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scsi: ufs: core: mcq: Find hardware queue to queue request

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Add 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@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Asutosh Das 2023-01-13 12:48:48 -08:00 committed by Martin K. Petersen
parent 22a2d563de
commit 854f84e7fe
3 changed files with 25 additions and 0 deletions
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19
drivers/ufs/core/ufs-mcq.c
View file

@ -92,6 +92,25 @@ void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds)
ufshcd_writel(hba, val, REG_UFS_MCQ_CFG);
}
/**
* 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

3
drivers/ufs/core/ufshcd-priv.h
View file

@ -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,

3
drivers/ufs/core/ufshcd.c
View file

@ -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: