From patchwork Fri Feb 4 10:04:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Christian_K=C3=B6nig?= X-Patchwork-Id: 539991 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C0A5C433FE for ; Fri, 4 Feb 2022 10:04:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358101AbiBDKEk (ORCPT ); Fri, 4 Feb 2022 05:04:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351114AbiBDKEj (ORCPT ); Fri, 4 Feb 2022 05:04:39 -0500 Received: from mail-ed1-x534.google.com (mail-ed1-x534.google.com [IPv6:2a00:1450:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B11AC06173D for ; Fri, 4 Feb 2022 02:04:39 -0800 (PST) Received: by mail-ed1-x534.google.com with SMTP id w20so8105686edc.1 for ; Fri, 04 Feb 2022 02:04:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=nkHC8QZFOIHT45+bm5mbkRLb4msTxzU2f5F+QSxdoAg=; b=aO5j1vpxduryKd+RGFIMJ30cU/mPsvp7GMzZS70owa2r9v428jzlHLLim5ZOiSaR4S 1jxu3wimsgT80a917+7M7LK/PiksuSe8drUzAyHPuSbAfFb2oCBm5GbNfVV3WFg18ksj lOT2STj2CV6uTuxa4GUPytFqtmhrQN5vsHlTjBsvWBTnfOoom/kjURw+rdKXdKDWDqMj fV5MuBmnGAA1ktoRysUY8+HGWJCYKeX3z7Dx8/ZkB1esdCld2lrenLqTIaFVeCT14mwJ dtZQ5wCBf0fp2k1quk8MBMVj/eidysWQIPx9tQUsA+elnVn3R0Z2bWA+A/97b7mI12gK n5vw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=nkHC8QZFOIHT45+bm5mbkRLb4msTxzU2f5F+QSxdoAg=; b=KsflVV/YqrDEhkk6WwTLgJ+9/ZuaWc1EhyJ/R4Dm33eIdoOD6LR3iU7vqU1kzi5GIS YHTpTfCUvWLHVovrZ/YFX6c8HxvI65qd06BzQQ/734iIItTzx42cI5HoEaMF4S7Yhfyl yapvQjbEinMq55u+o717i/YrUQTnlFVerWtYeAd9akukuGEQNmPcgYxKNQvb8a9j2KrR TFO4aiSlTt7qDrfYZM5iro1WccJGeBZXJa6M87G8tcn4xLY3vmxTNwv3Dh7U3thPImUD 0kB6fRqLQAQepfjEbnmpnaMmkn/0cvlMbChFY6qX8rj4Cl7qx82SqxyghxlY6ZqccvYx 0hHw== X-Gm-Message-State: AOAM530z2/pDqKIoXweMr5I+Zsf0KF6JjIt48DR7lu8Nklz6m9S7LN+f tsLHGMaX2+5oN2x3MGNgF/8= X-Google-Smtp-Source: ABdhPJxZcJbhLtg6luNVPToQ3qurqMzcy+Lv2Uyi2KzW6Ius5EGVvfWD4cLsYJJ9yMg4UmDiqQ81qQ== X-Received: by 2002:aa7:db8f:: with SMTP id u15mr2316386edt.36.1643969077869; Fri, 04 Feb 2022 02:04:37 -0800 (PST) Received: from able.fritz.box (p57b0bff8.dip0.t-ipconnect.de. [87.176.191.248]) by smtp.gmail.com with ESMTPSA id z10sm633943edl.54.2022.02.04.02.04.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Feb 2022 02:04:37 -0800 (PST) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: sumit.semwal@linaro.org, thomas.hellstrom@linux.intel.com, daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 1/6] dma-buf: consolidate dma_fence subclass checking Date: Fri, 4 Feb 2022 11:04:24 +0100 Message-Id: <20220204100429.2049-2-christian.koenig@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220204100429.2049-1-christian.koenig@amd.com> References: <20220204100429.2049-1-christian.koenig@amd.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Consolidate the wrapper functions to check for dma_fence subclasses in the dma_fence header. This makes it easier to document and also check the different requirements for fence containers in the subclasses. Signed-off-by: Christian König --- include/linux/dma-fence-array.h | 15 +------------ include/linux/dma-fence-chain.h | 3 +-- include/linux/dma-fence.h | 38 +++++++++++++++++++++++++++++++++ 3 files changed, 40 insertions(+), 16 deletions(-) diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h index 303dd712220f..fec374f69e12 100644 --- a/include/linux/dma-fence-array.h +++ b/include/linux/dma-fence-array.h @@ -45,19 +45,6 @@ struct dma_fence_array { struct irq_work work; }; -extern const struct dma_fence_ops dma_fence_array_ops; - -/** - * dma_fence_is_array - check if a fence is from the array subsclass - * @fence: fence to test - * - * Return true if it is a dma_fence_array and false otherwise. - */ -static inline bool dma_fence_is_array(struct dma_fence *fence) -{ - return fence->ops == &dma_fence_array_ops; -} - /** * to_dma_fence_array - cast a fence to a dma_fence_array * @fence: fence to cast to a dma_fence_array @@ -68,7 +55,7 @@ static inline bool dma_fence_is_array(struct dma_fence *fence) static inline struct dma_fence_array * to_dma_fence_array(struct dma_fence *fence) { - if (fence->ops != &dma_fence_array_ops) + if (!fence || !dma_fence_is_array(fence)) return NULL; return container_of(fence, struct dma_fence_array, base); diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h index 54fe3443fd2c..ee906b659694 100644 --- a/include/linux/dma-fence-chain.h +++ b/include/linux/dma-fence-chain.h @@ -49,7 +49,6 @@ struct dma_fence_chain { spinlock_t lock; }; -extern const struct dma_fence_ops dma_fence_chain_ops; /** * to_dma_fence_chain - cast a fence to a dma_fence_chain @@ -61,7 +60,7 @@ extern const struct dma_fence_ops dma_fence_chain_ops; static inline struct dma_fence_chain * to_dma_fence_chain(struct dma_fence *fence) { - if (!fence || fence->ops != &dma_fence_chain_ops) + if (!fence || !dma_fence_is_chain(fence)) return NULL; return container_of(fence, struct dma_fence_chain, base); diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h index 1ea691753bd3..775cdc0b4f24 100644 --- a/include/linux/dma-fence.h +++ b/include/linux/dma-fence.h @@ -587,4 +587,42 @@ struct dma_fence *dma_fence_get_stub(void); struct dma_fence *dma_fence_allocate_private_stub(void); u64 dma_fence_context_alloc(unsigned num); +extern const struct dma_fence_ops dma_fence_array_ops; +extern const struct dma_fence_ops dma_fence_chain_ops; + +/** + * dma_fence_is_array - check if a fence is from the array subclass + * @fence: the fence to test + * + * Return true if it is a dma_fence_array and false otherwise. + */ +static inline bool dma_fence_is_array(struct dma_fence *fence) +{ + return fence->ops == &dma_fence_array_ops; +} + +/** + * dma_fence_is_chain - check if a fence is from the chain subclass + * @fence: the fence to test + * + * Return true if it is a dma_fence_chain and false otherwise. + */ +static inline bool dma_fence_is_chain(struct dma_fence *fence) +{ + return fence->ops == &dma_fence_chain_ops; +} + +/** + * dma_fence_is_container - check if a fence is a container for other fences + * @fence: the fence to test + * + * Return true if this fence is a container for other fences, false otherwise. + * This is important since we can't build up large fence structure or otherwise + * we run into recursion during operation on those fences. + */ +static inline bool dma_fence_is_container(struct dma_fence *fence) +{ + return dma_fence_is_array(fence) || dma_fence_is_chain(fence); +} + #endif /* __LINUX_DMA_FENCE_H */