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 #include <core/handle.h>
  28
  29 #include <nvif/unpack.h>
  30 #include <nvif/ioctl.h>
  31
  32 static int
  33 nvkm_ioctl_nop(struct nvkm_handle *handle, void *data, u32 size)
  34 {
  35         struct nvkm_object *object = handle->object;
  36         union {
  37                 struct nvif_ioctl_nop_v0 v0;
  38         } *args = data;
  39         int ret;
  40
  41         nvif_ioctl(object, "nop size %d\n", size);
  42         if (nvif_unpack(args->v0, 0, 0, false)) {
  43                 nvif_ioctl(object, "nop vers %lld\n", args->v0.version);
  44                 args->v0.version = NVIF_VERSION_LATEST;
  45         }
  46
  47         return ret;
  48 }
  49
  50 static int
  51 nvkm_ioctl_sclass(struct nvkm_handle *handle, void *data, u32 size)
  52 {
  53         struct nvkm_object *object = handle->object;
  54         union {
  55                 struct nvif_ioctl_sclass_v0 v0;
  56         } *args = data;
  57         struct nvkm_oclass oclass;
  58         int ret, i = 0;
  59
  60         nvif_ioctl(object, "sclass size %d\n", size);
  61         if (nvif_unpack(args->v0, 0, 0, true)) {
  62                 nvif_ioctl(object, "sclass vers %d count %d\n",
  63                            args->v0.version, args->v0.count);
  64                 if (size != args->v0.count * sizeof(args->v0.oclass[0]))
  65                         return -EINVAL;
  66
  67                 while (object->func->sclass &&
  68                        object->func->sclass(object, i, &oclass) >= 0) {
  69                         if (i < args->v0.count) {
  70                                 args->v0.oclass[i].oclass = oclass.base.oclass;
  71                                 args->v0.oclass[i].minver = oclass.base.minver;
  72                                 args->v0.oclass[i].maxver = oclass.base.maxver;
  73                         }
  74                         i++;
  75                 }
  76
  77                 args->v0.count = i;
  78         }
  79
  80         return ret;
  81 }
  82
  83 static int
  84 nvkm_ioctl_new(struct nvkm_handle *handle, void *data, u32 size)
  85 {
  86         union {
  87                 struct nvif_ioctl_new_v0 v0;
  88         } *args = data;
  89         struct nvkm_client *client = handle->object->client;
  90         struct nvkm_object *parent = handle->object;
  91         struct nvkm_object *object = NULL;
  92         struct nvkm_oclass oclass;
  93         int ret, i = 0;
  94
  95         nvif_ioctl(parent, "new size %d\n", size);
  96         if (nvif_unpack(args->v0, 0, 0, true)) {
  97                 nvif_ioctl(parent, "new vers %d handle %08x class %08x "
  98                                    "route %02x token %llx object %016llx\n",
  99                            args->v0.version, args->v0.handle, args->v0.oclass,
 100                            args->v0.route, args->v0.token, args->v0.object);
 101         } else
 102                 return ret;
 103
 104         if (!parent->func->sclass) {
 105                 nvif_ioctl(parent, "cannot have children\n");
 106                 return -EINVAL;
 107         }
 108
 109         do {
 110                 memset(&oclass, 0x00, sizeof(oclass));
 111                 oclass.client = client;
 112                 oclass.handle = args->v0.handle;
 113                 oclass.object = args->v0.object;
 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         if (ret)
 128                 goto fail_object;
 129
 130         ret = nvkm_object_inc(object);
 131         if (ret)
 132                 goto fail_object;
 133
 134         ret = nvkm_handle_create(handle, args->v0.handle, object, &handle);
 135         if (ret)
 136                 goto fail_handle;
 137
 138         ret = nvkm_handle_init(handle);
 139         handle->route = args->v0.route;
 140         handle->token = args->v0.token;
 141         if (ret)
 142                 nvkm_handle_destroy(handle);
 143
 144         handle->handle = args->v0.object;
 145         nvkm_client_insert(client, handle);
 146         client->data = object;
 147 fail_handle:
 148         nvkm_object_dec(object, false);
 149 fail_object:
 150         nvkm_object_ref(NULL, &object);
 151         nvkm_engine_unref(&oclass.engine);
 152         return ret;
 153 }
 154
 155 static int
 156 nvkm_ioctl_del(struct nvkm_handle *handle, void *data, u32 size)
 157 {
 158         struct nvkm_object *object = handle->object;
 159         union {
 160                 struct nvif_ioctl_del none;
 161         } *args = data;
 162         int ret;
 163
 164         nvif_ioctl(object, "delete size %d\n", size);
 165         if (nvif_unvers(args->none)) {
 166                 nvif_ioctl(object, "delete\n");
 167                 nvkm_handle_fini(handle, false);
 168                 nvkm_handle_destroy(handle);
 169         }
 170
 171         return ret;
 172 }
 173
 174 static int
 175 nvkm_ioctl_mthd(struct nvkm_handle *handle, void *data, u32 size)
 176 {
 177         struct nvkm_object *object = handle->object;
 178         union {
 179                 struct nvif_ioctl_mthd_v0 v0;
 180         } *args = data;
 181         int ret;
 182
 183         nvif_ioctl(object, "mthd size %d\n", size);
 184         if (nvif_unpack(args->v0, 0, 0, true)) {
 185                 nvif_ioctl(object, "mthd vers %d mthd %02x\n",
 186                            args->v0.version, args->v0.method);
 187                 ret = nvkm_object_mthd(object, args->v0.method, data, size);
 188         }
 189
 190         return ret;
 191 }
 192
 193
 194 static int
 195 nvkm_ioctl_rd(struct nvkm_handle *handle, void *data, u32 size)
 196 {
 197         struct nvkm_object *object = handle->object;
 198         union {
 199                 struct nvif_ioctl_rd_v0 v0;
 200         } *args = data;
 201         union {
 202                 u8  b08;
 203                 u16 b16;
 204                 u32 b32;
 205         } v;
 206         int ret;
 207
 208         nvif_ioctl(object, "rd size %d\n", size);
 209         if (nvif_unpack(args->v0, 0, 0, false)) {
 210                 nvif_ioctl(object, "rd vers %d size %d addr %016llx\n",
 211                            args->v0.version, args->v0.size, args->v0.addr);
 212                 switch (args->v0.size) {
 213                 case 1:
 214                         ret = nvkm_object_rd08(object, args->v0.addr, &v.b08);
 215                         args->v0.data = v.b08;
 216                         break;
 217                 case 2:
 218                         ret = nvkm_object_rd16(object, args->v0.addr, &v.b16);
 219                         args->v0.data = v.b16;
 220                         break;
 221                 case 4:
 222                         ret = nvkm_object_rd32(object, args->v0.addr, &v.b32);
 223                         args->v0.data = v.b32;
 224                         break;
 225                 default:
 226                         ret = -EINVAL;
 227                         break;
 228                 }
 229         }
 230
 231         return ret;
 232 }
 233
 234 static int
 235 nvkm_ioctl_wr(struct nvkm_handle *handle, void *data, u32 size)
 236 {
 237         struct nvkm_object *object = handle->object;
 238         union {
 239                 struct nvif_ioctl_wr_v0 v0;
 240         } *args = data;
 241         int ret;
 242
 243         nvif_ioctl(object, "wr size %d\n", size);
 244         if (nvif_unpack(args->v0, 0, 0, false)) {
 245                 nvif_ioctl(object,
 246                            "wr vers %d size %d addr %016llx data %08x\n",
 247                            args->v0.version, args->v0.size, args->v0.addr,
 248                            args->v0.data);
 249         } else
 250                 return ret;
 251
 252         switch (args->v0.size) {
 253         case 1: return nvkm_object_wr08(object, args->v0.addr, args->v0.data);
 254         case 2: return nvkm_object_wr16(object, args->v0.addr, args->v0.data);
 255         case 4: return nvkm_object_wr32(object, args->v0.addr, args->v0.data);
 256         default:
 257                 break;
 258         }
 259
 260         return -EINVAL;
 261 }
 262
 263 static int
 264 nvkm_ioctl_map(struct nvkm_handle *handle, void *data, u32 size)
 265 {
 266         struct nvkm_object *object = handle->object;
 267         union {
 268                 struct nvif_ioctl_map_v0 v0;
 269         } *args = data;
 270         int ret;
 271
 272         nvif_ioctl(object, "map size %d\n", size);
 273         if (nvif_unpack(args->v0, 0, 0, false)) {
 274                 nvif_ioctl(object, "map vers %d\n", args->v0.version);
 275                 ret = nvkm_object_map(object, &args->v0.handle,
 276                                               &args->v0.length);
 277         }
 278
 279         return ret;
 280 }
 281
 282 static int
 283 nvkm_ioctl_unmap(struct nvkm_handle *handle, void *data, u32 size)
 284 {
 285         struct nvkm_object *object = handle->object;
 286         union {
 287                 struct nvif_ioctl_unmap none;
 288         } *args = data;
 289         int ret;
 290
 291         nvif_ioctl(object, "unmap size %d\n", size);
 292         if (nvif_unvers(args->none)) {
 293                 nvif_ioctl(object, "unmap\n");
 294         }
 295
 296         return ret;
 297 }
 298
 299 static int
 300 nvkm_ioctl_ntfy_new(struct nvkm_handle *handle, void *data, u32 size)
 301 {
 302         struct nvkm_object *object = handle->object;
 303         union {
 304                 struct nvif_ioctl_ntfy_new_v0 v0;
 305         } *args = data;
 306         struct nvkm_event *event;
 307         int ret;
 308
 309         nvif_ioctl(object, "ntfy new size %d\n", size);
 310         if (nvif_unpack(args->v0, 0, 0, true)) {
 311                 nvif_ioctl(object, "ntfy new vers %d event %02x\n",
 312                            args->v0.version, args->v0.event);
 313                 ret = nvkm_object_ntfy(object, args->v0.event, &event);
 314                 if (ret == 0) {
 315                         ret = nvkm_client_notify_new(object, event, data, size);
 316                         if (ret >= 0) {
 317                                 args->v0.index = ret;
 318                                 ret = 0;
 319                         }
 320                 }
 321         }
 322
 323         return ret;
 324 }
 325
 326 static int
 327 nvkm_ioctl_ntfy_del(struct nvkm_handle *handle, void *data, u32 size)
 328 {
 329         struct nvkm_client *client = nvkm_client(handle->object);
 330         struct nvkm_object *object = handle->object;
 331         union {
 332                 struct nvif_ioctl_ntfy_del_v0 v0;
 333         } *args = data;
 334         int ret;
 335
 336         nvif_ioctl(object, "ntfy del size %d\n", size);
 337         if (nvif_unpack(args->v0, 0, 0, false)) {
 338                 nvif_ioctl(object, "ntfy del vers %d index %d\n",
 339                            args->v0.version, args->v0.index);
 340                 ret = nvkm_client_notify_del(client, args->v0.index);
 341         }
 342
 343         return ret;
 344 }
 345
 346 static int
 347 nvkm_ioctl_ntfy_get(struct nvkm_handle *handle, void *data, u32 size)
 348 {
 349         struct nvkm_client *client = nvkm_client(handle->object);
 350         struct nvkm_object *object = handle->object;
 351         union {
 352                 struct nvif_ioctl_ntfy_get_v0 v0;
 353         } *args = data;
 354         int ret;
 355
 356         nvif_ioctl(object, "ntfy get size %d\n", size);
 357         if (nvif_unpack(args->v0, 0, 0, false)) {
 358                 nvif_ioctl(object, "ntfy get vers %d index %d\n",
 359                            args->v0.version, args->v0.index);
 360                 ret = nvkm_client_notify_get(client, args->v0.index);
 361         }
 362
 363         return ret;
 364 }
 365
 366 static int
 367 nvkm_ioctl_ntfy_put(struct nvkm_handle *handle, void *data, u32 size)
 368 {
 369         struct nvkm_client *client = nvkm_client(handle->object);
 370         struct nvkm_object *object = handle->object;
 371         union {
 372                 struct nvif_ioctl_ntfy_put_v0 v0;
 373         } *args = data;
 374         int ret;
 375
 376         nvif_ioctl(object, "ntfy put size %d\n", size);
 377         if (nvif_unpack(args->v0, 0, 0, false)) {
 378                 nvif_ioctl(object, "ntfy put vers %d index %d\n",
 379                            args->v0.version, args->v0.index);
 380                 ret = nvkm_client_notify_put(client, args->v0.index);
 381         }
 382
 383         return ret;
 384 }
 385
 386 static struct {
 387         int version;
 388         int (*func)(struct nvkm_handle *, void *, u32);
 389 }
 390 nvkm_ioctl_v0[] = {
 391         { 0x00, nvkm_ioctl_nop },
 392         { 0x00, nvkm_ioctl_sclass },
 393         { 0x00, nvkm_ioctl_new },
 394         { 0x00, nvkm_ioctl_del },
 395         { 0x00, nvkm_ioctl_mthd },
 396         { 0x00, nvkm_ioctl_rd },
 397         { 0x00, nvkm_ioctl_wr },
 398         { 0x00, nvkm_ioctl_map },
 399         { 0x00, nvkm_ioctl_unmap },
 400         { 0x00, nvkm_ioctl_ntfy_new },
 401         { 0x00, nvkm_ioctl_ntfy_del },
 402         { 0x00, nvkm_ioctl_ntfy_get },
 403         { 0x00, nvkm_ioctl_ntfy_put },
 404 };
 405
 406 static int
 407 nvkm_ioctl_path(struct nvkm_client *client, u64 handle, u32 type,
 408                 void *data, u32 size, u8 owner, u8 *route, u64 *token)
 409 {
 410         struct nvkm_handle *object;
 411         int ret;
 412
 413         if (handle)
 414                 object = nvkm_client_search(client, handle);
 415         else
 416                 object = client->root;
 417         if (unlikely(!object)) {
 418                 nvif_ioctl(&client->object, "object not found\n");
 419                 return -ENOENT;
 420         }
 421
 422         if (owner != NVIF_IOCTL_V0_OWNER_ANY && owner != object->route) {
 423                 nvif_ioctl(&client->object, "route != owner\n");
 424                 return -EACCES;
 425         }
 426         *route = object->route;
 427         *token = object->token;
 428
 429         if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
 430                 if (nvkm_ioctl_v0[type].version == 0)
 431                         ret = nvkm_ioctl_v0[type].func(object, data, size);
 432         }
 433
 434         return ret;
 435 }
 436
 437 int
 438 nvkm_ioctl(struct nvkm_client *client, bool supervisor,
 439            void *data, u32 size, void **hack)
 440 {
 441         struct nvkm_object *object = &client->object;
 442         union {
 443                 struct nvif_ioctl_v0 v0;
 444         } *args = data;
 445         int ret;
 446
 447         client->super = supervisor;
 448         nvif_ioctl(object, "size %d\n", size);
 449
 450         if (nvif_unpack(args->v0, 0, 0, true)) {
 451                 nvif_ioctl(object,
 452                            "vers %d type %02x object %016llx owner %02x\n",
 453                            args->v0.version, args->v0.type, args->v0.object,
 454                            args->v0.owner);
 455                 ret = nvkm_ioctl_path(client, args->v0.object, args->v0.type,
 456                                       data, size, args->v0.owner,
 457                                       &args->v0.route, &args->v0.token);
 458         }
 459
 460         nvif_ioctl(object, "return %d\n", ret);
 461         if (hack) {
 462                 *hack = client->data;
 463                 client->data = NULL;
 464         }
 465
 466         client->super = false;
 467         return ret;
 468 }