1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/roc.c b/drivers/net/wireless/intel/iwlwifi/mld/roc.c
new file mode 100644
index 000000000000..b87faca23ceb
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mld/roc.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2024 - 2025 Intel Corporation
+ */
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+
+#include "mld.h"
+#include "roc.h"
+#include "hcmd.h"
+#include "iface.h"
+#include "sta.h"
+#include "mlo.h"
+
+#include "fw/api/context.h"
+#include "fw/api/time-event.h"
+
+#define AUX_ROC_MAX_DELAY MSEC_TO_TU(200)
+
+static void
+iwl_mld_vif_iter_emlsr_block_roc(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+	struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+	int *result = data;
+	int ret;
+
+	ret = iwl_mld_block_emlsr_sync(mld_vif->mld, vif,
+				       IWL_MLD_EMLSR_BLOCKED_ROC,
+				       iwl_mld_get_primary_link(vif));
+	if (ret)
+		*result = ret;
+}
+
+int iwl_mld_start_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		      struct ieee80211_channel *channel, int duration,
+		      enum ieee80211_roc_type type)
+{
+	struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
+	struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+	struct iwl_mld_int_sta *aux_sta;
+	struct iwl_roc_req cmd = {
+		.action = cpu_to_le32(FW_CTXT_ACTION_ADD),
+	};
+	u8 ver = iwl_fw_lookup_cmd_ver(mld->fw,
+				       WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0);
+	u16 cmd_len = ver < 6 ? sizeof(struct iwl_roc_req_v5) : sizeof(cmd);
+	enum iwl_roc_activity activity;
+	int ret = 0;
+
+	lockdep_assert_wiphy(mld->wiphy);
+
+	ieee80211_iterate_active_interfaces_mtx(mld->hw,
+						IEEE80211_IFACE_ITER_NORMAL,
+						iwl_mld_vif_iter_emlsr_block_roc,
+						&ret);
+	if (ret)
+		return ret;
+
+	/* TODO: task=Hotspot 2.0 */
+	if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
+		IWL_ERR(mld, "NOT SUPPORTED: ROC on vif->type %d\n",
+			vif->type);
+
+		return -EOPNOTSUPP;
+	}
+
+	switch (type) {
+	case IEEE80211_ROC_TYPE_NORMAL:
+		activity = ROC_ACTIVITY_P2P_DISC;
+		break;
+	case IEEE80211_ROC_TYPE_MGMT_TX:
+		activity = ROC_ACTIVITY_P2P_NEG;
+		break;
+	default:
+		WARN_ONCE(1, "Got an invalid P2P ROC type\n");
+		return -EINVAL;
+	}
+
+	if (WARN_ON(mld_vif->roc_activity != ROC_NUM_ACTIVITIES))
+		return -EBUSY;
+
+	/* No MLO on P2P device */
+	aux_sta = &mld_vif->deflink.aux_sta;
+
+	ret = iwl_mld_add_aux_sta(mld, aux_sta);
+	if (ret)
+		return ret;
+
+	cmd.activity = cpu_to_le32(activity);
+	cmd.sta_id = cpu_to_le32(aux_sta->sta_id);
+	cmd.channel_info.channel = cpu_to_le32(channel->hw_value);
+	cmd.channel_info.band = iwl_mld_nl80211_band_to_fw(channel->band);
+	cmd.channel_info.width = IWL_PHY_CHANNEL_MODE20;
+	/* TODO: task=Hotspot 2.0, revisit those parameters when we add an ROC
+	 * on the BSS vif
+	 */
+	cmd.max_delay = cpu_to_le32(AUX_ROC_MAX_DELAY);
+	cmd.duration = cpu_to_le32(MSEC_TO_TU(duration));
+
+	memcpy(cmd.node_addr, vif->addr, ETH_ALEN);
+
+	ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(MAC_CONF_GROUP, ROC_CMD),
+				   &cmd, cmd_len);
+	if (ret) {
+		IWL_ERR(mld, "Couldn't send the ROC_CMD\n");
+		return ret;
+	}
+	mld_vif->roc_activity = activity;
+
+	return 0;
+}
+
+static void
+iwl_mld_vif_iter_emlsr_unblock_roc(void *data, u8 *mac,
+				   struct ieee80211_vif *vif)
+{
+	struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+
+	iwl_mld_unblock_emlsr(mld_vif->mld, vif, IWL_MLD_EMLSR_BLOCKED_ROC);
+}
+
+static void iwl_mld_destroy_roc(struct iwl_mld *mld,
+				struct ieee80211_vif *vif,
+				struct iwl_mld_vif *mld_vif)
+{
+	mld_vif->roc_activity = ROC_NUM_ACTIVITIES;
+
+	ieee80211_iterate_active_interfaces_mtx(mld->hw,
+						IEEE80211_IFACE_ITER_NORMAL,
+						iwl_mld_vif_iter_emlsr_unblock_roc,
+						NULL);
+
+	/* wait until every tx has seen that roc_activity has been reset */
+	synchronize_net();
+	/* from here, no new tx will be added
+	 * we can flush the Tx on the queues
+	 */
+
+	iwl_mld_flush_link_sta_txqs(mld, mld_vif->deflink.aux_sta.sta_id);
+
+	iwl_mld_remove_aux_sta(mld, vif, &vif->bss_conf);
+}
+
+int iwl_mld_cancel_roc(struct ieee80211_hw *hw,
+		       struct ieee80211_vif *vif)
+{
+	struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
+	struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif);
+	struct iwl_roc_req cmd = {
+		.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
+	};
+	u8 ver = iwl_fw_lookup_cmd_ver(mld->fw,
+				       WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0);
+	u16 cmd_len = ver < 6 ? sizeof(struct iwl_roc_req_v5) : sizeof(cmd);
+	int ret;
+
+	lockdep_assert_wiphy(mld->wiphy);
+
+	/* TODO: task=Hotspot 2.0 */
+	if (WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE))
+		return -EOPNOTSUPP;
+
+	/* No roc activity running it's probably already done */
+	if (mld_vif->roc_activity == ROC_NUM_ACTIVITIES)
+		return 0;
+
+	cmd.activity = cpu_to_le32(mld_vif->roc_activity);
+
+	ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(MAC_CONF_GROUP, ROC_CMD),
+				   &cmd, cmd_len);
+	if (ret)
+		IWL_ERR(mld, "Couldn't send the command to cancel the ROC\n");
+
+	/* We may have raced with the firmware expiring the ROC instance at
+	 * this very moment. In that case, we can have a notification in the
+	 * async processing queue. However, none can arrive _after_ this as
+	 * ROC_CMD was sent synchronously, i.e. we waited for a response and
+	 * the firmware cannot refer to this ROC after the response. Thus,
+	 * if we just cancel the notification (if there's one) we'll be at a
+	 * clean state for any possible next ROC.
+	 */
+	iwl_mld_cancel_notifications_of_object(mld, IWL_MLD_OBJECT_TYPE_ROC,
+					       mld_vif->roc_activity);
+
+	iwl_mld_destroy_roc(mld, vif, mld_vif);
+
+	return 0;
+}
+
+void iwl_mld_handle_roc_notif(struct iwl_mld *mld,
+			      struct iwl_rx_packet *pkt)
+{
+	const struct iwl_roc_notif *notif = (void *)pkt->data;
+	u32 activity = le32_to_cpu(notif->activity);
+	/* TODO: task=Hotspot 2.0 - roc can run on BSS */
+	struct ieee80211_vif *vif = mld->p2p_device_vif;
+	struct iwl_mld_vif *mld_vif;
+
+	if (WARN_ON(!vif))
+		return;
+
+	mld_vif = iwl_mld_vif_from_mac80211(vif);
+	/* It is possible that the ROC was canceled
+	 * but the notification was already fired.
+	 */
+	if (mld_vif->roc_activity != activity)
+		return;
+
+	if (le32_to_cpu(notif->success) &&
+	    le32_to_cpu(notif->started)) {
+		/* We had a successful start */
+		ieee80211_ready_on_channel(mld->hw);
+	} else {
+		/* ROC was not successful, tell the firmware to remove it */
+		if (le32_to_cpu(notif->started))
+			iwl_mld_cancel_roc(mld->hw, vif);
+		else
+			iwl_mld_destroy_roc(mld, vif, mld_vif);
+		/* we need to let know mac80211 about end OR
+		 * an unsuccessful start
+		 */
+		ieee80211_remain_on_channel_expired(mld->hw);
+	}
+}