From patchwork Tue Dec 19 19:29:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kim, Dongwon" X-Patchwork-Id: 10124051 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 14F736019C for ; Tue, 19 Dec 2017 19:37:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 06E1829230 for ; Tue, 19 Dec 2017 19:37:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EFEB529551; Tue, 19 Dec 2017 19:37:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8FFA229230 for ; Tue, 19 Dec 2017 19:37:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 94A5B6E337; Tue, 19 Dec 2017 19:36:34 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 483896E334 for ; Tue, 19 Dec 2017 19:36:28 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Dec 2017 11:36:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,428,1508828400"; d="scan'208";a="4018486" Received: from downor-z87x-ud5h.fm.intel.com ([10.1.122.11]) by orsmga007.jf.intel.com with ESMTP; 19 Dec 2017 11:36:27 -0800 From: Dongwon Kim To: linux-kernel@vger.kernel.org Subject: [RFC PATCH 06/60] hyper_dmabuf: map shared pages only once when importing. Date: Tue, 19 Dec 2017 11:29:22 -0800 Message-Id: <1513711816-2618-6-git-send-email-dongwon.kim@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513711816-2618-1-git-send-email-dongwon.kim@intel.com> References: <1513711816-2618-1-git-send-email-dongwon.kim@intel.com> MIME-Version: 1.0 Cc: xen-devel@lists.xenproject.org, mateuszx.potrola@intel.com, dri-devel@lists.freedesktop.org, dongwon.kim@intel.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Mateusz Polrola If shared pages of buffer were already mapped on importer side, do not map them again on next request to export fd. Signed-off-by: Mateusz Polrola Signed-off-by: Dongwon Kim --- drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c index 90e0c65..af94359 100644 --- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c +++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c @@ -203,7 +203,7 @@ static int hyper_dmabuf_export_fd_ioctl(void *data) if (!data) { printk("user data is NULL\n"); - return -1; + return -EINVAL; } export_fd_attr = (struct ioctl_hyper_dmabuf_export_fd *)data; @@ -218,15 +218,17 @@ static int hyper_dmabuf_export_fd_ioctl(void *data) imported_sgt_info->last_len, imported_sgt_info->nents, HYPER_DMABUF_ID_IMPORTER_GET_SDOMAIN_ID(imported_sgt_info->hyper_dmabuf_id)); - imported_sgt_info->sgt = hyper_dmabuf_map_pages(imported_sgt_info->gref, - imported_sgt_info->frst_ofst, - imported_sgt_info->last_len, - imported_sgt_info->nents, - HYPER_DMABUF_ID_IMPORTER_GET_SDOMAIN_ID(imported_sgt_info->hyper_dmabuf_id), - &imported_sgt_info->shared_pages_info); - if (!imported_sgt_info->sgt) { - return -1; + imported_sgt_info->sgt = hyper_dmabuf_map_pages(imported_sgt_info->gref, + imported_sgt_info->frst_ofst, + imported_sgt_info->last_len, + imported_sgt_info->nents, + HYPER_DMABUF_ID_IMPORTER_GET_SDOMAIN_ID(imported_sgt_info->hyper_dmabuf_id), + &imported_sgt_info->shared_pages_info); + if (!imported_sgt_info->sgt) { + printk("Failed to create sgt\n"); + return -EINVAL; + } } export_fd_attr->fd = hyper_dmabuf_export_fd(imported_sgt_info, export_fd_attr->flags);