drivers/gpu/drm/i915/selftests/mock_context.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include "mock_context.h"
  26 #include "mock_gtt.h"
  27
  28 struct i915_gem_context *
  29 mock_context(struct drm_i915_private *i915,
  30              const char *name)
  31 {
  32         struct i915_gem_context *ctx;
  33         int ret;
  34
  35         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
  36         if (!ctx)
  37                 return NULL;
  38
  39         kref_init(&ctx->ref);
  40         INIT_LIST_HEAD(&ctx->link);
  41         ctx->i915 = i915;
  42
  43         INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
  44         INIT_LIST_HEAD(&ctx->handles_list);
  45
  46         ret = ida_simple_get(&i915->contexts.hw_ida,
  47                              0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
  48         if (ret < 0)
  49                 goto err_handles;
  50         ctx->hw_id = ret;
  51
  52         if (name) {
  53                 ctx->name = kstrdup(name, GFP_KERNEL);
  54                 if (!ctx->name)
  55                         goto err_put;
  56
  57                 ctx->ppgtt = mock_ppgtt(i915, name);
  58                 if (!ctx->ppgtt)
  59                         goto err_put;
  60         }
  61
  62         return ctx;
  63
  64 err_handles:
  65         kfree(ctx);
  66         return NULL;
  67
  68 err_put:
  69         i915_gem_context_set_closed(ctx);
  70         i915_gem_context_put(ctx);
  71         return NULL;
  72 }
  73
  74 void mock_context_close(struct i915_gem_context *ctx)
  75 {
  76         context_close(ctx);
  77 }
  78
  79 void mock_init_contexts(struct drm_i915_private *i915)
  80 {
  81         INIT_LIST_HEAD(&i915->contexts.list);
  82         ida_init(&i915->contexts.hw_ida);
  83
  84         INIT_WORK(&i915->contexts.free_work, contexts_free_worker);
  85         init_llist_head(&i915->contexts.free_list);
  86 }
  87
  88 struct i915_gem_context *
  89 live_context(struct drm_i915_private *i915, struct drm_file *file)
  90 {
  91         lockdep_assert_held(&i915->drm.struct_mutex);
  92
  93         return i915_gem_create_context(i915, file->driver_priv);
  94 }