kernel/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         struct vmw_cmdbuf_res_manager *man;
  37 };
  38
  39
  40
  41 typedef int (*vmw_scrub_func)(struct vmw_ctx_bindinfo *, bool);
  42
  43 static void vmw_user_context_free(struct vmw_resource *res);
  44 static struct vmw_resource *
  45 vmw_user_context_base_to_res(struct ttm_base_object *base);
  46
  47 static int vmw_gb_context_create(struct vmw_resource *res);
  48 static int vmw_gb_context_bind(struct vmw_resource *res,
  49                                struct ttm_validate_buffer *val_buf);
  50 static int vmw_gb_context_unbind(struct vmw_resource *res,
  51                                  bool readback,
  52                                  struct ttm_validate_buffer *val_buf);
  53 static int vmw_gb_context_destroy(struct vmw_resource *res);
  54 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind);
  55 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi,
  56                                            bool rebind);
  57 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi, bool rebind);
  58 static void vmw_context_binding_state_scrub(struct vmw_ctx_binding_state *cbs);
  59 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs);
  60 static uint64_t vmw_user_context_size;
  61
  62 static const struct vmw_user_resource_conv user_context_conv = {
  63         .object_type = VMW_RES_CONTEXT,
  64         .base_obj_to_res = vmw_user_context_base_to_res,
  65         .res_free = vmw_user_context_free
  66 };
  67
  68 const struct vmw_user_resource_conv *user_context_converter =
  69         &user_context_conv;
  70
  71
  72 static const struct vmw_res_func vmw_legacy_context_func = {
  73         .res_type = vmw_res_context,
  74         .needs_backup = false,
  75         .may_evict = false,
  76         .type_name = "legacy contexts",
  77         .backup_placement = NULL,
  78         .create = NULL,
  79         .destroy = NULL,
  80         .bind = NULL,
  81         .unbind = NULL
  82 };
  83
  84 static const struct vmw_res_func vmw_gb_context_func = {
  85         .res_type = vmw_res_context,
  86         .needs_backup = true,
  87         .may_evict = true,
  88         .type_name = "guest backed contexts",
  89         .backup_placement = &vmw_mob_placement,
  90         .create = vmw_gb_context_create,
  91         .destroy = vmw_gb_context_destroy,
  92         .bind = vmw_gb_context_bind,
  93         .unbind = vmw_gb_context_unbind
  94 };
  95
  96 static const vmw_scrub_func vmw_scrub_funcs[vmw_ctx_binding_max] = {
  97         [vmw_ctx_binding_shader] = vmw_context_scrub_shader,
  98         [vmw_ctx_binding_rt] = vmw_context_scrub_render_target,
  99         [vmw_ctx_binding_tex] = vmw_context_scrub_texture };
 100
 101 /**
 102  * Context management:
 103  */
 104
 105 static void vmw_hw_context_destroy(struct vmw_resource *res)
 106 {
 107         struct vmw_user_context *uctx =
 108                 container_of(res, struct vmw_user_context, res);
 109         struct vmw_private *dev_priv = res->dev_priv;
 110         struct {
 111                 SVGA3dCmdHeader header;
 112                 SVGA3dCmdDestroyContext body;
 113         } *cmd;
 114
 115
 116         if (res->func->destroy == vmw_gb_context_destroy) {
 117                 mutex_lock(&dev_priv->cmdbuf_mutex);
 118                 vmw_cmdbuf_res_man_destroy(uctx->man);
 119                 mutex_lock(&dev_priv->binding_mutex);
 120                 (void) vmw_context_binding_state_kill(&uctx->cbs);
 121                 (void) vmw_gb_context_destroy(res);
 122                 mutex_unlock(&dev_priv->binding_mutex);
 123                 if (dev_priv->pinned_bo != NULL &&
 124                     !dev_priv->query_cid_valid)
 125                         __vmw_execbuf_release_pinned_bo(dev_priv, NULL);
 126                 mutex_unlock(&dev_priv->cmdbuf_mutex);
 127                 return;
 128         }
 129
 130         vmw_execbuf_release_pinned_bo(dev_priv);
 131         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 132         if (unlikely(cmd == NULL)) {
 133                 DRM_ERROR("Failed reserving FIFO space for surface "
 134                           "destruction.\n");
 135                 return;
 136         }
 137
 138         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
 139         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 140         cmd->body.cid = cpu_to_le32(res->id);
 141
 142         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 143         vmw_3d_resource_dec(dev_priv, false);
 144 }
 145
 146 static int vmw_gb_context_init(struct vmw_private *dev_priv,
 147                                struct vmw_resource *res,
 148                                void (*res_free) (struct vmw_resource *res))
 149 {
 150         int ret;
 151         struct vmw_user_context *uctx =
 152                 container_of(res, struct vmw_user_context, res);
 153
 154         ret = vmw_resource_init(dev_priv, res, true,
 155                                 res_free, &vmw_gb_context_func);
 156         res->backup_size = SVGA3D_CONTEXT_DATA_SIZE;
 157         if (unlikely(ret != 0))
 158                 goto out_err;
 159
 160         if (dev_priv->has_mob) {
 161                 uctx->man = vmw_cmdbuf_res_man_create(dev_priv);
 162                 if (unlikely(IS_ERR(uctx->man))) {
 163                         ret = PTR_ERR(uctx->man);
 164                         uctx->man = NULL;
 165                         goto out_err;
 166                 }
 167         }
 168
 169         memset(&uctx->cbs, 0, sizeof(uctx->cbs));
 170         INIT_LIST_HEAD(&uctx->cbs.list);
 171
 172         vmw_resource_activate(res, vmw_hw_context_destroy);
 173         return 0;
 174
 175 out_err:
 176         if (res_free)
 177                 res_free(res);
 178         else
 179                 kfree(res);
 180         return ret;
 181 }
 182
 183 static int vmw_context_init(struct vmw_private *dev_priv,
 184                             struct vmw_resource *res,
 185                             void (*res_free) (struct vmw_resource *res))
 186 {
 187         int ret;
 188
 189         struct {
 190                 SVGA3dCmdHeader header;
 191                 SVGA3dCmdDefineContext body;
 192         } *cmd;
 193
 194         if (dev_priv->has_mob)
 195                 return vmw_gb_context_init(dev_priv, res, res_free);
 196
 197         ret = vmw_resource_init(dev_priv, res, false,
 198                                 res_free, &vmw_legacy_context_func);
 199
 200         if (unlikely(ret != 0)) {
 201                 DRM_ERROR("Failed to allocate a resource id.\n");
 202                 goto out_early;
 203         }
 204
 205         if (unlikely(res->id >= SVGA3D_MAX_CONTEXT_IDS)) {
 206                 DRM_ERROR("Out of hw context ids.\n");
 207                 vmw_resource_unreference(&res);
 208                 return -ENOMEM;
 209         }
 210
 211         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 212         if (unlikely(cmd == NULL)) {
 213                 DRM_ERROR("Fifo reserve failed.\n");
 214                 vmw_resource_unreference(&res);
 215                 return -ENOMEM;
 216         }
 217
 218         cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
 219         cmd->header.size = cpu_to_le32(sizeof(cmd->body));
 220         cmd->body.cid = cpu_to_le32(res->id);
 221
 222         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 223         (void) vmw_3d_resource_inc(dev_priv, false);
 224         vmw_resource_activate(res, vmw_hw_context_destroy);
 225         return 0;
 226
 227 out_early:
 228         if (res_free == NULL)
 229                 kfree(res);
 230         else
 231                 res_free(res);
 232         return ret;
 233 }
 234
 235 struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
 236 {
 237         struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
 238         int ret;
 239
 240         if (unlikely(res == NULL))
 241                 return NULL;
 242
 243         ret = vmw_context_init(dev_priv, res, NULL);
 244
 245         return (ret == 0) ? res : NULL;
 246 }
 247
 248
 249 static int vmw_gb_context_create(struct vmw_resource *res)
 250 {
 251         struct vmw_private *dev_priv = res->dev_priv;
 252         int ret;
 253         struct {
 254                 SVGA3dCmdHeader header;
 255                 SVGA3dCmdDefineGBContext body;
 256         } *cmd;
 257
 258         if (likely(res->id != -1))
 259                 return 0;
 260
 261         ret = vmw_resource_alloc_id(res);
 262         if (unlikely(ret != 0)) {
 263                 DRM_ERROR("Failed to allocate a context id.\n");
 264                 goto out_no_id;
 265         }
 266
 267         if (unlikely(res->id >= VMWGFX_NUM_GB_CONTEXT)) {
 268                 ret = -EBUSY;
 269                 goto out_no_fifo;
 270         }
 271
 272         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 273         if (unlikely(cmd == NULL)) {
 274                 DRM_ERROR("Failed reserving FIFO space for context "
 275                           "creation.\n");
 276                 ret = -ENOMEM;
 277                 goto out_no_fifo;
 278         }
 279
 280         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_CONTEXT;
 281         cmd->header.size = sizeof(cmd->body);
 282         cmd->body.cid = res->id;
 283         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 284         (void) vmw_3d_resource_inc(dev_priv, false);
 285
 286         return 0;
 287
 288 out_no_fifo:
 289         vmw_resource_release_id(res);
 290 out_no_id:
 291         return ret;
 292 }
 293
 294 static int vmw_gb_context_bind(struct vmw_resource *res,
 295                                struct ttm_validate_buffer *val_buf)
 296 {
 297         struct vmw_private *dev_priv = res->dev_priv;
 298         struct {
 299                 SVGA3dCmdHeader header;
 300                 SVGA3dCmdBindGBContext body;
 301         } *cmd;
 302         struct ttm_buffer_object *bo = val_buf->bo;
 303
 304         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 305
 306         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 307         if (unlikely(cmd == NULL)) {
 308                 DRM_ERROR("Failed reserving FIFO space for context "
 309                           "binding.\n");
 310                 return -ENOMEM;
 311         }
 312
 313         cmd->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 314         cmd->header.size = sizeof(cmd->body);
 315         cmd->body.cid = res->id;
 316         cmd->body.mobid = bo->mem.start;
 317         cmd->body.validContents = res->backup_dirty;
 318         res->backup_dirty = false;
 319         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 320
 321         return 0;
 322 }
 323
 324 static int vmw_gb_context_unbind(struct vmw_resource *res,
 325                                  bool readback,
 326                                  struct ttm_validate_buffer *val_buf)
 327 {
 328         struct vmw_private *dev_priv = res->dev_priv;
 329         struct ttm_buffer_object *bo = val_buf->bo;
 330         struct vmw_fence_obj *fence;
 331         struct vmw_user_context *uctx =
 332                 container_of(res, struct vmw_user_context, res);
 333
 334         struct {
 335                 SVGA3dCmdHeader header;
 336                 SVGA3dCmdReadbackGBContext body;
 337         } *cmd1;
 338         struct {
 339                 SVGA3dCmdHeader header;
 340                 SVGA3dCmdBindGBContext body;
 341         } *cmd2;
 342         uint32_t submit_size;
 343         uint8_t *cmd;
 344
 345
 346         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 347
 348         mutex_lock(&dev_priv->binding_mutex);
 349         vmw_context_binding_state_scrub(&uctx->cbs);
 350
 351         submit_size = sizeof(*cmd2) + (readback ? sizeof(*cmd1) : 0);
 352
 353         cmd = vmw_fifo_reserve(dev_priv, submit_size);
 354         if (unlikely(cmd == NULL)) {
 355                 DRM_ERROR("Failed reserving FIFO space for context "
 356                           "unbinding.\n");
 357                 mutex_unlock(&dev_priv->binding_mutex);
 358                 return -ENOMEM;
 359         }
 360
 361         cmd2 = (void *) cmd;
 362         if (readback) {
 363                 cmd1 = (void *) cmd;
 364                 cmd1->header.id = SVGA_3D_CMD_READBACK_GB_CONTEXT;
 365                 cmd1->header.size = sizeof(cmd1->body);
 366                 cmd1->body.cid = res->id;
 367                 cmd2 = (void *) (&cmd1[1]);
 368         }
 369         cmd2->header.id = SVGA_3D_CMD_BIND_GB_CONTEXT;
 370         cmd2->header.size = sizeof(cmd2->body);
 371         cmd2->body.cid = res->id;
 372         cmd2->body.mobid = SVGA3D_INVALID_ID;
 373
 374         vmw_fifo_commit(dev_priv, submit_size);
 375         mutex_unlock(&dev_priv->binding_mutex);
 376
 377         /*
 378          * Create a fence object and fence the backup buffer.
 379          */
 380
 381         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 382                                           &fence, NULL);
 383
 384         vmw_fence_single_bo(bo, fence);
 385
 386         if (likely(fence != NULL))
 387                 vmw_fence_obj_unreference(&fence);
 388
 389         return 0;
 390 }
 391
 392 static int vmw_gb_context_destroy(struct vmw_resource *res)
 393 {
 394         struct vmw_private *dev_priv = res->dev_priv;
 395         struct {
 396                 SVGA3dCmdHeader header;
 397                 SVGA3dCmdDestroyGBContext body;
 398         } *cmd;
 399
 400         if (likely(res->id == -1))
 401                 return 0;
 402
 403         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 404         if (unlikely(cmd == NULL)) {
 405                 DRM_ERROR("Failed reserving FIFO space for context "
 406                           "destruction.\n");
 407                 return -ENOMEM;
 408         }
 409
 410         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_CONTEXT;
 411         cmd->header.size = sizeof(cmd->body);
 412         cmd->body.cid = res->id;
 413         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 414         if (dev_priv->query_cid == res->id)
 415                 dev_priv->query_cid_valid = false;
 416         vmw_resource_release_id(res);
 417         vmw_3d_resource_dec(dev_priv, false);
 418
 419         return 0;
 420 }
 421
 422 /**
 423  * User-space context management:
 424  */
 425
 426 static struct vmw_resource *
 427 vmw_user_context_base_to_res(struct ttm_base_object *base)
 428 {
 429         return &(container_of(base, struct vmw_user_context, base)->res);
 430 }
 431
 432 static void vmw_user_context_free(struct vmw_resource *res)
 433 {
 434         struct vmw_user_context *ctx =
 435             container_of(res, struct vmw_user_context, res);
 436         struct vmw_private *dev_priv = res->dev_priv;
 437
 438         ttm_base_object_kfree(ctx, base);
 439         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 440                             vmw_user_context_size);
 441 }
 442
 443 /**
 444  * This function is called when user space has no more references on the
 445  * base object. It releases the base-object's reference on the resource object.
 446  */
 447
 448 static void vmw_user_context_base_release(struct ttm_base_object **p_base)
 449 {
 450         struct ttm_base_object *base = *p_base;
 451         struct vmw_user_context *ctx =
 452             container_of(base, struct vmw_user_context, base);
 453         struct vmw_resource *res = &ctx->res;
 454
 455         *p_base = NULL;
 456         vmw_resource_unreference(&res);
 457 }
 458
 459 int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
 460                               struct drm_file *file_priv)
 461 {
 462         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 463         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 464
 465         return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
 466 }
 467
 468 int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 469                              struct drm_file *file_priv)
 470 {
 471         struct vmw_private *dev_priv = vmw_priv(dev);
 472         struct vmw_user_context *ctx;
 473         struct vmw_resource *res;
 474         struct vmw_resource *tmp;
 475         struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
 476         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 477         int ret;
 478
 479
 480         /*
 481          * Approximate idr memory usage with 128 bytes. It will be limited
 482          * by maximum number_of contexts anyway.
 483          */
 484
 485         if (unlikely(vmw_user_context_size == 0))
 486                 vmw_user_context_size = ttm_round_pot(sizeof(*ctx)) + 128 +
 487                   ((dev_priv->has_mob) ? vmw_cmdbuf_res_man_size() : 0);
 488
 489         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 490         if (unlikely(ret != 0))
 491                 return ret;
 492
 493         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 494                                    vmw_user_context_size,
 495                                    false, true);
 496         if (unlikely(ret != 0)) {
 497                 if (ret != -ERESTARTSYS)
 498                         DRM_ERROR("Out of graphics memory for context"
 499                                   " creation.\n");
 500                 goto out_unlock;
 501         }
 502
 503         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 504         if (unlikely(ctx == NULL)) {
 505                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 506                                     vmw_user_context_size);
 507                 ret = -ENOMEM;
 508                 goto out_unlock;
 509         }
 510
 511         res = &ctx->res;
 512         ctx->base.shareable = false;
 513         ctx->base.tfile = NULL;
 514
 515         /*
 516          * From here on, the destructor takes over resource freeing.
 517          */
 518
 519         ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
 520         if (unlikely(ret != 0))
 521                 goto out_unlock;
 522
 523         tmp = vmw_resource_reference(&ctx->res);
 524         ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
 525                                    &vmw_user_context_base_release, NULL);
 526
 527         if (unlikely(ret != 0)) {
 528                 vmw_resource_unreference(&tmp);
 529                 goto out_err;
 530         }
 531
 532         arg->cid = ctx->base.hash.key;
 533 out_err:
 534         vmw_resource_unreference(&res);
 535 out_unlock:
 536         ttm_read_unlock(&dev_priv->reservation_sem);
 537         return ret;
 538
 539 }
 540
 541 /**
 542  * vmw_context_scrub_shader - scrub a shader binding from a context.
 543  *
 544  * @bi: single binding information.
 545  * @rebind: Whether to issue a bind instead of scrub command.
 546  */
 547 static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind)
 548 {
 549         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 550         struct {
 551                 SVGA3dCmdHeader header;
 552                 SVGA3dCmdSetShader body;
 553         } *cmd;
 554
 555         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 556         if (unlikely(cmd == NULL)) {
 557                 DRM_ERROR("Failed reserving FIFO space for shader "
 558                           "unbinding.\n");
 559                 return -ENOMEM;
 560         }
 561
 562         cmd->header.id = SVGA_3D_CMD_SET_SHADER;
 563         cmd->header.size = sizeof(cmd->body);
 564         cmd->body.cid = bi->ctx->id;
 565         cmd->body.type = bi->i1.shader_type;
 566         cmd->body.shid = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 567         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 568
 569         return 0;
 570 }
 571
 572 /**
 573  * vmw_context_scrub_render_target - scrub a render target binding
 574  * from a context.
 575  *
 576  * @bi: single binding information.
 577  * @rebind: Whether to issue a bind instead of scrub command.
 578  */
 579 static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi,
 580                                            bool rebind)
 581 {
 582         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 583         struct {
 584                 SVGA3dCmdHeader header;
 585                 SVGA3dCmdSetRenderTarget body;
 586         } *cmd;
 587
 588         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 589         if (unlikely(cmd == NULL)) {
 590                 DRM_ERROR("Failed reserving FIFO space for render target "
 591                           "unbinding.\n");
 592                 return -ENOMEM;
 593         }
 594
 595         cmd->header.id = SVGA_3D_CMD_SETRENDERTARGET;
 596         cmd->header.size = sizeof(cmd->body);
 597         cmd->body.cid = bi->ctx->id;
 598         cmd->body.type = bi->i1.rt_type;
 599         cmd->body.target.sid = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 600         cmd->body.target.face = 0;
 601         cmd->body.target.mipmap = 0;
 602         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 603
 604         return 0;
 605 }
 606
 607 /**
 608  * vmw_context_scrub_texture - scrub a texture binding from a context.
 609  *
 610  * @bi: single binding information.
 611  * @rebind: Whether to issue a bind instead of scrub command.
 612  *
 613  * TODO: Possibly complement this function with a function that takes
 614  * a list of texture bindings and combines them to a single command.
 615  */
 616 static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi,
 617                                      bool rebind)
 618 {
 619         struct vmw_private *dev_priv = bi->ctx->dev_priv;
 620         struct {
 621                 SVGA3dCmdHeader header;
 622                 struct {
 623                         SVGA3dCmdSetTextureState c;
 624                         SVGA3dTextureState s1;
 625                 } body;
 626         } *cmd;
 627
 628         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 629         if (unlikely(cmd == NULL)) {
 630                 DRM_ERROR("Failed reserving FIFO space for texture "
 631                           "unbinding.\n");
 632                 return -ENOMEM;
 633         }
 634
 635
 636         cmd->header.id = SVGA_3D_CMD_SETTEXTURESTATE;
 637         cmd->header.size = sizeof(cmd->body);
 638         cmd->body.c.cid = bi->ctx->id;
 639         cmd->body.s1.stage = bi->i1.texture_stage;
 640         cmd->body.s1.name = SVGA3D_TS_BIND_TEXTURE;
 641         cmd->body.s1.value = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
 642         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 643
 644         return 0;
 645 }
 646
 647 /**
 648  * vmw_context_binding_drop: Stop tracking a context binding
 649  *
 650  * @cb: Pointer to binding tracker storage.
 651  *
 652  * Stops tracking a context binding, and re-initializes its storage.
 653  * Typically used when the context binding is replaced with a binding to
 654  * another (or the same, for that matter) resource.
 655  */
 656 static void vmw_context_binding_drop(struct vmw_ctx_binding *cb)
 657 {
 658         list_del(&cb->ctx_list);
 659         if (!list_empty(&cb->res_list))
 660                 list_del(&cb->res_list);
 661         cb->bi.ctx = NULL;
 662 }
 663
 664 /**
 665  * vmw_context_binding_add: Start tracking a context binding
 666  *
 667  * @cbs: Pointer to the context binding state tracker.
 668  * @bi: Information about the binding to track.
 669  *
 670  * Performs basic checks on the binding to make sure arguments are within
 671  * bounds and then starts tracking the binding in the context binding
 672  * state structure @cbs.
 673  */
 674 int vmw_context_binding_add(struct vmw_ctx_binding_state *cbs,
 675                             const struct vmw_ctx_bindinfo *bi)
 676 {
 677         struct vmw_ctx_binding *loc;
 678
 679         switch (bi->bt) {
 680         case vmw_ctx_binding_rt:
 681                 if (unlikely((unsigned)bi->i1.rt_type >= SVGA3D_RT_MAX)) {
 682                         DRM_ERROR("Illegal render target type %u.\n",
 683                                   (unsigned) bi->i1.rt_type);
 684                         return -EINVAL;
 685                 }
 686                 loc = &cbs->render_targets[bi->i1.rt_type];
 687                 break;
 688         case vmw_ctx_binding_tex:
 689                 if (unlikely((unsigned)bi->i1.texture_stage >=
 690                              SVGA3D_NUM_TEXTURE_UNITS)) {
 691                         DRM_ERROR("Illegal texture/sampler unit %u.\n",
 692                                   (unsigned) bi->i1.texture_stage);
 693                         return -EINVAL;
 694                 }
 695                 loc = &cbs->texture_units[bi->i1.texture_stage];
 696                 break;
 697         case vmw_ctx_binding_shader:
 698                 if (unlikely((unsigned)bi->i1.shader_type >=
 699                              SVGA3D_SHADERTYPE_MAX)) {
 700                         DRM_ERROR("Illegal shader type %u.\n",
 701                                   (unsigned) bi->i1.shader_type);
 702                         return -EINVAL;
 703                 }
 704                 loc = &cbs->shaders[bi->i1.shader_type];
 705                 break;
 706         default:
 707                 BUG();
 708         }
 709
 710         if (loc->bi.ctx != NULL)
 711                 vmw_context_binding_drop(loc);
 712
 713         loc->bi = *bi;
 714         loc->bi.scrubbed = false;
 715         list_add_tail(&loc->ctx_list, &cbs->list);
 716         INIT_LIST_HEAD(&loc->res_list);
 717
 718         return 0;
 719 }
 720
 721 /**
 722  * vmw_context_binding_transfer: Transfer a context binding tracking entry.
 723  *
 724  * @cbs: Pointer to the persistent context binding state tracker.
 725  * @bi: Information about the binding to track.
 726  *
 727  */
 728 static void vmw_context_binding_transfer(struct vmw_ctx_binding_state *cbs,
 729                                          const struct vmw_ctx_bindinfo *bi)
 730 {
 731         struct vmw_ctx_binding *loc;
 732
 733         switch (bi->bt) {
 734         case vmw_ctx_binding_rt:
 735                 loc = &cbs->render_targets[bi->i1.rt_type];
 736                 break;
 737         case vmw_ctx_binding_tex:
 738                 loc = &cbs->texture_units[bi->i1.texture_stage];
 739                 break;
 740         case vmw_ctx_binding_shader:
 741                 loc = &cbs->shaders[bi->i1.shader_type];
 742                 break;
 743         default:
 744                 BUG();
 745         }
 746
 747         if (loc->bi.ctx != NULL)
 748                 vmw_context_binding_drop(loc);
 749
 750         if (bi->res != NULL) {
 751                 loc->bi = *bi;
 752                 list_add_tail(&loc->ctx_list, &cbs->list);
 753                 list_add_tail(&loc->res_list, &bi->res->binding_head);
 754         }
 755 }
 756
 757 /**
 758  * vmw_context_binding_kill - Kill a binding on the device
 759  * and stop tracking it.
 760  *
 761  * @cb: Pointer to binding tracker storage.
 762  *
 763  * Emits FIFO commands to scrub a binding represented by @cb.
 764  * Then stops tracking the binding and re-initializes its storage.
 765  */
 766 static void vmw_context_binding_kill(struct vmw_ctx_binding *cb)
 767 {
 768         if (!cb->bi.scrubbed) {
 769                 (void) vmw_scrub_funcs[cb->bi.bt](&cb->bi, false);
 770                 cb->bi.scrubbed = true;
 771         }
 772         vmw_context_binding_drop(cb);
 773 }
 774
 775 /**
 776  * vmw_context_binding_state_kill - Kill all bindings associated with a
 777  * struct vmw_ctx_binding state structure, and re-initialize the structure.
 778  *
 779  * @cbs: Pointer to the context binding state tracker.
 780  *
 781  * Emits commands to scrub all bindings associated with the
 782  * context binding state tracker. Then re-initializes the whole structure.
 783  */
 784 static void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs)
 785 {
 786         struct vmw_ctx_binding *entry, *next;
 787
 788         list_for_each_entry_safe(entry, next, &cbs->list, ctx_list)
 789                 vmw_context_binding_kill(entry);
 790 }
 791
 792 /**
 793  * vmw_context_binding_state_scrub - Scrub all bindings associated with a
 794  * struct vmw_ctx_binding state structure.
 795  *
 796  * @cbs: Pointer to the context binding state tracker.
 797  *
 798  * Emits commands to scrub all bindings associated with the
 799  * context binding state tracker.
 800  */
 801 static void vmw_context_binding_state_scrub(struct vmw_ctx_binding_state *cbs)
 802 {
 803         struct vmw_ctx_binding *entry;
 804
 805         list_for_each_entry(entry, &cbs->list, ctx_list) {
 806                 if (!entry->bi.scrubbed) {
 807                         (void) vmw_scrub_funcs[entry->bi.bt](&entry->bi, false);
 808                         entry->bi.scrubbed = true;
 809                 }
 810         }
 811 }
 812
 813 /**
 814  * vmw_context_binding_res_list_kill - Kill all bindings on a
 815  * resource binding list
 816  *
 817  * @head: list head of resource binding list
 818  *
 819  * Kills all bindings associated with a specific resource. Typically
 820  * called before the resource is destroyed.
 821  */
 822 void vmw_context_binding_res_list_kill(struct list_head *head)
 823 {
 824         struct vmw_ctx_binding *entry, *next;
 825
 826         list_for_each_entry_safe(entry, next, head, res_list)
 827                 vmw_context_binding_kill(entry);
 828 }
 829
 830 /**
 831  * vmw_context_binding_res_list_scrub - Scrub all bindings on a
 832  * resource binding list
 833  *
 834  * @head: list head of resource binding list
 835  *
 836  * Scrub all bindings associated with a specific resource. Typically
 837  * called before the resource is evicted.
 838  */
 839 void vmw_context_binding_res_list_scrub(struct list_head *head)
 840 {
 841         struct vmw_ctx_binding *entry;
 842
 843         list_for_each_entry(entry, head, res_list) {
 844                 if (!entry->bi.scrubbed) {
 845                         (void) vmw_scrub_funcs[entry->bi.bt](&entry->bi, false);
 846                         entry->bi.scrubbed = true;
 847                 }
 848         }
 849 }
 850
 851 /**
 852  * vmw_context_binding_state_transfer - Commit staged binding info
 853  *
 854  * @ctx: Pointer to context to commit the staged binding info to.
 855  * @from: Staged binding info built during execbuf.
 856  *
 857  * Transfers binding info from a temporary structure to the persistent
 858  * structure in the context. This can be done once commands
 859  */
 860 void vmw_context_binding_state_transfer(struct vmw_resource *ctx,
 861                                         struct vmw_ctx_binding_state *from)
 862 {
 863         struct vmw_user_context *uctx =
 864                 container_of(ctx, struct vmw_user_context, res);
 865         struct vmw_ctx_binding *entry, *next;
 866
 867         list_for_each_entry_safe(entry, next, &from->list, ctx_list)
 868                 vmw_context_binding_transfer(&uctx->cbs, &entry->bi);
 869 }
 870
 871 /**
 872  * vmw_context_rebind_all - Rebind all scrubbed bindings of a context
 873  *
 874  * @ctx: The context resource
 875  *
 876  * Walks through the context binding list and rebinds all scrubbed
 877  * resources.
 878  */
 879 int vmw_context_rebind_all(struct vmw_resource *ctx)
 880 {
 881         struct vmw_ctx_binding *entry;
 882         struct vmw_user_context *uctx =
 883                 container_of(ctx, struct vmw_user_context, res);
 884         struct vmw_ctx_binding_state *cbs = &uctx->cbs;
 885         int ret;
 886
 887         list_for_each_entry(entry, &cbs->list, ctx_list) {
 888                 if (likely(!entry->bi.scrubbed))
 889                         continue;
 890
 891                 if (WARN_ON(entry->bi.res == NULL || entry->bi.res->id ==
 892                             SVGA3D_INVALID_ID))
 893                         continue;
 894
 895                 ret = vmw_scrub_funcs[entry->bi.bt](&entry->bi, true);
 896                 if (unlikely(ret != 0))
 897                         return ret;
 898
 899                 entry->bi.scrubbed = false;
 900         }
 901
 902         return 0;
 903 }
 904
 905 /**
 906  * vmw_context_binding_list - Return a list of context bindings
 907  *
 908  * @ctx: The context resource
 909  *
 910  * Returns the current list of bindings of the given context. Note that
 911  * this list becomes stale as soon as the dev_priv::binding_mutex is unlocked.
 912  */
 913 struct list_head *vmw_context_binding_list(struct vmw_resource *ctx)
 914 {
 915         return &(container_of(ctx, struct vmw_user_context, res)->cbs.list);
 916 }
 917
 918 struct vmw_cmdbuf_res_manager *vmw_context_res_man(struct vmw_resource *ctx)
 919 {
 920         return container_of(ctx, struct vmw_user_context, res)->man;
 921 }