diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/scan.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 3255 |
1 files changed, 3255 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c new file mode 100644 index 000000000..acd8803db --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c @@ -0,0 +1,3255 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (C) 2012-2014, 2018-2021 Intel Corporation + * Copyright (C) 2013-2015 Intel Mobile Communications GmbH + * Copyright (C) 2016-2017 Intel Deutschland GmbH + */ +#include <linux/etherdevice.h> +#include <net/mac80211.h> +#include <linux/crc32.h> + +#include "mvm.h" +#include "fw/api/scan.h" +#include "iwl-io.h" + +#define IWL_DENSE_EBS_SCAN_RATIO 5 +#define IWL_SPARSE_EBS_SCAN_RATIO 1 + +#define IWL_SCAN_DWELL_ACTIVE 10 +#define IWL_SCAN_DWELL_PASSIVE 110 +#define IWL_SCAN_DWELL_FRAGMENTED 44 +#define IWL_SCAN_DWELL_EXTENDED 90 +#define IWL_SCAN_NUM_OF_FRAGS 3 + +/* adaptive dwell max budget time [TU] for full scan */ +#define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300 +/* adaptive dwell max budget time [TU] for directed scan */ +#define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100 +/* adaptive dwell default high band APs number */ +#define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8 +/* adaptive dwell default low band APs number */ +#define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2 +/* adaptive dwell default APs number in social channels (1, 6, 11) */ +#define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10 +/* number of scan channels */ +#define IWL_SCAN_NUM_CHANNELS 112 +/* adaptive dwell number of APs override mask for p2p friendly GO */ +#define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20) +/* adaptive dwell number of APs override mask for social channels */ +#define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21) +/* adaptive dwell number of APs override for p2p friendly GO channels */ +#define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10 +/* adaptive dwell number of APs override for social channels */ +#define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2 + +/* minimal number of 2GHz and 5GHz channels in the regular scan request */ +#define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4 + +struct iwl_mvm_scan_timing_params { + u32 suspend_time; + u32 max_out_time; +}; + +static struct iwl_mvm_scan_timing_params scan_timing[] = { + [IWL_SCAN_TYPE_UNASSOC] = { + .suspend_time = 0, + .max_out_time = 0, + }, + [IWL_SCAN_TYPE_WILD] = { + .suspend_time = 30, + .max_out_time = 120, + }, + [IWL_SCAN_TYPE_MILD] = { + .suspend_time = 120, + .max_out_time = 120, + }, + [IWL_SCAN_TYPE_FRAGMENTED] = { + .suspend_time = 95, + .max_out_time = 44, + }, + [IWL_SCAN_TYPE_FAST_BALANCE] = { + .suspend_time = 30, + .max_out_time = 37, + }, +}; + +struct iwl_mvm_scan_params { + /* For CDB this is low band scan type, for non-CDB - type. */ + enum iwl_mvm_scan_type type; + enum iwl_mvm_scan_type hb_type; + u32 n_channels; + u16 delay; + int n_ssids; + struct cfg80211_ssid *ssids; + struct ieee80211_channel **channels; + u32 flags; + u8 *mac_addr; + u8 *mac_addr_mask; + bool no_cck; + bool pass_all; + int n_match_sets; + struct iwl_scan_probe_req preq; + struct cfg80211_match_set *match_sets; + int n_scan_plans; + struct cfg80211_sched_scan_plan *scan_plans; + bool iter_notif; + struct cfg80211_scan_6ghz_params *scan_6ghz_params; + u32 n_6ghz_params; + bool scan_6ghz; + bool enable_6ghz_passive; + bool respect_p2p_go, respect_p2p_go_hb; +}; + +static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) +{ + struct iwl_scan_req_umac *cmd = mvm->scan_cmd; + + if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) + return (void *)&cmd->v8.data; + + if (iwl_mvm_is_adaptive_dwell_supported(mvm)) + return (void *)&cmd->v7.data; + + if (iwl_mvm_cdb_scan_api(mvm)) + return (void *)&cmd->v6.data; + + return (void *)&cmd->v1.data; +} + +static inline struct iwl_scan_umac_chan_param * +iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm) +{ + struct iwl_scan_req_umac *cmd = mvm->scan_cmd; + + if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) + return &cmd->v8.channel; + + if (iwl_mvm_is_adaptive_dwell_supported(mvm)) + return &cmd->v7.channel; + + if (iwl_mvm_cdb_scan_api(mvm)) + return &cmd->v6.channel; + + return &cmd->v1.channel; +} + +static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) +{ + if (mvm->scan_rx_ant != ANT_NONE) + return mvm->scan_rx_ant; + return iwl_mvm_get_valid_rx_ant(mvm); +} + +static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) +{ + u16 rx_chain; + u8 rx_ant; + + rx_ant = iwl_mvm_scan_rx_ant(mvm); + rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; + rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; + rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; + rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; + return cpu_to_le16(rx_chain); +} + +static inline __le32 +iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, + bool no_cck) +{ + u32 tx_ant; + + iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx); + tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; + + if (band == NL80211_BAND_2GHZ && !no_cck) + return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK_V1 | + tx_ant); + else + return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); +} + +static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) +{ + return mvm->tcm.result.global_load; +} + +static enum iwl_mvm_traffic_load +iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band) +{ + return mvm->tcm.result.band_load[band]; +} + +struct iwl_mvm_scan_iter_data { + u32 global_cnt; + struct ieee80211_vif *current_vif; + bool is_dcm_with_p2p_go; +}; + +static void iwl_mvm_scan_iterator(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_scan_iter_data *data = _data; + struct iwl_mvm_vif *curr_mvmvif; + + if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && + mvmvif->phy_ctxt->id < NUM_PHY_CTX) + data->global_cnt += 1; + + if (!data->current_vif || vif == data->current_vif) + return; + + curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif); + + if (vif->type == NL80211_IFTYPE_AP && vif->p2p && + mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt && + mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id) + data->is_dcm_with_p2p_go = true; +} + +static enum +iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + enum iwl_mvm_traffic_load load, + bool low_latency) +{ + struct iwl_mvm_scan_iter_data data = { + .current_vif = vif, + .is_dcm_with_p2p_go = false, + .global_cnt = 0, + }; + + ieee80211_iterate_active_interfaces_atomic(mvm->hw, + IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_scan_iterator, + &data); + + if (!data.global_cnt) + return IWL_SCAN_TYPE_UNASSOC; + + if (fw_has_api(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) { + if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && + (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE)) + return IWL_SCAN_TYPE_FRAGMENTED; + + /* + * in case of DCM with GO where BSS DTIM interval < 220msec + * set all scan requests as fast-balance scan + */ + if (vif && vif->type == NL80211_IFTYPE_STATION && + vif->bss_conf.dtim_period < 220 && + data.is_dcm_with_p2p_go) + return IWL_SCAN_TYPE_FAST_BALANCE; + } + + if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) + return IWL_SCAN_TYPE_MILD; + + return IWL_SCAN_TYPE_WILD; +} + +static enum +iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + enum iwl_mvm_traffic_load load; + bool low_latency; + + load = iwl_mvm_get_traffic_load(mvm); + low_latency = iwl_mvm_low_latency(mvm); + + return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency); +} + +static enum +iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + enum nl80211_band band) +{ + enum iwl_mvm_traffic_load load; + bool low_latency; + + load = iwl_mvm_get_traffic_load_band(mvm, band); + low_latency = iwl_mvm_low_latency_band(mvm, band); + + return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency); +} + +static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) +{ + /* require rrm scan whenever the fw supports it */ + return fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); +} + +static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) +{ + int max_probe_len; + + max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; + + /* we create the 802.11 header and SSID element */ + max_probe_len -= 24 + 2; + + /* DS parameter set element is added on 2.4GHZ band if required */ + if (iwl_mvm_rrm_scan_needed(mvm)) + max_probe_len -= 3; + + return max_probe_len; +} + +int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) +{ + int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); + + /* 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; +} + +void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; + + IWL_DEBUG_SCAN(mvm, + "Scan offload iteration complete: status=0x%x scanned channels=%d\n", + notif->status, notif->scanned_channels); + + if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { + IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); + ieee80211_sched_scan_results(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; + } +} + +void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); + ieee80211_sched_scan_results(mvm->hw); +} + +static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) +{ + switch (status) { + case IWL_SCAN_EBS_SUCCESS: + return "successful"; + case IWL_SCAN_EBS_INACTIVE: + return "inactive"; + case IWL_SCAN_EBS_FAILED: + case IWL_SCAN_EBS_CHAN_NOT_FOUND: + default: + return "failed"; + } +} + +void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; + bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); + + /* If this happens, the firmware has mistakenly sent an LMAC + * notification during UMAC scans -- warn and ignore it. + */ + if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_UMAC_SCAN))) + return; + + /* scan status must be locked for proper checking */ + lockdep_assert_held(&mvm->mutex); + + /* We first check if we were stopping a scan, in which case we + * just clear the stopping flag. Then we check if it was a + * firmware initiated stop, in which case we need to inform + * mac80211. + * Note that we can have a stopping and a running scan + * simultaneously, but we can't have two different types of + * scans stopping or running at the same time (since LMAC + * doesn't support it). + */ + + if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { + WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); + + IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", + aborted ? "aborted" : "completed", + iwl_mvm_ebs_status_str(scan_notif->ebs_status)); + IWL_DEBUG_SCAN(mvm, + "Last line %d, Last iteration %d, Time after last iteration %d\n", + scan_notif->last_schedule_line, + scan_notif->last_schedule_iteration, + __le32_to_cpu(scan_notif->time_after_last_iter)); + + mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; + } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { + IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", + aborted ? "aborted" : "completed", + iwl_mvm_ebs_status_str(scan_notif->ebs_status)); + + mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; + } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { + WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); + + IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", + aborted ? "aborted" : "completed", + iwl_mvm_ebs_status_str(scan_notif->ebs_status)); + IWL_DEBUG_SCAN(mvm, + "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", + scan_notif->last_schedule_line, + scan_notif->last_schedule_iteration, + __le32_to_cpu(scan_notif->time_after_last_iter)); + + mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; + ieee80211_sched_scan_stopped(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { + struct cfg80211_scan_info info = { + .aborted = aborted, + }; + + IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", + aborted ? "aborted" : "completed", + iwl_mvm_ebs_status_str(scan_notif->ebs_status)); + + mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; + ieee80211_scan_completed(mvm->hw, &info); + cancel_delayed_work(&mvm->scan_timeout_dwork); + iwl_mvm_resume_tcm(mvm); + } else { + IWL_ERR(mvm, + "got scan complete notification but no scan is running\n"); + } + + mvm->last_ebs_successful = + scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || + scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; +} + +static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) +{ + int i; + + for (i = 0; i < PROBE_OPTION_MAX; i++) { + if (!ssid_list[i].len) + break; + if (ssid_list[i].len == ssid_len && + !memcmp(ssid_list->ssid, ssid, ssid_len)) + return i; + } + return -1; +} + +/* We insert the SSIDs in an inverted order, because the FW will + * invert it back. + */ +static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, + struct iwl_ssid_ie *ssids, + u32 *ssid_bitmap) +{ + int i, j; + int index; + u32 tmp_bitmap = 0; + + /* + * copy SSIDs from match list. + * iwl_config_sched_scan_profiles() uses the order of these ssids to + * config match list. + */ + for (i = 0, j = params->n_match_sets - 1; + j >= 0 && i < PROBE_OPTION_MAX; + i++, j--) { + /* skip empty SSID matchsets */ + if (!params->match_sets[j].ssid.ssid_len) + continue; + ssids[i].id = WLAN_EID_SSID; + ssids[i].len = params->match_sets[j].ssid.ssid_len; + memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, + ssids[i].len); + } + + /* add SSIDs from scan SSID list */ + for (j = params->n_ssids - 1; + j >= 0 && i < PROBE_OPTION_MAX; + i++, j--) { + index = iwl_ssid_exist(params->ssids[j].ssid, + params->ssids[j].ssid_len, + ssids); + if (index < 0) { + ssids[i].id = WLAN_EID_SSID; + ssids[i].len = params->ssids[j].ssid_len; + memcpy(ssids[i].ssid, params->ssids[j].ssid, + ssids[i].len); + tmp_bitmap |= BIT(i); + } else { + tmp_bitmap |= BIT(index); + } + } + if (ssid_bitmap) + *ssid_bitmap = tmp_bitmap; +} + +static int +iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req) +{ + struct iwl_scan_offload_profile *profile; + struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1; + struct iwl_scan_offload_blocklist *blocklist; + struct iwl_scan_offload_profile_cfg_data *data; + int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw); + int profile_cfg_size = sizeof(*data) + + sizeof(*profile) * max_profiles; + struct iwl_host_cmd cmd = { + .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, + .len[1] = profile_cfg_size, + .dataflags[0] = IWL_HCMD_DFL_NOCOPY, + .dataflags[1] = IWL_HCMD_DFL_NOCOPY, + }; + int blocklist_len; + int i; + int ret; + + if (WARN_ON(req->n_match_sets > max_profiles)) + return -EIO; + + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) + blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; + else + blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; + + blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL); + if (!blocklist) + return -ENOMEM; + + profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL); + if (!profile_cfg_v1) { + ret = -ENOMEM; + goto free_blocklist; + } + + cmd.data[0] = blocklist; + cmd.len[0] = sizeof(*blocklist) * blocklist_len; + cmd.data[1] = profile_cfg_v1; + + /* if max_profile is MAX_PROFILES_V2, we have the new API */ + if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) { + struct iwl_scan_offload_profile_cfg *profile_cfg = + (struct iwl_scan_offload_profile_cfg *)profile_cfg_v1; + + data = &profile_cfg->data; + } else { + data = &profile_cfg_v1->data; + } + + /* No blocklist configuration */ + data->num_profiles = req->n_match_sets; + data->active_clients = SCAN_CLIENT_SCHED_SCAN; + data->pass_match = SCAN_CLIENT_SCHED_SCAN; + data->match_notify = SCAN_CLIENT_SCHED_SCAN; + + if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) + data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; + + for (i = 0; i < req->n_match_sets; i++) { + profile = &profile_cfg_v1->profiles[i]; + profile->ssid_index = i; + /* Support any cipher and auth algorithm */ + profile->unicast_cipher = 0xff; + profile->auth_alg = IWL_AUTH_ALGO_UNSUPPORTED | + IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X | + IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE; + profile->network_type = IWL_NETWORK_TYPE_ANY; + profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; + profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; + } + + IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + kfree(profile_cfg_v1); +free_blocklist: + kfree(blocklist); + + return ret; +} + +static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, + struct cfg80211_sched_scan_request *req) +{ + if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { + IWL_DEBUG_SCAN(mvm, + "Sending scheduled scan with filtering, n_match_sets %d\n", + req->n_match_sets); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + return false; + } + + IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); + + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; + return true; +} + +static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) +{ + int ret; + struct iwl_host_cmd cmd = { + .id = SCAN_OFFLOAD_ABORT_CMD, + }; + u32 status = CAN_ABORT_STATUS; + + ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); + if (ret) + return ret; + + if (status != CAN_ABORT_STATUS) { + /* + * The scan abort will return 1 for success or + * 2 for "failure". A failure condition can be + * due to simply not being in an active scan which + * can occur if we send the scan abort before the + * microcode has notified us that a scan is completed. + */ + IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); + ret = -ENOENT; + } + + return ret; +} + +static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, + struct iwl_scan_req_tx_cmd *tx_cmd, + bool no_cck) +{ + tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | + TX_CMD_FLG_BT_DIS); + tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, + NL80211_BAND_2GHZ, + no_cck); + + if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) < 12) { + tx_cmd[0].sta_id = mvm->aux_sta.sta_id; + tx_cmd[1].sta_id = mvm->aux_sta.sta_id; + + /* + * Fw doesn't use this sta anymore, pending deprecation via HOST API + * change + */ + } else { + tx_cmd[0].sta_id = 0xff; + tx_cmd[1].sta_id = 0xff; + } + + tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | + TX_CMD_FLG_BT_DIS); + + tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, + NL80211_BAND_5GHZ, + no_cck); +} + +static void +iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, + struct ieee80211_channel **channels, + int n_channels, u32 ssid_bitmap, + struct iwl_scan_req_lmac *cmd) +{ + struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; + int i; + + for (i = 0; i < n_channels; i++) { + channel_cfg[i].channel_num = + cpu_to_le16(channels[i]->hw_value); + channel_cfg[i].iter_count = cpu_to_le16(1); + channel_cfg[i].iter_interval = 0; + channel_cfg[i].flags = + cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | + ssid_bitmap); + } +} + +static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, + size_t len, u8 *const pos) +{ + static const u8 before_ds_params[] = { + WLAN_EID_SSID, + WLAN_EID_SUPP_RATES, + WLAN_EID_REQUEST, + WLAN_EID_EXT_SUPP_RATES, + }; + size_t offs; + u8 *newpos = pos; + + if (!iwl_mvm_rrm_scan_needed(mvm)) { + memcpy(newpos, ies, len); + return newpos + len; + } + + offs = ieee80211_ie_split(ies, len, + before_ds_params, + ARRAY_SIZE(before_ds_params), + 0); + + memcpy(newpos, ies, offs); + newpos += offs; + + /* Add a placeholder for DS Parameter Set element */ + *newpos++ = WLAN_EID_DS_PARAMS; + *newpos++ = 1; + *newpos++ = 0; + + memcpy(newpos, ies + offs, len - offs); + newpos += len - offs; + + return newpos; +} + +#define WFA_TPC_IE_LEN 9 + +static void iwl_mvm_add_tpc_report_ie(u8 *pos) +{ + pos[0] = WLAN_EID_VENDOR_SPECIFIC; + pos[1] = WFA_TPC_IE_LEN - 2; + pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; + pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; + pos[4] = WLAN_OUI_MICROSOFT & 0xff; + pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; + pos[6] = 0; + /* pos[7] - tx power will be inserted by the FW */ + pos[7] = 0; + pos[8] = 0; +} + +static void +iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct ieee80211_scan_ies *ies, + struct iwl_mvm_scan_params *params) +{ + struct ieee80211_mgmt *frame = (void *)params->preq.buf; + u8 *pos, *newpos; + const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? + params->mac_addr : NULL; + + /* + * Unfortunately, right now the offload scan doesn't support randomising + * within the firmware, so until the firmware API is ready we implement + * it in the driver. This means that the scan iterations won't really be + * random, only when it's restarted, but at least that helps a bit. + */ + if (mac_addr) + get_random_mask_addr(frame->sa, mac_addr, + params->mac_addr_mask); + else + memcpy(frame->sa, vif->addr, ETH_ALEN); + + frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); + eth_broadcast_addr(frame->da); + eth_broadcast_addr(frame->bssid); + frame->seq_ctrl = 0; + + pos = frame->u.probe_req.variable; + *pos++ = WLAN_EID_SSID; + *pos++ = 0; + + params->preq.mac_header.offset = 0; + params->preq.mac_header.len = cpu_to_le16(24 + 2); + + /* Insert ds parameter set element on 2.4 GHz band */ + newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, + ies->ies[NL80211_BAND_2GHZ], + ies->len[NL80211_BAND_2GHZ], + pos); + params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); + params->preq.band_data[0].len = cpu_to_le16(newpos - pos); + pos = newpos; + + memcpy(pos, ies->ies[NL80211_BAND_5GHZ], + ies->len[NL80211_BAND_5GHZ]); + params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); + params->preq.band_data[1].len = + cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); + pos += ies->len[NL80211_BAND_5GHZ]; + + memcpy(pos, ies->ies[NL80211_BAND_6GHZ], + ies->len[NL80211_BAND_6GHZ]); + params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf); + params->preq.band_data[2].len = + cpu_to_le16(ies->len[NL80211_BAND_6GHZ]); + pos += ies->len[NL80211_BAND_6GHZ]; + memcpy(pos, ies->common_ies, ies->common_ie_len); + params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); + + if (iwl_mvm_rrm_scan_needed(mvm) && + !fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { + iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); + params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + + WFA_TPC_IE_LEN); + } else { + params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); + } +} + +static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, + struct iwl_scan_req_lmac *cmd, + struct iwl_mvm_scan_params *params) +{ + cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; + cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; + cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; + cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; + cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); + cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); + cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); +} + +static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, + struct ieee80211_scan_ies *ies, + int n_channels) +{ + return ((n_ssids <= PROBE_OPTION_MAX) && + (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & + (ies->common_ie_len + + ies->len[NL80211_BAND_2GHZ] + + ies->len[NL80211_BAND_5GHZ] <= + iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); +} + +static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; + bool low_latency; + + if (iwl_mvm_is_cdb_supported(mvm)) + low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ); + else + low_latency = iwl_mvm_low_latency(mvm); + + /* We can only use EBS if: + * 1. the feature is supported; + * 2. the last EBS was successful; + * 3. if only single scan, the single scan EBS API is supported; + * 4. it's not a p2p find operation. + * 5. we are not in low latency mode, + * or if fragmented ebs is supported by the FW + */ + return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && + mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && + vif->type != NL80211_IFTYPE_P2P_DEVICE && + (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm))); +} + +static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) +{ + return params->n_scan_plans == 1 && + params->scan_plans[0].iterations == 1; +} + +static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type) +{ + return (type == IWL_SCAN_TYPE_FRAGMENTED || + type == IWL_SCAN_TYPE_FAST_BALANCE); +} + +static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + int flags = 0; + + if (params->n_ssids == 0) + flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; + + if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) + flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; + + if (iwl_mvm_is_scan_fragmented(params->type)) + flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; + + if (iwl_mvm_rrm_scan_needed(mvm) && + fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) + flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; + + if (params->pass_all) + flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; + else + flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; + +#ifdef CONFIG_IWLWIFI_DEBUGFS + if (mvm->scan_iter_notif_enabled) + flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; +#endif + + if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) + flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; + + if (iwl_mvm_is_regular_scan(params) && + vif->type != NL80211_IFTYPE_P2P_DEVICE && + !iwl_mvm_is_scan_fragmented(params->type)) + flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; + + return flags; +} + +static void +iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req, + struct iwl_scan_probe_req *src_p_req) +{ + int i; + + p_req->mac_header = src_p_req->mac_header; + for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++) + p_req->band_data[i] = src_p_req->band_data[i]; + p_req->common_data = src_p_req->common_data; + memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf)); +} + +static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params) +{ + struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; + struct iwl_scan_probe_req_v1 *preq = + (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * + mvm->fw->ucode_capa.n_scan_channels); + u32 ssid_bitmap = 0; + int i; + u8 band; + + if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) + return -EINVAL; + + iwl_mvm_scan_lmac_dwell(mvm, cmd, params); + + cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); + cmd->iter_num = cpu_to_le32(1); + cmd->n_channels = (u8)params->n_channels; + + cmd->delay = cpu_to_le32(params->delay); + + cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, + vif)); + + band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band); + cmd->flags = cpu_to_le32(band); + cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | + MAC_FILTER_IN_BEACON); + iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); + iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); + + /* this API uses bits 1-20 instead of 0-19 */ + ssid_bitmap <<= 1; + + for (i = 0; i < params->n_scan_plans; i++) { + struct cfg80211_sched_scan_plan *scan_plan = + ¶ms->scan_plans[i]; + + cmd->schedule[i].delay = + cpu_to_le16(scan_plan->interval); + cmd->schedule[i].iterations = scan_plan->iterations; + cmd->schedule[i].full_scan_mul = 1; + } + + /* + * If the number of iterations of the last scan plan is set to + * zero, it should run infinitely. However, this is not always the case. + * For example, when regular scan is requested the driver sets one scan + * plan with one iteration. + */ + if (!cmd->schedule[i - 1].iterations) + cmd->schedule[i - 1].iterations = 0xff; + + if (iwl_mvm_scan_use_ebs(mvm, vif)) { + cmd->channel_opt[0].flags = + cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | + IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | + IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); + cmd->channel_opt[0].non_ebs_ratio = + cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); + cmd->channel_opt[1].flags = + cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | + IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | + IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); + cmd->channel_opt[1].non_ebs_ratio = + cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); + } + + iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, + params->n_channels, ssid_bitmap, cmd); + + iwl_mvm_scan_set_legacy_probe_req(preq, ¶ms->preq); + + return 0; +} + +static int rate_to_scan_rate_flag(unsigned int rate) +{ + static const int rate_to_scan_rate[IWL_RATE_COUNT] = { + [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, + [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, + [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, + [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, + [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, + [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, + [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, + [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, + [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, + [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, + [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, + [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, + }; + + return rate_to_scan_rate[rate]; +} + +static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) +{ + struct ieee80211_supported_band *band; + unsigned int rates = 0; + int i; + + band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; + for (i = 0; i < band->n_bitrates; i++) + rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); + band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; + for (i = 0; i < band->n_bitrates; i++) + rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); + + /* Set both basic rates and supported rates */ + rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); + + return cpu_to_le32(rates); +} + +static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, + struct iwl_scan_dwell *dwell) +{ + dwell->active = IWL_SCAN_DWELL_ACTIVE; + dwell->passive = IWL_SCAN_DWELL_PASSIVE; + dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; + dwell->extended = IWL_SCAN_DWELL_EXTENDED; +} + +static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels, + u32 max_channels) +{ + struct ieee80211_supported_band *band; + int i, j = 0; + + band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; + for (i = 0; i < band->n_channels && j < max_channels; i++, j++) + channels[j] = band->channels[i].hw_value; + band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; + for (i = 0; i < band->n_channels && j < max_channels; i++, j++) + channels[j] = band->channels[i].hw_value; +} + +static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, + u32 flags, u8 channel_flags, + u32 max_channels) +{ + enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL); + struct iwl_scan_config_v1 *cfg = config; + + cfg->flags = cpu_to_le32(flags); + cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); + cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); + cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); + cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); + cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); + + iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); + + memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); + + /* This function should not be called when using ADD_STA ver >=12 */ + WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12); + + cfg->bcast_sta_id = mvm->aux_sta.sta_id; + cfg->channel_flags = channel_flags; + + iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels); +} + +static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config, + u32 flags, u8 channel_flags, + u32 max_channels) +{ + struct iwl_scan_config_v2 *cfg = config; + + cfg->flags = cpu_to_le32(flags); + cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); + cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); + cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); + + if (iwl_mvm_is_cdb_supported(mvm)) { + enum iwl_mvm_scan_type lb_type, hb_type; + + lb_type = iwl_mvm_get_scan_type_band(mvm, NULL, + NL80211_BAND_2GHZ); + hb_type = iwl_mvm_get_scan_type_band(mvm, NULL, + NL80211_BAND_5GHZ); + + cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(scan_timing[lb_type].max_out_time); + cfg->suspend_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(scan_timing[lb_type].suspend_time); + + cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(scan_timing[hb_type].max_out_time); + cfg->suspend_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(scan_timing[hb_type].suspend_time); + } else { + enum iwl_mvm_scan_type type = + iwl_mvm_get_scan_type(mvm, NULL); + + cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(scan_timing[type].max_out_time); + cfg->suspend_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(scan_timing[type].suspend_time); + } + + iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); + + memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); + + /* This function should not be called when using ADD_STA ver >=12 */ + WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12); + + cfg->bcast_sta_id = mvm->aux_sta.sta_id; + cfg->channel_flags = channel_flags; + + iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels); +} + +static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm) +{ + void *cfg; + int ret, cmd_size; + struct iwl_host_cmd cmd = { + .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD), + }; + enum iwl_mvm_scan_type type; + enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET; + int num_channels = + mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + + mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; + u32 flags; + u8 channel_flags; + + if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) + num_channels = mvm->fw->ucode_capa.n_scan_channels; + + if (iwl_mvm_is_cdb_supported(mvm)) { + type = iwl_mvm_get_scan_type_band(mvm, NULL, + NL80211_BAND_2GHZ); + hb_type = iwl_mvm_get_scan_type_band(mvm, NULL, + NL80211_BAND_5GHZ); + if (type == mvm->scan_type && hb_type == mvm->hb_scan_type) + return 0; + } else { + type = iwl_mvm_get_scan_type(mvm, NULL); + if (type == mvm->scan_type) + return 0; + } + + if (iwl_mvm_cdb_scan_api(mvm)) + cmd_size = sizeof(struct iwl_scan_config_v2); + else + cmd_size = sizeof(struct iwl_scan_config_v1); + cmd_size += mvm->fw->ucode_capa.n_scan_channels; + + cfg = kzalloc(cmd_size, GFP_KERNEL); + if (!cfg) + return -ENOMEM; + + flags = SCAN_CONFIG_FLAG_ACTIVATE | + SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | + SCAN_CONFIG_FLAG_SET_TX_CHAINS | + SCAN_CONFIG_FLAG_SET_RX_CHAINS | + SCAN_CONFIG_FLAG_SET_AUX_STA_ID | + SCAN_CONFIG_FLAG_SET_ALL_TIMES | + SCAN_CONFIG_FLAG_SET_LEGACY_RATES | + SCAN_CONFIG_FLAG_SET_MAC_ADDR | + SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | + SCAN_CONFIG_N_CHANNELS(num_channels) | + (iwl_mvm_is_scan_fragmented(type) ? + SCAN_CONFIG_FLAG_SET_FRAGMENTED : + SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); + + channel_flags = IWL_CHANNEL_FLAG_EBS | + IWL_CHANNEL_FLAG_ACCURATE_EBS | + IWL_CHANNEL_FLAG_EBS_ADD | + IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; + + /* + * Check for fragmented scan on LMAC2 - high band. + * LMAC1 - low band is checked above. + */ + if (iwl_mvm_cdb_scan_api(mvm)) { + if (iwl_mvm_is_cdb_supported(mvm)) + flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ? + SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : + SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; + iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags, + num_channels); + } else { + iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags, + num_channels); + } + + cmd.data[0] = cfg; + cmd.len[0] = cmd_size; + cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; + + IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + if (!ret) { + mvm->scan_type = type; + mvm->hb_scan_type = hb_type; + } + + kfree(cfg); + return ret; +} + +int iwl_mvm_config_scan(struct iwl_mvm *mvm) +{ + struct iwl_scan_config cfg; + struct iwl_host_cmd cmd = { + .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD), + .len[0] = sizeof(cfg), + .data[0] = &cfg, + .dataflags[0] = IWL_HCMD_DFL_NOCOPY, + }; + + if (!iwl_mvm_is_reduced_config_scan_supported(mvm)) + return iwl_mvm_legacy_config_scan(mvm); + + memset(&cfg, 0, sizeof(cfg)); + + if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) < 12) { + cfg.bcast_sta_id = mvm->aux_sta.sta_id; + } else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) { + /* + * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD + * version 5. + */ + cfg.bcast_sta_id = 0xff; + } + + cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); + cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); + + IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); + + return iwl_mvm_send_cmd(mvm, &cmd); +} + +static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) +{ + int i; + + for (i = 0; i < mvm->max_scans; i++) + if (mvm->scan_uid_status[i] == status) + return i; + + return -ENOENT; +} + +static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, + struct iwl_scan_req_umac *cmd, + struct iwl_mvm_scan_params *params) +{ + struct iwl_mvm_scan_timing_params *timing, *hb_timing; + u8 active_dwell, passive_dwell; + + timing = &scan_timing[params->type]; + active_dwell = IWL_SCAN_DWELL_ACTIVE; + passive_dwell = IWL_SCAN_DWELL_PASSIVE; + + if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { + cmd->v7.adwell_default_n_aps_social = + IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; + cmd->v7.adwell_default_n_aps = + IWL_SCAN_ADWELL_DEFAULT_LB_N_APS; + + if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm)) + cmd->v9.adwell_default_hb_n_aps = + IWL_SCAN_ADWELL_DEFAULT_HB_N_APS; + + /* if custom max budget was configured with debugfs */ + if (IWL_MVM_ADWELL_MAX_BUDGET) + cmd->v7.adwell_max_budget = + cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); + else if (params->ssids && params->ssids[0].ssid_len) + cmd->v7.adwell_max_budget = + cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); + else + cmd->v7.adwell_max_budget = + cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); + + cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); + cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->max_out_time); + cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->suspend_time); + + if (iwl_mvm_is_cdb_supported(mvm)) { + hb_timing = &scan_timing[params->hb_type]; + + cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->max_out_time); + cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->suspend_time); + } + + if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { + cmd->v7.active_dwell = active_dwell; + cmd->v7.passive_dwell = passive_dwell; + cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; + } else { + cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; + cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; + if (iwl_mvm_is_cdb_supported(mvm)) { + cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] = + active_dwell; + cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] = + passive_dwell; + } + } + } else { + cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED; + cmd->v1.active_dwell = active_dwell; + cmd->v1.passive_dwell = passive_dwell; + cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; + + if (iwl_mvm_is_cdb_supported(mvm)) { + hb_timing = &scan_timing[params->hb_type]; + + cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->max_out_time); + cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->suspend_time); + } + + if (iwl_mvm_cdb_scan_api(mvm)) { + cmd->v6.scan_priority = + cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); + cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->max_out_time); + cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->suspend_time); + } else { + cmd->v1.scan_priority = + cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); + cmd->v1.max_out_time = + cpu_to_le32(timing->max_out_time); + cmd->v1.suspend_time = + cpu_to_le32(timing->suspend_time); + } + } + + if (iwl_mvm_is_regular_scan(params)) + cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); + else + cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); +} + +static u32 iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params *params) +{ + return iwl_mvm_is_regular_scan(params) ? + IWL_SCAN_PRIORITY_EXT_6 : + IWL_SCAN_PRIORITY_EXT_2; +} + +static void +iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm, + struct iwl_scan_general_params_v11 *general_params, + struct iwl_mvm_scan_params *params) +{ + struct iwl_mvm_scan_timing_params *timing, *hb_timing; + u8 active_dwell, passive_dwell; + + timing = &scan_timing[params->type]; + active_dwell = IWL_SCAN_DWELL_ACTIVE; + passive_dwell = IWL_SCAN_DWELL_PASSIVE; + + general_params->adwell_default_social_chn = + IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; + general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS; + general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS; + + /* if custom max budget was configured with debugfs */ + if (IWL_MVM_ADWELL_MAX_BUDGET) + general_params->adwell_max_budget = + cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); + else if (params->ssids && params->ssids[0].ssid_len) + general_params->adwell_max_budget = + cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); + else + general_params->adwell_max_budget = + cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); + + general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); + general_params->max_out_of_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->max_out_time); + general_params->suspend_time[SCAN_LB_LMAC_IDX] = + cpu_to_le32(timing->suspend_time); + + hb_timing = &scan_timing[params->hb_type]; + + general_params->max_out_of_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->max_out_time); + general_params->suspend_time[SCAN_HB_LMAC_IDX] = + cpu_to_le32(hb_timing->suspend_time); + + general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; + general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; + general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell; + general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell; +} + +struct iwl_mvm_scan_channel_segment { + u8 start_idx; + u8 end_idx; + u8 first_channel_id; + u8 last_channel_id; + u8 channel_spacing_shift; + u8 band; +}; + +static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = { + { + .start_idx = 0, + .end_idx = 13, + .first_channel_id = 1, + .last_channel_id = 14, + .channel_spacing_shift = 0, + .band = PHY_BAND_24 + }, + { + .start_idx = 14, + .end_idx = 41, + .first_channel_id = 36, + .last_channel_id = 144, + .channel_spacing_shift = 2, + .band = PHY_BAND_5 + }, + { + .start_idx = 42, + .end_idx = 50, + .first_channel_id = 149, + .last_channel_id = 181, + .channel_spacing_shift = 2, + .band = PHY_BAND_5 + }, + { + .start_idx = 51, + .end_idx = 111, + .first_channel_id = 1, + .last_channel_id = 241, + .channel_spacing_shift = 2, + .band = PHY_BAND_6 + }, +}; + +static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band) +{ + int i, index; + + if (!channel_id) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) { + const struct iwl_mvm_scan_channel_segment *ch_segment = + &scan_channel_segments[i]; + u32 ch_offset; + + if (ch_segment->band != band || + ch_segment->first_channel_id > channel_id || + ch_segment->last_channel_id < channel_id) + continue; + + ch_offset = (channel_id - ch_segment->first_channel_id) >> + ch_segment->channel_spacing_shift; + + index = scan_channel_segments[i].start_idx + ch_offset; + if (index < IWL_SCAN_NUM_CHANNELS) + return index; + + break; + } + + return -EINVAL; +} + +static const u8 p2p_go_friendly_chs[] = { + 36, 40, 44, 48, 149, 153, 157, 161, 165, +}; + +static const u8 social_chs[] = { + 1, 6, 11 +}; + +static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type, + u8 ch_id, u8 band, u8 *ch_bitmap, + size_t bitmap_n_entries) +{ + int i; + + if (vif_type != NL80211_IFTYPE_P2P_DEVICE) + return; + + for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) { + if (p2p_go_friendly_chs[i] == ch_id) { + int ch_idx, bitmap_idx; + + ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band); + if (ch_idx < 0) + return; + + bitmap_idx = ch_idx / 8; + if (bitmap_idx >= bitmap_n_entries) + return; + + ch_idx = ch_idx % 8; + ch_bitmap[bitmap_idx] |= BIT(ch_idx); + + return; + } + } +} + +static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id) +{ + int i; + u32 flags = 0; + + if (vif_type != NL80211_IFTYPE_P2P_DEVICE) + goto out; + + for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) { + if (p2p_go_friendly_chs[i] == ch_id) { + flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT; + break; + } + } + + if (flags) + goto out; + + for (i = 0; i < ARRAY_SIZE(social_chs); i++) { + if (social_chs[i] == ch_id) { + flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT; + break; + } + } + +out: + return flags; +} + +static void +iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, + struct ieee80211_channel **channels, + int n_channels, u32 flags, + struct iwl_scan_channel_cfg_umac *channel_cfg) +{ + int i; + + for (i = 0; i < n_channels; i++) { + channel_cfg[i].flags = cpu_to_le32(flags); + channel_cfg[i].v1.channel_num = channels[i]->hw_value; + if (iwl_mvm_is_scan_ext_chan_supported(mvm)) { + enum nl80211_band band = channels[i]->band; + + channel_cfg[i].v2.band = + iwl_mvm_phy_band_from_nl80211(band); + channel_cfg[i].v2.iter_count = 1; + channel_cfg[i].v2.iter_interval = 0; + } else { + channel_cfg[i].v1.iter_count = 1; + channel_cfg[i].v1.iter_interval = 0; + } + } +} + +static void +iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm, + struct ieee80211_channel **channels, + struct iwl_scan_channel_params_v4 *cp, + int n_channels, u32 flags, + enum nl80211_iftype vif_type) +{ + u8 *bitmap = cp->adwell_ch_override_bitmap; + size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap); + int i; + + for (i = 0; i < n_channels; i++) { + enum nl80211_band band = channels[i]->band; + struct iwl_scan_channel_cfg_umac *cfg = + &cp->channel_config[i]; + + cfg->flags = cpu_to_le32(flags); + cfg->v2.channel_num = channels[i]->hw_value; + cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band); + cfg->v2.iter_count = 1; + cfg->v2.iter_interval = 0; + + iwl_mvm_scan_ch_add_n_aps_override(vif_type, + cfg->v2.channel_num, + cfg->v2.band, bitmap, + bitmap_n_entries); + } +} + +static void +iwl_mvm_umac_scan_cfg_channels_v6(struct iwl_mvm *mvm, + struct ieee80211_channel **channels, + struct iwl_scan_channel_params_v6 *cp, + int n_channels, u32 flags, + enum nl80211_iftype vif_type) +{ + int i; + + for (i = 0; i < n_channels; i++) { + enum nl80211_band band = channels[i]->band; + struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i]; + u32 n_aps_flag = + iwl_mvm_scan_ch_n_aps_flag(vif_type, + channels[i]->hw_value); + + cfg->flags = cpu_to_le32(flags | n_aps_flag); + cfg->v2.channel_num = channels[i]->hw_value; + cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band); + if (cfg80211_channel_is_psc(channels[i])) + cfg->flags = 0; + cfg->v2.iter_count = 1; + cfg->v2.iter_interval = 0; + } +} + +static void +iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct iwl_scan_probe_params_v4 *pp) +{ + int j, idex_s = 0, idex_b = 0; + struct cfg80211_scan_6ghz_params *scan_6ghz_params = + params->scan_6ghz_params; + bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN); + + for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE; + j++) { + if (!params->ssids[j].ssid_len) + continue; + + pp->short_ssid[idex_s] = + cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid, + params->ssids[j].ssid_len)); + + if (hidden_supported) { + pp->direct_scan[idex_s].id = WLAN_EID_SSID; + pp->direct_scan[idex_s].len = params->ssids[j].ssid_len; + memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid, + params->ssids[j].ssid_len); + } + idex_s++; + } + + /* + * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz + * collocated parameters. This might not be optimal, as this processing + * does not (yet) correspond to the actual channels, so it is possible + * that some entries would be left out. + * + * TODO: improve this logic. + */ + for (j = 0; j < params->n_6ghz_params; j++) { + int k; + + /* First, try to place the short SSID */ + if (scan_6ghz_params[j].short_ssid_valid) { + for (k = 0; k < idex_s; k++) { + if (pp->short_ssid[k] == + cpu_to_le32(scan_6ghz_params[j].short_ssid)) + break; + } + + if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) { + pp->short_ssid[idex_s++] = + cpu_to_le32(scan_6ghz_params[j].short_ssid); + } + } + + /* try to place BSSID for the same entry */ + for (k = 0; k < idex_b; k++) { + if (!memcmp(&pp->bssid_array[k], + scan_6ghz_params[j].bssid, ETH_ALEN)) + break; + } + + if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE) { + memcpy(&pp->bssid_array[idex_b++], + scan_6ghz_params[j].bssid, ETH_ALEN); + } + } + + pp->short_ssid_num = idex_s; + pp->bssid_num = idex_b; +} + +/* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v6 */ +static u32 +iwl_mvm_umac_scan_cfg_channels_v6_6g(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + u32 n_channels, + struct iwl_scan_probe_params_v4 *pp, + struct iwl_scan_channel_params_v6 *cp, + enum nl80211_iftype vif_type) +{ + int i; + struct cfg80211_scan_6ghz_params *scan_6ghz_params = + params->scan_6ghz_params; + u32 ch_cnt; + + for (i = 0, ch_cnt = 0; i < params->n_channels; i++) { + struct iwl_scan_channel_cfg_umac *cfg = + &cp->channel_config[ch_cnt]; + + u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0; + u8 j, k, s_max = 0, b_max = 0, n_used_bssid_entries; + bool force_passive, found = false, allow_passive = true, + unsolicited_probe_on_chan = false, psc_no_listen = false; + + /* + * Avoid performing passive scan on non PSC channels unless the + * scan is specifically a passive scan, i.e., no SSIDs + * configured in the scan command. + */ + if (!cfg80211_channel_is_psc(params->channels[i]) && + !params->n_6ghz_params && params->n_ssids) + continue; + + cfg->v1.channel_num = params->channels[i]->hw_value; + cfg->v2.band = 2; + cfg->v2.iter_count = 1; + cfg->v2.iter_interval = 0; + + /* + * The optimize the scan time, i.e., reduce the scan dwell time + * on each channel, the below logic tries to set 3 direct BSSID + * probe requests for each broadcast probe request with a short + * SSID. + * TODO: improve this logic + */ + n_used_bssid_entries = 3; + for (j = 0; j < params->n_6ghz_params; j++) { + if (!(scan_6ghz_params[j].channel_idx == i)) + continue; + + found = false; + unsolicited_probe_on_chan |= + scan_6ghz_params[j].unsolicited_probe; + psc_no_listen |= scan_6ghz_params[j].psc_no_listen; + + for (k = 0; k < pp->short_ssid_num; k++) { + if (!scan_6ghz_params[j].unsolicited_probe && + le32_to_cpu(pp->short_ssid[k]) == + scan_6ghz_params[j].short_ssid) { + /* Relevant short SSID bit set */ + if (s_ssid_bitmap & BIT(k)) { + found = true; + break; + } + + /* + * Use short SSID only to create a new + * iteration during channel dwell or in + * case that the short SSID has a + * matching SSID, i.e., scan for hidden + * APs. + */ + if (n_used_bssid_entries >= 3) { + s_ssid_bitmap |= BIT(k); + s_max++; + n_used_bssid_entries -= 3; + found = true; + break; + } else if (pp->direct_scan[k].len) { + s_ssid_bitmap |= BIT(k); + s_max++; + found = true; + allow_passive = false; + break; + } + } + } + + if (found) + continue; + + for (k = 0; k < pp->bssid_num; k++) { + if (!memcmp(&pp->bssid_array[k], + scan_6ghz_params[j].bssid, + ETH_ALEN)) { + if (!(bssid_bitmap & BIT(k))) { + bssid_bitmap |= BIT(k); + b_max++; + n_used_bssid_entries++; + } + break; + } + } + } + + if (cfg80211_channel_is_psc(params->channels[i]) && + psc_no_listen) + flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN; + + if (unsolicited_probe_on_chan) + flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES; + + /* + * In the following cases apply passive scan: + * 1. Non fragmented scan: + * - PSC channel with NO_LISTEN_FLAG on should be treated + * like non PSC channel + * - Non PSC channel with more than 3 short SSIDs or more + * than 9 BSSIDs. + * - Non PSC Channel with unsolicited probe response and + * more than 2 short SSIDs or more than 6 BSSIDs. + * - PSC channel with more than 2 short SSIDs or more than + * 6 BSSIDs. + * 3. Fragmented scan: + * - PSC channel with more than 1 SSID or 3 BSSIDs. + * - Non PSC channel with more than 2 SSIDs or 6 BSSIDs. + * - Non PSC channel with unsolicited probe response and + * more than 1 SSID or more than 3 BSSIDs. + */ + if (!iwl_mvm_is_scan_fragmented(params->type)) { + if (!cfg80211_channel_is_psc(params->channels[i]) || + flags & IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN) { + force_passive = (s_max > 3 || b_max > 9); + force_passive |= (unsolicited_probe_on_chan && + (s_max > 2 || b_max > 6)); + } else { + force_passive = (s_max > 2 || b_max > 6); + } + } else if (cfg80211_channel_is_psc(params->channels[i])) { + force_passive = (s_max > 1 || b_max > 3); + } else { + force_passive = (s_max > 2 || b_max > 6); + force_passive |= (unsolicited_probe_on_chan && + (s_max > 1 || b_max > 3)); + } + if ((allow_passive && force_passive) || + (!(bssid_bitmap | s_ssid_bitmap) && + !cfg80211_channel_is_psc(params->channels[i]))) + flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE; + else + flags |= bssid_bitmap | (s_ssid_bitmap << 16); + + cfg->flags |= cpu_to_le32(flags); + ch_cnt++; + } + + if (params->n_channels > ch_cnt) + IWL_DEBUG_SCAN(mvm, + "6GHz: reducing number channels: (%u->%u)\n", + params->n_channels, ch_cnt); + + return ch_cnt; +} + +static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + u8 flags = 0; + + flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER; + + if (iwl_mvm_scan_use_ebs(mvm, vif)) + flags |= IWL_SCAN_CHANNEL_FLAG_EBS | + IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | + IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; + + /* set fragmented ebs for fragmented scan on HB channels */ + if ((!iwl_mvm_is_cdb_supported(mvm) && + iwl_mvm_is_scan_fragmented(params->type)) || + (iwl_mvm_is_cdb_supported(mvm) && + iwl_mvm_is_scan_fragmented(params->hb_type))) + flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG; + + /* + * force EBS in case the scan is a fragmented and there is a need to take P2P + * GO operation into consideration during scan operation. + */ + if ((!iwl_mvm_is_cdb_supported(mvm) && + iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) || + (iwl_mvm_is_cdb_supported(mvm) && + iwl_mvm_is_scan_fragmented(params->hb_type) && + params->respect_p2p_go_hb)) { + IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n"); + flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS; + } + + return flags; +} + +static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + struct ieee80211_supported_band *sband = + &mvm->nvm_data->bands[NL80211_BAND_6GHZ]; + u32 n_disabled, i; + + params->enable_6ghz_passive = false; + + if (params->scan_6ghz) + return; + + if (!fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: Not supported by FW\n"); + return; + } + + /* 6GHz passive scan allowed only on station interface */ + if (vif->type != NL80211_IFTYPE_STATION) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: not station interface\n"); + return; + } + + /* + * 6GHz passive scan is allowed in a defined time interval following HW + * reset or resume flow, or while not associated and a large interval + * has passed since the last 6GHz passive scan. + */ + if ((vif->cfg.assoc || + time_after(mvm->last_6ghz_passive_scan_jiffies + + (IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) && + (time_before(mvm->last_reset_or_resume_time_jiffies + + (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ), + jiffies))) { + IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n", + vif->cfg.assoc ? "associated" : + "timeout did not expire"); + return; + } + + /* not enough channels in the regular scan request */ + if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: not enough channels\n"); + return; + } + + for (i = 0; i < params->n_ssids; i++) { + if (!params->ssids[i].ssid_len) + break; + } + + /* not a wildcard scan, so cannot enable passive 6GHz scan */ + if (i == params->n_ssids) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: no wildcard SSID\n"); + return; + } + + if (!sband || !sband->n_channels) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: no 6GHz channels\n"); + return; + } + + for (i = 0, n_disabled = 0; i < sband->n_channels; i++) { + if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED)) + n_disabled++; + } + + /* + * Not all the 6GHz channels are disabled, so no need for 6GHz passive + * scan + */ + if (n_disabled != sband->n_channels) { + IWL_DEBUG_SCAN(mvm, + "6GHz passive scan: 6GHz channels enabled\n"); + return; + } + + /* all conditions to enable 6ghz passive scan are satisfied */ + IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n"); + params->enable_6ghz_passive = true; +} + +static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif, + int type) +{ + u16 flags = 0; + + /* + * If no direct SSIDs are provided perform a passive scan. Otherwise, + * if there is a single SSID which is not the broadcast SSID, assume + * that the scan is intended for roaming purposes and thus enable Rx on + * all chains to improve chances of hearing the beacons/probe responses. + */ + if (params->n_ssids == 0) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE; + else if (params->n_ssids == 1 && params->ssids[0].ssid_len) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS; + + if (iwl_mvm_is_scan_fragmented(params->type)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1; + + if (iwl_mvm_is_scan_fragmented(params->hb_type)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2; + + if (params->pass_all) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL; + else + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH; + + if (!iwl_mvm_is_regular_scan(params)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC; + + if (params->iter_notif || + mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE; + + if (IWL_MVM_ADWELL_ENABLE) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL; + + if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE; + + if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) && + params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN; + + if (params->enable_6ghz_passive) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN; + + if (iwl_mvm_is_oce_supported(mvm) && + (params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP | + NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE | + NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE; + + return flags; +} + +static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif, int type) +{ + u8 flags = 0; + + if (iwl_mvm_is_cdb_supported(mvm)) { + if (params->respect_p2p_go) + flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB; + if (params->respect_p2p_go_hb) + flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB; + } else { + if (params->respect_p2p_go) + flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB | + IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB; + } + + return flags; +} + +static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + u16 flags = 0; + + if (params->n_ssids == 0) + flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; + + if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; + + if (iwl_mvm_is_scan_fragmented(params->type)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; + + if (iwl_mvm_is_cdb_supported(mvm) && + iwl_mvm_is_scan_fragmented(params->hb_type)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; + + if (iwl_mvm_rrm_scan_needed(mvm) && + fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; + + if (params->pass_all) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; + else + flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; + + if (!iwl_mvm_is_regular_scan(params)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; + + if (params->iter_notif) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; + +#ifdef CONFIG_IWLWIFI_DEBUGFS + if (mvm->scan_iter_notif_enabled) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; +#endif + + if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; + + if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL; + + /* + * Extended dwell is relevant only for low band to start with, as it is + * being used for social channles only (1, 6, 11), so we can check + * only scan type on low band also for CDB. + */ + if (iwl_mvm_is_regular_scan(params) && + vif->type != NL80211_IFTYPE_P2P_DEVICE && + !iwl_mvm_is_scan_fragmented(params->type) && + !iwl_mvm_is_adaptive_dwell_supported(mvm) && + !iwl_mvm_is_oce_supported(mvm)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; + + if (iwl_mvm_is_oce_supported(mvm)) { + if ((params->flags & + NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE; + /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and + * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares + * the same bit, we need to make sure that we use this bit here + * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be + * used. */ + if ((params->flags & + NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) && + !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm))) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP; + if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)) + flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME; + } + + return flags; +} + +static int +iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params, + struct iwl_scan_umac_schedule *schedule, + __le16 *delay) +{ + int i; + if (WARN_ON(!params->n_scan_plans || + params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) + return -EINVAL; + + for (i = 0; i < params->n_scan_plans; i++) { + struct cfg80211_sched_scan_plan *scan_plan = + ¶ms->scan_plans[i]; + + schedule[i].iter_count = scan_plan->iterations; + schedule[i].interval = + cpu_to_le16(scan_plan->interval); + } + + /* + * If the number of iterations of the last scan plan is set to + * zero, it should run infinitely. However, this is not always the case. + * For example, when regular scan is requested the driver sets one scan + * plan with one iteration. + */ + if (!schedule[params->n_scan_plans - 1].iter_count) + schedule[params->n_scan_plans - 1].iter_count = 0xff; + + *delay = cpu_to_le16(params->delay); + + return 0; +} + +static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, + int type, int uid) +{ + struct iwl_scan_req_umac *cmd = mvm->scan_cmd; + struct iwl_scan_umac_chan_param *chan_param; + void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); + void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) * + mvm->fw->ucode_capa.n_scan_channels; + struct iwl_scan_req_umac_tail_v2 *tail_v2 = + (struct iwl_scan_req_umac_tail_v2 *)sec_part; + struct iwl_scan_req_umac_tail_v1 *tail_v1; + struct iwl_ssid_ie *direct_scan; + int ret = 0; + u32 ssid_bitmap = 0; + u8 channel_flags = 0; + u16 gen_flags; + struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); + + chan_param = iwl_mvm_get_scan_req_umac_channel(mvm); + + iwl_mvm_scan_umac_dwell(mvm, cmd, params); + + mvm->scan_uid_status[uid] = type; + + cmd->uid = cpu_to_le32(uid); + gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif); + cmd->general_flags = cpu_to_le16(gen_flags); + if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { + if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED) + cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] = + IWL_SCAN_NUM_OF_FRAGS; + if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED) + cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] = + IWL_SCAN_NUM_OF_FRAGS; + + cmd->v8.general_flags2 = + IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER; + } + + cmd->scan_start_mac_id = scan_vif->id; + + if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) + cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); + + if (iwl_mvm_scan_use_ebs(mvm, vif)) { + channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | + IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | + IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; + + /* set fragmented ebs for fragmented scan on HB channels */ + if (iwl_mvm_is_frag_ebs_supported(mvm)) { + if (gen_flags & + IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED || + (!iwl_mvm_is_cdb_supported(mvm) && + gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)) + channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG; + } + } + + chan_param->flags = channel_flags; + chan_param->count = params->n_channels; + + ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule, + &tail_v2->delay); + if (ret) { + mvm->scan_uid_status[uid] = 0; + return ret; + } + + if (iwl_mvm_is_scan_ext_chan_supported(mvm)) { + tail_v2->preq = params->preq; + direct_scan = tail_v2->direct_scan; + } else { + tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part; + iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq, + ¶ms->preq); + direct_scan = tail_v1->direct_scan; + } + iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap); + iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, + params->n_channels, ssid_bitmap, + cmd_data); + return 0; +} + +static void +iwl_mvm_scan_umac_fill_general_p_v11(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif, + struct iwl_scan_general_params_v11 *gp, + u16 gen_flags, u8 gen_flags2) +{ + struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); + + iwl_mvm_scan_umac_dwell_v11(mvm, gp, params); + + IWL_DEBUG_SCAN(mvm, "Gerenal: flags=0x%x, flags2=0x%x\n", + gen_flags, gen_flags2); + + gp->flags = cpu_to_le16(gen_flags); + gp->flags2 = gen_flags2; + + if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1) + gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS; + if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2) + gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS; + + gp->scan_start_mac_id = scan_vif->id; +} + +static void +iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params, + struct iwl_scan_probe_params_v3 *pp) +{ + pp->preq = params->preq; + pp->ssid_num = params->n_ssids; + iwl_scan_build_ssids(params, pp->direct_scan, NULL); +} + +static void +iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params, + struct iwl_scan_probe_params_v4 *pp, + u32 *bitmap_ssid) +{ + pp->preq = params->preq; + iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid); +} + +static void +iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif, + struct iwl_scan_channel_params_v4 *cp, + u32 channel_cfg_flags) +{ + cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif); + cp->count = params->n_channels; + cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY; + + iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp, + params->n_channels, + channel_cfg_flags, + vif->type); +} + +static void +iwl_mvm_scan_umac_fill_ch_p_v6(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif, + struct iwl_scan_channel_params_v6 *cp, + u32 channel_cfg_flags) +{ + cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif); + cp->count = params->n_channels; + cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY; + cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS; + + iwl_mvm_umac_scan_cfg_channels_v6(mvm, params->channels, cp, + params->n_channels, + channel_cfg_flags, + vif->type); + + if (params->enable_6ghz_passive) { + struct ieee80211_supported_band *sband = + &mvm->nvm_data->bands[NL80211_BAND_6GHZ]; + u32 i; + + for (i = 0; i < sband->n_channels; i++) { + struct ieee80211_channel *channel = + &sband->channels[i]; + + struct iwl_scan_channel_cfg_umac *cfg = + &cp->channel_config[cp->count]; + + if (!cfg80211_channel_is_psc(channel)) + continue; + + cfg->flags = 0; + cfg->v2.channel_num = channel->hw_value; + cfg->v2.band = PHY_BAND_6; + cfg->v2.iter_count = 1; + cfg->v2.iter_interval = 0; + cp->count++; + } + } +} + +static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, int type, + int uid) +{ + struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd; + struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params; + int ret; + u16 gen_flags; + + mvm->scan_uid_status[uid] = type; + + cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params)); + cmd->uid = cpu_to_le32(uid); + + gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type); + iwl_mvm_scan_umac_fill_general_p_v11(mvm, params, vif, + &scan_p->general_params, + gen_flags, 0); + + ret = iwl_mvm_fill_scan_sched_params(params, + scan_p->periodic_params.schedule, + &scan_p->periodic_params.delay); + if (ret) + return ret; + + iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params); + iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif, + &scan_p->channel_params, 0); + + return 0; +} + +static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, + int type, int uid, u32 version) +{ + struct iwl_scan_req_umac_v15 *cmd = mvm->scan_cmd; + struct iwl_scan_req_params_v15 *scan_p = &cmd->scan_params; + struct iwl_scan_channel_params_v6 *cp = &scan_p->channel_params; + struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params; + int ret; + u16 gen_flags; + u8 gen_flags2; + u32 bitmap_ssid = 0; + + mvm->scan_uid_status[uid] = type; + + cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params)); + cmd->uid = cpu_to_le32(uid); + + gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type); + + if (version >= 15) + gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type); + else + gen_flags2 = 0; + + iwl_mvm_scan_umac_fill_general_p_v11(mvm, params, vif, + &scan_p->general_params, + gen_flags, gen_flags2); + + ret = iwl_mvm_fill_scan_sched_params(params, + scan_p->periodic_params.schedule, + &scan_p->periodic_params.delay); + if (ret) + return ret; + + if (!params->scan_6ghz) { + iwl_mvm_scan_umac_fill_probe_p_v4(params, &scan_p->probe_params, + &bitmap_ssid); + iwl_mvm_scan_umac_fill_ch_p_v6(mvm, params, vif, + &scan_p->channel_params, bitmap_ssid); + + return 0; + } else { + pb->preq = params->preq; + } + + cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif); + cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY; + cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS; + + iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb); + + cp->count = iwl_mvm_umac_scan_cfg_channels_v6_6g(mvm, params, + params->n_channels, + pb, cp, vif->type); + if (!cp->count) { + mvm->scan_uid_status[uid] = 0; + return -EINVAL; + } + + if (!params->n_ssids || + (params->n_ssids == 1 && !params->ssids[0].ssid_len)) + cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER; + + return 0; +} + +static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, int type, + int uid) +{ + return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14); +} + +static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, int type, + int uid) +{ + return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15); +} + +static int iwl_mvm_num_scans(struct iwl_mvm *mvm) +{ + return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); +} + +static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) +{ + bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); + + /* This looks a bit arbitrary, but the idea is that if we run + * out of possible simultaneous scans and the userspace is + * trying to run a scan type that is already running, we + * return -EBUSY. But if the userspace wants to start a + * different type of scan, we stop the opposite type to make + * space for the new request. The reason is backwards + * compatibility with old wpa_supplicant that wouldn't stop a + * scheduled scan before starting a normal scan. + */ + + /* FW supports only a single periodic scan */ + if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) && + mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT)) + return -EBUSY; + + if (iwl_mvm_num_scans(mvm) < mvm->max_scans) + return 0; + + /* Use a switch, even though this is a bitmask, so that more + * than one bits set will fall in default and we will warn. + */ + switch (type) { + case IWL_MVM_SCAN_REGULAR: + if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) + return -EBUSY; + return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); + case IWL_MVM_SCAN_SCHED: + if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) + return -EBUSY; + return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); + case IWL_MVM_SCAN_NETDETECT: + /* For non-unified images, there's no need to stop + * anything for net-detect since the firmware is + * restarted anyway. This way, any sched scans that + * were running will be restarted when we resume. + */ + if (!unified_image) + return 0; + + /* If this is a unified image and we ran out of scans, + * we need to stop something. Prefer stopping regular + * scans, because the results are useless at this + * point, and we should be able to keep running + * another scheduled scan while suspended. + */ + if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) + return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, + true); + if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) + return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, + true); + /* Something is wrong if no scan was running but we + * ran out of scans. + */ + fallthrough; + default: + WARN_ON(1); + break; + } + + return -EIO; +} + +#define SCAN_TIMEOUT 30000 + +void iwl_mvm_scan_timeout_wk(struct work_struct *work) +{ + struct delayed_work *delayed_work = to_delayed_work(work); + struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, + scan_timeout_dwork); + + IWL_ERR(mvm, "regular scan timed out\n"); + + iwl_force_nmi(mvm->trans); +} + +static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + if (iwl_mvm_is_cdb_supported(mvm)) { + params->type = + iwl_mvm_get_scan_type_band(mvm, vif, + NL80211_BAND_2GHZ); + params->hb_type = + iwl_mvm_get_scan_type_band(mvm, vif, + NL80211_BAND_5GHZ); + } else { + params->type = iwl_mvm_get_scan_type(mvm, vif); + } +} + +struct iwl_scan_umac_handler { + u8 version; + int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct iwl_mvm_scan_params *params, int type, int uid); +}; + +#define IWL_SCAN_UMAC_HANDLER(_ver) { \ + .version = _ver, \ + .handler = iwl_mvm_scan_umac_v##_ver, \ +} + +static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = { + /* set the newest version first to shorten the list traverse time */ + IWL_SCAN_UMAC_HANDLER(15), + IWL_SCAN_UMAC_HANDLER(14), + IWL_SCAN_UMAC_HANDLER(12), +}; + +static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct iwl_host_cmd *hcmd, + struct iwl_mvm_scan_params *params, + int type) +{ + int uid, i, err; + u8 scan_ver; + + lockdep_assert_held(&mvm->mutex); + memset(mvm->scan_cmd, 0, mvm->scan_cmd_size); + + if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { + hcmd->id = SCAN_OFFLOAD_REQUEST_CMD; + + return iwl_mvm_scan_lmac(mvm, vif, params); + } + + uid = iwl_mvm_scan_uid_by_status(mvm, 0); + if (uid < 0) + return uid; + + hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC); + + scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC, + IWL_FW_CMD_VER_UNKNOWN); + + for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) { + const struct iwl_scan_umac_handler *ver_handler = + &iwl_scan_umac_handlers[i]; + + if (ver_handler->version != scan_ver) + continue; + + return ver_handler->handler(mvm, vif, params, type, uid); + } + + err = iwl_mvm_scan_umac(mvm, vif, params, type, uid); + if (err) + return err; + + return uid; +} + +struct iwl_mvm_scan_respect_p2p_go_iter_data { + struct ieee80211_vif *current_vif; + bool p2p_go; + enum nl80211_band band; +}; + +static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + /* exclude the given vif */ + if (vif == data->current_vif) + return; + + if (vif->type == NL80211_IFTYPE_AP && vif->p2p && + mvmvif->phy_ctxt->id < NUM_PHY_CTX && + (data->band == NUM_NL80211_BANDS || + mvmvif->phy_ctxt->channel->band == data->band)) + data->p2p_go = true; +} + +static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + bool low_latency, + enum nl80211_band band) +{ + struct iwl_mvm_scan_respect_p2p_go_iter_data data = { + .current_vif = vif, + .p2p_go = false, + .band = band, + }; + + if (!low_latency) + return false; + + ieee80211_iterate_active_interfaces_atomic(mvm->hw, + IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_scan_respect_p2p_go_iter, + &data); + + return data.p2p_go; +} + +static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + enum nl80211_band band) +{ + bool low_latency = iwl_mvm_low_latency_band(mvm, band); + + return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band); +} + +static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + bool low_latency = iwl_mvm_low_latency(mvm); + + return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, + NUM_NL80211_BANDS); +} + +static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm, + struct iwl_mvm_scan_params *params, + struct ieee80211_vif *vif) +{ + if (iwl_mvm_is_cdb_supported(mvm)) { + params->respect_p2p_go = + iwl_mvm_get_respect_p2p_go_band(mvm, vif, + NL80211_BAND_2GHZ); + params->respect_p2p_go_hb = + iwl_mvm_get_respect_p2p_go_band(mvm, vif, + NL80211_BAND_5GHZ); + } else { + params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif); + } +} + +int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + struct cfg80211_scan_request *req, + struct ieee80211_scan_ies *ies) +{ + struct iwl_host_cmd hcmd = { + .len = { iwl_mvm_scan_size(mvm), }, + .data = { mvm->scan_cmd, }, + .dataflags = { IWL_HCMD_DFL_NOCOPY, }, + }; + struct iwl_mvm_scan_params params = {}; + int ret, uid; + struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; + + lockdep_assert_held(&mvm->mutex); + + if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { + IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); + return -EBUSY; + } + + ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); + if (ret) + return ret; + + /* we should have failed registration if scan_cmd was NULL */ + if (WARN_ON(!mvm->scan_cmd)) + return -ENOMEM; + + if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) + return -ENOBUFS; + + params.n_ssids = req->n_ssids; + params.flags = req->flags; + params.n_channels = req->n_channels; + params.delay = 0; + params.ssids = req->ssids; + params.channels = req->channels; + params.mac_addr = req->mac_addr; + params.mac_addr_mask = req->mac_addr_mask; + params.no_cck = req->no_cck; + params.pass_all = true; + params.n_match_sets = 0; + params.match_sets = NULL; + + params.scan_plans = &scan_plan; + params.n_scan_plans = 1; + + params.n_6ghz_params = req->n_6ghz_params; + params.scan_6ghz_params = req->scan_6ghz_params; + params.scan_6ghz = req->scan_6ghz; + iwl_mvm_fill_scan_type(mvm, ¶ms, vif); + iwl_mvm_fill_respect_p2p_go(mvm, ¶ms, vif); + + if (req->duration) + params.iter_notif = true; + + iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); + + iwl_mvm_scan_6ghz_passive_scan(mvm, ¶ms, vif); + + uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, ¶ms, + IWL_MVM_SCAN_REGULAR); + + if (uid < 0) + return uid; + + iwl_mvm_pause_tcm(mvm, false); + + ret = iwl_mvm_send_cmd(mvm, &hcmd); + if (ret) { + /* If the scan failed, it usually means that the FW was unable + * to allocate the time events. Warn on it, but maybe we + * should try to send the command again with different params. + */ + IWL_ERR(mvm, "Scan failed! ret %d\n", ret); + iwl_mvm_resume_tcm(mvm); + mvm->scan_uid_status[uid] = 0; + return ret; + } + + IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); + mvm->scan_status |= IWL_MVM_SCAN_REGULAR; + mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); + + if (params.enable_6ghz_passive) + mvm->last_6ghz_passive_scan_jiffies = jiffies; + + schedule_delayed_work(&mvm->scan_timeout_dwork, + msecs_to_jiffies(SCAN_TIMEOUT)); + + return 0; +} + +int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_scan_ies *ies, + int type) +{ + struct iwl_host_cmd hcmd = { + .len = { iwl_mvm_scan_size(mvm), }, + .data = { mvm->scan_cmd, }, + .dataflags = { IWL_HCMD_DFL_NOCOPY, }, + }; + struct iwl_mvm_scan_params params = {}; + int ret, uid; + int i, j; + bool non_psc_included = false; + + lockdep_assert_held(&mvm->mutex); + + if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { + IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); + return -EBUSY; + } + + ret = iwl_mvm_check_running_scans(mvm, type); + if (ret) + return ret; + + /* we should have failed registration if scan_cmd was NULL */ + if (WARN_ON(!mvm->scan_cmd)) + return -ENOMEM; + + + params.n_ssids = req->n_ssids; + params.flags = req->flags; + params.n_channels = req->n_channels; + params.ssids = req->ssids; + params.channels = req->channels; + params.mac_addr = req->mac_addr; + params.mac_addr_mask = req->mac_addr_mask; + params.no_cck = false; + params.pass_all = iwl_mvm_scan_pass_all(mvm, req); + params.n_match_sets = req->n_match_sets; + params.match_sets = req->match_sets; + if (!req->n_scan_plans) + return -EINVAL; + + params.n_scan_plans = req->n_scan_plans; + params.scan_plans = req->scan_plans; + + iwl_mvm_fill_scan_type(mvm, ¶ms, vif); + iwl_mvm_fill_respect_p2p_go(mvm, ¶ms, vif); + + /* 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 + * and to keep it aligned with UMAC scans (which only support + * 16-bit delays), trim it down to 16-bits. + */ + if (req->delay > U16_MAX) { + IWL_DEBUG_SCAN(mvm, + "delay value is > 16-bits, set to max possible\n"); + params.delay = U16_MAX; + } else { + params.delay = req->delay; + } + + ret = iwl_mvm_config_sched_scan_profiles(mvm, req); + if (ret) + return ret; + + iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); + + /* for 6 GHZ band only PSC channels need to be added */ + for (i = 0; i < params.n_channels; i++) { + struct ieee80211_channel *channel = params.channels[i]; + + if (channel->band == NL80211_BAND_6GHZ && + !cfg80211_channel_is_psc(channel)) { + non_psc_included = true; + break; + } + } + + if (non_psc_included) { + params.channels = kmemdup(params.channels, + sizeof(params.channels[0]) * + params.n_channels, + GFP_KERNEL); + if (!params.channels) + return -ENOMEM; + + for (i = j = 0; i < params.n_channels; i++) { + if (params.channels[i]->band == NL80211_BAND_6GHZ && + !cfg80211_channel_is_psc(params.channels[i])) + continue; + params.channels[j++] = params.channels[i]; + } + params.n_channels = j; + } + + if (non_psc_included && + !iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) { + kfree(params.channels); + return -ENOBUFS; + } + + uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, ¶ms, type); + + if (non_psc_included) + kfree(params.channels); + if (uid < 0) + return uid; + + ret = iwl_mvm_send_cmd(mvm, &hcmd); + if (!ret) { + IWL_DEBUG_SCAN(mvm, + "Sched scan request was sent successfully\n"); + mvm->scan_status |= type; + } else { + /* If the scan failed, it usually means that the FW was unable + * to allocate the time events. Warn on it, but maybe we + * should try to send the command again with different params. + */ + IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); + mvm->scan_uid_status[uid] = 0; + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + } + + return ret; +} + +void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_umac_scan_complete *notif = (void *)pkt->data; + u32 uid = __le32_to_cpu(notif->uid); + bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); + + if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) + return; + + /* if the scan is already stopping, we don't need to notify mac80211 */ + if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { + struct cfg80211_scan_info info = { + .aborted = aborted, + .scan_start_tsf = mvm->scan_start, + }; + + memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); + ieee80211_scan_completed(mvm->hw, &info); + mvm->scan_vif = NULL; + cancel_delayed_work(&mvm->scan_timeout_dwork); + iwl_mvm_resume_tcm(mvm); + } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { + ieee80211_sched_scan_stopped(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + } + + mvm->scan_status &= ~mvm->scan_uid_status[uid]; + IWL_DEBUG_SCAN(mvm, + "Scan completed, uid %u type %u, status %s, EBS status %s\n", + uid, mvm->scan_uid_status[uid], + notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? + "completed" : "aborted", + iwl_mvm_ebs_status_str(notif->ebs_status)); + IWL_DEBUG_SCAN(mvm, + "Last line %d, Last iteration %d, Time from last iteration %d\n", + notif->last_schedule, notif->last_iter, + __le32_to_cpu(notif->time_from_last_iter)); + + if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && + notif->ebs_status != IWL_SCAN_EBS_INACTIVE) + mvm->last_ebs_successful = false; + + mvm->scan_uid_status[uid] = 0; +} + +void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; + + mvm->scan_start = le64_to_cpu(notif->start_tsf); + + IWL_DEBUG_SCAN(mvm, + "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", + notif->status, notif->scanned_channels); + + if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { + IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); + ieee80211_sched_scan_results(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; + } + + IWL_DEBUG_SCAN(mvm, + "UMAC Scan iteration complete: scan started at %llu (TSF)\n", + mvm->scan_start); +} + +static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) +{ + struct iwl_umac_scan_abort cmd = {}; + int uid, ret; + + lockdep_assert_held(&mvm->mutex); + + /* We should always get a valid index here, because we already + * checked that this type of scan was running in the generic + * code. + */ + uid = iwl_mvm_scan_uid_by_status(mvm, type); + if (WARN_ON_ONCE(uid < 0)) + return uid; + + cmd.uid = cpu_to_le32(uid); + + IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); + + ret = iwl_mvm_send_cmd_pdu(mvm, + WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC), + 0, sizeof(cmd), &cmd); + if (!ret) + mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; + + return ret; +} + +static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) +{ + struct iwl_notification_wait wait_scan_done; + static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, + SCAN_OFFLOAD_COMPLETE, }; + int ret; + + lockdep_assert_held(&mvm->mutex); + + iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, + scan_done_notif, + ARRAY_SIZE(scan_done_notif), + NULL, NULL); + + IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); + + if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) + ret = iwl_mvm_umac_scan_abort(mvm, type); + else + ret = iwl_mvm_lmac_scan_abort(mvm); + + if (ret) { + IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); + iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); + return ret; + } + + return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, + 1 * HZ); +} + +static size_t iwl_scan_req_umac_get_size(u8 scan_ver) +{ + switch (scan_ver) { + case 12: + return sizeof(struct iwl_scan_req_umac_v12); + case 14: + case 15: + return sizeof(struct iwl_scan_req_umac_v15); + } + + return 0; +} + +size_t iwl_mvm_scan_size(struct iwl_mvm *mvm) +{ + int base_size, tail_size; + u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC, + IWL_FW_CMD_VER_UNKNOWN); + + base_size = iwl_scan_req_umac_get_size(scan_ver); + if (base_size) + return base_size; + + + if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) + base_size = IWL_SCAN_REQ_UMAC_SIZE_V8; + else if (iwl_mvm_is_adaptive_dwell_supported(mvm)) + base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; + else if (iwl_mvm_cdb_scan_api(mvm)) + base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; + else + base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; + + if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { + if (iwl_mvm_is_scan_ext_chan_supported(mvm)) + tail_size = sizeof(struct iwl_scan_req_umac_tail_v2); + else + tail_size = sizeof(struct iwl_scan_req_umac_tail_v1); + + return base_size + + sizeof(struct iwl_scan_channel_cfg_umac) * + mvm->fw->ucode_capa.n_scan_channels + + tail_size; + } + return sizeof(struct iwl_scan_req_lmac) + + sizeof(struct iwl_scan_channel_cfg_lmac) * + mvm->fw->ucode_capa.n_scan_channels + + sizeof(struct iwl_scan_probe_req_v1); +} + +/* + * This function is used in nic restart flow, to inform mac80211 about scans + * that was aborted by restart flow or by an assert. + */ +void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) +{ + if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { + int uid, i; + + uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); + if (uid >= 0) { + struct cfg80211_scan_info info = { + .aborted = true, + }; + + cancel_delayed_work(&mvm->scan_timeout_dwork); + + ieee80211_scan_completed(mvm->hw, &info); + mvm->scan_uid_status[uid] = 0; + } + uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); + if (uid >= 0) { + /* Sched scan will be restarted by mac80211 in + * restart_hw, so do not report if FW is about to be + * restarted. + */ + if (!mvm->fw_restart) + ieee80211_sched_scan_stopped(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + mvm->scan_uid_status[uid] = 0; + } + uid = iwl_mvm_scan_uid_by_status(mvm, + IWL_MVM_SCAN_STOPPING_REGULAR); + if (uid >= 0) + mvm->scan_uid_status[uid] = 0; + + uid = iwl_mvm_scan_uid_by_status(mvm, + IWL_MVM_SCAN_STOPPING_SCHED); + if (uid >= 0) + mvm->scan_uid_status[uid] = 0; + + /* We shouldn't have any UIDs still set. Loop over all the + * UIDs to make sure there's nothing left there and warn if + * any is found. + */ + for (i = 0; i < mvm->max_scans; i++) { + if (WARN_ONCE(mvm->scan_uid_status[i], + "UMAC scan UID %d status was not cleaned\n", + i)) + mvm->scan_uid_status[i] = 0; + } + } else { + if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { + struct cfg80211_scan_info info = { + .aborted = true, + }; + + cancel_delayed_work(&mvm->scan_timeout_dwork); + ieee80211_scan_completed(mvm->hw, &info); + } + + /* Sched scan will be restarted by mac80211 in + * restart_hw, so do not report if FW is about to be + * restarted. + */ + if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && + !mvm->fw_restart) { + ieee80211_sched_scan_stopped(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + } + } +} + +int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) +{ + int ret; + + if (!(mvm->scan_status & type)) + return 0; + + if (iwl_mvm_is_radio_killed(mvm)) { + ret = 0; + goto out; + } + + ret = iwl_mvm_scan_stop_wait(mvm, type); + if (!ret) + mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; +out: + /* Clear the scan status so the next scan requests will + * succeed and mark the scan as stopping, so that the Rx + * handler doesn't do anything, as the scan was stopped from + * above. + */ + mvm->scan_status &= ~type; + + if (type == IWL_MVM_SCAN_REGULAR) { + cancel_delayed_work(&mvm->scan_timeout_dwork); + if (notify) { + struct cfg80211_scan_info info = { + .aborted = true, + }; + + ieee80211_scan_completed(mvm->hw, &info); + } + } else if (notify) { + ieee80211_sched_scan_stopped(mvm->hw); + mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; + } + + return ret; +} |