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/*
* Huawei HiNIC PCI Express Linux driver
* Copyright(c) 2017 Huawei Technologies Co., Ltd
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/err.h>
#include "hinic_hw_dev.h"
#include "hinic_dev.h"
MODULE_AUTHOR("Huawei Technologies CO., Ltd");
MODULE_DESCRIPTION("Huawei Intelligent NIC driver");
MODULE_LICENSE("GPL");
#define PCI_DEVICE_ID_HI1822_PF 0x1822
#define MSG_ENABLE_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
NETIF_MSG_IFUP | \
NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR)
static const struct net_device_ops hinic_netdev_ops = {
/* Operations are empty, should be filled */
};
/**
* nic_dev_init - Initialize the NIC device
* @pdev: the NIC pci device
*
* Return 0 - Success, negative - Failure
**/
static int nic_dev_init(struct pci_dev *pdev)
{
struct hinic_dev *nic_dev;
struct net_device *netdev;
struct hinic_hwdev *hwdev;
int err, num_qps;
hwdev = hinic_init_hwdev(pdev);
if (IS_ERR(hwdev)) {
dev_err(&pdev->dev, "Failed to initialize HW device\n");
return PTR_ERR(hwdev);
}
num_qps = hinic_hwdev_num_qps(hwdev);
if (num_qps <= 0) {
dev_err(&pdev->dev, "Invalid number of QPS\n");
err = -EINVAL;
goto err_num_qps;
}
netdev = alloc_etherdev_mq(sizeof(*nic_dev), num_qps);
if (!netdev) {
dev_err(&pdev->dev, "Failed to allocate Ethernet device\n");
err = -ENOMEM;
goto err_alloc_etherdev;
}
netdev->netdev_ops = &hinic_netdev_ops;
nic_dev = netdev_priv(netdev);
nic_dev->netdev = netdev;
nic_dev->hwdev = hwdev;
nic_dev->msg_enable = MSG_ENABLE_DEFAULT;
pci_set_drvdata(pdev, netdev);
netif_carrier_off(netdev);
err = register_netdev(netdev);
if (err) {
dev_err(&pdev->dev, "Failed to register netdev\n");
goto err_reg_netdev;
}
return 0;
err_reg_netdev:
pci_set_drvdata(pdev, NULL);
free_netdev(netdev);
err_alloc_etherdev:
err_num_qps:
hinic_free_hwdev(hwdev);
return err;
}
static int hinic_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Failed to enable PCI device\n");
return err;
}
err = pci_request_regions(pdev, HINIC_DRV_NAME);
if (err) {
dev_err(&pdev->dev, "Failed to request PCI regions\n");
goto err_pci_regions;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev, "Couldn't set 64-bit DMA mask\n");
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Failed to set DMA mask\n");
goto err_dma_mask;
}
}
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev,
"Couldn't set 64-bit consistent DMA mask\n");
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev,
"Failed to set consistent DMA mask\n");
goto err_dma_consistent_mask;
}
}
err = nic_dev_init(pdev);
if (err) {
dev_err(&pdev->dev, "Failed to initialize NIC device\n");
goto err_nic_dev_init;
}
dev_info(&pdev->dev, "HiNIC driver - probed\n");
return 0;
err_nic_dev_init:
err_dma_consistent_mask:
err_dma_mask:
pci_release_regions(pdev);
err_pci_regions:
pci_disable_device(pdev);
return err;
}
static void hinic_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct hinic_dev *nic_dev = netdev_priv(netdev);
unregister_netdev(netdev);
pci_set_drvdata(pdev, NULL);
hinic_free_hwdev(nic_dev->hwdev);
free_netdev(netdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_info(&pdev->dev, "HiNIC driver - removed\n");
}
static const struct pci_device_id hinic_pci_table[] = {
{ PCI_VDEVICE(HUAWEI, PCI_DEVICE_ID_HI1822_PF), 0},
{ 0, 0}
};
MODULE_DEVICE_TABLE(pci, hinic_pci_table);
static struct pci_driver hinic_driver = {
.name = HINIC_DRV_NAME,
.id_table = hinic_pci_table,
.probe = hinic_probe,
.remove = hinic_remove,
};
module_pci_driver(hinic_driver);
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