From patchwork Thu Jul 8 17:37:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12365883 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC1A1C07E9E for ; Thu, 8 Jul 2021 17:38:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3B9561879 for ; Thu, 8 Jul 2021 17:38:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229756AbhGHRkx (ORCPT ); Thu, 8 Jul 2021 13:40:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229650AbhGHRkw (ORCPT ); Thu, 8 Jul 2021 13:40:52 -0400 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E2DEC06175F for ; Thu, 8 Jul 2021 10:38:10 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id j16-20020a05600c1c10b0290204b096b0caso4547853wms.1 for ; Thu, 08 Jul 2021 10:38:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=fJWoyA6G2JkaA69/5nx0S1j8TXeHRpIQLImqh6Ok90g=; b=Iwa4RGJc6pSVqcozSr7UVAs6Kjgohf+512xvkF19bAHlYjAb6/MrzkXrHlFYT1p8v4 hCfzIc3bXfn+YT3bIgQcfcM8/Fog5pLsCj8MiYSl000W7pH6D7a3x2idQiMAozRYokq7 aF8S+Tk0VvVe2I6JGmj0wEPEj6JdukJsWkBWY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=fJWoyA6G2JkaA69/5nx0S1j8TXeHRpIQLImqh6Ok90g=; b=aaJfmO4l07EeQynw1U086gw6wRp7Y6sU9Mz2W89aehSbo7jfjitxhnKfQEnVIu8smh da0tE3THqjp8IQXBaS419CUvUZWt9J7dhOuN9ThgoINAHUhfl900TCqCE7H0fT7RTOIL /I8e9SgBPvSm3LMGD9G8gQhM65XrjuInG2OIAbUU9EUk1XMkObBbHSlM6WibmzAcD7x/ kDFP2WtllNDYSTtOtJlkYmeaggilElfT1WMO4dSiGqsjSWNvsQzbTItoTgZj7lFJjEo6 bGikxqkZEUMBu/u2jK5vyGvJwpA3eZ7K2cwAkaHHkhcBKhlb/OVN3q64/agRAMvKcELm /S9g== X-Gm-Message-State: AOAM531aO38pOGZNMtIMWxyIcbn1LnaqdOHvoJEgfSFHdkipfRCxfz5D nutHIJqu6LVUrvm0MHdwgp7Fxw== X-Google-Smtp-Source: ABdhPJz485+ixssBY3blmTtjvLk/Z9doZfYtZuK1N73H8Y07YN8HhAWiiPAwL5W7gNTzIAgs4w2QJQ== X-Received: by 2002:a7b:c34d:: with SMTP id l13mr6523070wmj.99.1625765888779; Thu, 08 Jul 2021 10:38:08 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id l4sm2521853wme.26.2021.07.08.10.38.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 10:38:08 -0700 (PDT) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , Daniel Vetter , Melissa Wen , Steven Price , Daniel Vetter , Lucas Stach , Russell King , Christian Gmeiner , Qiang Yu , Rob Herring , Tomeu Vizoso , Alyssa Rosenzweig , David Airlie , Daniel Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Masahiro Yamada , Kees Cook , Adam Borowski , Nick Terrell , Mauro Carvalho Chehab , Paul Menzel , Sami Tolvanen , Viresh Kumar , Alex Deucher , Dave Airlie , Nirmoy Das , Deepak R Varma , Lee Jones , Kevin Wang , Chen Li , Luben Tuikov , =?utf-8?b?TWFyZWsgT2zFocOhaw==?= , Dennis Li , Maarten Lankhorst , Andrey Grodzovsky , Sonny Jiang , Boris Brezillon , Tian Tao , etnaviv@lists.freedesktop.org, lima@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Emma Anholt Subject: [PATCH v3 02/20] drm/sched: Split drm_sched_job_init Date: Thu, 8 Jul 2021 19:37:36 +0200 Message-Id: <20210708173754.3877540-3-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210708173754.3877540-1-daniel.vetter@ffwll.ch> References: <20210708173754.3877540-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This is a very confusingly named function, because not just does it init an object, it arms it and provides a point of no return for pushing a job into the scheduler. It would be nice if that's a bit clearer in the interface. But the real reason is that I want to push the dependency tracking helpers into the scheduler code, and that means drm_sched_job_init must be called a lot earlier, without arming the job. v2: - don't change .gitignore (Steven) - don't forget v3d (Emma) v3: Emma noticed that I leak the memory allocated in drm_sched_job_init if we bail out before the point of no return in subsequent driver patches. To be able to fix this change drm_sched_job_cleanup() so it can handle being called both before and after drm_sched_job_arm(). Also improve the kerneldoc for this. v4: - Fix the drm_sched_job_cleanup logic, I inverted the booleans, as usual (Melissa) - Christian pointed out that drm_sched_entity_select_rq() also needs to be moved into drm_sched_job_arm, which made me realize that the job->id definitely needs to be moved too. Shuffle things to fit between job_init and job_arm. Cc: Melissa Wen Acked-by: Steven Price (v2) Signed-off-by: Daniel Vetter Cc: Lucas Stach Cc: Russell King Cc: Christian Gmeiner Cc: Qiang Yu Cc: Rob Herring Cc: Tomeu Vizoso Cc: Steven Price Cc: Alyssa Rosenzweig Cc: David Airlie Cc: Daniel Vetter Cc: Sumit Semwal Cc: "Christian König" Cc: Masahiro Yamada Cc: Kees Cook Cc: Adam Borowski Cc: Nick Terrell Cc: Mauro Carvalho Chehab Cc: Paul Menzel Cc: Sami Tolvanen Cc: Viresh Kumar Cc: Alex Deucher Cc: Dave Airlie Cc: Nirmoy Das Cc: Deepak R Varma Cc: Lee Jones Cc: Kevin Wang Cc: Chen Li Cc: Luben Tuikov Cc: "Marek Olšák" Cc: Dennis Li Cc: Maarten Lankhorst Cc: Andrey Grodzovsky Cc: Sonny Jiang Cc: Boris Brezillon Cc: Tian Tao Cc: etnaviv@lists.freedesktop.org Cc: lima@lists.freedesktop.org Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Cc: Emma Anholt --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 2 + drivers/gpu/drm/etnaviv/etnaviv_sched.c | 2 + drivers/gpu/drm/lima/lima_sched.c | 2 + drivers/gpu/drm/panfrost/panfrost_job.c | 2 + drivers/gpu/drm/scheduler/sched_entity.c | 6 +-- drivers/gpu/drm/scheduler/sched_fence.c | 19 ++++--- drivers/gpu/drm/scheduler/sched_main.c | 64 ++++++++++++++++++++---- drivers/gpu/drm/v3d/v3d_gem.c | 2 + include/drm/gpu_scheduler.h | 7 ++- 10 files changed, 86 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index c5386d13eb4a..a4ec092af9a7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1226,6 +1226,8 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p, if (r) goto error_unlock; + drm_sched_job_arm(&job->base); + /* No memory allocation is allowed while holding the notifier lock. * The lock is held until amdgpu_cs_submit is finished and fence is * added to BOs. diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c index d33e6d97cc89..5ddb955d2315 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c @@ -170,6 +170,8 @@ int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity, if (r) return r; + drm_sched_job_arm(&job->base); + *f = dma_fence_get(&job->base.s_fence->finished); amdgpu_job_free_resources(job); drm_sched_entity_push_job(&job->base, entity); diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c index feb6da1b6ceb..05f412204118 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c @@ -163,6 +163,8 @@ int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity, if (ret) goto out_unlock; + drm_sched_job_arm(&submit->sched_job); + submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished); submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr, submit->out_fence, 0, diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index dba8329937a3..38f755580507 100644 --- a/drivers/gpu/drm/lima/lima_sched.c +++ b/drivers/gpu/drm/lima/lima_sched.c @@ -129,6 +129,8 @@ int lima_sched_task_init(struct lima_sched_task *task, return err; } + drm_sched_job_arm(&task->base); + task->num_bos = num_bos; task->vm = lima_vm_get(vm); diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 71a72fb50e6b..2992dc85325f 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -288,6 +288,8 @@ int panfrost_job_push(struct panfrost_job *job) goto unlock; } + drm_sched_job_arm(&job->base); + job->render_done_fence = dma_fence_get(&job->base.s_fence->finished); ret = panfrost_acquire_object_fences(job->bos, job->bo_count, diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index 6fc116ee7302..64d398166644 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -485,9 +485,9 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity) * @sched_job: job to submit * @entity: scheduler entity * - * Note: To guarantee that the order of insertion to queue matches - * the job's fence sequence number this function should be - * called with drm_sched_job_init under common lock. + * Note: To guarantee that the order of insertion to queue matches the job's + * fence sequence number this function should be called with drm_sched_job_arm() + * under common lock. * * Returns 0 for success, negative error code otherwise. */ diff --git a/drivers/gpu/drm/scheduler/sched_fence.c b/drivers/gpu/drm/scheduler/sched_fence.c index 69de2c76731f..bcea035cf4c6 100644 --- a/drivers/gpu/drm/scheduler/sched_fence.c +++ b/drivers/gpu/drm/scheduler/sched_fence.c @@ -90,7 +90,7 @@ static const char *drm_sched_fence_get_timeline_name(struct dma_fence *f) * * Free up the fence memory after the RCU grace period. */ -static void drm_sched_fence_free(struct rcu_head *rcu) +void drm_sched_fence_free(struct rcu_head *rcu) { struct dma_fence *f = container_of(rcu, struct dma_fence, rcu); struct drm_sched_fence *fence = to_drm_sched_fence(f); @@ -152,27 +152,32 @@ struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f) } EXPORT_SYMBOL(to_drm_sched_fence); -struct drm_sched_fence *drm_sched_fence_create(struct drm_sched_entity *entity, - void *owner) +struct drm_sched_fence *drm_sched_fence_alloc(struct drm_sched_entity *entity, + void *owner) { struct drm_sched_fence *fence = NULL; - unsigned seq; fence = kmem_cache_zalloc(sched_fence_slab, GFP_KERNEL); if (fence == NULL) return NULL; fence->owner = owner; - fence->sched = entity->rq->sched; spin_lock_init(&fence->lock); + return fence; +} + +void drm_sched_fence_init(struct drm_sched_fence *fence, + struct drm_sched_entity *entity) +{ + unsigned seq; + + fence->sched = entity->rq->sched; seq = atomic_inc_return(&entity->fence_seq); dma_fence_init(&fence->scheduled, &drm_sched_fence_ops_scheduled, &fence->lock, entity->fence_context, seq); dma_fence_init(&fence->finished, &drm_sched_fence_ops_finished, &fence->lock, entity->fence_context + 1, seq); - - return fence; } module_init(drm_sched_fence_slab_init); diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 01dd47154181..7e94754eb34c 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -48,9 +48,11 @@ #include #include #include +#include #include #include +#include #include #include @@ -569,7 +571,6 @@ EXPORT_SYMBOL(drm_sched_resubmit_jobs_ext); /** * drm_sched_job_init - init a scheduler job - * * @job: scheduler job to init * @entity: scheduler entity to use * @owner: job owner for debugging @@ -577,13 +578,45 @@ EXPORT_SYMBOL(drm_sched_resubmit_jobs_ext); * Refer to drm_sched_entity_push_job() documentation * for locking considerations. * + * Drivers must make sure drm_sched_job_cleanup() if this function returns + * successfully, even when @job is aborted before drm_sched_job_arm() is called. + * * 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) +{ + job->entity = entity; + job->s_fence = drm_sched_fence_alloc(entity, owner); + if (!job->s_fence) + return -ENOMEM; + + INIT_LIST_HEAD(&job->list); + + return 0; +} +EXPORT_SYMBOL(drm_sched_job_init); + +/** + * drm_sched_job_arm - arm a scheduler job for execution + * @job: scheduler job to arm + * + * This arms a scheduler job for execution. Specifically it initializes the + * &drm_sched_job.s_fence of @job, so that it can be attached to struct dma_resv + * or other places that need to track the completion of this job. + * + * Refer to drm_sched_entity_push_job() documentation for locking + * considerations. + * + * This can only be called if drm_sched_job_init() succeeded. + */ +void drm_sched_job_arm(struct drm_sched_job *job) { struct drm_gpu_scheduler *sched; + struct drm_sched_entity *entity = job->entity; + + BUG_ON(!entity); drm_sched_entity_select_rq(entity); BUG_ON(!entity->rq); @@ -591,27 +624,36 @@ int drm_sched_job_init(struct drm_sched_job *job, 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->list); - - return 0; + drm_sched_fence_init(job->s_fence, job->entity); } -EXPORT_SYMBOL(drm_sched_job_init); +EXPORT_SYMBOL(drm_sched_job_arm); /** * drm_sched_job_cleanup - clean up scheduler job resources - * * @job: scheduler job to clean up + * + * Cleans up the resources allocated with drm_sched_job_init(). + * + * Drivers should call this from their error unwind code if @job is aborted + * before drm_sched_job_arm() is called. + * + * After that point of no return @job is committed to be executed by the + * scheduler, and this function should be called from the + * &drm_sched_backend_ops.free_job callback. */ void drm_sched_job_cleanup(struct drm_sched_job *job) { - dma_fence_put(&job->s_fence->finished); + if (kref_read(&job->s_fence->finished.refcount)) { + /* drm_sched_job_arm() has been called */ + dma_fence_put(&job->s_fence->finished); + } else { + /* aborted job before committing to run it */ + drm_sched_fence_free(&job->s_fence->finished.rcu); + } + job->s_fence = NULL; } EXPORT_SYMBOL(drm_sched_job_cleanup); diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c index 4eb354226972..5c3a99027ecd 100644 --- a/drivers/gpu/drm/v3d/v3d_gem.c +++ b/drivers/gpu/drm/v3d/v3d_gem.c @@ -475,6 +475,8 @@ v3d_push_job(struct v3d_file_priv *v3d_priv, if (ret) return ret; + drm_sched_job_arm(&job->base); + job->done_fence = dma_fence_get(&job->base.s_fence->finished); /* put by scheduler job completion */ diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index 88ae7f331bb1..83afc3aa8e2f 100644 --- a/include/drm/gpu_scheduler.h +++ b/include/drm/gpu_scheduler.h @@ -348,6 +348,7 @@ void drm_sched_fini(struct drm_gpu_scheduler *sched); int drm_sched_job_init(struct drm_sched_job *job, struct drm_sched_entity *entity, void *owner); +void drm_sched_job_arm(struct drm_sched_job *job); void drm_sched_entity_modify_sched(struct drm_sched_entity *entity, struct drm_gpu_scheduler **sched_list, unsigned int num_sched_list); @@ -387,8 +388,12 @@ void drm_sched_entity_set_priority(struct drm_sched_entity *entity, enum drm_sched_priority priority); bool drm_sched_entity_is_ready(struct drm_sched_entity *entity); -struct drm_sched_fence *drm_sched_fence_create( +struct drm_sched_fence *drm_sched_fence_alloc( struct drm_sched_entity *s_entity, void *owner); +void drm_sched_fence_init(struct drm_sched_fence *fence, + struct drm_sched_entity *entity); +void drm_sched_fence_free(struct rcu_head *rcu); + void drm_sched_fence_scheduled(struct drm_sched_fence *fence); void drm_sched_fence_finished(struct drm_sched_fence *fence);