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freebsd-dev/sys/dev/usb/net/if_cdce.c
Hans Petter Selasky 7e05daae8f USB network (NCM driver): 
- correct the ethernet payload remainder which
must be post-offseted by -14 bytes instead of
0 bytes. This is not very clearly defined in the
NCM specification.
- add development feature about limiting the
maximum datagram count in each NCM payload.
- zero-pad alignment data
- add TX-interval tuning sysctl

Approved by:    thompsa (mentor)
2010-10-13 22:04:55 +00:00

1413 lines
36 KiB
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/* $NetBSD: if_cdce.c,v 1.4 2004/10/24 12:50:54 augustss Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999, 2000-2003 Bill Paul <wpaul@windriver.com>
* Copyright (c) 2003-2005 Craig Boston
* Copyright (c) 2004 Daniel Hartmeier
* Copyright (c) 2009 Hans Petter Selasky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul, THE VOICES IN HIS HEAD OR
* THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* USB Communication Device Class (Ethernet Networking Control Model)
* http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
*/
/*
* USB Network Control Model (NCM)
* http://www.usb.org/developers/devclass_docs/NCM10.zip
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker_set.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usb_cdc.h>
#include "usbdevs.h"
#define USB_DEBUG_VAR cdce_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
#include "usb_if.h"
#include <dev/usb/net/usb_ethernet.h>
#include <dev/usb/net/if_cdcereg.h>
static device_probe_t cdce_probe;
static device_attach_t cdce_attach;
static device_detach_t cdce_detach;
static device_suspend_t cdce_suspend;
static device_resume_t cdce_resume;
static usb_handle_request_t cdce_handle_request;
static usb_callback_t cdce_bulk_write_callback;
static usb_callback_t cdce_bulk_read_callback;
static usb_callback_t cdce_intr_read_callback;
static usb_callback_t cdce_intr_write_callback;
#if CDCE_HAVE_NCM
static usb_callback_t cdce_ncm_bulk_write_callback;
static usb_callback_t cdce_ncm_bulk_read_callback;
#endif
static uether_fn_t cdce_attach_post;
static uether_fn_t cdce_init;
static uether_fn_t cdce_stop;
static uether_fn_t cdce_start;
static uether_fn_t cdce_setmulti;
static uether_fn_t cdce_setpromisc;
static uint32_t cdce_m_crc32(struct mbuf *, uint32_t, uint32_t);
#ifdef USB_DEBUG
static int cdce_debug = 0;
static int cdce_tx_interval = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, cdce, CTLFLAG_RW, 0, "USB CDC-Ethernet");
SYSCTL_INT(_hw_usb_cdce, OID_AUTO, debug, CTLFLAG_RW, &cdce_debug, 0,
"Debug level");
SYSCTL_INT(_hw_usb_cdce, OID_AUTO, interval, CTLFLAG_RW, &cdce_tx_interval, 0,
"NCM transmit interval in ms");
#endif
static const struct usb_config cdce_config[CDCE_N_TRANSFER] = {
[CDCE_BULK_RX] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_RX,
.if_index = 0,
.frames = CDCE_FRAMES_MAX,
.bufsize = (CDCE_FRAMES_MAX * MCLBYTES),
.flags = {.pipe_bof = 1,.short_frames_ok = 1,.short_xfer_ok = 1,.ext_buffer = 1,},
.callback = cdce_bulk_read_callback,
.timeout = 0, /* no timeout */
.usb_mode = USB_MODE_DUAL, /* both modes */
},
[CDCE_BULK_TX] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_TX,
.if_index = 0,
.frames = CDCE_FRAMES_MAX,
.bufsize = (CDCE_FRAMES_MAX * MCLBYTES),
.flags = {.pipe_bof = 1,.force_short_xfer = 1,.ext_buffer = 1,},
.callback = cdce_bulk_write_callback,
.timeout = 10000, /* 10 seconds */
.usb_mode = USB_MODE_DUAL, /* both modes */
},
[CDCE_INTR_RX] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_RX,
.if_index = 1,
.bufsize = CDCE_IND_SIZE_MAX,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,.no_pipe_ok = 1,},
.callback = cdce_intr_read_callback,
.timeout = 0,
.usb_mode = USB_MODE_HOST,
},
[CDCE_INTR_TX] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_TX,
.if_index = 1,
.bufsize = CDCE_IND_SIZE_MAX,
.flags = {.pipe_bof = 1,.force_short_xfer = 1,.no_pipe_ok = 1,},
.callback = cdce_intr_write_callback,
.timeout = 10000, /* 10 seconds */
.usb_mode = USB_MODE_DEVICE,
},
};
#if CDCE_HAVE_NCM
static const struct usb_config cdce_ncm_config[CDCE_N_TRANSFER] = {
[CDCE_BULK_RX] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_RX,
.if_index = 0,
.frames = CDCE_NCM_RX_FRAMES_MAX,
.bufsize = (CDCE_NCM_RX_FRAMES_MAX * CDCE_NCM_RX_MAXLEN),
.flags = {.pipe_bof = 1,.short_frames_ok = 1,.short_xfer_ok = 1,},
.callback = cdce_ncm_bulk_read_callback,
.timeout = 0, /* no timeout */
.usb_mode = USB_MODE_DUAL, /* both modes */
},
[CDCE_BULK_TX] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_TX,
.if_index = 0,
.frames = CDCE_NCM_TX_FRAMES_MAX,
.bufsize = (CDCE_NCM_TX_FRAMES_MAX * CDCE_NCM_TX_MAXLEN),
.flags = {.pipe_bof = 1,},
.callback = cdce_ncm_bulk_write_callback,
.timeout = 10000, /* 10 seconds */
.usb_mode = USB_MODE_DUAL, /* both modes */
},
[CDCE_INTR_RX] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_RX,
.if_index = 1,
.bufsize = CDCE_IND_SIZE_MAX,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,.no_pipe_ok = 1,},
.callback = cdce_intr_read_callback,
.timeout = 0,
.usb_mode = USB_MODE_HOST,
},
[CDCE_INTR_TX] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_TX,
.if_index = 1,
.bufsize = CDCE_IND_SIZE_MAX,
.flags = {.pipe_bof = 1,.force_short_xfer = 1,.no_pipe_ok = 1,},
.callback = cdce_intr_write_callback,
.timeout = 10000, /* 10 seconds */
.usb_mode = USB_MODE_DEVICE,
},
};
#endif
static device_method_t cdce_methods[] = {
/* USB interface */
DEVMETHOD(usb_handle_request, cdce_handle_request),
/* Device interface */
DEVMETHOD(device_probe, cdce_probe),
DEVMETHOD(device_attach, cdce_attach),
DEVMETHOD(device_detach, cdce_detach),
DEVMETHOD(device_suspend, cdce_suspend),
DEVMETHOD(device_resume, cdce_resume),
{0, 0}
};
static driver_t cdce_driver = {
.name = "cdce",
.methods = cdce_methods,
.size = sizeof(struct cdce_softc),
};
static devclass_t cdce_devclass;
DRIVER_MODULE(cdce, uhub, cdce_driver, cdce_devclass, NULL, 0);
MODULE_VERSION(cdce, 1);
MODULE_DEPEND(cdce, uether, 1, 1, 1);
MODULE_DEPEND(cdce, usb, 1, 1, 1);
MODULE_DEPEND(cdce, ether, 1, 1, 1);
static const struct usb_ether_methods cdce_ue_methods = {
.ue_attach_post = cdce_attach_post,
.ue_start = cdce_start,
.ue_init = cdce_init,
.ue_stop = cdce_stop,
.ue_setmulti = cdce_setmulti,
.ue_setpromisc = cdce_setpromisc,
};
static const struct usb_device_id cdce_devs[] = {
{USB_VPI(USB_VENDOR_ACERLABS, USB_PRODUCT_ACERLABS_M5632, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_AMBIT, USB_PRODUCT_AMBIT_NTL_250, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_COMPAQ, USB_PRODUCT_COMPAQ_IPAQLINUX, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_GMATE, USB_PRODUCT_GMATE_YP3X00, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN2, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_ETHERNETGADGET, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2501, CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5500, CDCE_FLAG_ZAURUS)},
{USB_VPI(USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5600, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLA300, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLC700, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_VPI(USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SLC750, CDCE_FLAG_ZAURUS | CDCE_FLAG_NO_UNION)},
{USB_IF_CSI(UICLASS_CDC, UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL, 0)},
{USB_IF_CSI(UICLASS_CDC, UISUBCLASS_MOBILE_DIRECT_LINE_MODEL, 0)},
{USB_IF_CSI(UICLASS_CDC, UISUBCLASS_NETWORK_CONTROL_MODEL, 0)},
};
#if CDCE_HAVE_NCM
/*------------------------------------------------------------------------*
* cdce_ncm_init
*
* Return values:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
static uint8_t
cdce_ncm_init(struct cdce_softc *sc)
{
struct usb_ncm_parameters temp;
struct usb_device_request req;
struct usb_ncm_func_descriptor *ufd;
uint8_t value[8];
int err;
ufd = usbd_find_descriptor(sc->sc_ue.ue_udev, NULL,
sc->sc_ifaces_index[1], UDESC_CS_INTERFACE, 0 - 1,
UCDC_NCM_FUNC_DESC_SUBTYPE, 0 - 1);
/* verify length of NCM functional descriptor */
if (ufd != NULL) {
if (ufd->bLength < sizeof(*ufd))
ufd = NULL;
else
DPRINTFN(1, "Found NCM functional descriptor.\n");
}
req.bmRequestType = UT_READ_CLASS_INTERFACE;
req.bRequest = UCDC_NCM_GET_NTB_PARAMETERS;
USETW(req.wValue, 0);
req.wIndex[0] = sc->sc_ifaces_index[1];
req.wIndex[1] = 0;
USETW(req.wLength, sizeof(temp));
err = usbd_do_request_flags(sc->sc_ue.ue_udev, NULL, &req,
&temp, 0, NULL, 1000 /* ms */);
if (err)
return (1);
/* Read correct set of parameters according to device mode */
if (usbd_get_mode(sc->sc_ue.ue_udev) == USB_MODE_HOST) {
sc->sc_ncm.rx_max = UGETDW(temp.dwNtbInMaxSize);
sc->sc_ncm.tx_max = UGETDW(temp.dwNtbOutMaxSize);
sc->sc_ncm.tx_remainder = UGETW(temp.wNdpOutPayloadRemainder);
sc->sc_ncm.tx_modulus = UGETW(temp.wNdpOutDivisor);
sc->sc_ncm.tx_struct_align = UGETW(temp.wNdpOutAlignment);
sc->sc_ncm.tx_nframe = UGETW(temp.wNtbOutMaxDatagrams);
} else {
sc->sc_ncm.rx_max = UGETDW(temp.dwNtbOutMaxSize);
sc->sc_ncm.tx_max = UGETDW(temp.dwNtbInMaxSize);
sc->sc_ncm.tx_remainder = UGETW(temp.wNdpInPayloadRemainder);
sc->sc_ncm.tx_modulus = UGETW(temp.wNdpInDivisor);
sc->sc_ncm.tx_struct_align = UGETW(temp.wNdpInAlignment);
sc->sc_ncm.tx_nframe = UGETW(temp.wNtbOutMaxDatagrams);
}
/* Verify maximum receive length */
if ((sc->sc_ncm.rx_max < 32) ||
(sc->sc_ncm.rx_max > CDCE_NCM_RX_MAXLEN)) {
DPRINTFN(1, "Using default maximum receive length\n");
sc->sc_ncm.rx_max = CDCE_NCM_RX_MAXLEN;
}
/* Verify maximum transmit length */
if ((sc->sc_ncm.tx_max < 32) ||
(sc->sc_ncm.tx_max > CDCE_NCM_TX_MAXLEN)) {
DPRINTFN(1, "Using default maximum transmit length\n");
sc->sc_ncm.tx_max = CDCE_NCM_TX_MAXLEN;
}
/*
* Verify that the structure alignment is:
* - power of two
* - not greater than the maximum transmit length
* - not less than four bytes
*/
if ((sc->sc_ncm.tx_struct_align < 4) ||
(sc->sc_ncm.tx_struct_align !=
((-sc->sc_ncm.tx_struct_align) & sc->sc_ncm.tx_struct_align)) ||
(sc->sc_ncm.tx_struct_align >= sc->sc_ncm.tx_max)) {
DPRINTFN(1, "Using default other alignment: 4 bytes\n");
sc->sc_ncm.tx_struct_align = 4;
}
/*
* Verify that the payload alignment is:
* - power of two
* - not greater than the maximum transmit length
* - not less than four bytes
*/
if ((sc->sc_ncm.tx_modulus < 4) ||
(sc->sc_ncm.tx_modulus !=
((-sc->sc_ncm.tx_modulus) & sc->sc_ncm.tx_modulus)) ||
(sc->sc_ncm.tx_modulus >= sc->sc_ncm.tx_max)) {
DPRINTFN(1, "Using default transmit modulus: 4 bytes\n");
sc->sc_ncm.tx_modulus = 4;
}
/* Verify that the payload remainder */
if ((sc->sc_ncm.tx_remainder >= sc->sc_ncm.tx_modulus)) {
DPRINTFN(1, "Using default transmit remainder: 0 bytes\n");
sc->sc_ncm.tx_remainder = 0;
}
/*
* Offset the TX remainder so that IP packet payload starts at
* the tx_modulus. This is not too clear in the specification.
*/
sc->sc_ncm.tx_remainder =
(sc->sc_ncm.tx_remainder - ETHER_HDR_LEN) &
(sc->sc_ncm.tx_modulus - 1);
/* Verify max datagrams */
if (sc->sc_ncm.tx_nframe == 0 ||
sc->sc_ncm.tx_nframe > (CDCE_NCM_SUBFRAMES_MAX - 1)) {
DPRINTFN(1, "Using default max "
"subframes: %u units\n", CDCE_NCM_SUBFRAMES_MAX - 1);
/* need to reserve one entry for zero padding */
sc->sc_ncm.tx_nframe = (CDCE_NCM_SUBFRAMES_MAX - 1);
}
/* Additional configuration, will fail in device side mode, which is OK. */
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_NCM_SET_NTB_INPUT_SIZE;
USETW(req.wValue, 0);
req.wIndex[0] = sc->sc_ifaces_index[1];
req.wIndex[1] = 0;
if (ufd != NULL &&
(ufd->bmNetworkCapabilities & UCDC_NCM_CAP_MAX_DGRAM)) {
USETW(req.wLength, 8);
USETDW(value, sc->sc_ncm.rx_max);
USETW(value + 4, (CDCE_NCM_SUBFRAMES_MAX - 1));
USETW(value + 6, 0);
} else {
USETW(req.wLength, 4);
USETDW(value, sc->sc_ncm.rx_max);
}
err = usbd_do_request_flags(sc->sc_ue.ue_udev, NULL, &req,
&value, 0, NULL, 1000 /* ms */);
if (err) {
DPRINTFN(1, "Setting input size "
"to %u failed.\n", sc->sc_ncm.rx_max);
}
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_NCM_SET_CRC_MODE;
USETW(req.wValue, 0); /* no CRC */
req.wIndex[0] = sc->sc_ifaces_index[1];
req.wIndex[1] = 0;
USETW(req.wLength, 0);
err = usbd_do_request_flags(sc->sc_ue.ue_udev, NULL, &req,
NULL, 0, NULL, 1000 /* ms */);
if (err) {
DPRINTFN(1, "Setting CRC mode to off failed.\n");
}
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_NCM_SET_NTB_FORMAT;
USETW(req.wValue, 0); /* NTB-16 */
req.wIndex[0] = sc->sc_ifaces_index[1];
req.wIndex[1] = 0;
USETW(req.wLength, 0);
err = usbd_do_request_flags(sc->sc_ue.ue_udev, NULL, &req,
NULL, 0, NULL, 1000 /* ms */);
if (err) {
DPRINTFN(1, "Setting NTB format to 16-bit failed.\n");
}
return (0); /* success */
}
#endif
static int
cdce_probe(device_t dev)
{
struct usb_attach_arg *uaa = device_get_ivars(dev);
return (usbd_lookup_id_by_uaa(cdce_devs, sizeof(cdce_devs), uaa));
}
static void
cdce_attach_post(struct usb_ether *ue)
{
/* no-op */
return;
}
static int
cdce_attach(device_t dev)
{
struct cdce_softc *sc = device_get_softc(dev);
struct usb_ether *ue = &sc->sc_ue;
struct usb_attach_arg *uaa = device_get_ivars(dev);
struct usb_interface *iface;
const struct usb_cdc_union_descriptor *ud;
const struct usb_interface_descriptor *id;
const struct usb_cdc_ethernet_descriptor *ued;
const struct usb_config *pcfg;
int error;
uint8_t i;
uint8_t data_iface_no;
char eaddr_str[5 * ETHER_ADDR_LEN]; /* approx */
sc->sc_flags = USB_GET_DRIVER_INFO(uaa);
sc->sc_ue.ue_udev = uaa->device;
device_set_usb_desc(dev);
mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
ud = usbd_find_descriptor
(uaa->device, NULL, uaa->info.bIfaceIndex,
UDESC_CS_INTERFACE, 0 - 1, UDESCSUB_CDC_UNION, 0 - 1);
if ((ud == NULL) || (ud->bLength < sizeof(*ud)) ||
(sc->sc_flags & CDCE_FLAG_NO_UNION)) {
DPRINTFN(1, "No union descriptor!\n");
sc->sc_ifaces_index[0] = uaa->info.bIfaceIndex;
sc->sc_ifaces_index[1] = uaa->info.bIfaceIndex;
goto alloc_transfers;
}
data_iface_no = ud->bSlaveInterface[0];
for (i = 0;; i++) {
iface = usbd_get_iface(uaa->device, i);
if (iface) {
id = usbd_get_interface_descriptor(iface);
if (id && (id->bInterfaceNumber == data_iface_no)) {
sc->sc_ifaces_index[0] = i;
sc->sc_ifaces_index[1] = uaa->info.bIfaceIndex;
usbd_set_parent_iface(uaa->device, i, uaa->info.bIfaceIndex);
break;
}
} else {
device_printf(dev, "no data interface found\n");
goto detach;
}
}
/*
* <quote>
*
* The Data Class interface of a networking device shall have
* a minimum of two interface settings. The first setting
* (the default interface setting) includes no endpoints and
* therefore no networking traffic is exchanged whenever the
* default interface setting is selected. One or more
* additional interface settings are used for normal
* operation, and therefore each includes a pair of endpoints
* (one IN, and one OUT) to exchange network traffic. Select
* an alternate interface setting to initialize the network
* aspects of the device and to enable the exchange of
* network traffic.
*
* </quote>
*
* Some devices, most notably cable modems, include interface
* settings that have no IN or OUT endpoint, therefore loop
* through the list of all available interface settings
* looking for one with both IN and OUT endpoints.
*/
alloc_transfers:
pcfg = cdce_config; /* Default Configuration */
for (i = 0; i != 32; i++) {
error = usbd_set_alt_interface_index(uaa->device,
sc->sc_ifaces_index[0], i);
if (error)
break;
#if CDCE_HAVE_NCM
if ((i == 0) && (cdce_ncm_init(sc) == 0))
pcfg = cdce_ncm_config;
#endif
error = usbd_transfer_setup(uaa->device,
sc->sc_ifaces_index, sc->sc_xfer,
pcfg, CDCE_N_TRANSFER, sc, &sc->sc_mtx);
if (error == 0)
break;
}
if (error || (i == 32)) {
device_printf(dev, "No valid alternate "
"setting found\n");
goto detach;
}
ued = usbd_find_descriptor
(uaa->device, NULL, uaa->info.bIfaceIndex,
UDESC_CS_INTERFACE, 0 - 1, UDESCSUB_CDC_ENF, 0 - 1);
if ((ued == NULL) || (ued->bLength < sizeof(*ued))) {
error = USB_ERR_INVAL;
} else {
error = usbd_req_get_string_any(uaa->device, NULL,
eaddr_str, sizeof(eaddr_str), ued->iMacAddress);
}
if (error) {
/* fake MAC address */
device_printf(dev, "faking MAC address\n");
sc->sc_ue.ue_eaddr[0] = 0x2a;
memcpy(&sc->sc_ue.ue_eaddr[1], &ticks, sizeof(uint32_t));
sc->sc_ue.ue_eaddr[5] = device_get_unit(dev);
} else {
memset(sc->sc_ue.ue_eaddr, 0, sizeof(sc->sc_ue.ue_eaddr));
for (i = 0; i != (ETHER_ADDR_LEN * 2); i++) {
char c = eaddr_str[i];
if ('0' <= c && c <= '9')
c -= '0';
else if (c != 0)
c -= 'A' - 10;
else
break;
c &= 0xf;
if ((i & 1) == 0)
c <<= 4;
sc->sc_ue.ue_eaddr[i / 2] |= c;
}
if (uaa->usb_mode == USB_MODE_DEVICE) {
/*
* Do not use the same MAC address like the peer !
*/
sc->sc_ue.ue_eaddr[5] ^= 0xFF;
}
}
ue->ue_sc = sc;
ue->ue_dev = dev;
ue->ue_udev = uaa->device;
ue->ue_mtx = &sc->sc_mtx;
ue->ue_methods = &cdce_ue_methods;
error = uether_ifattach(ue);
if (error) {
device_printf(dev, "could not attach interface\n");
goto detach;
}
return (0); /* success */
detach:
cdce_detach(dev);
return (ENXIO); /* failure */
}
static int
cdce_detach(device_t dev)
{
struct cdce_softc *sc = device_get_softc(dev);
struct usb_ether *ue = &sc->sc_ue;
/* stop all USB transfers first */
usbd_transfer_unsetup(sc->sc_xfer, CDCE_N_TRANSFER);
uether_ifdetach(ue);
mtx_destroy(&sc->sc_mtx);
return (0);
}
static void
cdce_start(struct usb_ether *ue)
{
struct cdce_softc *sc = uether_getsc(ue);
/*
* Start the USB transfers, if not already started:
*/
usbd_transfer_start(sc->sc_xfer[CDCE_BULK_TX]);
usbd_transfer_start(sc->sc_xfer[CDCE_BULK_RX]);
}
static void
cdce_free_queue(struct mbuf **ppm, uint8_t n)
{
uint8_t x;
for (x = 0; x != n; x++) {
if (ppm[x] != NULL) {
m_freem(ppm[x]);
ppm[x] = NULL;
}
}
}
static void
cdce_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct cdce_softc *sc = usbd_xfer_softc(xfer);
struct ifnet *ifp = uether_getifp(&sc->sc_ue);
struct mbuf *m;
struct mbuf *mt;
uint32_t crc;
uint8_t x;
int actlen, aframes;
usbd_xfer_status(xfer, &actlen, NULL, &aframes, NULL);
DPRINTFN(1, "\n");
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTFN(11, "transfer complete: %u bytes in %u frames\n",
actlen, aframes);
ifp->if_opackets++;
/* free all previous TX buffers */
cdce_free_queue(sc->sc_tx_buf, CDCE_FRAMES_MAX);
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
for (x = 0; x != CDCE_FRAMES_MAX; x++) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
break;
if (sc->sc_flags & CDCE_FLAG_ZAURUS) {
/*
* Zaurus wants a 32-bit CRC appended
* to every frame
*/
crc = cdce_m_crc32(m, 0, m->m_pkthdr.len);
crc = htole32(crc);
if (!m_append(m, 4, (void *)&crc)) {
m_freem(m);
ifp->if_oerrors++;
continue;
}
}
if (m->m_len != m->m_pkthdr.len) {
mt = m_defrag(m, M_DONTWAIT);
if (mt == NULL) {
m_freem(m);
ifp->if_oerrors++;
continue;
}
m = mt;
}
if (m->m_pkthdr.len > MCLBYTES) {
m->m_pkthdr.len = MCLBYTES;
}
sc->sc_tx_buf[x] = m;
usbd_xfer_set_frame_data(xfer, x, m->m_data, m->m_len);
/*
* If there's a BPF listener, bounce a copy of
* this frame to him:
*/
BPF_MTAP(ifp, m);
}
if (x != 0) {
usbd_xfer_set_frames(xfer, x);
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
DPRINTFN(11, "transfer error, %s\n",
usbd_errstr(error));
/* free all previous TX buffers */
cdce_free_queue(sc->sc_tx_buf, CDCE_FRAMES_MAX);
/* count output errors */
ifp->if_oerrors++;
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static int32_t
cdce_m_crc32_cb(void *arg, void *src, uint32_t count)
{
uint32_t *p_crc = arg;
*p_crc = crc32_raw(src, count, *p_crc);
return (0);
}
static uint32_t
cdce_m_crc32(struct mbuf *m, uint32_t src_offset, uint32_t src_len)
{
uint32_t crc = 0xFFFFFFFF;
int error;
error = m_apply(m, src_offset, src_len, cdce_m_crc32_cb, &crc);
return (crc ^ 0xFFFFFFFF);
}
static void
cdce_init(struct usb_ether *ue)
{
struct cdce_softc *sc = uether_getsc(ue);
struct ifnet *ifp = uether_getifp(ue);
CDCE_LOCK_ASSERT(sc, MA_OWNED);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
/* start interrupt transfer */
usbd_transfer_start(sc->sc_xfer[CDCE_INTR_RX]);
usbd_transfer_start(sc->sc_xfer[CDCE_INTR_TX]);
/* stall data write direction, which depends on USB mode */
usbd_xfer_set_stall(sc->sc_xfer[CDCE_BULK_TX]);
/* start data transfers */
cdce_start(ue);
}
static void
cdce_stop(struct usb_ether *ue)
{
struct cdce_softc *sc = uether_getsc(ue);
struct ifnet *ifp = uether_getifp(ue);
CDCE_LOCK_ASSERT(sc, MA_OWNED);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
/*
* stop all the transfers, if not already stopped:
*/
usbd_transfer_stop(sc->sc_xfer[CDCE_BULK_RX]);
usbd_transfer_stop(sc->sc_xfer[CDCE_BULK_TX]);
usbd_transfer_stop(sc->sc_xfer[CDCE_INTR_RX]);
usbd_transfer_stop(sc->sc_xfer[CDCE_INTR_TX]);
}
static void
cdce_setmulti(struct usb_ether *ue)
{
/* no-op */
return;
}
static void
cdce_setpromisc(struct usb_ether *ue)
{
/* no-op */
return;
}
static int
cdce_suspend(device_t dev)
{
device_printf(dev, "Suspending\n");
return (0);
}
static int
cdce_resume(device_t dev)
{
device_printf(dev, "Resuming\n");
return (0);
}
static void
cdce_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct cdce_softc *sc = usbd_xfer_softc(xfer);
struct mbuf *m;
uint8_t x;
int actlen, aframes, len;
usbd_xfer_status(xfer, &actlen, NULL, &aframes, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTF("received %u bytes in %u frames\n", actlen, aframes);
for (x = 0; x != aframes; x++) {
m = sc->sc_rx_buf[x];
sc->sc_rx_buf[x] = NULL;
len = usbd_xfer_frame_len(xfer, x);
/* Strip off CRC added by Zaurus, if any */
if ((sc->sc_flags & CDCE_FLAG_ZAURUS) && len >= 14)
len -= 4;
if (len < sizeof(struct ether_header)) {
m_freem(m);
continue;
}
/* queue up mbuf */
uether_rxmbuf(&sc->sc_ue, m, len);
}
/* FALLTHROUGH */
case USB_ST_SETUP:
/*
* TODO: Implement support for multi frame transfers,
* when the USB hardware supports it.
*/
for (x = 0; x != 1; x++) {
if (sc->sc_rx_buf[x] == NULL) {
m = uether_newbuf();
if (m == NULL)
goto tr_stall;
sc->sc_rx_buf[x] = m;
} else {
m = sc->sc_rx_buf[x];
}
usbd_xfer_set_frame_data(xfer, x, m->m_data, m->m_len);
}
/* set number of frames and start hardware */
usbd_xfer_set_frames(xfer, x);
usbd_transfer_submit(xfer);
/* flush any received frames */
uether_rxflush(&sc->sc_ue);
break;
default: /* Error */
DPRINTF("error = %s\n",
usbd_errstr(error));
if (error != USB_ERR_CANCELLED) {
tr_stall:
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
usbd_xfer_set_frames(xfer, 0);
usbd_transfer_submit(xfer);
break;
}
/* need to free the RX-mbufs when we are cancelled */
cdce_free_queue(sc->sc_rx_buf, CDCE_FRAMES_MAX);
break;
}
}
static void
cdce_intr_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTF("Received %d bytes\n", actlen);
/* TODO: decode some indications */
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* start clear stall */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static void
cdce_intr_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTF("Transferred %d bytes\n", actlen);
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
#if 0
usbd_xfer_set_frame_len(xfer, 0, XXX);
usbd_transfer_submit(xfer);
#endif
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* start clear stall */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static int
cdce_handle_request(device_t dev,
const void *req, void **pptr, uint16_t *plen,
uint16_t offset, uint8_t *pstate)
{
return (ENXIO); /* use builtin handler */
}
#if CDCE_HAVE_NCM
static void
cdce_ncm_tx_zero(struct usb_page_cache *pc,
uint32_t start, uint32_t end)
{
if (start >= CDCE_NCM_TX_MAXLEN)
return;
if (end > CDCE_NCM_TX_MAXLEN)
end = CDCE_NCM_TX_MAXLEN;
usbd_frame_zero(pc, start, end - start);
}
static uint8_t
cdce_ncm_fill_tx_frames(struct usb_xfer *xfer, uint8_t index)
{
struct cdce_softc *sc = usbd_xfer_softc(xfer);
struct ifnet *ifp = uether_getifp(&sc->sc_ue);
struct usb_page_cache *pc = usbd_xfer_get_frame(xfer, index);
struct mbuf *m;
uint32_t rem;
uint32_t offset;
uint32_t last_offset;
uint16_t n;
uint8_t retval;
usbd_xfer_set_frame_offset(xfer, index * CDCE_NCM_TX_MAXLEN, index);
offset = sizeof(sc->sc_ncm.hdr) +
sizeof(sc->sc_ncm.dpt) + sizeof(sc->sc_ncm.dp);
/* Store last valid offset before alignment */
last_offset = offset;
/* Align offset */
offset = CDCE_NCM_ALIGN(sc->sc_ncm.tx_remainder,
offset, sc->sc_ncm.tx_modulus);
/* Zero pad */
cdce_ncm_tx_zero(pc, last_offset, offset);
/* buffer full */
retval = 2;
for (n = 0; n != sc->sc_ncm.tx_nframe; n++) {
/* check if end of transmit buffer is reached */
if (offset >= sc->sc_ncm.tx_max)
break;
/* compute maximum buffer size */
rem = sc->sc_ncm.tx_max - offset;
IFQ_DRV_DEQUEUE(&(ifp->if_snd), m);
if (m == NULL) {
/* buffer not full */
retval = 1;
break;
}
if (m->m_pkthdr.len > rem) {
if (n == 0) {
/* The frame won't fit in our buffer */
DPRINTFN(1, "Frame too big to be transmitted!\n");
m_freem(m);
ifp->if_oerrors++;
n--;
continue;
}
/* Wait till next buffer becomes ready */
IFQ_DRV_PREPEND(&(ifp->if_snd), m);
break;
}
usbd_m_copy_in(pc, offset, m, 0, m->m_pkthdr.len);
USETW(sc->sc_ncm.dp[n].wFrameLength, m->m_pkthdr.len);
USETW(sc->sc_ncm.dp[n].wFrameIndex, offset);
/* Update offset */
offset += m->m_pkthdr.len;
/* Store last valid offset before alignment */
last_offset = offset;
/* Align offset */
offset = CDCE_NCM_ALIGN(sc->sc_ncm.tx_remainder,
offset, sc->sc_ncm.tx_modulus);
/* Zero pad */
cdce_ncm_tx_zero(pc, last_offset, offset);
/*
* If there's a BPF listener, bounce a copy
* of this frame to him:
*/
BPF_MTAP(ifp, m);
/* Free mbuf */
m_freem(m);
/* Pre-increment interface counter */
ifp->if_opackets++;
}
if (n == 0)
return (0);
rem = (sizeof(sc->sc_ncm.dpt) + (4 * n) + 4);
USETW(sc->sc_ncm.dpt.wLength, rem);
/* zero the rest of the data pointer entries */
for (; n != CDCE_NCM_SUBFRAMES_MAX; n++) {
USETW(sc->sc_ncm.dp[n].wFrameLength, 0);
USETW(sc->sc_ncm.dp[n].wFrameIndex, 0);
}
offset = last_offset;
/* Align offset */
offset = CDCE_NCM_ALIGN(0, offset, CDCE_NCM_TX_MINLEN);
/* Optimise, save bandwidth and force short termination */
if (offset >= sc->sc_ncm.tx_max)
offset = sc->sc_ncm.tx_max;
else
offset ++;
/* Zero pad */
cdce_ncm_tx_zero(pc, last_offset, offset);
/* set frame length */
usbd_xfer_set_frame_len(xfer, index, offset);
/* Fill out 16-bit header */
sc->sc_ncm.hdr.dwSignature[0] = 'N';
sc->sc_ncm.hdr.dwSignature[1] = 'C';
sc->sc_ncm.hdr.dwSignature[2] = 'M';
sc->sc_ncm.hdr.dwSignature[3] = 'H';
USETW(sc->sc_ncm.hdr.wHeaderLength, sizeof(sc->sc_ncm.hdr));
USETW(sc->sc_ncm.hdr.wBlockLength, offset);
USETW(sc->sc_ncm.hdr.wSequence, sc->sc_ncm.tx_seq);
USETW(sc->sc_ncm.hdr.wDptIndex, sizeof(sc->sc_ncm.hdr));
sc->sc_ncm.tx_seq++;
/* Fill out 16-bit frame table header */
sc->sc_ncm.dpt.dwSignature[0] = 'N';
sc->sc_ncm.dpt.dwSignature[1] = 'C';
sc->sc_ncm.dpt.dwSignature[2] = 'M';
sc->sc_ncm.dpt.dwSignature[3] = '0';
USETW(sc->sc_ncm.dpt.wNextNdpIndex, 0); /* reserved */
usbd_copy_in(pc, 0, &(sc->sc_ncm.hdr), sizeof(sc->sc_ncm.hdr));
usbd_copy_in(pc, sizeof(sc->sc_ncm.hdr), &(sc->sc_ncm.dpt),
sizeof(sc->sc_ncm.dpt));
usbd_copy_in(pc, sizeof(sc->sc_ncm.hdr) + sizeof(sc->sc_ncm.dpt),
&(sc->sc_ncm.dp), sizeof(sc->sc_ncm.dp));
return (retval);
}
static void
cdce_ncm_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct cdce_softc *sc = usbd_xfer_softc(xfer);
struct ifnet *ifp = uether_getifp(&sc->sc_ue);
uint16_t x;
uint8_t temp;
int actlen;
int aframes;
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
usbd_xfer_status(xfer, &actlen, NULL, &aframes, NULL);
DPRINTFN(10, "transfer complete: "
"%u bytes in %u frames\n", actlen, aframes);
case USB_ST_SETUP:
for (x = 0; x != CDCE_NCM_TX_FRAMES_MAX; x++) {
temp = cdce_ncm_fill_tx_frames(xfer, x);
if (temp == 0)
break;
if (temp == 1) {
x++;
break;
}
}
if (x != 0) {
#ifdef USB_DEBUG
usbd_xfer_set_interval(xfer, cdce_tx_interval);
#endif
usbd_xfer_set_frames(xfer, x);
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
DPRINTFN(10, "Transfer error: %s\n",
usbd_errstr(error));
/* update error counter */
ifp->if_oerrors += 1;
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
usbd_xfer_set_frames(xfer, 0);
usbd_transfer_submit(xfer);
}
break;
}
}
static void
cdce_ncm_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct cdce_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc = usbd_xfer_get_frame(xfer, 0);
struct ifnet *ifp = uether_getifp(&sc->sc_ue);
struct mbuf *m;
int sumdata;
int sumlen;
int actlen;
int aframes;
int temp;
int nframes;
int x;
int offset;
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
usbd_xfer_status(xfer, &actlen, &sumlen, &aframes, NULL);
DPRINTFN(1, "received %u bytes in %u frames\n",
actlen, aframes);
if (actlen < (sizeof(sc->sc_ncm.hdr) +
sizeof(sc->sc_ncm.dpt))) {
DPRINTFN(1, "frame too short\n");
goto tr_setup;
}
usbd_copy_out(pc, 0, &(sc->sc_ncm.hdr),
sizeof(sc->sc_ncm.hdr));
if ((sc->sc_ncm.hdr.dwSignature[0] != 'N') ||
(sc->sc_ncm.hdr.dwSignature[1] != 'C') ||
(sc->sc_ncm.hdr.dwSignature[2] != 'M') ||
(sc->sc_ncm.hdr.dwSignature[3] != 'H')) {
DPRINTFN(1, "invalid HDR signature: "
"0x%02x:0x%02x:0x%02x:0x%02x\n",
sc->sc_ncm.hdr.dwSignature[0],
sc->sc_ncm.hdr.dwSignature[1],
sc->sc_ncm.hdr.dwSignature[2],
sc->sc_ncm.hdr.dwSignature[3]);
goto tr_stall;
}
temp = UGETW(sc->sc_ncm.hdr.wBlockLength);
if (temp > sumlen) {
DPRINTFN(1, "unsupported block length %u/%u\n",
temp, sumlen);
goto tr_stall;
}
temp = UGETW(sc->sc_ncm.hdr.wDptIndex);
if ((temp + sizeof(sc->sc_ncm.dpt)) > actlen) {
DPRINTFN(1, "invalid DPT index: 0x%04x\n", temp);
goto tr_stall;
}
usbd_copy_out(pc, temp, &(sc->sc_ncm.dpt),
sizeof(sc->sc_ncm.dpt));
if ((sc->sc_ncm.dpt.dwSignature[0] != 'N') ||
(sc->sc_ncm.dpt.dwSignature[1] != 'C') ||
(sc->sc_ncm.dpt.dwSignature[2] != 'M') ||
(sc->sc_ncm.dpt.dwSignature[3] != '0')) {
DPRINTFN(1, "invalid DPT signature"
"0x%02x:0x%02x:0x%02x:0x%02x\n",
sc->sc_ncm.dpt.dwSignature[0],
sc->sc_ncm.dpt.dwSignature[1],
sc->sc_ncm.dpt.dwSignature[2],
sc->sc_ncm.dpt.dwSignature[3]);
goto tr_stall;
}
nframes = UGETW(sc->sc_ncm.dpt.wLength) / 4;
/* Subtract size of header and last zero padded entry */
if (nframes >= (2 + 1))
nframes -= (2 + 1);
else
nframes = 0;
DPRINTFN(1, "nframes = %u\n", nframes);
temp += sizeof(sc->sc_ncm.dpt);
if ((temp + (4 * nframes)) > actlen)
goto tr_stall;
if (nframes > CDCE_NCM_SUBFRAMES_MAX) {
DPRINTFN(1, "Truncating number of frames from %u to %u\n",
nframes, CDCE_NCM_SUBFRAMES_MAX);
nframes = CDCE_NCM_SUBFRAMES_MAX;
}
usbd_copy_out(pc, temp, &(sc->sc_ncm.dp), (4 * nframes));
sumdata = 0;
for (x = 0; x != nframes; x++) {
offset = UGETW(sc->sc_ncm.dp[x].wFrameIndex);
temp = UGETW(sc->sc_ncm.dp[x].wFrameLength);
if ((offset == 0) ||
(temp < sizeof(struct ether_header)) ||
(temp > (MCLBYTES - ETHER_ALIGN))) {
DPRINTFN(1, "NULL frame detected at %d\n", x);
m = NULL;
/* silently ignore this frame */
continue;
} else if ((offset + temp) > actlen) {
DPRINTFN(1, "invalid frame "
"detected at %d\n", x);
m = NULL;
/* silently ignore this frame */
continue;
} else if (temp > (MHLEN - ETHER_ALIGN)) {
m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
} else {
m = m_gethdr(M_DONTWAIT, MT_DATA);
}
DPRINTFN(16, "frame %u, offset = %u, length = %u \n",
x, offset, temp);
/* check if we have a buffer */
if (m) {
m_adj(m, ETHER_ALIGN);
usbd_copy_out(pc, offset, m->m_data, temp);
/* enqueue */
uether_rxmbuf(&sc->sc_ue, m, temp);
sumdata += temp;
} else {
ifp->if_ierrors++;
}
}
DPRINTFN(1, "Efficiency: %u/%u bytes\n", sumdata, actlen);
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, sc->sc_ncm.rx_max);
usbd_xfer_set_frames(xfer, 1);
usbd_transfer_submit(xfer);
uether_rxflush(&sc->sc_ue); /* must be last */
break;
default: /* Error */
DPRINTFN(1, "error = %s\n",
usbd_errstr(error));
if (error != USB_ERR_CANCELLED) {
tr_stall:
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
usbd_xfer_set_frames(xfer, 0);
usbd_transfer_submit(xfer);
}
break;
}
}
#endif
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