Merge branch 'net-stmmac-fix-mac-capabilities-procedure'

Serge Semin says:

====================
net: stmmac: Fix MAC-capabilities procedure

The series got born as a result of the discussions around the recent
Yanteng' series adding the Loongson LS7A1000, LS2K1000, LS7A2000, LS2K2000
MACs support:
Link: https://lore.kernel.org/netdev/fu3f6uoakylnb6eijllakeu5i4okcyqq7sfafhp5efaocbsrwe@w74xe7gb6x7p

In particular the Yanteng' patchset needed to implement the Loongson
MAC-specific constraints applied to the link speed and link duplex mode.
As a result of the discussion with Russel the next preliminary patch was
born:
Link: https://lore.kernel.org/netdev/df31e8bcf74b3b4ddb7ddf5a1c371390f16a2ad5.1712917541.git.siyanteng@loongson.cn

The patch above was a temporal solution utilized by Yanteng for further
developments and to move on with the on-going review. This patchset is a
refactored version of that single patch with formatting required for the
fixes patches.

In particular the series starts with fixing the half-duplex-less
constraint currently applied for all IP-cores. In fact it's specific for
the DW QoS Eth only (DW GMAC v4.x/v5.x).

The next patch fixes the MAC-capabilities setting up during the active
Tx/Rx queues re-initialization procedure. Particularly the procedure
missed the max-speed limit thus possibly activating speeds prohibited on
the respective platforms.

Third patch fixes the incorrect MAC-capabilities initialization for DW
MAC100, DW XGMAC and DW XLGMAC devices by moving the correct
initialization to the IP-core specific setup() methods.

That's it for now. Thanks for review and testing in advance.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-sunxi@lists.linux.dev
Cc: linux-kernel@vger.kernel.org
====================

Link: https://lore.kernel.org/r/20240412180340.7965-1-fancer.lancer@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/stmicro/stmmac/common.h

@@ -553,6 +553,7 @@ extern const struct stmmac_hwtimestamp stmmac_ptp;
 extern const struct stmmac_mode_ops dwmac4_ring_mode_ops;
 
 struct mac_link {
+	u32 caps;
 	u32 speed_mask;
 	u32 speed10;
 	u32 speed100;

drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c

@@ -1096,6 +1096,8 @@ static struct mac_device_info *sun8i_dwmac_setup(void *ppriv)
 
 	priv->dev->priv_flags |= IFF_UNICAST_FLT;
 
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_10 | MAC_100 | MAC_1000;
 	/* The loopback bit seems to be re-set when link change
 	 * Simply mask it each time
 	 * Speed 10/100/1000 are set in BIT(2)/BIT(3)

drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c

@@ -539,6 +539,8 @@ int dwmac1000_setup(struct stmmac_priv *priv)
 	if (mac->multicast_filter_bins)
 		mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
 
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_10 | MAC_100 | MAC_1000;
 	mac->link.duplex = GMAC_CONTROL_DM;
 	mac->link.speed10 = GMAC_CONTROL_PS;
 	mac->link.speed100 = GMAC_CONTROL_PS | GMAC_CONTROL_FES;

drivers/net/ethernet/stmicro/stmmac/dwmac100_core.c

@@ -175,6 +175,8 @@ int dwmac100_setup(struct stmmac_priv *priv)
 	dev_info(priv->device, "\tDWMAC100\n");
 
 	mac->pcsr = priv->ioaddr;
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_10 | MAC_100;
 	mac->link.duplex = MAC_CONTROL_F;
 	mac->link.speed10 = 0;
 	mac->link.speed100 = 0;

drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c

@@ -70,7 +70,10 @@ static void dwmac4_core_init(struct mac_device_info *hw,
 
 static void dwmac4_phylink_get_caps(struct stmmac_priv *priv)
 {
-	priv->phylink_config.mac_capabilities |= MAC_2500FD;
+	if (priv->plat->tx_queues_to_use > 1)
+		priv->hw->link.caps &= ~(MAC_10HD | MAC_100HD | MAC_1000HD);
+	else
+		priv->hw->link.caps |= (MAC_10HD | MAC_100HD | MAC_1000HD);
 }
 
 static void dwmac4_rx_queue_enable(struct mac_device_info *hw,
@@ -1378,6 +1381,8 @@ int dwmac4_setup(struct stmmac_priv *priv)
 	if (mac->multicast_filter_bins)
 		mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
 
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD;
 	mac->link.duplex = GMAC_CONFIG_DM;
 	mac->link.speed10 = GMAC_CONFIG_PS;
 	mac->link.speed100 = GMAC_CONFIG_FES | GMAC_CONFIG_PS;

drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c

@@ -47,14 +47,6 @@ static void dwxgmac2_core_init(struct mac_device_info *hw,
 	writel(XGMAC_INT_DEFAULT_EN, ioaddr + XGMAC_INT_EN);
 }
 
-static void xgmac_phylink_get_caps(struct stmmac_priv *priv)
-{
-	priv->phylink_config.mac_capabilities |= MAC_2500FD | MAC_5000FD |
-						 MAC_10000FD | MAC_25000FD |
-						 MAC_40000FD | MAC_50000FD |
-						 MAC_100000FD;
-}
-
 static void dwxgmac2_set_mac(void __iomem *ioaddr, bool enable)
 {
 	u32 tx = readl(ioaddr + XGMAC_TX_CONFIG);
@@ -1540,7 +1532,6 @@ static void dwxgmac3_fpe_configure(void __iomem *ioaddr, struct stmmac_fpe_cfg *
 
 const struct stmmac_ops dwxgmac210_ops = {
 	.core_init = dwxgmac2_core_init,
-	.phylink_get_caps = xgmac_phylink_get_caps,
 	.set_mac = dwxgmac2_set_mac,
 	.rx_ipc = dwxgmac2_rx_ipc,
 	.rx_queue_enable = dwxgmac2_rx_queue_enable,
@@ -1601,7 +1592,6 @@ static void dwxlgmac2_rx_queue_enable(struct mac_device_info *hw, u8 mode,
 
 const struct stmmac_ops dwxlgmac2_ops = {
 	.core_init = dwxgmac2_core_init,
-	.phylink_get_caps = xgmac_phylink_get_caps,
 	.set_mac = dwxgmac2_set_mac,
 	.rx_ipc = dwxgmac2_rx_ipc,
 	.rx_queue_enable = dwxlgmac2_rx_queue_enable,
@@ -1661,6 +1651,9 @@ int dwxgmac2_setup(struct stmmac_priv *priv)
 	if (mac->multicast_filter_bins)
 		mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
 
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_1000FD | MAC_2500FD | MAC_5000FD |
+			 MAC_10000FD;
 	mac->link.duplex = 0;
 	mac->link.speed10 = XGMAC_CONFIG_SS_10_MII;
 	mac->link.speed100 = XGMAC_CONFIG_SS_100_MII;
@@ -1698,6 +1691,11 @@ int dwxlgmac2_setup(struct stmmac_priv *priv)
 	if (mac->multicast_filter_bins)
 		mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
 
+	mac->link.caps = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+			 MAC_1000FD | MAC_2500FD | MAC_5000FD |
+			 MAC_10000FD | MAC_25000FD |
+			 MAC_40000FD | MAC_50000FD |
+			 MAC_100000FD;
 	mac->link.duplex = 0;
 	mac->link.speed1000 = XLGMAC_CONFIG_SS_1000;
 	mac->link.speed2500 = XLGMAC_CONFIG_SS_2500;

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -1198,17 +1198,6 @@ static int stmmac_init_phy(struct net_device *dev)
 	return ret;
 }
 
-static void stmmac_set_half_duplex(struct stmmac_priv *priv)
-{
-	/* Half-Duplex can only work with single tx queue */
-	if (priv->plat->tx_queues_to_use > 1)
-		priv->phylink_config.mac_capabilities &=
-			~(MAC_10HD | MAC_100HD | MAC_1000HD);
-	else
-		priv->phylink_config.mac_capabilities |=
-			(MAC_10HD | MAC_100HD | MAC_1000HD);
-}
-
 static int stmmac_phy_setup(struct stmmac_priv *priv)
 {
 	struct stmmac_mdio_bus_data *mdio_bus_data;
@@ -1236,15 +1225,11 @@ static int stmmac_phy_setup(struct stmmac_priv *priv)
 		xpcs_get_interfaces(priv->hw->xpcs,
 				    priv->phylink_config.supported_interfaces);
 
-	priv->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
-						MAC_10FD | MAC_100FD |
-						MAC_1000FD;
-
-	stmmac_set_half_duplex(priv);
-
 	/* Get the MAC specific capabilities */
 	stmmac_mac_phylink_get_caps(priv);
 
+	priv->phylink_config.mac_capabilities = priv->hw->link.caps;
+
 	max_speed = priv->plat->max_speed;
 	if (max_speed)
 		phylink_limit_mac_speed(&priv->phylink_config, max_speed);
@@ -7342,6 +7327,7 @@ int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 	int ret = 0, i;
+	int max_speed;
 
 	if (netif_running(dev))
 		stmmac_release(dev);
@@ -7355,7 +7341,14 @@ int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt)
 			priv->rss.table[i] = ethtool_rxfh_indir_default(i,
 									rx_cnt);
 
-	stmmac_set_half_duplex(priv);
+	stmmac_mac_phylink_get_caps(priv);
+
+	priv->phylink_config.mac_capabilities = priv->hw->link.caps;
+
+	max_speed = priv->plat->max_speed;
+	if (max_speed)
+		phylink_limit_mac_speed(&priv->phylink_config, max_speed);
+
 	stmmac_napi_add(dev);
 
 	if (netif_running(dev))