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Merge tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping

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Pull dma-mapping updates from Christoph Hellwig:

 - move the USB special case that bounced DMA through a device bar into
   the USB code instead of handling it in the common DMA code (Laurentiu
   Tudor and Fredrik Noring)

 - don't dip into the global CMA pool for single page allocations
   (Nicolin Chen)

 - fix a crash when allocating memory for the atomic pool failed during
   boot (Florian Fainelli)

 - move support for MIPS-style uncached segments to the common code and
   use that for MIPS and nios2 (me)

 - make support for DMA_ATTR_NON_CONSISTENT and
   DMA_ATTR_NO_KERNEL_MAPPING generic (me)

 - convert nds32 to the generic remapping allocator (me)

* tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping: (29 commits)
  dma-mapping: mark dma_alloc_need_uncached as __always_inline
  MIPS: only select ARCH_HAS_UNCACHED_SEGMENT for non-coherent platforms
  usb: host: Fix excessive alignment restriction for local memory allocations
  lib/genalloc.c: Add algorithm, align and zeroed family of DMA allocators
  nios2: use the generic uncached segment support in dma-direct
  nds32: use the generic remapping allocator for coherent DMA allocations
  arc: use the generic remapping allocator for coherent DMA allocations
  dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code
  dma-direct: handle DMA_ATTR_NON_CONSISTENT in common code
  dma-mapping: add a dma_alloc_need_uncached helper
  openrisc: remove the partial DMA_ATTR_NON_CONSISTENT support
  arc: remove the partial DMA_ATTR_NON_CONSISTENT support
  arm-nommu: remove the partial DMA_ATTR_NON_CONSISTENT support
  ARM: dma-mapping: allow larger DMA mask than supported
  dma-mapping: truncate dma masks to what dma_addr_t can hold
  iommu/dma: Apply dma_{alloc,free}_contiguous functions
  dma-remap: Avoid de-referencing NULL atomic_pool
  MIPS: use the generic uncached segment support in dma-direct
  dma-direct: provide generic support for uncached kernel segments
  au1100fb: fix DMA API abuse
  ...
This commit is contained in:
Linus Torvalds
2019-07-12 15:13:55 -07:00
parent 9787aed57d 15ffe5e1ac
commit 9e3a25dc99
41 changed files with 519 additions and 658 deletions
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24
arch/arm/mm/dma-mapping-nommu.c
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@@ -35,18 +35,7 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size,
unsigned long attrs)
{
void *ret;
/*
* Try generic allocator first if we are advertised that
* consistency is not required.
*/
if (attrs & DMA_ATTR_NON_CONSISTENT)
return dma_direct_alloc_pages(dev, size, dma_handle, gfp,
attrs);
ret = dma_alloc_from_global_coherent(size, dma_handle);
void *ret = dma_alloc_from_global_coherent(size, dma_handle);
/*
* dma_alloc_from_global_coherent() may fail because:
@@ -66,16 +55,9 @@ static void arm_nommu_dma_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr,
unsigned long attrs)
{
if (attrs & DMA_ATTR_NON_CONSISTENT) {
dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
} else {
int ret = dma_release_from_global_coherent(get_order(size),
cpu_addr);
int ret = dma_release_from_global_coherent(get_order(size), cpu_addr);
WARN_ON_ONCE(ret == 0);
}
return;
WARN_ON_ONCE(ret == 0);
}
static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,