1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.h b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h
new file mode 100644
index 000000000000..f53be6e6aef9
--- /dev/null
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) Meta Platforms, Inc. and affiliates. */
+
+#ifndef _FBNIC_MAC_H_
+#define _FBNIC_MAC_H_
+
+#include <linux/types.h>
+
+struct fbnic_dev;
+
+#define FBNIC_MAX_JUMBO_FRAME_SIZE	9742
+
+enum {
+	FBNIC_LINK_EVENT_NONE	= 0,
+	FBNIC_LINK_EVENT_UP	= 1,
+	FBNIC_LINK_EVENT_DOWN	= 2,
+};
+
+/* Treat the FEC bits as a bitmask laid out as follows:
+ * Bit 0: RS Enabled
+ * Bit 1: BASER(Firecode) Enabled
+ * Bit 2: Retrieve FEC from FW
+ */
+enum {
+	FBNIC_FEC_OFF		= 0,
+	FBNIC_FEC_RS		= 1,
+	FBNIC_FEC_BASER		= 2,
+	FBNIC_FEC_AUTO		= 4,
+};
+
+#define FBNIC_FEC_MODE_MASK	(FBNIC_FEC_AUTO - 1)
+
+/* Treat the link modes as a set of modulation/lanes bitmask:
+ * Bit 0: Lane Count, 0 = R1, 1 = R2
+ * Bit 1: Modulation, 0 = NRZ, 1 = PAM4
+ * Bit 2: Retrieve link mode from FW
+ */
+enum {
+	FBNIC_LINK_25R1		= 0,
+	FBNIC_LINK_50R2		= 1,
+	FBNIC_LINK_50R1		= 2,
+	FBNIC_LINK_100R2	= 3,
+	FBNIC_LINK_AUTO		= 4,
+};
+
+#define FBNIC_LINK_MODE_R2	(FBNIC_LINK_50R2)
+#define FBNIC_LINK_MODE_PAM4	(FBNIC_LINK_50R1)
+#define FBNIC_LINK_MODE_MASK	(FBNIC_LINK_AUTO - 1)
+
+/* This structure defines the interface hooks for the MAC. The MAC hooks
+ * will be configured as a const struct provided with a set of function
+ * pointers.
+ *
+ * void (*init_regs)(struct fbnic_dev *fbd);
+ *	Initialize MAC registers to enable Tx/Rx paths and FIFOs.
+ *
+ * void (*pcs_enable)(struct fbnic_dev *fbd);
+ *	Configure and enable PCS to enable link if not already enabled
+ * void (*pcs_disable)(struct fbnic_dev *fbd);
+ *	Shutdown the link if we are the only consumer of it.
+ * bool (*pcs_get_link)(struct fbnic_dev *fbd);
+ *	Check PCS link status
+ * int (*pcs_get_link_event)(struct fbnic_dev *fbd)
+ *	Get the current link event status, reports true if link has
+ *	changed to either FBNIC_LINK_EVENT_DOWN or FBNIC_LINK_EVENT_UP
+ *
+ * void (*link_down)(struct fbnic_dev *fbd);
+ *	Configure MAC for link down event
+ * void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);
+ *	Configure MAC for link up event;
+ *
+ */
+struct fbnic_mac {
+	void (*init_regs)(struct fbnic_dev *fbd);
+
+	int (*pcs_enable)(struct fbnic_dev *fbd);
+	void (*pcs_disable)(struct fbnic_dev *fbd);
+	bool (*pcs_get_link)(struct fbnic_dev *fbd);
+	int (*pcs_get_link_event)(struct fbnic_dev *fbd);
+
+	void (*link_down)(struct fbnic_dev *fbd);
+	void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);
+};
+
+int fbnic_mac_init(struct fbnic_dev *fbd);
+#endif /* _FBNIC_MAC_H_ */