Adds support to find the hardware queue on which the request
would be queued.
Since the very first queue is to serve device commands, an offset
of 1 is added to the index of the hardware queue.
Co-developed-by: Can Guo <quic_cang@xxxxxxxxxxx>
Signed-off-by: Can Guo <quic_cang@xxxxxxxxxxx>
Signed-off-by: Asutosh Das <quic_asutoshd@xxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
---
drivers/ufs/core/ufs-mcq.c | 19 +++++++++++++++++++
drivers/ufs/core/ufshcd-priv.h | 3 +++
drivers/ufs/core/ufshcd.c | 3 +++
3 files changed, 25 insertions(+)
diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 6815825..be84bce 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -93,6 +93,25 @@ void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds)
}
/**
+ * ufshcd_mcq_req_to_hwq - find the hardware queue on which the
+ * request would be issued.
+ * @hba - per adapter instance
+ * @req - pointer to the request to be issued
+ *
+ * Returns the hardware queue instance on which the request would
+ * be queued.
+ */
+struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba,
+ struct request *req)
+{
+ u32 utag = blk_mq_unique_tag(req);
+ u32 hwq = blk_mq_unique_tag_to_hwq(utag);
+
+ /* uhq[0] is used to serve device commands */
+ return &hba->uhq[hwq + UFSHCD_MCQ_IO_QUEUE_OFFSET];
+}
+
+/**
* ufshcd_mcq_decide_queue_depth - decide the queue depth
* @hba - per adapter instance
*
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index 97f240b..0d408ed 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -67,7 +67,10 @@ int ufshcd_mcq_memory_alloc(struct ufs_hba *hba);
void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba);
void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds);
void ufshcd_mcq_select_mcq_mode(struct ufs_hba *hba);
+struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba,
+ struct request *req);
+#define UFSHCD_MCQ_IO_QUEUE_OFFSET 1
#define SD_ASCII_STD true
#define SD_RAW false
int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index e343aba..486c8f7 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -2935,6 +2935,9 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
goto out;
}
+ if (is_mcq_enabled(hba))
+ hwq = ufshcd_mcq_req_to_hwq(hba, scsi_cmd_to_rq(cmd));
+
ufshcd_send_command(hba, tag, hwq);
out:
--
2.7.4
