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authorJens Axboe <axboe@kernel.dk>2018-10-29 13:06:14 -0600
committerJens Axboe <axboe@kernel.dk>2018-11-07 13:44:59 -0700
commited76e329d74a4b15ac0f5fd3adbd52ec0178a134 (patch)
tree628ce9d3ac0997faef04f2d9e4f4d169594fe366 /block
parenta8908939af569ce2419f43fd56eeaf003bc3d85d (diff)
downloadlinux-ed76e329d74a4b15ac0f5fd3adbd52ec0178a134.tar.bz2
blk-mq: abstract out queue map
This is in preparation for allowing multiple sets of maps per queue, if so desired. Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq-cpumap.c10
-rw-r--r--block/blk-mq-pci.c10
-rw-r--r--block/blk-mq-rdma.c4
-rw-r--r--block/blk-mq-virtio.c8
-rw-r--r--block/blk-mq.c34
-rw-r--r--block/blk-mq.h8
6 files changed, 38 insertions, 36 deletions
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index 3eb169f15842..6e6686c55984 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -30,10 +30,10 @@ static int get_first_sibling(unsigned int cpu)
return cpu;
}
-int blk_mq_map_queues(struct blk_mq_tag_set *set)
+int blk_mq_map_queues(struct blk_mq_queue_map *qmap)
{
- unsigned int *map = set->mq_map;
- unsigned int nr_queues = set->nr_hw_queues;
+ unsigned int *map = qmap->mq_map;
+ unsigned int nr_queues = qmap->nr_queues;
unsigned int cpu, first_sibling;
for_each_possible_cpu(cpu) {
@@ -62,12 +62,12 @@ EXPORT_SYMBOL_GPL(blk_mq_map_queues);
* We have no quick way of doing reverse lookups. This is only used at
* queue init time, so runtime isn't important.
*/
-int blk_mq_hw_queue_to_node(unsigned int *mq_map, unsigned int index)
+int blk_mq_hw_queue_to_node(struct blk_mq_queue_map *qmap, unsigned int index)
{
int i;
for_each_possible_cpu(i) {
- if (index == mq_map[i])
+ if (index == qmap->mq_map[i])
return local_memory_node(cpu_to_node(i));
}
diff --git a/block/blk-mq-pci.c b/block/blk-mq-pci.c
index db644ec624f5..40333d60a850 100644
--- a/block/blk-mq-pci.c
+++ b/block/blk-mq-pci.c
@@ -31,26 +31,26 @@
* that maps a queue to the CPUs that have irq affinity for the corresponding
* vector.
*/
-int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev,
+int blk_mq_pci_map_queues(struct blk_mq_queue_map *qmap, struct pci_dev *pdev,
int offset)
{
const struct cpumask *mask;
unsigned int queue, cpu;
- for (queue = 0; queue < set->nr_hw_queues; queue++) {
+ for (queue = 0; queue < qmap->nr_queues; queue++) {
mask = pci_irq_get_affinity(pdev, queue + offset);
if (!mask)
goto fallback;
for_each_cpu(cpu, mask)
- set->mq_map[cpu] = queue;
+ qmap->mq_map[cpu] = queue;
}
return 0;
fallback:
- WARN_ON_ONCE(set->nr_hw_queues > 1);
- blk_mq_clear_mq_map(set);
+ WARN_ON_ONCE(qmap->nr_queues > 1);
+ blk_mq_clear_mq_map(qmap);
return 0;
}
EXPORT_SYMBOL_GPL(blk_mq_pci_map_queues);
diff --git a/block/blk-mq-rdma.c b/block/blk-mq-rdma.c
index 996167f1de18..a71576aff3a5 100644
--- a/block/blk-mq-rdma.c
+++ b/block/blk-mq-rdma.c
@@ -41,12 +41,12 @@ int blk_mq_rdma_map_queues(struct blk_mq_tag_set *set,
goto fallback;
for_each_cpu(cpu, mask)
- set->mq_map[cpu] = queue;
+ set->map[0].mq_map[cpu] = queue;
}
return 0;
fallback:
- return blk_mq_map_queues(set);
+ return blk_mq_map_queues(&set->map[0]);
}
EXPORT_SYMBOL_GPL(blk_mq_rdma_map_queues);
diff --git a/block/blk-mq-virtio.c b/block/blk-mq-virtio.c
index c3afbca11299..661fbfef480f 100644
--- a/block/blk-mq-virtio.c
+++ b/block/blk-mq-virtio.c
@@ -29,7 +29,7 @@
* that maps a queue to the CPUs that have irq affinity for the corresponding
* vector.
*/
-int blk_mq_virtio_map_queues(struct blk_mq_tag_set *set,
+int blk_mq_virtio_map_queues(struct blk_mq_queue_map *qmap,
struct virtio_device *vdev, int first_vec)
{
const struct cpumask *mask;
@@ -38,17 +38,17 @@ int blk_mq_virtio_map_queues(struct blk_mq_tag_set *set,
if (!vdev->config->get_vq_affinity)
goto fallback;
- for (queue = 0; queue < set->nr_hw_queues; queue++) {
+ for (queue = 0; queue < qmap->nr_queues; queue++) {
mask = vdev->config->get_vq_affinity(vdev, first_vec + queue);
if (!mask)
goto fallback;
for_each_cpu(cpu, mask)
- set->mq_map[cpu] = queue;
+ qmap->mq_map[cpu] = queue;
}
return 0;
fallback:
- return blk_mq_map_queues(set);
+ return blk_mq_map_queues(qmap);
}
EXPORT_SYMBOL_GPL(blk_mq_virtio_map_queues);
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 766facfa1f08..fac88d16988b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1975,7 +1975,7 @@ struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set,
struct blk_mq_tags *tags;
int node;
- node = blk_mq_hw_queue_to_node(set->mq_map, hctx_idx);
+ node = blk_mq_hw_queue_to_node(&set->map[0], hctx_idx);
if (node == NUMA_NO_NODE)
node = set->numa_node;
@@ -2031,7 +2031,7 @@ int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
size_t rq_size, left;
int node;
- node = blk_mq_hw_queue_to_node(set->mq_map, hctx_idx);
+ node = blk_mq_hw_queue_to_node(&set->map[0], hctx_idx);
if (node == NUMA_NO_NODE)
node = set->numa_node;
@@ -2322,7 +2322,7 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* If the cpu isn't present, the cpu is mapped to first hctx.
*/
for_each_possible_cpu(i) {
- hctx_idx = set->mq_map[i];
+ hctx_idx = set->map[0].mq_map[i];
/* unmapped hw queue can be remapped after CPU topo changed */
if (!set->tags[hctx_idx] &&
!__blk_mq_alloc_rq_map(set, hctx_idx)) {
@@ -2332,7 +2332,7 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* case, remap the current ctx to hctx[0] which
* is guaranteed to always have tags allocated
*/
- set->mq_map[i] = 0;
+ set->map[0].mq_map[i] = 0;
}
ctx = per_cpu_ptr(q->queue_ctx, i);
@@ -2585,7 +2585,7 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
int node;
struct blk_mq_hw_ctx *hctx;
- node = blk_mq_hw_queue_to_node(set->mq_map, i);
+ node = blk_mq_hw_queue_to_node(&set->map[0], i);
/*
* If the hw queue has been mapped to another numa node,
* we need to realloc the hctx. If allocation fails, fallback
@@ -2791,18 +2791,18 @@ static int blk_mq_update_queue_map(struct blk_mq_tag_set *set)
* for (queue = 0; queue < set->nr_hw_queues; queue++) {
* mask = get_cpu_mask(queue)
* for_each_cpu(cpu, mask)
- * set->mq_map[cpu] = queue;
+ * set->map.mq_map[cpu] = queue;
* }
*
* When we need to remap, the table has to be cleared for
* killing stale mapping since one CPU may not be mapped
* to any hw queue.
*/
- blk_mq_clear_mq_map(set);
+ blk_mq_clear_mq_map(&set->map[0]);
return set->ops->map_queues(set);
} else
- return blk_mq_map_queues(set);
+ return blk_mq_map_queues(&set->map[0]);
}
/*
@@ -2857,10 +2857,12 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
return -ENOMEM;
ret = -ENOMEM;
- set->mq_map = kcalloc_node(nr_cpu_ids, sizeof(*set->mq_map),
- GFP_KERNEL, set->numa_node);
- if (!set->mq_map)
+ set->map[0].mq_map = kcalloc_node(nr_cpu_ids,
+ sizeof(*set->map[0].mq_map),
+ GFP_KERNEL, set->numa_node);
+ if (!set->map[0].mq_map)
goto out_free_tags;
+ set->map[0].nr_queues = set->nr_hw_queues;
ret = blk_mq_update_queue_map(set);
if (ret)
@@ -2876,8 +2878,8 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
return 0;
out_free_mq_map:
- kfree(set->mq_map);
- set->mq_map = NULL;
+ kfree(set->map[0].mq_map);
+ set->map[0].mq_map = NULL;
out_free_tags:
kfree(set->tags);
set->tags = NULL;
@@ -2892,8 +2894,8 @@ void blk_mq_free_tag_set(struct blk_mq_tag_set *set)
for (i = 0; i < nr_cpu_ids; i++)
blk_mq_free_map_and_requests(set, i);
- kfree(set->mq_map);
- set->mq_map = NULL;
+ kfree(set->map[0].mq_map);
+ set->map[0].mq_map = NULL;
kfree(set->tags);
set->tags = NULL;
@@ -3054,7 +3056,7 @@ fallback:
pr_warn("Increasing nr_hw_queues to %d fails, fallback to %d\n",
nr_hw_queues, prev_nr_hw_queues);
set->nr_hw_queues = prev_nr_hw_queues;
- blk_mq_map_queues(set);
+ blk_mq_map_queues(&set->map[0]);
goto fallback;
}
blk_mq_map_swqueue(q);
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 9536be06d022..889f0069dd80 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -70,14 +70,14 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
/*
* CPU -> queue mappings
*/
-extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int);
+extern int blk_mq_hw_queue_to_node(struct blk_mq_queue_map *qmap, unsigned int);
static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
int cpu)
{
struct blk_mq_tag_set *set = q->tag_set;
- return q->queue_hw_ctx[set->mq_map[cpu]];
+ return q->queue_hw_ctx[set->map[0].mq_map[cpu]];
}
/*
@@ -206,12 +206,12 @@ static inline void blk_mq_put_driver_tag(struct request *rq)
__blk_mq_put_driver_tag(hctx, rq);
}
-static inline void blk_mq_clear_mq_map(struct blk_mq_tag_set *set)
+static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap)
{
int cpu;
for_each_possible_cpu(cpu)
- set->mq_map[cpu] = 0;
+ qmap->mq_map[cpu] = 0;
}
#endif