f709eddf9f
usb_ethersubr.c. This module maintains two queues for packets which are each protected with one mutex. These are all the changes I can do for now. Removing the USBD_NO_TSLEEP flag doesn't work yet: when I tried it, the system would usually freeze up after a NIC had been operating for a while. The usb_ethersubr module itself ought to go away; this is the next thing I need to test.
162 lines
4.7 KiB
C
162 lines
4.7 KiB
C
/*
|
|
* Copyright (c) 1997, 1998, 1999, 2000
|
|
* Bill Paul <wpaul@ee.columbia.edu>. 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Callbacks in the USB code operate at splusb() (actually splbio()
|
|
* in FreeBSD). However adding packets to the input queues has to be
|
|
* done at splimp(). It is conceivable that this arrangement could
|
|
* trigger a condition where the splimp() is ignored and the input
|
|
* queues could get trampled in spite of our best effors to prevent
|
|
* it. To work around this, we implement a special input queue for
|
|
* USB ethernet adapter drivers. Rather than passing the frames directly
|
|
* to ether_input(), we pass them here, then schedule a soft interrupt
|
|
* to hand them to ether_input() later, outside of the USB interrupt
|
|
* context.
|
|
*
|
|
* It's questional as to whether this code should be expanded to
|
|
* handle other kinds of devices, or handle USB transfer callbacks
|
|
* in general. Right now, I need USB network interfaces to work
|
|
* properly.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/if_arp.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/netisr.h>
|
|
#include <net/bpf.h>
|
|
|
|
#include <dev/usb/usb.h>
|
|
#include <dev/usb/usb_ethersubr.h>
|
|
|
|
#ifndef lint
|
|
Static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif
|
|
|
|
Static struct ifqueue usbq_rx;
|
|
Static struct mtx usbq_rx_mtx;
|
|
Static struct ifqueue usbq_tx;
|
|
Static struct mtx usbq_tx_mtx;
|
|
Static int mtx_inited = 0;
|
|
|
|
Static void usbintr __P((void));
|
|
|
|
Static void usbintr()
|
|
{
|
|
struct ether_header *eh;
|
|
struct mbuf *m;
|
|
struct usb_qdat *q;
|
|
struct ifnet *ifp;
|
|
|
|
/* Check the RX queue */
|
|
while(1) {
|
|
mtx_enter(&usbq_rx_mtx, MTX_DEF);
|
|
IF_DEQUEUE(&usbq_rx, m);
|
|
mtx_exit(&usbq_rx_mtx, MTX_DEF);
|
|
if (m == NULL)
|
|
break;
|
|
eh = mtod(m, struct ether_header *);
|
|
q = (struct usb_qdat *)m->m_pkthdr.rcvif;
|
|
ifp = q->ifp;
|
|
m->m_pkthdr.rcvif = ifp;
|
|
m_adj(m, sizeof(struct ether_header));
|
|
ether_input(ifp, eh, m);
|
|
|
|
/* Re-arm the receiver */
|
|
(*q->if_rxstart)(ifp);
|
|
if (ifp->if_snd.ifq_head != NULL)
|
|
(*ifp->if_start)(ifp);
|
|
}
|
|
|
|
/* Check the TX queue */
|
|
while(1) {
|
|
mtx_enter(&usbq_tx_mtx, MTX_DEF);
|
|
IF_DEQUEUE(&usbq_tx, m);
|
|
mtx_exit(&usbq_tx_mtx, MTX_DEF);
|
|
if (m == NULL)
|
|
break;
|
|
ifp = m->m_pkthdr.rcvif;
|
|
m_freem(m);
|
|
if (ifp->if_snd.ifq_head != NULL)
|
|
(*ifp->if_start)(ifp);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void usb_register_netisr()
|
|
{
|
|
if (mtx_inited)
|
|
return;
|
|
register_netisr(NETISR_USB, usbintr);
|
|
mtx_init(&usbq_tx_mtx, "usbq_tx_mtx", MTX_DEF);
|
|
mtx_init(&usbq_rx_mtx, "usbq_rx_mtx", MTX_DEF);
|
|
mtx_inited++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Must be called at splusp() (actually splbio()). This should be
|
|
* the case when called from a transfer callback routine.
|
|
*/
|
|
void usb_ether_input(m)
|
|
struct mbuf *m;
|
|
{
|
|
mtx_enter(&usbq_rx_mtx, MTX_DEF);
|
|
IF_ENQUEUE(&usbq_rx, m);
|
|
mtx_exit(&usbq_rx_mtx, MTX_DEF);
|
|
schednetisr(NETISR_USB);
|
|
|
|
return;
|
|
}
|
|
|
|
void usb_tx_done(m)
|
|
struct mbuf *m;
|
|
{
|
|
mtx_enter(&usbq_tx_mtx, MTX_DEF);
|
|
IF_ENQUEUE(&usbq_tx, m);
|
|
mtx_exit(&usbq_tx_mtx, MTX_DEF);
|
|
schednetisr(NETISR_USB);
|
|
|
|
return;
|
|
}
|