| /****************************************************************************** |
| * |
| * 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 <ilw@linux.intel.com> |
| * 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 <linux/etherdevice.h> |
| #include <net/mac80211.h> |
| |
| #include "mvm.h" |
| #include "fw-api-scan.h" |
| |
| #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; |
| u16 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]; |
| }; |
| |
| 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 (fw_has_api(&mvm->fw->ucode_capa, 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 (fw_has_api(&mvm->fw->ucode_capa, 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 (fw_has_api(&mvm->fw->ucode_capa, |
| 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 && |
| fw_has_api(&mvm->fw->ucode_capa, |
| 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 fw_has_capa(&mvm->fw->ucode_capa, |
| IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); |
| } |
| |
| static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) |
| { |
| int max_probe_len; |
| |
| max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; |
| |
| /* we create the 802.11 header and SSID element */ |
| max_probe_len -= 24 + 2; |
| |
| /* DS parameter set element is added on 2.4GHZ band if required */ |
| if (iwl_mvm_rrm_scan_needed(mvm)) |
| max_probe_len -= 3; |
| |
| return max_probe_len; |
| } |
| |
| int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) |
| { |
| int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); |
| |
| /* TODO: [BUG] This function should return the maximum allowed size of |
| * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs |
| * in the same command. So the correct implementation of this function |
| * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan |
| * command has only 512 bytes and it would leave us with about 240 |
| * bytes for scan IEs, which is clearly not enough. So meanwhile |
| * we will report an incorrect value. This may result in a failure to |
| * issue a scan in unified_scan_lmac and unified_sched_scan_lmac |
| * functions with -ENOBUFS, if a large enough probe will be provided. |
| */ |
| return max_ie_len; |
| } |
| |
| static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res, |
| int num_res, u8 *buf, size_t buf_size) |
| { |
| int i; |
| u8 *pos = buf, *end = buf + buf_size; |
| |
| for (i = 0; pos < end && i < num_res; i++) |
| pos += snprintf(pos, end - pos, " %u", res[i].channel); |
| |
| /* terminate the string in case the buffer was too short */ |
| *(buf + buf_size - 1) = '\0'; |
| |
| return buf; |
| } |
| |
| void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; |
| u8 buf[256]; |
| |
| IWL_DEBUG_SCAN(mvm, |
| "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n", |
| notif->status, notif->scanned_channels, |
| iwl_mvm_dump_channel_list(notif->results, |
| notif->scanned_channels, buf, |
| sizeof(buf))); |
| } |
| |
| void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); |
| ieee80211_sched_scan_results(mvm->hw); |
| } |
| |
| static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) |
| { |
| switch (status) { |
| case IWL_SCAN_EBS_SUCCESS: |
| return "successful"; |
| case IWL_SCAN_EBS_INACTIVE: |
| return "inactive"; |
| case IWL_SCAN_EBS_FAILED: |
| case IWL_SCAN_EBS_CHAN_NOT_FOUND: |
| default: |
| return "failed"; |
| } |
| } |
| |
| void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; |
| bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); |
| |
| /* scan status must be locked for proper checking */ |
| lockdep_assert_held(&mvm->mutex); |
| |
| /* We first check if we were stopping a scan, in which case we |
| * just clear the stopping flag. Then we check if it was a |
| * firmware initiated stop, in which case we need to inform |
| * mac80211. |
| * Note that we can have a stopping and a running scan |
| * simultaneously, but we can't have two different types of |
| * scans stopping or running at the same time (since LMAC |
| * doesn't support it). |
| */ |
| |
| if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { |
| WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); |
| |
| IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", |
| aborted ? "aborted" : "completed", |
| iwl_mvm_ebs_status_str(scan_notif->ebs_status)); |
| |
| mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; |
| } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { |
| IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", |
| aborted ? "aborted" : "completed", |
| iwl_mvm_ebs_status_str(scan_notif->ebs_status)); |
| |
| mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; |
| } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { |
| WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); |
| |
| IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s (FW)\n", |
| aborted ? "aborted" : "completed", |
| iwl_mvm_ebs_status_str(scan_notif->ebs_status)); |
| |
| 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", |
| iwl_mvm_ebs_status_str(scan_notif->ebs_status)); |
| |
| 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 = |
| scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || |
| scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; |
| } |
| |
| static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) |
| { |
| int i; |
| |
| for (i = 0; i < PROBE_OPTION_MAX; i++) { |
| if (!ssid_list[i].len) |
| break; |
| if (ssid_list[i].len == ssid_len && |
| !memcmp(ssid_list->ssid, ssid, ssid_len)) |
| return i; |
| } |
| return -1; |
| } |
| |
| /* We insert the SSIDs in an inverted order, because the FW will |
| * invert it back. |
| */ |
| static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, |
| struct iwl_ssid_ie *ssids, |
| u32 *ssid_bitmap) |
| { |
| int i, j; |
| int index; |
| |
| /* |
| * 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) { |
| 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); |
| } |
| } |
| } |
| |
| static int |
| iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, |
| struct cfg80211_sched_scan_request *req) |
| { |
| struct iwl_scan_offload_profile *profile; |
| struct iwl_scan_offload_profile_cfg *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_lmac_scan_abort(struct iwl_mvm *mvm) |
| { |
| int ret; |
| struct iwl_host_cmd cmd = { |
| .id = SCAN_OFFLOAD_ABORT_CMD, |
| }; |
| u32 status; |
| |
| ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); |
| if (ret) |
| return ret; |
| |
| if (status != CAN_ABORT_STATUS) { |
| /* |
| * The scan abort will return 1 for success or |
| * 2 for "failure". A failure condition can be |
| * due to simply not being in an active scan which |
| * can occur if we send the scan abort before the |
| * microcode has notified us that a scan is completed. |
| */ |
| IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); |
| ret = -ENOENT; |
| } |
| |
| return ret; |
| } |
| |
| static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, |
| struct iwl_scan_req_tx_cmd *tx_cmd, |
| bool no_cck) |
| { |
| tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | |
| TX_CMD_FLG_BT_DIS); |
| tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, |
| 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 __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm, |
| enum iwl_scan_priority_ext prio) |
| { |
| if (fw_has_api(&mvm->fw->ucode_capa, |
| IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY)) |
| return cpu_to_le32(prio); |
| |
| if (prio <= IWL_SCAN_PRIORITY_EXT_2) |
| return cpu_to_le32(IWL_SCAN_PRIORITY_LOW); |
| |
| if (prio <= IWL_SCAN_PRIORITY_EXT_4) |
| return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM); |
| |
| return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); |
| } |
| |
| static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, |
| struct iwl_scan_req_lmac *cmd, |
| struct iwl_mvm_scan_params *params) |
| { |
| cmd->active_dwell = 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_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); |
| } |
| |
| static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, |
| struct ieee80211_scan_ies *ies, |
| int n_channels) |
| { |
| return ((n_ssids <= PROBE_OPTION_MAX) && |
| (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & |
| (ies->common_ie_len + |
| ies->len[NL80211_BAND_2GHZ] + |
| ies->len[NL80211_BAND_5GHZ] <= |
| iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); |
| } |
| |
| static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| 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; |
| * 4. it's not a p2p find operation. |
| */ |
| return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && |
| mvm->last_ebs_successful && |
| (n_iterations > 1 || |
| fw_has_api(capa, IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)) && |
| vif->type != NL80211_IFTYPE_P2P_DEVICE); |
| } |
| |
| static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params) |
| { |
| return params->schedule[0].iterations + params->schedule[1].iterations; |
| } |
| |
| static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, |
| struct iwl_mvm_scan_params *params) |
| { |
| int flags = 0; |
| |
| if (params->n_ssids == 0) |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; |
| |
| if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; |
| |
| if (params->passive_fragmented) |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; |
| |
| if (iwl_mvm_rrm_scan_needed(mvm)) |
| flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; |
| |
| if (params->pass_all) |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; |
| else |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; |
| |
| #ifdef CONFIG_IWLWIFI_DEBUGFS |
| if (mvm->scan_iter_notif_enabled) |
| flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; |
| #endif |
| |
| return flags; |
| } |
| |
| 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 ssid_bitmap = 0; |
| int n_iterations = iwl_mvm_scan_total_iterations(params); |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| memset(cmd, 0, ksize(cmd)); |
| |
| iwl_mvm_scan_lmac_dwell(mvm, cmd, params); |
| |
| cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); |
| cmd->iter_num = cpu_to_le32(1); |
| cmd->n_channels = (u8)params->n_channels; |
| |
| cmd->delay = cpu_to_le32(params->delay); |
| |
| cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params)); |
| |
| 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, vif, 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; |
| } |
| |
| 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_scan_uid_by_status(struct iwl_mvm *mvm, int status) |
| { |
| int i; |
| |
| for (i = 0; i < mvm->max_scans; i++) |
| if (mvm->scan_uid_status[i] == status) |
| return i; |
| |
| return -ENOENT; |
| } |
| |
| static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, |
| struct iwl_scan_req_umac *cmd, |
| struct iwl_mvm_scan_params *params) |
| { |
| 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 = |
| iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); |
| |
| if (iwl_mvm_scan_total_iterations(params) == 0) |
| cmd->ooc_priority = |
| iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); |
| else |
| cmd->ooc_priority = |
| iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2); |
| } |
| |
| 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_flags(struct iwl_mvm *mvm, |
| struct iwl_mvm_scan_params *params) |
| { |
| int flags = 0; |
| |
| if (params->n_ssids == 0) |
| flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; |
| |
| if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; |
| |
| if (params->passive_fragmented) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; |
| |
| if (iwl_mvm_rrm_scan_needed(mvm)) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; |
| |
| if (params->pass_all) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; |
| else |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; |
| |
| if (iwl_mvm_scan_total_iterations(params) > 1) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; |
| |
| #ifdef CONFIG_IWLWIFI_DEBUGFS |
| if (mvm->scan_iter_notif_enabled) |
| flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; |
| #endif |
| return flags; |
| } |
| |
| static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
| struct iwl_mvm_scan_params *params, |
| int type) |
| { |
| 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; |
| int uid; |
| u32 ssid_bitmap = 0; |
| int n_iterations = iwl_mvm_scan_total_iterations(params); |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| uid = iwl_mvm_scan_uid_by_status(mvm, 0); |
| if (uid < 0) |
| return uid; |
| |
| memset(cmd, 0, ksize(cmd)); |
| cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) - |
| sizeof(struct iwl_mvm_umac_cmd_hdr)); |
| |
| iwl_mvm_scan_umac_dwell(mvm, cmd, params); |
| |
| mvm->scan_uid_status[uid] = type; |
| |
| cmd->uid = cpu_to_le32(uid); |
| cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params)); |
| |
| if (iwl_mvm_scan_use_ebs(mvm, vif, n_iterations)) |
| 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); |
| |
| /* With UMAC we use only one schedule for now, so use the sum |
| * of the iterations (with a a maximum of 255). |
| */ |
| sec_part->schedule[0].iter_count = |
| (n_iterations > 255) ? 255 : n_iterations; |
| sec_part->schedule[0].interval = cpu_to_le16(params->interval); |
| |
| 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_stop(mvm, IWL_MVM_SCAN_SCHED, true); |
| case IWL_MVM_SCAN_SCHED: |
| if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) |
| return -EBUSY; |
| iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); |
| 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 (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { |
| hcmd.id = SCAN_REQ_UMAC; |
| ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, |
| IWL_MVM_SCAN_REGULAR); |
| } 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.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; |
| } |
| |
| /* In theory, LMAC scans can handle a 32-bit delay, but since |
| * waiting for over 18 hours to start the scan is a bit silly |
| * and to keep it aligned with UMAC scans (which only support |
| * 16-bit delays), trim it down to 16-bits. |
| */ |
| if (req->delay > U16_MAX) { |
| IWL_DEBUG_SCAN(mvm, |
| "delay value is > 16-bits, set to max possible\n"); |
| params.delay = U16_MAX; |
| } else { |
| params.delay = req->delay; |
| } |
| |
| 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 (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { |
| hcmd.id = SCAN_REQ_UMAC; |
| ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, IWL_MVM_SCAN_SCHED); |
| } 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; |
| } |
| |
| void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_umac_scan_complete *notif = (void *)pkt->data; |
| u32 uid = __le32_to_cpu(notif->uid); |
| bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); |
| |
| if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) |
| return; |
| |
| /* if the scan is already stopping, we don't need to notify mac80211 */ |
| if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { |
| ieee80211_scan_completed(mvm->hw, aborted); |
| iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); |
| } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { |
| ieee80211_sched_scan_stopped(mvm->hw); |
| } |
| |
| mvm->scan_status &= ~mvm->scan_uid_status[uid]; |
| |
| IWL_DEBUG_SCAN(mvm, |
| "Scan completed, uid %u type %u, status %s, EBS status %s\n", |
| uid, mvm->scan_uid_status[uid], |
| notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? |
| "completed" : "aborted", |
| iwl_mvm_ebs_status_str(notif->ebs_status)); |
| |
| if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && |
| notif->ebs_status != IWL_SCAN_EBS_INACTIVE) |
| mvm->last_ebs_successful = false; |
| |
| mvm->scan_uid_status[uid] = 0; |
| } |
| |
| void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; |
| u8 buf[256]; |
| |
| IWL_DEBUG_SCAN(mvm, |
| "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n", |
| notif->status, notif->scanned_channels, |
| iwl_mvm_dump_channel_list(notif->results, |
| notif->scanned_channels, buf, |
| sizeof(buf))); |
| } |
| |
| static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) |
| { |
| struct iwl_umac_scan_abort cmd = { |
| .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) - |
| sizeof(struct iwl_mvm_umac_cmd_hdr)), |
| }; |
| int uid, ret; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| /* We should always get a valid index here, because we already |
| * checked that this type of scan was running in the generic |
| * code. |
| */ |
| uid = iwl_mvm_scan_uid_by_status(mvm, type); |
| if (WARN_ON_ONCE(uid < 0)) |
| return uid; |
| |
| cmd.uid = cpu_to_le32(uid); |
| |
| IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); |
| |
| ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd); |
| if (!ret) |
| mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; |
| |
| return ret; |
| } |
| |
| static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) |
| { |
| struct iwl_notification_wait wait_scan_done; |
| static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, |
| SCAN_OFFLOAD_COMPLETE, }; |
| int ret; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, |
| scan_done_notif, |
| ARRAY_SIZE(scan_done_notif), |
| NULL, NULL); |
| |
| IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); |
| |
| if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) |
| ret = iwl_mvm_umac_scan_abort(mvm, type); |
| else |
| ret = iwl_mvm_lmac_scan_abort(mvm); |
| |
| if (ret) { |
| IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); |
| iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); |
| return ret; |
| } |
| |
| ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); |
| |
| return ret; |
| } |
| |
| int iwl_mvm_scan_size(struct iwl_mvm *mvm) |
| { |
| if (fw_has_capa(&mvm->fw->ucode_capa, 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 (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { |
| int uid, i; |
| |
| uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); |
| if (uid >= 0) { |
| ieee80211_scan_completed(mvm->hw, true); |
| mvm->scan_uid_status[uid] = 0; |
| } |
| uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); |
| if (uid >= 0 && !mvm->restart_fw) { |
| ieee80211_sched_scan_stopped(mvm->hw); |
| mvm->scan_uid_status[uid] = 0; |
| } |
| |
| /* We shouldn't have any UIDs still set. Loop over all the |
| * UIDs to make sure there's nothing left there and warn if |
| * any is found. |
| */ |
| for (i = 0; i < mvm->max_scans; i++) { |
| if (WARN_ONCE(mvm->scan_uid_status[i], |
| "UMAC scan UID %d status was not cleaned\n", |
| i)) |
| mvm->scan_uid_status[i] = 0; |
| } |
| } else { |
| if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) |
| 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); |
| } |
| } |
| |
| int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) |
| { |
| int ret; |
| |
| if (!(mvm->scan_status & type)) |
| return 0; |
| |
| if (iwl_mvm_is_radio_killed(mvm)) { |
| ret = 0; |
| goto out; |
| } |
| |
| ret = iwl_mvm_scan_stop_wait(mvm, type); |
| if (!ret) |
| mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; |
| out: |
| /* Clear the scan status so the next scan requests will |
| * succeed and mark the scan as stopping, so that the Rx |
| * handler doesn't do anything, as the scan was stopped from |
| * above. |
| */ |
| mvm->scan_status &= ~type; |
| |
| if (type == IWL_MVM_SCAN_REGULAR) { |
| /* Since the rx handler won't do anything now, we have |
| * to release the scan reference here. |
| */ |
| iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); |
| if (notify) |
| ieee80211_scan_completed(mvm->hw, true); |
| } else if (notify) { |
| ieee80211_sched_scan_stopped(mvm->hw); |
| } |
| |
| return ret; |
| } |