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linux/drivers/net/wireless/intel/iwlwifi/mld/scan.c
Benjamin Berg 0dd86ab21d wifi: iwlwifi: mld: support channel survey collection for ACS scans 
The firmware is able to collect channel statistics when doing passive
scans. Enable the flag when doing a passive scan on an AP interface and
collect the survey information.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250723094230.a659ef1b1fd8.I24a9a0383327c231f36be170968bc7bac801f9f2@changeid
2025-07-23 14:10:24 +03:00

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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2024-2025 Intel Corporation
*/
#include <linux/crc32.h>
#include "iwl-utils.h"
#include "mld.h"
#include "scan.h"
#include "hcmd.h"
#include "iface.h"
#include "phy.h"
#include "mlo.h"
#include "fw/api/scan.h"
#include "fw/dbg.h"
#define IWL_SCAN_DWELL_ACTIVE 10
#define IWL_SCAN_DWELL_PASSIVE 110
#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 for P2P social channels (1, 6, 11) */
#define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
/* 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 P2P social channels */
#define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
/* 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)
#define SCAN_TIMEOUT_MSEC (30000 * HZ)
/* minimal number of 2GHz and 5GHz channels in the regular scan request */
#define IWL_MLD_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
enum iwl_mld_scan_type {
IWL_SCAN_TYPE_NOT_SET,
IWL_SCAN_TYPE_UNASSOC,
IWL_SCAN_TYPE_WILD,
IWL_SCAN_TYPE_MILD,
IWL_SCAN_TYPE_FRAGMENTED,
IWL_SCAN_TYPE_FAST_BALANCE,
};
struct iwl_mld_scan_timing_params {
u32 suspend_time;
u32 max_out_time;
};
static const struct iwl_mld_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_mld_scan_params {
enum iwl_mld_scan_type type;
u32 n_channels;
u16 delay;
int n_ssids;
struct cfg80211_ssid *ssids;
struct ieee80211_channel **channels;
u32 flags;
u8 *mac_addr;
u8 *mac_addr_mask;
bool no_cck;
bool pass_all;
int n_match_sets;
struct iwl_scan_probe_req preq;
struct cfg80211_match_set *match_sets;
int n_scan_plans;
struct cfg80211_sched_scan_plan *scan_plans;
bool iter_notif;
bool respect_p2p_go;
u8 fw_link_id;
struct cfg80211_scan_6ghz_params *scan_6ghz_params;
u32 n_6ghz_params;
bool scan_6ghz;
bool enable_6ghz_passive;
u8 bssid[ETH_ALEN] __aligned(2);
};
struct iwl_mld_scan_respect_p2p_go_iter_data {
struct ieee80211_vif *current_vif;
bool p2p_go;
};
static void iwl_mld_scan_respect_p2p_go_iter(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mld_scan_respect_p2p_go_iter_data *data = _data;
/* exclude the given vif */
if (vif == data->current_vif)
return;
/* TODO: CDB check the band of the GO */
if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO &&
iwl_mld_vif_from_mac80211(vif)->ap_ibss_active)
data->p2p_go = true;
}
static bool iwl_mld_get_respect_p2p_go(struct iwl_mld *mld,
struct ieee80211_vif *vif,
bool low_latency)
{
struct iwl_mld_scan_respect_p2p_go_iter_data data = {
.current_vif = vif,
.p2p_go = false,
};
if (!low_latency)
return false;
ieee80211_iterate_active_interfaces_mtx(mld->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mld_scan_respect_p2p_go_iter,
&data);
return data.p2p_go;
}
struct iwl_mld_scan_iter_data {
struct ieee80211_vif *current_vif;
bool active_vif;
bool is_dcm_with_p2p_go;
bool global_low_latency;
};
static void iwl_mld_scan_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mld_scan_iter_data *data = _data;
struct ieee80211_vif *curr_vif = data->current_vif;
struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
struct iwl_mld_vif *curr_mld_vif;
unsigned long curr_vif_active_links;
u16 link_id;
data->global_low_latency |= iwl_mld_vif_low_latency(mld_vif);
if ((ieee80211_vif_is_mld(vif) && vif->active_links) ||
(vif->type != NL80211_IFTYPE_P2P_DEVICE &&
mld_vif->deflink.active))
data->active_vif = true;
if (vif == curr_vif)
return;
if (ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_P2P_GO)
return;
/* Currently P2P GO can't be AP MLD so the logic below assumes that */
WARN_ON_ONCE(ieee80211_vif_is_mld(vif));
curr_vif_active_links =
ieee80211_vif_is_mld(curr_vif) ? curr_vif->active_links : 1;
curr_mld_vif = iwl_mld_vif_from_mac80211(curr_vif);
for_each_set_bit(link_id, &curr_vif_active_links,
IEEE80211_MLD_MAX_NUM_LINKS) {
struct iwl_mld_link *curr_mld_link =
iwl_mld_link_dereference_check(curr_mld_vif, link_id);
if (WARN_ON(!curr_mld_link))
return;
if (rcu_access_pointer(curr_mld_link->chan_ctx) &&
rcu_access_pointer(mld_vif->deflink.chan_ctx) !=
rcu_access_pointer(curr_mld_link->chan_ctx)) {
data->is_dcm_with_p2p_go = true;
return;
}
}
}
static enum
iwl_mld_scan_type iwl_mld_get_scan_type(struct iwl_mld *mld,
struct ieee80211_vif *vif,
struct iwl_mld_scan_iter_data *data)
{
enum iwl_mld_traffic_load load = mld->scan.traffic_load.status;
/* 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 (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP)
return IWL_SCAN_TYPE_WILD;
if (!data->active_vif)
return IWL_SCAN_TYPE_UNASSOC;
if ((load == IWL_MLD_TRAFFIC_HIGH || data->global_low_latency) &&
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->type == NL80211_IFTYPE_STATION &&
data->is_dcm_with_p2p_go)
return IWL_SCAN_TYPE_FAST_BALANCE;
if (load >= IWL_MLD_TRAFFIC_MEDIUM || data->global_low_latency)
return IWL_SCAN_TYPE_MILD;
return IWL_SCAN_TYPE_WILD;
}
static u8 *
iwl_mld_scan_add_2ghz_elems(struct iwl_mld *mld, 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;
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_mld_scan_add_tpc_report_elem(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 u32
iwl_mld_scan_ooc_priority(enum iwl_mld_scan_status scan_status)
{
if (scan_status == IWL_MLD_SCAN_REGULAR)
return IWL_SCAN_PRIORITY_EXT_6;
if (scan_status == IWL_MLD_SCAN_INT_MLO)
return IWL_SCAN_PRIORITY_EXT_4;
return IWL_SCAN_PRIORITY_EXT_2;
}
static bool
iwl_mld_scan_is_regular(struct iwl_mld_scan_params *params)
{
return params->n_scan_plans == 1 &&
params->scan_plans[0].iterations == 1;
}
static bool
iwl_mld_scan_is_fragmented(enum iwl_mld_scan_type type)
{
return (type == IWL_SCAN_TYPE_FRAGMENTED ||
type == IWL_SCAN_TYPE_FAST_BALANCE);
}
static int
iwl_mld_scan_uid_by_status(struct iwl_mld *mld, int status)
{
for (int i = 0; i < ARRAY_SIZE(mld->scan.uid_status); i++)
if (mld->scan.uid_status[i] == status)
return i;
return -ENOENT;
}
static const char *
iwl_mld_scan_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";
}
}
static int
iwl_mld_scan_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
{
for (int i = 0; i < PROBE_OPTION_MAX; i++) {
if (!ssid_list[i].len)
return -1;
if (ssid_list[i].len == ssid_len &&
!memcmp(ssid_list[i].ssid, ssid, ssid_len))
return i;
}
return -1;
}
static bool
iwl_mld_scan_fits(struct iwl_mld *mld, int n_ssids,
struct ieee80211_scan_ies *ies, int n_channels)
{
return ((n_ssids <= PROBE_OPTION_MAX) &&
(n_channels <= mld->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_mld_scan_max_template_size()));
}
static void
iwl_mld_scan_build_probe_req(struct iwl_mld *mld, struct ieee80211_vif *vif,
struct ieee80211_scan_ies *ies,
struct iwl_mld_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;
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_mld_scan_add_2ghz_elems(mld,
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);
iwl_mld_scan_add_tpc_report_elem(pos + ies->common_ie_len);
params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
WFA_TPC_IE_LEN);
}
static u16
iwl_mld_scan_get_cmd_gen_flags(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
enum iwl_mld_scan_status scan_status)
{
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 (params->pass_all)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
else
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
if (iwl_mld_scan_is_fragmented(params->type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
if (!iwl_mld_scan_is_regular(params))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
if (params->iter_notif ||
mld->scan.pass_all_sched_res == SCHED_SCAN_PASS_ALL_STATE_ENABLED)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
if (scan_status == IWL_MLD_SCAN_SCHED ||
scan_status == IWL_MLD_SCAN_NETDETECT)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
if (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;
if ((scan_status == IWL_MLD_SCAN_SCHED ||
scan_status == IWL_MLD_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;
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
return flags;
}
static u8
iwl_mld_scan_get_cmd_gen_flags2(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
enum iwl_mld_scan_status scan_status,
u16 gen_flags)
{
u8 flags = 0;
/* TODO: CDB */
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)
flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT;
/* For AP interfaces, request survey data for regular scans and if
* it is supported. For non-AP interfaces, EBS will be enabled and
* the results may be missing information for some channels.
*/
if (scan_status == IWL_MLD_SCAN_REGULAR &&
ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP &&
gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE &&
iwl_fw_lookup_notif_ver(mld->fw, SCAN_GROUP,
CHANNEL_SURVEY_NOTIF, 0) >= 1)
flags |= IWL_UMAC_SCAN_GEN_FLAGS2_COLLECT_CHANNEL_STATS;
return flags;
}
static void
iwl_mld_scan_cmd_set_dwell(struct iwl_mld *mld,
struct iwl_scan_general_params_v11 *gp,
struct iwl_mld_scan_params *params)
{
const struct iwl_mld_scan_timing_params *timing =
&scan_timing[params->type];
gp->adwell_default_social_chn =
IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
gp->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
gp->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
if (params->n_ssids && params->ssids[0].ssid_len)
gp->adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
else
gp->adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
gp->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
gp->max_out_of_time[SCAN_LB_LMAC_IDX] = cpu_to_le32(timing->max_out_time);
gp->suspend_time[SCAN_LB_LMAC_IDX] = cpu_to_le32(timing->suspend_time);
gp->active_dwell[SCAN_LB_LMAC_IDX] = IWL_SCAN_DWELL_ACTIVE;
gp->passive_dwell[SCAN_LB_LMAC_IDX] = IWL_SCAN_DWELL_PASSIVE;
gp->active_dwell[SCAN_HB_LMAC_IDX] = IWL_SCAN_DWELL_ACTIVE;
gp->passive_dwell[SCAN_HB_LMAC_IDX] = IWL_SCAN_DWELL_PASSIVE;
IWL_DEBUG_SCAN(mld,
"Scan: adwell_max_budget=%d max_out_of_time=%d suspend_time=%d\n",
gp->adwell_max_budget,
gp->max_out_of_time[SCAN_LB_LMAC_IDX],
gp->suspend_time[SCAN_LB_LMAC_IDX]);
}
static void
iwl_mld_scan_cmd_set_gen_params(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_general_params_v11 *gp,
enum iwl_mld_scan_status scan_status)
{
u16 gen_flags = iwl_mld_scan_get_cmd_gen_flags(mld, params, vif,
scan_status);
u8 gen_flags2 = iwl_mld_scan_get_cmd_gen_flags2(mld, params, vif,
scan_status,
gen_flags);
IWL_DEBUG_SCAN(mld, "General: flags=0x%x, flags2=0x%x\n",
gen_flags, gen_flags2);
gp->flags = cpu_to_le16(gen_flags);
gp->flags2 = gen_flags2;
iwl_mld_scan_cmd_set_dwell(mld, gp, params);
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 (params->fw_link_id != IWL_MLD_INVALID_FW_ID)
gp->scan_start_mac_or_link_id = params->fw_link_id;
}
static int
iwl_mld_scan_cmd_set_sched_params(struct iwl_mld_scan_params *params,
struct iwl_scan_umac_schedule *schedule,
__le16 *delay)
{
if (WARN_ON(!params->n_scan_plans ||
params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
return -EINVAL;
for (int 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;
}
/* We insert the SSIDs in an inverted order, because the FW will
* invert it back.
*/
static void
iwl_mld_scan_cmd_build_ssids(struct iwl_mld_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 match_sets */
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_mld_scan_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 void
iwl_mld_scan_fill_6g_chan_list(struct iwl_mld_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;
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));
/* hidden 6ghz scan */
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.
*/
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;
}
static void
iwl_mld_scan_cmd_set_probe_params(struct iwl_mld_scan_params *params,
struct iwl_scan_probe_params_v4 *pp,
u32 *bitmap_ssid)
{
pp->preq = params->preq;
if (params->scan_6ghz) {
iwl_mld_scan_fill_6g_chan_list(params, pp);
return;
}
/* relevant only for 2.4 GHz /5 GHz scan */
iwl_mld_scan_cmd_build_ssids(params, pp->direct_scan, bitmap_ssid);
}
static bool
iwl_mld_scan_use_ebs(struct iwl_mld *mld, struct ieee80211_vif *vif,
bool low_latency)
{
const struct iwl_ucode_capabilities *capa = &mld->fw->ucode_capa;
/* We can only use EBS if:
* 1. the feature is supported.
* 2. the last EBS was successful.
* 3. it's not a p2p find operation.
* 4. we are not in low latency mode,
* or if fragmented ebs is supported by the FW
* 5. the VIF is not an AP interface (scan wants survey results)
*/
return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
!mld->scan.last_ebs_failed &&
vif->type != NL80211_IFTYPE_P2P_DEVICE &&
(!low_latency || fw_has_api(capa, IWL_UCODE_TLV_API_FRAG_EBS)) &&
ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_AP);
}
static u8
iwl_mld_scan_cmd_set_chan_flags(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
bool low_latency)
{
u8 flags = 0;
flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
if (iwl_mld_scan_use_ebs(mld, vif, low_latency))
flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
/* set fragmented ebs for fragmented scan */
if (iwl_mld_scan_is_fragmented(params->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.
*/
/* TODO: CDB */
if (iwl_mld_scan_is_fragmented(params->type) &&
params->respect_p2p_go) {
IWL_DEBUG_SCAN(mld, "Respect P2P GO. Force EBS\n");
flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
}
return flags;
}
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 u32 iwl_mld_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
{
if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
return 0;
for (int i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
if (ch_id == p2p_go_friendly_chs[i])
return IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
}
for (int i = 0; i < ARRAY_SIZE(social_chs); i++) {
if (ch_id == social_chs[i])
return IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
}
return 0;
}
static void
iwl_mld_scan_cmd_set_channels(struct iwl_mld *mld,
struct ieee80211_channel **channels,
struct iwl_scan_channel_params_v7 *cp,
int n_channels, u32 flags,
enum nl80211_iftype vif_type)
{
for (int i = 0; i < n_channels; i++) {
enum nl80211_band band = channels[i]->band;
struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
u8 iwl_band = iwl_mld_nl80211_band_to_fw(band);
u32 n_aps_flag =
iwl_mld_scan_ch_n_aps_flag(vif_type,
channels[i]->hw_value);
if (IWL_MLD_ADAPTIVE_DWELL_NUM_APS_OVERRIDE)
n_aps_flag = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
cfg->flags = cpu_to_le32(flags | n_aps_flag);
cfg->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;
cfg->flags |= cpu_to_le32(iwl_band <<
IWL_CHAN_CFG_FLAGS_BAND_POS);
}
}
static u8
iwl_mld_scan_cfg_channels_6g(struct iwl_mld *mld,
struct iwl_mld_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)
{
struct cfg80211_scan_6ghz_params *scan_6ghz_params =
params->scan_6ghz_params;
u32 i;
u8 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 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->channel_num = params->channels[i]->hw_value;
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 (u32 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.
* 2. 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_mld_scan_is_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;
}
}
/* To 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.
*/
for (u32 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))
continue;
if (bssid_bitmap & BIT(k))
break;
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);
cfg->v5.psd_20 = psd_20;
ch_cnt++;
}
if (params->n_channels > ch_cnt)
IWL_DEBUG_SCAN(mld,
"6GHz: reducing number channels: (%u->%u)\n",
params->n_channels, ch_cnt);
return ch_cnt;
}
static int
iwl_mld_scan_cmd_set_6ghz_chan_params(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_req_params_v17 *scan_p,
enum iwl_mld_scan_status scan_status)
{
struct iwl_scan_channel_params_v7 *chan_p = &scan_p->channel_params;
struct iwl_scan_probe_params_v4 *probe_p = &scan_p->probe_params;
chan_p->flags = iwl_mld_scan_get_cmd_gen_flags(mld, params, vif,
scan_status);
chan_p->count = iwl_mld_scan_cfg_channels_6g(mld, params,
params->n_channels,
probe_p, chan_p,
vif->type);
if (!chan_p->count)
return -EINVAL;
if (!params->n_ssids ||
(params->n_ssids == 1 && !params->ssids[0].ssid_len))
chan_p->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
return 0;
}
static int
iwl_mld_scan_cmd_set_chan_params(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif,
struct iwl_scan_req_params_v17 *scan_p,
bool low_latency,
enum iwl_mld_scan_status scan_status,
u32 channel_cfg_flags)
{
struct iwl_scan_channel_params_v7 *cp = &scan_p->channel_params;
struct ieee80211_supported_band *sband =
&mld->nvm_data->bands[NL80211_BAND_6GHZ];
cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
if (IWL_MLD_ADAPTIVE_DWELL_NUM_APS_OVERRIDE)
cp->n_aps_override[0] = IWL_MLD_ADAPTIVE_DWELL_NUM_APS_OVERRIDE;
if (params->scan_6ghz)
return iwl_mld_scan_cmd_set_6ghz_chan_params(mld, params,
vif, scan_p,
scan_status);
/* relevant only for 2.4 GHz/5 GHz scan */
cp->flags = iwl_mld_scan_cmd_set_chan_flags(mld, params, vif,
low_latency);
cp->count = params->n_channels;
iwl_mld_scan_cmd_set_channels(mld, params->channels, cp,
params->n_channels, channel_cfg_flags,
vif->type);
if (!params->enable_6ghz_passive)
return 0;
/* fill 6 GHz passive scan cfg */
for (int 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->channel_num = channel->hw_value;
cfg->v5.iter_count = 1;
cfg->v5.iter_interval = 0;
cfg->v5.psd_20 =
IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
cfg->flags = cpu_to_le32(PHY_BAND_6 <<
IWL_CHAN_CFG_FLAGS_BAND_POS);
cp->count++;
}
return 0;
}
static int
iwl_mld_scan_build_cmd(struct iwl_mld *mld, struct ieee80211_vif *vif,
struct iwl_mld_scan_params *params,
enum iwl_mld_scan_status scan_status,
bool low_latency)
{
struct iwl_scan_req_umac_v17 *cmd = mld->scan.cmd;
struct iwl_scan_req_params_v17 *scan_p = &cmd->scan_params;
u32 bitmap_ssid = 0;
int uid, ret;
memset(mld->scan.cmd, 0, mld->scan.cmd_size);
/* find a free UID entry */
uid = iwl_mld_scan_uid_by_status(mld, IWL_MLD_SCAN_NONE);
if (uid < 0)
return uid;
cmd->uid = cpu_to_le32(uid);
cmd->ooc_priority =
cpu_to_le32(iwl_mld_scan_ooc_priority(scan_status));
iwl_mld_scan_cmd_set_gen_params(mld, params, vif,
&scan_p->general_params, scan_status);
ret = iwl_mld_scan_cmd_set_sched_params(params,
scan_p->periodic_params.schedule,
&scan_p->periodic_params.delay);
if (ret)
return ret;
iwl_mld_scan_cmd_set_probe_params(params, &scan_p->probe_params,
&bitmap_ssid);
ret = iwl_mld_scan_cmd_set_chan_params(mld, params, vif, scan_p,
low_latency, scan_status,
bitmap_ssid);
if (ret)
return ret;
return uid;
}
static bool
iwl_mld_scan_pass_all(struct iwl_mld *mld,
struct cfg80211_sched_scan_request *req)
{
if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
IWL_DEBUG_SCAN(mld,
"Sending scheduled scan with filtering, n_match_sets %d\n",
req->n_match_sets);
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_DISABLED;
return false;
}
IWL_DEBUG_SCAN(mld, "Sending Scheduled scan without filtering\n");
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_ENABLED;
return true;
}
static int
iwl_mld_config_sched_scan_profiles(struct iwl_mld *mld,
struct cfg80211_sched_scan_request *req)
{
struct iwl_host_cmd hcmd = {
.id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
};
struct iwl_scan_offload_profile *profile;
struct iwl_scan_offload_profile_cfg_data *cfg_data;
struct iwl_scan_offload_profile_cfg *profile_cfg;
struct iwl_scan_offload_blocklist *blocklist;
u32 blocklist_size = IWL_SCAN_MAX_BLACKLIST_LEN * sizeof(*blocklist);
u32 cmd_size = blocklist_size + sizeof(*profile_cfg);
u8 *cmd;
int ret;
if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES_V2))
return -EIO;
cmd = kzalloc(cmd_size, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
hcmd.data[0] = cmd;
hcmd.len[0] = cmd_size;
blocklist = (struct iwl_scan_offload_blocklist *)cmd;
profile_cfg = (struct iwl_scan_offload_profile_cfg *)(cmd + blocklist_size);
/* No blocklist configuration */
cfg_data = &profile_cfg->data;
cfg_data->num_profiles = req->n_match_sets;
cfg_data->active_clients = SCAN_CLIENT_SCHED_SCAN;
cfg_data->pass_match = SCAN_CLIENT_SCHED_SCAN;
cfg_data->match_notify = SCAN_CLIENT_SCHED_SCAN;
if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
cfg_data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
for (int i = 0; i < req->n_match_sets; i++) {
profile = &profile_cfg->profiles[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;
profile->ssid_index = i;
}
IWL_DEBUG_SCAN(mld,
"Sending scheduled scan profile config (n_match_sets=%u)\n",
req->n_match_sets);
ret = iwl_mld_send_cmd(mld, &hcmd);
kfree(cmd);
return ret;
}
static int
iwl_mld_sched_scan_handle_non_psc_channels(struct iwl_mld_scan_params *params,
bool *non_psc_included)
{
int i, j;
*non_psc_included = false;
/* 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)
return 0;
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;
return 0;
}
static void
iwl_mld_scan_6ghz_passive_scan(struct iwl_mld *mld,
struct iwl_mld_scan_params *params,
struct ieee80211_vif *vif)
{
struct ieee80211_supported_band *sband =
&mld->nvm_data->bands[NL80211_BAND_6GHZ];
u32 n_disabled, i;
params->enable_6ghz_passive = false;
/* 6 GHz passive scan may be enabled in the first 2.4 GHz/5 GHz scan
* phase to discover geo location if no AP's are found. Skip it when
* we're in the 6 GHz scan phase.
*/
if (params->scan_6ghz)
return;
/* 6 GHz passive scan allowed only on station interface */
if (vif->type != NL80211_IFTYPE_STATION) {
IWL_DEBUG_SCAN(mld,
"6GHz passive scan: not station interface\n");
return;
}
/* 6 GHz 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 6 GHz passive scan.
*/
if ((vif->cfg.assoc ||
time_after(mld->scan.last_6ghz_passive_jiffies +
(IWL_MLD_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
(time_before(mld->scan.last_start_time_jiffies +
(IWL_MLD_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
jiffies))) {
IWL_DEBUG_SCAN(mld, "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_MLD_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
IWL_DEBUG_SCAN(mld,
"6GHz passive scan: not enough channels %d\n",
params->n_channels);
return;
}
for (i = 0; i < params->n_ssids; i++) {
if (!params->ssids[i].ssid_len)
break;
}
/* not a wildcard scan, so cannot enable passive 6 GHz scan */
if (i == params->n_ssids) {
IWL_DEBUG_SCAN(mld,
"6GHz passive scan: no wildcard SSID\n");
return;
}
if (!sband || !sband->n_channels) {
IWL_DEBUG_SCAN(mld,
"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 6 GHz channels are disabled, so no need for 6 GHz
* passive scan
*/
if (n_disabled != sband->n_channels) {
IWL_DEBUG_SCAN(mld,
"6GHz passive scan: 6GHz channels enabled\n");
return;
}
/* all conditions to enable 6 GHz passive scan are satisfied */
IWL_DEBUG_SCAN(mld, "6GHz passive scan: can be enabled\n");
params->enable_6ghz_passive = true;
}
static void
iwl_mld_scan_set_link_id(struct iwl_mld *mld, struct ieee80211_vif *vif,
struct iwl_mld_scan_params *params,
s8 tsf_report_link_id,
enum iwl_mld_scan_status scan_status)
{
struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
struct iwl_mld_link *link;
if (tsf_report_link_id < 0) {
if (vif->active_links)
tsf_report_link_id = __ffs(vif->active_links);
else
tsf_report_link_id = 0;
}
link = iwl_mld_link_dereference_check(mld_vif, tsf_report_link_id);
if (!WARN_ON(!link)) {
params->fw_link_id = link->fw_id;
/* we to store fw_link_id only for regular scan,
* and use it in scan complete notif
*/
if (scan_status == IWL_MLD_SCAN_REGULAR)
mld->scan.fw_link_id = link->fw_id;
} else {
mld->scan.fw_link_id = IWL_MLD_INVALID_FW_ID;
params->fw_link_id = IWL_MLD_INVALID_FW_ID;
}
}
static int
_iwl_mld_single_scan_start(struct iwl_mld *mld, struct ieee80211_vif *vif,
struct cfg80211_scan_request *req,
struct ieee80211_scan_ies *ies,
enum iwl_mld_scan_status scan_status)
{
struct iwl_host_cmd hcmd = {
.id = WIDE_ID(LONG_GROUP, SCAN_REQ_UMAC),
.len = { mld->scan.cmd_size, },
.data = { mld->scan.cmd, },
.dataflags = { IWL_HCMD_DFL_NOCOPY, },
};
struct iwl_mld_scan_iter_data scan_iter_data = {
.current_vif = vif,
};
struct cfg80211_sched_scan_plan scan_plan = {.iterations = 1};
struct iwl_mld_scan_params params = {};
int ret, uid;
/* we should have failed registration if scan_cmd was NULL */
if (WARN_ON(!mld->scan.cmd))
return -ENOMEM;
if (!iwl_mld_scan_fits(mld, req->n_ssids, ies, req->n_channels))
return -ENOBUFS;
ieee80211_iterate_active_interfaces_mtx(mld->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mld_scan_iterator,
&scan_iter_data);
params.type = iwl_mld_get_scan_type(mld, vif, &scan_iter_data);
params.n_ssids = req->n_ssids;
params.flags = req->flags;
params.n_channels = req->n_channels;
params.delay = 0;
params.ssids = req->ssids;
params.channels = req->channels;
params.mac_addr = req->mac_addr;
params.mac_addr_mask = req->mac_addr_mask;
params.no_cck = req->no_cck;
params.pass_all = true;
params.n_match_sets = 0;
params.match_sets = NULL;
params.scan_plans = &scan_plan;
params.n_scan_plans = 1;
params.n_6ghz_params = req->n_6ghz_params;
params.scan_6ghz_params = req->scan_6ghz_params;
params.scan_6ghz = req->scan_6ghz;
ether_addr_copy(params.bssid, req->bssid);
/* TODO: CDB - per-band flag */
params.respect_p2p_go =
iwl_mld_get_respect_p2p_go(mld, vif,
scan_iter_data.global_low_latency);
if (req->duration)
params.iter_notif = true;
iwl_mld_scan_set_link_id(mld, vif, &params, req->tsf_report_link_id,
scan_status);
iwl_mld_scan_build_probe_req(mld, vif, ies, &params);
iwl_mld_scan_6ghz_passive_scan(mld, &params, vif);
uid = iwl_mld_scan_build_cmd(mld, vif, &params, scan_status,
scan_iter_data.global_low_latency);
if (uid < 0)
return uid;
ret = iwl_mld_send_cmd(mld, &hcmd);
if (ret) {
IWL_ERR(mld, "Scan failed! ret %d\n", ret);
return ret;
}
IWL_DEBUG_SCAN(mld, "Scan request send success: status=%u, uid=%u\n",
scan_status, uid);
mld->scan.uid_status[uid] = scan_status;
mld->scan.status |= scan_status;
if (params.enable_6ghz_passive)
mld->scan.last_6ghz_passive_jiffies = jiffies;
return 0;
}
static int
iwl_mld_scan_send_abort_cmd_status(struct iwl_mld *mld, int uid, u32 *status)
{
struct iwl_umac_scan_abort abort_cmd = {
.uid = cpu_to_le32(uid),
};
struct iwl_host_cmd cmd = {
.id = WIDE_ID(LONG_GROUP, SCAN_ABORT_UMAC),
.flags = CMD_WANT_SKB,
.data = { &abort_cmd },
.len[0] = sizeof(abort_cmd),
};
struct iwl_rx_packet *pkt;
struct iwl_cmd_response *resp;
u32 resp_len;
int ret;
ret = iwl_mld_send_cmd(mld, &cmd);
if (ret)
return ret;
pkt = cmd.resp_pkt;
resp_len = iwl_rx_packet_payload_len(pkt);
if (IWL_FW_CHECK(mld, resp_len != sizeof(*resp),
"Scan Abort: unexpected response length %d\n",
resp_len)) {
ret = -EIO;
goto out;
}
resp = (void *)pkt->data;
*status = le32_to_cpu(resp->status);
out:
iwl_free_resp(&cmd);
return ret;
}
static int
iwl_mld_scan_abort(struct iwl_mld *mld, int type, int uid, bool *wait)
{
enum iwl_umac_scan_abort_status status;
int ret;
*wait = true;
IWL_DEBUG_SCAN(mld, "Sending scan abort, uid %u\n", uid);
ret = iwl_mld_scan_send_abort_cmd_status(mld, uid, &status);
IWL_DEBUG_SCAN(mld, "Scan abort: ret=%d status=%u\n", ret, status);
/* We don't need to wait to scan complete in the following cases:
* 1. Driver failed to send the scan abort cmd.
* 2. The FW is no longer familiar with the scan that needs to be
* stopped. It is expected that the scan complete notification was
* already received but not yet processed.
*
* In both cases the flow should continue similar to the case that the
* scan was really aborted.
*/
if (ret || status == IWL_UMAC_SCAN_ABORT_STATUS_NOT_FOUND)
*wait = false;
return ret;
}
static int
iwl_mld_scan_stop_wait(struct iwl_mld *mld, int type, int uid)
{
struct iwl_notification_wait wait_scan_done;
static const u16 scan_comp_notif[] = { SCAN_COMPLETE_UMAC };
bool wait = true;
int ret;
iwl_init_notification_wait(&mld->notif_wait, &wait_scan_done,
scan_comp_notif,
ARRAY_SIZE(scan_comp_notif),
NULL, NULL);
IWL_DEBUG_SCAN(mld, "Preparing to stop scan, type=%x\n", type);
ret = iwl_mld_scan_abort(mld, type, uid, &wait);
if (ret) {
IWL_DEBUG_SCAN(mld, "couldn't stop scan type=%d\n", type);
goto return_no_wait;
}
if (!wait) {
IWL_DEBUG_SCAN(mld, "no need to wait for scan type=%d\n", type);
goto return_no_wait;
}
return iwl_wait_notification(&mld->notif_wait, &wait_scan_done, HZ);
return_no_wait:
iwl_remove_notification(&mld->notif_wait, &wait_scan_done);
return ret;
}
int iwl_mld_sched_scan_start(struct iwl_mld *mld,
struct ieee80211_vif *vif,
struct cfg80211_sched_scan_request *req,
struct ieee80211_scan_ies *ies,
int type)
{
struct iwl_host_cmd hcmd = {
.id = WIDE_ID(LONG_GROUP, SCAN_REQ_UMAC),
.len = { mld->scan.cmd_size, },
.data = { mld->scan.cmd, },
.dataflags = { IWL_HCMD_DFL_NOCOPY, },
};
struct iwl_mld_scan_params params = {};
struct iwl_mld_scan_iter_data scan_iter_data = {
.current_vif = vif,
};
bool non_psc_included = false;
int ret, uid;
/* we should have failed registration if scan_cmd was NULL */
if (WARN_ON(!mld->scan.cmd))
return -ENOMEM;
/* FW supports only a single periodic scan */
if (mld->scan.status & (IWL_MLD_SCAN_SCHED | IWL_MLD_SCAN_NETDETECT))
return -EBUSY;
ieee80211_iterate_active_interfaces_mtx(mld->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mld_scan_iterator,
&scan_iter_data);
params.type = iwl_mld_get_scan_type(mld, vif, &scan_iter_data);
params.flags = req->flags;
params.n_ssids = req->n_ssids;
params.ssids = req->ssids;
params.n_channels = req->n_channels;
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_mld_scan_pass_all(mld, req);
params.n_match_sets = req->n_match_sets;
params.match_sets = req->match_sets;
params.n_scan_plans = req->n_scan_plans;
params.scan_plans = req->scan_plans;
/* TODO: CDB - per-band flag */
params.respect_p2p_go =
iwl_mld_get_respect_p2p_go(mld, vif,
scan_iter_data.global_low_latency);
/* UMAC scan supports up to 16-bit delays, trim it down to 16-bits */
params.delay = req->delay > U16_MAX ? U16_MAX : req->delay;
eth_broadcast_addr(params.bssid);
ret = iwl_mld_config_sched_scan_profiles(mld, req);
if (ret)
return ret;
iwl_mld_scan_build_probe_req(mld, vif, ies, &params);
ret = iwl_mld_sched_scan_handle_non_psc_channels(&params,
&non_psc_included);
if (ret)
goto out;
if (!iwl_mld_scan_fits(mld, req->n_ssids, ies, params.n_channels)) {
ret = -ENOBUFS;
goto out;
}
uid = iwl_mld_scan_build_cmd(mld, vif, &params, type,
scan_iter_data.global_low_latency);
if (uid < 0) {
ret = uid;
goto out;
}
ret = iwl_mld_send_cmd(mld, &hcmd);
if (!ret) {
IWL_DEBUG_SCAN(mld,
"Sched scan request send success: type=%u, uid=%u\n",
type, uid);
mld->scan.uid_status[uid] = type;
mld->scan.status |= type;
} else {
IWL_ERR(mld, "Sched scan failed! ret %d\n", ret);
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_DISABLED;
}
out:
if (non_psc_included)
kfree(params.channels);
return ret;
}
int iwl_mld_scan_stop(struct iwl_mld *mld, int type, bool notify)
{
int uid, ret;
IWL_DEBUG_SCAN(mld,
"Request to stop scan: type=0x%x, status=0x%x\n",
type, mld->scan.status);
if (!(mld->scan.status & type))
return 0;
uid = iwl_mld_scan_uid_by_status(mld, type);
/* must be valid, we just checked it's running */
if (WARN_ON_ONCE(uid < 0))
return uid;
ret = iwl_mld_scan_stop_wait(mld, type, uid);
if (ret)
IWL_DEBUG_SCAN(mld, "Failed to stop scan\n");
/* 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. Also remove the handler to not notify mac80211
* erroneously after a new scan starts, for example.
*/
mld->scan.status &= ~type;
mld->scan.uid_status[uid] = IWL_MLD_SCAN_NONE;
iwl_mld_cancel_notifications_of_object(mld, IWL_MLD_OBJECT_TYPE_SCAN,
uid);
if (type == IWL_MLD_SCAN_REGULAR) {
if (notify) {
struct cfg80211_scan_info info = {
.aborted = true,
};
ieee80211_scan_completed(mld->hw, &info);
}
} else if (notify) {
ieee80211_sched_scan_stopped(mld->hw);
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_DISABLED;
}
return ret;
}
int iwl_mld_regular_scan_start(struct iwl_mld *mld, struct ieee80211_vif *vif,
struct cfg80211_scan_request *req,
struct ieee80211_scan_ies *ies)
{
/* Clear survey data when starting the first part of a regular scan */
if (req->first_part && mld->channel_survey)
memset(mld->channel_survey->channels, 0,
sizeof(mld->channel_survey->channels[0]) *
mld->channel_survey->n_channels);
if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
iwl_mld_emlsr_block_tmp_non_bss(mld);
return _iwl_mld_single_scan_start(mld, vif, req, ies,
IWL_MLD_SCAN_REGULAR);
}
static void iwl_mld_int_mlo_scan_start(struct iwl_mld *mld,
struct ieee80211_vif *vif,
struct ieee80211_channel **channels,
size_t n_channels)
{
struct cfg80211_scan_request *req __free(kfree) = NULL;
struct ieee80211_scan_ies ies = {};
size_t size;
int ret;
IWL_DEBUG_SCAN(mld, "Starting Internal MLO scan: n_channels=%zu\n",
n_channels);
size = struct_size(req, channels, n_channels);
req = kzalloc(size, GFP_KERNEL);
if (!req)
return;
/* set the requested channels */
for (int i = 0; i < n_channels; i++)
req->channels[i] = channels[i];
req->n_channels = n_channels;
/* set the rates */
for (int i = 0; i < NUM_NL80211_BANDS; i++)
if (mld->wiphy->bands[i])
req->rates[i] =
(1 << mld->wiphy->bands[i]->n_bitrates) - 1;
req->wdev = ieee80211_vif_to_wdev(vif);
req->wiphy = mld->wiphy;
req->scan_start = jiffies;
req->tsf_report_link_id = -1;
ret = _iwl_mld_single_scan_start(mld, vif, req, &ies,
IWL_MLD_SCAN_INT_MLO);
if (!ret)
mld->scan.last_mlo_scan_time = ktime_get_boottime_ns();
IWL_DEBUG_SCAN(mld, "Internal MLO scan: ret=%d\n", ret);
}
#define IWL_MLD_MLO_SCAN_BLOCKOUT_TIME 5 /* seconds */
void iwl_mld_int_mlo_scan(struct iwl_mld *mld, struct ieee80211_vif *vif)
{
struct ieee80211_channel *channels[IEEE80211_MLD_MAX_NUM_LINKS];
struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
unsigned long usable_links = ieee80211_vif_usable_links(vif);
size_t n_channels = 0;
u8 link_id;
lockdep_assert_wiphy(mld->wiphy);
if (!IWL_MLD_AUTO_EML_ENABLE || !vif->cfg.assoc ||
!ieee80211_vif_is_mld(vif) || hweight16(vif->valid_links) == 1)
return;
if (mld->scan.status & IWL_MLD_SCAN_INT_MLO) {
IWL_DEBUG_SCAN(mld, "Internal MLO scan is already running\n");
return;
}
if (mld_vif->last_link_activation_time > ktime_get_boottime_seconds() -
IWL_MLD_MLO_SCAN_BLOCKOUT_TIME) {
/* timing doesn't matter much, so use the blockout time */
wiphy_delayed_work_queue(mld->wiphy,
&mld_vif->mlo_scan_start_wk,
IWL_MLD_MLO_SCAN_BLOCKOUT_TIME);
return;
}
for_each_set_bit(link_id, &usable_links, IEEE80211_MLD_MAX_NUM_LINKS) {
struct ieee80211_bss_conf *link_conf =
link_conf_dereference_check(vif, link_id);
if (WARN_ON_ONCE(!link_conf))
continue;
channels[n_channels++] = link_conf->chanreq.oper.chan;
}
if (!n_channels)
return;
iwl_mld_int_mlo_scan_start(mld, vif, channels, n_channels);
}
void iwl_mld_handle_scan_iter_complete_notif(struct iwl_mld *mld,
struct iwl_rx_packet *pkt)
{
struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
u32 uid = __le32_to_cpu(notif->uid);
if (IWL_FW_CHECK(mld, uid >= ARRAY_SIZE(mld->scan.uid_status),
"FW reports out-of-range scan UID %d\n", uid))
return;
if (mld->scan.uid_status[uid] == IWL_MLD_SCAN_REGULAR)
mld->scan.start_tsf = le64_to_cpu(notif->start_tsf);
IWL_DEBUG_SCAN(mld,
"UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
notif->status, notif->scanned_channels);
if (mld->scan.pass_all_sched_res == SCHED_SCAN_PASS_ALL_STATE_FOUND) {
IWL_DEBUG_SCAN(mld, "Pass all scheduled scan results found\n");
ieee80211_sched_scan_results(mld->hw);
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_ENABLED;
}
IWL_DEBUG_SCAN(mld,
"UMAC Scan iteration complete: scan started at %llu (TSF)\n",
le64_to_cpu(notif->start_tsf));
}
void iwl_mld_handle_match_found_notif(struct iwl_mld *mld,
struct iwl_rx_packet *pkt)
{
IWL_DEBUG_SCAN(mld, "Scheduled scan results\n");
ieee80211_sched_scan_results(mld->hw);
}
void iwl_mld_handle_scan_complete_notif(struct iwl_mld *mld,
struct iwl_rx_packet *pkt)
{
struct iwl_umac_scan_complete *notif = (void *)pkt->data;
bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
u32 uid = __le32_to_cpu(notif->uid);
if (IWL_FW_CHECK(mld, uid >= ARRAY_SIZE(mld->scan.uid_status),
"FW reports out-of-range scan UID %d\n", uid))
return;
IWL_DEBUG_SCAN(mld,
"Scan completed: uid=%u type=%u, status=%s, EBS=%s\n",
uid, mld->scan.uid_status[uid],
notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
"completed" : "aborted",
iwl_mld_scan_ebs_status_str(notif->ebs_status));
IWL_DEBUG_SCAN(mld, "Scan completed: scan_status=0x%x\n",
mld->scan.status);
IWL_DEBUG_SCAN(mld,
"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 (IWL_FW_CHECK(mld, !(mld->scan.uid_status[uid] & mld->scan.status),
"FW reports scan UID %d we didn't trigger\n", uid))
return;
/* if the scan is already stopping, we don't need to notify mac80211 */
if (mld->scan.uid_status[uid] == IWL_MLD_SCAN_REGULAR) {
struct cfg80211_scan_info info = {
.aborted = aborted,
.scan_start_tsf = mld->scan.start_tsf,
};
int fw_link_id = mld->scan.fw_link_id;
struct ieee80211_bss_conf *link_conf = NULL;
if (fw_link_id != IWL_MLD_INVALID_FW_ID)
link_conf =
wiphy_dereference(mld->wiphy,
mld->fw_id_to_bss_conf[fw_link_id]);
/* It is possible that by the time the scan is complete the
* link was already removed and is not valid.
*/
if (link_conf)
ether_addr_copy(info.tsf_bssid, link_conf->bssid);
else
IWL_DEBUG_SCAN(mld, "Scan link is no longer valid\n");
ieee80211_scan_completed(mld->hw, &info);
/* Scan is over, we can check again the tpt counters */
iwl_mld_stop_ignoring_tpt_updates(mld);
} else if (mld->scan.uid_status[uid] == IWL_MLD_SCAN_SCHED) {
ieee80211_sched_scan_stopped(mld->hw);
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_DISABLED;
} else if (mld->scan.uid_status[uid] == IWL_MLD_SCAN_INT_MLO) {
IWL_DEBUG_SCAN(mld, "Internal MLO scan completed\n");
/*
* We limit link selection to internal MLO scans as otherwise
* we do not know whether all channels were covered.
*/
iwl_mld_select_links(mld);
}
mld->scan.status &= ~mld->scan.uid_status[uid];
IWL_DEBUG_SCAN(mld, "Scan completed: after update: scan_status=0x%x\n",
mld->scan.status);
mld->scan.uid_status[uid] = IWL_MLD_SCAN_NONE;
if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
mld->scan.last_ebs_failed = true;
}
/* This function is used in nic restart flow, to inform mac80211 about scans
* that were aborted by restart flow or by an assert.
*/
void iwl_mld_report_scan_aborted(struct iwl_mld *mld)
{
int uid;
uid = iwl_mld_scan_uid_by_status(mld, IWL_MLD_SCAN_REGULAR);
if (uid >= 0) {
struct cfg80211_scan_info info = {
.aborted = true,
};
ieee80211_scan_completed(mld->hw, &info);
mld->scan.uid_status[uid] = IWL_MLD_SCAN_NONE;
}
uid = iwl_mld_scan_uid_by_status(mld, IWL_MLD_SCAN_SCHED);
if (uid >= 0) {
mld->scan.pass_all_sched_res = SCHED_SCAN_PASS_ALL_STATE_DISABLED;
mld->scan.uid_status[uid] = IWL_MLD_SCAN_NONE;
/* sched scan will be restarted by mac80211 in reconfig.
* report to mac80211 that sched scan stopped only if we won't
* restart the firmware.
*/
if (!iwlwifi_mod_params.fw_restart)
ieee80211_sched_scan_stopped(mld->hw);
}
uid = iwl_mld_scan_uid_by_status(mld, IWL_MLD_SCAN_INT_MLO);
if (uid >= 0) {
IWL_DEBUG_SCAN(mld, "Internal MLO scan aborted\n");
mld->scan.uid_status[uid] = IWL_MLD_SCAN_NONE;
}
BUILD_BUG_ON(IWL_MLD_SCAN_NONE != 0);
memset(mld->scan.uid_status, 0, sizeof(mld->scan.uid_status));
}
int iwl_mld_alloc_scan_cmd(struct iwl_mld *mld)
{
u8 scan_cmd_ver = iwl_fw_lookup_cmd_ver(mld->fw, SCAN_REQ_UMAC,
IWL_FW_CMD_VER_UNKNOWN);
size_t scan_cmd_size;
if (scan_cmd_ver == 17) {
scan_cmd_size = sizeof(struct iwl_scan_req_umac_v17);
} else {
IWL_ERR(mld, "Unexpected scan cmd version %d\n", scan_cmd_ver);
return -EINVAL;
}
mld->scan.cmd = kmalloc(scan_cmd_size, GFP_KERNEL);
if (!mld->scan.cmd)
return -ENOMEM;
mld->scan.cmd_size = scan_cmd_size;
return 0;
}
static int iwl_mld_chanidx_from_phy(struct iwl_mld *mld,
enum nl80211_band band,
u16 phy_chan_num)
{
struct ieee80211_supported_band *sband = mld->wiphy->bands[band];
if (WARN_ON_ONCE(!sband))
return -EINVAL;
for (int 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;
}
void iwl_mld_handle_channel_survey_notif(struct iwl_mld *mld,
struct iwl_rx_packet *pkt)
{
const struct iwl_umac_scan_channel_survey_notif *notif =
(void *)pkt->data;
struct iwl_mld_survey_channel *info;
enum nl80211_band band;
int chan_idx;
if (!mld->channel_survey) {
size_t n_channels = 0;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!mld->wiphy->bands[band])
continue;
n_channels += mld->wiphy->bands[band]->n_channels;
}
mld->channel_survey = kzalloc(struct_size(mld->channel_survey,
channels, n_channels),
GFP_KERNEL);
if (!mld->channel_survey)
return;
mld->channel_survey->n_channels = n_channels;
n_channels = 0;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
if (!mld->wiphy->bands[band])
continue;
mld->channel_survey->bands[band] =
&mld->channel_survey->channels[n_channels];
n_channels += mld->wiphy->bands[band]->n_channels;
}
}
band = iwl_mld_phy_band_to_nl80211(le32_to_cpu(notif->band));
chan_idx = iwl_mld_chanidx_from_phy(mld, band,
le32_to_cpu(notif->channel));
if (WARN_ON_ONCE(chan_idx < 0))
return;
IWL_DEBUG_SCAN(mld, "channel survey received for freq %d\n",
mld->wiphy->bands[band]->channels[chan_idx].center_freq);
info = &mld->channel_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->noise =
iwl_average_neg_dbm(notif->noise, ARRAY_SIZE(notif->noise));
}
int iwl_mld_mac80211_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
int curr_idx = 0;
if (!mld->channel_survey)
return -ENOENT;
/* Iterate bands/channels to find the requested index.
* Logically this returns the entry with index "idx" from a flattened
* survey result array that only contains channels with information.
* The current index into this flattened array is tracked in curr_idx.
*/
for (enum nl80211_band band = 0; band < NUM_NL80211_BANDS; band++) {
struct ieee80211_supported_band *sband =
mld->wiphy->bands[band];
if (!sband)
continue;
for (int per_band_idx = 0;
per_band_idx < sband->n_channels;
per_band_idx++) {
struct iwl_mld_survey_channel *info =
&mld->channel_survey->bands[band][per_band_idx];
/* Skip entry entirely, it was not reported/scanned,
* do not increase curr_idx for this entry.
*/
if (!info->time)
continue;
/* Search did not reach the requested entry yet,
* increment curr_idx and continue.
*/
if (idx != curr_idx) {
curr_idx++;
continue;
}
/* Found (the next) channel to report */
survey->channel = &sband->channels[per_band_idx];
survey->filled = SURVEY_INFO_TIME |
SURVEY_INFO_TIME_BUSY;
survey->time = info->time;
survey->time_busy = info->time_busy;
survey->noise = info->noise;
if (survey->noise < 0)
survey->filled |= SURVEY_INFO_NOISE_DBM;
return 0;
}
}
return -ENOENT;
}
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