From patchwork Fri Sep 1 01:50:38 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: 43679 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 1dnb7F-0002eG-Ly; Fri, 01 Sep 2017 01:51:25 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751722AbdIABvY (ORCPT + 1 other); Thu, 31 Aug 2017 21:51:24 -0400 Received: from mail-qk0-f194.google.com ([209.85.220.194]:34461 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751721AbdIABvX (ORCPT ); Thu, 31 Aug 2017 21:51:23 -0400 Received: by mail-qk0-f194.google.com with SMTP id a77so1002345qkb.1 for ; Thu, 31 Aug 2017 18:51:23 -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=PeHt8kTGv1MJH9jini7Dc9TBiNcP2yoZ8hIk9KCut2ewUucAfwmlI7/+CiX3N5NHnz jzmGa0qVUuQpy+Q3uW/zocqRn04ZyxR/EUEpZ/XRJYEa31sbDwA9DNubSGLSml+yj+vN PGFmK/RKUDPLhvwM6CJyAZIrevlo44YMnjvh0EgjOS5Gbe4OmCYA+vBPOTNwQx0WMqVv USyiAxUziegDgaMm/DvCI50DVUvOTCwJ8ONdQP/qEZUDsL8E9bSjS3lzFoqcBh8pT7JL VdGcBkx95wOIlUpVzKTZFMPQ4LVOTWt3YTFmjWrOHrP5luzrfF8M4JKwfJgmCVELsuwj 9E2g== X-Gm-Message-State: AHPjjUh1ppFfAjVrC1VSQtV6+tGDMwhd3103vBKHsIjdu3QubKHKC99N 6vXWGeVGf7JjsRXQlA4= X-Google-Smtp-Source: ADKCNb5jWdgCOxrL13PYO9GTEyDo/BYAr0mapMr5V7ff5900gzOAEWLwct770xemj3GY0MSYzdceOg== X-Received: by 10.55.100.2 with SMTP id y2mr573924qkb.250.1504230682583; Thu, 31 Aug 2017 18:51:22 -0700 (PDT) Received: from localhost.localdomain ([187.10.21.246]) by smtp.gmail.com with ESMTPSA id o17sm6366232qkl.52.2017.08.31.18.51.20 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 31 Aug 2017 18:51:22 -0700 (PDT) From: Gustavo Padovan To: linux-media@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Shuah Khan , Javier Martinez Canillas Subject: [PATCH v2 11/14] [media] vb2: add videobuf2 dma-buf fence helpers Date: Thu, 31 Aug 2017 22:50:38 -0300 Message-Id: <20170901015041.7757-12-gustavo@padovan.org> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170901015041.7757-1-gustavo@padovan.org> References: <20170901015041.7757-1-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; +}