drivers/gpu/drm/vmwgfx/vmwgfx_shader.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
   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 <drm/ttm/ttm_placement.h>
  29
  30 #include "vmwgfx_drv.h"
  31 #include "vmwgfx_resource_priv.h"
  32 #include "vmwgfx_binding.h"
  33
  34 struct vmw_shader {
  35         struct vmw_resource res;
  36         SVGA3dShaderType type;
  37         uint32_t size;
  38         uint8_t num_input_sig;
  39         uint8_t num_output_sig;
  40 };
  41
  42 struct vmw_user_shader {
  43         struct ttm_base_object base;
  44         struct vmw_shader shader;
  45 };
  46
  47 struct vmw_dx_shader {
  48         struct vmw_resource res;
  49         struct vmw_resource *ctx;
  50         struct vmw_resource *cotable;
  51         u32 id;
  52         bool committed;
  53         struct list_head cotable_head;
  54 };
  55
  56 static uint64_t vmw_user_shader_size;
  57 static uint64_t vmw_shader_size;
  58 static size_t vmw_shader_dx_size;
  59
  60 static void vmw_user_shader_free(struct vmw_resource *res);
  61 static struct vmw_resource *
  62 vmw_user_shader_base_to_res(struct ttm_base_object *base);
  63
  64 static int vmw_gb_shader_create(struct vmw_resource *res);
  65 static int vmw_gb_shader_bind(struct vmw_resource *res,
  66                                struct ttm_validate_buffer *val_buf);
  67 static int vmw_gb_shader_unbind(struct vmw_resource *res,
  68                                  bool readback,
  69                                  struct ttm_validate_buffer *val_buf);
  70 static int vmw_gb_shader_destroy(struct vmw_resource *res);
  71
  72 static int vmw_dx_shader_create(struct vmw_resource *res);
  73 static int vmw_dx_shader_bind(struct vmw_resource *res,
  74                                struct ttm_validate_buffer *val_buf);
  75 static int vmw_dx_shader_unbind(struct vmw_resource *res,
  76                                  bool readback,
  77                                  struct ttm_validate_buffer *val_buf);
  78 static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
  79                                         enum vmw_cmdbuf_res_state state);
  80 static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type);
  81 static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type);
  82 static uint64_t vmw_user_shader_size;
  83
  84 static const struct vmw_user_resource_conv user_shader_conv = {
  85         .object_type = VMW_RES_SHADER,
  86         .base_obj_to_res = vmw_user_shader_base_to_res,
  87         .res_free = vmw_user_shader_free
  88 };
  89
  90 const struct vmw_user_resource_conv *user_shader_converter =
  91         &user_shader_conv;
  92
  93
  94 static const struct vmw_res_func vmw_gb_shader_func = {
  95         .res_type = vmw_res_shader,
  96         .needs_backup = true,
  97         .may_evict = true,
  98         .type_name = "guest backed shaders",
  99         .backup_placement = &vmw_mob_placement,
 100         .create = vmw_gb_shader_create,
 101         .destroy = vmw_gb_shader_destroy,
 102         .bind = vmw_gb_shader_bind,
 103         .unbind = vmw_gb_shader_unbind
 104 };
 105
 106 static const struct vmw_res_func vmw_dx_shader_func = {
 107         .res_type = vmw_res_shader,
 108         .needs_backup = true,
 109         .may_evict = false,
 110         .type_name = "dx shaders",
 111         .backup_placement = &vmw_mob_placement,
 112         .create = vmw_dx_shader_create,
 113         /*
 114          * The destroy callback is only called with a committed resource on
 115          * context destroy, in which case we destroy the cotable anyway,
 116          * so there's no need to destroy DX shaders separately.
 117          */
 118         .destroy = NULL,
 119         .bind = vmw_dx_shader_bind,
 120         .unbind = vmw_dx_shader_unbind,
 121         .commit_notify = vmw_dx_shader_commit_notify,
 122 };
 123
 124 /**
 125  * Shader management:
 126  */
 127
 128 static inline struct vmw_shader *
 129 vmw_res_to_shader(struct vmw_resource *res)
 130 {
 131         return container_of(res, struct vmw_shader, res);
 132 }
 133
 134 /**
 135  * vmw_res_to_dx_shader - typecast a struct vmw_resource to a
 136  * struct vmw_dx_shader
 137  *
 138  * @res: Pointer to the struct vmw_resource.
 139  */
 140 static inline struct vmw_dx_shader *
 141 vmw_res_to_dx_shader(struct vmw_resource *res)
 142 {
 143         return container_of(res, struct vmw_dx_shader, res);
 144 }
 145
 146 static void vmw_hw_shader_destroy(struct vmw_resource *res)
 147 {
 148         if (likely(res->func->destroy))
 149                 (void) res->func->destroy(res);
 150         else
 151                 res->id = -1;
 152 }
 153
 154
 155 static int vmw_gb_shader_init(struct vmw_private *dev_priv,
 156                               struct vmw_resource *res,
 157                               uint32_t size,
 158                               uint64_t offset,
 159                               SVGA3dShaderType type,
 160                               uint8_t num_input_sig,
 161                               uint8_t num_output_sig,
 162                               struct vmw_buffer_object *byte_code,
 163                               void (*res_free) (struct vmw_resource *res))
 164 {
 165         struct vmw_shader *shader = vmw_res_to_shader(res);
 166         int ret;
 167
 168         ret = vmw_resource_init(dev_priv, res, true, res_free,
 169                                 &vmw_gb_shader_func);
 170
 171         if (unlikely(ret != 0)) {
 172                 if (res_free)
 173                         res_free(res);
 174                 else
 175                         kfree(res);
 176                 return ret;
 177         }
 178
 179         res->backup_size = size;
 180         if (byte_code) {
 181                 res->backup = vmw_bo_reference(byte_code);
 182                 res->backup_offset = offset;
 183         }
 184         shader->size = size;
 185         shader->type = type;
 186         shader->num_input_sig = num_input_sig;
 187         shader->num_output_sig = num_output_sig;
 188
 189         vmw_resource_activate(res, vmw_hw_shader_destroy);
 190         return 0;
 191 }
 192
 193 /*
 194  * GB shader code:
 195  */
 196
 197 static int vmw_gb_shader_create(struct vmw_resource *res)
 198 {
 199         struct vmw_private *dev_priv = res->dev_priv;
 200         struct vmw_shader *shader = vmw_res_to_shader(res);
 201         int ret;
 202         struct {
 203                 SVGA3dCmdHeader header;
 204                 SVGA3dCmdDefineGBShader body;
 205         } *cmd;
 206
 207         if (likely(res->id != -1))
 208                 return 0;
 209
 210         ret = vmw_resource_alloc_id(res);
 211         if (unlikely(ret != 0)) {
 212                 DRM_ERROR("Failed to allocate a shader id.\n");
 213                 goto out_no_id;
 214         }
 215
 216         if (unlikely(res->id >= VMWGFX_NUM_GB_SHADER)) {
 217                 ret = -EBUSY;
 218                 goto out_no_fifo;
 219         }
 220
 221         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 222         if (unlikely(cmd == NULL)) {
 223                 DRM_ERROR("Failed reserving FIFO space for shader "
 224                           "creation.\n");
 225                 ret = -ENOMEM;
 226                 goto out_no_fifo;
 227         }
 228
 229         cmd->header.id = SVGA_3D_CMD_DEFINE_GB_SHADER;
 230         cmd->header.size = sizeof(cmd->body);
 231         cmd->body.shid = res->id;
 232         cmd->body.type = shader->type;
 233         cmd->body.sizeInBytes = shader->size;
 234         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 235         vmw_fifo_resource_inc(dev_priv);
 236
 237         return 0;
 238
 239 out_no_fifo:
 240         vmw_resource_release_id(res);
 241 out_no_id:
 242         return ret;
 243 }
 244
 245 static int vmw_gb_shader_bind(struct vmw_resource *res,
 246                               struct ttm_validate_buffer *val_buf)
 247 {
 248         struct vmw_private *dev_priv = res->dev_priv;
 249         struct {
 250                 SVGA3dCmdHeader header;
 251                 SVGA3dCmdBindGBShader body;
 252         } *cmd;
 253         struct ttm_buffer_object *bo = val_buf->bo;
 254
 255         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 256
 257         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 258         if (unlikely(cmd == NULL)) {
 259                 DRM_ERROR("Failed reserving FIFO space for shader "
 260                           "binding.\n");
 261                 return -ENOMEM;
 262         }
 263
 264         cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
 265         cmd->header.size = sizeof(cmd->body);
 266         cmd->body.shid = res->id;
 267         cmd->body.mobid = bo->mem.start;
 268         cmd->body.offsetInBytes = res->backup_offset;
 269         res->backup_dirty = false;
 270         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 271
 272         return 0;
 273 }
 274
 275 static int vmw_gb_shader_unbind(struct vmw_resource *res,
 276                                 bool readback,
 277                                 struct ttm_validate_buffer *val_buf)
 278 {
 279         struct vmw_private *dev_priv = res->dev_priv;
 280         struct {
 281                 SVGA3dCmdHeader header;
 282                 SVGA3dCmdBindGBShader body;
 283         } *cmd;
 284         struct vmw_fence_obj *fence;
 285
 286         BUG_ON(res->backup->base.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 shader "
 291                           "unbinding.\n");
 292                 return -ENOMEM;
 293         }
 294
 295         cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
 296         cmd->header.size = sizeof(cmd->body);
 297         cmd->body.shid = res->id;
 298         cmd->body.mobid = SVGA3D_INVALID_ID;
 299         cmd->body.offsetInBytes = 0;
 300         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 301
 302         /*
 303          * Create a fence object and fence the backup buffer.
 304          */
 305
 306         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 307                                           &fence, NULL);
 308
 309         vmw_bo_fence_single(val_buf->bo, fence);
 310
 311         if (likely(fence != NULL))
 312                 vmw_fence_obj_unreference(&fence);
 313
 314         return 0;
 315 }
 316
 317 static int vmw_gb_shader_destroy(struct vmw_resource *res)
 318 {
 319         struct vmw_private *dev_priv = res->dev_priv;
 320         struct {
 321                 SVGA3dCmdHeader header;
 322                 SVGA3dCmdDestroyGBShader body;
 323         } *cmd;
 324
 325         if (likely(res->id == -1))
 326                 return 0;
 327
 328         mutex_lock(&dev_priv->binding_mutex);
 329         vmw_binding_res_list_scrub(&res->binding_head);
 330
 331         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 332         if (unlikely(cmd == NULL)) {
 333                 DRM_ERROR("Failed reserving FIFO space for shader "
 334                           "destruction.\n");
 335                 mutex_unlock(&dev_priv->binding_mutex);
 336                 return -ENOMEM;
 337         }
 338
 339         cmd->header.id = SVGA_3D_CMD_DESTROY_GB_SHADER;
 340         cmd->header.size = sizeof(cmd->body);
 341         cmd->body.shid = res->id;
 342         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 343         mutex_unlock(&dev_priv->binding_mutex);
 344         vmw_resource_release_id(res);
 345         vmw_fifo_resource_dec(dev_priv);
 346
 347         return 0;
 348 }
 349
 350 /*
 351  * DX shader code:
 352  */
 353
 354 /**
 355  * vmw_dx_shader_commit_notify - Notify that a shader operation has been
 356  * committed to hardware from a user-supplied command stream.
 357  *
 358  * @res: Pointer to the shader resource.
 359  * @state: Indicating whether a creation or removal has been committed.
 360  *
 361  */
 362 static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
 363                                         enum vmw_cmdbuf_res_state state)
 364 {
 365         struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
 366         struct vmw_private *dev_priv = res->dev_priv;
 367
 368         if (state == VMW_CMDBUF_RES_ADD) {
 369                 mutex_lock(&dev_priv->binding_mutex);
 370                 vmw_cotable_add_resource(shader->cotable,
 371                                          &shader->cotable_head);
 372                 shader->committed = true;
 373                 res->id = shader->id;
 374                 mutex_unlock(&dev_priv->binding_mutex);
 375         } else {
 376                 mutex_lock(&dev_priv->binding_mutex);
 377                 list_del_init(&shader->cotable_head);
 378                 shader->committed = false;
 379                 res->id = -1;
 380                 mutex_unlock(&dev_priv->binding_mutex);
 381         }
 382 }
 383
 384 /**
 385  * vmw_dx_shader_unscrub - Have the device reattach a MOB to a DX shader.
 386  *
 387  * @res: The shader resource
 388  *
 389  * This function reverts a scrub operation.
 390  */
 391 static int vmw_dx_shader_unscrub(struct vmw_resource *res)
 392 {
 393         struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
 394         struct vmw_private *dev_priv = res->dev_priv;
 395         struct {
 396                 SVGA3dCmdHeader header;
 397                 SVGA3dCmdDXBindShader body;
 398         } *cmd;
 399
 400         if (!list_empty(&shader->cotable_head) || !shader->committed)
 401                 return 0;
 402
 403         cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd),
 404                                   shader->ctx->id);
 405         if (unlikely(cmd == NULL)) {
 406                 DRM_ERROR("Failed reserving FIFO space for shader "
 407                           "scrubbing.\n");
 408                 return -ENOMEM;
 409         }
 410
 411         cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
 412         cmd->header.size = sizeof(cmd->body);
 413         cmd->body.cid = shader->ctx->id;
 414         cmd->body.shid = shader->id;
 415         cmd->body.mobid = res->backup->base.mem.start;
 416         cmd->body.offsetInBytes = res->backup_offset;
 417         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 418
 419         vmw_cotable_add_resource(shader->cotable, &shader->cotable_head);
 420
 421         return 0;
 422 }
 423
 424 /**
 425  * vmw_dx_shader_create - The DX shader create callback
 426  *
 427  * @res: The DX shader resource
 428  *
 429  * The create callback is called as part of resource validation and
 430  * makes sure that we unscrub the shader if it's previously been scrubbed.
 431  */
 432 static int vmw_dx_shader_create(struct vmw_resource *res)
 433 {
 434         struct vmw_private *dev_priv = res->dev_priv;
 435         struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
 436         int ret = 0;
 437
 438         WARN_ON_ONCE(!shader->committed);
 439
 440         if (!list_empty(&res->mob_head)) {
 441                 mutex_lock(&dev_priv->binding_mutex);
 442                 ret = vmw_dx_shader_unscrub(res);
 443                 mutex_unlock(&dev_priv->binding_mutex);
 444         }
 445
 446         res->id = shader->id;
 447         return ret;
 448 }
 449
 450 /**
 451  * vmw_dx_shader_bind - The DX shader bind callback
 452  *
 453  * @res: The DX shader resource
 454  * @val_buf: Pointer to the validate buffer.
 455  *
 456  */
 457 static int vmw_dx_shader_bind(struct vmw_resource *res,
 458                               struct ttm_validate_buffer *val_buf)
 459 {
 460         struct vmw_private *dev_priv = res->dev_priv;
 461         struct ttm_buffer_object *bo = val_buf->bo;
 462
 463         BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
 464         mutex_lock(&dev_priv->binding_mutex);
 465         vmw_dx_shader_unscrub(res);
 466         mutex_unlock(&dev_priv->binding_mutex);
 467
 468         return 0;
 469 }
 470
 471 /**
 472  * vmw_dx_shader_scrub - Have the device unbind a MOB from a DX shader.
 473  *
 474  * @res: The shader resource
 475  *
 476  * This function unbinds a MOB from the DX shader without requiring the
 477  * MOB dma_buffer to be reserved. The driver still considers the MOB bound.
 478  * However, once the driver eventually decides to unbind the MOB, it doesn't
 479  * need to access the context.
 480  */
 481 static int vmw_dx_shader_scrub(struct vmw_resource *res)
 482 {
 483         struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
 484         struct vmw_private *dev_priv = res->dev_priv;
 485         struct {
 486                 SVGA3dCmdHeader header;
 487                 SVGA3dCmdDXBindShader body;
 488         } *cmd;
 489
 490         if (list_empty(&shader->cotable_head))
 491                 return 0;
 492
 493         WARN_ON_ONCE(!shader->committed);
 494         cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
 495         if (unlikely(cmd == NULL)) {
 496                 DRM_ERROR("Failed reserving FIFO space for shader "
 497                           "scrubbing.\n");
 498                 return -ENOMEM;
 499         }
 500
 501         cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
 502         cmd->header.size = sizeof(cmd->body);
 503         cmd->body.cid = shader->ctx->id;
 504         cmd->body.shid = res->id;
 505         cmd->body.mobid = SVGA3D_INVALID_ID;
 506         cmd->body.offsetInBytes = 0;
 507         vmw_fifo_commit(dev_priv, sizeof(*cmd));
 508         res->id = -1;
 509         list_del_init(&shader->cotable_head);
 510
 511         return 0;
 512 }
 513
 514 /**
 515  * vmw_dx_shader_unbind - The dx shader unbind callback.
 516  *
 517  * @res: The shader resource
 518  * @readback: Whether this is a readback unbind. Currently unused.
 519  * @val_buf: MOB buffer information.
 520  */
 521 static int vmw_dx_shader_unbind(struct vmw_resource *res,
 522                                 bool readback,
 523                                 struct ttm_validate_buffer *val_buf)
 524 {
 525         struct vmw_private *dev_priv = res->dev_priv;
 526         struct vmw_fence_obj *fence;
 527         int ret;
 528
 529         BUG_ON(res->backup->base.mem.mem_type != VMW_PL_MOB);
 530
 531         mutex_lock(&dev_priv->binding_mutex);
 532         ret = vmw_dx_shader_scrub(res);
 533         mutex_unlock(&dev_priv->binding_mutex);
 534
 535         if (ret)
 536                 return ret;
 537
 538         (void) vmw_execbuf_fence_commands(NULL, dev_priv,
 539                                           &fence, NULL);
 540         vmw_bo_fence_single(val_buf->bo, fence);
 541
 542         if (likely(fence != NULL))
 543                 vmw_fence_obj_unreference(&fence);
 544
 545         return 0;
 546 }
 547
 548 /**
 549  * vmw_dx_shader_cotable_list_scrub - The cotable unbind_func callback for
 550  * DX shaders.
 551  *
 552  * @dev_priv: Pointer to device private structure.
 553  * @list: The list of cotable resources.
 554  * @readback: Whether the call was part of a readback unbind.
 555  *
 556  * Scrubs all shader MOBs so that any subsequent shader unbind or shader
 557  * destroy operation won't need to swap in the context.
 558  */
 559 void vmw_dx_shader_cotable_list_scrub(struct vmw_private *dev_priv,
 560                                       struct list_head *list,
 561                                       bool readback)
 562 {
 563         struct vmw_dx_shader *entry, *next;
 564
 565         WARN_ON_ONCE(!mutex_is_locked(&dev_priv->binding_mutex));
 566
 567         list_for_each_entry_safe(entry, next, list, cotable_head) {
 568                 WARN_ON(vmw_dx_shader_scrub(&entry->res));
 569                 if (!readback)
 570                         entry->committed = false;
 571         }
 572 }
 573
 574 /**
 575  * vmw_dx_shader_res_free - The DX shader free callback
 576  *
 577  * @res: The shader resource
 578  *
 579  * Frees the DX shader resource and updates memory accounting.
 580  */
 581 static void vmw_dx_shader_res_free(struct vmw_resource *res)
 582 {
 583         struct vmw_private *dev_priv = res->dev_priv;
 584         struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
 585
 586         vmw_resource_unreference(&shader->cotable);
 587         kfree(shader);
 588         ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
 589 }
 590
 591 /**
 592  * vmw_dx_shader_add - Add a shader resource as a command buffer managed
 593  * resource.
 594  *
 595  * @man: The command buffer resource manager.
 596  * @ctx: Pointer to the context resource.
 597  * @user_key: The id used for this shader.
 598  * @shader_type: The shader type.
 599  * @list: The list of staged command buffer managed resources.
 600  */
 601 int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
 602                       struct vmw_resource *ctx,
 603                       u32 user_key,
 604                       SVGA3dShaderType shader_type,
 605                       struct list_head *list)
 606 {
 607         struct vmw_dx_shader *shader;
 608         struct vmw_resource *res;
 609         struct vmw_private *dev_priv = ctx->dev_priv;
 610         struct ttm_operation_ctx ttm_opt_ctx = {
 611                 .interruptible = true,
 612                 .no_wait_gpu = false
 613         };
 614         int ret;
 615
 616         if (!vmw_shader_dx_size)
 617                 vmw_shader_dx_size = ttm_round_pot(sizeof(*shader));
 618
 619         if (!vmw_shader_id_ok(user_key, shader_type))
 620                 return -EINVAL;
 621
 622         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), vmw_shader_dx_size,
 623                                    &ttm_opt_ctx);
 624         if (ret) {
 625                 if (ret != -ERESTARTSYS)
 626                         DRM_ERROR("Out of graphics memory for shader "
 627                                   "creation.\n");
 628                 return ret;
 629         }
 630
 631         shader = kmalloc(sizeof(*shader), GFP_KERNEL);
 632         if (!shader) {
 633                 ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
 634                 return -ENOMEM;
 635         }
 636
 637         res = &shader->res;
 638         shader->ctx = ctx;
 639         shader->cotable = vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER);
 640         shader->id = user_key;
 641         shader->committed = false;
 642         INIT_LIST_HEAD(&shader->cotable_head);
 643         ret = vmw_resource_init(dev_priv, res, true,
 644                                 vmw_dx_shader_res_free, &vmw_dx_shader_func);
 645         if (ret)
 646                 goto out_resource_init;
 647
 648         /*
 649          * The user_key name-space is not per shader type for DX shaders,
 650          * so when hashing, use a single zero shader type.
 651          */
 652         ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
 653                                  vmw_shader_key(user_key, 0),
 654                                  res, list);
 655         if (ret)
 656                 goto out_resource_init;
 657
 658         res->id = shader->id;
 659         vmw_resource_activate(res, vmw_hw_shader_destroy);
 660
 661 out_resource_init:
 662         vmw_resource_unreference(&res);
 663
 664         return ret;
 665 }
 666
 667
 668
 669 /**
 670  * User-space shader management:
 671  */
 672
 673 static struct vmw_resource *
 674 vmw_user_shader_base_to_res(struct ttm_base_object *base)
 675 {
 676         return &(container_of(base, struct vmw_user_shader, base)->
 677                  shader.res);
 678 }
 679
 680 static void vmw_user_shader_free(struct vmw_resource *res)
 681 {
 682         struct vmw_user_shader *ushader =
 683                 container_of(res, struct vmw_user_shader, shader.res);
 684         struct vmw_private *dev_priv = res->dev_priv;
 685
 686         ttm_base_object_kfree(ushader, base);
 687         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 688                             vmw_user_shader_size);
 689 }
 690
 691 static void vmw_shader_free(struct vmw_resource *res)
 692 {
 693         struct vmw_shader *shader = vmw_res_to_shader(res);
 694         struct vmw_private *dev_priv = res->dev_priv;
 695
 696         kfree(shader);
 697         ttm_mem_global_free(vmw_mem_glob(dev_priv),
 698                             vmw_shader_size);
 699 }
 700
 701 /**
 702  * This function is called when user space has no more references on the
 703  * base object. It releases the base-object's reference on the resource object.
 704  */
 705
 706 static void vmw_user_shader_base_release(struct ttm_base_object **p_base)
 707 {
 708         struct ttm_base_object *base = *p_base;
 709         struct vmw_resource *res = vmw_user_shader_base_to_res(base);
 710
 711         *p_base = NULL;
 712         vmw_resource_unreference(&res);
 713 }
 714
 715 int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
 716                               struct drm_file *file_priv)
 717 {
 718         struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
 719         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 720
 721         return ttm_ref_object_base_unref(tfile, arg->handle,
 722                                          TTM_REF_USAGE);
 723 }
 724
 725 static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
 726                                  struct vmw_buffer_object *buffer,
 727                                  size_t shader_size,
 728                                  size_t offset,
 729                                  SVGA3dShaderType shader_type,
 730                                  uint8_t num_input_sig,
 731                                  uint8_t num_output_sig,
 732                                  struct ttm_object_file *tfile,
 733                                  u32 *handle)
 734 {
 735         struct vmw_user_shader *ushader;
 736         struct vmw_resource *res, *tmp;
 737         struct ttm_operation_ctx ctx = {
 738                 .interruptible = true,
 739                 .no_wait_gpu = false
 740         };
 741         int ret;
 742
 743         /*
 744          * Approximate idr memory usage with 128 bytes. It will be limited
 745          * by maximum number_of shaders anyway.
 746          */
 747         if (unlikely(vmw_user_shader_size == 0))
 748                 vmw_user_shader_size =
 749                         ttm_round_pot(sizeof(struct vmw_user_shader)) + 128;
 750
 751         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 752                                    vmw_user_shader_size,
 753                                    &ctx);
 754         if (unlikely(ret != 0)) {
 755                 if (ret != -ERESTARTSYS)
 756                         DRM_ERROR("Out of graphics memory for shader "
 757                                   "creation.\n");
 758                 goto out;
 759         }
 760
 761         ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);
 762         if (unlikely(!ushader)) {
 763                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 764                                     vmw_user_shader_size);
 765                 ret = -ENOMEM;
 766                 goto out;
 767         }
 768
 769         res = &ushader->shader.res;
 770         ushader->base.shareable = false;
 771         ushader->base.tfile = NULL;
 772
 773         /*
 774          * From here on, the destructor takes over resource freeing.
 775          */
 776
 777         ret = vmw_gb_shader_init(dev_priv, res, shader_size,
 778                                  offset, shader_type, num_input_sig,
 779                                  num_output_sig, buffer,
 780                                  vmw_user_shader_free);
 781         if (unlikely(ret != 0))
 782                 goto out;
 783
 784         tmp = vmw_resource_reference(res);
 785         ret = ttm_base_object_init(tfile, &ushader->base, false,
 786                                    VMW_RES_SHADER,
 787                                    &vmw_user_shader_base_release, NULL);
 788
 789         if (unlikely(ret != 0)) {
 790                 vmw_resource_unreference(&tmp);
 791                 goto out_err;
 792         }
 793
 794         if (handle)
 795                 *handle = ushader->base.hash.key;
 796 out_err:
 797         vmw_resource_unreference(&res);
 798 out:
 799         return ret;
 800 }
 801
 802
 803 static struct vmw_resource *vmw_shader_alloc(struct vmw_private *dev_priv,
 804                                              struct vmw_buffer_object *buffer,
 805                                              size_t shader_size,
 806                                              size_t offset,
 807                                              SVGA3dShaderType shader_type)
 808 {
 809         struct vmw_shader *shader;
 810         struct vmw_resource *res;
 811         struct ttm_operation_ctx ctx = {
 812                 .interruptible = true,
 813                 .no_wait_gpu = false
 814         };
 815         int ret;
 816
 817         /*
 818          * Approximate idr memory usage with 128 bytes. It will be limited
 819          * by maximum number_of shaders anyway.
 820          */
 821         if (unlikely(vmw_shader_size == 0))
 822                 vmw_shader_size =
 823                         ttm_round_pot(sizeof(struct vmw_shader)) + 128;
 824
 825         ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 826                                    vmw_shader_size,
 827                                    &ctx);
 828         if (unlikely(ret != 0)) {
 829                 if (ret != -ERESTARTSYS)
 830                         DRM_ERROR("Out of graphics memory for shader "
 831                                   "creation.\n");
 832                 goto out_err;
 833         }
 834
 835         shader = kzalloc(sizeof(*shader), GFP_KERNEL);
 836         if (unlikely(!shader)) {
 837                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 838                                     vmw_shader_size);
 839                 ret = -ENOMEM;
 840                 goto out_err;
 841         }
 842
 843         res = &shader->res;
 844
 845         /*
 846          * From here on, the destructor takes over resource freeing.
 847          */
 848         ret = vmw_gb_shader_init(dev_priv, res, shader_size,
 849                                  offset, shader_type, 0, 0, buffer,
 850                                  vmw_shader_free);
 851
 852 out_err:
 853         return ret ? ERR_PTR(ret) : res;
 854 }
 855
 856
 857 static int vmw_shader_define(struct drm_device *dev, struct drm_file *file_priv,
 858                              enum drm_vmw_shader_type shader_type_drm,
 859                              u32 buffer_handle, size_t size, size_t offset,
 860                              uint8_t num_input_sig, uint8_t num_output_sig,
 861                              uint32_t *shader_handle)
 862 {
 863         struct vmw_private *dev_priv = vmw_priv(dev);
 864         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 865         struct vmw_buffer_object *buffer = NULL;
 866         SVGA3dShaderType shader_type;
 867         int ret;
 868
 869         if (buffer_handle != SVGA3D_INVALID_ID) {
 870                 ret = vmw_user_bo_lookup(tfile, buffer_handle,
 871                                              &buffer, NULL);
 872                 if (unlikely(ret != 0)) {
 873                         DRM_ERROR("Could not find buffer for shader "
 874                                   "creation.\n");
 875                         return ret;
 876                 }
 877
 878                 if ((u64)buffer->base.num_pages * PAGE_SIZE <
 879                     (u64)size + (u64)offset) {
 880                         DRM_ERROR("Illegal buffer- or shader size.\n");
 881                         ret = -EINVAL;
 882                         goto out_bad_arg;
 883                 }
 884         }
 885
 886         switch (shader_type_drm) {
 887         case drm_vmw_shader_type_vs:
 888                 shader_type = SVGA3D_SHADERTYPE_VS;
 889                 break;
 890         case drm_vmw_shader_type_ps:
 891                 shader_type = SVGA3D_SHADERTYPE_PS;
 892                 break;
 893         default:
 894                 DRM_ERROR("Illegal shader type.\n");
 895                 ret = -EINVAL;
 896                 goto out_bad_arg;
 897         }
 898
 899         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 900         if (unlikely(ret != 0))
 901                 goto out_bad_arg;
 902
 903         ret = vmw_user_shader_alloc(dev_priv, buffer, size, offset,
 904                                     shader_type, num_input_sig,
 905                                     num_output_sig, tfile, shader_handle);
 906
 907         ttm_read_unlock(&dev_priv->reservation_sem);
 908 out_bad_arg:
 909         vmw_bo_unreference(&buffer);
 910         return ret;
 911 }
 912
 913 /**
 914  * vmw_shader_id_ok - Check whether a compat shader user key and
 915  * shader type are within valid bounds.
 916  *
 917  * @user_key: User space id of the shader.
 918  * @shader_type: Shader type.
 919  *
 920  * Returns true if valid false if not.
 921  */
 922 static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type)
 923 {
 924         return user_key <= ((1 << 20) - 1) && (unsigned) shader_type < 16;
 925 }
 926
 927 /**
 928  * vmw_shader_key - Compute a hash key suitable for a compat shader.
 929  *
 930  * @user_key: User space id of the shader.
 931  * @shader_type: Shader type.
 932  *
 933  * Returns a hash key suitable for a command buffer managed resource
 934  * manager hash table.
 935  */
 936 static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type)
 937 {
 938         return user_key | (shader_type << 20);
 939 }
 940
 941 /**
 942  * vmw_shader_remove - Stage a compat shader for removal.
 943  *
 944  * @man: Pointer to the compat shader manager identifying the shader namespace.
 945  * @user_key: The key that is used to identify the shader. The key is
 946  * unique to the shader type.
 947  * @shader_type: Shader type.
 948  * @list: Caller's list of staged command buffer resource actions.
 949  */
 950 int vmw_shader_remove(struct vmw_cmdbuf_res_manager *man,
 951                       u32 user_key, SVGA3dShaderType shader_type,
 952                       struct list_head *list)
 953 {
 954         struct vmw_resource *dummy;
 955
 956         if (!vmw_shader_id_ok(user_key, shader_type))
 957                 return -EINVAL;
 958
 959         return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_shader,
 960                                      vmw_shader_key(user_key, shader_type),
 961                                      list, &dummy);
 962 }
 963
 964 /**
 965  * vmw_compat_shader_add - Create a compat shader and stage it for addition
 966  * as a command buffer managed resource.
 967  *
 968  * @man: Pointer to the compat shader manager identifying the shader namespace.
 969  * @user_key: The key that is used to identify the shader. The key is
 970  * unique to the shader type.
 971  * @bytecode: Pointer to the bytecode of the shader.
 972  * @shader_type: Shader type.
 973  * @tfile: Pointer to a struct ttm_object_file that the guest-backed shader is
 974  * to be created with.
 975  * @list: Caller's list of staged command buffer resource actions.
 976  *
 977  */
 978 int vmw_compat_shader_add(struct vmw_private *dev_priv,
 979                           struct vmw_cmdbuf_res_manager *man,
 980                           u32 user_key, const void *bytecode,
 981                           SVGA3dShaderType shader_type,
 982                           size_t size,
 983                           struct list_head *list)
 984 {
 985         struct ttm_operation_ctx ctx = { false, true };
 986         struct vmw_buffer_object *buf;
 987         struct ttm_bo_kmap_obj map;
 988         bool is_iomem;
 989         int ret;
 990         struct vmw_resource *res;
 991
 992         if (!vmw_shader_id_ok(user_key, shader_type))
 993                 return -EINVAL;
 994
 995         /* Allocate and pin a DMA buffer */
 996         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 997         if (unlikely(!buf))
 998                 return -ENOMEM;
 999
1000         ret = vmw_bo_init(dev_priv, buf, size, &vmw_sys_ne_placement,
1001                               true, vmw_bo_bo_free);
1002         if (unlikely(ret != 0))
1003                 goto out;
1004
1005         ret = ttm_bo_reserve(&buf->base, false, true, NULL);
1006         if (unlikely(ret != 0))
1007                 goto no_reserve;
1008
1009         /* Map and copy shader bytecode. */
1010         ret = ttm_bo_kmap(&buf->base, 0, PAGE_ALIGN(size) >> PAGE_SHIFT,
1011                           &map);
1012         if (unlikely(ret != 0)) {
1013                 ttm_bo_unreserve(&buf->base);
1014                 goto no_reserve;
1015         }
1016
1017         memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);
1018         WARN_ON(is_iomem);
1019
1020         ttm_bo_kunmap(&map);
1021         ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, &ctx);
1022         WARN_ON(ret != 0);
1023         ttm_bo_unreserve(&buf->base);
1024
1025         res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type);
1026         if (unlikely(ret != 0))
1027                 goto no_reserve;
1028
1029         ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
1030                                  vmw_shader_key(user_key, shader_type),
1031                                  res, list);
1032         vmw_resource_unreference(&res);
1033 no_reserve:
1034         vmw_bo_unreference(&buf);
1035 out:
1036         return ret;
1037 }
1038
1039 /**
1040  * vmw_shader_lookup - Look up a compat shader
1041  *
1042  * @man: Pointer to the command buffer managed resource manager identifying
1043  * the shader namespace.
1044  * @user_key: The user space id of the shader.
1045  * @shader_type: The shader type.
1046  *
1047  * Returns a refcounted pointer to a struct vmw_resource if the shader was
1048  * found. An error pointer otherwise.
1049  */
1050 struct vmw_resource *
1051 vmw_shader_lookup(struct vmw_cmdbuf_res_manager *man,
1052                   u32 user_key,
1053                   SVGA3dShaderType shader_type)
1054 {
1055         if (!vmw_shader_id_ok(user_key, shader_type))
1056                 return ERR_PTR(-EINVAL);
1057
1058         return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_shader,
1059                                      vmw_shader_key(user_key, shader_type));
1060 }
1061
1062 int vmw_shader_define_ioctl(struct drm_device *dev, void *data,
1063                              struct drm_file *file_priv)
1064 {
1065         struct drm_vmw_shader_create_arg *arg =
1066                 (struct drm_vmw_shader_create_arg *)data;
1067
1068         return vmw_shader_define(dev, file_priv, arg->shader_type,
1069                                  arg->buffer_handle,
1070                                  arg->size, arg->offset,
1071                                  0, 0,
1072                                  &arg->shader_handle);
1073 }