From patchwork Wed Mar 11 03:43:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jason Ekstrand X-Patchwork-Id: 11430613 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1386692A for ; Wed, 11 Mar 2020 03:44:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD6E221D56 for ; Wed, 11 Mar 2020 03:44:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=jlekstrand-net.20150623.gappssmtp.com header.i=@jlekstrand-net.20150623.gappssmtp.com header.b="tCu4TDgu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728103AbgCKDoM (ORCPT ); Tue, 10 Mar 2020 23:44:12 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:42372 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727659AbgCKDoJ (ORCPT ); Tue, 10 Mar 2020 23:44:09 -0400 Received: by mail-pf1-f194.google.com with SMTP id x2so124820pfn.9 for ; Tue, 10 Mar 2020 20:44:07 -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=P16W7ep8HpZEZbf2VCVYHJ7H+KUUPSbN1YkIr+6sSlQ=; b=tCu4TDguooR4tfYyACvCoI7MEVLwPSOiIShWk5/IPARU5TQg0GCHpx5pvxZfZ/2jdb vz0gO9H8hR1jEQgMkpKTiBJoiS7EtJ5+Re21/zT/7+dEqFcH4QhtEq7iklHDQz8aZ4ED h5o+fe9jj8aLNJTdEiFpmQESnjguXQE+DxAy48m+ri2NqUj0ck/EJ53Od44WbappO0u6 M5PMHUWsJ1AUzq32iKUreC8B7vS4OMjdorltjcDguKGnPO99on/KtQaiHpEBS1en5UC6 brO2nCR/2wZiFp6/kxIWfN0gQg4kxueOlrX2kwHyBurpODi7jr2aWxqMP0R/7BccEPV3 ysWg== 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=P16W7ep8HpZEZbf2VCVYHJ7H+KUUPSbN1YkIr+6sSlQ=; b=fQGEK1DyMFHvI0uoOXT/PrqQtwjbpkj6nQVwWAfMGxyt7kbC3S/kN14YgdLRuejcsT zbCrLnmeTSMMQHU5BFSM6bSECCHlPFca0R2Zp8dx+VVb324/jcrpsET3qg8bk7xZO6Fy wtx1WXK81OjeNQfHx2TIbdVm7aA7gxRBZa5QeEt1EKMv2f7xhv4U+PZMNLh0+birMqpY v8n04oKBaKVo3+1L2C681gwsw8REzQ2PvhFh7nYqHQVX/1ydtTR30+X8j5bTN9uAY+Zj jFOCwAtz3hXeiqDlmR8ivHWWWeJ+1l85PGIqFEmdr0aN9scwnOZy5cnquuTxSHPhEQvZ cTJQ== X-Gm-Message-State: ANhLgQ2aP7mr9ULGe5uZpLyY0aJbqhxJgRniqNeSRGubz+3CKAj/VbRW 7zlRo5deWOZ+RdPi490Dv9dbAQ== X-Google-Smtp-Source: ADFU+vuNjXuDPqhg8zCHX7akIbl+E1cdU/rjV0v8i4t9fu91z6NCzwwYTmCz8DLIFQqRHKFy7riJrw== X-Received: by 2002:a63:7e1a:: with SMTP id z26mr900050pgc.226.1583898247079; Tue, 10 Mar 2020 20:44:07 -0700 (PDT) Received: from omlet.com ([2605:6000:1026:c273::ce4]) by smtp.gmail.com with ESMTPSA id bb13sm3650846pjb.43.2020.03.10.20.44.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 20:44:06 -0700 (PDT) From: Jason Ekstrand Cc: airlied@redhat.com, christian.koenig@amd.com, jessehall@google.com, jajones@nvidia.com, daniels@collabora.com, hoegsberg@google.com, daniel.vetter@ffwll.ch, bas@basnieuwenhuizen.nl, =?utf-8?q?Christian_K?= =?utf-8?q?=C3=B6nig?= , Jason Ekstrand , Sumit Semwal , Gustavo Padovan , Kate Stewart , Richard Fontana , Allison Randal , Thomas Gleixner , Greg Hackmann , Chenbo Feng , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] dma-buf: add dma_fence_array_for_each (v2) Date: Tue, 10 Mar 2020 22:43:46 -0500 Message-Id: <20200311034351.1275197-1-jason@jlekstrand.net> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200303190318.522103-1-jason@jlekstrand.net> References: <20200303190318.522103-1-jason@jlekstrand.net> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 d3fbd950be94..2ac1afc697d0 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 303dd712220f..588ac8089dd6 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 */