[Qemu-devel] [PATCH 2/6] usb: Call wakeup when data becomes available for all devices with int eps

[Gerd Hoffmann <kraxel@redhat.com>]

From: Hans de Goede <hdegoede@redhat.com>

This is necessary for proper interaction with the xhci controller, and it
will allow other hcds to lower there frame timer while waiting for interrupt
data.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb/dev-hub.c     |    2 ++
 hw/usb/dev-network.c |    7 +++++++
 hw/usb/dev-wacom.c   |    4 ++++
 hw/usb/redirect.c    |    4 ++++
 4 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/hw/usb/dev-hub.c b/hw/usb/dev-hub.c
index 9ee60dd..470fbbb 100644
--- a/hw/usb/dev-hub.c
+++ b/hw/usb/dev-hub.c
@@ -184,6 +184,7 @@ static void usb_hub_detach(USBPort *port1)
         port->wPortStatus &= ~PORT_STAT_ENABLE;
         port->wPortChange |= PORT_STAT_C_ENABLE;
     }
+    usb_wakeup(s->intr);
 }
 
 static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
@@ -363,6 +364,7 @@ static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
                     port->wPortChange |= PORT_STAT_C_RESET;
                     /* set enable bit */
                     port->wPortStatus |= PORT_STAT_ENABLE;
+                    usb_wakeup(s->intr);
                 }
                 break;
             case PORT_POWER:
diff --git a/hw/usb/dev-network.c b/hw/usb/dev-network.c
index 14d9e5a..30cb033 100644
--- a/hw/usb/dev-network.c
+++ b/hw/usb/dev-network.c
@@ -639,6 +639,8 @@ typedef struct USBNetState {
     unsigned int in_ptr, in_len;
     uint8_t in_buf[2048];
 
+    USBEndpoint *intr;
+
     char usbstring_mac[13];
     NICState *nic;
     NICConf conf;
@@ -851,6 +853,10 @@ static void *rndis_queue_response(USBNetState *s, unsigned int length)
     struct rndis_response *r =
             g_malloc0(sizeof(struct rndis_response) + length);
 
+    if (QTAILQ_EMPTY(&s->rndis_resp)) {
+        usb_wakeup(s->intr);
+    }
+
     QTAILQ_INSERT_TAIL(&s->rndis_resp, r, entries);
     r->length = length;
 
@@ -1349,6 +1355,7 @@ static int usb_net_initfn(USBDevice *dev)
     s->media_state = 0;	/* NDIS_MEDIA_STATE_CONNECTED */;
     s->filter = 0;
     s->vendorid = 0x1234;
+    s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
 
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
     s->nic = qemu_new_nic(&net_usbnet_info, &s->conf,
diff --git a/hw/usb/dev-wacom.c b/hw/usb/dev-wacom.c
index 08b416d..f7342b0 100644
--- a/hw/usb/dev-wacom.c
+++ b/hw/usb/dev-wacom.c
@@ -43,6 +43,7 @@
 
 typedef struct USBWacomState {
     USBDevice dev;
+    USBEndpoint *intr;
     QEMUPutMouseEntry *eh_entry;
     int dx, dy, dz, buttons_state;
     int x, y;
@@ -137,6 +138,7 @@ static void usb_mouse_event(void *opaque,
     s->dz += dz1;
     s->buttons_state = buttons_state;
     s->changed = 1;
+    usb_wakeup(s->intr);
 }
 
 static void usb_wacom_event(void *opaque,
@@ -150,6 +152,7 @@ static void usb_wacom_event(void *opaque,
     s->dz += dz;
     s->buttons_state = buttons_state;
     s->changed = 1;
+    usb_wakeup(s->intr);
 }
 
 static inline int int_clamp(int val, int vmin, int vmax)
@@ -337,6 +340,7 @@ static int usb_wacom_initfn(USBDevice *dev)
     USBWacomState *s = DO_UPCAST(USBWacomState, dev, dev);
     usb_desc_create_serial(dev);
     usb_desc_init(dev);
+    s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
     s->changed = 1;
     return 0;
 }
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index 490c90f..9e7f645 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1644,6 +1644,10 @@ static void usbredir_interrupt_packet(void *priv, uint64_t id,
             return;
         }
 
+        if (QTAILQ_EMPTY(&dev->endpoint[EP2I(ep)].bufpq)) {
+            usb_wakeup(usb_ep_get(&dev->dev, USB_TOKEN_IN, ep & 0x0f));
+        }
+
         /* bufp_alloc also adds the packet to the ep queue */
         bufp_alloc(dev, data, data_len, interrupt_packet->status, ep);
     } else {
-- 
1.7.1