/****************************************************************************** * * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRV_NAME "iwlagn" #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-helpers.h" #include "iwl-sta.h" #include "iwl-calib.h" /****************************************************************************** * * module boiler plate * ******************************************************************************/ /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux" #ifdef CONFIG_IWLWIFI_DEBUG #define VD "d" #else #define VD #endif #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT #define VS "s" #else #define VS #endif #define DRV_VERSION IWLWIFI_VERSION VD VS MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); MODULE_ALIAS("iwl4965"); /*************** STATION TABLE MANAGEMENT **** * mac80211 should be examined to determine if sta_info is duplicating * the functionality provided here */ /**************************************************************/ /** * iwl_commit_rxon - commit staging_rxon to hardware * * The RXON command in staging_rxon is committed to the hardware and * the active_rxon structure is updated with the new data. This * function correctly transitions out of the RXON_ASSOC_MSK state if * a HW tune is required based on the RXON structure changes. */ int iwl_commit_rxon(struct iwl_priv *priv) { /* cast away the const for active_rxon in this function */ struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon; int ret; bool new_assoc = !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK); if (!iwl_is_alive(priv)) return -EBUSY; /* always get timestamp with Rx frame */ priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK; /* allow CTS-to-self if possible. this is relevant only for * 5000, but will not damage 4965 */ priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN; ret = iwl_check_rxon_cmd(priv); if (ret) { IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n"); return -EINVAL; } /* If we don't need to send a full RXON, we can use * iwl_rxon_assoc_cmd which is used to reconfigure filter * and other flags for the current radio configuration. */ if (!iwl_full_rxon_required(priv)) { ret = iwl_send_rxon_assoc(priv); if (ret) { IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret); return ret; } memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); return 0; } /* station table will be cleared */ priv->assoc_station_added = 0; /* If we are currently associated and the new config requires * an RXON_ASSOC and the new config wants the associated mask enabled, * we must clear the associated from the active configuration * before we apply the new config */ if (iwl_is_associated(priv) && new_assoc) { IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n"); active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; ret = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl_rxon_cmd), &priv->active_rxon); /* If the mask clearing failed then we set * active_rxon back to what it was previously */ if (ret) { active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK; IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret); return ret; } } IWL_DEBUG_INFO(priv, "Sending RXON\n" "* with%s RXON_FILTER_ASSOC_MSK\n" "* channel = %d\n" "* bssid = %pM\n", (new_assoc ? "" : "out"), le16_to_cpu(priv->staging_rxon.channel), priv->staging_rxon.bssid_addr); iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto); /* Apply the new configuration * RXON unassoc clears the station table in uCode, send it before * we add the bcast station. If assoc bit is set, we will send RXON * after having added the bcast and bssid station. */ if (!new_assoc) { ret = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl_rxon_cmd), &priv->staging_rxon); if (ret) { IWL_ERR(priv, "Error setting new RXON (%d)\n", ret); return ret; } memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); } priv->cfg->ops->smgmt->clear_station_table(priv); priv->start_calib = 0; /* Add the broadcast address so we can send broadcast frames */ if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) == IWL_INVALID_STATION) { IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n"); return -EIO; } /* If we have set the ASSOC_MSK and we are in BSS mode then * add the IWL_AP_ID to the station rate table */ if (new_assoc) { if (priv->iw_mode == NL80211_IFTYPE_STATION) { ret = iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1); if (ret == IWL_INVALID_STATION) { IWL_ERR(priv, "Error adding AP address for TX.\n"); return -EIO; } priv->assoc_station_added = 1; if (priv->default_wep_key && iwl_send_static_wepkey_cmd(priv, 0)) IWL_ERR(priv, "Could not send WEP static key.\n"); } /* Apply the new configuration * RXON assoc doesn't clear the station table in uCode, */ ret = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl_rxon_cmd), &priv->staging_rxon); if (ret) { IWL_ERR(priv, "Error setting new RXON (%d)\n", ret); return ret; } memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); } iwl_init_sensitivity(priv); /* If we issue a new RXON command which required a tune then we must * send a new TXPOWER command or we won't be able to Tx any frames */ ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true); if (ret) { IWL_ERR(priv, "Error sending TX power (%d)\n", ret); return ret; } return 0; } void iwl_update_chain_flags(struct iwl_priv *priv) { if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv); iwlcore_commit_rxon(priv); } static void iwl_clear_free_frames(struct iwl_priv *priv) { struct list_head *element; IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n", priv->frames_count); while (!list_empty(&priv->free_frames)) { element = priv->free_frames.next; list_del(element); kfree(list_entry(element, struct iwl_frame, list)); priv->frames_count--; } if (priv->frames_count) { IWL_WARN(priv, "%d frames still in use. Did we lose one?\n", priv->frames_count); priv->frames_count = 0; } } static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv) { struct iwl_frame *frame; struct list_head *element; if (list_empty(&priv->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IWL_ERR(priv, "Could not allocate frame!\n"); return NULL; } priv->frames_count++; return frame; } element = priv->free_frames.next; list_del(element); return list_entry(element, struct iwl_frame, list); } static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &priv->free_frames); } static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv, struct ieee80211_hdr *hdr, int left) { if (!iwl_is_associated(priv) || !priv->ibss_beacon || ((priv->iw_mode != NL80211_IFTYPE_ADHOC) && (priv->iw_mode != NL80211_IFTYPE_AP))) return 0; if (priv->ibss_beacon->len > left) return 0; memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len); return priv->ibss_beacon->len; } static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv, struct iwl_frame *frame, u8 rate) { struct iwl_tx_beacon_cmd *tx_beacon_cmd; unsigned int frame_size; tx_beacon_cmd = &frame->u.beacon; memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id; tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame, sizeof(frame->u) - sizeof(*tx_beacon_cmd)); BUG_ON(frame_size > MAX_MPDU_SIZE); tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size); if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP)) tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK); else tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, 0); tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK; return sizeof(*tx_beacon_cmd) + frame_size; } static int iwl_send_beacon_cmd(struct iwl_priv *priv) { struct iwl_frame *frame; unsigned int frame_size; int rc; u8 rate; frame = iwl_get_free_frame(priv); if (!frame) { IWL_ERR(priv, "Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } rate = iwl_rate_get_lowest_plcp(priv); frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate); rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, &frame->u.cmd[0]); iwl_free_frame(priv, frame); return rc; } static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx) { struct iwl_tfd_tb *tb = &tfd->tbs[idx]; dma_addr_t addr = get_unaligned_le32(&tb->lo); if (sizeof(dma_addr_t) > sizeof(u32)) addr |= ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16; return addr; } static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx) { struct iwl_tfd_tb *tb = &tfd->tbs[idx]; return le16_to_cpu(tb->hi_n_len) >> 4; } static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx, dma_addr_t addr, u16 len) { struct iwl_tfd_tb *tb = &tfd->tbs[idx]; u16 hi_n_len = len << 4; put_unaligned_le32(addr, &tb->lo); if (sizeof(dma_addr_t) > sizeof(u32)) hi_n_len |= ((addr >> 16) >> 16) & 0xF; tb->hi_n_len = cpu_to_le16(hi_n_len); tfd->num_tbs = idx + 1; } static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd) { return tfd->num_tbs & 0x1f; } /** * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] * @priv - driver private data * @txq - tx queue * * Does NOT advance any TFD circular buffer read/write indexes * Does NOT free the TFD itself (which is within circular buffer) */ void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq) { struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds; struct iwl_tfd *tfd; struct pci_dev *dev = priv->pci_dev; int index = txq->q.read_ptr; int i; int num_tbs; tfd = &tfd_tmp[index]; /* Sanity check on number of chunks */ num_tbs = iwl_tfd_get_num_tbs(tfd); if (num_tbs >= IWL_NUM_OF_TBS) { IWL_ERR(priv, "Too many chunks: %i\n", num_tbs); /* @todo issue fatal error, it is quite serious situation */ return; } /* Unmap tx_cmd */ if (num_tbs) pci_unmap_single(dev, pci_unmap_addr(&txq->cmd[index]->meta, mapping), pci_unmap_len(&txq->cmd[index]->meta, len), PCI_DMA_BIDIRECTIONAL); /* Unmap chunks, if any. */ for (i = 1; i < num_tbs; i++) { pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i), iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE); if (txq->txb) { dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]); txq->txb[txq->q.read_ptr].skb[i - 1] = NULL; } } } int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq, dma_addr_t addr, u16 len, u8 reset, u8 pad) { struct iwl_queue *q; struct iwl_tfd *tfd, *tfd_tmp; u32 num_tbs; q = &txq->q; tfd_tmp = (struct iwl_tfd *)txq->tfds; tfd = &tfd_tmp[q->write_ptr]; if (reset) memset(tfd, 0, sizeof(*tfd)); num_tbs = iwl_tfd_get_num_tbs(tfd); /* Each TFD can point to a maximum 20 Tx buffers */ if (num_tbs >= IWL_NUM_OF_TBS) { IWL_ERR(priv, "Error can not send more than %d chunks\n", IWL_NUM_OF_TBS); return -EINVAL; } BUG_ON(addr & ~DMA_BIT_MASK(36)); if (unlikely(addr & ~IWL_TX_DMA_MASK)) IWL_ERR(priv, "Unaligned address = %llx\n", (unsigned long long)addr); iwl_tfd_set_tb(tfd, num_tbs, addr, len); return 0; } /* * Tell nic where to find circular buffer of Tx Frame Descriptors for * given Tx queue, and enable the DMA channel used for that queue. * * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA * channels supported in hardware. */ int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq) { int ret; unsigned long flags; int txq_id = txq->q.id; spin_lock_irqsave(&priv->lock, flags); ret = iwl_grab_nic_access(priv); if (ret) { spin_unlock_irqrestore(&priv->lock, flags); return ret; } /* Circular buffer (TFD queue in DRAM) physical base address */ iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->lock, flags); return 0; } /****************************************************************************** * * Misc. internal state and helper functions * ******************************************************************************/ #define MAX_UCODE_BEACON_INTERVAL 4096 static u16 iwl_adjust_beacon_interval(u16 beacon_val) { u16 new_val = 0; u16 beacon_factor = 0; beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL) / MAX_UCODE_BEACON_INTERVAL; new_val = beacon_val / beacon_factor; if (!new_val) new_val = MAX_UCODE_BEACON_INTERVAL; return new_val; } static void iwl_setup_rxon_timing(struct iwl_priv *priv) { u64 tsf; s32 interval_tm, rem; unsigned long flags; struct ieee80211_conf *conf = NULL; u16 beacon_int = 0; conf = ieee80211_get_hw_conf(priv->hw); spin_lock_irqsave(&priv->lock, flags); priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp); priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval); if (priv->iw_mode == NL80211_IFTYPE_STATION) { beacon_int = iwl_adjust_beacon_interval(priv->beacon_int); priv->rxon_timing.atim_window = 0; } else { beacon_int = iwl_adjust_beacon_interval( priv->vif->bss_conf.beacon_int); /* TODO: we need to get atim_window from upper stack * for now we set to 0 */ priv->rxon_timing.atim_window = 0; } priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int); tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */ interval_tm = beacon_int * 1024; rem = do_div(tsf, interval_tm); priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem); spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n", le16_to_cpu(priv->rxon_timing.beacon_interval), le32_to_cpu(priv->rxon_timing.beacon_init_val), le16_to_cpu(priv->rxon_timing.atim_window)); } /****************************************************************************** * * Generic RX handler implementations * ******************************************************************************/ static void iwl_rx_reply_alive(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", palive->is_valid, palive->ver_type, palive->ver_subtype); if (palive->ver_subtype == INITIALIZE_SUBTYPE) { IWL_DEBUG_INFO(priv, "Initialization Alive received.\n"); memcpy(&priv->card_alive_init, &pkt->u.alive_frame, sizeof(struct iwl_init_alive_resp)); pwork = &priv->init_alive_start; } else { IWL_DEBUG_INFO(priv, "Runtime Alive received.\n"); memcpy(&priv->card_alive, &pkt->u.alive_frame, sizeof(struct iwl_alive_resp)); pwork = &priv->alive_start; } /* We delay the ALIVE response by 5ms to * give the HW RF Kill time to activate... */ if (palive->is_valid == UCODE_VALID_OK) queue_delayed_work(priv->workqueue, pwork, msecs_to_jiffies(5)); else IWL_WARN(priv, "uCode did not respond OK.\n"); } static void iwl_bg_beacon_update(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, beacon_update); struct sk_buff *beacon; /* Pull updated AP beacon from mac80211. will fail if not in AP mode */ beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (!beacon) { IWL_ERR(priv, "update beacon failed\n"); return; } mutex_lock(&priv->mutex); /* new beacon skb is allocated every time; dispose previous.*/ if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = beacon; mutex_unlock(&priv->mutex); iwl_send_beacon_cmd(priv); } /** * iwl_bg_statistics_periodic - Timer callback to queue statistics * * This callback is provided in order to send a statistics request. * * This timer function is continually reset to execute within * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION * was received. We need to ensure we receive the statistics in order * to update the temperature used for calibrating the TXPOWER. */ static void iwl_bg_statistics_periodic(unsigned long data) { struct iwl_priv *priv = (struct iwl_priv *)data; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* dont send host command if rf-kill is on */ if (!iwl_is_ready_rf(priv)) return; iwl_send_statistics_request(priv, CMD_ASYNC); } static void iwl_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl4965_beacon_notif *beacon = (struct iwl4965_beacon_notif *)pkt->u.raw; u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d " "tsf %d %d rate %d\n", le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le32_to_cpu(beacon->ibss_mgr_status), le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); #endif if ((priv->iw_mode == NL80211_IFTYPE_AP) && (!test_bit(STATUS_EXIT_PENDING, &priv->status))) queue_work(priv->workqueue, &priv->beacon_update); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void iwl_rx_card_state_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = priv->status; IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On"); if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | RF_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (!iwl_grab_nic_access(priv)) { iwl_write_direct32( priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); iwl_release_nic_access(priv); } if (!(flags & RXON_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (!iwl_grab_nic_access(priv)) { iwl_write_direct32( priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); iwl_release_nic_access(priv); } } if (flags & RF_CARD_DISABLED) { iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); iwl_read32(priv, CSR_UCODE_DRV_GP1); if (!iwl_grab_nic_access(priv)) iwl_release_nic_access(priv); } } if (flags & HW_CARD_DISABLED) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); if (flags & SW_CARD_DISABLED) set_bit(STATUS_RF_KILL_SW, &priv->status); else clear_bit(STATUS_RF_KILL_SW, &priv->status); if (!(flags & RXON_CARD_DISABLED)) iwl_scan_cancel(priv); if ((test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status)) || (test_bit(STATUS_RF_KILL_SW, &status) != test_bit(STATUS_RF_KILL_SW, &priv->status))) queue_work(priv->workqueue, &priv->rf_kill); else wake_up_interruptible(&priv->wait_command_queue); } int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src) { int ret; unsigned long flags; spin_lock_irqsave(&priv->lock, flags); ret = iwl_grab_nic_access(priv); if (ret) goto err; if (src == IWL_PWR_SRC_VAUX) { if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VAUX, ~APMG_PS_CTRL_MSK_PWR_SRC); } else { iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, ~APMG_PS_CTRL_MSK_PWR_SRC); } iwl_release_nic_access(priv); err: spin_unlock_irqrestore(&priv->lock, flags); return ret; } /** * iwl_setup_rx_handlers - Initialize Rx handler callbacks * * Setup the RX handlers for each of the reply types sent from the uCode * to the host. * * This function chains into the hardware specific files for them to setup * any hardware specific handlers as well. */ static void iwl_setup_rx_handlers(struct iwl_priv *priv) { priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive; priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error; priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa; priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif; priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_rx_pm_debug_statistics_notif; priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif; /* * The same handler is used for both the REPLY to a discrete * statistics request from the host as well as for the periodic * statistics notifications (after received beacons) from the uCode. */ priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics; iwl_setup_spectrum_handlers(priv); iwl_setup_rx_scan_handlers(priv); /* status change handler */ priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif; priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] = iwl_rx_missed_beacon_notif; /* Rx handlers */ priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy; priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx; /* block ack */ priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba; /* Set up hardware specific Rx handlers */ priv->cfg->ops->lib->rx_handler_setup(priv); } /** * iwl_rx_handle - Main entry function for receiving responses from uCode * * Uses the priv->rx_handlers callback function array to invoke * the appropriate handlers, including command responses, * frame-received notifications, and other notifications. */ void iwl_rx_handle(struct iwl_priv *priv) { struct iwl_rx_mem_buffer *rxb; struct iwl_rx_packet *pkt; struct iwl_rx_queue *rxq = &priv->rxq; u32 r, i; int reclaim; unsigned long flags; u8 fill_rx = 0; u32 count = 8; /* uCode's read index (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; i = rxq->read; /* Rx interrupt, but nothing sent from uCode */ if (i == r) IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i); if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2)) fill_rx = 1; while (i != r) { rxb = rxq->queue[i]; /* If an RXB doesn't have a Rx queue slot associated with it, * then a bug has been introduced in the queue refilling * routines -- catch it here */ BUG_ON(rxb == NULL); rxq->queue[i] = NULL; pci_unmap_single(priv->pci_dev, rxb->real_dma_addr, priv->hw_params.rx_buf_size + 256, PCI_DMA_FROMDEVICE); pkt = (struct iwl_rx_packet *)rxb->skb->data; /* Reclaim a command buffer only if this packet is a response * to a (driver-originated) command. * If the packet (e.g. Rx frame) originated from uCode, * there is no command buffer to reclaim. * Ucode should set SEQ_RX_FRAME bit if ucode-originated, * but apparently a few don't get set; catch them here. */ reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) && (pkt->hdr.cmd != REPLY_RX_PHY_CMD) && (pkt->hdr.cmd != REPLY_RX) && (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) && (pkt->hdr.cmd != REPLY_COMPRESSED_BA) && (pkt->hdr.cmd != STATISTICS_NOTIFICATION) && (pkt->hdr.cmd != REPLY_TX); /* Based on type of command response or notification, * handle those that need handling via function in * rx_handlers table. See iwl_setup_rx_handlers() */ if (priv->rx_handlers[pkt->hdr.cmd]) { IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); priv->isr_stats.rx_handlers[pkt->hdr.cmd]++; } else { /* No handling needed */ IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); } if (reclaim) { /* Invoke any callbacks, transfer the skb to caller, and * fire off the (possibly) blocking iwl_send_cmd() * as we reclaim the driver command queue */ if (rxb && rxb->skb) iwl_tx_cmd_complete(priv, rxb); else IWL_WARN(priv, "Claim null rxb?\n"); } /* For now we just don't re-use anything. We can tweak this * later to try and re-use notification packets and SKBs that * fail to Rx correctly */ if (rxb->skb != NULL) { priv->alloc_rxb_skb--; dev_kfree_skb_any(rxb->skb); rxb->skb = NULL; } spin_lock_irqsave(&rxq->lock, flags); list_add_tail(&rxb->list, &priv->rxq.rx_used); spin_unlock_irqrestore(&rxq->lock, flags); i = (i + 1) & RX_QUEUE_MASK; /* If there are a lot of unused frames, * restock the Rx queue so ucode wont assert. */ if (fill_rx) { count++; if (count >= 8) { priv->rxq.read = i; iwl_rx_queue_restock(priv); count = 0; } } } /* Backtrack one entry */ priv->rxq.read = i; iwl_rx_queue_restock(priv); } /* call this function to flush any scheduled tasklet */ static inline void iwl_synchronize_irq(struct iwl_priv *priv) { /* wait to make sure we flush pending tasklet*/ synchronize_irq(priv->pci_dev->irq); tasklet_kill(&priv->irq_tasklet); } static void iwl_irq_tasklet(struct iwl_priv *priv) { u32 inta, handled = 0; u32 inta_fh; unsigned long flags; #ifdef CONFIG_IWLWIFI_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&priv->lock, flags); /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, * and will clear only when CSR_FH_INT_STATUS gets cleared. */ inta = iwl_read32(priv, CSR_INT); iwl_write32(priv, CSR_INT, inta); /* Ack/clear/reset pending flow-handler (DMA) interrupts. * Any new interrupts that happen after this, either while we're * in this tasklet, or later, will show up in next ISR/tasklet. */ inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not * atomic, make sure that inta covers all the interrupts that * we've discovered, even if FH interrupt came in just after * reading CSR_INT. */ if (inta_fh & CSR49_FH_INT_RX_MASK) inta |= CSR_INT_BIT_FH_RX; if (inta_fh & CSR49_FH_INT_TX_MASK) inta |= CSR_INT_BIT_FH_TX; /* Now service all interrupt bits discovered above. */ if (inta & CSR_INT_BIT_HW_ERR) { IWL_ERR(priv, "Microcode HW error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl_disable_interrupts(priv); priv->isr_stats.hw++; iwl_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; spin_unlock_irqrestore(&priv->lock, flags); return; } #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { IWL_DEBUG_ISR(priv, "Scheduler finished to transmit " "the frame/frames.\n"); priv->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { IWL_DEBUG_ISR(priv, "Alive interrupt\n"); priv->isr_stats.alive++; } } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* HW RF KILL switch toggled */ if (inta & CSR_INT_BIT_RF_KILL) { int hw_rf_kill = 0; if (!(iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) hw_rf_kill = 1; IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n", hw_rf_kill ? "disable radio" : "enable radio"); priv->isr_stats.rfkill++; /* driver only loads ucode once setting the interface up. * the driver allows loading the ucode even if the radio * is killed. Hence update the killswitch state here. The * rfkill handler will care about restarting if needed. */ if (!test_bit(STATUS_ALIVE, &priv->status)) { if (hw_rf_kill) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); queue_work(priv->workqueue, &priv->rf_kill); } handled |= CSR_INT_BIT_RF_KILL; } /* Chip got too hot and stopped itself */ if (inta & CSR_INT_BIT_CT_KILL) { IWL_ERR(priv, "Microcode CT kill error detected.\n"); priv->isr_stats.ctkill++; handled |= CSR_INT_BIT_CT_KILL; } /* Error detected by uCode */ if (inta & CSR_INT_BIT_SW_ERR) { IWL_ERR(priv, "Microcode SW error detected. " " Restarting 0x%X.\n", inta); priv->isr_stats.sw++; priv->isr_stats.sw_err = inta; iwl_irq_handle_error(priv); handled |= CSR_INT_BIT_SW_ERR; } /* uCode wakes up after power-down sleep */ if (inta & CSR_INT_BIT_WAKEUP) { IWL_DEBUG_ISR(priv, "Wakeup interrupt\n"); iwl_rx_queue_update_write_ptr(priv, &priv->rxq); iwl_txq_update_write_ptr(priv, &priv->txq[0]); iwl_txq_update_write_ptr(priv, &priv->txq[1]); iwl_txq_update_write_ptr(priv, &priv->txq[2]); iwl_txq_update_write_ptr(priv, &priv->txq[3]); iwl_txq_update_write_ptr(priv, &priv->txq[4]); iwl_txq_update_write_ptr(priv, &priv->txq[5]); priv->isr_stats.wakeup++; handled |= CSR_INT_BIT_WAKEUP; } /* All uCode command responses, including Tx command responses, * Rx "responses" (frame-received notification), and other * notifications from uCode come through here*/ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { iwl_rx_handle(priv); priv->isr_stats.rx++; handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } if (inta & CSR_INT_BIT_FH_TX) { IWL_DEBUG_ISR(priv, "Tx interrupt\n"); priv->isr_stats.tx++; handled |= CSR_INT_BIT_FH_TX; /* FH finished to write, send event */ priv->ucode_write_complete = 1; wake_up_interruptible(&priv->wait_command_queue); } if (inta & ~handled) { IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled); priv->isr_stats.unhandled++; } if (inta & ~CSR_INI_SET_MASK) { IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", inta & ~CSR_INI_SET_MASK); IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if diabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl_enable_interrupts(priv); #ifdef CONFIG_IWLWIFI_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { inta = iwl_read32(priv, CSR_INT); inta_mask = iwl_read32(priv, CSR_INT_MASK); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif spin_unlock_irqrestore(&priv->lock, flags); } /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void iwl_dealloc_ucode_pci(struct iwl_priv *priv) { iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot); } static void iwl_nic_start(struct iwl_priv *priv) { /* Remove all resets to allow NIC to operate */ iwl_write32(priv, CSR_RESET, 0); } /** * iwl_read_ucode - Read uCode images from disk file. * * Copy into buffers for card to fetch via bus-mastering */ static int iwl_read_ucode(struct iwl_priv *priv) { struct iwl_ucode *ucode; int ret = -EINVAL, index; const struct firmware *ucode_raw; const char *name_pre = priv->cfg->fw_name_pre; const unsigned int api_max = priv->cfg->ucode_api_max; const unsigned int api_min = priv->cfg->ucode_api_min; char buf[25]; u8 *src; size_t len; u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size; /* Ask kernel firmware_class module to get the boot firmware off disk. * request_firmware() is synchronous, file is in memory on return. */ for (index = api_max; index >= api_min; index--) { sprintf(buf, "%s%d%s", name_pre, index, ".ucode"); ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev); if (ret < 0) { IWL_ERR(priv, "%s firmware file req failed: %d\n", buf, ret); if (ret == -ENOENT) continue; else goto error; } else { if (index < api_max) IWL_ERR(priv, "Loaded firmware %s, " "which is deprecated. " "Please use API v%u instead.\n", buf, api_max); IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n", buf, ucode_raw->size); break; } } if (ret < 0) goto error; /* Make sure that we got at least our header! */ if (ucode_raw->size < sizeof(*ucode)) { IWL_ERR(priv, "File size way too small!\n"); ret = -EINVAL; goto err_release; } /* Data from ucode file: header followed by uCode images */ ucode = (void *)ucode_raw->data; priv->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IWL_UCODE_API(priv->ucode_ver); inst_size = le32_to_cpu(ucode->inst_size); data_size = le32_to_cpu(ucode->data_size); init_size = le32_to_cpu(ucode->init_size); init_data_size = le32_to_cpu(ucode->init_data_size); boot_size = le32_to_cpu(ucode->boot_size); /* api_ver should match the api version forming part of the * firmware filename ... but we don't check for that and only rely * on the API version read from firmware header from here on forward */ if (api_ver < api_min || api_ver > api_max) { IWL_ERR(priv, "Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); priv->ucode_ver = 0; ret = -EINVAL; goto err_release; } if (api_ver != api_max) IWL_ERR(priv, "Firmware has old API version. Expected v%u, " "got v%u. New firmware can be obtained " "from http://www.intellinuxwireless.org.\n", api_max, api_ver); IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver)); IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n", priv->ucode_ver); IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n", inst_size); IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n", data_size); IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n", init_size); IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n", init_data_size); IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n", boot_size); /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size < sizeof(*ucode) + inst_size + data_size + init_size + init_data_size + boot_size) { IWL_DEBUG_INFO(priv, "uCode file size %d too small\n", (int)ucode_raw->size); ret = -EINVAL; goto err_release; } /* Verify that uCode images will fit in card's SRAM */ if (inst_size > priv->hw_params.max_inst_size) { IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n", inst_size); ret = -EINVAL; goto err_release; } if (data_size > priv->hw_params.max_data_size) { IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n", data_size); ret = -EINVAL; goto err_release; } if (init_size > priv->hw_params.max_inst_size) { IWL_INFO(priv, "uCode init instr len %d too large to fit in\n", init_size); ret = -EINVAL; goto err_release; } if (init_data_size > priv->hw_params.max_data_size) { IWL_INFO(priv, "uCode init data len %d too large to fit in\n", init_data_size); ret = -EINVAL; goto err_release; } if (boot_size > priv->hw_params.max_bsm_size) { IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n", boot_size); ret = -EINVAL; goto err_release; } /* Allocate ucode buffers for card's bus-master loading ... */ /* Runtime instructions and 2 copies of data: * 1) unmodified from disk * 2) backup cache for save/restore during power-downs */ priv->ucode_code.len = inst_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code); priv->ucode_data.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data); priv->ucode_data_backup.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup); if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr || !priv->ucode_data_backup.v_addr) goto err_pci_alloc; /* Initialization instructions and data */ if (init_size && init_data_size) { priv->ucode_init.len = init_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init); priv->ucode_init_data.len = init_data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data); if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr) goto err_pci_alloc; } /* Bootstrap (instructions only, no data) */ if (boot_size) { priv->ucode_boot.len = boot_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot); if (!priv->ucode_boot.v_addr) goto err_pci_alloc; } /* Copy images into buffers for card's bus-master reads ... */ /* Runtime instructions (first block of data in file) */ src = &ucode->data[0]; len = priv->ucode_code.len; IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len); memcpy(priv->ucode_code.v_addr, src, len); IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr); /* Runtime data (2nd block) * NOTE: Copy into backup buffer will be done in iwl_up() */ src = &ucode->data[inst_size]; len = priv->ucode_data.len; IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len); memcpy(priv->ucode_data.v_addr, src, len); memcpy(priv->ucode_data_backup.v_addr, src, len); /* Initialization instructions (3rd block) */ if (init_size) { src = &ucode->data[inst_size + data_size]; len = priv->ucode_init.len; IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n", len); memcpy(priv->ucode_init.v_addr, src, len); } /* Initialization data (4th block) */ if (init_data_size) { src = &ucode->data[inst_size + data_size + init_size]; len = priv->ucode_init_data.len; IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n", len); memcpy(priv->ucode_init_data.v_addr, src, len); } /* Bootstrap instructions (5th block) */ src = &ucode->data[inst_size + data_size + init_size + init_data_size]; len = priv->ucode_boot.len; IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len); memcpy(priv->ucode_boot.v_addr, src, len); /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); return 0; err_pci_alloc: IWL_ERR(priv, "failed to allocate pci memory\n"); ret = -ENOMEM; iwl_dealloc_ucode_pci(priv); err_release: release_firmware(ucode_raw); error: return ret; } /** * iwl_alive_start - called after REPLY_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by iwl_init_alive_start()). */ static void iwl_alive_start(struct iwl_priv *priv) { int ret = 0; IWL_DEBUG_INFO(priv, "Runtime Alive received.\n"); if (priv->card_alive.is_valid != UCODE_VALID_OK) { /* We had an error bringing up the hardware, so take it * all the way back down so we can try again */ IWL_DEBUG_INFO(priv, "Alive failed.\n"); goto restart; } /* Initialize uCode has loaded Runtime uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "runtime" alive if code weren't properly loaded. */ if (iwl_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n"); goto restart; } priv->cfg->ops->smgmt->clear_station_table(priv); ret = priv->cfg->ops->lib->alive_notify(priv); if (ret) { IWL_WARN(priv, "Could not complete ALIVE transition [ntf]: %d\n", ret); goto restart; } /* After the ALIVE response, we can send host commands to the uCode */ set_bit(STATUS_ALIVE, &priv->status); if (iwl_is_rfkill(priv)) return; ieee80211_wake_queues(priv->hw); priv->active_rate = priv->rates_mask; priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; if (iwl_is_associated(priv)) { struct iwl_rxon_cmd *active_rxon = (struct iwl_rxon_cmd *)&priv->active_rxon; /* apply any changes in staging */ priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ iwl_connection_init_rx_config(priv, priv->iw_mode); if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv); memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN); } /* Configure Bluetooth device coexistence support */ iwl_send_bt_config(priv); iwl_reset_run_time_calib(priv); /* Configure the adapter for unassociated operation */ iwlcore_commit_rxon(priv); /* At this point, the NIC is initialized and operational */ iwl_rf_kill_ct_config(priv); iwl_leds_register(priv); IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n"); set_bit(STATUS_READY, &priv->status); wake_up_interruptible(&priv->wait_command_queue); iwl_power_update_mode(priv, 1); /* reassociate for ADHOC mode */ if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) { struct sk_buff *beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (beacon) iwl_mac_beacon_update(priv->hw, beacon); } if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status)) iwl_set_mode(priv, priv->iw_mode); return; restart: queue_work(priv->workqueue, &priv->restart); } static void iwl_cancel_deferred_work(struct iwl_priv *priv); static void __iwl_down(struct iwl_priv *priv) { unsigned long flags; int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status); IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n"); if (!exit_pending) set_bit(STATUS_EXIT_PENDING, &priv->status); iwl_leds_unregister(priv); priv->cfg->ops->smgmt->clear_station_table(priv); /* Unblock any waiting calls */ wake_up_interruptible_all(&priv->wait_command_queue); /* Wipe out the EXIT_PENDING status bit if we are not actually * exiting the module */ if (!exit_pending) clear_bit(STATUS_EXIT_PENDING, &priv->status); /* stop and reset the on-board processor */ iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); /* If we have not previously called iwl_init() then * clear all bits but the RF Kill bits and return */ if (!iwl_is_init(priv)) { priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill * bits and continue taking the NIC down. */ priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_FW_ERROR, &priv->status) << STATUS_FW_ERROR | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; spin_lock_irqsave(&priv->lock, flags); iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); spin_unlock_irqrestore(&priv->lock, flags); iwl_txq_ctx_stop(priv); iwl_rxq_stop(priv); spin_lock_irqsave(&priv->lock, flags); if (!iwl_grab_nic_access(priv)) { iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); iwl_release_nic_access(priv); } spin_unlock_irqrestore(&priv->lock, flags); udelay(5); /* FIXME: apm_ops.suspend(priv) */ if (exit_pending) priv->cfg->ops->lib->apm_ops.stop(priv); else priv->cfg->ops->lib->apm_ops.reset(priv); exit: memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp)); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; /* clear out any free frames */ iwl_clear_free_frames(priv); } static void iwl_down(struct iwl_priv *priv) { mutex_lock(&priv->mutex); __iwl_down(priv); mutex_unlock(&priv->mutex); iwl_cancel_deferred_work(priv); } #define MAX_HW_RESTARTS 5 static int __iwl_up(struct iwl_priv *priv) { int i; int ret; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); return -EIO; } if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) { IWL_ERR(priv, "ucode not available for device bringup\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else set_bit(STATUS_RF_KILL_HW, &priv->status); if (iwl_is_rfkill(priv)) { iwl_enable_interrupts(priv); IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n", test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW"); return 0; } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); ret = iwl_hw_nic_init(priv); if (ret) { IWL_ERR(priv, "Unable to init nic\n"); return ret; } /* make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ iwl_write32(priv, CSR_INT, 0xFFFFFFFF); iwl_enable_interrupts(priv); /* really make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); /* Copy original ucode data image from disk into backup cache. * This will be used to initialize the on-board processor's * data SRAM for a clean start when the runtime program first loads. */ memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr, priv->ucode_data.len); for (i = 0; i < MAX_HW_RESTARTS; i++) { priv->cfg->ops->smgmt->clear_station_table(priv); /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ ret = priv->cfg->ops->lib->load_ucode(priv); if (ret) { IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n", ret); continue; } /* start card; "initialize" will load runtime ucode */ iwl_nic_start(priv); IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n"); return 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); __iwl_down(priv); clear_bit(STATUS_EXIT_PENDING, &priv->status); /* tried to restart and config the device for as long as our * patience could withstand */ IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void iwl_bg_init_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, init_alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); priv->cfg->ops->lib->init_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl_bg_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl_bg_run_time_calib_work(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, run_time_calib_work); mutex_lock(&priv->mutex); if (test_bit(STATUS_EXIT_PENDING, &priv->status) || test_bit(STATUS_SCANNING, &priv->status)) { mutex_unlock(&priv->mutex); return; } if (priv->start_calib) { iwl_chain_noise_calibration(priv, &priv->statistics); iwl_sensitivity_calibration(priv, &priv->statistics); } mutex_unlock(&priv->mutex); return; } static void iwl_bg_up(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, up); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); __iwl_up(priv); mutex_unlock(&priv->mutex); iwl_rfkill_set_hw_state(priv); } static void iwl_bg_restart(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, restart); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) { mutex_lock(&priv->mutex); priv->vif = NULL; priv->is_open = 0; mutex_unlock(&priv->mutex); iwl_down(priv); ieee80211_restart_hw(priv->hw); } else { iwl_down(priv); queue_work(priv->workqueue, &priv->up); } } static void iwl_bg_rx_replenish(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rx_replenish); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl_rx_replenish(priv); mutex_unlock(&priv->mutex); } #define IWL_DELAY_NEXT_SCAN (HZ*2) void iwl_post_associate(struct iwl_priv *priv) { struct ieee80211_conf *conf = NULL; int ret = 0; unsigned long flags; if (priv->iw_mode == NL80211_IFTYPE_AP) { IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__); return; } IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n", priv->assoc_id, priv->active_rxon.bssid_addr); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!priv->vif || !priv->is_open) return; iwl_scan_cancel_timeout(priv, 200); conf = ieee80211_get_hw_conf(priv->hw); priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); iwl_setup_rxon_timing(priv); ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (ret) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwl_set_rxon_ht(priv, &priv->current_ht_config); if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv); priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n", priv->assoc_id, priv->beacon_int); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } iwlcore_commit_rxon(priv); switch (priv->iw_mode) { case NL80211_IFTYPE_STATION: break; case NL80211_IFTYPE_ADHOC: /* assume default assoc id */ priv->assoc_id = 1; iwl_rxon_add_station(priv, priv->bssid, 0); iwl_send_beacon_cmd(priv); break; default: IWL_ERR(priv, "%s Should not be called in %d mode\n", __func__, priv->iw_mode); break; } if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->assoc_station_added = 1; spin_lock_irqsave(&priv->lock, flags); iwl_activate_qos(priv, 0); spin_unlock_irqrestore(&priv->lock, flags); /* the chain noise calibration will enabled PM upon completion * If chain noise has already been run, then we need to enable * power management here */ if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE) iwl_power_update_mode(priv, 0); /* Enable Rx differential gain and sensitivity calibrations */ iwl_chain_noise_reset(priv); priv->start_calib = 1; } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (4 * HZ) static int iwl_mac_start(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; int ret; IWL_DEBUG_MAC80211(priv, "enter\n"); /* we should be verifying the device is ready to be opened */ mutex_lock(&priv->mutex); memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd)); /* fetch ucode file from disk, alloc and copy to bus-master buffers ... * ucode filename and max sizes are card-specific. */ if (!priv->ucode_code.len) { ret = iwl_read_ucode(priv); if (ret) { IWL_ERR(priv, "Could not read microcode: %d\n", ret); mutex_unlock(&priv->mutex); return ret; } } ret = __iwl_up(priv); mutex_unlock(&priv->mutex); iwl_rfkill_set_hw_state(priv); if (ret) return ret; if (iwl_is_rfkill(priv)) goto out; IWL_DEBUG_INFO(priv, "Start UP work done.\n"); /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from * mac80211 will not be run successfully. */ ret = wait_event_interruptible_timeout(priv->wait_command_queue, test_bit(STATUS_READY, &priv->status), UCODE_READY_TIMEOUT); if (!ret) { if (!test_bit(STATUS_READY, &priv->status)) { IWL_ERR(priv, "START_ALIVE timeout after %dms.\n", jiffies_to_msecs(UCODE_READY_TIMEOUT)); return -ETIMEDOUT; } } out: priv->is_open = 1; IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; } static void iwl_mac_stop(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); if (!priv->is_open) return; priv->is_open = 0; if (iwl_is_ready_rf(priv)) { /* stop mac, cancel any scan request and clear * RXON_FILTER_ASSOC_MSK BIT */ mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); } iwl_down(priv); flush_workqueue(priv->workqueue); /* enable interrupts again in order to receive rfkill changes */ iwl_write32(priv, CSR_INT, 0xFFFFFFFF); iwl_enable_interrupts(priv); IWL_DEBUG_MAC80211(priv, "leave\n"); } static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MACDUMP(priv, "enter\n"); IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (iwl_tx_skb(priv, skb)) dev_kfree_skb_any(skb); IWL_DEBUG_MACDUMP(priv, "leave\n"); return NETDEV_TX_OK; } void iwl_config_ap(struct iwl_priv *priv) { int ret = 0; unsigned long flags; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* The following should be done only at AP bring up */ if (!iwl_is_associated(priv)) { /* RXON - unassoc (to set timing command) */ priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); /* RXON Timing */ iwl_setup_rxon_timing(priv); ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (ret) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv); /* FIXME: what should be the assoc_id for AP? */ priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); spin_lock_irqsave(&priv->lock, flags); iwl_activate_qos(priv, 1); spin_unlock_irqrestore(&priv->lock, flags); iwl_rxon_add_station(priv, iwl_bcast_addr, 0); } iwl_send_beacon_cmd(priv); /* FIXME - we need to add code here to detect a totally new * configuration, reset the AP, unassoc, rxon timing, assoc, * clear sta table, add BCAST sta... */ } static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_key_conf *keyconf, const u8 *addr, u32 iv32, u16 *phase1key) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key); IWL_DEBUG_MAC80211(priv, "leave\n"); } static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct iwl_priv *priv = hw->priv; const u8 *addr; int ret; u8 sta_id; bool is_default_wep_key = false; IWL_DEBUG_MAC80211(priv, "enter\n"); if (priv->hw_params.sw_crypto) { IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } addr = sta ? sta->addr : iwl_bcast_addr; sta_id = priv->cfg->ops->smgmt->find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n", addr); return -EINVAL; } mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); /* If we are getting WEP group key and we didn't receive any key mapping * so far, we are in legacy wep mode (group key only), otherwise we are * in 1X mode. * In legacy wep mode, we use another host command to the uCode */ if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id && priv->iw_mode != NL80211_IFTYPE_AP) { if (cmd == SET_KEY) is_default_wep_key = !priv->key_mapping_key; else is_default_wep_key = (key->hw_key_idx == HW_KEY_DEFAULT); } switch (cmd) { case SET_KEY: if (is_default_wep_key) ret = iwl_set_default_wep_key(priv, key); else ret = iwl_set_dynamic_key(priv, key, sta_id); IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); break; case DISABLE_KEY: if (is_default_wep_key) ret = iwl_remove_default_wep_key(priv, key); else ret = iwl_remove_dynamic_key(priv, key, sta_id); IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); break; default: ret = -EINVAL; } IWL_DEBUG_MAC80211(priv, "leave\n"); return ret; } static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, enum ieee80211_ampdu_mlme_action action, struct ieee80211_sta *sta, u16 tid, u16 *ssn) { struct iwl_priv *priv = hw->priv; int ret; IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", sta->addr, tid); if (!(priv->cfg->sku & IWL_SKU_N)) return -EACCES; switch (action) { case IEEE80211_AMPDU_RX_START: IWL_DEBUG_HT(priv, "start Rx\n"); return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn); case IEEE80211_AMPDU_RX_STOP: IWL_DEBUG_HT(priv, "stop Rx\n"); ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return 0; else return ret; case IEEE80211_AMPDU_TX_START: IWL_DEBUG_HT(priv, "start Tx\n"); return iwl_tx_agg_start(priv, sta->addr, tid, ssn); case IEEE80211_AMPDU_TX_STOP: IWL_DEBUG_HT(priv, "stop Tx\n"); ret = iwl_tx_agg_stop(priv, sta->addr, tid); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return 0; else return ret; default: IWL_DEBUG_HT(priv, "unknown\n"); return -EINVAL; break; } return 0; } static int iwl_mac_get_stats(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats) { struct iwl_priv *priv = hw->priv; priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLWIFI_DEBUG /* * The following adds a new attribute to the sysfs representation * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) * used for controlling the debug level. * * See the level definitions in iwl for details. */ static ssize_t show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "0x%08X\n", priv->debug_level); } static ssize_t store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; int ret; ret = strict_strtoul(buf, 0, &val); if (ret) IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf); else priv->debug_level = val; return strnlen(buf, count); } static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, show_debug_level, store_debug_level); #endif /* CONFIG_IWLWIFI_DEBUG */ static ssize_t show_version(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); struct iwl_alive_resp *palive = &priv->card_alive; ssize_t pos = 0; u16 eeprom_ver; if (palive->is_valid) pos += sprintf(buf + pos, "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n" "fw type: 0x%01X 0x%01X\n", palive->ucode_major, palive->ucode_minor, palive->sw_rev[0], palive->sw_rev[1], palive->ver_type, palive->ver_subtype); else pos += sprintf(buf + pos, "fw not loaded\n"); if (priv->eeprom) { eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION); pos += sprintf(buf + pos, "EEPROM version: 0x%x\n", eeprom_ver); } else { pos += sprintf(buf + pos, "EEPROM not initialzed\n"); } return pos; } static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL); static ssize_t show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", priv->temperature); } static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL); static ssize_t show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_ready_rf(priv)) return sprintf(buf, "off\n"); else return sprintf(buf, "%d\n", priv->tx_power_user_lmt); } static ssize_t store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; int ret; ret = strict_strtoul(buf, 10, &val); if (ret) IWL_INFO(priv, "%s is not in decimal form.\n", buf); else iwl_set_tx_power(priv, val, false); return count; } static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power); static ssize_t show_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "0x%04X\n", priv->active_rxon.flags); } static ssize_t store_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; u32 flags; int ret = strict_strtoul(buf, 0, &val); if (ret) return ret; flags = (u32)val; mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging_rxon.flags) != flags) { /* Cancel any currently running scans... */ if (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags); priv->staging_rxon.flags = cpu_to_le32(flags); iwlcore_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags); static ssize_t show_filter_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "0x%04X\n", le32_to_cpu(priv->active_rxon.filter_flags)); } static ssize_t store_filter_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; u32 filter_flags; int ret = strict_strtoul(buf, 0, &val); if (ret) return ret; filter_flags = (u32)val; mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) { /* Cancel any currently running scans... */ if (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = " "0x%04X\n", filter_flags); priv->staging_rxon.filter_flags = cpu_to_le32(filter_flags); iwlcore_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags, store_filter_flags); static ssize_t store_power_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); int ret; unsigned long mode; mutex_lock(&priv->mutex); ret = strict_strtoul(buf, 10, &mode); if (ret) goto out; ret = iwl_power_set_user_mode(priv, mode); if (ret) { IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n"); goto out; } ret = count; out: mutex_unlock(&priv->mutex); return ret; } static ssize_t show_power_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); int mode = priv->power_data.user_power_setting; int level = priv->power_data.power_mode; char *p = buf; p += sprintf(p, "INDEX:%d\t", level); p += sprintf(p, "USER:%d\n", mode); return p - buf + 1; } static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level, store_power_level); static ssize_t show_qos(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; char *p = buf; int q; for (q = 0; q < AC_NUM; q++) { p += sprintf(p, "\tcw_min\tcw_max\taifsn\ttxop\n"); p += sprintf(p, "AC[%d]\t%u\t%u\t%u\t%u\n", q, priv->qos_data.def_qos_parm.ac[q].cw_min, priv->qos_data.def_qos_parm.ac[q].cw_max, priv->qos_data.def_qos_parm.ac[q].aifsn, priv->qos_data.def_qos_parm.ac[q].edca_txop); } return p - buf + 1; } static DEVICE_ATTR(qos, S_IRUGO, show_qos, NULL); static ssize_t show_statistics(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); u32 size = sizeof(struct iwl_notif_statistics); u32 len = 0, ofs = 0; u8 *data = (u8 *)&priv->statistics; int rc = 0; if (!iwl_is_alive(priv)) return -EAGAIN; mutex_lock(&priv->mutex); rc = iwl_send_statistics_request(priv, 0); mutex_unlock(&priv->mutex); if (rc) { len = sprintf(buf, "Error sending statistics request: 0x%08X\n", rc); return len; } while (size && (PAGE_SIZE - len)) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, 1); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL); /***************************************************************************** * * driver setup and teardown * *****************************************************************************/ static void iwl_setup_deferred_work(struct iwl_priv *priv) { priv->workqueue = create_singlethread_workqueue(DRV_NAME); init_waitqueue_head(&priv->wait_command_queue); INIT_WORK(&priv->up, iwl_bg_up); INIT_WORK(&priv->restart, iwl_bg_restart); INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish); INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill); INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update); INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work); INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start); INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start); iwl_setup_scan_deferred_work(priv); if (priv->cfg->ops->lib->setup_deferred_work) priv->cfg->ops->lib->setup_deferred_work(priv); init_timer(&priv->statistics_periodic); priv->statistics_periodic.data = (unsigned long)priv; priv->statistics_periodic.function = iwl_bg_statistics_periodic; tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl_irq_tasklet, (unsigned long)priv); } static void iwl_cancel_deferred_work(struct iwl_priv *priv) { if (priv->cfg->ops->lib->cancel_deferred_work) priv->cfg->ops->lib->cancel_deferred_work(priv); cancel_delayed_work_sync(&priv->init_alive_start); cancel_delayed_work(&priv->scan_check); cancel_delayed_work(&priv->alive_start); cancel_work_sync(&priv->beacon_update); del_timer_sync(&priv->statistics_periodic); } static struct attribute *iwl_sysfs_entries[] = { &dev_attr_flags.attr, &dev_attr_filter_flags.attr, &dev_attr_power_level.attr, &dev_attr_statistics.attr, &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWLWIFI_DEBUG &dev_attr_debug_level.attr, #endif &dev_attr_version.attr, &dev_attr_qos.attr, NULL }; static struct attribute_group iwl_attribute_group = { .name = NULL, /* put in device directory */ .attrs = iwl_sysfs_entries, }; static struct ieee80211_ops iwl_hw_ops = { .tx = iwl_mac_tx, .start = iwl_mac_start, .stop = iwl_mac_stop, .add_interface = iwl_mac_add_interface, .remove_interface = iwl_mac_remove_interface, .config = iwl_mac_config, .configure_filter = iwl_configure_filter, .set_key = iwl_mac_set_key, .update_tkip_key = iwl_mac_update_tkip_key, .get_stats = iwl_mac_get_stats, .get_tx_stats = iwl_mac_get_tx_stats, .conf_tx = iwl_mac_conf_tx, .reset_tsf = iwl_mac_reset_tsf, .bss_info_changed = iwl_bss_info_changed, .ampdu_action = iwl_mac_ampdu_action, .hw_scan = iwl_mac_hw_scan }; static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0; struct iwl_priv *priv; struct ieee80211_hw *hw; struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data); unsigned long flags; u16 pci_cmd; /************************ * 1. Allocating HW data ************************/ /* Disabling hardware scan means that mac80211 will perform scans * "the hard way", rather than using device's scan. */ if (cfg->mod_params->disable_hw_scan) { if (cfg->mod_params->debug & IWL_DL_INFO) dev_printk(KERN_DEBUG, &(pdev->dev), "Disabling hw_scan\n"); iwl_hw_ops.hw_scan = NULL; } hw = iwl_alloc_all(cfg, &iwl_hw_ops); if (!hw) { err = -ENOMEM; goto out; } priv = hw->priv; /* At this point both hw and priv are allocated. */ SET_IEEE80211_DEV(hw, &pdev->dev); IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n"); priv->cfg = cfg; priv->pci_dev = pdev; #ifdef CONFIG_IWLWIFI_DEBUG priv->debug_level = priv->cfg->mod_params->debug; atomic_set(&priv->restrict_refcnt, 0); #endif /************************** * 2. Initializing PCI bus **************************/ if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); if (err) { err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); /* both attempts failed: */ if (err) { IWL_WARN(priv, "No suitable DMA available.\n"); goto out_pci_disable_device; } } err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; pci_set_drvdata(pdev, priv); /*********************** * 3. Read REV register ***********************/ priv->hw_base = pci_iomap(pdev, 0, 0); if (!priv->hw_base) { err = -ENODEV; goto out_pci_release_regions; } IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n", (unsigned long long) pci_resource_len(pdev, 0)); IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base); iwl_hw_detect(priv); IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n", priv->cfg->name, priv->hw_rev); /* We disable the RETRY_TIMEOUT register (0x41) to keep * PCI Tx retries from interfering with C3 CPU state */ pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); /* amp init */ err = priv->cfg->ops->lib->apm_ops.init(priv); if (err < 0) { IWL_ERR(priv, "Failed to init APMG\n"); goto out_iounmap; } /***************** * 4. Read EEPROM *****************/ /* Read the EEPROM */ err = iwl_eeprom_init(priv); if (err) { IWL_ERR(priv, "Unable to init EEPROM\n"); goto out_iounmap; } err = iwl_eeprom_check_version(priv); if (err) goto out_free_eeprom; /* extract MAC Address */ iwl_eeprom_get_mac(priv, priv->mac_addr); IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr); SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr); /************************ * 5. Setup HW constants ************************/ if (iwl_set_hw_params(priv)) { IWL_ERR(priv, "failed to set hw parameters\n"); goto out_free_eeprom; } /******************* * 6. Setup priv *******************/ err = iwl_init_drv(priv); if (err) goto out_free_eeprom; /* At this point both hw and priv are initialized. */ /******************** * 7. Setup services ********************/ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); pci_enable_msi(priv->pci_dev); err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv); if (err) { IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group); if (err) { IWL_ERR(priv, "failed to create sysfs device attributes\n"); goto out_free_irq; } iwl_setup_deferred_work(priv); iwl_setup_rx_handlers(priv); /********************************** * 8. Setup and register mac80211 **********************************/ /* enable interrupts if needed: hw bug w/a */ pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd); if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd); } iwl_enable_interrupts(priv); err = iwl_setup_mac(priv); if (err) goto out_remove_sysfs; err = iwl_dbgfs_register(priv, DRV_NAME); if (err) IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err); /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else set_bit(STATUS_RF_KILL_HW, &priv->status); err = iwl_rfkill_init(priv); if (err) IWL_ERR(priv, "Unable to initialize RFKILL system. " "Ignoring error: %d\n", err); else iwl_rfkill_set_hw_state(priv); iwl_power_initialize(priv); return 0; out_remove_sysfs: destroy_workqueue(priv->workqueue); priv->workqueue = NULL; sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group); out_free_irq: free_irq(priv->pci_dev->irq, priv); out_disable_msi: pci_disable_msi(priv->pci_dev); iwl_uninit_drv(priv); out_free_eeprom: iwl_eeprom_free(priv); out_iounmap: pci_iounmap(pdev, priv->hw_base); out_pci_release_regions: pci_set_drvdata(pdev, NULL); pci_release_regions(pdev); out_pci_disable_device: pci_disable_device(pdev); out_ieee80211_free_hw: ieee80211_free_hw(priv->hw); out: return err; } static void __devexit iwl_pci_remove(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); unsigned long flags; if (!priv) return; IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n"); iwl_dbgfs_unregister(priv); sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group); /* ieee80211_unregister_hw call wil cause iwl_mac_stop to * to be called and iwl_down since we are removing the device * we need to set STATUS_EXIT_PENDING bit. */ set_bit(STATUS_EXIT_PENDING, &priv->status); if (priv->mac80211_registered) { ieee80211_unregister_hw(priv->hw); priv->mac80211_registered = 0; } else { iwl_down(priv); } /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&priv->lock, flags); iwl_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); iwl_rfkill_unregister(priv); iwl_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwl_rx_queue_free(priv, &priv->rxq); iwl_hw_txq_ctx_free(priv); priv->cfg->ops->smgmt->clear_station_table(priv); iwl_eeprom_free(priv); /*netif_stop_queue(dev); */ flush_workqueue(priv->workqueue); /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes * priv->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(priv->workqueue); priv->workqueue = NULL; free_irq(priv->pci_dev->irq, priv); pci_disable_msi(priv->pci_dev); pci_iounmap(pdev, priv->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); iwl_uninit_drv(priv); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); ieee80211_free_hw(priv->hw); } /***************************************************************************** * * driver and module entry point * *****************************************************************************/ /* Hardware specific file defines the PCI IDs table for that hardware module */ static struct pci_device_id iwl_hw_card_ids[] = { #ifdef CONFIG_IWL4965 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)}, {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)}, #endif /* CONFIG_IWL4965 */ #ifdef CONFIG_IWL5000 {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)}, {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)}, {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)}, {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)}, {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)}, {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)}, /* 5350 WiFi/WiMax */ {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* 5150 Wifi/WiMax */ {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)}, {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)}, /* 6000/6050 Series */ {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)}, {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)}, {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)}, {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000_2agn_cfg)}, {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000_2agn_cfg)}, {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)}, {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)}, {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)}, {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)}, {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)}, /* 1000 Series WiFi */ {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)}, #endif /* CONFIG_IWL5000 */ {0} }; MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids); static struct pci_driver iwl_driver = { .name = DRV_NAME, .id_table = iwl_hw_card_ids, .probe = iwl_pci_probe, .remove = __devexit_p(iwl_pci_remove), #ifdef CONFIG_PM .suspend = iwl_pci_suspend, .resume = iwl_pci_resume, #endif }; static int __init iwl_init(void) { int ret; printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); ret = iwlagn_rate_control_register(); if (ret) { printk(KERN_ERR DRV_NAME "Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&iwl_driver); if (ret) { printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: iwlagn_rate_control_unregister(); return ret; } static void __exit iwl_exit(void) { pci_unregister_driver(&iwl_driver); iwlagn_rate_control_unregister(); } module_exit(iwl_exit); module_init(iwl_init);