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scan.c
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scan.c
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/******************************************************************************
*
* 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
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
*
* 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.
*
* 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
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
* 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"
#include "iwl-io.h"
#define IWL_DENSE_EBS_SCAN_RATIO 5
#define IWL_SPARSE_EBS_SCAN_RATIO 1
#define IWL_SCAN_DWELL_ACTIVE 10
#define IWL_SCAN_DWELL_PASSIVE 110
#define IWL_SCAN_DWELL_FRAGMENTED 44
#define IWL_SCAN_DWELL_EXTENDED 90
#define IWL_SCAN_NUM_OF_FRAGS 3
#define IWL_SCAN_LAST_2_4_CHN 14
/* adaptive dwell max budget time [TU] for full scan */
#define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
/* adaptive dwell max budget time [TU] for directed scan */
#define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
/* adaptive dwell default high band APs number */
#define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
/* adaptive dwell default low band APs number */
#define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
/* adaptive dwell default APs number in social channels (1, 6, 11) */
#define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
/* number of scan channels */
#define IWL_SCAN_NUM_CHANNELS 112
/* adaptive dwell number of APs override mask for p2p friendly GO */
#define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20)
/* adaptive dwell number of APs override mask for social channels */
#define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21)
/* adaptive dwell number of APs override for p2p friendly GO channels */
#define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10
/* adaptive dwell number of APs override for social channels */
#define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
struct iwl_mvm_scan_timing_params {
u32 suspend_time;
u32 max_out_time;
};
static struct iwl_mvm_scan_timing_params scan_timing[] = {
[IWL_SCAN_TYPE_UNASSOC] = {
.suspend_time = 0,
.max_out_time = 0,
},
[IWL_SCAN_TYPE_WILD] = {
.suspend_time = 30,
.max_out_time = 120,
},
[IWL_SCAN_TYPE_MILD] = {
.suspend_time = 120,
.max_out_time = 120,
},
[IWL_SCAN_TYPE_FRAGMENTED] = {
.suspend_time = 95,
.max_out_time = 44,
},
[IWL_SCAN_TYPE_FAST_BALANCE] = {
.suspend_time = 30,
.max_out_time = 37,
},
};
struct iwl_mvm_scan_params {
/* For CDB this is low band scan type, for non-CDB - type. */
enum iwl_mvm_scan_type type;
enum iwl_mvm_scan_type hb_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;
bool iter_notif;
};
static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
{
struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
return (void *)&cmd->v8.data;
if (iwl_mvm_is_adaptive_dwell_supported(mvm))
return (void *)&cmd->v7.data;
if (iwl_mvm_cdb_scan_api(mvm))
return (void *)&cmd->v6.data;
return (void *)&cmd->v1.data;
}
static inline struct iwl_scan_umac_chan_param *
iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
{
struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
return &cmd->v8.channel;
if (iwl_mvm_is_adaptive_dwell_supported(mvm))
return &cmd->v7.channel;
if (iwl_mvm_cdb_scan_api(mvm))
return &cmd->v6.channel;
return &cmd->v1.channel;
}
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 inline __le32
iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
bool no_cck)
{
u32 tx_ant;
iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
if (band == NL80211_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 < NUM_PHY_CTX)
*global_cnt += 1;
}
static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
{
return mvm->tcm.result.global_load;
}
static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
{
return mvm->tcm.result.band_load[band];
}
struct iwl_is_dcm_with_go_iterator_data {
struct ieee80211_vif *current_vif;
bool is_dcm_with_p2p_go;
};
static void iwl_mvm_is_dcm_with_go_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_is_dcm_with_go_iterator_data *data = _data;
struct iwl_mvm_vif *other_mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_vif *curr_mvmvif =
iwl_mvm_vif_from_mac80211(data->current_vif);
/* exclude the given vif */
if (vif == data->current_vif)
return;
if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
other_mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt &&
other_mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id)
data->is_dcm_with_p2p_go = true;
}
static enum
iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
enum iwl_mvm_traffic_load load,
bool low_latency)
{
int global_cnt = 0;
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;
if (fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
(!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
return IWL_SCAN_TYPE_FRAGMENTED;
/* in case of DCM with GO where BSS DTIM interval < 220msec
* set all scan requests as fast-balance scan
* */
if (vif && vif->type == NL80211_IFTYPE_STATION &&
vif->bss_conf.dtim_period < 220) {
struct iwl_is_dcm_with_go_iterator_data data = {
.current_vif = vif,
.is_dcm_with_p2p_go = false,
};
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_is_dcm_with_go_iterator,
&data);
if (data.is_dcm_with_p2p_go)
return IWL_SCAN_TYPE_FAST_BALANCE;
}
}
if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
return IWL_SCAN_TYPE_MILD;
return IWL_SCAN_TYPE_WILD;
}
static enum
iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
enum iwl_mvm_traffic_load load;
bool low_latency;
load = iwl_mvm_get_traffic_load(mvm);
low_latency = iwl_mvm_low_latency(mvm);
return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
}
static enum
iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
enum nl80211_band band)
{
enum iwl_mvm_traffic_load load;
bool low_latency;
load = iwl_mvm_get_traffic_load_band(mvm, band);
low_latency = iwl_mvm_low_latency_band(mvm, band);
return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
}
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;
}
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;
IWL_DEBUG_SCAN(mvm,
"Scan offload iteration complete: status=0x%x scanned channels=%d\n",
notif->status, notif->scanned_channels);
if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
ieee80211_sched_scan_results(mvm->hw);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
}
}
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);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
} else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
struct cfg80211_scan_info info = {
.aborted = aborted,
};
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, &info);
cancel_delayed_work(&mvm->scan_timeout_dwork);
iwl_mvm_resume_tcm(mvm);
} else {
IWL_ERR(mvm,
"got scan complete notification but no scan is running\n");
}
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;
u32 tmp_bitmap = 0;
/*
* 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 */
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);
tmp_bitmap |= BIT(i);
} else {
tmp_bitmap |= BIT(index);
}
}
if (ssid_bitmap)
*ssid_bitmap = tmp_bitmap;
}
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_v1 *profile_cfg_v1;
struct iwl_scan_offload_blocklist *blocklist;
struct iwl_scan_offload_profile_cfg_data *data;
int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
int profile_cfg_size = sizeof(*data) +
sizeof(*profile) * max_profiles;
struct iwl_host_cmd cmd = {
.id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
.len[1] = profile_cfg_size,
.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
.dataflags[1] = IWL_HCMD_DFL_NOCOPY,
};
int blocklist_len;
int i;
int ret;
if (WARN_ON(req->n_match_sets > max_profiles))
return -EIO;
if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
else
blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL);
if (!blocklist)
return -ENOMEM;
profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
if (!profile_cfg_v1) {
ret = -ENOMEM;
goto free_blocklist;
}
cmd.data[0] = blocklist;
cmd.len[0] = sizeof(*blocklist) * blocklist_len;
cmd.data[1] = profile_cfg_v1;
/* if max_profile is MAX_PROFILES_V2, we have the new API */
if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
struct iwl_scan_offload_profile_cfg *profile_cfg =
(struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
data = &profile_cfg->data;
} else {
data = &profile_cfg_v1->data;
}
/* No blocklist configuration */
data->num_profiles = req->n_match_sets;
data->active_clients = SCAN_CLIENT_SCHED_SCAN;
data->pass_match = SCAN_CLIENT_SCHED_SCAN;
data->match_notify = SCAN_CLIENT_SCHED_SCAN;
if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
for (i = 0; i < req->n_match_sets; i++) {
profile = &profile_cfg_v1->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_v1);
free_blocklist:
kfree(blocklist);
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);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
return false;
}
IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
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 = CAN_ABORT_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,
NL80211_BAND_2GHZ,
no_cck);
if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
ADD_STA,
0) < 12) {
tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
/*
* Fw doesn't use this sta anymore, pending deprecation via HOST API
* change
*/
} else {
tx_cmd[0].sta_id = 0xff;
tx_cmd[1].sta_id = 0xff;
}
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,
NL80211_BAND_5GHZ,
no_cck);
}
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;
}
#define WFA_TPC_IE_LEN 9
static void iwl_mvm_add_tpc_report_ie(u8 *pos)
{
pos[0] = WLAN_EID_VENDOR_SPECIFIC;
pos[1] = WFA_TPC_IE_LEN - 2;
pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
pos[4] = WLAN_OUI_MICROSOFT & 0xff;
pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
pos[6] = 0;
/* pos[7] - tx power will be inserted by the FW */
pos[7] = 0;
pos[8] = 0;
}
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[NL80211_BAND_2GHZ],
ies->len[NL80211_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[NL80211_BAND_5GHZ],
ies->len[NL80211_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[NL80211_BAND_5GHZ]);
pos += ies->len[NL80211_BAND_5GHZ];
memcpy(pos, ies->common_ies, ies->common_ie_len);
params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
if (iwl_mvm_rrm_scan_needed(mvm) &&
!fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
WFA_TPC_IE_LEN);
} else {
params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
}
}
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 = IWL_SCAN_DWELL_ACTIVE;
cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
cmd->extended_dwell = IWL_SCAN_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 = cpu_to_le32(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;
bool low_latency;
if (iwl_mvm_is_cdb_supported(mvm))
low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
else
low_latency = iwl_mvm_low_latency(mvm);
/* 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.
* 5. we are not in low latency mode,
* or if fragmented ebs is supported by the FW
*/
return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
(!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
}
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 bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
{
return (type == IWL_SCAN_TYPE_FRAGMENTED ||
type == IWL_SCAN_TYPE_FAST_BALANCE);
}
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 (iwl_mvm_is_scan_fragmented(params->type))
flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
if (iwl_mvm_rrm_scan_needed(mvm) &&
fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
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 (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
if (iwl_mvm_is_regular_scan(params) &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
!iwl_mvm_is_scan_fragmented(params->type))
flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
return flags;
}
static void
iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
struct iwl_scan_probe_req *src_p_req)
{
int i;
p_req->mac_header = src_p_req->mac_header;
for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
p_req->band_data[i] = src_p_req->band_data[i];
p_req->common_data = src_p_req->common_data;
memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
}
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_v1 *preq =
(void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
mvm->fw->ucode_capa.n_scan_channels);
u32 ssid_bitmap = 0;
int i;
u8 band;
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));