b262697660
for usb. I hope that this will eventually be used for generic devices that need full fledged blocking threads for event processing. Create a taskqueue: void usb_ether_task_init(device_t, int, struct usb_taskqueue *); Enqueue a task: void usb_ether_task_enqueue(struct usb_taskqueue *, struct task *); Wait for all tasks queued to complete: void usb_ether_task_drain(struct usb_taskqueue *, struct task *); Destroy the taskqueue: void usb_ether_task_destroy(struct usb_taskqueue *);
279 lines
6.7 KiB
C
279 lines
6.7 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* 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 <sys/taskqueue.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>
|
|
|
|
static struct ifqueue usbq_rx;
|
|
static struct ifqueue usbq_tx;
|
|
static int mtx_inited = 0;
|
|
|
|
static void usbintr (void);
|
|
|
|
static void
|
|
usbintr(void)
|
|
{
|
|
struct mbuf *m;
|
|
struct usb_qdat *q;
|
|
struct ifnet *ifp;
|
|
|
|
/* Check the RX queue */
|
|
while(1) {
|
|
IF_DEQUEUE(&usbq_rx, m);
|
|
if (m == NULL)
|
|
break;
|
|
q = (struct usb_qdat *)m->m_pkthdr.rcvif;
|
|
ifp = q->ifp;
|
|
m->m_pkthdr.rcvif = ifp;
|
|
(*ifp->if_input)(ifp, 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) {
|
|
IF_DEQUEUE(&usbq_tx, m);
|
|
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(void)
|
|
{
|
|
if (mtx_inited)
|
|
return;
|
|
netisr_register(NETISR_USB, (netisr_t *)usbintr, NULL, 0);
|
|
mtx_init(&usbq_tx.ifq_mtx, "usbq_tx_mtx", NULL, MTX_DEF);
|
|
mtx_init(&usbq_rx.ifq_mtx, "usbq_rx_mtx", NULL, MTX_DEF);
|
|
mtx_inited++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Must be called at splusb() (actually splbio()). This should be
|
|
* the case when called from a transfer callback routine.
|
|
*/
|
|
void
|
|
usb_ether_input(m)
|
|
struct mbuf *m;
|
|
{
|
|
IF_ENQUEUE(&usbq_rx, m);
|
|
schednetisr(NETISR_USB);
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
usb_tx_done(m)
|
|
struct mbuf *m;
|
|
{
|
|
IF_ENQUEUE(&usbq_tx, m);
|
|
schednetisr(NETISR_USB);
|
|
|
|
return;
|
|
}
|
|
|
|
struct mbuf *
|
|
usb_ether_newbuf(void)
|
|
{
|
|
struct mbuf *m_new;
|
|
|
|
m_new = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
|
|
if (m_new == NULL)
|
|
return (NULL);
|
|
m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
|
|
|
|
m_adj(m_new, ETHER_ALIGN);
|
|
return (m_new);
|
|
}
|
|
|
|
int
|
|
usb_ether_rx_list_init(void *sc, struct ue_cdata *cd,
|
|
usbd_device_handle ue_udev)
|
|
{
|
|
struct ue_chain *c;
|
|
int i;
|
|
|
|
for (i = 0; i < UE_RX_LIST_CNT; i++) {
|
|
c = &cd->ue_rx_chain[i];
|
|
c->ue_sc = sc;
|
|
c->ue_idx = i;
|
|
c->ue_mbuf = usb_ether_newbuf();
|
|
if (c->ue_mbuf == NULL)
|
|
return (ENOBUFS);
|
|
if (c->ue_xfer == NULL) {
|
|
c->ue_xfer = usbd_alloc_xfer(ue_udev);
|
|
if (c->ue_xfer == NULL)
|
|
return (ENOBUFS);
|
|
c->ue_buf = usbd_alloc_buffer(c->ue_xfer, UE_BUFSZ);
|
|
if (c->ue_buf == NULL)
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
usb_ether_tx_list_init(void *sc, struct ue_cdata *cd,
|
|
usbd_device_handle ue_udev)
|
|
{
|
|
struct ue_chain *c;
|
|
int i;
|
|
|
|
for (i = 0; i < UE_TX_LIST_CNT; i++) {
|
|
c = &cd->ue_tx_chain[i];
|
|
c->ue_sc = sc;
|
|
c->ue_idx = i;
|
|
c->ue_mbuf = NULL;
|
|
if (c->ue_xfer == NULL) {
|
|
c->ue_xfer = usbd_alloc_xfer(ue_udev);
|
|
if (c->ue_xfer == NULL)
|
|
return (ENOBUFS);
|
|
c->ue_buf = usbd_alloc_buffer(c->ue_xfer, UE_BUFSZ);
|
|
if (c->ue_buf == NULL)
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
usb_ether_rx_list_free(struct ue_cdata *cd)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UE_RX_LIST_CNT; i++) {
|
|
if (cd->ue_rx_chain[i].ue_mbuf != NULL) {
|
|
m_freem(cd->ue_rx_chain[i].ue_mbuf);
|
|
cd->ue_rx_chain[i].ue_mbuf = NULL;
|
|
}
|
|
if (cd->ue_rx_chain[i].ue_xfer != NULL) {
|
|
usbd_free_xfer(cd->ue_rx_chain[i].ue_xfer);
|
|
cd->ue_rx_chain[i].ue_xfer = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
usb_ether_tx_list_free(struct ue_cdata *cd)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UE_RX_LIST_CNT; i++) {
|
|
if (cd->ue_tx_chain[i].ue_mbuf != NULL) {
|
|
m_freem(cd->ue_tx_chain[i].ue_mbuf);
|
|
cd->ue_tx_chain[i].ue_mbuf = NULL;
|
|
}
|
|
if (cd->ue_tx_chain[i].ue_xfer != NULL) {
|
|
usbd_free_xfer(cd->ue_tx_chain[i].ue_xfer);
|
|
cd->ue_tx_chain[i].ue_xfer = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
usb_ether_task_init(device_t dev, int flags, struct usb_taskqueue *tq)
|
|
{
|
|
|
|
/* nothing for now. */
|
|
}
|
|
|
|
void
|
|
usb_ether_task_enqueue(struct usb_taskqueue *tq, struct task *task)
|
|
{
|
|
|
|
taskqueue_enqueue(taskqueue_thread, task);
|
|
}
|
|
|
|
void
|
|
usb_ether_task_drain(struct usb_taskqueue *tq, struct task *task)
|
|
{
|
|
|
|
taskqueue_drain(taskqueue_thread, task);
|
|
}
|
|
|
|
void
|
|
usb_ether_task_destroy(struct usb_taskqueue *tq)
|
|
{
|
|
|
|
/* nothing for now */
|
|
|
|
}
|