1 files changed, 126 insertions, 51 deletions

diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index f49761ff9a0..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;
+
+	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;
+}
 
-void qdio_allocate_dbf(struct qdio_initialize *init_data,
+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);
@@ -33,17 +74,39 @@ void qdio_allocate_dbf(struct qdio_initialize *init_data,
 	DBF_HEX(&init_data->input_handler, sizeof(void *));
 	DBF_HEX(&init_data->output_handler, sizeof(void *));
 	DBF_HEX(&init_data->int_parm, sizeof(long));
-	DBF_HEX(&init_data->flags, sizeof(long));
 	DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
 	DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
 	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)
@@ -55,12 +118,21 @@ 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", q->first_to_check, q->last_move);
-	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, "slsb buffer states:\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, "DSCI: %d   IRQs disabled: %u\n",
+			   *(u32 *)q->irq_ptr->dsci,
+			   test_bit(QDIO_QUEUE_IRQS_DISABLED,
+			   &q->u.in.queue_irq_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++) {
@@ -70,6 +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, "+");
@@ -97,36 +172,33 @@ static int qstat_show(struct seq_file *m, void *v)
 	}
 	seq_printf(m, "\n");
 	seq_printf(m, "|64     |72     |80     |88     |96     |104    |112    |   127|\n");
-	return 0;
-}
-
-static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
-			       size_t count, loff_t *off)
-{
-	struct seq_file *seq = file->private_data;
-	struct qdio_q *q = seq->private;
 
-	if (!q)
+	seq_printf(m, "\nSBAL statistics:");
+	if (!q->irq_ptr->perf_stat_enabled) {
+		seq_printf(m, " disabled\n");
 		return 0;
-	if (q->is_input_q)
-		xchg(q->irq_ptr->dsci, 1);
-	local_bh_disable();
-	tasklet_schedule(&q->tasklet);
-	local_bh_enable();
-	return count;
+	}
+
+	seq_printf(m, "\n1          2..        4..        8..        "
+		   "16..       32..       64..       127\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;
 }
 
 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 = {
 	.owner	 = THIS_MODULE,
 	.open	 = qstat_seq_open,
 	.read	 = seq_read,
-	.write	 = qstat_seq_write,
 	.llseek  = seq_lseek,
 	.release = single_release,
 };
@@ -148,12 +220,14 @@ static char *qperf_names[] = {
 	"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"
+	"QEBSM sqbs partial",
+	"Discarded interrupts"
 };
 
 static int qperf_show(struct seq_file *m, void *v)
@@ -181,26 +255,25 @@ static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
 {
 	struct seq_file *seq = file->private_data;
 	struct qdio_irq *irq_ptr = seq->private;
+	struct qdio_q *q;
 	unsigned long val;
-	char buf[8];
-	int ret;
+	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) {
 	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;
@@ -212,10 +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,
@@ -223,7 +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];
 
@@ -254,12 +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;
@@ -290,6 +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);