1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */
3
4 #include <linux/types.h>
5 #include <linux/module.h>
6 #include <linux/pci.h>
7 #include <linux/netdevice.h>
8 #include <linux/string.h>
9 #include <linux/aer.h>
10 #include <linux/etherdevice.h>
11
12 #include "txgbe.h"
13
14 char txgbe_driver_name[] = "txgbe";
15
16 /* txgbe_pci_tbl - PCI Device ID Table
17 *
18 * Wildcard entries (PCI_ANY_ID) should come last
19 * Last entry must be all 0s
20 *
21 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
22 * Class, Class Mask, private data (not used) }
23 */
24 static const struct pci_device_id txgbe_pci_tbl[] = {
25 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_SP1000), 0},
26 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_WX1820), 0},
27 /* required last entry */
28 { .device = 0 }
29 };
30
31 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
32
txgbe_dev_shutdown(struct pci_dev * pdev,bool * enable_wake)33 static void txgbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
34 {
35 struct txgbe_adapter *adapter = pci_get_drvdata(pdev);
36 struct net_device *netdev = adapter->netdev;
37
38 netif_device_detach(netdev);
39
40 pci_disable_device(pdev);
41 }
42
txgbe_shutdown(struct pci_dev * pdev)43 static void txgbe_shutdown(struct pci_dev *pdev)
44 {
45 bool wake;
46
47 txgbe_dev_shutdown(pdev, &wake);
48
49 if (system_state == SYSTEM_POWER_OFF) {
50 pci_wake_from_d3(pdev, wake);
51 pci_set_power_state(pdev, PCI_D3hot);
52 }
53 }
54
55 /**
56 * txgbe_probe - Device Initialization Routine
57 * @pdev: PCI device information struct
58 * @ent: entry in txgbe_pci_tbl
59 *
60 * Returns 0 on success, negative on failure
61 *
62 * txgbe_probe initializes an adapter identified by a pci_dev structure.
63 * The OS initialization, configuring of the adapter private structure,
64 * and a hardware reset occur.
65 **/
txgbe_probe(struct pci_dev * pdev,const struct pci_device_id __always_unused * ent)66 static int txgbe_probe(struct pci_dev *pdev,
67 const struct pci_device_id __always_unused *ent)
68 {
69 struct txgbe_adapter *adapter = NULL;
70 struct net_device *netdev;
71 int err;
72
73 err = pci_enable_device_mem(pdev);
74 if (err)
75 return err;
76
77 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
78 if (err) {
79 dev_err(&pdev->dev,
80 "No usable DMA configuration, aborting\n");
81 goto err_pci_disable_dev;
82 }
83
84 err = pci_request_selected_regions(pdev,
85 pci_select_bars(pdev, IORESOURCE_MEM),
86 txgbe_driver_name);
87 if (err) {
88 dev_err(&pdev->dev,
89 "pci_request_selected_regions failed 0x%x\n", err);
90 goto err_pci_disable_dev;
91 }
92
93 pci_enable_pcie_error_reporting(pdev);
94 pci_set_master(pdev);
95
96 netdev = devm_alloc_etherdev_mqs(&pdev->dev,
97 sizeof(struct txgbe_adapter),
98 TXGBE_MAX_TX_QUEUES,
99 TXGBE_MAX_RX_QUEUES);
100 if (!netdev) {
101 err = -ENOMEM;
102 goto err_pci_release_regions;
103 }
104
105 SET_NETDEV_DEV(netdev, &pdev->dev);
106
107 adapter = netdev_priv(netdev);
108 adapter->netdev = netdev;
109 adapter->pdev = pdev;
110
111 adapter->io_addr = devm_ioremap(&pdev->dev,
112 pci_resource_start(pdev, 0),
113 pci_resource_len(pdev, 0));
114 if (!adapter->io_addr) {
115 err = -EIO;
116 goto err_pci_release_regions;
117 }
118
119 netdev->features |= NETIF_F_HIGHDMA;
120
121 pci_set_drvdata(pdev, adapter);
122
123 return 0;
124
125 err_pci_release_regions:
126 pci_disable_pcie_error_reporting(pdev);
127 pci_release_selected_regions(pdev,
128 pci_select_bars(pdev, IORESOURCE_MEM));
129 err_pci_disable_dev:
130 pci_disable_device(pdev);
131 return err;
132 }
133
134 /**
135 * txgbe_remove - Device Removal Routine
136 * @pdev: PCI device information struct
137 *
138 * txgbe_remove is called by the PCI subsystem to alert the driver
139 * that it should release a PCI device. The could be caused by a
140 * Hot-Plug event, or because the driver is going to be removed from
141 * memory.
142 **/
txgbe_remove(struct pci_dev * pdev)143 static void txgbe_remove(struct pci_dev *pdev)
144 {
145 pci_release_selected_regions(pdev,
146 pci_select_bars(pdev, IORESOURCE_MEM));
147
148 pci_disable_pcie_error_reporting(pdev);
149
150 pci_disable_device(pdev);
151 }
152
153 static struct pci_driver txgbe_driver = {
154 .name = txgbe_driver_name,
155 .id_table = txgbe_pci_tbl,
156 .probe = txgbe_probe,
157 .remove = txgbe_remove,
158 .shutdown = txgbe_shutdown,
159 };
160
161 module_pci_driver(txgbe_driver);
162
163 MODULE_DEVICE_TABLE(pci, txgbe_pci_tbl);
164 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@trustnetic.com>");
165 MODULE_DESCRIPTION("WangXun(R) 10 Gigabit PCI Express Network Driver");
166 MODULE_LICENSE("GPL");
167
