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isci: bypass scic_controller_get_handler_methods()

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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 <jeff@garzik.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2011-02-18 09:25:05 -08:00
parent 11c8898629
commit c7ef4031f0
5 changed files with 43 additions and 144 deletions
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10
drivers/scsi/isci/core/scic_sds_controller.c
View File

@ -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;

154
drivers/scsi/isci/host.c
View File

@ -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;
struct isci_host *ihost = data;
struct scic_sds_controller *scic = ihost->core_controller;
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;
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];
for_each_isci_host(ihost, pdev) {
struct scic_sds_controller *scic = ihost->core_controller;
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,
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));

12
drivers/scsi/isci/host.h
View File

@ -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 */

4
drivers/scsi/isci/init.c
View File

@ -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;

7
drivers/scsi/isci/isci.h
View File

@ -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,