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7#include <linux/seq_file.h>
8#include <linux/debugfs.h>
9#include <linux/uaccess.h>
10#include <linux/export.h>
11#include <linux/slab.h>
12#include <asm/debug.h>
13#include "qdio_debug.h"
14#include "qdio.h"
15
16debug_info_t *qdio_dbf_setup;
17debug_info_t *qdio_dbf_error;
18
19static struct dentry *debugfs_root;
20#define QDIO_DEBUGFS_NAME_LEN 10
21#define QDIO_DBF_NAME_LEN 20
22
23struct qdio_dbf_entry {
24 char dbf_name[QDIO_DBF_NAME_LEN];
25 debug_info_t *dbf_info;
26 struct list_head dbf_list;
27};
28
29static LIST_HEAD(qdio_dbf_list);
30static DEFINE_MUTEX(qdio_dbf_list_mutex);
31
32static debug_info_t *qdio_get_dbf_entry(char *name)
33{
34 struct qdio_dbf_entry *entry;
35 debug_info_t *rc = NULL;
36
37 mutex_lock(&qdio_dbf_list_mutex);
38 list_for_each_entry(entry, &qdio_dbf_list, dbf_list) {
39 if (strcmp(entry->dbf_name, name) == 0) {
40 rc = entry->dbf_info;
41 break;
42 }
43 }
44 mutex_unlock(&qdio_dbf_list_mutex);
45 return rc;
46}
47
48static void qdio_clear_dbf_list(void)
49{
50 struct qdio_dbf_entry *entry, *tmp;
51
52 mutex_lock(&qdio_dbf_list_mutex);
53 list_for_each_entry_safe(entry, tmp, &qdio_dbf_list, dbf_list) {
54 list_del(&entry->dbf_list);
55 debug_unregister(entry->dbf_info);
56 kfree(entry);
57 }
58 mutex_unlock(&qdio_dbf_list_mutex);
59}
60
61int qdio_allocate_dbf(struct qdio_irq *irq_ptr)
62{
63 char text[QDIO_DBF_NAME_LEN];
64 struct qdio_dbf_entry *new_entry;
65
66 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
67
68
69 snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
70 dev_name(&irq_ptr->cdev->dev));
71 irq_ptr->debug_area = qdio_get_dbf_entry(text);
72 if (irq_ptr->debug_area)
73 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused");
74 else {
75 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
76 if (!irq_ptr->debug_area)
77 return -ENOMEM;
78 if (debug_register_view(irq_ptr->debug_area,
79 &debug_hex_ascii_view)) {
80 debug_unregister(irq_ptr->debug_area);
81 return -ENOMEM;
82 }
83 debug_set_level(irq_ptr->debug_area, DBF_WARN);
84 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
85 new_entry = kzalloc(sizeof(struct qdio_dbf_entry), GFP_KERNEL);
86 if (!new_entry) {
87 debug_unregister(irq_ptr->debug_area);
88 return -ENOMEM;
89 }
90 strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN);
91 new_entry->dbf_info = irq_ptr->debug_area;
92 mutex_lock(&qdio_dbf_list_mutex);
93 list_add(&new_entry->dbf_list, &qdio_dbf_list);
94 mutex_unlock(&qdio_dbf_list_mutex);
95 }
96 return 0;
97}
98
99static int qstat_show(struct seq_file *m, void *v)
100{
101 unsigned char state;
102 struct qdio_q *q = m->private;
103 int i;
104
105 if (!q)
106 return 0;
107
108 seq_printf(m, "Timestamp: %llx\n", q->timestamp);
109 seq_printf(m, "Last Data IRQ: %llx Last AI: %llx\n",
110 q->irq_ptr->last_data_irq_time, last_ai_time);
111 seq_printf(m, "nr_used: %d ftc: %d\n",
112 atomic_read(&q->nr_buf_used), q->first_to_check);
113 if (q->is_input_q) {
114 seq_printf(m, "batch start: %u batch count: %u\n",
115 q->u.in.batch_start, q->u.in.batch_count);
116 seq_printf(m, "DSCI: %x IRQs disabled: %u\n",
117 *(u8 *)q->irq_ptr->dsci,
118 test_bit(QDIO_IRQ_DISABLED,
119 &q->irq_ptr->poll_state));
120 }
121 seq_printf(m, "SBAL states:\n");
122 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
123
124 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
125 debug_get_buf_state(q, i, &state);
126 switch (state) {
127 case SLSB_P_INPUT_NOT_INIT:
128 case SLSB_P_OUTPUT_NOT_INIT:
129 seq_printf(m, "N");
130 break;
131 case SLSB_P_OUTPUT_PENDING:
132 seq_printf(m, "P");
133 break;
134 case SLSB_P_INPUT_PRIMED:
135 case SLSB_CU_OUTPUT_PRIMED:
136 seq_printf(m, "+");
137 break;
138 case SLSB_P_INPUT_ACK:
139 seq_printf(m, "A");
140 break;
141 case SLSB_P_INPUT_ERROR:
142 case SLSB_P_OUTPUT_ERROR:
143 seq_printf(m, "x");
144 break;
145 case SLSB_CU_INPUT_EMPTY:
146 case SLSB_P_OUTPUT_EMPTY:
147 seq_printf(m, "-");
148 break;
149 case SLSB_P_INPUT_HALTED:
150 case SLSB_P_OUTPUT_HALTED:
151 seq_printf(m, ".");
152 break;
153 default:
154 seq_printf(m, "?");
155 }
156 if (i == 63)
157 seq_printf(m, "\n");
158 }
159 seq_printf(m, "\n");
160 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
161
162 seq_printf(m, "\nSBAL statistics:");
163 if (!q->irq_ptr->perf_stat_enabled) {
164 seq_printf(m, " disabled\n");
165 return 0;
166 }
167
168 seq_printf(m, "\n1 2.. 4.. 8.. "
169 "16.. 32.. 64.. 128\n");
170 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
171 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
172 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
173 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
174 q->q_stats.nr_sbal_total);
175 return 0;
176}
177
178DEFINE_SHOW_ATTRIBUTE(qstat);
179
180static int ssqd_show(struct seq_file *m, void *v)
181{
182 struct ccw_device *cdev = m->private;
183 struct qdio_ssqd_desc ssqd;
184 int rc;
185
186 rc = qdio_get_ssqd_desc(cdev, &ssqd);
187 if (rc)
188 return rc;
189
190 seq_hex_dump(m, "", DUMP_PREFIX_NONE, 16, 4, &ssqd, sizeof(ssqd),
191 false);
192 return 0;
193}
194
195DEFINE_SHOW_ATTRIBUTE(ssqd);
196
197static char *qperf_names[] = {
198 "Assumed adapter interrupts",
199 "QDIO interrupts",
200 "Requested PCIs",
201 "Outbound tasklet runs",
202 "SIGA read",
203 "SIGA write",
204 "SIGA sync",
205 "Inbound calls",
206 "Inbound stop_polling",
207 "Inbound queue full",
208 "Outbound calls",
209 "Outbound handler",
210 "Outbound queue full",
211 "Outbound fast_requeue",
212 "Outbound target_full",
213 "QEBSM eqbs",
214 "QEBSM eqbs partial",
215 "QEBSM sqbs",
216 "QEBSM sqbs partial",
217 "Discarded interrupts"
218};
219
220static int qperf_show(struct seq_file *m, void *v)
221{
222 struct qdio_irq *irq_ptr = m->private;
223 unsigned int *stat;
224 int i;
225
226 if (!irq_ptr)
227 return 0;
228 if (!irq_ptr->perf_stat_enabled) {
229 seq_printf(m, "disabled\n");
230 return 0;
231 }
232 stat = (unsigned int *)&irq_ptr->perf_stat;
233
234 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
235 seq_printf(m, "%26s:\t%u\n",
236 qperf_names[i], *(stat + i));
237 return 0;
238}
239
240static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
241 size_t count, loff_t *off)
242{
243 struct seq_file *seq = file->private_data;
244 struct qdio_irq *irq_ptr = seq->private;
245 struct qdio_q *q;
246 unsigned long val;
247 int ret, i;
248
249 if (!irq_ptr)
250 return 0;
251
252 ret = kstrtoul_from_user(ubuf, count, 10, &val);
253 if (ret)
254 return ret;
255
256 switch (val) {
257 case 0:
258 irq_ptr->perf_stat_enabled = 0;
259 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
260 for_each_input_queue(irq_ptr, q, i)
261 memset(&q->q_stats, 0, sizeof(q->q_stats));
262 for_each_output_queue(irq_ptr, q, i)
263 memset(&q->q_stats, 0, sizeof(q->q_stats));
264 break;
265 case 1:
266 irq_ptr->perf_stat_enabled = 1;
267 break;
268 }
269 return count;
270}
271
272static int qperf_seq_open(struct inode *inode, struct file *filp)
273{
274 return single_open(filp, qperf_show,
275 file_inode(filp)->i_private);
276}
277
278static const struct file_operations debugfs_perf_fops = {
279 .owner = THIS_MODULE,
280 .open = qperf_seq_open,
281 .read = seq_read,
282 .write = qperf_seq_write,
283 .llseek = seq_lseek,
284 .release = single_release,
285};
286
287static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q)
288{
289 char name[QDIO_DEBUGFS_NAME_LEN];
290
291 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
292 q->is_input_q ? "input" : "output",
293 q->nr);
294 debugfs_create_file(name, 0444, parent, q, &qstat_fops);
295}
296
297void qdio_setup_debug_entries(struct qdio_irq *irq_ptr)
298{
299 struct qdio_q *q;
300 int i;
301
302 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev),
303 debugfs_root);
304 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
305 irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);
306 debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev,
307 &ssqd_fops);
308
309 for_each_input_queue(irq_ptr, q, i)
310 setup_debugfs_entry(irq_ptr->debugfs_dev, q);
311 for_each_output_queue(irq_ptr, q, i)
312 setup_debugfs_entry(irq_ptr->debugfs_dev, q);
313}
314
315void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
316{
317 debugfs_remove_recursive(irq_ptr->debugfs_dev);
318}
319
320int __init qdio_debug_init(void)
321{
322 debugfs_root = debugfs_create_dir("qdio", NULL);
323
324 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
325 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
326 debug_set_level(qdio_dbf_setup, DBF_INFO);
327 DBF_EVENT("dbf created\n");
328
329 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
330 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
331 debug_set_level(qdio_dbf_error, DBF_INFO);
332 DBF_ERROR("dbf created\n");
333 return 0;
334}
335
336void qdio_debug_exit(void)
337{
338 qdio_clear_dbf_list();
339 debugfs_remove_recursive(debugfs_root);
340 debug_unregister(qdio_dbf_setup);
341 debug_unregister(qdio_dbf_error);
342}
343