From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1F08C433F5 for ; Sat, 13 Nov 2021 06:22:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D188360FE7 for ; Sat, 13 Nov 2021 06:22:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D188360FE7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=U/oG9RFsnVToMPHt5UF2p5MUGjdIppB3adJIYnEl2W0=; b=bDako/mIudH2+r YeKSFKVRxRwYMEZRDr07P6oOiWZcvnM4uQHyovY78j2tYu5zjSccW++FyebU/taCPOXyVbSnG85T7 Sbc5T0Y83VoAEmVuUoWw4vwCSxn5evclBGeBxuzreQ5MmXyvuSE785O2X8FVhll7W8Gg2tGEm7+Lh c0lJ1xlgGO2PjrXJxoAVunl+4hvQlu4doekefp16TFB5i6X0iCD8CcZCHZtdNRDR82dV5cGju3Fit hj1Y+KrLVwZ7lJgeqQH9P6Y4sOlBfCRM83kVcs2P6HE6vzzCawgOXSjyF6SN/C+DBquJ+dYiFaClt /UUpXXyG5AsSQfgw+r/A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mlmQu-00CEwC-3U; Sat, 13 Nov 2021 06:22:36 +0000 Received: from lucky1.263xmail.com ([211.157.147.135]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mlmQr-00CEv8-QY for linux-rockchip@lists.infradead.org; Sat, 13 Nov 2021 06:22:35 +0000 Received: from localhost (unknown [192.168.167.130]) by lucky1.263xmail.com (Postfix) with ESMTP id C7C38B3BB5; Sat, 13 Nov 2021 14:22:24 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P7913T140599548167936S1636784543589160_; Sat, 13 Nov 2021 14:22:24 +0800 (CST) X-IP-DOMAINF: 1 X-RL-SENDER: jay.xu@rock-chips.com X-SENDER: xjq@rock-chips.com X-LOGIN-NAME: jay.xu@rock-chips.com X-FST-TO: sumit.semwal@linaro.org X-RCPT-COUNT: 11 X-LOCAL-RCPT-COUNT: 1 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-UNIQUE-TAG: X-System-Flag: 0 From: Jianqun Xu To: sumit.semwal@linaro.org, christian.koenig@amd.com Cc: pekka.paalanen@collabora.com, daniel.vetter@ffwll.ch, jason@jlekstrand.net, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Jianqun Xu Subject: [PATCH] dma-buf: add DMA_BUF_IOCTL_SYNC_PARTIAL support Date: Sat, 13 Nov 2021 14:22:22 +0800 Message-Id: <20211113062222.3743909-1-jay.xu@rock-chips.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211112_222234_119231_782804D2 X-CRM114-Status: GOOD ( 11.56 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Add DMA_BUF_IOCTL_SYNC_PARTIAL support for user to sync dma-buf with offset and len. Change-Id: I03d2d2e10e48d32aa83c31abade57e0931e1be49 Signed-off-by: Jianqun Xu --- drivers/dma-buf/dma-buf.c | 42 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/dma-buf.h | 8 +++++++ 2 files changed, 50 insertions(+) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index d9948d58b3f4..78f37f7c3462 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -392,6 +392,7 @@ static long dma_buf_ioctl(struct file *file, { struct dma_buf *dmabuf; struct dma_buf_sync sync; + struct dma_buf_sync_partial sync_p; enum dma_data_direction direction; int ret; @@ -430,6 +431,47 @@ static long dma_buf_ioctl(struct file *file, case DMA_BUF_SET_NAME_B: return dma_buf_set_name(dmabuf, (const char __user *)arg); + case DMA_BUF_IOCTL_SYNC_PARTIAL: + if (copy_from_user(&sync_p, (void __user *) arg, sizeof(sync_p))) + return -EFAULT; + + if (sync_p.len == 0) + return 0; + + if ((sync_p.offset % cache_line_size()) || (sync_p.len % cache_line_size())) + return -EINVAL; + + if (sync_p.len > dmabuf->size || sync_p.offset > dmabuf->size - sync_p.len) + return -EINVAL; + + if (sync_p.flags & ~DMA_BUF_SYNC_VALID_FLAGS_MASK) + return -EINVAL; + + switch (sync_p.flags & DMA_BUF_SYNC_RW) { + case DMA_BUF_SYNC_READ: + direction = DMA_FROM_DEVICE; + break; + case DMA_BUF_SYNC_WRITE: + direction = DMA_TO_DEVICE; + break; + case DMA_BUF_SYNC_RW: + direction = DMA_BIDIRECTIONAL; + break; + default: + return -EINVAL; + } + + if (sync_p.flags & DMA_BUF_SYNC_END) + ret = dma_buf_end_cpu_access_partial(dmabuf, direction, + sync_p.offset, + sync_p.len); + else + ret = dma_buf_begin_cpu_access_partial(dmabuf, direction, + sync_p.offset, + sync_p.len); + + return ret; + default: return -ENOTTY; } diff --git a/include/uapi/linux/dma-buf.h b/include/uapi/linux/dma-buf.h index 7f30393b92c3..6236c644624d 100644 --- a/include/uapi/linux/dma-buf.h +++ b/include/uapi/linux/dma-buf.h @@ -47,4 +47,12 @@ struct dma_buf_sync { #define DMA_BUF_SET_NAME_A _IOW(DMA_BUF_BASE, 1, u32) #define DMA_BUF_SET_NAME_B _IOW(DMA_BUF_BASE, 1, u64) +struct dma_buf_sync_partial { + __u64 flags; + __u32 offset; + __u32 len; +}; + +#define DMA_BUF_IOCTL_SYNC_PARTIAL _IOW(DMA_BUF_BASE, 2, struct dma_buf_sync_partial) + #endif -- 2.25.1 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip