X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=lib%2Fswiotlb.c;h=d568894df8ccd335c4acdcb47da4a7b3c4830150;hb=d0b53f6866fa185da94968e62ae97923db18298c;hp=50a43801018259422345f815b39876b6a1a6a78f;hpb=51099005ab8e09d68a13fea8d55bc739c1040ca6;p=h-e-n diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 50a4380..d568894 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -28,18 +28,16 @@ #include #include #include -#include #include #include +#include #define OFFSET(val,align) ((unsigned long) \ ( (val) & ( (align) - 1))) -#ifndef SG_ENT_VIRT_ADDRESS -#define SG_ENT_VIRT_ADDRESS(sg) (page_address((sg)->page) + (sg)->offset) +#define SG_ENT_VIRT_ADDRESS(sg) (sg_virt((sg))) #define SG_ENT_PHYS_ADDRESS(sg) virt_to_bus(SG_ENT_VIRT_ADDRESS(sg)) -#endif /* * Maximum allowable number of contiguous slabs to map, @@ -104,25 +102,13 @@ static unsigned int io_tlb_index; * We need to save away the original address corresponding to a mapped entry * for the sync operations. */ -#ifndef SWIOTLB_ARCH_HAS_IO_TLB_ADDR_T -typedef char *io_tlb_addr_t; -#define swiotlb_orig_addr_null(buffer) (!(buffer)) -#define ptr_to_io_tlb_addr(ptr) (ptr) -#define page_to_io_tlb_addr(pg, off) (page_address(pg) + (off)) -#define sg_to_io_tlb_addr(sg) SG_ENT_VIRT_ADDRESS(sg) -#endif -static io_tlb_addr_t *io_tlb_orig_addr; +static unsigned char **io_tlb_orig_addr; /* * Protect the above data structures in the map and unmap calls */ static DEFINE_SPINLOCK(io_tlb_lock); -#ifdef SWIOTLB_EXTRA_VARIABLES -SWIOTLB_EXTRA_VARIABLES; -#endif - -#ifndef SWIOTLB_ARCH_HAS_SETUP_IO_TLB_NPAGES static int __init setup_io_tlb_npages(char *str) { @@ -137,25 +123,9 @@ setup_io_tlb_npages(char *str) swiotlb_force = 1; return 1; } -#endif __setup("swiotlb=", setup_io_tlb_npages); /* make io_tlb_overflow tunable too? */ -#ifndef swiotlb_adjust_size -#define swiotlb_adjust_size(size) ((void)0) -#endif - -#ifndef swiotlb_adjust_seg -#define swiotlb_adjust_seg(start, size) ((void)0) -#endif - -#ifndef swiotlb_print_info -#define swiotlb_print_info(bytes) \ - printk(KERN_INFO "Placing %luMB software IO TLB between 0x%lx - " \ - "0x%lx\n", bytes >> 20, \ - virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end)) -#endif - /* * Statically reserve bounce buffer space and initialize bounce buffer data * structures for the software IO TLB used to implement the DMA API. @@ -169,8 +139,6 @@ swiotlb_init_with_default_size(size_t default_size) io_tlb_nslabs = (default_size >> IO_TLB_SHIFT); io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); } - swiotlb_adjust_size(io_tlb_nslabs); - swiotlb_adjust_size(io_tlb_overflow); bytes = io_tlb_nslabs << IO_TLB_SHIFT; @@ -188,14 +156,10 @@ swiotlb_init_with_default_size(size_t default_size) * between io_tlb_start and io_tlb_end. */ io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int)); - for (i = 0; i < io_tlb_nslabs; i++) { - if ( !(i % IO_TLB_SEGSIZE) ) - swiotlb_adjust_seg(io_tlb_start + (i << IO_TLB_SHIFT), - IO_TLB_SEGSIZE << IO_TLB_SHIFT); + for (i = 0; i < io_tlb_nslabs; i++) io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); - } io_tlb_index = 0; - io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(io_tlb_addr_t)); + io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(char *)); /* * Get the overflow emergency buffer @@ -203,21 +167,17 @@ swiotlb_init_with_default_size(size_t default_size) io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow); if (!io_tlb_overflow_buffer) panic("Cannot allocate SWIOTLB overflow buffer!\n"); - swiotlb_adjust_seg(io_tlb_overflow_buffer, io_tlb_overflow); - swiotlb_print_info(bytes); + printk(KERN_INFO "Placing software IO TLB between 0x%lx - 0x%lx\n", + virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end)); } -#ifndef __swiotlb_init_with_default_size -#define __swiotlb_init_with_default_size swiotlb_init_with_default_size -#endif void __init swiotlb_init(void) { - __swiotlb_init_with_default_size(64 * (1<<20)); /* default to 64MB */ + swiotlb_init_with_default_size(64 * (1<<20)); /* default to 64MB */ } -#ifdef SWIOTLB_ARCH_NEED_LATE_INIT /* * Systems with larger DMA zones (those that don't support ISA) can * initialize the swiotlb later using the slab allocator if needed. @@ -275,12 +235,12 @@ swiotlb_late_init_with_default_size(size_t default_size) io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); io_tlb_index = 0; - io_tlb_orig_addr = (io_tlb_addr_t *)__get_free_pages(GFP_KERNEL, - get_order(io_tlb_nslabs * sizeof(io_tlb_addr_t))); + io_tlb_orig_addr = (unsigned char **)__get_free_pages(GFP_KERNEL, + get_order(io_tlb_nslabs * sizeof(char *))); if (!io_tlb_orig_addr) goto cleanup3; - memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(io_tlb_addr_t)); + memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(char *)); /* * Get the overflow emergency buffer @@ -290,17 +250,19 @@ swiotlb_late_init_with_default_size(size_t default_size) if (!io_tlb_overflow_buffer) goto cleanup4; - swiotlb_print_info(bytes); + printk(KERN_INFO "Placing %luMB software IO TLB between 0x%lx - " + "0x%lx\n", bytes >> 20, + virt_to_bus(io_tlb_start), virt_to_bus(io_tlb_end)); return 0; cleanup4: - free_pages((unsigned long)io_tlb_orig_addr, - get_order(io_tlb_nslabs * sizeof(io_tlb_addr_t))); + free_pages((unsigned long)io_tlb_orig_addr, get_order(io_tlb_nslabs * + sizeof(char *))); io_tlb_orig_addr = NULL; cleanup3: - free_pages((unsigned long)io_tlb_list, - get_order(io_tlb_nslabs * sizeof(int))); + free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * + sizeof(int))); io_tlb_list = NULL; cleanup2: io_tlb_end = NULL; @@ -310,10 +272,8 @@ cleanup1: io_tlb_nslabs = req_nslabs; return -ENOMEM; } -#endif -#ifndef SWIOTLB_ARCH_HAS_NEEDS_MAPPING -static inline int +static int address_needs_mapping(struct device *hwdev, dma_addr_t addr) { dma_addr_t mask = 0xffffffff; @@ -323,40 +283,28 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr) return (addr & ~mask) != 0; } -static inline int range_needs_mapping(const void *ptr, size_t size) -{ - return swiotlb_force; -} - -static inline int order_needs_mapping(unsigned int order) -{ - return 0; -} -#endif - -static void -__sync_single(io_tlb_addr_t buffer, char *dma_addr, size_t size, int dir) -{ -#ifndef SWIOTLB_ARCH_HAS_SYNC_SINGLE - if (dir == DMA_TO_DEVICE) - memcpy(dma_addr, buffer, size); - else - memcpy(buffer, dma_addr, size); -#else - __swiotlb_arch_sync_single(buffer, dma_addr, size, dir); -#endif -} - /* * Allocates bounce buffer and returns its kernel virtual address. */ static void * -map_single(struct device *hwdev, io_tlb_addr_t buffer, size_t size, int dir) +map_single(struct device *hwdev, char *buffer, size_t size, int dir) { unsigned long flags; char *dma_addr; unsigned int nslots, stride, index, wrap; int i; + unsigned long start_dma_addr; + unsigned long mask; + unsigned long offset_slots; + unsigned long max_slots; + + mask = dma_get_seg_boundary(hwdev); + start_dma_addr = virt_to_bus(io_tlb_start) & mask; + + offset_slots = ALIGN(start_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; + max_slots = mask + 1 + ? ALIGN(mask + 1, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT + : 1UL << (BITS_PER_LONG - IO_TLB_SHIFT); /* * For mappings greater than a page, we limit the stride (and @@ -375,46 +323,53 @@ map_single(struct device *hwdev, io_tlb_addr_t buffer, size_t size, int dir) * request and allocate a buffer from that IO TLB pool. */ spin_lock_irqsave(&io_tlb_lock, flags); - { - wrap = index = ALIGN(io_tlb_index, stride); + index = ALIGN(io_tlb_index, stride); + if (index >= io_tlb_nslabs) + index = 0; + wrap = index; + + do { + while (iommu_is_span_boundary(index, nslots, offset_slots, + max_slots)) { + index += stride; + if (index >= io_tlb_nslabs) + index = 0; + if (index == wrap) + goto not_found; + } - if (index >= io_tlb_nslabs) - wrap = index = 0; + /* + * If we find a slot that indicates we have 'nslots' number of + * contiguous buffers, we allocate the buffers from that slot + * and mark the entries as '0' indicating unavailable. + */ + if (io_tlb_list[index] >= nslots) { + int count = 0; + + for (i = index; i < (int) (index + nslots); i++) + io_tlb_list[i] = 0; + for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && io_tlb_list[i]; i--) + io_tlb_list[i] = ++count; + dma_addr = io_tlb_start + (index << IO_TLB_SHIFT); - do { /* - * If we find a slot that indicates we have 'nslots' - * number of contiguous buffers, we allocate the - * buffers from that slot and mark the entries as '0' - * indicating unavailable. + * Update the indices to avoid searching in the next + * round. */ - if (io_tlb_list[index] >= nslots) { - int count = 0; - - for (i = index; i < (int) (index + nslots); i++) - io_tlb_list[i] = 0; - for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE -1) && io_tlb_list[i]; i--) - io_tlb_list[i] = ++count; - dma_addr = io_tlb_start + (index << IO_TLB_SHIFT); - - /* - * Update the indices to avoid searching in - * the next round. - */ - io_tlb_index = ((index + nslots) < io_tlb_nslabs - ? (index + nslots) : 0); - - goto found; - } - index += stride; - if (index >= io_tlb_nslabs) - index = 0; - } while (index != wrap); + io_tlb_index = ((index + nslots) < io_tlb_nslabs + ? (index + nslots) : 0); - spin_unlock_irqrestore(&io_tlb_lock, flags); - return NULL; - } - found: + goto found; + } + index += stride; + if (index >= io_tlb_nslabs) + index = 0; + } while (index != wrap); + +not_found: + spin_unlock_irqrestore(&io_tlb_lock, flags); + return NULL; +found: spin_unlock_irqrestore(&io_tlb_lock, flags); /* @@ -422,9 +377,10 @@ map_single(struct device *hwdev, io_tlb_addr_t buffer, size_t size, int dir) * This is needed when we sync the memory. Then we sync the buffer if * needed. */ - io_tlb_orig_addr[index] = buffer; + for (i = 0; i < nslots; i++) + io_tlb_orig_addr[index+i] = buffer + (i << IO_TLB_SHIFT); if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) - __sync_single(buffer, dma_addr, size, DMA_TO_DEVICE); + memcpy(dma_addr, buffer, size); return dma_addr; } @@ -438,18 +394,17 @@ unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir) unsigned long flags; int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT; - io_tlb_addr_t buffer = io_tlb_orig_addr[index]; + char *buffer = io_tlb_orig_addr[index]; /* * First, sync the memory before unmapping the entry */ - if (!swiotlb_orig_addr_null(buffer) - && ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL))) + if (buffer && ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL))) /* * bounce... copy the data back into the original buffer * and * delete the bounce buffer. */ - __sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE); + memcpy(buffer, dma_addr, size); /* * Return the buffer to the free list by setting the corresponding @@ -482,18 +437,20 @@ sync_single(struct device *hwdev, char *dma_addr, size_t size, int dir, int target) { int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT; - io_tlb_addr_t buffer = io_tlb_orig_addr[index]; + char *buffer = io_tlb_orig_addr[index]; + + buffer += ((unsigned long)dma_addr & ((1 << IO_TLB_SHIFT) - 1)); switch (target) { case SYNC_FOR_CPU: if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) - __sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE); + memcpy(buffer, dma_addr, size); else BUG_ON(dir != DMA_TO_DEVICE); break; case SYNC_FOR_DEVICE: if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)) - __sync_single(buffer, dma_addr, size, DMA_TO_DEVICE); + memcpy(dma_addr, buffer, size); else BUG_ON(dir != DMA_FROM_DEVICE); break; @@ -502,8 +459,6 @@ sync_single(struct device *hwdev, char *dma_addr, size_t size, } } -#ifdef SWIOTLB_ARCH_NEED_ALLOC - void * swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags) @@ -519,10 +474,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, */ flags |= GFP_DMA; - if (!order_needs_mapping(order)) - ret = (void *)__get_free_pages(flags, order); - else - ret = NULL; + ret = (void *)__get_free_pages(flags, order); if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) { /* * The allocated memory isn't reachable by the device. @@ -560,12 +512,12 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, *dma_handle = dev_addr; return ret; } -EXPORT_SYMBOL(swiotlb_alloc_coherent); void swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle) { + WARN_ON(irqs_disabled()); if (!(vaddr >= (void *)io_tlb_start && vaddr < (void *)io_tlb_end)) free_pages((unsigned long) vaddr, get_order(size)); @@ -573,9 +525,6 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, /* DMA_TO_DEVICE to avoid memcpy in unmap_single */ swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE); } -EXPORT_SYMBOL(swiotlb_free_coherent); - -#endif static void swiotlb_full(struct device *dev, size_t size, int dir, int do_panic) @@ -606,7 +555,8 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic) * either swiotlb_unmap_single or swiotlb_dma_sync_single is performed. */ dma_addr_t -swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir) +swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size, + int dir, struct dma_attrs *attrs) { dma_addr_t dev_addr = virt_to_bus(ptr); void *map; @@ -617,14 +567,13 @@ swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir) * we can safely return the device addr and not worry about bounce * buffering it. */ - if (!range_needs_mapping(ptr, size) - && !address_needs_mapping(hwdev, dev_addr)) + if (!address_needs_mapping(hwdev, dev_addr) && !swiotlb_force) return dev_addr; /* * Oh well, have to allocate and map a bounce buffer. */ - map = map_single(hwdev, ptr_to_io_tlb_addr(ptr), size, dir); + map = map_single(hwdev, ptr, size, dir); if (!map) { swiotlb_full(hwdev, size, dir, 1); map = io_tlb_overflow_buffer; @@ -640,6 +589,13 @@ swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir) return dev_addr; } +EXPORT_SYMBOL(swiotlb_map_single_attrs); + +dma_addr_t +swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir) +{ + return swiotlb_map_single_attrs(hwdev, ptr, size, dir, NULL); +} /* * Unmap a single streaming mode DMA translation. The dma_addr and size must @@ -650,8 +606,8 @@ swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir) * whatever the device wrote there. */ void -swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, - int dir) +swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr, + size_t size, int dir, struct dma_attrs *attrs) { char *dma_addr = bus_to_virt(dev_addr); @@ -661,7 +617,14 @@ swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, else if (dir == DMA_FROM_DEVICE) dma_mark_clean(dma_addr, size); } +EXPORT_SYMBOL(swiotlb_unmap_single_attrs); +void +swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, + int dir) +{ + return swiotlb_unmap_single_attrs(hwdev, dev_addr, size, dir, NULL); +} /* * Make physical memory consistent for a single streaming mode DMA translation * after a transfer. @@ -672,7 +635,7 @@ swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, * address back to the card, you must first perform a * swiotlb_dma_sync_for_device, and then the device again owns the buffer */ -static inline void +static void swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, int dir, int target) { @@ -702,7 +665,7 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, /* * Same as above, but for a sub-range of the mapping. */ -static inline void +static void swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr, unsigned long offset, size_t size, int dir, int target) @@ -732,6 +695,8 @@ swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, SYNC_FOR_DEVICE); } +void swiotlb_unmap_sg_attrs(struct device *, struct scatterlist *, int, int, + struct dma_attrs *); /* * Map a set of buffers described by scatterlist in streaming mode for DMA. * This is the scatter-gather version of the above swiotlb_map_single @@ -749,25 +714,28 @@ swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, * same here. */ int -swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nelems, - int dir) +swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, + int dir, struct dma_attrs *attrs) { + struct scatterlist *sg; + void *addr; dma_addr_t dev_addr; int i; BUG_ON(dir == DMA_NONE); - for (i = 0; i < nelems; i++, sg++) { - dev_addr = SG_ENT_PHYS_ADDRESS(sg); - if (range_needs_mapping(SG_ENT_VIRT_ADDRESS(sg), sg->length) - || address_needs_mapping(hwdev, dev_addr)) { - void *map = map_single(hwdev, sg_to_io_tlb_addr(sg), sg->length, dir); + for_each_sg(sgl, sg, nelems, i) { + addr = SG_ENT_VIRT_ADDRESS(sg); + dev_addr = virt_to_bus(addr); + if (swiotlb_force || address_needs_mapping(hwdev, dev_addr)) { + void *map = map_single(hwdev, addr, sg->length, dir); if (!map) { /* Don't panic here, we expect map_sg users to do proper error handling. */ swiotlb_full(hwdev, sg->length, dir, 0); - swiotlb_unmap_sg(hwdev, sg - i, i, dir); - sg[0].dma_length = 0; + swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir, + attrs); + sgl[0].dma_length = 0; return 0; } sg->dma_address = virt_to_bus(map); @@ -777,25 +745,43 @@ swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nelems, } return nelems; } +EXPORT_SYMBOL(swiotlb_map_sg_attrs); + +int +swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems, + int dir) +{ + return swiotlb_map_sg_attrs(hwdev, sgl, nelems, dir, NULL); +} /* * Unmap a set of streaming mode DMA translations. Again, cpu read rules * concerning calls here are the same as for swiotlb_unmap_single() above. */ void -swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nelems, - int dir) +swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, + int nelems, int dir, struct dma_attrs *attrs) { + struct scatterlist *sg; int i; BUG_ON(dir == DMA_NONE); - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sgl, sg, nelems, i) { if (sg->dma_address != SG_ENT_PHYS_ADDRESS(sg)) unmap_single(hwdev, bus_to_virt(sg->dma_address), sg->dma_length, dir); else if (dir == DMA_FROM_DEVICE) dma_mark_clean(SG_ENT_VIRT_ADDRESS(sg), sg->dma_length); + } +} +EXPORT_SYMBOL(swiotlb_unmap_sg_attrs); + +void +swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems, + int dir) +{ + return swiotlb_unmap_sg_attrs(hwdev, sgl, nelems, dir, NULL); } /* @@ -805,20 +791,22 @@ swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nelems, * The same as swiotlb_sync_single_* but for a scatter-gather list, same rules * and usage. */ -static inline void -swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sg, +static void +swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl, int nelems, int dir, int target) { + struct scatterlist *sg; int i; BUG_ON(dir == DMA_NONE); - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sgl, sg, nelems, i) { if (sg->dma_address != SG_ENT_PHYS_ADDRESS(sg)) sync_single(hwdev, bus_to_virt(sg->dma_address), sg->dma_length, dir, target); else if (dir == DMA_FROM_DEVICE) dma_mark_clean(SG_ENT_VIRT_ADDRESS(sg), sg->dma_length); + } } void @@ -835,44 +823,6 @@ swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE); } -#ifdef SWIOTLB_ARCH_NEED_MAP_PAGE - -dma_addr_t -swiotlb_map_page(struct device *hwdev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - dma_addr_t dev_addr; - char *map; - - dev_addr = page_to_bus(page) + offset; - if (address_needs_mapping(hwdev, dev_addr)) { - map = map_single(hwdev, page_to_io_tlb_addr(page, offset), size, direction); - if (!map) { - swiotlb_full(hwdev, size, direction, 1); - map = io_tlb_overflow_buffer; - } - dev_addr = virt_to_bus(map); - } - - return dev_addr; -} - -void -swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, - size_t size, enum dma_data_direction direction) -{ - char *dma_addr = bus_to_virt(dev_addr); - - BUG_ON(direction == DMA_NONE); - if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end) - unmap_single(hwdev, dma_addr, size, direction); - else if (direction == DMA_FROM_DEVICE) - dma_mark_clean(dma_addr, size); -} - -#endif - int swiotlb_dma_mapping_error(dma_addr_t dma_addr) { @@ -885,16 +835,12 @@ swiotlb_dma_mapping_error(dma_addr_t dma_addr) * during bus mastering, then you would pass 0x00ffffff as the mask to * this function. */ -#ifndef __swiotlb_dma_supported -#define __swiotlb_dma_supported(hwdev, mask) (virt_to_bus(io_tlb_end - 1) <= (mask)) -#endif int swiotlb_dma_supported(struct device *hwdev, u64 mask) { - return __swiotlb_dma_supported(hwdev, mask); + return virt_to_bus(io_tlb_end - 1) <= mask; } -EXPORT_SYMBOL(swiotlb_init); EXPORT_SYMBOL(swiotlb_map_single); EXPORT_SYMBOL(swiotlb_unmap_single); EXPORT_SYMBOL(swiotlb_map_sg); @@ -906,4 +852,6 @@ EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device); EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu); EXPORT_SYMBOL(swiotlb_sync_sg_for_device); EXPORT_SYMBOL(swiotlb_dma_mapping_error); +EXPORT_SYMBOL(swiotlb_alloc_coherent); +EXPORT_SYMBOL(swiotlb_free_coherent); EXPORT_SYMBOL(swiotlb_dma_supported);