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| author | Daejun Park <daejun7.park@samsung.com> | 2021-07-12 12:00:25 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-08-01 23:05:07 +0300 |
| commit | 41d8a9333cc96f5ad4dd7a52786585338257d9f1 (patch) | |
| tree | 595fc1295e8565f6220fcc7ee18bf8a400c028a5 /drivers/scsi/ufs/ufshcd.h | |
| parent | 2fff76f87542fae2366448ec8b01dbff415a7d22 (diff) | |
| download | linux-41d8a9333cc96f5ad4dd7a52786585338257d9f1.tar.xz | |
scsi: ufs: ufshpb: Add HPB 2.0 support
Version 2.0 of HBP supports reads of varying sizes from 4KB to 1MB.
A read operation <= 32KB is supported as single HPB read. A read between
36KB and 1MB is supported by a combination of write buffer command and HPB
read command to deliver more PPN. The write buffer commands may not be
issued immediately due to busy tags. To use HPB read more aggressively, the
driver can requeue the write buffer command. The requeue threshold is
implemented as timeout and can be modified with requeue_timeout_ms entry in
sysfs.
[mkp: REQ_OP_DRV_* and blk_rq_is_passthrough()]
Link: https://lore.kernel.org/r/20210712090025epcms2p3b3d94f6f1b2cfa394e3d9ba130ca0fa7@epcms2p3
Tested-by: Can Guo <cang@codeaurora.org>
Tested-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.h')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 57d407be9e0a..84570501c3ac 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -650,6 +650,8 @@ struct ufs_hba_variant_params { * @srgn_size: device reported HPB sub-region size * @slave_conf_cnt: counter to check all lu finished initialization * @hpb_disabled: flag to check if HPB is disabled + * @max_hpb_single_cmd: device reported bMAX_DATA_SIZE_FOR_SINGLE_CMD value + * @is_legacy: flag to check HPB 1.0 */ struct ufshpb_dev_info { int num_lu; @@ -657,6 +659,8 @@ struct ufshpb_dev_info { int srgn_size; atomic_t slave_conf_cnt; bool hpb_disabled; + u8 max_hpb_single_cmd; + bool is_legacy; }; #endif @@ -1111,6 +1115,9 @@ int ufshcd_read_desc_param(struct ufs_hba *hba, u8 param_offset, u8 *param_read_buf, u8 param_size); +int ufshcd_query_attr_retry(struct ufs_hba *hba, enum query_opcode opcode, + enum attr_idn idn, u8 index, u8 selector, + u32 *attr_val); int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector, u32 *attr_val); int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode, |