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 smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 32C65C7EE29 for ; Fri, 2 Jun 2023 09:22:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id C057B426E1; Fri, 2 Jun 2023 09:22:31 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org C057B426E1 X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4oRPgwUVcjK4; Fri, 2 Jun 2023 09:22:29 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTPS id D93AC42700; Fri, 2 Jun 2023 09:22:28 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org D93AC42700 Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 83E03C0088; Fri, 2 Jun 2023 09:22:28 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 15161C0029 for ; Fri, 2 Jun 2023 09:22:27 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 8A2BD8439F for ; Fri, 2 Jun 2023 09:22:26 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org 8A2BD8439F X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2sblDXoUhT2h for ; Fri, 2 Jun 2023 09:22:24 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org C836584396 Received: from out30-99.freemail.mail.aliyun.com (out30-99.freemail.mail.aliyun.com [115.124.30.99]) by smtp1.osuosl.org (Postfix) with ESMTPS id C836584396 for ; Fri, 2 Jun 2023 09:22:23 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R201e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=ay29a033018046050; MF=xuanzhuo@linux.alibaba.com; NM=1; PH=DS; RN=14; SR=0; TI=SMTPD_---0Vk9KKpe_1685697735; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0Vk9KKpe_1685697735) by smtp.aliyun-inc.com; Fri, 02 Jun 2023 17:22:16 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Subject: [PATCH vhost v10 08/10] virtio_ring: introduce virtqueue_dma_dev() Date: Fri, 2 Jun 2023 17:22:04 +0800 Message-Id: <20230602092206.50108-9-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> References: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 3bf1b1dbeb8a Cc: Xuan Zhuo , Jesper Dangaard Brouer , Daniel Borkmann , "Michael S. Tsirkin" , netdev@vger.kernel.org, John Fastabend , Alexei Starovoitov , Eric Dumazet , Jakub Kicinski , bpf@vger.kernel.org, Paolo Abeni , "David S. Miller" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 17 +++++++++++++++++ include/linux/virtio.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6771b9661798..56444f872967 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2459,6 +2459,23 @@ int virtqueue_add_inbuf_ctx(struct virtqueue *vq, } EXPORT_SYMBOL_GPL(virtqueue_add_inbuf_ctx); +/** + * virtqueue_dma_dev - get the dma dev + * @_vq: the struct virtqueue we're talking about. + * + * Returns the dma dev. That can been used for dma api. + */ +struct device *virtqueue_dma_dev(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + if (vq->use_dma_api) + return vring_dma_dev(vq); + else + return NULL; +} +EXPORT_SYMBOL_GPL(virtqueue_dma_dev); + /** * virtqueue_kick_prepare - first half of split virtqueue_kick call. * @_vq: the struct virtqueue diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 0a11c5b32fe5..b24f0a665390 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,6 +78,8 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +struct device *virtqueue_dma_dev(struct virtqueue *vq); + bool virtqueue_kick(struct virtqueue *vq); bool virtqueue_kick_prepare(struct virtqueue *vq); -- 2.32.0.3.g01195cf9f _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A062418C2F; Fri, 2 Jun 2023 09:22:23 +0000 (UTC) Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D346E7F; Fri, 2 Jun 2023 02:22:21 -0700 (PDT) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0Vk9KKpe_1685697735; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0Vk9KKpe_1685697735) by smtp.aliyun-inc.com; Fri, 02 Jun 2023 17:22:16 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH vhost v10 08/10] virtio_ring: introduce virtqueue_dma_dev() Date: Fri, 2 Jun 2023 17:22:04 +0800 Message-Id: <20230602092206.50108-9-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> References: <20230602092206.50108-1-xuanzhuo@linux.alibaba.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Git-Hash: 3bf1b1dbeb8a Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 17 +++++++++++++++++ include/linux/virtio.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6771b9661798..56444f872967 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2459,6 +2459,23 @@ int virtqueue_add_inbuf_ctx(struct virtqueue *vq, } EXPORT_SYMBOL_GPL(virtqueue_add_inbuf_ctx); +/** + * virtqueue_dma_dev - get the dma dev + * @_vq: the struct virtqueue we're talking about. + * + * Returns the dma dev. That can been used for dma api. + */ +struct device *virtqueue_dma_dev(struct virtqueue *_vq) +{ + struct vring_virtqueue *vq = to_vvq(_vq); + + if (vq->use_dma_api) + return vring_dma_dev(vq); + else + return NULL; +} +EXPORT_SYMBOL_GPL(virtqueue_dma_dev); + /** * virtqueue_kick_prepare - first half of split virtqueue_kick call. * @_vq: the struct virtqueue diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 0a11c5b32fe5..b24f0a665390 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,6 +78,8 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +struct device *virtqueue_dma_dev(struct virtqueue *vq); + bool virtqueue_kick(struct virtqueue *vq); bool virtqueue_kick_prepare(struct virtqueue *vq); -- 2.32.0.3.g01195cf9f