Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 7 | * Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@linux-mips.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. |
| 9 | */ |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/types.h> |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 12 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/mm.h> |
| 14 | #include <linux/module.h> |
Jens Axboe | 4fcc47a | 2007-10-23 12:32:34 +0200 | [diff] [blame] | 15 | #include <linux/scatterlist.h> |
Ralf Baechle | 6e86b0b | 2007-10-29 19:35:33 +0000 | [diff] [blame] | 16 | #include <linux/string.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/gfp.h> |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 18 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | #include <asm/cache.h> |
| 21 | #include <asm/io.h> |
| 22 | |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 23 | #include <dma-coherence.h> |
| 24 | |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 25 | static inline struct page *dma_addr_to_page(struct device *dev, |
Kevin Cernekee | 3807ef3 | 2009-04-23 17:25:12 -0700 | [diff] [blame] | 26 | dma_addr_t dma_addr) |
Franck Bui-Huu | c9d0696 | 2007-03-19 17:36:42 +0100 | [diff] [blame] | 27 | { |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 28 | return pfn_to_page( |
| 29 | plat_dma_addr_to_phys(dev, dma_addr) >> PAGE_SHIFT); |
Franck Bui-Huu | c9d0696 | 2007-03-19 17:36:42 +0100 | [diff] [blame] | 30 | } |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | /* |
| 33 | * Warning on the terminology - Linux calls an uncached area coherent; |
| 34 | * MIPS terminology calls memory areas with hardware maintained coherency |
| 35 | * coherent. |
| 36 | */ |
| 37 | |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 38 | static inline int cpu_is_noncoherent_r10000(struct device *dev) |
| 39 | { |
| 40 | return !plat_device_is_coherent(dev) && |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 41 | (current_cpu_type() == CPU_R10000 || |
| 42 | current_cpu_type() == CPU_R12000); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 43 | } |
| 44 | |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 45 | static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp) |
| 46 | { |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 47 | gfp_t dma_flag; |
| 48 | |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 49 | /* ignore region specifiers */ |
| 50 | gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); |
| 51 | |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 52 | #ifdef CONFIG_ISA |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 53 | if (dev == NULL) |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 54 | dma_flag = __GFP_DMA; |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 55 | else |
| 56 | #endif |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 57 | #if defined(CONFIG_ZONE_DMA32) && defined(CONFIG_ZONE_DMA) |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 58 | if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 59 | dma_flag = __GFP_DMA; |
| 60 | else if (dev->coherent_dma_mask < DMA_BIT_MASK(64)) |
| 61 | dma_flag = __GFP_DMA32; |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 62 | else |
| 63 | #endif |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 64 | #if defined(CONFIG_ZONE_DMA32) && !defined(CONFIG_ZONE_DMA) |
| 65 | if (dev->coherent_dma_mask < DMA_BIT_MASK(64)) |
| 66 | dma_flag = __GFP_DMA32; |
| 67 | else |
| 68 | #endif |
| 69 | #if defined(CONFIG_ZONE_DMA) && !defined(CONFIG_ZONE_DMA32) |
| 70 | if (dev->coherent_dma_mask < DMA_BIT_MASK(64)) |
| 71 | dma_flag = __GFP_DMA; |
| 72 | else |
| 73 | #endif |
| 74 | dma_flag = 0; |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 75 | |
| 76 | /* Don't invoke OOM killer */ |
| 77 | gfp |= __GFP_NORETRY; |
| 78 | |
Ralf Baechle | a2e715a | 2010-09-02 23:22:23 +0200 | [diff] [blame] | 79 | return gfp | dma_flag; |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 80 | } |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | void *dma_alloc_noncoherent(struct device *dev, size_t size, |
Al Viro | 185a8ff | 2005-10-21 03:21:23 -0400 | [diff] [blame] | 83 | dma_addr_t * dma_handle, gfp_t gfp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
| 85 | void *ret; |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 86 | |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 87 | gfp = massage_gfp_flags(dev, gfp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | ret = (void *) __get_free_pages(gfp, get_order(size)); |
| 90 | |
| 91 | if (ret != NULL) { |
| 92 | memset(ret, 0, size); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 93 | *dma_handle = plat_map_dma_mem(dev, ret, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | return ret; |
| 97 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | EXPORT_SYMBOL(dma_alloc_noncoherent); |
| 99 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 100 | static void *mips_dma_alloc_coherent(struct device *dev, size_t size, |
Andrzej Pietrasiewicz | e8d51e5 | 2012-03-27 14:32:21 +0200 | [diff] [blame] | 101 | dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | { |
| 103 | void *ret; |
| 104 | |
Yoichi Yuasa | f8ac042 | 2009-06-04 00:16:04 +0900 | [diff] [blame] | 105 | if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) |
| 106 | return ret; |
| 107 | |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 108 | gfp = massage_gfp_flags(dev, gfp); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 109 | |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 110 | ret = (void *) __get_free_pages(gfp, get_order(size)); |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (ret) { |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 113 | memset(ret, 0, size); |
| 114 | *dma_handle = plat_map_dma_mem(dev, ret, size); |
| 115 | |
| 116 | if (!plat_device_is_coherent(dev)) { |
| 117 | dma_cache_wback_inv((unsigned long) ret, size); |
| 118 | ret = UNCAC_ADDR(ret); |
| 119 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | return ret; |
| 123 | } |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr, |
| 127 | dma_addr_t dma_handle) |
| 128 | { |
Kevin Cernekee | d3f634b | 2009-04-23 17:03:43 -0700 | [diff] [blame] | 129 | plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | free_pages((unsigned long) vaddr, get_order(size)); |
| 131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | EXPORT_SYMBOL(dma_free_noncoherent); |
| 133 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 134 | static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr, |
Andrzej Pietrasiewicz | e8d51e5 | 2012-03-27 14:32:21 +0200 | [diff] [blame] | 135 | dma_addr_t dma_handle, struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
| 137 | unsigned long addr = (unsigned long) vaddr; |
Yoichi Yuasa | f8ac042 | 2009-06-04 00:16:04 +0900 | [diff] [blame] | 138 | int order = get_order(size); |
| 139 | |
| 140 | if (dma_release_from_coherent(dev, order, vaddr)) |
| 141 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Kevin Cernekee | d3f634b | 2009-04-23 17:03:43 -0700 | [diff] [blame] | 143 | plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL); |
David Daney | 11531ac | 2008-12-10 18:14:45 -0800 | [diff] [blame] | 144 | |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 145 | if (!plat_device_is_coherent(dev)) |
| 146 | addr = CAC_ADDR(addr); |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | free_pages(addr, get_order(size)); |
| 149 | } |
| 150 | |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 151 | static inline void __dma_sync_virtual(void *addr, size_t size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | enum dma_data_direction direction) |
| 153 | { |
| 154 | switch (direction) { |
| 155 | case DMA_TO_DEVICE: |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 156 | dma_cache_wback((unsigned long)addr, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | break; |
| 158 | |
| 159 | case DMA_FROM_DEVICE: |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 160 | dma_cache_inv((unsigned long)addr, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | break; |
| 162 | |
| 163 | case DMA_BIDIRECTIONAL: |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 164 | dma_cache_wback_inv((unsigned long)addr, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | break; |
| 166 | |
| 167 | default: |
| 168 | BUG(); |
| 169 | } |
| 170 | } |
| 171 | |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 172 | /* |
| 173 | * A single sg entry may refer to multiple physically contiguous |
| 174 | * pages. But we still need to process highmem pages individually. |
| 175 | * If highmem is not configured then the bulk of this loop gets |
| 176 | * optimized out. |
| 177 | */ |
| 178 | static inline void __dma_sync(struct page *page, |
| 179 | unsigned long offset, size_t size, enum dma_data_direction direction) |
| 180 | { |
| 181 | size_t left = size; |
| 182 | |
| 183 | do { |
| 184 | size_t len = left; |
| 185 | |
| 186 | if (PageHighMem(page)) { |
| 187 | void *addr; |
| 188 | |
| 189 | if (offset + len > PAGE_SIZE) { |
| 190 | if (offset >= PAGE_SIZE) { |
| 191 | page += offset >> PAGE_SHIFT; |
| 192 | offset &= ~PAGE_MASK; |
| 193 | } |
| 194 | len = PAGE_SIZE - offset; |
| 195 | } |
| 196 | |
| 197 | addr = kmap_atomic(page); |
| 198 | __dma_sync_virtual(addr + offset, len, direction); |
| 199 | kunmap_atomic(addr); |
| 200 | } else |
| 201 | __dma_sync_virtual(page_address(page) + offset, |
| 202 | size, direction); |
| 203 | offset = 0; |
| 204 | page++; |
| 205 | left -= len; |
| 206 | } while (left); |
| 207 | } |
| 208 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 209 | static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr, |
| 210 | size_t size, enum dma_data_direction direction, struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 212 | if (cpu_is_noncoherent_r10000(dev)) |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 213 | __dma_sync(dma_addr_to_page(dev, dma_addr), |
| 214 | dma_addr & ~PAGE_MASK, size, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Kevin Cernekee | d3f634b | 2009-04-23 17:03:43 -0700 | [diff] [blame] | 216 | plat_unmap_dma_mem(dev, dma_addr, size, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 219 | static int mips_dma_map_sg(struct device *dev, struct scatterlist *sg, |
| 220 | int nents, enum dma_data_direction direction, struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | { |
| 222 | int i; |
| 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | for (i = 0; i < nents; i++, sg++) { |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 225 | if (!plat_device_is_coherent(dev)) |
| 226 | __dma_sync(sg_page(sg), sg->offset, sg->length, |
| 227 | direction); |
| 228 | sg->dma_address = plat_map_dma_mem_page(dev, sg_page(sg)) + |
| 229 | sg->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | return nents; |
| 233 | } |
| 234 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 235 | static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page, |
| 236 | unsigned long offset, size_t size, enum dma_data_direction direction, |
| 237 | struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 239 | if (!plat_device_is_coherent(dev)) |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 240 | __dma_sync(page, offset, size, direction); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 241 | |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 242 | return plat_map_dma_mem_page(dev, page) + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 245 | static void mips_dma_unmap_sg(struct device *dev, struct scatterlist *sg, |
| 246 | int nhwentries, enum dma_data_direction direction, |
| 247 | struct dma_attrs *attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | int i; |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | for (i = 0; i < nhwentries; i++, sg++) { |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 252 | if (!plat_device_is_coherent(dev) && |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 253 | direction != DMA_TO_DEVICE) |
| 254 | __dma_sync(sg_page(sg), sg->offset, sg->length, |
| 255 | direction); |
Kevin Cernekee | d3f634b | 2009-04-23 17:03:43 -0700 | [diff] [blame] | 256 | plat_unmap_dma_mem(dev, sg->dma_address, sg->length, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | } |
| 259 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 260 | static void mips_dma_sync_single_for_cpu(struct device *dev, |
| 261 | dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 263 | if (cpu_is_noncoherent_r10000(dev)) |
| 264 | __dma_sync(dma_addr_to_page(dev, dma_handle), |
| 265 | dma_handle & ~PAGE_MASK, size, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 268 | static void mips_dma_sync_single_for_device(struct device *dev, |
| 269 | dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
David Daney | 843aef4 | 2008-12-11 15:33:36 -0800 | [diff] [blame] | 271 | plat_extra_sync_for_device(dev); |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 272 | if (!plat_device_is_coherent(dev)) |
| 273 | __dma_sync(dma_addr_to_page(dev, dma_handle), |
| 274 | dma_handle & ~PAGE_MASK, size, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 277 | static void mips_dma_sync_sg_for_cpu(struct device *dev, |
| 278 | struct scatterlist *sg, int nelems, enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
| 280 | int i; |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* Make sure that gcc doesn't leave the empty loop body. */ |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 283 | for (i = 0; i < nelems; i++, sg++) { |
Ralf Baechle | 5b648a9 | 2007-03-02 11:42:11 +0000 | [diff] [blame] | 284 | if (cpu_is_noncoherent_r10000(dev)) |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 285 | __dma_sync(sg_page(sg), sg->offset, sg->length, |
| 286 | direction); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 287 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 290 | static void mips_dma_sync_sg_for_device(struct device *dev, |
| 291 | struct scatterlist *sg, int nelems, enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
| 293 | int i; |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | /* Make sure that gcc doesn't leave the empty loop body. */ |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 296 | for (i = 0; i < nelems; i++, sg++) { |
| 297 | if (!plat_device_is_coherent(dev)) |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 298 | __dma_sync(sg_page(sg), sg->offset, sg->length, |
| 299 | direction); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
| 302 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 303 | int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | { |
David Daney | 843aef4 | 2008-12-11 15:33:36 -0800 | [diff] [blame] | 305 | return plat_dma_mapping_error(dev, dma_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 308 | int mips_dma_supported(struct device *dev, u64 mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
David Daney | 843aef4 | 2008-12-11 15:33:36 -0800 | [diff] [blame] | 310 | return plat_dma_supported(dev, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
Ralf Baechle | a3aad4a | 2010-12-09 19:14:09 +0000 | [diff] [blame] | 313 | void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 314 | enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 316 | BUG_ON(direction == DMA_NONE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
David Daney | 843aef4 | 2008-12-11 15:33:36 -0800 | [diff] [blame] | 318 | plat_extra_sync_for_device(dev); |
Ralf Baechle | 9a88cbb | 2006-11-16 02:56:12 +0000 | [diff] [blame] | 319 | if (!plat_device_is_coherent(dev)) |
Dezhong Diao | e36863a | 2010-10-13 16:57:35 -0700 | [diff] [blame] | 320 | __dma_sync_virtual(vaddr, size, direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Ralf Baechle | a3aad4a | 2010-12-09 19:14:09 +0000 | [diff] [blame] | 323 | EXPORT_SYMBOL(dma_cache_sync); |
| 324 | |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 325 | static struct dma_map_ops mips_default_dma_map_ops = { |
Andrzej Pietrasiewicz | e8d51e5 | 2012-03-27 14:32:21 +0200 | [diff] [blame] | 326 | .alloc = mips_dma_alloc_coherent, |
| 327 | .free = mips_dma_free_coherent, |
David Daney | 48e1fd5 | 2010-10-01 13:27:32 -0700 | [diff] [blame] | 328 | .map_page = mips_dma_map_page, |
| 329 | .unmap_page = mips_dma_unmap_page, |
| 330 | .map_sg = mips_dma_map_sg, |
| 331 | .unmap_sg = mips_dma_unmap_sg, |
| 332 | .sync_single_for_cpu = mips_dma_sync_single_for_cpu, |
| 333 | .sync_single_for_device = mips_dma_sync_single_for_device, |
| 334 | .sync_sg_for_cpu = mips_dma_sync_sg_for_cpu, |
| 335 | .sync_sg_for_device = mips_dma_sync_sg_for_device, |
| 336 | .mapping_error = mips_dma_mapping_error, |
| 337 | .dma_supported = mips_dma_supported |
| 338 | }; |
| 339 | |
| 340 | struct dma_map_ops *mips_dma_map_ops = &mips_default_dma_map_ops; |
| 341 | EXPORT_SYMBOL(mips_dma_map_ops); |
| 342 | |
| 343 | #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) |
| 344 | |
| 345 | static int __init mips_dma_init(void) |
| 346 | { |
| 347 | dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | fs_initcall(mips_dma_init); |