346 lines
8.4 KiB
C
346 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright IBM Corp. 2008, 2009
|
|
*
|
|
* Author: Jan Glauber (jang@linux.vnet.ibm.com)
|
|
*/
|
|
#include <linux/seq_file.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/export.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/debug.h>
|
|
#include "qdio_debug.h"
|
|
#include "qdio.h"
|
|
|
|
debug_info_t *qdio_dbf_setup;
|
|
debug_info_t *qdio_dbf_error;
|
|
|
|
static struct dentry *debugfs_root;
|
|
#define QDIO_DEBUGFS_NAME_LEN 10
|
|
#define QDIO_DBF_NAME_LEN 20
|
|
|
|
struct qdio_dbf_entry {
|
|
char dbf_name[QDIO_DBF_NAME_LEN];
|
|
debug_info_t *dbf_info;
|
|
struct list_head dbf_list;
|
|
};
|
|
|
|
static LIST_HEAD(qdio_dbf_list);
|
|
static DEFINE_MUTEX(qdio_dbf_list_mutex);
|
|
|
|
static debug_info_t *qdio_get_dbf_entry(char *name)
|
|
{
|
|
struct qdio_dbf_entry *entry;
|
|
debug_info_t *rc = NULL;
|
|
|
|
mutex_lock(&qdio_dbf_list_mutex);
|
|
list_for_each_entry(entry, &qdio_dbf_list, dbf_list) {
|
|
if (strcmp(entry->dbf_name, name) == 0) {
|
|
rc = entry->dbf_info;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&qdio_dbf_list_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static void qdio_clear_dbf_list(void)
|
|
{
|
|
struct qdio_dbf_entry *entry, *tmp;
|
|
|
|
mutex_lock(&qdio_dbf_list_mutex);
|
|
list_for_each_entry_safe(entry, tmp, &qdio_dbf_list, dbf_list) {
|
|
list_del(&entry->dbf_list);
|
|
debug_unregister(entry->dbf_info);
|
|
kfree(entry);
|
|
}
|
|
mutex_unlock(&qdio_dbf_list_mutex);
|
|
}
|
|
|
|
int qdio_allocate_dbf(struct qdio_irq *irq_ptr)
|
|
{
|
|
char text[QDIO_DBF_NAME_LEN];
|
|
struct qdio_dbf_entry *new_entry;
|
|
|
|
DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
|
|
|
|
/* allocate trace view for the interface */
|
|
snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
|
|
dev_name(&irq_ptr->cdev->dev));
|
|
irq_ptr->debug_area = qdio_get_dbf_entry(text);
|
|
if (irq_ptr->debug_area)
|
|
DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused");
|
|
else {
|
|
irq_ptr->debug_area = debug_register(text, 2, 1, 16);
|
|
if (!irq_ptr->debug_area)
|
|
return -ENOMEM;
|
|
if (debug_register_view(irq_ptr->debug_area,
|
|
&debug_hex_ascii_view)) {
|
|
debug_unregister(irq_ptr->debug_area);
|
|
return -ENOMEM;
|
|
}
|
|
debug_set_level(irq_ptr->debug_area, DBF_WARN);
|
|
DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
|
|
new_entry = kzalloc(sizeof(struct qdio_dbf_entry), GFP_KERNEL);
|
|
if (!new_entry) {
|
|
debug_unregister(irq_ptr->debug_area);
|
|
return -ENOMEM;
|
|
}
|
|
strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN);
|
|
new_entry->dbf_info = irq_ptr->debug_area;
|
|
mutex_lock(&qdio_dbf_list_mutex);
|
|
list_add(&new_entry->dbf_list, &qdio_dbf_list);
|
|
mutex_unlock(&qdio_dbf_list_mutex);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int qstat_show(struct seq_file *m, void *v)
|
|
{
|
|
unsigned char state;
|
|
struct qdio_q *q = m->private;
|
|
int i;
|
|
|
|
if (!q)
|
|
return 0;
|
|
|
|
seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
|
|
q->timestamp, last_ai_time);
|
|
seq_printf(m, "nr_used: %d ftc: %d\n",
|
|
atomic_read(&q->nr_buf_used), q->first_to_check);
|
|
if (q->is_input_q) {
|
|
seq_printf(m, "batch start: %u batch count: %u\n",
|
|
q->u.in.batch_start, q->u.in.batch_count);
|
|
seq_printf(m, "DSCI: %x IRQs disabled: %u\n",
|
|
*(u8 *)q->irq_ptr->dsci,
|
|
test_bit(QDIO_IRQ_DISABLED,
|
|
&q->irq_ptr->poll_state));
|
|
}
|
|
seq_printf(m, "SBAL states:\n");
|
|
seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
|
|
|
|
for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
|
|
debug_get_buf_state(q, i, &state);
|
|
switch (state) {
|
|
case SLSB_P_INPUT_NOT_INIT:
|
|
case SLSB_P_OUTPUT_NOT_INIT:
|
|
seq_printf(m, "N");
|
|
break;
|
|
case SLSB_P_OUTPUT_PENDING:
|
|
seq_printf(m, "P");
|
|
break;
|
|
case SLSB_P_INPUT_PRIMED:
|
|
case SLSB_CU_OUTPUT_PRIMED:
|
|
seq_printf(m, "+");
|
|
break;
|
|
case SLSB_P_INPUT_ACK:
|
|
seq_printf(m, "A");
|
|
break;
|
|
case SLSB_P_INPUT_ERROR:
|
|
case SLSB_P_OUTPUT_ERROR:
|
|
seq_printf(m, "x");
|
|
break;
|
|
case SLSB_CU_INPUT_EMPTY:
|
|
case SLSB_P_OUTPUT_EMPTY:
|
|
seq_printf(m, "-");
|
|
break;
|
|
case SLSB_P_INPUT_HALTED:
|
|
case SLSB_P_OUTPUT_HALTED:
|
|
seq_printf(m, ".");
|
|
break;
|
|
default:
|
|
seq_printf(m, "?");
|
|
}
|
|
if (i == 63)
|
|
seq_printf(m, "\n");
|
|
}
|
|
seq_printf(m, "\n");
|
|
seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
|
|
|
|
seq_printf(m, "\nSBAL statistics:");
|
|
if (!q->irq_ptr->perf_stat_enabled) {
|
|
seq_printf(m, " disabled\n");
|
|
return 0;
|
|
}
|
|
|
|
seq_printf(m, "\n1 2.. 4.. 8.. "
|
|
"16.. 32.. 64.. 128\n");
|
|
for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
|
|
seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
|
|
seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
|
|
q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
|
|
q->q_stats.nr_sbal_total);
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(qstat);
|
|
|
|
static int ssqd_show(struct seq_file *m, void *v)
|
|
{
|
|
struct ccw_device *cdev = m->private;
|
|
struct qdio_ssqd_desc ssqd;
|
|
int rc;
|
|
|
|
rc = qdio_get_ssqd_desc(cdev, &ssqd);
|
|
if (rc)
|
|
return rc;
|
|
|
|
seq_hex_dump(m, "", DUMP_PREFIX_NONE, 16, 4, &ssqd, sizeof(ssqd),
|
|
false);
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(ssqd);
|
|
|
|
static char *qperf_names[] = {
|
|
"Assumed adapter interrupts",
|
|
"QDIO interrupts",
|
|
"Requested PCIs",
|
|
"Inbound tasklet runs",
|
|
"Inbound tasklet resched",
|
|
"Inbound tasklet resched2",
|
|
"Outbound tasklet runs",
|
|
"SIGA read",
|
|
"SIGA write",
|
|
"SIGA sync",
|
|
"Inbound calls",
|
|
"Inbound handler",
|
|
"Inbound stop_polling",
|
|
"Inbound queue full",
|
|
"Outbound calls",
|
|
"Outbound handler",
|
|
"Outbound queue full",
|
|
"Outbound fast_requeue",
|
|
"Outbound target_full",
|
|
"QEBSM eqbs",
|
|
"QEBSM eqbs partial",
|
|
"QEBSM sqbs",
|
|
"QEBSM sqbs partial",
|
|
"Discarded interrupts"
|
|
};
|
|
|
|
static int qperf_show(struct seq_file *m, void *v)
|
|
{
|
|
struct qdio_irq *irq_ptr = m->private;
|
|
unsigned int *stat;
|
|
int i;
|
|
|
|
if (!irq_ptr)
|
|
return 0;
|
|
if (!irq_ptr->perf_stat_enabled) {
|
|
seq_printf(m, "disabled\n");
|
|
return 0;
|
|
}
|
|
stat = (unsigned int *)&irq_ptr->perf_stat;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
|
|
seq_printf(m, "%26s:\t%u\n",
|
|
qperf_names[i], *(stat + i));
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
|
|
size_t count, loff_t *off)
|
|
{
|
|
struct seq_file *seq = file->private_data;
|
|
struct qdio_irq *irq_ptr = seq->private;
|
|
struct qdio_q *q;
|
|
unsigned long val;
|
|
int ret, i;
|
|
|
|
if (!irq_ptr)
|
|
return 0;
|
|
|
|
ret = kstrtoul_from_user(ubuf, count, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (val) {
|
|
case 0:
|
|
irq_ptr->perf_stat_enabled = 0;
|
|
memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
|
|
for_each_input_queue(irq_ptr, q, i)
|
|
memset(&q->q_stats, 0, sizeof(q->q_stats));
|
|
for_each_output_queue(irq_ptr, q, i)
|
|
memset(&q->q_stats, 0, sizeof(q->q_stats));
|
|
break;
|
|
case 1:
|
|
irq_ptr->perf_stat_enabled = 1;
|
|
break;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static int qperf_seq_open(struct inode *inode, struct file *filp)
|
|
{
|
|
return single_open(filp, qperf_show,
|
|
file_inode(filp)->i_private);
|
|
}
|
|
|
|
static const struct file_operations debugfs_perf_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = qperf_seq_open,
|
|
.read = seq_read,
|
|
.write = qperf_seq_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q)
|
|
{
|
|
char name[QDIO_DEBUGFS_NAME_LEN];
|
|
|
|
snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
|
|
q->is_input_q ? "input" : "output",
|
|
q->nr);
|
|
debugfs_create_file(name, 0444, parent, q, &qstat_fops);
|
|
}
|
|
|
|
void qdio_setup_debug_entries(struct qdio_irq *irq_ptr)
|
|
{
|
|
struct qdio_q *q;
|
|
int i;
|
|
|
|
irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev),
|
|
debugfs_root);
|
|
debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
|
|
irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);
|
|
debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev,
|
|
&ssqd_fops);
|
|
|
|
for_each_input_queue(irq_ptr, q, i)
|
|
setup_debugfs_entry(irq_ptr->debugfs_dev, q);
|
|
for_each_output_queue(irq_ptr, q, i)
|
|
setup_debugfs_entry(irq_ptr->debugfs_dev, q);
|
|
}
|
|
|
|
void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
|
|
{
|
|
debugfs_remove_recursive(irq_ptr->debugfs_dev);
|
|
}
|
|
|
|
int __init qdio_debug_init(void)
|
|
{
|
|
debugfs_root = debugfs_create_dir("qdio", NULL);
|
|
|
|
qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
|
|
debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
|
|
debug_set_level(qdio_dbf_setup, DBF_INFO);
|
|
DBF_EVENT("dbf created\n");
|
|
|
|
qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
|
|
debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
|
|
debug_set_level(qdio_dbf_error, DBF_INFO);
|
|
DBF_ERROR("dbf created\n");
|
|
return 0;
|
|
}
|
|
|
|
void qdio_debug_exit(void)
|
|
{
|
|
qdio_clear_dbf_list();
|
|
debugfs_remove_recursive(debugfs_root);
|
|
debug_unregister(qdio_dbf_setup);
|
|
debug_unregister(qdio_dbf_error);
|
|
}
|