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| author | Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> | 2018-02-07 08:40:58 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-13 21:37:04 -0500 |
| commit | eee549e1e3a4ec87353a5b85a51a7896394981d5 (patch) | |
| tree | 9716f4e639c07ed541d917fa37d3c2783f1a6ab3 /drivers/scsi | |
| parent | a5799d74d965c8a04812ae6a6b26cafb2c099981 (diff) | |
| download | linux-stable-eee549e1e3a4ec87353a5b85a51a7896394981d5.tar.gz linux-stable-eee549e1e3a4ec87353a5b85a51a7896394981d5.tar.bz2 linux-stable-eee549e1e3a4ec87353a5b85a51a7896394981d5.zip | |
scsi: aacraid: Auto detect INTx or MSIx mode during sync cmd processing
During sync command processing, if legacy INTx status indicates command
is not completed, sample the MSIx register and check if it indicates
command completion, set controller MSIx enabled flag.
Signed-off-by: Prasad B Munirathnam <prasad.munirathnam@microsemi.com>
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/aacraid/aacraid.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/aacraid/src.c | 22 |
2 files changed, 17 insertions, 6 deletions
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index c3fdec9d817a..29bf1e60f542 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -1231,6 +1231,7 @@ struct src_registers { #define SRC_ODR_SHIFT 12 #define SRC_IDR_SHIFT 9 +#define SRC_MSI_READ_MASK 0x1000 typedef void (*fib_callback)(void *ctxt, struct fib *fibctx); diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c index 09b82d3325fc..3122389f380f 100644 --- a/drivers/scsi/aacraid/src.c +++ b/drivers/scsi/aacraid/src.c @@ -1405,13 +1405,23 @@ void aac_src_access_devreg(struct aac_dev *dev, int mode) static int aac_src_get_sync_status(struct aac_dev *dev) { + int msix_val = 0; + int legacy_val = 0; - int val; + msix_val = src_readl(dev, MUnit.ODR_MSI) & SRC_MSI_READ_MASK ? 1 : 0; - if (dev->msi_enabled) - val = src_readl(dev, MUnit.ODR_MSI) & 0x1000 ? 1 : 0; - else - val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT; + if (!dev->msi_enabled) { + /* + * if Legacy int status indicates cmd is not complete + * sample MSIx register to see if it indiactes cmd complete, + * if yes set the controller in MSIx mode and consider cmd + * completed + */ + legacy_val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT; + if (!(legacy_val & 1) && msix_val) + dev->msi_enabled = 1; + return legacy_val; + } - return val; + return msix_val; } |