From: John Garry <john.garry@huawei.com>
To: <axboe@kernel.dk>, <jejb@linux.ibm.com>,
<martin.petersen@oracle.com>, <ming.lei@redhat.com>,
<bvanassche@acm.org>, <hare@suse.de>, <don.brace@microsemi.com>,
<sumit.saxena@broadcom.com>, <hch@infradead.org>,
<kashyap.desai@broadcom.com>,
<shivasharan.srikanteshwara@broadcom.com>
Cc: <chenxiang66@hisilicon.com>, <linux-block@vger.kernel.org>,
<linux-scsi@vger.kernel.org>, <esc.storagedev@microsemi.com>,
Hannes Reinecke <hare@suse.com>,
John Garry <john.garry@huawei.com>
Subject: [PATCH RFC v6 06/10] scsi: Add template flag 'host_tagset'
Date: Thu, 5 Mar 2020 19:54:36 +0800 [thread overview]
Message-ID: <1583409280-158604-7-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1583409280-158604-1-git-send-email-john.garry@huawei.com>
From: Hannes Reinecke <hare@suse.com>
Add a host template flag 'host_tagset' so hostwide tagset can be
shared on multiple reply queues after the SCSI device's reply queue
is converted to blk-mq hw queue.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/scsi_lib.c | 2 ++
include/scsi/scsi_host.h | 3 +++
2 files changed, 5 insertions(+)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 610ee41fa54c..84788ccc2672 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1901,6 +1901,8 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost)
shost->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
shost->tag_set.flags |=
BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy);
+ if (shost->hostt->host_tagset)
+ shost->tag_set.flags |= BLK_MQ_F_TAG_HCTX_SHARED;
shost->tag_set.driver_data = shost;
return blk_mq_alloc_tag_set(&shost->tag_set);
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index f577647bf5f2..4fd0af0883dd 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -429,6 +429,9 @@ struct scsi_host_template {
/* True if the low-level driver supports blk-mq only */
unsigned force_blk_mq:1;
+ /* True if the host uses host-wide tagspace */
+ unsigned host_tagset:1;
+
/*
* Countdown for host blocking with no commands outstanding.
*/
--
2.17.1
next prev parent reply other threads:[~2020-03-05 11:59 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 11:54 [PATCH RFC v6 00/10] blk-mq/scsi: Provide hostwide shared tags for SCSI HBAs John Garry
2020-03-05 11:54 ` [PATCH RFC v6 01/10] blk-mq: rename BLK_MQ_F_TAG_SHARED as BLK_MQ_F_TAG_QUEUE_SHARED John Garry
2020-03-05 11:54 ` [PATCH RFC v6 02/10] blk-mq: rename blk_mq_update_tag_set_depth() John Garry
2020-03-05 11:54 ` [PATCH RFC v6 03/10] blk-mq: Use pointers for blk_mq_tags bitmap tags John Garry
2020-03-05 12:42 ` Hannes Reinecke
2020-03-05 11:54 ` [PATCH RFC v6 04/10] blk-mq: Facilitate a shared sbitmap per tagset John Garry
2020-03-05 12:49 ` Hannes Reinecke
2020-03-05 13:52 ` John Garry
2020-03-05 11:54 ` [PATCH RFC v6 05/10] blk-mq: Add support in hctx_tags_bitmap_show() for a shared sbitmap John Garry
2020-03-05 12:52 ` Hannes Reinecke
2020-03-05 11:54 ` John Garry [this message]
2020-03-06 11:12 ` [PATCH RFC v6 06/10] scsi: Add template flag 'host_tagset' John Garry
2020-03-05 11:54 ` [PATCH RFC v6 07/10] scsi: hisi_sas: Switch v3 hw to MQ John Garry
2020-03-05 12:52 ` Hannes Reinecke
2020-03-05 11:54 ` [PATCH RFC v6 08/10] megaraid_sas: switch fusion adapters " John Garry
2020-04-07 11:14 ` Kashyap Desai
2020-04-08 9:33 ` John Garry
2020-04-08 9:59 ` Kashyap Desai
2020-04-17 16:46 ` John Garry
2020-04-20 17:47 ` Kashyap Desai
2020-04-21 12:35 ` John Garry
2020-04-22 18:59 ` Kashyap Desai
2020-04-22 21:28 ` John Garry
2020-04-23 16:31 ` John Garry
2020-04-24 16:31 ` Kashyap Desai
2020-04-27 17:06 ` John Garry
2020-04-27 18:58 ` Kashyap Desai
2020-04-28 15:55 ` John Garry
2020-04-29 11:29 ` John Garry
2020-04-29 15:50 ` Kashyap Desai
2020-04-29 17:55 ` John Garry
2020-04-30 17:40 ` John Garry
2020-04-30 19:18 ` Kashyap Desai
2020-03-05 11:54 ` [PATCH RFC v6 09/10] smartpqi: enable host tagset John Garry
2020-03-05 11:54 ` [PATCH RFC v6 10/10] hpsa: enable host_tagset and switch to MQ John Garry
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