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104 lines
3.1 KiB
Diff
104 lines
3.1 KiB
Diff
From 203e0c39b262fc1da6f976495c32ec38ea93a137 Mon Sep 17 00:00:00 2001
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From: Christoph Hellwig <hch@lst.de>
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Date: Tue, 12 Nov 2019 17:06:04 +0100
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Subject: [PATCH] dma-direct: unify the dma_capable definitions
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commit 130c1ccbf55330b55e82612a6e54eebb82c9d746 upstream.
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Currently each architectures that wants to override dma_to_phys and
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phys_to_dma also has to provide dma_capable. But there isn't really
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any good reason for that. powerpc and mips just have copies of the
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generic one minus the latests fix, and the arm one was the inspiration
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for said fix, but misses the bus_dma_mask handling.
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Make all architectures use the generic version instead.
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Signed-off-by: Christoph Hellwig <hch@lst.de>
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Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
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Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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---
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arch/arm/include/asm/dma-direct.h | 19 -------------------
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arch/mips/include/asm/dma-direct.h | 8 --------
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arch/powerpc/include/asm/dma-direct.h | 9 ---------
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include/linux/dma-direct.h | 2 +-
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4 files changed, 1 insertion(+), 37 deletions(-)
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--- a/arch/arm/include/asm/dma-direct.h
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+++ b/arch/arm/include/asm/dma-direct.h
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@@ -14,23 +14,4 @@ static inline phys_addr_t __dma_to_phys(
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return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
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}
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-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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-{
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- u64 limit, mask;
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-
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- if (!dev->dma_mask)
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- return 0;
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-
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- mask = *dev->dma_mask;
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-
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- limit = (mask + 1) & ~mask;
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- if (limit && size > limit)
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- return 0;
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-
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- if ((addr | (addr + size - 1)) & ~mask)
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- return 0;
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-
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- return 1;
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-}
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-
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#endif /* ASM_ARM_DMA_DIRECT_H */
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--- a/arch/mips/include/asm/dma-direct.h
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+++ b/arch/mips/include/asm/dma-direct.h
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@@ -2,14 +2,6 @@
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#ifndef _MIPS_DMA_DIRECT_H
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#define _MIPS_DMA_DIRECT_H 1
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-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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-{
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- if (!dev->dma_mask)
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- return false;
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-
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- return addr + size - 1 <= *dev->dma_mask;
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-}
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-
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dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr);
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phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr);
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--- a/arch/powerpc/include/asm/dma-direct.h
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+++ b/arch/powerpc/include/asm/dma-direct.h
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@@ -2,15 +2,6 @@
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#ifndef ASM_POWERPC_DMA_DIRECT_H
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#define ASM_POWERPC_DMA_DIRECT_H 1
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-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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-{
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- if (!dev->dma_mask)
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- return false;
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-
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- return addr + size - 1 <=
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- min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
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-}
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-
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static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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if (!dev)
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--- a/include/linux/dma-direct.h
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+++ b/include/linux/dma-direct.h
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@@ -26,6 +26,7 @@ static inline phys_addr_t __dma_to_phys(
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return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
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}
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+#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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@@ -40,7 +41,6 @@ static inline bool dma_capable(struct de
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return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
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}
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-#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
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#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
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bool force_dma_unencrypted(struct device *dev);
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