kernel/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 #include <core/namedb.h>
  29
  30 #include <nvif/unpack.h>
  31 #include <nvif/ioctl.h>
  32
  33 static int
  34 nvkm_ioctl_nop(struct nvkm_handle *handle, void *data, u32 size)
  35 {
  36         struct nvkm_object *object = handle->object;
  37         union {
  38                 struct nvif_ioctl_nop none;
  39         } *args = data;
  40         int ret;
  41
  42         nv_ioctl(object, "nop size %d\n", size);
  43         if (nvif_unvers(args->none)) {
  44                 nv_ioctl(object, "nop\n");
  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         int ret;
  58
  59         if (!nv_iclass(object, NV_PARENT_CLASS)) {
  60                 nv_debug(object, "cannot have children (sclass)\n");
  61                 return -ENODEV;
  62         }
  63
  64         nv_ioctl(object, "sclass size %d\n", size);
  65         if (nvif_unpack(args->v0, 0, 0, true)) {
  66                 nv_ioctl(object, "sclass vers %d count %d\n",
  67                          args->v0.version, args->v0.count);
  68                 if (size == args->v0.count * sizeof(args->v0.oclass[0])) {
  69                         ret = nvkm_parent_lclass(object, args->v0.oclass,
  70                                                          args->v0.count);
  71                         if (ret >= 0) {
  72                                 args->v0.count = ret;
  73                                 ret = 0;
  74                         }
  75                 } else {
  76                         ret = -EINVAL;
  77                 }
  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 = nvkm_client(handle->object);
  90         struct nvkm_object *engctx = NULL;
  91         struct nvkm_object *object = NULL;
  92         struct nvkm_parent *parent;
  93         struct nvkm_object *engine;
  94         struct nvkm_oclass *oclass;
  95         u32 _handle, _oclass;
  96         int ret;
  97
  98         nv_ioctl(client, "new size %d\n", size);
  99         if (nvif_unpack(args->v0, 0, 0, true)) {
 100                 _handle = args->v0.handle;
 101                 _oclass = args->v0.oclass;
 102         } else
 103                 return ret;
 104
 105         nv_ioctl(client, "new vers %d handle %08x class %08x "
 106                          "route %02x token %llx\n",
 107                  args->v0.version, _handle, _oclass,
 108                  args->v0.route, args->v0.token);
 109
 110         if (!nv_iclass(handle->object, NV_PARENT_CLASS)) {
 111                 nv_debug(handle->object, "cannot have children (ctor)\n");
 112                 ret = -ENODEV;
 113                 goto fail_class;
 114         }
 115
 116         parent = nv_parent(handle->object);
 117
 118         /* check that parent supports the requested subclass */
 119         ret = nvkm_parent_sclass(&parent->object, _oclass, &engine, &oclass);
 120         if (ret) {
 121                 nv_debug(parent, "illegal class 0x%04x\n", _oclass);
 122                 goto fail_class;
 123         }
 124
 125         /* make sure engine init has been completed *before* any objects
 126          * it controls are created - the constructors may depend on
 127          * state calculated at init (ie. default context construction)
 128          */
 129         if (engine) {
 130                 ret = nvkm_object_inc(engine);
 131                 if (ret)
 132                         goto fail_class;
 133         }
 134
 135         /* if engine requires it, create a context object to insert
 136          * between the parent and its children (eg. PGRAPH context)
 137          */
 138         if (engine && nv_engine(engine)->cclass) {
 139                 ret = nvkm_object_ctor(&parent->object, engine,
 140                                        nv_engine(engine)->cclass,
 141                                        data, size, &engctx);
 142                 if (ret)
 143                         goto fail_engctx;
 144         } else {
 145                 nvkm_object_ref(&parent->object, &engctx);
 146         }
 147
 148         /* finally, create new object and bind it to its handle */
 149         ret = nvkm_object_ctor(engctx, engine, oclass, data, size, &object);
 150         client->data = object;
 151         if (ret)
 152                 goto fail_ctor;
 153
 154         ret = nvkm_object_inc(object);
 155         if (ret)
 156                 goto fail_init;
 157
 158         ret = nvkm_handle_create(&parent->object, handle->name,
 159                                  _handle, object, &handle);
 160         if (ret)
 161                 goto fail_handle;
 162
 163         ret = nvkm_handle_init(handle);
 164         handle->route = args->v0.route;
 165         handle->token = args->v0.token;
 166         if (ret)
 167                 nvkm_handle_destroy(handle);
 168
 169 fail_handle:
 170         nvkm_object_dec(object, false);
 171 fail_init:
 172         nvkm_object_ref(NULL, &object);
 173 fail_ctor:
 174         nvkm_object_ref(NULL, &engctx);
 175 fail_engctx:
 176         if (engine)
 177                 nvkm_object_dec(engine, false);
 178 fail_class:
 179         return ret;
 180 }
 181
 182 static int
 183 nvkm_ioctl_del(struct nvkm_handle *handle, void *data, u32 size)
 184 {
 185         struct nvkm_object *object = handle->object;
 186         union {
 187                 struct nvif_ioctl_del none;
 188         } *args = data;
 189         int ret;
 190
 191         nv_ioctl(object, "delete size %d\n", size);
 192         if (nvif_unvers(args->none)) {
 193                 nv_ioctl(object, "delete\n");
 194                 nvkm_handle_fini(handle, false);
 195                 nvkm_handle_destroy(handle);
 196         }
 197
 198         return ret;
 199 }
 200
 201 static int
 202 nvkm_ioctl_mthd(struct nvkm_handle *handle, void *data, u32 size)
 203 {
 204         struct nvkm_object *object = handle->object;
 205         struct nvkm_ofuncs *ofuncs = object->oclass->ofuncs;
 206         union {
 207                 struct nvif_ioctl_mthd_v0 v0;
 208         } *args = data;
 209         int ret;
 210
 211         nv_ioctl(object, "mthd size %d\n", size);
 212         if (nvif_unpack(args->v0, 0, 0, true)) {
 213                 nv_ioctl(object, "mthd vers %d mthd %02x\n",
 214                          args->v0.version, args->v0.method);
 215                 if (ret = -ENODEV, ofuncs->mthd)
 216                         ret = ofuncs->mthd(object, args->v0.method, data, size);
 217         }
 218
 219         return ret;
 220 }
 221
 222
 223 static int
 224 nvkm_ioctl_rd(struct nvkm_handle *handle, void *data, u32 size)
 225 {
 226         struct nvkm_object *object = handle->object;
 227         struct nvkm_ofuncs *ofuncs = object->oclass->ofuncs;
 228         union {
 229                 struct nvif_ioctl_rd_v0 v0;
 230         } *args = data;
 231         int ret;
 232
 233         nv_ioctl(object, "rd size %d\n", size);
 234         if (nvif_unpack(args->v0, 0, 0, false)) {
 235                 nv_ioctl(object, "rd vers %d size %d addr %016llx\n",
 236                          args->v0.version, args->v0.size, args->v0.addr);
 237                 switch (args->v0.size) {
 238                 case 1:
 239                         if (ret = -ENODEV, ofuncs->rd08) {
 240                                 args->v0.data = nv_ro08(object, args->v0.addr);
 241                                 ret = 0;
 242                         }
 243                         break;
 244                 case 2:
 245                         if (ret = -ENODEV, ofuncs->rd16) {
 246                                 args->v0.data = nv_ro16(object, args->v0.addr);
 247                                 ret = 0;
 248                         }
 249                         break;
 250                 case 4:
 251                         if (ret = -ENODEV, ofuncs->rd32) {
 252                                 args->v0.data = nv_ro32(object, args->v0.addr);
 253                                 ret = 0;
 254                         }
 255                         break;
 256                 default:
 257                         ret = -EINVAL;
 258                         break;
 259                 }
 260         }
 261
 262         return ret;
 263 }
 264
 265 static int
 266 nvkm_ioctl_wr(struct nvkm_handle *handle, void *data, u32 size)
 267 {
 268         struct nvkm_object *object = handle->object;
 269         struct nvkm_ofuncs *ofuncs = object->oclass->ofuncs;
 270         union {
 271                 struct nvif_ioctl_wr_v0 v0;
 272         } *args = data;
 273         int ret;
 274
 275         nv_ioctl(object, "wr size %d\n", size);
 276         if (nvif_unpack(args->v0, 0, 0, false)) {
 277                 nv_ioctl(object, "wr vers %d size %d addr %016llx data %08x\n",
 278                          args->v0.version, args->v0.size, args->v0.addr,
 279                          args->v0.data);
 280                 switch (args->v0.size) {
 281                 case 1:
 282                         if (ret = -ENODEV, ofuncs->wr08) {
 283                                 nv_wo08(object, args->v0.addr, args->v0.data);
 284                                 ret = 0;
 285                         }
 286                         break;
 287                 case 2:
 288                         if (ret = -ENODEV, ofuncs->wr16) {
 289                                 nv_wo16(object, args->v0.addr, args->v0.data);
 290                                 ret = 0;
 291                         }
 292                         break;
 293                 case 4:
 294                         if (ret = -ENODEV, ofuncs->wr32) {
 295                                 nv_wo32(object, args->v0.addr, args->v0.data);
 296                                 ret = 0;
 297                         }
 298                         break;
 299                 default:
 300                         ret = -EINVAL;
 301                         break;
 302                 }
 303         }
 304
 305         return ret;
 306 }
 307
 308 static int
 309 nvkm_ioctl_map(struct nvkm_handle *handle, void *data, u32 size)
 310 {
 311         struct nvkm_object *object = handle->object;
 312         struct nvkm_ofuncs *ofuncs = object->oclass->ofuncs;
 313         union {
 314                 struct nvif_ioctl_map_v0 v0;
 315         } *args = data;
 316         int ret;
 317
 318         nv_ioctl(object, "map size %d\n", size);
 319         if (nvif_unpack(args->v0, 0, 0, false)) {
 320                 nv_ioctl(object, "map vers %d\n", args->v0.version);
 321                 if (ret = -ENODEV, ofuncs->map) {
 322                         ret = ofuncs->map(object, &args->v0.handle,
 323                                                   &args->v0.length);
 324                 }
 325         }
 326
 327         return ret;
 328 }
 329
 330 static int
 331 nvkm_ioctl_unmap(struct nvkm_handle *handle, void *data, u32 size)
 332 {
 333         struct nvkm_object *object = handle->object;
 334         union {
 335                 struct nvif_ioctl_unmap none;
 336         } *args = data;
 337         int ret;
 338
 339         nv_ioctl(object, "unmap size %d\n", size);
 340         if (nvif_unvers(args->none)) {
 341                 nv_ioctl(object, "unmap\n");
 342         }
 343
 344         return ret;
 345 }
 346
 347 static int
 348 nvkm_ioctl_ntfy_new(struct nvkm_handle *handle, void *data, u32 size)
 349 {
 350         struct nvkm_object *object = handle->object;
 351         struct nvkm_ofuncs *ofuncs = object->oclass->ofuncs;
 352         union {
 353                 struct nvif_ioctl_ntfy_new_v0 v0;
 354         } *args = data;
 355         struct nvkm_event *event;
 356         int ret;
 357
 358         nv_ioctl(object, "ntfy new size %d\n", size);
 359         if (nvif_unpack(args->v0, 0, 0, true)) {
 360                 nv_ioctl(object, "ntfy new vers %d event %02x\n",
 361                          args->v0.version, args->v0.event);
 362                 if (ret = -ENODEV, ofuncs->ntfy)
 363                         ret = ofuncs->ntfy(object, args->v0.event, &event);
 364                 if (ret == 0) {
 365                         ret = nvkm_client_notify_new(object, event, data, size);
 366                         if (ret >= 0) {
 367                                 args->v0.index = ret;
 368                                 ret = 0;
 369                         }
 370                 }
 371         }
 372
 373         return ret;
 374 }
 375
 376 static int
 377 nvkm_ioctl_ntfy_del(struct nvkm_handle *handle, void *data, u32 size)
 378 {
 379         struct nvkm_client *client = nvkm_client(handle->object);
 380         struct nvkm_object *object = handle->object;
 381         union {
 382                 struct nvif_ioctl_ntfy_del_v0 v0;
 383         } *args = data;
 384         int ret;
 385
 386         nv_ioctl(object, "ntfy del size %d\n", size);
 387         if (nvif_unpack(args->v0, 0, 0, false)) {
 388                 nv_ioctl(object, "ntfy del vers %d index %d\n",
 389                          args->v0.version, args->v0.index);
 390                 ret = nvkm_client_notify_del(client, args->v0.index);
 391         }
 392
 393         return ret;
 394 }
 395
 396 static int
 397 nvkm_ioctl_ntfy_get(struct nvkm_handle *handle, void *data, u32 size)
 398 {
 399         struct nvkm_client *client = nvkm_client(handle->object);
 400         struct nvkm_object *object = handle->object;
 401         union {
 402                 struct nvif_ioctl_ntfy_get_v0 v0;
 403         } *args = data;
 404         int ret;
 405
 406         nv_ioctl(object, "ntfy get size %d\n", size);
 407         if (nvif_unpack(args->v0, 0, 0, false)) {
 408                 nv_ioctl(object, "ntfy get vers %d index %d\n",
 409                          args->v0.version, args->v0.index);
 410                 ret = nvkm_client_notify_get(client, args->v0.index);
 411         }
 412
 413         return ret;
 414 }
 415
 416 static int
 417 nvkm_ioctl_ntfy_put(struct nvkm_handle *handle, void *data, u32 size)
 418 {
 419         struct nvkm_client *client = nvkm_client(handle->object);
 420         struct nvkm_object *object = handle->object;
 421         union {
 422                 struct nvif_ioctl_ntfy_put_v0 v0;
 423         } *args = data;
 424         int ret;
 425
 426         nv_ioctl(object, "ntfy put size %d\n", size);
 427         if (nvif_unpack(args->v0, 0, 0, false)) {
 428                 nv_ioctl(object, "ntfy put vers %d index %d\n",
 429                          args->v0.version, args->v0.index);
 430                 ret = nvkm_client_notify_put(client, args->v0.index);
 431         }
 432
 433         return ret;
 434 }
 435
 436 static struct {
 437         int version;
 438         int (*func)(struct nvkm_handle *, void *, u32);
 439 }
 440 nvkm_ioctl_v0[] = {
 441         { 0x00, nvkm_ioctl_nop },
 442         { 0x00, nvkm_ioctl_sclass },
 443         { 0x00, nvkm_ioctl_new },
 444         { 0x00, nvkm_ioctl_del },
 445         { 0x00, nvkm_ioctl_mthd },
 446         { 0x00, nvkm_ioctl_rd },
 447         { 0x00, nvkm_ioctl_wr },
 448         { 0x00, nvkm_ioctl_map },
 449         { 0x00, nvkm_ioctl_unmap },
 450         { 0x00, nvkm_ioctl_ntfy_new },
 451         { 0x00, nvkm_ioctl_ntfy_del },
 452         { 0x00, nvkm_ioctl_ntfy_get },
 453         { 0x00, nvkm_ioctl_ntfy_put },
 454 };
 455
 456 static int
 457 nvkm_ioctl_path(struct nvkm_handle *parent, u32 type, u32 nr, u32 *path,
 458                 void *data, u32 size, u8 owner, u8 *route, u64 *token)
 459 {
 460         struct nvkm_handle *handle = parent;
 461         struct nvkm_namedb *namedb;
 462         struct nvkm_object *object;
 463         int ret;
 464
 465         while ((object = parent->object), nr--) {
 466                 nv_ioctl(object, "path 0x%08x\n", path[nr]);
 467                 if (!nv_iclass(object, NV_PARENT_CLASS)) {
 468                         nv_debug(object, "cannot have children (path)\n");
 469                         return -EINVAL;
 470                 }
 471
 472                 if (!(namedb = (void *)nv_pclass(object, NV_NAMEDB_CLASS)) ||
 473                     !(handle = nvkm_namedb_get(namedb, path[nr]))) {
 474                         nv_debug(object, "handle 0x%08x not found\n", path[nr]);
 475                         return -ENOENT;
 476                 }
 477                 nvkm_namedb_put(handle);
 478                 parent = handle;
 479         }
 480
 481         if (owner != NVIF_IOCTL_V0_OWNER_ANY && owner != handle->route) {
 482                 nv_ioctl(object, "object route != owner\n");
 483                 return -EACCES;
 484         }
 485         *route = handle->route;
 486         *token = handle->token;
 487
 488         if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
 489                 if (nvkm_ioctl_v0[type].version == 0)
 490                         ret = nvkm_ioctl_v0[type].func(handle, data, size);
 491         }
 492
 493         return ret;
 494 }
 495
 496 int
 497 nvkm_ioctl(struct nvkm_client *client, bool supervisor,
 498            void *data, u32 size, void **hack)
 499 {
 500         union {
 501                 struct nvif_ioctl_v0 v0;
 502         } *args = data;
 503         int ret;
 504
 505         client->super = supervisor;
 506         nv_ioctl(client, "size %d\n", size);
 507
 508         if (nvif_unpack(args->v0, 0, 0, true)) {
 509                 nv_ioctl(client, "vers %d type %02x path %d owner %02x\n",
 510                          args->v0.version, args->v0.type, args->v0.path_nr,
 511                          args->v0.owner);
 512                 ret = nvkm_ioctl_path(client->root, args->v0.type,
 513                                       args->v0.path_nr, args->v0.path,
 514                                       data, size, args->v0.owner,
 515                                       &args->v0.route, &args->v0.token);
 516         }
 517
 518         nv_ioctl(client, "return %d\n", ret);
 519         if (hack) {
 520                 *hack = client->data;
 521                 client->data = NULL;
 522         }
 523
 524         client->super = false;
 525         return ret;
 526 }