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 <asm/debug.h>
11 #include "qdio_debug.h"
14 debug_info_t *qdio_dbf_setup;
15 debug_info_t *qdio_dbf_error;
17 static struct dentry *debugfs_root;
18 #define QDIO_DEBUGFS_NAME_LEN 10
20 void qdio_allocate_dbf(struct qdio_initialize *init_data,
21 struct qdio_irq *irq_ptr)
25 DBF_EVENT("qfmt:%1d", init_data->q_format);
26 DBF_HEX(init_data->adapter_name, 8);
27 DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
28 DBF_HEX(&init_data->qib_param_field, sizeof(void *));
29 DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
30 DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
31 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
32 init_data->no_output_qs);
33 DBF_HEX(&init_data->input_handler, sizeof(void *));
34 DBF_HEX(&init_data->output_handler, sizeof(void *));
35 DBF_HEX(&init_data->int_parm, sizeof(long));
36 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
37 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
38 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
40 /* allocate trace view for the interface */
41 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
42 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
43 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
44 debug_set_level(irq_ptr->debug_area, DBF_WARN);
45 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
48 static int qstat_show(struct seq_file *m, void *v)
51 struct qdio_q *q = m->private;
57 seq_printf(m, "DSCI: %d nr_used: %d\n",
58 *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used));
59 seq_printf(m, "ftc: %d last_move: %d\n", q->first_to_check, q->last_move);
60 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
61 q->u.in.polling, q->u.in.ack_start, q->u.in.ack_count);
62 seq_printf(m, "SBAL states:\n");
63 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
65 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
66 debug_get_buf_state(q, i, &state);
68 case SLSB_P_INPUT_NOT_INIT:
69 case SLSB_P_OUTPUT_NOT_INIT:
72 case SLSB_P_INPUT_PRIMED:
73 case SLSB_CU_OUTPUT_PRIMED:
76 case SLSB_P_INPUT_ACK:
79 case SLSB_P_INPUT_ERROR:
80 case SLSB_P_OUTPUT_ERROR:
83 case SLSB_CU_INPUT_EMPTY:
84 case SLSB_P_OUTPUT_EMPTY:
87 case SLSB_P_INPUT_HALTED:
88 case SLSB_P_OUTPUT_HALTED:
98 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
100 seq_printf(m, "\nSBAL statistics:");
101 if (!q->irq_ptr->perf_stat_enabled) {
102 seq_printf(m, " disabled\n");
106 seq_printf(m, "\n1 2.. 4.. 8.. "
107 "16.. 32.. 64.. 127\n");
108 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
109 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
110 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
111 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
112 q->q_stats.nr_sbal_total);
116 static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
117 size_t count, loff_t *off)
119 struct seq_file *seq = file->private_data;
120 struct qdio_q *q = seq->private;
125 xchg(q->irq_ptr->dsci, 1);
127 tasklet_schedule(&q->tasklet);
132 static int qstat_seq_open(struct inode *inode, struct file *filp)
134 return single_open(filp, qstat_show,
135 filp->f_path.dentry->d_inode->i_private);
138 static const struct file_operations debugfs_fops = {
139 .owner = THIS_MODULE,
140 .open = qstat_seq_open,
142 .write = qstat_seq_write,
144 .release = single_release,
147 static char *qperf_names[] = {
148 "Assumed adapter interrupts",
151 "Inbound tasklet runs",
152 "Inbound tasklet resched",
153 "Inbound tasklet resched2",
154 "Outbound tasklet runs",
160 "Inbound stop_polling",
161 "Inbound queue full",
164 "Outbound fast_requeue",
165 "Outbound target_full",
167 "QEBSM eqbs partial",
172 static int qperf_show(struct seq_file *m, void *v)
174 struct qdio_irq *irq_ptr = m->private;
180 if (!irq_ptr->perf_stat_enabled) {
181 seq_printf(m, "disabled\n");
184 stat = (unsigned int *)&irq_ptr->perf_stat;
186 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
187 seq_printf(m, "%26s:\t%u\n",
188 qperf_names[i], *(stat + i));
192 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
193 size_t count, loff_t *off)
195 struct seq_file *seq = file->private_data;
196 struct qdio_irq *irq_ptr = seq->private;
204 if (count >= sizeof(buf))
206 if (copy_from_user(&buf, ubuf, count))
210 ret = strict_strtoul(buf, 10, &val);
216 irq_ptr->perf_stat_enabled = 0;
217 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
218 for_each_input_queue(irq_ptr, q, i)
219 memset(&q->q_stats, 0, sizeof(q->q_stats));
220 for_each_output_queue(irq_ptr, q, i)
221 memset(&q->q_stats, 0, sizeof(q->q_stats));
224 irq_ptr->perf_stat_enabled = 1;
230 static int qperf_seq_open(struct inode *inode, struct file *filp)
232 return single_open(filp, qperf_show,
233 filp->f_path.dentry->d_inode->i_private);
236 static struct file_operations debugfs_perf_fops = {
237 .owner = THIS_MODULE,
238 .open = qperf_seq_open,
240 .write = qperf_seq_write,
242 .release = single_release,
244 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
246 char name[QDIO_DEBUGFS_NAME_LEN];
248 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
249 q->is_input_q ? "input" : "output",
251 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
252 q->irq_ptr->debugfs_dev, q, &debugfs_fops);
253 if (IS_ERR(q->debugfs_q))
257 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
262 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
264 if (IS_ERR(irq_ptr->debugfs_dev))
265 irq_ptr->debugfs_dev = NULL;
267 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
268 S_IFREG | S_IRUGO | S_IWUSR,
269 irq_ptr->debugfs_dev, irq_ptr,
271 if (IS_ERR(irq_ptr->debugfs_perf))
272 irq_ptr->debugfs_perf = NULL;
274 for_each_input_queue(irq_ptr, q, i)
275 setup_debugfs_entry(q, cdev);
276 for_each_output_queue(irq_ptr, q, i)
277 setup_debugfs_entry(q, cdev);
280 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
285 for_each_input_queue(irq_ptr, q, i)
286 debugfs_remove(q->debugfs_q);
287 for_each_output_queue(irq_ptr, q, i)
288 debugfs_remove(q->debugfs_q);
289 debugfs_remove(irq_ptr->debugfs_perf);
290 debugfs_remove(irq_ptr->debugfs_dev);
293 int __init qdio_debug_init(void)
295 debugfs_root = debugfs_create_dir("qdio", NULL);
297 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
298 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
299 debug_set_level(qdio_dbf_setup, DBF_INFO);
300 DBF_EVENT("dbf created\n");
302 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
303 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
304 debug_set_level(qdio_dbf_error, DBF_INFO);
305 DBF_ERROR("dbf created\n");
309 void qdio_debug_exit(void)
311 debugfs_remove(debugfs_root);
313 debug_unregister(qdio_dbf_setup);
315 debug_unregister(qdio_dbf_error);