From c7ef4031f01301298bbaba2666740183cd399f8c Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 18 Feb 2011 09:25:05 -0800 Subject: [PATCH] isci: bypass scic_controller_get_handler_methods() The indirection is unecessary and broken in the current case that assigns the handlers based on a not up-to-date pdev->msix_enabled value. Route the handlers directly to the requisite core routines. Todo: hook up error interrupt handling Reported-by: Jeff Garzik Cc: Christoph Hellwig Signed-off-by: Edmund Nadolski Signed-off-by: Dan Williams --- drivers/scsi/isci/core/scic_sds_controller.c | 10 +- drivers/scsi/isci/host.c | 158 ++++++--------------------- drivers/scsi/isci/host.h | 12 -- drivers/scsi/isci/init.c | 4 +- drivers/scsi/isci/isci.h | 7 +- 5 files changed, 45 insertions(+), 146 deletions(-) diff --git a/drivers/scsi/isci/core/scic_sds_controller.c b/drivers/scsi/isci/core/scic_sds_controller.c index 6a32d91..cd8017f 100644 --- a/drivers/scsi/isci/core/scic_sds_controller.c +++ b/drivers/scsi/isci/core/scic_sds_controller.c @@ -1898,8 +1898,7 @@ static void scic_sds_controller_single_vector_completion_handler( * * bool true if an interrupt is processed false if no interrupt was processed */ -static bool scic_sds_controller_normal_vector_interrupt_handler( - struct scic_sds_controller *scic) +bool scic_sds_controller_isr(struct scic_sds_controller *scic) { if (scic_sds_controller_completion_queue_has_entries(scic)) { return true; @@ -1925,8 +1924,7 @@ static bool scic_sds_controller_normal_vector_interrupt_handler( * This is the method provided to handle the completions for a normal MSIX * message. */ -static void scic_sds_controller_normal_vector_completion_handler( - struct scic_sds_controller *scic) +void scic_sds_controller_completion_handler(struct scic_sds_controller *scic) { /* Empty out the completion queue */ if (scic_sds_controller_completion_queue_has_entries(scic)) @@ -2582,9 +2580,9 @@ enum sci_status scic_controller_get_handler_methods( status = SCI_SUCCESS; } else if (message_count == 2) { handler_methods[0].interrupt_handler - = scic_sds_controller_normal_vector_interrupt_handler; + = scic_sds_controller_isr; handler_methods[0].completion_handler - = scic_sds_controller_normal_vector_completion_handler; + = scic_sds_controller_completion_handler; handler_methods[1].interrupt_handler = scic_sds_controller_error_vector_interrupt_handler; diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 6f16f4d..b66e620 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -62,80 +62,49 @@ #include "request.h" #include "host.h" -/** - * isci_isr() - This function is the interrupt service routine for the - * controller. It schedules the tasklet and returns. - * @vec: This parameter specifies the interrupt vector. - * @data: This parameter specifies the ISCI host object. - * - * IRQ_HANDLED if out interrupt otherwise, IRQ_NONE - */ -irqreturn_t isci_isr(int vec, void *data) +irqreturn_t isci_msix_isr(int vec, void *data) { - struct isci_host *isci_host - = (struct isci_host *)data; - struct scic_controller_handler_methods *handlers - = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR]; - irqreturn_t ret = IRQ_NONE; - - if (isci_host_get_state(isci_host) != isci_starting - && handlers->interrupt_handler) { - - if (handlers->interrupt_handler(isci_host->core_controller)) { - if (isci_host_get_state(isci_host) != isci_stopped) { - tasklet_schedule( - &isci_host->completion_tasklet); - } else - dev_dbg(&isci_host->pdev->dev, - "%s: controller stopped\n", - __func__); - ret = IRQ_HANDLED; + struct isci_host *ihost = data; + struct scic_sds_controller *scic = ihost->core_controller; + + if (isci_host_get_state(ihost) != isci_starting) { + if (scic_sds_controller_isr(scic)) { + if (isci_host_get_state(ihost) != isci_stopped) + tasklet_schedule(&ihost->completion_tasklet); + else + dev_dbg(&ihost->pdev->dev, + "%s: controller stopped\n", __func__); } - } else - dev_warn(&isci_host->pdev->dev, - "%s: get_handler_methods failed, " - "isci_host->status = 0x%x\n", - __func__, - isci_host_get_state(isci_host)); + } - return ret; + return IRQ_HANDLED; } -irqreturn_t isci_legacy_isr(int vec, void *data) +irqreturn_t isci_intx_isr(int vec, void *data) { struct pci_dev *pdev = data; - struct isci_host *isci_host; - struct scic_controller_handler_methods *handlers; + struct isci_host *ihost; irqreturn_t ret = IRQ_NONE; - /* - * Since this is a legacy interrupt, either or both - * controllers could have triggered it. Thus, we have to call - * the legacy interrupt handler for all controllers on the - * PCI function. - */ - for_each_isci_host(isci_host, pdev) { - handlers = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR]; - - if (isci_host_get_state(isci_host) != isci_starting - && handlers->interrupt_handler) { - - if (handlers->interrupt_handler(isci_host->core_controller)) { - if (isci_host_get_state(isci_host) != isci_stopped) { - tasklet_schedule( - &isci_host->completion_tasklet); - } else - dev_dbg(&isci_host->pdev->dev, + for_each_isci_host(ihost, pdev) { + struct scic_sds_controller *scic = ihost->core_controller; + + if (isci_host_get_state(ihost) != isci_starting) { + if (scic_sds_controller_isr(scic)) { + if (isci_host_get_state(ihost) != isci_stopped) + tasklet_schedule(&ihost->completion_tasklet); + else + dev_dbg(&ihost->pdev->dev, "%s: controller stopped\n", __func__); ret = IRQ_HANDLED; } } else - dev_warn(&isci_host->pdev->dev, + dev_warn(&ihost->pdev->dev, "%s: get_handler_methods failed, " - "isci_host->status = 0x%x\n", + "ihost->status = 0x%x\n", __func__, - isci_host_get_state(isci_host)); + isci_host_get_state(ihost)); } return ret; } @@ -166,34 +135,9 @@ void isci_host_start_complete( } - - -/** - * isci_host_scan_finished() - This function is one of the SCSI Host Template - * functions. The SCSI midlayer calls this function during a target scan, - * approx. once every 10 millisecs. - * @shost: This parameter specifies the SCSI host being scanned - * @time: This parameter specifies the number of ticks since the scan started. - * - * scan status, zero indicates the SCSI midlayer should continue to poll, - * otherwise assume controller is ready. - */ -int isci_host_scan_finished( - struct Scsi_Host *shost, - unsigned long time) +int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time) { - struct isci_host *isci_host - = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost)); - - struct scic_controller_handler_methods *handlers - = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR]; - - if (handlers->interrupt_handler == NULL) { - dev_err(&isci_host->pdev->dev, - "%s: scic_controller_get_handler_methods failed\n", - __func__); - return 1; - } + struct isci_host *isci_host = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost)); /** * check interrupt_handler's status and call completion_handler if true, @@ -204,8 +148,8 @@ int isci_host_scan_finished( * continue to return zero from thee scan_finished routine until * the scic_cb_controller_start_complete() call comes from the core. **/ - if (handlers->interrupt_handler(isci_host->core_controller)) - handlers->completion_handler(isci_host->core_controller); + if (scic_sds_controller_isr(isci_host->core_controller)) + scic_sds_controller_completion_handler(isci_host->core_controller); if (isci_starting == isci_host_get_state(isci_host) && time < (HZ * 10)) { @@ -363,8 +307,6 @@ static int isci_host_mdl_allocate_coherent( static void isci_host_completion_routine(unsigned long data) { struct isci_host *isci_host = (struct isci_host *)data; - struct scic_controller_handler_methods *handlers - = &isci_host->scic_irq_handlers[SCI_MSIX_NORMAL_VECTOR]; struct list_head completed_request_list; struct list_head aborted_request_list; struct list_head *current_position; @@ -378,11 +320,8 @@ static void isci_host_completion_routine(unsigned long data) spin_lock_irq(&isci_host->scic_lock); - if (handlers->completion_handler) { - handlers->completion_handler( - isci_host->core_controller - ); - } + scic_sds_controller_completion_handler(isci_host->core_controller); + /* Take the lists of completed I/Os from the host. */ list_splice_init(&isci_host->requests_to_complete, &completed_request_list); @@ -544,8 +483,6 @@ int isci_host_init(struct isci_host *isci_host) enum sci_status status; struct scic_sds_controller *controller; struct scic_sds_port *scic_port; - struct scic_controller_handler_methods *handlers - = &isci_host->scic_irq_handlers[0]; union scic_oem_parameters scic_oem_params; union scic_user_parameters scic_user_params; const struct firmware *fw = NULL; @@ -691,35 +628,8 @@ int isci_host_init(struct isci_host *isci_host) goto out; } - /* @todo: use both MSI-X interrupts, and don't do indirect - * calls to the handlers just register direct calls - */ - if (isci_host->pdev->msix_enabled) { - status = scic_controller_get_handler_methods( - SCIC_MSIX_INTERRUPT_TYPE, - SCI_MSIX_DOUBLE_VECTOR, - handlers - ); - } else { - status = scic_controller_get_handler_methods( - SCIC_LEGACY_LINE_INTERRUPT_TYPE, - 0, - handlers - ); - } - - if (status != SCI_SUCCESS) { - handlers->interrupt_handler = NULL; - handlers->completion_handler = NULL; - dev_err(&isci_host->pdev->dev, - "%s: scic_controller_get_handler_methods failed\n", - __func__); - } - tasklet_init(&isci_host->completion_tasklet, - isci_host_completion_routine, - (unsigned long)isci_host - ); + isci_host_completion_routine, (unsigned long)isci_host); INIT_LIST_HEAD(&(isci_host->mdl_struct_list)); diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h index 4f4b99d..421d3de 100644 --- a/drivers/scsi/isci/host.h +++ b/drivers/scsi/isci/host.h @@ -53,13 +53,6 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/** - * This file contains the isci_module initialization routines. - * - * host.h - */ - - #if !defined(_SCI_HOST_H_) #define _SCI_HOST_H_ @@ -79,10 +72,6 @@ #define SCI_SCU_BAR_SIZE (4*1024*1024) #define SCI_IO_SPACE_BAR0 2 #define SCI_IO_SPACE_BAR1 3 -#define SCI_MSIX_NORMAL_VECTOR 0 -#define SCI_MSIX_ERROR_VECTOR 1 -#define SCI_MSIX_SINGLE_VECTOR 1 -#define SCI_MSIX_DOUBLE_VECTOR 2 #define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */ #define SCIC_CONTROLLER_STOP_TIMEOUT 5000 @@ -96,7 +85,6 @@ struct coherent_memory_info { struct isci_host { struct scic_sds_controller *core_controller; - struct scic_controller_handler_methods scic_irq_handlers[SCI_NUM_MSI_X_INT]; union scic_oem_parameters oem_parameters; int id; /* unique within a given pci device */ diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index e3d9b15..f2bd92b 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -334,7 +334,7 @@ static int isci_setup_interrupts(struct pci_dev *pdev) BUG_ON(!isci_host); /* @todo: need to handle error case. */ - err = devm_request_irq(&pdev->dev, msix->vector, isci_isr, 0, + err = devm_request_irq(&pdev->dev, msix->vector, isci_msix_isr, 0, DRV_NAME"-msix", isci_host); if (!err) continue; @@ -353,7 +353,7 @@ static int isci_setup_interrupts(struct pci_dev *pdev) return 0; intx: - err = devm_request_irq(&pdev->dev, pdev->irq, isci_legacy_isr, + err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx", pdev); return err; diff --git a/drivers/scsi/isci/isci.h b/drivers/scsi/isci/isci.h index 6aee3c9..3dc0f6c 100644 --- a/drivers/scsi/isci/isci.h +++ b/drivers/scsi/isci/isci.h @@ -113,8 +113,11 @@ struct isci_firmware { u8 sas_addrs_size; }; -irqreturn_t isci_isr(int vec, void *data); -irqreturn_t isci_legacy_isr(int vec, void *data); +irqreturn_t isci_msix_isr(int vec, void *data); +irqreturn_t isci_intx_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); enum sci_status isci_parse_oem_parameters( union scic_oem_parameters *oem_params, -- 2.7.4