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

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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: Dong Yibo <dong100@mucse.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://patch.msgid.link/20251101013849.120565-3-dong100@mucse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dong Yibo
2025-11-01 09:38:46 +08:00
committed by Jakub Kicinski
parent ee61c10cd4
commit 1b7f85f733
3 changed files with 98 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/ethernet/mucse/rnpgbe/rnpgbe.h
View File

@@ -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

8
drivers/net/ethernet/mucse/rnpgbe/rnpgbe_hw.h Normal file
View File

@@ -0,0 +1,8 @@
/* 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 */

80
drivers/net/ethernet/mucse/rnpgbe/rnpgbe_main.c
View File

@@ -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 @@ err_disable_dev:
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 @@ err_disable_dev:
**/
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);
}