[Qemu-devel] [PATCH 6/7] usb-hcd-xhci: Report completion of active transfer with CC_STOPPED on ep stop

[Gerd Hoffmann <kraxel@redhat.com>]

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

As we should per the XHCI spec "4.6.9 Stop Endpoint".

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb/hcd-xhci.c | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 7cf89ce..0131151 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -505,6 +505,7 @@ static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid,
                          unsigned int epid, unsigned int streamid);
 static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
                                 unsigned int epid);
+static void xhci_xfer_report(XHCITransfer *xfer);
 static void xhci_event(XHCIState *xhci, XHCIEvent *event, int v);
 static void xhci_write_event(XHCIState *xhci, XHCIEvent *event, int v);
 static USBEndpoint *xhci_epid_to_usbep(XHCIState *xhci,
@@ -1302,10 +1303,15 @@ static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
     return CC_SUCCESS;
 }
 
-static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
+static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report)
 {
     int killed = 0;
 
+    if (report && (t->running_async || t->running_retry)) {
+        t->status = report;
+        xhci_xfer_report(t);
+    }
+
     if (t->running_async) {
         usb_cancel_packet(&t->packet);
         t->running_async = 0;
@@ -1318,6 +1324,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
             timer_del(epctx->kick_timer);
         }
         t->running_retry = 0;
+        killed = 1;
     }
     if (t->trbs) {
         g_free(t->trbs);
@@ -1330,7 +1337,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
 }
 
 static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
-                               unsigned int epid)
+                               unsigned int epid, TRBCCode report)
 {
     XHCISlot *slot;
     XHCIEPContext *epctx;
@@ -1351,7 +1358,10 @@ static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
 
     xferi = epctx->next_xfer;
     for (i = 0; i < TD_QUEUE; i++) {
-        killed += xhci_ep_nuke_one_xfer(&epctx->transfers[xferi]);
+        killed += xhci_ep_nuke_one_xfer(&epctx->transfers[xferi], report);
+        if (killed) {
+            report = 0; /* Only report once */
+        }
         epctx->transfers[xferi].packet.ep = NULL;
         xferi = (xferi + 1) % TD_QUEUE;
     }
@@ -1381,7 +1391,7 @@ static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
         return CC_SUCCESS;
     }
 
-    xhci_ep_nuke_xfers(xhci, slotid, epid);
+    xhci_ep_nuke_xfers(xhci, slotid, epid, 0);
 
     epctx = slot->eps[epid-1];
 
@@ -1423,7 +1433,7 @@ static TRBCCode xhci_stop_ep(XHCIState *xhci, unsigned int slotid,
         return CC_EP_NOT_ENABLED_ERROR;
     }
 
-    if (xhci_ep_nuke_xfers(xhci, slotid, epid) > 0) {
+    if (xhci_ep_nuke_xfers(xhci, slotid, epid, CC_STOPPED) > 0) {
         fprintf(stderr, "xhci: FIXME: endpoint stopped w/ xfers running, "
                 "data might be lost\n");
     }
@@ -1468,7 +1478,7 @@ static TRBCCode xhci_reset_ep(XHCIState *xhci, unsigned int slotid,
         return CC_CONTEXT_STATE_ERROR;
     }
 
-    if (xhci_ep_nuke_xfers(xhci, slotid, epid) > 0) {
+    if (xhci_ep_nuke_xfers(xhci, slotid, epid, 0) > 0) {
         fprintf(stderr, "xhci: FIXME: endpoint reset w/ xfers running, "
                 "data might be lost\n");
     }
@@ -2461,7 +2471,7 @@ static void xhci_detach_slot(XHCIState *xhci, USBPort *uport)
 
     for (ep = 0; ep < 31; ep++) {
         if (xhci->slots[slot].eps[ep]) {
-            xhci_ep_nuke_xfers(xhci, slot+1, ep+1);
+            xhci_ep_nuke_xfers(xhci, slot + 1, ep + 1, 0);
         }
     }
     xhci->slots[slot].uport = NULL;
@@ -3276,7 +3286,7 @@ static void xhci_complete(USBPort *port, USBPacket *packet)
     XHCITransfer *xfer = container_of(packet, XHCITransfer, packet);
 
     if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
-        xhci_ep_nuke_one_xfer(xfer);
+        xhci_ep_nuke_one_xfer(xfer, 0);
         return;
     }
     xhci_complete_packet(xfer);
-- 
1.8.3.1