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->flags, sizeof(long));
37 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
38 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
39 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
41 /* allocate trace view for the interface */
42 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
43 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
44 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
45 debug_set_level(irq_ptr->debug_area, DBF_WARN);
46 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
49 static int qstat_show(struct seq_file *m, void *v)
52 struct qdio_q *q = m->private;
58 seq_printf(m, "DSCI: %d nr_used: %d\n",
59 *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used));
60 seq_printf(m, "ftc: %d last_move: %d\n", q->first_to_check, q->last_move);
61 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
62 q->u.in.polling, q->u.in.ack_start, q->u.in.ack_count);
63 seq_printf(m, "slsb buffer states:\n");
64 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
66 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
67 debug_get_buf_state(q, i, &state);
69 case SLSB_P_INPUT_NOT_INIT:
70 case SLSB_P_OUTPUT_NOT_INIT:
73 case SLSB_P_INPUT_PRIMED:
74 case SLSB_CU_OUTPUT_PRIMED:
77 case SLSB_P_INPUT_ACK:
80 case SLSB_P_INPUT_ERROR:
81 case SLSB_P_OUTPUT_ERROR:
84 case SLSB_CU_INPUT_EMPTY:
85 case SLSB_P_OUTPUT_EMPTY:
88 case SLSB_P_INPUT_HALTED:
89 case SLSB_P_OUTPUT_HALTED:
99 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
103 static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
104 size_t count, loff_t *off)
106 struct seq_file *seq = file->private_data;
107 struct qdio_q *q = seq->private;
112 xchg(q->irq_ptr->dsci, 1);
114 tasklet_schedule(&q->tasklet);
119 static int qstat_seq_open(struct inode *inode, struct file *filp)
121 return single_open(filp, qstat_show,
122 filp->f_path.dentry->d_inode->i_private);
125 static const struct file_operations debugfs_fops = {
126 .owner = THIS_MODULE,
127 .open = qstat_seq_open,
129 .write = qstat_seq_write,
131 .release = single_release,
134 static char *qperf_names[] = {
135 "Assumed adapter interrupts",
138 "Inbound tasklet runs",
139 "Inbound tasklet resched",
140 "Inbound tasklet resched2",
141 "Outbound tasklet runs",
147 "Inbound stop_polling",
148 "Inbound queue full",
151 "Outbound fast_requeue",
152 "Outbound target_full",
154 "QEBSM eqbs partial",
159 static int qperf_show(struct seq_file *m, void *v)
161 struct qdio_irq *irq_ptr = m->private;
167 if (!irq_ptr->perf_stat_enabled) {
168 seq_printf(m, "disabled\n");
171 stat = (unsigned int *)&irq_ptr->perf_stat;
173 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
174 seq_printf(m, "%26s:\t%u\n",
175 qperf_names[i], *(stat + i));
179 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
180 size_t count, loff_t *off)
182 struct seq_file *seq = file->private_data;
183 struct qdio_irq *irq_ptr = seq->private;
190 if (count >= sizeof(buf))
192 if (copy_from_user(&buf, ubuf, count))
196 ret = strict_strtoul(buf, 10, &val);
202 irq_ptr->perf_stat_enabled = 0;
203 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
206 irq_ptr->perf_stat_enabled = 1;
212 static int qperf_seq_open(struct inode *inode, struct file *filp)
214 return single_open(filp, qperf_show,
215 filp->f_path.dentry->d_inode->i_private);
218 static struct file_operations debugfs_perf_fops = {
219 .owner = THIS_MODULE,
220 .open = qperf_seq_open,
222 .write = qperf_seq_write,
224 .release = single_release,
226 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
228 char name[QDIO_DEBUGFS_NAME_LEN];
230 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
231 q->is_input_q ? "input" : "output",
233 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
234 q->irq_ptr->debugfs_dev, q, &debugfs_fops);
235 if (IS_ERR(q->debugfs_q))
239 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
244 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
246 if (IS_ERR(irq_ptr->debugfs_dev))
247 irq_ptr->debugfs_dev = NULL;
249 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
250 S_IFREG | S_IRUGO | S_IWUSR,
251 irq_ptr->debugfs_dev, irq_ptr,
253 if (IS_ERR(irq_ptr->debugfs_perf))
254 irq_ptr->debugfs_perf = NULL;
256 for_each_input_queue(irq_ptr, q, i)
257 setup_debugfs_entry(q, cdev);
258 for_each_output_queue(irq_ptr, q, i)
259 setup_debugfs_entry(q, cdev);
262 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
267 for_each_input_queue(irq_ptr, q, i)
268 debugfs_remove(q->debugfs_q);
269 for_each_output_queue(irq_ptr, q, i)
270 debugfs_remove(q->debugfs_q);
271 debugfs_remove(irq_ptr->debugfs_perf);
272 debugfs_remove(irq_ptr->debugfs_dev);
275 int __init qdio_debug_init(void)
277 debugfs_root = debugfs_create_dir("qdio", NULL);
279 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
280 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
281 debug_set_level(qdio_dbf_setup, DBF_INFO);
282 DBF_EVENT("dbf created\n");
284 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
285 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
286 debug_set_level(qdio_dbf_error, DBF_INFO);
287 DBF_ERROR("dbf created\n");
291 void qdio_debug_exit(void)
293 debugfs_remove(debugfs_root);
295 debug_unregister(qdio_dbf_setup);
297 debug_unregister(qdio_dbf_error);