/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *****************************************************************************/ #include #include #include #include #include #include #include "iwl-eeprom.h" #include "iwl-dev.h" /* FIXME: remove */ #include "iwl-debug.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-power.h" #include "iwl-sta.h" #include "iwl-helpers.h" /* * set bt_coex_active to true, uCode will do kill/defer * every time the priority line is asserted (BT is sending signals on the * priority line in the PCIx). * set bt_coex_active to false, uCode will ignore the BT activity and * perform the normal operation * * User might experience transmit issue on some platform due to WiFi/BT * co-exist problem. The possible behaviors are: * Able to scan and finding all the available AP * Not able to associate with any AP * On those platforms, WiFi communication can be restored by set * "bt_coex_active" module parameter to "false" * * default: bt_coex_active = true (BT_COEX_ENABLE) */ bool bt_coex_active = true; module_param(bt_coex_active, bool, S_IRUGO); MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist"); u32 iwl_debug_level; const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; /* This function both allocates and initializes hw and priv. */ struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg) { struct iwl_priv *priv; /* mac80211 allocates memory for this device instance, including * space for this driver's private structure */ struct ieee80211_hw *hw; hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), cfg->ops->ieee80211_ops); if (hw == NULL) { pr_err("%s: Can not allocate network device\n", cfg->name); goto out; } priv = hw->priv; priv->hw = hw; out: return hw; } #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */ #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */ static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv, struct ieee80211_sta_ht_cap *ht_info, enum ieee80211_band band) { u16 max_bit_rate = 0; u8 rx_chains_num = priv->hw_params.rx_chains_num; u8 tx_chains_num = priv->hw_params.tx_chains_num; ht_info->cap = 0; memset(&ht_info->mcs, 0, sizeof(ht_info->mcs)); ht_info->ht_supported = true; if (priv->cfg->ht_params && priv->cfg->ht_params->ht_greenfield_support) ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD; ht_info->cap |= IEEE80211_HT_CAP_SGI_20; max_bit_rate = MAX_BIT_RATE_20_MHZ; if (priv->hw_params.ht40_channel & BIT(band)) { ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; ht_info->cap |= IEEE80211_HT_CAP_SGI_40; ht_info->mcs.rx_mask[4] = 0x01; max_bit_rate = MAX_BIT_RATE_40_MHZ; } if (priv->cfg->mod_params->amsdu_size_8K) ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU; ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF; if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor) ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor; ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF; if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density) ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density; ht_info->mcs.rx_mask[0] = 0xFF; if (rx_chains_num >= 2) ht_info->mcs.rx_mask[1] = 0xFF; if (rx_chains_num >= 3) ht_info->mcs.rx_mask[2] = 0xFF; /* Highest supported Rx data rate */ max_bit_rate *= rx_chains_num; WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK); ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate); /* Tx MCS capabilities */ ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; if (tx_chains_num != rx_chains_num) { ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF; ht_info->mcs.tx_params |= ((tx_chains_num - 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT); } } /** * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom */ int iwlcore_init_geos(struct iwl_priv *priv) { struct iwl_channel_info *ch; struct ieee80211_supported_band *sband; struct ieee80211_channel *channels; struct ieee80211_channel *geo_ch; struct ieee80211_rate *rates; int i = 0; if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates || priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) { IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n"); set_bit(STATUS_GEO_CONFIGURED, &priv->status); return 0; } channels = kzalloc(sizeof(struct ieee80211_channel) * priv->channel_count, GFP_KERNEL); if (!channels) return -ENOMEM; rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY), GFP_KERNEL); if (!rates) { kfree(channels); return -ENOMEM; } /* 5.2GHz channels start after the 2.4GHz channels */ sband = &priv->bands[IEEE80211_BAND_5GHZ]; sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)]; /* just OFDM */ sband->bitrates = &rates[IWL_FIRST_OFDM_RATE]; sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE; if (priv->cfg->sku & IWL_SKU_N) iwlcore_init_ht_hw_capab(priv, &sband->ht_cap, IEEE80211_BAND_5GHZ); sband = &priv->bands[IEEE80211_BAND_2GHZ]; sband->channels = channels; /* OFDM & CCK */ sband->bitrates = rates; sband->n_bitrates = IWL_RATE_COUNT_LEGACY; if (priv->cfg->sku & IWL_SKU_N) iwlcore_init_ht_hw_capab(priv, &sband->ht_cap, IEEE80211_BAND_2GHZ); priv->ieee_channels = channels; priv->ieee_rates = rates; for (i = 0; i < priv->channel_count; i++) { ch = &priv->channel_info[i]; /* FIXME: might be removed if scan is OK */ if (!is_channel_valid(ch)) continue; sband = &priv->bands[ch->band]; geo_ch = &sband->channels[sband->n_channels++]; geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel, ch->band); geo_ch->max_power = ch->max_power_avg; geo_ch->max_antenna_gain = 0xff; geo_ch->hw_value = ch->channel; if (is_channel_valid(ch)) { if (!(ch->flags & EEPROM_CHANNEL_IBSS)) geo_ch->flags |= IEEE80211_CHAN_NO_IBSS; if (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN; if (ch->flags & EEPROM_CHANNEL_RADAR) geo_ch->flags |= IEEE80211_CHAN_RADAR; geo_ch->flags |= ch->ht40_extension_channel; if (ch->max_power_avg > priv->tx_power_device_lmt) priv->tx_power_device_lmt = ch->max_power_avg; } else { geo_ch->flags |= IEEE80211_CHAN_DISABLED; } IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel, geo_ch->center_freq, is_channel_a_band(ch) ? "5.2" : "2.4", geo_ch->flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid", geo_ch->flags); } if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && priv->cfg->sku & IWL_SKU_A) { IWL_INFO(priv, "Incorrectly detected BG card as ABG. " "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n", priv->pci_dev->device, priv->pci_dev->subsystem_device); priv->cfg->sku &= ~IWL_SKU_A; } IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n", priv->bands[IEEE80211_BAND_2GHZ].n_channels, priv->bands[IEEE80211_BAND_5GHZ].n_channels); set_bit(STATUS_GEO_CONFIGURED, &priv->status); return 0; } /* * iwlcore_free_geos - undo allocations in iwlcore_init_geos */ void iwlcore_free_geos(struct iwl_priv *priv) { kfree(priv->ieee_channels); kfree(priv->ieee_rates); clear_bit(STATUS_GEO_CONFIGURED, &priv->status); } static bool iwl_is_channel_extension(struct iwl_priv *priv, enum ieee80211_band band, u16 channel, u8 extension_chan_offset) { const struct iwl_channel_info *ch_info; ch_info = iwl_get_channel_info(priv, band, channel); if (!is_channel_valid(ch_info)) return false; if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) return !(ch_info->ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS); else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) return !(ch_info->ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS); return false; } bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_sta_ht_cap *ht_cap) { if (!ctx->ht.enabled || !ctx->ht.is_40mhz) return false; /* * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40 * the bit will not set if it is pure 40MHz case */ if (ht_cap && !ht_cap->ht_supported) return false; #ifdef CONFIG_IWLWIFI_DEBUGFS if (priv->disable_ht40) return false; #endif return iwl_is_channel_extension(priv, priv->band, le16_to_cpu(ctx->staging.channel), ctx->ht.extension_chan_offset); } static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val) { u16 new_val; u16 beacon_factor; /* * If mac80211 hasn't given us a beacon interval, program * the default into the device (not checking this here * would cause the adjustment below to return the maximum * value, which may break PAN.) */ if (!beacon_val) return DEFAULT_BEACON_INTERVAL; /* * If the beacon interval we obtained from the peer * is too large, we'll have to wake up more often * (and in IBSS case, we'll beacon too much) * * For example, if max_beacon_val is 4096, and the * requested beacon interval is 7000, we'll have to * use 3500 to be able to wake up on the beacons. * * This could badly influence beacon detection stats. */ beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val; new_val = beacon_val / beacon_factor; if (!new_val) new_val = max_beacon_val; return new_val; } int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { u64 tsf; s32 interval_tm, rem; struct ieee80211_conf *conf = NULL; u16 beacon_int; struct ieee80211_vif *vif = ctx->vif; conf = ieee80211_get_hw_conf(priv->hw); lockdep_assert_held(&priv->mutex); memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd)); ctx->timing.timestamp = cpu_to_le64(priv->timestamp); ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval); beacon_int = vif ? vif->bss_conf.beacon_int : 0; /* * TODO: For IBSS we need to get atim_window from mac80211, * for now just always use 0 */ ctx->timing.atim_window = 0; if (ctx->ctxid == IWL_RXON_CTX_PAN && (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) && iwl_is_associated(priv, IWL_RXON_CTX_BSS) && priv->contexts[IWL_RXON_CTX_BSS].vif && priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) { ctx->timing.beacon_interval = priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval; beacon_int = le16_to_cpu(ctx->timing.beacon_interval); } else if (ctx->ctxid == IWL_RXON_CTX_BSS && iwl_is_associated(priv, IWL_RXON_CTX_PAN) && priv->contexts[IWL_RXON_CTX_PAN].vif && priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int && (!iwl_is_associated_ctx(ctx) || !ctx->vif || !ctx->vif->bss_conf.beacon_int)) { ctx->timing.beacon_interval = priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval; beacon_int = le16_to_cpu(ctx->timing.beacon_interval); } else { beacon_int = iwl_adjust_beacon_interval(beacon_int, priv->hw_params.max_beacon_itrvl * TIME_UNIT); ctx->timing.beacon_interval = cpu_to_le16(beacon_int); } tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */ interval_tm = beacon_int * TIME_UNIT; rem = do_div(tsf, interval_tm); ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem); ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1; IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n", le16_to_cpu(ctx->timing.beacon_interval), le32_to_cpu(ctx->timing.beacon_init_val), le16_to_cpu(ctx->timing.atim_window)); return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd, sizeof(ctx->timing), &ctx->timing); } void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx, int hw_decrypt) { struct iwl_rxon_cmd *rxon = &ctx->staging; if (hw_decrypt) rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; else rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; } /* validate RXON structure is valid */ int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct iwl_rxon_cmd *rxon = &ctx->staging; bool error = false; if (rxon->flags & RXON_FLG_BAND_24G_MSK) { if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) { IWL_WARN(priv, "check 2.4G: wrong narrow\n"); error = true; } if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) { IWL_WARN(priv, "check 2.4G: wrong radar\n"); error = true; } } else { if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) { IWL_WARN(priv, "check 5.2G: not short slot!\n"); error = true; } if (rxon->flags & RXON_FLG_CCK_MSK) { IWL_WARN(priv, "check 5.2G: CCK!\n"); error = true; } } if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) { IWL_WARN(priv, "mac/bssid mcast!\n"); error = true; } /* make sure basic rates 6Mbps and 1Mbps are supported */ if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 && (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) { IWL_WARN(priv, "neither 1 nor 6 are basic\n"); error = true; } if (le16_to_cpu(rxon->assoc_id) > 2007) { IWL_WARN(priv, "aid > 2007\n"); error = true; } if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) { IWL_WARN(priv, "CCK and short slot\n"); error = true; } if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) { IWL_WARN(priv, "CCK and auto detect"); error = true; } if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK) { IWL_WARN(priv, "TGg but no auto-detect\n"); error = true; } if (error) IWL_WARN(priv, "Tuning to channel %d\n", le16_to_cpu(rxon->channel)); if (error) { IWL_ERR(priv, "Invalid RXON\n"); return -EINVAL; } return 0; } /** * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed * @priv: staging_rxon is compared to active_rxon * * If the RXON structure is changing enough to require a new tune, * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required. */ int iwl_full_rxon_required(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { const struct iwl_rxon_cmd *staging = &ctx->staging; const struct iwl_rxon_cmd *active = &ctx->active; #define CHK(cond) \ if ((cond)) { \ IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \ return 1; \ } #define CHK_NEQ(c1, c2) \ if ((c1) != (c2)) { \ IWL_DEBUG_INFO(priv, "need full RXON - " \ #c1 " != " #c2 " - %d != %d\n", \ (c1), (c2)); \ return 1; \ } /* These items are only settable from the full RXON command */ CHK(!iwl_is_associated_ctx(ctx)); CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr)); CHK(compare_ether_addr(staging->node_addr, active->node_addr)); CHK(compare_ether_addr(staging->wlap_bssid_addr, active->wlap_bssid_addr)); CHK_NEQ(staging->dev_type, active->dev_type); CHK_NEQ(staging->channel, active->channel); CHK_NEQ(staging->air_propagation, active->air_propagation); CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates, active->ofdm_ht_single_stream_basic_rates); CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates, active->ofdm_ht_dual_stream_basic_rates); CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates, active->ofdm_ht_triple_stream_basic_rates); CHK_NEQ(staging->assoc_id, active->assoc_id); /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can * be updated with the RXON_ASSOC command -- however only some * flag transitions are allowed using RXON_ASSOC */ /* Check if we are not switching bands */ CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK, active->flags & RXON_FLG_BAND_24G_MSK); /* Check if we are switching association toggle */ CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK, active->filter_flags & RXON_FILTER_ASSOC_MSK); #undef CHK #undef CHK_NEQ return 0; } u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { /* * Assign the lowest rate -- should really get this from * the beacon skb from mac80211. */ if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) return IWL_RATE_1M_PLCP; else return IWL_RATE_6M_PLCP; } static void _iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf, struct iwl_rxon_context *ctx) { struct iwl_rxon_cmd *rxon = &ctx->staging; if (!ctx->ht.enabled) { rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK | RXON_FLG_HT_PROT_MSK); return; } /* FIXME: if the definition of ht.protection changed, the "translation" * will be needed for rxon->flags */ rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS); /* Set up channel bandwidth: * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */ /* clear the HT channel mode before set the mode */ rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) { /* pure ht40 */ if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) { rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40; /* Note: control channel is opposite of extension channel */ switch (ctx->ht.extension_chan_offset) { case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; break; case IEEE80211_HT_PARAM_CHA_SEC_BELOW: rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; break; } } else { /* Note: control channel is opposite of extension channel */ switch (ctx->ht.extension_chan_offset) { case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; break; case IEEE80211_HT_PARAM_CHA_SEC_BELOW: rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; break; case IEEE80211_HT_PARAM_CHA_SEC_NONE: default: /* channel location only valid if in Mixed mode */ IWL_ERR(priv, "invalid extension channel offset\n"); break; } } } else { rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY; } if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx); IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X " "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags), ctx->ht.protection, ctx->ht.extension_chan_offset); } void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf) { struct iwl_rxon_context *ctx; for_each_context(priv, ctx) _iwl_set_rxon_ht(priv, ht_conf, ctx); } /* Return valid, unused, channel for a passive scan to reset the RF */ u8 iwl_get_single_channel_number(struct iwl_priv *priv, enum ieee80211_band band) { const struct iwl_channel_info *ch_info; int i; u8 channel = 0; u8 min, max; struct iwl_rxon_context *ctx; if (band == IEEE80211_BAND_5GHZ) { min = 14; max = priv->channel_count; } else { min = 0; max = 14; } for (i = min; i < max; i++) { bool busy = false; for_each_context(priv, ctx) { busy = priv->channel_info[i].channel == le16_to_cpu(ctx->staging.channel); if (busy) break; } if (busy) continue; channel = priv->channel_info[i].channel; ch_info = iwl_get_channel_info(priv, band, channel); if (is_channel_valid(ch_info)) break; } return channel; } /** * iwl_set_rxon_channel - Set the band and channel values in staging RXON * @ch: requested channel as a pointer to struct ieee80211_channel * NOTE: Does not commit to the hardware; it sets appropriate bit fields * in the staging RXON flag structure based on the ch->band */ int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch, struct iwl_rxon_context *ctx) { enum ieee80211_band band = ch->band; u16 channel = ch->hw_value; if ((le16_to_cpu(ctx->staging.channel) == channel) && (priv->band == band)) return 0; ctx->staging.channel = cpu_to_le16(channel); if (band == IEEE80211_BAND_5GHZ) ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK; else ctx->staging.flags |= RXON_FLG_BAND_24G_MSK; priv->band = band; IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band); return 0; } void iwl_set_flags_for_band(struct iwl_priv *priv, struct iwl_rxon_context *ctx, enum ieee80211_band band, struct ieee80211_vif *vif) { if (band == IEEE80211_BAND_5GHZ) { ctx->staging.flags &= ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_CCK_MSK); ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; } else { /* Copied from iwl_post_associate() */ if (vif && vif->bss_conf.use_short_slot) ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; else ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; ctx->staging.flags |= RXON_FLG_BAND_24G_MSK; ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK; ctx->staging.flags &= ~RXON_FLG_CCK_MSK; } } /* * initialize rxon structure with default values from eeprom */ void iwl_connection_init_rx_config(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { const struct iwl_channel_info *ch_info; memset(&ctx->staging, 0, sizeof(ctx->staging)); if (!ctx->vif) { ctx->staging.dev_type = ctx->unused_devtype; } else switch (ctx->vif->type) { case NL80211_IFTYPE_AP: ctx->staging.dev_type = ctx->ap_devtype; break; case NL80211_IFTYPE_STATION: ctx->staging.dev_type = ctx->station_devtype; ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; break; case NL80211_IFTYPE_ADHOC: ctx->staging.dev_type = ctx->ibss_devtype; ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK; ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK; break; default: IWL_ERR(priv, "Unsupported interface type %d\n", ctx->vif->type); break; } #if 0 /* TODO: Figure out when short_preamble would be set and cache from * that */ if (!hw_to_local(priv->hw)->short_preamble) ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; else ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; #endif ch_info = iwl_get_channel_info(priv, priv->band, le16_to_cpu(ctx->active.channel)); if (!ch_info) ch_info = &priv->channel_info[0]; ctx->staging.channel = cpu_to_le16(ch_info->channel); priv->band = ch_info->band; iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif); ctx->staging.ofdm_basic_rates = (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; ctx->staging.cck_basic_rates = (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; /* clear both MIX and PURE40 mode flag */ ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40); if (ctx->vif) memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN); ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff; ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff; ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff; } void iwl_set_rate(struct iwl_priv *priv) { const struct ieee80211_supported_band *hw = NULL; struct ieee80211_rate *rate; struct iwl_rxon_context *ctx; int i; hw = iwl_get_hw_mode(priv, priv->band); if (!hw) { IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n"); return; } priv->active_rate = 0; for (i = 0; i < hw->n_bitrates; i++) { rate = &(hw->bitrates[i]); if (rate->hw_value < IWL_RATE_COUNT_LEGACY) priv->active_rate |= (1 << rate->hw_value); } IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate); for_each_context(priv, ctx) { ctx->staging.cck_basic_rates = (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; ctx->staging.ofdm_basic_rates = (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; } } void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) { /* * MULTI-FIXME * See iwl_mac_channel_switch. */ struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) ieee80211_chswitch_done(ctx->vif, is_success); } #ifdef CONFIG_IWLWIFI_DEBUG void iwl_print_rx_config_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct iwl_rxon_cmd *rxon = &ctx->staging; IWL_DEBUG_RADIO(priv, "RX CONFIG:\n"); iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags)); IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type); IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates); IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr); IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr); IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); } #endif /** * iwl_irq_handle_error - called for HW or SW error interrupt from card */ void iwl_irq_handle_error(struct iwl_priv *priv) { unsigned int reload_msec; unsigned long reload_jiffies; /* Set the FW error flag -- cleared on iwl_down */ set_bit(STATUS_FW_ERROR, &priv->status); /* Cancel currently queued command. */ clear_bit(STATUS_HCMD_ACTIVE, &priv->status); /* W/A for WiFi/WiMAX coex and WiMAX own the RF */ if (priv->cfg->internal_wimax_coex && (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) & APMS_CLK_VAL_MRB_FUNC_MODE) || (iwl_read_prph(priv, APMG_PS_CTRL_REG) & APMG_PS_CTRL_VAL_RESET_REQ))) { wake_up_interruptible(&priv->wait_command_queue); /* *Keep the restart process from trying to send host * commands by clearing the INIT status bit */ clear_bit(STATUS_READY, &priv->status); IWL_ERR(priv, "RF is used by WiMAX\n"); return; } IWL_ERR(priv, "Loaded firmware version: %s\n", priv->hw->wiphy->fw_version); priv->cfg->ops->lib->dump_nic_error_log(priv); if (priv->cfg->ops->lib->dump_csr) priv->cfg->ops->lib->dump_csr(priv); if (priv->cfg->ops->lib->dump_fh) priv->cfg->ops->lib->dump_fh(priv, NULL, false); priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false); #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) iwl_print_rx_config_cmd(priv, &priv->contexts[IWL_RXON_CTX_BSS]); #endif wake_up_interruptible(&priv->wait_command_queue); /* Keep the restart process from trying to send host * commands by clearing the INIT status bit */ clear_bit(STATUS_READY, &priv->status); /* * If firmware keep reloading, then it indicate something * serious wrong and firmware having problem to recover * from it. Instead of keep trying which will fill the syslog * and hang the system, let's just stop it */ reload_jiffies = jiffies; reload_msec = jiffies_to_msecs((long) reload_jiffies - (long) priv->reload_jiffies); priv->reload_jiffies = reload_jiffies; if (reload_msec <= IWL_MIN_RELOAD_DURATION) { priv->reload_count++; if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) { IWL_ERR(priv, "BUG_ON, Stop restarting\n"); return; } } else priv->reload_count = 0; if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG(priv, IWL_DL_FW_ERRORS, "Restarting adapter due to uCode error.\n"); if (priv->cfg->mod_params->restart_fw) queue_work(priv->workqueue, &priv->restart); } } static int iwl_apm_stop_master(struct iwl_priv *priv) { int ret = 0; /* stop device's busmaster DMA activity */ iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED, CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); if (ret) IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n"); IWL_DEBUG_INFO(priv, "stop master\n"); return ret; } void iwl_apm_stop(struct iwl_priv *priv) { IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n"); /* Stop device's DMA activity */ iwl_apm_stop_master(priv); /* Reset the entire device */ iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); udelay(10); /* * Clear "initialization complete" bit to move adapter from * D0A* (powered-up Active) --> D0U* (Uninitialized) state. */ iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); } /* * Start up NIC's basic functionality after it has been reset * (e.g. after platform boot, or shutdown via iwl_apm_stop()) * NOTE: This does not load uCode nor start the embedded processor */ int iwl_apm_init(struct iwl_priv *priv) { int ret = 0; u16 lctl; IWL_DEBUG_INFO(priv, "Init card's basic functions\n"); /* * Use "set_bit" below rather than "write", to preserve any hardware * bits already set by default after reset. */ /* Disable L0S exit timer (platform NMI Work/Around) */ iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); /* * Disable L0s without affecting L1; * don't wait for ICH L0s (ICH bug W/A) */ iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); /* Set FH wait threshold to maximum (HW error during stress W/A) */ iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); /* * Enable HAP INTA (interrupt from management bus) to * wake device's PCI Express link L1a -> L0s * NOTE: This is no-op for 3945 (non-existent bit) */ iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); /* * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition. * Check if BIOS (or OS) enabled L1-ASPM on this device. * If so (likely), disable L0S, so device moves directly L0->L1; * costs negligible amount of power savings. * If not (unlikely), enable L0S, so there is at least some * power savings, even without L1. */ if (priv->cfg->base_params->set_l0s) { lctl = iwl_pcie_link_ctl(priv); if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == PCI_CFG_LINK_CTRL_VAL_L1_EN) { /* L1-ASPM enabled; disable(!) L0S */ iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n"); } else { /* L1-ASPM disabled; enable(!) L0S */ iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n"); } } /* Configure analog phase-lock-loop before activating to D0A */ if (priv->cfg->base_params->pll_cfg_val) iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->base_params->pll_cfg_val); /* * Set "initialization complete" bit to move adapter from * D0U* --> D0A* (powered-up active) state. */ iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); /* * Wait for clock stabilization; once stabilized, access to * device-internal resources is supported, e.g. iwl_write_prph() * and accesses to uCode SRAM. */ ret = iwl_poll_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); if (ret < 0) { IWL_DEBUG_INFO(priv, "Failed to init the card\n"); goto out; } /* * Enable DMA and BSM (if used) clocks, wait for them to stabilize. * BSM (Boostrap State Machine) is only in 3945 and 4965; * later devices (i.e. 5000 and later) have non-volatile SRAM, * and don't need BSM to restore data after power-saving sleep. * * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits * do not disable clocks. This preserves any hardware bits already * set by default in "CLK_CTRL_REG" after reset. */ if (priv->cfg->base_params->use_bsm) iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT); else iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(20); /* Disable L1-Active */ iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG, APMG_PCIDEV_STT_VAL_L1_ACT_DIS); out: return ret; } int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force) { int ret; s8 prev_tx_power; bool defer; struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; lockdep_assert_held(&priv->mutex); if (priv->tx_power_user_lmt == tx_power && !force) return 0; if (!priv->cfg->ops->lib->send_tx_power) return -EOPNOTSUPP; if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) { IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n", tx_power, IWLAGN_TX_POWER_TARGET_POWER_MIN); return -EINVAL; } if (tx_power > priv->tx_power_device_lmt) { IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n", tx_power, priv->tx_power_device_lmt); return -EINVAL; } if (!iwl_is_ready_rf(priv)) return -EIO; /* scan complete and commit_rxon use tx_power_next value, * it always need to be updated for newest request */ priv->tx_power_next = tx_power; /* do not set tx power when scanning or channel changing */ defer = test_bit(STATUS_SCANNING, &priv->status) || memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)); if (defer && !force) { IWL_DEBUG_INFO(priv, "Deferring tx power set\n"); return 0; } prev_tx_power = priv->tx_power_user_lmt; priv->tx_power_user_lmt = tx_power; ret = priv->cfg->ops->lib->send_tx_power(priv); /* if fail to set tx_power, restore the orig. tx power */ if (ret) { priv->tx_power_user_lmt = prev_tx_power; priv->tx_power_next = prev_tx_power; } return ret; } void iwl_send_bt_config(struct iwl_priv *priv) { struct iwl_bt_cmd bt_cmd = { .lead_time = BT_LEAD_TIME_DEF, .max_kill = BT_MAX_KILL_DEF, .kill_ack_mask = 0, .kill_cts_mask = 0, }; if (!bt_coex_active) bt_cmd.flags = BT_COEX_DISABLE; else bt_cmd.flags = BT_COEX_ENABLE; priv->bt_enable_flag = bt_cmd.flags; IWL_DEBUG_INFO(priv, "BT coex %s\n", (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active"); if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(struct iwl_bt_cmd), &bt_cmd)) IWL_ERR(priv, "failed to send BT Coex Config\n"); } int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear) { struct iwl_statistics_cmd statistics_cmd = { .configuration_flags = clear ? IWL_STATS_CONF_CLEAR_STATS : 0, }; if (flags & CMD_ASYNC) return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD, sizeof(struct iwl_statistics_cmd), &statistics_cmd, NULL); else return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, sizeof(struct iwl_statistics_cmd), &statistics_cmd); } void iwl_clear_isr_stats(struct iwl_priv *priv) { memset(&priv->isr_stats, 0, sizeof(priv->isr_stats)); } int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { struct iwl_priv *priv = hw->priv; struct iwl_rxon_context *ctx; unsigned long flags; int q; IWL_DEBUG_MAC80211(priv, "enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); return -EIO; } if (queue >= AC_NUM) { IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); return 0; } q = AC_NUM - 1 - queue; spin_lock_irqsave(&priv->lock, flags); /* * MULTI-FIXME * This may need to be done per interface in nl80211/cfg80211/mac80211. */ for_each_context(priv, ctx) { ctx->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min); ctx->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max); ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; ctx->qos_data.def_qos_parm.ac[q].edca_txop = cpu_to_le16((params->txop * 32)); ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; } spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; } int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; return priv->ibss_manager == IWL_IBSS_MANAGER; } static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { iwl_connection_init_rx_config(priv, ctx); if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx); return iwlcore_commit_rxon(priv, ctx); } static int iwl_setup_interface(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct ieee80211_vif *vif = ctx->vif; int err; lockdep_assert_held(&priv->mutex); /* * This variable will be correct only when there's just * a single context, but all code using it is for hardware * that supports only one context. */ priv->iw_mode = vif->type; ctx->is_active = true; err = iwl_set_mode(priv, ctx); if (err) { if (!ctx->always_active) ctx->is_active = false; return err; } if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && vif->type == NL80211_IFTYPE_ADHOC) { /* * pretend to have high BT traffic as long as we * are operating in IBSS mode, as this will cause * the rate scaling etc. to behave as intended. */ priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; } return 0; } int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct iwl_priv *priv = hw->priv; struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; struct iwl_rxon_context *tmp, *ctx = NULL; int err; enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", viftype, vif->addr); mutex_lock(&priv->mutex); if (!iwl_is_ready_rf(priv)) { IWL_WARN(priv, "Try to add interface when device not ready\n"); err = -EINVAL; goto out; } for_each_context(priv, tmp) { u32 possible_modes = tmp->interface_modes | tmp->exclusive_interface_modes; if (tmp->vif) { /* check if this busy context is exclusive */ if (tmp->exclusive_interface_modes & BIT(tmp->vif->type)) { err = -EINVAL; goto out; } continue; } if (!(possible_modes & BIT(viftype))) continue; /* have maybe usable context w/o interface */ ctx = tmp; break; } if (!ctx) { err = -EOPNOTSUPP; goto out; } vif_priv->ctx = ctx; ctx->vif = vif; err = iwl_setup_interface(priv, ctx); if (!err) goto out; ctx->vif = NULL; priv->iw_mode = NL80211_IFTYPE_STATION; out: mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); return err; } static void iwl_teardown_interface(struct iwl_priv *priv, struct ieee80211_vif *vif, bool mode_change) { struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); lockdep_assert_held(&priv->mutex); if (priv->scan_vif == vif) { iwl_scan_cancel_timeout(priv, 200); iwl_force_scan_end(priv); } if (!mode_change) { iwl_set_mode(priv, ctx); if (!ctx->always_active) ctx->is_active = false; } /* * When removing the IBSS interface, overwrite the * BT traffic load with the stored one from the last * notification, if any. If this is a device that * doesn't implement this, this has no effect since * both values are the same and zero. */ if (vif->type == NL80211_IFTYPE_ADHOC) priv->bt_traffic_load = priv->last_bt_traffic_load; } void iwl_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct iwl_priv *priv = hw->priv; struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); WARN_ON(ctx->vif != vif); ctx->vif = NULL; iwl_teardown_interface(priv, vif, false); memset(priv->bssid, 0, ETH_ALEN); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); } int iwl_alloc_txq_mem(struct iwl_priv *priv) { if (!priv->txq) priv->txq = kzalloc( sizeof(struct iwl_tx_queue) * priv->cfg->base_params->num_of_queues, GFP_KERNEL); if (!priv->txq) { IWL_ERR(priv, "Not enough memory for txq\n"); return -ENOMEM; } return 0; } void iwl_free_txq_mem(struct iwl_priv *priv) { kfree(priv->txq); priv->txq = NULL; } #ifdef CONFIG_IWLWIFI_DEBUGFS #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES) void iwl_reset_traffic_log(struct iwl_priv *priv) { priv->tx_traffic_idx = 0; priv->rx_traffic_idx = 0; if (priv->tx_traffic) memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE); if (priv->rx_traffic) memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE); } int iwl_alloc_traffic_mem(struct iwl_priv *priv) { u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE; if (iwl_debug_level & IWL_DL_TX) { if (!priv->tx_traffic) { priv->tx_traffic = kzalloc(traffic_size, GFP_KERNEL); if (!priv->tx_traffic) return -ENOMEM; } } if (iwl_debug_level & IWL_DL_RX) { if (!priv->rx_traffic) { priv->rx_traffic = kzalloc(traffic_size, GFP_KERNEL); if (!priv->rx_traffic) return -ENOMEM; } } iwl_reset_traffic_log(priv); return 0; } void iwl_free_traffic_mem(struct iwl_priv *priv) { kfree(priv->tx_traffic); priv->tx_traffic = NULL; kfree(priv->rx_traffic); priv->rx_traffic = NULL; } void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv, u16 length, struct ieee80211_hdr *header) { __le16 fc; u16 len; if (likely(!(iwl_debug_level & IWL_DL_TX))) return; if (!priv->tx_traffic) return; fc = header->frame_control; if (ieee80211_is_data(fc)) { len = (length > IWL_TRAFFIC_ENTRY_SIZE) ? IWL_TRAFFIC_ENTRY_SIZE : length; memcpy((priv->tx_traffic + (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)), header, len); priv->tx_traffic_idx = (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES; } } void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv, u16 length, struct ieee80211_hdr *header) { __le16 fc; u16 len; if (likely(!(iwl_debug_level & IWL_DL_RX))) return; if (!priv->rx_traffic) return; fc = header->frame_control; if (ieee80211_is_data(fc)) { len = (length > IWL_TRAFFIC_ENTRY_SIZE) ? IWL_TRAFFIC_ENTRY_SIZE : length; memcpy((priv->rx_traffic + (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)), header, len); priv->rx_traffic_idx = (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES; } } const char *get_mgmt_string(int cmd) { switch (cmd) { IWL_CMD(MANAGEMENT_ASSOC_REQ); IWL_CMD(MANAGEMENT_ASSOC_RESP); IWL_CMD(MANAGEMENT_REASSOC_REQ); IWL_CMD(MANAGEMENT_REASSOC_RESP); IWL_CMD(MANAGEMENT_PROBE_REQ); IWL_CMD(MANAGEMENT_PROBE_RESP); IWL_CMD(MANAGEMENT_BEACON); IWL_CMD(MANAGEMENT_ATIM); IWL_CMD(MANAGEMENT_DISASSOC); IWL_CMD(MANAGEMENT_AUTH); IWL_CMD(MANAGEMENT_DEAUTH); IWL_CMD(MANAGEMENT_ACTION); default: return "UNKNOWN"; } } const char *get_ctrl_string(int cmd) { switch (cmd) { IWL_CMD(CONTROL_BACK_REQ); IWL_CMD(CONTROL_BACK); IWL_CMD(CONTROL_PSPOLL); IWL_CMD(CONTROL_RTS); IWL_CMD(CONTROL_CTS); IWL_CMD(CONTROL_ACK); IWL_CMD(CONTROL_CFEND); IWL_CMD(CONTROL_CFENDACK); default: return "UNKNOWN"; } } void iwl_clear_traffic_stats(struct iwl_priv *priv) { memset(&priv->tx_stats, 0, sizeof(struct traffic_stats)); memset(&priv->rx_stats, 0, sizeof(struct traffic_stats)); } /* * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass. * Use debugFs to display the rx/rx_statistics * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL * information will be recorded, but DATA pkt still will be recorded * for the reason of iwl_led.c need to control the led blinking based on * number of tx and rx data. * */ void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len) { struct traffic_stats *stats; if (is_tx) stats = &priv->tx_stats; else stats = &priv->rx_stats; if (ieee80211_is_mgmt(fc)) { switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ): stats->mgmt[MANAGEMENT_ASSOC_REQ]++; break; case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): stats->mgmt[MANAGEMENT_ASSOC_RESP]++; break; case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ): stats->mgmt[MANAGEMENT_REASSOC_REQ]++; break; case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): stats->mgmt[MANAGEMENT_REASSOC_RESP]++; break; case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): stats->mgmt[MANAGEMENT_PROBE_REQ]++; break; case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): stats->mgmt[MANAGEMENT_PROBE_RESP]++; break; case cpu_to_le16(IEEE80211_STYPE_BEACON): stats->mgmt[MANAGEMENT_BEACON]++; break; case cpu_to_le16(IEEE80211_STYPE_ATIM): stats->mgmt[MANAGEMENT_ATIM]++; break; case cpu_to_le16(IEEE80211_STYPE_DISASSOC): stats->mgmt[MANAGEMENT_DISASSOC]++; break; case cpu_to_le16(IEEE80211_STYPE_AUTH): stats->mgmt[MANAGEMENT_AUTH]++; break; case cpu_to_le16(IEEE80211_STYPE_DEAUTH): stats->mgmt[MANAGEMENT_DEAUTH]++; break; case cpu_to_le16(IEEE80211_STYPE_ACTION): stats->mgmt[MANAGEMENT_ACTION]++; break; } } else if (ieee80211_is_ctl(fc)) { switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { case cpu_to_le16(IEEE80211_STYPE_BACK_REQ): stats->ctrl[CONTROL_BACK_REQ]++; break; case cpu_to_le16(IEEE80211_STYPE_BACK): stats->ctrl[CONTROL_BACK]++; break; case cpu_to_le16(IEEE80211_STYPE_PSPOLL): stats->ctrl[CONTROL_PSPOLL]++; break; case cpu_to_le16(IEEE80211_STYPE_RTS): stats->ctrl[CONTROL_RTS]++; break; case cpu_to_le16(IEEE80211_STYPE_CTS): stats->ctrl[CONTROL_CTS]++; break; case cpu_to_le16(IEEE80211_STYPE_ACK): stats->ctrl[CONTROL_ACK]++; break; case cpu_to_le16(IEEE80211_STYPE_CFEND): stats->ctrl[CONTROL_CFEND]++; break; case cpu_to_le16(IEEE80211_STYPE_CFENDACK): stats->ctrl[CONTROL_CFENDACK]++; break; } } else { /* data */ stats->data_cnt++; stats->data_bytes += len; } } #endif static void iwl_force_rf_reset(struct iwl_priv *priv) { if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!iwl_is_any_associated(priv)) { IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n"); return; } /* * There is no easy and better way to force reset the radio, * the only known method is switching channel which will force to * reset and tune the radio. * Use internal short scan (single channel) operation to should * achieve this objective. * Driver should reset the radio when number of consecutive missed * beacon, or any other uCode error condition detected. */ IWL_DEBUG_INFO(priv, "perform radio reset.\n"); iwl_internal_short_hw_scan(priv); } int iwl_force_reset(struct iwl_priv *priv, int mode, bool external) { struct iwl_force_reset *force_reset; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return -EINVAL; if (mode >= IWL_MAX_FORCE_RESET) { IWL_DEBUG_INFO(priv, "invalid reset request.\n"); return -EINVAL; } force_reset = &priv->force_reset[mode]; force_reset->reset_request_count++; if (!external) { if (force_reset->last_force_reset_jiffies && time_after(force_reset->last_force_reset_jiffies + force_reset->reset_duration, jiffies)) { IWL_DEBUG_INFO(priv, "force reset rejected\n"); force_reset->reset_reject_count++; return -EAGAIN; } } force_reset->reset_success_count++; force_reset->last_force_reset_jiffies = jiffies; IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode); switch (mode) { case IWL_RF_RESET: iwl_force_rf_reset(priv); break; case IWL_FW_RESET: /* * if the request is from external(ex: debugfs), * then always perform the request in regardless the module * parameter setting * if the request is from internal (uCode error or driver * detect failure), then fw_restart module parameter * need to be check before performing firmware reload */ if (!external && !priv->cfg->mod_params->restart_fw) { IWL_DEBUG_INFO(priv, "Cancel firmware reload based on " "module parameter setting\n"); break; } IWL_ERR(priv, "On demand firmware reload\n"); /* Set the FW error flag -- cleared on iwl_down */ set_bit(STATUS_FW_ERROR, &priv->status); wake_up_interruptible(&priv->wait_command_queue); /* * Keep the restart process from trying to send host * commands by clearing the INIT status bit */ clear_bit(STATUS_READY, &priv->status); queue_work(priv->workqueue, &priv->restart); break; } return 0; } int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum nl80211_iftype newtype, bool newp2p) { struct iwl_priv *priv = hw->priv; struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); struct iwl_rxon_context *tmp; u32 interface_modes; int err; newtype = ieee80211_iftype_p2p(newtype, newp2p); mutex_lock(&priv->mutex); if (!ctx->vif || !iwl_is_ready_rf(priv)) { /* * Huh? But wait ... this can maybe happen when * we're in the middle of a firmware restart! */ err = -EBUSY; goto out; } interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; if (!(interface_modes & BIT(newtype))) { err = -EBUSY; goto out; } if (ctx->exclusive_interface_modes & BIT(newtype)) { for_each_context(priv, tmp) { if (ctx == tmp) continue; if (!tmp->vif) continue; /* * The current mode switch would be exclusive, but * another context is active ... refuse the switch. */ err = -EBUSY; goto out; } } /* success */ iwl_teardown_interface(priv, vif, true); vif->type = newtype; vif->p2p = newp2p; err = iwl_setup_interface(priv, ctx); WARN_ON(err); /* * We've switched internally, but submitting to the * device may have failed for some reason. Mask this * error, because otherwise mac80211 will not switch * (and set the interface type back) and we'll be * out of sync with it. */ err = 0; out: mutex_unlock(&priv->mutex); return err; } /* * On every watchdog tick we check (latest) time stamp. If it does not * change during timeout period and queue is not empty we reset firmware. */ static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt) { struct iwl_tx_queue *txq = &priv->txq[cnt]; struct iwl_queue *q = &txq->q; unsigned long timeout; int ret; if (q->read_ptr == q->write_ptr) { txq->time_stamp = jiffies; return 0; } timeout = txq->time_stamp + msecs_to_jiffies(priv->cfg->base_params->wd_timeout); if (time_after(jiffies, timeout)) { IWL_ERR(priv, "Queue %d stuck for %u ms.\n", q->id, priv->cfg->base_params->wd_timeout); ret = iwl_force_reset(priv, IWL_FW_RESET, false); return (ret == -EAGAIN) ? 0 : 1; } return 0; } /* * Making watchdog tick be a quarter of timeout assure we will * discover the queue hung between timeout and 1.25*timeout */ #define IWL_WD_TICK(timeout) ((timeout) / 4) /* * Watchdog timer callback, we check each tx queue for stuck, if if hung * we reset the firmware. If everything is fine just rearm the timer. */ void iwl_bg_watchdog(unsigned long data) { struct iwl_priv *priv = (struct iwl_priv *)data; int cnt; unsigned long timeout; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; timeout = priv->cfg->base_params->wd_timeout; if (timeout == 0) return; /* monitor and check for stuck cmd queue */ if (iwl_check_stuck_queue(priv, priv->cmd_queue)) return; /* monitor and check for other stuck queues */ if (iwl_is_any_associated(priv)) { for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) { /* skip as we already checked the command queue */ if (cnt == priv->cmd_queue) continue; if (iwl_check_stuck_queue(priv, cnt)) return; } } mod_timer(&priv->watchdog, jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout))); } void iwl_setup_watchdog(struct iwl_priv *priv) { unsigned int timeout = priv->cfg->base_params->wd_timeout; if (timeout) mod_timer(&priv->watchdog, jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout))); else del_timer(&priv->watchdog); } /* * extended beacon time format * time in usec will be changed into a 32-bit value in extended:internal format * the extended part is the beacon counts * the internal part is the time in usec within one beacon interval */ u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval) { u32 quot; u32 rem; u32 interval = beacon_interval * TIME_UNIT; if (!interval || !usec) return 0; quot = (usec / interval) & (iwl_beacon_time_mask_high(priv, priv->hw_params.beacon_time_tsf_bits) >> priv->hw_params.beacon_time_tsf_bits); rem = (usec % interval) & iwl_beacon_time_mask_low(priv, priv->hw_params.beacon_time_tsf_bits); return (quot << priv->hw_params.beacon_time_tsf_bits) + rem; } /* base is usually what we get from ucode with each received frame, * the same as HW timer counter counting down */ __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base, u32 addon, u32 beacon_interval) { u32 base_low = base & iwl_beacon_time_mask_low(priv, priv->hw_params.beacon_time_tsf_bits); u32 addon_low = addon & iwl_beacon_time_mask_low(priv, priv->hw_params.beacon_time_tsf_bits); u32 interval = beacon_interval * TIME_UNIT; u32 res = (base & iwl_beacon_time_mask_high(priv, priv->hw_params.beacon_time_tsf_bits)) + (addon & iwl_beacon_time_mask_high(priv, priv->hw_params.beacon_time_tsf_bits)); if (base_low > addon_low) res += base_low - addon_low; else if (base_low < addon_low) { res += interval + base_low - addon_low; res += (1 << priv->hw_params.beacon_time_tsf_bits); } else res += (1 << priv->hw_params.beacon_time_tsf_bits); return cpu_to_le32(res); } #ifdef CONFIG_PM int iwl_pci_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct iwl_priv *priv = pci_get_drvdata(pdev); /* * This function is called when system goes into suspend state * mac80211 will call iwl_mac_stop() from the mac80211 suspend function * first but since iwl_mac_stop() has no knowledge of who the caller is, * it will not call apm_ops.stop() to stop the DMA operation. * Calling apm_ops.stop here to make sure we stop the DMA. */ iwl_apm_stop(priv); return 0; } int iwl_pci_resume(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct iwl_priv *priv = pci_get_drvdata(pdev); bool hw_rfkill = false; /* * We disable the RETRY_TIMEOUT register (0x41) to keep * PCI Tx retries from interfering with C3 CPU state. */ pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); iwl_enable_interrupts(priv); if (!(iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) hw_rfkill = true; if (hw_rfkill) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill); return 0; } const struct dev_pm_ops iwl_pm_ops = { .suspend = iwl_pci_suspend, .resume = iwl_pci_resume, .freeze = iwl_pci_suspend, .thaw = iwl_pci_resume, .poweroff = iwl_pci_suspend, .restore = iwl_pci_resume, }; #endif /* CONFIG_PM */