this file handles ap related logic
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mld/ap.c | 344 ++++++++++++++++++++
drivers/net/wireless/intel/iwlwifi/mld/ap.h | 46 +++
2 files changed, 390 insertions(+)
create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/ap.c
create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/ap.h
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/ap.c b/drivers/net/wireless/intel/iwlwifi/mld/ap.c
new file mode 100644
index 000000000000..571eabd0b511
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mld/ap.c
@@ -0,0 +1,344 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2024 Intel Corporation
+ */
+#include <linux/crc32.h>
+
+#include <net/mac80211.h>
+
+#include "ap.h"
+#include "hcmd.h"
+#include "tx.h"
+#include "power.h"
+#include "key.h"
+#include "iwl-utils.h"
+
+#include "fw/api/sta.h"
+
+void iwl_mld_set_tim_idx(struct iwl_mld *mld, __le32 *tim_index,
+ u8 *beacon, u32 frame_size)
+{
+ u32 tim_idx;
+ struct ieee80211_mgmt *mgmt = (void *)beacon;
+
+ /* The index is relative to frame start but we start looking at the
+ * variable-length part of the beacon.
+ */
+ tim_idx = mgmt->u.beacon.variable - beacon;
+
+ /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
+ while ((tim_idx < (frame_size - 2)) &&
+ (beacon[tim_idx] != WLAN_EID_TIM))
+ tim_idx += beacon[tim_idx + 1] + 2;
+
+ /* If TIM field was found, set variables */
+ if ((tim_idx < (frame_size - 1)) && beacon[tim_idx] == WLAN_EID_TIM)
+ *tim_index = cpu_to_le32(tim_idx);
+ else
+ IWL_WARN(mld, "Unable to find TIM Element in beacon\n");
+}
+
+u8 iwl_mld_get_rate_flags(struct iwl_mld *mld,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link,
+ enum nl80211_band band)
+{
+ u32 legacy = link->beacon_tx_rate.control[band].legacy;
+ u32 rate_idx, rate_flags = 0, fw_rate;
+
+ /* if beacon rate was configured try using it */
+ if (hweight32(legacy) == 1) {
+ u32 rate = ffs(legacy) - 1;
+ struct ieee80211_supported_band *sband =
+ mld->hw->wiphy->bands[band];
+
+ rate_idx = sband->bitrates[rate].hw_value;
+ } else {
+ rate_idx = iwl_mld_get_lowest_rate(mld, info, vif);
+ }
+
+ if (rate_idx <= IWL_LAST_CCK_RATE)
+ rate_flags = IWL_MAC_BEACON_CCK;
+
+ /* Legacy rates are indexed as follows:
+ * 0 - 3 for CCK and 0 - 7 for OFDM.
+ */
+ fw_rate = (rate_idx >= IWL_FIRST_OFDM_RATE ?
+ rate_idx - IWL_FIRST_OFDM_RATE : rate_idx);
+
+ return fw_rate | rate_flags;
+}
+
+int iwl_mld_send_beacon_template_cmd(struct iwl_mld *mld,
+ struct sk_buff *beacon,
+ struct iwl_mac_beacon_cmd *cmd)
+{
+ struct iwl_host_cmd hcmd = {
+ .id = BEACON_TEMPLATE_CMD,
+ };
+
+ hcmd.len[0] = sizeof(*cmd);
+ hcmd.data[0] = cmd;
+
+ hcmd.len[1] = beacon->len;
+ hcmd.data[1] = beacon->data;
+ hcmd.dataflags[1] = IWL_HCMD_DFL_DUP;
+
+ return iwl_mld_send_cmd(mld, &hcmd);
+}
+
+static int iwl_mld_fill_beacon_template_cmd(struct iwl_mld *mld,
+ struct ieee80211_vif *vif,
+ struct sk_buff *beacon,
+ struct iwl_mac_beacon_cmd *cmd,
+ struct ieee80211_bss_conf *link)
+{
+ struct iwl_mld_link *mld_link = iwl_mld_link_from_mac80211(link);
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
+ struct ieee80211_chanctx_conf *ctx;
+ bool enable_fils;
+ u16 flags = 0;
+
+ lockdep_assert_wiphy(mld->wiphy);
+
+ if (WARN_ON(!mld_link))
+ return -EINVAL;
+
+ cmd->link_id = cpu_to_le32(mld_link->fw_id);
+
+ ctx = wiphy_dereference(mld->wiphy, link->chanctx_conf);
+ if (WARN_ON(!ctx || !ctx->def.chan))
+ return -EINVAL;
+
+ enable_fils = cfg80211_channel_is_psc(ctx->def.chan) ||
+ (ctx->def.chan->band == NL80211_BAND_6GHZ &&
+ ctx->def.width >= NL80211_CHAN_WIDTH_80);
+
+ if (enable_fils) {
+ flags |= IWL_MAC_BEACON_FILS;
+ cmd->short_ssid = cpu_to_le32(~crc32_le(~0, vif->cfg.ssid,
+ vif->cfg.ssid_len));
+ }
+
+ cmd->byte_cnt = cpu_to_le16((u16)beacon->len);
+
+ flags |= iwl_mld_get_rate_flags(mld, info, vif, link,
+ ctx->def.chan->band);
+
+ cmd->flags = cpu_to_le16(flags);
+
+ if (vif->type == NL80211_IFTYPE_AP) {
+ iwl_mld_set_tim_idx(mld, &cmd->tim_idx,
+ beacon->data, beacon->len);
+
+ cmd->btwt_offset =
+ cpu_to_le32(iwl_find_ie_offset(beacon->data,
+ WLAN_EID_S1G_TWT,
+ beacon->len));
+ }
+
+ cmd->csa_offset =
+ cpu_to_le32(iwl_find_ie_offset(beacon->data,
+ WLAN_EID_CHANNEL_SWITCH,
+ beacon->len));
+ cmd->ecsa_offset =
+ cpu_to_le32(iwl_find_ie_offset(beacon->data,
+ WLAN_EID_EXT_CHANSWITCH_ANN,
+ beacon->len));
+
+ return 0;
+}
+
+/* The beacon template for the AP/GO/IBSS has changed and needs update */
+int iwl_mld_update_beacon_template(struct iwl_mld *mld,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link_conf)
+{
+ struct iwl_mac_beacon_cmd cmd = {};
+ struct sk_buff *beacon;
+ int ret;
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+#endif
+
+ WARN_ON(vif->type != NL80211_IFTYPE_AP &&
+ vif->type != NL80211_IFTYPE_ADHOC);
+
+ if (IWL_MLD_NON_TRANSMITTING_AP)
+ return 0;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ if (mld_vif->beacon_inject_active) {
+ IWL_DEBUG_INFO(mld,
+ "Can't update template, beacon injection's active\n");
+ return -EBUSY;
+ }
+
+#endif
+ beacon = ieee80211_beacon_get_template(mld->hw, vif, NULL,
+ link_conf->link_id);
+ if (!beacon)
+ return -ENOMEM;
+
+ ret = iwl_mld_fill_beacon_template_cmd(mld, vif, beacon, &cmd,
+ link_conf);
+
+ if (!ret)
+ ret = iwl_mld_send_beacon_template_cmd(mld, beacon, &cmd);
+
+ dev_kfree_skb(beacon);
+
+ return ret;
+}
+
+void iwl_mld_free_ap_early_key(struct iwl_mld *mld,
+ struct ieee80211_key_conf *key,
+ struct iwl_mld_vif *mld_vif)
+{
+ struct iwl_mld_link *link;
+
+ if (WARN_ON(key->link_id < 0))
+ return;
+
+ link = iwl_mld_link_dereference_check(mld_vif, key->link_id);
+ if (WARN_ON(!link))
+ return;
+
+ for (int i = 0; i < ARRAY_SIZE(link->ap_early_keys); i++) {
+ if (link->ap_early_keys[i] != key)
+ continue;
+ /* Those weren't sent to FW, so should be marked as INVALID */
+ if (WARN_ON(key->hw_key_idx != STA_KEY_IDX_INVALID))
+ key->hw_key_idx = STA_KEY_IDX_INVALID;
+ link->ap_early_keys[i] = NULL;
+ }
+}
+
+int iwl_mld_store_ap_early_key(struct iwl_mld *mld,
+ struct ieee80211_key_conf *key,
+ struct iwl_mld_vif *mld_vif)
+{
+ struct iwl_mld_link *link;
+
+ if (WARN_ON(key->link_id < 0))
+ return -EINVAL;
+
+ link = iwl_mld_link_dereference_check(mld_vif, key->link_id);
+ if (WARN_ON(!link))
+ return -EINVAL;
+
+ for (int i = 0; i < ARRAY_SIZE(link->ap_early_keys); i++) {
+ if (!link->ap_early_keys[i]) {
+ link->ap_early_keys[i] = key;
+ return 0;
+ }
+ }
+
+ return -ENOSPC;
+}
+
+static int iwl_mld_send_ap_early_keys(struct iwl_mld *mld,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link)
+{
+ struct iwl_mld_link *mld_link = iwl_mld_link_from_mac80211(link);
+ int ret = 0;
+
+ if (WARN_ON(!link))
+ return -EINVAL;
+
+ for (int i = 0; i < ARRAY_SIZE(mld_link->ap_early_keys); i++) {
+ struct ieee80211_key_conf *key = mld_link->ap_early_keys[i];
+
+ if (!key)
+ continue;
+
+ mld_link->ap_early_keys[i] = NULL;
+
+ ret = iwl_mld_add_key(mld, vif, NULL, key);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+
+int iwl_mld_start_ap_ibss(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link)
+{
+ struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
+ struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+ int ret;
+
+ if (vif->type == NL80211_IFTYPE_AP)
+ iwl_mld_send_ap_tx_power_constraint_cmd(mld, vif, link);
+
+ ret = iwl_mld_update_beacon_template(mld, vif, link);
+ if (ret)
+ return ret;
+
+ /* the link should be already activated when assigning chan context,
+ * and LINK_CONTEXT_MODIFY_EHT_PARAMS is deprecated
+ */
+ ret = iwl_mld_change_link_in_fw(mld, link,
+ LINK_CONTEXT_MODIFY_ALL &
+ ~(LINK_CONTEXT_MODIFY_ACTIVE |
+ LINK_CONTEXT_MODIFY_EHT_PARAMS));
+ if (ret)
+ return ret;
+
+ ret = iwl_mld_add_mcast_sta(mld, vif, link);
+ if (ret)
+ return ret;
+
+ ret = iwl_mld_add_bcast_sta(mld, vif, link);
+ if (ret)
+ goto rm_mcast;
+
+ /* Those keys were configured by the upper layers before starting the
+ * AP. Now that it is started and the bcast and mcast sta were added to
+ * the FW, we can add the keys too.
+ */
+ ret = iwl_mld_send_ap_early_keys(mld, vif, link);
+ if (ret)
+ goto rm_bcast;
+
+ if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP)
+ iwl_mld_vif_update_low_latency(mld, vif, true,
+ LOW_LATENCY_VIF_TYPE);
+
+ mld_vif->ap_ibss_active = true;
+
+ if (vif->p2p && mld->p2p_device_vif)
+ return iwl_mld_mac_fw_action(mld, mld->p2p_device_vif,
+ FW_CTXT_ACTION_MODIFY);
+
+ return 0;
+rm_bcast:
+ iwl_mld_remove_bcast_sta(mld, vif, link);
+rm_mcast:
+ iwl_mld_remove_mcast_sta(mld, vif, link);
+ return ret;
+}
+
+void iwl_mld_stop_ap_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link)
+{
+ struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
+ struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+
+ mld_vif->ap_ibss_active = false;
+
+ if (vif->p2p && mld->p2p_device_vif)
+ iwl_mld_mac_fw_action(mld, mld->p2p_device_vif,
+ FW_CTXT_ACTION_MODIFY);
+
+ if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP)
+ iwl_mld_vif_update_low_latency(mld, vif, false,
+ LOW_LATENCY_VIF_TYPE);
+
+ iwl_mld_remove_bcast_sta(mld, vif, link);
+
+ iwl_mld_remove_mcast_sta(mld, vif, link);
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/ap.h b/drivers/net/wireless/intel/iwlwifi/mld/ap.h
new file mode 100644
index 000000000000..7d904cef4018
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mld/ap.h
@@ -0,0 +1,46 @@
+
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2024 Intel Corporation
+ */
+#ifndef __iwl_ap_h__
+#define __iwl_ap_h__
+
+#include "mld.h"
+#include "iface.h"
+
+#include "fw/api/tx.h"
+
+int iwl_mld_update_beacon_template(struct iwl_mld *mld,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link_conf);
+
+int iwl_mld_start_ap_ibss(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link);
+
+void iwl_mld_stop_ap_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link);
+
+int iwl_mld_store_ap_early_key(struct iwl_mld *mld,
+ struct ieee80211_key_conf *key,
+ struct iwl_mld_vif *mld_vif);
+
+void iwl_mld_free_ap_early_key(struct iwl_mld *mld,
+ struct ieee80211_key_conf *key,
+ struct iwl_mld_vif *mld_vif);
+
+u8 iwl_mld_get_rate_flags(struct iwl_mld *mld,
+ struct ieee80211_tx_info *info,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *link,
+ enum nl80211_band band);
+
+void iwl_mld_set_tim_idx(struct iwl_mld *mld, __le32 *tim_index,
+ u8 *beacon, u32 frame_size);
+
+int iwl_mld_send_beacon_template_cmd(struct iwl_mld *mld,
+ struct sk_buff *beacon,
+ struct iwl_mac_beacon_cmd *cmd);
+
+#endif /* __iwl_ap_h__ */
--
2.34.1
