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 
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 
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  **/
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_release_selected_regions(pdev,
127 				     pci_select_bars(pdev, IORESOURCE_MEM));
128 err_pci_disable_dev:
129 	pci_disable_device(pdev);
130 	return err;
131 }
132 
133 /**
134  * txgbe_remove - Device Removal Routine
135  * @pdev: PCI device information struct
136  *
137  * txgbe_remove is called by the PCI subsystem to alert the driver
138  * that it should release a PCI device.  The could be caused by a
139  * Hot-Plug event, or because the driver is going to be removed from
140  * memory.
141  **/
142 static void txgbe_remove(struct pci_dev *pdev)
143 {
144 	pci_release_selected_regions(pdev,
145 				     pci_select_bars(pdev, IORESOURCE_MEM));
146 
147 	pci_disable_pcie_error_reporting(pdev);
148 
149 	pci_disable_device(pdev);
150 }
151 
152 static struct pci_driver txgbe_driver = {
153 	.name     = txgbe_driver_name,
154 	.id_table = txgbe_pci_tbl,
155 	.probe    = txgbe_probe,
156 	.remove   = txgbe_remove,
157 	.shutdown = txgbe_shutdown,
158 };
159 
160 module_pci_driver(txgbe_driver);
161 
162 MODULE_DEVICE_TABLE(pci, txgbe_pci_tbl);
163 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@trustnetic.com>");
164 MODULE_DESCRIPTION("WangXun(R) 10 Gigabit PCI Express Network Driver");
165 MODULE_LICENSE("GPL");
166