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Message-ID: <96084be6bc6259fb62ab61cfbc31159bba235bba.1670445699.git.quic_asutoshd@quicinc.com>
Date: Wed, 7 Dec 2022 12:46:21 -0800
From: Asutosh Das <quic_asutoshd@...cinc.com>
To: <quic_cang@...cinc.com>, <martin.petersen@...cle.com>,
<linux-scsi@...r.kernel.org>
CC: <quic_nguyenb@...cinc.com>, <quic_xiaosenh@...cinc.com>,
<stanley.chu@...iatek.com>, <eddie.huang@...iatek.com>,
<daejun7.park@...sung.com>, <bvanassche@....org>,
<avri.altman@....com>, <mani@...nel.org>, <beanhuo@...ron.com>,
Asutosh Das <quic_asutoshd@...cinc.com>,
<linux-arm-msm@...r.kernel.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
Jinyoung Choi <j-young.choi@...sung.com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v10 10/16] ufs: core: mcq: Use shared tags for MCQ mode
Enable shared tags for MCQ. For UFS, this should
not have a huge performance impact. It however
simplifies the MCQ implementation and reuses most of
the existing code in the issue and completion path.
Also add multiple queue mapping to map_queue().
Co-developed-by: Can Guo <quic_cang@...cinc.com>
Signed-off-by: Can Guo <quic_cang@...cinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
---
drivers/ufs/core/ufs-mcq.c | 2 ++
drivers/ufs/core/ufshcd.c | 28 ++++++++++++++++------------
2 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 496e2b6..8bf222f 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -280,6 +280,7 @@ void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba)
int ufshcd_mcq_init(struct ufs_hba *hba)
{
+ struct Scsi_Host *host = hba->host;
struct ufs_hw_queue *hwq;
int ret, i;
@@ -315,5 +316,6 @@ int ufshcd_mcq_init(struct ufs_hba *hba)
/* Give dev_cmd_queue the minimal number of entries */
hba->dev_cmd_queue->max_entries = MAX_DEV_CMD_ENTRIES;
+ host->host_tagset = 1;
return 0;
}
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 5d14d3f..21cfa37 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -2763,24 +2763,28 @@ static inline bool is_device_wlun(struct scsi_device *sdev)
*/
static void ufshcd_map_queues(struct Scsi_Host *shost)
{
- int i;
+ struct ufs_hba *hba = shost_priv(shost);
+ int i, queue_offset = 0;
+
+ if (!is_mcq_supported(hba)) {
+ hba->nr_queues[HCTX_TYPE_DEFAULT] = 1;
+ hba->nr_queues[HCTX_TYPE_READ] = 0;
+ hba->nr_queues[HCTX_TYPE_POLL] = 1;
+ hba->nr_hw_queues = 1;
+ }
for (i = 0; i < shost->nr_maps; i++) {
struct blk_mq_queue_map *map = &shost->tag_set.map[i];
- switch (i) {
- case HCTX_TYPE_DEFAULT:
- case HCTX_TYPE_POLL:
- map->nr_queues = 1;
- break;
- case HCTX_TYPE_READ:
- map->nr_queues = 0;
+ map->nr_queues = hba->nr_queues[i];
+ if (!map->nr_queues)
continue;
- default:
- WARN_ON_ONCE(true);
- }
- map->queue_offset = 0;
+ map->queue_offset = queue_offset;
+ if (i == HCTX_TYPE_POLL && !is_mcq_supported(hba))
+ map->queue_offset = 0;
+
blk_mq_map_queues(map);
+ queue_offset += map->nr_queues;
}
}
--
2.7.4
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