290 lines
6.5 KiB
C
290 lines
6.5 KiB
C
#ifdef CONFIG_DEBUG_FS
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/*
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* Copyright (c) 2013 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include "qib.h"
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#include "qib_verbs.h"
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#include "qib_debugfs.h"
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static struct dentry *qib_dbg_root;
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#define DEBUGFS_FILE(name) \
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static const struct seq_operations _##name##_seq_ops = { \
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.start = _##name##_seq_start, \
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.next = _##name##_seq_next, \
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.stop = _##name##_seq_stop, \
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.show = _##name##_seq_show \
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}; \
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static int _##name##_open(struct inode *inode, struct file *s) \
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{ \
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struct seq_file *seq; \
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int ret; \
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ret = seq_open(s, &_##name##_seq_ops); \
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if (ret) \
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return ret; \
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seq = s->private_data; \
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seq->private = inode->i_private; \
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return 0; \
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} \
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static const struct file_operations _##name##_file_ops = { \
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.owner = THIS_MODULE, \
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.open = _##name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = seq_release \
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};
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#define DEBUGFS_FILE_CREATE(name) \
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do { \
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struct dentry *ent; \
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ent = debugfs_create_file(#name , 0400, ibd->qib_ibdev_dbg, \
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ibd, &_##name##_file_ops); \
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if (!ent) \
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pr_warn("create of " #name " failed\n"); \
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} while (0)
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static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
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{
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struct qib_opcode_stats_perctx *opstats;
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if (*pos >= ARRAY_SIZE(opstats->stats))
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return NULL;
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return pos;
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}
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static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
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{
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struct qib_opcode_stats_perctx *opstats;
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++*pos;
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if (*pos >= ARRAY_SIZE(opstats->stats))
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return NULL;
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return pos;
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}
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static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
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{
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/* nothing allocated */
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}
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static int _opcode_stats_seq_show(struct seq_file *s, void *v)
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{
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loff_t *spos = v;
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loff_t i = *spos, j;
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u64 n_packets = 0, n_bytes = 0;
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struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
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struct qib_devdata *dd = dd_from_dev(ibd);
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for (j = 0; j < dd->first_user_ctxt; j++) {
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if (!dd->rcd[j])
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continue;
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n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
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n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
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}
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if (!n_packets && !n_bytes)
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return SEQ_SKIP;
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seq_printf(s, "%02llx %llu/%llu\n", i,
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(unsigned long long) n_packets,
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(unsigned long long) n_bytes);
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return 0;
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}
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DEBUGFS_FILE(opcode_stats)
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static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
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{
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struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
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struct qib_devdata *dd = dd_from_dev(ibd);
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if (!*pos)
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return SEQ_START_TOKEN;
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if (*pos >= dd->first_user_ctxt)
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return NULL;
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return pos;
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}
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static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
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{
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struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
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struct qib_devdata *dd = dd_from_dev(ibd);
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if (v == SEQ_START_TOKEN)
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return pos;
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++*pos;
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if (*pos >= dd->first_user_ctxt)
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return NULL;
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return pos;
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}
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static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
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{
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/* nothing allocated */
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}
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static int _ctx_stats_seq_show(struct seq_file *s, void *v)
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{
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loff_t *spos;
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loff_t i, j;
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u64 n_packets = 0;
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struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
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struct qib_devdata *dd = dd_from_dev(ibd);
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if (v == SEQ_START_TOKEN) {
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seq_puts(s, "Ctx:npkts\n");
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return 0;
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}
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spos = v;
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i = *spos;
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if (!dd->rcd[i])
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return SEQ_SKIP;
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for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
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n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
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if (!n_packets)
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return SEQ_SKIP;
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seq_printf(s, " %llu:%llu\n", i, n_packets);
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return 0;
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}
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DEBUGFS_FILE(ctx_stats)
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static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
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__acquires(RCU)
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{
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struct qib_qp_iter *iter;
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loff_t n = *pos;
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iter = qib_qp_iter_init(s->private);
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/* stop calls rcu_read_unlock */
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rcu_read_lock();
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if (!iter)
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return NULL;
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do {
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if (qib_qp_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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} while (n--);
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return iter;
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}
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static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
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loff_t *pos)
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__must_hold(RCU)
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{
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struct qib_qp_iter *iter = iter_ptr;
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(*pos)++;
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if (qib_qp_iter_next(iter)) {
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kfree(iter);
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return NULL;
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}
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return iter;
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}
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static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
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__releases(RCU)
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{
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rcu_read_unlock();
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}
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static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
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{
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struct qib_qp_iter *iter = iter_ptr;
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if (!iter)
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return 0;
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qib_qp_iter_print(s, iter);
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return 0;
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}
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DEBUGFS_FILE(qp_stats)
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void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
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{
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char name[10];
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snprintf(name, sizeof(name), "qib%d", dd_from_dev(ibd)->unit);
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ibd->qib_ibdev_dbg = debugfs_create_dir(name, qib_dbg_root);
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if (!ibd->qib_ibdev_dbg) {
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pr_warn("create of %s failed\n", name);
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return;
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}
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DEBUGFS_FILE_CREATE(opcode_stats);
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DEBUGFS_FILE_CREATE(ctx_stats);
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DEBUGFS_FILE_CREATE(qp_stats);
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}
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void qib_dbg_ibdev_exit(struct qib_ibdev *ibd)
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{
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if (!qib_dbg_root)
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goto out;
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debugfs_remove_recursive(ibd->qib_ibdev_dbg);
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out:
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ibd->qib_ibdev_dbg = NULL;
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}
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void qib_dbg_init(void)
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{
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qib_dbg_root = debugfs_create_dir(QIB_DRV_NAME, NULL);
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if (!qib_dbg_root)
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pr_warn("init of debugfs failed\n");
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}
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void qib_dbg_exit(void)
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{
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debugfs_remove_recursive(qib_dbg_root);
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qib_dbg_root = NULL;
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}
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#endif
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