Commit | Line | Data |
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2aec85b2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
fc4ecaee | 2 | /* |
8f4c0e01 | 3 | * debugfs code for HSR & PRP |
32712733 | 4 | * Copyright (C) 2019 Texas Instruments Incorporated |
fc4ecaee MK |
5 | * |
6 | * Author(s): | |
32712733 | 7 | * Murali Karicheri <m-karicheri2@ti.com> |
fc4ecaee MK |
8 | */ |
9 | #include <linux/module.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/debugfs.h> | |
4acc45db | 12 | #include <linux/jhash.h> |
fc4ecaee MK |
13 | #include "hsr_main.h" |
14 | #include "hsr_framereg.h" | |
15 | ||
c6c4ccd7 TY |
16 | static struct dentry *hsr_debugfs_root_dir; |
17 | ||
9c5f8a19 | 18 | /* hsr_node_table_show - Formats and prints node_table entries */ |
fc4ecaee | 19 | static int |
9c5f8a19 | 20 | hsr_node_table_show(struct seq_file *sfp, void *data) |
fc4ecaee MK |
21 | { |
22 | struct hsr_priv *priv = (struct hsr_priv *)sfp->private; | |
23 | struct hsr_node *node; | |
4acc45db | 24 | int i; |
fc4ecaee | 25 | |
795ec4f5 MK |
26 | seq_printf(sfp, "Node Table entries for (%s) device\n", |
27 | (priv->prot_version == PRP_V1 ? "PRP" : "HSR")); | |
28 | seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], "); | |
29 | seq_puts(sfp, "time_in[B], Address-B port, "); | |
30 | if (priv->prot_version == PRP_V1) | |
31 | seq_puts(sfp, "SAN-A, SAN-B, DAN-P\n"); | |
32 | else | |
33 | seq_puts(sfp, "DAN-H\n"); | |
34 | ||
fc4ecaee | 35 | rcu_read_lock(); |
795ec4f5 | 36 | |
4acc45db JK |
37 | for (i = 0 ; i < priv->hash_buckets; i++) { |
38 | hlist_for_each_entry_rcu(node, &priv->node_db[i], mac_list) { | |
39 | /* skip self node */ | |
40 | if (hsr_addr_is_self(priv, node->macaddress_A)) | |
41 | continue; | |
42 | seq_printf(sfp, "%pM ", &node->macaddress_A[0]); | |
43 | seq_printf(sfp, "%pM ", &node->macaddress_B[0]); | |
44 | seq_printf(sfp, "%10lx, ", | |
45 | node->time_in[HSR_PT_SLAVE_A]); | |
46 | seq_printf(sfp, "%10lx, ", | |
47 | node->time_in[HSR_PT_SLAVE_B]); | |
48 | seq_printf(sfp, "%14x, ", node->addr_B_port); | |
49 | ||
50 | if (priv->prot_version == PRP_V1) | |
51 | seq_printf(sfp, "%5x, %5x, %5x\n", | |
52 | node->san_a, node->san_b, | |
53 | (node->san_a == 0 && | |
54 | node->san_b == 0)); | |
55 | else | |
56 | seq_printf(sfp, "%5x\n", 1); | |
57 | } | |
fc4ecaee MK |
58 | } |
59 | rcu_read_unlock(); | |
60 | return 0; | |
61 | } | |
62 | ||
2170ff08 | 63 | DEFINE_SHOW_ATTRIBUTE(hsr_node_table); |
fc4ecaee | 64 | |
4c2d5e33 TY |
65 | void hsr_debugfs_rename(struct net_device *dev) |
66 | { | |
67 | struct hsr_priv *priv = netdev_priv(dev); | |
68 | struct dentry *d; | |
69 | ||
70 | d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root, | |
71 | hsr_debugfs_root_dir, dev->name); | |
72 | if (IS_ERR(d)) | |
73 | netdev_warn(dev, "failed to rename\n"); | |
74 | else | |
75 | priv->node_tbl_root = d; | |
76 | } | |
77 | ||
9c5f8a19 | 78 | /* hsr_debugfs_init - create hsr node_table file for dumping |
fc4ecaee MK |
79 | * the node table |
80 | * | |
81 | * Description: | |
82 | * When debugfs is configured this routine sets up the node_table file per | |
9c5f8a19 | 83 | * hsr device for dumping the node_table entries |
fc4ecaee | 84 | */ |
1d19e2d5 | 85 | void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev) |
fc4ecaee | 86 | { |
fc4ecaee MK |
87 | struct dentry *de = NULL; |
88 | ||
c6c4ccd7 | 89 | de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir); |
1d19e2d5 | 90 | if (IS_ERR(de)) { |
c6c4ccd7 | 91 | pr_err("Cannot create hsr debugfs directory\n"); |
1d19e2d5 | 92 | return; |
fc4ecaee MK |
93 | } |
94 | ||
95 | priv->node_tbl_root = de; | |
96 | ||
97 | de = debugfs_create_file("node_table", S_IFREG | 0444, | |
98 | priv->node_tbl_root, priv, | |
2170ff08 | 99 | &hsr_node_table_fops); |
1d19e2d5 | 100 | if (IS_ERR(de)) { |
c6c4ccd7 | 101 | pr_err("Cannot create hsr node_table file\n"); |
1d19e2d5 TY |
102 | debugfs_remove(priv->node_tbl_root); |
103 | priv->node_tbl_root = NULL; | |
104 | return; | |
fc4ecaee | 105 | } |
fc4ecaee MK |
106 | } |
107 | ||
9c5f8a19 | 108 | /* hsr_debugfs_term - Tear down debugfs intrastructure |
fc4ecaee MK |
109 | * |
110 | * Description: | |
7f1330c1 | 111 | * When Debugfs is configured this routine removes debugfs file system |
9c5f8a19 | 112 | * elements that are specific to hsr |
fc4ecaee MK |
113 | */ |
114 | void | |
9c5f8a19 | 115 | hsr_debugfs_term(struct hsr_priv *priv) |
fc4ecaee | 116 | { |
f3f2f984 | 117 | debugfs_remove_recursive(priv->node_tbl_root); |
fc4ecaee MK |
118 | priv->node_tbl_root = NULL; |
119 | } | |
c6c4ccd7 TY |
120 | |
121 | void hsr_debugfs_create_root(void) | |
122 | { | |
123 | hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL); | |
124 | if (IS_ERR(hsr_debugfs_root_dir)) { | |
125 | pr_err("Cannot create hsr debugfs root directory\n"); | |
126 | hsr_debugfs_root_dir = NULL; | |
127 | } | |
128 | } | |
129 | ||
130 | void hsr_debugfs_remove_root(void) | |
131 | { | |
132 | /* debugfs_remove() internally checks NULL and ERROR */ | |
133 | debugfs_remove(hsr_debugfs_root_dir); | |
134 | } |