From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 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 57D8BC07E96 for ; Thu, 8 Jul 2021 17:38:16 +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 2232961920 for ; Thu, 8 Jul 2021 17:38:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2232961920 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C1C456E946; Thu, 8 Jul 2021 17:38:10 +0000 (UTC) Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3D7036E947 for ; Thu, 8 Jul 2021 17:38:08 +0000 (UTC) Received: by mail-wr1-x436.google.com with SMTP id a13so8504380wrf.10 for ; Thu, 08 Jul 2021 10:38:08 -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=aF+7eqin7S19iz1UaMS7J3yDc/1YnzVl0I5fw9EWIlI=; b=bO/n1Zkb675oqo0/mqmxMsZGEJK5fHx8vO2Qdp6XWQ13sNT986eieB+8HgrxFISvmn w1Rg2Av3kA57wfsywQwdtHolMQMPVlv13pjJaqC/naOXaX43wj/vMN5FQNr36btAD5CL OdZWTJTB2cD03BzImT/2/TGvok0NVl7zi+XOg= 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=aF+7eqin7S19iz1UaMS7J3yDc/1YnzVl0I5fw9EWIlI=; b=M1Sce7sZ9yQ+cW5xGad/S6oTqv0NAmi7mJQr5u0+75liHTVg/Oyenude2EkPD4IswP DthayY5AfO71kqXX/NCHpEsXIldxh590UTfZ2rZpTlFfgDxh3cknxpxFl8ZZ8xa8MZBm gBsdOQYYWTIy9Hwu07JVLTlnbbZNQGfkCp44UA5PKQZx8vG/cL86fY6GFIN70UwF+aF5 LecJmgoDvmwMPelHsj8EHidCWuIhyagwBjhBJf/NWqRJnhU8Liw73T8pfPT2Up69C+4U UdDXoay485fK2ovSh6xqRByvk+YcCs1+5nw18mooRGdZSXg9hxWniZbAliVFruTCtHKY cNMg== X-Gm-Message-State: AOAM531xF7kOyYq1IhqajkSJw5KcHq292UlgJUJRiEmMx6X62p4NYeaj RPKENnDzqWLsq8b4ZPv/GOL+6AQCaiVWXg== X-Google-Smtp-Source: ABdhPJwb5BeLFRcg8K4BNw7pXlR3MfrHpXzNoWjZEF/8JFh241KqjnY9I8YmGDoEPgePmuWZETl0ew== X-Received: by 2002:a5d:6ac4:: with SMTP id u4mr17670499wrw.166.1625765886972; Thu, 08 Jul 2021 10:38:06 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id l4sm2521853wme.26.2021.07.08.10.38.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 10:38:06 -0700 (PDT) From: Daniel Vetter To: DRI Development Subject: [PATCH v3 01/20] drm/sched: entity->rq selection cannot fail Date: Thu, 8 Jul 2021 19:37:35 +0200 Message-Id: <20210708173754.3877540-2-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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jack Zhang , Daniel Vetter , Intel Graphics Development , Steven Price , Luben Tuikov , Boris Brezillon , Daniel Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" If it does, someone managed to set up a sched_entity without schedulers, which is just a driver bug. We BUG_ON() here because in the next patch drm_sched_job_init() will be split up, with drm_sched_job_arm() never failing. And that's the part where the rq selection will end up in. Note that if having an empty sched_list set on an entity is indeed a valid use-case, we can keep that check in job_init even after the split into job_init/arm. Signed-off-by: Daniel Vetter Cc: "Christian König" Cc: Luben Tuikov Cc: Daniel Vetter Cc: Steven Price Cc: Andrey Grodzovsky Cc: Boris Brezillon Cc: Jack Zhang --- drivers/gpu/drm/scheduler/sched_entity.c | 2 +- drivers/gpu/drm/scheduler/sched_main.c | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index 79554aa4dbb1..6fc116ee7302 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -45,7 +45,7 @@ * @guilty: atomic_t set to 1 when a job on this queue * is found to be guilty causing a timeout * - * Note: the sched_list should have at least one element to schedule + * Note: the sched_list must have at least one element to schedule * the entity * * Returns 0 on success or a negative error code on failure. diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 33c414d55fab..01dd47154181 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -586,8 +586,7 @@ int drm_sched_job_init(struct drm_sched_job *job, struct drm_gpu_scheduler *sched; drm_sched_entity_select_rq(entity); - if (!entity->rq) - return -ENOENT; + BUG_ON(!entity->rq); sched = entity->rq->sched; -- 2.32.0 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 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 B1296C07E9E for ; Thu, 8 Jul 2021 17:38:20 +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 84DB561879 for ; Thu, 8 Jul 2021 17:38:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84DB561879 Authentication-Results: mail.kernel.org; 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Thu, 08 Jul 2021 10:38:06 -0700 (PDT) From: Daniel Vetter To: DRI Development Date: Thu, 8 Jul 2021 19:37:35 +0200 Message-Id: <20210708173754.3877540-2-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 Subject: [Intel-gfx] [PATCH v3 01/20] drm/sched: entity->rq selection cannot fail 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: Andrey Grodzovsky , Jack Zhang , Daniel Vetter , Intel Graphics Development , Steven Price , Luben Tuikov , Daniel Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" SWYgaXQgZG9lcywgc29tZW9uZSBtYW5hZ2VkIHRvIHNldCB1cCBhIHNjaGVkX2VudGl0eSB3aXRo b3V0CnNjaGVkdWxlcnMsIHdoaWNoIGlzIGp1c3QgYSBkcml2ZXIgYnVnLgoKV2UgQlVHX09OKCkg aGVyZSBiZWNhdXNlIGluIHRoZSBuZXh0IHBhdGNoIGRybV9zY2hlZF9qb2JfaW5pdCgpIHdpbGwK YmUgc3BsaXQgdXAsIHdpdGggZHJtX3NjaGVkX2pvYl9hcm0oKSBuZXZlciBmYWlsaW5nLiBBbmQg dGhhdCdzIHRoZQpwYXJ0IHdoZXJlIHRoZSBycSBzZWxlY3Rpb24gd2lsbCBlbmQgdXAgaW4uCgpO b3RlIHRoYXQgaWYgaGF2aW5nIGFuIGVtcHR5IHNjaGVkX2xpc3Qgc2V0IG9uIGFuIGVudGl0eSBp cyBpbmRlZWQgYQp2YWxpZCB1c2UtY2FzZSwgd2UgY2FuIGtlZXAgdGhhdCBjaGVjayBpbiBqb2Jf aW5pdCBldmVuIGFmdGVyIHRoZSBzcGxpdAppbnRvIGpvYl9pbml0L2FybS4KClNpZ25lZC1vZmYt Ynk6IERhbmllbCBWZXR0ZXIgPGRhbmllbC52ZXR0ZXJAaW50ZWwuY29tPgpDYzogIkNocmlzdGlh biBLw7ZuaWciIDxjaHJpc3RpYW4ua29lbmlnQGFtZC5jb20+CkNjOiBMdWJlbiBUdWlrb3YgPGx1 YmVuLnR1aWtvdkBhbWQuY29tPgpDYzogRGFuaWVsIFZldHRlciA8ZGFuaWVsLnZldHRlckBmZnds bC5jaD4KQ2M6IFN0ZXZlbiBQcmljZSA8c3RldmVuLnByaWNlQGFybS5jb20+CkNjOiBBbmRyZXkg R3JvZHpvdnNreSA8YW5kcmV5Lmdyb2R6b3Zza3lAYW1kLmNvbT4KQ2M6IEJvcmlzIEJyZXppbGxv biA8Ym9yaXMuYnJlemlsbG9uQGNvbGxhYm9yYS5jb20+CkNjOiBKYWNrIFpoYW5nIDxKYWNrLlpo YW5nMUBhbWQuY29tPgotLS0KIGRyaXZlcnMvZ3B1L2RybS9zY2hlZHVsZXIvc2NoZWRfZW50aXR5 LmMgfCAyICstCiBkcml2ZXJzL2dwdS9kcm0vc2NoZWR1bGVyL3NjaGVkX21haW4uYyAgIHwgMyAr LS0KIDIgZmlsZXMgY2hhbmdlZCwgMiBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQoKZGlm ZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9zY2hlZHVsZXIvc2NoZWRfZW50aXR5LmMgYi9kcml2 ZXJzL2dwdS9kcm0vc2NoZWR1bGVyL3NjaGVkX2VudGl0eS5jCmluZGV4IDc5NTU0YWE0ZGJiMS4u NmZjMTE2ZWU3MzAyIDEwMDY0NAotLS0gYS9kcml2ZXJzL2dwdS9kcm0vc2NoZWR1bGVyL3NjaGVk X2VudGl0eS5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9zY2hlZHVsZXIvc2NoZWRfZW50aXR5LmMK QEAgLTQ1LDcgKzQ1LDcgQEAKICAqIEBndWlsdHk6IGF0b21pY190IHNldCB0byAxIHdoZW4gYSBq b2Igb24gdGhpcyBxdWV1ZQogICogICAgICAgICAgaXMgZm91bmQgdG8gYmUgZ3VpbHR5IGNhdXNp bmcgYSB0aW1lb3V0CiAgKgotICogTm90ZTogdGhlIHNjaGVkX2xpc3Qgc2hvdWxkIGhhdmUgYXQg bGVhc3Qgb25lIGVsZW1lbnQgdG8gc2NoZWR1bGUKKyAqIE5vdGU6IHRoZSBzY2hlZF9saXN0IG11 c3QgaGF2ZSBhdCBsZWFzdCBvbmUgZWxlbWVudCB0byBzY2hlZHVsZQogICogICAgICAgdGhlIGVu dGl0eQogICoKICAqIFJldHVybnMgMCBvbiBzdWNjZXNzIG9yIGEgbmVnYXRpdmUgZXJyb3IgY29k ZSBvbiBmYWlsdXJlLgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL3NjaGVkdWxlci9zY2hl ZF9tYWluLmMgYi9kcml2ZXJzL2dwdS9kcm0vc2NoZWR1bGVyL3NjaGVkX21haW4uYwppbmRleCAz M2M0MTRkNTVmYWIuLjAxZGQ0NzE1NDE4MSAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL3Nj aGVkdWxlci9zY2hlZF9tYWluLmMKKysrIGIvZHJpdmVycy9ncHUvZHJtL3NjaGVkdWxlci9zY2hl ZF9tYWluLmMKQEAgLTU4Niw4ICs1ODYsNyBAQCBpbnQgZHJtX3NjaGVkX2pvYl9pbml0KHN0cnVj dCBkcm1fc2NoZWRfam9iICpqb2IsCiAJc3RydWN0IGRybV9ncHVfc2NoZWR1bGVyICpzY2hlZDsK IAogCWRybV9zY2hlZF9lbnRpdHlfc2VsZWN0X3JxKGVudGl0eSk7Ci0JaWYgKCFlbnRpdHktPnJx KQotCQlyZXR1cm4gLUVOT0VOVDsKKwlCVUdfT04oIWVudGl0eS0+cnEpOwogCiAJc2NoZWQgPSBl bnRpdHktPnJxLT5zY2hlZDsKIAotLSAKMi4zMi4wCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBs aXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1h bi9saXN0aW5mby9pbnRlbC1nZngK