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authorDolev Raviv <draviv@codeaurora.org>2014-06-29 09:40:17 +0300
committerChristoph Hellwig <hch@lst.de>2014-07-25 17:17:01 -0400
commitd44a5f98bb49b2c15348fa65cee73df4a157bfbf (patch)
treec4ac73142a1d3d199481af1ba72b76649652b7e3 /drivers/scsi/ufs/ufs.h
parent6d67726bd898151e688d8729b3997ba8417c2c6b (diff)
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.h17
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,