drivers/gpu/drm/i915/selftests/mock_gem_device.c - linux - Git at Google

 /*
  * 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_domain.h>
 #include <linux/pm_runtime.h>

 #include "mock_engine.h"
 #include "mock_context.h"
 #include "mock_request.h"
 #include "mock_gem_device.h"
 #include "mock_gem_object.h"
 #include "mock_gtt.h"
 #include "mock_uncore.h"

 void mock_device_flush(struct drm_i915_private *i915)
 {
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;

 	lockdep_assert_held(&i915->drm.struct_mutex);

 	for_each_engine(engine, i915, id)
 		mock_engine_flush(engine);

 	i915_retire_requests(i915);
 	GEM_BUG_ON(i915->gt.active_requests);
 }

 static void mock_device_release(struct drm_device *dev)
 {
 	struct drm_i915_private *i915 = to_i915(dev);
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;

 	mutex_lock(&i915->drm.struct_mutex);
 	mock_device_flush(i915);
 	i915_gem_contexts_lost(i915);
 	mutex_unlock(&i915->drm.struct_mutex);

 	cancel_delayed_work_sync(&i915->gt.retire_work);
 	cancel_delayed_work_sync(&i915->gt.idle_work);
 	i915_gem_drain_workqueue(i915);

 	mutex_lock(&i915->drm.struct_mutex);
 	for_each_engine(engine, i915, id)
 		mock_engine_free(engine);
 	i915_gem_contexts_fini(i915);
 	mutex_unlock(&i915->drm.struct_mutex);

 	drain_workqueue(i915->wq);
 	i915_gem_drain_freed_objects(i915);

 	mutex_lock(&i915->drm.struct_mutex);
 	mock_fini_ggtt(i915);
 	mutex_unlock(&i915->drm.struct_mutex);
 	WARN_ON(!list_empty(&i915->gt.timelines));

 	destroy_workqueue(i915->wq);

 	kmem_cache_destroy(i915->priorities);
 	kmem_cache_destroy(i915->dependencies);
 	kmem_cache_destroy(i915->requests);
 	kmem_cache_destroy(i915->vmas);
 	kmem_cache_destroy(i915->objects);

 	i915_gemfs_fini(i915);

 	drm_mode_config_cleanup(&i915->drm);

 	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);
 }

 static void mock_retire_work_handler(struct work_struct *work)
 {
 }

 static void mock_idle_work_handler(struct work_struct *work)
 {
 }

 static int pm_domain_resume(struct device *dev)
 {
 	return pm_generic_runtime_resume(dev);
 }

 static int pm_domain_suspend(struct device *dev)
 {
 	return pm_generic_runtime_suspend(dev);
 }

 static struct dev_pm_domain pm_domain = {
 	.ops = {
 		.runtime_suspend = pm_domain_suspend,
 		.runtime_resume = pm_domain_resume,
 	},
 };

 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->class = PCI_BASE_CLASS_DISPLAY << 16;
 	pdev->dev.release = release_dev;
 	dev_set_name(&pdev->dev, "mock");
 	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));

 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 	/* hack to disable iommu for the fake device; force identity mapping */
 	pdev->dev.archdata.iommu = (void *)-1;
 #endif

 	dev_pm_domain_set(&pdev->dev, &pm_domain);
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	if (pm_runtime_enabled(&pdev->dev))
 		WARN_ON(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;

 	/* Using the global GTT may ask questions about KMS users, so prepare */
 	drm_mode_config_init(&i915->drm);

 	mkwrite_device_info(i915)->gen = -1;

 	mkwrite_device_info(i915)->page_sizes =
 		I915_GTT_PAGE_SIZE_4K |
 		I915_GTT_PAGE_SIZE_64K |
 		I915_GTT_PAGE_SIZE_2M;

 	mock_uncore_init(i915);
 	i915_gem_init__mm(i915);

 	init_waitqueue_head(&i915->gpu_error.wait_queue);
 	init_waitqueue_head(&i915->gpu_error.reset_queue);

 	i915->wq = alloc_ordered_workqueue("mock", 0);
 	if (!i915->wq)
 		goto err_drv;

 	mock_init_contexts(i915);

 	INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
 	INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);

 	i915->gt.awake = true;

 	i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
 	if (!i915->objects)
 		goto err_wq;

 	i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
 	if (!i915->vmas)
 		goto err_objects;

 	i915->requests = KMEM_CACHE(mock_request,
 				    SLAB_HWCACHE_ALIGN |
 				    SLAB_RECLAIM_ACCOUNT |
 				    SLAB_TYPESAFE_BY_RCU);
 	if (!i915->requests)
 		goto err_vmas;

 	i915->dependencies = KMEM_CACHE(i915_dependency,
 					SLAB_HWCACHE_ALIGN |
 					SLAB_RECLAIM_ACCOUNT);
 	if (!i915->dependencies)
 		goto err_requests;

 	i915->priorities = KMEM_CACHE(i915_priolist, SLAB_HWCACHE_ALIGN);
 	if (!i915->priorities)
 		goto err_dependencies;

 	INIT_LIST_HEAD(&i915->gt.timelines);
 	INIT_LIST_HEAD(&i915->gt.active_rings);
 	INIT_LIST_HEAD(&i915->gt.closed_vma);

 	mutex_lock(&i915->drm.struct_mutex);

 	mock_init_ggtt(i915);

 	mkwrite_device_info(i915)->ring_mask = BIT(0);
 	i915->kernel_context = mock_context(i915, NULL);
 	if (!i915->kernel_context)
 		goto err_unlock;

 	i915->engine[RCS] = mock_engine(i915, "mock", RCS);
 	if (!i915->engine[RCS])
 		goto err_context;

 	mutex_unlock(&i915->drm.struct_mutex);

 	WARN_ON(i915_gemfs_init(i915));

 	return i915;

 err_context:
 	i915_gem_contexts_fini(i915);
 err_unlock:
 	mutex_unlock(&i915->drm.struct_mutex);
 	kmem_cache_destroy(i915->priorities);
 err_dependencies:
 	kmem_cache_destroy(i915->dependencies);
 err_requests:
 	kmem_cache_destroy(i915->requests);
 err_vmas:
 	kmem_cache_destroy(i915->vmas);
 err_objects:
 	kmem_cache_destroy(i915->objects);
 err_wq:
 	destroy_workqueue(i915->wq);
 err_drv:
 	drm_mode_config_cleanup(&i915->drm);
 	drm_dev_fini(&i915->drm);
 put_device:
 	put_device(&pdev->dev);
 err:
 	return NULL;
 }
	/*
	* 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_domain.h>
	#include <linux/pm_runtime.h>

	#include "mock_engine.h"
	#include "mock_context.h"
	#include "mock_request.h"
	#include "mock_gem_device.h"
	#include "mock_gem_object.h"
	#include "mock_gtt.h"
	#include "mock_uncore.h"

	void mock_device_flush(struct drm_i915_private *i915)
	{
	struct intel_engine_cs *engine;
	enum intel_engine_id id;

	lockdep_assert_held(&i915->drm.struct_mutex);

	for_each_engine(engine, i915, id)
	mock_engine_flush(engine);

	i915_retire_requests(i915);
	GEM_BUG_ON(i915->gt.active_requests);
	}

	static void mock_device_release(struct drm_device *dev)
	{
	struct drm_i915_private *i915 = to_i915(dev);
	struct intel_engine_cs *engine;
	enum intel_engine_id id;

	mutex_lock(&i915->drm.struct_mutex);
	mock_device_flush(i915);
	i915_gem_contexts_lost(i915);
	mutex_unlock(&i915->drm.struct_mutex);

	cancel_delayed_work_sync(&i915->gt.retire_work);
	cancel_delayed_work_sync(&i915->gt.idle_work);
	i915_gem_drain_workqueue(i915);

	mutex_lock(&i915->drm.struct_mutex);
	for_each_engine(engine, i915, id)
	mock_engine_free(engine);
	i915_gem_contexts_fini(i915);
	mutex_unlock(&i915->drm.struct_mutex);

	drain_workqueue(i915->wq);
	i915_gem_drain_freed_objects(i915);

	mutex_lock(&i915->drm.struct_mutex);
	mock_fini_ggtt(i915);
	mutex_unlock(&i915->drm.struct_mutex);
	WARN_ON(!list_empty(&i915->gt.timelines));

	destroy_workqueue(i915->wq);

	kmem_cache_destroy(i915->priorities);
	kmem_cache_destroy(i915->dependencies);
	kmem_cache_destroy(i915->requests);
	kmem_cache_destroy(i915->vmas);
	kmem_cache_destroy(i915->objects);

	i915_gemfs_fini(i915);

	drm_mode_config_cleanup(&i915->drm);

	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);
	}

	static void mock_retire_work_handler(struct work_struct *work)
	{
	}

	static void mock_idle_work_handler(struct work_struct *work)
	{
	}

	static int pm_domain_resume(struct device *dev)
	{
	return pm_generic_runtime_resume(dev);
	}

	static int pm_domain_suspend(struct device *dev)
	{
	return pm_generic_runtime_suspend(dev);
	}

	static struct dev_pm_domain pm_domain = {
	.ops = {
	.runtime_suspend = pm_domain_suspend,
	.runtime_resume = pm_domain_resume,
	},
	};

	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->class = PCI_BASE_CLASS_DISPLAY << 16;
	pdev->dev.release = release_dev;
	dev_set_name(&pdev->dev, "mock");
	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));

	#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
	/* hack to disable iommu for the fake device; force identity mapping */
	pdev->dev.archdata.iommu = (void *)-1;
	#endif

	dev_pm_domain_set(&pdev->dev, &pm_domain);
	pm_runtime_enable(&pdev->dev);
	pm_runtime_dont_use_autosuspend(&pdev->dev);
	if (pm_runtime_enabled(&pdev->dev))
	WARN_ON(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;

	/* Using the global GTT may ask questions about KMS users, so prepare */
	drm_mode_config_init(&i915->drm);

	mkwrite_device_info(i915)->gen = -1;

	mkwrite_device_info(i915)->page_sizes =
	I915_GTT_PAGE_SIZE_4K \|
	I915_GTT_PAGE_SIZE_64K \|
	I915_GTT_PAGE_SIZE_2M;

	mock_uncore_init(i915);
	i915_gem_init__mm(i915);

	init_waitqueue_head(&i915->gpu_error.wait_queue);
	init_waitqueue_head(&i915->gpu_error.reset_queue);

	i915->wq = alloc_ordered_workqueue("mock", 0);
	if (!i915->wq)
	goto err_drv;

	mock_init_contexts(i915);

	INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
	INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);

	i915->gt.awake = true;

	i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
	if (!i915->objects)
	goto err_wq;

	i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
	if (!i915->vmas)
	goto err_objects;

	i915->requests = KMEM_CACHE(mock_request,
	SLAB_HWCACHE_ALIGN \|
	SLAB_RECLAIM_ACCOUNT \|
	SLAB_TYPESAFE_BY_RCU);
	if (!i915->requests)
	goto err_vmas;

	i915->dependencies = KMEM_CACHE(i915_dependency,
	SLAB_HWCACHE_ALIGN \|
	SLAB_RECLAIM_ACCOUNT);
	if (!i915->dependencies)
	goto err_requests;

	i915->priorities = KMEM_CACHE(i915_priolist, SLAB_HWCACHE_ALIGN);
	if (!i915->priorities)
	goto err_dependencies;

	INIT_LIST_HEAD(&i915->gt.timelines);
	INIT_LIST_HEAD(&i915->gt.active_rings);
	INIT_LIST_HEAD(&i915->gt.closed_vma);

	mutex_lock(&i915->drm.struct_mutex);

	mock_init_ggtt(i915);

	mkwrite_device_info(i915)->ring_mask = BIT(0);
	i915->kernel_context = mock_context(i915, NULL);
	if (!i915->kernel_context)
	goto err_unlock;

	i915->engine[RCS] = mock_engine(i915, "mock", RCS);
	if (!i915->engine[RCS])
	goto err_context;

	mutex_unlock(&i915->drm.struct_mutex);

	WARN_ON(i915_gemfs_init(i915));

	return i915;

	err_context:
	i915_gem_contexts_fini(i915);
	err_unlock:
	mutex_unlock(&i915->drm.struct_mutex);
	kmem_cache_destroy(i915->priorities);
	err_dependencies:
	kmem_cache_destroy(i915->dependencies);
	err_requests:
	kmem_cache_destroy(i915->requests);
	err_vmas:
	kmem_cache_destroy(i915->vmas);
	err_objects:
	kmem_cache_destroy(i915->objects);
	err_wq:
	destroy_workqueue(i915->wq);
	err_drv:
	drm_mode_config_cleanup(&i915->drm);
	drm_dev_fini(&i915->drm);
	put_device:
	put_device(&pdev->dev);
	err:
	return NULL;
	}