drivers/gpu/drm/nouveau/nvkm/core/ioctl.c

   1 /*
   2  * Copyright 2014 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  * Authors: Ben Skeggs <bskeggs@redhat.com>
  23  */
  24 #include <core/ioctl.h>
  25 #include <core/client.h>
  26 #include <core/engine.h>
  27
  28 #include <nvif/unpack.h>
  29 #include <nvif/ioctl.h>
  30
  31 static int
  32 nvkm_ioctl_nop(struct nvkm_client *client,
  33                struct nvkm_object *object, void *data, u32 size)
  34 {
  35         union {
  36                 struct nvif_ioctl_nop_v0 v0;
  37         } *args = data;
  38         int ret = -ENOSYS;
  39
  40         nvif_ioctl(object, "nop size %d\n", size);
  41         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
  42                 nvif_ioctl(object, "nop vers %lld\n", args->v0.version);
  43                 args->v0.version = NVIF_VERSION_LATEST;
  44         }
  45
  46         return ret;
  47 }
  48
  49 static int
  50 nvkm_ioctl_sclass(struct nvkm_client *client,
  51                   struct nvkm_object *object, void *data, u32 size)
  52 {
  53         union {
  54                 struct nvif_ioctl_sclass_v0 v0;
  55         } *args = data;
  56         struct nvkm_oclass oclass;
  57         int ret = -ENOSYS, i = 0;
  58
  59         nvif_ioctl(object, "sclass size %d\n", size);
  60         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
  61                 nvif_ioctl(object, "sclass vers %d count %d\n",
  62                            args->v0.version, args->v0.count);
  63                 if (size != args->v0.count * sizeof(args->v0.oclass[0]))
  64                         return -EINVAL;
  65
  66                 while (object->func->sclass &&
  67                        object->func->sclass(object, i, &oclass) >= 0) {
  68                         if (i < args->v0.count) {
  69                                 args->v0.oclass[i].oclass = oclass.base.oclass;
  70                                 args->v0.oclass[i].minver = oclass.base.minver;
  71                                 args->v0.oclass[i].maxver = oclass.base.maxver;
  72                         }
  73                         i++;
  74                 }
  75
  76                 args->v0.count = i;
  77         }
  78
  79         return ret;
  80 }
  81
  82 static int
  83 nvkm_ioctl_new(struct nvkm_client *client,
  84                struct nvkm_object *parent, void *data, u32 size)
  85 {
  86         union {
  87                 struct nvif_ioctl_new_v0 v0;
  88         } *args = data;
  89         struct nvkm_object *object = NULL;
  90         struct nvkm_oclass oclass;
  91         int ret = -ENOSYS, i = 0;
  92
  93         nvif_ioctl(parent, "new size %d\n", size);
  94         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
  95                 nvif_ioctl(parent, "new vers %d handle %08x class %08x "
  96                                    "route %02x token %llx object %016llx\n",
  97                            args->v0.version, args->v0.handle, args->v0.oclass,
  98                            args->v0.route, args->v0.token, args->v0.object);
  99         } else
 100                 return ret;
 101
 102         if (!parent->func->sclass) {
 103                 nvif_ioctl(parent, "cannot have children\n");
 104                 return -EINVAL;
 105         }
 106
 107         do {
 108                 memset(&oclass, 0x00, sizeof(oclass));
 109                 oclass.handle = args->v0.handle;
 110                 oclass.route  = args->v0.route;
 111                 oclass.token  = args->v0.token;
 112                 oclass.object = args->v0.object;
 113                 oclass.client = client;
 114                 oclass.parent = parent;
 115                 ret = parent->func->sclass(parent, i++, &oclass);
 116                 if (ret)
 117                         return ret;
 118         } while (oclass.base.oclass != args->v0.oclass);
 119
 120         if (oclass.engine) {
 121                 oclass.engine = nvkm_engine_ref(oclass.engine);
 122                 if (IS_ERR(oclass.engine))
 123                         return PTR_ERR(oclass.engine);
 124         }
 125
 126         ret = oclass.ctor(&oclass, data, size, &object);
 127         nvkm_engine_unref(&oclass.engine);
 128         if (ret == 0) {
 129                 ret = nvkm_object_init(object);
 130                 if (ret == 0) {
 131                         list_add(&object->head, &parent->tree);
 132                         if (nvkm_object_insert(object)) {
 133                                 client->data = object;
 134                                 return 0;
 135                         }
 136                         ret = -EEXIST;
 137                 }
 138                 nvkm_object_fini(object, false);
 139         }
 140
 141         nvkm_object_del(&object);
 142         return ret;
 143 }
 144
 145 static int
 146 nvkm_ioctl_del(struct nvkm_client *client,
 147                struct nvkm_object *object, void *data, u32 size)
 148 {
 149         union {
 150                 struct nvif_ioctl_del none;
 151         } *args = data;
 152         int ret = -ENOSYS;
 153
 154         nvif_ioctl(object, "delete size %d\n", size);
 155         if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
 156                 nvif_ioctl(object, "delete\n");
 157                 nvkm_object_fini(object, false);
 158                 nvkm_object_del(&object);
 159         }
 160
 161         return ret ? ret : 1;
 162 }
 163
 164 static int
 165 nvkm_ioctl_mthd(struct nvkm_client *client,
 166                 struct nvkm_object *object, void *data, u32 size)
 167 {
 168         union {
 169                 struct nvif_ioctl_mthd_v0 v0;
 170         } *args = data;
 171         int ret = -ENOSYS;
 172
 173         nvif_ioctl(object, "mthd size %d\n", size);
 174         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 175                 nvif_ioctl(object, "mthd vers %d mthd %02x\n",
 176                            args->v0.version, args->v0.method);
 177                 ret = nvkm_object_mthd(object, args->v0.method, data, size);
 178         }
 179
 180         return ret;
 181 }
 182
 183
 184 static int
 185 nvkm_ioctl_rd(struct nvkm_client *client,
 186               struct nvkm_object *object, void *data, u32 size)
 187 {
 188         union {
 189                 struct nvif_ioctl_rd_v0 v0;
 190         } *args = data;
 191         union {
 192                 u8  b08;
 193                 u16 b16;
 194                 u32 b32;
 195         } v;
 196         int ret = -ENOSYS;
 197
 198         nvif_ioctl(object, "rd size %d\n", size);
 199         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 200                 nvif_ioctl(object, "rd vers %d size %d addr %016llx\n",
 201                            args->v0.version, args->v0.size, args->v0.addr);
 202                 switch (args->v0.size) {
 203                 case 1:
 204                         ret = nvkm_object_rd08(object, args->v0.addr, &v.b08);
 205                         args->v0.data = v.b08;
 206                         break;
 207                 case 2:
 208                         ret = nvkm_object_rd16(object, args->v0.addr, &v.b16);
 209                         args->v0.data = v.b16;
 210                         break;
 211                 case 4:
 212                         ret = nvkm_object_rd32(object, args->v0.addr, &v.b32);
 213                         args->v0.data = v.b32;
 214                         break;
 215                 default:
 216                         ret = -EINVAL;
 217                         break;
 218                 }
 219         }
 220
 221         return ret;
 222 }
 223
 224 static int
 225 nvkm_ioctl_wr(struct nvkm_client *client,
 226               struct nvkm_object *object, void *data, u32 size)
 227 {
 228         union {
 229                 struct nvif_ioctl_wr_v0 v0;
 230         } *args = data;
 231         int ret = -ENOSYS;
 232
 233         nvif_ioctl(object, "wr size %d\n", size);
 234         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 235                 nvif_ioctl(object,
 236                            "wr vers %d size %d addr %016llx data %08x\n",
 237                            args->v0.version, args->v0.size, args->v0.addr,
 238                            args->v0.data);
 239         } else
 240                 return ret;
 241
 242         switch (args->v0.size) {
 243         case 1: return nvkm_object_wr08(object, args->v0.addr, args->v0.data);
 244         case 2: return nvkm_object_wr16(object, args->v0.addr, args->v0.data);
 245         case 4: return nvkm_object_wr32(object, args->v0.addr, args->v0.data);
 246         default:
 247                 break;
 248         }
 249
 250         return -EINVAL;
 251 }
 252
 253 static int
 254 nvkm_ioctl_map(struct nvkm_client *client,
 255                struct nvkm_object *object, void *data, u32 size)
 256 {
 257         union {
 258                 struct nvif_ioctl_map_v0 v0;
 259         } *args = data;
 260         int ret = -ENOSYS;
 261
 262         nvif_ioctl(object, "map size %d\n", size);
 263         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 264                 nvif_ioctl(object, "map vers %d\n", args->v0.version);
 265                 ret = nvkm_object_map(object, &args->v0.handle,
 266                                               &args->v0.length);
 267         }
 268
 269         return ret;
 270 }
 271
 272 static int
 273 nvkm_ioctl_unmap(struct nvkm_client *client,
 274                  struct nvkm_object *object, void *data, u32 size)
 275 {
 276         union {
 277                 struct nvif_ioctl_unmap none;
 278         } *args = data;
 279         int ret = -ENOSYS;
 280
 281         nvif_ioctl(object, "unmap size %d\n", size);
 282         if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
 283                 nvif_ioctl(object, "unmap\n");
 284         }
 285
 286         return ret;
 287 }
 288
 289 static int
 290 nvkm_ioctl_ntfy_new(struct nvkm_client *client,
 291                     struct nvkm_object *object, void *data, u32 size)
 292 {
 293         union {
 294                 struct nvif_ioctl_ntfy_new_v0 v0;
 295         } *args = data;
 296         struct nvkm_event *event;
 297         int ret = -ENOSYS;
 298
 299         nvif_ioctl(object, "ntfy new size %d\n", size);
 300         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 301                 nvif_ioctl(object, "ntfy new vers %d event %02x\n",
 302                            args->v0.version, args->v0.event);
 303                 ret = nvkm_object_ntfy(object, args->v0.event, &event);
 304                 if (ret == 0) {
 305                         ret = nvkm_client_notify_new(object, event, data, size);
 306                         if (ret >= 0) {
 307                                 args->v0.index = ret;
 308                                 ret = 0;
 309                         }
 310                 }
 311         }
 312
 313         return ret;
 314 }
 315
 316 static int
 317 nvkm_ioctl_ntfy_del(struct nvkm_client *client,
 318                     struct nvkm_object *object, void *data, u32 size)
 319 {
 320         union {
 321                 struct nvif_ioctl_ntfy_del_v0 v0;
 322         } *args = data;
 323         int ret = -ENOSYS;
 324
 325         nvif_ioctl(object, "ntfy del size %d\n", size);
 326         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 327                 nvif_ioctl(object, "ntfy del vers %d index %d\n",
 328                            args->v0.version, args->v0.index);
 329                 ret = nvkm_client_notify_del(client, args->v0.index);
 330         }
 331
 332         return ret;
 333 }
 334
 335 static int
 336 nvkm_ioctl_ntfy_get(struct nvkm_client *client,
 337                     struct nvkm_object *object, void *data, u32 size)
 338 {
 339         union {
 340                 struct nvif_ioctl_ntfy_get_v0 v0;
 341         } *args = data;
 342         int ret = -ENOSYS;
 343
 344         nvif_ioctl(object, "ntfy get size %d\n", size);
 345         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 346                 nvif_ioctl(object, "ntfy get vers %d index %d\n",
 347                            args->v0.version, args->v0.index);
 348                 ret = nvkm_client_notify_get(client, args->v0.index);
 349         }
 350
 351         return ret;
 352 }
 353
 354 static int
 355 nvkm_ioctl_ntfy_put(struct nvkm_client *client,
 356                     struct nvkm_object *object, void *data, u32 size)
 357 {
 358         union {
 359                 struct nvif_ioctl_ntfy_put_v0 v0;
 360         } *args = data;
 361         int ret = -ENOSYS;
 362
 363         nvif_ioctl(object, "ntfy put size %d\n", size);
 364         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 365                 nvif_ioctl(object, "ntfy put vers %d index %d\n",
 366                            args->v0.version, args->v0.index);
 367                 ret = nvkm_client_notify_put(client, args->v0.index);
 368         }
 369
 370         return ret;
 371 }
 372
 373 static struct {
 374         int version;
 375         int (*func)(struct nvkm_client *, struct nvkm_object *, void *, u32);
 376 }
 377 nvkm_ioctl_v0[] = {
 378         { 0x00, nvkm_ioctl_nop },
 379         { 0x00, nvkm_ioctl_sclass },
 380         { 0x00, nvkm_ioctl_new },
 381         { 0x00, nvkm_ioctl_del },
 382         { 0x00, nvkm_ioctl_mthd },
 383         { 0x00, nvkm_ioctl_rd },
 384         { 0x00, nvkm_ioctl_wr },
 385         { 0x00, nvkm_ioctl_map },
 386         { 0x00, nvkm_ioctl_unmap },
 387         { 0x00, nvkm_ioctl_ntfy_new },
 388         { 0x00, nvkm_ioctl_ntfy_del },
 389         { 0x00, nvkm_ioctl_ntfy_get },
 390         { 0x00, nvkm_ioctl_ntfy_put },
 391 };
 392
 393 static int
 394 nvkm_ioctl_path(struct nvkm_client *client, u64 handle, u32 type,
 395                 void *data, u32 size, u8 owner, u8 *route, u64 *token)
 396 {
 397         struct nvkm_object *object;
 398         int ret;
 399
 400         object = nvkm_object_search(client, handle, NULL);
 401         if (IS_ERR(object)) {
 402                 nvif_ioctl(&client->object, "object not found\n");
 403                 return PTR_ERR(object);
 404         }
 405
 406         if (owner != NVIF_IOCTL_V0_OWNER_ANY && owner != object->route) {
 407                 nvif_ioctl(&client->object, "route != owner\n");
 408                 return -EACCES;
 409         }
 410         *route = object->route;
 411         *token = object->token;
 412
 413         if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
 414                 if (nvkm_ioctl_v0[type].version == 0)
 415                         ret = nvkm_ioctl_v0[type].func(client, object, data, size);
 416         }
 417
 418         return ret;
 419 }
 420
 421 int
 422 nvkm_ioctl(struct nvkm_client *client, bool supervisor,
 423            void *data, u32 size, void **hack)
 424 {
 425         struct nvkm_object *object = &client->object;
 426         union {
 427                 struct nvif_ioctl_v0 v0;
 428         } *args = data;
 429         int ret = -ENOSYS;
 430
 431         client->super = supervisor;
 432         nvif_ioctl(object, "size %d\n", size);
 433
 434         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 435                 nvif_ioctl(object,
 436                            "vers %d type %02x object %016llx owner %02x\n",
 437                            args->v0.version, args->v0.type, args->v0.object,
 438                            args->v0.owner);
 439                 ret = nvkm_ioctl_path(client, args->v0.object, args->v0.type,
 440                                       data, size, args->v0.owner,
 441                                       &args->v0.route, &args->v0.token);
 442         }
 443
 444         if (ret != 1) {
 445                 nvif_ioctl(object, "return %d\n", ret);
 446                 if (hack) {
 447                         *hack = client->data;
 448                         client->data = NULL;
 449                 }
 450         }
 451
 452         return ret;
 453 }