From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
by inbox.dpdk.org (Postfix) with ESMTP id 147AFA0093;
Thu, 21 Apr 2022 11:20:41 +0200 (CEST)
Received: from [217.70.189.124] (localhost [127.0.0.1])
by mails.dpdk.org (Postfix) with ESMTP id 6F8CA427F1;
Thu, 21 Apr 2022 11:20:05 +0200 (CEST)
Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31])
by mails.dpdk.org (Postfix) with ESMTP id 5888C41140
for <dev@dpdk.org>; Thu, 21 Apr 2022 11:20:03 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple;
d=intel.com; i=@intel.com; q=dns/txt; s=Intel;
t=1650532803; x=1682068803;
h=from:to:cc:subject:date:message-id:in-reply-to: references;
bh=OhXTTmE1PSTDRlJaNjCal3366Ju/aAiLVUQwHbRd0+M=;
b=V19dK17X4fCYLOZavI1JgCm/pvdOtmSmUXe9UXX2C7Qr/bQciHBsQEsq
Wi8ET4Ec+MtE3AZodJOnRwR7aJ7vLzJryURrqYKEECAEqF2uVakaMTneZ
mnYOB6wtnlCXHv+zaMenLjpDkP31VjTdaHcQA6j+7vbuVMLEJMmQlka2t
2O0FHR0kJW1+XtNN/VaGbOixO76Uk+JKd4Y2A4hiFpIkNk6cfdunhdPnE
BXJA1Mtd2dFc7o78TXp0/i7JIiyIP1juSgOAdEshCbSroGXFug76AATcP
4/hIjcIZRVMc//0bFPuhSbZqS0M+MtM7Jv6JJBE9r732gyGUY0iKGSweq w==;
X-IronPort-AV: E=McAfee;i="6400,9594,10323"; a="324734870"
X-IronPort-AV: E=Sophos;i="5.90,278,1643702400"; d="scan'208";a="324734870"
Received: from orsmga001.jf.intel.com ([10.7.209.18])
by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;
21 Apr 2022 02:20:03 -0700
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.90,278,1643702400"; d="scan'208";a="593568307"
Received: from dpdk-dipei.sh.intel.com ([10.67.110.238])
by orsmga001.jf.intel.com with ESMTP; 21 Apr 2022 02:20:00 -0700
From: Andy Pei <andy.pei@intel.com>
To: dev@dpdk.org
Cc: chenbo.xia@intel.com, maxime.coquelin@redhat.com, gang.cao@intel.com,
changpeng.liu@intel.com
Subject: [PATCH v6 12/16] vdpa/ifc: add interrupt and handle for virtio blk
Date: Thu, 21 Apr 2022 16:33:50 +0800
Message-Id: <1650530034-59744-13-git-send-email-andy.pei@intel.com>
X-Mailer: git-send-email 1.8.3.1
In-Reply-To: <1650530034-59744-1-git-send-email-andy.pei@intel.com>
References: <1643093258-47258-2-git-send-email-andy.pei@intel.com>
<1650530034-59744-1-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 <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
<mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
<mailto:dev-request@dpdk.org?subject=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 <andy.pei@intel.com>
---
drivers/vdpa/ifc/ifcvf_vdpa.c | 112 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 112 insertions(+)
diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
index e8e7d61..c02ae4d 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;
@@ -608,6 +610,107 @@ 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.");
+}
+
+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)
{
@@ -634,10 +737,16 @@ 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;
@@ -958,6 +1067,9 @@ 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