LXR linux/drivers/gpu/drm/i915/selftests/mock

   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
  28struct i915_gem_context *
  29mock_context(struct drm_i915_private *i915,
  30             const char *name)
  31{
  32        struct i915_gem_context *ctx;
  33        unsigned int n;
  34        int ret;
  35
  36        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
  37        if (!ctx)
  38                return NULL;
  39
  40        kref_init(&ctx->ref);
  41        INIT_LIST_HEAD(&ctx->link);
  42        ctx->i915 = i915;
  43
  44        INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
  45        INIT_LIST_HEAD(&ctx->handles_list);
  46
  47        for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++) {
  48                struct intel_context *ce = &ctx->__engine[n];
  49
  50                ce->gem_context = ctx;
  51        }
  52
  53        ret = ida_simple_get(&i915->contexts.hw_ida,
  54                             0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
  55        if (ret < 0)
  56                goto err_handles;
  57        ctx->hw_id = ret;
  58
  59        if (name) {
  60                ctx->name = kstrdup(name, GFP_KERNEL);
  61                if (!ctx->name)
  62                        goto err_put;
  63
  64                ctx->ppgtt = mock_ppgtt(i915, name);
  65                if (!ctx->ppgtt)
  66                        goto err_put;
  67        }
  68
  69        return ctx;
  70
  71err_handles:
  72        kfree(ctx);
  73        return NULL;
  74
  75err_put:
  76        i915_gem_context_set_closed(ctx);
  77        i915_gem_context_put(ctx);
  78        return NULL;
  79}
  80
  81void mock_context_close(struct i915_gem_context *ctx)
  82{
  83        context_close(ctx);
  84}
  85
  86void mock_init_contexts(struct drm_i915_private *i915)
  87{
  88        INIT_LIST_HEAD(&i915->contexts.list);
  89        ida_init(&i915->contexts.hw_ida);
  90
  91        INIT_WORK(&i915->contexts.free_work, contexts_free_worker);
  92        init_llist_head(&i915->contexts.free_list);
  93}
  94
  95struct i915_gem_context *
  96live_context(struct drm_i915_private *i915, struct drm_file *file)
  97{
  98        lockdep_assert_held(&i915->drm.struct_mutex);
  99
 100        return i915_gem_create_context(i915, file->driver_priv);
 101}
 102
 103struct i915_gem_context *
 104kernel_context(struct drm_i915_private *i915)
 105{
 106        return i915_gem_context_create_kernel(i915, I915_PRIORITY_NORMAL);
 107}
 108
 109void kernel_context_close(struct i915_gem_context *ctx)
 110{
 111        context_close(ctx);
 112}
 113