| 1 | /* $NetBSD: nouveau_subdev_vm_base.c,v 1.3 2015/10/22 22:39:46 jmcneill Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2010 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_vm_base.c,v 1.3 2015/10/22 22:39:46 jmcneill Exp $" ); |
| 29 | |
| 30 | #include <core/gpuobj.h> |
| 31 | #include <core/mm.h> |
| 32 | |
| 33 | #include <subdev/fb.h> |
| 34 | #include <subdev/vm.h> |
| 35 | |
| 36 | void |
| 37 | nouveau_vm_map_at(struct nouveau_vma *vma, u64 delta, struct nouveau_mem *node) |
| 38 | { |
| 39 | struct nouveau_vm *vm = vma->vm; |
| 40 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 41 | struct nouveau_mm_node *r; |
| 42 | int big = vma->node->type != vmm->spg_shift; |
| 43 | u32 offset = vma->node->offset + (delta >> 12); |
| 44 | u32 bits = vma->node->type - 12; |
| 45 | u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| 46 | u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| 47 | u32 max = 1 << (vmm->pgt_bits - bits); |
| 48 | u32 end, len; |
| 49 | |
| 50 | delta = 0; |
| 51 | list_for_each_entry(r, &node->regions, rl_entry) { |
| 52 | u64 phys = (u64)r->offset << 12; |
| 53 | u32 num = r->length >> bits; |
| 54 | |
| 55 | while (num) { |
| 56 | struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| 57 | |
| 58 | end = (pte + num); |
| 59 | if (unlikely(end >= max)) |
| 60 | end = max; |
| 61 | len = end - pte; |
| 62 | |
| 63 | vmm->map(vma, pgt, node, pte, len, phys, delta); |
| 64 | |
| 65 | num -= len; |
| 66 | pte += len; |
| 67 | if (unlikely(end >= max)) { |
| 68 | phys += len << (bits + 12); |
| 69 | pde++; |
| 70 | pte = 0; |
| 71 | } |
| 72 | |
| 73 | delta += (u64)len << vma->node->type; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | vmm->flush(vm); |
| 78 | } |
| 79 | |
| 80 | #ifdef __NetBSD__ |
| 81 | |
| 82 | static void |
| 83 | nouveau_vm_map_dma(struct nouveau_vma *vma, u64 delta, u64 length, |
| 84 | struct nouveau_mem *mem) |
| 85 | { |
| 86 | struct nouveau_vm *vm = vma->vm; |
| 87 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 88 | int big = vma->node->type != vmm->spg_shift; |
| 89 | u32 offset = vma->node->offset + (delta >> 12); |
| 90 | u32 bits = vma->node->type - 12; |
| 91 | u32 num = length >> vma->node->type; |
| 92 | u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| 93 | u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| 94 | u32 max = 1 << (vmm->pgt_bits - bits); |
| 95 | unsigned seg, pgoff; |
| 96 | |
| 97 | for (seg = 0; seg < mem->pages->dm_nsegs; seg++) { |
| 98 | struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| 99 | dma_addr_t addr = mem->pages->dm_segs[seg].ds_addr; |
| 100 | |
| 101 | KASSERT((mem->pages->dm_segs[seg].ds_len & NOUVEAU_GPU_PAGE_MASK) == 0); |
| 102 | for (pgoff = 0; pgoff < mem->pages->dm_segs[seg].ds_len; |
| 103 | pgoff += NOUVEAU_GPU_PAGE_SIZE, addr += NOUVEAU_GPU_PAGE_SIZE) { |
| 104 | |
| 105 | vmm->map_sg(vma, pgt, mem, pte, 1, &addr); |
| 106 | num--; |
| 107 | pte++; |
| 108 | |
| 109 | if (num == 0) |
| 110 | goto finish; |
| 111 | |
| 112 | if (__predict_false(pte >= max)) { |
| 113 | pde++; |
| 114 | pte = 0; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | finish: |
| 120 | vmm->flush(vm); |
| 121 | } |
| 122 | |
| 123 | #else |
| 124 | |
| 125 | static void |
| 126 | nouveau_vm_map_sg_table(struct nouveau_vma *vma, u64 delta, u64 length, |
| 127 | struct nouveau_mem *mem) |
| 128 | { |
| 129 | struct nouveau_vm *vm = vma->vm; |
| 130 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 131 | int big = vma->node->type != vmm->spg_shift; |
| 132 | u32 offset = vma->node->offset + (delta >> 12); |
| 133 | u32 bits = vma->node->type - 12; |
| 134 | u32 num = length >> vma->node->type; |
| 135 | u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| 136 | u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| 137 | u32 max = 1 << (vmm->pgt_bits - bits); |
| 138 | unsigned m, sglen; |
| 139 | u32 end, len; |
| 140 | int i; |
| 141 | struct scatterlist *sg; |
| 142 | |
| 143 | for_each_sg(mem->sg->sgl, sg, mem->sg->nents, i) { |
| 144 | struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| 145 | sglen = sg_dma_len(sg) >> PAGE_SHIFT; |
| 146 | |
| 147 | end = pte + sglen; |
| 148 | if (unlikely(end >= max)) |
| 149 | end = max; |
| 150 | len = end - pte; |
| 151 | |
| 152 | for (m = 0; m < len; m++) { |
| 153 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); |
| 154 | |
| 155 | vmm->map_sg(vma, pgt, mem, pte, 1, &addr); |
| 156 | num--; |
| 157 | pte++; |
| 158 | |
| 159 | if (num == 0) |
| 160 | goto finish; |
| 161 | } |
| 162 | if (unlikely(end >= max)) { |
| 163 | pde++; |
| 164 | pte = 0; |
| 165 | } |
| 166 | if (m < sglen) { |
| 167 | for (; m < sglen; m++) { |
| 168 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); |
| 169 | |
| 170 | vmm->map_sg(vma, pgt, mem, pte, 1, &addr); |
| 171 | num--; |
| 172 | pte++; |
| 173 | if (num == 0) |
| 174 | goto finish; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | } |
| 179 | finish: |
| 180 | vmm->flush(vm); |
| 181 | } |
| 182 | |
| 183 | static void |
| 184 | nouveau_vm_map_sg(struct nouveau_vma *vma, u64 delta, u64 length, |
| 185 | struct nouveau_mem *mem) |
| 186 | { |
| 187 | struct nouveau_vm *vm = vma->vm; |
| 188 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 189 | dma_addr_t *list = mem->pages; |
| 190 | int big = vma->node->type != vmm->spg_shift; |
| 191 | u32 offset = vma->node->offset + (delta >> 12); |
| 192 | u32 bits = vma->node->type - 12; |
| 193 | u32 num = length >> vma->node->type; |
| 194 | u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| 195 | u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| 196 | u32 max = 1 << (vmm->pgt_bits - bits); |
| 197 | u32 end, len; |
| 198 | |
| 199 | while (num) { |
| 200 | struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| 201 | |
| 202 | end = (pte + num); |
| 203 | if (unlikely(end >= max)) |
| 204 | end = max; |
| 205 | len = end - pte; |
| 206 | |
| 207 | vmm->map_sg(vma, pgt, mem, pte, len, list); |
| 208 | |
| 209 | num -= len; |
| 210 | pte += len; |
| 211 | list += len; |
| 212 | if (unlikely(end >= max)) { |
| 213 | pde++; |
| 214 | pte = 0; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | vmm->flush(vm); |
| 219 | } |
| 220 | |
| 221 | #endif |
| 222 | |
| 223 | void |
| 224 | nouveau_vm_map(struct nouveau_vma *vma, struct nouveau_mem *node) |
| 225 | { |
| 226 | #ifdef __NetBSD__ |
| 227 | if (node->pages) |
| 228 | nouveau_vm_map_dma(vma, 0, node->size << 12, node); |
| 229 | else |
| 230 | nouveau_vm_map_at(vma, 0, node); |
| 231 | #else |
| 232 | if (node->sg) |
| 233 | nouveau_vm_map_sg_table(vma, 0, node->size << 12, node); |
| 234 | else |
| 235 | if (node->pages) |
| 236 | nouveau_vm_map_sg(vma, 0, node->size << 12, node); |
| 237 | else |
| 238 | nouveau_vm_map_at(vma, 0, node); |
| 239 | #endif |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | nouveau_vm_unmap_at(struct nouveau_vma *vma, u64 delta, u64 length) |
| 244 | { |
| 245 | struct nouveau_vm *vm = vma->vm; |
| 246 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 247 | int big = vma->node->type != vmm->spg_shift; |
| 248 | u32 offset = vma->node->offset + (delta >> 12); |
| 249 | u32 bits = vma->node->type - 12; |
| 250 | u32 num = length >> vma->node->type; |
| 251 | u32 pde = (offset >> vmm->pgt_bits) - vm->fpde; |
| 252 | u32 pte = (offset & ((1 << vmm->pgt_bits) - 1)) >> bits; |
| 253 | u32 max = 1 << (vmm->pgt_bits - bits); |
| 254 | u32 end, len; |
| 255 | |
| 256 | while (num) { |
| 257 | struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big]; |
| 258 | |
| 259 | end = (pte + num); |
| 260 | if (unlikely(end >= max)) |
| 261 | end = max; |
| 262 | len = end - pte; |
| 263 | |
| 264 | vmm->unmap(pgt, pte, len); |
| 265 | |
| 266 | num -= len; |
| 267 | pte += len; |
| 268 | if (unlikely(end >= max)) { |
| 269 | pde++; |
| 270 | pte = 0; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | vmm->flush(vm); |
| 275 | } |
| 276 | |
| 277 | void |
| 278 | nouveau_vm_unmap(struct nouveau_vma *vma) |
| 279 | { |
| 280 | nouveau_vm_unmap_at(vma, 0, (u64)vma->node->length << 12); |
| 281 | } |
| 282 | |
| 283 | static void |
| 284 | nouveau_vm_unmap_pgt(struct nouveau_vm *vm, int big, u32 fpde, u32 lpde) |
| 285 | { |
| 286 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 287 | struct nouveau_vm_pgd *vpgd; |
| 288 | struct nouveau_vm_pgt *vpgt; |
| 289 | struct nouveau_gpuobj *pgt; |
| 290 | u32 pde; |
| 291 | |
| 292 | for (pde = fpde; pde <= lpde; pde++) { |
| 293 | vpgt = &vm->pgt[pde - vm->fpde]; |
| 294 | if (--vpgt->refcount[big]) |
| 295 | continue; |
| 296 | |
| 297 | pgt = vpgt->obj[big]; |
| 298 | vpgt->obj[big] = NULL; |
| 299 | |
| 300 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
| 301 | vmm->map_pgt(vpgd->obj, pde, vpgt->obj); |
| 302 | } |
| 303 | |
| 304 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 305 | nouveau_gpuobj_ref(NULL, &pgt); |
| 306 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | static int |
| 311 | nouveau_vm_map_pgt(struct nouveau_vm *vm, u32 pde, u32 type) |
| 312 | { |
| 313 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 314 | struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
| 315 | struct nouveau_vm_pgd *vpgd; |
| 316 | struct nouveau_gpuobj *pgt; |
| 317 | int big = (type != vmm->spg_shift); |
| 318 | u32 pgt_size; |
| 319 | int ret; |
| 320 | |
| 321 | pgt_size = (1 << (vmm->pgt_bits + 12)) >> type; |
| 322 | pgt_size *= 8; |
| 323 | |
| 324 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 325 | ret = nouveau_gpuobj_new(nv_object(vm->vmm), NULL, pgt_size, 0x1000, |
| 326 | NVOBJ_FLAG_ZERO_ALLOC, &pgt); |
| 327 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 328 | if (unlikely(ret)) |
| 329 | return ret; |
| 330 | |
| 331 | /* someone beat us to filling the PDE while we didn't have the lock */ |
| 332 | if (unlikely(vpgt->refcount[big]++)) { |
| 333 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 334 | nouveau_gpuobj_ref(NULL, &pgt); |
| 335 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | vpgt->obj[big] = pgt; |
| 340 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
| 341 | vmm->map_pgt(vpgd->obj, pde, vpgt->obj); |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | int |
| 348 | nouveau_vm_get(struct nouveau_vm *vm, u64 size, u32 page_shift, |
| 349 | u32 access, struct nouveau_vma *vma) |
| 350 | { |
| 351 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 352 | u32 align = (1 << page_shift) >> 12; |
| 353 | u32 msize = size >> 12; |
| 354 | u32 fpde, lpde, pde; |
| 355 | int ret; |
| 356 | |
| 357 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 358 | ret = nouveau_mm_head(&vm->mm, page_shift, msize, msize, align, |
| 359 | &vma->node); |
| 360 | if (unlikely(ret != 0)) { |
| 361 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 362 | return ret; |
| 363 | } |
| 364 | |
| 365 | fpde = (vma->node->offset >> vmm->pgt_bits); |
| 366 | lpde = (vma->node->offset + vma->node->length - 1) >> vmm->pgt_bits; |
| 367 | |
| 368 | for (pde = fpde; pde <= lpde; pde++) { |
| 369 | struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
| 370 | int big = (vma->node->type != vmm->spg_shift); |
| 371 | |
| 372 | if (likely(vpgt->refcount[big])) { |
| 373 | vpgt->refcount[big]++; |
| 374 | continue; |
| 375 | } |
| 376 | |
| 377 | ret = nouveau_vm_map_pgt(vm, pde, vma->node->type); |
| 378 | if (ret) { |
| 379 | if (pde != fpde) |
| 380 | nouveau_vm_unmap_pgt(vm, big, fpde, pde - 1); |
| 381 | nouveau_mm_free(&vm->mm, &vma->node); |
| 382 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 383 | return ret; |
| 384 | } |
| 385 | } |
| 386 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 387 | |
| 388 | vma->vm = NULL; |
| 389 | nouveau_vm_ref(vm, &vma->vm, NULL); |
| 390 | vma->offset = (u64)vma->node->offset << 12; |
| 391 | vma->access = access; |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | void |
| 396 | nouveau_vm_put(struct nouveau_vma *vma) |
| 397 | { |
| 398 | struct nouveau_vm *vm = vma->vm; |
| 399 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 400 | u32 fpde, lpde; |
| 401 | |
| 402 | if (unlikely(vma->node == NULL)) |
| 403 | return; |
| 404 | fpde = (vma->node->offset >> vmm->pgt_bits); |
| 405 | lpde = (vma->node->offset + vma->node->length - 1) >> vmm->pgt_bits; |
| 406 | |
| 407 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 408 | nouveau_vm_unmap_pgt(vm, vma->node->type != vmm->spg_shift, fpde, lpde); |
| 409 | nouveau_mm_free(&vm->mm, &vma->node); |
| 410 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 411 | |
| 412 | nouveau_vm_ref(NULL, &vma->vm, NULL); |
| 413 | } |
| 414 | |
| 415 | int |
| 416 | nouveau_vm_create(struct nouveau_vmmgr *vmm, u64 offset, u64 length, |
| 417 | u64 mm_offset, u32 block, struct nouveau_vm **pvm) |
| 418 | { |
| 419 | struct nouveau_vm *vm; |
| 420 | u64 mm_length = (offset + length) - mm_offset; |
| 421 | int ret; |
| 422 | |
| 423 | vm = kzalloc(sizeof(*vm), GFP_KERNEL); |
| 424 | if (!vm) |
| 425 | return -ENOMEM; |
| 426 | |
| 427 | INIT_LIST_HEAD(&vm->pgd_list); |
| 428 | vm->vmm = vmm; |
| 429 | kref_init(&vm->refcount); |
| 430 | vm->fpde = offset >> (vmm->pgt_bits + 12); |
| 431 | vm->lpde = (offset + length - 1) >> (vmm->pgt_bits + 12); |
| 432 | |
| 433 | vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt)); |
| 434 | if (!vm->pgt) { |
| 435 | kfree(vm); |
| 436 | return -ENOMEM; |
| 437 | } |
| 438 | |
| 439 | ret = nouveau_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12, |
| 440 | block >> 12); |
| 441 | if (ret) { |
| 442 | vfree(vm->pgt); |
| 443 | kfree(vm); |
| 444 | return ret; |
| 445 | } |
| 446 | |
| 447 | *pvm = vm; |
| 448 | |
| 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | int |
| 453 | nouveau_vm_new(struct nouveau_device *device, u64 offset, u64 length, |
| 454 | u64 mm_offset, struct nouveau_vm **pvm) |
| 455 | { |
| 456 | struct nouveau_vmmgr *vmm = nouveau_vmmgr(device); |
| 457 | return vmm->create(vmm, offset, length, mm_offset, pvm); |
| 458 | } |
| 459 | |
| 460 | static int |
| 461 | nouveau_vm_link(struct nouveau_vm *vm, struct nouveau_gpuobj *pgd) |
| 462 | { |
| 463 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 464 | struct nouveau_vm_pgd *vpgd; |
| 465 | int i; |
| 466 | |
| 467 | if (!pgd) |
| 468 | return 0; |
| 469 | |
| 470 | vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL); |
| 471 | if (!vpgd) |
| 472 | return -ENOMEM; |
| 473 | |
| 474 | nouveau_gpuobj_ref(pgd, &vpgd->obj); |
| 475 | |
| 476 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 477 | for (i = vm->fpde; i <= vm->lpde; i++) |
| 478 | vmm->map_pgt(pgd, i, vm->pgt[i - vm->fpde].obj); |
| 479 | list_add(&vpgd->head, &vm->pgd_list); |
| 480 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static void |
| 485 | nouveau_vm_unlink(struct nouveau_vm *vm, struct nouveau_gpuobj *mpgd) |
| 486 | { |
| 487 | struct nouveau_vmmgr *vmm = vm->vmm; |
| 488 | struct nouveau_vm_pgd *vpgd, *tmp; |
| 489 | struct nouveau_gpuobj *pgd = NULL; |
| 490 | |
| 491 | if (!mpgd) |
| 492 | return; |
| 493 | |
| 494 | mutex_lock(&nv_subdev(vmm)->mutex); |
| 495 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { |
| 496 | if (vpgd->obj == mpgd) { |
| 497 | pgd = vpgd->obj; |
| 498 | list_del(&vpgd->head); |
| 499 | kfree(vpgd); |
| 500 | break; |
| 501 | } |
| 502 | } |
| 503 | mutex_unlock(&nv_subdev(vmm)->mutex); |
| 504 | |
| 505 | nouveau_gpuobj_ref(NULL, &pgd); |
| 506 | } |
| 507 | |
| 508 | static void |
| 509 | nouveau_vm_del(struct kref *kref) |
| 510 | { |
| 511 | struct nouveau_vm *vm = container_of(kref, typeof(*vm), refcount); |
| 512 | struct nouveau_vm_pgd *vpgd, *tmp; |
| 513 | |
| 514 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { |
| 515 | nouveau_vm_unlink(vm, vpgd->obj); |
| 516 | } |
| 517 | |
| 518 | nouveau_mm_fini(&vm->mm); |
| 519 | vfree(vm->pgt); |
| 520 | kfree(vm); |
| 521 | } |
| 522 | |
| 523 | int |
| 524 | nouveau_vm_ref(struct nouveau_vm *ref, struct nouveau_vm **ptr, |
| 525 | struct nouveau_gpuobj *pgd) |
| 526 | { |
| 527 | if (ref) { |
| 528 | int ret = nouveau_vm_link(ref, pgd); |
| 529 | if (ret) |
| 530 | return ret; |
| 531 | |
| 532 | kref_get(&ref->refcount); |
| 533 | } |
| 534 | |
| 535 | if (*ptr) { |
| 536 | nouveau_vm_unlink(*ptr, pgd); |
| 537 | kref_put(&(*ptr)->refcount, nouveau_vm_del); |
| 538 | } |
| 539 | |
| 540 | *ptr = ref; |
| 541 | return 0; |
| 542 | } |
| 543 | |