From patchwork Mon Jul 12 17:53:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12372173 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 2D3B0C07E9C for ; Mon, 12 Jul 2021 20:02:04 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A905D611F1 for ; Mon, 12 Jul 2021 20:02:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A905D611F1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 236D189DB9; Mon, 12 Jul 2021 20:02:02 +0000 (UTC) Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2452E89DB4 for ; Mon, 12 Jul 2021 20:02:00 +0000 (UTC) Received: by mail-wm1-x32c.google.com with SMTP id i2-20020a05600c3542b02902058529ea07so793858wmq.3 for ; Mon, 12 Jul 2021 13:02:00 -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=aE98VC97LN5Nqp+0MG2+h50KKV7cu4xcH8PWUncKwaY=; b=h3Ig1hEfjh3VD6Zy30yh1/v5YUz6Yk2t+oWLzYAivZaiuQl8DfJnAwdN/8lLz7K4m7 t0eWznTCuF1S0OthzaX/saY4xad9Bp4ZCEnKPkyQRZ4mm80pCYC4iMzSudB0hZhPQGN+ 3q8hUGz48CAP/x9FP0jtLXZnZtVxBtGJ8tAWE= 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=aE98VC97LN5Nqp+0MG2+h50KKV7cu4xcH8PWUncKwaY=; b=e0ArI+GhaAQcxmjeRHrnem01JSpic7waQ6e18grrylwH/XFpd284yXIzTu2YB/BLNt JGC2jeG6pw8eE8dQYO3mGVZDOIkzso8Pt5vg8l8ZcR9GPU7ix4CuJ8GYMpcwkri5Apos XjTgYKHfvBkHG80pXvVHKXSi461UIFuMKu0ZNSrM3sFYMK8DxPgiz1DaMqGlOkevwoEp 5n11FEdfewFU2BFE8QEXjiou+30qwk3BtI8hMqxi5n0h2QJwP5vaKY7uR2+EQquoB02C iR3p+02THMZRzERjgZBblEITv5wWU1UiyRElvZi851MvF+1ued9GJF3FyRJ4+n5ovSn8 EdTQ== X-Gm-Message-State: AOAM531Wb7U9RVIM8y6oBjpGAKFLp71Gi9WYDd4ipzURLGxxgkqhGiCl wmJ8MwKXYk7Gx4c9+erf9BKZig== X-Google-Smtp-Source: ABdhPJyHMhofiyJOtKyZPn+g6zkAGi0VleKW336mB9oaw/E8Y2sgUk5ShU5Ucb8dyoqwyHuOJvlbqA== X-Received: by 2002:a1c:4e1a:: with SMTP id g26mr957980wmh.62.1626120118679; Mon, 12 Jul 2021 13:01:58 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id l14sm9858221wrs.22.2021.07.12.13.01.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jul 2021 13:01:58 -0700 (PDT) From: Daniel Vetter To: DRI Development Date: Mon, 12 Jul 2021 19:53:35 +0200 Message-Id: <20210712175352.802687-2-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712175352.802687-1-daniel.vetter@ffwll.ch> References: <20210712175352.802687-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 01/18] drm/sched: Split drm_sched_job_init X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Emma Anholt , Adam Borowski , David Airlie , Daniel Vetter , Melissa Wen , Nirmoy Das , Viresh Kumar , Daniel Vetter , Lee Jones , Sumit Semwal , Rob Herring , lima@lists.freedesktop.org, Mauro Carvalho Chehab , Masahiro Yamada , Steven Price , Luben Tuikov , Alyssa Rosenzweig , Sami Tolvanen , Russell King , Dave Airlie , =?utf-8?b?TWFyZWsgT2zFocOhaw==?= , Dennis Li , Chen Li , Paul Menzel , Kees Cook , Intel Graphics Development , Kevin Wang , etnaviv@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Christian Gmeiner , Andrey Grodzovsky , Sonny Jiang , Deepak R Varma , Tomeu Vizoso , Nick Terrell , Qiang Yu , Alex Deucher , Tian Tao , linux-media@vger.kernel.org, =?utf-8?q?C?= =?utf-8?q?hristian_K=C3=B6nig?= , Lucas Stach Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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. v5: Reshuffle the split between init/arm once more, amdgpu abuses drm_sched.ready to signal gpu reset failures. Also document this somewhat. (Christian) 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 | 69 ++++++++++++++++++++---- drivers/gpu/drm/v3d/v3d_gem.c | 2 + include/drm/gpu_scheduler.h | 7 ++- 10 files changed, 91 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 79554aa4dbb1..f7347c284886 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 33c414d55fab..454cb6164bdc 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 @@ -577,27 +578,28 @@ 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. + * + * WARNING: amdgpu abuses &drm_sched.ready to signal when the hardware + * has died, which can mean that there's no valid runqueue for a @entity. + * This function returns -ENOENT in this case (which probably should be -EIO as + * a more meanigful return value). + * * 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); + job->s_fence = drm_sched_fence_alloc(entity, owner); if (!job->s_fence) return -ENOMEM; - job->id = atomic64_inc_return(&sched->job_id_count); INIT_LIST_HEAD(&job->list); @@ -606,13 +608,58 @@ int drm_sched_job_init(struct drm_sched_job *job, EXPORT_SYMBOL(drm_sched_job_init); /** - * drm_sched_job_cleanup - clean up scheduler job resources + * 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); + + sched = entity->rq->sched; + + job->sched = sched; + job->s_priority = entity->rq - sched->sched_rq; + job->id = atomic64_inc_return(&sched->job_id_count); + + drm_sched_fence_init(job->s_fence, job->entity); +} +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);