1 /*
2 * Copyright 2017 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 #include "uvmm.h"
23 #include "umem.h"
24 #include "ummu.h"
25
26 #include <core/client.h>
27 #include <core/memory.h>
28
29 #include <nvif/if000c.h>
30 #include <nvif/unpack.h>
31
32 static const struct nvkm_object_func nvkm_uvmm;
33 struct nvkm_vmm *
nvkm_uvmm_search(struct nvkm_client * client,u64 handle)34 nvkm_uvmm_search(struct nvkm_client *client, u64 handle)
35 {
36 struct nvkm_object *object;
37
38 object = nvkm_object_search(client, handle, &nvkm_uvmm);
39 if (IS_ERR(object))
40 return (void *)object;
41
42 return nvkm_vmm_ref(nvkm_uvmm(object)->vmm);
43 }
44
45 static int
nvkm_uvmm_mthd_pfnclr(struct nvkm_uvmm * uvmm,void * argv,u32 argc)46 nvkm_uvmm_mthd_pfnclr(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
47 {
48 union {
49 struct nvif_vmm_pfnclr_v0 v0;
50 } *args = argv;
51 struct nvkm_vmm *vmm = uvmm->vmm;
52 int ret = -ENOSYS;
53 u64 addr, size;
54
55 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
56 addr = args->v0.addr;
57 size = args->v0.size;
58 } else
59 return ret;
60
61 if (nvkm_vmm_in_managed_range(vmm, addr, size) && vmm->managed.raw)
62 return -EINVAL;
63
64 if (size) {
65 mutex_lock(&vmm->mutex.vmm);
66 ret = nvkm_vmm_pfn_unmap(vmm, addr, size);
67 mutex_unlock(&vmm->mutex.vmm);
68 }
69
70 return ret;
71 }
72
73 static int
nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)74 nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
75 {
76 union {
77 struct nvif_vmm_pfnmap_v0 v0;
78 } *args = argv;
79 struct nvkm_vmm *vmm = uvmm->vmm;
80 int ret = -ENOSYS;
81 u64 addr, size, *phys;
82 u8 page;
83
84 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
85 page = args->v0.page;
86 addr = args->v0.addr;
87 size = args->v0.size;
88 phys = args->v0.phys;
89 if (argc != (size >> page) * sizeof(args->v0.phys[0]))
90 return -EINVAL;
91 } else
92 return ret;
93
94 if (nvkm_vmm_in_managed_range(vmm, addr, size) && vmm->managed.raw)
95 return -EINVAL;
96
97 if (size) {
98 mutex_lock(&vmm->mutex.vmm);
99 ret = nvkm_vmm_pfn_map(vmm, page, addr, size, phys);
100 mutex_unlock(&vmm->mutex.vmm);
101 }
102
103 return ret;
104 }
105
106 static int
nvkm_uvmm_mthd_unmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)107 nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
108 {
109 union {
110 struct nvif_vmm_unmap_v0 v0;
111 } *args = argv;
112 struct nvkm_vmm *vmm = uvmm->vmm;
113 struct nvkm_vma *vma;
114 int ret = -ENOSYS;
115 u64 addr;
116
117 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
118 addr = args->v0.addr;
119 } else
120 return ret;
121
122 if (nvkm_vmm_in_managed_range(vmm, addr, 0) && vmm->managed.raw)
123 return -EINVAL;
124
125 mutex_lock(&vmm->mutex.vmm);
126 vma = nvkm_vmm_node_search(vmm, addr);
127 if (ret = -ENOENT, !vma || vma->addr != addr) {
128 VMM_DEBUG(vmm, "lookup %016llx: %016llx",
129 addr, vma ? vma->addr : ~0ULL);
130 goto done;
131 }
132
133 if (ret = -ENOENT, vma->busy) {
134 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
135 goto done;
136 }
137
138 if (ret = -EINVAL, !vma->memory) {
139 VMM_DEBUG(vmm, "unmapped");
140 goto done;
141 }
142
143 nvkm_vmm_unmap_locked(vmm, vma, false);
144 ret = 0;
145 done:
146 mutex_unlock(&vmm->mutex.vmm);
147 return ret;
148 }
149
150 static int
nvkm_uvmm_mthd_map(struct nvkm_uvmm * uvmm,void * argv,u32 argc)151 nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
152 {
153 struct nvkm_client *client = uvmm->object.client;
154 union {
155 struct nvif_vmm_map_v0 v0;
156 } *args = argv;
157 u64 addr, size, handle, offset;
158 struct nvkm_vmm *vmm = uvmm->vmm;
159 struct nvkm_vma *vma;
160 struct nvkm_memory *memory;
161 int ret = -ENOSYS;
162
163 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
164 addr = args->v0.addr;
165 size = args->v0.size;
166 handle = args->v0.memory;
167 offset = args->v0.offset;
168 } else
169 return ret;
170
171 if (nvkm_vmm_in_managed_range(vmm, addr, size) && vmm->managed.raw)
172 return -EINVAL;
173
174 memory = nvkm_umem_search(client, handle);
175 if (IS_ERR(memory)) {
176 VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
177 return PTR_ERR(memory);
178 }
179
180 mutex_lock(&vmm->mutex.vmm);
181 if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
182 VMM_DEBUG(vmm, "lookup %016llx", addr);
183 goto fail;
184 }
185
186 if (ret = -ENOENT, vma->busy) {
187 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
188 goto fail;
189 }
190
191 if (ret = -EINVAL, vma->mapped && !vma->memory) {
192 VMM_DEBUG(vmm, "pfnmap %016llx", addr);
193 goto fail;
194 }
195
196 if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
197 if (addr + size > vma->addr + vma->size || vma->memory ||
198 (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
199 VMM_DEBUG(vmm, "split %d %d %d "
200 "%016llx %016llx %016llx %016llx",
201 !!vma->memory, vma->refd, vma->mapref,
202 addr, size, vma->addr, (u64)vma->size);
203 goto fail;
204 }
205
206 vma = nvkm_vmm_node_split(vmm, vma, addr, size);
207 if (!vma) {
208 ret = -ENOMEM;
209 goto fail;
210 }
211 }
212 vma->busy = true;
213 mutex_unlock(&vmm->mutex.vmm);
214
215 ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
216 if (ret == 0) {
217 /* Successful map will clear vma->busy. */
218 nvkm_memory_unref(&memory);
219 return 0;
220 }
221
222 mutex_lock(&vmm->mutex.vmm);
223 vma->busy = false;
224 nvkm_vmm_unmap_region(vmm, vma);
225 fail:
226 mutex_unlock(&vmm->mutex.vmm);
227 nvkm_memory_unref(&memory);
228 return ret;
229 }
230
231 static int
nvkm_uvmm_mthd_put(struct nvkm_uvmm * uvmm,void * argv,u32 argc)232 nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
233 {
234 union {
235 struct nvif_vmm_put_v0 v0;
236 } *args = argv;
237 struct nvkm_vmm *vmm = uvmm->vmm;
238 struct nvkm_vma *vma;
239 int ret = -ENOSYS;
240 u64 addr;
241
242 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
243 addr = args->v0.addr;
244 } else
245 return ret;
246
247 mutex_lock(&vmm->mutex.vmm);
248 vma = nvkm_vmm_node_search(vmm, args->v0.addr);
249 if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
250 VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
251 vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
252 goto done;
253 }
254
255 if (ret = -ENOENT, vma->busy) {
256 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
257 goto done;
258 }
259
260 nvkm_vmm_put_locked(vmm, vma);
261 ret = 0;
262 done:
263 mutex_unlock(&vmm->mutex.vmm);
264 return ret;
265 }
266
267 static int
nvkm_uvmm_mthd_get(struct nvkm_uvmm * uvmm,void * argv,u32 argc)268 nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
269 {
270 union {
271 struct nvif_vmm_get_v0 v0;
272 } *args = argv;
273 struct nvkm_vmm *vmm = uvmm->vmm;
274 struct nvkm_vma *vma;
275 int ret = -ENOSYS;
276 bool getref, mapref, sparse;
277 u8 page, align;
278 u64 size;
279
280 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
281 getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
282 mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
283 sparse = args->v0.sparse;
284 page = args->v0.page;
285 align = args->v0.align;
286 size = args->v0.size;
287 } else
288 return ret;
289
290 mutex_lock(&vmm->mutex.vmm);
291 ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
292 page, align, size, &vma);
293 mutex_unlock(&vmm->mutex.vmm);
294 if (ret)
295 return ret;
296
297 args->v0.addr = vma->addr;
298 return ret;
299 }
300
301 static int
nvkm_uvmm_mthd_page(struct nvkm_uvmm * uvmm,void * argv,u32 argc)302 nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
303 {
304 union {
305 struct nvif_vmm_page_v0 v0;
306 } *args = argv;
307 const struct nvkm_vmm_page *page;
308 int ret = -ENOSYS;
309 u8 type, index, nr;
310
311 page = uvmm->vmm->func->page;
312 for (nr = 0; page[nr].shift; nr++);
313
314 if (!(nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
315 if ((index = args->v0.index) >= nr)
316 return -EINVAL;
317 type = page[index].type;
318 args->v0.shift = page[index].shift;
319 args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
320 args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
321 args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
322 args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
323 } else
324 return -ENOSYS;
325
326 return 0;
327 }
328
329 static inline int
nvkm_uvmm_page_index(struct nvkm_uvmm * uvmm,u64 size,u8 shift,u8 * refd)330 nvkm_uvmm_page_index(struct nvkm_uvmm *uvmm, u64 size, u8 shift, u8 *refd)
331 {
332 struct nvkm_vmm *vmm = uvmm->vmm;
333 const struct nvkm_vmm_page *page;
334
335 if (likely(shift)) {
336 for (page = vmm->func->page; page->shift; page++) {
337 if (shift == page->shift)
338 break;
339 }
340
341 if (!page->shift || !IS_ALIGNED(size, 1ULL << page->shift)) {
342 VMM_DEBUG(vmm, "page %d %016llx", shift, size);
343 return -EINVAL;
344 }
345 } else {
346 return -EINVAL;
347 }
348 *refd = page - vmm->func->page;
349
350 return 0;
351 }
352
353 static int
nvkm_uvmm_mthd_raw_get(struct nvkm_uvmm * uvmm,struct nvif_vmm_raw_v0 * args)354 nvkm_uvmm_mthd_raw_get(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
355 {
356 struct nvkm_vmm *vmm = uvmm->vmm;
357 u8 refd;
358 int ret;
359
360 if (!nvkm_vmm_in_managed_range(vmm, args->addr, args->size))
361 return -EINVAL;
362
363 ret = nvkm_uvmm_page_index(uvmm, args->size, args->shift, &refd);
364 if (ret)
365 return ret;
366
367 return nvkm_vmm_raw_get(vmm, args->addr, args->size, refd);
368 }
369
370 static int
nvkm_uvmm_mthd_raw_put(struct nvkm_uvmm * uvmm,struct nvif_vmm_raw_v0 * args)371 nvkm_uvmm_mthd_raw_put(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
372 {
373 struct nvkm_vmm *vmm = uvmm->vmm;
374 u8 refd;
375 int ret;
376
377 if (!nvkm_vmm_in_managed_range(vmm, args->addr, args->size))
378 return -EINVAL;
379
380 ret = nvkm_uvmm_page_index(uvmm, args->size, args->shift, &refd);
381 if (ret)
382 return ret;
383
384 nvkm_vmm_raw_put(vmm, args->addr, args->size, refd);
385
386 return 0;
387 }
388
389 static int
nvkm_uvmm_mthd_raw_map(struct nvkm_uvmm * uvmm,struct nvif_vmm_raw_v0 * args)390 nvkm_uvmm_mthd_raw_map(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
391 {
392 struct nvkm_client *client = uvmm->object.client;
393 struct nvkm_vmm *vmm = uvmm->vmm;
394 struct nvkm_vma vma = {
395 .addr = args->addr,
396 .size = args->size,
397 .used = true,
398 .mapref = false,
399 .no_comp = true,
400 };
401 struct nvkm_memory *memory;
402 void *argv = (void *)(uintptr_t)args->argv;
403 unsigned int argc = args->argc;
404 u64 handle = args->memory;
405 u8 refd;
406 int ret;
407
408 if (!nvkm_vmm_in_managed_range(vmm, args->addr, args->size))
409 return -EINVAL;
410
411 ret = nvkm_uvmm_page_index(uvmm, args->size, args->shift, &refd);
412 if (ret)
413 return ret;
414
415 vma.page = vma.refd = refd;
416
417 memory = nvkm_umem_search(client, args->memory);
418 if (IS_ERR(memory)) {
419 VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
420 return PTR_ERR(memory);
421 }
422
423 ret = nvkm_memory_map(memory, args->offset, vmm, &vma, argv, argc);
424
425 nvkm_memory_unref(&vma.memory);
426 nvkm_memory_unref(&memory);
427 return ret;
428 }
429
430 static int
nvkm_uvmm_mthd_raw_unmap(struct nvkm_uvmm * uvmm,struct nvif_vmm_raw_v0 * args)431 nvkm_uvmm_mthd_raw_unmap(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
432 {
433 struct nvkm_vmm *vmm = uvmm->vmm;
434 u8 refd;
435 int ret;
436
437 if (!nvkm_vmm_in_managed_range(vmm, args->addr, args->size))
438 return -EINVAL;
439
440 ret = nvkm_uvmm_page_index(uvmm, args->size, args->shift, &refd);
441 if (ret)
442 return ret;
443
444 nvkm_vmm_raw_unmap(vmm, args->addr, args->size,
445 args->sparse, refd);
446
447 return 0;
448 }
449
450 static int
nvkm_uvmm_mthd_raw_sparse(struct nvkm_uvmm * uvmm,struct nvif_vmm_raw_v0 * args)451 nvkm_uvmm_mthd_raw_sparse(struct nvkm_uvmm *uvmm, struct nvif_vmm_raw_v0 *args)
452 {
453 struct nvkm_vmm *vmm = uvmm->vmm;
454
455 if (!nvkm_vmm_in_managed_range(vmm, args->addr, args->size))
456 return -EINVAL;
457
458 return nvkm_vmm_raw_sparse(vmm, args->addr, args->size, args->ref);
459 }
460
461 static int
nvkm_uvmm_mthd_raw(struct nvkm_uvmm * uvmm,void * argv,u32 argc)462 nvkm_uvmm_mthd_raw(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
463 {
464 union {
465 struct nvif_vmm_raw_v0 v0;
466 } *args = argv;
467 int ret = -ENOSYS;
468
469 if (!uvmm->vmm->managed.raw)
470 return -EINVAL;
471
472 if ((ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true)))
473 return ret;
474
475 switch (args->v0.op) {
476 case NVIF_VMM_RAW_V0_GET:
477 return nvkm_uvmm_mthd_raw_get(uvmm, &args->v0);
478 case NVIF_VMM_RAW_V0_PUT:
479 return nvkm_uvmm_mthd_raw_put(uvmm, &args->v0);
480 case NVIF_VMM_RAW_V0_MAP:
481 return nvkm_uvmm_mthd_raw_map(uvmm, &args->v0);
482 case NVIF_VMM_RAW_V0_UNMAP:
483 return nvkm_uvmm_mthd_raw_unmap(uvmm, &args->v0);
484 case NVIF_VMM_RAW_V0_SPARSE:
485 return nvkm_uvmm_mthd_raw_sparse(uvmm, &args->v0);
486 default:
487 return -EINVAL;
488 };
489 }
490
491 static int
nvkm_uvmm_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)492 nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
493 {
494 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
495 switch (mthd) {
496 case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
497 case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
498 case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
499 case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
500 case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
501 case NVIF_VMM_V0_PFNMAP: return nvkm_uvmm_mthd_pfnmap(uvmm, argv, argc);
502 case NVIF_VMM_V0_PFNCLR: return nvkm_uvmm_mthd_pfnclr(uvmm, argv, argc);
503 case NVIF_VMM_V0_RAW : return nvkm_uvmm_mthd_raw (uvmm, argv, argc);
504 case NVIF_VMM_V0_MTHD(0x00) ... NVIF_VMM_V0_MTHD(0x7f):
505 if (uvmm->vmm->func->mthd) {
506 return uvmm->vmm->func->mthd(uvmm->vmm,
507 uvmm->object.client,
508 mthd, argv, argc);
509 }
510 break;
511 default:
512 break;
513 }
514 return -EINVAL;
515 }
516
517 static void *
nvkm_uvmm_dtor(struct nvkm_object * object)518 nvkm_uvmm_dtor(struct nvkm_object *object)
519 {
520 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
521 nvkm_vmm_unref(&uvmm->vmm);
522 return uvmm;
523 }
524
525 static const struct nvkm_object_func
526 nvkm_uvmm = {
527 .dtor = nvkm_uvmm_dtor,
528 .mthd = nvkm_uvmm_mthd,
529 };
530
531 int
nvkm_uvmm_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)532 nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
533 struct nvkm_object **pobject)
534 {
535 struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
536 const bool more = oclass->base.maxver >= 0;
537 union {
538 struct nvif_vmm_v0 v0;
539 } *args = argv;
540 const struct nvkm_vmm_page *page;
541 struct nvkm_uvmm *uvmm;
542 int ret = -ENOSYS;
543 u64 addr, size;
544 bool managed, raw;
545
546 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
547 managed = args->v0.type == NVIF_VMM_V0_TYPE_MANAGED;
548 raw = args->v0.type == NVIF_VMM_V0_TYPE_RAW;
549 addr = args->v0.addr;
550 size = args->v0.size;
551 } else
552 return ret;
553
554 if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
555 return -ENOMEM;
556
557 nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
558 *pobject = &uvmm->object;
559
560 if (!mmu->vmm) {
561 ret = mmu->func->vmm.ctor(mmu, managed || raw, addr, size,
562 argv, argc, NULL, "user", &uvmm->vmm);
563 if (ret)
564 return ret;
565
566 uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
567 } else {
568 if (size)
569 return -EINVAL;
570
571 uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
572 }
573 uvmm->vmm->managed.raw = raw;
574
575 page = uvmm->vmm->func->page;
576 args->v0.page_nr = 0;
577 while (page && (page++)->shift)
578 args->v0.page_nr++;
579 args->v0.addr = uvmm->vmm->start;
580 args->v0.size = uvmm->vmm->limit;
581 return 0;
582 }
583