From c454176da289dba03283c1f8e66944903765215f Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 24 Oct 2018 13:16:11 -0600 Subject: [PATCH] blk-mq: initial support for multiple queue maps to #28991349 commit 843477d4cc5c4bb4e346c561ecd3b9d0bd67e8c8 upstream Add a queue offset to the tag map. This enables users to map iteratively, for each queue map type they support. Bump maximum number of supported maps to 2, we're now fully able to support more than 1 map. Reviewed-by: Hannes Reinecke Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Signed-off-by: Jens Axboe Signed-off-by: Xiaoguang Wang Reviewed-by: Joseph Qi --- block/blk-mq-cpumap.c | 9 +++++---- block/blk-mq-pci.c | 2 +- block/blk-mq-virtio.c | 2 +- include/linux/blk-mq.h | 3 ++- 4 files changed, 9 insertions(+), 7 deletions(-) diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c index 6e6686c55984..03a534820271 100644 --- a/block/blk-mq-cpumap.c +++ b/block/blk-mq-cpumap.c @@ -14,9 +14,10 @@ #include "blk.h" #include "blk-mq.h" -static int cpu_to_queue_index(unsigned int nr_queues, const int cpu) +static int cpu_to_queue_index(struct blk_mq_queue_map *qmap, + unsigned int nr_queues, const int cpu) { - return cpu % nr_queues; + return qmap->queue_offset + (cpu % nr_queues); } static int get_first_sibling(unsigned int cpu) @@ -44,11 +45,11 @@ int blk_mq_map_queues(struct blk_mq_queue_map *qmap) * performace optimizations. */ if (cpu < nr_queues) { - map[cpu] = cpu_to_queue_index(nr_queues, cpu); + map[cpu] = cpu_to_queue_index(qmap, nr_queues, cpu); } else { first_sibling = get_first_sibling(cpu); if (first_sibling == cpu) - map[cpu] = cpu_to_queue_index(nr_queues, cpu); + map[cpu] = cpu_to_queue_index(qmap, nr_queues, cpu); else map[cpu] = map[first_sibling]; } diff --git a/block/blk-mq-pci.c b/block/blk-mq-pci.c index 40333d60a850..1dce18553984 100644 --- a/block/blk-mq-pci.c +++ b/block/blk-mq-pci.c @@ -43,7 +43,7 @@ int blk_mq_pci_map_queues(struct blk_mq_queue_map *qmap, struct pci_dev *pdev, goto fallback; for_each_cpu(cpu, mask) - qmap->mq_map[cpu] = queue; + qmap->mq_map[cpu] = qmap->queue_offset + queue; } return 0; diff --git a/block/blk-mq-virtio.c b/block/blk-mq-virtio.c index 661fbfef480f..370827163835 100644 --- a/block/blk-mq-virtio.c +++ b/block/blk-mq-virtio.c @@ -44,7 +44,7 @@ int blk_mq_virtio_map_queues(struct blk_mq_queue_map *qmap, goto fallback; for_each_cpu(cpu, mask) - qmap->mq_map[cpu] = queue; + qmap->mq_map[cpu] = qmap->queue_offset + queue; } return 0; diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 385f64709063..20aacc404458 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -83,10 +83,11 @@ struct blk_mq_hw_ctx { struct blk_mq_queue_map { unsigned int *mq_map; unsigned int nr_queues; + unsigned int queue_offset; }; enum { - HCTX_MAX_TYPES = 1, + HCTX_MAX_TYPES = 2, }; struct blk_mq_tag_set { -- GitLab