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path: root/drivers/scsi/qla4xxx/ql4_isr.c
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Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_isr.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_isr.c406
1 files changed, 300 insertions, 106 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_isr.c b/drivers/scsi/qla4xxx/ql4_isr.c
index fc542a9bb10..15ea81465ce 100644
--- a/drivers/scsi/qla4xxx/ql4_isr.c
+++ b/drivers/scsi/qla4xxx/ql4_isr.c
@@ -1,6 +1,6 @@
/*
* QLogic iSCSI HBA Driver
- * Copyright (c) 2003-2010 QLogic Corporation
+ * Copyright (c) 2003-2012 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
@@ -126,7 +126,7 @@ static void qla4xxx_status_entry(struct scsi_qla_host *ha,
ql4_printk(KERN_WARNING, ha, "%s invalid status entry: "
"handle=0x%0x, srb=%p\n", __func__,
sts_entry->handle, srb);
- if (is_qla8022(ha))
+ if (is_qla80XX(ha))
set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
else
set_bit(DPC_RESET_HA, &ha->dpc_flags);
@@ -243,56 +243,72 @@ static void qla4xxx_status_entry(struct scsi_qla_host *ha,
scsi_set_resid(cmd, residual);
- /*
- * If there is scsi_status, it takes precedense over
- * underflow condition.
- */
- if (scsi_status != 0) {
- cmd->result = DID_OK << 16 | scsi_status;
+ if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) {
+
+ /* Both the firmware and target reported UNDERRUN:
+ *
+ * MID-LAYER UNDERFLOW case:
+ * Some kernels do not properly detect midlayer
+ * underflow, so we manually check it and return
+ * ERROR if the minimum required data was not
+ * received.
+ *
+ * ALL OTHER cases:
+ * Fall thru to check scsi_status
+ */
+ if (!scsi_status && (scsi_bufflen(cmd) - residual) <
+ cmd->underflow) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld:%d:%d:%d: %s: Mid-layer Data underrun, xferlen = 0x%x,residual = 0x%x\n",
+ ha->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, __func__,
+ scsi_bufflen(cmd),
+ residual));
- if (scsi_status != SCSI_CHECK_CONDITION)
+ cmd->result = DID_ERROR << 16;
break;
+ }
+
+ } else if (scsi_status != SAM_STAT_TASK_SET_FULL &&
+ scsi_status != SAM_STAT_BUSY) {
- /* Copy Sense Data into sense buffer. */
- qla4xxx_copy_sense(ha, sts_entry, srb);
- } else {
/*
- * If RISC reports underrun and target does not
- * report it then we must have a lost frame, so
- * tell upper layer to retry it by reporting a
- * bus busy.
+ * The firmware reports UNDERRUN, but the target does
+ * not report it:
+ *
+ * scsi_status | host_byte device_byte
+ * | (19:16) (7:0)
+ * ============= | ========= ===========
+ * TASK_SET_FULL | DID_OK scsi_status
+ * BUSY | DID_OK scsi_status
+ * ALL OTHERS | DID_ERROR scsi_status
+ *
+ * Note: If scsi_status is task set full or busy,
+ * then this else if would fall thru to check the
+ * scsi_status and return DID_OK.
*/
- if ((sts_entry->iscsiFlags &
- ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
- cmd->result = DID_BUS_BUSY << 16;
- } else if ((scsi_bufflen(cmd) - residual) <
- cmd->underflow) {
- /*
- * Handle mid-layer underflow???
- *
- * For kernels less than 2.4, the driver must
- * return an error if an underflow is detected.
- * For kernels equal-to and above 2.4, the
- * mid-layer will appearantly handle the
- * underflow by detecting the residual count --
- * unfortunately, we do not see where this is
- * actually being done. In the interim, we
- * will return DID_ERROR.
- */
- DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
- "Mid-layer Data underrun1, "
- "xferlen = 0x%x, "
- "residual = 0x%x\n", ha->host_no,
- cmd->device->channel,
- cmd->device->id,
- cmd->device->lun, __func__,
- scsi_bufflen(cmd), residual));
- cmd->result = DID_ERROR << 16;
- } else {
- cmd->result = DID_OK << 16;
- }
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld:%d:%d:%d: %s: Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
+ ha->host_no,
+ cmd->device->channel,
+ cmd->device->id,
+ cmd->device->lun, __func__,
+ residual,
+ scsi_bufflen(cmd)));
+
+ cmd->result = DID_ERROR << 16 | scsi_status;
+ goto check_scsi_status;
}
+
+ cmd->result = DID_OK << 16 | scsi_status;
+
+check_scsi_status:
+ if (scsi_status == SAM_STAT_CHECK_CONDITION)
+ qla4xxx_copy_sense(ha, sts_entry, srb);
+
break;
case SCS_DEVICE_LOGGED_OUT:
@@ -578,6 +594,14 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
{
int i;
uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
+ __le32 __iomem *mailbox_out;
+
+ if (is_qla8032(ha))
+ mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
+ else if (is_qla8022(ha))
+ mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
+ else
+ mailbox_out = &ha->reg->mailbox[0];
if ((mbox_status == MBOX_STS_BUSY) ||
(mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
@@ -590,9 +614,7 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
* location and set mailbox command done flag
*/
for (i = 0; i < ha->mbox_status_count; i++)
- ha->mbox_status[i] = is_qla8022(ha)
- ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
- : readl(&ha->reg->mailbox[i]);
+ ha->mbox_status[i] = readl(&mailbox_out[i]);
set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
@@ -601,9 +623,7 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
}
} else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
- mbox_sts[i] = is_qla8022(ha)
- ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
- : readl(&ha->reg->mailbox[i]);
+ mbox_sts[i] = readl(&mailbox_out[i]);
/* Immediately process the AENs that don't require much work.
* Only queue the database_changed AENs */
@@ -619,7 +639,8 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
qla4xxx_dump_registers(ha);
- if (ql4xdontresethba) {
+ if ((is_qla8022(ha) && ql4xdontresethba) ||
+ (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) {
DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
ha->host_no, __func__));
} else {
@@ -635,7 +656,7 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
case MBOX_ASTS_DHCP_LEASE_EXPIRED:
DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
"Reset HA\n", ha->host_no, mbox_status));
- if (is_qla8022(ha))
+ if (is_qla80XX(ha))
set_bit(DPC_RESET_HA_FW_CONTEXT,
&ha->dpc_flags);
else
@@ -700,7 +721,7 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
(mbox_sts[2] == ACB_STATE_VALID)) {
- if (is_qla8022(ha))
+ if (is_qla80XX(ha))
set_bit(DPC_RESET_HA_FW_CONTEXT,
&ha->dpc_flags);
else
@@ -785,6 +806,43 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
" removed\n", ha->host_no, mbox_sts[0]));
break;
+ case MBOX_ASTS_IDC_NOTIFY:
+ {
+ uint32_t opcode;
+ if (is_qla8032(ha)) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
+ ha->host_no, mbox_sts[0],
+ mbox_sts[1], mbox_sts[2],
+ mbox_sts[3], mbox_sts[4]));
+ opcode = mbox_sts[1] >> 16;
+ if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
+ (opcode == MBOX_CMD_PORT_RESET)) {
+ set_bit(DPC_POST_IDC_ACK,
+ &ha->dpc_flags);
+ ha->idc_info.request_desc = mbox_sts[1];
+ ha->idc_info.info1 = mbox_sts[2];
+ ha->idc_info.info2 = mbox_sts[3];
+ ha->idc_info.info3 = mbox_sts[4];
+ qla4xxx_wake_dpc(ha);
+ }
+ }
+ break;
+ }
+
+ case MBOX_ASTS_IDC_COMPLETE:
+ if (is_qla8032(ha)) {
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
+ ha->host_no, mbox_sts[0],
+ mbox_sts[1], mbox_sts[2],
+ mbox_sts[3], mbox_sts[4]));
+ DEBUG2(ql4_printk(KERN_INFO, ha,
+ "scsi:%ld: AEN %04x IDC Complete notification\n",
+ ha->host_no, mbox_sts[0]));
+ }
+ break;
+
default:
DEBUG2(printk(KERN_WARNING
"scsi%ld: AEN %04x UNKNOWN\n",
@@ -799,14 +857,31 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
}
}
+void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
+ uint32_t intr_status)
+{
+ /* Process mailbox/asynch event interrupt.*/
+ if (intr_status) {
+ qla4xxx_isr_decode_mailbox(ha,
+ readl(&ha->qla4_83xx_reg->mailbox_out[0]));
+ /* clear the interrupt */
+ writel(0, &ha->qla4_83xx_reg->risc_intr);
+ } else {
+ qla4xxx_process_response_queue(ha);
+ }
+
+ /* clear the interrupt */
+ writel(0, &ha->qla4_83xx_reg->mb_int_mask);
+}
+
/**
- * qla4_8xxx_interrupt_service_routine - isr
+ * qla4_82xx_interrupt_service_routine - isr
* @ha: pointer to host adapter structure.
*
* This is the main interrupt service routine.
* hardware_lock locked upon entry. runs in interrupt context.
**/
-void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
+void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
uint32_t intr_status)
{
/* Process response queue interrupt. */
@@ -816,11 +891,11 @@ void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
/* Process mailbox/asynch event interrupt.*/
if (intr_status & HSRX_RISC_MB_INT)
qla4xxx_isr_decode_mailbox(ha,
- readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
+ readl(&ha->qla4_82xx_reg->mailbox_out[0]));
/* clear the interrupt */
- writel(0, &ha->qla4_8xxx_reg->host_int);
- readl(&ha->qla4_8xxx_reg->host_int);
+ writel(0, &ha->qla4_82xx_reg->host_int);
+ readl(&ha->qla4_82xx_reg->host_int);
}
/**
@@ -850,12 +925,12 @@ void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
}
/**
- * qla4_8xxx_spurious_interrupt - processes spurious interrupt
+ * qla4_82xx_spurious_interrupt - processes spurious interrupt
* @ha: pointer to host adapter structure.
* @reqs_count: .
*
**/
-static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
+static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
uint8_t reqs_count)
{
if (reqs_count)
@@ -863,9 +938,9 @@ static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
if (is_qla8022(ha)) {
- writel(0, &ha->qla4_8xxx_reg->host_int);
+ writel(0, &ha->qla4_82xx_reg->host_int);
if (test_bit(AF_INTx_ENABLED, &ha->flags))
- qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
0xfbff);
}
ha->spurious_int_count++;
@@ -968,11 +1043,11 @@ irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
}
/**
- * qla4_8xxx_intr_handler - hardware interrupt handler.
+ * qla4_82xx_intr_handler - hardware interrupt handler.
* @irq: Unused
* @dev_id: Pointer to host adapter structure
**/
-irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
+irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
{
struct scsi_qla_host *ha = dev_id;
uint32_t intr_status;
@@ -984,11 +1059,11 @@ irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
return IRQ_HANDLED;
ha->isr_count++;
- status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
+ status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
if (!(status & ha->nx_legacy_intr.int_vec_bit))
return IRQ_NONE;
- status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
+ status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s legacy Int not triggered\n", __func__));
@@ -996,30 +1071,30 @@ irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
}
/* clear the interrupt */
- qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
/* read twice to ensure write is flushed */
- qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
- qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
spin_lock_irqsave(&ha->hardware_lock, flags);
while (1) {
- if (!(readl(&ha->qla4_8xxx_reg->host_int) &
+ if (!(readl(&ha->qla4_82xx_reg->host_int) &
ISRX_82XX_RISC_INT)) {
- qla4_8xxx_spurious_interrupt(ha, reqs_count);
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
break;
}
- intr_status = readl(&ha->qla4_8xxx_reg->host_status);
+ intr_status = readl(&ha->qla4_82xx_reg->host_status);
if ((intr_status &
(HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
- qla4_8xxx_spurious_interrupt(ha, reqs_count);
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
break;
}
ha->isp_ops->interrupt_service_routine(ha, intr_status);
/* Enable Interrupt */
- qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
break;
@@ -1029,6 +1104,59 @@ irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+#define LEG_INT_PTR_B31 (1 << 31)
+#define LEG_INT_PTR_B30 (1 << 30)
+#define PF_BITS_MASK (0xF << 16)
+
+/**
+ * qla4_83xx_intr_handler - hardware interrupt handler.
+ * @irq: Unused
+ * @dev_id: Pointer to host adapter structure
+ **/
+irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ uint32_t leg_int_ptr = 0;
+ unsigned long flags = 0;
+
+ ha->isr_count++;
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
+
+ /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
+ if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
+ ql4_printk(KERN_ERR, ha,
+ "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
+ __func__);
+ return IRQ_NONE;
+ }
+
+ /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
+ if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
+ ql4_printk(KERN_ERR, ha,
+ "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
+ __func__, (leg_int_ptr & PF_BITS_MASK), ha->pf_bit);
+ return IRQ_NONE;
+ }
+
+ /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
+ * Control register and poll till Legacy Interrupt Pointer register
+ * bit30 is 0.
+ */
+ writel(0, &ha->qla4_83xx_reg->leg_int_trig);
+ do {
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
+ if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
+ break;
+ } while (leg_int_ptr & LEG_INT_PTR_B30);
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
+ ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
irqreturn_t
qla4_8xxx_msi_handler(int irq, void *dev_id)
{
@@ -1043,15 +1171,46 @@ qla4_8xxx_msi_handler(int irq, void *dev_id)
ha->isr_count++;
/* clear the interrupt */
- qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
+ qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
/* read twice to ensure write is flushed */
- qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
- qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
+ qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
return qla4_8xxx_default_intr_handler(irq, dev_id);
}
+static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
+{
+ struct scsi_qla_host *ha = dev_id;
+ unsigned long flags;
+ uint32_t ival = 0;
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+
+ ival = readl(&ha->qla4_83xx_reg->risc_intr);
+ if (ival == 0) {
+ ql4_printk(KERN_INFO, ha,
+ "%s: It is a spurious mailbox interrupt!\n",
+ __func__);
+ ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
+ ival &= ~INT_MASK_FW_MB;
+ writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
+ goto exit;
+ }
+
+ qla4xxx_isr_decode_mailbox(ha,
+ readl(&ha->qla4_83xx_reg->mailbox_out[0]));
+ writel(0, &ha->qla4_83xx_reg->risc_intr);
+ ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
+ ival &= ~INT_MASK_FW_MB;
+ writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
+ ha->isr_count++;
+exit:
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ return IRQ_HANDLED;
+}
+
/**
* qla4_8xxx_default_intr_handler - hardware interrupt handler.
* @irq: Unused
@@ -1068,29 +1227,32 @@ qla4_8xxx_default_intr_handler(int irq, void *dev_id)
uint32_t intr_status;
uint8_t reqs_count = 0;
- spin_lock_irqsave(&ha->hardware_lock, flags);
- while (1) {
- if (!(readl(&ha->qla4_8xxx_reg->host_int) &
- ISRX_82XX_RISC_INT)) {
- qla4_8xxx_spurious_interrupt(ha, reqs_count);
- break;
- }
+ if (is_qla8032(ha)) {
+ qla4_83xx_mailbox_intr_handler(irq, dev_id);
+ } else {
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ while (1) {
+ if (!(readl(&ha->qla4_82xx_reg->host_int) &
+ ISRX_82XX_RISC_INT)) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
- intr_status = readl(&ha->qla4_8xxx_reg->host_status);
- if ((intr_status &
- (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
- qla4_8xxx_spurious_interrupt(ha, reqs_count);
- break;
- }
+ intr_status = readl(&ha->qla4_82xx_reg->host_status);
+ if ((intr_status &
+ (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
+ qla4_82xx_spurious_interrupt(ha, reqs_count);
+ break;
+ }
- ha->isp_ops->interrupt_service_routine(ha, intr_status);
+ ha->isp_ops->interrupt_service_routine(ha, intr_status);
- if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
- break;
+ if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
+ break;
+ }
+ ha->isr_count++;
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
-
- ha->isr_count++;
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;
}
@@ -1099,13 +1261,25 @@ qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
{
struct scsi_qla_host *ha = dev_id;
unsigned long flags;
+ uint32_t ival = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
- qla4xxx_process_response_queue(ha);
- writel(0, &ha->qla4_8xxx_reg->host_int);
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
-
+ if (is_qla8032(ha)) {
+ ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
+ if (ival == 0) {
+ ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
+ __func__);
+ goto exit_msix_rsp_q;
+ }
+ qla4xxx_process_response_queue(ha);
+ writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
+ } else {
+ qla4xxx_process_response_queue(ha);
+ writel(0, &ha->qla4_82xx_reg->host_int);
+ }
ha->isr_count++;
+exit_msix_rsp_q:
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;
}
@@ -1177,11 +1351,18 @@ int qla4xxx_request_irqs(struct scsi_qla_host *ha)
{
int ret;
- if (!is_qla8022(ha))
+ if (is_qla40XX(ha))
goto try_intx;
- if (ql4xenablemsix == 2)
+ if (ql4xenablemsix == 2) {
+ /* Note: MSI Interrupts not supported for ISP8324 */
+ if (is_qla8032(ha)) {
+ ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n",
+ __func__);
+ goto try_intx;
+ }
goto try_msi;
+ }
if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
goto try_intx;
@@ -1192,6 +1373,12 @@ int qla4xxx_request_irqs(struct scsi_qla_host *ha)
DEBUG2(ql4_printk(KERN_INFO, ha,
"MSI-X: Enabled (0x%X).\n", ha->revision_id));
goto irq_attached;
+ } else {
+ if (is_qla8032(ha)) {
+ ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n",
+ __func__, ret);
+ goto try_intx;
+ }
}
ql4_printk(KERN_WARNING, ha,
@@ -1214,9 +1401,15 @@ try_msi:
pci_disable_msi(ha->pdev);
}
}
- ql4_printk(KERN_WARNING, ha,
- "MSI: Falling back-to INTx mode -- %d.\n", ret);
+ /*
+ * Prevent interrupts from falling back to INTx mode in cases where
+ * interrupts cannot get acquired through MSI-X or MSI mode.
+ */
+ if (is_qla8022(ha)) {
+ ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
+ goto irq_not_attached;
+ }
try_intx:
/* Trying INTx */
ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
@@ -1230,7 +1423,7 @@ try_intx:
ql4_printk(KERN_WARNING, ha,
"INTx: Failed to reserve interrupt %d already in"
" use.\n", ha->pdev->irq);
- return ret;
+ goto irq_not_attached;
}
irq_attached:
@@ -1238,6 +1431,7 @@ irq_attached:
ha->host->irq = ha->pdev->irq;
ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
__func__, ha->pdev->irq);
+irq_not_attached:
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 02:33:47 +0000