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path: root/drivers/s390/cio/qdio_debug.c
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Diffstat (limited to 'drivers/s390/cio/qdio_debug.c')
-rw-r--r--drivers/s390/cio/qdio_debug.c125
1 files changed, 95 insertions, 30 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index f8b03a636e4..f1f3baa8e6e 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -1,12 +1,13 @@
/*
- * drivers/s390/cio/qdio_debug.c
- *
- * Copyright IBM Corp. 2008,2009
+ * 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"
@@ -16,11 +17,51 @@ 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;
-void qdio_allocate_dbf(struct qdio_initialize *init_data,
+ 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_initialize *init_data,
struct qdio_irq *irq_ptr)
{
- char text[20];
+ char text[QDIO_DBF_NAME_LEN];
+ struct qdio_dbf_entry *new_entry;
DBF_EVENT("qfmt:%1d", init_data->q_format);
DBF_HEX(init_data->adapter_name, 8);
@@ -38,11 +79,34 @@ void qdio_allocate_dbf(struct qdio_initialize *init_data,
DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
/* allocate trace view for the interface */
- snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
- irq_ptr->debug_area = debug_register(text, 2, 1, 16);
- debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
- debug_set_level(irq_ptr->debug_area, DBF_WARN);
- DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
+ snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
+ dev_name(&init_data->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)
@@ -54,15 +118,17 @@ static int qstat_show(struct seq_file *m, void *v)
if (!q)
return 0;
- seq_printf(m, "DSCI: %d nr_used: %d\n",
- *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used));
- seq_printf(m, "ftc: %d last_move: %d\n",
+ seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
+ q->timestamp, last_ai_time);
+ seq_printf(m, "nr_used: %d ftc: %d last_move: %d\n",
+ atomic_read(&q->nr_buf_used),
q->first_to_check, q->last_move);
if (q->is_input_q) {
seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
q->u.in.polling, q->u.in.ack_start,
q->u.in.ack_count);
- seq_printf(m, "IRQs disabled: %u\n",
+ seq_printf(m, "DSCI: %d IRQs disabled: %u\n",
+ *(u32 *)q->irq_ptr->dsci,
test_bit(QDIO_QUEUE_IRQS_DISABLED,
&q->u.in.queue_irq_state));
}
@@ -76,6 +142,9 @@ static int qstat_show(struct seq_file *m, void *v)
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, "+");
@@ -123,7 +192,7 @@ static int qstat_show(struct seq_file *m, void *v)
static int qstat_seq_open(struct inode *inode, struct file *filp)
{
return single_open(filp, qstat_show,
- filp->f_path.dentry->d_inode->i_private);
+ file_inode(filp)->i_private);
}
static const struct file_operations debugfs_fops = {
@@ -188,19 +257,13 @@ static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
struct qdio_irq *irq_ptr = seq->private;
struct qdio_q *q;
unsigned long val;
- char buf[8];
int ret, i;
if (!irq_ptr)
return 0;
- if (count >= sizeof(buf))
- return -EINVAL;
- if (copy_from_user(&buf, ubuf, count))
- return -EFAULT;
- buf[count] = 0;
-
- ret = strict_strtoul(buf, 10, &val);
- if (ret < 0)
+
+ ret = kstrtoul_from_user(ubuf, count, 10, &val);
+ if (ret)
return ret;
switch (val) {
@@ -222,10 +285,10 @@ static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
static int qperf_seq_open(struct inode *inode, struct file *filp)
{
return single_open(filp, qperf_show,
- filp->f_path.dentry->d_inode->i_private);
+ file_inode(filp)->i_private);
}
-static struct file_operations debugfs_perf_fops = {
+static const struct file_operations debugfs_perf_fops = {
.owner = THIS_MODULE,
.open = qperf_seq_open,
.read = seq_read,
@@ -233,7 +296,8 @@ static struct file_operations debugfs_perf_fops = {
.llseek = seq_lseek,
.release = single_release,
};
-static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
+
+static void setup_debugfs_entry(struct qdio_q *q)
{
char name[QDIO_DEBUGFS_NAME_LEN];
@@ -264,12 +328,12 @@ void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
irq_ptr->debugfs_perf = NULL;
for_each_input_queue(irq_ptr, q, i)
- setup_debugfs_entry(q, cdev);
+ setup_debugfs_entry(q);
for_each_output_queue(irq_ptr, q, i)
- setup_debugfs_entry(q, cdev);
+ setup_debugfs_entry(q);
}
-void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
+void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
{
struct qdio_q *q;
int i;
@@ -300,6 +364,7 @@ int __init qdio_debug_init(void)
void qdio_debug_exit(void)
{
+ qdio_clear_dbf_list();
debugfs_remove(debugfs_root);
if (qdio_dbf_setup)
debug_unregister(qdio_dbf_setup);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 20:24:07 +0000