/****************************************************************************** * * 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 - 2014 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 - 2014 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; struct _dwell { u16 passive; u16 active; } dwell[IEEE80211_NUM_BANDS]; }; 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 mvm->fw->valid_rx_ant; } 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, mvm->fw->valid_tx_ant, 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); } /* * We insert the SSIDs in an inverted order, because the FW will * invert it back. The most prioritized SSID, which is first in the * request list, is not copied here, but inserted directly to the probe * request. */ static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid, struct cfg80211_ssid *ssids, int n_ssids, int first) { int fw_idx, req_idx; for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first; req_idx--, fw_idx++) { cmd_ssid[fw_idx].id = WLAN_EID_SSID; cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len; memcpy(cmd_ssid[fw_idx].ssid, ssids[req_idx].ssid, ssids[req_idx].ssid_len); } } /* * 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_fill_channels(struct iwl_scan_cmd *cmd, struct cfg80211_scan_request *req, bool basic_ssid, struct iwl_mvm_scan_params *params) { struct iwl_scan_channel *chan = (struct iwl_scan_channel *) (cmd->data + le16_to_cpu(cmd->tx_cmd.len)); int i; int type = BIT(req->n_ssids) - 1; enum ieee80211_band band = req->channels[0]->band; if (!basic_ssid) type |= BIT(req->n_ssids); for (i = 0; i < cmd->channel_count; i++) { chan->channel = cpu_to_le16(req->channels[i]->hw_value); chan->type = cpu_to_le32(type); if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR) chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE); chan->active_dwell = cpu_to_le16(params->dwell[band].active); chan->passive_dwell = cpu_to_le16(params->dwell[band].passive); chan->iteration_count = cpu_to_le16(1); chan++; } } /* * Fill in probe request with the following parameters: * TA is our vif HW address, which mac80211 ensures we have. * Packet is broadcasted, so this is both SA and DA. * The probe request IE is made out of two: first comes the most prioritized * SSID if a directed scan is requested. Second comes whatever extra * information was given to us as the scan request IE. */ static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta, int n_ssids, const u8 *ssid, int ssid_len, const u8 *band_ie, int band_ie_len, const u8 *common_ie, int common_ie_len, int left) { int len = 0; u8 *pos = NULL; /* Make sure there is enough space for the probe request, * two mandatory IEs and the data */ left -= 24; if (left < 0) return 0; frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); eth_broadcast_addr(frame->da); memcpy(frame->sa, ta, ETH_ALEN); eth_broadcast_addr(frame->bssid); frame->seq_ctrl = 0; len += 24; /* for passive scans, no need to fill anything */ if (n_ssids == 0) return (u16)len; /* points to the payload of the request */ pos = &frame->u.probe_req.variable[0]; /* fill in our SSID IE */ left -= ssid_len + 2; if (left < 0) return 0; *pos++ = WLAN_EID_SSID; *pos++ = ssid_len; if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */ memcpy(pos, ssid, ssid_len); pos += ssid_len; } len += ssid_len + 2; if (WARN_ON(left < band_ie_len + common_ie_len)) return len; if (band_ie && band_ie_len) { memcpy(pos, band_ie, band_ie_len); pos += band_ie_len; len += band_ie_len; } if (common_ie && common_ie_len) { memcpy(pos, common_ie, common_ie_len); pos += common_ie_len; len += common_ie_len; } return (u16)len; } 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); bool *global_bound = data; if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < MAX_PHYS) *global_bound = true; } static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm, struct ieee80211_vif *vif, int n_ssids, u32 flags, struct iwl_mvm_scan_params *params) { bool global_bound = false; 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_bound); if (!global_bound) goto not_bound; params->suspend_time = 30; params->max_out_time = 170; if (iwl_mvm_low_latency(mvm)) { if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_FRAGMENTED_SCAN) { params->suspend_time = 105; params->max_out_time = 70; frag_passive_dwell = 20; } 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 (flags & NL80211_SCAN_FLAG_LOW_PRIORITY) params->max_out_time = 200; not_bound: for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) { if (params->passive_fragmented) params->dwell[band].passive = frag_passive_dwell; else params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm, band); params->dwell[band].active = iwl_mvm_get_active_dwell(mvm, band, n_ssids); } } static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) { /* require rrm scan whenever the fw supports it */ return mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT; } static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm, bool is_sched_scan) { int max_probe_len; if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; else max_probe_len = mvm->fw->ucode_capa.max_probe_length; /* we create the 802.11 header and SSID element */ max_probe_len -= 24 + 2; /* basic ssid is added only for hw_scan with and old api */ if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) && !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) && !is_sched_scan) max_probe_len -= 32; /* 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, bool is_sched_scan) { int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan); if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) return max_ie_len; /* TODO: [BUG] This function should return the maximum allowed size of * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs * in the same command. So the correct implementation of this function * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan * command has only 512 bytes and it would leave us with about 240 * bytes for scan IEs, which is clearly not enough. So meanwhile * we will report an incorrect value. This may result in a failure to * issue a scan in unified_scan_lmac and unified_sched_scan_lmac * functions with -ENOBUFS, if a large enough probe will be provided. */ return max_ie_len; } int iwl_mvm_scan_request(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_scan_request *req) { struct iwl_host_cmd hcmd = { .id = SCAN_REQUEST_CMD, .len = { 0, }, .data = { mvm->scan_cmd, }, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; struct iwl_scan_cmd *cmd = mvm->scan_cmd; int ret; u32 status; int ssid_len = 0; u8 *ssid = NULL; bool basic_ssid = !(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID); struct iwl_mvm_scan_params params = {}; lockdep_assert_held(&mvm->mutex); /* we should have failed registration if scan_cmd was NULL */ if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n"); mvm->scan_status = IWL_MVM_SCAN_OS; memset(cmd, 0, ksize(cmd)); cmd->channel_count = (u8)req->n_channels; cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm); iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, ¶ms); cmd->max_out_time = cpu_to_le32(params.max_out_time); cmd->suspend_time = cpu_to_le32(params.suspend_time); if (params.passive_fragmented) cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN; cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | MAC_FILTER_IN_BEACON); if (vif->type == NL80211_IFTYPE_P2P_DEVICE) cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED); else cmd->type = cpu_to_le32(SCAN_TYPE_FORCED); cmd->repeats = cpu_to_le32(1); /* * If the user asked for passive scan, don't change to active scan if * you see any activity on the channel - remain passive. */ if (req->n_ssids > 0) { cmd->passive2active = cpu_to_le16(1); cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE; if (basic_ssid) { ssid = req->ssids[0].ssid; ssid_len = req->ssids[0].ssid_len; } } else { cmd->passive2active = 0; cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE; } iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids, basic_ssid ? 1 : 0); cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 3 << TX_CMD_FLG_BT_PRIO_POS); cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id; cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); cmd->tx_cmd.rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band, req->no_cck); cmd->tx_cmd.len = cpu_to_le16(iwl_mvm_fill_probe_req( (struct ieee80211_mgmt *)cmd->data, vif->addr, req->n_ssids, ssid, ssid_len, req->ie, req->ie_len, NULL, 0, mvm->fw->ucode_capa.max_probe_length)); iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, ¶ms); cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) + le16_to_cpu(cmd->tx_cmd.len) + (cmd->channel_count * sizeof(struct iwl_scan_channel))); hcmd.len[0] = le16_to_cpu(cmd->len); status = SCAN_RESPONSE_OK; ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status); if (!ret && status == SCAN_RESPONSE_OK) { IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); } 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! status 0x%x ret %d\n", status, ret); mvm->scan_status = IWL_MVM_SCAN_NONE; ret = -EIO; } return ret; } int iwl_mvm_rx_scan_response(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_cmd_response *resp = (void *)pkt->data; IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n", le32_to_cpu(resp->status)); return 0; } int iwl_mvm_rx_scan_complete(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_scan_complete_notif *notif = (void *)pkt->data; lockdep_assert_held(&mvm->mutex); IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n", notif->status, notif->scanned_channels); if (mvm->scan_status == IWL_MVM_SCAN_OS) mvm->scan_status = IWL_MVM_SCAN_NONE; ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); return 0; } int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) && !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) { struct iwl_sched_scan_results *notif = (void *)pkt->data; if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN)) return 0; } IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); ieee80211_sched_scan_results(mvm->hw); return 0; } static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait, struct iwl_rx_packet *pkt, void *data) { struct iwl_mvm *mvm = container_of(notif_wait, struct iwl_mvm, notif_wait); struct iwl_scan_complete_notif *notif; u32 *resp; switch (pkt->hdr.cmd) { case SCAN_ABORT_CMD: resp = (void *)pkt->data; if (*resp == CAN_ABORT_STATUS) { IWL_DEBUG_SCAN(mvm, "Scan can be aborted, wait until completion\n"); return false; } /* * If scan cannot be aborted, it means that we had a * SCAN_COMPLETE_NOTIFICATION in the pipe and it called * ieee80211_scan_completed already. */ IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n", *resp); return true; case SCAN_COMPLETE_NOTIFICATION: notif = (void *)pkt->data; IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n", notif->status); return true; default: WARN_ON(1); return false; }; } static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm) { struct iwl_notification_wait wait_scan_abort; static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD, SCAN_COMPLETE_NOTIFICATION }; int ret; iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort, scan_abort_notif, ARRAY_SIZE(scan_abort_notif), iwl_mvm_scan_abort_notif, NULL); ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL); if (ret) { IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret); /* mac80211's state will be cleaned in the nic_restart flow */ goto out_remove_notif; } return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ); out_remove_notif: iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort); return ret; } 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); u8 status, ebs_status; if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) { struct iwl_periodic_scan_complete *scan_notif; scan_notif = (void *)pkt->data; status = scan_notif->status; ebs_status = scan_notif->ebs_status; } else { struct iwl_scan_offload_complete *scan_notif; scan_notif = (void *)pkt->data; status = scan_notif->status; ebs_status = scan_notif->ebs_status; } /* scan status must be locked for proper checking */ lockdep_assert_held(&mvm->mutex); IWL_DEBUG_SCAN(mvm, "%s completed, status %s, EBS status %s\n", mvm->scan_status == IWL_MVM_SCAN_SCHED ? "Scheduled scan" : "Scan", status == IWL_SCAN_OFFLOAD_COMPLETED ? "completed" : "aborted", ebs_status == IWL_SCAN_EBS_SUCCESS ? "success" : "failed"); /* only call mac80211 completion if the stop was initiated by FW */ if (mvm->scan_status == IWL_MVM_SCAN_SCHED) { mvm->scan_status = IWL_MVM_SCAN_NONE; ieee80211_sched_scan_stopped(mvm->hw); } else if (mvm->scan_status == IWL_MVM_SCAN_OS) { mvm->scan_status = IWL_MVM_SCAN_NONE; ieee80211_scan_completed(mvm->hw, status == IWL_SCAN_OFFLOAD_ABORTED); iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); } mvm->last_ebs_successful = !ebs_status; return 0; } static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_ies *ies, enum ieee80211_band band, struct iwl_tx_cmd *cmd, u8 *data) { u16 cmd_len; cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL); cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); cmd->sta_id = mvm->aux_sta.sta_id; cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false); cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data, vif->addr, 1, NULL, 0, ies->ies[band], ies->len[band], ies->common_ies, ies->common_ie_len, SCAN_OFFLOAD_PROBE_REQ_SIZE); cmd->len = cpu_to_le16(cmd_len); } static void iwl_build_scan_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct iwl_scan_offload_cmd *scan, struct iwl_mvm_scan_params *params) { scan->channel_count = req->n_channels; scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT; scan->rx_chain = iwl_mvm_scan_rx_chain(mvm); scan->max_out_time = cpu_to_le32(params->max_out_time); scan->suspend_time = cpu_to_le32(params->suspend_time); scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP | MAC_FILTER_IN_BEACON); scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND); scan->rep_count = cpu_to_le32(1); if (params->passive_fragmented) scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN; } 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; } static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req, struct iwl_ssid_ie *direct_scan, u32 *ssid_bitmap, bool basic_ssid) { 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; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) { /* skip empty SSID matchsets */ if (!req->match_sets[i].ssid.ssid_len) continue; direct_scan[i].id = WLAN_EID_SSID; direct_scan[i].len = req->match_sets[i].ssid.ssid_len; memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid, direct_scan[i].len); } /* add SSIDs from scan SSID list */ *ssid_bitmap = 0; for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) { index = iwl_ssid_exist(req->ssids[j].ssid, req->ssids[j].ssid_len, direct_scan); if (index < 0) { if (!req->ssids[j].ssid_len && basic_ssid) continue; direct_scan[i].id = WLAN_EID_SSID; direct_scan[i].len = req->ssids[j].ssid_len; memcpy(direct_scan[i].ssid, req->ssids[j].ssid, direct_scan[i].len); *ssid_bitmap |= BIT(i + 1); i++; } else { *ssid_bitmap |= BIT(index + 1); } } } static void iwl_build_channel_cfg(struct iwl_mvm *mvm, struct cfg80211_sched_scan_request *req, u8 *channels_buffer, enum ieee80211_band band, int *head, u32 ssid_bitmap, struct iwl_mvm_scan_params *params) { u32 n_channels = mvm->fw->ucode_capa.n_scan_channels; __le32 *type = (__le32 *)channels_buffer; __le16 *channel_number = (__le16 *)(type + n_channels); __le16 *iter_count = channel_number + n_channels; __le32 *iter_interval = (__le32 *)(iter_count + n_channels); u8 *active_dwell = (u8 *)(iter_interval + n_channels); u8 *passive_dwell = active_dwell + n_channels; int i, index = 0; for (i = 0; i < req->n_channels; i++) { struct ieee80211_channel *chan = req->channels[i]; if (chan->band != band) continue; index = *head; (*head)++; channel_number[index] = cpu_to_le16(chan->hw_value); active_dwell[index] = params->dwell[band].active; passive_dwell[index] = params->dwell[band].passive; iter_count[index] = cpu_to_le16(1); iter_interval[index] = 0; if (!(chan->flags & IEEE80211_CHAN_NO_IR)) type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE); type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL | IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL); if (chan->flags & IEEE80211_CHAN_NO_HT40) type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW); /* scan for all SSIDs from req->ssids */ type[index] |= cpu_to_le32(ssid_bitmap); } } int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct ieee80211_scan_ies *ies) { int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels; int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; int head = 0; u32 ssid_bitmap; int cmd_len; int ret; u8 *probes; bool basic_ssid = !(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID); struct iwl_scan_offload_cfg *scan_cfg; struct iwl_host_cmd cmd = { .id = SCAN_OFFLOAD_CONFIG_CMD, }; struct iwl_mvm_scan_params params = {}; lockdep_assert_held(&mvm->mutex); cmd_len = sizeof(struct iwl_scan_offload_cfg) + mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE + 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE; scan_cfg = kzalloc(cmd_len, GFP_KERNEL); if (!scan_cfg) return -ENOMEM; probes = scan_cfg->data + mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms); iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, ¶ms); scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len); iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan, &ssid_bitmap, basic_ssid); /* build tx frames for supported bands */ if (band_2ghz) { iwl_scan_offload_build_tx_cmd(mvm, vif, ies, IEEE80211_BAND_2GHZ, &scan_cfg->scan_cmd.tx_cmd[0], probes); iwl_build_channel_cfg(mvm, req, scan_cfg->data, IEEE80211_BAND_2GHZ, &head, ssid_bitmap, ¶ms); } if (band_5ghz) { iwl_scan_offload_build_tx_cmd(mvm, vif, ies, IEEE80211_BAND_5GHZ, &scan_cfg->scan_cmd.tx_cmd[1], probes + SCAN_OFFLOAD_PROBE_REQ_SIZE); iwl_build_channel_cfg(mvm, req, scan_cfg->data, IEEE80211_BAND_5GHZ, &head, ssid_bitmap, ¶ms); } cmd.data[0] = scan_cfg; cmd.len[0] = cmd_len; cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n"); ret = iwl_mvm_send_cmd(mvm, &cmd); kfree(scan_cfg); return ret; } 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; } int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, struct cfg80211_sched_scan_request *req) { struct iwl_scan_offload_req scan_req = { .watchdog = IWL_SCHED_SCAN_WATCHDOG, .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS, .schedule_line[0].delay = cpu_to_le16(req->interval / 1000), .schedule_line[0].full_scan_mul = 1, .schedule_line[1].iterations = 0xff, .schedule_line[1].delay = cpu_to_le16(req->interval / 1000), .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER, }; if (iwl_mvm_scan_pass_all(mvm, req)) scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL); if (mvm->last_ebs_successful && mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE); return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0, sizeof(scan_req), &scan_req); } int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct ieee80211_scan_ies *ies) { int ret; if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) { ret = iwl_mvm_config_sched_scan_profiles(mvm, req); if (ret) return ret; ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies); } else if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) { mvm->scan_status = IWL_MVM_SCAN_SCHED; ret = iwl_mvm_config_sched_scan_profiles(mvm, req); if (ret) return ret; ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies); } else { mvm->scan_status = IWL_MVM_SCAN_SCHED; ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies); if (ret) return ret; ret = iwl_mvm_config_sched_scan_profiles(mvm, req); if (ret) return ret; ret = iwl_mvm_sched_scan_start(mvm, req); } return ret; } 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 != IWL_MVM_SCAN_SCHED && (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) || mvm->scan_status != IWL_MVM_SCAN_OS)) 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); if (mvm->scan_status == IWL_MVM_SCAN_NONE) return 0; if (iwl_mvm_is_radio_killed(mvm)) goto out; if (mvm->scan_status != IWL_MVM_SCAN_SCHED && (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) || mvm->scan_status != IWL_MVM_SCAN_OS)) { IWL_DEBUG_SCAN(mvm, "No scan to stop\n"); return 0; } 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); return ret; } IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n", sched ? "offloaded " : ""); ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); if (ret) return ret; /* * Clear the scan status so the next scan requests will succeed. This * also ensures 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_OS) iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); out: mvm->scan_status = IWL_MVM_SCAN_NONE; if (notify) { if (sched) ieee80211_sched_scan_stopped(mvm->hw); else ieee80211_scan_completed(mvm->hw, true); } return 0; } static void iwl_mvm_unified_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_unified_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_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_ies *ies, struct iwl_scan_probe_req *preq, const u8 *mac_addr, const u8 *mac_addr_mask) { struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf; u8 *pos, *newpos; /* * 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, 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; preq->mac_header.offset = 0; 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); preq->band_data[0].offset = cpu_to_le16(pos - preq->buf); preq->band_data[0].len = cpu_to_le16(newpos - pos); pos = newpos; memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ], ies->len[IEEE80211_BAND_5GHZ]); preq->band_data[1].offset = cpu_to_le16(pos - preq->buf); 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); preq->common_data.offset = cpu_to_le16(pos - preq->buf); preq->common_data.len = cpu_to_le16(ies->common_ie_len); } static void iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm, struct iwl_scan_req_unified_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].passive; 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); } int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_request *req) { struct iwl_host_cmd hcmd = { .id = SCAN_OFFLOAD_REQUEST_CMD, .len = { sizeof(struct iwl_scan_req_unified_lmac) + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels + sizeof(struct iwl_scan_probe_req), }, .data = { mvm->scan_cmd, }, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd; struct iwl_scan_probe_req *preq; struct iwl_mvm_scan_params params = {}; u32 flags; u32 ssid_bitmap = 0; int ret, i; lockdep_assert_held(&mvm->mutex); /* we should have failed registration if scan_cmd was NULL */ if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; if (req->req.n_ssids > PROBE_OPTION_MAX || req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] + req->ies.len[NL80211_BAND_5GHZ] > iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) || req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels) return -ENOBUFS; mvm->scan_status = IWL_MVM_SCAN_OS; iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags, ¶ms); iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, ¶ms); cmd->n_channels = (u8)req->req.n_channels; flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; if (req->req.n_ssids == 1 && req->req.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 (req->req.n_ssids == 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; cmd->scan_flags |= cpu_to_le32(flags); cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | MAC_FILTER_IN_BEACON); iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck); iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids, req->req.n_ssids, 0); cmd->schedule[0].delay = 0; cmd->schedule[0].iterations = 1; cmd->schedule[0].full_scan_mul = 0; cmd->schedule[1].delay = 0; cmd->schedule[1].iterations = 0; cmd->schedule[1].full_scan_mul = 0; if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS && mvm->last_ebs_successful) { 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); } for (i = 1; i <= req->req.n_ssids; i++) ssid_bitmap |= BIT(i); iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels, req->req.n_channels, ssid_bitmap, cmd); preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels); iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq, req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? req->req.mac_addr : NULL, req->req.mac_addr_mask); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); } 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); mvm->scan_status = IWL_MVM_SCAN_NONE; ret = -EIO; } return ret; } int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct ieee80211_scan_ies *ies) { struct iwl_host_cmd hcmd = { .id = SCAN_OFFLOAD_REQUEST_CMD, .len = { sizeof(struct iwl_scan_req_unified_lmac) + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels + sizeof(struct iwl_scan_probe_req), }, .data = { mvm->scan_cmd, }, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd; struct iwl_scan_probe_req *preq; struct iwl_mvm_scan_params params = {}; int ret; u32 flags = 0, ssid_bitmap = 0; lockdep_assert_held(&mvm->mutex); /* we should have failed registration if scan_cmd was NULL */ if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; if (req->n_ssids > PROBE_OPTION_MAX || ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + ies->len[NL80211_BAND_5GHZ] > iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) || req->n_channels > mvm->fw->ucode_capa.n_scan_channels) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms); iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, ¶ms); cmd->n_channels = (u8)req->n_channels; if (iwl_mvm_scan_pass_all(mvm, req)) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; else flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; if (req->n_ssids == 1 && req->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 (req->n_ssids == 0) flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; cmd->scan_flags |= cpu_to_le32(flags); cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | MAC_FILTER_IN_BEACON); iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false); iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false); cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC); cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS; cmd->schedule[0].full_scan_mul = 1; cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC); cmd->schedule[1].iterations = 0xff; cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER; if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT && mvm->last_ebs_successful) { 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, req->channels, req->n_channels, ssid_bitmap, cmd); preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels); iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq, req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? req->mac_addr : NULL, req->mac_addr_mask); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { IWL_DEBUG_SCAN(mvm, "Sched scan request was sent successfully\n"); } 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_status = IWL_MVM_SCAN_NONE; ret = -EIO; } return ret; } 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_NONE) 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_NONE; return 0; } if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) return iwl_mvm_scan_offload_stop(mvm, true); return iwl_mvm_cancel_regular_scan(mvm); } /* 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(mvm->fw->valid_tx_ant); 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].center_freq; 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].center_freq; 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 < IWL_MVM_MAX_SIMULTANEOUS_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 < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) if (mvm->scan_uid[i] & type) return true; return false; } 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) < IWL_MVM_MAX_SIMULTANEOUS_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].passive; 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; } int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_request *req) { struct iwl_host_cmd hcmd = { .id = SCAN_REQ_UMAC, .len = { iwl_mvm_scan_size(mvm), }, .data = { mvm->scan_cmd, }, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; 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; struct iwl_mvm_scan_params params = {}; u32 uid, flags; u32 ssid_bitmap = 0; int ret, i, uid_idx; lockdep_assert_held(&mvm->mutex); uid_idx = iwl_mvm_find_free_scan_uid(mvm); if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) return -EBUSY; /* we should have failed registration if scan_cmd was NULL */ if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX || req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] + req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 > SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags, ¶ms); iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms); 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, req->req.n_ssids, req->req.ssids, params.passive_fragmented); flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; cmd->general_flags = cpu_to_le32(flags); cmd->n_channels = req->req.n_channels; for (i = 0; i < req->req.n_ssids; i++) ssid_bitmap |= BIT(i); iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels, req->req.n_channels, ssid_bitmap, cmd); sec_part->schedule[0].iter_count = 1; sec_part->delay = 0; iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq, req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? req->req.mac_addr : NULL, req->req.mac_addr_mask); iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids, req->req.n_ssids, 0); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); } 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); } return ret; } int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct ieee80211_scan_ies *ies) { struct iwl_host_cmd hcmd = { .id = SCAN_REQ_UMAC, .len = { iwl_mvm_scan_size(mvm), }, .data = { mvm->scan_cmd, }, .dataflags = { IWL_HCMD_DFL_NOCOPY, }, }; 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; struct iwl_mvm_scan_params params = {}; u32 uid, flags; u32 ssid_bitmap = 0; int ret, uid_idx; lockdep_assert_held(&mvm->mutex); uid_idx = iwl_mvm_find_free_scan_uid(mvm); if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) return -EBUSY; /* we should have failed registration if scan_cmd was NULL */ if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX || ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + ies->len[NL80211_BAND_5GHZ] + 24 + 2 > SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels > mvm->fw->ucode_capa.n_scan_channels)) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, ¶ms); iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms); 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, req->n_ssids, req->ssids, params.passive_fragmented); flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; if (iwl_mvm_scan_pass_all(mvm, req)) 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 = req->n_channels; iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap, false); /* This API uses bits 0-19 instead of 1-20. */ ssid_bitmap = ssid_bitmap >> 1; iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels, ssid_bitmap, cmd); sec_part->schedule[0].interval = cpu_to_le16(req->interval / MSEC_PER_SEC); sec_part->schedule[0].iter_count = 0xff; sec_part->delay = 0; iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq, req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? req->mac_addr : NULL, req->mac_addr_mask); ret = iwl_mvm_send_cmd(mvm, &hcmd); if (!ret) { IWL_DEBUG_SCAN(mvm, "Sched scan request was sent successfully\n"); } 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 >= IWL_MVM_MAX_SIMULTANEOUS_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"); mvm->last_ebs_successful = !notif->ebs_status; 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 >= IWL_MVM_MAX_SIMULTANEOUS_SCANS) return false; /* * Clear scan uid of scans that was aborted from above and completed * in FW so the RX handler does nothing. */ scan_done->mvm->scan_uid[uid_idx] = 0; 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 < IWL_MVM_MAX_SIMULTANEOUS_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); if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) return sizeof(struct iwl_scan_req_unified_lmac) + sizeof(struct iwl_scan_channel_cfg_lmac) * mvm->fw->ucode_capa.n_scan_channels + sizeof(struct iwl_scan_probe_req); return sizeof(struct iwl_scan_cmd) + mvm->fw->ucode_capa.max_probe_length + mvm->fw->ucode_capa.n_scan_channels * sizeof(struct iwl_scan_channel); }