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android-kvm / linux / 9a754292e88f81acaf26cc5e0cec56b3276029de / . / drivers / net / wireless / intel / iwlwifi / mvm / scan.c
blob: 1cc9c426bb1599eeaf830ca0c34987720c9e366d [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2012-2014, 2018-2024 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include <linux/crc32.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
/* 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
/* minimal number of 2GHz and 5GHz channels in the regular scan request */
#define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
/* Number of iterations on the channel for mei filtered scan */
#define IWL_MEI_SCAN_NUM_ITER 5U
#define WFA_TPC_IE_LEN 9
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;
struct cfg80211_scan_6ghz_params *scan_6ghz_params;
u32 n_6ghz_params;
bool scan_6ghz;
bool enable_6ghz_passive;
bool respect_p2p_go, respect_p2p_go_hb;
s8 tsf_report_link_id;
u8 bssid[ETH_ALEN] __aligned(2);
};
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_V1 |
tx_ant);
else
return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
}
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_mvm_scan_iter_data {
u32 global_cnt;
struct ieee80211_vif *current_vif;
bool is_dcm_with_p2p_go;
};
static void iwl_mvm_scan_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_scan_iter_data *data = _data;
struct iwl_mvm_vif *curr_mvmvif;
if (vif->type != NL80211_IFTYPE_P2P_DEVICE &&
mvmvif->deflink.phy_ctxt &&
mvmvif->deflink.phy_ctxt->id < NUM_PHY_CTX)
data->global_cnt += 1;
if (!data->current_vif || vif == data->current_vif)
return;
curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif);
if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO &&
mvmvif->deflink.phy_ctxt && curr_mvmvif->deflink.phy_ctxt &&
mvmvif->deflink.phy_ctxt->id != curr_mvmvif->deflink.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)
{
struct iwl_mvm_scan_iter_data data = {
.current_vif = vif,
.is_dcm_with_p2p_go = false,
.global_cnt = 0,
};
/*
* A scanning AP interface probably wants to generate a survey to do
* ACS (automatic channel selection).
* Force a non-fragmented scan in that case.
*/
if (vif && ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP)
return IWL_SCAN_TYPE_WILD;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_scan_iterator,
&data);
if (!data.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 P2P GO set all scan requests as
* fast-balance scan
*/
if (vif && vif->type == NL80211_IFTYPE_STATION &&
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 SSID element and WFA TPC element */
max_probe_len -= 24 + 2 + WFA_TPC_IE_LEN;
/* 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 = IWL_AUTH_ALGO_UNSUPPORTED |
IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X |
IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE;
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_mvm_has_new_station_api(mvm->fw)) {
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;
}
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);
ether_addr_copy(frame->bssid, params->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->ies[NL80211_BAND_6GHZ],
ies->len[NL80211_BAND_6GHZ]);
params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
params->preq.band_data[2].len =
cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
pos += ies->len[NL80211_BAND_6GHZ];
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] +
ies->len[NL80211_BAND_6GHZ] <=
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
* 6. the VIF is not an AP interface (scan wants survey results)
*/
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)) &&
ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_AP);
}
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));
band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
cmd->flags = cpu_to_le32(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);
iwl_mvm_scan_set_legacy_probe_req(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[NL80211_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[NL80211_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);
}
static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
struct iwl_scan_dwell *dwell)
{
dwell->active = IWL_SCAN_DWELL_ACTIVE;
dwell->passive = IWL_SCAN_DWELL_PASSIVE;
dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
dwell->extended = IWL_SCAN_DWELL_EXTENDED;
}
static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
u32 max_channels)
{
struct ieee80211_supported_band *band;
int i, j = 0;
band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
channels[j] = band->channels[i].hw_value;
band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
channels[j] = band->channels[i].hw_value;
}
static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
u32 flags, u8 channel_flags,
u32 max_channels)
{
enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
struct iwl_scan_config_v1 *cfg = config;
cfg->flags = cpu_to_le32(flags);
cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
/* This function should not be called when using ADD_STA ver >=12 */
WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
cfg->bcast_sta_id = mvm->aux_sta.sta_id;
cfg->channel_flags = channel_flags;
iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
}
static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
u32 flags, u8 channel_flags,
u32 max_channels)
{
struct iwl_scan_config_v2 *cfg = config;
cfg->flags = cpu_to_le32(flags);
cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
if (iwl_mvm_is_cdb_supported(mvm)) {
enum iwl_mvm_scan_type lb_type, hb_type;
lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
NL80211_BAND_2GHZ);
hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
NL80211_BAND_5GHZ);
cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(scan_timing[lb_type].max_out_time);
cfg->suspend_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(scan_timing[lb_type].suspend_time);
cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(scan_timing[hb_type].max_out_time);
cfg->suspend_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(scan_timing[hb_type].suspend_time);
} else {
enum iwl_mvm_scan_type type =
iwl_mvm_get_scan_type(mvm, NULL);
cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(scan_timing[type].max_out_time);
cfg->suspend_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(scan_timing[type].suspend_time);
}
iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
/* This function should not be called when using ADD_STA ver >=12 */
WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
cfg->bcast_sta_id = mvm->aux_sta.sta_id;
cfg->channel_flags = channel_flags;
iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
}
static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
{
void *cfg;
int ret, cmd_size;
struct iwl_host_cmd cmd = {
.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
};
enum iwl_mvm_scan_type type;
enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
int num_channels =
mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
u32 flags;
u8 channel_flags;
if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
num_channels = mvm->fw->ucode_capa.n_scan_channels;
if (iwl_mvm_is_cdb_supported(mvm)) {
type = iwl_mvm_get_scan_type_band(mvm, NULL,
NL80211_BAND_2GHZ);
hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
NL80211_BAND_5GHZ);
if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
return 0;
} else {
type = iwl_mvm_get_scan_type(mvm, NULL);
if (type == mvm->scan_type)
return 0;
}
if (iwl_mvm_cdb_scan_api(mvm))
cmd_size = sizeof(struct iwl_scan_config_v2);
else
cmd_size = sizeof(struct iwl_scan_config_v1);
cmd_size += mvm->fw->ucode_capa.n_scan_channels;
cfg = kzalloc(cmd_size, GFP_KERNEL);
if (!cfg)
return -ENOMEM;
flags = 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_AUX_STA_ID |
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) |
(iwl_mvm_is_scan_fragmented(type) ?
SCAN_CONFIG_FLAG_SET_FRAGMENTED :
SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
channel_flags = IWL_CHANNEL_FLAG_EBS |
IWL_CHANNEL_FLAG_ACCURATE_EBS |
IWL_CHANNEL_FLAG_EBS_ADD |
IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
/*
* Check for fragmented scan on LMAC2 - high band.
* LMAC1 - low band is checked above.
*/
if (iwl_mvm_cdb_scan_api(mvm)) {
if (iwl_mvm_is_cdb_supported(mvm))
flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
num_channels);
} else {
iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
num_channels);
}
cmd.data[0] = cfg;
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;
mvm->hb_scan_type = hb_type;
}
kfree(cfg);
return ret;
}
int iwl_mvm_config_scan(struct iwl_mvm *mvm)
{
struct iwl_scan_config cfg;
struct iwl_host_cmd cmd = {
.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
.len[0] = sizeof(cfg),
.data[0] = &cfg,
.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
};
if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
return iwl_mvm_legacy_config_scan(mvm);
memset(&cfg, 0, sizeof(cfg));
if (!iwl_mvm_has_new_station_api(mvm->fw)) {
cfg.bcast_sta_id = mvm->aux_sta.sta_id;
} else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) {
/*
* Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
* version 5.
*/
cfg.bcast_sta_id = 0xff;
}
cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
return iwl_mvm_send_cmd(mvm, &cmd);
}
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)
{
struct iwl_mvm_scan_timing_params *timing, *hb_timing;
u8 active_dwell, passive_dwell;
timing = &scan_timing[params->type];
active_dwell = IWL_SCAN_DWELL_ACTIVE;
passive_dwell = IWL_SCAN_DWELL_PASSIVE;
if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
cmd->v7.adwell_default_n_aps_social =
IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
cmd->v7.adwell_default_n_aps =
IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
cmd->v9.adwell_default_hb_n_aps =
IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
/* if custom max budget was configured with debugfs */
if (IWL_MVM_ADWELL_MAX_BUDGET)
cmd->v7.adwell_max_budget =
cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
else if (params->n_ssids && params->ssids[0].ssid_len)
cmd->v7.adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
else
cmd->v7.adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->max_out_time);
cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->suspend_time);
if (iwl_mvm_is_cdb_supported(mvm)) {
hb_timing = &scan_timing[params->hb_type];
cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->max_out_time);
cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->suspend_time);
}
if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
cmd->v7.active_dwell = active_dwell;
cmd->v7.passive_dwell = passive_dwell;
cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
} else {
cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
if (iwl_mvm_is_cdb_supported(mvm)) {
cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
active_dwell;
cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
passive_dwell;
}
}
} else {
cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
cmd->v1.active_dwell = active_dwell;
cmd->v1.passive_dwell = passive_dwell;
cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
if (iwl_mvm_is_cdb_supported(mvm)) {
hb_timing = &scan_timing[params->hb_type];
cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->max_out_time);
cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->suspend_time);
}
if (iwl_mvm_cdb_scan_api(mvm)) {
cmd->v6.scan_priority =
cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->max_out_time);
cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->suspend_time);
} else {
cmd->v1.scan_priority =
cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
cmd->v1.max_out_time =
cpu_to_le32(timing->max_out_time);
cmd->v1.suspend_time =
cpu_to_le32(timing->suspend_time);
}
}
if (iwl_mvm_is_regular_scan(params))
cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
else
cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
}
static u32 iwl_mvm_scan_umac_ooc_priority(int type)
{
if (type == IWL_MVM_SCAN_REGULAR)
return IWL_SCAN_PRIORITY_EXT_6;
if (type == IWL_MVM_SCAN_INT_MLO)
return IWL_SCAN_PRIORITY_EXT_4;
return IWL_SCAN_PRIORITY_EXT_2;
}
static void
iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
struct iwl_scan_general_params_v11 *general_params,
struct iwl_mvm_scan_params *params)
{
struct iwl_mvm_scan_timing_params *timing, *hb_timing;
u8 active_dwell, passive_dwell;
timing = &scan_timing[params->type];
active_dwell = IWL_SCAN_DWELL_ACTIVE;
passive_dwell = IWL_SCAN_DWELL_PASSIVE;
general_params->adwell_default_social_chn =
IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
/* if custom max budget was configured with debugfs */
if (IWL_MVM_ADWELL_MAX_BUDGET)
general_params->adwell_max_budget =
cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
else if (params->n_ssids && params->ssids[0].ssid_len)
general_params->adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
else
general_params->adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->max_out_time);
general_params->suspend_time[SCAN_LB_LMAC_IDX] =
cpu_to_le32(timing->suspend_time);
hb_timing = &scan_timing[params->hb_type];
general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->max_out_time);
general_params->suspend_time[SCAN_HB_LMAC_IDX] =
cpu_to_le32(hb_timing->suspend_time);
general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
}
struct iwl_mvm_scan_channel_segment {
u8 start_idx;
u8 end_idx;
u8 first_channel_id;
u8 last_channel_id;
u8 channel_spacing_shift;
u8 band;
};
static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
{
.start_idx = 0,
.end_idx = 13,
.first_channel_id = 1,
.last_channel_id = 14,
.channel_spacing_shift = 0,
.band = PHY_BAND_24
},
{
.start_idx = 14,
.end_idx = 41,
.first_channel_id = 36,
.last_channel_id = 144,
.channel_spacing_shift = 2,
.band = PHY_BAND_5
},
{
.start_idx = 42,
.end_idx = 50,
.first_channel_id = 149,
.last_channel_id = 181,
.channel_spacing_shift = 2,
.band = PHY_BAND_5
},
{
.start_idx = 51,
.end_idx = 111,
.first_channel_id = 1,
.last_channel_id = 241,
.channel_spacing_shift = 2,
.band = PHY_BAND_6
},
};
static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
{
int i, index;
if (!channel_id)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
const struct iwl_mvm_scan_channel_segment *ch_segment =
&scan_channel_segments[i];
u32 ch_offset;
if (ch_segment->band != band ||
ch_segment->first_channel_id > channel_id ||
ch_segment->last_channel_id < channel_id)
continue;
ch_offset = (channel_id - ch_segment->first_channel_id) >>
ch_segment->channel_spacing_shift;
index = scan_channel_segments[i].start_idx + ch_offset;
if (index < IWL_SCAN_NUM_CHANNELS)
return index;
break;
}
return -EINVAL;
}
static const u8 p2p_go_friendly_chs[] = {
36, 40, 44, 48, 149, 153, 157, 161, 165,
};
static const u8 social_chs[] = {
1, 6, 11
};
static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
u8 ch_id, u8 band, u8 *ch_bitmap,
size_t bitmap_n_entries)
{
int i;
if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
return;
for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
if (p2p_go_friendly_chs[i] == ch_id) {
int ch_idx, bitmap_idx;
ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
if (ch_idx < 0)
return;
bitmap_idx = ch_idx / 8;
if (bitmap_idx >= bitmap_n_entries)
return;
ch_idx = ch_idx % 8;
ch_bitmap[bitmap_idx] |= BIT(ch_idx);
return;
}
}
}
static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
{
int i;
u32 flags = 0;
if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
goto out;
for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
if (p2p_go_friendly_chs[i] == ch_id) {
flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
break;
}
}
if (flags)
goto out;
for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
if (social_chs[i] == ch_id) {
flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
break;
}
}
out:
return flags;
}
static void
iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
struct ieee80211_channel **channels,
int n_channels, u32 flags,
struct iwl_scan_channel_cfg_umac *channel_cfg)
{
int i;
for (i = 0; i < n_channels; i++) {
channel_cfg[i].flags = cpu_to_le32(flags);
channel_cfg[i].v1.channel_num = channels[i]->hw_value;
if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
enum nl80211_band band = channels[i]->band;
channel_cfg[i].v2.band =
iwl_mvm_phy_band_from_nl80211(band);
channel_cfg[i].v2.iter_count = 1;
channel_cfg[i].v2.iter_interval = 0;
} else {
channel_cfg[i].v1.iter_count = 1;
channel_cfg[i].v1.iter_interval = 0;
}
}
}
static void
iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
struct ieee80211_channel **channels,
struct iwl_scan_channel_params_v4 *cp,
int n_channels, u32 flags,
enum nl80211_iftype vif_type)
{
u8 *bitmap = cp->adwell_ch_override_bitmap;
size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
int i;
for (i = 0; i < n_channels; i++) {
enum nl80211_band band = channels[i]->band;
struct iwl_scan_channel_cfg_umac *cfg =
&cp->channel_config[i];
cfg->flags = cpu_to_le32(flags);
cfg->v2.channel_num = channels[i]->hw_value;
cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
cfg->v2.iter_count = 1;
cfg->v2.iter_interval = 0;
iwl_mvm_scan_ch_add_n_aps_override(vif_type,
cfg->v2.channel_num,
cfg->v2.band, bitmap,
bitmap_n_entries);
}
}
static void
iwl_mvm_umac_scan_cfg_channels_v7(struct iwl_mvm *mvm,
struct ieee80211_channel **channels,
struct iwl_scan_channel_params_v7 *cp,
int n_channels, u32 flags,
enum nl80211_iftype vif_type, u32 version)
{
int i;
for (i = 0; i < n_channels; i++) {
enum nl80211_band band = channels[i]->band;
struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
u32 n_aps_flag =
iwl_mvm_scan_ch_n_aps_flag(vif_type,
channels[i]->hw_value);
u8 iwl_band = iwl_mvm_phy_band_from_nl80211(band);
cfg->flags = cpu_to_le32(flags | n_aps_flag);
cfg->v2.channel_num = channels[i]->hw_value;
if (cfg80211_channel_is_psc(channels[i]))
cfg->flags = 0;
if (band == NL80211_BAND_6GHZ) {
/* 6 GHz channels should only appear in a scan request
* that has scan_6ghz set. The only exception is MLO
* scan, which has to be passive.
*/
WARN_ON_ONCE(cfg->flags != 0);
cfg->flags =
cpu_to_le32(IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE);
}
cfg->v2.iter_count = 1;
cfg->v2.iter_interval = 0;
if (version < 17)
cfg->v2.band = iwl_band;
else
cfg->flags |= cpu_to_le32((iwl_band <<
IWL_CHAN_CFG_FLAGS_BAND_POS));
}
}
static void
iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct iwl_scan_probe_params_v4 *pp)
{
int j, idex_s = 0, idex_b = 0;
struct cfg80211_scan_6ghz_params *scan_6ghz_params =
params->scan_6ghz_params;
bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN);
for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE;
j++) {
if (!params->ssids[j].ssid_len)
continue;
pp->short_ssid[idex_s] =
cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
params->ssids[j].ssid_len));
if (hidden_supported) {
pp->direct_scan[idex_s].id = WLAN_EID_SSID;
pp->direct_scan[idex_s].len = params->ssids[j].ssid_len;
memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid,
params->ssids[j].ssid_len);
}
idex_s++;
}
/*
* Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
* collocated parameters. This might not be optimal, as this processing
* does not (yet) correspond to the actual channels, so it is possible
* that some entries would be left out.
*
* TODO: improve this logic.
*/
for (j = 0; j < params->n_6ghz_params; j++) {
int k;
/* First, try to place the short SSID */
if (scan_6ghz_params[j].short_ssid_valid) {
for (k = 0; k < idex_s; k++) {
if (pp->short_ssid[k] ==
cpu_to_le32(scan_6ghz_params[j].short_ssid))
break;
}
if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
pp->short_ssid[idex_s++] =
cpu_to_le32(scan_6ghz_params[j].short_ssid);
}
}
/* try to place BSSID for the same entry */
for (k = 0; k < idex_b; k++) {
if (!memcmp(&pp->bssid_array[k],
scan_6ghz_params[j].bssid, ETH_ALEN))
break;
}
if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE &&
!WARN_ONCE(!is_valid_ether_addr(scan_6ghz_params[j].bssid),
"scan: invalid BSSID at index %u, index_b=%u\n",
j, idex_b)) {
memcpy(&pp->bssid_array[idex_b++],
scan_6ghz_params[j].bssid, ETH_ALEN);
}
}
pp->short_ssid_num = idex_s;
pp->bssid_num = idex_b;
}
/* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v7 */
static u32
iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
u32 n_channels,
struct iwl_scan_probe_params_v4 *pp,
struct iwl_scan_channel_params_v7 *cp,
enum nl80211_iftype vif_type,
u32 version)
{
int i;
struct cfg80211_scan_6ghz_params *scan_6ghz_params =
params->scan_6ghz_params;
u32 ch_cnt;
for (i = 0, ch_cnt = 0; i < params->n_channels; i++) {
struct iwl_scan_channel_cfg_umac *cfg =
&cp->channel_config[ch_cnt];
u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
u8 j, k, n_s_ssids = 0, n_bssids = 0;
u8 max_s_ssids, max_bssids;
bool force_passive = false, found = false, allow_passive = true,
unsolicited_probe_on_chan = false, psc_no_listen = false;
s8 psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
/*
* Avoid performing passive scan on non PSC channels unless the
* scan is specifically a passive scan, i.e., no SSIDs
* configured in the scan command.
*/
if (!cfg80211_channel_is_psc(params->channels[i]) &&
!params->n_6ghz_params && params->n_ssids)
continue;
cfg->v1.channel_num = params->channels[i]->hw_value;
if (version < 17)
cfg->v2.band = PHY_BAND_6;
else
cfg->flags |= cpu_to_le32(PHY_BAND_6 <<
IWL_CHAN_CFG_FLAGS_BAND_POS);
cfg->v5.iter_count = 1;
cfg->v5.iter_interval = 0;
for (j = 0; j < params->n_6ghz_params; j++) {
s8 tmp_psd_20;
if (!(scan_6ghz_params[j].channel_idx == i))
continue;
unsolicited_probe_on_chan |=
scan_6ghz_params[j].unsolicited_probe;
/* Use the highest PSD value allowed as advertised by
* APs for this channel
*/
tmp_psd_20 = scan_6ghz_params[j].psd_20;
if (tmp_psd_20 !=
IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED &&
(psd_20 ==
IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED ||
psd_20 < tmp_psd_20))
psd_20 = tmp_psd_20;
psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
}
/*
* In the following cases apply passive scan:
* 1. Non fragmented scan:
* - PSC channel with NO_LISTEN_FLAG on should be treated
* like non PSC channel
* - Non PSC channel with more than 3 short SSIDs or more
* than 9 BSSIDs.
* - Non PSC Channel with unsolicited probe response and
* more than 2 short SSIDs or more than 6 BSSIDs.
* - PSC channel with more than 2 short SSIDs or more than
* 6 BSSIDs.
* 3. Fragmented scan:
* - PSC channel with more than 1 SSID or 3 BSSIDs.
* - Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
* - Non PSC channel with unsolicited probe response and
* more than 1 SSID or more than 3 BSSIDs.
*/
if (!iwl_mvm_is_scan_fragmented(params->type)) {
if (!cfg80211_channel_is_psc(params->channels[i]) ||
psc_no_listen) {
if (unsolicited_probe_on_chan) {
max_s_ssids = 2;
max_bssids = 6;
} else {
max_s_ssids = 3;
max_bssids = 9;
}
} else {
max_s_ssids = 2;
max_bssids = 6;
}
} else if (cfg80211_channel_is_psc(params->channels[i])) {
max_s_ssids = 1;
max_bssids = 3;
} else {
if (unsolicited_probe_on_chan) {
max_s_ssids = 1;
max_bssids = 3;
} else {
max_s_ssids = 2;
max_bssids = 6;
}
}
/*
* The optimize the scan time, i.e., reduce the scan dwell time
* on each channel, the below logic tries to set 3 direct BSSID
* probe requests for each broadcast probe request with a short
* SSID.
* TODO: improve this logic
*/
for (j = 0; j < params->n_6ghz_params; j++) {
if (!(scan_6ghz_params[j].channel_idx == i))
continue;
found = false;
for (k = 0;
k < pp->short_ssid_num && n_s_ssids < max_s_ssids;
k++) {
if (!scan_6ghz_params[j].unsolicited_probe &&
le32_to_cpu(pp->short_ssid[k]) ==
scan_6ghz_params[j].short_ssid) {
/* Relevant short SSID bit set */
if (s_ssid_bitmap & BIT(k)) {
found = true;
break;
}
/*
* Prefer creating BSSID entries unless
* the short SSID probe can be done in
* the same channel dwell iteration.
*
* We also need to create a short SSID
* entry for any hidden AP.
*/
if (3 * n_s_ssids > n_bssids &&
!pp->direct_scan[k].len)
break;
/* Hidden AP, cannot do passive scan */
if (pp->direct_scan[k].len)
allow_passive = false;
s_ssid_bitmap |= BIT(k);
n_s_ssids++;
found = true;
break;
}
}
if (found)
continue;
for (k = 0; k < pp->bssid_num; k++) {
if (!memcmp(&pp->bssid_array[k],
scan_6ghz_params[j].bssid,
ETH_ALEN)) {
if (!(bssid_bitmap & BIT(k))) {
if (n_bssids < max_bssids) {
bssid_bitmap |= BIT(k);
n_bssids++;
} else {
force_passive = TRUE;
}
}
break;
}
}
}
if (cfg80211_channel_is_psc(params->channels[i]) &&
psc_no_listen)
flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
if (unsolicited_probe_on_chan)
flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
if ((allow_passive && force_passive) ||
(!(bssid_bitmap | s_ssid_bitmap) &&
!cfg80211_channel_is_psc(params->channels[i])))
flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
else
flags |= bssid_bitmap | (s_ssid_bitmap << 16);
cfg->flags |= cpu_to_le32(flags);
if (version >= 17)
cfg->v5.psd_20 = psd_20;
ch_cnt++;
}
if (params->n_channels > ch_cnt)
IWL_DEBUG_SCAN(mvm,
"6GHz: reducing number channels: (%u->%u)\n",
params->n_channels, ch_cnt);
return ch_cnt;
}
static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif)
{
u8 flags = 0;
flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
if (iwl_mvm_scan_use_ebs(mvm, vif))
flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
/* set fragmented ebs for fragmented scan on HB channels */
if ((!iwl_mvm_is_cdb_supported(mvm) &&
iwl_mvm_is_scan_fragmented(params->type)) ||
(iwl_mvm_is_cdb_supported(mvm) &&
iwl_mvm_is_scan_fragmented(params->hb_type)))
flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
/*
* force EBS in case the scan is a fragmented and there is a need to take P2P
* GO operation into consideration during scan operation.
*/
if ((!iwl_mvm_is_cdb_supported(mvm) &&
iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) ||
(iwl_mvm_is_cdb_supported(mvm) &&
iwl_mvm_is_scan_fragmented(params->hb_type) &&
params->respect_p2p_go_hb)) {
IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n");
flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
}
return flags;
}
static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif)
{
struct ieee80211_supported_band *sband =
&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
u32 n_disabled, i;
params->enable_6ghz_passive = false;
if (params->scan_6ghz)
return;
if (!fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: Not supported by FW\n");
return;
}
/* 6GHz passive scan allowed only on station interface */
if (vif->type != NL80211_IFTYPE_STATION) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: not station interface\n");
return;
}
/*
* 6GHz passive scan is allowed in a defined time interval following HW
* reset or resume flow, or while not associated and a large interval
* has passed since the last 6GHz passive scan.
*/
if ((vif->cfg.assoc ||
time_after(mvm->last_6ghz_passive_scan_jiffies +
(IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
(time_before(mvm->last_reset_or_resume_time_jiffies +
(IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
jiffies))) {
IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n",
vif->cfg.assoc ? "associated" :
"timeout did not expire");
return;
}
/* not enough channels in the regular scan request */
if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: not enough channels\n");
return;
}
for (i = 0; i < params->n_ssids; i++) {
if (!params->ssids[i].ssid_len)
break;
}
/* not a wildcard scan, so cannot enable passive 6GHz scan */
if (i == params->n_ssids) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: no wildcard SSID\n");
return;
}
if (!sband || !sband->n_channels) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: no 6GHz channels\n");
return;
}
for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
n_disabled++;
}
/*
* Not all the 6GHz channels are disabled, so no need for 6GHz passive
* scan
*/
if (n_disabled != sband->n_channels) {
IWL_DEBUG_SCAN(mvm,
"6GHz passive scan: 6GHz channels enabled\n");
return;
}
/* all conditions to enable 6ghz passive scan are satisfied */
IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
params->enable_6ghz_passive = true;
}
static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif,
int type)
{
u16 flags = 0;
/*
* If no direct SSIDs are provided perform a passive scan. Otherwise,
* if there is a single SSID which is not the broadcast SSID, assume
* that the scan is intended for roaming purposes and thus enable Rx on
* all chains to improve chances of hearing the beacons/probe responses.
*/
if (params->n_ssids == 0)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
if (iwl_mvm_is_scan_fragmented(params->type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
if (iwl_mvm_is_scan_fragmented(params->hb_type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
if (params->pass_all)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
else
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
if (!iwl_mvm_is_regular_scan(params))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
if (params->iter_notif ||
mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
if (IWL_MVM_ADWELL_ENABLE)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
if (params->enable_6ghz_passive)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
if (iwl_mvm_is_oce_supported(mvm) &&
(params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE;
return flags;
}
static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif, int type,
u16 gen_flags)
{
u8 flags = 0;
if (iwl_mvm_is_cdb_supported(mvm)) {
if (params->respect_p2p_go)
flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB;
if (params->respect_p2p_go_hb)
flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
} else {
if (params->respect_p2p_go)
flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB |
IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
}
if (params->scan_6ghz &&
fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_SCAN_DONT_TOGGLE_ANT))
flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT;
/* Passive and AP interface -> ACS (automatic channel selection) */
if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE &&
ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP &&
iwl_fw_lookup_notif_ver(mvm->fw, SCAN_GROUP, CHANNEL_SURVEY_NOTIF,
0) >= 1)
flags |= IWL_UMAC_SCAN_GEN_FLAGS2_COLLECT_CHANNEL_STATS;
return flags;
}
static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif)
{
u16 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 (iwl_mvm_is_scan_fragmented(params->type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
if (iwl_mvm_is_cdb_supported(mvm) &&
iwl_mvm_is_scan_fragmented(params->hb_type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_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_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;
if (params->iter_notif)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (mvm->scan_iter_notif_enabled)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
#endif
if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
/*
* Extended dwell is relevant only for low band to start with, as it is
* being used for social channles only (1, 6, 11), so we can check
* only scan type on low band also for CDB.
*/
if (iwl_mvm_is_regular_scan(params) &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
!iwl_mvm_is_scan_fragmented(params->type) &&
!iwl_mvm_is_adaptive_dwell_supported(mvm) &&
!iwl_mvm_is_oce_supported(mvm))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
if (iwl_mvm_is_oce_supported(mvm)) {
if ((params->flags &
NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
/* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
* NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
* the same bit, we need to make sure that we use this bit here
* only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
* used. */
if ((params->flags &
NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
!WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
}
return flags;
}
static int
iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
struct iwl_scan_umac_schedule *schedule,
__le16 *delay)
{
int i;
if (WARN_ON(!params->n_scan_plans ||
params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
return -EINVAL;
for (i = 0; i < params->n_scan_plans; i++) {
struct cfg80211_sched_scan_plan *scan_plan =
&params->scan_plans[i];
schedule[i].iter_count = scan_plan->iterations;
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 (!schedule[params->n_scan_plans - 1].iter_count)
schedule[params->n_scan_plans - 1].iter_count = 0xff;
*delay = cpu_to_le16(params->delay);
return 0;
}
static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params,
int type, int uid)
{
struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
struct iwl_scan_umac_chan_param *chan_param;
void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
mvm->fw->ucode_capa.n_scan_channels;
struct iwl_scan_req_umac_tail_v2 *tail_v2 =
(struct iwl_scan_req_umac_tail_v2 *)sec_part;
struct iwl_scan_req_umac_tail_v1 *tail_v1;
struct iwl_ssid_ie *direct_scan;
int ret = 0;
u32 ssid_bitmap = 0;
u8 channel_flags = 0;
u16 gen_flags;
struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
iwl_mvm_scan_umac_dwell(mvm, cmd, params);
cmd->uid = cpu_to_le32(uid);
gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
cmd->general_flags = cpu_to_le16(gen_flags);
if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
IWL_SCAN_NUM_OF_FRAGS;
if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
IWL_SCAN_NUM_OF_FRAGS;
cmd->v8.general_flags2 =
IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
}
cmd->scan_start_mac_id = scan_vif->id;
if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
if (iwl_mvm_scan_use_ebs(mvm, vif)) {
channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
/* set fragmented ebs for fragmented scan on HB channels */
if (iwl_mvm_is_frag_ebs_supported(mvm)) {
if (gen_flags &
IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
(!iwl_mvm_is_cdb_supported(mvm) &&
gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
}
}
chan_param->flags = channel_flags;
chan_param->count = params->n_channels;
ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
&tail_v2->delay);
if (ret)
return ret;
if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
tail_v2->preq = params->preq;
direct_scan = tail_v2->direct_scan;
} else {
tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
&params->preq);
direct_scan = tail_v1->direct_scan;
}
iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
params->n_channels, ssid_bitmap,
cmd_data);
return 0;
}
static void
iwl_mvm_scan_umac_fill_general_p_v12(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_general_params_v11 *gp,
u16 gen_flags, u8 gen_flags2,
u32 version)
{
struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
iwl_mvm_scan_umac_dwell_v11(mvm, gp, params);
IWL_DEBUG_SCAN(mvm, "General: flags=0x%x, flags2=0x%x\n",
gen_flags, gen_flags2);
gp->flags = cpu_to_le16(gen_flags);
gp->flags2 = gen_flags2;
if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
mvm->scan_link_id = 0;
if (version < 16) {
gp->scan_start_mac_or_link_id = scan_vif->id;
} else {
struct iwl_mvm_vif_link_info *link_info =
scan_vif->link[params->tsf_report_link_id];
mvm->scan_link_id = params->tsf_report_link_id;
if (!WARN_ON(!link_info))
gp->scan_start_mac_or_link_id = link_info->fw_link_id;
}
}
static void
iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
struct iwl_scan_probe_params_v3 *pp)
{
pp->preq = params->preq;
pp->ssid_num = params->n_ssids;
iwl_scan_build_ssids(params, pp->direct_scan, NULL);
}
static void
iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
struct iwl_scan_probe_params_v4 *pp,
u32 *bitmap_ssid)
{
pp->preq = params->preq;
iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
}
static void
iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_channel_params_v4 *cp,
u32 channel_cfg_flags)
{
cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
cp->count = params->n_channels;
cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
params->n_channels,
channel_cfg_flags,
vif->type);
}
static void
iwl_mvm_scan_umac_fill_ch_p_v7(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_channel_params_v7 *cp,
u32 channel_cfg_flags,
u32 version)
{
cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
cp->count = params->n_channels;
cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
iwl_mvm_umac_scan_cfg_channels_v7(mvm, params->channels, cp,
params->n_channels,
channel_cfg_flags,
vif->type, version);
if (params->enable_6ghz_passive) {
struct ieee80211_supported_band *sband =
&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
u32 i;
for (i = 0; i < sband->n_channels; i++) {
struct ieee80211_channel *channel =
&sband->channels[i];
struct iwl_scan_channel_cfg_umac *cfg =
&cp->channel_config[cp->count];
if (!cfg80211_channel_is_psc(channel))
continue;
cfg->v5.channel_num = channel->hw_value;
cfg->v5.iter_count = 1;
cfg->v5.iter_interval = 0;
if (version < 17) {
cfg->flags = 0;
cfg->v2.band = PHY_BAND_6;
} else {
cfg->flags = cpu_to_le32(PHY_BAND_6 <<
IWL_CHAN_CFG_FLAGS_BAND_POS);
cfg->v5.psd_20 =
IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
}
cp->count++;
}
}
}
static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type,
int uid)
{
struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
int ret;
u16 gen_flags;
cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(type));
cmd->uid = cpu_to_le32(uid);
gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
&scan_p->general_params,
gen_flags, 0, 12);
ret = iwl_mvm_fill_scan_sched_params(params,
scan_p->periodic_params.schedule,
&scan_p->periodic_params.delay);
if (ret)
return ret;
iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
&scan_p->channel_params, 0);
return 0;
}
static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params,
int type, int uid, u32 version)
{
struct iwl_scan_req_umac_v17 *cmd = mvm->scan_cmd;
struct iwl_scan_req_params_v17 *scan_p = &cmd->scan_params;
struct iwl_scan_channel_params_v7 *cp = &scan_p->channel_params;
struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
int ret;
u16 gen_flags;
u8 gen_flags2;
u32 bitmap_ssid = 0;
cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(type));
cmd->uid = cpu_to_le32(uid);
gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
if (version >= 15)
gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type,
gen_flags);
else
gen_flags2 = 0;
iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
&scan_p->general_params,
gen_flags, gen_flags2, version);
ret = iwl_mvm_fill_scan_sched_params(params,
scan_p->periodic_params.schedule,
&scan_p->periodic_params.delay);
if (ret)
return ret;
if (!params->scan_6ghz) {
iwl_mvm_scan_umac_fill_probe_p_v4(params,
&scan_p->probe_params,
&bitmap_ssid);
iwl_mvm_scan_umac_fill_ch_p_v7(mvm, params, vif,
&scan_p->channel_params,
bitmap_ssid,
version);
return 0;
} else {
pb->preq = params->preq;
}
cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb);
cp->count = iwl_mvm_umac_scan_cfg_channels_v7_6g(mvm, params,
params->n_channels,
pb, cp, vif->type,
version);
if (!cp->count)
return -EINVAL;
if (!params->n_ssids ||
(params->n_ssids == 1 && !params->ssids[0].ssid_len))
cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
return 0;
}
static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type,
int uid)
{
return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14);
}
static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type,
int uid)
{
return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15);
}
static int iwl_mvm_scan_umac_v16(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type,
int uid)
{
return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 16);
}
static int iwl_mvm_scan_umac_v17(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type,
int uid)
{
return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 17);
}
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)
{
bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
/* 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.
*/
/* FW supports only a single periodic scan */
if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
return -EBUSY;
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:
/* For non-unified images, there's 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.
*/
if (!unified_image)
return 0;
/* If this is a unified image and we ran out of scans,
* we need to stop something. Prefer stopping regular
* scans, because the results are useless at this
* point, and we should be able to keep running
* another scheduled scan while suspended.
*/
if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
true);
if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
true);
/* Something is wrong if no scan was running but we
* ran out of scans.
*/
fallthrough;
default:
WARN_ON(1);
break;
}
return -EIO;
}
#define SCAN_TIMEOUT 30000
void iwl_mvm_scan_timeout_wk(struct work_struct *work)
{
struct delayed_work *delayed_work = to_delayed_work(work);
struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
scan_timeout_dwork);
IWL_ERR(mvm, "regular scan timed out\n");
iwl_force_nmi(mvm->trans);
}
static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif)
{
if (iwl_mvm_is_cdb_supported(mvm)) {
params->type =
iwl_mvm_get_scan_type_band(mvm, vif,
NL80211_BAND_2GHZ);
params->hb_type =
iwl_mvm_get_scan_type_band(mvm, vif,
NL80211_BAND_5GHZ);
} else {
params->type = iwl_mvm_get_scan_type(mvm, vif);
}
}
struct iwl_scan_umac_handler {
u8 version;
int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct iwl_mvm_scan_params *params, int type, int uid);
};
#define IWL_SCAN_UMAC_HANDLER(_ver) { \
.version = _ver, \
.handler = iwl_mvm_scan_umac_v##_ver, \
}
static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
/* set the newest version first to shorten the list traverse time */
IWL_SCAN_UMAC_HANDLER(17),
IWL_SCAN_UMAC_HANDLER(16),
IWL_SCAN_UMAC_HANDLER(15),
IWL_SCAN_UMAC_HANDLER(14),
IWL_SCAN_UMAC_HANDLER(12),
};
static void iwl_mvm_mei_scan_work(struct work_struct *wk)
{
struct iwl_mei_scan_filter *scan_filter =
container_of(wk, struct iwl_mei_scan_filter, scan_work);
struct iwl_mvm *mvm =
container_of(scan_filter, struct iwl_mvm, mei_scan_filter);
struct iwl_mvm_csme_conn_info *info;
struct sk_buff *skb;
u8 bssid[ETH_ALEN];
mutex_lock(&mvm->mutex);
info = iwl_mvm_get_csme_conn_info(mvm);
memcpy(bssid, info->conn_info.bssid, ETH_ALEN);
mutex_unlock(&mvm->mutex);
while ((skb = skb_dequeue(&scan_filter->scan_res))) {
struct ieee80211_mgmt *mgmt = (void *)skb->data;
if (!memcmp(mgmt->bssid, bssid, ETH_ALEN))
ieee80211_rx_irqsafe(mvm->hw, skb);
else
kfree_skb(skb);
}
}
void iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter *mei_scan_filter)
{
skb_queue_head_init(&mei_scan_filter->scan_res);
INIT_WORK(&mei_scan_filter->scan_work, iwl_mvm_mei_scan_work);
}
/* In case CSME is connected and has link protection set, this function will
* override the scan request to scan only the associated channel and only for
* the associated SSID.
*/
static void iwl_mvm_mei_limited_scan(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params)
{
struct iwl_mvm_csme_conn_info *info = iwl_mvm_get_csme_conn_info(mvm);
struct iwl_mei_conn_info *conn_info;
struct ieee80211_channel *chan;
int scan_iters, i;
if (!info) {
IWL_DEBUG_SCAN(mvm, "mei_limited_scan: no connection info\n");
return;
}
conn_info = &info->conn_info;
if (!info->conn_info.lp_state || !info->conn_info.ssid_len)
return;
if (!params->n_channels || !params->n_ssids)
return;
mvm->mei_scan_filter.is_mei_limited_scan = true;
chan = ieee80211_get_channel(mvm->hw->wiphy,
ieee80211_channel_to_frequency(conn_info->channel,
conn_info->band));
if (!chan) {
IWL_DEBUG_SCAN(mvm,
"Failed to get CSME channel (chan=%u band=%u)\n",
conn_info->channel, conn_info->band);
return;
}
/* The mei filtered scan must find the AP, otherwise CSME will
* take the NIC ownership. Add several iterations on the channel to
* make the scan more robust.
*/
scan_iters = min(IWL_MEI_SCAN_NUM_ITER, params->n_channels);
params->n_channels = scan_iters;
for (i = 0; i < scan_iters; i++)
params->channels[i] = chan;
IWL_DEBUG_SCAN(mvm, "Mei scan: num iterations=%u\n", scan_iters);
params->n_ssids = 1;
params->ssids[0].ssid_len = conn_info->ssid_len;
memcpy(params->ssids[0].ssid, conn_info->ssid, conn_info->ssid_len);
}
static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_host_cmd *hcmd,
struct iwl_mvm_scan_params *params,
int type)
{
int uid, i, err;
u8 scan_ver;
lockdep_assert_held(&mvm->mutex);
memset(mvm->scan_cmd, 0, mvm->scan_cmd_size);
iwl_mvm_mei_limited_scan(mvm, params);
if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
return iwl_mvm_scan_lmac(mvm, vif, params);
}
uid = iwl_mvm_scan_uid_by_status(mvm, 0);
if (uid < 0)
return uid;
hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC);
scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
IWL_FW_CMD_VER_UNKNOWN);
for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
const struct iwl_scan_umac_handler *ver_handler =
&iwl_scan_umac_handlers[i];
if (ver_handler->version != scan_ver)
continue;
err = ver_handler->handler(mvm, vif, params, type, uid);
return err ? : uid;
}
err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
if (err)
return err;
return uid;
}
struct iwl_mvm_scan_respect_p2p_go_iter_data {
struct ieee80211_vif *current_vif;
bool p2p_go;
enum nl80211_band band;
};
static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
/* exclude the given vif */
if (vif == data->current_vif)
return;
if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO) {
u32 link_id;
for (link_id = 0;
link_id < ARRAY_SIZE(mvmvif->link);
link_id++) {
struct iwl_mvm_vif_link_info *link =
mvmvif->link[link_id];
if (link && link->phy_ctxt->id < NUM_PHY_CTX &&
(data->band == NUM_NL80211_BANDS ||
link->phy_ctxt->channel->band == data->band)) {
data->p2p_go = true;
break;
}
}
}
}
static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
bool low_latency,
enum nl80211_band band)
{
struct iwl_mvm_scan_respect_p2p_go_iter_data data = {
.current_vif = vif,
.p2p_go = false,
.band = band,
};
if (!low_latency)
return false;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_scan_respect_p2p_go_iter,
&data);
return data.p2p_go;
}
static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
enum nl80211_band band)
{
bool low_latency = iwl_mvm_low_latency_band(mvm, band);
return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band);
}
static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
bool low_latency = iwl_mvm_low_latency(mvm);
return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency,
NUM_NL80211_BANDS);
}
static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm,
struct iwl_mvm_scan_params *params,
struct ieee80211_vif *vif)
{
if (iwl_mvm_is_cdb_supported(mvm)) {
params->respect_p2p_go =
iwl_mvm_get_respect_p2p_go_band(mvm, vif,
NL80211_BAND_2GHZ);
params->respect_p2p_go_hb =
iwl_mvm_get_respect_p2p_go_band(mvm, vif,
NL80211_BAND_5GHZ);
} else {
params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif);
}
}
static int _iwl_mvm_single_scan_start(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct cfg80211_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, uid;
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, 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.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;
ether_addr_copy(params.bssid, req->bssid);
params.scan_plans = &scan_plan;
params.n_scan_plans = 1;
params.n_6ghz_params = req->n_6ghz_params;
params.scan_6ghz_params = req->scan_6ghz_params;
params.scan_6ghz = req->scan_6ghz;
iwl_mvm_fill_scan_type(mvm, &params, vif);
iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
if (req->duration)
params.iter_notif = true;
params.tsf_report_link_id = req->tsf_report_link_id;
if (params.tsf_report_link_id < 0) {
if (vif->active_links)
params.tsf_report_link_id = __ffs(vif->active_links);
else
params.tsf_report_link_id = 0;
}
iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
iwl_mvm_scan_6ghz_passive_scan(mvm, &params, vif);
uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
if (uid < 0)
return uid;
iwl_mvm_pause_tcm(mvm, false);
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);
iwl_mvm_resume_tcm(mvm);
return ret;
}
IWL_DEBUG_SCAN(mvm, "Scan request send success: type=%u, uid=%u\n",
type, uid);
mvm->scan_uid_status[uid] = type;
mvm->scan_status |= type;
if (type == IWL_MVM_SCAN_REGULAR) {
mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
schedule_delayed_work(&mvm->scan_timeout_dwork,
msecs_to_jiffies(SCAN_TIMEOUT));
}
if (params.enable_6ghz_passive)
mvm->last_6ghz_passive_scan_jiffies = jiffies;
return 0;
}
int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct cfg80211_scan_request *req,
struct ieee80211_scan_ies *ies)
{
return _iwl_mvm_single_scan_start(mvm, vif, req, ies,
IWL_MVM_SCAN_REGULAR);
}
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, uid;
int i, j;
bool non_psc_included = false;
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;
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;
eth_broadcast_addr(params.bssid);
if (!req->n_scan_plans)
return -EINVAL;
params.n_scan_plans = req->n_scan_plans;
params.scan_plans = req->scan_plans;
iwl_mvm_fill_scan_type(mvm, &params, vif);
iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
/* 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);
/* for 6 GHZ band only PSC channels need to be added */
for (i = 0; i < params.n_channels; i++) {
struct ieee80211_channel *channel = params.channels[i];
if (channel->band == NL80211_BAND_6GHZ &&
!cfg80211_channel_is_psc(channel)) {
non_psc_included = true;
break;
}
}
if (non_psc_included) {
params.channels = kmemdup(params.channels,
sizeof(params.channels[0]) *
params.n_channels,
GFP_KERNEL);
if (!params.channels)
return -ENOMEM;
for (i = j = 0; i < params.n_channels; i++) {
if (params.channels[i]->band == NL80211_BAND_6GHZ &&
!cfg80211_channel_is_psc(params.channels[i]))
continue;
params.channels[j++] = params.channels[i];
}
params.n_channels = j;
}
if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
ret = -ENOBUFS;
goto out;
}
uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
if (uid < 0) {
ret = uid;
goto out;
}
ret = iwl_mvm_send_cmd(mvm, &hcmd);
if (!ret) {
IWL_DEBUG_SCAN(mvm,
"Sched scan request send success: type=%u, uid=%u\n",
type, uid);
mvm->scan_uid_status[uid] = type;
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);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
}
out:
if (non_psc_included)
kfree(params.channels);
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);
bool select_links = false;
mvm->mei_scan_filter.is_mei_limited_scan = false;
IWL_DEBUG_SCAN(mvm,
"Scan completed: uid=%u type=%u, status=%s, EBS=%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, "Scan completed: scan_status=0x%x\n",
mvm->scan_status);
IWL_DEBUG_SCAN(mvm,
"Scan completed: line=%u, iter=%u, elapsed time=%u\n",
notif->last_schedule, notif->last_iter,
__le32_to_cpu(notif->time_from_last_iter));
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) {
struct cfg80211_scan_info info = {
.aborted = aborted,
.scan_start_tsf = mvm->scan_start,
};
struct iwl_mvm_vif *scan_vif = mvm->scan_vif;
struct iwl_mvm_vif_link_info *link_info =
scan_vif->link[mvm->scan_link_id];
/* It is possible that by the time the scan is complete the link
* was already removed and is not valid.
*/
if (link_info)
memcpy(info.tsf_bssid, link_info->bssid, ETH_ALEN);
else
IWL_DEBUG_SCAN(mvm, "Scan link is no longer valid\n");
ieee80211_scan_completed(mvm->hw, &info);
mvm->scan_vif = NULL;
cancel_delayed_work(&mvm->scan_timeout_dwork);
iwl_mvm_resume_tcm(mvm);
} else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
ieee80211_sched_scan_stopped(mvm->hw);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
} else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_INT_MLO) {
IWL_DEBUG_SCAN(mvm, "Internal MLO scan completed\n");
/*
* Other scan types won't necessarily scan for the MLD links channels.
* Therefore, only select links after successful internal scan.
*/
select_links = notif->status == IWL_SCAN_OFFLOAD_COMPLETED;
}
mvm->scan_status &= ~mvm->scan_uid_status[uid];
IWL_DEBUG_SCAN(mvm, "Scan completed: after update: scan_status=0x%x\n",
mvm->scan_status);
if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
mvm->last_ebs_successful = false;
mvm->scan_uid_status[uid] = 0;
if (select_links)
wiphy_work_queue(mvm->hw->wiphy, &mvm->trig_link_selection_wk);
}
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;
mvm->scan_start = le64_to_cpu(notif->start_tsf);
IWL_DEBUG_SCAN(mvm,
"UMAC Scan 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;
}
IWL_DEBUG_SCAN(mvm,
"UMAC Scan iteration complete: scan started at %llu (TSF)\n",
mvm->scan_start);
}
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,
WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC),
CMD_SEND_IN_RFKILL, sizeof(cmd), &cmd);
if (!ret)
mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
IWL_DEBUG_SCAN(mvm, "Scan abort: ret=%d\n", ret);
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;
}
return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
1 * HZ);
}
static size_t iwl_scan_req_umac_get_size(u8 scan_ver)
{
switch (scan_ver) {
case 12:
return sizeof(struct iwl_scan_req_umac_v12);
case 14:
case 15:
case 16:
case 17:
return sizeof(struct iwl_scan_req_umac_v17);
}
return 0;
}
size_t iwl_mvm_scan_size(struct iwl_mvm *mvm)
{
int base_size, tail_size;
u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
IWL_FW_CMD_VER_UNKNOWN);
base_size = iwl_scan_req_umac_get_size(scan_ver);
if (base_size)
return base_size;
if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
else if (iwl_mvm_cdb_scan_api(mvm))
base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
else
base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
if (iwl_mvm_is_scan_ext_chan_supported(mvm))
tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
else
tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
return base_size +
sizeof(struct iwl_scan_channel_cfg_umac) *
mvm->fw->ucode_capa.n_scan_channels +
tail_size;
}
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_v1);
}
/*
* 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) {
struct cfg80211_scan_info info = {
.aborted = true,
};
cancel_delayed_work(&mvm->scan_timeout_dwork);
ieee80211_scan_completed(mvm->hw, &info);
mvm->scan_uid_status[uid] = 0;
}
uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
if (uid >= 0) {
/* Sched scan will be restarted by mac80211 in
* restart_hw, so do not report if FW is about to be
* restarted.
*/
if (!mvm->fw_restart)
ieee80211_sched_scan_stopped(mvm->hw);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
mvm->scan_uid_status[uid] = 0;
}
uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_INT_MLO);
if (uid >= 0) {
IWL_DEBUG_SCAN(mvm, "Internal MLO scan aborted\n");
mvm->scan_uid_status[uid] = 0;
}
uid = iwl_mvm_scan_uid_by_status(mvm,
IWL_MVM_SCAN_STOPPING_REGULAR);
if (uid >= 0)
mvm->scan_uid_status[uid] = 0;
uid = iwl_mvm_scan_uid_by_status(mvm,
IWL_MVM_SCAN_STOPPING_SCHED);
if (uid >= 0)
mvm->scan_uid_status[uid] = 0;
uid = iwl_mvm_scan_uid_by_status(mvm,
IWL_MVM_SCAN_STOPPING_INT_MLO);
if (uid >= 0)
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) {
struct cfg80211_scan_info info = {
.aborted = true,
};
cancel_delayed_work(&mvm->scan_timeout_dwork);
ieee80211_scan_completed(mvm->hw, &info);
}
/* 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->fw_restart) {
ieee80211_sched_scan_stopped(mvm->hw);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
}
}
}
int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
{
int ret;
IWL_DEBUG_SCAN(mvm,
"Request to stop scan: type=0x%x, status=0x%x\n",
type, mvm->scan_status);
if (!(mvm->scan_status & type))
return 0;
if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
ret = 0;
goto out;
}
ret = iwl_mvm_scan_stop_wait(mvm, type);
if (!ret)
mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
else
IWL_DEBUG_SCAN(mvm, "Failed to stop scan\n");
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) {
cancel_delayed_work(&mvm->scan_timeout_dwork);
if (notify) {
struct cfg80211_scan_info info = {
.aborted = true,
};
ieee80211_scan_completed(mvm->hw, &info);
}
} else if (notify) {
ieee80211_sched_scan_stopped(mvm->hw);
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
}
return ret;
}
static int iwl_mvm_int_mlo_scan_start(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct ieee80211_channel **channels,
size_t n_channels)
{
struct cfg80211_scan_request *req = NULL;
struct ieee80211_scan_ies ies = {};
size_t size, i;
int ret;
lockdep_assert_held(&mvm->mutex);
IWL_DEBUG_SCAN(mvm, "Starting Internal MLO scan: n_channels=%zu\n",
n_channels);
if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif))
return -EINVAL;
size = struct_size(req, channels, n_channels);
req = kzalloc(size, GFP_KERNEL);
if (!req)
return -ENOMEM;
/* set the requested channels */
for (i = 0; i < n_channels; i++)
req->channels[i] = channels[i];
req->n_channels = n_channels;
/* set the rates */
for (i = 0; i < NUM_NL80211_BANDS; i++)
if (mvm->hw->wiphy->bands[i])
req->rates[i] =
(1 << mvm->hw->wiphy->bands[i]->n_bitrates) - 1;
req->wdev = ieee80211_vif_to_wdev(vif);
req->wiphy = mvm->hw->wiphy;
req->scan_start = jiffies;
req->tsf_report_link_id = -1;
ret = _iwl_mvm_single_scan_start(mvm, vif, req, &ies,
IWL_MVM_SCAN_INT_MLO);
kfree(req);
IWL_DEBUG_SCAN(mvm, "Internal MLO scan: ret=%d\n", ret);
return ret;
}
int iwl_mvm_int_mlo_scan(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct ieee80211_channel *channels[IEEE80211_MLD_MAX_NUM_LINKS];
unsigned long usable_links = ieee80211_vif_usable_links(vif);
size_t n_channels = 0;
u8 link_id;
lockdep_assert_held(&mvm->mutex);
if (mvm->scan_status & IWL_MVM_SCAN_INT_MLO) {
IWL_DEBUG_SCAN(mvm, "Internal MLO scan is already running\n");
return -EBUSY;
}
rcu_read_lock();
for_each_set_bit(link_id, &usable_links, IEEE80211_MLD_MAX_NUM_LINKS) {
struct ieee80211_bss_conf *link_conf =
rcu_dereference(vif->link_conf[link_id]);
if (WARN_ON_ONCE(!link_conf))
continue;
channels[n_channels++] = link_conf->chanreq.oper.chan;
}
rcu_read_unlock();
if (!n_channels)
return -EINVAL;
return iwl_mvm_int_mlo_scan_start(mvm, vif, channels, n_channels);
}
static int iwl_mvm_chanidx_from_phy(struct iwl_mvm *mvm,
enum nl80211_band band,
u16 phy_chan_num)
{
struct ieee80211_supported_band *sband = mvm->hw->wiphy->bands[band];
int chan_idx;
if (WARN_ON_ONCE(!sband))
return -EINVAL;
for (chan_idx = 0; chan_idx < sband->n_channels; chan_idx++) {
struct ieee80211_channel *channel = &sband->channels[chan_idx];
if (channel->hw_value == phy_chan_num)
return chan_idx;
}
return -EINVAL;
}
static u32 iwl_mvm_div_by_db(u32 value, u8 db)
{
/*
* 2^32 * 10**(i / 10) for i = [1, 10], skipping 0 and simply stopping
* at 10 dB and looping instead of using a much larger table.
*
* Using 64 bit math is overkill, but means the helper does not require
* a limit on the input range.
*/
static const u32 db_to_val[] = {
0xcb59185e, 0xa1866ba8, 0x804dce7a, 0x65ea59fe, 0x50f44d89,
0x404de61f, 0x331426af, 0x2892c18b, 0x203a7e5b, 0x1999999a,
};
while (value && db > 0) {
u8 change = min_t(u8, db, ARRAY_SIZE(db_to_val));
value = (((u64)value) * db_to_val[change - 1]) >> 32;
db -= change;
}
return value;
}
VISIBLE_IF_IWLWIFI_KUNIT s8
iwl_mvm_average_dbm_values(const struct iwl_umac_scan_channel_survey_notif *notif)
{
s8 average_magnitude;
u32 average_factor;
s8 sum_magnitude = -128;
u32 sum_factor = 0;
int i, count = 0;
/*
* To properly average the decibel values (signal values given in dBm)
* we need to do the math in linear space. Doing a linear average of
* dB (dBm) values is a bit annoying though due to the large range of
* at least -10 to -110 dBm that will not fit into a 32 bit integer.
*
* A 64 bit integer should be sufficient, but then we still have the
* problem that there are no directly usable utility functions
* available.
*
* So, lets not deal with that and instead do much of the calculation
* with a 16.16 fixed point integer along with a base in dBm. 16.16 bit
* gives us plenty of head-room for adding up a few values and even
* doing some math on it. And the tail should be accurate enough too
* (1/2^16 is somewhere around -48 dB, so effectively zero).
*
* i.e. the real value of sum is:
* sum = sum_factor / 2^16 * 10^(sum_magnitude / 10) mW
*
* However, that does mean we need to be able to bring two values to
* a common base, so we need a helper for that.
*
* Note that this function takes an input with unsigned negative dBm
* values but returns a signed dBm (i.e. a negative value).
*/
for (i = 0; i < ARRAY_SIZE(notif->noise); i++) {
s8 val_magnitude;
u32 val_factor;
if (notif->noise[i] == 0xff)
continue;
val_factor = 0x10000;
val_magnitude = -notif->noise[i];
if (val_magnitude <= sum_magnitude) {
u8 div_db = sum_magnitude - val_magnitude;
val_factor = iwl_mvm_div_by_db(val_factor, div_db);
val_magnitude = sum_magnitude;
} else {
u8 div_db = val_magnitude - sum_magnitude;
sum_factor = iwl_mvm_div_by_db(sum_factor, div_db);
sum_magnitude = val_magnitude;
}
sum_factor += val_factor;
count++;
}
/* No valid noise measurement, return a very high noise level */
if (count == 0)
return 0;
average_magnitude = sum_magnitude;
average_factor = sum_factor / count;
/*
* average_factor will be a number smaller than 1.0 (0x10000) at this
* point. What we need to do now is to adjust average_magnitude so that
* average_factor is between -0.5 dB and 0.5 dB.
*
* Just do -1 dB steps and find the point where
* -0.5 dB * -i dB = 0x10000 * 10^(-0.5/10) / i dB
* = div_by_db(0xe429, i)
* is smaller than average_factor.
*/
for (i = 0; average_factor < iwl_mvm_div_by_db(0xe429, i); i++) {
/* nothing */
}
return average_magnitude - i;
}
EXPORT_SYMBOL_IF_IWLWIFI_KUNIT(iwl_mvm_average_dbm_values);
void iwl_mvm_rx_channel_survey_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
const struct iwl_umac_scan_channel_survey_notif *notif =
(void *)pkt->data;
struct iwl_mvm_acs_survey_channel *info;
enum nl80211_band band;
int chan_idx;
lockdep_assert_held(&mvm->mutex);
if (!mvm->acs_survey) {
size_t n_channels = 0;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!mvm->hw->wiphy->bands[band])
continue;
n_channels += mvm->hw->wiphy->bands[band]->n_channels;
}
mvm->acs_survey = kzalloc(struct_size(mvm->acs_survey,
channels, n_channels),
GFP_KERNEL);
if (!mvm->acs_survey)
return;
mvm->acs_survey->n_channels = n_channels;
n_channels = 0;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!mvm->hw->wiphy->bands[band])
continue;
mvm->acs_survey->bands[band] =
&mvm->acs_survey->channels[n_channels];
n_channels += mvm->hw->wiphy->bands[band]->n_channels;
}
}
band = iwl_mvm_nl80211_band_from_phy(le32_to_cpu(notif->band));
chan_idx = iwl_mvm_chanidx_from_phy(mvm, band,
le32_to_cpu(notif->channel));
if (WARN_ON_ONCE(chan_idx < 0))
return;
IWL_DEBUG_SCAN(mvm, "channel survey received for freq %d\n",
mvm->hw->wiphy->bands[band]->channels[chan_idx].center_freq);
info = &mvm->acs_survey->bands[band][chan_idx];
/* Times are all in ms */
info->time = le32_to_cpu(notif->active_time);
info->time_busy = le32_to_cpu(notif->busy_time);
info->time_rx = le32_to_cpu(notif->rx_time);
info->time_tx = le32_to_cpu(notif->tx_time);
info->noise = iwl_mvm_average_dbm_values(notif);
}