Added blk-mq-rdma backport

Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.com>

diff --git a/patches/0003-BACKPORT-blk-mq-rdma.patch b/patches/0003-BACKPORT-blk-mq-rdma.patch
new file mode 100644 (file)
index 0000000..6559706
--- /dev/null
+++ b/patches/0003-BACKPORT-blk-mq-rdma.patch
@@ -0,0 +1,59 @@
+From: Vladimir Sokolovsky <vlad@mellanox.com>
+Subject: [PATCH] BACKPORT: blk-mq-rdma
+
+Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.com>
+---
+ block/blk-mq-rdma.c | 15 +++++++++------
+ 1 file changed, 9 insertions(+), 6 deletions(-)
+
+diff --git a/block/blk-mq-rdma.c b/block/blk-mq-rdma.c
+index xxxxxxx..xxxxxxx 100644
+--- a/block/blk-mq-rdma.c
++++ b/block/blk-mq-rdma.c
+@@ -1,3 +1,4 @@
++#if defined(HAVE_BLK_MQ_MAP_QUEUES)  && defined(HAVE_BLK_MQ_TAG_SET_HAS_MQ_MAP)
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+  * Copyright (c) 2017 Sagi Grimberg.
+@@ -8,8 +9,8 @@
+ 
+ /**
+  * blk_mq_rdma_map_queues - provide a default queue mapping for rdma device
+- * @map:      CPU to hardware queue map.
+- * @dev:      rdma device to provide a mapping for.
++ * @set:      tagset to provide the mapping for
++ * @dev:      rdma device associated with @set.
+  * @first_vec:        first interrupt vectors to use for queues (usually 0)
+  *
+  * This function assumes the rdma device @dev has at least as many available
+@@ -21,24 +22,26 @@
+  * @set->nr_hw_queues, or @dev does not provide an affinity mask for a
+  * vector, we fallback to the naive mapping.
+  */
+-int blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
++int blk_mq_rdma_map_queues(struct blk_mq_tag_set *set,
+               struct ib_device *dev, int first_vec)
+ {
+       const struct cpumask *mask;
+       unsigned int queue, cpu;
+ 
+-      for (queue = 0; queue < map->nr_queues; queue++) {
++      for (queue = 0; queue < set->nr_hw_queues; queue++) {
+               mask = ib_get_vector_affinity(dev, first_vec + queue);
+               if (!mask)
+                       goto fallback;
+ 
+               for_each_cpu(cpu, mask)
+-                      map->mq_map[cpu] = map->queue_offset + queue;
++                      set->mq_map[cpu] = queue;
+       }
+ 
+       return 0;
+ 
+ fallback:
+-      return blk_mq_map_queues(map);
++      return blk_mq_map_queues(set);
+ }
+ EXPORT_SYMBOL_GPL(blk_mq_rdma_map_queues);
++
++#endif /* HAVE_BLK_MQ_MAP_QUEUES */