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freebsd-skq/sys/dev/malo/if_malo.c
Maxim Sobolev e50d35e6c6 Add new tunable 'net.link.ifqmaxlen' to set default send interface 
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after:	1 month
2010-05-03 07:32:50 +00:00

2292 lines
61 KiB
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/*-
* Copyright (c) 2008 Weongyo Jeong <weongyo@freebsd.org>
* Copyright (c) 2007 Marvell Semiconductor, Inc.
* Copyright (c) 2007 Sam Leffler, Errno Consulting
* 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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
#ifdef __FreeBSD__
__FBSDID("$FreeBSD$");
#endif
#include "opt_malo.h"
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
#include <net/bpf.h>
#include <dev/malo/if_malo.h>
SYSCTL_NODE(_hw, OID_AUTO, malo, CTLFLAG_RD, 0,
"Marvell 88w8335 driver parameters");
static int malo_txcoalesce = 8; /* # tx pkts to q before poking f/w*/
SYSCTL_INT(_hw_malo, OID_AUTO, txcoalesce, CTLFLAG_RW, &malo_txcoalesce,
0, "tx buffers to send at once");
TUNABLE_INT("hw.malo.txcoalesce", &malo_txcoalesce);
static int malo_rxbuf = MALO_RXBUF; /* # rx buffers to allocate */
SYSCTL_INT(_hw_malo, OID_AUTO, rxbuf, CTLFLAG_RW, &malo_rxbuf,
0, "rx buffers allocated");
TUNABLE_INT("hw.malo.rxbuf", &malo_rxbuf);
static int malo_rxquota = MALO_RXBUF; /* # max buffers to process */
SYSCTL_INT(_hw_malo, OID_AUTO, rxquota, CTLFLAG_RW, &malo_rxquota,
0, "max rx buffers to process per interrupt");
TUNABLE_INT("hw.malo.rxquota", &malo_rxquota);
static int malo_txbuf = MALO_TXBUF; /* # tx buffers to allocate */
SYSCTL_INT(_hw_malo, OID_AUTO, txbuf, CTLFLAG_RW, &malo_txbuf,
0, "tx buffers allocated");
TUNABLE_INT("hw.malo.txbuf", &malo_txbuf);
#ifdef MALO_DEBUG
static int malo_debug = 0;
SYSCTL_INT(_hw_malo, OID_AUTO, debug, CTLFLAG_RW, &malo_debug,
0, "control debugging printfs");
TUNABLE_INT("hw.malo.debug", &malo_debug);
enum {
MALO_DEBUG_XMIT = 0x00000001, /* basic xmit operation */
MALO_DEBUG_XMIT_DESC = 0x00000002, /* xmit descriptors */
MALO_DEBUG_RECV = 0x00000004, /* basic recv operation */
MALO_DEBUG_RECV_DESC = 0x00000008, /* recv descriptors */
MALO_DEBUG_RESET = 0x00000010, /* reset processing */
MALO_DEBUG_INTR = 0x00000040, /* ISR */
MALO_DEBUG_TX_PROC = 0x00000080, /* tx ISR proc */
MALO_DEBUG_RX_PROC = 0x00000100, /* rx ISR proc */
MALO_DEBUG_STATE = 0x00000400, /* 802.11 state transitions */
MALO_DEBUG_NODE = 0x00000800, /* node management */
MALO_DEBUG_RECV_ALL = 0x00001000, /* trace all frames (beacons) */
MALO_DEBUG_FW = 0x00008000, /* firmware */
MALO_DEBUG_ANY = 0xffffffff
};
#define IS_BEACON(wh) \
((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK | \
IEEE80211_FC0_SUBTYPE_MASK)) == \
(IEEE80211_FC0_TYPE_MGT|IEEE80211_FC0_SUBTYPE_BEACON))
#define IFF_DUMPPKTS_RECV(sc, wh) \
(((sc->malo_debug & MALO_DEBUG_RECV) && \
((sc->malo_debug & MALO_DEBUG_RECV_ALL) || !IS_BEACON(wh))) || \
(sc->malo_ifp->if_flags & (IFF_DEBUG|IFF_LINK2)) == \
(IFF_DEBUG|IFF_LINK2))
#define IFF_DUMPPKTS_XMIT(sc) \
((sc->malo_debug & MALO_DEBUG_XMIT) || \
(sc->malo_ifp->if_flags & (IFF_DEBUG | IFF_LINK2)) == \
(IFF_DEBUG | IFF_LINK2))
#define DPRINTF(sc, m, fmt, ...) do { \
if (sc->malo_debug & (m)) \
printf(fmt, __VA_ARGS__); \
} while (0)
#else
#define DPRINTF(sc, m, fmt, ...) do { \
(void) sc; \
} while (0)
#endif
MALLOC_DEFINE(M_MALODEV, "malodev", "malo driver dma buffers");
static struct ieee80211vap *malo_vap_create(struct ieee80211com *ic,
const char name[IFNAMSIZ], int unit, int opmode, int flags,
const uint8_t bssid[IEEE80211_ADDR_LEN],
const uint8_t mac[IEEE80211_ADDR_LEN]);
static void malo_vap_delete(struct ieee80211vap *);
static int malo_dma_setup(struct malo_softc *);
static int malo_setup_hwdma(struct malo_softc *);
static void malo_txq_init(struct malo_softc *, struct malo_txq *, int);
static void malo_tx_cleanupq(struct malo_softc *, struct malo_txq *);
static void malo_start(struct ifnet *);
static void malo_watchdog(void *);
static int malo_ioctl(struct ifnet *, u_long, caddr_t);
static void malo_updateslot(struct ifnet *);
static int malo_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static void malo_scan_start(struct ieee80211com *);
static void malo_scan_end(struct ieee80211com *);
static void malo_set_channel(struct ieee80211com *);
static int malo_raw_xmit(struct ieee80211_node *, struct mbuf *,
const struct ieee80211_bpf_params *);
static void malo_sysctlattach(struct malo_softc *);
static void malo_announce(struct malo_softc *);
static void malo_dma_cleanup(struct malo_softc *);
static void malo_stop_locked(struct ifnet *, int);
static int malo_chan_set(struct malo_softc *, struct ieee80211_channel *);
static int malo_mode_init(struct malo_softc *);
static void malo_tx_proc(void *, int);
static void malo_rx_proc(void *, int);
static void malo_init(void *);
/*
* Read/Write shorthands for accesses to BAR 0. Note that all BAR 1
* operations are done in the "hal" except getting H/W MAC address at
* malo_attach and there should be no reference to them here.
*/
static uint32_t
malo_bar0_read4(struct malo_softc *sc, bus_size_t off)
{
return bus_space_read_4(sc->malo_io0t, sc->malo_io0h, off);
}
static void
malo_bar0_write4(struct malo_softc *sc, bus_size_t off, uint32_t val)
{
DPRINTF(sc, MALO_DEBUG_FW, "%s: off 0x%jx val 0x%x\n",
__func__, (intmax_t)off, val);
bus_space_write_4(sc->malo_io0t, sc->malo_io0h, off, val);
}
int
malo_attach(uint16_t devid, struct malo_softc *sc)
{
int error;
struct ieee80211com *ic;
struct ifnet *ifp;
struct malo_hal *mh;
uint8_t bands;
ifp = sc->malo_ifp = if_alloc(IFT_IEEE80211);
if (ifp == NULL) {
device_printf(sc->malo_dev, "can not if_alloc()\n");
return ENOSPC;
}
ic = ifp->if_l2com;
MALO_LOCK_INIT(sc);
callout_init_mtx(&sc->malo_watchdog_timer, &sc->malo_mtx, 0);
/* set these up early for if_printf use */
if_initname(ifp, device_get_name(sc->malo_dev),
device_get_unit(sc->malo_dev));
mh = malo_hal_attach(sc->malo_dev, devid,
sc->malo_io1h, sc->malo_io1t, sc->malo_dmat);
if (mh == NULL) {
if_printf(ifp, "unable to attach HAL\n");
error = EIO;
goto bad;
}
sc->malo_mh = mh;
/*
* Load firmware so we can get setup. We arbitrarily pick station
* firmware; we'll re-load firmware as needed so setting up
* the wrong mode isn't a big deal.
*/
error = malo_hal_fwload(mh, "malo8335-h", "malo8335-m");
if (error != 0) {
if_printf(ifp, "unable to setup firmware\n");
goto bad1;
}
/* XXX gethwspecs() extracts correct informations? not maybe! */
error = malo_hal_gethwspecs(mh, &sc->malo_hwspecs);
if (error != 0) {
if_printf(ifp, "unable to fetch h/w specs\n");
goto bad1;
}
DPRINTF(sc, MALO_DEBUG_FW,
"malo_hal_gethwspecs: hwversion 0x%x hostif 0x%x"
"maxnum_wcb 0x%x maxnum_mcaddr 0x%x maxnum_tx_wcb 0x%x"
"regioncode 0x%x num_antenna 0x%x fw_releasenum 0x%x"
"wcbbase0 0x%x rxdesc_read 0x%x rxdesc_write 0x%x"
"ul_fw_awakecookie 0x%x w[4] = %x %x %x %x",
sc->malo_hwspecs.hwversion,
sc->malo_hwspecs.hostinterface, sc->malo_hwspecs.maxnum_wcb,
sc->malo_hwspecs.maxnum_mcaddr, sc->malo_hwspecs.maxnum_tx_wcb,
sc->malo_hwspecs.regioncode, sc->malo_hwspecs.num_antenna,
sc->malo_hwspecs.fw_releasenum, sc->malo_hwspecs.wcbbase0,
sc->malo_hwspecs.rxdesc_read, sc->malo_hwspecs.rxdesc_write,
sc->malo_hwspecs.ul_fw_awakecookie,
sc->malo_hwspecs.wcbbase[0], sc->malo_hwspecs.wcbbase[1],
sc->malo_hwspecs.wcbbase[2], sc->malo_hwspecs.wcbbase[3]);
/* NB: firmware looks that it does not export regdomain info API. */
bands = 0;
setbit(&bands, IEEE80211_MODE_11B);
setbit(&bands, IEEE80211_MODE_11G);
ieee80211_init_channels(ic, NULL, &bands);
sc->malo_txantenna = 0x2; /* h/w default */
sc->malo_rxantenna = 0xffff; /* h/w default */
/*
* Allocate tx + rx descriptors and populate the lists.
* We immediately push the information to the firmware
* as otherwise it gets upset.
*/
error = malo_dma_setup(sc);
if (error != 0) {
if_printf(ifp, "failed to setup descriptors: %d\n", error);
goto bad1;
}
error = malo_setup_hwdma(sc); /* push to firmware */
if (error != 0) /* NB: malo_setupdma prints msg */
goto bad2;
sc->malo_tq = taskqueue_create_fast("malo_taskq", M_NOWAIT,
taskqueue_thread_enqueue, &sc->malo_tq);
taskqueue_start_threads(&sc->malo_tq, 1, PI_NET,
"%s taskq", ifp->if_xname);
TASK_INIT(&sc->malo_rxtask, 0, malo_rx_proc, sc);
TASK_INIT(&sc->malo_txtask, 0, malo_tx_proc, sc);
ifp->if_softc = sc;
ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
ifp->if_start = malo_start;
ifp->if_ioctl = malo_ioctl;
ifp->if_init = malo_init;
IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
IFQ_SET_READY(&ifp->if_snd);
ic->ic_ifp = ifp;
/* XXX not right but it's not used anywhere important */
ic->ic_phytype = IEEE80211_T_OFDM;
ic->ic_opmode = IEEE80211_M_STA;
ic->ic_caps =
IEEE80211_C_STA /* station mode supported */
| IEEE80211_C_BGSCAN /* capable of bg scanning */
| IEEE80211_C_MONITOR /* monitor mode */
| IEEE80211_C_SHPREAMBLE /* short preamble supported */
| IEEE80211_C_SHSLOT /* short slot time supported */
| IEEE80211_C_TXPMGT /* capable of txpow mgt */
| IEEE80211_C_WPA /* capable of WPA1+WPA2 */
;
/*
* Transmit requires space in the packet for a special format transmit
* record and optional padding between this record and the payload.
* Ask the net80211 layer to arrange this when encapsulating
* packets so we can add it efficiently.
*/
ic->ic_headroom = sizeof(struct malo_txrec) -
sizeof(struct ieee80211_frame);
/* call MI attach routine. */
ieee80211_ifattach(ic, sc->malo_hwspecs.macaddr);
/* override default methods */
ic->ic_vap_create = malo_vap_create;
ic->ic_vap_delete = malo_vap_delete;
ic->ic_raw_xmit = malo_raw_xmit;
ic->ic_updateslot = malo_updateslot;
ic->ic_scan_start = malo_scan_start;
ic->ic_scan_end = malo_scan_end;
ic->ic_set_channel = malo_set_channel;
sc->malo_invalid = 0; /* ready to go, enable int handling */
ieee80211_radiotap_attach(ic,
&sc->malo_tx_th.wt_ihdr, sizeof(sc->malo_tx_th),
MALO_TX_RADIOTAP_PRESENT,
&sc->malo_rx_th.wr_ihdr, sizeof(sc->malo_rx_th),
MALO_RX_RADIOTAP_PRESENT);
/*
* Setup dynamic sysctl's.
*/
malo_sysctlattach(sc);
if (bootverbose)
ieee80211_announce(ic);
malo_announce(sc);
return 0;
bad2:
malo_dma_cleanup(sc);
bad1:
malo_hal_detach(mh);
bad:
if_free(ifp);
sc->malo_invalid = 1;
return error;
}
static struct ieee80211vap *
malo_vap_create(struct ieee80211com *ic,
const char name[IFNAMSIZ], int unit, int opmode, int flags,
const uint8_t bssid[IEEE80211_ADDR_LEN],
const uint8_t mac[IEEE80211_ADDR_LEN])
{
struct ifnet *ifp = ic->ic_ifp;
struct malo_vap *mvp;
struct ieee80211vap *vap;
if (!TAILQ_EMPTY(&ic->ic_vaps)) {
if_printf(ifp, "multiple vaps not supported\n");
return NULL;
}
switch (opmode) {
case IEEE80211_M_STA:
if (opmode == IEEE80211_M_STA)
flags |= IEEE80211_CLONE_NOBEACONS;
/* fall thru... */
case IEEE80211_M_MONITOR:
break;
default:
if_printf(ifp, "%s mode not supported\n",
ieee80211_opmode_name[opmode]);
return NULL; /* unsupported */
}
mvp = (struct malo_vap *) malloc(sizeof(struct malo_vap),
M_80211_VAP, M_NOWAIT | M_ZERO);
if (mvp == NULL) {
if_printf(ifp, "cannot allocate vap state block\n");
return NULL;
}
vap = &mvp->malo_vap;
ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
/* override state transition machine */
mvp->malo_newstate = vap->iv_newstate;
vap->iv_newstate = malo_newstate;
/* complete setup */
ieee80211_vap_attach(vap,
ieee80211_media_change, ieee80211_media_status);
ic->ic_opmode = opmode;
return vap;
}
static void
malo_vap_delete(struct ieee80211vap *vap)
{
struct malo_vap *mvp = MALO_VAP(vap);
ieee80211_vap_detach(vap);
free(mvp, M_80211_VAP);
}
int
malo_intr(void *arg)
{
struct malo_softc *sc = arg;
struct malo_hal *mh = sc->malo_mh;
uint32_t status;
if (sc->malo_invalid) {
/*
* The hardware is not ready/present, don't touch anything.
* Note this can happen early on if the IRQ is shared.
*/
DPRINTF(sc, MALO_DEBUG_ANY, "%s: invalid; ignored\n", __func__);
return (FILTER_STRAY);
}
/*
* Figure out the reason(s) for the interrupt.
*/
malo_hal_getisr(mh, &status); /* NB: clears ISR too */
if (status == 0) /* must be a shared irq */
return (FILTER_STRAY);
DPRINTF(sc, MALO_DEBUG_INTR, "%s: status 0x%x imask 0x%x\n",
__func__, status, sc->malo_imask);
if (status & MALO_A2HRIC_BIT_RX_RDY)
taskqueue_enqueue_fast(sc->malo_tq, &sc->malo_rxtask);
if (status & MALO_A2HRIC_BIT_TX_DONE)
taskqueue_enqueue_fast(sc->malo_tq, &sc->malo_txtask);
if (status & MALO_A2HRIC_BIT_OPC_DONE)
malo_hal_cmddone(mh);
if (status & MALO_A2HRIC_BIT_MAC_EVENT)
;
if (status & MALO_A2HRIC_BIT_RX_PROBLEM)
;
if (status & MALO_A2HRIC_BIT_ICV_ERROR) {
/* TKIP ICV error */
sc->malo_stats.mst_rx_badtkipicv++;
}
#ifdef MALO_DEBUG
if (((status | sc->malo_imask) ^ sc->malo_imask) != 0)
DPRINTF(sc, MALO_DEBUG_INTR,
"%s: can't handle interrupt status 0x%x\n",
__func__, status);
#endif
return (FILTER_HANDLED);
}
static void
malo_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
bus_addr_t *paddr = (bus_addr_t*) arg;
KASSERT(error == 0, ("error %u on bus_dma callback", error));
*paddr = segs->ds_addr;
}
static int
malo_desc_setup(struct malo_softc *sc, const char *name,
struct malo_descdma *dd,
int nbuf, size_t bufsize, int ndesc, size_t descsize)
{
int error;
struct ifnet *ifp = sc->malo_ifp;
uint8_t *ds;
DPRINTF(sc, MALO_DEBUG_RESET,
"%s: %s DMA: %u bufs (%ju) %u desc/buf (%ju)\n",
__func__, name, nbuf, (uintmax_t) bufsize,
ndesc, (uintmax_t) descsize);
dd->dd_name = name;
dd->dd_desc_len = nbuf * ndesc * descsize;
/*
* Setup DMA descriptor area.
*/
error = bus_dma_tag_create(bus_get_dma_tag(sc->malo_dev),/* parent */
PAGE_SIZE, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
dd->dd_desc_len, /* maxsize */
1, /* nsegments */
dd->dd_desc_len, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&dd->dd_dmat);
if (error != 0) {
if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name);
return error;
}
/* allocate descriptors */
error = bus_dmamap_create(dd->dd_dmat, BUS_DMA_NOWAIT, &dd->dd_dmamap);
if (error != 0) {
if_printf(ifp, "unable to create dmamap for %s descriptors, "
"error %u\n", dd->dd_name, error);
goto fail0;
}
error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dd->dd_dmamap);
if (error != 0) {
if_printf(ifp, "unable to alloc memory for %u %s descriptors, "
"error %u\n", nbuf * ndesc, dd->dd_name, error);
goto fail1;
}
error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap,
dd->dd_desc, dd->dd_desc_len,
malo_load_cb, &dd->dd_desc_paddr, BUS_DMA_NOWAIT);
if (error != 0) {
if_printf(ifp, "unable to map %s descriptors, error %u\n",
dd->dd_name, error);
goto fail2;
}
ds = dd->dd_desc;
memset(ds, 0, dd->dd_desc_len);
DPRINTF(sc, MALO_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n",
__func__, dd->dd_name, ds, (u_long) dd->dd_desc_len,
(caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len);
return 0;
fail2:
bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
fail1:
bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
fail0:
bus_dma_tag_destroy(dd->dd_dmat);
memset(dd, 0, sizeof(*dd));
return error;
}
#define DS2PHYS(_dd, _ds) \
((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
static int
malo_rxdma_setup(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
int error, bsize, i;
struct malo_rxbuf *bf;
struct malo_rxdesc *ds;
error = malo_desc_setup(sc, "rx", &sc->malo_rxdma,
malo_rxbuf, sizeof(struct malo_rxbuf),
1, sizeof(struct malo_rxdesc));
if (error != 0)
return error;
/*
* Allocate rx buffers and set them up.
*/
bsize = malo_rxbuf * sizeof(struct malo_rxbuf);
bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
if (bf == NULL) {
if_printf(ifp, "malloc of %u rx buffers failed\n", bsize);
return error;
}
sc->malo_rxdma.dd_bufptr = bf;
STAILQ_INIT(&sc->malo_rxbuf);
ds = sc->malo_rxdma.dd_desc;
for (i = 0; i < malo_rxbuf; i++, bf++, ds++) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(&sc->malo_rxdma, ds);
error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
&bf->bf_dmamap);
if (error != 0) {
if_printf(ifp, "%s: unable to dmamap for rx buffer, "
"error %d\n", __func__, error);
return error;
}
/* NB: tail is intentional to preserve descriptor order */
STAILQ_INSERT_TAIL(&sc->malo_rxbuf, bf, bf_list);
}
return 0;
}
static int
malo_txdma_setup(struct malo_softc *sc, struct malo_txq *txq)
{
struct ifnet *ifp = sc->malo_ifp;
int error, bsize, i;
struct malo_txbuf *bf;
struct malo_txdesc *ds;
error = malo_desc_setup(sc, "tx", &txq->dma,
malo_txbuf, sizeof(struct malo_txbuf),
MALO_TXDESC, sizeof(struct malo_txdesc));
if (error != 0)
return error;
/* allocate and setup tx buffers */
bsize = malo_txbuf * sizeof(struct malo_txbuf);
bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
if (bf == NULL) {
if_printf(ifp, "malloc of %u tx buffers failed\n",
malo_txbuf);
return ENOMEM;
}
txq->dma.dd_bufptr = bf;
STAILQ_INIT(&txq->free);
txq->nfree = 0;
ds = txq->dma.dd_desc;
for (i = 0; i < malo_txbuf; i++, bf++, ds += MALO_TXDESC) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(&txq->dma, ds);
error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
&bf->bf_dmamap);
if (error != 0) {
if_printf(ifp, "unable to create dmamap for tx "
"buffer %u, error %u\n", i, error);
return error;
}
STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
txq->nfree++;
}
return 0;
}
static void
malo_desc_cleanup(struct malo_softc *sc, struct malo_descdma *dd)
{
bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
bus_dma_tag_destroy(dd->dd_dmat);
memset(dd, 0, sizeof(*dd));
}
static void
malo_rxdma_cleanup(struct malo_softc *sc)
{
struct malo_rxbuf *bf;
STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
if (bf->bf_m != NULL) {
m_freem(bf->bf_m);
bf->bf_m = NULL;
}
if (bf->bf_dmamap != NULL) {
bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
bf->bf_dmamap = NULL;
}
}
STAILQ_INIT(&sc->malo_rxbuf);
if (sc->malo_rxdma.dd_bufptr != NULL) {
free(sc->malo_rxdma.dd_bufptr, M_MALODEV);
sc->malo_rxdma.dd_bufptr = NULL;
}
if (sc->malo_rxdma.dd_desc_len != 0)
malo_desc_cleanup(sc, &sc->malo_rxdma);
}
static void
malo_txdma_cleanup(struct malo_softc *sc, struct malo_txq *txq)
{
struct malo_txbuf *bf;
struct ieee80211_node *ni;
STAILQ_FOREACH(bf, &txq->free, bf_list) {
if (bf->bf_m != NULL) {
m_freem(bf->bf_m);
bf->bf_m = NULL;
}
ni = bf->bf_node;
bf->bf_node = NULL;
if (ni != NULL) {
/*
* Reclaim node reference.
*/
ieee80211_free_node(ni);
}
if (bf->bf_dmamap != NULL) {
bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
bf->bf_dmamap = NULL;
}
}
STAILQ_INIT(&txq->free);
txq->nfree = 0;
if (txq->dma.dd_bufptr != NULL) {
free(txq->dma.dd_bufptr, M_MALODEV);
txq->dma.dd_bufptr = NULL;
}
if (txq->dma.dd_desc_len != 0)
malo_desc_cleanup(sc, &txq->dma);
}
static void
malo_dma_cleanup(struct malo_softc *sc)
{
int i;
for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
malo_txdma_cleanup(sc, &sc->malo_txq[i]);
malo_rxdma_cleanup(sc);
}
static int
malo_dma_setup(struct malo_softc *sc)
{
int error, i;
/* rxdma initializing. */
error = malo_rxdma_setup(sc);
if (error != 0)
return error;
/* NB: we just have 1 tx queue now. */
for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
error = malo_txdma_setup(sc, &sc->malo_txq[i]);
if (error != 0) {
malo_dma_cleanup(sc);
return error;
}
malo_txq_init(sc, &sc->malo_txq[i], i);
}
return 0;
}
static void
malo_hal_set_rxtxdma(struct malo_softc *sc)
{
int i;
malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read,
sc->malo_hwdma.rxdesc_read);
malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_write,
sc->malo_hwdma.rxdesc_read);
for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
malo_bar0_write4(sc,
sc->malo_hwspecs.wcbbase[i], sc->malo_hwdma.wcbbase[i]);
}
}
/*
* Inform firmware of our tx/rx dma setup. The BAR 0 writes below are
* for compatibility with older firmware. For current firmware we send
* this information with a cmd block via malo_hal_sethwdma.
*/
static int
malo_setup_hwdma(struct malo_softc *sc)
{
int i;
struct malo_txq *txq;
sc->malo_hwdma.rxdesc_read = sc->malo_rxdma.dd_desc_paddr;
for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
txq = &sc->malo_txq[i];
sc->malo_hwdma.wcbbase[i] = txq->dma.dd_desc_paddr;
}
sc->malo_hwdma.maxnum_txwcb = malo_txbuf;
sc->malo_hwdma.maxnum_wcb = MALO_NUM_TX_QUEUES;
malo_hal_set_rxtxdma(sc);
return 0;
}
static void
malo_txq_init(struct malo_softc *sc, struct malo_txq *txq, int qnum)
{
struct malo_txbuf *bf, *bn;
struct malo_txdesc *ds;
MALO_TXQ_LOCK_INIT(sc, txq);
txq->qnum = qnum;
txq->txpri = 0; /* XXX */
STAILQ_FOREACH(bf, &txq->free, bf_list) {
bf->bf_txq = txq;
ds = bf->bf_desc;
bn = STAILQ_NEXT(bf, bf_list);
if (bn == NULL)
bn = STAILQ_FIRST(&txq->free);
ds->physnext = htole32(bn->bf_daddr);
}
STAILQ_INIT(&txq->active);
}
/*
* Reclaim resources for a setup queue.
*/
static void
malo_tx_cleanupq(struct malo_softc *sc, struct malo_txq *txq)
{
/* XXX hal work? */
MALO_TXQ_LOCK_DESTROY(txq);
}
/*
* Allocate a tx buffer for sending a frame.
*/
static struct malo_txbuf *
malo_getbuf(struct malo_softc *sc, struct malo_txq *txq)
{
struct malo_txbuf *bf;
MALO_TXQ_LOCK(txq);
bf = STAILQ_FIRST(&txq->free);
if (bf != NULL) {
STAILQ_REMOVE_HEAD(&txq->free, bf_list);
txq->nfree--;
}
MALO_TXQ_UNLOCK(txq);
if (bf == NULL) {
DPRINTF(sc, MALO_DEBUG_XMIT,
"%s: out of xmit buffers on q %d\n", __func__, txq->qnum);
sc->malo_stats.mst_tx_qstop++;
}
return bf;
}
static int
malo_tx_dmasetup(struct malo_softc *sc, struct malo_txbuf *bf, struct mbuf *m0)
{
struct mbuf *m;
int error;
/*
* Load the DMA map so any coalescing is done. This also calculates
* the number of descriptors we need.
*/
error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
bf->bf_segs, &bf->bf_nseg,
BUS_DMA_NOWAIT);
if (error == EFBIG) {
/* XXX packet requires too many descriptors */
bf->bf_nseg = MALO_TXDESC + 1;
} else if (error != 0) {
sc->malo_stats.mst_tx_busdma++;
m_freem(m0);
return error;
}
/*
* Discard null packets and check for packets that require too many
* TX descriptors. We try to convert the latter to a cluster.
*/
if (error == EFBIG) { /* too many desc's, linearize */
sc->malo_stats.mst_tx_linear++;
m = m_defrag(m0, M_DONTWAIT);
if (m == NULL) {
m_freem(m0);
sc->malo_stats.mst_tx_nombuf++;
return ENOMEM;
}
m0 = m;
error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
bf->bf_segs, &bf->bf_nseg,
BUS_DMA_NOWAIT);
if (error != 0) {
sc->malo_stats.mst_tx_busdma++;
m_freem(m0);
return error;
}
KASSERT(bf->bf_nseg <= MALO_TXDESC,
("too many segments after defrag; nseg %u", bf->bf_nseg));
} else if (bf->bf_nseg == 0) { /* null packet, discard */
sc->malo_stats.mst_tx_nodata++;
m_freem(m0);
return EIO;
}
DPRINTF(sc, MALO_DEBUG_XMIT, "%s: m %p len %u\n",
__func__, m0, m0->m_pkthdr.len);
bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
bf->bf_m = m0;
return 0;
}
#ifdef MALO_DEBUG
static void
malo_printrxbuf(const struct malo_rxbuf *bf, u_int ix)
{
const struct malo_rxdesc *ds = bf->bf_desc;
uint32_t status = le32toh(ds->status);
printf("R[%2u] (DS.V:%p DS.P:%p) NEXT:%08x DATA:%08x RC:%02x%s\n"
" STAT:%02x LEN:%04x SNR:%02x NF:%02x CHAN:%02x"
" RATE:%02x QOS:%04x\n",
ix, ds, (const struct malo_desc *)bf->bf_daddr,
le32toh(ds->physnext), le32toh(ds->physbuffdata),
ds->rxcontrol,
ds->rxcontrol != MALO_RXD_CTRL_DRIVER_OWN ?
"" : (status & MALO_RXD_STATUS_OK) ? " *" : " !",
ds->status, le16toh(ds->pktlen), ds->snr, ds->nf, ds->channel,
ds->rate, le16toh(ds->qosctrl));
}
static void
malo_printtxbuf(const struct malo_txbuf *bf, u_int qnum, u_int ix)
{
const struct malo_txdesc *ds = bf->bf_desc;
uint32_t status = le32toh(ds->status);
printf("Q%u[%3u]", qnum, ix);
printf(" (DS.V:%p DS.P:%p)\n",
ds, (const struct malo_txdesc *)bf->bf_daddr);
printf(" NEXT:%08x DATA:%08x LEN:%04x STAT:%08x%s\n",
le32toh(ds->physnext),
le32toh(ds->pktptr), le16toh(ds->pktlen), status,
status & MALO_TXD_STATUS_USED ?
"" : (status & 3) != 0 ? " *" : " !");
printf(" RATE:%02x PRI:%x QOS:%04x SAP:%08x FORMAT:%04x\n",
ds->datarate, ds->txpriority, le16toh(ds->qosctrl),
le32toh(ds->sap_pktinfo), le16toh(ds->format));
#if 0
{
const uint8_t *cp = (const uint8_t *) ds;
int i;
for (i = 0; i < sizeof(struct malo_txdesc); i++) {
printf("%02x ", cp[i]);
if (((i+1) % 16) == 0)
printf("\n");
}
printf("\n");
}
#endif
}
#endif /* MALO_DEBUG */
static __inline void
malo_updatetxrate(struct ieee80211_node *ni, int rix)
{
#define N(x) (sizeof(x)/sizeof(x[0]))
static const int ieeerates[] =
{ 2, 4, 11, 22, 44, 12, 18, 24, 36, 48, 96, 108 };
if (rix < N(ieeerates))
ni->ni_txrate = ieeerates[rix];
#undef N
}
static int
malo_fix2rate(int fix_rate)
{
#define N(x) (sizeof(x)/sizeof(x[0]))
static const int rates[] =
{ 2, 4, 11, 22, 12, 18, 24, 36, 48, 96, 108 };
return (fix_rate < N(rates) ? rates[fix_rate] : 0);
#undef N
}
/* idiomatic shorthands: MS = mask+shift, SM = shift+mask */
#define MS(v,x) (((v) & x) >> x##_S)
#define SM(v,x) (((v) << x##_S) & x)
/*
* Process completed xmit descriptors from the specified queue.
*/
static int
malo_tx_processq(struct malo_softc *sc, struct malo_txq *txq)
{
struct malo_txbuf *bf;
struct malo_txdesc *ds;
struct ieee80211_node *ni;
int nreaped;
uint32_t status;
DPRINTF(sc, MALO_DEBUG_TX_PROC, "%s: tx queue %u\n",
__func__, txq->qnum);
for (nreaped = 0;; nreaped++) {
MALO_TXQ_LOCK(txq);
bf = STAILQ_FIRST(&txq->active);
if (bf == NULL) {
MALO_TXQ_UNLOCK(txq);
break;
}
ds = bf->bf_desc;
MALO_TXDESC_SYNC(txq, ds,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
if (ds->status & htole32(MALO_TXD_STATUS_FW_OWNED)) {
MALO_TXQ_UNLOCK(txq);
break;
}
STAILQ_REMOVE_HEAD(&txq->active, bf_list);
MALO_TXQ_UNLOCK(txq);
#ifdef MALO_DEBUG
if (sc->malo_debug & MALO_DEBUG_XMIT_DESC)
malo_printtxbuf(bf, txq->qnum, nreaped);
#endif
ni = bf->bf_node;
if (ni != NULL) {
status = le32toh(ds->status);
if (status & MALO_TXD_STATUS_OK) {
uint16_t format = le16toh(ds->format);
uint8_t txant = MS(format, MALO_TXD_ANTENNA);
sc->malo_stats.mst_ant_tx[txant]++;
if (status & MALO_TXD_STATUS_OK_RETRY)
sc->malo_stats.mst_tx_retries++;
if (status & MALO_TXD_STATUS_OK_MORE_RETRY)
sc->malo_stats.mst_tx_mretries++;
malo_updatetxrate(ni, ds->datarate);
sc->malo_stats.mst_tx_rate = ds->datarate;
} else {
if (status & MALO_TXD_STATUS_FAILED_LINK_ERROR)
sc->malo_stats.mst_tx_linkerror++;
if (status & MALO_TXD_STATUS_FAILED_XRETRY)
sc->malo_stats.mst_tx_xretries++;
if (status & MALO_TXD_STATUS_FAILED_AGING)
sc->malo_stats.mst_tx_aging++;
}
/*
* Do any tx complete callback. Note this must
* be done before releasing the node reference.
* XXX no way to figure out if frame was ACK'd
*/
if (bf->bf_m->m_flags & M_TXCB) {
/* XXX strip fw len in case header inspected */
m_adj(bf->bf_m, sizeof(uint16_t));
ieee80211_process_callback(ni, bf->bf_m,
(status & MALO_TXD_STATUS_OK) == 0);
}
/*
* Reclaim reference to node.
*
* NB: the node may be reclaimed here if, for example
* this is a DEAUTH message that was sent and the
* node was timed out due to inactivity.
*/
ieee80211_free_node(ni);
}
ds->status = htole32(MALO_TXD_STATUS_IDLE);
ds->pktlen = htole32(0);
bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
m_freem(bf->bf_m);
bf->bf_m = NULL;
bf->bf_node = NULL;
MALO_TXQ_LOCK(txq);
STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
txq->nfree++;
MALO_TXQ_UNLOCK(txq);
}
return nreaped;
}
/*
* Deferred processing of transmit interrupt.
*/
static void
malo_tx_proc(void *arg, int npending)
{
struct malo_softc *sc = arg;
struct ifnet *ifp = sc->malo_ifp;
int i, nreaped;
/*
* Process each active queue.
*/
nreaped = 0;
for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
if (!STAILQ_EMPTY(&sc->malo_txq[i].active))
nreaped += malo_tx_processq(sc, &sc->malo_txq[i]);
}
if (nreaped != 0) {
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
sc->malo_timer = 0;
malo_start(ifp);
}
}
static int
malo_tx_start(struct malo_softc *sc, struct ieee80211_node *ni,
struct malo_txbuf *bf, struct mbuf *m0)
{
#define IEEE80211_DIR_DSTODS(wh) \
((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
#define IS_DATA_FRAME(wh) \
((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK)) == IEEE80211_FC0_TYPE_DATA)
int error, ismcast, iswep;
int copyhdrlen, hdrlen, pktlen;
struct ieee80211_frame *wh;
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211vap *vap = ni->ni_vap;
struct malo_txdesc *ds;
struct malo_txrec *tr;
struct malo_txq *txq;
uint16_t qos;
wh = mtod(m0, struct ieee80211_frame *);
iswep = wh->i_fc[1] & IEEE80211_FC1_WEP;
ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
copyhdrlen = hdrlen = ieee80211_anyhdrsize(wh);
pktlen = m0->m_pkthdr.len;
if (IEEE80211_QOS_HAS_SEQ(wh)) {
if (IEEE80211_DIR_DSTODS(wh)) {
qos = *(uint16_t *)
(((struct ieee80211_qosframe_addr4 *) wh)->i_qos);
copyhdrlen -= sizeof(qos);
} else
qos = *(uint16_t *)
(((struct ieee80211_qosframe *) wh)->i_qos);
} else
qos = 0;
if (iswep) {
struct ieee80211_key *k;
/*
* Construct the 802.11 header+trailer for an encrypted
* frame. The only reason this can fail is because of an
* unknown or unsupported cipher/key type.
*
* NB: we do this even though the firmware will ignore
* what we've done for WEP and TKIP as we need the
* ExtIV filled in for CCMP and this also adjusts
* the headers which simplifies our work below.
*/
k = ieee80211_crypto_encap(ni, m0);
if (k == NULL) {
/*
* This can happen when the key is yanked after the
* frame was queued. Just discard the frame; the
* 802.11 layer counts failures and provides
* debugging/diagnostics.
*/
m_freem(m0);
return EIO;
}
/*
* Adjust the packet length for the crypto additions
* done during encap and any other bits that the f/w
* will add later on.
*/
pktlen = m0->m_pkthdr.len;
/* packet header may have moved, reset our local pointer */
wh = mtod(m0, struct ieee80211_frame *);
}
if (ieee80211_radiotap_active_vap(vap)) {
sc->malo_tx_th.wt_flags = 0; /* XXX */
if (iswep)
sc->malo_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
sc->malo_tx_th.wt_txpower = ni->ni_txpower;
sc->malo_tx_th.wt_antenna = sc->malo_txantenna;
ieee80211_radiotap_tx(vap, m0);
}
/*
* Copy up/down the 802.11 header; the firmware requires
* we present a 2-byte payload length followed by a
* 4-address header (w/o QoS), followed (optionally) by
* any WEP/ExtIV header (but only filled in for CCMP).
* We are assured the mbuf has sufficient headroom to
* prepend in-place by the setup of ic_headroom in
* malo_attach.
*/
if (hdrlen < sizeof(struct malo_txrec)) {
const int space = sizeof(struct malo_txrec) - hdrlen;
if (M_LEADINGSPACE(m0) < space) {
/* NB: should never happen */
device_printf(sc->malo_dev,
"not enough headroom, need %d found %zd, "
"m_flags 0x%x m_len %d\n",
space, M_LEADINGSPACE(m0), m0->m_flags, m0->m_len);
ieee80211_dump_pkt(ic,
mtod(m0, const uint8_t *), m0->m_len, 0, -1);
m_freem(m0);
/* XXX stat */
return EIO;
}
M_PREPEND(m0, space, M_NOWAIT);
}
tr = mtod(m0, struct malo_txrec *);
if (wh != (struct ieee80211_frame *) &tr->wh)
ovbcopy(wh, &tr->wh, hdrlen);
/*
* Note: the "firmware length" is actually the length of the fully
* formed "802.11 payload". That is, it's everything except for
* the 802.11 header. In particular this includes all crypto
* material including the MIC!
*/
tr->fwlen = htole16(pktlen - hdrlen);
/*
* Load the DMA map so any coalescing is done. This
* also calculates the number of descriptors we need.
*/
error = malo_tx_dmasetup(sc, bf, m0);
if (error != 0)
return error;
bf->bf_node = ni; /* NB: held reference */
m0 = bf->bf_m; /* NB: may have changed */
tr = mtod(m0, struct malo_txrec *);
wh = (struct ieee80211_frame *)&tr->wh;
/*
* Formulate tx descriptor.
*/
ds = bf->bf_desc;
txq = bf->bf_txq;
ds->qosctrl = qos; /* NB: already little-endian */
ds->pktptr = htole32(bf->bf_segs[0].ds_addr);
ds->pktlen = htole16(bf->bf_segs[0].ds_len);
/* NB: pPhysNext setup once, don't touch */
ds->datarate = IS_DATA_FRAME(wh) ? 1 : 0;
ds->sap_pktinfo = 0;
ds->format = 0;
/*
* Select transmit rate.
*/
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_MGT:
sc->malo_stats.mst_tx_mgmt++;
/* fall thru... */
case IEEE80211_FC0_TYPE_CTL:
ds->txpriority = 1;
break;
case IEEE80211_FC0_TYPE_DATA:
ds->txpriority = txq->qnum;
break;
default:
if_printf(ifp, "bogus frame type 0x%x (%s)\n",
wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
/* XXX statistic */
m_freem(m0);
return EIO;
}
#ifdef MALO_DEBUG
if (IFF_DUMPPKTS_XMIT(sc))
ieee80211_dump_pkt(ic,
mtod(m0, const uint8_t *)+sizeof(uint16_t),
m0->m_len - sizeof(uint16_t), ds->datarate, -1);
#endif
MALO_TXQ_LOCK(txq);
if (!IS_DATA_FRAME(wh))
ds->status |= htole32(1);
ds->status |= htole32(MALO_TXD_STATUS_FW_OWNED);
STAILQ_INSERT_TAIL(&txq->active, bf, bf_list);
MALO_TXDESC_SYNC(txq, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
ifp->if_opackets++;
sc->malo_timer = 5;
MALO_TXQ_UNLOCK(txq);
return 0;
#undef IEEE80211_DIR_DSTODS
}
static void
malo_start(struct ifnet *ifp)
{
struct malo_softc *sc = ifp->if_softc;
struct ieee80211_node *ni;
struct malo_txq *txq = &sc->malo_txq[0];
struct malo_txbuf *bf = NULL;
struct mbuf *m;
int nqueued = 0;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid)
return;
for (;;) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
break;
ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
bf = malo_getbuf(sc, txq);
if (bf == NULL) {
IFQ_DRV_PREPEND(&ifp->if_snd, m);
/* XXX blocks other traffic */
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
sc->malo_stats.mst_tx_qstop++;
break;
}
/*
* Pass the frame to the h/w for transmission.
*/
if (malo_tx_start(sc, ni, bf, m)) {
ifp->if_oerrors++;
if (bf != NULL) {
bf->bf_m = NULL;
bf->bf_node = NULL;
MALO_TXQ_LOCK(txq);
STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
MALO_TXQ_UNLOCK(txq);
}
ieee80211_free_node(ni);
continue;
}
nqueued++;
if (nqueued >= malo_txcoalesce) {
/*
* Poke the firmware to process queued frames;
* see below about (lack of) locking.
*/
nqueued = 0;
malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
}
}
if (nqueued) {
/*
* NB: We don't need to lock against tx done because
* this just prods the firmware to check the transmit
* descriptors. The firmware will also start fetching
* descriptors by itself if it notices new ones are
* present when it goes to deliver a tx done interrupt
* to the host. So if we race with tx done processing
* it's ok. Delivering the kick here rather than in
* malo_tx_start is an optimization to avoid poking the
* firmware for each packet.
*
* NB: the queue id isn't used so 0 is ok.
*/
malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
}
}
static void
malo_watchdog(void *arg)
{
struct malo_softc *sc;
struct ifnet *ifp;
sc = arg;
callout_reset(&sc->malo_watchdog_timer, hz, malo_watchdog, sc);
if (sc->malo_timer == 0 || --sc->malo_timer > 0)
return;
ifp = sc->malo_ifp;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) && !sc->malo_invalid) {
if_printf(ifp, "watchdog timeout\n");
/* XXX no way to reset h/w. now */
ifp->if_oerrors++;
sc->malo_stats.mst_watchdog++;
}
}
static int
malo_hal_reset(struct malo_softc *sc)
{
static int first = 0;
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct malo_hal *mh = sc->malo_mh;
if (first == 0) {
/*
* NB: when the device firstly is initialized, sometimes
* firmware could override rx/tx dma registers so we re-set
* these values once.
*/
malo_hal_set_rxtxdma(sc);
first = 1;
}
malo_hal_setantenna(mh, MHA_ANTENNATYPE_RX, sc->malo_rxantenna);
malo_hal_setantenna(mh, MHA_ANTENNATYPE_TX, sc->malo_txantenna);
malo_hal_setradio(mh, 1, MHP_AUTO_PREAMBLE);
malo_chan_set(sc, ic->ic_curchan);
/* XXX needs other stuffs? */
return 1;
}
static __inline struct mbuf *
malo_getrxmbuf(struct malo_softc *sc, struct malo_rxbuf *bf)
{
struct mbuf *m;
bus_addr_t paddr;
int error;
/* XXX don't need mbuf, just dma buffer */
m = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
if (m == NULL) {
sc->malo_stats.mst_rx_nombuf++; /* XXX */
return NULL;
}
error = bus_dmamap_load(sc->malo_dmat, bf->bf_dmamap,
mtod(m, caddr_t), MJUMPAGESIZE,
malo_load_cb, &paddr, BUS_DMA_NOWAIT);
if (error != 0) {
if_printf(sc->malo_ifp,
"%s: bus_dmamap_load failed, error %d\n", __func__, error);
m_freem(m);
return NULL;
}
bf->bf_data = paddr;
bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
return m;
}
static int
malo_rxbuf_init(struct malo_softc *sc, struct malo_rxbuf *bf)
{
struct malo_rxdesc *ds;
ds = bf->bf_desc;
if (bf->bf_m == NULL) {
bf->bf_m = malo_getrxmbuf(sc, bf);
if (bf->bf_m == NULL) {
/* mark descriptor to be skipped */
ds->rxcontrol = MALO_RXD_CTRL_OS_OWN;
/* NB: don't need PREREAD */
MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREWRITE);
return ENOMEM;
}
}
/*
* Setup descriptor.
*/
ds->qosctrl = 0;
ds->snr = 0;
ds->status = MALO_RXD_STATUS_IDLE;
ds->channel = 0;
ds->pktlen = htole16(MALO_RXSIZE);
ds->nf = 0;
ds->physbuffdata = htole32(bf->bf_data);
/* NB: don't touch pPhysNext, set once */
ds->rxcontrol = MALO_RXD_CTRL_DRIVER_OWN;
MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return 0;
}
/*
* Setup the rx data structures. This should only be done once or we may get
* out of sync with the firmware.
*/
static int
malo_startrecv(struct malo_softc *sc)
{
struct malo_rxbuf *bf, *prev;
struct malo_rxdesc *ds;
if (sc->malo_recvsetup == 1) {
malo_mode_init(sc); /* set filters, etc. */
return 0;
}
prev = NULL;
STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
int error = malo_rxbuf_init(sc, bf);
if (error != 0) {
DPRINTF(sc, MALO_DEBUG_RECV,
"%s: malo_rxbuf_init failed %d\n",
__func__, error);
return error;
}
if (prev != NULL) {
ds = prev->bf_desc;
ds->physnext = htole32(bf->bf_daddr);
}
prev = bf;
}
if (prev != NULL) {
ds = prev->bf_desc;
ds->physnext =
htole32(STAILQ_FIRST(&sc->malo_rxbuf)->bf_daddr);
}
sc->malo_recvsetup = 1;
malo_mode_init(sc); /* set filters, etc. */
return 0;
}
static void
malo_init_locked(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
struct malo_hal *mh = sc->malo_mh;
int error;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
__func__, ifp->if_flags);
MALO_LOCK_ASSERT(sc);
/*
* Stop anything previously setup. This is safe whether this is
* the first time through or not.
*/
malo_stop_locked(ifp, 0);
/*
* Push state to the firmware.
*/
if (!malo_hal_reset(sc)) {
if_printf(ifp, "%s: unable to reset hardware\n", __func__);
return;
}
/*
* Setup recv (once); transmit is already good to go.
*/
error = malo_startrecv(sc);
if (error != 0) {
if_printf(ifp, "%s: unable to start recv logic, error %d\n",
__func__, error);
return;
}
/*
* Enable interrupts.
*/
sc->malo_imask = MALO_A2HRIC_BIT_RX_RDY
| MALO_A2HRIC_BIT_TX_DONE
| MALO_A2HRIC_BIT_OPC_DONE
| MALO_A2HRIC_BIT_MAC_EVENT
| MALO_A2HRIC_BIT_RX_PROBLEM
| MALO_A2HRIC_BIT_ICV_ERROR
| MALO_A2HRIC_BIT_RADAR_DETECT
| MALO_A2HRIC_BIT_CHAN_SWITCH;
ifp->if_drv_flags |= IFF_DRV_RUNNING;
malo_hal_intrset(mh, sc->malo_imask);
callout_reset(&sc->malo_watchdog_timer, hz, malo_watchdog, sc);
}
static void
malo_init(void *arg)
{
struct malo_softc *sc = (struct malo_softc *) arg;
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
__func__, ifp->if_flags);
MALO_LOCK(sc);
malo_init_locked(sc);
MALO_UNLOCK(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ieee80211_start_all(ic); /* start all vap's */
}
/*
* Set the multicast filter contents into the hardware.
*/
static void
malo_setmcastfilter(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ifmultiaddr *ifma;
uint8_t macs[IEEE80211_ADDR_LEN * MALO_HAL_MCAST_MAX];
uint8_t *mp;
int nmc;
mp = macs;
nmc = 0;
if (ic->ic_opmode == IEEE80211_M_MONITOR ||
(ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)))
goto all;
if_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
if (nmc == MALO_HAL_MCAST_MAX) {
ifp->if_flags |= IFF_ALLMULTI;
if_maddr_runlock(ifp);
goto all;
}
IEEE80211_ADDR_COPY(mp,
LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
mp += IEEE80211_ADDR_LEN, nmc++;
}
if_maddr_runlock(ifp);
malo_hal_setmcast(sc->malo_mh, nmc, macs);
all:
/*
* XXX we don't know how to set the f/w for supporting
* IFF_ALLMULTI | IFF_PROMISC cases
*/
return;
}
static int
malo_mode_init(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct malo_hal *mh = sc->malo_mh;
/*
* NB: Ignore promisc in hostap mode; it's set by the
* bridge. This is wrong but we have no way to
* identify internal requests (from the bridge)
* versus external requests such as for tcpdump.
*/
malo_hal_setpromisc(mh, (ifp->if_flags & IFF_PROMISC) &&
ic->ic_opmode != IEEE80211_M_HOSTAP);
malo_setmcastfilter(sc);
return ENXIO;
}
static void
malo_tx_draintxq(struct malo_softc *sc, struct malo_txq *txq)
{
struct ieee80211_node *ni;
struct malo_txbuf *bf;
u_int ix;
/*
* NB: this assumes output has been stopped and
* we do not need to block malo_tx_tasklet
*/
for (ix = 0;; ix++) {
MALO_TXQ_LOCK(txq);
bf = STAILQ_FIRST(&txq->active);
if (bf == NULL) {
MALO_TXQ_UNLOCK(txq);
break;
}
STAILQ_REMOVE_HEAD(&txq->active, bf_list);
MALO_TXQ_UNLOCK(txq);
#ifdef MALO_DEBUG
if (sc->malo_debug & MALO_DEBUG_RESET) {
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
const struct malo_txrec *tr =
mtod(bf->bf_m, const struct malo_txrec *);
malo_printtxbuf(bf, txq->qnum, ix);
ieee80211_dump_pkt(ic, (const uint8_t *)&tr->wh,
bf->bf_m->m_len - sizeof(tr->fwlen), 0, -1);
}
#endif /* MALO_DEBUG */
bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
ni = bf->bf_node;
bf->bf_node = NULL;
if (ni != NULL) {
/*
* Reclaim node reference.
*/
ieee80211_free_node(ni);
}
m_freem(bf->bf_m);
bf->bf_m = NULL;
MALO_TXQ_LOCK(txq);
STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
txq->nfree++;
MALO_TXQ_UNLOCK(txq);
}
}
static void
malo_stop_locked(struct ifnet *ifp, int disable)
{
struct malo_softc *sc = ifp->if_softc;
struct malo_hal *mh = sc->malo_mh;
int i;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n",
__func__, sc->malo_invalid, ifp->if_flags);
MALO_LOCK_ASSERT(sc);
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
return;
/*
* Shutdown the hardware and driver:
* disable interrupts
* turn off the radio
* drain and release tx queues
*
* Note that some of this work is not possible if the hardware
* is gone (invalid).
*/
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
callout_stop(&sc->malo_watchdog_timer);
sc->malo_timer = 0;
/* diable interrupt. */
malo_hal_intrset(mh, 0);
/* turn off the radio. */
malo_hal_setradio(mh, 0, MHP_AUTO_PREAMBLE);
/* drain and release tx queues. */
for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
malo_tx_draintxq(sc, &sc->malo_txq[i]);
}
static int
malo_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
#define MALO_IS_RUNNING(ifp) \
((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING))
struct malo_softc *sc = ifp->if_softc;
struct ieee80211com *ic = ifp->if_l2com;
struct ifreq *ifr = (struct ifreq *) data;
int error = 0, startall = 0;
MALO_LOCK(sc);
switch (cmd) {
case SIOCSIFFLAGS:
if (MALO_IS_RUNNING(ifp)) {
/*
* To avoid rescanning another access point,
* do not call malo_init() here. Instead,
* only reflect promisc mode settings.
*/
malo_mode_init(sc);
} else if (ifp->if_flags & IFF_UP) {
/*
* Beware of being called during attach/detach
* to reset promiscuous mode. In that case we
* will still be marked UP but not RUNNING.
* However trying to re-init the interface
* is the wrong thing to do as we've already
* torn down much of our state. There's
* probably a better way to deal with this.
*/
if (!sc->malo_invalid) {
malo_init_locked(sc);
startall = 1;
}
} else
malo_stop_locked(ifp, 1);
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
MALO_UNLOCK(sc);
if (startall)
ieee80211_start_all(ic);
return error;
#undef MALO_IS_RUNNING
}
/*
* Callback from the 802.11 layer to update the slot time
* based on the current setting. We use it to notify the
* firmware of ERP changes and the f/w takes care of things
* like slot time and preamble.
*/
static void
malo_updateslot(struct ifnet *ifp)
{
struct malo_softc *sc = ifp->if_softc;
struct ieee80211com *ic = ifp->if_l2com;
struct malo_hal *mh = sc->malo_mh;
int error;
/* NB: can be called early; suppress needless cmds */
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
return;
DPRINTF(sc, MALO_DEBUG_RESET,
"%s: chan %u MHz/flags 0x%x %s slot, (ic_flags 0x%x)\n",
__func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags,
ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", ic->ic_flags);
if (ic->ic_flags & IEEE80211_F_SHSLOT)
error = malo_hal_set_slot(mh, 1);
else
error = malo_hal_set_slot(mh, 0);
if (error != 0)
device_printf(sc->malo_dev, "setting %s slot failed\n",
ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long");
}
static int
malo_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct ieee80211com *ic = vap->iv_ic;
struct malo_softc *sc = ic->ic_ifp->if_softc;
struct malo_hal *mh = sc->malo_mh;
int error;
DPRINTF(sc, MALO_DEBUG_STATE, "%s: %s -> %s\n", __func__,
ieee80211_state_name[vap->iv_state],
ieee80211_state_name[nstate]);
/*
* Invoke the net80211 layer first so iv_bss is setup.
*/
error = MALO_VAP(vap)->malo_newstate(vap, nstate, arg);
if (error != 0)
return error;
if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
struct ieee80211_node *ni = vap->iv_bss;
enum ieee80211_phymode mode = ieee80211_chan2mode(ni->ni_chan);
const struct ieee80211_txparam *tp = &vap->iv_txparms[mode];
DPRINTF(sc, MALO_DEBUG_STATE,
"%s: %s(RUN): iv_flags 0x%08x bintvl %d bssid %s "
"capinfo 0x%04x chan %d associd 0x%x mode %d rate %d\n",
vap->iv_ifp->if_xname, __func__, vap->iv_flags,
ni->ni_intval, ether_sprintf(ni->ni_bssid), ni->ni_capinfo,
ieee80211_chan2ieee(ic, ic->ic_curchan),
ni->ni_associd, mode, tp->ucastrate);
malo_hal_setradio(mh, 1,
(ic->ic_flags & IEEE80211_F_SHPREAMBLE) ?
MHP_SHORT_PREAMBLE : MHP_LONG_PREAMBLE);
malo_hal_setassocid(sc->malo_mh, ni->ni_bssid, ni->ni_associd);
malo_hal_set_rate(mh, mode,
tp->ucastrate == IEEE80211_FIXED_RATE_NONE ?
0 : malo_fix2rate(tp->ucastrate));
}
return 0;
}
static int
malo_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
const struct ieee80211_bpf_params *params)
{
struct ieee80211com *ic = ni->ni_ic;
struct ifnet *ifp = ic->ic_ifp;
struct malo_softc *sc = ifp->if_softc;
struct malo_txbuf *bf;
struct malo_txq *txq;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid) {
ieee80211_free_node(ni);
m_freem(m);
return ENETDOWN;
}
/*
* Grab a TX buffer and associated resources. Note that we depend
* on the classification by the 802.11 layer to get to the right h/w
* queue. Management frames must ALWAYS go on queue 1 but we
* cannot just force that here because we may receive non-mgt frames.
*/
txq = &sc->malo_txq[0];
bf = malo_getbuf(sc, txq);
if (bf == NULL) {
/* XXX blocks other traffic */
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
ieee80211_free_node(ni);
m_freem(m);
return ENOBUFS;
}
/*
* Pass the frame to the h/w for transmission.
*/
if (malo_tx_start(sc, ni, bf, m) != 0) {
ifp->if_oerrors++;
bf->bf_m = NULL;
bf->bf_node = NULL;
MALO_TXQ_LOCK(txq);
STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
txq->nfree++;
MALO_TXQ_UNLOCK(txq);
ieee80211_free_node(ni);
return EIO; /* XXX */
}
/*
* NB: We don't need to lock against tx done because this just
* prods the firmware to check the transmit descriptors. The firmware
* will also start fetching descriptors by itself if it notices
* new ones are present when it goes to deliver a tx done interrupt
* to the host. So if we race with tx done processing it's ok.
* Delivering the kick here rather than in malo_tx_start is
* an optimization to avoid poking the firmware for each packet.
*
* NB: the queue id isn't used so 0 is ok.
*/
malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
return 0;
}
static void
malo_sysctlattach(struct malo_softc *sc)
{
#ifdef MALO_DEBUG
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->malo_dev);
struct sysctl_oid *tree = device_get_sysctl_tree(sc->malo_dev);
sc->malo_debug = malo_debug;
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"debug", CTLFLAG_RW, &sc->malo_debug, 0,
"control debugging printfs");
#endif
}
static void
malo_announce(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
if_printf(ifp, "versions [hw %d fw %d.%d.%d.%d] (regioncode %d)\n",
sc->malo_hwspecs.hwversion,
(sc->malo_hwspecs.fw_releasenum >> 24) & 0xff,
(sc->malo_hwspecs.fw_releasenum >> 16) & 0xff,
(sc->malo_hwspecs.fw_releasenum >> 8) & 0xff,
(sc->malo_hwspecs.fw_releasenum >> 0) & 0xff,
sc->malo_hwspecs.regioncode);
if (bootverbose || malo_rxbuf != MALO_RXBUF)
if_printf(ifp, "using %u rx buffers\n", malo_rxbuf);
if (bootverbose || malo_txbuf != MALO_TXBUF)
if_printf(ifp, "using %u tx buffers\n", malo_txbuf);
}
/*
* Convert net80211 channel to a HAL channel.
*/
static void
malo_mapchan(struct malo_hal_channel *hc, const struct ieee80211_channel *chan)
{
hc->channel = chan->ic_ieee;
*(uint32_t *)&hc->flags = 0;
if (IEEE80211_IS_CHAN_2GHZ(chan))
hc->flags.freqband = MALO_FREQ_BAND_2DOT4GHZ;
}
/*
* Set/change channels. If the channel is really being changed,
* it's done by reseting the chip. To accomplish this we must
* first cleanup any pending DMA, then restart stuff after a la
* malo_init.
*/
static int
malo_chan_set(struct malo_softc *sc, struct ieee80211_channel *chan)
{
struct malo_hal *mh = sc->malo_mh;
struct malo_hal_channel hchan;
DPRINTF(sc, MALO_DEBUG_RESET, "%s: chan %u MHz/flags 0x%x\n",
__func__, chan->ic_freq, chan->ic_flags);
/*
* Convert to a HAL channel description with the flags constrained
* to reflect the current operating mode.
*/
malo_mapchan(&hchan, chan);
malo_hal_intrset(mh, 0); /* disable interrupts */
malo_hal_setchannel(mh, &hchan);
malo_hal_settxpower(mh, &hchan);
/*
* Update internal state.
*/
sc->malo_tx_th.wt_chan_freq = htole16(chan->ic_freq);
sc->malo_rx_th.wr_chan_freq = htole16(chan->ic_freq);
if (IEEE80211_IS_CHAN_ANYG(chan)) {
sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_G);
sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_G);
} else {
sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_B);
sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_B);
}
sc->malo_curchan = hchan;
malo_hal_intrset(mh, sc->malo_imask);
return 0;
}
static void
malo_scan_start(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
struct malo_softc *sc = ifp->if_softc;
DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
}
static void
malo_scan_end(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
struct malo_softc *sc = ifp->if_softc;
DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
}
static void
malo_set_channel(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
struct malo_softc *sc = ifp->if_softc;
(void) malo_chan_set(sc, ic->ic_curchan);
}
static void
malo_rx_proc(void *arg, int npending)
{
#define IEEE80211_DIR_DSTODS(wh) \
((((const struct ieee80211_frame *)wh)->i_fc[1] & \
IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
struct malo_softc *sc = arg;
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct malo_rxbuf *bf;
struct malo_rxdesc *ds;
struct mbuf *m, *mnew;
struct ieee80211_qosframe *wh;
struct ieee80211_qosframe_addr4 *wh4;
struct ieee80211_node *ni;
int off, len, hdrlen, pktlen, rssi, ntodo;
uint8_t *data, status;
uint32_t readptr, writeptr;
DPRINTF(sc, MALO_DEBUG_RX_PROC,
"%s: pending %u rdptr(0x%x) 0x%x wrptr(0x%x) 0x%x\n",
__func__, npending,
sc->malo_hwspecs.rxdesc_read,
malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read),
sc->malo_hwspecs.rxdesc_write,
malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write));
readptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read);
writeptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write);
if (readptr == writeptr)
return;
bf = sc->malo_rxnext;
for (ntodo = malo_rxquota; ntodo > 0 && readptr != writeptr; ntodo--) {
if (bf == NULL) {
bf = STAILQ_FIRST(&sc->malo_rxbuf);
break;
}
ds = bf->bf_desc;
if (bf->bf_m == NULL) {
/*
* If data allocation failed previously there
* will be no buffer; try again to re-populate it.
* Note the firmware will not advance to the next
* descriptor with a dma buffer so we must mimic
* this or we'll get out of sync.
*/
DPRINTF(sc, MALO_DEBUG_ANY,
"%s: rx buf w/o dma memory\n", __func__);
(void)malo_rxbuf_init(sc, bf);
break;
}
MALO_RXDESC_SYNC(sc, ds,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
if (ds->rxcontrol != MALO_RXD_CTRL_DMA_OWN)
break;
readptr = le32toh(ds->physnext);
#ifdef MALO_DEBUG
if (sc->malo_debug & MALO_DEBUG_RECV_DESC)
malo_printrxbuf(bf, 0);
#endif
status = ds->status;
if (status & MALO_RXD_STATUS_DECRYPT_ERR_MASK) {
ifp->if_ierrors++;
goto rx_next;
}
/*
* Sync the data buffer.
*/
len = le16toh(ds->pktlen);
bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
BUS_DMASYNC_POSTREAD);
/*
* The 802.11 header is provided all or in part at the front;
* use it to calculate the true size of the header that we'll
* construct below. We use this to figure out where to copy
* payload prior to constructing the header.
*/
m = bf->bf_m;
data = mtod(m, uint8_t *);
hdrlen = ieee80211_anyhdrsize(data + sizeof(uint16_t));
off = sizeof(uint16_t) + sizeof(struct ieee80211_frame_addr4);
/*
* Calculate RSSI. XXX wrong
*/
rssi = 2 * ((int) ds->snr - ds->nf); /* NB: .5 dBm */
if (rssi > 100)
rssi = 100;
pktlen = hdrlen + (len - off);
/*
* NB: we know our frame is at least as large as
* IEEE80211_MIN_LEN because there is a 4-address frame at
* the front. Hence there's no need to vet the packet length.
* If the frame in fact is too small it should be discarded
* at the net80211 layer.
*/
/* XXX don't need mbuf, just dma buffer */
mnew = malo_getrxmbuf(sc, bf);
if (mnew == NULL) {
ifp->if_ierrors++;
goto rx_next;
}
/*
* Attach the dma buffer to the mbuf; malo_rxbuf_init will
* re-setup the rx descriptor using the replacement dma
* buffer we just installed above.
*/
bf->bf_m = mnew;
m->m_data += off - hdrlen;
m->m_pkthdr.len = m->m_len = pktlen;
m->m_pkthdr.rcvif = ifp;
/*
* Piece 802.11 header together.
*/
wh = mtod(m, struct ieee80211_qosframe *);
/* NB: don't need to do this sometimes but ... */
/* XXX special case so we can memcpy after m_devget? */
ovbcopy(data + sizeof(uint16_t), wh, hdrlen);
if (IEEE80211_QOS_HAS_SEQ(wh)) {
if (IEEE80211_DIR_DSTODS(wh)) {
wh4 = mtod(m,
struct ieee80211_qosframe_addr4*);
*(uint16_t *)wh4->i_qos = ds->qosctrl;
} else {
*(uint16_t *)wh->i_qos = ds->qosctrl;
}
}
if (ieee80211_radiotap_active(ic)) {
sc->malo_rx_th.wr_flags = 0;
sc->malo_rx_th.wr_rate = ds->rate;
sc->malo_rx_th.wr_antsignal = rssi;
sc->malo_rx_th.wr_antnoise = ds->nf;
}
#ifdef MALO_DEBUG
if (IFF_DUMPPKTS_RECV(sc, wh)) {
ieee80211_dump_pkt(ic, mtod(m, caddr_t),
len, ds->rate, rssi);
}
#endif
ifp->if_ipackets++;
/* dispatch */
ni = ieee80211_find_rxnode(ic,
(struct ieee80211_frame_min *)wh);
if (ni != NULL) {
(void) ieee80211_input(ni, m, rssi, ds->nf);
ieee80211_free_node(ni);
} else
(void) ieee80211_input_all(ic, m, rssi, ds->nf);
rx_next:
/* NB: ignore ENOMEM so we process more descriptors */
(void) malo_rxbuf_init(sc, bf);
bf = STAILQ_NEXT(bf, bf_list);
}
malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read, readptr);
sc->malo_rxnext = bf;
if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0 &&
!IFQ_IS_EMPTY(&ifp->if_snd))
malo_start(ifp);
#undef IEEE80211_DIR_DSTODS
}
static void
malo_stop(struct ifnet *ifp, int disable)
{
struct malo_softc *sc = ifp->if_softc;
MALO_LOCK(sc);
malo_stop_locked(ifp, disable);
MALO_UNLOCK(sc);
}
/*
* Reclaim all tx queue resources.
*/
static void
malo_tx_cleanup(struct malo_softc *sc)
{
int i;
for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
malo_tx_cleanupq(sc, &sc->malo_txq[i]);
}
int
malo_detach(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
struct ieee80211com *ic = ifp->if_l2com;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
__func__, ifp->if_flags);
malo_stop(ifp, 1);
if (sc->malo_tq != NULL) {
taskqueue_drain(sc->malo_tq, &sc->malo_rxtask);
taskqueue_drain(sc->malo_tq, &sc->malo_txtask);
taskqueue_free(sc->malo_tq);
sc->malo_tq = NULL;
}
/*
* NB: the order of these is important:
* o call the 802.11 layer before detaching the hal to
* insure callbacks into the driver to delete global
* key cache entries can be handled
* o reclaim the tx queue data structures after calling
* the 802.11 layer as we'll get called back to reclaim
* node state and potentially want to use them
* o to cleanup the tx queues the hal is called, so detach
* it last
* Other than that, it's straightforward...
*/
ieee80211_ifdetach(ic);
callout_drain(&sc->malo_watchdog_timer);
malo_dma_cleanup(sc);
malo_tx_cleanup(sc);
malo_hal_detach(sc->malo_mh);
if_free(ifp);
MALO_LOCK_DESTROY(sc);
return 0;
}
void
malo_shutdown(struct malo_softc *sc)
{
malo_stop(sc->malo_ifp, 1);
}
void
malo_suspend(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
__func__, ifp->if_flags);
malo_stop(ifp, 1);
}
void
malo_resume(struct malo_softc *sc)
{
struct ifnet *ifp = sc->malo_ifp;
DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
__func__, ifp->if_flags);
if (ifp->if_flags & IFF_UP)
malo_init(sc);
}
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