MFC r208014

 Back out r203140 which was causing problems when the first and the last
 microframe slot was not in the smask. The problem was that the EHCI driver was
 then thinking that the transfer was immediately complete in some cases. Which
 could lead to freeze-like situations, which can be recovered by unplugging the
 USB device.

1 files changed, 20 insertions, 9 deletions

diff --git a/sys/dev/usb/controller/ehci.c b/sys/dev/usb/controller/ehci.c
index 12cfe53..6f22c0a 100644
--- a/sys/dev/usb/controller/ehci.c
+++ b/sys/dev/usb/controller/ehci.c
@@ -1352,22 +1352,32 @@ ehci_check_transfer(struct usb_xfer *xfer)
 		}
 	} else if (methods == &ehci_device_isoc_hs_methods) {
 		ehci_itd_t *td;
-		uint8_t n = (xfer->nframes & 7);
 
 		/* isochronous high speed transfer */
 
 		/* check last transfer */
 		td = xfer->td_transfer_last;
 		usb_pc_cpu_invalidate(td->page_cache);
-		if (n == 0)
-			status = td->itd_status[7];
-		else
-			status = td->itd_status[n-1];
+		status = td->itd_status[0];
+		status |= td->itd_status[1];
+		status |= td->itd_status[2];
+		status |= td->itd_status[3];
+		status |= td->itd_status[4];
+		status |= td->itd_status[5];
+		status |= td->itd_status[6];
+		status |= td->itd_status[7];
 
 		/* also check first transfer */
 		td = xfer->td_transfer_first;
 		usb_pc_cpu_invalidate(td->page_cache);
 		status |= td->itd_status[0];
+		status |= td->itd_status[1];
+		status |= td->itd_status[2];
+		status |= td->itd_status[3];
+		status |= td->itd_status[4];
+		status |= td->itd_status[5];
+		status |= td->itd_status[6];
+		status |= td->itd_status[7];
 
 		/* if no transactions are active we continue */
 		if (!(status & htohc32(sc, EHCI_ITD_ACTIVE))) {
@@ -2799,14 +2809,15 @@ ehci_device_isoc_hs_enter(struct usb_xfer *xfer)
 	uint8_t x;
 	uint8_t td_no;
 	uint8_t page_no;
+	uint8_t shift = usbd_xfer_get_fps_shift(xfer);
 
 #ifdef USB_DEBUG
 	uint8_t once = 1;
 
 #endif
 
-	DPRINTFN(6, "xfer=%p next=%d nframes=%d\n",
-	    xfer, xfer->endpoint->isoc_next, xfer->nframes);
+	DPRINTFN(6, "xfer=%p next=%d nframes=%d shift=%d\n",
+	    xfer, xfer->endpoint->isoc_next, xfer->nframes, (int)shift);
 
 	/* get the current frame index */
 
@@ -2820,7 +2831,7 @@ ehci_device_isoc_hs_enter(struct usb_xfer *xfer)
 	    (EHCI_VIRTUAL_FRAMELIST_COUNT - 1);
 
 	if ((xfer->endpoint->is_synced == 0) ||
-	    (buf_offset < ((xfer->nframes + 7) / 8))) {
+	    (buf_offset < (((xfer->nframes << shift) + 7) / 8))) {
 		/*
 		 * If there is data underflow or the pipe queue is empty we
 		 * schedule the transfer a few frames ahead of the current
@@ -2844,7 +2855,7 @@ ehci_device_isoc_hs_enter(struct usb_xfer *xfer)
 	 */
 	xfer->isoc_time_complete =
 	    usb_isoc_time_expand(&sc->sc_bus, nframes) + buf_offset +
-	    ((xfer->nframes + 7) / 8);
+	    (((xfer->nframes << shift) + 7) / 8);
 
 	/* get the real number of frames */