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提交 f4f051eb 编写于 作者: 提交者： James Bottomley
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[PATCH] qla2xxx: remove internal queuing... 

Remove internal command queuing from the driver.  As is, this
driver cannot tolerate cable-pulls as I/Os will begin to fail
by the upper layers.

     o Should be used in conjuction with the
       11-fc_rport_adds_2.diff patch.
     o Removes qla_listops.h file -- no longer needed.
Signed-off-by: NAndrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>
上级 c46f2ffb
隐藏空白更改
内联 并排
Showing with 298 addition and 2305 deletion
drivers/scsi/qla2xxx/qla_def.h
浏览文件 @ f4f051eb
......@@ -2175,27 +2175,6 @@ typedef struct scsi_qla_host {
uint32_t current_outstanding_cmd;
srb_t *status_srb; /* Status continuation entry. */
/*
* Need to hold the list_lock with irq's disabled in order to access
* the following list.
*
* This list_lock is of lower priority than the host_lock.
*/
spinlock_t list_lock ____cacheline_aligned;
/* lock to guard lists which
* hold srb_t's */
struct list_head retry_queue; /* watchdog queue */
struct list_head done_queue; /* job on done queue */
struct list_head failover_queue; /* failover list link. */
struct list_head scsi_retry_queue; /* SCSI retry queue */
struct list_head pending_queue; /* SCSI command pending queue */
unsigned long done_q_cnt;
unsigned long pending_in_q;
uint32_t retry_q_cnt;
uint32_t scsi_retry_q_cnt;
uint32_t failover_cnt;
unsigned long last_irq_cpu; /* cpu where we got our last irq */
uint16_t revision;
......@@ -2479,7 +2458,6 @@ struct _qla2x00stats {
#include "qla_gbl.h"
#include "qla_dbg.h"
#include "qla_inline.h"
#include "qla_listops.h"
/*
* String arrays
......
drivers/scsi/qla2xxx/qla_gbl.h
浏览文件 @ f4f051eb
......@@ -74,6 +74,7 @@ extern int ql2xsuspendcount;
#if defined(MODULE)
extern char *ql2xopts;
#endif
extern void qla2x00_sp_compl(scsi_qla_host_t *, srb_t *);
extern char *qla2x00_get_fw_version_str(struct scsi_qla_host *, char *);
......@@ -82,17 +83,12 @@ extern void qla2x00_cmd_timeout(srb_t *);
extern int __qla2x00_suspend_lun(scsi_qla_host_t *, os_lun_t *, int, int, int);
extern void qla2x00_done(scsi_qla_host_t *);
extern void qla2x00_next(scsi_qla_host_t *);
extern void qla2x00_flush_failover_q(scsi_qla_host_t *, os_lun_t *);
extern void qla2x00_reset_lun_fo_counts(scsi_qla_host_t *, os_lun_t *);
extern void qla2x00_extend_timeout(struct scsi_cmnd *, int);
extern void qla2x00_mark_device_lost(scsi_qla_host_t *, fc_port_t *, int);
extern void qla2x00_mark_all_devices_lost(scsi_qla_host_t *);
extern void qla2x00_abort_queues(scsi_qla_host_t *, uint8_t);
extern void qla2x00_blink_led(scsi_qla_host_t *);
extern int qla2x00_down_timeout(struct semaphore *, unsigned long);
......
drivers/scsi/qla2xxx/qla_init.c
浏览文件 @ f4f051eb
......@@ -3146,7 +3146,6 @@ qla2x00_loop_resync(scsi_qla_host_t *ha)
wait_time &&
(test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)));
}
qla2x00_restart_queues(ha, 1);
}
if (test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
......@@ -3160,87 +3159,6 @@ qla2x00_loop_resync(scsi_qla_host_t *ha)
return (rval);
}
/*
* qla2x00_restart_queues
* Restart device queues.
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Kernel/Interrupt context.
*/
void
qla2x00_restart_queues(scsi_qla_host_t *ha, uint8_t flush)
{
srb_t *sp;
int retry_q_cnt = 0;
int pending_q_cnt = 0;
struct list_head *list, *temp;
unsigned long flags = 0;
clear_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
/* start pending queue */
pending_q_cnt = ha->qthreads;
if (flush) {
spin_lock_irqsave(&ha->list_lock,flags);
list_for_each_safe(list, temp, &ha->pending_queue) {
sp = list_entry(list, srb_t, list);
if ((sp->flags & SRB_TAPE))
continue;
/*
* When time expire return request back to OS as BUSY
*/
__del_from_pending_queue(ha, sp);
sp->cmd->result = DID_BUS_BUSY << 16;
sp->cmd->host_scribble = (unsigned char *)NULL;
__add_to_done_queue(ha, sp);
}
spin_unlock_irqrestore(&ha->list_lock, flags);
} else {
if (!list_empty(&ha->pending_queue))
qla2x00_next(ha);
}
/*
* Clear out our retry queue
*/
if (flush) {
spin_lock_irqsave(&ha->list_lock, flags);
retry_q_cnt = ha->retry_q_cnt;
list_for_each_safe(list, temp, &ha->retry_queue) {
sp = list_entry(list, srb_t, list);
/* when time expire return request back to OS as BUSY */
__del_from_retry_queue(ha, sp);
sp->cmd->result = DID_BUS_BUSY << 16;
sp->cmd->host_scribble = (unsigned char *)NULL;
__add_to_done_queue(ha, sp);
}
spin_unlock_irqrestore(&ha->list_lock, flags);
DEBUG2(printk("%s(%ld): callback %d commands.\n",
__func__,
ha->host_no,
retry_q_cnt);)
}
DEBUG2(printk("%s(%ld): active=%ld, retry=%d, pending=%d, "
"done=%ld, scsi retry=%d commands.\n",
__func__,
ha->host_no,
ha->actthreads,
ha->retry_q_cnt,
pending_q_cnt,
ha->done_q_cnt,
ha->scsi_retry_q_cnt);)
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
}
void
qla2x00_rescan_fcports(scsi_qla_host_t *ha)
{
......@@ -3699,24 +3617,10 @@ qla2x00_abort_isp(scsi_qla_host_t *ha)
ha->actthreads--;
sp->lun_queue->out_cnt--;
/*
* Set the cmd host_byte status depending on
* whether the scsi_error_handler is
* active or not.
*/
if (sp->flags & SRB_TAPE) {
sp->cmd->result = DID_NO_CONNECT << 16;
} else {
if (ha->host->eh_active != EH_ACTIVE)
sp->cmd->result =
DID_BUS_BUSY << 16;
else
sp->cmd->result =
DID_RESET << 16;
}
sp->flags = 0;
sp->cmd->result = DID_RESET << 16;
sp->cmd->host_scribble = (unsigned char *)NULL;
add_to_done_queue(ha, sp);
qla2x00_sp_compl(ha, sp);
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
......@@ -3739,11 +3643,6 @@ qla2x00_abort_isp(scsi_qla_host_t *ha)
/* Enable ISP interrupts. */
qla2x00_enable_intrs(ha);
/* v2.19.5b6 Return all commands */
qla2x00_abort_queues(ha, 1);
/* Restart queues that may have been stopped. */
qla2x00_restart_queues(ha, 1);
ha->isp_abort_cnt = 0;
clear_bit(ISP_ABORT_RETRY, &ha->dpc_flags);
} else { /* failed the ISP abort */
......@@ -3758,7 +3657,6 @@ qla2x00_abort_isp(scsi_qla_host_t *ha)
* completely.
*/
qla2x00_reset_adapter(ha);
qla2x00_abort_queues(ha, 0);
ha->flags.online = 0;
clear_bit(ISP_ABORT_RETRY,
&ha->dpc_flags);
......
drivers/scsi/qla2xxx/qla_iocb.c
浏览文件 @ f4f051eb
......@@ -334,7 +334,6 @@ qla2x00_start_scsi(srb_t *sp)
uint32_t index;
uint32_t handle;
cmd_entry_t *cmd_pkt;
uint32_t timeout;
struct scatterlist *sg;
uint16_t cnt;
uint16_t req_cnt;
......@@ -433,18 +432,6 @@ qla2x00_start_scsi(srb_t *sp)
}
}
/*
* Allocate at least 5 (+ QLA_CMD_TIMER_DELTA) seconds for RISC timeout.
*/
timeout = (uint32_t)(cmd->timeout_per_command / HZ);
if (timeout > 65535)
cmd_pkt->timeout = __constant_cpu_to_le16(0);
else if (timeout > 25)
cmd_pkt->timeout = cpu_to_le16((uint16_t)timeout -
(5 + QLA_CMD_TIMER_DELTA));
else
cmd_pkt->timeout = cpu_to_le16((uint16_t)timeout);
/* Load SCSI command packet. */
memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);
......
drivers/scsi/qla2xxx/qla_isr.c
浏览文件 @ f4f051eb
......@@ -27,8 +27,6 @@ static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
static int qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *);
/**
* qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
* @irq:
......@@ -93,7 +91,6 @@ qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_next(ha);
ha->last_irq_cpu = _smp_processor_id();
ha->total_isr_cnt++;
......@@ -107,9 +104,6 @@ qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
return (IRQ_HANDLED);
}
......@@ -206,7 +200,6 @@ qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_next(ha);
ha->last_irq_cpu = _smp_processor_id();
ha->total_isr_cnt++;
......@@ -220,9 +213,6 @@ qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
return (IRQ_HANDLED);
}
......@@ -714,7 +704,7 @@ qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
/* Save ISP completion status */
sp->cmd->result = DID_OK << 16;
sp->fo_retry_cnt = 0;
add_to_done_queue(ha, sp);
qla2x00_sp_compl(ha, sp);
} else {
DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
ha->host_no));
......@@ -914,24 +904,6 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
tq = sp->tgt_queue;
lq = sp->lun_queue;
/*
* If loop is in transient state Report DID_BUS_BUSY
*/
if ((comp_status != CS_COMPLETE || scsi_status != 0)) {
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
(atomic_read(&ha->loop_down_timer) ||
atomic_read(&ha->loop_state) != LOOP_READY)) {
DEBUG2(printk("scsi(%ld:%d:%d:%d): Loop Not Ready - "
"pid=%lx.\n",
ha->host_no, b, t, l, cp->serial_number));
qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
add_to_retry_queue(ha, sp);
return;
}
}
/* Check for any FCP transport errors. */
if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
rsp_info_len = le16_to_cpu(pkt->rsp_info_len);
......@@ -945,7 +917,7 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
pkt->rsp_info[6], pkt->rsp_info[7]));
cp->result = DID_BUS_BUSY << 16;
add_to_done_queue(ha, sp);
qla2x00_sp_compl(ha, sp);
return;
}
}
......@@ -964,11 +936,6 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
cp->resid = resid;
CMD_RESID_LEN(cp) = resid;
}
if (lscsi_status == SS_BUSY_CONDITION) {
cp->result = DID_BUS_BUSY << 16 | lscsi_status;
break;
}
cp->result = DID_OK << 16 | lscsi_status;
if (lscsi_status != SS_CHECK_CONDITION)
......@@ -1002,14 +969,6 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
if (sp->request_sense_length != 0)
ha->status_srb = sp;
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
qla2x00_check_sense(cp, lq) == QLA_SUCCESS) {
/* Throw away status_cont if any */
ha->status_srb = NULL;
add_to_scsi_retry_queue(ha, sp);
return;
}
DEBUG5(printk("%s(): Check condition Sense data, "
"scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
__func__, ha->host_no, b, t, l, cp,
......@@ -1035,12 +994,6 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
* Status.
*/
if (lscsi_status != 0) {
if (lscsi_status == SS_BUSY_CONDITION) {
cp->result = DID_BUS_BUSY << 16 |
lscsi_status;
break;
}
cp->result = DID_OK << 16 | lscsi_status;
if (lscsi_status != SS_CHECK_CONDITION)
......@@ -1072,12 +1025,6 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
if (sp->request_sense_length != 0)
ha->status_srb = sp;
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
(qla2x00_check_sense(cp, lq) == QLA_SUCCESS)) {
ha->status_srb = NULL;
add_to_scsi_retry_queue(ha, sp);
return;
}
DEBUG5(printk("%s(): Check condition Sense data, "
"scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
__func__, ha->host_no, b, t, l, cp,
......@@ -1155,24 +1102,10 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
ha->host_no, t, l, cp->serial_number, comp_status,
atomic_read(&fcport->state)));
if ((sp->flags & (SRB_IOCTL | SRB_TAPE)) ||
atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
cp->result = DID_NO_CONNECT << 16;
if (atomic_read(&ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
add_to_done_queue(ha, sp);
} else {
qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
add_to_retry_queue(ha, sp);
}
cp->result = DID_BUS_BUSY << 16;
if (atomic_read(&fcport->state) == FCS_ONLINE) {
qla2x00_mark_device_lost(ha, fcport, 1);
}
return;
break;
case CS_RESET:
......@@ -1180,13 +1113,7 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
"scsi(%ld): RESET status detected 0x%x-0x%x.\n",
ha->host_no, comp_status, scsi_status));
if (sp->flags & (SRB_IOCTL | SRB_TAPE)) {
cp->result = DID_RESET << 16;
} else {
qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
add_to_retry_queue(ha, sp);
return;
}
cp->result = DID_RESET << 16;
break;
case CS_ABORTED:
......@@ -1253,7 +1180,7 @@ qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
/* Place command on done queue. */
if (ha->status_srb == NULL)
add_to_done_queue(ha, sp);
qla2x00_sp_compl(ha, sp);
}
/**
......@@ -1298,8 +1225,8 @@ qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
/* Place command on done queue. */
if (sp->request_sense_length == 0) {
add_to_done_queue(ha, sp);
ha->status_srb = NULL;
qla2x00_sp_compl(ha, sp);
}
}
}
......@@ -1353,8 +1280,7 @@ qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
} else {
sp->cmd->result = DID_ERROR << 16;
}
/* Place command on done queue. */
add_to_done_queue(ha, sp);
qla2x00_sp_compl(ha, sp);
} else if (pkt->entry_type == COMMAND_A64_TYPE ||
pkt->entry_type == COMMAND_TYPE) {
......@@ -1403,62 +1329,5 @@ qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
/* Free outstanding command slot. */
ha->outstanding_cmds[pkt->handle1] = NULL;
add_to_done_queue(ha, sp);
}
/**
* qla2x00_check_sense() - Perform any sense data interrogation.
* @cp: SCSI Command
* @lq: Lun queue
*
* Returns QLA_SUCCESS if the lun queue is suspended, else
* QLA_FUNCTION_FAILED (lun queue not suspended).
*/
static int
qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *lq)
{
scsi_qla_host_t *ha;
srb_t *sp;
fc_port_t *fcport;
ha = (scsi_qla_host_t *) cp->device->host->hostdata;
if ((cp->sense_buffer[0] & 0x70) != 0x70) {
return (QLA_FUNCTION_FAILED);
}
sp = (srb_t * )CMD_SP(cp);
sp->flags |= SRB_GOT_SENSE;
switch (cp->sense_buffer[2] & 0xf) {
case RECOVERED_ERROR:
cp->result = DID_OK << 16;
cp->sense_buffer[0] = 0;
break;
case NOT_READY:
fcport = lq->fclun->fcport;
/*
* Suspend the lun only for hard disk device type.
*/
if ((fcport->flags & FCF_TAPE_PRESENT) == 0 &&
lq->q_state != LUN_STATE_TIMEOUT) {
/*
* If target is in process of being ready then suspend
* lun for 6 secs and retry all the commands.
*/
if (cp->sense_buffer[12] == 0x4 &&
cp->sense_buffer[13] == 0x1) {
/* Suspend the lun for 6 secs */
qla2x00_suspend_lun(ha, lq, 6,
ql2xsuspendcount);
return (QLA_SUCCESS);
}
}
break;
}
return (QLA_FUNCTION_FAILED);
qla2x00_sp_compl(ha, sp);
}
drivers/scsi/qla2xxx/qla_listops.h 已删除 100644 → 0
浏览文件 @ c46f2ffb
/******************************************************************************
* QLOGIC LINUX SOFTWARE
*
* QLogic ISP2x00 device driver for Linux 2.6.x
* Copyright (C) 2003-2004 QLogic Corporation
* (www.qlogic.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* 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.
*
******************************************************************************/
/* Management functions for various lists */
/* __add_to_done_queue()
*
* Place SRB command on done queue.
*
* Input:
* ha = host pointer
* sp = srb pointer.
* Locking:
* this function assumes the ha->list_lock is already taken
*/
static inline void
__add_to_done_queue(struct scsi_qla_host * ha, srb_t * sp)
{
/*
if (sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
/* Place block on done queue */
sp->cmd->host_scribble = (unsigned char *) NULL;
sp->state = SRB_DONE_STATE;
list_add_tail(&sp->list,&ha->done_queue);
ha->done_q_cnt++;
sp->ha = ha;
}
static inline void
__add_to_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
/*
if( sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
/* Place block on retry queue */
list_add_tail(&sp->list,&ha->retry_queue);
ha->retry_q_cnt++;
sp->flags |= SRB_WATCHDOG;
sp->state = SRB_RETRY_STATE;
sp->ha = ha;
}
static inline void
__add_to_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
/*
if( sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
/* Place block on retry queue */
list_add_tail(&sp->list,&ha->scsi_retry_queue);
ha->scsi_retry_q_cnt++;
sp->state = SRB_SCSI_RETRY_STATE;
sp->ha = ha;
}
static inline void
add_to_done_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__add_to_done_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
static inline void
add_to_free_queue(struct scsi_qla_host * ha, srb_t * sp)
{
mempool_free(sp, ha->srb_mempool);
}
static inline void
add_to_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__add_to_retry_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
static inline void
add_to_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__add_to_scsi_retry_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
/*
* __del_from_retry_queue
* Function used to remove a command block from the
* watchdog timer queue.
*
* Note: Must insure that command is on watchdog
* list before calling del_from_retry_queue
* if (sp->flags & SRB_WATCHDOG)
*
* Input:
* ha = adapter block pointer.
* sp = srb pointer.
* Locking:
* this function assumes the list_lock is already taken
*/
static inline void
__del_from_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
list_del_init(&sp->list);
sp->flags &= ~(SRB_WATCHDOG | SRB_BUSY);
sp->state = SRB_NO_QUEUE_STATE;
ha->retry_q_cnt--;
}
/*
* __del_from_scsi_retry_queue
* Function used to remove a command block from the
* scsi retry queue.
*
* Input:
* ha = adapter block pointer.
* sp = srb pointer.
* Locking:
* this function assumes the list_lock is already taken
*/
static inline void
__del_from_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
list_del_init(&sp->list);
ha->scsi_retry_q_cnt--;
sp->state = SRB_NO_QUEUE_STATE;
}
/*
* del_from_retry_queue
* Function used to remove a command block from the
* watchdog timer queue.
*
* Note: Must insure that command is on watchdog
* list before calling del_from_retry_queue
* if (sp->flags & SRB_WATCHDOG)
*
* Input:
* ha = adapter block pointer.
* sp = srb pointer.
* Locking:
* this function takes and releases the list_lock
*/
static inline void
del_from_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
/* if (unlikely(!(sp->flags & SRB_WATCHDOG)))
BUG();*/
spin_lock_irqsave(&ha->list_lock, flags);
/* if (unlikely(list_empty(&ha->retry_queue)))
BUG();*/
__del_from_retry_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
/*
* del_from_scsi_retry_queue
* Function used to remove a command block from the
* scsi retry queue.
*
* Input:
* ha = adapter block pointer.
* sp = srb pointer.
* Locking:
* this function takes and releases the list_lock
*/
static inline void
del_from_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
/* if (unlikely(list_empty(&ha->scsi_retry_queue)))
BUG();*/
__del_from_scsi_retry_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
/*
* __add_to_pending_queue
* Add the standard SCB job to the bottom of standard SCB commands.
*
* Input:
* COMPLETE!!!
* q = SCSI LU pointer.
* sp = srb pointer.
* SCSI_LU_Q lock must be already obtained.
*/
static inline int
__add_to_pending_queue(struct scsi_qla_host *ha, srb_t * sp)
{
int empty;
/*
if( sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_FREE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
empty = list_empty(&ha->pending_queue);
list_add_tail(&sp->list, &ha->pending_queue);
ha->qthreads++;
sp->state = SRB_PENDING_STATE;
return (empty);
}
static inline void
__add_to_pending_queue_head(struct scsi_qla_host *ha, srb_t * sp)
{
/*
if( sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_FREE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
list_add(&sp->list, &ha->pending_queue);
ha->qthreads++;
sp->state = SRB_PENDING_STATE;
}
static inline int
add_to_pending_queue(struct scsi_qla_host *ha, srb_t *sp)
{
int empty;
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
empty = __add_to_pending_queue(ha, sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
return (empty);
}
static inline void
add_to_pending_queue_head(struct scsi_qla_host *ha, srb_t *sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__add_to_pending_queue_head(ha, sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
static inline void
__del_from_pending_queue(struct scsi_qla_host *ha, srb_t *sp)
{
list_del_init(&sp->list);
ha->qthreads--;
sp->state = SRB_NO_QUEUE_STATE;
}
/*
* Failover Stuff.
*/
static inline void
__add_to_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
{
/*
if( sp->state != SRB_NO_QUEUE_STATE &&
sp->state != SRB_ACTIVE_STATE)
BUG();
*/
list_add_tail(&sp->list,&ha->failover_queue);
ha->failover_cnt++;
sp->state = SRB_FAILOVER_STATE;
sp->ha = ha;
}
static inline void add_to_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__add_to_failover_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
static inline void __del_from_failover_queue(struct scsi_qla_host * ha, srb_t *
sp)
{
ha->failover_cnt--;
list_del_init(&sp->list);
sp->state = SRB_NO_QUEUE_STATE;
}
static inline void del_from_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__del_from_failover_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
static inline void
del_from_pending_queue(struct scsi_qla_host * ha, srb_t * sp)
{
unsigned long flags;
spin_lock_irqsave(&ha->list_lock, flags);
__del_from_pending_queue(ha,sp);
spin_unlock_irqrestore(&ha->list_lock, flags);
}
drivers/scsi/qla2xxx/qla_os.c
浏览文件 @ f4f051eb
......@@ -151,6 +151,8 @@ static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
* SCSI host template entry points
*/
static int qla2xxx_slave_configure(struct scsi_device * device);
static int qla2xxx_slave_alloc(struct scsi_device *);
static void qla2xxx_slave_destroy(struct scsi_device *);
static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
void (*fn)(struct scsi_cmnd *));
static int qla2xxx_eh_abort(struct scsi_cmnd *);
......@@ -177,6 +179,8 @@ static struct scsi_host_template qla2x00_driver_template = {
.slave_configure = qla2xxx_slave_configure,
.slave_alloc = qla2xxx_slave_alloc,
.slave_destroy = qla2xxx_slave_destroy,
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
......@@ -230,168 +234,6 @@ qla2x00_stop_timer(scsi_qla_host_t *ha)
ha->timer_active = 0;
}
void qla2x00_cmd_timeout(srb_t *);
static __inline__ void qla2x00_callback(scsi_qla_host_t *, struct scsi_cmnd *);
static __inline__ void sp_put(struct scsi_qla_host * ha, srb_t *sp);
static __inline__ void sp_get(struct scsi_qla_host * ha, srb_t *sp);
static __inline__ void
qla2x00_delete_from_done_queue(scsi_qla_host_t *, srb_t *);
/*
* qla2x00_callback
* Returns the completed SCSI command to LINUX.
*
* Input:
* ha -- Host adapter structure
* cmd -- SCSI mid-level command structure.
* Returns:
* None
* Note:From failover point of view we always get the sp
* from vis_ha pool in queuecommand.So when we put it
* back to the pool it has to be the vis_ha.
* So rely on struct scsi_cmnd to get the vis_ha and not on sp.
*/
static inline void
qla2x00_callback(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
srb_t *sp = (srb_t *) CMD_SP(cmd);
scsi_qla_host_t *vis_ha;
os_lun_t *lq;
int got_sense;
unsigned long cpu_flags = 0;
cmd->host_scribble = (unsigned char *) NULL;
vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
if (sp == NULL) {
qla_printk(KERN_INFO, ha,
"%s(): **** CMD derives a NULL SP\n",
__func__);
DEBUG2(BUG();)
return;
}
/*
* If command status is not DID_BUS_BUSY then go ahead and freed sp.
*/
/*
* Cancel command timeout
*/
qla2x00_delete_timer_from_cmd(sp);
/*
* Put SP back in the free queue
*/
sp->cmd = NULL;
CMD_SP(cmd) = NULL;
lq = sp->lun_queue;
got_sense = (sp->flags & SRB_GOT_SENSE)? 1: 0;
add_to_free_queue(vis_ha, sp);
if (host_byte(cmd->result) == DID_OK) {
/* device ok */
ha->total_bytes += cmd->bufflen;
if (!got_sense) {
/* If lun was suspended then clear retry count */
spin_lock_irqsave(&lq->q_lock, cpu_flags);
if (!test_bit(LUN_EXEC_DELAYED, &lq->q_flag))
lq->q_state = LUN_STATE_READY;
spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
}
} else if (host_byte(cmd->result) == DID_ERROR) {
/* device error */
ha->total_dev_errs++;
}
/* Call the mid-level driver interrupt handler */
(*(cmd)->scsi_done)(cmd);
}
/**************************************************************************
* sp_put
*
* Description:
* Decrement reference count and call the callback if we're the last
* owner of the specified sp. Will get the host_lock before calling
* the callback.
*
* Input:
* ha - pointer to the scsi_qla_host_t where the callback is to occur.
* sp - pointer to srb_t structure to use.
*
* Returns:
*
**************************************************************************/
static inline void
sp_put(struct scsi_qla_host * ha, srb_t *sp)
{
if (atomic_read(&sp->ref_count) == 0) {
qla_printk(KERN_INFO, ha,
"%s(): **** SP->ref_count not zero\n",
__func__);
DEBUG2(BUG();)
return;
}
if (!atomic_dec_and_test(&sp->ref_count)) {
return;
}
qla2x00_callback(ha, sp->cmd);
}
/**************************************************************************
* sp_get
*
* Description:
* Increment reference count of the specified sp.
*
* Input:
* sp - pointer to srb_t structure to use.
*
* Returns:
*
**************************************************************************/
static inline void
sp_get(struct scsi_qla_host * ha, srb_t *sp)
{
atomic_inc(&sp->ref_count);
if (atomic_read(&sp->ref_count) > 2) {
qla_printk(KERN_INFO, ha,
"%s(): **** SP->ref_count greater than two\n",
__func__);
DEBUG2(BUG();)
return;
}
}
static inline void
qla2x00_delete_from_done_queue(scsi_qla_host_t *dest_ha, srb_t *sp)
{
/* remove command from done list */
list_del_init(&sp->list);
dest_ha->done_q_cnt--;
sp->state = SRB_NO_QUEUE_STATE;
if (sp->flags & SRB_DMA_VALID) {
sp->flags &= ~SRB_DMA_VALID;
/* Release memory used for this I/O */
if (sp->cmd->use_sg) {
pci_unmap_sg(dest_ha->pdev, sp->cmd->request_buffer,
sp->cmd->use_sg, sp->cmd->sc_data_direction);
} else if (sp->cmd->request_bufflen) {
pci_unmap_page(dest_ha->pdev, sp->dma_handle,
sp->cmd->request_bufflen,
sp->cmd->sc_data_direction);
}
}
}
static int qla2x00_do_dpc(void *data);
static void qla2x00_rst_aen(scsi_qla_host_t *);
......@@ -400,7 +242,9 @@ static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
static void qla2x00_mem_free(scsi_qla_host_t *ha);
static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *ha);
static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
static ssize_t qla2x00_sysfs_read_fw_dump(struct kobject *, char *, loff_t,
size_t);
......@@ -661,210 +505,84 @@ qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
* handling).
**************************************************************************/
static int
qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*fn)(struct scsi_cmnd *))
qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
fc_port_t *fcport;
os_lun_t *lq;
os_tgt_t *tq;
scsi_qla_host_t *ha, *ha2;
srb_t *sp;
struct Scsi_Host *host;
unsigned int b, t, l;
unsigned long handle;
int was_empty;
scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
os_tgt_t *tq = (os_tgt_t *) cmd->device->hostdata;
fc_port_t *fcport = tq->fcport;
os_lun_t *lq;
srb_t *sp;
int rval;
host = cmd->device->host;
ha = (scsi_qla_host_t *) host->hostdata;
was_empty = 1;
lq = GET_LU_Q(ha, cmd->device->id, cmd->device->lun);
if (!fcport || !lq) {
cmd->result = DID_NO_CONNECT << 16;
goto qc_fail_command;
}
cmd->scsi_done = fn;
if (atomic_read(&fcport->state) != FCS_ONLINE) {
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
atomic_read(&ha->loop_state) == LOOP_DEAD) {
cmd->result = DID_NO_CONNECT << 16;
goto qc_fail_command;
}
goto qc_host_busy;
}
spin_unlock_irq(ha->host->host_lock);
/*
* Allocate a command packet from the "sp" pool. If we cant get back
* one then let scsi layer come back later.
*/
/* Allocate a command packet from the "sp" pool. */
if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
qla_printk(KERN_WARNING, ha,
"Couldn't allocate memory for sp - retried.\n");
spin_lock_irq(ha->host->host_lock);
return (1);
goto qc_host_busy_lock;
}
sp->ha = ha;
sp->cmd = cmd;
CMD_SP(cmd) = (void *)sp;
sp->flags = 0;
if (CMD_RESID_LEN(cmd) & SRB_IOCTL) {
/* Need to set sp->flags */
sp->flags |= SRB_IOCTL;
CMD_RESID_LEN(cmd) = 0; /* Clear it since no more use. */
}
sp->fo_retry_cnt = 0;
sp->err_id = 0;
/* Generate LU queue on bus, target, LUN */
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
/*
* Start Command Timer. Typically it will be 2 seconds less than what
* is requested by the Host such that we can return the IO before
* aborts are called.
*/
if ((cmd->timeout_per_command / HZ) > QLA_CMD_TIMER_DELTA)
qla2x00_add_timer_to_cmd(sp,
(cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
else
qla2x00_add_timer_to_cmd(sp, cmd->timeout_per_command / HZ);
if (l >= ha->max_luns) {
cmd->result = DID_NO_CONNECT << 16;
sp->err_id = SRB_ERR_PORT;
spin_lock_irq(ha->host->host_lock);
sp_put(ha, sp);
return (0);
}
if ((tq = (os_tgt_t *) TGT_Q(ha, t)) != NULL &&
(lq = (os_lun_t *) LUN_Q(ha, t, l)) != NULL) {
fcport = lq->fclun->fcport;
ha2 = fcport->ha;
} else {
lq = NULL;
fcport = NULL;
ha2 = ha;
}
/* Set an invalid handle until we issue the command to ISP */
/* then we will set the real handle value. */
handle = INVALID_HANDLE;
cmd->host_scribble = (unsigned char *)handle;
/* Bookkeeping information */
sp->r_start = jiffies; /* Time the request was recieved. */
sp->u_start = 0;
/* Setup device queue pointers. */
sp->tgt_queue = tq;
sp->lun_queue = lq;
/*
* NOTE : q is NULL
*
* 1. When device is added from persistent binding but has not been
* discovered yet.The state of loopid == PORT_AVAIL.
* 2. When device is never found on the bus.(loopid == UNUSED)
*
* IF Device Queue is not created, or device is not in a valid state
* and link down error reporting is enabled, reject IO.
*/
if (fcport == NULL) {
DEBUG3(printk("scsi(%ld:%2d:%2d): port unavailable\n",
ha->host_no,t,l));
cmd->result = DID_NO_CONNECT << 16;
sp->err_id = SRB_ERR_PORT;
spin_lock_irq(ha->host->host_lock);
sp_put(ha, sp);
return (0);
}
sp->lun_queue = lq;
lq->io_cnt++;
sp->fclun = lq->fclun;
/* Only modify the allowed count if the target is a *non* tape device */
if ((fcport->flags & FCF_TAPE_PRESENT) == 0) {
sp->flags &= ~SRB_TAPE;
if (cmd->allowed < ql2xretrycount) {
cmd->allowed = ql2xretrycount;
}
} else
sp->flags |= SRB_TAPE;
sp->flags = 0;
sp->err_id = 0;
DEBUG5(printk("scsi(%ld:%2d:%2d): (queuecmd) queue sp = %p, "
"flags=0x%x fo retry=%d, pid=%ld\n",
ha->host_no, t, l, sp, sp->flags, sp->fo_retry_cnt,
cmd->serial_number));
DEBUG5(qla2x00_print_scsi_cmd(cmd));
CMD_SP(cmd) = (void *)sp;
cmd->scsi_done = done;
sp->fclun = lq->fclun;
sp->ha = ha2;
rval = qla2x00_start_scsi(sp);
if (rval != QLA_SUCCESS)
goto qc_host_busy_free_sp;
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL &&
cmd->request_bufflen != 0) {
/* Manage unprocessed RIO/ZIO commands in response queue. */
if (ha->flags.online && ha->flags.process_response_queue &&
ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
unsigned long flags;
DEBUG2(printk(KERN_WARNING
"scsi(%ld): Incorrect data direction - transfer "
"length=%d, direction=%d, pid=%ld, opcode=%x\n",
ha->host_no, cmd->request_bufflen, cmd->sc_data_direction,
cmd->serial_number, cmd->cmnd[0]));
spin_lock_irqsave(&ha->hardware_lock, flags);
qla2x00_process_response_queue(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
/* Final pre-check :
*
* Either PORT_DOWN_TIMER OR LINK_DOWN_TIMER Expired.
*/
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
atomic_read(&ha2->loop_state) == LOOP_DEAD) {
/*
* Add the command to the done-queue for later failover
* processing.
*/
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&ha2->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
spin_lock_irq(ha->host->host_lock);
add_to_done_queue(ha, sp);
qla2x00_done(ha);
return 0;
spin_lock_irq(ha->host->host_lock);
return (0);
}
qc_host_busy_free_sp:
qla2x00_sp_free_dma(ha, sp);
CMD_SP(cmd) = NULL;
mempool_free(sp, ha->srb_mempool);
if (tq && test_bit(TQF_SUSPENDED, &tq->flags) &&
(sp->flags & SRB_TAPE) == 0) {
/* If target suspended put incoming I/O in retry_q. */
qla2x00_extend_timeout(sp->cmd, 10);
add_to_scsi_retry_queue(ha, sp);
} else
was_empty = add_to_pending_queue(ha, sp);
if ((IS_QLA2100(ha) || IS_QLA2200(ha)) && ha->flags.online) {
if (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
qla2x00_process_response_queue(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
}
qc_host_busy_lock:
spin_lock_irq(ha->host->host_lock);
/* We submit to the hardware if:
*
* 1) we're on the cpu the irq's arrive on or
* 2) there are very few io's outstanding.
*
* In all other cases we'll let an irq pick up our IO and submit it
* to the controller to improve affinity.
*/
if (_smp_processor_id() == ha->last_irq_cpu || was_empty)
qla2x00_next(ha);
qc_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
spin_lock_irq(ha->host->host_lock);
qc_fail_command:
done(cmd);
return (0);
return 0;
}
/*
......@@ -886,54 +604,21 @@ static int
qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
#define ABORT_POLLING_PERIOD HZ
#define ABORT_WAIT_TIME ((10 * HZ) / (ABORT_POLLING_PERIOD))
int found = 0;
int done = 0;
srb_t *rp = NULL;
struct list_head *list, *temp;
u_long max_wait_time = ABORT_WAIT_TIME;
do {
/* Check on done queue */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->done_queue) {
rp = list_entry(list, srb_t, list);
/*
* Found command. Just exit and wait for the cmd sent
* to OS.
*/
if (cmd == rp->cmd) {
found++;
DEBUG3(printk("%s: found in done queue.\n",
__func__);)
break;
}
}
spin_unlock(&ha->list_lock);
/* Complete the cmd right away. */
if (found) {
qla2x00_delete_from_done_queue(ha, rp);
sp_put(ha, rp);
done++;
break;
}
spin_unlock_irq(ha->host->host_lock);
#define ABORT_WAIT_ITER ((10 * HZ) / (ABORT_POLLING_PERIOD))
unsigned long wait_iter = ABORT_WAIT_ITER;
int ret = QLA_SUCCESS;
while (CMD_SP(cmd)) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(ABORT_POLLING_PERIOD);
spin_lock_irq(ha->host->host_lock);
} while ((max_wait_time--));
if (done)
DEBUG2(printk(KERN_INFO "%s: found cmd=%p.\n", __func__, cmd));
if (--wait_iter)
break;
}
if (CMD_SP(cmd))
ret = QLA_FUNCTION_FAILED;
return (done);
return ret;
}
/*
......@@ -1032,274 +717,98 @@ qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
int
qla2xxx_eh_abort(struct scsi_cmnd *cmd)
{
int i;
int return_status = FAILED;
os_lun_t *q;
scsi_qla_host_t *ha;
scsi_qla_host_t *vis_ha;
srb_t *sp;
srb_t *rp;
struct list_head *list, *temp;
struct Scsi_Host *host;
uint8_t found = 0;
unsigned int b, t, l;
scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
srb_t *sp;
int ret, i;
unsigned int id, lun;
unsigned long serial;
/* Get the SCSI request ptr */
sp = (srb_t *) CMD_SP(cmd);
if (!CMD_SP(cmd))
return FAILED;
/*
* If sp is NULL, command is already returned.
* sp is NULLED just before we call back scsi_done
*
*/
if ((sp == NULL)) {
/* no action - we don't have command */
qla_printk(KERN_INFO, to_qla_host(cmd->device->host),
"qla2xxx_eh_abort: cmd already done sp=%p\n", sp);
DEBUG(printk("qla2xxx_eh_abort: cmd already done sp=%p\n", sp);)
return SUCCESS;
}
if (sp) {
DEBUG(printk("qla2xxx_eh_abort: refcount %i \n",
atomic_read(&sp->ref_count));)
}
ret = FAILED;
vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
id = cmd->device->id;
lun = cmd->device->lun;
serial = cmd->serial_number;
host = ha->host;
/* Check active list for command command. */
spin_unlock_irq(ha->host->host_lock);
spin_lock(&ha->hardware_lock);
for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
sp = ha->outstanding_cmds[i];
/* Generate LU queue on bus, target, LUN */
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
q = GET_LU_Q(vis_ha, t, l);
if (sp == NULL)
continue;
qla_printk(KERN_INFO, ha,
"%s scsi(%ld:%d:%d:%d): cmd_timeout_in_sec=0x%x.\n", __func__,
ha->host_no, (int)b, (int)t, (int)l,
cmd->timeout_per_command / HZ);
if (sp->cmd != cmd)
continue;
/*
* if no LUN queue then something is very wrong!!!
*/
if (q == NULL) {
qla_printk(KERN_WARNING, ha,
"qla2x00: (%x:%x:%x) No LUN queue.\n", b, t, l);
DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
"sp->state=%x\n", __func__, ha->host_no, sp, serial,
sp->state));
DEBUG3(qla2x00_print_scsi_cmd(cmd);)
/* no action - we don't have command */
return FAILED;
}
spin_unlock(&ha->hardware_lock);
if (qla2x00_abort_command(ha, sp)) {
DEBUG2(printk("%s(%ld): abort_command "
"mbx failed.\n", __func__, ha->host_no));
} else {
DEBUG3(printk("%s(%ld): abort_command "
"mbx success.\n", __func__, ha->host_no));
ret = SUCCESS;
}
spin_lock(&ha->hardware_lock);
DEBUG2(printk("scsi(%ld): ABORTing cmd=%p sp=%p jiffies = 0x%lx, "
"timeout=%x, dpc_flags=%lx, vis_ha->dpc_flags=%lx q->flag=%lx\n",
ha->host_no, cmd, sp, jiffies, cmd->timeout_per_command / HZ,
ha->dpc_flags, vis_ha->dpc_flags, q->q_flag));
DEBUG2(qla2x00_print_scsi_cmd(cmd));
break;
}
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk("%s failed:board disabled\n", __func__);)
spin_lock_irq(ha->host->host_lock);
return FAILED;
/* Wait for the command to be returned. */
if (ret == SUCCESS) {
spin_unlock(&ha->hardware_lock);
if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
qla_printk(KERN_ERR, ha,
"scsi(%ld:%d:%d): Abort handler timed out -- %lx "
"%x.\n", ha->host_no, id, lun, serial, ret);
}
spin_lock(&ha->hardware_lock);
}
spin_lock_irq(ha->host->host_lock);
/* Search done queue */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->done_queue) {
rp = list_entry(list, srb_t, list);
if (cmd != rp->cmd)
continue;
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d): Abort command issued -- %lx %x.\n", ha->host_no,
id, lun, serial, ret);
/*
* Found command.Remove it from done list.
* And proceed to post completion to scsi mid layer.
*/
return_status = SUCCESS;
found++;
qla2x00_delete_from_done_queue(ha, sp);
return ret;
}
break;
} /* list_for_each_safe() */
spin_unlock(&ha->list_lock);
/**************************************************************************
* qla2x00_eh_wait_for_pending_target_commands
*
* Description:
* Waits for all the commands to come back from the specified target.
*
* Input:
* ha - pointer to scsi_qla_host structure.
* t - target
* Returns:
* Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
{
int cnt;
int status;
srb_t *sp;
struct scsi_cmnd *cmd;
/*
* Return immediately if the aborted command was already in the done
* queue
*/
if (found) {
qla_printk(KERN_INFO, ha,
"qla2xxx_eh_abort: Returning completed command=%p sp=%p\n",
cmd, sp);
sp_put(ha, sp);
return (return_status);
}
status = 0;
/*
* See if this command is in the retry queue
*/
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p in retry "
"queue.\n", sp);)
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->retry_queue) {
rp = list_entry(list, srb_t, list);
if (cmd != rp->cmd)
continue;
DEBUG2(printk("qla2xxx_eh_abort: found "
"in retry queue. SP=%p\n", sp);)
__del_from_retry_queue(ha, rp);
cmd->result = DID_ABORT << 16;
__add_to_done_queue(ha, rp);
return_status = SUCCESS;
found++;
break;
}
spin_unlock(&ha->list_lock);
/*
* Our SP pointer points at the command we want to remove from the
* pending queue providing we haven't already sent it to the adapter.
*/
if (!found) {
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
"in pending queue.\n", sp);)
spin_lock(&vis_ha->list_lock);
list_for_each_safe(list, temp, &vis_ha->pending_queue) {
rp = list_entry(list, srb_t, list);
if (rp->cmd != cmd)
continue;
/* Remove srb from LUN queue. */
rp->flags |= SRB_ABORTED;
DEBUG2(printk("qla2xxx_eh_abort: Cmd in pending queue."
" serial_number %ld.\n",
sp->cmd->serial_number);)
__del_from_pending_queue(vis_ha, rp);
cmd->result = DID_ABORT << 16;
__add_to_done_queue(vis_ha, rp);
return_status = SUCCESS;
found++;
break;
} /* list_for_each_safe() */
spin_unlock(&vis_ha->list_lock);
} /*End of if !found */
if (!found) { /* find the command in our active list */
DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
"in outstanding queue.\n", sp);)
spin_lock(&ha->hardware_lock);
for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
sp = ha->outstanding_cmds[i];
if (sp == NULL)
continue;
if (sp->cmd != cmd)
continue;
DEBUG2(printk("qla2xxx_eh_abort(%ld): aborting sp %p "
"from RISC. pid=%ld sp->state=%x q->q_flag=%lx\n",
ha->host_no, sp, sp->cmd->serial_number,
sp->state, q->q_flag);)
DEBUG(qla2x00_print_scsi_cmd(cmd);)
/* Get a reference to the sp and drop the lock.*/
sp_get(ha, sp);
spin_unlock(&ha->hardware_lock);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_abort_command(ha, sp)) {
DEBUG2(printk("qla2xxx_eh_abort: abort_command "
"mbx failed.\n");)
return_status = FAILED;
} else {
DEBUG3(printk("qla2xxx_eh_abort: abort_command "
" mbx success.\n");)
return_status = SUCCESS;
}
sp_put(ha,sp);
spin_lock_irq(ha->host->host_lock);
spin_lock(&ha->hardware_lock);
/*
* Regardless of mailbox command status, go check on
* done queue just in case the sp is already done.
*/
break;
}/*End of for loop */
spin_unlock(&ha->hardware_lock);
} /*End of if !found */
/* Waiting for our command in done_queue to be returned to OS.*/
if (qla2x00_eh_wait_on_command(ha, cmd) != 0) {
DEBUG2(printk("qla2xxx_eh_abort: cmd returned back to OS.\n");)
return_status = SUCCESS;
}
if (return_status == FAILED) {
qla_printk(KERN_INFO, ha,
"qla2xxx_eh_abort Exiting: status=Failed\n");
return FAILED;
}
DEBUG2(printk("qla2xxx_eh_abort: Exiting. return_status=0x%x.\n",
return_status));
return return_status;
}
/**************************************************************************
* qla2x00_eh_wait_for_pending_target_commands
*
* Description:
* Waits for all the commands to come back from the specified target.
*
* Input:
* ha - pointer to scsi_qla_host structure.
* t - target
* Returns:
* Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
{
int cnt;
int status;
srb_t *sp;
struct scsi_cmnd *cmd;
status = 0;
/*
* Waiting for all commands for the designated target in the active
* array
* Waiting for all commands for the designated target in the active
* array
*/
for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
spin_lock(&ha->hardware_lock);
......@@ -1313,8 +822,7 @@ qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
break;
}
}
}
else {
} else {
spin_unlock(&ha->hardware_lock);
}
}
......@@ -1344,96 +852,45 @@ qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
int
qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
{
int return_status;
unsigned int b, t, l;
scsi_qla_host_t *ha;
os_tgt_t *tq;
os_lun_t *lq;
fc_port_t *fcport_to_reset;
srb_t *rp;
struct list_head *list, *temp;
return_status = FAILED;
if (cmd == NULL) {
printk(KERN_INFO
"%s(): **** SCSI mid-layer passing in NULL cmd\n",
__func__);
return (return_status);
}
b = cmd->device->channel;
t = cmd->device->id;
l = cmd->device->lun;
ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
tq = TGT_Q(ha, t);
if (tq == NULL) {
qla_printk(KERN_INFO, ha,
"%s(): **** CMD derives a NULL TGT_Q\n", __func__);
scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
os_tgt_t *tq = (os_tgt_t *) cmd->device->hostdata;
fc_port_t *fcport = tq->fcport;
os_lun_t *lq;
srb_t *sp;
int ret;
unsigned int id, lun;
unsigned long serial;
return (return_status);
}
lq = (os_lun_t *)LUN_Q(ha, t, l);
if (lq == NULL) {
printk(KERN_INFO
"%s(): **** CMD derives a NULL LUN_Q\n", __func__);
ret = FAILED;
return (return_status);
}
fcport_to_reset = lq->fclun->fcport;
id = cmd->device->id;
lun = cmd->device->lun;
serial = cmd->serial_number;
/* If we are coming in from the back-door, stall I/O until complete. */
if (!cmd->device->host->eh_active)
set_bit(TQF_SUSPENDED, &tq->flags);
sp = (srb_t *) CMD_SP(cmd);
lq = GET_LU_Q(ha, id, lun);
if (!sp || !fcport || !lq)
return ret;
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, b, t, l);
DEBUG2(printk(KERN_INFO
"scsi(%ld): DEVICE_RESET cmd=%p jiffies = 0x%lx, timeout=%x, "
"dpc_flags=%lx, status=%x allowed=%d cmd.state=%x\n",
ha->host_no, cmd, jiffies, cmd->timeout_per_command / HZ,
ha->dpc_flags, cmd->result, cmd->allowed, cmd->state));
/* Clear commands from the retry queue. */
spin_lock(&ha->list_lock);
list_for_each_safe(list, temp, &ha->retry_queue) {
rp = list_entry(list, srb_t, list);
if (t != rp->cmd->device->id)
continue;
DEBUG2(printk(KERN_INFO
"qla2xxx_eh_reset: found in retry queue. SP=%p\n", rp));
__del_from_retry_queue(ha, rp);
rp->cmd->result = DID_RESET << 16;
__add_to_done_queue(ha, rp);
}
spin_unlock(&ha->list_lock);
"scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk(KERN_INFO
"%s failed:board disabled\n",__func__));
spin_lock_irq(ha->host->host_lock);
goto eh_dev_reset_done;
}
if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
if (qla2x00_device_reset(ha, fcport_to_reset) == 0) {
return_status = SUCCESS;
}
if (qla2x00_device_reset(ha, fcport) == 0)
ret = SUCCESS;
#if defined(LOGOUT_AFTER_DEVICE_RESET)
if (return_status == SUCCESS) {
if (fcport_to_reset->flags & FC_FABRIC_DEVICE) {
qla2x00_fabric_logout(ha,
fcport_to_reset->loop_id);
qla2x00_mark_device_lost(ha, fcport_to_reset);
if (ret == SUCCESS) {
if (fcport->flags & FC_FABRIC_DEVICE) {
qla2x00_fabric_logout(ha, fcport->loop_id);
qla2x00_mark_device_lost(ha, fcport);
}
}
#endif
......@@ -1442,9 +899,7 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
"%s failed: loop not ready\n",__func__);)
}
spin_lock_irq(ha->host->host_lock);
if (return_status == FAILED) {
if (ret == FAILED) {
DEBUG3(printk("%s(%ld): device reset failed\n",
__func__, ha->host_no));
qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
......@@ -1458,10 +913,10 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
* complete for the device.
*/
if (cmd->device->host->eh_active) {
if (qla2x00_eh_wait_for_pending_target_commands(ha, t))
return_status = FAILED;
if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
ret = FAILED;
if (return_status == FAILED) {
if (ret == FAILED) {
DEBUG3(printk("%s(%ld): failed while waiting for "
"commands\n", __func__, ha->host_no));
qla_printk(KERN_INFO, ha,
......@@ -1473,15 +928,12 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
}
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
ha->host_no, b, t, l);
"scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
eh_dev_reset_done:
spin_lock_irq(ha->host->host_lock);
if (!cmd->device->host->eh_active)
clear_bit(TQF_SUSPENDED, &tq->flags);
return (return_status);
return ret;
}
/**************************************************************************
......@@ -1549,44 +1001,55 @@ qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
int
qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
{
scsi_qla_host_t *ha;
scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
os_tgt_t *tq = (os_tgt_t *) cmd->device->hostdata;
fc_port_t *fcport = tq->fcport;
os_lun_t *lq;
srb_t *sp;
int rval = FAILED;
int ret;
unsigned int id, lun;
unsigned long serial;
ret = FAILED;
id = cmd->device->id;
lun = cmd->device->lun;
serial = cmd->serial_number;
ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
sp = (srb_t *) CMD_SP(cmd);
lq = GET_LU_Q(ha, id, lun);
if (!sp || !fcport || !lq)
return ret;
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): LOOP RESET ISSUED.\n", ha->host_no,
cmd->device->channel, cmd->device->id, cmd->device->lun);
"scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
DEBUG2(printk("%s failed:board disabled\n",__func__));
spin_lock_irq(ha->host->host_lock);
return FAILED;
goto eh_bus_reset_done;
}
if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
rval = SUCCESS;
if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
ret = SUCCESS;
}
spin_lock_irq(ha->host->host_lock);
if (rval == FAILED)
goto out;
if (ret == FAILED)
goto eh_bus_reset_done;
/* Waiting for our command in done_queue to be returned to OS.*/
if (cmd->device->host->eh_active)
if (!qla2x00_eh_wait_for_pending_commands(ha))
rval = FAILED;
ret = FAILED;
out:
eh_bus_reset_done:
qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
(rval == FAILED) ? "failed" : "succeded");
(ret == FAILED) ? "failed" : "succeded");
return rval;
spin_lock_irq(ha->host->host_lock);
return ret;
}
/**************************************************************************
......@@ -1607,24 +1070,33 @@ qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
int
qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
{
scsi_qla_host_t *ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
int rval = SUCCESS;
scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
os_tgt_t *tq = (os_tgt_t *) cmd->device->hostdata;
fc_port_t *fcport = tq->fcport;
os_lun_t *lq;
srb_t *sp;
int ret;
unsigned int id, lun;
unsigned long serial;
/* Display which one we're actually resetting for debug. */
DEBUG(printk("qla2xxx_eh_host_reset:Resetting scsi(%ld).\n",
ha->host_no));
ret = FAILED;
id = cmd->device->id;
lun = cmd->device->lun;
serial = cmd->serial_number;
sp = (srb_t *) CMD_SP(cmd);
lq = GET_LU_Q(ha, id, lun);
if (!sp || !fcport || !lq)
return ret;
/*
* Now issue reset.
*/
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): ADAPTER RESET issued.\n", ha->host_no,
cmd->device->channel, cmd->device->id, cmd->device->lun);
"scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
spin_unlock_irq(ha->host->host_lock);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
goto board_disabled;
goto eh_host_reset_lock;
/*
* Fixme-may be dpc thread is active and processing
......@@ -1634,7 +1106,6 @@ qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
* devices as lost kicking of the port_down_timer
* while dpc is stuck for the mailbox to complete.
*/
/* Blocking call-Does context switching if loop is Not Ready */
qla2x00_wait_for_loop_ready(ha);
set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
if (qla2x00_abort_isp(ha)) {
......@@ -1643,32 +1114,22 @@ qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
goto board_disabled;
goto eh_host_reset_lock;
}
clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
spin_lock_irq(ha->host->host_lock);
if (rval == FAILED)
goto out;
/* Waiting for our command in done_queue to be returned to OS.*/
if (!qla2x00_eh_wait_for_pending_commands(ha))
rval = FAILED;
out:
qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
(rval == FAILED) ? "failed" : "succeded");
if (qla2x00_eh_wait_for_pending_commands(ha))
ret = SUCCESS;
return rval;
board_disabled:
eh_host_reset_lock:
spin_lock_irq(ha->host->host_lock);
qla_printk(KERN_INFO, ha, "%s: failed:board disabled\n", __func__);
return FAILED;
}
qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
(ret == FAILED) ? "failed" : "succeded");
return ret;
}
/*
* qla2x00_loop_reset
......@@ -1752,41 +1213,38 @@ qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
return qla2x00_abort_target(reset_fcport);
}
/**************************************************************************
* qla2xxx_slave_configure
*
* Description:
**************************************************************************/
int
qla2xxx_slave_configure(struct scsi_device *sdev)
static int
qla2xxx_slave_alloc(struct scsi_device *sdev)
{
scsi_qla_host_t *ha = to_qla_host(sdev->host);
int queue_depth;
os_tgt_t *tq;
if (IS_QLA2100(ha) || IS_QLA2200(ha))
queue_depth = 16;
else
queue_depth = 32;
tq = (os_tgt_t *) TGT_Q(ha, sdev->id);
if (!tq)
return -ENXIO;
if (!tq->fcport)
return -ENXIO;
if (sdev->tagged_supported) {
if (ql2xmaxqdepth != 0 && ql2xmaxqdepth <= 0xffffU)
queue_depth = ql2xmaxqdepth;
sdev->hostdata = tq;
ql2xmaxqdepth = queue_depth;
return 0;
}
scsi_activate_tcq(sdev, queue_depth);
static int
qla2xxx_slave_configure(struct scsi_device *sdev)
{
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, 32);
else
scsi_deactivate_tcq(sdev, 32);
qla_printk(KERN_INFO, ha,
"scsi(%d:%d:%d:%d): Enabled tagged queuing, queue "
"depth %d.\n",
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun,
sdev->queue_depth);
} else {
scsi_adjust_queue_depth(sdev, 0 /* TCQ off */,
sdev->host->hostt->cmd_per_lun /* 3 */);
}
return 0;
}
return (0);
static void
qla2xxx_slave_destroy(struct scsi_device *sdev)
{
sdev->hostdata = NULL;
}
/**
......@@ -1993,10 +1451,6 @@ int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
INIT_LIST_HEAD(&ha->list);
INIT_LIST_HEAD(&ha->fcports);
INIT_LIST_HEAD(&ha->rscn_fcports);
INIT_LIST_HEAD(&ha->done_queue);
INIT_LIST_HEAD(&ha->retry_queue);
INIT_LIST_HEAD(&ha->scsi_retry_queue);
INIT_LIST_HEAD(&ha->pending_queue);
/*
* These locks are used to prevent more than one CPU
......@@ -2005,7 +1459,6 @@ int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
* contention for these locks.
*/
spin_lock_init(&ha->mbx_reg_lock);
spin_lock_init(&ha->list_lock);
ha->dpc_pid = -1;
init_completion(&ha->dpc_inited);
......@@ -2381,13 +1834,6 @@ qla2x00_proc_info(struct Scsi_Host *shost, char *buffer,
"Number of retries for empty slots = %ld\n",
qla2x00_stats.outarray_full);
copy_info(&info,
"Number of reqs in pending_q= %ld, retry_q= %d, "
"done_q= %ld, scsi_retry_q= %d\n",
ha->qthreads, ha->retry_q_cnt,
ha->done_q_cnt, ha->scsi_retry_q_cnt);
flags = (uint32_t *) &ha->flags;
if (atomic_read(&ha->loop_state) == LOOP_DOWN) {
......@@ -2631,93 +2077,6 @@ qla2x00_display_fc_names(scsi_qla_host_t *ha)
}
}
/*
* qla2x00_suspend_lun
* Suspend lun and start port down timer
*
* Input:
* ha = visable adapter block pointer.
* lq = lun queue
* cp = Scsi command pointer
* time = time in seconds
* count = number of times to let time expire
* delay_lun = non-zero, if lun should be delayed rather than suspended
*
* Return:
* QLA_SUCCESS -- suspended lun
* QLA_FUNCTION_FAILED -- Didn't suspend lun
*
* Context:
* Interrupt context.
*/
int
__qla2x00_suspend_lun(scsi_qla_host_t *ha,
os_lun_t *lq, int time, int count, int delay_lun)
{
int rval;
srb_t *sp;
struct list_head *list, *temp;
unsigned long flags;
rval = QLA_SUCCESS;
/* if the lun_q is already suspended then don't do it again */
if (lq->q_state == LUN_STATE_READY ||lq->q_state == LUN_STATE_RUN) {
spin_lock_irqsave(&lq->q_lock, flags);
if (lq->q_state == LUN_STATE_READY) {
lq->q_max = count;
lq->q_count = 0;
}
/* Set the suspend time usually 6 secs */
atomic_set(&lq->q_timer, time);
/* now suspend the lun */
lq->q_state = LUN_STATE_WAIT;
if (delay_lun) {
set_bit(LUN_EXEC_DELAYED, &lq->q_flag);
DEBUG(printk(KERN_INFO
"scsi(%ld): Delay lun execution for %d secs, "
"count=%d, max count=%d, state=%d\n",
ha->host_no,
time,
lq->q_count, lq->q_max, lq->q_state));
} else {
DEBUG(printk(KERN_INFO
"scsi(%ld): Suspend lun for %d secs, count=%d, "
"max count=%d, state=%d\n",
ha->host_no,
time,
lq->q_count, lq->q_max, lq->q_state));
}
spin_unlock_irqrestore(&lq->q_lock, flags);
/*
* Remove all pending commands from request queue and put them
* in the scsi_retry queue.
*/
spin_lock_irqsave(&ha->list_lock, flags);
list_for_each_safe(list, temp, &ha->pending_queue) {
sp = list_entry(list, srb_t, list);
if (sp->lun_queue != lq)
continue;
__del_from_pending_queue(ha, sp);
if (sp->cmd->allowed < count)
sp->cmd->allowed = count;
__add_to_scsi_retry_queue(ha, sp);
} /* list_for_each_safe */
spin_unlock_irqrestore(&ha->list_lock, flags);
rval = QLA_SUCCESS;
} else {
rval = QLA_FUNCTION_FAILED;
}
return (rval);
}
/*
* qla2x00_mark_device_lost Updates fcport state when device goes offline.
......@@ -3188,16 +2547,8 @@ qla2x00_do_dpc(void *data)
DECLARE_MUTEX_LOCKED(sem);
scsi_qla_host_t *ha;
fc_port_t *fcport;
os_lun_t *q;
srb_t *sp;
uint8_t status;
unsigned long flags = 0;
struct list_head *list, *templist;
int dead_cnt, online_cnt;
int retry_cmds = 0;
uint16_t next_loopid;
int t;
os_tgt_t *tq;
ha = (scsi_qla_host_t *)data;
......@@ -3233,139 +2584,7 @@ qla2x00_do_dpc(void *data)
ha->dpc_active = 1;
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
/* Process commands in retry queue */
if (test_and_clear_bit(PORT_RESTART_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): DPC checking retry_q. "
"total=%d\n",
ha->host_no, ha->retry_q_cnt));
spin_lock_irqsave(&ha->list_lock, flags);
dead_cnt = online_cnt = 0;
list_for_each_safe(list, templist, &ha->retry_queue) {
sp = list_entry(list, srb_t, list);
q = sp->lun_queue;
DEBUG3(printk("scsi(%ld): pid=%ld sp=%p, "
"spflags=0x%x, q_flag= 0x%lx\n",
ha->host_no, sp->cmd->serial_number, sp,
sp->flags, q->q_flag));
if (q == NULL)
continue;
fcport = q->fclun->fcport;
if (atomic_read(&fcport->state) ==
FCS_DEVICE_DEAD ||
atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
__del_from_retry_queue(ha, sp);
sp->cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&fcport->ha->loop_state) ==
LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
sp->cmd->host_scribble =
(unsigned char *) NULL;
__add_to_done_queue(ha, sp);
dead_cnt++;
} else if (atomic_read(&fcport->state) !=
FCS_DEVICE_LOST) {
__del_from_retry_queue(ha, sp);
sp->cmd->result = DID_BUS_BUSY << 16;
sp->cmd->host_scribble =
(unsigned char *) NULL;
__add_to_done_queue(ha, sp);
online_cnt++;
}
} /* list_for_each_safe() */
spin_unlock_irqrestore(&ha->list_lock, flags);
DEBUG(printk("scsi(%ld): done processing retry queue "
"- dead=%d, online=%d\n ",
ha->host_no, dead_cnt, online_cnt));
}
/* Process commands in scsi retry queue */
if (test_and_clear_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags)) {
/*
* Any requests we want to delay for some period is put
* in the scsi retry queue with a delay added. The
* timer will schedule a "scsi_restart_needed" every
* second as long as there are requests in the scsi
* queue.
*/
DEBUG(printk("scsi(%ld): DPC checking scsi "
"retry_q.total=%d\n",
ha->host_no, ha->scsi_retry_q_cnt));
online_cnt = 0;
spin_lock_irqsave(&ha->list_lock, flags);
list_for_each_safe(list, templist,
&ha->scsi_retry_queue) {
sp = list_entry(list, srb_t, list);
q = sp->lun_queue;
tq = sp->tgt_queue;
DEBUG3(printk("scsi(%ld): scsi_retry_q: "
"pid=%ld sp=%p, spflags=0x%x, "
"q_flag= 0x%lx,q_state=%d\n",
ha->host_no, sp->cmd->serial_number,
sp, sp->flags, q->q_flag, q->q_state));
/* Was this lun suspended */
if (q->q_state != LUN_STATE_WAIT) {
online_cnt++;
__del_from_scsi_retry_queue(ha, sp);
if (test_bit(TQF_RETRY_CMDS,
&tq->flags)) {
qla2x00_extend_timeout(sp->cmd,
(sp->cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
__add_to_pending_queue(ha, sp);
retry_cmds++;
} else
__add_to_retry_queue(ha, sp);
}
/* Was this command suspended for N secs */
if (sp->delay != 0) {
sp->delay--;
if (sp->delay == 0) {
online_cnt++;
__del_from_scsi_retry_queue(
ha, sp);
__add_to_retry_queue(ha,sp);
}
}
}
spin_unlock_irqrestore(&ha->list_lock, flags);
/* Clear all Target Unsuspended bits */
for (t = 0; t < ha->max_targets; t++) {
if ((tq = ha->otgt[t]) == NULL)
continue;
if (test_bit(TQF_RETRY_CMDS, &tq->flags))
clear_bit(TQF_RETRY_CMDS, &tq->flags);
}
if (retry_cmds)
qla2x00_next(ha);
DEBUG(if (online_cnt > 0))
DEBUG(printk("scsi(%ld): dpc() found scsi reqs to "
"restart= %d\n",
ha->host_no, online_cnt));
}
if (ha->flags.mbox_busy) {
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
ha->dpc_active = 0;
continue;
}
......@@ -3493,28 +2712,6 @@ qla2x00_do_dpc(void *data)
ha->host_no));
}
if (test_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): qla2x00_restart_queues()\n",
ha->host_no));
qla2x00_restart_queues(ha, 0);
DEBUG(printk("scsi(%ld): qla2x00_restart_queues - end\n",
ha->host_no));
}
if (test_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): qla2x00_abort_queues()\n",
ha->host_no));
qla2x00_abort_queues(ha, 0);
DEBUG(printk("scsi(%ld): qla2x00_abort_queues - end\n",
ha->host_no));
}
if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
......@@ -3527,13 +2724,9 @@ qla2x00_do_dpc(void *data)
ha->host_no));
}
if (!ha->interrupts_on)
qla2x00_enable_intrs(ha);
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
ha->dpc_active = 0;
} /* End of while(1) */
......@@ -3548,45 +2741,6 @@ qla2x00_do_dpc(void *data)
complete_and_exit(&ha->dpc_exited, 0);
}
/*
* qla2x00_abort_queues
* Abort all commands on queues on device
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Interrupt context.
*/
void
qla2x00_abort_queues(scsi_qla_host_t *ha, uint8_t doneqflg)
{
srb_t *sp;
struct list_head *list, *temp;
unsigned long flags;
clear_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
/* Return all commands device queues. */
spin_lock_irqsave(&ha->list_lock,flags);
list_for_each_safe(list, temp, &ha->pending_queue) {
sp = list_entry(list, srb_t, list);
if (sp->flags & SRB_ABORTED)
continue;
/* Remove srb from LUN queue. */
__del_from_pending_queue(ha, sp);
/* Set ending status. */
sp->cmd->result = DID_BUS_BUSY << 16;
__add_to_done_queue(ha, sp);
}
spin_unlock_irqrestore(&ha->list_lock, flags);
}
/*
* qla2x00_rst_aen
* Processes asynchronous reset.
......@@ -3632,6 +2786,36 @@ qla2x00_get_new_sp(scsi_qla_host_t *ha)
return (sp);
}
static void
qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
{
struct scsi_cmnd *cmd = sp->cmd;
if (sp->flags & SRB_DMA_VALID) {
if (cmd->use_sg) {
dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
cmd->use_sg, cmd->sc_data_direction);
} else if (cmd->request_bufflen) {
dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
cmd->request_bufflen, cmd->sc_data_direction);
}
sp->flags &= ~SRB_DMA_VALID;
}
}
void
qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
{
struct scsi_cmnd *cmd = sp->cmd;
qla2x00_sp_free_dma(ha, sp);
CMD_SP(cmd) = NULL;
mempool_free(sp, ha->srb_mempool);
cmd->scsi_done(cmd);
}
/**************************************************************************
* qla2x00_timer
*
......@@ -3643,30 +2827,12 @@ qla2x00_get_new_sp(scsi_qla_host_t *ha)
static void
qla2x00_timer(scsi_qla_host_t *ha)
{
int t,l;
unsigned long cpu_flags = 0;
fc_port_t *fcport;
os_lun_t *lq;
os_tgt_t *tq;
int start_dpc = 0;
int index;
srb_t *sp;
/*
* We try and restart any request in the retry queue every second.
*/
if (!list_empty(&ha->retry_queue)) {
set_bit(PORT_RESTART_NEEDED, &ha->dpc_flags);
start_dpc++;
}
/*
* We try and restart any request in the scsi_retry queue every second.
*/
if (!list_empty(&ha->scsi_retry_queue)) {
set_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags);
start_dpc++;
}
int t;
/*
* Ports - Port down timer.
......@@ -3696,59 +2862,6 @@ qla2x00_timer(scsi_qla_host_t *ha)
t++;
} /* End of for fcport */
/*
* LUNS - lun suspend timer.
*
* Whenever, a lun is suspended the timer starts decrementing its
* suspend timer every second until it reaches zero. Once it reaches
* zero the lun retry count is decremented.
*/
/*
* FIXME(dg) - Need to convert this linear search of luns into a search
* of a list of suspended luns.
*/
for (t = 0; t < ha->max_targets; t++) {
if ((tq = ha->otgt[t]) == NULL)
continue;
for (l = 0; l < ha->max_luns; l++) {
if ((lq = (os_lun_t *) tq->olun[l]) == NULL)
continue;
spin_lock_irqsave(&lq->q_lock, cpu_flags);
if (lq->q_state == LUN_STATE_WAIT &&
atomic_read(&lq->q_timer) != 0) {
if (atomic_dec_and_test(&lq->q_timer) != 0) {
/*
* A delay should immediately
* transition to a READY state
*/
if (test_and_clear_bit(LUN_EXEC_DELAYED,
&lq->q_flag)) {
lq->q_state = LUN_STATE_READY;
}
else {
lq->q_count++;
if (lq->q_count == lq->q_max)
lq->q_state =
LUN_STATE_TIMEOUT;
else
lq->q_state =
LUN_STATE_RUN;
}
}
DEBUG3(printk("scsi(%ld): lun%d - timer %d, "
"count=%d, max=%d, state=%d\n",
ha->host_no,
l,
atomic_read(&lq->q_timer),
lq->q_count, lq->q_max, lq->q_state));
}
spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
} /* End of for luns */
} /* End of for targets */
/* Loop down handler. */
if (atomic_read(&ha->loop_down_timer) > 0 &&
......@@ -3808,19 +2921,12 @@ qla2x00_timer(scsi_qla_host_t *ha)
atomic_read(&ha->loop_down_timer)));
}
/*
* Done Q Handler -- dgFIXME This handler will kick off doneq if we
* haven't process it in 2 seconds.
*/
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
/* Schedule the DPC routine if needed */
if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
start_dpc ||
test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
ha->dpc_wait && !ha->dpc_active) {
......@@ -3830,496 +2936,6 @@ qla2x00_timer(scsi_qla_host_t *ha)
qla2x00_restart_timer(ha, WATCH_INTERVAL);
}
/*
* qla2x00_extend_timeout
* This routine will extend the timeout to the specified value.
*
* Input:
* cmd = SCSI command structure
*
* Returns:
* None.
*/
void
qla2x00_extend_timeout(struct scsi_cmnd *cmd, int timeout)
{
srb_t *sp = (srb_t *) CMD_SP(cmd);
u_long our_jiffies = (timeout * HZ) + jiffies;
sp->ext_history= 0;
sp->e_start = jiffies;
if (cmd->eh_timeout.function) {
mod_timer(&cmd->eh_timeout,our_jiffies);
sp->ext_history |= 1;
}
if (sp->timer.function != NULL) {
/*
* Our internal timer should timeout before the midlayer has a
* chance begin the abort process
*/
mod_timer(&sp->timer,our_jiffies - (QLA_CMD_TIMER_DELTA * HZ));
sp->ext_history |= 2;
}
}
/**************************************************************************
* qla2x00_cmd_timeout
*
* Description:
* Handles the command if it times out in any state.
*
* Input:
* sp - pointer to validate
*
* Returns:
* None.
* Note:Need to add the support for if( sp->state == SRB_FAILOVER_STATE).
**************************************************************************/
void
qla2x00_cmd_timeout(srb_t *sp)
{
int t, l;
int processed;
scsi_qla_host_t *vis_ha, *dest_ha;
struct scsi_cmnd *cmd;
unsigned long flags, cpu_flags;
fc_port_t *fcport;
cmd = sp->cmd;
vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
DEBUG3(printk("cmd_timeout: Entering sp->state = %x\n", sp->state));
t = cmd->device->id;
l = cmd->device->lun;
fcport = sp->fclun->fcport;
dest_ha = sp->ha;
/*
* If IO is found either in retry Queue
* OR in Lun Queue
* Return this IO back to host
*/
spin_lock_irqsave(&vis_ha->list_lock, flags);
processed = 0;
if (sp->state == SRB_PENDING_STATE) {
__del_from_pending_queue(vis_ha, sp);
DEBUG2(printk("scsi(%ld): Found in Pending queue pid %ld, "
"State = %x., fcport state=%d sjiffs=%lx njiffs=%lx\n",
vis_ha->host_no, cmd->serial_number, sp->state,
atomic_read(&fcport->state), sp->r_start, jiffies));
/*
* If FC_DEVICE is marked as dead return the cmd with
* DID_NO_CONNECT status. Otherwise set the host_byte to
* DID_BUS_BUSY to let the OS retry this cmd.
*/
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&fcport->ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
} else {
cmd->result = DID_BUS_BUSY << 16;
}
__add_to_done_queue(vis_ha, sp);
processed++;
}
spin_unlock_irqrestore(&vis_ha->list_lock, flags);
if (processed) {
qla2x00_done(vis_ha);
return;
}
spin_lock_irqsave(&dest_ha->list_lock, flags);
if ((sp->state == SRB_RETRY_STATE) ||
(sp->state == SRB_SCSI_RETRY_STATE)) {
DEBUG2(printk("scsi(%ld): Found in (Scsi) Retry queue or "
"failover Q pid %ld, State = %x., fcport state=%d "
"jiffies=%lx retried=%d\n",
dest_ha->host_no, cmd->serial_number, sp->state,
atomic_read(&fcport->state), jiffies, cmd->retries));
if ((sp->state == SRB_RETRY_STATE)) {
__del_from_retry_queue(dest_ha, sp);
} else if ((sp->state == SRB_SCSI_RETRY_STATE)) {
__del_from_scsi_retry_queue(dest_ha, sp);
}
/*
* If FC_DEVICE is marked as dead return the cmd with
* DID_NO_CONNECT status. Otherwise set the host_byte to
* DID_BUS_BUSY to let the OS retry this cmd.
*/
if ((atomic_read(&fcport->state) == FCS_DEVICE_DEAD) ||
atomic_read(&dest_ha->loop_state) == LOOP_DEAD) {
qla2x00_extend_timeout(cmd, EXTEND_CMD_TIMEOUT);
cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
} else {
cmd->result = DID_BUS_BUSY << 16;
}
__add_to_done_queue(dest_ha, sp);
processed++;
}
spin_unlock_irqrestore(&dest_ha->list_lock, flags);
if (processed) {
qla2x00_done(dest_ha);
return;
}
spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
if (sp->state == SRB_DONE_STATE) {
/* IO in done_q -- leave it */
DEBUG(printk("scsi(%ld): Found in Done queue pid %ld sp=%p.\n",
dest_ha->host_no, cmd->serial_number, sp));
} else if (sp->state == SRB_SUSPENDED_STATE) {
DEBUG(printk("scsi(%ld): Found SP %p in suspended state "
"- pid %ld:\n",
dest_ha->host_no, sp, cmd->serial_number));
DEBUG(qla2x00_dump_buffer((uint8_t *)sp, sizeof(srb_t));)
} else if (sp->state == SRB_ACTIVE_STATE) {
/*
* IO is with ISP find the command in our active list.
*/
spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
spin_lock_irqsave(&dest_ha->hardware_lock, flags);
if (sp == dest_ha->outstanding_cmds[
(unsigned long)sp->cmd->host_scribble]) {
DEBUG(printk("cmd_timeout: Found in ISP \n"));
if (sp->flags & SRB_TAPE) {
/*
* We cannot allow the midlayer error handler
* to wakeup and begin the abort process.
* Extend the timer so that the firmware can
* properly return the IOCB.
*/
DEBUG(printk("cmd_timeout: Extending timeout "
"of FCP2 tape command!\n"));
qla2x00_extend_timeout(sp->cmd,
EXTEND_CMD_TIMEOUT);
}
sp->state = SRB_ACTIVE_TIMEOUT_STATE;
spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
} else {
spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
printk(KERN_INFO
"qla_cmd_timeout: State indicates it is with "
"ISP, But not in active array\n");
}
spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
} else if (sp->state == SRB_ACTIVE_TIMEOUT_STATE) {
DEBUG(printk("qla2100%ld: Found in Active timeout state"
"pid %ld, State = %x., \n",
dest_ha->host_no,
sp->cmd->serial_number, sp->state);)
} else {
/* EMPTY */
DEBUG2(printk("cmd_timeout%ld: LOST command state = "
"0x%x, sp=%p\n",
vis_ha->host_no, sp->state,sp);)
qla_printk(KERN_INFO, vis_ha,
"cmd_timeout: LOST command state = 0x%x\n", sp->state);
}
spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
DEBUG3(printk("cmd_timeout: Leaving\n");)
}
/**************************************************************************
* qla2x00_done
* Process completed commands.
*
* Input:
* old_ha = adapter block pointer.
*
**************************************************************************/
void
qla2x00_done(scsi_qla_host_t *old_ha)
{
os_lun_t *lq;
struct scsi_cmnd *cmd;
unsigned long flags = 0;
scsi_qla_host_t *ha;
scsi_qla_host_t *vis_ha;
int send_marker_once = 0;
srb_t *sp, *sptemp;
LIST_HEAD(local_sp_list);
/*
* Get into local queue such that we do not wind up calling done queue
* tasklet for the same IOs from DPC or any other place.
*/
spin_lock_irqsave(&old_ha->list_lock, flags);
list_splice_init(&old_ha->done_queue, &local_sp_list);
spin_unlock_irqrestore(&old_ha->list_lock, flags);
/*
* All done commands are in the local queue, now do the call back.
*/
list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
old_ha->done_q_cnt--;
sp->state = SRB_NO_QUEUE_STATE;
/* remove command from local list */
list_del_init(&sp->list);
cmd = sp->cmd;
if (cmd == NULL)
continue;
vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
lq = sp->lun_queue;
ha = sp->ha;
if (sp->flags & SRB_DMA_VALID) {
sp->flags &= ~SRB_DMA_VALID;
/* Release memory used for this I/O */
if (cmd->use_sg) {
pci_unmap_sg(ha->pdev, cmd->request_buffer,
cmd->use_sg, cmd->sc_data_direction);
} else if (cmd->request_bufflen) {
pci_unmap_page(ha->pdev, sp->dma_handle,
cmd->request_bufflen,
cmd->sc_data_direction);
}
}
switch (host_byte(cmd->result)) {
case DID_OK:
case DID_ERROR:
break;
case DID_RESET:
/*
* Set marker needed, so we don't have to
* send multiple markers
*/
if (!send_marker_once) {
ha->marker_needed = 1;
send_marker_once++;
}
/*
* WORKAROUND
*
* A backdoor device-reset requires different
* error handling. This code differentiates
* between normal error handling and the
* backdoor method.
*
*/
if (ha->host->eh_active != EH_ACTIVE)
cmd->result = DID_BUS_BUSY << 16;
break;
case DID_ABORT:
sp->flags &= ~SRB_ABORT_PENDING;
sp->flags |= SRB_ABORTED;
if (sp->flags & SRB_TIMEOUT)
cmd->result = DID_TIME_OUT << 16;
break;
default:
DEBUG2(printk("scsi(%ld:%d:%d) %s: did_error "
"= %d, comp-scsi= 0x%x-0x%x pid=%ld.\n",
vis_ha->host_no,
cmd->device->id, cmd->device->lun,
__func__,
host_byte(cmd->result),
CMD_COMPL_STATUS(cmd),
CMD_SCSI_STATUS(cmd), cmd->serial_number));
break;
}
/*
* Call the mid-level driver interrupt handler -- via sp_put()
*/
sp_put(ha, sp);
} /* end of while */
}
/*
* qla2x00_process_response_queue_in_zio_mode
* Process response queue completion as fast as possible
* to achieve Zero Interrupt Opertions-ZIO
*
* Input:
* ha = adapter block pointer.
*
* Context:
* Kernel context.
*/
static inline void
qla2x00_process_response_queue_in_zio_mode(scsi_qla_host_t *ha)
{
unsigned long flags;
/* Check for unprocessed commands in response queue. */
if (!ha->flags.process_response_queue)
return;
if (!ha->flags.online)
return;
if (ha->response_ring_ptr->signature == RESPONSE_PROCESSED)
return;
spin_lock_irqsave(&ha->hardware_lock,flags);
qla2x00_process_response_queue(ha);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
/*
* qla2x00_next
* Retrieve and process next job in the LUN queue.
*
* Input:
* tq = SCSI target queue pointer.
* lq = SCSI LUN queue pointer.
* TGT_LOCK must be already obtained.
*
* Output:
* Releases TGT_LOCK upon exit.
*
* Context:
* Kernel/Interrupt context.
*
* Note: This routine will always try to start I/O from visible HBA.
*/
void
qla2x00_next(scsi_qla_host_t *vis_ha)
{
int rval;
unsigned long flags;
scsi_qla_host_t *dest_ha;
fc_port_t *fcport;
srb_t *sp, *sptemp;
LIST_HEAD(local_sp_list);
dest_ha = NULL;
spin_lock_irqsave(&vis_ha->list_lock, flags);
list_splice_init(&vis_ha->pending_queue, &local_sp_list);
vis_ha->qthreads = 0;
spin_unlock_irqrestore(&vis_ha->list_lock, flags);
list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
list_del_init(&sp->list);
sp->state = SRB_NO_QUEUE_STATE;
fcport = sp->fclun->fcport;
dest_ha = fcport->ha;
/* If device is dead then send request back to OS */
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
sp->cmd->result = DID_NO_CONNECT << 16;
if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN)
sp->err_id = SRB_ERR_LOOP;
else
sp->err_id = SRB_ERR_PORT;
DEBUG3(printk("scsi(%ld): loop/port is down - pid=%ld, "
"sp=%p err_id=%d loopid=0x%x queued to dest HBA "
"scsi%ld.\n", dest_ha->host_no,
sp->cmd->serial_number, sp, sp->err_id,
fcport->loop_id, dest_ha->host_no));
/*
* Initiate a failover - done routine will initiate.
*/
add_to_done_queue(vis_ha, sp);
continue;
}
/*
* SCSI Kluge: Whenever, we need to wait for an event such as
* loop down (i.e. loop_down_timer ) or port down (i.e. LUN
* request qeueue is suspended) then we will recycle new
* commands back to the SCSI layer. We do this because this is
* normally a temporary condition and we don't want the
* mid-level scsi.c driver to get upset and start aborting
* commands. The timeout value is extracted from the command
* minus 1-second and put on a retry queue (watchdog). Once the
* command timeout it is returned to the mid-level with a BUSY
* status, so the mid-level will retry it. This process
* continues until the LOOP DOWN time expires or the condition
* goes away.
*/
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
(atomic_read(&fcport->state) != FCS_ONLINE ||
test_bit(ABORT_ISP_ACTIVE, &dest_ha->dpc_flags) ||
atomic_read(&dest_ha->loop_state) != LOOP_READY)) {
DEBUG3(printk("scsi(%ld): pid=%ld port=0x%x state=%d "
"loop state=%d, loop counter=0x%x "
"dpc_flags=0x%lx\n", sp->cmd->serial_number,
dest_ha->host_no, fcport->loop_id,
atomic_read(&fcport->state),
atomic_read(&dest_ha->loop_state),
atomic_read(&dest_ha->loop_down_timer),
dest_ha->dpc_flags));
qla2x00_extend_timeout(sp->cmd, EXTEND_CMD_TIMEOUT);
add_to_retry_queue(vis_ha, sp);
continue;
}
/*
* If this request's lun is suspended then put the request on
* the scsi_retry queue.
*/
if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
sp->lun_queue->q_state == LUN_STATE_WAIT) {
DEBUG3(printk("scsi(%ld): lun wait state - pid=%ld, "
"opcode=%d, allowed=%d, retries=%d\n",
dest_ha->host_no,
sp->cmd->serial_number,
sp->cmd->cmnd[0],
sp->cmd->allowed,
sp->cmd->retries));
add_to_scsi_retry_queue(vis_ha, sp);
continue;
}
sp->lun_queue->io_cnt++;
rval = qla2x00_start_scsi(sp);
if (rval != QLA_SUCCESS) {
/* Place request back on top of device queue */
/* add to the top of queue */
add_to_pending_queue_head(vis_ha, sp);
sp->lun_queue->io_cnt--;
}
}
if (!IS_QLA2100(vis_ha) && !IS_QLA2200(vis_ha)) {
/* Process response_queue if ZIO support is enabled*/
qla2x00_process_response_queue_in_zio_mode(vis_ha);
}
}
/* XXX(hch): crude hack to emulate a down_timeout() */
int
qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
......
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