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",
60 q->first_to_check, q->last_move);
62 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
63 q->u.in.polling, q->u.in.ack_start,
65 seq_printf(m, "IRQs disabled: %u\n",
66 test_bit(QDIO_QUEUE_IRQS_DISABLED,
67 &q->u.in.queue_irq_state));
69 seq_printf(m, "SBAL states:\n");
70 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
72 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
73 debug_get_buf_state(q, i, &state);
75 case SLSB_P_INPUT_NOT_INIT:
76 case SLSB_P_OUTPUT_NOT_INIT:
79 case SLSB_P_INPUT_PRIMED:
80 case SLSB_CU_OUTPUT_PRIMED:
83 case SLSB_P_INPUT_ACK:
86 case SLSB_P_INPUT_ERROR:
87 case SLSB_P_OUTPUT_ERROR:
90 case SLSB_CU_INPUT_EMPTY:
91 case SLSB_P_OUTPUT_EMPTY:
94 case SLSB_P_INPUT_HALTED:
95 case SLSB_P_OUTPUT_HALTED:
105 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
107 seq_printf(m, "\nSBAL statistics:");
108 if (!q->irq_ptr->perf_stat_enabled) {
109 seq_printf(m, " disabled\n");
113 seq_printf(m, "\n1 2.. 4.. 8.. "
114 "16.. 32.. 64.. 127\n");
115 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)
116 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);
117 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
118 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,
119 q->q_stats.nr_sbal_total);
123 static int qstat_seq_open(struct inode *inode, struct file *filp)
125 return single_open(filp, qstat_show,
126 filp->f_path.dentry->d_inode->i_private);
129 static const struct file_operations debugfs_fops = {
130 .owner = THIS_MODULE,
131 .open = qstat_seq_open,
134 .release = single_release,
137 static char *qperf_names[] = {
138 "Assumed adapter interrupts",
141 "Inbound tasklet runs",
142 "Inbound tasklet resched",
143 "Inbound tasklet resched2",
144 "Outbound tasklet runs",
150 "Inbound stop_polling",
151 "Inbound queue full",
154 "Outbound fast_requeue",
155 "Outbound target_full",
157 "QEBSM eqbs partial",
159 "QEBSM sqbs partial",
160 "Discarded interrupts"
163 static int qperf_show(struct seq_file *m, void *v)
165 struct qdio_irq *irq_ptr = m->private;
171 if (!irq_ptr->perf_stat_enabled) {
172 seq_printf(m, "disabled\n");
175 stat = (unsigned int *)&irq_ptr->perf_stat;
177 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)
178 seq_printf(m, "%26s:\t%u\n",
179 qperf_names[i], *(stat + i));
183 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
184 size_t count, loff_t *off)
186 struct seq_file *seq = file->private_data;
187 struct qdio_irq *irq_ptr = seq->private;
195 if (count >= sizeof(buf))
197 if (copy_from_user(&buf, ubuf, count))
201 ret = strict_strtoul(buf, 10, &val);
207 irq_ptr->perf_stat_enabled = 0;
208 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
209 for_each_input_queue(irq_ptr, q, i)
210 memset(&q->q_stats, 0, sizeof(q->q_stats));
211 for_each_output_queue(irq_ptr, q, i)
212 memset(&q->q_stats, 0, sizeof(q->q_stats));
215 irq_ptr->perf_stat_enabled = 1;
221 static int qperf_seq_open(struct inode *inode, struct file *filp)
223 return single_open(filp, qperf_show,
224 filp->f_path.dentry->d_inode->i_private);
227 static struct file_operations debugfs_perf_fops = {
228 .owner = THIS_MODULE,
229 .open = qperf_seq_open,
231 .write = qperf_seq_write,
233 .release = single_release,
235 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
237 char name[QDIO_DEBUGFS_NAME_LEN];
239 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",
240 q->is_input_q ? "input" : "output",
242 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
243 q->irq_ptr->debugfs_dev, q, &debugfs_fops);
244 if (IS_ERR(q->debugfs_q))
248 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
253 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev),
255 if (IS_ERR(irq_ptr->debugfs_dev))
256 irq_ptr->debugfs_dev = NULL;
258 irq_ptr->debugfs_perf = debugfs_create_file("statistics",
259 S_IFREG | S_IRUGO | S_IWUSR,
260 irq_ptr->debugfs_dev, irq_ptr,
262 if (IS_ERR(irq_ptr->debugfs_perf))
263 irq_ptr->debugfs_perf = NULL;
265 for_each_input_queue(irq_ptr, q, i)
266 setup_debugfs_entry(q, cdev);
267 for_each_output_queue(irq_ptr, q, i)
268 setup_debugfs_entry(q, cdev);
271 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
276 for_each_input_queue(irq_ptr, q, i)
277 debugfs_remove(q->debugfs_q);
278 for_each_output_queue(irq_ptr, q, i)
279 debugfs_remove(q->debugfs_q);
280 debugfs_remove(irq_ptr->debugfs_perf);
281 debugfs_remove(irq_ptr->debugfs_dev);
284 int __init qdio_debug_init(void)
286 debugfs_root = debugfs_create_dir("qdio", NULL);
288 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
289 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
290 debug_set_level(qdio_dbf_setup, DBF_INFO);
291 DBF_EVENT("dbf created\n");
293 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
294 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
295 debug_set_level(qdio_dbf_error, DBF_INFO);
296 DBF_ERROR("dbf created\n");
300 void qdio_debug_exit(void)
302 debugfs_remove(debugfs_root);
304 debug_unregister(qdio_dbf_setup);
306 debug_unregister(qdio_dbf_error);