#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>
+#include <asm-generic/dma-coherent.h>
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
size_t size,
debug_dma_unmap_page(dev, addr, size, dir, true);
}
+/*
+ * dma_maps_sg_attrs returns 0 on error and > 0 on success.
+ * It should never return a value < 0.
+ */
static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
kmemcheck_mark_initialized(sg_virt(s), s->length);
BUG_ON(!valid_dma_direction(dir));
ents = ops->map_sg(dev, sg, nents, dir, attrs);
+ BUG_ON(ents < 0);
debug_dma_map_sg(dev, sg, nents, ents, dir);
return ents;
extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
+void *dma_common_contiguous_remap(struct page *page, size_t size,
+ unsigned long vm_flags,
+ pgprot_t prot, const void *caller);
+
+void *dma_common_pages_remap(struct page **pages, size_t size,
+ unsigned long vm_flags, pgprot_t prot,
+ const void *caller);
+void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags);
+
/**
* dma_mmap_attrs - map a coherent DMA allocation into user space
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
-static inline int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size)
-{
- DEFINE_DMA_ATTRS(attrs);
- dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
- return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs);
-}
-
int
dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
+#ifndef arch_dma_alloc_attrs
+#define arch_dma_alloc_attrs(dev, flag) (true)
+#endif
+
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ void *cpu_addr;
+
+ BUG_ON(!ops);
+
+ if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
+ return cpu_addr;
+
+ if (!arch_dma_alloc_attrs(&dev, &flag))
+ return NULL;
+ if (!ops->alloc)
+ return NULL;
+
+ cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
+ debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
+ return cpu_addr;
+}
+
+static inline void dma_free_attrs(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!ops);
+ WARN_ON(irqs_disabled());
+
+ if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
+ return;
+
+ if (!ops->free)
+ return;
+
+ debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+ ops->free(dev, size, cpu_addr, dma_handle, attrs);
+}
+
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag)
+{
+ return dma_alloc_attrs(dev, size, dma_handle, flag, NULL);
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle)
+{
+ return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
+}
+
+static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ DEFINE_DMA_ATTRS(attrs);
+
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+ return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
+}
+
+static inline void dma_free_noncoherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle)
+{
+ DEFINE_DMA_ATTRS(attrs);
+
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+ dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
+}
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ debug_dma_mapping_error(dev, dma_addr);
+
+ if (get_dma_ops(dev)->mapping_error)
+ return get_dma_ops(dev)->mapping_error(dev, dma_addr);
+
+#ifdef DMA_ERROR_CODE
+ return dma_addr == DMA_ERROR_CODE;
+#else
+ return 0;
+#endif
+}
+
+#ifndef HAVE_ARCH_DMA_SUPPORTED
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ if (!ops)
+ return 0;
+ if (!ops->dma_supported)
+ return 1;
+ return ops->dma_supported(dev, mask);
+}
+#endif
+
+#ifndef HAVE_ARCH_DMA_SET_MASK
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ if (ops->set_dma_mask)
+ return ops->set_dma_mask(dev, mask);
+
+ if (!dev->dma_mask || !dma_supported(dev, mask))
+ return -EIO;
+ *dev->dma_mask = mask;
+ return 0;
+}
+#endif
+
#endif
projects / firefly-linux-kernel-4.4.55.git / blobdiff