1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ram.h b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ram.h
new file mode 100644
index 000000000000..7558c1510cbf
--- /dev/null
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ram.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
+ *
+ * Copyright (c) 2021, 2022 Pengutronix,
+ *               Marc Kleine-Budde <kernel@pengutronix.de>
+ */
+
+#ifndef _MCP251XFD_RAM_H
+#define _MCP251XFD_RAM_H
+
+#include <linux/ethtool.h>
+
+#define CAN_RAM_NUM_MAX (-1)
+
+enum can_ram_mode {
+	CAN_RAM_MODE_CAN,
+	CAN_RAM_MODE_CANFD,
+	__CAN_RAM_MODE_MAX
+};
+
+struct can_ram_obj_config {
+	u8 size[__CAN_RAM_MODE_MAX];
+
+	u8 def[__CAN_RAM_MODE_MAX];
+	u8 min;
+	u8 max;
+
+	u8 fifo_num;
+	u8 fifo_depth_min;
+	u8 fifo_depth_coalesce_min;
+};
+
+struct can_ram_config {
+	const struct can_ram_obj_config rx;
+	const struct can_ram_obj_config tx;
+
+	u16 size;
+	u8 fifo_depth;
+};
+
+struct can_ram_layout {
+	u8 default_rx;
+	u8 default_tx;
+
+	u8 max_rx;
+	u8 max_tx;
+
+	u8 cur_rx;
+	u8 cur_tx;
+
+	u8 rx_coalesce;
+	u8 tx_coalesce;
+};
+
+void can_ram_get_layout(struct can_ram_layout *layout,
+			const struct can_ram_config *config,
+			const struct ethtool_ringparam *ring,
+			const struct ethtool_coalesce *ec,
+			const bool fd_mode);
+
+#endif