scsi: ufs: core: Remove HPB support

Interest among UFS users in HPB has reduced significantly. I am not aware
of any current users of the HPB functionality. Hence remove HPB support
from the kernel.

A note: the work in JEDEC on a successor for HPB is nearing completion.
Zoned storage for UFS or ZUFS combines the UFS standard with ZBC-2.

Acked-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: ChanWoo Lee <cw9316.lee@samsung.com>
Cc: Daejun Park <daejun7.park@samsung.com>
Cc: Keoseong Park <keosung.park@samsung.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230719165758.2787573-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

3 files changed, 0 insertions, 75 deletions

diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h
index a2bc025a748e..0dd546a20503 100644
--- a/include/ufs/ufs.h
+++ b/include/ufs/ufs.h
@@ -517,41 +517,6 @@ struct utp_cmd_rsp {
 	u8 sense_data[UFS_SENSE_SIZE];
 };
 
-struct ufshpb_active_field {
-	__be16 active_rgn;
-	__be16 active_srgn;
-};
-#define HPB_ACT_FIELD_SIZE 4
-
-/**
- * struct utp_hpb_rsp - Response UPIU structure
- * @residual_transfer_count: Residual transfer count DW-3
- * @reserved1: Reserved double words DW-4 to DW-7
- * @sense_data_len: Sense data length DW-8 U16
- * @desc_type: Descriptor type of sense data
- * @additional_len: Additional length of sense data
- * @hpb_op: HPB operation type
- * @lun: LUN of response UPIU
- * @active_rgn_cnt: Active region count
- * @inactive_rgn_cnt: Inactive region count
- * @hpb_active_field: Recommended to read HPB region and subregion
- * @hpb_inactive_field: To be inactivated HPB region and subregion
- */
-struct utp_hpb_rsp {
-	__be32 residual_transfer_count;
-	__be32 reserved1[4];
-	__be16 sense_data_len;
-	u8 desc_type;
-	u8 additional_len;
-	u8 hpb_op;
-	u8 lun;
-	u8 active_rgn_cnt;
-	u8 inactive_rgn_cnt;
-	struct ufshpb_active_field hpb_active_field[2];
-	__be16 hpb_inactive_field[2];
-};
-#define UTP_HPB_RSP_SIZE 40
-
 /**
  * struct utp_upiu_rsp - general upiu response structure
  * @header: UPIU header structure DW-0 to DW-2
@@ -562,7 +527,6 @@ struct utp_upiu_rsp {
 	struct utp_upiu_header header;
 	union {
 		struct utp_cmd_rsp sr;
-		struct utp_hpb_rsp hr;
 		struct utp_upiu_query qr;
 	};
 };
@@ -622,9 +586,6 @@ struct ufs_dev_info {
 	/* Stores the depth of queue in UFS device */
 	u8	bqueuedepth;
 
-	/* UFS HPB related flag */
-	bool	hpb_enabled;
-
 	/* UFS WB related flags */
 	bool    wb_enabled;
 	bool    wb_buf_flush_enabled;
diff --git a/include/ufs/ufs_quirks.h b/include/ufs/ufs_quirks.h
index bcb4f004bed5..41ff44dfa1db 100644
--- a/include/ufs/ufs_quirks.h
+++ b/include/ufs/ufs_quirks.h
@@ -107,10 +107,4 @@ struct ufs_dev_quirk {
  */
 #define UFS_DEVICE_QUIRK_DELAY_AFTER_LPM        (1 << 11)
 
-/*
- * Some UFS devices require L2P entry should be swapped before being sent to the
- * UFS device for HPB READ command.
- */
-#define UFS_DEVICE_QUIRK_SWAP_L2P_ENTRY_FOR_HPB_READ (1 << 12)
-
 #endif /* UFS_QUIRKS_H_ */
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 9f579640b909..fc80de57a4c6 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -709,31 +709,6 @@ struct ufs_hba_variant_params {
 	u32 wb_flush_threshold;
 };
 
-#ifdef CONFIG_SCSI_UFS_HPB
-/**
- * struct ufshpb_dev_info - UFSHPB device related info
- * @num_lu: the number of user logical unit to check whether all lu finished
- *          initialization
- * @rgn_size: device reported HPB region size
- * @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
- * @control_mode: either host or device
- */
-struct ufshpb_dev_info {
-	int num_lu;
-	int rgn_size;
-	int srgn_size;
-	atomic_t slave_conf_cnt;
-	bool hpb_disabled;
-	u8 max_hpb_single_cmd;
-	bool is_legacy;
-	u8 control_mode;
-};
-#endif
-
 struct ufs_hba_monitor {
 	unsigned long chunk_size;
 
@@ -894,7 +869,6 @@ enum ufshcd_mcq_opr {
  * @rpm_dev_flush_recheck_work: used to suspend from RPM (runtime power
  *	management) after the UFS device has finished a WriteBooster buffer
  *	flush or auto BKOP.
- * @ufshpb_dev: information related to HPB (Host Performance Booster).
  * @monitor: statistics about UFS commands
  * @crypto_capabilities: Content of crypto capabilities register (0x100)
  * @crypto_cap_array: Array of crypto capabilities
@@ -1050,10 +1024,6 @@ struct ufs_hba {
 	struct request_queue	*bsg_queue;
 	struct delayed_work rpm_dev_flush_recheck_work;
 
-#ifdef CONFIG_SCSI_UFS_HPB
-	struct ufshpb_dev_info ufshpb_dev;
-#endif
-
 	struct ufs_hba_monitor	monitor;
 
 #ifdef CONFIG_SCSI_UFS_CRYPTO