[PATCH v2 13/17] ufs: core: Prepare for completion in mcq

Asutosh Das
2022-10-06T01:06:59Z

Modifies completion path APIs and adds completion queue
entry.

Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com>
---
drivers/ufs/core/ufshcd-priv.h | 2 ++
drivers/ufs/core/ufshcd.c | 80 ++++++++++++++++++++++++++----------------
2 files changed, 52 insertions(+), 30 deletions(-)

diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index 44ef266..62ae7e51 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -50,6 +50,8 @@ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
enum flag_idn idn, u8 index, bool *flag_res);
void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
+void ufshcd_compl_one_cqe(struct ufs_hba *hba, int task_tag,
+ struct cq_entry *cqe);
int ufshcd_mcq_init(struct ufs_hba *hba);
u32 ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba);
int ufshcd_mcq_memory_alloc(struct ufs_hba *hba);
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index e514c20..ac3b498 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -752,12 +752,17 @@ static inline bool ufshcd_is_device_present(struct ufs_hba *hba)
/**
* ufshcd_get_tr_ocs - Get the UTRD Overall Command Status
* @lrbp: pointer to local command reference block
+ * @cqe: pointer to the completion queue entry
*
* This function is used to get the OCS field from UTRD
* Returns the OCS field in the UTRD
*/
-static enum utp_ocs ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp)
+static enum utp_ocs ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp,
+ struct cq_entry *cqe)
{
+ if (cqe)
+ return le32_to_cpu(cqe->status) & MASK_OCS;
+
return le32_to_cpu(lrbp->utr_descriptor_ptr->header.dword_2) & MASK_OCS;
}

@@ -3009,7 +3014,7 @@ static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba,
spin_lock_irqsave(hba->host->host_lock, flags);
hba->dev_cmd.complete = NULL;
if (likely(time_left)) {
- err = ufshcd_get_tr_ocs(lrbp);
+ err = ufshcd_get_tr_ocs(lrbp, hba->dev_cmd.cqe);
if (!err)
err = ufshcd_dev_cmd_completion(hba, lrbp);
}
@@ -5199,18 +5204,20 @@ ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status)
* ufshcd_transfer_rsp_status - Get overall status of the response
* @hba: per adapter instance
* @lrbp: pointer to local reference block of completed command
+ * @cqe: pointer to the completion queue entry
*
* Returns result of the command to notify SCSI midlayer
*/
static inline int
-ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp,
+ struct cq_entry *cqe)
{
int result = 0;
int scsi_status;
enum utp_ocs ocs;

/* overall command status of utrd */
- ocs = ufshcd_get_tr_ocs(lrbp);
+ ocs = ufshcd_get_tr_ocs(lrbp, cqe);

if (hba->quirks & UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR) {
if (be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_1) &
@@ -5375,41 +5382,54 @@ static void ufshcd_release_scsi_cmd(struct ufs_hba *hba,
}

/**
- * __ufshcd_transfer_req_compl - handle SCSI and query command completion
+ * ufshcd_compl_one_cqe - handle a completion queue entry
* @hba: per adapter instance
- * @completed_reqs: bitmask that indicates which requests to complete
+ * @task_tag: the task tag of the request to be completed
+ * @cqe: pointer to the completion queue entry
*/
-static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
- unsigned long completed_reqs)
+void ufshcd_compl_one_cqe(struct ufs_hba *hba, int task_tag,
+ struct cq_entry *cqe)
{
struct ufshcd_lrb *lrbp;
struct scsi_cmnd *cmd;
- int index;
-
- for_each_set_bit(index, &completed_reqs, hba->nutrs) {
- lrbp = &hba->lrb[index];
- lrbp->compl_time_stamp = ktime_get();
- cmd = lrbp->cmd;
- if (cmd) {
- if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
- ufshcd_update_monitor(hba, lrbp);
- ufshcd_add_command_trace(hba, index, UFS_CMD_COMP);
- cmd->result = ufshcd_transfer_rsp_status(hba, lrbp);
- ufshcd_release_scsi_cmd(hba, lrbp);
- /* Do not touch lrbp after scsi done */
- scsi_done(cmd);
- } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE ||
- lrbp->command_type == UTP_CMD_TYPE_UFS_STORAGE) {
- if (hba->dev_cmd.complete) {
- ufshcd_add_command_trace(hba, index,
- UFS_DEV_COMP);
- complete(hba->dev_cmd.complete);
- ufshcd_clk_scaling_update_busy(hba);
- }
+
+ lrbp = &hba->lrb[task_tag];
+ lrbp->compl_time_stamp = ktime_get();
+ cmd = lrbp->cmd;
+ if (cmd) {
+ if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
+ ufshcd_update_monitor(hba, lrbp);
+ ufshcd_add_command_trace(hba, task_tag, UFS_CMD_COMP);
+ cmd->result = ufshcd_transfer_rsp_status(hba, lrbp, cqe);
+ ufshcd_release_scsi_cmd(hba, lrbp);
+ /* Do not touch lrbp after scsi done */
+ scsi_done(cmd);
+ } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE ||
+ lrbp->command_type == UTP_CMD_TYPE_UFS_STORAGE) {
+ if (hba->dev_cmd.complete) {
+ hba->dev_cmd.cqe = cqe;
+ ufshcd_add_command_trace(hba, task_tag, UFS_DEV_COMP);
+ complete(hba->dev_cmd.complete);
+ ufshcd_clk_scaling_update_busy(hba);
}
}
}

+
+/**
+ * __ufshcd_transfer_req_compl - handle SCSI and query command completion
+ * @hba: per adapter instance
+ * @completed_reqs: bitmask that indicates which requests to complete
+ */
+static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
+ unsigned long completed_reqs)
+{
+ int tag;
+
+ for_each_set_bit(tag, &completed_reqs, hba->nutrs)
+ ufshcd_compl_one_cqe(hba, tag, NULL);
+}
+
/*
* Returns > 0 if one or more commands have been completed or 0 if no
* requests have been completed.
--
2.7.4