From patchwork Tue Jul 26 07:21:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12928814 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 503EFCCA494 for ; Tue, 26 Jul 2022 07:23:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238102AbiGZHXB (ORCPT ); Tue, 26 Jul 2022 03:23:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237891AbiGZHWw (ORCPT ); Tue, 26 Jul 2022 03:22:52 -0400 Received: from out199-16.us.a.mail.aliyun.com (out199-16.us.a.mail.aliyun.com [47.90.199.16]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18E912AC67; Tue, 26 Jul 2022 00:22:42 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;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=37;SR=0;TI=SMTPD_---0VKUN6LO_1658820155; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VKUN6LO_1658820155) by smtp.aliyun-inc.com; Tue, 26 Jul 2022 15:22:36 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Richard Weinberger , Anton Ivanov , Johannes Berg , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Mark Gross , 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 , Xuan Zhuo , Vincent Whitchurch , 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, kangjie.xu@linux.alibaba.com Subject: [PATCH v13 05/42] virtio_ring: split vring_virtqueue Date: Tue, 26 Jul 2022 15:21:48 +0800 Message-Id: <20220726072225.19884-6-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220726072225.19884-1-xuanzhuo@linux.alibaba.com> References: <20220726072225.19884-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 19d2a6aae0b1 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Separate the two inline structures(split and packed) from the structure vring_virtqueue. In this way, we can use these two structures later to pass parameters and retain temporary variables. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/virtio/virtio_ring.c | 116 ++++++++++++++++++----------------- 1 file changed, 60 insertions(+), 56 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index a3d76fd87983..1bc5794e9739 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -85,6 +85,64 @@ struct vring_desc_extra { u16 next; /* The next desc state in a list. */ }; +struct vring_virtqueue_split { + /* Actual memory layout for this queue. */ + struct vring vring; + + /* Last written value to avail->flags */ + u16 avail_flags_shadow; + + /* + * Last written value to avail->idx in + * guest byte order. + */ + u16 avail_idx_shadow; + + /* Per-descriptor state. */ + struct vring_desc_state_split *desc_state; + struct vring_desc_extra *desc_extra; + + /* DMA address and size information */ + dma_addr_t queue_dma_addr; + size_t queue_size_in_bytes; +}; + +struct vring_virtqueue_packed { + /* Actual memory layout for this queue. */ + struct { + unsigned int num; + struct vring_packed_desc *desc; + struct vring_packed_desc_event *driver; + struct vring_packed_desc_event *device; + } vring; + + /* Driver ring wrap counter. */ + bool avail_wrap_counter; + + /* Avail used flags. */ + u16 avail_used_flags; + + /* Index of the next avail descriptor. */ + u16 next_avail_idx; + + /* + * Last written value to driver->flags in + * guest byte order. + */ + u16 event_flags_shadow; + + /* Per-descriptor state. */ + struct vring_desc_state_packed *desc_state; + struct vring_desc_extra *desc_extra; + + /* DMA address and size information */ + dma_addr_t ring_dma_addr; + dma_addr_t driver_event_dma_addr; + dma_addr_t device_event_dma_addr; + size_t ring_size_in_bytes; + size_t event_size_in_bytes; +}; + struct vring_virtqueue { struct virtqueue vq; @@ -124,64 +182,10 @@ struct vring_virtqueue { union { /* Available for split ring */ - struct { - /* Actual memory layout for this queue. */ - struct vring vring; - - /* Last written value to avail->flags */ - u16 avail_flags_shadow; - - /* - * Last written value to avail->idx in - * guest byte order. - */ - u16 avail_idx_shadow; - - /* Per-descriptor state. */ - struct vring_desc_state_split *desc_state; - struct vring_desc_extra *desc_extra; - - /* DMA address and size information */ - dma_addr_t queue_dma_addr; - size_t queue_size_in_bytes; - } split; + struct vring_virtqueue_split split; /* Available for packed ring */ - struct { - /* Actual memory layout for this queue. */ - struct { - unsigned int num; - struct vring_packed_desc *desc; - struct vring_packed_desc_event *driver; - struct vring_packed_desc_event *device; - } vring; - - /* Driver ring wrap counter. */ - bool avail_wrap_counter; - - /* Avail used flags. */ - u16 avail_used_flags; - - /* Index of the next avail descriptor. */ - u16 next_avail_idx; - - /* - * Last written value to driver->flags in - * guest byte order. - */ - u16 event_flags_shadow; - - /* Per-descriptor state. */ - struct vring_desc_state_packed *desc_state; - struct vring_desc_extra *desc_extra; - - /* DMA address and size information */ - dma_addr_t ring_dma_addr; - dma_addr_t driver_event_dma_addr; - dma_addr_t device_event_dma_addr; - size_t ring_size_in_bytes; - size_t event_size_in_bytes; - } packed; + struct vring_virtqueue_packed packed; }; /* How to notify other side. FIXME: commonalize hcalls! */