From patchwork Mon Mar 2 04:12:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Senozhatsky X-Patchwork-Id: 11414755 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 947F014B4 for ; Mon, 2 Mar 2020 04:13:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73EB224699 for ; Mon, 2 Mar 2020 04:13:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="dvSjq7Zw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727237AbgCBENP (ORCPT ); Sun, 1 Mar 2020 23:13:15 -0500 Received: from mail-pj1-f68.google.com ([209.85.216.68]:38428 "EHLO mail-pj1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727226AbgCBENP (ORCPT ); Sun, 1 Mar 2020 23:13:15 -0500 Received: by mail-pj1-f68.google.com with SMTP id a16so3520292pju.3 for ; Sun, 01 Mar 2020 20:13:14 -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=JCmxjKYr6h+HQkJ8I2sAt9HA3Gj5LCEzRtahfHgdo0A=; b=dvSjq7Zw/Qc5F8sFmiaMtJkkUXhJhepVHY2UABgyeaMKBuNgDzwVtU68FnJijUdrMQ WmBiIWa7qp+6yC1mTg+ZFE0LqEybSHbuC+TOmGZ83GdhiFOvOuowkiKC+eXkPH2v1zsk q8K9wZwejOY3M98hsOW8Y8SVJxtMyMRXvnokE= 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=JCmxjKYr6h+HQkJ8I2sAt9HA3Gj5LCEzRtahfHgdo0A=; b=gONer4ecTkLexRFnlFZJTMXuC3lwpRXe7Qv0A/LeQGhpw4yxUTs+4W0QUmAINKqkwh Zi+WSUiT3mpcSQCDWVeolCDsHDoypUqp34Qgea0pacmzcXiRW7jciDrIYTyFeci/sya9 IMp/unU0A9aUQtBZDJkuRtCB71sjrxP1sDYld6zKkMbVStk4MYelVzKSMgamfaAShN18 WF+aIMdccWTKeqhT8Fbm9pGvKgbqA0L8pbxptbtCj1h+WFTSqiwpVSy87MZ3VBGS4+u/ 8hGd1svFpwBp42SlxUyMwJxyKsH5D0A+oac9ilUjr6dTzvZQeLXoa+ATFy69Fh3E9Utv W31w== X-Gm-Message-State: APjAAAVfLqXZ1yJ/5VB2ZEPpq1Yqq5VjARLyhgkP8FnVrYHw2nICqTp3 +h7SzC4vOJrnI0C+9t143jDugzUIh98= X-Google-Smtp-Source: APXvYqy4WoGZXuS24GnnShv66EtDO3MG/qipYpf7F76NoK5QMZG39PHMDR+xMttQy4YKpzrD4GK2bQ== X-Received: by 2002:a17:90a:c301:: with SMTP id g1mr18799146pjt.88.1583122394164; Sun, 01 Mar 2020 20:13:14 -0800 (PST) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:5bbb:c872:f2b1:f53b]) by smtp.gmail.com with ESMTPSA id d82sm1698114pfd.187.2020.03.01.20.13.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Mar 2020 20:13:13 -0800 (PST) From: Sergey Senozhatsky To: Hans Verkuil , Tomasz Figa Cc: Mauro Carvalho Chehab , Kyungmin Park , Marek Szyprowski , Sakari Ailus , Laurent Pinchart , Pawel Osciak , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv4 09/11] videobuf2: add begin/end cpu_access callbacks to dma-contig Date: Mon, 2 Mar 2020 13:12:11 +0900 Message-Id: <20200302041213.27662-10-senozhatsky@chromium.org> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog In-Reply-To: <20200302041213.27662-1-senozhatsky@chromium.org> References: <20200302041213.27662-1-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 Provide begin_cpu_access() and end_cpu_access() callbacks for cache synchronisation on exported buffers. The patch also adds a new helper function - vb2_dc_buffer_consistent(), which returns true is if the buffer is consistent (DMA_ATTR_NON_CONSISTENT bit cleared), so then we don't need to sync anything. Signed-off-by: Sergey Senozhatsky --- .../common/videobuf2/videobuf2-dma-contig.c | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index d0c9dffe49e5..a387260fb321 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -42,6 +42,11 @@ struct vb2_dc_buf { struct dma_buf_attachment *db_attach; }; +static inline bool vb2_dc_buffer_consistent(unsigned long attr) +{ + return !(attr & DMA_ATTR_NON_CONSISTENT); +} + /*********************************************/ /* scatterlist table functions */ /*********************************************/ @@ -335,6 +340,32 @@ static void vb2_dc_dmabuf_ops_release(struct dma_buf *dbuf) vb2_dc_put(dbuf->priv); } +static int vb2_dc_dmabuf_ops_begin_cpu_access(struct dma_buf *dbuf, + enum dma_data_direction direction) +{ + struct vb2_dc_buf *buf = dbuf->priv; + struct sg_table *sgt = buf->dma_sgt; + + if (vb2_dc_buffer_consistent(buf->attrs)) + return 0; + + dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); + return 0; +} + +static int vb2_dc_dmabuf_ops_end_cpu_access(struct dma_buf *dbuf, + enum dma_data_direction direction) +{ + struct vb2_dc_buf *buf = dbuf->priv; + struct sg_table *sgt = buf->dma_sgt; + + if (vb2_dc_buffer_consistent(buf->attrs)) + return 0; + + dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); + return 0; +} + static void *vb2_dc_dmabuf_ops_vmap(struct dma_buf *dbuf) { struct vb2_dc_buf *buf = dbuf->priv; @@ -353,6 +384,8 @@ static const struct dma_buf_ops vb2_dc_dmabuf_ops = { .detach = vb2_dc_dmabuf_ops_detach, .map_dma_buf = vb2_dc_dmabuf_ops_map, .unmap_dma_buf = vb2_dc_dmabuf_ops_unmap, + .begin_cpu_access = vb2_dc_dmabuf_ops_begin_cpu_access, + .end_cpu_access = vb2_dc_dmabuf_ops_end_cpu_access, .vmap = vb2_dc_dmabuf_ops_vmap, .mmap = vb2_dc_dmabuf_ops_mmap, .release = vb2_dc_dmabuf_ops_release,