* [PATCH v1.1 2/16 update] arcmsr: Adding code to support MSI-X interrupt
@ 2014-05-05 11:15 ching
2014-05-05 12:53 ` Tomas Henzl
0 siblings, 1 reply; 3+ messages in thread
From: ching @ 2014-05-05 11:15 UTC (permalink / raw)
To: jbottomley, dan.carpenter, thenzl, linux-scsi,
linux-kernel@vger.kernel.org
From: Ching<ching2048@areca.com.tw>
Adding code for supporting MSI-X interrupt.
This update is for fixing bug of previous [PATCH v1.1 2/16].
Signed-off-by: Ching<ching2048@areca.com.tw>
---
diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
--- a/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:02:46.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:25:06.000000000 +0800
@@ -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;
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-04-28 15:58:34.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-05-05 18:57:03.000000000 +0800
@@ -603,6 +603,79 @@ static void arcmsr_message_isr_bh_fn(str
}
}
+static int
+arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb)
+{
+ int i, j, r;
+ struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
+
+ if (!pci_find_capability(pdev, PCI_CAP_ID_MSIX))
+ goto msi_int;
+ for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++)
+ entries[i].entry = i;
+ r = pci_enable_msix(pdev, entries, ARCMST_NUM_MSIX_VECTORS);
+ if (r < 0)
+ goto msi_int;
+ if (r == 0) {
+ for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; 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, pdev->irq);
+ 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 ARC_SUCCESS;
+ } else {
+ if (pci_enable_msix(pdev, entries, r))
+ goto msi_int;
+ 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, pdev->irq);
+ 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 ARC_SUCCESS;
+ }
+msi_int:
+ if (!pci_find_capability(pdev, PCI_CAP_ID_MSI))
+ goto legacy_int;
+ if (pci_enable_msi(pdev))
+ 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 ARC_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 ARC_FAILURE;
+ }
+ return ARC_SUCCESS;
+}
+
static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct Scsi_Host *host;
@@ -667,16 +740,13 @@ static int arcmsr_probe(struct pci_dev *
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) == ARC_FAILURE)
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);
@@ -992,6 +1062,22 @@ static void arcmsr_done4abort_postqueue(
}
}
}
+
+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 < ARCMST_NUM_MSIX_VECTORS; i++)
+ free_irq(acb->entries[i].vector, acb);
+ pci_disable_msix(pdev);
+ } else
+ free_irq(pdev->irq, acb);
+}
+
static void arcmsr_remove(struct pci_dev *pdev)
{
struct Scsi_Host *host = pci_get_drvdata(pdev);
@@ -1029,7 +1115,7 @@ static void arcmsr_remove(struct pci_dev
}
}
}
- 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 +1131,7 @@ static void arcmsr_shutdown(struct pci_d
(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 +2603,6 @@ static int arcmsr_iop_confirm(struct Ada
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 +2614,6 @@ static int arcmsr_iop_confirm(struct Ada
acb->host->host_no);
return 1;
}
- arcmsr_enable_outbound_ints(acb, intmask_org);
}
}
break;
@@ -2539,8 +2623,6 @@ static int arcmsr_iop_confirm(struct Ada
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 +2651,6 @@ static int arcmsr_iop_confirm(struct Ada
return 1;
}
arcmsr_hbb_enable_driver_mode(acb);
- arcmsr_enable_outbound_ints(acb, intmask_org);
}
break;
case ACB_ADAPTER_TYPE_C: {
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v1.1 2/16 update] arcmsr: Adding code to support MSI-X interrupt
2014-05-05 11:15 [PATCH v1.1 2/16 update] arcmsr: Adding code to support MSI-X interrupt ching
@ 2014-05-05 12:53 ` Tomas Henzl
2014-05-06 8:04 ` ching
0 siblings, 1 reply; 3+ messages in thread
From: Tomas Henzl @ 2014-05-05 12:53 UTC (permalink / raw)
To: ching, jbottomley, dan.carpenter, linux-scsi,
linux-kernel@vger.kernel.org
On 05/05/2014 01:15 PM, ching wrote:
> From: Ching<ching2048@areca.com.tw>
>
> Adding code for supporting MSI-X interrupt.
>
> This update is for fixing bug of previous [PATCH v1.1 2/16].
>
> Signed-off-by: Ching<ching2048@areca.com.tw>
> ---
>
> diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
> --- a/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:02:46.000000000 +0800
> +++ b/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:25:06.000000000 +0800
> @@ -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;
> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-04-28 15:58:34.000000000 +0800
> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-05-05 18:57:03.000000000 +0800
> @@ -603,6 +603,79 @@ static void arcmsr_message_isr_bh_fn(str
> }
> }
>
> +static int
> +arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb)
> +{
> + int i, j, r;
> + struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
> +
> + if (!pci_find_capability(pdev, PCI_CAP_ID_MSIX))
> + goto msi_int;
> + for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++)
> + entries[i].entry = i;
> + r = pci_enable_msix(pdev, entries, ARCMST_NUM_MSIX_VECTORS);
> + if (r < 0)
> + goto msi_int;
> + if (r == 0) {
> + for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; 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, pdev->irq);
> + 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 ARC_SUCCESS;
> + } else {
> + if (pci_enable_msix(pdev, entries, r))
> + goto msi_int;
> + 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, pdev->irq);
> + 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 ARC_SUCCESS;
> + }
Hi Ching, Dan,
the above construction might be simplified even a bit more -
if (r)
if (pci_enable_msix(pdev, entries, r))
goto msi_int;
else
r = ARCMST_NUM_MSIX_VECTORS;
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, pdev->irq);
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 ARC_SUCCESS;
Otherwise as Dan said the function looks now good
thanks, tomas
> +msi_int:
> + if (!pci_find_capability(pdev, PCI_CAP_ID_MSI))
> + goto legacy_int;
> + if (pci_enable_msi(pdev))
> + 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 ARC_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 ARC_FAILURE;
> + }
> + return ARC_SUCCESS;
> +}
> +
> static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> {
> struct Scsi_Host *host;
> @@ -667,16 +740,13 @@ static int arcmsr_probe(struct pci_dev *
> 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) == ARC_FAILURE)
> 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);
> @@ -992,6 +1062,22 @@ static void arcmsr_done4abort_postqueue(
> }
> }
> }
> +
> +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 < ARCMST_NUM_MSIX_VECTORS; i++)
> + free_irq(acb->entries[i].vector, acb);
> + pci_disable_msix(pdev);
> + } else
> + free_irq(pdev->irq, acb);
> +}
> +
> static void arcmsr_remove(struct pci_dev *pdev)
> {
> struct Scsi_Host *host = pci_get_drvdata(pdev);
> @@ -1029,7 +1115,7 @@ static void arcmsr_remove(struct pci_dev
> }
> }
> }
> - 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 +1131,7 @@ static void arcmsr_shutdown(struct pci_d
> (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 +2603,6 @@ static int arcmsr_iop_confirm(struct Ada
> 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 +2614,6 @@ static int arcmsr_iop_confirm(struct Ada
> acb->host->host_no);
> return 1;
> }
> - arcmsr_enable_outbound_ints(acb, intmask_org);
> }
> }
> break;
> @@ -2539,8 +2623,6 @@ static int arcmsr_iop_confirm(struct Ada
> 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 +2651,6 @@ static int arcmsr_iop_confirm(struct Ada
> return 1;
> }
> arcmsr_hbb_enable_driver_mode(acb);
> - arcmsr_enable_outbound_ints(acb, intmask_org);
> }
> break;
> case ACB_ADAPTER_TYPE_C: {
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v1.1 2/16 update] arcmsr: Adding code to support MSI-X interrupt
2014-05-05 12:53 ` Tomas Henzl
@ 2014-05-06 8:04 ` ching
0 siblings, 0 replies; 3+ messages in thread
From: ching @ 2014-05-06 8:04 UTC (permalink / raw)
To: Tomas Henzl
Cc: jbottomley, dan.carpenter, linux-scsi,
linux-kernel@vger.kernel.org
Thanks for Tomas' suggestion.
I will have a new update for this patch.
On Mon, 2014-05-05 at 14:53 +0200, Tomas Henzl wrote:
> On 05/05/2014 01:15 PM, ching wrote:
> > From: Ching<ching2048@areca.com.tw>
> >
> > Adding code for supporting MSI-X interrupt.
> >
> > This update is for fixing bug of previous [PATCH v1.1 2/16].
> >
> > Signed-off-by: Ching<ching2048@areca.com.tw>
> > ---
> >
> > diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
> > --- a/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:02:46.000000000 +0800
> > +++ b/drivers/scsi/arcmsr/arcmsr.h 2014-04-28 16:25:06.000000000 +0800
> > @@ -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;
> > diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> > --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-04-28 15:58:34.000000000 +0800
> > +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-05-05 18:57:03.000000000 +0800
> > @@ -603,6 +603,79 @@ static void arcmsr_message_isr_bh_fn(str
> > }
> > }
> >
> > +static int
> > +arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb)
> > +{
> > + int i, j, r;
> > + struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
> > +
> > + if (!pci_find_capability(pdev, PCI_CAP_ID_MSIX))
> > + goto msi_int;
> > + for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++)
> > + entries[i].entry = i;
> > + r = pci_enable_msix(pdev, entries, ARCMST_NUM_MSIX_VECTORS);
> > + if (r < 0)
> > + goto msi_int;
> > + if (r == 0) {
> > + for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; 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, pdev->irq);
> > + 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 ARC_SUCCESS;
> > + } else {
> > + if (pci_enable_msix(pdev, entries, r))
> > + goto msi_int;
> > + 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, pdev->irq);
> > + 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 ARC_SUCCESS;
> > + }
>
> Hi Ching, Dan,
> the above construction might be simplified even a bit more -
> if (r)
> if (pci_enable_msix(pdev, entries, r))
> goto msi_int;
> else
> r = ARCMST_NUM_MSIX_VECTORS;
>
> 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, pdev->irq);
> 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 ARC_SUCCESS;
> Otherwise as Dan said the function looks now good
> thanks, tomas
>
> > +msi_int:
> > + if (!pci_find_capability(pdev, PCI_CAP_ID_MSI))
> > + goto legacy_int;
> > + if (pci_enable_msi(pdev))
> > + 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 ARC_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 ARC_FAILURE;
> > + }
> > + return ARC_SUCCESS;
> > +}
> > +
> > static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> > {
> > struct Scsi_Host *host;
> > @@ -667,16 +740,13 @@ static int arcmsr_probe(struct pci_dev *
> > 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) == ARC_FAILURE)
> > 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);
> > @@ -992,6 +1062,22 @@ static void arcmsr_done4abort_postqueue(
> > }
> > }
> > }
> > +
> > +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 < ARCMST_NUM_MSIX_VECTORS; i++)
> > + free_irq(acb->entries[i].vector, acb);
> > + pci_disable_msix(pdev);
> > + } else
> > + free_irq(pdev->irq, acb);
> > +}
> > +
> > static void arcmsr_remove(struct pci_dev *pdev)
> > {
> > struct Scsi_Host *host = pci_get_drvdata(pdev);
> > @@ -1029,7 +1115,7 @@ static void arcmsr_remove(struct pci_dev
> > }
> > }
> > }
> > - 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 +1131,7 @@ static void arcmsr_shutdown(struct pci_d
> > (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 +2603,6 @@ static int arcmsr_iop_confirm(struct Ada
> > 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 +2614,6 @@ static int arcmsr_iop_confirm(struct Ada
> > acb->host->host_no);
> > return 1;
> > }
> > - arcmsr_enable_outbound_ints(acb, intmask_org);
> > }
> > }
> > break;
> > @@ -2539,8 +2623,6 @@ static int arcmsr_iop_confirm(struct Ada
> > 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 +2651,6 @@ static int arcmsr_iop_confirm(struct Ada
> > return 1;
> > }
> > arcmsr_hbb_enable_driver_mode(acb);
> > - arcmsr_enable_outbound_ints(acb, intmask_org);
> > }
> > break;
> > case ACB_ADAPTER_TYPE_C: {
> >
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-05-06 8:05 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-05-05 11:15 [PATCH v1.1 2/16 update] arcmsr: Adding code to support MSI-X interrupt ching
2014-05-05 12:53 ` Tomas Henzl
2014-05-06 8:04 ` ching
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