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dmapool: add NUMA affinity support

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Introduce dma_pool_create_node(), like dma_pool_create() but taking an
additional NUMA node argument. Allocate struct dma_pool on the desired
node, and store the node on dma_pool for allocating struct dma_page.
Make dma_pool_create() an alias for dma_pool_create_node() with node set
to NUMA_NO_NODE.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Keith Busch
2025-04-25 20:06:34 -06:00
committed by Christoph Hellwig
parent 0164d1350a
commit 1c9a93bf1d
2 changed files with 25 additions and 11 deletions
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21
include/linux/dmapool.h
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@@ -11,6 +11,7 @@
#ifndef LINUX_DMAPOOL_H
#define LINUX_DMAPOOL_H
#include <linux/nodemask_types.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
@@ -18,8 +19,8 @@ struct device;
#ifdef CONFIG_HAS_DMA
struct dma_pool *dma_pool_create(const char *name, struct device *dev,
size_t size, size_t align, size_t allocation);
struct dma_pool *dma_pool_create_node(const char *name, struct device *dev,
size_t size, size_t align, size_t boundary, int node);
void dma_pool_destroy(struct dma_pool *pool);
@@ -35,9 +36,12 @@ struct dma_pool *dmam_pool_create(const char *name, struct device *dev,
void dmam_pool_destroy(struct dma_pool *pool);
#else /* !CONFIG_HAS_DMA */
static inline struct dma_pool *dma_pool_create(const char *name,
struct device *dev, size_t size, size_t align, size_t allocation)
{ return NULL; }
static inline struct dma_pool *dma_pool_create_node(const char *name,
struct device *dev, size_t size, size_t align, size_t boundary,
int node)
{
return NULL;
}
static inline void dma_pool_destroy(struct dma_pool *pool) { }
static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle) { return NULL; }
@@ -49,6 +53,13 @@ static inline struct dma_pool *dmam_pool_create(const char *name,
static inline void dmam_pool_destroy(struct dma_pool *pool) { }
#endif /* !CONFIG_HAS_DMA */
static inline struct dma_pool *dma_pool_create(const char *name,
struct device *dev, size_t size, size_t align, size_t boundary)
{
return dma_pool_create_node(name, dev, size, align, boundary,
NUMA_NO_NODE);
}
static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle)
{