/****************************************************************************** * * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRV_NAME "iwl4965" #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-4965-calib.h" #include "iwl-4965.h" #include "iwl-4965-led.h" /****************************************************************************** * * module boiler plate * ******************************************************************************/ /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux" #ifdef CONFIG_IWLWIFI_LEGACY_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"); void iwl4965_update_chain_flags(struct iwl_priv *priv) { struct iwl_rxon_context *ctx; if (priv->cfg->ops->hcmd->set_rxon_chain) { for_each_context(priv, ctx) { priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx); if (ctx->active.rx_chain != ctx->staging.rx_chain) iwl_legacy_commit_rxon(priv, ctx); } } } static void iwl4965_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 *iwl4965_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 iwl4965_free_frame(struct iwl_priv *priv, struct iwl_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &priv->free_frames); } static u32 iwl4965_fill_beacon_frame(struct iwl_priv *priv, struct ieee80211_hdr *hdr, int left) { lockdep_assert_held(&priv->mutex); if (!priv->beacon_skb) return 0; if (priv->beacon_skb->len > left) return 0; memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len); return priv->beacon_skb->len; } /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */ static void iwl4965_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 iwl4965_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. */ lockdep_assert_held(&priv->mutex); if (!priv->beacon_ctx) { IWL_ERR(priv, "trying to build beacon w/o beacon context!\n"); return 0; } /* Initialize memory */ tx_beacon_cmd = &frame->u.beacon; memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); /* Set up TX beacon contents */ frame_size = iwl4965_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; if (!frame_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->beacon_ctx->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 */ iwl4965_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame, frame_size); /* Set up packet rate and flags */ rate = iwl_legacy_get_lowest_plcp(priv, priv->beacon_ctx); priv->mgmt_tx_ant = iwl4965_toggle_tx_ant(priv, priv->mgmt_tx_ant, priv->hw_params.valid_tx_ant); rate_flags = iwl4965_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 = iwl4965_hw_set_rate_n_flags(rate, rate_flags); return sizeof(*tx_beacon_cmd) + frame_size; } int iwl4965_send_beacon_cmd(struct iwl_priv *priv) { struct iwl_frame *frame; unsigned int frame_size; int rc; frame = iwl4965_get_free_frame(priv); if (!frame) { IWL_ERR(priv, "Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } frame_size = iwl4965_hw_get_beacon_cmd(priv, frame); if (!frame_size) { IWL_ERR(priv, "Error configuring the beacon command\n"); iwl4965_free_frame(priv, frame); return -EINVAL; } rc = iwl_legacy_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, &frame->u.cmd[0]); iwl4965_free_frame(priv, frame); return rc; } static inline dma_addr_t iwl4965_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 iwl4965_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 iwl4965_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 iwl4965_tfd_get_num_tbs(struct iwl_tfd *tfd) { return tfd->num_tbs & 0x1f; } /** * iwl4965_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 iwl4965_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 = iwl4965_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, dma_unmap_addr(&txq->meta[index], mapping), dma_unmap_len(&txq->meta[index], len), PCI_DMA_BIDIRECTIONAL); /* Unmap chunks, if any. */ for (i = 1; i < num_tbs; i++) pci_unmap_single(dev, iwl4965_tfd_tb_get_addr(tfd, i), iwl4965_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE); /* free SKB */ if (txq->txb) { struct sk_buff *skb; skb = txq->txb[txq->q.read_ptr].skb; /* can be called from irqs-disabled context */ if (skb) { dev_kfree_skb_any(skb); txq->txb[txq->q.read_ptr].skb = NULL; } } } int iwl4965_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 = iwl4965_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); iwl4965_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 iwl4965_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_legacy_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8); return 0; } /****************************************************************************** * * Generic RX handler implementations * ******************************************************************************/ static void iwl4965_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"); } /** * iwl4965_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 iwl4965_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_legacy_is_ready_rf(priv)) return; iwl_legacy_send_statistics_request(priv, CMD_ASYNC, false); } static void iwl4965_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_legacy_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_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT); time = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (mode == 0) { trace_iwlwifi_legacy_dev_ucode_cont_event(priv, 0, time, ev); } else { data = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT); trace_iwlwifi_legacy_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 iwl4965_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_legacy_read_targ_mem(priv, base); num_wraps = iwl_legacy_read_targ_mem(priv, base + (2 * sizeof(u32))); mode = iwl_legacy_read_targ_mem(priv, base + (1 * sizeof(u32))); next_entry = iwl_legacy_read_targ_mem(priv, base + (3 * sizeof(u32))); } else return; if (num_wraps == priv->event_log.num_wraps) { iwl4965_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_legacy_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) { iwl4965_print_cont_event_trace(priv, base, priv->event_log.next_entry, capacity - priv->event_log.next_entry, mode); iwl4965_print_cont_event_trace(priv, base, 0, next_entry, mode); } else { iwl4965_print_cont_event_trace(priv, base, next_entry, capacity - next_entry, mode); iwl4965_print_cont_event_trace(priv, base, 0, next_entry, mode); } } priv->event_log.num_wraps = num_wraps; priv->event_log.next_entry = next_entry; } /** * iwl4965_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 iwl4965_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) { iwl4965_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 iwl4965_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl4965_beacon_notif *beacon = (struct iwl4965_beacon_notif *)pkt->u.raw; #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG u8 rate = iwl4965_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 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); } static void iwl4965_perform_ct_kill_task(struct iwl_priv *priv) { unsigned long flags; IWL_DEBUG_POWER(priv, "Stop all queues\n"); if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); iwl_read32(priv, CSR_UCODE_DRV_GP1); spin_lock_irqsave(&priv->reg_lock, flags); if (!iwl_grab_nic_access(priv)) iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->reg_lock, flags); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void iwl4965_rx_card_state_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = 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_legacy_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_legacy_write_direct32(priv, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); } } if (flags & CT_CARD_DISABLED) iwl4965_perform_ct_kill_task(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_legacy_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); } /** * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks * * Setup the RX handlers for each of the reply types sent from the uCode * to the host. * * This function chains into the hardware specific files for them to setup * any hardware specific handlers as well. */ static void iwl4965_setup_rx_handlers(struct iwl_priv *priv) { priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive; priv->rx_handlers[REPLY_ERROR] = iwl_legacy_rx_reply_error; priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_legacy_rx_csa; priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_legacy_rx_spectrum_measure_notif; priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_legacy_rx_pm_sleep_notif; priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_legacy_rx_pm_debug_statistics_notif; priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif; /* * The same handler is used for both the REPLY to a discrete * statistics request from the host as well as for the periodic * statistics notifications (after received beacons) from the uCode. */ priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_reply_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_rx_statistics; iwl_legacy_setup_rx_scan_handlers(priv); /* status change handler */ priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif; priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] = iwl4965_rx_missed_beacon_notif; /* Rx handlers */ priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy; priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx; /* block ack */ priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba; /* Set up hardware specific Rx handlers */ priv->cfg->ops->lib->rx_handler_setup(priv); } /** * iwl4965_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 iwl4965_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) { int len; rxb = rxq->queue[i]; /* If an RXB doesn't have a Rx queue slot associated with it, * then a bug has been introduced in the queue refilling * routines -- catch it here */ BUG_ON(rxb == NULL); rxq->queue[i] = NULL; pci_unmap_page(priv->pci_dev, rxb->page_dma, PAGE_SIZE << priv->hw_params.rx_page_order, PCI_DMA_FROMDEVICE); pkt = rxb_addr(rxb); len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; len += sizeof(u32); /* account for status word */ trace_iwlwifi_legacy_dev_rx(priv, pkt, len); /* 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 iwl4965_setup_rx_handlers() */ if (priv->rx_handlers[pkt->hdr.cmd]) { IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i, iwl_legacy_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, iwl_legacy_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_legacy_send_cmd() * as we reclaim the driver command queue */ if (rxb->page) iwl_legacy_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; iwl4965_rx_replenish_now(priv); count = 0; } } } /* Backtrack one entry */ rxq->read = i; if (fill_rx) iwl4965_rx_replenish_now(priv); else iwl4965_rx_queue_restock(priv); } /* call this function to flush any scheduled tasklet */ static inline void iwl4965_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 iwl4965_irq_tasklet(struct iwl_priv *priv) { u32 inta, handled = 0; u32 inta_fh; unsigned long flags; u32 i; #ifdef CONFIG_IWLWIFI_LEGACY_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_LEGACY_DEBUG if (iwl_legacy_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_legacy_disable_interrupts(priv); priv->isr_stats.hw++; iwl_legacy_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; return; } #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG if (iwl_legacy_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++; iwl_legacy_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_legacy_rx_queue_update_write_ptr(priv, &priv->rxq); for (i = 0; i < priv->hw_params.max_txq_num; i++) iwl_legacy_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)) { iwl4965_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_legacy_enable_interrupts(priv); #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG if (iwl_legacy_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 } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWLWIFI_LEGACY_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 iwl4965_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_legacy_get_debug_level(priv)); } static ssize_t iwl4965_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_legacy_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, iwl4965_show_debug_level, iwl4965_store_debug_level); #endif /* CONFIG_IWLWIFI_LEGACY_DEBUG */ static ssize_t iwl4965_show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_legacy_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", priv->temperature); } static DEVICE_ATTR(temperature, S_IRUGO, iwl4965_show_temperature, NULL); static ssize_t iwl4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_legacy_is_ready_rf(priv)) return sprintf(buf, "off\n"); else return sprintf(buf, "%d\n", priv->tx_power_user_lmt); } static ssize_t iwl4965_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_legacy_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, iwl4965_show_tx_power, iwl4965_store_tx_power); static struct attribute *iwl_sysfs_entries[] = { &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWLWIFI_LEGACY_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, }; /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv) { iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_code); iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data); iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup); iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init); iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init_data); iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_boot); } static void iwl4965_nic_start(struct iwl_priv *priv) { /* Remove all resets to allow NIC to operate */ iwl_write32(priv, CSR_RESET, 0); } static void iwl4965_ucode_callback(const struct firmware *ucode_raw, void *context); static int iwl4965_mac_setup_register(struct iwl_priv *priv, u32 max_probe_length); static int __must_check iwl4965_request_firmware(struct iwl_priv *priv, bool first) { const char *name_pre = priv->cfg->fw_name_pre; char tag[8]; if (first) { priv->fw_index = priv->cfg->ucode_api_max; sprintf(tag, "%d", priv->fw_index); } else { priv->fw_index--; sprintf(tag, "%d", 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%s%s", name_pre, tag, ".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, iwl4965_ucode_callback); } struct iwl4965_firmware_pieces { const void *inst, *data, *init, *init_data, *boot; size_t inst_size, data_size, init_size, init_data_size, boot_size; }; static int iwl4965_load_firmware(struct iwl_priv *priv, const struct firmware *ucode_raw, struct iwl4965_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: 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->inst_size = le32_to_cpu(ucode->v1.inst_size); pieces->data_size = le32_to_cpu(ucode->v1.data_size); pieces->init_size = le32_to_cpu(ucode->v1.init_size); pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size); pieces->boot_size = le32_to_cpu(ucode->v1.boot_size); src = ucode->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; } /** * iwl4965_ucode_callback - callback when firmware was loaded * * If loaded successfully, copies the firmware into buffers * for the card to fetch (via DMA). */ static void iwl4965_ucode_callback(const struct firmware *ucode_raw, void *context) { struct iwl_priv *priv = context; struct iwl_ucode_header *ucode; int err; struct iwl4965_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; u32 max_probe_length = 200; u32 standard_phy_calibration_size = IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE; memset(&pieces, 0, sizeof(pieces)); if (!ucode_raw) { if (priv->fw_index <= priv->cfg->ucode_api_max) 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; err = iwl4965_load_firmware(priv, ucode_raw, &pieces); if (err) goto try_again; api_ver = IWL_UCODE_API(priv->ucode_ver); /* * api_ver should match the api version forming part of the * firmware filename ... but we don't check for that and only rely * on the API version read from firmware header from here on forward */ if (api_ver < api_min || api_ver > api_max) { IWL_ERR(priv, "Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); 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); IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver)); snprintf(priv->hw->wiphy->fw_version, sizeof(priv->hw->wiphy->fw_version), "%u.%u.%u.%u", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver)); /* * 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_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_code); priv->ucode_data.len = pieces.data_size; iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_data); priv->ucode_data_backup.len = pieces.data_size; iwl_legacy_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_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_init); priv->ucode_init_data.len = pieces.init_data_size; iwl_legacy_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_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot); if (!priv->ucode_boot.v_addr) goto err_pci_alloc; } /* Now that we can no longer fail, copy information */ priv->sta_key_max_num = STA_KEY_MAX_NUM; /* 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); /* * figure out the offset of chain noise reset and gain commands * base on the size of standard phy calibration commands table size */ priv->_4965.phy_calib_chain_noise_reset_cmd = standard_phy_calibration_size; priv->_4965.phy_calib_chain_noise_gain_cmd = standard_phy_calibration_size + 1; /************************************************** * This is still part of probe() in a sense... * * 9. Setup and register with mac80211 and debugfs **************************************************/ err = iwl4965_mac_setup_register(priv, max_probe_length); if (err) goto out_unbind; err = iwl_legacy_dbgfs_register(priv, DRV_NAME); if (err) IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err); err = sysfs_create_group(&priv->pci_dev->dev.kobj, &iwl_attribute_group); if (err) { IWL_ERR(priv, "failed to create sysfs device attributes\n"); goto out_unbind; } /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); complete(&priv->_4965.firmware_loading_complete); return; try_again: /* try next, if any */ if (iwl4965_request_firmware(priv, false)) goto out_unbind; release_firmware(ucode_raw); return; err_pci_alloc: IWL_ERR(priv, "failed to allocate pci memory\n"); iwl4965_dealloc_ucode_pci(priv); out_unbind: complete(&priv->_4965.firmware_loading_complete); device_release_driver(&priv->pci_dev->dev); release_firmware(ucode_raw); } static const char * const 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", }; static struct { char *name; u8 num; } advanced_lookup[] = { { "NMI_INTERRUPT_WDG", 0x34 }, { "SYSASSERT", 0x35 }, { "UCODE_VERSION_MISMATCH", 0x37 }, { "BAD_COMMAND", 0x38 }, { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C }, { "FATAL_ERROR", 0x3D }, { "NMI_TRM_HW_ERR", 0x46 }, { "NMI_INTERRUPT_TRM", 0x4C }, { "NMI_INTERRUPT_BREAK_POINT", 0x54 }, { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C }, { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 }, { "NMI_INTERRUPT_HOST", 0x66 }, { "NMI_INTERRUPT_ACTION_PT", 0x7C }, { "NMI_INTERRUPT_UNKNOWN", 0x84 }, { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 }, { "ADVANCED_SYSASSERT", 0 }, }; static const char *iwl4965_desc_lookup(u32 num) { int i; int max = ARRAY_SIZE(desc_lookup_text); if (num < max) return desc_lookup_text[num]; max = ARRAY_SIZE(advanced_lookup) - 1; for (i = 0; i < max; i++) { if (advanced_lookup[i].num == num) break; } return advanced_lookup[i].name; } #define ERROR_START_OFFSET (1 * sizeof(u32)) #define ERROR_ELEM_SIZE (7 * sizeof(u32)) void iwl4965_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_legacy_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_legacy_read_targ_mem(priv, base + 1 * sizeof(u32)); priv->isr_stats.err_code = desc; pc = iwl_legacy_read_targ_mem(priv, base + 2 * sizeof(u32)); blink1 = iwl_legacy_read_targ_mem(priv, base + 3 * sizeof(u32)); blink2 = iwl_legacy_read_targ_mem(priv, base + 4 * sizeof(u32)); ilink1 = iwl_legacy_read_targ_mem(priv, base + 5 * sizeof(u32)); ilink2 = iwl_legacy_read_targ_mem(priv, base + 6 * sizeof(u32)); data1 = iwl_legacy_read_targ_mem(priv, base + 7 * sizeof(u32)); data2 = iwl_legacy_read_targ_mem(priv, base + 8 * sizeof(u32)); line = iwl_legacy_read_targ_mem(priv, base + 9 * sizeof(u32)); time = iwl_legacy_read_targ_mem(priv, base + 11 * sizeof(u32)); hcmd = iwl_legacy_read_targ_mem(priv, base + 22 * sizeof(u32)); trace_iwlwifi_legacy_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 (0x%04X) %010u 0x%08X 0x%08X %u\n", iwl4965_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)) /** * iwl4965_print_event_log - Dump error event log to syslog * */ static int iwl4965_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_legacy_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_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT); time = _iwl_legacy_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_legacy_dev_ucode_event(priv, 0, time, ev); IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev); } } else { data = _iwl_legacy_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_legacy_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; } /** * iwl4965_print_last_event_logs - Dump the newest # of event log to syslog */ static int iwl4965_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 = iwl4965_print_event_log(priv, capacity - (size - next_entry), size - next_entry, mode, pos, buf, bufsz); pos = iwl4965_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else pos = iwl4965_print_event_log(priv, next_entry - size, size, mode, pos, buf, bufsz); } else { if (next_entry < size) { pos = iwl4965_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else { pos = iwl4965_print_event_log(priv, next_entry - size, size, mode, pos, buf, bufsz); } } return pos; } #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20) int iwl4965_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_legacy_read_targ_mem(priv, base); mode = iwl_legacy_read_targ_mem(priv, base + (1 * sizeof(u32))); num_wraps = iwl_legacy_read_targ_mem(priv, base + (2 * sizeof(u32))); next_entry = iwl_legacy_read_targ_mem(priv, base + (3 * sizeof(u32))); size = num_wraps ? capacity : next_entry; /* bail out if nothing in log */ if (size == 0) { IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n"); return pos; } #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG if (!(iwl_legacy_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_LEGACY_DEBUG if (display) { if (full_log) bufsz = capacity * 48; else bufsz = size * 48; *buf = kmalloc(bufsz, GFP_KERNEL); if (!*buf) return -ENOMEM; } if ((iwl_legacy_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 = iwl4965_print_event_log(priv, next_entry, capacity - next_entry, mode, pos, buf, bufsz); /* (then/else) start at top of log */ pos = iwl4965_print_event_log(priv, 0, next_entry, mode, pos, buf, bufsz); } else pos = iwl4965_print_last_event_logs(priv, capacity, num_wraps, next_entry, size, mode, pos, buf, bufsz); #else pos = iwl4965_print_last_event_logs(priv, capacity, num_wraps, next_entry, size, mode, pos, buf, bufsz); #endif return pos; } static void iwl4965_rf_kill_ct_config(struct iwl_priv *priv) { struct iwl_ct_kill_config cmd; unsigned long flags; int ret = 0; spin_lock_irqsave(&priv->lock, flags); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); spin_unlock_irqrestore(&priv->lock, flags); cmd.critical_temperature_R = cpu_to_le32(priv->hw_params.ct_kill_threshold); ret = iwl_legacy_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd); if (ret) IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n"); else IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD " "succeeded, " "critical temperature is %d\n", priv->hw_params.ct_kill_threshold); } static const s8 default_queue_to_tx_fifo[] = { IWL_TX_FIFO_VO, IWL_TX_FIFO_VI, IWL_TX_FIFO_BE, IWL_TX_FIFO_BK, IWL49_CMD_FIFO_NUM, IWL_TX_FIFO_UNUSED, IWL_TX_FIFO_UNUSED, }; static int iwl4965_alive_notify(struct iwl_priv *priv) { u32 a; unsigned long flags; int i, chan; u32 reg_val; spin_lock_irqsave(&priv->lock, flags); /* Clear 4965's internal Tx Scheduler data base */ priv->scd_base_addr = iwl_legacy_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR); a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET; for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4) iwl_legacy_write_targ_mem(priv, a, 0); for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4) iwl_legacy_write_targ_mem(priv, a, 0); for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(priv->hw_params.max_txq_num); a += 4) iwl_legacy_write_targ_mem(priv, a, 0); /* Tel 4965 where to find Tx byte count tables */ iwl_legacy_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR, priv->scd_bc_tbls.dma >> 10); /* Enable DMA channel */ for (chan = 0; chan < FH49_TCSR_CHNL_NUM ; chan++) iwl_legacy_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan), FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); /* Update FH chicken bits */ reg_val = iwl_legacy_read_direct32(priv, FH_TX_CHICKEN_BITS_REG); iwl_legacy_write_direct32(priv, FH_TX_CHICKEN_BITS_REG, reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); /* Disable chain mode for all queues */ iwl_legacy_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0); /* Initialize each Tx queue (including the command queue) */ for (i = 0; i < priv->hw_params.max_txq_num; i++) { /* TFD circular buffer read/write indexes */ iwl_legacy_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0); iwl_legacy_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8)); /* Max Tx Window size for Scheduler-ACK mode */ iwl_legacy_write_targ_mem(priv, priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(i), (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); /* Frame limit */ iwl_legacy_write_targ_mem(priv, priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) + sizeof(u32), (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); } iwl_legacy_write_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << priv->hw_params.max_txq_num) - 1); /* Activate all Tx DMA/FIFO channels */ iwl4965_txq_set_sched(priv, IWL_MASK(0, 6)); iwl4965_set_wr_ptrs(priv, IWL_DEFAULT_CMD_QUEUE_NUM, 0); /* make sure all queue are not stopped */ memset(&priv->queue_stopped[0], 0, sizeof(priv->queue_stopped)); for (i = 0; i < 4; i++) atomic_set(&priv->queue_stop_count[i], 0); /* reset to 0 to enable all the queue first */ priv->txq_ctx_active_msk = 0; /* Map each Tx/cmd queue to its corresponding fifo */ BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7); for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { int ac = default_queue_to_tx_fifo[i]; iwl_txq_ctx_activate(priv, i); if (ac == IWL_TX_FIFO_UNUSED) continue; iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0); } spin_unlock_irqrestore(&priv->lock, flags); return 0; } /** * iwl4965_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 iwl4965_alive_start(struct iwl_priv *priv) { int ret = 0; struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 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 (iwl4965_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 = iwl4965_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); /* Enable watchdog to monitor the driver tx queues */ iwl_legacy_setup_watchdog(priv); if (iwl_legacy_is_rfkill(priv)) return; ieee80211_wake_queues(priv->hw); priv->active_rate = IWL_RATES_MASK; if (iwl_legacy_is_associated_ctx(ctx)) { struct iwl_legacy_rxon_cmd *active_rxon = (struct iwl_legacy_rxon_cmd *)&ctx->active; /* apply any changes in staging */ ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { struct iwl_rxon_context *tmp; /* Initialize our rx_config data */ for_each_context(priv, tmp) iwl_legacy_connection_init_rx_config(priv, tmp); if (priv->cfg->ops->hcmd->set_rxon_chain) priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx); } /* Configure bluetooth coexistence if enabled */ iwl_legacy_send_bt_config(priv); iwl4965_reset_run_time_calib(priv); set_bit(STATUS_READY, &priv->status); /* Configure the adapter for unassociated operation */ iwl_legacy_commit_rxon(priv, ctx); /* At this point, the NIC is initialized and operational */ iwl4965_rf_kill_ct_config(priv); IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n"); wake_up_interruptible(&priv->wait_command_queue); iwl_legacy_power_update_mode(priv, true); IWL_DEBUG_INFO(priv, "Updated power mode\n"); return; restart: queue_work(priv->workqueue, &priv->restart); } static void iwl4965_cancel_deferred_work(struct iwl_priv *priv); static void __iwl4965_down(struct iwl_priv *priv) { unsigned long flags; int exit_pending; IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n"); iwl_legacy_scan_cancel_timeout(priv, 200); exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status); /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set * to prevent rearm timer */ del_timer_sync(&priv->watchdog); iwl_legacy_clear_ucode_stations(priv, NULL); iwl_legacy_dealloc_bcast_stations(priv); iwl_legacy_clear_driver_stations(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_legacy_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl4965_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_legacy_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; iwl4965_txq_ctx_stop(priv); iwl4965_rxq_stop(priv); /* Power-down device's busmaster DMA clocks */ iwl_legacy_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_legacy_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); /* Stop the device, and put it in low power state */ iwl_legacy_apm_stop(priv); exit: memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp)); dev_kfree_skb(priv->beacon_skb); priv->beacon_skb = NULL; /* clear out any free frames */ iwl4965_clear_free_frames(priv); } static void iwl4965_down(struct iwl_priv *priv) { mutex_lock(&priv->mutex); __iwl4965_down(priv); mutex_unlock(&priv->mutex); iwl4965_cancel_deferred_work(priv); } #define HW_READY_TIMEOUT (50) static int iwl4965_set_hw_ready(struct iwl_priv *priv) { int ret = 0; iwl_legacy_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 iwl4965_prepare_card_hw(struct iwl_priv *priv) { int ret = 0; IWL_DEBUG_INFO(priv, "iwl4965_prepare_card_hw enter\n"); ret = iwl4965_set_hw_ready(priv); if (priv->hw_ready) return ret; /* If HW is not ready, prepare the conditions to check again */ iwl_legacy_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) iwl4965_set_hw_ready(priv); return ret; } #define MAX_HW_RESTARTS 5 static int __iwl4965_up(struct iwl_priv *priv) { struct iwl_rxon_context *ctx; 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; } for_each_context(priv, ctx) { ret = iwl4965_alloc_bcast_station(priv, ctx); if (ret) { iwl_legacy_dealloc_bcast_stations(priv); return ret; } } iwl4965_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_legacy_is_rfkill(priv)) { wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); iwl_legacy_enable_interrupts(priv); IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n"); return 0; } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); /* must be initialised before iwl_hw_nic_init */ priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM; ret = iwl4965_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_legacy_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 */ iwl4965_nic_start(priv); IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n"); return 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); __iwl4965_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 iwl4965_bg_init_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, init_alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); priv->cfg->ops->lib->init_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl4965_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl4965_bg_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) { iwl4965_chain_noise_calibration(priv, (void *)&priv->_4965.statistics); iwl4965_sensitivity_calibration(priv, (void *)&priv->_4965.statistics); } mutex_unlock(&priv->mutex); } static void iwl4965_bg_restart(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, restart); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) { struct iwl_rxon_context *ctx; mutex_lock(&priv->mutex); for_each_context(priv, ctx) ctx->vif = NULL; priv->is_open = 0; __iwl4965_down(priv); mutex_unlock(&priv->mutex); iwl4965_cancel_deferred_work(priv); ieee80211_restart_hw(priv->hw); } else { iwl4965_down(priv); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); __iwl4965_up(priv); mutex_unlock(&priv->mutex); } } static void iwl4965_bg_rx_replenish(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rx_replenish); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl4965_rx_replenish(priv); mutex_unlock(&priv->mutex); } /***************************************************************************** * * 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 iwl4965_mac_setup_register(struct iwl_priv *priv, u32 max_probe_length) { int ret; struct ieee80211_hw *hw = priv->hw; struct iwl_rxon_context *ctx; hw->rate_control_algorithm = "iwl-4965-rs"; /* Tell mac80211 our characteristics */ hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_AMPDU_AGGREGATION | IEEE80211_HW_NEED_DTIM_PERIOD | IEEE80211_HW_SPECTRUM_MGMT | IEEE80211_HW_REPORTS_TX_ACK_STATUS; 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->vif_data_size = sizeof(struct iwl_vif_priv); for_each_context(priv, ctx) { hw->wiphy->interface_modes |= ctx->interface_modes; hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; } 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 = 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]; iwl_legacy_leds_init(priv); 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; } int iwl4965_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 = __iwl4965_up(priv); mutex_unlock(&priv->mutex); if (ret) return ret; if (iwl_legacy_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; } } iwl4965_led_enable(priv); out: priv->is_open = 1; IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; } void iwl4965_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; iwl4965_down(priv); flush_workqueue(priv->workqueue); /* enable interrupts again in order to receive rfkill changes */ iwl_write32(priv, CSR_INT, 0xFFFFFFFF); iwl_legacy_enable_interrupts(priv); IWL_DEBUG_MAC80211(priv, "leave\n"); } void iwl4965_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 (iwl4965_tx_skb(priv, skb)) dev_kfree_skb_any(skb); IWL_DEBUG_MACDUMP(priv, "leave\n"); } void iwl4965_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; struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; IWL_DEBUG_MAC80211(priv, "enter\n"); iwl4965_update_tkip_key(priv, vif_priv->ctx, keyconf, sta, iv32, phase1key); IWL_DEBUG_MAC80211(priv, "leave\n"); } int iwl4965_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; struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; struct iwl_rxon_context *ctx = vif_priv->ctx; 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; } sta_id = iwl_legacy_sta_id_or_broadcast(priv, vif_priv->ctx, sta); if (sta_id == IWL_INVALID_STATION) return -EINVAL; mutex_lock(&priv->mutex); iwl_legacy_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->cipher == WLAN_CIPHER_SUITE_WEP40 || key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { if (cmd == SET_KEY) is_default_wep_key = !ctx->key_mapping_keys; else is_default_wep_key = (key->hw_key_idx == HW_KEY_DEFAULT); } switch (cmd) { case SET_KEY: if (is_default_wep_key) ret = iwl4965_set_default_wep_key(priv, vif_priv->ctx, key); else ret = iwl4965_set_dynamic_key(priv, vif_priv->ctx, key, sta_id); IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); break; case DISABLE_KEY: if (is_default_wep_key) ret = iwl4965_remove_default_wep_key(priv, ctx, key); else ret = iwl4965_remove_dynamic_key(priv, ctx, 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; } int iwl4965_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, u8 buf_size) { struct iwl_priv *priv = hw->priv; int ret = -EINVAL; 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; mutex_lock(&priv->mutex); switch (action) { case IEEE80211_AMPDU_RX_START: IWL_DEBUG_HT(priv, "start Rx\n"); ret = iwl4965_sta_rx_agg_start(priv, sta, tid, *ssn); break; case IEEE80211_AMPDU_RX_STOP: IWL_DEBUG_HT(priv, "stop Rx\n"); ret = iwl4965_sta_rx_agg_stop(priv, sta, tid); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) ret = 0; break; case IEEE80211_AMPDU_TX_START: IWL_DEBUG_HT(priv, "start Tx\n"); ret = iwl4965_tx_agg_start(priv, vif, sta, tid, ssn); if (ret == 0) { priv->_4965.agg_tids_count++; IWL_DEBUG_HT(priv, "priv->_4965.agg_tids_count = %u\n", priv->_4965.agg_tids_count); } break; case IEEE80211_AMPDU_TX_STOP: IWL_DEBUG_HT(priv, "stop Tx\n"); ret = iwl4965_tx_agg_stop(priv, vif, sta, tid); if ((ret == 0) && (priv->_4965.agg_tids_count > 0)) { priv->_4965.agg_tids_count--; IWL_DEBUG_HT(priv, "priv->_4965.agg_tids_count = %u\n", priv->_4965.agg_tids_count); } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) ret = 0; break; case IEEE80211_AMPDU_TX_OPERATIONAL: ret = 0; break; } mutex_unlock(&priv->mutex); return ret; } int iwl4965_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; struct iwl_vif_priv *vif_priv = (void *)vif->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); mutex_lock(&priv->mutex); IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", sta->addr); sta_priv->common.sta_id = IWL_INVALID_STATION; atomic_set(&sta_priv->pending_frames, 0); ret = iwl_legacy_add_station_common(priv, vif_priv->ctx, sta->addr, is_ap, sta, &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 ? */ mutex_unlock(&priv->mutex); return ret; } sta_priv->common.sta_id = sta_id; /* Initialize rate scaling */ IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n", sta->addr); iwl4965_rs_rate_init(priv, sta, sta_id); mutex_unlock(&priv->mutex); return 0; } void iwl4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_channel_switch *ch_switch) { struct iwl_priv *priv = hw->priv; const struct iwl_channel_info *ch_info; struct ieee80211_conf *conf = &hw->conf; struct ieee80211_channel *channel = ch_switch->channel; struct iwl_ht_config *ht_conf = &priv->current_ht_config; struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; u16 ch; unsigned long flags = 0; IWL_DEBUG_MAC80211(priv, "enter\n"); if (iwl_legacy_is_rfkill(priv)) goto out_exit; if (test_bit(STATUS_EXIT_PENDING, &priv->status) || test_bit(STATUS_SCANNING, &priv->status)) goto out_exit; if (!iwl_legacy_is_associated_ctx(ctx)) goto out_exit; /* channel switch in progress */ if (priv->switch_rxon.switch_in_progress == true) goto out_exit; mutex_lock(&priv->mutex); if (priv->cfg->ops->lib->set_channel_switch) { ch = channel->hw_value; if (le16_to_cpu(ctx->active.channel) != ch) { ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch); if (!iwl_legacy_is_channel_valid(ch_info)) { IWL_DEBUG_MAC80211(priv, "invalid channel\n"); goto out; } spin_lock_irqsave(&priv->lock, flags); priv->current_ht_config.smps = conf->smps_mode; /* Configure HT40 channels */ ctx->ht.enabled = conf_is_ht(conf); if (ctx->ht.enabled) { if (conf_is_ht40_minus(conf)) { ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; ctx->ht.is_40mhz = true; } else if (conf_is_ht40_plus(conf)) { ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; ctx->ht.is_40mhz = true; } else { ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; ctx->ht.is_40mhz = false; } } else ctx->ht.is_40mhz = false; if ((le16_to_cpu(ctx->staging.channel) != ch)) ctx->staging.flags = 0; iwl_legacy_set_rxon_channel(priv, channel, ctx); iwl_legacy_set_rxon_ht(priv, ht_conf); iwl_legacy_set_flags_for_band(priv, ctx, channel->band, ctx->vif); spin_unlock_irqrestore(&priv->lock, flags); iwl_legacy_set_rate(priv); /* * at this point, staging_rxon has the * configuration for channel switch */ if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) priv->switch_rxon.switch_in_progress = false; } } out: mutex_unlock(&priv->mutex); out_exit: if (!priv->switch_rxon.switch_in_progress) ieee80211_chswitch_done(ctx->vif, false); IWL_DEBUG_MAC80211(priv, "leave\n"); } void iwl4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct iwl_priv *priv = hw->priv; __le32 filter_or = 0, filter_nand = 0; struct iwl_rxon_context *ctx; #define CHK(test, flag) do { \ if (*total_flags & (test)) \ filter_or |= (flag); \ else \ filter_nand |= (flag); \ } while (0) IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", changed_flags, *total_flags); CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); #undef CHK mutex_lock(&priv->mutex); for_each_context(priv, ctx) { ctx->staging.filter_flags &= ~filter_nand; ctx->staging.filter_flags |= filter_or; /* * Not committing directly because hardware can perform a scan, * but we'll eventually commit the filter flags change anyway. */ } mutex_unlock(&priv->mutex); /* * Receiving all multicast frames is always enabled by the * default flags setup in iwl_legacy_connection_init_rx_config() * since we currently do not support programming multicast * filters into the device. */ *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; } /***************************************************************************** * * driver setup and teardown * *****************************************************************************/ static void iwl4965_bg_txpower_work(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, txpower_work); /* If a scan happened to start before we got here * then just return; the statistics notification will * kick off another scheduled work to compensate for * any temperature delta we missed here. */ if (test_bit(STATUS_EXIT_PENDING, &priv->status) || test_bit(STATUS_SCANNING, &priv->status)) return; mutex_lock(&priv->mutex); /* Regardless of if we are associated, we must reconfigure the * TX power since frames can be sent on non-radar channels while * not associated */ priv->cfg->ops->lib->send_tx_power(priv); /* Update last_temperature to keep is_calib_needed from running * when it isn't needed... */ priv->last_temperature = priv->temperature; mutex_unlock(&priv->mutex); } static void iwl4965_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, iwl4965_bg_restart); INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish); INIT_WORK(&priv->run_time_calib_work, iwl4965_bg_run_time_calib_work); INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start); INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start); iwl_legacy_setup_scan_deferred_work(priv); INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work); init_timer(&priv->statistics_periodic); priv->statistics_periodic.data = (unsigned long)priv; priv->statistics_periodic.function = iwl4965_bg_statistics_periodic; init_timer(&priv->ucode_trace); priv->ucode_trace.data = (unsigned long)priv; priv->ucode_trace.function = iwl4965_bg_ucode_trace; init_timer(&priv->watchdog); priv->watchdog.data = (unsigned long)priv; priv->watchdog.function = iwl_legacy_bg_watchdog; tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl4965_irq_tasklet, (unsigned long)priv); } static void iwl4965_cancel_deferred_work(struct iwl_priv *priv) { cancel_work_sync(&priv->txpower_work); cancel_delayed_work_sync(&priv->init_alive_start); cancel_delayed_work(&priv->alive_start); cancel_work_sync(&priv->run_time_calib_work); iwl_legacy_cancel_scan_deferred_work(priv); del_timer_sync(&priv->statistics_periodic); del_timer_sync(&priv->ucode_trace); } static void iwl4965_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 = iwlegacy_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 |= (iwlegacy_rates[i].plcp == IWL_RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } /* * Acquire priv->lock before calling this function ! */ void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index) { iwl_legacy_write_direct32(priv, HBUS_TARG_WRPTR, (index & 0xff) | (txq_id << 8)); iwl_legacy_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index); } void iwl4965_tx_queue_set_status(struct iwl_priv *priv, struct iwl_tx_queue *txq, int tx_fifo_id, int scd_retry) { int txq_id = txq->q.id; /* Find out whether to activate Tx queue */ int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0; /* Set up and activate */ iwl_legacy_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id), (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) | (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) | (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) | (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) | IWL49_SCD_QUEUE_STTS_REG_MSK); txq->sched_retry = scd_retry; IWL_DEBUG_INFO(priv, "%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate", scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); } static int iwl4965_init_drv(struct iwl_priv *priv) { int ret; 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->_4965.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, &priv->contexts[IWL_RXON_CTX_BSS]); iwl_legacy_init_scan_params(priv); ret = iwl_legacy_init_channel_map(priv); if (ret) { IWL_ERR(priv, "initializing regulatory failed: %d\n", ret); goto err; } ret = iwl_legacy_init_geos(priv); if (ret) { IWL_ERR(priv, "initializing geos failed: %d\n", ret); goto err_free_channel_map; } iwl4965_init_hw_rates(priv, priv->ieee_rates); return 0; err_free_channel_map: iwl_legacy_free_channel_map(priv); err: return ret; } static void iwl4965_uninit_drv(struct iwl_priv *priv) { iwl4965_calib_free_results(priv); iwl_legacy_free_geos(priv); iwl_legacy_free_channel_map(priv); kfree(priv->scan_cmd); } static void iwl4965_hw_detect(struct iwl_priv *priv) { priv->hw_rev = _iwl_legacy_read32(priv, CSR_HW_REV); priv->hw_wa_rev = _iwl_legacy_read32(priv, CSR_HW_REV_WA_REG); priv->rev_id = priv->pci_dev->revision; IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n", priv->rev_id); } static int iwl4965_set_hw_params(struct iwl_priv *priv) { priv->hw_params.max_rxq_size = RX_QUEUE_SIZE; priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; if (priv->cfg->mod_params->amsdu_size_8K) priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K); else priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K); priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL; if (priv->cfg->mod_params->disable_11n) priv->cfg->sku &= ~IWL_SKU_N; /* Device-specific setup */ return priv->cfg->ops->lib->set_hw_params(priv); } static const u8 iwl4965_bss_ac_to_fifo[] = { IWL_TX_FIFO_VO, IWL_TX_FIFO_VI, IWL_TX_FIFO_BE, IWL_TX_FIFO_BK, }; static const u8 iwl4965_bss_ac_to_queue[] = { 0, 1, 2, 3, }; static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0, i; 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 ************************/ hw = iwl_legacy_alloc_all(cfg); if (!hw) { err = -ENOMEM; goto out; } priv = hw->priv; /* At this point both hw and priv are allocated. */ /* * The default context is always valid, * more may be discovered when firmware * is loaded. */ priv->valid_contexts = BIT(IWL_RXON_CTX_BSS); for (i = 0; i < NUM_IWL_RXON_CTX; i++) priv->contexts[i].ctxid = i; priv->contexts[IWL_RXON_CTX_BSS].always_active = true; priv->contexts[IWL_RXON_CTX_BSS].is_active = true; priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON; priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING; priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC; priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM; priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID; priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY; priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwl4965_bss_ac_to_fifo; priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwl4965_bss_ac_to_queue; priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes = BIT(NL80211_IFTYPE_ADHOC); priv->contexts[IWL_RXON_CTX_BSS].interface_modes = BIT(NL80211_IFTYPE_STATION); priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP; priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS; priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS; priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS; BUILD_BUG_ON(NUM_IWL_RXON_CTX != 1); 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; if (iwl_legacy_alloc_traffic_mem(priv)) IWL_ERR(priv, "Not enough memory to generate traffic log\n"); /************************** * 2. Initializing PCI bus **************************/ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM); if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_BIT_MASK(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); iwl4965_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); iwl4965_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_legacy_eeprom_init(priv); if (err) { IWL_ERR(priv, "Unable to init EEPROM\n"); goto out_iounmap; } err = iwl4965_eeprom_check_version(priv); if (err) goto out_free_eeprom; if (err) goto out_free_eeprom; /* extract MAC Address */ iwl4965_eeprom_get_mac(priv, priv->addresses[0].addr); IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr); priv->hw->wiphy->addresses = priv->addresses; priv->hw->wiphy->n_addresses = 1; /************************ * 5. Setup HW constants ************************/ if (iwl4965_set_hw_params(priv)) { IWL_ERR(priv, "failed to set hw parameters\n"); goto out_free_eeprom; } /******************* * 6. Setup priv *******************/ err = iwl4965_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_legacy_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); pci_enable_msi(priv->pci_dev); err = request_irq(priv->pci_dev->irq, iwl_legacy_isr, IRQF_SHARED, DRV_NAME, priv); if (err) { IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } iwl4965_setup_deferred_work(priv); iwl4965_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_legacy_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_legacy_power_initialize(priv); init_completion(&priv->_4965.firmware_loading_complete); err = iwl4965_request_firmware(priv, true); if (err) goto out_destroy_workqueue; return 0; out_destroy_workqueue: destroy_workqueue(priv->workqueue); priv->workqueue = NULL; free_irq(priv->pci_dev->irq, priv); out_disable_msi: pci_disable_msi(priv->pci_dev); iwl4965_uninit_drv(priv); out_free_eeprom: iwl_legacy_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_legacy_free_traffic_mem(priv); ieee80211_free_hw(priv->hw); out: return err; } static void __devexit iwl4965_pci_remove(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); unsigned long flags; if (!priv) return; wait_for_completion(&priv->_4965.firmware_loading_complete); IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n"); iwl_legacy_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 iwl4965_down since we are removing the device * we need to set STATUS_EXIT_PENDING bit. */ set_bit(STATUS_EXIT_PENDING, &priv->status); iwl_legacy_leds_exit(priv); if (priv->mac80211_registered) { ieee80211_unregister_hw(priv->hw); priv->mac80211_registered = 0; } else { iwl4965_down(priv); } /* * Make sure device is reset to low power before unloading driver. * This may be redundant with iwl4965_down(), but there are paths to * run iwl4965_down() without calling apm_ops.stop(), and there are * paths to avoid running iwl4965_down() at all before leaving driver. * This (inexpensive) call *makes sure* device is reset. */ iwl_legacy_apm_stop(priv); /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&priv->lock, flags); iwl_legacy_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl4965_synchronize_irq(priv); iwl4965_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwl4965_rx_queue_free(priv, &priv->rxq); iwl4965_hw_txq_ctx_free(priv); iwl_legacy_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_legacy_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); iwl4965_uninit_drv(priv); dev_kfree_skb(priv->beacon_skb); ieee80211_free_hw(priv->hw); } /* * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask * must be called under priv->lock and mac access */ void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask) { iwl_legacy_write_prph(priv, IWL49_SCD_TXFACT, mask); } /***************************************************************************** * * driver and module entry point * *****************************************************************************/ /* Hardware specific file defines the PCI IDs table for that hardware module */ static DEFINE_PCI_DEVICE_TABLE(iwl4965_hw_card_ids) = { #if defined(CONFIG_IWL4965_MODULE) || defined(CONFIG_IWL4965) {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_cfg)}, {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_cfg)}, #endif /* CONFIG_IWL4965 */ {0} }; MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids); static struct pci_driver iwl4965_driver = { .name = DRV_NAME, .id_table = iwl4965_hw_card_ids, .probe = iwl4965_pci_probe, .remove = __devexit_p(iwl4965_pci_remove), .driver.pm = IWL_LEGACY_PM_OPS, }; static int __init iwl4965_init(void) { int ret; pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n"); pr_info(DRV_COPYRIGHT "\n"); ret = iwl4965_rate_control_register(); if (ret) { pr_err("Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&iwl4965_driver); if (ret) { pr_err("Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: iwl4965_rate_control_unregister(); return ret; } static void __exit iwl4965_exit(void) { pci_unregister_driver(&iwl4965_driver); iwl4965_rate_control_unregister(); } module_exit(iwl4965_exit); module_init(iwl4965_init); #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG module_param_named(debug, iwlegacy_debug_level, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "debug output mask"); #endif module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, S_IRUGO); MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])"); module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, S_IRUGO); MODULE_PARM_DESC(queues_num, "number of hw queues."); module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, S_IRUGO); MODULE_PARM_DESC(11n_disable, "disable 11n functionality"); module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, S_IRUGO); MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size"); module_param_named(fw_restart, iwl4965_mod_params.restart_fw, int, S_IRUGO); MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");