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iwlwifi: mvm: enable passive fragmented scan changes

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Enable fragmented scan that was diabled due to a FW bug.
New fixed FWs use a TLV bit to advertise fragmented scan support.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
David Spinadel 2014-07-22 13:11:18 +03:00 committed by Emmanuel Grumbach
parent fea7795f1c
commit 2ce89cd6df
2 changed files with 42 additions and 9 deletions
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3
drivers/net/wireless/iwlwifi/iwl-fw.h
View File

@ -125,6 +125,8 @@ enum iwl_ucode_tlv_flag {
* @IWL_UCODE_TLV_API_CSA_FLOW: ucode can do unbind-bind flow for CSA.
* @IWL_UCODE_TLV_API_DISABLE_STA_TX: ucode supports tx_disable bit.
* @IWL_UCODE_TLV_API_LMAC_SCAN: This ucode uses LMAC unified scan API.
* @IWL_UCODE_TLV_API_FRAGMENTED_SCAN: This ucode supports active dwell time
* longer than the passive one, which is essential for fragmented scan.
*/
enum iwl_ucode_tlv_api {
IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID = BIT(0),
@ -133,6 +135,7 @@ enum iwl_ucode_tlv_api {
IWL_UCODE_TLV_API_CSA_FLOW = BIT(4),
IWL_UCODE_TLV_API_DISABLE_STA_TX = BIT(5),
IWL_UCODE_TLV_API_LMAC_SCAN = BIT(6),
IWL_UCODE_TLV_API_FRAGMENTED_SCAN = BIT(8),
};
/**

48
drivers/net/wireless/iwlwifi/mvm/scan.c
View File

@ -279,6 +279,7 @@ static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
{
bool global_bound = false;
enum ieee80211_band band;
u8 frag_passive_dwell = 0;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
@ -288,12 +289,36 @@ static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
if (!global_bound)
goto not_bound;
params->suspend_time = 100;
params->max_out_time = 600;
params->suspend_time = 30;
params->max_out_time = 170;
if (iwl_mvm_low_latency(mvm)) {
params->suspend_time = 250;
params->max_out_time = 250;
if (mvm->fw->ucode_capa.api[0] &
IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
params->suspend_time = 105;
params->max_out_time = 70;
frag_passive_dwell = 20;
} else {
params->suspend_time = 120;
params->max_out_time = 120;
}
}
if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
/*
* P2P device scan should not be fragmented to avoid negative
* impact on P2P device discovery. Configure max_out_time to be
* equal to dwell time on passive channel. Take a longest
* possible value, one that corresponds to 2GHz band
*/
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
u32 passive_dwell =
iwl_mvm_get_passive_dwell(IEEE80211_BAND_2GHZ);
params->max_out_time = passive_dwell;
} else {
params->passive_fragmented = true;
}
}
if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
@ -302,7 +327,11 @@ static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
not_bound:
for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
params->dwell[band].passive = iwl_mvm_get_passive_dwell(band);
if (params->passive_fragmented)
params->dwell[band].passive = frag_passive_dwell;
else
params->dwell[band].passive =
iwl_mvm_get_passive_dwell(band);
params->dwell[band].active = iwl_mvm_get_active_dwell(band,
n_ssids);
}
@ -1100,10 +1129,11 @@ iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params)
{
memset(cmd, 0, ksize(cmd));
cmd->active_dwell = (u8)params->dwell[IEEE80211_BAND_2GHZ].active;
cmd->passive_dwell = (u8)params->dwell[IEEE80211_BAND_2GHZ].passive;
/* TODO: Use params; now fragmented isn't used. */
cmd->fragmented_dwell = 0;
cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
if (params->passive_fragmented)
cmd->fragmented_dwell =
params->dwell[IEEE80211_BAND_2GHZ].passive;
cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
cmd->max_out_time = cpu_to_le32(params->max_out_time);
cmd->suspend_time = cpu_to_le32(params->suspend_time);