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Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb

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Pull swiotlb updates from Konrad Rzeszutek Wilk:
 "Two memory encryption related patches (SWIOTLB is enabled by default
  for AMD-SEV):

   - Add support for alignment so that NVME can properly work

   - Keep track of requested DMA buffers length, as underlaying hardware
     devices can trip SWIOTLB to bounce too much and crash the kernel

  And a tiny fix to use proper APIs in drivers"

* 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: Validate bounce size in the sync/unmap path
  nvme-pci: set min_align_mask
  swiotlb: respect min_align_mask
  swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single
  swiotlb: refactor swiotlb_tbl_map_single
  swiotlb: clean up swiotlb_tbl_unmap_single
  swiotlb: factor out a nr_slots helper
  swiotlb: factor out an io_tlb_offset helper
  swiotlb: add a IO_TLB_SIZE define
  driver core: add a min_align_mask field to struct device_dma_parameters
  sdhci: stop poking into swiotlb internals
This commit is contained in:
Linus Torvalds
2021-02-26 13:59:32 -08:00
parent fecfd01539 daf9514fd5
commit ef9856a734
6 changed files with 229 additions and 137 deletions
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16
include/linux/dma-mapping.h
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@@ -509,6 +509,22 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
static inline unsigned int dma_get_min_align_mask(struct device *dev)
{
if (dev->dma_parms)
return dev->dma_parms->min_align_mask;
return 0;
}
static inline int dma_set_min_align_mask(struct device *dev,
unsigned int min_align_mask)
{
if (WARN_ON_ONCE(!dev->dma_parms))
return -EIO;
dev->dma_parms->min_align_mask = min_align_mask;
return 0;
}
static inline int dma_get_cache_alignment(void)
{
#ifdef ARCH_DMA_MINALIGN