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 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 (size) {
62 mutex_lock(&vmm->mutex);
63 ret = nvkm_vmm_pfn_unmap(vmm, addr, size);
64 mutex_unlock(&vmm->mutex);
65 }
66
67 return ret;
68 }
69
70 static int
nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)71 nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
72 {
73 union {
74 struct nvif_vmm_pfnmap_v0 v0;
75 } *args = argv;
76 struct nvkm_vmm *vmm = uvmm->vmm;
77 int ret = -ENOSYS;
78 u64 addr, size, *phys;
79 u8 page;
80
81 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
82 page = args->v0.page;
83 addr = args->v0.addr;
84 size = args->v0.size;
85 phys = args->v0.phys;
86 if (argc != (size >> page) * sizeof(args->v0.phys[0]))
87 return -EINVAL;
88 } else
89 return ret;
90
91 if (size) {
92 mutex_lock(&vmm->mutex);
93 ret = nvkm_vmm_pfn_map(vmm, page, addr, size, phys);
94 mutex_unlock(&vmm->mutex);
95 }
96
97 return ret;
98 }
99
100 static int
nvkm_uvmm_mthd_unmap(struct nvkm_uvmm * uvmm,void * argv,u32 argc)101 nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
102 {
103 union {
104 struct nvif_vmm_unmap_v0 v0;
105 } *args = argv;
106 struct nvkm_vmm *vmm = uvmm->vmm;
107 struct nvkm_vma *vma;
108 int ret = -ENOSYS;
109 u64 addr;
110
111 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
112 addr = args->v0.addr;
113 } else
114 return ret;
115
116 mutex_lock(&vmm->mutex);
117 vma = nvkm_vmm_node_search(vmm, addr);
118 if (ret = -ENOENT, !vma || vma->addr != addr) {
119 VMM_DEBUG(vmm, "lookup %016llx: %016llx",
120 addr, vma ? vma->addr : ~0ULL);
121 goto done;
122 }
123
124 if (ret = -ENOENT, vma->busy) {
125 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
126 goto done;
127 }
128
129 if (ret = -EINVAL, !vma->memory) {
130 VMM_DEBUG(vmm, "unmapped");
131 goto done;
132 }
133
134 nvkm_vmm_unmap_locked(vmm, vma, false);
135 ret = 0;
136 done:
137 mutex_unlock(&vmm->mutex);
138 return ret;
139 }
140
141 static int
nvkm_uvmm_mthd_map(struct nvkm_uvmm * uvmm,void * argv,u32 argc)142 nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
143 {
144 struct nvkm_client *client = uvmm->object.client;
145 union {
146 struct nvif_vmm_map_v0 v0;
147 } *args = argv;
148 u64 addr, size, handle, offset;
149 struct nvkm_vmm *vmm = uvmm->vmm;
150 struct nvkm_vma *vma;
151 struct nvkm_memory *memory;
152 int ret = -ENOSYS;
153
154 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
155 addr = args->v0.addr;
156 size = args->v0.size;
157 handle = args->v0.memory;
158 offset = args->v0.offset;
159 } else
160 return ret;
161
162 memory = nvkm_umem_search(client, handle);
163 if (IS_ERR(memory)) {
164 VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
165 return PTR_ERR(memory);
166 }
167
168 mutex_lock(&vmm->mutex);
169 if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
170 VMM_DEBUG(vmm, "lookup %016llx", addr);
171 goto fail;
172 }
173
174 if (ret = -ENOENT, vma->busy) {
175 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
176 goto fail;
177 }
178
179 if (ret = -EINVAL, vma->mapped && !vma->memory) {
180 VMM_DEBUG(vmm, "pfnmap %016llx", addr);
181 goto fail;
182 }
183
184 if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
185 if (addr + size > vma->addr + vma->size || vma->memory ||
186 (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
187 VMM_DEBUG(vmm, "split %d %d %d "
188 "%016llx %016llx %016llx %016llx",
189 !!vma->memory, vma->refd, vma->mapref,
190 addr, size, vma->addr, (u64)vma->size);
191 goto fail;
192 }
193
194 vma = nvkm_vmm_node_split(vmm, vma, addr, size);
195 if (!vma) {
196 ret = -ENOMEM;
197 goto fail;
198 }
199 }
200 vma->busy = true;
201 mutex_unlock(&vmm->mutex);
202
203 ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
204 if (ret == 0) {
205 /* Successful map will clear vma->busy. */
206 nvkm_memory_unref(&memory);
207 return 0;
208 }
209
210 mutex_lock(&vmm->mutex);
211 vma->busy = false;
212 nvkm_vmm_unmap_region(vmm, vma);
213 fail:
214 mutex_unlock(&vmm->mutex);
215 nvkm_memory_unref(&memory);
216 return ret;
217 }
218
219 static int
nvkm_uvmm_mthd_put(struct nvkm_uvmm * uvmm,void * argv,u32 argc)220 nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
221 {
222 union {
223 struct nvif_vmm_put_v0 v0;
224 } *args = argv;
225 struct nvkm_vmm *vmm = uvmm->vmm;
226 struct nvkm_vma *vma;
227 int ret = -ENOSYS;
228 u64 addr;
229
230 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
231 addr = args->v0.addr;
232 } else
233 return ret;
234
235 mutex_lock(&vmm->mutex);
236 vma = nvkm_vmm_node_search(vmm, args->v0.addr);
237 if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
238 VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
239 vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
240 goto done;
241 }
242
243 if (ret = -ENOENT, vma->busy) {
244 VMM_DEBUG(vmm, "denied %016llx: %d", addr, vma->busy);
245 goto done;
246 }
247
248 nvkm_vmm_put_locked(vmm, vma);
249 ret = 0;
250 done:
251 mutex_unlock(&vmm->mutex);
252 return ret;
253 }
254
255 static int
nvkm_uvmm_mthd_get(struct nvkm_uvmm * uvmm,void * argv,u32 argc)256 nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
257 {
258 union {
259 struct nvif_vmm_get_v0 v0;
260 } *args = argv;
261 struct nvkm_vmm *vmm = uvmm->vmm;
262 struct nvkm_vma *vma;
263 int ret = -ENOSYS;
264 bool getref, mapref, sparse;
265 u8 page, align;
266 u64 size;
267
268 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
269 getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
270 mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
271 sparse = args->v0.sparse;
272 page = args->v0.page;
273 align = args->v0.align;
274 size = args->v0.size;
275 } else
276 return ret;
277
278 mutex_lock(&vmm->mutex);
279 ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
280 page, align, size, &vma);
281 mutex_unlock(&vmm->mutex);
282 if (ret)
283 return ret;
284
285 args->v0.addr = vma->addr;
286 return ret;
287 }
288
289 static int
nvkm_uvmm_mthd_page(struct nvkm_uvmm * uvmm,void * argv,u32 argc)290 nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
291 {
292 union {
293 struct nvif_vmm_page_v0 v0;
294 } *args = argv;
295 const struct nvkm_vmm_page *page;
296 int ret = -ENOSYS;
297 u8 type, index, nr;
298
299 page = uvmm->vmm->func->page;
300 for (nr = 0; page[nr].shift; nr++);
301
302 if (!(nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
303 if ((index = args->v0.index) >= nr)
304 return -EINVAL;
305 type = page[index].type;
306 args->v0.shift = page[index].shift;
307 args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
308 args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
309 args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
310 args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
311 } else
312 return -ENOSYS;
313
314 return 0;
315 }
316
317 static int
nvkm_uvmm_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)318 nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
319 {
320 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
321 switch (mthd) {
322 case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc);
323 case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc);
324 case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc);
325 case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc);
326 case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
327 case NVIF_VMM_V0_PFNMAP: return nvkm_uvmm_mthd_pfnmap(uvmm, argv, argc);
328 case NVIF_VMM_V0_PFNCLR: return nvkm_uvmm_mthd_pfnclr(uvmm, argv, argc);
329 case NVIF_VMM_V0_MTHD(0x00) ... NVIF_VMM_V0_MTHD(0x7f):
330 if (uvmm->vmm->func->mthd) {
331 return uvmm->vmm->func->mthd(uvmm->vmm,
332 uvmm->object.client,
333 mthd, argv, argc);
334 }
335 break;
336 default:
337 break;
338 }
339 return -EINVAL;
340 }
341
342 static void *
nvkm_uvmm_dtor(struct nvkm_object * object)343 nvkm_uvmm_dtor(struct nvkm_object *object)
344 {
345 struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
346 nvkm_vmm_unref(&uvmm->vmm);
347 return uvmm;
348 }
349
350 static const struct nvkm_object_func
351 nvkm_uvmm = {
352 .dtor = nvkm_uvmm_dtor,
353 .mthd = nvkm_uvmm_mthd,
354 };
355
356 int
nvkm_uvmm_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)357 nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
358 struct nvkm_object **pobject)
359 {
360 struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
361 const bool more = oclass->base.maxver >= 0;
362 union {
363 struct nvif_vmm_v0 v0;
364 } *args = argv;
365 const struct nvkm_vmm_page *page;
366 struct nvkm_uvmm *uvmm;
367 int ret = -ENOSYS;
368 u64 addr, size;
369 bool managed;
370
371 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
372 managed = args->v0.managed != 0;
373 addr = args->v0.addr;
374 size = args->v0.size;
375 } else
376 return ret;
377
378 if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
379 return -ENOMEM;
380 nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
381 *pobject = &uvmm->object;
382
383 if (!mmu->vmm) {
384 ret = mmu->func->vmm.ctor(mmu, managed, addr, size, argv, argc,
385 NULL, "user", &uvmm->vmm);
386 if (ret)
387 return ret;
388
389 uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
390 } else {
391 if (size)
392 return -EINVAL;
393
394 uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
395 }
396
397 page = uvmm->vmm->func->page;
398 args->v0.page_nr = 0;
399 while (page && (page++)->shift)
400 args->v0.page_nr++;
401 args->v0.addr = uvmm->vmm->start;
402 args->v0.size = uvmm->vmm->limit;
403 return 0;
404 }
405