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iwlwifi: HT IE in probe request clean up
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This patch cleans up the scan flow. This patch cleans up the insertion of
the HT IE in the probe request.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Emmanuel Grumbach authored and John W. Linville committed May 7, 2008
1 parent cc2a8ea commit d1141df
Showing 1 changed file with 101 additions and 81 deletions.
182 changes: 101 additions & 81 deletions drivers/net/wireless/iwlwifi/iwl4965-base.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
return NULL;
}

static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
static const struct ieee80211_supported_band *iwl_get_hw_mode(
struct iwl_priv *priv, enum ieee80211_band band)
{
return priv->hw->wiphy->bands[band];
Expand Down Expand Up @@ -1166,6 +1166,91 @@ static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
return ret_rates;
}

#ifdef CONFIG_IWL4965_HT
static void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
struct iwl_ht_info *iwl_conf = &priv->current_ht_config;

IWL_DEBUG_MAC80211("enter: \n");

iwl_conf->is_ht = bss_conf->assoc_ht;

if (!iwl_conf->is_ht)
return;

priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);

if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
iwl_conf->sgf |= 0x1;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
iwl_conf->sgf |= 0x2;

iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
iwl_conf->max_amsdu_size =
!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);

iwl_conf->supported_chan_width =
!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
iwl_conf->extension_chan_offset =
ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
/* If no above or below channel supplied disable FAT channel */
if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
iwl_conf->supported_chan_width = 0;

iwl_conf->tx_mimo_ps_mode =
(u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);

iwl_conf->control_channel = ht_bss_conf->primary_channel;
iwl_conf->tx_chan_width =
!!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
iwl_conf->ht_protection =
ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
iwl_conf->non_GF_STA_present =
!!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);

IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
IWL_DEBUG_MAC80211("leave\n");
}

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);
}
#else
static inline void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
}
static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
u8 *pos, int *left)
{
}
#endif


/**
* iwl4965_fill_probe_req - fill in all required fields and IE for probe request
*/
Expand All @@ -1177,10 +1262,8 @@ static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
int len = 0;
u8 *pos = NULL;
u16 active_rates, ret_rates, cck_rates, active_rate_basic;
#ifdef CONFIG_IWL4965_HT
const struct ieee80211_supported_band *sband =
iwl4965_get_hw_mode(priv, band);
#endif /* CONFIG_IWL4965_HT */
iwl_get_hw_mode(priv, band);

/* Make sure there is enough space for the probe request,
* two mandatory IEs and the data */
Expand Down Expand Up @@ -1263,24 +1346,19 @@ static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
if (*pos > 0)
len += 2 + *pos;

#ifdef CONFIG_IWL4965_HT
if (sband && sband->ht_info.ht_supported) {
struct ieee80211_ht_cap *ht_cap;
pos += (*pos) + 1;
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
ht_cap = (struct ieee80211_ht_cap *)pos;
ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
IEEE80211_HT_CAP_AMPDU_FACTOR) |
((sband->ht_info.ampdu_density << 2) &
IEEE80211_HT_CAP_AMPDU_DENSITY);
len += 2 + sizeof(struct ieee80211_ht_cap);
}
#endif /*CONFIG_IWL4965_HT */

fill_end:
/* fill in HT IE */
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;
return (u16)len;
}

Expand Down Expand Up @@ -2146,7 +2224,7 @@ static void iwl4965_set_rate(struct iwl_priv *priv)
struct ieee80211_rate *rate;
int i;

hw = iwl4965_get_hw_mode(priv, priv->band);
hw = iwl_get_hw_mode(priv, priv->band);
if (!hw) {
IWL_ERROR("Failed to set rate: unable to get hw mode\n");
return;
Expand Down Expand Up @@ -4360,7 +4438,7 @@ static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
u16 active_dwell = 0;
int added, i;

sband = iwl4965_get_hw_mode(priv, band);
sband = iwl_get_hw_mode(priv, band);
if (!sband)
return 0;

Expand Down Expand Up @@ -6328,64 +6406,6 @@ static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,

}


#ifdef CONFIG_IWL4965_HT
static void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
struct iwl_ht_info *iwl_conf = &priv->current_ht_config;

IWL_DEBUG_MAC80211("enter: \n");

iwl_conf->is_ht = bss_conf->assoc_ht;

if (!iwl_conf->is_ht)
return;

priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);

if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
iwl_conf->sgf |= 0x1;
if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
iwl_conf->sgf |= 0x2;

iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
iwl_conf->max_amsdu_size =
!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);

iwl_conf->supported_chan_width =
!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
iwl_conf->extension_chan_offset =
ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
/* If no above or below channel supplied disable FAT channel */
if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
iwl_conf->supported_chan_width = 0;

iwl_conf->tx_mimo_ps_mode =
(u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);

iwl_conf->control_channel = ht_bss_conf->primary_channel;
iwl_conf->tx_chan_width =
!!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
iwl_conf->ht_protection =
ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
iwl_conf->non_GF_STA_present =
!!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);

IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
IWL_DEBUG_MAC80211("leave\n");
}
#else
static inline void iwl4965_ht_conf(struct iwl_priv *priv,
struct ieee80211_bss_conf *bss_conf)
{
}
#endif

#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
Expand Down

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