diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/scan.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/scan.c | 79 |
1 files changed, 66 insertions, 13 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c index 09545f23b24f..cb85e63c20aa 100644 --- a/drivers/net/wireless/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/iwlwifi/mvm/scan.c @@ -339,6 +339,55 @@ not_bound: } } +static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) +{ + /* require rrm scan whenever the fw supports it */ + return mvm->fw->ucode_capa.capa[0] & + IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT; +} + +static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm, + bool is_sched_scan) +{ + int max_probe_len; + + if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) + max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; + else + max_probe_len = mvm->fw->ucode_capa.max_probe_length; + + /* we create the 802.11 header and SSID element */ + max_probe_len -= 24 + 2; + + /* basic ssid is added only for hw_scan with and old api */ + if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) && + !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) && + !is_sched_scan) + max_probe_len -= 32; + + return max_probe_len; +} + +int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan) +{ + int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan); + + if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) + return max_ie_len; + + /* TODO: [BUG] This function should return the maximum allowed size of + * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs + * in the same command. So the correct implementation of this function + * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan + * command has only 512 bytes and it would leave us with about 240 + * bytes for scan IEs, which is clearly not enough. So meanwhile + * we will report an incorrect value. This may result in a failure to + * issue a scan in unified_scan_lmac and unified_sched_scan_lmac + * functions with -ENOBUFS, if a large enough probe will be provided. + */ + return max_ie_len; +} + int iwl_mvm_scan_request(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_scan_request *req) @@ -1153,6 +1202,10 @@ iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm, IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); } + + if (iwl_mvm_rrm_scan_needed(mvm)) + cmd->scan_flags |= + cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); } int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, @@ -1180,13 +1233,12 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (WARN_ON_ONCE(req->req.n_ssids > PROBE_OPTION_MAX || - req->ies.common_ie_len + req->ies.len[0] + - req->ies.len[1] + 24 + 2 > - SCAN_OFFLOAD_PROBE_REQ_SIZE || - req->req.n_channels > - mvm->fw->ucode_capa.n_scan_channels)) - return -1; + if (req->req.n_ssids > PROBE_OPTION_MAX || + req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] + + req->ies.len[NL80211_BAND_5GHZ] > + iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) || + req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels) + return -ENOBUFS; mvm->scan_status = IWL_MVM_SCAN_OS; @@ -1208,7 +1260,7 @@ int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, if (req->req.n_ssids == 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; - cmd->scan_flags = cpu_to_le32(flags); + cmd->scan_flags |= cpu_to_le32(flags); cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | @@ -1274,10 +1326,11 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (WARN_ON_ONCE(req->n_ssids > PROBE_OPTION_MAX || - ies->common_ie_len + ies->len[0] + ies->len[1] + 24 + 2 - > SCAN_OFFLOAD_PROBE_REQ_SIZE || - req->n_channels > mvm->fw->ucode_capa.n_scan_channels)) + if (req->n_ssids > PROBE_OPTION_MAX || + ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + + ies->len[NL80211_BAND_5GHZ] > + iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) || + req->n_channels > mvm->fw->ucode_capa.n_scan_channels) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms); @@ -1305,7 +1358,7 @@ int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, if (req->n_ssids == 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; - cmd->scan_flags = cpu_to_le32(flags); + cmd->scan_flags |= cpu_to_le32(flags); cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | |