mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 00:17:44 +00:00
6c56e8adc0
UAPI Changes: - Add support for DMA-BUF HEAPS. Cross-subsystem Changes: - mipi dsi definition updates, pulled into drm-intel as well. - Add lockdep annotations for dma_resv vs mmap_sem and fs_reclaim. - Remove support for dma-buf kmap/kunmap. - Constify fb_ops in all fbdev drivers, including drm drivers and drm-core, and media as well. Core Changes: - Small cleanups to ttm. - Fix SCDC definition. - Assorted cleanups to core. - Add todo to remove load/unload hooks, and use generic fbdev emulation. - Assorted documentation updates. - Use blocking ww lock in ttm fault handler. - Remove drm_fb_helper_fbdev_setup/teardown. - Warning fixes with W=1 for atomic. - Use drm_debug_enabled() instead of drm_debug flag testing in various drivers. - Fallback to nontiled mode in fbdev emulation when not all tiles are present. (Later on reverted) - Various kconfig indentation fixes in core and drivers. - Fix freeing transactions in dp-mst correctly. - Sean Paul is steping down as core maintainer. :-( - Add lockdep annotations for atomic locks vs dma-resv. - Prevent use-after-free for a bad job in drm_scheduler. - Fill out all block sizes in the P01x and P210 definitions. - Avoid division by zero in drm/rect, and fix bounds. - Add drm/rect selftests. - Add aspect ratio and alternate clocks for HDMI 4k modes. - Add todo for drm_framebuffer_funcs and fb_create cleanup. - Drop DRM_AUTH for prime import/export ioctls. - Clear DP-MST payload id tables downstream when initializating. - Fix for DSC throughput definition. - Add extra FEC definitions. - Fix fake offset in drm_gem_object_funs.mmap. - Stop using encoder->bridge in core directly - Handle bridge chaining slightly better. - Add backlight support to drm/panel, and use it in many panel drivers. - Increase max number of y420 modes from 128 to 256, as preparation to add the new modes. Driver Changes: - Small fixes all over. - Fix documentation in vkms. - Fix mmap_sem vs dma_resv in nouveau. - Small cleanup in komeda. - Add page flip support in gma500 for psb/cdv. - Add ddc symlink in the connector sysfs directory for many drivers. - Add support for analogic an6345, and fix small bugs in it. - Add atomic modesetting support to ast. - Fix radeon fault handler VMA race. - Switch udl to use generic shmem helpers. - Unconditional vblank handling for mcde. - Miscellaneous fixes to mcde. - Tweak debug output from komeda using debugfs. - Add gamma and color transform support to komeda for DOU-IPS. - Add support for sony acx424AKP panel. - Various small cleanups to gma500. - Use generic fbdev emulation in udl, and replace udl_framebuffer with generic implementation. - Add support for Logic PD Type 28 panel. - Use drm_panel_* wrapper functions in exynos/tegra/msm. - Add devicetree bindings for generic DSI panels. - Don't include drm_pci.h directly in many drivers. - Add support for begin/end_cpu_access in udmabuf. - Stop using drm_get_pci_dev in gma500 and mga200. - Fixes to UDL damage handling, and use dma_buf_begin/end_cpu_access. - Add devfreq thermal support to panfrost. - Fix hotplug with daisy chained monitors by removing VCPI when disabling topology manager. - meson: Add support for OSD1 plane AFBC commit. - Stop displaying garbage when toggling ast primary plane on/off. - More cleanups and fixes to UDL. - Add D32 suport to komeda. - Remove globle copy of drm_dev in gma500. - Add support for Boe Himax8279d MIPI-DSI LCD panel. - Add support for ingenic JZ4770 panel. - Small null pointer deference fix in ingenic. - Remove support for the special tfp420 driver, as there is a generic way to do it. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEuXvWqAysSYEJGuVH/lWMcqZwE8MFAl34lkkACgkQ/lWMcqZw E8M76g//WRYl9fWnV063s44FBVJYjGxaus0vQJSGidaPCIE6Ep6TNjXp8DVzV82M HR79P9glL02DC9B8pflioNNXdIRGSVk/FJcKVB2seFAqEFCAknvWDM/X/y+mOUpp fUeFl+Znlwx3YlM8f4Qujdbm+CbTewfbya4VAWeWd8XG2V8jfq5cmODPPlUMNenZ J6Ja+W3ph741uSIfAKaP69LVJgOcuUjXINE4SWhRk/i5QF3GIRej/A7ZjWGLQ/t2 2zUUF7EiCzhPomM40H3ddKtXb4ZjNJuc5pOD4GpxR8ciNbe2gUOHEZ5aenwYBdsU 5MwbxNKyMbKXATtn3yv3fSc4jH3DtmEKpmovONeO8ZDBrQBnxeYa3tQvfkNghA2f acoZMzYUImV+ft6DMIgpXppASvo7mQYDAbLPOGEJ9E44AL4UP00jesEjnK5FOHSR 3BEzGUnK/6QL5zFNPni8YZQ8dan4jDIno1mqIV+cQ4WCGlaKckzIWO6243Bf13b/ kROSJpgWkiK6Ngq0ofhD0MHyT/m1QnqUzWRKTJhRtPflSWRBsDZqWCQ5Vx1QlNIE /HfTNbTpXWwa+5wXbbB8TkDw5t9cQGnR+QcrEd9HgoIec7B5Re8rx9i0TJAT4N05 03RCQCecSfD8gwKd2wgaFIpFGRl9lTdLYSpffSmyL2X5a20lZhM= =b15X -----END PGP SIGNATURE----- Merge tag 'drm-misc-next-2019-12-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for v5.6: UAPI Changes: - Add support for DMA-BUF HEAPS. Cross-subsystem Changes: - mipi dsi definition updates, pulled into drm-intel as well. - Add lockdep annotations for dma_resv vs mmap_sem and fs_reclaim. - Remove support for dma-buf kmap/kunmap. - Constify fb_ops in all fbdev drivers, including drm drivers and drm-core, and media as well. Core Changes: - Small cleanups to ttm. - Fix SCDC definition. - Assorted cleanups to core. - Add todo to remove load/unload hooks, and use generic fbdev emulation. - Assorted documentation updates. - Use blocking ww lock in ttm fault handler. - Remove drm_fb_helper_fbdev_setup/teardown. - Warning fixes with W=1 for atomic. - Use drm_debug_enabled() instead of drm_debug flag testing in various drivers. - Fallback to nontiled mode in fbdev emulation when not all tiles are present. (Later on reverted) - Various kconfig indentation fixes in core and drivers. - Fix freeing transactions in dp-mst correctly. - Sean Paul is steping down as core maintainer. :-( - Add lockdep annotations for atomic locks vs dma-resv. - Prevent use-after-free for a bad job in drm_scheduler. - Fill out all block sizes in the P01x and P210 definitions. - Avoid division by zero in drm/rect, and fix bounds. - Add drm/rect selftests. - Add aspect ratio and alternate clocks for HDMI 4k modes. - Add todo for drm_framebuffer_funcs and fb_create cleanup. - Drop DRM_AUTH for prime import/export ioctls. - Clear DP-MST payload id tables downstream when initializating. - Fix for DSC throughput definition. - Add extra FEC definitions. - Fix fake offset in drm_gem_object_funs.mmap. - Stop using encoder->bridge in core directly - Handle bridge chaining slightly better. - Add backlight support to drm/panel, and use it in many panel drivers. - Increase max number of y420 modes from 128 to 256, as preparation to add the new modes. Driver Changes: - Small fixes all over. - Fix documentation in vkms. - Fix mmap_sem vs dma_resv in nouveau. - Small cleanup in komeda. - Add page flip support in gma500 for psb/cdv. - Add ddc symlink in the connector sysfs directory for many drivers. - Add support for analogic an6345, and fix small bugs in it. - Add atomic modesetting support to ast. - Fix radeon fault handler VMA race. - Switch udl to use generic shmem helpers. - Unconditional vblank handling for mcde. - Miscellaneous fixes to mcde. - Tweak debug output from komeda using debugfs. - Add gamma and color transform support to komeda for DOU-IPS. - Add support for sony acx424AKP panel. - Various small cleanups to gma500. - Use generic fbdev emulation in udl, and replace udl_framebuffer with generic implementation. - Add support for Logic PD Type 28 panel. - Use drm_panel_* wrapper functions in exynos/tegra/msm. - Add devicetree bindings for generic DSI panels. - Don't include drm_pci.h directly in many drivers. - Add support for begin/end_cpu_access in udmabuf. - Stop using drm_get_pci_dev in gma500 and mga200. - Fixes to UDL damage handling, and use dma_buf_begin/end_cpu_access. - Add devfreq thermal support to panfrost. - Fix hotplug with daisy chained monitors by removing VCPI when disabling topology manager. - meson: Add support for OSD1 plane AFBC commit. - Stop displaying garbage when toggling ast primary plane on/off. - More cleanups and fixes to UDL. - Add D32 suport to komeda. - Remove globle copy of drm_dev in gma500. - Add support for Boe Himax8279d MIPI-DSI LCD panel. - Add support for ingenic JZ4770 panel. - Small null pointer deference fix in ingenic. - Remove support for the special tfp420 driver, as there is a generic way to do it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/ba73535a-9334-5302-2e1f-5208bd7390bd@linux.intel.com
864 lines
23 KiB
C
864 lines
23 KiB
C
/*
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* Copyright 2015 Advanced Micro Devices, Inc.
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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 shall be included in
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* all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/**
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* DOC: Overview
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*
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* The GPU scheduler provides entities which allow userspace to push jobs
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* into software queues which are then scheduled on a hardware run queue.
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* The software queues have a priority among them. The scheduler selects the entities
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* from the run queue using a FIFO. The scheduler provides dependency handling
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* features among jobs. The driver is supposed to provide callback functions for
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* backend operations to the scheduler like submitting a job to hardware run queue,
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* returning the dependencies of a job etc.
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*
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* The organisation of the scheduler is the following:
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*
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* 1. Each hw run queue has one scheduler
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* 2. Each scheduler has multiple run queues with different priorities
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* (e.g., HIGH_HW,HIGH_SW, KERNEL, NORMAL)
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* 3. Each scheduler run queue has a queue of entities to schedule
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* 4. Entities themselves maintain a queue of jobs that will be scheduled on
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* the hardware.
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*
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* The jobs in a entity are always scheduled in the order that they were pushed.
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*/
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#include <linux/kthread.h>
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#include <linux/wait.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <uapi/linux/sched/types.h>
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#include <drm/drm_print.h>
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#include <drm/gpu_scheduler.h>
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#include <drm/spsc_queue.h>
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#define CREATE_TRACE_POINTS
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#include "gpu_scheduler_trace.h"
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#define to_drm_sched_job(sched_job) \
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container_of((sched_job), struct drm_sched_job, queue_node)
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static void drm_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb);
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/**
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* drm_sched_rq_init - initialize a given run queue struct
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*
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* @rq: scheduler run queue
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*
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* Initializes a scheduler runqueue.
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*/
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static void drm_sched_rq_init(struct drm_gpu_scheduler *sched,
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struct drm_sched_rq *rq)
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{
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spin_lock_init(&rq->lock);
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INIT_LIST_HEAD(&rq->entities);
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rq->current_entity = NULL;
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rq->sched = sched;
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}
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/**
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* drm_sched_rq_add_entity - add an entity
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*
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* @rq: scheduler run queue
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* @entity: scheduler entity
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*
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* Adds a scheduler entity to the run queue.
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*/
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void drm_sched_rq_add_entity(struct drm_sched_rq *rq,
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struct drm_sched_entity *entity)
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{
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if (!list_empty(&entity->list))
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return;
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spin_lock(&rq->lock);
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list_add_tail(&entity->list, &rq->entities);
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spin_unlock(&rq->lock);
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}
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/**
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* drm_sched_rq_remove_entity - remove an entity
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*
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* @rq: scheduler run queue
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* @entity: scheduler entity
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*
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* Removes a scheduler entity from the run queue.
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*/
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void drm_sched_rq_remove_entity(struct drm_sched_rq *rq,
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struct drm_sched_entity *entity)
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{
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if (list_empty(&entity->list))
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return;
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spin_lock(&rq->lock);
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list_del_init(&entity->list);
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if (rq->current_entity == entity)
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rq->current_entity = NULL;
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spin_unlock(&rq->lock);
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}
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/**
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* drm_sched_rq_select_entity - Select an entity which could provide a job to run
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*
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* @rq: scheduler run queue to check.
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*
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* Try to find a ready entity, returns NULL if none found.
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*/
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static struct drm_sched_entity *
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drm_sched_rq_select_entity(struct drm_sched_rq *rq)
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{
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struct drm_sched_entity *entity;
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spin_lock(&rq->lock);
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entity = rq->current_entity;
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if (entity) {
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list_for_each_entry_continue(entity, &rq->entities, list) {
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if (drm_sched_entity_is_ready(entity)) {
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rq->current_entity = entity;
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reinit_completion(&entity->entity_idle);
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spin_unlock(&rq->lock);
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return entity;
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}
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}
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}
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list_for_each_entry(entity, &rq->entities, list) {
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if (drm_sched_entity_is_ready(entity)) {
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rq->current_entity = entity;
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reinit_completion(&entity->entity_idle);
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spin_unlock(&rq->lock);
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return entity;
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}
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if (entity == rq->current_entity)
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break;
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}
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spin_unlock(&rq->lock);
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return NULL;
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}
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/**
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* drm_sched_dependency_optimized
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*
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* @fence: the dependency fence
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* @entity: the entity which depends on the above fence
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*
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* Returns true if the dependency can be optimized and false otherwise
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*/
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bool drm_sched_dependency_optimized(struct dma_fence* fence,
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struct drm_sched_entity *entity)
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{
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struct drm_gpu_scheduler *sched = entity->rq->sched;
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struct drm_sched_fence *s_fence;
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if (!fence || dma_fence_is_signaled(fence))
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return false;
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if (fence->context == entity->fence_context)
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return true;
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s_fence = to_drm_sched_fence(fence);
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if (s_fence && s_fence->sched == sched)
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_sched_dependency_optimized);
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/**
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* drm_sched_start_timeout - start timeout for reset worker
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*
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* @sched: scheduler instance to start the worker for
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*
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* Start the timeout for the given scheduler.
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*/
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static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched)
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{
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if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
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!list_empty(&sched->ring_mirror_list))
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schedule_delayed_work(&sched->work_tdr, sched->timeout);
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}
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/**
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* drm_sched_fault - immediately start timeout handler
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*
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* @sched: scheduler where the timeout handling should be started.
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*
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* Start timeout handling immediately when the driver detects a hardware fault.
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*/
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void drm_sched_fault(struct drm_gpu_scheduler *sched)
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{
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mod_delayed_work(system_wq, &sched->work_tdr, 0);
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}
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EXPORT_SYMBOL(drm_sched_fault);
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/**
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* drm_sched_suspend_timeout - Suspend scheduler job timeout
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*
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* @sched: scheduler instance for which to suspend the timeout
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*
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* Suspend the delayed work timeout for the scheduler. This is done by
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* modifying the delayed work timeout to an arbitrary large value,
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* MAX_SCHEDULE_TIMEOUT in this case. Note that this function can be
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* called from an IRQ context.
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*
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* Returns the timeout remaining
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*
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*/
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unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched)
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{
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unsigned long sched_timeout, now = jiffies;
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sched_timeout = sched->work_tdr.timer.expires;
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/*
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* Modify the timeout to an arbitrarily large value. This also prevents
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* the timeout to be restarted when new submissions arrive
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*/
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if (mod_delayed_work(system_wq, &sched->work_tdr, MAX_SCHEDULE_TIMEOUT)
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&& time_after(sched_timeout, now))
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return sched_timeout - now;
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else
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return sched->timeout;
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}
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EXPORT_SYMBOL(drm_sched_suspend_timeout);
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/**
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* drm_sched_resume_timeout - Resume scheduler job timeout
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*
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* @sched: scheduler instance for which to resume the timeout
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* @remaining: remaining timeout
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*
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* Resume the delayed work timeout for the scheduler. Note that
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* this function can be called from an IRQ context.
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*/
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void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
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unsigned long remaining)
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{
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unsigned long flags;
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spin_lock_irqsave(&sched->job_list_lock, flags);
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if (list_empty(&sched->ring_mirror_list))
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cancel_delayed_work(&sched->work_tdr);
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else
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mod_delayed_work(system_wq, &sched->work_tdr, remaining);
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spin_unlock_irqrestore(&sched->job_list_lock, flags);
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}
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EXPORT_SYMBOL(drm_sched_resume_timeout);
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static void drm_sched_job_begin(struct drm_sched_job *s_job)
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{
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struct drm_gpu_scheduler *sched = s_job->sched;
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unsigned long flags;
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spin_lock_irqsave(&sched->job_list_lock, flags);
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list_add_tail(&s_job->node, &sched->ring_mirror_list);
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drm_sched_start_timeout(sched);
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spin_unlock_irqrestore(&sched->job_list_lock, flags);
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}
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static void drm_sched_job_timedout(struct work_struct *work)
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{
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struct drm_gpu_scheduler *sched;
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struct drm_sched_job *job;
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unsigned long flags;
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sched = container_of(work, struct drm_gpu_scheduler, work_tdr.work);
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/* Protects against concurrent deletion in drm_sched_get_cleanup_job */
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spin_lock_irqsave(&sched->job_list_lock, flags);
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job = list_first_entry_or_null(&sched->ring_mirror_list,
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struct drm_sched_job, node);
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if (job) {
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/*
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* Remove the bad job so it cannot be freed by concurrent
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* drm_sched_cleanup_jobs. It will be reinserted back after sched->thread
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* is parked at which point it's safe.
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*/
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list_del_init(&job->node);
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spin_unlock_irqrestore(&sched->job_list_lock, flags);
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job->sched->ops->timedout_job(job);
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/*
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* Guilty job did complete and hence needs to be manually removed
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* See drm_sched_stop doc.
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*/
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if (sched->free_guilty) {
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job->sched->ops->free_job(job);
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sched->free_guilty = false;
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}
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} else {
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spin_unlock_irqrestore(&sched->job_list_lock, flags);
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}
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spin_lock_irqsave(&sched->job_list_lock, flags);
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drm_sched_start_timeout(sched);
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spin_unlock_irqrestore(&sched->job_list_lock, flags);
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}
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/**
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* drm_sched_increase_karma - Update sched_entity guilty flag
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*
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* @bad: The job guilty of time out
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*
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* Increment on every hang caused by the 'bad' job. If this exceeds the hang
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* limit of the scheduler then the respective sched entity is marked guilty and
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* jobs from it will not be scheduled further
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*/
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void drm_sched_increase_karma(struct drm_sched_job *bad)
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{
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int i;
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struct drm_sched_entity *tmp;
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struct drm_sched_entity *entity;
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struct drm_gpu_scheduler *sched = bad->sched;
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/* don't increase @bad's karma if it's from KERNEL RQ,
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* because sometimes GPU hang would cause kernel jobs (like VM updating jobs)
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* corrupt but keep in mind that kernel jobs always considered good.
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*/
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if (bad->s_priority != DRM_SCHED_PRIORITY_KERNEL) {
|
|
atomic_inc(&bad->karma);
|
|
for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_KERNEL;
|
|
i++) {
|
|
struct drm_sched_rq *rq = &sched->sched_rq[i];
|
|
|
|
spin_lock(&rq->lock);
|
|
list_for_each_entry_safe(entity, tmp, &rq->entities, list) {
|
|
if (bad->s_fence->scheduled.context ==
|
|
entity->fence_context) {
|
|
if (atomic_read(&bad->karma) >
|
|
bad->sched->hang_limit)
|
|
if (entity->guilty)
|
|
atomic_set(entity->guilty, 1);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&rq->lock);
|
|
if (&entity->list != &rq->entities)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_increase_karma);
|
|
|
|
/**
|
|
* drm_sched_stop - stop the scheduler
|
|
*
|
|
* @sched: scheduler instance
|
|
* @bad: job which caused the time out
|
|
*
|
|
* Stop the scheduler and also removes and frees all completed jobs.
|
|
* Note: bad job will not be freed as it might be used later and so it's
|
|
* callers responsibility to release it manually if it's not part of the
|
|
* mirror list any more.
|
|
*
|
|
*/
|
|
void drm_sched_stop(struct drm_gpu_scheduler *sched, struct drm_sched_job *bad)
|
|
{
|
|
struct drm_sched_job *s_job, *tmp;
|
|
unsigned long flags;
|
|
|
|
kthread_park(sched->thread);
|
|
|
|
/*
|
|
* Reinsert back the bad job here - now it's safe as
|
|
* drm_sched_get_cleanup_job cannot race against us and release the
|
|
* bad job at this point - we parked (waited for) any in progress
|
|
* (earlier) cleanups and drm_sched_get_cleanup_job will not be called
|
|
* now until the scheduler thread is unparked.
|
|
*/
|
|
if (bad && bad->sched == sched)
|
|
/*
|
|
* Add at the head of the queue to reflect it was the earliest
|
|
* job extracted.
|
|
*/
|
|
list_add(&bad->node, &sched->ring_mirror_list);
|
|
|
|
/*
|
|
* Iterate the job list from later to earlier one and either deactive
|
|
* their HW callbacks or remove them from mirror list if they already
|
|
* signaled.
|
|
* This iteration is thread safe as sched thread is stopped.
|
|
*/
|
|
list_for_each_entry_safe_reverse(s_job, tmp, &sched->ring_mirror_list, node) {
|
|
if (s_job->s_fence->parent &&
|
|
dma_fence_remove_callback(s_job->s_fence->parent,
|
|
&s_job->cb)) {
|
|
atomic_dec(&sched->hw_rq_count);
|
|
} else {
|
|
/*
|
|
* remove job from ring_mirror_list.
|
|
* Locking here is for concurrent resume timeout
|
|
*/
|
|
spin_lock_irqsave(&sched->job_list_lock, flags);
|
|
list_del_init(&s_job->node);
|
|
spin_unlock_irqrestore(&sched->job_list_lock, flags);
|
|
|
|
/*
|
|
* Wait for job's HW fence callback to finish using s_job
|
|
* before releasing it.
|
|
*
|
|
* Job is still alive so fence refcount at least 1
|
|
*/
|
|
dma_fence_wait(&s_job->s_fence->finished, false);
|
|
|
|
/*
|
|
* We must keep bad job alive for later use during
|
|
* recovery by some of the drivers but leave a hint
|
|
* that the guilty job must be released.
|
|
*/
|
|
if (bad != s_job)
|
|
sched->ops->free_job(s_job);
|
|
else
|
|
sched->free_guilty = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Stop pending timer in flight as we rearm it in drm_sched_start. This
|
|
* avoids the pending timeout work in progress to fire right away after
|
|
* this TDR finished and before the newly restarted jobs had a
|
|
* chance to complete.
|
|
*/
|
|
cancel_delayed_work(&sched->work_tdr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_sched_stop);
|
|
|
|
/**
|
|
* drm_sched_job_recovery - recover jobs after a reset
|
|
*
|
|
* @sched: scheduler instance
|
|
* @full_recovery: proceed with complete sched restart
|
|
*
|
|
*/
|
|
void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
|
|
{
|
|
struct drm_sched_job *s_job, *tmp;
|
|
unsigned long flags;
|
|
int r;
|
|
|
|
/*
|
|
* Locking the list is not required here as the sched thread is parked
|
|
* so no new jobs are being inserted or removed. Also concurrent
|
|
* GPU recovers can't run in parallel.
|
|
*/
|
|
list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, node) {
|
|
struct dma_fence *fence = s_job->s_fence->parent;
|
|
|
|
atomic_inc(&sched->hw_rq_count);
|
|
|
|
if (!full_recovery)
|
|
continue;
|
|
|
|
if (fence) {
|
|
r = dma_fence_add_callback(fence, &s_job->cb,
|
|
drm_sched_process_job);
|
|
if (r == -ENOENT)
|
|
drm_sched_process_job(fence, &s_job->cb);
|
|
else if (r)
|
|
DRM_ERROR("fence add callback failed (%d)\n",
|
|
r);
|
|
} else
|
|
drm_sched_process_job(NULL, &s_job->cb);
|
|
}
|
|
|
|
if (full_recovery) {
|
|
spin_lock_irqsave(&sched->job_list_lock, flags);
|
|
drm_sched_start_timeout(sched);
|
|
spin_unlock_irqrestore(&sched->job_list_lock, flags);
|
|
}
|
|
|
|
kthread_unpark(sched->thread);
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_start);
|
|
|
|
/**
|
|
* drm_sched_resubmit_jobs - helper to relunch job from mirror ring list
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
*/
|
|
void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched)
|
|
{
|
|
struct drm_sched_job *s_job, *tmp;
|
|
uint64_t guilty_context;
|
|
bool found_guilty = false;
|
|
struct dma_fence *fence;
|
|
|
|
list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, node) {
|
|
struct drm_sched_fence *s_fence = s_job->s_fence;
|
|
|
|
if (!found_guilty && atomic_read(&s_job->karma) > sched->hang_limit) {
|
|
found_guilty = true;
|
|
guilty_context = s_job->s_fence->scheduled.context;
|
|
}
|
|
|
|
if (found_guilty && s_job->s_fence->scheduled.context == guilty_context)
|
|
dma_fence_set_error(&s_fence->finished, -ECANCELED);
|
|
|
|
dma_fence_put(s_job->s_fence->parent);
|
|
fence = sched->ops->run_job(s_job);
|
|
|
|
if (IS_ERR_OR_NULL(fence)) {
|
|
if (IS_ERR(fence))
|
|
dma_fence_set_error(&s_fence->finished, PTR_ERR(fence));
|
|
|
|
s_job->s_fence->parent = NULL;
|
|
} else {
|
|
s_job->s_fence->parent = fence;
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_resubmit_jobs);
|
|
|
|
/**
|
|
* drm_sched_job_init - init a scheduler job
|
|
*
|
|
* @job: scheduler job to init
|
|
* @entity: scheduler entity to use
|
|
* @owner: job owner for debugging
|
|
*
|
|
* Refer to drm_sched_entity_push_job() documentation
|
|
* for locking considerations.
|
|
*
|
|
* Returns 0 for success, negative error code otherwise.
|
|
*/
|
|
int drm_sched_job_init(struct drm_sched_job *job,
|
|
struct drm_sched_entity *entity,
|
|
void *owner)
|
|
{
|
|
struct drm_gpu_scheduler *sched;
|
|
|
|
drm_sched_entity_select_rq(entity);
|
|
if (!entity->rq)
|
|
return -ENOENT;
|
|
|
|
sched = entity->rq->sched;
|
|
|
|
job->sched = sched;
|
|
job->entity = entity;
|
|
job->s_priority = entity->rq - sched->sched_rq;
|
|
job->s_fence = drm_sched_fence_create(entity, owner);
|
|
if (!job->s_fence)
|
|
return -ENOMEM;
|
|
job->id = atomic64_inc_return(&sched->job_id_count);
|
|
|
|
INIT_LIST_HEAD(&job->node);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_job_init);
|
|
|
|
/**
|
|
* drm_sched_job_cleanup - clean up scheduler job resources
|
|
*
|
|
* @job: scheduler job to clean up
|
|
*/
|
|
void drm_sched_job_cleanup(struct drm_sched_job *job)
|
|
{
|
|
dma_fence_put(&job->s_fence->finished);
|
|
job->s_fence = NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_job_cleanup);
|
|
|
|
/**
|
|
* drm_sched_ready - is the scheduler ready
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
* Return true if we can push more jobs to the hw, otherwise false.
|
|
*/
|
|
static bool drm_sched_ready(struct drm_gpu_scheduler *sched)
|
|
{
|
|
return atomic_read(&sched->hw_rq_count) <
|
|
sched->hw_submission_limit;
|
|
}
|
|
|
|
/**
|
|
* drm_sched_wakeup - Wake up the scheduler when it is ready
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
*/
|
|
void drm_sched_wakeup(struct drm_gpu_scheduler *sched)
|
|
{
|
|
if (drm_sched_ready(sched))
|
|
wake_up_interruptible(&sched->wake_up_worker);
|
|
}
|
|
|
|
/**
|
|
* drm_sched_select_entity - Select next entity to process
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
* Returns the entity to process or NULL if none are found.
|
|
*/
|
|
static struct drm_sched_entity *
|
|
drm_sched_select_entity(struct drm_gpu_scheduler *sched)
|
|
{
|
|
struct drm_sched_entity *entity;
|
|
int i;
|
|
|
|
if (!drm_sched_ready(sched))
|
|
return NULL;
|
|
|
|
/* Kernel run queue has higher priority than normal run queue*/
|
|
for (i = DRM_SCHED_PRIORITY_MAX - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
|
|
entity = drm_sched_rq_select_entity(&sched->sched_rq[i]);
|
|
if (entity)
|
|
break;
|
|
}
|
|
|
|
return entity;
|
|
}
|
|
|
|
/**
|
|
* drm_sched_process_job - process a job
|
|
*
|
|
* @f: fence
|
|
* @cb: fence callbacks
|
|
*
|
|
* Called after job has finished execution.
|
|
*/
|
|
static void drm_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb)
|
|
{
|
|
struct drm_sched_job *s_job = container_of(cb, struct drm_sched_job, cb);
|
|
struct drm_sched_fence *s_fence = s_job->s_fence;
|
|
struct drm_gpu_scheduler *sched = s_fence->sched;
|
|
|
|
atomic_dec(&sched->hw_rq_count);
|
|
atomic_dec(&sched->num_jobs);
|
|
|
|
trace_drm_sched_process_job(s_fence);
|
|
|
|
drm_sched_fence_finished(s_fence);
|
|
wake_up_interruptible(&sched->wake_up_worker);
|
|
}
|
|
|
|
/**
|
|
* drm_sched_get_cleanup_job - fetch the next finished job to be destroyed
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
* Returns the next finished job from the mirror list (if there is one)
|
|
* ready for it to be destroyed.
|
|
*/
|
|
static struct drm_sched_job *
|
|
drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
|
|
{
|
|
struct drm_sched_job *job;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* Don't destroy jobs while the timeout worker is running OR thread
|
|
* is being parked and hence assumed to not touch ring_mirror_list
|
|
*/
|
|
if ((sched->timeout != MAX_SCHEDULE_TIMEOUT &&
|
|
!cancel_delayed_work(&sched->work_tdr)) ||
|
|
__kthread_should_park(sched->thread))
|
|
return NULL;
|
|
|
|
spin_lock_irqsave(&sched->job_list_lock, flags);
|
|
|
|
job = list_first_entry_or_null(&sched->ring_mirror_list,
|
|
struct drm_sched_job, node);
|
|
|
|
if (job && dma_fence_is_signaled(&job->s_fence->finished)) {
|
|
/* remove job from ring_mirror_list */
|
|
list_del_init(&job->node);
|
|
} else {
|
|
job = NULL;
|
|
/* queue timeout for next job */
|
|
drm_sched_start_timeout(sched);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sched->job_list_lock, flags);
|
|
|
|
return job;
|
|
}
|
|
|
|
/**
|
|
* drm_sched_blocked - check if the scheduler is blocked
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
* Returns true if blocked, otherwise false.
|
|
*/
|
|
static bool drm_sched_blocked(struct drm_gpu_scheduler *sched)
|
|
{
|
|
if (kthread_should_park()) {
|
|
kthread_parkme();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* drm_sched_main - main scheduler thread
|
|
*
|
|
* @param: scheduler instance
|
|
*
|
|
* Returns 0.
|
|
*/
|
|
static int drm_sched_main(void *param)
|
|
{
|
|
struct sched_param sparam = {.sched_priority = 1};
|
|
struct drm_gpu_scheduler *sched = (struct drm_gpu_scheduler *)param;
|
|
int r;
|
|
|
|
sched_setscheduler(current, SCHED_FIFO, &sparam);
|
|
|
|
while (!kthread_should_stop()) {
|
|
struct drm_sched_entity *entity = NULL;
|
|
struct drm_sched_fence *s_fence;
|
|
struct drm_sched_job *sched_job;
|
|
struct dma_fence *fence;
|
|
struct drm_sched_job *cleanup_job = NULL;
|
|
|
|
wait_event_interruptible(sched->wake_up_worker,
|
|
(cleanup_job = drm_sched_get_cleanup_job(sched)) ||
|
|
(!drm_sched_blocked(sched) &&
|
|
(entity = drm_sched_select_entity(sched))) ||
|
|
kthread_should_stop());
|
|
|
|
if (cleanup_job) {
|
|
sched->ops->free_job(cleanup_job);
|
|
/* queue timeout for next job */
|
|
drm_sched_start_timeout(sched);
|
|
}
|
|
|
|
if (!entity)
|
|
continue;
|
|
|
|
sched_job = drm_sched_entity_pop_job(entity);
|
|
|
|
complete(&entity->entity_idle);
|
|
|
|
if (!sched_job)
|
|
continue;
|
|
|
|
s_fence = sched_job->s_fence;
|
|
|
|
atomic_inc(&sched->hw_rq_count);
|
|
drm_sched_job_begin(sched_job);
|
|
|
|
fence = sched->ops->run_job(sched_job);
|
|
drm_sched_fence_scheduled(s_fence);
|
|
|
|
if (!IS_ERR_OR_NULL(fence)) {
|
|
s_fence->parent = dma_fence_get(fence);
|
|
r = dma_fence_add_callback(fence, &sched_job->cb,
|
|
drm_sched_process_job);
|
|
if (r == -ENOENT)
|
|
drm_sched_process_job(fence, &sched_job->cb);
|
|
else if (r)
|
|
DRM_ERROR("fence add callback failed (%d)\n",
|
|
r);
|
|
dma_fence_put(fence);
|
|
} else {
|
|
if (IS_ERR(fence))
|
|
dma_fence_set_error(&s_fence->finished, PTR_ERR(fence));
|
|
|
|
drm_sched_process_job(NULL, &sched_job->cb);
|
|
}
|
|
|
|
wake_up(&sched->job_scheduled);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_sched_init - Init a gpu scheduler instance
|
|
*
|
|
* @sched: scheduler instance
|
|
* @ops: backend operations for this scheduler
|
|
* @hw_submission: number of hw submissions that can be in flight
|
|
* @hang_limit: number of times to allow a job to hang before dropping it
|
|
* @timeout: timeout value in jiffies for the scheduler
|
|
* @name: name used for debugging
|
|
*
|
|
* Return 0 on success, otherwise error code.
|
|
*/
|
|
int drm_sched_init(struct drm_gpu_scheduler *sched,
|
|
const struct drm_sched_backend_ops *ops,
|
|
unsigned hw_submission,
|
|
unsigned hang_limit,
|
|
long timeout,
|
|
const char *name)
|
|
{
|
|
int i, ret;
|
|
sched->ops = ops;
|
|
sched->hw_submission_limit = hw_submission;
|
|
sched->name = name;
|
|
sched->timeout = timeout;
|
|
sched->hang_limit = hang_limit;
|
|
for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_MAX; i++)
|
|
drm_sched_rq_init(sched, &sched->sched_rq[i]);
|
|
|
|
init_waitqueue_head(&sched->wake_up_worker);
|
|
init_waitqueue_head(&sched->job_scheduled);
|
|
INIT_LIST_HEAD(&sched->ring_mirror_list);
|
|
spin_lock_init(&sched->job_list_lock);
|
|
atomic_set(&sched->hw_rq_count, 0);
|
|
INIT_DELAYED_WORK(&sched->work_tdr, drm_sched_job_timedout);
|
|
atomic_set(&sched->num_jobs, 0);
|
|
atomic64_set(&sched->job_id_count, 0);
|
|
|
|
/* Each scheduler will run on a seperate kernel thread */
|
|
sched->thread = kthread_run(drm_sched_main, sched, sched->name);
|
|
if (IS_ERR(sched->thread)) {
|
|
ret = PTR_ERR(sched->thread);
|
|
sched->thread = NULL;
|
|
DRM_ERROR("Failed to create scheduler for %s.\n", name);
|
|
return ret;
|
|
}
|
|
|
|
sched->ready = true;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_init);
|
|
|
|
/**
|
|
* drm_sched_fini - Destroy a gpu scheduler
|
|
*
|
|
* @sched: scheduler instance
|
|
*
|
|
* Tears down and cleans up the scheduler.
|
|
*/
|
|
void drm_sched_fini(struct drm_gpu_scheduler *sched)
|
|
{
|
|
if (sched->thread)
|
|
kthread_stop(sched->thread);
|
|
|
|
sched->ready = false;
|
|
}
|
|
EXPORT_SYMBOL(drm_sched_fini);
|