diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mld/scan.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mld/scan.c | 156 |
1 files changed, 155 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/scan.c b/drivers/net/wireless/intel/iwlwifi/mld/scan.c index 479a76a94aa8..62f97a18a16c 100644 --- a/drivers/net/wireless/intel/iwlwifi/mld/scan.c +++ b/drivers/net/wireless/intel/iwlwifi/mld/scan.c @@ -4,6 +4,8 @@ */ #include <linux/crc32.h> +#include "iwl-utils.h" + #include "mld.h" #include "scan.h" #include "hcmd.h" @@ -482,7 +484,9 @@ iwl_mld_scan_get_cmd_gen_flags(struct iwl_mld *mld, static u8 iwl_mld_scan_get_cmd_gen_flags2(struct iwl_mld *mld, struct iwl_mld_scan_params *params, - struct ieee80211_vif *vif, u16 gen_flags) + struct ieee80211_vif *vif, + enum iwl_mld_scan_status scan_status, + u16 gen_flags) { u8 flags = 0; @@ -494,6 +498,17 @@ iwl_mld_scan_get_cmd_gen_flags2(struct iwl_mld *mld, if (params->scan_6ghz) flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT; + /* For AP interfaces, request survey data for regular scans and if + * it is supported. For non-AP interfaces, EBS will be enabled and + * the results may be missing information for some channels. + */ + if (scan_status == IWL_MLD_SCAN_REGULAR && + ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP && + gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE && + iwl_fw_lookup_notif_ver(mld->fw, SCAN_GROUP, + CHANNEL_SURVEY_NOTIF, 0) >= 1) + flags |= IWL_UMAC_SCAN_GEN_FLAGS2_COLLECT_CHANNEL_STATS; + return flags; } @@ -544,6 +559,7 @@ iwl_mld_scan_cmd_set_gen_params(struct iwl_mld *mld, u16 gen_flags = iwl_mld_scan_get_cmd_gen_flags(mld, params, vif, scan_status); u8 gen_flags2 = iwl_mld_scan_get_cmd_gen_flags2(mld, params, vif, + scan_status, gen_flags); IWL_DEBUG_SCAN(mld, "General: flags=0x%x, flags2=0x%x\n", @@ -1752,6 +1768,11 @@ int iwl_mld_regular_scan_start(struct iwl_mld *mld, struct ieee80211_vif *vif, struct cfg80211_scan_request *req, struct ieee80211_scan_ies *ies) { + /* Clear survey data when starting the first part of a regular scan */ + if (req->first_part && mld->channel_survey) + memset(mld->channel_survey->channels, 0, + sizeof(mld->channel_survey->channels[0]) * + mld->channel_survey->n_channels); if (vif->type == NL80211_IFTYPE_P2P_DEVICE) iwl_mld_emlsr_block_tmp_non_bss(mld); @@ -2025,3 +2046,136 @@ int iwl_mld_alloc_scan_cmd(struct iwl_mld *mld) return 0; } + +static int iwl_mld_chanidx_from_phy(struct iwl_mld *mld, + enum nl80211_band band, + u16 phy_chan_num) +{ + struct ieee80211_supported_band *sband = mld->wiphy->bands[band]; + + if (WARN_ON_ONCE(!sband)) + return -EINVAL; + + for (int chan_idx = 0; chan_idx < sband->n_channels; chan_idx++) { + struct ieee80211_channel *channel = &sband->channels[chan_idx]; + + if (channel->hw_value == phy_chan_num) + return chan_idx; + } + + return -EINVAL; +} + +void iwl_mld_handle_channel_survey_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt) +{ + const struct iwl_umac_scan_channel_survey_notif *notif = + (void *)pkt->data; + struct iwl_mld_survey_channel *info; + enum nl80211_band band; + int chan_idx; + + if (!mld->channel_survey) { + size_t n_channels = 0; + + for (band = 0; band < NUM_NL80211_BANDS; band++) { + if (!mld->wiphy->bands[band]) + continue; + + n_channels += mld->wiphy->bands[band]->n_channels; + } + + mld->channel_survey = kzalloc(struct_size(mld->channel_survey, + channels, n_channels), + GFP_KERNEL); + + if (!mld->channel_survey) + return; + + mld->channel_survey->n_channels = n_channels; + n_channels = 0; + for (band = 0; band < NUM_NL80211_BANDS; band++) { + if (!mld->wiphy->bands[band]) + continue; + + mld->channel_survey->bands[band] = + &mld->channel_survey->channels[n_channels]; + n_channels += mld->wiphy->bands[band]->n_channels; + } + } + + band = iwl_mld_phy_band_to_nl80211(le32_to_cpu(notif->band)); + chan_idx = iwl_mld_chanidx_from_phy(mld, band, + le32_to_cpu(notif->channel)); + if (WARN_ON_ONCE(chan_idx < 0)) + return; + + IWL_DEBUG_SCAN(mld, "channel survey received for freq %d\n", + mld->wiphy->bands[band]->channels[chan_idx].center_freq); + + info = &mld->channel_survey->bands[band][chan_idx]; + + /* Times are all in ms */ + info->time = le32_to_cpu(notif->active_time); + info->time_busy = le32_to_cpu(notif->busy_time); + info->noise = + iwl_average_neg_dbm(notif->noise, ARRAY_SIZE(notif->noise)); +} + +int iwl_mld_mac80211_get_survey(struct ieee80211_hw *hw, int idx, + struct survey_info *survey) +{ + struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw); + int curr_idx = 0; + + if (!mld->channel_survey) + return -ENOENT; + + /* Iterate bands/channels to find the requested index. + * Logically this returns the entry with index "idx" from a flattened + * survey result array that only contains channels with information. + * The current index into this flattened array is tracked in curr_idx. + */ + for (enum nl80211_band band = 0; band < NUM_NL80211_BANDS; band++) { + struct ieee80211_supported_band *sband = + mld->wiphy->bands[band]; + + if (!sband) + continue; + + for (int per_band_idx = 0; + per_band_idx < sband->n_channels; + per_band_idx++) { + struct iwl_mld_survey_channel *info = + &mld->channel_survey->bands[band][per_band_idx]; + + /* Skip entry entirely, it was not reported/scanned, + * do not increase curr_idx for this entry. + */ + if (!info->time) + continue; + + /* Search did not reach the requested entry yet, + * increment curr_idx and continue. + */ + if (idx != curr_idx) { + curr_idx++; + continue; + } + + /* Found (the next) channel to report */ + survey->channel = &sband->channels[per_band_idx]; + survey->filled = SURVEY_INFO_TIME | + SURVEY_INFO_TIME_BUSY; + survey->time = info->time; + survey->time_busy = info->time_busy; + survey->noise = info->noise; + if (survey->noise < 0) + survey->filled |= SURVEY_INFO_NOISE_DBM; + + return 0; + } + } + + return -ENOENT; +} |