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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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c6eeb4797e
Currently we assume that we know the order in which requests run and so can determine if we need to reissue a switch-to-kernel-context prior to idling. That assumption does not hold for the future, so instead of tracking which barriers have been used, simply determine if we have ever switched away from the kernel context by using the engine and before idling ensure that all engines that have been used since the last idle are synchronously switched back to the kernel context for safety (and else of shrinking memory while idle). v2: Use intel_engine_mask_t and ALL_ENGINES Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190308093657.8640-3-chris@chris-wilson.co.uk
241 lines
6.2 KiB
C
241 lines
6.2 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include <linux/pm_domain.h>
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#include <linux/pm_runtime.h>
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#include "mock_engine.h"
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#include "mock_context.h"
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#include "mock_request.h"
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#include "mock_gem_device.h"
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#include "mock_gem_object.h"
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#include "mock_gtt.h"
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#include "mock_uncore.h"
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void mock_device_flush(struct drm_i915_private *i915)
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{
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struct intel_engine_cs *engine;
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enum intel_engine_id id;
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lockdep_assert_held(&i915->drm.struct_mutex);
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for_each_engine(engine, i915, id)
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mock_engine_flush(engine);
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i915_retire_requests(i915);
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GEM_BUG_ON(i915->gt.active_requests);
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}
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static void mock_device_release(struct drm_device *dev)
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{
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struct drm_i915_private *i915 = to_i915(dev);
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struct intel_engine_cs *engine;
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enum intel_engine_id id;
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mutex_lock(&i915->drm.struct_mutex);
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mock_device_flush(i915);
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i915_gem_contexts_lost(i915);
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mutex_unlock(&i915->drm.struct_mutex);
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drain_delayed_work(&i915->gt.retire_work);
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drain_delayed_work(&i915->gt.idle_work);
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i915_gem_drain_workqueue(i915);
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mutex_lock(&i915->drm.struct_mutex);
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for_each_engine(engine, i915, id)
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mock_engine_free(engine);
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i915_gem_contexts_fini(i915);
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mutex_unlock(&i915->drm.struct_mutex);
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i915_timelines_fini(i915);
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drain_workqueue(i915->wq);
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i915_gem_drain_freed_objects(i915);
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mutex_lock(&i915->drm.struct_mutex);
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mock_fini_ggtt(&i915->ggtt);
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mutex_unlock(&i915->drm.struct_mutex);
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destroy_workqueue(i915->wq);
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i915_gemfs_fini(i915);
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drm_mode_config_cleanup(&i915->drm);
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drm_dev_fini(&i915->drm);
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put_device(&i915->drm.pdev->dev);
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}
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static struct drm_driver mock_driver = {
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.name = "mock",
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.driver_features = DRIVER_GEM,
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.release = mock_device_release,
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.gem_close_object = i915_gem_close_object,
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.gem_free_object_unlocked = i915_gem_free_object,
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};
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static void release_dev(struct device *dev)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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kfree(pdev);
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}
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static void mock_retire_work_handler(struct work_struct *work)
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{
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}
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static void mock_idle_work_handler(struct work_struct *work)
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{
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struct drm_i915_private *i915 =
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container_of(work, typeof(*i915), gt.idle_work.work);
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i915->gt.active_engines = 0;
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}
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static int pm_domain_resume(struct device *dev)
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{
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return pm_generic_runtime_resume(dev);
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}
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static int pm_domain_suspend(struct device *dev)
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{
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return pm_generic_runtime_suspend(dev);
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}
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static struct dev_pm_domain pm_domain = {
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.ops = {
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.runtime_suspend = pm_domain_suspend,
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.runtime_resume = pm_domain_resume,
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},
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};
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struct drm_i915_private *mock_gem_device(void)
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{
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struct drm_i915_private *i915;
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struct pci_dev *pdev;
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int err;
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pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
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if (!pdev)
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goto err;
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device_initialize(&pdev->dev);
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pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
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pdev->dev.release = release_dev;
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dev_set_name(&pdev->dev, "mock");
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dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
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#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
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/* hack to disable iommu for the fake device; force identity mapping */
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pdev->dev.archdata.iommu = (void *)-1;
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#endif
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i915 = (struct drm_i915_private *)(pdev + 1);
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pci_set_drvdata(pdev, i915);
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intel_runtime_pm_init_early(i915);
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dev_pm_domain_set(&pdev->dev, &pm_domain);
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pm_runtime_enable(&pdev->dev);
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pm_runtime_dont_use_autosuspend(&pdev->dev);
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if (pm_runtime_enabled(&pdev->dev))
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WARN_ON(pm_runtime_get_sync(&pdev->dev));
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err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
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if (err) {
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pr_err("Failed to initialise mock GEM device: err=%d\n", err);
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goto put_device;
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}
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i915->drm.pdev = pdev;
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i915->drm.dev_private = i915;
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/* Using the global GTT may ask questions about KMS users, so prepare */
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drm_mode_config_init(&i915->drm);
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mkwrite_device_info(i915)->gen = -1;
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mkwrite_device_info(i915)->page_sizes =
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I915_GTT_PAGE_SIZE_4K |
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I915_GTT_PAGE_SIZE_64K |
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I915_GTT_PAGE_SIZE_2M;
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mock_uncore_init(i915);
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i915_gem_init__mm(i915);
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init_waitqueue_head(&i915->gpu_error.wait_queue);
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init_waitqueue_head(&i915->gpu_error.reset_queue);
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init_srcu_struct(&i915->gpu_error.reset_backoff_srcu);
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mutex_init(&i915->gpu_error.wedge_mutex);
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i915->wq = alloc_ordered_workqueue("mock", 0);
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if (!i915->wq)
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goto err_drv;
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mock_init_contexts(i915);
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INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
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INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);
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i915->gt.awake = true;
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i915_timelines_init(i915);
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INIT_LIST_HEAD(&i915->gt.active_rings);
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INIT_LIST_HEAD(&i915->gt.closed_vma);
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mutex_lock(&i915->drm.struct_mutex);
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mock_init_ggtt(i915, &i915->ggtt);
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mkwrite_device_info(i915)->engine_mask = BIT(0);
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i915->kernel_context = mock_context(i915, NULL);
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if (!i915->kernel_context)
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goto err_unlock;
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i915->engine[RCS0] = mock_engine(i915, "mock", RCS0);
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if (!i915->engine[RCS0])
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goto err_context;
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mutex_unlock(&i915->drm.struct_mutex);
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WARN_ON(i915_gemfs_init(i915));
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return i915;
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err_context:
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i915_gem_contexts_fini(i915);
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err_unlock:
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mutex_unlock(&i915->drm.struct_mutex);
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i915_timelines_fini(i915);
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destroy_workqueue(i915->wq);
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err_drv:
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drm_mode_config_cleanup(&i915->drm);
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drm_dev_fini(&i915->drm);
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put_device:
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put_device(&pdev->dev);
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err:
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return NULL;
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}
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