED_4GBIT |
FC_PORTSPEED_2GBIT;
}
} else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
supported_speed |= FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
FC_PORTSPEED_1GBIT;
} else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
supported_speed |= FC_PORTSPEED_10GBIT;
}
kfree(ioc_attr);
return supported_speed;
}
void
bfad_fc_host_init(struct bfad_im_port_s *im_port)
{
struct Scsi_Host *host = im_port->shost;
struct bfad_s *bfad = im_port->bfad;
struct bfad_port_s *port = im_port->port;
char symname[BFA_SYMNAME_MAXLEN];
struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
fc_host_node_name(host) =
cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
fc_host_port_name(host) =
cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
fc_host_supported_classes(host) = FC_COS_CLASS3;
memset(fc_host_supported_fc4s(host), 0,
sizeof(fc_host_supported_fc4s(host)));
if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
/* For FCP type 0x08 */
fc_host_supported_fc4s(host)[2] = 1;
/* For fibre channel services type 0x20 */
fc_host_supported_fc4s(host)[7] = 1;
strlcpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
BFA_SYMNAME_MAXLEN);
sprintf(fc_host_symbolic_name(host), "%s", symname);
fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
}
static void
bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
{
struct fc_rport_identifiers rport_ids;
struct fc_rport *fc_rport;
struct bfad_itnim_data_s *itnim_data;
rport_ids.node_name =
cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
rport_ids.port_name =
cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
rport_ids.port_id =
bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
itnim->fc_rport = fc_rport =
fc_remote_port_add(im_port->shost, 0, &rport_ids);
if (!fc_rport)
return;
fc_rport->maxframe_size =
bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
itnim_data = fc_rport->dd_data;
itnim_data->itnim = itnim;
rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
fc_remote_port_rolechg(fc_rport, rport_ids.roles);
if ((fc_rport->scsi_target_id != -1)
&& (fc_rport->scsi_target_id < MAX_FCP_TARGET))
itnim->scsi_tgt_id = fc_rport->scsi_target_id;
itnim->channel = fc_rport->channel;
return;
}
/*
* Work queue handler using FC transport service
* Context: kernel
*/
static void
bfad_im_itnim_work_handler(struct work_struct *work)
{
struct bfad_itnim_s *itnim = container_of(work, struct bfad_itnim_s,
itnim_work);
struct bfad_im_s *im = itnim->im;
struct bfad_s *bfad = im->bfad;
struct bfad_im_port_s *im_port;
unsigned long flags;
struct fc_rport *fc_rport;
wwn_t wwpn;
u32 fcid;
char wwpn_str[32], fcid_str[16];
spin_lock_irqsave(&bfad->bfad_lock, flags);
im_port = itnim->im_port;
bfa_trc(bfad, itnim->state);
switch (itnim->state) {
case ITNIM_STATE_ONLINE:
if (!itnim->fc_rport) {
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
bfad_im_fc_rport_add(im_port, itnim);
spin_lock_irqsave(&bfad->bfad_lock, flags);
wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
wwn2str(wwpn_str, wwpn);
fcid2str(fcid_str, fcid);
list_add_tail(&itnim->list_entry,
&im_port->itnim_mapped_list);
BFA_LOG(KERN_INFO, bfad, bfa_log_level,
"ITNIM ONLINE Target: %d:0:%d "
"FCID: %s WWPN: %s\n",
im_port->shost->host_no,
itnim->scsi_tgt_id,
fcid_str, wwpn_str);
} else {
printk(KERN_WARNING
"%s: itnim %llx is already in online state\n",
__func__,
bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
}
break;
case ITNIM_STATE_OFFLINE_PENDING:
itnim->state = ITNIM_STATE_OFFLINE;
if (itnim->fc_rport) {
fc_rport = itnim->fc_rport;
((struct bfad_itnim_data_s *)
fc_rport->dd_data)->itnim = NULL;
itnim->fc_rport = NULL;
if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
fc_rport->dev_loss_tmo =
bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
fc_remote_port_delete(fc_rport);
spin_lock_irqsave(&bfad->bfad_lock, flags);
}
wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
wwn2str(wwpn_str, wwpn);
fcid2str(fcid_str, fcid);
list_del(&itnim->list_entry);
BFA_LOG(KERN_INFO, bfad, bfa_log_level,
"ITNIM OFFLINE Target: %d:0:%d "
"FCID: %s WWPN: %s\n",
im_port->shost->host_no,
itnim->scsi_tgt_id,
fcid_str, wwpn_str);
}
break;
case ITNIM_STATE_FREE:
if (itnim->fc_rport) {
fc_rport = itnim->fc_rport;
((struct bfad_itnim_data_s *)
fc_rport->dd_data)->itnim = NULL;
itnim->fc_rport = NULL;
if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
fc_rport->dev_loss_tmo =
bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
fc_remote_port_delete(fc_rport);
spin_lock_irqsave(&bfad->bfad_lock, flags);
}
list_del(&itnim->list_entry);
}
kfree(itnim);
break;
default:
WARN_ON(1);
break;
}
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
}
/*
* Scsi_Host template entry, queue a SCSI command to the BFAD.
*/
static int
bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
struct bfad_s *bfad = im_port->bfad;
struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
struct bfad_itnim_s *itnim;
struct bfa_ioim_s *hal_io;
unsigned long flags;
int rc;
int sg_cnt = 0;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
rc = fc_remote_port_chkready(rport);
if (rc) {
cmnd->result = rc;
done(cmnd);
return 0;
}
if (bfad->bfad_flags & BFAD_EEH_BUSY) {
if (bfad->bfad_flags & BFAD_EEH_PCI_CHANNEL_IO_PERM_FAILURE)
cmnd->result = DID_NO_CONNECT << 16;
else
cmnd->result = DID_REQUEUE << 16;
done(cmnd);
return 0;
}
sg_cnt = scsi_dma_map(cmnd);
if (sg_cnt < 0)
return SCSI_MLQUEUE_HOST_BUSY;
cmnd->scsi_done = done;
spin_lock_irqsave(&bfad->bfad_lock, flags);
if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
printk(KERN_WARNING
"bfad%d, queuecommand %p %x failed, BFA stopped\n",
bfad->inst_no, cmnd, cmnd->cmnd[0]);
cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
goto out_fail_cmd;
}
itnim = itnim_data->itnim;
if (!itnim) {
cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
goto out_fail_cmd;
}
hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
itnim->bfa_itnim, sg_cnt);
if (!hal_io) {
printk(KERN_WARNING "hal_io failure\n");
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
scsi_dma_unmap(cmnd);
return SCSI_MLQUEUE_HOST_BUSY;
}
cmnd->host_scribble = (char *)hal_io;
bfa_ioim_start(hal_io);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
return 0;
out_fail_cmd:
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
scsi_dma_unmap(cmnd);
if (done)
done(cmnd);
return 0;
}
static DEF_SCSI_QCMD(bfad_im_queuecommand)
void
bfad_rport_online_wait(struct bfad_s *bfad)
{
int i;
int rport_delay = 10;
for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
&& i < bfa_linkup_delay; i++) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ);
}
if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
rport_delay = rport_delay < bfa_linkup_delay ?
rport_delay : bfa_linkup_delay;
for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
&& i < rport_delay; i++) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ);
}
if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(rport_delay * HZ);
}
}
}
int
bfad_get_linkup_delay(struct bfad_s *bfad)
{
u8 nwwns = 0;
wwn_t wwns[BFA_PREBOOT_BOOTLUN_MAX];
int linkup_delay;
/*
* Querying for the boot target port wwns
* -- read from boot information in flash.
* If nwwns > 0 => boot over SAN and set linkup_delay = 30
* else => local boot machine set linkup_delay = 0
*/
bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
if (nwwns > 0)
/* If Boot over SAN set linkup_delay = 30sec */
linkup_delay = 30;
else
/* If local boot; no linkup_delay */
linkup_delay = 0;
return linkup_delay;
}