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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
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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;
}
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
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