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linux/drivers/net/wireless/iwlwifi/iwl-agn.c

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/******************************************************************************
*
* 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 <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#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-agn-calib.h"
#include "iwl-agn.h"
#include "iwl-pci.h"
#include "iwl-trans.h"
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#define DRV_VERSION IWLWIFI_VERSION VD
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
static int iwlagn_ant_coupling;
static bool iwlagn_bt_ch_announce = 1;
void iwl_update_chain_flags(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
for_each_context(priv, ctx) {
iwlagn_set_rxon_chain(priv, ctx);
if (ctx->active.rx_chain != ctx->staging.rx_chain)
iwlagn_commit_rxon(priv, ctx);
}
}
/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
static void iwl_set_beacon_tim(struct iwl_priv *priv,
struct iwl_tx_beacon_cmd *tx_beacon_cmd,
u8 *beacon, u32 frame_size)
{
u16 tim_idx;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
/*
* The index is relative to frame start but we start looking at the
* variable-length part of the beacon.
*/
tim_idx = mgmt->u.beacon.variable - beacon;
/* Parse variable-length elements of beacon to find WLAN_EID_TIM */
while ((tim_idx < (frame_size - 2)) &&
(beacon[tim_idx] != WLAN_EID_TIM))
tim_idx += beacon[tim_idx+1] + 2;
/* If TIM field was found, set variables */
if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
tx_beacon_cmd->tim_size = beacon[tim_idx+1];
} else
IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
}
int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
{
struct iwl_tx_beacon_cmd *tx_beacon_cmd;
struct iwl_host_cmd cmd = {
.id = REPLY_TX_BEACON,
.flags = CMD_SYNC,
};
struct ieee80211_tx_info *info;
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;
}
if (WARN_ON(!priv->beacon_skb))
return -EINVAL;
/* Allocate beacon command */
if (!priv->beacon_cmd)
priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
tx_beacon_cmd = priv->beacon_cmd;
if (!tx_beacon_cmd)
return -ENOMEM;
frame_size = priv->beacon_skb->len;
/* 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 */
iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
frame_size);
/* Set up packet rate and flags */
info = IEEE80211_SKB_CB(priv->beacon_skb);
/*
* Let's set up the rate at least somewhat correctly;
* it will currently not actually be used by the uCode,
* it uses the broadcast station's rate instead.
*/
if (info->control.rates[0].idx < 0 ||
info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
rate = 0;
else
rate = info->control.rates[0].idx;
priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
priv->hw_params.valid_tx_ant);
rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
/* In mac80211, rates for 5 GHz start at 0 */
if (info->band == IEEE80211_BAND_5GHZ)
rate += IWL_FIRST_OFDM_RATE;
else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
tx_beacon_cmd->tx.rate_n_flags =
iwl_hw_set_rate_n_flags(rate, rate_flags);
/* Submit command */
cmd.len[0] = sizeof(*tx_beacon_cmd);
cmd.data[0] = tx_beacon_cmd;
cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
cmd.len[1] = frame_size;
cmd.data[1] = priv->beacon_skb->data;
cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
return trans_send_cmd(priv, &cmd);
}
static void iwl_bg_beacon_update(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, beacon_update);
struct sk_buff *beacon;
mutex_lock(&priv->mutex);
if (!priv->beacon_ctx) {
IWL_ERR(priv, "updating beacon w/o beacon context!\n");
goto out;
}
if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
/*
* The ucode will send beacon notifications even in
* IBSS mode, but we don't want to process them. But
* we need to defer the type check to here due to
* requiring locking around the beacon_ctx access.
*/
goto out;
}
/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
if (!beacon) {
IWL_ERR(priv, "update beacon failed -- keeping old\n");
goto out;
}
/* new beacon skb is allocated every time; dispose previous.*/
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = beacon;
iwlagn_send_beacon_cmd(priv);
out:
mutex_unlock(&priv->mutex);
}
static void iwl_bg_bt_runtime_config(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, bt_runtime_config);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
iwlagn_send_advance_bt_config(priv);
}
static void iwl_bg_bt_full_concurrency(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, bt_full_concurrency);
struct iwl_rxon_context *ctx;
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
goto out;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
goto out;
IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
priv->bt_full_concurrent ?
"full concurrency" : "3-wire");
/*
* LQ & RXON updated cmds must be sent before BT Config cmd
* to avoid 3-wire collisions
*/
for_each_context(priv, ctx) {
iwlagn_set_rxon_chain(priv, ctx);
iwlagn_commit_rxon(priv, ctx);
}
iwlagn_send_advance_bt_config(priv);
out:
mutex_unlock(&priv->mutex);
}
/**
* iwl_bg_statistics_periodic - Timer callback to queue statistics
*
* This callback is provided in order to send a statistics request.
*
* This timer function is continually reset to execute within
* REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
* was received. We need to ensure we receive the statistics in order
* to update the temperature used for calibrating the TXPOWER.
*/
static void iwl_bg_statistics_periodic(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
iwl_send_statistics_request(priv, CMD_ASYNC, false);
}
static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
u32 start_idx, u32 num_events,
u32 mode)
{
u32 i;
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
unsigned long reg_flags;
if (mode == 0)
ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
else
ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
/* Make sure device is powered up for SRAM reads */
spin_lock_irqsave(&priv->reg_lock, reg_flags);
if (iwl_grab_nic_access(priv)) {
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return;
}
/* Set starting address; reads will auto-increment */
iwl_write32(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_read32(priv, HBUS_TARG_MEM_RDAT);
time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
if (mode == 0) {
trace_iwlwifi_dev_ucode_cont_event(priv,
0, time, ev);
} else {
data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
trace_iwlwifi_dev_ucode_cont_event(priv,
time, data, ev);
}
}
/* Allow device to power down */
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
}
static void iwl_continuous_event_trace(struct iwl_priv *priv)
{
u32 capacity; /* event log capacity in # entries */
u32 base; /* SRAM byte address of event log header */
u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
u32 num_wraps; /* # times uCode wrapped to top of log */
u32 next_entry; /* index of next entry to be written by uCode */
base = priv->device_pointers.error_event_table;
if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
capacity = iwl_read_targ_mem(priv, base);
num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
} else
return;
if (num_wraps == priv->event_log.num_wraps) {
iwl_print_cont_event_trace(priv,
base, priv->event_log.next_entry,
next_entry - priv->event_log.next_entry,
mode);
priv->event_log.non_wraps_count++;
} else {
if ((num_wraps - priv->event_log.num_wraps) > 1)
priv->event_log.wraps_more_count++;
else
priv->event_log.wraps_once_count++;
trace_iwlwifi_dev_ucode_wrap_event(priv,
num_wraps - priv->event_log.num_wraps,
next_entry, priv->event_log.next_entry);
if (next_entry < priv->event_log.next_entry) {
iwl_print_cont_event_trace(priv, base,
priv->event_log.next_entry,
capacity - priv->event_log.next_entry,
mode);
iwl_print_cont_event_trace(priv, base, 0,
next_entry, mode);
} else {
iwl_print_cont_event_trace(priv, base,
next_entry, capacity - next_entry,
mode);
iwl_print_cont_event_trace(priv, base, 0,
next_entry, mode);
}
}
priv->event_log.num_wraps = num_wraps;
priv->event_log.next_entry = next_entry;
}
/**
* iwl_bg_ucode_trace - Timer callback to log ucode event
*
* The timer is continually set to execute every
* UCODE_TRACE_PERIOD milliseconds after the last timer expired
* this function is to perform continuous uCode event logging operation
* if enabled
*/
static void iwl_bg_ucode_trace(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (priv->event_log.ucode_trace) {
iwl_continuous_event_trace(priv);
/* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
mod_timer(&priv->ucode_trace,
jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
}
}
static void iwl_bg_tx_flush(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, tx_flush);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* do nothing if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
}
/**
* iwl_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
* frame-received notifications, and other notifications.
*/
static void iwl_rx_handle(struct iwl_priv *priv)
{
struct iwl_rx_mem_buffer *rxb;
struct iwl_rx_packet *pkt;
struct iwl_rx_queue *rxq = &priv->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
u8 fill_rx = 0;
u32 count = 8;
int total_empty;
/* uCode's read index (stored in shared DRAM) indicates the last Rx
* buffer that the driver may process (last buffer filled by ucode). */
r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
i = rxq->read;
/* Rx interrupt, but nothing sent from uCode */
if (i == r)
IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
/* calculate total frames need to be restock after handling RX */
total_empty = r - rxq->write_actual;
if (total_empty < 0)
total_empty += RX_QUEUE_SIZE;
if (total_empty > (RX_QUEUE_SIZE / 2))
fill_rx = 1;
while (i != r) {
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 */
if (WARN_ON(rxb == NULL)) {
i = (i + 1) & RX_QUEUE_MASK;
continue;
}
rxq->queue[i] = NULL;
dma_unmap_page(priv->bus.dev, rxb->page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
DMA_FROM_DEVICE);
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_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);
/*
* Do the notification wait before RX handlers so
* even if the RX handler consumes the RXB we have
* access to it in the notification wait entry.
*/
if (!list_empty(&priv->_agn.notif_waits)) {
struct iwl_notification_wait *w;
spin_lock(&priv->_agn.notif_wait_lock);
list_for_each_entry(w, &priv->_agn.notif_waits, list) {
if (w->cmd == pkt->hdr.cmd) {
w->triggered = true;
if (w->fn)
w->fn(priv, pkt, w->fn_data);
}
}
spin_unlock(&priv->_agn.notif_wait_lock);
wake_up_all(&priv->_agn.notif_waitq);
}
if (priv->pre_rx_handler)
priv->pre_rx_handler(priv, rxb);
/* Based on type of command response or notification,
* handle those that need handling via function in
* rx_handlers table. See iwl_setup_rx_handlers() */
if (priv->rx_handlers[pkt->hdr.cmd]) {
IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
} else {
/* No handling needed */
IWL_DEBUG_RX(priv,
"r %d i %d No handler needed for %s, 0x%02x\n",
r, i, get_cmd_string(pkt->hdr.cmd),
pkt->hdr.cmd);
}
/*
* XXX: After here, we should always check rxb->page
* against NULL before touching it or its virtual
* memory (pkt). Because some rx_handler might have
* already taken or freed the pages.
*/
if (reclaim) {
/* Invoke any callbacks, transfer the buffer to caller,
* and fire off the (possibly) blocking
* trans_send_cmd()
* as we reclaim the driver command queue */
if (rxb->page)
iwl_tx_cmd_complete(priv, rxb);
else
IWL_WARN(priv, "Claim null rxb?\n");
}
/* Reuse the page if possible. For notification packets and
* SKBs that fail to Rx correctly, add them back into the
* rx_free list for reuse later. */
spin_lock_irqsave(&rxq->lock, flags);
if (rxb->page != NULL) {
rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
0, PAGE_SIZE << priv->hw_params.rx_page_order,
DMA_FROM_DEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
} else
list_add_tail(&rxb->list, &rxq->rx_used);
spin_unlock_irqrestore(&rxq->lock, flags);
i = (i + 1) & RX_QUEUE_MASK;
/* If there are a lot of unused frames,
* restock the Rx queue so ucode wont assert. */
if (fill_rx) {
count++;
if (count >= 8) {
rxq->read = i;
iwlagn_rx_replenish_now(priv);
count = 0;
}
}
}
/* Backtrack one entry */
rxq->read = i;
if (fill_rx)
iwlagn_rx_replenish_now(priv);
else
iwlagn_rx_queue_restock(priv);
}
/* tasklet for iwlagn interrupt */
static void iwl_irq_tasklet(struct iwl_priv *priv)
{
u32 inta = 0;
u32 handled = 0;
unsigned long flags;
u32 i;
#ifdef CONFIG_IWLWIFI_DEBUG
u32 inta_mask;
#endif
spin_lock_irqsave(&priv->lock, flags);
/* Ack/clear/reset pending uCode interrupts.
* Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
*/
/* There is a hardware bug in the interrupt mask function that some
* interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
* they are disabled in the CSR_INT_MASK register. Furthermore the
* ICT interrupt handling mechanism has another bug that might cause
* these unmasked interrupts fail to be detected. We workaround the
* hardware bugs here by ACKing all the possible interrupts so that
* interrupt coalescing can still be achieved.
*/
iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
inta = priv->_agn.inta;
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
/* just for debug */
inta_mask = iwl_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
inta, inta_mask);
}
#endif
spin_unlock_irqrestore(&priv->lock, flags);
/* saved interrupt in inta variable now we can reset priv->_agn.inta */
priv->_agn.inta = 0;
/* Now service all interrupt bits discovered above. */
if (inta & CSR_INT_BIT_HW_ERR) {
IWL_ERR(priv, "Hardware error detected. Restarting.\n");
/* Tell the device to stop sending interrupts */
iwl_disable_interrupts(priv);
priv->isr_stats.hw++;
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_HW_ERR;
return;
}
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
/* NIC fires this, but we don't use it, redundant with WAKEUP */
if (inta & CSR_INT_BIT_SCD) {
IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
"the frame/frames.\n");
priv->isr_stats.sch++;
}
/* Alive notification via Rx interrupt will do the real work */
if (inta & CSR_INT_BIT_ALIVE) {
IWL_DEBUG_ISR(priv, "Alive interrupt\n");
priv->isr_stats.alive++;
}
}
#endif
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
/* HW RF KILL switch toggled */
if (inta & CSR_INT_BIT_RF_KILL) {
int hw_rf_kill = 0;
if (!(iwl_read32(priv, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
hw_rf_kill = 1;
IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
hw_rf_kill ? "disable radio" : "enable radio");
priv->isr_stats.rfkill++;
/* driver only loads ucode once setting the interface up.
* the driver allows loading the ucode even if the radio
* is killed. Hence update the killswitch state here. The
* rfkill handler will care about restarting if needed.
*/
if (!test_bit(STATUS_ALIVE, &priv->status)) {
if (hw_rf_kill)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
}
handled |= CSR_INT_BIT_RF_KILL;
}
/* Chip got too hot and stopped itself */
if (inta & CSR_INT_BIT_CT_KILL) {
IWL_ERR(priv, "Microcode CT kill error detected.\n");
priv->isr_stats.ctkill++;
handled |= CSR_INT_BIT_CT_KILL;
}
/* Error detected by uCode */
if (inta & CSR_INT_BIT_SW_ERR) {
IWL_ERR(priv, "Microcode SW error detected. "
" Restarting 0x%X.\n", inta);
priv->isr_stats.sw++;
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_SW_ERR;
}
/* uCode wakes up after power-down sleep */
if (inta & CSR_INT_BIT_WAKEUP) {
IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
for (i = 0; i < priv->hw_params.max_txq_num; i++)
iwl_txq_update_write_ptr(priv, &priv->txq[i]);
priv->isr_stats.wakeup++;
handled |= CSR_INT_BIT_WAKEUP;
}
/* All uCode command responses, including Tx command responses,
* Rx "responses" (frame-received notification), and other
* notifications from uCode come through here*/
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
CSR_INT_BIT_RX_PERIODIC)) {
IWL_DEBUG_ISR(priv, "Rx interrupt\n");
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
iwl_write32(priv, CSR_FH_INT_STATUS,
CSR_FH_INT_RX_MASK);
}
if (inta & CSR_INT_BIT_RX_PERIODIC) {
handled |= CSR_INT_BIT_RX_PERIODIC;
iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
}
/* Sending RX interrupt require many steps to be done in the
* the device:
* 1- write interrupt to current index in ICT table.
* 2- dma RX frame.
* 3- update RX shared data to indicate last write index.
* 4- send interrupt.
* This could lead to RX race, driver could receive RX interrupt
* but the shared data changes does not reflect this;
* periodic interrupt will detect any dangling Rx activity.
*/
/* Disable periodic interrupt; we use it as just a one-shot. */
iwl_write8(priv, CSR_INT_PERIODIC_REG,
CSR_INT_PERIODIC_DIS);
iwl_rx_handle(priv);
/*
* Enable periodic interrupt in 8 msec only if we received
* real RX interrupt (instead of just periodic int), to catch
* any dangling Rx interrupt. If it was just the periodic
* interrupt, there was no dangling Rx activity, and no need
* to extend the periodic interrupt; one-shot is enough.
*/
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
iwl_write8(priv, CSR_INT_PERIODIC_REG,
CSR_INT_PERIODIC_ENA);
priv->isr_stats.rx++;
}
/* This "Tx" DMA channel is used only for loading uCode */
if (inta & CSR_INT_BIT_FH_TX) {
iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
priv->isr_stats.tx++;
handled |= CSR_INT_BIT_FH_TX;
/* Wake up uCode load routine, now that load is complete */
priv->ucode_write_complete = 1;
wake_up_interruptible(&priv->wait_command_queue);
}
if (inta & ~handled) {
IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
priv->isr_stats.unhandled++;
}
if (inta & ~(priv->inta_mask)) {
IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
inta & ~priv->inta_mask);
}
/* Re-enable all interrupts */
/* only Re-enable if disabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl_enable_interrupts(priv);
/* Re-enable RF_KILL if it occurred */
else if (handled & CSR_INT_BIT_RF_KILL)
iwl_enable_rfkill_int(priv);
}
/*****************************************************************************
*
* sysfs attributes
*
*****************************************************************************/
#ifdef CONFIG_IWLWIFI_DEBUG
/*
* The following adds a new attribute to the sysfs representation
* of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
* used for controlling the debug level.
*
* See the level definitions in iwl for details.
*
* The debug_level being managed using sysfs below is a per device debug
* level that is used instead of the global debug level if it (the per
* device debug level) is set.
*/
static ssize_t show_debug_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
}
static ssize_t store_debug_level(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = strict_strtoul(buf, 0, &val);
if (ret)
IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
else {
priv->debug_level = val;
if (iwl_alloc_traffic_mem(priv))
IWL_ERR(priv,
"Not enough memory to generate traffic log\n");
}
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
show_debug_level, store_debug_level);
#endif /* CONFIG_IWLWIFI_DEBUG */
static ssize_t show_temperature(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
if (!iwl_is_alive(priv))
return -EAGAIN;
return sprintf(buf, "%d\n", priv->temperature);
}
static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
static ssize_t show_tx_power(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
if (!iwl_is_ready_rf(priv))
return sprintf(buf, "off\n");
else
return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
}
static ssize_t store_tx_power(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = strict_strtoul(buf, 10, &val);
if (ret)
IWL_INFO(priv, "%s is not in decimal form.\n", buf);
else {
ret = iwl_set_tx_power(priv, val, false);
if (ret)
IWL_ERR(priv, "failed setting tx power (0x%d).\n",
ret);
else
ret = count;
}
return ret;
}
static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
static struct attribute *iwl_sysfs_entries[] = {
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
#ifdef CONFIG_IWLWIFI_DEBUG
&dev_attr_debug_level.attr,
#endif
NULL
};
static struct attribute_group iwl_attribute_group = {
.name = NULL, /* put in device directory */
.attrs = iwl_sysfs_entries,
};
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
{
if (desc->v_addr)
dma_free_coherent(priv->bus.dev, desc->len,
desc->v_addr, desc->p_addr);
desc->v_addr = NULL;
desc->len = 0;
}
static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
{
iwl_free_fw_desc(priv, &img->code);
iwl_free_fw_desc(priv, &img->data);
}
static void iwl_dealloc_ucode(struct iwl_priv *priv)
{
iwl_free_fw_img(priv, &priv->ucode_rt);
iwl_free_fw_img(priv, &priv->ucode_init);
}
static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
const void *data, size_t len)
{
if (!len) {
desc->v_addr = NULL;
return -EINVAL;
}
desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
&desc->p_addr, GFP_KERNEL);
if (!desc->v_addr)
return -ENOMEM;
desc->len = len;
memcpy(desc->v_addr, data, len);
return 0;
}
struct iwlagn_ucode_capabilities {
u32 max_probe_length;
u32 standard_phy_calibration_size;
u32 flags;
};
static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
static int iwl_mac_setup_register(struct iwl_priv *priv,
struct iwlagn_ucode_capabilities *capa);
#define UCODE_EXPERIMENTAL_INDEX 100
#define UCODE_EXPERIMENTAL_TAG "exp"
static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
{
const char *name_pre = priv->cfg->fw_name_pre;
char tag[8];
if (first) {
#ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
strcpy(tag, UCODE_EXPERIMENTAL_TAG);
} else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
#endif
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'%s'\n",
(priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
? "EXPERIMENTAL " : "",
priv->firmware_name);
return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
priv->bus.dev,
GFP_KERNEL, priv, iwl_ucode_callback);
}
struct iwlagn_firmware_pieces {
const void *inst, *data, *init, *init_data;
size_t inst_size, data_size, init_size, init_data_size;
u32 build;
u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
};
static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
const struct firmware *ucode_raw,
struct iwlagn_firmware_pieces *pieces)
{
struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
u32 api_ver, hdr_size;
const u8 *src;
priv->ucode_ver = le32_to_cpu(ucode->ver);
api_ver = IWL_UCODE_API(priv->ucode_ver);
switch (api_ver) {
default:
hdr_size = 28;
if (ucode_raw->size < hdr_size) {
IWL_ERR(priv, "File size too small!\n");
return -EINVAL;
}
pieces->build = le32_to_cpu(ucode->u.v2.build);
pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
src = ucode->u.v2.data;
break;
case 0:
case 1:
case 2:
hdr_size = 24;
if (ucode_raw->size < hdr_size) {
IWL_ERR(priv, "File size too small!\n");
return -EINVAL;
}
pieces->build = 0;
pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
src = ucode->u.v1.data;
break;
}
/* Verify size of file vs. image size info in file's header */
if (ucode_raw->size != hdr_size + pieces->inst_size +
pieces->data_size + pieces->init_size +
pieces->init_data_size) {
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;
return 0;
}
static int iwlagn_wanted_ucode_alternative = 1;
static int iwlagn_load_firmware(struct iwl_priv *priv,
const struct firmware *ucode_raw,
struct iwlagn_firmware_pieces *pieces,
struct iwlagn_ucode_capabilities *capa)
{
struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
struct iwl_ucode_tlv *tlv;
size_t len = ucode_raw->size;
const u8 *data;
int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
u64 alternatives;
u32 tlv_len;
enum iwl_ucode_tlv_type tlv_type;
const u8 *tlv_data;
if (len < sizeof(*ucode)) {
IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
return -EINVAL;
}
if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
le32_to_cpu(ucode->magic));
return -EINVAL;
}
/*
* Check which alternatives are present, and "downgrade"
* when the chosen alternative is not present, warning
* the user when that happens. Some files may not have
* any alternatives, so don't warn in that case.
*/
alternatives = le64_to_cpu(ucode->alternatives);
tmp = wanted_alternative;
if (wanted_alternative > 63)
wanted_alternative = 63;
while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
wanted_alternative--;
if (wanted_alternative && wanted_alternative != tmp)
IWL_WARN(priv,
"uCode alternative %d not available, choosing %d\n",
tmp, wanted_alternative);
priv->ucode_ver = le32_to_cpu(ucode->ver);
pieces->build = le32_to_cpu(ucode->build);
data = ucode->data;
len -= sizeof(*ucode);
while (len >= sizeof(*tlv)) {
u16 tlv_alt;
len -= sizeof(*tlv);
tlv = (void *)data;
tlv_len = le32_to_cpu(tlv->length);
tlv_type = le16_to_cpu(tlv->type);
tlv_alt = le16_to_cpu(tlv->alternative);
tlv_data = tlv->data;
if (len < tlv_len) {
IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
len, tlv_len);
return -EINVAL;
}
len -= ALIGN(tlv_len, 4);
data += sizeof(*tlv) + ALIGN(tlv_len, 4);
/*
* Alternative 0 is always valid.
*
* Skip alternative TLVs that are not selected.
*/
if (tlv_alt != 0 && tlv_alt != wanted_alternative)
continue;
switch (tlv_type) {
case IWL_UCODE_TLV_INST:
pieces->inst = tlv_data;
pieces->inst_size = tlv_len;
break;
case IWL_UCODE_TLV_DATA:
pieces->data = tlv_data;
pieces->data_size = tlv_len;
break;
case IWL_UCODE_TLV_INIT:
pieces->init = tlv_data;
pieces->init_size = tlv_len;
break;
case IWL_UCODE_TLV_INIT_DATA:
pieces->init_data = tlv_data;
pieces->init_data_size = tlv_len;
break;
case IWL_UCODE_TLV_BOOT:
IWL_ERR(priv, "Found unexpected BOOT ucode\n");
break;
case IWL_UCODE_TLV_PROBE_MAX_LEN:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
capa->max_probe_length =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_PAN:
if (tlv_len)
goto invalid_tlv_len;
capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
break;
case IWL_UCODE_TLV_FLAGS:
/* must be at least one u32 */
if (tlv_len < sizeof(u32))
goto invalid_tlv_len;
/* and a proper number of u32s */
if (tlv_len % sizeof(u32))
goto invalid_tlv_len;
/*
* This driver only reads the first u32 as
* right now no more features are defined,
* if that changes then either the driver
* will not work with the new firmware, or
* it'll not take advantage of new features.
*/
capa->flags = le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->init_evtlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->init_evtlog_size =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->init_errlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->inst_evtlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->inst_evtlog_size =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
pieces->inst_errlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
if (tlv_len)
goto invalid_tlv_len;
priv->enhance_sensitivity_table = true;
break;
case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
if (tlv_len != sizeof(u32))
goto invalid_tlv_len;
capa->standard_phy_calibration_size =
le32_to_cpup((__le32 *)tlv_data);
break;
default:
IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
break;
}
}
if (len) {
IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
return -EINVAL;
}
return 0;
invalid_tlv_len:
IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
return -EINVAL;
}
/**
* iwl_ucode_callback - callback when firmware was loaded
*
* If loaded successfully, copies the firmware into buffers
* for the card to fetch (via DMA).
*/
static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
{
struct iwl_priv *priv = context;
struct iwl_ucode_header *ucode;
int err;
struct iwlagn_firmware_pieces pieces;
const unsigned int api_max = priv->cfg->ucode_api_max;
const unsigned int api_min = priv->cfg->ucode_api_min;
u32 api_ver;
char buildstr[25];
u32 build;
struct iwlagn_ucode_capabilities ucode_capa = {
.max_probe_length = 200,
.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;
if (ucode->ver)
err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
else
err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
&ucode_capa);
if (err)
goto try_again;
api_ver = IWL_UCODE_API(priv->ucode_ver);
build = pieces.build;
/*
* api_ver should match the api version forming part of the
* firmware filename ... but we don't check for that and only rely
* on the API version read from firmware header from here on forward
*/
/* no api version check required for experimental uCode */
if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
if (api_ver < api_min || api_ver > api_max) {
IWL_ERR(priv,
"Driver unable to support your firmware API. "
"Driver supports v%u, firmware is v%u.\n",
api_max, api_ver);
goto try_again;
}
if (api_ver != api_max)
IWL_ERR(priv,
"Firmware has old API version. Expected v%u, "
"got v%u. New firmware can be obtained "
"from http://www.intellinuxwireless.org.\n",
api_max, api_ver);
}
if (build)
sprintf(buildstr, " build %u%s", build,
(priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
? " (EXP)" : "");
else
buildstr[0] = '\0';
IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
IWL_UCODE_MAJOR(priv->ucode_ver),
IWL_UCODE_MINOR(priv->ucode_ver),
IWL_UCODE_API(priv->ucode_ver),
IWL_UCODE_SERIAL(priv->ucode_ver),
buildstr);
snprintf(priv->hw->wiphy->fw_version,
sizeof(priv->hw->wiphy->fw_version),
"%u.%u.%u.%u%s",
IWL_UCODE_MAJOR(priv->ucode_ver),
IWL_UCODE_MINOR(priv->ucode_ver),
IWL_UCODE_API(priv->ucode_ver),
IWL_UCODE_SERIAL(priv->ucode_ver),
buildstr);
/*
* For any of the failures below (before allocating pci memory)
* we will try to load a version with a smaller API -- maybe the
* user just got a corrupted version of the latest API.
*/
IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
priv->ucode_ver);
IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
pieces.inst_size);
IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
pieces.data_size);
IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
pieces.init_size);
IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
pieces.init_data_size);
/* 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;
}
/* 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 */
if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
pieces.inst, pieces.inst_size))
goto err_pci_alloc;
if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
pieces.data, pieces.data_size))
goto err_pci_alloc;
/* Initialization instructions and data */
if (pieces.init_size && pieces.init_data_size) {
if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
pieces.init, pieces.init_size))
goto err_pci_alloc;
if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
pieces.init_data, pieces.init_data_size))
goto err_pci_alloc;
}
/* Now that we can no longer fail, copy information */
/*
* The (size - 16) / 12 formula is based on the information recorded
* for each event, which is of mode 1 (including timestamp) for all
* new microcodes that include this information.
*/
priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
if (pieces.init_evtlog_size)
priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
else
priv->_agn.init_evtlog_size =
priv->cfg->base_params->max_event_log_size;
priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
if (pieces.inst_evtlog_size)
priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
else
priv->_agn.inst_evtlog_size =
priv->cfg->base_params->max_event_log_size;
priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
priv->new_scan_threshold_behaviour =
!!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
} else
priv->sta_key_max_num = STA_KEY_MAX_NUM;
if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
else
priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
/*
* figure out the offset of chain noise reset and gain commands
* base on the size of standard phy calibration commands table size
*/
if (ucode_capa.standard_phy_calibration_size >
IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
ucode_capa.standard_phy_calibration_size =
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
priv->_agn.phy_calib_chain_noise_reset_cmd =
ucode_capa.standard_phy_calibration_size;
priv->_agn.phy_calib_chain_noise_gain_cmd =
ucode_capa.standard_phy_calibration_size + 1;
/**************************************************
* This is still part of probe() in a sense...
*
* 9. Setup and register with mac80211 and debugfs
**************************************************/
err = iwl_mac_setup_register(priv, &ucode_capa);
if (err)
goto out_unbind;
err = iwl_dbgfs_register(priv, DRV_NAME);
if (err)
IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
err = sysfs_create_group(&(priv->bus.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->_agn.firmware_loading_complete);
return;
try_again:
/* try next, if any */
if (iwl_request_firmware(priv, false))
goto out_unbind;
release_firmware(ucode_raw);
return;
err_pci_alloc:
IWL_ERR(priv, "failed to allocate pci memory\n");
iwl_dealloc_ucode(priv);
out_unbind:
complete(&priv->_agn.firmware_loading_complete);
device_release_driver(priv->bus.dev);
release_firmware(ucode_raw);
}
static const char *desc_lookup_text[] = {
"OK",
"FAIL",
"BAD_PARAM",
"BAD_CHECKSUM",
"NMI_INTERRUPT_WDG",
"SYSASSERT",
"FATAL_ERROR",
"BAD_COMMAND",
"HW_ERROR_TUNE_LOCK",
"HW_ERROR_TEMPERATURE",
"ILLEGAL_CHAN_FREQ",
"VCC_NOT_STABLE",
"FH_ERROR",
"NMI_INTERRUPT_HOST",
"NMI_INTERRUPT_ACTION_PT",
"NMI_INTERRUPT_UNKNOWN",
"UCODE_VERSION_MISMATCH",
"HW_ERROR_ABS_LOCK",
"HW_ERROR_CAL_LOCK_FAIL",
"NMI_INTERRUPT_INST_ACTION_PT",
"NMI_INTERRUPT_DATA_ACTION_PT",
"NMI_TRM_HW_ER",
"NMI_INTERRUPT_TRM",
"NMI_INTERRUPT_BREAK_POINT"
"DEBUG_0",
"DEBUG_1",
"DEBUG_2",
"DEBUG_3",
};
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 *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 iwl_dump_nic_error_log(struct iwl_priv *priv)
{
u32 base;
struct iwl_error_event_table table;
base = priv->device_pointers.error_event_table;
if (priv->ucode_type == IWL_UCODE_INIT) {
if (!base)
base = priv->_agn.init_errlog_ptr;
} else {
if (!base)
base = priv->_agn.inst_errlog_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 == IWL_UCODE_INIT)
? "Init" : "RT");
return;
}
iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
IWL_ERR(priv, "Start IWL Error Log Dump:\n");
IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
priv->status, table.valid);
}
priv->isr_stats.err_code = table.error_id;
trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
table.data1, table.data2, table.line,
table.blink1, table.blink2, table.ilink1,
table.ilink2, table.bcon_time, table.gp1,
table.gp2, table.gp3, table.ucode_ver,
table.hw_ver, table.brd_ver);
IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
desc_lookup(table.error_id));
IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
IWL_ERR(priv, "0x%08X | data1\n", table.data1);
IWL_ERR(priv, "0x%08X | data2\n", table.data2);
IWL_ERR(priv, "0x%08X | line\n", table.line);
IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
}
#define EVENT_START_OFFSET (4 * sizeof(u32))
/**
* iwl_print_event_log - Dump error event log to syslog
*
*/
static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
u32 num_events, u32 mode,
int pos, char **buf, size_t bufsz)
{
u32 i;
u32 base; /* SRAM byte address of event log header */
u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
unsigned long reg_flags;
if (num_events == 0)
return pos;
base = priv->device_pointers.log_event_table;
if (priv->ucode_type == IWL_UCODE_INIT) {
if (!base)
base = priv->_agn.init_evtlog_ptr;
} else {
if (!base)
base = priv->_agn.inst_evtlog_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_write32(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_read32(priv, HBUS_TARG_MEM_RDAT);
time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
if (mode == 0) {
/* data, ev */
if (bufsz) {
pos += scnprintf(*buf + pos, bufsz - pos,
"EVT_LOG:0x%08x:%04u\n",
time, ev);
} else {
trace_iwlwifi_dev_ucode_event(priv, 0,
time, ev);
IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
time, ev);
}
} else {
data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
if (bufsz) {
pos += scnprintf(*buf + pos, bufsz - pos,
"EVT_LOGT:%010u:0x%08x:%04u\n",
time, data, ev);
} else {
IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
time, data, ev);
trace_iwlwifi_dev_ucode_event(priv, time,
data, ev);
}
}
}
/* Allow device to power down */
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return pos;
}
/**
* iwl_print_last_event_logs - Dump the newest # of event log to syslog
*/
static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
u32 num_wraps, u32 next_entry,
u32 size, u32 mode,
int pos, char **buf, size_t bufsz)
{
/*
* display the newest DEFAULT_LOG_ENTRIES entries
* i.e the entries just before the next ont that uCode would fill.
*/
if (num_wraps) {
if (next_entry < size) {
pos = iwl_print_event_log(priv,
capacity - (size - next_entry),
size - next_entry, mode,
pos, buf, bufsz);
pos = iwl_print_event_log(priv, 0,
next_entry, mode,
pos, buf, bufsz);
} else
pos = iwl_print_event_log(priv, next_entry - size,
size, mode, pos, buf, bufsz);
} else {
if (next_entry < size) {
pos = iwl_print_event_log(priv, 0, next_entry,
mode, pos, buf, bufsz);
} else {
pos = iwl_print_event_log(priv, next_entry - size,
size, mode, pos, buf, bufsz);
}
}
return pos;
}
#define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
char **buf, bool display)
{
u32 base; /* SRAM byte address of event log header */
u32 capacity; /* event log capacity in # entries */
u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
u32 num_wraps; /* # times uCode wrapped to top of log */
u32 next_entry; /* index of next entry to be written by uCode */
u32 size; /* # entries that we'll print */
u32 logsize;
int pos = 0;
size_t bufsz = 0;
base = priv->device_pointers.log_event_table;
if (priv->ucode_type == IWL_UCODE_INIT) {
logsize = priv->_agn.init_evtlog_size;
if (!base)
base = priv->_agn.init_evtlog_ptr;
} else {
logsize = priv->_agn.inst_evtlog_size;
if (!base)
base = priv->_agn.inst_evtlog_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 == IWL_UCODE_INIT)
? "Init" : "RT");
return -EINVAL;
}
/* event log header */
capacity = iwl_read_targ_mem(priv, base);
mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
if (capacity > logsize) {
IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
capacity, logsize);
capacity = logsize;
}
if (next_entry > logsize) {
IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
next_entry, logsize);
next_entry = logsize;
}
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;
}
/* enable/disable bt channel inhibition */
priv->bt_ch_announce = iwlagn_bt_ch_announce;
#ifdef CONFIG_IWLWIFI_DEBUG
if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
#else
size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
#endif
IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
size);
#ifdef CONFIG_IWLWIFI_DEBUG
if (display) {
if (full_log)
bufsz = capacity * 48;
else
bufsz = size * 48;
*buf = kmalloc(bufsz, GFP_KERNEL);
if (!*buf)
return -ENOMEM;
}
if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
/*
* if uCode has wrapped back to top of log,
* start at the oldest entry,
* i.e the next one that uCode would fill.
*/
if (num_wraps)
pos = iwl_print_event_log(priv, next_entry,
capacity - next_entry, mode,
pos, buf, bufsz);
/* (then/else) start at top of log */
pos = iwl_print_event_log(priv, 0,
next_entry, mode, pos, buf, bufsz);
} else
pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
next_entry, size, mode,
pos, buf, bufsz);
#else
pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
next_entry, size, mode,
pos, buf, bufsz);
#endif
return pos;
}
static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
struct iwl_ct_kill_config cmd;
struct iwl_ct_kill_throttling_config adv_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);
priv->thermal_throttle.ct_kill_toggle = false;
if (priv->cfg->base_params->support_ct_kill_exit) {
adv_cmd.critical_temperature_enter =
cpu_to_le32(priv->hw_params.ct_kill_threshold);
adv_cmd.critical_temperature_exit =
cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
ret = trans_send_cmd_pdu(priv,
REPLY_CT_KILL_CONFIG_CMD,
CMD_SYNC, sizeof(adv_cmd), &adv_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 enter is %d,"
"exit is %d\n",
priv->hw_params.ct_kill_threshold,
priv->hw_params.ct_kill_exit_threshold);
} else {
cmd.critical_temperature_R =
cpu_to_le32(priv->hw_params.ct_kill_threshold);
ret = trans_send_cmd_pdu(priv,
REPLY_CT_KILL_CONFIG_CMD,
CMD_SYNC, 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 int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
{
struct iwl_calib_cfg_cmd calib_cfg_cmd;
struct iwl_host_cmd cmd = {
.id = CALIBRATION_CFG_CMD,
.len = { sizeof(struct iwl_calib_cfg_cmd), },
.data = { &calib_cfg_cmd, },
};
memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
return trans_send_cmd(priv, &cmd);
}
/**
* iwl_alive_start - called after REPLY_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by iwl_init_alive_start()).
*/
int iwl_alive_start(struct iwl_priv *priv)
{
int ret = 0;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
iwl_reset_ict(priv);
IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
/* 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_setup_watchdog(priv);
if (iwl_is_rfkill(priv))
return -ERFKILL;
/* download priority table before any calibration request */
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist) {
/* Configure Bluetooth device coexistence support */
priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
iwlagn_send_advance_bt_config(priv);
priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
iwlagn_send_prio_tbl(priv);
/* FIXME: w/a to force change uCode BT state machine */
ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
if (ret)
return ret;
ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
if (ret)
return ret;
} else {
/*
* default is 2-wire BT coexexistence support
*/
iwl_send_bt_config(priv);
}
if (priv->hw_params.calib_rt_cfg)
iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
ieee80211_wake_queues(priv->hw);
priv->active_rate = IWL_RATES_MASK;
/* Configure Tx antenna selection based on H/W config */
iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
if (iwl_is_associated_ctx(ctx)) {
struct iwl_rxon_cmd *active_rxon =
(struct iwl_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_connection_init_rx_config(priv, tmp);
iwlagn_set_rxon_chain(priv, ctx);
}
iwl_reset_run_time_calib(priv);
set_bit(STATUS_READY, &priv->status);
/* Configure the adapter for unassociated operation */
ret = iwlagn_commit_rxon(priv, ctx);
if (ret)
return ret;
/* At this point, the NIC is initialized and operational */
iwl_rf_kill_ct_config(priv);
IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
return iwl_power_update_mode(priv, true);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv);
static void __iwl_down(struct iwl_priv *priv)
{
int exit_pending;
IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
iwl_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_clear_ucode_stations(priv, NULL);
iwl_dealloc_bcast_stations(priv);
iwl_clear_driver_stations(priv);
/* reset BT coex data */
priv->bt_status = 0;
if (priv->cfg->bt_params)
priv->bt_traffic_load =
priv->cfg->bt_params->bt_init_traffic_load;
else
priv->bt_traffic_load = 0;
priv->bt_full_concurrent = false;
priv->bt_ci_compliance = 0;
/* 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);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
/* Clear out all status bits but a few that are stable across reset */
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;
iwlagn_stop_device(priv);
dev_kfree_skb(priv->beacon_skb);
priv->beacon_skb = NULL;
}
static void iwl_down(struct iwl_priv *priv)
{
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
iwl_cancel_deferred_work(priv);
}
#define HW_READY_TIMEOUT (50)
/* Note: returns poll_bit return value, which is >= 0 if success */
static int iwl_set_hw_ready(struct iwl_priv *priv)
{
int ret;
iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
/* See if we got it */
ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
HW_READY_TIMEOUT);
IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
return ret;
}
/* Note: returns standard 0/-ERROR code */
int iwl_prepare_card_hw(struct iwl_priv *priv)
{
int ret;
IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
ret = iwl_set_hw_ready(priv);
if (ret >= 0)
return 0;
/* If HW is not ready, prepare the conditions to check again */
iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_PREPARE);
ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
if (ret < 0)
return ret;
/* HW should be ready by now, check again. */
ret = iwl_set_hw_ready(priv);
if (ret >= 0)
return 0;
return ret;
}
#define MAX_HW_RESTARTS 5
static int __iwl_up(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
int ret;
lockdep_assert_held(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
return -EIO;
}
for_each_context(priv, ctx) {
ret = iwlagn_alloc_bcast_station(priv, ctx);
if (ret) {
iwl_dealloc_bcast_stations(priv);
return ret;
}
}
ret = iwlagn_run_init_ucode(priv);
if (ret) {
IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
goto error;
}
ret = iwlagn_load_ucode_wait_alive(priv,
&priv->ucode_rt,
IWL_UCODE_REGULAR);
if (ret) {
IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
goto error;
}
ret = iwl_alive_start(priv);
if (ret)
goto error;
return 0;
error:
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl_down(priv);
clear_bit(STATUS_EXIT_PENDING, &priv->status);
IWL_ERR(priv, "Unable to initialize device.\n");
return ret;
}
/*****************************************************************************
*
* Workqueue callbacks
*
*****************************************************************************/
static void iwl_bg_run_time_calib_work(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
run_time_calib_work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status)) {
mutex_unlock(&priv->mutex);
return;
}
if (priv->start_calib) {
iwl_chain_noise_calibration(priv);
iwl_sensitivity_calibration(priv);
}
mutex_unlock(&priv->mutex);
}
static void iwlagn_prepare_restart(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
bool bt_full_concurrent;
u8 bt_ci_compliance;
u8 bt_load;
u8 bt_status;
lockdep_assert_held(&priv->mutex);
for_each_context(priv, ctx)
ctx->vif = NULL;
priv->is_open = 0;
/*
* __iwl_down() will clear the BT status variables,
* which is correct, but when we restart we really
* want to keep them so restore them afterwards.
*
* The restart process will later pick them up and
* re-configure the hw when we reconfigure the BT
* command.
*/
bt_full_concurrent = priv->bt_full_concurrent;
bt_ci_compliance = priv->bt_ci_compliance;
bt_load = priv->bt_traffic_load;
bt_status = priv->bt_status;
__iwl_down(priv);
priv->bt_full_concurrent = bt_full_concurrent;
priv->bt_ci_compliance = bt_ci_compliance;
priv->bt_traffic_load = bt_load;
priv->bt_status = bt_status;
}
static void iwl_bg_restart(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
mutex_lock(&priv->mutex);
iwlagn_prepare_restart(priv);
mutex_unlock(&priv->mutex);
iwl_cancel_deferred_work(priv);
ieee80211_restart_hw(priv->hw);
} else {
WARN_ON(1);
}
}
static void iwl_bg_rx_replenish(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, rx_replenish);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwlagn_rx_replenish(priv);
mutex_unlock(&priv->mutex);
}
static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type,
unsigned int wait)
{
struct iwl_priv *priv = hw->priv;
int ret;
/* Not supported if we don't have PAN */
if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
ret = -EOPNOTSUPP;
goto free;
}
/* Not supported on pre-P2P firmware */
if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
BIT(NL80211_IFTYPE_P2P_CLIENT))) {
ret = -EOPNOTSUPP;
goto free;
}
mutex_lock(&priv->mutex);
if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
/*
* If the PAN context is free, use the normal
* way of doing remain-on-channel offload + TX.
*/
ret = 1;
goto out;
}
/* TODO: queue up if scanning? */
if (test_bit(STATUS_SCANNING, &priv->status) ||
priv->_agn.offchan_tx_skb) {
ret = -EBUSY;
goto out;
}
/*
* max_scan_ie_len doesn't include the blank SSID or the header,
* so need to add that again here.
*/
if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
ret = -ENOBUFS;
goto out;
}
priv->_agn.offchan_tx_skb = skb;
priv->_agn.offchan_tx_timeout = wait;
priv->_agn.offchan_tx_chan = chan;
ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
IWL_SCAN_OFFCH_TX, chan->band);
if (ret)
priv->_agn.offchan_tx_skb = NULL;
out:
mutex_unlock(&priv->mutex);
free:
if (ret < 0)
kfree_skb(skb);
return ret;
}
static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
int ret;
mutex_lock(&priv->mutex);
if (!priv->_agn.offchan_tx_skb) {
ret = -EINVAL;
goto unlock;
}
priv->_agn.offchan_tx_skb = NULL;
ret = iwl_scan_cancel_timeout(priv, 200);
if (ret)
ret = -EIO;
unlock:
mutex_unlock(&priv->mutex);
return ret;
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
{
.max = 1,
.types = BIT(NL80211_IFTYPE_STATION),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_AP),
},
};
static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
{
.max = 2,
.types = BIT(NL80211_IFTYPE_STATION),
},
};
static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
{
.max = 1,
.types = BIT(NL80211_IFTYPE_STATION),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_P2P_GO) |
BIT(NL80211_IFTYPE_AP),
},
};
static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
{
.max = 2,
.types = BIT(NL80211_IFTYPE_STATION),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_P2P_CLIENT),
},
};
static const struct ieee80211_iface_combination
iwlagn_iface_combinations_dualmode[] = {
{ .num_different_channels = 1,
.max_interfaces = 2,
.beacon_int_infra_match = true,
.limits = iwlagn_sta_ap_limits,
.n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
},
{ .num_different_channels = 1,
.max_interfaces = 2,
.limits = iwlagn_2sta_limits,
.n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
},
};
static const struct ieee80211_iface_combination
iwlagn_iface_combinations_p2p[] = {
{ .num_different_channels = 1,
.max_interfaces = 2,
.beacon_int_infra_match = true,
.limits = iwlagn_p2p_sta_go_limits,
.n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
},
{ .num_different_channels = 1,
.max_interfaces = 2,
.limits = iwlagn_p2p_2sta_limits,
.n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
},
};
/*
* Not a mac80211 entry point function, but it fits in with all the
* other mac80211 functions grouped here.
*/
static int iwl_mac_setup_register(struct iwl_priv *priv,
struct iwlagn_ucode_capabilities *capa)
{
int ret;
struct ieee80211_hw *hw = priv->hw;
struct iwl_rxon_context *ctx;
hw->rate_control_algorithm = "iwl-agn-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;
hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
hw->flags |= IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
IEEE80211_HW_SUPPORTS_STATIC_SMPS;
if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
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;
}
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
hw->wiphy->n_iface_combinations =
ARRAY_SIZE(iwlagn_iface_combinations_p2p);
} else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
hw->wiphy->n_iface_combinations =
ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
}
hw->wiphy->max_remain_on_channel_duration = 1000;
hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
WIPHY_FLAG_DISABLE_BEACON_HINTS |
WIPHY_FLAG_IBSS_RSN;
if (iwlagn_mod_params.power_save)
hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
else
hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
/* we create the 802.11 header and a zero-length SSID element */
hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
/* Default value; 4 EDCA QOS priorities */
hw->queues = 4;
hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&priv->bands[IEEE80211_BAND_2GHZ];
if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&priv->bands[IEEE80211_BAND_5GHZ];
iwl_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;
}
static int iwlagn_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211(priv, "enter\n");
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
ret = __iwl_up(priv);
mutex_unlock(&priv->mutex);
if (ret)
return ret;
IWL_DEBUG_INFO(priv, "Start UP work done.\n");
/* Now we should be done, and the READY bit should be set. */
if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
ret = -EIO;
iwlagn_led_enable(priv);
priv->is_open = 1;
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
}
static void iwlagn_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;
iwl_down(priv);
flush_workqueue(priv->workqueue);
/* User space software may expect getting rfkill changes
* even if interface is down */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
iwl_enable_rfkill_int(priv);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MACDUMP(priv, "enter\n");
IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
if (iwlagn_tx_skb(priv, skb))
dev_kfree_skb_any(skb);
IWL_DEBUG_MACDUMP(priv, "leave\n");
}
static void iwlagn_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");
iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
iv32, phase1key);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static int iwlagn_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 (iwlagn_mod_params.sw_crypto) {
IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
/*
* To support IBSS RSN, don't program group keys in IBSS, the
* hardware will then not attempt to decrypt the frames.
*/
if (vif->type == NL80211_IFTYPE_ADHOC &&
!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
return -EOPNOTSUPP;
sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
if (sta_id == IWL_INVALID_STATION)
return -EINVAL;
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
/*
* If we are getting WEP group key and we didn't receive any key mapping
* so far, we are in legacy wep mode (group key only), otherwise we are
* in 1X mode.
* In legacy wep mode, we use another host command to the uCode.
*/
if ((key->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 = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
else
ret = iwl_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 = iwl_remove_default_wep_key(priv, ctx, key);
else
ret = iwl_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;
}
static int iwlagn_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;
struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
sta->addr, tid);
if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
return -EACCES;
mutex_lock(&priv->mutex);
switch (action) {
case IEEE80211_AMPDU_RX_START:
IWL_DEBUG_HT(priv, "start Rx\n");
ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
break;
case IEEE80211_AMPDU_RX_STOP:
IWL_DEBUG_HT(priv, "stop Rx\n");
ret = iwl_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 = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
if (ret == 0) {
priv->_agn.agg_tids_count++;
IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
priv->_agn.agg_tids_count);
}
break;
case IEEE80211_AMPDU_TX_STOP:
IWL_DEBUG_HT(priv, "stop Tx\n");
ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
priv->_agn.agg_tids_count--;
IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
priv->_agn.agg_tids_count);
}
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
ret = 0;
if (priv->cfg->ht_params &&
priv->cfg->ht_params->use_rts_for_aggregation) {
/*
* switch off RTS/CTS if it was previously enabled
*/
sta_priv->lq_sta.lq.general_params.flags &=
~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
&sta_priv->lq_sta.lq, CMD_ASYNC, false);
}
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
/*
* If the limit is 0, then it wasn't initialised yet,
* use the default. We can do that since we take the
* minimum below, and we don't want to go above our
* default due to hardware restrictions.
*/
if (sta_priv->max_agg_bufsize == 0)
sta_priv->max_agg_bufsize =
LINK_QUAL_AGG_FRAME_LIMIT_DEF;
/*
* Even though in theory the peer could have different
* aggregation reorder buffer sizes for different sessions,
* our ucode doesn't allow for that and has a global limit
* for each station. Therefore, use the minimum of all the
* aggregation sessions and our default value.
*/
sta_priv->max_agg_bufsize =
min(sta_priv->max_agg_bufsize, buf_size);
if (priv->cfg->ht_params &&
priv->cfg->ht_params->use_rts_for_aggregation) {
/*
* switch to RTS/CTS if it is the prefer protection
* method for HT traffic
*/
sta_priv->lq_sta.lq.general_params.flags |=
LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
}
sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
sta_priv->max_agg_bufsize;
iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
&sta_priv->lq_sta.lq, CMD_ASYNC, false);
IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
sta->addr, tid);
ret = 0;
break;
}
mutex_unlock(&priv->mutex);
return ret;
}
static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_priv *priv = hw->priv;
struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
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);
if (vif->type == NL80211_IFTYPE_AP)
sta_priv->client = true;
ret = iwl_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);
iwl_rs_rate_init(priv, sta, sta_id);
mutex_unlock(&priv->mutex);
return 0;
}
static void iwlagn_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;
/*
* MULTI-FIXME
* When we add support for multiple interfaces, we need to
* revisit this. The channel switch command in the device
* only affects the BSS context, but what does that really
* mean? And what if we get a CSA on the second interface?
* This needs a lot of work.
*/
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
u16 ch;
IWL_DEBUG_MAC80211(priv, "enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_rfkill(priv))
goto out;
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status) ||
test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
goto out;
if (!iwl_is_associated_ctx(ctx))
goto out;
if (!priv->cfg->ops->lib->set_channel_switch)
goto out;
ch = channel->hw_value;
if (le16_to_cpu(ctx->active.channel) == ch)
goto out;
ch_info = iwl_get_channel_info(priv, channel->band, ch);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_MAC80211(priv, "invalid channel\n");
goto out;
}
spin_lock_irq(&priv->lock);
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_set_rxon_channel(priv, channel, ctx);
iwl_set_rxon_ht(priv, ht_conf);
iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
spin_unlock_irq(&priv->lock);
iwl_set_rate(priv);
/*
* at this point, staging_rxon has the
* configuration for channel switch
*/
set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
priv->switch_channel = cpu_to_le16(ch);
if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
priv->switch_channel = 0;
ieee80211_chswitch_done(ctx->vif, false);
}
out:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static void iwlagn_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_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;
}
static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
{
struct iwl_priv *priv = hw->priv;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "enter\n");
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
goto done;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
goto done;
}
/*
* mac80211 will not push any more frames for transmit
* until the flush is completed
*/
if (drop) {
IWL_DEBUG_MAC80211(priv, "send flush command\n");
if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
IWL_ERR(priv, "flush request fail\n");
goto done;
}
}
IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
iwlagn_wait_tx_queue_empty(priv);
done:
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static void iwlagn_disable_roc(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
lockdep_assert_held(&priv->mutex);
if (!ctx->is_active)
return;
ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_set_rxon_channel(priv, chan, ctx);
iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
priv->_agn.hw_roc_channel = NULL;
iwlagn_commit_rxon(priv, ctx);
ctx->is_active = false;
}
static void iwlagn_bg_roc_done(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
_agn.hw_roc_work.work);
mutex_lock(&priv->mutex);
ieee80211_remain_on_channel_expired(priv->hw);
iwlagn_disable_roc(priv);
mutex_unlock(&priv->mutex);
}
static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
struct ieee80211_channel *channel,
enum nl80211_channel_type channel_type,
int duration)
{
struct iwl_priv *priv = hw->priv;
int err = 0;
if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
return -EOPNOTSUPP;
if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
BIT(NL80211_IFTYPE_P2P_CLIENT)))
return -EOPNOTSUPP;
mutex_lock(&priv->mutex);
if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
test_bit(STATUS_SCAN_HW, &priv->status)) {
err = -EBUSY;
goto out;
}
priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
priv->_agn.hw_roc_channel = channel;
priv->_agn.hw_roc_chantype = channel_type;
priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
msecs_to_jiffies(duration + 20));
msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
ieee80211_ready_on_channel(priv->hw);
out:
mutex_unlock(&priv->mutex);
return err;
}
static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
return -EOPNOTSUPP;
cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
mutex_lock(&priv->mutex);
iwlagn_disable_roc(priv);
mutex_unlock(&priv->mutex);
return 0;
}
/*****************************************************************************
*
* driver setup and teardown
*
*****************************************************************************/
static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
priv->workqueue = create_singlethread_workqueue(DRV_NAME);
init_waitqueue_head(&priv->wait_command_queue);
INIT_WORK(&priv->restart, iwl_bg_restart);
INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
iwl_setup_scan_deferred_work(priv);
if (priv->cfg->ops->lib->setup_deferred_work)
priv->cfg->ops->lib->setup_deferred_work(priv);
init_timer(&priv->statistics_periodic);
priv->statistics_periodic.data = (unsigned long)priv;
priv->statistics_periodic.function = iwl_bg_statistics_periodic;
init_timer(&priv->ucode_trace);
priv->ucode_trace.data = (unsigned long)priv;
priv->ucode_trace.function = iwl_bg_ucode_trace;
init_timer(&priv->watchdog);
priv->watchdog.data = (unsigned long)priv;
priv->watchdog.function = iwl_bg_watchdog;
tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
iwl_irq_tasklet, (unsigned long)priv);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
if (priv->cfg->ops->lib->cancel_deferred_work)
priv->cfg->ops->lib->cancel_deferred_work(priv);
cancel_work_sync(&priv->run_time_calib_work);
cancel_work_sync(&priv->beacon_update);
iwl_cancel_scan_deferred_work(priv);
cancel_work_sync(&priv->bt_full_concurrency);
cancel_work_sync(&priv->bt_runtime_config);
del_timer_sync(&priv->statistics_periodic);
del_timer_sync(&priv->ucode_trace);
}
static void iwl_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
rates[i].bitrate = iwl_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on indexes */
rates[i].hw_value_short = i;
rates[i].flags = 0;
if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |=
(iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
static int iwl_init_drv(struct iwl_priv *priv)
{
int ret;
spin_lock_init(&priv->sta_lock);
spin_lock_init(&priv->hcmd_lock);
mutex_init(&priv->mutex);
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->band = IEEE80211_BAND_2GHZ;
priv->iw_mode = NL80211_IFTYPE_STATION;
priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
priv->_agn.agg_tids_count = 0;
/* initialize force reset */
priv->force_reset[IWL_RF_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_RF_RESET;
priv->force_reset[IWL_FW_RESET].reset_duration =
IWL_DELAY_NEXT_FORCE_FW_RELOAD;
priv->rx_statistics_jiffies = jiffies;
/* Choose which receivers/antennas to use */
iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
iwl_init_scan_params(priv);
/* init bt coex */
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist) {
priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
priv->bt_duration = BT_DURATION_LIMIT_DEF;
priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
}
ret = iwl_init_channel_map(priv);
if (ret) {
IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
goto err;
}
ret = iwlcore_init_geos(priv);
if (ret) {
IWL_ERR(priv, "initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
iwl_init_hw_rates(priv, priv->ieee_rates);
return 0;
err_free_channel_map:
iwl_free_channel_map(priv);
err:
return ret;
}
static void iwl_uninit_drv(struct iwl_priv *priv)
{
iwl_calib_free_results(priv);
iwlcore_free_geos(priv);
iwl_free_channel_map(priv);
kfree(priv->scan_cmd);
kfree(priv->beacon_cmd);
}
struct ieee80211_ops iwlagn_hw_ops = {
.tx = iwlagn_mac_tx,
.start = iwlagn_mac_start,
.stop = iwlagn_mac_stop,
.add_interface = iwl_mac_add_interface,
.remove_interface = iwl_mac_remove_interface,
.change_interface = iwl_mac_change_interface,
.config = iwlagn_mac_config,
.configure_filter = iwlagn_configure_filter,
.set_key = iwlagn_mac_set_key,
.update_tkip_key = iwlagn_mac_update_tkip_key,
.conf_tx = iwl_mac_conf_tx,
.bss_info_changed = iwlagn_bss_info_changed,
.ampdu_action = iwlagn_mac_ampdu_action,
.hw_scan = iwl_mac_hw_scan,
.sta_notify = iwlagn_mac_sta_notify,
.sta_add = iwlagn_mac_sta_add,
.sta_remove = iwl_mac_sta_remove,
.channel_switch = iwlagn_mac_channel_switch,
.flush = iwlagn_mac_flush,
.tx_last_beacon = iwl_mac_tx_last_beacon,
.remain_on_channel = iwl_mac_remain_on_channel,
.cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
.offchannel_tx = iwl_mac_offchannel_tx,
.offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
};
static u32 iwl_hw_detect(struct iwl_priv *priv)
{
return iwl_read32(priv, CSR_HW_REV);
}
static int iwl_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 (iwlagn_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 (iwlagn_mod_params.disable_11n)
priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
/* Device-specific setup */
return priv->cfg->ops->lib->set_hw_params(priv);
}
static const u8 iwlagn_bss_ac_to_fifo[] = {
IWL_TX_FIFO_VO,
IWL_TX_FIFO_VI,
IWL_TX_FIFO_BE,
IWL_TX_FIFO_BK,
};
static const u8 iwlagn_bss_ac_to_queue[] = {
0, 1, 2, 3,
};
static const u8 iwlagn_pan_ac_to_fifo[] = {
IWL_TX_FIFO_VO_IPAN,
IWL_TX_FIFO_VI_IPAN,
IWL_TX_FIFO_BE_IPAN,
IWL_TX_FIFO_BK_IPAN,
};
static const u8 iwlagn_pan_ac_to_queue[] = {
7, 6, 5, 4,
};
/* This function both allocates and initializes hw and priv. */
static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
{
struct iwl_priv *priv;
/* mac80211 allocates memory for this device instance, including
* space for this driver's private structure */
struct ieee80211_hw *hw;
hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
if (hw == NULL) {
pr_err("%s: Can not allocate network device\n",
cfg->name);
goto out;
}
priv = hw->priv;
priv->hw = hw;
out:
return hw;
}
static void iwl_init_context(struct iwl_priv *priv)
{
int i;
/*
* 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 = iwlagn_bss_ac_to_fifo;
priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_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;
priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
REPLY_WIPAN_RXON_TIMING;
priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
REPLY_WIPAN_RXON_ASSOC;
priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
#ifdef CONFIG_IWL_P2P
priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
#endif
priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
}
int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
struct iwl_cfg *cfg)
{
int err = 0;
struct iwl_priv *priv;
struct ieee80211_hw *hw;
u16 num_mac;
u32 hw_rev;
/************************
* 1. Allocating HW data
************************/
hw = iwl_alloc_all(cfg);
if (!hw) {
err = -ENOMEM;
goto out;
}
priv = hw->priv;
priv->bus.priv = priv;
priv->bus.bus_specific = bus_specific;
priv->bus.ops = bus_ops;
priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
priv->bus.ops->set_drv_data(&priv->bus, priv);
priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
iwl_trans_register(&priv->trans);
/* At this point both hw and priv are allocated. */
SET_IEEE80211_DEV(hw, priv->bus.dev);
IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
priv->cfg = cfg;
priv->inta_mask = CSR_INI_SET_MASK;
/* is antenna coupling more than 35dB ? */
priv->bt_ant_couple_ok =
(iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
true : false;
/* enable/disable bt channel inhibition */
priv->bt_ch_announce = iwlagn_bt_ch_announce;
IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
(priv->bt_ch_announce) ? "On" : "Off");
if (iwl_alloc_traffic_mem(priv))
IWL_ERR(priv, "Not enough memory to generate traffic log\n");
/* 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);
/***********************
* 3. Read REV register
***********************/
hw_rev = iwl_hw_detect(priv);
IWL_INFO(priv, "Detected %s, REV=0x%X\n",
priv->cfg->name, hw_rev);
if (iwl_prepare_card_hw(priv)) {
err = -EIO;
IWL_WARN(priv, "Failed, HW not ready\n");
goto out_free_traffic_mem;
}
/*****************
* 4. Read EEPROM
*****************/
/* Read the EEPROM */
err = iwl_eeprom_init(priv, hw_rev);
if (err) {
IWL_ERR(priv, "Unable to init EEPROM\n");
goto out_free_traffic_mem;
}
err = iwl_eeprom_check_version(priv);
if (err)
goto out_free_eeprom;
err = iwl_eeprom_check_sku(priv);
if (err)
goto out_free_eeprom;
/* extract MAC Address */
iwl_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;
num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
if (num_mac > 1) {
memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
ETH_ALEN);
priv->addresses[1].addr[5]++;
priv->hw->wiphy->n_addresses++;
}
/* initialize all valid contexts */
iwl_init_context(priv);
/************************
* 5. Setup HW constants
************************/
if (iwl_set_hw_params(priv)) {
err = -ENOENT;
IWL_ERR(priv, "failed to set hw parameters\n");
goto out_free_eeprom;
}
/*******************
* 6. Setup priv
*******************/
err = iwl_init_drv(priv);
if (err)
goto out_free_eeprom;
/* At this point both hw and priv are initialized. */
/********************
* 7. Setup services
********************/
iwl_alloc_isr_ict(priv);
err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
DRV_NAME, priv);
if (err) {
IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
goto out_uninit_drv;
}
iwl_setup_deferred_work(priv);
iwl_setup_rx_handlers(priv);
iwl_testmode_init(priv);
/*********************************************
* 8. Enable interrupts
*********************************************/
iwl_enable_rfkill_int(priv);
/* If platform's RF_KILL switch is NOT set to KILL */
if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(STATUS_RF_KILL_HW, &priv->status);
else
set_bit(STATUS_RF_KILL_HW, &priv->status);
wiphy_rfkill_set_hw_state(priv->hw->wiphy,
test_bit(STATUS_RF_KILL_HW, &priv->status));
iwl_power_initialize(priv);
iwl_tt_initialize(priv);
init_completion(&priv->_agn.firmware_loading_complete);
err = iwl_request_firmware(priv, true);
if (err)
goto out_destroy_workqueue;
return 0;
out_destroy_workqueue:
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
free_irq(priv->bus.irq, priv);
iwl_free_isr_ict(priv);
out_uninit_drv:
iwl_uninit_drv(priv);
out_free_eeprom:
iwl_eeprom_free(priv);
out_free_traffic_mem:
iwl_free_traffic_mem(priv);
ieee80211_free_hw(priv->hw);
out:
return err;
}
void __devexit iwl_remove(struct iwl_priv * priv)
{
unsigned long flags;
wait_for_completion(&priv->_agn.firmware_loading_complete);
IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
iwl_dbgfs_unregister(priv);
sysfs_remove_group(&priv->bus.dev->kobj,
&iwl_attribute_group);
/* ieee80211_unregister_hw call wil cause iwl_mac_stop to
* to be called and iwl_down since we are removing the device
* we need to set STATUS_EXIT_PENDING bit.
*/
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl_testmode_cleanup(priv);
iwl_leds_exit(priv);
if (priv->mac80211_registered) {
ieee80211_unregister_hw(priv->hw);
priv->mac80211_registered = 0;
}
/* Reset to low power before unloading driver. */
iwl_apm_stop(priv);
iwl_tt_exit(priv);
/* make sure we flush any pending irq or
* tasklet for the driver
*/
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
iwl_dealloc_ucode(priv);
trans_rx_free(priv);
trans_tx_free(priv);
iwl_eeprom_free(priv);
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
iwl_free_traffic_mem(priv);
free_irq(priv->bus.irq, priv);
priv->bus.ops->set_drv_data(&priv->bus, NULL);
iwl_uninit_drv(priv);
iwl_free_isr_ict(priv);
dev_kfree_skb(priv->beacon_skb);
ieee80211_free_hw(priv->hw);
}
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
static int __init iwl_init(void)
{
int ret;
pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
pr_info(DRV_COPYRIGHT "\n");
ret = iwlagn_rate_control_register();
if (ret) {
pr_err("Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = iwl_pci_register_driver();
if (ret)
goto error_register;
return ret;
error_register:
iwlagn_rate_control_unregister();
return ret;
}
static void __exit iwl_exit(void)
{
iwl_pci_unregister_driver();
iwlagn_rate_control_unregister();
}
module_exit(iwl_exit);
module_init(iwl_init);
#ifdef CONFIG_IWLWIFI_DEBUG
module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif
module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
MODULE_PARM_DESC(queues_num, "number of hw queues.");
module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
S_IRUGO);
MODULE_PARM_DESC(ucode_alternative,
"specify ucode alternative to use from ucode file");
module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
MODULE_PARM_DESC(antenna_coupling,
"specify antenna coupling in dB (defualt: 0 dB)");
module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
MODULE_PARM_DESC(bt_ch_inhibition,
"Disable BT channel inhibition (default: enable)");
module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
MODULE_PARM_DESC(wd_disable,
"Disable stuck queue watchdog timer (default: 0 [enabled])");
/*
* set bt_coex_active to true, uCode will do kill/defer
* every time the priority line is asserted (BT is sending signals on the
* priority line in the PCIx).
* set bt_coex_active to false, uCode will ignore the BT activity and
* perform the normal operation
*
* User might experience transmit issue on some platform due to WiFi/BT
* co-exist problem. The possible behaviors are:
* Able to scan and finding all the available AP
* Not able to associate with any AP
* On those platforms, WiFi communication can be restored by set
* "bt_coex_active" module parameter to "false"
*
* default: bt_coex_active = true (BT_COEX_ENABLE)
*/
module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
bool, S_IRUGO);
MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "0=system default, "
"1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
module_param_named(power_save, iwlagn_mod_params.power_save,
bool, S_IRUGO);
MODULE_PARM_DESC(power_save,
"enable WiFi power management (default: disable)");
module_param_named(power_level, iwlagn_mod_params.power_level,
int, S_IRUGO);
MODULE_PARM_DESC(power_level,
"default power save level (range from 1 - 5, default: 1)");
/*
* For now, keep using power level 1 instead of automatically
* adjusting ...
*/
module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
bool, S_IRUGO);
MODULE_PARM_DESC(no_sleep_autoadjust,
"don't automatically adjust sleep level "
"according to maximum network latency (default: true)");
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