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Commit 92f4f0f5 authored by Dan Williams's avatar Dan Williams
Browse files

isci: implement error isr 



Add basic support for handling/reporting error interrupts.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 77950f51

drivers/scsi/isci/core/scic_sds_controller.c

+6 −20
Original line number Diff line number Diff line
@@ -1937,18 +1937,12 @@ void scic_sds_controller_completion_handler(struct scic_sds_controller *scic) 
	SMU_IMR_WRITE(scic, 0x00000000);

}



/**

 * This is the method provided to handle the error MSIX message interrupt.

 *    This is the normal operating mode for the hardware if MSIX is enabled.

 *

 * bool true if an interrupt is processed false if no interrupt was processed

 */

static bool scic_sds_controller_error_vector_interrupt_handler(

	struct scic_sds_controller *scic)

bool scic_sds_controller_error_isr(struct scic_sds_controller *scic)

{

	u32 interrupt_status;



	interrupt_status = SMU_ISR_READ(scic);



	interrupt_status &= (SMU_ISR_QUEUE_ERROR | SMU_ISR_QUEUE_SUSPEND);



	if (interrupt_status != 0) {
@@ -1970,12 +1964,7 @@ static bool scic_sds_controller_error_vector_interrupt_handler( 
	return false;

}



/**

 * This is the method provided to handle the error completions when the

 *    hardware is using two MSIX messages.

 */

static void scic_sds_controller_error_vector_completion_handler(

	struct scic_sds_controller *scic)

void scic_sds_controller_error_handler(struct scic_sds_controller *scic)

{

	u32 interrupt_status;
@@ -1988,10 +1977,7 @@ static void scic_sds_controller_error_vector_completion_handler( 
		SMU_ISR_WRITE(scic, SMU_ISR_QUEUE_SUSPEND);



	} else {

		dev_err(scic_to_dev(scic),

			"%s: SCIC Controller reports CRC error on completion "

			"ISR %x\n",

			__func__,

		dev_err(scic_to_dev(scic), "%s: status: %#x\n", __func__,

			interrupt_status);



		sci_base_state_machine_change_state(
@@ -2585,9 +2571,9 @@ enum sci_status scic_controller_get_handler_methods( 
				= scic_sds_controller_completion_handler;



			handler_methods[1].interrupt_handler

				= scic_sds_controller_error_vector_interrupt_handler;

				= scic_sds_controller_error_isr;

			handler_methods[1].completion_handler

				= scic_sds_controller_error_vector_completion_handler;

				= scic_sds_controller_error_handler;



			status = SCI_SUCCESS;

		}

drivers/scsi/isci/host.c

+16 −0
Original line number Diff line number Diff line
@@ -85,11 +85,27 @@ irqreturn_t isci_intx_isr(int vec, void *data) 
		if (scic_sds_controller_isr(scic)) {

			tasklet_schedule(&ihost->completion_tasklet);

			ret = IRQ_HANDLED;

		} else if (scic_sds_controller_error_isr(scic)) {

			spin_lock(&ihost->scic_lock);

			scic_sds_controller_error_handler(scic);

			spin_unlock(&ihost->scic_lock);

			ret = IRQ_HANDLED;

		}

	}



	return ret;

}



irqreturn_t isci_error_isr(int vec, void *data)

{

	struct isci_host *ihost = data;

	struct scic_sds_controller *scic = ihost->core_controller;



	if (scic_sds_controller_error_isr(scic))

		scic_sds_controller_error_handler(scic);



	return IRQ_HANDLED;

}



/**

 * isci_host_start_complete() - This function is called by the core library,

drivers/scsi/isci/init.c

+8 −2
Original line number Diff line number Diff line
@@ -330,11 +330,17 @@ static int isci_setup_interrupts(struct pci_dev *pdev) 
		int id = i / SCI_NUM_MSI_X_INT;

		struct msix_entry *msix = &pci_info->msix_entries[i];

		struct isci_host *isci_host = isci_host_by_id(pdev, id);

		irq_handler_t isr;



		/* odd numbered vectors are error interrupts */

		if (i & 1)

			isr = isci_error_isr;

		else

			isr = isci_msix_isr;



		BUG_ON(!isci_host);



		/* @todo: need to handle error case. */

		err = devm_request_irq(&pdev->dev, msix->vector, isci_msix_isr, 0,

		err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,

				       DRV_NAME"-msix", isci_host);

		if (!err)

			continue;

drivers/scsi/isci/isci.h

+3 −0
Original line number Diff line number Diff line
@@ -115,9 +115,12 @@ struct isci_firmware { 


irqreturn_t isci_msix_isr(int vec, void *data);

irqreturn_t isci_intx_isr(int vec, void *data);

irqreturn_t isci_error_isr(int vec, void *data);



bool scic_sds_controller_isr(struct scic_sds_controller *scic);

void scic_sds_controller_completion_handler(struct scic_sds_controller *scic);

bool scic_sds_controller_error_isr(struct scic_sds_controller *scic);

void scic_sds_controller_error_handler(struct scic_sds_controller *scic);



enum sci_status isci_parse_oem_parameters(

	union scic_oem_parameters *oem_params,