usb: improve packet state sanity checks
Add a new function to check whenever the packet state is as expected, log more informations in case it isn't. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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86e18cae20
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5ac2731cf8
1
hw/usb.h
1
hw/usb.h
@ -336,6 +336,7 @@ struct USBPacket {
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void usb_packet_init(USBPacket *p);
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void usb_packet_init(USBPacket *p);
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void usb_packet_set_state(USBPacket *p, USBPacketState state);
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void usb_packet_set_state(USBPacket *p, USBPacketState state);
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void usb_packet_check_state(USBPacket *p, USBPacketState expected);
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void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep);
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void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep);
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void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len);
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void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len);
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int usb_packet_map(USBPacket *p, QEMUSGList *sgl);
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int usb_packet_map(USBPacket *p, QEMUSGList *sgl);
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@ -378,7 +378,7 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p)
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}
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}
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assert(dev == p->ep->dev);
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assert(dev == p->ep->dev);
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assert(dev->state == USB_STATE_DEFAULT);
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assert(dev->state == USB_STATE_DEFAULT);
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assert(p->state == USB_PACKET_SETUP);
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usb_packet_check_state(p, USB_PACKET_SETUP);
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assert(p->ep != NULL);
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assert(p->ep != NULL);
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if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline) {
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if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline) {
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@ -406,7 +406,7 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p)
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USBEndpoint *ep = p->ep;
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USBEndpoint *ep = p->ep;
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int ret;
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int ret;
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assert(p->state == USB_PACKET_ASYNC);
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usb_packet_check_state(p, USB_PACKET_ASYNC);
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assert(QTAILQ_FIRST(&ep->queue) == p);
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assert(QTAILQ_FIRST(&ep->queue) == p);
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usb_packet_set_state(p, USB_PACKET_COMPLETE);
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usb_packet_set_state(p, USB_PACKET_COMPLETE);
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QTAILQ_REMOVE(&ep->queue, p, queue);
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QTAILQ_REMOVE(&ep->queue, p, queue);
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@ -417,7 +417,7 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p)
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if (p->state == USB_PACKET_ASYNC) {
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if (p->state == USB_PACKET_ASYNC) {
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break;
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break;
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}
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}
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assert(p->state == USB_PACKET_QUEUED);
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usb_packet_check_state(p, USB_PACKET_QUEUED);
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ret = usb_process_one(p);
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ret = usb_process_one(p);
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if (ret == USB_RET_ASYNC) {
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if (ret == USB_RET_ASYNC) {
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usb_packet_set_state(p, USB_PACKET_ASYNC);
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usb_packet_set_state(p, USB_PACKET_ASYNC);
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@ -450,7 +450,7 @@ void usb_packet_init(USBPacket *p)
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qemu_iovec_init(&p->iov, 1);
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qemu_iovec_init(&p->iov, 1);
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}
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}
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void usb_packet_set_state(USBPacket *p, USBPacketState state)
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static const char *usb_packet_state_name(USBPacketState state)
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{
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{
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static const char *name[] = {
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static const char *name[] = {
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[USB_PACKET_UNDEFINED] = "undef",
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[USB_PACKET_UNDEFINED] = "undef",
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@ -460,11 +460,36 @@ void usb_packet_set_state(USBPacket *p, USBPacketState state)
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[USB_PACKET_COMPLETE] = "complete",
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[USB_PACKET_COMPLETE] = "complete",
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[USB_PACKET_CANCELED] = "canceled",
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[USB_PACKET_CANCELED] = "canceled",
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};
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};
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if (state < ARRAY_SIZE(name)) {
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return name[state];
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}
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return "INVALID";
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}
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void usb_packet_check_state(USBPacket *p, USBPacketState expected)
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{
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USBDevice *dev;
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USBBus *bus;
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if (p->state == expected) {
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return;
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}
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dev = p->ep->dev;
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bus = usb_bus_from_device(dev);
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trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p,
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usb_packet_state_name(p->state),
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usb_packet_state_name(expected));
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assert(!"usb packet state check failed");
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}
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void usb_packet_set_state(USBPacket *p, USBPacketState state)
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{
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USBDevice *dev = p->ep->dev;
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USBDevice *dev = p->ep->dev;
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USBBus *bus = usb_bus_from_device(dev);
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USBBus *bus = usb_bus_from_device(dev);
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trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr,
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trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p,
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p, name[p->state], name[state]);
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usb_packet_state_name(p->state),
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usb_packet_state_name(state));
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p->state = state;
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p->state = state;
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}
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}
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@ -229,6 +229,7 @@ sun4m_iommu_bad_addr(uint64_t addr) "bad addr %"PRIx64
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# hw/usb/core.c
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# hw/usb/core.c
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usb_packet_state_change(int bus, const char *port, int ep, void *p, const char *o, const char *n) "bus %d, port %s, ep %d, packet %p, state %s -> %s"
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usb_packet_state_change(int bus, const char *port, int ep, void *p, const char *o, const char *n) "bus %d, port %s, ep %d, packet %p, state %s -> %s"
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usb_packet_state_fault(int bus, const char *port, int ep, void *p, const char *o, const char *n) "bus %d, port %s, ep %d, packet %p, state %s, expected %s"
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# hw/usb/bus.c
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# hw/usb/bus.c
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usb_port_claim(int bus, const char *port) "bus %d, port %s"
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usb_port_claim(int bus, const char *port) "bus %d, port %s"
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