From 1d1166ea16ac7047a1b01f20dcbcc6f7754c3c23 Mon Sep 17 00:00:00 2001 From: Ching Huang Date: Tue, 19 Aug 2014 14:23:31 +0800 Subject: [PATCH] arcmsr: add code to support MSI-X and MSI interrupt This patch adds code to support MSI and MSI-X interrupt. Signed-off-by: Ching Huang Reviewed-by: Tomas Henzl Signed-off-by: Christoph Hellwig --- drivers/scsi/arcmsr/arcmsr.h | 5 ++ drivers/scsi/arcmsr/arcmsr_hba.c | 83 +++++++++++++++++++++++++++----- 2 files changed, 76 insertions(+), 12 deletions(-) diff --git a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h index 8f357933d8cb..1c64b60a3dcf 100644 --- a/drivers/scsi/arcmsr/arcmsr.h +++ b/drivers/scsi/arcmsr/arcmsr.h @@ -64,6 +64,7 @@ struct device_attribute; #define ARCMSR_MAX_HBB_POSTQUEUE 264 #define ARCMSR_MAX_XFER_LEN 0x26000 /* 152K */ #define ARCMSR_CDB_SG_PAGE_LENGTH 256 +#define ARCMST_NUM_MSIX_VECTORS 4 #ifndef PCI_DEVICE_ID_ARECA_1880 #define PCI_DEVICE_ID_ARECA_1880 0x1880 #endif @@ -508,6 +509,7 @@ struct AdapterControlBlock struct pci_dev * pdev; struct Scsi_Host * host; unsigned long vir2phy_offset; + struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS]; /* Offset is used in making arc cdb physical to virtual calculations */ uint32_t outbound_int_enable; uint32_t cdb_phyaddr_hi32; @@ -544,6 +546,8 @@ struct AdapterControlBlock /* iop init */ #define ACB_F_ABORT 0x0200 #define ACB_F_FIRMWARE_TRAP 0x0400 + #define ACB_F_MSI_ENABLED 0x1000 + #define ACB_F_MSIX_ENABLED 0x2000 struct CommandControlBlock * pccb_pool[ARCMSR_MAX_FREECCB_NUM]; /* used for memory free */ struct list_head ccb_free_list; @@ -594,6 +598,7 @@ struct AdapterControlBlock #define FW_DEADLOCK 0x0010 atomic_t rq_map_token; atomic_t ante_token_value; + int msix_vector_count; };/* HW_DEVICE_EXTENSION */ /* ******************************************************************************* diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 506fe7b851bc..60227d56bd39 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -603,6 +603,56 @@ static void arcmsr_message_isr_bh_fn(struct work_struct *work) } } +static int +arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb) +{ + int i, j, r; + struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS]; + + for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++) + entries[i].entry = i; + r = pci_enable_msix_range(pdev, entries, 1, ARCMST_NUM_MSIX_VECTORS); + if (r < 0) + goto msi_int; + acb->msix_vector_count = r; + for (i = 0; i < r; i++) { + if (request_irq(entries[i].vector, + arcmsr_do_interrupt, 0, "arcmsr", acb)) { + pr_warn("arcmsr%d: request_irq =%d failed!\n", + acb->host->host_no, entries[i].vector); + for (j = 0 ; j < i ; j++) + free_irq(entries[j].vector, acb); + pci_disable_msix(pdev); + goto msi_int; + } + acb->entries[i] = entries[i]; + } + acb->acb_flags |= ACB_F_MSIX_ENABLED; + pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no); + return SUCCESS; +msi_int: + if (pci_enable_msi_exact(pdev, 1) < 0) + goto legacy_int; + if (request_irq(pdev->irq, arcmsr_do_interrupt, + IRQF_SHARED, "arcmsr", acb)) { + pr_warn("arcmsr%d: request_irq =%d failed!\n", + acb->host->host_no, pdev->irq); + pci_disable_msi(pdev); + goto legacy_int; + } + acb->acb_flags |= ACB_F_MSI_ENABLED; + pr_info("arcmsr%d: msi enabled\n", acb->host->host_no); + return SUCCESS; +legacy_int: + if (request_irq(pdev->irq, arcmsr_do_interrupt, + IRQF_SHARED, "arcmsr", acb)) { + pr_warn("arcmsr%d: request_irq = %d failed!\n", + acb->host->host_no, pdev->irq); + return FAILED; + } + return SUCCESS; +} + static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct Scsi_Host *host; @@ -667,16 +717,13 @@ static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id) if(error){ goto free_hbb_mu; } - arcmsr_iop_init(acb); error = scsi_add_host(host, &pdev->dev); if(error){ goto RAID_controller_stop; } - error = request_irq(pdev->irq, arcmsr_do_interrupt, IRQF_SHARED, "arcmsr", acb); - if(error){ + if (arcmsr_request_irq(pdev, acb) == FAILED) goto scsi_host_remove; - } - host->irq = pdev->irq; + arcmsr_iop_init(acb); scsi_scan_host(host); INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn); atomic_set(&acb->rq_map_token, 16); @@ -710,6 +757,22 @@ pci_disable_dev: return -ENODEV; } +static void arcmsr_free_irq(struct pci_dev *pdev, + struct AdapterControlBlock *acb) +{ + int i; + + if (acb->acb_flags & ACB_F_MSI_ENABLED) { + free_irq(pdev->irq, acb); + pci_disable_msi(pdev); + } else if (acb->acb_flags & ACB_F_MSIX_ENABLED) { + for (i = 0; i < acb->msix_vector_count; i++) + free_irq(acb->entries[i].vector, acb); + pci_disable_msix(pdev); + } else + free_irq(pdev->irq, acb); +} + static uint8_t arcmsr_abort_hba_allcmd(struct AdapterControlBlock *acb) { struct MessageUnit_A __iomem *reg = acb->pmuA; @@ -992,6 +1055,7 @@ static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb) } } } + static void arcmsr_remove(struct pci_dev *pdev) { struct Scsi_Host *host = pci_get_drvdata(pdev); @@ -1029,7 +1093,7 @@ static void arcmsr_remove(struct pci_dev *pdev) } } } - free_irq(pdev->irq, acb); + arcmsr_free_irq(pdev, acb); arcmsr_free_ccb_pool(acb); arcmsr_free_hbb_mu(acb); arcmsr_unmap_pciregion(acb); @@ -1045,6 +1109,7 @@ static void arcmsr_shutdown(struct pci_dev *pdev) (struct AdapterControlBlock *)host->hostdata; del_timer_sync(&acb->eternal_timer); arcmsr_disable_outbound_ints(acb); + arcmsr_free_irq(pdev, acb); flush_work(&acb->arcmsr_do_message_isr_bh); arcmsr_stop_adapter_bgrb(acb); arcmsr_flush_adapter_cache(acb); @@ -2516,8 +2581,6 @@ static int arcmsr_iop_confirm(struct AdapterControlBlock *acb) case ACB_ADAPTER_TYPE_A: { if (cdb_phyaddr_hi32 != 0) { struct MessageUnit_A __iomem *reg = acb->pmuA; - uint32_t intmask_org; - intmask_org = arcmsr_disable_outbound_ints(acb); writel(ARCMSR_SIGNATURE_SET_CONFIG, \ ®->message_rwbuffer[0]); writel(cdb_phyaddr_hi32, ®->message_rwbuffer[1]); @@ -2529,7 +2592,6 @@ static int arcmsr_iop_confirm(struct AdapterControlBlock *acb) acb->host->host_no); return 1; } - arcmsr_enable_outbound_ints(acb, intmask_org); } } break; @@ -2539,8 +2601,6 @@ static int arcmsr_iop_confirm(struct AdapterControlBlock *acb) uint32_t __iomem *rwbuffer; struct MessageUnit_B *reg = acb->pmuB; - uint32_t intmask_org; - intmask_org = arcmsr_disable_outbound_ints(acb); reg->postq_index = 0; reg->doneq_index = 0; writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell); @@ -2569,7 +2629,6 @@ static int arcmsr_iop_confirm(struct AdapterControlBlock *acb) return 1; } arcmsr_hbb_enable_driver_mode(acb); - arcmsr_enable_outbound_ints(acb, intmask_org); } break; case ACB_ADAPTER_TYPE_C: { -- 2.20.1