[deliverable/linux.git] / drivers / s390 / cio / qdio_debug.c

/*
 *  drivers/s390/cio/qdio_debug.c
 *
 *  Copyright IBM Corp. 2008
 *
 *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
 */
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <asm/qdio.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 MAX_DEBUGFS_QUEUES	32
static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
static DEFINE_MUTEX(debugfs_mutex);
#define QDIO_DEBUGFS_NAME_LEN	40

void qdio_allocate_dbf(struct qdio_initialize *init_data,
		       struct qdio_irq *irq_ptr)
{
	char text[20];

	DBF_EVENT("qfmt:%1d", init_data->q_format);
	DBF_HEX(init_data->adapter_name, 8);
	DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
	DBF_HEX(&init_data->qib_param_field, sizeof(void *));
	DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
	DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
	DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
		  init_data->no_output_qs);
	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");
}

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, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci);
	seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
	seq_printf(m, "ftc: %d\n", q->first_to_check);
	seq_printf(m, "last_move: %d\n", q->last_move);
	seq_printf(m, "polling: %d\n", q->u.in.polling);
	seq_printf(m, "ack start: %d\n", q->u.in.ack_start);
	seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
	seq_printf(m, "slsb buffer states:\n");
	seq_printf(m, "|0      |8      |16     |24     |32     |40     |48     |56  63|\n");

	qdio_siga_sync_q(q);
	for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
		get_buf_state(q, i, &state, 0);
		switch (state) {
		case SLSB_P_INPUT_NOT_INIT:
		case SLSB_P_OUTPUT_NOT_INIT:
			seq_printf(m, "N");
			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");
	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)
		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;
}

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);
}

static void remove_debugfs_entry(struct qdio_q *q)
{
	int i;

	for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
		if (!debugfs_queues[i])
			continue;
		if (debugfs_queues[i]->d_inode->i_private == q) {
			debugfs_remove(debugfs_queues[i]);
			debugfs_queues[i] = NULL;
		}
	}
}

static 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,
};

static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
{
	int i = 0;
	char name[QDIO_DEBUGFS_NAME_LEN];

	while (debugfs_queues[i] != NULL) {
		i++;
		if (i >= MAX_DEBUGFS_QUEUES)
			return;
	}
	snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
		 dev_name(&cdev->dev),
		 q->is_input_q ? "input" : "output",
		 q->nr);
	debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
						debugfs_root, q, &debugfs_fops);
	if (IS_ERR(debugfs_queues[i]))
		debugfs_queues[i] = NULL;
}

void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
{
	struct qdio_q *q;
	int i;

	mutex_lock(&debugfs_mutex);
	for_each_input_queue(irq_ptr, q, i)
		setup_debugfs_entry(q, cdev);
	for_each_output_queue(irq_ptr, q, i)
		setup_debugfs_entry(q, cdev);
	mutex_unlock(&debugfs_mutex);
}

void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
{
	struct qdio_q *q;
	int i;

	mutex_lock(&debugfs_mutex);
	for_each_input_queue(irq_ptr, q, i)
		remove_debugfs_entry(q);
	for_each_output_queue(irq_ptr, q, i)
		remove_debugfs_entry(q);
	mutex_unlock(&debugfs_mutex);
}

int __init qdio_debug_init(void)
{
	debugfs_root = debugfs_create_dir("qdio_queues", 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)
{
	debugfs_remove(debugfs_root);
	if (qdio_dbf_setup)
		debug_unregister(qdio_dbf_setup);
	if (qdio_dbf_error)
		debug_unregister(qdio_dbf_error);
}
Commit	Line	Data
779e6e1c JG	1	/*
	2	* drivers/s390/cio/qdio_debug.c
	3	*
	4	* Copyright IBM Corp. 2008
	5	*
	6	* Author: Jan Glauber (jang@linux.vnet.ibm.com)
	7	*/
	8	#include <linux/proc_fs.h>
	9	#include <linux/seq_file.h>
	10	#include <linux/debugfs.h>
	11	#include <asm/qdio.h>
	12	#include <asm/debug.h>
	13	#include "qdio_debug.h"
	14	#include "qdio.h"
	15
	16	debug_info_t *qdio_dbf_setup;
22f99347	17	debug_info_t *qdio_dbf_error;
779e6e1c JG	18
	19	static struct dentry *debugfs_root;
	20	#define MAX_DEBUGFS_QUEUES 32
	21	static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
	22	static DEFINE_MUTEX(debugfs_mutex);
2c780914	23	#define QDIO_DEBUGFS_NAME_LEN 40
779e6e1c	24
22f99347 JG	25	void qdio_allocate_dbf(struct qdio_initialize *init_data,
22f99347 JG	26	struct qdio_irq *irq_ptr)
779e6e1c	27	{
22f99347 JG	28	char text[20];
	29
	30	DBF_EVENT("qfmt:%1d", init_data->q_format);
	31	DBF_HEX(init_data->adapter_name, 8);
	32	DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
	33	DBF_HEX(&init_data->qib_param_field, sizeof(void *));
	34	DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
	35	DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
	36	DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
	37	init_data->no_output_qs);
	38	DBF_HEX(&init_data->input_handler, sizeof(void *));
	39	DBF_HEX(&init_data->output_handler, sizeof(void *));
	40	DBF_HEX(&init_data->int_parm, sizeof(long));
	41	DBF_HEX(&init_data->flags, sizeof(long));
	42	DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
	43	DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
	44	DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
	45
	46	/* allocate trace view for the interface */
	47	snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
	48	irq_ptr->debug_area = debug_register(text, 2, 1, 16);
	49	debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
	50	debug_set_level(irq_ptr->debug_area, DBF_WARN);
	51	DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
779e6e1c JG	52	}
	53
	54	static int qstat_show(struct seq_file m, void v)
	55	{
	56	unsigned char state;
	57	struct qdio_q *q = m->private;
	58	int i;
	59
	60	if (!q)
	61	return 0;
	62
50f769df	63	seq_printf(m, "device state indicator: %d\n", (u32 )q->irq_ptr->dsci);
779e6e1c JG	64	seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
779e6e1c JG	65	seq_printf(m, "ftc: %d\n", q->first_to_check);
e85dea0e	66	seq_printf(m, "last_move: %d\n", q->last_move);
779e6e1c	67	seq_printf(m, "polling: %d\n", q->u.in.polling);
e85dea0e	68	seq_printf(m, "ack start: %d\n", q->u.in.ack_start);
50f769df	69	seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
779e6e1c	70	seq_printf(m, "slsb buffer states:\n");
50f769df	71	seq_printf(m, "\|0 \|8 \|16 \|24 \|32 \|40 \|48 \|56 63\|\n");
779e6e1c JG	72
	73	qdio_siga_sync_q(q);
	74	for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
50f769df	75	get_buf_state(q, i, &state, 0);
779e6e1c JG	76	switch (state) {
	77	case SLSB_P_INPUT_NOT_INIT:
	78	case SLSB_P_OUTPUT_NOT_INIT:
	79	seq_printf(m, "N");
	80	break;
	81	case SLSB_P_INPUT_PRIMED:
	82	case SLSB_CU_OUTPUT_PRIMED:
	83	seq_printf(m, "+");
	84	break;
	85	case SLSB_P_INPUT_ACK:
	86	seq_printf(m, "A");
	87	break;
	88	case SLSB_P_INPUT_ERROR:
	89	case SLSB_P_OUTPUT_ERROR:
	90	seq_printf(m, "x");
	91	break;
	92	case SLSB_CU_INPUT_EMPTY:
	93	case SLSB_P_OUTPUT_EMPTY:
	94	seq_printf(m, "-");
	95	break;
	96	case SLSB_P_INPUT_HALTED:
	97	case SLSB_P_OUTPUT_HALTED:
	98	seq_printf(m, ".");
	99	break;
	100	default:
	101	seq_printf(m, "?");
	102	}
	103	if (i == 63)
	104	seq_printf(m, "\n");
	105	}
	106	seq_printf(m, "\n");
50f769df	107	seq_printf(m, "\|64 \|72 \|80 \|88 \|96 \|104 \|112 \| 127\|\n");
779e6e1c JG	108	return 0;
	109	}
	110
	111	static ssize_t qstat_seq_write(struct file file, const char __user buf,
	112	size_t count, loff_t *off)
	113	{
	114	struct seq_file *seq = file->private_data;
	115	struct qdio_q *q = seq->private;
	116
	117	if (!q)
	118	return 0;
	119
	120	if (q->is_input_q)
	121	xchg(q->irq_ptr->dsci, 1);
	122	local_bh_disable();
	123	tasklet_schedule(&q->tasklet);
	124	local_bh_enable();
	125	return count;
	126	}
	127
	128	static int qstat_seq_open(struct inode inode, struct file filp)
	129	{
	130	return single_open(filp, qstat_show,
	131	filp->f_path.dentry->d_inode->i_private);
	132	}
	133
779e6e1c JG	134	static void remove_debugfs_entry(struct qdio_q *q)
	135	{
	136	int i;
	137
	138	for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
	139	if (!debugfs_queues[i])
	140	continue;
	141	if (debugfs_queues[i]->d_inode->i_private == q) {
	142	debugfs_remove(debugfs_queues[i]);
	143	debugfs_queues[i] = NULL;
	144	}
	145	}
	146	}
	147
	148	static struct file_operations debugfs_fops = {
	149	.owner = THIS_MODULE,
	150	.open = qstat_seq_open,
	151	.read = seq_read,
	152	.write = qstat_seq_write,
	153	.llseek = seq_lseek,
	154	.release = single_release,
	155	};
	156
	157	static void setup_debugfs_entry(struct qdio_q q, struct ccw_device cdev)
	158	{
	159	int i = 0;
2c780914	160	char name[QDIO_DEBUGFS_NAME_LEN];
779e6e1c JG	161
	162	while (debugfs_queues[i] != NULL) {
	163	i++;
	164	if (i >= MAX_DEBUGFS_QUEUES)
	165	return;
	166	}
2c780914 JG	167	snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
	168	dev_name(&cdev->dev),
	169	q->is_input_q ? "input" : "output",
	170	q->nr);
779e6e1c JG	171	debugfs_queues[i] = debugfs_create_file(name, S_IFREG \| S_IRUGO \| S_IWUSR,
779e6e1c JG	172	debugfs_root, q, &debugfs_fops);
19cdd08b JG	173	if (IS_ERR(debugfs_queues[i]))
19cdd08b JG	174	debugfs_queues[i] = NULL;
779e6e1c JG	175	}
	176
	177	void qdio_setup_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	178	{
	179	struct qdio_q *q;
	180	int i;
	181
	182	mutex_lock(&debugfs_mutex);
	183	for_each_input_queue(irq_ptr, q, i)
	184	setup_debugfs_entry(q, cdev);
	185	for_each_output_queue(irq_ptr, q, i)
	186	setup_debugfs_entry(q, cdev);
	187	mutex_unlock(&debugfs_mutex);
	188	}
	189
	190	void qdio_shutdown_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	191	{
	192	struct qdio_q *q;
	193	int i;
	194
	195	mutex_lock(&debugfs_mutex);
	196	for_each_input_queue(irq_ptr, q, i)
	197	remove_debugfs_entry(q);
	198	for_each_output_queue(irq_ptr, q, i)
	199	remove_debugfs_entry(q);
	200	mutex_unlock(&debugfs_mutex);
	201	}
	202
	203	int __init qdio_debug_init(void)
	204	{
	205	debugfs_root = debugfs_create_dir("qdio_queues", NULL);
22f99347 JG	206
	207	qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
	208	debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
	209	debug_set_level(qdio_dbf_setup, DBF_INFO);
	210	DBF_EVENT("dbf created\n");
	211
	212	qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
	213	debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
	214	debug_set_level(qdio_dbf_error, DBF_INFO);
	215	DBF_ERROR("dbf created\n");
	216	return 0;
779e6e1c JG	217	}
	218
	219	void qdio_debug_exit(void)
	220	{
	221	debugfs_remove(debugfs_root);
22f99347 JG	222	if (qdio_dbf_setup)
	223	debug_unregister(qdio_dbf_setup);
	224	if (qdio_dbf_error)
	225	debug_unregister(qdio_dbf_error);
779e6e1c	226	}