From patchwork Thu Feb 29 07:20:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13576689 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) (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 AD7E84594C; Thu, 29 Feb 2024 07:20:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.100 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709191254; cv=none; b=Z9gRp3z4gujyRPryYCnLQxRp95zjxF1z6wo+2MLPXhN8UWKqy5yLdwK/ZgHeYTFQlC5O/BmM23BS8kxo9u3Fr5/BPpzyrNyFA7xyChXvld0aeQyqn8mqz3pyuFiJ8186yWTzn3ymZhPEJNb4veM8arDrR6evGN+uDPA5mklmqmE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709191254; c=relaxed/simple; bh=qY2zjoKkbsZeRD1Y+OCc6Pdzxlt3kkl73iuZcnkSngk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=rRa1BKEjFu3A/nWWuSgnNXc9a4sy6CrAWmerZifniqFyt7IqFFaoQGmhHIF3w97btMbgxuBbBCj6y4JKN3XPhCyLAC37EvYp3NOWruBdwhAv5abutdrpuEtuIOk1G1jTRGzC2tBF3srpK9DqY4OpGt8FItBZEJB9eyWHaFXMY60= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=Me1OytPb; arc=none smtp.client-ip=115.124.30.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="Me1OytPb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1709191247; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=V/QiwEFi+hLqHtGYF26e8Bge+srwrBYJXlThf9c9akc=; b=Me1OytPbWjVx37Rae6s0RIRGDf8cihLvJXiZYUEJH7KTxoG9Lnxqxl4TONMfDQevrNoi5i9JPHanyuxy47s04xxt1BE+ikQdXzy4wliPeEKoN6HWSLZ0NY/AaSlyPshZjkfD5WLeXpAdWcS4gnCFPopBItmZlZvBOZg7ziF4Cpo= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R621e4;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_---0W1SCLWW_1709191244; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0W1SCLWW_1709191244) by smtp.aliyun-inc.com; Thu, 29 Feb 2024 15:20:45 +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_J=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 00/19] virtio: drivers maintain dma info for premapped vq Date: Thu, 29 Feb 2024 15:20:25 +0800 Message-Id: <20240229072044.77388-1-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Git-Hash: e3a3e51d6b70 As discussed: http://lore.kernel.org/all/CACGkMEvq0No8QGC46U4mGsMtuD44fD_cfLcPaVmJ3rHYqRZxYg@mail.gmail.com If the virtio is premapped mode, the driver should manage the dma info by self. So the virtio core should not store the dma info. So we can release the memory used to store the dma info. But if the desc_extra has not dma info, we face a new question, it is hard to get the dma info of the desc with indirect flag. For split mode, that is easy from desc, but for the packed mode, it is hard to get the dma info from the desc. And for hardening the dma unmap is saft, we should store the dma info of indirect descs. So I introduce the "structure the indirect desc table" to allocate space to store dma info with the desc table. On the other side, we mix the descs with indirect flag with other descs together to share the unmap api. That is complex. I found if we we distinguish the descs with VRING_DESC_F_INDIRECT before unmap, thing will be clearer. Because of the dma array is allocated in the find_vqs(), so I introduce a new parameter to find_vqs(). Note: this is on the top of [PATCH vhost v1] virtio: packed: fix unmap leak for indirect desc table http://lore.kernel.org/all/20240223071833.26095-1-xuanzhuo@linux.alibaba.com Please review. Thanks v3: 1. fix the conflict with the vp_modern_create_avq(). v2: 1. change the dma item of virtio-net, every item have MAX_SKB_FRAGS + 2 addr + len pairs. 2. introduce virtnet_sq_free_stats for __free_old_xmit v1: 1. rename transport_vq_config to vq_transport_config 2. virtio-net set dma meta number to (ring-size + 1)(MAX_SKB_FRGAS +2) 3. introduce virtqueue_dma_map_sg_attrs 4. separate vring_create_virtqueue to an independent commit Xuan Zhuo (19): virtio_ring: introduce vring_need_unmap_buffer virtio_ring: packed: remove double check of the unmap ops virtio_ring: packed: structure the indirect desc table virtio_ring: split: remove double check of the unmap ops virtio_ring: split: structure the indirect desc table virtio_ring: no store dma info when unmap is not needed virtio: find_vqs: pass struct instead of multi parameters virtio: vring_create_virtqueue: pass struct instead of multi parameters virtio: vring_new_virtqueue(): pass struct instead of multi parameters virtio_ring: simplify the parameters of the funcs related to vring_create/new_virtqueue() virtio: find_vqs: add new parameter premapped virtio_ring: export premapped to driver by struct virtqueue virtio_net: set premapped mode by find_vqs() virtio_ring: remove api of setting vq premapped virtio_ring: introduce dma map api for page virtio_ring: introduce virtqueue_dma_map_sg_attrs virtio_net: unify the code for recycling the xmit ptr virtio_net: rename free_old_xmit_skbs to free_old_xmit virtio_net: sq support premapped mode arch/um/drivers/virtio_uml.c | 31 +- drivers/net/virtio_net.c | 283 ++++++--- drivers/platform/mellanox/mlxbf-tmfifo.c | 24 +- drivers/remoteproc/remoteproc_virtio.c | 31 +- drivers/s390/virtio/virtio_ccw.c | 33 +- drivers/virtio/virtio_mmio.c | 30 +- drivers/virtio/virtio_pci_common.c | 59 +- drivers/virtio/virtio_pci_common.h | 9 +- drivers/virtio/virtio_pci_legacy.c | 16 +- drivers/virtio/virtio_pci_modern.c | 38 +- drivers/virtio/virtio_ring.c | 698 ++++++++++++----------- drivers/virtio/virtio_vdpa.c | 45 +- include/linux/virtio.h | 13 +- include/linux/virtio_config.h | 48 +- include/linux/virtio_ring.h | 82 +-- tools/virtio/virtio_test.c | 4 +- tools/virtio/vringh_test.c | 28 +- 17 files changed, 847 insertions(+), 625 deletions(-) --- 2.32.0.3.g01195cf9f