diff options
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/contiguous.c | 6 | ||||
| -rw-r--r-- | kernel/dma/direct.c | 9 | ||||
| -rw-r--r-- | kernel/dma/noncoherent.c | 8 | ||||
| -rw-r--r-- | kernel/dma/swiotlb.c | 18 |
4 files changed, 22 insertions, 19 deletions
diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index d987dcd1bd56..286d82329eb0 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -178,7 +178,7 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, * @dev: Pointer to device for which the allocation is performed. * @count: Requested number of pages. * @align: Requested alignment of pages (in PAGE_SIZE order). - * @gfp_mask: GFP flags to use for this allocation. + * @no_warn: Avoid printing message about failed allocation. * * This function allocates memory buffer for specified device. It uses * device specific contiguous memory area if available or the default @@ -186,12 +186,12 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, * function. */ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, - unsigned int align, gfp_t gfp_mask) + unsigned int align, bool no_warn) { if (align > CONFIG_CMA_ALIGNMENT) align = CONFIG_CMA_ALIGNMENT; - return cma_alloc(dev_get_cma_area(dev), count, align, gfp_mask); + return cma_alloc(dev_get_cma_area(dev), count, align, no_warn); } /** diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 8be8106270c2..1c35b7b945d0 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -78,7 +78,8 @@ void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, again: /* CMA can be used only in the context which permits sleeping */ if (gfpflags_allow_blocking(gfp)) { - page = dma_alloc_from_contiguous(dev, count, page_order, gfp); + page = dma_alloc_from_contiguous(dev, count, page_order, + gfp & __GFP_NOWARN); if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { dma_release_from_contiguous(dev, page, count); page = NULL; @@ -180,10 +181,10 @@ int dma_direct_supported(struct device *dev, u64 mask) return 0; #endif /* - * Various PCI/PCIe bridges have broken support for > 32bit DMA even - * if the device itself might support it. + * Upstream PCI/PCIe bridges or SoC interconnects may not carry + * as many DMA address bits as the device itself supports. */ - if (dev->dma_32bit_limit && mask > DMA_BIT_MASK(32)) + if (dev->bus_dma_mask && mask > dev->bus_dma_mask) return 0; return 1; } diff --git a/kernel/dma/noncoherent.c b/kernel/dma/noncoherent.c index 79e9a757387f..031fe235d958 100644 --- a/kernel/dma/noncoherent.c +++ b/kernel/dma/noncoherent.c @@ -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, diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 904541055792..4f8a6dbf0b60 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -17,6 +17,8 @@ * 08/12/11 beckyb Add highmem support */ +#define pr_fmt(fmt) "software IO TLB: " fmt + #include <linux/cache.h> #include <linux/dma-direct.h> #include <linux/mm.h> @@ -162,20 +164,16 @@ static bool no_iotlb_memory; void swiotlb_print_info(void) { unsigned long bytes = io_tlb_nslabs << IO_TLB_SHIFT; - unsigned char *vstart, *vend; if (no_iotlb_memory) { - pr_warn("software IO TLB: No low mem\n"); + pr_warn("No low mem\n"); return; } - vstart = phys_to_virt(io_tlb_start); - vend = phys_to_virt(io_tlb_end); - - printk(KERN_INFO "software IO TLB [mem %#010llx-%#010llx] (%luMB) mapped at [%p-%p]\n", + pr_info("mapped [mem %#010llx-%#010llx] (%luMB)\n", (unsigned long long)io_tlb_start, (unsigned long long)io_tlb_end, - bytes >> 20, vstart, vend - 1); + bytes >> 20); } /* @@ -275,7 +273,7 @@ swiotlb_init(int verbose) if (io_tlb_start) memblock_free_early(io_tlb_start, PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); - pr_warn("Cannot allocate SWIOTLB buffer"); + pr_warn("Cannot allocate buffer"); no_iotlb_memory = true; } @@ -317,8 +315,8 @@ swiotlb_late_init_with_default_size(size_t default_size) return -ENOMEM; } if (order != get_order(bytes)) { - printk(KERN_WARNING "Warning: only able to allocate %ld MB " - "for software IO TLB\n", (PAGE_SIZE << order) >> 20); + pr_warn("only able to allocate %ld MB\n", + (PAGE_SIZE << order) >> 20); io_tlb_nslabs = SLABS_PER_PAGE << order; } rc = swiotlb_late_init_with_tbl(vstart, io_tlb_nslabs); |