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Merge tag 'dma-mapping-4.20-1' of git://git.infradead.org/users/hch/dma-mapping

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Pull more dma-mapping updates from Christoph Hellwig:

 - various swiotlb cleanups

 - do not dip into the ѕwiotlb pool for dma coherent allocations

 - add support for not cache coherent DMA to swiotlb

 - switch ARM64 to use the generic swiotlb_dma_ops

* tag 'dma-mapping-4.20-1' of git://git.infradead.org/users/hch/dma-mapping:
  arm64: use the generic swiotlb_dma_ops
  swiotlb: add support for non-coherent DMA
  swiotlb: don't dip into swiotlb pool for coherent allocations
  swiotlb: refactor swiotlb_map_page
  swiotlb: use swiotlb_map_page in swiotlb_map_sg_attrs
  swiotlb: merge swiotlb_unmap_page and unmap_single
  swiotlb: remove the overflow buffer
  swiotlb: do not panic on mapping failures
  swiotlb: mark is_swiotlb_buffer static
  swiotlb: remove a pointless comment
This commit is contained in:
Linus Torvalds
2018-10-26 11:29:17 -07:00
parent d1f2b1710d 886643b766
commit befa936331
9 changed files with 128 additions and 494 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/dma-direct.h
View File

@@ -5,6 +5,8 @@
#include <linux/dma-mapping.h>
#include <linux/mem_encrypt.h>
#define DIRECT_MAPPING_ERROR 0
#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
#include <asm/dma-direct.h>
#else

9
include/linux/swiotlb.h
View File

@@ -67,11 +67,6 @@ extern void swiotlb_tbl_sync_single(struct device *hwdev,
/* Accessory functions. */
void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
gfp_t flags, unsigned long attrs);
void swiotlb_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_addr, unsigned long attrs);
extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
@@ -106,9 +101,6 @@ extern void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, enum dma_data_direction dir);
extern int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
extern int
swiotlb_dma_supported(struct device *hwdev, u64 mask);
@@ -121,7 +113,6 @@ static inline unsigned int swiotlb_max_segment(void) { return 0; }
#endif
extern void swiotlb_print_info(void);
extern int is_swiotlb_buffer(phys_addr_t paddr);
extern void swiotlb_set_max_segment(unsigned int);
extern const struct dma_map_ops swiotlb_dma_ops;