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linux / linux / kernel / git / mellanox / linux / e098675635479e9267cf2b12fb969c463cf506ab / . / drivers / net / wireless / iwlwifi / iwl4965-base.c
blob: 883b42f7e9989dff95e085cf6afb6577eb9f7f1a [file] [log] [blame]
/******************************************************************************
*
* Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/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/mac80211.h>
#include <asm/div64.h>
#include "iwl-eeprom.h"
#include "iwl-4965.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-sta.h"
static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
struct iwl4965_tx_queue *txq);
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
* NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif
#define DRV_VERSION IWLWIFI_VERSION VD VS
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
__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_supported_band *iwl4965_get_hw_mode(
struct iwl_priv *priv, enum ieee80211_band band)
{
return priv->hw->wiphy->bands[band];
}
static int iwl4965_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 *iwl4965_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 (iwl4965_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;
}
/*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
* DMA services
*
* Theory of operation
*
* A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
* of buffer descriptors, each of which points to one or more data buffers for
* the device to read from or fill. Driver and device exchange status of each
* queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
* entries in each circular buffer, to protect against confusing empty and full
* queue states.
*
* The device reads or writes the data in the queues via the device's several
* DMA/FIFO channels. Each queue is mapped to a single DMA channel.
*
* 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 4965 operates with up to 17 queues: One receive queue, one transmit
* queue (#4) for sending commands to the device firmware, and 15 other
* Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
*
* See more detailed info in iwl-4965-hw.h.
***************************************************/
int iwl4965_queue_space(const struct iwl4965_queue *q)
{
int s = q->read_ptr - q->write_ptr;
if (q->read_ptr > q->write_ptr)
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;
}
static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
{
return q->write_ptr > q->read_ptr ?
(i >= q->read_ptr && i < q->write_ptr) :
!(i < q->read_ptr && i >= q->write_ptr);
}
static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
{
/* This is for scan command, the big buffer at end of command array */
if (is_huge)
return q->n_window; /* must be power of 2 */
/* Otherwise, use normal size buffers */
return index & (q->n_window - 1);
}
/**
* iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
*/
static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_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->write_ptr = q->read_ptr = 0;
return 0;
}
/**
* iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
*/
static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
struct iwl4965_tx_queue *txq, u32 id)
{
struct pci_dev *dev = priv->pci_dev;
/* Driver private data, only for Tx (not command) queues,
* not shared with device. */
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 auxiliary BD "
"structures failed\n");
goto error;
}
} else
txq->txb = NULL;
/* Circular buffer of transmit frame descriptors (TFDs),
* shared with device */
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;
}
/**
* iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
*/
int iwl4965_tx_queue_init(struct iwl_priv *priv,
struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
{
struct pci_dev *dev = priv->pci_dev;
int len;
int rc = 0;
/*
* Alloc buffer array for commands (Tx or other types of commands).
* For the command queue (#4), allocate command space + one big
* command for scan, since scan command is very huge; the system will
* not have two scans at the same time, so only one is needed.
* For normal Tx queues (all other queues), no super-size command
* space is needed.
*/
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;
/* Alloc driver data array and TFD circular buffer */
rc = iwl4965_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));
/* Initialize queue's high/low-water marks, and head/tail indexes */
iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
/* Tell device where to find queue */
iwl4965_hw_tx_queue_init(priv, txq);
return 0;
}
/**
* iwl4965_tx_queue_free - Deallocate DMA queue.
* @txq: Transmit queue to deallocate.
*
* Empty queue by removing and destroying all BD's.
* Free all buffers.
* 0-fill, but do not free "txq" descriptor structure.
*/
void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
{
struct iwl4965_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->write_ptr != q->read_ptr;
q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
iwl4965_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;
/* De-alloc array of command/tx buffers */
pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
/* De-alloc circular buffer of TFDs */
if (txq->q.n_bd)
pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
txq->q.n_bd, txq->bd, txq->q.dma_addr);
/* De-alloc array of per-TFD driver data */
if (txq->txb) {
kfree(txq->txb);
txq->txb = NULL;
}
/* 0-fill queue descriptor structure */
memset(txq, 0, sizeof(*txq));
}
const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
/*************** STATION TABLE MANAGEMENT ****
* mac80211 should be examined to determine if sta_info is duplicating
* the functionality provided here
*/
/**************************************************************/
#if 0 /* temporary disable till we add real remove station */
/**
* iwl4965_remove_station - Remove driver's knowledge of station.
*
* NOTE: This does not remove station from device's station table.
*/
static u8 iwl4965_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_params.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_params.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
/**
* iwl4965_add_station_flags - Add station to tables in driver and device
*/
u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
int is_ap, u8 flags, void *ht_data)
{
int i;
int index = IWL_INVALID_STATION;
struct iwl4965_station_entry *station;
unsigned long flags_spin;
DECLARE_MAC_BUF(mac);
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_params.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_params.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 two conditions have the same outcome, but keep them separate
since they have different meanings */
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++;
/* Set up the REPLY_ADD_STA command to send to device */
memset(&station->sta, 0, sizeof(struct iwl4965_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;
#ifdef CONFIG_IWL4965_HT
/* BCAST station and IBSS stations do not work in HT mode */
if (index != priv->hw_params.bcast_sta_id &&
priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
iwl4965_set_ht_add_station(priv, index,
(struct ieee80211_ht_info *) ht_data);
#endif /*CONFIG_IWL4965_HT*/
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
/* Add station to device's station table */
iwl4965_send_add_station(priv, &station->sta, flags);
return index;
}
/*************** HOST COMMAND QUEUE FUNCTIONS *****/
/**
* iwl4965_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.
*/
int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
struct iwl4965_queue *q = &txq->q;
struct iwl4965_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 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_is_rfkill(priv)) {
IWL_DEBUG_INFO("Not sending command - RF KILL");
return -EIO;
}
if (iwl4965_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->write_ptr];
memset(tfd, 0, sizeof(*tfd));
control_flags = (u32 *) tfd;
idx = get_cmd_index(q, q->write_ptr, 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->write_ptr));
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);
iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
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->write_ptr, idx, IWL_CMD_QUEUE_NUM);
txq->need_update = 1;
/* Set up entry in queue's byte count circular buffer */
priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
/* Increment and update queue's write index */
q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->hcmd_lock, flags);
return ret ? ret : idx;
}
static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
struct iwl4965_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;
}
/**
* iwl4965_rxon_add_station - add station into station table.
*
* there is only one AP station with id= IWL_AP_ID
* NOTE: mutex must be held before calling this fnction
*/
static int iwl4965_rxon_add_station(struct iwl_priv *priv,
const u8 *addr, int is_ap)
{
u8 sta_id;
/* Add station to device's station table */
#ifdef CONFIG_IWL4965_HT
struct ieee80211_conf *conf = &priv->hw->conf;
struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
if ((is_ap) &&
(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
(priv->iw_mode == IEEE80211_IF_TYPE_STA))
sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
0, cur_ht_config);
else
#endif /* CONFIG_IWL4965_HT */
sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
0, NULL);
/* Set up default rate scaling table in device's station table */
iwl4965_add_station(priv, addr, is_ap);
return sta_id;
}
/**
* iwl4965_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 iwl4965_check_rxon_cmd(struct iwl4965_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 (error)
IWL_WARNING("Tuning to channel %d\n",
le16_to_cpu(rxon->channel));
if (error) {
IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
return -1;
}
return 0;
}
/**
* iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
* If the RXON structure is changing enough to require a new tune,
* or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
* a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
static int iwl4965_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.ofdm_ht_single_stream_basic_rates !=
priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
(priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
(priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
(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;
}
/**
* iwl4965_commit_rxon - commit staging_rxon to hardware
*
* The RXON command in staging_rxon is committed to the hardware and
* the active_rxon structure is updated with the new data. This
* function correctly transitions out of the RXON_ASSOC_MSK state if
* a HW tune is required based on the RXON structure changes.
*/
static int iwl4965_commit_rxon(struct iwl_priv *priv)
{
/* cast away the const for active_rxon in this function */
struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
DECLARE_MAC_BUF(mac);
int rc = 0;
if (!iwl_is_alive(priv))
return -1;
/* always get timestamp with Rx frame */
priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
rc = iwl4965_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
* iwl4965_rxon_assoc_cmd which is used to reconfigure filter
* and other flags for the current radio configuration. */
if (!iwl4965_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;
}
/* station table will be cleared */
priv->assoc_station_added = 0;
#ifdef CONFIG_IWL4965_SENSITIVITY
priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
if (!priv->error_recovering)
priv->start_calib = 0;
iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
#endif /* CONFIG_IWL4965_SENSITIVITY */
/* 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 iwl4965_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));
iwl4965_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
/* Apply the new configuration */
rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
if (rc) {
IWL_ERROR("Error setting new configuration (%d).\n", rc);
return rc;
}
iwlcore_clear_stations_table(priv);
#ifdef CONFIG_IWL4965_SENSITIVITY
if (!priv->error_recovering)
priv->start_calib = 0;
priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
#endif /* CONFIG_IWL4965_SENSITIVITY */
memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
/* 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 = iwl4965_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 (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
IWL_INVALID_STATION) {
IWL_ERROR("Error adding BROADCAST address for transmit.\n");
return -EIO;
}
/* If we have set the ASSOC_MSK and we are in BSS mode then
* add the IWL_AP_ID to the station rate table */
if (iwl_is_associated(priv) &&
(priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
== IWL_INVALID_STATION) {
IWL_ERROR("Error adding AP address for transmit.\n");
return -EIO;
}
priv->assoc_station_added = 1;
if (priv->default_wep_key &&
iwl_send_static_wepkey_cmd(priv, 0))
IWL_ERROR("Could not send WEP static key.\n");
}
return 0;
}
static int iwl4965_send_bt_config(struct iwl_priv *priv)
{
struct iwl4965_bt_cmd bt_cmd = {
.flags = 3,
.lead_time = 0xAA,
.max_kill = 1,
.kill_ack_mask = 0,
.kill_cts_mask = 0,
};
return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
sizeof(struct iwl4965_bt_cmd), &bt_cmd);
}
static int iwl4965_send_scan_abort(struct iwl_priv *priv)
{
int rc = 0;
struct iwl4965_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 iwl4965_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 iwl4965_card_state_sync_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd,
struct sk_buff *skb)
{
return 1;
}
/*
* CARD_STATE_CMD
*
* Use: Sets the device's 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 iwl4965_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 = iwl4965_card_state_sync_callback;
return iwl_send_cmd(priv, &cmd);
}
static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd, struct sk_buff *skb)
{
struct iwl4965_rx_packet *res = NULL;
if (!skb) {
IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
return 1;
}
res = (struct iwl4965_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 iwl4965_send_add_station(struct iwl_priv *priv,
struct iwl4965_addsta_cmd *sta, u8 flags)
{
struct iwl4965_rx_packet *res = NULL;
int rc = 0;
struct iwl_host_cmd cmd = {
.id = REPLY_ADD_STA,
.len = sizeof(struct iwl4965_addsta_cmd),
.meta.flags = flags,
.data = sta,
};
if (flags & CMD_ASYNC)
cmd.meta.u.callback = iwl4965_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 iwl4965_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 void iwl4965_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 iwl4965_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 iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
{
struct iwl4965_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 iwl4965_frame, list);
}
static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
{
memset(frame, 0, sizeof(*frame));
list_add(&frame->list, &priv->free_frames);
}
unsigned int iwl4965_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 u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
{
u8 i;
for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
i = iwl4965_rates[i].next_ieee) {
if (rate_mask & (1 << i))
return iwl4965_rates[i].plcp;
}
return IWL_RATE_INVALID;
}
static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
{
struct iwl4965_frame *frame;
unsigned int frame_size;
int rc;
u8 rate;
frame = iwl4965_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 = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
0xFF0);
if (rate == IWL_INVALID_RATE)
rate = IWL_RATE_6M_PLCP;
} else {
rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
if (rate == IWL_INVALID_RATE)
rate = IWL_RATE_1M_PLCP;
}
frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
&frame->u.cmd[0]);
iwl4965_free_frame(priv, frame);
return rc;
}
/******************************************************************************
*
* Misc. internal state and helper functions
*
******************************************************************************/
static void iwl4965_unset_hw_params(struct iwl_priv *priv)
{
if (priv->shared_virt)
pci_free_consistent(priv->pci_dev,
sizeof(struct iwl4965_shared),
priv->shared_virt,
priv->shared_phys);
}
/**
* iwl4965_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 iwl4965_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] = iwl4965_rates[i].ieee |
((bit & basic_rate) ? 0x80 : 0x00);
(*cnt)++;
(*left)--;
if ((*left <= 0) ||
(*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
break;
}
}
return ret_rates;
}
/**
* iwl4965_fill_probe_req - fill in all required fields and IE for probe request
*/
static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
enum ieee80211_band band,
struct ieee80211_mgmt *frame,
int left, int is_direct)
{
int len = 0;
u8 *pos = NULL;
u16 active_rates, ret_rates, cck_rates, active_rate_basic;
#ifdef CONFIG_IWL4965_HT
const struct ieee80211_supported_band *sband =
iwl4965_get_hw_mode(priv, band);
#endif /* CONFIG_IWL4965_HT */
/* 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, iwl4965_broadcast_addr, ETH_ALEN);
memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
memcpy(frame->bssid, iwl4965_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;
/* exclude 60M rate */
active_rates = priv->rates_mask;
active_rates &= ~IWL_RATE_60M_MASK;
active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
cck_rates = IWL_CCK_RATES_MASK & active_rates;
ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
active_rate_basic, &left);
active_rates &= ~ret_rates;
ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
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;
iwl4965_supported_rate_to_ie(pos, active_rates,
active_rate_basic, &left);
if (*pos > 0)
len += 2 + *pos;
#ifdef CONFIG_IWL4965_HT
if (sband && sband->ht_info.ht_supported) {
struct ieee80211_ht_cap *ht_cap;
pos += (*pos) + 1;
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
ht_cap = (struct ieee80211_ht_cap *)pos;
ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
IEEE80211_HT_CAP_AMPDU_FACTOR) |
((sband->ht_info.ampdu_density << 2) &
IEEE80211_HT_CAP_AMPDU_DENSITY);
len += 2 + sizeof(struct ieee80211_ht_cap);
}
#endif /*CONFIG_IWL4965_HT */
fill_end:
return (u16)len;
}
/*
* QoS support
*/
static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
struct iwl4965_qosparam_cmd *qos)
{
return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
sizeof(struct iwl4965_qosparam_cmd), qos);
}
static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
{
unsigned long flags;
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;
#ifdef CONFIG_IWL4965_HT
if (priv->current_ht_config.is_ht)
priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
#endif /* CONFIG_IWL4965_HT */
spin_unlock_irqrestore(&priv->lock, flags);
if (force || iwl_is_associated(priv)) {
IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
priv->qos_data.qos_active,
priv->qos_data.def_qos_parm.qos_flags);
iwl4965_send_qos_params_command(priv,
&(priv->qos_data.def_qos_parm));
}
}
/*
* Power management (not Tx power!) functions
*/
#define MSEC_TO_USEC 1024
#define NOSLP __constant_cpu_to_le16(0), 0, 0
#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
#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 iwl4965_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 iwl4965_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 iwl4965_power_init_handle(struct iwl_priv *priv)
{
int rc = 0, i;
struct iwl4965_power_mgr *pow_data;
int size = sizeof(struct iwl4965_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 iwl4965_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 iwl4965_update_power_cmd(struct iwl_priv *priv,
struct iwl4965_powertable_cmd *cmd, u32 mode)
{
int rc = 0, i;
u8 skip;
u32 max_sleep = 0;
struct iwl4965_power_vec_entry *range;
u8 period = 0;
struct iwl4965_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 iwl4965_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 iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
{
u32 uninitialized_var(final_mode);
int rc;
struct iwl4965_powertable_cmd cmd;
/* If on battery, set to 3,
* if plugged into AC power, set to CAM ("continuously 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;
}
cmd.keep_alive_beacons = 0;
iwl4965_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 iwl4965_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);
default:
break;
}
return 1;
}
#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
static const char *iwl4965_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";
}
/**
* iwl4965_scan_cancel - Cancel any currently executing HW scan
*
* NOTE: priv->mutex is not required before calling this function
*/
static int iwl4965_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;
}
/**
* iwl4965_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 iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
{
unsigned long now = jiffies;
int ret;
ret = iwl4965_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 iwl4965_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;
iwl4965_scan_cancel(priv);
}
#define MAX_UCODE_BEACON_INTERVAL 4096
#define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
static __le16 iwl4965_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 iwl4965_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->timestamp >> 32);
priv->rxon_timing.timestamp.dw[0] =
cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
tsf = priv->timestamp;
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 =
iwl4965_adjust_beacon_interval(
le16_to_cpu(priv->rxon_timing.beacon_interval));
}
priv->rxon_timing.atim_window = 0;
} else {
priv->rxon_timing.beacon_interval =
iwl4965_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 iwl4965_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 void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
enum ieee80211_band band)
{
if (band == IEEE80211_BAND_5GHZ) {
priv->staging_rxon.flags &=
~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
| RXON_FLG_CCK_MSK);
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
} else {
/* Copied from iwl4965_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;
}
}
/*
* initialize rxon structure with default values from eeprom
*/
static void iwl4965_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;
default:
IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
break;
}
#if 0
/* TODO: Figure out when short_preamble would be set and cache from
* that */
if (!hw_to_local(priv->hw)->short_preamble)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif
ch_info = iwl_get_channel_info(priv, priv->band,
le16_to_cpu(priv->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);
priv->band = ch_info->band;
iwl4965_set_flags_for_phymode(priv, priv->band);
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
iwl4965_set_rxon_chain(priv);
}
static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
{
if (mode == IEEE80211_IF_TYPE_IBSS) {
const struct iwl_channel_info *ch_info;
ch_info = iwl_get_channel_info(priv,
priv->band,
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;
}
}
priv->iw_mode = mode;
iwl4965_connection_init_rx_config(priv);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
iwlcore_clear_stations_table(priv);
/* dont commit rxon if rf-kill is on*/
if (!iwl_is_ready_rf(priv))
return -EAGAIN;
cancel_delayed_work(&priv->scan_check);
if (iwl4965_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;
}
iwl4965_commit_rxon(priv);
return 0;
}
static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
struct ieee80211_tx_control *ctl,
struct iwl_cmd *cmd,
struct sk_buff *skb_frag,
int sta_id)
{
struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
struct iwl_wep_key *wepkey;
int keyidx = 0;
BUG_ON(ctl->key_idx > 3);
switch (keyinfo->alg) {
case ALG_CCMP:
cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
if (ctl->flags & IEEE80211_TXCTL_AMPDU)
cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
break;
case ALG_TKIP:
cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
break;
case ALG_WEP:
wepkey = &priv->wep_keys[ctl->key_idx];
cmd->cmd.tx.sec_ctl = 0;
if (priv->default_wep_key) {
/* the WEP key was sent as static */
keyidx = ctl->key_idx;
memcpy(&cmd->cmd.tx.key[3], wepkey->key,
wepkey->key_size);
if (wepkey->key_size == WEP_KEY_LEN_128)
cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
} else {
/* the WEP key was sent as dynamic */
keyidx = keyinfo->keyidx;
memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
keyinfo->keylen);
if (keyinfo->keylen == WEP_KEY_LEN_128)
cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
}
cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
(keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
IWL_DEBUG_TX("Configuring packet for WEP encryption "
"with key %d\n", keyidx);
break;
default:
printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
break;
}
}
/*
* handle build REPLY_TX command notification.
*/
static void iwl4965_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;
}
if (ieee80211_is_back_request(fc))
tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
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 void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
{
/* 0 - mgmt, 1 - cnt, 2 - data */
int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
priv->tx_stats[idx].cnt++;
priv->tx_stats[idx].bytes += len;
}
/**
* iwl4965_get_sta_id - Find station's index within station table
*
* If new IBSS station, create new entry in station table
*/
static int iwl4965_get_sta_id(struct iwl_priv *priv,
struct ieee80211_hdr *hdr)
{
int sta_id;
u16 fc = le16_to_cpu(hdr->frame_control);
DECLARE_MAC_BUF(mac);
/* If this frame is broadcast or management, use broadcast station id */
if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
is_multicast_ether_addr(hdr->addr1))
return priv->hw_params.bcast_sta_id;
switch (priv->iw_mode) {
/* If we are a client station in a BSS network, use the special
* AP station entry (that's the only station we communicate with) */
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 = iwl4965_hw_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
return priv->hw_params.bcast_sta_id;
/* If this frame is going out to an IBSS network, find the station,
* or create a new station table entry */
case IEEE80211_IF_TYPE_IBSS:
sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
/* Create new station table entry */
sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
0, CMD_ASYNC, NULL);
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_params.bcast_sta_id;
default:
IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
return priv->hw_params.bcast_sta_id;
}
}
/*
* start REPLY_TX command process
*/
static int iwl4965_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 iwl4965_tfd_frame *tfd;
u32 *control_flags;
int txq_id = ctl->queue;
struct iwl4965_tx_queue *txq = NULL;
struct iwl4965_queue *q = NULL;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
dma_addr_t scratch_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->vif) {
IWL_DEBUG_DROP("Dropping - !priv->vif\n");
goto drop_unlock;
}
if ((ctl->tx_rate->hw_value & 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
/* drop all data frame if we are not associated */
if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
(!iwl_is_associated(priv) ||
((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
!priv->assoc_station_added)) {
IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
goto drop_unlock;
}
spin_unlock_irqrestore(&priv->lock, flags);
hdr_len = ieee80211_get_hdrlen(fc);
/* Find (or create) index into station table for destination station */
sta_id = iwl4965_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;
#ifdef CONFIG_IWL4965_HT
/* aggregation is on for this <sta,tid> */
if (ctl->flags & IEEE80211_TXCTL_AMPDU)
txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
priv->stations[sta_id].tid[tid].tfds_in_queue++;
#endif /* CONFIG_IWL4965_HT */
}
/* Descriptor for chosen Tx queue */
txq = &priv->txq[txq_id];
q = &txq->q;
spin_lock_irqsave(&priv->lock, flags);
/* Set up first empty TFD within this queue's circular TFD buffer */
tfd = &txq->bd[q->write_ptr];
memset(tfd, 0, sizeof(*tfd));
control_flags = (u32 *) tfd;
idx = get_cmd_index(q, q->write_ptr, 0);
/* Set up driver data for this TFD */
memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
txq->txb[q->write_ptr].skb[0] = skb;
memcpy(&(txq->txb[q->write_ptr].status.control),
ctl, sizeof(struct ieee80211_tx_control));
/* Set up first empty entry in queue's array of Tx/cmd buffers */
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));
/*
* Set up the Tx-command (not MAC!) header.
* Store the chosen Tx queue and TFD index within the sequence field;
* after Tx, uCode's Tx response will return this value so driver can
* locate the frame within the tx queue and do post-tx processing.
*/
out_cmd->hdr.cmd = REPLY_TX;
out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
INDEX_TO_SEQ(q->write_ptr)));
/* Copy MAC header from skb into command buffer */
memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
/*
* Use the first empty entry in this queue's command buffer array
* to contain the Tx command and MAC header concatenated together
* (payload data will be in another buffer).
* Size of this varies, due to varying MAC header length.
* If end is not dword aligned, we'll have 2 extra bytes at the end
* of the MAC header (device reads on dword boundaries).
* We'll tell device about this padding later.
*/
len = priv->hw_params.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;
/* Physical address of this Tx command's header (not MAC header!),
* within command buffer array. */
txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
offsetof(struct iwl_cmd, hdr);
/* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */
iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
/* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames 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);
iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
}
/* Tell 4965 about any 2-byte padding after MAC header */
if (len_org)
out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
/* Total # bytes to be transmitted */
len = (u16)skb->len;
out_cmd->cmd.tx.len = cpu_to_le16(len);
/* TODO need this for burst mode later on */
iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
/* set is_hcca to 0; it probably will never be implemented */
iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
iwl_update_tx_stats(priv, fc, len);
scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
offsetof(struct iwl4965_tx_cmd, scratch);
out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
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));
/* Set up entry for this TFD in Tx byte-count array */
priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
/* Tell device the write index *just past* this latest filled TFD */
q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->lock, flags);
if (rc)
return rc;
if ((iwl4965_queue_space(q) < q->high_mark)
&& priv->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&priv->lock, flags);
txq->need_update = 1;
iwl4965_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 iwl4965_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_supported_band *hw = NULL;
struct ieee80211_rate *rate;
int i;
hw = iwl4965_get_hw_mode(priv, priv->band);
if (!hw) {
IWL_ERROR("Failed to set rate: unable to get hw mode\n");
return;
}
priv->active_rate = 0;
priv->active_rate_basic = 0;
for (i = 0; i < hw->n_bitrates; i++) {
rate = &(hw->bitrates[i]);
if (rate->hw_value < IWL_RATE_COUNT)
priv->active_rate |= (1 << rate->hw_value);
}
IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
priv->active_rate, priv->active_rate_basic);
/*
* If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
* otherwise set it to the default of all CCK rates and 6, 12, 24 for
* OFDM
*/
if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
priv->staging_rxon.cck_basic_rates =
((priv->active_rate_basic &
IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
else
priv->staging_rxon.cck_basic_rates =
(IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
priv->staging_rxon.ofdm_basic_rates =
((priv->active_rate_basic &
(IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
IWL_FIRST_OFDM_RATE) & 0xFF;
else
priv->staging_rxon.ofdm_basic_rates =
(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}
void iwl4965_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) {
iwl4965_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);
/* call the host command only if no hw rf-kill set */
if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
iwl_is_ready(priv))
iwl4965_send_card_state(priv,
CARD_STATE_CMD_DISABLE,
0);
set_bit(STATUS_RF_KILL_SW, &priv->status);
/* make sure mac80211 stop sending Tx frame */
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
}
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_nic_access(priv))
iwl_release_nic_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 iwl4965_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:
/* The uCode has got a bad phase 1 Key, pushes the packet.
* Decryption will be done in SW. */
if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
RX_RES_STATUS_BAD_KEY_TTAK)
break;
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;
}
}
#define IWL_PACKET_RETRY_TIME HZ
int iwl4965_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 iwl4965_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 iwl4965_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_IWL4965_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 iwl4965_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 iwl4965_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 iwl4965_get_measurement(struct iwl_priv *priv,
struct ieee80211_measurement_params *params,
u8 type)
{
struct iwl4965_spectrum_cmd spectrum;
struct iwl4965_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 =
iwl4965_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 =
iwl4965_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 iwl4965_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 iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
struct iwl4965_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;
}
/**
* iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
*
* 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 the stack that feeds us.
*/
int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
{
struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
struct iwl4965_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->write_ptr, q->read_ptr);
return 0;
}
for (index = iwl_queue_inc_wrap(index, q->n_bd);
q->read_ptr != index;
q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
if (txq_id != IWL_CMD_QUEUE_NUM) {
iwl4965_txstatus_to_ieee(priv,
&(txq->txb[txq->q.read_ptr]));
iwl4965_hw_txq_free_tfd(priv, txq);
} else if (nfreed > 1) {
IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
q->write_ptr, q->read_ptr);
queue_work(priv->workqueue, &priv->restart);
}
nfreed++;
}
/* if (iwl4965_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 iwl4965_is_tx_success(u32 status)
{
status &= TX_STATUS_MSK;
return (status == TX_STATUS_SUCCESS)
|| (status == TX_STATUS_DIRECT_DONE);
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
#ifdef CONFIG_IWL4965_HT
static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
struct ieee80211_hdr *hdr)
{
if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
return IWL_AP_ID;
else {
u8 *da = ieee80211_get_DA(hdr);
return iwl4965_hw_find_station(priv, da);
}
}
static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
struct iwl_priv *priv, int txq_id, int idx)
{
if (priv->txq[txq_id].txb[idx].skb[0])
return (struct ieee80211_hdr *)priv->txq[txq_id].
txb[idx].skb[0]->data;
return NULL;
}
static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
{
__le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
tx_resp->frame_count);
return le32_to_cpu(*scd_ssn) & MAX_SN;
}
/**
* iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
*/
static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
struct iwl4965_ht_agg *agg,
struct iwl4965_tx_resp_agg *tx_resp,
u16 start_idx)
{
u16 status;
struct agg_tx_status *frame_status = &tx_resp->status;
struct ieee80211_tx_status *tx_status = NULL;
struct ieee80211_hdr *hdr = NULL;
int i, sh;
int txq_id, idx;
u16 seq;
if (agg->wait_for_ba)
IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
agg->frame_count = tx_resp->frame_count;
agg->start_idx = start_idx;
agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
agg->bitmap = 0;
/* # frames attempted by Tx command */
if (agg->frame_count == 1) {
/* Only one frame was attempted; no block-ack will arrive */
status = le16_to_cpu(frame_status[0].status);
seq = le16_to_cpu(frame_status[0].sequence);
idx = SEQ_TO_INDEX(seq);
txq_id = SEQ_TO_QUEUE(seq);
/* FIXME: code repetition */
IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
agg->frame_count, agg->start_idx, idx);
tx_status = &(priv->txq[txq_id].txb[idx].status);
tx_status->retry_count = tx_resp->failure_frame;
tx_status->queue_number = status & 0xff;
tx_status->queue_length = tx_resp->failure_rts;
tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
tx_status->flags = iwl4965_is_tx_success(status)?
IEEE80211_TX_STATUS_ACK : 0;
iwl4965_hwrate_to_tx_control(priv,
le32_to_cpu(tx_resp->rate_n_flags),
&tx_status->control);
/* FIXME: code repetition end */
IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
status & 0xff, tx_resp->failure_frame);
IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
agg->wait_for_ba = 0;
} else {
/* Two or more frames were attempted; expect block-ack */
u64 bitmap = 0;
int start = agg->start_idx;
/* Construct bit-map of pending frames within Tx window */
for (i = 0; i < agg->frame_count; i++) {
u16 sc;
status = le16_to_cpu(frame_status[i].status);
seq = le16_to_cpu(frame_status[i].sequence);
idx = SEQ_TO_INDEX(seq);
txq_id = SEQ_TO_QUEUE(seq);
if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
AGG_TX_STATE_ABORT_MSK))
continue;
IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
agg->frame_count, txq_id, idx);
hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
sc = le16_to_cpu(hdr->seq_ctrl);
if (idx != (SEQ_TO_SN(sc) & 0xff)) {
IWL_ERROR("BUG_ON idx doesn't match seq control"
" idx=%d, seq_idx=%d, seq=%d\n",
idx, SEQ_TO_SN(sc),
hdr->seq_ctrl);
return -1;
}
IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
i, idx, SEQ_TO_SN(sc));
sh = idx - start;
if (sh > 64) {
sh = (start - idx) + 0xff;
bitmap = bitmap << sh;
sh = 0;
start = idx;
} else if (sh < -64)
sh = 0xff - (start - idx);
else if (sh < 0) {
sh = start - idx;
start = idx;
bitmap = bitmap << sh;
sh = 0;
}
bitmap |= (1 << sh);
IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
start, (u32)(bitmap & 0xFFFFFFFF));
}
agg->bitmap = bitmap;
agg->start_idx = start;
agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
agg->frame_count, agg->start_idx,
(unsigned long long)agg->bitmap);
if (bitmap)
agg->wait_for_ba = 1;
}
return 0;
}
#endif
/**
* iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
*/
static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_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 iwl4965_tx_queue *txq = &priv->txq[txq_id];
struct ieee80211_tx_status *tx_status;
struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
u32 status = le32_to_cpu(tx_resp->status);
#ifdef CONFIG_IWL4965_HT
int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
struct ieee80211_hdr *hdr;
__le16 *qc;
#endif
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.write_ptr,
txq->q.read_ptr);
return;
}
#ifdef CONFIG_IWL4965_HT
hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
qc = ieee80211_get_qos_ctrl(hdr);
if (qc)
tid = le16_to_cpu(*qc) & 0xf;
sta_id = iwl4965_get_ra_sta_id(priv, hdr);
if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
IWL_ERROR("Station not known\n");
return;
}
if (txq->sched_retry) {
const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
struct iwl4965_ht_agg *agg = NULL;
if (!qc)
return;
agg = &priv->stations[sta_id].tid[tid].agg;
iwl4965_tx_status_reply_tx(priv, agg,
(struct iwl4965_tx_resp_agg *)tx_resp, index);
if ((tx_resp->frame_count == 1) &&
!iwl4965_is_tx_success(status)) {
/* TODO: send BAR */
}
if (txq->q.read_ptr != (scd_ssn & 0xff)) {
int freed;
index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
"%d index %d\n", scd_ssn , index);
freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
txq_id >= 0 && priv->mac80211_registered &&
agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
ieee80211_wake_queue(priv->hw, txq_id);
iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
}
} else {
#endif /* CONFIG_IWL4965_HT */
tx_status = &(txq->txb[txq->q.read_ptr].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 =
iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
&tx_status->control);
IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
"retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
status, le32_to_cpu(tx_resp->rate_n_flags),
tx_resp->failure_frame);
IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
if (index != -1) {
int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
#ifdef CONFIG_IWL4965_HT
if (tid != MAX_TID_COUNT)
priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
(txq_id >= 0) &&
priv->mac80211_registered)
ieee80211_wake_queue(priv->hw, txq_id);
if (tid != MAX_TID_COUNT)
iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
#endif
}
#ifdef CONFIG_IWL4965_HT
}
#endif /* CONFIG_IWL4965_HT */
if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
}
static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_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 iwl4965_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 iwl4965_alive_resp));
pwork = &priv->alive_start;
}
/* We delay the ALIVE response by 5ms to
* give the HW RF Kill time to activate... */
if (palive->is_valid == UCODE_VALID_OK)
queue_delayed_work(priv->workqueue, pwork,
msecs_to_jiffies(5));
else
IWL_WARNING("uCode did not respond OK.\n");
}
static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
return;
}
static void iwl4965_rx_reply_error(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_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 iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
rxon->channel = csa->channel;
priv->staging_rxon.channel = csa->channel;
}
static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_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 iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}
static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_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 iwl4965_bg_beacon_update(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, beacon_update);
struct sk_buff *beacon;
/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
beacon = ieee80211_beacon_get(priv->hw, priv->vif, 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);
iwl4965_send_beacon_cmd(priv);
}
static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
IWL_DEBUG_RX("beacon status %x retries %d iss %d "
"tsf %d %d rate %d\n",
le32_to_cpu(beacon->beacon_notify_hdr.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 iwl4965_rx_reply_scan(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_scanreq_notification *notif =
(struct iwl4965_scanreq_notification *)pkt->u.raw;
IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
#endif
}
/* Service SCAN_START_NOTIFICATION (0x82) */
static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_scanstart_notification *notif =
(struct iwl4965_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 iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_scanresults_notification *notif =
(struct iwl4965_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;
priv->next_scan_jiffies = 0;
}
/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_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;
priv->next_scan_jiffies = 0;
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 iwl4965_rx_card_state_notif(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_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");
if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
RF_CARD_DISABLED)) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
if (!iwl_grab_nic_access(priv)) {
iwl_write_direct32(
priv, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
iwl_release_nic_access(priv);
}
if (!(flags & RXON_CARD_DISABLED)) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
if (!iwl_grab_nic_access(priv)) {
iwl_write_direct32(
priv, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
iwl_release_nic_access(priv);
}
}
if (flags & RF_CARD_DISABLED) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
iwl_read32(priv, CSR_UCODE_DRV_GP1);
if (!iwl_grab_nic_access(priv))
iwl_release_nic_access(priv);
}
}
if (flags & HW_CARD_DISABLED)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
if (flags & SW_CARD_DISABLED)
set_bit(STATUS_RF_KILL_SW, &priv->status);
else
clear_bit(STATUS_RF_KILL_SW, &priv->status);
if (!(flags & RXON_CARD_DISABLED))
iwl4965_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);
}
/**
* iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
*
* Setup the RX handlers for each of the reply types sent from the uCode
* to the host.
*
* This function chains into the hardware specific files for them to setup
* any hardware specific handlers as well.
*/
static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
{
priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
iwl4965_rx_spectrum_measure_notif;
priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
iwl4965_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
/*
* The same handler is used for both the REPLY to a discrete
* statistics request from the host as well as for the periodic
* statistics notifications (after received beacons) from the uCode.
*/
priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
iwl4965_rx_scan_results_notif;
priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
iwl4965_rx_scan_complete_notif;
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
/* Set up hardware specific Rx handlers */
iwl4965_hw_rx_handler_setup(priv);
}
/**
* iwl4965_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 iwl4965_tx_cmd_complete(struct iwl_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (struct iwl4965_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;
iwl4965_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
*
* Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
* each of which point to Receive Buffers to be filled by 4965. These get
* used not only for Rx frames, but for any command response or notification
* from the 4965. The driver and 4965 manage the Rx buffers by means
* of indexes into the circular buffer.
*
* 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 replenish the iwl->rxq->rx_free.
* + In iwl4965_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:
*
* iwl4965_rx_queue_alloc() Allocates rx_free
* iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
* iwl4965_rx_queue_restock
* iwl4965_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 iwl4965_rx_replenish
*
* -- enable interrupts --
* ISR - iwl4965_rx() Detach iwl4965_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 iwl4965_rx_queue_restock to refill any empty
* slots.
* ...
*
*/
/**
* iwl4965_rx_queue_space - Return number of free slots available in queue.
*/
static int iwl4965_rx_queue_space(const struct iwl4965_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;
}
/**
* iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
*/
int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_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 power-saving is in use, make sure device is awake */
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_nic_access(priv);
if (rc)
goto exit_unlock;
/* Device expects a multiple of 8 */
iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
q->write & ~0x7);
iwl_release_nic_access(priv);
/* Else device is assumed to be awake */
} else
/* Device expects a multiple of 8 */
iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
q->need_update = 0;
exit_unlock:
spin_unlock_irqrestore(&q->lock, flags);
return rc;
}
/**
* iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
*/
static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
dma_addr_t dma_addr)
{
return cpu_to_le32((u32)(dma_addr >> 8));
}
/**
* iwl4965_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.
*/
static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
{
struct iwl4965_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl4965_rx_mem_buffer *rxb;
unsigned long flags;
int write, rc;
spin_lock_irqsave(&rxq->lock, flags);
write = rxq->write & ~0x7;
while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
/* Get next free Rx buffer, remove from free list */
element = rxq->rx_free.next;
rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
list_del(element);
/* Point to Rx buffer via next RBD in circular buffer */
rxq->bd[rxq->write] = iwl4965_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.
* Increment device's write pointer in multiples of 8. */
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 = iwl4965_rx_queue_update_write_ptr(priv, rxq);
if (rc)
return rc;
}
return 0;
}
/**
* iwl4965_rx_replenish - 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 iwl4965_rx_queue_restock.
* This is called as a scheduled work item (except for during initialization)
*/
static void iwl4965_rx_allocate(struct iwl_priv *priv)
{
struct iwl4965_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl4965_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 iwl4965_rx_mem_buffer, list);
/* Alloc a new receive buffer */
rxb->skb =
alloc_skb(priv->hw_params.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);
/* Get physical address of RB/SKB */
rxb->dma_addr =
pci_map_single(priv->pci_dev, rxb->skb->data,
priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
}
spin_unlock_irqrestore(&rxq->lock, flags);
}
/*
* this should be called while priv->lock is locked
*/
static void __iwl4965_rx_replenish(void *data)
{
struct iwl_priv *priv = data;
iwl4965_rx_allocate(priv);
iwl4965_rx_queue_restock(priv);
}
void iwl4965_rx_replenish(void *data)
{
struct iwl_priv *priv = data;
unsigned long flags;
iwl4965_rx_allocate(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl4965_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 its 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
*/
static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_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,
priv->hw_params.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 iwl4965_rx_queue_alloc(struct iwl_priv *priv)
{
struct iwl4965_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);
/* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
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 iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_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,
priv->hw_params.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 iwl4965_calc_db_from_ratio(int sig_ratio)
{
/* 1000:1 or higher just report as 60 dB */
if (sig_ratio >= 1000)
return 60;
/* 100:1 or higher, 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 iwl4965_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;
}
/**
* iwl4965_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
* frame-received notifications, and other notifications.
*/
static void iwl4965_rx_handle(struct iwl_priv *priv)
{
struct iwl4965_rx_mem_buffer *rxb;
struct iwl4965_rx_packet *pkt;
struct iwl4965_rx_queue *rxq = &priv->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
u8 fill_rx = 0;
u32 count = 8;
/* uCode's read index (stored in shared DRAM) indicates the last Rx
* buffer that the driver may process (last buffer filled by ucode). */
r = iwl4965_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);
if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
fill_rx = 1;
while (i != r) {
rxb = rxq->queue[i];
/* If an RXB doesn't have a Rx queue slot associated with it,
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
rxq->queue[i] = NULL;
pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
priv->hw_params.rx_buf_size,
PCI_DMA_FROMDEVICE);
pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
/* Reclaim a command buffer only if this packet is a response
* to a (driver-originated) command.
* If the packet (e.g. Rx frame) originated from uCode,
* there is no command buffer to reclaim.
* Ucode should set SEQ_RX_FRAME bit if ucode-originated,
* but apparently a few don't get set; catch them here. */
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
(pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
(pkt->hdr.cmd != REPLY_RX) &&
(pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
(pkt->hdr.cmd != REPLY_TX);
/* Based on type of command response or notification,
* handle those that need handling via function in
* rx_handlers table. See iwl4965_setup_rx_handlers() */
if (priv->rx_handlers[pkt->hdr.cmd]) {
IWL_DEBUG(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)
iwl4965_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,
priv->hw_params.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;
/* If there are a lot of unused frames,
* restock the Rx queue so ucode wont assert. */
if (fill_rx) {
count++;
if (count >= 8) {
priv->rxq.read = i;
__iwl4965_rx_replenish(priv);
count = 0;
}
}
}
/* Backtrack one entry */
priv->rxq.read = i;
iwl4965_rx_queue_restock(priv);
}
/**
* iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
*/
static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
struct iwl4965_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_nic_access(priv);
if (rc)
return rc;
iwl_write_direct32(priv, HBUS_TARG_WRPTR,
txq->q.write_ptr | (txq_id << 8));
iwl_release_nic_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.write_ptr | (txq_id << 8));
txq->need_update = 0;
return rc;
}
#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl4965_print_rx_config_cmd(struct iwl4965_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 iwl4965_enable_interrupts(struct iwl_priv *priv)
{
IWL_DEBUG_ISR("Enabling interrupts\n");
set_bit(STATUS_INT_ENABLED, &priv->status);
iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
}
/* call this function to flush any scheduled tasklet */
static inline void iwl_synchronize_irq(struct iwl_priv *priv)
{
/* wait to make sure we flush pedding tasklet*/
synchronize_irq(priv->pci_dev->irq);
tasklet_kill(&priv->irq_tasklet);
}
static inline void iwl4965_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 iwl4965_dump_nic_error_log(struct iwl_priv *priv)
{
u32 data2, line;
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 (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
return;
}
rc = iwl_grab_nic_access(priv);
if (rc) {
IWL_WARNING("Can not read from adapter at this time.\n");
return;
}
count = iwl_read_targ_mem(priv, base);
if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
IWL_ERROR("Start IWL Error Log Dump:\n");
IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
}
desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
IWL_ERROR("Desc Time "
"data1 data2 line\n");
IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
desc_lookup(desc), desc, time, data1, data2, line);
IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
ilink1, ilink2);
iwl_release_nic_access(priv);
}
#define EVENT_START_OFFSET (4 * sizeof(u32))
/**
* iwl4965_print_event_log - Dump error event log to syslog
*
* NOTE: Must be called with iwl_grab_nic_access() already obtained!
*/
static void iwl4965_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_targ_mem(priv, ptr);
ptr += sizeof(u32);
time = iwl_read_targ_mem(priv, ptr);
ptr += sizeof(u32);
if (mode == 0)
IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
else {
data = iwl_read_targ_mem(priv, ptr);
ptr += sizeof(u32);
IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
}
}
}
static void iwl4965_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 (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
return;
}
rc = iwl_grab_nic_access(priv);
if (rc) {
IWL_WARNING("Can not read from adapter at this time.\n");
return;
}
/* event log header */
capacity = iwl_read_targ_mem(priv, base);
mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
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_nic_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)
iwl4965_print_event_log(priv, next_entry,
capacity - next_entry, mode);
/* (then/else) start at top of log */
iwl4965_print_event_log(priv, 0, next_entry, mode);
iwl_release_nic_access(priv);
}
/**
* iwl4965_irq_handle_error - called for HW or SW error interrupt from card
*/
static void iwl4965_irq_handle_error(struct iwl_priv *priv)
{
/* Set the FW error flag -- cleared on iwl4965_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) {
iwl4965_dump_nic_error_log(priv);
iwl4965_dump_nic_event_log(priv);
iwl4965_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 iwl4965_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;
iwl4965_commit_rxon(priv);
iwl4965_rxon_add_station(priv, priv->bssid, 1);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
priv->error_recovering = 0;
spin_unlock_irqrestore(&priv->lock, flags);
}
static void iwl4965_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) {
/* just for debug */
inta_mask = iwl_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
}
#endif
/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
* atomic, make sure that inta covers all the interrupts that
* we've discovered, even if FH interrupt came in just after
* reading CSR_INT. */
if (inta_fh & CSR49_FH_INT_RX_MASK)
inta |= CSR_INT_BIT_FH_RX;
if (inta_fh & CSR49_FH_INT_TX_MASK)
inta |= CSR_INT_BIT_FH_TX;
/* Now service all interrupt bits discovered above. */
if (inta & CSR_INT_BIT_HW_ERR) {
IWL_ERROR("Microcode HW error detected. Restarting.\n");
/* Tell the device to stop sending interrupts */
iwl4965_disable_interrupts(priv);
iwl4965_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_SCD)
IWL_DEBUG_ISR("Scheduler finished to transmit "
"the frame/frames.\n");
/* Alive notification via Rx interrupt will do the real work */
if (inta & CSR_INT_BIT_ALIVE)
IWL_DEBUG_ISR("Alive interrupt\n");
}
#endif
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
/* HW RF KILL switch toggled */
if (inta & CSR_INT_BIT_RF_KILL) {
int hw_rf_kill = 0;
if (!(iwl_read32(priv, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
hw_rf_kill = 1;
IWL_DEBUG(IWL_DL_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
* iwl4965_rx_card_state_notif() */
if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
clear_bit(STATUS_RF_KILL_HW, &priv->status);
queue_work(priv->workqueue, &priv->restart);
}
handled |= CSR_INT_BIT_RF_KILL;
}
/* Chip got too hot and stopped itself */
if (inta & CSR_INT_BIT_CT_KILL) {
IWL_ERROR("Microcode CT kill error detected.\n");
handled |= CSR_INT_BIT_CT_KILL;
}
/* Error detected by uCode */
if (inta & CSR_INT_BIT_SW_ERR) {
IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
inta);
iwl4965_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");
iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
iwl4965_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)) {
iwl4965_rx_handle(priv);
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
}
if (inta & CSR_INT_BIT_FH_TX) {
IWL_DEBUG_ISR("Tx interrupt\n");
handled |= CSR_INT_BIT_FH_TX;
}
if (inta & ~handled)
IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
if (inta & ~CSR_INI_SET_MASK) {
IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
inta & ~CSR_INI_SET_MASK);
IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
}
/* Re-enable all interrupts */
/* only Re-enable if diabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl4965_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 iwl4965_isr(int irq, void *data)
{
struct iwl_priv *priv = data;
u32 inta, inta_mask;
u32 inta_fh;
if (!priv)
return IRQ_NONE;
spin_lock(&priv->lock);
/* Disable (but don't clear!) interrupts here to avoid
* back-to-back ISRs and sporadic interrupts from our NIC.
* If we have something to service, the tasklet will re-enable ints.
* If we *don't* have something, we'll re-enable before leaving here. */
inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
iwl_write32(priv, CSR_INT_MASK, 0x00000000);
/* Discover which interrupts are active/pending */
inta = iwl_read32(priv, CSR_INT);
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
/* Ignore interrupt if there's nothing in NIC to service.
* This may be due to IRQ shared with another device,
* or due to sporadic interrupts thrown from our NIC. */
if (!inta && !inta_fh) {
IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
goto none;
}
if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
/* Hardware disappeared. It might have already raised
* an interrupt */
IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
goto unplugged;
}
IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
inta &= ~CSR_INT_BIT_SCD;
/* iwl4965_irq_tasklet() will service interrupts and re-enable them */
if (likely(inta || inta_fh))
tasklet_schedule(&priv->irq_tasklet);
unplugged:
spin_unlock(&priv->lock);
return IRQ_HANDLED;
none:
/* re-enable interrupts here since we don't have anything to service. */
/* only Re-enable if diabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl4965_enable_interrupts(priv);
spin_unlock(&priv->lock);
return IRQ_NONE;
}
/* 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 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band)
{
if (band == IEEE80211_BAND_5GHZ)
return IWL_ACTIVE_DWELL_TIME_52;
else
return IWL_ACTIVE_DWELL_TIME_24;
}
static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band)
{
u16 active = iwl4965_get_active_dwell_time(priv, band);
u16 passive = (band != IEEE80211_BAND_5GHZ) ?
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 iwl4965_get_channels_for_scan(struct iwl_priv *priv,
enum ieee80211_band band,
u8 is_active, u8 direct_mask,
struct iwl4965_scan_channel *scan_ch)
{
const struct ieee80211_channel *channels = NULL;
const struct ieee80211_supported_band *sband;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
sband = iwl4965_get_hw_mode(priv, band);
if (!sband)
return 0;
channels = sband->channels;
active_dwell = iwl4965_get_active_dwell_time(priv, band);
passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
for (i = 0, added = 0; i < sband->n_channels; i++) {
if (channels[i].flags & IEEE80211_CHAN_DISABLED)
continue;
scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
ch_info = iwl_get_channel_info(priv, band,
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].flags & IEEE80211_CHAN_PASSIVE_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 txpower levels to defaults */
scan_ch->tpc.dsp_atten = 110;
/* scan_pwr_info->tpc.dsp_atten; */
/*scan_pwr_info->tpc.tx_gain; */
if (band == IEEE80211_BAND_5GHZ)
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 iwl4965_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT; i++) {
rates[i].bitrate = iwl4965_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on indexes */
rates[i].hw_value_short = i;
rates[i].flags = 0;
if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |=
(iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
/**
* iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
*/
int iwl4965_init_geos(struct iwl_priv *priv)
{
struct iwl_channel_info *ch;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *channels;
struct ieee80211_channel *geo_ch;
struct ieee80211_rate *rates;
int i = 0;
if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
IWL_DEBUG_INFO("Geography modes already initialized.\n");
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
channels = kzalloc(sizeof(struct ieee80211_channel) *
priv->channel_count, GFP_KERNEL);
if (!channels)
return -ENOMEM;
rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
GFP_KERNEL);
if (!rates) {
kfree(channels);
return -ENOMEM;
}
/* 5.2GHz channels start after the 2.4GHz channels */
sband = &priv->bands[IEEE80211_BAND_5GHZ];
sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
/* just OFDM */
sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
sband = &priv->bands[IEEE80211_BAND_2GHZ];
sband->channels = channels;
/* OFDM & CCK */
sband->bitrates = rates;
sband->n_bitrates = IWL_RATE_COUNT;
iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
priv->ieee_channels = channels;
priv->ieee_rates = rates;
iwl4965_init_hw_rates(priv, rates);
for (i = 0; i < priv->channel_count; i++) {
ch = &priv->channel_info[i];
/* FIXME: might be removed if scan is OK */
if (!is_channel_valid(ch))
continue;
if (is_channel_a_band(ch))
sband = &priv->bands[IEEE80211_BAND_5GHZ];
else
sband = &priv->bands[IEEE80211_BAND_2GHZ];
geo_ch = &sband->channels[sband->n_channels++];
geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
geo_ch->max_power = ch->max_power_avg;
geo_ch->max_antenna_gain = 0xff;
geo_ch->hw_value = ch->channel;
if (is_channel_valid(ch)) {
if (!(ch->flags & EEPROM_CHANNEL_IBSS))
geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
if (ch->flags & EEPROM_CHANNEL_RADAR)
geo_ch->flags |= IEEE80211_CHAN_RADAR;
if (ch->max_power_avg > priv->max_channel_txpower_limit)
priv->max_channel_txpower_limit =
ch->max_power_avg;
} else {
geo_ch->flags |= IEEE80211_CHAN_DISABLED;
}
/* Save flags for reg domain usage */
geo_ch->orig_flags = geo_ch->flags;
IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
ch->channel, geo_ch->center_freq,
is_channel_a_band(ch) ? "5.2" : "2.4",
geo_ch->flags & IEEE80211_CHAN_DISABLED ?
"restricted" : "valid",
geo_ch->flags);
}
if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
priv->cfg->sku & IWL_SKU_A) {
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->cfg->sku &= ~IWL_SKU_A;
}
printk(KERN_INFO DRV_NAME
": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
priv->bands[IEEE80211_BAND_2GHZ].n_channels,
priv->bands[IEEE80211_BAND_5GHZ].n_channels);
if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&priv->bands[IEEE80211_BAND_2GHZ];
if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&priv->bands[IEEE80211_BAND_5GHZ];
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
/*
* iwl4965_free_geos - undo allocations in iwl4965_init_geos
*/
void iwl4965_free_geos(struct iwl_priv *priv)
{
kfree(priv->ieee_channels);
kfree(priv->ieee_rates);
clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
{
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
}
/**
* iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
static int iwl4965_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_nic_access(priv);
if (rc)
return rc;
iwl_write_direct32(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_direct32(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_nic_access(priv);
if (!errcnt)
IWL_DEBUG_INFO
("ucode image in INSTRUCTION memory is good\n");
return rc;
}
/**
* iwl4965_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 iwl4965_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_nic_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_direct32(priv, HBUS_TARG_MEM_RADDR,
i + RTC_INST_LOWER_BOUND);
val = _iwl_read_direct32(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_nic_access(priv);
return rc;
}
/**
* iwl4965_verify_ucode - determine which instruction image is in SRAM,
* and verify its contents
*/
static int iwl4965_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 = iwl4965_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 = iwl4965_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 = iwl4965_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");
/* Since nothing seems to match, show first several data entries in
* instruction SRAM, so maybe visual inspection will give a clue.
* Selection of bootstrap image (vs. other images) is arbitrary. */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
rc = iwl4965_verify_inst_full(priv, image, len);
return rc;
}
static void iwl4965_nic_start(struct iwl_priv *priv)
{
/* Remove all resets to allow NIC to operate */
iwl_write32(priv, CSR_RESET, 0);
}
/**
* iwl4965_read_ucode - Read uCode images from disk file.
*
* Copy into buffers for card to fetch via bus-mastering
*/
static int iwl4965_read_ucode(struct iwl_priv *priv)
{
struct iwl4965_ucode *ucode;
int ret;
const struct firmware *ucode_raw;
const char *name = priv->cfg->fw_name;
u8 *src;
size_t len;
u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
/* Ask kernel firmware_class module to get the boot firmware off disk.
* request_firmware() is synchronous, file is in memory on return. */
ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
if (ret < 0) {
IWL_ERROR("%s firmware file req failed: Reason %d\n",
name, ret);
goto error;
}
IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
name, ucode_raw->size);
/* Make sure that we got at least our header! */
if (ucode_raw->size < sizeof(*ucode)) {
IWL_ERROR("File size way too small!\n");
ret = -EINVAL;
goto err_release;
}
/* Data from ucode file: header followed by uCode images */
ucode = (void *)ucode_raw->data;
ver = le32_to_cpu(ucode->ver);
inst_size = le32_to_cpu(ucode->inst_size);
data_size = le32_to_cpu(ucode->data_size);
init_size = le32_to_cpu(ucode->init_size);
init_data_size = le32_to_cpu(ucode->init_data_size);
boot_size = le32_to_cpu(ucode->boot_size);
IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
inst_size);
IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
data_size);
IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
init_size);
IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
init_data_size);
IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
boot_size);
/* Verify size of file vs. image size info in file's header */
if (ucode_raw->size < sizeof(*ucode) +
inst_size + data_size + init_size +
init_data_size + boot_size) {
IWL_DEBUG_INFO("uCode file size %d too small\n",
(int)ucode_raw->size);
ret = -EINVAL;
goto err_release;
}
/* Verify that uCode images will fit in card's SRAM */
if (inst_size > IWL_MAX_INST_SIZE) {
IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
inst_size);
ret = -EINVAL;
goto err_release;
}
if (data_size > IWL_MAX_DATA_SIZE) {
IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
data_size);
ret = -EINVAL;
goto err_release;
}
if (init_size > IWL_MAX_INST_SIZE) {
IWL_DEBUG_INFO
("uCode init instr len %d too large to fit in\n",
init_size);
ret = -EINVAL;
goto err_release;
}
if (init_data_size > IWL_MAX_DATA_SIZE) {
IWL_DEBUG_INFO
("uCode init data len %d too large to fit in\n",
init_data_size);
ret = -EINVAL;
goto err_release;
}
if (boot_size > IWL_MAX_BSM_SIZE) {
IWL_DEBUG_INFO
("uCode boot instr len %d too large to fit in\n",
boot_size);
ret = -EINVAL;
goto err_release;
}
/* Allocate ucode buffers for card's bus-master loading ... */
/* Runtime instructions and 2 copies of data:
* 1) unmodified from disk
* 2) backup cache for save/restore during power-downs */
priv->ucode_code.len = inst_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
priv->ucode_data.len = data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
priv->ucode_data_backup.len = data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
/* Initialization instructions and data */
if (init_size && init_data_size) {
priv->ucode_init.len = init_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
priv->ucode_init_data.len = init_data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
goto err_pci_alloc;
}
/* Bootstrap (instructions only, no data) */
if (boot_size) {
priv->ucode_boot.len = boot_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
if (!priv->ucode_boot.v_addr)
goto err_pci_alloc;
}
/* Copy images into buffers for card's bus-master reads ... */
/* Runtime instructions (first block of data in file) */
src = &ucode->data[0];
len = priv->ucode_code.len;
IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
memcpy(priv->ucode_code.v_addr, src, len);
IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
/* Runtime data (2nd block)
* NOTE: Copy into backup buffer will be done in iwl4965_up() */
src = &ucode->data[inst_size];
len = priv->ucode_data.len;
IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
memcpy(priv->ucode_data.v_addr, src, len);
memcpy(priv->ucode_data_backup.v_addr, src, len);
/* Initialization instructions (3rd block) */
if (init_size) {
src = &ucode->data[inst_size + data_size];
len = priv->ucode_init.len;
IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
len);
memcpy(priv->ucode_init.v_addr, src, len);
}
/* Initialization data (4th block) */
if (init_data_size) {
src = &ucode->data[inst_size + data_size + init_size];
len = priv->ucode_init_data.len;
IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
len);
memcpy(priv->ucode_init_data.v_addr, src, len);
}
/* Bootstrap instructions (5th block) */
src = &ucode->data[inst_size + data_size + init_size + init_data_size];
len = priv->ucode_boot.len;
IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
memcpy(priv->ucode_boot.v_addr, src, len);
/* We have our copies now, allow OS release its copies */
release_firmware(ucode_raw);
return 0;
err_pci_alloc:
IWL_ERROR("failed to allocate pci memory\n");
ret = -ENOMEM;
iwl4965_dealloc_ucode_pci(priv);
err_release:
release_firmware(ucode_raw);
error:
return ret;
}
/**
* iwl4965_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 iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
{
dma_addr_t pinst;
dma_addr_t pdata;
int rc = 0;
unsigned long flags;
/* bits 35:4 for 4965 */
pinst = priv->ucode_code.p_addr >> 4;
pdata = priv->ucode_data_backup.p_addr >> 4;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* Tell bootstrap uCode where to find image to load */
iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
iwl_write_prph(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_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
priv->ucode_code.len | BSM_DRAM_INST_LOAD);
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
return rc;
}
/**
* iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
*
* 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 iwl4965_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 (iwl4965_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;
}
/* Calculate temperature */
priv->temperature = iwl4965_get_temperature(priv);
/* 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 (iwl4965_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);
}
/**
* iwl4965_alive_start - called after REPLY_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by iwl4965_init_alive_start()).
*/
static void iwl4965_alive_start(struct iwl_priv *priv)
{
int ret = 0;
IWL_DEBUG_INFO("Runtime Alive received.\n");
if (priv->card_alive.is_valid != UCODE_VALID_OK) {
/* We had an error bringing up the hardware, so take it
* all the way back down so we can try again */
IWL_DEBUG_INFO("Alive failed.\n");
goto restart;
}
/* Initialize uCode has loaded Runtime uCode ... verify inst image.
* This is a paranoid check, because we would not have gotten the
* "runtime" alive if code weren't properly loaded. */
if (iwl4965_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;
}
iwlcore_clear_stations_table(priv);
ret = priv->cfg->ops->lib->alive_notify(priv);
if (ret) {
IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
ret);
goto restart;
}
/* After the ALIVE response, we can send host commands to 4965 uCode */
set_bit(STATUS_ALIVE, &priv->status);
/* Clear out the uCode error bit if it is set */
clear_bit(STATUS_FW_ERROR, &priv->status);
if (iwl_is_rfkill(priv))
return;
ieee80211_start_queues(priv->hw);
priv->active_rate = priv->rates_mask;
priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
if (iwl_is_associated(priv)) {
struct iwl4965_rxon_cmd *active_rxon =
(struct iwl4965_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 */
iwl4965_connection_init_rx_config(priv);
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
}
/* Configure Bluetooth device coexistence support */
iwl4965_send_bt_config(priv);
/* Configure the adapter for unassociated operation */
iwl4965_commit_rxon(priv);
/* At this point, the NIC is initialized and operational */
priv->notif_missed_beacons = 0;
iwl4965_rf_kill_ct_config(priv);
iwl_leds_register(priv);
IWL_DEBUG_INFO("ALIVE processing complete.\n");
set_bit(STATUS_READY, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
if (priv->error_recovering)
iwl4965_error_recovery(priv);
iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
return;
restart:
queue_work(priv->workqueue, &priv->restart);
}
static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
static void __iwl4965_down(struct iwl_priv *priv)
{
unsigned long flags;
int exit_pending = 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_leds_unregister(priv);
iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
iwlcore_clear_stations_table(priv);
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
clear_bit(STATUS_EXIT_PENDING, &priv->status);
/* stop and reset the on-board processor */
iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
/* tell the device to stop sending interrupts */
spin_lock_irqsave(&priv->lock, flags);
iwl4965_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
/* If we have not previously called iwl4965_init() then
* clear all bits but the RF Kill and SUSPEND bits and return */
if (!iwl_is_init(priv)) {
priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_RF_KILL_SW, &priv->status) <<
STATUS_RF_KILL_SW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND;
goto exit;
}
/* ...otherwise clear out all the status bits but the RF Kill and
* SUSPEND bits and continue taking the NIC down. */
priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_RF_KILL_SW, &priv->status) <<
STATUS_RF_KILL_SW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_IN_SUSPEND, &priv->status) <<
STATUS_IN_SUSPEND |
test_bit(STATUS_FW_ERROR, &priv->status) <<
STATUS_FW_ERROR;
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);
iwl4965_hw_txq_ctx_stop(priv);
iwl4965_hw_rxq_stop(priv);
spin_lock_irqsave(&priv->lock, flags);
if (!iwl_grab_nic_access(priv)) {
iwl_write_prph(priv, APMG_CLK_DIS_REG,
APMG_CLK_VAL_DMA_CLK_RQT);
iwl_release_nic_access(priv);
}
spin_unlock_irqrestore(&priv->lock, flags);
udelay(5);
iwl4965_hw_nic_stop_master(priv);
iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
iwl4965_hw_nic_reset(priv);
exit:
memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
/* clear out any free frames */
iwl4965_clear_free_frames(priv);
}
static void iwl4965_down(struct iwl_priv *priv)
{
mutex_lock(&priv->mutex);
__iwl4965_down(priv);
mutex_unlock(&priv->mutex);
iwl4965_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
static int __iwl4965_up(struct iwl_priv *priv)
{
int i;
int ret;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARNING("Exit pending; will not bring the NIC up\n");
return -EIO;
}
if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
IWL_WARNING("Radio disabled by SW RF kill (module "
"parameter)\n");
iwl_rfkill_set_hw_state(priv);
return -ENODEV;
}
if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
IWL_ERROR("ucode not available for device bringup\n");
return -EIO;
}
/* If platform's RF_KILL switch is NOT set to KILL */
if (iwl_read32(priv, CSR_GP_CNTRL) &
CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(STATUS_RF_KILL_HW, &priv->status);
else {
set_bit(STATUS_RF_KILL_HW, &priv->status);
if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
iwl_rfkill_set_hw_state(priv);
IWL_WARNING("Radio disabled by HW RF Kill switch\n");
return -ENODEV;
}
}
iwl_rfkill_set_hw_state(priv);
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
ret = priv->cfg->ops->lib->hw_nic_init(priv);
if (ret) {
IWL_ERROR("Unable to init nic\n");
return ret;
}
/* make sure rfkill handshake bits are cleared */
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
/* clear (again), then enable host interrupts */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
iwl4965_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);
/* We return success when we resume from suspend and rf_kill is on. */
if (test_bit(STATUS_RF_KILL_HW, &priv->status))
return 0;
for (i = 0; i < MAX_HW_RESTARTS; i++) {
iwlcore_clear_stations_table(priv);
/* load bootstrap state machine,
* load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */
ret = priv->cfg->ops->lib->load_ucode(priv);
if (ret) {
IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
continue;
}
/* start card; "initialize" will load runtime ucode */
iwl4965_nic_start(priv);
IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
return 0;
}
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl4965_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 iwl4965_bg_init_alive_start(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, init_alive_start.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl4965_init_alive_start(priv);
mutex_unlock(&priv->mutex);
}
static void iwl4965_bg_alive_start(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, alive_start.work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl4965_alive_start(priv);
mutex_unlock(&priv->mutex);
}
static void iwl4965_bg_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 {
/* make sure mac80211 stop sending Tx frame */
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
IWL_DEBUG_RF_KILL("Can not turn radio back on - "
"disabled by SW switch\n");
else
IWL_WARNING("Radio Frequency Kill Switch is On:\n"
"Kill switch must be turned off for "
"wireless networking to work.\n");
}
iwl_rfkill_set_hw_state(priv);
mutex_unlock(&priv->mutex);
}
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
static void iwl4965_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))
iwl4965_send_scan_abort(priv);
}
mutex_unlock(&priv->mutex);
}
static void iwl4965_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 iwl4965_scan_cmd),
.meta.flags = CMD_SIZE_HUGE,
};
struct iwl4965_scan_cmd *scan;
struct ieee80211_conf *conf = NULL;
u16 cmd_len;
enum ieee80211_band band;
u8 direct_mask;
int ret = 0;
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");
ret = -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 iwl4965_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan) {
ret = -ENOMEM;
goto done;
}
}
scan = priv->scan;
memset(scan, 0, sizeof(struct iwl4965_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;
extra = (suspend_time / interval) << 22;
scan_suspend_time = (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",
iwl4965_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) {
IWL_DEBUG_SCAN
("Kicking off one direct scan for '%s' when not associated\n",
iwl4965_escape_essid(priv->essid, 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 {
IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
direct_mask = 0;
}
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
switch (priv->scan_bands) {
case 2:
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
scan->tx_cmd.rate_n_flags =
iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
scan->good_CRC_th = 0;
band = IEEE80211_BAND_2GHZ;
break;
case 1:
scan->tx_cmd.rate_n_flags =
iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
RATE_MCS_ANT_B_MSK);
scan->good_CRC_th = IWL_GOOD_CRC_TH;
band = IEEE80211_BAND_5GHZ;
break;
default:
IWL_WARNING("Invalid scan band count\n");
goto done;
}
/* We don't build a direct scan probe request; the uCode will do
* that based on the direct_mask added to each channel entry */
cmd_len = iwl4965_fill_probe_req(priv, band,
(struct ieee80211_mgmt *)scan->data,
IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
scan->tx_cmd.len = cpu_to_le16(cmd_len);
/* select Rx chains */
/* Force use of chains B and C (0x6) for scan Rx.
* Avoid A (0x1) because of its off-channel reception on A-band.
* MIMO is not used here, but value is required to make uCode happy. */
scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
(0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
(0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
if (direct_mask)
scan->channel_count =
iwl4965_get_channels_for_scan(
priv, band, 1, /* active */
direct_mask,
(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
else
scan->channel_count =
iwl4965_get_channels_for_scan(
priv, band, 0, /* passive */
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 iwl4965_scan_channel);
cmd.data = scan;
scan->len = cpu_to_le16(cmd.len);
set_bit(STATUS_SCAN_HW, &priv->status);
ret = iwl_send_cmd_sync(priv, &cmd);
if (ret)
goto done;
queue_delayed_work(priv->workqueue, &priv->scan_check,
IWL_SCAN_CHECK_WATCHDOG);
mutex_unlock(&priv->mutex);
return;
done:
/* inform mac80211 scan aborted */
queue_work(priv->workqueue, &priv->scan_completed);
mutex_unlock(&priv->mutex);
}
static void iwl4965_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);
__iwl4965_up(priv);
mutex_unlock(&priv->mutex);
}
static void iwl4965_bg_restart(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
iwl4965_down(priv);
queue_work(priv->workqueue, &priv->up);
}
static void iwl4965_bg_rx_replenish(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, rx_replenish);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl4965_rx_replenish(priv);
mutex_unlock(&priv->mutex);
}
#define IWL_DELAY_NEXT_SCAN (HZ*2)
static void iwl4965_post_associate(struct iwl_priv *priv)
{
struct ieee80211_conf *conf = NULL;
int ret = 0;
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;
if (!priv->vif || !priv->is_open)
return;
iwl4965_scan_cancel_timeout(priv, 200);
conf = ieee80211_get_hw_conf(priv->hw);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl4965_commit_rxon(priv);
memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
iwl4965_setup_rxon_timing(priv);
ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (ret)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
#ifdef CONFIG_IWL4965_HT
if (priv->current_ht_config.is_ht)
iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
#endif /* CONFIG_IWL4965_HT*/
iwl4965_set_rxon_chain(priv);
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
priv->assoc_id, priv->beacon_int);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
}
iwl4965_commit_rxon(priv);
switch (priv->iw_mode) {
case IEEE80211_IF_TYPE_STA:
iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
break;
case IEEE80211_IF_TYPE_IBSS:
/* clear out the station table */
iwlcore_clear_stations_table(priv);
iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
iwl4965_rxon_add_station(priv, priv->bssid, 0);
iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
iwl4965_send_beacon_cmd(priv);
break;
default:
IWL_ERROR("%s Should not be called in %d mode\n",
__FUNCTION__, priv->iw_mode);
break;
}
iwl4965_sequence_reset(priv);
#ifdef CONFIG_IWL4965_SENSITIVITY
/* Enable Rx differential gain and sensitivity calibrations */
iwl4965_chain_noise_reset(priv);
priv->start_calib = 1;
#endif /* CONFIG_IWL4965_SENSITIVITY */
if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
priv->assoc_station_added = 1;
iwl4965_activate_qos(priv, 0);
/* we have just associated, don't start scan too early */
priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
}
static void iwl4965_bg_post_associate(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv,
post_associate.work);
mutex_lock(&priv->mutex);
iwl4965_post_associate(priv);
mutex_unlock(&priv->mutex);
}
static void iwl4965_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);
iwl4965_send_scan_abort(priv);
mutex_unlock(&priv->mutex);
}
static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
static void iwl4965_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;
if (test_bit(STATUS_CONF_PENDING, &priv->status))
iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
ieee80211_scan_completed(priv->hw);
/* Since setting the TXPOWER may have been deferred while
* performing the scan, fire one off */
mutex_lock(&priv->mutex);
iwl4965_hw_reg_send_txpower(priv);
mutex_unlock(&priv->mutex);
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
#define UCODE_READY_TIMEOUT (2 * HZ)
static int iwl4965_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211("enter\n");
if (pci_enable_device(priv->pci_dev)) {
IWL_ERROR("Fail to pci_enable_device\n");
return -ENODEV;
}
pci_restore_state(priv->pci_dev);
pci_enable_msi(priv->pci_dev);
ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
DRV_NAME, priv);
if (ret) {
IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
goto out_disable_msi;
}
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
/* fetch ucode file from disk, alloc and copy to bus-master buffers ...
* ucode filename and max sizes are card-specific. */
if (!priv->ucode_code.len) {
ret = iwl4965_read_ucode(priv);
if (ret) {
IWL_ERROR("Could not read microcode: %d\n", ret);
mutex_unlock(&priv->mutex);
goto out_release_irq;
}
}
ret = __iwl4965_up(priv);
mutex_unlock(&priv->mutex);
if (ret)
goto out_release_irq;
IWL_DEBUG_INFO("Start UP work done.\n");
if (test_bit(STATUS_IN_SUSPEND, &priv->status))
return 0;
/* Wait for START_ALIVE from ucode. Otherwise callbacks from
* mac80211 will not be run successfully. */
ret = wait_event_interruptible_timeout(priv->wait_command_queue,
test_bit(STATUS_READY, &priv->status),
UCODE_READY_TIMEOUT);
if (!ret) {
if (!test_bit(STATUS_READY, &priv->status)) {
IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
jiffies_to_msecs(UCODE_READY_TIMEOUT));
ret = -ETIMEDOUT;
goto out_release_irq;
}
}
priv->is_open = 1;
IWL_DEBUG_MAC80211("leave\n");
return 0;
out_release_irq:
free_irq(priv->pci_dev->irq, priv);
out_disable_msi:
pci_disable_msi(priv->pci_dev);
pci_disable_device(priv->pci_dev);
priv->is_open = 0;
IWL_DEBUG_MAC80211("leave - failed\n");
return ret;
}
static void iwl4965_mac_stop(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
if (!priv->is_open) {
IWL_DEBUG_MAC80211("leave - skip\n");
return;
}
priv->is_open = 0;
if (iwl_is_ready_rf(priv)) {
/* stop mac, cancel any scan request and clear
* RXON_FILTER_ASSOC_MSK BIT
*/
mutex_lock(&priv->mutex);
iwl4965_scan_cancel_timeout(priv, 100);
cancel_delayed_work(&priv->post_associate);
mutex_unlock(&priv->mutex);
}
iwl4965_down(priv);
flush_workqueue(priv->workqueue);
free_irq(priv->pci_dev->irq, priv);
pci_disable_msi(priv->pci_dev);
pci_save_state(priv->pci_dev);
pci_disable_device(priv->pci_dev);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl4965_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->bitrate);
if (iwl4965_tx_skb(priv, skb, ctl))
dev_kfree_skb_any(skb);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static int iwl4965_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: type %d\n", conf->type);
if (priv->vif) {
IWL_DEBUG_MAC80211("leave - vif != NULL\n");
return -EOPNOTSUPP;
}
spin_lock_irqsave(&priv->lock, flags);
priv->vif = conf->vif;
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);
}
if (iwl_is_ready(priv))
iwl4965_set_mode(priv, conf->type);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
/**
* iwl4965_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 iwl4965_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;
int ret = 0;
mutex_lock(&priv->mutex);
IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
if (!iwl_is_ready(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
ret = -EIO;
goto out;
}
if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
test_bit(STATUS_SCANNING, &priv->status))) {
IWL_DEBUG_MAC80211("leave - scanning\n");
set_bit(STATUS_CONF_PENDING, &priv->status);
mutex_unlock(&priv->mutex);
return 0;
}
spin_lock_irqsave(&priv->lock, flags);
ch_info = iwl_get_channel_info(priv, conf->channel->band,
ieee80211_frequency_to_channel(conf->channel->center_freq));
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_MAC80211("leave - invalid channel\n");
spin_unlock_irqrestore(&priv->lock, flags);
ret = -EINVAL;
goto out;
}
#ifdef CONFIG_IWL4965_HT
/* if we are switching from ht to 2.4 clear flags
* from any ht related info since 2.4 does not
* support ht */
if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
#ifdef IEEE80211_CONF_CHANNEL_SWITCH
&& !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
#endif
)
priv->staging_rxon.flags = 0;
#endif /* CONFIG_IWL4965_HT */
iwlcore_set_rxon_channel(priv, conf->channel->band,
ieee80211_frequency_to_channel(conf->channel->center_freq));
iwl4965_set_flags_for_phymode(priv, conf->channel->band);
/* The list of supported rates and rate mask can be different
* for each band; since the band may have changed, reset
* the rate mask to what mac80211 lists */
iwl4965_set_rate(priv);
spin_unlock_irqrestore(&priv->lock, flags);
#ifdef IEEE80211_CONF_CHANNEL_SWITCH
if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
iwl4965_hw_channel_switch(priv, conf->channel);
goto out;
}
#endif
if (priv->cfg->ops->lib->radio_kill_sw)
priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
if (!conf->radio_enabled) {
IWL_DEBUG_MAC80211("leave - radio disabled\n");
goto out;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_MAC80211("leave - RF kill\n");
ret = -EIO;
goto out;
}
iwl4965_set_rate(priv);
if (memcmp(&priv->active_rxon,
&priv->staging_rxon, sizeof(priv->staging_rxon)))
iwl4965_commit_rxon(priv);
else
IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
IWL_DEBUG_MAC80211("leave\n");
out:
clear_bit(STATUS_CONF_PENDING, &priv->status);
mutex_unlock(&priv->mutex);
return ret;
}
static void iwl4965_config_ap(struct iwl_priv *priv)
{
int ret = 0;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
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;
iwl4965_commit_rxon(priv);
/* RXON Timing */
memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
iwl4965_setup_rxon_timing(priv);
ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (ret)
IWL_WARNING("REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
iwl4965_set_rxon_chain(priv);
/* FIXME: what should be the assoc_id for AP? */
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability &
WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == 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;
iwl4965_commit_rxon(priv);
iwl4965_activate_qos(priv, 1);
iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
}
iwl4965_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 iwl4965_mac_config_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
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;
if (priv->vif != vif) {
IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
return 0;
}
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;
}
if (!iwl_is_alive(priv))
return -EAGAIN;
mutex_lock(&priv->mutex);
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 (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 (iwl_is_rfkill(priv))
goto done;
if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
!is_multicast_ether_addr(conf->bssid)) {
/* If there is currently a HW scan going on in the background
* then we need to cancel it else the RXON below will fail. */
if (iwl4965_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)
iwl4965_config_ap(priv);
else {
rc = iwl4965_commit_rxon(priv);
if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
iwl4965_rxon_add_station(
priv, priv->active_rxon.bssid_addr, 1);
}
} else {
iwl4965_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl4965_commit_rxon(priv);
}
done:
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 iwl4965_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 iwl4965_connection_init_rx_config
*/
*total_flags = 0;
}
static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("enter\n");
mutex_lock(&priv->mutex);
if (iwl_is_ready_rf(priv)) {
iwl4965_scan_cancel_timeout(priv, 100);
cancel_delayed_work(&priv->post_associate);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl4965_commit_rxon(priv);
}
if (priv->vif == conf->vif) {
priv->vif = NULL;
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");
}
#ifdef CONFIG_IWL4965_HT
static void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
IWL_DEBUG_MAC80211("enter: \n");
iwl_conf->is_ht = bss_conf->assoc_ht;
if (!iwl_conf->is_ht)
return;
priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
iwl_conf->sgf |= 0x1;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
iwl_conf->sgf |= 0x2;
iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
iwl_conf->max_amsdu_size =
!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
iwl_conf->supported_chan_width =
!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
iwl_conf->extension_chan_offset =
ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
/* If no above or below channel supplied disable FAT channel */
if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
iwl_conf->supported_chan_width = 0;
iwl_conf->tx_mimo_ps_mode =
(u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
iwl_conf->control_channel = ht_bss_conf->primary_channel;
iwl_conf->tx_chan_width =
!!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
iwl_conf->ht_protection =
ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
iwl_conf->non_GF_STA_present =
!!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
IWL_DEBUG_MAC80211("leave\n");
}
#else
static inline void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
}
#endif
#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
if (changes & BSS_CHANGED_ERP_PREAMBLE) {
IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
bss_conf->use_short_preamble);
if (bss_conf->use_short_preamble)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
}
if (changes & BSS_CHANGED_ERP_CTS_PROT) {
IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
}
if (changes & BSS_CHANGED_HT) {
IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
iwl4965_ht_conf(priv, bss_conf);
iwl4965_set_rxon_chain(priv);
}
if (changes & BSS_CHANGED_ASSOC) {
IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
/* This should never happen as this function should
* never be called from interrupt context. */
if (WARN_ON_ONCE(in_interrupt()))
return;
if (bss_conf->assoc) {
priv->assoc_id = bss_conf->aid;
priv->beacon_int = bss_conf->beacon_int;
priv->timestamp = bss_conf->timestamp;
priv->assoc_capability = bss_conf->assoc_capability;
priv->next_scan_jiffies = jiffies +
IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
mutex_lock(&priv->mutex);
iwl4965_post_associate(priv);
mutex_unlock(&priv->mutex);
} else {
priv->assoc_id = 0;
IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
}
} else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
iwl_send_rxon_assoc(priv);
}
}
static int iwl4965_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;
}
/* we don't schedule scan within next_scan_jiffies period */
if (priv->next_scan_jiffies &&
time_after(priv->next_scan_jiffies, jiffies)) {
rc = -EAGAIN;
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 ",
iwl4965_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 = iwl4965_scan_initiate(priv);
IWL_DEBUG_MAC80211("leave\n");
out_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
mutex_unlock(&priv->mutex);
return rc;
}
static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
struct ieee80211_key_conf *keyconf, const u8 *addr,
u32 iv32, u16 *phase1key)
{
struct iwl_priv *priv = hw->priv;
u8 sta_id = IWL_INVALID_STATION;
unsigned long flags;
__le16 key_flags = 0;
int i;
DECLARE_MAC_BUF(mac);
IWL_DEBUG_MAC80211("enter\n");
sta_id = iwl4965_hw_find_station(priv, addr);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
print_mac(mac, addr));
return;
}
iwl4965_scan_cancel_timeout(priv, 100);
key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
for (i = 0; i < 5; i++)
priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
cpu_to_le16(phase1key[i]);
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl4965_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;
DECLARE_MAC_BUF(mac);
int ret = 0;
u8 sta_id = IWL_INVALID_STATION;
u8 is_default_wep_key = 0;
IWL_DEBUG_MAC80211("enter\n");
if (priv->cfg->mod_params->sw_crypto) {
IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
if (is_zero_ether_addr(addr))
/* only support pairwise keys */
return -EOPNOTSUPP;
sta_id = iwl4965_hw_find_station(priv, addr);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
print_mac(mac, addr));
return -EINVAL;
}
mutex_lock(&priv->mutex);
iwl4965_scan_cancel_timeout(priv, 100);
mutex_unlock(&priv->mutex);
/* If we are getting WEP group key and we didn't receive any key mapping
* so far, we are in legacy wep mode (group key only), otherwise we are
* in 1X mode.
* In legacy wep mode, we use another host command to the uCode */
if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
priv->iw_mode != IEEE80211_IF_TYPE_AP) {
if (cmd == SET_KEY)
is_default_wep_key = !priv->key_mapping_key;
else
is_default_wep_key = priv->default_wep_key;
}
switch (cmd) {
case SET_KEY:
if (is_default_wep_key)
ret = iwl_set_default_wep_key(priv, key);
else
ret = iwl_set_dynamic_key(priv, key, sta_id);
IWL_DEBUG_MAC80211("enable hwcrypto key\n");
break;
case DISABLE_KEY:
if (is_default_wep_key)
ret = iwl_remove_default_wep_key(priv, key);
else
ret = iwl_remove_dynamic_key(priv, sta_id);
IWL_DEBUG_MAC80211("disable hwcrypto key\n");
break;
default:
ret = -EINVAL;
}
IWL_DEBUG_MAC80211("leave\n");
return ret;
}
static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
const struct ieee80211_tx_queue_params *params)
{
struct iwl_priv *priv = hw->priv;
unsigned long flags;
int q;
IWL_DEBUG_MAC80211("enter\n");
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - RF not ready\n");
return -EIO;
}
if (queue >= AC_NUM) {
IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
return 0;
}
if (!priv->qos_data.qos_enable) {
priv->qos_data.qos_active = 0;
IWL_DEBUG_MAC80211("leave - qos not enabled\n");
return 0;
}
q = AC_NUM - 1 - queue;
spin_lock_irqsave(&priv->lock, flags);
priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
priv->qos_data.def_qos_parm.ac[q].edca_txop =
cpu_to_le16((params->txop * 32));
priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
priv->qos_data.qos_active = 1;
spin_unlock_irqrestore(&priv->lock, flags);
mutex_lock(&priv->mutex);
if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
iwl4965_activate_qos(priv, 1);
else if (priv->assoc_id && iwl_is_associated(priv))
iwl4965_activate_qos(priv, 0);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats)
{
struct iwl_priv *priv = hw->priv;
int i, avail;
struct iwl4965_tx_queue *txq;
struct iwl4965_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 = iwl4965_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 iwl4965_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 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
{
IWL_DEBUG_MAC80211("enter\n");
IWL_DEBUG_MAC80211("leave\n");
return 0;
}
static void iwl4965_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");
priv->lq_mngr.lq_ready = 0;
#ifdef CONFIG_IWL4965_HT
spin_lock_irqsave(&priv->lock, flags);
memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
spin_unlock_irqrestore(&priv->lock, flags);
#endif /* CONFIG_IWL4965_HT */
iwlcore_reset_qos(priv);
cancel_delayed_work(&priv->post_associate);
spin_lock_irqsave(&priv->lock, flags);
priv->assoc_id = 0;
priv->assoc_capability = 0;
priv->assoc_station_added = 0;
/* new association get rid of ibss beacon skb */
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
priv->beacon_int = priv->hw->conf.beacon_int;
priv->timestamp = 0;
if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
priv->beacon_int = 0;
spin_unlock_irqrestore(&priv->lock, flags);
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_MAC80211("leave - not ready\n");
mutex_unlock(&priv->mutex);
return;
}
/* we are restarting association process
* clear RXON_FILTER_ASSOC_MSK bit
*/
if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
iwl4965_scan_cancel_timeout(priv, 100);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwl4965_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;
}
iwl4965_set_rate(priv);
mutex_unlock(&priv->mutex);
IWL_DEBUG_MAC80211("leave\n");
}
static int iwl4965_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);
iwlcore_reset_qos(priv);
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_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", iwl4965_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 iwl4965_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
iwl4965_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 (iwl4965_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);
iwl4965_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 (iwl4965_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);
iwl4965_commit_rxon(priv);
}
}
mutex_unlock(&priv->mutex);
return count;
}
static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
store_filter_flags);
#ifdef CONFIG_IWL4965_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 iwl4965_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);
iwl4965_get_measurement(priv, &params, type);
return count;
}
static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
show_measurement, store_measurement);
#endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
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 = iwl4965_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)
{
/* all this shit doesn't belong into sysfs anyway */
return 0;
}
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 iwl4965_notif_statistics);
u32 len = 0, ofs = 0;
u8 *data = (u8 *) & priv->statistics;
int rc = 0;
if (!iwl_is_alive(priv))
return -EAGAIN;
mutex_lock(&priv->mutex);
rc = iwl_send_statistics_request(priv, 0);
mutex_unlock(&priv->mutex);
if (rc) {
len = sprintf(buf,
"Error sending statistics request: 0x%08X\n", rc);
return len;
}
while (size && (PAGE_SIZE - len)) {
hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
PAGE_SIZE - len, 1);
len = strlen(buf);
if (PAGE_SIZE - len)
buf[len++] = '\n';
ofs += 16;
size -= min(size, 16U);
}
return len;
}
static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
static ssize_t show_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 iwl4965_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')
iwl4965_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')
iwl4965_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 iwl4965_setup_deferred_work(struct iwl_priv *priv)
{
priv->workqueue = create_workqueue(DRV_NAME);
init_waitqueue_head(&priv->wait_command_queue);
INIT_WORK(&priv->up, iwl4965_bg_up);
INIT_WORK(&priv->restart, iwl4965_bg_restart);
INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
iwl4965_hw_setup_deferred_work(priv);
tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
iwl4965_irq_tasklet, (unsigned long)priv);
}
static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
{
iwl4965_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 *iwl4965_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_IWL4965_SPECTRUM_MEASUREMENT
&dev_attr_measurement.attr,
#endif
&dev_attr_power_level.attr,
&dev_attr_retry_rate.attr,
&dev_attr_rs_window.attr,
&dev_attr_statistics.attr,
&dev_attr_status.attr,
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
NULL
};
static struct attribute_group iwl4965_attribute_group = {
.name = NULL, /* put in device directory */
.attrs = iwl4965_sysfs_entries,
};
static struct ieee80211_ops iwl4965_hw_ops = {
.tx = iwl4965_mac_tx,
.start = iwl4965_mac_start,
.stop = iwl4965_mac_stop,
.add_interface = iwl4965_mac_add_interface,
.remove_interface = iwl4965_mac_remove_interface,
.config = iwl4965_mac_config,
.config_interface = iwl4965_mac_config_interface,
.configure_filter = iwl4965_configure_filter,
.set_key = iwl4965_mac_set_key,
.update_tkip_key = iwl4965_mac_update_tkip_key,
.get_stats = iwl4965_mac_get_stats,
.get_tx_stats = iwl4965_mac_get_tx_stats,
.conf_tx = iwl4965_mac_conf_tx,
.get_tsf = iwl4965_mac_get_tsf,
.reset_tsf = iwl4965_mac_reset_tsf,
.beacon_update = iwl4965_mac_beacon_update,
.bss_info_changed = iwl4965_bss_info_changed,
#ifdef CONFIG_IWL4965_HT
.ampdu_action = iwl4965_mac_ampdu_action,
#endif /* CONFIG_IWL4965_HT */
.hw_scan = iwl4965_mac_hw_scan
};
static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = 0;
struct iwl_priv *priv;
struct ieee80211_hw *hw;
struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
unsigned long flags;
DECLARE_MAC_BUF(mac);
/************************
* 1. Allocating HW data
************************/
/* Disabling hardware scan means that mac80211 will perform scans
* "the hard way", rather than using device's scan. */
if (cfg->mod_params->disable_hw_scan) {
IWL_DEBUG_INFO("Disabling hw_scan\n");
iwl4965_hw_ops.hw_scan = NULL;
}
hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
if (!hw) {
err = -ENOMEM;
goto out;
}
priv = hw->priv;
/* At this point both hw and priv are allocated. */
SET_IEEE80211_DEV(hw, &pdev->dev);
IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
priv->cfg = cfg;
priv->pci_dev = pdev;
#ifdef CONFIG_IWLWIFI_DEBUG
iwl_debug_level = priv->cfg->mod_params->debug;
atomic_set(&priv->restrict_refcnt, 0);
#endif
/**************************
* 2. Initializing PCI bus
**************************/
if (pci_enable_device(pdev)) {
err = -ENODEV;
goto out_ieee80211_free_hw;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_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;
}
err = pci_request_regions(pdev, DRV_NAME);
if (err)
goto out_pci_disable_device;
pci_set_drvdata(pdev, priv);
/* 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);
/***********************
* 3. Read REV register
***********************/
priv->hw_base = pci_iomap(pdev, 0, 0);
if (!priv->hw_base) {
err = -ENODEV;
goto out_pci_release_regions;
}
IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
(unsigned long long) pci_resource_len(pdev, 0));
IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
printk(KERN_INFO DRV_NAME
": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
/*****************
* 4. Read EEPROM
*****************/
/* nic init */
iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
err = iwl_poll_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
if (err < 0) {
IWL_DEBUG_INFO("Failed to init the card\n");
goto out_iounmap;
}
/* Read the EEPROM */
err = iwl_eeprom_init(priv);
if (err) {
IWL_ERROR("Unable to init EEPROM\n");
goto out_iounmap;
}
/* MAC Address location in EEPROM same for 3945/4965 */
iwl_eeprom_get_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);
/************************
* 5. Setup HW constants
************************/
/* Device-specific setup */
if (priv->cfg->ops->lib->set_hw_params(priv)) {
IWL_ERROR("failed to set hw parameters\n");
goto out_iounmap;
}
/*******************
* 6. Setup hw/priv
*******************/
err = iwl_setup(priv);
if (err)
goto out_unset_hw_params;
/* At this point both hw and priv are initialized. */
/**********************************
* 7. Initialize module parameters
**********************************/
/* Disable radio (SW RF KILL) via parameter when loading driver */
if (priv->cfg->mod_params->disable) {
set_bit(STATUS_RF_KILL_SW, &priv->status);
IWL_DEBUG_INFO("Radio disabled.\n");
}
if (priv->cfg->mod_params->enable_qos)
priv->qos_data.qos_enable = 1;
/********************
* 8. Setup services
********************/
spin_lock_irqsave(&priv->lock, flags);
iwl4965_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
if (err) {
IWL_ERROR("failed to create sysfs device attributes\n");
goto out_unset_hw_params;
}
err = iwl_dbgfs_register(priv, DRV_NAME);
if (err) {
IWL_ERROR("failed to create debugfs files\n");
goto out_remove_sysfs;
}
iwl4965_setup_deferred_work(priv);
iwl4965_setup_rx_handlers(priv);
/********************
* 9. Conclude
********************/
pci_save_state(pdev);
pci_disable_device(pdev);
/* notify iwlcore to init */
iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
return 0;
out_remove_sysfs:
sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
out_unset_hw_params:
iwl4965_unset_hw_params(priv);
out_iounmap:
pci_iounmap(pdev, priv->hw_base);
out_pci_release_regions:
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
out_pci_disable_device:
pci_disable_device(pdev);
out_ieee80211_free_hw:
ieee80211_free_hw(priv->hw);
out:
return err;
}
static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
struct list_head *p, *q;
int i;
unsigned long flags;
if (!priv)
return;
IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
if (priv->mac80211_registered) {
ieee80211_unregister_hw(priv->hw);
priv->mac80211_registered = 0;
}
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl4965_down(priv);
/* make sure we flush any pending irq or
* tasklet for the driver
*/
spin_lock_irqsave(&priv->lock, flags);
iwl4965_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
/* 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 iwl4965_ibss_seq, list));
}
}
iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
iwl_dbgfs_unregister(priv);
sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
iwl4965_dealloc_ucode_pci(priv);
if (priv->rxq.bd)
iwl4965_rx_queue_free(priv, &priv->rxq);
iwl4965_hw_txq_ctx_free(priv);
iwl4965_unset_hw_params(priv);
iwlcore_clear_stations_table(priv);
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
pci_iounmap(pdev, priv->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
iwl_free_channel_map(priv);
iwl4965_free_geos(priv);
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
ieee80211_free_hw(priv->hw);
}
#ifdef CONFIG_PM
static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
if (priv->is_open) {
set_bit(STATUS_IN_SUSPEND, &priv->status);
iwl4965_mac_stop(priv->hw);
priv->is_open = 1;
}
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
static int iwl4965_pci_resume(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
pci_set_power_state(pdev, PCI_D0);
if (priv->is_open)
iwl4965_mac_start(priv->hw);
clear_bit(STATUS_IN_SUSPEND, &priv->status);
return 0;
}
#endif /* CONFIG_PM */
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
/* Hardware specific file defines the PCI IDs table for that hardware module */
static struct pci_device_id iwl_hw_card_ids[] = {
{IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
{IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
{0}
};
MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
static struct pci_driver iwl_driver = {
.name = DRV_NAME,
.id_table = iwl_hw_card_ids,
.probe = iwl4965_pci_probe,
.remove = __devexit_p(iwl4965_pci_remove),
#ifdef CONFIG_PM
.suspend = iwl4965_pci_suspend,
.resume = iwl4965_pci_resume,
#endif
};
static int __init iwl4965_init(void)
{
int ret;
printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
ret = iwl4965_rate_control_register();
if (ret) {
IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = pci_register_driver(&iwl_driver);
if (ret) {
IWL_ERROR("Unable to initialize PCI module\n");
goto error_register;
}
#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");
goto error_debug;
}
#endif
return ret;
#ifdef CONFIG_IWLWIFI_DEBUG
error_debug:
pci_unregister_driver(&iwl_driver);
#endif
error_register:
iwl4965_rate_control_unregister();
return ret;
}
static void __exit iwl4965_exit(void)
{
#ifdef CONFIG_IWLWIFI_DEBUG
driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
#endif
pci_unregister_driver(&iwl_driver);
iwl4965_rate_control_unregister();
}
module_exit(iwl4965_exit);
module_init(iwl4965_init);