[Qemu-devel] [PATCH 15/28] usb: kill handle_packet callback

[Gerd Hoffmann <kraxel@redhat.com>]

All drivers except usb-hub use usb_generic_handle_packet.  The only
reason the usb hub has its own function is that it used to be called
with packets which are intended for downstream devices.  With the new,
separate device lookup step this doesn't happen any more, so the need
for a different handle_packet callback is gone.

So we can kill the handle_packet callback and just call
usb_generic_handle_packet directly.  The special hub handling in
usb_handle_packet() can go away for the same reason.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb-audio.c  |    1 -
 hw/usb-bt.c     |    1 -
 hw/usb-bus.c    |    9 ---------
 hw/usb-ccid.c   |    1 -
 hw/usb-hid.c    |    1 -
 hw/usb-hub.c    |   39 ---------------------------------------
 hw/usb-msd.c    |    1 -
 hw/usb-net.c    |    1 -
 hw/usb-serial.c |    2 --
 hw/usb-wacom.c  |    1 -
 hw/usb.c        |   15 ++++-----------
 hw/usb.h        |   12 ------------
 usb-bsd.c       |    1 -
 usb-linux.c     |    1 -
 usb-redir.c     |    1 -
 15 files changed, 4 insertions(+), 83 deletions(-)

diff --git a/hw/usb-audio.c b/hw/usb-audio.c
index cd589b7..a4ea0b0 100644
--- a/hw/usb-audio.c
+++ b/hw/usb-audio.c
@@ -691,7 +691,6 @@ static void usb_audio_class_init(ObjectClass *klass, void *data)
     k->product_desc   = "QEMU USB Audio Interface";
     k->usb_desc       = &desc_audio;
     k->init           = usb_audio_initfn;
-    k->handle_packet  = usb_generic_handle_packet;
     k->handle_reset   = usb_audio_handle_reset;
     k->handle_control = usb_audio_handle_control;
     k->handle_data    = usb_audio_handle_data;
diff --git a/hw/usb-bt.c b/hw/usb-bt.c
index 90c3b0e..58b247e 100644
--- a/hw/usb-bt.c
+++ b/hw/usb-bt.c
@@ -535,7 +535,6 @@ static void usb_bt_class_initfn(ObjectClass *klass, void *data)
     uc->init           = usb_bt_initfn;
     uc->product_desc   = "QEMU BT dongle";
     uc->usb_desc       = &desc_bluetooth;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_bt_handle_reset;
     uc->handle_control = usb_bt_handle_control;
     uc->handle_data    = usb_bt_handle_data;
diff --git a/hw/usb-bus.c b/hw/usb-bus.c
index 5c05ed5..e907d0d 100644
--- a/hw/usb-bus.c
+++ b/hw/usb-bus.c
@@ -91,15 +91,6 @@ static void usb_device_handle_destroy(USBDevice *dev)
     }
 }
 
-int usb_device_handle_packet(USBDevice *dev, USBPacket *p)
-{
-    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
-    if (klass->handle_packet) {
-        return klass->handle_packet(dev, p);
-    }
-    return -ENOSYS;
-}
-
 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
 {
     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
diff --git a/hw/usb-ccid.c b/hw/usb-ccid.c
index 881da30..b3bcfeb 100644
--- a/hw/usb-ccid.c
+++ b/hw/usb-ccid.c
@@ -1320,7 +1320,6 @@ static void ccid_class_initfn(ObjectClass *klass, void *data)
     uc->init           = ccid_initfn;
     uc->product_desc   = "QEMU USB CCID";
     uc->usb_desc       = &desc_ccid;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = ccid_handle_reset;
     uc->handle_control = ccid_handle_control;
     uc->handle_data    = ccid_handle_data;
diff --git a/hw/usb-hid.c b/hw/usb-hid.c
index 3c4e45d..c648980 100644
--- a/hw/usb-hid.c
+++ b/hw/usb-hid.c
@@ -557,7 +557,6 @@ static void usb_hid_class_initfn(ObjectClass *klass, void *data)
 {
     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_hid_handle_reset;
     uc->handle_control = usb_hid_handle_control;
     uc->handle_data    = usb_hid_handle_data;
diff --git a/hw/usb-hub.c b/hw/usb-hub.c
index bd7641c..2256256 100644
--- a/hw/usb-hub.c
+++ b/hw/usb-hub.c
@@ -455,44 +455,6 @@ static int usb_hub_handle_data(USBDevice *dev, USBPacket *p)
     return ret;
 }
 
-static int usb_hub_broadcast_packet(USBHubState *s, USBPacket *p)
-{
-    USBHubPort *port;
-    USBDevice *dev;
-    int i, ret;
-
-    for(i = 0; i < NUM_PORTS; i++) {
-        port = &s->ports[i];
-        dev = port->port.dev;
-        if (dev && dev->attached && (port->wPortStatus & PORT_STAT_ENABLE)) {
-            ret = usb_handle_packet(dev, p);
-            if (ret != USB_RET_NODEV) {
-                return ret;
-            }
-        }
-    }
-    return USB_RET_NODEV;
-}
-
-static int usb_hub_handle_packet(USBDevice *dev, USBPacket *p)
-{
-    USBHubState *s = (USBHubState *)dev;
-
-#if defined(DEBUG) && 0
-    printf("usb_hub: pid=0x%x\n", pid);
-#endif
-    if (dev->state == USB_STATE_DEFAULT &&
-        dev->addr != 0 &&
-        p->devaddr != dev->addr &&
-        (p->pid == USB_TOKEN_SETUP ||
-         p->pid == USB_TOKEN_OUT ||
-         p->pid == USB_TOKEN_IN)) {
-        /* broadcast the packet to the devices */
-        return usb_hub_broadcast_packet(s, p);
-    }
-    return usb_generic_handle_packet(dev, p);
-}
-
 static void usb_hub_handle_destroy(USBDevice *dev)
 {
     USBHubState *s = (USBHubState *)dev;
@@ -562,7 +524,6 @@ static void usb_hub_class_initfn(ObjectClass *klass, void *data)
     uc->product_desc   = "QEMU USB Hub";
     uc->usb_desc       = &desc_hub;
     uc->find_device    = usb_hub_find_device;
-    uc->handle_packet  = usb_hub_handle_packet;
     uc->handle_reset   = usb_hub_handle_reset;
     uc->handle_control = usb_hub_handle_control;
     uc->handle_data    = usb_hub_handle_data;
diff --git a/hw/usb-msd.c b/hw/usb-msd.c
index 6153376..c34cad5 100644
--- a/hw/usb-msd.c
+++ b/hw/usb-msd.c
@@ -651,7 +651,6 @@ static void usb_msd_class_initfn(ObjectClass *klass, void *data)
     uc->init           = usb_msd_initfn;
     uc->product_desc   = "QEMU USB MSD";
     uc->usb_desc       = &desc;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->cancel_packet  = usb_msd_cancel_io;
     uc->handle_attach  = usb_desc_attach;
     uc->handle_reset   = usb_msd_handle_reset;
diff --git a/hw/usb-net.c b/hw/usb-net.c
index e211141..f00e854 100644
--- a/hw/usb-net.c
+++ b/hw/usb-net.c
@@ -1398,7 +1398,6 @@ static void usb_net_class_initfn(ObjectClass *klass, void *data)
     uc->init           = usb_net_initfn;
     uc->product_desc   = "QEMU USB Network Interface";
     uc->usb_desc       = &desc_net;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_net_handle_reset;
     uc->handle_control = usb_net_handle_control;
     uc->handle_data    = usb_net_handle_data;
diff --git a/hw/usb-serial.c b/hw/usb-serial.c
index c2cb6d2..cf83cf2 100644
--- a/hw/usb-serial.c
+++ b/hw/usb-serial.c
@@ -583,7 +583,6 @@ static void usb_serial_class_initfn(ObjectClass *klass, void *data)
     uc->init = usb_serial_initfn;
     uc->product_desc   = "QEMU USB Serial";
     uc->usb_desc       = &desc_serial;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_serial_handle_reset;
     uc->handle_control = usb_serial_handle_control;
     uc->handle_data    = usb_serial_handle_data;
@@ -612,7 +611,6 @@ static void usb_braille_class_initfn(ObjectClass *klass, void *data)
     uc->init           = usb_serial_initfn;
     uc->product_desc   = "QEMU USB Braille";
     uc->usb_desc       = &desc_braille;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_serial_handle_reset;
     uc->handle_control = usb_serial_handle_control;
     uc->handle_data    = usb_serial_handle_data;
diff --git a/hw/usb-wacom.c b/hw/usb-wacom.c
index 14de14d..46b8010 100644
--- a/hw/usb-wacom.c
+++ b/hw/usb-wacom.c
@@ -357,7 +357,6 @@ static void usb_wacom_class_init(ObjectClass *klass, void *data)
     uc->product_desc   = "QEMU PenPartner Tablet";
     uc->usb_desc       = &desc_wacom;
     uc->init           = usb_wacom_initfn;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_wacom_handle_reset;
     uc->handle_control = usb_wacom_handle_control;
     uc->handle_data    = usb_wacom_handle_data;
diff --git a/hw/usb.c b/hw/usb.c
index 9976f81..638a339 100644
--- a/hw/usb.c
+++ b/hw/usb.c
@@ -227,7 +227,7 @@ static int do_token_out(USBDevice *s, USBPacket *p)
  *
  * Returns length of the transaction or one of the USB_RET_XXX codes.
  */
-int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
+static int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
 {
     /* Rest of the PIDs must match our address */
     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
@@ -318,18 +318,12 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p)
     if (dev == NULL) {
         return USB_RET_NODEV;
     }
+    assert(dev->addr == p->devaddr);
 
     assert(p->owner == NULL);
-    ret = usb_device_handle_packet(dev, p);
+    ret = usb_generic_handle_packet(dev, p);
     if (ret == USB_RET_ASYNC) {
-        if (p->owner == NULL) {
-            p->owner = usb_ep_get(dev, p->pid, p->devep);
-        } else {
-            /* We'll end up here when usb_handle_packet is called
-             * recursively due to a hub being in the chain.  Nothing
-             * to do.  Leave p->owner pointing to the device, not the
-             * hub. */;
-        }
+        p->owner = usb_ep_get(dev, p->pid, p->devep);
     }
     return ret;
 }
@@ -339,7 +333,6 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p)
    handle_packet. */
 void usb_packet_complete(USBDevice *dev, USBPacket *p)
 {
-    /* Note: p->owner != dev is possible in case dev is a hub */
     assert(p->owner != NULL);
     p->owner = NULL;
     dev->port->ops->complete(dev->port, p);
diff --git a/hw/usb.h b/hw/usb.h
index 1beb4b3..294c33d 100644
--- a/hw/usb.h
+++ b/hw/usb.h
@@ -235,15 +235,6 @@ typedef struct USBDeviceClass {
     USBDevice *(*find_device)(USBDevice *dev, uint8_t addr);
 
     /*
-     * Process USB packet.
-     * Called by the HC (Host Controller).
-     *
-     * Returns length of the transaction
-     * or one of the USB_RET_XXX codes.
-     */
-    int (*handle_packet)(USBDevice *dev, USBPacket *p);
-
-    /*
      * Called when a packet is canceled.
      */
     void (*cancel_packet)(USBDevice *dev, USBPacket *p);
@@ -360,7 +351,6 @@ void usb_detach(USBPort *port);
 void usb_port_reset(USBPort *port);
 void usb_device_reset(USBDevice *dev);
 void usb_wakeup(USBDevice *dev);
-int usb_generic_handle_packet(USBDevice *s, USBPacket *p);
 void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p);
 int set_usb_string(uint8_t *buf, const char *str);
 
@@ -456,8 +446,6 @@ extern const VMStateDescription vmstate_usb_device;
 
 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr);
 
-int usb_device_handle_packet(USBDevice *dev, USBPacket *p);
-
 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p);
 
 void usb_device_handle_attach(USBDevice *dev);
diff --git a/usb-bsd.c b/usb-bsd.c
index fc722b3..ca9a1bd 100644
--- a/usb-bsd.c
+++ b/usb-bsd.c
@@ -403,7 +403,6 @@ static void usb_host_class_initfn(ObjectClass *klass, void *data)
 
     uc->product_desc   = "USB Host Device";
     uc->init           = usb_host_initfn;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->handle_reset   = usb_host_handle_reset;
     uc->handle_control = usb_host_handle_control;
     uc->handle_data    = usb_host_handle_data;
diff --git a/usb-linux.c b/usb-linux.c
index e7fc9ec..afb13c4 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -1419,7 +1419,6 @@ static void usb_host_class_initfn(ObjectClass *klass, void *data)
 
     uc->init           = usb_host_initfn;
     uc->product_desc   = "USB Host Device";
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->cancel_packet  = usb_host_async_cancel;
     uc->handle_data    = usb_host_handle_data;
     uc->handle_control = usb_host_handle_control;
diff --git a/usb-redir.c b/usb-redir.c
index 0a92951..d2769a8 100644
--- a/usb-redir.c
+++ b/usb-redir.c
@@ -1424,7 +1424,6 @@ static void usbredir_class_initfn(ObjectClass *klass, void *data)
     uc->init           = usbredir_initfn;
     uc->product_desc   = "USB Redirection Device";
     uc->handle_destroy = usbredir_handle_destroy;
-    uc->handle_packet  = usb_generic_handle_packet;
     uc->cancel_packet  = usbredir_cancel_packet;
     uc->handle_reset   = usbredir_handle_reset;
     uc->handle_data    = usbredir_handle_data;
-- 
1.7.1