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path: root/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
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Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/scan.c')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/scan.c1585
1 files changed, 1585 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
new file mode 100644
index 000000000000..9a15642f80dd
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -0,0 +1,1585 @@
+/******************************************************************************
+ *
+ * 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 <linuxwifi@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
+
+enum iwl_mvm_traffic_load {
+ IWL_MVM_TRAFFIC_LOW,
+ IWL_MVM_TRAFFIC_MEDIUM,
+ IWL_MVM_TRAFFIC_HIGH,
+};
+
+struct iwl_mvm_scan_timing_params {
+ u32 dwell_active;
+ u32 dwell_passive;
+ u32 dwell_fragmented;
+ u32 dwell_extended;
+ u32 suspend_time;
+ u32 max_out_time;
+};
+
+static struct iwl_mvm_scan_timing_params scan_timing[] = {
+ [IWL_SCAN_TYPE_UNASSOC] = {
+ .dwell_active = 10,
+ .dwell_passive = 110,
+ .dwell_fragmented = 44,
+ .dwell_extended = 90,
+ .suspend_time = 0,
+ .max_out_time = 0,
+ },
+ [IWL_SCAN_TYPE_WILD] = {
+ .dwell_active = 10,
+ .dwell_passive = 110,
+ .dwell_fragmented = 44,
+ .dwell_extended = 90,
+ .suspend_time = 30,
+ .max_out_time = 120,
+ },
+ [IWL_SCAN_TYPE_MILD] = {
+ .dwell_active = 10,
+ .dwell_passive = 110,
+ .dwell_fragmented = 44,
+ .dwell_extended = 90,
+ .suspend_time = 120,
+ .max_out_time = 120,
+ },
+ [IWL_SCAN_TYPE_FRAGMENTED] = {
+ .dwell_active = 10,
+ .dwell_passive = 110,
+ .dwell_fragmented = 44,
+ .suspend_time = 95,
+ .max_out_time = 44,
+ },
+};
+
+struct iwl_mvm_scan_params {
+ enum iwl_mvm_scan_type type;
+ u32 n_channels;
+ u16 delay;
+ int n_ssids;
+ struct cfg80211_ssid *ssids;
+ struct ieee80211_channel **channels;
+ u32 flags;
+ u8 *mac_addr;
+ u8 *mac_addr_mask;
+ bool no_cck;
+ bool pass_all;
+ int n_match_sets;
+ struct iwl_scan_probe_req preq;
+ struct cfg80211_match_set *match_sets;
+ int n_scan_plans;
+ struct cfg80211_sched_scan_plan *scan_plans;
+};
+
+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);
+}
+
+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 enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
+{
+ return IWL_MVM_TRAFFIC_LOW;
+}
+
+static enum
+iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
+{
+ int global_cnt = 0;
+ enum iwl_mvm_traffic_load load;
+ bool low_latency;
+
+ ieee80211_iterate_active_interfaces_atomic(mvm->hw,
+ IEEE80211_IFACE_ITER_NORMAL,
+ iwl_mvm_scan_condition_iterator,
+ &global_cnt);
+ if (!global_cnt)
+ return IWL_SCAN_TYPE_UNASSOC;
+
+ load = iwl_mvm_get_traffic_load(mvm);
+ low_latency = iwl_mvm_low_latency(mvm);
+
+ if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
+ fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
+ return IWL_SCAN_TYPE_FRAGMENTED;
+
+ if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
+ return IWL_SCAN_TYPE_MILD;
+
+ return IWL_SCAN_TYPE_WILD;
+}
+
+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);
+
+ /* If this happens, the firmware has mistakenly sent an LMAC
+ * notification during UMAC scans -- warn and ignore it.
+ */
+ if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
+ IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
+ return;
+
+ /* scan status must be locked for proper checking */
+ lockdep_assert_held(&mvm->mutex);
+
+ /* We first check if we were stopping a scan, in which case we
+ * just clear the stopping flag. Then we check if it was a
+ * firmware initiated stop, in which case we need to inform
+ * mac80211.
+ * Note that we can have a stopping and a running scan
+ * simultaneously, but we can't have two different types of
+ * scans stopping or running at the same time (since LMAC
+ * doesn't support it).
+ */
+
+ if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
+ WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
+
+ IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
+ aborted ? "aborted" : "completed",
+ iwl_mvm_ebs_status_str(scan_notif->ebs_status));
+ IWL_DEBUG_SCAN(mvm,
+ "Last line %d, Last iteration %d, Time after last iteration %d\n",
+ scan_notif->last_schedule_line,
+ scan_notif->last_schedule_iteration,
+ __le32_to_cpu(scan_notif->time_after_last_iter));
+
+ mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
+ } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
+ IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
+ aborted ? "aborted" : "completed",
+ iwl_mvm_ebs_status_str(scan_notif->ebs_status));
+
+ mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
+ } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
+ WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
+
+ IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
+ aborted ? "aborted" : "completed",
+ iwl_mvm_ebs_status_str(scan_notif->ebs_status));
+ IWL_DEBUG_SCAN(mvm,
+ "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
+ scan_notif->last_schedule_line,
+ scan_notif->last_schedule_iteration,
+ __le32_to_cpu(scan_notif->time_after_last_iter));
+
+ mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
+ ieee80211_sched_scan_stopped(mvm->hw);
+ } 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 = scan_timing[params->type].dwell_active;
+ cmd->passive_dwell = scan_timing[params->type].dwell_passive;
+ cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
+ cmd->extended_dwell = scan_timing[params->type].dwell_extended;
+ cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
+ cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
+ cmd->scan_prio = 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)
+{
+ 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 &&
+ vif->type != NL80211_IFTYPE_P2P_DEVICE);
+}
+
+static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
+{
+ return params->n_scan_plans == 1 &&
+ params->scan_plans[0].iterations == 1;
+}
+
+static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
+ struct iwl_mvm_scan_params *params,
+ struct ieee80211_vif *vif)
+{
+ int flags = 0;
+
+ if (params->n_ssids == 0)
+ flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
+
+ if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
+ flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
+
+ if (params->type == IWL_SCAN_TYPE_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
+
+ if (iwl_mvm_is_regular_scan(params) &&
+ vif->type != NL80211_IFTYPE_P2P_DEVICE &&
+ params->type != IWL_SCAN_TYPE_FRAGMENTED)
+ flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
+
+ 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 i;
+
+ lockdep_assert_held(&mvm->mutex);
+
+ memset(cmd, 0, ksize(cmd));
+
+ if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
+ return -EINVAL;
+
+ iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
+
+ cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
+ cmd->iter_num = cpu_to_le32(1);
+ cmd->n_channels = (u8)params->n_channels;
+
+ cmd->delay = cpu_to_le32(params->delay);
+
+ cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
+ vif));
+
+ 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;
+
+ for (i = 0; i < params->n_scan_plans; i++) {
+ struct cfg80211_sched_scan_plan *scan_plan =
+ &params->scan_plans[i];
+
+ cmd->schedule[i].delay =
+ cpu_to_le16(scan_plan->interval);
+ cmd->schedule[i].iterations = scan_plan->iterations;
+ cmd->schedule[i].full_scan_mul = 1;
+ }
+
+ /*
+ * If the number of iterations of the last scan plan is set to
+ * zero, it should run infinitely. However, this is not always the case.
+ * For example, when regular scan is requested the driver sets one scan
+ * plan with one iteration.
+ */
+ if (!cmd->schedule[i - 1].iterations)
+ cmd->schedule[i - 1].iterations = 0xff;
+
+ if (iwl_mvm_scan_use_ebs(mvm, vif)) {
+ cmd->channel_opt[0].flags =
+ cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+ IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+ IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+ cmd->channel_opt[0].non_ebs_ratio =
+ cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
+ cmd->channel_opt[1].flags =
+ cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
+ IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
+ IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
+ cmd->channel_opt[1].non_ebs_ratio =
+ cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
+ }
+
+ iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
+ params->n_channels, ssid_bitmap, cmd);
+
+ *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;
+ struct iwl_host_cmd cmd = {
+ .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
+ };
+ enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
+
+ if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
+ return -ENOBUFS;
+
+ if (type == mvm->scan_type)
+ return 0;
+
+ cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
+
+ scan_config = kzalloc(cmd_size, GFP_KERNEL);
+ if (!scan_config)
+ return -ENOMEM;
+
+ 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) |
+ (type == IWL_SCAN_TYPE_FRAGMENTED ?
+ SCAN_CONFIG_FLAG_SET_FRAGMENTED :
+ SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
+ 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(scan_timing[type].max_out_time);
+ scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
+ scan_config->dwell_active = scan_timing[type].dwell_active;
+ scan_config->dwell_passive = scan_timing[type].dwell_passive;
+ scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
+ scan_config->dwell_extended = scan_timing[type].dwell_extended;
+
+ 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);
+ if (!ret)
+ mvm->scan_type = type;
+
+ 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->extended_dwell = scan_timing[params->type].dwell_extended;
+ cmd->active_dwell = scan_timing[params->type].dwell_active;
+ cmd->passive_dwell = scan_timing[params->type].dwell_passive;
+ cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
+ cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
+ cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
+ cmd->scan_priority =
+ iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
+
+ if (iwl_mvm_is_regular_scan(params))
+ 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,
+ struct ieee80211_vif *vif)
+{
+ 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->type == IWL_SCAN_TYPE_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_is_regular_scan(params))
+ 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
+
+ if (iwl_mvm_is_regular_scan(params) &&
+ vif->type != NL80211_IFTYPE_P2P_DEVICE &&
+ params->type != IWL_SCAN_TYPE_FRAGMENTED)
+ flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
+
+ 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, i;
+ u32 ssid_bitmap = 0;
+
+ lockdep_assert_held(&mvm->mutex);
+
+ if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
+ return -EINVAL;
+
+ uid = iwl_mvm_scan_uid_by_status(mvm, 0);
+ if (uid < 0)
+ return uid;
+
+ memset(cmd, 0, ksize(cmd));
+
+ 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,
+ vif));
+
+ if (type == IWL_MVM_SCAN_SCHED)
+ cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
+
+ if (iwl_mvm_scan_use_ebs(mvm, vif))
+ 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);
+
+ for (i = 0; i < params->n_scan_plans; i++) {
+ struct cfg80211_sched_scan_plan *scan_plan =
+ &params->scan_plans[i];
+
+ sec_part->schedule[i].iter_count = scan_plan->iterations;
+ sec_part->schedule[i].interval =
+ cpu_to_le16(scan_plan->interval);
+ }
+
+ /*
+ * If the number of iterations of the last scan plan is set to
+ * zero, it should run infinitely. However, this is not always the case.
+ * For example, when regular scan is requested the driver sets one scan
+ * plan with one iteration.
+ */
+ if (!sec_part->schedule[i - 1].iter_count)
+ sec_part->schedule[i - 1].iter_count = 0xff;
+
+ 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;
+ return 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;
+ struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
+
+ lockdep_assert_held(&mvm->mutex);
+
+ if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
+ IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
+ return -EBUSY;
+ }
+
+ ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
+ if (ret)
+ return ret;
+
+ /* we should have failed registration if scan_cmd was NULL */
+ if (WARN_ON(!mvm->scan_cmd))
+ return -ENOMEM;
+
+ if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
+ return -ENOBUFS;
+
+ params.n_ssids = req->n_ssids;
+ params.flags = req->flags;
+ params.n_channels = req->n_channels;
+ params.delay = 0;
+ params.ssids = req->ssids;
+ params.channels = req->channels;
+ params.mac_addr = req->mac_addr;
+ params.mac_addr_mask = req->mac_addr_mask;
+ params.no_cck = req->no_cck;
+ params.pass_all = true;
+ params.n_match_sets = 0;
+ params.match_sets = NULL;
+
+ params.scan_plans = &scan_plan;
+ params.n_scan_plans = 1;
+
+ params.type =
+ iwl_mvm_get_scan_type(mvm,
+ vif->type == NL80211_IFTYPE_P2P_DEVICE);
+
+ iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
+
+ if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
+ hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
+ ret = iwl_mvm_scan_umac(mvm, vif, &params,
+ IWL_MVM_SCAN_REGULAR);
+ } else {
+ hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
+ ret = iwl_mvm_scan_lmac(mvm, vif, &params);
+ }
+
+ if (ret)
+ return ret;
+
+ ret = iwl_mvm_send_cmd(mvm, &hcmd);
+ if (ret) {
+ /* If the scan failed, it usually means that the FW was unable
+ * to allocate the time events. Warn on it, but maybe we
+ * should try to send the command again with different params.
+ */
+ IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
+ return ret;
+ }
+
+ IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
+ mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
+ iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
+
+ return 0;
+}
+
+int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif,
+ struct cfg80211_sched_scan_request *req,
+ struct ieee80211_scan_ies *ies,
+ int type)
+{
+ struct iwl_host_cmd hcmd = {
+ .len = { iwl_mvm_scan_size(mvm), },
+ .data = { mvm->scan_cmd, },
+ .dataflags = { IWL_HCMD_DFL_NOCOPY, },
+ };
+ struct iwl_mvm_scan_params params = {};
+ int ret;
+
+ 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;
+ if (!req->n_scan_plans)
+ return -EINVAL;
+
+ params.n_scan_plans = req->n_scan_plans;
+ params.scan_plans = req->scan_plans;
+
+ params.type =
+ iwl_mvm_get_scan_type(mvm,
+ vif->type == NL80211_IFTYPE_P2P_DEVICE);
+
+ /* In theory, LMAC scans can handle a 32-bit delay, but since
+ * waiting for over 18 hours to start the scan is a bit silly
+ * and to keep it aligned with UMAC scans (which only support
+ * 16-bit delays), trim it down to 16-bits.
+ */
+ if (req->delay > U16_MAX) {
+ IWL_DEBUG_SCAN(mvm,
+ "delay value is > 16-bits, set to max possible\n");
+ params.delay = U16_MAX;
+ } else {
+ params.delay = req->delay;
+ }
+
+ ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
+ if (ret)
+ return ret;
+
+ iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
+
+ if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
+ hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
+ ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
+ } else {
+ hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
+ ret = iwl_mvm_scan_lmac(mvm, vif, &params);
+ }
+
+ 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));
+ IWL_DEBUG_SCAN(mvm,
+ "Last line %d, Last iteration %d, Time from last iteration %d\n",
+ notif->last_schedule, notif->last_iter,
+ __le32_to_cpu(notif->time_from_last_iter));
+
+ if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
+ notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
+ mvm->last_ebs_successful = false;
+
+ mvm->scan_uid_status[uid] = 0;
+}
+
+void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
+ struct iwl_rx_cmd_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
+ 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 = {};
+ 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,
+ iwl_cmd_id(SCAN_ABORT_UMAC,
+ IWL_ALWAYS_LONG_GROUP, 0),
+ 0, sizeof(cmd), &cmd);
+ if (!ret)
+ mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
+
+ return ret;
+}
+
+static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
+{
+ struct iwl_notification_wait wait_scan_done;
+ static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
+ SCAN_OFFLOAD_COMPLETE, };
+ int ret;
+
+ lockdep_assert_held(&mvm->mutex);
+
+ iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
+ scan_done_notif,
+ ARRAY_SIZE(scan_done_notif),
+ NULL, NULL);
+
+ IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
+
+ if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
+ ret = iwl_mvm_umac_scan_abort(mvm, type);
+ else
+ ret = iwl_mvm_lmac_scan_abort(mvm);
+
+ if (ret) {
+ IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
+ iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
+ return ret;
+ }
+
+ 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;
+}