wifi: ath11k: store cur_regulatory_info for each radio

The regulatory info of WMI_REG_CHAN_LIST_CC_EXT_EVENTID is not saved
in ath11k now, the info should be saved in ath11k. Save the info for
each radio and support switch regulatory rules dynamically.

As mac.c will also call ath11k_reg_handle_chan_list() in next patches move the
function to reg.c.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20231218085844.2658-3-quic_bqiang@quicinc.com

drivers/net/wireless/ath/ath11k/core.h

@@ -922,6 +922,7 @@ struct ath11k_base {
 	 * This may or may not be used during the runtime
 	 */
 	struct ieee80211_regdomain *new_regd[MAX_RADIOS];
+	struct cur_regulatory_info *reg_info_store;
 
 	/* Current DFS Regulatory */
 	enum ath11k_dfs_region dfs_region;

drivers/net/wireless/ath/ath11k/reg.c

@@ -798,6 +798,159 @@ ath11k_reg_build_regd(struct ath11k_base *ab,
 	return new_regd;
 }
 
+static bool ath11k_reg_is_world_alpha(char *alpha)
+{
+	if (alpha[0] == '0' && alpha[1] == '0')
+		return true;
+
+	if (alpha[0] == 'n' && alpha[1] == 'a')
+		return true;
+
+	return false;
+}
+
+static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar)
+{
+	struct ath11k_vif *arvif;
+
+	/* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy
+	 * and one struct ieee80211_regdomain, so it could only store one group
+	 * reg rules. It means multi-interface concurrency in the same ath11k is
+	 * not support for the regdomain. So get the vdev type of the first entry
+	 * now. After concurrency support for the regdomain, this should change.
+	 */
+	arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list);
+	if (arvif)
+		return arvif->vdev_type;
+
+	return WMI_VDEV_TYPE_UNSPEC;
+}
+
+int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
+				struct cur_regulatory_info *reg_info,
+				enum ieee80211_ap_reg_power power_type)
+{
+	struct ieee80211_regdomain *regd;
+	bool intersect = false;
+	int pdev_idx;
+	struct ath11k *ar;
+	enum wmi_vdev_type vdev_type;
+
+	ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list");
+
+	if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
+		/* In case of failure to set the requested ctry,
+		 * fw retains the current regd. We print a failure info
+		 * and return from here.
+		 */
+		ath11k_warn(ab, "Failed to set the requested Country regulatory setting\n");
+		return -EINVAL;
+	}
+
+	pdev_idx = reg_info->phy_id;
+
+	/* Avoid default reg rule updates sent during FW recovery if
+	 * it is already available
+	 */
+	spin_lock(&ab->base_lock);
+	if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
+	    ab->default_regd[pdev_idx]) {
+		spin_unlock(&ab->base_lock);
+		goto retfail;
+	}
+	spin_unlock(&ab->base_lock);
+
+	if (pdev_idx >= ab->num_radios) {
+		/* Process the event for phy0 only if single_pdev_only
+		 * is true. If pdev_idx is valid but not 0, discard the
+		 * event. Otherwise, it goes to fallback. In either case
+		 * ath11k_reg_reset_info() needs to be called to avoid
+		 * memory leak issue.
+		 */
+		ath11k_reg_reset_info(reg_info);
+
+		if (ab->hw_params.single_pdev_only &&
+		    pdev_idx < ab->hw_params.num_rxmda_per_pdev)
+			return 0;
+		goto fallback;
+	}
+
+	/* Avoid multiple overwrites to default regd, during core
+	 * stop-start after mac registration.
+	 */
+	if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
+	    !memcmp((char *)ab->default_regd[pdev_idx]->alpha2,
+		    (char *)reg_info->alpha2, 2))
+		goto retfail;
+
+	/* Intersect new rules with default regd if a new country setting was
+	 * requested, i.e a default regd was already set during initialization
+	 * and the regd coming from this event has a valid country info.
+	 */
+	if (ab->default_regd[pdev_idx] &&
+	    !ath11k_reg_is_world_alpha((char *)
+		ab->default_regd[pdev_idx]->alpha2) &&
+	    !ath11k_reg_is_world_alpha((char *)reg_info->alpha2))
+		intersect = true;
+
+	ar = ab->pdevs[pdev_idx].ar;
+	vdev_type = ath11k_reg_get_ar_vdev_type(ar);
+
+	ath11k_dbg(ab, ATH11K_DBG_WMI,
+		   "wmi handle chan list power type %d vdev type %d intersect %d\n",
+		   power_type, vdev_type, intersect);
+
+	regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type);
+	if (!regd) {
+		ath11k_warn(ab, "failed to build regd from reg_info\n");
+		goto fallback;
+	}
+
+	if (power_type == IEEE80211_REG_UNSET_AP) {
+		ath11k_reg_reset_info(&ab->reg_info_store[pdev_idx]);
+		ab->reg_info_store[pdev_idx] = *reg_info;
+	}
+
+	spin_lock(&ab->base_lock);
+	if (ab->default_regd[pdev_idx]) {
+		/* The initial rules from FW after WMI Init is to build
+		 * the default regd. From then on, any rules updated for
+		 * the pdev could be due to user reg changes.
+		 * Free previously built regd before assigning the newly
+		 * generated regd to ar. NULL pointer handling will be
+		 * taken care by kfree itself.
+		 */
+		ar = ab->pdevs[pdev_idx].ar;
+		kfree(ab->new_regd[pdev_idx]);
+		ab->new_regd[pdev_idx] = regd;
+		queue_work(ab->workqueue, &ar->regd_update_work);
+	} else {
+		/* This regd would be applied during mac registration and is
+		 * held constant throughout for regd intersection purpose
+		 */
+		ab->default_regd[pdev_idx] = regd;
+	}
+	ab->dfs_region = reg_info->dfs_region;
+	spin_unlock(&ab->base_lock);
+
+	return 0;
+
+fallback:
+	/* Fallback to older reg (by sending previous country setting
+	 * again if fw has succeeded and we failed to process here.
+	 * The Regdomain should be uniform across driver and fw. Since the
+	 * FW has processed the command and sent a success status, we expect
+	 * this function to succeed as well. If it doesn't, CTRY needs to be
+	 * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent.
+	 */
+	/* TODO: This is rare, but still should also be handled */
+	WARN_ON(1);
+
+retfail:
+
+	return -EINVAL;
+}
+
 void ath11k_regd_update_work(struct work_struct *work)
 {
 	struct ath11k *ar = container_of(work, struct ath11k,
@@ -821,10 +974,36 @@ void ath11k_reg_init(struct ath11k *ar)
 	ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
 }
 
+void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info)
+{
+	int i, j;
+
+	if (!reg_info)
+		return;
+
+	kfree(reg_info->reg_rules_2ghz_ptr);
+	kfree(reg_info->reg_rules_5ghz_ptr);
+
+	for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
+		kfree(reg_info->reg_rules_6ghz_ap_ptr[i]);
+
+		for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
+			kfree(reg_info->reg_rules_6ghz_client_ptr[i][j]);
+	}
+
+	memset(reg_info, 0, sizeof(*reg_info));
+}
+
 void ath11k_reg_free(struct ath11k_base *ab)
 {
 	int i;
 
+	for (i = 0; i < ab->num_radios; i++)
+		ath11k_reg_reset_info(&ab->reg_info_store[i]);
+
+	kfree(ab->reg_info_store);
+	ab->reg_info_store = NULL;
+
 	for (i = 0; i < ab->hw_params.max_radios; i++) {
 		kfree(ab->default_regd[i]);
 		kfree(ab->new_regd[i]);

drivers/net/wireless/ath/ath11k/reg.h

@@ -30,6 +30,7 @@ enum ath11k_dfs_region {
 
 /* ATH11K Regulatory API's */
 void ath11k_reg_init(struct ath11k *ar);
+void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info);
 void ath11k_reg_free(struct ath11k_base *ab);
 void ath11k_regd_update_work(struct work_struct *work);
 struct ieee80211_regdomain *
@@ -41,4 +42,8 @@ int ath11k_regd_update(struct ath11k *ar);
 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait);
 enum wmi_reg_6ghz_ap_type
 ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type);
+int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
+				struct cur_regulatory_info *reg_info,
+				enum ieee80211_ap_reg_power power_type);
+
 #endif