sfc: support the ethtool ksettings API properly so that 25/50/100G works

Store and handle ethtool link mode masks within the driver instead of
 just a single u32.  However, quite a significant amount of existing code
 wants to manipulate the masks directly, and thus now uses the first
 unsigned long (i.e. mask[0]) as though it were a legacy u32 mask.  This
 is ok because all the bits that code is interested in are in the first
 32 bits of the mask; but it might be a good idea to change them in
 future to use the proper bitmap API.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 58 insertions, 62 deletions

diff --git a/drivers/net/ethernet/sfc/mcdi_port.c b/drivers/net/ethernet/sfc/mcdi_port.c
index 35593d67ab54..6d913dd68d62 100644
--- a/drivers/net/ethernet/sfc/mcdi_port.c
+++ b/drivers/net/ethernet/sfc/mcdi_port.c
@@ -171,89 +171,96 @@ static int efx_mcdi_mdio_write(struct net_device *net_dev,
 	return 0;
 }
 
-static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
+static void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
 {
-	u32 result = 0;
+	#define SET_BIT(name)	__set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
+					  linkset)
 
+	bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
 	switch (media) {
 	case MC_CMD_MEDIA_KX4:
-		result |= SUPPORTED_Backplane;
+		SET_BIT(Backplane);
 		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
-			result |= SUPPORTED_1000baseKX_Full;
+			SET_BIT(1000baseKX_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
-			result |= SUPPORTED_10000baseKX4_Full;
+			SET_BIT(10000baseKX4_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
-			result |= SUPPORTED_40000baseKR4_Full;
+			SET_BIT(40000baseKR4_Full);
 		break;
 
 	case MC_CMD_MEDIA_XFP:
 	case MC_CMD_MEDIA_SFP_PLUS:
 	case MC_CMD_MEDIA_QSFP_PLUS:
-		result |= SUPPORTED_FIBRE;
+		SET_BIT(FIBRE);
 		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
-			result |= SUPPORTED_1000baseT_Full;
+			SET_BIT(1000baseT_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
-			result |= SUPPORTED_10000baseT_Full;
+			SET_BIT(10000baseT_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
-			result |= SUPPORTED_40000baseCR4_Full;
+			SET_BIT(40000baseCR4_Full);
 		break;
 
 	case MC_CMD_MEDIA_BASE_T:
-		result |= SUPPORTED_TP;
+		SET_BIT(TP);
 		if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
-			result |= SUPPORTED_10baseT_Half;
+			SET_BIT(10baseT_Half);
 		if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
-			result |= SUPPORTED_10baseT_Full;
+			SET_BIT(10baseT_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
-			result |= SUPPORTED_100baseT_Half;
+			SET_BIT(100baseT_Half);
 		if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
-			result |= SUPPORTED_100baseT_Full;
+			SET_BIT(100baseT_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
-			result |= SUPPORTED_1000baseT_Half;
+			SET_BIT(1000baseT_Half);
 		if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
-			result |= SUPPORTED_1000baseT_Full;
+			SET_BIT(1000baseT_Full);
 		if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
-			result |= SUPPORTED_10000baseT_Full;
+			SET_BIT(10000baseT_Full);
 		break;
 	}
 
 	if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
-		result |= SUPPORTED_Pause;
+		SET_BIT(Pause);
 	if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
-		result |= SUPPORTED_Asym_Pause;
+		SET_BIT(Asym_Pause);
 	if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
-		result |= SUPPORTED_Autoneg;
+		SET_BIT(Autoneg);
 
-	return result;
+	#undef SET_BIT
 }
 
-static u32 ethtool_to_mcdi_cap(u32 cap)
+static u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
 {
 	u32 result = 0;
 
-	if (cap & SUPPORTED_10baseT_Half)
+	#define TEST_BIT(name)	test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
+					 linkset)
+
+	if (TEST_BIT(10baseT_Half))
 		result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
-	if (cap & SUPPORTED_10baseT_Full)
+	if (TEST_BIT(10baseT_Full))
 		result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
-	if (cap & SUPPORTED_100baseT_Half)
+	if (TEST_BIT(100baseT_Half))
 		result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
-	if (cap & SUPPORTED_100baseT_Full)
+	if (TEST_BIT(100baseT_Full))
 		result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
-	if (cap & SUPPORTED_1000baseT_Half)
+	if (TEST_BIT(1000baseT_Half))
 		result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
-	if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full))
+	if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
 		result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
-	if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full))
+	if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
 		result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
-	if (cap & (SUPPORTED_40000baseCR4_Full | SUPPORTED_40000baseKR4_Full))
+	if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
 		result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
-	if (cap & SUPPORTED_Pause)
+	if (TEST_BIT(Pause))
 		result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
-	if (cap & SUPPORTED_Asym_Pause)
+	if (TEST_BIT(Asym_Pause))
 		result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
-	if (cap & SUPPORTED_Autoneg)
+	if (TEST_BIT(Autoneg))
 		result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
 
+	#undef TEST_BIT
+
 	return result;
 }
 
@@ -285,7 +292,7 @@ static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
 	return flags;
 }
 
-static u32 mcdi_to_ethtool_media(u32 media)
+static u8 mcdi_to_ethtool_media(u32 media)
 {
 	switch (media) {
 	case MC_CMD_MEDIA_XAUI:
@@ -371,8 +378,8 @@ static int efx_mcdi_phy_probe(struct efx_nic *efx)
 
 	caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
 	if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
-		efx->link_advertising =
-			mcdi_to_ethtool_cap(phy_data->media, caps);
+		mcdi_to_ethtool_linkset(phy_data->media, caps,
+					efx->link_advertising);
 	else
 		phy_data->forced_cap = caps;
 
@@ -435,8 +442,8 @@ fail:
 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
 {
 	struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
-	u32 caps = (efx->link_advertising ?
-		    ethtool_to_mcdi_cap(efx->link_advertising) :
+	u32 caps = (efx->link_advertising[0] ?
+		    ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
 		    phy_cfg->forced_cap);
 
 	return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
@@ -509,34 +516,28 @@ static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx,
 	struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
 	int rc;
-	u32 supported, advertising, lp_advertising;
 
-	supported = mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
-	advertising = efx->link_advertising;
 	cmd->base.speed = efx->link_state.speed;
 	cmd->base.duplex = efx->link_state.fd;
 	cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
 	cmd->base.phy_address = phy_cfg->port;
-	cmd->base.autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
+	cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
 	cmd->base.mdio_support = (efx->mdio.mode_support &
 			      (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
 
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
-						supported);
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
-						advertising);
+	mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
+				cmd->link_modes.supported);
+	memcpy(cmd->link_modes.advertising, efx->link_advertising,
+	       sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
 
 	BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
 	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 			  outbuf, sizeof(outbuf), NULL);
 	if (rc)
 		return;
-	lp_advertising =
-		mcdi_to_ethtool_cap(phy_cfg->media,
-				    MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
-
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
-						lp_advertising);
+	mcdi_to_ethtool_linkset(phy_cfg->media,
+				MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
+				cmd->link_modes.lp_advertising);
 }
 
 static int
@@ -546,14 +547,10 @@ efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
 	struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 	u32 caps;
 	int rc;
-	u32 advertising;
-
-	ethtool_convert_link_mode_to_legacy_u32(&advertising,
-						cmd->link_modes.advertising);
 
 	if (cmd->base.autoneg) {
-		caps = (ethtool_to_mcdi_cap(advertising) |
-			 1 << MC_CMD_PHY_CAP_AN_LBN);
+		caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
+			1 << MC_CMD_PHY_CAP_AN_LBN);
 	} else if (cmd->base.duplex) {
 		switch (cmd->base.speed) {
 		case 10:     caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN;     break;
@@ -581,11 +578,10 @@ efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
 		return rc;
 
 	if (cmd->base.autoneg) {
-		efx_link_set_advertising(
-			efx, advertising | ADVERTISED_Autoneg);
+		efx_link_set_advertising(efx, cmd->link_modes.advertising);
 		phy_cfg->forced_cap = 0;
 	} else {
-		efx_link_set_advertising(efx, 0);
+		efx_link_clear_advertising(efx);
 		phy_cfg->forced_cap = caps;
 	}
 	return 0;