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lib/swiotlb.c
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/* * Dynamic DMA mapping support. * |
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* This implementation is a fallback for platforms that do not support |
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* I/O TLBs (aka DMA address translation hardware). * Copyright (C) 2000 Asit Mallick <Asit.K.Mallick@intel.com> * Copyright (C) 2000 Goutham Rao <goutham.rao@intel.com> * Copyright (C) 2000, 2003 Hewlett-Packard Co * David Mosberger-Tang <davidm@hpl.hp.com> * * 03/05/07 davidm Switch from PCI-DMA to generic device DMA API. * 00/12/13 davidm Rename to swiotlb.c and add mark_clean() to avoid * unnecessary i-cache flushing. |
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* 04/07/.. ak Better overflow handling. Assorted fixes. * 05/09/10 linville Add support for syncing ranges, support syncing for * DMA_BIDIRECTIONAL mappings, miscellaneous cleanup. |
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* 08/12/11 beckyb Add highmem support |
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*/ #include <linux/cache.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/mm.h> |
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#include <linux/export.h> |
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#include <linux/spinlock.h> #include <linux/string.h> |
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#include <linux/swiotlb.h> |
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#include <linux/pfn.h> |
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#include <linux/types.h> #include <linux/ctype.h> |
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#include <linux/highmem.h> |
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#include <linux/gfp.h> |
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#include <asm/io.h> |
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#include <asm/dma.h> |
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#include <asm/scatterlist.h> |
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#include <linux/init.h> #include <linux/bootmem.h> |
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#include <linux/iommu-helper.h> |
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|
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#define CREATE_TRACE_POINTS |
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#include <trace/events/swiotlb.h> |
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#define OFFSET(val,align) ((unsigned long) \ ( (val) & ( (align) - 1))) |
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#define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT)) /* * Minimum IO TLB size to bother booting with. Systems with mainly * 64bit capable cards will only lightly use the swiotlb. If we can't * allocate a contiguous 1MB, we're probably in trouble anyway. */ #define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT) |
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int swiotlb_force; /* |
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* Used to do a quick range check in swiotlb_tbl_unmap_single and * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this |
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* API. */ |
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static phys_addr_t io_tlb_start, io_tlb_end; |
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/* |
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* The number of IO TLB blocks (in groups of 64) between io_tlb_start and |
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* io_tlb_end. This is command line adjustable via setup_io_tlb_npages. */ static unsigned long io_tlb_nslabs; /* * When the IOMMU overflows we return a fallback buffer. This sets the size. */ static unsigned long io_tlb_overflow = 32*1024; |
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static phys_addr_t io_tlb_overflow_buffer; |
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/* * This is a free list describing the number of free entries available from * each index */ static unsigned int *io_tlb_list; static unsigned int io_tlb_index; /* * We need to save away the original address corresponding to a mapped entry * for the sync operations. */ |
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static phys_addr_t *io_tlb_orig_addr; |
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/* * Protect the above data structures in the map and unmap calls */ static DEFINE_SPINLOCK(io_tlb_lock); |
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static int late_alloc; |
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static int __init setup_io_tlb_npages(char *str) { if (isdigit(*str)) { |
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io_tlb_nslabs = simple_strtoul(str, &str, 0); |
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/* avoid tail segment of size < IO_TLB_SEGSIZE */ io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); } if (*str == ',') ++str; |
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if (!strcmp(str, "force")) |
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swiotlb_force = 1; |
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|
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return 0; |
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} |
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early_param("swiotlb", setup_io_tlb_npages); |
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/* make io_tlb_overflow tunable too? */ |
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unsigned long swiotlb_nr_tbl(void) |
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{ return io_tlb_nslabs; } |
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EXPORT_SYMBOL_GPL(swiotlb_nr_tbl); |
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/* default to 64MB */ #define IO_TLB_DEFAULT_SIZE (64UL<<20) unsigned long swiotlb_size_or_default(void) { unsigned long size; size = io_tlb_nslabs << IO_TLB_SHIFT; return size ? size : (IO_TLB_DEFAULT_SIZE); } |
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/* Note that this doesn't work with highmem page */ |
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static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev, volatile void *address) |
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{ |
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return phys_to_dma(hwdev, virt_to_phys(address)); |
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} |
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static bool no_iotlb_memory; |
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void swiotlb_print_info(void) |
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{ |
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unsigned long bytes = io_tlb_nslabs << IO_TLB_SHIFT; |
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unsigned char *vstart, *vend; |
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|
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if (no_iotlb_memory) { pr_warn("software IO TLB: No low mem "); return; } |
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vstart = phys_to_virt(io_tlb_start); |
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vend = phys_to_virt(io_tlb_end); |
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|
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printk(KERN_INFO "software IO TLB [mem %#010llx-%#010llx] (%luMB) mapped at [%p-%p] ", |
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(unsigned long long)io_tlb_start, |
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(unsigned long long)io_tlb_end, |
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bytes >> 20, vstart, vend - 1); |
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} |
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int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) |
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{ |
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void *v_overflow_buffer; |
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unsigned long i, bytes; |
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|
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bytes = nslabs << IO_TLB_SHIFT; |
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|
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io_tlb_nslabs = nslabs; |
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io_tlb_start = __pa(tlb); io_tlb_end = io_tlb_start + bytes; |
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/* |
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* Get the overflow emergency buffer */ |
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v_overflow_buffer = memblock_virt_alloc_low_nopanic( |
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PAGE_ALIGN(io_tlb_overflow), PAGE_SIZE); |
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if (!v_overflow_buffer) |
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return -ENOMEM; |
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io_tlb_overflow_buffer = __pa(v_overflow_buffer); /* |
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* Allocate and initialize the free list array. This array is used * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE * between io_tlb_start and io_tlb_end. */ |
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io_tlb_list = memblock_virt_alloc( PAGE_ALIGN(io_tlb_nslabs * sizeof(int)), PAGE_SIZE); |
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for (i = 0; i < io_tlb_nslabs; i++) |
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io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); io_tlb_index = 0; |
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io_tlb_orig_addr = memblock_virt_alloc( PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)), PAGE_SIZE); |
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|
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if (verbose) swiotlb_print_info(); |
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return 0; |
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} |
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/* * Statically reserve bounce buffer space and initialize bounce buffer data * structures for the software IO TLB used to implement the DMA API. */ |
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void __init swiotlb_init(int verbose) |
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{ |
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size_t default_size = IO_TLB_DEFAULT_SIZE; |
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unsigned char *vstart; |
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unsigned long bytes; if (!io_tlb_nslabs) { io_tlb_nslabs = (default_size >> IO_TLB_SHIFT); io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); } bytes = io_tlb_nslabs << IO_TLB_SHIFT; |
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/* Get IO TLB memory from the low pages */ |
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vstart = memblock_virt_alloc_low_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE); |
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if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose)) return; |
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|
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if (io_tlb_start) |
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memblock_free_early(io_tlb_start, PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); |
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pr_warn("Cannot allocate SWIOTLB buffer"); no_iotlb_memory = true; |
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} |
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/* * Systems with larger DMA zones (those that don't support ISA) can * initialize the swiotlb later using the slab allocator if needed. * This should be just like above, but with some error catching. */ int |
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swiotlb_late_init_with_default_size(size_t default_size) |
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{ |
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unsigned long bytes, req_nslabs = io_tlb_nslabs; |
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unsigned char *vstart = NULL; |
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unsigned int order; |
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int rc = 0; |
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if (!io_tlb_nslabs) { io_tlb_nslabs = (default_size >> IO_TLB_SHIFT); io_tlb_nslabs = ALIGN(io_tlb_nslabs, IO_TLB_SEGSIZE); } /* * Get IO TLB memory from the low pages */ |
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order = get_order(io_tlb_nslabs << IO_TLB_SHIFT); |
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io_tlb_nslabs = SLABS_PER_PAGE << order; |
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bytes = io_tlb_nslabs << IO_TLB_SHIFT; |
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while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) { |
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vstart = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order); if (vstart) |
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break; order--; } |
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if (!vstart) { |
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io_tlb_nslabs = req_nslabs; return -ENOMEM; } |
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if (order != get_order(bytes)) { |
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printk(KERN_WARNING "Warning: only able to allocate %ld MB " "for software IO TLB ", (PAGE_SIZE << order) >> 20); io_tlb_nslabs = SLABS_PER_PAGE << order; } |
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rc = swiotlb_late_init_with_tbl(vstart, io_tlb_nslabs); |
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if (rc) |
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free_pages((unsigned long)vstart, order); |
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return rc; } int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) { unsigned long i, bytes; |
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unsigned char *v_overflow_buffer; |
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bytes = nslabs << IO_TLB_SHIFT; io_tlb_nslabs = nslabs; |
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io_tlb_start = virt_to_phys(tlb); io_tlb_end = io_tlb_start + bytes; |
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|
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memset(tlb, 0, bytes); |
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/* |
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* Get the overflow emergency buffer */ v_overflow_buffer = (void *)__get_free_pages(GFP_DMA, get_order(io_tlb_overflow)); if (!v_overflow_buffer) goto cleanup2; io_tlb_overflow_buffer = virt_to_phys(v_overflow_buffer); /* |
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* Allocate and initialize the free list array. This array is used * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE * between io_tlb_start and io_tlb_end. */ io_tlb_list = (unsigned int *)__get_free_pages(GFP_KERNEL, get_order(io_tlb_nslabs * sizeof(int))); if (!io_tlb_list) |
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goto cleanup3; |
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for (i = 0; i < io_tlb_nslabs; i++) io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); io_tlb_index = 0; |
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io_tlb_orig_addr = (phys_addr_t *) __get_free_pages(GFP_KERNEL, get_order(io_tlb_nslabs * sizeof(phys_addr_t))); |
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if (!io_tlb_orig_addr) |
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goto cleanup4; |
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|
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memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(phys_addr_t)); |
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|
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swiotlb_print_info(); |
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|
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late_alloc = 1; |
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return 0; cleanup4: |
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free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * sizeof(int))); |
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io_tlb_list = NULL; |
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cleanup3: free_pages((unsigned long)v_overflow_buffer, get_order(io_tlb_overflow)); io_tlb_overflow_buffer = 0; |
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cleanup2: |
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io_tlb_end = 0; |
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io_tlb_start = 0; |
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io_tlb_nslabs = 0; |
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return -ENOMEM; } |
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void __init swiotlb_free(void) { |
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if (!io_tlb_orig_addr) |
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return; if (late_alloc) { |
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free_pages((unsigned long)phys_to_virt(io_tlb_overflow_buffer), |
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get_order(io_tlb_overflow)); free_pages((unsigned long)io_tlb_orig_addr, get_order(io_tlb_nslabs * sizeof(phys_addr_t))); free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * sizeof(int))); |
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free_pages((unsigned long)phys_to_virt(io_tlb_start), |
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get_order(io_tlb_nslabs << IO_TLB_SHIFT)); } else { |
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memblock_free_late(io_tlb_overflow_buffer, PAGE_ALIGN(io_tlb_overflow)); memblock_free_late(__pa(io_tlb_orig_addr), PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t))); memblock_free_late(__pa(io_tlb_list), PAGE_ALIGN(io_tlb_nslabs * sizeof(int))); memblock_free_late(io_tlb_start, PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); |
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} |
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io_tlb_nslabs = 0; |
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} |
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static int is_swiotlb_buffer(phys_addr_t paddr) |
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{ |
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return paddr >= io_tlb_start && paddr < io_tlb_end; |
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} |
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/* |
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* Bounce: copy the swiotlb buffer back to the original dma location */ |
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static void swiotlb_bounce(phys_addr_t orig_addr, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir) |
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{ |
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unsigned long pfn = PFN_DOWN(orig_addr); unsigned char *vaddr = phys_to_virt(tlb_addr); |
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if (PageHighMem(pfn_to_page(pfn))) { /* The buffer does not have a mapping. Map it in and copy */ |
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unsigned int offset = orig_addr & ~PAGE_MASK; |
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char *buffer; unsigned int sz = 0; unsigned long flags; while (size) { |
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sz = min_t(size_t, PAGE_SIZE - offset, size); |
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382 383 |
local_irq_save(flags); |
c3eede8e0 lib: remove the s... |
384 |
buffer = kmap_atomic(pfn_to_page(pfn)); |
fb05a3792 swiotlb: add supp... |
385 |
if (dir == DMA_TO_DEVICE) |
af51a9f18 swiotlb: Do not e... |
386 |
memcpy(vaddr, buffer + offset, sz); |
ef9b18935 swiotlb: support ... |
387 |
else |
af51a9f18 swiotlb: Do not e... |
388 |
memcpy(buffer + offset, vaddr, sz); |
c3eede8e0 lib: remove the s... |
389 |
kunmap_atomic(buffer); |
ef9b18935 swiotlb: support ... |
390 |
local_irq_restore(flags); |
fb05a3792 swiotlb: add supp... |
391 392 393 |
size -= sz; pfn++; |
af51a9f18 swiotlb: Do not e... |
394 |
vaddr += sz; |
fb05a3792 swiotlb: add supp... |
395 |
offset = 0; |
ef9b18935 swiotlb: support ... |
396 |
} |
af51a9f18 swiotlb: Do not e... |
397 398 |
} else if (dir == DMA_TO_DEVICE) { memcpy(vaddr, phys_to_virt(orig_addr), size); |
ef9b18935 swiotlb: support ... |
399 |
} else { |
af51a9f18 swiotlb: Do not e... |
400 |
memcpy(phys_to_virt(orig_addr), vaddr, size); |
ef9b18935 swiotlb: support ... |
401 |
} |
1b548f667 swiotlb: factor o... |
402 |
} |
e05ed4d1f swiotlb: Return p... |
403 404 405 406 |
phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr, phys_addr_t orig_addr, size_t size, enum dma_data_direction dir) |
1da177e4c Linux-2.6.12-rc2 |
407 408 |
{ unsigned long flags; |
e05ed4d1f swiotlb: Return p... |
409 |
phys_addr_t tlb_addr; |
1da177e4c Linux-2.6.12-rc2 |
410 411 |
unsigned int nslots, stride, index, wrap; int i; |
681cc5cd3 iommu sg merging:... |
412 413 414 |
unsigned long mask; unsigned long offset_slots; unsigned long max_slots; |
ac2cbab21 x86: Don't panic ... |
415 416 |
if (no_iotlb_memory) panic("Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer"); |
681cc5cd3 iommu sg merging:... |
417 |
mask = dma_get_seg_boundary(hwdev); |
681cc5cd3 iommu sg merging:... |
418 |
|
eb605a575 swiotlb: add swio... |
419 420 421 |
tbl_dma_addr &= mask; offset_slots = ALIGN(tbl_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; |
a5ddde4a5 swiotlb: add comm... |
422 423 424 425 |
/* * Carefully handle integer overflow which can occur when mask == ~0UL. */ |
b15a3891c avoid endless loo... |
426 427 428 |
max_slots = mask + 1 ? ALIGN(mask + 1, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT : 1UL << (BITS_PER_LONG - IO_TLB_SHIFT); |
1da177e4c Linux-2.6.12-rc2 |
429 430 431 432 433 434 435 436 437 438 |
/* * For mappings greater than a page, we limit the stride (and * hence alignment) to a page size. */ nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; if (size > PAGE_SIZE) stride = (1 << (PAGE_SHIFT - IO_TLB_SHIFT)); else stride = 1; |
348145458 BUG_ON() Conversi... |
439 |
BUG_ON(!nslots); |
1da177e4c Linux-2.6.12-rc2 |
440 441 442 443 444 445 |
/* * Find suitable number of IO TLB entries size that will fit this * request and allocate a buffer from that IO TLB pool. */ spin_lock_irqsave(&io_tlb_lock, flags); |
a7133a155 lib/swiotlb.c: cl... |
446 447 448 449 450 451 |
index = ALIGN(io_tlb_index, stride); if (index >= io_tlb_nslabs) index = 0; wrap = index; do { |
a85225092 swiotlb: use iomm... |
452 453 |
while (iommu_is_span_boundary(index, nslots, offset_slots, max_slots)) { |
b15a3891c avoid endless loo... |
454 455 456 |
index += stride; if (index >= io_tlb_nslabs) index = 0; |
a7133a155 lib/swiotlb.c: cl... |
457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 |
if (index == wrap) goto not_found; } /* * 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; |
e05ed4d1f swiotlb: Return p... |
473 |
tlb_addr = io_tlb_start + (index << IO_TLB_SHIFT); |
1da177e4c Linux-2.6.12-rc2 |
474 |
|
a7133a155 lib/swiotlb.c: cl... |
475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 |
/* * 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); not_found: spin_unlock_irqrestore(&io_tlb_lock, flags); |
0cb637bff swiotlb: Don't Do... |
491 492 493 |
if (printk_ratelimit()) dev_warn(hwdev, "swiotlb buffer is full (sz: %zd bytes) ", size); |
e05ed4d1f swiotlb: Return p... |
494 |
return SWIOTLB_MAP_ERROR; |
a7133a155 lib/swiotlb.c: cl... |
495 |
found: |
1da177e4c Linux-2.6.12-rc2 |
496 497 498 499 500 501 502 |
spin_unlock_irqrestore(&io_tlb_lock, flags); /* * Save away the mapping from the original address to the DMA address. * This is needed when we sync the memory. Then we sync the buffer if * needed. */ |
bc40ac669 swiotlb: store ph... |
503 |
for (i = 0; i < nslots; i++) |
e05ed4d1f swiotlb: Return p... |
504 |
io_tlb_orig_addr[index+i] = orig_addr + (i << IO_TLB_SHIFT); |
1da177e4c Linux-2.6.12-rc2 |
505 |
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) |
af51a9f18 swiotlb: Do not e... |
506 |
swiotlb_bounce(orig_addr, tlb_addr, size, DMA_TO_DEVICE); |
1da177e4c Linux-2.6.12-rc2 |
507 |
|
e05ed4d1f swiotlb: Return p... |
508 |
return tlb_addr; |
1da177e4c Linux-2.6.12-rc2 |
509 |
} |
d7ef1533a swiotlb: Make swi... |
510 |
EXPORT_SYMBOL_GPL(swiotlb_tbl_map_single); |
1da177e4c Linux-2.6.12-rc2 |
511 512 |
/* |
eb605a575 swiotlb: add swio... |
513 514 |
* Allocates bounce buffer and returns its kernel virtual address. */ |
e05ed4d1f swiotlb: Return p... |
515 516 |
phys_addr_t map_single(struct device *hwdev, phys_addr_t phys, size_t size, enum dma_data_direction dir) |
eb605a575 swiotlb: add swio... |
517 |
{ |
ff7204a74 swiotlb: Make io_... |
518 |
dma_addr_t start_dma_addr = phys_to_dma(hwdev, io_tlb_start); |
eb605a575 swiotlb: add swio... |
519 520 521 522 523 |
return swiotlb_tbl_map_single(hwdev, start_dma_addr, phys, size, dir); } /* |
1da177e4c Linux-2.6.12-rc2 |
524 525 |
* dma_addr is the kernel virtual address of the bounce buffer to unmap. */ |
61ca08c32 swiotlb: Use phys... |
526 527 |
void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir) |
1da177e4c Linux-2.6.12-rc2 |
528 529 530 |
{ unsigned long flags; int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; |
61ca08c32 swiotlb: Use phys... |
531 532 |
int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT; phys_addr_t orig_addr = io_tlb_orig_addr[index]; |
1da177e4c Linux-2.6.12-rc2 |
533 534 535 536 |
/* * First, sync the memory before unmapping the entry */ |
af51a9f18 swiotlb: Do not e... |
537 538 |
if (orig_addr && ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL))) swiotlb_bounce(orig_addr, tlb_addr, size, DMA_FROM_DEVICE); |
1da177e4c Linux-2.6.12-rc2 |
539 540 541 |
/* * Return the buffer to the free list by setting the corresponding |
af901ca18 tree-wide: fix as... |
542 |
* entries to indicate the number of contiguous entries available. |
1da177e4c Linux-2.6.12-rc2 |
543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 |
* While returning the entries to the free list, we merge the entries * with slots below and above the pool being returned. */ spin_lock_irqsave(&io_tlb_lock, flags); { count = ((index + nslots) < ALIGN(index + 1, IO_TLB_SEGSIZE) ? io_tlb_list[index + nslots] : 0); /* * Step 1: return the slots to the free list, merging the * slots with superceeding slots */ for (i = index + nslots - 1; i >= index; i--) io_tlb_list[i] = ++count; /* * Step 2: merge the returned slots with the preceding slots, * if available (non zero) */ for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE -1) && io_tlb_list[i]; i--) io_tlb_list[i] = ++count; } spin_unlock_irqrestore(&io_tlb_lock, flags); } |
d7ef1533a swiotlb: Make swi... |
565 |
EXPORT_SYMBOL_GPL(swiotlb_tbl_unmap_single); |
1da177e4c Linux-2.6.12-rc2 |
566 |
|
fbfda893e swiotlb: Use phys... |
567 568 569 |
void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir, enum dma_sync_target target) |
1da177e4c Linux-2.6.12-rc2 |
570 |
{ |
fbfda893e swiotlb: Use phys... |
571 572 |
int index = (tlb_addr - io_tlb_start) >> IO_TLB_SHIFT; phys_addr_t orig_addr = io_tlb_orig_addr[index]; |
bc40ac669 swiotlb: store ph... |
573 |
|
fbfda893e swiotlb: Use phys... |
574 |
orig_addr += (unsigned long)tlb_addr & ((1 << IO_TLB_SHIFT) - 1); |
df336d1c7 Fix swiotlb_sync_... |
575 |
|
de69e0f0b [PATCH] swiotlb: ... |
576 577 578 |
switch (target) { case SYNC_FOR_CPU: if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) |
af51a9f18 swiotlb: Do not e... |
579 |
swiotlb_bounce(orig_addr, tlb_addr, |
fbfda893e swiotlb: Use phys... |
580 |
size, DMA_FROM_DEVICE); |
348145458 BUG_ON() Conversi... |
581 582 |
else BUG_ON(dir != DMA_TO_DEVICE); |
de69e0f0b [PATCH] swiotlb: ... |
583 584 585 |
break; case SYNC_FOR_DEVICE: if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)) |
af51a9f18 swiotlb: Do not e... |
586 |
swiotlb_bounce(orig_addr, tlb_addr, |
fbfda893e swiotlb: Use phys... |
587 |
size, DMA_TO_DEVICE); |
348145458 BUG_ON() Conversi... |
588 589 |
else BUG_ON(dir != DMA_FROM_DEVICE); |
de69e0f0b [PATCH] swiotlb: ... |
590 591 |
break; default: |
1da177e4c Linux-2.6.12-rc2 |
592 |
BUG(); |
de69e0f0b [PATCH] swiotlb: ... |
593 |
} |
1da177e4c Linux-2.6.12-rc2 |
594 |
} |
d7ef1533a swiotlb: Make swi... |
595 |
EXPORT_SYMBOL_GPL(swiotlb_tbl_sync_single); |
1da177e4c Linux-2.6.12-rc2 |
596 597 598 |
void * swiotlb_alloc_coherent(struct device *hwdev, size_t size, |
06a544971 [PATCH] gfp_t: dm... |
599 |
dma_addr_t *dma_handle, gfp_t flags) |
1da177e4c Linux-2.6.12-rc2 |
600 |
{ |
563aaf064 [IA64] swiotlb cl... |
601 |
dma_addr_t dev_addr; |
1da177e4c Linux-2.6.12-rc2 |
602 603 |
void *ret; int order = get_order(size); |
284901a90 dma-mapping: repl... |
604 |
u64 dma_mask = DMA_BIT_MASK(32); |
1e74f3000 swiotlb: use cohe... |
605 606 607 |
if (hwdev && hwdev->coherent_dma_mask) dma_mask = hwdev->coherent_dma_mask; |
1da177e4c Linux-2.6.12-rc2 |
608 |
|
25667d675 Revert "[IA64] sw... |
609 |
ret = (void *)__get_free_pages(flags, order); |
e05ed4d1f swiotlb: Return p... |
610 611 612 613 614 615 616 617 618 |
if (ret) { dev_addr = swiotlb_virt_to_bus(hwdev, ret); if (dev_addr + size - 1 > dma_mask) { /* * The allocated memory isn't reachable by the device. */ free_pages((unsigned long) ret, order); ret = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
619 620 621 |
} if (!ret) { /* |
bfc5501f6 swiotlb: Make int... |
622 623 |
* We are either out of memory or the device can't DMA to * GFP_DMA memory; fall back on map_single(), which |
ceb5ac326 swiotlb: comment ... |
624 |
* will grab memory from the lowest available address range. |
1da177e4c Linux-2.6.12-rc2 |
625 |
*/ |
e05ed4d1f swiotlb: Return p... |
626 627 |
phys_addr_t paddr = map_single(hwdev, 0, size, DMA_FROM_DEVICE); if (paddr == SWIOTLB_MAP_ERROR) |
1da177e4c Linux-2.6.12-rc2 |
628 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
629 |
|
e05ed4d1f swiotlb: Return p... |
630 631 |
ret = phys_to_virt(paddr); dev_addr = phys_to_dma(hwdev, paddr); |
1da177e4c Linux-2.6.12-rc2 |
632 |
|
61ca08c32 swiotlb: Use phys... |
633 634 635 636 637 638 |
/* Confirm address can be DMA'd by device */ if (dev_addr + size - 1 > dma_mask) { printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx ", (unsigned long long)dma_mask, (unsigned long long)dev_addr); |
a2b89b596 swiotlb: remove p... |
639 |
|
61ca08c32 swiotlb: Use phys... |
640 641 642 643 644 |
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */ swiotlb_tbl_unmap_single(hwdev, paddr, size, DMA_TO_DEVICE); return NULL; } |
1da177e4c Linux-2.6.12-rc2 |
645 |
} |
e05ed4d1f swiotlb: Return p... |
646 |
|
1da177e4c Linux-2.6.12-rc2 |
647 |
*dma_handle = dev_addr; |
e05ed4d1f swiotlb: Return p... |
648 |
memset(ret, 0, size); |
1da177e4c Linux-2.6.12-rc2 |
649 650 |
return ret; } |
874d6a955 swiotlb: clean up... |
651 |
EXPORT_SYMBOL(swiotlb_alloc_coherent); |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 |
void swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, |
02ca646e7 swiotlb: remove u... |
655 |
dma_addr_t dev_addr) |
1da177e4c Linux-2.6.12-rc2 |
656 |
{ |
862d196b2 swiotlb: use phys... |
657 |
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr); |
02ca646e7 swiotlb: remove u... |
658 |
|
aa24886e3 dma_free_coherent... |
659 |
WARN_ON(irqs_disabled()); |
02ca646e7 swiotlb: remove u... |
660 661 |
if (!is_swiotlb_buffer(paddr)) free_pages((unsigned long)vaddr, get_order(size)); |
1da177e4c Linux-2.6.12-rc2 |
662 |
else |
bfc5501f6 swiotlb: Make int... |
663 |
/* DMA_TO_DEVICE to avoid memcpy in swiotlb_tbl_unmap_single */ |
61ca08c32 swiotlb: Use phys... |
664 |
swiotlb_tbl_unmap_single(hwdev, paddr, size, DMA_TO_DEVICE); |
1da177e4c Linux-2.6.12-rc2 |
665 |
} |
874d6a955 swiotlb: clean up... |
666 |
EXPORT_SYMBOL(swiotlb_free_coherent); |
1da177e4c Linux-2.6.12-rc2 |
667 668 |
static void |
22d482699 swiotlb: search a... |
669 670 |
swiotlb_full(struct device *dev, size_t size, enum dma_data_direction dir, int do_panic) |
1da177e4c Linux-2.6.12-rc2 |
671 672 673 674 |
{ /* * Ran out of IOMMU space for this operation. This is very bad. * Unfortunately the drivers cannot handle this operation properly. |
17e5ad6c0 [PATCH] Removed r... |
675 |
* unless they check for dma_mapping_error (most don't) |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 |
* When the mapping is small enough return a static buffer to limit * the damage, or panic when the transfer is too big. */ |
563aaf064 [IA64] swiotlb cl... |
679 |
printk(KERN_ERR "DMA: Out of SW-IOMMU space for %zu bytes at " |
94b324864 swiotlb: struct d... |
680 681 |
"device %s ", size, dev ? dev_name(dev) : "?"); |
1da177e4c Linux-2.6.12-rc2 |
682 |
|
c7084b35e lib/swiotlb.c: Fi... |
683 684 685 686 687 688 689 690 691 692 693 694 |
if (size <= io_tlb_overflow || !do_panic) return; if (dir == DMA_BIDIRECTIONAL) panic("DMA: Random memory could be DMA accessed "); if (dir == DMA_FROM_DEVICE) panic("DMA: Random memory could be DMA written "); if (dir == DMA_TO_DEVICE) panic("DMA: Random memory could be DMA read "); |
1da177e4c Linux-2.6.12-rc2 |
695 696 697 698 |
} /* * Map a single buffer of the indicated size for DMA in streaming mode. The |
17e5ad6c0 [PATCH] Removed r... |
699 |
* physical address to use is returned. |
1da177e4c Linux-2.6.12-rc2 |
700 701 |
* * Once the device is given the dma address, the device owns this memory until |
ceb5ac326 swiotlb: comment ... |
702 |
* either swiotlb_unmap_page or swiotlb_dma_sync_single is performed. |
1da177e4c Linux-2.6.12-rc2 |
703 |
*/ |
f98eee8ea x86, ia64: remove... |
704 705 706 707 |
dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) |
1da177e4c Linux-2.6.12-rc2 |
708 |
{ |
e05ed4d1f swiotlb: Return p... |
709 |
phys_addr_t map, phys = page_to_phys(page) + offset; |
862d196b2 swiotlb: use phys... |
710 |
dma_addr_t dev_addr = phys_to_dma(dev, phys); |
1da177e4c Linux-2.6.12-rc2 |
711 |
|
348145458 BUG_ON() Conversi... |
712 |
BUG_ON(dir == DMA_NONE); |
1da177e4c Linux-2.6.12-rc2 |
713 |
/* |
ceb5ac326 swiotlb: comment ... |
714 |
* If the address happens to be in the device's DMA window, |
1da177e4c Linux-2.6.12-rc2 |
715 716 717 |
* we can safely return the device addr and not worry about bounce * buffering it. */ |
b9394647a swiotlb: use dma_... |
718 |
if (dma_capable(dev, dev_addr, size) && !swiotlb_force) |
1da177e4c Linux-2.6.12-rc2 |
719 |
return dev_addr; |
2b2b614dd tracing/events: A... |
720 |
trace_swiotlb_bounced(dev, dev_addr, size, swiotlb_force); |
e05ed4d1f swiotlb: Return p... |
721 |
/* Oh well, have to allocate and map a bounce buffer. */ |
f98eee8ea x86, ia64: remove... |
722 |
map = map_single(dev, phys, size, dir); |
e05ed4d1f swiotlb: Return p... |
723 |
if (map == SWIOTLB_MAP_ERROR) { |
f98eee8ea x86, ia64: remove... |
724 |
swiotlb_full(dev, size, dir, 1); |
ee3f6ba89 swiotlb: Make io_... |
725 |
return phys_to_dma(dev, io_tlb_overflow_buffer); |
1da177e4c Linux-2.6.12-rc2 |
726 |
} |
e05ed4d1f swiotlb: Return p... |
727 |
dev_addr = phys_to_dma(dev, map); |
1da177e4c Linux-2.6.12-rc2 |
728 |
|
e05ed4d1f swiotlb: Return p... |
729 |
/* Ensure that the address returned is DMA'ble */ |
fba99fa38 swiotlb: fix wron... |
730 |
if (!dma_capable(dev, dev_addr, size)) { |
61ca08c32 swiotlb: Use phys... |
731 |
swiotlb_tbl_unmap_single(dev, map, size, dir); |
ee3f6ba89 swiotlb: Make io_... |
732 |
return phys_to_dma(dev, io_tlb_overflow_buffer); |
fba99fa38 swiotlb: fix wron... |
733 |
} |
1da177e4c Linux-2.6.12-rc2 |
734 735 736 |
return dev_addr; } |
f98eee8ea x86, ia64: remove... |
737 |
EXPORT_SYMBOL_GPL(swiotlb_map_page); |
1da177e4c Linux-2.6.12-rc2 |
738 739 |
/* |
1da177e4c Linux-2.6.12-rc2 |
740 |
* Unmap a single streaming mode DMA translation. The dma_addr and size must |
ceb5ac326 swiotlb: comment ... |
741 |
* match what was provided for in a previous swiotlb_map_page call. All |
1da177e4c Linux-2.6.12-rc2 |
742 743 744 745 746 |
* other usages are undefined. * * After this call, reads by the cpu to the buffer are guaranteed to see * whatever the device wrote there. */ |
7fcebbd2d swiotlb: rename u... |
747 |
static void unmap_single(struct device *hwdev, dma_addr_t dev_addr, |
22d482699 swiotlb: search a... |
748 |
size_t size, enum dma_data_direction dir) |
1da177e4c Linux-2.6.12-rc2 |
749 |
{ |
862d196b2 swiotlb: use phys... |
750 |
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr); |
1da177e4c Linux-2.6.12-rc2 |
751 |
|
348145458 BUG_ON() Conversi... |
752 |
BUG_ON(dir == DMA_NONE); |
7fcebbd2d swiotlb: rename u... |
753 |
|
02ca646e7 swiotlb: remove u... |
754 |
if (is_swiotlb_buffer(paddr)) { |
61ca08c32 swiotlb: Use phys... |
755 |
swiotlb_tbl_unmap_single(hwdev, paddr, size, dir); |
7fcebbd2d swiotlb: rename u... |
756 757 758 759 760 |
return; } if (dir != DMA_FROM_DEVICE) return; |
02ca646e7 swiotlb: remove u... |
761 762 763 764 765 766 767 |
/* * phys_to_virt doesn't work with hihgmem page but we could * call dma_mark_clean() with hihgmem page here. However, we * are fine since dma_mark_clean() is null on POWERPC. We can * make dma_mark_clean() take a physical address if necessary. */ dma_mark_clean(phys_to_virt(paddr), size); |
7fcebbd2d swiotlb: rename u... |
768 769 770 771 772 773 774 |
} void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { unmap_single(hwdev, dev_addr, size, dir); |
1da177e4c Linux-2.6.12-rc2 |
775 |
} |
f98eee8ea x86, ia64: remove... |
776 |
EXPORT_SYMBOL_GPL(swiotlb_unmap_page); |
874d6a955 swiotlb: clean up... |
777 |
|
1da177e4c Linux-2.6.12-rc2 |
778 779 780 781 |
/* * Make physical memory consistent for a single streaming mode DMA translation * after a transfer. * |
ceb5ac326 swiotlb: comment ... |
782 |
* If you perform a swiotlb_map_page() but wish to interrogate the buffer |
17e5ad6c0 [PATCH] Removed r... |
783 784 |
* using the cpu, yet do not wish to teardown the dma mapping, you must * call this function before doing so. At the next point you give the dma |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 |
* address back to the card, you must first perform a * swiotlb_dma_sync_for_device, and then the device again owns the buffer */ |
be6b02678 [PATCH] swiotlb u... |
788 |
static void |
8270f3f1a [PATCH] swiotlb: ... |
789 |
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, |
d7ef1533a swiotlb: Make swi... |
790 791 |
size_t size, enum dma_data_direction dir, enum dma_sync_target target) |
1da177e4c Linux-2.6.12-rc2 |
792 |
{ |
862d196b2 swiotlb: use phys... |
793 |
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr); |
1da177e4c Linux-2.6.12-rc2 |
794 |
|
348145458 BUG_ON() Conversi... |
795 |
BUG_ON(dir == DMA_NONE); |
380d68783 swiotlb: use swio... |
796 |
|
02ca646e7 swiotlb: remove u... |
797 |
if (is_swiotlb_buffer(paddr)) { |
fbfda893e swiotlb: Use phys... |
798 |
swiotlb_tbl_sync_single(hwdev, paddr, size, dir, target); |
380d68783 swiotlb: use swio... |
799 800 801 802 803 |
return; } if (dir != DMA_FROM_DEVICE) return; |
02ca646e7 swiotlb: remove u... |
804 |
dma_mark_clean(phys_to_virt(paddr), size); |
1da177e4c Linux-2.6.12-rc2 |
805 806 807 |
} void |
8270f3f1a [PATCH] swiotlb: ... |
808 |
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, |
160c1d8e4 x86, ia64: conver... |
809 |
size_t size, enum dma_data_direction dir) |
8270f3f1a [PATCH] swiotlb: ... |
810 |
{ |
de69e0f0b [PATCH] swiotlb: ... |
811 |
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU); |
8270f3f1a [PATCH] swiotlb: ... |
812 |
} |
874d6a955 swiotlb: clean up... |
813 |
EXPORT_SYMBOL(swiotlb_sync_single_for_cpu); |
8270f3f1a [PATCH] swiotlb: ... |
814 815 |
void |
1da177e4c Linux-2.6.12-rc2 |
816 |
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, |
160c1d8e4 x86, ia64: conver... |
817 |
size_t size, enum dma_data_direction dir) |
1da177e4c Linux-2.6.12-rc2 |
818 |
{ |
de69e0f0b [PATCH] swiotlb: ... |
819 |
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE); |
1da177e4c Linux-2.6.12-rc2 |
820 |
} |
874d6a955 swiotlb: clean up... |
821 |
EXPORT_SYMBOL(swiotlb_sync_single_for_device); |
1da177e4c Linux-2.6.12-rc2 |
822 823 824 |
/* * Map a set of buffers described by scatterlist in streaming mode for DMA. |
ceb5ac326 swiotlb: comment ... |
825 |
* This is the scatter-gather version of the above swiotlb_map_page |
1da177e4c Linux-2.6.12-rc2 |
826 827 828 829 830 831 832 833 834 835 |
* interface. Here the scatter gather list elements are each tagged with the * appropriate dma address and length. They are obtained via * sg_dma_{address,length}(SG). * * NOTE: An implementation may be able to use a smaller number of * DMA address/length pairs than there are SG table elements. * (for example via virtual mapping capabilities) * The routine returns the number of addr/length pairs actually * used, at most nents. * |
ceb5ac326 swiotlb: comment ... |
836 |
* Device ownership issues as mentioned above for swiotlb_map_page are the |
1da177e4c Linux-2.6.12-rc2 |
837 838 839 |
* same here. */ int |
309df0c50 dma/ia64: update ... |
840 |
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, |
160c1d8e4 x86, ia64: conver... |
841 |
enum dma_data_direction dir, struct dma_attrs *attrs) |
1da177e4c Linux-2.6.12-rc2 |
842 |
{ |
dbfd49fe9 swiotlb: sg chain... |
843 |
struct scatterlist *sg; |
1da177e4c Linux-2.6.12-rc2 |
844 |
int i; |
348145458 BUG_ON() Conversi... |
845 |
BUG_ON(dir == DMA_NONE); |
1da177e4c Linux-2.6.12-rc2 |
846 |
|
dbfd49fe9 swiotlb: sg chain... |
847 |
for_each_sg(sgl, sg, nelems, i) { |
961d7d0ee swiotlb: do not u... |
848 |
phys_addr_t paddr = sg_phys(sg); |
862d196b2 swiotlb: use phys... |
849 |
dma_addr_t dev_addr = phys_to_dma(hwdev, paddr); |
bc40ac669 swiotlb: store ph... |
850 |
|
cf56e3f2e swiotlb: remove s... |
851 |
if (swiotlb_force || |
b9394647a swiotlb: use dma_... |
852 |
!dma_capable(hwdev, dev_addr, sg->length)) { |
e05ed4d1f swiotlb: Return p... |
853 854 855 |
phys_addr_t map = map_single(hwdev, sg_phys(sg), sg->length, dir); if (map == SWIOTLB_MAP_ERROR) { |
1da177e4c Linux-2.6.12-rc2 |
856 857 858 |
/* Don't panic here, we expect map_sg users to do proper error handling. */ swiotlb_full(hwdev, sg->length, dir, 0); |
309df0c50 dma/ia64: update ... |
859 860 |
swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir, attrs); |
4d86ec7a8 swiotlb: replace ... |
861 |
sg_dma_len(sgl) = 0; |
1da177e4c Linux-2.6.12-rc2 |
862 863 |
return 0; } |
e05ed4d1f swiotlb: Return p... |
864 |
sg->dma_address = phys_to_dma(hwdev, map); |
1da177e4c Linux-2.6.12-rc2 |
865 866 |
} else sg->dma_address = dev_addr; |
4d86ec7a8 swiotlb: replace ... |
867 |
sg_dma_len(sg) = sg->length; |
1da177e4c Linux-2.6.12-rc2 |
868 869 870 |
} return nelems; } |
309df0c50 dma/ia64: update ... |
871 872 873 874 |
EXPORT_SYMBOL(swiotlb_map_sg_attrs); int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems, |
22d482699 swiotlb: search a... |
875 |
enum dma_data_direction dir) |
309df0c50 dma/ia64: update ... |
876 877 878 |
{ return swiotlb_map_sg_attrs(hwdev, sgl, nelems, dir, NULL); } |
874d6a955 swiotlb: clean up... |
879 |
EXPORT_SYMBOL(swiotlb_map_sg); |
1da177e4c Linux-2.6.12-rc2 |
880 881 882 |
/* * Unmap a set of streaming mode DMA translations. Again, cpu read rules |
ceb5ac326 swiotlb: comment ... |
883 |
* concerning calls here are the same as for swiotlb_unmap_page() above. |
1da177e4c Linux-2.6.12-rc2 |
884 885 |
*/ void |
309df0c50 dma/ia64: update ... |
886 |
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, |
160c1d8e4 x86, ia64: conver... |
887 |
int nelems, enum dma_data_direction dir, struct dma_attrs *attrs) |
1da177e4c Linux-2.6.12-rc2 |
888 |
{ |
dbfd49fe9 swiotlb: sg chain... |
889 |
struct scatterlist *sg; |
1da177e4c Linux-2.6.12-rc2 |
890 |
int i; |
348145458 BUG_ON() Conversi... |
891 |
BUG_ON(dir == DMA_NONE); |
1da177e4c Linux-2.6.12-rc2 |
892 |
|
7fcebbd2d swiotlb: rename u... |
893 |
for_each_sg(sgl, sg, nelems, i) |
4d86ec7a8 swiotlb: replace ... |
894 |
unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir); |
7fcebbd2d swiotlb: rename u... |
895 |
|
1da177e4c Linux-2.6.12-rc2 |
896 |
} |
309df0c50 dma/ia64: update ... |
897 898 899 900 |
EXPORT_SYMBOL(swiotlb_unmap_sg_attrs); void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems, |
22d482699 swiotlb: search a... |
901 |
enum dma_data_direction dir) |
309df0c50 dma/ia64: update ... |
902 903 904 |
{ return swiotlb_unmap_sg_attrs(hwdev, sgl, nelems, dir, NULL); } |
874d6a955 swiotlb: clean up... |
905 |
EXPORT_SYMBOL(swiotlb_unmap_sg); |
1da177e4c Linux-2.6.12-rc2 |
906 907 908 909 910 911 912 913 |
/* * Make physical memory consistent for a set of streaming mode DMA translations * after a transfer. * * The same as swiotlb_sync_single_* but for a scatter-gather list, same rules * and usage. */ |
be6b02678 [PATCH] swiotlb u... |
914 |
static void |
dbfd49fe9 swiotlb: sg chain... |
915 |
swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl, |
d7ef1533a swiotlb: Make swi... |
916 917 |
int nelems, enum dma_data_direction dir, enum dma_sync_target target) |
1da177e4c Linux-2.6.12-rc2 |
918 |
{ |
dbfd49fe9 swiotlb: sg chain... |
919 |
struct scatterlist *sg; |
1da177e4c Linux-2.6.12-rc2 |
920 |
int i; |
380d68783 swiotlb: use swio... |
921 922 |
for_each_sg(sgl, sg, nelems, i) swiotlb_sync_single(hwdev, sg->dma_address, |
4d86ec7a8 swiotlb: replace ... |
923 |
sg_dma_len(sg), dir, target); |
1da177e4c Linux-2.6.12-rc2 |
924 925 926 |
} void |
8270f3f1a [PATCH] swiotlb: ... |
927 |
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, |
160c1d8e4 x86, ia64: conver... |
928 |
int nelems, enum dma_data_direction dir) |
8270f3f1a [PATCH] swiotlb: ... |
929 |
{ |
de69e0f0b [PATCH] swiotlb: ... |
930 |
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU); |
8270f3f1a [PATCH] swiotlb: ... |
931 |
} |
874d6a955 swiotlb: clean up... |
932 |
EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu); |
8270f3f1a [PATCH] swiotlb: ... |
933 934 |
void |
1da177e4c Linux-2.6.12-rc2 |
935 |
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, |
160c1d8e4 x86, ia64: conver... |
936 |
int nelems, enum dma_data_direction dir) |
1da177e4c Linux-2.6.12-rc2 |
937 |
{ |
de69e0f0b [PATCH] swiotlb: ... |
938 |
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE); |
1da177e4c Linux-2.6.12-rc2 |
939 |
} |
874d6a955 swiotlb: clean up... |
940 |
EXPORT_SYMBOL(swiotlb_sync_sg_for_device); |
1da177e4c Linux-2.6.12-rc2 |
941 942 |
int |
8d8bb39b9 dma-mapping: add ... |
943 |
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr) |
1da177e4c Linux-2.6.12-rc2 |
944 |
{ |
ee3f6ba89 swiotlb: Make io_... |
945 |
return (dma_addr == phys_to_dma(hwdev, io_tlb_overflow_buffer)); |
1da177e4c Linux-2.6.12-rc2 |
946 |
} |
874d6a955 swiotlb: clean up... |
947 |
EXPORT_SYMBOL(swiotlb_dma_mapping_error); |
1da177e4c Linux-2.6.12-rc2 |
948 949 |
/* |
17e5ad6c0 [PATCH] Removed r... |
950 |
* Return whether the given device DMA address mask can be supported |
1da177e4c Linux-2.6.12-rc2 |
951 |
* properly. For example, if your device can only drive the low 24-bits |
17e5ad6c0 [PATCH] Removed r... |
952 |
* during bus mastering, then you would pass 0x00ffffff as the mask to |
1da177e4c Linux-2.6.12-rc2 |
953 954 955 |
* this function. */ int |
563aaf064 [IA64] swiotlb cl... |
956 |
swiotlb_dma_supported(struct device *hwdev, u64 mask) |
1da177e4c Linux-2.6.12-rc2 |
957 |
{ |
c40dba06e swiotlb: Make io_... |
958 |
return phys_to_dma(hwdev, io_tlb_end - 1) <= mask; |
1da177e4c Linux-2.6.12-rc2 |
959 |
} |
1da177e4c Linux-2.6.12-rc2 |
960 |
EXPORT_SYMBOL(swiotlb_dma_supported); |