This patch reduces lock contention while implementing distributed
completion processing.
Signed-off-by: Wen Xiong <wenxiong@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/ipr.c | 323 +++++++++++++++++++++++++++++++++++++----------------
drivers/scsi/ipr.h | 21 +--
2 files changed, 240 insertions(+), 104 deletions(-)
Index: b/drivers/scsi/ipr.c
===================================================================
--- a/drivers/scsi/ipr.c 2013-01-11 13:40:15.992165067 -0600
+++ b/drivers/scsi/ipr.c 2013-01-11 16:11:20.062476228 -0600
@@ -552,7 +552,8 @@ static void ipr_trc_hook(struct ipr_cmnd
struct ipr_trace_entry *trace_entry;
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
- trace_entry = &ioa_cfg->trace[ioa_cfg->trace_index++];
+ trace_entry = &ioa_cfg->trace[atomic_add_return
+ (1, &ioa_cfg->trace_index)%IPR_NUM_TRACE_ENTRIES];
trace_entry->time = jiffies;
trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
trace_entry->type = type;
@@ -563,6 +564,7 @@ static void ipr_trc_hook(struct ipr_cmnd
trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
trace_entry->u.add_data = add_data;
+ wmb();
}
#else
#define ipr_trc_hook(ipr_cmd, type, add_data) do { } while (0)
@@ -697,9 +699,15 @@ static void ipr_mask_and_clear_interrupt
u32 clr_ints)
{
volatile u32 int_reg;
+ int i;
/* Stop new interrupts */
- ioa_cfg->allow_interrupts = 0;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].allow_interrupts = 0;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
/* Set interrupt mask to stop all new interrupts */
if (ioa_cfg->sis64)
@@ -818,6 +826,7 @@ static void ipr_fail_all_ops(struct ipr_
ENTER;
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
list_for_each_entry_safe(ipr_cmd,
temp, &hrrq->hrrq_pending_q, queue) {
list_del(&ipr_cmd->queue);
@@ -837,6 +846,7 @@ static void ipr_fail_all_ops(struct ipr_
del_timer(&ipr_cmd->timer);
ipr_cmd->done(ipr_cmd);
}
+ spin_unlock(&hrrq->_lock);
}
LEAVE;
}
@@ -991,12 +1001,9 @@ static void ipr_send_blocking_cmd(struct
static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
{
if (ioa_cfg->hrrq_num == 1)
- ioa_cfg->hrrq_index = 0;
- else {
- if (++ioa_cfg->hrrq_index >= ioa_cfg->hrrq_num)
- ioa_cfg->hrrq_index = 1;
- }
- return ioa_cfg->hrrq_index;
+ return 0;
+ else
+ return (atomic_add_return(1, &ioa_cfg->hrrq_index) % (ioa_cfg->hrrq_num - 1)) + 1;
}
/**
@@ -1018,7 +1025,7 @@ static void ipr_send_hcam(struct ipr_ioa
struct ipr_cmnd *ipr_cmd;
struct ipr_ioarcb *ioarcb;
- if (ioa_cfg->allow_cmds) {
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
@@ -2564,7 +2571,7 @@ static int ipr_reset_reload(struct ipr_i
/* If we got hit with a host reset while we were already resetting
the adapter for some reason, and the reset failed. */
- if (ioa_cfg->ioa_is_dead) {
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
ipr_trace;
return FAILED;
}
@@ -3205,7 +3212,8 @@ static void ipr_worker_thread(struct wor
restart:
do {
did_work = 0;
- if (!ioa_cfg->allow_cmds || !ioa_cfg->allow_ml_add_del) {
+ if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds ||
+ !ioa_cfg->allow_ml_add_del) {
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
return;
}
@@ -3453,7 +3461,7 @@ static ssize_t ipr_show_adapter_state(st
int len;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
- if (ioa_cfg->ioa_is_dead)
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
len = snprintf(buf, PAGE_SIZE, "offline\n");
else
len = snprintf(buf, PAGE_SIZE, "online\n");
@@ -3479,14 +3487,20 @@ static ssize_t ipr_store_adapter_state(s
struct Scsi_Host *shost = class_to_shost(dev);
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
unsigned long lock_flags;
- int result = count;
+ int result = count, i;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
- if (ioa_cfg->ioa_is_dead && !strncmp(buf, "online", 6)) {
- ioa_cfg->ioa_is_dead = 0;
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead &&
+ !strncmp(buf, "online", 6)) {
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].ioa_is_dead = 0;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
ioa_cfg->reset_retries = 0;
ioa_cfg->in_ioa_bringdown = 0;
ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
@@ -4066,7 +4080,7 @@ static int ipr_alloc_dump(struct ipr_ioa
ioa_cfg->dump = dump;
ioa_cfg->sdt_state = WAIT_FOR_DUMP;
- if (ioa_cfg->ioa_is_dead && !ioa_cfg->dump_taken) {
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead && !ioa_cfg->dump_taken) {
ioa_cfg->dump_taken = 1;
schedule_work(&ioa_cfg->work_q);
}
@@ -4861,10 +4875,11 @@ static int __ipr_eh_dev_reset(struct scs
*/
if (ioa_cfg->in_reset_reload)
return FAILED;
- if (ioa_cfg->ioa_is_dead)
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
return FAILED;
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
if (ipr_cmd->ioarcb.res_handle == res->res_handle) {
if (ipr_cmd->scsi_cmd)
@@ -4878,6 +4893,7 @@ static int __ipr_eh_dev_reset(struct scs
}
}
}
+ spin_unlock(&hrrq->_lock);
}
res->resetting_device = 1;
scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
@@ -4889,6 +4905,7 @@ static int __ipr_eh_dev_reset(struct scs
spin_lock_irq(scsi_cmd->device->host->host_lock);
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
list_for_each_entry(ipr_cmd,
&hrrq->hrrq_pending_q, queue) {
if (ipr_cmd->ioarcb.res_handle ==
@@ -4897,6 +4914,7 @@ static int __ipr_eh_dev_reset(struct scs
break;
}
}
+ spin_unlock(&hrrq->_lock);
}
} else
rc = ipr_device_reset(ioa_cfg, res);
@@ -5020,7 +5038,8 @@ static int ipr_cancel_op(struct scsi_cmn
* This will force the mid-layer to call ipr_eh_host_reset,
* which will then go to sleep and wait for the reset to complete
*/
- if (ioa_cfg->in_reset_reload || ioa_cfg->ioa_is_dead)
+ if (ioa_cfg->in_reset_reload ||
+ ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
return FAILED;
if (!res)
return FAILED;
@@ -5036,6 +5055,7 @@ static int ipr_cancel_op(struct scsi_cmn
return FAILED;
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
if (ipr_cmd->scsi_cmd == scsi_cmd) {
ipr_cmd->done = ipr_scsi_eh_done;
@@ -5043,6 +5063,7 @@ static int ipr_cancel_op(struct scsi_cmn
break;
}
}
+ spin_unlock(&hrrq->_lock);
}
if (!op_found)
@@ -5112,6 +5133,7 @@ static irqreturn_t ipr_handle_other_inte
{
irqreturn_t rc = IRQ_HANDLED;
u32 int_mask_reg;
+
int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
int_reg &= ~int_mask_reg;
@@ -5173,6 +5195,7 @@ static irqreturn_t ipr_handle_other_inte
ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
}
+
return rc;
}
@@ -5205,7 +5228,7 @@ static int __ipr_process_hrrq(struct ipr
int num_hrrq = 0;
/* If interrupts are disabled, ignore the interrupt */
- if (!ioa_cfg->allow_interrupts)
+ if (!hrr_queue->allow_interrupts)
return 0;
while ((be32_to_cpu(*hrr_queue->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
@@ -5252,7 +5275,7 @@ static irqreturn_t ipr_isr(int irq, void
{
struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
- unsigned long lock_flags = 0;
+ unsigned long hrrq_flags = 0;
u32 int_reg = 0;
u32 ioasc;
u16 cmd_index;
@@ -5262,10 +5285,10 @@ static irqreturn_t ipr_isr(int irq, void
irqreturn_t rc = IRQ_NONE;
LIST_HEAD(doneq);
- spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ spin_lock_irqsave(hrrq->lock, hrrq_flags);
/* If interrupts are disabled, ignore the interrupt */
- if (!ioa_cfg->allow_interrupts) {
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ if (!hrrq->allow_interrupts) {
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return IRQ_NONE;
}
@@ -5332,7 +5355,7 @@ static irqreturn_t ipr_isr(int irq, void
rc = ipr_handle_other_interrupt(ioa_cfg, int_reg);
unlock_out:
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
list_del(&ipr_cmd->queue);
del_timer(&ipr_cmd->timer);
@@ -5352,17 +5375,16 @@ unlock_out:
static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
{
struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
- struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
- unsigned long lock_flags = 0;
+ unsigned long hrrq_flags = 0;
struct ipr_cmnd *ipr_cmd, *temp;
irqreturn_t rc = IRQ_NONE;
LIST_HEAD(doneq);
- spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ spin_lock_irqsave(hrrq->lock, hrrq_flags);
/* If interrupts are disabled, ignore the interrupt */
- if (!ioa_cfg->allow_interrupts) {
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ if (!hrrq->allow_interrupts) {
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return IRQ_NONE;
}
@@ -5372,7 +5394,7 @@ static irqreturn_t ipr_isr_mhrrq(int irq
if (__ipr_process_hrrq(hrrq, &doneq))
rc = IRQ_HANDLED;
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
list_del(&ipr_cmd->queue);
@@ -5965,14 +5987,14 @@ static void ipr_scsi_done(struct ipr_cmn
if (likely(IPR_IOASC_SENSE_KEY(ioasc) == 0)) {
scsi_dma_unmap(scsi_cmd);
- spin_lock_irqsave(ioa_cfg->host->host_lock, hrrq_flags);
+ spin_lock_irqsave(ipr_cmd->hrrq->lock, hrrq_flags);
list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
scsi_cmd->scsi_done(scsi_cmd);
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, hrrq_flags);
+ spin_unlock_irqrestore(ipr_cmd->hrrq->lock, hrrq_flags);
} else {
- spin_lock_irqsave(ioa_cfg->host->host_lock, hrrq_flags);
+ spin_lock_irqsave(ipr_cmd->hrrq->lock, hrrq_flags);
ipr_erp_start(ioa_cfg, ipr_cmd);
- spin_unlock_irqrestore(ioa_cfg->host->host_lock, hrrq_flags);
+ spin_unlock_irqrestore(ipr_cmd->hrrq->lock, hrrq_flags);
}
}
@@ -5995,26 +6017,34 @@ static int ipr_queuecommand(struct Scsi_
struct ipr_resource_entry *res;
struct ipr_ioarcb *ioarcb;
struct ipr_cmnd *ipr_cmd;
- unsigned long lock_flags;
+ unsigned long hrrq_flags, lock_flags;
int rc;
struct ipr_hrr_queue *hrrq;
int hrrq_id;
ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
- spin_lock_irqsave(shost->host_lock, lock_flags);
scsi_cmd->result = (DID_OK << 16);
res = scsi_cmd->device->hostdata;
+
+ if (ipr_is_gata(res) && res->sata_port) {
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ return rc;
+ }
+
hrrq_id = ipr_get_hrrq_index(ioa_cfg);
hrrq = &ioa_cfg->hrrq[hrrq_id];
+ spin_lock_irqsave(hrrq->lock, hrrq_flags);
/*
* We are currently blocking all devices due to a host reset
* We have told the host to stop giving us new requests, but
* ERP ops don't count. FIXME
*/
- if (unlikely(!ioa_cfg->allow_cmds && !ioa_cfg->ioa_is_dead)) {
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ if (unlikely(!hrrq->allow_cmds && !hrrq->ioa_is_dead)) {
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return SCSI_MLQUEUE_HOST_BUSY;
}
@@ -6022,23 +6052,17 @@ static int ipr_queuecommand(struct Scsi_
* FIXME - Create scsi_set_host_offline interface
* and the ioa_is_dead check can be removed
*/
- if (unlikely(ioa_cfg->ioa_is_dead || !res)) {
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ if (unlikely(hrrq->ioa_is_dead || !res)) {
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
goto err_nodev;
}
- if (ipr_is_gata(res) && res->sata_port) {
- rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
- return rc;
- }
-
ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
if (ipr_cmd == NULL) {
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return SCSI_MLQUEUE_HOST_BUSY;
}
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
ipr_init_ipr_cmnd(ipr_cmd, ipr_scsi_done);
ioarcb = &ipr_cmd->ioarcb;
@@ -6068,18 +6092,18 @@ static int ipr_queuecommand(struct Scsi_
else
rc = ipr_build_ioadl(ioa_cfg, ipr_cmd);
- spin_lock_irqsave(shost->host_lock, lock_flags);
- if (unlikely(rc || (!ioa_cfg->allow_cmds && !ioa_cfg->ioa_is_dead))) {
+ spin_lock_irqsave(hrrq->lock, hrrq_flags);
+ if (unlikely(rc || (!hrrq->allow_cmds && !hrrq->ioa_is_dead))) {
list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
if (!rc)
scsi_dma_unmap(scsi_cmd);
return SCSI_MLQUEUE_HOST_BUSY;
}
- if (unlikely(ioa_cfg->ioa_is_dead)) {
+ if (unlikely(hrrq->ioa_is_dead)) {
list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
scsi_dma_unmap(scsi_cmd);
goto err_nodev;
}
@@ -6092,15 +6116,15 @@ static int ipr_queuecommand(struct Scsi_
list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
ipr_send_command(ipr_cmd);
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return 0;
err_nodev:
- spin_lock_irqsave(shost->host_lock, lock_flags);
+ spin_lock_irqsave(hrrq->lock, hrrq_flags);
memset(scsi_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
scsi_cmd->result = (DID_NO_CONNECT << 16);
scsi_cmd->scsi_done(scsi_cmd);
- spin_unlock_irqrestore(shost->host_lock, lock_flags);
+ spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return 0;
}
@@ -6198,7 +6222,7 @@ static void ipr_ata_phy_reset(struct ata
spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
}
- if (!ioa_cfg->allow_cmds)
+ if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
goto out_unlock;
rc = ipr_device_reset(ioa_cfg, res);
@@ -6240,12 +6264,14 @@ static void ipr_ata_post_internal(struct
}
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
if (ipr_cmd->qc == qc) {
ipr_device_reset(ioa_cfg, sata_port->res);
break;
}
}
+ spin_unlock(&hrrq->_lock);
}
spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
}
@@ -6294,6 +6320,7 @@ static void ipr_sata_done(struct ipr_cmn
struct ipr_resource_entry *res = sata_port->res;
u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
+ spin_lock(&ipr_cmd->hrrq->_lock);
if (ipr_cmd->ioa_cfg->sis64)
memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
sizeof(struct ipr_ioasa_gata));
@@ -6310,6 +6337,7 @@ static void ipr_sata_done(struct ipr_cmn
else
qc->err_mask |= ac_err_mask(sata_port->ioasa.status);
list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
+ spin_unlock(&ipr_cmd->hrrq->_lock);
ata_qc_complete(qc);
}
@@ -6405,6 +6433,48 @@ static void ipr_build_ata_ioadl(struct i
}
/**
+ * ipr_qc_defer - Get a free ipr_cmd
+ * @qc: queued command
+ *
+ * Return value:
+ * 0 if success
+ **/
+static int ipr_qc_defer(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ipr_sata_port *sata_port = ap->private_data;
+ struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
+ struct ipr_cmnd *ipr_cmd;
+ struct ipr_hrr_queue *hrrq;
+ int hrrq_id;
+
+ hrrq_id = ipr_get_hrrq_index(ioa_cfg);
+ hrrq = &ioa_cfg->hrrq[hrrq_id];
+
+ qc->lldd_task = NULL;
+ spin_lock(&hrrq->_lock);
+ if (unlikely(hrrq->ioa_is_dead)) {
+ spin_unlock(&hrrq->_lock);
+ return 0;
+ }
+
+ if (unlikely(!hrrq->allow_cmds)) {
+ spin_unlock(&hrrq->_lock);
+ return ATA_DEFER_LINK;
+ }
+
+ ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
+ if (ipr_cmd == NULL) {
+ spin_unlock(&hrrq->_lock);
+ return ATA_DEFER_LINK;
+ }
+
+ qc->lldd_task = ipr_cmd;
+ spin_unlock(&hrrq->_lock);
+ return 0;
+}
+
+/**
* ipr_qc_issue - Issue a SATA qc to a device
* @qc: queued command
*
@@ -6420,15 +6490,23 @@ static unsigned int ipr_qc_issue(struct
struct ipr_cmnd *ipr_cmd;
struct ipr_ioarcb *ioarcb;
struct ipr_ioarcb_ata_regs *regs;
- struct ipr_hrr_queue *hrrq;
- int hrrq_id;
- if (unlikely(!ioa_cfg->allow_cmds || ioa_cfg->ioa_is_dead))
+ if (qc->lldd_task == NULL)
+ ipr_qc_defer(qc);
+
+ ipr_cmd = qc->lldd_task;
+ if (ipr_cmd == NULL)
return AC_ERR_SYSTEM;
- hrrq_id = ipr_get_hrrq_index(ioa_cfg);
- hrrq = &ioa_cfg->hrrq[hrrq_id];
- ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
+ qc->lldd_task = NULL;
+ spin_lock(&ipr_cmd->hrrq->_lock);
+ if (unlikely(!ipr_cmd->hrrq->allow_cmds ||
+ ipr_cmd->hrrq->ioa_is_dead)) {
+ list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
+ spin_unlock(&ipr_cmd->hrrq->_lock);
+ return AC_ERR_SYSTEM;
+ }
+
ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
ioarcb = &ipr_cmd->ioarcb;
@@ -6441,7 +6519,7 @@ static unsigned int ipr_qc_issue(struct
memset(regs, 0, sizeof(*regs));
ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(*regs));
- list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
+ list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
ipr_cmd->qc = qc;
ipr_cmd->done = ipr_sata_done;
ipr_cmd->ioarcb.res_handle = res->res_handle;
@@ -6481,10 +6559,12 @@ static unsigned int ipr_qc_issue(struct
default:
WARN_ON(1);
+ spin_unlock(&ipr_cmd->hrrq->_lock);
return AC_ERR_INVALID;
}
ipr_send_command(ipr_cmd);
+ spin_unlock(&ipr_cmd->hrrq->_lock);
return 0;
}
@@ -6523,6 +6603,7 @@ static struct ata_port_operations ipr_sa
.hardreset = ipr_sata_reset,
.post_internal_cmd = ipr_ata_post_internal,
.qc_prep = ata_noop_qc_prep,
+ .qc_defer = ipr_qc_defer,
.qc_issue = ipr_qc_issue,
.qc_fill_rtf = ipr_qc_fill_rtf,
.port_start = ata_sas_port_start,
@@ -6620,11 +6701,16 @@ static int ipr_ioa_reset_done(struct ipr
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
struct ipr_resource_entry *res;
struct ipr_hostrcb *hostrcb, *temp;
- int i = 0;
+ int i = 0, j;
ENTER;
ioa_cfg->in_reset_reload = 0;
- ioa_cfg->allow_cmds = 1;
+ for (j = 0; j < ioa_cfg->hrrq_num; j++) {
+ spin_lock(&ioa_cfg->hrrq[j]._lock);
+ ioa_cfg->hrrq[j].allow_cmds = 1;
+ spin_unlock(&ioa_cfg->hrrq[j]._lock);
+ }
+ wmb();
ioa_cfg->reset_cmd = NULL;
ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
@@ -6655,7 +6741,7 @@ static int ipr_ioa_reset_done(struct ipr
scsi_unblock_requests(ioa_cfg->host);
spin_lock(ioa_cfg->host->host_lock);
- if (!ioa_cfg->allow_cmds)
+ if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
scsi_block_requests(ioa_cfg->host);
LEAVE;
@@ -7452,8 +7538,8 @@ static int ipr_ioafp_identify_hrrq(struc
ipr_cmd->job_step = ipr_ioafp_std_inquiry;
dev_info(&ioa_cfg->pdev->dev, "Starting IOA initialization sequence.\n");
- if (ioa_cfg->hrrq_index < ioa_cfg->hrrq_num) {
- hrrq = &ioa_cfg->hrrq[ioa_cfg->hrrq_index];
+ if (ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num) {
+ hrrq = &ioa_cfg->hrrq[ioa_cfg->identify_hrrq_index];
ioarcb->cmd_pkt.cdb[0] = IPR_ID_HOST_RR_Q;
ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
@@ -7481,7 +7567,8 @@ static int ipr_ioafp_identify_hrrq(struc
(sizeof(u32) * hrrq->size) & 0xff;
if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
- ioarcb->cmd_pkt.cdb[9] = ioa_cfg->hrrq_index;
+ ioarcb->cmd_pkt.cdb[9] =
+ ioa_cfg->identify_hrrq_index;
if (ioa_cfg->sis64) {
ioarcb->cmd_pkt.cdb[10] =
@@ -7495,24 +7582,19 @@ static int ipr_ioafp_identify_hrrq(struc
}
if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
- ioarcb->cmd_pkt.cdb[14] = ioa_cfg->hrrq_index;
+ ioarcb->cmd_pkt.cdb[14] =
+ ioa_cfg->identify_hrrq_index;
ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
IPR_INTERNAL_TIMEOUT);
- if (++ioa_cfg->hrrq_index < ioa_cfg->hrrq_num)
- ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
+ if (++ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num)
+ ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
LEAVE;
return IPR_RC_JOB_RETURN;
-
}
- if (ioa_cfg->hrrq_num == 1)
- ioa_cfg->hrrq_index = 0;
- else
- ioa_cfg->hrrq_index = 1;
-
LEAVE;
return IPR_RC_JOB_CONTINUE;
}
@@ -7571,7 +7653,6 @@ static void ipr_reset_start_timer(struct
ipr_cmd->timer.expires = jiffies + timeout;
ipr_cmd->timer.function = (void (*)(unsigned long))ipr_reset_timer_done;
add_timer(&ipr_cmd->timer);
- LEAVE;
}
/**
@@ -7586,6 +7667,7 @@ static void ipr_init_ioa_mem(struct ipr_
struct ipr_hrr_queue *hrrq;
for_each_hrrq(hrrq, ioa_cfg) {
+ spin_lock(&hrrq->_lock);
memset(hrrq->host_rrq, 0, sizeof(u32) * hrrq->size);
/* Initialize Host RRQ pointers */
@@ -7593,9 +7675,15 @@ static void ipr_init_ioa_mem(struct ipr_
hrrq->hrrq_end = &hrrq->host_rrq[hrrq->size - 1];
hrrq->hrrq_curr = hrrq->hrrq_start;
hrrq->toggle_bit = 1;
+ spin_unlock(&hrrq->_lock);
}
+ wmb();
- ioa_cfg->hrrq_index = 0;
+ ioa_cfg->identify_hrrq_index = 0;
+ if (ioa_cfg->hrrq_num == 1)
+ atomic_set(&ioa_cfg->hrrq_index, 0);
+ else
+ atomic_set(&ioa_cfg->hrrq_index, 1);
/* Zero out config table */
memset(ioa_cfg->u.cfg_table, 0, ioa_cfg->cfg_table_size);
@@ -7673,12 +7761,18 @@ static int ipr_reset_enable_ioa(struct i
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
volatile u32 int_reg;
volatile u64 maskval;
+ int i;
ENTER;
ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
ipr_init_ioa_mem(ioa_cfg);
- ioa_cfg->allow_interrupts = 1;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].allow_interrupts = 1;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
if (ioa_cfg->sis64) {
/* Set the adapter to the correct endian mode. */
writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg);
@@ -8237,7 +8331,8 @@ static int ipr_reset_shutdown_ioa(struct
int rc = IPR_RC_JOB_CONTINUE;
ENTER;
- if (shutdown_type != IPR_SHUTDOWN_NONE && !ioa_cfg->ioa_is_dead) {
+ if (shutdown_type != IPR_SHUTDOWN_NONE &&
+ !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
ipr_cmd->ioarcb.cmd_pkt.cdb[0] = IPR_IOA_SHUTDOWN;
@@ -8321,9 +8416,15 @@ static void _ipr_initiate_ioa_reset(stru
enum ipr_shutdown_type shutdown_type)
{
struct ipr_cmnd *ipr_cmd;
+ int i;
ioa_cfg->in_reset_reload = 1;
- ioa_cfg->allow_cmds = 0;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].allow_cmds = 0;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
scsi_block_requests(ioa_cfg->host);
ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
@@ -8349,7 +8450,9 @@ static void _ipr_initiate_ioa_reset(stru
static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *ioa_cfg,
enum ipr_shutdown_type shutdown_type)
{
- if (ioa_cfg->ioa_is_dead)
+ int i;
+
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
return;
if (ioa_cfg->in_reset_reload) {
@@ -8364,7 +8467,12 @@ static void ipr_initiate_ioa_reset(struc
"IOA taken offline - error recovery failed\n");
ioa_cfg->reset_retries = 0;
- ioa_cfg->ioa_is_dead = 1;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].ioa_is_dead = 1;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
if (ioa_cfg->in_ioa_bringdown) {
ioa_cfg->reset_cmd = NULL;
@@ -8396,8 +8504,16 @@ static void ipr_initiate_ioa_reset(struc
*/
static int ipr_reset_freeze(struct ipr_cmnd *ipr_cmd)
{
+ struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
+ int i;
+
/* Disallow new interrupts, avoid loop */
- ipr_cmd->ioa_cfg->allow_interrupts = 0;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].allow_interrupts = 0;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
ipr_cmd->done = ipr_reset_ioa_job;
return IPR_RC_JOB_RETURN;
@@ -8455,13 +8571,19 @@ static void ipr_pci_perm_failure(struct
{
unsigned long flags = 0;
struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
+ int i;
spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
if (ioa_cfg->sdt_state == WAIT_FOR_DUMP)
ioa_cfg->sdt_state = ABORT_DUMP;
ioa_cfg->reset_retries = IPR_NUM_RESET_RELOAD_RETRIES;
ioa_cfg->in_ioa_bringdown = 1;
- ioa_cfg->allow_cmds = 0;
+ for (i = 0; i < ioa_cfg->hrrq_num; i++) {
+ spin_lock(&ioa_cfg->hrrq[i]._lock);
+ ioa_cfg->hrrq[i].allow_cmds = 0;
+ spin_unlock(&ioa_cfg->hrrq[i]._lock);
+ }
+ wmb();
ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
}
@@ -8522,7 +8644,7 @@ static int ipr_probe_ioa_part2(struct ip
wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
- if (ioa_cfg->ioa_is_dead) {
+ if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
rc = -EIO;
} else if (ipr_invalid_adapter(ioa_cfg)) {
if (!ipr_testmode)
@@ -8629,10 +8751,13 @@ static void ipr_free_all_resources(struc
} else
free_irq(pdev->irq, &ioa_cfg->hrrq[0]);
- if (ioa_cfg->intr_flag == IPR_USE_MSI)
+ if (ioa_cfg->intr_flag == IPR_USE_MSI) {
pci_disable_msi(pdev);
- else if (ioa_cfg->intr_flag == IPR_USE_MSIX)
+ ioa_cfg->intr_flag &= ~IPR_USE_MSI;
+ } else if (ioa_cfg->intr_flag == IPR_USE_MSIX) {
pci_disable_msix(pdev);
+ ioa_cfg->intr_flag &= ~IPR_USE_MSIX;
+ }
iounmap(ioa_cfg->hdw_dma_regs);
pci_release_regions(pdev);
@@ -8800,6 +8925,11 @@ static int ipr_alloc_mem(struct ipr_ioa_
for (i = 0; i < ioa_cfg->hrrq_num; i++) {
INIT_LIST_HEAD(&ioa_cfg->hrrq[i].hrrq_free_q);
INIT_LIST_HEAD(&ioa_cfg->hrrq[i].hrrq_pending_q);
+ spin_lock_init(&ioa_cfg->hrrq[i]._lock);
+ if (i == 0)
+ ioa_cfg->hrrq[i].lock = ioa_cfg->host->host_lock;
+ else
+ ioa_cfg->hrrq[i].lock = &ioa_cfg->hrrq[i]._lock;
}
if (ipr_alloc_cmd_blks(ioa_cfg))
@@ -9154,9 +9284,9 @@ static int ipr_test_msi(struct ipr_ioa_c
writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE, ioa_cfg->regs.sense_interrupt_reg32);
int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
wait_event_timeout(ioa_cfg->msi_wait_q, ioa_cfg->msi_received, HZ);
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
- spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
if (!ioa_cfg->msi_received) {
/* MSI test failed */
dev_info(&pdev->dev, "MSI test failed. Falling back to LSI.\n");
@@ -9189,6 +9319,7 @@ static int ipr_probe_ioa(struct pci_dev
void __iomem *ipr_regs;
int rc = PCIBIOS_SUCCESSFUL;
volatile u32 mask, uproc, interrupts;
+ unsigned long lock_flags;
ENTER;
@@ -9291,10 +9422,10 @@ static int ipr_probe_ioa(struct pci_dev
}
if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
- ipr_enable_msix(ioa_cfg) == 0)
+ ipr_enable_msix(ioa_cfg) == 0)
ioa_cfg->intr_flag = IPR_USE_MSIX;
else if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
- ipr_enable_msi(ioa_cfg) == 0)
+ ipr_enable_msi(ioa_cfg) == 0)
ioa_cfg->intr_flag = IPR_USE_MSI;
else {
ioa_cfg->intr_flag = IPR_USE_LSI;
@@ -9380,7 +9511,9 @@ static int ipr_probe_ioa(struct pci_dev
if (interrupts & IPR_PCII_IOA_UNIT_CHECKED)
ioa_cfg->ioa_unit_checked = 1;
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
if (ioa_cfg->intr_flag == IPR_USE_MSI
|| ioa_cfg->intr_flag == IPR_USE_MSIX) {
@@ -9767,7 +9900,7 @@ static int ipr_halt(struct notifier_bloc
list_for_each_entry(ioa_cfg, &ipr_ioa_head, queue) {
spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
- if (!ioa_cfg->allow_cmds) {
+ if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
continue;
}
Index: b/drivers/scsi/ipr.h
===================================================================
--- a/drivers/scsi/ipr.h 2013-01-11 13:38:09.752168134 -0600
+++ b/drivers/scsi/ipr.h 2013-01-11 16:10:56.114660090 -0600
@@ -482,17 +482,18 @@ struct ipr_hrr_queue {
struct list_head hrrq_free_q;
struct list_head hrrq_pending_q;
+ spinlock_t _lock;
+ spinlock_t *lock;
volatile u32 toggle_bit;
u32 size;
u32 min_cmd_id;
u32 max_cmd_id;
+ u8 allow_interrupts:1;
+ u8 ioa_is_dead:1;
+ u8 allow_cmds:1;
};
-#define for_each_hrrq(hrrq, ioa_cfg) \
- for (hrrq = (ioa_cfg)->hrrq; \
- hrrq < ((ioa_cfg)->hrrq + (ioa_cfg)->hrrq_num); hrrq++)
-
/* Command packet structure */
struct ipr_cmd_pkt {
u8 reserved; /* Reserved by IOA */
@@ -1057,6 +1058,10 @@ struct ipr_hostrcb64_fabric_desc {
struct ipr_hostrcb64_config_element elem[1];
}__attribute__((packed, aligned (8)));
+#define for_each_hrrq(hrrq, ioa_cfg) \
+ for (hrrq = (ioa_cfg)->hrrq; \
+ hrrq < ((ioa_cfg)->hrrq + (ioa_cfg)->hrrq_num); hrrq++)
+
#define for_each_fabric_cfg(fabric, cfg) \
for (cfg = (fabric)->elem; \
cfg < ((fabric)->elem + be16_to_cpu((fabric)->num_entries)); \
@@ -1411,13 +1416,10 @@ struct ipr_ioa_cfg {
struct list_head queue;
- u8 allow_interrupts:1;
u8 in_reset_reload:1;
u8 in_ioa_bringdown:1;
u8 ioa_unit_checked:1;
- u8 ioa_is_dead:1;
u8 dump_taken:1;
- u8 allow_cmds:1;
u8 allow_ml_add_del:1;
u8 needs_hard_reset:1;
u8 dual_raid:1;
@@ -1449,7 +1451,7 @@ struct ipr_ioa_cfg {
char trace_start[8];
#define IPR_TRACE_START_LABEL "trace"
struct ipr_trace_entry *trace;
- u32 trace_index:IPR_NUM_TRACE_INDEX_BITS;
+ atomic_t trace_index;
char cfg_table_start[8];
#define IPR_CFG_TBL_START "cfg"
@@ -1476,7 +1478,8 @@ struct ipr_ioa_cfg {
struct ipr_hrr_queue hrrq[IPR_MAX_HRRQ_NUM];
u32 hrrq_num;
- u32 hrrq_index;
+ atomic_t hrrq_index;
+ u16 identify_hrrq_index;
struct ipr_bus_attributes bus_attr[IPR_MAX_NUM_BUSES];
--
--
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