summaryrefslogtreecommitdiffstats
path: root/drivers/s390/cio/qdio_debug.c
blob: 0e615cb912d0eb0a90a2d510b5814d3586b06297 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
/*
 *  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->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, "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);
	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, "IRQs disabled: %u\n",
			   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++) {
		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");

	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..       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);
}

static const struct file_operations debugfs_fops = {
	.owner	 = THIS_MODULE,
	.open	 = qstat_seq_open,
	.read	 = seq_read,
	.llseek  = seq_lseek,
	.release = single_release,
};

static char *qperf_names[] = {
	"Assumed adapter interrupts",
	"QDIO interrupts",
	"Requested PCIs",
	"Inbound tasklet runs",
	"Inbound tasklet resched",
	"Inbound tasklet resched2",
	"Outbound tasklet runs",
	"SIGA read",
	"SIGA write",
	"SIGA sync",
	"Inbound calls",
	"Inbound handler",
	"Inbound stop_polling",
	"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",
	"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,
			   filp->f_path.dentry->d_inode->i_private);
}

static 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 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;

	irq_ptr->debugfs_perf = debugfs_create_file("statistics",
				S_IFREG | S_IRUGO | S_IWUSR,
				irq_ptr->debugfs_dev, irq_ptr,
				&debugfs_perf_fops);
	if (IS_ERR(irq_ptr->debugfs_perf))
		irq_ptr->debugfs_perf = 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_perf);
	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);
}
OpenPOWER on IntegriCloud