2 * Copyright IBM Corp. 2008, 2009
4 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
6 #include <linux/seq_file.h>
7 #include <linux/debugfs.h>
8 #include <linux/uaccess.h>
9 #include <linux/export.h>
10 #include <linux/slab.h>
11 #include <asm/debug.h>
12 #include "qdio_debug.h"
15 debug_info_t *qdio_dbf_setup;
16 debug_info_t *qdio_dbf_error;
18 static struct dentry *debugfs_root;
19 #define QDIO_DEBUGFS_NAME_LEN 10
20 #define QDIO_DBF_NAME_LEN 20
22 struct qdio_dbf_entry {
23 char dbf_name[QDIO_DBF_NAME_LEN];
24 debug_info_t *dbf_info;
25 struct list_head dbf_list;
28 static LIST_HEAD(qdio_dbf_list);
29 static DEFINE_MUTEX(qdio_dbf_list_mutex);
31 static debug_info_t *qdio_get_dbf_entry(char *name)
33 struct qdio_dbf_entry *entry;
34 debug_info_t *rc = NULL;
36 mutex_lock(&qdio_dbf_list_mutex);
37 list_for_each_entry(entry, &qdio_dbf_list, dbf_list) {
38 if (strcmp(entry->dbf_name, name) == 0) {
43 mutex_unlock(&qdio_dbf_list_mutex);
47 static void qdio_clear_dbf_list(void)
49 struct qdio_dbf_entry *entry, *tmp;
51 mutex_lock(&qdio_dbf_list_mutex);
52 list_for_each_entry_safe(entry, tmp, &qdio_dbf_list, dbf_list) {
53 list_del(&entry->dbf_list);
54 debug_unregister(entry->dbf_info);
57 mutex_unlock(&qdio_dbf_list_mutex);
60 int qdio_allocate_dbf(struct qdio_initialize *init_data,
61 struct qdio_irq *irq_ptr)
63 char text[QDIO_DBF_NAME_LEN];
64 struct qdio_dbf_entry *new_entry;
66 DBF_EVENT("qfmt:%1d", init_data->q_format);
67 DBF_HEX(init_data->adapter_name, 8);
68 DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
69 DBF_HEX(&init_data->qib_param_field, sizeof(void *));
70 DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
71 DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
72 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
73 init_data->no_output_qs);
74 DBF_HEX(&init_data->input_handler, sizeof(void *));
75 DBF_HEX(&init_data->output_handler, sizeof(void *));
76 DBF_HEX(&init_data->int_parm, sizeof(long));
77 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
78 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
79 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
81 /* allocate trace view for the interface */
82 snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
83 dev_name(&init_data->cdev->dev));
84 irq_ptr->debug_area = qdio_get_dbf_entry(text);
85 if (irq_ptr->debug_area)
86 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused");
88 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
89 if (!irq_ptr->debug_area)
91 if (debug_register_view(irq_ptr->debug_area,
92 &debug_hex_ascii_view)) {
93 debug_unregister(irq_ptr->debug_area);
96 debug_set_level(irq_ptr->debug_area, DBF_WARN);
97 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
98 new_entry = kzalloc(sizeof(struct qdio_dbf_entry), GFP_KERNEL);
100 debug_unregister(irq_ptr->debug_area);
103 strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN);
104 new_entry->dbf_info = irq_ptr->debug_area;
105 mutex_lock(&qdio_dbf_list_mutex);
106 list_add(&new_entry->dbf_list, &qdio_dbf_list);
107 mutex_unlock(&qdio_dbf_list_mutex);
112 static int qstat_show(struct seq_file *m, void *v)
115 struct qdio_q *q = m->private;
121 seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
122 q->timestamp, last_ai_time);
123 seq_printf(m, "nr_used: %d ftc: %d last_move: %d\n",
124 atomic_read(&q->nr_buf_used),
125 q->first_to_check, q->last_move);
127 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
128 q->u.in.polling, q->u.in.ack_start,
130 seq_printf(m, "DSCI: %d IRQs disabled: %u\n",
131 *(u32 *)q->irq_ptr->dsci,
132 test_bit(QDIO_QUEUE_IRQS_DISABLED,
133 &q->u.in.queue_irq_state));
135 seq_printf(m, "SBAL states:\n");
136 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
138 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
139 debug_get_buf_state(q, i, &state);
141 case SLSB_P_INPUT_NOT_INIT:
142 case SLSB_P_OUTPUT_NOT_INIT:
145 case SLSB_P_OUTPUT_PENDING:
148 case SLSB_P_INPUT_PRIMED:
149 case SLSB_CU_OUTPUT_PRIMED:
152 case SLSB_P_INPUT_ACK:
155 case SLSB_P_INPUT_ERROR:
156 case SLSB_P_OUTPUT_ERROR:
159 case SLSB_CU_INPUT_EMPTY:
160 case SLSB_P_OUTPUT_EMPTY:
163 case SLSB_P_INPUT_HALTED:
164 case SLSB_P_OUTPUT_HALTED:
174 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
176 seq_printf(m, "\nSBAL statistics:");
177 if (!q->irq_ptr->perf_stat_enabled) {
178 seq_printf(m, " disabled\n");
182 seq_printf(m, "\n1 2.. 4.. 8.. "
183 "16.. 32.. 64.. 127\n");
184 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
185 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
186 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
187 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
188 q->q_stats.nr_sbal_total);
192 static int qstat_seq_open(struct inode *inode, struct file *filp)
194 return single_open(filp, qstat_show,
195 file_inode(filp)->i_private);
198 static const struct file_operations debugfs_fops = {
199 .owner = THIS_MODULE,
200 .open = qstat_seq_open,
203 .release = single_release,
206 static char *qperf_names[] = {
207 "Assumed adapter interrupts",
210 "Inbound tasklet runs",
211 "Inbound tasklet resched",
212 "Inbound tasklet resched2",
213 "Outbound tasklet runs",
219 "Inbound stop_polling",
220 "Inbound queue full",
223 "Outbound queue full",
224 "Outbound fast_requeue",
225 "Outbound target_full",
227 "QEBSM eqbs partial",
229 "QEBSM sqbs partial",
230 "Discarded interrupts"
233 static int qperf_show(struct seq_file *m, void *v)
235 struct qdio_irq *irq_ptr = m->private;
241 if (!irq_ptr->perf_stat_enabled) {
242 seq_printf(m, "disabled\n");
245 stat = (unsigned int *)&irq_ptr->perf_stat;
247 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
248 seq_printf(m, "%26s:\t%u\n",
249 qperf_names[i], *(stat + i));
253 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
254 size_t count, loff_t *off)
256 struct seq_file *seq = file->private_data;
257 struct qdio_irq *irq_ptr = seq->private;
265 ret = kstrtoul_from_user(ubuf, count, 10, &val);
271 irq_ptr->perf_stat_enabled = 0;
272 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
273 for_each_input_queue(irq_ptr, q, i)
274 memset(&q->q_stats, 0, sizeof(q->q_stats));
275 for_each_output_queue(irq_ptr, q, i)
276 memset(&q->q_stats, 0, sizeof(q->q_stats));
279 irq_ptr->perf_stat_enabled = 1;
285 static int qperf_seq_open(struct inode *inode, struct file *filp)
287 return single_open(filp, qperf_show,
288 file_inode(filp)->i_private);
291 static const struct file_operations debugfs_perf_fops = {
292 .owner = THIS_MODULE,
293 .open = qperf_seq_open,
295 .write = qperf_seq_write,
297 .release = single_release,
300 static void setup_debugfs_entry(struct qdio_q *q)
302 char name[QDIO_DEBUGFS_NAME_LEN];
304 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
305 q->is_input_q ? "input" : "output",
307 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
308 q->irq_ptr->debugfs_dev, q, &debugfs_fops);
309 if (IS_ERR(q->debugfs_q))
313 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
318 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
320 if (IS_ERR(irq_ptr->debugfs_dev))
321 irq_ptr->debugfs_dev = NULL;
323 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
324 S_IFREG | S_IRUGO | S_IWUSR,
325 irq_ptr->debugfs_dev, irq_ptr,
327 if (IS_ERR(irq_ptr->debugfs_perf))
328 irq_ptr->debugfs_perf = NULL;
330 for_each_input_queue(irq_ptr, q, i)
331 setup_debugfs_entry(q);
332 for_each_output_queue(irq_ptr, q, i)
333 setup_debugfs_entry(q);
336 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
341 for_each_input_queue(irq_ptr, q, i)
342 debugfs_remove(q->debugfs_q);
343 for_each_output_queue(irq_ptr, q, i)
344 debugfs_remove(q->debugfs_q);
345 debugfs_remove(irq_ptr->debugfs_perf);
346 debugfs_remove(irq_ptr->debugfs_dev);
349 int __init qdio_debug_init(void)
351 debugfs_root = debugfs_create_dir("qdio", NULL);
353 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
354 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
355 debug_set_level(qdio_dbf_setup, DBF_INFO);
356 DBF_EVENT("dbf created\n");
358 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
359 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
360 debug_set_level(qdio_dbf_error, DBF_INFO);
361 DBF_ERROR("dbf created\n");
365 void qdio_debug_exit(void)
367 qdio_clear_dbf_list();
368 debugfs_remove(debugfs_root);
370 debug_unregister(qdio_dbf_setup);
372 debug_unregister(qdio_dbf_error);