- 根目录:
- drivers
- staging
- rdma
- hfi1
- debugfs.c
#ifdef CONFIG_DEBUG_FS
/*
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include "hfi.h"
#include "debugfs.h"
#include "device.h"
#include "qp.h"
#include "sdma.h"
static struct dentry *hfi1_dbg_root;
#define private2dd(file) (file_inode(file)->i_private)
#define private2ppd(file) (file_inode(file)->i_private)
#define DEBUGFS_SEQ_FILE_OPS(name) \
static const struct seq_operations _##name##_seq_ops = { \
.start = _##name##_seq_start, \
.next = _##name##_seq_next, \
.stop = _##name##_seq_stop, \
.show = _##name##_seq_show \
}
#define DEBUGFS_SEQ_FILE_OPEN(name) \
static int _##name##_open(struct inode *inode, struct file *s) \
{ \
struct seq_file *seq; \
int ret; \
ret = seq_open(s, &_##name##_seq_ops); \
if (ret) \
return ret; \
seq = s->private_data; \
seq->private = inode->i_private; \
return 0; \
}
#define DEBUGFS_FILE_OPS(name) \
static const struct file_operations _##name##_file_ops = { \
.owner = THIS_MODULE, \
.open = _##name##_open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = seq_release \
}
#define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \
do { \
struct dentry *ent; \
ent = debugfs_create_file(name, mode, parent, \
data, ops); \
if (!ent) \
pr_warn("create of %s failed\n", name); \
} while (0)
#define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO)
static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
struct hfi1_opcode_stats_perctx *opstats;
rcu_read_lock();
if (*pos >= ARRAY_SIZE(opstats->stats))
return NULL;
return pos;
}
static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_opcode_stats_perctx *opstats;
++*pos;
if (*pos >= ARRAY_SIZE(opstats->stats))
return NULL;
return pos;
}
static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
__releases(RCU)
{
rcu_read_unlock();
}
static int _opcode_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
loff_t i = *spos, j;
u64 n_packets = 0, n_bytes = 0;
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
for (j = 0; j < dd->first_user_ctxt; j++) {
if (!dd->rcd[j])
continue;
n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
}
if (!n_packets && !n_bytes)
return SEQ_SKIP;
seq_printf(s, "%02llx %llu/%llu\n", i,
(unsigned long long) n_packets,
(unsigned long long) n_bytes);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(opcode_stats);
DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
DEBUGFS_FILE_OPS(opcode_stats);
static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
if (!*pos)
return SEQ_START_TOKEN;
if (*pos >= dd->first_user_ctxt)
return NULL;
return pos;
}
static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
if (v == SEQ_START_TOKEN)
return pos;
++*pos;
if (*pos >= dd->first_user_ctxt)
return NULL;
return pos;
}
static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
{
/* nothing allocated */
}
static int _ctx_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos;
loff_t i, j;
u64 n_packets = 0;
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
if (v == SEQ_START_TOKEN) {
seq_puts(s, "Ctx:npkts\n");
return 0;
}
spos = v;
i = *spos;
if (!dd->rcd[i])
return SEQ_SKIP;
for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
if (!n_packets)
return SEQ_SKIP;
seq_printf(s, " %llu:%llu\n", i, n_packets);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(ctx_stats);
DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
DEBUGFS_FILE_OPS(ctx_stats);
static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
struct qp_iter *iter;
loff_t n = *pos;
rcu_read_lock();
iter = qp_iter_init(s->private);
if (!iter)
return NULL;
while (n--) {
if (qp_iter_next(iter)) {
kfree(iter);
return NULL;
}
}
return iter;
}
static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
loff_t *pos)
{
struct qp_iter *iter = iter_ptr;
(*pos)++;
if (qp_iter_next(iter)) {
kfree(iter);
return NULL;
}
return iter;
}
static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
__releases(RCU)
{
rcu_read_unlock();
}
static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
{
struct qp_iter *iter = iter_ptr;
if (!iter)
return 0;
qp_iter_print(s, iter);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(qp_stats);
DEBUGFS_SEQ_FILE_OPEN(qp_stats)
DEBUGFS_FILE_OPS(qp_stats);
static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
struct hfi1_ibdev *ibd;
struct hfi1_devdata *dd;
rcu_read_lock();
ibd = (struct hfi1_ibdev *)s->private;
dd = dd_from_dev(ibd);
if (!dd->per_sdma || *pos >= dd->num_sdma)
return NULL;
return pos;
}
static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
++*pos;
if (!dd->per_sdma || *pos >= dd->num_sdma)
return NULL;
return pos;
}
static void _sdes_seq_stop(struct seq_file *s, void *v)
__releases(RCU)
{
rcu_read_unlock();
}
static int _sdes_seq_show(struct seq_file *s, void *v)
{
struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
struct hfi1_devdata *dd = dd_from_dev(ibd);
loff_t *spos = v;
loff_t i = *spos;
sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(sdes);
DEBUGFS_SEQ_FILE_OPEN(sdes)
DEBUGFS_FILE_OPS(sdes);
/* read the per-device counters */
static ssize_t dev_counters_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
u64 *counters;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
rcu_read_lock();
dd = private2dd(file);
avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters);
rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
rcu_read_unlock();
return rval;
}
/* read the per-device counters */
static ssize_t dev_names_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
char *names;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
rcu_read_lock();
dd = private2dd(file);
avail = hfi1_read_cntrs(dd, *ppos, &names, NULL);
rval = simple_read_from_buffer(buf, count, ppos, names, avail);
rcu_read_unlock();
return rval;
}
struct counter_info {
char *name;
const struct file_operations ops;
};
/*
* Could use file_inode(file)->i_ino to figure out which file,
* instead of separate routine for each, but for now, this works...
*/
/* read the per-port names (same for each port) */
static ssize_t portnames_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
char *names;
size_t avail;
struct hfi1_devdata *dd;
ssize_t rval;
rcu_read_lock();
dd = private2dd(file);
/* port number n/a here since names are constant */
avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL);
rval = simple_read_from_buffer(buf, count, ppos, names, avail);
rcu_read_unlock();
return rval;
}
/* read the per-port counters */
static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
u64 *counters;
size_t avail;
struct hfi1_devdata *dd;
struct hfi1_pportdata *ppd;
ssize_t rval;
rcu_read_lock();
ppd = private2ppd(file);
dd = ppd->dd;
avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters);
rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
rcu_read_unlock();
return rval;
}
/*
* read the per-port QSFP data for ppd
*/
static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct hfi1_pportdata *ppd;
char *tmp;
int ret;
rcu_read_lock();
ppd = private2ppd(file);
tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!tmp) {
rcu_read_unlock();
return -ENOMEM;
}
ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
if (ret > 0)
ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
rcu_read_unlock();
kfree(tmp);
return ret;
}
/* Do an i2c write operation on the chain for the given HFI. */
static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int i2c_addr;
int offset;
int total_written;
rcu_read_lock();
ppd = private2ppd(file);
buff = kmalloc(count, GFP_KERNEL);
if (!buff) {
ret = -ENOMEM;
goto _return;
}
ret = copy_from_user(buff, buf, count);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
i2c_addr = (*ppos >> 16) & 0xff;
offset = *ppos & 0xffff;
total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
if (total_written < 0) {
ret = total_written;
goto _free;
}
*ppos += total_written;
ret = total_written;
_free:
kfree(buff);
_return:
rcu_read_unlock();
return ret;
}
/* Do an i2c write operation on chain for HFI 0. */
static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_write(file, buf, count, ppos, 0);
}
/* Do an i2c write operation on chain for HFI 1. */
static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_write(file, buf, count, ppos, 1);
}
/* Do an i2c read operation on the chain for the given HFI. */
static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int i2c_addr;
int offset;
int total_read;
rcu_read_lock();
ppd = private2ppd(file);
buff = kmalloc(count, GFP_KERNEL);
if (!buff) {
ret = -ENOMEM;
goto _return;
}
i2c_addr = (*ppos >> 16) & 0xff;
offset = *ppos & 0xffff;
total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
if (total_read < 0) {
ret = total_read;
goto _free;
}
*ppos += total_read;
ret = copy_to_user(buf, buff, total_read);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
ret = total_read;
_free:
kfree(buff);
_return:
rcu_read_unlock();
return ret;
}
/* Do an i2c read operation on chain for HFI 0. */
static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_read(file, buf, count, ppos, 0);
}
/* Do an i2c read operation on chain for HFI 1. */
static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __i2c_debugfs_read(file, buf, count, ppos, 1);
}
/* Do a QSFP write operation on the i2c chain for the given HFI. */
static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int total_written;
rcu_read_lock();
if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
ret = -EINVAL;
goto _return;
}
ppd = private2ppd(file);
buff = kmalloc(count, GFP_KERNEL);
if (!buff) {
ret = -ENOMEM;
goto _return;
}
ret = copy_from_user(buff, buf, count);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
total_written = qsfp_write(ppd, target, *ppos, buff, count);
if (total_written < 0) {
ret = total_written;
goto _free;
}
*ppos += total_written;
ret = total_written;
_free:
kfree(buff);
_return:
rcu_read_unlock();
return ret;
}
/* Do a QSFP write operation on i2c chain for HFI 0. */
static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_write(file, buf, count, ppos, 0);
}
/* Do a QSFP write operation on i2c chain for HFI 1. */
static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_write(file, buf, count, ppos, 1);
}
/* Do a QSFP read operation on the i2c chain for the given HFI. */
static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos, u32 target)
{
struct hfi1_pportdata *ppd;
char *buff;
int ret;
int total_read;
rcu_read_lock();
if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
ret = -EINVAL;
goto _return;
}
ppd = private2ppd(file);
buff = kmalloc(count, GFP_KERNEL);
if (!buff) {
ret = -ENOMEM;
goto _return;
}
total_read = qsfp_read(ppd, target, *ppos, buff, count);
if (total_read < 0) {
ret = total_read;
goto _free;
}
*ppos += total_read;
ret = copy_to_user(buf, buff, total_read);
if (ret > 0) {
ret = -EFAULT;
goto _free;
}
ret = total_read;
_free:
kfree(buff);
_return:
rcu_read_unlock();
return ret;
}
/* Do a QSFP read operation on i2c chain for HFI 0. */
static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_read(file, buf, count, ppos, 0);
}
/* Do a QSFP read operation on i2c chain for HFI 1. */
static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
return __qsfp_debugfs_read(file, buf, count, ppos, 1);
}
#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
{ \
.name = nm, \
.ops = { \
.read = readroutine, \
.write = writeroutine, \
.llseek = generic_file_llseek, \
}, \
}
static const struct counter_info cntr_ops[] = {
DEBUGFS_OPS("counter_names", dev_names_read, NULL),
DEBUGFS_OPS("counters", dev_counters_read, NULL),
DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
};
static const struct counter_info port_cntr_ops[] = {
DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write),
DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write),
DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write),
DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write),
};
void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
{
char name[sizeof("port0counters") + 1];
char link[10];
struct hfi1_devdata *dd = dd_from_dev(ibd);
struct hfi1_pportdata *ppd;
int unit = dd->unit;
int i, j;
if (!hfi1_dbg_root)
return;
snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
snprintf(link, sizeof(link), "%d", unit);
ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
if (!ibd->hfi1_ibdev_dbg) {
pr_warn("create of %s failed\n", name);
return;
}
ibd->hfi1_ibdev_link =
debugfs_create_symlink(link, hfi1_dbg_root, name);
if (!ibd->hfi1_ibdev_link) {
pr_warn("create of %s symlink failed\n", name);
return;
}
DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
/* dev counter files */
for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
DEBUGFS_FILE_CREATE(cntr_ops[i].name,
ibd->hfi1_ibdev_dbg,
dd,
&cntr_ops[i].ops, S_IRUGO);
/* per port files */
for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
snprintf(name,
sizeof(name),
port_cntr_ops[i].name,
j + 1);
DEBUGFS_FILE_CREATE(name,
ibd->hfi1_ibdev_dbg,
ppd,
&port_cntr_ops[i].ops,
port_cntr_ops[i].ops.write == NULL ?
S_IRUGO : S_IRUGO|S_IWUSR);
}
}
void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
{
if (!hfi1_dbg_root)
goto out;
debugfs_remove(ibd->hfi1_ibdev_link);
debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
out:
ibd->hfi1_ibdev_dbg = NULL;
synchronize_rcu();
}
/*
* driver stats field names, one line per stat, single string. Used by
* programs like hfistats to print the stats in a way which works for
* different versions of drivers, without changing program source.
* if hfi1_ib_stats changes, this needs to change. Names need to be
* 12 chars or less (w/o newline), for proper display by hfistats utility.
*/
static const char * const hfi1_statnames[] = {
/* must be element 0*/
"KernIntr",
"ErrorIntr",
"Tx_Errs",
"Rcv_Errs",
"H/W_Errs",
"NoPIOBufs",
"CtxtsOpen",
"RcvLen_Errs",
"EgrBufFull",
"EgrHdrFull"
};
static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
rcu_read_lock();
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void *_driver_stats_names_seq_next(
struct seq_file *s,
void *v,
loff_t *pos)
{
++*pos;
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
__releases(RCU)
{
rcu_read_unlock();
}
static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
seq_printf(s, "%s\n", hfi1_statnames[*spos]);
return 0;
}
DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
DEBUGFS_FILE_OPS(driver_stats_names);
static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
__acquires(RCU)
{
rcu_read_lock();
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
++*pos;
if (*pos >= ARRAY_SIZE(hfi1_statnames))
return NULL;
return pos;
}
static void _driver_stats_seq_stop(struct seq_file *s, void *v)
__releases(RCU)
{
rcu_read_unlock();
}
static u64 hfi1_sps_ints(void)
{
unsigned long flags;
struct hfi1_devdata *dd;
u64 sps_ints = 0;
spin_lock_irqsave(&hfi1_devs_lock, flags);
list_for_each_entry(dd, &hfi1_dev_list, list) {
sps_ints += get_all_cpu_total(dd->int_counter);
}
spin_unlock_irqrestore(&hfi1_devs_lock, flags);
return sps_ints;
}
static int _driver_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
char *buffer;
u64 *stats = (u64 *)&hfi1_stats;
size_t sz = seq_get_buf(s, &buffer);
if (sz < sizeof(u64))
return SEQ_SKIP;
/* special case for interrupts */
if (*spos == 0)
*(u64 *)buffer = hfi1_sps_ints();
else
*(u64 *)buffer = stats[*spos];
seq_commit(s, sizeof(u64));
return 0;
}
DEBUGFS_SEQ_FILE_OPS(driver_stats);
DEBUGFS_SEQ_FILE_OPEN(driver_stats)
DEBUGFS_FILE_OPS(driver_stats);
void hfi1_dbg_init(void)
{
hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
if (!hfi1_dbg_root)
pr_warn("init of debugfs failed\n");
DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
}
void hfi1_dbg_exit(void)
{
debugfs_remove_recursive(hfi1_dbg_root);
hfi1_dbg_root = NULL;
}
#endif