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Commit 1d1166ea authored by Ching Huang's avatar Ching Huang Committed by Christoph Hellwig
Browse files

arcmsr: add code to support MSI-X and MSI interrupt 



This patch adds code to support MSI and MSI-X interrupt.

Signed-off-by: default avatarChing Huang <ching2048@areca.com.tw>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 6b393722

drivers/scsi/arcmsr/arcmsr.h

+5 −0
Original line number Diff line number Diff line
@@ -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 */

/*

*******************************************************************************

drivers/scsi/arcmsr/arcmsr_hba.c

+71 −12
Original line number Diff line number Diff line
@@ -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, \

						&reg->message_rwbuffer[0]);

			writel(cdb_phyaddr_hi32, &reg->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: {