From patchwork Thu Sep 7 18:42:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo F. Padovan" X-Patchwork-Id: 43898 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dq1nK-0000aH-01; Thu, 07 Sep 2017 18:44:54 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756013AbdIGSnW (ORCPT + 1 other); Thu, 7 Sep 2017 14:43:22 -0400 Received: from mail-qt0-f195.google.com ([209.85.216.195]:34756 "EHLO mail-qt0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756009AbdIGSnU (ORCPT ); Thu, 7 Sep 2017 14:43:20 -0400 Received: by mail-qt0-f195.google.com with SMTP id q8so332901qtb.1; Thu, 07 Sep 2017 11:43:19 -0700 (PDT) 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; bh=IqqmPPjeoBAq34XqtKpFz54PW6vD3cgKNl3GuwpgNE8=; b=N/fbxZeVucMqb+NnvSeX1sy9Kl964S+NSY1GYoq0Ejm7DtwwYDzu7/Qi+Lvc1Hdhj1 JQYlrE7uz8jZM46R4AajOuMIunENNjHZFz9Wc7vroB/xVe5BAJQR5c2oTrPTaLQGPCEO g8rWJ1mlayTsMEhTW8Gwqx50v8cdnB/jF9k2HRjSZQvXwXoXoooECvbJs9I2PgUCB59n J0Uf8QZxaL7yG3FCvs3vHBLHIuCHVwOL6wmtZSX5k/+yAfXqyECe4zWwFUnbRFaxpVJW zQHLmb5uOEmvlPtJ+BwTw+VvVx2+yc60ujKilH8t6R3qOmWr2gU1XoleAjA83qMnq8j1 wnLg== X-Gm-Message-State: AHPjjUg+lZFizYSDGLY2uO2huquHmC9J+9ZiJeODOkb4mTxoqd6oJ3y1 QN7ENDtdAOEhLomxBTA= X-Google-Smtp-Source: AOwi7QDfVrADqS1HC+ZCKQk7Tks3pTXRL5pfc8yb3D2GOlUyer8sIn45k2OQ78dF2OHc6ky4Qure2g== X-Received: by 10.200.47.24 with SMTP id j24mr446365qta.147.1504809798915; Thu, 07 Sep 2017 11:43:18 -0700 (PDT) Received: from localhost.localdomain ([187.10.21.246]) by smtp.gmail.com with ESMTPSA id v30sm213216qtg.70.2017.09.07.11.43.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 07 Sep 2017 11:43:18 -0700 (PDT) From: Gustavo Padovan To: linux-media@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Shuah Khan , linux-kernel@vger.kernel.org, Javier Martinez Canillas Subject: [PATCH v3 12/15] [media] vb2: add videobuf2 dma-buf fence helpers Date: Thu, 7 Sep 2017 15:42:23 -0300 Message-Id: <20170907184226.27482-13-gustavo@padovan.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170907184226.27482-1-gustavo@padovan.org> References: <20170907184226.27482-1-gustavo@padovan.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Javier Martinez Canillas Add a videobuf2-fence.h header file that contains different helpers for DMA buffer sharing explicit fence support in videobuf2. Signed-off-by: Javier Martinez Canillas Signed-off-by: Gustavo Padovan --- include/media/videobuf2-fence.h | 49 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 include/media/videobuf2-fence.h diff --git a/include/media/videobuf2-fence.h b/include/media/videobuf2-fence.h new file mode 100644 index 000000000000..ed5612ca03d6 --- /dev/null +++ b/include/media/videobuf2-fence.h @@ -0,0 +1,49 @@ +/* + * videobuf2-fence.h - DMA buffer sharing fence helpers for videobuf 2 + * + * Copyright (C) 2016 Samsung Electronics + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + */ + +#include +#include + +static DEFINE_SPINLOCK(vb2_fence_lock); + +static inline const char *vb2_fence_get_driver_name(struct dma_fence *fence) +{ + return "vb2_fence"; +} + +static inline const char *vb2_fence_get_timeline_name(struct dma_fence *fence) +{ + return "vb2_fence_timeline"; +} + +static inline bool vb2_fence_enable_signaling(struct dma_fence *fence) +{ + return true; +} + +static const struct dma_fence_ops vb2_fence_ops = { + .get_driver_name = vb2_fence_get_driver_name, + .get_timeline_name = vb2_fence_get_timeline_name, + .enable_signaling = vb2_fence_enable_signaling, + .wait = dma_fence_default_wait, +}; + +static inline struct dma_fence *vb2_fence_alloc(void) +{ + struct dma_fence *vb2_fence = kzalloc(sizeof(*vb2_fence), GFP_KERNEL); + + if (!vb2_fence) + return NULL; + + dma_fence_init(vb2_fence, &vb2_fence_ops, &vb2_fence_lock, + dma_fence_context_alloc(1), 1); + + return vb2_fence; +}