1/*
  2 * Copyright (c) 2013 - 2017 Intel Corporation.  All rights reserved.
  3 *
  4 * This software is available to you under a choice of one of two
  5 * licenses.  You may choose to be licensed under the terms of the GNU
  6 * General Public License (GPL) Version 2, available from the file
  7 * COPYING in the main directory of this source tree, or the
  8 * OpenIB.org BSD license below:
  9 *
 10 *     Redistribution and use in source and binary forms, with or
 11 *     without modification, are permitted provided that the following
 12 *     conditions are met:
 13 *
 14 *      - Redistributions of source code must retain the above
 15 *        copyright notice, this list of conditions and the following
 16 *        disclaimer.
 17 *
 18 *      - Redistributions in binary form must reproduce the above
 19 *        copyright notice, this list of conditions and the following
 20 *        disclaimer in the documentation and/or other materials
 21 *        provided with the distribution.
 22 *
 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30 * SOFTWARE.
 31 */
 32#include <linux/debugfs.h>
 33#include <linux/seq_file.h>
 34#include <linux/kernel.h>
 35#include <linux/export.h>
 36
 37#include "qib.h"
 38#include "qib_verbs.h"
 39#include "qib_debugfs.h"
 40
 41static struct dentry *qib_dbg_root;
 42
 43#define DEBUGFS_FILE(name) \
 44static const struct seq_operations _##name##_seq_ops = { \
 45	.start = _##name##_seq_start, \
 46	.next  = _##name##_seq_next, \
 47	.stop  = _##name##_seq_stop, \
 48	.show  = _##name##_seq_show \
 49}; \
 50static int _##name##_open(struct inode *inode, struct file *s) \
 51{ \
 52	struct seq_file *seq; \
 53	int ret; \
 54	ret =  seq_open(s, &_##name##_seq_ops); \
 55	if (ret) \
 56		return ret; \
 57	seq = s->private_data; \
 58	seq->private = inode->i_private; \
 59	return 0; \
 60} \
 61static const struct file_operations _##name##_file_ops = { \
 62	.owner   = THIS_MODULE, \
 63	.open    = _##name##_open, \
 64	.read    = seq_read, \
 65	.llseek  = seq_lseek, \
 66	.release = seq_release \
 67};
 68
 69static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
 70{
 71	struct qib_opcode_stats_perctx *opstats;
 72
 73	if (*pos >= ARRAY_SIZE(opstats->stats))
 74		return NULL;
 75	return pos;
 76}
 77
 78static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
 79{
 80	struct qib_opcode_stats_perctx *opstats;
 81
 82	++*pos;
 83	if (*pos >= ARRAY_SIZE(opstats->stats))
 84		return NULL;
 85	return pos;
 86}
 87
 88
 89static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
 90{
 91	/* nothing allocated */
 92}
 93
 94static int _opcode_stats_seq_show(struct seq_file *s, void *v)
 95{
 96	loff_t *spos = v;
 97	loff_t i = *spos, j;
 98	u64 n_packets = 0, n_bytes = 0;
 99	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
100	struct qib_devdata *dd = dd_from_dev(ibd);
101
102	for (j = 0; j < dd->first_user_ctxt; j++) {
103		if (!dd->rcd[j])
104			continue;
105		n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
106		n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
107	}
108	if (!n_packets && !n_bytes)
109		return SEQ_SKIP;
110	seq_printf(s, "%02llx %llu/%llu\n", i,
111		(unsigned long long) n_packets,
112		(unsigned long long) n_bytes);
113
114	return 0;
115}
116
117DEBUGFS_FILE(opcode_stats)
118
119static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
120{
121	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
122	struct qib_devdata *dd = dd_from_dev(ibd);
123
124	if (!*pos)
125		return SEQ_START_TOKEN;
126	if (*pos >= dd->first_user_ctxt)
127		return NULL;
128	return pos;
129}
130
131static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
132{
133	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
134	struct qib_devdata *dd = dd_from_dev(ibd);
135
136	if (v == SEQ_START_TOKEN)
137		return pos;
138
139	++*pos;
140	if (*pos >= dd->first_user_ctxt)
141		return NULL;
142	return pos;
143}
144
145static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
146{
147	/* nothing allocated */
148}
149
150static int _ctx_stats_seq_show(struct seq_file *s, void *v)
151{
152	loff_t *spos;
153	loff_t i, j;
154	u64 n_packets = 0;
155	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
156	struct qib_devdata *dd = dd_from_dev(ibd);
157
158	if (v == SEQ_START_TOKEN) {
159		seq_puts(s, "Ctx:npkts\n");
160		return 0;
161	}
162
163	spos = v;
164	i = *spos;
165
166	if (!dd->rcd[i])
167		return SEQ_SKIP;
168
169	for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
170		n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
171
172	if (!n_packets)
173		return SEQ_SKIP;
174
175	seq_printf(s, "  %llu:%llu\n", i, n_packets);
176	return 0;
177}
178
179DEBUGFS_FILE(ctx_stats)
180
181static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
182	__acquires(RCU)
183{
184	struct rvt_qp_iter *iter;
185	loff_t n = *pos;
186
187	iter = rvt_qp_iter_init(s->private, 0, NULL);
188
189	/* stop calls rcu_read_unlock */
190	rcu_read_lock();
191
192	if (!iter)
193		return NULL;
194
195	do {
196		if (rvt_qp_iter_next(iter)) {
197			kfree(iter);
198			return NULL;
199		}
200	} while (n--);
201
202	return iter;
203}
204
205static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
206				   loff_t *pos)
207	__must_hold(RCU)
208{
209	struct rvt_qp_iter *iter = iter_ptr;
210
211	(*pos)++;
212
213	if (rvt_qp_iter_next(iter)) {
214		kfree(iter);
215		return NULL;
216	}
217
218	return iter;
219}
220
221static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
222	__releases(RCU)
223{
224	rcu_read_unlock();
225}
226
227static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
228{
229	struct rvt_qp_iter *iter = iter_ptr;
230
231	if (!iter)
232		return 0;
233
234	qib_qp_iter_print(s, iter);
235
236	return 0;
237}
238
239DEBUGFS_FILE(qp_stats)
240
241void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
242{
243	struct dentry *root;
244	char name[10];
245
246	snprintf(name, sizeof(name), "qib%d", dd_from_dev(ibd)->unit);
247	root = debugfs_create_dir(name, qib_dbg_root);
248	ibd->qib_ibdev_dbg = root;
249
250	debugfs_create_file("opcode_stats", 0400, root, ibd,
251			    &_opcode_stats_file_ops);
252	debugfs_create_file("ctx_stats", 0400, root, ibd, &_ctx_stats_file_ops);
253	debugfs_create_file("qp_stats", 0400, root, ibd, &_qp_stats_file_ops);
254}
255
256void qib_dbg_ibdev_exit(struct qib_ibdev *ibd)
257{
258	if (!qib_dbg_root)
259		goto out;
260	debugfs_remove_recursive(ibd->qib_ibdev_dbg);
261out:
262	ibd->qib_ibdev_dbg = NULL;
263}
264
265void qib_dbg_init(void)
266{
267	qib_dbg_root = debugfs_create_dir(QIB_DRV_NAME, NULL);
268}
269
270void qib_dbg_exit(void)
271{
272	debugfs_remove_recursive(qib_dbg_root);
273	qib_dbg_root = NULL;
274}