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[SCSI] qla2xxx: fix for multiqueue in MISX disabled case

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Fix to accommodate a hardware bug in multiqueue mode that does not
 work properly when acknowledgement of MSIX Interrupts is disabled.

Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Anirban Chakraborty 2009-12-02 10:36:55 -08:00 committed by James Bottomley
parent c45dd30551
commit 3155754a6b
4 changed files with 27 additions and 2 deletions
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2
drivers/scsi/qla2xxx/qla_def.h
View file

@ -2262,6 +2262,7 @@ struct qla_hw_data {
uint32_t port0 :1;
uint32_t running_gold_fw :1;
uint32_t cpu_affinity_enabled :1;
uint32_t disable_msix_handshake :1;
} flags;
/* This spinlock is used to protect "io transactions", you must
@ -2384,6 +2385,7 @@ struct qla_hw_data {
#define IS_QLA81XX(ha) (IS_QLA8001(ha))
#define IS_QLA2XXX_MIDTYPE(ha) (IS_QLA24XX(ha) || IS_QLA84XX(ha) || \
IS_QLA25XX(ha) || IS_QLA81XX(ha))
#define IS_MSIX_NACK_CAPABLE(ha) (IS_QLA81XX(ha))
#define IS_NOPOLLING_TYPE(ha) ((IS_QLA25XX(ha) || IS_QLA81XX(ha)) && \
(ha)->flags.msix_enabled)
#define IS_FAC_REQUIRED(ha) (IS_QLA81XX(ha))

12
drivers/scsi/qla2xxx/qla_init.c
View file

@ -1442,7 +1442,17 @@ qla24xx_config_rings(struct scsi_qla_host *vha)
icb->firmware_options_2 |=
__constant_cpu_to_le32(BIT_18);
icb->firmware_options_2 &= __constant_cpu_to_le32(~BIT_22);
/* Use Disable MSIX Handshake mode for capable adapters */
if (IS_MSIX_NACK_CAPABLE(ha)) {
icb->firmware_options_2 &=
__constant_cpu_to_le32(~BIT_22);
ha->flags.disable_msix_handshake = 1;
qla_printk(KERN_INFO, ha,
"MSIX Handshake Disable Mode turned on\n");
} else {
icb->firmware_options_2 |=
__constant_cpu_to_le32(BIT_22);
}
icb->firmware_options_2 |= __constant_cpu_to_le32(BIT_23);
WRT_REG_DWORD(&reg->isp25mq.req_q_in, 0);

11
drivers/scsi/qla2xxx/qla_isr.c
View file

@ -1928,7 +1928,7 @@ qla24xx_msix_rsp_q(int irq, void *dev_id)
vha = qla25xx_get_host(rsp);
qla24xx_process_response_queue(vha, rsp);
if (!ha->mqenable) {
if (!ha->flags.disable_msix_handshake) {
WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
RD_REG_DWORD_RELAXED(&reg->hccr);
}
@ -1942,6 +1942,7 @@ qla25xx_msix_rsp_q(int irq, void *dev_id)
{
struct qla_hw_data *ha;
struct rsp_que *rsp;
struct device_reg_24xx __iomem *reg;
rsp = (struct rsp_que *) dev_id;
if (!rsp) {
@ -1951,6 +1952,14 @@ qla25xx_msix_rsp_q(int irq, void *dev_id)
}
ha = rsp->hw;
/* Clear the interrupt, if enabled, for this response queue */
if (rsp->options & ~BIT_6) {
reg = &ha->iobase->isp24;
spin_lock_irq(&ha->hardware_lock);
WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
RD_REG_DWORD_RELAXED(&reg->hccr);
spin_unlock_irq(&ha->hardware_lock);
}
queue_work_on((int) (rsp->id - 1), ha->wq, &rsp->q_work);
return IRQ_HANDLED;

4
drivers/scsi/qla2xxx/qla_mid.c
View file

@ -696,6 +696,10 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
/* Use alternate PCI devfn */
if (LSB(rsp->rid))
options |= BIT_5;
/* Enable MSIX handshake mode on for uncapable adapters */
if (!IS_MSIX_NACK_CAPABLE(ha))
options |= BIT_6;
rsp->options = options;
rsp->id = que_id;
reg = ISP_QUE_REG(ha, que_id);