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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; | |
134fdc1a | 34 | struct nvkm_mm_node *r = node->mem; |
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; |
134fdc1a | 44 | while (r) { |
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 | 67 | } |
134fdc1a | 68 | r = r->next; |
f5a5b523 | 69 | } |
a11c3198 | 70 | |
c9582455 | 71 | mmu->func->flush(vm); |
a11c3198 BS |
72 | } |
73 | ||
2e2cfbe6 | 74 | static void |
42594600 BS |
75 | nvkm_vm_map_sg_table(struct nvkm_vma *vma, u64 delta, u64 length, |
76 | struct nvkm_mem *mem) | |
22b33e8e | 77 | { |
42594600 BS |
78 | struct nvkm_vm *vm = vma->vm; |
79 | struct nvkm_mmu *mmu = vm->mmu; | |
c9582455 | 80 | int big = vma->node->type != mmu->func->spg_shift; |
22b33e8e DA |
81 | u32 offset = vma->node->offset + (delta >> 12); |
82 | u32 bits = vma->node->type - 12; | |
83 | u32 num = length >> vma->node->type; | |
c9582455 BS |
84 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
85 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
86 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
22b33e8e DA |
87 | unsigned m, sglen; |
88 | u32 end, len; | |
89 | int i; | |
90 | struct scatterlist *sg; | |
91 | ||
92 | for_each_sg(mem->sg->sgl, sg, mem->sg->nents, i) { | |
d0659d32 | 93 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
22b33e8e DA |
94 | sglen = sg_dma_len(sg) >> PAGE_SHIFT; |
95 | ||
96 | end = pte + sglen; | |
97 | if (unlikely(end >= max)) | |
98 | end = max; | |
99 | len = end - pte; | |
100 | ||
101 | for (m = 0; m < len; m++) { | |
102 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); | |
103 | ||
c9582455 | 104 | mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr); |
22b33e8e DA |
105 | num--; |
106 | pte++; | |
107 | ||
108 | if (num == 0) | |
109 | goto finish; | |
110 | } | |
111 | if (unlikely(end >= max)) { | |
112 | pde++; | |
113 | pte = 0; | |
114 | } | |
115 | if (m < sglen) { | |
116 | for (; m < sglen; m++) { | |
117 | dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT); | |
118 | ||
c9582455 | 119 | mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr); |
22b33e8e DA |
120 | num--; |
121 | pte++; | |
122 | if (num == 0) | |
123 | goto finish; | |
124 | } | |
125 | } | |
126 | ||
127 | } | |
128 | finish: | |
c9582455 | 129 | mmu->func->flush(vm); |
22b33e8e DA |
130 | } |
131 | ||
2e2cfbe6 | 132 | static void |
42594600 BS |
133 | nvkm_vm_map_sg(struct nvkm_vma *vma, u64 delta, u64 length, |
134 | struct nvkm_mem *mem) | |
a11c3198 | 135 | { |
42594600 BS |
136 | struct nvkm_vm *vm = vma->vm; |
137 | struct nvkm_mmu *mmu = vm->mmu; | |
f7b24c42 | 138 | dma_addr_t *list = mem->pages; |
c9582455 | 139 | int big = vma->node->type != mmu->func->spg_shift; |
a11c3198 BS |
140 | u32 offset = vma->node->offset + (delta >> 12); |
141 | u32 bits = vma->node->type - 12; | |
142 | u32 num = length >> vma->node->type; | |
c9582455 BS |
143 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
144 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
145 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
a11c3198 BS |
146 | u32 end, len; |
147 | ||
148 | while (num) { | |
d0659d32 | 149 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
a11c3198 BS |
150 | |
151 | end = (pte + num); | |
152 | if (unlikely(end >= max)) | |
153 | end = max; | |
154 | len = end - pte; | |
155 | ||
c9582455 | 156 | mmu->func->map_sg(vma, pgt, mem, pte, len, list); |
a11c3198 BS |
157 | |
158 | num -= len; | |
159 | pte += len; | |
160 | list += len; | |
161 | if (unlikely(end >= max)) { | |
162 | pde++; | |
163 | pte = 0; | |
164 | } | |
165 | } | |
166 | ||
c9582455 | 167 | mmu->func->flush(vm); |
a11c3198 BS |
168 | } |
169 | ||
2e2cfbe6 | 170 | void |
42594600 | 171 | nvkm_vm_map(struct nvkm_vma *vma, struct nvkm_mem *node) |
2e2cfbe6 BS |
172 | { |
173 | if (node->sg) | |
42594600 | 174 | nvkm_vm_map_sg_table(vma, 0, node->size << 12, node); |
2e2cfbe6 BS |
175 | else |
176 | if (node->pages) | |
42594600 | 177 | nvkm_vm_map_sg(vma, 0, node->size << 12, node); |
2e2cfbe6 | 178 | else |
42594600 | 179 | nvkm_vm_map_at(vma, 0, node); |
2e2cfbe6 BS |
180 | } |
181 | ||
a11c3198 | 182 | void |
42594600 | 183 | nvkm_vm_unmap_at(struct nvkm_vma *vma, u64 delta, u64 length) |
a11c3198 | 184 | { |
42594600 BS |
185 | struct nvkm_vm *vm = vma->vm; |
186 | struct nvkm_mmu *mmu = vm->mmu; | |
c9582455 | 187 | int big = vma->node->type != mmu->func->spg_shift; |
a11c3198 BS |
188 | u32 offset = vma->node->offset + (delta >> 12); |
189 | u32 bits = vma->node->type - 12; | |
190 | u32 num = length >> vma->node->type; | |
c9582455 BS |
191 | u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde; |
192 | u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits; | |
193 | u32 max = 1 << (mmu->func->pgt_bits - bits); | |
a11c3198 BS |
194 | u32 end, len; |
195 | ||
196 | while (num) { | |
d0659d32 | 197 | struct nvkm_memory *pgt = vm->pgt[pde].mem[big]; |
a11c3198 BS |
198 | |
199 | end = (pte + num); | |
200 | if (unlikely(end >= max)) | |
201 | end = max; | |
202 | len = end - pte; | |
203 | ||
c9582455 | 204 | mmu->func->unmap(vma, pgt, pte, len); |
a11c3198 BS |
205 | |
206 | num -= len; | |
207 | pte += len; | |
208 | if (unlikely(end >= max)) { | |
209 | pde++; | |
210 | pte = 0; | |
211 | } | |
212 | } | |
213 | ||
c9582455 | 214 | mmu->func->flush(vm); |
a11c3198 BS |
215 | } |
216 | ||
217 | void | |
42594600 | 218 | nvkm_vm_unmap(struct nvkm_vma *vma) |
a11c3198 | 219 | { |
42594600 | 220 | nvkm_vm_unmap_at(vma, 0, (u64)vma->node->length << 12); |
a11c3198 BS |
221 | } |
222 | ||
223 | static void | |
42594600 | 224 | nvkm_vm_unmap_pgt(struct nvkm_vm *vm, int big, u32 fpde, u32 lpde) |
a11c3198 | 225 | { |
42594600 BS |
226 | struct nvkm_mmu *mmu = vm->mmu; |
227 | struct nvkm_vm_pgd *vpgd; | |
228 | struct nvkm_vm_pgt *vpgt; | |
d0659d32 | 229 | struct nvkm_memory *pgt; |
a11c3198 BS |
230 | u32 pde; |
231 | ||
232 | for (pde = fpde; pde <= lpde; pde++) { | |
233 | vpgt = &vm->pgt[pde - vm->fpde]; | |
3ee01281 | 234 | if (--vpgt->refcount[big]) |
a11c3198 BS |
235 | continue; |
236 | ||
d0659d32 BS |
237 | pgt = vpgt->mem[big]; |
238 | vpgt->mem[big] = NULL; | |
3ee01281 | 239 | |
a11c3198 | 240 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
c9582455 | 241 | mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem); |
a11c3198 BS |
242 | } |
243 | ||
77913bbc BS |
244 | mmu->func->flush(vm); |
245 | ||
997a8900 | 246 | nvkm_memory_unref(&pgt); |
a11c3198 BS |
247 | } |
248 | } | |
249 | ||
250 | static int | |
42594600 | 251 | nvkm_vm_map_pgt(struct nvkm_vm *vm, u32 pde, u32 type) |
a11c3198 | 252 | { |
42594600 BS |
253 | struct nvkm_mmu *mmu = vm->mmu; |
254 | struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; | |
255 | struct nvkm_vm_pgd *vpgd; | |
c9582455 | 256 | int big = (type != mmu->func->spg_shift); |
a11c3198 BS |
257 | u32 pgt_size; |
258 | int ret; | |
259 | ||
c9582455 | 260 | pgt_size = (1 << (mmu->func->pgt_bits + 12)) >> type; |
a11c3198 BS |
261 | pgt_size *= 8; |
262 | ||
d0659d32 BS |
263 | ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST, |
264 | pgt_size, 0x1000, true, &vpgt->mem[big]); | |
a11c3198 BS |
265 | if (unlikely(ret)) |
266 | return ret; | |
267 | ||
a11c3198 | 268 | list_for_each_entry(vpgd, &vm->pgd_list, head) { |
c9582455 | 269 | mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem); |
a11c3198 BS |
270 | } |
271 | ||
1de68568 | 272 | vpgt->refcount[big]++; |
a11c3198 BS |
273 | return 0; |
274 | } | |
275 | ||
276 | int | |
42594600 BS |
277 | nvkm_vm_get(struct nvkm_vm *vm, u64 size, u32 page_shift, u32 access, |
278 | struct nvkm_vma *vma) | |
a11c3198 | 279 | { |
42594600 | 280 | struct nvkm_mmu *mmu = vm->mmu; |
a11c3198 BS |
281 | u32 align = (1 << page_shift) >> 12; |
282 | u32 msize = size >> 12; | |
283 | u32 fpde, lpde, pde; | |
284 | int ret; | |
285 | ||
1de68568 | 286 | mutex_lock(&vm->mutex); |
42594600 BS |
287 | ret = nvkm_mm_head(&vm->mm, 0, page_shift, msize, msize, align, |
288 | &vma->node); | |
a11c3198 | 289 | if (unlikely(ret != 0)) { |
1de68568 | 290 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
291 | return ret; |
292 | } | |
293 | ||
c9582455 BS |
294 | fpde = (vma->node->offset >> mmu->func->pgt_bits); |
295 | lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits; | |
ebb945a9 | 296 | |
a11c3198 | 297 | for (pde = fpde; pde <= lpde; pde++) { |
42594600 | 298 | struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde]; |
c9582455 | 299 | int big = (vma->node->type != mmu->func->spg_shift); |
a11c3198 | 300 | |
3ee01281 BS |
301 | if (likely(vpgt->refcount[big])) { |
302 | vpgt->refcount[big]++; | |
a11c3198 BS |
303 | continue; |
304 | } | |
305 | ||
42594600 | 306 | ret = nvkm_vm_map_pgt(vm, pde, vma->node->type); |
a11c3198 BS |
307 | if (ret) { |
308 | if (pde != fpde) | |
42594600 BS |
309 | nvkm_vm_unmap_pgt(vm, big, fpde, pde - 1); |
310 | nvkm_mm_free(&vm->mm, &vma->node); | |
1de68568 | 311 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
312 | return ret; |
313 | } | |
314 | } | |
1de68568 | 315 | mutex_unlock(&vm->mutex); |
a11c3198 | 316 | |
780194b1 | 317 | vma->vm = NULL; |
42594600 | 318 | nvkm_vm_ref(vm, &vma->vm, NULL); |
a11c3198 BS |
319 | vma->offset = (u64)vma->node->offset << 12; |
320 | vma->access = access; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | void | |
42594600 | 325 | nvkm_vm_put(struct nvkm_vma *vma) |
a11c3198 | 326 | { |
227c95d9 BS |
327 | struct nvkm_mmu *mmu; |
328 | struct nvkm_vm *vm; | |
a11c3198 BS |
329 | u32 fpde, lpde; |
330 | ||
331 | if (unlikely(vma->node == NULL)) | |
332 | return; | |
227c95d9 BS |
333 | vm = vma->vm; |
334 | mmu = vm->mmu; | |
335 | ||
c9582455 BS |
336 | fpde = (vma->node->offset >> mmu->func->pgt_bits); |
337 | lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits; | |
a11c3198 | 338 | |
1de68568 | 339 | mutex_lock(&vm->mutex); |
c9582455 | 340 | nvkm_vm_unmap_pgt(vm, vma->node->type != mmu->func->spg_shift, fpde, lpde); |
42594600 | 341 | nvkm_mm_free(&vm->mm, &vma->node); |
1de68568 | 342 | mutex_unlock(&vm->mutex); |
780194b1 | 343 | |
42594600 | 344 | nvkm_vm_ref(NULL, &vma->vm, NULL); |
a11c3198 BS |
345 | } |
346 | ||
d8e83994 BS |
347 | int |
348 | nvkm_vm_boot(struct nvkm_vm *vm, u64 size) | |
349 | { | |
350 | struct nvkm_mmu *mmu = vm->mmu; | |
d0659d32 | 351 | struct nvkm_memory *pgt; |
d8e83994 BS |
352 | int ret; |
353 | ||
d0659d32 | 354 | ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST, |
c9582455 | 355 | (size >> mmu->func->spg_shift) * 8, 0x1000, true, &pgt); |
d8e83994 BS |
356 | if (ret == 0) { |
357 | vm->pgt[0].refcount[0] = 1; | |
d0659d32 BS |
358 | vm->pgt[0].mem[0] = pgt; |
359 | nvkm_memory_boot(pgt, vm); | |
5e075fde | 360 | vm->bootstrapped = true; |
d8e83994 BS |
361 | } |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
a11c3198 | 366 | int |
42594600 | 367 | nvkm_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset, |
1de68568 | 368 | u32 block, struct lock_class_key *key, struct nvkm_vm **pvm) |
a11c3198 | 369 | { |
1de68568 | 370 | static struct lock_class_key _key; |
42594600 | 371 | struct nvkm_vm *vm; |
a11c3198 | 372 | u64 mm_length = (offset + length) - mm_offset; |
a11c3198 BS |
373 | int ret; |
374 | ||
cfd376b6 | 375 | vm = kzalloc(sizeof(*vm), GFP_KERNEL); |
a11c3198 BS |
376 | if (!vm) |
377 | return -ENOMEM; | |
378 | ||
1de68568 | 379 | __mutex_init(&vm->mutex, "&vm->mutex", key ? key : &_key); |
3863c9bc | 380 | INIT_LIST_HEAD(&vm->pgd_list); |
5ce3bf3c | 381 | vm->mmu = mmu; |
e0bacd2f | 382 | kref_init(&vm->refcount); |
c9582455 BS |
383 | vm->fpde = offset >> (mmu->func->pgt_bits + 12); |
384 | vm->lpde = (offset + length - 1) >> (mmu->func->pgt_bits + 12); | |
a11c3198 | 385 | |
d005f51e | 386 | vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt)); |
a11c3198 BS |
387 | if (!vm->pgt) { |
388 | kfree(vm); | |
389 | return -ENOMEM; | |
390 | } | |
391 | ||
4d058fab | 392 | ret = nvkm_mm_init(&vm->mm, 0, mm_offset >> 12, mm_length >> 12, |
42594600 | 393 | block >> 12); |
a11c3198 | 394 | if (ret) { |
d005f51e | 395 | vfree(vm->pgt); |
a11c3198 BS |
396 | kfree(vm); |
397 | return ret; | |
398 | } | |
399 | ||
cfd376b6 MS |
400 | *pvm = vm; |
401 | ||
a11c3198 BS |
402 | return 0; |
403 | } | |
404 | ||
3863c9bc | 405 | int |
42594600 | 406 | nvkm_vm_new(struct nvkm_device *device, u64 offset, u64 length, u64 mm_offset, |
1de68568 | 407 | struct lock_class_key *key, struct nvkm_vm **pvm) |
3863c9bc | 408 | { |
c9582455 BS |
409 | struct nvkm_mmu *mmu = device->mmu; |
410 | if (!mmu->func->create) | |
411 | return -EINVAL; | |
412 | return mmu->func->create(mmu, offset, length, mm_offset, key, pvm); | |
3863c9bc BS |
413 | } |
414 | ||
a11c3198 | 415 | static int |
42594600 | 416 | nvkm_vm_link(struct nvkm_vm *vm, struct nvkm_gpuobj *pgd) |
a11c3198 | 417 | { |
42594600 BS |
418 | struct nvkm_mmu *mmu = vm->mmu; |
419 | struct nvkm_vm_pgd *vpgd; | |
a11c3198 BS |
420 | int i; |
421 | ||
422 | if (!pgd) | |
423 | return 0; | |
424 | ||
425 | vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL); | |
426 | if (!vpgd) | |
427 | return -ENOMEM; | |
428 | ||
f027f491 | 429 | vpgd->obj = pgd; |
a11c3198 | 430 | |
1de68568 | 431 | mutex_lock(&vm->mutex); |
3ee01281 | 432 | for (i = vm->fpde; i <= vm->lpde; i++) |
c9582455 | 433 | mmu->func->map_pgt(pgd, i, vm->pgt[i - vm->fpde].mem); |
a11c3198 | 434 | list_add(&vpgd->head, &vm->pgd_list); |
1de68568 | 435 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
436 | return 0; |
437 | } | |
438 | ||
439 | static void | |
42594600 | 440 | nvkm_vm_unlink(struct nvkm_vm *vm, struct nvkm_gpuobj *mpgd) |
a11c3198 | 441 | { |
42594600 | 442 | struct nvkm_vm_pgd *vpgd, *tmp; |
a11c3198 | 443 | |
15ba79ad | 444 | if (!mpgd) |
a11c3198 BS |
445 | return; |
446 | ||
1de68568 | 447 | mutex_lock(&vm->mutex); |
a11c3198 | 448 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { |
15ba79ad | 449 | if (vpgd->obj == mpgd) { |
15ba79ad BS |
450 | list_del(&vpgd->head); |
451 | kfree(vpgd); | |
452 | break; | |
453 | } | |
a11c3198 | 454 | } |
1de68568 | 455 | mutex_unlock(&vm->mutex); |
a11c3198 BS |
456 | } |
457 | ||
458 | static void | |
42594600 | 459 | nvkm_vm_del(struct kref *kref) |
a11c3198 | 460 | { |
42594600 BS |
461 | struct nvkm_vm *vm = container_of(kref, typeof(*vm), refcount); |
462 | struct nvkm_vm_pgd *vpgd, *tmp; | |
a11c3198 BS |
463 | |
464 | list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) { | |
42594600 | 465 | nvkm_vm_unlink(vm, vpgd->obj); |
a11c3198 | 466 | } |
a11c3198 | 467 | |
42594600 | 468 | nvkm_mm_fini(&vm->mm); |
d005f51e | 469 | vfree(vm->pgt); |
a11c3198 BS |
470 | kfree(vm); |
471 | } | |
472 | ||
473 | int | |
42594600 | 474 | nvkm_vm_ref(struct nvkm_vm *ref, struct nvkm_vm **ptr, struct nvkm_gpuobj *pgd) |
a11c3198 | 475 | { |
e0bacd2f | 476 | if (ref) { |
42594600 | 477 | int ret = nvkm_vm_link(ref, pgd); |
a11c3198 BS |
478 | if (ret) |
479 | return ret; | |
480 | ||
e0bacd2f | 481 | kref_get(&ref->refcount); |
a11c3198 BS |
482 | } |
483 | ||
e0bacd2f | 484 | if (*ptr) { |
5e075fde BS |
485 | if ((*ptr)->bootstrapped && pgd) |
486 | nvkm_memory_unref(&(*ptr)->pgt[0].mem[0]); | |
42594600 BS |
487 | nvkm_vm_unlink(*ptr, pgd); |
488 | kref_put(&(*ptr)->refcount, nvkm_vm_del); | |
a11c3198 BS |
489 | } |
490 | ||
e0bacd2f | 491 | *ptr = ref; |
a11c3198 BS |
492 | return 0; |
493 | } | |
c9582455 BS |
494 | |
495 | static int | |
496 | nvkm_mmu_oneinit(struct nvkm_subdev *subdev) | |
497 | { | |
498 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
499 | if (mmu->func->oneinit) | |
500 | return mmu->func->oneinit(mmu); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static int | |
505 | nvkm_mmu_init(struct nvkm_subdev *subdev) | |
506 | { | |
507 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
508 | if (mmu->func->init) | |
509 | mmu->func->init(mmu); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static void * | |
514 | nvkm_mmu_dtor(struct nvkm_subdev *subdev) | |
515 | { | |
516 | struct nvkm_mmu *mmu = nvkm_mmu(subdev); | |
517 | if (mmu->func->dtor) | |
518 | return mmu->func->dtor(mmu); | |
519 | return mmu; | |
520 | } | |
521 | ||
522 | static const struct nvkm_subdev_func | |
523 | nvkm_mmu = { | |
524 | .dtor = nvkm_mmu_dtor, | |
525 | .oneinit = nvkm_mmu_oneinit, | |
526 | .init = nvkm_mmu_init, | |
527 | }; | |
528 | ||
529 | void | |
530 | nvkm_mmu_ctor(const struct nvkm_mmu_func *func, struct nvkm_device *device, | |
531 | int index, struct nvkm_mmu *mmu) | |
532 | { | |
56d06fa2 | 533 | nvkm_subdev_ctor(&nvkm_mmu, device, index, &mmu->subdev); |
c9582455 BS |
534 | mmu->func = func; |
535 | mmu->limit = func->limit; | |
536 | mmu->dma_bits = func->dma_bits; | |
537 | mmu->lpg_shift = func->lpg_shift; | |
538 | } | |
539 | ||
540 | int | |
541 | nvkm_mmu_new_(const struct nvkm_mmu_func *func, struct nvkm_device *device, | |
542 | int index, struct nvkm_mmu **pmmu) | |
543 | { | |
544 | if (!(*pmmu = kzalloc(sizeof(**pmmu), GFP_KERNEL))) | |
545 | return -ENOMEM; | |
546 | nvkm_mmu_ctor(func, device, index, *pmmu); | |
547 | return 0; | |
548 | } |