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_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 struct nvkm_client *client = uvmm->object.client;
49 union {
50 struct nvif_vmm_pfnclr_v0 v0;
51 } *args = argv;
52 struct nvkm_vmm *vmm = uvmm->vmm;
53 int ret = -ENOSYS;
54 u64 addr, size;
55
56 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
57 addr = args->v0.addr;
58 size = args->v0.size;
59 } else
60 return ret;
61
62 if (!client->super)
63 return -ENOENT;
64
65 if (size) {
66 mutex_lock(&vmm->mutex);
67 ret = nvkm_vmm_pfn_unmap(vmm, addr, size);
68 mutex_unlock(&vmm->mutex);
69 }
70
71 return ret;
72 }
73
74 static int
nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)75 nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
76 {
77 struct nvkm_client *client = uvmm->object.client;
78 union {
79 struct nvif_vmm_pfnmap_v0 v0;
80 } *args = argv;
81 struct nvkm_vmm *vmm = uvmm->vmm;
82 int ret = -ENOSYS;
83 u64 addr, size, *phys;
84 u8 page;
85
86 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
87 page = args->v0.page;
88 addr = args->v0.addr;
89 size = args->v0.size;
90 phys = args->v0.phys;
91 if (argc != (size >> page) * sizeof(args->v0.phys[0]))
92 return -EINVAL;
93 } else
94 return ret;
95
96 if (!client->super)
97 return -ENOENT;
98
99 if (size) {
100 mutex_lock(&vmm->mutex);
101 ret = nvkm_vmm_pfn_map(vmm, page, addr, size, phys);
102 mutex_unlock(&vmm->mutex);
103 }
104
105 return ret;
106 }
107
108 static int
nvkm_uvmm_mthd_unmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)109 nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
110 {
111 struct nvkm_client *client = uvmm->object.client;
112 union {
113 struct nvif_vmm_unmap_v0 v0;
114 } *args = argv;
115 struct nvkm_vmm *vmm = uvmm->vmm;
116 struct nvkm_vma *vma;
117 int ret = -ENOSYS;
118 u64 addr;
119
120 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
121 addr = args->v0.addr;
122 } else
123 return ret;
124
125 mutex_lock(&vmm->mutex);
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->user && !client->super) || vma->busy) {
134 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
135 vma->user, !client->super, vma->busy);
136 goto done;
137 }
138
139 if (ret = -EINVAL, !vma->memory) {
140 VMM_DEBUG(vmm, "unmapped");
141 goto done;
142 }
143
144 nvkm_vmm_unmap_locked(vmm, vma, false);
145 ret = 0;
146 done:
147 mutex_unlock(&vmm->mutex);
148 return ret;
149 }
150
151 static int
nvkm_uvmm_mthd_map(struct nvkm_uvmm * uvmm,void * argv,u32 argc)152 nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
153 {
154 struct nvkm_client *client = uvmm->object.client;
155 union {
156 struct nvif_vmm_map_v0 v0;
157 } *args = argv;
158 u64 addr, size, handle, offset;
159 struct nvkm_vmm *vmm = uvmm->vmm;
160 struct nvkm_vma *vma;
161 struct nvkm_memory *memory;
162 int ret = -ENOSYS;
163
164 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
165 addr = args->v0.addr;
166 size = args->v0.size;
167 handle = args->v0.memory;
168 offset = args->v0.offset;
169 } else
170 return ret;
171
172 memory = nvkm_umem_search(client, handle);
173 if (IS_ERR(memory)) {
174 VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
175 return PTR_ERR(memory);
176 }
177
178 mutex_lock(&vmm->mutex);
179 if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
180 VMM_DEBUG(vmm, "lookup %016llx", addr);
181 goto fail;
182 }
183
184 if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
185 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
186 vma->user, !client->super, vma->busy);
187 goto fail;
188 }
189
190 if (ret = -EINVAL, vma->mapped && !vma->memory) {
191 VMM_DEBUG(vmm, "pfnmap %016llx", addr);
192 goto fail;
193 }
194
195 if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
196 if (addr + size > vma->addr + vma->size || vma->memory ||
197 (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
198 VMM_DEBUG(vmm, "split %d %d %d "
199 "%016llx %016llx %016llx %016llx",
200 !!vma->memory, vma->refd, vma->mapref,
201 addr, size, vma->addr, (u64)vma->size);
202 goto fail;
203 }
204
205 vma = nvkm_vmm_node_split(vmm, vma, addr, size);
206 if (!vma) {
207 ret = -ENOMEM;
208 goto fail;
209 }
210 }
211 vma->busy = true;
212 mutex_unlock(&vmm->mutex);
213
214 ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
215 if (ret == 0) {
216 /* Successful map will clear vma->busy. */
217 nvkm_memory_unref(&memory);
218 return 0;
219 }
220
221 mutex_lock(&vmm->mutex);
222 vma->busy = false;
223 nvkm_vmm_unmap_region(vmm, vma);
224 fail:
225 mutex_unlock(&vmm->mutex);
226 nvkm_memory_unref(&memory);
227 return ret;
228 }
229
230 static int
nvkm_uvmm_mthd_put(struct nvkm_uvmm * uvmm,void * argv,u32 argc)231 nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
232 {
233 struct nvkm_client *client = uvmm->object.client;
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);
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->user && !client->super) || vma->busy) {
256 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
257 vma->user, !client->super, vma->busy);
258 goto done;
259 }
260
261 nvkm_vmm_put_locked(vmm, vma);
262 ret = 0;
263 done:
264 mutex_unlock(&vmm->mutex);
265 return ret;
266 }
267
268 static int
nvkm_uvmm_mthd_get(struct nvkm_uvmm * uvmm,void * argv,u32 argc)269 nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
270 {
271 struct nvkm_client *client = uvmm->object.client;
272 union {
273 struct nvif_vmm_get_v0 v0;
274 } *args = argv;
275 struct nvkm_vmm *vmm = uvmm->vmm;
276 struct nvkm_vma *vma;
277 int ret = -ENOSYS;
278 bool getref, mapref, sparse;
279 u8 page, align;
280 u64 size;
281
282 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
283 getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
284 mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
285 sparse = args->v0.sparse;
286 page = args->v0.page;
287 align = args->v0.align;
288 size = args->v0.size;
289 } else
290 return ret;
291
292 mutex_lock(&vmm->mutex);
293 ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
294 page, align, size, &vma);
295 mutex_unlock(&vmm->mutex);
296 if (ret)
297 return ret;
298
299 args->v0.addr = vma->addr;
300 vma->user = !client->super;
301 return ret;
302 }
303
304 static int
nvkm_uvmm_mthd_page(struct nvkm_uvmm * uvmm,void * argv,u32 argc)305 nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
306 {
307 union {
308 struct nvif_vmm_page_v0 v0;
309 } *args = argv;
310 const struct nvkm_vmm_page *page;
311 int ret = -ENOSYS;
312 u8 type, index, nr;
313
314 page = uvmm->vmm->func->page;
315 for (nr = 0; page[nr].shift; nr++);
316
317 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
318 if ((index = args->v0.index) >= nr)
319 return -EINVAL;
320 type = page[index].type;
321 args->v0.shift = page[index].shift;
322 args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
323 args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
324 args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
325 args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
326 } else
327 return -ENOSYS;
328
329 return 0;
330 }
331
332 static int
nvkm_uvmm_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)333 nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
334 {
335 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
336 switch (mthd) {
337 case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
338 case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
339 case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
340 case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
341 case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
342 case NVIF_VMM_V0_PFNMAP: return nvkm_uvmm_mthd_pfnmap(uvmm, argv, argc);
343 case NVIF_VMM_V0_PFNCLR: return nvkm_uvmm_mthd_pfnclr(uvmm, argv, argc);
344 case NVIF_VMM_V0_MTHD(0x00) ... NVIF_VMM_V0_MTHD(0x7f):
345 if (uvmm->vmm->func->mthd) {
346 return uvmm->vmm->func->mthd(uvmm->vmm,
347 uvmm->object.client,
348 mthd, argv, argc);
349 }
350 break;
351 default:
352 break;
353 }
354 return -EINVAL;
355 }
356
357 static void *
nvkm_uvmm_dtor(struct nvkm_object * object)358 nvkm_uvmm_dtor(struct nvkm_object *object)
359 {
360 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
361 nvkm_vmm_unref(&uvmm->vmm);
362 return uvmm;
363 }
364
365 static const struct nvkm_object_func
366 nvkm_uvmm = {
367 .dtor = nvkm_uvmm_dtor,
368 .mthd = nvkm_uvmm_mthd,
369 };
370
371 int
nvkm_uvmm_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)372 nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
373 struct nvkm_object **pobject)
374 {
375 struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
376 const bool more = oclass->base.maxver >= 0;
377 union {
378 struct nvif_vmm_v0 v0;
379 } *args = argv;
380 const struct nvkm_vmm_page *page;
381 struct nvkm_uvmm *uvmm;
382 int ret = -ENOSYS;
383 u64 addr, size;
384 bool managed;
385
386 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
387 managed = args->v0.managed != 0;
388 addr = args->v0.addr;
389 size = args->v0.size;
390 } else
391 return ret;
392
393 if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
394 return -ENOMEM;
395 nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
396 *pobject = &uvmm->object;
397
398 if (!mmu->vmm) {
399 ret = mmu->func->vmm.ctor(mmu, managed, addr, size, argv, argc,
400 NULL, "user", &uvmm->vmm);
401 if (ret)
402 return ret;
403
404 uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
405 } else {
406 if (size)
407 return -EINVAL;
408
409 uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
410 }
411
412 page = uvmm->vmm->func->page;
413 args->v0.page_nr = 0;
414 while (page && (page++)->shift)
415 args->v0.page_nr++;
416 args->v0.addr = uvmm->vmm->start;
417 args->v0.size = uvmm->vmm->limit;
418 return 0;
419 }
420
