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dma-noncoherent: add a arch_sync_dma_for_cpu_all hook

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The MIPS bmips platform needs a global flush when transferring ownership
back to the CPU.  Add a hook for that to the dma-noncoherent
implementation.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19549/
Signed-off-by: Paul Burton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: David Daney <[email protected]>
Cc: Kevin Cernekee <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Tom Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]
This commit is contained in:
Christoph Hellwig authored and Paul Burton committed 2018-06-24 09:27:27 -07:00
1 parent c5e2bbb45d
commit faef87723a
2 files changed
+14 -2
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include/linux/dma-noncoherent.h
+8
View File
@@ -44,4 +44,12 @@ static inline void arch_sync_dma_for_cpu(struct device *dev,
}
#endif /* ARCH_HAS_SYNC_DMA_FOR_CPU */
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
void arch_sync_dma_for_cpu_all(struct device *dev);
#else
static inline void arch_sync_dma_for_cpu_all(struct device *dev)
{
}
#endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */
#endif /* _LINUX_DMA_NONCOHERENT_H */
kernel/dma/noncoherent.c
+6 -2
View File
@@ -49,11 +49,13 @@ static int dma_noncoherent_map_sg(struct device *dev, struct scatterlist *sgl,
return nents;
}
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
static void dma_noncoherent_sync_single_for_cpu(struct device *dev,
dma_addr_t addr, size_t size, enum dma_data_direction dir)
{
arch_sync_dma_for_cpu(dev, dma_to_phys(dev, addr), size, dir);
arch_sync_dma_for_cpu_all(dev);
}
static void dma_noncoherent_sync_sg_for_cpu(struct device *dev,
@@ -64,6 +66,7 @@ static void dma_noncoherent_sync_sg_for_cpu(struct device *dev,
for_each_sg(sgl, sg, nents, i)
arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
arch_sync_dma_for_cpu_all(dev);
}
static void dma_noncoherent_unmap_page(struct device *dev, dma_addr_t addr,
@@ -89,7 +92,8 @@ const struct dma_map_ops dma_noncoherent_ops = {
.sync_sg_for_device = dma_noncoherent_sync_sg_for_device,
.map_page = dma_noncoherent_map_page,
.map_sg = dma_noncoherent_map_sg,
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
.sync_single_for_cpu = dma_noncoherent_sync_single_for_cpu,
.sync_sg_for_cpu = dma_noncoherent_sync_sg_for_cpu,
.unmap_page = dma_noncoherent_unmap_page,