/****************************************************************************** * * Copyright(c) 2003 - 2011 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 * *****************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRV_NAME "iwl3945" #include "commands.h" #include "common.h" #include "3945.h" #include "iwl-spectrum.h" /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION \ "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux" #ifdef CONFIG_IWLEGACY_DEBUG #define VD "d" #else #define VD #endif /* * add "s" to indicate spectrum measurement included. * we add it here to be consistent with previous releases in which * this was configurable. */ #define DRV_VERSION IWLWIFI_VERSION VD "s" #define DRV_COPYRIGHT "Copyright(c) 2003-2011 Intel Corporation" #define DRV_AUTHOR "" MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); /* module parameters */ struct il_mod_params il3945_mod_params = { .sw_crypto = 1, .restart_fw = 1, .disable_hw_scan = 1, /* the rest are 0 by default */ }; /** * il3945_get_antenna_flags - Get antenna flags for RXON command * @il: eeprom and antenna fields are used to determine antenna flags * * il->eeprom39 is used to determine if antenna AUX/MAIN are reversed * il3945_mod_params.antenna specifies the antenna diversity mode: * * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself * IL_ANTENNA_MAIN - Force MAIN antenna * IL_ANTENNA_AUX - Force AUX antenna */ __le32 il3945_get_antenna_flags(const struct il_priv *il) { struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom; switch (il3945_mod_params.antenna) { case IL_ANTENNA_DIVERSITY: return 0; case IL_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 IL_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 */ IL_ERR("Bad antenna selector value (0x%x)\n", il3945_mod_params.antenna); return 0; /* "diversity" is default if error */ } static int il3945_set_ccmp_dynamic_key_info(struct il_priv *il, 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 == il->hw_params.bcast_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(&il->sta_lock, flags); il->stations[sta_id].keyinfo.cipher = keyconf->cipher; il->stations[sta_id].keyinfo.keylen = keyconf->keylen; memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen); if ((il->stations[sta_id].sta.key. key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC) il->stations[sta_id].sta.key.key_offset = il_get_free_ucode_key_idx(il); /* else, we are overriding an existing key => no need to allocated room * in uCode. */ WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET, "no space for a new key"); il->stations[sta_id].sta.key.key_flags = key_flags; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; D_INFO("hwcrypto: modify ucode station key info\n"); ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC); spin_unlock_irqrestore(&il->sta_lock, flags); return ret; } static int il3945_set_tkip_dynamic_key_info(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { return -EOPNOTSUPP; } static int il3945_set_wep_dynamic_key_info(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { return -EOPNOTSUPP; } static int il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id) { unsigned long flags; struct il_addsta_cmd sta_cmd; spin_lock_irqsave(&il->sta_lock, flags); memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key)); memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo)); il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC; il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd)); spin_unlock_irqrestore(&il->sta_lock, flags); D_INFO("hwcrypto: clear ucode station key info\n"); return il_send_add_sta(il, &sta_cmd, CMD_SYNC); } static int il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf, u8 sta_id) { int ret = 0; keyconf->hw_key_idx = HW_KEY_DYNAMIC; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id); break; case WLAN_CIPHER_SUITE_TKIP: ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id); break; case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id); break; default: IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher); ret = -EINVAL; } D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n", keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret); return ret; } static int il3945_remove_static_key(struct il_priv *il) { int ret = -EOPNOTSUPP; return ret; } static int il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key) { if (key->cipher == WLAN_CIPHER_SUITE_WEP40 || key->cipher == WLAN_CIPHER_SUITE_WEP104) return -EOPNOTSUPP; IL_ERR("Static key invalid: cipher %x\n", key->cipher); return -EINVAL; } static void il3945_clear_free_frames(struct il_priv *il) { struct list_head *element; D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count); while (!list_empty(&il->free_frames)) { element = il->free_frames.next; list_del(element); kfree(list_entry(element, struct il3945_frame, list)); il->frames_count--; } if (il->frames_count) { IL_WARN("%d frames still in use. Did we lose one?\n", il->frames_count); il->frames_count = 0; } } static struct il3945_frame * il3945_get_free_frame(struct il_priv *il) { struct il3945_frame *frame; struct list_head *element; if (list_empty(&il->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IL_ERR("Could not allocate frame!\n"); return NULL; } il->frames_count++; return frame; } element = il->free_frames.next; list_del(element); return list_entry(element, struct il3945_frame, list); } static void il3945_free_frame(struct il_priv *il, struct il3945_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &il->free_frames); } unsigned int il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr, int left) { if (!il_is_associated(il) || !il->beacon_skb) return 0; if (il->beacon_skb->len > left) return 0; memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len); return il->beacon_skb->len; } static int il3945_send_beacon_cmd(struct il_priv *il) { struct il3945_frame *frame; unsigned int frame_size; int rc; u8 rate; frame = il3945_get_free_frame(il); if (!frame) { IL_ERR("Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } rate = il_get_lowest_plcp(il); frame_size = il3945_hw_get_beacon_cmd(il, frame, rate); rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]); il3945_free_frame(il, frame); return rc; } static void il3945_unset_hw_params(struct il_priv *il) { if (il->_3945.shared_virt) dma_free_coherent(&il->pci_dev->dev, sizeof(struct il3945_shared), il->_3945.shared_virt, il->_3945.shared_phys); } static void il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info, struct il_device_cmd *cmd, struct sk_buff *skb_frag, int sta_id) { struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload; struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo; tx_cmd->sec_ctl = 0; switch (keyinfo->cipher) { case WLAN_CIPHER_SUITE_CCMP: tx_cmd->sec_ctl = TX_CMD_SEC_CCM; memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen); D_TX("tx_cmd with AES hwcrypto\n"); break; case WLAN_CIPHER_SUITE_TKIP: break; case WLAN_CIPHER_SUITE_WEP104: tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; /* fall through */ case WLAN_CIPHER_SUITE_WEP40: tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | (info->control.hw_key-> hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT; memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen); D_TX("Configuring packet for WEP encryption " "with key %d\n", info->control.hw_key->hw_key_idx); break; default: IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher); break; } } /* * handle build C_TX command notification. */ static void il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd, struct ieee80211_tx_info *info, struct ieee80211_hdr *hdr, u8 std_id) { struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload; __le32 tx_flags = tx_cmd->tx_flags; __le16 fc = hdr->frame_control; tx_cmd->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_cmd->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_cmd->tid_tspec = qc[0] & 0xf; tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; } else { tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } il_tx_cmd_protection(il, info, fc, &tx_flags); 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_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); else tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); } else { tx_cmd->timeout.pm_frame_timeout = 0; } tx_cmd->driver_txop = 0; tx_cmd->tx_flags = tx_flags; tx_cmd->next_frame_len = 0; } /* * start C_TX command process */ static int il3945_tx_skb(struct il_priv *il, struct ieee80211_sta *sta, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct il3945_tx_cmd *tx_cmd; struct il_tx_queue *txq = NULL; struct il_queue *q = NULL; struct il_device_cmd *out_cmd; struct il_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, hdr_len; u16 firstlen, secondlen; u8 sta_id; u8 tid = 0; __le16 fc; u8 wait_write_ptr = 0; unsigned long flags; spin_lock_irqsave(&il->lock, flags); if (il_is_rfkill(il)) { D_DROP("Dropping - RF KILL\n"); goto drop_unlock; } if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) == IL_INVALID_RATE) { IL_ERR("ERROR: No TX rate available.\n"); goto drop_unlock; } fc = hdr->frame_control; #ifdef CONFIG_IWLEGACY_DEBUG if (ieee80211_is_auth(fc)) D_TX("Sending AUTH frame\n"); else if (ieee80211_is_assoc_req(fc)) D_TX("Sending ASSOC frame\n"); else if (ieee80211_is_reassoc_req(fc)) D_TX("Sending REASSOC frame\n"); #endif spin_unlock_irqrestore(&il->lock, flags); hdr_len = ieee80211_hdrlen(fc); /* Find idx into station table for destination station */ sta_id = il_sta_id_or_broadcast(il, sta); if (sta_id == IL_INVALID_STATION) { D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); goto drop; } D_RATE("station Id %d\n", sta_id); if (ieee80211_is_data_qos(fc)) { u8 *qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; if (unlikely(tid >= MAX_TID_COUNT)) goto drop; } /* Descriptor for chosen Tx queue */ txq = &il->txq[txq_id]; q = &txq->q; if ((il_queue_space(q) < q->high_mark)) goto drop; spin_lock_irqsave(&il->lock, flags); idx = il_get_cmd_idx(q, q->write_ptr, 0); txq->skbs[q->write_ptr] = skb; /* Init first empty entry in queue's array of Tx/cmd buffers */ out_cmd = txq->cmd[idx]; out_meta = &txq->meta[idx]; tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload; memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); memset(tx_cmd, 0, sizeof(*tx_cmd)); /* * Set up the Tx-command (not MAC!) header. * Store the chosen Tx queue and TFD idx 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 = C_TX; out_cmd->hdr.sequence = cpu_to_le16((u16) (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr))); /* Copy MAC header from skb into command buffer */ memcpy(tx_cmd->hdr, hdr, hdr_len); if (info->control.hw_key) il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id); /* TODO need this for burst mode later on */ il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id); il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id); /* Total # bytes to be transmitted */ tx_cmd->len = cpu_to_le16((u16) skb->len); tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; /* * 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 il3945_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; firstlen = (len + 3) & ~3; /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ txcmd_phys = pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen, PCI_DMA_TODEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys))) goto drop_unlock; /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ secondlen = skb->len - hdr_len; if (secondlen > 0) { phys_addr = pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, PCI_DMA_TODEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) goto drop_unlock; } /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); dma_unmap_addr_set(out_meta, mapping, txcmd_phys); dma_unmap_len_set(out_meta, len, firstlen); if (secondlen > 0) il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0, U32_PAD(secondlen)); if (!ieee80211_has_morefrags(hdr->frame_control)) { txq->need_update = 1; } else { wait_write_ptr = 1; txq->need_update = 0; } il_update_stats(il, true, fc, skb->len); D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence)); D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd)); il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, ieee80211_hdrlen(fc)); /* Tell device the write idx *just past* this latest filled TFD */ q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); il_txq_update_write_ptr(il, txq); spin_unlock_irqrestore(&il->lock, flags); if (il_queue_space(q) < q->high_mark && il->mac80211_registered) { if (wait_write_ptr) { spin_lock_irqsave(&il->lock, flags); txq->need_update = 1; il_txq_update_write_ptr(il, txq); spin_unlock_irqrestore(&il->lock, flags); } il_stop_queue(il, txq); } return 0; drop_unlock: spin_unlock_irqrestore(&il->lock, flags); drop: return -1; } static int il3945_get_measurement(struct il_priv *il, struct ieee80211_measurement_params *params, u8 type) { struct il_spectrum_cmd spectrum; struct il_rx_pkt *pkt; struct il_host_cmd cmd = { .id = C_SPECTRUM_MEASUREMENT, .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 (il_is_associated(il)) add_time = il_usecs_to_beacons(il, le64_to_cpu(params->start_time) - il->_3945.last_tsf, le16_to_cpu(il->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 (il_is_associated(il)) spectrum.start_time = il_add_beacon_time(il, il->_3945.last_beacon_time, add_time, le16_to_cpu(il->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 (il->active.flags & RXON_FLG_BAND_24G_MSK) spectrum.flags |= RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; rc = il_send_cmd_sync(il, &cmd); if (rc) return rc; pkt = (struct il_rx_pkt *)cmd.reply_page; if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { IL_ERR("Bad return from N_RX_ON_ASSOC command\n"); rc = -EIO; } spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status); switch (spectrum_resp_status) { case 0: /* Command will be handled */ if (pkt->u.spectrum.id != 0xff) { D_INFO("Replaced existing measurement: %d\n", pkt->u.spectrum.id); il->measurement_status &= ~MEASUREMENT_READY; } il->measurement_status |= MEASUREMENT_ACTIVE; rc = 0; break; case 1: /* Command will not be handled */ rc = -EAGAIN; break; } il_free_pages(il, cmd.reply_page); return rc; } static void il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", palive->is_valid, palive->ver_type, palive->ver_subtype); if (palive->ver_subtype == INITIALIZE_SUBTYPE) { D_INFO("Initialization Alive received.\n"); memcpy(&il->card_alive_init, &pkt->u.alive_frame, sizeof(struct il_alive_resp)); pwork = &il->init_alive_start; } else { D_INFO("Runtime Alive received.\n"); memcpy(&il->card_alive, &pkt->u.alive_frame, sizeof(struct il_alive_resp)); pwork = &il->alive_start; il3945_disable_events(il); } /* 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(il->workqueue, pwork, msecs_to_jiffies(5)); else IL_WARN("uCode did not respond OK.\n"); } static void il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb) { #ifdef CONFIG_IWLEGACY_DEBUG struct il_rx_pkt *pkt = rxb_addr(rxb); #endif D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status); } static void il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status); #ifdef CONFIG_IWLEGACY_DEBUG u8 rate = beacon->beacon_notify_hdr.rate; D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n", le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le32_to_cpu(beacon->ibss_mgr_status), le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); #endif il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb) { struct il_rx_pkt *pkt = rxb_addr(rxb); u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = il->status; IL_WARN("Card state received: HW:%s SW:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On"); _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (flags & HW_CARD_DISABLED) set_bit(S_RFKILL, &il->status); else clear_bit(S_RFKILL, &il->status); il_scan_cancel(il); if ((test_bit(S_RFKILL, &status) != test_bit(S_RFKILL, &il->status))) wiphy_rfkill_set_hw_state(il->hw->wiphy, test_bit(S_RFKILL, &il->status)); else wake_up(&il->wait_command_queue); } /** * il3945_setup_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 il3945_setup_handlers(struct il_priv *il) { il->handlers[N_ALIVE] = il3945_hdl_alive; il->handlers[C_ADD_STA] = il3945_hdl_add_sta; il->handlers[N_ERROR] = il_hdl_error; il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa; il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement; il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep; il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats; il->handlers[N_BEACON] = il3945_hdl_beacon; /* * The same handler is used for both the REPLY to a discrete * stats request from the host as well as for the periodic * stats notifications (after received beacons) from the uCode. */ il->handlers[C_STATS] = il3945_hdl_c_stats; il->handlers[N_STATS] = il3945_hdl_stats; il_setup_rx_scan_handlers(il); il->handlers[N_CARD_STATE] = il3945_hdl_card_state; /* Set up hardware specific Rx handlers */ il3945_hw_handler_setup(il); } /************************** RX-FUNCTIONS ****************************/ /* * Rx theory of operation * * The host allocates 32 DMA target addresses and passes the host address * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is * 0 to 31 * * Rx Queue Indexes * The host/firmware share two idx registers for managing the Rx buffers. * * The READ idx 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 idx is managed by the firmware once the card is enabled. * * The WRITE idx 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 * IDX position, and WRITE to the last (READ - 1 wrapped) * * When the firmware places a packet in a buffer, it will advance the READ idx * and fire the RX interrupt. The driver can then query the READ idx and * process as many packets as possible, moving the WRITE idx 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 il3945_rx_replenish (scheduled) if 'processed' != 'read' then the * iwl->rxq is replenished and the READ IDX is updated (updating the * 'processed' and 'read' driver idxes as well) * + A received packet is processed and handed to the kernel network stack, * detached from the iwl->rxq. The driver 'processed' idx 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 * IDX 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: * * il3945_rx_replenish() Replenishes rx_free list from rx_used, and calls * il3945_rx_queue_restock * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx * queue, updates firmware pointers, and updates * the WRITE idx. If insufficient rx_free buffers * are available, schedules il3945_rx_replenish * * -- enable interrupts -- * ISR - il3945_rx() Detach il_rx_bufs from pool up to the * READ IDX, detaching the SKB from the pool. * Moves the packet buffer from queue to rx_used. * Calls il3945_rx_queue_restock to refill any empty * slots. * ... * */ /** * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr */ static inline __le32 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr) { return cpu_to_le32((u32) dma_addr); } /** * il3945_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' idx forward to catch up with 'processed', and * also updates the memory address in the firmware to reference the new * target buffer. */ static void il3945_rx_queue_restock(struct il_priv *il) { struct il_rx_queue *rxq = &il->rxq; struct list_head *element; struct il_rx_buf *rxb; unsigned long flags; spin_lock_irqsave(&rxq->lock, flags); while (il_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 il_rx_buf, list); list_del(element); /* Point to Rx buffer via next RBD in circular buffer */ rxq->bd[rxq->write] = il3945_dma_addr2rbd_ptr(il, rxb->page_dma); 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(il->workqueue, &il->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); il_rx_queue_update_write_ptr(il, rxq); } } /** * il3945_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 il3945_rx_queue_restock. * This is called as a scheduled work item (except for during initialization) */ static void il3945_rx_allocate(struct il_priv *il, gfp_t priority) { struct il_rx_queue *rxq = &il->rxq; struct list_head *element; struct il_rx_buf *rxb; struct page *page; dma_addr_t page_dma; unsigned long flags; gfp_t gfp_mask = priority; 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) gfp_mask |= __GFP_NOWARN; if (il->hw_params.rx_page_order > 0) gfp_mask |= __GFP_COMP; /* Alloc a new receive buffer */ page = alloc_pages(gfp_mask, il->hw_params.rx_page_order); if (!page) { if (net_ratelimit()) D_INFO("Failed to allocate SKB buffer.\n"); if (rxq->free_count <= RX_LOW_WATERMARK && net_ratelimit()) IL_ERR("Failed to allocate SKB buffer with %0x." "Only %u free buffers remaining.\n", priority, 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; } /* Get physical address of RB/SKB */ page_dma = pci_map_page(il->pci_dev, page, 0, PAGE_SIZE << il->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) { __free_pages(page, il->hw_params.rx_page_order); break; } spin_lock_irqsave(&rxq->lock, flags); if (list_empty(&rxq->rx_used)) { spin_unlock_irqrestore(&rxq->lock, flags); pci_unmap_page(il->pci_dev, page_dma, PAGE_SIZE << il->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); __free_pages(page, il->hw_params.rx_page_order); return; } element = rxq->rx_used.next; rxb = list_entry(element, struct il_rx_buf, list); list_del(element); rxb->page = page; rxb->page_dma = page_dma; list_add_tail(&rxb->list, &rxq->rx_free); rxq->free_count++; il->alloc_rxb_page++; spin_unlock_irqrestore(&rxq->lock, flags); } } void il3945_rx_queue_reset(struct il_priv *il, struct il_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].page != NULL) { pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, PAGE_SIZE << il->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); __il_free_pages(il, rxq->pool[i].page); rxq->pool[i].page = 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->write_actual = 0; rxq->free_count = 0; spin_unlock_irqrestore(&rxq->lock, flags); } void il3945_rx_replenish(void *data) { struct il_priv *il = data; unsigned long flags; il3945_rx_allocate(il, GFP_KERNEL); spin_lock_irqsave(&il->lock, flags); il3945_rx_queue_restock(il); spin_unlock_irqrestore(&il->lock, flags); } static void il3945_rx_replenish_now(struct il_priv *il) { il3945_rx_allocate(il, GFP_ATOMIC); il3945_rx_queue_restock(il); } /* 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 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq) { int i; for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { if (rxq->pool[i].page != NULL) { pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma, PAGE_SIZE << il->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); __il_free_pages(il, rxq->pool[i].page); rxq->pool[i].page = NULL; } } dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, rxq->bd_dma); dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_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 il3945_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]; } /** * il3945_rx_handle - Main entry function for receiving responses from uCode * * Uses the il->handlers callback function array to invoke * the appropriate handlers, including command responses, * frame-received notifications, and other notifications. */ static void il3945_rx_handle(struct il_priv *il) { struct il_rx_buf *rxb; struct il_rx_pkt *pkt; struct il_rx_queue *rxq = &il->rxq; u32 r, i; int reclaim; unsigned long flags; u8 fill_rx = 0; u32 count = 8; int total_empty = 0; /* uCode's read idx (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 - 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) D_RX("r = %d, i = %d\n", r, i); while (i != r) { int len; 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_page(il->pci_dev, rxb->page_dma, PAGE_SIZE << il->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); pkt = rxb_addr(rxb); len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK; len += sizeof(u32); /* account for status word */ reclaim = il_need_reclaim(il, pkt); /* Based on type of command response or notification, * handle those that need handling via function in * handlers table. See il3945_setup_handlers() */ if (il->handlers[pkt->hdr.cmd]) { D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); il->isr_stats.handlers[pkt->hdr.cmd]++; il->handlers[pkt->hdr.cmd] (il, rxb); } else { /* No handling needed */ D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r, i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); } /* * XXX: After here, we should always check rxb->page * against NULL before touching it or its virtual * memory (pkt). Because some handler might have * already taken or freed the pages. */ if (reclaim) { /* Invoke any callbacks, transfer the buffer to caller, * and fire off the (possibly) blocking il_send_cmd() * as we reclaim the driver command queue */ if (rxb->page) il_tx_cmd_complete(il, rxb); else IL_WARN("Claim null rxb?\n"); } /* Reuse the page if possible. For notification packets and * SKBs that fail to Rx correctly, add them back into the * rx_free list for reuse later. */ spin_lock_irqsave(&rxq->lock, flags); if (rxb->page != NULL) { rxb->page_dma = pci_map_page(il->pci_dev, rxb->page, 0, PAGE_SIZE << il->hw_params. rx_page_order, PCI_DMA_FROMDEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, rxb->page_dma))) { __il_free_pages(il, rxb->page); rxb->page = NULL; list_add_tail(&rxb->list, &rxq->rx_used); } else { list_add_tail(&rxb->list, &rxq->rx_free); rxq->free_count++; } } else list_add_tail(&rxb->list, &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) { rxq->read = i; il3945_rx_replenish_now(il); count = 0; } } } /* Backtrack one entry */ rxq->read = i; if (fill_rx) il3945_rx_replenish_now(il); else il3945_rx_queue_restock(il); } /* call this function to flush any scheduled tasklet */ static inline void il3945_synchronize_irq(struct il_priv *il) { /* wait to make sure we flush pending tasklet */ synchronize_irq(il->pci_dev->irq); tasklet_kill(&il->irq_tasklet); } static const char * il3945_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)) void il3945_dump_nic_error_log(struct il_priv *il) { u32 i; u32 desc, time, count, base, data1; u32 blink1, blink2, ilink1, ilink2; base = le32_to_cpu(il->card_alive.error_event_table_ptr); if (!il3945_hw_valid_rtc_data_addr(base)) { IL_ERR("Not valid error log pointer 0x%08X\n", base); return; } count = il_read_targ_mem(il, base); if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { IL_ERR("Start IWL Error Log Dump:\n"); IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count); } IL_ERR("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 = il_read_targ_mem(il, base + i); time = il_read_targ_mem(il, base + i + 1 * sizeof(u32)); blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32)); blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32)); ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32)); ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32)); data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32)); IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n", il3945_desc_lookup(desc), desc, time, blink1, blink2, ilink1, ilink2, data1); } } static void il3945_irq_tasklet(unsigned long data) { struct il_priv *il = (struct il_priv *)data; u32 inta, handled = 0; u32 inta_fh; unsigned long flags; #ifdef CONFIG_IWLEGACY_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&il->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 = _il_rd(il, CSR_INT); _il_wr(il, 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 = _il_rd(il, CSR_FH_INT_STATUS); _il_wr(il, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & IL_DL_ISR) { /* just for debug */ inta_mask = _il_rd(il, CSR_INT_MASK); D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif spin_unlock_irqrestore(&il->lock, flags); /* 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) { IL_ERR("Hardware error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ il_disable_interrupts(il); il->isr_stats.hw++; il_irq_handle_error(il); handled |= CSR_INT_BIT_HW_ERR; return; } #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & (IL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { D_ISR("Scheduler finished to transmit " "the frame/frames.\n"); il->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { D_ISR("Alive interrupt\n"); il->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) { IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n", inta); il->isr_stats.sw++; il_irq_handle_error(il); handled |= CSR_INT_BIT_SW_ERR; } /* uCode wakes up after power-down sleep */ if (inta & CSR_INT_BIT_WAKEUP) { D_ISR("Wakeup interrupt\n"); il_rx_queue_update_write_ptr(il, &il->rxq); spin_lock_irqsave(&il->lock, flags); il_txq_update_write_ptr(il, &il->txq[0]); il_txq_update_write_ptr(il, &il->txq[1]); il_txq_update_write_ptr(il, &il->txq[2]); il_txq_update_write_ptr(il, &il->txq[3]); il_txq_update_write_ptr(il, &il->txq[4]); spin_unlock_irqrestore(&il->lock, flags); il->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)) { il3945_rx_handle(il); il->isr_stats.rx++; handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } if (inta & CSR_INT_BIT_FH_TX) { D_ISR("Tx interrupt\n"); il->isr_stats.tx++; _il_wr(il, CSR_FH_INT_STATUS, (1 << 6)); il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0); handled |= CSR_INT_BIT_FH_TX; } if (inta & ~handled) { IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled); il->isr_stats.unhandled++; } if (inta & ~il->inta_mask) { IL_WARN("Disabled INTA bits 0x%08x were pending\n", inta & ~il->inta_mask); IL_WARN(" with inta_fh = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if disabled by irq */ if (test_bit(S_INT_ENABLED, &il->status)) il_enable_interrupts(il); #ifdef CONFIG_IWLEGACY_DEBUG if (il_get_debug_level(il) & (IL_DL_ISR)) { inta = _il_rd(il, CSR_INT); inta_mask = _il_rd(il, CSR_INT_MASK); inta_fh = _il_rd(il, CSR_FH_INT_STATUS); D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif } static int il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band, u8 is_active, u8 n_probes, struct il3945_scan_channel *scan_ch, struct ieee80211_vif *vif) { struct ieee80211_channel *chan; const struct ieee80211_supported_band *sband; const struct il_channel_info *ch_info; u16 passive_dwell = 0; u16 active_dwell = 0; int added, i; sband = il_get_hw_mode(il, band); if (!sband) return 0; active_dwell = il_get_active_dwell_time(il, band, n_probes); passive_dwell = il_get_passive_dwell_time(il, band, vif); if (passive_dwell <= active_dwell) passive_dwell = active_dwell + 1; for (i = 0, added = 0; i < il->scan_request->n_channels; i++) { chan = il->scan_request->channels[i]; if (chan->band != band) continue; scan_ch->channel = chan->hw_value; ch_info = il_get_channel_info(il, band, scan_ch->channel); if (!il_is_channel_valid(ch_info)) { D_SCAN("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 || il_is_channel_passive(ch_info) || (chan->flags & IEEE80211_CHAN_NO_IR)) { scan_ch->type = 0; /* passive */ if (IL_UCODE_API(il->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 (IL_UCODE_API(il->ucode_ver) >= 2) { if (n_probes) scan_ch->type |= IL39_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 |= IL39_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 == NL80211_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; */ } D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel, (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE", (scan_ch->type & 1) ? active_dwell : passive_dwell); scan_ch++; added++; } D_SCAN("total channels to scan %d\n", added); return added; } static void il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates) { int i; for (i = 0; i < RATE_COUNT_LEGACY; i++) { rates[i].bitrate = il3945_rates[i].ieee * 5; rates[i].hw_value = i; /* Rate scaling will work on idxes */ rates[i].hw_value_short = i; rates[i].flags = 0; if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) { /* * If CCK != 1M then set short preamble rate flag. */ rates[i].flags |= (il3945_rates[i].plcp == 10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void il3945_dealloc_ucode_pci(struct il_priv *il) { il_free_fw_desc(il->pci_dev, &il->ucode_code); il_free_fw_desc(il->pci_dev, &il->ucode_data); il_free_fw_desc(il->pci_dev, &il->ucode_data_backup); il_free_fw_desc(il->pci_dev, &il->ucode_init); il_free_fw_desc(il->pci_dev, &il->ucode_init_data); il_free_fw_desc(il->pci_dev, &il->ucode_boot); } /** * il3945_verify_inst_full - verify runtime uCode image in card vs. host, * looking at all data. */ static int il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len) { u32 val; u32 save_len = len; int rc = 0; u32 errcnt; D_INFO("ucode inst image size is %u\n", len); il_wr(il, HBUS_TARG_MEM_RADDR, IL39_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 IL_DL_IO is set */ val = _il_rd(il, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { IL_ERR("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) D_INFO("ucode image in INSTRUCTION memory is good\n"); return rc; } /** * il3945_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 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len) { u32 val; int rc = 0; u32 errcnt = 0; u32 i; D_INFO("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 IL_DL_IO is set */ il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND); val = _il_rd(il, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { #if 0 /* Enable this if you want to see details */ IL_ERR("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; } /** * il3945_verify_ucode - determine which instruction image is in SRAM, * and verify its contents */ static int il3945_verify_ucode(struct il_priv *il) { __le32 *image; u32 len; int rc = 0; /* Try bootstrap */ image = (__le32 *) il->ucode_boot.v_addr; len = il->ucode_boot.len; rc = il3945_verify_inst_sparse(il, image, len); if (rc == 0) { D_INFO("Bootstrap uCode is good in inst SRAM\n"); return 0; } /* Try initialize */ image = (__le32 *) il->ucode_init.v_addr; len = il->ucode_init.len; rc = il3945_verify_inst_sparse(il, image, len); if (rc == 0) { D_INFO("Initialize uCode is good in inst SRAM\n"); return 0; } /* Try runtime/protocol */ image = (__le32 *) il->ucode_code.v_addr; len = il->ucode_code.len; rc = il3945_verify_inst_sparse(il, image, len); if (rc == 0) { D_INFO("Runtime uCode is good in inst SRAM\n"); return 0; } IL_ERR("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 *) il->ucode_boot.v_addr; len = il->ucode_boot.len; rc = il3945_verify_inst_full(il, image, len); return rc; } static void il3945_nic_start(struct il_priv *il) { /* Remove all resets to allow NIC to operate */ _il_wr(il, CSR_RESET, 0); } #define IL3945_UCODE_GET(item) \ static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\ { \ return le32_to_cpu(ucode->v1.item); \ } static u32 il3945_ucode_get_header_size(u32 api_ver) { return 24; } static u8 * il3945_ucode_get_data(const struct il_ucode_header *ucode) { return (u8 *) ucode->v1.data; } IL3945_UCODE_GET(inst_size); IL3945_UCODE_GET(data_size); IL3945_UCODE_GET(init_size); IL3945_UCODE_GET(init_data_size); IL3945_UCODE_GET(boot_size); /** * il3945_read_ucode - Read uCode images from disk file. * * Copy into buffers for card to fetch via bus-mastering */ static int il3945_read_ucode(struct il_priv *il) { const struct il_ucode_header *ucode; int ret = -EINVAL, idx; const struct firmware *ucode_raw; /* firmware file name contains uCode/driver compatibility version */ const char *name_pre = il->cfg->fw_name_pre; const unsigned int api_max = il->cfg->ucode_api_max; const unsigned int api_min = il->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 (idx = api_max; idx >= api_min; idx--) { sprintf(buf, "%s%u%s", name_pre, idx, ".ucode"); ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev); if (ret < 0) { IL_ERR("%s firmware file req failed: %d\n", buf, ret); if (ret == -ENOENT) continue; else goto error; } else { if (idx < api_max) IL_ERR("Loaded firmware %s, " "which is deprecated. " " Please use API v%u instead.\n", buf, api_max); D_INFO("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 < il3945_ucode_get_header_size(1)) { IL_ERR("File size way too small!\n"); ret = -EINVAL; goto err_release; } /* Data from ucode file: header followed by uCode images */ ucode = (struct il_ucode_header *)ucode_raw->data; il->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IL_UCODE_API(il->ucode_ver); inst_size = il3945_ucode_get_inst_size(ucode); data_size = il3945_ucode_get_data_size(ucode); init_size = il3945_ucode_get_init_size(ucode); init_data_size = il3945_ucode_get_init_data_size(ucode); boot_size = il3945_ucode_get_boot_size(ucode); src = il3945_ucode_get_data(ucode); /* 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) { IL_ERR("Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); il->ucode_ver = 0; ret = -EINVAL; goto err_release; } if (api_ver != api_max) IL_ERR("Firmware has old API version. Expected %u, " "got %u. New firmware can be obtained " "from http://www.intellinuxwireless.org.\n", api_max, api_ver); IL_INFO("loaded firmware version %u.%u.%u.%u\n", IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version), "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver)); D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver); D_INFO("f/w package hdr runtime inst size = %u\n", inst_size); D_INFO("f/w package hdr runtime data size = %u\n", data_size); D_INFO("f/w package hdr init inst size = %u\n", init_size); D_INFO("f/w package hdr init data size = %u\n", init_data_size); D_INFO("f/w package hdr boot inst size = %u\n", boot_size); /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size != il3945_ucode_get_header_size(api_ver) + inst_size + data_size + init_size + init_data_size + boot_size) { D_INFO("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 > IL39_MAX_INST_SIZE) { D_INFO("uCode instr len %d too large to fit in\n", inst_size); ret = -EINVAL; goto err_release; } if (data_size > IL39_MAX_DATA_SIZE) { D_INFO("uCode data len %d too large to fit in\n", data_size); ret = -EINVAL; goto err_release; } if (init_size > IL39_MAX_INST_SIZE) { D_INFO("uCode init instr len %d too large to fit in\n", init_size); ret = -EINVAL; goto err_release; } if (init_data_size > IL39_MAX_DATA_SIZE) { D_INFO("uCode init data len %d too large to fit in\n", init_data_size); ret = -EINVAL; goto err_release; } if (boot_size > IL39_MAX_BSM_SIZE) { D_INFO("uCode boot instr len %d too large to fit in\n", boot_size); ret = -EINVAL; goto err_release; } /* Allocate ucode buffers for card's bus-master loading ... */ /* Runtime instructions and 2 copies of data: * 1) unmodified from disk * 2) backup cache for save/restore during power-downs */ il->ucode_code.len = inst_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_code); il->ucode_data.len = data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_data); il->ucode_data_backup.len = data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup); if (!il->ucode_code.v_addr || !il->ucode_data.v_addr || !il->ucode_data_backup.v_addr) goto err_pci_alloc; /* Initialization instructions and data */ if (init_size && init_data_size) { il->ucode_init.len = init_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_init); il->ucode_init_data.len = init_data_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data); if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr) goto err_pci_alloc; } /* Bootstrap (instructions only, no data) */ if (boot_size) { il->ucode_boot.len = boot_size; il_alloc_fw_desc(il->pci_dev, &il->ucode_boot); if (!il->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; D_INFO("Copying (but not loading) uCode instr len %zd\n", len); memcpy(il->ucode_code.v_addr, src, len); src += len; D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", il->ucode_code.v_addr, (u32) il->ucode_code.p_addr); /* Runtime data (2nd block) * NOTE: Copy into backup buffer will be done in il3945_up() */ len = data_size; D_INFO("Copying (but not loading) uCode data len %zd\n", len); memcpy(il->ucode_data.v_addr, src, len); memcpy(il->ucode_data_backup.v_addr, src, len); src += len; /* Initialization instructions (3rd block) */ if (init_size) { len = init_size; D_INFO("Copying (but not loading) init instr len %zd\n", len); memcpy(il->ucode_init.v_addr, src, len); src += len; } /* Initialization data (4th block) */ if (init_data_size) { len = init_data_size; D_INFO("Copying (but not loading) init data len %zd\n", len); memcpy(il->ucode_init_data.v_addr, src, len); src += len; } /* Bootstrap instructions (5th block) */ len = boot_size; D_INFO("Copying (but not loading) boot instr len %zd\n", len); memcpy(il->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: IL_ERR("failed to allocate pci memory\n"); ret = -ENOMEM; il3945_dealloc_ucode_pci(il); err_release: release_firmware(ucode_raw); error: return ret; } /** * il3945_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 il3945_set_ucode_ptrs(struct il_priv *il) { dma_addr_t pinst; dma_addr_t pdata; /* bits 31:0 for 3945 */ pinst = il->ucode_code.p_addr; pdata = il->ucode_data_backup.p_addr; /* Tell bootstrap uCode where to find image to load */ il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst); il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata); il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->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 */ il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG, il->ucode_code.len | BSM_DRAM_INST_LOAD); D_INFO("Runtime uCode pointers are set.\n"); return 0; } /** * il3945_init_alive_start - Called after N_ALIVE notification received * * Called after N_ALIVE notification received from "initialize" uCode. * * Tell "initialize" uCode to go ahead and load the runtime uCode. */ static void il3945_init_alive_start(struct il_priv *il) { /* Check alive response for "valid" sign from uCode */ if (il->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 */ D_INFO("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 (il3945_verify_ucode(il)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ D_INFO("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. */ D_INFO("Initialization Alive received.\n"); if (il3945_set_ucode_ptrs(il)) { /* Runtime instruction load won't happen; * take it all the way back down so we can try again */ D_INFO("Couldn't set up uCode pointers.\n"); goto restart; } return; restart: queue_work(il->workqueue, &il->restart); } /** * il3945_alive_start - called after N_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by il3945_init_alive_start()). */ static void il3945_alive_start(struct il_priv *il) { int thermal_spin = 0; u32 rfkill; D_INFO("Runtime Alive received.\n"); if (il->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 */ D_INFO("Alive failed.\n"); goto restart; } /* Initialize uCode has loaded Runtime uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "runtime" alive if code weren't properly loaded. */ if (il3945_verify_ucode(il)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ D_INFO("Bad runtime uCode load.\n"); goto restart; } rfkill = il_rd_prph(il, APMG_RFKILL_REG); D_INFO("RFKILL status: 0x%x\n", rfkill); if (rfkill & 0x1) { clear_bit(S_RFKILL, &il->status); /* if RFKILL is not on, then wait for thermal * sensor in adapter to kick in */ while (il3945_hw_get_temperature(il) == 0) { thermal_spin++; udelay(10); } if (thermal_spin) D_INFO("Thermal calibration took %dus\n", thermal_spin * 10); } else set_bit(S_RFKILL, &il->status); /* After the ALIVE response, we can send commands to 3945 uCode */ set_bit(S_ALIVE, &il->status); /* Enable watchdog to monitor the driver tx queues */ il_setup_watchdog(il); if (il_is_rfkill(il)) return; ieee80211_wake_queues(il->hw); il->active_rate = RATES_MASK_3945; il_power_update_mode(il, true); if (il_is_associated(il)) { struct il3945_rxon_cmd *active_rxon = (struct il3945_rxon_cmd *)(&il->active); il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ il_connection_init_rx_config(il); } /* Configure Bluetooth device coexistence support */ il_send_bt_config(il); set_bit(S_READY, &il->status); /* Configure the adapter for unassociated operation */ il3945_commit_rxon(il); il3945_reg_txpower_periodic(il); D_INFO("ALIVE processing complete.\n"); wake_up(&il->wait_command_queue); return; restart: queue_work(il->workqueue, &il->restart); } static void il3945_cancel_deferred_work(struct il_priv *il); static void __il3945_down(struct il_priv *il) { unsigned long flags; int exit_pending; D_INFO(DRV_NAME " is going down\n"); il_scan_cancel_timeout(il, 200); exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status); /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set * to prevent rearm timer */ del_timer_sync(&il->watchdog); /* Station information will now be cleared in device */ il_clear_ucode_stations(il); il_dealloc_bcast_stations(il); il_clear_driver_stations(il); /* Unblock any waiting calls */ wake_up_all(&il->wait_command_queue); /* Wipe out the EXIT_PENDING status bit if we are not actually * exiting the module */ if (!exit_pending) clear_bit(S_EXIT_PENDING, &il->status); /* stop and reset the on-board processor */ _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); il3945_synchronize_irq(il); if (il->mac80211_registered) ieee80211_stop_queues(il->hw); /* If we have not previously called il3945_init() then * clear all bits but the RF Kill bits and return */ if (!il_is_init(il)) { il->status = test_bit(S_RFKILL, &il->status) << S_RFKILL | test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill * bit and continue taking the NIC down. */ il->status &= test_bit(S_RFKILL, &il->status) << S_RFKILL | test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED | test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR | test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING; /* * We disabled and synchronized interrupt, and priv->mutex is taken, so * here is the only thread which will program device registers, but * still have lockdep assertions, so we are taking reg_lock. */ spin_lock_irq(&il->reg_lock); /* FIXME: il_grab_nic_access if rfkill is off ? */ il3945_hw_txq_ctx_stop(il); il3945_hw_rxq_stop(il); /* Power-down device's busmaster DMA clocks */ _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(5); /* Stop the device, and put it in low power state */ _il_apm_stop(il); spin_unlock_irq(&il->reg_lock); il3945_hw_txq_ctx_free(il); exit: memset(&il->card_alive, 0, sizeof(struct il_alive_resp)); if (il->beacon_skb) dev_kfree_skb(il->beacon_skb); il->beacon_skb = NULL; /* clear out any free frames */ il3945_clear_free_frames(il); } static void il3945_down(struct il_priv *il) { mutex_lock(&il->mutex); __il3945_down(il); mutex_unlock(&il->mutex); il3945_cancel_deferred_work(il); } #define MAX_HW_RESTARTS 5 static int il3945_alloc_bcast_station(struct il_priv *il) { unsigned long flags; u8 sta_id; spin_lock_irqsave(&il->sta_lock, flags); sta_id = il_prep_station(il, il_bcast_addr, false, NULL); if (sta_id == IL_INVALID_STATION) { IL_ERR("Unable to prepare broadcast station\n"); spin_unlock_irqrestore(&il->sta_lock, flags); return -EINVAL; } il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE; il->stations[sta_id].used |= IL_STA_BCAST; spin_unlock_irqrestore(&il->sta_lock, flags); return 0; } static int __il3945_up(struct il_priv *il) { int rc, i; rc = il3945_alloc_bcast_station(il); if (rc) return rc; if (test_bit(S_EXIT_PENDING, &il->status)) { IL_WARN("Exit pending; will not bring the NIC up\n"); return -EIO; } if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) { IL_ERR("ucode not available for device bring up\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(S_RFKILL, &il->status); else { set_bit(S_RFKILL, &il->status); return -ERFKILL; } _il_wr(il, CSR_INT, 0xFFFFFFFF); rc = il3945_hw_nic_init(il); if (rc) { IL_ERR("Unable to int nic\n"); return rc; } /* make sure rfkill handshake bits are cleared */ _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ _il_wr(il, CSR_INT, 0xFFFFFFFF); il_enable_interrupts(il); /* really make sure rfkill handshake bits are cleared */ _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); _il_wr(il, 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(il->ucode_data_backup.v_addr, il->ucode_data.v_addr, il->ucode_data.len); /* We return success when we resume from suspend and rf_kill is on. */ if (test_bit(S_RFKILL, &il->status)) return 0; for (i = 0; i < MAX_HW_RESTARTS; i++) { /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ rc = il->ops->load_ucode(il); if (rc) { IL_ERR("Unable to set up bootstrap uCode: %d\n", rc); continue; } /* start card; "initialize" will load runtime ucode */ il3945_nic_start(il); D_INFO(DRV_NAME " is coming up\n"); return 0; } set_bit(S_EXIT_PENDING, &il->status); __il3945_down(il); clear_bit(S_EXIT_PENDING, &il->status); /* tried to restart and config the device for as long as our * patience could withstand */ IL_ERR("Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void il3945_bg_init_alive_start(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, init_alive_start.work); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) goto out; il3945_init_alive_start(il); out: mutex_unlock(&il->mutex); } static void il3945_bg_alive_start(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, alive_start.work); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL) goto out; il3945_alive_start(il); out: mutex_unlock(&il->mutex); } /* * 3945 cannot interrupt driver when hardware rf kill switch toggles; * driver must poll CSR_GP_CNTRL_REG register for change. This register * *is* readable even when device has been SW_RESET into low power mode * (e.g. during RF KILL). */ static void il3945_rfkill_poll(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, _3945.rfkill_poll.work); bool old_rfkill = test_bit(S_RFKILL, &il->status); bool new_rfkill = !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); if (new_rfkill != old_rfkill) { if (new_rfkill) set_bit(S_RFKILL, &il->status); else clear_bit(S_RFKILL, &il->status); wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill); D_RF_KILL("RF_KILL bit toggled to %s.\n", new_rfkill ? "disable radio" : "enable radio"); } /* Keep this running, even if radio now enabled. This will be * cancelled in mac_start() if system decides to start again */ queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, round_jiffies_relative(2 * HZ)); } int il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif) { struct il_host_cmd cmd = { .id = C_SCAN, .len = sizeof(struct il3945_scan_cmd), .flags = CMD_SIZE_HUGE, }; struct il3945_scan_cmd *scan; u8 n_probes = 0; enum nl80211_band band; bool is_active = false; int ret; u16 len; lockdep_assert_held(&il->mutex); if (!il->scan_cmd) { il->scan_cmd = kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE, GFP_KERNEL); if (!il->scan_cmd) { D_SCAN("Fail to allocate scan memory\n"); return -ENOMEM; } } scan = il->scan_cmd; memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE); scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH; scan->quiet_time = IL_ACTIVE_QUIET_TIME; if (il_is_associated(il)) { u16 interval; u32 extra; u32 suspend_time = 100; u32 scan_suspend_time = 100; D_INFO("Scanning while associated...\n"); interval = vif->bss_conf.beacon_int; 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); D_SCAN("suspend_time 0x%X beacon interval %d\n", scan_suspend_time, interval); } if (il->scan_request->n_ssids) { int i, p = 0; D_SCAN("Kicking off active scan\n"); for (i = 0; i < il->scan_request->n_ssids; i++) { /* always does wildcard anyway */ if (!il->scan_request->ssids[i].ssid_len) continue; scan->direct_scan[p].id = WLAN_EID_SSID; scan->direct_scan[p].len = il->scan_request->ssids[i].ssid_len; memcpy(scan->direct_scan[p].ssid, il->scan_request->ssids[i].ssid, il->scan_request->ssids[i].ssid_len); n_probes++; p++; } is_active = true; } else D_SCAN("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 = il->hw_params.bcast_id; scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; /* flags + rate selection */ switch (il->scan_band) { case NL80211_BAND_2GHZ: scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; scan->tx_cmd.rate = RATE_1M_PLCP; band = NL80211_BAND_2GHZ; break; case NL80211_BAND_5GHZ: scan->tx_cmd.rate = RATE_6M_PLCP; band = NL80211_BAND_5GHZ; break; default: IL_WARN("Invalid scan band\n"); return -EIO; } /* * If active scaning is requested but a certain channel is marked * passive, we can do active scanning if we detect transmissions. For * passive only scanning disable switching to active on any channel. */ scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; len = il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, vif->addr, il->scan_request->ie, il->scan_request->ie_len, IL_MAX_SCAN_SIZE - sizeof(*scan)); scan->tx_cmd.len = cpu_to_le16(len); /* select Rx antennas */ scan->flags |= il3945_get_antenna_flags(il); scan->channel_count = il3945_get_channels_for_scan(il, band, is_active, n_probes, (void *)&scan->data[len], vif); if (scan->channel_count == 0) { D_SCAN("channel count %d\n", scan->channel_count); return -EIO; } cmd.len += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct il3945_scan_channel); cmd.data = scan; scan->len = cpu_to_le16(cmd.len); set_bit(S_SCAN_HW, &il->status); ret = il_send_cmd_sync(il, &cmd); if (ret) clear_bit(S_SCAN_HW, &il->status); return ret; } void il3945_post_scan(struct il_priv *il) { /* * Since setting the RXON may have been deferred while * performing the scan, fire one off if needed */ if (memcmp(&il->staging, &il->active, sizeof(il->staging))) il3945_commit_rxon(il); } static void il3945_bg_restart(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, restart); if (test_bit(S_EXIT_PENDING, &il->status)) return; if (test_and_clear_bit(S_FW_ERROR, &il->status)) { mutex_lock(&il->mutex); il->is_open = 0; mutex_unlock(&il->mutex); il3945_down(il); ieee80211_restart_hw(il->hw); } else { il3945_down(il); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) { mutex_unlock(&il->mutex); return; } __il3945_up(il); mutex_unlock(&il->mutex); } } static void il3945_bg_rx_replenish(struct work_struct *data) { struct il_priv *il = container_of(data, struct il_priv, rx_replenish); mutex_lock(&il->mutex); if (test_bit(S_EXIT_PENDING, &il->status)) goto out; il3945_rx_replenish(il); out: mutex_unlock(&il->mutex); } void il3945_post_associate(struct il_priv *il) { int rc = 0; if (!il->vif || !il->is_open) return; D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid, il->active.bssid_addr); if (test_bit(S_EXIT_PENDING, &il->status)) return; il_scan_cancel_timeout(il, 200); il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; il3945_commit_rxon(il); rc = il_send_rxon_timing(il); if (rc) IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n"); il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid); D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid, il->vif->bss_conf.beacon_int); if (il->vif->bss_conf.use_short_preamble) il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (il->staging.flags & RXON_FLG_BAND_24G_MSK) { if (il->vif->bss_conf.use_short_slot) il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; else il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } il3945_commit_rxon(il); switch (il->vif->type) { case NL80211_IFTYPE_STATION: il3945_rate_scale_init(il->hw, IL_AP_ID); break; case NL80211_IFTYPE_ADHOC: il3945_send_beacon_cmd(il); break; default: IL_ERR("%s Should not be called in %d mode\n", __func__, il->vif->type); break; } } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (2 * HZ) static int il3945_mac_start(struct ieee80211_hw *hw) { struct il_priv *il = hw->priv; int ret; /* we should be verifying the device is ready to be opened */ mutex_lock(&il->mutex); D_MAC80211("enter\n"); /* fetch ucode file from disk, alloc and copy to bus-master buffers ... * ucode filename and max sizes are card-specific. */ if (!il->ucode_code.len) { ret = il3945_read_ucode(il); if (ret) { IL_ERR("Could not read microcode: %d\n", ret); mutex_unlock(&il->mutex); goto out_release_irq; } } ret = __il3945_up(il); mutex_unlock(&il->mutex); if (ret) goto out_release_irq; D_INFO("Start UP work.\n"); /* Wait for START_ALIVE from ucode. Otherwise callbacks from * mac80211 will not be run successfully. */ ret = wait_event_timeout(il->wait_command_queue, test_bit(S_READY, &il->status), UCODE_READY_TIMEOUT); if (!ret) { if (!test_bit(S_READY, &il->status)) { IL_ERR("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(&il->_3945.rfkill_poll); il->is_open = 1; D_MAC80211("leave\n"); return 0; out_release_irq: il->is_open = 0; D_MAC80211("leave - failed\n"); return ret; } static void il3945_mac_stop(struct ieee80211_hw *hw) { struct il_priv *il = hw->priv; D_MAC80211("enter\n"); if (!il->is_open) { D_MAC80211("leave - skip\n"); return; } il->is_open = 0; il3945_down(il); flush_workqueue(il->workqueue); /* start polling the killswitch state again */ queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, round_jiffies_relative(2 * HZ)); D_MAC80211("leave\n"); } static void il3945_mac_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, struct sk_buff *skb) { struct il_priv *il = hw->priv; D_MAC80211("enter\n"); D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (il3945_tx_skb(il, control->sta, skb)) dev_kfree_skb_any(skb); D_MAC80211("leave\n"); } void il3945_config_ap(struct il_priv *il) { struct ieee80211_vif *vif = il->vif; int rc = 0; if (test_bit(S_EXIT_PENDING, &il->status)) return; /* The following should be done only at AP bring up */ if (!(il_is_associated(il))) { /* RXON - unassoc (to set timing command) */ il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; il3945_commit_rxon(il); /* RXON Timing */ rc = il_send_rxon_timing(il); if (rc) IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n"); il->staging.assoc_id = 0; if (vif->bss_conf.use_short_preamble) il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (il->staging.flags & RXON_FLG_BAND_24G_MSK) { if (vif->bss_conf.use_short_slot) il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; else il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; il3945_commit_rxon(il); } il3945_send_beacon_cmd(il); } static int il3945_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 il_priv *il = hw->priv; int ret = 0; u8 sta_id = IL_INVALID_STATION; u8 static_key; D_MAC80211("enter\n"); if (il3945_mod_params.sw_crypto) { D_MAC80211("leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } /* * To support IBSS RSN, don't program group keys in IBSS, the * hardware will then not attempt to decrypt the frames. */ if (vif->type == NL80211_IFTYPE_ADHOC && !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { D_MAC80211("leave - IBSS RSN\n"); return -EOPNOTSUPP; } static_key = !il_is_associated(il); if (!static_key) { sta_id = il_sta_id_or_broadcast(il, sta); if (sta_id == IL_INVALID_STATION) { D_MAC80211("leave - station not found\n"); return -EINVAL; } } mutex_lock(&il->mutex); il_scan_cancel_timeout(il, 100); switch (cmd) { case SET_KEY: if (static_key) ret = il3945_set_static_key(il, key); else ret = il3945_set_dynamic_key(il, key, sta_id); D_MAC80211("enable hwcrypto key\n"); break; case DISABLE_KEY: if (static_key) ret = il3945_remove_static_key(il); else ret = il3945_clear_sta_key_info(il, sta_id); D_MAC80211("disable hwcrypto key\n"); break; default: ret = -EINVAL; } D_MAC80211("leave ret %d\n", ret); mutex_unlock(&il->mutex); return ret; } static int il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct il_priv *il = hw->priv; struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv; int ret; bool is_ap = vif->type == NL80211_IFTYPE_STATION; u8 sta_id; mutex_lock(&il->mutex); D_INFO("station %pM\n", sta->addr); sta_priv->common.sta_id = IL_INVALID_STATION; ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id); if (ret) { IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret); /* Should we return success if return code is EEXIST ? */ mutex_unlock(&il->mutex); return ret; } sta_priv->common.sta_id = sta_id; /* Initialize rate scaling */ D_INFO("Initializing rate scaling for station %pM\n", sta->addr); il3945_rs_rate_init(il, sta, sta_id); mutex_unlock(&il->mutex); return 0; } static void il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct il_priv *il = hw->priv; __le32 filter_or = 0, filter_nand = 0; #define CHK(test, flag) do { \ if (*total_flags & (test)) \ filter_or |= (flag); \ else \ filter_nand |= (flag); \ } while (0) D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, *total_flags); CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK); CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); #undef CHK mutex_lock(&il->mutex); il->staging.filter_flags &= ~filter_nand; il->staging.filter_flags |= filter_or; /* * Not committing directly because hardware can perform a scan, * but even if hw is ready, committing here breaks for some reason, * we'll eventually commit the filter flags change anyway. */ mutex_unlock(&il->mutex); /* * Receiving all multicast frames is always enabled by the * default flags setup in il_connection_init_rx_config() * since we currently do not support programming multicast * filters into the device. */ *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLEGACY_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 il3945_show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "0x%08X\n", il_get_debug_level(il)); } static ssize_t il3945_store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); unsigned long val; int ret; ret = kstrtoul(buf, 0, &val); if (ret) IL_INFO("%s is not in hex or decimal form.\n", buf); else il->debug_level = val; return strnlen(buf, count); } static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level, il3945_store_debug_level); #endif /* CONFIG_IWLEGACY_DEBUG */ static ssize_t il3945_show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); if (!il_is_alive(il)) return -EAGAIN; return sprintf(buf, "%d\n", il3945_hw_get_temperature(il)); } static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL); static ssize_t il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "%d\n", il->tx_power_user_lmt); } static ssize_t il3945_store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); char *p = (char *)buf; u32 val; val = simple_strtoul(p, &p, 10); if (p == buf) IL_INFO(": %s is not in decimal form.\n", buf); else il3945_hw_reg_set_txpower(il, val); return count; } static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power); static ssize_t il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "0x%04X\n", il->active.flags); } static ssize_t il3945_store_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); u32 flags = simple_strtoul(buf, NULL, 0); mutex_lock(&il->mutex); if (le32_to_cpu(il->staging.flags) != flags) { /* Cancel any currently running scans... */ if (il_scan_cancel_timeout(il, 100)) IL_WARN("Could not cancel scan.\n"); else { D_INFO("Committing rxon.flags = 0x%04X\n", flags); il->staging.flags = cpu_to_le32(flags); il3945_commit_rxon(il); } } mutex_unlock(&il->mutex); return count; } static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags); static ssize_t il3945_show_filter_flags(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags)); } static ssize_t il3945_store_filter_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); u32 filter_flags = simple_strtoul(buf, NULL, 0); mutex_lock(&il->mutex); if (le32_to_cpu(il->staging.filter_flags) != filter_flags) { /* Cancel any currently running scans... */ if (il_scan_cancel_timeout(il, 100)) IL_WARN("Could not cancel scan.\n"); else { D_INFO("Committing rxon.filter_flags = " "0x%04X\n", filter_flags); il->staging.filter_flags = cpu_to_le32(filter_flags); il3945_commit_rxon(il); } } mutex_unlock(&il->mutex); return count; } static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags, il3945_store_filter_flags); static ssize_t il3945_show_measurement(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); struct il_spectrum_notification measure_report; u32 size = sizeof(measure_report), len = 0, ofs = 0; u8 *data = (u8 *) &measure_report; unsigned long flags; spin_lock_irqsave(&il->lock, flags); if (!(il->measurement_status & MEASUREMENT_READY)) { spin_unlock_irqrestore(&il->lock, flags); return 0; } memcpy(&measure_report, &il->measure_report, size); il->measurement_status = 0; spin_unlock_irqrestore(&il->lock, flags); while (size && PAGE_SIZE - len) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, true); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static ssize_t il3945_store_measurement(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); struct ieee80211_measurement_params params = { .channel = le16_to_cpu(il->active.channel), .start_time = cpu_to_le64(il->_3945.last_tsf), .duration = cpu_to_le16(1), }; u8 type = IL_MEASURE_BASIC; u8 buffer[32]; u8 channel; if (count) { char *p = buffer; strlcpy(buffer, buf, sizeof(buffer)); 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); } D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n", type, params.channel, buf); il3945_get_measurement(il, ¶ms, type); return count; } static DEVICE_ATTR(measurement, 0600, il3945_show_measurement, il3945_store_measurement); static ssize_t il3945_store_retry_rate(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); il->retry_rate = simple_strtoul(buf, NULL, 0); if (il->retry_rate <= 0) il->retry_rate = 1; return count; } static ssize_t il3945_show_retry_rate(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); return sprintf(buf, "%d", il->retry_rate); } static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate, il3945_store_retry_rate); static ssize_t il3945_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, 0400, il3945_show_channels, NULL); static ssize_t il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); if (!il_is_alive(il)) return -EAGAIN; return sprintf(buf, "%d\n", il3945_mod_params.antenna); } static ssize_t il3945_store_antenna(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il __maybe_unused = dev_get_drvdata(d); int ant; if (count == 0) return 0; if (sscanf(buf, "%1i", &ant) != 1) { D_INFO("not in hex or decimal form.\n"); return count; } if (ant >= 0 && ant <= 2) { D_INFO("Setting antenna select to %d.\n", ant); il3945_mod_params.antenna = (enum il3945_antenna)ant; } else D_INFO("Bad antenna select value %d.\n", ant); return count; } static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna); static ssize_t il3945_show_status(struct device *d, struct device_attribute *attr, char *buf) { struct il_priv *il = dev_get_drvdata(d); if (!il_is_alive(il)) return -EAGAIN; return sprintf(buf, "0x%08x\n", (int)il->status); } static DEVICE_ATTR(status, 0444, il3945_show_status, NULL); static ssize_t il3945_dump_error_log(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct il_priv *il = dev_get_drvdata(d); char *p = (char *)buf; if (p[0] == '1') il3945_dump_nic_error_log(il); return strnlen(buf, count); } static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log); /***************************************************************************** * * driver setup and tear down * *****************************************************************************/ static int il3945_setup_deferred_work(struct il_priv *il) { il->workqueue = create_singlethread_workqueue(DRV_NAME); if (!il->workqueue) return -ENOMEM; init_waitqueue_head(&il->wait_command_queue); INIT_WORK(&il->restart, il3945_bg_restart); INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish); INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start); INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start); INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll); il_setup_scan_deferred_work(il); il3945_hw_setup_deferred_work(il); timer_setup(&il->watchdog, il_bg_watchdog, 0); tasklet_init(&il->irq_tasklet, il3945_irq_tasklet, (unsigned long)il); return 0; } static void il3945_cancel_deferred_work(struct il_priv *il) { il3945_hw_cancel_deferred_work(il); cancel_delayed_work_sync(&il->init_alive_start); cancel_delayed_work(&il->alive_start); il_cancel_scan_deferred_work(il); } static struct attribute *il3945_sysfs_entries[] = { &dev_attr_antenna.attr, &dev_attr_channels.attr, &dev_attr_dump_errors.attr, &dev_attr_flags.attr, &dev_attr_filter_flags.attr, &dev_attr_measurement.attr, &dev_attr_retry_rate.attr, &dev_attr_status.attr, &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWLEGACY_DEBUG &dev_attr_debug_level.attr, #endif NULL }; static const struct attribute_group il3945_attribute_group = { .name = NULL, /* put in device directory */ .attrs = il3945_sysfs_entries, }; static struct ieee80211_ops il3945_mac_ops __ro_after_init = { .tx = il3945_mac_tx, .start = il3945_mac_start, .stop = il3945_mac_stop, .add_interface = il_mac_add_interface, .remove_interface = il_mac_remove_interface, .change_interface = il_mac_change_interface, .config = il_mac_config, .configure_filter = il3945_configure_filter, .set_key = il3945_mac_set_key, .conf_tx = il_mac_conf_tx, .reset_tsf = il_mac_reset_tsf, .bss_info_changed = il_mac_bss_info_changed, .hw_scan = il_mac_hw_scan, .sta_add = il3945_mac_sta_add, .sta_remove = il_mac_sta_remove, .tx_last_beacon = il_mac_tx_last_beacon, .flush = il_mac_flush, }; static int il3945_init_drv(struct il_priv *il) { int ret; struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom; il->retry_rate = 1; il->beacon_skb = NULL; spin_lock_init(&il->sta_lock); spin_lock_init(&il->hcmd_lock); INIT_LIST_HEAD(&il->free_frames); mutex_init(&il->mutex); il->ieee_channels = NULL; il->ieee_rates = NULL; il->band = NL80211_BAND_2GHZ; il->iw_mode = NL80211_IFTYPE_STATION; il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF; /* initialize force reset */ il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD; if (eeprom->version < EEPROM_3945_EEPROM_VERSION) { IL_WARN("Unsupported EEPROM version: 0x%04X\n", eeprom->version); ret = -EINVAL; goto err; } ret = il_init_channel_map(il); if (ret) { IL_ERR("initializing regulatory failed: %d\n", ret); goto err; } /* Set up txpower settings in driver for all channels */ if (il3945_txpower_set_from_eeprom(il)) { ret = -EIO; goto err_free_channel_map; } ret = il_init_geos(il); if (ret) { IL_ERR("initializing geos failed: %d\n", ret); goto err_free_channel_map; } il3945_init_hw_rates(il, il->ieee_rates); return 0; err_free_channel_map: il_free_channel_map(il); err: return ret; } #define IL3945_MAX_PROBE_REQUEST 200 static int il3945_setup_mac(struct il_priv *il) { int ret; struct ieee80211_hw *hw = il->hw; hw->rate_control_algorithm = "iwl-3945-rs"; hw->sta_data_size = sizeof(struct il3945_sta_priv); hw->vif_data_size = sizeof(struct il_vif_priv); /* Tell mac80211 our characteristics */ ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); ieee80211_hw_set(hw, SUPPORTS_PS); ieee80211_hw_set(hw, SIGNAL_DBM); ieee80211_hw_set(hw, SPECTRUM_MGMT); hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | REGULATORY_DISABLE_BEACON_HINTS; hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 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 = IL3945_MAX_PROBE_REQUEST - 24 - 2; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; if (il->bands[NL80211_BAND_2GHZ].n_channels) il->hw->wiphy->bands[NL80211_BAND_2GHZ] = &il->bands[NL80211_BAND_2GHZ]; if (il->bands[NL80211_BAND_5GHZ].n_channels) il->hw->wiphy->bands[NL80211_BAND_5GHZ] = &il->bands[NL80211_BAND_5GHZ]; il_leds_init(il); wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); ret = ieee80211_register_hw(il->hw); if (ret) { IL_ERR("Failed to register hw (error %d)\n", ret); return ret; } il->mac80211_registered = 1; return 0; } static int il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0; struct il_priv *il; struct ieee80211_hw *hw; struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data); struct il3945_eeprom *eeprom; unsigned long flags; /*********************** * 1. Allocating HW data * ********************/ hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops); if (!hw) { err = -ENOMEM; goto out; } il = hw->priv; il->hw = hw; SET_IEEE80211_DEV(hw, &pdev->dev); il->cmd_queue = IL39_CMD_QUEUE_NUM; D_INFO("*** LOAD DRIVER ***\n"); il->cfg = cfg; il->ops = &il3945_ops; #ifdef CONFIG_IWLEGACY_DEBUGFS il->debugfs_ops = &il3945_debugfs_ops; #endif il->pci_dev = pdev; il->inta_mask = CSR_INI_SET_MASK; /*************************** * 2. Initializing PCI bus * *************************/ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM); 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) { IL_WARN("No suitable DMA available.\n"); goto out_pci_disable_device; } pci_set_drvdata(pdev, il); err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; /*********************** * 3. Read REV Register * ********************/ il->hw_base = pci_ioremap_bar(pdev, 0); if (!il->hw_base) { err = -ENODEV; goto out_pci_release_regions; } D_INFO("pci_resource_len = 0x%08llx\n", (unsigned long long)pci_resource_len(pdev, 0)); D_INFO("pci_resource_base = %p\n", il->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); /* these spin locks will be used in apm_init and EEPROM access * we should init now */ spin_lock_init(&il->reg_lock); spin_lock_init(&il->lock); /* * stop and reset the on-board processor just in case it is in a * strange state ... like being left stranded by a primary kernel * and this is now the kdump kernel trying to start up */ _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /*********************** * 4. Read EEPROM * ********************/ /* Read the EEPROM */ err = il_eeprom_init(il); if (err) { IL_ERR("Unable to init EEPROM\n"); goto out_iounmap; } /* MAC Address location in EEPROM same for 3945/4965 */ eeprom = (struct il3945_eeprom *)il->eeprom; D_INFO("MAC address: %pM\n", eeprom->mac_address); SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address); /*********************** * 5. Setup HW Constants * ********************/ /* Device-specific setup */ err = il3945_hw_set_hw_params(il); if (err) { IL_ERR("failed to set hw settings\n"); goto out_eeprom_free; } /*********************** * 6. Setup il * ********************/ err = il3945_init_drv(il); if (err) { IL_ERR("initializing driver failed\n"); goto out_unset_hw_params; } IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name); /*********************** * 7. Setup Services * ********************/ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); pci_enable_msi(il->pci_dev); err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il); if (err) { IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq); goto out_disable_msi; } err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group); if (err) { IL_ERR("failed to create sysfs device attributes\n"); goto out_release_irq; } il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]); err = il3945_setup_deferred_work(il); if (err) goto out_remove_sysfs; il3945_setup_handlers(il); il_power_initialize(il); /********************************* * 8. Setup and Register mac80211 * *******************************/ il_enable_interrupts(il); err = il3945_setup_mac(il); if (err) goto out_destroy_workqueue; err = il_dbgfs_register(il, DRV_NAME); if (err) IL_ERR("failed to create debugfs files. Ignoring error: %d\n", err); /* Start monitoring the killswitch */ queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ); return 0; out_destroy_workqueue: destroy_workqueue(il->workqueue); il->workqueue = NULL; out_remove_sysfs: sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group); out_release_irq: free_irq(il->pci_dev->irq, il); out_disable_msi: pci_disable_msi(il->pci_dev); il_free_geos(il); il_free_channel_map(il); out_unset_hw_params: il3945_unset_hw_params(il); out_eeprom_free: il_eeprom_free(il); out_iounmap: iounmap(il->hw_base); out_pci_release_regions: pci_release_regions(pdev); out_pci_disable_device: pci_disable_device(pdev); out_ieee80211_free_hw: ieee80211_free_hw(il->hw); out: return err; } static void il3945_pci_remove(struct pci_dev *pdev) { struct il_priv *il = pci_get_drvdata(pdev); unsigned long flags; if (!il) return; D_INFO("*** UNLOAD DRIVER ***\n"); il_dbgfs_unregister(il); set_bit(S_EXIT_PENDING, &il->status); il_leds_exit(il); if (il->mac80211_registered) { ieee80211_unregister_hw(il->hw); il->mac80211_registered = 0; } else { il3945_down(il); } /* * Make sure device is reset to low power before unloading driver. * This may be redundant with il_down(), but there are paths to * run il_down() without calling apm_ops.stop(), and there are * paths to avoid running il_down() at all before leaving driver. * This (inexpensive) call *makes sure* device is reset. */ il_apm_stop(il); /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&il->lock, flags); il_disable_interrupts(il); spin_unlock_irqrestore(&il->lock, flags); il3945_synchronize_irq(il); sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group); cancel_delayed_work_sync(&il->_3945.rfkill_poll); il3945_dealloc_ucode_pci(il); if (il->rxq.bd) il3945_rx_queue_free(il, &il->rxq); il3945_hw_txq_ctx_free(il); il3945_unset_hw_params(il); /*netif_stop_queue(dev); */ flush_workqueue(il->workqueue); /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes * il->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(il->workqueue); il->workqueue = NULL; free_irq(pdev->irq, il); pci_disable_msi(pdev); iounmap(il->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); il_free_channel_map(il); il_free_geos(il); kfree(il->scan_cmd); if (il->beacon_skb) dev_kfree_skb(il->beacon_skb); ieee80211_free_hw(il->hw); } /***************************************************************************** * * driver and module entry point * *****************************************************************************/ static struct pci_driver il3945_driver = { .name = DRV_NAME, .id_table = il3945_hw_card_ids, .probe = il3945_pci_probe, .remove = il3945_pci_remove, .driver.pm = IL_LEGACY_PM_OPS, }; static int __init il3945_init(void) { int ret; pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); pr_info(DRV_COPYRIGHT "\n"); /* * Disabling hardware scan means that mac80211 will perform scans * "the hard way", rather than using device's scan. */ if (il3945_mod_params.disable_hw_scan) { pr_info("hw_scan is disabled\n"); il3945_mac_ops.hw_scan = NULL; } ret = il3945_rate_control_register(); if (ret) { pr_err("Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&il3945_driver); if (ret) { pr_err("Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: il3945_rate_control_unregister(); return ret; } static void __exit il3945_exit(void) { pci_unregister_driver(&il3945_driver); il3945_rate_control_unregister(); } MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX)); module_param_named(antenna, il3945_mod_params.antenna, int, 0444); MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])"); module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444); MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])"); module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int, 0444); MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)"); #ifdef CONFIG_IWLEGACY_DEBUG module_param_named(debug, il_debug_level, uint, 0644); MODULE_PARM_DESC(debug, "debug output mask"); #endif module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444); MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); module_exit(il3945_exit); module_init(il3945_init);