diff options
| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-10 05:04:58 +0400 |
|---|---|---|
| committer | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-28 09:19:19 +0400 |
| commit | b9394647ac88faad9db0f9e92eac4db434faded6 (patch) | |
| tree | 23f44b8c06baedad1183afc9be95fb2a12e183bb /lib/swiotlb.c | |
| parent | 9a937c91eea31c4b594ea49a2a23c57003e04987 (diff) | |
| download | linux-b9394647ac88faad9db0f9e92eac4db434faded6.tar.xz | |
swiotlb: use dma_capable()
This converts swiotlb to use dma_capable() instead of
swiotlb_arch_address_needs_mapping() and is_buffer_dma_capable().
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
Diffstat (limited to 'lib/swiotlb.c')
| -rw-r--r-- | lib/swiotlb.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index cba3db809fbc..a012d93792b7 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -131,12 +131,6 @@ static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev, return swiotlb_phys_to_bus(hwdev, virt_to_phys(address)); } -int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev, - dma_addr_t addr, size_t size) -{ - return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); -} - static void swiotlb_print_info(unsigned long bytes) { phys_addr_t pstart, pend; @@ -297,12 +291,6 @@ cleanup1: return -ENOMEM; } -static inline int -address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size) -{ - return swiotlb_arch_address_needs_mapping(hwdev, addr, size); -} - static int is_swiotlb_buffer(phys_addr_t paddr) { return paddr >= virt_to_phys(io_tlb_start) && @@ -539,9 +527,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_mask = hwdev->coherent_dma_mask; ret = (void *)__get_free_pages(flags, order); - if (ret && - !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(hwdev, ret), - size)) { + if (ret && swiotlb_virt_to_bus(hwdev, ret) + size > dma_mask) { /* * The allocated memory isn't reachable by the device. */ @@ -563,7 +549,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, dev_addr = swiotlb_virt_to_bus(hwdev, ret); /* Confirm address can be DMA'd by device */ - if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) { + if (dev_addr + size > dma_mask) { printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n", (unsigned long long)dma_mask, (unsigned long long)dev_addr); @@ -635,7 +621,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, * we can safely return the device addr and not worry about bounce * buffering it. */ - if (!address_needs_mapping(dev, dev_addr, size) && !swiotlb_force) + if (dma_capable(dev, dev_addr, size) && !swiotlb_force) return dev_addr; /* @@ -652,7 +638,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, /* * Ensure that the address returned is DMA'ble */ - if (address_needs_mapping(dev, dev_addr, size)) + if (!dma_capable(dev, dev_addr, size)) panic("map_single: bounce buffer is not DMA'ble"); return dev_addr; @@ -805,7 +791,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr); if (swiotlb_force || - address_needs_mapping(hwdev, dev_addr, sg->length)) { + !dma_capable(hwdev, dev_addr, sg->length)) { void *map = map_single(hwdev, sg_phys(sg), sg->length, dir); if (!map) { |