| /****************************************************************************** |
| * |
| * 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. |
| * |
| * 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. |
| * 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 "iwl-eeprom-parse.h" |
| #include "fw-api-scan.h" |
| |
| #define IWL_PLCP_QUIET_THRESH 1 |
| #define IWL_ACTIVE_QUIET_TIME 10 |
| |
| 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]; |
| }; |
| |
| static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) |
| { |
| u16 rx_chain; |
| u8 rx_ant; |
| |
| if (mvm->scan_rx_ant != ANT_NONE) |
| rx_ant = mvm->scan_rx_ant; |
| else |
| rx_ant = mvm->fw->valid_rx_ant; |
| rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; |
| rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; |
| rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; |
| rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; |
| return cpu_to_le16(rx_chain); |
| } |
| |
| static inline __le32 |
| iwl_mvm_scan_rxon_flags(struct cfg80211_scan_request *req) |
| { |
| if (req->channels[0]->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_scan_cmd *cmd, |
| struct cfg80211_scan_request *req, |
| int first) |
| { |
| int fw_idx, req_idx; |
| |
| for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx >= first; |
| req_idx--, fw_idx++) { |
| cmd->direct_scan[fw_idx].id = WLAN_EID_SSID; |
| cmd->direct_scan[fw_idx].len = req->ssids[req_idx].ssid_len; |
| memcpy(cmd->direct_scan[fw_idx].ssid, |
| req->ssids[req_idx].ssid, |
| req->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(enum ieee80211_band band, int n_ssids) |
| { |
| if (band == IEEE80211_BAND_2GHZ) |
| return 30 + 3 * (n_ssids + 1); |
| return 20 + 2 * (n_ssids + 1); |
| } |
| |
| static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band) |
| { |
| 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 *ie, int 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 < ie_len)) |
| return len; |
| |
| if (ie && ie_len) { |
| memcpy(pos, ie, ie_len); |
| len += 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 (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, |
| struct iwl_mvm_scan_params *params) |
| { |
| bool global_bound = false; |
| enum ieee80211_band band; |
| |
| 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 = 100; |
| params->max_out_time = 600; |
| |
| if (iwl_mvm_low_latency(mvm)) { |
| params->suspend_time = 250; |
| params->max_out_time = 250; |
| } |
| |
| not_bound: |
| |
| for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) { |
| params->dwell[band].passive = iwl_mvm_get_passive_dwell(band); |
| params->dwell[band].active = iwl_mvm_get_active_dwell(band, |
| n_ssids); |
| } |
| } |
| |
| 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, }, |
| .flags = CMD_SYNC, |
| .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); |
| BUG_ON(mvm->scan_cmd == NULL); |
| |
| IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n"); |
| mvm->scan_status = IWL_MVM_SCAN_OS; |
| memset(cmd, 0, sizeof(struct iwl_scan_cmd) + |
| mvm->fw->ucode_capa.max_probe_length + |
| (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel))); |
| |
| 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, ¶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); |
| 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, req, basic_ssid ? 1 : 0); |
| |
| cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | |
| TX_CMD_FLG_BT_DIS); |
| 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, |
| 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_sched_scan_results(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_sched_scan_results *notif = (void *)pkt->data; |
| |
| if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) { |
| 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; |
| }; |
| } |
| |
| int iwl_mvm_cancel_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; |
| |
| 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; |
| } |
| |
| 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, CMD_SYNC, 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); |
| struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data; |
| |
| /* scan status must be locked for proper checking */ |
| lockdep_assert_held(&mvm->mutex); |
| |
| IWL_DEBUG_SCAN(mvm, "Scheduled scan completed, status %s\n", |
| scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? |
| "completed" : "aborted"); |
| |
| /* 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); |
| } |
| |
| return 0; |
| } |
| |
| static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sched_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->ie[band], ies->len[band], |
| 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 = |
| mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + |
| mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].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_scan_offload_cmd *scan, |
| 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; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) { |
| /* skip empty SSID matchsets */ |
| if (!req->match_sets[i].ssid.ssid_len) |
| continue; |
| scan->direct_scan[i].id = WLAN_EID_SSID; |
| scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len; |
| memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid, |
| scan->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, |
| scan->direct_scan); |
| if (index < 0) { |
| if (!req->ssids[j].ssid_len) |
| continue; |
| scan->direct_scan[i].id = WLAN_EID_SSID; |
| scan->direct_scan[i].len = req->ssids[j].ssid_len; |
| memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid, |
| scan->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, |
| struct iwl_scan_channel_cfg *channels, |
| enum ieee80211_band band, |
| int *head, int *tail, |
| u32 ssid_bitmap, |
| struct iwl_mvm_scan_params *params) |
| { |
| struct ieee80211_supported_band *s_band; |
| int n_channels = req->n_channels; |
| int i, j, index = 0; |
| bool partial; |
| |
| /* |
| * We have to configure all supported channels, even if we don't want to |
| * scan on them, but we have to send channels in the order that we want |
| * to scan. So add requested channels to head of the list and others to |
| * the end. |
| */ |
| s_band = &mvm->nvm_data->bands[band]; |
| |
| for (i = 0; i < s_band->n_channels && *head <= *tail; i++) { |
| partial = false; |
| for (j = 0; j < n_channels; j++) |
| if (s_band->channels[i].center_freq == |
| req->channels[j]->center_freq) { |
| index = *head; |
| (*head)++; |
| /* |
| * Channels that came with the request will be |
| * in partial scan . |
| */ |
| partial = true; |
| break; |
| } |
| if (!partial) { |
| index = *tail; |
| (*tail)--; |
| } |
| channels->channel_number[index] = |
| cpu_to_le16(ieee80211_frequency_to_channel( |
| s_band->channels[i].center_freq)); |
| channels->dwell_time[index][0] = params->dwell[band].active; |
| channels->dwell_time[index][1] = params->dwell[band].passive; |
| |
| channels->iter_count[index] = cpu_to_le16(1); |
| channels->iter_interval[index] = 0; |
| |
| if (!(s_band->channels[i].flags & IEEE80211_CHAN_NO_IR)) |
| channels->type[index] |= |
| cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE); |
| |
| channels->type[index] |= |
| cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL); |
| if (partial) |
| channels->type[index] |= |
| cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL); |
| |
| if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40) |
| channels->type[index] |= |
| cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW); |
| |
| /* scan for all SSIDs from req->ssids */ |
| channels->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_sched_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; |
| int tail = band_2ghz + band_5ghz - 1; |
| u32 ssid_bitmap; |
| int cmd_len; |
| int ret; |
| |
| struct iwl_scan_offload_cfg *scan_cfg; |
| struct iwl_host_cmd cmd = { |
| .id = SCAN_OFFLOAD_CONFIG_CMD, |
| .flags = CMD_SYNC, |
| }; |
| struct iwl_mvm_scan_params params = {}; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| cmd_len = sizeof(struct iwl_scan_offload_cfg) + |
| 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE; |
| |
| scan_cfg = kzalloc(cmd_len, GFP_KERNEL); |
| if (!scan_cfg) |
| return -ENOMEM; |
| |
| iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, ¶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, &ssid_bitmap); |
| /* 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], |
| scan_cfg->data); |
| iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, |
| IEEE80211_BAND_2GHZ, &head, &tail, |
| 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], |
| scan_cfg->data + |
| SCAN_OFFLOAD_PROBE_REQ_SIZE); |
| iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, |
| IEEE80211_BAND_5GHZ, &head, &tail, |
| 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, |
| .flags = CMD_SYNC, |
| .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; |
| } |
| |
| 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 = req->interval / 1000, |
| .schedule_line[0].full_scan_mul = 1, |
| |
| .schedule_line[1].iterations = 0xff, |
| .schedule_line[1].delay = req->interval / 1000, |
| .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER, |
| }; |
| |
| if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { |
| IWL_DEBUG_SCAN(mvm, |
| "Sending scheduled scan with filtering, filter len %d\n", |
| req->n_match_sets); |
| } else { |
| IWL_DEBUG_SCAN(mvm, |
| "Sending Scheduled scan without filtering\n"); |
| scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL); |
| } |
| |
| return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, CMD_SYNC, |
| sizeof(scan_req), &scan_req); |
| } |
| |
| static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm) |
| { |
| int ret; |
| struct iwl_host_cmd cmd = { |
| .id = SCAN_OFFLOAD_ABORT_CMD, |
| .flags = CMD_SYNC, |
| }; |
| 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) |
| 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_sched_scan_stop(struct iwl_mvm *mvm) |
| { |
| int ret; |
| struct iwl_notification_wait wait_scan_done; |
| static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, }; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (mvm->scan_status != IWL_MVM_SCAN_SCHED) { |
| IWL_DEBUG_SCAN(mvm, "No offloaded 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_sched_scan_abort(mvm); |
| if (ret) { |
| IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret); |
| iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); |
| return ret; |
| } |
| |
| IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n"); |
| |
| 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. |
| */ |
| mvm->scan_status = IWL_MVM_SCAN_NONE; |
| |
| return 0; |
| } |