bool use_dev_dma_pfn_offset;
};
-static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
-
static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev)
{
if (dev && dev->dma_mem)
return 1;
}
-void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
- dma_addr_t *dma_handle)
-{
- if (!dma_coherent_default_memory)
- return NULL;
-
- return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
- dma_handle);
-}
-
static int __dma_release_from_coherent(struct dma_coherent_mem *mem,
int order, void *vaddr)
{
return __dma_release_from_coherent(mem, order, vaddr);
}
-int dma_release_from_global_coherent(int order, void *vaddr)
-{
- if (!dma_coherent_default_memory)
- return 0;
-
- return __dma_release_from_coherent(dma_coherent_default_memory, order,
- vaddr);
-}
-
static int __dma_mmap_from_coherent(struct dma_coherent_mem *mem,
struct vm_area_struct *vma, void *vaddr, size_t size, int *ret)
{
return __dma_mmap_from_coherent(mem, vma, vaddr, size, ret);
}
+#ifdef CONFIG_DMA_GLOBAL_POOL
+static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
+
+void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
+ dma_addr_t *dma_handle)
+{
+ if (!dma_coherent_default_memory)
+ return NULL;
+
+ return __dma_alloc_from_coherent(dev, dma_coherent_default_memory, size,
+ dma_handle);
+}
+
+int dma_release_from_global_coherent(int order, void *vaddr)
+{
+ if (!dma_coherent_default_memory)
+ return 0;
+
+ return __dma_release_from_coherent(dma_coherent_default_memory, order,
+ vaddr);
+}
+
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *vaddr,
size_t size, int *ret)
{
pr_info("DMA: default coherent area is set\n");
return 0;
}
+#endif /* CONFIG_DMA_GLOBAL_POOL */
/*
* Support for reserved memory regions defined in device tree
#include <linux/of_fdt.h>
#include <linux/of_reserved_mem.h>
+#ifdef CONFIG_DMA_GLOBAL_POOL
static struct reserved_mem *dma_reserved_default_memory __initdata;
+#endif
static int rmem_dma_device_init(struct reserved_mem *rmem, struct device *dev)
{
return 0;
}
+#ifdef CONFIG_DMA_GLOBAL_POOL
static int __init dma_init_reserved_memory(void)
{
if (!dma_reserved_default_memory)
return dma_init_global_coherent(dma_reserved_default_memory->base,
dma_reserved_default_memory->size);
}
-
core_initcall(dma_init_reserved_memory);
+#endif /* CONFIG_DMA_GLOBAL_POOL */
RESERVEDMEM_OF_DECLARE(dma, "shared-dma-pool", rmem_dma_setup);
#endif