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This is the first pull request for the new dma-mapping subsystem

Browse source 
In this new subsystem we'll try to properly maintain all the generic
 code related to dma-mapping, and will further consolidate arch code
 into common helpers.
 
 This pull request contains:
 
  - removal of the DMA_ERROR_CODE macro, replacing it with calls
    to ->mapping_error so that the dma_map_ops instances are
    more self contained and can be shared across architectures (me)
  - removal of the ->set_dma_mask method, which duplicates the
    ->dma_capable one in terms of functionality, but requires more
    duplicate code.
  - various updates for the coherent dma pool and related arm code
    (Vladimir)
  - various smaller cleanups (me)
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Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping infrastructure from Christoph Hellwig:
 "This is the first pull request for the new dma-mapping subsystem

  In this new subsystem we'll try to properly maintain all the generic
  code related to dma-mapping, and will further consolidate arch code
  into common helpers.

  This pull request contains:

   - removal of the DMA_ERROR_CODE macro, replacing it with calls to
     ->mapping_error so that the dma_map_ops instances are more self
     contained and can be shared across architectures (me)

   - removal of the ->set_dma_mask method, which duplicates the
     ->dma_capable one in terms of functionality, but requires more
     duplicate code.

   - various updates for the coherent dma pool and related arm code
     (Vladimir)

   - various smaller cleanups (me)"

* tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits)
  ARM: dma-mapping: Remove traces of NOMMU code
  ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus
  ARM: NOMMU: Introduce dma operations for noMMU
  drivers: dma-mapping: allow dma_common_mmap() for NOMMU
  drivers: dma-coherent: Introduce default DMA pool
  drivers: dma-coherent: Account dma_pfn_offset when used with device tree
  dma: Take into account dma_pfn_offset
  dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs
  dma-mapping: remove dmam_free_noncoherent
  crypto: qat - avoid an uninitialized variable warning
  au1100fb: remove a bogus dma_free_nonconsistent call
  MAINTAINERS: add entry for dma mapping helpers
  powerpc: merge __dma_set_mask into dma_set_mask
  dma-mapping: remove the set_dma_mask method
  powerpc/cell: use the dma_supported method for ops switching
  powerpc/cell: clean up fixed mapping dma_ops initialization
  tile: remove dma_supported and mapping_error methods
  xen-swiotlb: remove xen_swiotlb_set_dma_mask
  arm: implement ->dma_supported instead of ->set_dma_mask
  mips/loongson64: implement ->dma_supported instead of ->set_dma_mask
  ...
This commit is contained in:
Linus Torvalds 2017-07-06 19:20:54 -07:00
commit f72e24a124
75 changed files with 778 additions and 725 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/gpu/drm/armada/armada_fb.c
View file

@ -133,7 +133,7 @@ static struct drm_framebuffer *armada_fb_create(struct drm_device *dev,
}
/* Framebuffer objects must have a valid device address for scanout */
if (obj->dev_addr == DMA_ERROR_CODE) {
if (!obj->mapped) {
ret = -EINVAL;
goto err_unref;
}

5
drivers/gpu/drm/armada/armada_gem.c
View file

@ -175,6 +175,7 @@ armada_gem_linear_back(struct drm_device *dev, struct armada_gem_object *obj)
obj->phys_addr = obj->linear->start;
obj->dev_addr = obj->linear->start;
obj->mapped = true;
}
DRM_DEBUG_DRIVER("obj %p phys %#llx dev %#llx\n", obj,
@ -205,7 +206,6 @@ armada_gem_alloc_private_object(struct drm_device *dev, size_t size)
return NULL;
drm_gem_private_object_init(dev, &obj->obj, size);
obj->dev_addr = DMA_ERROR_CODE;
DRM_DEBUG_DRIVER("alloc private obj %p size %zu\n", obj, size);
@ -229,8 +229,6 @@ static struct armada_gem_object *armada_gem_alloc_object(struct drm_device *dev,
return NULL;
}
obj->dev_addr = DMA_ERROR_CODE;
mapping = obj->obj.filp->f_mapping;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER | __GFP_RECLAIMABLE);
@ -610,5 +608,6 @@ int armada_gem_map_import(struct armada_gem_object *dobj)
return -EINVAL;
}
dobj->dev_addr = sg_dma_address(dobj->sgt->sgl);
dobj->mapped = true;
return 0;
}

1
drivers/gpu/drm/armada/armada_gem.h
View file

@ -16,6 +16,7 @@ struct armada_gem_object {
void *addr;
phys_addr_t phys_addr;
resource_size_t dev_addr;
bool mapped;
struct drm_mm_node *linear; /* for linear backed */
struct page *page; /* for page backed */
struct sg_table *sgt; /* for imported */

4
drivers/gpu/drm/exynos/exynos_drm_fb.c
View file

@ -181,8 +181,8 @@ dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
{
struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
if (index >= MAX_FB_BUFFER)
return DMA_ERROR_CODE;
if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
return 0;
return exynos_fb->dma_addr[index];
}