diff options
author | Sakthivel K <Sakthivel.SaravananKamalRaju@pmcs.com> | 2013-03-19 12:26:17 (GMT) |
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committer | James Bottomley <JBottomley@Parallels.com> | 2013-05-10 14:47:47 (GMT) |
commit | 1245ee5996a1270e4fd04f9c2e399521a656c930 (patch) | |
tree | 162c4e63c70363e9debe13bad3d8178238860b00 /drivers/scsi/pm8001 | |
parent | f74cf271e692848833b3845b4036a87e5b683fa8 (diff) | |
download | linux-1245ee5996a1270e4fd04f9c2e399521a656c930.tar.xz |
[SCSI] pm80xx: MSI-X implementation for using 64 interrupts
Implementation of interrupt handlers and tasklets to support
upto 64 interrupt for the device.
Signed-off-by: Sakthivel K <Sakthivel.SaravananKamalRaju@pmcs.com>
Signed-off-by: Anand Kumar S <AnandKumar.Santhanam@pmcs.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/pm8001')
-rw-r--r-- | drivers/scsi/pm8001/pm8001_init.c | 141 | ||||
-rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.h | 2 |
2 files changed, 113 insertions, 30 deletions
diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index 19fbd03..75270ee 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -159,33 +159,71 @@ static void pm8001_free(struct pm8001_hba_info *pm8001_ha) } #ifdef PM8001_USE_TASKLET + +/** + * tasklet for 64 msi-x interrupt handler + * @opaque: the passed general host adapter struct + * Note: pm8001_tasklet is common for pm8001 & pm80xx + */ static void pm8001_tasklet(unsigned long opaque) { struct pm8001_hba_info *pm8001_ha; + u32 vec; pm8001_ha = (struct pm8001_hba_info *)opaque; if (unlikely(!pm8001_ha)) BUG_ON(1); - PM8001_CHIP_DISP->isr(pm8001_ha, 0); + vec = pm8001_ha->int_vector; + PM8001_CHIP_DISP->isr(pm8001_ha, vec); +} +#endif + +static struct pm8001_hba_info *outq_to_hba(u8 *outq) +{ + return container_of((outq - *outq), struct pm8001_hba_info, outq[0]); } + +/** + * pm8001_interrupt_handler_msix - main MSIX interrupt handler. + * It obtains the vector number and calls the equivalent bottom + * half or services directly. + * @opaque: the passed outbound queue/vector. Host structure is + * retrieved from the same. + */ +static irqreturn_t pm8001_interrupt_handler_msix(int irq, void *opaque) +{ + struct pm8001_hba_info *pm8001_ha = outq_to_hba(opaque); + u8 outq = *(u8 *)opaque; + irqreturn_t ret = IRQ_HANDLED; + if (unlikely(!pm8001_ha)) + return IRQ_NONE; + if (!PM8001_CHIP_DISP->is_our_interupt(pm8001_ha)) + return IRQ_NONE; + pm8001_ha->int_vector = outq; +#ifdef PM8001_USE_TASKLET + tasklet_schedule(&pm8001_ha->tasklet); +#else + ret = PM8001_CHIP_DISP->isr(pm8001_ha, outq); #endif + return ret; +} +/** + * pm8001_interrupt_handler_intx - main INTx interrupt handler. + * @dev_id: sas_ha structure. The HBA is retrieved from sas_has structure. + */ - /** - * pm8001_interrupt - when HBA originate a interrupt,we should invoke this - * dispatcher to handle each case. - * @irq: irq number. - * @opaque: the passed general host adapter struct - */ -static irqreturn_t pm8001_interrupt(int irq, void *opaque) +static irqreturn_t pm8001_interrupt_handler_intx(int irq, void *dev_id) { struct pm8001_hba_info *pm8001_ha; irqreturn_t ret = IRQ_HANDLED; - struct sas_ha_struct *sha = opaque; + struct sas_ha_struct *sha = dev_id; pm8001_ha = sha->lldd_ha; if (unlikely(!pm8001_ha)) return IRQ_NONE; if (!PM8001_CHIP_DISP->is_our_interupt(pm8001_ha)) return IRQ_NONE; + + pm8001_ha->int_vector = 0; #ifdef PM8001_USE_TASKLET tasklet_schedule(&pm8001_ha->tasklet); #else @@ -427,8 +465,12 @@ static struct pm8001_hba_info *pm8001_pci_alloc(struct pci_dev *pdev, pm8001_ha->iomb_size = IOMB_SIZE_SPC; #ifdef PM8001_USE_TASKLET + /** + * default tasklet for non msi-x interrupt handler/first msi-x + * interrupt handler + **/ tasklet_init(&pm8001_ha->tasklet, pm8001_tasklet, - (unsigned long)pm8001_ha); + (unsigned long)pm8001_ha); #endif pm8001_ioremap(pm8001_ha); if (!pm8001_alloc(pm8001_ha, ent)) @@ -591,31 +633,50 @@ static void pm8001_init_sas_add(struct pm8001_hba_info *pm8001_ha) * @chip_info: our ha struct. * @irq_handler: irq_handler */ -static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha, - irq_handler_t irq_handler) +static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha) { u32 i = 0, j = 0; - u32 number_of_intr = 1; + u32 number_of_intr; int flag = 0; u32 max_entry; int rc; + static char intr_drvname[PM8001_MAX_MSIX_VEC][sizeof(DRV_NAME)+3]; + + /* SPCv controllers supports 64 msi-x */ + if (pm8001_ha->chip_id == chip_8001) { + number_of_intr = 1; + flag |= IRQF_DISABLED; + } else { + number_of_intr = PM8001_MAX_MSIX_VEC; + flag &= ~IRQF_SHARED; + flag |= IRQF_DISABLED; + } + max_entry = sizeof(pm8001_ha->msix_entries) / sizeof(pm8001_ha->msix_entries[0]); - flag |= IRQF_DISABLED; for (i = 0; i < max_entry ; i++) pm8001_ha->msix_entries[i].entry = i; rc = pci_enable_msix(pm8001_ha->pdev, pm8001_ha->msix_entries, number_of_intr); pm8001_ha->number_of_intr = number_of_intr; if (!rc) { + PM8001_INIT_DBG(pm8001_ha, pm8001_printk( + "pci_enable_msix request ret:%d no of intr %d\n", + rc, pm8001_ha->number_of_intr)); + + for (i = 0; i < number_of_intr; i++) + pm8001_ha->outq[i] = i; + for (i = 0; i < number_of_intr; i++) { + snprintf(intr_drvname[i], sizeof(intr_drvname[0]), + DRV_NAME"%d", i); if (request_irq(pm8001_ha->msix_entries[i].vector, - irq_handler, flag, DRV_NAME, - SHOST_TO_SAS_HA(pm8001_ha->shost))) { + pm8001_interrupt_handler_msix, flag, + intr_drvname[i], &pm8001_ha->outq[i])) { for (j = 0; j < i; j++) free_irq( pm8001_ha->msix_entries[j].vector, - SHOST_TO_SAS_HA(pm8001_ha->shost)); + &pm8001_ha->outq[j]); pci_disable_msix(pm8001_ha->pdev); break; } @@ -632,22 +693,24 @@ static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha, static u32 pm8001_request_irq(struct pm8001_hba_info *pm8001_ha) { struct pci_dev *pdev; - irq_handler_t irq_handler = pm8001_interrupt; int rc; pdev = pm8001_ha->pdev; #ifdef PM8001_USE_MSIX if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) - return pm8001_setup_msix(pm8001_ha, irq_handler); - else + return pm8001_setup_msix(pm8001_ha); + else { + PM8001_INIT_DBG(pm8001_ha, + pm8001_printk("MSIX not supported!!!\n")); goto intx; + } #endif intx: /* initialize the INT-X interrupt */ - rc = request_irq(pdev->irq, irq_handler, IRQF_SHARED, DRV_NAME, - SHOST_TO_SAS_HA(pm8001_ha->shost)); + rc = request_irq(pdev->irq, pm8001_interrupt_handler_intx, IRQF_SHARED, + DRV_NAME, SHOST_TO_SAS_HA(pm8001_ha->shost)); return rc; } @@ -665,6 +728,7 @@ static int pm8001_pci_probe(struct pci_dev *pdev, { unsigned int rc; u32 pci_reg; + u8 i = 0; struct pm8001_hba_info *pm8001_ha; struct Scsi_Host *shost = NULL; const struct pm8001_chip_info *chip; @@ -729,6 +793,11 @@ static int pm8001_pci_probe(struct pci_dev *pdev, goto err_out_shost; PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, 0); + if (pm8001_ha->chip_id != chip_8001) { + for (i = 1; i < pm8001_ha->number_of_intr; i++) + PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, i); + } + pm8001_init_sas_add(pm8001_ha); pm8001_post_sas_ha_init(shost, chip); rc = sas_register_ha(SHOST_TO_SAS_HA(shost)); @@ -764,14 +833,15 @@ static void pm8001_pci_remove(struct pci_dev *pdev) sas_remove_host(pm8001_ha->shost); list_del(&pm8001_ha->list); scsi_remove_host(pm8001_ha->shost); - PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0); + PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF); PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha, 0x252acbcd); #ifdef PM8001_USE_MSIX for (i = 0; i < pm8001_ha->number_of_intr; i++) synchronize_irq(pm8001_ha->msix_entries[i].vector); for (i = 0; i < pm8001_ha->number_of_intr; i++) - free_irq(pm8001_ha->msix_entries[i].vector, sha); + free_irq(pm8001_ha->msix_entries[i].vector, + &pm8001_ha->outq[i]); pci_disable_msix(pdev); #else free_irq(pm8001_ha->irq, sha); @@ -808,13 +878,14 @@ static int pm8001_pci_suspend(struct pci_dev *pdev, pm_message_t state) printk(KERN_ERR " PCI PM not supported\n"); return -ENODEV; } - PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0); + PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF); PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha, 0x252acbcd); #ifdef PM8001_USE_MSIX for (i = 0; i < pm8001_ha->number_of_intr; i++) synchronize_irq(pm8001_ha->msix_entries[i].vector); for (i = 0; i < pm8001_ha->number_of_intr; i++) - free_irq(pm8001_ha->msix_entries[i].vector, sha); + free_irq(pm8001_ha->msix_entries[i].vector, + &pm8001_ha->outq[i]); pci_disable_msix(pdev); #else free_irq(pm8001_ha->irq, sha); @@ -843,6 +914,7 @@ static int pm8001_pci_resume(struct pci_dev *pdev) struct sas_ha_struct *sha = pci_get_drvdata(pdev); struct pm8001_hba_info *pm8001_ha; int rc; + u8 i = 0; u32 device_state; pm8001_ha = sha->lldd_ha; device_state = pdev->current_state; @@ -869,15 +941,24 @@ static int pm8001_pci_resume(struct pci_dev *pdev) rc = PM8001_CHIP_DISP->chip_init(pm8001_ha); if (rc) goto err_out_disable; - PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0); + + /* disable all the interrupt bits */ + PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF); + rc = pm8001_request_irq(pm8001_ha); if (rc) goto err_out_disable; - #ifdef PM8001_USE_TASKLET +#ifdef PM8001_USE_TASKLET + /* default tasklet for non msi-x interrupt handler/first msi-x + * interrupt handler */ tasklet_init(&pm8001_ha->tasklet, pm8001_tasklet, - (unsigned long)pm8001_ha); - #endif + (unsigned long)pm8001_ha); +#endif PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, 0); + if (pm8001_ha->chip_id != chip_8001) { + for (i = 1; i < pm8001_ha->number_of_intr; i++) + PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, i); + } scsi_unblock_requests(pm8001_ha->shost); return 0; diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h index e0faa95..8e281c8 100644 --- a/drivers/scsi/pm8001/pm8001_sas.h +++ b/drivers/scsi/pm8001/pm8001_sas.h @@ -453,7 +453,9 @@ struct pm8001_hba_info { #endif u32 logging_level; u32 fw_status; + u32 int_vector; const struct firmware *fw_image; + u8 outq[PM8001_MAX_MSIX_VEC]; }; struct pm8001_work { |