2 * drivers/s390/cio/qdio_debug.c
4 * Copyright IBM Corp. 2008,2009
6 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
8 #include <linux/seq_file.h>
9 #include <linux/debugfs.h>
10 #include <linux/uaccess.h>
11 #include <linux/export.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
22 void qdio_allocate_dbf(struct qdio_initialize *init_data,
23 struct qdio_irq *irq_ptr)
27 DBF_EVENT("qfmt:%1d", init_data->q_format);
28 DBF_HEX(init_data->adapter_name, 8);
29 DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
30 DBF_HEX(&init_data->qib_param_field, sizeof(void *));
31 DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
32 DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
33 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
34 init_data->no_output_qs);
35 DBF_HEX(&init_data->input_handler, sizeof(void *));
36 DBF_HEX(&init_data->output_handler, sizeof(void *));
37 DBF_HEX(&init_data->int_parm, sizeof(long));
38 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
39 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
40 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
42 /* allocate trace view for the interface */
43 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
44 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
45 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
46 debug_set_level(irq_ptr->debug_area, DBF_WARN);
47 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
50 static int qstat_show(struct seq_file *m, void *v)
53 struct qdio_q *q = m->private;
59 seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
60 q->timestamp, last_ai_time);
61 seq_printf(m, "nr_used: %d ftc: %d last_move: %d\n",
62 atomic_read(&q->nr_buf_used),
63 q->first_to_check, q->last_move);
65 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
66 q->u.in.polling, q->u.in.ack_start,
68 seq_printf(m, "DSCI: %d IRQs disabled: %u\n",
69 *(u32 *)q->irq_ptr->dsci,
70 test_bit(QDIO_QUEUE_IRQS_DISABLED,
71 &q->u.in.queue_irq_state));
73 seq_printf(m, "SBAL states:\n");
74 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
76 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
77 debug_get_buf_state(q, i, &state);
79 case SLSB_P_INPUT_NOT_INIT:
80 case SLSB_P_OUTPUT_NOT_INIT:
83 case SLSB_P_OUTPUT_PENDING:
86 case SLSB_P_INPUT_PRIMED:
87 case SLSB_CU_OUTPUT_PRIMED:
90 case SLSB_P_INPUT_ACK:
93 case SLSB_P_INPUT_ERROR:
94 case SLSB_P_OUTPUT_ERROR:
97 case SLSB_CU_INPUT_EMPTY:
98 case SLSB_P_OUTPUT_EMPTY:
101 case SLSB_P_INPUT_HALTED:
102 case SLSB_P_OUTPUT_HALTED:
112 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
114 seq_printf(m, "\nSBAL statistics:");
115 if (!q->irq_ptr->perf_stat_enabled) {
116 seq_printf(m, " disabled\n");
120 seq_printf(m, "\n1 2.. 4.. 8.. "
121 "16.. 32.. 64.. 127\n");
122 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
123 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
124 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
125 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
126 q->q_stats.nr_sbal_total);
130 static int qstat_seq_open(struct inode *inode, struct file *filp)
132 return single_open(filp, qstat_show,
133 filp->f_path.dentry->d_inode->i_private);
136 static const struct file_operations debugfs_fops = {
137 .owner = THIS_MODULE,
138 .open = qstat_seq_open,
141 .release = single_release,
144 static char *qperf_names[] = {
145 "Assumed adapter interrupts",
148 "Inbound tasklet runs",
149 "Inbound tasklet resched",
150 "Inbound tasklet resched2",
151 "Outbound tasklet runs",
157 "Inbound stop_polling",
158 "Inbound queue full",
161 "Outbound queue full",
162 "Outbound fast_requeue",
163 "Outbound target_full",
165 "QEBSM eqbs partial",
167 "QEBSM sqbs partial",
168 "Discarded interrupts"
171 static int qperf_show(struct seq_file *m, void *v)
173 struct qdio_irq *irq_ptr = m->private;
179 if (!irq_ptr->perf_stat_enabled) {
180 seq_printf(m, "disabled\n");
183 stat = (unsigned int *)&irq_ptr->perf_stat;
185 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
186 seq_printf(m, "%26s:\t%u\n",
187 qperf_names[i], *(stat + i));
191 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
192 size_t count, loff_t *off)
194 struct seq_file *seq = file->private_data;
195 struct qdio_irq *irq_ptr = seq->private;
203 ret = kstrtoul_from_user(ubuf, count, 10, &val);
209 irq_ptr->perf_stat_enabled = 0;
210 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
211 for_each_input_queue(irq_ptr, q, i)
212 memset(&q->q_stats, 0, sizeof(q->q_stats));
213 for_each_output_queue(irq_ptr, q, i)
214 memset(&q->q_stats, 0, sizeof(q->q_stats));
217 irq_ptr->perf_stat_enabled = 1;
223 static int qperf_seq_open(struct inode *inode, struct file *filp)
225 return single_open(filp, qperf_show,
226 filp->f_path.dentry->d_inode->i_private);
229 static struct file_operations debugfs_perf_fops = {
230 .owner = THIS_MODULE,
231 .open = qperf_seq_open,
233 .write = qperf_seq_write,
235 .release = single_release,
237 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
239 char name[QDIO_DEBUGFS_NAME_LEN];
241 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
242 q->is_input_q ? "input" : "output",
244 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
245 q->irq_ptr->debugfs_dev, q, &debugfs_fops);
246 if (IS_ERR(q->debugfs_q))
250 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
255 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
257 if (IS_ERR(irq_ptr->debugfs_dev))
258 irq_ptr->debugfs_dev = NULL;
260 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
261 S_IFREG | S_IRUGO | S_IWUSR,
262 irq_ptr->debugfs_dev, irq_ptr,
264 if (IS_ERR(irq_ptr->debugfs_perf))
265 irq_ptr->debugfs_perf = NULL;
267 for_each_input_queue(irq_ptr, q, i)
268 setup_debugfs_entry(q, cdev);
269 for_each_output_queue(irq_ptr, q, i)
270 setup_debugfs_entry(q, cdev);
273 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
278 for_each_input_queue(irq_ptr, q, i)
279 debugfs_remove(q->debugfs_q);
280 for_each_output_queue(irq_ptr, q, i)
281 debugfs_remove(q->debugfs_q);
282 debugfs_remove(irq_ptr->debugfs_perf);
283 debugfs_remove(irq_ptr->debugfs_dev);
286 int __init qdio_debug_init(void)
288 debugfs_root = debugfs_create_dir("qdio", NULL);
290 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
291 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
292 debug_set_level(qdio_dbf_setup, DBF_INFO);
293 DBF_EVENT("dbf created\n");
295 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
296 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
297 debug_set_level(qdio_dbf_error, DBF_INFO);
298 DBF_ERROR("dbf created\n");
302 void qdio_debug_exit(void)
304 debugfs_remove(debugfs_root);
306 debug_unregister(qdio_dbf_setup);
308 debug_unregister(qdio_dbf_error);