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Fix the error check on completion of an xfer. Just because the qTD status 

field has error bits set doesn't mean there has been an error, unless the
HALTED bit is set as well.  The old behaviour could result in a transfer
being considered failed by the software, but a success by the device.
This seems to have affected mostly mass storage devices.

Pointed out by Dan Ellis in kern/29731.
This commit is contained in:
augustss 2005-05-01 19:24:39 +00:00
parent 521e1394ad
commit 6aae573fe5
2 changed files with 23 additions and 14 deletions
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33
sys/dev/usb/ehci.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ehci.c,v 1.97 2005/05/01 14:21:27 augustss Exp $ */
/* $NetBSD: ehci.c,v 1.98 2005/05/01 19:24:39 augustss Exp $ */
/*
* Copyright (c) 2004 The NetBSD Foundation, Inc.
@ -65,7 +65,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.97 2005/05/01 14:21:27 augustss Exp $");
__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.98 2005/05/01 19:24:39 augustss Exp $");
#include "ohci.h"
#include "uhci.h"
@ -809,10 +809,6 @@ ehci_idone(struct ehci_xfer *ex)
break;
status = nstatus;
/* halt is ok if descriptor is last, and complete */
if (sqtd->qtd.qtd_next == EHCI_NULL &&
EHCI_QTD_GET_BYTES(status) == 0)
status &= ~EHCI_QTD_HALTED;
if (EHCI_QTD_GET_PID(status) != EHCI_QTD_PID_SETUP)
actlen += sqtd->len - EHCI_QTD_GET_BYTES(status);
}
@ -840,20 +836,18 @@ ehci_idone(struct ehci_xfer *ex)
UGETW(xfer->pipe->endpoint->edesc->wMaxPacketSize);
epipe->nexttoggle ^= pkts_left % 2;
status &= EHCI_QTD_STATERRS;
DPRINTFN(/*10*/2, ("ehci_idone: len=%d, actlen=%d, status=0x%x\n",
xfer->length, actlen, status));
xfer->actlen = actlen;
if (status != 0) {
if (status & EHCI_QTD_HALTED) {
#ifdef EHCI_DEBUG
char sbuf[128];
bitmask_snprintf((u_int32_t)status,
"\20\7HALTED\6BUFERR\5BABBLE\4XACTERR"
"\3MISSED", sbuf, sizeof(sbuf));
"\3MISSED\1PINGSTATE", sbuf, sizeof(sbuf));
DPRINTFN((status == EHCI_QTD_HALTED) ? 2 : 0,
("ehci_idone: error, addr=%d, endpt=0x%02x, "
DPRINTFN(2, ("ehci_idone: error, addr=%d, endpt=0x%02x, "
"status 0x%s\n",
xfer->pipe->device->address,
xfer->pipe->endpoint->edesc->bEndpointAddress,
@ -863,10 +857,25 @@ ehci_idone(struct ehci_xfer *ex)
ehci_dump_sqtds(ex->sqtdstart);
}
#endif
if (status == EHCI_QTD_HALTED)
/* low&full speed has an extra error flag */
if (EHCI_QH_GET_EPS(epipe->sqh->qh.qh_endp) !=
EHCI_QH_SPEED_HIGH)
status &= EHCI_QTD_STATERRS | EHCI_QTD_PINGSTATE;
else
status &= EHCI_QTD_STATERRS;
if (status == 0) /* no other errors means a stall */
xfer->status = USBD_STALLED;
else
xfer->status = USBD_IOERROR; /* more info XXX */
/* XXX need to reset TT on missed microframe */
if (status & EHCI_QTD_MISSEDMICRO) {
ehci_softc_t *sc = (ehci_softc_t *)
xfer->pipe->device->bus;
printf("%s: missed microframe, TT reset not "
"implemented, hub might be inoperational\n",
USBDEVNAME(sc->sc_bus.bdev));
}
} else {
xfer->status = USBD_NORMAL_COMPLETION;
}

4
sys/dev/usb/ehcireg.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: ehcireg.h,v 1.20 2005/03/02 11:37:27 mycroft Exp $ */
/* $NetBSD: ehcireg.h,v 1.21 2005/05/01 19:24:39 augustss Exp $ */
/*
* Copyright (c) 2001, 2004 The NetBSD Foundation, Inc.
@ -215,7 +215,7 @@ typedef struct {
#define EHCI_QTD_MISSEDMICRO 0x04
#define EHCI_QTD_SPLITXSTATE 0x02
#define EHCI_QTD_PINGSTATE 0x01
#define EHCI_QTD_STATERRS 0x7c
#define EHCI_QTD_STATERRS 0x3c
#define EHCI_QTD_GET_PID(x) (((x) >> 8) & 0x3)
#define EHCI_QTD_SET_PID(x) ((x) << 8)
#define EHCI_QTD_PID_OUT 0x0