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