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 * 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 46 nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc) 47 { 48 struct nvkm_client *client = uvmm->object.client; 49 union { 50 struct nvif_vmm_unmap_v0 v0; 51 } *args = argv; 52 struct nvkm_vmm *vmm = uvmm->vmm; 53 struct nvkm_vma *vma; 54 int ret = -ENOSYS; 55 u64 addr; 56 57 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) { 58 addr = args->v0.addr; 59 } else 60 return ret; 61 62 mutex_lock(&vmm->mutex); 63 vma = nvkm_vmm_node_search(vmm, addr); 64 if (ret = -ENOENT, !vma || vma->addr != addr) { 65 VMM_DEBUG(vmm, "lookup %016llx: %016llx", 66 addr, vma ? vma->addr : ~0ULL); 67 goto done; 68 } 69 70 if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) { 71 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr, 72 vma->user, !client->super, vma->busy); 73 goto done; 74 } 75 76 if (ret = -EINVAL, !vma->memory) { 77 VMM_DEBUG(vmm, "unmapped"); 78 goto done; 79 } 80 81 nvkm_vmm_unmap_locked(vmm, vma); 82 ret = 0; 83 done: 84 mutex_unlock(&vmm->mutex); 85 return ret; 86 } 87 88 static int 89 nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc) 90 { 91 struct nvkm_client *client = uvmm->object.client; 92 union { 93 struct nvif_vmm_map_v0 v0; 94 } *args = argv; 95 u64 addr, size, handle, offset; 96 struct nvkm_vmm *vmm = uvmm->vmm; 97 struct nvkm_vma *vma; 98 struct nvkm_memory *memory; 99 int ret = -ENOSYS; 100 101 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) { 102 addr = args->v0.addr; 103 size = args->v0.size; 104 handle = args->v0.memory; 105 offset = args->v0.offset; 106 } else 107 return ret; 108 109 if (IS_ERR((memory = nvkm_umem_search(client, handle)))) { 110 VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory)); 111 return PTR_ERR(memory); 112 } 113 114 mutex_lock(&vmm->mutex); 115 if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) { 116 VMM_DEBUG(vmm, "lookup %016llx", addr); 117 goto fail; 118 } 119 120 if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) { 121 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr, 122 vma->user, !client->super, vma->busy); 123 goto fail; 124 } 125 126 if (ret = -EINVAL, vma->addr != addr || vma->size != size) { 127 if (addr + size > vma->addr + vma->size || vma->memory || 128 (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) { 129 VMM_DEBUG(vmm, "split %d %d %d " 130 "%016llx %016llx %016llx %016llx", 131 !!vma->memory, vma->refd, vma->mapref, 132 addr, size, vma->addr, (u64)vma->size); 133 goto fail; 134 } 135 136 if (vma->addr != addr) { 137 const u64 tail = vma->size + vma->addr - addr; 138 if (ret = -ENOMEM, !(vma = nvkm_vma_tail(vma, tail))) 139 goto fail; 140 vma->part = true; 141 nvkm_vmm_node_insert(vmm, vma); 142 } 143 144 if (vma->size != size) { 145 const u64 tail = vma->size - size; 146 struct nvkm_vma *tmp; 147 if (ret = -ENOMEM, !(tmp = nvkm_vma_tail(vma, tail))) { 148 nvkm_vmm_unmap_region(vmm, vma); 149 goto fail; 150 } 151 tmp->part = true; 152 nvkm_vmm_node_insert(vmm, tmp); 153 } 154 } 155 vma->busy = true; 156 mutex_unlock(&vmm->mutex); 157 158 ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc); 159 if (ret == 0) { 160 /* Successful map will clear vma->busy. */ 161 nvkm_memory_unref(&memory); 162 return 0; 163 } 164 165 mutex_lock(&vmm->mutex); 166 vma->busy = false; 167 nvkm_vmm_unmap_region(vmm, vma); 168 fail: 169 mutex_unlock(&vmm->mutex); 170 nvkm_memory_unref(&memory); 171 return ret; 172 } 173 174 static int 175 nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc) 176 { 177 struct nvkm_client *client = uvmm->object.client; 178 union { 179 struct nvif_vmm_put_v0 v0; 180 } *args = argv; 181 struct nvkm_vmm *vmm = uvmm->vmm; 182 struct nvkm_vma *vma; 183 int ret = -ENOSYS; 184 u64 addr; 185 186 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) { 187 addr = args->v0.addr; 188 } else 189 return ret; 190 191 mutex_lock(&vmm->mutex); 192 vma = nvkm_vmm_node_search(vmm, args->v0.addr); 193 if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) { 194 VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr, 195 vma ? vma->addr : ~0ULL, vma ? vma->part : 0); 196 goto done; 197 } 198 199 if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) { 200 VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr, 201 vma->user, !client->super, vma->busy); 202 goto done; 203 } 204 205 nvkm_vmm_put_locked(vmm, vma); 206 ret = 0; 207 done: 208 mutex_unlock(&vmm->mutex); 209 return ret; 210 } 211 212 static int 213 nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc) 214 { 215 struct nvkm_client *client = uvmm->object.client; 216 union { 217 struct nvif_vmm_get_v0 v0; 218 } *args = argv; 219 struct nvkm_vmm *vmm = uvmm->vmm; 220 struct nvkm_vma *vma; 221 int ret = -ENOSYS; 222 bool getref, mapref, sparse; 223 u8 page, align; 224 u64 size; 225 226 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) { 227 getref = args->v0.type == NVIF_VMM_GET_V0_PTES; 228 mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR; 229 sparse = args->v0.sparse; 230 page = args->v0.page; 231 align = args->v0.align; 232 size = args->v0.size; 233 } else 234 return ret; 235 236 mutex_lock(&vmm->mutex); 237 ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse, 238 page, align, size, &vma); 239 mutex_unlock(&vmm->mutex); 240 if (ret) 241 return ret; 242 243 args->v0.addr = vma->addr; 244 vma->user = !client->super; 245 return ret; 246 } 247 248 static int 249 nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc) 250 { 251 union { 252 struct nvif_vmm_page_v0 v0; 253 } *args = argv; 254 const struct nvkm_vmm_page *page; 255 int ret = -ENOSYS; 256 u8 type, index, nr; 257 258 page = uvmm->vmm->func->page; 259 for (nr = 0; page[nr].shift; nr++); 260 261 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) { 262 if ((index = args->v0.index) >= nr) 263 return -EINVAL; 264 type = page[index].type; 265 args->v0.shift = page[index].shift; 266 args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE); 267 args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM); 268 args->v0.host = !!(type & NVKM_VMM_PAGE_HOST); 269 args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP); 270 } else 271 return -ENOSYS; 272 273 return 0; 274 } 275 276 static int 277 nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc) 278 { 279 struct nvkm_uvmm *uvmm = nvkm_uvmm(object); 280 switch (mthd) { 281 case NVIF_VMM_V0_PAGE : return nvkm_uvmm_mthd_page (uvmm, argv, argc); 282 case NVIF_VMM_V0_GET : return nvkm_uvmm_mthd_get (uvmm, argv, argc); 283 case NVIF_VMM_V0_PUT : return nvkm_uvmm_mthd_put (uvmm, argv, argc); 284 case NVIF_VMM_V0_MAP : return nvkm_uvmm_mthd_map (uvmm, argv, argc); 285 case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc); 286 default: 287 break; 288 } 289 return -EINVAL; 290 } 291 292 static void * 293 nvkm_uvmm_dtor(struct nvkm_object *object) 294 { 295 struct nvkm_uvmm *uvmm = nvkm_uvmm(object); 296 nvkm_vmm_unref(&uvmm->vmm); 297 return uvmm; 298 } 299 300 static const struct nvkm_object_func 301 nvkm_uvmm = { 302 .dtor = nvkm_uvmm_dtor, 303 .mthd = nvkm_uvmm_mthd, 304 }; 305 306 int 307 nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, 308 struct nvkm_object **pobject) 309 { 310 struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu; 311 const bool more = oclass->base.maxver >= 0; 312 union { 313 struct nvif_vmm_v0 v0; 314 } *args = argv; 315 const struct nvkm_vmm_page *page; 316 struct nvkm_uvmm *uvmm; 317 int ret = -ENOSYS; 318 u64 addr, size; 319 320 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) { 321 addr = args->v0.addr; 322 size = args->v0.size; 323 } else 324 return ret; 325 326 if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL))) 327 return -ENOMEM; 328 nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object); 329 *pobject = &uvmm->object; 330 331 if (!mmu->vmm) { 332 ret = mmu->func->vmm.ctor(mmu, addr, size, argv, argc, 333 NULL, "user", &uvmm->vmm); 334 if (ret) 335 return ret; 336 337 uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug); 338 } else { 339 if (size) 340 return -EINVAL; 341 342 uvmm->vmm = nvkm_vmm_ref(mmu->vmm); 343 } 344 345 page = uvmm->vmm->func->page; 346 args->v0.page_nr = 0; 347 while (page && (page++)->shift) 348 args->v0.page_nr++; 349 args->v0.addr = uvmm->vmm->start; 350 args->v0.size = uvmm->vmm->limit; 351 return 0; 352 } 353