From patchwork Tue Dec 17 03:20:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Senozhatsky X-Patchwork-Id: 60840 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1ih3Qa-000aBs-Dw; Tue, 17 Dec 2019 03:21:40 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727338AbfLQDU4 (ORCPT + 1 other); Mon, 16 Dec 2019 22:20:56 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:38141 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727327AbfLQDUz (ORCPT ); Mon, 16 Dec 2019 22:20:55 -0500 Received: by mail-pl1-f196.google.com with SMTP id f20so3641135plj.5 for ; Mon, 16 Dec 2019 19:20:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZqrDhJWgamLEnJ0f+brWH5beGZW3pxf2EqtCOMwdJgg=; b=ciRLBiY63+o+8cMoR1Kw48sNUnjhyOCQZtFN2AexGo3e5cIwHq1miF7ZBa7MvDakPj /XjXlF1uV+68e45tDtV3jKx4Mo7VbE05xzqMQ+dyNh64lG84W/oJE6YZRej99Sv8KTzb KOIl/O69xGS4G0jgY7L+2CUeit4CwKF9N3QYM= 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=ZqrDhJWgamLEnJ0f+brWH5beGZW3pxf2EqtCOMwdJgg=; b=AtC2sx9K2QdmgRyoOV6GXreN/s7TDunSApA7arrepGyNK7MZCOq5B0kIO3EvZ0EXyD +uu0BCfpxnLvAgzCCP6/BZWxQ2a9pJ0GeMs6G1iS1zMVdfgL/tu9NmPAn8bOxWWDk1p4 iWo+6L2+2hOcwHrlFjjWl1w8as2s2aj/Qk93Mmu9wLf5LRUFWvi7UTGTbeSQ+PEA64oD Je455zGXDLNNlEkM0fZaacQLqfB3TNGI33k1mSrh+0FpEbzKGIxMQ8LykYvPoG2wPi/O xHclt/IpCXGjV8bDJfALTcKKR5L5IXLaBR1scd2fM3UUIsSfDud1rXVhbLtC+OMbjCiz fozg== X-Gm-Message-State: APjAAAW2hJYuRXq4k+CNKqra57QtpVnzw4Wq6DhBymlJidh1GtaFyy+J DB4NIUQGBnToar5V6awJzVDL6A== X-Google-Smtp-Source: APXvYqw5ABjXI02YnEoGwgEOZOpJzyu7CZRg0ZYyfTMRaQSNW88K9oAZ4u+zuKSnSQ3smW8TIFh0rQ== X-Received: by 2002:a17:90a:2710:: with SMTP id o16mr3311690pje.110.1576552854487; Mon, 16 Dec 2019 19:20:54 -0800 (PST) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:250d:e71d:5a0a:9afe]) by smtp.gmail.com with ESMTPSA id j3sm24387455pfi.8.2019.12.16.19.20.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Dec 2019 19:20:54 -0800 (PST) From: Sergey Senozhatsky To: Hans Verkuil , Tomasz Figa , Mauro Carvalho Chehab , Kyungmin Park , Marek Szyprowski Cc: Sakari Ailus , Laurent Pinchart , Pawel Osciak , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [RFC][PATCH 03/15] videobuf2: add V4L2_FLAG_MEMORY_NON_CONSISTENT flag Date: Tue, 17 Dec 2019 12:20:22 +0900 Message-Id: <20191217032034.54897-4-senozhatsky@chromium.org> X-Mailer: git-send-email 2.24.1.735.g03f4e72817-goog In-Reply-To: <20191217032034.54897-1-senozhatsky@chromium.org> References: <20191217032034.54897-1-senozhatsky@chromium.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org By setting or clearing V4L2_FLAG_MEMORY_NON_CONSISTENT flag user-space should be able to set or clear queue's NON_CONSISTENT ->dma_attrs. Queue's ->dma_attrs are passed to the underlying allocator in __vb2_buf_mem_alloc(), so user-space will be able to request consistent or non-consistent memory allocations. Signed-off-by: Sergey Senozhatsky --- Documentation/media/uapi/v4l/buffer.rst | 19 +++++++++++++++++++ include/uapi/linux/videodev2.h | 2 ++ 2 files changed, 21 insertions(+) diff --git a/Documentation/media/uapi/v4l/buffer.rst b/Documentation/media/uapi/v4l/buffer.rst index 9149b57728e5..b08b5609f5f3 100644 --- a/Documentation/media/uapi/v4l/buffer.rst +++ b/Documentation/media/uapi/v4l/buffer.rst @@ -705,6 +705,25 @@ Buffer Flags .. c:type:: v4l2_memory +Memory Consistency Flags +======================== + +.. tabularcolumns:: |p{7.0cm}|p{2.2cm}|p{8.3cm}| + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * .. _`V4L2_FLAG_MEMORY_NON_CONSISTENT`: + + - ``V4L2_FLAG_MEMORY_NON_CONSISTENT`` + - 0x00000001 + - Set DMA_ATTR_NON_CONSISTENT queue memory consistency bit, + so all queue buffers may be allocated in non-consistent memory. + enum v4l2_memory ================ diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 04481c717fee..d352997f2b62 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -189,6 +189,8 @@ enum v4l2_memory { V4L2_MEMORY_DMABUF = 4, }; +#define V4L2_FLAG_MEMORY_NON_CONSISTENT (1 << 0) + /* see also http://vektor.theorem.ca/graphics/ycbcr/ */ enum v4l2_colorspace { /*