Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 339 insertions, 0 deletions

diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
new file mode 100644
index 0000000000..1a9714af51
--- /dev/null
+++ b/drivers/s390/cio/qdio_debug.c
@@ -0,0 +1,339 @@
+// 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;
+		}
+		strscpy(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);
+}