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| author | Dolev Raviv <draviv@codeaurora.org> | 2014-06-29 09:40:17 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-07-25 17:17:01 -0400 |
| commit | d44a5f98bb49b2c15348fa65cee73df4a157bfbf (patch) | |
| tree | c4ac73142a1d3d199481af1ba72b76649652b7e3 /drivers/scsi/ufs/ufs.h | |
| parent | 6d67726bd898151e688d8729b3997ba8417c2c6b (diff) | |
| download | lwn-d44a5f98bb49b2c15348fa65cee73df4a157bfbf.tar.gz lwn-d44a5f98bb49b2c15348fa65cee73df4a157bfbf.zip | |
ufs: query descriptor API
Introduces the API for sending queries with descriptors.
A descriptor is a block or page of parameters that describe the device.
The descriptors are classified into types and can range in size
from 2 bytes through 255 bytes.
All descriptors have a length value as their first element, and a type
identification element as their second byte.
All descriptors are readable and some may be write once.
They are accessed using their type, index and selector.
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Raviv Shvili <rshvili@codeaurora.org>
Acked-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ufs/ufs.h')
| -rw-r--r-- | drivers/scsi/ufs/ufs.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index f42d1cee652a..1545cd7877d0 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -41,7 +41,8 @@ #define MAX_CDB_SIZE 16 #define GENERAL_UPIU_REQUEST_SIZE 32 -#define QUERY_DESC_MAX_SIZE 256 +#define QUERY_DESC_MAX_SIZE 255 +#define QUERY_DESC_MIN_SIZE 2 #define QUERY_OSF_SIZE (GENERAL_UPIU_REQUEST_SIZE - \ (sizeof(struct utp_upiu_header))) @@ -117,6 +118,20 @@ enum attr_idn { QUERY_ATTR_IDN_EE_STATUS = 0x0E, }; +/* Descriptor idn for Query requests */ +enum desc_idn { + QUERY_DESC_IDN_DEVICE = 0x0, + QUERY_DESC_IDN_CONFIGURAION = 0x1, + QUERY_DESC_IDN_UNIT = 0x2, + QUERY_DESC_IDN_RFU_0 = 0x3, + QUERY_DESC_IDN_INTERCONNECT = 0x4, + QUERY_DESC_IDN_STRING = 0x5, + QUERY_DESC_IDN_RFU_1 = 0x6, + QUERY_DESC_IDN_GEOMETRY = 0x7, + QUERY_DESC_IDN_POWER = 0x8, + QUERY_DESC_IDN_RFU_2 = 0x9, +}; + /* Exception event mask values */ enum { MASK_EE_STATUS = 0xFFFF, |