From patchwork Fri Jun 19 18:23:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 11614901 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 62ADE913 for ; Fri, 19 Jun 2020 18:24:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 45B8121527 for ; Fri, 19 Jun 2020 18:24:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MDa2ktHD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2436621AbgFSSYM (ORCPT ); Fri, 19 Jun 2020 14:24:12 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:48822 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2406019AbgFSSX4 (ORCPT ); Fri, 19 Jun 2020 14:23:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1592591035; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tYgwx/S0czXjeI7eutEPjbQtilI+2+QRsI8jC+dRvu0=; b=MDa2ktHDrZh/yhnpT41WKmR+669NQoSvzIl0kahZy7uts0BZBez3/0fZ9c6IyXdN5DwHUs 5TlAT2KKUVCo4hyG30fVtxvbdo28fgJ1L6i2TZNmtJyrunkn4aT044L8esY8UXfD/LrnJC KEHBzyhp8HezJEH87PoQofLN/aiGhac= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-156-tynZoVW8NMe7yZ9Pwu3JHg-1; Fri, 19 Jun 2020 14:23:53 -0400 X-MC-Unique: tynZoVW8NMe7yZ9Pwu3JHg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 17D8C107B767; Fri, 19 Jun 2020 18:23:52 +0000 (UTC) Received: from eperezma.remote.csb (ovpn-113-14.ams2.redhat.com [10.36.113.14]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6B6011CA; Fri, 19 Jun 2020 18:23:42 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: mst@redhat.com Cc: kvm list , Stefano Garzarella , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Stefan Hajnoczi , Jason Wang Subject: [RFC v9 11/11] vhost: drop head based APIs Date: Fri, 19 Jun 2020 20:23:02 +0200 Message-Id: <20200619182302.850-12-eperezma@redhat.com> In-Reply-To: <20200619182302.850-1-eperezma@redhat.com> References: <20200619182302.850-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: "Michael S. Tsirkin" Everyone's using buf APIs, no need for head based ones anymore. Signed-off-by: Michael S. Tsirkin Signed-off-by: Eugenio Pérez --- drivers/vhost/vhost.c | 58 +++---------------------------------------- drivers/vhost/vhost.h | 12 --------- 2 files changed, 4 insertions(+), 66 deletions(-) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index e227e0667790..736fa1a3cee5 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -2423,39 +2423,11 @@ EXPORT_SYMBOL_GPL(vhost_get_avail_buf); /* Reverse the effect of vhost_get_avail_buf. Useful for error handling. */ void vhost_discard_avail_bufs(struct vhost_virtqueue *vq, struct vhost_buf *buf, unsigned count) -{ - vhost_discard_vq_desc(vq, count); -} -EXPORT_SYMBOL_GPL(vhost_discard_avail_bufs); - -/* This function returns the descriptor number found, or vq->num (which is - * never a valid descriptor number) if none was found. A negative code is - * returned on error. */ -int vhost_get_vq_desc(struct vhost_virtqueue *vq, - struct iovec iov[], unsigned int iov_size, - unsigned int *out_num, unsigned int *in_num, - struct vhost_log *log, unsigned int *log_num) -{ - struct vhost_buf buf; - int ret = vhost_get_avail_buf(vq, &buf, - iov, iov_size, out_num, in_num, - log, log_num); - - if (likely(ret > 0)) - return buf.id; - if (likely(!ret)) - return vq->num; - return ret; -} -EXPORT_SYMBOL_GPL(vhost_get_vq_desc); - -/* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */ -void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n) { unfetch_descs(vq); - vq->last_avail_idx -= n; + vq->last_avail_idx -= count; } -EXPORT_SYMBOL_GPL(vhost_discard_vq_desc); +EXPORT_SYMBOL_GPL(vhost_discard_avail_bufs); static int __vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, @@ -2491,7 +2463,7 @@ static int __vhost_add_used_n(struct vhost_virtqueue *vq, /* After we've used one of their buffers, we tell them about it. We'll then * want to notify the guest, using eventfd. */ -int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, +static int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, unsigned count) { int start, n, r; @@ -2524,11 +2496,10 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, } return r; } -EXPORT_SYMBOL_GPL(vhost_add_used_n); /* After we've used one of their buffers, we tell them about it. We'll then * want to notify the guest, using eventfd. */ -int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len) +static int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len) { struct vring_used_elem heads = { cpu_to_vhost32(vq, head), @@ -2537,7 +2508,6 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len) return vhost_add_used_n(vq, &heads, 1); } -EXPORT_SYMBOL_GPL(vhost_add_used); int vhost_put_used_buf(struct vhost_virtqueue *vq, struct vhost_buf *buf) { @@ -2605,26 +2575,6 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) } EXPORT_SYMBOL_GPL(vhost_signal); -/* And here's the combo meal deal. Supersize me! */ -void vhost_add_used_and_signal(struct vhost_dev *dev, - struct vhost_virtqueue *vq, - unsigned int head, int len) -{ - vhost_add_used(vq, head, len); - vhost_signal(dev, vq); -} -EXPORT_SYMBOL_GPL(vhost_add_used_and_signal); - -/* multi-buffer version of vhost_add_used_and_signal */ -void vhost_add_used_and_signal_n(struct vhost_dev *dev, - struct vhost_virtqueue *vq, - struct vring_used_elem *heads, unsigned count) -{ - vhost_add_used_n(vq, heads, count); - vhost_signal(dev, vq); -} -EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n); - /* return true if we're sure that avaiable ring is empty */ bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq) { diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 28eea0155efb..264a2a2fae97 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -197,11 +197,6 @@ long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *arg bool vhost_vq_access_ok(struct vhost_virtqueue *vq); bool vhost_log_access_ok(struct vhost_dev *); -int vhost_get_vq_desc(struct vhost_virtqueue *, - struct iovec iov[], unsigned int iov_count, - unsigned int *out_num, unsigned int *in_num, - struct vhost_log *log, unsigned int *log_num); -void vhost_discard_vq_desc(struct vhost_virtqueue *, int n); int vhost_get_avail_buf(struct vhost_virtqueue *, struct vhost_buf *buf, struct iovec iov[], unsigned int iov_count, unsigned int *out_num, unsigned int *in_num, @@ -209,13 +204,6 @@ int vhost_get_avail_buf(struct vhost_virtqueue *, struct vhost_buf *buf, void vhost_discard_avail_bufs(struct vhost_virtqueue *, struct vhost_buf *, unsigned count); int vhost_vq_init_access(struct vhost_virtqueue *); -int vhost_add_used(struct vhost_virtqueue *, unsigned int head, int len); -int vhost_add_used_n(struct vhost_virtqueue *, struct vring_used_elem *heads, - unsigned count); -void vhost_add_used_and_signal(struct vhost_dev *, struct vhost_virtqueue *, - unsigned int id, int len); -void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, - struct vring_used_elem *heads, unsigned count); int vhost_put_used_buf(struct vhost_virtqueue *, struct vhost_buf *buf); int vhost_put_used_n_bufs(struct vhost_virtqueue *, struct vhost_buf *bufs, unsigned count);