[GitHub/mt8127/android_kernel_alcatel_ttab.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_trace;

static struct dentry *debugfs_root;
#define MAX_DEBUGFS_QUEUES	32
static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
static DEFINE_MUTEX(debugfs_mutex);

void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
{
	char dbf_text[20];

	sprintf(dbf_text, "qfmt:%x", init_data->q_format);
	QDIO_DBF_TEXT0(0, setup, dbf_text);
	QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
	sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
	QDIO_DBF_TEXT0(0, setup, dbf_text);
	QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
	QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
	QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
	sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
	QDIO_DBF_TEXT0(0, setup, dbf_text);
	sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
	QDIO_DBF_TEXT0(0, setup, dbf_text);
	QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
	QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
	QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
	QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
	QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
	QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
}

static void qdio_unregister_dbf_views(void)
{
	if (qdio_dbf_setup)
		debug_unregister(qdio_dbf_setup);
	if (qdio_dbf_trace)
		debug_unregister(qdio_dbf_trace);
}

static int qdio_register_dbf_views(void)
{
	qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
					QDIO_DBF_SETUP_NR_AREAS,
					QDIO_DBF_SETUP_LEN);
	if (!qdio_dbf_setup)
		goto oom;
	debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
	debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);

	qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
					QDIO_DBF_TRACE_NR_AREAS,
					QDIO_DBF_TRACE_LEN);
	if (!qdio_dbf_trace)
		goto oom;
	debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
	debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
	return 0;
oom:
	qdio_unregister_dbf_views();
	return -ENOMEM;
}

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", *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_ftc: %d\n", q->last_move_ftc);
	seq_printf(m, "polling: %d\n", q->u.in.polling);
	seq_printf(m, "slsb buffer states:\n");

	qdio_siga_sync_q(q);
	for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
		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");
	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 get_queue_name(struct qdio_q *q, struct ccw_device *cdev, char *name)
{
	memset(name, 0, sizeof(name));
	sprintf(name, "%s", dev_name(&cdev->dev));
	if (q->is_input_q)
		sprintf(name + strlen(name), "_input");
	else
		sprintf(name + strlen(name), "_output");
	sprintf(name + strlen(name), "_%d", q->nr);
}

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[40];

	while (debugfs_queues[i] != NULL) {
		i++;
		if (i >= MAX_DEBUGFS_QUEUES)
			return;
	}
	get_queue_name(q, cdev, name);
	debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
						debugfs_root, q, &debugfs_fops);
}

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);
	return qdio_register_dbf_views();
}

void qdio_debug_exit(void)
{
	debugfs_remove(debugfs_root);
	qdio_unregister_dbf_views();
}
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;
	17	debug_info_t *qdio_dbf_trace;
	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);
	23
	24	void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
	25	{
	26	char dbf_text[20];
	27
	28	sprintf(dbf_text, "qfmt:%x", init_data->q_format);
	29	QDIO_DBF_TEXT0(0, setup, dbf_text);
	30	QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
	31	sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
	32	QDIO_DBF_TEXT0(0, setup, dbf_text);
	33	QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
	34	QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
	35	QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
	36	sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
	37	QDIO_DBF_TEXT0(0, setup, dbf_text);
	38	sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
	39	QDIO_DBF_TEXT0(0, setup, dbf_text);
	40	QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
	41	QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
	42	QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
	43	QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
	44	QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
	45	QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
	46	}
	47
	48	static void qdio_unregister_dbf_views(void)
	49	{
	50	if (qdio_dbf_setup)
	51	debug_unregister(qdio_dbf_setup);
	52	if (qdio_dbf_trace)
	53	debug_unregister(qdio_dbf_trace);
	54	}
	55
	56	static int qdio_register_dbf_views(void)
	57	{
	58	qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
	59	QDIO_DBF_SETUP_NR_AREAS,
	60	QDIO_DBF_SETUP_LEN);
	61	if (!qdio_dbf_setup)
	62	goto oom;
	63	debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
	64	debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);
65
66	qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
67	QDIO_DBF_TRACE_NR_AREAS,
68	QDIO_DBF_TRACE_LEN);
69	if (!qdio_dbf_trace)
70	goto oom;
71	debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
72	debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
73	return 0;
74	oom:
75	qdio_unregister_dbf_views();
76	return -ENOMEM;
77	}
78
79	static int qstat_show(struct seq_file m, void v)
80	{
81	unsigned char state;
82	struct qdio_q *q = m->private;
83	int i;
84
85	if (!q)
86	return 0;
87
88	seq_printf(m, "device state indicator: %d\n", *q->irq_ptr->dsci);
89	seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
90	seq_printf(m, "ftc: %d\n", q->first_to_check);
91	seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
92	seq_printf(m, "polling: %d\n", q->u.in.polling);
93	seq_printf(m, "slsb buffer states:\n");
94
95	qdio_siga_sync_q(q);
96	for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
97	get_buf_state(q, i, &state);
98	switch (state) {
99	case SLSB_P_INPUT_NOT_INIT:
100	case SLSB_P_OUTPUT_NOT_INIT:
101	seq_printf(m, "N");
102	break;
103	case SLSB_P_INPUT_PRIMED:
104	case SLSB_CU_OUTPUT_PRIMED:
105	seq_printf(m, "+");
106	break;
107	case SLSB_P_INPUT_ACK:
108	seq_printf(m, "A");
109	break;
110	case SLSB_P_INPUT_ERROR:
111	case SLSB_P_OUTPUT_ERROR:
112	seq_printf(m, "x");
113	break;
114	case SLSB_CU_INPUT_EMPTY:
115	case SLSB_P_OUTPUT_EMPTY:
116	seq_printf(m, "-");
117	break;
118	case SLSB_P_INPUT_HALTED:
119	case SLSB_P_OUTPUT_HALTED:
120	seq_printf(m, ".");
121	break;
122	default:
123	seq_printf(m, "?");
124	}
125	if (i == 63)
126	seq_printf(m, "\n");
127	}
128	seq_printf(m, "\n");
129	return 0;
130	}
131
132	static ssize_t qstat_seq_write(struct file file, const char __user buf,
133	size_t count, loff_t *off)
134	{
135	struct seq_file *seq = file->private_data;
136	struct qdio_q *q = seq->private;
137
138	if (!q)
139	return 0;
140
141	if (q->is_input_q)
142	xchg(q->irq_ptr->dsci, 1);
143	local_bh_disable();
144	tasklet_schedule(&q->tasklet);
145	local_bh_enable();
146	return count;
147	}
148
149	static int qstat_seq_open(struct inode inode, struct file filp)
150	{
151	return single_open(filp, qstat_show,
152	filp->f_path.dentry->d_inode->i_private);
153	}
154
155	static void get_queue_name(struct qdio_q q, struct ccw_device cdev, char *name)
156	{
157	memset(name, 0, sizeof(name));
9286b7ed	158	sprintf(name, "%s", dev_name(&cdev->dev));
779e6e1c JG	159	if (q->is_input_q)
	160	sprintf(name + strlen(name), "_input");
	161	else
	162	sprintf(name + strlen(name), "_output");
	163	sprintf(name + strlen(name), "_%d", q->nr);
	164	}
	165
	166	static void remove_debugfs_entry(struct qdio_q *q)
	167	{
	168	int i;
	169
	170	for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
	171	if (!debugfs_queues[i])
	172	continue;
	173	if (debugfs_queues[i]->d_inode->i_private == q) {
	174	debugfs_remove(debugfs_queues[i]);
	175	debugfs_queues[i] = NULL;
	176	}
	177	}
	178	}
	179
	180	static struct file_operations debugfs_fops = {
	181	.owner = THIS_MODULE,
	182	.open = qstat_seq_open,
	183	.read = seq_read,
	184	.write = qstat_seq_write,
	185	.llseek = seq_lseek,
	186	.release = single_release,
	187	};
	188
	189	static void setup_debugfs_entry(struct qdio_q q, struct ccw_device cdev)
	190	{
	191	int i = 0;
	192	char name[40];
	193
	194	while (debugfs_queues[i] != NULL) {
	195	i++;
	196	if (i >= MAX_DEBUGFS_QUEUES)
	197	return;
	198	}
	199	get_queue_name(q, cdev, name);
	200	debugfs_queues[i] = debugfs_create_file(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	201	debugfs_root, q, &debugfs_fops);
	202	}
	203
	204	void qdio_setup_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	205	{
	206	struct qdio_q *q;
	207	int i;
	208
	209	mutex_lock(&debugfs_mutex);
	210	for_each_input_queue(irq_ptr, q, i)
	211	setup_debugfs_entry(q, cdev);
	212	for_each_output_queue(irq_ptr, q, i)
	213	setup_debugfs_entry(q, cdev);
	214	mutex_unlock(&debugfs_mutex);
	215	}
	216
	217	void qdio_shutdown_debug_entries(struct qdio_irq irq_ptr, struct ccw_device cdev)
	218	{
	219	struct qdio_q *q;
	220	int i;
	221
	222	mutex_lock(&debugfs_mutex);
223	for_each_input_queue(irq_ptr, q, i)
224	remove_debugfs_entry(q);
225	for_each_output_queue(irq_ptr, q, i)
226	remove_debugfs_entry(q);
227	mutex_unlock(&debugfs_mutex);
228	}
229
230	int __init qdio_debug_init(void)
231	{
232	debugfs_root = debugfs_create_dir("qdio_queues", NULL);
233	return qdio_register_dbf_views();
234	}
235
236	void qdio_debug_exit(void)
237	{
238	debugfs_remove(debugfs_root);
239	qdio_unregister_dbf_views();
240	}