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

/*
 * Copyright © 2016 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include "mock_context.h"
#include "mock_gtt.h"

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;

	ret = ida_simple_get(&i915->context_hw_ida,
			     0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
	if (ret < 0)
		goto err_free;
	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_free:
	kfree(ctx);
	return NULL;

err_put:
	i915_gem_context_set_closed(ctx);
	i915_gem_context_put(ctx);
	return NULL;
}

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);
}