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