target/linux/bcm27xx/patches-5.4/950-0451-dma-direct-avoid-a-forward-declaration-for-phys_to_d.patch

   1 From a3794022e928547de664abd03b61280163c7f13a Mon Sep 17 00:00:00 2001
   2 From: Christoph Hellwig <hch@lst.de>
   3 Date: Tue, 12 Nov 2019 17:07:43 +0100
   4 Subject: [PATCH] dma-direct: avoid a forward declaration for
   5  phys_to_dma
   6
   7 Move dma_capable down a bit so that we don't need a forward declaration
   8 for phys_to_dma.
   9
  10 Signed-off-by: Christoph Hellwig <hch@lst.de>
  11 Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  12 (cherry picked from commit c7345159f7db6fb69ec1c3b3f8f28cd05c731be2)
  13 ---
  14  include/linux/dma-direct.h | 30 ++++++++++++++----------------
  15  1 file changed, 14 insertions(+), 16 deletions(-)
  16
  17 --- a/include/linux/dma-direct.h
  18 +++ b/include/linux/dma-direct.h
  19 @@ -6,8 +6,6 @@
  20  #include <linux/memblock.h> /* for min_low_pfn */
  21  #include <linux/mem_encrypt.h>
  22
  23 -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
  24 -
  25  extern unsigned int zone_dma_bits;
  26
  27  #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
  28 @@ -28,20 +26,6 @@ static inline phys_addr_t __dma_to_phys(
  29  }
  30  #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
  31
  32 -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  33 -{
  34 -       dma_addr_t end = addr + size - 1;
  35 -
  36 -       if (!dev->dma_mask)
  37 -               return false;
  38 -
  39 -       if (!IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
  40 -           min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
  41 -               return false;
  42 -
  43 -       return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
  44 -}
  45 -
  46  #ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
  47  bool force_dma_unencrypted(struct device *dev);
  48  #else
  49 @@ -67,6 +51,20 @@ static inline phys_addr_t dma_to_phys(st
  50         return __sme_clr(__dma_to_phys(dev, daddr));
  51  }
  52
  53 +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  54 +{
  55 +       dma_addr_t end = addr + size - 1;
  56 +
  57 +       if (!dev->dma_mask)
  58 +               return false;
  59 +
  60 +       if (!IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
  61 +           min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
  62 +               return false;
  63 +
  64 +       return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
  65 +}
  66 +
  67  u64 dma_direct_get_required_mask(struct device *dev);
  68  void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
  69                 gfp_t gfp, unsigned long attrs);