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linux/drivers/net/wireless/iwlwifi/iwl3945-base.c
Wey-Yi Guy a13d276f1e iwlwifi: configure missed beacon threshold 
Add support to configure missed beacon threshold, by default, if receive
"missed beacon" notification from uCode and has more than 5 consecutive
beacon missed, then perform sensitivity calibration; with this change,
allow user to adjust the missed beacon threshold from debugfs in case
more sensitivity calibration required for better performance in noisy
environment

The default value (=5) should be good enough for the normal condition,
but for very noisy environment, more sensitivity calibration could help
improve the throughput, so by setting the missed beacon threshold to
lower number, user might experience better performance result.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-01-25 16:36:19 -05:00

4331 lines
121 KiB
C
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/******************************************************************************
*
* Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <net/ieee80211_radiotap.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#define DRV_NAME "iwl3945"
#include "iwl-fh.h"
#include "iwl-3945-fh.h"
#include "iwl-commands.h"
#include "iwl-sta.h"
#include "iwl-3945.h"
#include "iwl-helpers.h"
#include "iwl-core.h"
#include "iwl-dev.h"
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION \
"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif
#define DRV_VERSION IWLWIFI_VERSION VD VS
#define DRV_COPYRIGHT "Copyright(c) 2003-2010 Intel Corporation"
#define DRV_AUTHOR "<ilw@linux.intel.com>"
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
/* module parameters */
struct iwl_mod_params iwl3945_mod_params = {
.sw_crypto = 1,
.restart_fw = 1,
/* the rest are 0 by default */
};
/**
* iwl3945_get_antenna_flags - Get antenna flags for RXON command
* @priv: eeprom and antenna fields are used to determine antenna flags
*
* priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
* iwl3945_mod_params.antenna specifies the antenna diversity mode:
*
* IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
* IWL_ANTENNA_MAIN - Force MAIN antenna
* IWL_ANTENNA_AUX - Force AUX antenna
*/
__le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
{
struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
switch (iwl3945_mod_params.antenna) {
case IWL_ANTENNA_DIVERSITY:
return 0;
case IWL_ANTENNA_MAIN:
if (eeprom->antenna_switch_type)
return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
case IWL_ANTENNA_AUX:
if (eeprom->antenna_switch_type)
return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
}
/* bad antenna selector value */
IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
iwl3945_mod_params.antenna);
return 0; /* "diversity" is default if error */
}
static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
int ret;
key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->hw_key_idx = keyconf->keyidx;
key_flags &= ~STA_KEY_FLG_INVALID;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
keyconf->keylen);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
keyconf->keylen);
if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
== STA_KEY_FLG_NO_ENC)
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
"no space for a new key");
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
return -EOPNOTSUPP;
}
static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
return -EOPNOTSUPP;
}
static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
memset(&priv->stations[sta_id].sta.key, 0,
sizeof(struct iwl4965_keyinfo));
priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
return 0;
}
static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
int ret = 0;
keyconf->hw_key_idx = HW_KEY_DYNAMIC;
switch (keyconf->alg) {
case ALG_CCMP:
ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
break;
case ALG_TKIP:
ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
break;
case ALG_WEP:
ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
break;
default:
IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
ret = -EINVAL;
}
IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
keyconf->alg, keyconf->keylen, keyconf->keyidx,
sta_id, ret);
return ret;
}
static int iwl3945_remove_static_key(struct iwl_priv *priv)
{
int ret = -EOPNOTSUPP;
return ret;
}
static int iwl3945_set_static_key(struct iwl_priv *priv,
struct ieee80211_key_conf *key)
{
if (key->alg == ALG_WEP)
return -EOPNOTSUPP;
IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
return -EINVAL;
}
static void iwl3945_clear_free_frames(struct iwl_priv *priv)
{
struct list_head *element;
IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
priv->frames_count);
while (!list_empty(&priv->free_frames)) {
element = priv->free_frames.next;
list_del(element);
kfree(list_entry(element, struct iwl3945_frame, list));
priv->frames_count--;
}
if (priv->frames_count) {
IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
priv->frames_count);
priv->frames_count = 0;
}
}
static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
{
struct iwl3945_frame *frame;
struct list_head *element;
if (list_empty(&priv->free_frames)) {
frame = kzalloc(sizeof(*frame), GFP_KERNEL);
if (!frame) {
IWL_ERR(priv, "Could not allocate frame!\n");
return NULL;
}
priv->frames_count++;
return frame;
}
element = priv->free_frames.next;
list_del(element);
return list_entry(element, struct iwl3945_frame, list);
}
static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
{
memset(frame, 0, sizeof(*frame));
list_add(&frame->list, &priv->free_frames);
}
unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
struct ieee80211_hdr *hdr,
int left)
{
if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
(priv->iw_mode != NL80211_IFTYPE_AP)))
return 0;
if (priv->ibss_beacon->len > left)
return 0;
memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
return priv->ibss_beacon->len;
}
static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
{
struct iwl3945_frame *frame;
unsigned int frame_size;
int rc;
u8 rate;
frame = iwl3945_get_free_frame(priv);
if (!frame) {
IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
"command.\n");
return -ENOMEM;
}
rate = iwl_rate_get_lowest_plcp(priv);
frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
&frame->u.cmd[0]);
iwl3945_free_frame(priv, frame);
return rc;
}
static void iwl3945_unset_hw_params(struct iwl_priv *priv)
{
if (priv->shared_virt)
pci_free_consistent(priv->pci_dev,
sizeof(struct iwl3945_shared),
priv->shared_virt,
priv->shared_phys);
}
static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
struct ieee80211_tx_info *info,
struct iwl_device_cmd *cmd,
struct sk_buff *skb_frag,
int sta_id)
{
struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
switch (keyinfo->alg) {
case ALG_CCMP:
tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
break;
case ALG_TKIP:
break;
case ALG_WEP:
tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
(info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
if (keyinfo->keylen == 13)
tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
"with key %d\n", info->control.hw_key->hw_key_idx);
break;
default:
IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
break;
}
}
/*
* handle build REPLY_TX command notification.
*/
static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
struct iwl_device_cmd *cmd,
struct ieee80211_tx_info *info,
struct ieee80211_hdr *hdr, u8 std_id)
{
struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
__le32 tx_flags = tx_cmd->tx_flags;
__le16 fc = hdr->frame_control;
tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if (ieee80211_is_mgmt(fc))
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ieee80211_is_probe_resp(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;
}
tx_cmd->sta_id = std_id;
if (ieee80211_has_morefrags(fc))
tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
if (ieee80211_is_data_qos(fc)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
} else {
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
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 (ieee80211_is_mgmt(fc)) {
if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
else
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
} else {
tx_cmd->timeout.pm_frame_timeout = 0;
}
tx_cmd->driver_txop = 0;
tx_cmd->tx_flags = tx_flags;
tx_cmd->next_frame_len = 0;
}
/*
* start REPLY_TX command process
*/
static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct iwl3945_tx_cmd *tx_cmd;
struct iwl_tx_queue *txq = NULL;
struct iwl_queue *q = NULL;
struct iwl_device_cmd *out_cmd;
struct iwl_cmd_meta *out_meta;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
int txq_id = skb_get_queue_mapping(skb);
u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
u8 id;
u8 unicast;
u8 sta_id;
u8 tid = 0;
u16 seq_number = 0;
__le16 fc;
u8 wait_write_ptr = 0;
u8 *qc = NULL;
unsigned long flags;
int rc;
spin_lock_irqsave(&priv->lock, flags);
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
goto drop_unlock;
}
if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
IWL_ERR(priv, "ERROR: No TX rate available.\n");
goto drop_unlock;
}
unicast = !is_multicast_ether_addr(hdr->addr1);
id = 0;
fc = hdr->frame_control;
#ifdef CONFIG_IWLWIFI_DEBUG
if (ieee80211_is_auth(fc))
IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
else if (ieee80211_is_assoc_req(fc))
IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
else if (ieee80211_is_reassoc_req(fc))
IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
#endif
/* drop all non-injected data frame if we are not associated */
if (ieee80211_is_data(fc) &&
!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
(!iwl_is_associated(priv) ||
((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
goto drop_unlock;
}
spin_unlock_irqrestore(&priv->lock, flags);
hdr_len = ieee80211_hdrlen(fc);
/* Find (or create) index into station table for destination station */
if (info->flags & IEEE80211_TX_CTL_INJECTED)
sta_id = priv->hw_params.bcast_sta_id;
else
sta_id = iwl_get_sta_id(priv, hdr);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
hdr->addr1);
goto drop;
}
IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
if (unlikely(tid >= MAX_TID_COUNT))
goto drop;
seq_number = priv->stations[sta_id].tid[tid].seq_number &
IEEE80211_SCTL_SEQ;
hdr->seq_ctrl = cpu_to_le16(seq_number) |
(hdr->seq_ctrl &
cpu_to_le16(IEEE80211_SCTL_FRAG));
seq_number += 0x10;
}
/* Descriptor for chosen Tx queue */
txq = &priv->txq[txq_id];
q = &txq->q;
if ((iwl_queue_space(q) < q->high_mark))
goto drop;
spin_lock_irqsave(&priv->lock, flags);
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 iwl_tx_info));
txq->txb[q->write_ptr].skb[0] = skb;
/* Init first empty entry in queue's array of Tx/cmd buffers */
out_cmd = txq->cmd[idx];
out_meta = &txq->meta[idx];
tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
memset(tx_cmd, 0, sizeof(*tx_cmd));
/*
* 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(tx_cmd->hdr, hdr, hdr_len);
if (info->control.hw_key)
iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
/* TODO need this for burst mode later on */
iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
/* set is_hcca to 0; it probably will never be implemented */
iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
/* Total # bytes to be transmitted */
len = (u16)skb->len;
tx_cmd->len = cpu_to_le16(len);
iwl_dbg_log_tx_data_frame(priv, len, hdr);
iwl_update_stats(priv, true, fc, len);
tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
if (!ieee80211_has_morefrags(hdr->frame_control)) {
txq->need_update = 1;
if (qc)
priv->stations[sta_id].tid[tid].seq_number = seq_number;
} else {
wait_write_ptr = 1;
txq->need_update = 0;
}
IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
le16_to_cpu(out_cmd->hdr.sequence));
IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
ieee80211_hdrlen(fc));
/*
* 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 = sizeof(struct iwl3945_tx_cmd) +
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 = pci_map_single(priv->pci_dev, &out_cmd->hdr,
len, PCI_DMA_TODEVICE);
/* we do not map meta data ... so we can safely access address to
* provide to unmap command*/
pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
pci_unmap_len_set(out_meta, len, len);
/* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */
priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
txcmd_phys, len, 1, 0);
/* 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);
priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
phys_addr, len,
0, U32_PAD(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 = iwl_txq_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->lock, flags);
if (rc)
return rc;
if ((iwl_queue_space(q) < q->high_mark)
&& priv->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&priv->lock, flags);
txq->need_update = 1;
iwl_txq_update_write_ptr(priv, txq);
spin_unlock_irqrestore(&priv->lock, flags);
}
iwl_stop_queue(priv, skb_get_queue_mapping(skb));
}
return 0;
drop_unlock:
spin_unlock_irqrestore(&priv->lock, flags);
drop:
return -1;
}
#ifdef CONFIG_IWL3945_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 iwl3945_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 iwl3945_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 iwl3945_get_measurement(struct iwl_priv *priv,
struct ieee80211_measurement_params *params,
u8 type)
{
struct iwl_spectrum_cmd spectrum;
struct iwl_rx_packet *pkt;
struct iwl_host_cmd cmd = {
.id = REPLY_SPECTRUM_MEASUREMENT_CMD,
.data = (void *)&spectrum,
.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 =
iwl3945_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 =
iwl3945_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;
pkt = (struct iwl_rx_packet *)cmd.reply_page;
if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
rc = -EIO;
}
spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
switch (spectrum_resp_status) {
case 0: /* Command will be handled */
if (pkt->u.spectrum.id != 0xff) {
IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
pkt->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;
}
iwl_free_pages(priv, cmd.reply_page);
return rc;
}
#endif
static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_alive_resp *palive;
struct delayed_work *pwork;
palive = &pkt->u.alive_frame;
IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
"0x%01X 0x%01X\n",
palive->is_valid, palive->ver_type,
palive->ver_subtype);
if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
sizeof(struct iwl_alive_resp));
pwork = &priv->init_alive_start;
} else {
IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
memcpy(&priv->card_alive, &pkt->u.alive_frame,
sizeof(struct iwl_alive_resp));
pwork = &priv->alive_start;
iwl3945_disable_events(priv);
}
/* We delay the ALIVE response by 5ms to
* give the HW RF Kill time to activate... */
if (palive->is_valid == UCODE_VALID_OK)
queue_delayed_work(priv->workqueue, pwork,
msecs_to_jiffies(5));
else
IWL_WARN(priv, "uCode did not respond OK.\n");
}
static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = rxb_addr(rxb);
#endif
IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
return;
}
static void iwl3945_bg_beacon_update(struct work_struct *work)
{
struct iwl_priv *priv =
container_of(work, struct iwl_priv, beacon_update);
struct sk_buff *beacon;
/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
beacon = ieee80211_beacon_get(priv->hw, priv->vif);
if (!beacon) {
IWL_ERR(priv, "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);
iwl3945_send_beacon_cmd(priv);
}
static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
u8 rate = beacon->beacon_notify_hdr.rate;
IWL_DEBUG_RX(priv, "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 == NL80211_IFTYPE_AP) &&
(!test_bit(STATUS_EXIT_PENDING, &priv->status)))
queue_work(priv->workqueue, &priv->beacon_update);
}
/* Handle notification from uCode that card's power state is changing
* due to software, hardware, or critical temperature RFKILL */
static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
unsigned long status = priv->status;
IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
(flags & HW_CARD_DISABLED) ? "Kill" : "On",
(flags & SW_CARD_DISABLED) ? "Kill" : "On");
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
if (flags & HW_CARD_DISABLED)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
iwl_scan_cancel(priv);
if ((test_bit(STATUS_RF_KILL_HW, &status) !=
test_bit(STATUS_RF_KILL_HW, &priv->status)))
wiphy_rfkill_set_hw_state(priv->hw->wiphy,
test_bit(STATUS_RF_KILL_HW, &priv->status));
else
wake_up_interruptible(&priv->wait_command_queue);
}
/**
* iwl3945_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 iwl3945_setup_rx_handlers(struct iwl_priv *priv)
{
priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
iwl_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_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] = iwl3945_hw_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
iwl_setup_spectrum_handlers(priv);
iwl_setup_rx_scan_handlers(priv);
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
/* Set up hardware specific Rx handlers */
iwl3945_hw_rx_handler_setup(priv);
}
/************************** RX-FUNCTIONS ****************************/
/*
* Rx theory of operation
*
* The host allocates 32 DMA target addresses and passes the host address
* to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
* 0 to 31
*
* Rx Queue Indexes
* The host/firmware share two index registers for managing the Rx buffers.
*
* The READ index maps to the first position that the firmware may be writing
* to -- the driver can read up to (but not including) this position and get
* good data.
* The READ index is managed by the firmware once the card is enabled.
*
* The WRITE index maps to the last position the driver has read from -- the
* position preceding WRITE is the last slot the firmware can place a packet.
*
* The queue is empty (no good data) if WRITE = READ - 1, and is full if
* WRITE = READ.
*
* During initialization, the host sets up the READ queue position to the first
* INDEX position, and WRITE to the last (READ - 1 wrapped)
*
* When the firmware places a packet in a buffer, it will advance the READ index
* and fire the RX interrupt. The driver can then query the READ index and
* process as many packets as possible, moving the WRITE index forward as it
* resets the Rx queue buffers with new memory.
*
* The management in the driver is as follows:
* + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
* iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
* to replenish the iwl->rxq->rx_free.
* + In iwl3945_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:
*
* iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
* iwl3945_rx_queue_restock
* iwl3945_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 iwl3945_rx_replenish
*
* -- enable interrupts --
* ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
* READ INDEX, detaching the SKB from the pool.
* Moves the packet buffer from queue to rx_used.
* Calls iwl3945_rx_queue_restock to refill any empty
* slots.
* ...
*
*/
/**
* iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
*/
static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
dma_addr_t dma_addr)
{
return cpu_to_le32((u32)dma_addr);
}
/**
* iwl3945_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 iwl3945_rx_queue_restock(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl_rx_mem_buffer *rxb;
unsigned long flags;
int write, rc;
spin_lock_irqsave(&rxq->lock, flags);
write = rxq->write & ~0x7;
while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
/* Get next free Rx buffer, remove from free list */
element = rxq->rx_free.next;
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
list_del(element);
/* Point to Rx buffer via next RBD in circular buffer */
rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
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 ((rxq->write_actual != (rxq->write & ~0x7))
|| (abs(rxq->write - rxq->read) > 7)) {
spin_lock_irqsave(&rxq->lock, flags);
rxq->need_update = 1;
spin_unlock_irqrestore(&rxq->lock, flags);
rc = iwl_rx_queue_update_write_ptr(priv, rxq);
if (rc)
return rc;
}
return 0;
}
/**
* iwl3945_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 iwl3945_rx_queue_restock.
* This is called as a scheduled work item (except for during initialization)
*/
static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
{
struct iwl_rx_queue *rxq = &priv->rxq;
struct list_head *element;
struct iwl_rx_mem_buffer *rxb;
struct page *page;
unsigned long flags;
gfp_t gfp_mask = priority;
while (1) {
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
return;
}
spin_unlock_irqrestore(&rxq->lock, flags);
if (rxq->free_count > RX_LOW_WATERMARK)
gfp_mask |= __GFP_NOWARN;
if (priv->hw_params.rx_page_order > 0)
gfp_mask |= __GFP_COMP;
/* Alloc a new receive buffer */
page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
if (!page) {
if (net_ratelimit())
IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
if ((rxq->free_count <= RX_LOW_WATERMARK) &&
net_ratelimit())
IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
rxq->free_count);
/* 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;
}
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
__free_pages(page, priv->hw_params.rx_page_order);
return;
}
element = rxq->rx_used.next;
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
list_del(element);
spin_unlock_irqrestore(&rxq->lock, flags);
rxb->page = page;
/* Get physical address of RB/SKB */
rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
PAGE_SIZE << priv->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
spin_lock_irqsave(&rxq->lock, flags);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
priv->alloc_rxb_page++;
spin_unlock_irqrestore(&rxq->lock, flags);
}
}
void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
unsigned long flags;
int i;
spin_lock_irqsave(&rxq->lock, flags);
INIT_LIST_HEAD(&rxq->rx_free);
INIT_LIST_HEAD(&rxq->rx_used);
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
/* In the reset function, these buffers may have been allocated
* to an SKB, so we need to unmap and free potential storage */
if (rxq->pool[i].page != NULL) {
pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
__iwl_free_pages(priv, rxq->pool[i].page);
rxq->pool[i].page = 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->write_actual = 0;
rxq->free_count = 0;
spin_unlock_irqrestore(&rxq->lock, flags);
}
void iwl3945_rx_replenish(void *data)
{
struct iwl_priv *priv = data;
unsigned long flags;
iwl3945_rx_allocate(priv, GFP_KERNEL);
spin_lock_irqsave(&priv->lock, flags);
iwl3945_rx_queue_restock(priv);
spin_unlock_irqrestore(&priv->lock, flags);
}
static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
{
iwl3945_rx_allocate(priv, GFP_ATOMIC);
iwl3945_rx_queue_restock(priv);
}
/* 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 iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
int i;
for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
if (rxq->pool[i].page != NULL) {
pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
__iwl_free_pages(priv, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
}
pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
rxq->dma_addr);
pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
rxq->rb_stts, rxq->rb_stts_dma);
rxq->bd = NULL;
rxq->rb_stts = NULL;
}
/* 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 iwl3945_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];
}
/**
* iwl3945_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 iwl3945_rx_handle(struct iwl_priv *priv)
{
struct iwl_rx_mem_buffer *rxb;
struct iwl_rx_packet *pkt;
struct iwl_rx_queue *rxq = &priv->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
u8 fill_rx = 0;
u32 count = 8;
int total_empty = 0;
/* uCode's read index (stored in shared DRAM) indicates the last Rx
* buffer that the driver may process (last buffer filled by ucode). */
r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
i = rxq->read;
/* calculate total frames need to be restock after handling RX */
total_empty = r - rxq->write_actual;
if (total_empty < 0)
total_empty += RX_QUEUE_SIZE;
if (total_empty > (RX_QUEUE_SIZE / 2))
fill_rx = 1;
/* Rx interrupt, but nothing sent from uCode */
if (i == r)
IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
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_unmap_page(priv->pci_dev, rxb->page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
pkt = rxb_addr(rxb);
trace_iwlwifi_dev_rx(priv, pkt,
le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
/* Reclaim a command buffer only if this packet is a response
* to a (driver-originated) command.
* If the packet (e.g. Rx frame) originated from uCode,
* there is no command buffer to reclaim.
* Ucode should set SEQ_RX_FRAME bit if ucode-originated,
* but apparently a few don't get set; catch them here. */
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
(pkt->hdr.cmd != REPLY_TX);
/* Based on type of command response or notification,
* handle those that need handling via function in
* rx_handlers table. See iwl3945_setup_rx_handlers() */
if (priv->rx_handlers[pkt->hdr.cmd]) {
IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
} else {
/* No handling needed */
IWL_DEBUG_RX(priv,
"r %d i %d No handler needed for %s, 0x%02x\n",
r, i, get_cmd_string(pkt->hdr.cmd),
pkt->hdr.cmd);
}
/*
* XXX: After here, we should always check rxb->page
* against NULL before touching it or its virtual
* memory (pkt). Because some rx_handler might have
* already taken or freed the pages.
*/
if (reclaim) {
/* Invoke any callbacks, transfer the buffer to caller,
* and fire off the (possibly) blocking iwl_send_cmd()
* as we reclaim the driver command queue */
if (rxb->page)
iwl_tx_cmd_complete(priv, rxb);
else
IWL_WARN(priv, "Claim null rxb?\n");
}
/* Reuse the page if possible. For notification packets and
* SKBs that fail to Rx correctly, add them back into the
* rx_free list for reuse later. */
spin_lock_irqsave(&rxq->lock, flags);
if (rxb->page != NULL) {
rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
0, PAGE_SIZE << priv->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
} else
list_add_tail(&rxb->list, &rxq->rx_used);
spin_unlock_irqrestore(&rxq->lock, flags);
i = (i + 1) & RX_QUEUE_MASK;
/* If there are a lot of unused frames,
* restock the Rx queue so ucode won't assert. */
if (fill_rx) {
count++;
if (count >= 8) {
rxq->read = i;
iwl3945_rx_replenish_now(priv);
count = 0;
}
}
}
/* Backtrack one entry */
rxq->read = i;
if (fill_rx)
iwl3945_rx_replenish_now(priv);
else
iwl3945_rx_queue_restock(priv);
}
/* call this function to flush any scheduled tasklet */
static inline void iwl_synchronize_irq(struct iwl_priv *priv)
{
/* wait to make sure we flush pending tasklet*/
synchronize_irq(priv->pci_dev->irq);
tasklet_kill(&priv->irq_tasklet);
}
static 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))
void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
{
u32 i;
u32 desc, time, count, base, data1;
u32 blink1, blink2, ilink1, ilink2;
base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
if (!iwl3945_hw_valid_rtc_data_addr(base)) {
IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
return;
}
count = iwl_read_targ_mem(priv, base);
if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
IWL_ERR(priv, "Start IWL Error Log Dump:\n");
IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
priv->status, count);
}
IWL_ERR(priv, "Desc Time asrtPC blink2 "
"ilink1 nmiPC Line\n");
for (i = ERROR_START_OFFSET;
i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
i += ERROR_ELEM_SIZE) {
desc = iwl_read_targ_mem(priv, base + i);
time =
iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
blink1 =
iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
blink2 =
iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
ilink1 =
iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
ilink2 =
iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
data1 =
iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
IWL_ERR(priv,
"%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
desc_lookup(desc), desc, time, blink1, blink2,
ilink1, ilink2, data1);
trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
0, blink1, blink2, ilink1, ilink2);
}
}
#define EVENT_START_OFFSET (6 * sizeof(u32))
/**
* iwl3945_print_event_log - Dump error event log to syslog
*
*/
static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
u32 num_events, u32 mode,
int pos, char **buf, size_t bufsz)
{
u32 i;
u32 base; /* SRAM byte address of event log header */
u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
u32 ptr; /* SRAM byte address of log data */
u32 ev, time, data; /* event log data */
unsigned long reg_flags;
if (num_events == 0)
return pos;
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (mode == 0)
event_size = 2 * sizeof(u32);
else
event_size = 3 * sizeof(u32);
ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
/* Make sure device is powered up for SRAM reads */
spin_lock_irqsave(&priv->reg_lock, reg_flags);
iwl_grab_nic_access(priv);
/* Set starting address; reads will auto-increment */
_iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
rmb();
/* "time" is actually "data" for mode 0 (no timestamp).
* place event id # at far right for easier visual parsing. */
for (i = 0; i < num_events; i++) {
ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
if (mode == 0) {
/* data, ev */
if (bufsz) {
pos += scnprintf(*buf + pos, bufsz - pos,
"0x%08x:%04u\n",
time, ev);
} else {
IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
trace_iwlwifi_dev_ucode_event(priv, 0,
time, ev);
}
} else {
data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
if (bufsz) {
pos += scnprintf(*buf + pos, bufsz - pos,
"%010u:0x%08x:%04u\n",
time, data, ev);
} else {
IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
time, data, ev);
trace_iwlwifi_dev_ucode_event(priv, time,
data, ev);
}
}
}
/* Allow device to power down */
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return pos;
}
/**
* iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
*/
static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
u32 num_wraps, u32 next_entry,
u32 size, u32 mode,
int pos, char **buf, size_t bufsz)
{
/*
* display the newest DEFAULT_LOG_ENTRIES entries
* i.e the entries just before the next ont that uCode would fill.
*/
if (num_wraps) {
if (next_entry < size) {
pos = iwl3945_print_event_log(priv,
capacity - (size - next_entry),
size - next_entry, mode,
pos, buf, bufsz);
pos = iwl3945_print_event_log(priv, 0,
next_entry, mode,
pos, buf, bufsz);
} else
pos = iwl3945_print_event_log(priv, next_entry - size,
size, mode,
pos, buf, bufsz);
} else {
if (next_entry < size)
pos = iwl3945_print_event_log(priv, 0,
next_entry, mode,
pos, buf, bufsz);
else
pos = iwl3945_print_event_log(priv, next_entry - size,
size, mode,
pos, buf, bufsz);
}
return pos;
}
/* For sanity check only. Actual size is determined by uCode, typ. 512 */
#define IWL3945_MAX_EVENT_LOG_SIZE (512)
#define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
char **buf, bool display)
{
u32 base; /* SRAM byte address of event log header */
u32 capacity; /* event log capacity in # entries */
u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
u32 num_wraps; /* # times uCode wrapped to top of log */
u32 next_entry; /* index of next entry to be written by uCode */
u32 size; /* # entries that we'll print */
int pos = 0;
size_t bufsz = 0;
base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
if (!iwl3945_hw_valid_rtc_data_addr(base)) {
IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
return -EINVAL;
}
/* event log header */
capacity = iwl_read_targ_mem(priv, base);
mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
capacity, IWL3945_MAX_EVENT_LOG_SIZE);
capacity = IWL3945_MAX_EVENT_LOG_SIZE;
}
if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
}
size = num_wraps ? capacity : next_entry;
/* bail out if nothing in log */
if (size == 0) {
IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
return pos;
}
#ifdef CONFIG_IWLWIFI_DEBUG
if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
#else
size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
#endif
IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
size);
#ifdef CONFIG_IWLWIFI_DEBUG
if (display) {
if (full_log)
bufsz = capacity * 48;
else
bufsz = size * 48;
*buf = kmalloc(bufsz, GFP_KERNEL);
if (!*buf)
return -ENOMEM;
}
if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
/* if uCode has wrapped back to top of log,
* start at the oldest entry,
* i.e the next one that uCode would fill.
*/
if (num_wraps)
pos = iwl3945_print_event_log(priv, next_entry,
capacity - next_entry, mode,
pos, buf, bufsz);
/* (then/else) start at top of log */
pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
pos, buf, bufsz);
} else
pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
next_entry, size, mode,
pos, buf, bufsz);
#else
pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
next_entry, size, mode,
pos, buf, bufsz);
#endif
return pos;
}
static void iwl3945_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_get_debug_level(priv) & IWL_DL_ISR) {
/* just for debug */
inta_mask = iwl_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
}
#endif
spin_unlock_irqrestore(&priv->lock, flags);
/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
* atomic, make sure that inta covers all the interrupts that
* we've discovered, even if FH interrupt came in just after
* reading CSR_INT. */
if (inta_fh & CSR39_FH_INT_RX_MASK)
inta |= CSR_INT_BIT_FH_RX;
if (inta_fh & CSR39_FH_INT_TX_MASK)
inta |= CSR_INT_BIT_FH_TX;
/* Now service all interrupt bits discovered above. */
if (inta & CSR_INT_BIT_HW_ERR) {
IWL_ERR(priv, "Hardware error detected. Restarting.\n");
/* Tell the device to stop sending interrupts */
iwl_disable_interrupts(priv);
priv->isr_stats.hw++;
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_HW_ERR;
return;
}
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
/* NIC fires this, but we don't use it, redundant with WAKEUP */
if (inta & CSR_INT_BIT_SCD) {
IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
"the frame/frames.\n");
priv->isr_stats.sch++;
}
/* Alive notification via Rx interrupt will do the real work */
if (inta & CSR_INT_BIT_ALIVE) {
IWL_DEBUG_ISR(priv, "Alive interrupt\n");
priv->isr_stats.alive++;
}
}
#endif
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
/* Error detected by uCode */
if (inta & CSR_INT_BIT_SW_ERR) {
IWL_ERR(priv, "Microcode SW error detected. "
"Restarting 0x%X.\n", inta);
priv->isr_stats.sw++;
priv->isr_stats.sw_err = inta;
iwl_irq_handle_error(priv);
handled |= CSR_INT_BIT_SW_ERR;
}
/* uCode wakes up after power-down sleep */
if (inta & CSR_INT_BIT_WAKEUP) {
IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
iwl_txq_update_write_ptr(priv, &priv->txq[0]);
iwl_txq_update_write_ptr(priv, &priv->txq[1]);
iwl_txq_update_write_ptr(priv, &priv->txq[2]);
iwl_txq_update_write_ptr(priv, &priv->txq[3]);
iwl_txq_update_write_ptr(priv, &priv->txq[4]);
iwl_txq_update_write_ptr(priv, &priv->txq[5]);
priv->isr_stats.wakeup++;
handled |= CSR_INT_BIT_WAKEUP;
}
/* All uCode command responses, including Tx command responses,
* Rx "responses" (frame-received notification), and other
* notifications from uCode come through here*/
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
iwl3945_rx_handle(priv);
priv->isr_stats.rx++;
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
}
if (inta & CSR_INT_BIT_FH_TX) {
IWL_DEBUG_ISR(priv, "Tx interrupt\n");
priv->isr_stats.tx++;
iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
iwl_write_direct32(priv, FH39_TCSR_CREDIT
(FH39_SRVC_CHNL), 0x0);
handled |= CSR_INT_BIT_FH_TX;
}
if (inta & ~handled) {
IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
priv->isr_stats.unhandled++;
}
if (inta & ~priv->inta_mask) {
IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
inta & ~priv->inta_mask);
IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
}
/* Re-enable all interrupts */
/* only Re-enable if disabled by irq */
if (test_bit(STATUS_INT_ENABLED, &priv->status))
iwl_enable_interrupts(priv);
#ifdef CONFIG_IWLWIFI_DEBUG
if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
inta = iwl_read32(priv, CSR_INT);
inta_mask = iwl_read32(priv, CSR_INT_MASK);
inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
"flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
}
#endif
}
static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
enum ieee80211_band band,
u8 is_active, u8 n_probes,
struct iwl3945_scan_channel *scan_ch)
{
struct ieee80211_channel *chan;
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 = iwl_get_hw_mode(priv, band);
if (!sband)
return 0;
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
passive_dwell = iwl_get_passive_dwell_time(priv, band);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
chan = priv->scan_request->channels[i];
if (chan->band != band)
continue;
scan_ch->channel = chan->hw_value;
ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
scan_ch->channel);
continue;
}
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* If passive , set up for auto-switch
* and use long active_dwell time.
*/
if (!is_active || is_channel_passive(ch_info) ||
(chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
scan_ch->type = 0; /* passive */
if (IWL_UCODE_API(priv->ucode_ver) == 1)
scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
} else {
scan_ch->type = 1; /* active */
}
/* Set direct probe bits. These may be used both for active
* scan channels (probes gets sent right away),
* or for passive channels (probes get se sent only after
* hearing clear Rx packet).*/
if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
if (n_probes)
scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
} else {
/* uCode v1 does not allow setting direct probe bits on
* passive channel. */
if ((scan_ch->type & 1) && n_probes)
scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
}
/* 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(priv, "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(priv, "total channels to scan %d \n", added);
return added;
}
static void iwl3945_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT; i++) {
rates[i].bitrate = iwl3945_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 > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void iwl3945_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);
}
/**
* iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
static int iwl3945_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(priv, "ucode inst image size is %u\n", len);
iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
IWL39_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_ERR(priv, "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;
}
}
if (!errcnt)
IWL_DEBUG_INFO(priv,
"ucode image in INSTRUCTION memory is good\n");
return rc;
}
/**
* iwl3945_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 iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
{
u32 val;
int rc = 0;
u32 errcnt = 0;
u32 i;
IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
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 + IWL39_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_ERR(priv, "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;
}
}
return rc;
}
/**
* iwl3945_verify_ucode - determine which instruction image is in SRAM,
* and verify its contents
*/
static int iwl3945_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 = iwl3945_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO(priv, "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 = iwl3945_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO(priv, "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 = iwl3945_verify_inst_sparse(priv, image, len);
if (rc == 0) {
IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
return 0;
}
IWL_ERR(priv, "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 = iwl3945_verify_inst_full(priv, image, len);
return rc;
}
static void iwl3945_nic_start(struct iwl_priv *priv)
{
/* Remove all resets to allow NIC to operate */
iwl_write32(priv, CSR_RESET, 0);
}
/**
* iwl3945_read_ucode - Read uCode images from disk file.
*
* Copy into buffers for card to fetch via bus-mastering
*/
static int iwl3945_read_ucode(struct iwl_priv *priv)
{
const struct iwl_ucode_header *ucode;
int ret = -EINVAL, index;
const struct firmware *ucode_raw;
/* firmware file name contains uCode/driver compatibility version */
const char *name_pre = priv->cfg->fw_name_pre;
const unsigned int api_max = priv->cfg->ucode_api_max;
const unsigned int api_min = priv->cfg->ucode_api_min;
char buf[25];
u8 *src;
size_t len;
u32 api_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. */
for (index = api_max; index >= api_min; index--) {
sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
if (ret < 0) {
IWL_ERR(priv, "%s firmware file req failed: %d\n",
buf, ret);
if (ret == -ENOENT)
continue;
else
goto error;
} else {
if (index < api_max)
IWL_ERR(priv, "Loaded firmware %s, "
"which is deprecated. "
" Please use API v%u instead.\n",
buf, api_max);
IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
"(%zd bytes) from disk\n",
buf, ucode_raw->size);
break;
}
}
if (ret < 0)
goto error;
/* Make sure that we got at least our header! */
if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
IWL_ERR(priv, "File size way too small!\n");
ret = -EINVAL;
goto err_release;
}
/* Data from ucode file: header followed by uCode images */
ucode = (struct iwl_ucode_header *)ucode_raw->data;
priv->ucode_ver = le32_to_cpu(ucode->ver);
api_ver = IWL_UCODE_API(priv->ucode_ver);
inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
init_data_size =
priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
/* api_ver should match the api version forming part of the
* firmware filename ... but we don't check for that and only rely
* on the API version read from firmware header from here on forward */
if (api_ver < api_min || api_ver > api_max) {
IWL_ERR(priv, "Driver unable to support your firmware API. "
"Driver supports v%u, firmware is v%u.\n",
api_max, api_ver);
priv->ucode_ver = 0;
ret = -EINVAL;
goto err_release;
}
if (api_ver != api_max)
IWL_ERR(priv, "Firmware has old API version. Expected %u, "
"got %u. New firmware can be obtained "
"from http://www.intellinuxwireless.org.\n",
api_max, api_ver);
IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
IWL_UCODE_MAJOR(priv->ucode_ver),
IWL_UCODE_MINOR(priv->ucode_ver),
IWL_UCODE_API(priv->ucode_ver),
IWL_UCODE_SERIAL(priv->ucode_ver));
snprintf(priv->hw->wiphy->fw_version,
sizeof(priv->hw->wiphy->fw_version),
"%u.%u.%u.%u",
IWL_UCODE_MAJOR(priv->ucode_ver),
IWL_UCODE_MINOR(priv->ucode_ver),
IWL_UCODE_API(priv->ucode_ver),
IWL_UCODE_SERIAL(priv->ucode_ver));
IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
priv->ucode_ver);
IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
inst_size);
IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
data_size);
IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
init_size);
IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
init_data_size);
IWL_DEBUG_INFO(priv, "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 != priv->cfg->ops->ucode->get_header_size(api_ver) +
inst_size + data_size + init_size +
init_data_size + boot_size) {
IWL_DEBUG_INFO(priv,
"uCode file size %zd does not match expected size\n",
ucode_raw->size);
ret = -EINVAL;
goto err_release;
}
/* Verify that uCode images will fit in card's SRAM */
if (inst_size > IWL39_MAX_INST_SIZE) {
IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
inst_size);
ret = -EINVAL;
goto err_release;
}
if (data_size > IWL39_MAX_DATA_SIZE) {
IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
data_size);
ret = -EINVAL;
goto err_release;
}
if (init_size > IWL39_MAX_INST_SIZE) {
IWL_DEBUG_INFO(priv,
"uCode init instr len %d too large to fit in\n",
init_size);
ret = -EINVAL;
goto err_release;
}
if (init_data_size > IWL39_MAX_DATA_SIZE) {
IWL_DEBUG_INFO(priv,
"uCode init data len %d too large to fit in\n",
init_data_size);
ret = -EINVAL;
goto err_release;
}
if (boot_size > IWL39_MAX_BSM_SIZE) {
IWL_DEBUG_INFO(priv,
"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);
if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
!priv->ucode_data_backup.v_addr)
goto err_pci_alloc;
/* Initialization instructions and data */
if (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) */
len = inst_size;
IWL_DEBUG_INFO(priv,
"Copying (but not loading) uCode instr len %zd\n", len);
memcpy(priv->ucode_code.v_addr, src, len);
src += len;
IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
/* Runtime data (2nd block)
* NOTE: Copy into backup buffer will be done in iwl3945_up() */
len = data_size;
IWL_DEBUG_INFO(priv,
"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);
src += len;
/* Initialization instructions (3rd block) */
if (init_size) {
len = init_size;
IWL_DEBUG_INFO(priv,
"Copying (but not loading) init instr len %zd\n", len);
memcpy(priv->ucode_init.v_addr, src, len);
src += len;
}
/* Initialization data (4th block) */
if (init_data_size) {
len = init_data_size;
IWL_DEBUG_INFO(priv,
"Copying (but not loading) init data len %zd\n", len);
memcpy(priv->ucode_init_data.v_addr, src, len);
src += len;
}
/* Bootstrap instructions (5th block) */
len = boot_size;
IWL_DEBUG_INFO(priv,
"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_ERR(priv, "failed to allocate pci memory\n");
ret = -ENOMEM;
iwl3945_dealloc_ucode_pci(priv);
err_release:
release_firmware(ucode_raw);
error:
return ret;
}
/**
* iwl3945_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 iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
{
dma_addr_t pinst;
dma_addr_t pdata;
/* bits 31:0 for 3945 */
pinst = priv->ucode_code.p_addr;
pdata = priv->ucode_data_backup.p_addr;
/* 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 byte count 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_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
return 0;
}
/**
* iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
*
* Called after REPLY_ALIVE notification received from "initialize" uCode.
*
* Tell "initialize" uCode to go ahead and load the runtime uCode.
*/
static void iwl3945_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(priv, "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 (iwl3945_verify_ucode(priv)) {
/* Runtime instruction load was bad;
* take it all the way back down so we can try again */
IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
goto restart;
}
/* Send pointers to protocol/runtime uCode image ... init code will
* load and launch runtime uCode, which will send us another "Alive"
* notification. */
IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
if (iwl3945_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(priv, "Couldn't set up uCode pointers.\n");
goto restart;
}
return;
restart:
queue_work(priv->workqueue, &priv->restart);
}
/**
* iwl3945_alive_start - called after REPLY_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by iwl3945_init_alive_start()).
*/
static void iwl3945_alive_start(struct iwl_priv *priv)
{
int thermal_spin = 0;
u32 rfkill;
IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
if (priv->card_alive.is_valid != UCODE_VALID_OK) {
/* We had an error bringing up the hardware, so take it
* all the way back down so we can try again */
IWL_DEBUG_INFO(priv, "Alive failed.\n");
goto restart;
}
/* Initialize uCode has loaded Runtime uCode ... verify inst image.
* This is a paranoid check, because we would not have gotten the
* "runtime" alive if code weren't properly loaded. */
if (iwl3945_verify_ucode(priv)) {
/* Runtime instruction load was bad;
* take it all the way back down so we can try again */
IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
goto restart;
}
iwl_clear_stations_table(priv);
rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
if (rfkill & 0x1) {
clear_bit(STATUS_RF_KILL_HW, &priv->status);
/* if RFKILL is not on, then wait for thermal
* sensor in adapter to kick in */
while (iwl3945_hw_get_temperature(priv) == 0) {
thermal_spin++;
udelay(10);
}
if (thermal_spin)
IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
thermal_spin * 10);
} else
set_bit(STATUS_RF_KILL_HW, &priv->status);
/* After the ALIVE response, we can send commands to 3945 uCode */
set_bit(STATUS_ALIVE, &priv->status);
if (iwl_is_rfkill(priv))
return;
ieee80211_wake_queues(priv->hw);
priv->active_rate = priv->rates_mask;
priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
iwl_power_update_mode(priv, true);
if (iwl_is_associated(priv)) {
struct iwl3945_rxon_cmd *active_rxon =
(struct iwl3945_rxon_cmd *)(&priv->active_rxon);
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
} else {
/* Initialize our rx_config data */
iwl_connection_init_rx_config(priv, priv->iw_mode);
}
/* Configure Bluetooth device coexistence support */
iwl_send_bt_config(priv);
/* Configure the adapter for unassociated operation */
iwlcore_commit_rxon(priv);
iwl3945_reg_txpower_periodic(priv);
iwl_leds_init(priv);
IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
set_bit(STATUS_READY, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
/* reassociate for ADHOC mode */
if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
priv->vif);
if (beacon)
iwl_mac_beacon_update(priv->hw, beacon);
}
if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
iwl_set_mode(priv, priv->iw_mode);
return;
restart:
queue_work(priv->workqueue, &priv->restart);
}
static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
static void __iwl3945_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(priv, DRV_NAME " is going down\n");
conf = ieee80211_get_hw_conf(priv->hw);
if (!exit_pending)
set_bit(STATUS_EXIT_PENDING, &priv->status);
iwl_clear_stations_table(priv);
/* Unblock any waiting calls */
wake_up_interruptible_all(&priv->wait_command_queue);
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
clear_bit(STATUS_EXIT_PENDING, &priv->status);
/* stop and reset the on-board processor */
iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
/* tell the device to stop sending interrupts */
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
if (priv->mac80211_registered)
ieee80211_stop_queues(priv->hw);
/* If we have not previously called iwl3945_init() then
* clear all bits but the RF Kill 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_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
goto exit;
}
/* ...otherwise clear out all the status bits but the RF Kill
* bit and continue taking the NIC down. */
priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_FW_ERROR, &priv->status) <<
STATUS_FW_ERROR |
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
iwl3945_hw_txq_ctx_stop(priv);
iwl3945_hw_rxq_stop(priv);
/* Power-down device's busmaster DMA clocks */
iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(5);
/* Stop the device, and put it in low power state */
priv->cfg->ops->lib->apm_ops.stop(priv);
exit:
memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
priv->ibss_beacon = NULL;
/* clear out any free frames */
iwl3945_clear_free_frames(priv);
}
static void iwl3945_down(struct iwl_priv *priv)
{
mutex_lock(&priv->mutex);
__iwl3945_down(priv);
mutex_unlock(&priv->mutex);
iwl3945_cancel_deferred_work(priv);
}
#define MAX_HW_RESTARTS 5
static int __iwl3945_up(struct iwl_priv *priv)
{
int rc, i;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
return -EIO;
}
if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
IWL_ERR(priv, "ucode not available for device bring up\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);
IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
return -ENODEV;
}
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl3945_hw_nic_init(priv);
if (rc) {
IWL_ERR(priv, "Unable to int nic\n");
return rc;
}
/* make sure rfkill handshake bits are cleared */
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
/* clear (again), then enable host interrupts */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
iwl_enable_interrupts(priv);
/* really make sure rfkill handshake bits are cleared */
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
/* Copy original ucode data image from disk into backup cache.
* This will be used to initialize the on-board processor's
* data SRAM for a clean start when the runtime program first loads. */
memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
priv->ucode_data.len);
/* 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++) {
iwl_clear_stations_table(priv);
/* load bootstrap state machine,
* load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */
priv->cfg->ops->lib->load_ucode(priv);
if (rc) {
IWL_ERR(priv,
"Unable to set up bootstrap uCode: %d\n", rc);
continue;
}
/* start card; "initialize" will load runtime ucode */
iwl3945_nic_start(priv);
IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
return 0;
}
set_bit(STATUS_EXIT_PENDING, &priv->status);
__iwl3945_down(priv);
clear_bit(STATUS_EXIT_PENDING, &priv->status);
/* tried to restart and config the device for as long as our
* patience could withstand */
IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
return -EIO;
}
/*****************************************************************************
*
* Workqueue callbacks
*
*****************************************************************************/
static void iwl3945_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);
iwl3945_init_alive_start(priv);
mutex_unlock(&priv->mutex);
}
static void iwl3945_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);
iwl3945_alive_start(priv);
mutex_unlock(&priv->mutex);
}
/*
* 3945 cannot interrupt driver when hardware rf kill switch toggles;
* driver must poll CSR_GP_CNTRL_REG register for change. This register
* *is* readable even when device has been SW_RESET into low power mode
* (e.g. during RF KILL).
*/
static void iwl3945_rfkill_poll(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, rfkill_poll.work);
bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
& CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
if (new_rfkill != old_rfkill) {
if (new_rfkill)
set_bit(STATUS_RF_KILL_HW, &priv->status);
else
clear_bit(STATUS_RF_KILL_HW, &priv->status);
wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
new_rfkill ? "disable radio" : "enable radio");
}
/* Keep this running, even if radio now enabled. This will be
* cancelled in mac_start() if system decides to start again */
queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
round_jiffies_relative(2 * HZ));
}
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
static void iwl3945_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 iwl3945_scan_cmd),
.flags = CMD_SIZE_HUGE,
};
int rc = 0;
struct iwl3945_scan_cmd *scan;
struct ieee80211_conf *conf = NULL;
u8 n_probes = 0;
enum ieee80211_band band;
bool is_active = false;
conf = ieee80211_get_hw_conf(priv->hw);
mutex_lock(&priv->mutex);
cancel_delayed_work(&priv->scan_check);
if (!iwl_is_ready(priv)) {
IWL_WARN(priv, "request scan called when driver not ready.\n");
goto done;
}
/* Make sure the scan wasn't canceled 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(priv, "Multiple concurrent scan requests "
"Ignoring second request.\n");
rc = -EIO;
goto done;
}
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
goto done;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_HC(priv,
"Scan request while abort pending. Queuing.\n");
goto done;
}
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
goto done;
}
if (!test_bit(STATUS_READY, &priv->status)) {
IWL_DEBUG_HC(priv,
"Scan request while uninitialized. Queuing.\n");
goto done;
}
if (!priv->scan_bands) {
IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
goto done;
}
if (!priv->scan) {
priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan) {
rc = -ENOMEM;
goto done;
}
}
scan = priv->scan;
memset(scan, 0, sizeof(struct iwl3945_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(priv, "Scanning while associated...\n");
spin_lock_irqsave(&priv->lock, flags);
interval = priv->beacon_int;
spin_unlock_irqrestore(&priv->lock, flags);
scan->suspend_time = 0;
scan->max_out_time = cpu_to_le32(200 * 1024);
if (!interval)
interval = suspend_time;
/*
* suspend time format:
* 0-19: beacon interval in usec (time before exec.)
* 20-23: 0
* 24-31: number of beacons (suspend between channels)
*/
extra = (suspend_time / interval) << 24;
scan_suspend_time = 0xFF0FFFFF &
(extra | ((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
}
if (priv->scan_request->n_ssids) {
int i, p = 0;
IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
for (i = 0; i < priv->scan_request->n_ssids; i++) {
/* always does wildcard anyway */
if (!priv->scan_request->ssids[i].ssid_len)
continue;
scan->direct_scan[p].id = WLAN_EID_SSID;
scan->direct_scan[p].len =
priv->scan_request->ssids[i].ssid_len;
memcpy(scan->direct_scan[p].ssid,
priv->scan_request->ssids[i].ssid,
priv->scan_request->ssids[i].ssid_len);
n_probes++;
p++;
}
is_active = true;
} else
IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
/* We don't build a direct scan probe request; the uCode will do
* that based on the direct_mask added to each channel entry */
scan->tx_cmd.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;
/* flags + rate selection */
if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
scan->good_CRC_th = 0;
band = IEEE80211_BAND_2GHZ;
} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
/*
* If active scaning is requested but a certain channel
* is marked passive, we can do active scanning if we
* detect transmissions.
*/
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
band = IEEE80211_BAND_5GHZ;
} else {
IWL_WARN(priv, "Invalid scan band count\n");
goto done;
}
scan->tx_cmd.len = cpu_to_le16(
iwl_fill_probe_req(priv,
(struct ieee80211_mgmt *)scan->data,
priv->scan_request->ie,
priv->scan_request->ie_len,
IWL_MAX_SCAN_SIZE - sizeof(*scan)));
/* select Rx antennas */
scan->flags |= iwl3945_get_antenna_flags(priv);
if (iwl_is_monitor_mode(priv))
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
scan->channel_count =
iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
if (scan->channel_count == 0) {
IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
goto done;
}
cmd.len += le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct iwl3945_scan_channel);
cmd.data = scan;
scan->len = cpu_to_le16(cmd.len);
set_bit(STATUS_SCAN_HW, &priv->status);
rc = iwl_send_cmd_sync(priv, &cmd);
if (rc)
goto done;
queue_delayed_work(priv->workqueue, &priv->scan_check,
IWL_SCAN_CHECK_WATCHDOG);
mutex_unlock(&priv->mutex);
return;
done:
/* can not perform scan make sure we clear scanning
* bits from status so next scan request can be performed.
* if we dont clear scanning status bit here all next scan
* will fail
*/
clear_bit(STATUS_SCAN_HW, &priv->status);
clear_bit(STATUS_SCANNING, &priv->status);
/* inform mac80211 scan aborted */
queue_work(priv->workqueue, &priv->scan_completed);
mutex_unlock(&priv->mutex);
}
static void iwl3945_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);
__iwl3945_up(priv);
mutex_unlock(&priv->mutex);
}
static void iwl3945_bg_restart(struct work_struct *data)
{
struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
mutex_lock(&priv->mutex);
priv->vif = NULL;
priv->is_open = 0;
mutex_unlock(&priv->mutex);
iwl3945_down(priv);
ieee80211_restart_hw(priv->hw);
} else {
iwl3945_down(priv);
queue_work(priv->workqueue, &priv->up);
}
}
static void iwl3945_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);
iwl3945_rx_replenish(priv);
mutex_unlock(&priv->mutex);
}
#define IWL_DELAY_NEXT_SCAN (HZ*2)
void iwl3945_post_associate(struct iwl_priv *priv)
{
int rc = 0;
struct ieee80211_conf *conf = NULL;
if (priv->iw_mode == NL80211_IFTYPE_AP) {
IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
return;
}
IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
priv->assoc_id, priv->active_rxon.bssid_addr);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if (!priv->vif || !priv->is_open)
return;
iwl_scan_cancel_timeout(priv, 200);
conf = ieee80211_get_hw_conf(priv->hw);
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv);
memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
iwl_setup_rxon_timing(priv);
rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing), &priv->rxon_timing);
if (rc)
IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
priv->assoc_id, priv->beacon_int);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
}
iwlcore_commit_rxon(priv);
switch (priv->iw_mode) {
case NL80211_IFTYPE_STATION:
iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
break;
case NL80211_IFTYPE_ADHOC:
priv->assoc_id = 1;
iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
iwl3945_sync_sta(priv, IWL_STA_ID,
(priv->band == IEEE80211_BAND_5GHZ) ?
IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
CMD_ASYNC);
iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
iwl3945_send_beacon_cmd(priv);
break;
default:
IWL_ERR(priv, "%s Should not be called in %d mode\n",
__func__, priv->iw_mode);
break;
}
iwl_activate_qos(priv, 0);
/* we have just associated, don't start scan too early */
priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
#define UCODE_READY_TIMEOUT (2 * HZ)
static int iwl3945_mac_start(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211(priv, "enter\n");
/* we should be verifying the device is ready to be opened */
mutex_lock(&priv->mutex);
/* 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 = iwl3945_read_ucode(priv);
if (ret) {
IWL_ERR(priv, "Could not read microcode: %d\n", ret);
mutex_unlock(&priv->mutex);
goto out_release_irq;
}
}
ret = __iwl3945_up(priv);
mutex_unlock(&priv->mutex);
if (ret)
goto out_release_irq;
IWL_DEBUG_INFO(priv, "Start UP work.\n");
/* 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_ERR(priv,
"Wait for START_ALIVE timeout after %dms.\n",
jiffies_to_msecs(UCODE_READY_TIMEOUT));
ret = -ETIMEDOUT;
goto out_release_irq;
}
}
/* ucode is running and will send rfkill notifications,
* no need to poll the killswitch state anymore */
cancel_delayed_work(&priv->rfkill_poll);
iwl_led_start(priv);
priv->is_open = 1;
IWL_DEBUG_MAC80211(priv, "leave\n");
return 0;
out_release_irq:
priv->is_open = 0;
IWL_DEBUG_MAC80211(priv, "leave - failed\n");
return ret;
}
static void iwl3945_mac_stop(struct ieee80211_hw *hw)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (!priv->is_open) {
IWL_DEBUG_MAC80211(priv, "leave - skip\n");
return;
}
priv->is_open = 0;
if (iwl_is_ready_rf(priv)) {
/* stop mac, cancel any scan request and clear
* RXON_FILTER_ASSOC_MSK BIT
*/
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
mutex_unlock(&priv->mutex);
}
iwl3945_down(priv);
flush_workqueue(priv->workqueue);
/* start polling the killswitch state again */
queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
round_jiffies_relative(2 * HZ));
IWL_DEBUG_MAC80211(priv, "leave\n");
}
static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct iwl_priv *priv = hw->priv;
IWL_DEBUG_MAC80211(priv, "enter\n");
IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
if (iwl3945_tx_skb(priv, skb))
dev_kfree_skb_any(skb);
IWL_DEBUG_MAC80211(priv, "leave\n");
return NETDEV_TX_OK;
}
void iwl3945_config_ap(struct iwl_priv *priv)
{
int rc = 0;
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
/* The following should be done only at AP bring up */
if (!(iwl_is_associated(priv))) {
/* RXON - unassoc (to set timing command) */
priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv);
/* RXON Timing */
memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
iwl_setup_rxon_timing(priv);
rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
sizeof(priv->rxon_timing),
&priv->rxon_timing);
if (rc)
IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
"Attempting to continue.\n");
/* FIXME: what should be the assoc_id for AP? */
priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_PREAMBLE_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_PREAMBLE_MSK;
if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
if (priv->assoc_capability &
WLAN_CAPABILITY_SHORT_SLOT_TIME)
priv->staging_rxon.flags |=
RXON_FLG_SHORT_SLOT_MSK;
else
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_SLOT_MSK;
if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
priv->staging_rxon.flags &=
~RXON_FLG_SHORT_SLOT_MSK;
}
/* restore RXON assoc */
priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
iwlcore_commit_rxon(priv);
iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
}
iwl3945_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 iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct iwl_priv *priv = hw->priv;
const u8 *addr;
int ret = 0;
u8 sta_id = IWL_INVALID_STATION;
u8 static_key;
IWL_DEBUG_MAC80211(priv, "enter\n");
if (iwl3945_mod_params.sw_crypto) {
IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
addr = sta ? sta->addr : iwl_bcast_addr;
static_key = !iwl_is_associated(priv);
if (!static_key) {
sta_id = iwl_find_station(priv, addr);
if (sta_id == IWL_INVALID_STATION) {
IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
addr);
return -EINVAL;
}
}
mutex_lock(&priv->mutex);
iwl_scan_cancel_timeout(priv, 100);
mutex_unlock(&priv->mutex);
switch (cmd) {
case SET_KEY:
if (static_key)
ret = iwl3945_set_static_key(priv, key);
else
ret = iwl3945_set_dynamic_key(priv, key, sta_id);
IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
break;
case DISABLE_KEY:
if (static_key)
ret = iwl3945_remove_static_key(priv);
else
ret = iwl3945_clear_sta_key_info(priv, sta_id);
IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
break;
default:
ret = -EINVAL;
}
IWL_DEBUG_MAC80211(priv, "leave\n");
return ret;
}
/*****************************************************************************
*
* 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.
*
* The debug_level being managed using sysfs below is a per device debug
* level that is used instead of the global debug level if it (the per
* device debug level) is set.
*/
static ssize_t show_debug_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
}
static ssize_t store_debug_level(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = strict_strtoul(buf, 0, &val);
if (ret)
IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
else {
priv->debug_level = val;
if (iwl_alloc_traffic_mem(priv))
IWL_ERR(priv,
"Not enough memory to generate traffic log\n");
}
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
show_debug_level, store_debug_level);
#endif /* CONFIG_IWLWIFI_DEBUG */
static ssize_t show_temperature(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
if (!iwl_is_alive(priv))
return -EAGAIN;
return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
}
static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
static ssize_t show_tx_power(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
}
static ssize_t store_tx_power(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
char *p = (char *)buf;
u32 val;
val = simple_strtoul(p, &p, 10);
if (p == buf)
IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
else
iwl3945_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 = dev_get_drvdata(d);
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 = dev_get_drvdata(d);
u32 flags = simple_strtoul(buf, NULL, 0);
mutex_lock(&priv->mutex);
if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
/* Cancel any currently running scans... */
if (iwl_scan_cancel_timeout(priv, 100))
IWL_WARN(priv, "Could not cancel scan.\n");
else {
IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
flags);
priv->staging_rxon.flags = cpu_to_le32(flags);
iwlcore_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 = dev_get_drvdata(d);
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 = dev_get_drvdata(d);
u32 filter_flags = simple_strtoul(buf, NULL, 0);
mutex_lock(&priv->mutex);
if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
/* Cancel any currently running scans... */
if (iwl_scan_cancel_timeout(priv, 100))
IWL_WARN(priv, "Could not cancel scan.\n");
else {
IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
"0x%04X\n", filter_flags);
priv->staging_rxon.filter_flags =
cpu_to_le32(filter_flags);
iwlcore_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_IWL3945_SPECTRUM_MEASUREMENT
static ssize_t show_measurement(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
struct iwl_spectrum_notification measure_report;
u32 size = sizeof(measure_report), len = 0, ofs = 0;
u8 *data = (u8 *)&measure_report;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
if (!(priv->measurement_status & MEASUREMENT_READY)) {
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
memcpy(&measure_report, &priv->measure_report, size);
priv->measurement_status = 0;
spin_unlock_irqrestore(&priv->lock, flags);
while (size && (PAGE_SIZE - len)) {
hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
PAGE_SIZE - len, 1);
len = strlen(buf);
if (PAGE_SIZE - len)
buf[len++] = '\n';
ofs += 16;
size -= min(size, 16U);
}
return len;
}
static ssize_t store_measurement(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
struct ieee80211_measurement_params params = {
.channel = le16_to_cpu(priv->active_rxon.channel),
.start_time = cpu_to_le64(priv->last_tsf),
.duration = cpu_to_le16(1),
};
u8 type = IWL_MEASURE_BASIC;
u8 buffer[32];
u8 channel;
if (count) {
char *p = buffer;
strncpy(buffer, buf, min(sizeof(buffer), count));
channel = simple_strtoul(p, NULL, 0);
if (channel)
params.channel = channel;
p = buffer;
while (*p && *p != ' ')
p++;
if (*p)
type = simple_strtoul(p + 1, NULL, 0);
}
IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
"channel %d (for '%s')\n", type, params.channel, buf);
iwl3945_get_measurement(priv, &params, type);
return count;
}
static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
show_measurement, store_measurement);
#endif /* CONFIG_IWL3945_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 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 iwl3945_notif_statistics);
u32 len = 0, ofs = 0;
u8 *data = (u8 *)&priv->statistics_39;
int rc = 0;
if (!iwl_is_alive(priv))
return -EAGAIN;
mutex_lock(&priv->mutex);
rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
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", iwl3945_mod_params.antenna);
}
static ssize_t store_antenna(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
int ant;
if (count == 0)
return 0;
if (sscanf(buf, "%1i", &ant) != 1) {
IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
return count;
}
if ((ant >= 0) && (ant <= 2)) {
IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
} else
IWL_DEBUG_INFO(priv, "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 = dev_get_drvdata(d);
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)
{
struct iwl_priv *priv = dev_get_drvdata(d);
char *p = (char *)buf;
if (p[0] == '1')
iwl3945_dump_nic_error_log(priv);
return strnlen(buf, count);
}
static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
/*****************************************************************************
*
* driver setup and tear down
*
*****************************************************************************/
static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
{
priv->workqueue = create_singlethread_workqueue(DRV_NAME);
init_waitqueue_head(&priv->wait_command_queue);
INIT_WORK(&priv->up, iwl3945_bg_up);
INIT_WORK(&priv->restart, iwl3945_bg_restart);
INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
iwl3945_hw_setup_deferred_work(priv);
tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
iwl3945_irq_tasklet, (unsigned long)priv);
}
static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
{
iwl3945_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_work_sync(&priv->beacon_update);
}
static struct attribute *iwl3945_sysfs_entries[] = {
&dev_attr_antenna.attr,
&dev_attr_channels.attr,
&dev_attr_dump_errors.attr,
&dev_attr_flags.attr,
&dev_attr_filter_flags.attr,
#ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
&dev_attr_measurement.attr,
#endif
&dev_attr_retry_rate.attr,
&dev_attr_statistics.attr,
&dev_attr_status.attr,
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
#ifdef CONFIG_IWLWIFI_DEBUG
&dev_attr_debug_level.attr,
#endif
NULL
};
static struct attribute_group iwl3945_attribute_group = {
.name = NULL, /* put in device directory */
.attrs = iwl3945_sysfs_entries,
};
static struct ieee80211_ops iwl3945_hw_ops = {
.tx = iwl3945_mac_tx,
.start = iwl3945_mac_start,
.stop = iwl3945_mac_stop,
.add_interface = iwl_mac_add_interface,
.remove_interface = iwl_mac_remove_interface,
.config = iwl_mac_config,
.configure_filter = iwl_configure_filter,
.set_key = iwl3945_mac_set_key,
.get_tx_stats = iwl_mac_get_tx_stats,
.conf_tx = iwl_mac_conf_tx,
.reset_tsf = iwl_mac_reset_tsf,
.bss_info_changed = iwl_bss_info_changed,
.hw_scan = iwl_mac_hw_scan
};
static int iwl3945_init_drv(struct iwl_priv *priv)
{
int ret;
struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
priv->retry_rate = 1;
priv->ibss_beacon = NULL;
spin_lock_init(&priv->sta_lock);
spin_lock_init(&priv->hcmd_lock);
INIT_LIST_HEAD(&priv->free_frames);
mutex_init(&priv->mutex);
/* Clear the driver's (not device's) station table */
iwl_clear_stations_table(priv);
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->band = IEEE80211_BAND_2GHZ;
priv->iw_mode = NL80211_IFTYPE_STATION;
priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
iwl_reset_qos(priv);
priv->qos_data.qos_active = 0;
priv->qos_data.qos_cap.val = 0;
priv->rates_mask = IWL_RATES_MASK;
priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
eeprom->version);
ret = -EINVAL;
goto err;
}
ret = iwl_init_channel_map(priv);
if (ret) {
IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
goto err;
}
/* Set up txpower settings in driver for all channels */
if (iwl3945_txpower_set_from_eeprom(priv)) {
ret = -EIO;
goto err_free_channel_map;
}
ret = iwlcore_init_geos(priv);
if (ret) {
IWL_ERR(priv, "initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
iwl3945_init_hw_rates(priv, priv->ieee_rates);
return 0;
err_free_channel_map:
iwl_free_channel_map(priv);
err:
return ret;
}
static int iwl3945_setup_mac(struct iwl_priv *priv)
{
int ret;
struct ieee80211_hw *hw = priv->hw;
hw->rate_control_algorithm = "iwl-3945-rs";
hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
/* Tell mac80211 our characteristics */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM |
IEEE80211_HW_SPECTRUM_MGMT;
if (!priv->cfg->broken_powersave)
hw->flags |= IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC);
hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
WIPHY_FLAG_DISABLE_BEACON_HINTS;
hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
/* we create the 802.11 header and a zero-length SSID element */
hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
/* Default value; 4 EDCA QOS priorities */
hw->queues = 4;
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];
ret = ieee80211_register_hw(priv->hw);
if (ret) {
IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
return ret;
}
priv->mac80211_registered = 1;
return 0;
}
static int iwl3945_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);
struct iwl3945_eeprom *eeprom;
unsigned long flags;
/***********************
* 1. Allocating HW data
* ********************/
/* mac80211 allocates memory for this device instance, including
* space for this driver's private structure */
hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
if (hw == NULL) {
printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
err = -ENOMEM;
goto out;
}
priv = hw->priv;
SET_IEEE80211_DEV(hw, &pdev->dev);
/*
* Disabling hardware scan means that mac80211 will perform scans
* "the hard way", rather than using device's scan.
*/
if (iwl3945_mod_params.disable_hw_scan) {
IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
iwl3945_hw_ops.hw_scan = NULL;
}
IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
priv->cfg = cfg;
priv->pci_dev = pdev;
priv->inta_mask = CSR_INI_SET_MASK;
#ifdef CONFIG_IWLWIFI_DEBUG
atomic_set(&priv->restrict_refcnt, 0);
#endif
if (iwl_alloc_traffic_mem(priv))
IWL_ERR(priv, "Not enough memory to generate traffic log\n");
/***************************
* 2. Initializing PCI bus
* *************************/
if (pci_enable_device(pdev)) {
err = -ENODEV;
goto out_ieee80211_free_hw;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
IWL_WARN(priv, "No suitable DMA available.\n");
goto out_pci_disable_device;
}
pci_set_drvdata(pdev, priv);
err = pci_request_regions(pdev, DRV_NAME);
if (err)
goto out_pci_disable_device;
/***********************
* 3. Read REV Register
* ********************/
priv->hw_base = pci_iomap(pdev, 0, 0);
if (!priv->hw_base) {
err = -ENODEV;
goto out_pci_release_regions;
}
IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
(unsigned long long) pci_resource_len(pdev, 0));
IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
/* 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);
/* these spin locks will be used in apm_ops.init and EEPROM access
* we should init now
*/
spin_lock_init(&priv->reg_lock);
spin_lock_init(&priv->lock);
/***********************
* 4. Read EEPROM
* ********************/
/* Read the EEPROM */
err = iwl_eeprom_init(priv);
if (err) {
IWL_ERR(priv, "Unable to init EEPROM\n");
goto out_iounmap;
}
/* MAC Address location in EEPROM same for 3945/4965 */
eeprom = (struct iwl3945_eeprom *)priv->eeprom;
memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
/***********************
* 5. Setup HW Constants
* ********************/
/* Device-specific setup */
if (iwl3945_hw_set_hw_params(priv)) {
IWL_ERR(priv, "failed to set hw settings\n");
goto out_eeprom_free;
}
/***********************
* 6. Setup priv
* ********************/
err = iwl3945_init_drv(priv);
if (err) {
IWL_ERR(priv, "initializing driver failed\n");
goto out_unset_hw_params;
}
IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
priv->cfg->name);
/***********************
* 7. Setup Services
* ********************/
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
pci_enable_msi(priv->pci_dev);
err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
IRQF_SHARED, DRV_NAME, priv);
if (err) {
IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
goto out_disable_msi;
}
err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
if (err) {
IWL_ERR(priv, "failed to create sysfs device attributes\n");
goto out_release_irq;
}
iwl_set_rxon_channel(priv,
&priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
iwl3945_setup_deferred_work(priv);
iwl3945_setup_rx_handlers(priv);
iwl_power_initialize(priv);
/*********************************
* 8. Setup and Register mac80211
* *******************************/
iwl_enable_interrupts(priv);
err = iwl3945_setup_mac(priv);
if (err)
goto out_remove_sysfs;
err = iwl_dbgfs_register(priv, DRV_NAME);
if (err)
IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
/* Start monitoring the killswitch */
queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2 * HZ);
return 0;
out_remove_sysfs:
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
out_release_irq:
free_irq(priv->pci_dev->irq, priv);
out_disable_msi:
pci_disable_msi(priv->pci_dev);
iwlcore_free_geos(priv);
iwl_free_channel_map(priv);
out_unset_hw_params:
iwl3945_unset_hw_params(priv);
out_eeprom_free:
iwl_eeprom_free(priv);
out_iounmap:
pci_iounmap(pdev, priv->hw_base);
out_pci_release_regions:
pci_release_regions(pdev);
out_pci_disable_device:
pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
out_ieee80211_free_hw:
iwl_free_traffic_mem(priv);
ieee80211_free_hw(priv->hw);
out:
return err;
}
static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
{
struct iwl_priv *priv = pci_get_drvdata(pdev);
unsigned long flags;
if (!priv)
return;
IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
iwl_dbgfs_unregister(priv);
set_bit(STATUS_EXIT_PENDING, &priv->status);
if (priv->mac80211_registered) {
ieee80211_unregister_hw(priv->hw);
priv->mac80211_registered = 0;
} else {
iwl3945_down(priv);
}
/*
* Make sure device is reset to low power before unloading driver.
* This may be redundant with iwl_down(), but there are paths to
* run iwl_down() without calling apm_ops.stop(), and there are
* paths to avoid running iwl_down() at all before leaving driver.
* This (inexpensive) call *makes sure* device is reset.
*/
priv->cfg->ops->lib->apm_ops.stop(priv);
/* make sure we flush any pending irq or
* tasklet for the driver
*/
spin_lock_irqsave(&priv->lock, flags);
iwl_disable_interrupts(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl_synchronize_irq(priv);
sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
cancel_delayed_work_sync(&priv->rfkill_poll);
iwl3945_dealloc_ucode_pci(priv);
if (priv->rxq.bd)
iwl3945_rx_queue_free(priv, &priv->rxq);
iwl3945_hw_txq_ctx_free(priv);
iwl3945_unset_hw_params(priv);
iwl_clear_stations_table(priv);
/*netif_stop_queue(dev); */
flush_workqueue(priv->workqueue);
/* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
* priv->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
iwl_free_traffic_mem(priv);
free_irq(pdev->irq, priv);
pci_disable_msi(pdev);
pci_iounmap(pdev, priv->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
iwl_free_channel_map(priv);
iwlcore_free_geos(priv);
kfree(priv->scan);
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);
ieee80211_free_hw(priv->hw);
}
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
static struct pci_driver iwl3945_driver = {
.name = DRV_NAME,
.id_table = iwl3945_hw_card_ids,
.probe = iwl3945_pci_probe,
.remove = __devexit_p(iwl3945_pci_remove),
#ifdef CONFIG_PM
.suspend = iwl_pci_suspend,
.resume = iwl_pci_resume,
#endif
};
static int __init iwl3945_init(void)
{
int ret;
printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
ret = iwl3945_rate_control_register();
if (ret) {
printk(KERN_ERR DRV_NAME
"Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = pci_register_driver(&iwl3945_driver);
if (ret) {
printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
goto error_register;
}
return ret;
error_register:
iwl3945_rate_control_unregister();
return ret;
}
static void __exit iwl3945_exit(void)
{
pci_unregister_driver(&iwl3945_driver);
iwl3945_rate_control_unregister();
}
MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto,
"using software crypto (default 1 [software])\n");
#ifdef CONFIG_IWLWIFI_DEBUG
module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif
module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
int, S_IRUGO);
MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
module_exit(iwl3945_exit);
module_init(iwl3945_init);
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