/**
* i915_gem_context_create_gvt - create a GVT GEM context
* @dev: drm device *
*
* This function is used to create a GVT specific GEM context.
*
* Returns:
* pointer to i915_gem_context on success, error pointer if failed
*
*/
struct i915_gem_context *
i915_gem_context_create_gvt(struct drm_device *dev)
{
struct i915_gem_context *ctx;
int ret;
if (!IS_ENABLED(CONFIG_DRM_I915_GVT))
return ERR_PTR(-ENODEV);
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ERR_PTR(ret);
ctx = __create_hw_context(to_i915(dev), NULL);
if (IS_ERR(ctx))
goto out;
ctx->file_priv = ERR_PTR(-EBADF);
i915_gem_context_set_closed(ctx); /* not user accessible */
i915_gem_context_clear_bannable(ctx);
i915_gem_context_set_force_single_submission(ctx);
if (!i915.enable_guc_submission)
ctx->ring_size = 512 * PAGE_SIZE; /* Max ring buffer size */
GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
out:
mutex_unlock(&dev->struct_mutex);
return ctx;
}
void mock_context_close(struct i915_gem_context *ctx)
{
i915_gem_context_set_closed(ctx);
i915_ppgtt_close(&ctx->ppgtt->base);
i915_gem_context_put(ctx);
}
static void context_close(struct i915_gem_context *ctx)
{
i915_gem_context_set_closed(ctx);
if (ctx->ppgtt)
i915_ppgtt_close(&ctx->ppgtt->base);
ctx->file_priv = ERR_PTR(-EBADF);
i915_gem_context_put(ctx);
}
struct i915_gem_context *
mock_context(struct drm_i915_private *i915,
const char *name)
{
struct i915_gem_context *ctx;
int ret;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
kref_init(&ctx->ref);
INIT_LIST_HEAD(&ctx->link);
ctx->i915 = i915;
ctx->vma_lut.ht_bits = VMA_HT_BITS;
ctx->vma_lut.ht_size = BIT(VMA_HT_BITS);
ctx->vma_lut.ht = kcalloc(ctx->vma_lut.ht_size,
sizeof(*ctx->vma_lut.ht),
GFP_KERNEL);
if (!ctx->vma_lut.ht)
goto err_free;
ret = ida_simple_get(&i915->context_hw_ida,
0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
if (ret < 0)
goto err_vma_ht;
ctx->hw_id = ret;
if (name) {
ctx->name = kstrdup(name, GFP_KERNEL);
if (!ctx->name)
goto err_put;
ctx->ppgtt = mock_ppgtt(i915, name);
if (!ctx->ppgtt)
goto err_put;
}
return ctx;
err_vma_ht:
kvfree(ctx->vma_lut.ht);
err_free:
kfree(ctx);
return NULL;
err_put:
i915_gem_context_set_closed(ctx);
i915_gem_context_put(ctx);
return NULL;
}
