make qemu_queue_{cancel,reset} return the number of packets released,
so the caller can figure whenever there have been active packets even
though there shouldn't have been any. Add tracepoint to log this.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
hw/usb/hcd-ehci.c | 26 ++++++++++++++++++++------
trace-events | 1 +
2 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 23221d0..4564615 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -716,6 +716,12 @@ static void ehci_trace_sitd(EHCIState *s,
target_phys_addr_t addr,
(bool)(sitd->results & SITD_RESULTS_ACTIVE));
}
+static void ehci_trace_guest_bug(EHCIState *s, const char *message)
+{
+ trace_usb_ehci_guest_bug(message);
+ fprintf(stderr, "ehci warning: %s\n", message);
+}
+
static inline bool ehci_enabled(EHCIState *s)
{
return s->usbcmd & USBCMD_RUNSTOP;
@@ -785,27 +791,33 @@ static EHCIQueue *ehci_alloc_queue(EHCIState *ehci,
uint32_t addr, int async)
return q;
}
-static void ehci_cancel_queue(EHCIQueue *q)
+static int ehci_cancel_queue(EHCIQueue *q)
{
EHCIPacket *p;
+ int packets = 0;
p = QTAILQ_FIRST(&q->packets);
if (p == NULL) {
- return;
+ return 0;
}
trace_usb_ehci_queue_action(q, "cancel");
do {
ehci_free_packet(p);
+ packets++;
} while ((p = QTAILQ_FIRST(&q->packets)) != NULL);
+ return packets;
}
-static void ehci_reset_queue(EHCIQueue *q)
+static int ehci_reset_queue(EHCIQueue *q)
{
+ int packets;
+
trace_usb_ehci_queue_action(q, "reset");
- ehci_cancel_queue(q);
+ packets = ehci_cancel_queue(q);
q->dev = NULL;
q->qtdaddr = 0;
+ return packets;
}
static void ehci_free_queue(EHCIQueue *q)
@@ -1817,7 +1829,9 @@ static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int
async)
(memcmp(&qh.current_qtd, &q->qh.current_qtd,
9 * sizeof(uint32_t)) != 0) ||
(q->dev != NULL && q->dev->addr != devaddr)) {
- ehci_reset_queue(q);
+ if (ehci_reset_queue(q) > 0) {
+ ehci_trace_guest_bug(ehci, "guest updated active QH");
+ }
p = NULL;
}
q->qh = qh;
@@ -1979,8 +1993,8 @@ static int ehci_state_fetchqtd(EHCIQueue *q)
(!NLPTR_TBIT(p->qtd.next) && (p->qtd.next != qtd.next)) ||
(!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext != qtd.altnext)) ||
p->qtd.bufptr[0] != qtd.bufptr[0]) {
- /* guest bug: guest updated active QH or qTD underneath us */
ehci_cancel_queue(q);
+ ehci_trace_guest_bug(q->ehci, "guest updated active QH or qTD");
p = NULL;
} else {
p->qtd = qtd;
diff --git a/trace-events b/trace-events
index 04b0723..0c7ffc7 100644
--- a/trace-events
+++ b/trace-events
@@ -263,6 +263,7 @@ usb_ehci_data(int rw, uint32_t cpage, uint32_t offset,
uint32_t addr, uint32_t l
usb_ehci_queue_action(void *q, const char *action) "q %p: %s"
usb_ehci_packet_action(void *q, void *p, const char *action) "q %p p %p: %s"
usb_ehci_irq(uint32_t level, uint32_t frindex, uint32_t sts, uint32_t mask)
"level %d, frindex 0x%04x, sts 0x%x, mask 0x%x"
+usb_ehci_guest_bug(const char *reason) "%s"
# hw/usb/hcd-uhci.c
usb_uhci_reset(void) "=== RESET ==="
--
1.7.1
