/* * Copyright (c) 2010 Broadcom Corporation * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include "rate.h" #include "scb.h" #include "phy/phy_hal.h" #include "channel.h" #include "bmac.h" #include "antsel.h" #include "stf.h" #include "ampdu.h" #include "alloc.h" #include "mac80211_if.h" #include "main.h" /* * WPA(2) definitions */ #define RSN_CAP_4_REPLAY_CNTRS 2 #define RSN_CAP_16_REPLAY_CNTRS 3 #define WPA_CAP_4_REPLAY_CNTRS RSN_CAP_4_REPLAY_CNTRS #define WPA_CAP_16_REPLAY_CNTRS RSN_CAP_16_REPLAY_CNTRS /* * Indication for txflowcontrol that all priority bits in * TXQ_STOP_FOR_PRIOFC_MASK are to be considered. */ #define ALLPRIO -1 /* * 32 SSID chars, max of 4 chars for each SSID char "\xFF", plus NULL. */ #define SSID_FMT_BUF_LEN ((4 * IEEE80211_MAX_SSID_LEN) + 1) #define TIMER_INTERVAL_WATCHDOG 1000 /* watchdog timer, in unit of ms */ #define TIMER_INTERVAL_RADIOCHK 800 /* radio monitor timer, in unit of ms */ /* Max MPC timeout, in unit of watchdog */ #ifndef BRCMS_MPC_MAX_DELAYCNT #define BRCMS_MPC_MAX_DELAYCNT 10 #endif /* Min MPC timeout, in unit of watchdog */ #define BRCMS_MPC_MIN_DELAYCNT 1 #define BRCMS_MPC_THRESHOLD 3 /* MPC count threshold level */ #define BEACON_INTERVAL_DEFAULT 100 /* beacon interval, in unit of 1024TU */ #define DTIM_INTERVAL_DEFAULT 3 /* DTIM interval, in unit of beacon interval */ /* Scale down delays to accommodate QT slow speed */ #define BEACON_INTERVAL_DEF_QT 20 /* beacon interval, in unit of 1024TU */ #define DTIM_INTERVAL_DEF_QT 1 /* DTIM interval, in unit of beacon interval */ #define TBTT_ALIGN_LEEWAY_US 100 /* min leeway before first TBTT in us */ /* Software feature flag defines used by wlfeatureflag */ #define WL_SWFL_NOHWRADIO 0x0004 #define WL_SWFL_FLOWCONTROL 0x0008 /* Enable backpressure to OS stack */ #define WL_SWFL_WLBSSSORT 0x0010 /* Per-port supports sorting of BSS */ /* n-mode support capability */ /* 2x2 includes both 1x1 & 2x2 devices * reserved #define 2 for future when we want to separate 1x1 & 2x2 and * control it independently */ #define WL_11N_2x2 1 #define WL_11N_3x3 3 #define WL_11N_4x4 4 /* define 11n feature disable flags */ #define WLFEATURE_DISABLE_11N 0x00000001 #define WLFEATURE_DISABLE_11N_STBC_TX 0x00000002 #define WLFEATURE_DISABLE_11N_STBC_RX 0x00000004 #define WLFEATURE_DISABLE_11N_SGI_TX 0x00000008 #define WLFEATURE_DISABLE_11N_SGI_RX 0x00000010 #define WLFEATURE_DISABLE_11N_AMPDU_TX 0x00000020 #define WLFEATURE_DISABLE_11N_AMPDU_RX 0x00000040 #define WLFEATURE_DISABLE_11N_GF 0x00000080 #define EDCF_ACI_MASK 0x60 #define EDCF_ACI_SHIFT 5 #define EDCF_ECWMIN_MASK 0x0f #define EDCF_ECWMAX_SHIFT 4 #define EDCF_AIFSN_MASK 0x0f #define EDCF_AIFSN_MAX 15 #define EDCF_ECWMAX_MASK 0xf0 #define EDCF_AC_BE_TXOP_STA 0x0000 #define EDCF_AC_BK_TXOP_STA 0x0000 #define EDCF_AC_VO_ACI_STA 0x62 #define EDCF_AC_VO_ECW_STA 0x32 #define EDCF_AC_VI_ACI_STA 0x42 #define EDCF_AC_VI_ECW_STA 0x43 #define EDCF_AC_BK_ECW_STA 0xA4 #define EDCF_AC_VI_TXOP_STA 0x005e #define EDCF_AC_VO_TXOP_STA 0x002f #define EDCF_AC_BE_ACI_STA 0x03 #define EDCF_AC_BE_ECW_STA 0xA4 #define EDCF_AC_BK_ACI_STA 0x27 #define EDCF_AC_VO_TXOP_AP 0x002f #define EDCF_TXOP2USEC(txop) ((txop) << 5) #define EDCF_ECW2CW(exp) ((1 << (exp)) - 1) #define APHY_SYMBOL_TIME 4 #define APHY_PREAMBLE_TIME 16 #define APHY_SIGNAL_TIME 4 #define APHY_SIFS_TIME 16 #define APHY_SERVICE_NBITS 16 #define APHY_TAIL_NBITS 6 #define BPHY_SIFS_TIME 10 #define BPHY_PLCP_SHORT_TIME 96 #define PREN_PREAMBLE 24 #define PREN_MM_EXT 12 #define PREN_PREAMBLE_EXT 4 #define DOT11_MAC_HDR_LEN 24 #define DOT11_ACK_LEN 10 #define DOT11_BA_LEN 4 #define DOT11_OFDM_SIGNAL_EXTENSION 6 #define DOT11_MIN_FRAG_LEN 256 #define DOT11_RTS_LEN 16 #define DOT11_CTS_LEN 10 #define DOT11_BA_BITMAP_LEN 128 #define DOT11_MIN_BEACON_PERIOD 1 #define DOT11_MAX_BEACON_PERIOD 0xFFFF #define DOT11_MAXNUMFRAGS 16 #define DOT11_MAX_FRAG_LEN 2346 #define BPHY_PLCP_TIME 192 #define RIFS_11N_TIME 2 #define WME_VER 1 #define WME_SUBTYPE_PARAM_IE 1 #define WME_TYPE 2 #define WME_OUI "\x00\x50\xf2" #define AC_BE 0 #define AC_BK 1 #define AC_VI 2 #define AC_VO 3 /* * driver maintains internal 'tick'(wlc->pub->now) which increments in 1s OS timer(soft * watchdog) it is not a wall clock and won't increment when driver is in "down" state * this low resolution driver tick can be used for maintenance tasks such as phy * calibration and scb update */ /* To inform the ucode of the last mcast frame posted so that it can clear moredata bit */ #define BCMCFID(wlc, fid) brcms_b_write_shm((wlc)->hw, M_BCMC_FID, (fid)) #define BRCMS_WAR16165(wlc) (wlc->pub->sih->bustype == PCI_BUS && \ (!AP_ENAB(wlc->pub)) && (wlc->war16165)) /* debug/trace */ uint brcm_msg_level = #if defined(BCMDBG) LOG_ERROR_VAL; #else 0; #endif /* BCMDBG */ /* Find basic rate for a given rate */ #define BRCMS_BASIC_RATE(wlc, rspec) (IS_MCS(rspec) ? \ (wlc)->band->basic_rate[mcs_table[rspec & RSPEC_RATE_MASK].leg_ofdm] : \ (wlc)->band->basic_rate[rspec & RSPEC_RATE_MASK]) #define FRAMETYPE(r, mimoframe) (IS_MCS(r) ? mimoframe : (IS_CCK(r) ? FT_CCK : FT_OFDM)) #define RFDISABLE_DEFAULT 10000000 /* rfdisable delay timer 500 ms, runs of ALP clock */ #define BRCMS_TEMPSENSE_PERIOD 10 /* 10 second timeout */ #define SCAN_IN_PROGRESS(x) 0 #define EPI_VERSION_NUM 0x054b0b00 #ifdef BCMDBG /* pointer to most recently allocated wl/wlc */ static struct brcms_c_info *wlc_info_dbg = (struct brcms_c_info *) (NULL); #endif const u8 prio2fifo[NUMPRIO] = { TX_AC_BE_FIFO, /* 0 BE AC_BE Best Effort */ TX_AC_BK_FIFO, /* 1 BK AC_BK Background */ TX_AC_BK_FIFO, /* 2 -- AC_BK Background */ TX_AC_BE_FIFO, /* 3 EE AC_BE Best Effort */ TX_AC_VI_FIFO, /* 4 CL AC_VI Video */ TX_AC_VI_FIFO, /* 5 VI AC_VI Video */ TX_AC_VO_FIFO, /* 6 VO AC_VO Voice */ TX_AC_VO_FIFO /* 7 NC AC_VO Voice */ }; /* precedences numbers for wlc queues. These are twice as may levels as * 802.1D priorities. * Odd numbers are used for HI priority traffic at same precedence levels * These constants are used ONLY by wlc_prio2prec_map. Do not use them elsewhere. */ #define _BRCMS_PREC_NONE 0 /* None = - */ #define _BRCMS_PREC_BK 2 /* BK - Background */ #define _BRCMS_PREC_BE 4 /* BE - Best-effort */ #define _BRCMS_PREC_EE 6 /* EE - Excellent-effort */ #define _BRCMS_PREC_CL 8 /* CL - Controlled Load */ #define _BRCMS_PREC_VI 10 /* Vi - Video */ #define _BRCMS_PREC_VO 12 /* Vo - Voice */ #define _BRCMS_PREC_NC 14 /* NC - Network Control */ #define MAXMACLIST 64 /* max # source MAC matches */ #define BCN_TEMPLATE_COUNT 2 /* The BSS is generating beacons in HW */ #define BRCMS_BSSCFG_HW_BCN 0x20 #define HWBCN_ENAB(cfg) (((cfg)->flags & BRCMS_BSSCFG_HW_BCN) != 0) #define MBSS_BCN_ENAB(cfg) 0 #define MBSS_PRB_ENAB(cfg) 0 #define SOFTBCN_ENAB(pub) (0) /* 802.1D Priority to precedence queue mapping */ const u8 wlc_prio2prec_map[] = { _BRCMS_PREC_BE, /* 0 BE - Best-effort */ _BRCMS_PREC_BK, /* 1 BK - Background */ _BRCMS_PREC_NONE, /* 2 None = - */ _BRCMS_PREC_EE, /* 3 EE - Excellent-effort */ _BRCMS_PREC_CL, /* 4 CL - Controlled Load */ _BRCMS_PREC_VI, /* 5 Vi - Video */ _BRCMS_PREC_VO, /* 6 Vo - Voice */ _BRCMS_PREC_NC, /* 7 NC - Network Control */ }; /* Check if a particular BSS config is AP or STA */ #define BSSCFG_AP(cfg) (0) #define BSSCFG_STA(cfg) (1) #define BSSCFG_IBSS(cfg) (!(cfg)->BSS) /* As above for all non-NULL BSS configs */ #define FOREACH_BSS(wlc, idx, cfg) \ for (idx = 0; (int) idx < BRCMS_MAXBSSCFG; idx++) \ if ((cfg = (wlc)->bsscfg[idx])) /* TX FIFO number to WME/802.1E Access Category */ const u8 wme_fifo2ac[] = { AC_BK, AC_BE, AC_VI, AC_VO, AC_BE, AC_BE }; /* WME/802.1E Access Category to TX FIFO number */ static const u8 wme_ac2fifo[] = { 1, 0, 2, 3 }; static bool in_send_q; /* Shared memory location index for various AC params */ #define wme_shmemacindex(ac) wme_ac2fifo[ac] #ifdef BCMDBG static const char * const fifo_names[] = { "AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" }; #else static const char fifo_names[6][0]; #endif static const u8 acbitmap2maxprio[] = { PRIO_8021D_BE, PRIO_8021D_BE, PRIO_8021D_BK, PRIO_8021D_BK, PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VI, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO, PRIO_8021D_VO }; /* currently the best mechanism for determining SIFS is the band in use */ #define SIFS(band) ((band)->bandtype == BRCM_BAND_5G ? APHY_SIFS_TIME : \ BPHY_SIFS_TIME); /* local prototypes */ static u16 brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc, struct ieee80211_hw *hw, struct sk_buff *p, struct scb *scb, uint frag, uint nfrags, uint queue, uint next_frag_len, struct wsec_key *key, ratespec_t rspec_override); static void brcms_c_bss_default_init(struct brcms_c_info *wlc); static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc); static ratespec_t mac80211_wlc_set_nrate(struct brcms_c_info *wlc, struct brcms_band *cur_band, u32 int_val); static void brcms_c_tx_prec_map_init(struct brcms_c_info *wlc); static void brcms_c_watchdog(void *arg); static void brcms_c_watchdog_by_timer(void *arg); static u16 brcms_c_rate_shm_offset(struct brcms_c_info *wlc, u8 rate); static int brcms_c_set_rateset(struct brcms_c_info *wlc, wlc_rateset_t *rs_arg); static u8 brcms_c_local_constraint_qdbm(struct brcms_c_info *wlc); /* send and receive */ static struct brcms_txq_info *brcms_c_txq_alloc(struct brcms_c_info *wlc); static void brcms_c_txq_free(struct brcms_c_info *wlc, struct brcms_txq_info *qi); static void brcms_c_txflowcontrol_signal(struct brcms_c_info *wlc, struct brcms_txq_info *qi, bool on, int prio); static void brcms_c_txflowcontrol_reset(struct brcms_c_info *wlc); static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, ratespec_t rate, uint length, u8 *plcp); static void brcms_c_compute_ofdm_plcp(ratespec_t rate, uint length, u8 *plcp); static void brcms_c_compute_mimo_plcp(ratespec_t rate, uint length, u8 *plcp); static u16 brcms_c_compute_frame_dur(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type, uint next_frag_len); static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc, struct brcms_d11rxhdr *rxh); static void brcms_c_recvctl(struct brcms_c_info *wlc, struct d11rxhdr *rxh, struct sk_buff *p); static uint brcms_c_calc_frame_len(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type, uint dur); static uint brcms_c_calc_ack_time(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type); static uint brcms_c_calc_cts_time(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type); /* interrupt, up/down, band */ static void brcms_c_setband(struct brcms_c_info *wlc, uint bandunit); static chanspec_t brcms_c_init_chanspec(struct brcms_c_info *wlc); static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc, chanspec_t chanspec); static void brcms_c_bsinit(struct brcms_c_info *wlc); static int brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle, bool isOFDM, bool writeToShm); static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc); static bool brcms_c_radio_monitor_start(struct brcms_c_info *wlc); static void brcms_c_radio_timer(void *arg); static void brcms_c_radio_enable(struct brcms_c_info *wlc); static void brcms_c_radio_upd(struct brcms_c_info *wlc); /* scan, association, BSS */ static uint brcms_c_calc_ba_time(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type); static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap); static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val); static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val); static void brcms_c_war16165(struct brcms_c_info *wlc, bool tx); static void brcms_c_wme_retries_write(struct brcms_c_info *wlc); static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc); static uint brcms_c_attach_module(struct brcms_c_info *wlc); static void brcms_c_detach_module(struct brcms_c_info *wlc); static void brcms_c_timers_deinit(struct brcms_c_info *wlc); static void brcms_c_down_led_upd(struct brcms_c_info *wlc); static uint brcms_c_down_del_timer(struct brcms_c_info *wlc); static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc); static int _brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len, struct brcms_c_if *wlcif); /* conditions under which the PM bit should be set in outgoing frames and STAY_AWAKE is meaningful */ bool brcms_c_ps_allowed(struct brcms_c_info *wlc) { int idx; struct brcms_bss_cfg *cfg; /* disallow PS when one of the following global conditions meets */ if (!wlc->pub->associated) return false; /* disallow PS when one of these meets when not scanning */ if (AP_ACTIVE(wlc) || wlc->monitor) return false; for (idx = 0; idx < BRCMS_MAXBSSCFG; idx++) { cfg = wlc->bsscfg[idx]; if (cfg && BSSCFG_STA(cfg) && cfg->associated) { /* * disallow PS when one of the following * bsscfg specific conditions meets */ if (!cfg->BSS || !BRCMS_PORTOPEN(cfg)) return false; if (!cfg->dtim_programmed) return false; } } return true; } void brcms_c_reset(struct brcms_c_info *wlc) { BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); /* slurp up hw mac counters before core reset */ brcms_c_statsupd(wlc); /* reset our snapshot of macstat counters */ memset((char *)wlc->core->macstat_snapshot, 0, sizeof(struct macstat)); brcms_b_reset(wlc->hw); } void brcms_c_fatal_error(struct brcms_c_info *wlc) { wiphy_err(wlc->wiphy, "wl%d: fatal error, reinitializing\n", wlc->pub->unit); brcms_init(wlc->wl); } /* Return the channel the driver should initialize during brcms_c_init. * the channel may have to be changed from the currently configured channel * if other configurations are in conflict (bandlocked, 11n mode disabled, * invalid channel for current country, etc.) */ static chanspec_t brcms_c_init_chanspec(struct brcms_c_info *wlc) { chanspec_t chanspec = 1 | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE | WL_CHANSPEC_BAND_2G; return chanspec; } struct scb global_scb; static void brcms_c_init_scb(struct brcms_c_info *wlc, struct scb *scb) { int i; scb->flags = SCB_WMECAP | SCB_HTCAP; for (i = 0; i < NUMPRIO; i++) scb->seqnum[i] = 0; } void brcms_c_init(struct brcms_c_info *wlc) { d11regs_t *regs; chanspec_t chanspec; int i; struct brcms_bss_cfg *bsscfg; bool mute = false; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); regs = wlc->regs; /* This will happen if a big-hammer was executed. In that case, we want to go back * to the channel that we were on and not new channel */ if (wlc->pub->associated) chanspec = wlc->home_chanspec; else chanspec = brcms_c_init_chanspec(wlc); brcms_b_init(wlc->hw, chanspec, mute); /* update beacon listen interval */ brcms_c_bcn_li_upd(wlc); /* the world is new again, so is our reported rate */ brcms_c_reprate_init(wlc); /* write ethernet address to core */ FOREACH_BSS(wlc, i, bsscfg) { brcms_c_set_mac(bsscfg); brcms_c_set_bssid(bsscfg); } /* Update tsf_cfprep if associated and up */ if (wlc->pub->associated) { FOREACH_BSS(wlc, i, bsscfg) { if (bsscfg->up) { u32 bi; /* get beacon period and convert to uS */ bi = bsscfg->current_bss->beacon_period << 10; /* * update since init path would reset * to default value */ W_REG(®s->tsf_cfprep, (bi << CFPREP_CBI_SHIFT)); /* Update maccontrol PM related bits */ brcms_c_set_ps_ctrl(wlc); break; } } } brcms_c_bandinit_ordered(wlc, chanspec); brcms_c_init_scb(wlc, &global_scb); /* init probe response timeout */ brcms_c_write_shm(wlc, M_PRS_MAXTIME, wlc->prb_resp_timeout); /* init max burst txop (framebursting) */ brcms_c_write_shm(wlc, M_MBURST_TXOP, (wlc-> _rifs ? (EDCF_AC_VO_TXOP_AP << 5) : MAXFRAMEBURST_TXOP)); /* initialize maximum allowed duty cycle */ brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_ofdm, true, true); brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_cck, false, true); /* Update some shared memory locations related to max AMPDU size allowed to received */ brcms_c_ampdu_shm_upd(wlc->ampdu); /* band-specific inits */ brcms_c_bsinit(wlc); /* Enable EDCF mode (while the MAC is suspended) */ if (EDCF_ENAB(wlc->pub)) { OR_REG(®s->ifs_ctl, IFS_USEEDCF); brcms_c_edcf_setparams(wlc, false); } /* Init precedence maps for empty FIFOs */ brcms_c_tx_prec_map_init(wlc); /* read the ucode version if we have not yet done so */ if (wlc->ucode_rev == 0) { wlc->ucode_rev = brcms_c_read_shm(wlc, M_BOM_REV_MAJOR) << NBITS(u16); wlc->ucode_rev |= brcms_c_read_shm(wlc, M_BOM_REV_MINOR); } /* ..now really unleash hell (allow the MAC out of suspend) */ brcms_c_enable_mac(wlc); /* clear tx flow control */ brcms_c_txflowcontrol_reset(wlc); /* clear tx data fifo suspends */ wlc->tx_suspended = false; /* enable the RF Disable Delay timer */ W_REG(&wlc->regs->rfdisabledly, RFDISABLE_DEFAULT); /* initialize mpc delay */ wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; /* * Initialize WME parameters; if they haven't been set by some other * mechanism (IOVar, etc) then read them from the hardware. */ if (BRCMS_WME_RETRY_SHORT_GET(wlc, 0) == 0) { /* Uninitialized; read from HW */ int ac; for (ac = 0; ac < AC_COUNT; ac++) { wlc->wme_retries[ac] = brcms_c_read_shm(wlc, M_AC_TXLMT_ADDR(ac)); } } } void brcms_c_mac_bcn_promisc_change(struct brcms_c_info *wlc, bool promisc) { wlc->bcnmisc_monitor = promisc; brcms_c_mac_bcn_promisc(wlc); } void brcms_c_mac_bcn_promisc(struct brcms_c_info *wlc) { if ((AP_ENAB(wlc->pub) && (N_ENAB(wlc->pub) || wlc->band->gmode)) || wlc->bcnmisc_ibss || wlc->bcnmisc_scan || wlc->bcnmisc_monitor) brcms_c_mctrl(wlc, MCTL_BCNS_PROMISC, MCTL_BCNS_PROMISC); else brcms_c_mctrl(wlc, MCTL_BCNS_PROMISC, 0); } /* set or clear maccontrol bits MCTL_PROMISC and MCTL_KEEPCONTROL */ void brcms_c_mac_promisc(struct brcms_c_info *wlc) { u32 promisc_bits = 0; /* promiscuous mode just sets MCTL_PROMISC * Note: APs get all BSS traffic without the need to set the MCTL_PROMISC bit * since all BSS data traffic is directed at the AP */ if (PROMISC_ENAB(wlc->pub) && !AP_ENAB(wlc->pub)) promisc_bits |= MCTL_PROMISC; /* monitor mode needs both MCTL_PROMISC and MCTL_KEEPCONTROL * Note: monitor mode also needs MCTL_BCNS_PROMISC, but that is * handled in brcms_c_mac_bcn_promisc() */ if (MONITOR_ENAB(wlc)) promisc_bits |= MCTL_PROMISC | MCTL_KEEPCONTROL; brcms_c_mctrl(wlc, MCTL_PROMISC | MCTL_KEEPCONTROL, promisc_bits); } /* push sw hps and wake state through hardware */ void brcms_c_set_ps_ctrl(struct brcms_c_info *wlc) { u32 v1, v2; bool hps; bool awake_before; hps = PS_ALLOWED(wlc); BCMMSG(wlc->wiphy, "wl%d: hps %d\n", wlc->pub->unit, hps); v1 = R_REG(&wlc->regs->maccontrol); v2 = MCTL_WAKE; if (hps) v2 |= MCTL_HPS; brcms_c_mctrl(wlc, MCTL_WAKE | MCTL_HPS, v2); awake_before = ((v1 & MCTL_WAKE) || ((v1 & MCTL_HPS) == 0)); if (!awake_before) brcms_b_wait_for_wake(wlc->hw); } /* * Write this BSS config's MAC address to core. * Updates RXE match engine. */ int brcms_c_set_mac(struct brcms_bss_cfg *cfg) { int err = 0; struct brcms_c_info *wlc = cfg->wlc; if (cfg == wlc->cfg) { /* enter the MAC addr into the RXE match registers */ brcms_c_set_addrmatch(wlc, RCM_MAC_OFFSET, cfg->cur_etheraddr); } brcms_c_ampdu_macaddr_upd(wlc); return err; } /* Write the BSS config's BSSID address to core (set_bssid in d11procs.tcl). * Updates RXE match engine. */ void brcms_c_set_bssid(struct brcms_bss_cfg *cfg) { struct brcms_c_info *wlc = cfg->wlc; /* if primary config, we need to update BSSID in RXE match registers */ if (cfg == wlc->cfg) { brcms_c_set_addrmatch(wlc, RCM_BSSID_OFFSET, cfg->BSSID); } #ifdef SUPPORT_HWKEYS else if (BSSCFG_STA(cfg) && cfg->BSS) { brcms_c_rcmta_add_bssid(wlc, cfg); } #endif } /* * Suspend the the MAC and update the slot timing * for standard 11b/g (20us slots) or shortslot 11g (9us slots). */ void brcms_c_switch_shortslot(struct brcms_c_info *wlc, bool shortslot) { int idx; struct brcms_bss_cfg *cfg; /* use the override if it is set */ if (wlc->shortslot_override != BRCMS_SHORTSLOT_AUTO) shortslot = (wlc->shortslot_override == BRCMS_SHORTSLOT_ON); if (wlc->shortslot == shortslot) return; wlc->shortslot = shortslot; /* update the capability based on current shortslot mode */ FOREACH_BSS(wlc, idx, cfg) { if (!cfg->associated) continue; cfg->current_bss->capability &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME; if (wlc->shortslot) cfg->current_bss->capability |= WLAN_CAPABILITY_SHORT_SLOT_TIME; } brcms_b_set_shortslot(wlc->hw, shortslot); } static u8 brcms_c_local_constraint_qdbm(struct brcms_c_info *wlc) { u8 local; s16 local_max; local = BRCMS_TXPWR_MAX; if (wlc->pub->associated && (brcmu_chspec_ctlchan(wlc->chanspec) == brcmu_chspec_ctlchan(wlc->home_chanspec))) { /* get the local power constraint if we are on the AP's * channel [802.11h, 7.3.2.13] */ /* Clamp the value between 0 and BRCMS_TXPWR_MAX w/o * overflowing the target */ local_max = (wlc->txpwr_local_max - wlc->txpwr_local_constraint) * BRCMS_TXPWR_DB_FACTOR; if (local_max > 0 && local_max < BRCMS_TXPWR_MAX) return (u8) local_max; if (local_max < 0) return 0; } return local; } /* propagate home chanspec to all bsscfgs in case bsscfg->current_bss->chanspec is referenced */ void brcms_c_set_home_chanspec(struct brcms_c_info *wlc, chanspec_t chanspec) { if (wlc->home_chanspec != chanspec) { int idx; struct brcms_bss_cfg *cfg; wlc->home_chanspec = chanspec; FOREACH_BSS(wlc, idx, cfg) { if (!cfg->associated) continue; cfg->current_bss->chanspec = chanspec; } } } static void brcms_c_set_phy_chanspec(struct brcms_c_info *wlc, chanspec_t chanspec) { /* Save our copy of the chanspec */ wlc->chanspec = chanspec; /* Set the chanspec and power limits for this locale after computing * any 11h local tx power constraints. */ brcms_c_channel_set_chanspec(wlc->cmi, chanspec, brcms_c_local_constraint_qdbm(wlc)); if (wlc->stf->ss_algosel_auto) brcms_c_stf_ss_algo_channel_get(wlc, &wlc->stf->ss_algo_channel, chanspec); brcms_c_stf_ss_update(wlc, wlc->band); } void brcms_c_set_chanspec(struct brcms_c_info *wlc, chanspec_t chanspec) { uint bandunit; bool switchband = false; chanspec_t old_chanspec = wlc->chanspec; if (!brcms_c_valid_chanspec_db(wlc->cmi, chanspec)) { wiphy_err(wlc->wiphy, "wl%d: %s: Bad channel %d\n", wlc->pub->unit, __func__, CHSPEC_CHANNEL(chanspec)); return; } /* Switch bands if necessary */ if (NBANDS(wlc) > 1) { bandunit = CHSPEC_BANDUNIT(chanspec); if (wlc->band->bandunit != bandunit || wlc->bandinit_pending) { switchband = true; if (wlc->bandlocked) { wiphy_err(wlc->wiphy, "wl%d: %s: chspec %d " "band is locked!\n", wlc->pub->unit, __func__, CHSPEC_CHANNEL(chanspec)); return; } /* * should the setband call come after the * brcms_b_chanspec() ? if the setband updates * (brcms_c_bsinit) use low level calls to inspect and * set state, the state inspected may be from the wrong * band, or the following brcms_b_set_chanspec() may * undo the work. */ brcms_c_setband(wlc, bandunit); } } /* sync up phy/radio chanspec */ brcms_c_set_phy_chanspec(wlc, chanspec); /* init antenna selection */ if (CHSPEC_WLC_BW(old_chanspec) != CHSPEC_WLC_BW(chanspec)) { brcms_c_antsel_init(wlc->asi); /* Fix the hardware rateset based on bw. * Mainly add MCS32 for 40Mhz, remove MCS 32 for 20Mhz */ brcms_c_rateset_bw_mcs_filter(&wlc->band->hw_rateset, wlc->band-> mimo_cap_40 ? CHSPEC_WLC_BW(chanspec) : 0); } /* update some mac configuration since chanspec changed */ brcms_c_ucode_mac_upd(wlc); } ratespec_t brcms_c_lowest_basic_rspec(struct brcms_c_info *wlc, wlc_rateset_t *rs) { ratespec_t lowest_basic_rspec; uint i; /* Use the lowest basic rate */ lowest_basic_rspec = rs->rates[0] & BRCMS_RATE_MASK; for (i = 0; i < rs->count; i++) { if (rs->rates[i] & BRCMS_RATE_FLAG) { lowest_basic_rspec = rs->rates[i] & BRCMS_RATE_MASK; break; } } #if NCONF /* pick siso/cdd as default for OFDM (note no basic rate MCSs are supported yet) */ if (IS_OFDM(lowest_basic_rspec)) { lowest_basic_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT); } #endif return lowest_basic_rspec; } /* This function changes the phytxctl for beacon based on current beacon ratespec AND txant * setting as per this table: * ratespec CCK ant = wlc->stf->txant * OFDM ant = 3 */ void brcms_c_beacon_phytxctl_txant_upd(struct brcms_c_info *wlc, ratespec_t bcn_rspec) { u16 phyctl; u16 phytxant = wlc->stf->phytxant; u16 mask = PHY_TXC_ANT_MASK; /* for non-siso rates or default setting, use the available chains */ if (BRCMS_PHY_11N_CAP(wlc->band)) phytxant = brcms_c_stf_phytxchain_sel(wlc, bcn_rspec); phyctl = brcms_c_read_shm(wlc, M_BCN_PCTLWD); phyctl = (phyctl & ~mask) | phytxant; brcms_c_write_shm(wlc, M_BCN_PCTLWD, phyctl); } /* centralized protection config change function to simplify debugging, no consistency checking * this should be called only on changes to avoid overhead in periodic function */ void brcms_c_protection_upd(struct brcms_c_info *wlc, uint idx, int val) { BCMMSG(wlc->wiphy, "idx %d, val %d\n", idx, val); switch (idx) { case BRCMS_PROT_G_SPEC: wlc->protection->_g = (bool) val; break; case BRCMS_PROT_G_OVR: wlc->protection->g_override = (s8) val; break; case BRCMS_PROT_G_USER: wlc->protection->gmode_user = (u8) val; break; case BRCMS_PROT_OVERLAP: wlc->protection->overlap = (s8) val; break; case BRCMS_PROT_N_USER: wlc->protection->nmode_user = (s8) val; break; case BRCMS_PROT_N_CFG: wlc->protection->n_cfg = (s8) val; break; case BRCMS_PROT_N_CFG_OVR: wlc->protection->n_cfg_override = (s8) val; break; case BRCMS_PROT_N_NONGF: wlc->protection->nongf = (bool) val; break; case BRCMS_PROT_N_NONGF_OVR: wlc->protection->nongf_override = (s8) val; break; case BRCMS_PROT_N_PAM_OVR: wlc->protection->n_pam_override = (s8) val; break; case BRCMS_PROT_N_OBSS: wlc->protection->n_obss = (bool) val; break; default: break; } } static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val) { wlc->ht_cap.cap_info &= ~(IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40); wlc->ht_cap.cap_info |= (val & BRCMS_N_SGI_20) ? IEEE80211_HT_CAP_SGI_20 : 0; wlc->ht_cap.cap_info |= (val & BRCMS_N_SGI_40) ? IEEE80211_HT_CAP_SGI_40 : 0; if (wlc->pub->up) { brcms_c_update_beacon(wlc); brcms_c_update_probe_resp(wlc, true); } } static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val) { wlc->stf->ldpc = val; wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_LDPC_CODING; if (wlc->stf->ldpc != OFF) wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_LDPC_CODING; if (wlc->pub->up) { brcms_c_update_beacon(wlc); brcms_c_update_probe_resp(wlc, true); wlc_phy_ldpc_override_set(wlc->band->pi, (val ? true : false)); } } /* * ucode, hwmac update * Channel dependent updates for ucode and hw */ static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc) { /* enable or disable any active IBSSs depending on whether or not * we are on the home channel */ if (wlc->home_chanspec == BRCMS_BAND_PI_RADIO_CHANSPEC) { if (wlc->pub->associated) { /* BMAC_NOTE: This is something that should be fixed in ucode inits. * I think that the ucode inits set up the bcn templates and shm values * with a bogus beacon. This should not be done in the inits. If ucode needs * to set up a beacon for testing, the test routines should write it down, * not expect the inits to populate a bogus beacon. */ if (BRCMS_PHY_11N_CAP(wlc->band)) { brcms_c_write_shm(wlc, M_BCN_TXTSF_OFFSET, wlc->band->bcntsfoff); } } } else { /* disable an active IBSS if we are not on the home channel */ } /* update the various promisc bits */ brcms_c_mac_bcn_promisc(wlc); brcms_c_mac_promisc(wlc); } static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc, chanspec_t chanspec) { wlc_rateset_t default_rateset; uint parkband; uint i, band_order[2]; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); /* * We might have been bandlocked during down and the chip power-cycled (hibernate). * figure out the right band to park on */ if (wlc->bandlocked || NBANDS(wlc) == 1) { /* updated in brcms_c_bandlock() */ parkband = wlc->band->bandunit; band_order[0] = band_order[1] = parkband; } else { /* park on the band of the specified chanspec */ parkband = CHSPEC_BANDUNIT(chanspec); /* order so that parkband initialize last */ band_order[0] = parkband ^ 1; band_order[1] = parkband; } /* make each band operational, software state init */ for (i = 0; i < NBANDS(wlc); i++) { uint j = band_order[i]; wlc->band = wlc->bandstate[j]; brcms_default_rateset(wlc, &default_rateset); /* fill in hw_rate */ brcms_c_rateset_filter(&default_rateset, &wlc->band->hw_rateset, false, BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK, (bool) N_ENAB(wlc->pub)); /* init basic rate lookup */ brcms_c_rate_lookup_init(wlc, &default_rateset); } /* sync up phy/radio chanspec */ brcms_c_set_phy_chanspec(wlc, chanspec); } /* band-specific init */ static void brcms_c_bsinit(struct brcms_c_info *wlc) { BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc->pub->unit, wlc->band->bandunit); /* write ucode ACK/CTS rate table */ brcms_c_set_ratetable(wlc); /* update some band specific mac configuration */ brcms_c_ucode_mac_upd(wlc); /* init antenna selection */ brcms_c_antsel_init(wlc->asi); } /* switch to and initialize new band */ static void brcms_c_setband(struct brcms_c_info *wlc, uint bandunit) { int idx; struct brcms_bss_cfg *cfg; wlc->band = wlc->bandstate[bandunit]; if (!wlc->pub->up) return; /* wait for at least one beacon before entering sleeping state */ for (idx = 0; idx < BRCMS_MAXBSSCFG; idx++) { cfg = wlc->bsscfg[idx]; if (cfg && BSSCFG_STA(cfg) && cfg->associated) cfg->PMawakebcn = true; } brcms_c_set_ps_ctrl(wlc); /* band-specific initializations */ brcms_c_bsinit(wlc); } /* Initialize a WME Parameter Info Element with default STA parameters from WMM Spec, Table 12 */ void brcms_c_wme_initparams_sta(struct brcms_c_info *wlc, struct wme_param_ie *pe) { static const struct wme_param_ie stadef = { WME_OUI, WME_TYPE, WME_SUBTYPE_PARAM_IE, WME_VER, 0, 0, { {EDCF_AC_BE_ACI_STA, EDCF_AC_BE_ECW_STA, cpu_to_le16(EDCF_AC_BE_TXOP_STA)}, {EDCF_AC_BK_ACI_STA, EDCF_AC_BK_ECW_STA, cpu_to_le16(EDCF_AC_BK_TXOP_STA)}, {EDCF_AC_VI_ACI_STA, EDCF_AC_VI_ECW_STA, cpu_to_le16(EDCF_AC_VI_TXOP_STA)}, {EDCF_AC_VO_ACI_STA, EDCF_AC_VO_ECW_STA, cpu_to_le16(EDCF_AC_VO_TXOP_STA)} } }; memcpy(pe, &stadef, sizeof(*pe)); } void brcms_c_wme_setparams(struct brcms_c_info *wlc, u16 aci, const struct ieee80211_tx_queue_params *params, bool suspend) { int i; struct shm_acparams acp_shm; u16 *shm_entry; /* Only apply params if the core is out of reset and has clocks */ if (!wlc->clk) { wiphy_err(wlc->wiphy, "wl%d: %s : no-clock\n", wlc->pub->unit, __func__); return; } do { memset((char *)&acp_shm, 0, sizeof(struct shm_acparams)); /* fill in shm ac params struct */ acp_shm.txop = le16_to_cpu(params->txop); /* convert from units of 32us to us for ucode */ wlc->edcf_txop[aci & 0x3] = acp_shm.txop = EDCF_TXOP2USEC(acp_shm.txop); acp_shm.aifs = (params->aifs & EDCF_AIFSN_MASK); if (aci == AC_VI && acp_shm.txop == 0 && acp_shm.aifs < EDCF_AIFSN_MAX) acp_shm.aifs++; if (acp_shm.aifs < EDCF_AIFSN_MIN || acp_shm.aifs > EDCF_AIFSN_MAX) { wiphy_err(wlc->wiphy, "wl%d: edcf_setparams: bad " "aifs %d\n", wlc->pub->unit, acp_shm.aifs); continue; } acp_shm.cwmin = params->cw_min; acp_shm.cwmax = params->cw_max; acp_shm.cwcur = acp_shm.cwmin; acp_shm.bslots = R_REG(&wlc->regs->tsf_random) & acp_shm.cwcur; acp_shm.reggap = acp_shm.bslots + acp_shm.aifs; /* Indicate the new params to the ucode */ acp_shm.status = brcms_c_read_shm(wlc, (M_EDCF_QINFO + wme_shmemacindex(aci) * M_EDCF_QLEN + M_EDCF_STATUS_OFF)); acp_shm.status |= WME_STATUS_NEWAC; /* Fill in shm acparam table */ shm_entry = (u16 *) &acp_shm; for (i = 0; i < (int)sizeof(struct shm_acparams); i += 2) brcms_c_write_shm(wlc, M_EDCF_QINFO + wme_shmemacindex(aci) * M_EDCF_QLEN + i, *shm_entry++); } while (0); if (suspend) brcms_c_suspend_mac_and_wait(wlc); if (suspend) brcms_c_enable_mac(wlc); } void brcms_c_edcf_setparams(struct brcms_c_info *wlc, bool suspend) { u16 aci; int i_ac; struct edcf_acparam *edcf_acp; struct ieee80211_tx_queue_params txq_pars; struct ieee80211_tx_queue_params *params = &txq_pars; /* * AP uses AC params from wme_param_ie_ap. * AP advertises AC params from wme_param_ie. * STA uses AC params from wme_param_ie. */ edcf_acp = (struct edcf_acparam *) &wlc->wme_param_ie.acparam[0]; for (i_ac = 0; i_ac < AC_COUNT; i_ac++, edcf_acp++) { /* find out which ac this set of params applies to */ aci = (edcf_acp->ACI & EDCF_ACI_MASK) >> EDCF_ACI_SHIFT; /* fill in shm ac params struct */ params->txop = edcf_acp->TXOP; params->aifs = edcf_acp->ACI; /* CWmin = 2^(ECWmin) - 1 */ params->cw_min = EDCF_ECW2CW(edcf_acp->ECW & EDCF_ECWMIN_MASK); /* CWmax = 2^(ECWmax) - 1 */ params->cw_max = EDCF_ECW2CW((edcf_acp->ECW & EDCF_ECWMAX_MASK) >> EDCF_ECWMAX_SHIFT); brcms_c_wme_setparams(wlc, aci, params, suspend); } if (suspend) brcms_c_suspend_mac_and_wait(wlc); if (AP_ENAB(wlc->pub) && WME_ENAB(wlc->pub)) { brcms_c_update_beacon(wlc); brcms_c_update_probe_resp(wlc, false); } if (suspend) brcms_c_enable_mac(wlc); } bool brcms_c_timers_init(struct brcms_c_info *wlc, int unit) { wlc->wdtimer = brcms_init_timer(wlc->wl, brcms_c_watchdog_by_timer, wlc, "watchdog"); if (!wlc->wdtimer) { wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for wdtimer " "failed\n", unit); goto fail; } wlc->radio_timer = brcms_init_timer(wlc->wl, brcms_c_radio_timer, wlc, "radio"); if (!wlc->radio_timer) { wiphy_err(wlc->wiphy, "wl%d: wl_init_timer for radio_timer " "failed\n", unit); goto fail; } return true; fail: return false; } /* * Initialize brcms_c_info default values ... * may get overrides later in this function */ void brcms_c_info_init(struct brcms_c_info *wlc, int unit) { int i; /* Assume the device is there until proven otherwise */ wlc->device_present = true; /* Save our copy of the chanspec */ wlc->chanspec = CH20MHZ_CHSPEC(1); /* various 802.11g modes */ wlc->shortslot = false; wlc->shortslot_override = BRCMS_SHORTSLOT_AUTO; brcms_c_protection_upd(wlc, BRCMS_PROT_G_OVR, BRCMS_PROTECTION_AUTO); brcms_c_protection_upd(wlc, BRCMS_PROT_G_SPEC, false); brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG_OVR, BRCMS_PROTECTION_AUTO); brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG, BRCMS_N_PROTECTION_OFF); brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF_OVR, BRCMS_PROTECTION_AUTO); brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF, false); brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, AUTO); brcms_c_protection_upd(wlc, BRCMS_PROT_OVERLAP, BRCMS_PROTECTION_CTL_OVERLAP); /* 802.11g draft 4.0 NonERP elt advertisement */ wlc->include_legacy_erp = true; wlc->stf->ant_rx_ovr = ANT_RX_DIV_DEF; wlc->stf->txant = ANT_TX_DEF; wlc->prb_resp_timeout = BRCMS_PRB_RESP_TIMEOUT; wlc->usr_fragthresh = DOT11_DEFAULT_FRAG_LEN; for (i = 0; i < NFIFO; i++) wlc->fragthresh[i] = DOT11_DEFAULT_FRAG_LEN; wlc->RTSThresh = DOT11_DEFAULT_RTS_LEN; /* default rate fallback retry limits */ wlc->SFBL = RETRY_SHORT_FB; wlc->LFBL = RETRY_LONG_FB; /* default mac retry limits */ wlc->SRL = RETRY_SHORT_DEF; wlc->LRL = RETRY_LONG_DEF; /* Set flag to indicate that hw keys should be used when available. */ wlc->wsec_swkeys = false; /* init the 4 static WEP default keys */ for (i = 0; i < WSEC_MAX_DEFAULT_KEYS; i++) { wlc->wsec_keys[i] = wlc->wsec_def_keys[i]; wlc->wsec_keys[i]->idx = (u8) i; } /* WME QoS mode is Auto by default */ wlc->pub->_wme = AUTO; #ifdef BCMSDIODEV_ENABLED wlc->pub->_priofc = true; /* enable priority flow control for sdio dongle */ #endif wlc->pub->_ampdu = AMPDU_AGG_HOST; wlc->pub->bcmerror = 0; wlc->pub->_coex = ON; /* initialize mpc delay */ wlc->mpc_delay_off = wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; } static bool brcms_c_state_bmac_sync(struct brcms_c_info *wlc) { struct brcms_b_state state_bmac; if (brcms_b_state_get(wlc->hw, &state_bmac) != 0) return false; wlc->machwcap = state_bmac.machwcap; brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, (s8) state_bmac.preamble_ovr); return true; } static uint brcms_c_attach_module(struct brcms_c_info *wlc) { uint err = 0; uint unit; unit = wlc->pub->unit; wlc->asi = brcms_c_antsel_attach(wlc); if (wlc->asi == NULL) { wiphy_err(wlc->wiphy, "wl%d: attach: antsel_attach " "failed\n", unit); err = 44; goto fail; } wlc->ampdu = brcms_c_ampdu_attach(wlc); if (wlc->ampdu == NULL) { wiphy_err(wlc->wiphy, "wl%d: attach: ampdu_attach " "failed\n", unit); err = 50; goto fail; } if ((brcms_c_stf_attach(wlc) != 0)) { wiphy_err(wlc->wiphy, "wl%d: attach: stf_attach " "failed\n", unit); err = 68; goto fail; } fail: return err; } struct brcms_pub *brcms_c_pub(void *wlc) { return ((struct brcms_c_info *) wlc)->pub; } #define CHIP_SUPPORTS_11N(wlc) 1 /* * The common driver entry routine. Error codes should be unique */ void *brcms_c_attach(struct brcms_info *wl, u16 vendor, u16 device, uint unit, bool piomode, void *regsva, uint bustype, void *btparam, uint *perr) { struct brcms_c_info *wlc; uint err = 0; uint j; struct brcms_pub *pub; uint n_disabled; /* allocate struct brcms_c_info state and its substructures */ wlc = (struct brcms_c_info *) brcms_c_attach_malloc(unit, &err, device); if (wlc == NULL) goto fail; wlc->wiphy = wl->wiphy; pub = wlc->pub; #if defined(BCMDBG) wlc_info_dbg = wlc; #endif wlc->band = wlc->bandstate[0]; wlc->core = wlc->corestate; wlc->wl = wl; pub->unit = unit; pub->_piomode = piomode; wlc->bandinit_pending = false; /* populate struct brcms_c_info with default values */ brcms_c_info_init(wlc, unit); /* update sta/ap related parameters */ brcms_c_ap_upd(wlc); /* 11n_disable nvram */ n_disabled = getintvar(pub->vars, "11n_disable"); /* * low level attach steps(all hw accesses go * inside, no more in rest of the attach) */ err = brcms_b_attach(wlc, vendor, device, unit, piomode, regsva, bustype, btparam); if (err) goto fail; /* for some states, due to different info pointer(e,g, wlc, wlc_hw) or master/slave split, * HIGH driver(both monolithic and HIGH_ONLY) needs to sync states FROM BMAC portion driver */ if (!brcms_c_state_bmac_sync(wlc)) { err = 20; goto fail; } pub->phy_11ncapable = BRCMS_PHY_11N_CAP(wlc->band); /* propagate *vars* from BMAC driver to high driver */ brcms_b_copyfrom_vars(wlc->hw, &pub->vars, &wlc->vars_size); /* set maximum allowed duty cycle */ wlc->tx_duty_cycle_ofdm = (u16) getintvar(pub->vars, "tx_duty_cycle_ofdm"); wlc->tx_duty_cycle_cck = (u16) getintvar(pub->vars, "tx_duty_cycle_cck"); brcms_c_stf_phy_chain_calc(wlc); /* txchain 1: txant 0, txchain 2: txant 1 */ if (BRCMS_ISNPHY(wlc->band) && (wlc->stf->txstreams == 1)) wlc->stf->txant = wlc->stf->hw_txchain - 1; /* push to BMAC driver */ wlc_phy_stf_chain_init(wlc->band->pi, wlc->stf->hw_txchain, wlc->stf->hw_rxchain); /* pull up some info resulting from the low attach */ { int i; for (i = 0; i < NFIFO; i++) wlc->core->txavail[i] = wlc->hw->txavail[i]; } brcms_b_hw_etheraddr(wlc->hw, wlc->perm_etheraddr); memcpy(&pub->cur_etheraddr, &wlc->perm_etheraddr, ETH_ALEN); for (j = 0; j < NBANDS(wlc); j++) { /* Use band 1 for single band 11a */ if (IS_SINGLEBAND_5G(wlc->deviceid)) j = BAND_5G_INDEX; wlc->band = wlc->bandstate[j]; if (!brcms_c_attach_stf_ant_init(wlc)) { err = 24; goto fail; } /* default contention windows size limits */ wlc->band->CWmin = APHY_CWMIN; wlc->band->CWmax = PHY_CWMAX; /* init gmode value */ if (BAND_2G(wlc->band->bandtype)) { wlc->band->gmode = GMODE_AUTO; brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, wlc->band->gmode); } /* init _n_enab supported mode */ if (BRCMS_PHY_11N_CAP(wlc->band) && CHIP_SUPPORTS_11N(wlc)) { if (n_disabled & WLFEATURE_DISABLE_11N) { pub->_n_enab = OFF; brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER, OFF); } else { pub->_n_enab = SUPPORT_11N; brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER, ((pub->_n_enab == SUPPORT_11N) ? WL_11N_2x2 : WL_11N_3x3)); } } /* init per-band default rateset, depend on band->gmode */ brcms_default_rateset(wlc, &wlc->band->defrateset); /* fill in hw_rateset (used early by BRCM_SET_RATESET) */ brcms_c_rateset_filter(&wlc->band->defrateset, &wlc->band->hw_rateset, false, BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK, (bool) N_ENAB(wlc->pub)); } /* update antenna config due to wlc->stf->txant/txchain/ant_rx_ovr change */ brcms_c_stf_phy_txant_upd(wlc); /* attach each modules */ err = brcms_c_attach_module(wlc); if (err != 0) goto fail; if (!brcms_c_timers_init(wlc, unit)) { wiphy_err(wl->wiphy, "wl%d: %s: init_timer failed\n", unit, __func__); err = 32; goto fail; } /* depend on rateset, gmode */ wlc->cmi = brcms_c_channel_mgr_attach(wlc); if (!wlc->cmi) { wiphy_err(wl->wiphy, "wl%d: %s: channel_mgr_attach failed" "\n", unit, __func__); err = 33; goto fail; } /* init default when all parameters are ready, i.e. ->rateset */ brcms_c_bss_default_init(wlc); /* * Complete the wlc default state initializations.. */ /* allocate our initial queue */ wlc->pkt_queue = brcms_c_txq_alloc(wlc); if (wlc->pkt_queue == NULL) { wiphy_err(wl->wiphy, "wl%d: %s: failed to malloc tx queue\n", unit, __func__); err = 100; goto fail; } wlc->bsscfg[0] = wlc->cfg; wlc->cfg->_idx = 0; wlc->cfg->wlc = wlc; pub->txmaxpkts = MAXTXPKTS; brcms_c_wme_initparams_sta(wlc, &wlc->wme_param_ie); wlc->mimoft = FT_HT; wlc->ht_cap.cap_info = HT_CAP; if (HT_ENAB(wlc->pub)) wlc->stf->ldpc = AUTO; wlc->mimo_40txbw = AUTO; wlc->ofdm_40txbw = AUTO; wlc->cck_40txbw = AUTO; brcms_c_update_mimo_band_bwcap(wlc, BRCMS_N_BW_20IN2G_40IN5G); /* Set default values of SGI */ if (BRCMS_SGI_CAP_PHY(wlc)) { brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 | BRCMS_N_SGI_40)); wlc->sgi_tx = AUTO; } else if (BRCMS_ISSSLPNPHY(wlc->band)) { brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 | BRCMS_N_SGI_40)); wlc->sgi_tx = AUTO; } else { brcms_c_ht_update_sgi_rx(wlc, 0); wlc->sgi_tx = OFF; } /* *******nvram 11n config overrides Start ********* */ /* apply the sgi override from nvram conf */ if (n_disabled & WLFEATURE_DISABLE_11N_SGI_TX) wlc->sgi_tx = OFF; if (n_disabled & WLFEATURE_DISABLE_11N_SGI_RX) brcms_c_ht_update_sgi_rx(wlc, 0); /* apply the stbc override from nvram conf */ if (n_disabled & WLFEATURE_DISABLE_11N_STBC_TX) { wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF; wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF; wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC; } if (n_disabled & WLFEATURE_DISABLE_11N_STBC_RX) brcms_c_stf_stbc_rx_set(wlc, HT_CAP_RX_STBC_NO); /* apply the GF override from nvram conf */ if (n_disabled & WLFEATURE_DISABLE_11N_GF) wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_GRN_FLD; /* initialize radio_mpc_disable according to wlc->mpc */ brcms_c_radio_mpc_upd(wlc); brcms_b_antsel_set(wlc->hw, wlc->asi->antsel_avail); if (perr) *perr = 0; return (void *)wlc; fail: wiphy_err(wl->wiphy, "wl%d: %s: failed with err %d\n", unit, __func__, err); if (wlc) brcms_c_detach(wlc); if (perr) *perr = err; return NULL; } static void brcms_c_attach_antgain_init(struct brcms_c_info *wlc) { uint unit; unit = wlc->pub->unit; if ((wlc->band->antgain == -1) && (wlc->pub->sromrev == 1)) { /* default antenna gain for srom rev 1 is 2 dBm (8 qdbm) */ wlc->band->antgain = 8; } else if (wlc->band->antgain == -1) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in" " srom, using 2dB\n", unit, __func__); wlc->band->antgain = 8; } else { s8 gain, fract; /* Older sroms specified gain in whole dbm only. In order * be able to specify qdbm granularity and remain backward compatible * the whole dbms are now encoded in only low 6 bits and remaining qdbms * are encoded in the hi 2 bits. 6 bit signed number ranges from * -32 - 31. Examples: 0x1 = 1 db, * 0xc1 = 1.75 db (1 + 3 quarters), * 0x3f = -1 (-1 + 0 quarters), * 0x7f = -.75 (-1 in low 6 bits + 1 quarters in hi 2 bits) = -3 qdbm. * 0xbf = -.50 (-1 in low 6 bits + 2 quarters in hi 2 bits) = -2 qdbm. */ gain = wlc->band->antgain & 0x3f; gain <<= 2; /* Sign extend */ gain >>= 2; fract = (wlc->band->antgain & 0xc0) >> 6; wlc->band->antgain = 4 * gain + fract; } } static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc) { int aa; uint unit; char *vars; int bandtype; unit = wlc->pub->unit; vars = wlc->pub->vars; bandtype = wlc->band->bandtype; /* get antennas available */ aa = (s8) getintvar(vars, (BAND_5G(bandtype) ? "aa5g" : "aa2g")); if (aa == 0) aa = (s8) getintvar(vars, (BAND_5G(bandtype) ? "aa1" : "aa0")); if ((aa < 1) || (aa > 15)) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in" " srom (0x%x), using 3\n", unit, __func__, aa); aa = 3; } /* reset the defaults if we have a single antenna */ if (aa == 1) { wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_0; wlc->stf->txant = ANT_TX_FORCE_0; } else if (aa == 2) { wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_1; wlc->stf->txant = ANT_TX_FORCE_1; } else { } /* Compute Antenna Gain */ wlc->band->antgain = (s8) getintvar(vars, (BAND_5G(bandtype) ? "ag1" : "ag0")); brcms_c_attach_antgain_init(wlc); return true; } static void brcms_c_timers_deinit(struct brcms_c_info *wlc) { /* free timer state */ if (wlc->wdtimer) { brcms_free_timer(wlc->wl, wlc->wdtimer); wlc->wdtimer = NULL; } if (wlc->radio_timer) { brcms_free_timer(wlc->wl, wlc->radio_timer); wlc->radio_timer = NULL; } } static void brcms_c_detach_module(struct brcms_c_info *wlc) { if (wlc->asi) { brcms_c_antsel_detach(wlc->asi); wlc->asi = NULL; } if (wlc->ampdu) { brcms_c_ampdu_detach(wlc->ampdu); wlc->ampdu = NULL; } brcms_c_stf_detach(wlc); } /* * Return a count of the number of driver callbacks still pending. * * General policy is that brcms_c_detach can only dealloc/free software states. * It can NOT touch hardware registers since the d11core may be in reset and * clock may not be available. * One exception is sb register access, which is possible if crystal is turned * on after "down" state, driver should avoid software timer with the exception * of radio_monitor. */ uint brcms_c_detach(struct brcms_c_info *wlc) { uint callbacks = 0; if (wlc == NULL) return 0; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); callbacks += brcms_b_detach(wlc); /* delete software timers */ if (!brcms_c_radio_monitor_stop(wlc)) callbacks++; brcms_c_channel_mgr_detach(wlc->cmi); brcms_c_timers_deinit(wlc); brcms_c_detach_module(wlc); while (wlc->tx_queues != NULL) brcms_c_txq_free(wlc, wlc->tx_queues); brcms_c_detach_mfree(wlc); return callbacks; } /* update state that depends on the current value of "ap" */ void brcms_c_ap_upd(struct brcms_c_info *wlc) { if (AP_ENAB(wlc->pub)) /* AP: short not allowed, but not enforced */ wlc->PLCPHdr_override = BRCMS_PLCP_AUTO; else /* STA-BSS; short capable */ wlc->PLCPHdr_override = BRCMS_PLCP_SHORT; /* fixup mpc */ wlc->mpc = true; } /* read hwdisable state and propagate to wlc flag */ static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc) { if (wlc->pub->wlfeatureflag & WL_SWFL_NOHWRADIO || wlc->pub->hw_off) return; if (brcms_b_radio_read_hwdisabled(wlc->hw)) { mboolset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE); } else { mboolclr(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE); } } /* return true if Minimum Power Consumption should be entered, false otherwise */ bool brcms_c_is_non_delay_mpc(struct brcms_c_info *wlc) { return false; } bool brcms_c_ismpc(struct brcms_c_info *wlc) { return (wlc->mpc_delay_off == 0) && (brcms_c_is_non_delay_mpc(wlc)); } void brcms_c_radio_mpc_upd(struct brcms_c_info *wlc) { bool mpc_radio, radio_state; /* * Clear the WL_RADIO_MPC_DISABLE bit when mpc feature is disabled * in case the WL_RADIO_MPC_DISABLE bit was set. Stop the radio * monitor also when WL_RADIO_MPC_DISABLE is the only reason that * the radio is going down. */ if (!wlc->mpc) { if (!wlc->pub->radio_disabled) return; mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE); brcms_c_radio_upd(wlc); if (!wlc->pub->radio_disabled) brcms_c_radio_monitor_stop(wlc); return; } /* * sync ismpc logic with WL_RADIO_MPC_DISABLE bit in wlc->pub->radio_disabled * to go ON, always call radio_upd synchronously * to go OFF, postpone radio_upd to later when context is safe(e.g. watchdog) */ radio_state = (mboolisset(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE) ? OFF : ON); mpc_radio = (brcms_c_ismpc(wlc) == true) ? OFF : ON; if (radio_state == ON && mpc_radio == OFF) wlc->mpc_delay_off = wlc->mpc_dlycnt; else if (radio_state == OFF && mpc_radio == ON) { mboolclr(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE); brcms_c_radio_upd(wlc); if (wlc->mpc_offcnt < BRCMS_MPC_THRESHOLD) wlc->mpc_dlycnt = BRCMS_MPC_MAX_DELAYCNT; else wlc->mpc_dlycnt = BRCMS_MPC_MIN_DELAYCNT; wlc->mpc_dur += OSL_SYSUPTIME() - wlc->mpc_laston_ts; } /* Below logic is meant to capture the transition from mpc off to mpc on for reasons * other than wlc->mpc_delay_off keeping the mpc off. In that case reset * wlc->mpc_delay_off to wlc->mpc_dlycnt, so that we restart the countdown of mpc_delay_off */ if ((wlc->prev_non_delay_mpc == false) && (brcms_c_is_non_delay_mpc(wlc) == true) && wlc->mpc_delay_off) { wlc->mpc_delay_off = wlc->mpc_dlycnt; } wlc->prev_non_delay_mpc = brcms_c_is_non_delay_mpc(wlc); } /* * centralized radio disable/enable function, * invoke radio enable/disable after updating hwradio status */ static void brcms_c_radio_upd(struct brcms_c_info *wlc) { if (wlc->pub->radio_disabled) { brcms_c_radio_disable(wlc); } else { brcms_c_radio_enable(wlc); } } /* maintain LED behavior in down state */ static void brcms_c_down_led_upd(struct brcms_c_info *wlc) { /* maintain LEDs while in down state, turn on sbclk if not available yet */ /* turn on sbclk if necessary */ if (!AP_ENAB(wlc->pub)) { brcms_c_pllreq(wlc, true, BRCMS_PLLREQ_FLIP); brcms_c_pllreq(wlc, false, BRCMS_PLLREQ_FLIP); } } /* update hwradio status and return it */ bool brcms_c_check_radio_disabled(struct brcms_c_info *wlc) { brcms_c_radio_hwdisable_upd(wlc); return mboolisset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE) ? true : false; } void brcms_c_radio_disable(struct brcms_c_info *wlc) { if (!wlc->pub->up) { brcms_c_down_led_upd(wlc); return; } brcms_c_radio_monitor_start(wlc); brcms_down(wlc->wl); } static void brcms_c_radio_enable(struct brcms_c_info *wlc) { if (wlc->pub->up) return; if (DEVICEREMOVED(wlc)) return; brcms_up(wlc->wl); } /* periodical query hw radio button while driver is "down" */ static void brcms_c_radio_timer(void *arg) { struct brcms_c_info *wlc = (struct brcms_c_info *) arg; if (DEVICEREMOVED(wlc)) { wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit, __func__); brcms_down(wlc->wl); return; } /* cap mpc off count */ if (wlc->mpc_offcnt < BRCMS_MPC_MAX_DELAYCNT) wlc->mpc_offcnt++; brcms_c_radio_hwdisable_upd(wlc); brcms_c_radio_upd(wlc); } static bool brcms_c_radio_monitor_start(struct brcms_c_info *wlc) { /* Don't start the timer if HWRADIO feature is disabled */ if (wlc->radio_monitor || (wlc->pub->wlfeatureflag & WL_SWFL_NOHWRADIO)) return true; wlc->radio_monitor = true; brcms_c_pllreq(wlc, true, BRCMS_PLLREQ_RADIO_MON); brcms_add_timer(wlc->wl, wlc->radio_timer, TIMER_INTERVAL_RADIOCHK, true); return true; } bool brcms_c_radio_monitor_stop(struct brcms_c_info *wlc) { if (!wlc->radio_monitor) return true; wlc->radio_monitor = false; brcms_c_pllreq(wlc, false, BRCMS_PLLREQ_RADIO_MON); return brcms_del_timer(wlc->wl, wlc->radio_timer); } static void brcms_c_watchdog_by_timer(void *arg) { brcms_c_watchdog(arg); } /* common watchdog code */ static void brcms_c_watchdog(void *arg) { struct brcms_c_info *wlc = (struct brcms_c_info *) arg; int i; struct brcms_bss_cfg *cfg; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); if (!wlc->pub->up) return; if (DEVICEREMOVED(wlc)) { wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit, __func__); brcms_down(wlc->wl); return; } /* increment second count */ wlc->pub->now++; /* delay radio disable */ if (wlc->mpc_delay_off) { if (--wlc->mpc_delay_off == 0) { mboolset(wlc->pub->radio_disabled, WL_RADIO_MPC_DISABLE); if (wlc->mpc && brcms_c_ismpc(wlc)) wlc->mpc_offcnt = 0; wlc->mpc_laston_ts = OSL_SYSUPTIME(); } } /* mpc sync */ brcms_c_radio_mpc_upd(wlc); /* radio sync: sw/hw/mpc --> radio_disable/radio_enable */ brcms_c_radio_hwdisable_upd(wlc); brcms_c_radio_upd(wlc); /* if radio is disable, driver may be down, quit here */ if (wlc->pub->radio_disabled) return; brcms_b_watchdog(wlc); /* occasionally sample mac stat counters to detect 16-bit counter wrap */ if ((wlc->pub->now % SW_TIMER_MAC_STAT_UPD) == 0) brcms_c_statsupd(wlc); /* Manage TKIP countermeasures timers */ FOREACH_BSS(wlc, i, cfg) { if (cfg->tk_cm_dt) { cfg->tk_cm_dt--; } if (cfg->tk_cm_bt) { cfg->tk_cm_bt--; } } /* Call any registered watchdog handlers */ for (i = 0; i < BRCMS_MAXMODULES; i++) { if (wlc->modulecb[i].watchdog_fn) wlc->modulecb[i].watchdog_fn(wlc->modulecb[i].hdl); } if (BRCMS_ISNPHY(wlc->band) && !wlc->pub->tempsense_disable && ((wlc->pub->now - wlc->tempsense_lasttime) >= BRCMS_TEMPSENSE_PERIOD)) { wlc->tempsense_lasttime = wlc->pub->now; brcms_c_tempsense_upd(wlc); } } /* make interface operational */ int brcms_c_up(struct brcms_c_info *wlc) { BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); /* HW is turned off so don't try to access it */ if (wlc->pub->hw_off || DEVICEREMOVED(wlc)) return -ENOMEDIUM; if (!wlc->pub->hw_up) { brcms_b_hw_up(wlc->hw); wlc->pub->hw_up = true; } if ((wlc->pub->boardflags & BFL_FEM) && (wlc->pub->sih->chip == BCM4313_CHIP_ID)) { if (wlc->pub->boardrev >= 0x1250 && (wlc->pub->boardflags & BFL_FEM_BT)) { brcms_c_mhf(wlc, MHF5, MHF5_4313_GPIOCTRL, MHF5_4313_GPIOCTRL, BRCM_BAND_ALL); } else { brcms_c_mhf(wlc, MHF4, MHF4_EXTPA_ENABLE, MHF4_EXTPA_ENABLE, BRCM_BAND_ALL); } } /* * Need to read the hwradio status here to cover the case where the system * is loaded with the hw radio disabled. We do not want to bring the driver up in this case. * if radio is disabled, abort up, lower power, start radio timer and return 0(for NDIS) * don't call radio_update to avoid looping brcms_c_up. * * brcms_b_up_prep() returns either 0 or -BCME_RADIOOFF only */ if (!wlc->pub->radio_disabled) { int status = brcms_b_up_prep(wlc->hw); if (status == -ENOMEDIUM) { if (!mboolisset (wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE)) { int idx; struct brcms_bss_cfg *bsscfg; mboolset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE); FOREACH_BSS(wlc, idx, bsscfg) { if (!BSSCFG_STA(bsscfg) || !bsscfg->enable || !bsscfg->BSS) continue; wiphy_err(wlc->wiphy, "wl%d.%d: up" ": rfdisable -> " "bsscfg_disable()\n", wlc->pub->unit, idx); } } } } if (wlc->pub->radio_disabled) { brcms_c_radio_monitor_start(wlc); return 0; } /* brcms_b_up_prep has done brcms_c_corereset(). so clk is on, set it */ wlc->clk = true; brcms_c_radio_monitor_stop(wlc); /* Set EDCF hostflags */ if (EDCF_ENAB(wlc->pub)) { brcms_c_mhf(wlc, MHF1, MHF1_EDCF, MHF1_EDCF, BRCM_BAND_ALL); } else { brcms_c_mhf(wlc, MHF1, MHF1_EDCF, 0, BRCM_BAND_ALL); } if (BRCMS_WAR16165(wlc)) brcms_c_mhf(wlc, MHF2, MHF2_PCISLOWCLKWAR, MHF2_PCISLOWCLKWAR, BRCM_BAND_ALL); brcms_init(wlc->wl); wlc->pub->up = true; if (wlc->bandinit_pending) { brcms_c_suspend_mac_and_wait(wlc); brcms_c_set_chanspec(wlc, wlc->default_bss->chanspec); wlc->bandinit_pending = false; brcms_c_enable_mac(wlc); } brcms_b_up_finish(wlc->hw); /* other software states up after ISR is running */ /* start APs that were to be brought up but are not up yet */ /* if (AP_ENAB(wlc->pub)) brcms_c_restart_ap(wlc->ap); */ /* Program the TX wme params with the current settings */ brcms_c_wme_retries_write(wlc); /* start one second watchdog timer */ brcms_add_timer(wlc->wl, wlc->wdtimer, TIMER_INTERVAL_WATCHDOG, true); wlc->WDarmed = true; /* ensure antenna config is up to date */ brcms_c_stf_phy_txant_upd(wlc); /* ensure LDPC config is in sync */ brcms_c_ht_update_ldpc(wlc, wlc->stf->ldpc); return 0; } /* Initialize the base precedence map for dequeueing from txq based on WME settings */ static void brcms_c_tx_prec_map_init(struct brcms_c_info *wlc) { wlc->tx_prec_map = BRCMS_PREC_BMP_ALL; memset(wlc->fifo2prec_map, 0, NFIFO * sizeof(u16)); /* For non-WME, both fifos have overlapping MAXPRIO. So just disable all precedences * if either is full. */ if (!EDCF_ENAB(wlc->pub)) { wlc->fifo2prec_map[TX_DATA_FIFO] = BRCMS_PREC_BMP_ALL; wlc->fifo2prec_map[TX_CTL_FIFO] = BRCMS_PREC_BMP_ALL; } else { wlc->fifo2prec_map[TX_AC_BK_FIFO] = BRCMS_PREC_BMP_AC_BK; wlc->fifo2prec_map[TX_AC_BE_FIFO] = BRCMS_PREC_BMP_AC_BE; wlc->fifo2prec_map[TX_AC_VI_FIFO] = BRCMS_PREC_BMP_AC_VI; wlc->fifo2prec_map[TX_AC_VO_FIFO] = BRCMS_PREC_BMP_AC_VO; } } static uint brcms_c_down_del_timer(struct brcms_c_info *wlc) { uint callbacks = 0; return callbacks; } /* * Mark the interface nonoperational, stop the software mechanisms, * disable the hardware, free any transient buffer state. * Return a count of the number of driver callbacks still pending. */ uint brcms_c_down(struct brcms_c_info *wlc) { uint callbacks = 0; int i; bool dev_gone = false; struct brcms_txq_info *qi; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); /* check if we are already in the going down path */ if (wlc->going_down) { wiphy_err(wlc->wiphy, "wl%d: %s: Driver going down so return" "\n", wlc->pub->unit, __func__); return 0; } if (!wlc->pub->up) return callbacks; /* in between, mpc could try to bring down again.. */ wlc->going_down = true; callbacks += brcms_b_bmac_down_prep(wlc->hw); dev_gone = DEVICEREMOVED(wlc); /* Call any registered down handlers */ for (i = 0; i < BRCMS_MAXMODULES; i++) { if (wlc->modulecb[i].down_fn) callbacks += wlc->modulecb[i].down_fn(wlc->modulecb[i].hdl); } /* cancel the watchdog timer */ if (wlc->WDarmed) { if (!brcms_del_timer(wlc->wl, wlc->wdtimer)) callbacks++; wlc->WDarmed = false; } /* cancel all other timers */ callbacks += brcms_c_down_del_timer(wlc); wlc->pub->up = false; wlc_phy_mute_upd(wlc->band->pi, false, PHY_MUTE_ALL); /* clear txq flow control */ brcms_c_txflowcontrol_reset(wlc); /* flush tx queues */ for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) { brcmu_pktq_flush(&qi->q, true, NULL, NULL); } callbacks += brcms_b_down_finish(wlc->hw); /* brcms_b_down_finish has done brcms_c_coredisable(). so clk is off */ wlc->clk = false; wlc->going_down = false; return callbacks; } /* Set the current gmode configuration */ int brcms_c_set_gmode(struct brcms_c_info *wlc, u8 gmode, bool config) { int ret = 0; uint i; wlc_rateset_t rs; /* Default to 54g Auto */ /* Advertise and use shortslot (-1/0/1 Auto/Off/On) */ s8 shortslot = BRCMS_SHORTSLOT_AUTO; bool shortslot_restrict = false; /* Restrict association to stations that support shortslot */ bool ofdm_basic = false; /* Make 6, 12, and 24 basic rates */ /* Advertise and use short preambles (-1/0/1 Auto/Off/On) */ int preamble = BRCMS_PLCP_LONG; bool preamble_restrict = false; /* Restrict association to stations that support short * preambles */ struct brcms_band *band; /* if N-support is enabled, allow Gmode set as long as requested * Gmode is not GMODE_LEGACY_B */ if (N_ENAB(wlc->pub) && gmode == GMODE_LEGACY_B) return -ENOTSUPP; /* verify that we are dealing with 2G band and grab the band pointer */ if (wlc->band->bandtype == BRCM_BAND_2G) band = wlc->band; else if ((NBANDS(wlc) > 1) && (wlc->bandstate[OTHERBANDUNIT(wlc)]->bandtype == BRCM_BAND_2G)) band = wlc->bandstate[OTHERBANDUNIT(wlc)]; else return -EINVAL; /* Legacy or bust when no OFDM is supported by regulatory */ if ((brcms_c_channel_locale_flags_in_band(wlc->cmi, band->bandunit) & BRCMS_NO_OFDM) && (gmode != GMODE_LEGACY_B)) return -EINVAL; /* update configuration value */ if (config == true) brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, gmode); /* Clear supported rates filter */ memset(&wlc->sup_rates_override, 0, sizeof(wlc_rateset_t)); /* Clear rateset override */ memset(&rs, 0, sizeof(wlc_rateset_t)); switch (gmode) { case GMODE_LEGACY_B: shortslot = BRCMS_SHORTSLOT_OFF; brcms_c_rateset_copy(&gphy_legacy_rates, &rs); break; case GMODE_LRS: if (AP_ENAB(wlc->pub)) brcms_c_rateset_copy(&cck_rates, &wlc->sup_rates_override); break; case GMODE_AUTO: /* Accept defaults */ break; case GMODE_ONLY: ofdm_basic = true; preamble = BRCMS_PLCP_SHORT; preamble_restrict = true; break; case GMODE_PERFORMANCE: if (AP_ENAB(wlc->pub)) /* Put all rates into the Supported Rates element */ brcms_c_rateset_copy(&cck_ofdm_rates, &wlc->sup_rates_override); shortslot = BRCMS_SHORTSLOT_ON; shortslot_restrict = true; ofdm_basic = true; preamble = BRCMS_PLCP_SHORT; preamble_restrict = true; break; default: /* Error */ wiphy_err(wlc->wiphy, "wl%d: %s: invalid gmode %d\n", wlc->pub->unit, __func__, gmode); return -ENOTSUPP; } /* * If we are switching to gmode == GMODE_LEGACY_B, * clean up rate info that may refer to OFDM rates. */ if ((gmode == GMODE_LEGACY_B) && (band->gmode != GMODE_LEGACY_B)) { band->gmode = gmode; if (band->rspec_override && !IS_CCK(band->rspec_override)) { band->rspec_override = 0; brcms_c_reprate_init(wlc); } if (band->mrspec_override && !IS_CCK(band->mrspec_override)) { band->mrspec_override = 0; } } band->gmode = gmode; wlc->shortslot_override = shortslot; if (AP_ENAB(wlc->pub)) { /* wlc->ap->shortslot_restrict = shortslot_restrict; */ wlc->PLCPHdr_override = (preamble != BRCMS_PLCP_LONG) ? BRCMS_PLCP_SHORT : BRCMS_PLCP_AUTO; } if ((AP_ENAB(wlc->pub) && preamble != BRCMS_PLCP_LONG) || preamble == BRCMS_PLCP_SHORT) wlc->default_bss->capability |= WLAN_CAPABILITY_SHORT_PREAMBLE; else wlc->default_bss->capability &= ~WLAN_CAPABILITY_SHORT_PREAMBLE; /* Update shortslot capability bit for AP and IBSS */ if ((AP_ENAB(wlc->pub) && shortslot == BRCMS_SHORTSLOT_AUTO) || shortslot == BRCMS_SHORTSLOT_ON) wlc->default_bss->capability |= WLAN_CAPABILITY_SHORT_SLOT_TIME; else wlc->default_bss->capability &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME; /* Use the default 11g rateset */ if (!rs.count) brcms_c_rateset_copy(&cck_ofdm_rates, &rs); if (ofdm_basic) { for (i = 0; i < rs.count; i++) { if (rs.rates[i] == BRCM_RATE_6M || rs.rates[i] == BRCM_RATE_12M || rs.rates[i] == BRCM_RATE_24M) rs.rates[i] |= BRCMS_RATE_FLAG; } } /* Set default bss rateset */ wlc->default_bss->rateset.count = rs.count; memcpy(wlc->default_bss->rateset.rates, rs.rates, sizeof(wlc->default_bss->rateset.rates)); return ret; } static int brcms_c_nmode_validate(struct brcms_c_info *wlc, s32 nmode) { int err = 0; switch (nmode) { case OFF: break; case AUTO: case WL_11N_2x2: case WL_11N_3x3: if (!(BRCMS_PHY_11N_CAP(wlc->band))) err = -EINVAL; break; default: err = -EINVAL; break; } return err; } int brcms_c_set_nmode(struct brcms_c_info *wlc, s32 nmode) { uint i; int err; err = brcms_c_nmode_validate(wlc, nmode); if (err) return err; switch (nmode) { case OFF: wlc->pub->_n_enab = OFF; wlc->default_bss->flags &= ~BRCMS_BSS_HT; /* delete the mcs rates from the default and hw ratesets */ brcms_c_rateset_mcs_clear(&wlc->default_bss->rateset); for (i = 0; i < NBANDS(wlc); i++) { memset(wlc->bandstate[i]->hw_rateset.mcs, 0, MCSSET_LEN); if (IS_MCS(wlc->band->rspec_override)) { wlc->bandstate[i]->rspec_override = 0; brcms_c_reprate_init(wlc); } if (IS_MCS(wlc->band->mrspec_override)) wlc->bandstate[i]->mrspec_override = 0; } break; case AUTO: if (wlc->stf->txstreams == WL_11N_3x3) nmode = WL_11N_3x3; else nmode = WL_11N_2x2; case WL_11N_2x2: case WL_11N_3x3: /* force GMODE_AUTO if NMODE is ON */ brcms_c_set_gmode(wlc, GMODE_AUTO, true); if (nmode == WL_11N_3x3) wlc->pub->_n_enab = SUPPORT_HT; else wlc->pub->_n_enab = SUPPORT_11N; wlc->default_bss->flags |= BRCMS_BSS_HT; /* add the mcs rates to the default and hw ratesets */ brcms_c_rateset_mcs_build(&wlc->default_bss->rateset, wlc->stf->txstreams); for (i = 0; i < NBANDS(wlc); i++) memcpy(wlc->bandstate[i]->hw_rateset.mcs, wlc->default_bss->rateset.mcs, MCSSET_LEN); break; default: break; } return err; } static int brcms_c_set_rateset(struct brcms_c_info *wlc, wlc_rateset_t *rs_arg) { wlc_rateset_t rs, new; uint bandunit; memcpy(&rs, rs_arg, sizeof(wlc_rateset_t)); /* check for bad count value */ if ((rs.count == 0) || (rs.count > BRCMS_NUMRATES)) return -EINVAL; /* try the current band */ bandunit = wlc->band->bandunit; memcpy(&new, &rs, sizeof(wlc_rateset_t)); if (brcms_c_rate_hwrs_filter_sort_validate (&new, &wlc->bandstate[bandunit]->hw_rateset, true, wlc->stf->txstreams)) goto good; /* try the other band */ if (IS_MBAND_UNLOCKED(wlc)) { bandunit = OTHERBANDUNIT(wlc); memcpy(&new, &rs, sizeof(wlc_rateset_t)); if (brcms_c_rate_hwrs_filter_sort_validate(&new, &wlc-> bandstate[bandunit]-> hw_rateset, true, wlc->stf->txstreams)) goto good; } return -EBADE; good: /* apply new rateset */ memcpy(&wlc->default_bss->rateset, &new, sizeof(wlc_rateset_t)); memcpy(&wlc->bandstate[bandunit]->defrateset, &new, sizeof(wlc_rateset_t)); return 0; } /* simplified integer set interface for common ioctl handler */ int brcms_c_set(struct brcms_c_info *wlc, int cmd, int arg) { return brcms_c_ioctl(wlc, cmd, (void *)&arg, sizeof(arg), NULL); } /* simplified integer get interface for common ioctl handler */ int brcms_c_get(struct brcms_c_info *wlc, int cmd, int *arg) { return brcms_c_ioctl(wlc, cmd, arg, sizeof(int), NULL); } static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc) { u8 r; bool war = false; if (wlc->cfg->associated) r = wlc->cfg->current_bss->rateset.rates[0]; else r = wlc->default_bss->rateset.rates[0]; wlc_phy_ofdm_rateset_war(wlc->band->pi, war); return; } int brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len, struct brcms_c_if *wlcif) { return _brcms_c_ioctl(wlc, cmd, arg, len, wlcif); } /* common ioctl handler. return: 0=ok, -1=error, positive=particular error */ static int _brcms_c_ioctl(struct brcms_c_info *wlc, int cmd, void *arg, int len, struct brcms_c_if *wlcif) { int val, *pval; bool bool_val; int bcmerror; struct scb *nextscb; bool ta_ok; uint band; struct brcms_bss_cfg *bsscfg; struct brcms_bss_info *current_bss; /* update bsscfg pointer */ bsscfg = wlc->cfg; current_bss = bsscfg->current_bss; /* initialize the following to get rid of compiler warning */ nextscb = NULL; ta_ok = false; band = 0; /* If the device is turned off, then it's not "removed" */ if (!wlc->pub->hw_off && DEVICEREMOVED(wlc)) { wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n", wlc->pub->unit, __func__); brcms_down(wlc->wl); return -EBADE; } /* default argument is generic integer */ pval = arg ? (int *)arg : NULL; /* This will prevent the misaligned access */ if (pval && (u32) len >= sizeof(val)) memcpy(&val, pval, sizeof(val)); else val = 0; /* bool conversion to avoid duplication below */ bool_val = val != 0; bcmerror = 0; if ((arg == NULL) || (len <= 0)) { wiphy_err(wlc->wiphy, "wl%d: %s: Command %d needs arguments\n", wlc->pub->unit, __func__, cmd); bcmerror = -EINVAL; goto done; } switch (cmd) { case BRCM_SET_CHANNEL:{ chanspec_t chspec = CH20MHZ_CHSPEC(val); if (val < 0 || val > MAXCHANNEL) { bcmerror = -EINVAL; break; } if (!brcms_c_valid_chanspec_db(wlc->cmi, chspec)) { bcmerror = -EINVAL; break; } if (!wlc->pub->up && IS_MBAND_UNLOCKED(wlc)) { if (wlc->band->bandunit != CHSPEC_BANDUNIT(chspec)) wlc->bandinit_pending = true; else wlc->bandinit_pending = false; } wlc->default_bss->chanspec = chspec; /* brcms_c_BSSinit() will sanitize the rateset before * using it.. */ if (wlc->pub->up && (BRCMS_BAND_PI_RADIO_CHANSPEC != chspec)) { brcms_c_set_home_chanspec(wlc, chspec); brcms_c_suspend_mac_and_wait(wlc); brcms_c_set_chanspec(wlc, chspec); brcms_c_enable_mac(wlc); } break; } case BRCM_SET_SRL: if (val >= 1 && val <= RETRY_SHORT_MAX) { int ac; wlc->SRL = (u16) val; brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL); for (ac = 0; ac < AC_COUNT; ac++) { BRCMS_WME_RETRY_SHORT_SET(wlc, ac, wlc->SRL); } brcms_c_wme_retries_write(wlc); } else bcmerror = -EINVAL; break; case BRCM_SET_LRL: if (val >= 1 && val <= 255) { int ac; wlc->LRL = (u16) val; brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL); for (ac = 0; ac < AC_COUNT; ac++) { BRCMS_WME_RETRY_LONG_SET(wlc, ac, wlc->LRL); } brcms_c_wme_retries_write(wlc); } else bcmerror = -EINVAL; break; case BRCM_GET_CURR_RATESET:{ wl_rateset_t *ret_rs = (wl_rateset_t *) arg; wlc_rateset_t *rs; if (wlc->pub->associated) rs = ¤t_bss->rateset; else rs = &wlc->default_bss->rateset; if (len < (int)(rs->count + sizeof(rs->count))) { bcmerror = -EOVERFLOW; break; } /* Copy only legacy rateset section */ ret_rs->count = rs->count; memcpy(&ret_rs->rates, &rs->rates, rs->count); break; } case BRCM_SET_RATESET:{ wlc_rateset_t rs; wl_rateset_t *in_rs = (wl_rateset_t *) arg; if (len < (int)(in_rs->count + sizeof(in_rs->count))) { bcmerror = -EOVERFLOW; break; } if (in_rs->count > BRCMS_NUMRATES) { bcmerror = -ENOBUFS; break; } memset(&rs, 0, sizeof(wlc_rateset_t)); /* Copy only legacy rateset section */ rs.count = in_rs->count; memcpy(&rs.rates, &in_rs->rates, rs.count); /* merge rateset coming in with the current mcsset */ if (N_ENAB(wlc->pub)) { if (bsscfg->associated) memcpy(rs.mcs, ¤t_bss->rateset.mcs[0], MCSSET_LEN); else memcpy(rs.mcs, &wlc->default_bss->rateset.mcs[0], MCSSET_LEN); } bcmerror = brcms_c_set_rateset(wlc, &rs); if (!bcmerror) brcms_c_ofdm_rateset_war(wlc); break; } case BRCM_SET_BCNPRD: /* range [1, 0xffff] */ if (val >= DOT11_MIN_BEACON_PERIOD && val <= DOT11_MAX_BEACON_PERIOD) wlc->default_bss->beacon_period = (u16) val; else bcmerror = -EINVAL; break; case BRCM_GET_PHYLIST: { unsigned char *cp = arg; if (len < 3) { bcmerror = -EOVERFLOW; break; } if (BRCMS_ISNPHY(wlc->band)) *cp++ = 'n'; else if (BRCMS_ISLCNPHY(wlc->band)) *cp++ = 'c'; else if (BRCMS_ISSSLPNPHY(wlc->band)) *cp++ = 's'; *cp = '\0'; break; } case BRCMS_SET_SHORTSLOT_OVERRIDE: if (val != BRCMS_SHORTSLOT_AUTO && val != BRCMS_SHORTSLOT_OFF && val != BRCMS_SHORTSLOT_ON) { bcmerror = -EINVAL; break; } wlc->shortslot_override = (s8) val; /* shortslot is an 11g feature, so no more work if we are * currently on the 5G band */ if (BAND_5G(wlc->band->bandtype)) break; if (wlc->pub->up && wlc->pub->associated) { /* let watchdog or beacon processing update shortslot */ } else if (wlc->pub->up) { /* unassociated shortslot is off */ brcms_c_switch_shortslot(wlc, false); } else { /* driver is down, so just update the brcms_c_info * value */ if (wlc->shortslot_override == BRCMS_SHORTSLOT_AUTO) { wlc->shortslot = false; } else { wlc->shortslot = (wlc->shortslot_override == BRCMS_SHORTSLOT_ON); } } break; } done: if (bcmerror) wlc->pub->bcmerror = bcmerror; return bcmerror; } /* * register watchdog and down handlers. */ int brcms_c_module_register(struct brcms_pub *pub, const char *name, void *hdl, watchdog_fn_t w_fn, down_fn_t d_fn) { struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc; int i; /* find an empty entry and just add, no duplication check! */ for (i = 0; i < BRCMS_MAXMODULES; i++) { if (wlc->modulecb[i].name[0] == '\0') { strncpy(wlc->modulecb[i].name, name, sizeof(wlc->modulecb[i].name) - 1); wlc->modulecb[i].hdl = hdl; wlc->modulecb[i].watchdog_fn = w_fn; wlc->modulecb[i].down_fn = d_fn; return 0; } } return -ENOSR; } /* unregister module callbacks */ int brcms_c_module_unregister(struct brcms_pub *pub, const char *name, void *hdl) { struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc; int i; if (wlc == NULL) return -ENODATA; for (i = 0; i < BRCMS_MAXMODULES; i++) { if (!strcmp(wlc->modulecb[i].name, name) && (wlc->modulecb[i].hdl == hdl)) { memset(&wlc->modulecb[i], 0, sizeof(struct modulecb)); return 0; } } /* table not found! */ return -ENODATA; } /* Write WME tunable parameters for retransmit/max rate from wlc struct to ucode */ static void brcms_c_wme_retries_write(struct brcms_c_info *wlc) { int ac; /* Need clock to do this */ if (!wlc->clk) return; for (ac = 0; ac < AC_COUNT; ac++) { brcms_c_write_shm(wlc, M_AC_TXLMT_ADDR(ac), wlc->wme_retries[ac]); } } #ifdef BCMDBG static const char * const supr_reason[] = { "None", "PMQ Entry", "Flush request", "Previous frag failure", "Channel mismatch", "Lifetime Expiry", "Underflow" }; static void brcms_c_print_txs_status(u16 s) { printk(KERN_DEBUG "[15:12] %d frame attempts\n", (s & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT); printk(KERN_DEBUG " [11:8] %d rts attempts\n", (s & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT); printk(KERN_DEBUG " [7] %d PM mode indicated\n", ((s & TX_STATUS_PMINDCTD) ? 1 : 0)); printk(KERN_DEBUG " [6] %d intermediate status\n", ((s & TX_STATUS_INTERMEDIATE) ? 1 : 0)); printk(KERN_DEBUG " [5] %d AMPDU\n", (s & TX_STATUS_AMPDU) ? 1 : 0); printk(KERN_DEBUG " [4:2] %d Frame Suppressed Reason (%s)\n", ((s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT), supr_reason[(s & TX_STATUS_SUPR_MASK) >> TX_STATUS_SUPR_SHIFT]); printk(KERN_DEBUG " [1] %d acked\n", ((s & TX_STATUS_ACK_RCV) ? 1 : 0)); } #endif /* BCMDBG */ void brcms_c_print_txstatus(struct tx_status *txs) { #if defined(BCMDBG) u16 s = txs->status; u16 ackphyrxsh = txs->ackphyrxsh; printk(KERN_DEBUG "\ntxpkt (MPDU) Complete\n"); printk(KERN_DEBUG "FrameID: %04x ", txs->frameid); printk(KERN_DEBUG "TxStatus: %04x", s); printk(KERN_DEBUG "\n"); brcms_c_print_txs_status(s); printk(KERN_DEBUG "LastTxTime: %04x ", txs->lasttxtime); printk(KERN_DEBUG "Seq: %04x ", txs->sequence); printk(KERN_DEBUG "PHYTxStatus: %04x ", txs->phyerr); printk(KERN_DEBUG "RxAckRSSI: %04x ", (ackphyrxsh & PRXS1_JSSI_MASK) >> PRXS1_JSSI_SHIFT); printk(KERN_DEBUG "RxAckSQ: %04x", (ackphyrxsh & PRXS1_SQ_MASK) >> PRXS1_SQ_SHIFT); printk(KERN_DEBUG "\n"); #endif /* defined(BCMDBG) */ } void brcms_c_statsupd(struct brcms_c_info *wlc) { int i; struct macstat macstats; #ifdef BCMDBG u16 delta; u16 rxf0ovfl; u16 txfunfl[NFIFO]; #endif /* BCMDBG */ /* if driver down, make no sense to update stats */ if (!wlc->pub->up) return; #ifdef BCMDBG /* save last rx fifo 0 overflow count */ rxf0ovfl = wlc->core->macstat_snapshot->rxf0ovfl; /* save last tx fifo underflow count */ for (i = 0; i < NFIFO; i++) txfunfl[i] = wlc->core->macstat_snapshot->txfunfl[i]; #endif /* BCMDBG */ /* Read mac stats from contiguous shared memory */ brcms_b_copyfrom_shm(wlc->hw, M_UCODE_MACSTAT, &macstats, sizeof(struct macstat)); #ifdef BCMDBG /* check for rx fifo 0 overflow */ delta = (u16) (wlc->core->macstat_snapshot->rxf0ovfl - rxf0ovfl); if (delta) wiphy_err(wlc->wiphy, "wl%d: %u rx fifo 0 overflows!\n", wlc->pub->unit, delta); /* check for tx fifo underflows */ for (i = 0; i < NFIFO; i++) { delta = (u16) (wlc->core->macstat_snapshot->txfunfl[i] - txfunfl[i]); if (delta) wiphy_err(wlc->wiphy, "wl%d: %u tx fifo %d underflows!" "\n", wlc->pub->unit, delta, i); } #endif /* BCMDBG */ /* merge counters from dma module */ for (i = 0; i < NFIFO; i++) { if (wlc->hw->di[i]) { dma_counterreset(wlc->hw->di[i]); } } } bool brcms_c_chipmatch(u16 vendor, u16 device) { if (vendor != PCI_VENDOR_ID_BROADCOM) { pr_err("chipmatch: unknown vendor id %04x\n", vendor); return false; } if (device == BCM43224_D11N_ID_VEN1) return true; if ((device == BCM43224_D11N_ID) || (device == BCM43225_D11N2G_ID)) return true; if (device == BCM4313_D11N2G_ID) return true; if ((device == BCM43236_D11N_ID) || (device == BCM43236_D11N2G_ID)) return true; pr_err("chipmatch: unknown device id %04x\n", device); return false; } #if defined(BCMDBG) void brcms_c_print_txdesc(struct d11txh *txh) { u16 mtcl = le16_to_cpu(txh->MacTxControlLow); u16 mtch = le16_to_cpu(txh->MacTxControlHigh); u16 mfc = le16_to_cpu(txh->MacFrameControl); u16 tfest = le16_to_cpu(txh->TxFesTimeNormal); u16 ptcw = le16_to_cpu(txh->PhyTxControlWord); u16 ptcw_1 = le16_to_cpu(txh->PhyTxControlWord_1); u16 ptcw_1_Fbr = le16_to_cpu(txh->PhyTxControlWord_1_Fbr); u16 ptcw_1_Rts = le16_to_cpu(txh->PhyTxControlWord_1_Rts); u16 ptcw_1_FbrRts = le16_to_cpu(txh->PhyTxControlWord_1_FbrRts); u16 mainrates = le16_to_cpu(txh->MainRates); u16 xtraft = le16_to_cpu(txh->XtraFrameTypes); u8 *iv = txh->IV; u8 *ra = txh->TxFrameRA; u16 tfestfb = le16_to_cpu(txh->TxFesTimeFallback); u8 *rtspfb = txh->RTSPLCPFallback; u16 rtsdfb = le16_to_cpu(txh->RTSDurFallback); u8 *fragpfb = txh->FragPLCPFallback; u16 fragdfb = le16_to_cpu(txh->FragDurFallback); u16 mmodelen = le16_to_cpu(txh->MModeLen); u16 mmodefbrlen = le16_to_cpu(txh->MModeFbrLen); u16 tfid = le16_to_cpu(txh->TxFrameID); u16 txs = le16_to_cpu(txh->TxStatus); u16 mnmpdu = le16_to_cpu(txh->MaxNMpdus); u16 mabyte = le16_to_cpu(txh->MaxABytes_MRT); u16 mabyte_f = le16_to_cpu(txh->MaxABytes_FBR); u16 mmbyte = le16_to_cpu(txh->MinMBytes); u8 *rtsph = txh->RTSPhyHeader; struct ieee80211_rts rts = txh->rts_frame; char hexbuf[256]; /* add plcp header along with txh descriptor */ printk(KERN_DEBUG "Raw TxDesc + plcp header:\n"); print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, txh, sizeof(struct d11txh) + 48); printk(KERN_DEBUG "TxCtlLow: %04x ", mtcl); printk(KERN_DEBUG "TxCtlHigh: %04x ", mtch); printk(KERN_DEBUG "FC: %04x ", mfc); printk(KERN_DEBUG "FES Time: %04x\n", tfest); printk(KERN_DEBUG "PhyCtl: %04x%s ", ptcw, (ptcw & PHY_TXC_SHORT_HDR) ? " short" : ""); printk(KERN_DEBUG "PhyCtl_1: %04x ", ptcw_1); printk(KERN_DEBUG "PhyCtl_1_Fbr: %04x\n", ptcw_1_Fbr); printk(KERN_DEBUG "PhyCtl_1_Rts: %04x ", ptcw_1_Rts); printk(KERN_DEBUG "PhyCtl_1_Fbr_Rts: %04x\n", ptcw_1_FbrRts); printk(KERN_DEBUG "MainRates: %04x ", mainrates); printk(KERN_DEBUG "XtraFrameTypes: %04x ", xtraft); printk(KERN_DEBUG "\n"); brcmu_format_hex(hexbuf, iv, sizeof(txh->IV)); printk(KERN_DEBUG "SecIV: %s\n", hexbuf); brcmu_format_hex(hexbuf, ra, sizeof(txh->TxFrameRA)); printk(KERN_DEBUG "RA: %s\n", hexbuf); printk(KERN_DEBUG "Fb FES Time: %04x ", tfestfb); brcmu_format_hex(hexbuf, rtspfb, sizeof(txh->RTSPLCPFallback)); printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf); printk(KERN_DEBUG "RTS DUR: %04x ", rtsdfb); brcmu_format_hex(hexbuf, fragpfb, sizeof(txh->FragPLCPFallback)); printk(KERN_DEBUG "PLCP: %s ", hexbuf); printk(KERN_DEBUG "DUR: %04x", fragdfb); printk(KERN_DEBUG "\n"); printk(KERN_DEBUG "MModeLen: %04x ", mmodelen); printk(KERN_DEBUG "MModeFbrLen: %04x\n", mmodefbrlen); printk(KERN_DEBUG "FrameID: %04x\n", tfid); printk(KERN_DEBUG "TxStatus: %04x\n", txs); printk(KERN_DEBUG "MaxNumMpdu: %04x\n", mnmpdu); printk(KERN_DEBUG "MaxAggbyte: %04x\n", mabyte); printk(KERN_DEBUG "MaxAggbyte_fb: %04x\n", mabyte_f); printk(KERN_DEBUG "MinByte: %04x\n", mmbyte); brcmu_format_hex(hexbuf, rtsph, sizeof(txh->RTSPhyHeader)); printk(KERN_DEBUG "RTS PLCP: %s ", hexbuf); brcmu_format_hex(hexbuf, (u8 *) &rts, sizeof(txh->rts_frame)); printk(KERN_DEBUG "RTS Frame: %s", hexbuf); printk(KERN_DEBUG "\n"); } #endif /* defined(BCMDBG) */ #if defined(BCMDBG) void brcms_c_print_rxh(struct d11rxhdr *rxh) { u16 len = rxh->RxFrameSize; u16 phystatus_0 = rxh->PhyRxStatus_0; u16 phystatus_1 = rxh->PhyRxStatus_1; u16 phystatus_2 = rxh->PhyRxStatus_2; u16 phystatus_3 = rxh->PhyRxStatus_3; u16 macstatus1 = rxh->RxStatus1; u16 macstatus2 = rxh->RxStatus2; char flagstr[64]; char lenbuf[20]; static const struct brcmu_bit_desc macstat_flags[] = { {RXS_FCSERR, "FCSErr"}, {RXS_RESPFRAMETX, "Reply"}, {RXS_PBPRES, "PADDING"}, {RXS_DECATMPT, "DeCr"}, {RXS_DECERR, "DeCrErr"}, {RXS_BCNSENT, "Bcn"}, {0, NULL} }; printk(KERN_DEBUG "Raw RxDesc:\n"); print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, rxh, sizeof(struct d11rxhdr)); brcmu_format_flags(macstat_flags, macstatus1, flagstr, 64); snprintf(lenbuf, sizeof(lenbuf), "0x%x", len); printk(KERN_DEBUG "RxFrameSize: %6s (%d)%s\n", lenbuf, len, (rxh->PhyRxStatus_0 & PRXS0_SHORTH) ? " short preamble" : ""); printk(KERN_DEBUG "RxPHYStatus: %04x %04x %04x %04x\n", phystatus_0, phystatus_1, phystatus_2, phystatus_3); printk(KERN_DEBUG "RxMACStatus: %x %s\n", macstatus1, flagstr); printk(KERN_DEBUG "RXMACaggtype: %x\n", (macstatus2 & RXS_AGGTYPE_MASK)); printk(KERN_DEBUG "RxTSFTime: %04x\n", rxh->RxTSFTime); } #endif /* defined(BCMDBG) */ static u16 brcms_c_rate_shm_offset(struct brcms_c_info *wlc, u8 rate) { return brcms_b_rate_shm_offset(wlc->hw, rate); } /* Callback for device removed */ /* * Attempts to queue a packet onto a multiple-precedence queue, * if necessary evicting a lower precedence packet from the queue. * * 'prec' is the precedence number that has already been mapped * from the packet priority. * * Returns true if packet consumed (queued), false if not. */ bool brcms_c_prec_enq(struct brcms_c_info *wlc, struct pktq *q, void *pkt, int prec) { return brcms_c_prec_enq_head(wlc, q, pkt, prec, false); } bool brcms_c_prec_enq_head(struct brcms_c_info *wlc, struct pktq *q, struct sk_buff *pkt, int prec, bool head) { struct sk_buff *p; int eprec = -1; /* precedence to evict from */ /* Determine precedence from which to evict packet, if any */ if (pktq_pfull(q, prec)) eprec = prec; else if (pktq_full(q)) { p = brcmu_pktq_peek_tail(q, &eprec); if (eprec > prec) { wiphy_err(wlc->wiphy, "%s: Failing: eprec %d > prec %d" "\n", __func__, eprec, prec); return false; } } /* Evict if needed */ if (eprec >= 0) { bool discard_oldest; discard_oldest = AC_BITMAP_TST(wlc->wme_dp, eprec); /* Refuse newer packet unless configured to discard oldest */ if (eprec == prec && !discard_oldest) { wiphy_err(wlc->wiphy, "%s: No where to go, prec == %d" "\n", __func__, prec); return false; } /* Evict packet according to discard policy */ p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) : brcmu_pktq_pdeq_tail(q, eprec); brcmu_pkt_buf_free_skb(p); } /* Enqueue */ if (head) p = brcmu_pktq_penq_head(q, prec, pkt); else p = brcmu_pktq_penq(q, prec, pkt); return true; } void brcms_c_txq_enq(void *ctx, struct scb *scb, struct sk_buff *sdu, uint prec) { struct brcms_c_info *wlc = (struct brcms_c_info *) ctx; struct brcms_txq_info *qi = wlc->pkt_queue; /* Check me */ struct pktq *q = &qi->q; int prio; prio = sdu->priority; if (!brcms_c_prec_enq(wlc, q, sdu, prec)) { if (!EDCF_ENAB(wlc->pub) || (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL)) wiphy_err(wlc->wiphy, "wl%d: txq_enq: txq overflow" "\n", wlc->pub->unit); /* * we might hit this condtion in case * packet flooding from mac80211 stack */ brcmu_pkt_buf_free_skb(sdu); } /* Check if flow control needs to be turned on after enqueuing the packet * Don't turn on flow control if EDCF is enabled. Driver would make the decision on what * to drop instead of relying on stack to make the right decision */ if (!EDCF_ENAB(wlc->pub) || (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL)) { if (pktq_len(q) >= wlc->pub->tunables->datahiwat) { brcms_c_txflowcontrol(wlc, qi, ON, ALLPRIO); } } else if (wlc->pub->_priofc) { if (pktq_plen(q, wlc_prio2prec_map[prio]) >= wlc->pub->tunables->datahiwat) { brcms_c_txflowcontrol(wlc, qi, ON, prio); } } } bool brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu, struct ieee80211_hw *hw) { u8 prio; uint fifo; void *pkt; struct scb *scb = &global_scb; struct ieee80211_hdr *d11_header = (struct ieee80211_hdr *)(sdu->data); /* 802.11 standard requires management traffic to go at highest priority */ prio = ieee80211_is_data(d11_header->frame_control) ? sdu->priority : MAXPRIO; fifo = prio2fifo[prio]; pkt = sdu; if (unlikely (brcms_c_d11hdrs_mac80211( wlc, hw, pkt, scb, 0, 1, fifo, 0, NULL, 0))) return -EINVAL; brcms_c_txq_enq(wlc, scb, pkt, BRCMS_PRIO_TO_PREC(prio)); brcms_c_send_q(wlc); return 0; } void brcms_c_send_q(struct brcms_c_info *wlc) { struct sk_buff *pkt[DOT11_MAXNUMFRAGS]; int prec; u16 prec_map; int err = 0, i, count; uint fifo; struct brcms_txq_info *qi = wlc->pkt_queue; struct pktq *q = &qi->q; struct ieee80211_tx_info *tx_info; if (in_send_q) return; else in_send_q = true; prec_map = wlc->tx_prec_map; /* Send all the enq'd pkts that we can. * Dequeue packets with precedence with empty HW fifo only */ while (prec_map && (pkt[0] = brcmu_pktq_mdeq(q, prec_map, &prec))) { tx_info = IEEE80211_SKB_CB(pkt[0]); if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { err = brcms_c_sendampdu(wlc->ampdu, qi, pkt, prec); } else { count = 1; err = brcms_c_prep_pdu(wlc, pkt[0], &fifo); if (!err) { for (i = 0; i < count; i++) { brcms_c_txfifo(wlc, fifo, pkt[i], true, 1); } } } if (err == -EBUSY) { brcmu_pktq_penq_head(q, prec, pkt[0]); /* If send failed due to any other reason than a change in * HW FIFO condition, quit. Otherwise, read the new prec_map! */ if (prec_map == wlc->tx_prec_map) break; prec_map = wlc->tx_prec_map; } } /* Check if flow control needs to be turned off after sending the packet */ if (!EDCF_ENAB(wlc->pub) || (wlc->pub->wlfeatureflag & WL_SWFL_FLOWCONTROL)) { if (brcms_c_txflowcontrol_prio_isset(wlc, qi, ALLPRIO) && (pktq_len(q) < wlc->pub->tunables->datahiwat / 2)) { brcms_c_txflowcontrol(wlc, qi, OFF, ALLPRIO); } } else if (wlc->pub->_priofc) { int prio; for (prio = MAXPRIO; prio >= 0; prio--) { if (brcms_c_txflowcontrol_prio_isset(wlc, qi, prio) && (pktq_plen(q, wlc_prio2prec_map[prio]) < wlc->pub->tunables->datahiwat / 2)) { brcms_c_txflowcontrol(wlc, qi, OFF, prio); } } } in_send_q = false; } /* * bcmc_fid_generate: * Generate frame ID for a BCMC packet. The frag field is not used * for MC frames so is used as part of the sequence number. */ static inline u16 bcmc_fid_generate(struct brcms_c_info *wlc, struct brcms_bss_cfg *bsscfg, struct d11txh *txh) { u16 frameid; frameid = le16_to_cpu(txh->TxFrameID) & ~(TXFID_SEQ_MASK | TXFID_QUEUE_MASK); frameid |= (((wlc-> mc_fid_counter++) << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) | TX_BCMC_FIFO; return frameid; } void brcms_c_txfifo(struct brcms_c_info *wlc, uint fifo, struct sk_buff *p, bool commit, s8 txpktpend) { u16 frameid = INVALIDFID; struct d11txh *txh; txh = (struct d11txh *) (p->data); /* When a BC/MC frame is being committed to the BCMC fifo via DMA (NOT PIO), update * ucode or BSS info as appropriate. */ if (fifo == TX_BCMC_FIFO) { frameid = le16_to_cpu(txh->TxFrameID); } if (BRCMS_WAR16165(wlc)) brcms_c_war16165(wlc, true); /* Bump up pending count for if not using rpc. If rpc is used, this will be handled * in brcms_b_txfifo() */ if (commit) { TXPKTPENDINC(wlc, fifo, txpktpend); BCMMSG(wlc->wiphy, "pktpend inc %d to %d\n", txpktpend, TXPKTPENDGET(wlc, fifo)); } /* Commit BCMC sequence number in the SHM frame ID location */ if (frameid != INVALIDFID) BCMCFID(wlc, frameid); if (dma_txfast(wlc->hw->di[fifo], p, commit) < 0) { wiphy_err(wlc->wiphy, "txfifo: fatal, toss frames !!!\n"); } } void brcms_c_compute_plcp(struct brcms_c_info *wlc, ratespec_t rspec, uint length, u8 *plcp) { if (IS_MCS(rspec)) { brcms_c_compute_mimo_plcp(rspec, length, plcp); } else if (IS_OFDM(rspec)) { brcms_c_compute_ofdm_plcp(rspec, length, plcp); } else { brcms_c_compute_cck_plcp(wlc, rspec, length, plcp); } return; } /* Rate: 802.11 rate code, length: PSDU length in octets */ static void brcms_c_compute_mimo_plcp(ratespec_t rspec, uint length, u8 *plcp) { u8 mcs = (u8) (rspec & RSPEC_RATE_MASK); plcp[0] = mcs; if (RSPEC_IS40MHZ(rspec) || (mcs == 32)) plcp[0] |= MIMO_PLCP_40MHZ; BRCMS_SET_MIMO_PLCP_LEN(plcp, length); plcp[3] = RSPEC_MIMOPLCP3(rspec); /* rspec already holds this byte */ plcp[3] |= 0x7; /* set smoothing, not sounding ppdu & reserved */ plcp[4] = 0; /* number of extension spatial streams bit 0 & 1 */ plcp[5] = 0; } /* Rate: 802.11 rate code, length: PSDU length in octets */ static void brcms_c_compute_ofdm_plcp(ratespec_t rspec, u32 length, u8 *plcp) { u8 rate_signal; u32 tmp = 0; int rate = RSPEC2RATE(rspec); /* encode rate per 802.11a-1999 sec 17.3.4.1, with lsb transmitted first */ rate_signal = rate_info[rate] & BRCMS_RATE_MASK; memset(plcp, 0, D11_PHY_HDR_LEN); D11A_PHY_HDR_SRATE((struct ofdm_phy_hdr *) plcp, rate_signal); tmp = (length & 0xfff) << 5; plcp[2] |= (tmp >> 16) & 0xff; plcp[1] |= (tmp >> 8) & 0xff; plcp[0] |= tmp & 0xff; return; } /* * Compute PLCP, but only requires actual rate and length of pkt. * Rate is given in the driver standard multiple of 500 kbps. * le is set for 11 Mbps rate if necessary. * Broken out for PRQ. */ static void brcms_c_cck_plcp_set(struct brcms_c_info *wlc, int rate_500, uint length, u8 *plcp) { u16 usec = 0; u8 le = 0; switch (rate_500) { case BRCM_RATE_1M: usec = length << 3; break; case BRCM_RATE_2M: usec = length << 2; break; case BRCM_RATE_5M5: usec = (length << 4) / 11; if ((length << 4) - (usec * 11) > 0) usec++; break; case BRCM_RATE_11M: usec = (length << 3) / 11; if ((length << 3) - (usec * 11) > 0) { usec++; if ((usec * 11) - (length << 3) >= 8) le = D11B_PLCP_SIGNAL_LE; } break; default: wiphy_err(wlc->wiphy, "brcms_c_cck_plcp_set: unsupported rate %d" "\n", rate_500); rate_500 = BRCM_RATE_1M; usec = length << 3; break; } /* PLCP signal byte */ plcp[0] = rate_500 * 5; /* r (500kbps) * 5 == r (100kbps) */ /* PLCP service byte */ plcp[1] = (u8) (le | D11B_PLCP_SIGNAL_LOCKED); /* PLCP length u16, little endian */ plcp[2] = usec & 0xff; plcp[3] = (usec >> 8) & 0xff; /* PLCP CRC16 */ plcp[4] = 0; plcp[5] = 0; } /* Rate: 802.11 rate code, length: PSDU length in octets */ static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, ratespec_t rspec, uint length, u8 *plcp) { int rate = RSPEC2RATE(rspec); brcms_c_cck_plcp_set(wlc, rate, length, plcp); } /* brcms_c_compute_frame_dur() * * Calculate the 802.11 MAC header DUR field for MPDU * DUR for a single frame = 1 SIFS + 1 ACK * DUR for a frame with following frags = 3 SIFS + 2 ACK + next frag time * * rate MPDU rate in unit of 500kbps * next_frag_len next MPDU length in bytes * preamble_type use short/GF or long/MM PLCP header */ static u16 brcms_c_compute_frame_dur(struct brcms_c_info *wlc, ratespec_t rate, u8 preamble_type, uint next_frag_len) { u16 dur, sifs; sifs = SIFS(wlc->band); dur = sifs; dur += (u16) brcms_c_calc_ack_time(wlc, rate, preamble_type); if (next_frag_len) { /* Double the current DUR to get 2 SIFS + 2 ACKs */ dur *= 2; /* add another SIFS and the frag time */ dur += sifs; dur += (u16) brcms_c_calc_frame_time(wlc, rate, preamble_type, next_frag_len); } return dur; } /* brcms_c_compute_rtscts_dur() * * Calculate the 802.11 MAC header DUR field for an RTS or CTS frame * DUR for normal RTS/CTS w/ frame = 3 SIFS + 1 CTS + next frame time + 1 ACK * DUR for CTS-TO-SELF w/ frame = 2 SIFS + next frame time + 1 ACK * * cts cts-to-self or rts/cts * rts_rate rts or cts rate in unit of 500kbps * rate next MPDU rate in unit of 500kbps * frame_len next MPDU frame length in bytes */ u16 brcms_c_compute_rtscts_dur(struct brcms_c_info *wlc, bool cts_only, ratespec_t rts_rate, ratespec_t frame_rate, u8 rts_preamble_type, u8 frame_preamble_type, uint frame_len, bool ba) { u16 dur, sifs; sifs = SIFS(wlc->band); if (!cts_only) { /* RTS/CTS */ dur = 3 * sifs; dur += (u16) brcms_c_calc_cts_time(wlc, rts_rate, rts_preamble_type); } else { /* CTS-TO-SELF */ dur = 2 * sifs; } dur += (u16) brcms_c_calc_frame_time(wlc, frame_rate, frame_preamble_type, frame_len); if (ba) dur += (u16) brcms_c_calc_ba_time(wlc, frame_rate, BRCMS_SHORT_PREAMBLE); else dur += (u16) brcms_c_calc_ack_time(wlc, frame_rate, frame_preamble_type); return dur; } u16 brcms_c_phytxctl1_calc(struct brcms_c_info *wlc, ratespec_t rspec) { u16 phyctl1 = 0; u16 bw; if (BRCMS_ISLCNPHY(wlc->band)) { bw = PHY_TXC1_BW_20MHZ; } else { bw = RSPEC_GET_BW(rspec); /* 10Mhz is not supported yet */ if (bw < PHY_TXC1_BW_20MHZ) { wiphy_err(wlc->wiphy, "phytxctl1_calc: bw %d is " "not supported yet, set to 20L\n", bw); bw = PHY_TXC1_BW_20MHZ; } } if (IS_MCS(rspec)) { uint mcs = rspec & RSPEC_RATE_MASK; /* bw, stf, coding-type is part of RSPEC_PHYTXBYTE2 returns */ phyctl1 = RSPEC_PHYTXBYTE2(rspec); /* set the upper byte of phyctl1 */ phyctl1 |= (mcs_table[mcs].tx_phy_ctl3 << 8); } else if (IS_CCK(rspec) && !BRCMS_ISLCNPHY(wlc->band) && !BRCMS_ISSSLPNPHY(wlc->band)) { /* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */ /* Eventually MIMOPHY would also be converted to this format */ /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */ phyctl1 = (bw | (RSPEC_STF(rspec) << PHY_TXC1_MODE_SHIFT)); } else { /* legacy OFDM/CCK */ s16 phycfg; /* get the phyctl byte from rate phycfg table */ phycfg = brcms_c_rate_legacy_phyctl(RSPEC2RATE(rspec)); if (phycfg == -1) { wiphy_err(wlc->wiphy, "phytxctl1_calc: wrong " "legacy OFDM/CCK rate\n"); phycfg = 0; } /* set the upper byte of phyctl1 */ phyctl1 = (bw | (phycfg << 8) | (RSPEC_STF(rspec) << PHY_TXC1_MODE_SHIFT)); } return phyctl1; } ratespec_t brcms_c_rspec_to_rts_rspec(struct brcms_c_info *wlc, ratespec_t rspec, bool use_rspec, u16 mimo_ctlchbw) { ratespec_t rts_rspec = 0; if (use_rspec) { /* use frame rate as rts rate */ rts_rspec = rspec; } else if (wlc->band->gmode && wlc->protection->_g && !IS_CCK(rspec)) { /* Use 11Mbps as the g protection RTS target rate and fallback. * Use the BRCMS_BASIC_RATE() lookup to find the best basic rate * under the target in case 11 Mbps is not Basic. * 6 and 9 Mbps are not usually selected by rate selection, but even * if the OFDM rate we are protecting is 6 or 9 Mbps, 11 is more robust. */ rts_rspec = BRCMS_BASIC_RATE(wlc, BRCM_RATE_11M); } else { /* calculate RTS rate and fallback rate based on the frame rate * RTS must be sent at a basic rate since it is a * control frame, sec 9.6 of 802.11 spec */ rts_rspec = BRCMS_BASIC_RATE(wlc, rspec); } if (BRCMS_PHY_11N_CAP(wlc->band)) { /* set rts txbw to correct side band */ rts_rspec &= ~RSPEC_BW_MASK; /* if rspec/rspec_fallback is 40MHz, then send RTS on both 20MHz channel * (DUP), otherwise send RTS on control channel */ if (RSPEC_IS40MHZ(rspec) && !IS_CCK(rts_rspec)) rts_rspec |= (PHY_TXC1_BW_40MHZ_DUP << RSPEC_BW_SHIFT); else rts_rspec |= (mimo_ctlchbw << RSPEC_BW_SHIFT); /* pick siso/cdd as default for ofdm */ if (IS_OFDM(rts_rspec)) { rts_rspec &= ~RSPEC_STF_MASK; rts_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT); } } return rts_rspec; } /* * Add struct d11txh, struct cck_phy_hdr. * * 'p' data must start with 802.11 MAC header * 'p' must allow enough bytes of local headers to be "pushed" onto the packet * * headroom == D11_PHY_HDR_LEN + D11_TXH_LEN (D11_TXH_LEN is now 104 bytes) * */ static u16 brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc, struct ieee80211_hw *hw, struct sk_buff *p, struct scb *scb, uint frag, uint nfrags, uint queue, uint next_frag_len, struct wsec_key *key, ratespec_t rspec_override) { struct ieee80211_hdr *h; struct d11txh *txh; u8 *plcp, plcp_fallback[D11_PHY_HDR_LEN]; int len, phylen, rts_phylen; u16 mch, phyctl, xfts, mainrates; u16 seq = 0, mcl = 0, status = 0, frameid = 0; ratespec_t rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M }, rts_rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M}; bool use_rts = false; bool use_cts = false; bool use_rifs = false; bool short_preamble[2] = { false, false }; u8 preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE }; u8 rts_preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE }; u8 *rts_plcp, rts_plcp_fallback[D11_PHY_HDR_LEN]; struct ieee80211_rts *rts = NULL; bool qos; uint ac; u32 rate_val[2]; bool hwtkmic = false; u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ; #define ANTCFG_NONE 0xFF u8 antcfg = ANTCFG_NONE; u8 fbantcfg = ANTCFG_NONE; uint phyctl1_stf = 0; u16 durid = 0; struct ieee80211_tx_rate *txrate[2]; int k; struct ieee80211_tx_info *tx_info; bool is_mcs[2]; u16 mimo_txbw; u8 mimo_preamble_type; /* locate 802.11 MAC header */ h = (struct ieee80211_hdr *)(p->data); qos = ieee80211_is_data_qos(h->frame_control); /* compute length of frame in bytes for use in PLCP computations */ len = brcmu_pkttotlen(p); phylen = len + FCS_LEN; /* If WEP enabled, add room in phylen for the additional bytes of * ICV which MAC generates. We do NOT add the additional bytes to * the packet itself, thus phylen = packet length + ICV_LEN + FCS_LEN * in this case */ if (key) { phylen += key->icv_len; } /* Get tx_info */ tx_info = IEEE80211_SKB_CB(p); /* add PLCP */ plcp = skb_push(p, D11_PHY_HDR_LEN); /* add Broadcom tx descriptor header */ txh = (struct d11txh *) skb_push(p, D11_TXH_LEN); memset(txh, 0, D11_TXH_LEN); /* setup frameid */ if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { /* non-AP STA should never use BCMC queue */ if (queue == TX_BCMC_FIFO) { wiphy_err(wlc->wiphy, "wl%d: %s: ASSERT queue == " "TX_BCMC!\n", BRCMS_UNIT(wlc), __func__); frameid = bcmc_fid_generate(wlc, NULL, txh); } else { /* Increment the counter for first fragment */ if (tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) { SCB_SEQNUM(scb, p->priority)++; } /* extract fragment number from frame first */ seq = le16_to_cpu(seq) & FRAGNUM_MASK; seq |= (SCB_SEQNUM(scb, p->priority) << SEQNUM_SHIFT); h->seq_ctrl = cpu_to_le16(seq); frameid = ((seq << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) | (queue & TXFID_QUEUE_MASK); } } frameid |= queue & TXFID_QUEUE_MASK; /* set the ignpmq bit for all pkts tx'd in PS mode and for beacons */ if (SCB_PS(scb) || ieee80211_is_beacon(h->frame_control)) mcl |= TXC_IGNOREPMQ; txrate[0] = tx_info->control.rates; txrate[1] = txrate[0] + 1; /* if rate control algorithm didn't give us a fallback rate, use the primary rate */ if (txrate[1]->idx < 0) { txrate[1] = txrate[0]; } for (k = 0; k < hw->max_rates; k++) { is_mcs[k] = txrate[k]->flags & IEEE80211_TX_RC_MCS ? true : false; if (!is_mcs[k]) { if ((txrate[k]->idx >= 0) && (txrate[k]->idx < hw->wiphy->bands[tx_info->band]->n_bitrates)) { rate_val[k] = hw->wiphy->bands[tx_info->band]-> bitrates[txrate[k]->idx].hw_value; short_preamble[k] = txrate[k]-> flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE ? true : false; } else { rate_val[k] = BRCM_RATE_1M; } } else { rate_val[k] = txrate[k]->idx; } /* Currently only support same setting for primay and fallback rates. * Unify flags for each rate into a single value for the frame */ use_rts |= txrate[k]-> flags & IEEE80211_TX_RC_USE_RTS_CTS ? true : false; use_cts |= txrate[k]-> flags & IEEE80211_TX_RC_USE_CTS_PROTECT ? true : false; if (is_mcs[k]) rate_val[k] |= NRATE_MCS_INUSE; rspec[k] = mac80211_wlc_set_nrate(wlc, wlc->band, rate_val[k]); /* (1) RATE: determine and validate primary rate and fallback rates */ if (!RSPEC_ACTIVE(rspec[k])) { rspec[k] = BRCM_RATE_1M; } else { if (!is_multicast_ether_addr(h->addr1)) { /* set tx antenna config */ brcms_c_antsel_antcfg_get(wlc->asi, false, false, 0, 0, &antcfg, &fbantcfg); } } } phyctl1_stf = wlc->stf->ss_opmode; if (N_ENAB(wlc->pub)) { for (k = 0; k < hw->max_rates; k++) { /* apply siso/cdd to single stream mcs's or ofdm if rspec is auto selected */ if (((IS_MCS(rspec[k]) && IS_SINGLE_STREAM(rspec[k] & RSPEC_RATE_MASK)) || IS_OFDM(rspec[k])) && ((rspec[k] & RSPEC_OVERRIDE_MCS_ONLY) || !(rspec[k] & RSPEC_OVERRIDE))) { rspec[k] &= ~(RSPEC_STF_MASK | RSPEC_STC_MASK); /* For SISO MCS use STBC if possible */ if (IS_MCS(rspec[k]) && BRCMS_STF_SS_STBC_TX(wlc, scb)) { u8 stc; stc = 1; /* Nss for single stream is always 1 */ rspec[k] |= (PHY_TXC1_MODE_STBC << RSPEC_STF_SHIFT) | (stc << RSPEC_STC_SHIFT); } else rspec[k] |= (phyctl1_stf << RSPEC_STF_SHIFT); } /* Is the phy configured to use 40MHZ frames? If so then pick the desired txbw */ if (CHSPEC_WLC_BW(wlc->chanspec) == BRCMS_40_MHZ) { /* default txbw is 20in40 SB */ mimo_ctlchbw = mimo_txbw = CHSPEC_SB_UPPER(BRCMS_BAND_PI_RADIO_CHANSPEC) ? PHY_TXC1_BW_20MHZ_UP : PHY_TXC1_BW_20MHZ; if (IS_MCS(rspec[k])) { /* mcs 32 must be 40b/w DUP */ if ((rspec[k] & RSPEC_RATE_MASK) == 32) { mimo_txbw = PHY_TXC1_BW_40MHZ_DUP; /* use override */ } else if (wlc->mimo_40txbw != AUTO) mimo_txbw = wlc->mimo_40txbw; /* else check if dst is using 40 Mhz */ else if (scb->flags & SCB_IS40) mimo_txbw = PHY_TXC1_BW_40MHZ; } else if (IS_OFDM(rspec[k])) { if (wlc->ofdm_40txbw != AUTO) mimo_txbw = wlc->ofdm_40txbw; } else { if (wlc->cck_40txbw != AUTO) mimo_txbw = wlc->cck_40txbw; } } else { /* mcs32 is 40 b/w only. * This is possible for probe packets on a STA during SCAN */ if ((rspec[k] & RSPEC_RATE_MASK) == 32) { /* mcs 0 */ rspec[k] = RSPEC_MIMORATE; } mimo_txbw = PHY_TXC1_BW_20MHZ; } /* Set channel width */ rspec[k] &= ~RSPEC_BW_MASK; if ((k == 0) || ((k > 0) && IS_MCS(rspec[k]))) rspec[k] |= (mimo_txbw << RSPEC_BW_SHIFT); else rspec[k] |= (mimo_ctlchbw << RSPEC_BW_SHIFT); /* Set Short GI */ #ifdef NOSGIYET if (IS_MCS(rspec[k]) && (txrate[k]->flags & IEEE80211_TX_RC_SHORT_GI)) rspec[k] |= RSPEC_SHORT_GI; else if (!(txrate[k]->flags & IEEE80211_TX_RC_SHORT_GI)) rspec[k] &= ~RSPEC_SHORT_GI; #else rspec[k] &= ~RSPEC_SHORT_GI; #endif mimo_preamble_type = BRCMS_MM_PREAMBLE; if (txrate[k]->flags & IEEE80211_TX_RC_GREEN_FIELD) mimo_preamble_type = BRCMS_GF_PREAMBLE; if ((txrate[k]->flags & IEEE80211_TX_RC_MCS) && (!IS_MCS(rspec[k]))) { wiphy_err(wlc->wiphy, "wl%d: %s: IEEE80211_TX_" "RC_MCS != IS_MCS(rspec)\n", BRCMS_UNIT(wlc), __func__); } if (IS_MCS(rspec[k])) { preamble_type[k] = mimo_preamble_type; /* if SGI is selected, then forced mm for single stream */ if ((rspec[k] & RSPEC_SHORT_GI) && IS_SINGLE_STREAM(rspec[k] & RSPEC_RATE_MASK)) { preamble_type[k] = BRCMS_MM_PREAMBLE; } } /* should be better conditionalized */ if (!IS_MCS(rspec[0]) && (tx_info->control.rates[0]. flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)) preamble_type[k] = BRCMS_SHORT_PREAMBLE; } } else { for (k = 0; k < hw->max_rates; k++) { /* Set ctrlchbw as 20Mhz */ rspec[k] &= ~RSPEC_BW_MASK; rspec[k] |= (PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT); /* for nphy, stf of ofdm frames must follow policies */ if (BRCMS_ISNPHY(wlc->band) && IS_OFDM(rspec[k])) { rspec[k] &= ~RSPEC_STF_MASK; rspec[k] |= phyctl1_stf << RSPEC_STF_SHIFT; } } } /* Reset these for use with AMPDU's */ txrate[0]->count = 0; txrate[1]->count = 0; /* (2) PROTECTION, may change rspec */ if ((ieee80211_is_data(h->frame_control) || ieee80211_is_mgmt(h->frame_control)) && (phylen > wlc->RTSThresh) && !is_multicast_ether_addr(h->addr1)) use_rts = true; /* (3) PLCP: determine PLCP header and MAC duration, * fill struct d11txh */ brcms_c_compute_plcp(wlc, rspec[0], phylen, plcp); brcms_c_compute_plcp(wlc, rspec[1], phylen, plcp_fallback); memcpy(&txh->FragPLCPFallback, plcp_fallback, sizeof(txh->FragPLCPFallback)); /* Length field now put in CCK FBR CRC field */ if (IS_CCK(rspec[1])) { txh->FragPLCPFallback[4] = phylen & 0xff; txh->FragPLCPFallback[5] = (phylen & 0xff00) >> 8; } /* MIMO-RATE: need validation ?? */ mainrates = IS_OFDM(rspec[0]) ? D11A_PHY_HDR_GRATE((struct ofdm_phy_hdr *) plcp) : plcp[0]; /* DUR field for main rate */ if (!ieee80211_is_pspoll(h->frame_control) && !is_multicast_ether_addr(h->addr1) && !use_rifs) { durid = brcms_c_compute_frame_dur(wlc, rspec[0], preamble_type[0], next_frag_len); h->duration_id = cpu_to_le16(durid); } else if (use_rifs) { /* NAV protect to end of next max packet size */ durid = (u16) brcms_c_calc_frame_time(wlc, rspec[0], preamble_type[0], DOT11_MAX_FRAG_LEN); durid += RIFS_11N_TIME; h->duration_id = cpu_to_le16(durid); } /* DUR field for fallback rate */ if (ieee80211_is_pspoll(h->frame_control)) txh->FragDurFallback = h->duration_id; else if (is_multicast_ether_addr(h->addr1) || use_rifs) txh->FragDurFallback = 0; else { durid = brcms_c_compute_frame_dur(wlc, rspec[1], preamble_type[1], next_frag_len); txh->FragDurFallback = cpu_to_le16(durid); } /* (4) MAC-HDR: MacTxControlLow */ if (frag == 0) mcl |= TXC_STARTMSDU; if (!is_multicast_ether_addr(h->addr1)) mcl |= TXC_IMMEDACK; if (BAND_5G(wlc->band->bandtype)) mcl |= TXC_FREQBAND_5G; if (CHSPEC_IS40(BRCMS_BAND_PI_RADIO_CHANSPEC)) mcl |= TXC_BW_40; /* set AMIC bit if using hardware TKIP MIC */ if (hwtkmic) mcl |= TXC_AMIC; txh->MacTxControlLow = cpu_to_le16(mcl); /* MacTxControlHigh */ mch = 0; /* Set fallback rate preamble type */ if ((preamble_type[1] == BRCMS_SHORT_PREAMBLE) || (preamble_type[1] == BRCMS_GF_PREAMBLE)) { if (RSPEC2RATE(rspec[1]) != BRCM_RATE_1M) mch |= TXC_PREAMBLE_DATA_FB_SHORT; } /* MacFrameControl */ memcpy(&txh->MacFrameControl, &h->frame_control, sizeof(u16)); txh->TxFesTimeNormal = cpu_to_le16(0); txh->TxFesTimeFallback = cpu_to_le16(0); /* TxFrameRA */ memcpy(&txh->TxFrameRA, &h->addr1, ETH_ALEN); /* TxFrameID */ txh->TxFrameID = cpu_to_le16(frameid); /* TxStatus, Note the case of recreating the first frag of a suppressed frame * then we may need to reset the retry cnt's via the status reg */ txh->TxStatus = cpu_to_le16(status); /* extra fields for ucode AMPDU aggregation, the new fields are added to * the END of previous structure so that it's compatible in driver. */ txh->MaxNMpdus = cpu_to_le16(0); txh->MaxABytes_MRT = cpu_to_le16(0); txh->MaxABytes_FBR = cpu_to_le16(0); txh->MinMBytes = cpu_to_le16(0); /* (5) RTS/CTS: determine RTS/CTS PLCP header and MAC duration, * furnish struct d11txh */ /* RTS PLCP header and RTS frame */ if (use_rts || use_cts) { if (use_rts && use_cts) use_cts = false; for (k = 0; k < 2; k++) { rts_rspec[k] = brcms_c_rspec_to_rts_rspec(wlc, rspec[k], false, mimo_ctlchbw); } if (!IS_OFDM(rts_rspec[0]) && !((RSPEC2RATE(rts_rspec[0]) == BRCM_RATE_1M) || (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) { rts_preamble_type[0] = BRCMS_SHORT_PREAMBLE; mch |= TXC_PREAMBLE_RTS_MAIN_SHORT; } if (!IS_OFDM(rts_rspec[1]) && !((RSPEC2RATE(rts_rspec[1]) == BRCM_RATE_1M) || (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) { rts_preamble_type[1] = BRCMS_SHORT_PREAMBLE; mch |= TXC_PREAMBLE_RTS_FB_SHORT; } /* RTS/CTS additions to MacTxControlLow */ if (use_cts) { txh->MacTxControlLow |= cpu_to_le16(TXC_SENDCTS); } else { txh->MacTxControlLow |= cpu_to_le16(TXC_SENDRTS); txh->MacTxControlLow |= cpu_to_le16(TXC_LONGFRAME); } /* RTS PLCP header */ rts_plcp = txh->RTSPhyHeader; if (use_cts) rts_phylen = DOT11_CTS_LEN + FCS_LEN; else rts_phylen = DOT11_RTS_LEN + FCS_LEN; brcms_c_compute_plcp(wlc, rts_rspec[0], rts_phylen, rts_plcp); /* fallback rate version of RTS PLCP header */ brcms_c_compute_plcp(wlc, rts_rspec[1], rts_phylen, rts_plcp_fallback); memcpy(&txh->RTSPLCPFallback, rts_plcp_fallback, sizeof(txh->RTSPLCPFallback)); /* RTS frame fields... */ rts = (struct ieee80211_rts *)&txh->rts_frame; durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec[0], rspec[0], rts_preamble_type[0], preamble_type[0], phylen, false); rts->duration = cpu_to_le16(durid); /* fallback rate version of RTS DUR field */ durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec[1], rspec[1], rts_preamble_type[1], preamble_type[1], phylen, false); txh->RTSDurFallback = cpu_to_le16(durid); if (use_cts) { rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); memcpy(&rts->ra, &h->addr2, ETH_ALEN); } else { rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); memcpy(&rts->ra, &h->addr1, 2 * ETH_ALEN); } /* mainrate * low 8 bits: main frag rate/mcs, * high 8 bits: rts/cts rate/mcs */ mainrates |= (IS_OFDM(rts_rspec[0]) ? D11A_PHY_HDR_GRATE( (struct ofdm_phy_hdr *) rts_plcp) : rts_plcp[0]) << 8; } else { memset((char *)txh->RTSPhyHeader, 0, D11_PHY_HDR_LEN); memset((char *)&txh->rts_frame, 0, sizeof(struct ieee80211_rts)); memset((char *)txh->RTSPLCPFallback, 0, sizeof(txh->RTSPLCPFallback)); txh->RTSDurFallback = 0; } #ifdef SUPPORT_40MHZ /* add null delimiter count */ if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && IS_MCS(rspec)) { txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] = brcm_c_ampdu_null_delim_cnt(wlc->ampdu, scb, rspec, phylen); } #endif /* Now that RTS/RTS FB preamble types are updated, write the final value */ txh->MacTxControlHigh = cpu_to_le16(mch); /* MainRates (both the rts and frag plcp rates have been calculated now) */ txh->MainRates = cpu_to_le16(mainrates); /* XtraFrameTypes */ xfts = FRAMETYPE(rspec[1], wlc->mimoft); xfts |= (FRAMETYPE(rts_rspec[0], wlc->mimoft) << XFTS_RTS_FT_SHIFT); xfts |= (FRAMETYPE(rts_rspec[1], wlc->mimoft) << XFTS_FBRRTS_FT_SHIFT); xfts |= CHSPEC_CHANNEL(BRCMS_BAND_PI_RADIO_CHANSPEC) << XFTS_CHANNEL_SHIFT; txh->XtraFrameTypes = cpu_to_le16(xfts); /* PhyTxControlWord */ phyctl = FRAMETYPE(rspec[0], wlc->mimoft); if ((preamble_type[0] == BRCMS_SHORT_PREAMBLE) || (preamble_type[0] == BRCMS_GF_PREAMBLE)) { if (RSPEC2RATE(rspec[0]) != BRCM_RATE_1M) phyctl |= PHY_TXC_SHORT_HDR; } /* phytxant is properly bit shifted */ phyctl |= brcms_c_stf_d11hdrs_phyctl_txant(wlc, rspec[0]); txh->PhyTxControlWord = cpu_to_le16(phyctl); /* PhyTxControlWord_1 */ if (BRCMS_PHY_11N_CAP(wlc->band)) { u16 phyctl1 = 0; phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[0]); txh->PhyTxControlWord_1 = cpu_to_le16(phyctl1); phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[1]); txh->PhyTxControlWord_1_Fbr = cpu_to_le16(phyctl1); if (use_rts || use_cts) { phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[0]); txh->PhyTxControlWord_1_Rts = cpu_to_le16(phyctl1); phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[1]); txh->PhyTxControlWord_1_FbrRts = cpu_to_le16(phyctl1); } /* * For mcs frames, if mixedmode(overloaded with long preamble) is going to be set, * fill in non-zero MModeLen and/or MModeFbrLen * it will be unnecessary if they are separated */ if (IS_MCS(rspec[0]) && (preamble_type[0] == BRCMS_MM_PREAMBLE)) { u16 mmodelen = brcms_c_calc_lsig_len(wlc, rspec[0], phylen); txh->MModeLen = cpu_to_le16(mmodelen); } if (IS_MCS(rspec[1]) && (preamble_type[1] == BRCMS_MM_PREAMBLE)) { u16 mmodefbrlen = brcms_c_calc_lsig_len(wlc, rspec[1], phylen); txh->MModeFbrLen = cpu_to_le16(mmodefbrlen); } } ac = skb_get_queue_mapping(p); if (SCB_WME(scb) && qos && wlc->edcf_txop[ac]) { uint frag_dur, dur, dur_fallback; /* WME: Update TXOP threshold */ if ((!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) && (frag == 0)) { frag_dur = brcms_c_calc_frame_time(wlc, rspec[0], preamble_type[0], phylen); if (rts) { /* 1 RTS or CTS-to-self frame */ dur = brcms_c_calc_cts_time(wlc, rts_rspec[0], rts_preamble_type[0]); dur_fallback = brcms_c_calc_cts_time(wlc, rts_rspec[1], rts_preamble_type[1]); /* (SIFS + CTS) + SIFS + frame + SIFS + ACK */ dur += le16_to_cpu(rts->duration); dur_fallback += le16_to_cpu(txh->RTSDurFallback); } else if (use_rifs) { dur = frag_dur; dur_fallback = 0; } else { /* frame + SIFS + ACK */ dur = frag_dur; dur += brcms_c_compute_frame_dur(wlc, rspec[0], preamble_type[0], 0); dur_fallback = brcms_c_calc_frame_time(wlc, rspec[1], preamble_type[1], phylen); dur_fallback += brcms_c_compute_frame_dur(wlc, rspec[1], preamble_type[1], 0); } /* NEED to set TxFesTimeNormal (hard) */ txh->TxFesTimeNormal = cpu_to_le16((u16) dur); /* NEED to set fallback rate version of TxFesTimeNormal (hard) */ txh->TxFesTimeFallback = cpu_to_le16((u16) dur_fallback); /* update txop byte threshold (txop minus intraframe overhead) */ if (wlc->edcf_txop[ac] >= (dur - frag_dur)) { { uint newfragthresh; newfragthresh = brcms_c_calc_frame_len(wlc, rspec[0], preamble_type[0], (wlc->edcf_txop[ac] - (dur - frag_dur))); /* range bound the fragthreshold */ if (newfragthresh < DOT11_MIN_FRAG_LEN) newfragthresh = DOT11_MIN_FRAG_LEN; else if (newfragthresh > wlc->usr_fragthresh) newfragthresh = wlc->usr_fragthresh; /* update the fragthresh and do txc update */ if (wlc->fragthresh[queue] != (u16) newfragthresh) { wlc->fragthresh[queue] = (u16) newfragthresh; } } } else wiphy_err(wlc->wiphy, "wl%d: %s txop invalid " "for rate %d\n", wlc->pub->unit, fifo_names[queue], RSPEC2RATE(rspec[0])); if (dur > wlc->edcf_txop[ac]) wiphy_err(wlc->wiphy, "wl%d: %s: %s txop " "exceeded phylen %d/%d dur %d/%d\n", wlc->pub->unit, __func__, fifo_names[queue], phylen, wlc->fragthresh[queue], dur, wlc->edcf_txop[ac]); } } return 0; } void brcms_c_tbtt(struct brcms_c_info *wlc) { struct brcms_bss_cfg *cfg = wlc->cfg; if (!cfg->BSS) { /* DirFrmQ is now valid...defer setting until end of ATIM window */ wlc->qvalid |= MCMD_DIRFRMQVAL; } } static void brcms_c_war16165(struct brcms_c_info *wlc, bool tx) { if (tx) { /* the post-increment is used in STAY_AWAKE macro */ if (wlc->txpend16165war++ == 0) brcms_c_set_ps_ctrl(wlc); } else { wlc->txpend16165war--; if (wlc->txpend16165war == 0) brcms_c_set_ps_ctrl(wlc); } } /* process an individual struct tx_status */ bool brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs, u32 frm_tx2) { struct sk_buff *p; uint queue; struct d11txh *txh; struct scb *scb = NULL; bool free_pdu; int tx_rts, tx_frame_count, tx_rts_count; uint totlen, supr_status; bool lastframe; struct ieee80211_hdr *h; u16 mcl; struct ieee80211_tx_info *tx_info; struct ieee80211_tx_rate *txrate; int i; (void)(frm_tx2); /* Compiler reference to avoid unused variable warning */ /* discard intermediate indications for ucode with one legitimate case: * e.g. if "useRTS" is set. ucode did a successful rts/cts exchange, but the subsequent * tx of DATA failed. so it will start rts/cts from the beginning (resetting the rts * transmission count) */ if (!(txs->status & TX_STATUS_AMPDU) && (txs->status & TX_STATUS_INTERMEDIATE)) { wiphy_err(wlc->wiphy, "%s: INTERMEDIATE but not AMPDU\n", __func__); return false; } queue = txs->frameid & TXFID_QUEUE_MASK; if (queue >= NFIFO) { p = NULL; goto fatal; } p = GETNEXTTXP(wlc, queue); if (BRCMS_WAR16165(wlc)) brcms_c_war16165(wlc, false); if (p == NULL) goto fatal; txh = (struct d11txh *) (p->data); mcl = le16_to_cpu(txh->MacTxControlLow); if (txs->phyerr) { if (WL_ERROR_ON()) { wiphy_err(wlc->wiphy, "phyerr 0x%x, rate 0x%x\n", txs->phyerr, txh->MainRates); brcms_c_print_txdesc(txh); } brcms_c_print_txstatus(txs); } if (txs->frameid != cpu_to_le16(txh->TxFrameID)) goto fatal; tx_info = IEEE80211_SKB_CB(p); h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN); if (tx_info->control.sta) scb = (struct scb *)tx_info->control.sta->drv_priv; if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { brcms_c_ampdu_dotxstatus(wlc->ampdu, scb, p, txs); return false; } supr_status = txs->status & TX_STATUS_SUPR_MASK; if (supr_status == TX_STATUS_SUPR_BADCH) BCMMSG(wlc->wiphy, "%s: Pkt tx suppressed, possibly channel %d\n", __func__, CHSPEC_CHANNEL(wlc->default_bss->chanspec)); tx_rts = cpu_to_le16(txh->MacTxControlLow) & TXC_SENDRTS; tx_frame_count = (txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT; tx_rts_count = (txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT; lastframe = !ieee80211_has_morefrags(h->frame_control); if (!lastframe) { wiphy_err(wlc->wiphy, "Not last frame!\n"); } else { /* * Set information to be consumed by Minstrel ht. * * The "fallback limit" is the number of tx attempts a given * MPDU is sent at the "primary" rate. Tx attempts beyond that * limit are sent at the "secondary" rate. * A 'short frame' does not exceed RTS treshold. */ u16 sfbl, /* Short Frame Rate Fallback Limit */ lfbl, /* Long Frame Rate Fallback Limit */ fbl; if (queue < AC_COUNT) { sfbl = BRCMS_WME_RETRY_SFB_GET(wlc, wme_fifo2ac[queue]); lfbl = BRCMS_WME_RETRY_LFB_GET(wlc, wme_fifo2ac[queue]); } else { sfbl = wlc->SFBL; lfbl = wlc->LFBL; } txrate = tx_info->status.rates; if (txrate[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) fbl = lfbl; else fbl = sfbl; ieee80211_tx_info_clear_status(tx_info); if ((tx_frame_count > fbl) && (txrate[1].idx >= 0)) { /* rate selection requested a fallback rate and we used it */ txrate[0].count = fbl; txrate[1].count = tx_frame_count - fbl; } else { /* rate selection did not request fallback rate, or we didn't need it */ txrate[0].count = tx_frame_count; /* rc80211_minstrel.c:minstrel_tx_status() expects unused rates to be marked with idx = -1 */ txrate[1].idx = -1; txrate[1].count = 0; } /* clear the rest of the rates */ for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) { txrate[i].idx = -1; txrate[i].count = 0; } if (txs->status & TX_STATUS_ACK_RCV) tx_info->flags |= IEEE80211_TX_STAT_ACK; } totlen = brcmu_pkttotlen(p); free_pdu = true; brcms_c_txfifo_complete(wlc, queue, 1); if (lastframe) { p->next = NULL; p->prev = NULL; /* remove PLCP & Broadcom tx descriptor header */ skb_pull(p, D11_PHY_HDR_LEN); skb_pull(p, D11_TXH_LEN); ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, p); } else { wiphy_err(wlc->wiphy, "%s: Not last frame => not calling " "tx_status\n", __func__); } return false; fatal: if (p) brcmu_pkt_buf_free_skb(p); return true; } void brcms_c_txfifo_complete(struct brcms_c_info *wlc, uint fifo, s8 txpktpend) { TXPKTPENDDEC(wlc, fifo, txpktpend); BCMMSG(wlc->wiphy, "pktpend dec %d to %d\n", txpktpend, TXPKTPENDGET(wlc, fifo)); /* There is more room; mark precedences related to this FIFO sendable */ BRCMS_TX_FIFO_ENAB(wlc, fifo); /* Clear MHF2_TXBCMC_NOW flag if BCMC fifo has drained */ if (AP_ENAB(wlc->pub) && !TXPKTPENDGET(wlc, TX_BCMC_FIFO)) { brcms_c_mhf(wlc, MHF2, MHF2_TXBCMC_NOW, 0, BRCM_BAND_AUTO); } /* figure out which bsscfg is being worked on... */ } /* Update beacon listen interval in shared memory */ void brcms_c_bcn_li_upd(struct brcms_c_info *wlc) { if (AP_ENAB(wlc->pub)) return; /* wake up every DTIM is the default */ if (wlc->bcn_li_dtim == 1) brcms_c_write_shm(wlc, M_BCN_LI, 0); else brcms_c_write_shm(wlc, M_BCN_LI, (wlc->bcn_li_dtim << 8) | wlc->bcn_li_bcn); } /* * recover 64bit TSF value from the 16bit TSF value in the rx header * given the assumption that the TSF passed in header is within 65ms * of the current tsf. * * 6 5 4 4 3 2 1 * 3.......6.......8.......0.......2.......4.......6.......8......0 * |<---------- tsf_h ----------->||<--- tsf_l -->||<-RxTSFTime ->| * * The RxTSFTime are the lowest 16 bits and provided by the ucode. The * tsf_l is filled in by brcms_b_recv, which is done earlier in the * receive call sequence after rx interrupt. Only the higher 16 bits * are used. Finally, the tsf_h is read from the tsf register. */ static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc, struct brcms_d11rxhdr *rxh) { u32 tsf_h, tsf_l; u16 rx_tsf_0_15, rx_tsf_16_31; brcms_b_read_tsf(wlc->hw, &tsf_l, &tsf_h); rx_tsf_16_31 = (u16)(tsf_l >> 16); rx_tsf_0_15 = rxh->rxhdr.RxTSFTime; /* * a greater tsf time indicates the low 16 bits of * tsf_l wrapped, so decrement the high 16 bits. */ if ((u16)tsf_l < rx_tsf_0_15) { rx_tsf_16_31 -= 1; if (rx_tsf_16_31 == 0xffff) tsf_h -= 1; } return ((u64)tsf_h << 32) | (((u32)rx_tsf_16_31 << 16) + rx_tsf_0_15); } static void prep_mac80211_status(struct brcms_c_info *wlc, struct d11rxhdr *rxh, struct sk_buff *p, struct ieee80211_rx_status *rx_status) { struct brcms_d11rxhdr *wlc_rxh = (struct brcms_d11rxhdr *) rxh; int preamble; int channel; ratespec_t rspec; unsigned char *plcp; /* fill in TSF and flag its presence */ rx_status->mactime = brcms_c_recover_tsf64(wlc, wlc_rxh); rx_status->flag |= RX_FLAG_MACTIME_MPDU; channel = BRCMS_CHAN_CHANNEL(rxh->RxChan); if (channel > 14) { rx_status->band = IEEE80211_BAND_5GHZ; rx_status->freq = ieee80211_ofdm_chan_to_freq( WF_CHAN_FACTOR_5_G/2, channel); } else { rx_status->band = IEEE80211_BAND_2GHZ; rx_status->freq = ieee80211_dsss_chan_to_freq(channel); } rx_status->signal = wlc_rxh->rssi; /* signal */ /* noise */ /* qual */ rx_status->antenna = (rxh->PhyRxStatus_0 & PRXS0_RXANT_UPSUBBAND) ? 1 : 0; /* ant */ plcp = p->data; rspec = brcms_c_compute_rspec(rxh, plcp); if (IS_MCS(rspec)) { rx_status->rate_idx = rspec & RSPEC_RATE_MASK; rx_status->flag |= RX_FLAG_HT; if (RSPEC_IS40MHZ(rspec)) rx_status->flag |= RX_FLAG_40MHZ; } else { switch (RSPEC2RATE(rspec)) { case BRCM_RATE_1M: rx_status->rate_idx = 0; break; case BRCM_RATE_2M: rx_status->rate_idx = 1; break; case BRCM_RATE_5M5: rx_status->rate_idx = 2; break; case BRCM_RATE_11M: rx_status->rate_idx = 3; break; case BRCM_RATE_6M: rx_status->rate_idx = 4; break; case BRCM_RATE_9M: rx_status->rate_idx = 5; break; case BRCM_RATE_12M: rx_status->rate_idx = 6; break; case BRCM_RATE_18M: rx_status->rate_idx = 7; break; case BRCM_RATE_24M: rx_status->rate_idx = 8; break; case BRCM_RATE_36M: rx_status->rate_idx = 9; break; case BRCM_RATE_48M: rx_status->rate_idx = 10; break; case BRCM_RATE_54M: rx_status->rate_idx = 11; break; default: wiphy_err(wlc->wiphy, "%s: Unknown rate\n", __func__); } /* Determine short preamble and rate_idx */ preamble = 0; if (IS_CCK(rspec)) { if (rxh->PhyRxStatus_0 & PRXS0_SHORTH) rx_status->flag |= RX_FLAG_SHORTPRE; } else if (IS_OFDM(rspec)) { rx_status->flag |= RX_FLAG_SHORTPRE; } else { wiphy_err(wlc->wiphy, "%s: Unknown modulation\n", __func__); } } if (PLCP3_ISSGI(plcp[3])) rx_status->flag |= RX_FLAG_SHORT_GI; if (rxh->RxStatus1 & RXS_DECERR) { rx_status->flag |= RX_FLAG_FAILED_PLCP_CRC; wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_PLCP_CRC\n", __func__); } if (rxh->RxStatus1 & RXS_FCSERR) { rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; wiphy_err(wlc->wiphy, "%s: RX_FLAG_FAILED_FCS_CRC\n", __func__); } } static void brcms_c_recvctl(struct brcms_c_info *wlc, struct d11rxhdr *rxh, struct sk_buff *p) { int len_mpdu; struct ieee80211_rx_status rx_status; memset(&rx_status, 0, sizeof(rx_status)); prep_mac80211_status(wlc, rxh, p, &rx_status); /* mac header+body length, exclude CRC and plcp header */ len_mpdu = p->len - D11_PHY_HDR_LEN - FCS_LEN; skb_pull(p, D11_PHY_HDR_LEN); __skb_trim(p, len_mpdu); memcpy(IEEE80211_SKB_RXCB(p), &rx_status, sizeof(rx_status)); ieee80211_rx_irqsafe(wlc->pub->ieee_hw, p); return; } /* Process received frames */ /* * Return true if more frames need to be processed. false otherwise. * Param 'bound' indicates max. # frames to process before break out. */ void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p) { struct d11rxhdr *rxh; struct ieee80211_hdr *h; uint len; bool is_amsdu; BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit); /* frame starts with rxhdr */ rxh = (struct d11rxhdr *) (p->data); /* strip off rxhdr */ skb_pull(p, BRCMS_HWRXOFF); /* fixup rx header endianness */ rxh->RxFrameSize = le16_to_cpu(rxh->RxFrameSize); rxh->PhyRxStatus_0 = le16_to_cpu(rxh->PhyRxStatus_0); rxh->PhyRxStatus_1 = le16_to_cpu(rxh->PhyRxStatus_1); rxh->PhyRxStatus_2 = le16_to_cpu(rxh->PhyRxStatus_2); rxh->PhyRxStatus_3 = le16_to_cpu(rxh->PhyRxStatus_3); rxh->PhyRxStatus_4 = le16_to_cpu(rxh->PhyRxStatus_4); rxh->PhyRxStatus_5 = le16_to_cpu(rxh->PhyRxStatus_5); rxh->RxStatus1 = le16_to_cpu(rxh->RxStatus1); rxh->RxStatus2 = le16_to_cpu(rxh->RxStatus2); rxh->RxTSFTime = le16_to_cpu(rxh->RxTSFTime); rxh->RxChan = le16_to_cpu(rxh->RxChan); /* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */ if (rxh->RxStatus1 & RXS_PBPRES) { if (p->len < 2) { wiphy_err(wlc->wiphy, "wl%d: recv: rcvd runt of " "len %d\n", wlc->pub->unit, p->len); goto toss; } skb_pull(p, 2); } h = (struct ieee80211_hdr *)(p->data + D11_PHY_HDR_LEN); len = p->len; if (rxh->RxStatus1 & RXS_FCSERR) { if (wlc->pub->mac80211_state & MAC80211_PROMISC_BCNS) { wiphy_err(wlc->wiphy, "FCSERR while scanning******* -" " tossing\n"); goto toss; } else { wiphy_err(wlc->wiphy, "RCSERR!!!\n"); goto toss; } } /* check received pkt has at least frame control field */ if (len < D11_PHY_HDR_LEN + sizeof(h->frame_control)) { goto toss; } is_amsdu = rxh->RxStatus2 & RXS_AMSDU_MASK; /* explicitly test bad src address to avoid sending bad deauth */ if (!is_amsdu) { /* CTS and ACK CTL frames are w/o a2 */ if (ieee80211_is_data(h->frame_control) || ieee80211_is_mgmt(h->frame_control)) { if ((is_zero_ether_addr(h->addr2) || is_multicast_ether_addr(h->addr2))) { wiphy_err(wlc->wiphy, "wl%d: %s: dropping a " "frame with invalid src mac address," " a2: %pM\n", wlc->pub->unit, __func__, h->addr2); goto toss; } } } /* due to sheer numbers, toss out probe reqs for now */ if (ieee80211_is_probe_req(h->frame_control)) goto toss; if (is_amsdu) goto toss; brcms_c_recvctl(wlc, rxh, p); return; toss: brcmu_pkt_buf_free_skb(p); } /* calculate frame duration for Mixed-mode L-SIG spoofing, return * number of bytes goes in the length field * * Formula given by HT PHY Spec v 1.13 * len = 3(nsyms + nstream + 3) - 3 */ u16 brcms_c_calc_lsig_len(struct brcms_c_info *wlc, ratespec_t ratespec, uint mac_len) { uint nsyms, len = 0, kNdps; BCMMSG(wlc->wiphy, "wl%d: rate %d, len%d\n", wlc->pub->unit, RSPEC2RATE(ratespec), mac_len); if (IS_MCS(ratespec)) { uint mcs = ratespec & RSPEC_RATE_MASK; /* MCS_TXS(mcs) returns num tx streams - 1 */ int tot_streams = (MCS_TXS(mcs) + 1) + RSPEC_STC(ratespec); /* the payload duration calculation matches that of regular ofdm */ /* 1000Ndbps = kbps * 4 */ kNdps = MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec), RSPEC_ISSGI(ratespec)) * 4; if (RSPEC_STC(ratespec) == 0) /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */ nsyms = CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS) * 1000, kNdps); else /* STBC needs to have even number of symbols */ nsyms = 2 * CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS) * 1000, 2 * kNdps); nsyms += (tot_streams + 3); /* (+3) account for HT-SIG(2) and HT-STF(1) */ /* 3 bytes/symbol @ legacy 6Mbps rate */ len = (3 * nsyms) - 3; /* (-3) excluding service bits and tail bits */ } return (u16) len; } /* calculate frame duration of a given rate and length, return time in usec unit */ uint brcms_c_calc_frame_time(struct brcms_c_info *wlc, ratespec_t ratespec, u8 preamble_type, uint mac_len) { uint nsyms, dur = 0, Ndps, kNdps; uint rate = RSPEC2RATE(ratespec); if (rate == 0) { wiphy_err(wlc->wiphy, "wl%d: WAR: using rate of 1 mbps\n", wlc->pub->unit); rate = BRCM_RATE_1M; } BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, len%d\n", wlc->pub->unit, ratespec, preamble_type, mac_len); if (IS_MCS(ratespec)) { uint mcs = ratespec & RSPEC_RATE_MASK; int tot_streams = MCS_TXS(mcs) + RSPEC_STC(ratespec); dur = PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT); if (preamble_type == BRCMS_MM_PREAMBLE) dur += PREN_MM_EXT; /* 1000Ndbps = kbps * 4 */ kNdps = MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec), RSPEC_ISSGI(ratespec)) * 4; if (RSPEC_STC(ratespec) == 0) /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */ nsyms = CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS) * 1000, kNdps); else /* STBC needs to have even number of symbols */ nsyms = 2 * CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS) * 1000, 2 * kNdps); dur += APHY_SYMBOL_TIME * nsyms; if (BAND_2G(wlc->band->bandtype)) dur += DOT11_OFDM_SIGNAL_EXTENSION; } else if (IS_OFDM(rate)) { dur = APHY_PREAMBLE_TIME; dur += APHY_SIGNAL_TIME; /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */ Ndps = rate * 2; /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */ nsyms = CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS), Ndps); dur += APHY_SYMBOL_TIME * nsyms; if (BAND_2G(wlc->band->bandtype)) dur += DOT11_OFDM_SIGNAL_EXTENSION; } else { /* calc # bits * 2 so factor of 2 in rate (1/2 mbps) will divide out */ mac_len = mac_len * 8 * 2; /* calc ceiling of bits/rate = microseconds of air time */ dur = (mac_len + rate - 1) / rate; if (preamble_type & BRCMS_SHORT_PREAMBLE) dur += BPHY_PLCP_SHORT_TIME; else dur += BPHY_PLCP_TIME; } return dur; } /* The opposite of brcms_c_calc_frame_time */ static uint brcms_c_calc_frame_len(struct brcms_c_info *wlc, ratespec_t ratespec, u8 preamble_type, uint dur) { uint nsyms, mac_len, Ndps, kNdps; uint rate = RSPEC2RATE(ratespec); BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, dur %d\n", wlc->pub->unit, ratespec, preamble_type, dur); if (IS_MCS(ratespec)) { uint mcs = ratespec & RSPEC_RATE_MASK; int tot_streams = MCS_TXS(mcs) + RSPEC_STC(ratespec); dur -= PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT); /* payload calculation matches that of regular ofdm */ if (BAND_2G(wlc->band->bandtype)) dur -= DOT11_OFDM_SIGNAL_EXTENSION; /* kNdbps = kbps * 4 */ kNdps = MCS_RATE(mcs, RSPEC_IS40MHZ(ratespec), RSPEC_ISSGI(ratespec)) * 4; nsyms = dur / APHY_SYMBOL_TIME; mac_len = ((nsyms * kNdps) - ((APHY_SERVICE_NBITS + APHY_TAIL_NBITS) * 1000)) / 8000; } else if (IS_OFDM(ratespec)) { dur -= APHY_PREAMBLE_TIME; dur -= APHY_SIGNAL_TIME; /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */ Ndps = rate * 2; nsyms = dur / APHY_SYMBOL_TIME; mac_len = ((nsyms * Ndps) - (APHY_SERVICE_NBITS + APHY_TAIL_NBITS)) / 8; } else { if (preamble_type & BRCMS_SHORT_PREAMBLE) dur -= BPHY_PLCP_SHORT_TIME; else dur -= BPHY_PLCP_TIME; mac_len = dur * rate; /* divide out factor of 2 in rate (1/2 mbps) */ mac_len = mac_len / 8 / 2; } return mac_len; } static uint brcms_c_calc_ba_time(struct brcms_c_info *wlc, ratespec_t rspec, u8 preamble_type) { BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, " "preamble_type %d\n", wlc->pub->unit, rspec, preamble_type); /* Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that is less than * or equal to the rate of the immediately previous frame in the FES */ rspec = BRCMS_BASIC_RATE(wlc, rspec); /* BA len == 32 == 16(ctl hdr) + 4(ba len) + 8(bitmap) + 4(fcs) */ return brcms_c_calc_frame_time(wlc, rspec, preamble_type, (DOT11_BA_LEN + DOT11_BA_BITMAP_LEN + FCS_LEN)); } static uint brcms_c_calc_ack_time(struct brcms_c_info *wlc, ratespec_t rspec, u8 preamble_type) { uint dur = 0; BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d\n", wlc->pub->unit, rspec, preamble_type); /* Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that is less than * or equal to the rate of the immediately previous frame in the FES */ rspec = BRCMS_BASIC_RATE(wlc, rspec); /* ACK frame len == 14 == 2(fc) + 2(dur) + 6(ra) + 4(fcs) */ dur = brcms_c_calc_frame_time(wlc, rspec, preamble_type, (DOT11_ACK_LEN + FCS_LEN)); return dur; } static uint brcms_c_calc_cts_time(struct brcms_c_info *wlc, ratespec_t rspec, u8 preamble_type) { BCMMSG(wlc->wiphy, "wl%d: ratespec 0x%x, preamble_type %d\n", wlc->pub->unit, rspec, preamble_type); return brcms_c_calc_ack_time(wlc, rspec, preamble_type); } /* derive wlc->band->basic_rate[] table from 'rateset' */ void brcms_c_rate_lookup_init(struct brcms_c_info *wlc, wlc_rateset_t *rateset) { u8 rate; u8 mandatory; u8 cck_basic = 0; u8 ofdm_basic = 0; u8 *br = wlc->band->basic_rate; uint i; /* incoming rates are in 500kbps units as in 802.11 Supported Rates */ memset(br, 0, BRCM_MAXRATE + 1); /* For each basic rate in the rates list, make an entry in the * best basic lookup. */ for (i = 0; i < rateset->count; i++) { /* only make an entry for a basic rate */ if (!(rateset->rates[i] & BRCMS_RATE_FLAG)) continue; /* mask off basic bit */ rate = (rateset->rates[i] & BRCMS_RATE_MASK); if (rate > BRCM_MAXRATE) { wiphy_err(wlc->wiphy, "brcms_c_rate_lookup_init: " "invalid rate 0x%X in rate set\n", rateset->rates[i]); continue; } br[rate] = rate; } /* The rate lookup table now has non-zero entries for each * basic rate, equal to the basic rate: br[basicN] = basicN * * To look up the best basic rate corresponding to any * particular rate, code can use the basic_rate table * like this * * basic_rate = wlc->band->basic_rate[tx_rate] * * Make sure there is a best basic rate entry for * every rate by walking up the table from low rates * to high, filling in holes in the lookup table */ for (i = 0; i < wlc->band->hw_rateset.count; i++) { rate = wlc->band->hw_rateset.rates[i]; if (br[rate] != 0) { /* This rate is a basic rate. * Keep track of the best basic rate so far by * modulation type. */ if (IS_OFDM(rate)) ofdm_basic = rate; else cck_basic = rate; continue; } /* This rate is not a basic rate so figure out the * best basic rate less than this rate and fill in * the hole in the table */ br[rate] = IS_OFDM(rate) ? ofdm_basic : cck_basic; if (br[rate] != 0) continue; if (IS_OFDM(rate)) { /* In 11g and 11a, the OFDM mandatory rates are 6, 12, and 24 Mbps */ if (rate >= BRCM_RATE_24M) mandatory = BRCM_RATE_24M; else if (rate >= BRCM_RATE_12M) mandatory = BRCM_RATE_12M; else mandatory = BRCM_RATE_6M; } else { /* In 11b, all the CCK rates are mandatory 1 - 11 Mbps */ mandatory = rate; } br[rate] = mandatory; } } static void brcms_c_write_rate_shm(struct brcms_c_info *wlc, u8 rate, u8 basic_rate) { u8 phy_rate, index; u8 basic_phy_rate, basic_index; u16 dir_table, basic_table; u16 basic_ptr; /* Shared memory address for the table we are reading */ dir_table = IS_OFDM(basic_rate) ? M_RT_DIRMAP_A : M_RT_DIRMAP_B; /* Shared memory address for the table we are writing */ basic_table = IS_OFDM(rate) ? M_RT_BBRSMAP_A : M_RT_BBRSMAP_B; /* * for a given rate, the LS-nibble of the PLCP SIGNAL field is * the index into the rate table. */ phy_rate = rate_info[rate] & BRCMS_RATE_MASK; basic_phy_rate = rate_info[basic_rate] & BRCMS_RATE_MASK; index = phy_rate & 0xf; basic_index = basic_phy_rate & 0xf; /* Find the SHM pointer to the ACK rate entry by looking in the * Direct-map Table */ basic_ptr = brcms_c_read_shm(wlc, (dir_table + basic_index * 2)); /* Update the SHM BSS-basic-rate-set mapping table with the pointer * to the correct basic rate for the given incoming rate */ brcms_c_write_shm(wlc, (basic_table + index * 2), basic_ptr); } static const wlc_rateset_t *brcms_c_rateset_get_hwrs(struct brcms_c_info *wlc) { const wlc_rateset_t *rs_dflt; if (BRCMS_PHY_11N_CAP(wlc->band)) { if (BAND_5G(wlc->band->bandtype)) rs_dflt = &ofdm_mimo_rates; else rs_dflt = &cck_ofdm_mimo_rates; } else if (wlc->band->gmode) rs_dflt = &cck_ofdm_rates; else rs_dflt = &cck_rates; return rs_dflt; } void brcms_c_set_ratetable(struct brcms_c_info *wlc) { const wlc_rateset_t *rs_dflt; wlc_rateset_t rs; u8 rate, basic_rate; uint i; rs_dflt = brcms_c_rateset_get_hwrs(wlc); brcms_c_rateset_copy(rs_dflt, &rs); brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams); /* walk the phy rate table and update SHM basic rate lookup table */ for (i = 0; i < rs.count; i++) { rate = rs.rates[i] & BRCMS_RATE_MASK; /* for a given rate BRCMS_BASIC_RATE returns the rate at * which a response ACK/CTS should be sent. */ basic_rate = BRCMS_BASIC_RATE(wlc, rate); if (basic_rate == 0) { /* This should only happen if we are using a * restricted rateset. */ basic_rate = rs.rates[0] & BRCMS_RATE_MASK; } brcms_c_write_rate_shm(wlc, rate, basic_rate); } } /* * Return true if the specified rate is supported by the specified band. * BRCM_BAND_AUTO indicates the current band. */ bool brcms_c_valid_rate(struct brcms_c_info *wlc, ratespec_t rspec, int band, bool verbose) { wlc_rateset_t *hw_rateset; uint i; if ((band == BRCM_BAND_AUTO) || (band == wlc->band->bandtype)) { hw_rateset = &wlc->band->hw_rateset; } else if (NBANDS(wlc) > 1) { hw_rateset = &wlc->bandstate[OTHERBANDUNIT(wlc)]->hw_rateset; } else { /* other band specified and we are a single band device */ return false; } /* check if this is a mimo rate */ if (IS_MCS(rspec)) { if (!VALID_MCS((rspec & RSPEC_RATE_MASK))) goto error; return isset(hw_rateset->mcs, (rspec & RSPEC_RATE_MASK)); } for (i = 0; i < hw_rateset->count; i++) if (hw_rateset->rates[i] == RSPEC2RATE(rspec)) return true; error: if (verbose) { wiphy_err(wlc->wiphy, "wl%d: valid_rate: rate spec 0x%x " "not in hw_rateset\n", wlc->pub->unit, rspec); } return false; } static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap) { uint i; struct brcms_band *band; for (i = 0; i < NBANDS(wlc); i++) { if (IS_SINGLEBAND_5G(wlc->deviceid)) i = BAND_5G_INDEX; band = wlc->bandstate[i]; if (band->bandtype == BRCM_BAND_5G) { if ((bwcap == BRCMS_N_BW_40ALL) || (bwcap == BRCMS_N_BW_20IN2G_40IN5G)) band->mimo_cap_40 = true; else band->mimo_cap_40 = false; } else { if (bwcap == BRCMS_N_BW_40ALL) band->mimo_cap_40 = true; else band->mimo_cap_40 = false; } } } void brcms_c_mod_prb_rsp_rate_table(struct brcms_c_info *wlc, uint frame_len) { const wlc_rateset_t *rs_dflt; wlc_rateset_t rs; u8 rate; u16 entry_ptr; u8 plcp[D11_PHY_HDR_LEN]; u16 dur, sifs; uint i; sifs = SIFS(wlc->band); rs_dflt = brcms_c_rateset_get_hwrs(wlc); brcms_c_rateset_copy(rs_dflt, &rs); brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams); /* walk the phy rate table and update MAC core SHM basic rate table entries */ for (i = 0; i < rs.count; i++) { rate = rs.rates[i] & BRCMS_RATE_MASK; entry_ptr = brcms_c_rate_shm_offset(wlc, rate); /* Calculate the Probe Response PLCP for the given rate */ brcms_c_compute_plcp(wlc, rate, frame_len, plcp); /* Calculate the duration of the Probe Response frame plus SIFS for the MAC */ dur = (u16) brcms_c_calc_frame_time(wlc, rate, BRCMS_LONG_PREAMBLE, frame_len); dur += sifs; /* Update the SHM Rate Table entry Probe Response values */ brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_PLCP_POS, (u16) (plcp[0] + (plcp[1] << 8))); brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_PLCP_POS + 2, (u16) (plcp[2] + (plcp[3] << 8))); brcms_c_write_shm(wlc, entry_ptr + M_RT_PRS_DUR_POS, dur); } } /* Max buffering needed for beacon template/prb resp template is 142 bytes. * * PLCP header is 6 bytes. * 802.11 A3 header is 24 bytes. * Max beacon frame body template length is 112 bytes. * Max probe resp frame body template length is 110 bytes. * * *len on input contains the max length of the packet available. * * The *len value is set to the number of bytes in buf used, and starts with the PLCP * and included up to, but not including, the 4 byte FCS. */ static void brcms_c_bcn_prb_template(struct brcms_c_info *wlc, u16 type, ratespec_t bcn_rspec, struct brcms_bss_cfg *cfg, u16 *buf, int *len) { static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255}; struct cck_phy_hdr *plcp; struct ieee80211_mgmt *h; int hdr_len, body_len; if (MBSS_BCN_ENAB(cfg) && type == IEEE80211_STYPE_BEACON) hdr_len = DOT11_MAC_HDR_LEN; else hdr_len = D11_PHY_HDR_LEN + DOT11_MAC_HDR_LEN; body_len = *len - hdr_len; /* calc buffer size provided for frame body */ *len = hdr_len + body_len; /* return actual size */ /* format PHY and MAC headers */ memset((char *)buf, 0, hdr_len); plcp = (struct cck_phy_hdr *) buf; /* PLCP for Probe Response frames are filled in from core's rate table */ if (type == IEEE80211_STYPE_BEACON && !MBSS_BCN_ENAB(cfg)) { /* fill in PLCP */ brcms_c_compute_plcp(wlc, bcn_rspec, (DOT11_MAC_HDR_LEN + body_len + FCS_LEN), (u8 *) plcp); } /* "Regular" and 16 MBSS but not for 4 MBSS */ /* Update the phytxctl for the beacon based on the rspec */ if (!SOFTBCN_ENAB(cfg)) brcms_c_beacon_phytxctl_txant_upd(wlc, bcn_rspec); if (MBSS_BCN_ENAB(cfg) && type == IEEE80211_STYPE_BEACON) h = (struct ieee80211_mgmt *)&plcp[0]; else h = (struct ieee80211_mgmt *)&plcp[1]; /* fill in 802.11 header */ h->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | type); /* DUR is 0 for multicast bcn, or filled in by MAC for prb resp */ /* A1 filled in by MAC for prb resp, broadcast for bcn */ if (type == IEEE80211_STYPE_BEACON) memcpy(&h->da, ðer_bcast, ETH_ALEN); memcpy(&h->sa, &cfg->cur_etheraddr, ETH_ALEN); memcpy(&h->bssid, &cfg->BSSID, ETH_ALEN); /* SEQ filled in by MAC */ return; } int brcms_c_get_header_len() { return TXOFF; } /* Update a beacon for a particular BSS * For MBSS, this updates the software template and sets "latest" to the index of the * template updated. * Otherwise, it updates the hardware template. */ void brcms_c_bss_update_beacon(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg) { int len = BCN_TMPL_LEN; /* Clear the soft intmask */ wlc->defmacintmask &= ~MI_BCNTPL; if (!cfg->up) { /* Only allow updates on an UP bss */ return; } /* Optimize: Some of if/else could be combined */ if (!MBSS_BCN_ENAB(cfg) && HWBCN_ENAB(cfg)) { /* Hardware beaconing for this config */ u16 bcn[BCN_TMPL_LEN / 2]; u32 both_valid = MCMD_BCN0VLD | MCMD_BCN1VLD; d11regs_t *regs = wlc->regs; /* Check if both templates are in use, if so sched. an interrupt * that will call back into this routine */ if ((R_REG(®s->maccommand) & both_valid) == both_valid) { /* clear any previous status */ W_REG(®s->macintstatus, MI_BCNTPL); } /* Check that after scheduling the interrupt both of the * templates are still busy. if not clear the int. & remask */ if ((R_REG(®s->maccommand) & both_valid) == both_valid) { wlc->defmacintmask |= MI_BCNTPL; return; } wlc->bcn_rspec = brcms_c_lowest_basic_rspec(wlc, &cfg->current_bss->rateset); /* update the template and ucode shm */ brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_BEACON, wlc->bcn_rspec, cfg, bcn, &len); brcms_c_write_hw_bcntemplates(wlc, bcn, len, false); } } /* * Update all beacons for the system. */ void brcms_c_update_beacon(struct brcms_c_info *wlc) { int idx; struct brcms_bss_cfg *bsscfg; /* update AP or IBSS beacons */ FOREACH_BSS(wlc, idx, bsscfg) { if (bsscfg->up && (BSSCFG_AP(bsscfg) || !bsscfg->BSS)) brcms_c_bss_update_beacon(wlc, bsscfg); } } /* Write ssid into shared memory */ void brcms_c_shm_ssid_upd(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg) { u8 *ssidptr = cfg->SSID; u16 base = M_SSID; u8 ssidbuf[IEEE80211_MAX_SSID_LEN]; /* padding the ssid with zero and copy it into shm */ memset(ssidbuf, 0, IEEE80211_MAX_SSID_LEN); memcpy(ssidbuf, ssidptr, cfg->SSID_len); brcms_c_copyto_shm(wlc, base, ssidbuf, IEEE80211_MAX_SSID_LEN); if (!MBSS_BCN_ENAB(cfg)) brcms_c_write_shm(wlc, M_SSIDLEN, (u16) cfg->SSID_len); } void brcms_c_update_probe_resp(struct brcms_c_info *wlc, bool suspend) { int idx; struct brcms_bss_cfg *bsscfg; /* update AP or IBSS probe responses */ FOREACH_BSS(wlc, idx, bsscfg) { if (bsscfg->up && (BSSCFG_AP(bsscfg) || !bsscfg->BSS)) brcms_c_bss_update_probe_resp(wlc, bsscfg, suspend); } } void brcms_c_bss_update_probe_resp(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg, bool suspend) { u16 prb_resp[BCN_TMPL_LEN / 2]; int len = BCN_TMPL_LEN; /* write the probe response to hardware, or save in the config structure */ if (!MBSS_PRB_ENAB(cfg)) { /* create the probe response template */ brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_PROBE_RESP, 0, cfg, prb_resp, &len); if (suspend) brcms_c_suspend_mac_and_wait(wlc); /* write the probe response into the template region */ brcms_b_write_template_ram(wlc->hw, T_PRS_TPL_BASE, (len + 3) & ~3, prb_resp); /* write the length of the probe response frame (+PLCP/-FCS) */ brcms_c_write_shm(wlc, M_PRB_RESP_FRM_LEN, (u16) len); /* write the SSID and SSID length */ brcms_c_shm_ssid_upd(wlc, cfg); /* * Write PLCP headers and durations for probe response frames at all rates. * Use the actual frame length covered by the PLCP header for the call to * brcms_c_mod_prb_rsp_rate_table() by subtracting the PLCP len * and adding the FCS. */ len += (-D11_PHY_HDR_LEN + FCS_LEN); brcms_c_mod_prb_rsp_rate_table(wlc, (u16) len); if (suspend) brcms_c_enable_mac(wlc); } else { /* Generating probe resp in sw; update local template */ /* error: No software probe response support without MBSS */ } } /* prepares pdu for transmission. returns BCM error codes */ int brcms_c_prep_pdu(struct brcms_c_info *wlc, struct sk_buff *pdu, uint *fifop) { uint fifo; struct d11txh *txh; struct ieee80211_hdr *h; struct scb *scb; txh = (struct d11txh *) (pdu->data); h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN); /* get the pkt queue info. This was put at brcms_c_sendctl or * brcms_c_send for PDU */ fifo = le16_to_cpu(txh->TxFrameID) & TXFID_QUEUE_MASK; scb = NULL; *fifop = fifo; /* return if insufficient dma resources */ if (TXAVAIL(wlc, fifo) < MAX_DMA_SEGS) { /* Mark precedences related to this FIFO, unsendable */ BRCMS_TX_FIFO_CLEAR(wlc, fifo); return -EBUSY; } return 0; } /* init tx reported rate mechanism */ void brcms_c_reprate_init(struct brcms_c_info *wlc) { int i; struct brcms_bss_cfg *bsscfg; FOREACH_BSS(wlc, i, bsscfg) { brcms_c_bsscfg_reprate_init(bsscfg); } } /* per bsscfg init tx reported rate mechanism */ void brcms_c_bsscfg_reprate_init(struct brcms_bss_cfg *bsscfg) { bsscfg->txrspecidx = 0; memset((char *)bsscfg->txrspec, 0, sizeof(bsscfg->txrspec)); } void brcms_default_rateset(struct brcms_c_info *wlc, wlc_rateset_t *rs) { brcms_c_rateset_default(rs, NULL, wlc->band->phytype, wlc->band->bandtype, false, BRCMS_RATE_MASK_FULL, (bool) N_ENAB(wlc->pub), CHSPEC_WLC_BW(wlc->default_bss->chanspec), wlc->stf->txstreams); } static void brcms_c_bss_default_init(struct brcms_c_info *wlc) { chanspec_t chanspec; struct brcms_band *band; struct brcms_bss_info *bi = wlc->default_bss; /* init default and target BSS with some sane initial values */ memset((char *)(bi), 0, sizeof(struct brcms_bss_info)); bi->beacon_period = BEACON_INTERVAL_DEFAULT; bi->dtim_period = DTIM_INTERVAL_DEFAULT; /* fill the default channel as the first valid channel * starting from the 2G channels */ chanspec = CH20MHZ_CHSPEC(1); wlc->home_chanspec = bi->chanspec = chanspec; /* find the band of our default channel */ band = wlc->band; if (NBANDS(wlc) > 1 && band->bandunit != CHSPEC_BANDUNIT(chanspec)) band = wlc->bandstate[OTHERBANDUNIT(wlc)]; /* init bss rates to the band specific default rate set */ brcms_c_rateset_default(&bi->rateset, NULL, band->phytype, band->bandtype, false, BRCMS_RATE_MASK_FULL, (bool) N_ENAB(wlc->pub), CHSPEC_WLC_BW(chanspec), wlc->stf->txstreams); if (N_ENAB(wlc->pub)) bi->flags |= BRCMS_BSS_HT; } static ratespec_t mac80211_wlc_set_nrate(struct brcms_c_info *wlc, struct brcms_band *cur_band, u32 int_val) { u8 stf = (int_val & NRATE_STF_MASK) >> NRATE_STF_SHIFT; u8 rate = int_val & NRATE_RATE_MASK; ratespec_t rspec; bool ismcs = ((int_val & NRATE_MCS_INUSE) == NRATE_MCS_INUSE); bool issgi = ((int_val & NRATE_SGI_MASK) >> NRATE_SGI_SHIFT); bool override_mcs_only = ((int_val & NRATE_OVERRIDE_MCS_ONLY) == NRATE_OVERRIDE_MCS_ONLY); int bcmerror = 0; if (!ismcs) { return (ratespec_t) rate; } /* validate the combination of rate/mcs/stf is allowed */ if (N_ENAB(wlc->pub) && ismcs) { /* mcs only allowed when nmode */ if (stf > PHY_TXC1_MODE_SDM) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid stf\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } /* mcs 32 is a special case, DUP mode 40 only */ if (rate == 32) { if (!CHSPEC_IS40(wlc->home_chanspec) || ((stf != PHY_TXC1_MODE_SISO) && (stf != PHY_TXC1_MODE_CDD))) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid mcs " "32\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } /* mcs > 7 must use stf SDM */ } else if (rate > HIGHEST_SINGLE_STREAM_MCS) { /* mcs > 7 must use stf SDM */ if (stf != PHY_TXC1_MODE_SDM) { BCMMSG(wlc->wiphy, "wl%d: enabling " "SDM mode for mcs %d\n", BRCMS_UNIT(wlc), rate); stf = PHY_TXC1_MODE_SDM; } } else { /* MCS 0-7 may use SISO, CDD, and for phy_rev >= 3 STBC */ if ((stf > PHY_TXC1_MODE_STBC) || (!BRCMS_STBC_CAP_PHY(wlc) && (stf == PHY_TXC1_MODE_STBC))) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid STBC" "\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } } } else if (IS_OFDM(rate)) { if ((stf != PHY_TXC1_MODE_CDD) && (stf != PHY_TXC1_MODE_SISO)) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid OFDM\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } } else if (IS_CCK(rate)) { if ((cur_band->bandtype != BRCM_BAND_2G) || (stf != PHY_TXC1_MODE_SISO)) { wiphy_err(wlc->wiphy, "wl%d: %s: Invalid CCK\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } } else { wiphy_err(wlc->wiphy, "wl%d: %s: Unknown rate type\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } /* make sure multiple antennae are available for non-siso rates */ if ((stf != PHY_TXC1_MODE_SISO) && (wlc->stf->txstreams == 1)) { wiphy_err(wlc->wiphy, "wl%d: %s: SISO antenna but !SISO " "request\n", BRCMS_UNIT(wlc), __func__); bcmerror = -EINVAL; goto done; } rspec = rate; if (ismcs) { rspec |= RSPEC_MIMORATE; /* For STBC populate the STC field of the ratespec */ if (stf == PHY_TXC1_MODE_STBC) { u8 stc; stc = 1; /* Nss for single stream is always 1 */ rspec |= (stc << RSPEC_STC_SHIFT); } } rspec |= (stf << RSPEC_STF_SHIFT); if (override_mcs_only) rspec |= RSPEC_OVERRIDE_MCS_ONLY; if (issgi) rspec |= RSPEC_SHORT_GI; if ((rate != 0) && !brcms_c_valid_rate(wlc, rspec, cur_band->bandtype, true)) { return rate; } return rspec; done: return rate; } /* formula: IDLE_BUSY_RATIO_X_16 = (100-duty_cycle)/duty_cycle*16 */ static int brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle, bool isOFDM, bool writeToShm) { int idle_busy_ratio_x_16 = 0; uint offset = isOFDM ? M_TX_IDLE_BUSY_RATIO_X_16_OFDM : M_TX_IDLE_BUSY_RATIO_X_16_CCK; if (duty_cycle > 100 || duty_cycle < 0) { wiphy_err(wlc->wiphy, "wl%d: duty cycle value off limit\n", wlc->pub->unit); return -EINVAL; } if (duty_cycle) idle_busy_ratio_x_16 = (100 - duty_cycle) * 16 / duty_cycle; /* Only write to shared memory when wl is up */ if (writeToShm) brcms_c_write_shm(wlc, offset, (u16) idle_busy_ratio_x_16); if (isOFDM) wlc->tx_duty_cycle_ofdm = (u16) duty_cycle; else wlc->tx_duty_cycle_cck = (u16) duty_cycle; return 0; } /* Read a single u16 from shared memory. * SHM 'offset' needs to be an even address */ u16 brcms_c_read_shm(struct brcms_c_info *wlc, uint offset) { return brcms_b_read_shm(wlc->hw, offset); } /* Write a single u16 to shared memory. * SHM 'offset' needs to be an even address */ void brcms_c_write_shm(struct brcms_c_info *wlc, uint offset, u16 v) { brcms_b_write_shm(wlc->hw, offset, v); } /* Copy a buffer to shared memory. * SHM 'offset' needs to be an even address and * Buffer length 'len' must be an even number of bytes */ void brcms_c_copyto_shm(struct brcms_c_info *wlc, uint offset, const void *buf, int len) { /* offset and len need to be even */ if (len <= 0 || (offset & 1) || (len & 1)) return; brcms_b_copyto_objmem(wlc->hw, offset, buf, len, OBJADDR_SHM_SEL); } /* wrapper BMAC functions to for HIGH driver access */ void brcms_c_mctrl(struct brcms_c_info *wlc, u32 mask, u32 val) { brcms_b_mctrl(wlc->hw, mask, val); } void brcms_c_mhf(struct brcms_c_info *wlc, u8 idx, u16 mask, u16 val, int bands) { brcms_b_mhf(wlc->hw, idx, mask, val, bands); } int brcms_c_xmtfifo_sz_get(struct brcms_c_info *wlc, uint fifo, uint *blocks) { return brcms_b_xmtfifo_sz_get(wlc->hw, fifo, blocks); } void brcms_c_write_template_ram(struct brcms_c_info *wlc, int offset, int len, void *buf) { brcms_b_write_template_ram(wlc->hw, offset, len, buf); } void brcms_c_write_hw_bcntemplates(struct brcms_c_info *wlc, void *bcn, int len, bool both) { brcms_b_write_hw_bcntemplates(wlc->hw, bcn, len, both); } void brcms_c_set_addrmatch(struct brcms_c_info *wlc, int match_reg_offset, const u8 *addr) { brcms_b_set_addrmatch(wlc->hw, match_reg_offset, addr); if (match_reg_offset == RCM_BSSID_OFFSET) memcpy(wlc->cfg->BSSID, addr, ETH_ALEN); } void brcms_c_pllreq(struct brcms_c_info *wlc, bool set, mbool req_bit) { brcms_b_pllreq(wlc->hw, set, req_bit); } void brcms_c_reset_bmac_done(struct brcms_c_info *wlc) { } /* check for the particular priority flow control bit being set */ bool brcms_c_txflowcontrol_prio_isset(struct brcms_c_info *wlc, struct brcms_txq_info *q, int prio) { uint prio_mask; if (prio == ALLPRIO) { prio_mask = TXQ_STOP_FOR_PRIOFC_MASK; } else { prio_mask = NBITVAL(prio); } return (q->stopped & prio_mask) == prio_mask; } /* propagate the flow control to all interfaces using the given tx queue */ void brcms_c_txflowcontrol(struct brcms_c_info *wlc, struct brcms_txq_info *qi, bool on, int prio) { uint prio_bits; uint cur_bits; BCMMSG(wlc->wiphy, "flow control kicks in\n"); if (prio == ALLPRIO) { prio_bits = TXQ_STOP_FOR_PRIOFC_MASK; } else { prio_bits = NBITVAL(prio); } cur_bits = qi->stopped & prio_bits; /* Check for the case of no change and return early * Otherwise update the bit and continue */ if (on) { if (cur_bits == prio_bits) { return; } mboolset(qi->stopped, prio_bits); } else { if (cur_bits == 0) { return; } mboolclr(qi->stopped, prio_bits); } /* If there is a flow control override we will not change the external * flow control state. */ if (qi->stopped & ~TXQ_STOP_FOR_PRIOFC_MASK) { return; } brcms_c_txflowcontrol_signal(wlc, qi, on, prio); } void brcms_c_txflowcontrol_override(struct brcms_c_info *wlc, struct brcms_txq_info *qi, bool on, uint override) { uint prev_override; prev_override = (qi->stopped & ~TXQ_STOP_FOR_PRIOFC_MASK); /* Update the flow control bits and do an early return if there is * no change in the external flow control state. */ if (on) { mboolset(qi->stopped, override); /* if there was a previous override bit on, then setting this * makes no difference. */ if (prev_override) { return; } brcms_c_txflowcontrol_signal(wlc, qi, ON, ALLPRIO); } else { mboolclr(qi->stopped, override); /* clearing an override bit will only make a difference for * flow control if it was the only bit set. For any other * override setting, just return */ if (prev_override != override) { return; } if (qi->stopped == 0) { brcms_c_txflowcontrol_signal(wlc, qi, OFF, ALLPRIO); } else { int prio; for (prio = MAXPRIO; prio >= 0; prio--) { if (!mboolisset(qi->stopped, NBITVAL(prio))) brcms_c_txflowcontrol_signal( wlc, qi, OFF, prio); } } } } static void brcms_c_txflowcontrol_reset(struct brcms_c_info *wlc) { struct brcms_txq_info *qi; for (qi = wlc->tx_queues; qi != NULL; qi = qi->next) { if (qi->stopped) { brcms_c_txflowcontrol_signal(wlc, qi, OFF, ALLPRIO); qi->stopped = 0; } } } static void brcms_c_txflowcontrol_signal(struct brcms_c_info *wlc, struct brcms_txq_info *qi, bool on, int prio) { #ifdef NON_FUNCTIONAL /* wlcif_list is never filled so this function is not functional */ struct brcms_c_if *wlcif; for (wlcif = wlc->wlcif_list; wlcif != NULL; wlcif = wlcif->next) { if (wlcif->qi == qi && wlcif->flags & BRCMS_IF_LINKED) brcms_txflowcontrol(wlc->wl, wlcif->wlif, on, prio); } #endif } static struct brcms_txq_info *brcms_c_txq_alloc(struct brcms_c_info *wlc) { struct brcms_txq_info *qi, *p; qi = kzalloc(sizeof(struct brcms_txq_info), GFP_ATOMIC); if (qi != NULL) { /* * Have enough room for control packets along with HI watermark * Also, add room to txq for total psq packets if all the SCBs * leave PS mode. The watermark for flowcontrol to OS packets * will remain the same */ brcmu_pktq_init(&qi->q, BRCMS_PREC_COUNT, (2 * wlc->pub->tunables->datahiwat) + PKTQ_LEN_DEFAULT + wlc->pub->psq_pkts_total); /* add this queue to the the global list */ p = wlc->tx_queues; if (p == NULL) { wlc->tx_queues = qi; } else { while (p->next != NULL) p = p->next; p->next = qi; } } return qi; } static void brcms_c_txq_free(struct brcms_c_info *wlc, struct brcms_txq_info *qi) { struct brcms_txq_info *p; if (qi == NULL) return; /* remove the queue from the linked list */ p = wlc->tx_queues; if (p == qi) wlc->tx_queues = p->next; else { while (p != NULL && p->next != qi) p = p->next; if (p != NULL) p->next = p->next->next; } kfree(qi); } /* * Flag 'scan in progress' to withhold dynamic phy calibration */ void brcms_c_scan_start(struct brcms_c_info *wlc) { wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, true); } void brcms_c_scan_stop(struct brcms_c_info *wlc) { wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, false); } void brcms_c_associate_upd(struct brcms_c_info *wlc, bool state) { wlc->pub->associated = state; wlc->cfg->associated = state; } /* * When a remote STA/AP is removed by Mac80211, or when it can no longer accept * AMPDU traffic, packets pending in hardware have to be invalidated so that * when later on hardware releases them, they can be handled appropriately. */ void brcms_c_inval_dma_pkts(struct brcms_hardware *hw, struct ieee80211_sta *sta, void (*dma_callback_fn)) { struct dma_pub *dmah; int i; for (i = 0; i < NFIFO; i++) { dmah = hw->di[i]; if (dmah != NULL) dma_walk_packets(dmah, dma_callback_fn, sta); } } int brcms_c_get_curband(struct brcms_c_info *wlc) { return wlc->band->bandunit; } void brcms_c_wait_for_tx_completion(struct brcms_c_info *wlc, bool drop) { /* flush packet queue when requested */ if (drop) brcmu_pktq_flush(&wlc->pkt_queue->q, false, NULL, NULL); /* wait for queue and DMA fifos to run dry */ while (!pktq_empty(&wlc->pkt_queue->q) || TXPKTPENDTOT(wlc) > 0) { brcms_msleep(wlc->wl, 1); } } int brcms_c_set_par(struct brcms_c_info *wlc, enum wlc_par_id par_id, int int_val) { int err = 0; switch (par_id) { case IOV_BCN_LI_BCN: wlc->bcn_li_bcn = (u8) int_val; if (wlc->pub->up) brcms_c_bcn_li_upd(wlc); break; /* As long as override is false, this only sets the *user* targets. User can twiddle this all he wants with no harm. wlc_phy_txpower_set() explicitly sets override to false if not internal or test. */ case IOV_QTXPOWER:{ u8 qdbm; bool override; /* Remove override bit and clip to max qdbm value */ qdbm = (u8)min_t(u32, (int_val & ~WL_TXPWR_OVERRIDE), 0xff); /* Extract override setting */ override = (int_val & WL_TXPWR_OVERRIDE) ? true : false; err = wlc_phy_txpower_set(wlc->band->pi, qdbm, override); break; } case IOV_MPC: wlc->mpc = (bool)int_val; brcms_c_radio_mpc_upd(wlc); break; default: err = -ENOTSUPP; } return err; } int brcms_c_get_par(struct brcms_c_info *wlc, enum wlc_par_id par_id, int *ret_int_ptr) { int err = 0; switch (par_id) { case IOV_BCN_LI_BCN: *ret_int_ptr = wlc->bcn_li_bcn; break; case IOV_QTXPOWER: { uint qdbm; bool override; err = wlc_phy_txpower_get(wlc->band->pi, &qdbm, &override); if (err != 0) return err; /* Return qdbm units */ *ret_int_ptr = qdbm | (override ? WL_TXPWR_OVERRIDE : 0); break; } case IOV_MPC: *ret_int_ptr = (s32) wlc->mpc; break; default: err = -ENOTSUPP; } return err; } /* * Search the name=value vars for a specific one and return its value. * Returns NULL if not found. */ char *getvar(char *vars, const char *name) { char *s; int len; if (!name) return NULL; len = strlen(name); if (len == 0) return NULL; /* first look in vars[] */ for (s = vars; s && *s;) { if ((memcmp(s, name, len) == 0) && (s[len] == '=')) return &s[len + 1]; while (*s++) ; } /* nothing found */ return NULL; } /* * Search the vars for a specific one and return its value as * an integer. Returns 0 if not found. */ int getintvar(char *vars, const char *name) { char *val; val = getvar(vars, name); if (val == NULL) return 0; return simple_strtoul(val, NULL, 0); }