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blk-mq-rdma: remove queue mapping helper for rdma devices

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No rdma device exposes its irq vectors affinity today. So the only
mapping that we have left, is the default blk_mq_map_queues, which
we fallback to anyways. Also fixup the only consumer of this helper
(nvme-rdma).

Remove this now dead code.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2023-03-22 14:37:03 +02:00 committed by Christoph Hellwig
parent 015ad2b1e4
commit edde9e70bb
5 changed files with 2 additions and 66 deletions
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5
block/Kconfig
View File

@ -215,11 +215,6 @@ config BLK_MQ_VIRTIO
depends on VIRTIO
default y
config BLK_MQ_RDMA
bool
depends on INFINIBAND
default y
config BLK_PM
def_bool PM

1
block/Makefile
View File

@ -30,7 +30,6 @@ obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o
obj-$(CONFIG_BLK_DEV_INTEGRITY_T10) += t10-pi.o
obj-$(CONFIG_BLK_MQ_PCI) += blk-mq-pci.o
obj-$(CONFIG_BLK_MQ_VIRTIO) += blk-mq-virtio.o
obj-$(CONFIG_BLK_MQ_RDMA) += blk-mq-rdma.o
obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o
obj-$(CONFIG_BLK_WBT) += blk-wbt.o
obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o

44
block/blk-mq-rdma.c
View File

@ -1,44 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2017 Sagi Grimberg.
*/
#include <linux/blk-mq.h>
#include <linux/blk-mq-rdma.h>
#include <rdma/ib_verbs.h>
/**
* 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.
* @first_vec: first interrupt vectors to use for queues (usually 0)
*
* This function assumes the rdma device @dev has at least as many available
* interrupt vetors as @set has queues. It will then query it's affinity mask
* and built queue mapping that maps a queue to the CPUs that have irq affinity
* for the corresponding vector.
*
* In case either the driver passed a @dev with less vectors than
* @set->nr_hw_queues, or @dev does not provide an affinity mask for a
* vector, we fallback to the naive mapping.
*/
void blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
struct ib_device *dev, int first_vec)
{
const struct cpumask *mask;
unsigned int queue, cpu;
for (queue = 0; queue < map->nr_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;
}
return;
fallback:
blk_mq_map_queues(map);
}
EXPORT_SYMBOL_GPL(blk_mq_rdma_map_queues);

7
drivers/nvme/host/rdma.c
View File

@ -12,7 +12,6 @@
#include <linux/string.h>
#include <linux/atomic.h>
#include <linux/blk-mq.h>
#include <linux/blk-mq-rdma.h>
#include <linux/blk-integrity.h>
#include <linux/types.h>
#include <linux/list.h>
@ -2159,10 +2158,8 @@ static void nvme_rdma_map_queues(struct blk_mq_tag_set *set)
ctrl->io_queues[HCTX_TYPE_DEFAULT];
set->map[HCTX_TYPE_READ].queue_offset = 0;
}
blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_DEFAULT],
ctrl->device->dev, 0);
blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_READ],
ctrl->device->dev, 0);
blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
blk_mq_map_queues(&set->map[HCTX_TYPE_READ]);
if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) {
/* map dedicated poll queues only if we have queues left */

11
include/linux/blk-mq-rdma.h
View File

@ -1,11 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BLK_MQ_RDMA_H
#define _LINUX_BLK_MQ_RDMA_H
struct blk_mq_tag_set;
struct ib_device;
void blk_mq_rdma_map_queues(struct blk_mq_queue_map *map,
struct ib_device *dev, int first_vec);
#endif /* _LINUX_BLK_MQ_RDMA_H */