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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2022 - 2023 Intel Corporation
*/
#include "mvm.h"
#include "time-event.h"
static u32 iwl_mvm_get_free_fw_link_id(struct iwl_mvm *mvm,
struct iwl_mvm_vif *mvm_vif)
{
u32 link_id;
lockdep_assert_held(&mvm->mutex);
link_id = ffz(mvm->fw_link_ids_map);
/* this case can happen if there're deactivated but not removed links */
if (link_id > IWL_MVM_FW_MAX_LINK_ID)
return IWL_MVM_FW_LINK_ID_INVALID;
mvm->fw_link_ids_map |= BIT(link_id);
return link_id;
}
static void iwl_mvm_release_fw_link_id(struct iwl_mvm *mvm, u32 link_id)
{
lockdep_assert_held(&mvm->mutex);
if (!WARN_ON(link_id > IWL_MVM_FW_MAX_LINK_ID))
mvm->fw_link_ids_map &= ~BIT(link_id);
}
static int iwl_mvm_link_cmd_send(struct iwl_mvm *mvm,
struct iwl_link_config_cmd *cmd,
enum iwl_ctxt_action action)
{
int ret;
cmd->action = cpu_to_le32(action);
ret = iwl_mvm_send_cmd_pdu(mvm,
WIDE_ID(MAC_CONF_GROUP, LINK_CONFIG_CMD), 0,
sizeof(*cmd), cmd);
if (ret)
IWL_ERR(mvm, "Failed to send LINK_CONFIG_CMD (action:%d): %d\n",
action, ret);
return ret;
}
int iwl_mvm_add_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
unsigned int link_id = link_conf->link_id;
struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
struct iwl_link_config_cmd cmd = {};
struct iwl_mvm_phy_ctxt *phyctxt;
if (WARN_ON_ONCE(!link_info))
return -EINVAL;
if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) {
link_info->fw_link_id = iwl_mvm_get_free_fw_link_id(mvm,
mvmvif);
if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)
return -EINVAL;
rcu_assign_pointer(mvm->link_id_to_link_conf[link_info->fw_link_id],
link_conf);
}
/* Update SF - Disable if needed. if this fails, SF might still be on
* while many macs are bound, which is forbidden - so fail the binding.
*/
if (iwl_mvm_sf_update(mvm, vif, false))
return -EINVAL;
cmd.link_id = cpu_to_le32(link_info->fw_link_id);
cmd.mac_id = cpu_to_le32(mvmvif->id);
cmd.spec_link_id = link_conf->link_id;
/* P2P-Device already has a valid PHY context during add */
phyctxt = link_info->phy_ctxt;
if (phyctxt)
cmd.phy_id = cpu_to_le32(phyctxt->id);
else
cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID);
memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN);
if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid)
memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN);
return iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_ADD);
}
int iwl_mvm_link_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf,
u32 changes, bool active)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
unsigned int link_id = link_conf->link_id;
struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
struct iwl_mvm_phy_ctxt *phyctxt;
struct iwl_link_config_cmd cmd = {};
u32 ht_flag, flags = 0, flags_mask = 0;
int ret;
if (WARN_ON_ONCE(!link_info ||
link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID))
return -EINVAL;
if (changes & LINK_CONTEXT_MODIFY_ACTIVE) {
/* When activating a link, phy context should be valid;
* when deactivating a link, it also should be valid since
* the link was active before. So, do nothing in this case.
* Since a link is added first with FW_CTXT_INVALID, then we
* can get here in case it's removed before it was activated.
*/
if (!link_info->phy_ctxt)
return 0;
/* check there aren't too many active links */
if (!link_info->active && active) {
int i, count = 0;
/* link with phy_ctxt is active in FW */
for_each_mvm_vif_valid_link(mvmvif, i)
if (mvmvif->link[i]->phy_ctxt)
count++;
if (vif->type == NL80211_IFTYPE_AP) {
if (count > mvm->fw->ucode_capa.num_beacons)
return -EOPNOTSUPP;
/* this should be per HW or such */
} else if (count >= IWL_MVM_FW_MAX_ACTIVE_LINKS_NUM) {
return -EOPNOTSUPP;
}
}
/* Catch early if driver tries to activate or deactivate a link
* twice.
*/
WARN_ON_ONCE(active == link_info->active);
/* When deactivating a link session protection should
* be stopped
*/
if (!active && vif->type == NL80211_IFTYPE_STATION)
iwl_mvm_stop_session_protection(mvm, vif);
}
cmd.link_id = cpu_to_le32(link_info->fw_link_id);
/* The phy_id, link address and listen_lmac can be modified only until
* the link becomes active, otherwise they will be ignored.
*/
phyctxt = link_info->phy_ctxt;
if (phyctxt)
cmd.phy_id = cpu_to_le32(phyctxt->id);
else
cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID);
cmd.mac_id = cpu_to_le32(mvmvif->id);
memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN);
cmd.active = cpu_to_le32(active);
if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid)
memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN);
/* TODO: set a value to cmd.listen_lmac when system requiremens
* will define it
*/
iwl_mvm_set_fw_basic_rates(mvm, vif, link_conf,
&cmd.cck_rates, &cmd.ofdm_rates);
cmd.cck_short_preamble = cpu_to_le32(link_conf->use_short_preamble);
cmd.short_slot = cpu_to_le32(link_conf->use_short_slot);
/* The fw does not distinguish between ht and fat */
ht_flag = LINK_PROT_FLG_HT_PROT | LINK_PROT_FLG_FAT_PROT;
iwl_mvm_set_fw_protection_flags(mvm, vif, link_conf,
&cmd.protection_flags,
ht_flag, LINK_PROT_FLG_TGG_PROTECT);
iwl_mvm_set_fw_qos_params(mvm, vif, link_conf, &cmd.ac[0],
&cmd.qos_flags);
cmd.bi = cpu_to_le32(link_conf->beacon_int);
cmd.dtim_interval = cpu_to_le32(link_conf->beacon_int *
link_conf->dtim_period);
if (!link_conf->he_support || iwlwifi_mod_params.disable_11ax ||
(vif->type == NL80211_IFTYPE_STATION && !vif->cfg.assoc)) {
changes &= ~LINK_CONTEXT_MODIFY_HE_PARAMS;
goto send_cmd;
}
cmd.htc_trig_based_pkt_ext = link_conf->htc_trig_based_pkt_ext;
if (link_conf->uora_exists) {
cmd.rand_alloc_ecwmin =
link_conf->uora_ocw_range & 0x7;
cmd.rand_alloc_ecwmax =
(link_conf->uora_ocw_range >> 3) & 0x7;
}
/* TODO how to set ndp_fdbk_buff_th_exp? */
if (iwl_mvm_set_fw_mu_edca_params(mvm, mvmvif,
&cmd.trig_based_txf[0])) {
flags |= LINK_FLG_MU_EDCA_CW;
flags_mask |= LINK_FLG_MU_EDCA_CW;
}
if (link_conf->eht_puncturing && !iwlwifi_mod_params.disable_11be)
cmd.puncture_mask = cpu_to_le16(link_conf->eht_puncturing);
else
/* This flag can be set only if the MAC has eht support */
changes &= ~LINK_CONTEXT_MODIFY_EHT_PARAMS;
cmd.bss_color = link_conf->he_bss_color.color;
if (!link_conf->he_bss_color.enabled) {
flags |= LINK_FLG_BSS_COLOR_DIS;
flags_mask |= LINK_FLG_BSS_COLOR_DIS;
}
cmd.frame_time_rts_th = cpu_to_le16(link_conf->frame_time_rts_th);
/* Block 26-tone RU OFDMA transmissions */
if (link_info->he_ru_2mhz_block) {
flags |= LINK_FLG_RU_2MHZ_BLOCK;
flags_mask |= LINK_FLG_RU_2MHZ_BLOCK;
}
if (link_conf->nontransmitted) {
ether_addr_copy(cmd.ref_bssid_addr,
link_conf->transmitter_bssid);
cmd.bssid_index = link_conf->bssid_index;
}
send_cmd:
cmd.modify_mask = cpu_to_le32(changes);
cmd.flags = cpu_to_le32(flags);
cmd.flags_mask = cpu_to_le32(flags_mask);
ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_MODIFY);
if (!ret && (changes & LINK_CONTEXT_MODIFY_ACTIVE))
link_info->active = active;
return ret;
}
int iwl_mvm_remove_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
unsigned int link_id = link_conf->link_id;
struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
struct iwl_link_config_cmd cmd = {};
int ret;
if (WARN_ON(!link_info ||
link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID))
return -EINVAL;
RCU_INIT_POINTER(mvm->link_id_to_link_conf[link_info->fw_link_id],
NULL);
cmd.link_id = cpu_to_le32(link_info->fw_link_id);
iwl_mvm_release_fw_link_id(mvm, link_info->fw_link_id);
link_info->fw_link_id = IWL_MVM_FW_LINK_ID_INVALID;
ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_REMOVE);
if (!ret)
if (iwl_mvm_sf_update(mvm, vif, true))
IWL_ERR(mvm, "Failed to update SF state\n");
return ret;
}
/* link should be deactivated before removal, so in most cases we need to
* perform these two operations together
*/
int iwl_mvm_disable_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
int ret;
ret = iwl_mvm_link_changed(mvm, vif, link_conf,
LINK_CONTEXT_MODIFY_ACTIVE, false);
if (ret)
return ret;
ret = iwl_mvm_remove_link(mvm, vif, link_conf);
if (ret)
return ret;
return ret;
}
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