Commit 1b7f85f7 authored by Dong Yibo's avatar Dong Yibo Committed by Jakub Kicinski
Browse files

net: rnpgbe: Add n500/n210 chip support with BAR2 mapping 



Add hardware initialization foundation for MUCSE 1Gbe controller,
including:
1. Map PCI BAR2 as hardware register base;
2. Bind PCI device to driver private data (struct mucse) and
   initialize hardware context (struct mucse_hw);
3. Reserve board-specific init framework via rnpgbe_init_hw.

Signed-off-by: default avatarDong Yibo <dong100@mucse.com>
Reviewed-by: default avatarVadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: default avatarMD Danish Anwar <danishanwar@ti.com>
Link: https://patch.msgid.link/20251101013849.120565-3-dong100@mucse.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ee61c10c

drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h

+10 −0
Original line number Diff line number Diff line
@@ -9,6 +9,16 @@ enum rnpgbe_boards { 
	board_n210

};



struct mucse_hw {

	void __iomem *hw_addr;

};



struct mucse {

	struct net_device *netdev;

	struct pci_dev *pdev;

	struct mucse_hw hw;

};



/* Device IDs */

#define PCI_VENDOR_ID_MUCSE               0x8848

#define RNPGBE_DEVICE_ID_N500_QUAD_PORT   0x8308

drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h

0 → 100644
+8 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/* Copyright(c) 2020 - 2025 Mucse Corporation. */



#ifndef _RNPGBE_HW_H

#define _RNPGBE_HW_H



#define RNPGBE_MAX_QUEUES 8

#endif /* _RNPGBE_HW_H */

drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c

+80 −0
Original line number Diff line number Diff line
@@ -2,8 +2,11 @@ 
/* Copyright(c) 2020 - 2025 Mucse Corporation. */



#include <linux/pci.h>

#include <net/rtnetlink.h>

#include <linux/etherdevice.h>



#include "rnpgbe.h"

#include "rnpgbe_hw.h"



static const char rnpgbe_driver_name[] = "rnpgbe";
@@ -21,6 +24,54 @@ static struct pci_device_id rnpgbe_pci_tbl[] = { 
	{0, },

};



/**

 * rnpgbe_add_adapter - Add netdev for this pci_dev

 * @pdev: PCI device information structure

 * @board_type: board type

 *

 * rnpgbe_add_adapter initializes a netdev for this pci_dev

 * structure. Initializes Bar map, private structure, and a

 * hardware reset occur.

 *

 * Return: 0 on success, negative errno on failure

 **/

static int rnpgbe_add_adapter(struct pci_dev *pdev,

			      int board_type)

{

	struct net_device *netdev;

	void __iomem *hw_addr;

	struct mucse *mucse;

	struct mucse_hw *hw;

	int err;



	netdev = alloc_etherdev_mq(sizeof(struct mucse), RNPGBE_MAX_QUEUES);

	if (!netdev)

		return -ENOMEM;



	SET_NETDEV_DEV(netdev, &pdev->dev);

	mucse = netdev_priv(netdev);

	mucse->netdev = netdev;

	mucse->pdev = pdev;

	pci_set_drvdata(pdev, mucse);



	hw = &mucse->hw;

	hw_addr = devm_ioremap(&pdev->dev,

			       pci_resource_start(pdev, 2),

			       pci_resource_len(pdev, 2));

	if (!hw_addr) {

		err = -EIO;

		goto err_free_net;

	}



	hw->hw_addr = hw_addr;



	return 0;



err_free_net:

	free_netdev(netdev);

	return err;

}



/**

 * rnpgbe_probe - Device initialization routine

 * @pdev: PCI device information struct
@@ -33,6 +84,7 @@ static struct pci_device_id rnpgbe_pci_tbl[] = { 
 **/

static int rnpgbe_probe(struct pci_dev *pdev, const struct pci_device_id *id)

{

	int board_type = id->driver_data;

	int err;



	err = pci_enable_device_mem(pdev);
@@ -60,6 +112,10 @@ static int rnpgbe_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
		goto err_free_regions;

	}



	err = rnpgbe_add_adapter(pdev, board_type);

	if (err)

		goto err_free_regions;



	return 0;

err_free_regions:

	pci_release_mem_regions(pdev);
@@ -68,6 +124,23 @@ static int rnpgbe_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
	return err;

}



/**

 * rnpgbe_rm_adapter - Remove netdev for this mucse structure

 * @pdev: PCI device information struct

 *

 * rnpgbe_rm_adapter remove a netdev for this mucse structure

 **/

static void rnpgbe_rm_adapter(struct pci_dev *pdev)

{

	struct mucse *mucse = pci_get_drvdata(pdev);

	struct net_device *netdev;



	if (!mucse)

		return;

	netdev = mucse->netdev;

	free_netdev(netdev);

}



/**

 * rnpgbe_remove - Device removal routine

 * @pdev: PCI device information struct
@@ -79,6 +152,7 @@ static int rnpgbe_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
 **/

static void rnpgbe_remove(struct pci_dev *pdev)

{

	rnpgbe_rm_adapter(pdev);

	pci_release_mem_regions(pdev);

	pci_disable_device(pdev);

}
@@ -89,6 +163,12 @@ static void rnpgbe_remove(struct pci_dev *pdev) 
 **/

static void rnpgbe_dev_shutdown(struct pci_dev *pdev)

{

	struct mucse *mucse = pci_get_drvdata(pdev);

	struct net_device *netdev = mucse->netdev;



	rtnl_lock();

	netif_device_detach(netdev);

	rtnl_unlock();

	pci_disable_device(pdev);

}