diff options
author | Quinn Tran <quinn.tran@qlogic.com> | 2015-12-17 14:57:05 -0500 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-01-07 13:57:46 -0800 |
commit | cdb898c52d1dfad4b4800b83a58b3fe5d352edde (patch) | |
tree | a75040b860ca23bf650979950ca5c467e7c8670b /drivers/scsi/qla2xxx/qla_isr.c | |
parent | 7560151b6b3c1f4432c1c5b5b6496070d1f38484 (diff) |
qla2xxx: Add irq affinity notification
Register to receive notification of when irq setting change
occured.
Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_isr.c')
-rw-r--r-- | drivers/scsi/qla2xxx/qla_isr.c | 76 |
1 files changed, 75 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index ea7e8e8a065a..cf0fe8ec12c7 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -18,6 +18,10 @@ static void qla2x00_status_entry(scsi_qla_host_t *, struct rsp_que *, void *); static void qla2x00_status_cont_entry(struct rsp_que *, sts_cont_entry_t *); static void qla2x00_error_entry(scsi_qla_host_t *, struct rsp_que *, sts_entry_t *); +static void qla_irq_affinity_notify(struct irq_affinity_notify *, + const cpumask_t *); +static void qla_irq_affinity_release(struct kref *); + /** * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200. @@ -2548,6 +2552,14 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha, if (!vha->flags.online) return; + if (rsp->msix->cpuid != smp_processor_id()) { + /* if kernel does not notify qla of IRQ's CPU change, + * then set it here. + */ + rsp->msix->cpuid = smp_processor_id(); + ha->tgt.rspq_vector_cpuid = rsp->msix->cpuid; + } + while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) { pkt = (struct sts_entry_24xx *)rsp->ring_ptr; @@ -2979,8 +2991,11 @@ qla24xx_disable_msix(struct qla_hw_data *ha) for (i = 0; i < ha->msix_count; i++) { qentry = &ha->msix_entries[i]; - if (qentry->have_irq) + if (qentry->have_irq) { + /* un-register irq cpu affinity notification */ + irq_set_affinity_notifier(qentry->vector, NULL); free_irq(qentry->vector, qentry->rsp); + } } pci_disable_msix(ha->pdev); kfree(ha->msix_entries); @@ -3043,6 +3058,9 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp) qentry->entry = entries[i].entry; qentry->have_irq = 0; qentry->rsp = NULL; + qentry->irq_notify.notify = qla_irq_affinity_notify; + qentry->irq_notify.release = qla_irq_affinity_release; + qentry->cpuid = -1; } /* Enable MSI-X vectors for the base queue */ @@ -3061,6 +3079,18 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp) qentry->have_irq = 1; qentry->rsp = rsp; rsp->msix = qentry; + + /* Register for CPU affinity notification. */ + irq_set_affinity_notifier(qentry->vector, &qentry->irq_notify); + + /* Schedule work (ie. trigger a notification) to read cpu + * mask for this specific irq. + * kref_get is required because + * irq_affinity_notify() will do + * kref_put(). + */ + kref_get(&qentry->irq_notify.kref); + schedule_work(&qentry->irq_notify.work); } /* @@ -3240,3 +3270,47 @@ int qla25xx_request_irq(struct rsp_que *rsp) msix->rsp = rsp; return ret; } + + +/* irq_set_affinity/irqbalance will trigger notification of cpu mask update */ +static void qla_irq_affinity_notify(struct irq_affinity_notify *notify, + const cpumask_t *mask) +{ + struct qla_msix_entry *e = + container_of(notify, struct qla_msix_entry, irq_notify); + struct qla_hw_data *ha; + struct scsi_qla_host *base_vha; + + /* user is recommended to set mask to just 1 cpu */ + e->cpuid = cpumask_first(mask); + + ha = e->rsp->hw; + base_vha = pci_get_drvdata(ha->pdev); + + ql_dbg(ql_dbg_init, base_vha, 0xffff, + "%s: host %ld : vector %d cpu %d \n", __func__, + base_vha->host_no, e->vector, e->cpuid); + + if (e->have_irq) { + if ((IS_QLA83XX(ha) || IS_QLA27XX(ha)) && + (e->entry == QLA83XX_RSPQ_MSIX_ENTRY_NUMBER)) { + ha->tgt.rspq_vector_cpuid = e->cpuid; + ql_dbg(ql_dbg_init, base_vha, 0xffff, + "%s: host%ld: rspq vector %d cpu %d runtime change\n", + __func__, base_vha->host_no, e->vector, e->cpuid); + } + } +} + +void qla_irq_affinity_release(struct kref *ref) +{ + struct irq_affinity_notify *notify = + container_of(ref, struct irq_affinity_notify, kref); + struct qla_msix_entry *e = + container_of(notify, struct qla_msix_entry, irq_notify); + struct scsi_qla_host *base_vha = pci_get_drvdata(e->rsp->hw->pdev); + + ql_dbg(ql_dbg_init, base_vha, 0xffff, + "%s: host%ld: vector %d cpu %d \n", __func__, + base_vha->host_no, e->vector, e->cpuid); +} |