/****************************************************************************** * * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * 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. * * Contact Information: * James P. Ketrenos * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-sta.h" #include "iwl-calib.h" /****************************************************************************** * * module boiler plate * ******************************************************************************/ /* * module name, copyright, version, etc. * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk */ #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux" #ifdef CONFIG_IWLWIFI_DEBUG #define VD "d" #else #define VD #endif #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT #define VS "s" #else #define VS #endif #define DRV_VERSION IWLWIFI_VERSION VD VS MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT); MODULE_LICENSE("GPL"); static const struct ieee80211_supported_band *iwl_get_hw_mode( struct iwl_priv *priv, enum ieee80211_band band) { return priv->hw->wiphy->bands[band]; } static int iwl4965_is_empty_essid(const char *essid, int essid_len) { /* Single white space is for Linksys APs */ if (essid_len == 1 && essid[0] == ' ') return 1; /* Otherwise, if the entire essid is 0, we assume it is hidden */ while (essid_len) { essid_len--; if (essid[essid_len] != '\0') return 0; } return 1; } static const char *iwl4965_escape_essid(const char *essid, u8 essid_len) { static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; const char *s = essid; char *d = escaped; if (iwl4965_is_empty_essid(essid, essid_len)) { memcpy(escaped, "", sizeof("")); return escaped; } essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); while (essid_len--) { if (*s == '\0') { *d++ = '\\'; *d++ = '0'; s++; } else *d++ = *s++; } *d = '\0'; return escaped; } /*************** STATION TABLE MANAGEMENT **** * mac80211 should be examined to determine if sta_info is duplicating * the functionality provided here */ /**************************************************************/ #if 0 /* temporary disable till we add real remove station */ /** * iwl4965_remove_station - Remove driver's knowledge of station. * * NOTE: This does not remove station from device's station table. */ static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap) { int index = IWL_INVALID_STATION; int i; unsigned long flags; spin_lock_irqsave(&priv->sta_lock, flags); if (is_ap) index = IWL_AP_ID; else if (is_broadcast_ether_addr(addr)) index = priv->hw_params.bcast_sta_id; else for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) if (priv->stations[i].used && !compare_ether_addr(priv->stations[i].sta.sta.addr, addr)) { index = i; break; } if (unlikely(index == IWL_INVALID_STATION)) goto out; if (priv->stations[index].used) { priv->stations[index].used = 0; priv->num_stations--; } BUG_ON(priv->num_stations < 0); out: spin_unlock_irqrestore(&priv->sta_lock, flags); return 0; } #endif static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt) { struct iwl_rxon_cmd *rxon = &priv->staging_rxon; if (hw_decrypt) rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; else rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; } /** * iwl4965_check_rxon_cmd - validate RXON structure is valid * * NOTE: This is really only useful during development and can eventually * be #ifdef'd out once the driver is stable and folks aren't actively * making changes */ static int iwl4965_check_rxon_cmd(struct iwl_rxon_cmd *rxon) { int error = 0; int counter = 1; if (rxon->flags & RXON_FLG_BAND_24G_MSK) { error |= le32_to_cpu(rxon->flags & (RXON_FLG_TGJ_NARROW_BAND_MSK | RXON_FLG_RADAR_DETECT_MSK)); if (error) IWL_WARNING("check 24G fields %d | %d\n", counter++, error); } else { error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ? 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK); if (error) IWL_WARNING("check 52 fields %d | %d\n", counter++, error); error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK); if (error) IWL_WARNING("check 52 CCK %d | %d\n", counter++, error); } error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1; if (error) IWL_WARNING("check mac addr %d | %d\n", counter++, error); /* make sure basic rates 6Mbps and 1Mbps are supported */ error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) && ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0)); if (error) IWL_WARNING("check basic rate %d | %d\n", counter++, error); error |= (le16_to_cpu(rxon->assoc_id) > 2007); if (error) IWL_WARNING("check assoc id %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)); if (error) IWL_WARNING("check CCK and short slot %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)); if (error) IWL_WARNING("check CCK & auto detect %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK); if (error) IWL_WARNING("check TGG and auto detect %d | %d\n", counter++, error); if (error) IWL_WARNING("Tuning to channel %d\n", le16_to_cpu(rxon->channel)); if (error) { IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n"); return -1; } return 0; } /** * iwl4965_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. */ static int iwl4965_full_rxon_required(struct iwl_priv *priv) { /* These items are only settable from the full RXON command */ if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) || compare_ether_addr(priv->staging_rxon.bssid_addr, priv->active_rxon.bssid_addr) || compare_ether_addr(priv->staging_rxon.node_addr, priv->active_rxon.node_addr) || compare_ether_addr(priv->staging_rxon.wlap_bssid_addr, priv->active_rxon.wlap_bssid_addr) || (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) || (priv->staging_rxon.channel != priv->active_rxon.channel) || (priv->staging_rxon.air_propagation != priv->active_rxon.air_propagation) || (priv->staging_rxon.ofdm_ht_single_stream_basic_rates != priv->active_rxon.ofdm_ht_single_stream_basic_rates) || (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates != priv->active_rxon.ofdm_ht_dual_stream_basic_rates) || (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) || (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id)) return 1; /* 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 */ if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) != (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)) return 1; /* Check if we are switching association toggle */ if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) != (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) return 1; return 0; } /** * iwl4965_commit_rxon - commit staging_rxon to hardware * * The RXON command in staging_rxon is committed to the hardware and * the active_rxon structure is updated with the new data. This * function correctly transitions out of the RXON_ASSOC_MSK state if * a HW tune is required based on the RXON structure changes. */ static int iwl4965_commit_rxon(struct iwl_priv *priv) { /* cast away the const for active_rxon in this function */ struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon; DECLARE_MAC_BUF(mac); int rc = 0; if (!iwl_is_alive(priv)) return -1; /* always get timestamp with Rx frame */ priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK; rc = iwl4965_check_rxon_cmd(&priv->staging_rxon); if (rc) { IWL_ERROR("Invalid RXON configuration. Not committing.\n"); return -EINVAL; } /* If we don't need to send a full RXON, we can use * iwl4965_rxon_assoc_cmd which is used to reconfigure filter * and other flags for the current radio configuration. */ if (!iwl4965_full_rxon_required(priv)) { rc = iwl_send_rxon_assoc(priv); if (rc) { IWL_ERROR("Error setting RXON_ASSOC " "configuration (%d).\n", rc); return rc; } memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); return 0; } /* station table will be cleared */ priv->assoc_station_added = 0; /* If we are currently associated and the new config requires * an RXON_ASSOC and the new config wants the associated mask enabled, * we must clear the associated from the active configuration * before we apply the new config */ if (iwl_is_associated(priv) && (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) { IWL_DEBUG_INFO("Toggling associated bit on current RXON\n"); active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; rc = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl_rxon_cmd), &priv->active_rxon); /* If the mask clearing failed then we set * active_rxon back to what it was previously */ if (rc) { active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK; IWL_ERROR("Error clearing ASSOC_MSK on current " "configuration (%d).\n", rc); return rc; } } IWL_DEBUG_INFO("Sending RXON\n" "* with%s RXON_FILTER_ASSOC_MSK\n" "* channel = %d\n" "* bssid = %s\n", ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ? "" : "out"), le16_to_cpu(priv->staging_rxon.channel), print_mac(mac, priv->staging_rxon.bssid_addr)); iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto); /* Apply the new configuration */ rc = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl_rxon_cmd), &priv->staging_rxon); if (rc) { IWL_ERROR("Error setting new configuration (%d).\n", rc); return rc; } iwlcore_clear_stations_table(priv); if (!priv->error_recovering) priv->start_calib = 0; iwl_init_sensitivity(priv); memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); /* If we issue a new RXON command which required a tune then we must * send a new TXPOWER command or we won't be able to Tx any frames */ rc = iwl4965_hw_reg_send_txpower(priv); if (rc) { IWL_ERROR("Error setting Tx power (%d).\n", rc); return rc; } /* Add the broadcast address so we can send broadcast frames */ if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) == IWL_INVALID_STATION) { IWL_ERROR("Error adding BROADCAST address for transmit.\n"); return -EIO; } /* If we have set the ASSOC_MSK and we are in BSS mode then * add the IWL_AP_ID to the station rate table */ if (iwl_is_associated(priv) && (priv->iw_mode == IEEE80211_IF_TYPE_STA)) { if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1) == IWL_INVALID_STATION) { IWL_ERROR("Error adding AP address for transmit.\n"); return -EIO; } priv->assoc_station_added = 1; if (priv->default_wep_key && iwl_send_static_wepkey_cmd(priv, 0)) IWL_ERROR("Could not send WEP static key.\n"); } return 0; } void iwl4965_update_chain_flags(struct iwl_priv *priv) { iwl_set_rxon_chain(priv); iwl4965_commit_rxon(priv); } static int iwl4965_send_bt_config(struct iwl_priv *priv) { struct iwl4965_bt_cmd bt_cmd = { .flags = 3, .lead_time = 0xAA, .max_kill = 1, .kill_ack_mask = 0, .kill_cts_mask = 0, }; return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(struct iwl4965_bt_cmd), &bt_cmd); } static int iwl4965_send_scan_abort(struct iwl_priv *priv) { int ret = 0; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SCAN_ABORT_CMD, .meta.flags = CMD_WANT_SKB, }; /* If there isn't a scan actively going on in the hardware * then we are in between scan bands and not actually * actively scanning, so don't send the abort command */ if (!test_bit(STATUS_SCAN_HW, &priv->status)) { clear_bit(STATUS_SCAN_ABORTING, &priv->status); return 0; } ret = iwl_send_cmd_sync(priv, &cmd); if (ret) { clear_bit(STATUS_SCAN_ABORTING, &priv->status); return ret; } res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->u.status != CAN_ABORT_STATUS) { /* The scan abort will return 1 for success or * 2 for "failure". A failure condition can be * due to simply not being in an active scan which * can occur if we send the scan abort before we * the microcode has notified us that a scan is * completed. */ IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status); clear_bit(STATUS_SCAN_ABORTING, &priv->status); clear_bit(STATUS_SCAN_HW, &priv->status); } dev_kfree_skb_any(cmd.meta.u.skb); return ret; } /* * CARD_STATE_CMD * * Use: Sets the device's internal card state to enable, disable, or halt * * When in the 'enable' state the card operates as normal. * When in the 'disable' state, the card enters into a low power mode. * When in the 'halt' state, the card is shut down and must be fully * restarted to come back on. */ static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag) { struct iwl_host_cmd cmd = { .id = REPLY_CARD_STATE_CMD, .len = sizeof(u32), .data = &flags, .meta.flags = meta_flag, }; return iwl_send_cmd(priv, &cmd); } static void iwl_clear_free_frames(struct iwl_priv *priv) { struct list_head *element; IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n", priv->frames_count); while (!list_empty(&priv->free_frames)) { element = priv->free_frames.next; list_del(element); kfree(list_entry(element, struct iwl_frame, list)); priv->frames_count--; } if (priv->frames_count) { IWL_WARNING("%d frames still in use. Did we lose one?\n", priv->frames_count); priv->frames_count = 0; } } static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv) { struct iwl_frame *frame; struct list_head *element; if (list_empty(&priv->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IWL_ERROR("Could not allocate frame!\n"); return NULL; } priv->frames_count++; return frame; } element = priv->free_frames.next; list_del(element); return list_entry(element, struct iwl_frame, list); } static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &priv->free_frames); } unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv, struct ieee80211_hdr *hdr, const u8 *dest, int left) { if (!iwl_is_associated(priv) || !priv->ibss_beacon || ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) && (priv->iw_mode != IEEE80211_IF_TYPE_AP))) return 0; if (priv->ibss_beacon->len > left) return 0; memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len); return priv->ibss_beacon->len; } static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv) { int i; int rate_mask; /* Set rate mask*/ if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) rate_mask = priv->active_rate_basic & 0xF; else rate_mask = priv->active_rate_basic & 0xFF0; /* Find lowest valid rate */ for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID; i = iwl_rates[i].next_ieee) { if (rate_mask & (1 << i)) return iwl_rates[i].plcp; } /* No valid rate was found. Assign the lowest one */ if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) return IWL_RATE_1M_PLCP; else return IWL_RATE_6M_PLCP; } static int iwl4965_send_beacon_cmd(struct iwl_priv *priv) { struct iwl_frame *frame; unsigned int frame_size; int rc; u8 rate; frame = iwl_get_free_frame(priv); if (!frame) { IWL_ERROR("Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } rate = iwl4965_rate_get_lowest_plcp(priv); frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate); rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, &frame->u.cmd[0]); iwl_free_frame(priv, frame); return rc; } /****************************************************************************** * * Misc. internal state and helper functions * ******************************************************************************/ /** * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field * * return : set the bit for each supported rate insert in ie */ static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate, u16 basic_rate, int *left) { u16 ret_rates = 0, bit; int i; u8 *cnt = ie; u8 *rates = ie + 1; for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) { if (bit & supported_rate) { ret_rates |= bit; rates[*cnt] = iwl_rates[i].ieee | ((bit & basic_rate) ? 0x80 : 0x00); (*cnt)++; (*left)--; if ((*left <= 0) || (*cnt >= IWL_SUPPORTED_RATES_IE_LEN)) break; } } return ret_rates; } #ifdef CONFIG_IWL4965_HT static void iwl4965_ht_conf(struct iwl_priv *priv, struct ieee80211_bss_conf *bss_conf) { struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf; struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf; struct iwl_ht_info *iwl_conf = &priv->current_ht_config; IWL_DEBUG_MAC80211("enter: \n"); iwl_conf->is_ht = bss_conf->assoc_ht; if (!iwl_conf->is_ht) return; priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2); if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20) iwl_conf->sgf |= HT_SHORT_GI_20MHZ; if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40) iwl_conf->sgf |= HT_SHORT_GI_40MHZ; iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD); iwl_conf->max_amsdu_size = !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU); iwl_conf->supported_chan_width = !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH); iwl_conf->extension_chan_offset = ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET; /* If no above or below channel supplied disable FAT channel */ if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE && iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW) iwl_conf->supported_chan_width = 0; iwl_conf->tx_mimo_ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2); memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16); iwl_conf->control_channel = ht_bss_conf->primary_channel; iwl_conf->tx_chan_width = !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH); iwl_conf->ht_protection = ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION; iwl_conf->non_GF_STA_present = !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT); IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel); IWL_DEBUG_MAC80211("leave\n"); } static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband, u8 *pos, int *left) { struct ieee80211_ht_cap *ht_cap; if (!sband || !sband->ht_info.ht_supported) return; if (*left < sizeof(struct ieee80211_ht_cap)) return; *pos++ = sizeof(struct ieee80211_ht_cap); ht_cap = (struct ieee80211_ht_cap *) pos; ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap); memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16); ht_cap->ampdu_params_info = (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) | ((sband->ht_info.ampdu_density << 2) & IEEE80211_HT_CAP_AMPDU_DENSITY); *left -= sizeof(struct ieee80211_ht_cap); } #else static inline void iwl4965_ht_conf(struct iwl_priv *priv, struct ieee80211_bss_conf *bss_conf) { } static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband, u8 *pos, int *left) { } #endif /** * iwl4965_fill_probe_req - fill in all required fields and IE for probe request */ static u16 iwl4965_fill_probe_req(struct iwl_priv *priv, enum ieee80211_band band, struct ieee80211_mgmt *frame, int left, int is_direct) { int len = 0; u8 *pos = NULL; u16 active_rates, ret_rates, cck_rates, active_rate_basic; const struct ieee80211_supported_band *sband = iwl_get_hw_mode(priv, band); /* Make sure there is enough space for the probe request, * two mandatory IEs and the data */ left -= 24; if (left < 0) return 0; len += 24; frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); memcpy(frame->da, iwl_bcast_addr, ETH_ALEN); memcpy(frame->sa, priv->mac_addr, ETH_ALEN); memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN); frame->seq_ctrl = 0; /* fill in our indirect SSID IE */ /* ...next IE... */ left -= 2; if (left < 0) return 0; len += 2; pos = &(frame->u.probe_req.variable[0]); *pos++ = WLAN_EID_SSID; *pos++ = 0; /* fill in our direct SSID IE... */ if (is_direct) { /* ...next IE... */ left -= 2 + priv->essid_len; if (left < 0) return 0; /* ... fill it in... */ *pos++ = WLAN_EID_SSID; *pos++ = priv->essid_len; memcpy(pos, priv->essid, priv->essid_len); pos += priv->essid_len; len += 2 + priv->essid_len; } /* fill in supported rate */ /* ...next IE... */ left -= 2; if (left < 0) return 0; /* ... fill it in... */ *pos++ = WLAN_EID_SUPP_RATES; *pos = 0; /* exclude 60M rate */ active_rates = priv->rates_mask; active_rates &= ~IWL_RATE_60M_MASK; active_rate_basic = active_rates & IWL_BASIC_RATES_MASK; cck_rates = IWL_CCK_RATES_MASK & active_rates; ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates, active_rate_basic, &left); active_rates &= ~ret_rates; ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left); active_rates &= ~ret_rates; len += 2 + *pos; pos += (*pos) + 1; if (active_rates == 0) goto fill_end; /* fill in supported extended rate */ /* ...next IE... */ left -= 2; if (left < 0) return 0; /* ... fill it in... */ *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos = 0; iwl4965_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left); if (*pos > 0) len += 2 + *pos; fill_end: /* fill in HT IE */ left -= 2; if (left < 0) return 0; *pos++ = WLAN_EID_HT_CAPABILITY; *pos = 0; iwl_ht_cap_to_ie(sband, pos, &left); if (*pos > 0) len += 2 + *pos; return (u16)len; } /* * QoS support */ static int iwl4965_send_qos_params_command(struct iwl_priv *priv, struct iwl4965_qosparam_cmd *qos) { return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM, sizeof(struct iwl4965_qosparam_cmd), qos); } static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force) { unsigned long flags; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!priv->qos_data.qos_enable) return; spin_lock_irqsave(&priv->lock, flags); priv->qos_data.def_qos_parm.qos_flags = 0; if (priv->qos_data.qos_cap.q_AP.queue_request && !priv->qos_data.qos_cap.q_AP.txop_request) priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TXOP_TYPE_MSK; if (priv->qos_data.qos_active) priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_UPDATE_EDCA_MSK; #ifdef CONFIG_IWL4965_HT if (priv->current_ht_config.is_ht) priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK; #endif /* CONFIG_IWL4965_HT */ spin_unlock_irqrestore(&priv->lock, flags); if (force || iwl_is_associated(priv)) { IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n", priv->qos_data.qos_active, priv->qos_data.def_qos_parm.qos_flags); iwl4965_send_qos_params_command(priv, &(priv->qos_data.def_qos_parm)); } } int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header) { /* Filter incoming packets to determine if they are targeted toward * this network, discarding packets coming from ourselves */ switch (priv->iw_mode) { case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */ /* packets from our adapter are dropped (echo) */ if (!compare_ether_addr(header->addr2, priv->mac_addr)) return 0; /* {broad,multi}cast packets to our IBSS go through */ if (is_multicast_ether_addr(header->addr1)) return !compare_ether_addr(header->addr3, priv->bssid); /* packets to our adapter go through */ return !compare_ether_addr(header->addr1, priv->mac_addr); case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */ /* packets from our adapter are dropped (echo) */ if (!compare_ether_addr(header->addr3, priv->mac_addr)) return 0; /* {broad,multi}cast packets to our BSS go through */ if (is_multicast_ether_addr(header->addr1)) return !compare_ether_addr(header->addr2, priv->bssid); /* packets to our adapter go through */ return !compare_ether_addr(header->addr1, priv->mac_addr); default: break; } return 1; } #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x static const char *iwl4965_get_tx_fail_reason(u32 status) { switch (status & TX_STATUS_MSK) { case TX_STATUS_SUCCESS: return "SUCCESS"; TX_STATUS_ENTRY(SHORT_LIMIT); TX_STATUS_ENTRY(LONG_LIMIT); TX_STATUS_ENTRY(FIFO_UNDERRUN); TX_STATUS_ENTRY(MGMNT_ABORT); TX_STATUS_ENTRY(NEXT_FRAG); TX_STATUS_ENTRY(LIFE_EXPIRE); TX_STATUS_ENTRY(DEST_PS); TX_STATUS_ENTRY(ABORTED); TX_STATUS_ENTRY(BT_RETRY); TX_STATUS_ENTRY(STA_INVALID); TX_STATUS_ENTRY(FRAG_DROPPED); TX_STATUS_ENTRY(TID_DISABLE); TX_STATUS_ENTRY(FRAME_FLUSHED); TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL); TX_STATUS_ENTRY(TX_LOCKED); TX_STATUS_ENTRY(NO_BEACON_ON_RADAR); } return "UNKNOWN"; } /** * iwl4965_scan_cancel - Cancel any currently executing HW scan * * NOTE: priv->mutex is not required before calling this function */ static int iwl4965_scan_cancel(struct iwl_priv *priv) { if (!test_bit(STATUS_SCAN_HW, &priv->status)) { clear_bit(STATUS_SCANNING, &priv->status); return 0; } if (test_bit(STATUS_SCANNING, &priv->status)) { if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_SCAN("Queuing scan abort.\n"); set_bit(STATUS_SCAN_ABORTING, &priv->status); queue_work(priv->workqueue, &priv->abort_scan); } else IWL_DEBUG_SCAN("Scan abort already in progress.\n"); return test_bit(STATUS_SCANNING, &priv->status); } return 0; } /** * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan * @ms: amount of time to wait (in milliseconds) for scan to abort * * NOTE: priv->mutex must be held before calling this function */ static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms) { unsigned long now = jiffies; int ret; ret = iwl4965_scan_cancel(priv); if (ret && ms) { mutex_unlock(&priv->mutex); while (!time_after(jiffies, now + msecs_to_jiffies(ms)) && test_bit(STATUS_SCANNING, &priv->status)) msleep(1); mutex_lock(&priv->mutex); return test_bit(STATUS_SCANNING, &priv->status); } return ret; } static void iwl4965_sequence_reset(struct iwl_priv *priv) { /* Reset ieee stats */ /* We don't reset the net_device_stats (ieee->stats) on * re-association */ priv->last_seq_num = -1; priv->last_frag_num = -1; priv->last_packet_time = 0; iwl4965_scan_cancel(priv); } #define MAX_UCODE_BEACON_INTERVAL 4096 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA) static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val) { u16 new_val = 0; u16 beacon_factor = 0; beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL) / MAX_UCODE_BEACON_INTERVAL; new_val = beacon_val / beacon_factor; return cpu_to_le16(new_val); } static void iwl4965_setup_rxon_timing(struct iwl_priv *priv) { u64 interval_tm_unit; u64 tsf, result; unsigned long flags; struct ieee80211_conf *conf = NULL; u16 beacon_int = 0; conf = ieee80211_get_hw_conf(priv->hw); spin_lock_irqsave(&priv->lock, flags); priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32); priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp & 0xFFFFFFFF); priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL; tsf = priv->timestamp; beacon_int = priv->beacon_int; spin_unlock_irqrestore(&priv->lock, flags); if (priv->iw_mode == IEEE80211_IF_TYPE_STA) { if (beacon_int == 0) { priv->rxon_timing.beacon_interval = cpu_to_le16(100); priv->rxon_timing.beacon_init_val = cpu_to_le32(102400); } else { priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int); priv->rxon_timing.beacon_interval = iwl4965_adjust_beacon_interval( le16_to_cpu(priv->rxon_timing.beacon_interval)); } priv->rxon_timing.atim_window = 0; } else { priv->rxon_timing.beacon_interval = iwl4965_adjust_beacon_interval(conf->beacon_int); /* TODO: we need to get atim_window from upper stack * for now we set to 0 */ priv->rxon_timing.atim_window = 0; } interval_tm_unit = (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024); result = do_div(tsf, interval_tm_unit); priv->rxon_timing.beacon_init_val = cpu_to_le32((u32) ((u64) interval_tm_unit - result)); IWL_DEBUG_ASSOC ("beacon interval %d beacon timer %d beacon tim %d\n", le16_to_cpu(priv->rxon_timing.beacon_interval), le32_to_cpu(priv->rxon_timing.beacon_init_val), le16_to_cpu(priv->rxon_timing.atim_window)); } static int iwl4965_scan_initiate(struct iwl_priv *priv) { if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { IWL_ERROR("APs don't scan.\n"); return 0; } if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_SCAN("Aborting scan due to not ready.\n"); return -EIO; } if (test_bit(STATUS_SCANNING, &priv->status)) { IWL_DEBUG_SCAN("Scan already in progress.\n"); return -EAGAIN; } if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_SCAN("Scan request while abort pending. " "Queuing.\n"); return -EAGAIN; } IWL_DEBUG_INFO("Starting scan...\n"); priv->scan_bands = 2; set_bit(STATUS_SCANNING, &priv->status); priv->scan_start = jiffies; priv->scan_pass_start = priv->scan_start; queue_work(priv->workqueue, &priv->request_scan); return 0; } static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv, enum ieee80211_band band) { if (band == IEEE80211_BAND_5GHZ) { priv->staging_rxon.flags &= ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_CCK_MSK); priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; } else { /* Copied from iwl4965_post_associate() */ if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK; priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK; priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK; } } /* * initialize rxon structure with default values from eeprom */ static void iwl4965_connection_init_rx_config(struct iwl_priv *priv) { const struct iwl_channel_info *ch_info; memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon)); switch (priv->iw_mode) { case IEEE80211_IF_TYPE_AP: priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP; break; case IEEE80211_IF_TYPE_STA: priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS; priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; break; case IEEE80211_IF_TYPE_IBSS: priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS; priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK; priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK; break; case IEEE80211_IF_TYPE_MNTR: priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER; priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK | RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK; break; default: IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode); break; } #if 0 /* TODO: Figure out when short_preamble would be set and cache from * that */ if (!hw_to_local(priv->hw)->short_preamble) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; #endif ch_info = iwl_get_channel_info(priv, priv->band, le16_to_cpu(priv->staging_rxon.channel)); if (!ch_info) ch_info = &priv->channel_info[0]; /* * in some case A channels are all non IBSS * in this case force B/G channel */ if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !(is_channel_ibss(ch_info))) ch_info = &priv->channel_info[0]; priv->staging_rxon.channel = cpu_to_le16(ch_info->channel); priv->band = ch_info->band; iwl4965_set_flags_for_phymode(priv, priv->band); priv->staging_rxon.ofdm_basic_rates = (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; priv->staging_rxon.cck_basic_rates = (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK | RXON_FLG_CHANNEL_MODE_PURE_40_MSK); memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN); priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff; priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff; iwl_set_rxon_chain(priv); } static int iwl4965_set_mode(struct iwl_priv *priv, int mode) { if (mode == IEEE80211_IF_TYPE_IBSS) { const struct iwl_channel_info *ch_info; ch_info = iwl_get_channel_info(priv, priv->band, le16_to_cpu(priv->staging_rxon.channel)); if (!ch_info || !is_channel_ibss(ch_info)) { IWL_ERROR("channel %d not IBSS channel\n", le16_to_cpu(priv->staging_rxon.channel)); return -EINVAL; } } priv->iw_mode = mode; iwl4965_connection_init_rx_config(priv); memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); iwlcore_clear_stations_table(priv); /* dont commit rxon if rf-kill is on*/ if (!iwl_is_ready_rf(priv)) return -EAGAIN; cancel_delayed_work(&priv->scan_check); if (iwl4965_scan_cancel_timeout(priv, 100)) { IWL_WARNING("Aborted scan still in progress after 100ms\n"); IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); return -EAGAIN; } iwl4965_commit_rxon(priv); return 0; } static void iwl4965_set_rate(struct iwl_priv *priv) { const struct ieee80211_supported_band *hw = NULL; struct ieee80211_rate *rate; int i; hw = iwl_get_hw_mode(priv, priv->band); if (!hw) { IWL_ERROR("Failed to set rate: unable to get hw mode\n"); return; } priv->active_rate = 0; priv->active_rate_basic = 0; for (i = 0; i < hw->n_bitrates; i++) { rate = &(hw->bitrates[i]); if (rate->hw_value < IWL_RATE_COUNT) priv->active_rate |= (1 << rate->hw_value); } IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n", priv->active_rate, priv->active_rate_basic); /* * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK) * otherwise set it to the default of all CCK rates and 6, 12, 24 for * OFDM */ if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK) priv->staging_rxon.cck_basic_rates = ((priv->active_rate_basic & IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF; else priv->staging_rxon.cck_basic_rates = (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK) priv->staging_rxon.ofdm_basic_rates = ((priv->active_rate_basic & (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >> IWL_FIRST_OFDM_RATE) & 0xFF; else priv->staging_rxon.ofdm_basic_rates = (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; } void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio) { unsigned long flags; if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status)) return; IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n", disable_radio ? "OFF" : "ON"); if (disable_radio) { iwl4965_scan_cancel(priv); /* FIXME: This is a workaround for AP */ if (priv->iw_mode != IEEE80211_IF_TYPE_AP) { spin_lock_irqsave(&priv->lock, flags); iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_SW_BIT_RFKILL); spin_unlock_irqrestore(&priv->lock, flags); /* call the host command only if no hw rf-kill set */ if (!test_bit(STATUS_RF_KILL_HW, &priv->status) && iwl_is_ready(priv)) iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0); set_bit(STATUS_RF_KILL_SW, &priv->status); /* make sure mac80211 stop sending Tx frame */ if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); } return; } spin_lock_irqsave(&priv->lock, flags); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); clear_bit(STATUS_RF_KILL_SW, &priv->status); spin_unlock_irqrestore(&priv->lock, flags); /* wake up ucode */ msleep(10); spin_lock_irqsave(&priv->lock, flags); iwl_read32(priv, CSR_UCODE_DRV_GP1); if (!iwl_grab_nic_access(priv)) iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->lock, flags); if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { IWL_DEBUG_RF_KILL("Can not turn radio back on - " "disabled by HW switch\n"); return; } queue_work(priv->workqueue, &priv->restart); return; } #define IWL_PACKET_RETRY_TIME HZ int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header) { u16 sc = le16_to_cpu(header->seq_ctrl); u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4; u16 frag = sc & IEEE80211_SCTL_FRAG; u16 *last_seq, *last_frag; unsigned long *last_time; switch (priv->iw_mode) { case IEEE80211_IF_TYPE_IBSS:{ struct list_head *p; struct iwl4965_ibss_seq *entry = NULL; u8 *mac = header->addr2; int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1); __list_for_each(p, &priv->ibss_mac_hash[index]) { entry = list_entry(p, struct iwl4965_ibss_seq, list); if (!compare_ether_addr(entry->mac, mac)) break; } if (p == &priv->ibss_mac_hash[index]) { entry = kzalloc(sizeof(*entry), GFP_ATOMIC); if (!entry) { IWL_ERROR("Cannot malloc new mac entry\n"); return 0; } memcpy(entry->mac, mac, ETH_ALEN); entry->seq_num = seq; entry->frag_num = frag; entry->packet_time = jiffies; list_add(&entry->list, &priv->ibss_mac_hash[index]); return 0; } last_seq = &entry->seq_num; last_frag = &entry->frag_num; last_time = &entry->packet_time; break; } case IEEE80211_IF_TYPE_STA: last_seq = &priv->last_seq_num; last_frag = &priv->last_frag_num; last_time = &priv->last_packet_time; break; default: return 0; } if ((*last_seq == seq) && time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) { if (*last_frag == frag) goto drop; if (*last_frag + 1 != frag) /* out-of-order fragment */ goto drop; } else *last_seq = seq; *last_frag = frag; *last_time = jiffies; return 0; drop: return 1; } #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT #include "iwl-spectrum.h" #define BEACON_TIME_MASK_LOW 0x00FFFFFF #define BEACON_TIME_MASK_HIGH 0xFF000000 #define TIME_UNIT 1024 /* * extended beacon time format * time in usec will be changed into a 32-bit value in 8:24 format * the high 1 byte is the beacon counts * the lower 3 bytes is the time in usec within one beacon interval */ static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval) { u32 quot; u32 rem; u32 interval = beacon_interval * 1024; if (!interval || !usec) return 0; quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24); rem = (usec % interval) & BEACON_TIME_MASK_LOW; return (quot << 24) + rem; } /* base is usually what we get from ucode with each received frame, * the same as HW timer counter counting down */ static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval) { u32 base_low = base & BEACON_TIME_MASK_LOW; u32 addon_low = addon & BEACON_TIME_MASK_LOW; u32 interval = beacon_interval * TIME_UNIT; u32 res = (base & BEACON_TIME_MASK_HIGH) + (addon & BEACON_TIME_MASK_HIGH); if (base_low > addon_low) res += base_low - addon_low; else if (base_low < addon_low) { res += interval + base_low - addon_low; res += (1 << 24); } else res += (1 << 24); return cpu_to_le32(res); } static int iwl4965_get_measurement(struct iwl_priv *priv, struct ieee80211_measurement_params *params, u8 type) { struct iwl4965_spectrum_cmd spectrum; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SPECTRUM_MEASUREMENT_CMD, .data = (void *)&spectrum, .meta.flags = CMD_WANT_SKB, }; u32 add_time = le64_to_cpu(params->start_time); int rc; int spectrum_resp_status; int duration = le16_to_cpu(params->duration); if (iwl_is_associated(priv)) add_time = iwl4965_usecs_to_beacons( le64_to_cpu(params->start_time) - priv->last_tsf, le16_to_cpu(priv->rxon_timing.beacon_interval)); memset(&spectrum, 0, sizeof(spectrum)); spectrum.channel_count = cpu_to_le16(1); spectrum.flags = RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK; spectrum.filter_flags = MEASUREMENT_FILTER_FLAG; cmd.len = sizeof(spectrum); spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len)); if (iwl_is_associated(priv)) spectrum.start_time = iwl4965_add_beacon_time(priv->last_beacon_time, add_time, le16_to_cpu(priv->rxon_timing.beacon_interval)); else spectrum.start_time = 0; spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT); spectrum.channels[0].channel = params->channel; spectrum.channels[0].type = type; if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK) spectrum.flags |= RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; rc = iwl_send_cmd_sync(priv, &cmd); if (rc) return rc; res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n"); rc = -EIO; } spectrum_resp_status = le16_to_cpu(res->u.spectrum.status); switch (spectrum_resp_status) { case 0: /* Command will be handled */ if (res->u.spectrum.id != 0xff) { IWL_DEBUG_INFO ("Replaced existing measurement: %d\n", res->u.spectrum.id); priv->measurement_status &= ~MEASUREMENT_READY; } priv->measurement_status |= MEASUREMENT_ACTIVE; rc = 0; break; case 1: /* Command will not be handled */ rc = -EAGAIN; break; } dev_kfree_skb_any(cmd.meta.u.skb); return rc; } #endif static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv, struct iwl_tx_info *tx_sta) { ieee80211_tx_status_irqsafe(priv->hw, tx_sta->skb[0]); tx_sta->skb[0] = NULL; } /** * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd * * When FW advances 'R' index, all entries between old and new 'R' index * need to be reclaimed. As result, some free space forms. If there is * enough free space (> low mark), wake the stack that feeds us. */ int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index) { struct iwl_tx_queue *txq = &priv->txq[txq_id]; struct iwl_queue *q = &txq->q; int nfreed = 0; if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) { IWL_ERROR("Read index for DMA queue txq id (%d), index %d, " "is out of range [0-%d] %d %d.\n", txq_id, index, q->n_bd, q->write_ptr, q->read_ptr); return 0; } for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index; q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { if (txq_id != IWL_CMD_QUEUE_NUM) { iwl4965_txstatus_to_ieee(priv, &(txq->txb[txq->q.read_ptr])); iwl_hw_txq_free_tfd(priv, txq); } else if (nfreed > 1) { IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index, q->write_ptr, q->read_ptr); queue_work(priv->workqueue, &priv->restart); } nfreed++; } return nfreed; } static int iwl4965_is_tx_success(u32 status) { status &= TX_STATUS_MSK; return (status == TX_STATUS_SUCCESS) || (status == TX_STATUS_DIRECT_DONE); } /****************************************************************************** * * Generic RX handler implementations * ******************************************************************************/ #ifdef CONFIG_IWL4965_HT static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr) { if (priv->iw_mode == IEEE80211_IF_TYPE_STA) return IWL_AP_ID; else { u8 *da = ieee80211_get_DA(hdr); return iwl_find_station(priv, da); } } static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr( struct iwl_priv *priv, int txq_id, int idx) { if (priv->txq[txq_id].txb[idx].skb[0]) return (struct ieee80211_hdr *)priv->txq[txq_id]. txb[idx].skb[0]->data; return NULL; } static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp) { __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status + tx_resp->frame_count); return le32_to_cpu(*scd_ssn) & MAX_SN; } /** * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue */ static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv, struct iwl_ht_agg *agg, struct iwl4965_tx_resp_agg *tx_resp, u16 start_idx) { u16 status; struct agg_tx_status *frame_status = &tx_resp->status; struct ieee80211_tx_info *info = NULL; struct ieee80211_hdr *hdr = NULL; int i, sh; int txq_id, idx; u16 seq; if (agg->wait_for_ba) IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n"); agg->frame_count = tx_resp->frame_count; agg->start_idx = start_idx; agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); agg->bitmap = 0; /* # frames attempted by Tx command */ if (agg->frame_count == 1) { /* Only one frame was attempted; no block-ack will arrive */ status = le16_to_cpu(frame_status[0].status); seq = le16_to_cpu(frame_status[0].sequence); idx = SEQ_TO_INDEX(seq); txq_id = SEQ_TO_QUEUE(seq); /* FIXME: code repetition */ IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n", agg->frame_count, agg->start_idx, idx); info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]); info->status.retry_count = tx_resp->failure_frame; info->flags &= ~IEEE80211_TX_CTL_AMPDU; info->flags |= iwl4965_is_tx_success(status)? IEEE80211_TX_STAT_ACK : 0; iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), info); /* FIXME: code repetition end */ IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff, tx_resp->failure_frame); IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags)); agg->wait_for_ba = 0; } else { /* Two or more frames were attempted; expect block-ack */ u64 bitmap = 0; int start = agg->start_idx; /* Construct bit-map of pending frames within Tx window */ for (i = 0; i < agg->frame_count; i++) { u16 sc; status = le16_to_cpu(frame_status[i].status); seq = le16_to_cpu(frame_status[i].sequence); idx = SEQ_TO_INDEX(seq); txq_id = SEQ_TO_QUEUE(seq); if (status & (AGG_TX_STATE_FEW_BYTES_MSK | AGG_TX_STATE_ABORT_MSK)) continue; IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n", agg->frame_count, txq_id, idx); hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx); sc = le16_to_cpu(hdr->seq_ctrl); if (idx != (SEQ_TO_SN(sc) & 0xff)) { IWL_ERROR("BUG_ON idx doesn't match seq control" " idx=%d, seq_idx=%d, seq=%d\n", idx, SEQ_TO_SN(sc), hdr->seq_ctrl); return -1; } IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx, SEQ_TO_SN(sc)); sh = idx - start; if (sh > 64) { sh = (start - idx) + 0xff; bitmap = bitmap << sh; sh = 0; start = idx; } else if (sh < -64) sh = 0xff - (start - idx); else if (sh < 0) { sh = start - idx; start = idx; bitmap = bitmap << sh; sh = 0; } bitmap |= (1 << sh); IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n", start, (u32)(bitmap & 0xFFFFFFFF)); } agg->bitmap = bitmap; agg->start_idx = start; agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n", agg->frame_count, agg->start_idx, (unsigned long long)agg->bitmap); if (bitmap) agg->wait_for_ba = 1; } return 0; } #endif /** * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response */ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; u16 sequence = le16_to_cpu(pkt->hdr.sequence); int txq_id = SEQ_TO_QUEUE(sequence); int index = SEQ_TO_INDEX(sequence); struct iwl_tx_queue *txq = &priv->txq[txq_id]; struct ieee80211_tx_info *info; struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; u32 status = le32_to_cpu(tx_resp->status); #ifdef CONFIG_IWL4965_HT int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION; u16 fc; struct ieee80211_hdr *hdr; u8 *qc = NULL; #endif if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) { IWL_ERROR("Read index for DMA queue txq_id (%d) index %d " "is out of range [0-%d] %d %d\n", txq_id, index, txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr); return; } info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]); memset(&info->status, 0, sizeof(info->status)); #ifdef CONFIG_IWL4965_HT hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index); fc = le16_to_cpu(hdr->frame_control); if (ieee80211_is_qos_data(fc)) { qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc)); tid = qc[0] & 0xf; } sta_id = iwl4965_get_ra_sta_id(priv, hdr); if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) { IWL_ERROR("Station not known\n"); return; } if (txq->sched_retry) { const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp); struct iwl_ht_agg *agg = NULL; if (!qc) return; agg = &priv->stations[sta_id].tid[tid].agg; iwl4965_tx_status_reply_tx(priv, agg, (struct iwl4965_tx_resp_agg *)tx_resp, index); if ((tx_resp->frame_count == 1) && !iwl4965_is_tx_success(status)) { /* TODO: send BAR */ } if (txq->q.read_ptr != (scd_ssn & 0xff)) { int freed, ampdu_q; index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn " "%d index %d\n", scd_ssn , index); freed = iwl4965_tx_queue_reclaim(priv, txq_id, index); priv->stations[sta_id].tid[tid].tfds_in_queue -= freed; if (iwl_queue_space(&txq->q) > txq->q.low_mark && txq_id >= 0 && priv->mac80211_registered && agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) { /* calculate mac80211 ampdu sw queue to wake */ ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID + priv->hw->queues; if (agg->state == IWL_AGG_OFF) ieee80211_wake_queue(priv->hw, txq_id); else ieee80211_wake_queue(priv->hw, ampdu_q); } iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); } } else { #endif /* CONFIG_IWL4965_HT */ info->status.retry_count = tx_resp->failure_frame; info->flags |= iwl4965_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0; iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), info); IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x " "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status), status, le32_to_cpu(tx_resp->rate_n_flags), tx_resp->failure_frame); IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index); #ifdef CONFIG_IWL4965_HT if (index != -1) { int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index); if (tid != MAX_TID_COUNT) priv->stations[sta_id].tid[tid].tfds_in_queue -= freed; if (iwl_queue_space(&txq->q) > txq->q.low_mark && (txq_id >= 0) && priv->mac80211_registered) ieee80211_wake_queue(priv->hw, txq_id); if (tid != MAX_TID_COUNT) iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); } } #endif /* CONFIG_IWL4965_HT */ if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK)) IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n"); } static void iwl4965_rx_reply_alive(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; IWL_DEBUG_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", palive->is_valid, palive->ver_type, palive->ver_subtype); if (palive->ver_subtype == INITIALIZE_SUBTYPE) { IWL_DEBUG_INFO("Initialization Alive received.\n"); memcpy(&priv->card_alive_init, &pkt->u.alive_frame, sizeof(struct iwl4965_init_alive_resp)); pwork = &priv->init_alive_start; } else { IWL_DEBUG_INFO("Runtime Alive received.\n"); memcpy(&priv->card_alive, &pkt->u.alive_frame, sizeof(struct iwl4965_alive_resp)); pwork = &priv->alive_start; } /* We delay the ALIVE response by 5ms to * give the HW RF Kill time to activate... */ if (palive->is_valid == UCODE_VALID_OK) queue_delayed_work(priv->workqueue, pwork, msecs_to_jiffies(5)); else IWL_WARNING("uCode did not respond OK.\n"); } static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status); return; } static void iwl4965_rx_reply_error(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) " "seq 0x%04X ser 0x%08X\n", le32_to_cpu(pkt->u.err_resp.error_type), get_cmd_string(pkt->u.err_resp.cmd_id), pkt->u.err_resp.cmd_id, le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), le32_to_cpu(pkt->u.err_resp.error_info)); } #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon; struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif); IWL_DEBUG_11H("CSA notif: channel %d, status %d\n", le16_to_cpu(csa->channel), le32_to_cpu(csa->status)); rxon->channel = csa->channel; priv->staging_rxon.channel = csa->channel; } static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif); if (!report->state) { IWL_DEBUG(IWL_DL_11H, "Spectrum Measure Notification: Start\n"); return; } memcpy(&priv->measure_report, report, sizeof(*report)); priv->measurement_status |= MEASUREMENT_READY; #endif } static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif); IWL_DEBUG_RX("sleep mode: %d, src: %d\n", sleep->pm_sleep_mode, sleep->pm_wakeup_src); #endif } static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; IWL_DEBUG_RADIO("Dumping %d bytes of unhandled " "notification for %s:\n", le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd)); iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len)); } static void iwl4965_bg_beacon_update(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, beacon_update); struct sk_buff *beacon; /* Pull updated AP beacon from mac80211. will fail if not in AP mode */ beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (!beacon) { IWL_ERROR("update beacon failed\n"); return; } mutex_lock(&priv->mutex); /* new beacon skb is allocated every time; dispose previous.*/ if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = beacon; mutex_unlock(&priv->mutex); iwl4965_send_beacon_cmd(priv); } static void iwl4965_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status); u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); IWL_DEBUG_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n", le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le32_to_cpu(beacon->ibss_mgr_status), le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); #endif if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) && (!test_bit(STATUS_EXIT_PENDING, &priv->status))) queue_work(priv->workqueue, &priv->beacon_update); } /* Service response to REPLY_SCAN_CMD (0x80) */ static void iwl4965_rx_reply_scan(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_scanreq_notification *notif = (struct iwl4965_scanreq_notification *)pkt->u.raw; IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status); #endif } /* Service SCAN_START_NOTIFICATION (0x82) */ static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_scanstart_notification *notif = (struct iwl4965_scanstart_notification *)pkt->u.raw; priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); IWL_DEBUG_SCAN("Scan start: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel, notif->band ? "bg" : "a", notif->tsf_high, notif->tsf_low, notif->status, notif->beacon_timer); } /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_scanresults_notification *notif = (struct iwl4965_scanresults_notification *)pkt->u.raw; IWL_DEBUG_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d " "elapsed=%lu usec (%dms since last)\n", notif->channel, notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low), le32_to_cpu(notif->statistics[0]), le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf, jiffies_to_msecs(elapsed_jiffies (priv->last_scan_jiffies, jiffies))); priv->last_scan_jiffies = jiffies; priv->next_scan_jiffies = 0; } /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw; IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", scan_notif->scanned_channels, scan_notif->tsf_low, scan_notif->tsf_high, scan_notif->status); /* The HW is no longer scanning */ clear_bit(STATUS_SCAN_HW, &priv->status); /* The scan completion notification came in, so kill that timer... */ cancel_delayed_work(&priv->scan_check); IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n", (priv->scan_bands == 2) ? "2.4" : "5.2", jiffies_to_msecs(elapsed_jiffies (priv->scan_pass_start, jiffies))); /* Remove this scanned band from the list * of pending bands to scan */ priv->scan_bands--; /* If a request to abort was given, or the scan did not succeed * then we reset the scan state machine and terminate, * re-queuing another scan if one has been requested */ if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_INFO("Aborted scan completed.\n"); clear_bit(STATUS_SCAN_ABORTING, &priv->status); } else { /* If there are more bands on this scan pass reschedule */ if (priv->scan_bands > 0) goto reschedule; } priv->last_scan_jiffies = jiffies; priv->next_scan_jiffies = 0; IWL_DEBUG_INFO("Setting scan to off\n"); clear_bit(STATUS_SCANNING, &priv->status); IWL_DEBUG_INFO("Scan took %dms\n", jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies))); queue_work(priv->workqueue, &priv->scan_completed); return; reschedule: priv->scan_pass_start = jiffies; queue_work(priv->workqueue, &priv->request_scan); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void iwl4965_rx_card_state_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = priv->status; IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On"); if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | RF_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (!iwl_grab_nic_access(priv)) { iwl_write_direct32( priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); iwl_release_nic_access(priv); } if (!(flags & RXON_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (!iwl_grab_nic_access(priv)) { iwl_write_direct32( priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); iwl_release_nic_access(priv); } } if (flags & RF_CARD_DISABLED) { iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); iwl_read32(priv, CSR_UCODE_DRV_GP1); if (!iwl_grab_nic_access(priv)) iwl_release_nic_access(priv); } } if (flags & HW_CARD_DISABLED) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); if (flags & SW_CARD_DISABLED) set_bit(STATUS_RF_KILL_SW, &priv->status); else clear_bit(STATUS_RF_KILL_SW, &priv->status); if (!(flags & RXON_CARD_DISABLED)) iwl4965_scan_cancel(priv); if ((test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status)) || (test_bit(STATUS_RF_KILL_SW, &status) != test_bit(STATUS_RF_KILL_SW, &priv->status))) queue_work(priv->workqueue, &priv->rf_kill); else wake_up_interruptible(&priv->wait_command_queue); } /** * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks * * Setup the RX handlers for each of the reply types sent from the uCode * to the host. * * This function chains into the hardware specific files for them to setup * any hardware specific handlers as well. */ static void iwl4965_setup_rx_handlers(struct iwl_priv *priv) { priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive; priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta; priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error; priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa; priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl4965_rx_spectrum_measure_notif; priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif; priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl4965_rx_pm_debug_statistics_notif; priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif; /* * The same handler is used for both the REPLY to a discrete * statistics request from the host as well as for the periodic * statistics notifications (after received beacons) from the uCode. */ priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics; priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan; priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif; priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = iwl4965_rx_scan_results_notif; priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = iwl4965_rx_scan_complete_notif; priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif; priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx; /* Set up hardware specific Rx handlers */ priv->cfg->ops->lib->rx_handler_setup(priv); } /** * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them * @rxb: Rx buffer to reclaim * * If an Rx buffer has an async callback associated with it the callback * will be executed. The attached skb (if present) will only be freed * if the callback returns 1 */ static void iwl4965_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; u16 sequence = le16_to_cpu(pkt->hdr.sequence); int txq_id = SEQ_TO_QUEUE(sequence); int index = SEQ_TO_INDEX(sequence); int huge = sequence & SEQ_HUGE_FRAME; int cmd_index; struct iwl_cmd *cmd; /* If a Tx command is being handled and it isn't in the actual * command queue then there a command routing bug has been introduced * in the queue management code. */ if (txq_id != IWL_CMD_QUEUE_NUM) IWL_ERROR("Error wrong command queue %d command id 0x%X\n", txq_id, pkt->hdr.cmd); BUG_ON(txq_id != IWL_CMD_QUEUE_NUM); cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge); cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index]; /* Input error checking is done when commands are added to queue. */ if (cmd->meta.flags & CMD_WANT_SKB) { cmd->meta.source->u.skb = rxb->skb; rxb->skb = NULL; } else if (cmd->meta.u.callback && !cmd->meta.u.callback(priv, cmd, rxb->skb)) rxb->skb = NULL; iwl4965_tx_queue_reclaim(priv, txq_id, index); if (!(cmd->meta.flags & CMD_ASYNC)) { clear_bit(STATUS_HCMD_ACTIVE, &priv->status); wake_up_interruptible(&priv->wait_command_queue); } } /* * this should be called while priv->lock is locked */ static void __iwl_rx_replenish(struct iwl_priv *priv) { iwl_rx_allocate(priv); iwl_rx_queue_restock(priv); } /** * iwl_rx_handle - Main entry function for receiving responses from uCode * * Uses the priv->rx_handlers callback function array to invoke * the appropriate handlers, including command responses, * frame-received notifications, and other notifications. */ void iwl_rx_handle(struct iwl_priv *priv) { struct iwl_rx_mem_buffer *rxb; struct iwl_rx_packet *pkt; struct iwl_rx_queue *rxq = &priv->rxq; u32 r, i; int reclaim; unsigned long flags; u8 fill_rx = 0; u32 count = 8; /* uCode's read index (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = priv->cfg->ops->lib->shared_mem_rx_idx(priv); i = rxq->read; /* Rx interrupt, but nothing sent from uCode */ if (i == r) IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i); if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2)) fill_rx = 1; while (i != r) { rxb = rxq->queue[i]; /* If an RXB doesn't have a Rx queue slot associated with it, * then a bug has been introduced in the queue refilling * routines -- catch it here */ BUG_ON(rxb == NULL); rxq->queue[i] = NULL; pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); pkt = (struct iwl_rx_packet *)rxb->skb->data; /* Reclaim a command buffer only if this packet is a response * to a (driver-originated) command. * If the packet (e.g. Rx frame) originated from uCode, * there is no command buffer to reclaim. * Ucode should set SEQ_RX_FRAME bit if ucode-originated, * but apparently a few don't get set; catch them here. */ reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) && (pkt->hdr.cmd != REPLY_RX_PHY_CMD) && (pkt->hdr.cmd != REPLY_RX) && (pkt->hdr.cmd != REPLY_COMPRESSED_BA) && (pkt->hdr.cmd != STATISTICS_NOTIFICATION) && (pkt->hdr.cmd != REPLY_TX); /* Based on type of command response or notification, * handle those that need handling via function in * rx_handlers table. See iwl4965_setup_rx_handlers() */ if (priv->rx_handlers[pkt->hdr.cmd]) { IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); } else { /* No handling needed */ IWL_DEBUG(IWL_DL_RX, "r %d i %d No handler needed for %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); } if (reclaim) { /* Invoke any callbacks, transfer the skb to caller, and * fire off the (possibly) blocking iwl_send_cmd() * as we reclaim the driver command queue */ if (rxb && rxb->skb) iwl4965_tx_cmd_complete(priv, rxb); else IWL_WARNING("Claim null rxb?\n"); } /* For now we just don't re-use anything. We can tweak this * later to try and re-use notification packets and SKBs that * fail to Rx correctly */ if (rxb->skb != NULL) { priv->alloc_rxb_skb--; dev_kfree_skb_any(rxb->skb); rxb->skb = NULL; } pci_unmap_single(priv->pci_dev, rxb->dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); spin_lock_irqsave(&rxq->lock, flags); list_add_tail(&rxb->list, &priv->rxq.rx_used); spin_unlock_irqrestore(&rxq->lock, flags); i = (i + 1) & RX_QUEUE_MASK; /* If there are a lot of unused frames, * restock the Rx queue so ucode wont assert. */ if (fill_rx) { count++; if (count >= 8) { priv->rxq.read = i; __iwl_rx_replenish(priv); count = 0; } } } /* Backtrack one entry */ priv->rxq.read = i; iwl_rx_queue_restock(priv); } /* Convert linear signal-to-noise ratio into dB */ static u8 ratio2dB[100] = { /* 0 1 2 3 4 5 6 7 8 9 */ 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */ 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */ 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */ 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */ 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */ 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */ 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */ 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */ 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */ 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */ }; /* Calculates a relative dB value from a ratio of linear * (i.e. not dB) signal levels. * Conversion assumes that levels are voltages (20*log), not powers (10*log). */ int iwl4965_calc_db_from_ratio(int sig_ratio) { /* 1000:1 or higher just report as 60 dB */ if (sig_ratio >= 1000) return 60; /* 100:1 or higher, divide by 10 and use table, * add 20 dB to make up for divide by 10 */ if (sig_ratio >= 100) return (20 + (int)ratio2dB[sig_ratio/10]); /* We shouldn't see this */ if (sig_ratio < 1) return 0; /* Use table for ratios 1:1 - 99:1 */ return (int)ratio2dB[sig_ratio]; } #define PERFECT_RSSI (-20) /* dBm */ #define WORST_RSSI (-95) /* dBm */ #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI) /* Calculate an indication of rx signal quality (a percentage, not dBm!). * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info * about formulas used below. */ int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm) { int sig_qual; int degradation = PERFECT_RSSI - rssi_dbm; /* If we get a noise measurement, use signal-to-noise ratio (SNR) * as indicator; formula is (signal dbm - noise dbm). * SNR at or above 40 is a great signal (100%). * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator. * Weakest usable signal is usually 10 - 15 dB SNR. */ if (noise_dbm) { if (rssi_dbm - noise_dbm >= 40) return 100; else if (rssi_dbm < noise_dbm) return 0; sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2; /* Else use just the signal level. * This formula is a least squares fit of data points collected and * compared with a reference system that had a percentage (%) display * for signal quality. */ } else sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation * (15 * RSSI_RANGE + 62 * degradation)) / (RSSI_RANGE * RSSI_RANGE); if (sig_qual > 100) sig_qual = 100; else if (sig_qual < 1) sig_qual = 0; return sig_qual; } #ifdef CONFIG_IWLWIFI_DEBUG static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv) { struct iwl_rxon_cmd *rxon = &priv->staging_rxon; DECLARE_MAC_BUF(mac); IWL_DEBUG_RADIO("RX CONFIG:\n"); iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags)); IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type); IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates); IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); IWL_DEBUG_RADIO("u8[6] node_addr: %s\n", print_mac(mac, rxon->node_addr)); IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n", print_mac(mac, rxon->bssid_addr)); IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); } #endif static void iwl4965_enable_interrupts(struct iwl_priv *priv) { IWL_DEBUG_ISR("Enabling interrupts\n"); set_bit(STATUS_INT_ENABLED, &priv->status); iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK); } /* call this function to flush any scheduled tasklet */ static inline void iwl_synchronize_irq(struct iwl_priv *priv) { /* wait to make sure we flush pedding tasklet*/ synchronize_irq(priv->pci_dev->irq); tasklet_kill(&priv->irq_tasklet); } static inline void iwl4965_disable_interrupts(struct iwl_priv *priv) { clear_bit(STATUS_INT_ENABLED, &priv->status); /* disable interrupts from uCode/NIC to host */ iwl_write32(priv, CSR_INT_MASK, 0x00000000); /* acknowledge/clear/reset any interrupts still pending * from uCode or flow handler (Rx/Tx DMA) */ iwl_write32(priv, CSR_INT, 0xffffffff); iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff); IWL_DEBUG_ISR("Disabled interrupts\n"); } /** * iwl4965_irq_handle_error - called for HW or SW error interrupt from card */ static void iwl4965_irq_handle_error(struct iwl_priv *priv) { /* Set the FW error flag -- cleared on iwl4965_down */ set_bit(STATUS_FW_ERROR, &priv->status); /* Cancel currently queued command. */ clear_bit(STATUS_HCMD_ACTIVE, &priv->status); #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & IWL_DL_FW_ERRORS) { iwl_dump_nic_error_log(priv); iwl_dump_nic_event_log(priv); iwl4965_print_rx_config_cmd(priv); } #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 (!test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG(IWL_DL_FW_ERRORS, "Restarting adapter due to uCode error.\n"); if (iwl_is_associated(priv)) { memcpy(&priv->recovery_rxon, &priv->active_rxon, sizeof(priv->recovery_rxon)); priv->error_recovering = 1; } if (priv->cfg->mod_params->restart_fw) queue_work(priv->workqueue, &priv->restart); } } static void iwl4965_error_recovery(struct iwl_priv *priv) { unsigned long flags; memcpy(&priv->staging_rxon, &priv->recovery_rxon, sizeof(priv->staging_rxon)); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); iwl_rxon_add_station(priv, priv->bssid, 1); spin_lock_irqsave(&priv->lock, flags); priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id); priv->error_recovering = 0; spin_unlock_irqrestore(&priv->lock, flags); } static void iwl4965_irq_tasklet(struct iwl_priv *priv) { u32 inta, handled = 0; u32 inta_fh; unsigned long flags; #ifdef CONFIG_IWLWIFI_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&priv->lock, flags); /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, * and will clear only when CSR_FH_INT_STATUS gets cleared. */ inta = iwl_read32(priv, CSR_INT); iwl_write32(priv, CSR_INT, inta); /* Ack/clear/reset pending flow-handler (DMA) interrupts. * Any new interrupts that happen after this, either while we're * in this tasklet, or later, will show up in next ISR/tasklet. */ inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not * atomic, make sure that inta covers all the interrupts that * we've discovered, even if FH interrupt came in just after * reading CSR_INT. */ if (inta_fh & CSR49_FH_INT_RX_MASK) inta |= CSR_INT_BIT_FH_RX; if (inta_fh & CSR49_FH_INT_TX_MASK) inta |= CSR_INT_BIT_FH_TX; /* Now service all interrupt bits discovered above. */ if (inta & CSR_INT_BIT_HW_ERR) { IWL_ERROR("Microcode HW error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl4965_disable_interrupts(priv); iwl4965_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; spin_unlock_irqrestore(&priv->lock, flags); return; } #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) IWL_DEBUG_ISR("Scheduler finished to transmit " "the frame/frames.\n"); /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) IWL_DEBUG_ISR("Alive interrupt\n"); } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* HW RF KILL switch toggled */ if (inta & CSR_INT_BIT_RF_KILL) { int hw_rf_kill = 0; if (!(iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) hw_rf_kill = 1; IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n", hw_rf_kill ? "disable radio":"enable radio"); /* Queue restart only if RF_KILL switch was set to "kill" * when we loaded driver, and is now set to "enable". * After we're Alive, RF_KILL gets handled by * iwl4965_rx_card_state_notif() */ if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) { clear_bit(STATUS_RF_KILL_HW, &priv->status); queue_work(priv->workqueue, &priv->restart); } handled |= CSR_INT_BIT_RF_KILL; } /* Chip got too hot and stopped itself */ if (inta & CSR_INT_BIT_CT_KILL) { IWL_ERROR("Microcode CT kill error detected.\n"); handled |= CSR_INT_BIT_CT_KILL; } /* Error detected by uCode */ if (inta & CSR_INT_BIT_SW_ERR) { IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n", inta); iwl4965_irq_handle_error(priv); handled |= CSR_INT_BIT_SW_ERR; } /* uCode wakes up after power-down sleep */ if (inta & CSR_INT_BIT_WAKEUP) { IWL_DEBUG_ISR("Wakeup interrupt\n"); iwl_rx_queue_update_write_ptr(priv, &priv->rxq); iwl_txq_update_write_ptr(priv, &priv->txq[0]); iwl_txq_update_write_ptr(priv, &priv->txq[1]); iwl_txq_update_write_ptr(priv, &priv->txq[2]); iwl_txq_update_write_ptr(priv, &priv->txq[3]); iwl_txq_update_write_ptr(priv, &priv->txq[4]); iwl_txq_update_write_ptr(priv, &priv->txq[5]); handled |= CSR_INT_BIT_WAKEUP; } /* All uCode command responses, including Tx command responses, * Rx "responses" (frame-received notification), and other * notifications from uCode come through here*/ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { iwl_rx_handle(priv); handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } if (inta & CSR_INT_BIT_FH_TX) { IWL_DEBUG_ISR("Tx interrupt\n"); handled |= CSR_INT_BIT_FH_TX; /* FH finished to write, send event */ priv->ucode_write_complete = 1; wake_up_interruptible(&priv->wait_command_queue); } if (inta & ~handled) IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled); if (inta & ~CSR_INI_SET_MASK) { IWL_WARNING("Disabled INTA bits 0x%08x were pending\n", inta & ~CSR_INI_SET_MASK); IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if diabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl4965_enable_interrupts(priv); #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { inta = iwl_read32(priv, CSR_INT); inta_mask = iwl_read32(priv, CSR_INT_MASK); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif spin_unlock_irqrestore(&priv->lock, flags); } static irqreturn_t iwl4965_isr(int irq, void *data) { struct iwl_priv *priv = data; u32 inta, inta_mask; u32 inta_fh; if (!priv) return IRQ_NONE; spin_lock(&priv->lock); /* Disable (but don't clear!) interrupts here to avoid * back-to-back ISRs and sporadic interrupts from our NIC. * If we have something to service, the tasklet will re-enable ints. * If we *don't* have something, we'll re-enable before leaving here. */ inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */ iwl_write32(priv, CSR_INT_MASK, 0x00000000); /* Discover which interrupts are active/pending */ inta = iwl_read32(priv, CSR_INT); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); /* Ignore interrupt if there's nothing in NIC to service. * This may be due to IRQ shared with another device, * or due to sporadic interrupts thrown from our NIC. */ if (!inta && !inta_fh) { IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n"); goto none; } if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { /* Hardware disappeared. It might have already raised * an interrupt */ IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta); goto unplugged; } IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); inta &= ~CSR_INT_BIT_SCD; /* iwl4965_irq_tasklet() will service interrupts and re-enable them */ if (likely(inta || inta_fh)) tasklet_schedule(&priv->irq_tasklet); unplugged: spin_unlock(&priv->lock); return IRQ_HANDLED; none: /* re-enable interrupts here since we don't have anything to service. */ /* only Re-enable if diabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl4965_enable_interrupts(priv); spin_unlock(&priv->lock); return IRQ_NONE; } /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after * sending probe req. This should be set long enough to hear probe responses * from more than one AP. */ #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */ #define IWL_ACTIVE_DWELL_TIME_52 (10) /* For faster active scanning, scan will move to the next channel if fewer than * PLCP_QUIET_THRESH packets are heard on this channel within * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell * time if it's a quiet channel (nothing responded to our probe, and there's * no other traffic). * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */ #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */ #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */ /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. * Must be set longer than active dwell time. * For the most reliable scan, set > AP beacon interval (typically 100msec). */ #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ #define IWL_PASSIVE_DWELL_TIME_52 (10) #define IWL_PASSIVE_DWELL_BASE (100) #define IWL_CHANNEL_TUNE_TIME 5 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv, enum ieee80211_band band) { if (band == IEEE80211_BAND_5GHZ) return IWL_ACTIVE_DWELL_TIME_52; else return IWL_ACTIVE_DWELL_TIME_24; } static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv, enum ieee80211_band band) { u16 active = iwl4965_get_active_dwell_time(priv, band); u16 passive = (band != IEEE80211_BAND_5GHZ) ? IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; if (iwl_is_associated(priv)) { /* If we're associated, we clamp the maximum passive * dwell time to be 98% of the beacon interval (minus * 2 * channel tune time) */ passive = priv->beacon_int; if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) passive = IWL_PASSIVE_DWELL_BASE; passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; } if (passive <= active) passive = active + 1; return passive; } static int iwl4965_get_channels_for_scan(struct iwl_priv *priv, enum ieee80211_band band, u8 is_active, u8 direct_mask, struct iwl4965_scan_channel *scan_ch) { const struct ieee80211_channel *channels = NULL; const struct ieee80211_supported_band *sband; const struct iwl_channel_info *ch_info; u16 passive_dwell = 0; u16 active_dwell = 0; int added, i; sband = iwl_get_hw_mode(priv, band); if (!sband) return 0; channels = sband->channels; active_dwell = iwl4965_get_active_dwell_time(priv, band); passive_dwell = iwl4965_get_passive_dwell_time(priv, band); for (i = 0, added = 0; i < sband->n_channels; i++) { if (channels[i].flags & IEEE80211_CHAN_DISABLED) continue; scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq); ch_info = iwl_get_channel_info(priv, band, scan_ch->channel); if (!is_channel_valid(ch_info)) { IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n", scan_ch->channel); continue; } if (!is_active || is_channel_passive(ch_info) || (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) scan_ch->type = 0; /* passive */ else scan_ch->type = 1; /* active */ if (scan_ch->type & 1) scan_ch->type |= (direct_mask << 1); scan_ch->active_dwell = cpu_to_le16(active_dwell); scan_ch->passive_dwell = cpu_to_le16(passive_dwell); /* Set txpower levels to defaults */ scan_ch->tpc.dsp_atten = 110; /* scan_pwr_info->tpc.dsp_atten; */ /*scan_pwr_info->tpc.tx_gain; */ if (band == IEEE80211_BAND_5GHZ) scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3; else { scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3)); /* NOTE: if we were doing 6Mb OFDM for scans we'd use * power level: * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3; */ } IWL_DEBUG_SCAN("Scanning %d [%s %d]\n", scan_ch->channel, (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE", (scan_ch->type & 1) ? active_dwell : passive_dwell); scan_ch++; added++; } IWL_DEBUG_SCAN("total channels to scan %d \n", added); return added; } /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv) { iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot); } static void iwl4965_nic_start(struct iwl_priv *priv) { /* Remove all resets to allow NIC to operate */ iwl_write32(priv, CSR_RESET, 0); } /** * iwl4965_read_ucode - Read uCode images from disk file. * * Copy into buffers for card to fetch via bus-mastering */ static int iwl4965_read_ucode(struct iwl_priv *priv) { struct iwl4965_ucode *ucode; int ret; const struct firmware *ucode_raw; const char *name = priv->cfg->fw_name; u8 *src; size_t len; u32 ver, inst_size, data_size, init_size, init_data_size, boot_size; /* Ask kernel firmware_class module to get the boot firmware off disk. * request_firmware() is synchronous, file is in memory on return. */ ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev); if (ret < 0) { IWL_ERROR("%s firmware file req failed: Reason %d\n", name, ret); goto error; } IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n", name, ucode_raw->size); /* Make sure that we got at least our header! */ if (ucode_raw->size < sizeof(*ucode)) { IWL_ERROR("File size way too small!\n"); ret = -EINVAL; goto err_release; } /* Data from ucode file: header followed by uCode images */ ucode = (void *)ucode_raw->data; ver = le32_to_cpu(ucode->ver); inst_size = le32_to_cpu(ucode->inst_size); data_size = le32_to_cpu(ucode->data_size); init_size = le32_to_cpu(ucode->init_size); init_data_size = le32_to_cpu(ucode->init_data_size); boot_size = le32_to_cpu(ucode->boot_size); IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver); IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size); IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size); IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size); IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size); IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size); /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size < sizeof(*ucode) + inst_size + data_size + init_size + init_data_size + boot_size) { IWL_DEBUG_INFO("uCode file size %d too small\n", (int)ucode_raw->size); ret = -EINVAL; goto err_release; } /* Verify that uCode images will fit in card's SRAM */ if (inst_size > priv->hw_params.max_inst_size) { IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n", inst_size); ret = -EINVAL; goto err_release; } if (data_size > priv->hw_params.max_data_size) { IWL_DEBUG_INFO("uCode data len %d too large to fit in\n", data_size); ret = -EINVAL; goto err_release; } if (init_size > priv->hw_params.max_inst_size) { IWL_DEBUG_INFO ("uCode init instr len %d too large to fit in\n", init_size); ret = -EINVAL; goto err_release; } if (init_data_size > priv->hw_params.max_data_size) { IWL_DEBUG_INFO ("uCode init data len %d too large to fit in\n", init_data_size); ret = -EINVAL; goto err_release; } if (boot_size > priv->hw_params.max_bsm_size) { IWL_DEBUG_INFO ("uCode boot instr len %d too large to fit in\n", boot_size); ret = -EINVAL; goto err_release; } /* Allocate ucode buffers for card's bus-master loading ... */ /* Runtime instructions and 2 copies of data: * 1) unmodified from disk * 2) backup cache for save/restore during power-downs */ priv->ucode_code.len = inst_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code); priv->ucode_data.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data); priv->ucode_data_backup.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup); /* Initialization instructions and data */ if (init_size && init_data_size) { priv->ucode_init.len = init_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init); priv->ucode_init_data.len = init_data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data); if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr) goto err_pci_alloc; } /* Bootstrap (instructions only, no data) */ if (boot_size) { priv->ucode_boot.len = boot_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot); if (!priv->ucode_boot.v_addr) goto err_pci_alloc; } /* Copy images into buffers for card's bus-master reads ... */ /* Runtime instructions (first block of data in file) */ src = &ucode->data[0]; len = priv->ucode_code.len; IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len); memcpy(priv->ucode_code.v_addr, src, len); IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr); /* Runtime data (2nd block) * NOTE: Copy into backup buffer will be done in iwl4965_up() */ src = &ucode->data[inst_size]; len = priv->ucode_data.len; IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len); memcpy(priv->ucode_data.v_addr, src, len); memcpy(priv->ucode_data_backup.v_addr, src, len); /* Initialization instructions (3rd block) */ if (init_size) { src = &ucode->data[inst_size + data_size]; len = priv->ucode_init.len; IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n", len); memcpy(priv->ucode_init.v_addr, src, len); } /* Initialization data (4th block) */ if (init_data_size) { src = &ucode->data[inst_size + data_size + init_size]; len = priv->ucode_init_data.len; IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n", len); memcpy(priv->ucode_init_data.v_addr, src, len); } /* Bootstrap instructions (5th block) */ src = &ucode->data[inst_size + data_size + init_size + init_data_size]; len = priv->ucode_boot.len; IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len); memcpy(priv->ucode_boot.v_addr, src, len); /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); return 0; err_pci_alloc: IWL_ERROR("failed to allocate pci memory\n"); ret = -ENOMEM; iwl4965_dealloc_ucode_pci(priv); err_release: release_firmware(ucode_raw); error: return ret; } /** * iwl4965_alive_start - called after REPLY_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by iwl4965_init_alive_start()). */ static void iwl4965_alive_start(struct iwl_priv *priv) { int ret = 0; IWL_DEBUG_INFO("Runtime Alive received.\n"); if (priv->card_alive.is_valid != UCODE_VALID_OK) { /* We had an error bringing up the hardware, so take it * all the way back down so we can try again */ IWL_DEBUG_INFO("Alive failed.\n"); goto restart; } /* Initialize uCode has loaded Runtime uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "runtime" alive if code weren't properly loaded. */ if (iwl_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO("Bad runtime uCode load.\n"); goto restart; } iwlcore_clear_stations_table(priv); ret = priv->cfg->ops->lib->alive_notify(priv); if (ret) { IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n", ret); goto restart; } /* After the ALIVE response, we can send host commands to 4965 uCode */ set_bit(STATUS_ALIVE, &priv->status); /* Clear out the uCode error bit if it is set */ clear_bit(STATUS_FW_ERROR, &priv->status); if (iwl_is_rfkill(priv)) return; ieee80211_wake_queues(priv->hw); priv->active_rate = priv->rates_mask; priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; if (iwl_is_associated(priv)) { struct iwl_rxon_cmd *active_rxon = (struct iwl_rxon_cmd *)&priv->active_rxon; memcpy(&priv->staging_rxon, &priv->active_rxon, sizeof(priv->staging_rxon)); active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ iwl4965_connection_init_rx_config(priv); memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); } /* Configure Bluetooth device coexistence support */ iwl4965_send_bt_config(priv); /* Configure the adapter for unassociated operation */ iwl4965_commit_rxon(priv); /* At this point, the NIC is initialized and operational */ priv->notif_missed_beacons = 0; iwl4965_rf_kill_ct_config(priv); iwl_leds_register(priv); IWL_DEBUG_INFO("ALIVE processing complete.\n"); set_bit(STATUS_READY, &priv->status); wake_up_interruptible(&priv->wait_command_queue); if (priv->error_recovering) iwl4965_error_recovery(priv); iwlcore_low_level_notify(priv, IWLCORE_START_EVT); ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC); return; restart: queue_work(priv->workqueue, &priv->restart); } static void iwl4965_cancel_deferred_work(struct iwl_priv *priv); static void __iwl4965_down(struct iwl_priv *priv) { unsigned long flags; int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status); IWL_DEBUG_INFO(DRV_NAME " is going down\n"); if (!exit_pending) set_bit(STATUS_EXIT_PENDING, &priv->status); iwl_leds_unregister(priv); iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT); iwlcore_clear_stations_table(priv); /* Unblock any waiting calls */ wake_up_interruptible_all(&priv->wait_command_queue); /* Wipe out the EXIT_PENDING status bit if we are not actually * exiting the module */ if (!exit_pending) clear_bit(STATUS_EXIT_PENDING, &priv->status); /* stop and reset the on-board processor */ iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ spin_lock_irqsave(&priv->lock, flags); iwl4965_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); /* If we have not previously called iwl4965_init() then * clear all bits but the RF Kill and SUSPEND bits and return */ if (!iwl_is_init(priv)) { priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_IN_SUSPEND, &priv->status) << STATUS_IN_SUSPEND; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill and * SUSPEND bits and continue taking the NIC down. */ priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_IN_SUSPEND, &priv->status) << STATUS_IN_SUSPEND | test_bit(STATUS_FW_ERROR, &priv->status) << STATUS_FW_ERROR; spin_lock_irqsave(&priv->lock, flags); iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); spin_unlock_irqrestore(&priv->lock, flags); iwl4965_hw_txq_ctx_stop(priv); iwl4965_hw_rxq_stop(priv); spin_lock_irqsave(&priv->lock, flags); if (!iwl_grab_nic_access(priv)) { iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); iwl_release_nic_access(priv); } spin_unlock_irqrestore(&priv->lock, flags); udelay(5); iwl4965_hw_nic_stop_master(priv); iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); iwl4965_hw_nic_reset(priv); priv->cfg->ops->lib->free_shared_mem(priv); exit: memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp)); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; /* clear out any free frames */ iwl_clear_free_frames(priv); } static void iwl4965_down(struct iwl_priv *priv) { mutex_lock(&priv->mutex); __iwl4965_down(priv); mutex_unlock(&priv->mutex); iwl4965_cancel_deferred_work(priv); } #define MAX_HW_RESTARTS 5 static int __iwl4965_up(struct iwl_priv *priv) { int i; int ret; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_WARNING("Exit pending; will not bring the NIC up\n"); return -EIO; } if (test_bit(STATUS_RF_KILL_SW, &priv->status)) { IWL_WARNING("Radio disabled by SW RF kill (module " "parameter)\n"); iwl_rfkill_set_hw_state(priv); return -ENODEV; } if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) { IWL_ERROR("ucode not available for device bringup\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else { set_bit(STATUS_RF_KILL_HW, &priv->status); if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) { iwl_rfkill_set_hw_state(priv); IWL_WARNING("Radio disabled by HW RF Kill switch\n"); return -ENODEV; } } iwl_rfkill_set_hw_state(priv); iwl_write32(priv, CSR_INT, 0xFFFFFFFF); ret = priv->cfg->ops->lib->alloc_shared_mem(priv); if (ret) { IWL_ERROR("Unable to allocate shared memory\n"); return ret; } ret = iwl_hw_nic_init(priv); if (ret) { IWL_ERROR("Unable to init nic\n"); return ret; } /* make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ iwl_write32(priv, CSR_INT, 0xFFFFFFFF); iwl4965_enable_interrupts(priv); /* really make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); /* Copy original ucode data image from disk into backup cache. * This will be used to initialize the on-board processor's * data SRAM for a clean start when the runtime program first loads. */ memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr, priv->ucode_data.len); /* We return success when we resume from suspend and rf_kill is on. */ if (test_bit(STATUS_RF_KILL_HW, &priv->status)) return 0; for (i = 0; i < MAX_HW_RESTARTS; i++) { iwlcore_clear_stations_table(priv); /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ ret = priv->cfg->ops->lib->load_ucode(priv); if (ret) { IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret); continue; } /* start card; "initialize" will load runtime ucode */ iwl4965_nic_start(priv); IWL_DEBUG_INFO(DRV_NAME " is coming up\n"); return 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); __iwl4965_down(priv); /* tried to restart and config the device for as long as our * patience could withstand */ IWL_ERROR("Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void iwl4965_bg_init_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, init_alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); priv->cfg->ops->lib->init_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl4965_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_rf_kill(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill); wake_up_interruptible(&priv->wait_command_queue); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); if (!iwl_is_rfkill(priv)) { IWL_DEBUG(IWL_DL_RF_KILL, "HW and/or SW RF Kill no longer active, restarting " "device\n"); if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) queue_work(priv->workqueue, &priv->restart); } else { /* make sure mac80211 stop sending Tx frame */ if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); if (!test_bit(STATUS_RF_KILL_HW, &priv->status)) IWL_DEBUG_RF_KILL("Can not turn radio back on - " "disabled by SW switch\n"); else IWL_WARNING("Radio Frequency Kill Switch is On:\n" "Kill switch must be turned off for " "wireless networking to work.\n"); } iwl_rfkill_set_hw_state(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_set_monitor(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, set_monitor); IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n"); mutex_lock(&priv->mutex); if (!iwl_is_ready(priv)) IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n"); else if (iwl4965_set_mode(priv, IEEE80211_IF_TYPE_MNTR) != 0) IWL_ERROR("iwl4965_set_mode() failed\n"); mutex_unlock(&priv->mutex); } #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) static void iwl4965_bg_scan_check(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, scan_check.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); if (test_bit(STATUS_SCANNING, &priv->status) || test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG(IWL_DL_SCAN, "Scan completion watchdog resetting " "adapter (%dms)\n", jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) iwl4965_send_scan_abort(priv); } mutex_unlock(&priv->mutex); } static void iwl4965_bg_request_scan(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, request_scan); struct iwl_host_cmd cmd = { .id = REPLY_SCAN_CMD, .len = sizeof(struct iwl4965_scan_cmd), .meta.flags = CMD_SIZE_HUGE, }; struct iwl4965_scan_cmd *scan; struct ieee80211_conf *conf = NULL; u16 cmd_len; enum ieee80211_band band; u8 direct_mask; int ret = 0; conf = ieee80211_get_hw_conf(priv->hw); mutex_lock(&priv->mutex); if (!iwl_is_ready(priv)) { IWL_WARNING("request scan called when driver not ready.\n"); goto done; } /* Make sure the scan wasn't cancelled before this queued work * was given the chance to run... */ if (!test_bit(STATUS_SCANNING, &priv->status)) goto done; /* This should never be called or scheduled if there is currently * a scan active in the hardware. */ if (test_bit(STATUS_SCAN_HW, &priv->status)) { IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. " "Ignoring second request.\n"); ret = -EIO; goto done; } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n"); goto done; } if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n"); goto done; } if (iwl_is_rfkill(priv)) { IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n"); goto done; } if (!test_bit(STATUS_READY, &priv->status)) { IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n"); goto done; } if (!priv->scan_bands) { IWL_DEBUG_HC("Aborting scan due to no requested bands\n"); goto done; } if (!priv->scan) { priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE, GFP_KERNEL); if (!priv->scan) { ret = -ENOMEM; goto done; } } scan = priv->scan; memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE); scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; scan->quiet_time = IWL_ACTIVE_QUIET_TIME; if (iwl_is_associated(priv)) { u16 interval = 0; u32 extra; u32 suspend_time = 100; u32 scan_suspend_time = 100; unsigned long flags; IWL_DEBUG_INFO("Scanning while associated...\n"); spin_lock_irqsave(&priv->lock, flags); interval = priv->beacon_int; spin_unlock_irqrestore(&priv->lock, flags); scan->suspend_time = 0; scan->max_out_time = cpu_to_le32(200 * 1024); if (!interval) interval = suspend_time; extra = (suspend_time / interval) << 22; scan_suspend_time = (extra | ((suspend_time % interval) * 1024)); scan->suspend_time = cpu_to_le32(scan_suspend_time); IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n", scan_suspend_time, interval); } /* We should add the ability for user to lock to PASSIVE ONLY */ if (priv->one_direct_scan) { IWL_DEBUG_SCAN ("Kicking off one direct scan for '%s'\n", iwl4965_escape_essid(priv->direct_ssid, priv->direct_ssid_len)); scan->direct_scan[0].id = WLAN_EID_SSID; scan->direct_scan[0].len = priv->direct_ssid_len; memcpy(scan->direct_scan[0].ssid, priv->direct_ssid, priv->direct_ssid_len); direct_mask = 1; } else if (!iwl_is_associated(priv) && priv->essid_len) { IWL_DEBUG_SCAN ("Kicking off one direct scan for '%s' when not associated\n", iwl4965_escape_essid(priv->essid, priv->essid_len)); scan->direct_scan[0].id = WLAN_EID_SSID; scan->direct_scan[0].len = priv->essid_len; memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len); direct_mask = 1; } else { IWL_DEBUG_SCAN("Kicking off one indirect scan.\n"); direct_mask = 0; } scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; switch (priv->scan_bands) { case 2: scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; scan->tx_cmd.rate_n_flags = iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP, RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK); scan->good_CRC_th = 0; band = IEEE80211_BAND_2GHZ; break; case 1: scan->tx_cmd.rate_n_flags = iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP, RATE_MCS_ANT_B_MSK); scan->good_CRC_th = IWL_GOOD_CRC_TH; band = IEEE80211_BAND_5GHZ; break; default: IWL_WARNING("Invalid scan band count\n"); goto done; } /* We don't build a direct scan probe request; the uCode will do * that based on the direct_mask added to each channel entry */ cmd_len = iwl4965_fill_probe_req(priv, band, (struct ieee80211_mgmt *)scan->data, IWL_MAX_SCAN_SIZE - sizeof(*scan), 0); scan->tx_cmd.len = cpu_to_le16(cmd_len); /* select Rx chains */ /* Force use of chains B and C (0x6) for scan Rx. * Avoid A (0x1) because of its off-channel reception on A-band. * MIMO is not used here, but value is required to make uCode happy. */ scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK | cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) | (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) | (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS)); if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) scan->filter_flags = RXON_FILTER_PROMISC_MSK; if (direct_mask) scan->channel_count = iwl4965_get_channels_for_scan( priv, band, 1, /* active */ direct_mask, (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); else scan->channel_count = iwl4965_get_channels_for_scan( priv, band, 0, /* passive */ direct_mask, (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK); cmd.len += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct iwl4965_scan_channel); cmd.data = scan; scan->len = cpu_to_le16(cmd.len); set_bit(STATUS_SCAN_HW, &priv->status); ret = iwl_send_cmd_sync(priv, &cmd); if (ret) goto done; queue_delayed_work(priv->workqueue, &priv->scan_check, IWL_SCAN_CHECK_WATCHDOG); mutex_unlock(&priv->mutex); return; done: /* inform mac80211 scan aborted */ queue_work(priv->workqueue, &priv->scan_completed); mutex_unlock(&priv->mutex); } static void iwl4965_bg_up(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, up); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); __iwl4965_up(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_restart(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, restart); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; iwl4965_down(priv); queue_work(priv->workqueue, &priv->up); } static void iwl4965_bg_rx_replenish(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rx_replenish); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl_rx_replenish(priv); mutex_unlock(&priv->mutex); } #define IWL_DELAY_NEXT_SCAN (HZ*2) static void iwl4965_post_associate(struct iwl_priv *priv) { struct ieee80211_conf *conf = NULL; int ret = 0; DECLARE_MAC_BUF(mac); if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__); return; } IWL_DEBUG_ASSOC("Associated as %d to: %s\n", priv->assoc_id, print_mac(mac, priv->active_rxon.bssid_addr)); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!priv->vif || !priv->is_open) return; iwl4965_scan_cancel_timeout(priv, 200); conf = ieee80211_get_hw_conf(priv->hw); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd)); iwl4965_setup_rxon_timing(priv); ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (ret) IWL_WARNING("REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; #ifdef CONFIG_IWL4965_HT if (priv->current_ht_config.is_ht) iwl_set_rxon_ht(priv, &priv->current_ht_config); #endif /* CONFIG_IWL4965_HT*/ iwl_set_rxon_chain(priv); priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n", priv->assoc_id, priv->beacon_int); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } iwl4965_commit_rxon(priv); switch (priv->iw_mode) { case IEEE80211_IF_TYPE_STA: iwl4965_rate_scale_init(priv->hw, IWL_AP_ID); break; case IEEE80211_IF_TYPE_IBSS: /* clear out the station table */ iwlcore_clear_stations_table(priv); iwl_rxon_add_station(priv, iwl_bcast_addr, 0); iwl_rxon_add_station(priv, priv->bssid, 0); iwl4965_rate_scale_init(priv->hw, IWL_STA_ID); iwl4965_send_beacon_cmd(priv); break; default: IWL_ERROR("%s Should not be called in %d mode\n", __FUNCTION__, priv->iw_mode); break; } iwl4965_sequence_reset(priv); /* Enable Rx differential gain and sensitivity calibrations */ iwl_chain_noise_reset(priv); priv->start_calib = 1; if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) priv->assoc_station_added = 1; iwl4965_activate_qos(priv, 0); iwl_power_update_mode(priv, 0); /* we have just associated, don't start scan too early */ priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN; } static void iwl4965_bg_post_associate(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, post_associate.work); mutex_lock(&priv->mutex); iwl4965_post_associate(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_abort_scan(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); if (!iwl_is_ready(priv)) return; mutex_lock(&priv->mutex); set_bit(STATUS_SCAN_ABORTING, &priv->status); iwl4965_send_scan_abort(priv); mutex_unlock(&priv->mutex); } static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf); static void iwl4965_bg_scan_completed(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, scan_completed); IWL_DEBUG(IWL_DL_SCAN, "SCAN complete scan\n"); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (test_bit(STATUS_CONF_PENDING, &priv->status)) iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw)); ieee80211_scan_completed(priv->hw); /* Since setting the TXPOWER may have been deferred while * performing the scan, fire one off */ mutex_lock(&priv->mutex); iwl4965_hw_reg_send_txpower(priv); mutex_unlock(&priv->mutex); } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (2 * HZ) static int iwl4965_mac_start(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; int ret; IWL_DEBUG_MAC80211("enter\n"); if (pci_enable_device(priv->pci_dev)) { IWL_ERROR("Fail to pci_enable_device\n"); return -ENODEV; } pci_restore_state(priv->pci_dev); pci_enable_msi(priv->pci_dev); ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED, DRV_NAME, priv); if (ret) { IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } /* we should be verifying the device is ready to be opened */ mutex_lock(&priv->mutex); memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd)); /* fetch ucode file from disk, alloc and copy to bus-master buffers ... * ucode filename and max sizes are card-specific. */ if (!priv->ucode_code.len) { ret = iwl4965_read_ucode(priv); if (ret) { IWL_ERROR("Could not read microcode: %d\n", ret); mutex_unlock(&priv->mutex); goto out_release_irq; } } ret = __iwl4965_up(priv); mutex_unlock(&priv->mutex); if (ret) goto out_release_irq; IWL_DEBUG_INFO("Start UP work done.\n"); if (test_bit(STATUS_IN_SUSPEND, &priv->status)) return 0; /* Wait for START_ALIVE from ucode. Otherwise callbacks from * mac80211 will not be run successfully. */ ret = wait_event_interruptible_timeout(priv->wait_command_queue, test_bit(STATUS_READY, &priv->status), UCODE_READY_TIMEOUT); if (!ret) { if (!test_bit(STATUS_READY, &priv->status)) { IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n", jiffies_to_msecs(UCODE_READY_TIMEOUT)); ret = -ETIMEDOUT; goto out_release_irq; } } priv->is_open = 1; IWL_DEBUG_MAC80211("leave\n"); return 0; out_release_irq: free_irq(priv->pci_dev->irq, priv); out_disable_msi: pci_disable_msi(priv->pci_dev); pci_disable_device(priv->pci_dev); priv->is_open = 0; IWL_DEBUG_MAC80211("leave - failed\n"); return ret; } static void iwl4965_mac_stop(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); if (!priv->is_open) { IWL_DEBUG_MAC80211("leave - skip\n"); return; } priv->is_open = 0; if (iwl_is_ready_rf(priv)) { /* stop mac, cancel any scan request and clear * RXON_FILTER_ASSOC_MSK BIT */ mutex_lock(&priv->mutex); iwl4965_scan_cancel_timeout(priv, 100); cancel_delayed_work(&priv->post_associate); mutex_unlock(&priv->mutex); } iwl4965_down(priv); flush_workqueue(priv->workqueue); free_irq(priv->pci_dev->irq, priv); pci_disable_msi(priv->pci_dev); pci_save_state(priv->pci_dev); pci_disable_device(priv->pci_dev); IWL_DEBUG_MAC80211("leave\n"); } static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) { IWL_DEBUG_MAC80211("leave - monitor\n"); return -1; } IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (iwl_tx_skb(priv, skb)) dev_kfree_skb_any(skb); IWL_DEBUG_MAC80211("leave\n"); return 0; } static int iwl4965_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct iwl_priv *priv = hw->priv; unsigned long flags; DECLARE_MAC_BUF(mac); IWL_DEBUG_MAC80211("enter: type %d\n", conf->type); if (priv->vif) { IWL_DEBUG_MAC80211("leave - vif != NULL\n"); return -EOPNOTSUPP; } spin_lock_irqsave(&priv->lock, flags); priv->vif = conf->vif; spin_unlock_irqrestore(&priv->lock, flags); mutex_lock(&priv->mutex); if (conf->mac_addr) { IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr)); memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN); } if (iwl_is_ready(priv)) iwl4965_set_mode(priv, conf->type); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); return 0; } /** * iwl4965_mac_config - mac80211 config callback * * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to * be set inappropriately and the driver currently sets the hardware up to * use it whenever needed. */ static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf) { struct iwl_priv *priv = hw->priv; const struct iwl_channel_info *ch_info; unsigned long flags; int ret = 0; mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value); priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP); if (!iwl_is_ready(priv)) { IWL_DEBUG_MAC80211("leave - not ready\n"); ret = -EIO; goto out; } if (unlikely(!priv->cfg->mod_params->disable_hw_scan && test_bit(STATUS_SCANNING, &priv->status))) { IWL_DEBUG_MAC80211("leave - scanning\n"); set_bit(STATUS_CONF_PENDING, &priv->status); mutex_unlock(&priv->mutex); return 0; } spin_lock_irqsave(&priv->lock, flags); ch_info = iwl_get_channel_info(priv, conf->channel->band, ieee80211_frequency_to_channel(conf->channel->center_freq)); if (!is_channel_valid(ch_info)) { IWL_DEBUG_MAC80211("leave - invalid channel\n"); spin_unlock_irqrestore(&priv->lock, flags); ret = -EINVAL; goto out; } #ifdef CONFIG_IWL4965_HT /* if we are switching from ht to 2.4 clear flags * from any ht related info since 2.4 does not * support ht */ if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value) #ifdef IEEE80211_CONF_CHANNEL_SWITCH && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) #endif ) priv->staging_rxon.flags = 0; #endif /* CONFIG_IWL4965_HT */ iwl_set_rxon_channel(priv, conf->channel->band, ieee80211_frequency_to_channel(conf->channel->center_freq)); iwl4965_set_flags_for_phymode(priv, conf->channel->band); /* The list of supported rates and rate mask can be different * for each band; since the band may have changed, reset * the rate mask to what mac80211 lists */ iwl4965_set_rate(priv); spin_unlock_irqrestore(&priv->lock, flags); #ifdef IEEE80211_CONF_CHANNEL_SWITCH if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) { iwl4965_hw_channel_switch(priv, conf->channel); goto out; } #endif if (priv->cfg->ops->lib->radio_kill_sw) priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled); if (!conf->radio_enabled) { IWL_DEBUG_MAC80211("leave - radio disabled\n"); goto out; } if (iwl_is_rfkill(priv)) { IWL_DEBUG_MAC80211("leave - RF kill\n"); ret = -EIO; goto out; } iwl4965_set_rate(priv); if (memcmp(&priv->active_rxon, &priv->staging_rxon, sizeof(priv->staging_rxon))) iwl4965_commit_rxon(priv); else IWL_DEBUG_INFO("No re-sending same RXON configuration.\n"); IWL_DEBUG_MAC80211("leave\n"); out: clear_bit(STATUS_CONF_PENDING, &priv->status); mutex_unlock(&priv->mutex); return ret; } static void iwl4965_config_ap(struct iwl_priv *priv) { int ret = 0; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* The following should be done only at AP bring up */ if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) { /* RXON - unassoc (to set timing command) */ priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); /* RXON Timing */ memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd)); iwl4965_setup_rxon_timing(priv); ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (ret) IWL_WARNING("REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); iwl_set_rxon_chain(priv); /* FIXME: what should be the assoc_id for AP? */ priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); iwl4965_activate_qos(priv, 1); iwl_rxon_add_station(priv, iwl_bcast_addr, 0); } iwl4965_send_beacon_cmd(priv); /* FIXME - we need to add code here to detect a totally new * configuration, reset the AP, unassoc, rxon timing, assoc, * clear sta table, add BCAST sta... */ } static int iwl4965_mac_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_if_conf *conf) { struct iwl_priv *priv = hw->priv; DECLARE_MAC_BUF(mac); unsigned long flags; int rc; if (conf == NULL) return -EIO; if (priv->vif != vif) { IWL_DEBUG_MAC80211("leave - priv->vif != vif\n"); return 0; } if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) && (!conf->beacon || !conf->ssid_len)) { IWL_DEBUG_MAC80211 ("Leaving in AP mode because HostAPD is not ready.\n"); return 0; } if (!iwl_is_alive(priv)) return -EAGAIN; mutex_lock(&priv->mutex); if (conf->bssid) IWL_DEBUG_MAC80211("bssid: %s\n", print_mac(mac, conf->bssid)); /* * very dubious code was here; the probe filtering flag is never set: * if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) && !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) { */ if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { if (!conf->bssid) { conf->bssid = priv->mac_addr; memcpy(priv->bssid, priv->mac_addr, ETH_ALEN); IWL_DEBUG_MAC80211("bssid was set to: %s\n", print_mac(mac, conf->bssid)); } if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = conf->beacon; } if (iwl_is_rfkill(priv)) goto done; if (conf->bssid && !is_zero_ether_addr(conf->bssid) && !is_multicast_ether_addr(conf->bssid)) { /* If there is currently a HW scan going on in the background * then we need to cancel it else the RXON below will fail. */ if (iwl4965_scan_cancel_timeout(priv, 100)) { IWL_WARNING("Aborted scan still in progress " "after 100ms\n"); IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); mutex_unlock(&priv->mutex); return -EAGAIN; } memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN); /* TODO: Audit driver for usage of these members and see * if mac80211 deprecates them (priv->bssid looks like it * shouldn't be there, but I haven't scanned the IBSS code * to verify) - jpk */ memcpy(priv->bssid, conf->bssid, ETH_ALEN); if (priv->iw_mode == IEEE80211_IF_TYPE_AP) iwl4965_config_ap(priv); else { rc = iwl4965_commit_rxon(priv); if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc) iwl_rxon_add_station( priv, priv->active_rxon.bssid_addr, 1); } } else { iwl4965_scan_cancel_timeout(priv, 100); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); } done: spin_lock_irqsave(&priv->lock, flags); if (!conf->ssid_len) memset(priv->essid, 0, IW_ESSID_MAX_SIZE); else memcpy(priv->essid, conf->ssid, conf->ssid_len); priv->essid_len = conf->ssid_len; spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_MAC80211("leave\n"); mutex_unlock(&priv->mutex); return 0; } static void iwl4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, int mc_count, struct dev_addr_list *mc_list) { /* * XXX: dummy * see also iwl4965_connection_init_rx_config */ struct iwl_priv *priv = hw->priv; int new_flags = 0; if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) { if (*total_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) { IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n", IEEE80211_IF_TYPE_MNTR, changed_flags, *total_flags); /* queue work 'cuz mac80211 is holding a lock which * prevents us from issuing (synchronous) f/w cmds */ queue_work(priv->workqueue, &priv->set_monitor); new_flags &= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS | FIF_ALLMULTI; } } *total_flags = new_flags; } static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); mutex_lock(&priv->mutex); if (iwl_is_ready_rf(priv)) { iwl4965_scan_cancel_timeout(priv, 100); cancel_delayed_work(&priv->post_associate); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); } if (priv->vif == conf->vif) { priv->vif = NULL; memset(priv->bssid, 0, ETH_ALEN); memset(priv->essid, 0, IW_ESSID_MAX_SIZE); priv->essid_len = 0; } mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); } #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6) static void iwl4965_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changes) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("changes = 0x%X\n", changes); if (changes & BSS_CHANGED_ERP_PREAMBLE) { IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble); if (bss_conf->use_short_preamble) priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; } if (changes & BSS_CHANGED_ERP_CTS_PROT) { IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot); if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ)) priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK; } if (changes & BSS_CHANGED_HT) { IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht); iwl4965_ht_conf(priv, bss_conf); iwl_set_rxon_chain(priv); } if (changes & BSS_CHANGED_ASSOC) { IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc); /* This should never happen as this function should * never be called from interrupt context. */ if (WARN_ON_ONCE(in_interrupt())) return; if (bss_conf->assoc) { priv->assoc_id = bss_conf->aid; priv->beacon_int = bss_conf->beacon_int; priv->timestamp = bss_conf->timestamp; priv->assoc_capability = bss_conf->assoc_capability; priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN_AFTER_ASSOC; mutex_lock(&priv->mutex); iwl4965_post_associate(priv); mutex_unlock(&priv->mutex); } else { priv->assoc_id = 0; IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc); } } else if (changes && iwl_is_associated(priv) && priv->assoc_id) { IWL_DEBUG_MAC80211("Associated Changes %d\n", changes); iwl_send_rxon_assoc(priv); } } static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len) { int rc = 0; unsigned long flags; struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); mutex_lock(&priv->mutex); spin_lock_irqsave(&priv->lock, flags); if (!iwl_is_ready_rf(priv)) { rc = -EIO; IWL_DEBUG_MAC80211("leave - not ready or exit pending\n"); goto out_unlock; } if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */ rc = -EIO; IWL_ERROR("ERROR: APs don't scan\n"); goto out_unlock; } /* we don't schedule scan within next_scan_jiffies period */ if (priv->next_scan_jiffies && time_after(priv->next_scan_jiffies, jiffies)) { rc = -EAGAIN; goto out_unlock; } /* if we just finished scan ask for delay */ if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) { rc = -EAGAIN; goto out_unlock; } if (len) { IWL_DEBUG_SCAN("direct scan for %s [%d]\n ", iwl4965_escape_essid(ssid, len), (int)len); priv->one_direct_scan = 1; priv->direct_ssid_len = (u8) min((u8) len, (u8) IW_ESSID_MAX_SIZE); memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); } else priv->one_direct_scan = 0; rc = iwl4965_scan_initiate(priv); IWL_DEBUG_MAC80211("leave\n"); out_unlock: spin_unlock_irqrestore(&priv->lock, flags); mutex_unlock(&priv->mutex); return rc; } static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_key_conf *keyconf, const u8 *addr, u32 iv32, u16 *phase1key) { struct iwl_priv *priv = hw->priv; u8 sta_id = IWL_INVALID_STATION; unsigned long flags; __le16 key_flags = 0; int i; DECLARE_MAC_BUF(mac); IWL_DEBUG_MAC80211("enter\n"); sta_id = iwl_find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211("leave - %s not in station map.\n", print_mac(mac, addr)); return; } iwl4965_scan_cancel_timeout(priv, 100); key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK); key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags &= ~STA_KEY_FLG_INVALID; if (sta_id == priv->hw_params.bcast_sta_id) key_flags |= STA_KEY_MULTICAST_MSK; spin_lock_irqsave(&priv->sta_lock, flags); priv->stations[sta_id].sta.key.key_flags = key_flags; priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32; for (i = 0; i < 5; i++) priv->stations[sta_id].sta.key.tkip_rx_ttak[i] = cpu_to_le16(phase1key[i]); priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC); spin_unlock_irqrestore(&priv->sta_lock, flags); IWL_DEBUG_MAC80211("leave\n"); } static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, const u8 *local_addr, const u8 *addr, struct ieee80211_key_conf *key) { struct iwl_priv *priv = hw->priv; DECLARE_MAC_BUF(mac); int ret = 0; u8 sta_id = IWL_INVALID_STATION; u8 is_default_wep_key = 0; IWL_DEBUG_MAC80211("enter\n"); if (priv->hw_params.sw_crypto) { IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } if (is_zero_ether_addr(addr)) /* only support pairwise keys */ return -EOPNOTSUPP; sta_id = iwl_find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211("leave - %s not in station map.\n", print_mac(mac, addr)); return -EINVAL; } mutex_lock(&priv->mutex); iwl4965_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); /* If we are getting WEP group key and we didn't receive any key mapping * so far, we are in legacy wep mode (group key only), otherwise we are * in 1X mode. * In legacy wep mode, we use another host command to the uCode */ if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id && priv->iw_mode != IEEE80211_IF_TYPE_AP) { if (cmd == SET_KEY) is_default_wep_key = !priv->key_mapping_key; else is_default_wep_key = (key->hw_key_idx == HW_KEY_DEFAULT); } switch (cmd) { case SET_KEY: if (is_default_wep_key) ret = iwl_set_default_wep_key(priv, key); else ret = iwl_set_dynamic_key(priv, key, sta_id); IWL_DEBUG_MAC80211("enable hwcrypto key\n"); break; case DISABLE_KEY: if (is_default_wep_key) ret = iwl_remove_default_wep_key(priv, key); else ret = iwl_remove_dynamic_key(priv, key, sta_id); IWL_DEBUG_MAC80211("disable hwcrypto key\n"); break; default: ret = -EINVAL; } IWL_DEBUG_MAC80211("leave\n"); return ret; } static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { struct iwl_priv *priv = hw->priv; unsigned long flags; int q; IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); return -EIO; } if (queue >= AC_NUM) { IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue); return 0; } if (!priv->qos_data.qos_enable) { priv->qos_data.qos_active = 0; IWL_DEBUG_MAC80211("leave - qos not enabled\n"); return 0; } q = AC_NUM - 1 - queue; spin_lock_irqsave(&priv->lock, flags); priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min); priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max); priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; priv->qos_data.def_qos_parm.ac[q].edca_txop = cpu_to_le16((params->txop * 32)); priv->qos_data.def_qos_parm.ac[q].reserved1 = 0; priv->qos_data.qos_active = 1; spin_unlock_irqrestore(&priv->lock, flags); mutex_lock(&priv->mutex); if (priv->iw_mode == IEEE80211_IF_TYPE_AP) iwl4965_activate_qos(priv, 1); else if (priv->assoc_id && iwl_is_associated(priv)) iwl4965_activate_qos(priv, 0); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); return 0; } static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw, struct ieee80211_tx_queue_stats *stats) { struct iwl_priv *priv = hw->priv; int i, avail; struct iwl_tx_queue *txq; struct iwl_queue *q; unsigned long flags; IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); return -EIO; } spin_lock_irqsave(&priv->lock, flags); for (i = 0; i < AC_NUM; i++) { txq = &priv->txq[i]; q = &txq->q; avail = iwl_queue_space(q); stats[i].len = q->n_window - avail; stats[i].limit = q->n_window - q->high_mark; stats[i].count = q->n_window; } spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_MAC80211("leave\n"); return 0; } static int iwl4965_mac_get_stats(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats) { struct iwl_priv *priv = hw->priv; priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); IWL_DEBUG_MAC80211("leave\n"); return 0; } static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw) { struct iwl_priv *priv; priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); IWL_DEBUG_MAC80211("leave\n"); return 0; } static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; unsigned long flags; mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211("enter\n"); priv->lq_mngr.lq_ready = 0; #ifdef CONFIG_IWL4965_HT spin_lock_irqsave(&priv->lock, flags); memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info)); spin_unlock_irqrestore(&priv->lock, flags); #endif /* CONFIG_IWL4965_HT */ iwl_reset_qos(priv); cancel_delayed_work(&priv->post_associate); spin_lock_irqsave(&priv->lock, flags); priv->assoc_id = 0; priv->assoc_capability = 0; priv->assoc_station_added = 0; /* new association get rid of ibss beacon skb */ if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; priv->beacon_int = priv->hw->conf.beacon_int; priv->timestamp = 0; if ((priv->iw_mode == IEEE80211_IF_TYPE_STA)) priv->beacon_int = 0; spin_unlock_irqrestore(&priv->lock, flags); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - not ready\n"); mutex_unlock(&priv->mutex); return; } /* we are restarting association process * clear RXON_FILTER_ASSOC_MSK bit */ if (priv->iw_mode != IEEE80211_IF_TYPE_AP) { iwl4965_scan_cancel_timeout(priv, 100); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl4965_commit_rxon(priv); } iwl_power_update_mode(priv, 0); /* Per mac80211.h: This is only used in IBSS mode... */ if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) { IWL_DEBUG_MAC80211("leave - not in IBSS\n"); mutex_unlock(&priv->mutex); return; } iwl4965_set_rate(priv); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); } static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; unsigned long flags; mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); mutex_unlock(&priv->mutex); return -EIO; } if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) { IWL_DEBUG_MAC80211("leave - not IBSS\n"); mutex_unlock(&priv->mutex); return -EIO; } spin_lock_irqsave(&priv->lock, flags); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = skb; priv->assoc_id = 0; IWL_DEBUG_MAC80211("leave\n"); spin_unlock_irqrestore(&priv->lock, flags); iwl_reset_qos(priv); queue_work(priv->workqueue, &priv->post_associate.work); mutex_unlock(&priv->mutex); return 0; } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLWIFI_DEBUG /* * The following adds a new attribute to the sysfs representation * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/) * used for controlling the debug level. * * See the level definitions in iwl for details. */ static ssize_t show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = d->driver_data; return sprintf(buf, "0x%08X\n", priv->debug_level); } static ssize_t store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = d->driver_data; char *p = (char *)buf; u32 val; val = simple_strtoul(p, &p, 0); if (p == buf) printk(KERN_INFO DRV_NAME ": %s is not in hex or decimal form.\n", buf); else priv->debug_level = val; return strnlen(buf, count); } static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, show_debug_level, store_debug_level); #endif /* CONFIG_IWLWIFI_DEBUG */ static ssize_t show_version(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = d->driver_data; struct iwl4965_alive_resp *palive = &priv->card_alive; if (palive->is_valid) return sprintf(buf, "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n" "fw type: 0x%01X 0x%01X\n", palive->ucode_major, palive->ucode_minor, palive->sw_rev[0], palive->sw_rev[1], palive->ver_type, palive->ver_subtype); else return sprintf(buf, "fw not loaded\n"); } static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL); static ssize_t show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv)); } static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL); static ssize_t show_rs_window(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = d->driver_data; return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID); } static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL); static ssize_t show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "%d\n", priv->user_txpower_limit); } static ssize_t store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; char *p = (char *)buf; u32 val; val = simple_strtoul(p, &p, 10); if (p == buf) printk(KERN_INFO DRV_NAME ": %s is not in decimal form.\n", buf); else iwl4965_hw_reg_set_txpower(priv, val); return count; } static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power); static ssize_t show_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "0x%04X\n", priv->active_rxon.flags); } static ssize_t store_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; u32 flags = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging_rxon.flags) != flags) { /* Cancel any currently running scans... */ if (iwl4965_scan_cancel_timeout(priv, 100)) IWL_WARNING("Could not cancel scan.\n"); else { IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n", flags); priv->staging_rxon.flags = cpu_to_le32(flags); iwl4965_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags); static ssize_t show_filter_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "0x%04X\n", le32_to_cpu(priv->active_rxon.filter_flags)); } static ssize_t store_filter_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; u32 filter_flags = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) { /* Cancel any currently running scans... */ if (iwl4965_scan_cancel_timeout(priv, 100)) IWL_WARNING("Could not cancel scan.\n"); else { IWL_DEBUG_INFO("Committing rxon.filter_flags = " "0x%04X\n", filter_flags); priv->staging_rxon.filter_flags = cpu_to_le32(filter_flags); iwl4965_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags, store_filter_flags); #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT static ssize_t show_measurement(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); struct iwl4965_spectrum_notification measure_report; u32 size = sizeof(measure_report), len = 0, ofs = 0; u8 *data = (u8 *) & measure_report; unsigned long flags; spin_lock_irqsave(&priv->lock, flags); if (!(priv->measurement_status & MEASUREMENT_READY)) { spin_unlock_irqrestore(&priv->lock, flags); return 0; } memcpy(&measure_report, &priv->measure_report, size); priv->measurement_status = 0; spin_unlock_irqrestore(&priv->lock, flags); while (size && (PAGE_SIZE - len)) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, 1); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static ssize_t store_measurement(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); struct ieee80211_measurement_params params = { .channel = le16_to_cpu(priv->active_rxon.channel), .start_time = cpu_to_le64(priv->last_tsf), .duration = cpu_to_le16(1), }; u8 type = IWL_MEASURE_BASIC; u8 buffer[32]; u8 channel; if (count) { char *p = buffer; strncpy(buffer, buf, min(sizeof(buffer), count)); channel = simple_strtoul(p, NULL, 0); if (channel) params.channel = channel; p = buffer; while (*p && *p != ' ') p++; if (*p) type = simple_strtoul(p + 1, NULL, 0); } IWL_DEBUG_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n", type, params.channel, buf); iwl4965_get_measurement(priv, ¶ms, type); return count; } static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, show_measurement, store_measurement); #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */ static ssize_t store_retry_rate(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); priv->retry_rate = simple_strtoul(buf, NULL, 0); if (priv->retry_rate <= 0) priv->retry_rate = 1; return count; } static ssize_t show_retry_rate(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "%d", priv->retry_rate); } static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate, store_retry_rate); static ssize_t store_power_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); int rc; int mode; mode = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (!iwl_is_ready(priv)) { rc = -EAGAIN; goto out; } rc = iwl_power_set_user_mode(priv, mode); if (rc) { IWL_DEBUG_MAC80211("failed setting power mode.\n"); goto out; } rc = count; out: mutex_unlock(&priv->mutex); return rc; } #define MAX_WX_STRING 80 /* Values are in microsecond */ static const s32 timeout_duration[] = { 350000, 250000, 75000, 37000, 25000, }; static const s32 period_duration[] = { 400000, 700000, 1000000, 1000000, 1000000 }; static ssize_t show_power_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); int level = priv->power_data.power_mode; char *p = buf; p += sprintf(p, "%d ", level); switch (level) { case IWL_POWER_MODE_CAM: case IWL_POWER_AC: p += sprintf(p, "(AC)"); break; case IWL_POWER_BATTERY: p += sprintf(p, "(BATTERY)"); break; default: p += sprintf(p, "(Timeout %dms, Period %dms)", timeout_duration[level - 1] / 1000, period_duration[level - 1] / 1000); } /* if (!(priv->power_mode & IWL_POWER_ENABLED)) p += sprintf(p, " OFF\n"); else p += sprintf(p, " \n"); */ p += sprintf(p, " \n"); return (p - buf + 1); } static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level, store_power_level); static ssize_t show_channels(struct device *d, struct device_attribute *attr, char *buf) { /* all this shit doesn't belong into sysfs anyway */ return 0; } static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL); static ssize_t show_statistics(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); u32 size = sizeof(struct iwl4965_notif_statistics); u32 len = 0, ofs = 0; u8 *data = (u8 *) & priv->statistics; int rc = 0; if (!iwl_is_alive(priv)) return -EAGAIN; mutex_lock(&priv->mutex); rc = iwl_send_statistics_request(priv, 0); mutex_unlock(&priv->mutex); if (rc) { len = sprintf(buf, "Error sending statistics request: 0x%08X\n", rc); return len; } while (size && (PAGE_SIZE - len)) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, 1); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL); static ssize_t show_status(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "0x%08x\n", (int)priv->status); } static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); /***************************************************************************** * * driver setup and teardown * *****************************************************************************/ static void iwl4965_setup_deferred_work(struct iwl_priv *priv) { priv->workqueue = create_workqueue(DRV_NAME); init_waitqueue_head(&priv->wait_command_queue); INIT_WORK(&priv->up, iwl4965_bg_up); INIT_WORK(&priv->restart, iwl4965_bg_restart); INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish); INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed); INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan); INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan); INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill); INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update); INIT_WORK(&priv->set_monitor, iwl4965_bg_set_monitor); INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate); INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start); INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start); INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check); iwl4965_hw_setup_deferred_work(priv); tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl4965_irq_tasklet, (unsigned long)priv); } static void iwl4965_cancel_deferred_work(struct iwl_priv *priv) { iwl4965_hw_cancel_deferred_work(priv); cancel_delayed_work_sync(&priv->init_alive_start); cancel_delayed_work(&priv->scan_check); cancel_delayed_work(&priv->alive_start); cancel_delayed_work(&priv->post_associate); cancel_work_sync(&priv->beacon_update); } static struct attribute *iwl4965_sysfs_entries[] = { &dev_attr_channels.attr, &dev_attr_flags.attr, &dev_attr_filter_flags.attr, #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT &dev_attr_measurement.attr, #endif &dev_attr_power_level.attr, &dev_attr_retry_rate.attr, &dev_attr_rs_window.attr, &dev_attr_statistics.attr, &dev_attr_status.attr, &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWLWIFI_DEBUG &dev_attr_debug_level.attr, #endif &dev_attr_version.attr, NULL }; static struct attribute_group iwl4965_attribute_group = { .name = NULL, /* put in device directory */ .attrs = iwl4965_sysfs_entries, }; static struct ieee80211_ops iwl4965_hw_ops = { .tx = iwl4965_mac_tx, .start = iwl4965_mac_start, .stop = iwl4965_mac_stop, .add_interface = iwl4965_mac_add_interface, .remove_interface = iwl4965_mac_remove_interface, .config = iwl4965_mac_config, .config_interface = iwl4965_mac_config_interface, .configure_filter = iwl4965_configure_filter, .set_key = iwl4965_mac_set_key, .update_tkip_key = iwl4965_mac_update_tkip_key, .get_stats = iwl4965_mac_get_stats, .get_tx_stats = iwl4965_mac_get_tx_stats, .conf_tx = iwl4965_mac_conf_tx, .get_tsf = iwl4965_mac_get_tsf, .reset_tsf = iwl4965_mac_reset_tsf, .beacon_update = iwl4965_mac_beacon_update, .bss_info_changed = iwl4965_bss_info_changed, #ifdef CONFIG_IWL4965_HT .ampdu_action = iwl4965_mac_ampdu_action, #endif /* CONFIG_IWL4965_HT */ .hw_scan = iwl4965_mac_hw_scan }; static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0; struct iwl_priv *priv; struct ieee80211_hw *hw; struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data); unsigned long flags; DECLARE_MAC_BUF(mac); /************************ * 1. Allocating HW data ************************/ /* Disabling hardware scan means that mac80211 will perform scans * "the hard way", rather than using device's scan. */ if (cfg->mod_params->disable_hw_scan) { if (cfg->mod_params->debug & IWL_DL_INFO) dev_printk(KERN_DEBUG, &(pdev->dev), "Disabling hw_scan\n"); iwl4965_hw_ops.hw_scan = NULL; } hw = iwl_alloc_all(cfg, &iwl4965_hw_ops); if (!hw) { err = -ENOMEM; goto out; } priv = hw->priv; /* At this point both hw and priv are allocated. */ SET_IEEE80211_DEV(hw, &pdev->dev); IWL_DEBUG_INFO("*** LOAD DRIVER ***\n"); priv->cfg = cfg; priv->pci_dev = pdev; #ifdef CONFIG_IWLWIFI_DEBUG priv->debug_level = priv->cfg->mod_params->debug; atomic_set(&priv->restrict_refcnt, 0); #endif /************************** * 2. Initializing PCI bus **************************/ if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); if (err) { err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); /* both attempts failed: */ if (err) { printk(KERN_WARNING "%s: No suitable DMA available.\n", DRV_NAME); goto out_pci_disable_device; } } err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; pci_set_drvdata(pdev, priv); /* We disable the RETRY_TIMEOUT register (0x41) to keep * PCI Tx retries from interfering with C3 CPU state */ pci_write_config_byte(pdev, 0x41, 0x00); /*********************** * 3. Read REV register ***********************/ priv->hw_base = pci_iomap(pdev, 0, 0); if (!priv->hw_base) { err = -ENODEV; goto out_pci_release_regions; } IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n", (unsigned long long) pci_resource_len(pdev, 0)); IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base); iwl_hw_detect(priv); printk(KERN_INFO DRV_NAME ": Detected Intel Wireless WiFi Link %s REV=0x%X\n", priv->cfg->name, priv->hw_rev); /* amp init */ err = priv->cfg->ops->lib->apm_ops.init(priv); if (err < 0) { IWL_DEBUG_INFO("Failed to init APMG\n"); goto out_iounmap; } /***************** * 4. Read EEPROM *****************/ /* Read the EEPROM */ err = iwl_eeprom_init(priv); if (err) { IWL_ERROR("Unable to init EEPROM\n"); goto out_iounmap; } err = iwl_eeprom_check_version(priv); if (err) goto out_iounmap; /* extract MAC Address */ iwl_eeprom_get_mac(priv, priv->mac_addr); IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr)); SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr); /************************ * 5. Setup HW constants ************************/ /* Device-specific setup */ if (priv->cfg->ops->lib->set_hw_params(priv)) { IWL_ERROR("failed to set hw parameters\n"); goto out_free_eeprom; } /******************* * 6. Setup priv *******************/ err = iwl_init_drv(priv); if (err) goto out_free_eeprom; /* At this point both hw and priv are initialized. */ /********************************** * 7. Initialize module parameters **********************************/ /* Disable radio (SW RF KILL) via parameter when loading driver */ if (priv->cfg->mod_params->disable) { set_bit(STATUS_RF_KILL_SW, &priv->status); IWL_DEBUG_INFO("Radio disabled.\n"); } /******************** * 8. Setup services ********************/ spin_lock_irqsave(&priv->lock, flags); iwl4965_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group); if (err) { IWL_ERROR("failed to create sysfs device attributes\n"); goto out_uninit_drv; } iwl4965_setup_deferred_work(priv); iwl4965_setup_rx_handlers(priv); /******************** * 9. Conclude ********************/ pci_save_state(pdev); pci_disable_device(pdev); /********************************** * 10. Setup and register mac80211 **********************************/ err = iwl_setup_mac(priv); if (err) goto out_remove_sysfs; err = iwl_dbgfs_register(priv, DRV_NAME); if (err) IWL_ERROR("failed to create debugfs files\n"); /* notify iwlcore to init */ iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT); return 0; out_remove_sysfs: sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group); out_uninit_drv: iwl_uninit_drv(priv); out_free_eeprom: iwl_eeprom_free(priv); out_iounmap: pci_iounmap(pdev, priv->hw_base); out_pci_release_regions: pci_release_regions(pdev); pci_set_drvdata(pdev, NULL); out_pci_disable_device: pci_disable_device(pdev); out_ieee80211_free_hw: ieee80211_free_hw(priv->hw); out: return err; } static void __devexit iwl4965_pci_remove(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); struct list_head *p, *q; int i; unsigned long flags; if (!priv) return; IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n"); if (priv->mac80211_registered) { ieee80211_unregister_hw(priv->hw); priv->mac80211_registered = 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); iwl4965_down(priv); /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&priv->lock, flags); iwl4965_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); /* Free MAC hash list for ADHOC */ for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) { list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) { list_del(p); kfree(list_entry(p, struct iwl4965_ibss_seq, list)); } } iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT); iwl_dbgfs_unregister(priv); sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group); iwl4965_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwl_rx_queue_free(priv, &priv->rxq); iwl_hw_txq_ctx_free(priv); iwlcore_clear_stations_table(priv); iwl_eeprom_free(priv); /*netif_stop_queue(dev); */ flush_workqueue(priv->workqueue); /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes * priv->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(priv->workqueue); priv->workqueue = NULL; pci_iounmap(pdev, priv->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); iwl_uninit_drv(priv); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); ieee80211_free_hw(priv->hw); } #ifdef CONFIG_PM static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state) { struct iwl_priv *priv = pci_get_drvdata(pdev); if (priv->is_open) { set_bit(STATUS_IN_SUSPEND, &priv->status); iwl4965_mac_stop(priv->hw); priv->is_open = 1; } pci_set_power_state(pdev, PCI_D3hot); return 0; } static int iwl4965_pci_resume(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); pci_set_power_state(pdev, PCI_D0); if (priv->is_open) iwl4965_mac_start(priv->hw); clear_bit(STATUS_IN_SUSPEND, &priv->status); return 0; } #endif /* CONFIG_PM */ /***************************************************************************** * * driver and module entry point * *****************************************************************************/ /* Hardware specific file defines the PCI IDs table for that hardware module */ static struct pci_device_id iwl_hw_card_ids[] = { {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)}, {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)}, #ifdef CONFIG_IWL5000 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)}, {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)}, {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)}, #endif /* CONFIG_IWL5000 */ {0} }; MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids); static struct pci_driver iwl_driver = { .name = DRV_NAME, .id_table = iwl_hw_card_ids, .probe = iwl4965_pci_probe, .remove = __devexit_p(iwl4965_pci_remove), #ifdef CONFIG_PM .suspend = iwl4965_pci_suspend, .resume = iwl4965_pci_resume, #endif }; static int __init iwl4965_init(void) { int ret; printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); ret = iwl4965_rate_control_register(); if (ret) { IWL_ERROR("Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&iwl_driver); if (ret) { IWL_ERROR("Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: iwl4965_rate_control_unregister(); return ret; } static void __exit iwl4965_exit(void) { pci_unregister_driver(&iwl_driver); iwl4965_rate_control_unregister(); } module_exit(iwl4965_exit); module_init(iwl4965_init);