/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #include #include #include "mvm.h" #include "iwl-eeprom-parse.h" #include "fw-api-scan.h" #define IWL_PLCP_QUIET_THRESH 1 #define IWL_ACTIVE_QUIET_TIME 10 #define IWL_DENSE_EBS_SCAN_RATIO 5 #define IWL_SPARSE_EBS_SCAN_RATIO 1 struct iwl_mvm_scan_params { u32 max_out_time; u32 suspend_time; bool passive_fragmented; u32 n_channels; u32 delay; int n_ssids; struct cfg80211_ssid *ssids; struct ieee80211_channel **channels; u16 interval; /* interval between scans (in secs) */ 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; struct _dwell { u16 passive; u16 active; u16 fragmented; } dwell[IEEE80211_NUM_BANDS]; struct { u8 iterations; u8 full_scan_mul; /* not used for UMAC */ } schedule[2]; }; enum iwl_umac_scan_uid_type { IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0), IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1), IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN | IWL_UMAC_SCAN_UID_SCHED_SCAN, }; static int iwl_umac_scan_stop(struct iwl_mvm *mvm, enum iwl_umac_scan_uid_type type, bool notify); 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 __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band) { if (band == IEEE80211_BAND_2GHZ) return cpu_to_le32(PHY_BAND_24); else return cpu_to_le32(PHY_BAND_5); } static inline __le32 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band, bool no_cck) { u32 tx_ant; mvm->scan_last_antenna_idx = iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), mvm->scan_last_antenna_idx); tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; if (band == IEEE80211_BAND_2GHZ && !no_cck) return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | tx_ant); else return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); } /* * If req->n_ssids > 0, it means we should do an active scan. * In case of active scan w/o directed scan, we receive a zero-length SSID * just to notify that this scan is active and not passive. * In order to notify the FW of the number of SSIDs we wish to scan (including * the zero-length one), we need to set the corresponding bits in chan->type, * one for each SSID, and set the active bit (first). If the first SSID is * already included in the probe template, so we need to set only * req->n_ssids - 1 bits in addition to the first bit. */ static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm, enum ieee80211_band band, int n_ssids) { if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL) return 10; if (band == IEEE80211_BAND_2GHZ) return 20 + 3 * (n_ssids + 1); return 10 + 2 * (n_ssids + 1); } static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm, enum ieee80211_band band) { if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL) return 110; return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10; } static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); int *global_cnt = data; if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < MAX_PHYS) *global_cnt += 1; } static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mvm_scan_params *params) { int global_cnt = 0; enum ieee80211_band band; u8 frag_passive_dwell = 0; ieee80211_iterate_active_interfaces_atomic(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_scan_condition_iterator, &global_cnt); if (!global_cnt) goto not_bound; params->suspend_time = 30; params->max_out_time = 120; if (iwl_mvm_low_latency(mvm)) { if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_FRAGMENTED_SCAN) { params->suspend_time = 105; /* * If there is more than one active interface make * passive scan more fragmented. */ frag_passive_dwell = 40; params->max_out_time = frag_passive_dwell; } else { params->suspend_time = 120; params->max_out_time = 120; } } if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) { /* * P2P device scan should not be fragmented to avoid negative * impact on P2P device discovery. Configure max_out_time to be * equal to dwell time on passive channel. Take a longest * possible value, one that corresponds to 2GHz band */ if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { u32 passive_dwell = iwl_mvm_get_passive_dwell(mvm, IEEE80211_BAND_2GHZ); params->max_out_time = passive_dwell; } else { params->passive_fragmented = true; } } if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) && (params->max_out_time > 200)) params->max_out_time = 200; not_bound: for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) { if (params->passive_fragmented) params->dwell[band].fragmented = frag_passive_dwell; params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm, band); params->dwell[band].active = iwl_mvm_get_active_dwell(mvm, band, params->n_ssids); } IWL_DEBUG_SCAN(mvm, "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n", params->max_out_time, params->suspend_time, params->passive_fragmented); IWL_DEBUG_SCAN(mvm, "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n", params->dwell[IEEE80211_BAND_2GHZ].passive, params->dwell[IEEE80211_BAND_2GHZ].active, params->dwell[IEEE80211_BAND_2GHZ].fragmented); IWL_DEBUG_SCAN(mvm, "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n", params->dwell[IEEE80211_BAND_5GHZ].passive, params->dwell[IEEE80211_BAND_5GHZ].active, params->dwell[IEEE80211_BAND_5GHZ].fragmented); } static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) { /* require rrm scan whenever the fw supports it */ return mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT; } static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) { 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; } int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { 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); return 0; } int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); ieee80211_sched_scan_results(mvm->hw); return 0; } int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { 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); bool ebs_successful = (scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS); /* 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", ebs_successful ? "successful" : "failed"); 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", ebs_successful ? "successful" : "failed"); 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 (FW)\n", aborted ? "aborted" : "completed", ebs_successful ? "successful" : "failed"); mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; ieee80211_sched_scan_stopped(mvm->hw); } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", aborted ? "aborted" : "completed", ebs_successful ? "successful" : "failed"); mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; ieee80211_scan_completed(mvm->hw, scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); } mvm->last_ebs_successful = ebs_successful; return 0; } 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; /* * 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 */ *ssid_bitmap = 0; 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) { if (!params->ssids[j].ssid_len) continue; 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); *ssid_bitmap |= BIT(i); } else { *ssid_bitmap |= BIT(index); } } } 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 *profile_cfg; struct iwl_scan_offload_blacklist *blacklist; struct iwl_host_cmd cmd = { .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, .len[1] = sizeof(*profile_cfg), .dataflags[0] = IWL_HCMD_DFL_NOCOPY, .dataflags[1] = IWL_HCMD_DFL_NOCOPY, }; int blacklist_len; int i; int ret; if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) return -EIO; if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; else blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); if (!blacklist) return -ENOMEM; profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); if (!profile_cfg) { ret = -ENOMEM; goto free_blacklist; } cmd.data[0] = blacklist; cmd.len[0] = sizeof(*blacklist) * blacklist_len; cmd.data[1] = profile_cfg; /* No blacklist configuration */ profile_cfg->num_profiles = req->n_match_sets; profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; for (i = 0; i < req->n_match_sets; i++) { profile = &profile_cfg->profiles[i]; profile->ssid_index = i; /* Support any cipher and auth algorithm */ profile->unicast_cipher = 0xff; profile->auth_alg = 0xff; 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); free_blacklist: kfree(blacklist); 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); return false; } IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); return true; } static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm) { int ret; struct iwl_host_cmd cmd = { .id = SCAN_OFFLOAD_ABORT_CMD, }; u32 status; /* Exit instantly with error when device is not ready * to receive scan abort command or it does not perform * scheduled scan currently */ if (!mvm->scan_status) return -EIO; 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; } int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify) { int ret; struct iwl_notification_wait wait_scan_done; static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, }; bool sched = !!(mvm->scan_status & IWL_MVM_SCAN_SCHED); lockdep_assert_held(&mvm->mutex); if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN, notify); /* FIXME: For now we only check if no scan is set here, since * we only support LMAC in this flow and it doesn't support * multiple scans. */ if (!mvm->scan_status) return 0; if (iwl_mvm_is_radio_killed(mvm)) { ret = 0; goto out; } iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, scan_done_notif, ARRAY_SIZE(scan_done_notif), NULL, NULL); ret = iwl_mvm_send_scan_offload_abort(mvm); if (ret) { IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n", sched ? "offloaded " : "", ret); iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); goto out; } IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n", sched ? "scheduled " : ""); ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 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. Since the rx handler won't do anything now, we have * to release the scan reference here. */ if (mvm->scan_status == IWL_MVM_SCAN_REGULAR) iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); if (sched) { mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; mvm->scan_status |= IWL_MVM_SCAN_STOPPING_SCHED; if (notify) ieee80211_sched_scan_stopped(mvm->hw); } else { mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; mvm->scan_status |= IWL_MVM_SCAN_STOPPING_REGULAR; if (notify) ieee80211_scan_completed(mvm->hw, true); } 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, IEEE80211_BAND_2GHZ, no_cck); tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 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, IEEE80211_BAND_5GHZ, no_cck); tx_cmd[1].sta_id = mvm->aux_sta.sta_id; } 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; } 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[IEEE80211_BAND_2GHZ], ies->len[IEEE80211_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[IEEE80211_BAND_5GHZ], ies->len[IEEE80211_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[IEEE80211_BAND_5GHZ]); pos += ies->len[IEEE80211_BAND_5GHZ]; memcpy(pos, ies->common_ies, ies->common_ie_len); params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); } static void iwl_mvm_build_generic_scan_cmd(struct iwl_mvm *mvm, struct iwl_scan_req_lmac *cmd, struct iwl_mvm_scan_params *params) { memset(cmd, 0, ksize(cmd)); cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active; cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive; if (params->passive_fragmented) cmd->fragmented_dwell = params->dwell[IEEE80211_BAND_2GHZ].fragmented; cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); cmd->max_out_time = cpu_to_le32(params->max_out_time); cmd->suspend_time = cpu_to_le32(params->suspend_time); cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); cmd->iter_num = cpu_to_le32(1); if (iwl_mvm_rrm_scan_needed(mvm)) cmd->scan_flags |= cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); } 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, int n_iterations) { const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; /* 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. */ return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && mvm->last_ebs_successful && (n_iterations > 1 || (capa->api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS))); } 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 *preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels); u32 flags = 0, ssid_bitmap = 0; int n_iterations = params->schedule[0].iterations + params->schedule[1].iterations; lockdep_assert_held(&mvm->mutex); iwl_mvm_build_generic_scan_cmd(mvm, cmd, params); cmd->n_channels = (u8)params->n_channels; cmd->delay = cpu_to_le32(params->delay); if (params->pass_all) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; else flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; if (params->passive_fragmented) flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; if (params->n_ssids == 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; #ifdef CONFIG_IWLWIFI_DEBUGFS if (mvm->scan_iter_notif_enabled) flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; #endif cmd->scan_flags |= cpu_to_le32(flags); cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->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; cmd->schedule[0].delay = cpu_to_le16(params->interval); cmd->schedule[0].iterations = params->schedule[0].iterations; cmd->schedule[0].full_scan_mul = params->schedule[0].full_scan_mul; cmd->schedule[1].delay = cpu_to_le16(params->interval); cmd->schedule[1].iterations = params->schedule[1].iterations; cmd->schedule[1].full_scan_mul = params->schedule[1].iterations; if (iwl_mvm_scan_use_ebs(mvm, n_iterations)) { 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); *preq = params->preq; return 0; } int iwl_mvm_cancel_scan(struct iwl_mvm *mvm) { if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN, true); if (!(mvm->scan_status & IWL_MVM_SCAN_REGULAR)) return 0; if (iwl_mvm_is_radio_killed(mvm)) { ieee80211_scan_completed(mvm->hw, true); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; return 0; } return iwl_mvm_scan_offload_stop(mvm, true); } /* UMAC scan API */ struct iwl_umac_scan_done { struct iwl_mvm *mvm; enum iwl_umac_scan_uid_type type; }; 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[IEEE80211_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[IEEE80211_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); } int iwl_mvm_config_scan(struct iwl_mvm *mvm) { struct iwl_scan_config *scan_config; struct ieee80211_supported_band *band; int num_channels = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; int ret, i, j = 0, cmd_size, data_size; struct iwl_host_cmd cmd = { .id = SCAN_CFG_CMD, }; if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) return -ENOBUFS; cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; scan_config = kzalloc(cmd_size, GFP_KERNEL); if (!scan_config) return -ENOMEM; data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr); scan_config->hdr.size = cpu_to_le16(data_size); scan_config->flags = cpu_to_le32(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_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)); scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); scan_config->out_of_channel_time = cpu_to_le32(170); scan_config->suspend_time = cpu_to_le32(30); scan_config->dwell_active = 20; scan_config->dwell_passive = 110; scan_config->dwell_fragmented = 20; memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); scan_config->bcast_sta_id = mvm->aux_sta.sta_id; scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | IWL_CHANNEL_FLAG_ACCURATE_EBS | IWL_CHANNEL_FLAG_EBS_ADD | IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; for (i = 0; i < band->n_channels; i++, j++) scan_config->channel_array[j] = band->channels[i].hw_value; band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; for (i = 0; i < band->n_channels; i++, j++) scan_config->channel_array[j] = band->channels[i].hw_value; cmd.data[0] = scan_config; 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); kfree(scan_config); return ret; } static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid) { int i; for (i = 0; i < mvm->max_scans; i++) if (mvm->scan_uid[i] == uid) return i; return i; } static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm) { return iwl_mvm_find_scan_uid(mvm, 0); } static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm, enum iwl_umac_scan_uid_type type) { int i; for (i = 0; i < mvm->max_scans; i++) if (mvm->scan_uid[i] & type) return true; return false; } static int iwl_mvm_find_first_scan(struct iwl_mvm *mvm, enum iwl_umac_scan_uid_type type) { int i; for (i = 0; i < mvm->max_scans; i++) if (mvm->scan_uid[i] & type) return i; return i; } static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm, enum iwl_umac_scan_uid_type type) { u32 uid; /* make sure exactly one bit is on in scan type */ WARN_ON(hweight8(type) != 1); /* * Make sure scan uids are unique. If one scan lasts long time while * others are completing frequently, the seq number will wrap up and * we may have more than one scan with the same uid. */ do { uid = type | (mvm->scan_seq_num << IWL_UMAC_SCAN_UID_SEQ_OFFSET); mvm->scan_seq_num++; } while (iwl_mvm_find_scan_uid(mvm, uid) < mvm->max_scans); IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid); return uid; } static void iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm, struct iwl_scan_req_umac *cmd, struct iwl_mvm_scan_params *params) { memset(cmd, 0, ksize(cmd)); cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) - sizeof(struct iwl_mvm_umac_cmd_hdr)); cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active; cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive; if (params->passive_fragmented) cmd->fragmented_dwell = params->dwell[IEEE80211_BAND_2GHZ].fragmented; cmd->max_out_time = cpu_to_le32(params->max_out_time); cmd->suspend_time = cpu_to_le32(params->suspend_time); cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); } static void iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, struct ieee80211_channel **channels, int n_channels, u32 ssid_bitmap, struct iwl_scan_req_umac *cmd) { struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; int i; for (i = 0; i < n_channels; i++) { channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); channel_cfg[i].channel_num = channels[i]->hw_value; channel_cfg[i].iter_count = 1; channel_cfg[i].iter_interval = 0; } } static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids, struct cfg80211_ssid *ssids, int fragmented) { int flags = 0; if (n_ssids == 0) flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; if (n_ssids == 1 && ssids[0].ssid_len != 0) flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; if (fragmented) flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; if (iwl_mvm_rrm_scan_needed(mvm)) flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; return flags; } static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mvm_scan_params *params) { struct iwl_scan_req_umac *cmd = mvm->scan_cmd; struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + sizeof(struct iwl_scan_channel_cfg_umac) * mvm->fw->ucode_capa.n_scan_channels; u32 uid, flags; u32 ssid_bitmap = 0; int uid_idx; lockdep_assert_held(&mvm->mutex); uid_idx = iwl_mvm_find_free_scan_uid(mvm); if (uid_idx >= mvm->max_scans) return -EBUSY; iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, params); uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN); mvm->scan_uid[uid_idx] = uid; cmd->uid = cpu_to_le32(uid); cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); flags = iwl_mvm_scan_umac_common_flags(mvm, params->n_ssids, params->ssids, params->passive_fragmented); if (params->pass_all) flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; else flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; cmd->general_flags = cpu_to_le32(flags); if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS && mvm->last_ebs_successful) cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; cmd->n_channels = params->n_channels; iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, params->n_channels, ssid_bitmap, cmd); sec_part->schedule[0].iter_count = params->schedule[0].iterations; sec_part->delay = cpu_to_le16(params->delay); sec_part->preq = params->preq; return 0; } static int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mvm_scan_params *params) { struct iwl_scan_req_umac *cmd = mvm->scan_cmd; struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + sizeof(struct iwl_scan_channel_cfg_umac) * mvm->fw->ucode_capa.n_scan_channels; u32 uid, flags; u32 ssid_bitmap = 0; int uid_idx; lockdep_assert_held(&mvm->mutex); uid_idx = iwl_mvm_find_free_scan_uid(mvm); if (uid_idx >= mvm->max_scans) return -EBUSY; iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, params); cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN); mvm->scan_uid[uid_idx] = uid; cmd->uid = cpu_to_le32(uid); cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW); flags = iwl_mvm_scan_umac_common_flags(mvm, params->n_ssids, params->ssids, params->passive_fragmented); flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; if (params->pass_all) flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; else flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; cmd->general_flags = cpu_to_le32(flags); if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT && mvm->last_ebs_successful) cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; cmd->n_channels = params->n_channels; iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, params->n_channels, ssid_bitmap, cmd); sec_part->schedule[0].interval = cpu_to_le16(params->interval); /* With UMAC we use only one schedule, so take the final one only */ sec_part->schedule[0].iter_count = params->schedule[1].iterations; if (params->delay > U16_MAX) { IWL_DEBUG_SCAN(mvm, "delay value is > 16-bits, set to max possible\n"); sec_part->delay = cpu_to_le16(U16_MAX); } else { sec_part->delay = cpu_to_le16(params->delay); } sec_part->preq = params->preq; return 0; } 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) { /* 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. */ 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_offload_stop(mvm, true); case IWL_MVM_SCAN_SCHED: if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) return -EBUSY; return iwl_mvm_cancel_scan(mvm); case IWL_MVM_SCAN_NETDETECT: /* 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. */ return 0; default: WARN_ON(1); break; } return -EIO; } 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; 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; iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); /* 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.interval = 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.schedule[0].iterations = 1; params.schedule[0].full_scan_mul = 0; params.schedule[1].iterations = 0; params.schedule[1].full_scan_mul = 0; iwl_mvm_scan_calc_dwell(mvm, vif, ¶ms); iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { hcmd.id = SCAN_REQ_UMAC; ret = iwl_mvm_scan_umac(mvm, vif, ¶ms); } else { hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); } if (ret) return ret; ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); mvm->scan_status |= IWL_MVM_SCAN_REGULAR; } 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, "Scan failed! ret %d\n", ret); } if (ret) iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); return ret; } 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; 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; 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 = req->delay; 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; params.schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS; params.schedule[0].full_scan_mul = 1; params.schedule[1].iterations = 0xff; params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER; if (req->interval > U16_MAX) { IWL_DEBUG_SCAN(mvm, "interval value is > 16-bits, set to max possible\n"); params.interval = U16_MAX; } else { params.interval = req->interval / MSEC_PER_SEC; } iwl_mvm_scan_calc_dwell(mvm, vif, ¶ms); ret = iwl_mvm_config_sched_scan_profiles(mvm, req); if (ret) return ret; iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { hcmd.id = SCAN_REQ_UMAC; ret = iwl_mvm_sched_scan_umac(mvm, vif, ¶ms); } else { hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); } if (ret) return ret; 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); } return ret; } int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { 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 sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN); int uid_idx = iwl_mvm_find_scan_uid(mvm, uid); /* * Scan uid may be set to zero in case of scan abort request from above. */ if (uid_idx >= mvm->max_scans) return 0; IWL_DEBUG_SCAN(mvm, "Scan completed, uid %u type %s, status %s, EBS status %s\n", uid, sched ? "sched" : "regular", notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? "completed" : "aborted", notif->ebs_status == IWL_SCAN_EBS_SUCCESS ? "success" : "failed"); if (notif->ebs_status) mvm->last_ebs_successful = false; mvm->scan_uid[uid_idx] = 0; if (!sched) { ieee80211_scan_completed(mvm->hw, notif->status == IWL_SCAN_OFFLOAD_ABORTED); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) { ieee80211_sched_scan_stopped(mvm->hw); } else { IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n"); } return 0; } static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait, struct iwl_rx_packet *pkt, void *data) { struct iwl_umac_scan_done *scan_done = data; struct iwl_umac_scan_complete *notif = (void *)pkt->data; u32 uid = __le32_to_cpu(notif->uid); int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid); if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC)) return false; if (uid_idx >= scan_done->mvm->max_scans) return false; /* * Clear scan uid of scans that was aborted from above and completed * in FW so the RX handler does nothing. Set last_ebs_successful here if * needed. */ scan_done->mvm->scan_uid[uid_idx] = 0; if (notif->ebs_status) scan_done->mvm->last_ebs_successful = false; return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type); } static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid) { struct iwl_umac_scan_abort cmd = { .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) - sizeof(struct iwl_mvm_umac_cmd_hdr)), .uid = cpu_to_le32(uid), }; lockdep_assert_held(&mvm->mutex); IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd); } static int iwl_umac_scan_stop(struct iwl_mvm *mvm, enum iwl_umac_scan_uid_type type, bool notify) { struct iwl_notification_wait wait_scan_done; static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, }; struct iwl_umac_scan_done scan_done = { .mvm = mvm, .type = type, }; int i, ret = -EIO; iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, scan_done_notif, ARRAY_SIZE(scan_done_notif), iwl_scan_umac_done_check, &scan_done); IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); for (i = 0; i < mvm->max_scans; i++) { if (mvm->scan_uid[i] & type) { int err; if (iwl_mvm_is_radio_killed(mvm) && (type & IWL_UMAC_SCAN_UID_REG_SCAN)) { ieee80211_scan_completed(mvm->hw, true); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); break; } err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]); if (!err) ret = 0; } } if (ret) { IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n"); iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); return ret; } ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); if (ret) return ret; if (notify) { if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN) ieee80211_sched_scan_stopped(mvm->hw); if (type & IWL_UMAC_SCAN_UID_REG_SCAN) { ieee80211_scan_completed(mvm->hw, true); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); } } return ret; } int iwl_mvm_scan_size(struct iwl_mvm *mvm) { if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) return sizeof(struct iwl_scan_req_umac) + sizeof(struct iwl_scan_channel_cfg_umac) * mvm->fw->ucode_capa.n_scan_channels + sizeof(struct iwl_scan_req_umac_tail); 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); } /* * 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 (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { u32 uid, i; uid = iwl_mvm_find_first_scan(mvm, IWL_UMAC_SCAN_UID_REG_SCAN); if (uid < mvm->max_scans) { ieee80211_scan_completed(mvm->hw, true); mvm->scan_uid[uid] = 0; } uid = iwl_mvm_find_first_scan(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN); if (uid < mvm->max_scans && !mvm->restart_fw) { ieee80211_sched_scan_stopped(mvm->hw); mvm->scan_uid[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[i], "UMAC scan UID %d was not cleaned\n", mvm->scan_uid[i])) mvm->scan_uid[i] = 0; } } else { if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) ieee80211_scan_completed(mvm->hw, true); /* 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->restart_fw) ieee80211_sched_scan_stopped(mvm->hw); } }