Initialize basic mbx function.

Signed-off-by: Dong Yibo <dong100@mucse.com>
---
  drivers/net/ethernet/mucse/rnpgbe/Makefile    |   5 +-
  drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h    |  46 ++
  .../net/ethernet/mucse/rnpgbe/rnpgbe_chip.c   |   5 +-
  drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h |   2 +
  .../net/ethernet/mucse/rnpgbe/rnpgbe_main.c   |   1 +
  .../net/ethernet/mucse/rnpgbe/rnpgbe_mbx.c    | 623 ++++++++++++++++++
  .../net/ethernet/mucse/rnpgbe/rnpgbe_mbx.h    |  48 ++
  7 files changed, 727 insertions(+), 3 deletions(-)
  create mode 100644 drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx.c
  create mode 100644 drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx.h

diff --git a/drivers/net/ethernet/mucse/rnpgbe/Makefile b/drivers/net/ethernet/mucse/rnpgbe/Makefile
index 42c359f459d9..41177103b50c 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/Makefile
+++ b/drivers/net/ethernet/mucse/rnpgbe/Makefile

@@ -5,5 +5,6 @@
  #
  
  obj-$(CONFIG_MGBE) += rnpgbe.o
-rnpgbe-objs := rnpgbe_main.o\
-	       rnpgbe_chip.o
+rnpgbe-objs := rnpgbe_main.o \
+	       rnpgbe_chip.o \
+	       rnpgbe_mbx.o

diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
index 2ae836fc8951..46e2bb2fe71e 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h

@@ -63,9 +63,51 @@ struct mucse_mac_info {
  	int clk_csr;
  };
  
+struct mucse_hw;
+
+enum MBX_ID {
+	MBX_VF0 = 0,
+	MBX_VF1,
+	MBX_VF2,
+	MBX_VF3,
+	MBX_VF4,
+	MBX_VF5,
+	MBX_VF6,
+	MBX_VF7,
+	MBX_CM3CPU,
+	MBX_FW = MBX_CM3CPU,
+	MBX_VFCNT
+};
+
+struct mucse_mbx_operations {
+	void (*init_params)(struct mucse_hw *hw);
+	int (*read)(struct mucse_hw *hw, u32 *msg,
+		    u16 size, enum MBX_ID id);
+	int (*write)(struct mucse_hw *hw, u32 *msg,
+		     u16 size, enum MBX_ID id);
+	int (*read_posted)(struct mucse_hw *hw, u32 *msg,
+			   u16 size, enum MBX_ID id);
+	int (*write_posted)(struct mucse_hw *hw, u32 *msg,
+			    u16 size, enum MBX_ID id);
+	int (*check_for_msg)(struct mucse_hw *hw, enum MBX_ID id);
+	int (*check_for_ack)(struct mucse_hw *hw, enum MBX_ID id);
+	void (*configure)(struct mucse_hw *hw, int num_vec,
+			  bool enable);
+};
+
+struct mucse_mbx_stats {
+	u32 msgs_tx;
+	u32 msgs_rx;
+	u32 acks;
+	u32 reqs;
+	u32 rsts;
+};
+
  #define MAX_VF_NUM (8)
  
  struct mucse_mbx_info {
+	struct mucse_mbx_operations ops;
+	struct mucse_mbx_stats stats;
  	u32 timeout;
  	u32 usec_delay;
  	u32 v2p_mailbox;

@@ -99,6 +141,8 @@ struct mucse_mbx_info {
  	int share_size;
  };
  
+#include "rnpgbe_mbx.h"
+
  struct mucse_hw {
  	void *back;
  	u8 pfvfnum;

@@ -110,6 +154,8 @@ struct mucse_hw {
  	u16 vendor_id;
  	u16 subsystem_device_id;
  	u16 subsystem_vendor_id;
+	int max_vfs;
+	int max_vfs_noari;
  	enum rnpgbe_hw_type hw_type;
  	struct mucse_dma_info dma;
  	struct mucse_eth_info eth;

diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c
index 38c094965db9..b0e5fda632f3 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_chip.c

@@ -6,6 +6,7 @@
  
  #include "rnpgbe.h"
  #include "rnpgbe_hw.h"
+#include "rnpgbe_mbx.h"
  
  /**
   * rnpgbe_get_invariants_n500 - setup for hw info

@@ -67,7 +68,7 @@ static void rnpgbe_get_invariants_n500(struct mucse_hw *hw)
  	mbx->fw_pf_mbox_mask = 0x2e200;
  	mbx->fw_vf_share_ram = 0x2b000;
  	mbx->share_size = 512;
-
+	memcpy(&hw->mbx.ops, &mucse_mbx_ops_generic, sizeof(hw->mbx.ops));

  	/* setup net feature here */
  	hw->feature_flags |= M_NET_FEATURE_SG |
  			     M_NET_FEATURE_TX_CHECKSUM |

@@ -83,6 +84,7 @@ static void rnpgbe_get_invariants_n500(struct mucse_hw *hw)
  			     M_NET_FEATURE_STAG_OFFLOAD;
  	/* start the default ahz, update later */
  	hw->usecstocount = 125;
+	hw->max_vfs = 7;
  }
  
  /**

@@ -117,6 +119,7 @@ static void rnpgbe_get_invariants_n210(struct mucse_hw *hw)
  	/* update hw feature */
  	hw->feature_flags |= M_HW_FEATURE_EEE;
  	hw->usecstocount = 62;
+	hw->max_vfs_noari = 7;
  }
  
  const struct rnpgbe_info rnpgbe_n500_info = {

diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h
index 2c7372a5e88d..ff7bd9b21550 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h

@@ -14,6 +14,8 @@
  #define RNPGBE_RING_BASE (0x1000)
  #define RNPGBE_MAC_BASE (0x20000)
  #define RNPGBE_ETH_BASE (0x10000)
+
+#define RNPGBE_DMA_DUMY (0x000c)
  /* chip resourse */
  #define RNPGBE_MAX_QUEUES (8)
  /* multicast control table */

diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
index 08f773199e9b..1e8360cae560 100644
--- a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c

@@ -114,6 +114,7 @@ static int rnpgbe_add_adapter(struct pci_dev *pdev,
  	hw->hw_addr = hw_addr;
  	hw->dma.dma_version = dma_version;
  	ii->get_invariants(hw);
+	hw->mbx.ops.init_params(hw);
  
  	return 0;
  

diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx.c
new file mode 100644
index 000000000000..56ace3057fea
--- /dev/null
+++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx.c

@@ -0,0 +1,623 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2022 - 2025 Mucse Corporation. */
+
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include "rnpgbe.h"
+#include "rnpgbe_mbx.h"
+#include "rnpgbe_hw.h"
+
+/**
+ * mucse_read_mbx - Reads a message from the mailbox
+ * @hw: Pointer to the HW structure
+ * @msg: The message buffer
+ * @size: Length of buffer
+ * @mbx_id: Id of vf/fw to read
+ *
+ * @return: 0 on success, negative on failure
+ **/
+int mucse_read_mbx(struct mucse_hw *hw, u32 *msg, u16 size,
+		   enum MBX_ID mbx_id)
+{
+	struct mucse_mbx_info *mbx = &hw->mbx;
+
+	/* limit read to size of mailbox */
+	if (size > mbx->size)
+		size = mbx->size;
+
+	if (!mbx->ops.read)
+		return -EIO;