Angel Pons | ebda03e | 2020-04-02 23:48:05 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 2 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 3 | #include <commonlib/helpers.h> |
Aaron Durbin | dc9f5cd | 2015-09-08 13:34:43 -0500 | [diff] [blame] | 4 | #include <commonlib/region.h> |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 5 | #include <string.h> |
| 6 | |
Aaron Durbin | 02103e3 | 2017-12-14 15:22:04 -0700 | [diff] [blame] | 7 | int region_is_subregion(const struct region *p, const struct region *c) |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 8 | { |
| 9 | if (region_offset(c) < region_offset(p)) |
| 10 | return 0; |
| 11 | |
Julius Werner | 5c82c44 | 2019-08-15 21:25:16 -0700 | [diff] [blame] | 12 | if (region_end(c) > region_end(p)) |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 13 | return 0; |
| 14 | |
Julius Werner | 5c82c44 | 2019-08-15 21:25:16 -0700 | [diff] [blame] | 15 | if (region_end(c) < region_offset(c)) |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 16 | return 0; |
| 17 | |
| 18 | return 1; |
| 19 | } |
| 20 | |
| 21 | static int normalize_and_ok(const struct region *outer, struct region *inner) |
| 22 | { |
| 23 | inner->offset += region_offset(outer); |
Aaron Durbin | 02103e3 | 2017-12-14 15:22:04 -0700 | [diff] [blame] | 24 | return region_is_subregion(outer, inner); |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 25 | } |
| 26 | |
| 27 | static const struct region_device *rdev_root(const struct region_device *rdev) |
| 28 | { |
| 29 | if (rdev->root == NULL) |
| 30 | return rdev; |
| 31 | return rdev->root; |
| 32 | } |
| 33 | |
Aaron Durbin | 990ab7e | 2015-12-15 13:29:41 -0600 | [diff] [blame] | 34 | ssize_t rdev_relative_offset(const struct region_device *p, |
| 35 | const struct region_device *c) |
| 36 | { |
| 37 | if (rdev_root(p) != rdev_root(c)) |
| 38 | return -1; |
| 39 | |
Aaron Durbin | 02103e3 | 2017-12-14 15:22:04 -0700 | [diff] [blame] | 40 | if (!region_is_subregion(&p->region, &c->region)) |
Aaron Durbin | 990ab7e | 2015-12-15 13:29:41 -0600 | [diff] [blame] | 41 | return -1; |
| 42 | |
| 43 | return region_device_offset(c) - region_device_offset(p); |
| 44 | } |
| 45 | |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 46 | void *rdev_mmap(const struct region_device *rd, size_t offset, size_t size) |
| 47 | { |
| 48 | const struct region_device *rdev; |
| 49 | struct region req = { |
| 50 | .offset = offset, |
| 51 | .size = size, |
| 52 | }; |
| 53 | |
| 54 | if (!normalize_and_ok(&rd->region, &req)) |
| 55 | return NULL; |
| 56 | |
| 57 | rdev = rdev_root(rd); |
| 58 | |
Aaron Durbin | edd7959 | 2016-08-10 11:39:00 -0500 | [diff] [blame] | 59 | if (rdev->ops->mmap == NULL) |
| 60 | return NULL; |
| 61 | |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 62 | return rdev->ops->mmap(rdev, req.offset, req.size); |
| 63 | } |
| 64 | |
| 65 | int rdev_munmap(const struct region_device *rd, void *mapping) |
| 66 | { |
| 67 | const struct region_device *rdev; |
| 68 | |
| 69 | rdev = rdev_root(rd); |
| 70 | |
Aaron Durbin | edd7959 | 2016-08-10 11:39:00 -0500 | [diff] [blame] | 71 | if (rdev->ops->munmap == NULL) |
| 72 | return -1; |
| 73 | |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 74 | return rdev->ops->munmap(rdev, mapping); |
| 75 | } |
| 76 | |
| 77 | ssize_t rdev_readat(const struct region_device *rd, void *b, size_t offset, |
| 78 | size_t size) |
| 79 | { |
| 80 | const struct region_device *rdev; |
| 81 | struct region req = { |
| 82 | .offset = offset, |
| 83 | .size = size, |
| 84 | }; |
| 85 | |
| 86 | if (!normalize_and_ok(&rd->region, &req)) |
| 87 | return -1; |
| 88 | |
| 89 | rdev = rdev_root(rd); |
| 90 | |
| 91 | return rdev->ops->readat(rdev, b, req.offset, req.size); |
| 92 | } |
| 93 | |
Aaron Durbin | 258a350 | 2016-08-04 14:33:58 -0500 | [diff] [blame] | 94 | ssize_t rdev_writeat(const struct region_device *rd, const void *b, |
| 95 | size_t offset, size_t size) |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 96 | { |
| 97 | const struct region_device *rdev; |
| 98 | struct region req = { |
| 99 | .offset = offset, |
| 100 | .size = size, |
| 101 | }; |
| 102 | |
| 103 | if (!normalize_and_ok(&rd->region, &req)) |
| 104 | return -1; |
| 105 | |
| 106 | rdev = rdev_root(rd); |
| 107 | |
| 108 | if (rdev->ops->writeat == NULL) |
| 109 | return -1; |
| 110 | |
| 111 | return rdev->ops->writeat(rdev, b, req.offset, req.size); |
| 112 | } |
| 113 | |
| 114 | ssize_t rdev_eraseat(const struct region_device *rd, size_t offset, |
| 115 | size_t size) |
| 116 | { |
| 117 | const struct region_device *rdev; |
| 118 | struct region req = { |
| 119 | .offset = offset, |
| 120 | .size = size, |
| 121 | }; |
| 122 | |
| 123 | if (!normalize_and_ok(&rd->region, &req)) |
| 124 | return -1; |
| 125 | |
| 126 | rdev = rdev_root(rd); |
| 127 | |
| 128 | /* If the eraseat ptr is NULL we assume that the erase |
| 129 | * function was completed successfully. */ |
| 130 | if (rdev->ops->eraseat == NULL) |
| 131 | return size; |
| 132 | |
| 133 | return rdev->ops->eraseat(rdev, req.offset, req.size); |
| 134 | } |
| 135 | |
Aaron Durbin | 5d5f4b3 | 2015-03-26 14:39:07 -0500 | [diff] [blame] | 136 | int rdev_chain(struct region_device *child, const struct region_device *parent, |
| 137 | size_t offset, size_t size) |
| 138 | { |
| 139 | struct region req = { |
| 140 | .offset = offset, |
| 141 | .size = size, |
| 142 | }; |
| 143 | |
| 144 | if (!normalize_and_ok(&parent->region, &req)) |
| 145 | return -1; |
| 146 | |
| 147 | /* Keep track of root region device. Note the offsets are relative |
| 148 | * to the root device. */ |
| 149 | child->root = rdev_root(parent); |
| 150 | child->ops = NULL; |
| 151 | child->region.offset = req.offset; |
| 152 | child->region.size = req.size; |
| 153 | |
| 154 | return 0; |
| 155 | } |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 156 | |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 157 | static void mem_region_device_init(struct mem_region_device *mdev, |
| 158 | const struct region_device_ops *ops, void *base, size_t size) |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 159 | { |
| 160 | memset(mdev, 0, sizeof(*mdev)); |
| 161 | mdev->base = base; |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 162 | mdev->rdev.ops = ops; |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 163 | mdev->rdev.region.size = size; |
| 164 | } |
| 165 | |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 166 | void mem_region_device_ro_init(struct mem_region_device *mdev, void *base, |
| 167 | size_t size) |
| 168 | { |
| 169 | return mem_region_device_init(mdev, &mem_rdev_ro_ops, base, size); |
| 170 | } |
| 171 | |
| 172 | void mem_region_device_rw_init(struct mem_region_device *mdev, void *base, |
| 173 | size_t size) |
| 174 | { |
| 175 | return mem_region_device_init(mdev, &mem_rdev_rw_ops, base, size); |
| 176 | } |
| 177 | |
Furquan Shaikh | 2b57691 | 2016-06-19 23:16:45 -0700 | [diff] [blame] | 178 | void region_device_init(struct region_device *rdev, |
| 179 | const struct region_device_ops *ops, size_t offset, |
| 180 | size_t size) |
| 181 | { |
| 182 | memset(rdev, 0, sizeof(*rdev)); |
| 183 | rdev->root = NULL; |
| 184 | rdev->ops = ops; |
| 185 | rdev->region.offset = offset; |
| 186 | rdev->region.size = size; |
| 187 | } |
| 188 | |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 189 | static void xlate_region_device_init(struct xlate_region_device *xdev, |
| 190 | const struct region_device_ops *ops, |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 191 | size_t window_count, const struct xlate_window *window_arr, |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 192 | size_t parent_size) |
Furquan Shaikh | 2b57691 | 2016-06-19 23:16:45 -0700 | [diff] [blame] | 193 | { |
| 194 | memset(xdev, 0, sizeof(*xdev)); |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 195 | xdev->window_count = window_count; |
| 196 | xdev->window_arr = window_arr; |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 197 | region_device_init(&xdev->rdev, ops, 0, parent_size); |
| 198 | } |
| 199 | |
| 200 | void xlate_region_device_ro_init(struct xlate_region_device *xdev, |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 201 | size_t window_count, const struct xlate_window *window_arr, |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 202 | size_t parent_size) |
| 203 | { |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 204 | xlate_region_device_init(xdev, &xlate_rdev_ro_ops, window_count, window_arr, |
| 205 | parent_size); |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | void xlate_region_device_rw_init(struct xlate_region_device *xdev, |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 209 | size_t window_count, const struct xlate_window *window_arr, |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 210 | size_t parent_size) |
| 211 | { |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 212 | xlate_region_device_init(xdev, &xlate_rdev_rw_ops, window_count, window_arr, |
| 213 | parent_size); |
| 214 | } |
| 215 | |
| 216 | void xlate_window_init(struct xlate_window *window, const struct region_device *access_dev, |
| 217 | size_t sub_region_offset, size_t sub_region_size) |
| 218 | { |
| 219 | window->access_dev = access_dev; |
| 220 | window->sub_region.offset = sub_region_offset; |
| 221 | window->sub_region.size = sub_region_size; |
Furquan Shaikh | 2b57691 | 2016-06-19 23:16:45 -0700 | [diff] [blame] | 222 | } |
| 223 | |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 224 | static void *mdev_mmap(const struct region_device *rd, size_t offset, |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 225 | size_t size __unused) |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 226 | { |
| 227 | const struct mem_region_device *mdev; |
| 228 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 229 | mdev = container_of(rd, __typeof__(*mdev), rdev); |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 230 | |
| 231 | return &mdev->base[offset]; |
| 232 | } |
| 233 | |
Lee Leahy | 36d5b41 | 2017-03-10 11:02:11 -0800 | [diff] [blame] | 234 | static int mdev_munmap(const struct region_device *rd __unused, |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 235 | void *mapping __unused) |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 236 | { |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | static ssize_t mdev_readat(const struct region_device *rd, void *b, |
| 241 | size_t offset, size_t size) |
| 242 | { |
| 243 | const struct mem_region_device *mdev; |
| 244 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 245 | mdev = container_of(rd, __typeof__(*mdev), rdev); |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 246 | |
| 247 | memcpy(b, &mdev->base[offset], size); |
| 248 | |
| 249 | return size; |
| 250 | } |
| 251 | |
Aaron Durbin | 258a350 | 2016-08-04 14:33:58 -0500 | [diff] [blame] | 252 | static ssize_t mdev_writeat(const struct region_device *rd, const void *b, |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 253 | size_t offset, size_t size) |
| 254 | { |
| 255 | const struct mem_region_device *mdev; |
| 256 | |
| 257 | mdev = container_of(rd, __typeof__(*mdev), rdev); |
| 258 | |
| 259 | memcpy(&mdev->base[offset], b, size); |
| 260 | |
| 261 | return size; |
| 262 | } |
| 263 | |
| 264 | static ssize_t mdev_eraseat(const struct region_device *rd, size_t offset, |
| 265 | size_t size) |
| 266 | { |
| 267 | const struct mem_region_device *mdev; |
| 268 | |
| 269 | mdev = container_of(rd, __typeof__(*mdev), rdev); |
| 270 | |
| 271 | memset(&mdev->base[offset], 0, size); |
| 272 | |
| 273 | return size; |
| 274 | } |
| 275 | |
| 276 | const struct region_device_ops mem_rdev_ro_ops = { |
Aaron Durbin | b419c1a8 | 2015-03-27 01:03:45 -0500 | [diff] [blame] | 277 | .mmap = mdev_mmap, |
| 278 | .munmap = mdev_munmap, |
| 279 | .readat = mdev_readat, |
| 280 | }; |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 281 | |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 282 | const struct region_device_ops mem_rdev_rw_ops = { |
| 283 | .mmap = mdev_mmap, |
| 284 | .munmap = mdev_munmap, |
| 285 | .readat = mdev_readat, |
| 286 | .writeat = mdev_writeat, |
| 287 | .eraseat = mdev_eraseat, |
| 288 | }; |
| 289 | |
Julius Werner | c893197 | 2021-04-16 16:48:32 -0700 | [diff] [blame] | 290 | static const struct mem_region_device mem_rdev = MEM_REGION_DEV_RO_INIT(0, ~(size_t)0); |
| 291 | static const struct mem_region_device mem_rdev_rw = MEM_REGION_DEV_RW_INIT(0, ~(size_t)0); |
| 292 | |
| 293 | int rdev_chain_mem(struct region_device *child, const void *base, size_t size) |
| 294 | { |
| 295 | return rdev_chain(child, &mem_rdev.rdev, (uintptr_t)base, size); |
| 296 | } |
| 297 | |
| 298 | int rdev_chain_mem_rw(struct region_device *child, void *base, size_t size) |
| 299 | { |
| 300 | return rdev_chain(child, &mem_rdev_rw.rdev, (uintptr_t)base, size); |
| 301 | } |
| 302 | |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 303 | void *mmap_helper_rdev_mmap(const struct region_device *rd, size_t offset, |
| 304 | size_t size) |
| 305 | { |
| 306 | struct mmap_helper_region_device *mdev; |
| 307 | void *mapping; |
| 308 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 309 | mdev = container_of((void *)rd, __typeof__(*mdev), rdev); |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 310 | |
Julius Werner | 9b1f3cc | 2020-12-30 17:30:12 -0800 | [diff] [blame] | 311 | mapping = mem_pool_alloc(mdev->pool, size); |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 312 | |
| 313 | if (mapping == NULL) |
| 314 | return NULL; |
| 315 | |
| 316 | if (rd->ops->readat(rd, mapping, offset, size) != size) { |
Julius Werner | 9b1f3cc | 2020-12-30 17:30:12 -0800 | [diff] [blame] | 317 | mem_pool_free(mdev->pool, mapping); |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 318 | return NULL; |
| 319 | } |
| 320 | |
| 321 | return mapping; |
| 322 | } |
| 323 | |
| 324 | int mmap_helper_rdev_munmap(const struct region_device *rd, void *mapping) |
| 325 | { |
| 326 | struct mmap_helper_region_device *mdev; |
| 327 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 328 | mdev = container_of((void *)rd, __typeof__(*mdev), rdev); |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 329 | |
Julius Werner | 9b1f3cc | 2020-12-30 17:30:12 -0800 | [diff] [blame] | 330 | mem_pool_free(mdev->pool, mapping); |
Aaron Durbin | e62cf52 | 2015-03-27 01:58:06 -0500 | [diff] [blame] | 331 | |
| 332 | return 0; |
| 333 | } |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 334 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 335 | static const struct xlate_window *xlate_find_window(const struct xlate_region_device *xldev, |
| 336 | const struct region *req) |
| 337 | { |
| 338 | size_t i; |
| 339 | const struct xlate_window *xlwindow; |
| 340 | |
| 341 | for (i = 0; i < xldev->window_count; i++) { |
| 342 | xlwindow = &xldev->window_arr[i]; |
| 343 | if (region_is_subregion(&xlwindow->sub_region, req)) |
| 344 | return xlwindow; |
| 345 | } |
| 346 | |
| 347 | return NULL; |
| 348 | } |
| 349 | |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 350 | static void *xlate_mmap(const struct region_device *rd, size_t offset, |
| 351 | size_t size) |
| 352 | { |
| 353 | const struct xlate_region_device *xldev; |
| 354 | struct region req = { |
| 355 | .offset = offset, |
| 356 | .size = size, |
| 357 | }; |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 358 | const struct xlate_window *xlwindow; |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 359 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 360 | xldev = container_of(rd, __typeof__(*xldev), rdev); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 361 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 362 | xlwindow = xlate_find_window(xldev, &req); |
| 363 | if (!xlwindow) |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 364 | return NULL; |
| 365 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 366 | offset -= region_offset(&xlwindow->sub_region); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 367 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 368 | return rdev_mmap(xlwindow->access_dev, offset, size); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 369 | } |
| 370 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 371 | static int xlate_munmap(const struct region_device *rd __unused, void *mapping __unused) |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 372 | { |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 373 | /* |
| 374 | * xlate_region_device does not keep track of the access device that was used to service |
| 375 | * a mmap request. So, munmap does not do anything. If munmap functionality is required, |
| 376 | * then xlate_region_device will have to be updated to accept some pre-allocated space |
| 377 | * from caller to keep track of the mapping requests. Since xlate_region_device is only |
| 378 | * used for memory mapped boot media on the backend right now, skipping munmap is fine. |
| 379 | */ |
| 380 | return 0; |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | static ssize_t xlate_readat(const struct region_device *rd, void *b, |
| 384 | size_t offset, size_t size) |
| 385 | { |
| 386 | struct region req = { |
| 387 | .offset = offset, |
| 388 | .size = size, |
| 389 | }; |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 390 | const struct xlate_window *xlwindow; |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 391 | const struct xlate_region_device *xldev; |
| 392 | |
Aaron Durbin | ca0a676 | 2015-12-15 17:49:12 -0600 | [diff] [blame] | 393 | xldev = container_of(rd, __typeof__(*xldev), rdev); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 394 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 395 | xlwindow = xlate_find_window(xldev, &req); |
| 396 | if (!xlwindow) |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 397 | return -1; |
| 398 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 399 | offset -= region_offset(&xlwindow->sub_region); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 400 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 401 | return rdev_readat(xlwindow->access_dev, b, offset, size); |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 402 | } |
| 403 | |
Aaron Durbin | 258a350 | 2016-08-04 14:33:58 -0500 | [diff] [blame] | 404 | static ssize_t xlate_writeat(const struct region_device *rd, const void *b, |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 405 | size_t offset, size_t size) |
| 406 | { |
| 407 | struct region req = { |
| 408 | .offset = offset, |
| 409 | .size = size, |
| 410 | }; |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 411 | const struct xlate_window *xlwindow; |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 412 | const struct xlate_region_device *xldev; |
| 413 | |
| 414 | xldev = container_of(rd, __typeof__(*xldev), rdev); |
| 415 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 416 | xlwindow = xlate_find_window(xldev, &req); |
| 417 | if (!xlwindow) |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 418 | return -1; |
| 419 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 420 | offset -= region_offset(&xlwindow->sub_region); |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 421 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 422 | return rdev_writeat(xlwindow->access_dev, b, offset, size); |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | static ssize_t xlate_eraseat(const struct region_device *rd, |
| 426 | size_t offset, size_t size) |
| 427 | { |
| 428 | struct region req = { |
| 429 | .offset = offset, |
| 430 | .size = size, |
| 431 | }; |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 432 | const struct xlate_window *xlwindow; |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 433 | const struct xlate_region_device *xldev; |
| 434 | |
| 435 | xldev = container_of(rd, __typeof__(*xldev), rdev); |
| 436 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 437 | xlwindow = xlate_find_window(xldev, &req); |
| 438 | if (!xlwindow) |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 439 | return -1; |
| 440 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 441 | offset -= region_offset(&xlwindow->sub_region); |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 442 | |
Furquan Shaikh | f5b30ed | 2020-11-11 23:23:13 -0800 | [diff] [blame] | 443 | return rdev_eraseat(xlwindow->access_dev, offset, size); |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | const struct region_device_ops xlate_rdev_ro_ops = { |
Aaron Durbin | 5907eb8 | 2015-10-28 16:09:42 -0500 | [diff] [blame] | 447 | .mmap = xlate_mmap, |
| 448 | .munmap = xlate_munmap, |
| 449 | .readat = xlate_readat, |
| 450 | }; |
Antonello Dettori | e5f48d2 | 2016-06-22 21:09:08 +0200 | [diff] [blame] | 451 | |
| 452 | const struct region_device_ops xlate_rdev_rw_ops = { |
| 453 | .mmap = xlate_mmap, |
| 454 | .munmap = xlate_munmap, |
| 455 | .readat = xlate_readat, |
| 456 | .writeat = xlate_writeat, |
| 457 | .eraseat = xlate_eraseat, |
| 458 | }; |
Aaron Durbin | 256db40 | 2016-12-03 17:08:08 -0600 | [diff] [blame] | 459 | |
Aaron Durbin | 256db40 | 2016-12-03 17:08:08 -0600 | [diff] [blame] | 460 | static void *incoherent_mmap(const struct region_device *rd, size_t offset, |
| 461 | size_t size) |
| 462 | { |
| 463 | const struct incoherent_rdev *irdev; |
| 464 | |
| 465 | irdev = container_of(rd, const struct incoherent_rdev, rdev); |
| 466 | |
| 467 | return rdev_mmap(irdev->read, offset, size); |
| 468 | } |
| 469 | |
| 470 | static int incoherent_munmap(const struct region_device *rd, void *mapping) |
| 471 | { |
| 472 | const struct incoherent_rdev *irdev; |
| 473 | |
| 474 | irdev = container_of(rd, const struct incoherent_rdev, rdev); |
| 475 | |
| 476 | return rdev_munmap(irdev->read, mapping); |
| 477 | } |
| 478 | |
| 479 | static ssize_t incoherent_readat(const struct region_device *rd, void *b, |
| 480 | size_t offset, size_t size) |
| 481 | { |
| 482 | const struct incoherent_rdev *irdev; |
| 483 | |
| 484 | irdev = container_of(rd, const struct incoherent_rdev, rdev); |
| 485 | |
| 486 | return rdev_readat(irdev->read, b, offset, size); |
| 487 | } |
| 488 | |
| 489 | static ssize_t incoherent_writeat(const struct region_device *rd, const void *b, |
| 490 | size_t offset, size_t size) |
| 491 | { |
| 492 | const struct incoherent_rdev *irdev; |
| 493 | |
| 494 | irdev = container_of(rd, const struct incoherent_rdev, rdev); |
| 495 | |
| 496 | return rdev_writeat(irdev->write, b, offset, size); |
| 497 | } |
| 498 | |
| 499 | static ssize_t incoherent_eraseat(const struct region_device *rd, size_t offset, |
| 500 | size_t size) |
| 501 | { |
| 502 | const struct incoherent_rdev *irdev; |
| 503 | |
| 504 | irdev = container_of(rd, const struct incoherent_rdev, rdev); |
| 505 | |
| 506 | return rdev_eraseat(irdev->write, offset, size); |
| 507 | } |
| 508 | |
| 509 | static const struct region_device_ops incoherent_rdev_ops = { |
| 510 | .mmap = incoherent_mmap, |
| 511 | .munmap = incoherent_munmap, |
| 512 | .readat = incoherent_readat, |
| 513 | .writeat = incoherent_writeat, |
| 514 | .eraseat = incoherent_eraseat, |
| 515 | }; |
| 516 | |
| 517 | const struct region_device *incoherent_rdev_init(struct incoherent_rdev *irdev, |
| 518 | const struct region *r, |
| 519 | const struct region_device *read, |
| 520 | const struct region_device *write) |
| 521 | { |
| 522 | const size_t size = region_sz(r); |
| 523 | |
| 524 | if (size != region_device_sz(read) || size != region_device_sz(write)) |
| 525 | return NULL; |
| 526 | |
| 527 | /* The region is represented as offset 0 to size. That way, the generic |
| 528 | * rdev operations can be called on the read or write implementation |
| 529 | * without any unnecessary translation because the offsets all start |
| 530 | * at 0. */ |
| 531 | region_device_init(&irdev->rdev, &incoherent_rdev_ops, 0, size); |
| 532 | irdev->read = read; |
| 533 | irdev->write = write; |
| 534 | |
| 535 | return &irdev->rdev; |
| 536 | } |