[PATCH net-next 6/8] net: ethernet: mtk_eth_soc: convert caps in mtk_soc_data struct to u64

[PATCH net-next 6/8] net: ethernet: mtk_eth_soc: convert caps in mtk_soc_data struct to u64

[Daniel Golle]

From: Lorenzo Bianconi <lorenzo@kernel.org>

This is a preliminary patch to introduce support for MT7988 SoC.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_path.c | 22 +++----
 drivers/net/ethernet/mediatek/mtk_eth_soc.h  | 62 ++++++++++----------
 2 files changed, 42 insertions(+), 42 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_path.c b/drivers/net/ethernet/mediatek/mtk_eth_path.c
index 317e447f49916..34ac492e047cb 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_path.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_path.c
@@ -15,10 +15,10 @@
 struct mtk_eth_muxc {
 	const char	*name;
 	int		cap_bit;
-	int		(*set_path)(struct mtk_eth *eth, int path);
+	int		(*set_path)(struct mtk_eth *eth, u64 path);
 };
 
-static const char *mtk_eth_path_name(int path)
+static const char *mtk_eth_path_name(u64 path)
 {
 	switch (path) {
 	case MTK_ETH_PATH_GMAC1_RGMII:
@@ -40,7 +40,7 @@ static const char *mtk_eth_path_name(int path)
 	}
 }
 
-static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, int path)
+static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, u64 path)
 {
 	bool updated = true;
 	u32 val, mask, set;
@@ -71,7 +71,7 @@ static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, int path)
 	return 0;
 }
 
-static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, int path)
+static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0;
 	bool updated = true;
@@ -94,7 +94,7 @@ static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, int path)
 	return 0;
 }
 
-static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path)
+static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0, mask = 0, reg = 0;
 	bool updated = true;
@@ -125,7 +125,7 @@ static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path)
 	return 0;
 }
 
-static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, int path)
+static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0;
 	bool updated = true;
@@ -163,7 +163,7 @@ static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, int path)
 	return 0;
 }
 
-static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, int path)
+static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0;
 	bool updated = true;
@@ -218,7 +218,7 @@ static const struct mtk_eth_muxc mtk_eth_muxc[] = {
 	},
 };
 
-static int mtk_eth_mux_setup(struct mtk_eth *eth, int path)
+static int mtk_eth_mux_setup(struct mtk_eth *eth, u64 path)
 {
 	int i, err = 0;
 
@@ -249,7 +249,7 @@ static int mtk_eth_mux_setup(struct mtk_eth *eth, int path)
 
 int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
 {
-	int path;
+	u64 path;
 
 	path = (mac_id == 0) ?  MTK_ETH_PATH_GMAC1_SGMII :
 				MTK_ETH_PATH_GMAC2_SGMII;
@@ -260,7 +260,7 @@ int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
 
 int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id)
 {
-	int path = 0;
+	u64 path = 0;
 
 	if (mac_id == 1)
 		path = MTK_ETH_PATH_GMAC2_GEPHY;
@@ -274,7 +274,7 @@ int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id)
 
 int mtk_gmac_rgmii_path_setup(struct mtk_eth *eth, int mac_id)
 {
-	int path;
+	u64 path;
 
 	path = (mac_id == 0) ?  MTK_ETH_PATH_GMAC1_RGMII :
 				MTK_ETH_PATH_GMAC2_RGMII;
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 08d1e73985f08..9bd7261449d13 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -875,44 +875,44 @@ enum mkt_eth_capabilities {
 };
 
 /* Supported hardware group on SoCs */
-#define MTK_RGMII		BIT(MTK_RGMII_BIT)
-#define MTK_TRGMII		BIT(MTK_TRGMII_BIT)
-#define MTK_SGMII		BIT(MTK_SGMII_BIT)
-#define MTK_ESW			BIT(MTK_ESW_BIT)
-#define MTK_GEPHY		BIT(MTK_GEPHY_BIT)
-#define MTK_MUX			BIT(MTK_MUX_BIT)
-#define MTK_INFRA		BIT(MTK_INFRA_BIT)
-#define MTK_SHARED_SGMII	BIT(MTK_SHARED_SGMII_BIT)
-#define MTK_HWLRO		BIT(MTK_HWLRO_BIT)
-#define MTK_SHARED_INT		BIT(MTK_SHARED_INT_BIT)
-#define MTK_TRGMII_MT7621_CLK	BIT(MTK_TRGMII_MT7621_CLK_BIT)
-#define MTK_QDMA		BIT(MTK_QDMA_BIT)
-#define MTK_NETSYS_V1		BIT(MTK_NETSYS_V1_BIT)
-#define MTK_NETSYS_V2		BIT(MTK_NETSYS_V2_BIT)
-#define MTK_NETSYS_V3		BIT(MTK_NETSYS_V3_BIT)
-#define MTK_SOC_MT7628		BIT(MTK_SOC_MT7628_BIT)
-#define MTK_RSTCTRL_PPE1	BIT(MTK_RSTCTRL_PPE1_BIT)
-#define MTK_U3_COPHY_V2		BIT(MTK_U3_COPHY_V2_BIT)
+#define MTK_RGMII		BIT_ULL(MTK_RGMII_BIT)
+#define MTK_TRGMII		BIT_ULL(MTK_TRGMII_BIT)
+#define MTK_SGMII		BIT_ULL(MTK_SGMII_BIT)
+#define MTK_ESW			BIT_ULL(MTK_ESW_BIT)
+#define MTK_GEPHY		BIT_ULL(MTK_GEPHY_BIT)
+#define MTK_MUX			BIT_ULL(MTK_MUX_BIT)
+#define MTK_INFRA		BIT_ULL(MTK_INFRA_BIT)
+#define MTK_SHARED_SGMII	BIT_ULL(MTK_SHARED_SGMII_BIT)
+#define MTK_HWLRO		BIT_ULL(MTK_HWLRO_BIT)
+#define MTK_SHARED_INT		BIT_ULL(MTK_SHARED_INT_BIT)
+#define MTK_TRGMII_MT7621_CLK	BIT_ULL(MTK_TRGMII_MT7621_CLK_BIT)
+#define MTK_QDMA		BIT_ULL(MTK_QDMA_BIT)
+#define MTK_NETSYS_V1		BIT_ULL(MTK_NETSYS_V1_BIT)
+#define MTK_NETSYS_V2		BIT_ULL(MTK_NETSYS_V2_BIT)
+#define MTK_NETSYS_V3		BIT_ULL(MTK_NETSYS_V3_BIT)
+#define MTK_SOC_MT7628		BIT_ULL(MTK_SOC_MT7628_BIT)
+#define MTK_RSTCTRL_PPE1	BIT_ULL(MTK_RSTCTRL_PPE1_BIT)
+#define MTK_U3_COPHY_V2		BIT_ULL(MTK_U3_COPHY_V2_BIT)
 
 #define MTK_ETH_MUX_GDM1_TO_GMAC1_ESW		\
-	BIT(MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT)
+	BIT_ULL(MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT)
 #define MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY	\
-	BIT(MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY_BIT)
+	BIT_ULL(MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY_BIT)
 #define MTK_ETH_MUX_U3_GMAC2_TO_QPHY		\
-	BIT(MTK_ETH_MUX_U3_GMAC2_TO_QPHY_BIT)
+	BIT_ULL(MTK_ETH_MUX_U3_GMAC2_TO_QPHY_BIT)
 #define MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII	\
-	BIT(MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII_BIT)
+	BIT_ULL(MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII_BIT)
 #define MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII	\
-	BIT(MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII_BIT)
+	BIT_ULL(MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII_BIT)
 
 /* Supported path present on SoCs */
-#define MTK_ETH_PATH_GMAC1_RGMII	BIT(MTK_ETH_PATH_GMAC1_RGMII_BIT)
-#define MTK_ETH_PATH_GMAC1_TRGMII	BIT(MTK_ETH_PATH_GMAC1_TRGMII_BIT)
-#define MTK_ETH_PATH_GMAC1_SGMII	BIT(MTK_ETH_PATH_GMAC1_SGMII_BIT)
-#define MTK_ETH_PATH_GMAC2_RGMII	BIT(MTK_ETH_PATH_GMAC2_RGMII_BIT)
-#define MTK_ETH_PATH_GMAC2_SGMII	BIT(MTK_ETH_PATH_GMAC2_SGMII_BIT)
-#define MTK_ETH_PATH_GMAC2_GEPHY	BIT(MTK_ETH_PATH_GMAC2_GEPHY_BIT)
-#define MTK_ETH_PATH_GDM1_ESW		BIT(MTK_ETH_PATH_GDM1_ESW_BIT)
+#define MTK_ETH_PATH_GMAC1_RGMII	BIT_ULL(MTK_ETH_PATH_GMAC1_RGMII_BIT)
+#define MTK_ETH_PATH_GMAC1_TRGMII	BIT_ULL(MTK_ETH_PATH_GMAC1_TRGMII_BIT)
+#define MTK_ETH_PATH_GMAC1_SGMII	BIT_ULL(MTK_ETH_PATH_GMAC1_SGMII_BIT)
+#define MTK_ETH_PATH_GMAC2_RGMII	BIT_ULL(MTK_ETH_PATH_GMAC2_RGMII_BIT)
+#define MTK_ETH_PATH_GMAC2_SGMII	BIT_ULL(MTK_ETH_PATH_GMAC2_SGMII_BIT)
+#define MTK_ETH_PATH_GMAC2_GEPHY	BIT_ULL(MTK_ETH_PATH_GMAC2_GEPHY_BIT)
+#define MTK_ETH_PATH_GDM1_ESW		BIT_ULL(MTK_ETH_PATH_GDM1_ESW_BIT)
 
 #define MTK_GMAC1_RGMII		(MTK_ETH_PATH_GMAC1_RGMII | MTK_RGMII)
 #define MTK_GMAC1_TRGMII	(MTK_ETH_PATH_GMAC1_TRGMII | MTK_TRGMII)
@@ -1062,7 +1062,7 @@ struct mtk_reg_map {
 struct mtk_soc_data {
 	const struct mtk_reg_map *reg_map;
 	u32             ana_rgc3;
-	u32		caps;
+	u64		caps;
 	u32		required_clks;
 	bool		required_pctl;
 	u8		offload_version;
-- 
2.41.0

Re: [PATCH net-next 6/8] net: ethernet: mtk_eth_soc: convert caps in mtk_soc_data struct to u64

[Russell King (Oracle)]

On Sun, Jun 11, 2023 at 01:39:48AM +0100, Daniel Golle wrote:
> From: Lorenzo Bianconi <lorenzo@kernel.org>
> 
> This is a preliminary patch to introduce support for MT7988 SoC.
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

At some point, I'd really like to unpick this and see whether there's a
better structure to it - so that mac_config() doesn't have to save the
syscfg0 value, and restore it in mac_finish(). Given that syscfg0 is a
shared register, are we sure the code that updates this register is safe
from races caused by two MACs going through the config progress in two
separate CPUs at the same time?

Is there anything which prevents two or more MACs wanting to mess with
the contents of the SYSCFG0_SGMII_MASK bits? It's difficult to tell with
the current code.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

Re: [PATCH net-next 6/8] net: ethernet: mtk_eth_soc: convert caps in mtk_soc_data struct to u64

[Lorenzo Bianconi]

[-- Attachment #1: Type: text/plain, Size: 1226 bytes --]

> On Sun, Jun 11, 2023 at 01:39:48AM +0100, Daniel Golle wrote:
> > From: Lorenzo Bianconi <lorenzo@kernel.org>
> > 
> > This is a preliminary patch to introduce support for MT7988 SoC.
> > 
> > Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> > Signed-off-by: Daniel Golle <daniel@makrotopia.org>
> 
> At some point, I'd really like to unpick this and see whether there's a
> better structure to it - so that mac_config() doesn't have to save the
> syscfg0 value, and restore it in mac_finish(). Given that syscfg0 is a
> shared register, are we sure the code that updates this register is safe
> from races caused by two MACs going through the config progress in two
> separate CPUs at the same time?

Agree, this seems a bit racy. However it does not seem related to this patch.
I would say we can address it with a follow-up patch.

Regards,
Lorenzo

> 
> Is there anything which prevents two or more MACs wanting to mess with
> the contents of the SYSCFG0_SGMII_MASK bits? It's difficult to tell with
> the current code.
> 
> Thanks.
> 
> -- 
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
> 

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