[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / cio / qdio_debug.c

/*
 *  drivers/s390/cio/qdio_debug.c
 *
 *  Copyright IBM Corp. 2008,2009
 *
 *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
 */
#include <linux/seq_file.h>
#include <linux/debugfs.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

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");

	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_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 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,
};

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

	snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
		 q->is_input_q ? "input" : "output",
		 q->nr);
	q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
				q->irq_ptr->debugfs_dev, q, &debugfs_fops);
	if (IS_ERR(q->debugfs_q))
		q->debugfs_q = NULL;
}

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

	irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
						  debugfs_root);
	if (IS_ERR(irq_ptr->debugfs_dev))
		irq_ptr->debugfs_dev = NULL;
	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);
}

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

	for_each_input_queue(irq_ptr, q, i)
		debugfs_remove(q->debugfs_q);
	for_each_output_queue(irq_ptr, q, i)
		debugfs_remove(q->debugfs_q);
	debugfs_remove(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)
{
	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	*
3f09bb89	4	* Copyright IBM Corp. 2008,2009
779e6e1c JG	5	*
	6	* Author: Jan Glauber (jang@linux.vnet.ibm.com)
	7	*/
779e6e1c JG	8	#include <linux/seq_file.h>
779e6e1c JG	9	#include <linux/debugfs.h>
779e6e1c JG	10	#include <asm/debug.h>
	11	#include "qdio_debug.h"
	12	#include "qdio.h"
	13
	14	debug_info_t *qdio_dbf_setup;
22f99347	15	debug_info_t *qdio_dbf_error;
779e6e1c JG	16
779e6e1c JG	17	static struct dentry *debugfs_root;
3f09bb89	18	#define QDIO_DEBUGFS_NAME_LEN 10
779e6e1c	19
22f99347 JG	20	void qdio_allocate_dbf(struct qdio_initialize *init_data,
22f99347 JG	21	struct qdio_irq *irq_ptr)
779e6e1c	22	{
22f99347 JG	23	char text[20];
	24
	25	DBF_EVENT("qfmt:%1d", init_data->q_format);
	26	DBF_HEX(init_data->adapter_name, 8);
	27	DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
	28	DBF_HEX(&init_data->qib_param_field, sizeof(void *));
	29	DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
	30	DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
	31	DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
	32	init_data->no_output_qs);
	33	DBF_HEX(&init_data->input_handler, sizeof(void *));
	34	DBF_HEX(&init_data->output_handler, sizeof(void *));
	35	DBF_HEX(&init_data->int_parm, sizeof(long));
	36	DBF_HEX(&init_data->flags, sizeof(long));
	37	DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
	38	DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
	39	DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
	40
	41	/* allocate trace view for the interface */
	42	snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
	43	irq_ptr->debug_area = debug_register(text, 2, 1, 16);
	44	debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
	45	debug_set_level(irq_ptr->debug_area, DBF_WARN);
	46	DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
779e6e1c JG	47	}
	48
	49	static int qstat_show(struct seq_file m, void v)
	50	{
	51	unsigned char state;
	52	struct qdio_q *q = m->private;
	53	int i;
	54
	55	if (!q)
	56	return 0;
	57
50f769df	58	seq_printf(m, "device state indicator: %d\n", (u32 )q->irq_ptr->dsci);
779e6e1c JG	59	seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
779e6e1c JG	60	seq_printf(m, "ftc: %d\n", q->first_to_check);
e85dea0e	61	seq_printf(m, "last_move: %d\n", q->last_move);
779e6e1c	62	seq_printf(m, "polling: %d\n", q->u.in.polling);
e85dea0e	63	seq_printf(m, "ack start: %d\n", q->u.in.ack_start);
50f769df	64	seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
779e6e1c	65	seq_printf(m, "slsb buffer states:\n");
50f769df	66	seq_printf(m, "\|0 \|8 \|16 \|24 \|32 \|40 \|48 \|56 63\|\n");
779e6e1c	67
779e6e1c	68	for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
60b5df2f	69	debug_get_buf_state(q, i, &state);
779e6e1c JG	70	switch (state) {
	71	case SLSB_P_INPUT_NOT_INIT:
	72	case SLSB_P_OUTPUT_NOT_INIT:
	73	seq_printf(m, "N");
	74	break;
	75	case SLSB_P_INPUT_PRIMED:
	76	case SLSB_CU_OUTPUT_PRIMED:
	77	seq_printf(m, "+");
	78	break;
	79	case SLSB_P_INPUT_ACK:
	80	seq_printf(m, "A");
	81	break;
	82	case SLSB_P_INPUT_ERROR:
	83	case SLSB_P_OUTPUT_ERROR:
	84	seq_printf(m, "x");
	85	break;
	86	case SLSB_CU_INPUT_EMPTY:
	87	case SLSB_P_OUTPUT_EMPTY:
	88	seq_printf(m, "-");
	89	break;
	90	case SLSB_P_INPUT_HALTED:
	91	case SLSB_P_OUTPUT_HALTED:
	92	seq_printf(m, ".");
	93	break;
	94	default:
	95	seq_printf(m, "?");
	96	}
	97	if (i == 63)
	98	seq_printf(m, "\n");
	99	}
	100	seq_printf(m, "\n");
50f769df	101	seq_printf(m, "\|64 \|72 \|80 \|88 \|96 \|104 \|112 \| 127\|\n");
779e6e1c JG	102	return 0;
	103	}
	104
	105	static ssize_t qstat_seq_write(struct file file, const char __user buf,
	106	size_t count, loff_t *off)
	107	{
	108	struct seq_file *seq = file->private_data;
	109	struct qdio_q *q = seq->private;
	110
	111	if (!q)
	112	return 0;
	113
	114	if (q->is_input_q)
	115	xchg(q->irq_ptr->dsci, 1);
	116	local_bh_disable();
	117	tasklet_schedule(&q->tasklet);
	118	local_bh_enable();
	119	return count;
	120	}
	121
	122	static int qstat_seq_open(struct inode inode, struct file filp)
	123	{
	124	return single_open(filp, qstat_show,
	125	filp->f_path.dentry->d_inode->i_private);
	126	}
	127
828c0950	128	static const struct file_operations debugfs_fops = {
779e6e1c JG	129	.owner = THIS_MODULE,
	130	.open = qstat_seq_open,
	131	.read = seq_read,
	132	.write = qstat_seq_write,
	133	.llseek = seq_lseek,
	134	.release = single_release,
	135	};
	136
	137	static void setup_debugfs_entry(struct qdio_q q, struct ccw_device cdev)
	138	{
2c780914	139	char name[QDIO_DEBUGFS_NAME_LEN];
779e6e1c	140
3f09bb89	141	snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
2c780914 JG	142	q->is_input_q ? "input" : "output",
2c780914 JG	143	q->nr);
3f09bb89 JG	144	q->debugfs_q = debugfs_create_file(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	145	q->irq_ptr->debugfs_dev, q, &debugfs_fops);
	146	if (IS_ERR(q->debugfs_q))
	147	q->debugfs_q = NULL;
779e6e1c JG	148	}
	149
	150	void qdio_setup_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	151	{
	152	struct qdio_q *q;
	153	int i;
	154
3f09bb89 JG	155	irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
	156	debugfs_root);
	157	if (IS_ERR(irq_ptr->debugfs_dev))
	158	irq_ptr->debugfs_dev = NULL;
779e6e1c JG	159	for_each_input_queue(irq_ptr, q, i)
	160	setup_debugfs_entry(q, cdev);
	161	for_each_output_queue(irq_ptr, q, i)
	162	setup_debugfs_entry(q, cdev);
779e6e1c JG	163	}
	164
	165	void qdio_shutdown_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	166	{
	167	struct qdio_q *q;
	168	int i;
	169
779e6e1c	170	for_each_input_queue(irq_ptr, q, i)
3f09bb89	171	debugfs_remove(q->debugfs_q);
779e6e1c	172	for_each_output_queue(irq_ptr, q, i)
3f09bb89 JG	173	debugfs_remove(q->debugfs_q);
3f09bb89 JG	174	debugfs_remove(irq_ptr->debugfs_dev);
779e6e1c JG	175	}
	176
	177	int __init qdio_debug_init(void)
	178	{
3f09bb89	179	debugfs_root = debugfs_create_dir("qdio", NULL);
22f99347 JG	180
	181	qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
	182	debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
	183	debug_set_level(qdio_dbf_setup, DBF_INFO);
	184	DBF_EVENT("dbf created\n");
	185
	186	qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
	187	debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
	188	debug_set_level(qdio_dbf_error, DBF_INFO);
	189	DBF_ERROR("dbf created\n");
	190	return 0;
779e6e1c JG	191	}
	192
	193	void qdio_debug_exit(void)
	194	{
	195	debugfs_remove(debugfs_root);
22f99347 JG	196	if (qdio_dbf_setup)
	197	debug_unregister(qdio_dbf_setup);
	198	if (qdio_dbf_error)
	199	debug_unregister(qdio_dbf_error);
779e6e1c	200	}