From patchwork Tue Sep 8 10:33:51 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 7139891 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 24C1B9F32B for ; Tue, 8 Sep 2015 10:36:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4CA4D205FD for ; Tue, 8 Sep 2015 10:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 59ABD20727 for ; Tue, 8 Sep 2015 10:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754510AbbIHKgH (ORCPT ); Tue, 8 Sep 2015 06:36:07 -0400 Received: from mga11.intel.com ([192.55.52.93]:53611 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754415AbbIHKf4 (ORCPT ); Tue, 8 Sep 2015 06:35:56 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 08 Sep 2015 03:35:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,489,1437462000"; d="scan'208";a="800535630" Received: from paasikivi.fi.intel.com ([10.237.72.42]) by fmsmga002.fm.intel.com with ESMTP; 08 Sep 2015 03:35:55 -0700 Received: from nauris.fi.intel.com (nauris.localdomain [192.168.240.2]) by paasikivi.fi.intel.com (Postfix) with ESMTP id B838720EA1; Tue, 8 Sep 2015 13:35:51 +0300 (EEST) Received: by nauris.fi.intel.com (Postfix, from userid 1000) id 08217201EE; Tue, 8 Sep 2015 13:34:16 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: pawel@osciak.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, hverkuil@xs4all.nl Subject: [RFC 07/11] vb2: dma-contig: Remove redundant sgt_base field Date: Tue, 8 Sep 2015 13:33:51 +0300 Message-Id: <1441708435-12736-8-git-send-email-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.1.0.231.g7484e3b In-Reply-To: <1441708435-12736-1-git-send-email-sakari.ailus@linux.intel.com> References: <1441708435-12736-1-git-send-email-sakari.ailus@linux.intel.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The struct vb2_dc_buf contains two struct sg_table fields: sgt_base and dma_sgt. The former is used by DMA-BUF buffers whereas the latter is used by USERPTR. Unify the two, leaving dma_sgt. MMAP buffers do not need cache flushing since they have been allocated using dma_alloc_coherent(). Signed-off-by: Sakari Ailus --- drivers/media/v4l2-core/videobuf2-dma-contig.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c index 94c1e64..26a0a0f 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c @@ -36,7 +36,6 @@ struct vb2_dc_buf { /* MMAP related */ struct vb2_vmarea_handler handler; atomic_t refcount; - struct sg_table *sgt_base; /* USERPTR related */ struct vm_area_struct *vma; @@ -117,7 +116,7 @@ static void vb2_dc_prepare(void *buf_priv) struct sg_table *sgt = buf->dma_sgt; /* DMABUF exporter will flush the cache for us */ - if (!sgt || buf->db_attach) + if (!buf->vma) return; dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); @@ -129,7 +128,7 @@ static void vb2_dc_finish(void *buf_priv) struct sg_table *sgt = buf->dma_sgt; /* DMABUF exporter will flush the cache for us */ - if (!sgt || buf->db_attach) + if (!buf->vma) return; dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); @@ -146,9 +145,9 @@ static void vb2_dc_put(void *buf_priv) if (!atomic_dec_and_test(&buf->refcount)) return; - if (buf->sgt_base) { - sg_free_table(buf->sgt_base); - kfree(buf->sgt_base); + if (buf->dma_sgt) { + sg_free_table(buf->dma_sgt); + kfree(buf->dma_sgt); } dma_free_coherent(buf->dev, buf->size, buf->vaddr, buf->dma_addr); put_device(buf->dev); @@ -252,13 +251,13 @@ static int vb2_dc_dmabuf_ops_attach(struct dma_buf *dbuf, struct device *dev, /* Copy the buf->base_sgt scatter list to the attachment, as we can't * map the same scatter list to multiple attachments at the same time. */ - ret = sg_alloc_table(sgt, buf->sgt_base->orig_nents, GFP_KERNEL); + ret = sg_alloc_table(sgt, buf->dma_sgt->orig_nents, GFP_KERNEL); if (ret) { kfree(attach); return -ENOMEM; } - rd = buf->sgt_base->sgl; + rd = buf->dma_sgt->sgl; wr = sgt->sgl; for (i = 0; i < sgt->orig_nents; ++i) { sg_set_page(wr, sg_page(rd), rd->length, rd->offset); @@ -409,10 +408,10 @@ static struct dma_buf *vb2_dc_get_dmabuf(void *buf_priv, unsigned long flags) exp_info.flags = flags; exp_info.priv = buf; - if (!buf->sgt_base) - buf->sgt_base = vb2_dc_get_base_sgt(buf); + if (!buf->dma_sgt) + buf->dma_sgt = vb2_dc_get_base_sgt(buf); - if (WARN_ON(!buf->sgt_base)) + if (WARN_ON(!buf->dma_sgt)) return NULL; dbuf = dma_buf_export(&exp_info);