drivers/gpu/drm/vmwgfx/vmwgfx_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2012 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include "vmwgfx_resource_priv.h"
  30 #include "ttm/ttm_placement.h"
  31
  32 struct vmw_user_context {
  33         struct ttm_base_object base;
  34         struct vmw_resource res;
  35         struct vmw_ctx_binding_state cbs;
  36 };
  37
  38
  39
  40 typedef int (*vmw_scrub_func)(struct vmw_ctx_bindinfo *);
  41
  42 static void vmw_user_context_free(struct vmw_resource *res);
  43 static struct vmw_resource *
  44 vmw_user_context_base_to_res(struct ttm_base_object *base);
  45
  46 static int vmw_gb_context_create(struct vmw_resource *res);
  47 static int vmw_gb_context_bind(struct vmw_resource *res,
  48                                struct ttm_validate_buffer *val_buf);
  49 static int vmw_gb_context_unbind(struct vmw_resource *res,
  50                                  bool readback,
  51                                  struct ttm_validate_buffer *val_buf);
  52 static int vmw_gb_context_destroy(struct vmw_resource *res);
  53 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi);
  54 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi);
  55 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi);
  56 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs);
  57 static uint64_t vmw_user_context_size;
  58
  59 static const struct vmw_user_resource_conv user_context_conv = {
  60         .object_type = VMW_RES_CONTEXT,
  61         .base_obj_to_res = vmw_user_context_base_to_res,
  62         .res_free = vmw_user_context_free
  63 };
  64
  65 const struct vmw_user_resource_conv *user_context_converter =
  66         &user_context_conv;
  67
  68
  69 static const struct vmw_res_func vmw_legacy_context_func = {
  70         .res_type = vmw_res_context,
  71         .needs_backup = false,
  72         .may_evict = false,
  73         .type_name = "legacy contexts",
  74         .backup_placement = NULL,
  75         .create = NULL,
  76         .destroy = NULL,
  77         .bind = NULL,
  78         .unbind = NULL
  79 };
  80
  81 static const struct vmw_res_func vmw_gb_context_func = {
  82         .res_type = vmw_res_context,
  83         .needs_backup = true,
  84         .may_evict = true,
  85         .type_name = "guest backed contexts",
  86         .backup_placement = &vmw_mob_placement,
  87         .create = vmw_gb_context_create,
  88         .destroy = vmw_gb_context_destroy,
  89         .bind = vmw_gb_context_bind,
  90         .unbind = vmw_gb_context_unbind
  91 };
  92
  93 static const vmw_scrub_func vmw_scrub_funcs[vmw_ctx_binding_max] = {
  94         [vmw_ctx_binding_shader] = vmw_context_scrub_shader,
  95         [vmw_ctx_binding_rt] = vmw_context_scrub_render_target,
  96         [vmw_ctx_binding_tex] = vmw_context_scrub_texture };
  97
  98 /**
  99  * Context management:
 100  */
 101
 102 static void vmw_hw_context_destroy(struct vmw_resource *res)
 103 {
 104
 105         struct vmw_private *dev_priv = res->dev_priv;
 106         struct {
 107                 SVGA3dCmdHeader header;
 108                 SVGA3dCmdDestroyContext body;
 109         } *cmd;
 110
 111
 112         if (res->func->destroy == vmw_gb_context_destroy) {
 113                 mutex_lock(&dev_priv->cmdbuf_mutex);
 114                 (void) vmw_gb_context_destroy(res);
 115                 if (dev_priv->pinned_bo != NULL &&
 116                     !dev_priv->query_cid_valid)
 117                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 118                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 119                 return;
 120         }
 121
 122         vmw_execbuf_release_pinned_bo(dev_priv);
 123         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 124         if (unlikely(cmd == NULL)) {
 125                 DRM_ERROR("Failed reserving FIFO space for surface "
 126                           "destruction.\n");
 127                 return;
 128         }
 129
 130         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
 131         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 132         cmd->body.cid = cpu_to_le32(res->id);
 133
 134         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 135         vmw_3d_resource_dec(dev_priv, false);
 136 }
 137
 138 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 139                                struct vmw_resource *res,
 140                                void (*res_free) (struct vmw_resource *res))
 141 {
 142         int ret;
 143         struct vmw_user_context *uctx =
 144                 container_of(res, struct vmw_user_context, res);
 145
 146         ret = vmw_resource_init(dev_priv, res, true,
 147                                 res_free, &vmw_gb_context_func);
 148         res->backup_size = SVGA3D_CONTEXT_DATA_SIZE;
 149
 150         if (unlikely(ret != 0)) {
 151                 if (res_free)
 152                         res_free(res);
 153                 else
 154                         kfree(res);
 155                 return ret;
 156         }
 157
 158         memset(&uctx->cbs, 0, sizeof(uctx->cbs));
 159         INIT_LIST_HEAD(&uctx->cbs.list);
 160
 161         vmw_resource_activate(res, vmw_hw_context_destroy);
 162         return 0;
 163 }
 164
 165 static int vmw_context_init(struct vmw_private *dev_priv,
 166                             struct vmw_resource *res,
 167                             void (*res_free) (struct vmw_resource *res))
 168 {
 169         int ret;
 170
 171         struct {
 172                 SVGA3dCmdHeader header;
 173                 SVGA3dCmdDefineContext body;
 174         } *cmd;
 175
 176         if (dev_priv->has_mob)
 177                 return vmw_gb_context_init(dev_priv, res, res_free);
 178
 179         ret = vmw_resource_init(dev_priv, res, false,
 180                                 res_free, &vmw_legacy_context_func);
 181
 182         if (unlikely(ret != 0)) {
 183                 DRM_ERROR("Failed to allocate a resource id.\n");
 184                 goto out_early;
 185         }
 186
 187         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 188                 DRM_ERROR("Out of hw context ids.\n");
 189                 vmw_resource_unreference(&res);
 190                 return -ENOMEM;
 191         }
 192
 193         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 194         if (unlikely(cmd == NULL)) {
 195                 DRM_ERROR("Fifo reserve failed.\n");
 196                 vmw_resource_unreference(&res);
 197                 return -ENOMEM;
 198         }
 199
 200         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 201         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 202         cmd->body.cid = cpu_to_le32(res->id);
 203
 204         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 205         (void) vmw_3d_resource_inc(dev_priv, false);
 206         vmw_resource_activate(res, vmw_hw_context_destroy);
 207         return 0;
 208
 209 out_early:
 210         if (res_free == NULL)
 211                 kfree(res);
 212         else
 213                 res_free(res);
 214         return ret;
 215 }
 216
 217 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 218 {
 219         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 220         int ret;
 221
 222         if (unlikely(res == NULL))
 223                 return NULL;
 224
 225         ret = vmw_context_init(dev_priv, res, NULL);
 226
 227         return (ret == 0) ? res : NULL;
 228 }
 229
 230
 231 static int vmw_gb_context_create(struct vmw_resource *res)
 232 {
 233         struct vmw_private *dev_priv = res->dev_priv;
 234         int ret;
 235         struct {
 236                 SVGA3dCmdHeader header;
 237                 SVGA3dCmdDefineGBContext body;
 238         } *cmd;
 239
 240         if (likely(res->id != -1))
 241                 return 0;
 242
 243         ret = vmw_resource_alloc_id(res);
 244         if (unlikely(ret != 0)) {
 245                 DRM_ERROR("Failed to allocate a context id.\n");
 246                 goto out_no_id;
 247         }
 248
 249         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 250                 ret = -EBUSY;
 251                 goto out_no_fifo;
 252         }
 253
 254         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 255         if (unlikely(cmd == NULL)) {
 256                 DRM_ERROR("Failed reserving FIFO space for context "
 257                           "creation.\n");
 258                 ret = -ENOMEM;
 259                 goto out_no_fifo;
 260         }
 261
 262         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 263         cmd->header.size = sizeof(cmd->body);
 264         cmd->body.cid = res->id;
 265         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 266         (void) vmw_3d_resource_inc(dev_priv, false);
 267
 268         return 0;
 269
 270 out_no_fifo:
 271         vmw_resource_release_id(res);
 272 out_no_id:
 273         return ret;
 274 }
 275
 276 static int vmw_gb_context_bind(struct vmw_resource *res,
 277                                struct ttm_validate_buffer *val_buf)
 278 {
 279         struct vmw_private *dev_priv = res->dev_priv;
 280         struct {
 281                 SVGA3dCmdHeader header;
 282                 SVGA3dCmdBindGBContext body;
 283         } *cmd;
 284         struct ttm_buffer_object *bo = val_buf->bo;
 285
 286         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 287
 288         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 289         if (unlikely(cmd == NULL)) {
 290                 DRM_ERROR("Failed reserving FIFO space for context "
 291                           "binding.\n");
 292                 return -ENOMEM;
 293         }
 294
 295         cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 296         cmd->header.size = sizeof(cmd->body);
 297         cmd->body.cid = res->id;
 298         cmd->body.mobid = bo->mem.start;
 299         cmd->body.validContents = res->backup_dirty;
 300         res->backup_dirty = false;
 301         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 302
 303         return 0;
 304 }
 305
 306 static int vmw_gb_context_unbind(struct vmw_resource *res,
 307                                  bool readback,
 308                                  struct ttm_validate_buffer *val_buf)
 309 {
 310         struct vmw_private *dev_priv = res->dev_priv;
 311         struct ttm_buffer_object *bo = val_buf->bo;
 312         struct vmw_fence_obj *fence;
 313         struct vmw_user_context *uctx =
 314                 container_of(res, struct vmw_user_context, res);
 315
 316         struct {
 317                 SVGA3dCmdHeader header;
 318                 SVGA3dCmdReadbackGBContext body;
 319         } *cmd1;
 320         struct {
 321                 SVGA3dCmdHeader header;
 322                 SVGA3dCmdBindGBContext body;
 323         } *cmd2;
 324         uint32_t submit_size;
 325         uint8_t *cmd;
 326
 327
 328         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 329
 330         mutex_lock(&dev_priv->binding_mutex);
 331         vmw_context_binding_state_kill(&uctx->cbs);
 332
 333         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 334
 335         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 336         if (unlikely(cmd == NULL)) {
 337                 DRM_ERROR("Failed reserving FIFO space for context "
 338                           "unbinding.\n");
 339                 mutex_unlock(&dev_priv->binding_mutex);
 340                 return -ENOMEM;
 341         }
 342
 343         cmd2 = (void *) cmd;
 344         if (readback) {
 345                 cmd1 = (void *) cmd;
 346                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 347                 cmd1->header.size = sizeof(cmd1->body);
 348                 cmd1->body.cid = res->id;
 349                 cmd2 = (void *) (&cmd1[1]);
 350         }
 351         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 352         cmd2->header.size = sizeof(cmd2->body);
 353         cmd2->body.cid = res->id;
 354         cmd2->body.mobid = SVGA3D_INVALID_ID;
 355
 356         vmw_fifo_commit(dev_priv, submit_size);
 357         mutex_unlock(&dev_priv->binding_mutex);
 358
 359         /*
 360          * Create a fence object and fence the backup buffer.
 361          */
 362
 363         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 364                                           &fence, NULL);
 365
 366         vmw_fence_single_bo(bo, fence);
 367
 368         if (likely(fence != NULL))
 369                 vmw_fence_obj_unreference(&fence);
 370
 371         return 0;
 372 }
 373
 374 static int vmw_gb_context_destroy(struct vmw_resource *res)
 375 {
 376         struct vmw_private *dev_priv = res->dev_priv;
 377         struct {
 378                 SVGA3dCmdHeader header;
 379                 SVGA3dCmdDestroyGBContext body;
 380         } *cmd;
 381         struct vmw_user_context *uctx =
 382                 container_of(res, struct vmw_user_context, res);
 383
 384         BUG_ON(!list_empty(&uctx->cbs.list));
 385
 386         if (likely(res->id == -1))
 387                 return 0;
 388
 389         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 390         if (unlikely(cmd == NULL)) {
 391                 DRM_ERROR("Failed reserving FIFO space for context "
 392                           "destruction.\n");
 393                 return -ENOMEM;
 394         }
 395
 396         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 397         cmd->header.size = sizeof(cmd->body);
 398         cmd->body.cid = res->id;
 399         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 400         if (dev_priv->query_cid == res->id)
 401                 dev_priv->query_cid_valid = false;
 402         vmw_resource_release_id(res);
 403         vmw_3d_resource_dec(dev_priv, false);
 404
 405         return 0;
 406 }
 407
 408 /**
 409  * User-space context management:
 410  */
 411
 412 static struct vmw_resource *
 413 vmw_user_context_base_to_res(struct ttm_base_object *base)
 414 {
 415         return &(container_of(base, struct vmw_user_context, base)->res);
 416 }
 417
 418 static void vmw_user_context_free(struct vmw_resource *res)
 419 {
 420         struct vmw_user_context *ctx =
 421             container_of(res, struct vmw_user_context, res);
 422         struct vmw_private *dev_priv = res->dev_priv;
 423
 424         ttm_base_object_kfree(ctx, base);
 425         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 426                             vmw_user_context_size);
 427 }
 428
 429 /**
 430  * This function is called when user space has no more references on the
 431  * base object. It releases the base-object's reference on the resource object.
 432  */
 433
 434 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 435 {
 436         struct ttm_base_object *base = *p_base;
 437         struct vmw_user_context *ctx =
 438             container_of(base, struct vmw_user_context, base);
 439         struct vmw_resource *res = &ctx->res;
 440
 441         *p_base = NULL;
 442         vmw_resource_unreference(&res);
 443 }
 444
 445 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 446                               struct drm_file *file_priv)
 447 {
 448         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 449         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 450
 451         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 452 }
 453
 454 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 455                              struct drm_file *file_priv)
 456 {
 457         struct vmw_private *dev_priv = vmw_priv(dev);
 458         struct vmw_user_context *ctx;
 459         struct vmw_resource *res;
 460         struct vmw_resource *tmp;
 461         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 462         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 463         struct vmw_master *vmaster = vmw_master(file_priv->master);
 464         int ret;
 465
 466
 467         /*
 468          * Approximate idr memory usage with 128 bytes. It will be limited
 469          * by maximum number_of contexts anyway.
 470          */
 471
 472         if (unlikely(vmw_user_context_size == 0))
 473                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128;
 474
 475         ret = ttm_read_lock(&vmaster->lock, true);
 476         if (unlikely(ret != 0))
 477                 return ret;
 478
 479         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 480                                    vmw_user_context_size,
 481                                    false, true);
 482         if (unlikely(ret != 0)) {
 483                 if (ret != -ERESTARTSYS)
 484                         DRM_ERROR("Out of graphics memory for context"
 485                                   " creation.\n");
 486                 goto out_unlock;
 487         }
 488
 489         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 490         if (unlikely(ctx == NULL)) {
 491                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 492                                     vmw_user_context_size);
 493                 ret = -ENOMEM;
 494                 goto out_unlock;
 495         }
 496
 497         res = &ctx->res;
 498         ctx->base.shareable = false;
 499         ctx->base.tfile = NULL;
 500
 501         /*
 502          * From here on, the destructor takes over resource freeing.
 503          */
 504
 505         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 506         if (unlikely(ret != 0))
 507                 goto out_unlock;
 508
 509         tmp = vmw_resource_reference(&ctx->res);
 510         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 511                                    &vmw_user_context_base_release, NULL);
 512
 513         if (unlikely(ret != 0)) {
 514                 vmw_resource_unreference(&tmp);
 515                 goto out_err;
 516         }
 517
 518         arg->cid = ctx->base.hash.key;
 519 out_err:
 520         vmw_resource_unreference(&res);
 521 out_unlock:
 522         ttm_read_unlock(&vmaster->lock);
 523         return ret;
 524
 525 }
 526
 527 /**
 528  * vmw_context_scrub_shader - scrub a shader binding from a context.
 529  *
 530  * @bi: single binding information.
 531  */
 532 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi)
 533 {
 534         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 535         struct {
 536                 SVGA3dCmdHeader header;
 537                 SVGA3dCmdSetShader body;
 538         } *cmd;
 539
 540         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 541         if (unlikely(cmd == NULL)) {
 542                 DRM_ERROR("Failed reserving FIFO space for shader "
 543                           "unbinding.\n");
 544                 return -ENOMEM;
 545         }
 546
 547         cmd->header.id = SVGA_3D_CMD_SET_SHADER;
 548         cmd->header.size = sizeof(cmd->body);
 549         cmd->body.cid = bi->ctx->id;
 550         cmd->body.type = bi->i1.shader_type;
 551         cmd->body.shid = SVGA3D_INVALID_ID;
 552         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 553
 554         return 0;
 555 }
 556
 557 /**
 558  * vmw_context_scrub_render_target - scrub a render target binding
 559  * from a context.
 560  *
 561  * @bi: single binding information.
 562  */
 563 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi)
 564 {
 565         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 566         struct {
 567                 SVGA3dCmdHeader header;
 568                 SVGA3dCmdSetRenderTarget body;
 569         } *cmd;
 570
 571         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 572         if (unlikely(cmd == NULL)) {
 573                 DRM_ERROR("Failed reserving FIFO space for render target "
 574                           "unbinding.\n");
 575                 return -ENOMEM;
 576         }
 577
 578         cmd->header.id = SVGA_3D_CMD_SETRENDERTARGET;
 579         cmd->header.size = sizeof(cmd->body);
 580         cmd->body.cid = bi->ctx->id;
 581         cmd->body.type = bi->i1.rt_type;
 582         cmd->body.target.sid = SVGA3D_INVALID_ID;
 583         cmd->body.target.face = 0;
 584         cmd->body.target.mipmap = 0;
 585         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 586
 587         return 0;
 588 }
 589
 590 /**
 591  * vmw_context_scrub_texture - scrub a texture binding from a context.
 592  *
 593  * @bi: single binding information.
 594  *
 595  * TODO: Possibly complement this function with a function that takes
 596  * a list of texture bindings and combines them to a single command.
 597  */
 598 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi)
 599 {
 600         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 601         struct {
 602                 SVGA3dCmdHeader header;
 603                 struct {
 604                         SVGA3dCmdSetTextureState c;
 605                         SVGA3dTextureState s1;
 606                 } body;
 607         } *cmd;
 608
 609         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 610         if (unlikely(cmd == NULL)) {
 611                 DRM_ERROR("Failed reserving FIFO space for texture "
 612                           "unbinding.\n");
 613                 return -ENOMEM;
 614         }
 615
 616
 617         cmd->header.id = SVGA_3D_CMD_SETTEXTURESTATE;
 618         cmd->header.size = sizeof(cmd->body);
 619         cmd->body.c.cid = bi->ctx->id;
 620         cmd->body.s1.stage = bi->i1.texture_stage;
 621         cmd->body.s1.name = SVGA3D_TS_BIND_TEXTURE;
 622         cmd->body.s1.value = (uint32) SVGA3D_INVALID_ID;
 623         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 624
 625         return 0;
 626 }
 627
 628 /**
 629  * vmw_context_binding_drop: Stop tracking a context binding
 630  *
 631  * @cb: Pointer to binding tracker storage.
 632  *
 633  * Stops tracking a context binding, and re-initializes its storage.
 634  * Typically used when the context binding is replaced with a binding to
 635  * another (or the same, for that matter) resource.
 636  */
 637 static void vmw_context_binding_drop(struct vmw_ctx_binding *cb)
 638 {
 639         list_del(&cb->ctx_list);
 640         if (!list_empty(&cb->res_list))
 641                 list_del(&cb->res_list);
 642         cb->bi.ctx = NULL;
 643 }
 644
 645 /**
 646  * vmw_context_binding_add: Start tracking a context binding
 647  *
 648  * @cbs: Pointer to the context binding state tracker.
 649  * @bi: Information about the binding to track.
 650  *
 651  * Performs basic checks on the binding to make sure arguments are within
 652  * bounds and then starts tracking the binding in the context binding
 653  * state structure @cbs.
 654  */
 655 int vmw_context_binding_add(struct vmw_ctx_binding_state *cbs,
 656                             const struct vmw_ctx_bindinfo *bi)
 657 {
 658         struct vmw_ctx_binding *loc;
 659
 660         switch (bi->bt) {
 661         case vmw_ctx_binding_rt:
 662                 if (unlikely((unsigned)bi->i1.rt_type >= SVGA3D_RT_MAX)) {
 663                         DRM_ERROR("Illegal render target type %u.\n",
 664                                   (unsigned) bi->i1.rt_type);
 665                         return -EINVAL;
 666                 }
 667                 loc = &cbs->render_targets[bi->i1.rt_type];
 668                 break;
 669         case vmw_ctx_binding_tex:
 670                 if (unlikely((unsigned)bi->i1.texture_stage >=
 671                              SVGA3D_NUM_TEXTURE_UNITS)) {
 672                         DRM_ERROR("Illegal texture/sampler unit %u.\n",
 673                                   (unsigned) bi->i1.texture_stage);
 674                         return -EINVAL;
 675                 }
 676                 loc = &cbs->texture_units[bi->i1.texture_stage];
 677                 break;
 678         case vmw_ctx_binding_shader:
 679                 if (unlikely((unsigned)bi->i1.shader_type >=
 680                              SVGA3D_SHADERTYPE_MAX)) {
 681                         DRM_ERROR("Illegal shader type %u.\n",
 682                                   (unsigned) bi->i1.shader_type);
 683                         return -EINVAL;
 684                 }
 685                 loc = &cbs->shaders[bi->i1.shader_type];
 686                 break;
 687         default:
 688                 BUG();
 689         }
 690
 691         if (loc->bi.ctx != NULL)
 692                 vmw_context_binding_drop(loc);
 693
 694         loc->bi = *bi;
 695         list_add_tail(&loc->ctx_list, &cbs->list);
 696         INIT_LIST_HEAD(&loc->res_list);
 697
 698         return 0;
 699 }
 700
 701 /**
 702  * vmw_context_binding_transfer: Transfer a context binding tracking entry.
 703  *
 704  * @cbs: Pointer to the persistent context binding state tracker.
 705  * @bi: Information about the binding to track.
 706  *
 707  */
 708 static void vmw_context_binding_transfer(struct vmw_ctx_binding_state *cbs,
 709                                          const struct vmw_ctx_bindinfo *bi)
 710 {
 711         struct vmw_ctx_binding *loc;
 712
 713         switch (bi->bt) {
 714         case vmw_ctx_binding_rt:
 715                 loc = &cbs->render_targets[bi->i1.rt_type];
 716                 break;
 717         case vmw_ctx_binding_tex:
 718                 loc = &cbs->texture_units[bi->i1.texture_stage];
 719                 break;
 720         case vmw_ctx_binding_shader:
 721                 loc = &cbs->shaders[bi->i1.shader_type];
 722                 break;
 723         default:
 724                 BUG();
 725         }
 726
 727         if (loc->bi.ctx != NULL)
 728                 vmw_context_binding_drop(loc);
 729
 730         loc->bi = *bi;
 731         list_add_tail(&loc->ctx_list, &cbs->list);
 732         if (bi->res != NULL)
 733                 list_add_tail(&loc->res_list, &bi->res->binding_head);
 734         else
 735                 INIT_LIST_HEAD(&loc->res_list);
 736 }
 737
 738 /**
 739  * vmw_context_binding_kill - Kill a binding on the device
 740  * and stop tracking it.
 741  *
 742  * @cb: Pointer to binding tracker storage.
 743  *
 744  * Emits FIFO commands to scrub a binding represented by @cb.
 745  * Then stops tracking the binding and re-initializes its storage.
 746  */
 747 static void vmw_context_binding_kill(struct vmw_ctx_binding *cb)
 748 {
 749         (void) vmw_scrub_funcs[cb->bi.bt](&cb->bi);
 750         vmw_context_binding_drop(cb);
 751 }
 752
 753 /**
 754  * vmw_context_binding_state_kill - Kill all bindings associated with a
 755  * struct vmw_ctx_binding state structure, and re-initialize the structure.
 756  *
 757  * @cbs: Pointer to the context binding state tracker.
 758  *
 759  * Emits commands to scrub all bindings associated with the
 760  * context binding state tracker. Then re-initializes the whole structure.
 761  */
 762 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs)
 763 {
 764         struct vmw_ctx_binding *entry, *next;
 765
 766         list_for_each_entry_safe(entry, next, &cbs->list, ctx_list)
 767                 vmw_context_binding_kill(entry);
 768 }
 769
 770 /**
 771  * vmw_context_binding_res_list_kill - Kill all bindings on a
 772  * resource binding list
 773  *
 774  * @head: list head of resource binding list
 775  *
 776  * Kills all bindings associated with a specific resource. Typically
 777  * called before the resource is destroyed.
 778  */
 779 void vmw_context_binding_res_list_kill(struct list_head *head)
 780 {
 781         struct vmw_ctx_binding *entry, *next;
 782
 783         list_for_each_entry_safe(entry, next, head, res_list)
 784                 vmw_context_binding_kill(entry);
 785 }
 786
 787 /**
 788  * vmw_context_binding_state_transfer - Commit staged binding info
 789  *
 790  * @ctx: Pointer to context to commit the staged binding info to.
 791  * @from: Staged binding info built during execbuf.
 792  *
 793  * Transfers binding info from a temporary structure to the persistent
 794  * structure in the context. This can be done once commands
 795  */
 796 void vmw_context_binding_state_transfer(struct vmw_resource *ctx,
 797                                         struct vmw_ctx_binding_state *from)
 798 {
 799         struct vmw_user_context *uctx =
 800                 container_of(ctx, struct vmw_user_context, res);
 801         struct vmw_ctx_binding *entry, *next;
 802
 803         list_for_each_entry_safe(entry, next, &from->list, ctx_list)
 804                 vmw_context_binding_transfer(&uctx->cbs, &entry->bi);
 805 }