generic: add support for MediaTek NETSYS v3

In order to support Ethernet on the MT7988 SoC add support for NETSYS v3
as well as new paths and USXGMII SerDes to the mtk_eth_soc driver.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 6983a215d9d1966f95bc5b1c0045c200948b2079)

1 files changed, 153 insertions, 0 deletions

diff --git a/target/linux/generic/pending-5.15/737-03-net-ethernet-mtk_eth_soc-rely-on-num_devs-and-remove.patch b/target/linux/generic/pending-5.15/737-03-net-ethernet-mtk_eth_soc-rely-on-num_devs-and-remove.patch
new file mode 100644
index 0000000000..d6b36bf636
--- /dev/null
+++ b/target/linux/generic/pending-5.15/737-03-net-ethernet-mtk_eth_soc-rely-on-num_devs-and-remove.patch
@@ -0,0 +1,153 @@
+From 4e35e80750b33727e606be9e7ce447bde2e0deb7 Mon Sep 17 00:00:00 2001
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Tue, 7 Mar 2023 15:55:35 +0000
+Subject: [PATCH 3/7] net: ethernet: mtk_eth_soc: rely on num_devs and remove
+ MTK_MAC_COUNT
+
+Get rid of MTK_MAC_COUNT since it is a duplicated of eth->soc->num_devs.
+
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 30 ++++++++++-----------
+ drivers/net/ethernet/mediatek/mtk_eth_soc.h |  1 -
+ 2 files changed, 15 insertions(+), 16 deletions(-)
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -900,7 +900,7 @@ static void mtk_stats_update(struct mtk_
+ {
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->mac[i] || !eth->mac[i]->hw_stats)
+ 			continue;
+ 		if (spin_trylock(&eth->mac[i]->hw_stats->stats_lock)) {
+@@ -1403,7 +1403,7 @@ static int mtk_queue_stopped(struct mtk_
+ {
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->netdev[i])
+ 			continue;
+ 		if (netif_queue_stopped(eth->netdev[i]))
+@@ -1417,7 +1417,7 @@ static void mtk_wake_queue(struct mtk_et
+ {
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->netdev[i])
+ 			continue;
+ 		netif_tx_wake_all_queues(eth->netdev[i]);
+@@ -1908,7 +1908,7 @@ static int mtk_poll_rx(struct napi_struc
+ 			 !(trxd.rxd4 & RX_DMA_SPECIAL_TAG))
+ 			mac = RX_DMA_GET_SPORT(trxd.rxd4) - 1;
+ 
+-		if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT ||
++		if (unlikely(mac < 0 || mac >= eth->soc->num_devs ||
+ 			     !eth->netdev[mac]))
+ 			goto release_desc;
+ 
+@@ -2937,7 +2937,7 @@ static void mtk_dma_free(struct mtk_eth
+ 	const struct mtk_soc_data *soc = eth->soc;
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++)
++	for (i = 0; i < soc->num_devs; i++)
+ 		if (eth->netdev[i])
+ 			netdev_reset_queue(eth->netdev[i]);
+ 	if (eth->scratch_ring) {
+@@ -3091,7 +3091,7 @@ static void mtk_gdm_config(struct mtk_et
+ 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
+ 		return;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i));
+ 
+ 		/* default setup the forward port to send frame to PDMA */
+@@ -3704,7 +3704,7 @@ static int mtk_hw_init(struct mtk_eth *e
+ 	 * up with the more appropriate value when mtk_mac_config call is being
+ 	 * invoked.
+ 	 */
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		struct net_device *dev = eth->netdev[i];
+ 
+ 		mtk_w32(eth, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(i));
+@@ -3909,7 +3909,7 @@ static void mtk_pending_work(struct work
+ 	mtk_prepare_for_reset(eth);
+ 
+ 	/* stop all devices to make sure that dma is properly shut down */
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->netdev[i] || !netif_running(eth->netdev[i]))
+ 			continue;
+ 
+@@ -3925,7 +3925,7 @@ static void mtk_pending_work(struct work
+ 	mtk_hw_init(eth, true);
+ 
+ 	/* restart DMA and enable IRQs */
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!test_bit(i, &restart))
+ 			continue;
+ 
+@@ -3953,7 +3953,7 @@ static int mtk_free_dev(struct mtk_eth *
+ {
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->netdev[i])
+ 			continue;
+ 		free_netdev(eth->netdev[i]);
+@@ -3972,7 +3972,7 @@ static int mtk_unreg_dev(struct mtk_eth
+ {
+ 	int i;
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		struct mtk_mac *mac;
+ 		if (!eth->netdev[i])
+ 			continue;
+@@ -4277,7 +4277,7 @@ static int mtk_add_mac(struct mtk_eth *e
+ 	}
+ 
+ 	id = be32_to_cpup(_id);
+-	if (id >= MTK_MAC_COUNT) {
++	if (id >= eth->soc->num_devs) {
+ 		dev_err(eth->dev, "%d is not a valid mac id\n", id);
+ 		return -EINVAL;
+ 	}
+@@ -4407,7 +4407,7 @@ void mtk_eth_set_dma_device(struct mtk_e
+ 
+ 	rtnl_lock();
+ 
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		dev = eth->netdev[i];
+ 
+ 		if (!dev || !(dev->flags & IFF_UP))
+@@ -4734,7 +4734,7 @@ static int mtk_remove(struct platform_de
+ 	int i;
+ 
+ 	/* stop all devices to make sure that dma is properly shut down */
+-	for (i = 0; i < MTK_MAC_COUNT; i++) {
++	for (i = 0; i < eth->soc->num_devs; i++) {
+ 		if (!eth->netdev[i])
+ 			continue;
+ 		mtk_stop(eth->netdev[i]);
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+@@ -33,7 +33,6 @@
+ #define MTK_TX_DMA_BUF_LEN_V2	0xffff
+ #define MTK_QDMA_RING_SIZE	2048
+ #define MTK_DMA_SIZE		512
+-#define MTK_MAC_COUNT		2
+ #define MTK_RX_ETH_HLEN		(VLAN_ETH_HLEN + ETH_FCS_LEN)
+ #define MTK_RX_HLEN		(NET_SKB_PAD + MTK_RX_ETH_HLEN + NET_IP_ALIGN)
+ #define MTK_DMA_DUMMY_DESC	0xffffffff