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scsi: ufs: Add compatibility with 3.1 UFS unit descriptor length

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For UFS 3.1, the normal unit descriptor is 10 bytes larger than the RPMB
unit. However, both descriptors share the same desc_idn, to cover both unit
descriptors with one length, we choose the normal unit descriptor length by
desc_index.

Link: https://lore.kernel.org/r/20200603091959.27618-6-huobean@gmail.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bean Huo 2020-06-03 11:19:59 +02:00 committed by Martin K. Petersen
parent 7a0bf85b5e
commit 72fb690eec
2 changed files with 9 additions and 3 deletions
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1
drivers/scsi/ufs/ufs.h
View File

@ -63,6 +63,7 @@
#define UFS_UPIU_MAX_UNIT_NUM_ID 0x7F
#define UFS_MAX_LUNS (SCSI_W_LUN_BASE + UFS_UPIU_MAX_UNIT_NUM_ID)
#define UFS_UPIU_WLUN_ID (1 << 7)
#define UFS_RPMB_UNIT 0xC4
/* WriteBooster buffer is available only for the logical unit from 0 to 7 */
#define UFS_UPIU_MAX_WB_LUN_ID 8

11
drivers/scsi/ufs/ufshcd.c
View File

@ -3083,11 +3083,16 @@ void ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
EXPORT_SYMBOL(ufshcd_map_desc_id_to_length);
static void ufshcd_update_desc_length(struct ufs_hba *hba,
enum desc_idn desc_id,
enum desc_idn desc_id, int desc_index,
unsigned char desc_len)
{
if (hba->desc_size[desc_id] == QUERY_DESC_MAX_SIZE &&
desc_id != QUERY_DESC_IDN_STRING)
desc_id != QUERY_DESC_IDN_STRING && desc_index != UFS_RPMB_UNIT)
/* For UFS 3.1, the normal unit descriptor is 10 bytes larger
* than the RPMB unit, however, both descriptors share the same
* desc_idn, to cover both unit descriptors with one length, we
* choose the normal unit descriptor length by desc_index.
*/
hba->desc_size[desc_id] = desc_len;
}
@ -3156,7 +3161,7 @@ int ufshcd_read_desc_param(struct ufs_hba *hba,
/* Update descriptor length */
buff_len = desc_buf[QUERY_DESC_LENGTH_OFFSET];
ufshcd_update_desc_length(hba, desc_id, buff_len);
ufshcd_update_desc_length(hba, desc_id, desc_index, buff_len);
/* Check wherher we will not copy more data, than available */
if (is_kmalloc && (param_offset + param_size) > buff_len)