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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

20
drivers/iommu/amd_iommu.c
View file

@ -54,6 +54,8 @@
#include "amd_iommu_types.h"
#include "irq_remapping.h"
#define AMD_IOMMU_MAPPING_ERROR 0
#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
#define LOOP_TIMEOUT 100000
@ -2394,7 +2396,7 @@ static dma_addr_t __map_single(struct device *dev,
paddr &= PAGE_MASK;
address = dma_ops_alloc_iova(dev, dma_dom, pages, dma_mask);
if (address == DMA_ERROR_CODE)
if (address == AMD_IOMMU_MAPPING_ERROR)
goto out;
prot = dir2prot(direction);
@ -2431,7 +2433,7 @@ out_unmap:
dma_ops_free_iova(dma_dom, address, pages);
return DMA_ERROR_CODE;
return AMD_IOMMU_MAPPING_ERROR;
}
/*
@ -2483,7 +2485,7 @@ static dma_addr_t map_page(struct device *dev, struct page *page,
if (PTR_ERR(domain) == -EINVAL)
return (dma_addr_t)paddr;
else if (IS_ERR(domain))
return DMA_ERROR_CODE;
return AMD_IOMMU_MAPPING_ERROR;
dma_mask = *dev->dma_mask;
dma_dom = to_dma_ops_domain(domain);
@ -2560,7 +2562,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
npages = sg_num_pages(dev, sglist, nelems);
address = dma_ops_alloc_iova(dev, dma_dom, npages, dma_mask);
if (address == DMA_ERROR_CODE)
if (address == AMD_IOMMU_MAPPING_ERROR)
goto out_err;
prot = dir2prot(direction);
@ -2683,7 +2685,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
*dma_addr = __map_single(dev, dma_dom, page_to_phys(page),
size, DMA_BIDIRECTIONAL, dma_mask);
if (*dma_addr == DMA_ERROR_CODE)
if (*dma_addr == AMD_IOMMU_MAPPING_ERROR)
goto out_free;
return page_address(page);
@ -2729,9 +2731,16 @@ free_mem:
*/
static int amd_iommu_dma_supported(struct device *dev, u64 mask)
{
if (!x86_dma_supported(dev, mask))
return 0;
return check_device(dev);
}
static int amd_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == AMD_IOMMU_MAPPING_ERROR;
}
static const struct dma_map_ops amd_iommu_dma_ops = {
.alloc = alloc_coherent,
.free = free_coherent,
@ -2740,6 +2749,7 @@ static const struct dma_map_ops amd_iommu_dma_ops = {
.map_sg = map_sg,
.unmap_sg = unmap_sg,
.dma_supported = amd_iommu_dma_supported,
.mapping_error = amd_iommu_mapping_error,
};
static int init_reserved_iova_ranges(void)

18
drivers/iommu/dma-iommu.c
View file

@ -31,6 +31,8 @@
#include <linux/scatterlist.h>
#include <linux/vmalloc.h>
#define IOMMU_MAPPING_ERROR 0
struct iommu_dma_msi_page {
struct list_head list;
dma_addr_t iova;
@ -500,7 +502,7 @@ void iommu_dma_free(struct device *dev, struct page **pages, size_t size,
{
__iommu_dma_unmap(iommu_get_domain_for_dev(dev), *handle, size);
__iommu_dma_free_pages(pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
*handle = DMA_ERROR_CODE;
*handle = IOMMU_MAPPING_ERROR;
}
/**
@ -533,7 +535,7 @@ struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp,
dma_addr_t iova;
unsigned int count, min_size, alloc_sizes = domain->pgsize_bitmap;
*handle = DMA_ERROR_CODE;
*handle = IOMMU_MAPPING_ERROR;
min_size = alloc_sizes & -alloc_sizes;
if (min_size < PAGE_SIZE) {
@ -627,11 +629,11 @@ static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
iova = iommu_dma_alloc_iova(domain, size, dma_get_mask(dev), dev);
if (!iova)
return DMA_ERROR_CODE;
return IOMMU_MAPPING_ERROR;
if (iommu_map(domain, iova, phys - iova_off, size, prot)) {
iommu_dma_free_iova(cookie, iova, size);
return DMA_ERROR_CODE;
return IOMMU_MAPPING_ERROR;
}
return iova + iova_off;
}
@ -671,7 +673,7 @@ static int __finalise_sg(struct device *dev, struct scatterlist *sg, int nents,
s->offset += s_iova_off;
s->length = s_length;
sg_dma_address(s) = DMA_ERROR_CODE;
sg_dma_address(s) = IOMMU_MAPPING_ERROR;
sg_dma_len(s) = 0;
/*
@ -714,11 +716,11 @@ static void __invalidate_sg(struct scatterlist *sg, int nents)
int i;
for_each_sg(sg, s, nents, i) {
if (sg_dma_address(s) != DMA_ERROR_CODE)
if (sg_dma_address(s) != IOMMU_MAPPING_ERROR)
s->offset += sg_dma_address(s);
if (sg_dma_len(s))
s->length = sg_dma_len(s);
sg_dma_address(s) = DMA_ERROR_CODE;
sg_dma_address(s) = IOMMU_MAPPING_ERROR;
sg_dma_len(s) = 0;
}
}
@ -836,7 +838,7 @@ void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
int iommu_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == DMA_ERROR_CODE;
return dma_addr == IOMMU_MAPPING_ERROR;
}
static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev,

3
drivers/iommu/intel-iommu.c
View file

@ -3981,6 +3981,9 @@ struct dma_map_ops intel_dma_ops = {
.map_page = intel_map_page,
.unmap_page = intel_unmap_page,
.mapping_error = intel_mapping_error,
#ifdef CONFIG_X86
.dma_supported = x86_dma_supported,
#endif
};
static inline int iommu_domain_cache_init(void)