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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id BD1A1C54E59 for ; Thu, 29 Feb 2024 07:21:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=nhDsd+wn0QBsofx/3qFq8QiR22mUJhxgqbGJMfSse1s=; b=lyQCGvlIX2wFY68amejU6YJ/uq uef5fxmDBtZ8V/lEe66iCed7CFT1OL5BRMpPqYxTDi38apH/MiVlfAAiMOPnt7JKE8TCGAqnYpoWd THQtN+BXvR80VBfP9bjuOpdz93cj5QFhaUSH7kYEvQ+Zi64f+86K2CKKF8yGtPFHt5ERfOyNggqko tutM2qg9fc3D1C1TUu6Ovjpf72QjuoJybaTSp9Pia/nhuiUauTbFmyfNfYc9hM/Rdd+KJB0Id4tzW jlMlIGRtvNc4+KYW5TFuUbInws1qUQ4N/eKfZLa2Tth1Np3HHROkeUNBcPECsTCvEvW8Aqvds/Cdh 2lrBcmGA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rfajF-0000000CSCU-0gC7; Thu, 29 Feb 2024 07:21:17 +0000 Received: from out30-100.freemail.mail.aliyun.com ([115.124.30.100]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rfaj7-0000000CS3l-2Rpz for linux-um@lists.infradead.org; Thu, 29 Feb 2024 07:21:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1709191267; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=nhDsd+wn0QBsofx/3qFq8QiR22mUJhxgqbGJMfSse1s=; b=jnMwUFKHXz/6PyBGHNNVV9IzX6wyPedslFg1WlxXTLsD7jw+3KlUTd0Nx4aokHmn/DbfwTFRbMRAzNB320/h7e+f1weR0S9rp+Qv11uDXFnkx/0EZwj4Jf4J4bJ88MF4YTjSgB+FDd0ZRpm9GaN2vFyntkJHThNM5WWw1l1Tw7I= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=35;SR=0;TI=SMTPD_---0W1SAVB4_1709191264; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0W1SAVB4_1709191264) by smtp.aliyun-inc.com; Thu, 29 Feb 2024 15:21:05 +0800 From: Xuan Zhuo To: virtualization@lists.linux.dev Cc: Richard Weinberger , Anton Ivanov , Johannes Berg , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH vhost v3 12/19] virtio_ring: export premapped to driver by struct virtqueue Date: Thu, 29 Feb 2024 15:20:37 +0800 Message-Id: <20240229072044.77388-13-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20240229072044.77388-1-xuanzhuo@linux.alibaba.com> References: <20240229072044.77388-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: e3a3e51d6b70 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240228_232109_974934_4509A178 X-CRM114-Status: GOOD ( 11.93 ) X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org Export the premapped to drivers, then drivers can check the vq premapped mode after the find_vqs(). Because the find_vqs() just try to enable the vq premapped mode, the driver must check that after find_vqs(). Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 13 +++++-------- include/linux/virtio.h | 1 + 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index dade5c130329..103b06574e8b 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -191,9 +191,6 @@ struct vring_virtqueue { /* Host publishes avail event idx */ bool event; - /* Do DMA mapping by driver */ - bool premapped; - /* Head of free buffer list. */ unsigned int free_head; /* Number we've added since last sync. */ @@ -311,7 +308,7 @@ static bool vring_use_dma_api(const struct virtio_device *vdev) static bool vring_need_unmap_buffer(const struct vring_virtqueue *vring) { - return vring->use_dma_api && !vring->premapped; + return vring->use_dma_api && !vring->vq.premapped; } size_t virtio_max_dma_size(const struct virtio_device *vdev) @@ -383,7 +380,7 @@ static struct device *vring_dma_dev(const struct vring_virtqueue *vq) static int vring_map_one_sg(const struct vring_virtqueue *vq, struct scatterlist *sg, enum dma_data_direction direction, dma_addr_t *addr) { - if (vq->premapped) { + if (vq->vq.premapped) { *addr = sg_dma_address(sg); return 0; } @@ -2145,7 +2142,7 @@ static struct virtqueue *vring_create_virtqueue_packed(struct virtio_device *vde vq->packed_ring = true; vq->dma_dev = dma_dev; vq->use_dma_api = vring_use_dma_api(vdev); - vq->premapped = vq->use_dma_api && cfg_vq_get(cfg, premapped); + vq->vq.premapped = vq->use_dma_api && cfg_vq_get(cfg, premapped); vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !cfg_vq_get(cfg, ctx); @@ -2687,7 +2684,7 @@ static struct virtqueue *__vring_new_virtqueue(struct virtio_device *vdev, #endif vq->dma_dev = tp_cfg->dma_dev; vq->use_dma_api = vring_use_dma_api(vdev); - vq->premapped = vq->use_dma_api && cfg_vq_get(cfg, premapped); + vq->vq.premapped = vq->use_dma_api && cfg_vq_get(cfg, premapped); vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) && !cfg_vq_get(cfg, ctx); @@ -2818,7 +2815,7 @@ int virtqueue_set_dma_premapped(struct virtqueue *_vq) return -EINVAL; } - vq->premapped = true; + vq->vq.premapped = true; if (vq->packed_ring) { kfree(vq->packed.desc_dma); diff --git a/include/linux/virtio.h b/include/linux/virtio.h index b0201747a263..407277d5a16b 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -36,6 +36,7 @@ struct virtqueue { unsigned int num_free; unsigned int num_max; bool reset; + bool premapped; void *priv; }; -- 2.32.0.3.g01195cf9f