1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright IBM Corp. 2008, 2009
5 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
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"
16 debug_info_t *qdio_dbf_setup;
17 debug_info_t *qdio_dbf_error;
19 static struct dentry *debugfs_root;
20 #define QDIO_DEBUGFS_NAME_LEN 10
21 #define QDIO_DBF_NAME_LEN 20
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;
29 static LIST_HEAD(qdio_dbf_list);
30 static DEFINE_MUTEX(qdio_dbf_list_mutex);
32 static debug_info_t *qdio_get_dbf_entry(char *name)
34 struct qdio_dbf_entry *entry;
35 debug_info_t *rc = NULL;
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) {
44 mutex_unlock(&qdio_dbf_list_mutex);
48 static void qdio_clear_dbf_list(void)
50 struct qdio_dbf_entry *entry, *tmp;
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);
58 mutex_unlock(&qdio_dbf_list_mutex);
61 int qdio_allocate_dbf(struct qdio_initialize *init_data,
62 struct qdio_irq *irq_ptr)
64 char text[QDIO_DBF_NAME_LEN];
65 struct qdio_dbf_entry *new_entry;
67 DBF_EVENT("qfmt:%1d", init_data->q_format);
68 DBF_HEX(init_data->adapter_name, 8);
69 DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
70 DBF_HEX(&init_data->qib_param_field, sizeof(void *));
71 DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
72 DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
73 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
74 init_data->no_output_qs);
75 DBF_HEX(&init_data->input_handler, sizeof(void *));
76 DBF_HEX(&init_data->output_handler, sizeof(void *));
77 DBF_HEX(&init_data->int_parm, sizeof(long));
78 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
79 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
80 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
82 /* allocate trace view for the interface */
83 snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s",
84 dev_name(&init_data->cdev->dev));
85 irq_ptr->debug_area = qdio_get_dbf_entry(text);
86 if (irq_ptr->debug_area)
87 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused");
89 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
90 if (!irq_ptr->debug_area)
92 if (debug_register_view(irq_ptr->debug_area,
93 &debug_hex_ascii_view)) {
94 debug_unregister(irq_ptr->debug_area);
97 debug_set_level(irq_ptr->debug_area, DBF_WARN);
98 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
99 new_entry = kzalloc(sizeof(struct qdio_dbf_entry), GFP_KERNEL);
101 debug_unregister(irq_ptr->debug_area);
104 strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN);
105 new_entry->dbf_info = irq_ptr->debug_area;
106 mutex_lock(&qdio_dbf_list_mutex);
107 list_add(&new_entry->dbf_list, &qdio_dbf_list);
108 mutex_unlock(&qdio_dbf_list_mutex);
113 static int qstat_show(struct seq_file *m, void *v)
116 struct qdio_q *q = m->private;
122 seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
123 q->timestamp, last_ai_time);
124 seq_printf(m, "nr_used: %d ftc: %d\n",
125 atomic_read(&q->nr_buf_used), q->first_to_check);
127 seq_printf(m, "ack start: %d ack count: %d\n",
128 q->u.in.ack_start, q->u.in.ack_count);
129 seq_printf(m, "DSCI: %x IRQs disabled: %u\n",
130 *(u8 *)q->irq_ptr->dsci,
131 test_bit(QDIO_QUEUE_IRQS_DISABLED,
132 &q->u.in.queue_irq_state));
134 seq_printf(m, "SBAL states:\n");
135 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
137 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
138 debug_get_buf_state(q, i, &state);
140 case SLSB_P_INPUT_NOT_INIT:
141 case SLSB_P_OUTPUT_NOT_INIT:
144 case SLSB_P_OUTPUT_PENDING:
147 case SLSB_P_INPUT_PRIMED:
148 case SLSB_CU_OUTPUT_PRIMED:
151 case SLSB_P_INPUT_ACK:
154 case SLSB_P_INPUT_ERROR:
155 case SLSB_P_OUTPUT_ERROR:
158 case SLSB_CU_INPUT_EMPTY:
159 case SLSB_P_OUTPUT_EMPTY:
162 case SLSB_P_INPUT_HALTED:
163 case SLSB_P_OUTPUT_HALTED:
173 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
175 seq_printf(m, "\nSBAL statistics:");
176 if (!q->irq_ptr->perf_stat_enabled) {
177 seq_printf(m, " disabled\n");
181 seq_printf(m, "\n1 2.. 4.. 8.. "
182 "16.. 32.. 64.. 127\n");
183 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
184 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
185 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
186 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
187 q->q_stats.nr_sbal_total);
191 DEFINE_SHOW_ATTRIBUTE(qstat);
193 static char *qperf_names[] = {
194 "Assumed adapter interrupts",
197 "Inbound tasklet runs",
198 "Inbound tasklet resched",
199 "Inbound tasklet resched2",
200 "Outbound tasklet runs",
206 "Inbound stop_polling",
207 "Inbound queue full",
210 "Outbound queue full",
211 "Outbound fast_requeue",
212 "Outbound target_full",
214 "QEBSM eqbs partial",
216 "QEBSM sqbs partial",
217 "Discarded interrupts"
220 static int qperf_show(struct seq_file *m, void *v)
222 struct qdio_irq *irq_ptr = m->private;
228 if (!irq_ptr->perf_stat_enabled) {
229 seq_printf(m, "disabled\n");
232 stat = (unsigned int *)&irq_ptr->perf_stat;
234 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
235 seq_printf(m, "%26s:\t%u\n",
236 qperf_names[i], *(stat + i));
240 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
241 size_t count, loff_t *off)
243 struct seq_file *seq = file->private_data;
244 struct qdio_irq *irq_ptr = seq->private;
252 ret = kstrtoul_from_user(ubuf, count, 10, &val);
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));
266 irq_ptr->perf_stat_enabled = 1;
272 static int qperf_seq_open(struct inode *inode, struct file *filp)
274 return single_open(filp, qperf_show,
275 file_inode(filp)->i_private);
278 static const struct file_operations debugfs_perf_fops = {
279 .owner = THIS_MODULE,
280 .open = qperf_seq_open,
282 .write = qperf_seq_write,
284 .release = single_release,
287 static void setup_debugfs_entry(struct qdio_q *q)
289 char name[QDIO_DEBUGFS_NAME_LEN];
291 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
292 q->is_input_q ? "input" : "output",
294 q->debugfs_q = debugfs_create_file(name, 0444,
295 q->irq_ptr->debugfs_dev, q, &qstat_fops);
296 if (IS_ERR(q->debugfs_q))
300 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
305 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
307 if (IS_ERR(irq_ptr->debugfs_dev))
308 irq_ptr->debugfs_dev = NULL;
310 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
311 S_IFREG | S_IRUGO | S_IWUSR,
312 irq_ptr->debugfs_dev, irq_ptr,
314 if (IS_ERR(irq_ptr->debugfs_perf))
315 irq_ptr->debugfs_perf = NULL;
317 for_each_input_queue(irq_ptr, q, i)
318 setup_debugfs_entry(q);
319 for_each_output_queue(irq_ptr, q, i)
320 setup_debugfs_entry(q);
323 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)
328 for_each_input_queue(irq_ptr, q, i)
329 debugfs_remove(q->debugfs_q);
330 for_each_output_queue(irq_ptr, q, i)
331 debugfs_remove(q->debugfs_q);
332 debugfs_remove(irq_ptr->debugfs_perf);
333 debugfs_remove(irq_ptr->debugfs_dev);
336 int __init qdio_debug_init(void)
338 debugfs_root = debugfs_create_dir("qdio", NULL);
340 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
341 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
342 debug_set_level(qdio_dbf_setup, DBF_INFO);
343 DBF_EVENT("dbf created\n");
345 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
346 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
347 debug_set_level(qdio_dbf_error, DBF_INFO);
348 DBF_ERROR("dbf created\n");
352 void qdio_debug_exit(void)
354 qdio_clear_dbf_list();
355 debugfs_remove(debugfs_root);
356 debug_unregister(qdio_dbf_setup);
357 debug_unregister(qdio_dbf_error);