#define _LINUX_DMA_DIRECT_H 1
#include <linux/dma-mapping.h>
-#include <linux/dma-noncoherent.h>
+#include <linux/dma-map-ops.h>
#include <linux/memblock.h> /* for min_low_pfn */
#include <linux/mem_encrypt.h>
#include <linux/swiotlb.h>
extern unsigned int zone_dma_bits;
-#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
-#include <asm/dma-direct.h>
-#else
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+/*
+ * Record the mapping of CPU physical to DMA addresses for a given region.
+ */
+struct bus_dma_region {
+ phys_addr_t cpu_start;
+ dma_addr_t dma_start;
+ u64 size;
+ u64 offset;
+};
+
+static inline dma_addr_t translate_phys_to_dma(struct device *dev,
+ phys_addr_t paddr)
{
- dma_addr_t dev_addr = (dma_addr_t)paddr;
+ const struct bus_dma_region *m;
+
+ for (m = dev->dma_range_map; m->size; m++)
+ if (paddr >= m->cpu_start && paddr - m->cpu_start < m->size)
+ return (dma_addr_t)paddr - m->offset;
- return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
+ /* make sure dma_capable fails when no translation is available */
+ return DMA_MAPPING_ERROR;
}
-static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
+static inline phys_addr_t translate_dma_to_phys(struct device *dev,
+ dma_addr_t dma_addr)
{
- phys_addr_t paddr = (phys_addr_t)dev_addr;
+ const struct bus_dma_region *m;
- return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
+ for (m = dev->dma_range_map; m->size; m++)
+ if (dma_addr >= m->dma_start && dma_addr - m->dma_start < m->size)
+ return (phys_addr_t)dma_addr + m->offset;
+
+ return (phys_addr_t)-1;
}
-#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
-#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
-bool force_dma_unencrypted(struct device *dev);
+#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
+#include <asm/dma-direct.h>
+#ifndef phys_to_dma_unencrypted
+#define phys_to_dma_unencrypted phys_to_dma
+#endif
#else
-static inline bool force_dma_unencrypted(struct device *dev)
+static inline dma_addr_t phys_to_dma_unencrypted(struct device *dev,
+ phys_addr_t paddr)
{
- return false;
+ if (dev->dma_range_map)
+ return translate_phys_to_dma(dev, paddr);
+ return paddr;
}
-#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
/*
* If memory encryption is supported, phys_to_dma will set the memory encryption
- * bit in the DMA address, and dma_to_phys will clear it. The raw __phys_to_dma
- * and __dma_to_phys versions should only be used on non-encrypted memory for
- * special occasions like DMA coherent buffers.
+ * bit in the DMA address, and dma_to_phys will clear it.
+ * phys_to_dma_unencrypted is for use on special unencrypted memory like swiotlb
+ * buffers.
*/
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
- return __sme_set(__phys_to_dma(dev, paddr));
+ return __sme_set(phys_to_dma_unencrypted(dev, paddr));
}
-static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
{
- return __sme_clr(__dma_to_phys(dev, daddr));
+ phys_addr_t paddr;
+
+ if (dev->dma_range_map)
+ paddr = translate_dma_to_phys(dev, dma_addr);
+ else
+ paddr = dma_addr;
+
+ return __sme_clr(paddr);
+}
+#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
+
+#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
+bool force_dma_unencrypted(struct device *dev);
+#else
+static inline bool force_dma_unencrypted(struct device *dev)
+{
+ return false;
}
+#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
bool is_ram)
{
dma_addr_t end = addr + size - 1;
- if (!dev->dma_mask)
+ if (addr == DMA_MAPPING_ERROR)
return false;
-
if (is_ram && !IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
return false;
gfp_t gfp, unsigned long attrs);
void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_addr, unsigned long attrs);
-void *dma_direct_alloc_pages(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs);
-void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t dma_addr, unsigned long attrs);
-int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs);
-bool dma_direct_can_mmap(struct device *dev);
-int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs);
+struct page *dma_direct_alloc_pages(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp);
+void dma_direct_free_pages(struct device *dev, size_t size,
+ struct page *page, dma_addr_t dma_addr,
+ enum dma_data_direction dir);
int dma_direct_supported(struct device *dev, u64 mask);
-bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr);
-int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
- enum dma_data_direction dir, unsigned long attrs);
dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
size_t size, enum dma_data_direction dir, unsigned long attrs);
-size_t dma_direct_max_mapping_size(struct device *dev);
-#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
- defined(CONFIG_SWIOTLB)
-void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir);
-#else
-static inline void dma_direct_sync_sg_for_device(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir)
-{
-}
-#endif
-
-#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
- defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
- defined(CONFIG_SWIOTLB)
-void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir, unsigned long attrs);
-void dma_direct_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir);
-#else
-static inline void dma_direct_unmap_sg(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
-}
-static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir)
-{
-}
-#endif
-
-static inline void dma_direct_sync_single_for_device(struct device *dev,
- dma_addr_t addr, size_t size, enum dma_data_direction dir)
-{
- phys_addr_t paddr = dma_to_phys(dev, addr);
-
- if (unlikely(is_swiotlb_buffer(paddr)))
- swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE);
-
- if (!dev_is_dma_coherent(dev))
- arch_sync_dma_for_device(paddr, size, dir);
-}
-
-static inline void dma_direct_sync_single_for_cpu(struct device *dev,
- dma_addr_t addr, size_t size, enum dma_data_direction dir)
-{
- phys_addr_t paddr = dma_to_phys(dev, addr);
-
- if (!dev_is_dma_coherent(dev)) {
- arch_sync_dma_for_cpu(paddr, size, dir);
- arch_sync_dma_for_cpu_all();
- }
-
- if (unlikely(is_swiotlb_buffer(paddr)))
- swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU);
-}
-
-static inline dma_addr_t dma_direct_map_page(struct device *dev,
- struct page *page, unsigned long offset, size_t size,
- enum dma_data_direction dir, unsigned long attrs)
-{
- phys_addr_t phys = page_to_phys(page) + offset;
- dma_addr_t dma_addr = phys_to_dma(dev, phys);
-
- if (unlikely(swiotlb_force == SWIOTLB_FORCE))
- return swiotlb_map(dev, phys, size, dir, attrs);
-
- if (unlikely(!dma_capable(dev, dma_addr, size, true))) {
- if (swiotlb_force != SWIOTLB_NO_FORCE)
- return swiotlb_map(dev, phys, size, dir, attrs);
-
- dev_WARN_ONCE(dev, 1,
- "DMA addr %pad+%zu overflow (mask %llx, bus limit %llx).\n",
- &dma_addr, size, *dev->dma_mask, dev->bus_dma_limit);
- return DMA_MAPPING_ERROR;
- }
-
- if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- arch_sync_dma_for_device(phys, size, dir);
- return dma_addr;
-}
-
-static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
- size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
- phys_addr_t phys = dma_to_phys(dev, addr);
-
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_direct_sync_single_for_cpu(dev, addr, size, dir);
-
- if (unlikely(is_swiotlb_buffer(phys)))
- swiotlb_tbl_unmap_single(dev, phys, size, size, dir, attrs);
-}
#endif /* _LINUX_DMA_DIRECT_H */
projects / linux-2.6-microblaze.git / blobdiff