wifi: rtw89: declare support for mac80211 chanctx ops by chip

Some HW features are required if we hook chanctx ops to mac80211. With it,
mac80211 would expect the HW-supported variant ops exists on some behavior,
e.g. HW scan. But, HW features may depend on chip's FW or its development.
Besides, how many chanctx can be supported also depends on chip design.
We can neither decide whether to generally support chanctx ops nor how many
chanctx can be supported.

So, support_chanctx_num is added under chip info to deal with this by chip.
For now, all chip configure support_chanctx_num as 0. We haven't really
hook chanctx ops yet. So, chip can run without mac80211 chanctx as before.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220809104952.61355-13-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/chan.c

@@ -185,10 +185,11 @@ int rtw89_chanctx_ops_add(struct rtw89_dev *rtwdev,
 {
 	struct rtw89_hal *hal = &rtwdev->hal;
 	struct rtw89_chanctx_cfg *cfg = (struct rtw89_chanctx_cfg *)ctx->drv_priv;
+	const struct rtw89_chip_info *chip = rtwdev->chip;
 	u8 idx;
 
 	idx = find_first_zero_bit(hal->entity_map, NUM_OF_RTW89_SUB_ENTITY);
-	if (idx > RTW89_SUB_ENTITY_0)
+	if (idx >= chip->support_chanctx_num)
 		return -ENOENT;
 
 	rtw89_config_entity_chandef(rtwdev, idx, &ctx->def);

drivers/net/wireless/realtek/rtw89/core.c

@@ -3208,6 +3208,53 @@ void rtw89_core_unregister(struct rtw89_dev *rtwdev)
 }
 EXPORT_SYMBOL(rtw89_core_unregister);
 
+struct rtw89_dev *rtw89_alloc_ieee80211_hw(struct device *device,
+					   u32 bus_data_size,
+					   const struct rtw89_chip_info *chip)
+{
+	struct ieee80211_hw *hw;
+	struct rtw89_dev *rtwdev;
+	struct ieee80211_ops *ops;
+	u32 driver_data_size;
+
+	ops = kmemdup(&rtw89_ops, sizeof(rtw89_ops), GFP_KERNEL);
+	if (!ops)
+		goto err;
+
+	if (chip->support_chanctx_num == 0) {
+		ops->add_chanctx = NULL;
+		ops->remove_chanctx = NULL;
+		ops->change_chanctx = NULL;
+		ops->assign_vif_chanctx = NULL;
+		ops->unassign_vif_chanctx = NULL;
+	}
+
+	driver_data_size = sizeof(struct rtw89_dev) + bus_data_size;
+	hw = ieee80211_alloc_hw(driver_data_size, ops);
+	if (!hw)
+		goto err;
+
+	rtwdev = hw->priv;
+	rtwdev->hw = hw;
+	rtwdev->dev = device;
+	rtwdev->ops = ops;
+	rtwdev->chip = chip;
+
+	return rtwdev;
+
+err:
+	kfree(ops);
+	return NULL;
+}
+EXPORT_SYMBOL(rtw89_alloc_ieee80211_hw);
+
+void rtw89_free_ieee80211_hw(struct rtw89_dev *rtwdev)
+{
+	kfree(rtwdev->ops);
+	ieee80211_free_hw(rtwdev->hw);
+}
+EXPORT_SYMBOL(rtw89_free_ieee80211_hw);
+
 MODULE_AUTHOR("Realtek Corporation");
 MODULE_DESCRIPTION("Realtek 802.11ax wireless core module");
 MODULE_LICENSE("Dual BSD/GPL");

drivers/net/wireless/realtek/rtw89/core.h

@@ -2408,6 +2408,7 @@ struct rtw89_chip_info {
 	const struct rtw89_hfc_param_ini *hfc_param_ini;
 	const struct rtw89_dle_mem *dle_mem;
 	u32 rf_base_addr[2];
+	u8 support_chanctx_num;
 	u8 support_bands;
 	bool support_bw160;
 	bool hw_sec_hdr;
@@ -3152,6 +3153,7 @@ struct rtw89_phy_efuse_gain {
 struct rtw89_dev {
 	struct ieee80211_hw *hw;
 	struct device *dev;
+	const struct ieee80211_ops *ops;
 
 	bool dbcc_en;
 	struct rtw89_hw_scan_info scan_info;
@@ -3963,6 +3965,10 @@ int rtw89_core_init(struct rtw89_dev *rtwdev);
 void rtw89_core_deinit(struct rtw89_dev *rtwdev);
 int rtw89_core_register(struct rtw89_dev *rtwdev);
 void rtw89_core_unregister(struct rtw89_dev *rtwdev);
+struct rtw89_dev *rtw89_alloc_ieee80211_hw(struct device *device,
+					   u32 bus_data_size,
+					   const struct rtw89_chip_info *chip);
+void rtw89_free_ieee80211_hw(struct rtw89_dev *rtwdev);
 void rtw89_core_set_chip_txpwr(struct rtw89_dev *rtwdev);
 void rtw89_get_default_chandef(struct cfg80211_chan_def *chandef);
 void rtw89_set_channel(struct rtw89_dev *rtwdev);

drivers/net/wireless/realtek/rtw89/pci.c

@@ -3614,27 +3614,23 @@ static const struct rtw89_hci_ops rtw89_pci_ops = {
 
 int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	struct ieee80211_hw *hw;
 	struct rtw89_dev *rtwdev;
 	const struct rtw89_driver_info *info;
 	const struct rtw89_pci_info *pci_info;
-	int driver_data_size;
 	int ret;
 
-	driver_data_size = sizeof(struct rtw89_dev) + sizeof(struct rtw89_pci);
-	hw = ieee80211_alloc_hw(driver_data_size, &rtw89_ops);
-	if (!hw) {
+	info = (const struct rtw89_driver_info *)id->driver_data;
+
+	rtwdev = rtw89_alloc_ieee80211_hw(&pdev->dev,
+					  sizeof(struct rtw89_pci),
+					  info->chip);
+	if (!rtwdev) {
 		dev_err(&pdev->dev, "failed to allocate hw\n");
 		return -ENOMEM;
 	}
 
-	info = (const struct rtw89_driver_info *)id->driver_data;
 	pci_info = info->bus.pci;
 
-	rtwdev = hw->priv;
-	rtwdev->hw = hw;
-	rtwdev->dev = &pdev->dev;
-	rtwdev->chip = info->chip;
 	rtwdev->pci_info = info->bus.pci;
 	rtwdev->hci.ops = &rtw89_pci_ops;
 	rtwdev->hci.type = RTW89_HCI_TYPE_PCIE;
@@ -3696,7 +3692,7 @@ err_declaim_pci:
 err_core_deinit:
 	rtw89_core_deinit(rtwdev);
 err_release_hw:
-	ieee80211_free_hw(hw);
+	rtw89_free_ieee80211_hw(rtwdev);
 
 	return ret;
 }
@@ -3715,7 +3711,7 @@ void rtw89_pci_remove(struct pci_dev *pdev)
 	rtw89_pci_clear_resource(rtwdev, pdev);
 	rtw89_pci_declaim_device(rtwdev, pdev);
 	rtw89_core_deinit(rtwdev);
-	ieee80211_free_hw(hw);
+	rtw89_free_ieee80211_hw(rtwdev);
 }
 EXPORT_SYMBOL(rtw89_pci_remove);
 

drivers/net/wireless/realtek/rtw89/rtw8852a.c

@@ -2133,6 +2133,7 @@ const struct rtw89_chip_info rtw8852a_chip_info = {
 	.txpwr_factor_mac	= 1,
 	.dig_table		= &rtw89_8852a_phy_dig_table,
 	.tssi_dbw_table		= NULL,
+	.support_chanctx_num	= 0,
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ),
 	.support_bw160		= false,

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -2981,6 +2981,7 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
 	.txpwr_factor_mac	= 1,
 	.dig_table		= NULL,
 	.tssi_dbw_table		= &rtw89_8852c_tssi_dbw_table,
+	.support_chanctx_num	= 0,
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ) |
 				  BIT(NL80211_BAND_6GHZ),