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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-25 17:17:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-25 17:17:18 -0700
commitcef55b518c7b83020fc8bcc496402242cc921f29 (patch)
tree19a7b10bbeb1fc5086efa058dc091030a70a2495 /include/linux
parent25f6a53799d667283d3bee29a6ac75ae3dae38dc (diff)
parent878ec36765fa71ffe656bc003d25bb9f8bad28f9 (diff)
Merge tag 'dma-mapping-4.13-2' of git://git.infradead.org/users/hch/dma-mapping
Pull dma mapping fixes from Christoph Hellwig: "split the global dma coherent pool from the per-device pool. This fixes a regression in the earlier 4.13 pull requests where the global pool would override a per-device CMA pool (Vladimir Murzin)" * tag 'dma-mapping-4.13-2' of git://git.infradead.org/users/hch/dma-mapping: ARM: NOMMU: Wire-up default DMA interface dma-coherent: introduce interface for default DMA pool
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/dma-mapping.h40
1 files changed, 32 insertions, 8 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 843ab866e0f4..03c0196a6f24 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -157,16 +157,40 @@ static inline int is_device_dma_capable(struct device *dev)
* These three functions are only for dma allocator.
* Don't use them in device drivers.
*/
-int dma_alloc_from_coherent(struct device *dev, ssize_t size,
+int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
dma_addr_t *dma_handle, void **ret);
-int dma_release_from_coherent(struct device *dev, int order, void *vaddr);
+int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
-int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
+int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, size_t size, int *ret);
+
+void *dma_alloc_from_global_coherent(ssize_t size, dma_addr_t *dma_handle);
+int dma_release_from_global_coherent(int order, void *vaddr);
+int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
+ size_t size, int *ret);
+
#else
-#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
-#define dma_release_from_coherent(dev, order, vaddr) (0)
-#define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0)
+#define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
+#define dma_release_from_dev_coherent(dev, order, vaddr) (0)
+#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
+
+static inline void *dma_alloc_from_global_coherent(ssize_t size,
+ dma_addr_t *dma_handle)
+{
+ return NULL;
+}
+
+static inline int dma_release_from_global_coherent(int order, void *vaddr)
+{
+ return 0;
+}
+
+static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
+ void *cpu_addr, size_t size,
+ int *ret)
+{
+ return 0;
+}
#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
#ifdef CONFIG_HAS_DMA
@@ -481,7 +505,7 @@ static inline void *dma_alloc_attrs(struct device *dev, size_t size,
BUG_ON(!ops);
- if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
+ if (dma_alloc_from_dev_coherent(dev, size, dma_handle, &cpu_addr))
return cpu_addr;
if (!arch_dma_alloc_attrs(&dev, &flag))
@@ -503,7 +527,7 @@ static inline void dma_free_attrs(struct device *dev, size_t size,
BUG_ON(!ops);
WARN_ON(irqs_disabled());
- if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
+ if (dma_release_from_dev_coherent(dev, get_order(size), cpu_addr))
return;
if (!ops->free || !cpu_addr)