mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 12:44:11 +08:00
90110e04f2
block/blk-mq.h needs various definitions from <linux/blk-mq.h>, include it there instead of relying on the source files to include both. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Link: https://lore.kernel.org/r/20230413064057.707578-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* CPU <-> hardware queue mapping helpers
|
|
*
|
|
* Copyright (C) 2013-2014 Jens Axboe
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/group_cpus.h>
|
|
|
|
#include "blk.h"
|
|
#include "blk-mq.h"
|
|
|
|
void blk_mq_map_queues(struct blk_mq_queue_map *qmap)
|
|
{
|
|
const struct cpumask *masks;
|
|
unsigned int queue, cpu;
|
|
|
|
masks = group_cpus_evenly(qmap->nr_queues);
|
|
if (!masks) {
|
|
for_each_possible_cpu(cpu)
|
|
qmap->mq_map[cpu] = qmap->queue_offset;
|
|
return;
|
|
}
|
|
|
|
for (queue = 0; queue < qmap->nr_queues; queue++) {
|
|
for_each_cpu(cpu, &masks[queue])
|
|
qmap->mq_map[cpu] = qmap->queue_offset + queue;
|
|
}
|
|
kfree(masks);
|
|
}
|
|
EXPORT_SYMBOL_GPL(blk_mq_map_queues);
|
|
|
|
/**
|
|
* blk_mq_hw_queue_to_node - Look up the memory node for a hardware queue index
|
|
* @qmap: CPU to hardware queue map.
|
|
* @index: hardware queue index.
|
|
*
|
|
* 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(struct blk_mq_queue_map *qmap, unsigned int index)
|
|
{
|
|
int i;
|
|
|
|
for_each_possible_cpu(i) {
|
|
if (index == qmap->mq_map[i])
|
|
return cpu_to_node(i);
|
|
}
|
|
|
|
return NUMA_NO_NODE;
|
|
}
|