/****************************************************************************** * * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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" #include "iwl-agn.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 #define DRV_VERSION IWLWIFI_VERSION VD MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); MODULE_ALIAS("iwl4965"); /** * 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; ret = iwl_check_rxon_cmd(priv); if (ret) { IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n"); return -EINVAL; } /* * receive commit_rxon request * abort any previous channel switch if still in process */ if (priv->switch_rxon.switch_in_progress && (priv->switch_rxon.channel != priv->staging_rxon.channel)) { IWL_DEBUG_11H(priv, "abort channel switch on %d\n", le16_to_cpu(priv->switch_rxon.channel)); priv->switch_rxon.switch_in_progress = false; } /* 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)); iwl_print_rx_config_cmd(priv); return 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_clear_ucode_stations(priv); iwl_restore_stations(priv); ret = iwl_restore_default_wep_keys(priv); if (ret) { IWL_ERR(priv, "Failed to restore WEP keys (%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->cfg->mod_params->sw_crypto); /* Apply the new configuration * RXON unassoc clears the station table in uCode so restoration of * stations is needed after it (the RXON command) completes */ 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; } IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n"); memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon)); iwl_clear_ucode_stations(priv); iwl_restore_stations(priv); ret = iwl_restore_default_wep_keys(priv); if (ret) { IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret); return ret; } } priv->start_calib = 0; if (new_assoc) { /* * allow CTS-to-self if possible for new association. * this is relevant only for 5000 series and up, * but will not damage 4965 */ priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN; /* 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_print_rx_config_cmd(priv); 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 u32 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; } /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ static void iwl_set_beacon_tim(struct iwl_priv *priv, struct iwl_tx_beacon_cmd *tx_beacon_cmd, u8 *beacon, u32 frame_size) { u16 tim_idx; struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; /* * The index is relative to frame start but we start looking at the * variable-length part of the beacon. */ tim_idx = mgmt->u.beacon.variable - beacon; /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ while ((tim_idx < (frame_size - 2)) && (beacon[tim_idx] != WLAN_EID_TIM)) tim_idx += beacon[tim_idx+1] + 2; /* If TIM field was found, set variables */ if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx); tx_beacon_cmd->tim_size = beacon[tim_idx+1]; } else IWL_WARN(priv, "Unable to find TIM Element in beacon\n"); } static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv, struct iwl_frame *frame) { struct iwl_tx_beacon_cmd *tx_beacon_cmd; u32 frame_size; u32 rate_flags; u32 rate; /* * We have to set up the TX command, the TX Beacon command, and the * beacon contents. */ /* Initialize memory */ tx_beacon_cmd = &frame->u.beacon; memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); /* Set up TX beacon contents */ frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame, sizeof(frame->u) - sizeof(*tx_beacon_cmd)); if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE)) return 0; /* Set up TX command fields */ tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size); 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; tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK; /* Set up TX beacon command fields */ iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame, frame_size); /* Set up packet rate and flags */ rate = iwl_rate_get_lowest_plcp(priv); priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant); rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant); if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE)) rate_flags |= RATE_MCS_CCK_MSK; tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); 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; frame = iwl_get_free_frame(priv); if (!frame) { IWL_ERR(priv, "Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } frame_size = iwl_hw_get_beacon_cmd(priv, frame); if (!frame_size) { IWL_ERR(priv, "Error configuring the beacon command\n"); iwl_free_frame(priv, frame); return -EINVAL; } 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->meta[index], mapping), pci_unmap_len(&txq->meta[index], 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 txq_id = txq->q.id; /* Circular buffer (TFD queue in DRAM) physical base address */ iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); return 0; } /****************************************************************************** * * 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 = rxb_addr(rxb); 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, false); } static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base, u32 start_idx, u32 num_events, u32 mode) { u32 i; u32 ptr; /* SRAM byte address of log data */ u32 ev, time, data; /* event log data */ unsigned long reg_flags; if (mode == 0) ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32)); else ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32)); /* Make sure device is powered up for SRAM reads */ spin_lock_irqsave(&priv->reg_lock, reg_flags); if (iwl_grab_nic_access(priv)) { spin_unlock_irqrestore(&priv->reg_lock, reg_flags); return; } /* Set starting address; reads will auto-increment */ _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr); rmb(); /* * "time" is actually "data" for mode 0 (no timestamp). * place event id # at far right for easier visual parsing. */ for (i = 0; i < num_events; i++) { ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (mode == 0) { trace_iwlwifi_dev_ucode_cont_event(priv, 0, time, ev); } else { data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); trace_iwlwifi_dev_ucode_cont_event(priv, time, data, ev); } } /* Allow device to power down */ iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->reg_lock, reg_flags); } static void iwl_continuous_event_trace(struct iwl_priv *priv) { u32 capacity; /* event log capacity in # entries */ u32 base; /* SRAM byte address of event log header */ u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ u32 num_wraps; /* # times uCode wrapped to top of log */ u32 next_entry; /* index of next entry to be written by uCode */ if (priv->ucode_type == UCODE_INIT) base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr); else base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) { capacity = iwl_read_targ_mem(priv, base); num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32))); mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32))); next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32))); } else return; if (num_wraps == priv->event_log.num_wraps) { iwl_print_cont_event_trace(priv, base, priv->event_log.next_entry, next_entry - priv->event_log.next_entry, mode); priv->event_log.non_wraps_count++; } else { if ((num_wraps - priv->event_log.num_wraps) > 1) priv->event_log.wraps_more_count++; else priv->event_log.wraps_once_count++; trace_iwlwifi_dev_ucode_wrap_event(priv, num_wraps - priv->event_log.num_wraps, next_entry, priv->event_log.next_entry); if (next_entry < priv->event_log.next_entry) { iwl_print_cont_event_trace(priv, base, priv->event_log.next_entry, capacity - priv->event_log.next_entry, mode); iwl_print_cont_event_trace(priv, base, 0, next_entry, mode); } else { iwl_print_cont_event_trace(priv, base, next_entry, capacity - next_entry, mode); iwl_print_cont_event_trace(priv, base, 0, next_entry, mode); } } priv->event_log.num_wraps = num_wraps; priv->event_log.next_entry = next_entry; } /** * iwl_bg_ucode_trace - Timer callback to log ucode event * * The timer is continually set to execute every * UCODE_TRACE_PERIOD milliseconds after the last timer expired * this function is to perform continuous uCode event logging operation * if enabled */ static void iwl_bg_ucode_trace(unsigned long data) { struct iwl_priv *priv = (struct iwl_priv *)data; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (priv->event_log.ucode_trace) { iwl_continuous_event_trace(priv); /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */ mod_timer(&priv->ucode_trace, jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD)); } } 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 = rxb_addr(rxb); 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 = rxb_addr(rxb); 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 CT:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On", (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached"); if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); iwl_write_direct32(priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); if (!(flags & RXON_CARD_DISABLED)) { iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); iwl_write_direct32(priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); } if (flags & CT_CARD_DISABLED) iwl_tt_enter_ct_kill(priv); } if (!(flags & CT_CARD_DISABLED)) iwl_tt_exit_ct_kill(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 & RXON_CARD_DISABLED)) iwl_scan_cancel(priv); if ((test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))) wiphy_rfkill_set_hw_state(priv->hw->wiphy, test_bit(STATUS_RF_KILL_HW, &priv->status)); else wake_up_interruptible(&priv->wait_command_queue); } int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src) { 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); } return 0; } /** * 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[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif; 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_reply_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics; 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] = iwlagn_rx_reply_rx_phy; priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx; /* block ack */ priv->rx_handlers[REPLY_COMPRESSED_BA] = iwlagn_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; int total_empty; /* 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); /* 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; 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_page(priv->pci_dev, rxb->page_dma, PAGE_SIZE << priv->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); pkt = rxb_addr(rxb); trace_iwlwifi_dev_rx(priv, pkt, le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK); /* 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->isr_stats.rx_handlers[pkt->hdr.cmd]++; priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); } 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); } /* * XXX: After here, we should always check rxb->page * against NULL before touching it or its virtual * memory (pkt). Because some rx_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 iwl_send_cmd() * as we reclaim the driver command queue */ if (rxb->page) iwl_tx_cmd_complete(priv, rxb); else IWL_WARN(priv, "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(priv->pci_dev, rxb->page, 0, PAGE_SIZE << priv->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); 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 wont assert. */ if (fill_rx) { count++; if (count >= 8) { rxq->read = i; iwlagn_rx_replenish_now(priv); count = 0; } } } /* Backtrack one entry */ rxq->read = i; if (fill_rx) iwlagn_rx_replenish_now(priv); else iwlagn_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_legacy(struct iwl_priv *priv) { u32 inta, handled = 0; u32 inta_fh; unsigned long flags; u32 i; #ifdef CONFIG_IWLWIFI_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&priv->lock, flags); /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, * and will clear only when CSR_FH_INT_STATUS gets cleared. */ inta = iwl_read32(priv, CSR_INT); iwl_write32(priv, CSR_INT, inta); /* Ack/clear/reset pending flow-handler (DMA) interrupts. * Any new interrupts that happen after this, either while we're * in this tasklet, or later, will show up in next ISR/tasklet. */ inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif spin_unlock_irqrestore(&priv->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 & 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, "Hardware error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl_disable_interrupts(priv); priv->isr_stats.hw++; iwl_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; return; } #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { IWL_DEBUG_ISR(priv, "Scheduler finished to transmit " "the frame/frames.\n"); priv->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { IWL_DEBUG_ISR(priv, "Alive interrupt\n"); priv->isr_stats.alive++; } } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* 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_WARN(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); wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_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. * Tell device about any new tx or host commands enqueued, * and about any Rx buffers made available while asleep. */ if (inta & CSR_INT_BIT_WAKEUP) { IWL_DEBUG_ISR(priv, "Wakeup interrupt\n"); iwl_rx_queue_update_write_ptr(priv, &priv->rxq); for (i = 0; i < priv->hw_params.max_txq_num; i++) iwl_txq_update_write_ptr(priv, &priv->txq[i]); 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); } /* This "Tx" DMA channel is used only for loading uCode */ if (inta & CSR_INT_BIT_FH_TX) { IWL_DEBUG_ISR(priv, "uCode load interrupt\n"); priv->isr_stats.tx++; handled |= CSR_INT_BIT_FH_TX; /* Wake up uCode load routine, now that load is complete */ 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 & ~(priv->inta_mask)) { IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", inta & ~priv->inta_mask); IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if diabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl_enable_interrupts(priv); #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) { inta = iwl_read32(priv, CSR_INT); inta_mask = iwl_read32(priv, CSR_INT_MASK); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif } /* tasklet for iwlagn interrupt */ static void iwl_irq_tasklet(struct iwl_priv *priv) { u32 inta = 0; u32 handled = 0; unsigned long flags; u32 i; #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, */ /* There is a hardware bug in the interrupt mask function that some * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if * they are disabled in the CSR_INT_MASK register. Furthermore the * ICT interrupt handling mechanism has another bug that might cause * these unmasked interrupts fail to be detected. We workaround the * hardware bugs here by ACKing all the possible interrupts so that * interrupt coalescing can still be achieved. */ iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask); inta = priv->_agn.inta; #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ", inta, inta_mask); } #endif spin_unlock_irqrestore(&priv->lock, flags); /* saved interrupt in inta variable now we can reset priv->_agn.inta */ priv->_agn.inta = 0; /* Now service all interrupt bits discovered above. */ if (inta & CSR_INT_BIT_HW_ERR) { IWL_ERR(priv, "Hardware error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl_disable_interrupts(priv); priv->isr_stats.hw++; iwl_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; return; } #ifdef CONFIG_IWLWIFI_DEBUG if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) { IWL_DEBUG_ISR(priv, "Scheduler finished to transmit " "the frame/frames.\n"); priv->isr_stats.sch++; } /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) { IWL_DEBUG_ISR(priv, "Alive interrupt\n"); priv->isr_stats.alive++; } } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* 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_WARN(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); wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_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); for (i = 0; i < priv->hw_params.max_txq_num; i++) iwl_txq_update_write_ptr(priv, &priv->txq[i]); 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 | CSR_INT_BIT_RX_PERIODIC)) { IWL_DEBUG_ISR(priv, "Rx interrupt\n"); if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_RX_MASK); } if (inta & CSR_INT_BIT_RX_PERIODIC) { handled |= CSR_INT_BIT_RX_PERIODIC; iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC); } /* Sending RX interrupt require many steps to be done in the * the device: * 1- write interrupt to current index in ICT table. * 2- dma RX frame. * 3- update RX shared data to indicate last write index. * 4- send interrupt. * This could lead to RX race, driver could receive RX interrupt * but the shared data changes does not reflect this; * periodic interrupt will detect any dangling Rx activity. */ /* Disable periodic interrupt; we use it as just a one-shot. */ iwl_write8(priv, CSR_INT_PERIODIC_REG, CSR_INT_PERIODIC_DIS); iwl_rx_handle(priv); /* * Enable periodic interrupt in 8 msec only if we received * real RX interrupt (instead of just periodic int), to catch * any dangling Rx interrupt. If it was just the periodic * interrupt, there was no dangling Rx activity, and no need * to extend the periodic interrupt; one-shot is enough. */ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) iwl_write8(priv, CSR_INT_PERIODIC_REG, CSR_INT_PERIODIC_ENA); priv->isr_stats.rx++; } /* This "Tx" DMA channel is used only for loading uCode */ if (inta & CSR_INT_BIT_FH_TX) { iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK); IWL_DEBUG_ISR(priv, "uCode load interrupt\n"); priv->isr_stats.tx++; handled |= CSR_INT_BIT_FH_TX; /* Wake up uCode load routine, now that load is complete */ 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 & ~(priv->inta_mask)) { IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", inta & ~priv->inta_mask); } /* Re-enable all interrupts */ /* only Re-enable if diabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl_enable_interrupts(priv); } /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */ #define ACK_CNT_RATIO (50) #define BA_TIMEOUT_CNT (5) #define BA_TIMEOUT_MAX (16) /** * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries. * * When the ACK count ratio is 0 and aggregated BA timeout retries exceeding * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal * operation state. */ bool iwl_good_ack_health(struct iwl_priv *priv, struct iwl_rx_packet *pkt) { bool rc = true; int actual_ack_cnt_delta, expected_ack_cnt_delta; int ba_timeout_delta; actual_ack_cnt_delta = le32_to_cpu(pkt->u.stats.tx.actual_ack_cnt) - le32_to_cpu(priv->statistics.tx.actual_ack_cnt); expected_ack_cnt_delta = le32_to_cpu(pkt->u.stats.tx.expected_ack_cnt) - le32_to_cpu(priv->statistics.tx.expected_ack_cnt); ba_timeout_delta = le32_to_cpu(pkt->u.stats.tx.agg.ba_timeout) - le32_to_cpu(priv->statistics.tx.agg.ba_timeout); if ((priv->_agn.agg_tids_count > 0) && (expected_ack_cnt_delta > 0) && (((actual_ack_cnt_delta * 100) / expected_ack_cnt_delta) < ACK_CNT_RATIO) && (ba_timeout_delta > BA_TIMEOUT_CNT)) { IWL_DEBUG_RADIO(priv, "actual_ack_cnt delta = %d," " expected_ack_cnt = %d\n", actual_ack_cnt_delta, expected_ack_cnt_delta); #ifdef CONFIG_IWLWIFI_DEBUG IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta = %d\n", priv->delta_statistics.tx.rx_detected_cnt); IWL_DEBUG_RADIO(priv, "ack_or_ba_timeout_collision delta = %d\n", priv->delta_statistics.tx. ack_or_ba_timeout_collision); #endif IWL_DEBUG_RADIO(priv, "agg ba_timeout delta = %d\n", ba_timeout_delta); if (!actual_ack_cnt_delta && (ba_timeout_delta >= BA_TIMEOUT_MAX)) rc = false; } return rc; } /****************************************************************************** * * 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); } struct iwlagn_ucode_capabilities { u32 max_probe_length; }; static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context); static int iwl_mac_setup_register(struct iwl_priv *priv, struct iwlagn_ucode_capabilities *capa); static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first) { const char *name_pre = priv->cfg->fw_name_pre; if (first) priv->fw_index = priv->cfg->ucode_api_max; else priv->fw_index--; if (priv->fw_index < priv->cfg->ucode_api_min) { IWL_ERR(priv, "no suitable firmware found!\n"); return -ENOENT; } sprintf(priv->firmware_name, "%s%d%s", name_pre, priv->fw_index, ".ucode"); IWL_DEBUG_INFO(priv, "attempting to load firmware '%s'\n", priv->firmware_name); return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name, &priv->pci_dev->dev, GFP_KERNEL, priv, iwl_ucode_callback); } struct iwlagn_firmware_pieces { const void *inst, *data, *init, *init_data, *boot; size_t inst_size, data_size, init_size, init_data_size, boot_size; u32 build; }; static int iwlagn_load_legacy_firmware(struct iwl_priv *priv, const struct firmware *ucode_raw, struct iwlagn_firmware_pieces *pieces) { struct iwl_ucode_header *ucode = (void *)ucode_raw->data; u32 api_ver, hdr_size; const u8 *src; priv->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IWL_UCODE_API(priv->ucode_ver); switch (api_ver) { default: /* * 4965 doesn't revision the firmware file format * along with the API version, it always uses v1 * file format. */ if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_4965) { hdr_size = 28; if (ucode_raw->size < hdr_size) { IWL_ERR(priv, "File size too small!\n"); return -EINVAL; } pieces->build = le32_to_cpu(ucode->u.v2.build); pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size); pieces->data_size = le32_to_cpu(ucode->u.v2.data_size); pieces->init_size = le32_to_cpu(ucode->u.v2.init_size); pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size); pieces->boot_size = le32_to_cpu(ucode->u.v2.boot_size); src = ucode->u.v2.data; break; } /* fall through for 4965 */ case 0: case 1: case 2: hdr_size = 24; if (ucode_raw->size < hdr_size) { IWL_ERR(priv, "File size too small!\n"); return -EINVAL; } pieces->build = 0; pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size); pieces->data_size = le32_to_cpu(ucode->u.v1.data_size); pieces->init_size = le32_to_cpu(ucode->u.v1.init_size); pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size); pieces->boot_size = le32_to_cpu(ucode->u.v1.boot_size); src = ucode->u.v1.data; break; } /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size != hdr_size + pieces->inst_size + pieces->data_size + pieces->init_size + pieces->init_data_size + pieces->boot_size) { IWL_ERR(priv, "uCode file size %d does not match expected size\n", (int)ucode_raw->size); return -EINVAL; } pieces->inst = src; src += pieces->inst_size; pieces->data = src; src += pieces->data_size; pieces->init = src; src += pieces->init_size; pieces->init_data = src; src += pieces->init_data_size; pieces->boot = src; src += pieces->boot_size; return 0; } static int iwlagn_wanted_ucode_alternative = 1; static int iwlagn_load_firmware(struct iwl_priv *priv, const struct firmware *ucode_raw, struct iwlagn_firmware_pieces *pieces, struct iwlagn_ucode_capabilities *capa) { struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data; struct iwl_ucode_tlv *tlv; size_t len = ucode_raw->size; const u8 *data; int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp; u64 alternatives; if (len < sizeof(*ucode)) return -EINVAL; if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) return -EINVAL; /* * Check which alternatives are present, and "downgrade" * when the chosen alternative is not present, warning * the user when that happens. Some files may not have * any alternatives, so don't warn in that case. */ alternatives = le64_to_cpu(ucode->alternatives); tmp = wanted_alternative; if (wanted_alternative > 63) wanted_alternative = 63; while (wanted_alternative && !(alternatives & BIT(wanted_alternative))) wanted_alternative--; if (wanted_alternative && wanted_alternative != tmp) IWL_WARN(priv, "uCode alternative %d not available, choosing %d\n", tmp, wanted_alternative); priv->ucode_ver = le32_to_cpu(ucode->ver); pieces->build = le32_to_cpu(ucode->build); data = ucode->data; len -= sizeof(*ucode); while (len >= sizeof(*tlv)) { u32 tlv_len; enum iwl_ucode_tlv_type tlv_type; u16 tlv_alt; const u8 *tlv_data; len -= sizeof(*tlv); tlv = (void *)data; tlv_len = le32_to_cpu(tlv->length); tlv_type = le16_to_cpu(tlv->type); tlv_alt = le16_to_cpu(tlv->alternative); tlv_data = tlv->data; if (len < tlv_len) return -EINVAL; len -= ALIGN(tlv_len, 4); data += sizeof(*tlv) + ALIGN(tlv_len, 4); /* * Alternative 0 is always valid. * * Skip alternative TLVs that are not selected. */ if (tlv_alt != 0 && tlv_alt != wanted_alternative) continue; switch (tlv_type) { case IWL_UCODE_TLV_INST: pieces->inst = tlv_data; pieces->inst_size = tlv_len; break; case IWL_UCODE_TLV_DATA: pieces->data = tlv_data; pieces->data_size = tlv_len; break; case IWL_UCODE_TLV_INIT: pieces->init = tlv_data; pieces->init_size = tlv_len; break; case IWL_UCODE_TLV_INIT_DATA: pieces->init_data = tlv_data; pieces->init_data_size = tlv_len; break; case IWL_UCODE_TLV_BOOT: pieces->boot = tlv_data; pieces->boot_size = tlv_len; break; case IWL_UCODE_TLV_PROBE_MAX_LEN: if (tlv_len != 4) return -EINVAL; capa->max_probe_length = le32_to_cpup((__le32 *)tlv_data); break; default: break; } } if (len) return -EINVAL; return 0; } /** * iwl_ucode_callback - callback when firmware was loaded * * If loaded successfully, copies the firmware into buffers * for the card to fetch (via DMA). */ static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context) { struct iwl_priv *priv = context; struct iwl_ucode_header *ucode; int err; struct iwlagn_firmware_pieces pieces; const unsigned int api_max = priv->cfg->ucode_api_max; const unsigned int api_min = priv->cfg->ucode_api_min; u32 api_ver; char buildstr[25]; u32 build; struct iwlagn_ucode_capabilities ucode_capa = { .max_probe_length = 200, }; memset(&pieces, 0, sizeof(pieces)); if (!ucode_raw) { IWL_ERR(priv, "request for firmware file '%s' failed.\n", priv->firmware_name); goto try_again; } IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n", priv->firmware_name, ucode_raw->size); /* Make sure that we got at least the API version number */ if (ucode_raw->size < 4) { IWL_ERR(priv, "File size way too small!\n"); goto try_again; } /* Data from ucode file: header followed by uCode images */ ucode = (struct iwl_ucode_header *)ucode_raw->data; if (ucode->ver) err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces); else err = iwlagn_load_firmware(priv, ucode_raw, &pieces, &ucode_capa); if (err) goto try_again; api_ver = IWL_UCODE_API(priv->ucode_ver); build = pieces.build; /* * 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); goto try_again; } 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); if (build) sprintf(buildstr, " build %u", build); else buildstr[0] = '\0'; IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\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), buildstr); snprintf(priv->hw->wiphy->fw_version, sizeof(priv->hw->wiphy->fw_version), "%u.%u.%u.%u%s", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver), buildstr); /* * For any of the failures below (before allocating pci memory) * we will try to load a version with a smaller API -- maybe the * user just got a corrupted version of the latest API. */ 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 = %Zd\n", pieces.inst_size); IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n", pieces.data_size); IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n", pieces.init_size); IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n", pieces.init_data_size); IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %Zd\n", pieces.boot_size); /* Verify that uCode images will fit in card's SRAM */ if (pieces.inst_size > priv->hw_params.max_inst_size) { IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n", pieces.inst_size); goto try_again; } if (pieces.data_size > priv->hw_params.max_data_size) { IWL_ERR(priv, "uCode data len %Zd too large to fit in\n", pieces.data_size); goto try_again; } if (pieces.init_size > priv->hw_params.max_inst_size) { IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n", pieces.init_size); goto try_again; } if (pieces.init_data_size > priv->hw_params.max_data_size) { IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n", pieces.init_data_size); goto try_again; } if (pieces.boot_size > priv->hw_params.max_bsm_size) { IWL_ERR(priv, "uCode boot instr len %Zd too large to fit in\n", pieces.boot_size); goto try_again; } /* 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 = pieces.inst_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code); priv->ucode_data.len = pieces.data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data); priv->ucode_data_backup.len = pieces.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 (pieces.init_size && pieces.init_data_size) { priv->ucode_init.len = pieces.init_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init); priv->ucode_init_data.len = pieces.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 (pieces.boot_size) { priv->ucode_boot.len = pieces.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) */ IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", pieces.inst_size); memcpy(priv->ucode_code.v_addr, pieces.inst, pieces.inst_size); 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 * NOTE: Copy into backup buffer will be done in iwl_up() */ IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", pieces.data_size); memcpy(priv->ucode_data.v_addr, pieces.data, pieces.data_size); memcpy(priv->ucode_data_backup.v_addr, pieces.data, pieces.data_size); /* Initialization instructions */ if (pieces.init_size) { IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n", pieces.init_size); memcpy(priv->ucode_init.v_addr, pieces.init, pieces.init_size); } /* Initialization data */ if (pieces.init_data_size) { IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n", pieces.init_data_size); memcpy(priv->ucode_init_data.v_addr, pieces.init_data, pieces.init_data_size); } /* Bootstrap instructions */ IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", pieces.boot_size); memcpy(priv->ucode_boot.v_addr, pieces.boot, pieces.boot_size); /************************************************** * This is still part of probe() in a sense... * * 9. Setup and register with mac80211 and debugfs **************************************************/ err = iwl_mac_setup_register(priv, &ucode_capa); if (err) goto out_unbind; err = iwl_dbgfs_register(priv, DRV_NAME); if (err) IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err); /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); complete(&priv->_agn.firmware_loading_complete); return; try_again: /* try next, if any */ if (iwl_request_firmware(priv, false)) goto out_unbind; release_firmware(ucode_raw); return; err_pci_alloc: IWL_ERR(priv, "failed to allocate pci memory\n"); iwl_dealloc_ucode_pci(priv); out_unbind: complete(&priv->_agn.firmware_loading_complete); device_release_driver(&priv->pci_dev->dev); release_firmware(ucode_raw); } static const char *desc_lookup_text[] = { "OK", "FAIL", "BAD_PARAM", "BAD_CHECKSUM", "NMI_INTERRUPT_WDG", "SYSASSERT", "FATAL_ERROR", "BAD_COMMAND", "HW_ERROR_TUNE_LOCK", "HW_ERROR_TEMPERATURE", "ILLEGAL_CHAN_FREQ", "VCC_NOT_STABLE", "FH_ERROR", "NMI_INTERRUPT_HOST", "NMI_INTERRUPT_ACTION_PT", "NMI_INTERRUPT_UNKNOWN", "UCODE_VERSION_MISMATCH", "HW_ERROR_ABS_LOCK", "HW_ERROR_CAL_LOCK_FAIL", "NMI_INTERRUPT_INST_ACTION_PT", "NMI_INTERRUPT_DATA_ACTION_PT", "NMI_TRM_HW_ER", "NMI_INTERRUPT_TRM", "NMI_INTERRUPT_BREAK_POINT" "DEBUG_0", "DEBUG_1", "DEBUG_2", "DEBUG_3", "ADVANCED SYSASSERT" }; static const char *desc_lookup(int i) { int max = ARRAY_SIZE(desc_lookup_text) - 1; if (i < 0 || i > max) i = max; return desc_lookup_text[i]; } #define ERROR_START_OFFSET (1 * sizeof(u32)) #define ERROR_ELEM_SIZE (7 * sizeof(u32)) void iwl_dump_nic_error_log(struct iwl_priv *priv) { u32 data2, line; u32 desc, time, count, base, data1; u32 blink1, blink2, ilink1, ilink2; u32 pc, hcmd; if (priv->ucode_type == UCODE_INIT) base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr); else base = le32_to_cpu(priv->card_alive.error_event_table_ptr); if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Not valid error log pointer 0x%08X for %s uCode\n", base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT"); return; } count = iwl_read_targ_mem(priv, base); if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { IWL_ERR(priv, "Start IWL Error Log Dump:\n"); IWL_ERR(priv, "Status: 0x%08lX, count: %d\n", priv->status, count); } desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32)); pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32)); blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32)); blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32)); ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32)); ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32)); data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32)); data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32)); line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32)); time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32)); hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32)); trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line, blink1, blink2, ilink1, ilink2); IWL_ERR(priv, "Desc Time " "data1 data2 line\n"); IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n", desc_lookup(desc), desc, time, data1, data2, line); IWL_ERR(priv, "pc blink1 blink2 ilink1 ilink2 hcmd\n"); IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1, blink2, ilink1, ilink2, hcmd); } #define EVENT_START_OFFSET (4 * sizeof(u32)) /** * iwl_print_event_log - Dump error event log to syslog * */ static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx, u32 num_events, u32 mode, int pos, char **buf, size_t bufsz) { u32 i; u32 base; /* SRAM byte address of event log header */ u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */ u32 ptr; /* SRAM byte address of log data */ u32 ev, time, data; /* event log data */ unsigned long reg_flags; if (num_events == 0) return pos; if (priv->ucode_type == UCODE_INIT) base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr); else base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (mode == 0) event_size = 2 * sizeof(u32); else event_size = 3 * sizeof(u32); ptr = base + EVENT_START_OFFSET + (start_idx * event_size); /* Make sure device is powered up for SRAM reads */ spin_lock_irqsave(&priv->reg_lock, reg_flags); iwl_grab_nic_access(priv); /* Set starting address; reads will auto-increment */ _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr); rmb(); /* "time" is actually "data" for mode 0 (no timestamp). * place event id # at far right for easier visual parsing. */ for (i = 0; i < num_events; i++) { ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (mode == 0) { /* data, ev */ if (bufsz) { pos += scnprintf(*buf + pos, bufsz - pos, "EVT_LOG:0x%08x:%04u\n", time, ev); } else { trace_iwlwifi_dev_ucode_event(priv, 0, time, ev); IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev); } } else { data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (bufsz) { pos += scnprintf(*buf + pos, bufsz - pos, "EVT_LOGT:%010u:0x%08x:%04u\n", time, data, ev); } else { IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n", time, data, ev); trace_iwlwifi_dev_ucode_event(priv, time, data, ev); } } } /* Allow device to power down */ iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->reg_lock, reg_flags); return pos; } /** * iwl_print_last_event_logs - Dump the newest # of event log to syslog */ static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity, u32 num_wraps, u32 next_entry, u32 size, u32 mode, int pos, char **buf, size_t bufsz) { /* * display the newest DEFAULT_LOG_ENTRIES entries * i.e the entries just before the next ont that uCode would fill. */ if (num_wraps) { if (next_entry < size) { pos = iwl_print_event_log(priv, capacity - (size - next_entry), size - next_entry, mode, pos, buf, bufsz); pos = iwl_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else pos = iwl_print_event_log(priv, next_entry - size, size, mode, pos, buf, bufsz); } else { if (next_entry < size) { pos = iwl_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else { pos = iwl_print_event_log(priv, next_entry - size, size, mode, pos, buf, bufsz); } } return pos; } #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20) int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log, char **buf, bool display) { u32 base; /* SRAM byte address of event log header */ u32 capacity; /* event log capacity in # entries */ u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ u32 num_wraps; /* # times uCode wrapped to top of log */ u32 next_entry; /* index of next entry to be written by uCode */ u32 size; /* # entries that we'll print */ int pos = 0; size_t bufsz = 0; if (priv->ucode_type == UCODE_INIT) base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr); else base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Invalid event log pointer 0x%08X for %s uCode\n", base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT"); return -EINVAL; } /* event log header */ capacity = iwl_read_targ_mem(priv, base); mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32))); num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32))); next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32))); if (capacity > priv->cfg->max_event_log_size) { IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n", capacity, priv->cfg->max_event_log_size); capacity = priv->cfg->max_event_log_size; } if (next_entry > priv->cfg->max_event_log_size) { IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n", next_entry, priv->cfg->max_event_log_size); next_entry = priv->cfg->max_event_log_size; } size = num_wraps ? capacity : next_entry; /* bail out if nothing in log */ if (size == 0) { IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n"); return pos; } #ifdef CONFIG_IWLWIFI_DEBUG if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log) size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES) ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size; #else size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES) ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size; #endif IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n", size); #ifdef CONFIG_IWLWIFI_DEBUG if (display) { if (full_log) bufsz = capacity * 48; else bufsz = size * 48; *buf = kmalloc(bufsz, GFP_KERNEL); if (!*buf) return -ENOMEM; } if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) { /* * if uCode has wrapped back to top of log, * start at the oldest entry, * i.e the next one that uCode would fill. */ if (num_wraps) pos = iwl_print_event_log(priv, next_entry, capacity - next_entry, mode, pos, buf, bufsz); /* (then/else) start at top of log */ pos = iwl_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else pos = iwl_print_last_event_logs(priv, capacity, num_wraps, next_entry, size, mode, pos, buf, bufsz); #else pos = iwl_print_last_event_logs(priv, capacity, num_wraps, next_entry, size, mode, pos, buf, bufsz); #endif return pos; } /** * 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; } 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 (priv->cfg->ops->lib->recover_from_tx_stall) { /* Enable timer to monitor the driver queues */ mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period)); } if (iwl_is_rfkill(priv)) return; ieee80211_wake_queues(priv->hw); priv->active_rate = IWL_RATES_MASK; /* Configure Tx antenna selection based on H/W config */ if (priv->cfg->ops->hcmd->set_tx_ant) priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant); 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, NULL); 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 */ priv->cfg->ops->hcmd->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_init(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, true); IWL_DEBUG_INFO(priv, "Updated power mode\n"); 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_clear_ucode_stations(priv); iwl_dealloc_bcast_station(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 bit and return */ if (!iwl_is_init(priv)) { priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill * bit and continue taking the NIC down. */ priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_FW_ERROR, &priv->status) << STATUS_FW_ERROR | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; /* device going down, Stop using ICT table */ iwl_disable_ict(priv); iwlagn_txq_ctx_stop(priv); iwlagn_rxq_stop(priv); /* Power-down device's busmaster DMA clocks */ iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); udelay(5); /* Make sure (redundant) we've released our request to stay awake */ iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); /* Stop the device, and put it in low power state */ priv->cfg->ops->lib->apm_ops.stop(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 HW_READY_TIMEOUT (50) static int iwl_set_hw_ready(struct iwl_priv *priv) { int ret = 0; iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); /* See if we got it */ ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, HW_READY_TIMEOUT); if (ret != -ETIMEDOUT) priv->hw_ready = true; else priv->hw_ready = false; IWL_DEBUG_INFO(priv, "hardware %s\n", (priv->hw_ready == 1) ? "ready" : "not ready"); return ret; } static int iwl_prepare_card_hw(struct iwl_priv *priv) { int ret = 0; IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n"); ret = iwl_set_hw_ready(priv); if (priv->hw_ready) return ret; /* If HW is not ready, prepare the conditions to check again */ iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); /* HW should be ready by now, check again. */ if (ret != -ETIMEDOUT) iwl_set_hw_ready(priv); return ret; } #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; } ret = iwl_alloc_bcast_station(priv, true); if (ret) return ret; iwl_prepare_card_hw(priv); if (!priv->hw_ready) { IWL_WARN(priv, "Exit HW not ready\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)) { wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); iwl_enable_interrupts(priv); IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n"); return 0; } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); ret = iwlagn_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++) { /* 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; /* enable dram interrupt */ iwl_reset_ict(priv); 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_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); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); __iwl_up(priv); mutex_unlock(&priv->mutex); } } 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); iwlagn_rx_replenish(priv); mutex_unlock(&priv->mutex); } #define IWL_DELAY_NEXT_SCAN (HZ*2) void iwl_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif) { struct ieee80211_conf *conf = NULL; int ret = 0; if (!vif || !priv->is_open) return; if (vif->type == NL80211_IFTYPE_AP) { IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__); return; } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 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, vif); 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(vif->bss_conf.aid); IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n", vif->bss_conf.aid, vif->bss_conf.beacon_int); if (vif->bss_conf.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 (vif->bss_conf.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 (vif->type == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } iwlcore_commit_rxon(priv); IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n", vif->bss_conf.aid, priv->active_rxon.bssid_addr); switch (vif->type) { case NL80211_IFTYPE_STATION: break; case NL80211_IFTYPE_ADHOC: iwl_send_beacon_cmd(priv); break; default: IWL_ERR(priv, "%s Should not be called in %d mode\n", __func__, vif->type); break; } /* 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, false); /* 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) /* * Not a mac80211 entry point function, but it fits in with all the * other mac80211 functions grouped here. */ static int iwl_mac_setup_register(struct iwl_priv *priv, struct iwlagn_ucode_capabilities *capa) { int ret; struct ieee80211_hw *hw = priv->hw; hw->rate_control_algorithm = "iwl-agn-rs"; /* Tell mac80211 our characteristics */ hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_AMPDU_AGGREGATION | IEEE80211_HW_SPECTRUM_MGMT; if (!priv->cfg->broken_powersave) hw->flags |= IEEE80211_HW_SUPPORTS_PS | IEEE80211_HW_SUPPORTS_DYNAMIC_PS; if (priv->cfg->sku & IWL_SKU_N) hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | IEEE80211_HW_SUPPORTS_STATIC_SMPS; hw->sta_data_size = sizeof(struct iwl_station_priv); hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY | WIPHY_FLAG_DISABLE_BEACON_HINTS; /* * For now, disable PS by default because it affects * RX performance significantly. */ hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; /* we create the 802.11 header and a zero-length SSID element */ hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; if (priv->bands[IEEE80211_BAND_2GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ]; if (priv->bands[IEEE80211_BAND_5GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ]; ret = ieee80211_register_hw(priv->hw); if (ret) { IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); return ret; } priv->mac80211_registered = 1; return 0; } static int 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); ret = __iwl_up(priv); mutex_unlock(&priv->mutex); 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; } } iwl_led_start(priv); 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) || test_bit(STATUS_SCAN_HW, &priv->status)) { /* 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 (iwlagn_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, struct ieee80211_vif *vif) { int ret = 0; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* The following should be done only at AP bring up */ if (!iwl_is_associated(priv)) { /* RXON - unassoc (to set timing command) */ priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); /* RXON Timing */ iwl_setup_rxon_timing(priv, vif); 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"); /* AP has all antennas */ priv->chain_noise_data.active_chains = priv->hw_params.valid_rx_ant; 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 = 0; if (vif->bss_conf.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 (vif->bss_conf.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 (vif->type == NL80211_IFTYPE_ADHOC) priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwlcore_commit_rxon(priv); } iwl_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_vif *vif, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211(priv, "enter\n"); iwl_update_tkip_key(priv, keyconf, sta ? sta->addr : iwl_bcast_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->cfg->mod_params->sw_crypto) { IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } addr = sta ? sta->addr : iwl_bcast_addr; sta_id = iwl_find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n", addr); return -EINVAL; } mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); /* * 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 && vif->type != 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; } mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); return ret; } static int iwl_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 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"); ret = iwlagn_tx_agg_start(priv, vif, sta->addr, tid, ssn); if (ret == 0) { priv->_agn.agg_tids_count++; IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n", priv->_agn.agg_tids_count); } return ret; case IEEE80211_AMPDU_TX_STOP: IWL_DEBUG_HT(priv, "stop Tx\n"); ret = iwlagn_tx_agg_stop(priv, vif, sta->addr, tid); if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) { priv->_agn.agg_tids_count--; IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n", priv->_agn.agg_tids_count); } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return 0; else return ret; case IEEE80211_AMPDU_TX_OPERATIONAL: /* do nothing */ return -EOPNOTSUPP; default: IWL_DEBUG_HT(priv, "unknown\n"); return -EINVAL; break; } return 0; } static void iwl_mac_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum sta_notify_cmd cmd, struct ieee80211_sta *sta) { struct iwl_priv *priv = hw->priv; struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; int sta_id; switch (cmd) { case STA_NOTIFY_SLEEP: WARN_ON(!sta_priv->client); sta_priv->asleep = true; if (atomic_read(&sta_priv->pending_frames) > 0) ieee80211_sta_block_awake(hw, sta, true); break; case STA_NOTIFY_AWAKE: WARN_ON(!sta_priv->client); if (!sta_priv->asleep) break; sta_priv->asleep = false; sta_id = iwl_find_station(priv, sta->addr); if (sta_id != IWL_INVALID_STATION) iwl_sta_modify_ps_wake(priv, sta_id); break; default: break; } } static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_priv *priv = hw->priv; struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; bool is_ap = vif->type == NL80211_IFTYPE_STATION; int ret; u8 sta_id; IWL_DEBUG_INFO(priv, "received request to add station %pM\n", sta->addr); atomic_set(&sta_priv->pending_frames, 0); if (vif->type == NL80211_IFTYPE_AP) sta_priv->client = true; ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap, &sta_id); if (ret) { IWL_ERR(priv, "Unable to add station %pM (%d)\n", sta->addr, ret); /* Should we return success if return code is EEXIST ? */ return ret; } /* Initialize rate scaling */ IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n", sta->addr); iwl_rs_rate_init(priv, sta, sta_id); return ret; } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLWIFI_DEBUG /* * The following adds a new attribute to the sysfs representation * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/) * used for controlling the debug level. * * See the level definitions in iwl for details. * * The debug_level being managed using sysfs below is a per device debug * level that is used instead of the global debug level if it (the per * device debug level) is set. */ static ssize_t show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv)); } static ssize_t store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); unsigned long val; int ret; ret = strict_strtoul(buf, 0, &val); if (ret) IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf); else { priv->debug_level = val; if (iwl_alloc_traffic_mem(priv)) IWL_ERR(priv, "Not enough memory to generate traffic log\n"); } return strnlen(buf, count); } static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, show_debug_level, store_debug_level); #endif /* CONFIG_IWLWIFI_DEBUG */ static ssize_t show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", 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 { ret = iwl_set_tx_power(priv, val, false); if (ret) IWL_ERR(priv, "failed setting tx power (0x%d).\n", ret); else ret = count; } return ret; } static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power); static ssize_t show_rts_ht_protection(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "%s\n", priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self"); } static ssize_t store_rts_ht_protection(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, "Input is not in decimal form.\n"); else { if (!iwl_is_associated(priv)) priv->cfg->use_rts_for_ht = val ? true : false; else IWL_ERR(priv, "Sta associated with AP - " "Change protection mechanism is not allowed\n"); ret = count; } return ret; } static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO, show_rts_ht_protection, store_rts_ht_protection); /***************************************************************************** * * 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->restart, iwl_bg_restart); INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish); 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; init_timer(&priv->ucode_trace); priv->ucode_trace.data = (unsigned long)priv; priv->ucode_trace.function = iwl_bg_ucode_trace; if (priv->cfg->ops->lib->recover_from_tx_stall) { init_timer(&priv->monitor_recover); priv->monitor_recover.data = (unsigned long)priv; priv->monitor_recover.function = priv->cfg->ops->lib->recover_from_tx_stall; } if (!priv->cfg->use_isr_legacy) tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl_irq_tasklet, (unsigned long)priv); else tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl_irq_tasklet_legacy, (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_work_sync(&priv->start_internal_scan); cancel_delayed_work(&priv->alive_start); cancel_work_sync(&priv->beacon_update); del_timer_sync(&priv->statistics_periodic); del_timer_sync(&priv->ucode_trace); if (priv->cfg->ops->lib->recover_from_tx_stall) del_timer_sync(&priv->monitor_recover); } static void iwl_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates) { int i; for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) { rates[i].bitrate = iwl_rates[i].ieee * 5; rates[i].hw_value = i; /* Rate scaling will work on indexes */ rates[i].hw_value_short = i; rates[i].flags = 0; if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) { /* * If CCK != 1M then set short preamble rate flag. */ rates[i].flags |= (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } static int iwl_init_drv(struct iwl_priv *priv) { int ret; priv->ibss_beacon = NULL; spin_lock_init(&priv->sta_lock); spin_lock_init(&priv->hcmd_lock); INIT_LIST_HEAD(&priv->free_frames); mutex_init(&priv->mutex); mutex_init(&priv->sync_cmd_mutex); priv->ieee_channels = NULL; priv->ieee_rates = NULL; priv->band = IEEE80211_BAND_2GHZ; priv->iw_mode = NL80211_IFTYPE_STATION; priv->current_ht_config.smps = IEEE80211_SMPS_STATIC; priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF; priv->_agn.agg_tids_count = 0; /* initialize force reset */ priv->force_reset[IWL_RF_RESET].reset_duration = IWL_DELAY_NEXT_FORCE_RF_RESET; priv->force_reset[IWL_FW_RESET].reset_duration = IWL_DELAY_NEXT_FORCE_FW_RELOAD; /* Choose which receivers/antennas to use */ if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv); iwl_init_scan_params(priv); /* Set the tx_power_user_lmt to the lowest power level * this value will get overwritten by channel max power avg * from eeprom */ priv->tx_power_user_lmt = IWLAGN_TX_POWER_TARGET_POWER_MIN; ret = iwl_init_channel_map(priv); if (ret) { IWL_ERR(priv, "initializing regulatory failed: %d\n", ret); goto err; } ret = iwlcore_init_geos(priv); if (ret) { IWL_ERR(priv, "initializing geos failed: %d\n", ret); goto err_free_channel_map; } iwl_init_hw_rates(priv, priv->ieee_rates); return 0; err_free_channel_map: iwl_free_channel_map(priv); err: return ret; } static void iwl_uninit_drv(struct iwl_priv *priv) { iwl_calib_free_results(priv); iwlcore_free_geos(priv); iwl_free_channel_map(priv); kfree(priv->scan_cmd); } static struct attribute *iwl_sysfs_entries[] = { &dev_attr_temperature.attr, &dev_attr_tx_power.attr, &dev_attr_rts_ht_protection.attr, #ifdef CONFIG_IWLWIFI_DEBUG &dev_attr_debug_level.attr, #endif 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, .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, .sta_notify = iwl_mac_sta_notify, .sta_add = iwlagn_mac_sta_add, .sta_remove = iwl_mac_sta_remove, }; 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 (iwl_debug_level & 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; priv->inta_mask = CSR_INI_SET_MASK; #ifdef CONFIG_IWLWIFI_DEBUG atomic_set(&priv->restrict_refcnt, 0); #endif if (iwl_alloc_traffic_mem(priv)) IWL_ERR(priv, "Not enough memory to generate traffic log\n"); /************************** * 2. Initializing PCI bus **************************/ if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_BIT_MASK(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); /* these spin locks will be used in apm_ops.init and EEPROM access * we should init now */ spin_lock_init(&priv->reg_lock); spin_lock_init(&priv->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 */ iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); iwl_hw_detect(priv); IWL_INFO(priv, "Detected %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); iwl_prepare_card_hw(priv); if (!priv->hw_ready) { IWL_WARN(priv, "Failed, HW not ready\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); iwl_alloc_isr_ict(priv); err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr, IRQF_SHARED, DRV_NAME, priv); if (err) { IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } err = sysfs_create_group(&pdev->dev.kobj, &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. Enable interrupts and read RFKILL state *********************************************/ /* 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); /* 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); wiphy_rfkill_set_hw_state(priv->hw->wiphy, test_bit(STATUS_RF_KILL_HW, &priv->status)); iwl_power_initialize(priv); iwl_tt_initialize(priv); init_completion(&priv->_agn.firmware_loading_complete); err = iwl_request_firmware(priv, true); if (err) goto out_remove_sysfs; 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); iwl_free_isr_ict(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: iwl_free_traffic_mem(priv); 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; wait_for_completion(&priv->_agn.firmware_loading_complete); 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 device is reset to low power before unloading driver. * This may be redundant with iwl_down(), but there are paths to * run iwl_down() without calling apm_ops.stop(), and there are * paths to avoid running iwl_down() at all before leaving driver. * This (inexpensive) call *makes sure* device is reset. */ priv->cfg->ops->lib->apm_ops.stop(priv); iwl_tt_exit(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_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwlagn_rx_queue_free(priv, &priv->rxq); iwlagn_hw_txq_ctx_free(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; iwl_free_traffic_mem(priv); 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); iwl_free_isr_ict(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 DEFINE_PCI_DEVICE_TABLE(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 /* 5100 Series WiFi */ {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */ /* 5300 Series WiFi */ {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */ /* 5350 Series WiFi/WiMax */ {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */ /* 5150 Series Wifi/WiMax */ {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */ {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */ {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */ /* 6x00 Series */ {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)}, {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)}, {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)}, {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)}, {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)}, {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)}, {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)}, {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)}, /* 6x00 Series Gen2a */ {IWL_PCI_DEVICE(0x0082, 0x1201, iwl6000g2a_2agn_cfg)}, {IWL_PCI_DEVICE(0x0085, 0x1211, iwl6000g2a_2agn_cfg)}, {IWL_PCI_DEVICE(0x0082, 0x1221, iwl6000g2a_2agn_cfg)}, /* 6x50 WiFi/WiMax Series */ {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)}, {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)}, {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)}, {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)}, {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)}, {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)}, /* 1000 Series WiFi */ {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)}, {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)}, {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)}, {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_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); #ifdef CONFIG_IWLWIFI_DEBUG module_param_named(debug50, iwl_debug_level, uint, S_IRUGO); MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)"); module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "debug output mask"); #endif module_param_named(swcrypto50, iwlagn_mod_params.sw_crypto, bool, S_IRUGO); MODULE_PARM_DESC(swcrypto50, "using crypto in software (default 0 [hardware]) (deprecated)"); module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO); MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); module_param_named(queues_num50, iwlagn_mod_params.num_of_queues, int, S_IRUGO); MODULE_PARM_DESC(queues_num50, "number of hw queues in 50xx series (deprecated)"); module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO); MODULE_PARM_DESC(queues_num, "number of hw queues."); module_param_named(11n_disable50, iwlagn_mod_params.disable_11n, int, S_IRUGO); MODULE_PARM_DESC(11n_disable50, "disable 50XX 11n functionality (deprecated)"); module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO); MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); module_param_named(amsdu_size_8K50, iwlagn_mod_params.amsdu_size_8K, int, S_IRUGO); MODULE_PARM_DESC(amsdu_size_8K50, "enable 8K amsdu size in 50XX series (deprecated)"); module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K, int, S_IRUGO); MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size"); module_param_named(fw_restart50, iwlagn_mod_params.restart_fw, int, S_IRUGO); MODULE_PARM_DESC(fw_restart50, "restart firmware in case of error (deprecated)"); module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO); MODULE_PARM_DESC(fw_restart, "restart firmware in case of error"); module_param_named( disable_hw_scan, iwlagn_mod_params.disable_hw_scan, int, S_IRUGO); MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)"); module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int, S_IRUGO); MODULE_PARM_DESC(ucode_alternative, "specify ucode alternative to use from ucode file");