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freebsd-dev/sys/dev/malo/if_malo.c

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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_var.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_RWTUN, &malo_txcoalesce,
0, "tx buffers to send at once");
static int malo_rxbuf = MALO_RXBUF; /* # rx buffers to allocate */
SYSCTL_INT(_hw_malo, OID_AUTO, rxbuf, CTLFLAG_RWTUN, &malo_rxbuf,
0, "rx buffers allocated");
static int malo_rxquota = MALO_RXBUF; /* # max buffers to process */
SYSCTL_INT(_hw_malo, OID_AUTO, rxquota, CTLFLAG_RWTUN, &malo_rxquota,
0, "max rx buffers to process per interrupt");
static int malo_txbuf = MALO_TXBUF; /* # tx buffers to allocate */
SYSCTL_INT(_hw_malo, OID_AUTO, txbuf, CTLFLAG_RWTUN, &malo_txbuf,
0, "tx buffers allocated");
#ifdef MALO_DEBUG
static int malo_debug = 0;
SYSCTL_INT(_hw_malo, OID_AUTO, debug, CTLFLAG_RWTUN, &malo_debug,
0, "control debugging printfs");
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
static MALLOC_DEFINE(M_MALODEV, "malodev", "malo driver dma buffers");
static struct ieee80211vap *malo_vap_create(struct ieee80211com *,
const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
const uint8_t [IEEE80211_ADDR_LEN],
const uint8_t [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,
enum ieee80211_opmode 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_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_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_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_NOWAIT);
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_PROTECTED;
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_NOWAIT, 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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