diff options
Diffstat (limited to 'sys/dev/pci/if_wpi.c')
| -rw-r--r-- | sys/dev/pci/if_wpi.c | 328 |
1 files changed, 270 insertions, 58 deletions
diff --git a/sys/dev/pci/if_wpi.c b/sys/dev/pci/if_wpi.c index c28c8646115..f34ed132a95 100644 --- a/sys/dev/pci/if_wpi.c +++ b/sys/dev/pci/if_wpi.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_wpi.c,v 1.12 2006/05/20 15:46:55 damien Exp $ */ +/* $OpenBSD: if_wpi.c,v 1.13 2006/05/25 09:26:58 damien Exp $ */ /*- * Copyright (c) 2006 @@ -81,8 +81,8 @@ static const struct ieee80211_rateset wpi_rateset_11b = static const struct ieee80211_rateset wpi_rateset_11g = { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; -static const uint8_t wpi_ridx_to_rate[] = { - 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, /* OFDM */ +static const uint8_t wpi_ridx_to_plcp[] = { + 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, /* OFDM R1-R4 */ 10, 20, 55, 110 /* CCK */ }; @@ -102,6 +102,9 @@ int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, int, int); void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); +struct ieee80211_node *wpi_node_alloc(struct ieee80211com *); +void wpi_node_copy(struct ieee80211com *, struct ieee80211_node *, + const struct ieee80211_node *); int wpi_media_change(struct ifnet *); int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int); void wpi_mem_lock(struct wpi_softc *); @@ -122,6 +125,7 @@ void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); void wpi_notif_intr(struct wpi_softc *); int wpi_intr(void *); void wpi_read_eeprom(struct wpi_softc *); +uint8_t wpi_plcp_signal(int); int wpi_tx_data(struct wpi_softc *, struct mbuf *, struct ieee80211_node *, int); void wpi_start(struct ifnet *); @@ -142,6 +146,12 @@ void wpi_hw_config(struct wpi_softc *); int wpi_init(struct ifnet *); void wpi_stop(struct ifnet *, int); +/* rate control algorithm: should be moved to net80211 */ +void wpi_amrr_init(struct wpi_amrr *); +void wpi_amrr_init(struct wpi_amrr *); +void wpi_amrr_timeout(void *); +void wpi_amrr_ratectl(void *, struct ieee80211_node *); + #define WPI_DEBUG #ifdef WPI_DEBUG @@ -218,7 +228,6 @@ wpi_attach(struct device *parent, struct device *self, void *aux) } printf(": %s", intrstr); - /* * Put adapter into a known state. */ @@ -321,11 +330,16 @@ wpi_attach(struct device *parent, struct device *self, void *aux) if_attach(ifp); ieee80211_ifattach(ifp); + ic->ic_node_alloc = wpi_node_alloc; + ic->ic_node_copy = wpi_node_copy; + /* override state transition machine */ sc->sc_newstate = ic->ic_newstate; ic->ic_newstate = wpi_newstate; ieee80211_media_init(ifp, wpi_media_change, ieee80211_media_status); + timeout_set(&sc->amrr_ch, wpi_amrr_timeout, sc); + sc->powerhook = powerhook_establish(wpi_power, sc); #if NBPFILTER > 0 @@ -385,6 +399,7 @@ wpi_power(int why, void *arg) struct wpi_softc *sc = arg; struct ifnet *ifp; pcireg_t data; + int s; if (why != PWR_RESUME) return; @@ -394,12 +409,14 @@ wpi_power(int why, void *arg) data &= ~0x0000ff00; pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); + s = splnet(); ifp = &sc->sc_ic.ic_if; if (ifp->if_flags & IFF_UP) { ifp->if_init(ifp); if (ifp->if_flags & IFF_RUNNING) ifp->if_start(ifp); } + splx(s); } int @@ -719,6 +736,27 @@ wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) } } +struct ieee80211_node * +wpi_node_alloc(struct ieee80211com *ic) +{ + struct wpi_amrr *amrr; + + amrr = malloc(sizeof (struct wpi_amrr), M_DEVBUF, M_NOWAIT); + if (amrr != NULL) { + bzero(amrr, sizeof (struct wpi_amrr)); + wpi_amrr_init(amrr); + } + return (struct ieee80211_node *)amrr; +} + +void +wpi_node_copy(struct ieee80211com *ic, struct ieee80211_node *dst, + const struct ieee80211_node *src) +{ + *dst = *src; + wpi_amrr_init((struct wpi_amrr *)dst); +} + int wpi_media_change(struct ifnet *ifp) { @@ -741,6 +779,8 @@ wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) struct wpi_softc *sc = ifp->if_softc; int error; + timeout_del(&sc->amrr_ch); + switch (nstate) { case IEEE80211_S_SCAN: /* make the link LED blink while we're scanning */ @@ -773,8 +813,17 @@ wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) /* update adapter's configuration */ sc->config.state = htole16(WPI_CONFIG_ASSOCIATED); + /* short preamble/slot time are negotiated when associating */ + sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | + WPI_CONFIG_SHSLOT); + if (ic->ic_flags & IEEE80211_F_SHSLOT) + sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); + if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) + sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); sc->config.filter |= htole32(WPI_FILTER_BSSID); + DPRINTF(("config chan %d flags %x\n", sc->config.chan, + sc->config.flags)); error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct wpi_config), 1); if (error != 0) { @@ -783,6 +832,9 @@ wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) return error; } + /* start automatic rate control timer */ + timeout_add(&sc->amrr_ch, hz / 2); + /* link LED always on while associated */ wpi_set_led(sc, WPI_LED_LINK, 0, 1); break; @@ -801,7 +853,7 @@ wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) void wpi_mem_lock(struct wpi_softc *sc) { - uint32_t tmp; + uint32_t tmp; int ntries; tmp = WPI_READ(sc, WPI_GPIO_CTL); @@ -910,7 +962,7 @@ wpi_load_microcode(struct wpi_softc *sc, const char *ucode, int size) /* * The firmware text and data segments are transferred to the NIC using DMA. - * The driver just copies the firmware into DMA'able memory and tells the NIC + * The driver just copies the firmware into DMA-safe memory and tells the NIC * where to find it. Once the NIC has copied the firmware into its internal * memory, we can free our local copy in the driver. */ @@ -925,7 +977,7 @@ wpi_load_firmware(struct wpi_softc *sc, uint32_t target, const char *fw, int i, ntries, nsegs, error; /* - * Allocate DMA'able memory to store the firmware. + * Allocate DMA-safe memory to store the firmware. */ error = bus_dmamap_create(sc->sc_dmat, size, WPI_MAX_SCATTER, WPI_MAX_SEG_LEN, 0, BUS_DMA_NOWAIT, &map); @@ -959,7 +1011,7 @@ wpi_load_firmware(struct wpi_softc *sc, uint32_t target, const char *fw, goto fail4; } - /* copy firmware image to DMA'able memory */ + /* copy firmware image to DMA-safe memory */ bcopy(fw, virtaddr, size); /* make sure the adapter will get up-to-date values */ @@ -968,8 +1020,8 @@ wpi_load_firmware(struct wpi_softc *sc, uint32_t target, const char *fw, bzero(&desc, sizeof desc); desc.flags = htole32(WPI_PAD32(size) << 28 | map->dm_nsegs << 24); for (i = 0; i < map->dm_nsegs; i++) { - desc.segs[i].physaddr = htole32(map->dm_segs[i].ds_addr); - desc.segs[i].len = htole32(map->dm_segs[i].ds_len); + desc.segs[i].addr = htole32(map->dm_segs[i].ds_addr); + desc.segs[i].len = htole32(map->dm_segs[i].ds_len); } wpi_mem_lock(sc); @@ -1097,7 +1149,7 @@ wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, tap->wr_chan_flags = htole16(ic->ic_channels[head->chan].ic_flags); tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); - tap->wr_dbm_antnoise = (int8_t)stat->noise; + tap->wr_dbm_antnoise = (int8_t)letoh16(stat->noise); tap->wr_tsft = tail->tstamp; tap->wr_antenna = (letoh16(head->flags) >> 4) & 0xf; switch (head->rate) { @@ -1114,7 +1166,7 @@ wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, case 0x9: tap->wr_rate = 48; break; case 0xb: tap->wr_rate = 72; break; case 0x1: tap->wr_rate = 96; break; - case 0x3: tap->wr_rate = 109; break; + case 0x3: tap->wr_rate = 108; break; /* unknown rate: should not happen */ default: tap->wr_rate = 0; } @@ -1150,12 +1202,20 @@ wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; struct wpi_tx_data *txdata = &ring->data[desc->idx]; struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); + struct wpi_amrr *amrr = (struct wpi_amrr *)txdata->ni; DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, stat->nkill, stat->rate, letoh32(stat->duration), letoh32(stat->status))); + /* update rate control statistics for the node */ + amrr->txcnt++; + if (stat->ntries > 0) { + DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); + amrr->retrycnt++; + } + bus_dmamap_unload(sc->sc_dmat, data->map); m_freem(txdata->m); @@ -1192,7 +1252,7 @@ wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) data->m = NULL; } - wakeup(&sc->cmdq.cmd[desc->idx]); + wakeup(&ring->cmd[desc->idx]); } void @@ -1281,7 +1341,7 @@ wpi_notif_intr(struct wpi_softc *sc) /* tell the firmware what we have processed */ hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; - WPI_WRITE(sc, WPI_RX_WIDX, hw & ~0x7); + WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); } int @@ -1321,6 +1381,32 @@ wpi_intr(void *arg) return 1; } +uint8_t +wpi_plcp_signal(int rate) +{ + switch (rate) { + /* CCK rates (returned values are device-dependent) */ + case 2: return 10; + case 4: return 20; + case 11: return 55; + case 22: return 110; + + /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ + /* R1-R4, (u)ral is R4-R1 */ + case 12: return 0xd; + case 18: return 0xf; + case 24: return 0x5; + case 36: return 0x7; + case 48: return 0x9; + case 72: return 0xb; + case 96: return 0x1; + case 108: return 0x3; + + /* unsupported rates (should not get there) */ + default: return 0; + } +} + int wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, int ac) @@ -1334,11 +1420,10 @@ wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, struct wpi_cmd_data *tx; struct ieee80211_frame *wh; struct mbuf *mnew; - int i, error; + int i, rate, error; desc = &ring->desc[ring->cur]; data = &ring->data[ring->cur]; - cmd = &ring->cmd[ring->cur]; wh = mtod(m0, struct ieee80211_frame *); @@ -1351,15 +1436,29 @@ wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, wh = mtod(m0, struct ieee80211_frame *); } + /* pickup a rate */ + if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == + IEEE80211_FC0_TYPE_MGT) { + /* mgmt frames are sent at the lowest available bit-rate */ + rate = ni->ni_rates.rs_rates[0]; + } else { + if (ic->ic_fixed_rate != -1) { + rate = ic->ic_sup_rates[ic->ic_curmode]. + rs_rates[ic->ic_fixed_rate]; + } else + rate = ni->ni_rates.rs_rates[ni->ni_txrate]; + } + rate &= IEEE80211_RATE_VAL; + #if NBPFILTER > 0 if (sc->sc_drvbpf != NULL) { struct mbuf mb; struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; tap->wt_flags = 0; - tap->wt_chan_freq = htole16(ic->ic_ibss_chan->ic_freq); - tap->wt_chan_flags = htole16(ic->ic_ibss_chan->ic_flags); - tap->wt_rate = 2; /* 1Mb/s */ + tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); + tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); + tap->wt_rate = rate; tap->wt_hwqueue = ac; if (wh->i_fc[1] & IEEE80211_FC1_WEP) tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; @@ -1373,6 +1472,7 @@ wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, } #endif + cmd = &ring->cmd[ring->cur]; cmd->code = WPI_CMD_TX_DATA; cmd->flags = 0; cmd->qid = ring->qid; @@ -1384,39 +1484,39 @@ wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) tx->flags |= htole32(WPI_TX_NEED_ACK); else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) - tx->flags |= htole32(WPI_TX_NEED_RTS); + tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); tx->flags |= htole32(WPI_TX_AUTO_SEQ); - /* tell h/w to set timestamp in probe responses */ - if ((wh->i_fc[0] & - (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == - (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) - tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); - /* retrieve destination node's id */ tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST : WPI_ID_BSSID; - if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { + if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == + IEEE80211_FC0_TYPE_MGT) { + /* tell h/w to set timestamp in probe responses */ + if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == + IEEE80211_FC0_SUBTYPE_PROBE_RESP) + tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); + if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_ASSOC_REQ) || ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_REASSOC_REQ)) - tx->duration = 3; + tx->timeout = 3; else - tx->duration = 2; + tx->timeout = 2; } else - tx->duration = 0; + tx->timeout = 0; - tx->rate = 10; /* 1Mb/s */ + tx->rate = wpi_plcp_signal(rate); /* be very persistant at sending frames out */ tx->rts_ntries = 7; tx->data_ntries = 15; - tx->ofdm_mask = sc->config.ofdm_mask; - tx->cck_mask = sc->config.cck_mask; + tx->ofdm_mask = 0xff; + tx->cck_mask = 0xf;; tx->lifetime = htole32(0xffffffff); tx->len = htole16(m0->m_pkthdr.len); @@ -1476,13 +1576,13 @@ wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, /* first scatter/gather segment is used by the tx data command */ desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | (1 + data->map->dm_nsegs) << 24); - desc->segs[0].physaddr = htole32(ring->cmd_dma.paddr + + desc->segs[0].addr = htole32(ring->cmd_dma.paddr + ring->cur * sizeof (struct wpi_tx_cmd)); - desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); + desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); for (i = 1; i <= data->map->dm_nsegs; i++) { - desc->segs[i].physaddr = + desc->segs[i].addr = htole32(data->map->dm_segs[i - 1].ds_addr); - desc->segs[i].len = + desc->segs[i].len = htole32(data->map->dm_segs[i - 1].ds_len); } @@ -1684,7 +1784,7 @@ wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) KASSERT(size <= sizeof cmd->data); desc = &ring->desc[ring->cur]; - cmd = &ring->cmd[ring->cur]; + cmd = &ring->cmd[ring->cur]; cmd->code = code; cmd->flags = 0; @@ -1693,9 +1793,9 @@ wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) bcopy(buf, cmd->data, size); desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); - desc->segs[0].physaddr = htole32(ring->cmd_dma.paddr + + desc->segs[0].addr = htole32(ring->cmd_dma.paddr + ring->cur * sizeof (struct wpi_tx_cmd)); - desc->segs[0].len = htole32(4 + size); + desc->segs[0].len = htole32(4 + size); /* kick cmd ring */ ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; @@ -1716,7 +1816,7 @@ wpi_mrr_setup(struct wpi_softc *sc) /* CCK rates (not used with 802.11a) */ for (i = WPI_CCK1; i <= WPI_CCK11; i++) { mrr.rates[i].flags = 0; - mrr.rates[i].plcp = wpi_ridx_to_rate[i]; + mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; /* fallback to the immediate lower CCK rate (if any) */ mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; /* try one time at this rate before falling back to "next" */ @@ -1726,9 +1826,10 @@ wpi_mrr_setup(struct wpi_softc *sc) /* OFDM rates (not used with 802.11b) */ for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { mrr.rates[i].flags = 0; - mrr.rates[i].plcp = wpi_ridx_to_rate[i]; - /* fallback to the immediate lower OFDM rate (if any) */ - mrr.rates[i].next = (i == WPI_OFDM6) ? WPI_OFDM6 : i - 1; + mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; + /* fallback to the immediate lower rate (if any) */ + /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ + mrr.rates[i].next = (i == WPI_OFDM6) ? WPI_CCK2 : i - 1; /* try one time at this rate before falling back to "next" */ mrr.rates[i].ntries = 1; } @@ -1817,9 +1918,11 @@ wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) bcn = (struct wpi_cmd_beacon *)cmd->data; bzero(bcn, sizeof (struct wpi_cmd_beacon)); bcn->id = WPI_ID_BROADCAST; + bcn->ofdm_mask = 0xff; + bcn->cck_mask = 0xf; bcn->lifetime = htole32(0xffffffff); bcn->len = htole16(m0->m_pkthdr.len); - bcn->rate = 10; /* 1Mb/s */ + bcn->rate = wpi_plcp_signal(2); bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); /* save and trim IEEE802.11 header */ @@ -1839,11 +1942,11 @@ wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) /* first scatter/gather segment is used by the beacon command */ desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); - desc->segs[0].physaddr = htole32(ring->cmd_dma.paddr + + desc->segs[0].addr = htole32(ring->cmd_dma.paddr + ring->cur * sizeof (struct wpi_tx_cmd)); - desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); - desc->segs[1].physaddr = htole32(data->map->dm_segs[0].ds_addr); - desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); + desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); + desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr); + desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); /* kick cmd ring */ ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; @@ -1891,7 +1994,7 @@ wpi_auth(struct wpi_softc *sc) bzero(&node, sizeof node); IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); node.id = WPI_ID_BSSID; - node.rate = 10; /* 1Mb/s */ + node.rate = wpi_plcp_signal(2); error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); if (error != 0) { printf("%s: could not add BSS node\n", sc->sc_dev.dv_xname); @@ -1961,7 +2064,7 @@ wpi_scan(struct wpi_softc *sc) hdr->quiet = htole16(5); hdr->threshold = htole16(1); hdr->filter = htole32(5); /* XXX */ - hdr->rate = 10; /* 1Mb/s */ + hdr->rate = wpi_plcp_signal(2); hdr->id = WPI_ID_BROADCAST; hdr->mask = htole32(0xffffffff); hdr->esslen = ni->ni_esslen; @@ -1969,8 +2072,7 @@ wpi_scan(struct wpi_softc *sc) /* * Build a probe request frame. Most of the following code is a - * copy & paste of what is done in net80211. Unfortunately, the - * functions to add IEs are static and thus can't be reused here. + * copy & paste of what is done in net80211. */ wh = (struct ieee80211_frame *)(hdr + 1); wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | @@ -2024,8 +2126,8 @@ wpi_scan(struct wpi_softc *sc) } desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); - desc->segs[0].physaddr = htole32(data->map->dm_segs[0].ds_addr); - desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); + desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); + desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); /* kick cmd ring */ ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; @@ -2038,6 +2140,7 @@ int wpi_config(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; + struct ifnet *ifp = &ic->ic_if; struct wpi_txpower txpower; struct wpi_power power; struct wpi_bluetooth bluetooth; @@ -2080,6 +2183,7 @@ wpi_config(struct wpi_softc *sc) /* configure adapter */ bzero(&sc->config, sizeof (struct wpi_config)); + IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl)); IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_ibss_chan); sc->config.flags = htole32(WPI_CONFIG_TSF | WPI_CONFIG_AUTO | @@ -2116,7 +2220,7 @@ wpi_config(struct wpi_softc *sc) bzero(&node, sizeof node); IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr); node.id = WPI_ID_BROADCAST; - node.rate = 10; /* 1Mb/s */ + node.rate = wpi_plcp_signal(2); error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); if (error != 0) { printf("%s: could not add broadcast node\n", @@ -2261,7 +2365,7 @@ wpi_init(struct ifnet *ifp) uint32_t tmp; int qid, ntries, error; - wpi_reset(sc); + (void)wpi_reset(sc); wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); @@ -2270,7 +2374,7 @@ wpi_init(struct ifnet *ifp) wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); wpi_mem_unlock(sc); - wpi_power_up(sc); + (void)wpi_power_up(sc); wpi_hw_config(sc); /* init Rx ring */ @@ -2452,6 +2556,114 @@ wpi_stop(struct ifnet *ifp, int disable) WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); } +/*- + * Naive implementation of the Adaptive Multi Rate Retry algorithm: + * "IEEE 802.11 Rate Adaptation: A Practical Approach" + * Mathieu Lacage, Hossein Manshaei, Thierry Turletti + * INRIA Sophia - Projet Planete + * http://www-sop.inria.fr/rapports/sophia/RR-5208.html + */ +#define is_success(amrr) \ + ((amrr)->retrycnt < (amrr)->txcnt / 10) +#define is_failure(amrr) \ + ((amrr)->retrycnt > (amrr)->txcnt / 3) +#define is_enough(amrr) \ + ((amrr)->txcnt > 10) +#define is_min_rate(ni) \ + ((ni)->ni_txrate == 0) +#define is_max_rate(ni) \ + ((ni)->ni_txrate == (ni)->ni_rates.rs_nrates - 1) +#define increase_rate(ni) \ + ((ni)->ni_txrate++) +#define decrease_rate(ni) \ + ((ni)->ni_txrate--) +#define reset_cnt(amrr) \ + do { (amrr)->txcnt = (amrr)->retrycnt = 0; } while (0) + +#define WPI_AMRR_MIN_SUCCESS_THRESHOLD 1 +#define WPI_AMRR_MAX_SUCCESS_THRESHOLD 15 + +void +wpi_amrr_init(struct wpi_amrr *amrr) +{ + struct ieee80211_node *ni = &amrr->ni; + int i; + + amrr->success = 0; + amrr->recovery = 0; + amrr->txcnt = amrr->retrycnt = 0; + amrr->success_threshold = WPI_AMRR_MIN_SUCCESS_THRESHOLD; + + /* set rate to some reasonable initial value */ + ni = &amrr->ni; + for (i = ni->ni_rates.rs_nrates - 1; + i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; + i--); + + ni->ni_txrate = i; +} + +void +wpi_amrr_timeout(void *arg) +{ + struct wpi_softc *sc = arg; + struct ieee80211com *ic = &sc->sc_ic; + + if (ic->ic_opmode == IEEE80211_M_STA) + wpi_amrr_ratectl(NULL, ic->ic_bss); + else + ieee80211_iterate_nodes(ic, wpi_amrr_ratectl, NULL); + + timeout_add(&sc->amrr_ch, hz / 2); +} + +/* ARGSUSED */ +void +wpi_amrr_ratectl(void *arg, struct ieee80211_node *ni) +{ + struct wpi_amrr *amrr = (struct wpi_amrr *)ni; + int need_change = 0; + + if (is_success(amrr) && is_enough(amrr)) { + amrr->success++; + if (amrr->success >= amrr->success_threshold && + !is_max_rate(ni)) { + amrr->recovery = 1; + amrr->success = 0; + increase_rate(ni); + DPRINTFN(2, ("AMRR increasing rate %d (txcnt=%d " + "retrycnt=%d)\n", ni->ni_txrate, amrr->txcnt, + amrr->retrycnt)); + need_change = 1; + } else { + amrr->recovery = 0; + } + } else if (is_failure(amrr)) { + amrr->success = 0; + if (!is_min_rate(ni)) { + if (amrr->recovery) { + amrr->success_threshold *= 2; + if (amrr->success_threshold > + WPI_AMRR_MAX_SUCCESS_THRESHOLD) + amrr->success_threshold = + WPI_AMRR_MAX_SUCCESS_THRESHOLD; + } else { + amrr->success_threshold = + WPI_AMRR_MIN_SUCCESS_THRESHOLD; + } + decrease_rate(ni); + DPRINTFN(2, ("AMRR decreasing rate %d (txcnt=%d " + "retrycnt=%d)\n", ni->ni_txrate, amrr->txcnt, + amrr->retrycnt)); + need_change = 1; + } + amrr->recovery = 0; /* paper is incorrect */ + } + + if (is_enough(amrr) || need_change) + reset_cnt(amrr); +} + struct cfdriver wpi_cd = { NULL, "wpi", DV_IFNET }; |