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linux/drivers/net/wireless/iwlwifi/iwl-agn.c
Winkler, Tomas 8f5c87dcf6 iwlwifi: move host command check function into separate file 
This patch moves iwl_check_rxon_cmd into iwl-agn-hcmd-check.c
This function compiled out in none debugging or non development
mode and more. We haven't decided which one yet hence preserving the
current 'always compile' state.
More functions will be added to the file namely for checking TX and LQ
commands.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-12-05 09:35:51 -05:00

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114 KiB
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/******************************************************************************
*
* Copyright(c) 2003 - 2008 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:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.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-calib.h"
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
* NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif
#define DRV_VERSION IWLWIFI_VERSION VD VS
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
MODULE_ALIAS("iwl4965");
/*************** STATION TABLE MANAGEMENT ****
* mac80211 should be examined to determine if sta_info is duplicating
* the functionality provided here
*/
/**************************************************************/
static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
if (hw_decrypt)
rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
else
rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
}
/**
* iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
* If the RXON structure is changing enough to require a new tune,
* or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
* a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
static int iwl_full_rxon_required(struct iwl_priv *priv)
{
/* These items are only settable from the full RXON command */
if (!(iwl_is_associated(priv)) ||
compare_ether_addr(priv->staging_rxon.bssid_addr,
priv->active_rxon.bssid_addr) ||
compare_ether_addr(priv->staging_rxon.node_addr,
priv->active_rxon.node_addr) ||
compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
priv->active_rxon.wlap_bssid_addr) ||
(priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
(priv->staging_rxon.channel != priv->active_rxon.channel) ||
(priv->staging_rxon.air_propagation !=
priv->active_rxon.air_propagation) ||
(priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
(priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
(priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
return 1;
/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
* be updated with the RXON_ASSOC command -- however only some
* flag transitions are allowed using RXON_ASSOC */
/* Check if we are not switching bands */
if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
(priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
return 1;
/* Check if we are switching association toggle */
if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
return 1;
return 0;
}
/**
* iwl_commit_rxon - commit staging_rxon to hardware
*
* The RXON command in staging_rxon is committed to the hardware and
* the active_rxon structure is updated with the new data. This
* function correctly transitions out of the RXON_ASSOC_MSK state if
* a HW tune is required based on the RXON structure changes.
*/
static int iwl_commit_rxon(struct iwl_priv *priv)
{
/* cast away the const for active_rxon in this function */
struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
int ret;
bool new_assoc =
!!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
if (!iwl_is_alive(priv))
return -EBUSY;
/* always get timestamp with Rx frame */
priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
/* allow CTS-to-self if possible. this is relevant only for
* 5000, but will not damage 4965 */
priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
ret = iwl_agn_check_rxon_cmd(&priv->staging_rxon);
if (ret) {
IWL_ERROR("Invalid RXON configuration. Not committing.\n");
return -EINVAL;
}
/* If we don't need to send a full RXON, we can use
* iwl_rxon_assoc_cmd which is used to reconfigure filter
* and other flags for the current radio configuration. */
if (!iwl_full_rxon_required(priv)) {
ret = iwl_send_rxon_assoc(priv);
if (ret) {
IWL_ERROR("Error setting RXON_ASSOC (%d)\n", ret);
return ret;
}
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
return 0;
}
/* station table will be cleared */
priv->assoc_station_added = 0;
/* If we are currently associated and the new config requires
* an RXON_ASSOC and the new config wants the associated mask enabled,
* we must clear the associated from the active configuration
* before we apply the new config */
if (iwl_is_associated(priv) && new_assoc) {
IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
sizeof(struct iwl_rxon_cmd),
&priv->active_rxon);
/* If the mask clearing failed then we set
* active_rxon back to what it was previously */
if (ret) {
active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
IWL_ERROR("Error clearing ASSOC_MSK (%d)\n", ret);
return ret;
}
}
IWL_DEBUG_INFO("Sending RXON\n"
"* with%s RXON_FILTER_ASSOC_MSK\n"
"* channel = %d\n"
"* bssid = %pM\n",
(new_assoc ? "" : "out"),
le16_to_cpu(priv->staging_rxon.channel),
priv->staging_rxon.bssid_addr);
iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
/* Apply the new configuration
* RXON unassoc clears the station table in uCode, send it before
* we add the bcast station. If assoc bit is set, we will send RXON
* after having added the bcast and bssid station.
*/
if (!new_assoc) {
ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
if (ret) {
IWL_ERROR("Error setting new RXON (%d)\n", ret);
return ret;
}
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
}
iwl_clear_stations_table(priv);
if (!priv->error_recovering)
priv->start_calib = 0;
/* Add the broadcast address so we can send broadcast frames */
if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
IWL_INVALID_STATION) {
IWL_ERROR("Error adding BROADCAST address for transmit.\n");
return -EIO;
}
/* If we have set the ASSOC_MSK and we are in BSS mode then
* add the IWL_AP_ID to the station rate table */
if (new_assoc) {
if (priv->iw_mode == NL80211_IFTYPE_STATION) {
ret = iwl_rxon_add_station(priv,
priv->active_rxon.bssid_addr, 1);
if (ret == IWL_INVALID_STATION) {
IWL_ERROR("Error adding AP address for TX.\n");
return -EIO;
}
priv->assoc_station_added = 1;
if (priv->default_wep_key &&
iwl_send_static_wepkey_cmd(priv, 0))
IWL_ERROR("Could not send WEP static key.\n");
}
/* Apply the new configuration
* RXON assoc doesn't clear the station table in uCode,
*/
ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
if (ret) {
IWL_ERROR("Error setting new RXON (%d)\n", ret);
return ret;
}
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
}
iwl_init_sensitivity(priv);
/* If we issue a new RXON command which required a tune then we must
* send a new TXPOWER command or we won't be able to Tx any frames */
ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
if (ret) {
IWL_ERROR("Error sending TX power (%d)\n", ret);
return ret;
}
return 0;
}
void iwl_update_chain_flags(struct iwl_priv *priv)
{
iwl_set_rxon_chain(priv);
iwl_commit_rxon(priv);
}
static int iwl_send_bt_config(struct iwl_priv *priv)
{
struct iwl4965_bt_cmd bt_cmd = {
.flags = 3,
.lead_time = 0xAA,
.max_kill = 1,
.kill_ack_mask = 0,
.kill_cts_mask = 0,
};
return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
sizeof(struct iwl4965_bt_cmd), &bt_cmd);
}
static void iwl_clear_free_frames(struct iwl_priv *priv)
{
struct list_head *element;
IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
priv->frames_count);
while (!list_empty(&priv->free_frames)) {
element = priv->free_frames.next;
list_del(element);
kfree(list_entry(element, struct iwl_frame, list));
priv->frames_count--;
}
if (priv->frames_count) {
IWL_WARNING("%d frames still in use. Did we lose one?\n",
priv->frames_count);
priv->frames_count = 0;
}
}
static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
{
struct iwl_frame *frame;
struct list_head *element;
if (list_empty(&priv->free_frames)) {
frame = kzalloc(sizeof(*frame), GFP_KERNEL);
if (!frame) {
IWL_ERROR("Could not allocate frame!\n");
return NULL;
}
priv->frames_count++;
return frame;
}
element = priv->free_frames.next;
list_del(element);
return list_entry(element, struct iwl_frame, list);
}
static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
{
memset(frame, 0, sizeof(*frame));
list_add(&frame->list, &priv->free_frames);
}
static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
struct ieee80211_hdr *hdr,
const u8 *dest, int left)
{
if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
(priv->iw_mode != NL80211_IFTYPE_AP)))
return 0;
if (priv->ibss_beacon->len > left)
return 0;
memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
return priv->ibss_beacon->len;
}
static u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
{
int i;
int rate_mask;
/* Set rate mask*/
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
else
rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
/* Find lowest valid rate */
for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
i = iwl_rates[i].next_ieee) {
if (rate_mask & (1 << i))
return iwl_rates[i].plcp;
}
/* No valid rate was found. Assign the lowest one */
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
return IWL_RATE_1M_PLCP;
else
return IWL_RATE_6M_PLCP;
}
static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
struct iwl_frame *frame, u8 rate)
{
struct iwl_tx_beacon_cmd *tx_beacon_cmd;
unsigned int frame_size;
tx_beacon_cmd = &frame->u.beacon;
memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
iwl_bcast_addr,
sizeof(frame->u) - sizeof(*tx_beacon_cmd));
BUG_ON(frame_size > MAX_MPDU_SIZE);
tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
tx_beacon_cmd->tx.rate_n_flags =
iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
else
tx_beacon_cmd->tx.rate_n_flags =
iwl_hw_set_rate_n_flags(rate, 0);
tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
TX_CMD_FLG_TSF_MSK |
TX_CMD_FLG_STA_RATE_MSK;
return sizeof(*tx_beacon_cmd) + frame_size;
}
static int iwl_send_beacon_cmd(struct iwl_priv *priv)
{
struct iwl_frame *frame;
unsigned int frame_size;
int rc;
u8 rate;
frame = iwl_get_free_frame(priv);
if (!frame) {
IWL_ERROR("Could not obtain free frame buffer for beacon "
"command.\n");
return -ENOMEM;
}
rate = iwl_rate_get_lowest_plcp(priv);
frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
&frame->u.cmd[0]);
iwl_free_frame(priv, frame);
return rc;
}
/******************************************************************************
*
* Misc. internal state and helper functions
*
******************************************************************************/
static void iwl_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_sta_ht_cap *ht_conf;
struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
struct ieee80211_sta *sta;
IWL_DEBUG_MAC80211("enter: \n");
if (!iwl_conf->is_ht)
return;
/*
* It is totally wrong to base global information on something
* that is valid only when associated, alas, this driver works
* that way and I don't know how to fix it.
*/
rcu_read_lock();
sta = ieee80211_find_sta(priv->hw, priv->bssid);
if (!sta) {
rcu_read_unlock();
return;
}
ht_conf = &sta->ht_cap;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
iwl_conf->max_amsdu_size =
!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
iwl_conf->supported_chan_width =
!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
iwl_conf->extension_chan_offset = bss_conf->ht.secondary_channel_offset;
/* If no above or below channel supplied disable FAT channel */
if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW) {
iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
iwl_conf->supported_chan_width = 0;
}
iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
iwl_conf->tx_chan_width = bss_conf->ht.width_40_ok;
iwl_conf->ht_protection =
bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
iwl_conf->non_GF_STA_present =
!!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
rcu_read_unlock();
IWL_DEBUG_MAC80211("leave\n");
}
/*
* QoS support
*/
static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!priv->qos_data.qos_enable)
return;
priv->qos_data.def_qos_parm.qos_flags = 0;
if (priv->qos_data.qos_cap.q_AP.queue_request &&
!priv->qos_data.qos_cap.q_AP.txop_request)
priv->qos_data.def_qos_parm.qos_flags |=
QOS_PARAM_FLG_TXOP_TYPE_MSK;
if (priv->qos_data.qos_active)
priv->qos_data.def_qos_parm.qos_flags |=
QOS_PARAM_FLG_UPDATE_EDCA_MSK;
if (priv->current_ht_config.is_ht)
priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
if (force || iwl_is_associated(priv)) {
IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
priv->qos_data.qos_active,
priv->qos_data.def_qos_parm.qos_flags);
iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
sizeof(struct iwl_qosparam_cmd),
&priv->qos_data.def_qos_parm, NULL);
}
}
#define MAX_UCODE_BEACON_INTERVAL 4096
static u16 iwl_adjust_beacon_interval(u16 beacon_val)
{
u16 new_val = 0;
u16 beacon_factor = 0;
beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
/ MAX_UCODE_BEACON_INTERVAL;
new_val = beacon_val / beacon_factor;
return new_val;
}
static void iwl_setup_rxon_timing(struct iwl_priv *priv)
{
u64 tsf;
s32 interval_tm, rem;
unsigned long flags;
struct ieee80211_conf *conf = NULL;
u16 beacon_int = 0;
conf = ieee80211_get_hw_conf(priv->hw);
spin_lock_irqsave(&priv->lock, flags);
priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
if (priv->iw_mode == NL80211_IFTYPE_STATION) {
beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
priv->rxon_timing.atim_window = 0;
} else {
beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
/* TODO: we need to get atim_window from upper stack
* for now we set to 0 */
priv->rxon_timing.atim_window = 0;
}
priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
interval_tm = beacon_int * 1024;
rem = do_div(tsf, interval_tm);
priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
le16_to_cpu(priv->rxon_timing.beacon_interval),
le32_to_cpu(priv->rxon_timing.beacon_init_val),
le16_to_cpu(priv->rxon_timing.atim_window));
}
static void iwl_set_flags_for_band(struct iwl_priv *priv,
enum ieee80211_band band)
{
if (band == IEEE80211_BAND_5GHZ) {
priv->staging_rxon.flags &=
~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
| RXON_FLG_CCK_MSK);
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
/* Copied from iwl_post_associate() */
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
}
}
/*
* initialize rxon structure with default values from eeprom
*/
static void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
{
const struct iwl_channel_info *ch_info;
memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
switch (mode) {
case NL80211_IFTYPE_AP:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
break;
case NL80211_IFTYPE_STATION:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_ADHOC:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
RXON_FILTER_ACCEPT_GRP_MSK;
break;
case NL80211_IFTYPE_MONITOR:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
break;
default:
IWL_ERROR("Unsupported interface type %d\n", mode);
break;
}
#if 0
/* TODO: Figure out when short_preamble would be set and cache from
* that */
if (!hw_to_local(priv->hw)->short_preamble)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif
ch_info = iwl_get_channel_info(priv, priv->band,
le16_to_cpu(priv->active_rxon.channel));
if (!ch_info)
ch_info = &priv->channel_info[0];
/*
* in some case A channels are all non IBSS
* in this case force B/G channel
*/
if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
!(is_channel_ibss(ch_info)))
ch_info = &priv->channel_info[0];
priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
priv->band = ch_info->band;
iwl_set_flags_for_band(priv, priv->band);
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
iwl_set_rxon_chain(priv);
}
static int iwl_set_mode(struct iwl_priv *priv, int mode)
{
iwl_connection_init_rx_config(priv, mode);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
iwl_clear_stations_table(priv);
/* dont commit rxon if rf-kill is on*/
if (!iwl_is_ready_rf(priv))
return -EAGAIN;
cancel_delayed_work(&priv->scan_check);
if (iwl_scan_cancel_timeout(priv, 100)) {
IWL_WARNING("Aborted scan still in progress after 100ms\n");
IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
return -EAGAIN;
}
iwl_commit_rxon(priv);
return 0;
}
static void iwl_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_supported_band *hw = NULL;
struct ieee80211_rate *rate;
int i;
hw = iwl_get_hw_mode(priv, priv->band);
if (!hw) {
IWL_ERROR("Failed to set rate: unable to get hw mode\n");
return;
}
priv->active_rate = 0;
priv->active_rate_basic = 0;
for (i = 0; i < hw->n_bitrates; i++) {
rate = &(hw->bitrates[i]);
if (rate->hw_value < IWL_RATE_COUNT)
priv->active_rate |= (1 << rate->hw_value);
}
IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
priv->active_rate, priv->active_rate_basic);
/*
* If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
* otherwise set it to the default of all CCK rates and 6, 12, 24 for
* OFDM
*/
if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
priv->staging_rxon.cck_basic_rates =
((priv->active_rate_basic &
IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
else
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
priv->staging_rxon.ofdm_basic_rates =
((priv->active_rate_basic &
(IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
IWL_FIRST_OFDM_RATE) & 0xFF;
else
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
static void iwl_rx_reply_alive(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_alive_resp *palive;
struct delayed_work *pwork;
palive = &pkt->u.alive_frame;
IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
"0x%01X 0x%01X\n",
palive->is_valid, palive->ver_type,
palive->ver_subtype);
if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
IWL_DEBUG_INFO("Initialization Alive received.\n");
memcpy(&priv->card_alive_init,
&pkt->u.alive_frame,
sizeof(struct iwl_init_alive_resp));
pwork = &priv->init_alive_start;
} else {
IWL_DEBUG_INFO("Runtime Alive received.\n");
memcpy(&priv->card_alive, &pkt->u.alive_frame,
sizeof(struct iwl_alive_resp));
pwork = &priv->alive_start;
}
/* We delay the ALIVE response by 5ms to
* give the HW RF Kill time to activate... */
if (palive->is_valid == UCODE_VALID_OK)
queue_delayed_work(priv->workqueue, pwork,
msecs_to_jiffies(5));
else
IWL_WARNING("uCode did not respond OK.\n");
}
static void iwl_rx_reply_error(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
"seq 0x%04X ser 0x%08X\n",
le32_to_cpu(pkt->u.err_resp.error_type),
get_cmd_string(pkt->u.err_resp.cmd_id),
pkt->u.err_resp.cmd_id,
le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
le32_to_cpu(pkt->u.err_resp.error_info));
}
#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
rxon->channel = csa->channel;
priv->staging_rxon.channel = csa->channel;
}
static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}
static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
"notification for %s:\n",
le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
}
static void iwl_bg_beacon_update(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, beacon_update);
struct sk_buff *beacon;
/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
beacon = ieee80211_beacon_get(priv->hw, priv->vif);
if (!beacon) {
IWL_ERROR("update beacon failed\n");
return;
}
mutex_lock(&priv->mutex);
/* new beacon skb is allocated every time; dispose previous.*/
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = beacon;
mutex_unlock(&priv->mutex);
iwl_send_beacon_cmd(priv);
}
/**
* iwl_bg_statistics_periodic - Timer callback to queue statistics
*
* This callback is provided in order to send a statistics request.
*
* This timer function is continually reset to execute within
* REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
* was received. We need to ensure we receive the statistics in order
* to update the temperature used for calibrating the TXPOWER.
*/
static void iwl_bg_statistics_periodic(unsigned long data)
{
struct iwl_priv *priv = (struct iwl_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* dont send host command if rf-kill is on */
if (!iwl_is_ready_rf(priv))
return;
iwl_send_statistics_request(priv, CMD_ASYNC);
}
static void iwl_rx_beacon_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
IWL_DEBUG_RX("beacon status %x retries %d iss %d "
"tsf %d %d rate %d\n",
le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
beacon->beacon_notify_hdr.failure_frame,
le32_to_cpu(beacon->ibss_mgr_status),
le32_to_cpu(beacon->high_tsf),
le32_to_cpu(beacon->low_tsf), rate);
#endif
if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
(!test_bit(STATUS_EXIT_PENDING, &priv->status)))
queue_work(priv->workqueue, &priv->beacon_update);
}
/* Handle notification from uCode that card's power state is changing
* due to software, hardware, or critical temperature RFKILL */
static void iwl_rx_card_state_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
unsigned long status = priv->status;
IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
(flags & HW_CARD_DISABLED) ? "Kill" : "On",
(flags & SW_CARD_DISABLED) ? "Kill" : "On");
if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
RF_CARD_DISABLED)) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
if (!iwl_grab_nic_access(priv)) {
iwl_write_direct32(
priv, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
iwl_release_nic_access(priv);
}
if (!(flags & RXON_CARD_DISABLED)) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
if (!iwl_grab_nic_access(priv)) {
iwl_write_direct32(
priv, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
iwl_release_nic_access(priv);
}
}
if (flags & RF_CARD_DISABLED) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (!iwl_grab_nic_access(priv))
iwl_release_nic_access(priv);
}
}
if (flags & HW_CARD_DISABLED)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
if (flags & SW_CARD_DISABLED)
set_bit(STATUS_RF_KILL_SW, &priv->status);
else
clear_bit(STATUS_RF_KILL_SW, &priv->status);
if (!(flags & RXON_CARD_DISABLED))
iwl_scan_cancel(priv);
if ((test_bit(STATUS_RF_KILL_HW, &status) !=
test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
(test_bit(STATUS_RF_KILL_SW, &status) !=
test_bit(STATUS_RF_KILL_SW, &priv->status)))
queue_work(priv->workqueue, &priv->rf_kill);
else
wake_up_interruptible(&priv->wait_command_queue);
}
int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
ret = iwl_grab_nic_access(priv);
if (ret)
goto err;
if (src == IWL_PWR_SRC_VAUX) {
u32 val;
ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
&val);
if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
~APMG_PS_CTRL_MSK_PWR_SRC);
} else {
iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
~APMG_PS_CTRL_MSK_PWR_SRC);
}
iwl_release_nic_access(priv);
err:
spin_unlock_irqrestore(&priv->lock, flags);
return ret;
}
/**
* iwl_setup_rx_handlers - Initialize Rx handler callbacks
*
* Setup the RX handlers for each of the reply types sent from the uCode
* to the host.
*
* This function chains into the hardware specific files for them to setup
* any hardware specific handlers as well.
*/
static void iwl_setup_rx_handlers(struct iwl_priv *priv)
{
priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
iwl_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
/*
* The same handler is used for both the REPLY to a discrete
* statistics request from the host as well as for the periodic
* statistics notifications (after received beacons) from the uCode.
*/
priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
iwl_setup_spectrum_handlers(priv);
iwl_setup_rx_scan_handlers(priv);
/* status change handler */
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
iwl_rx_missed_beacon_notif;
/* Rx handlers */
priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
/* block ack */
priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
/* Set up hardware specific Rx handlers */
priv->cfg->ops->lib->rx_handler_setup(priv);
}
/*
* this should be called while priv->lock is locked
*/
static void __iwl_rx_replenish(struct iwl_priv *priv)
{
iwl_rx_allocate(priv);
iwl_rx_queue_restock(priv);
}
/**
* iwl_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
* frame-received notifications, and other notifications.
*/
void iwl_rx_handle(struct iwl_priv *priv)
{
struct iwl_rx_mem_buffer *rxb;
struct iwl_rx_packet *pkt;
struct iwl_rx_queue *rxq = &priv->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
u8 fill_rx = 0;
u32 count = 8;
/* uCode's read index (stored in shared DRAM) indicates the last Rx
* buffer that the driver may process (last buffer filled by ucode). */
r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
i = rxq->read;
/* Rx interrupt, but nothing sent from uCode */
if (i == r)
IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
fill_rx = 1;
while (i != r) {
rxb = rxq->queue[i];
/* If an RXB doesn't have a Rx queue slot associated with it,
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
rxq->queue[i] = NULL;
dma_sync_single_range_for_cpu(
&priv->pci_dev->dev, rxb->real_dma_addr,
rxb->aligned_dma_addr - rxb->real_dma_addr,
priv->hw_params.rx_buf_size,
PCI_DMA_FROMDEVICE);
pkt = (struct iwl_rx_packet *)rxb->skb->data;
/* Reclaim a command buffer only if this packet is a response
* to a (driver-originated) command.
* If the packet (e.g. Rx frame) originated from uCode,
* there is no command buffer to reclaim.
* Ucode should set SEQ_RX_FRAME bit if ucode-originated,
* but apparently a few don't get set; catch them here. */
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
(pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
(pkt->hdr.cmd != REPLY_RX) &&
(pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
(pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
(pkt->hdr.cmd != REPLY_TX);
/* Based on type of command response or notification,
* handle those that need handling via function in
* rx_handlers table. See iwl_setup_rx_handlers() */
if (priv->rx_handlers[pkt->hdr.cmd]) {
IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
} else {
/* No handling needed */
IWL_DEBUG(IWL_DL_RX,
"r %d i %d No handler needed for %s, 0x%02x\n",
r, i, get_cmd_string(pkt->hdr.cmd),
pkt->hdr.cmd);
}
if (reclaim) {
/* Invoke any callbacks, transfer the skb to caller, and
* fire off the (possibly) blocking iwl_send_cmd()
* as we reclaim the driver command queue */
if (rxb && rxb->skb)
iwl_tx_cmd_complete(priv, rxb);
else
IWL_WARNING("Claim null rxb?\n");
}
/* For now we just don't re-use anything. We can tweak this
* later to try and re-use notification packets and SKBs that
* fail to Rx correctly */
if (rxb->skb != NULL) {
priv->alloc_rxb_skb--;
dev_kfree_skb_any(rxb->skb);
rxb->skb = NULL;
}
pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
priv->hw_params.rx_buf_size + 256,
PCI_DMA_FROMDEVICE);
spin_lock_irqsave(&rxq->lock, flags);
list_add_tail(&rxb->list, &priv->rxq.rx_used);
spin_unlock_irqrestore(&rxq->lock, flags);
i = (i + 1) & RX_QUEUE_MASK;
/* If there are a lot of unused frames,
* restock the Rx queue so ucode wont assert. */
if (fill_rx) {
count++;
if (count >= 8) {
priv->rxq.read = i;
__iwl_rx_replenish(priv);
count = 0;
}
}
}
/* Backtrack one entry */
priv->rxq.read = i;
iwl_rx_queue_restock(priv);
}
#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
{
struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
IWL_DEBUG_RADIO("RX CONFIG:\n");
iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
le32_to_cpu(rxon->filter_flags));
IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
rxon->ofdm_basic_rates);
IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif
static void iwl_enable_interrupts(struct iwl_priv *priv)
{
IWL_DEBUG_ISR("Enabling interrupts\n");
set_bit(STATUS_INT_ENABLED, &priv->status);
iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
}
/* call this function to flush any scheduled tasklet */
static inline void iwl_synchronize_irq(struct iwl_priv *priv)
{
/* wait to make sure we flush pending tasklet*/
synchronize_irq(priv->pci_dev->irq);
tasklet_kill(&priv->irq_tasklet);
}
static inline void iwl_disable_interrupts(struct iwl_priv *priv)
{
clear_bit(STATUS_INT_ENABLED, &priv->status);
/* disable interrupts from uCode/NIC to host */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* acknowledge/clear/reset any interrupts still pending
* from uCode or flow handler (Rx/Tx DMA) */
iwl_write32(priv, CSR_INT, 0xffffffff);
iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
IWL_DEBUG_ISR("Disabled interrupts\n");
}
/**
* iwl_irq_handle_error - called for HW or SW error interrupt from card
*/
static void iwl_irq_handle_error(struct iwl_priv *priv)
{
/* Set the FW error flag -- cleared on iwl_down */
set_bit(STATUS_FW_ERROR, &priv->status);
/* Cancel currently queued command. */
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & IWL_DL_FW_ERRORS) {
iwl_dump_nic_error_log(priv);
iwl_dump_nic_event_log(priv);
iwl_print_rx_config_cmd(priv);
}
#endif
wake_up_interruptible(&priv->wait_command_queue);
/* Keep the restart process from trying to send host
* commands by clearing the INIT status bit */
clear_bit(STATUS_READY, &priv->status);
if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG(IWL_DL_FW_ERRORS,
"Restarting adapter due to uCode error.\n");
if (iwl_is_associated(priv)) {
memcpy(&priv->recovery_rxon, &priv->active_rxon,
sizeof(priv->recovery_rxon));
priv->error_recovering = 1;
}
if (priv->cfg->mod_params->restart_fw)
queue_work(priv->workqueue, &priv->restart);
}
}
static void iwl_error_recovery(struct iwl_priv *priv)
{
unsigned long flags;
memcpy(&priv->staging_rxon, &priv->recovery_rxon,
sizeof(priv->staging_rxon));
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
iwl_rxon_add_station(priv, priv->bssid, 1);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
priv->error_recovering = 0;
spin_unlock_irqrestore(&priv->lock, flags);
}
static void iwl_irq_tasklet(struct iwl_priv *priv)
{
u32 inta, handled = 0;
u32 inta_fh;
unsigned long flags;
#ifdef CONFIG_IWLWIFI_DEBUG
u32 inta_mask;
#endif
spin_lock_irqsave(&priv->lock, flags);
/* Ack/clear/reset pending uCode interrupts.
* Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
* and will clear only when CSR_FH_INT_STATUS gets cleared. */
inta = iwl_read32(priv, CSR_INT);
iwl_write32(priv, CSR_INT, inta);
/* Ack/clear/reset pending flow-handler (DMA) interrupts.
* Any new interrupts that happen after this, either while we're
* in this tasklet, or later, will show up in next ISR/tasklet. */
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & IWL_DL_ISR) {
/* just for debug */
inta_mask = iwl_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
}
#endif
/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
* atomic, make sure that inta covers all the interrupts that
* we've discovered, even if FH interrupt came in just after
* reading CSR_INT. */
if (inta_fh & CSR49_FH_INT_RX_MASK)
inta |= CSR_INT_BIT_FH_RX;
if (inta_fh & CSR49_FH_INT_TX_MASK)
inta |= CSR_INT_BIT_FH_TX;
/* Now service all interrupt bits discovered above. */
if (inta & CSR_INT_BIT_HW_ERR) {
IWL_ERROR("Microcode HW error detected. Restarting.\n");
/* Tell the device to stop sending interrupts */
iwl_disable_interrupts(priv);
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_HW_ERR;
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & (IWL_DL_ISR)) {
/* NIC fires this, but we don't use it, redundant with WAKEUP */
if (inta & CSR_INT_BIT_SCD)
IWL_DEBUG_ISR("Scheduler finished to transmit "
"the frame/frames.\n");
/* Alive notification via Rx interrupt will do the real work */
if (inta & CSR_INT_BIT_ALIVE)
IWL_DEBUG_ISR("Alive interrupt\n");
}
#endif
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
/* HW RF KILL switch toggled */
if (inta & CSR_INT_BIT_RF_KILL) {
int hw_rf_kill = 0;
if (!(iwl_read32(priv, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
hw_rf_kill = 1;
IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
hw_rf_kill ? "disable radio" : "enable radio");
/* driver only loads ucode once setting the interface up.
* the driver as well won't allow loading if RFKILL is set
* therefore no need to restart the driver from this handler
*/
if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
clear_bit(STATUS_RF_KILL_HW, &priv->status);
handled |= CSR_INT_BIT_RF_KILL;
}
/* Chip got too hot and stopped itself */
if (inta & CSR_INT_BIT_CT_KILL) {
IWL_ERROR("Microcode CT kill error detected.\n");
handled |= CSR_INT_BIT_CT_KILL;
}
/* Error detected by uCode */
if (inta & CSR_INT_BIT_SW_ERR) {
IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
inta);
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_SW_ERR;
}
/* uCode wakes up after power-down sleep */
if (inta & CSR_INT_BIT_WAKEUP) {
IWL_DEBUG_ISR("Wakeup interrupt\n");
iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
iwl_txq_update_write_ptr(priv, &priv->txq[0]);
iwl_txq_update_write_ptr(priv, &priv->txq[1]);
iwl_txq_update_write_ptr(priv, &priv->txq[2]);
iwl_txq_update_write_ptr(priv, &priv->txq[3]);
iwl_txq_update_write_ptr(priv, &priv->txq[4]);
iwl_txq_update_write_ptr(priv, &priv->txq[5]);
handled |= CSR_INT_BIT_WAKEUP;
}
/* All uCode command responses, including Tx command responses,
* Rx "responses" (frame-received notification), and other
* notifications from uCode come through here*/
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
iwl_rx_handle(priv);
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
}
if (inta & CSR_INT_BIT_FH_TX) {
IWL_DEBUG_ISR("Tx interrupt\n");
handled |= CSR_INT_BIT_FH_TX;
/* FH finished to write, send event */
priv->ucode_write_complete = 1;
wake_up_interruptible(&priv->wait_command_queue);
}
if (inta & ~handled)
IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
if (inta & ~CSR_INI_SET_MASK) {
IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
inta & ~CSR_INI_SET_MASK);
IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
}
/* Re-enable all interrupts */
/* only Re-enable if diabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl_enable_interrupts(priv);
#ifdef CONFIG_IWLWIFI_DEBUG
if (priv->debug_level & (IWL_DL_ISR)) {
inta = iwl_read32(priv, CSR_INT);
inta_mask = iwl_read32(priv, CSR_INT_MASK);
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
"flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
}
#endif
spin_unlock_irqrestore(&priv->lock, flags);
}
static irqreturn_t iwl_isr(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
u32 inta_fh;
if (!priv)
return IRQ_NONE;
spin_lock(&priv->lock);
/* Disable (but don't clear!) interrupts here to avoid
* back-to-back ISRs and sporadic interrupts from our NIC.
* If we have something to service, the tasklet will re-enable ints.
* If we *don't* have something, we'll re-enable before leaving here. */
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* Discover which interrupts are active/pending */
inta = iwl_read32(priv, CSR_INT);
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
/* Ignore interrupt if there's nothing in NIC to service.
* This may be due to IRQ shared with another device,
* or due to sporadic interrupts thrown from our NIC. */
if (!inta && !inta_fh) {
IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
goto none;
}
if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
/* Hardware disappeared. It might have already raised
* an interrupt */
IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
goto unplugged;
}
IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
inta &= ~CSR_INT_BIT_SCD;
/* iwl_irq_tasklet() will service interrupts and re-enable them */
if (likely(inta || inta_fh))
tasklet_schedule(&priv->irq_tasklet);
unplugged:
spin_unlock(&priv->lock);
return IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service. */
/* only Re-enable if diabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
{
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
}
static void iwl_nic_start(struct iwl_priv *priv)
{
/* Remove all resets to allow NIC to operate */
iwl_write32(priv, CSR_RESET, 0);
}
/**
* iwl_read_ucode - Read uCode images from disk file.
*
* Copy into buffers for card to fetch via bus-mastering
*/
static int iwl_read_ucode(struct iwl_priv *priv)
{
struct iwl_ucode *ucode;
int ret;
const struct firmware *ucode_raw;
const char *name = priv->cfg->fw_name;
u8 *src;
size_t len;
u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
/* Ask kernel firmware_class module to get the boot firmware off disk.
* request_firmware() is synchronous, file is in memory on return. */
ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
if (ret < 0) {
IWL_ERROR("%s firmware file req failed: Reason %d\n",
name, ret);
goto error;
}
IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
name, ucode_raw->size);
/* Make sure that we got at least our header! */
if (ucode_raw->size < sizeof(*ucode)) {
IWL_ERROR("File size way too small!\n");
ret = -EINVAL;
goto err_release;
}
/* Data from ucode file: header followed by uCode images */
ucode = (void *)ucode_raw->data;
ver = le32_to_cpu(ucode->ver);
inst_size = le32_to_cpu(ucode->inst_size);
data_size = le32_to_cpu(ucode->data_size);
init_size = le32_to_cpu(ucode->init_size);
init_data_size = le32_to_cpu(ucode->init_data_size);
boot_size = le32_to_cpu(ucode->boot_size);
IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
inst_size);
IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
data_size);
IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
init_size);
IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
init_data_size);
IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
boot_size);
/* Verify size of file vs. image size info in file's header */
if (ucode_raw->size < sizeof(*ucode) +
inst_size + data_size + init_size +
init_data_size + boot_size) {
IWL_DEBUG_INFO("uCode file size %d too small\n",
(int)ucode_raw->size);
ret = -EINVAL;
goto err_release;
}
/* Verify that uCode images will fit in card's SRAM */
if (inst_size > priv->hw_params.max_inst_size) {
IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
inst_size);
ret = -EINVAL;
goto err_release;
}
if (data_size > priv->hw_params.max_data_size) {
IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
data_size);
ret = -EINVAL;
goto err_release;
}
if (init_size > priv->hw_params.max_inst_size) {
IWL_DEBUG_INFO
("uCode init instr len %d too large to fit in\n",
init_size);
ret = -EINVAL;
goto err_release;
}
if (init_data_size > priv->hw_params.max_data_size) {
IWL_DEBUG_INFO
("uCode init data len %d too large to fit in\n",
init_data_size);
ret = -EINVAL;
goto err_release;
}
if (boot_size > priv->hw_params.max_bsm_size) {
IWL_DEBUG_INFO
("uCode boot instr len %d too large to fit in\n",
boot_size);
ret = -EINVAL;
goto err_release;
}
/* Allocate ucode buffers for card's bus-master loading ... */
/* Runtime instructions and 2 copies of data:
* 1) unmodified from disk
* 2) backup cache for save/restore during power-downs */
priv->ucode_code.len = inst_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
priv->ucode_data.len = data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
priv->ucode_data_backup.len = data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
/* Initialization instructions and data */
if (init_size && init_data_size) {
priv->ucode_init.len = init_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
priv->ucode_init_data.len = init_data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
goto err_pci_alloc;
}
/* Bootstrap (instructions only, no data) */
if (boot_size) {
priv->ucode_boot.len = boot_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
if (!priv->ucode_boot.v_addr)
goto err_pci_alloc;
}
/* Copy images into buffers for card's bus-master reads ... */
/* Runtime instructions (first block of data in file) */
src = &ucode->data[0];
len = priv->ucode_code.len;
IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
memcpy(priv->ucode_code.v_addr, src, len);
IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
/* Runtime data (2nd block)
* NOTE: Copy into backup buffer will be done in iwl_up() */
src = &ucode->data[inst_size];
len = priv->ucode_data.len;
IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
memcpy(priv->ucode_data.v_addr, src, len);
memcpy(priv->ucode_data_backup.v_addr, src, len);
/* Initialization instructions (3rd block) */
if (init_size) {
src = &ucode->data[inst_size + data_size];
len = priv->ucode_init.len;
IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
len);
memcpy(priv->ucode_init.v_addr, src, len);
}
/* Initialization data (4th block) */
if (init_data_size) {
src = &ucode->data[inst_size + data_size + init_size];
len = priv->ucode_init_data.len;
IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
len);
memcpy(priv->ucode_init_data.v_addr, src, len);
}
/* Bootstrap instructions (5th block) */
src = &ucode->data[inst_size + data_size + init_size + init_data_size];
len = priv->ucode_boot.len;
IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
memcpy(priv->ucode_boot.v_addr, src, len);
/* We have our copies now, allow OS release its copies */
release_firmware(ucode_raw);
return 0;
err_pci_alloc:
IWL_ERROR("failed to allocate pci memory\n");
ret = -ENOMEM;
iwl_dealloc_ucode_pci(priv);
err_release:
release_firmware(ucode_raw);
error:
return ret;
}
/* temporary */
static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
struct sk_buff *skb);
/**
* iwl_alive_start - called after REPLY_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by iwl_init_alive_start()).
*/
static void iwl_alive_start(struct iwl_priv *priv)
{
int ret = 0;
IWL_DEBUG_INFO("Runtime Alive received.\n");
if (priv->card_alive.is_valid != UCODE_VALID_OK) {
/* We had an error bringing up the hardware, so take it
* all the way back down so we can try again */
IWL_DEBUG_INFO("Alive failed.\n");
goto restart;
}
/* Initialize uCode has loaded Runtime uCode ... verify inst image.
* This is a paranoid check, because we would not have gotten the
* "runtime" alive if code weren't properly loaded. */
if (iwl_verify_ucode(priv)) {
/* Runtime instruction load was bad;
* take it all the way back down so we can try again */
IWL_DEBUG_INFO("Bad runtime uCode load.\n");
goto restart;
}
iwl_clear_stations_table(priv);
ret = priv->cfg->ops->lib->alive_notify(priv);
if (ret) {
IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
ret);
goto restart;
}
/* After the ALIVE response, we can send host commands to the uCode */
set_bit(STATUS_ALIVE, &priv->status);
if (iwl_is_rfkill(priv))
return;
ieee80211_wake_queues(priv->hw);
priv->active_rate = priv->rates_mask;
priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
if (iwl_is_associated(priv)) {
struct iwl_rxon_cmd *active_rxon =
(struct iwl_rxon_cmd *)&priv->active_rxon;
memcpy(&priv->staging_rxon, &priv->active_rxon,
sizeof(priv->staging_rxon));
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
} else {
/* Initialize our rx_config data */
iwl_connection_init_rx_config(priv, priv->iw_mode);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
}
/* Configure Bluetooth device coexistence support */
iwl_send_bt_config(priv);
iwl_reset_run_time_calib(priv);
/* Configure the adapter for unassociated operation */
iwl_commit_rxon(priv);
/* At this point, the NIC is initialized and operational */
iwl_rf_kill_ct_config(priv);
iwl_leds_register(priv);
IWL_DEBUG_INFO("ALIVE processing complete.\n");
set_bit(STATUS_READY, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
if (priv->error_recovering)
iwl_error_recovery(priv);
iwl_power_update_mode(priv, 1);
/* reassociate for ADHOC mode */
if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
priv->vif);
if (beacon)
iwl_mac_beacon_update(priv->hw, beacon);
}
if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
iwl_set_mode(priv, priv->iw_mode);
return;
restart:
queue_work(priv->workqueue, &priv->restart);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv);
static void __iwl_down(struct iwl_priv *priv)
{
unsigned long flags;
int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
IWL_DEBUG_INFO(DRV_NAME " is going down\n");
if (!exit_pending)
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl_leds_unregister(priv);
iwl_clear_stations_table(priv);
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
clear_bit(STATUS_EXIT_PENDING, &priv->status);
/* stop and reset the on-board processor */
iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
/* tell the device to stop sending interrupts */
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
/* If we have not previously called iwl_init() then
* clear all bits but the RF Kill and SUSPEND bits and return */
if (!iwl_is_init(priv)) {
priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_RF_KILL_SW, &priv->status) <<
STATUS_RF_KILL_SW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND |
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
goto exit;
}
/* ...otherwise clear out all the status bits but the RF Kill and
* SUSPEND bits and continue taking the NIC down. */
priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_RF_KILL_SW, &priv->status) <<
STATUS_RF_KILL_SW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND |
test_bit(STATUS_FW_ERROR, &priv->status) <<
STATUS_FW_ERROR |
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
spin_lock_irqsave(&priv->lock, flags);
iwl_clear_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_txq_ctx_stop(priv);
iwl_rxq_stop(priv);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_grab_nic_access(priv)) {
iwl_write_prph(priv, APMG_CLK_DIS_REG,
APMG_CLK_VAL_DMA_CLK_RQT);
iwl_release_nic_access(priv);
}
spin_unlock_irqrestore(&priv->lock, flags);
udelay(5);
/* FIXME: apm_ops.suspend(priv) */
if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
priv->cfg->ops->lib->apm_ops.stop(priv);
else
priv->cfg->ops->lib->apm_ops.reset(priv);
exit:
memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
/* clear out any free frames */
iwl_clear_free_frames(priv);
}
static void iwl_down(struct iwl_priv *priv)
{
mutex_lock(&priv->mutex);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
iwl_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
static int __iwl_up(struct iwl_priv *priv)
{
int i;
int ret;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARNING("Exit pending; will not bring the NIC up\n");
return -EIO;
}
if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
IWL_ERROR("ucode not available for device bringup\n");
return -EIO;
}
/* If platform's RF_KILL switch is NOT set to KILL */
if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(STATUS_RF_KILL_HW, &priv->status);
else
set_bit(STATUS_RF_KILL_HW, &priv->status);
if (iwl_is_rfkill(priv)) {
iwl_enable_interrupts(priv);
IWL_WARNING("Radio disabled by %s RF Kill switch\n",
test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
return 0;
}
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
ret = iwl_hw_nic_init(priv);
if (ret) {
IWL_ERROR("Unable to init nic\n");
return ret;
}
/* make sure rfkill handshake bits are cleared */
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
/* clear (again), then enable host interrupts */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
iwl_enable_interrupts(priv);
/* really make sure rfkill handshake bits are cleared */
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
/* Copy original ucode data image from disk into backup cache.
* This will be used to initialize the on-board processor's
* data SRAM for a clean start when the runtime program first loads. */
memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
priv->ucode_data.len);
for (i = 0; i < MAX_HW_RESTARTS; i++) {
iwl_clear_stations_table(priv);
/* load bootstrap state machine,
* load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */
ret = priv->cfg->ops->lib->load_ucode(priv);
if (ret) {
IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
continue;
}
/* Clear out the uCode error bit if it is set */
clear_bit(STATUS_FW_ERROR, &priv->status);
/* start card; "initialize" will load runtime ucode */
iwl_nic_start(priv);
IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
return 0;
}
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl_down(priv);
clear_bit(STATUS_EXIT_PENDING, &priv->status);
/* tried to restart and config the device for as long as our
* patience could withstand */
IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
return -EIO;
}
/*****************************************************************************
*
* Workqueue callbacks
*
*****************************************************************************/
static void iwl_bg_init_alive_start(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, init_alive_start.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
priv->cfg->ops->lib->init_alive_start(priv);
mutex_unlock(&priv->mutex);
}
static void iwl_bg_alive_start(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, alive_start.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl_alive_start(priv);
mutex_unlock(&priv->mutex);
}
static void iwl_bg_rf_kill(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
wake_up_interruptible(&priv->wait_command_queue);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
if (!iwl_is_rfkill(priv)) {
IWL_DEBUG(IWL_DL_RF_KILL,
"HW and/or SW RF Kill no longer active, restarting "
"device\n");
if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
queue_work(priv->workqueue, &priv->restart);
} else {
/* make sure mac80211 stop sending Tx frame */
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
IWL_DEBUG_RF_KILL("Can not turn radio back on - "
"disabled by SW switch\n");
else
IWL_WARNING("Radio Frequency Kill Switch is On:\n"
"Kill switch must be turned off for "
"wireless networking to work.\n");
}
mutex_unlock(&priv->mutex);
iwl_rfkill_set_hw_state(priv);
}
static void iwl_bg_run_time_calib_work(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
run_time_calib_work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status)) {
mutex_unlock(&priv->mutex);
return;
}
if (priv->start_calib) {
iwl_chain_noise_calibration(priv, &priv->statistics);
iwl_sensitivity_calibration(priv, &priv->statistics);
}
mutex_unlock(&priv->mutex);
return;
}
static void iwl_bg_up(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
__iwl_up(priv);
mutex_unlock(&priv->mutex);
iwl_rfkill_set_hw_state(priv);
}
static void iwl_bg_restart(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
iwl_down(priv);
queue_work(priv->workqueue, &priv->up);
}
static void iwl_bg_rx_replenish(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, rx_replenish);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl_rx_replenish(priv);
mutex_unlock(&priv->mutex);
}
#define IWL_DELAY_NEXT_SCAN (HZ*2)
static void iwl_post_associate(struct iwl_priv *priv)
{
struct ieee80211_conf *conf = NULL;
int ret = 0;
unsigned long flags;
if (priv->iw_mode == NL80211_IFTYPE_AP) {
IWL_ERROR("%s Should not be called in AP mode\n", __func__);
return;
}
IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
priv->assoc_id, priv->active_rxon.bssid_addr);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!priv->vif || !priv->is_open)
return;
iwl_power_cancel_timeout(priv);
iwl_scan_cancel_timeout(priv, 200);
conf = ieee80211_get_hw_conf(priv->hw);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
iwl_setup_rxon_timing(priv);
ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (ret)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
iwl_set_rxon_ht(priv, &priv->current_ht_config);
iwl_set_rxon_chain(priv);
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
priv->assoc_id, priv->beacon_int);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
}
iwl_commit_rxon(priv);
switch (priv->iw_mode) {
case NL80211_IFTYPE_STATION:
break;
case NL80211_IFTYPE_ADHOC:
/* assume default assoc id */
priv->assoc_id = 1;
iwl_rxon_add_station(priv, priv->bssid, 0);
iwl_send_beacon_cmd(priv);
break;
default:
IWL_ERROR("%s Should not be called in %d mode\n",
__func__, priv->iw_mode);
break;
}
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->assoc_station_added = 1;
spin_lock_irqsave(&priv->lock, flags);
iwl_activate_qos(priv, 0);
spin_unlock_irqrestore(&priv->lock, flags);
/* the chain noise calibration will enabled PM upon completion
* If chain noise has already been run, then we need to enable
* power management here */
if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
iwl_power_enable_management(priv);
/* Enable Rx differential gain and sensitivity calibrations */
iwl_chain_noise_reset(priv);
priv->start_calib = 1;
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
#define UCODE_READY_TIMEOUT (4 * HZ)
static int iwl_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
int ret;
u16 pci_cmd;
IWL_DEBUG_MAC80211("enter\n");
if (pci_enable_device(priv->pci_dev)) {
IWL_ERROR("Fail to pci_enable_device\n");
return -ENODEV;
}
pci_restore_state(priv->pci_dev);
pci_enable_msi(priv->pci_dev);
/* enable interrupts if needed: hw bug w/a */
pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
}
ret = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
DRV_NAME, priv);
if (ret) {
IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
goto out_disable_msi;
}
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
/* fetch ucode file from disk, alloc and copy to bus-master buffers ...
* ucode filename and max sizes are card-specific. */
if (!priv->ucode_code.len) {
ret = iwl_read_ucode(priv);
if (ret) {
IWL_ERROR("Could not read microcode: %d\n", ret);
mutex_unlock(&priv->mutex);
goto out_release_irq;
}
}
ret = __iwl_up(priv);
mutex_unlock(&priv->mutex);
iwl_rfkill_set_hw_state(priv);
if (ret)
goto out_release_irq;
if (iwl_is_rfkill(priv))
goto out;
IWL_DEBUG_INFO("Start UP work done.\n");
if (test_bit(STATUS_IN_SUSPEND, &priv->status))
return 0;
/* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
* mac80211 will not be run successfully. */
ret = wait_event_interruptible_timeout(priv->wait_command_queue,
test_bit(STATUS_READY, &priv->status),
UCODE_READY_TIMEOUT);
if (!ret) {
if (!test_bit(STATUS_READY, &priv->status)) {
IWL_ERROR("START_ALIVE timeout after %dms.\n",
jiffies_to_msecs(UCODE_READY_TIMEOUT));
ret = -ETIMEDOUT;
goto out_release_irq;
}
}
out:
priv->is_open = 1;
IWL_DEBUG_MAC80211("leave\n");
return 0;
out_release_irq:
free_irq(priv->pci_dev->irq, priv);
out_disable_msi:
pci_disable_msi(priv->pci_dev);
pci_disable_device(priv->pci_dev);
priv->is_open = 0;
IWL_DEBUG_MAC80211("leave - failed\n");
return ret;
}
static void iwl_mac_stop(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
if (!priv->is_open) {
IWL_DEBUG_MAC80211("leave - skip\n");
return;
}
priv->is_open = 0;
if (iwl_is_ready_rf(priv)) {
/* stop mac, cancel any scan request and clear
* RXON_FILTER_ASSOC_MSK BIT
*/
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
mutex_unlock(&priv->mutex);
}
iwl_down(priv);
flush_workqueue(priv->workqueue);
free_irq(priv->pci_dev->irq, priv);
pci_disable_msi(priv->pci_dev);
pci_save_state(priv->pci_dev);
pci_disable_device(priv->pci_dev);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MACDUMP("enter\n");
IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
if (iwl_tx_skb(priv, skb))
dev_kfree_skb_any(skb);
IWL_DEBUG_MACDUMP("leave\n");
return 0;
}
static int iwl_mac_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
if (priv->vif) {
IWL_DEBUG_MAC80211("leave - vif != NULL\n");
return -EOPNOTSUPP;
}
spin_lock_irqsave(&priv->lock, flags);
priv->vif = conf->vif;
priv->iw_mode = conf->type;
spin_unlock_irqrestore(&priv->lock, flags);
mutex_lock(&priv->mutex);
if (conf->mac_addr) {
IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
}
if (iwl_set_mode(priv, conf->type) == -EAGAIN)
/* we are not ready, will run again when ready */
set_bit(STATUS_MODE_PENDING, &priv->status);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
/**
* iwl_mac_config - mac80211 config callback
*
* We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
* be set inappropriately and the driver currently sets the hardware up to
* use it whenever needed.
*/
static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
{
struct iwl_priv *priv = hw->priv;
const struct iwl_channel_info *ch_info;
struct ieee80211_conf *conf = &hw->conf;
unsigned long flags;
int ret = 0;
u16 channel;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
priv->current_ht_config.is_ht = conf->ht.enabled;
if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
goto out;
}
if (!conf->radio_enabled)
iwl_radio_kill_sw_disable_radio(priv);
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
ret = -EIO;
goto out;
}
if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
test_bit(STATUS_SCANNING, &priv->status))) {
IWL_DEBUG_MAC80211("leave - scanning\n");
mutex_unlock(&priv->mutex);
return 0;
}
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_MAC80211("leave - invalid channel\n");
ret = -EINVAL;
goto out;
}
if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
!is_channel_ibss(ch_info)) {
IWL_ERROR("channel %d in band %d not IBSS channel\n",
conf->channel->hw_value, conf->channel->band);
ret = -EINVAL;
goto out;
}
spin_lock_irqsave(&priv->lock, flags);
/* if we are switching from ht to 2.4 clear flags
* from any ht related info since 2.4 does not
* support ht */
if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
#ifdef IEEE80211_CONF_CHANNEL_SWITCH
&& !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
#endif
)
priv->staging_rxon.flags = 0;
iwl_set_rxon_channel(priv, conf->channel);
iwl_set_flags_for_band(priv, conf->channel->band);
/* The list of supported rates and rate mask can be different
* for each band; since the band may have changed, reset
* the rate mask to what mac80211 lists */
iwl_set_rate(priv);
spin_unlock_irqrestore(&priv->lock, flags);
#ifdef IEEE80211_CONF_CHANNEL_SWITCH
if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
iwl_hw_channel_switch(priv, conf->channel);
goto out;
}
#endif
if (!conf->radio_enabled) {
IWL_DEBUG_MAC80211("leave - radio disabled\n");
goto out;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_MAC80211("leave - RF kill\n");
ret = -EIO;
goto out;
}
if (conf->flags & IEEE80211_CONF_PS)
ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
else
ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
if (ret)
IWL_DEBUG_MAC80211("Error setting power level\n");
IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
priv->tx_power_user_lmt, conf->power_level);
iwl_set_tx_power(priv, conf->power_level, false);
iwl_set_rate(priv);
if (memcmp(&priv->active_rxon,
&priv->staging_rxon, sizeof(priv->staging_rxon)))
iwl_commit_rxon(priv);
else
IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
IWL_DEBUG_MAC80211("leave\n");
out:
mutex_unlock(&priv->mutex);
return ret;
}
static void iwl_config_ap(struct iwl_priv *priv)
{
int ret = 0;
unsigned long flags;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* The following should be done only at AP bring up */
if (!iwl_is_associated(priv)) {
/* RXON - unassoc (to set timing command) */
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
/* RXON Timing */
iwl_setup_rxon_timing(priv);
ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (ret)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
iwl_set_rxon_chain(priv);
/* FIXME: what should be the assoc_id for AP? */
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability &
WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_SLOT_MSK;
}
/* restore RXON assoc */
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl_activate_qos(priv, 1);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
}
iwl_send_beacon_cmd(priv);
/* FIXME - we need to add code here to detect a totally new
* configuration, reset the AP, unassoc, rxon timing, assoc,
* clear sta table, add BCAST sta... */
}
static int iwl_mac_config_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_if_conf *conf)
{
struct iwl_priv *priv = hw->priv;
int rc;
if (conf == NULL)
return -EIO;
if (priv->vif != vif) {
IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
return 0;
}
if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
conf->changed & IEEE80211_IFCC_BEACON) {
struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
if (!beacon)
return -ENOMEM;
mutex_lock(&priv->mutex);
rc = iwl_mac_beacon_update(hw, beacon);
mutex_unlock(&priv->mutex);
if (rc)
return rc;
}
if (!iwl_is_alive(priv))
return -EAGAIN;
mutex_lock(&priv->mutex);
if (conf->bssid)
IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
/*
* very dubious code was here; the probe filtering flag is never set:
*
if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
!(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
*/
if (priv->iw_mode == NL80211_IFTYPE_AP) {
if (!conf->bssid) {
conf->bssid = priv->mac_addr;
memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
conf->bssid);
}
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
}
if (iwl_is_rfkill(priv))
goto done;
if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
!is_multicast_ether_addr(conf->bssid)) {
/* If there is currently a HW scan going on in the background
* then we need to cancel it else the RXON below will fail. */
if (iwl_scan_cancel_timeout(priv, 100)) {
IWL_WARNING("Aborted scan still in progress "
"after 100ms\n");
IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
mutex_unlock(&priv->mutex);
return -EAGAIN;
}
memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
/* TODO: Audit driver for usage of these members and see
* if mac80211 deprecates them (priv->bssid looks like it
* shouldn't be there, but I haven't scanned the IBSS code
* to verify) - jpk */
memcpy(priv->bssid, conf->bssid, ETH_ALEN);
if (priv->iw_mode == NL80211_IFTYPE_AP)
iwl_config_ap(priv);
else {
rc = iwl_commit_rxon(priv);
if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
iwl_rxon_add_station(
priv, priv->active_rxon.bssid_addr, 1);
}
} else {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
}
done:
IWL_DEBUG_MAC80211("leave\n");
mutex_unlock(&priv->mutex);
return 0;
}
static void iwl_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count, struct dev_addr_list *mc_list)
{
struct iwl_priv *priv = hw->priv;
__le32 *filter_flags = &priv->staging_rxon.filter_flags;
IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
changed_flags, *total_flags);
if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
*filter_flags |= RXON_FILTER_PROMISC_MSK;
else
*filter_flags &= ~RXON_FILTER_PROMISC_MSK;
}
if (changed_flags & FIF_ALLMULTI) {
if (*total_flags & FIF_ALLMULTI)
*filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
else
*filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
}
if (changed_flags & FIF_CONTROL) {
if (*total_flags & FIF_CONTROL)
*filter_flags |= RXON_FILTER_CTL2HOST_MSK;
else
*filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
}
if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
*filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
else
*filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
}
/* We avoid iwl_commit_rxon here to commit the new filter flags
* since mac80211 will call ieee80211_hw_config immediately.
* (mc_list is not supported at this time). Otherwise, we need to
* queue a background iwl_commit_rxon work.
*/
*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_ready_rf(priv)) {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
}
if (priv->vif == conf->vif) {
priv->vif = NULL;
memset(priv->bssid, 0, ETH_ALEN);
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
}
#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
static void iwl_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
if (changes & BSS_CHANGED_ERP_PREAMBLE) {
IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
bss_conf->use_short_preamble);
if (bss_conf->use_short_preamble)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
}
if (changes & BSS_CHANGED_ERP_CTS_PROT) {
IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
}
if (changes & BSS_CHANGED_HT) {
iwl_ht_conf(priv, bss_conf);
iwl_set_rxon_chain(priv);
}
if (changes & BSS_CHANGED_ASSOC) {
IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
/* This should never happen as this function should
* never be called from interrupt context. */
if (WARN_ON_ONCE(in_interrupt()))
return;
if (bss_conf->assoc) {
priv->assoc_id = bss_conf->aid;
priv->beacon_int = bss_conf->beacon_int;
priv->power_data.dtim_period = bss_conf->dtim_period;
priv->timestamp = bss_conf->timestamp;
priv->assoc_capability = bss_conf->assoc_capability;
/* we have just associated, don't start scan too early
* leave time for EAPOL exchange to complete
*/
priv->next_scan_jiffies = jiffies +
IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
mutex_lock(&priv->mutex);
iwl_post_associate(priv);
mutex_unlock(&priv->mutex);
} else {
priv->assoc_id = 0;
IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
}
} else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
iwl_send_rxon_assoc(priv);
}
}
static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
{
unsigned long flags;
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211("enter\n");
mutex_lock(&priv->mutex);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
ret = -EIO;
IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
goto out_unlock;
}
if (priv->iw_mode == NL80211_IFTYPE_AP) { /* APs don't scan */
ret = -EIO;
IWL_ERROR("ERROR: APs don't scan\n");
goto out_unlock;
}
/* We don't schedule scan within next_scan_jiffies period.
* Avoid scanning during possible EAPOL exchange, return
* success immediately.
*/
if (priv->next_scan_jiffies &&
time_after(priv->next_scan_jiffies, jiffies)) {
IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
/* if we just finished scan ask for delay */
if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
if (ssid_len) {
priv->one_direct_scan = 1;
priv->direct_ssid_len = min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
} else {
priv->one_direct_scan = 0;
}
ret = iwl_scan_initiate(priv);
IWL_DEBUG_MAC80211("leave\n");
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
mutex_unlock(&priv->mutex);
return ret;
}
static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
struct ieee80211_key_conf *keyconf, const u8 *addr,
u32 iv32, u16 *phase1key)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
const u8 *local_addr, const u8 *addr,
struct ieee80211_key_conf *key)
{
struct iwl_priv *priv = hw->priv;
int ret = 0;
u8 sta_id = IWL_INVALID_STATION;
u8 is_default_wep_key = 0;
IWL_DEBUG_MAC80211("enter\n");
if (priv->hw_params.sw_crypto) {
IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
if (is_zero_ether_addr(addr))
/* only support pairwise keys */
return -EOPNOTSUPP;
sta_id = iwl_find_station(priv, addr);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
addr);
return -EINVAL;
}
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
mutex_unlock(&priv->mutex);
/* If we are getting WEP group key and we didn't receive any key mapping
* so far, we are in legacy wep mode (group key only), otherwise we are
* in 1X mode.
* In legacy wep mode, we use another host command to the uCode */
if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
priv->iw_mode != NL80211_IFTYPE_AP) {
if (cmd == SET_KEY)
is_default_wep_key = !priv->key_mapping_key;
else
is_default_wep_key =
(key->hw_key_idx == HW_KEY_DEFAULT);
}
switch (cmd) {
case SET_KEY:
if (is_default_wep_key)
ret = iwl_set_default_wep_key(priv, key);
else
ret = iwl_set_dynamic_key(priv, key, sta_id);
IWL_DEBUG_MAC80211("enable hwcrypto key\n");
break;
case DISABLE_KEY:
if (is_default_wep_key)
ret = iwl_remove_default_wep_key(priv, key);
else
ret = iwl_remove_dynamic_key(priv, key, sta_id);
IWL_DEBUG_MAC80211("disable hwcrypto key\n");
break;
default:
ret = -EINVAL;
}
IWL_DEBUG_MAC80211("leave\n");
return ret;
}
static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
int q;
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - RF not ready\n");
return -EIO;
}
if (queue >= AC_NUM) {
IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
return 0;
}
if (!priv->qos_data.qos_enable) {
priv->qos_data.qos_active = 0;
IWL_DEBUG_MAC80211("leave - qos not enabled\n");
return 0;
}
q = AC_NUM - 1 - queue;
spin_lock_irqsave(&priv->lock, flags);
priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
priv->qos_data.def_qos_parm.ac[q].edca_txop =
cpu_to_le16((params->txop * 32));
priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
priv->qos_data.qos_active = 1;
if (priv->iw_mode == NL80211_IFTYPE_AP)
iwl_activate_qos(priv, 1);
else if (priv->assoc_id && iwl_is_associated(priv))
iwl_activate_qos(priv, 0);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
sta->addr, tid);
if (!(priv->cfg->sku & IWL_SKU_N))
return -EACCES;
switch (action) {
case IEEE80211_AMPDU_RX_START:
IWL_DEBUG_HT("start Rx\n");
return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
case IEEE80211_AMPDU_RX_STOP:
IWL_DEBUG_HT("stop Rx\n");
return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
case IEEE80211_AMPDU_TX_START:
IWL_DEBUG_HT("start Tx\n");
return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
case IEEE80211_AMPDU_TX_STOP:
IWL_DEBUG_HT("stop Tx\n");
return iwl_tx_agg_stop(priv, sta->addr, tid);
default:
IWL_DEBUG_HT("unknown\n");
return -EINVAL;
break;
}
return 0;
}
static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats)
{
struct iwl_priv *priv = hw->priv;
int i, avail;
struct iwl_tx_queue *txq;
struct iwl_queue *q;
unsigned long flags;
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - RF not ready\n");
return -EIO;
}
spin_lock_irqsave(&priv->lock, flags);
for (i = 0; i < AC_NUM; i++) {
txq = &priv->txq[i];
q = &txq->q;
avail = iwl_queue_space(q);
stats[i].len = q->n_window - avail;
stats[i].limit = q->n_window - q->high_mark;
stats[i].count = q->n_window;
}
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static int iwl_mac_get_stats(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
struct iwl_priv *priv = hw->priv;
priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter\n");
spin_lock_irqsave(&priv->lock, flags);
memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
spin_unlock_irqrestore(&priv->lock, flags);
iwl_reset_qos(priv);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = 0;
priv->assoc_capability = 0;
priv->assoc_station_added = 0;
/* new association get rid of ibss beacon skb */
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
priv->beacon_int = priv->hw->conf.beacon_int;
priv->timestamp = 0;
if ((priv->iw_mode == NL80211_IFTYPE_STATION))
priv->beacon_int = 0;
spin_unlock_irqrestore(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
mutex_unlock(&priv->mutex);
return;
}
/* we are restarting association process
* clear RXON_FILTER_ASSOC_MSK bit
*/
if (priv->iw_mode != NL80211_IFTYPE_AP) {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
}
iwl_power_update_mode(priv, 0);
/* Per mac80211.h: This is only used in IBSS mode... */
if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
/* switch to CAM during association period.
* the ucode will block any association/authentication
* frome during assiciation period if it can not hear
* the AP because of PM. the timer enable PM back is
* association do not complete
*/
if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
IEEE80211_CHAN_RADAR))
iwl_power_disable_management(priv, 3000);
IWL_DEBUG_MAC80211("leave - not in IBSS\n");
mutex_unlock(&priv->mutex);
return;
}
iwl_set_rate(priv);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
__le64 timestamp;
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - RF not ready\n");
return -EIO;
}
if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
IWL_DEBUG_MAC80211("leave - not IBSS\n");
return -EIO;
}
spin_lock_irqsave(&priv->lock, flags);
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = skb;
priv->assoc_id = 0;
timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
priv->timestamp = le64_to_cpu(timestamp);
IWL_DEBUG_MAC80211("leave\n");
spin_unlock_irqrestore(&priv->lock, flags);
iwl_reset_qos(priv);
iwl_post_associate(priv);
return 0;
}
/*****************************************************************************
*
* sysfs attributes
*
*****************************************************************************/
#ifdef CONFIG_IWLWIFI_DEBUG
/*
* The following adds a new attribute to the sysfs representation
* of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
* used for controlling the debug level.
*
* See the level definitions in iwl for details.
*/
static ssize_t show_debug_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = d->driver_data;
return sprintf(buf, "0x%08X\n", priv->debug_level);
}
static ssize_t store_debug_level(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = d->driver_data;
unsigned long val;
int ret;
ret = strict_strtoul(buf, 0, &val);
if (ret)
printk(KERN_INFO DRV_NAME
": %s is not in hex or decimal form.\n", buf);
else
priv->debug_level = val;
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
show_debug_level, store_debug_level);
#endif /* CONFIG_IWLWIFI_DEBUG */
static ssize_t show_version(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = d->driver_data;
struct iwl_alive_resp *palive = &priv->card_alive;
ssize_t pos = 0;
u16 eeprom_ver;
if (palive->is_valid)
pos += sprintf(buf + pos,
"fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
"fw type: 0x%01X 0x%01X\n",
palive->ucode_major, palive->ucode_minor,
palive->sw_rev[0], palive->sw_rev[1],
palive->ver_type, palive->ver_subtype);
else
pos += sprintf(buf + pos, "fw not loaded\n");
if (priv->eeprom) {
eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
eeprom_ver);
} else {
pos += sprintf(buf + pos, "EEPROM not initialzed\n");
}
return pos;
}
static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
static ssize_t show_temperature(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
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 = (struct iwl_priv *)d->driver_data;
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 = (struct iwl_priv *)d->driver_data;
unsigned long val;
int ret;
ret = strict_strtoul(buf, 10, &val);
if (ret)
printk(KERN_INFO DRV_NAME
": %s is not in decimal form.\n", buf);
else
iwl_set_tx_power(priv, val, false);
return count;
}
static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
static ssize_t show_flags(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
}
static ssize_t store_flags(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
unsigned long val;
u32 flags;
int ret = strict_strtoul(buf, 0, &val);
if (ret)
return ret;
flags = (u32)val;
mutex_lock(&priv->mutex);
if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
/* Cancel any currently running scans... */
if (iwl_scan_cancel_timeout(priv, 100))
IWL_WARNING("Could not cancel scan.\n");
else {
IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
priv->staging_rxon.flags = cpu_to_le32(flags);
iwl_commit_rxon(priv);
}
}
mutex_unlock(&priv->mutex);
return count;
}
static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
static ssize_t show_filter_flags(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
return sprintf(buf, "0x%04X\n",
le32_to_cpu(priv->active_rxon.filter_flags));
}
static ssize_t store_filter_flags(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
unsigned long val;
u32 filter_flags;
int ret = strict_strtoul(buf, 0, &val);
if (ret)
return ret;
filter_flags = (u32)val;
mutex_lock(&priv->mutex);
if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
/* Cancel any currently running scans... */
if (iwl_scan_cancel_timeout(priv, 100))
IWL_WARNING("Could not cancel scan.\n");
else {
IWL_DEBUG_INFO("Committing rxon.filter_flags = "
"0x%04X\n", filter_flags);
priv->staging_rxon.filter_flags =
cpu_to_le32(filter_flags);
iwl_commit_rxon(priv);
}
}
mutex_unlock(&priv->mutex);
return count;
}
static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
store_filter_flags);
static ssize_t store_retry_rate(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
long val;
int ret = strict_strtol(buf, 10, &val);
if (!ret)
return ret;
priv->retry_rate = (val > 0) ? val : 1;
return count;
}
static ssize_t show_retry_rate(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
return sprintf(buf, "%d", priv->retry_rate);
}
static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
store_retry_rate);
static ssize_t store_power_level(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
int ret;
unsigned long mode;
mutex_lock(&priv->mutex);
if (!iwl_is_ready(priv)) {
ret = -EAGAIN;
goto out;
}
ret = strict_strtoul(buf, 10, &mode);
if (ret)
goto out;
ret = iwl_power_set_user_mode(priv, mode);
if (ret) {
IWL_DEBUG_MAC80211("failed setting power mode.\n");
goto out;
}
ret = count;
out:
mutex_unlock(&priv->mutex);
return ret;
}
static ssize_t show_power_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
int mode = priv->power_data.user_power_setting;
int system = priv->power_data.system_power_setting;
int level = priv->power_data.power_mode;
char *p = buf;
switch (system) {
case IWL_POWER_SYS_AUTO:
p += sprintf(p, "SYSTEM:auto");
break;
case IWL_POWER_SYS_AC:
p += sprintf(p, "SYSTEM:ac");
break;
case IWL_POWER_SYS_BATTERY:
p += sprintf(p, "SYSTEM:battery");
break;
}
p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
"fixed" : "auto");
p += sprintf(p, "\tINDEX:%d", level);
p += sprintf(p, "\n");
return p - buf + 1;
}
static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
store_power_level);
static ssize_t show_channels(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
struct ieee80211_channel *channels = NULL;
const struct ieee80211_supported_band *supp_band = NULL;
int len = 0, i;
int count = 0;
if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
return -EAGAIN;
supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
channels = supp_band->channels;
count = supp_band->n_channels;
len += sprintf(&buf[len],
"Displaying %d channels in 2.4GHz band "
"(802.11bg):\n", count);
for (i = 0; i < count; i++)
len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
ieee80211_frequency_to_channel(
channels[i].center_freq),
channels[i].max_power,
channels[i].flags & IEEE80211_CHAN_RADAR ?
" (IEEE 802.11h required)" : "",
(!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
|| (channels[i].flags &
IEEE80211_CHAN_RADAR)) ? "" :
", IBSS",
channels[i].flags &
IEEE80211_CHAN_PASSIVE_SCAN ?
"passive only" : "active/passive");
supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
channels = supp_band->channels;
count = supp_band->n_channels;
len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
"(802.11a):\n", count);
for (i = 0; i < count; i++)
len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
ieee80211_frequency_to_channel(
channels[i].center_freq),
channels[i].max_power,
channels[i].flags & IEEE80211_CHAN_RADAR ?
" (IEEE 802.11h required)" : "",
((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
|| (channels[i].flags &
IEEE80211_CHAN_RADAR)) ? "" :
", IBSS",
channels[i].flags &
IEEE80211_CHAN_PASSIVE_SCAN ?
"passive only" : "active/passive");
return len;
}
static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
static ssize_t show_statistics(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
u32 size = sizeof(struct iwl_notif_statistics);
u32 len = 0, ofs = 0;
u8 *data = (u8 *)&priv->statistics;
int rc = 0;
if (!iwl_is_alive(priv))
return -EAGAIN;
mutex_lock(&priv->mutex);
rc = iwl_send_statistics_request(priv, 0);
mutex_unlock(&priv->mutex);
if (rc) {
len = sprintf(buf,
"Error sending statistics request: 0x%08X\n", rc);
return len;
}
while (size && (PAGE_SIZE - len)) {
hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
PAGE_SIZE - len, 1);
len = strlen(buf);
if (PAGE_SIZE - len)
buf[len++] = '\n';
ofs += 16;
size -= min(size, 16U);
}
return len;
}
static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
static ssize_t show_status(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
if (!iwl_is_alive(priv))
return -EAGAIN;
return sprintf(buf, "0x%08x\n", (int)priv->status);
}
static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
/*****************************************************************************
*
* driver setup and teardown
*
*****************************************************************************/
static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
priv->workqueue = create_workqueue(DRV_NAME);
init_waitqueue_head(&priv->wait_command_queue);
INIT_WORK(&priv->up, iwl_bg_up);
INIT_WORK(&priv->restart, iwl_bg_restart);
INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
iwl_setup_scan_deferred_work(priv);
iwl_setup_power_deferred_work(priv);
if (priv->cfg->ops->lib->setup_deferred_work)
priv->cfg->ops->lib->setup_deferred_work(priv);
init_timer(&priv->statistics_periodic);
priv->statistics_periodic.data = (unsigned long)priv;
priv->statistics_periodic.function = iwl_bg_statistics_periodic;
tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
iwl_irq_tasklet, (unsigned long)priv);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
if (priv->cfg->ops->lib->cancel_deferred_work)
priv->cfg->ops->lib->cancel_deferred_work(priv);
cancel_delayed_work_sync(&priv->init_alive_start);
cancel_delayed_work(&priv->scan_check);
cancel_delayed_work_sync(&priv->set_power_save);
cancel_delayed_work(&priv->alive_start);
cancel_work_sync(&priv->beacon_update);
del_timer_sync(&priv->statistics_periodic);
}
static struct attribute *iwl_sysfs_entries[] = {
&dev_attr_channels.attr,
&dev_attr_flags.attr,
&dev_attr_filter_flags.attr,
&dev_attr_power_level.attr,
&dev_attr_retry_rate.attr,
&dev_attr_statistics.attr,
&dev_attr_status.attr,
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
#ifdef CONFIG_IWLWIFI_DEBUG
&dev_attr_debug_level.attr,
#endif
&dev_attr_version.attr,
NULL
};
static struct attribute_group iwl_attribute_group = {
.name = NULL, /* put in device directory */
.attrs = iwl_sysfs_entries,
};
static struct ieee80211_ops iwl_hw_ops = {
.tx = iwl_mac_tx,
.start = iwl_mac_start,
.stop = iwl_mac_stop,
.add_interface = iwl_mac_add_interface,
.remove_interface = iwl_mac_remove_interface,
.config = iwl_mac_config,
.config_interface = iwl_mac_config_interface,
.configure_filter = iwl_configure_filter,
.set_key = iwl_mac_set_key,
.update_tkip_key = iwl_mac_update_tkip_key,
.get_stats = iwl_mac_get_stats,
.get_tx_stats = iwl_mac_get_tx_stats,
.conf_tx = iwl_mac_conf_tx,
.reset_tsf = iwl_mac_reset_tsf,
.bss_info_changed = iwl_bss_info_changed,
.ampdu_action = iwl_mac_ampdu_action,
.hw_scan = iwl_mac_hw_scan
};
static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = 0;
struct iwl_priv *priv;
struct ieee80211_hw *hw;
struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
unsigned long flags;
/************************
* 1. Allocating HW data
************************/
/* Disabling hardware scan means that mac80211 will perform scans
* "the hard way", rather than using device's scan. */
if (cfg->mod_params->disable_hw_scan) {
if (cfg->mod_params->debug & IWL_DL_INFO)
dev_printk(KERN_DEBUG, &(pdev->dev),
"Disabling hw_scan\n");
iwl_hw_ops.hw_scan = NULL;
}
hw = iwl_alloc_all(cfg, &iwl_hw_ops);
if (!hw) {
err = -ENOMEM;
goto out;
}
priv = hw->priv;
/* At this point both hw and priv are allocated. */
SET_IEEE80211_DEV(hw, &pdev->dev);
IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
priv->cfg = cfg;
priv->pci_dev = pdev;
#ifdef CONFIG_IWLWIFI_DEBUG
priv->debug_level = priv->cfg->mod_params->debug;
atomic_set(&priv->restrict_refcnt, 0);
#endif
/**************************
* 2. Initializing PCI bus
**************************/
if (pci_enable_device(pdev)) {
err = -ENODEV;
goto out_ieee80211_free_hw;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
if (err) {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
/* both attempts failed: */
if (err) {
printk(KERN_WARNING "%s: No suitable DMA available.\n",
DRV_NAME);
goto out_pci_disable_device;
}
}
err = pci_request_regions(pdev, DRV_NAME);
if (err)
goto out_pci_disable_device;
pci_set_drvdata(pdev, priv);
/***********************
* 3. Read REV register
***********************/
priv->hw_base = pci_iomap(pdev, 0, 0);
if (!priv->hw_base) {
err = -ENODEV;
goto out_pci_release_regions;
}
IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
(unsigned long long) pci_resource_len(pdev, 0));
IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
iwl_hw_detect(priv);
printk(KERN_INFO DRV_NAME
": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
priv->cfg->name, priv->hw_rev);
/* We disable the RETRY_TIMEOUT register (0x41) to keep
* PCI Tx retries from interfering with C3 CPU state */
pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
/* amp init */
err = priv->cfg->ops->lib->apm_ops.init(priv);
if (err < 0) {
IWL_DEBUG_INFO("Failed to init APMG\n");
goto out_iounmap;
}
/*****************
* 4. Read EEPROM
*****************/
/* Read the EEPROM */
err = iwl_eeprom_init(priv);
if (err) {
IWL_ERROR("Unable to init EEPROM\n");
goto out_iounmap;
}
err = iwl_eeprom_check_version(priv);
if (err)
goto out_iounmap;
/* extract MAC Address */
iwl_eeprom_get_mac(priv, priv->mac_addr);
IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
/************************
* 5. Setup HW constants
************************/
if (iwl_set_hw_params(priv)) {
IWL_ERROR("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. Initialize module parameters
**********************************/
/* Disable radio (SW RF KILL) via parameter when loading driver */
if (priv->cfg->mod_params->disable) {
set_bit(STATUS_RF_KILL_SW, &priv->status);
IWL_DEBUG_INFO("Radio disabled.\n");
}
/********************
* 8. Setup services
********************/
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
if (err) {
IWL_ERROR("failed to create sysfs device attributes\n");
goto out_uninit_drv;
}
iwl_setup_deferred_work(priv);
iwl_setup_rx_handlers(priv);
/********************
* 9. Conclude
********************/
pci_save_state(pdev);
pci_disable_device(pdev);
/**********************************
* 10. Setup and register mac80211
**********************************/
err = iwl_setup_mac(priv);
if (err)
goto out_remove_sysfs;
err = iwl_dbgfs_register(priv, DRV_NAME);
if (err)
IWL_ERROR("failed to create debugfs files\n");
err = iwl_rfkill_init(priv);
if (err)
IWL_ERROR("Unable to initialize RFKILL system. "
"Ignoring error: %d\n", err);
iwl_power_initialize(priv);
return 0;
out_remove_sysfs:
sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
out_uninit_drv:
iwl_uninit_drv(priv);
out_free_eeprom:
iwl_eeprom_free(priv);
out_iounmap:
pci_iounmap(pdev, priv->hw_base);
out_pci_release_regions:
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
out_pci_disable_device:
pci_disable_device(pdev);
out_ieee80211_free_hw:
ieee80211_free_hw(priv->hw);
out:
return err;
}
static void __devexit iwl_pci_remove(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
unsigned long flags;
if (!priv)
return;
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
iwl_dbgfs_unregister(priv);
sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
/* ieee80211_unregister_hw call wil cause iwl_mac_stop to
* to be called and iwl_down since we are removing the device
* we need to set STATUS_EXIT_PENDING bit.
*/
set_bit(STATUS_EXIT_PENDING, &priv->status);
if (priv->mac80211_registered) {
ieee80211_unregister_hw(priv->hw);
priv->mac80211_registered = 0;
} else {
iwl_down(priv);
}
/* make sure we flush any pending irq or
* tasklet for the driver
*/
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
iwl_rfkill_unregister(priv);
iwl_dealloc_ucode_pci(priv);
if (priv->rxq.bd)
iwl_rx_queue_free(priv, &priv->rxq);
iwl_hw_txq_ctx_free(priv);
iwl_clear_stations_table(priv);
iwl_eeprom_free(priv);
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
pci_iounmap(pdev, priv->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
iwl_uninit_drv(priv);
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
ieee80211_free_hw(priv->hw);
}
#ifdef CONFIG_PM
static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
if (priv->is_open) {
set_bit(STATUS_IN_SUSPEND, &priv->status);
iwl_mac_stop(priv->hw);
priv->is_open = 1;
}
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
static int iwl_pci_resume(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
pci_set_power_state(pdev, PCI_D0);
if (priv->is_open)
iwl_mac_start(priv->hw);
clear_bit(STATUS_IN_SUSPEND, &priv->status);
return 0;
}
#endif /* CONFIG_PM */
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
/* Hardware specific file defines the PCI IDs table for that hardware module */
static struct pci_device_id iwl_hw_card_ids[] = {
#ifdef CONFIG_IWL4965
{IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
{IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
#endif /* CONFIG_IWL4965 */
#ifdef CONFIG_IWL5000
{IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
{IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
{IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
{IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
{IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
{IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
{IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
{IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
{IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
{IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
/* 5350 WiFi/WiMax */
{IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
{IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
{IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
/* 5150 Wifi/WiMax */
{IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
{IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
#endif /* CONFIG_IWL5000 */
{0}
};
MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
static struct pci_driver iwl_driver = {
.name = DRV_NAME,
.id_table = iwl_hw_card_ids,
.probe = iwl_pci_probe,
.remove = __devexit_p(iwl_pci_remove),
#ifdef CONFIG_PM
.suspend = iwl_pci_suspend,
.resume = iwl_pci_resume,
#endif
};
static int __init iwl_init(void)
{
int ret;
printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
ret = iwlagn_rate_control_register();
if (ret) {
IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = pci_register_driver(&iwl_driver);
if (ret) {
IWL_ERROR("Unable to initialize PCI module\n");
goto error_register;
}
return ret;
error_register:
iwlagn_rate_control_unregister();
return ret;
}
static void __exit iwl_exit(void)
{
pci_unregister_driver(&iwl_driver);
iwlagn_rate_control_unregister();
}
module_exit(iwl_exit);
module_init(iwl_init);
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