diff options
| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2017-04-12 14:12:55 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-04-13 22:55:41 -0400 |
| commit | f918b4a8e6f8bb59c44045f85d10fd9cc7e5a4c0 (patch) | |
| tree | 99806162d9c6685b626b4c14f34388f98b2f5343 /drivers/scsi/cxlflash/common.h | |
| parent | 76a6ebbeef26b004c36a0c8ee0496bae5428fc31 (diff) | |
scsi: cxlflash: Serialize RRQ access and support offlevel processing
As further staging to support processing the HRRQ by other means, access to
the HRRQ needs to be serialized by a disabled lock. This will allow safe
access in other non-hardware interrupt contexts. In an effort to minimize the
period where interrupts are disabled, support is added to queue up commands
harvested from the RRQ such that they can be processed with hardware
interrupts enabled. While this doesn't offer any improvement with processing
on a hardware interrupt it will help when IRQ polling is supported and the
command completions can execute on softirq context.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxlflash/common.h')
| -rw-r--r-- | drivers/scsi/cxlflash/common.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index d11dcc59ff46..9d56b8c797c4 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -134,6 +134,7 @@ struct afu_cmd { struct afu *parent; struct scsi_cmnd *scp; struct completion cevent; + struct list_head queue; u8 cmd_tmf:1; @@ -181,6 +182,7 @@ struct afu { struct sisl_ioarcb *hsq_start; struct sisl_ioarcb *hsq_end; struct sisl_ioarcb *hsq_curr; + spinlock_t hrrq_slock; u64 *hrrq_start; u64 *hrrq_end; u64 *hrrq_curr; |