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linux_dsm_epyc7002/drivers/net/wireless/iwlwifi/iwl3945-base.c
Joonwoo Park e47eb6ad41 iwlwifi 3945 Fix race conditional panic. 
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-11-29 21:34:54 -05:00

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/******************************************************************************
*
* Copyright(c) 2003 - 2007 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
*
*****************************************************************************/
/*
* NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
* by defining IWL to either 3945 or 4965. The Makefile used when building
* the base targets will create base-3945.o and base-4965.o
*
* The eventual goal is to move as many of the #if IWL / #endif blocks out of
* this file and into the hardware specific implementation files (iwl-XXXX.c)
* and leave only the common (non #ifdef sprinkled) code in this file
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.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/ieee80211_radiotap.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#define IWL 3945
#include "iwlwifi.h"
#include "iwl-3945.h"
#include "iwl-helpers.h"
#ifdef CONFIG_IWLWIFI_DEBUG
u32 iwl_debug_level;
#endif
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/* module parameters */
int iwl_param_disable_hw_scan;
int iwl_param_debug;
int iwl_param_disable; /* def: enable radio */
int iwl_param_antenna; /* def: 0 = both antennas (use diversity) */
int iwl_param_hwcrypto; /* def: using software encryption */
int iwl_param_qos_enable = 1;
int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
/*
* 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) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif
#define IWLWIFI_VERSION "1.1.17k" VD VS
#define DRV_COPYRIGHT "Copyright(c) 2003-2007 Intel Corporation"
#define DRV_VERSION IWLWIFI_VERSION
/* Change firmware file name, using "-" and incrementing number,
* *only* when uCode interface or architecture changes so that it
* is not compatible with earlier drivers.
* This number will also appear in << 8 position of 1st dword of uCode file */
#define IWL3945_UCODE_API "-1"
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
__le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
{
u16 fc = le16_to_cpu(hdr->frame_control);
int hdr_len = ieee80211_get_hdrlen(fc);
if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
return NULL;
}
static const struct ieee80211_hw_mode *iwl_get_hw_mode(
struct iwl_priv *priv, int mode)
{
int i;
for (i = 0; i < 3; i++)
if (priv->modes[i].mode == mode)
return &priv->modes[i];
return NULL;
}
static int iwl_is_empty_essid(const char *essid, int essid_len)
{
/* Single white space is for Linksys APs */
if (essid_len == 1 && essid[0] == ' ')
return 1;
/* Otherwise, if the entire essid is 0, we assume it is hidden */
while (essid_len) {
essid_len--;
if (essid[essid_len] != '\0')
return 0;
}
return 1;
}
static const char *iwl_escape_essid(const char *essid, u8 essid_len)
{
static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
const char *s = essid;
char *d = escaped;
if (iwl_is_empty_essid(essid, essid_len)) {
memcpy(escaped, "<hidden>", sizeof("<hidden>"));
return escaped;
}
essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
while (essid_len--) {
if (*s == '\0') {
*d++ = '\\';
*d++ = '0';
s++;
} else
*d++ = *s++;
}
*d = '\0';
return escaped;
}
static void iwl_print_hex_dump(int level, void *p, u32 len)
{
#ifdef CONFIG_IWLWIFI_DEBUG
if (!(iwl_debug_level & level))
return;
print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
p, len, 1);
#endif
}
/*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
* DMA services
*
* Theory of operation
*
* A queue is a circular buffers with 'Read' and 'Write' pointers.
* 2 empty entries always kept in the buffer to protect from overflow.
*
* For Tx queue, there are low mark and high mark limits. If, after queuing
* the packet for Tx, free space become < low mark, Tx queue stopped. When
* reclaiming packets (on 'tx done IRQ), if free space become > high mark,
* Tx queue resumed.
*
* The IWL operates with six queues, one receive queue in the device's
* sram, one transmit queue for sending commands to the device firmware,
* and four transmit queues for data.
***************************************************/
static int iwl_queue_space(const struct iwl_queue *q)
{
int s = q->last_used - q->first_empty;
if (q->last_used > q->first_empty)
s -= q->n_bd;
if (s <= 0)
s += q->n_window;
/* keep some reserve to not confuse empty and full situations */
s -= 2;
if (s < 0)
s = 0;
return s;
}
/* XXX: n_bd must be power-of-two size */
static inline int iwl_queue_inc_wrap(int index, int n_bd)
{
return ++index & (n_bd - 1);
}
/* XXX: n_bd must be power-of-two size */
static inline int iwl_queue_dec_wrap(int index, int n_bd)
{
return --index & (n_bd - 1);
}
static inline int x2_queue_used(const struct iwl_queue *q, int i)
{
return q->first_empty > q->last_used ?
(i >= q->last_used && i < q->first_empty) :
!(i < q->last_used && i >= q->first_empty);
}
static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
{
if (is_huge)
return q->n_window;
return index & (q->n_window - 1);
}
static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
int count, int slots_num, u32 id)
{
q->n_bd = count;
q->n_window = slots_num;
q->id = id;
/* count must be power-of-two size, otherwise iwl_queue_inc_wrap
* and iwl_queue_dec_wrap are broken. */
BUG_ON(!is_power_of_2(count));
/* slots_num must be power-of-two size, otherwise
* get_cmd_index is broken. */
BUG_ON(!is_power_of_2(slots_num));
q->low_mark = q->n_window / 4;
if (q->low_mark < 4)
q->low_mark = 4;
q->high_mark = q->n_window / 8;
if (q->high_mark < 2)
q->high_mark = 2;
q->first_empty = q->last_used = 0;
return 0;
}
static int iwl_tx_queue_alloc(struct iwl_priv *priv,
struct iwl_tx_queue *txq, u32 id)
{
struct pci_dev *dev = priv->pci_dev;
if (id != IWL_CMD_QUEUE_NUM) {
txq->txb = kmalloc(sizeof(txq->txb[0]) *
TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
if (!txq->txb) {
IWL_ERROR("kmalloc for auxilary BD "
"structures failed\n");
goto error;
}
} else
txq->txb = NULL;
txq->bd = pci_alloc_consistent(dev,
sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
&txq->q.dma_addr);
if (!txq->bd) {
IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
goto error;
}
txq->q.id = id;
return 0;
error:
if (txq->txb) {
kfree(txq->txb);
txq->txb = NULL;
}
return -ENOMEM;
}
int iwl_tx_queue_init(struct iwl_priv *priv,
struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
{
struct pci_dev *dev = priv->pci_dev;
int len;
int rc = 0;
/* alocate command space + one big command for scan since scan
* command is very huge the system will not have two scan at the
* same time */
len = sizeof(struct iwl_cmd) * slots_num;
if (txq_id == IWL_CMD_QUEUE_NUM)
len += IWL_MAX_SCAN_SIZE;
txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
if (!txq->cmd)
return -ENOMEM;
rc = iwl_tx_queue_alloc(priv, txq, txq_id);
if (rc) {
pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
return -ENOMEM;
}
txq->need_update = 0;
/* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
* iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
iwl_hw_tx_queue_init(priv, txq);
return 0;
}
/**
* iwl_tx_queue_free - Deallocate DMA queue.
* @txq: Transmit queue to deallocate.
*
* Empty queue by removing and destroying all BD's.
* Free all buffers. txq itself is not freed.
*
*/
void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
{
struct iwl_queue *q = &txq->q;
struct pci_dev *dev = priv->pci_dev;
int len;
if (q->n_bd == 0)
return;
/* first, empty all BD's */
for (; q->first_empty != q->last_used;
q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
iwl_hw_txq_free_tfd(priv, txq);
len = sizeof(struct iwl_cmd) * q->n_window;
if (q->id == IWL_CMD_QUEUE_NUM)
len += IWL_MAX_SCAN_SIZE;
pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
/* free buffers belonging to queue itself */
if (txq->q.n_bd)
pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
txq->q.n_bd, txq->bd, txq->q.dma_addr);
if (txq->txb) {
kfree(txq->txb);
txq->txb = NULL;
}
/* 0 fill whole structure */
memset(txq, 0, sizeof(*txq));
}
const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
/*************** STATION TABLE MANAGEMENT ****
*
* NOTE: This needs to be overhauled to better synchronize between
* how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
*
* mac80211 should also be examined to determine if sta_info is duplicating
* the functionality provided here
*/
/**************************************************************/
#if 0 /* temparary disable till we add real remove station */
static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
int index = IWL_INVALID_STATION;
int i;
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
if (is_ap)
index = IWL_AP_ID;
else if (is_broadcast_ether_addr(addr))
index = priv->hw_setting.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
if (priv->stations[i].used &&
!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr)) {
index = i;
break;
}
if (unlikely(index == IWL_INVALID_STATION))
goto out;
if (priv->stations[index].used) {
priv->stations[index].used = 0;
priv->num_stations--;
}
BUG_ON(priv->num_stations < 0);
out:
spin_unlock_irqrestore(&priv->sta_lock, flags);
return 0;
}
#endif
static void iwl_clear_stations_table(struct iwl_priv *priv)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->num_stations = 0;
memset(priv->stations, 0, sizeof(priv->stations));
spin_unlock_irqrestore(&priv->sta_lock, flags);
}
u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
{
int i;
int index = IWL_INVALID_STATION;
struct iwl_station_entry *station;
unsigned long flags_spin;
DECLARE_MAC_BUF(mac);
u8 rate;
spin_lock_irqsave(&priv->sta_lock, flags_spin);
if (is_ap)
index = IWL_AP_ID;
else if (is_broadcast_ether_addr(addr))
index = priv->hw_setting.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr)) {
index = i;
break;
}
if (!priv->stations[i].used &&
index == IWL_INVALID_STATION)
index = i;
}
/* These twh conditions has the same outcome but keep them separate
since they have different meaning */
if (unlikely(index == IWL_INVALID_STATION)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
return index;
}
if (priv->stations[index].used &&
!compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
return index;
}
IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
station = &priv->stations[index];
station->used = 1;
priv->num_stations++;
memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
memcpy(station->sta.sta.addr, addr, ETH_ALEN);
station->sta.mode = 0;
station->sta.sta.sta_id = index;
station->sta.station_flags = 0;
rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
/* Turn on both antennas for the station... */
station->sta.rate_n_flags =
iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
station->current_rate.rate_n_flags =
le16_to_cpu(station->sta.rate_n_flags);
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
iwl_send_add_station(priv, &station->sta, flags);
return index;
}
/*************** DRIVER STATUS FUNCTIONS *****/
static inline int iwl_is_ready(struct iwl_priv *priv)
{
/* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
* set but EXIT_PENDING is not */
return test_bit(STATUS_READY, &priv->status) &&
test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
!test_bit(STATUS_EXIT_PENDING, &priv->status);
}
static inline int iwl_is_alive(struct iwl_priv *priv)
{
return test_bit(STATUS_ALIVE, &priv->status);
}
static inline int iwl_is_init(struct iwl_priv *priv)
{
return test_bit(STATUS_INIT, &priv->status);
}
static inline int iwl_is_rfkill(struct iwl_priv *priv)
{
return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
test_bit(STATUS_RF_KILL_SW, &priv->status);
}
static inline int iwl_is_ready_rf(struct iwl_priv *priv)
{
if (iwl_is_rfkill(priv))
return 0;
return iwl_is_ready(priv);
}
/*************** HOST COMMAND QUEUE FUNCTIONS *****/
#define IWL_CMD(x) case x : return #x
static const char *get_cmd_string(u8 cmd)
{
switch (cmd) {
IWL_CMD(REPLY_ALIVE);
IWL_CMD(REPLY_ERROR);
IWL_CMD(REPLY_RXON);
IWL_CMD(REPLY_RXON_ASSOC);
IWL_CMD(REPLY_QOS_PARAM);
IWL_CMD(REPLY_RXON_TIMING);
IWL_CMD(REPLY_ADD_STA);
IWL_CMD(REPLY_REMOVE_STA);
IWL_CMD(REPLY_REMOVE_ALL_STA);
IWL_CMD(REPLY_3945_RX);
IWL_CMD(REPLY_TX);
IWL_CMD(REPLY_RATE_SCALE);
IWL_CMD(REPLY_LEDS_CMD);
IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
IWL_CMD(RADAR_NOTIFICATION);
IWL_CMD(REPLY_QUIET_CMD);
IWL_CMD(REPLY_CHANNEL_SWITCH);
IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
IWL_CMD(POWER_TABLE_CMD);
IWL_CMD(PM_SLEEP_NOTIFICATION);
IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
IWL_CMD(REPLY_SCAN_CMD);
IWL_CMD(REPLY_SCAN_ABORT_CMD);
IWL_CMD(SCAN_START_NOTIFICATION);
IWL_CMD(SCAN_RESULTS_NOTIFICATION);
IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
IWL_CMD(BEACON_NOTIFICATION);
IWL_CMD(REPLY_TX_BEACON);
IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
IWL_CMD(QUIET_NOTIFICATION);
IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
IWL_CMD(MEASURE_ABORT_NOTIFICATION);
IWL_CMD(REPLY_BT_CONFIG);
IWL_CMD(REPLY_STATISTICS_CMD);
IWL_CMD(STATISTICS_NOTIFICATION);
IWL_CMD(REPLY_CARD_STATE_CMD);
IWL_CMD(CARD_STATE_NOTIFICATION);
IWL_CMD(MISSED_BEACONS_NOTIFICATION);
default:
return "UNKNOWN";
}
}
#define HOST_COMPLETE_TIMEOUT (HZ / 2)
/**
* iwl_enqueue_hcmd - enqueue a uCode command
* @priv: device private data point
* @cmd: a point to the ucode command structure
*
* The function returns < 0 values to indicate the operation is
* failed. On success, it turns the index (> 0) of command in the
* command queue.
*/
static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
struct iwl_queue *q = &txq->q;
struct iwl_tfd_frame *tfd;
u32 *control_flags;
struct iwl_cmd *out_cmd;
u32 idx;
u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
dma_addr_t phys_addr;
int pad;
u16 count;
int ret;
unsigned long flags;
/* If any of the command structures end up being larger than
* the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
* we will need to increase the size of the TFD entries */
BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
!(cmd->meta.flags & CMD_SIZE_HUGE));
if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
IWL_ERROR("No space for Tx\n");
return -ENOSPC;
}
spin_lock_irqsave(&priv->hcmd_lock, flags);
tfd = &txq->bd[q->first_empty];
memset(tfd, 0, sizeof(*tfd));
control_flags = (u32 *) tfd;
idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
out_cmd = &txq->cmd[idx];
out_cmd->hdr.cmd = cmd->id;
memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
/* At this point, the out_cmd now has all of the incoming cmd
* information */
out_cmd->hdr.flags = 0;
out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
INDEX_TO_SEQ(q->first_empty));
if (out_cmd->meta.flags & CMD_SIZE_HUGE)
out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
offsetof(struct iwl_cmd, hdr);
iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
pad = U32_PAD(cmd->len);
count = TFD_CTL_COUNT_GET(*control_flags);
*control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
"%d bytes at %d[%d]:%d\n",
get_cmd_string(out_cmd->hdr.cmd),
out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
txq->need_update = 1;
q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
ret = iwl_tx_queue_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->hcmd_lock, flags);
return ret ? ret : idx;
}
int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
int ret;
BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
/* An asynchronous command can not expect an SKB to be set. */
BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
/* An asynchronous command MUST have a callback. */
BUG_ON(!cmd->meta.u.callback);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return -EBUSY;
ret = iwl_enqueue_hcmd(priv, cmd);
if (ret < 0) {
IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
get_cmd_string(cmd->id), ret);
return ret;
}
return 0;
}
int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
int cmd_idx;
int ret;
static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
BUG_ON(cmd->meta.flags & CMD_ASYNC);
/* A synchronous command can not have a callback set. */
BUG_ON(cmd->meta.u.callback != NULL);
if (atomic_xchg(&entry, 1)) {
IWL_ERROR("Error sending %s: Already sending a host command\n",
get_cmd_string(cmd->id));
return -EBUSY;
}
set_bit(STATUS_HCMD_ACTIVE, &priv->status);
if (cmd->meta.flags & CMD_WANT_SKB)
cmd->meta.source = &cmd->meta;
cmd_idx = iwl_enqueue_hcmd(priv, cmd);
if (cmd_idx < 0) {
ret = cmd_idx;
IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
get_cmd_string(cmd->id), ret);
goto out;
}
ret = wait_event_interruptible_timeout(priv->wait_command_queue,
!test_bit(STATUS_HCMD_ACTIVE, &priv->status),
HOST_COMPLETE_TIMEOUT);
if (!ret) {
if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
IWL_ERROR("Error sending %s: time out after %dms.\n",
get_cmd_string(cmd->id),
jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
ret = -ETIMEDOUT;
goto cancel;
}
}
if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
get_cmd_string(cmd->id));
ret = -ECANCELED;
goto fail;
}
if (test_bit(STATUS_FW_ERROR, &priv->status)) {
IWL_DEBUG_INFO("Command %s failed: FW Error\n",
get_cmd_string(cmd->id));
ret = -EIO;
goto fail;
}
if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
IWL_ERROR("Error: Response NULL in '%s'\n",
get_cmd_string(cmd->id));
ret = -EIO;
goto out;
}
ret = 0;
goto out;
cancel:
if (cmd->meta.flags & CMD_WANT_SKB) {
struct iwl_cmd *qcmd;
/* Cancel the CMD_WANT_SKB flag for the cmd in the
* TX cmd queue. Otherwise in case the cmd comes
* in later, it will possibly set an invalid
* address (cmd->meta.source). */
qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
qcmd->meta.flags &= ~CMD_WANT_SKB;
}
fail:
if (cmd->meta.u.skb) {
dev_kfree_skb_any(cmd->meta.u.skb);
cmd->meta.u.skb = NULL;
}
out:
atomic_set(&entry, 0);
return ret;
}
int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
/* A command can not be asynchronous AND expect an SKB to be set. */
BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
(cmd->meta.flags & CMD_WANT_SKB));
if (cmd->meta.flags & CMD_ASYNC)
return iwl_send_cmd_async(priv, cmd);
return iwl_send_cmd_sync(priv, cmd);
}
int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
{
struct iwl_host_cmd cmd = {
.id = id,
.len = len,
.data = data,
};
return iwl_send_cmd_sync(priv, &cmd);
}
static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
{
struct iwl_host_cmd cmd = {
.id = id,
.len = sizeof(val),
.data = &val,
};
return iwl_send_cmd_sync(priv, &cmd);
}
int iwl_send_statistics_request(struct iwl_priv *priv)
{
return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
}
/**
* iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
* @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
* @channel: Any channel valid for the requested phymode
* In addition to setting the staging RXON, priv->phymode is also set.
*
* NOTE: Does not commit to the hardware; it sets appropriate bit fields
* in the staging RXON flag structure based on the phymode
*/
static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
{
if (!iwl_get_channel_info(priv, phymode, channel)) {
IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
channel, phymode);
return -EINVAL;
}
if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
(priv->phymode == phymode))
return 0;
priv->staging_rxon.channel = cpu_to_le16(channel);
if (phymode == MODE_IEEE80211A)
priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
else
priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
priv->phymode = phymode;
IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
return 0;
}
/**
* iwl_check_rxon_cmd - validate RXON structure is valid
*
* NOTE: This is really only useful during development and can eventually
* be #ifdef'd out once the driver is stable and folks aren't actively
* making changes
*/
static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
{
int error = 0;
int counter = 1;
if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
error |= le32_to_cpu(rxon->flags &
(RXON_FLG_TGJ_NARROW_BAND_MSK |
RXON_FLG_RADAR_DETECT_MSK));
if (error)
IWL_WARNING("check 24G fields %d | %d\n",
counter++, error);
} else {
error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
if (error)
IWL_WARNING("check 52 fields %d | %d\n",
counter++, error);
error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
if (error)
IWL_WARNING("check 52 CCK %d | %d\n",
counter++, error);
}
error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
if (error)
IWL_WARNING("check mac addr %d | %d\n", counter++, error);
/* make sure basic rates 6Mbps and 1Mbps are supported */
error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
if (error)
IWL_WARNING("check basic rate %d | %d\n", counter++, error);
error |= (le16_to_cpu(rxon->assoc_id) > 2007);
if (error)
IWL_WARNING("check assoc id %d | %d\n", counter++, error);
error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
if (error)
IWL_WARNING("check CCK and short slot %d | %d\n",
counter++, error);
error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
if (error)
IWL_WARNING("check CCK & auto detect %d | %d\n",
counter++, error);
error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
if (error)
IWL_WARNING("check TGG and auto detect %d | %d\n",
counter++, error);
if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
RXON_FLG_ANT_A_MSK)) == 0);
if (error)
IWL_WARNING("check antenna %d %d\n", counter++, error);
if (error)
IWL_WARNING("Tuning to channel %d\n",
le16_to_cpu(rxon->channel));
if (error) {
IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
return -1;
}
return 0;
}
/**
* iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
* @priv: staging_rxon is comapred to active_rxon
*
* If the RXON structure is changing sufficient to require a new
* tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
* to indicate a new tune is required.
*/
static int iwl_full_rxon_required(struct iwl_priv *priv)
{
/* These items are only settable from the full RXON command */
if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
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.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;
}
static int iwl_send_rxon_assoc(struct iwl_priv *priv)
{
int rc = 0;
struct iwl_rx_packet *res = NULL;
struct iwl_rxon_assoc_cmd rxon_assoc;
struct iwl_host_cmd cmd = {
.id = REPLY_RXON_ASSOC,
.len = sizeof(rxon_assoc),
.meta.flags = CMD_WANT_SKB,
.data = &rxon_assoc,
};
const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
if ((rxon1->flags == rxon2->flags) &&
(rxon1->filter_flags == rxon2->filter_flags) &&
(rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
(rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
return 0;
}
rxon_assoc.flags = priv->staging_rxon.flags;
rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
rxon_assoc.reserved = 0;
rc = iwl_send_cmd_sync(priv, &cmd);
if (rc)
return rc;
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
rc = -EIO;
}
priv->alloc_rxb_skb--;
dev_kfree_skb_any(cmd.meta.u.skb);
return rc;
}
/**
* iwl_commit_rxon - commit staging_rxon to hardware
*
* The RXON command in staging_rxon is commited 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 rc = 0;
DECLARE_MAC_BUF(mac);
if (!iwl_is_alive(priv))
return -1;
/* always get timestamp with Rx frame */
priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
/* select antenna */
priv->staging_rxon.flags &=
~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
rc = iwl_check_rxon_cmd(&priv->staging_rxon);
if (rc) {
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)) {
rc = iwl_send_rxon_assoc(priv);
if (rc) {
IWL_ERROR("Error setting RXON_ASSOC "
"configuration (%d).\n", rc);
return rc;
}
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
return 0;
}
/* If we are currently associated and the new config requires
* an RXON_ASSOC and the new config wants the associated mask enabled,
* we must clear the associated from the active configuration
* before we apply the new config */
if (iwl_is_associated(priv) &&
(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
rc = 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 (rc) {
active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
IWL_ERROR("Error clearing ASSOC_MSK on current "
"configuration (%d).\n", rc);
return rc;
}
}
IWL_DEBUG_INFO("Sending RXON\n"
"* with%s RXON_FILTER_ASSOC_MSK\n"
"* channel = %d\n"
"* bssid = %s\n",
((priv->staging_rxon.filter_flags &
RXON_FILTER_ASSOC_MSK) ? "" : "out"),
le16_to_cpu(priv->staging_rxon.channel),
print_mac(mac, priv->staging_rxon.bssid_addr));
/* Apply the new configuration */
rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
if (rc) {
IWL_ERROR("Error setting new configuration (%d).\n", rc);
return rc;
}
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
iwl_clear_stations_table(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 */
rc = iwl_hw_reg_send_txpower(priv);
if (rc) {
IWL_ERROR("Error setting Tx power (%d).\n", rc);
return rc;
}
/* Add the broadcast address so we can send broadcast frames */
if (iwl_add_station(priv, BROADCAST_ADDR, 0, 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 (iwl_is_associated(priv) &&
(priv->iw_mode == IEEE80211_IF_TYPE_STA))
if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
== IWL_INVALID_STATION) {
IWL_ERROR("Error adding AP address for transmit.\n");
return -EIO;
}
/* Init the hardware's rate fallback order based on the
* phymode */
rc = iwl3945_init_hw_rate_table(priv);
if (rc) {
IWL_ERROR("Error setting HW rate table: %02X\n", rc);
return -EIO;
}
return 0;
}
static int iwl_send_bt_config(struct iwl_priv *priv)
{
struct iwl_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 iwl_bt_cmd), &bt_cmd);
}
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
int rc = 0;
struct iwl_rx_packet *res;
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_ABORT_CMD,
.meta.flags = CMD_WANT_SKB,
};
/* If there isn't a scan actively going on in the hardware
* then we are in between scan bands and not actually
* actively scanning, so don't send the abort command */
if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
return 0;
}
rc = iwl_send_cmd_sync(priv, &cmd);
if (rc) {
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
return rc;
}
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->u.status != CAN_ABORT_STATUS) {
/* The scan abort will return 1 for success or
* 2 for "failure". A failure condition can be
* due to simply not being in an active scan which
* can occur if we send the scan abort before we
* the microcode has notified us that a scan is
* completed. */
IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
clear_bit(STATUS_SCAN_HW, &priv->status);
}
dev_kfree_skb_any(cmd.meta.u.skb);
return rc;
}
static int iwl_card_state_sync_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd,
struct sk_buff *skb)
{
return 1;
}
/*
* CARD_STATE_CMD
*
* Use: Sets the internal card state to enable, disable, or halt
*
* When in the 'enable' state the card operates as normal.
* When in the 'disable' state, the card enters into a low power mode.
* When in the 'halt' state, the card is shut down and must be fully
* restarted to come back on.
*/
static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
{
struct iwl_host_cmd cmd = {
.id = REPLY_CARD_STATE_CMD,
.len = sizeof(u32),
.data = &flags,
.meta.flags = meta_flag,
};
if (meta_flag & CMD_ASYNC)
cmd.meta.u.callback = iwl_card_state_sync_callback;
return iwl_send_cmd(priv, &cmd);
}
static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd, struct sk_buff *skb)
{
struct iwl_rx_packet *res = NULL;
if (!skb) {
IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
return 1;
}
res = (struct iwl_rx_packet *)skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
res->hdr.flags);
return 1;
}
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
break;
default:
break;
}
/* We didn't cache the SKB; let the caller free it */
return 1;
}
int iwl_send_add_station(struct iwl_priv *priv,
struct iwl_addsta_cmd *sta, u8 flags)
{
struct iwl_rx_packet *res = NULL;
int rc = 0;
struct iwl_host_cmd cmd = {
.id = REPLY_ADD_STA,
.len = sizeof(struct iwl_addsta_cmd),
.meta.flags = flags,
.data = sta,
};
if (flags & CMD_ASYNC)
cmd.meta.u.callback = iwl_add_sta_sync_callback;
else
cmd.meta.flags |= CMD_WANT_SKB;
rc = iwl_send_cmd(priv, &cmd);
if (rc || (flags & CMD_ASYNC))
return rc;
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
res->hdr.flags);
rc = -EIO;
}
if (rc == 0) {
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
break;
default:
rc = -EIO;
IWL_WARNING("REPLY_ADD_STA failed\n");
break;
}
}
priv->alloc_rxb_skb--;
dev_kfree_skb_any(cmd.meta.u.skb);
return rc;
}
static int iwl_update_sta_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
switch (keyconf->alg) {
case ALG_CCMP:
key_flags |= STA_KEY_FLG_CCMP;
key_flags |= cpu_to_le16(
keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
break;
case ALG_TKIP:
case ALG_WEP:
return -EINVAL;
default:
return -EINVAL;
}
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
keyconf->keylen);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
keyconf->keylen);
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
return 0;
}
static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
return 0;
}
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);
}
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 != IEEE80211_IF_TYPE_IBSS) &&
(priv->iw_mode != IEEE80211_IF_TYPE_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 int iwl_rate_index_from_plcp(int plcp)
{
int i = 0;
for (i = 0; i < IWL_RATE_COUNT; i++)
if (iwl_rates[i].plcp == plcp)
return i;
return -1;
}
static u8 iwl_rate_get_lowest_plcp(int rate_mask)
{
u8 i;
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;
}
return IWL_RATE_INVALID;
}
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;
}
if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
0xFF0);
if (rate == IWL_INVALID_RATE)
rate = IWL_RATE_6M_PLCP;
} else {
rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
if (rate == IWL_INVALID_RATE)
rate = IWL_RATE_1M_PLCP;
}
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;
}
/******************************************************************************
*
* EEPROM related functions
*
******************************************************************************/
static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
{
memcpy(mac, priv->eeprom.mac_address, 6);
}
/**
* iwl_eeprom_init - read EEPROM contents
*
* Load the EEPROM from adapter into priv->eeprom
*
* NOTE: This routine uses the non-debug IO access functions.
*/
int iwl_eeprom_init(struct iwl_priv *priv)
{
u16 *e = (u16 *)&priv->eeprom;
u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
u32 r;
int sz = sizeof(priv->eeprom);
int rc;
int i;
u16 addr;
/* The EEPROM structure has several padding buffers within it
* and when adding new EEPROM maps is subject to programmer errors
* which may be very difficult to identify without explicitly
* checking the resulting size of the eeprom map. */
BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
return -ENOENT;
}
rc = iwl_eeprom_aqcuire_semaphore(priv);
if (rc < 0) {
IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
return -ENOENT;
}
/* eeprom is an array of 16bit values */
for (addr = 0; addr < sz; addr += sizeof(u16)) {
_iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
_iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
i += IWL_EEPROM_ACCESS_DELAY) {
r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
if (r & CSR_EEPROM_REG_READ_VALID_MSK)
break;
udelay(IWL_EEPROM_ACCESS_DELAY);
}
if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
IWL_ERROR("Time out reading EEPROM[%d]", addr);
return -ETIMEDOUT;
}
e[addr / 2] = le16_to_cpu(r >> 16);
}
return 0;
}
/******************************************************************************
*
* Misc. internal state and helper functions
*
******************************************************************************/
#ifdef CONFIG_IWLWIFI_DEBUG
/**
* iwl_report_frame - dump frame to syslog during debug sessions
*
* hack this function to show different aspects of received frames,
* including selective frame dumps.
* group100 parameter selects whether to show 1 out of 100 good frames.
*
* TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
* info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
* is 3945-specific and gives bad output for 4965. Need to split the
* functionality, keep common stuff here.
*/
void iwl_report_frame(struct iwl_priv *priv,
struct iwl_rx_packet *pkt,
struct ieee80211_hdr *header, int group100)
{
u32 to_us;
u32 print_summary = 0;
u32 print_dump = 0; /* set to 1 to dump all frames' contents */
u32 hundred = 0;
u32 dataframe = 0;
u16 fc;
u16 seq_ctl;
u16 channel;
u16 phy_flags;
int rate_sym;
u16 length;
u16 status;
u16 bcn_tmr;
u32 tsf_low;
u64 tsf;
u8 rssi;
u8 agc;
u16 sig_avg;
u16 noise_diff;
struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
u8 *data = IWL_RX_DATA(pkt);
/* MAC header */
fc = le16_to_cpu(header->frame_control);
seq_ctl = le16_to_cpu(header->seq_ctrl);
/* metadata */
channel = le16_to_cpu(rx_hdr->channel);
phy_flags = le16_to_cpu(rx_hdr->phy_flags);
rate_sym = rx_hdr->rate;
length = le16_to_cpu(rx_hdr->len);
/* end-of-frame status and timestamp */
status = le32_to_cpu(rx_end->status);
bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
tsf = le64_to_cpu(rx_end->timestamp);
/* signal statistics */
rssi = rx_stats->rssi;
agc = rx_stats->agc;
sig_avg = le16_to_cpu(rx_stats->sig_avg);
noise_diff = le16_to_cpu(rx_stats->noise_diff);
to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
/* if data frame is to us and all is good,
* (optionally) print summary for only 1 out of every 100 */
if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
dataframe = 1;
if (!group100)
print_summary = 1; /* print each frame */
else if (priv->framecnt_to_us < 100) {
priv->framecnt_to_us++;
print_summary = 0;
} else {
priv->framecnt_to_us = 0;
print_summary = 1;
hundred = 1;
}
} else {
/* print summary for all other frames */
print_summary = 1;
}
if (print_summary) {
char *title;
u32 rate;
if (hundred)
title = "100Frames";
else if (fc & IEEE80211_FCTL_RETRY)
title = "Retry";
else if (ieee80211_is_assoc_response(fc))
title = "AscRsp";
else if (ieee80211_is_reassoc_response(fc))
title = "RasRsp";
else if (ieee80211_is_probe_response(fc)) {
title = "PrbRsp";
print_dump = 1; /* dump frame contents */
} else if (ieee80211_is_beacon(fc)) {
title = "Beacon";
print_dump = 1; /* dump frame contents */
} else if (ieee80211_is_atim(fc))
title = "ATIM";
else if (ieee80211_is_auth(fc))
title = "Auth";
else if (ieee80211_is_deauth(fc))
title = "DeAuth";
else if (ieee80211_is_disassoc(fc))
title = "DisAssoc";
else
title = "Frame";
rate = iwl_rate_index_from_plcp(rate_sym);
if (rate == -1)
rate = 0;
else
rate = iwl_rates[rate].ieee / 2;
/* print frame summary.
* MAC addresses show just the last byte (for brevity),
* but you can hack it to show more, if you'd like to. */
if (dataframe)
IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
"len=%u, rssi=%d, chnl=%d, rate=%u, \n",
title, fc, header->addr1[5],
length, rssi, channel, rate);
else {
/* src/dst addresses assume managed mode */
IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
"src=0x%02x, rssi=%u, tim=%lu usec, "
"phy=0x%02x, chnl=%d\n",
title, fc, header->addr1[5],
header->addr3[5], rssi,
tsf_low - priv->scan_start_tsf,
phy_flags, channel);
}
}
if (print_dump)
iwl_print_hex_dump(IWL_DL_RX, data, length);
}
#endif
static void iwl_unset_hw_setting(struct iwl_priv *priv)
{
if (priv->hw_setting.shared_virt)
pci_free_consistent(priv->pci_dev,
sizeof(struct iwl_shared),
priv->hw_setting.shared_virt,
priv->hw_setting.shared_phys);
}
/**
* iwl_supported_rate_to_ie - fill in the supported rate in IE field
*
* return : set the bit for each supported rate insert in ie
*/
static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
u16 basic_rate, int *left)
{
u16 ret_rates = 0, bit;
int i;
u8 *cnt = ie;
u8 *rates = ie + 1;
for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
if (bit & supported_rate) {
ret_rates |= bit;
rates[*cnt] = iwl_rates[i].ieee |
((bit & basic_rate) ? 0x80 : 0x00);
(*cnt)++;
(*left)--;
if ((*left <= 0) ||
(*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
break;
}
}
return ret_rates;
}
/**
* iwl_fill_probe_req - fill in all required fields and IE for probe request
*/
static u16 iwl_fill_probe_req(struct iwl_priv *priv,
struct ieee80211_mgmt *frame,
int left, int is_direct)
{
int len = 0;
u8 *pos = NULL;
u16 active_rates, ret_rates, cck_rates;
/* Make sure there is enough space for the probe request,
* two mandatory IEs and the data */
left -= 24;
if (left < 0)
return 0;
len += 24;
frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
frame->seq_ctrl = 0;
/* fill in our indirect SSID IE */
/* ...next IE... */
left -= 2;
if (left < 0)
return 0;
len += 2;
pos = &(frame->u.probe_req.variable[0]);
*pos++ = WLAN_EID_SSID;
*pos++ = 0;
/* fill in our direct SSID IE... */
if (is_direct) {
/* ...next IE... */
left -= 2 + priv->essid_len;
if (left < 0)
return 0;
/* ... fill it in... */
*pos++ = WLAN_EID_SSID;
*pos++ = priv->essid_len;
memcpy(pos, priv->essid, priv->essid_len);
pos += priv->essid_len;
len += 2 + priv->essid_len;
}
/* fill in supported rate */
/* ...next IE... */
left -= 2;
if (left < 0)
return 0;
/* ... fill it in... */
*pos++ = WLAN_EID_SUPP_RATES;
*pos = 0;
priv->active_rate = priv->rates_mask;
active_rates = priv->active_rate;
priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
cck_rates = IWL_CCK_RATES_MASK & active_rates;
ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
priv->active_rate_basic, &left);
active_rates &= ~ret_rates;
ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
priv->active_rate_basic, &left);
active_rates &= ~ret_rates;
len += 2 + *pos;
pos += (*pos) + 1;
if (active_rates == 0)
goto fill_end;
/* fill in supported extended rate */
/* ...next IE... */
left -= 2;
if (left < 0)
return 0;
/* ... fill it in... */
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos = 0;
iwl_supported_rate_to_ie(pos, active_rates,
priv->active_rate_basic, &left);
if (*pos > 0)
len += 2 + *pos;
fill_end:
return (u16)len;
}
/*
* QoS support
*/
#ifdef CONFIG_IWLWIFI_QOS
static int iwl_send_qos_params_command(struct iwl_priv *priv,
struct iwl_qosparam_cmd *qos)
{
return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
sizeof(struct iwl_qosparam_cmd), qos);
}
static void iwl_reset_qos(struct iwl_priv *priv)
{
u16 cw_min = 15;
u16 cw_max = 1023;
u8 aifs = 2;
u8 is_legacy = 0;
unsigned long flags;
int i;
spin_lock_irqsave(&priv->lock, flags);
priv->qos_data.qos_active = 0;
if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
if (priv->qos_data.qos_enable)
priv->qos_data.qos_active = 1;
if (!(priv->active_rate & 0xfff0)) {
cw_min = 31;
is_legacy = 1;
}
} else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
if (priv->qos_data.qos_enable)
priv->qos_data.qos_active = 1;
} else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
cw_min = 31;
is_legacy = 1;
}
if (priv->qos_data.qos_active)
aifs = 3;
priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
if (priv->qos_data.qos_active) {
i = 1;
priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
i = 2;
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16((cw_min + 1) / 2 - 1);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
if (is_legacy)
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(6016);
else
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(3008);
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
i = 3;
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16((cw_min + 1) / 4 - 1);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16((cw_max + 1) / 2 - 1);
priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
if (is_legacy)
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(3264);
else
priv->qos_data.def_qos_parm.ac[i].edca_txop =
cpu_to_le16(1504);
} else {
for (i = 1; i < 4; i++) {
priv->qos_data.def_qos_parm.ac[i].cw_min =
cpu_to_le16(cw_min);
priv->qos_data.def_qos_parm.ac[i].cw_max =
cpu_to_le16(cw_max);
priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
}
}
IWL_DEBUG_QOS("set QoS to default \n");
spin_unlock_irqrestore(&priv->lock, flags);
}
static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
unsigned long flags;
if (priv == NULL)
return;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!priv->qos_data.qos_enable)
return;
spin_lock_irqsave(&priv->lock, flags);
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;
spin_unlock_irqrestore(&priv->lock, flags);
if (force || iwl_is_associated(priv)) {
IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
priv->qos_data.qos_active);
iwl_send_qos_params_command(priv,
&(priv->qos_data.def_qos_parm));
}
}
#endif /* CONFIG_IWLWIFI_QOS */
/*
* Power management (not Tx power!) functions
*/
#define MSEC_TO_USEC 1024
#define NOSLP __constant_cpu_to_le32(0)
#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
#define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
__constant_cpu_to_le32(X1), \
__constant_cpu_to_le32(X2), \
__constant_cpu_to_le32(X3), \
__constant_cpu_to_le32(X4)}
/* default power management (not Tx power) table values */
/* for tim 0-10 */
static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
};
/* for tim > 10 */
static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
{{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
{{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
{{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
{{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
};
int iwl_power_init_handle(struct iwl_priv *priv)
{
int rc = 0, i;
struct iwl_power_mgr *pow_data;
int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
u16 pci_pm;
IWL_DEBUG_POWER("Initialize power \n");
pow_data = &(priv->power_data);
memset(pow_data, 0, sizeof(*pow_data));
pow_data->active_index = IWL_POWER_RANGE_0;
pow_data->dtim_val = 0xffff;
memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
if (rc != 0)
return 0;
else {
struct iwl_powertable_cmd *cmd;
IWL_DEBUG_POWER("adjust power command flags\n");
for (i = 0; i < IWL_POWER_AC; i++) {
cmd = &pow_data->pwr_range_0[i].cmd;
if (pci_pm & 0x1)
cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
else
cmd->flags |= IWL_POWER_PCI_PM_MSK;
}
}
return rc;
}
static int iwl_update_power_cmd(struct iwl_priv *priv,
struct iwl_powertable_cmd *cmd, u32 mode)
{
int rc = 0, i;
u8 skip;
u32 max_sleep = 0;
struct iwl_power_vec_entry *range;
u8 period = 0;
struct iwl_power_mgr *pow_data;
if (mode > IWL_POWER_INDEX_5) {
IWL_DEBUG_POWER("Error invalid power mode \n");
return -1;
}
pow_data = &(priv->power_data);
if (pow_data->active_index == IWL_POWER_RANGE_0)
range = &pow_data->pwr_range_0[0];
else
range = &pow_data->pwr_range_1[1];
memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
#ifdef IWL_MAC80211_DISABLE
if (priv->assoc_network != NULL) {
unsigned long flags;
period = priv->assoc_network->tim.tim_period;
}
#endif /*IWL_MAC80211_DISABLE */
skip = range[mode].no_dtim;
if (period == 0) {
period = 1;
skip = 0;
}
if (skip == 0) {
max_sleep = period;
cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
} else {
__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
}
for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
}
IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
le32_to_cpu(cmd->sleep_interval[0]),
le32_to_cpu(cmd->sleep_interval[1]),
le32_to_cpu(cmd->sleep_interval[2]),
le32_to_cpu(cmd->sleep_interval[3]),
le32_to_cpu(cmd->sleep_interval[4]));
return rc;
}
static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
{
u32 final_mode = mode;
int rc;
struct iwl_powertable_cmd cmd;
/* If on battery, set to 3,
* if plugged into AC power, set to CAM ("continuosly aware mode"),
* else user level */
switch (mode) {
case IWL_POWER_BATTERY:
final_mode = IWL_POWER_INDEX_3;
break;
case IWL_POWER_AC:
final_mode = IWL_POWER_MODE_CAM;
break;
default:
final_mode = mode;
break;
}
iwl_update_power_cmd(priv, &cmd, final_mode);
rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
if (final_mode == IWL_POWER_MODE_CAM)
clear_bit(STATUS_POWER_PMI, &priv->status);
else
set_bit(STATUS_POWER_PMI, &priv->status);
return rc;
}
int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
{
/* Filter incoming packets to determine if they are targeted toward
* this network, discarding packets coming from ourselves */
switch (priv->iw_mode) {
case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
/* packets from our adapter are dropped (echo) */
if (!compare_ether_addr(header->addr2, priv->mac_addr))
return 0;
/* {broad,multi}cast packets to our IBSS go through */
if (is_multicast_ether_addr(header->addr1))
return !compare_ether_addr(header->addr3, priv->bssid);
/* packets to our adapter go through */
return !compare_ether_addr(header->addr1, priv->mac_addr);
case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
/* packets from our adapter are dropped (echo) */
if (!compare_ether_addr(header->addr3, priv->mac_addr))
return 0;
/* {broad,multi}cast packets to our BSS go through */
if (is_multicast_ether_addr(header->addr1))
return !compare_ether_addr(header->addr2, priv->bssid);
/* packets to our adapter go through */
return !compare_ether_addr(header->addr1, priv->mac_addr);
}
return 1;
}
#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
const char *iwl_get_tx_fail_reason(u32 status)
{
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
return "SUCCESS";
TX_STATUS_ENTRY(SHORT_LIMIT);
TX_STATUS_ENTRY(LONG_LIMIT);
TX_STATUS_ENTRY(FIFO_UNDERRUN);
TX_STATUS_ENTRY(MGMNT_ABORT);
TX_STATUS_ENTRY(NEXT_FRAG);
TX_STATUS_ENTRY(LIFE_EXPIRE);
TX_STATUS_ENTRY(DEST_PS);
TX_STATUS_ENTRY(ABORTED);
TX_STATUS_ENTRY(BT_RETRY);
TX_STATUS_ENTRY(STA_INVALID);
TX_STATUS_ENTRY(FRAG_DROPPED);
TX_STATUS_ENTRY(TID_DISABLE);
TX_STATUS_ENTRY(FRAME_FLUSHED);
TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
TX_STATUS_ENTRY(TX_LOCKED);
TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
}
return "UNKNOWN";
}
/**
* iwl_scan_cancel - Cancel any currently executing HW scan
*
* NOTE: priv->mutex is not required before calling this function
*/
static int iwl_scan_cancel(struct iwl_priv *priv)
{
if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
clear_bit(STATUS_SCANNING, &priv->status);
return 0;
}
if (test_bit(STATUS_SCANNING, &priv->status)) {
if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN("Queuing scan abort.\n");
set_bit(STATUS_SCAN_ABORTING, &priv->status);
queue_work(priv->workqueue, &priv->abort_scan);
} else
IWL_DEBUG_SCAN("Scan abort already in progress.\n");
return test_bit(STATUS_SCANNING, &priv->status);
}
return 0;
}
/**
* iwl_scan_cancel_timeout - Cancel any currently executing HW scan
* @ms: amount of time to wait (in milliseconds) for scan to abort
*
* NOTE: priv->mutex must be held before calling this function
*/
static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
{
unsigned long now = jiffies;
int ret;
ret = iwl_scan_cancel(priv);
if (ret && ms) {
mutex_unlock(&priv->mutex);
while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
test_bit(STATUS_SCANNING, &priv->status))
msleep(1);
mutex_lock(&priv->mutex);
return test_bit(STATUS_SCANNING, &priv->status);
}
return ret;
}
static void iwl_sequence_reset(struct iwl_priv *priv)
{
/* Reset ieee stats */
/* We don't reset the net_device_stats (ieee->stats) on
* re-association */
priv->last_seq_num = -1;
priv->last_frag_num = -1;
priv->last_packet_time = 0;
iwl_scan_cancel(priv);
}
#define MAX_UCODE_BEACON_INTERVAL 1024
#define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
static __le16 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 cpu_to_le16(new_val);
}
static void iwl_setup_rxon_timing(struct iwl_priv *priv)
{
u64 interval_tm_unit;
u64 tsf, result;
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.dw[1] = cpu_to_le32(priv->timestamp1);
priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
tsf = priv->timestamp1;
tsf = ((tsf << 32) | priv->timestamp0);
beacon_int = priv->beacon_int;
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
if (beacon_int == 0) {
priv->rxon_timing.beacon_interval = cpu_to_le16(100);
priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
} else {
priv->rxon_timing.beacon_interval =
cpu_to_le16(beacon_int);
priv->rxon_timing.beacon_interval =
iwl_adjust_beacon_interval(
le16_to_cpu(priv->rxon_timing.beacon_interval));
}
priv->rxon_timing.atim_window = 0;
} else {
priv->rxon_timing.beacon_interval =
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;
}
interval_tm_unit =
(le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
result = do_div(tsf, interval_tm_unit);
priv->rxon_timing.beacon_init_val =
cpu_to_le32((u32) ((u64) interval_tm_unit - result));
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 int iwl_scan_initiate(struct iwl_priv *priv)
{
if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
IWL_ERROR("APs don't scan.\n");
return 0;
}
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
return -EIO;
}
if (test_bit(STATUS_SCANNING, &priv->status)) {
IWL_DEBUG_SCAN("Scan already in progress.\n");
return -EAGAIN;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN("Scan request while abort pending. "
"Queuing.\n");
return -EAGAIN;
}
IWL_DEBUG_INFO("Starting scan...\n");
priv->scan_bands = 2;
set_bit(STATUS_SCANNING, &priv->status);
priv->scan_start = jiffies;
priv->scan_pass_start = priv->scan_start;
queue_work(priv->workqueue, &priv->request_scan);
return 0;
}
static int 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;
return 0;
}
static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
{
if (phymode == MODE_IEEE80211A) {
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_bg_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 == IEEE80211_IF_TYPE_IBSS)
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;
}
}
/*
* initilize rxon structure with default values fromm eeprom
*/
static void iwl_connection_init_rx_config(struct iwl_priv *priv)
{
const struct iwl_channel_info *ch_info;
memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
switch (priv->iw_mode) {
case IEEE80211_IF_TYPE_AP:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
break;
case IEEE80211_IF_TYPE_STA:
priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
break;
case IEEE80211_IF_TYPE_IBSS:
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 IEEE80211_IF_TYPE_MNTR:
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;
}
#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->phymode,
le16_to_cpu(priv->staging_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 == IEEE80211_IF_TYPE_IBSS) &&
!(is_channel_ibss(ch_info)))
ch_info = &priv->channel_info[0];
priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
if (is_channel_a_band(ch_info))
priv->phymode = MODE_IEEE80211A;
else
priv->phymode = MODE_IEEE80211G;
iwl_set_flags_for_phymode(priv, priv->phymode);
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;
}
static int iwl_set_mode(struct iwl_priv *priv, int mode)
{
if (!iwl_is_ready_rf(priv))
return -EAGAIN;
if (mode == IEEE80211_IF_TYPE_IBSS) {
const struct iwl_channel_info *ch_info;
ch_info = iwl_get_channel_info(priv,
priv->phymode,
le16_to_cpu(priv->staging_rxon.channel));
if (!ch_info || !is_channel_ibss(ch_info)) {
IWL_ERROR("channel %d not IBSS channel\n",
le16_to_cpu(priv->staging_rxon.channel));
return -EINVAL;
}
}
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;
}
priv->iw_mode = mode;
iwl_connection_init_rx_config(priv);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
iwl_clear_stations_table(priv);
iwl_commit_rxon(priv);
return 0;
}
static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
struct ieee80211_tx_control *ctl,
struct iwl_cmd *cmd,
struct sk_buff *skb_frag,
int last_frag)
{
struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
switch (keyinfo->alg) {
case ALG_CCMP:
cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
break;
case ALG_TKIP:
#if 0
cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
if (last_frag)
memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
8);
else
memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
#endif
break;
case ALG_WEP:
cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
(ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
if (keyinfo->keylen == 13)
cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
IWL_DEBUG_TX("Configuring packet for WEP encryption "
"with key %d\n", ctl->key_idx);
break;
default:
printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
break;
}
}
/*
* handle build REPLY_TX command notification.
*/
static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
struct iwl_cmd *cmd,
struct ieee80211_tx_control *ctrl,
struct ieee80211_hdr *hdr,
int is_unicast, u8 std_id)
{
__le16 *qc;
u16 fc = le16_to_cpu(hdr->frame_control);
__le32 tx_flags = cmd->cmd.tx.tx_flags;
cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ieee80211_is_probe_response(fc) &&
!(le16_to_cpu(hdr->seq_ctrl) & 0xf))
tx_flags |= TX_CMD_FLG_TSF_MSK;
} else {
tx_flags &= (~TX_CMD_FLG_ACK_MSK);
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
cmd->cmd.tx.sta_id = std_id;
if (ieee80211_get_morefrag(hdr))
tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
qc = ieee80211_get_qos_ctrl(hdr);
if (qc) {
cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
} else
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
tx_flags |= TX_CMD_FLG_RTS_MSK;
tx_flags &= ~TX_CMD_FLG_CTS_MSK;
} else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
tx_flags &= ~TX_CMD_FLG_RTS_MSK;
tx_flags |= TX_CMD_FLG_CTS_MSK;
}
if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
(fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
cmd->cmd.tx.timeout.pm_frame_timeout =
cpu_to_le16(3);
else
cmd->cmd.tx.timeout.pm_frame_timeout =
cpu_to_le16(2);
} else
cmd->cmd.tx.timeout.pm_frame_timeout = 0;
cmd->cmd.tx.driver_txop = 0;
cmd->cmd.tx.tx_flags = tx_flags;
cmd->cmd.tx.next_frame_len = 0;
}
static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
{
int sta_id;
u16 fc = le16_to_cpu(hdr->frame_control);
/* If this frame is broadcast or not data then use the broadcast
* station id */
if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
is_multicast_ether_addr(hdr->addr1))
return priv->hw_setting.bcast_sta_id;
switch (priv->iw_mode) {
/* If this frame is part of a BSS network (we're a station), then
* we use the AP's station id */
case IEEE80211_IF_TYPE_STA:
return IWL_AP_ID;
/* If we are an AP, then find the station, or use BCAST */
case IEEE80211_IF_TYPE_AP:
sta_id = iwl_hw_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
return priv->hw_setting.bcast_sta_id;
/* If this frame is part of a IBSS network, then we use the
* target specific station id */
case IEEE80211_IF_TYPE_IBSS: {
DECLARE_MAC_BUF(mac);
sta_id = iwl_hw_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
IWL_DEBUG_DROP("Station %s not in station map. "
"Defaulting to broadcast...\n",
print_mac(mac, hdr->addr1));
iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
return priv->hw_setting.bcast_sta_id;
}
default:
IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
return priv->hw_setting.bcast_sta_id;
}
}
/*
* start REPLY_TX command process
*/
static int iwl_tx_skb(struct iwl_priv *priv,
struct sk_buff *skb, struct ieee80211_tx_control *ctl)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct iwl_tfd_frame *tfd;
u32 *control_flags;
int txq_id = ctl->queue;
struct iwl_tx_queue *txq = NULL;
struct iwl_queue *q = NULL;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
struct iwl_cmd *out_cmd = NULL;
u16 len, idx, len_org;
u8 id, hdr_len, unicast;
u8 sta_id;
u16 seq_number = 0;
u16 fc;
__le16 *qc;
u8 wait_write_ptr = 0;
unsigned long flags;
int rc;
spin_lock_irqsave(&priv->lock, flags);
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_DROP("Dropping - RF KILL\n");
goto drop_unlock;
}
if (!priv->interface_id) {
IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
goto drop_unlock;
}
if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
IWL_ERROR("ERROR: No TX rate available.\n");
goto drop_unlock;
}
unicast = !is_multicast_ether_addr(hdr->addr1);
id = 0;
fc = le16_to_cpu(hdr->frame_control);
#ifdef CONFIG_IWLWIFI_DEBUG
if (ieee80211_is_auth(fc))
IWL_DEBUG_TX("Sending AUTH frame\n");
else if (ieee80211_is_assoc_request(fc))
IWL_DEBUG_TX("Sending ASSOC frame\n");
else if (ieee80211_is_reassoc_request(fc))
IWL_DEBUG_TX("Sending REASSOC frame\n");
#endif
if (!iwl_is_associated(priv) &&
((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
goto drop_unlock;
}
spin_unlock_irqrestore(&priv->lock, flags);
hdr_len = ieee80211_get_hdrlen(fc);
sta_id = iwl_get_sta_id(priv, hdr);
if (sta_id == IWL_INVALID_STATION) {
DECLARE_MAC_BUF(mac);
IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
print_mac(mac, hdr->addr1));
goto drop;
}
IWL_DEBUG_RATE("station Id %d\n", sta_id);
qc = ieee80211_get_qos_ctrl(hdr);
if (qc) {
u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
seq_number = priv->stations[sta_id].tid[tid].seq_number &
IEEE80211_SCTL_SEQ;
hdr->seq_ctrl = cpu_to_le16(seq_number) |
(hdr->seq_ctrl &
__constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
seq_number += 0x10;
}
txq = &priv->txq[txq_id];
q = &txq->q;
spin_lock_irqsave(&priv->lock, flags);
tfd = &txq->bd[q->first_empty];
memset(tfd, 0, sizeof(*tfd));
control_flags = (u32 *) tfd;
idx = get_cmd_index(q, q->first_empty, 0);
memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
txq->txb[q->first_empty].skb[0] = skb;
memcpy(&(txq->txb[q->first_empty].status.control),
ctl, sizeof(struct ieee80211_tx_control));
out_cmd = &txq->cmd[idx];
memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
out_cmd->hdr.cmd = REPLY_TX;
out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
INDEX_TO_SEQ(q->first_empty)));
/* copy frags header */
memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
/* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
len = priv->hw_setting.tx_cmd_len +
sizeof(struct iwl_cmd_header) + hdr_len;
len_org = len;
len = (len + 3) & ~3;
if (len_org != len)
len_org = 1;
else
len_org = 0;
txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
offsetof(struct iwl_cmd, hdr);
iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
/* 802.11 null functions have no payload... */
len = skb->len - hdr_len;
if (len) {
phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
len, PCI_DMA_TODEVICE);
iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
}
/* If there is no payload, then only one TFD is used */
if (!len)
*control_flags = TFD_CTL_COUNT_SET(1);
else
*control_flags = TFD_CTL_COUNT_SET(2) |
TFD_CTL_PAD_SET(U32_PAD(len));
len = (u16)skb->len;
out_cmd->cmd.tx.len = cpu_to_le16(len);
/* TODO need this for burst mode later on */
iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
/* set is_hcca to 0; it probably will never be implemented */
iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
if (!ieee80211_get_morefrag(hdr)) {
txq->need_update = 1;
if (qc) {
u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
priv->stations[sta_id].tid[tid].seq_number = seq_number;
}
} else {
wait_write_ptr = 1;
txq->need_update = 0;
}
iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
sizeof(out_cmd->cmd.tx));
iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
ieee80211_get_hdrlen(fc));
q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
rc = iwl_tx_queue_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->lock, flags);
if (rc)
return rc;
if ((iwl_queue_space(q) < q->high_mark)
&& priv->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&priv->lock, flags);
txq->need_update = 1;
iwl_tx_queue_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->lock, flags);
}
ieee80211_stop_queue(priv->hw, ctl->queue);
}
return 0;
drop_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
drop:
return -1;
}
static void iwl_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_hw_mode *hw = NULL;
struct ieee80211_rate *rate;
int i;
hw = iwl_get_hw_mode(priv, priv->phymode);
if (!hw) {
IWL_ERROR("Failed to set rate: unable to get hw mode\n");
return;
}
priv->active_rate = 0;
priv->active_rate_basic = 0;
IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
hw->mode == MODE_IEEE80211A ?
'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
for (i = 0; i < hw->num_rates; i++) {
rate = &(hw->rates[i]);
if ((rate->val < IWL_RATE_COUNT) &&
(rate->flags & IEEE80211_RATE_SUPPORTED)) {
IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
rate->val, iwl_rates[rate->val].plcp,
(rate->flags & IEEE80211_RATE_BASIC) ?
"*" : "");
priv->active_rate |= (1 << rate->val);
if (rate->flags & IEEE80211_RATE_BASIC)
priv->active_rate_basic |= (1 << rate->val);
} else
IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
rate->val, iwl_rates[rate->val].plcp);
}
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;
}
static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
{
unsigned long flags;
if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
return;
IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
disable_radio ? "OFF" : "ON");
if (disable_radio) {
iwl_scan_cancel(priv);
/* FIXME: This is a workaround for AP */
if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
spin_lock_irqsave(&priv->lock, flags);
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_SW_BIT_RFKILL);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
set_bit(STATUS_RF_KILL_SW, &priv->status);
}
return;
}
spin_lock_irqsave(&priv->lock, flags);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
clear_bit(STATUS_RF_KILL_SW, &priv->status);
spin_unlock_irqrestore(&priv->lock, flags);
/* wake up ucode */
msleep(10);
spin_lock_irqsave(&priv->lock, flags);
iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (!iwl_grab_restricted_access(priv))
iwl_release_restricted_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
IWL_DEBUG_RF_KILL("Can not turn radio back on - "
"disabled by HW switch\n");
return;
}
queue_work(priv->workqueue, &priv->restart);
return;
}
void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
u32 decrypt_res, struct ieee80211_rx_status *stats)
{
u16 fc =
le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
return;
if (!(fc & IEEE80211_FCTL_PROTECTED))
return;
IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
case RX_RES_STATUS_SEC_TYPE_TKIP:
if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
RX_RES_STATUS_BAD_ICV_MIC)
stats->flag |= RX_FLAG_MMIC_ERROR;
case RX_RES_STATUS_SEC_TYPE_WEP:
case RX_RES_STATUS_SEC_TYPE_CCMP:
if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
RX_RES_STATUS_DECRYPT_OK) {
IWL_DEBUG_RX("hw decrypt successfully!!!\n");
stats->flag |= RX_FLAG_DECRYPTED;
}
break;
default:
break;
}
}
void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb,
void *data, short len,
struct ieee80211_rx_status *stats,
u16 phy_flags)
{
struct iwl_rt_rx_hdr *iwl_rt;
/* First cache any information we need before we overwrite
* the information provided in the skb from the hardware */
s8 signal = stats->ssi;
s8 noise = 0;
int rate = stats->rate;
u64 tsf = stats->mactime;
__le16 phy_flags_hw = cpu_to_le16(phy_flags);
/* We received data from the HW, so stop the watchdog */
if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
return;
}
/* copy the frame data to write after where the radiotap header goes */
iwl_rt = (void *)rxb->skb->data;
memmove(iwl_rt->payload, data, len);
iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
/* total header + data */
iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
/* Set the size of the skb to the size of the frame */
skb_put(rxb->skb, sizeof(*iwl_rt) + len);
/* Big bitfield of all the fields we provide in radiotap */
iwl_rt->rt_hdr.it_present =
cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
(1 << IEEE80211_RADIOTAP_FLAGS) |
(1 << IEEE80211_RADIOTAP_RATE) |
(1 << IEEE80211_RADIOTAP_CHANNEL) |
(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
(1 << IEEE80211_RADIOTAP_ANTENNA));
/* Zero the flags, we'll add to them as we go */
iwl_rt->rt_flags = 0;
iwl_rt->rt_tsf = cpu_to_le64(tsf);
/* Convert to dBm */
iwl_rt->rt_dbmsignal = signal;
iwl_rt->rt_dbmnoise = noise;
/* Convert the channel frequency and set the flags */
iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
iwl_rt->rt_chbitmask =
cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
iwl_rt->rt_chbitmask =
cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
else /* 802.11g */
iwl_rt->rt_chbitmask =
cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
rate = iwl_rate_index_from_plcp(rate);
if (rate == -1)
iwl_rt->rt_rate = 0;
else
iwl_rt->rt_rate = iwl_rates[rate].ieee;
/* antenna number */
iwl_rt->rt_antenna =
le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
/* set the preamble flag if we have it */
if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
stats->flag |= RX_FLAG_RADIOTAP;
ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
rxb->skb = NULL;
}
#define IWL_PACKET_RETRY_TIME HZ
int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
{
u16 sc = le16_to_cpu(header->seq_ctrl);
u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
u16 frag = sc & IEEE80211_SCTL_FRAG;
u16 *last_seq, *last_frag;
unsigned long *last_time;
switch (priv->iw_mode) {
case IEEE80211_IF_TYPE_IBSS:{
struct list_head *p;
struct iwl_ibss_seq *entry = NULL;
u8 *mac = header->addr2;
int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
__list_for_each(p, &priv->ibss_mac_hash[index]) {
entry =
list_entry(p, struct iwl_ibss_seq, list);
if (!compare_ether_addr(entry->mac, mac))
break;
}
if (p == &priv->ibss_mac_hash[index]) {
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry) {
IWL_ERROR
("Cannot malloc new mac entry\n");
return 0;
}
memcpy(entry->mac, mac, ETH_ALEN);
entry->seq_num = seq;
entry->frag_num = frag;
entry->packet_time = jiffies;
list_add(&entry->list,
&priv->ibss_mac_hash[index]);
return 0;
}
last_seq = &entry->seq_num;
last_frag = &entry->frag_num;
last_time = &entry->packet_time;
break;
}
case IEEE80211_IF_TYPE_STA:
last_seq = &priv->last_seq_num;
last_frag = &priv->last_frag_num;
last_time = &priv->last_packet_time;
break;
default:
return 0;
}
if ((*last_seq == seq) &&
time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
if (*last_frag == frag)
goto drop;
if (*last_frag + 1 != frag)
/* out-of-order fragment */
goto drop;
} else
*last_seq = seq;
*last_frag = frag;
*last_time = jiffies;
return 0;
drop:
return 1;
}
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
#include "iwl-spectrum.h"
#define BEACON_TIME_MASK_LOW 0x00FFFFFF
#define BEACON_TIME_MASK_HIGH 0xFF000000
#define TIME_UNIT 1024
/*
* extended beacon time format
* time in usec will be changed into a 32-bit value in 8:24 format
* the high 1 byte is the beacon counts
* the lower 3 bytes is the time in usec within one beacon interval
*/
static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
{
u32 quot;
u32 rem;
u32 interval = beacon_interval * 1024;
if (!interval || !usec)
return 0;
quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
rem = (usec % interval) & BEACON_TIME_MASK_LOW;
return (quot << 24) + rem;
}
/* base is usually what we get from ucode with each received frame,
* the same as HW timer counter counting down
*/
static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
{
u32 base_low = base & BEACON_TIME_MASK_LOW;
u32 addon_low = addon & BEACON_TIME_MASK_LOW;
u32 interval = beacon_interval * TIME_UNIT;
u32 res = (base & BEACON_TIME_MASK_HIGH) +
(addon & BEACON_TIME_MASK_HIGH);
if (base_low > addon_low)
res += base_low - addon_low;
else if (base_low < addon_low) {
res += interval + base_low - addon_low;
res += (1 << 24);
} else
res += (1 << 24);
return cpu_to_le32(res);
}
static int iwl_get_measurement(struct iwl_priv *priv,
struct ieee80211_measurement_params *params,
u8 type)
{
struct iwl_spectrum_cmd spectrum;
struct iwl_rx_packet *res;
struct iwl_host_cmd cmd = {
.id = REPLY_SPECTRUM_MEASUREMENT_CMD,
.data = (void *)&spectrum,
.meta.flags = CMD_WANT_SKB,
};
u32 add_time = le64_to_cpu(params->start_time);
int rc;
int spectrum_resp_status;
int duration = le16_to_cpu(params->duration);
if (iwl_is_associated(priv))
add_time =
iwl_usecs_to_beacons(
le64_to_cpu(params->start_time) - priv->last_tsf,
le16_to_cpu(priv->rxon_timing.beacon_interval));
memset(&spectrum, 0, sizeof(spectrum));
spectrum.channel_count = cpu_to_le16(1);
spectrum.flags =
RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
cmd.len = sizeof(spectrum);
spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
if (iwl_is_associated(priv))
spectrum.start_time =
iwl_add_beacon_time(priv->last_beacon_time,
add_time,
le16_to_cpu(priv->rxon_timing.beacon_interval));
else
spectrum.start_time = 0;
spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
spectrum.channels[0].channel = params->channel;
spectrum.channels[0].type = type;
if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
spectrum.flags |= RXON_FLG_BAND_24G_MSK |
RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
rc = iwl_send_cmd_sync(priv, &cmd);
if (rc)
return rc;
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
rc = -EIO;
}
spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
switch (spectrum_resp_status) {
case 0: /* Command will be handled */
if (res->u.spectrum.id != 0xff) {
IWL_DEBUG_INFO
("Replaced existing measurement: %d\n",
res->u.spectrum.id);
priv->measurement_status &= ~MEASUREMENT_READY;
}
priv->measurement_status |= MEASUREMENT_ACTIVE;
rc = 0;
break;
case 1: /* Command will not be handled */
rc = -EAGAIN;
break;
}
dev_kfree_skb_any(cmd.meta.u.skb);
return rc;
}
#endif
static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
struct iwl_tx_info *tx_sta)
{
tx_sta->status.ack_signal = 0;
tx_sta->status.excessive_retries = 0;
tx_sta->status.queue_length = 0;
tx_sta->status.queue_number = 0;
if (in_interrupt())
ieee80211_tx_status_irqsafe(priv->hw,
tx_sta->skb[0], &(tx_sta->status));
else
ieee80211_tx_status(priv->hw,
tx_sta->skb[0], &(tx_sta->status));
tx_sta->skb[0] = NULL;
}
/**
* iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
*
* When FW advances 'R' index, all entries between old and
* new 'R' index need to be reclaimed. As result, some free space
* forms. If there is enough free space (> low mark), wake Tx queue.
*/
int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
{
struct iwl_tx_queue *txq = &priv->txq[txq_id];
struct iwl_queue *q = &txq->q;
int nfreed = 0;
if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
"is out of range [0-%d] %d %d.\n", txq_id,
index, q->n_bd, q->first_empty, q->last_used);
return 0;
}
for (index = iwl_queue_inc_wrap(index, q->n_bd);
q->last_used != index;
q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
if (txq_id != IWL_CMD_QUEUE_NUM) {
iwl_txstatus_to_ieee(priv,
&(txq->txb[txq->q.last_used]));
iwl_hw_txq_free_tfd(priv, txq);
} else if (nfreed > 1) {
IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
q->first_empty, q->last_used);
queue_work(priv->workqueue, &priv->restart);
}
nfreed++;
}
if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
(txq_id != IWL_CMD_QUEUE_NUM) &&
priv->mac80211_registered)
ieee80211_wake_queue(priv->hw, txq_id);
return nfreed;
}
static int iwl_is_tx_success(u32 status)
{
return (status & 0xFF) == 0x1;
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
static void iwl_rx_reply_tx(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
u16 sequence = le16_to_cpu(pkt->hdr.sequence);
int txq_id = SEQ_TO_QUEUE(sequence);
int index = SEQ_TO_INDEX(sequence);
struct iwl_tx_queue *txq = &priv->txq[txq_id];
struct ieee80211_tx_status *tx_status;
struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
u32 status = le32_to_cpu(tx_resp->status);
if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
"is out of range [0-%d] %d %d\n", txq_id,
index, txq->q.n_bd, txq->q.first_empty,
txq->q.last_used);
return;
}
tx_status = &(txq->txb[txq->q.last_used].status);
tx_status->retry_count = tx_resp->failure_frame;
tx_status->queue_number = status;
tx_status->queue_length = tx_resp->bt_kill_count;
tx_status->queue_length |= tx_resp->failure_rts;
tx_status->flags =
iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
txq_id, iwl_get_tx_fail_reason(status), status,
tx_resp->rate, tx_resp->failure_frame);
IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
if (index != -1)
iwl_tx_queue_reclaim(priv, txq_id, index);
if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
}
static void iwl_rx_reply_alive(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)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;
iwl_disable_events(priv);
}
/* 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_add_sta(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
return;
}
static void iwl_rx_reply_error(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)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 = (void *)rxb->skb->data;
struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
struct iwl_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_spectrum_measure_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
if (!report->state) {
IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
"Spectrum Measure Notification: Start\n");
return;
}
memcpy(&priv->measure_report, report, sizeof(*report));
priv->measurement_status |= MEASUREMENT_READY;
#endif
}
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 = (void *)rxb->skb->data;
struct iwl_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 = (void *)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(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->interface_id, NULL);
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);
}
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 = (void *)rxb->skb->data;
struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
u8 rate = beacon->beacon_notify_hdr.rate;
IWL_DEBUG_RX("beacon status %x retries %d iss %d "
"tsf %d %d rate %d\n",
le32_to_cpu(beacon->beacon_notify_hdr.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 == IEEE80211_IF_TYPE_AP) &&
(!test_bit(STATUS_EXIT_PENDING, &priv->status)))
queue_work(priv->workqueue, &priv->beacon_update);
}
/* Service response to REPLY_SCAN_CMD (0x80) */
static void iwl_rx_reply_scan(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl_scanreq_notification *notif =
(struct iwl_scanreq_notification *)pkt->u.raw;
IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
#endif
}
/* Service SCAN_START_NOTIFICATION (0x82) */
static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl_scanstart_notification *notif =
(struct iwl_scanstart_notification *)pkt->u.raw;
priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
IWL_DEBUG_SCAN("Scan start: "
"%d [802.11%s] "
"(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
notif->channel,
notif->band ? "bg" : "a",
notif->tsf_high,
notif->tsf_low, notif->status, notif->beacon_timer);
}
/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl_scanresults_notification *notif =
(struct iwl_scanresults_notification *)pkt->u.raw;
IWL_DEBUG_SCAN("Scan ch.res: "
"%d [802.11%s] "
"(TSF: 0x%08X:%08X) - %d "
"elapsed=%lu usec (%dms since last)\n",
notif->channel,
notif->band ? "bg" : "a",
le32_to_cpu(notif->tsf_high),
le32_to_cpu(notif->tsf_low),
le32_to_cpu(notif->statistics[0]),
le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
jiffies_to_msecs(elapsed_jiffies
(priv->last_scan_jiffies, jiffies)));
priv->last_scan_jiffies = jiffies;
}
/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
scan_notif->scanned_channels,
scan_notif->tsf_low,
scan_notif->tsf_high, scan_notif->status);
/* The HW is no longer scanning */
clear_bit(STATUS_SCAN_HW, &priv->status);
/* The scan completion notification came in, so kill that timer... */
cancel_delayed_work(&priv->scan_check);
IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
(priv->scan_bands == 2) ? "2.4" : "5.2",
jiffies_to_msecs(elapsed_jiffies
(priv->scan_pass_start, jiffies)));
/* Remove this scanned band from the list
* of pending bands to scan */
priv->scan_bands--;
/* If a request to abort was given, or the scan did not succeed
* then we reset the scan state machine and terminate,
* re-queuing another scan if one has been requested */
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_INFO("Aborted scan completed.\n");
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
} else {
/* If there are more bands on this scan pass reschedule */
if (priv->scan_bands > 0)
goto reschedule;
}
priv->last_scan_jiffies = jiffies;
IWL_DEBUG_INFO("Setting scan to off\n");
clear_bit(STATUS_SCANNING, &priv->status);
IWL_DEBUG_INFO("Scan took %dms\n",
jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
queue_work(priv->workqueue, &priv->scan_completed);
return;
reschedule:
priv->scan_pass_start = jiffies;
queue_work(priv->workqueue, &priv->request_scan);
}
/* 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 = (void *)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");
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
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);
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);
}
/**
* 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_ADD_STA] = iwl_rx_reply_add_sta;
priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
iwl_rx_spectrum_measure_notif;
priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
iwl_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
/* NOTE: iwl_rx_statistics is different based on whether
* the build is for the 3945 or the 4965. See the
* corresponding implementation in iwl-XXXX.c
*
* The same handler is used for both the REPLY to a
* discrete statistics request from the host as well as
* for the periodic statistics notification from the uCode
*/
priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
iwl_rx_scan_results_notif;
priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
iwl_rx_scan_complete_notif;
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
/* Setup hardware specific Rx handlers */
iwl_hw_rx_handler_setup(priv);
}
/**
* iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
* @rxb: Rx buffer to reclaim
*
* If an Rx buffer has an async callback associated with it the callback
* will be executed. The attached skb (if present) will only be freed
* if the callback returns 1
*/
static void iwl_tx_cmd_complete(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
u16 sequence = le16_to_cpu(pkt->hdr.sequence);
int txq_id = SEQ_TO_QUEUE(sequence);
int index = SEQ_TO_INDEX(sequence);
int huge = sequence & SEQ_HUGE_FRAME;
int cmd_index;
struct iwl_cmd *cmd;
/* If a Tx command is being handled and it isn't in the actual
* command queue then there a command routing bug has been introduced
* in the queue management code. */
if (txq_id != IWL_CMD_QUEUE_NUM)
IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
txq_id, pkt->hdr.cmd);
BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
/* Input error checking is done when commands are added to queue. */
if (cmd->meta.flags & CMD_WANT_SKB) {
cmd->meta.source->u.skb = rxb->skb;
rxb->skb = NULL;
} else if (cmd->meta.u.callback &&
!cmd->meta.u.callback(priv, cmd, rxb->skb))
rxb->skb = NULL;
iwl_tx_queue_reclaim(priv, txq_id, index);
if (!(cmd->meta.flags & CMD_ASYNC)) {
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
}
}
/************************** RX-FUNCTIONS ****************************/
/*
* Rx theory of operation
*
* The host allocates 32 DMA target addresses and passes the host address
* to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
* 0 to 31
*
* Rx Queue Indexes
* The host/firmware share two index registers for managing the Rx buffers.
*
* The READ index maps to the first position that the firmware may be writing
* to -- the driver can read up to (but not including) this position and get
* good data.
* The READ index is managed by the firmware once the card is enabled.
*
* The WRITE index maps to the last position the driver has read from -- the
* position preceding WRITE is the last slot the firmware can place a packet.
*
* The queue is empty (no good data) if WRITE = READ - 1, and is full if
* WRITE = READ.
*
* During initialization the host sets up the READ queue position to the first
* INDEX position, and WRITE to the last (READ - 1 wrapped)
*
* When the firmware places a packet in a buffer it will advance the READ index
* and fire the RX interrupt. The driver can then query the READ index and
* process as many packets as possible, moving the WRITE index forward as it
* resets the Rx queue buffers with new memory.
*
* The management in the driver is as follows:
* + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
* iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
* to replensish the iwl->rxq->rx_free.
* + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
* iwl->rxq is replenished and the READ INDEX is updated (updating the
* 'processed' and 'read' driver indexes as well)
* + A received packet is processed and handed to the kernel network stack,
* detached from the iwl->rxq. The driver 'processed' index is updated.
* + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
* list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
* INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
* were enough free buffers and RX_STALLED is set it is cleared.
*
*
* Driver sequence:
*
* iwl_rx_queue_alloc() Allocates rx_free
* iwl_rx_replenish() Replenishes rx_free list from rx_used, and calls
* iwl_rx_queue_restock
* iwl_rx_queue_restock() Moves available buffers from rx_free into Rx
* queue, updates firmware pointers, and updates
* the WRITE index. If insufficient rx_free buffers
* are available, schedules iwl_rx_replenish
*
* -- enable interrupts --
* ISR - iwl_rx() Detach iwl_rx_mem_buffers from pool up to the
* READ INDEX, detaching the SKB from the pool.
* Moves the packet buffer from queue to rx_used.
* Calls iwl_rx_queue_restock to refill any empty
* slots.
* ...
*
*/
/**
* iwl_rx_queue_space - Return number of free slots available in queue.
*/
static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
{
int s = q->read - q->write;
if (s <= 0)
s += RX_QUEUE_SIZE;
/* keep some buffer to not confuse full and empty queue */
s -= 2;
if (s < 0)
s = 0;
return s;
}
/**
* iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
*
* NOTE: This function has 3945 and 4965 specific code sections
* but is declared in base due to the majority of the
* implementation being the same (only a numeric constant is
* different)
*
*/
int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
{
u32 reg = 0;
int rc = 0;
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
if (q->need_update == 0)
goto exit_unlock;
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
goto exit_unlock;
}
rc = iwl_grab_restricted_access(priv);
if (rc)
goto exit_unlock;
iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
q->write & ~0x7);
iwl_release_restricted_access(priv);
} else
iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
q->need_update = 0;
exit_unlock:
spin_unlock_irqrestore(&q->lock, flags);
return rc;
}
/**
* iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
*
* NOTE: This function has 3945 and 4965 specific code paths in it.
*/
static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
dma_addr_t dma_addr)
{
return cpu_to_le32((u32)dma_addr);
}
/**
* iwl_rx_queue_restock - refill RX queue from pre-allocated pool
*
* If there are slots in the RX queue that need to be restocked,
* and we have free pre-allocated buffers, fill the ranks as much
* as we can pulling from rx_free.
*
* This moves the 'write' index forward to catch up with 'processed', and
* also updates the memory address in the firmware to reference the new
* target buffer.
*/
int iwl_rx_queue_restock(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl_rx_mem_buffer *rxb;
unsigned long flags;
int write, rc;
spin_lock_irqsave(&rxq->lock, flags);
write = rxq->write & ~0x7;
while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
element = rxq->rx_free.next;
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
list_del(element);
rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
rxq->queue[rxq->write] = rxb;
rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
rxq->free_count--;
}
spin_unlock_irqrestore(&rxq->lock, flags);
/* If the pre-allocated buffer pool is dropping low, schedule to
* refill it */
if (rxq->free_count <= RX_LOW_WATERMARK)
queue_work(priv->workqueue, &priv->rx_replenish);
/* If we've added more space for the firmware to place data, tell it */
if ((write != (rxq->write & ~0x7))
|| (abs(rxq->write - rxq->read) > 7)) {
spin_lock_irqsave(&rxq->lock, flags);
rxq->need_update = 1;
spin_unlock_irqrestore(&rxq->lock, flags);
rc = iwl_rx_queue_update_write_ptr(priv, rxq);
if (rc)
return rc;
}
return 0;
}
/**
* iwl_rx_replensih - Move all used packet from rx_used to rx_free
*
* When moving to rx_free an SKB is allocated for the slot.
*
* Also restock the Rx queue via iwl_rx_queue_restock.
* This is called as a scheduled work item (except for during intialization)
*/
void iwl_rx_replenish(void *data)
{
struct iwl_priv *priv = data;
struct iwl_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl_rx_mem_buffer *rxb;
unsigned long flags;
spin_lock_irqsave(&rxq->lock, flags);
while (!list_empty(&rxq->rx_used)) {
element = rxq->rx_used.next;
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
rxb->skb =
alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
if (!rxb->skb) {
if (net_ratelimit())
printk(KERN_CRIT DRV_NAME
": Can not allocate SKB buffers\n");
/* We don't reschedule replenish work here -- we will
* call the restock method and if it still needs
* more buffers it will schedule replenish */
break;
}
priv->alloc_rxb_skb++;
list_del(element);
rxb->dma_addr =
pci_map_single(priv->pci_dev, rxb->skb->data,
IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
}
spin_unlock_irqrestore(&rxq->lock, flags);
spin_lock_irqsave(&priv->lock, flags);
iwl_rx_queue_restock(priv);
spin_unlock_irqrestore(&priv->lock, flags);
}
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
* If an SKB has been detached, the POOL needs to have it's SKB set to NULL
* This free routine walks the list of POOL entries and if SKB is set to
* non NULL it is unmapped and freed
*/
void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
int i;
for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
if (rxq->pool[i].skb != NULL) {
pci_unmap_single(priv->pci_dev,
rxq->pool[i].dma_addr,
IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
dev_kfree_skb(rxq->pool[i].skb);
}
}
pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
rxq->dma_addr);
rxq->bd = NULL;
}
int iwl_rx_queue_alloc(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
struct pci_dev *dev = priv->pci_dev;
int i;
spin_lock_init(&rxq->lock);
INIT_LIST_HEAD(&rxq->rx_free);
INIT_LIST_HEAD(&rxq->rx_used);
rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
if (!rxq->bd)
return -ENOMEM;
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
/* Set us so that we have processed and used all buffers, but have
* not restocked the Rx queue with fresh buffers */
rxq->read = rxq->write = 0;
rxq->free_count = 0;
rxq->need_update = 0;
return 0;
}
void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
unsigned long flags;
int i;
spin_lock_irqsave(&rxq->lock, flags);
INIT_LIST_HEAD(&rxq->rx_free);
INIT_LIST_HEAD(&rxq->rx_used);
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
/* In the reset function, these buffers may have been allocated
* to an SKB, so we need to unmap and free potential storage */
if (rxq->pool[i].skb != NULL) {
pci_unmap_single(priv->pci_dev,
rxq->pool[i].dma_addr,
IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
priv->alloc_rxb_skb--;
dev_kfree_skb(rxq->pool[i].skb);
rxq->pool[i].skb = NULL;
}
list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
}
/* Set us so that we have processed and used all buffers, but have
* not restocked the Rx queue with fresh buffers */
rxq->read = rxq->write = 0;
rxq->free_count = 0;
spin_unlock_irqrestore(&rxq->lock, flags);
}
/* Convert linear signal-to-noise ratio into dB */
static u8 ratio2dB[100] = {
/* 0 1 2 3 4 5 6 7 8 9 */
0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
};
/* Calculates a relative dB value from a ratio of linear
* (i.e. not dB) signal levels.
* Conversion assumes that levels are voltages (20*log), not powers (10*log). */
int iwl_calc_db_from_ratio(int sig_ratio)
{
/* Anything above 1000:1 just report as 60 dB */
if (sig_ratio > 1000)
return 60;
/* Above 100:1, divide by 10 and use table,
* add 20 dB to make up for divide by 10 */
if (sig_ratio > 100)
return (20 + (int)ratio2dB[sig_ratio/10]);
/* We shouldn't see this */
if (sig_ratio < 1)
return 0;
/* Use table for ratios 1:1 - 99:1 */
return (int)ratio2dB[sig_ratio];
}
#define PERFECT_RSSI (-20) /* dBm */
#define WORST_RSSI (-95) /* dBm */
#define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
/* Calculate an indication of rx signal quality (a percentage, not dBm!).
* See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
* about formulas used below. */
int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
{
int sig_qual;
int degradation = PERFECT_RSSI - rssi_dbm;
/* If we get a noise measurement, use signal-to-noise ratio (SNR)
* as indicator; formula is (signal dbm - noise dbm).
* SNR at or above 40 is a great signal (100%).
* Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
* Weakest usable signal is usually 10 - 15 dB SNR. */
if (noise_dbm) {
if (rssi_dbm - noise_dbm >= 40)
return 100;
else if (rssi_dbm < noise_dbm)
return 0;
sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
/* Else use just the signal level.
* This formula is a least squares fit of data points collected and
* compared with a reference system that had a percentage (%) display
* for signal quality. */
} else
sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
(15 * RSSI_RANGE + 62 * degradation)) /
(RSSI_RANGE * RSSI_RANGE);
if (sig_qual > 100)
sig_qual = 100;
else if (sig_qual < 1)
sig_qual = 0;
return sig_qual;
}
/**
* iwl_rx_handle - Main entry function for receiving responses from the uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
* frame-received notifications, and other notifications.
*/
static void iwl_rx_handle(struct iwl_priv *priv)
{
struct iwl_rx_mem_buffer *rxb;
struct iwl_rx_packet *pkt;
struct iwl_rx_queue *rxq = &priv->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
r = iwl_hw_get_rx_read(priv);
i = rxq->read;
/* Rx interrupt, but nothing sent from uCode */
if (i == r)
IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
while (i != r) {
rxb = rxq->queue[i];
/* If an RXB doesn't have a queue slot associated with it
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
rxq->queue[i] = NULL;
pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
IWL_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 != 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_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
"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_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
"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->dma_addr,
IWL_RX_BUF_SIZE, 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;
}
/* Backtrack one entry */
priv->rxq.read = i;
iwl_rx_queue_restock(priv);
}
int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
struct iwl_tx_queue *txq)
{
u32 reg = 0;
int rc = 0;
int txq_id = txq->q.id;
if (txq->need_update == 0)
return rc;
/* if we're trying to save power */
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
/* wake up nic if it's powered down ...
* uCode will wake up, and interrupt us again, so next
* time we'll skip this part. */
reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
iwl_set_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
return rc;
}
/* restore this queue's parameters in nic hardware. */
rc = iwl_grab_restricted_access(priv);
if (rc)
return rc;
iwl_write_restricted(priv, HBUS_TARG_WRPTR,
txq->q.first_empty | (txq_id << 8));
iwl_release_restricted_access(priv);
/* else not in power-save mode, uCode will never sleep when we're
* trying to tx (during RFKILL, we're not trying to tx). */
} else
iwl_write32(priv, HBUS_TARG_WRPTR,
txq->q.first_empty | (txq_id << 8));
txq->need_update = 0;
return rc;
}
#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
{
DECLARE_MAC_BUF(mac);
IWL_DEBUG_RADIO("RX CONFIG:\n");
iwl_print_hex_dump(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: %s\n",
print_mac(mac, rxon->node_addr));
IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
print_mac(mac, 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);
}
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");
}
static const char *desc_lookup(int i)
{
switch (i) {
case 1:
return "FAIL";
case 2:
return "BAD_PARAM";
case 3:
return "BAD_CHECKSUM";
case 4:
return "NMI_INTERRUPT";
case 5:
return "SYSASSERT";
case 6:
return "FATAL_ERROR";
}
return "UNKNOWN";
}
#define ERROR_START_OFFSET (1 * sizeof(u32))
#define ERROR_ELEM_SIZE (7 * sizeof(u32))
static void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
u32 i;
u32 desc, time, count, base, data1;
u32 blink1, blink2, ilink1, ilink2;
int rc;
base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
if (!iwl_hw_valid_rtc_data_addr(base)) {
IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
return;
}
rc = iwl_grab_restricted_access(priv);
if (rc) {
IWL_WARNING("Can not read from adapter at this time.\n");
return;
}
count = iwl_read_restricted_mem(priv, base);
if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
IWL_ERROR("Start IWL Error Log Dump:\n");
IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
priv->status, priv->config, count);
}
IWL_ERROR("Desc Time asrtPC blink2 "
"ilink1 nmiPC Line\n");
for (i = ERROR_START_OFFSET;
i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
i += ERROR_ELEM_SIZE) {
desc = iwl_read_restricted_mem(priv, base + i);
time =
iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
blink1 =
iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
blink2 =
iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
ilink1 =
iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
ilink2 =
iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
data1 =
iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
IWL_ERROR
("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
desc_lookup(desc), desc, time, blink1, blink2,
ilink1, ilink2, data1);
}
iwl_release_restricted_access(priv);
}
#define EVENT_START_OFFSET (4 * sizeof(u32))
/**
* iwl_print_event_log - Dump error event log to syslog
*
* NOTE: Must be called with iwl_grab_restricted_access() already obtained!
*/
static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
u32 num_events, u32 mode)
{
u32 i;
u32 base; /* SRAM byte address of event log header */
u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
if (num_events == 0)
return;
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (mode == 0)
event_size = 2 * sizeof(u32);
else
event_size = 3 * sizeof(u32);
ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
/* "time" is actually "data" for mode 0 (no timestamp).
* place event id # at far right for easier visual parsing. */
for (i = 0; i < num_events; i++) {
ev = iwl_read_restricted_mem(priv, ptr);
ptr += sizeof(u32);
time = iwl_read_restricted_mem(priv, ptr);
ptr += sizeof(u32);
if (mode == 0)
IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
else {
data = iwl_read_restricted_mem(priv, ptr);
ptr += sizeof(u32);
IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
}
}
}
static void iwl_dump_nic_event_log(struct iwl_priv *priv)
{
int rc;
u32 base; /* SRAM byte address of event log header */
u32 capacity; /* event log capacity in # entries */
u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
u32 num_wraps; /* # times uCode wrapped to top of log */
u32 next_entry; /* index of next entry to be written by uCode */
u32 size; /* # entries that we'll print */
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (!iwl_hw_valid_rtc_data_addr(base)) {
IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
return;
}
rc = iwl_grab_restricted_access(priv);
if (rc) {
IWL_WARNING("Can not read from adapter at this time.\n");
return;
}
/* event log header */
capacity = iwl_read_restricted_mem(priv, base);
mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
size = num_wraps ? capacity : next_entry;
/* bail out if nothing in log */
if (size == 0) {
IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
iwl_release_restricted_access(priv);
return;
}
IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
size, num_wraps);
/* if uCode has wrapped back to top of log, start at the oldest entry,
* i.e the next one that uCode would fill. */
if (num_wraps)
iwl_print_event_log(priv, next_entry,
capacity - next_entry, mode);
/* (then/else) start at top of log */
iwl_print_event_log(priv, 0, next_entry, mode);
iwl_release_restricted_access(priv);
}
/**
* 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 (iwl_debug_level & IWL_DL_FW_ERRORS) {
iwl_dump_nic_error_log(priv);
iwl_dump_nic_event_log(priv);
iwl_print_rx_config_cmd(&priv->staging_rxon);
}
#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_INFO | 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;
}
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_add_station(priv, priv->bssid, 1, 0);
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 (iwl_debug_level & IWL_DL_ISR) {
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
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 & CSR_FH_INT_RX_MASK)
inta |= CSR_INT_BIT_FH_RX;
if (inta_fh & CSR_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 (iwl_debug_level & (IWL_DL_ISR)) {
/* NIC fires this, but we don't use it, redundant with WAKEUP */
if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
IWL_DEBUG_ISR("Microcode started or stopped.\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_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
/* HW RF KILL switch toggled (4965 only) */
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_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
"RF_KILL bit toggled to %s.\n",
hw_rf_kill ? "disable radio":"enable radio");
/* Queue restart only if RF_KILL switch was set to "kill"
* when we loaded driver, and is now set to "enable".
* After we're Alive, RF_KILL gets handled by
* iwl_rx_card_state_notif() */
if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
queue_work(priv->workqueue, &priv->restart);
handled |= CSR_INT_BIT_RF_KILL;
}
/* Chip got too hot and stopped itself (4965 only) */
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_tx_queue_update_write_ptr(priv, &priv->txq[0]);
iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
iwl_tx_queue_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");
iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
if (!iwl_grab_restricted_access(priv)) {
iwl_write_restricted(priv,
FH_TCSR_CREDIT
(ALM_FH_SRVC_CHNL), 0x0);
iwl_release_restricted_access(priv);
}
handled |= CSR_INT_BIT_FH_TX;
}
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 */
iwl_enable_interrupts(priv);
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_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 */
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);
/* iwl_irq_tasklet() will service interrupts and re-enable them */
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. */
iwl_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
/************************** EEPROM BANDS ****************************
*
* The iwl_eeprom_band definitions below provide the mapping from the
* EEPROM contents to the specific channel number supported for each
* band.
*
* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
* definition below maps to physical channel 42 in the 5.2GHz spectrum.
* The specific geography and calibration information for that channel
* is contained in the eeprom map itself.
*
* During init, we copy the eeprom information and channel map
* information into priv->channel_info_24/52 and priv->channel_map_24/52
*
* channel_map_24/52 provides the index in the channel_info array for a
* given channel. We have to have two separate maps as there is channel
* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
* band_2
*
* A value of 0xff stored in the channel_map indicates that the channel
* is not supported by the hardware at all.
*
* A value of 0xfe in the channel_map indicates that the channel is not
* valid for Tx with the current hardware. This means that
* while the system can tune and receive on a given channel, it may not
* be able to associate or transmit any frames on that
* channel. There is no corresponding channel information for that
* entry.
*
*********************************************************************/
/* 2.4 GHz */
static const u8 iwl_eeprom_band_1[14] = {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};
/* 5.2 GHz bands */
static const u8 iwl_eeprom_band_2[] = {
183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};
static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};
static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};
static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
145, 149, 153, 157, 161, 165
};
static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
int *eeprom_ch_count,
const struct iwl_eeprom_channel
**eeprom_ch_info,
const u8 **eeprom_ch_index)
{
switch (band) {
case 1: /* 2.4GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
*eeprom_ch_info = priv->eeprom.band_1_channels;
*eeprom_ch_index = iwl_eeprom_band_1;
break;
case 2: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
*eeprom_ch_info = priv->eeprom.band_2_channels;
*eeprom_ch_index = iwl_eeprom_band_2;
break;
case 3: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
*eeprom_ch_info = priv->eeprom.band_3_channels;
*eeprom_ch_index = iwl_eeprom_band_3;
break;
case 4: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
*eeprom_ch_info = priv->eeprom.band_4_channels;
*eeprom_ch_index = iwl_eeprom_band_4;
break;
case 5: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
*eeprom_ch_info = priv->eeprom.band_5_channels;
*eeprom_ch_index = iwl_eeprom_band_5;
break;
default:
BUG();
return;
}
}
const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
int phymode, u16 channel)
{
int i;
switch (phymode) {
case MODE_IEEE80211A:
for (i = 14; i < priv->channel_count; i++) {
if (priv->channel_info[i].channel == channel)
return &priv->channel_info[i];
}
break;
case MODE_IEEE80211B:
case MODE_IEEE80211G:
if (channel >= 1 && channel <= 14)
return &priv->channel_info[channel - 1];
break;
}
return NULL;
}
#define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
? # x " " : "")
static int iwl_init_channel_map(struct iwl_priv *priv)
{
int eeprom_ch_count = 0;
const u8 *eeprom_ch_index = NULL;
const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
int band, ch;
struct iwl_channel_info *ch_info;
if (priv->channel_count) {
IWL_DEBUG_INFO("Channel map already initialized.\n");
return 0;
}
if (priv->eeprom.version < 0x2f) {
IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
priv->eeprom.version);
return -EINVAL;
}
IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
priv->channel_count =
ARRAY_SIZE(iwl_eeprom_band_1) +
ARRAY_SIZE(iwl_eeprom_band_2) +
ARRAY_SIZE(iwl_eeprom_band_3) +
ARRAY_SIZE(iwl_eeprom_band_4) +
ARRAY_SIZE(iwl_eeprom_band_5);
IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
priv->channel_count, GFP_KERNEL);
if (!priv->channel_info) {
IWL_ERROR("Could not allocate channel_info\n");
priv->channel_count = 0;
return -ENOMEM;
}
ch_info = priv->channel_info;
/* Loop through the 5 EEPROM bands adding them in order to the
* channel map we maintain (that contains additional information than
* what just in the EEPROM) */
for (band = 1; band <= 5; band++) {
iwl_init_band_reference(priv, band, &eeprom_ch_count,
&eeprom_ch_info, &eeprom_ch_index);
/* Loop through each band adding each of the channels */
for (ch = 0; ch < eeprom_ch_count; ch++) {
ch_info->channel = eeprom_ch_index[ch];
ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
MODE_IEEE80211A;
/* permanently store EEPROM's channel regulatory flags
* and max power in channel info database. */
ch_info->eeprom = eeprom_ch_info[ch];
/* Copy the run-time flags so they are there even on
* invalid channels */
ch_info->flags = eeprom_ch_info[ch].flags;
if (!(is_channel_valid(ch_info))) {
IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
"No traffic\n",
ch_info->channel,
ch_info->flags,
is_channel_a_band(ch_info) ?
"5.2" : "2.4");
ch_info++;
continue;
}
/* Initialize regulatory-based run-time data */
ch_info->max_power_avg = ch_info->curr_txpow =
eeprom_ch_info[ch].max_power_avg;
ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
ch_info->min_power = 0;
IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
" %ddBm): Ad-Hoc %ssupported\n",
ch_info->channel,
is_channel_a_band(ch_info) ?
"5.2" : "2.4",
CHECK_AND_PRINT(IBSS),
CHECK_AND_PRINT(ACTIVE),
CHECK_AND_PRINT(RADAR),
CHECK_AND_PRINT(WIDE),
CHECK_AND_PRINT(NARROW),
CHECK_AND_PRINT(DFS),
eeprom_ch_info[ch].flags,
eeprom_ch_info[ch].max_power_avg,
((eeprom_ch_info[ch].
flags & EEPROM_CHANNEL_IBSS)
&& !(eeprom_ch_info[ch].
flags & EEPROM_CHANNEL_RADAR))
? "" : "not ");
/* Set the user_txpower_limit to the highest power
* supported by any channel */
if (eeprom_ch_info[ch].max_power_avg >
priv->user_txpower_limit)
priv->user_txpower_limit =
eeprom_ch_info[ch].max_power_avg;
ch_info++;
}
}
if (iwl3945_txpower_set_from_eeprom(priv))
return -EIO;
return 0;
}
/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
* sending probe req. This should be set long enough to hear probe responses
* from more than one AP. */
#define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
#define IWL_ACTIVE_DWELL_TIME_52 (10)
/* For faster active scanning, scan will move to the next channel if fewer than
* PLCP_QUIET_THRESH packets are heard on this channel within
* ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
* time if it's a quiet channel (nothing responded to our probe, and there's
* no other traffic).
* Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
* Must be set longer than active dwell time.
* For the most reliable scan, set > AP beacon interval (typically 100msec). */
#define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
#define IWL_PASSIVE_DWELL_TIME_52 (10)
#define IWL_PASSIVE_DWELL_BASE (100)
#define IWL_CHANNEL_TUNE_TIME 5
static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
{
if (phymode == MODE_IEEE80211A)
return IWL_ACTIVE_DWELL_TIME_52;
else
return IWL_ACTIVE_DWELL_TIME_24;
}
static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
{
u16 active = iwl_get_active_dwell_time(priv, phymode);
u16 passive = (phymode != MODE_IEEE80211A) ?
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
if (iwl_is_associated(priv)) {
/* If we're associated, we clamp the maximum passive
* dwell time to be 98% of the beacon interval (minus
* 2 * channel tune time) */
passive = priv->beacon_int;
if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
passive = IWL_PASSIVE_DWELL_BASE;
passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
}
if (passive <= active)
passive = active + 1;
return passive;
}
static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
u8 is_active, u8 direct_mask,
struct iwl_scan_channel *scan_ch)
{
const struct ieee80211_channel *channels = NULL;
const struct ieee80211_hw_mode *hw_mode;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
hw_mode = iwl_get_hw_mode(priv, phymode);
if (!hw_mode)
return 0;
channels = hw_mode->channels;
active_dwell = iwl_get_active_dwell_time(priv, phymode);
passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
if (channels[i].chan ==
le16_to_cpu(priv->active_rxon.channel)) {
if (iwl_is_associated(priv)) {
IWL_DEBUG_SCAN
("Skipping current channel %d\n",
le16_to_cpu(priv->active_rxon.channel));
continue;
}
} else if (priv->only_active_channel)
continue;
scan_ch->channel = channels[i].chan;
ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
scan_ch->channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
!(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
scan_ch->type = 0; /* passive */
else
scan_ch->type = 1; /* active */
if (scan_ch->type & 1)
scan_ch->type |= (direct_mask << 1);
if (is_channel_narrow(ch_info))
scan_ch->type |= (1 << 7);
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set power levels to defaults */
scan_ch->tpc.dsp_atten = 110;
/* scan_pwr_info->tpc.dsp_atten; */
/*scan_pwr_info->tpc.tx_gain; */
if (phymode == MODE_IEEE80211A)
scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
else {
scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level
scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
*/
}
IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
scan_ch->channel,
(scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
(scan_ch->type & 1) ?
active_dwell : passive_dwell);
scan_ch++;
added++;
}
IWL_DEBUG_SCAN("total channels to scan %d \n", added);
return added;
}
static void iwl_reset_channel_flag(struct iwl_priv *priv)
{
int i, j;
for (i = 0; i < 3; i++) {
struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
for (j = 0; j < hw_mode->num_channels; j++)
hw_mode->channels[j].flag = hw_mode->channels[j].val;
}
}
static void iwl_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT; i++) {
rates[i].rate = iwl_rates[i].ieee * 5;
rates[i].val = i; /* Rate scaling will work on indexes */
rates[i].val2 = i;
rates[i].flags = IEEE80211_RATE_SUPPORTED;
/* Only OFDM have the bits-per-symbol set */
if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
rates[i].flags |= IEEE80211_RATE_OFDM;
else {
/*
* If CCK 1M then set rate flag to CCK else CCK_2
* which is CCK | PREAMBLE2
*/
rates[i].flags |= (iwl_rates[i].plcp == 10) ?
IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
}
/* Set up which ones are basic rates... */
if (IWL_BASIC_RATES_MASK & (1 << i))
rates[i].flags |= IEEE80211_RATE_BASIC;
}
}
/**
* iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
*/
static int iwl_init_geos(struct iwl_priv *priv)
{
struct iwl_channel_info *ch;
struct ieee80211_hw_mode *modes;
struct ieee80211_channel *channels;
struct ieee80211_channel *geo_ch;
struct ieee80211_rate *rates;
int i = 0;
enum {
A = 0,
B = 1,
G = 2,
};
int mode_count = 3;
if (priv->modes) {
IWL_DEBUG_INFO("Geography modes already initialized.\n");
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
GFP_KERNEL);
if (!modes)
return -ENOMEM;
channels = kzalloc(sizeof(struct ieee80211_channel) *
priv->channel_count, GFP_KERNEL);
if (!channels) {
kfree(modes);
return -ENOMEM;
}
rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
GFP_KERNEL);
if (!rates) {
kfree(modes);
kfree(channels);
return -ENOMEM;
}
/* 0 = 802.11a
* 1 = 802.11b
* 2 = 802.11g
*/
/* 5.2GHz channels start after the 2.4GHz channels */
modes[A].mode = MODE_IEEE80211A;
modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
modes[A].rates = &rates[4];
modes[A].num_rates = 8; /* just OFDM */
modes[A].num_channels = 0;
modes[B].mode = MODE_IEEE80211B;
modes[B].channels = channels;
modes[B].rates = rates;
modes[B].num_rates = 4; /* just CCK */
modes[B].num_channels = 0;
modes[G].mode = MODE_IEEE80211G;
modes[G].channels = channels;
modes[G].rates = rates;
modes[G].num_rates = 12; /* OFDM & CCK */
modes[G].num_channels = 0;
priv->ieee_channels = channels;
priv->ieee_rates = rates;
iwl_init_hw_rates(priv, rates);
for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
ch = &priv->channel_info[i];
if (!is_channel_valid(ch)) {
IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
"skipping.\n",
ch->channel, is_channel_a_band(ch) ?
"5.2" : "2.4");
continue;
}
if (is_channel_a_band(ch))
geo_ch = &modes[A].channels[modes[A].num_channels++];
else {
geo_ch = &modes[B].channels[modes[B].num_channels++];
modes[G].num_channels++;
}
geo_ch->freq = ieee80211chan2mhz(ch->channel);
geo_ch->chan = ch->channel;
geo_ch->power_level = ch->max_power_avg;
geo_ch->antenna_max = 0xff;
if (is_channel_valid(ch)) {
geo_ch->flag = IEEE80211_CHAN_W_SCAN;
if (ch->flags & EEPROM_CHANNEL_IBSS)
geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
if (ch->flags & EEPROM_CHANNEL_ACTIVE)
geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
if (ch->flags & EEPROM_CHANNEL_RADAR)
geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
if (ch->max_power_avg > priv->max_channel_txpower_limit)
priv->max_channel_txpower_limit =
ch->max_power_avg;
}
geo_ch->val = geo_ch->flag;
}
if ((modes[A].num_channels == 0) && priv->is_abg) {
printk(KERN_INFO DRV_NAME
": Incorrectly detected BG card as ABG. Please send "
"your PCI ID 0x%04X:0x%04X to maintainer.\n",
priv->pci_dev->device, priv->pci_dev->subsystem_device);
priv->is_abg = 0;
}
printk(KERN_INFO DRV_NAME
": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
modes[G].num_channels, modes[A].num_channels);
/*
* NOTE: We register these in preference of order -- the
* stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
* a phymode based on rates or AP capabilities but seems to
* configure it purely on if the channel being configured
* is supported by a mode -- and the first match is taken
*/
if (modes[G].num_channels)
ieee80211_register_hwmode(priv->hw, &modes[G]);
if (modes[B].num_channels)
ieee80211_register_hwmode(priv->hw, &modes[B]);
if (modes[A].num_channels)
ieee80211_register_hwmode(priv->hw, &modes[A]);
priv->modes = modes;
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
{
if (priv->ucode_code.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_code.len,
priv->ucode_code.v_addr,
priv->ucode_code.p_addr);
priv->ucode_code.v_addr = NULL;
}
if (priv->ucode_data.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_data.len,
priv->ucode_data.v_addr,
priv->ucode_data.p_addr);
priv->ucode_data.v_addr = NULL;
}
if (priv->ucode_data_backup.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_data_backup.len,
priv->ucode_data_backup.v_addr,
priv->ucode_data_backup.p_addr);
priv->ucode_data_backup.v_addr = NULL;
}
if (priv->ucode_init.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_init.len,
priv->ucode_init.v_addr,
priv->ucode_init.p_addr);
priv->ucode_init.v_addr = NULL;
}
if (priv->ucode_init_data.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_init_data.len,
priv->ucode_init_data.v_addr,
priv->ucode_init_data.p_addr);
priv->ucode_init_data.v_addr = NULL;
}
if (priv->ucode_boot.v_addr != NULL) {
pci_free_consistent(priv->pci_dev,
priv->ucode_boot.len,
priv->ucode_boot.v_addr,
priv->ucode_boot.p_addr);
priv->ucode_boot.v_addr = NULL;
}
}
/**
* iwl_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
{
u32 val;
u32 save_len = len;
int rc = 0;
u32 errcnt;
IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
rc = iwl_grab_restricted_access(priv);
if (rc)
return rc;
iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
errcnt = 0;
for (; len > 0; len -= sizeof(u32), image++) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IWL_DL_IO is set */
val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
IWL_ERROR("uCode INST section is invalid at "
"offset 0x%x, is 0x%x, s/b 0x%x\n",
save_len - len, val, le32_to_cpu(*image));
rc = -EIO;
errcnt++;
if (errcnt >= 20)
break;
}
}
iwl_release_restricted_access(priv);
if (!errcnt)
IWL_DEBUG_INFO
("ucode image in INSTRUCTION memory is good\n");
return rc;
}
/**
* iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
* using sample data 100 bytes apart. If these sample points are good,
* it's a pretty good bet that everything between them is good, too.
*/
static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
u32 val;
int rc = 0;
u32 errcnt = 0;
u32 i;
IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
rc = iwl_grab_restricted_access(priv);
if (rc)
return rc;
for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IWL_DL_IO is set */
iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
i + RTC_INST_LOWER_BOUND);
val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
#if 0 /* Enable this if you want to see details */
IWL_ERROR("uCode INST section is invalid at "
"offset 0x%x, is 0x%x, s/b 0x%x\n",
i, val, *image);
#endif
rc = -EIO;
errcnt++;
if (errcnt >= 3)
break;
}
}
iwl_release_restricted_access(priv);
return rc;
}
/**
* iwl_verify_ucode - determine which instruction image is in SRAM,
* and verify its contents
*/
static int iwl_verify_ucode(struct iwl_priv *priv)
{
__le32 *image;
u32 len;
int rc = 0;
/* Try bootstrap */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
rc = iwl_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
return 0;
}
/* Try initialize */
image = (__le32 *)priv->ucode_init.v_addr;
len = priv->ucode_init.len;
rc = iwl_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
return 0;
}
/* Try runtime/protocol */
image = (__le32 *)priv->ucode_code.v_addr;
len = priv->ucode_code.len;
rc = iwl_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
return 0;
}
IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
/* Show first several data entries in instruction SRAM.
* Selection of bootstrap image is arbitrary. */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
rc = iwl_verify_inst_full(priv, image, len);
return rc;
}
/* check contents of special bootstrap uCode SRAM */
static int iwl_verify_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
u32 reg;
u32 val;
IWL_DEBUG_INFO("Begin verify bsm\n");
/* verify BSM SRAM contents */
val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
for (reg = BSM_SRAM_LOWER_BOUND;
reg < BSM_SRAM_LOWER_BOUND + len;
reg += sizeof(u32), image ++) {
val = iwl_read_restricted_reg(priv, reg);
if (val != le32_to_cpu(*image)) {
IWL_ERROR("BSM uCode verification failed at "
"addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
BSM_SRAM_LOWER_BOUND,
reg - BSM_SRAM_LOWER_BOUND, len,
val, le32_to_cpu(*image));
return -EIO;
}
}
IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
return 0;
}
/**
* iwl_load_bsm - Load bootstrap instructions
*
* BSM operation:
*
* The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
* in special SRAM that does not power down during RFKILL. When powering back
* up after power-saving sleeps (or during initial uCode load), the BSM loads
* the bootstrap program into the on-board processor, and starts it.
*
* The bootstrap program loads (via DMA) instructions and data for a new
* program from host DRAM locations indicated by the host driver in the
* BSM_DRAM_* registers. Once the new program is loaded, it starts
* automatically.
*
* When initializing the NIC, the host driver points the BSM to the
* "initialize" uCode image. This uCode sets up some internal data, then
* notifies host via "initialize alive" that it is complete.
*
* The host then replaces the BSM_DRAM_* pointer values to point to the
* normal runtime uCode instructions and a backup uCode data cache buffer
* (filled initially with starting data values for the on-board processor),
* then triggers the "initialize" uCode to load and launch the runtime uCode,
* which begins normal operation.
*
* When doing a power-save shutdown, runtime uCode saves data SRAM into
* the backup data cache in DRAM before SRAM is powered down.
*
* When powering back up, the BSM loads the bootstrap program. This reloads
* the runtime uCode instructions and the backup data cache into SRAM,
* and re-launches the runtime uCode from where it left off.
*/
static int iwl_load_bsm(struct iwl_priv *priv)
{
__le32 *image = priv->ucode_boot.v_addr;
u32 len = priv->ucode_boot.len;
dma_addr_t pinst;
dma_addr_t pdata;
u32 inst_len;
u32 data_len;
int rc;
int i;
u32 done;
u32 reg_offset;
IWL_DEBUG_INFO("Begin load bsm\n");
/* make sure bootstrap program is no larger than BSM's SRAM size */
if (len > IWL_MAX_BSM_SIZE)
return -EINVAL;
/* Tell bootstrap uCode where to find the "Initialize" uCode
* in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
* NOTE: iwl_initialize_alive_start() will replace these values,
* after the "initialize" uCode has run, to point to
* runtime/protocol instructions and backup data cache. */
pinst = priv->ucode_init.p_addr;
pdata = priv->ucode_init_data.p_addr;
inst_len = priv->ucode_init.len;
data_len = priv->ucode_init_data.len;
rc = iwl_grab_restricted_access(priv);
if (rc)
return rc;
iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
/* Fill BSM memory with bootstrap instructions */
for (reg_offset = BSM_SRAM_LOWER_BOUND;
reg_offset < BSM_SRAM_LOWER_BOUND + len;
reg_offset += sizeof(u32), image++)
_iwl_write_restricted_reg(priv, reg_offset,
le32_to_cpu(*image));
rc = iwl_verify_bsm(priv);
if (rc) {
iwl_release_restricted_access(priv);
return rc;
}
/* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
RTC_INST_LOWER_BOUND);
iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
/* Load bootstrap code into instruction SRAM now,
* to prepare to load "initialize" uCode */
iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START);
/* Wait for load of bootstrap uCode to finish */
for (i = 0; i < 100; i++) {
done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
if (!(done & BSM_WR_CTRL_REG_BIT_START))
break;
udelay(10);
}
if (i < 100)
IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
else {
IWL_ERROR("BSM write did not complete!\n");
return -EIO;
}
/* Enable future boot loads whenever power management unit triggers it
* (e.g. when powering back up after power-save shutdown) */
iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
BSM_WR_CTRL_REG_BIT_START_EN);
iwl_release_restricted_access(priv);
return 0;
}
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 rc = 0;
const struct firmware *ucode_raw;
/* firmware file name contains uCode/driver compatibility version */
const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
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. */
rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
if (rc < 0) {
IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
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");
rc = -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);
rc = -EINVAL;
goto err_release;
}
/* Verify that uCode images will fit in card's SRAM */
if (inst_size > IWL_MAX_INST_SIZE) {
IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
(int)inst_size);
rc = -EINVAL;
goto err_release;
}
if (data_size > IWL_MAX_DATA_SIZE) {
IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
(int)data_size);
rc = -EINVAL;
goto err_release;
}
if (init_size > IWL_MAX_INST_SIZE) {
IWL_DEBUG_INFO
("uCode init instr len %d too large to fit in card\n",
(int)init_size);
rc = -EINVAL;
goto err_release;
}
if (init_data_size > IWL_MAX_DATA_SIZE) {
IWL_DEBUG_INFO
("uCode init data len %d too large to fit in card\n",
(int)init_data_size);
rc = -EINVAL;
goto err_release;
}
if (boot_size > IWL_MAX_BSM_SIZE) {
IWL_DEBUG_INFO
("uCode boot instr len %d too large to fit in bsm\n",
(int)boot_size);
rc = -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;
priv->ucode_code.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_code.len,
&(priv->ucode_code.p_addr));
priv->ucode_data.len = data_size;
priv->ucode_data.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_data.len,
&(priv->ucode_data.p_addr));
priv->ucode_data_backup.len = data_size;
priv->ucode_data_backup.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_data_backup.len,
&(priv->ucode_data_backup.p_addr));
/* Initialization instructions and data */
priv->ucode_init.len = init_size;
priv->ucode_init.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_init.len,
&(priv->ucode_init.p_addr));
priv->ucode_init_data.len = init_data_size;
priv->ucode_init_data.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_init_data.len,
&(priv->ucode_init_data.p_addr));
/* Bootstrap (instructions only, no data) */
priv->ucode_boot.len = boot_size;
priv->ucode_boot.v_addr =
pci_alloc_consistent(priv->pci_dev,
priv->ucode_boot.len,
&(priv->ucode_boot.p_addr));
if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
!priv->ucode_boot.v_addr || !priv->ucode_data_backup.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 %d\n",
(int)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 %d\n",
(int)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 %d\n",
(int)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 %d\n",
(int)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 %d\n",
(int)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");
rc = -ENOMEM;
iwl_dealloc_ucode_pci(priv);
err_release:
release_firmware(ucode_raw);
error:
return rc;
}
/**
* iwl_set_ucode_ptrs - Set uCode address location
*
* Tell initialization uCode where to find runtime uCode.
*
* BSM registers initially contain pointers to initialization uCode.
* We need to replace them to load runtime uCode inst and data,
* and to save runtime data when powering down.
*/
static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
{
dma_addr_t pinst;
dma_addr_t pdata;
int rc = 0;
unsigned long flags;
/* bits 31:0 for 3945 */
pinst = priv->ucode_code.p_addr;
pdata = priv->ucode_data_backup.p_addr;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl_grab_restricted_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* Tell bootstrap uCode where to find image to load */
iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
priv->ucode_data.len);
/* Inst bytecount must be last to set up, bit 31 signals uCode
* that all new ptr/size info is in place */
iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
priv->ucode_code.len | BSM_DRAM_INST_LOAD);
iwl_release_restricted_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
return rc;
}
/**
* iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
*
* Called after REPLY_ALIVE notification received from "initialize" uCode.
*
* The 4965 "initialize" ALIVE reply contains calibration data for:
* Voltage, temperature, and MIMO tx gain correction, now stored in priv
* (3945 does not contain this data).
*
* Tell "initialize" uCode to go ahead and load the runtime uCode.
*/
static void iwl_init_alive_start(struct iwl_priv *priv)
{
/* Check alive response for "valid" sign from uCode */
if (priv->card_alive_init.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("Initialize Alive failed.\n");
goto restart;
}
/* Bootstrap uCode has loaded initialize uCode ... verify inst image.
* This is a paranoid check, because we would not have gotten the
* "initialize" 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 \"initialize\" uCode load.\n");
goto restart;
}
/* Send pointers to protocol/runtime uCode image ... init code will
* load and launch runtime uCode, which will send us another "Alive"
* notification. */
IWL_DEBUG_INFO("Initialization Alive received.\n");
if (iwl_set_ucode_ptrs(priv)) {
/* Runtime instruction load won't happen;
* take it all the way back down so we can try again */
IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
goto restart;
}
return;
restart:
queue_work(priv->workqueue, &priv->restart);
}
/**
* 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 rc = 0;
int thermal_spin = 0;
u32 rfkill;
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);
rc = iwl_grab_restricted_access(priv);
if (rc) {
IWL_WARNING("Can not read rfkill status from adapter\n");
return;
}
rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
iwl_release_restricted_access(priv);
if (rfkill & 0x1) {
clear_bit(STATUS_RF_KILL_HW, &priv->status);
/* if rfkill is not on, then wait for thermal
* sensor in adapter to kick in */
while (iwl_hw_get_temperature(priv) == 0) {
thermal_spin++;
udelay(10);
}
if (thermal_spin)
IWL_DEBUG_INFO("Thermal calibration took %dus\n",
thermal_spin * 10);
} else
set_bit(STATUS_RF_KILL_HW, &priv->status);
/* After the ALIVE response, we can process host commands */
set_bit(STATUS_ALIVE, &priv->status);
/* Clear out the uCode error bit if it is set */
clear_bit(STATUS_FW_ERROR, &priv->status);
rc = iwl_init_channel_map(priv);
if (rc) {
IWL_ERROR("initializing regulatory failed: %d\n", rc);
return;
}
iwl_init_geos(priv);
if (iwl_is_rfkill(priv))
return;
if (!priv->mac80211_registered) {
/* Unlock so any user space entry points can call back into
* the driver without a deadlock... */
mutex_unlock(&priv->mutex);
iwl_rate_control_register(priv->hw);
rc = ieee80211_register_hw(priv->hw);
priv->hw->conf.beacon_int = 100;
mutex_lock(&priv->mutex);
if (rc) {
IWL_ERROR("Failed to register network "
"device (error %d)\n", rc);
return;
}
priv->mac80211_registered = 1;
iwl_reset_channel_flag(priv);
} else
ieee80211_start_queues(priv->hw);
priv->active_rate = priv->rates_mask;
priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
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);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
}
/* Configure BT coexistence */
iwl_send_bt_config(priv);
/* Configure the adapter for unassociated operation */
iwl_commit_rxon(priv);
/* At this point, the NIC is initialized and operational */
priv->notif_missed_beacons = 0;
set_bit(STATUS_READY, &priv->status);
iwl3945_reg_txpower_periodic(priv);
IWL_DEBUG_INFO("ALIVE processing complete.\n");
if (priv->error_recovering)
iwl_error_recovery(priv);
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);
struct ieee80211_conf *conf = NULL;
IWL_DEBUG_INFO(DRV_NAME " is going down\n");
conf = ieee80211_get_hw_conf(priv->hw);
if (!exit_pending)
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl_clear_stations_table(priv);
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
iwl_cancel_deferred_work(priv);
/* 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 */
iwl_disable_interrupts(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_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND;
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_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND |
test_bit(STATUS_FW_ERROR, &priv->status) <<
STATUS_FW_ERROR;
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_hw_txq_ctx_stop(priv);
iwl_hw_rxq_stop(priv);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_grab_restricted_access(priv)) {
iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
APMG_CLK_VAL_DMA_CLK_RQT);
iwl_release_restricted_access(priv);
}
spin_unlock_irqrestore(&priv->lock, flags);
udelay(5);
iwl_hw_nic_stop_master(priv);
iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
iwl_hw_nic_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);
}
#define MAX_HW_RESTARTS 5
static int __iwl_up(struct iwl_priv *priv)
{
DECLARE_MAC_BUF(mac);
int rc, i;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARNING("Exit pending; will not bring the NIC up\n");
return -EIO;
}
if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
IWL_WARNING("Radio disabled by SW RF kill (module "
"parameter)\n");
return 0;
}
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl_hw_nic_init(priv);
if (rc) {
IWL_ERROR("Unable to int nic\n");
return rc;
}
/* 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 */
rc = iwl_load_bsm(priv);
if (rc) {
IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
continue;
}
/* start card; "initialize" will load runtime ucode */
iwl_nic_start(priv);
/* MAC Address location in EEPROM same for 3945/4965 */
get_eeprom_mac(priv, priv->mac_addr);
IWL_DEBUG_INFO("MAC address: %s\n",
print_mac(mac, priv->mac_addr));
SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
return 0;
}
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl_down(priv);
/* 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);
iwl_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_INFO | 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 {
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);
}
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
static void iwl_bg_scan_check(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, scan_check.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
if (test_bit(STATUS_SCANNING, &priv->status) ||
test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
"Scan completion watchdog resetting adapter (%dms)\n",
jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
iwl_send_scan_abort(priv);
}
mutex_unlock(&priv->mutex);
}
static void iwl_bg_request_scan(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, request_scan);
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_CMD,
.len = sizeof(struct iwl_scan_cmd),
.meta.flags = CMD_SIZE_HUGE,
};
int rc = 0;
struct iwl_scan_cmd *scan;
struct ieee80211_conf *conf = NULL;
u8 direct_mask;
int phymode;
conf = ieee80211_get_hw_conf(priv->hw);
mutex_lock(&priv->mutex);
if (!iwl_is_ready(priv)) {
IWL_WARNING("request scan called when driver not ready.\n");
goto done;
}
/* Make sure the scan wasn't cancelled before this queued work
* was given the chance to run... */
if (!test_bit(STATUS_SCANNING, &priv->status))
goto done;
/* This should never be called or scheduled if there is currently
* a scan active in the hardware. */
if (test_bit(STATUS_SCAN_HW, &priv->status)) {
IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
"Ignoring second request.\n");
rc = -EIO;
goto done;
}
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
goto done;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
goto done;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
goto done;
}
if (!test_bit(STATUS_READY, &priv->status)) {
IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
goto done;
}
if (!priv->scan_bands) {
IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
goto done;
}
if (!priv->scan) {
priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan) {
rc = -ENOMEM;
goto done;
}
}
scan = priv->scan;
memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
if (iwl_is_associated(priv)) {
u16 interval = 0;
u32 extra;
u32 suspend_time = 100;
u32 scan_suspend_time = 100;
unsigned long flags;
IWL_DEBUG_INFO("Scanning while associated...\n");
spin_lock_irqsave(&priv->lock, flags);
interval = priv->beacon_int;
spin_unlock_irqrestore(&priv->lock, flags);
scan->suspend_time = 0;
scan->max_out_time = cpu_to_le32(200 * 1024);
if (!interval)
interval = suspend_time;
/*
* suspend time format:
* 0-19: beacon interval in usec (time before exec.)
* 20-23: 0
* 24-31: number of beacons (suspend between channels)
*/
extra = (suspend_time / interval) << 24;
scan_suspend_time = 0xFF0FFFFF &
(extra | ((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
}
/* We should add the ability for user to lock to PASSIVE ONLY */
if (priv->one_direct_scan) {
IWL_DEBUG_SCAN
("Kicking off one direct scan for '%s'\n",
iwl_escape_essid(priv->direct_ssid,
priv->direct_ssid_len));
scan->direct_scan[0].id = WLAN_EID_SSID;
scan->direct_scan[0].len = priv->direct_ssid_len;
memcpy(scan->direct_scan[0].ssid,
priv->direct_ssid, priv->direct_ssid_len);
direct_mask = 1;
} else if (!iwl_is_associated(priv) && priv->essid_len) {
scan->direct_scan[0].id = WLAN_EID_SSID;
scan->direct_scan[0].len = priv->essid_len;
memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
direct_mask = 1;
} else
direct_mask = 0;
/* We don't build a direct scan probe request; the uCode will do
* that based on the direct_mask added to each channel entry */
scan->tx_cmd.len = cpu_to_le16(
iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
/* flags + rate selection */
switch (priv->scan_bands) {
case 2:
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
scan->good_CRC_th = 0;
phymode = MODE_IEEE80211G;
break;
case 1:
scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
scan->good_CRC_th = IWL_GOOD_CRC_TH;
phymode = MODE_IEEE80211A;
break;
default:
IWL_WARNING("Invalid scan band count\n");
goto done;
}
/* select Rx antennas */
scan->flags |= iwl3945_get_antenna_flags(priv);
if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
if (direct_mask)
IWL_DEBUG_SCAN
("Initiating direct scan for %s.\n",
iwl_escape_essid(priv->essid, priv->essid_len));
else
IWL_DEBUG_SCAN("Initiating indirect scan.\n");
scan->channel_count =
iwl_get_channels_for_scan(
priv, phymode, 1, /* active */
direct_mask,
(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
cmd.len += le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct iwl_scan_channel);
cmd.data = scan;
scan->len = cpu_to_le16(cmd.len);
set_bit(STATUS_SCAN_HW, &priv->status);
rc = iwl_send_cmd_sync(priv, &cmd);
if (rc)
goto done;
queue_delayed_work(priv->workqueue, &priv->scan_check,
IWL_SCAN_CHECK_WATCHDOG);
mutex_unlock(&priv->mutex);
return;
done:
/* inform mac80211 sacn aborted */
queue_work(priv->workqueue, &priv->scan_completed);
mutex_unlock(&priv->mutex);
}
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);
}
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);
}
static void iwl_bg_post_associate(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv,
post_associate.work);
int rc = 0;
struct ieee80211_conf *conf = NULL;
DECLARE_MAC_BUF(mac);
if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
return;
}
IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
priv->assoc_id,
print_mac(mac, priv->active_rxon.bssid_addr));
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
if (!priv->interface_id || !priv->is_open) {
mutex_unlock(&priv->mutex);
return;
}
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);
memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
iwl_setup_rxon_timing(priv);
rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (rc)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
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 == IEEE80211_IF_TYPE_IBSS)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
}
iwl_commit_rxon(priv);
switch (priv->iw_mode) {
case IEEE80211_IF_TYPE_STA:
iwl_rate_scale_init(priv->hw, IWL_AP_ID);
break;
case IEEE80211_IF_TYPE_IBSS:
/* clear out the station table */
iwl_clear_stations_table(priv);
iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
iwl_add_station(priv, priv->bssid, 0, 0);
iwl3945_sync_sta(priv, IWL_STA_ID,
(priv->phymode == MODE_IEEE80211A)?
IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
CMD_ASYNC);
iwl_rate_scale_init(priv->hw, IWL_STA_ID);
iwl_send_beacon_cmd(priv);
break;
default:
IWL_ERROR("%s Should not be called in %d mode\n",
__FUNCTION__, priv->iw_mode);
break;
}
iwl_sequence_reset(priv);
#ifdef CONFIG_IWLWIFI_QOS
iwl_activate_qos(priv, 0);
#endif /* CONFIG_IWLWIFI_QOS */
mutex_unlock(&priv->mutex);
}
static void iwl_bg_abort_scan(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv,
abort_scan);
if (!iwl_is_ready(priv))
return;
mutex_lock(&priv->mutex);
set_bit(STATUS_SCAN_ABORTING, &priv->status);
iwl_send_scan_abort(priv);
mutex_unlock(&priv->mutex);
}
static void iwl_bg_scan_completed(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, scan_completed);
IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
ieee80211_scan_completed(priv->hw);
/* Since setting the TXPOWER may have been deferred while
* performing the scan, fire one off */
mutex_lock(&priv->mutex);
iwl_hw_reg_send_txpower(priv);
mutex_unlock(&priv->mutex);
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
static int iwl_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
priv->is_open = 1;
if (!iwl_is_rfkill(priv))
ieee80211_start_queues(priv->hw);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static void iwl_mac_stop(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
mutex_lock(&priv->mutex);
/* stop mac, cancel any scan request and clear
* RXON_FILTER_ASSOC_MSK BIT
*/
priv->is_open = 0;
iwl_scan_cancel_timeout(priv, 100);
cancel_delayed_work(&priv->post_associate);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_control *ctl)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
IWL_DEBUG_MAC80211("leave - monitor\n");
return -1;
}
IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
ctl->tx_rate);
if (iwl_tx_skb(priv, skb, ctl))
dev_kfree_skb_any(skb);
IWL_DEBUG_MAC80211("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;
DECLARE_MAC_BUF(mac);
IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
if (priv->interface_id) {
IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
return -EOPNOTSUPP;
}
spin_lock_irqsave(&priv->lock, flags);
priv->interface_id = conf->if_id;
spin_unlock_irqrestore(&priv->lock, flags);
mutex_lock(&priv->mutex);
if (conf->mac_addr) {
IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
}
iwl_set_mode(priv, conf->type);
IWL_DEBUG_MAC80211("leave\n");
mutex_unlock(&priv->mutex);
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, struct ieee80211_conf *conf)
{
struct iwl_priv *priv = hw->priv;
const struct iwl_channel_info *ch_info;
unsigned long flags;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
mutex_unlock(&priv->mutex);
return -EIO;
}
/* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
* what is exposed through include/ declrations */
if (unlikely(!iwl_param_disable_hw_scan &&
test_bit(STATUS_SCANNING, &priv->status))) {
IWL_DEBUG_MAC80211("leave - scanning\n");
mutex_unlock(&priv->mutex);
return 0;
}
spin_lock_irqsave(&priv->lock, flags);
ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
conf->channel, conf->phymode);
IWL_DEBUG_MAC80211("leave - invalid channel\n");
spin_unlock_irqrestore(&priv->lock, flags);
mutex_unlock(&priv->mutex);
return -EINVAL;
}
iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
iwl_set_flags_for_phymode(priv, conf->phymode);
/* The list of supported rates and rate mask can be different
* for each phymode; since the phymode 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);
mutex_unlock(&priv->mutex);
return 0;
}
#endif
iwl_radio_kill_sw(priv, !conf->radio_enabled);
if (!conf->radio_enabled) {
IWL_DEBUG_MAC80211("leave - radio disabled\n");
mutex_unlock(&priv->mutex);
return 0;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_MAC80211("leave - RF kill\n");
mutex_unlock(&priv->mutex);
return -EIO;
}
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");
mutex_unlock(&priv->mutex);
return 0;
}
static void iwl_config_ap(struct iwl_priv *priv)
{
int rc = 0;
if (priv->status & STATUS_EXIT_PENDING)
return;
/* The following should be done only at AP bring up */
if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
/* RXON - unassoc (to set timing command) */
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
/* RXON Timing */
memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
iwl_setup_rxon_timing(priv);
rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (rc)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
/* 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 == IEEE80211_IF_TYPE_IBSS)
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);
iwl_add_station(priv, BROADCAST_ADDR, 0, 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, int if_id,
struct ieee80211_if_conf *conf)
{
struct iwl_priv *priv = hw->priv;
DECLARE_MAC_BUF(mac);
unsigned long flags;
int rc;
if (conf == NULL)
return -EIO;
/* XXX: this MUST use conf->mac_addr */
if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
(!conf->beacon || !conf->ssid_len)) {
IWL_DEBUG_MAC80211
("Leaving in AP mode because HostAPD is not ready.\n");
return 0;
}
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
if (conf->bssid)
IWL_DEBUG_MAC80211("bssid: %s\n",
print_mac(mac, 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 (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
IWL_DEBUG_MAC80211("leave - scanning\n");
mutex_unlock(&priv->mutex);
return 0;
}
if (priv->interface_id != if_id) {
IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
mutex_unlock(&priv->mutex);
return 0;
}
if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
if (!conf->bssid) {
conf->bssid = priv->mac_addr;
memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
IWL_DEBUG_MAC80211("bssid was set to: %s\n",
print_mac(mac, conf->bssid));
}
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = conf->beacon;
}
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 == IEEE80211_IF_TYPE_AP)
iwl_config_ap(priv);
else {
rc = iwl_commit_rxon(priv);
if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
iwl_add_station(priv,
priv->active_rxon.bssid_addr, 1, 0);
}
} else {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
}
spin_lock_irqsave(&priv->lock, flags);
if (!conf->ssid_len)
memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
else
memcpy(priv->essid, conf->ssid, conf->ssid_len);
priv->essid_len = conf->ssid_len;
spin_unlock_irqrestore(&priv->lock, flags);
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)
{
/*
* XXX: dummy
* see also iwl_connection_init_rx_config
*/
*total_flags = 0;
}
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);
iwl_scan_cancel_timeout(priv, 100);
cancel_delayed_work(&priv->post_associate);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
if (priv->interface_id == conf->if_id) {
priv->interface_id = 0;
memset(priv->bssid, 0, ETH_ALEN);
memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
priv->essid_len = 0;
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
}
#define IWL_DELAY_NEXT_SCAN (HZ*2)
static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
{
int rc = 0;
unsigned long flags;
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
mutex_lock(&priv->mutex);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
rc = -EIO;
IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
goto out_unlock;
}
if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
rc = -EIO;
IWL_ERROR("ERROR: APs don't scan\n");
goto out_unlock;
}
/* if we just finished scan ask for delay */
if (priv->last_scan_jiffies &&
time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
jiffies)) {
rc = -EAGAIN;
goto out_unlock;
}
if (len) {
IWL_DEBUG_SCAN("direct scan for "
"%s [%d]\n ",
iwl_escape_essid(ssid, len), (int)len);
priv->one_direct_scan = 1;
priv->direct_ssid_len = (u8)
min((u8) len, (u8) IW_ESSID_MAX_SIZE);
memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
} else
priv->one_direct_scan = 0;
rc = iwl_scan_initiate(priv);
IWL_DEBUG_MAC80211("leave\n");
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
mutex_unlock(&priv->mutex);
return rc;
}
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 rc = 0;
u8 sta_id;
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_param_hwcrypto) {
IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
if (is_zero_ether_addr(addr))
/* only support pairwise keys */
return -EOPNOTSUPP;
sta_id = iwl_hw_find_station(priv, addr);
if (sta_id == IWL_INVALID_STATION) {
DECLARE_MAC_BUF(mac);
IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
print_mac(mac, addr));
return -EINVAL;
}
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
switch (cmd) {
case SET_KEY:
rc = iwl_update_sta_key_info(priv, key, sta_id);
if (!rc) {
iwl_set_rxon_hwcrypto(priv, 1);
iwl_commit_rxon(priv);
key->hw_key_idx = sta_id;
IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
}
break;
case DISABLE_KEY:
rc = iwl_clear_sta_key_info(priv, sta_id);
if (!rc) {
iwl_set_rxon_hwcrypto(priv, 0);
iwl_commit_rxon(priv);
IWL_DEBUG_MAC80211("disable hwcrypto key\n");
}
break;
default:
rc = -EINVAL;
}
IWL_DEBUG_MAC80211("leave\n");
mutex_unlock(&priv->mutex);
return rc;
}
static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
const struct ieee80211_tx_queue_params *params)
{
struct iwl_priv *priv = hw->priv;
#ifdef CONFIG_IWLWIFI_QOS
unsigned long flags;
int q;
#endif /* CONFIG_IWL_QOS */
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;
}
#ifdef CONFIG_IWLWIFI_QOS
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->burst_time * 100));
priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
priv->qos_data.qos_active = 1;
spin_unlock_irqrestore(&priv->lock, flags);
mutex_lock(&priv->mutex);
if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
iwl_activate_qos(priv, 1);
else if (priv->assoc_id && iwl_is_associated(priv))
iwl_activate_qos(priv, 0);
mutex_unlock(&priv->mutex);
#endif /*CONFIG_IWLWIFI_QOS */
IWL_DEBUG_MAC80211("leave\n");
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->data[i].len = q->n_window - avail;
stats->data[i].limit = q->n_window - q->high_mark;
stats->data[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)
{
IWL_DEBUG_MAC80211("enter\n");
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
{
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");
#ifdef CONFIG_IWLWIFI_QOS
iwl_reset_qos(priv);
#endif
cancel_delayed_work(&priv->post_associate);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = 0;
priv->assoc_capability = 0;
priv->call_post_assoc_from_beacon = 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->timestamp1 = 0;
priv->timestamp0 = 0;
if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
priv->beacon_int = 0;
spin_unlock_irqrestore(&priv->lock, flags);
/* we are restarting association process
* clear RXON_FILTER_ASSOC_MSK bit
*/
if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
iwl_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl_commit_rxon(priv);
}
/* Per mac80211.h: This is only used in IBSS mode... */
if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
IWL_DEBUG_MAC80211("leave - not in IBSS\n");
mutex_unlock(&priv->mutex);
return;
}
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
mutex_unlock(&priv->mutex);
return;
}
priv->only_active_channel = 0;
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 ieee80211_tx_control *control)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - RF not ready\n");
mutex_unlock(&priv->mutex);
return -EIO;
}
if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
IWL_DEBUG_MAC80211("leave - not IBSS\n");
mutex_unlock(&priv->mutex);
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;
IWL_DEBUG_MAC80211("leave\n");
spin_unlock_irqrestore(&priv->lock, flags);
#ifdef CONFIG_IWLWIFI_QOS
iwl_reset_qos(priv);
#endif
queue_work(priv->workqueue, &priv->post_associate.work);
mutex_unlock(&priv->mutex);
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_driver *d, char *buf)
{
return sprintf(buf, "0x%08X\n", iwl_debug_level);
}
static ssize_t store_debug_level(struct device_driver *d,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
val = simple_strtoul(p, &p, 0);
if (p == buf)
printk(KERN_INFO DRV_NAME
": %s is not in hex or decimal form.\n", buf);
else
iwl_debug_level = val;
return strnlen(buf, count);
}
static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
show_debug_level, store_debug_level);
#endif /* CONFIG_IWLWIFI_DEBUG */
static ssize_t show_rf_kill(struct device *d,
struct device_attribute *attr, char *buf)
{
/*
* 0 - RF kill not enabled
* 1 - SW based RF kill active (sysfs)
* 2 - HW based RF kill active
* 3 - Both HW and SW based RF kill active
*/
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
(test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
return sprintf(buf, "%i\n", val);
}
static ssize_t store_rf_kill(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
mutex_lock(&priv->mutex);
iwl_radio_kill_sw(priv, buf[0] == '1');
mutex_unlock(&priv->mutex);
return count;
}
static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
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", iwl_hw_get_temperature(priv));
}
static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
static ssize_t show_rs_window(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct iwl_priv *priv = d->driver_data;
return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
}
static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, 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->user_txpower_limit);
}
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;
char *p = (char *)buf;
u32 val;
val = simple_strtoul(p, &p, 10);
if (p == buf)
printk(KERN_INFO DRV_NAME
": %s is not in decimal form.\n", buf);
else
iwl_hw_reg_set_txpower(priv, val);
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;
u32 flags = simple_strtoul(buf, NULL, 0);
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("Committing 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;
u32 filter_flags = simple_strtoul(buf, NULL, 0);
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 show_tune(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->phymode << 8) |
le16_to_cpu(priv->active_rxon.channel));
}
static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
static ssize_t store_tune(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
char *p = (char *)buf;
u16 tune = simple_strtoul(p, &p, 0);
u8 phymode = (tune >> 8) & 0xff;
u16 channel = tune & 0xff;
IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
mutex_lock(&priv->mutex);
if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
(priv->phymode != phymode)) {
const struct iwl_channel_info *ch_info;
ch_info = iwl_get_channel_info(priv, phymode, channel);
if (!ch_info) {
IWL_WARNING("Requested invalid phymode/channel "
"combination: %d %d\n", phymode, channel);
mutex_unlock(&priv->mutex);
return -EINVAL;
}
/* Cancel any currently running scans... */
if (iwl_scan_cancel_timeout(priv, 100))
IWL_WARNING("Could not cancel scan.\n");
else {
IWL_DEBUG_INFO("Committing phymode and "
"rxon.channel = %d %d\n",
phymode, channel);
iwl_set_rxon_channel(priv, phymode, channel);
iwl_set_flags_for_phymode(priv, phymode);
iwl_set_rate(priv);
iwl_commit_rxon(priv);
}
}
mutex_unlock(&priv->mutex);
return count;
}
static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
static ssize_t show_measurement(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
struct iwl_spectrum_notification measure_report;
u32 size = sizeof(measure_report), len = 0, ofs = 0;
u8 *data = (u8 *) & measure_report;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
if (!(priv->measurement_status & MEASUREMENT_READY)) {
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
memcpy(&measure_report, &priv->measure_report, size);
priv->measurement_status = 0;
spin_unlock_irqrestore(&priv->lock, flags);
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 ssize_t store_measurement(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
struct ieee80211_measurement_params params = {
.channel = le16_to_cpu(priv->active_rxon.channel),
.start_time = cpu_to_le64(priv->last_tsf),
.duration = cpu_to_le16(1),
};
u8 type = IWL_MEASURE_BASIC;
u8 buffer[32];
u8 channel;
if (count) {
char *p = buffer;
strncpy(buffer, buf, min(sizeof(buffer), count));
channel = simple_strtoul(p, NULL, 0);
if (channel)
params.channel = channel;
p = buffer;
while (*p && *p != ' ')
p++;
if (*p)
type = simple_strtoul(p + 1, NULL, 0);
}
IWL_DEBUG_INFO("Invoking measurement of type %d on "
"channel %d (for '%s')\n", type, params.channel, buf);
iwl_get_measurement(priv, &params, type);
return count;
}
static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
show_measurement, store_measurement);
#endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
static ssize_t show_rate(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
unsigned long flags;
int i;
spin_lock_irqsave(&priv->sta_lock, flags);
if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
i = priv->stations[IWL_AP_ID].current_rate.s.rate;
else
i = priv->stations[IWL_STA_ID].current_rate.s.rate;
spin_unlock_irqrestore(&priv->sta_lock, flags);
i = iwl_rate_index_from_plcp(i);
if (i == -1)
return sprintf(buf, "0\n");
return sprintf(buf, "%d%s\n",
(iwl_rates[i].ieee >> 1),
(iwl_rates[i].ieee & 0x1) ? ".5" : "");
}
static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
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);
priv->retry_rate = simple_strtoul(buf, NULL, 0);
if (priv->retry_rate <= 0)
priv->retry_rate = 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 rc;
int mode;
mode = simple_strtoul(buf, NULL, 0);
mutex_lock(&priv->mutex);
if (!iwl_is_ready(priv)) {
rc = -EAGAIN;
goto out;
}
if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
mode = IWL_POWER_AC;
else
mode |= IWL_POWER_ENABLED;
if (mode != priv->power_mode) {
rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
if (rc) {
IWL_DEBUG_MAC80211("failed setting power mode.\n");
goto out;
}
priv->power_mode = mode;
}
rc = count;
out:
mutex_unlock(&priv->mutex);
return rc;
}
#define MAX_WX_STRING 80
/* Values are in microsecond */
static const s32 timeout_duration[] = {
350000,
250000,
75000,
37000,
25000,
};
static const s32 period_duration[] = {
400000,
700000,
1000000,
1000000,
1000000
};
static ssize_t show_power_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
int level = IWL_POWER_LEVEL(priv->power_mode);
char *p = buf;
p += sprintf(p, "%d ", level);
switch (level) {
case IWL_POWER_MODE_CAM:
case IWL_POWER_AC:
p += sprintf(p, "(AC)");
break;
case IWL_POWER_BATTERY:
p += sprintf(p, "(BATTERY)");
break;
default:
p += sprintf(p,
"(Timeout %dms, Period %dms)",
timeout_duration[level - 1] / 1000,
period_duration[level - 1] / 1000);
}
if (!(priv->power_mode & IWL_POWER_ENABLED))
p += sprintf(p, " OFF\n");
else
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);
int len = 0, i;
struct ieee80211_channel *channels = NULL;
const struct ieee80211_hw_mode *hw_mode = NULL;
int count = 0;
if (!iwl_is_ready(priv))
return -EAGAIN;
hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
if (!hw_mode)
hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
if (hw_mode) {
channels = hw_mode->channels;
count = hw_mode->num_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",
channels[i].chan,
channels[i].power_level,
channels[i].
flag & IEEE80211_CHAN_W_RADAR_DETECT ?
" (IEEE 802.11h required)" : "",
(!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
|| (channels[i].
flag &
IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
", IBSS",
channels[i].
flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
"active/passive" : "passive only");
hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
if (hw_mode) {
channels = hw_mode->channels;
count = hw_mode->num_channels;
} else {
channels = NULL;
count = 0;
}
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",
channels[i].chan,
channels[i].power_level,
channels[i].
flag & IEEE80211_CHAN_W_RADAR_DETECT ?
" (IEEE 802.11h required)" : "",
(!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
|| (channels[i].
flag &
IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
", IBSS",
channels[i].
flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
"active/passive" : "passive only");
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);
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_antenna(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
if (!iwl_is_alive(priv))
return -EAGAIN;
return sprintf(buf, "%d\n", priv->antenna);
}
static ssize_t store_antenna(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ant;
struct iwl_priv *priv = dev_get_drvdata(d);
if (count == 0)
return 0;
if (sscanf(buf, "%1i", &ant) != 1) {
IWL_DEBUG_INFO("not in hex or decimal form.\n");
return count;
}
if ((ant >= 0) && (ant <= 2)) {
IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
priv->antenna = (enum iwl_antenna)ant;
} else
IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
return count;
}
static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
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);
static ssize_t dump_error_log(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
char *p = (char *)buf;
if (p[0] == '1')
iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
return strnlen(buf, count);
}
static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
static ssize_t dump_event_log(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
char *p = (char *)buf;
if (p[0] == '1')
iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
return strnlen(buf, count);
}
static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
/*****************************************************************************
*
* 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->scan_completed, iwl_bg_scan_completed);
INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
iwl_hw_setup_deferred_work(priv);
tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
iwl_irq_tasklet, (unsigned long)priv);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
iwl_hw_cancel_deferred_work(priv);
cancel_delayed_work_sync(&priv->init_alive_start);
cancel_delayed_work(&priv->scan_check);
cancel_delayed_work(&priv->alive_start);
cancel_delayed_work(&priv->post_associate);
cancel_work_sync(&priv->beacon_update);
}
static struct attribute *iwl_sysfs_entries[] = {
&dev_attr_antenna.attr,
&dev_attr_channels.attr,
&dev_attr_dump_errors.attr,
&dev_attr_dump_events.attr,
&dev_attr_flags.attr,
&dev_attr_filter_flags.attr,
#ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
&dev_attr_measurement.attr,
#endif
&dev_attr_power_level.attr,
&dev_attr_rate.attr,
&dev_attr_retry_rate.attr,
&dev_attr_rf_kill.attr,
&dev_attr_rs_window.attr,
&dev_attr_statistics.attr,
&dev_attr_status.attr,
&dev_attr_temperature.attr,
&dev_attr_tune.attr,
&dev_attr_tx_power.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,
.get_stats = iwl_mac_get_stats,
.get_tx_stats = iwl_mac_get_tx_stats,
.conf_tx = iwl_mac_conf_tx,
.get_tsf = iwl_mac_get_tsf,
.reset_tsf = iwl_mac_reset_tsf,
.beacon_update = iwl_mac_beacon_update,
.hw_scan = iwl_mac_hw_scan
};
static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = 0;
u32 pci_id;
struct iwl_priv *priv;
struct ieee80211_hw *hw;
int i;
if (iwl_param_disable_hw_scan) {
IWL_DEBUG_INFO("Disabling hw_scan\n");
iwl_hw_ops.hw_scan = NULL;
}
if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
(iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
IWL_ERROR("invalid queues_num, should be between %d and %d\n",
IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
err = -EINVAL;
goto out;
}
/* mac80211 allocates memory for this device instance, including
* space for this driver's private structure */
hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
if (hw == NULL) {
IWL_ERROR("Can not allocate network device\n");
err = -ENOMEM;
goto out;
}
SET_IEEE80211_DEV(hw, &pdev->dev);
hw->rate_control_algorithm = "iwl-3945-rs";
IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
priv = hw->priv;
priv->hw = hw;
priv->pci_dev = pdev;
priv->antenna = (enum iwl_antenna)iwl_param_antenna;
#ifdef CONFIG_IWLWIFI_DEBUG
iwl_debug_level = iwl_param_debug;
atomic_set(&priv->restrict_refcnt, 0);
#endif
priv->retry_rate = 1;
priv->ibss_beacon = NULL;
/* Tell mac80211 and its clients (e.g. Wireless Extensions)
* the range of signal quality values that we'll provide.
* Negative values for level/noise indicate that we'll provide dBm.
* For WE, at least, non-0 values here *enable* display of values
* in app (iwconfig). */
hw->max_rssi = -20; /* signal level, negative indicates dBm */
hw->max_noise = -20; /* noise level, negative indicates dBm */
hw->max_signal = 100; /* link quality indication (%) */
/* Tell mac80211 our Tx characteristics */
hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
hw->queues = 4;
spin_lock_init(&priv->lock);
spin_lock_init(&priv->power_data.lock);
spin_lock_init(&priv->sta_lock);
spin_lock_init(&priv->hcmd_lock);
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
INIT_LIST_HEAD(&priv->free_frames);
mutex_init(&priv->mutex);
if (pci_enable_device(pdev)) {
err = -ENODEV;
goto out_ieee80211_free_hw;
}
pci_set_master(pdev);
iwl_clear_stations_table(priv);
priv->data_retry_limit = -1;
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->phymode = -1;
err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (err) {
printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
goto out_pci_disable_device;
}
pci_set_drvdata(pdev, priv);
err = pci_request_regions(pdev, DRV_NAME);
if (err)
goto out_pci_disable_device;
/* We disable the RETRY_TIMEOUT register (0x41) to keep
* PCI Tx retries from interfering with C3 CPU state */
pci_write_config_byte(pdev, 0x41, 0x00);
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);
/* Initialize module parameter values here */
if (iwl_param_disable) {
set_bit(STATUS_RF_KILL_SW, &priv->status);
IWL_DEBUG_INFO("Radio disabled.\n");
}
priv->iw_mode = IEEE80211_IF_TYPE_STA;
pci_id =
(priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
switch (pci_id) {
case 0x42221005: /* 0x4222 0x8086 0x1005 is BG SKU */
case 0x42221034: /* 0x4222 0x8086 0x1034 is BG SKU */
case 0x42271014: /* 0x4227 0x8086 0x1014 is BG SKU */
case 0x42221044: /* 0x4222 0x8086 0x1044 is BG SKU */
priv->is_abg = 0;
break;
/*
* Rest are assumed ABG SKU -- if this is not the
* case then the card will get the wrong 'Detected'
* line in the kernel log however the code that
* initializes the GEO table will detect no A-band
* channels and remove the is_abg mask.
*/
default:
priv->is_abg = 1;
break;
}
printk(KERN_INFO DRV_NAME
": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
priv->is_abg ? "A" : "");
/* Device-specific setup */
if (iwl_hw_set_hw_setting(priv)) {
IWL_ERROR("failed to set hw settings\n");
mutex_unlock(&priv->mutex);
goto out_iounmap;
}
#ifdef CONFIG_IWLWIFI_QOS
if (iwl_param_qos_enable)
priv->qos_data.qos_enable = 1;
iwl_reset_qos(priv);
priv->qos_data.qos_active = 0;
priv->qos_data.qos_cap.val = 0;
#endif /* CONFIG_IWLWIFI_QOS */
iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
iwl_setup_deferred_work(priv);
iwl_setup_rx_handlers(priv);
priv->rates_mask = IWL_RATES_MASK;
/* If power management is turned on, default to AC mode */
priv->power_mode = IWL_POWER_AC;
priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
pci_enable_msi(pdev);
err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
if (err) {
IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
goto out_disable_msi;
}
mutex_lock(&priv->mutex);
err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
if (err) {
IWL_ERROR("failed to create sysfs device attributes\n");
mutex_unlock(&priv->mutex);
goto out_release_irq;
}
/* fetch ucode file from disk, alloc and copy to bus-master buffers ...
* ucode filename and max sizes are card-specific. */
err = iwl_read_ucode(priv);
if (err) {
IWL_ERROR("Could not read microcode: %d\n", err);
mutex_unlock(&priv->mutex);
goto out_pci_alloc;
}
mutex_unlock(&priv->mutex);
IWL_DEBUG_INFO("Queing UP work.\n");
queue_work(priv->workqueue, &priv->up);
return 0;
out_pci_alloc:
iwl_dealloc_ucode_pci(priv);
sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
out_release_irq:
free_irq(pdev->irq, priv);
out_disable_msi:
pci_disable_msi(pdev);
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
iwl_unset_hw_setting(priv);
out_iounmap:
pci_iounmap(pdev, priv->hw_base);
out_pci_release_regions:
pci_release_regions(pdev);
out_pci_disable_device:
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
out_ieee80211_free_hw:
ieee80211_free_hw(priv->hw);
out:
return err;
}
static void iwl_pci_remove(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
struct list_head *p, *q;
int i;
if (!priv)
return;
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
mutex_lock(&priv->mutex);
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl_down(priv);
mutex_unlock(&priv->mutex);
/* Free MAC hash list for ADHOC */
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
list_del(p);
kfree(list_entry(p, struct iwl_ibss_seq, list));
}
}
sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
iwl_dealloc_ucode_pci(priv);
if (priv->rxq.bd)
iwl_rx_queue_free(priv, &priv->rxq);
iwl_hw_txq_ctx_free(priv);
iwl_unset_hw_setting(priv);
iwl_clear_stations_table(priv);
if (priv->mac80211_registered) {
ieee80211_unregister_hw(priv->hw);
iwl_rate_control_unregister(priv->hw);
}
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
free_irq(pdev->irq, priv);
pci_disable_msi(pdev);
pci_iounmap(pdev, priv->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
kfree(priv->channel_info);
kfree(priv->ieee_channels);
kfree(priv->ieee_rates);
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);
mutex_lock(&priv->mutex);
set_bit(STATUS_IN_SUSPEND, &priv->status);
/* Take down the device; powers it off, etc. */
__iwl_down(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
pci_save_state(pdev);
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
mutex_unlock(&priv->mutex);
return 0;
}
static void iwl_resume(struct iwl_priv *priv)
{
unsigned long flags;
/* The following it a temporary work around due to the
* suspend / resume not fully initializing the NIC correctly.
* Without all of the following, resume will not attempt to take
* down the NIC (it shouldn't really need to) and will just try
* and bring the NIC back up. However that fails during the
* ucode verification process. This then causes iwl_down to be
* called *after* iwl_hw_nic_init() has succeeded -- which
* then lets the next init sequence succeed. So, we've
* replicated all of that NIC init code here... */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
iwl_hw_nic_init(priv);
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);
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
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);
/* tell the device to stop sending interrupts */
iwl_disable_interrupts(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
if (!iwl_grab_restricted_access(priv)) {
iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
APMG_CLK_VAL_DMA_CLK_RQT);
iwl_release_restricted_access(priv);
}
spin_unlock_irqrestore(&priv->lock, flags);
udelay(5);
iwl_hw_nic_reset(priv);
/* Bring the device back up */
clear_bit(STATUS_IN_SUSPEND, &priv->status);
queue_work(priv->workqueue, &priv->up);
}
static int iwl_pci_resume(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
int err;
printk(KERN_INFO "Coming out of suspend...\n");
mutex_lock(&priv->mutex);
pci_set_power_state(pdev, PCI_D0);
err = pci_enable_device(pdev);
pci_restore_state(pdev);
/*
* Suspend/Resume resets the PCI configuration space, so we have to
* re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
* from interfering with C3 CPU state. pci_restore_state won't help
* here since it only restores the first 64 bytes pci config header.
*/
pci_write_config_byte(pdev, 0x41, 0x00);
iwl_resume(priv);
mutex_unlock(&priv->mutex);
return 0;
}
#endif /* CONFIG_PM */
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
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 = pci_register_driver(&iwl_driver);
if (ret) {
IWL_ERROR("Unable to initialize PCI module\n");
return ret;
}
#ifdef CONFIG_IWLWIFI_DEBUG
ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
if (ret) {
IWL_ERROR("Unable to create driver sysfs file\n");
pci_unregister_driver(&iwl_driver);
return ret;
}
#endif
return ret;
}
static void __exit iwl_exit(void)
{
#ifdef CONFIG_IWLWIFI_DEBUG
driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
#endif
pci_unregister_driver(&iwl_driver);
}
module_param_named(antenna, iwl_param_antenna, int, 0444);
MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
module_param_named(disable, iwl_param_disable, int, 0444);
MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
MODULE_PARM_DESC(hwcrypto,
"using hardware crypto engine (default 0 [software])\n");
module_param_named(debug, iwl_param_debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");
module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
module_param_named(queues_num, iwl_param_queues_num, int, 0444);
MODULE_PARM_DESC(queues_num, "number of hw queues.");
/* QoS */
module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
module_exit(iwl_exit);
module_init(iwl_init);
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