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| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2014-02-18 13:55:43 -0600 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2014-03-15 10:19:04 -0700 |
| commit | 76438d087f18fc0ce0431bf22e5195ec3db1656c (patch) | |
| tree | 8144e1687995df13849d68648fb166eab9f8f83c /drivers/scsi/hpsa_cmd.h | |
| parent | 250fb125ff94465a20429c4765f079aa142c9d80 (diff) | |
| download | linux-76438d087f18fc0ce0431bf22e5195ec3db1656c.tar.gz | |
[SCSI] hpsa: poll controller to detect device change event
For shared SAS configurations, hosts need to poll Smart Arrays periodically in order to be able to detect configuration changes such as logical drives being added or removed from remote hosts. A register on the controller indicates when such events have occurred, and the driver polls the register via a workqueue and kicks off a rescan of devices if such an event is detected. Additionally, changes to logical drive raid offload eligibility are autodetected in this way. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Scott Teel <scott.teel@hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/hpsa_cmd.h')
| -rw-r--r-- | drivers/scsi/hpsa_cmd.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h index c1ae8d2a6bf2..21f8a616e997 100644 --- a/drivers/scsi/hpsa_cmd.h +++ b/drivers/scsi/hpsa_cmd.h @@ -128,6 +128,7 @@ #define CFGTBL_AccCmds 0x00000001l #define DOORBELL_CTLR_RESET 0x00000004l #define DOORBELL_CTLR_RESET2 0x00000020l +#define DOORBELL_CLEAR_EVENTS 0x00000040l #define CFGTBL_Trans_Simple 0x00000002l #define CFGTBL_Trans_Performant 0x00000004l @@ -495,6 +496,8 @@ struct CfgTable { u32 io_accel_max_embedded_sg_count; u32 io_accel_request_size_offset; u32 event_notify; +#define HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE (1 << 30) +#define HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE (1 << 31) u32 clear_event_notify; }; |