dpaa2-eth: add MAC/PHY support through phylink

The dpaa2-eth driver now has support for connecting to its associated
PHY device found through standard OF bindings.

This happens when the DPNI object (that the driver probes on) gets
connected to a DPMAC. When that happens, the device tree is looked up by
the DPMAC ID, and the associated PHY bindings are found.

The old logic of handling the net device's link state by hand still
needs to be kept, as the DPNI can be connected to other devices on the
bus than a DPMAC: other DPNI, DPSW ports, etc. This logic is only
engaged when there is no DPMAC (and therefore no phylink instance)
attached.

The MC firmware support multiple type of DPMAC links: TYPE_FIXED,
TYPE_PHY. The TYPE_FIXED mode does not require any DPMAC management from
Linux side, and as such, the driver will not handle such a DPMAC.

Although PHYLINK typically handles SFP cages and in-band AN modes, for
the moment the driver only supports the RGMII interfaces found on the
LX2160A. Support for other modes will come later.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpmac.h b/drivers/net/ethernet/freescale/dpaa2/dpmac.h
new file mode 100644
index 000000000000..4efc410a479e
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa2/dpmac.h
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/* Copyright 2013-2016 Freescale Semiconductor Inc.
+ * Copyright 2019 NXP
+ */
+#ifndef __FSL_DPMAC_H
+#define __FSL_DPMAC_H
+
+/* Data Path MAC API
+ * Contains initialization APIs and runtime control APIs for DPMAC
+ */
+
+struct fsl_mc_io;
+
+int dpmac_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpmac_id,
+	       u16 *token);
+
+int dpmac_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token);
+
+/**
+ * enum dpmac_link_type -  DPMAC link type
+ * @DPMAC_LINK_TYPE_NONE: No link
+ * @DPMAC_LINK_TYPE_FIXED: Link is fixed type
+ * @DPMAC_LINK_TYPE_PHY: Link by PHY ID
+ * @DPMAC_LINK_TYPE_BACKPLANE: Backplane link type
+ */
+enum dpmac_link_type {
+	DPMAC_LINK_TYPE_NONE,
+	DPMAC_LINK_TYPE_FIXED,
+	DPMAC_LINK_TYPE_PHY,
+	DPMAC_LINK_TYPE_BACKPLANE
+};
+
+/**
+ * enum dpmac_eth_if - DPMAC Ethrnet interface
+ * @DPMAC_ETH_IF_MII: MII interface
+ * @DPMAC_ETH_IF_RMII: RMII interface
+ * @DPMAC_ETH_IF_SMII: SMII interface
+ * @DPMAC_ETH_IF_GMII: GMII interface
+ * @DPMAC_ETH_IF_RGMII: RGMII interface
+ * @DPMAC_ETH_IF_SGMII: SGMII interface
+ * @DPMAC_ETH_IF_QSGMII: QSGMII interface
+ * @DPMAC_ETH_IF_XAUI: XAUI interface
+ * @DPMAC_ETH_IF_XFI: XFI interface
+ * @DPMAC_ETH_IF_CAUI: CAUI interface
+ * @DPMAC_ETH_IF_1000BASEX: 1000BASEX interface
+ * @DPMAC_ETH_IF_USXGMII: USXGMII interface
+ */
+enum dpmac_eth_if {
+	DPMAC_ETH_IF_MII,
+	DPMAC_ETH_IF_RMII,
+	DPMAC_ETH_IF_SMII,
+	DPMAC_ETH_IF_GMII,
+	DPMAC_ETH_IF_RGMII,
+	DPMAC_ETH_IF_SGMII,
+	DPMAC_ETH_IF_QSGMII,
+	DPMAC_ETH_IF_XAUI,
+	DPMAC_ETH_IF_XFI,
+	DPMAC_ETH_IF_CAUI,
+	DPMAC_ETH_IF_1000BASEX,
+	DPMAC_ETH_IF_USXGMII,
+};
+
+/**
+ * struct dpmac_attr - Structure representing DPMAC attributes
+ * @id:		DPMAC object ID
+ * @max_rate:	Maximum supported rate - in Mbps
+ * @eth_if:	Ethernet interface
+ * @link_type:	link type
+ */
+struct dpmac_attr {
+	u16 id;
+	u32 max_rate;
+	enum dpmac_eth_if eth_if;
+	enum dpmac_link_type link_type;
+};
+
+int dpmac_get_attributes(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token,
+			 struct dpmac_attr *attr);
+
+/**
+ * DPMAC link configuration/state options
+ */
+
+/**
+ * Enable auto-negotiation
+ */
+#define DPMAC_LINK_OPT_AUTONEG			BIT_ULL(0)
+/**
+ * Enable half-duplex mode
+ */
+#define DPMAC_LINK_OPT_HALF_DUPLEX		BIT_ULL(1)
+/**
+ * Enable pause frames
+ */
+#define DPMAC_LINK_OPT_PAUSE			BIT_ULL(2)
+/**
+ * Enable a-symmetric pause frames
+ */
+#define DPMAC_LINK_OPT_ASYM_PAUSE		BIT_ULL(3)
+
+/**
+ * Advertised link speeds
+ */
+#define DPMAC_ADVERTISED_10BASET_FULL		BIT_ULL(0)
+#define DPMAC_ADVERTISED_100BASET_FULL		BIT_ULL(1)
+#define DPMAC_ADVERTISED_1000BASET_FULL		BIT_ULL(2)
+#define DPMAC_ADVERTISED_10000BASET_FULL	BIT_ULL(4)
+#define DPMAC_ADVERTISED_2500BASEX_FULL		BIT_ULL(5)
+
+/**
+ * Advertise auto-negotiation enable
+ */
+#define DPMAC_ADVERTISED_AUTONEG		BIT_ULL(3)
+
+/**
+ * struct dpmac_link_state - DPMAC link configuration request
+ * @rate: Rate in Mbps
+ * @options: Enable/Disable DPMAC link cfg features (bitmap)
+ * @up: Link state
+ * @state_valid: Ignore/Update the state of the link
+ * @supported: Speeds capability of the phy (bitmap)
+ * @advertising: Speeds that are advertised for autoneg (bitmap)
+ */
+struct dpmac_link_state {
+	u32 rate;
+	u64 options;
+	int up;
+	int state_valid;
+	u64 supported;
+	u64 advertising;
+};
+
+int dpmac_set_link_state(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token,
+			 struct dpmac_link_state *link_state);
+
+#endif /* __FSL_DPMAC_H */