From patchwork Tue Mar 16 04:53:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jason Ekstrand X-Patchwork-Id: 12141245 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 776E5C433E0 for ; Tue, 16 Mar 2021 05:00:49 +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 D8DB7650BB for ; Tue, 16 Mar 2021 05:00:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D8DB7650BB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=jlekstrand.net 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 4F3B489C8D; Tue, 16 Mar 2021 05:00:48 +0000 (UTC) Received: from mail-oi1-x22f.google.com (mail-oi1-x22f.google.com [IPv6:2607:f8b0:4864:20::22f]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9FA7C89C8D for ; Tue, 16 Mar 2021 05:00:46 +0000 (UTC) Received: by mail-oi1-x22f.google.com with SMTP id d20so36884178oiw.10 for ; Mon, 15 Mar 2021 22:00:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jlekstrand-net.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Wcain8isGpID5TiDS3p2A/N5+StUg6lfh0Vw4Kh3Acs=; b=V7TndwpQhu+oiUPhkn0Az9On9YRq3u1BtO+zfx+aRFBBV8KyGKuib0eBcYRDvBs+fL COtzlufkp9SXSfq2DQ+IcesezUhNBly0PM4skxsH3S/xl8/La5XzWlZOrWLsxno3+bAV D0Ykj7QqTNTfN6ByUkfgKkbvD/IhR7jpMBUY8v/mgCCzqOAzE9ktQOugaCWXLMLgPAcT Jsi7Bsc31niKZnjDg5OL4+LtgF2n7ENwcmQhQe7kHSZHSx+tPEsoK4NvDGobTANsS7Ff L5GnyVf+m1zX7smeT5PDJJxD9TUTzhGN8pKe9MJsLLmG5K/u5+xLZLB1uKNAiHCODRx9 lfAA== 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=Wcain8isGpID5TiDS3p2A/N5+StUg6lfh0Vw4Kh3Acs=; b=MhirwkjhF+7Rv4KkRMmM9ZC6aj+ZPxjbkLof1gmlP+C5XMds6N24zpoQ67mxxc95x2 76wDPLN98zryY/ckOmiAzY8zGwt1Z7yIPCDDcaiTRm92A8wDeHZGGVc3SGpw+rSUoVYw 1quPfiOm/k/FZx9lbVcV4Rh2ePaFtNhHqGVyKa5DH79NOxnIStG5YjVoTIGcGuNr6z9v YlE167uovGuawAobIHDAVpCMXFZ9FdNc0JCJmztB4q1Aw3txxsM2XOqUoYe+Qmh/6UdC mijIAk0z9qg46UY6YkzycYdAJ0gXT/k4zWIs1OUBigo/bfExgc0B3zhcn5fZgopxmHnt BM8g== X-Gm-Message-State: AOAM531msV6WbKnpl7n/PeXz/OAYvwdl4bwlrQtK8dTtjfGbPXxu2Z4D iHt3nsHa8jBYGSCrXYOxHxHjpzon6evsdg== X-Google-Smtp-Source: ABdhPJyzSSb9XXLuLbFJQFF44nOWoa2E8vzSjK7UwQDKfK6Q6JbS/iQ+lo85eRTbt0+GaNq5SFv60g== X-Received: by 2002:a17:90a:c909:: with SMTP id v9mr2911617pjt.218.1615870409888; Mon, 15 Mar 2021 21:53:29 -0700 (PDT) Received: from omlet.com (jfdmzpr04-ext.jf.intel.com. [134.134.137.73]) by smtp.gmail.com with ESMTPSA id w128sm15147785pfw.86.2021.03.15.21.53.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Mar 2021 21:53:29 -0700 (PDT) From: Jason Ekstrand To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/3] dma-buf: add dma_fence_array_for_each (v2) Date: Mon, 15 Mar 2021 23:53:20 -0500 Message-Id: <20210316045322.2020294-2-jason@jlekstrand.net> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210316045322.2020294-1-jason@jlekstrand.net> References: <20210315210453.1667925-1-jason@jlekstrand.net> <20210316045322.2020294-1-jason@jlekstrand.net> MIME-Version: 1.0 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: =?utf-8?q?Christian_K=C3=B6nig?= , Jason Ekstrand Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Christian König Add a helper to iterate over all fences in a dma_fence_array object. v2 (Jason Ekstrand) - Return NULL from dma_fence_array_first if head == NULL. This matches the iterator behavior of dma_fence_chain_for_each in that it iterates zero times if head == NULL. - Return NULL from dma_fence_array_next if index > array->num_fences. Signed-off-by: Jason Ekstrand --- drivers/dma-buf/dma-fence-array.c | 27 +++++++++++++++++++++++++++ include/linux/dma-fence-array.h | 17 +++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/drivers/dma-buf/dma-fence-array.c b/drivers/dma-buf/dma-fence-array.c index d3fbd950be944..2ac1afc697d0f 100644 --- a/drivers/dma-buf/dma-fence-array.c +++ b/drivers/dma-buf/dma-fence-array.c @@ -201,3 +201,30 @@ bool dma_fence_match_context(struct dma_fence *fence, u64 context) return true; } EXPORT_SYMBOL(dma_fence_match_context); + +struct dma_fence *dma_fence_array_first(struct dma_fence *head) +{ + struct dma_fence_array *array; + + if (!head) + return NULL; + + array = to_dma_fence_array(head); + if (!array) + return head; + + return array->fences[0]; +} +EXPORT_SYMBOL(dma_fence_array_first); + +struct dma_fence *dma_fence_array_next(struct dma_fence *head, + unsigned int index) +{ + struct dma_fence_array *array = to_dma_fence_array(head); + + if (!array || index >= array->num_fences) + return NULL; + + return array->fences[index]; +} +EXPORT_SYMBOL(dma_fence_array_next); diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h index 303dd712220fd..588ac8089dd61 100644 --- a/include/linux/dma-fence-array.h +++ b/include/linux/dma-fence-array.h @@ -74,6 +74,19 @@ to_dma_fence_array(struct dma_fence *fence) return container_of(fence, struct dma_fence_array, base); } +/** + * dma_fence_array_for_each - iterate over all fences in array + * @fence: current fence + * @index: index into the array + * @head: potential dma_fence_array object + * + * Test if @array is a dma_fence_array object and if yes iterate over all fences + * in the array. If not just iterate over the fence in @array itself. + */ +#define dma_fence_array_for_each(fence, index, head) \ + for (index = 0, fence = dma_fence_array_first(head); fence; \ + ++(index), fence = dma_fence_array_next(head, index)) + struct dma_fence_array *dma_fence_array_create(int num_fences, struct dma_fence **fences, u64 context, unsigned seqno, @@ -81,4 +94,8 @@ struct dma_fence_array *dma_fence_array_create(int num_fences, bool dma_fence_match_context(struct dma_fence *fence, u64 context); +struct dma_fence *dma_fence_array_first(struct dma_fence *head); +struct dma_fence *dma_fence_array_next(struct dma_fence *head, + unsigned int index); + #endif /* __LINUX_DMA_FENCE_ARRAY_H */