1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2008, 2009
4 *
5 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
6 */
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
16 debug_info_t *qdio_dbf_setup;
17 debug_info_t *qdio_dbf_error;
18
19 static struct dentry *debugfs_root;
20 #define QDIO_DEBUGFS_NAME_LEN 10
21 #define QDIO_DBF_NAME_LEN 20
22
23 struct 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
29 static LIST_HEAD(qdio_dbf_list);
30 static DEFINE_MUTEX(qdio_dbf_list_mutex);
31
qdio_get_dbf_entry(char * name)32 static 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
qdio_clear_dbf_list(void)48 static 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
qdio_allocate_dbf(struct qdio_irq * irq_ptr)61 int 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 /* allocate trace view for the interface */
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 strscpy(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
qstat_show(struct seq_file * m,void * v)99 static 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
178 DEFINE_SHOW_ATTRIBUTE(qstat);
179
ssqd_show(struct seq_file * m,void * v)180 static 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
195 DEFINE_SHOW_ATTRIBUTE(ssqd);
196
197 static char *qperf_names[] = {
198 "Assumed adapter interrupts",
199 "QDIO interrupts",
200 "SIGA read",
201 "SIGA write",
202 "SIGA sync",
203 "Inbound calls",
204 "Inbound stop_polling",
205 "Inbound queue full",
206 "Outbound calls",
207 "Outbound queue full",
208 "Outbound fast_requeue",
209 "Outbound target_full",
210 "QEBSM eqbs",
211 "QEBSM eqbs partial",
212 "QEBSM sqbs",
213 "QEBSM sqbs partial",
214 "Discarded interrupts"
215 };
216
qperf_show(struct seq_file * m,void * v)217 static int qperf_show(struct seq_file *m, void *v)
218 {
219 struct qdio_irq *irq_ptr = m->private;
220 unsigned int *stat;
221 int i;
222
223 if (!irq_ptr)
224 return 0;
225 if (!irq_ptr->perf_stat_enabled) {
226 seq_printf(m, "disabled\n");
227 return 0;
228 }
229 stat = (unsigned int *)&irq_ptr->perf_stat;
230
231 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
232 seq_printf(m, "%26s:\t%u\n",
233 qperf_names[i], *(stat + i));
234 return 0;
235 }
236
qperf_seq_write(struct file * file,const char __user * ubuf,size_t count,loff_t * off)237 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
238 size_t count, loff_t *off)
239 {
240 struct seq_file *seq = file->private_data;
241 struct qdio_irq *irq_ptr = seq->private;
242 struct qdio_q *q;
243 unsigned long val;
244 int ret, i;
245
246 if (!irq_ptr)
247 return 0;
248
249 ret = kstrtoul_from_user(ubuf, count, 10, &val);
250 if (ret)
251 return ret;
252
253 switch (val) {
254 case 0:
255 irq_ptr->perf_stat_enabled = 0;
256 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
257 for_each_input_queue(irq_ptr, q, i)
258 memset(&q->q_stats, 0, sizeof(q->q_stats));
259 for_each_output_queue(irq_ptr, q, i)
260 memset(&q->q_stats, 0, sizeof(q->q_stats));
261 break;
262 case 1:
263 irq_ptr->perf_stat_enabled = 1;
264 break;
265 }
266 return count;
267 }
268
qperf_seq_open(struct inode * inode,struct file * filp)269 static int qperf_seq_open(struct inode *inode, struct file *filp)
270 {
271 return single_open(filp, qperf_show,
272 file_inode(filp)->i_private);
273 }
274
275 static const struct file_operations debugfs_perf_fops = {
276 .owner = THIS_MODULE,
277 .open = qperf_seq_open,
278 .read = seq_read,
279 .write = qperf_seq_write,
280 .llseek = seq_lseek,
281 .release = single_release,
282 };
283
setup_debugfs_entry(struct dentry * parent,struct qdio_q * q)284 static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q)
285 {
286 char name[QDIO_DEBUGFS_NAME_LEN];
287
288 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
289 q->is_input_q ? "input" : "output",
290 q->nr);
291 debugfs_create_file(name, 0444, parent, q, &qstat_fops);
292 }
293
qdio_setup_debug_entries(struct qdio_irq * irq_ptr)294 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr)
295 {
296 struct qdio_q *q;
297 int i;
298
299 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev),
300 debugfs_root);
301 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
302 irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);
303 debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev,
304 &ssqd_fops);
305
306 for_each_input_queue(irq_ptr, q, i)
307 setup_debugfs_entry(irq_ptr->debugfs_dev, q);
308 for_each_output_queue(irq_ptr, q, i)
309 setup_debugfs_entry(irq_ptr->debugfs_dev, q);
310 }
311
qdio_shutdown_debug_entries(struct qdio_irq * irq_ptr)312 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
313 {
314 debugfs_remove_recursive(irq_ptr->debugfs_dev);
315 }
316
qdio_debug_init(void)317 int __init qdio_debug_init(void)
318 {
319 debugfs_root = debugfs_create_dir("qdio", NULL);
320
321 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
322 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
323 debug_set_level(qdio_dbf_setup, DBF_INFO);
324 DBF_EVENT("dbf created\n");
325
326 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
327 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
328 debug_set_level(qdio_dbf_error, DBF_INFO);
329 DBF_ERROR("dbf created\n");
330 return 0;
331 }
332
qdio_debug_exit(void)333 void qdio_debug_exit(void)
334 {
335 qdio_clear_dbf_list();
336 debugfs_remove_recursive(debugfs_root);
337 debug_unregister(qdio_dbf_setup);
338 debug_unregister(qdio_dbf_error);
339 }
340