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1 | /* Intel Ethernet Switch Host Interface Driver |
2 | * Copyright(c) 2013 - 2014 Intel Corporation. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * The full GNU General Public License is included in this distribution in | |
14 | * the file called "COPYING". | |
15 | * | |
16 | * Contact Information: | |
17 | * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
18 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
19 | */ | |
20 | ||
21 | #ifdef CONFIG_DEBUG_FS | |
22 | ||
23 | #include "fm10k.h" | |
24 | ||
25 | #include <linux/debugfs.h> | |
26 | #include <linux/seq_file.h> | |
27 | ||
28 | static struct dentry *dbg_root; | |
29 | ||
30 | /* Descriptor Seq Functions */ | |
31 | ||
32 | static void *fm10k_dbg_desc_seq_start(struct seq_file *s, loff_t *pos) | |
33 | { | |
34 | struct fm10k_ring *ring = s->private; | |
35 | ||
36 | return (*pos < ring->count) ? pos : NULL; | |
37 | } | |
38 | ||
39 | static void *fm10k_dbg_desc_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
40 | { | |
41 | struct fm10k_ring *ring = s->private; | |
42 | ||
43 | return (++(*pos) < ring->count) ? pos : NULL; | |
44 | } | |
45 | ||
46 | static void fm10k_dbg_desc_seq_stop(struct seq_file *s, void *v) | |
47 | { | |
48 | /* Do nothing. */ | |
49 | } | |
50 | ||
51 | static void fm10k_dbg_desc_break(struct seq_file *s, int i) | |
52 | { | |
53 | while (i--) | |
54 | seq_puts(s, "-"); | |
55 | ||
56 | seq_puts(s, "\n"); | |
57 | } | |
58 | ||
59 | static int fm10k_dbg_tx_desc_seq_show(struct seq_file *s, void *v) | |
60 | { | |
61 | struct fm10k_ring *ring = s->private; | |
62 | int i = *(loff_t *)v; | |
63 | static const char tx_desc_hdr[] = | |
64 | "DES BUFFER_ADDRESS LENGTH VLAN MSS HDRLEN FLAGS\n"; | |
65 | ||
66 | /* Generate header */ | |
67 | if (!i) { | |
68 | seq_printf(s, tx_desc_hdr); | |
69 | fm10k_dbg_desc_break(s, sizeof(tx_desc_hdr) - 1); | |
70 | } | |
71 | ||
72 | /* Validate descriptor allocation */ | |
73 | if (!ring->desc) { | |
74 | seq_printf(s, "%03X Descriptor ring not allocated.\n", i); | |
75 | } else { | |
76 | struct fm10k_tx_desc *txd = FM10K_TX_DESC(ring, i); | |
77 | ||
78 | seq_printf(s, "%03X %#018llx %#06x %#06x %#06x %#06x %#04x\n", | |
79 | i, txd->buffer_addr, txd->buflen, txd->vlan, | |
80 | txd->mss, txd->hdrlen, txd->flags); | |
81 | } | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int fm10k_dbg_rx_desc_seq_show(struct seq_file *s, void *v) | |
87 | { | |
88 | struct fm10k_ring *ring = s->private; | |
89 | int i = *(loff_t *)v; | |
90 | static const char rx_desc_hdr[] = | |
91 | "DES DATA RSS STATERR LENGTH VLAN DGLORT SGLORT TIMESTAMP\n"; | |
92 | ||
93 | /* Generate header */ | |
94 | if (!i) { | |
95 | seq_printf(s, rx_desc_hdr); | |
96 | fm10k_dbg_desc_break(s, sizeof(rx_desc_hdr) - 1); | |
97 | } | |
98 | ||
99 | /* Validate descriptor allocation */ | |
100 | if (!ring->desc) { | |
101 | seq_printf(s, "%03X Descriptor ring not allocated.\n", i); | |
102 | } else { | |
103 | union fm10k_rx_desc *rxd = FM10K_RX_DESC(ring, i); | |
104 | ||
105 | seq_printf(s, | |
106 | "%03X %#010x %#010x %#010x %#06x %#06x %#06x %#06x %#018llx\n", | |
107 | i, rxd->d.data, rxd->d.rss, rxd->d.staterr, | |
108 | rxd->w.length, rxd->w.vlan, rxd->w.dglort, | |
109 | rxd->w.sglort, rxd->q.timestamp); | |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static const struct seq_operations fm10k_dbg_tx_desc_seq_ops = { | |
116 | .start = fm10k_dbg_desc_seq_start, | |
117 | .next = fm10k_dbg_desc_seq_next, | |
118 | .stop = fm10k_dbg_desc_seq_stop, | |
119 | .show = fm10k_dbg_tx_desc_seq_show, | |
120 | }; | |
121 | ||
122 | static const struct seq_operations fm10k_dbg_rx_desc_seq_ops = { | |
123 | .start = fm10k_dbg_desc_seq_start, | |
124 | .next = fm10k_dbg_desc_seq_next, | |
125 | .stop = fm10k_dbg_desc_seq_stop, | |
126 | .show = fm10k_dbg_rx_desc_seq_show, | |
127 | }; | |
128 | ||
129 | static int fm10k_dbg_desc_open(struct inode *inode, struct file *filep) | |
130 | { | |
131 | struct fm10k_ring *ring = inode->i_private; | |
132 | struct fm10k_q_vector *q_vector = ring->q_vector; | |
133 | const struct seq_operations *desc_seq_ops; | |
134 | int err; | |
135 | ||
136 | if (ring < q_vector->rx.ring) | |
137 | desc_seq_ops = &fm10k_dbg_tx_desc_seq_ops; | |
138 | else | |
139 | desc_seq_ops = &fm10k_dbg_rx_desc_seq_ops; | |
140 | ||
141 | err = seq_open(filep, desc_seq_ops); | |
142 | if (err) | |
143 | return err; | |
144 | ||
145 | ((struct seq_file *)filep->private_data)->private = ring; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static const struct file_operations fm10k_dbg_desc_fops = { | |
151 | .owner = THIS_MODULE, | |
152 | .open = fm10k_dbg_desc_open, | |
153 | .read = seq_read, | |
154 | .llseek = seq_lseek, | |
155 | .release = seq_release, | |
156 | }; | |
157 | ||
158 | /** | |
159 | * fm10k_dbg_q_vector_init - setup debugfs for the q_vectors | |
160 | * @q_vector: q_vector to allocate directories for | |
161 | * | |
162 | * A folder is created for each q_vector found. In each q_vector | |
163 | * folder, a debugfs file is created for each tx and rx ring | |
164 | * allocated to the q_vector. | |
165 | **/ | |
166 | void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector) | |
167 | { | |
168 | struct fm10k_intfc *interface = q_vector->interface; | |
169 | char name[16]; | |
170 | int i; | |
171 | ||
172 | if (!interface->dbg_intfc) | |
173 | return; | |
174 | ||
175 | /* Generate a folder for each q_vector */ | |
176 | sprintf(name, "q_vector.%03d", q_vector->v_idx); | |
177 | ||
178 | q_vector->dbg_q_vector = debugfs_create_dir(name, interface->dbg_intfc); | |
179 | if (!q_vector->dbg_q_vector) | |
180 | return; | |
181 | ||
182 | /* Generate a file for each rx ring in the q_vector */ | |
183 | for (i = 0; i < q_vector->tx.count; i++) { | |
184 | struct fm10k_ring *ring = &q_vector->tx.ring[i]; | |
185 | ||
186 | sprintf(name, "tx_ring.%03d", ring->queue_index); | |
187 | ||
188 | debugfs_create_file(name, 0600, | |
189 | q_vector->dbg_q_vector, ring, | |
190 | &fm10k_dbg_desc_fops); | |
191 | } | |
192 | ||
193 | /* Generate a file for each rx ring in the q_vector */ | |
194 | for (i = 0; i < q_vector->rx.count; i++) { | |
195 | struct fm10k_ring *ring = &q_vector->rx.ring[i]; | |
196 | ||
197 | sprintf(name, "rx_ring.%03d", ring->queue_index); | |
198 | ||
199 | debugfs_create_file(name, 0600, | |
200 | q_vector->dbg_q_vector, ring, | |
201 | &fm10k_dbg_desc_fops); | |
202 | } | |
203 | } | |
204 | ||
205 | /** | |
206 | * fm10k_dbg_free_q_vector_dir - setup debugfs for the q_vectors | |
207 | * @q_vector: q_vector to allocate directories for | |
208 | **/ | |
209 | void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector) | |
210 | { | |
211 | struct fm10k_intfc *interface = q_vector->interface; | |
212 | ||
213 | if (interface->dbg_intfc) | |
214 | debugfs_remove_recursive(q_vector->dbg_q_vector); | |
215 | q_vector->dbg_q_vector = NULL; | |
216 | } | |
217 | ||
218 | /** | |
219 | * fm10k_dbg_intfc_init - setup the debugfs directory for the intferface | |
220 | * @interface: the interface that is starting up | |
221 | **/ | |
222 | ||
223 | void fm10k_dbg_intfc_init(struct fm10k_intfc *interface) | |
224 | { | |
225 | const char *name = pci_name(interface->pdev); | |
226 | ||
227 | if (dbg_root) | |
228 | interface->dbg_intfc = debugfs_create_dir(name, dbg_root); | |
229 | } | |
230 | ||
231 | /** | |
232 | * fm10k_dbg_intfc_exit - clean out the interface's debugfs entries | |
233 | * @interface: the interface that is stopping | |
234 | **/ | |
235 | void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface) | |
236 | { | |
237 | if (dbg_root) | |
238 | debugfs_remove_recursive(interface->dbg_intfc); | |
239 | interface->dbg_intfc = NULL; | |
240 | } | |
241 | ||
242 | /** | |
243 | * fm10k_dbg_init - start up debugfs for the driver | |
244 | **/ | |
245 | void fm10k_dbg_init(void) | |
246 | { | |
247 | dbg_root = debugfs_create_dir(fm10k_driver_name, NULL); | |
248 | } | |
249 | ||
250 | /** | |
251 | * fm10k_dbg_exit - clean out the driver's debugfs entries | |
252 | **/ | |
253 | void fm10k_dbg_exit(void) | |
254 | { | |
255 | debugfs_remove_recursive(dbg_root); | |
256 | dbg_root = NULL; | |
257 | } | |
258 | ||
259 | #endif /* CONFIG_DEBUG_FS */ |