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Commit 66d9cb5d authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Mock the GEM device for self-testing 



A simulacrum of drm_i915_private to let us pretend interactions with the
device.

v2: Tidy init error paths

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-6-chris@chris-wilson.co.uk
parent e62e8ad1

drivers/gpu/drm/i915/i915_drv.c

+4 −0
Original line number Diff line number Diff line
@@ -2668,3 +2668,7 @@ static struct drm_driver driver = { 
	.minor = DRIVER_MINOR,

	.patchlevel = DRIVER_PATCHLEVEL,

};



#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)

#include "selftests/mock_drm.c"

#endif

drivers/gpu/drm/i915/i915_gem.c

+1 −0
Original line number Diff line number Diff line
@@ -5023,4 +5023,5 @@ i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, 


#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)

#include "selftests/scatterlist.c"

#include "selftests/mock_gem_device.c"

#endif

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

0 → 100644
+54 −0
Original line number Diff line number Diff line 
/*

 * Copyright © 2017 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_drm.h"



static inline struct inode fake_inode(struct drm_i915_private *i915)

{

	return (struct inode){ .i_rdev = i915->drm.primary->index };

}



struct drm_file *mock_file(struct drm_i915_private *i915)

{

	struct inode inode = fake_inode(i915);

	struct file filp = {};

	struct drm_file *file;

	int err;



	err = drm_open(&inode, &filp);

	if (unlikely(err))

		return ERR_PTR(err);



	file = filp.private_data;

	file->authenticated = true;

	return file;

}



void mock_file_free(struct drm_i915_private *i915, struct drm_file *file)

{

	struct inode inode = fake_inode(i915);

	struct file filp = { .private_data = file };



	drm_release(&inode, &filp);

}

drivers/gpu/drm/i915/selftests/mock_drm.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
/*

 * Copyright © 2017 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.

 *

 */



#ifndef __MOCK_DRM_H

#define __MOCK_DRM_H



struct drm_file *mock_file(struct drm_i915_private *i915);

void mock_file_free(struct drm_i915_private *i915, struct drm_file *file);



#endif /* !__MOCK_DRM_H */

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

0 → 100644
+104 −0
Original line number Diff line number Diff line 
/*

 * 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 <linux/pm_runtime.h>



#include "mock_gem_device.h"

#include "mock_gem_object.h"



static void mock_device_release(struct drm_device *dev)

{

	struct drm_i915_private *i915 = to_i915(dev);



	i915_gem_drain_freed_objects(i915);



	kmem_cache_destroy(i915->objects);



	drm_dev_fini(&i915->drm);

	put_device(&i915->drm.pdev->dev);

}



static struct drm_driver mock_driver = {

	.name = "mock",

	.driver_features = DRIVER_GEM,

	.release = mock_device_release,



	.gem_close_object = i915_gem_close_object,

	.gem_free_object_unlocked = i915_gem_free_object,

};



static void release_dev(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);



	kfree(pdev);

}



struct drm_i915_private *mock_gem_device(void)

{

	struct drm_i915_private *i915;

	struct pci_dev *pdev;

	int err;



	pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);

	if (!pdev)

		goto err;



	device_initialize(&pdev->dev);

	pdev->dev.release = release_dev;

	dev_set_name(&pdev->dev, "mock");

	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));



	pm_runtime_dont_use_autosuspend(&pdev->dev);

	pm_runtime_get_sync(&pdev->dev);



	i915 = (struct drm_i915_private *)(pdev + 1);

	pci_set_drvdata(pdev, i915);



	err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);

	if (err) {

		pr_err("Failed to initialise mock GEM device: err=%d\n", err);

		goto put_device;

	}

	i915->drm.pdev = pdev;

	i915->drm.dev_private = i915;



	mkwrite_device_info(i915)->gen = -1;



	spin_lock_init(&i915->mm.object_stat_lock);



	INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);

	init_llist_head(&i915->mm.free_list);



	i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);

	if (!i915->objects)

		goto put_device;



	return i915;



put_device:

	put_device(&pdev->dev);

err:

	return NULL;

}