freebsd-skq/sys/dev/rtwn/usb/rtwn_usb_tx.c
avos 9219d5714b rtwn_usb: reject too long (>16K) mbufs.
While here move RTWN_TXBUFSZ constant from common to USB specific code
(it's not used anywhere else).
2017-07-04 07:07:08 +00:00

286 lines
7.2 KiB
C

/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
/*-
* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/ethernet.h>
#include <net/if_media.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_ratectl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/rtwn/if_rtwnreg.h>
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_beacon.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_ridx.h>
#include <dev/rtwn/if_rtwn_task.h>
#include <dev/rtwn/if_rtwn_tx.h>
#include <dev/rtwn/usb/rtwn_usb_var.h>
#include <dev/rtwn/usb/rtwn_usb_reg.h>
#include <dev/rtwn/usb/rtwn_usb_tx.h>
static struct rtwn_data * _rtwn_usb_getbuf(struct rtwn_usb_softc *);
static struct rtwn_data * rtwn_usb_getbuf(struct rtwn_usb_softc *);
static void rtwn_usb_txeof(struct rtwn_usb_softc *,
struct rtwn_data *, int);
static const uint8_t wme2qid[] =
{ RTWN_BULK_TX_BE, RTWN_BULK_TX_BK,
RTWN_BULK_TX_VI, RTWN_BULK_TX_VO };
static struct rtwn_data *
_rtwn_usb_getbuf(struct rtwn_usb_softc *uc)
{
struct rtwn_softc *sc = &uc->uc_sc;
struct rtwn_data *bf;
bf = STAILQ_FIRST(&uc->uc_tx_inactive);
if (bf != NULL)
STAILQ_REMOVE_HEAD(&uc->uc_tx_inactive, next);
else {
RTWN_DPRINTF(sc, RTWN_DEBUG_XMIT,
"%s: out of xmit buffers\n", __func__);
}
return (bf);
}
static struct rtwn_data *
rtwn_usb_getbuf(struct rtwn_usb_softc *uc)
{
struct rtwn_softc *sc = &uc->uc_sc;
struct rtwn_data *bf;
RTWN_ASSERT_LOCKED(sc);
bf = _rtwn_usb_getbuf(uc);
if (bf == NULL) {
RTWN_DPRINTF(sc, RTWN_DEBUG_XMIT, "%s: stop queue\n",
__func__);
}
return (bf);
}
static void
rtwn_usb_txeof(struct rtwn_usb_softc *uc, struct rtwn_data *data, int status)
{
struct rtwn_softc *sc = &uc->uc_sc;
RTWN_ASSERT_LOCKED(sc);
if (data->ni != NULL) /* not a beacon frame */
ieee80211_tx_complete(data->ni, data->m, status);
if (sc->sc_ratectl != RTWN_RATECTL_NET80211)
if (sc->sc_tx_n_active > 0)
sc->sc_tx_n_active--;
data->ni = NULL;
data->m = NULL;
STAILQ_INSERT_TAIL(&uc->uc_tx_inactive, data, next);
sc->qfullmsk = 0;
#ifndef D4054
if (STAILQ_EMPTY(&uc->uc_tx_active) && STAILQ_EMPTY(&uc->uc_tx_pending))
sc->sc_tx_timer = 0;
else
sc->sc_tx_timer = 5;
#endif
}
void
rtwn_bulk_tx_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct rtwn_usb_softc *uc = usbd_xfer_softc(xfer);
struct rtwn_softc *sc = &uc->uc_sc;
struct rtwn_data *data;
RTWN_ASSERT_LOCKED(sc);
switch (USB_GET_STATE(xfer)){
case USB_ST_TRANSFERRED:
data = STAILQ_FIRST(&uc->uc_tx_active);
if (data == NULL)
goto tr_setup;
STAILQ_REMOVE_HEAD(&uc->uc_tx_active, next);
rtwn_usb_txeof(uc, data, 0);
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
data = STAILQ_FIRST(&uc->uc_tx_pending);
if (data == NULL) {
RTWN_DPRINTF(sc, RTWN_DEBUG_XMIT,
"%s: empty pending queue\n", __func__);
sc->sc_tx_n_active = 0;
goto finish;
}
STAILQ_REMOVE_HEAD(&uc->uc_tx_pending, next);
STAILQ_INSERT_TAIL(&uc->uc_tx_active, data, next);
/*
* Note: if this is a beacon frame, ensure that it will go
* into appropriate queue.
*/
if (data->ni == NULL && RTWN_CHIP_HAS_BCNQ1(sc))
rtwn_switch_bcnq(sc, data->id);
usbd_xfer_set_frame_data(xfer, 0, data->buf, data->buflen);
usbd_transfer_submit(xfer);
if (sc->sc_ratectl != RTWN_RATECTL_NET80211)
sc->sc_tx_n_active++;
break;
default:
data = STAILQ_FIRST(&uc->uc_tx_active);
if (data == NULL)
goto tr_setup;
STAILQ_REMOVE_HEAD(&uc->uc_tx_active, next);
rtwn_usb_txeof(uc, data, 1);
if (error != USB_ERR_CANCELLED) {
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
finish:
#ifdef IEEE80211_SUPPORT_SUPERG
/*
* If the TX active queue drops below a certain
* threshold, ensure we age fast-frames out so they're
* transmitted.
*/
if (sc->sc_ratectl != RTWN_RATECTL_NET80211 &&
sc->sc_tx_n_active <= 1) {
/* XXX ew - net80211 should defer this for us! */
/*
* Note: this sc_tx_n_active currently tracks
* the number of pending transmit submissions
* and not the actual depth of the TX frames
* pending to the hardware. That means that
* we're going to end up with some sub-optimal
* aggregation behaviour.
*/
/*
* XXX TODO: just make this a callout timer schedule so we can
* flush the FF staging queue if we're approaching idle.
*/
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
}
#endif
/* Kick-start more transmit */
rtwn_start(sc);
}
static void
rtwn_usb_tx_checksum(struct rtwn_tx_desc_common *txd)
{
txd->txdw7.usb_checksum = 0;
txd->txdw7.usb_checksum = rtwn_usb_calc_tx_checksum(txd);
}
int
rtwn_usb_tx_start(struct rtwn_softc *sc, struct ieee80211_node *ni,
struct mbuf *m, uint8_t *tx_desc, uint8_t type, int id)
{
struct rtwn_usb_softc *uc = RTWN_USB_SOFTC(sc);
struct rtwn_tx_desc_common *txd;
struct rtwn_data *data;
struct usb_xfer *xfer;
uint16_t ac;
RTWN_ASSERT_LOCKED(sc);
if (m->m_pkthdr.len + sc->txdesc_len > RTWN_USB_TXBUFSZ)
return (EINVAL);
data = rtwn_usb_getbuf(uc);
if (data == NULL)
return (ENOBUFS);
ac = M_WME_GETAC(m);
switch (type) {
case IEEE80211_FC0_TYPE_CTL:
case IEEE80211_FC0_TYPE_MGT:
xfer = uc->uc_xfer[RTWN_BULK_TX_VO];
break;
default:
xfer = uc->uc_xfer[wme2qid[ac]];
break;
}
txd = (struct rtwn_tx_desc_common *)tx_desc;
txd->pktlen = htole16(m->m_pkthdr.len);
txd->offset = sc->txdesc_len;
txd->flags0 |= RTWN_FLAGS0_OWN;
rtwn_usb_tx_checksum(txd);
/* Dump Tx descriptor. */
rtwn_dump_tx_desc(sc, tx_desc);
memcpy(data->buf, tx_desc, sc->txdesc_len);
m_copydata(m, 0, m->m_pkthdr.len,
(caddr_t)(data->buf + sc->txdesc_len));
data->buflen = m->m_pkthdr.len + sc->txdesc_len;
data->id = id;
data->ni = ni;
if (data->ni != NULL) {
data->m = m;
#ifndef D4054
sc->sc_tx_timer = 5;
#endif
}
STAILQ_INSERT_TAIL(&uc->uc_tx_pending, data, next);
if (STAILQ_EMPTY(&uc->uc_tx_inactive))
sc->qfullmsk = 1;
usbd_transfer_start(xfer);
return (0);
}