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| author | Rishi Mehta <rmehta@vmware.com> | 2014-03-11 13:51:33 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2014-03-19 15:04:45 -0700 |
| commit | 2a815b5ac374d670f347f2d3a39db07105715398 (patch) | |
| tree | 8be49db5de5327ac0271efbe3fee7cb6560a2b2f /drivers/scsi/vmw_pvscsi.h | |
| parent | a2713cceb3a8efef8b86bec06f10689c95ddbc8c (diff) | |
| download | linux-stable-2a815b5ac374d670f347f2d3a39db07105715398.tar.gz linux-stable-2a815b5ac374d670f347f2d3a39db07105715398.tar.bz2 linux-stable-2a815b5ac374d670f347f2d3a39db07105715398.zip | |
[SCSI] vmw_pvscsi: Add support for I/O requests coalescing.
This change allows pvscsi driver to coalesce I/O requests
before issuing them. The number of I/O's coalesced can be
dynamically configured based on the workload.
Signed-off-by: Rishi Mehta <rmehta@vmware.com>
Signed-off-by: Arvind Kumar <arvindkumar@vmware.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/vmw_pvscsi.h')
| -rw-r--r-- | drivers/scsi/vmw_pvscsi.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/scsi/vmw_pvscsi.h b/drivers/scsi/vmw_pvscsi.h index a6437758384f..15a9ac68a50b 100644 --- a/drivers/scsi/vmw_pvscsi.h +++ b/drivers/scsi/vmw_pvscsi.h @@ -26,7 +26,7 @@ #include <linux/types.h> -#define PVSCSI_DRIVER_VERSION_STRING "1.0.3.0-k" +#define PVSCSI_DRIVER_VERSION_STRING "1.0.4.0-k" #define PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT 128 @@ -117,8 +117,9 @@ enum PVSCSICommands { PVSCSI_CMD_CONFIG = 7, PVSCSI_CMD_SETUP_MSG_RING = 8, PVSCSI_CMD_DEVICE_UNPLUG = 9, + PVSCSI_CMD_SETUP_REQCALLTHRESHOLD = 10, - PVSCSI_CMD_LAST = 10 /* has to be last */ + PVSCSI_CMD_LAST = 11 /* has to be last */ }; /* @@ -141,6 +142,14 @@ struct PVSCSICmdDescConfigCmd { u32 _pad; } __packed; +/* + * Command descriptor for PVSCSI_CMD_SETUP_REQCALLTHRESHOLD -- + */ + +struct PVSCSICmdDescSetupReqCall { + u32 enable; +} __packed; + enum PVSCSIConfigPageType { PVSCSI_CONFIG_PAGE_CONTROLLER = 0x1958, PVSCSI_CONFIG_PAGE_PHY = 0x1959, @@ -261,7 +270,9 @@ struct PVSCSIRingsState { u32 cmpConsIdx; u32 cmpNumEntriesLog2; - u8 _pad[104]; + u32 reqCallThreshold; + + u8 _pad[100]; u32 msgProdIdx; u32 msgConsIdx; |