From patchwork Mon Mar 15 05:37:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 12138361 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F31FC4160E for ; Mon, 15 Mar 2021 05:39:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 424FC64E37 for ; Mon, 15 Mar 2021 05:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230331AbhCOFix (ORCPT ); Mon, 15 Mar 2021 01:38:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230180AbhCOFi1 (ORCPT ); Mon, 15 Mar 2021 01:38:27 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51EB4C061574 for ; Sun, 14 Mar 2021 22:38:27 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id j6-20020a17090adc86b02900cbfe6f2c96so14119241pjv.1 for ; Sun, 14 Mar 2021 22:38:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=P/3zALspLSxFVgxa420xFghjxZDebD6dVQ7y7utAibE=; b=ACAc2f1GmAazLjOqMvvxvkxWPsJsk5l8GH5Gs5zEQgoozUM3itrYVk4Wx3X+k9Ha0Z Zfcd/wBYz+Hy+fKyl1Ypi/qAgRzNhBN0MtSUomXEYb7fqnnGSRY0Z5jckrthOZqGMS0c CEYTgBfHllx/+8Vw04THD5n6xmPdqNFvqvqu8+Dod4nWcae1yx3i9i6w7mhApfdjoSF0 JZVB6JZxwQPA3Fd4YMIBTI2lo/z997gsskQEQPZd3ZVKdsv6muV5n/HpueE9uqa3ua8f yN1ChaYUuXTuQ7h0bq1Eo56PAzOpOLaEkTSqApmb1RH62M9YDfUGk4HE/9dx0xjiYDym 5n4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P/3zALspLSxFVgxa420xFghjxZDebD6dVQ7y7utAibE=; b=Fq36ngR3l5qbTG2G//1bnfhzr7XSzQVflFO9jW/JoLkO/WGpQESJXkdq0jFKpbZUL0 keNl4ktMQAkDbajfeOHq/uKA5XRr1JJWpwIfISxkd1ISXpHPzo9SHSR+ltufx4hJup/y wE2ciJ+gdA2A0GKXz4BFii3F6QHa0dKPFDbCtwkIqzAWUieIHzRY1lwy+qRUIdCJqOY/ g5WiU99GgOAn0woiCg5esnIstTJ6UYaObTQlj6YV9ipvP674MHXoyLEWHQXfxzeZJ8Dm Whh9bMs/mIL1zuGxivAsAjPj1J4ljkWGbnJLiIQ4MWXPGkjlfVCqEIjsTgLYEguDptuI +CGw== X-Gm-Message-State: AOAM532XYh8RacWhR7UDnYyhwBKAaeo7tIqPZ0DlJLjTTZEo34/V9TYw ZZxVgjx1jAlIUX5pd07WoG3m X-Google-Smtp-Source: ABdhPJy7OEuy5awQEQoSJcJXbxqYr6jjC5aj/lbgmiXvRp3orJRy+soCtvCRBg08Gq4rmHmLxlGXTg== X-Received: by 2002:a17:90b:16cd:: with SMTP id iy13mr4607320pjb.46.1615786706994; Sun, 14 Mar 2021 22:38:26 -0700 (PDT) Received: from localhost ([139.177.225.227]) by smtp.gmail.com with ESMTPSA id s1sm11783866pfe.151.2021.03.14.22.38.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Mar 2021 22:38:26 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v5 10/11] vduse: Add config interrupt support Date: Mon, 15 Mar 2021 13:37:20 +0800 Message-Id: <20210315053721.189-11-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210315053721.189-1-xieyongji@bytedance.com> References: <20210315053721.189-1-xieyongji@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch introduces a new ioctl VDUSE_INJECT_CONFIG_IRQ to support injecting config interrupt. Signed-off-by: Xie Yongji --- drivers/vdpa/vdpa_user/vduse_dev.c | 24 +++++++++++++++++++++++- include/uapi/linux/vduse.h | 3 +++ 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c index 07d0ae92d470..cc12b58bdc09 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -64,6 +64,8 @@ struct vduse_dev { struct list_head send_list; struct list_head recv_list; struct list_head list; + struct vdpa_callback config_cb; + spinlock_t irq_lock; bool connected; int minor; u16 vq_size_max; @@ -439,6 +441,11 @@ static void vduse_dev_reset(struct vduse_dev *dev) vduse_domain_reset_bounce_map(dev->domain); vduse_dev_update_iotlb(dev, 0ULL, ULLONG_MAX); + spin_lock(&dev->irq_lock); + dev->config_cb.callback = NULL; + dev->config_cb.private = NULL; + spin_unlock(&dev->irq_lock); + for (i = 0; i < dev->vq_num; i++) { struct vduse_virtqueue *vq = &dev->vqs[i]; @@ -557,7 +564,12 @@ static int vduse_vdpa_set_features(struct vdpa_device *vdpa, u64 features) static void vduse_vdpa_set_config_cb(struct vdpa_device *vdpa, struct vdpa_callback *cb) { - /* We don't support config interrupt */ + struct vduse_dev *dev = vdpa_to_vduse(vdpa); + + spin_lock(&dev->irq_lock); + dev->config_cb.callback = cb->callback; + dev->config_cb.private = cb->private; + spin_unlock(&dev->irq_lock); } static u16 vduse_vdpa_get_vq_num_max(struct vdpa_device *vdpa) @@ -842,6 +854,15 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, ret = 0; queue_work(vduse_irq_wq, &dev->vqs[arg].inject); break; + case VDUSE_INJECT_CONFIG_IRQ: + ret = -EINVAL; + spin_lock_irq(&dev->irq_lock); + if (dev->config_cb.callback) { + dev->config_cb.callback(dev->config_cb.private); + ret = 0; + } + spin_unlock_irq(&dev->irq_lock); + break; default: ret = -ENOIOCTLCMD; break; @@ -918,6 +939,7 @@ static struct vduse_dev *vduse_dev_create(void) INIT_LIST_HEAD(&dev->send_list); INIT_LIST_HEAD(&dev->recv_list); atomic64_set(&dev->msg_unique, 0); + spin_lock_init(&dev->irq_lock); init_waitqueue_head(&dev->waitq); diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h index 37f7d7059aa8..337e766f5622 100644 --- a/include/uapi/linux/vduse.h +++ b/include/uapi/linux/vduse.h @@ -150,4 +150,7 @@ struct vduse_vq_eventfd { /* Inject an interrupt for specific virtqueue */ #define VDUSE_INJECT_VQ_IRQ _IO(VDUSE_BASE, 0x05) +/* Inject a config interrupt */ +#define VDUSE_INJECT_CONFIG_IRQ _IO(VDUSE_BASE, 0x06) + #endif /* _UAPI_VDUSE_H_ */