*
* GPL LICENSE SUMMARY
*
- * Copyright(c) 2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
*
* 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
* in the file called LICENSE.GPL.
*
* Contact Information:
- * Tomas Winkler <tomas.winkler@intel.com>
+ * Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*****************************************************************************/
-#include <net/mac80211.h>
+#include <linux/slab.h>
+#include <linux/types.h>
#include <linux/etherdevice.h>
+#include <net/mac80211.h>
#include "iwl-eeprom.h"
#include "iwl-dev.h"
#define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
#define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
-/* For faster active scanning, scan will move to the next channel if fewer than
- * PLCP_QUIET_THRESH packets are heard on this channel within
- * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
- * time if it's a quiet channel (nothing responded to our probe, and there's
- * no other traffic).
- * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
-#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
-#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(10) /* msec */
-
/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
* Must be set longer than active dwell time.
* For the most reliable scan, set > AP beacon interval (typically 100msec). */
#define IWL_PASSIVE_DWELL_BASE (100)
#define IWL_CHANNEL_TUNE_TIME 5
-#define IWL_SCAN_PROBE_MASK(n) cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
-
-
-static int scan_tx_ant[3] = {
- RATE_MCS_ANT_A_MSK, RATE_MCS_ANT_B_MSK, RATE_MCS_ANT_C_MSK
-};
-
-
-
-static int iwl_is_empty_essid(const char *essid, int essid_len)
-{
- /* Single white space is for Linksys APs */
- if (essid_len == 1 && essid[0] == ' ')
- return 1;
-
- /* Otherwise, if the entire essid is 0, we assume it is hidden */
- while (essid_len) {
- essid_len--;
- if (essid[essid_len] != '\0')
- return 0;
- }
-
- return 1;
-}
-
-
-static const char *iwl_escape_essid(const char *essid, u8 essid_len)
-{
- static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
- const char *s = essid;
- char *d = escaped;
-
- if (iwl_is_empty_essid(essid, essid_len)) {
- memcpy(escaped, "<hidden>", sizeof("<hidden>"));
- return escaped;
- }
-
- essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
- while (essid_len--) {
- if (*s == '\0') {
- *d++ = '\\';
- *d++ = '0';
- s++;
- } else
- *d++ = *s++;
- }
- *d = '\0';
- return escaped;
-}
/**
* iwl_scan_cancel - Cancel any currently executing HW scan
if (test_bit(STATUS_SCANNING, &priv->status)) {
if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
- IWL_DEBUG_SCAN("Queuing scan abort.\n");
+ IWL_DEBUG_SCAN(priv, "Queuing scan abort.\n");
set_bit(STATUS_SCAN_ABORTING, &priv->status);
queue_work(priv->workqueue, &priv->abort_scan);
} else
- IWL_DEBUG_SCAN("Scan abort already in progress.\n");
+ IWL_DEBUG_SCAN(priv, "Scan abort already in progress.\n");
return test_bit(STATUS_SCANNING, &priv->status);
}
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
int ret = 0;
- struct iwl_rx_packet *res;
+ struct iwl_rx_packet *pkt;
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_ABORT_CMD,
- .meta.flags = CMD_WANT_SKB,
+ .flags = CMD_WANT_SKB,
};
/* If there isn't a scan actively going on in the hardware
return ret;
}
- res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
- if (res->u.status != CAN_ABORT_STATUS) {
+ pkt = (struct iwl_rx_packet *)cmd.reply_page;
+ if (pkt->u.status != CAN_ABORT_STATUS) {
/* The scan abort will return 1 for success or
* 2 for "failure". A failure condition can be
* due to simply not being in an active scan which
* can occur if we send the scan abort before we
* the microcode has notified us that a scan is
* completed. */
- IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
+ IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", pkt->u.status);
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
clear_bit(STATUS_SCAN_HW, &priv->status);
}
- priv->alloc_rxb_skb--;
- dev_kfree_skb_any(cmd.meta.u.skb);
+ iwl_free_pages(priv, cmd.reply_page);
return ret;
}
-
/* Service response to REPLY_SCAN_CMD (0x80) */
static void iwl_rx_reply_scan(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
- struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_scanreq_notification *notif =
(struct iwl_scanreq_notification *)pkt->u.raw;
- IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
+ IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status);
#endif
}
static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
- struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_scanstart_notification *notif =
(struct iwl_scanstart_notification *)pkt->u.raw;
priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
- IWL_DEBUG_SCAN("Scan start: "
+ IWL_DEBUG_SCAN(priv, "Scan start: "
"%d [802.11%s] "
"(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
notif->channel,
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
- struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_scanresults_notification *notif =
(struct iwl_scanresults_notification *)pkt->u.raw;
- IWL_DEBUG_SCAN("Scan ch.res: "
+ IWL_DEBUG_SCAN(priv, "Scan ch.res: "
"%d [802.11%s] "
"(TSF: 0x%08X:%08X) - %d "
- "elapsed=%lu usec (%dms since last)\n",
+ "elapsed=%lu usec\n",
notif->channel,
notif->band ? "bg" : "a",
le32_to_cpu(notif->tsf_high),
le32_to_cpu(notif->tsf_low),
le32_to_cpu(notif->statistics[0]),
- le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
- jiffies_to_msecs(elapsed_jiffies
- (priv->last_scan_jiffies, jiffies)));
+ le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf);
#endif
- priv->last_scan_jiffies = jiffies;
- priv->next_scan_jiffies = 0;
+ if (!priv->is_internal_short_scan)
+ priv->next_scan_jiffies = 0;
}
/* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
- struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
- IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
+ IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
scan_notif->scanned_channels,
scan_notif->tsf_low,
scan_notif->tsf_high, scan_notif->status);
/* The HW is no longer scanning */
clear_bit(STATUS_SCAN_HW, &priv->status);
- /* The scan completion notification came in, so kill that timer... */
- cancel_delayed_work(&priv->scan_check);
-
- IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
+ IWL_DEBUG_INFO(priv, "Scan pass on %sGHz took %dms\n",
(priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
"2.4" : "5.2",
jiffies_to_msecs(elapsed_jiffies
* then we reset the scan state machine and terminate,
* re-queuing another scan if one has been requested */
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
- IWL_DEBUG_INFO("Aborted scan completed.\n");
+ IWL_DEBUG_INFO(priv, "Aborted scan completed.\n");
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
} else {
/* If there are more bands on this scan pass reschedule */
goto reschedule;
}
- priv->last_scan_jiffies = jiffies;
- priv->next_scan_jiffies = 0;
- IWL_DEBUG_INFO("Setting scan to off\n");
+ if (!priv->is_internal_short_scan)
+ priv->next_scan_jiffies = 0;
+
+ IWL_DEBUG_INFO(priv, "Setting scan to off\n");
clear_bit(STATUS_SCANNING, &priv->status);
- IWL_DEBUG_INFO("Scan took %dms\n",
+ IWL_DEBUG_INFO(priv, "Scan took %dms\n",
jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
queue_work(priv->workqueue, &priv->scan_completed);
}
EXPORT_SYMBOL(iwl_setup_rx_scan_handlers);
-static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band,
- u8 n_probes)
+inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
+ enum ieee80211_band band,
+ u8 n_probes)
{
if (band == IEEE80211_BAND_5GHZ)
return IWL_ACTIVE_DWELL_TIME_52 +
return IWL_ACTIVE_DWELL_TIME_24 +
IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
}
+EXPORT_SYMBOL(iwl_get_active_dwell_time);
-static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band)
+u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
+ enum ieee80211_band band)
{
u16 passive = (band == IEEE80211_BAND_2GHZ) ?
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
return passive;
}
+EXPORT_SYMBOL(iwl_get_passive_dwell_time);
+
+static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
+ enum ieee80211_band band,
+ struct iwl_scan_channel *scan_ch)
+{
+ const struct ieee80211_supported_band *sband;
+ const struct iwl_channel_info *ch_info;
+ u16 passive_dwell = 0;
+ u16 active_dwell = 0;
+ int i, added = 0;
+ u16 channel = 0;
+
+ sband = iwl_get_hw_mode(priv, band);
+ if (!sband) {
+ IWL_ERR(priv, "invalid band\n");
+ return added;
+ }
+
+ active_dwell = iwl_get_active_dwell_time(priv, band, 0);
+ passive_dwell = iwl_get_passive_dwell_time(priv, band);
+
+ if (passive_dwell <= active_dwell)
+ passive_dwell = active_dwell + 1;
+
+ /* only scan single channel, good enough to reset the RF */
+ /* pick the first valid not in-use channel */
+ if (band == IEEE80211_BAND_5GHZ) {
+ for (i = 14; i < priv->channel_count; i++) {
+ if (priv->channel_info[i].channel !=
+ le16_to_cpu(priv->staging_rxon.channel)) {
+ channel = priv->channel_info[i].channel;
+ ch_info = iwl_get_channel_info(priv,
+ band, channel);
+ if (is_channel_valid(ch_info))
+ break;
+ }
+ }
+ } else {
+ for (i = 0; i < 14; i++) {
+ if (priv->channel_info[i].channel !=
+ le16_to_cpu(priv->staging_rxon.channel)) {
+ channel =
+ priv->channel_info[i].channel;
+ ch_info = iwl_get_channel_info(priv,
+ band, channel);
+ if (is_channel_valid(ch_info))
+ break;
+ }
+ }
+ }
+ if (channel) {
+ scan_ch->channel = cpu_to_le16(channel);
+ scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+ scan_ch->active_dwell = cpu_to_le16(active_dwell);
+ scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+ /* Set txpower levels to defaults */
+ scan_ch->dsp_atten = 110;
+ if (band == IEEE80211_BAND_5GHZ)
+ scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+ else
+ scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+ added++;
+ } else
+ IWL_ERR(priv, "no valid channel found\n");
+ return added;
+}
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
enum ieee80211_band band,
u8 is_active, u8 n_probes,
struct iwl_scan_channel *scan_ch)
{
- const struct ieee80211_channel *channels = NULL;
+ struct ieee80211_channel *chan;
const struct ieee80211_supported_band *sband;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
if (!sband)
return 0;
- channels = sband->channels;
-
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 < sband->n_channels; i++) {
- if (channels[i].flags & IEEE80211_CHAN_DISABLED)
+ for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
+ chan = priv->scan_request->channels[i];
+
+ if (chan->band != band)
continue;
- channel =
- ieee80211_frequency_to_channel(channels[i].center_freq);
+ channel = ieee80211_frequency_to_channel(chan->center_freq);
scan_ch->channel = cpu_to_le16(channel);
ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info)) {
- IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
+ IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
- (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
+ (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
- IWL_DEBUG_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n",
+ IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
channel, le32_to_cpu(scan_ch->type),
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
"ACTIVE" : "PASSIVE",
added++;
}
- IWL_DEBUG_SCAN("total channels to scan %d \n", added);
+ IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
return added;
}
void iwl_init_scan_params(struct iwl_priv *priv)
{
+ u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1;
if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ])
- priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = RATE_MCS_ANT_INIT_IND;
+ priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ])
- priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = RATE_MCS_ANT_INIT_IND;
+ priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
+}
+EXPORT_SYMBOL(iwl_init_scan_params);
+
+static int iwl_scan_initiate(struct iwl_priv *priv)
+{
+ WARN_ON(!mutex_is_locked(&priv->mutex));
+
+ IWL_DEBUG_INFO(priv, "Starting scan...\n");
+ set_bit(STATUS_SCANNING, &priv->status);
+ priv->is_internal_short_scan = false;
+ priv->scan_start = jiffies;
+ priv->scan_pass_start = priv->scan_start;
+
+ queue_work(priv->workqueue, &priv->request_scan);
+
+ return 0;
}
-int iwl_scan_initiate(struct iwl_priv *priv)
+#define IWL_DELAY_NEXT_SCAN (HZ*2)
+
+int iwl_mac_hw_scan(struct ieee80211_hw *hw,
+ struct cfg80211_scan_request *req)
{
+ unsigned long flags;
+ struct iwl_priv *priv = hw->priv;
+ int ret, i;
+
+ IWL_DEBUG_MAC80211(priv, "enter\n");
+
+ mutex_lock(&priv->mutex);
+ spin_lock_irqsave(&priv->lock, flags);
+
if (!iwl_is_ready_rf(priv)) {
- IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
- return -EIO;
+ ret = -EIO;
+ IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
+ goto out_unlock;
}
if (test_bit(STATUS_SCANNING, &priv->status)) {
- IWL_DEBUG_SCAN("Scan already in progress.\n");
- return -EAGAIN;
+ IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
+ ret = -EAGAIN;
+ goto out_unlock;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
- IWL_DEBUG_SCAN("Scan request while abort pending\n");
- return -EAGAIN;
+ IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
+ ret = -EAGAIN;
+ goto out_unlock;
}
- IWL_DEBUG_INFO("Starting scan...\n");
- if (priv->cfg->sku & IWL_SKU_G)
- priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
- if (priv->cfg->sku & IWL_SKU_A)
+ /* We don't schedule scan within next_scan_jiffies period.
+ * Avoid scanning during possible EAPOL exchange, return
+ * success immediately.
+ */
+ if (priv->next_scan_jiffies &&
+ time_after(priv->next_scan_jiffies, jiffies)) {
+ IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
+ queue_work(priv->workqueue, &priv->scan_completed);
+ ret = 0;
+ goto out_unlock;
+ }
+
+ priv->scan_bands = 0;
+ for (i = 0; i < req->n_channels; i++)
+ priv->scan_bands |= BIT(req->channels[i]->band);
+
+ priv->scan_request = req;
+
+ ret = iwl_scan_initiate(priv);
+
+ IWL_DEBUG_MAC80211(priv, "leave\n");
+
+out_unlock:
+ spin_unlock_irqrestore(&priv->lock, flags);
+ mutex_unlock(&priv->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(iwl_mac_hw_scan);
+
+/*
+ * internal short scan, this function should only been called while associated.
+ * It will reset and tune the radio to prevent possible RF related problem
+ */
+void iwl_internal_short_hw_scan(struct iwl_priv *priv)
+{
+ queue_work(priv->workqueue, &priv->start_internal_scan);
+}
+
+static void iwl_bg_start_internal_scan(struct work_struct *work)
+{
+ struct iwl_priv *priv =
+ container_of(work, struct iwl_priv, start_internal_scan);
+
+ mutex_lock(&priv->mutex);
+
+ if (!iwl_is_ready_rf(priv)) {
+ IWL_DEBUG_SCAN(priv, "not ready or exit pending\n");
+ goto unlock;
+ }
+
+ if (test_bit(STATUS_SCANNING, &priv->status)) {
+ IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
+ goto unlock;
+ }
+
+ if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
+ IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
+ goto unlock;
+ }
+
+ priv->scan_bands = 0;
+ if (priv->band == IEEE80211_BAND_5GHZ)
priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
- set_bit(STATUS_SCANNING, &priv->status);
- priv->scan_start = jiffies;
- priv->scan_pass_start = priv->scan_start;
+ else
+ priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
+ IWL_DEBUG_SCAN(priv, "Start internal short scan...\n");
+ set_bit(STATUS_SCANNING, &priv->status);
+ priv->is_internal_short_scan = true;
queue_work(priv->workqueue, &priv->request_scan);
-
- return 0;
+ unlock:
+ mutex_unlock(&priv->mutex);
}
-EXPORT_SYMBOL(iwl_scan_initiate);
#define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
-static void iwl_bg_scan_check(struct work_struct *data)
+void iwl_bg_scan_check(struct work_struct *data)
{
struct iwl_priv *priv =
container_of(data, struct iwl_priv, scan_check.work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_SCANNING, &priv->status) ||
test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
- IWL_DEBUG(IWL_DL_SCAN, "Scan completion watchdog resetting "
+ IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting "
"adapter (%dms)\n",
jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
}
mutex_unlock(&priv->mutex);
}
-/**
- * iwl_supported_rate_to_ie - fill in the supported rate in IE field
- *
- * return : set the bit for each supported rate insert in ie
- */
-static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
- u16 basic_rate, int *left)
-{
- u16 ret_rates = 0, bit;
- int i;
- u8 *cnt = ie;
- u8 *rates = ie + 1;
-
- for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
- if (bit & supported_rate) {
- ret_rates |= bit;
- rates[*cnt] = iwl_rates[i].ieee |
- ((bit & basic_rate) ? 0x80 : 0x00);
- (*cnt)++;
- (*left)--;
- if ((*left <= 0) ||
- (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
- break;
- }
- }
-
- return ret_rates;
-}
-
-
-static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
- u8 *pos, int *left)
-{
- struct ieee80211_ht_cap *ht_cap;
-
- if (!sband || !sband->ht_info.ht_supported)
- return;
-
- if (*left < sizeof(struct ieee80211_ht_cap))
- return;
-
- *pos++ = sizeof(struct ieee80211_ht_cap);
- ht_cap = (struct ieee80211_ht_cap *) pos;
-
- ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
- memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
- ht_cap->ampdu_params_info =
- (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
- ((sband->ht_info.ampdu_density << 2) &
- IEEE80211_HT_CAP_AMPDU_DENSITY);
- *left -= sizeof(struct ieee80211_ht_cap);
-}
+EXPORT_SYMBOL(iwl_bg_scan_check);
/**
* iwl_fill_probe_req - fill in all required fields and IE for probe request
*/
-static u16 iwl_fill_probe_req(struct iwl_priv *priv,
- enum ieee80211_band band,
- struct ieee80211_mgmt *frame,
- int left)
+u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
+ const u8 *ies, int ie_len, int left)
{
int len = 0;
u8 *pos = NULL;
- u16 active_rates, ret_rates, cck_rates, active_rate_basic;
- const struct ieee80211_supported_band *sband =
- iwl_get_hw_mode(priv, band);
-
/* Make sure there is enough space for the probe request,
* two mandatory IEs and the data */
len += 2;
- /* fill in supported rate */
- left -= 2;
- if (left < 0)
- return 0;
-
- *pos++ = WLAN_EID_SUPP_RATES;
- *pos = 0;
-
- /* exclude 60M rate */
- active_rates = priv->rates_mask;
- active_rates &= ~IWL_RATE_60M_MASK;
-
- active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
-
- cck_rates = IWL_CCK_RATES_MASK & active_rates;
- ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
- active_rate_basic, &left);
- active_rates &= ~ret_rates;
-
- ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
- active_rate_basic, &left);
- active_rates &= ~ret_rates;
-
- len += 2 + *pos;
- pos += (*pos) + 1;
-
- if (active_rates == 0)
- goto fill_end;
-
- /* fill in supported extended rate */
- /* ...next IE... */
- left -= 2;
- if (left < 0)
- return 0;
- /* ... fill it in... */
- *pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos = 0;
- iwl_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left);
- if (*pos > 0) {
- len += 2 + *pos;
- pos += (*pos) + 1;
- } else {
- pos--;
- }
+ if (WARN_ON(left < ie_len))
+ return len;
- fill_end:
-
- left -= 2;
- if (left < 0)
- return 0;
-
- *pos++ = WLAN_EID_HT_CAPABILITY;
- *pos = 0;
- iwl_ht_cap_to_ie(sband, pos, &left);
- if (*pos > 0)
- len += 2 + *pos;
+ if (ies)
+ memcpy(pos, ies, ie_len);
+ len += ie_len;
+ left -= ie_len;
return (u16)len;
}
-
-static u32 iwl_scan_tx_ant(struct iwl_priv *priv, enum ieee80211_band band)
-{
- int i, ind;
-
- ind = priv->scan_tx_ant[band];
- for (i = 0; i < priv->hw_params.tx_chains_num; i++) {
- ind = (ind+1) >= priv->hw_params.tx_chains_num ? 0 : ind+1;
- if (priv->hw_params.valid_tx_ant & (1 << ind)) {
- priv->scan_tx_ant[band] = ind;
- break;
- }
- }
- IWL_DEBUG_SCAN("select TX ANT = %c\n", 'A' + ind);
- return scan_tx_ant[ind];
-}
-
+EXPORT_SYMBOL(iwl_fill_probe_req);
static void iwl_bg_request_scan(struct work_struct *data)
{
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_CMD,
.len = sizeof(struct iwl_scan_cmd),
- .meta.flags = CMD_SIZE_HUGE,
+ .flags = CMD_SIZE_HUGE,
};
struct iwl_scan_cmd *scan;
struct ieee80211_conf *conf = NULL;
- int ret = 0;
- u32 tx_ant;
+ u32 rate_flags = 0;
u16 cmd_len;
+ u16 rx_chain = 0;
enum ieee80211_band band;
- u8 n_probes = 2;
- u8 rx_chain = 0x7; /* bitmap: ABC chains */
+ u8 n_probes = 0;
+ u8 rx_ant = priv->hw_params.valid_rx_ant;
+ u8 rate;
+ bool is_active = false;
+ int chan_mod;
+ u8 active_chains;
conf = ieee80211_get_hw_conf(priv->hw);
mutex_lock(&priv->mutex);
+ cancel_delayed_work(&priv->scan_check);
+
if (!iwl_is_ready(priv)) {
- IWL_WARNING("request scan called when driver not ready.\n");
+ IWL_WARN(priv, "request scan called when driver not ready.\n");
goto done;
}
- /* Make sure the scan wasn't cancelled before this queued work
+ /* 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("Multiple concurrent scan requests in parallel. "
+ IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. "
"Ignoring second request.\n");
- ret = -EIO;
goto done;
}
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
- IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
+ IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
goto done;
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
- IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
+ IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n");
goto done;
}
if (iwl_is_rfkill(priv)) {
- IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
+ IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
goto done;
}
if (!test_bit(STATUS_READY, &priv->status)) {
- IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
+ IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n");
goto done;
}
if (!priv->scan_bands) {
- IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
+ IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
goto done;
}
priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan) {
- ret = -ENOMEM;
+ IWL_DEBUG_SCAN(priv,
+ "fail to allocate memory for scan\n");
goto done;
}
}
u32 scan_suspend_time = 100;
unsigned long flags;
- IWL_DEBUG_INFO("Scanning while associated...\n");
-
+ 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 = (extra |
((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
- IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
+ IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
}
- /* We should add the ability for user to lock to PASSIVE ONLY */
- if (priv->one_direct_scan) {
- IWL_DEBUG_SCAN("Start direct scan for '%s'\n",
- iwl_escape_essid(priv->direct_ssid,
- priv->direct_ssid_len));
- scan->direct_scan[0].id = WLAN_EID_SSID;
- scan->direct_scan[0].len = priv->direct_ssid_len;
- memcpy(scan->direct_scan[0].ssid,
- priv->direct_ssid, priv->direct_ssid_len);
- n_probes++;
- } else if (!iwl_is_associated(priv) && priv->essid_len) {
- IWL_DEBUG_SCAN("Start direct scan for '%s' (not associated)\n",
- iwl_escape_essid(priv->essid, priv->essid_len));
- scan->direct_scan[0].id = WLAN_EID_SSID;
- scan->direct_scan[0].len = priv->essid_len;
- memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
- n_probes++;
- } else {
- IWL_DEBUG_SCAN("Start indirect scan.\n");
- }
+ if (priv->is_internal_short_scan) {
+ IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
+ } else 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, "Start passive scan.\n");
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
band = IEEE80211_BAND_2GHZ;
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
- tx_ant = iwl_scan_tx_ant(priv, band);
- if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK)
- scan->tx_cmd.rate_n_flags =
- iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
- tx_ant);
- else
- scan->tx_cmd.rate_n_flags =
- iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
- tx_ant |
- RATE_MCS_CCK_MSK);
+ chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK)
+ >> RXON_FLG_CHANNEL_MODE_POS;
+ if (chan_mod == CHANNEL_MODE_PURE_40) {
+ rate = IWL_RATE_6M_PLCP;
+ } else {
+ rate = IWL_RATE_1M_PLCP;
+ rate_flags = RATE_MCS_CCK_MSK;
+ }
scan->good_CRC_th = 0;
} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
band = IEEE80211_BAND_5GHZ;
- tx_ant = iwl_scan_tx_ant(priv, band);
- scan->tx_cmd.rate_n_flags =
- iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
- tx_ant);
- scan->good_CRC_th = IWL_GOOD_CRC_TH;
-
- /* Force use of chains B and C (0x6) for scan Rx for 4965
- * Avoid A (0x1) because of its off-channel reception on A-band.
- * MIMO is not used here, but value is required */
- if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
- rx_chain = 0x6;
+ 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;
+
+ /* Force use of chains B and C (0x6) for scan Rx
+ * Avoid A (0x1) for the device has off-channel reception
+ * on A-band.
+ */
+ if (priv->cfg->off_channel_workaround)
+ rx_ant = ANT_BC;
} else {
- IWL_WARNING("Invalid scan band count\n");
+ IWL_WARN(priv, "Invalid scan band count\n");
goto done;
}
- scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
- cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
- (rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) |
- (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
+ priv->scan_tx_ant[band] =
+ iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]);
+ rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
+ scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
- cmd_len = iwl_fill_probe_req(priv, band,
- (struct ieee80211_mgmt *)scan->data,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ /* In power save mode use one chain, otherwise use all chains */
+ if (test_bit(STATUS_POWER_PMI, &priv->status)) {
+ /* rx_ant has been set to all valid chains previously */
+ active_chains = rx_ant &
+ ((u8)(priv->chain_noise_data.active_chains));
+ if (!active_chains)
+ active_chains = rx_ant;
- scan->tx_cmd.len = cpu_to_le16(cmd_len);
+ IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
+ priv->chain_noise_data.active_chains);
- if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
+ rx_ant = first_antenna(active_chains);
+ }
+ /* MIMO is not used here, but value is required */
+ rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
+ rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
+ rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
+ rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
+ scan->rx_chain = cpu_to_le16(rx_chain);
+ if (!priv->is_internal_short_scan) {
+ cmd_len = 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));
+ } else {
+ cmd_len = iwl_fill_probe_req(priv,
+ (struct ieee80211_mgmt *)scan->data,
+ NULL, 0,
+ IWL_MAX_SCAN_SIZE - sizeof(*scan));
+
+ }
+ scan->tx_cmd.len = cpu_to_le16(cmd_len);
+ if (iwl_is_monitor_mode(priv))
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
RXON_FILTER_BCON_AWARE_MSK);
- scan->channel_count =
- iwl_get_channels_for_scan(priv, band, 1, /* active */
- n_probes,
- (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
-
+ if (priv->is_internal_short_scan) {
+ scan->channel_count =
+ iwl_get_single_channel_for_scan(priv, band,
+ (void *)&scan->data[le16_to_cpu(
+ scan->tx_cmd.len)]);
+ } else {
+ scan->channel_count =
+ iwl_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("channel count %d\n", scan->channel_count);
+ IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
goto done;
}
scan->len = cpu_to_le16(cmd.len);
set_bit(STATUS_SCAN_HW, &priv->status);
- ret = iwl_send_cmd_sync(priv, &cmd);
- if (ret)
+ if (iwl_send_cmd_sync(priv, &cmd))
goto done;
queue_delayed_work(priv->workqueue, &priv->scan_check,
return;
done:
+ /* Cannot perform scan. Make sure we clear scanning
+ * bits from status so next scan request can be performed.
+ * If we don't 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 iwl_bg_abort_scan(struct work_struct *work)
+void iwl_bg_abort_scan(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
- if (!iwl_is_ready(priv))
+ if (!test_bit(STATUS_READY, &priv->status) ||
+ !test_bit(STATUS_GEO_CONFIGURED, &priv->status))
return;
mutex_lock(&priv->mutex);
mutex_unlock(&priv->mutex);
}
+EXPORT_SYMBOL(iwl_bg_abort_scan);
+
+void iwl_bg_scan_completed(struct work_struct *work)
+{
+ struct iwl_priv *priv =
+ container_of(work, struct iwl_priv, scan_completed);
+
+ IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");
+
+ cancel_delayed_work(&priv->scan_check);
+
+ if (!priv->is_internal_short_scan)
+ ieee80211_scan_completed(priv->hw, false);
+ else {
+ priv->is_internal_short_scan = false;
+ IWL_DEBUG_SCAN(priv, "internal short scan completed\n");
+ }
+
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+
+ /* Since setting the TXPOWER may have been deferred while
+ * performing the scan, fire one off */
+ mutex_lock(&priv->mutex);
+ iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
+ mutex_unlock(&priv->mutex);
+}
+EXPORT_SYMBOL(iwl_bg_scan_completed);
void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
{
- /* FIXME: move here when resolved PENDING
- * INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); */
+ INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
+ INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
}
EXPORT_SYMBOL(iwl_setup_scan_deferred_work);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff