Commit | Line | Data |
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a11c3198 BS |
1 | /* |
2 | * Copyright 2010 Red Hat Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | * Authors: Ben Skeggs | |
23 | */ | |
c9582455 | 24 | #include "priv.h" |
a11c3198 | 25 | |
3863c9bc | 26 | #include <core/gpuobj.h> |
c9582455 | 27 | #include <subdev/fb.h> |
a11c3198 BS |
28 | |
29 | void | |
42594600 | 30 | nvkm_vm_map_at(struct nvkm_vma *vma, u64 delta, struct nvkm_mem *node) |
a11c3198 | 31 | { |
42594600 BS |
32 | struct nvkm_vm *vm = vma->vm; |
33 | struct nvkm_mmu *mmu = vm->mmu; | |
34 | struct nvkm_mm_node *r; | |
c9582455 | 35 | int big = vma->node->type != mmu->func->spg_shift; |
a11c3198 BS |
36 | u32 offset = vma->node->offset + (delta >> 12); |
37 | u32 bits = vma->node->type - 12; | |
c9582455 BS |
38 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
39 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
40 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
a11c3198 BS |
41 | u32 end, len; |
42 | ||
8f7286f8 | 43 | delta = 0; |
d5f42394 | 44 | list_for_each_entry(r, &node->regions, rl_entry) { |
a11c3198 BS |
45 | u64 phys = (u64)r->offset << 12; |
46 | u32 num = r->length >> bits; | |
47 | ||
48 | while (num) { | |
d0659d32 | 49 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
a11c3198 BS |
50 | |
51 | end = (pte + num); | |
52 | if (unlikely(end >= max)) | |
53 | end = max; | |
54 | len = end - pte; | |
55 | ||
c9582455 | 56 | mmu->func->map(vma, pgt, node, pte, len, phys, delta); |
a11c3198 BS |
57 | |
58 | num -= len; | |
59 | pte += len; | |
60 | if (unlikely(end >= max)) { | |
73c337e7 | 61 | phys += len << (bits + 12); |
a11c3198 BS |
62 | pde++; |
63 | pte = 0; | |
64 | } | |
8f7286f8 BS |
65 | |
66 | delta += (u64)len << vma->node->type; | |
a11c3198 BS |
67 | } |
68 | } | |
69 | ||
c9582455 | 70 | mmu->func->flush(vm); |
a11c3198 BS |
71 | } |
72 | ||
2e2cfbe6 | 73 | static void |
42594600 BS |
74 | nvkm_vm_map_sg_table(struct nvkm_vma *vma, u64 delta, u64 length, |
75 | struct nvkm_mem *mem) | |
22b33e8e | 76 | { |
42594600 BS |
77 | struct nvkm_vm *vm = vma->vm; |
78 | struct nvkm_mmu *mmu = vm->mmu; | |
c9582455 | 79 | int big = vma->node->type != mmu->func->spg_shift; |
22b33e8e DA |
80 | u32 offset = vma->node->offset + (delta >> 12); |
81 | u32 bits = vma->node->type - 12; | |
82 | u32 num = length >> vma->node->type; | |
c9582455 BS |
83 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
84 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
85 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
22b33e8e DA |
86 | unsigned m, sglen; |
87 | u32 end, len; | |
88 | int i; | |
89 | struct scatterlist *sg; | |
90 | ||
91 | for_each_sg(mem->sg->sgl, sg, mem->sg->nents, i) { | |
d0659d32 | 92 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
22b33e8e DA |
93 | sglen = sg_dma_len(sg) >> PAGE_SHIFT; |
94 | ||
95 | end = pte + sglen; | |
96 | if (unlikely(end >= max)) | |
97 | end = max; | |
98 | len = end - pte; | |
99 | ||
100 | for (m = 0; m < len; m++) { | |
101 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); | |
102 | ||
c9582455 | 103 | mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr); |
22b33e8e DA |
104 | num--; |
105 | pte++; | |
106 | ||
107 | if (num == 0) | |
108 | goto finish; | |
109 | } | |
110 | if (unlikely(end >= max)) { | |
111 | pde++; | |
112 | pte = 0; | |
113 | } | |
114 | if (m < sglen) { | |
115 | for (; m < sglen; m++) { | |
116 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); | |
117 | ||
c9582455 | 118 | mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr); |
22b33e8e DA |
119 | num--; |
120 | pte++; | |
121 | if (num == 0) | |
122 | goto finish; | |
123 | } | |
124 | } | |
125 | ||
126 | } | |
127 | finish: | |
c9582455 | 128 | mmu->func->flush(vm); |
22b33e8e DA |
129 | } |
130 | ||
2e2cfbe6 | 131 | static void |
42594600 BS |
132 | nvkm_vm_map_sg(struct nvkm_vma *vma, u64 delta, u64 length, |
133 | struct nvkm_mem *mem) | |
a11c3198 | 134 | { |
42594600 BS |
135 | struct nvkm_vm *vm = vma->vm; |
136 | struct nvkm_mmu *mmu = vm->mmu; | |
f7b24c42 | 137 | dma_addr_t *list = mem->pages; |
c9582455 | 138 | int big = vma->node->type != mmu->func->spg_shift; |
a11c3198 BS |
139 | u32 offset = vma->node->offset + (delta >> 12); |
140 | u32 bits = vma->node->type - 12; | |
141 | u32 num = length >> vma->node->type; | |
c9582455 BS |
142 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
143 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
144 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
a11c3198 BS |
145 | u32 end, len; |
146 | ||
147 | while (num) { | |
d0659d32 | 148 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
a11c3198 BS |
149 | |
150 | end = (pte + num); | |
151 | if (unlikely(end >= max)) | |
152 | end = max; | |
153 | len = end - pte; | |
154 | ||
c9582455 | 155 | mmu->func->map_sg(vma, pgt, mem, pte, len, list); |
a11c3198 BS |
156 | |
157 | num -= len; | |
158 | pte += len; | |
159 | list += len; | |
160 | if (unlikely(end >= max)) { | |
161 | pde++; | |
162 | pte = 0; | |
163 | } | |
164 | } | |
165 | ||
c9582455 | 166 | mmu->func->flush(vm); |
a11c3198 BS |
167 | } |
168 | ||
2e2cfbe6 | 169 | void |
42594600 | 170 | nvkm_vm_map(struct nvkm_vma *vma, struct nvkm_mem *node) |
2e2cfbe6 BS |
171 | { |
172 | if (node->sg) | |
42594600 | 173 | nvkm_vm_map_sg_table(vma, 0, node->size << 12, node); |
2e2cfbe6 BS |
174 | else |
175 | if (node->pages) | |
42594600 | 176 | nvkm_vm_map_sg(vma, 0, node->size << 12, node); |
2e2cfbe6 | 177 | else |
42594600 | 178 | nvkm_vm_map_at(vma, 0, node); |
2e2cfbe6 BS |
179 | } |
180 | ||
a11c3198 | 181 | void |
42594600 | 182 | nvkm_vm_unmap_at(struct nvkm_vma *vma, u64 delta, u64 length) |
a11c3198 | 183 | { |
42594600 BS |
184 | struct nvkm_vm *vm = vma->vm; |
185 | struct nvkm_mmu *mmu = vm->mmu; | |
c9582455 | 186 | int big = vma->node->type != mmu->func->spg_shift; |
a11c3198 BS |
187 | u32 offset = vma->node->offset + (delta >> 12); |
188 | u32 bits = vma->node->type - 12; | |
189 | u32 num = length >> vma->node->type; | |
c9582455 BS |
190 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
191 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
192 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
a11c3198 BS |
193 | u32 end, len; |
194 | ||
195 | while (num) { | |
d0659d32 | 196 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
a11c3198 BS |
197 | |
198 | end = (pte + num); | |
199 | if (unlikely(end >= max)) | |
200 | end = max; | |
201 | len = end - pte; | |
202 | ||
c9582455 | 203 | mmu->func->unmap(vma, pgt, pte, len); |
a11c3198 BS |
204 | |
205 | num -= len; | |
206 | pte += len; | |
207 | if (unlikely(end >= max)) { | |
208 | pde++; | |
209 | pte = 0; | |
210 | } | |
211 | } | |
212 | ||
c9582455 | 213 | mmu->func->flush(vm); |
a11c3198 BS |
214 | } |
215 | ||
216 | void | |
42594600 | 217 | nvkm_vm_unmap(struct nvkm_vma *vma) |
a11c3198 | 218 | { |
42594600 | 219 | nvkm_vm_unmap_at(vma, 0, (u64)vma->node->length << 12); |
a11c3198 BS |
220 | } |
221 | ||
222 | static void | |
42594600 | 223 | nvkm_vm_unmap_pgt(struct nvkm_vm *vm, int big, u32 fpde, u32 lpde) |
a11c3198 | 224 | { |
42594600 BS |
225 | struct nvkm_mmu *mmu = vm->mmu; |
226 | struct nvkm_vm_pgd *vpgd; | |
227 | struct nvkm_vm_pgt *vpgt; | |
d0659d32 | 228 | struct nvkm_memory *pgt; |
a11c3198 BS |
229 | u32 pde; |
230 | ||
231 | for (pde = fpde; pde <= lpde; pde++) { | |
232 | vpgt = &vm->pgt[pde - vm->fpde]; | |
3ee01281 | 233 | if (--vpgt->refcount[big]) |
a11c3198 BS |
234 | continue; |
235 | ||
d0659d32 BS |
236 | pgt = vpgt->mem[big]; |
237 | vpgt->mem[big] = NULL; | |
3ee01281 | 238 | |
a11c3198 | 239 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
c9582455 | 240 | mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem); |
a11c3198 BS |
241 | } |
242 | ||
d0659d32 | 243 | nvkm_memory_del(&pgt); |
a11c3198 BS |
244 | } |
245 | } | |
246 | ||
247 | static int | |
42594600 | 248 | nvkm_vm_map_pgt(struct nvkm_vm *vm, u32 pde, u32 type) |
a11c3198 | 249 | { |
42594600 BS |
250 | struct nvkm_mmu *mmu = vm->mmu; |
251 | struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; | |
252 | struct nvkm_vm_pgd *vpgd; | |
c9582455 | 253 | int big = (type != mmu->func->spg_shift); |
a11c3198 BS |
254 | u32 pgt_size; |
255 | int ret; | |
256 | ||
c9582455 | 257 | pgt_size = (1 << (mmu->func->pgt_bits + 12)) >> type; |
a11c3198 BS |
258 | pgt_size *= 8; |
259 | ||
d0659d32 BS |
260 | ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST, |
261 | pgt_size, 0x1000, true, &vpgt->mem[big]); | |
a11c3198 BS |
262 | if (unlikely(ret)) |
263 | return ret; | |
264 | ||
a11c3198 | 265 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
c9582455 | 266 | mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem); |
a11c3198 BS |
267 | } |
268 | ||
1de68568 | 269 | vpgt->refcount[big]++; |
a11c3198 BS |
270 | return 0; |
271 | } | |
272 | ||
273 | int | |
42594600 BS |
274 | nvkm_vm_get(struct nvkm_vm *vm, u64 size, u32 page_shift, u32 access, |
275 | struct nvkm_vma *vma) | |
a11c3198 | 276 | { |
42594600 | 277 | struct nvkm_mmu *mmu = vm->mmu; |
a11c3198 BS |
278 | u32 align = (1 << page_shift) >> 12; |
279 | u32 msize = size >> 12; | |
280 | u32 fpde, lpde, pde; | |
281 | int ret; | |
282 | ||
1de68568 | 283 | mutex_lock(&vm->mutex); |
42594600 BS |
284 | ret = nvkm_mm_head(&vm->mm, 0, page_shift, msize, msize, align, |
285 | &vma->node); | |
a11c3198 | 286 | if (unlikely(ret != 0)) { |
1de68568 | 287 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
288 | return ret; |
289 | } | |
290 | ||
c9582455 BS |
291 | fpde = (vma->node->offset >> mmu->func->pgt_bits); |
292 | lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits; | |
ebb945a9 | 293 | |
a11c3198 | 294 | for (pde = fpde; pde <= lpde; pde++) { |
42594600 | 295 | struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
c9582455 | 296 | int big = (vma->node->type != mmu->func->spg_shift); |
a11c3198 | 297 | |
3ee01281 BS |
298 | if (likely(vpgt->refcount[big])) { |
299 | vpgt->refcount[big]++; | |
a11c3198 BS |
300 | continue; |
301 | } | |
302 | ||
42594600 | 303 | ret = nvkm_vm_map_pgt(vm, pde, vma->node->type); |
a11c3198 BS |
304 | if (ret) { |
305 | if (pde != fpde) | |
42594600 BS |
306 | nvkm_vm_unmap_pgt(vm, big, fpde, pde - 1); |
307 | nvkm_mm_free(&vm->mm, &vma->node); | |
1de68568 | 308 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
309 | return ret; |
310 | } | |
311 | } | |
1de68568 | 312 | mutex_unlock(&vm->mutex); |
a11c3198 | 313 | |
780194b1 | 314 | vma->vm = NULL; |
42594600 | 315 | nvkm_vm_ref(vm, &vma->vm, NULL); |
a11c3198 BS |
316 | vma->offset = (u64)vma->node->offset << 12; |
317 | vma->access = access; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | void | |
42594600 | 322 | nvkm_vm_put(struct nvkm_vma *vma) |
a11c3198 | 323 | { |
227c95d9 BS |
324 | struct nvkm_mmu *mmu; |
325 | struct nvkm_vm *vm; | |
a11c3198 BS |
326 | u32 fpde, lpde; |
327 | ||
328 | if (unlikely(vma->node == NULL)) | |
329 | return; | |
227c95d9 BS |
330 | vm = vma->vm; |
331 | mmu = vm->mmu; | |
332 | ||
c9582455 BS |
333 | fpde = (vma->node->offset >> mmu->func->pgt_bits); |
334 | lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits; | |
a11c3198 | 335 | |
1de68568 | 336 | mutex_lock(&vm->mutex); |
c9582455 | 337 | nvkm_vm_unmap_pgt(vm, vma->node->type != mmu->func->spg_shift, fpde, lpde); |
42594600 | 338 | nvkm_mm_free(&vm->mm, &vma->node); |
1de68568 | 339 | mutex_unlock(&vm->mutex); |
780194b1 | 340 | |
42594600 | 341 | nvkm_vm_ref(NULL, &vma->vm, NULL); |
a11c3198 BS |
342 | } |
343 | ||
d8e83994 BS |
344 | int |
345 | nvkm_vm_boot(struct nvkm_vm *vm, u64 size) | |
346 | { | |
347 | struct nvkm_mmu *mmu = vm->mmu; | |
d0659d32 | 348 | struct nvkm_memory *pgt; |
d8e83994 BS |
349 | int ret; |
350 | ||
d0659d32 | 351 | ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST, |
c9582455 | 352 | (size >> mmu->func->spg_shift) * 8, 0x1000, true, &pgt); |
d8e83994 BS |
353 | if (ret == 0) { |
354 | vm->pgt[0].refcount[0] = 1; | |
d0659d32 BS |
355 | vm->pgt[0].mem[0] = pgt; |
356 | nvkm_memory_boot(pgt, vm); | |
d8e83994 BS |
357 | } |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
a11c3198 | 362 | int |
42594600 | 363 | nvkm_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset, |
1de68568 | 364 | u32 block, struct lock_class_key *key, struct nvkm_vm **pvm) |
a11c3198 | 365 | { |
1de68568 | 366 | static struct lock_class_key _key; |
42594600 | 367 | struct nvkm_vm *vm; |
a11c3198 | 368 | u64 mm_length = (offset + length) - mm_offset; |
a11c3198 BS |
369 | int ret; |
370 | ||
cfd376b6 | 371 | vm = kzalloc(sizeof(*vm), GFP_KERNEL); |
a11c3198 BS |
372 | if (!vm) |
373 | return -ENOMEM; | |
374 | ||
1de68568 | 375 | __mutex_init(&vm->mutex, "&vm->mutex", key ? key : &_key); |
3863c9bc | 376 | INIT_LIST_HEAD(&vm->pgd_list); |
5ce3bf3c | 377 | vm->mmu = mmu; |
e0bacd2f | 378 | kref_init(&vm->refcount); |
c9582455 BS |
379 | vm->fpde = offset >> (mmu->func->pgt_bits + 12); |
380 | vm->lpde = (offset + length - 1) >> (mmu->func->pgt_bits + 12); | |
a11c3198 | 381 | |
d005f51e | 382 | vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt)); |
a11c3198 BS |
383 | if (!vm->pgt) { |
384 | kfree(vm); | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
42594600 BS |
388 | ret = nvkm_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12, |
389 | block >> 12); | |
a11c3198 | 390 | if (ret) { |
d005f51e | 391 | vfree(vm->pgt); |
a11c3198 BS |
392 | kfree(vm); |
393 | return ret; | |
394 | } | |
395 | ||
cfd376b6 MS |
396 | *pvm = vm; |
397 | ||
a11c3198 BS |
398 | return 0; |
399 | } | |
400 | ||
3863c9bc | 401 | int |
42594600 | 402 | nvkm_vm_new(struct nvkm_device *device, u64 offset, u64 length, u64 mm_offset, |
1de68568 | 403 | struct lock_class_key *key, struct nvkm_vm **pvm) |
3863c9bc | 404 | { |
c9582455 BS |
405 | struct nvkm_mmu *mmu = device->mmu; |
406 | if (!mmu->func->create) | |
407 | return -EINVAL; | |
408 | return mmu->func->create(mmu, offset, length, mm_offset, key, pvm); | |
3863c9bc BS |
409 | } |
410 | ||
a11c3198 | 411 | static int |
42594600 | 412 | nvkm_vm_link(struct nvkm_vm *vm, struct nvkm_gpuobj *pgd) |
a11c3198 | 413 | { |
42594600 BS |
414 | struct nvkm_mmu *mmu = vm->mmu; |
415 | struct nvkm_vm_pgd *vpgd; | |
a11c3198 BS |
416 | int i; |
417 | ||
418 | if (!pgd) | |
419 | return 0; | |
420 | ||
421 | vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL); | |
422 | if (!vpgd) | |
423 | return -ENOMEM; | |
424 | ||
f027f491 | 425 | vpgd->obj = pgd; |
a11c3198 | 426 | |
1de68568 | 427 | mutex_lock(&vm->mutex); |
3ee01281 | 428 | for (i = vm->fpde; i <= vm->lpde; i++) |
c9582455 | 429 | mmu->func->map_pgt(pgd, i, vm->pgt[i - vm->fpde].mem); |
a11c3198 | 430 | list_add(&vpgd->head, &vm->pgd_list); |
1de68568 | 431 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
432 | return 0; |
433 | } | |
434 | ||
435 | static void | |
42594600 | 436 | nvkm_vm_unlink(struct nvkm_vm *vm, struct nvkm_gpuobj *mpgd) |
a11c3198 | 437 | { |
42594600 | 438 | struct nvkm_vm_pgd *vpgd, *tmp; |
a11c3198 | 439 | |
15ba79ad | 440 | if (!mpgd) |
a11c3198 BS |
441 | return; |
442 | ||
1de68568 | 443 | mutex_lock(&vm->mutex); |
a11c3198 | 444 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { |
15ba79ad | 445 | if (vpgd->obj == mpgd) { |
15ba79ad BS |
446 | list_del(&vpgd->head); |
447 | kfree(vpgd); | |
448 | break; | |
449 | } | |
a11c3198 | 450 | } |
1de68568 | 451 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
452 | } |
453 | ||
454 | static void | |
42594600 | 455 | nvkm_vm_del(struct kref *kref) |
a11c3198 | 456 | { |
42594600 BS |
457 | struct nvkm_vm *vm = container_of(kref, typeof(*vm), refcount); |
458 | struct nvkm_vm_pgd *vpgd, *tmp; | |
a11c3198 BS |
459 | |
460 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { | |
42594600 | 461 | nvkm_vm_unlink(vm, vpgd->obj); |
a11c3198 | 462 | } |
a11c3198 | 463 | |
42594600 | 464 | nvkm_mm_fini(&vm->mm); |
d005f51e | 465 | vfree(vm->pgt); |
a11c3198 BS |
466 | kfree(vm); |
467 | } | |
468 | ||
469 | int | |
42594600 | 470 | nvkm_vm_ref(struct nvkm_vm *ref, struct nvkm_vm **ptr, struct nvkm_gpuobj *pgd) |
a11c3198 | 471 | { |
e0bacd2f | 472 | if (ref) { |
42594600 | 473 | int ret = nvkm_vm_link(ref, pgd); |
a11c3198 BS |
474 | if (ret) |
475 | return ret; | |
476 | ||
e0bacd2f | 477 | kref_get(&ref->refcount); |
a11c3198 BS |
478 | } |
479 | ||
e0bacd2f | 480 | if (*ptr) { |
42594600 BS |
481 | nvkm_vm_unlink(*ptr, pgd); |
482 | kref_put(&(*ptr)->refcount, nvkm_vm_del); | |
a11c3198 BS |
483 | } |
484 | ||
e0bacd2f | 485 | *ptr = ref; |
a11c3198 BS |
486 | return 0; |
487 | } | |
c9582455 BS |
488 | |
489 | static int | |
490 | nvkm_mmu_oneinit(struct nvkm_subdev *subdev) | |
491 | { | |
492 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
493 | if (mmu->func->oneinit) | |
494 | return mmu->func->oneinit(mmu); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static int | |
499 | nvkm_mmu_init(struct nvkm_subdev *subdev) | |
500 | { | |
501 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
502 | if (mmu->func->init) | |
503 | mmu->func->init(mmu); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static void * | |
508 | nvkm_mmu_dtor(struct nvkm_subdev *subdev) | |
509 | { | |
510 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
511 | if (mmu->func->dtor) | |
512 | return mmu->func->dtor(mmu); | |
513 | return mmu; | |
514 | } | |
515 | ||
516 | static const struct nvkm_subdev_func | |
517 | nvkm_mmu = { | |
518 | .dtor = nvkm_mmu_dtor, | |
519 | .oneinit = nvkm_mmu_oneinit, | |
520 | .init = nvkm_mmu_init, | |
521 | }; | |
522 | ||
523 | void | |
524 | nvkm_mmu_ctor(const struct nvkm_mmu_func *func, struct nvkm_device *device, | |
525 | int index, struct nvkm_mmu *mmu) | |
526 | { | |
56d06fa2 | 527 | nvkm_subdev_ctor(&nvkm_mmu, device, index, &mmu->subdev); |
c9582455 BS |
528 | mmu->func = func; |
529 | mmu->limit = func->limit; | |
530 | mmu->dma_bits = func->dma_bits; | |
531 | mmu->lpg_shift = func->lpg_shift; | |
532 | } | |
533 | ||
534 | int | |
535 | nvkm_mmu_new_(const struct nvkm_mmu_func *func, struct nvkm_device *device, | |
536 | int index, struct nvkm_mmu **pmmu) | |
537 | { | |
538 | if (!(*pmmu = kzalloc(sizeof(**pmmu), GFP_KERNEL))) | |
539 | return -ENOMEM; | |
540 | nvkm_mmu_ctor(func, device, index, *pmmu); | |
541 | return 0; | |
542 | } |