From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 875AEA04A9; Tue, 25 Jan 2022 07:54:12 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 65B4542882; Tue, 25 Jan 2022 07:53:39 +0100 (CET) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by mails.dpdk.org (Postfix) with ESMTP id 795754289C for ; Tue, 25 Jan 2022 07:53:37 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643093617; x=1674629617; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=y6rcAdI9zXMDEW5jHIi8SQtr8ojYhewXUelobSRsLSw=; b=VZKZPjwt+o6ildeJQU4khC6SeQEPbtNZBmUpMXBRPnRrlPPeTY2p43mq 2N4jbYdjdC5WCgU0iTu8yNNkzkjDrRacn42RRpVZ4qjUws0RRAsgCiLtQ LhBTpsIDbe+9WutSEeyEw+m4aIA32Wgj/8+cLRnnfvu+opwmsrXp1ty12 ycLe9VPX6aC/0cJT/+qMRXUNHcgATOtsc+jmxdOJiwSUC8+4KNkw19Cg2 dzHScJaDY7rw9CjMIfhkLCSuyF1DvMF+ORGzn8FVc5Okvao6wisvofVaP cFcM7vChi0weMUwVJ3pK36bfsNe5l5kEtvIbWyzlq4j5md4iPA9BeTTRI g==; X-IronPort-AV: E=McAfee;i="6200,9189,10237"; a="246181345" X-IronPort-AV: E=Sophos;i="5.88,314,1635231600"; d="scan'208";a="246181345" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 22:53:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,314,1635231600"; d="scan'208";a="695724355" Received: from dpdk-dipei.sh.intel.com ([10.67.111.91]) by orsmga005.jf.intel.com with ESMTP; 24 Jan 2022 22:53:35 -0800 From: Andy Pei To: dev@dpdk.org Cc: chenbo.xia@intel.com, maxime.coquelin@redhat.com, gang.cao@intel.com, changpeng.liu@intel.com Subject: [PATCH 11/15] vdpa: add config space change interrupt register and handle for virtio_blk Date: Tue, 25 Jan 2022 14:47:34 +0800 Message-Id: <1643093258-47258-12-git-send-email-andy.pei@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1643093258-47258-1-git-send-email-andy.pei@intel.com> References: <1643093258-47258-1-git-send-email-andy.pei@intel.com> X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Create a thread to poll and relay config space change interrupt. Use VHOST_USER_SLAVE_CONFIG_CHANGE_MSG to info qemu. Signed-off-by: Andy Pei --- drivers/vdpa/ifc/ifcvf_vdpa.c | 113 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c index f092aca..2552375 100644 --- a/drivers/vdpa/ifc/ifcvf_vdpa.c +++ b/drivers/vdpa/ifc/ifcvf_vdpa.c @@ -53,7 +53,9 @@ struct ifcvf_internal { int vfio_group_fd; int vfio_dev_fd; pthread_t tid; /* thread for notify relay */ + pthread_t intr_tid; /* thread for intr relay */ int epfd; + int csc_fd; int vid; struct rte_vdpa_device *vdev; uint16_t max_queues; @@ -622,6 +624,108 @@ struct rte_vdpa_dev_info { return 0; } +static void +virtio_interrupt_handler(struct ifcvf_internal *internal) +{ + int vid = internal->vid; + int ret; + + ret = rte_vhost_slave_config_change(vid, 1); + if (ret) + DRV_LOG(ERR, "failed to notify the guest about configuration space change."); + + return; +} + +static void * +intr_relay(void *arg) +{ + struct ifcvf_internal *internal = (struct ifcvf_internal *)arg; + struct epoll_event csc_event; + struct epoll_event ev; + uint64_t buf; + int nbytes; + int csc_fd, csc_val = 0; + + csc_fd = epoll_create(1); + if (csc_fd < 0) { + DRV_LOG(ERR, "failed to create epoll for config space change."); + return NULL; + } + + ev.events = EPOLLIN | EPOLLPRI | EPOLLRDHUP | EPOLLHUP; + ev.data.fd = rte_intr_fd_get(internal->pdev->intr_handle); + if (epoll_ctl(csc_fd, EPOLL_CTL_ADD, + rte_intr_fd_get(internal->pdev->intr_handle), &ev) < 0) { + DRV_LOG(ERR, "epoll add error: %s", strerror(errno)); + return NULL; + } + + internal->csc_fd = csc_fd; + + for (;;) { + csc_val = epoll_wait(csc_fd, &csc_event, 1, -1); + if (csc_val < 0) { + if (errno == EINTR) + continue; + DRV_LOG(ERR, "epoll_wait return fail\n"); + return NULL; + } else if (csc_val == 0) { + continue; + } else { + /* csc_val > 0 */ + nbytes = read(csc_event.data.fd, &buf, 8); + if (nbytes < 0) { + if (errno == EINTR || errno == EWOULDBLOCK) + continue; + DRV_LOG(ERR, "Error reading from file descriptor %d: %s\n", + csc_event.data.fd, + strerror(errno)); + return NULL; + } else if (nbytes == 0) { + DRV_LOG(ERR, "Read nothing from file descriptor %d\n", + csc_event.data.fd); + continue; + } else { + virtio_interrupt_handler(internal); + } + } + } + return NULL; +} + +static int +setup_intr_relay(struct ifcvf_internal *internal) +{ + int ret; + + ret = pthread_create(&internal->intr_tid, NULL, intr_relay, + (void *)internal); + if (ret) { + DRV_LOG(ERR, "failed to create notify relay pthread."); + return -1; + } + return 0; +} + +static int +unset_intr_relay(struct ifcvf_internal *internal) +{ + void *status; + + if (internal->intr_tid) { + pthread_cancel(internal->intr_tid); + pthread_join(internal->intr_tid, &status); + } + internal->intr_tid = 0; + + if (internal->csc_fd >= 0) + close(internal->csc_fd); + internal->csc_fd = -1; + + return 0; +} + static int update_datapath(struct ifcvf_internal *internal) { @@ -648,10 +752,16 @@ struct rte_vdpa_dev_info { if (ret) goto err; + ret = setup_intr_relay(internal); + if (ret) + goto err; + rte_atomic32_set(&internal->running, 1); } else if (rte_atomic32_read(&internal->running) && (!rte_atomic32_read(&internal->started) || !rte_atomic32_read(&internal->dev_attached))) { + ret = unset_intr_relay(internal); + ret = unset_notify_relay(internal); if (ret) goto err; @@ -969,6 +1079,9 @@ struct rte_vdpa_dev_info { vdpa_ifcvf_stop(internal); else if (internal->device_type == IFCVF_BLK) vdpa_ifcvf_blk_pause(internal); + + unset_intr_relay(internal); + vdpa_disable_vfio_intr(internal); ret = rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, false); -- 1.8.3.1