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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2018 Intel Corporation. */
3
4#include "fm10k.h"
5
6#include <linux/debugfs.h>
7#include <linux/seq_file.h>
8
9static struct dentry *dbg_root;
10
11/* Descriptor Seq Functions */
12
13static void *fm10k_dbg_desc_seq_start(struct seq_file *s, loff_t *pos)
14{
15 struct fm10k_ring *ring = s->private;
16
17 return (*pos < ring->count) ? pos : NULL;
18}
19
20static void *fm10k_dbg_desc_seq_next(struct seq_file *s,
21 void __always_unused *v,
22 loff_t *pos)
23{
24 struct fm10k_ring *ring = s->private;
25
26 return (++(*pos) < ring->count) ? pos : NULL;
27}
28
29static void fm10k_dbg_desc_seq_stop(struct seq_file __always_unused *s,
30 void __always_unused *v)
31{
32 /* Do nothing. */
33}
34
35static void fm10k_dbg_desc_break(struct seq_file *s, int i)
36{
37 while (i--)
38 seq_putc(s, '-');
39
40 seq_putc(s, '\n');
41}
42
43static int fm10k_dbg_tx_desc_seq_show(struct seq_file *s, void *v)
44{
45 struct fm10k_ring *ring = s->private;
46 int i = *(loff_t *)v;
47 static const char tx_desc_hdr[] =
48 "DES BUFFER_ADDRESS LENGTH VLAN MSS HDRLEN FLAGS\n";
49
50 /* Generate header */
51 if (!i) {
52 seq_printf(s, tx_desc_hdr);
53 fm10k_dbg_desc_break(s, sizeof(tx_desc_hdr) - 1);
54 }
55
56 /* Validate descriptor allocation */
57 if (!ring->desc) {
58 seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
59 } else {
60 struct fm10k_tx_desc *txd = FM10K_TX_DESC(ring, i);
61
62 seq_printf(s, "%03X %#018llx %#06x %#06x %#06x %#06x %#04x\n",
63 i, txd->buffer_addr, txd->buflen, txd->vlan,
64 txd->mss, txd->hdrlen, txd->flags);
65 }
66
67 return 0;
68}
69
70static int fm10k_dbg_rx_desc_seq_show(struct seq_file *s, void *v)
71{
72 struct fm10k_ring *ring = s->private;
73 int i = *(loff_t *)v;
74 static const char rx_desc_hdr[] =
75 "DES DATA RSS STATERR LENGTH VLAN DGLORT SGLORT TIMESTAMP\n";
76
77 /* Generate header */
78 if (!i) {
79 seq_printf(s, rx_desc_hdr);
80 fm10k_dbg_desc_break(s, sizeof(rx_desc_hdr) - 1);
81 }
82
83 /* Validate descriptor allocation */
84 if (!ring->desc) {
85 seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
86 } else {
87 union fm10k_rx_desc *rxd = FM10K_RX_DESC(ring, i);
88
89 seq_printf(s,
90 "%03X %#010x %#010x %#010x %#06x %#06x %#06x %#06x %#018llx\n",
91 i, rxd->d.data, rxd->d.rss, rxd->d.staterr,
92 rxd->w.length, rxd->w.vlan, rxd->w.dglort,
93 rxd->w.sglort, rxd->q.timestamp);
94 }
95
96 return 0;
97}
98
99static const struct seq_operations fm10k_dbg_tx_desc_seq_ops = {
100 .start = fm10k_dbg_desc_seq_start,
101 .next = fm10k_dbg_desc_seq_next,
102 .stop = fm10k_dbg_desc_seq_stop,
103 .show = fm10k_dbg_tx_desc_seq_show,
104};
105
106static const struct seq_operations fm10k_dbg_rx_desc_seq_ops = {
107 .start = fm10k_dbg_desc_seq_start,
108 .next = fm10k_dbg_desc_seq_next,
109 .stop = fm10k_dbg_desc_seq_stop,
110 .show = fm10k_dbg_rx_desc_seq_show,
111};
112
113static int fm10k_dbg_desc_open(struct inode *inode, struct file *filep)
114{
115 struct fm10k_ring *ring = inode->i_private;
116 struct fm10k_q_vector *q_vector = ring->q_vector;
117 const struct seq_operations *desc_seq_ops;
118 int err;
119
120 if (ring < q_vector->rx.ring)
121 desc_seq_ops = &fm10k_dbg_tx_desc_seq_ops;
122 else
123 desc_seq_ops = &fm10k_dbg_rx_desc_seq_ops;
124
125 err = seq_open(filep, desc_seq_ops);
126 if (err)
127 return err;
128
129 ((struct seq_file *)filep->private_data)->private = ring;
130
131 return 0;
132}
133
134static const struct file_operations fm10k_dbg_desc_fops = {
135 .owner = THIS_MODULE,
136 .open = fm10k_dbg_desc_open,
137 .read = seq_read,
138 .llseek = seq_lseek,
139 .release = seq_release,
140};
141
142/**
143 * fm10k_dbg_q_vector_init - setup debugfs for the q_vectors
144 * @q_vector: q_vector to allocate directories for
145 *
146 * A folder is created for each q_vector found. In each q_vector
147 * folder, a debugfs file is created for each tx and rx ring
148 * allocated to the q_vector.
149 **/
150void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector)
151{
152 struct fm10k_intfc *interface = q_vector->interface;
153 char name[16];
154 int i;
155
156 if (!interface->dbg_intfc)
157 return;
158
159 /* Generate a folder for each q_vector */
160 snprintf(name, sizeof(name), "q_vector.%03d", q_vector->v_idx);
161
162 q_vector->dbg_q_vector = debugfs_create_dir(name, interface->dbg_intfc);
163
164 /* Generate a file for each rx ring in the q_vector */
165 for (i = 0; i < q_vector->tx.count; i++) {
166 struct fm10k_ring *ring = &q_vector->tx.ring[i];
167
168 snprintf(name, sizeof(name), "tx_ring.%03d", ring->queue_index);
169
170 debugfs_create_file(name, 0600,
171 q_vector->dbg_q_vector, ring,
172 &fm10k_dbg_desc_fops);
173 }
174
175 /* Generate a file for each rx ring in the q_vector */
176 for (i = 0; i < q_vector->rx.count; i++) {
177 struct fm10k_ring *ring = &q_vector->rx.ring[i];
178
179 snprintf(name, sizeof(name), "rx_ring.%03d", ring->queue_index);
180
181 debugfs_create_file(name, 0600,
182 q_vector->dbg_q_vector, ring,
183 &fm10k_dbg_desc_fops);
184 }
185}
186
187/**
188 * fm10k_dbg_q_vector_exit - setup debugfs for the q_vectors
189 * @q_vector: q_vector to allocate directories for
190 **/
191void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector)
192{
193 struct fm10k_intfc *interface = q_vector->interface;
194
195 if (interface->dbg_intfc)
196 debugfs_remove_recursive(q_vector->dbg_q_vector);
197 q_vector->dbg_q_vector = NULL;
198}
199
200/**
201 * fm10k_dbg_intfc_init - setup the debugfs directory for the intferface
202 * @interface: the interface that is starting up
203 **/
204
205void fm10k_dbg_intfc_init(struct fm10k_intfc *interface)
206{
207 const char *name = pci_name(interface->pdev);
208
209 if (dbg_root)
210 interface->dbg_intfc = debugfs_create_dir(name, dbg_root);
211}
212
213/**
214 * fm10k_dbg_intfc_exit - clean out the interface's debugfs entries
215 * @interface: the interface that is stopping
216 **/
217void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface)
218{
219 if (dbg_root)
220 debugfs_remove_recursive(interface->dbg_intfc);
221 interface->dbg_intfc = NULL;
222}
223
224/**
225 * fm10k_dbg_init - start up debugfs for the driver
226 **/
227void fm10k_dbg_init(void)
228{
229 dbg_root = debugfs_create_dir(fm10k_driver_name, NULL);
230}
231
232/**
233 * fm10k_dbg_exit - clean out the driver's debugfs entries
234 **/
235void fm10k_dbg_exit(void)
236{
237 debugfs_remove_recursive(dbg_root);
238 dbg_root = NULL;
239}