[PATCH v1 22/24] vfio-user: add 'x-msg-timeout' option that specifies msg wait times

[John Johnson <john.g.johnson@oracle.com>]

Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
---
 hw/vfio/pci.c  | 4 ++++
 hw/vfio/pci.h  | 1 +
 hw/vfio/user.c | 7 +++++--
 hw/vfio/user.h | 1 +
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 005fcf8..3ae3a13 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3729,6 +3729,9 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
     if (udev->no_post) {
         proxy->flags |= VFIO_PROXY_NO_POST;
     }
+    if (udev->wait_time) {
+        proxy->wait_time = udev->wait_time;
+    }
 
     vfio_user_validate_version(proxy, &err);
     if (err != NULL) {
@@ -3848,6 +3851,7 @@ static Property vfio_user_pci_dev_properties[] = {
     DEFINE_PROP_BOOL("secure-dma", VFIOUserPCIDevice, secure_dma, false),
     DEFINE_PROP_BOOL("x-send-queued", VFIOUserPCIDevice, send_queued, false),
     DEFINE_PROP_BOOL("x-no-posted-writes", VFIOUserPCIDevice, no_post, false),
+    DEFINE_PROP_UINT32("x-msg-timeout", VFIOUserPCIDevice, wait_time, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index c4b8e5c..48b19ee 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -199,6 +199,7 @@ struct VFIOUserPCIDevice {
     bool secure_dma;    /* disable shared mem for DMA */
     bool send_queued;   /* all sends are queued */
     bool no_post;       /* all regions write are sync */
+    uint32_t wait_time; /* timeout for message replies */
 };
 
 /* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */
diff --git a/hw/vfio/user.c b/hw/vfio/user.c
index ddf9e13..a9e6cf5 100644
--- a/hw/vfio/user.c
+++ b/hw/vfio/user.c
@@ -717,7 +717,8 @@ static void vfio_user_send_wait(VFIOProxy *proxy, VFIOUserHdr *hdr,
 
     if (ret == 0) {
         while (!msg->complete) {
-            if (!qemu_cond_timedwait(&msg->cv, &proxy->lock, wait_time)) {
+            if (!qemu_cond_timedwait(&msg->cv, &proxy->lock,
+                                     proxy->wait_time)) {
                 VFIOUserMsgQ *list;
 
                 list = msg->pending ? &proxy->pending : &proxy->outgoing;
@@ -759,7 +760,8 @@ static void vfio_user_wait_reqs(VFIOProxy *proxy)
         msg = proxy->last_nowait;
         msg->type = VFIO_MSG_WAIT;
         while (!msg->complete) {
-            if (!qemu_cond_timedwait(&msg->cv, &proxy->lock, wait_time)) {
+            if (!qemu_cond_timedwait(&msg->cv, &proxy->lock,
+                                     proxy->wait_time)) {
                 VFIOUserMsgQ *list;
 
                 list = msg->pending ? &proxy->pending : &proxy->outgoing;
@@ -881,6 +883,7 @@ VFIOProxy *vfio_user_connect_dev(SocketAddress *addr, Error **errp)
 
     proxy->flags = VFIO_PROXY_CLIENT;
     proxy->state = VFIO_PROXY_CONNECTED;
+    proxy->wait_time = wait_time;
 
     qemu_mutex_init(&proxy->lock);
     qemu_cond_init(&proxy->close_cv);
diff --git a/hw/vfio/user.h b/hw/vfio/user.h
index d88ffe5..f711861 100644
--- a/hw/vfio/user.h
+++ b/hw/vfio/user.h
@@ -62,6 +62,7 @@ typedef struct VFIOProxy {
     uint64_t max_bitmap;
     uint64_t migr_pgsize;
     int flags;
+    uint32_t wait_time;
     QemuCond close_cv;
     AioContext *ctx;
     QEMUBH *req_bh;
-- 
1.8.3.1