LinuxKPI: add dmam_pool_create() support
dmam_pool_create() is a "managed" version of dma_pool_create() which will cleanup everything left when the device goes away using the devres framework. For that add an internal cleanup function to be called from devres release. This is used by at least one wireless driver. Sponsored by: The FreeBSD Foundation MFC after: 10 days Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D30520
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@ -41,6 +41,7 @@ struct dma_pool;
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struct dma_pool *linux_dma_pool_create(char *name, struct device *dev,
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size_t size, size_t align, size_t boundary);
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void linux_dma_pool_destroy(struct dma_pool *pool);
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void lkpi_dmam_pool_destroy(struct device *, void *);
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void *linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle);
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void linux_dma_pool_free(struct dma_pool *pool, void *vaddr,
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@ -54,6 +55,25 @@ dma_pool_create(char *name, struct device *dev, size_t size,
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return (linux_dma_pool_create(name, dev, size, align, boundary));
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}
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static inline struct dma_pool *
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dmam_pool_create(/* const */ char *name, struct device *dev, size_t size,
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size_t align, size_t boundary)
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{
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struct dma_pool **pp;
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pp = devres_alloc(lkpi_dmam_pool_destroy, sizeof(*pp), GFP_KERNEL);
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if (pp == NULL)
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return (NULL);
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*pp = linux_dma_pool_create(name, dev, size, align, boundary);
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if (*pp == NULL) {
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devres_free(pp);
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return (NULL);
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}
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devres_add(dev, pp);
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return (*pp);
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}
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static inline void
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dma_pool_destroy(struct dma_pool *pool)
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{
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@ -997,6 +997,16 @@ linux_dma_pool_destroy(struct dma_pool *pool)
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kfree(pool);
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}
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void
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lkpi_dmam_pool_destroy(struct device *dev, void *p)
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{
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struct dma_pool *pool;
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pool = *(struct dma_pool **)p;
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LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree);
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linux_dma_pool_destroy(pool);
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}
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void *
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linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle)
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