/****************************************************************************** * * Copyright(c) 2003 - 2009 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: * Intel Linux Wireless * 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 #define DRV_NAME "iwl3945" #include "iwl-fh.h" #include "iwl-3945-fh.h" #include "iwl-commands.h" #include "iwl-sta.h" #include "iwl-3945.h" #include "iwl-helpers.h" #include "iwl-core.h" #include "iwl-dev.h" /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION \ "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux" #ifdef CONFIG_IWLWIFI_DEBUG #define VD "d" #else #define VD #endif #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT #define VS "s" #else #define VS #endif #define IWL39_VERSION "1.2.26k" VD VS #define DRV_COPYRIGHT "Copyright(c) 2003-2009 Intel Corporation" #define DRV_AUTHOR "" #define DRV_VERSION IWL39_VERSION MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); /* module parameters */ struct iwl_mod_params iwl3945_mod_params = { .num_of_queues = IWL39_NUM_QUEUES, /* Not used */ .sw_crypto = 1, .restart_fw = 1, /* the rest are 0 by default */ }; /** * iwl3945_get_antenna_flags - Get antenna flags for RXON command * @priv: eeprom and antenna fields are used to determine antenna flags * * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed * iwl3945_mod_params.antenna specifies the antenna diversity mode: * * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself * IWL_ANTENNA_MAIN - Force MAIN antenna * IWL_ANTENNA_AUX - Force AUX antenna */ __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv) { struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom; switch (iwl3945_mod_params.antenna) { case IWL_ANTENNA_DIVERSITY: return 0; case IWL_ANTENNA_MAIN: if (eeprom->antenna_switch_type) return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK; return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK; case IWL_ANTENNA_AUX: if (eeprom->antenna_switch_type) return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK; return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK; } /* bad antenna selector value */ IWL_ERR(priv, "Bad antenna selector value (0x%x)\n", iwl3945_mod_params.antenna); return 0; /* "diversity" is default if error */ } static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; __le16 key_flags = 0; int ret; key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK); key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); if (sta_id == priv->hw_params.bcast_sta_id) key_flags |= STA_KEY_MULTICAST_MSK; keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; keyconf->hw_key_idx = keyconf->keyidx; key_flags &= ~STA_KEY_FLG_INVALID; spin_lock_irqsave(&priv->sta_lock, flags); priv->stations[sta_id].keyinfo.alg = keyconf->alg; priv->stations[sta_id].keyinfo.keylen = keyconf->keylen; memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) priv->stations[sta_id].sta.key.key_offset = iwl_get_free_ucode_key_index(priv); /* else, we are overriding an existing key => no need to allocated room * in uCode. */ WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, "no space for a new key"); priv->stations[sta_id].sta.key.key_flags = key_flags; priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n"); ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC); spin_unlock_irqrestore(&priv->sta_lock, flags); return ret; } static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id) { return -EOPNOTSUPP; } static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id) { return -EOPNOTSUPP; } static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id) { unsigned long flags; spin_lock_irqsave(&priv->sta_lock, flags); memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key)); memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo)); priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC; priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; spin_unlock_irqrestore(&priv->sta_lock, flags); IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n"); iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0); return 0; } static int iwl3945_set_dynamic_key(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id) { int ret = 0; keyconf->hw_key_idx = HW_KEY_DYNAMIC; switch (keyconf->alg) { case ALG_CCMP: ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id); break; case ALG_TKIP: ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id); break; case ALG_WEP: ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id); break; default: IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg); ret = -EINVAL; } IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n", keyconf->alg, keyconf->keylen, keyconf->keyidx, sta_id, ret); return ret; } static int iwl3945_remove_static_key(struct iwl_priv *priv) { int ret = -EOPNOTSUPP; return ret; } static int iwl3945_set_static_key(struct iwl_priv *priv, struct ieee80211_key_conf *key) { if (key->alg == ALG_WEP) return -EOPNOTSUPP; IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg); return -EINVAL; } static void iwl3945_clear_free_frames(struct iwl_priv *priv) { struct list_head *element; IWL_DEBUG_INFO(priv, "%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 iwl3945_frame, list)); priv->frames_count--; } if (priv->frames_count) { IWL_WARN(priv, "%d frames still in use. Did we lose one?\n", priv->frames_count); priv->frames_count = 0; } } static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv) { struct iwl3945_frame *frame; struct list_head *element; if (list_empty(&priv->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IWL_ERR(priv, "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 iwl3945_frame, list); } static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &priv->free_frames); } unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv, struct ieee80211_hdr *hdr, int left) { if (!iwl_is_associated(priv) || !priv->ibss_beacon || ((priv->iw_mode != NL80211_IFTYPE_ADHOC) && (priv->iw_mode != NL80211_IFTYPE_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 int iwl3945_send_beacon_cmd(struct iwl_priv *priv) { struct iwl3945_frame *frame; unsigned int frame_size; int rc; u8 rate; frame = iwl3945_get_free_frame(priv); if (!frame) { IWL_ERR(priv, "Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } rate = iwl_rate_get_lowest_plcp(priv); frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate); rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, &frame->u.cmd[0]); iwl3945_free_frame(priv, frame); return rc; } static void iwl3945_unset_hw_params(struct iwl_priv *priv) { if (priv->shared_virt) pci_free_consistent(priv->pci_dev, sizeof(struct iwl3945_shared), priv->shared_virt, priv->shared_phys); } static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv, struct ieee80211_tx_info *info, struct iwl_device_cmd *cmd, struct sk_buff *skb_frag, int sta_id) { struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload; struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo; switch (keyinfo->alg) { case ALG_CCMP: tx->sec_ctl = TX_CMD_SEC_CCM; memcpy(tx->key, keyinfo->key, keyinfo->keylen); IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); break; case ALG_TKIP: break; case ALG_WEP: tx->sec_ctl = TX_CMD_SEC_WEP | (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT; if (keyinfo->keylen == 13) tx->sec_ctl |= TX_CMD_SEC_KEY128; memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen); IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " "with key %d\n", info->control.hw_key->hw_key_idx); break; default: IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg); break; } } /* * handle build REPLY_TX command notification. */ static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv, struct iwl_device_cmd *cmd, struct ieee80211_tx_info *info, struct ieee80211_hdr *hdr, u8 std_id) { struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload; __le32 tx_flags = tx->tx_flags; __le16 fc = hdr->frame_control; u8 rc_flags = info->control.rates[0].flags; tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { tx_flags |= TX_CMD_FLG_ACK_MSK; if (ieee80211_is_mgmt(fc)) tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; if (ieee80211_is_probe_resp(fc) && !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) tx_flags |= TX_CMD_FLG_TSF_MSK; } else { tx_flags &= (~TX_CMD_FLG_ACK_MSK); tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } tx->sta_id = std_id; if (ieee80211_has_morefrags(fc)) tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; if (ieee80211_is_data_qos(fc)) { u8 *qc = ieee80211_get_qos_ctl(hdr); tx->tid_tspec = qc[0] & 0xf; tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; } else { tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { tx_flags |= TX_CMD_FLG_RTS_MSK; tx_flags &= ~TX_CMD_FLG_CTS_MSK; } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { tx_flags &= ~TX_CMD_FLG_RTS_MSK; tx_flags |= TX_CMD_FLG_CTS_MSK; } if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK)) tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); if (ieee80211_is_mgmt(fc)) { if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) tx->timeout.pm_frame_timeout = cpu_to_le16(3); else tx->timeout.pm_frame_timeout = cpu_to_le16(2); } else { tx->timeout.pm_frame_timeout = 0; #ifdef CONFIG_IWLWIFI_LEDS priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len); #endif } tx->driver_txop = 0; tx->tx_flags = tx_flags; tx->next_frame_len = 0; } /* * start REPLY_TX command process */ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl3945_tx_cmd *tx; struct iwl_tx_queue *txq = NULL; struct iwl_queue *q = NULL; struct iwl_device_cmd *out_cmd; struct iwl_cmd_meta *out_meta; dma_addr_t phys_addr; dma_addr_t txcmd_phys; int txq_id = skb_get_queue_mapping(skb); u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */ u8 id; u8 unicast; u8 sta_id; u8 tid = 0; u16 seq_number = 0; __le16 fc; u8 wait_write_ptr = 0; u8 *qc = NULL; unsigned long flags; int rc; spin_lock_irqsave(&priv->lock, flags); if (iwl_is_rfkill(priv)) { IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); goto drop_unlock; } if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) { IWL_ERR(priv, "ERROR: No TX rate available.\n"); goto drop_unlock; } unicast = !is_multicast_ether_addr(hdr->addr1); id = 0; fc = hdr->frame_control; #ifdef CONFIG_IWLWIFI_DEBUG if (ieee80211_is_auth(fc)) IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); else if (ieee80211_is_assoc_req(fc)) IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); else if (ieee80211_is_reassoc_req(fc)) IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); #endif /* drop all non-injected data frame if we are not associated */ if (ieee80211_is_data(fc) && !(info->flags & IEEE80211_TX_CTL_INJECTED) && (!iwl_is_associated(priv) || ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) { IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n"); goto drop_unlock; } spin_unlock_irqrestore(&priv->lock, flags); hdr_len = ieee80211_hdrlen(fc); /* Find (or create) index into station table for destination station */ if (info->flags & IEEE80211_TX_CTL_INJECTED) sta_id = priv->hw_params.bcast_sta_id; else sta_id = iwl_get_sta_id(priv, hdr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", hdr->addr1); goto drop; } IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id); if (ieee80211_is_data_qos(fc)) { qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; if (unlikely(tid >= MAX_TID_COUNT)) goto drop; seq_number = priv->stations[sta_id].tid[tid].seq_number & IEEE80211_SCTL_SEQ; hdr->seq_ctrl = cpu_to_le16(seq_number) | (hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)); seq_number += 0x10; } /* Descriptor for chosen Tx queue */ txq = &priv->txq[txq_id]; q = &txq->q; spin_lock_irqsave(&priv->lock, flags); idx = get_cmd_index(q, q->write_ptr, 0); /* Set up driver data for this TFD */ memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); txq->txb[q->write_ptr].skb[0] = skb; /* Init first empty entry in queue's array of Tx/cmd buffers */ out_cmd = txq->cmd[idx]; out_meta = &txq->meta[idx]; tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload; memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); memset(tx, 0, sizeof(*tx)); /* * Set up the Tx-command (not MAC!) header. * Store the chosen Tx queue and TFD index within the sequence field; * after Tx, uCode's Tx response will return this value so driver can * locate the frame within the tx queue and do post-tx processing. */ out_cmd->hdr.cmd = REPLY_TX; out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | INDEX_TO_SEQ(q->write_ptr))); /* Copy MAC header from skb into command buffer */ memcpy(tx->hdr, hdr, hdr_len); if (info->control.hw_key) iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id); /* TODO need this for burst mode later on */ iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id); /* set is_hcca to 0; it probably will never be implemented */ iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0); /* Total # bytes to be transmitted */ len = (u16)skb->len; tx->len = cpu_to_le16(len); iwl_dbg_log_tx_data_frame(priv, len, hdr); iwl_update_stats(priv, true, fc, len); tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; if (!ieee80211_has_morefrags(hdr->frame_control)) { txq->need_update = 1; if (qc) priv->stations[sta_id].tid[tid].seq_number = seq_number; } else { wait_write_ptr = 1; txq->need_update = 0; } IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n", le16_to_cpu(out_cmd->hdr.sequence)); IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags)); iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx)); iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr, ieee80211_hdrlen(fc)); /* * Use the first empty entry in this queue's command buffer array * to contain the Tx command and MAC header concatenated together * (payload data will be in another buffer). * Size of this varies, due to varying MAC header length. * If end is not dword aligned, we'll have 2 extra bytes at the end * of the MAC header (device reads on dword boundaries). * We'll tell device about this padding later. */ len = sizeof(struct iwl3945_tx_cmd) + sizeof(struct iwl_cmd_header) + hdr_len; len_org = len; len = (len + 3) & ~3; if (len_org != len) len_org = 1; else len_org = 0; /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr, len, PCI_DMA_TODEVICE); /* we do not map meta data ... so we can safely access address to * provide to unmap command*/ pci_unmap_addr_set(out_meta, mapping, txcmd_phys); pci_unmap_len_set(out_meta, len, len); /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, txcmd_phys, len, 1, 0); /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ len = skb->len - hdr_len; if (len) { phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len, len, PCI_DMA_TODEVICE); priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, phys_addr, len, 0, U32_PAD(len)); } /* Tell device the write index *just past* this latest filled TFD */ q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); rc = iwl_txq_update_write_ptr(priv, txq); spin_unlock_irqrestore(&priv->lock, flags); if (rc) return rc; if ((iwl_queue_space(q) < q->high_mark) && priv->mac80211_registered) { if (wait_write_ptr) { spin_lock_irqsave(&priv->lock, flags); txq->need_update = 1; iwl_txq_update_write_ptr(priv, txq); spin_unlock_irqrestore(&priv->lock, flags); } iwl_stop_queue(priv, skb_get_queue_mapping(skb)); } return 0; drop_unlock: spin_unlock_irqrestore(&priv->lock, flags); drop: return -1; } #ifdef CONFIG_IWL3945_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 iwl3945_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 iwl3945_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 iwl3945_get_measurement(struct iwl_priv *priv, struct ieee80211_measurement_params *params, u8 type) { struct iwl_spectrum_cmd spectrum; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SPECTRUM_MEASUREMENT_CMD, .data = (void *)&spectrum, .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 = iwl3945_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 = iwl3945_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.reply_skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "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(priv, "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.reply_skb); return rc; } #endif static void iwl3945_rx_reply_alive(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; IWL_DEBUG_INFO(priv, "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(priv, "Initialization Alive received.\n"); memcpy(&priv->card_alive_init, &pkt->u.alive_frame, sizeof(struct iwl_alive_resp)); pwork = &priv->init_alive_start; } else { IWL_DEBUG_INFO(priv, "Runtime Alive received.\n"); memcpy(&priv->card_alive, &pkt->u.alive_frame, sizeof(struct iwl_alive_resp)); pwork = &priv->alive_start; iwl3945_disable_events(priv); } /* 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_WARN(priv, "uCode did not respond OK.\n"); } static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; #endif IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status); return; } static void iwl3945_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_ERR(priv, "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); iwl3945_send_beacon_cmd(priv); } static void iwl3945_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status); u8 rate = beacon->beacon_notify_hdr.rate; IWL_DEBUG_RX(priv, "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 == NL80211_IFTYPE_AP) && (!test_bit(STATUS_EXIT_PENDING, &priv->status))) queue_work(priv->workqueue, &priv->beacon_update); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void iwl3945_rx_card_state_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = priv->status; IWL_WARN(priv, "Card state received: HW:%s SW:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On"); iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (flags & HW_CARD_DISABLED) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); iwl_scan_cancel(priv); if ((test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))) wiphy_rfkill_set_hw_state(priv->hw->wiphy, test_bit(STATUS_RF_KILL_HW, &priv->status)); else wake_up_interruptible(&priv->wait_command_queue); } /** * iwl3945_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 iwl3945_setup_rx_handlers(struct iwl_priv *priv) { priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive; priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta; priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error; priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa; priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif; priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_rx_pm_debug_statistics_notif; priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_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] = iwl3945_hw_rx_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics; iwl_setup_spectrum_handlers(priv); iwl_setup_rx_scan_handlers(priv); priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif; /* Set up hardware specific Rx handlers */ iwl3945_hw_rx_handler_setup(priv); } /************************** RX-FUNCTIONS ****************************/ /* * Rx theory of operation * * The host allocates 32 DMA target addresses and passes the host address * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is * 0 to 31 * * Rx Queue Indexes * The host/firmware share two index registers for managing the Rx buffers. * * The READ index maps to the first position that the firmware may be writing * to -- the driver can read up to (but not including) this position and get * good data. * The READ index is managed by the firmware once the card is enabled. * * The WRITE index maps to the last position the driver has read from -- the * position preceding WRITE is the last slot the firmware can place a packet. * * The queue is empty (no good data) if WRITE = READ - 1, and is full if * WRITE = READ. * * During initialization, the host sets up the READ queue position to the first * INDEX position, and WRITE to the last (READ - 1 wrapped) * * When the firmware places a packet in a buffer, it will advance the READ index * and fire the RX interrupt. The driver can then query the READ index and * process as many packets as possible, moving the WRITE index forward as it * resets the Rx queue buffers with new memory. * * The management in the driver is as follows: * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled * to replenish the iwl->rxq->rx_free. * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the * iwl->rxq is replenished and the READ INDEX is updated (updating the * 'processed' and 'read' driver indexes as well) * + A received packet is processed and handed to the kernel network stack, * detached from the iwl->rxq. The driver 'processed' index is updated. * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there * were enough free buffers and RX_STALLED is set it is cleared. * * * Driver sequence: * * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls * iwl3945_rx_queue_restock * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx * queue, updates firmware pointers, and updates * the WRITE index. If insufficient rx_free buffers * are available, schedules iwl3945_rx_replenish * * -- enable interrupts -- * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the * READ INDEX, detaching the SKB from the pool. * Moves the packet buffer from queue to rx_used. * Calls iwl3945_rx_queue_restock to refill any empty * slots. * ... * */ /** * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr */ static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv, dma_addr_t dma_addr) { return cpu_to_le32((u32)dma_addr); } /** * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool * * If there are slots in the RX queue that need to be restocked, * and we have free pre-allocated buffers, fill the ranks as much * as we can, pulling from rx_free. * * This moves the 'write' index forward to catch up with 'processed', and * also updates the memory address in the firmware to reference the new * target buffer. */ static int iwl3945_rx_queue_restock(struct iwl_priv *priv) { struct iwl_rx_queue *rxq = &priv->rxq; struct list_head *element; struct iwl_rx_mem_buffer *rxb; unsigned long flags; int write, rc; spin_lock_irqsave(&rxq->lock, flags); write = rxq->write & ~0x7; while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { /* Get next free Rx buffer, remove from free list */ element = rxq->rx_free.next; rxb = list_entry(element, struct iwl_rx_mem_buffer, list); list_del(element); /* Point to Rx buffer via next RBD in circular buffer */ rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr); rxq->queue[rxq->write] = rxb; rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; rxq->free_count--; } spin_unlock_irqrestore(&rxq->lock, flags); /* If the pre-allocated buffer pool is dropping low, schedule to * refill it */ if (rxq->free_count <= RX_LOW_WATERMARK) queue_work(priv->workqueue, &priv->rx_replenish); /* If we've added more space for the firmware to place data, tell it. * Increment device's write pointer in multiples of 8. */ if ((rxq->write_actual != (rxq->write & ~0x7)) || (abs(rxq->write - rxq->read) > 7)) { spin_lock_irqsave(&rxq->lock, flags); rxq->need_update = 1; spin_unlock_irqrestore(&rxq->lock, flags); rc = iwl_rx_queue_update_write_ptr(priv, rxq); if (rc) return rc; } return 0; } /** * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free * * When moving to rx_free an SKB is allocated for the slot. * * Also restock the Rx queue via iwl3945_rx_queue_restock. * This is called as a scheduled work item (except for during initialization) */ static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority) { struct iwl_rx_queue *rxq = &priv->rxq; struct list_head *element; struct iwl_rx_mem_buffer *rxb; struct sk_buff *skb; unsigned long flags; while (1) { spin_lock_irqsave(&rxq->lock, flags); if (list_empty(&rxq->rx_used)) { spin_unlock_irqrestore(&rxq->lock, flags); return; } spin_unlock_irqrestore(&rxq->lock, flags); if (rxq->free_count > RX_LOW_WATERMARK) priority |= __GFP_NOWARN; /* Alloc a new receive buffer */ skb = alloc_skb(priv->hw_params.rx_buf_size, priority); if (!skb) { if (net_ratelimit()) IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n"); if ((rxq->free_count <= RX_LOW_WATERMARK) && net_ratelimit()) IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n", priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", rxq->free_count); /* We don't reschedule replenish work here -- we will * call the restock method and if it still needs * more buffers it will schedule replenish */ break; } spin_lock_irqsave(&rxq->lock, flags); if (list_empty(&rxq->rx_used)) { spin_unlock_irqrestore(&rxq->lock, flags); dev_kfree_skb_any(skb); return; } element = rxq->rx_used.next; rxb = list_entry(element, struct iwl_rx_mem_buffer, list); list_del(element); spin_unlock_irqrestore(&rxq->lock, flags); rxb->skb = skb; /* If radiotap head is required, reserve some headroom here. * The physical head count is a variable rx_stats->phy_count. * We reserve 4 bytes here. Plus these extra bytes, the * headroom of the physical head should be enough for the * radiotap head that iwl3945 supported. See iwl3945_rt. */ skb_reserve(rxb->skb, 4); /* Get physical address of RB/SKB */ rxb->real_dma_addr = pci_map_single(priv->pci_dev, rxb->skb->data, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); spin_lock_irqsave(&rxq->lock, flags); list_add_tail(&rxb->list, &rxq->rx_free); priv->alloc_rxb_skb++; rxq->free_count++; spin_unlock_irqrestore(&rxq->lock, flags); } } void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) { unsigned long flags; int i; spin_lock_irqsave(&rxq->lock, flags); INIT_LIST_HEAD(&rxq->rx_free); INIT_LIST_HEAD(&rxq->rx_used); /* Fill the rx_used queue with _all_ of the Rx buffers */ for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { /* In the reset function, these buffers may have been allocated * to an SKB, so we need to unmap and free potential storage */ if (rxq->pool[i].skb != NULL) { pci_unmap_single(priv->pci_dev, rxq->pool[i].real_dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); priv->alloc_rxb_skb--; dev_kfree_skb(rxq->pool[i].skb); rxq->pool[i].skb = NULL; } list_add_tail(&rxq->pool[i].list, &rxq->rx_used); } /* Set us so that we have processed and used all buffers, but have * not restocked the Rx queue with fresh buffers */ rxq->read = rxq->write = 0; rxq->free_count = 0; rxq->write_actual = 0; spin_unlock_irqrestore(&rxq->lock, flags); } void iwl3945_rx_replenish(void *data) { struct iwl_priv *priv = data; unsigned long flags; iwl3945_rx_allocate(priv, GFP_KERNEL); spin_lock_irqsave(&priv->lock, flags); iwl3945_rx_queue_restock(priv); spin_unlock_irqrestore(&priv->lock, flags); } static void iwl3945_rx_replenish_now(struct iwl_priv *priv) { iwl3945_rx_allocate(priv, GFP_ATOMIC); iwl3945_rx_queue_restock(priv); } /* Assumes that the skb field of the buffers in 'pool' is kept accurate. * If an SKB has been detached, the POOL needs to have its SKB set to NULL * This free routine walks the list of POOL entries and if SKB is set to * non NULL it is unmapped and freed */ static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) { int i; for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { if (rxq->pool[i].skb != NULL) { pci_unmap_single(priv->pci_dev, rxq->pool[i].real_dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); dev_kfree_skb(rxq->pool[i].skb); } } pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd, rxq->dma_addr); pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status), rxq->rb_stts, rxq->rb_stts_dma); rxq->bd = NULL; rxq->rb_stts = NULL; } /* 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 iwl3945_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 iwl3945_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; } /** * iwl3945_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. */ static void iwl3945_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; int total_empty = 0; /* uCode's read index (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; i = rxq->read; /* calculate total frames need to be restock after handling RX */ total_empty = r - priv->rxq.write_actual; if (total_empty < 0) total_empty += RX_QUEUE_SIZE; if (total_empty > (RX_QUEUE_SIZE / 2)) fill_rx = 1; /* Rx interrupt, but nothing sent from uCode */ if (i == r) IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i); 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_unmap_single(priv->pci_dev, rxb->real_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 != 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 iwl3945_setup_rx_handlers() */ if (priv->rx_handlers[pkt->hdr.cmd]) { IWL_DEBUG_RX(priv, "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); priv->isr_stats.rx_handlers[pkt->hdr.cmd]++; } else { /* No handling needed */ IWL_DEBUG_RX(priv, "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) iwl_tx_cmd_complete(priv, rxb); else IWL_WARN(priv, "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; } 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 won't assert. */ if (fill_rx) { count++; if (count >= 8) { priv->rxq.read = i; iwl3945_rx_replenish_now(priv); count = 0; } } } /* Backtrack one entry */ priv->rxq.read = i; if (fill_rx) iwl3945_rx_replenish_now(priv); else iwl3945_rx_queue_restock(priv); } /* call this function to flush any scheduled tasklet */ static inline void iwl_synchronize_irq(struct iwl_priv *priv) { /* wait to make sure we flush pending tasklet*/ synchronize_irq(priv->pci_dev->irq); tasklet_kill(&priv->irq_tasklet); } static const char *desc_lookup(int i) { switch (i) { case 1: return "FAIL"; case 2: return "BAD_PARAM"; case 3: return "BAD_CHECKSUM"; case 4: return "NMI_INTERRUPT"; case 5: return "SYSASSERT"; case 6: return "FATAL_ERROR"; } return "UNKNOWN"; } #define ERROR_START_OFFSET (1 * sizeof(u32)) #define ERROR_ELEM_SIZE (7 * sizeof(u32)) static void iwl3945_dump_nic_error_log(struct iwl_priv *priv) { u32 i; u32 desc, time, count, base, data1; u32 blink1, blink2, ilink1, ilink2; base = le32_to_cpu(priv->card_alive.error_event_table_ptr); if (!iwl3945_hw_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base); return; } count = iwl_read_targ_mem(priv, base); if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { IWL_ERR(priv, "Start IWL Error Log Dump:\n"); IWL_ERR(priv, "Status: 0x%08lX, count: %d\n", priv->status, count); } IWL_ERR(priv, "Desc Time asrtPC blink2 " "ilink1 nmiPC Line\n"); for (i = ERROR_START_OFFSET; i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET; i += ERROR_ELEM_SIZE) { desc = iwl_read_targ_mem(priv, base + i); time = iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32)); blink1 = iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32)); blink2 = iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32)); ilink1 = iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32)); ilink2 = iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32)); data1 = iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32)); IWL_ERR(priv, "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n", desc_lookup(desc), desc, time, blink1, blink2, ilink1, ilink2, data1); } } #define EVENT_START_OFFSET (6 * sizeof(u32)) /** * iwl3945_print_event_log - Dump error event log to syslog * */ static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx, u32 num_events, u32 mode) { u32 i; u32 base; /* SRAM byte address of event log header */ u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */ u32 ptr; /* SRAM byte address of log data */ u32 ev, time, data; /* event log data */ if (num_events == 0) return; base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (mode == 0) event_size = 2 * sizeof(u32); else event_size = 3 * sizeof(u32); ptr = base + EVENT_START_OFFSET + (start_idx * event_size); /* "time" is actually "data" for mode 0 (no timestamp). * place event id # at far right for easier visual parsing. */ for (i = 0; i < num_events; i++) { ev = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); time = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); if (mode == 0) { /* data, ev */ IWL_ERR(priv, "0x%08x\t%04u\n", time, ev); } else { data = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev); } } } static void iwl3945_dump_nic_event_log(struct iwl_priv *priv) { u32 base; /* SRAM byte address of event log header */ u32 capacity; /* event log capacity in # entries */ u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ u32 num_wraps; /* # times uCode wrapped to top of log */ u32 next_entry; /* index of next entry to be written by uCode */ u32 size; /* # entries that we'll print */ base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (!iwl3945_hw_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base); return; } /* event log header */ capacity = iwl_read_targ_mem(priv, base); mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32))); num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32))); next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32))); size = num_wraps ? capacity : next_entry; /* bail out if nothing in log */ if (size == 0) { IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n"); return; } IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n", size, num_wraps); /* if uCode has wrapped back to top of log, start at the oldest entry, * i.e the next one that uCode would fill. */ if (num_wraps) iwl3945_print_event_log(priv, next_entry, capacity - next_entry, mode); /* (then/else) start at top of log */ iwl3945_print_event_log(priv, 0, next_entry, mode); } static void iwl3945_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 (iwl_get_debug_level(priv) & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR(priv, "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 & CSR39_FH_INT_RX_MASK) inta |= CSR_INT_BIT_FH_RX; if (inta_fh & CSR39_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_ERR(priv, "Hardware error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl_disable_interrupts(priv); priv->isr_stats.hw++; iwl_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; spin_unlock_irqrestore(&priv->lock, flags); return; } #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { IWL_DEBUG_ISR(priv, "Scheduler finished to transmit " "the frame/frames.\n"); priv->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { IWL_DEBUG_ISR(priv, "Alive interrupt\n"); priv->isr_stats.alive++; } } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* Error detected by uCode */ if (inta & CSR_INT_BIT_SW_ERR) { IWL_ERR(priv, "Microcode SW error detected. " "Restarting 0x%X.\n", inta); priv->isr_stats.sw++; priv->isr_stats.sw_err = inta; iwl_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(priv, "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]); priv->isr_stats.wakeup++; 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)) { iwl3945_rx_handle(priv); priv->isr_stats.rx++; handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } if (inta & CSR_INT_BIT_FH_TX) { IWL_DEBUG_ISR(priv, "Tx interrupt\n"); priv->isr_stats.tx++; iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6)); iwl_write_direct32(priv, FH39_TCSR_CREDIT (FH39_SRVC_CHNL), 0x0); handled |= CSR_INT_BIT_FH_TX; } if (inta & ~handled) { IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled); priv->isr_stats.unhandled++; } if (inta & ~priv->inta_mask) { IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", inta & ~priv->inta_mask); IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if disabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl_enable_interrupts(priv); #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & (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(priv, "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 int iwl3945_get_channels_for_scan(struct iwl_priv *priv, enum ieee80211_band band, u8 is_active, u8 n_probes, struct iwl3945_scan_channel *scan_ch) { struct ieee80211_channel *chan; 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; active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); passive_dwell = iwl_get_passive_dwell_time(priv, band); if (passive_dwell <= active_dwell) passive_dwell = active_dwell + 1; for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { chan = priv->scan_request->channels[i]; if (chan->band != band) continue; scan_ch->channel = chan->hw_value; ch_info = iwl_get_channel_info(priv, band, scan_ch->channel); if (!is_channel_valid(ch_info)) { IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", scan_ch->channel); continue; } scan_ch->active_dwell = cpu_to_le16(active_dwell); scan_ch->passive_dwell = cpu_to_le16(passive_dwell); /* If passive , set up for auto-switch * and use long active_dwell time. */ if (!is_active || is_channel_passive(ch_info) || (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) { scan_ch->type = 0; /* passive */ if (IWL_UCODE_API(priv->ucode_ver) == 1) scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1); } else { scan_ch->type = 1; /* active */ } /* Set direct probe bits. These may be used both for active * scan channels (probes gets sent right away), * or for passive channels (probes get se sent only after * hearing clear Rx packet).*/ if (IWL_UCODE_API(priv->ucode_ver) >= 2) { if (n_probes) scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes); } else { /* uCode v1 does not allow setting direct probe bits on * passive channel. */ if ((scan_ch->type & 1) && n_probes) scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes); } /* 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(priv, "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(priv, "total channels to scan %d \n", added); return added; } static void iwl3945_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates) { int i; for (i = 0; i < IWL_RATE_COUNT; i++) { rates[i].bitrate = iwl3945_rates[i].ieee * 5; rates[i].hw_value = i; /* Rate scaling will work on indexes */ rates[i].hw_value_short = i; rates[i].flags = 0; if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) { /* * If CCK != 1M then set short preamble rate flag. */ rates[i].flags |= (iwl3945_rates[i].plcp == 10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void iwl3945_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); } /** * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host, * looking at all data. */ static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len) { u32 val; u32 save_len = len; int rc = 0; u32 errcnt; IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len); iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, IWL39_RTC_INST_LOWER_BOUND); errcnt = 0; for (; len > 0; len -= sizeof(u32), image++) { /* read data comes through single port, auto-incr addr */ /* NOTE: Use the debugless read so we don't flood kernel log * if IWL_DL_IO is set */ val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { IWL_ERR(priv, "uCode INST section is invalid at " "offset 0x%x, is 0x%x, s/b 0x%x\n", save_len - len, val, le32_to_cpu(*image)); rc = -EIO; errcnt++; if (errcnt >= 20) break; } } if (!errcnt) IWL_DEBUG_INFO(priv, "ucode image in INSTRUCTION memory is good\n"); return rc; } /** * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host, * using sample data 100 bytes apart. If these sample points are good, * it's a pretty good bet that everything between them is good, too. */ static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len) { u32 val; int rc = 0; u32 errcnt = 0; u32 i; IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len); for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) { /* read data comes through single port, auto-incr addr */ /* NOTE: Use the debugless read so we don't flood kernel log * if IWL_DL_IO is set */ iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, i + IWL39_RTC_INST_LOWER_BOUND); val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { #if 0 /* Enable this if you want to see details */ IWL_ERR(priv, "uCode INST section is invalid at " "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val, *image); #endif rc = -EIO; errcnt++; if (errcnt >= 3) break; } } return rc; } /** * iwl3945_verify_ucode - determine which instruction image is in SRAM, * and verify its contents */ static int iwl3945_verify_ucode(struct iwl_priv *priv) { __le32 *image; u32 len; int rc = 0; /* Try bootstrap */ image = (__le32 *)priv->ucode_boot.v_addr; len = priv->ucode_boot.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n"); return 0; } /* Try initialize */ image = (__le32 *)priv->ucode_init.v_addr; len = priv->ucode_init.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n"); return 0; } /* Try runtime/protocol */ image = (__le32 *)priv->ucode_code.v_addr; len = priv->ucode_code.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n"); return 0; } IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n"); /* Since nothing seems to match, show first several data entries in * instruction SRAM, so maybe visual inspection will give a clue. * Selection of bootstrap image (vs. other images) is arbitrary. */ image = (__le32 *)priv->ucode_boot.v_addr; len = priv->ucode_boot.len; rc = iwl3945_verify_inst_full(priv, image, len); return rc; } static void iwl3945_nic_start(struct iwl_priv *priv) { /* Remove all resets to allow NIC to operate */ iwl_write32(priv, CSR_RESET, 0); } /** * iwl3945_read_ucode - Read uCode images from disk file. * * Copy into buffers for card to fetch via bus-mastering */ static int iwl3945_read_ucode(struct iwl_priv *priv) { const struct iwl_ucode_header *ucode; int ret = -EINVAL, index; const struct firmware *ucode_raw; /* firmware file name contains uCode/driver compatibility version */ const char *name_pre = priv->cfg->fw_name_pre; const unsigned int api_max = priv->cfg->ucode_api_max; const unsigned int api_min = priv->cfg->ucode_api_min; char buf[25]; u8 *src; size_t len; u32 api_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. */ for (index = api_max; index >= api_min; index--) { sprintf(buf, "%s%u%s", name_pre, index, ".ucode"); ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev); if (ret < 0) { IWL_ERR(priv, "%s firmware file req failed: %d\n", buf, ret); if (ret == -ENOENT) continue; else goto error; } else { if (index < api_max) IWL_ERR(priv, "Loaded firmware %s, " "which is deprecated. " " Please use API v%u instead.\n", buf, api_max); IWL_DEBUG_INFO(priv, "Got firmware '%s' file " "(%zd bytes) from disk\n", buf, ucode_raw->size); break; } } if (ret < 0) goto error; /* Make sure that we got at least our header! */ if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) { IWL_ERR(priv, "File size way too small!\n"); ret = -EINVAL; goto err_release; } /* Data from ucode file: header followed by uCode images */ ucode = (struct iwl_ucode_header *)ucode_raw->data; priv->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IWL_UCODE_API(priv->ucode_ver); inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver); data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver); init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver); init_data_size = priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver); boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver); src = priv->cfg->ops->ucode->get_data(ucode, api_ver); /* api_ver should match the api version forming part of the * firmware filename ... but we don't check for that and only rely * on the API version read from firmware header from here on forward */ if (api_ver < api_min || api_ver > api_max) { IWL_ERR(priv, "Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); priv->ucode_ver = 0; ret = -EINVAL; goto err_release; } if (api_ver != api_max) IWL_ERR(priv, "Firmware has old API version. Expected %u, " "got %u. New firmware can be obtained " "from http://www.intellinuxwireless.org.\n", api_max, api_ver); IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver)); IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n", priv->ucode_ver); IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n", inst_size); IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n", data_size); IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n", init_size); IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n", init_data_size); IWL_DEBUG_INFO(priv, "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 != priv->cfg->ops->ucode->get_header_size(api_ver) + inst_size + data_size + init_size + init_data_size + boot_size) { IWL_DEBUG_INFO(priv, "uCode file size %zd does not match expected size\n", ucode_raw->size); ret = -EINVAL; goto err_release; } /* Verify that uCode images will fit in card's SRAM */ if (inst_size > IWL39_MAX_INST_SIZE) { IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n", inst_size); ret = -EINVAL; goto err_release; } if (data_size > IWL39_MAX_DATA_SIZE) { IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n", data_size); ret = -EINVAL; goto err_release; } if (init_size > IWL39_MAX_INST_SIZE) { IWL_DEBUG_INFO(priv, "uCode init instr len %d too large to fit in\n", init_size); ret = -EINVAL; goto err_release; } if (init_data_size > IWL39_MAX_DATA_SIZE) { IWL_DEBUG_INFO(priv, "uCode init data len %d too large to fit in\n", init_data_size); ret = -EINVAL; goto err_release; } if (boot_size > IWL39_MAX_BSM_SIZE) { IWL_DEBUG_INFO(priv, "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); if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr || !priv->ucode_data_backup.v_addr) goto err_pci_alloc; /* 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) */ len = inst_size; IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %zd\n", len); memcpy(priv->ucode_code.v_addr, src, len); src += len; IWL_DEBUG_INFO(priv, "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 iwl3945_up() */ len = data_size; IWL_DEBUG_INFO(priv, "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); src += len; /* Initialization instructions (3rd block) */ if (init_size) { len = init_size; IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %zd\n", len); memcpy(priv->ucode_init.v_addr, src, len); src += len; } /* Initialization data (4th block) */ if (init_data_size) { len = init_data_size; IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %zd\n", len); memcpy(priv->ucode_init_data.v_addr, src, len); src += len; } /* Bootstrap instructions (5th block) */ len = boot_size; IWL_DEBUG_INFO(priv, "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_ERR(priv, "failed to allocate pci memory\n"); ret = -ENOMEM; iwl3945_dealloc_ucode_pci(priv); err_release: release_firmware(ucode_raw); error: return ret; } /** * iwl3945_set_ucode_ptrs - Set uCode address location * * Tell initialization uCode where to find runtime uCode. * * BSM registers initially contain pointers to initialization uCode. * We need to replace them to load runtime uCode inst and data, * and to save runtime data when powering down. */ static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv) { dma_addr_t pinst; dma_addr_t pdata; /* bits 31:0 for 3945 */ pinst = priv->ucode_code.p_addr; pdata = priv->ucode_data_backup.p_addr; /* Tell bootstrap uCode where to find image to load */ iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst); iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata); iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, priv->ucode_data.len); /* Inst byte count must be last to set up, bit 31 signals uCode * that all new ptr/size info is in place */ iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, priv->ucode_code.len | BSM_DRAM_INST_LOAD); IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n"); return 0; } /** * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received * * Called after REPLY_ALIVE notification received from "initialize" uCode. * * Tell "initialize" uCode to go ahead and load the runtime uCode. */ static void iwl3945_init_alive_start(struct iwl_priv *priv) { /* Check alive response for "valid" sign from uCode */ if (priv->card_alive_init.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(priv, "Initialize Alive failed.\n"); goto restart; } /* Bootstrap uCode has loaded initialize uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "initialize" alive if code weren't properly loaded. */ if (iwl3945_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n"); goto restart; } /* Send pointers to protocol/runtime uCode image ... init code will * load and launch runtime uCode, which will send us another "Alive" * notification. */ IWL_DEBUG_INFO(priv, "Initialization Alive received.\n"); if (iwl3945_set_ucode_ptrs(priv)) { /* Runtime instruction load won't happen; * take it all the way back down so we can try again */ IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n"); goto restart; } return; restart: queue_work(priv->workqueue, &priv->restart); } /** * iwl3945_alive_start - called after REPLY_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by iwl3945_init_alive_start()). */ static void iwl3945_alive_start(struct iwl_priv *priv) { int thermal_spin = 0; u32 rfkill; IWL_DEBUG_INFO(priv, "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(priv, "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 (iwl3945_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n"); goto restart; } iwl_clear_stations_table(priv); rfkill = iwl_read_prph(priv, APMG_RFKILL_REG); IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill); if (rfkill & 0x1) { clear_bit(STATUS_RF_KILL_HW, &priv->status); /* if RFKILL is not on, then wait for thermal * sensor in adapter to kick in */ while (iwl3945_hw_get_temperature(priv) == 0) { thermal_spin++; udelay(10); } if (thermal_spin) IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n", thermal_spin * 10); } else set_bit(STATUS_RF_KILL_HW, &priv->status); /* After the ALIVE response, we can send commands to 3945 uCode */ set_bit(STATUS_ALIVE, &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; iwl_power_update_mode(priv, false); if (iwl_is_associated(priv)) { struct iwl3945_rxon_cmd *active_rxon = (struct iwl3945_rxon_cmd *)(&priv->active_rxon); priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ iwl_connection_init_rx_config(priv, priv->iw_mode); } /* Configure Bluetooth device coexistence support */ iwl_send_bt_config(priv); /* Configure the adapter for unassociated operation */ iwlcore_commit_rxon(priv); iwl3945_reg_txpower_periodic(priv); iwl3945_led_register(priv); IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n"); set_bit(STATUS_READY, &priv->status); wake_up_interruptible(&priv->wait_command_queue); /* reassociate for ADHOC mode */ if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) { struct sk_buff *beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (beacon) iwl_mac_beacon_update(priv->hw, beacon); } if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status)) iwl_set_mode(priv, priv->iw_mode); return; restart: queue_work(priv->workqueue, &priv->restart); } static void iwl3945_cancel_deferred_work(struct iwl_priv *priv); static void __iwl3945_down(struct iwl_priv *priv) { unsigned long flags; int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status); struct ieee80211_conf *conf = NULL; IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n"); conf = ieee80211_get_hw_conf(priv->hw); if (!exit_pending) set_bit(STATUS_EXIT_PENDING, &priv->status); iwl3945_led_unregister(priv); iwl_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); iwl_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 iwl3945_init() then * clear all bits but the RF Kill 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_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill * bit and continue taking the NIC down. */ priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_FW_ERROR, &priv->status) << STATUS_FW_ERROR | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; priv->cfg->ops->lib->apm_ops.reset(priv); 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); iwl3945_hw_txq_ctx_stop(priv); iwl3945_hw_rxq_stop(priv); iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(5); if (exit_pending) priv->cfg->ops->lib->apm_ops.stop(priv); else priv->cfg->ops->lib->apm_ops.reset(priv); exit: memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp)); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; /* clear out any free frames */ iwl3945_clear_free_frames(priv); } static void iwl3945_down(struct iwl_priv *priv) { mutex_lock(&priv->mutex); __iwl3945_down(priv); mutex_unlock(&priv->mutex); iwl3945_cancel_deferred_work(priv); } #define MAX_HW_RESTARTS 5 static int __iwl3945_up(struct iwl_priv *priv) { int rc, i; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); return -EIO; } if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) { IWL_ERR(priv, "ucode not available for device bring up\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); IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n"); return -ENODEV; } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); rc = iwl3945_hw_nic_init(priv); if (rc) { IWL_ERR(priv, "Unable to int nic\n"); return rc; } /* 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); iwl_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++) { iwl_clear_stations_table(priv); /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ priv->cfg->ops->lib->load_ucode(priv); if (rc) { IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n", rc); continue; } /* start card; "initialize" will load runtime ucode */ iwl3945_nic_start(priv); IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n"); return 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); __iwl3945_down(priv); clear_bit(STATUS_EXIT_PENDING, &priv->status); /* tried to restart and config the device for as long as our * patience could withstand */ IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void iwl3945_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); iwl3945_init_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl3945_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); iwl3945_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl3945_rfkill_poll(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rfkill_poll.work); 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); wiphy_rfkill_set_hw_state(priv->hw->wiphy, test_bit(STATUS_RF_KILL_HW, &priv->status)); queue_delayed_work(priv->workqueue, &priv->rfkill_poll, round_jiffies_relative(2 * HZ)); } #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) static void iwl3945_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 iwl3945_scan_cmd), .flags = CMD_SIZE_HUGE, }; int rc = 0; struct iwl3945_scan_cmd *scan; struct ieee80211_conf *conf = NULL; u8 n_probes = 0; enum ieee80211_band band; bool is_active = false; conf = ieee80211_get_hw_conf(priv->hw); mutex_lock(&priv->mutex); cancel_delayed_work(&priv->scan_check); if (!iwl_is_ready(priv)) { IWL_WARN(priv, "request scan called when driver not ready.\n"); goto done; } /* Make sure the scan wasn't canceled 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(priv, "Multiple concurrent scan requests " "Ignoring second request.\n"); rc = -EIO; goto done; } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); goto done; } if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); goto done; } if (iwl_is_rfkill(priv)) { IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); goto done; } if (!test_bit(STATUS_READY, &priv->status)) { IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); goto done; } if (!priv->scan_bands) { IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n"); goto done; } if (!priv->scan) { priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE, GFP_KERNEL); if (!priv->scan) { rc = -ENOMEM; goto done; } } scan = priv->scan; memset(scan, 0, sizeof(struct iwl3945_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(priv, "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; /* * suspend time format: * 0-19: beacon interval in usec (time before exec.) * 20-23: 0 * 24-31: number of beacons (suspend between channels) */ extra = (suspend_time / interval) << 24; scan_suspend_time = 0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024)); scan->suspend_time = cpu_to_le32(scan_suspend_time); IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", scan_suspend_time, interval); } if (priv->scan_request->n_ssids) { int i, p = 0; IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); for (i = 0; i < priv->scan_request->n_ssids; i++) { /* always does wildcard anyway */ if (!priv->scan_request->ssids[i].ssid_len) continue; scan->direct_scan[p].id = WLAN_EID_SSID; scan->direct_scan[p].len = priv->scan_request->ssids[i].ssid_len; memcpy(scan->direct_scan[p].ssid, priv->scan_request->ssids[i].ssid, priv->scan_request->ssids[i].ssid_len); n_probes++; p++; } is_active = true; } else IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n"); /* We don't build a direct scan probe request; the uCode will do * that based on the direct_mask added to each channel entry */ 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; /* flags + rate selection */ if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) { scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; scan->tx_cmd.rate = IWL_RATE_1M_PLCP; scan->good_CRC_th = 0; band = IEEE80211_BAND_2GHZ; } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { scan->tx_cmd.rate = IWL_RATE_6M_PLCP; /* * If active scaning is requested but a certain channel * is marked passive, we can do active scanning if we * detect transmissions. */ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0; band = IEEE80211_BAND_5GHZ; } else { IWL_WARN(priv, "Invalid scan band count\n"); goto done; } scan->tx_cmd.len = cpu_to_le16( iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data, priv->scan_request->ie, priv->scan_request->ie_len, IWL_MAX_SCAN_SIZE - sizeof(*scan))); /* select Rx antennas */ scan->flags |= iwl3945_get_antenna_flags(priv); if (iwl_is_monitor_mode(priv)) scan->filter_flags = RXON_FILTER_PROMISC_MSK; scan->channel_count = iwl3945_get_channels_for_scan(priv, band, is_active, n_probes, (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); if (scan->channel_count == 0) { IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); goto done; } cmd.len += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct iwl3945_scan_channel); cmd.data = scan; scan->len = cpu_to_le16(cmd.len); set_bit(STATUS_SCAN_HW, &priv->status); rc = iwl_send_cmd_sync(priv, &cmd); if (rc) goto done; queue_delayed_work(priv->workqueue, &priv->scan_check, IWL_SCAN_CHECK_WATCHDOG); mutex_unlock(&priv->mutex); return; done: /* can not perform scan make sure we clear scanning * bits from status so next scan request can be performed. * if we dont clear scanning status bit here all next scan * will fail */ clear_bit(STATUS_SCAN_HW, &priv->status); clear_bit(STATUS_SCANNING, &priv->status); /* inform mac80211 scan aborted */ queue_work(priv->workqueue, &priv->scan_completed); mutex_unlock(&priv->mutex); } static void iwl3945_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); __iwl3945_up(priv); mutex_unlock(&priv->mutex); } static void iwl3945_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; if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) { mutex_lock(&priv->mutex); priv->vif = NULL; priv->is_open = 0; mutex_unlock(&priv->mutex); iwl3945_down(priv); ieee80211_restart_hw(priv->hw); } else { iwl3945_down(priv); queue_work(priv->workqueue, &priv->up); } } static void iwl3945_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); iwl3945_rx_replenish(priv); mutex_unlock(&priv->mutex); } #define IWL_DELAY_NEXT_SCAN (HZ*2) void iwl3945_post_associate(struct iwl_priv *priv) { int rc = 0; struct ieee80211_conf *conf = NULL; if (priv->iw_mode == NL80211_IFTYPE_AP) { IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__); return; } IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n", priv->assoc_id, priv->active_rxon.bssid_addr); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!priv->vif || !priv->is_open) return; iwl_scan_cancel_timeout(priv, 200); conf = ieee80211_get_hw_conf(priv->hw); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); iwl_setup_rxon_timing(priv); rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (rc) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); IWL_DEBUG_ASSOC(priv, "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 == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } iwlcore_commit_rxon(priv); switch (priv->iw_mode) { case NL80211_IFTYPE_STATION: iwl3945_rate_scale_init(priv->hw, IWL_AP_ID); break; case NL80211_IFTYPE_ADHOC: priv->assoc_id = 1; iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL); iwl3945_sync_sta(priv, IWL_STA_ID, (priv->band == IEEE80211_BAND_5GHZ) ? IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP, CMD_ASYNC); iwl3945_rate_scale_init(priv->hw, IWL_STA_ID); iwl3945_send_beacon_cmd(priv); break; default: IWL_ERR(priv, "%s Should not be called in %d mode\n", __func__, priv->iw_mode); break; } iwl_activate_qos(priv, 0); /* we have just associated, don't start scan too early */ priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN; } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (2 * HZ) static int iwl3945_mac_start(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; int ret; IWL_DEBUG_MAC80211(priv, "enter\n"); /* we should be verifying the device is ready to be opened */ mutex_lock(&priv->mutex); /* 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 = iwl3945_read_ucode(priv); if (ret) { IWL_ERR(priv, "Could not read microcode: %d\n", ret); mutex_unlock(&priv->mutex); goto out_release_irq; } } ret = __iwl3945_up(priv); mutex_unlock(&priv->mutex); if (ret) goto out_release_irq; IWL_DEBUG_INFO(priv, "Start UP work.\n"); /* 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_ERR(priv, "Wait for START_ALIVE timeout after %dms.\n", jiffies_to_msecs(UCODE_READY_TIMEOUT)); ret = -ETIMEDOUT; goto out_release_irq; } } /* ucode is running and will send rfkill notifications, * no need to poll the killswitch state anymore */ cancel_delayed_work(&priv->rfkill_poll); priv->is_open = 1; IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; out_release_irq: priv->is_open = 0; IWL_DEBUG_MAC80211(priv, "leave - failed\n"); return ret; } static void iwl3945_mac_stop(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); if (!priv->is_open) { IWL_DEBUG_MAC80211(priv, "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); iwl_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); } iwl3945_down(priv); flush_workqueue(priv->workqueue); /* start polling the killswitch state again */ queue_delayed_work(priv->workqueue, &priv->rfkill_poll, round_jiffies_relative(2 * HZ)); IWL_DEBUG_MAC80211(priv, "leave\n"); } static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (iwl3945_tx_skb(priv, skb)) dev_kfree_skb_any(skb); IWL_DEBUG_MAC80211(priv, "leave\n"); return NETDEV_TX_OK; } void iwl3945_config_ap(struct iwl_priv *priv) { int rc = 0; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* The following should be done only at AP bring up */ if (!(iwl_is_associated(priv))) { /* RXON - unassoc (to set timing command) */ priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); /* RXON Timing */ memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); iwl_setup_rxon_timing(priv); rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (rc) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); /* 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 == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL); } iwl3945_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 iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct iwl_priv *priv = hw->priv; const u8 *addr; int ret = 0; u8 sta_id = IWL_INVALID_STATION; u8 static_key; IWL_DEBUG_MAC80211(priv, "enter\n"); if (iwl3945_mod_params.sw_crypto) { IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } addr = sta ? sta->addr : iwl_bcast_addr; static_key = !iwl_is_associated(priv); if (!static_key) { sta_id = iwl_find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n", addr); return -EINVAL; } } mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); switch (cmd) { case SET_KEY: if (static_key) ret = iwl3945_set_static_key(priv, key); else ret = iwl3945_set_dynamic_key(priv, key, sta_id); IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); break; case DISABLE_KEY: if (static_key) ret = iwl3945_remove_static_key(priv); else ret = iwl3945_clear_sta_key_info(priv, sta_id); IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); break; default: ret = -EINVAL; } IWL_DEBUG_MAC80211(priv, "leave\n"); return ret; } /***************************************************************************** * * 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. * * The debug_level being managed using sysfs below is a per device debug * level that is used instead of the global debug level if it (the per * device debug level) is set. */ static ssize_t show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv)); } static ssize_t store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; int ret; ret = strict_strtoul(buf, 0, &val); if (ret) IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf); else { priv->debug_level = val; if (iwl_alloc_traffic_mem(priv)) IWL_ERR(priv, "Not enough memory to generate traffic log\n"); } 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_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv)); } static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL); static ssize_t show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "%d\n", priv->tx_power_user_lmt); } static ssize_t store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); char *p = (char *)buf; u32 val; val = simple_strtoul(p, &p, 10); if (p == buf) IWL_INFO(priv, ": %s is not in decimal form.\n", buf); else iwl3945_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 = dev_get_drvdata(d); 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 = dev_get_drvdata(d); 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 (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n", flags); priv->staging_rxon.flags = cpu_to_le32(flags); iwlcore_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 = dev_get_drvdata(d); 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 = dev_get_drvdata(d); 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 (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = " "0x%04X\n", filter_flags); priv->staging_rxon.filter_flags = cpu_to_le32(filter_flags); iwlcore_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_IWL3945_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 iwl_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(priv, "Invoking measurement of type %d on " "channel %d (for '%s')\n", type, params.channel, buf); iwl3945_get_measurement(priv, ¶ms, type); return count; } static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, show_measurement, store_measurement); #endif /* CONFIG_IWL3945_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 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 iwl3945_notif_statistics); u32 len = 0, ofs = 0; u8 *data = (u8 *)&priv->statistics_39; 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_antenna(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", iwl3945_mod_params.antenna); } static ssize_t store_antenna(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d); int ant; if (count == 0) return 0; if (sscanf(buf, "%1i", &ant) != 1) { IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n"); return count; } if ((ant >= 0) && (ant <= 2)) { IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant); iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant; } else IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant); return count; } static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna); static ssize_t show_status(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); 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); static ssize_t dump_error_log(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); char *p = (char *)buf; if (p[0] == '1') iwl3945_dump_nic_error_log(priv); return strnlen(buf, count); } static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log); static ssize_t dump_event_log(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); char *p = (char *)buf; if (p[0] == '1') iwl3945_dump_nic_event_log(priv); return strnlen(buf, count); } static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log); /***************************************************************************** * * driver setup and tear down * *****************************************************************************/ static void iwl3945_setup_deferred_work(struct iwl_priv *priv) { priv->workqueue = create_singlethread_workqueue(DRV_NAME); init_waitqueue_head(&priv->wait_command_queue); INIT_WORK(&priv->up, iwl3945_bg_up); INIT_WORK(&priv->restart, iwl3945_bg_restart); INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish); INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update); INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start); INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start); INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll); INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan); INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); iwl3945_hw_setup_deferred_work(priv); tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl3945_irq_tasklet, (unsigned long)priv); } static void iwl3945_cancel_deferred_work(struct iwl_priv *priv) { iwl3945_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_work_sync(&priv->beacon_update); } static struct attribute *iwl3945_sysfs_entries[] = { &dev_attr_antenna.attr, &dev_attr_channels.attr, &dev_attr_dump_errors.attr, &dev_attr_dump_events.attr, &dev_attr_flags.attr, &dev_attr_filter_flags.attr, #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT &dev_attr_measurement.attr, #endif &dev_attr_retry_rate.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 NULL }; static struct attribute_group iwl3945_attribute_group = { .name = NULL, /* put in device directory */ .attrs = iwl3945_sysfs_entries, }; static struct ieee80211_ops iwl3945_hw_ops = { .tx = iwl3945_mac_tx, .start = iwl3945_mac_start, .stop = iwl3945_mac_stop, .add_interface = iwl_mac_add_interface, .remove_interface = iwl_mac_remove_interface, .config = iwl_mac_config, .configure_filter = iwl_configure_filter, .set_key = iwl3945_mac_set_key, .get_tx_stats = iwl_mac_get_tx_stats, .conf_tx = iwl_mac_conf_tx, .reset_tsf = iwl_mac_reset_tsf, .bss_info_changed = iwl_bss_info_changed, .hw_scan = iwl_mac_hw_scan }; static int iwl3945_init_drv(struct iwl_priv *priv) { int ret; struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom; priv->retry_rate = 1; priv->ibss_beacon = NULL; spin_lock_init(&priv->lock); spin_lock_init(&priv->sta_lock); spin_lock_init(&priv->hcmd_lock); INIT_LIST_HEAD(&priv->free_frames); mutex_init(&priv->mutex); /* Clear the driver's (not device's) station table */ iwl_clear_stations_table(priv); priv->data_retry_limit = -1; priv->ieee_channels = NULL; priv->ieee_rates = NULL; priv->band = IEEE80211_BAND_2GHZ; priv->iw_mode = NL80211_IFTYPE_STATION; iwl_reset_qos(priv); priv->qos_data.qos_active = 0; priv->qos_data.qos_cap.val = 0; priv->rates_mask = IWL_RATES_MASK; priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER; if (eeprom->version < EEPROM_3945_EEPROM_VERSION) { IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n", eeprom->version); ret = -EINVAL; goto err; } ret = iwl_init_channel_map(priv); if (ret) { IWL_ERR(priv, "initializing regulatory failed: %d\n", ret); goto err; } /* Set up txpower settings in driver for all channels */ if (iwl3945_txpower_set_from_eeprom(priv)) { ret = -EIO; goto err_free_channel_map; } ret = iwlcore_init_geos(priv); if (ret) { IWL_ERR(priv, "initializing geos failed: %d\n", ret); goto err_free_channel_map; } iwl3945_init_hw_rates(priv, priv->ieee_rates); return 0; err_free_channel_map: iwl_free_channel_map(priv); err: return ret; } static int iwl3945_setup_mac(struct iwl_priv *priv) { int ret; struct ieee80211_hw *hw = priv->hw; hw->rate_control_algorithm = "iwl-3945-rs"; hw->sta_data_size = sizeof(struct iwl3945_sta_priv); /* Tell mac80211 our characteristics */ hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM | IEEE80211_HW_SPECTRUM_MGMT | IEEE80211_HW_SUPPORTS_PS | IEEE80211_HW_SUPPORTS_DYNAMIC_PS; hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->custom_regulatory = true; /* Firmware does not support this */ hw->wiphy->disable_beacon_hints = true; hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945; /* we create the 802.11 header and a zero-length SSID element */ hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; if (priv->bands[IEEE80211_BAND_2GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ]; if (priv->bands[IEEE80211_BAND_5GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ]; ret = ieee80211_register_hw(priv->hw); if (ret) { IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); return ret; } priv->mac80211_registered = 1; return 0; } static int iwl3945_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); struct iwl3945_eeprom *eeprom; unsigned long flags; /*********************** * 1. Allocating HW data * ********************/ /* mac80211 allocates memory for this device instance, including * space for this driver's private structure */ hw = iwl_alloc_all(cfg, &iwl3945_hw_ops); if (hw == NULL) { printk(KERN_ERR DRV_NAME "Can not allocate network device\n"); err = -ENOMEM; goto out; } priv = hw->priv; SET_IEEE80211_DEV(hw, &pdev->dev); /* * Disabling hardware scan means that mac80211 will perform scans * "the hard way", rather than using device's scan. */ if (iwl3945_mod_params.disable_hw_scan) { IWL_DEBUG_INFO(priv, "Disabling hw_scan\n"); iwl3945_hw_ops.hw_scan = NULL; } IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n"); priv->cfg = cfg; priv->pci_dev = pdev; priv->inta_mask = CSR_INI_SET_MASK; #ifdef CONFIG_IWLWIFI_DEBUG atomic_set(&priv->restrict_refcnt, 0); #endif if (iwl_alloc_traffic_mem(priv)) IWL_ERR(priv, "Not enough memory to generate traffic log\n"); /*************************** * 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_BIT_MASK(32)); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { IWL_WARN(priv, "No suitable DMA available.\n"); goto out_pci_disable_device; } pci_set_drvdata(pdev, priv); err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; /*********************** * 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(priv, "pci_resource_len = 0x%08llx\n", (unsigned long long) pci_resource_len(pdev, 0)); IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base); /* 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); /* this spin lock will be used in apm_ops.init and EEPROM access * we should init now */ spin_lock_init(&priv->reg_lock); /* amp init */ err = priv->cfg->ops->lib->apm_ops.init(priv); if (err < 0) { IWL_DEBUG_INFO(priv, "Failed to init the card\n"); goto out_iounmap; } /*********************** * 4. Read EEPROM * ********************/ /* Read the EEPROM */ err = iwl_eeprom_init(priv); if (err) { IWL_ERR(priv, "Unable to init EEPROM\n"); goto out_iounmap; } /* MAC Address location in EEPROM same for 3945/4965 */ eeprom = (struct iwl3945_eeprom *)priv->eeprom; memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN); IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr); SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr); /*********************** * 5. Setup HW Constants * ********************/ /* Device-specific setup */ if (iwl3945_hw_set_hw_params(priv)) { IWL_ERR(priv, "failed to set hw settings\n"); goto out_eeprom_free; } /*********************** * 6. Setup priv * ********************/ err = iwl3945_init_drv(priv); if (err) { IWL_ERR(priv, "initializing driver failed\n"); goto out_unset_hw_params; } IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n", priv->cfg->name); /*********************** * 7. Setup Services * ********************/ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); pci_enable_msi(priv->pci_dev); err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr, IRQF_SHARED, DRV_NAME, priv); if (err) { IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group); if (err) { IWL_ERR(priv, "failed to create sysfs device attributes\n"); goto out_release_irq; } iwl_set_rxon_channel(priv, &priv->bands[IEEE80211_BAND_2GHZ].channels[5]); iwl3945_setup_deferred_work(priv); iwl3945_setup_rx_handlers(priv); /********************************* * 8. Setup and Register mac80211 * *******************************/ iwl_enable_interrupts(priv); err = iwl3945_setup_mac(priv); if (err) goto out_remove_sysfs; err = iwl_dbgfs_register(priv, DRV_NAME); if (err) IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err); /* Start monitoring the killswitch */ queue_delayed_work(priv->workqueue, &priv->rfkill_poll, 2 * HZ); return 0; out_remove_sysfs: destroy_workqueue(priv->workqueue); priv->workqueue = NULL; sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group); out_release_irq: free_irq(priv->pci_dev->irq, priv); out_disable_msi: pci_disable_msi(priv->pci_dev); iwlcore_free_geos(priv); iwl_free_channel_map(priv); out_unset_hw_params: iwl3945_unset_hw_params(priv); out_eeprom_free: iwl_eeprom_free(priv); out_iounmap: pci_iounmap(pdev, priv->hw_base); out_pci_release_regions: pci_release_regions(pdev); out_pci_disable_device: pci_set_drvdata(pdev, NULL); pci_disable_device(pdev); out_ieee80211_free_hw: ieee80211_free_hw(priv->hw); iwl_free_traffic_mem(priv); out: return err; } static void __devexit iwl3945_pci_remove(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); unsigned long flags; if (!priv) return; IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n"); iwl_dbgfs_unregister(priv); set_bit(STATUS_EXIT_PENDING, &priv->status); if (priv->mac80211_registered) { ieee80211_unregister_hw(priv->hw); priv->mac80211_registered = 0; } else { iwl3945_down(priv); } /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group); cancel_delayed_work_sync(&priv->rfkill_poll); iwl3945_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwl3945_rx_queue_free(priv, &priv->rxq); iwl3945_hw_txq_ctx_free(priv); iwl3945_unset_hw_params(priv); iwl_clear_stations_table(priv); /*netif_stop_queue(dev); */ flush_workqueue(priv->workqueue); /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes * priv->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(priv->workqueue); priv->workqueue = NULL; iwl_free_traffic_mem(priv); free_irq(pdev->irq, priv); pci_disable_msi(pdev); pci_iounmap(pdev, priv->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); iwl_free_channel_map(priv); iwlcore_free_geos(priv); kfree(priv->scan); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); ieee80211_free_hw(priv->hw); } /***************************************************************************** * * driver and module entry point * *****************************************************************************/ static struct pci_driver iwl3945_driver = { .name = DRV_NAME, .id_table = iwl3945_hw_card_ids, .probe = iwl3945_pci_probe, .remove = __devexit_p(iwl3945_pci_remove), #ifdef CONFIG_PM .suspend = iwl_pci_suspend, .resume = iwl_pci_resume, #endif }; static int __init iwl3945_init(void) { int ret; printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); ret = iwl3945_rate_control_register(); if (ret) { printk(KERN_ERR DRV_NAME "Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&iwl3945_driver); if (ret) { printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: iwl3945_rate_control_unregister(); return ret; } static void __exit iwl3945_exit(void) { pci_unregister_driver(&iwl3945_driver); iwl3945_rate_control_unregister(); } MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX)); module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444); MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])"); module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444); MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])\n"); #ifdef CONFIG_IWLWIFI_DEBUG module_param_named(debug, iwl_debug_level, uint, 0644); MODULE_PARM_DESC(debug, "debug output mask"); #endif module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444); MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)"); module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444); MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error"); module_exit(iwl3945_exit); module_init(iwl3945_init);