diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-12-03 11:14:09 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-13 21:06:16 +0100 |
| commit | 17ac524719f3fc88c1a90528f4789e4b4f618512 (patch) | |
| tree | 74b15a90304fbfabbd20fff234cf966bf8095add /kernel/dma/direct.c | |
| parent | 58dfd4ac022037c6a562e92fc6d2a778819b2162 (diff) | |
dma-direct: use dma_direct_map_page to implement dma_direct_map_sg
No need to duplicate the mapping logic.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel/dma/direct.c')
| -rw-r--r-- | kernel/dma/direct.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index edb24f94ea1e..d45306473c90 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -217,6 +217,7 @@ static void dma_direct_sync_single_for_device(struct device *dev, arch_sync_dma_for_device(dev, dma_to_phys(dev, addr), size, dir); } +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) static void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir) { @@ -229,6 +230,7 @@ static void dma_direct_sync_sg_for_device(struct device *dev, for_each_sg(sgl, sg, nents, i) arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir); } +#endif #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) @@ -294,19 +296,13 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, struct scatterlist *sg; for_each_sg(sgl, sg, nents, i) { - BUG_ON(!sg_page(sg)); - - sg_dma_address(sg) = phys_to_dma(dev, sg_phys(sg)); - if (unlikely(dev && !dma_capable(dev, sg_dma_address(sg), - sg->length))) { - report_addr(dev, sg_dma_address(sg), sg->length); + sg->dma_address = dma_direct_map_page(dev, sg_page(sg), + sg->offset, sg->length, dir, attrs); + if (sg->dma_address == DMA_MAPPING_ERROR) return 0; - } sg_dma_len(sg) = sg->length; } - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - dma_direct_sync_sg_for_device(dev, sgl, nents, dir); return nents; } |