From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
Bart Van Assche <bvanassche@acm.org>,
Hannes Reinecke <hare@suse.com>,
John Garry <john.garry@huawei.com>,
Don Brace <don.brace@microsemi.com>,
Kashyap Desai <kashyap.desai@broadcom.com>,
Sathya Prakash <sathya.prakash@broadcom.com>,
Christoph Hellwig <hch@lst.de>, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH 5/9] scsi: introduce scsi_cmnd_hctx_index()
Date: Fri, 31 May 2019 10:27:57 +0800 [thread overview]
Message-ID: <20190531022801.10003-6-ming.lei@redhat.com> (raw)
In-Reply-To: <20190531022801.10003-1-ming.lei@redhat.com>
For drivers which enable .host_tagset, introduce scsi_cmnd_hctx_index
to retrieve current reply queue index. If valid scsi command is provided,
blk-mq's hw queue's index is returned, otherwise return the queue
mapped from current CPU.
Prepare for converting device's privete reply queue to blk-mq hw queue.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/scsi/scsi_cmnd.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 76ed5e4acd38..23f611a6a9f2 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -9,6 +9,7 @@
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/scatterlist.h>
+#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_request.h>
@@ -332,4 +333,18 @@ static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
return xfer_len;
}
+/* only for drivers which enable .host_tagset */
+static inline unsigned scsi_cmnd_hctx_index(struct Scsi_Host *sh,
+ struct scsi_cmnd *scmd)
+{
+ if (unlikely(!scmd || !scmd->request || !scmd->request->mq_hctx)) {
+ struct blk_mq_queue_map *qmap =
+ &sh->tag_set.map[HCTX_TYPE_DEFAULT];
+
+ return qmap->mq_map[raw_smp_processor_id()];
+ }
+
+ return scmd->request->mq_hctx->queue_num;
+}
+
#endif /* _SCSI_SCSI_CMND_H */
--
2.20.1
next prev parent reply other threads:[~2019-05-31 2:28 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-31 2:27 [PATCH 0/9] blk-mq/scsi: convert private reply queue into blk_mq hw queue Ming Lei
2019-05-31 2:27 ` [PATCH 1/9] blk-mq: allow hw queues to share hostwide tags Ming Lei
2019-05-31 6:07 ` Hannes Reinecke
2019-05-31 15:37 ` Bart Van Assche
2019-06-24 8:44 ` Ming Lei
2019-06-05 14:10 ` John Garry
2019-06-24 8:46 ` Ming Lei
2019-06-24 13:14 ` John Garry
2019-05-31 2:27 ` [PATCH 2/9] block: null_blk: introduce module parameter of 'g_host_tags' Ming Lei
2019-05-31 6:08 ` Hannes Reinecke
2019-05-31 15:39 ` Bart Van Assche
2019-06-24 8:43 ` Ming Lei
2019-06-02 1:56 ` Minwoo Im
2019-05-31 2:27 ` [PATCH 3/9] scsi: Add template flag 'host_tagset' Ming Lei
2019-05-31 6:08 ` Hannes Reinecke
2019-05-31 2:27 ` [PATCH 4/9] scsi_debug: support host tagset Ming Lei
2019-05-31 6:09 ` Hannes Reinecke
2019-06-02 2:03 ` Minwoo Im
2019-06-02 17:01 ` Douglas Gilbert
2019-05-31 2:27 ` Ming Lei [this message]
2019-05-31 6:10 ` [PATCH 5/9] scsi: introduce scsi_cmnd_hctx_index() Hannes Reinecke
2019-05-31 2:27 ` [PATCH 6/9] scsi: hpsa: convert private reply queue to blk-mq hw queue Ming Lei
2019-05-31 6:15 ` Hannes Reinecke
2019-05-31 6:30 ` Ming Lei
2019-05-31 6:40 ` Hannes Reinecke
2019-05-31 2:27 ` [PATCH 7/9] scsi: hisi_sas_v3: " Ming Lei
2019-05-31 6:20 ` Hannes Reinecke
2019-05-31 6:34 ` Ming Lei
2019-05-31 6:42 ` Hannes Reinecke
2019-05-31 7:14 ` Ming Lei
2019-05-31 11:38 ` John Garry
2019-06-03 11:00 ` Ming Lei
2019-06-03 13:00 ` John Garry
2019-06-04 13:37 ` Ming Lei
2019-05-31 2:28 ` [PATCH 8/9] scsi: megaraid: " Ming Lei
2019-05-31 6:22 ` Hannes Reinecke
2019-06-01 21:41 ` Kashyap Desai
2019-06-02 6:42 ` Ming Lei
2019-06-02 7:48 ` Ming Lei
2019-06-02 16:34 ` Kashyap Desai
2019-06-03 3:56 ` Ming Lei
2019-06-03 10:00 ` Kashyap Desai
2019-06-07 9:45 ` Kashyap Desai
2019-05-31 2:28 ` [PATCH 9/9] scsi: mp3sas: " Ming Lei
2019-05-31 6:23 ` Hannes Reinecke
2019-06-06 11:58 ` Sreekanth Reddy
2019-06-04 8:49 ` [PATCH 0/9] blk-mq/scsi: convert private reply queue into blk_mq " John Garry
2019-08-13 8:30 ` John Garry
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