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OpenCloudOS-Kernel/drivers/s390/cio/qdio_debug.c

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// 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: %llx\n", q->timestamp);
seq_printf(m, "Last Data IRQ: %llx Last AI: %llx\n",
q->irq_ptr->last_data_irq_time, 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",
"SIGA read",
"SIGA write",
"SIGA sync",
"Inbound calls",
"Inbound stop_polling",
"Inbound queue full",
"Outbound calls",
"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);
}
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