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freebsd-dev/sys/dev/usb/if_aue.c
Alfred Perlstein cc8317f2b0 Fix a deadlock in detach/shutdown. 
The problem was that I was acquiring the driver sx lock and then waiting
for a taskqueue to drain, however the taskqueue itself would try to
acquire the lock as well leading to a deadlock.

To fix the problem roll my own exclusive lock that allows for lock
cancellation.  This is a normal exclusive lock, however if someone
marks it as "dead" then all waiters who request an error return will
get back an error instead of continuing to wait for the lock.

In this particular case, the shutdown and detach functions kill the
lock while the async task thread tries to acquire the lock but will
abort if the lock returns an error.

The other option was to drop the driver lock mid-detach and mid-shutdown,
mid-detach was a ok, however mid-shutdown was not.

While I'm here, fix a bug in what appears to be the mii link status
word in the softc going out to lunch.  Explicitly set the status
word to 1 after initializing the mii.  This would result in an interface
that would never respond to "if_start" requests as the mii interface
would always look down.
2006-12-23 17:18:18 +00:00

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/*-
* Copyright (c) 1997, 1998, 1999, 2000
* Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
*
* Copyright (c) 2006
* Alfred Perlstein <alfred@freebsd.org>. 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 OR THE VOICES IN HIS HEAD
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* ADMtek AN986 Pegasus and AN8511 Pegasus II USB to ethernet driver.
* Datasheet is available from http://www.admtek.com.tw.
*
* Written by Bill Paul <wpaul@ee.columbia.edu>
* Electrical Engineering Department
* Columbia University, New York City
*
* SMP locking by Alfred Perlstein <alfred@freebsd.org>.
* RED Inc.
*/
/*
* The Pegasus chip uses four USB "endpoints" to provide 10/100 ethernet
* support: the control endpoint for reading/writing registers, burst
* read endpoint for packet reception, burst write for packet transmission
* and one for "interrupts." The chip uses the same RX filter scheme
* as the other ADMtek ethernet parts: one perfect filter entry for the
* the station address and a 64-bit multicast hash table. The chip supports
* both MII and HomePNA attachments.
*
* Since the maximum data transfer speed of USB is supposed to be 12Mbps,
* you're never really going to get 100Mbps speeds from this device. I
* think the idea is to allow the device to connect to 10 or 100Mbps
* networks, not necessarily to provide 100Mbps performance. Also, since
* the controller uses an external PHY chip, it's possible that board
* designers might simply choose a 10Mbps PHY.
*
* Registers are accessed using usbd_do_request(). Packet transfers are
* done using usbd_transfer() and friends.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/kdb.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/condvar.h>
#include <sys/taskqueue.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/bpf.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdivar.h>
#include "usbdevs.h"
#include <dev/usb/usb_ethersubr.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/usb/if_auereg.h>
MODULE_DEPEND(aue, usb, 1, 1, 1);
MODULE_DEPEND(aue, ether, 1, 1, 1);
MODULE_DEPEND(aue, miibus, 1, 1, 1);
/* "device miibus" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
/*
* Various supported device vendors/products.
*/
struct aue_type {
struct usb_devno aue_dev;
u_int16_t aue_flags;
#define LSYS 0x0001 /* use Linksys reset */
#define PNA 0x0002 /* has Home PNA */
#define PII 0x0004 /* Pegasus II chip */
};
static const struct aue_type aue_devs[] = {
{{ USB_VENDOR_3COM, USB_PRODUCT_3COM_3C460B}, PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX1}, PNA|PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX2}, PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_UFE1000}, LSYS },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX4}, PNA },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX5}, PNA },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX6}, PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX7}, PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX8}, PII },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX9}, PNA },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_XX10}, 0 },
{{ USB_VENDOR_ABOCOM, USB_PRODUCT_ABOCOM_DSB650TX_PNA}, 0 },
{{ USB_VENDOR_ACCTON, USB_PRODUCT_ACCTON_USB320_EC}, 0 },
{{ USB_VENDOR_ACCTON, USB_PRODUCT_ACCTON_SS1001}, PII },
{{ USB_VENDOR_ADMTEK, USB_PRODUCT_ADMTEK_PEGASUS}, PNA },
{{ USB_VENDOR_ADMTEK, USB_PRODUCT_ADMTEK_PEGASUSII}, PII },
{{ USB_VENDOR_ADMTEK, USB_PRODUCT_ADMTEK_PEGASUSII_2}, PII },
{{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_USB2LAN}, PII },
{{ USB_VENDOR_BILLIONTON, USB_PRODUCT_BILLIONTON_USB100}, 0 },
{{ USB_VENDOR_BILLIONTON, USB_PRODUCT_BILLIONTON_USBLP100}, PNA },
{{ USB_VENDOR_BILLIONTON, USB_PRODUCT_BILLIONTON_USBEL100}, 0 },
{{ USB_VENDOR_BILLIONTON, USB_PRODUCT_BILLIONTON_USBE100}, PII },
{{ USB_VENDOR_COREGA, USB_PRODUCT_COREGA_FETHER_USB_TX}, 0 },
{{ USB_VENDOR_COREGA, USB_PRODUCT_COREGA_FETHER_USB_TXS},PII },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX4}, LSYS|PII },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX1}, LSYS },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX}, LSYS },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX_PNA}, PNA },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX3}, LSYS|PII },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650TX2}, LSYS|PII },
{{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DSB650}, LSYS },
{{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_LDUSBTX0}, 0 },
{{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_LDUSBTX1}, LSYS },
{{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_LDUSBTX2}, 0 },
{{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_LDUSBTX3}, LSYS },
{{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_LDUSBLTX}, PII },
{{ USB_VENDOR_ELSA, USB_PRODUCT_ELSA_USB2ETHERNET}, 0 },
{{ USB_VENDOR_HAWKING, USB_PRODUCT_HAWKING_UF100}, PII },
{{ USB_VENDOR_HP, USB_PRODUCT_HP_HN210E}, PII },
{{ USB_VENDOR_IODATA, USB_PRODUCT_IODATA_USBETTX}, 0 },
{{ USB_VENDOR_IODATA, USB_PRODUCT_IODATA_USBETTXS}, PII },
{{ USB_VENDOR_KINGSTON, USB_PRODUCT_KINGSTON_KNU101TX}, 0 },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB10TX1}, LSYS|PII },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB10T}, LSYS },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB100TX}, LSYS },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB100H1}, LSYS|PNA },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB10TA}, LSYS },
{{ USB_VENDOR_LINKSYS, USB_PRODUCT_LINKSYS_USB10TX2}, LSYS|PII },
{{ USB_VENDOR_MICROSOFT, USB_PRODUCT_MICROSOFT_MN110}, PII },
{{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUATX1}, 0 },
{{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUATX5}, 0 },
{{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_LUA2TX5}, PII },
{{ USB_VENDOR_NETGEAR, USB_PRODUCT_NETGEAR_FA101}, PII },
{{ USB_VENDOR_SIEMENS, USB_PRODUCT_SIEMENS_SPEEDSTREAM}, PII },
{{ USB_VENDOR_SMARTBRIDGES, USB_PRODUCT_SMARTBRIDGES_SMARTNIC},PII },
{{ USB_VENDOR_SMC, USB_PRODUCT_SMC_2202USB}, 0 },
{{ USB_VENDOR_SMC, USB_PRODUCT_SMC_2206USB}, PII },
{{ USB_VENDOR_SOHOWARE, USB_PRODUCT_SOHOWARE_NUB100}, 0 },
};
#define aue_lookup(v, p) ((const struct aue_type *)usb_lookup(aue_devs, v, p))
static int aue_match(device_t);
static int aue_attach(device_t);
static int aue_detach(device_t);
static void aue_reset_pegasus_II(struct aue_softc *sc);
static int aue_encap(struct aue_softc *, struct mbuf *, int);
#ifdef AUE_INTR_PIPE
static void aue_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
#endif
static void aue_rxeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
static void aue_rxeof_thread(struct aue_softc *sc);
static void aue_txeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
static void aue_txeof_thread(struct aue_softc *);
static void aue_task_sched(struct aue_softc *, int);
static void aue_task(void *xsc, int pending);
static void aue_tick(void *);
static void aue_rxstart(struct ifnet *);
static void aue_rxstart_thread(struct aue_softc *);
static void aue_start(struct ifnet *);
static void aue_start_thread(struct aue_softc *);
static int aue_ioctl(struct ifnet *, u_long, caddr_t);
static void aue_init(void *);
static void aue_init_body(struct aue_softc *);
static void aue_stop(struct aue_softc *);
static void aue_watchdog(struct ifnet *);
static void aue_shutdown(device_t);
static int aue_ifmedia_upd(struct ifnet *);
static void aue_ifmedia_sts(struct ifnet *, struct ifmediareq *);
static void aue_eeprom_getword(struct aue_softc *, int, u_int16_t *);
static void aue_read_eeprom(struct aue_softc *, caddr_t, int, int, int);
static int aue_miibus_readreg(device_t, int, int);
static int aue_miibus_writereg(device_t, int, int, int);
static void aue_miibus_statchg(device_t);
static void aue_setmulti(struct aue_softc *);
static void aue_reset(struct aue_softc *);
static int aue_csr_read_1(struct aue_softc *, int);
static int aue_csr_write_1(struct aue_softc *, int, int);
static int aue_csr_read_2(struct aue_softc *, int);
static int aue_csr_write_2(struct aue_softc *, int, int);
static int aue_xlock(struct aue_softc *, int);
static void aue_xunlock(struct aue_softc *);
static void aue_xlockkill(struct aue_softc *);
static void aue_xlockrevive(struct aue_softc *);
static void aue_xlockassert(struct aue_softc *, int,
const char *, const char *, int);
static void aue_stopasynctasks(struct aue_softc *);
static device_method_t aue_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, aue_match),
DEVMETHOD(device_attach, aue_attach),
DEVMETHOD(device_detach, aue_detach),
DEVMETHOD(device_shutdown, aue_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, aue_miibus_readreg),
DEVMETHOD(miibus_writereg, aue_miibus_writereg),
DEVMETHOD(miibus_statchg, aue_miibus_statchg),
{ 0, 0 }
};
static driver_t aue_driver = {
"aue",
aue_methods,
sizeof(struct aue_softc)
};
static devclass_t aue_devclass;
DRIVER_MODULE(aue, uhub, aue_driver, aue_devclass, usbd_driver_load, 0);
DRIVER_MODULE(miibus, aue, miibus_driver, miibus_devclass, 0, 0);
#define AUE_SETBIT(sc, reg, x) \
aue_csr_write_1(sc, reg, aue_csr_read_1(sc, reg) | (x))
#define AUE_CLRBIT(sc, reg, x) \
aue_csr_write_1(sc, reg, aue_csr_read_1(sc, reg) & ~(x))
static int
aue_csr_read_1(struct aue_softc *sc, int reg)
{
usb_device_request_t req;
usbd_status err;
u_int8_t val = 0;
if (sc->aue_dying)
return (0);
AUE_SXASSERTLOCKED(sc);
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = AUE_UR_READREG;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, 1);
err = usbd_do_request(sc->aue_udev, &req, &val);
if (err) {
return (0);
}
return (val);
}
static int
aue_csr_read_2(struct aue_softc *sc, int reg)
{
usb_device_request_t req;
usbd_status err;
u_int16_t val = 0;
if (sc->aue_dying)
return (0);
AUE_SXASSERTLOCKED(sc);
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = AUE_UR_READREG;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, 2);
err = usbd_do_request(sc->aue_udev, &req, &val);
if (err) {
return (0);
}
return (val);
}
static int
aue_csr_write_1(struct aue_softc *sc, int reg, int val)
{
usb_device_request_t req;
usbd_status err;
if (sc->aue_dying)
return (0);
AUE_SXASSERTLOCKED(sc);
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = AUE_UR_WRITEREG;
USETW(req.wValue, val);
USETW(req.wIndex, reg);
USETW(req.wLength, 1);
err = usbd_do_request(sc->aue_udev, &req, &val);
if (err) {
return (-1);
}
return (0);
}
static int
aue_csr_write_2(struct aue_softc *sc, int reg, int val)
{
usb_device_request_t req;
usbd_status err;
if (sc->aue_dying)
return (0);
AUE_SXASSERTLOCKED(sc);
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = AUE_UR_WRITEREG;
USETW(req.wValue, val);
USETW(req.wIndex, reg);
USETW(req.wLength, 2);
err = usbd_do_request(sc->aue_udev, &req, &val);
if (err) {
return (-1);
}
return (0);
}
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void
aue_eeprom_getword(struct aue_softc *sc, int addr, u_int16_t *dest)
{
int i;
u_int16_t word = 0;
aue_csr_write_1(sc, AUE_EE_REG, addr);
aue_csr_write_1(sc, AUE_EE_CTL, AUE_EECTL_READ);
for (i = 0; i < AUE_TIMEOUT; i++) {
if (aue_csr_read_1(sc, AUE_EE_CTL) & AUE_EECTL_DONE)
break;
}
if (i == AUE_TIMEOUT) {
printf("aue%d: EEPROM read timed out\n",
sc->aue_unit);
}
word = aue_csr_read_2(sc, AUE_EE_DATA);
*dest = word;
return;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void
aue_read_eeprom(struct aue_softc *sc, caddr_t dest, int off, int cnt, int swap)
{
int i;
u_int16_t word = 0, *ptr;
for (i = 0; i < cnt; i++) {
aue_eeprom_getword(sc, off + i, &word);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
return;
}
static int
aue_miibus_readreg(device_t dev, int phy, int reg)
{
struct aue_softc *sc = USBGETSOFTC(dev);
int i;
u_int16_t val = 0;
/*
* The Am79C901 HomePNA PHY actually contains
* two transceivers: a 1Mbps HomePNA PHY and a
* 10Mbps full/half duplex ethernet PHY with
* NWAY autoneg. However in the ADMtek adapter,
* only the 1Mbps PHY is actually connected to
* anything, so we ignore the 10Mbps one. It
* happens to be configured for MII address 3,
* so we filter that out.
*/
if (sc->aue_vendor == USB_VENDOR_ADMTEK &&
sc->aue_product == USB_PRODUCT_ADMTEK_PEGASUS) {
if (phy == 3)
return (0);
#ifdef notdef
if (phy != 1)
return (0);
#endif
}
aue_csr_write_1(sc, AUE_PHY_ADDR, phy);
aue_csr_write_1(sc, AUE_PHY_CTL, reg | AUE_PHYCTL_READ);
for (i = 0; i < AUE_TIMEOUT; i++) {
if (aue_csr_read_1(sc, AUE_PHY_CTL) & AUE_PHYCTL_DONE)
break;
}
if (i == AUE_TIMEOUT) {
printf("aue%d: MII read timed out\n", sc->aue_unit);
}
val = aue_csr_read_2(sc, AUE_PHY_DATA);
return (val);
}
static int
aue_miibus_writereg(device_t dev, int phy, int reg, int data)
{
struct aue_softc *sc = USBGETSOFTC(dev);
int i;
if (phy == 3)
return (0);
aue_csr_write_2(sc, AUE_PHY_DATA, data);
aue_csr_write_1(sc, AUE_PHY_ADDR, phy);
aue_csr_write_1(sc, AUE_PHY_CTL, reg | AUE_PHYCTL_WRITE);
for (i = 0; i < AUE_TIMEOUT; i++) {
if (aue_csr_read_1(sc, AUE_PHY_CTL) & AUE_PHYCTL_DONE)
break;
}
if (i == AUE_TIMEOUT) {
printf("aue%d: MII read timed out\n",
sc->aue_unit);
}
return(0);
}
static void
aue_miibus_statchg(device_t dev)
{
struct aue_softc *sc = USBGETSOFTC(dev);
struct mii_data *mii = GET_MII(sc);
AUE_CLRBIT(sc, AUE_CTL0, AUE_CTL0_RX_ENB | AUE_CTL0_TX_ENB);
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) {
AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_SPEEDSEL);
} else {
AUE_CLRBIT(sc, AUE_CTL1, AUE_CTL1_SPEEDSEL);
}
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_DUPLEX);
else
AUE_CLRBIT(sc, AUE_CTL1, AUE_CTL1_DUPLEX);
AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_RX_ENB | AUE_CTL0_TX_ENB);
/*
* Set the LED modes on the LinkSys adapter.
* This turns on the 'dual link LED' bin in the auxmode
* register of the Broadcom PHY.
*/
if (sc->aue_flags & LSYS) {
u_int16_t auxmode;
auxmode = aue_miibus_readreg(dev, 0, 0x1b);
aue_miibus_writereg(dev, 0, 0x1b, auxmode | 0x04);
}
return;
}
#define AUE_BITS 6
static void
aue_setmulti(struct aue_softc *sc)
{
struct ifnet *ifp;
struct ifmultiaddr *ifma;
u_int32_t h = 0, i;
u_int8_t hashtbl[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
AUE_SXASSERTLOCKED(sc);
ifp = sc->aue_ifp;
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_ALLMULTI);
return;
}
AUE_CLRBIT(sc, AUE_CTL0, AUE_CTL0_ALLMULTI);
/* now program new ones */
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
{
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = ether_crc32_le(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN) & ((1 << AUE_BITS) - 1);
hashtbl[(h >> 3)] |= 1 << (h & 0x7);
}
IF_ADDR_UNLOCK(ifp);
/* write the hashtable */
for (i = 0; i < 8; i++)
aue_csr_write_1(sc, AUE_MAR0 + i, hashtbl[i]);
return;
}
static void
aue_reset_pegasus_II(struct aue_softc *sc)
{
/* Magic constants taken from Linux driver. */
aue_csr_write_1(sc, AUE_REG_1D, 0);
aue_csr_write_1(sc, AUE_REG_7B, 2);
#if 0
if ((sc->aue_flags & HAS_HOME_PNA) && mii_mode)
aue_csr_write_1(sc, AUE_REG_81, 6);
else
#endif
aue_csr_write_1(sc, AUE_REG_81, 2);
}
static void
aue_reset(struct aue_softc *sc)
{
int i;
AUE_SXASSERTLOCKED(sc);
AUE_SETBIT(sc, AUE_CTL1, AUE_CTL1_RESETMAC);
for (i = 0; i < AUE_TIMEOUT; i++) {
if (!(aue_csr_read_1(sc, AUE_CTL1) & AUE_CTL1_RESETMAC))
break;
}
if (i == AUE_TIMEOUT)
printf("aue%d: reset failed\n", sc->aue_unit);
/*
* The PHY(s) attached to the Pegasus chip may be held
* in reset until we flip on the GPIO outputs. Make sure
* to set the GPIO pins high so that the PHY(s) will
* be enabled.
*
* Note: We force all of the GPIO pins low first, *then*
* enable the ones we want.
*/
aue_csr_write_1(sc, AUE_GPIO0, AUE_GPIO_OUT0|AUE_GPIO_SEL0);
aue_csr_write_1(sc, AUE_GPIO0, AUE_GPIO_OUT0|AUE_GPIO_SEL0|AUE_GPIO_SEL1);
if (sc->aue_flags & LSYS) {
/* Grrr. LinkSys has to be different from everyone else. */
aue_csr_write_1(sc, AUE_GPIO0,
AUE_GPIO_SEL0 | AUE_GPIO_SEL1);
aue_csr_write_1(sc, AUE_GPIO0,
AUE_GPIO_SEL0 | AUE_GPIO_SEL1 | AUE_GPIO_OUT0);
}
if (sc->aue_flags & PII)
aue_reset_pegasus_II(sc);
/* Wait a little while for the chip to get its brains in order. */
DELAY(10000);
return;
}
/*
* Probe for a Pegasus chip.
*/
USB_MATCH(aue)
{
USB_MATCH_START(aue, uaa);
if (uaa->iface != NULL)
return (UMATCH_NONE);
return (aue_lookup(uaa->vendor, uaa->product) != NULL ?
UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
USB_ATTACH(aue)
{
USB_ATTACH_START(aue, sc, uaa);
char devinfo[1024];
u_char eaddr[ETHER_ADDR_LEN];
struct ifnet *ifp;
usbd_interface_handle iface;
usbd_status err;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
int i;
bzero(sc, sizeof(struct aue_softc));
usbd_devinfo(uaa->device, 0, devinfo);
sc->aue_dev = self;
sc->aue_udev = uaa->device;
sc->aue_unit = device_get_unit(self);
if (usbd_set_config_no(sc->aue_udev, AUE_CONFIG_NO, 0)) {
printf("aue%d: getting interface handle failed\n",
sc->aue_unit);
USB_ATTACH_ERROR_RETURN;
}
err = usbd_device2interface_handle(uaa->device, AUE_IFACE_IDX, &iface);
if (err) {
printf("aue%d: getting interface handle failed\n",
sc->aue_unit);
USB_ATTACH_ERROR_RETURN;
}
sc->aue_iface = iface;
sc->aue_flags = aue_lookup(uaa->vendor, uaa->product)->aue_flags;
sc->aue_product = uaa->product;
sc->aue_vendor = uaa->vendor;
id = usbd_get_interface_descriptor(sc->aue_iface);
usbd_devinfo(uaa->device, 0, devinfo);
device_set_desc_copy(self, devinfo);
printf("%s: %s\n", device_get_nameunit(self), devinfo);
/* Find endpoints. */
for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(iface, i);
if (ed == NULL) {
printf("aue%d: couldn't get ep %d\n",
sc->aue_unit, i);
USB_ATTACH_ERROR_RETURN;
}
if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
sc->aue_ed[AUE_ENDPT_RX] = ed->bEndpointAddress;
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
sc->aue_ed[AUE_ENDPT_TX] = ed->bEndpointAddress;
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
sc->aue_ed[AUE_ENDPT_INTR] = ed->bEndpointAddress;
}
}
mtx_init(&sc->aue_mtx, device_get_nameunit(self), MTX_NETWORK_LOCK,
MTX_DEF | MTX_RECURSE);
cv_init(&sc->aue_cv, device_get_nameunit(self));
AUE_SXLOCK(sc);
/* Reset the adapter. */
aue_reset(sc);
/*
* Get station address from the EEPROM.
*/
aue_read_eeprom(sc, (caddr_t)&eaddr, 0, 3, 0);
ifp = sc->aue_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
printf("aue%d: can not if_alloc()\n", sc->aue_unit);
AUE_SXUNLOCK(sc);
mtx_destroy(&sc->aue_mtx);
cv_destroy(&sc->aue_cv);
USB_ATTACH_ERROR_RETURN;
}
ifp->if_softc = sc;
if_initname(ifp, "aue", sc->aue_unit);
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = aue_ioctl;
ifp->if_start = aue_start;
ifp->if_watchdog = aue_watchdog;
ifp->if_init = aue_init;
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
/*
* Do MII setup.
* NOTE: Doing this causes child devices to be attached to us,
* which we would normally disconnect at in the detach routine
* using device_delete_child(). However the USB code is set up
* such that when this driver is removed, all children devices
* are removed as well. In effect, the USB code ends up detaching
* all of our children for us, so we don't have to do is ourselves
* in aue_detach(). It's important to point this out since if
* we *do* try to detach the child devices ourselves, we will
* end up getting the children deleted twice, which will crash
* the system.
*/
if (mii_phy_probe(self, &sc->aue_miibus,
aue_ifmedia_upd, aue_ifmedia_sts)) {
printf("aue%d: MII without any PHY!\n", sc->aue_unit);
if_free(ifp);
AUE_SXUNLOCK(sc);
mtx_destroy(&sc->aue_mtx);
cv_destroy(&sc->aue_cv);
USB_ATTACH_ERROR_RETURN;
}
sc->aue_qdat.ifp = ifp;
sc->aue_qdat.if_rxstart = aue_rxstart;
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, eaddr);
usb_register_netisr();
sc->aue_dying = 0;
sc->aue_link = 1;
AUE_SXUNLOCK(sc);
USB_ATTACH_SUCCESS_RETURN;
}
static int
aue_detach(device_t dev)
{
struct aue_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
AUE_SXLOCK(sc);
ifp = sc->aue_ifp;
sc->aue_dying = 1;
aue_stopasynctasks(sc);
ether_ifdetach(ifp);
if_free(ifp);
if (sc->aue_ep[AUE_ENDPT_TX] != NULL)
usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_TX]);
if (sc->aue_ep[AUE_ENDPT_RX] != NULL)
usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_RX]);
#ifdef AUE_INTR_PIPE
if (sc->aue_ep[AUE_ENDPT_INTR] != NULL)
usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_INTR]);
#endif
AUE_SXUNLOCK(sc);
mtx_destroy(&sc->aue_mtx);
cv_destroy(&sc->aue_cv);
return (0);
}
static void
aue_rxstart(struct ifnet *ifp)
{
struct aue_softc *sc = ifp->if_softc;
aue_task_sched(sc, AUE_TASK_RXSTART);
}
static void
aue_rxstart_thread(struct aue_softc *sc)
{
struct ue_chain *c;
struct ifnet *ifp;
ifp = sc->aue_ifp;
sc = ifp->if_softc;
AUE_SXASSERTLOCKED(sc);
c = &sc->aue_cdata.ue_rx_chain[sc->aue_cdata.ue_rx_prod];
c->ue_mbuf = usb_ether_newbuf();
if (c->ue_mbuf == NULL) {
printf("%s: no memory for rx list "
"-- packet dropped!\n", device_get_nameunit(sc->aue_dev));
ifp->if_ierrors++;
AUE_UNLOCK(sc);
return;
}
/* Setup new transfer. */
usbd_setup_xfer(c->ue_xfer, sc->aue_ep[AUE_ENDPT_RX],
c, mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
USBD_NO_TIMEOUT, aue_rxeof);
usbd_transfer(c->ue_xfer);
return;
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void
aue_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
struct ue_chain *c = priv;
c->ue_status = status;
aue_task_sched(c->ue_sc, AUE_TASK_RXEOF);
}
static void
aue_rxeof_thread(struct aue_softc *sc)
{
struct ue_chain *c = &(sc->aue_cdata.ue_rx_chain[0]);
struct mbuf *m;
struct ifnet *ifp;
int total_len = 0;
struct aue_rxpkt r;
usbd_status status = c->ue_status;
AUE_SXASSERTLOCKED(sc);
if (sc->aue_dying)
return;
ifp = sc->aue_ifp;
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
return;
}
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
return;
}
if (usbd_ratecheck(&sc->aue_rx_notice))
printf("aue%d: usb error on rx: %s\n", sc->aue_unit,
usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall(sc->aue_ep[AUE_ENDPT_RX]);
goto done;
}
usbd_get_xfer_status(c->ue_xfer, NULL, NULL, &total_len, NULL);
if (total_len <= 4 + ETHER_CRC_LEN) {
ifp->if_ierrors++;
goto done;
}
m = c->ue_mbuf;
bcopy(mtod(m, char *) + total_len - 4, (char *)&r, sizeof(r));
/* Turn off all the non-error bits in the rx status word. */
r.aue_rxstat &= AUE_RXSTAT_MASK;
if (r.aue_rxstat) {
ifp->if_ierrors++;
goto done;
}
/* No errors; receive the packet. */
total_len -= (4 + ETHER_CRC_LEN);
ifp->if_ipackets++;
m->m_pkthdr.rcvif = (void *)&sc->aue_qdat;
m->m_pkthdr.len = m->m_len = total_len;
/* Put the packet on the special USB input queue. */
usb_ether_input(m);
return;
done:
/* Setup new transfer. */
usbd_setup_xfer(c->ue_xfer, sc->aue_ep[AUE_ENDPT_RX],
c, mtod(c->ue_mbuf, char *), UE_BUFSZ, USBD_SHORT_XFER_OK,
USBD_NO_TIMEOUT, aue_rxeof);
usbd_transfer(c->ue_xfer);
return;
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void
aue_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
struct ue_chain *c = priv;
c->ue_status = status;
aue_task_sched(c->ue_sc, AUE_TASK_TXEOF);
}
static void
aue_txeof_thread(struct aue_softc *sc)
{
struct ue_chain *c = &(sc->aue_cdata.ue_tx_chain[0]);
struct ifnet *ifp;
usbd_status err, status;
AUE_SXASSERTLOCKED(sc);
status = c->ue_status;
ifp = sc->aue_ifp;
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
return;
}
printf("aue%d: usb error on tx: %s\n", sc->aue_unit,
usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall(sc->aue_ep[AUE_ENDPT_TX]);
return;
}
ifp->if_timer = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
usbd_get_xfer_status(c->ue_xfer, NULL, NULL, NULL, &err);
if (c->ue_mbuf != NULL) {
c->ue_mbuf->m_pkthdr.rcvif = ifp;
usb_tx_done(c->ue_mbuf);
c->ue_mbuf = NULL;
}
if (err)
ifp->if_oerrors++;
else
ifp->if_opackets++;
return;
}
static void
aue_tick(void *xsc)
{
struct aue_softc *sc = xsc;
aue_task_sched(sc, AUE_TASK_TICK);
}
static void
aue_tick_thread(struct aue_softc *sc)
{
struct ifnet *ifp;
struct mii_data *mii;
AUE_SXASSERTLOCKED(sc);
ifp = sc->aue_ifp;
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
return;
}
mii = GET_MII(sc);
if (mii == NULL) {
goto resched;
}
mii_tick(mii);
if (!sc->aue_link && mii->mii_media_status & IFM_ACTIVE &&
IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
sc->aue_link++;
if (ifp->if_snd.ifq_head != NULL)
aue_start_thread(sc);
}
resched:
(void) callout_reset(&sc->aue_tick_callout, hz, aue_tick, sc);
return;
}
static int
aue_encap(struct aue_softc *sc, struct mbuf *m, int idx)
{
int total_len;
struct ue_chain *c;
usbd_status err;
AUE_SXASSERTLOCKED(sc);
c = &sc->aue_cdata.ue_tx_chain[idx];
/*
* Copy the mbuf data into a contiguous buffer, leaving two
* bytes at the beginning to hold the frame length.
*/
m_copydata(m, 0, m->m_pkthdr.len, c->ue_buf + 2);
c->ue_mbuf = m;
total_len = m->m_pkthdr.len + 2;
/*
* The ADMtek documentation says that the packet length is
* supposed to be specified in the first two bytes of the
* transfer, however it actually seems to ignore this info
* and base the frame size on the bulk transfer length.
*/
c->ue_buf[0] = (u_int8_t)m->m_pkthdr.len;
c->ue_buf[1] = (u_int8_t)(m->m_pkthdr.len >> 8);
usbd_setup_xfer(c->ue_xfer, sc->aue_ep[AUE_ENDPT_TX],
c, c->ue_buf, total_len, USBD_FORCE_SHORT_XFER,
10000, aue_txeof);
/* Transmit */
err = usbd_transfer(c->ue_xfer);
if (err != USBD_IN_PROGRESS) {
aue_stop(sc);
return (EIO);
}
sc->aue_cdata.ue_tx_cnt++;
return (0);
}
static void
aue_start(struct ifnet *ifp)
{
struct aue_softc *sc = ifp->if_softc;
aue_task_sched(sc, AUE_TASK_START);
}
static void
aue_start_thread(struct aue_softc *sc)
{
struct ifnet *ifp = sc->aue_ifp;
struct mbuf *m_head = NULL;
AUE_SXASSERTLOCKED(sc);
if (!sc->aue_link) {
return;
}
if (ifp->if_drv_flags & IFF_DRV_OACTIVE) {
return;
}
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL) {
return;
}
if (aue_encap(sc, m_head, 0)) {
IF_PREPEND(&ifp->if_snd, m_head);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
BPF_MTAP(ifp, m_head);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
return;
}
static void
aue_init(void *xsc)
{
struct aue_softc *sc = xsc;
AUE_SXLOCK(sc);
aue_init_body(sc);
AUE_SXUNLOCK(sc);
}
static void
aue_init_body(struct aue_softc *sc)
{
struct ifnet *ifp = sc->aue_ifp;
struct mii_data *mii = GET_MII(sc);
struct ue_chain *c;
usbd_status err;
int i;
AUE_SXASSERTLOCKED(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
return;
}
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
aue_reset(sc);
/* Set MAC address */
for (i = 0; i < ETHER_ADDR_LEN; i++)
aue_csr_write_1(sc, AUE_PAR0 + i, IF_LLADDR(sc->aue_ifp)[i]);
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC)
AUE_SETBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
else
AUE_CLRBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
/* Init TX ring. */
if (usb_ether_tx_list_init(sc, &sc->aue_cdata,
sc->aue_udev) == ENOBUFS) {
printf("aue%d: tx list init failed\n", sc->aue_unit);
return;
}
/* Init RX ring. */
if (usb_ether_rx_list_init(sc, &sc->aue_cdata,
sc->aue_udev) == ENOBUFS) {
printf("aue%d: rx list init failed\n", sc->aue_unit);
return;
}
/* Load the multicast filter. */
aue_setmulti(sc);
/* Enable RX and TX */
aue_csr_write_1(sc, AUE_CTL0, AUE_CTL0_RXSTAT_APPEND | AUE_CTL0_RX_ENB);
AUE_SETBIT(sc, AUE_CTL0, AUE_CTL0_TX_ENB);
AUE_SETBIT(sc, AUE_CTL2, AUE_CTL2_EP3_CLR);
mii_mediachg(mii);
/* Open RX and TX pipes. */
err = usbd_open_pipe(sc->aue_iface, sc->aue_ed[AUE_ENDPT_RX],
USBD_EXCLUSIVE_USE, &sc->aue_ep[AUE_ENDPT_RX]);
if (err) {
printf("aue%d: open rx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
return;
}
err = usbd_open_pipe(sc->aue_iface, sc->aue_ed[AUE_ENDPT_TX],
USBD_EXCLUSIVE_USE, &sc->aue_ep[AUE_ENDPT_TX]);
if (err) {
printf("aue%d: open tx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
return;
}
/* Start up the receive pipe. */
for (i = 0; i < UE_RX_LIST_CNT; i++) {
c = &sc->aue_cdata.ue_rx_chain[i];
usbd_setup_xfer(c->ue_xfer, sc->aue_ep[AUE_ENDPT_RX],
c, mtod(c->ue_mbuf, char *), UE_BUFSZ,
USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, aue_rxeof);
usbd_transfer(c->ue_xfer);
}
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
TASK_INIT(&sc->aue_task, 0, aue_task, sc);
callout_init(&sc->aue_tick_callout, 1);
(void) callout_reset(&sc->aue_tick_callout, hz, aue_tick, sc);
return;
}
/*
* Set media options.
*/
static int
aue_ifmedia_upd(struct ifnet *ifp)
{
struct aue_softc *sc = ifp->if_softc;
struct mii_data *mii = GET_MII(sc);
sc->aue_link = 0;
if (mii->mii_instance) {
struct mii_softc *miisc;
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
mii_phy_reset(miisc);
}
mii_mediachg(mii);
sc->aue_link = 1;
return (0);
}
/*
* Report current media status.
*/
static void
aue_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct aue_softc *sc = ifp->if_softc;
struct mii_data *mii = GET_MII(sc);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
return;
}
static int
aue_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct aue_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
struct mii_data *mii;
int error = 0;
if (sc->aue_dying)
return(0);
AUE_GIANTLOCK();
switch(command) {
case SIOCSIFFLAGS:
AUE_SXLOCK(sc);
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
ifp->if_flags & IFF_PROMISC &&
!(sc->aue_if_flags & IFF_PROMISC)) {
AUE_SETBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
} else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
!(ifp->if_flags & IFF_PROMISC) &&
sc->aue_if_flags & IFF_PROMISC) {
AUE_CLRBIT(sc, AUE_CTL2, AUE_CTL2_RX_PROMISC);
} else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
aue_init_body(sc);
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
aue_stop(sc);
}
sc->aue_if_flags = ifp->if_flags;
AUE_SXUNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
AUE_SXLOCK(sc);
aue_setmulti(sc);
AUE_SXUNLOCK(sc);
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
AUE_SXLOCK(sc);
mii = GET_MII(sc);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
AUE_SXUNLOCK(sc);
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
AUE_GIANTUNLOCK();
return (error);
}
static void
aue_watchdog(struct ifnet *ifp)
{
struct aue_softc *sc = ifp->if_softc;
aue_task_sched(sc, AUE_TASK_WATCHDOG);
}
static void
aue_watchdog_thread(struct aue_softc *sc)
{
struct ifnet *ifp = sc->aue_ifp;
struct ue_chain *c;
usbd_status stat;
AUE_SXASSERTLOCKED(sc);
ifp->if_oerrors++;
printf("aue%d: watchdog timeout\n", sc->aue_unit);
c = &sc->aue_cdata.ue_tx_chain[0];
usbd_get_xfer_status(c->ue_xfer, NULL, NULL, NULL, &stat);
c->ue_status = stat;
aue_txeof_thread(sc);
if (ifp->if_snd.ifq_head != NULL)
aue_start_thread(sc);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
aue_stop(struct aue_softc *sc)
{
usbd_status err;
struct ifnet *ifp;
AUE_SXASSERTLOCKED(sc);
ifp = sc->aue_ifp;
ifp->if_timer = 0;
aue_csr_write_1(sc, AUE_CTL0, 0);
aue_csr_write_1(sc, AUE_CTL1, 0);
aue_reset(sc);
aue_stopasynctasks(sc);
/* Stop transfers. */
if (sc->aue_ep[AUE_ENDPT_RX] != NULL) {
err = usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_RX]);
if (err) {
printf("aue%d: abort rx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
err = usbd_close_pipe(sc->aue_ep[AUE_ENDPT_RX]);
if (err) {
printf("aue%d: close rx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
sc->aue_ep[AUE_ENDPT_RX] = NULL;
}
if (sc->aue_ep[AUE_ENDPT_TX] != NULL) {
err = usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_TX]);
if (err) {
printf("aue%d: abort tx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
err = usbd_close_pipe(sc->aue_ep[AUE_ENDPT_TX]);
if (err) {
printf("aue%d: close tx pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
sc->aue_ep[AUE_ENDPT_TX] = NULL;
}
#ifdef AUE_INTR_PIPE
if (sc->aue_ep[AUE_ENDPT_INTR] != NULL) {
err = usbd_abort_pipe(sc->aue_ep[AUE_ENDPT_INTR]);
if (err) {
printf("aue%d: abort intr pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
err = usbd_close_pipe(sc->aue_ep[AUE_ENDPT_INTR]);
if (err) {
printf("aue%d: close intr pipe failed: %s\n",
sc->aue_unit, usbd_errstr(err));
}
sc->aue_ep[AUE_ENDPT_INTR] = NULL;
}
#endif
/* Free RX resources. */
usb_ether_rx_list_free(&sc->aue_cdata);
/* Free TX resources. */
usb_ether_tx_list_free(&sc->aue_cdata);
#ifdef AUE_INTR_PIPE
free(sc->aue_cdata.ue_ibuf, M_USBDEV);
sc->aue_cdata.ue_ibuf = NULL;
#endif
sc->aue_link = 0;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
return;
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void
aue_shutdown(device_t dev)
{
struct aue_softc *sc;
sc = device_get_softc(dev);
AUE_SXLOCK(sc);
sc->aue_dying++;
aue_reset(sc);
aue_stop(sc);
AUE_SXUNLOCK(sc);
return;
}
static void
aue_task_sched(struct aue_softc *sc, int task)
{
AUE_LOCK(sc);
sc->aue_deferedtasks |= task;
taskqueue_enqueue(taskqueue_thread, &sc->aue_task);
AUE_UNLOCK(sc);
}
static int
aue_xlock(struct aue_softc *sc, int interruptable)
{
AUE_LOCK(sc);
while ((sc->aue_lockflags & AUE_LOCKED) != 0) {
if (sc->aue_locker == curthread) {
#if 1
panic("aue: locking against myself");
#else
kdb_backtrace();
printf("aue: locking against myself\n");
#endif
}
if (interruptable) {
if ((sc->aue_lockflags & AUE_LOCKDEAD) != 0) {
AUE_UNLOCK(sc);
return (ENOLCK);
}
}
cv_wait(&sc->aue_cv, &sc->aue_mtx);
}
sc->aue_lockflags |= AUE_LOCKED;
sc->aue_locker = curthread;
AUE_UNLOCK(sc);
return (0);
}
static void
aue_xunlock(struct aue_softc *sc)
{
AUE_LOCK(sc);
if (sc->aue_locker != curthread) {
#if 1
panic("unlocking lock not owned by me");
#else
kdb_backtrace();
printf("unlocking lock not owned by me\n");
#endif
}
sc->aue_lockflags &= ~AUE_LOCKED;
sc->aue_locker = NULL;
cv_signal(&sc->aue_cv);
AUE_UNLOCK(sc);
}
static void
aue_xlockkill(struct aue_softc *sc)
{
AUE_LOCK(sc);
sc->aue_lockflags |= AUE_LOCKDEAD;
cv_broadcast(&sc->aue_cv);
AUE_UNLOCK(sc);
}
static void
aue_xlockrevive(struct aue_softc *sc)
{
AUE_LOCK(sc);
sc->aue_lockflags &= ~AUE_LOCKDEAD;
cv_broadcast(&sc->aue_cv);
AUE_UNLOCK(sc);
}
static void
aue_xlockassert(
struct aue_softc *sc,
int locked,
const char *file,
const char *fun,
int line)
{
struct thread *td;
int flags;
AUE_LOCK(sc);
flags = sc->aue_lockflags;
td = sc->aue_locker;
AUE_UNLOCK(sc);
if (locked == 1) {
if ((flags & AUE_LOCKED) == 0 || td != curthread) {
panic("aue assert: lock not owned @%s:%s:%d",
file, fun, line);
}
} else {
if ((flags & AUE_LOCKED) != 0 && td == curthread) {
panic("aue assert: lock owned @%s:%s:%d",
file, fun, line);
}
}
}
static void
aue_stopasynctasks(struct aue_softc *sc)
{
AUE_SXASSERTLOCKED(sc);
callout_drain(&sc->aue_tick_callout);
aue_xlockkill(sc);
taskqueue_drain(taskqueue_thread, &sc->aue_task);
aue_xlockrevive(sc);
}
/*
* We defer all interrupt operations to this function.
*
* This allows us to do more complex operations, such as synchronous
* usb io that normally would not be allowed from interrupt context.
*/
static void
aue_task(void *arg, int pending)
{
struct aue_softc *sc = arg;
int tasks;
AUE_LOCK(sc);
while ((tasks = sc->aue_deferedtasks) != 0) {
sc->aue_deferedtasks = 0;
AUE_UNLOCK(sc);
AUE_GIANTLOCK(); // XXX: usb not giant safe
/*
* Try to lock the exclusive lock, if we fail
* then we are probably draining the taskqueue.
* If we did an unconditional lock here we would
* deadlock.
*/
if (aue_xlock(sc, 1)) {
AUE_GIANTUNLOCK(); // XXX: usb not giant safe
break;
}
if ((tasks & AUE_TASK_WATCHDOG) != 0) {
aue_watchdog_thread(sc);
}
if ((tasks & AUE_TASK_TICK) != 0) {
aue_tick_thread(sc);
}
if ((tasks & AUE_TASK_START) != 0) {
aue_start_thread(sc);
}
if ((tasks & AUE_TASK_RXSTART) != 0) {
aue_rxstart_thread(sc);
}
if ((tasks & AUE_TASK_RXEOF) != 0) {
aue_rxeof_thread(sc);
}
if ((tasks & AUE_TASK_TXEOF) != 0) {
aue_txeof_thread(sc);
}
AUE_SXUNLOCK(sc);
AUE_GIANTUNLOCK(); // XXX: usb not giant safe
AUE_LOCK(sc);
}
AUE_UNLOCK(sc);
}
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