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iwlwifi: mvm: configure scheduled scan according to traffic conditions

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Change scan configuration (dwell time, suspend time etc.) according
to traffic conditions. This is useful for scans that are managed by
the FW (e.g. scheduled scan).

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Avraham Stern 2015-11-26 11:22:33 +02:00 committed by Emmanuel Grumbach
parent cf0cda1910
commit 355346ba30
3 changed files with 34 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
View File

@ -993,6 +993,7 @@ static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
mvm->vif_count = 0;
mvm->rx_ba_sessions = 0;
mvm->fw_dbg_conf = FW_DBG_INVALID;
mvm->scan_type = IWL_SCAN_TYPE_NOT_SET;
/* keep statistics ticking */
iwl_mvm_accu_radio_stats(mvm);
@ -1868,6 +1869,9 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
iwl_mvm_bt_coex_vif_change(mvm);
iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
IEEE80211_SMPS_AUTOMATIC);
if (fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_UMAC_SCAN))
iwl_mvm_config_scan(mvm);
} else if (changes & BSS_CHANGED_BEACON_INFO) {
/*
* We received a beacon _after_ association so

10
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View File

@ -475,6 +475,14 @@ enum iwl_scan_status {
IWL_MVM_SCAN_MASK = 0xff,
};
enum iwl_mvm_scan_type {
IWL_SCAN_TYPE_NOT_SET,
IWL_SCAN_TYPE_UNASSOC,
IWL_SCAN_TYPE_WILD,
IWL_SCAN_TYPE_MILD,
IWL_SCAN_TYPE_FRAGMENTED,
};
/**
* struct iwl_nvm_section - describes an NVM section in memory.
*
@ -643,7 +651,7 @@ struct iwl_mvm {
unsigned int scan_status;
void *scan_cmd;
struct iwl_mcast_filter_cmd *mcast_filter_cmd;
bool scan_fragmented;
enum iwl_mvm_scan_type scan_type;
/* max number of simultaneous scans the FW supports */
unsigned int max_scans;

43
drivers/net/wireless/intel/iwlwifi/mvm/scan.c
View File

@ -72,13 +72,6 @@
#define IWL_DENSE_EBS_SCAN_RATIO 5
#define IWL_SPARSE_EBS_SCAN_RATIO 1
enum iwl_mvm_scan_type {
IWL_SCAN_TYPE_UNASSOC,
IWL_SCAN_TYPE_WILD,
IWL_SCAN_TYPE_MILD,
IWL_SCAN_TYPE_FRAGMENTED,
};
enum iwl_mvm_traffic_load {
IWL_MVM_TRAFFIC_LOW,
IWL_MVM_TRAFFIC_MEDIUM,
@ -206,9 +199,7 @@ static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
}
static enum
iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params)
iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
{
int global_cnt = 0;
enum iwl_mvm_traffic_load load;
@ -224,8 +215,7 @@ iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
load = iwl_mvm_get_traffic_load(mvm);
low_latency = iwl_mvm_low_latency(mvm);
if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
return IWL_SCAN_TYPE_FRAGMENTED;
@ -917,18 +907,20 @@ int iwl_mvm_config_scan(struct iwl_mvm *mvm)
struct iwl_host_cmd cmd = {
.id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
};
enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
return -ENOBUFS;
if (type == mvm->scan_type)
return 0;
cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
scan_config = kzalloc(cmd_size, GFP_KERNEL);
if (!scan_config)
return -ENOMEM;
mvm->scan_fragmented = iwl_mvm_low_latency(mvm);
scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
SCAN_CONFIG_FLAG_SET_TX_CHAINS |
@ -938,17 +930,18 @@ int iwl_mvm_config_scan(struct iwl_mvm *mvm)
SCAN_CONFIG_FLAG_SET_MAC_ADDR |
SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
SCAN_CONFIG_N_CHANNELS(num_channels) |
(mvm->scan_fragmented ?
(type == IWL_SCAN_TYPE_FRAGMENTED ?
SCAN_CONFIG_FLAG_SET_FRAGMENTED :
SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
scan_config->out_of_channel_time = cpu_to_le32(170);
scan_config->suspend_time = cpu_to_le32(30);
scan_config->dwell_active = 20;
scan_config->dwell_passive = 110;
scan_config->dwell_fragmented = 20;
scan_config->out_of_channel_time =
cpu_to_le32(scan_timing[type].max_out_time);
scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
scan_config->dwell_active = scan_timing[type].dwell_active;
scan_config->dwell_passive = scan_timing[type].dwell_passive;
scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
@ -972,6 +965,8 @@ int iwl_mvm_config_scan(struct iwl_mvm *mvm)
IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
ret = iwl_mvm_send_cmd(mvm, &cmd);
if (!ret)
mvm->scan_type = type;
kfree(scan_config);
return ret;
@ -1225,7 +1220,9 @@ int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
params.scan_plans = &scan_plan;
params.n_scan_plans = 1;
params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
params.type =
iwl_mvm_get_scan_type(mvm,
vif->type == NL80211_IFTYPE_P2P_DEVICE);
iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
@ -1307,7 +1304,9 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
params.n_scan_plans = req->n_scan_plans;
params.scan_plans = req->scan_plans;
params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
params.type =
iwl_mvm_get_scan_type(mvm,
vif->type == NL80211_IFTYPE_P2P_DEVICE);
/* In theory, LMAC scans can handle a 32-bit delay, but since
* waiting for over 18 hours to start the scan is a bit silly