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path: root/drivers/s390/cio/qdio_debug.c
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Diffstat (limited to 'drivers/s390/cio/qdio_debug.c')
-rw-r--r--drivers/s390/cio/qdio_debug.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
new file mode 100644
index 000000000000..337aa3087a78
--- /dev/null
+++ b/drivers/s390/cio/qdio_debug.c
@@ -0,0 +1,240 @@
1/*
2 * drivers/s390/cio/qdio_debug.c
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
7 */
8#include <linux/proc_fs.h>
9#include <linux/seq_file.h>
10#include <linux/debugfs.h>
11#include <asm/qdio.h>
12#include <asm/debug.h>
13#include "qdio_debug.h"
14#include "qdio.h"
15
16debug_info_t *qdio_dbf_setup;
17debug_info_t *qdio_dbf_trace;
18
19static struct dentry *debugfs_root;
20#define MAX_DEBUGFS_QUEUES 32
21static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
22static DEFINE_MUTEX(debugfs_mutex);
23
24void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
25{
26 char dbf_text[20];
27
28 sprintf(dbf_text, "qfmt:%x", init_data->q_format);
29 QDIO_DBF_TEXT0(0, setup, dbf_text);
30 QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
31 sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
32 QDIO_DBF_TEXT0(0, setup, dbf_text);
33 QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
34 QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
35 QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
36 sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
37 QDIO_DBF_TEXT0(0, setup, dbf_text);
38 sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
39 QDIO_DBF_TEXT0(0, setup, dbf_text);
40 QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
41 QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
42 QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
43 QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
44 QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
45 QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
46}
47
48static void qdio_unregister_dbf_views(void)
49{
50 if (qdio_dbf_setup)
51 debug_unregister(qdio_dbf_setup);
52 if (qdio_dbf_trace)
53 debug_unregister(qdio_dbf_trace);
54}
55
56static int qdio_register_dbf_views(void)
57{
58 qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
59 QDIO_DBF_SETUP_NR_AREAS,
60 QDIO_DBF_SETUP_LEN);
61 if (!qdio_dbf_setup)
62 goto oom;
63 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
64 debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);
65
66 qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
67 QDIO_DBF_TRACE_NR_AREAS,
68 QDIO_DBF_TRACE_LEN);
69 if (!qdio_dbf_trace)
70 goto oom;
71 debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
72 debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
73 return 0;
74oom:
75 qdio_unregister_dbf_views();
76 return -ENOMEM;
77}
78
79static int qstat_show(struct seq_file *m, void *v)
80{
81 unsigned char state;
82 struct qdio_q *q = m->private;
83 int i;
84
85 if (!q)
86 return 0;
87
88 seq_printf(m, "device state indicator: %d\n", *q->irq_ptr->dsci);
89 seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
90 seq_printf(m, "ftc: %d\n", q->first_to_check);
91 seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
92 seq_printf(m, "polling: %d\n", q->u.in.polling);
93 seq_printf(m, "slsb buffer states:\n");
94
95 qdio_siga_sync_q(q);
96 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
97 get_buf_state(q, i, &state);
98 switch (state) {
99 case SLSB_P_INPUT_NOT_INIT:
100 case SLSB_P_OUTPUT_NOT_INIT:
101 seq_printf(m, "N");
102 break;
103 case SLSB_P_INPUT_PRIMED:
104 case SLSB_CU_OUTPUT_PRIMED:
105 seq_printf(m, "+");
106 break;
107 case SLSB_P_INPUT_ACK:
108 seq_printf(m, "A");
109 break;
110 case SLSB_P_INPUT_ERROR:
111 case SLSB_P_OUTPUT_ERROR:
112 seq_printf(m, "x");
113 break;
114 case SLSB_CU_INPUT_EMPTY:
115 case SLSB_P_OUTPUT_EMPTY:
116 seq_printf(m, "-");
117 break;
118 case SLSB_P_INPUT_HALTED:
119 case SLSB_P_OUTPUT_HALTED:
120 seq_printf(m, ".");
121 break;
122 default:
123 seq_printf(m, "?");
124 }
125 if (i == 63)
126 seq_printf(m, "\n");
127 }
128 seq_printf(m, "\n");
129 return 0;
130}
131
132static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
133 size_t count, loff_t *off)
134{
135 struct seq_file *seq = file->private_data;
136 struct qdio_q *q = seq->private;
137
138 if (!q)
139 return 0;
140
141 if (q->is_input_q)
142 xchg(q->irq_ptr->dsci, 1);
143 local_bh_disable();
144 tasklet_schedule(&q->tasklet);
145 local_bh_enable();
146 return count;
147}
148
149static int qstat_seq_open(struct inode *inode, struct file *filp)
150{
151 return single_open(filp, qstat_show,
152 filp->f_path.dentry->d_inode->i_private);
153}
154
155static void get_queue_name(struct qdio_q *q, struct ccw_device *cdev, char *name)
156{
157 memset(name, 0, sizeof(name));
158 sprintf(name, "%s", cdev->dev.bus_id);
159 if (q->is_input_q)
160 sprintf(name + strlen(name), "_input");
161 else
162 sprintf(name + strlen(name), "_output");
163 sprintf(name + strlen(name), "_%d", q->nr);
164}
165
166static void remove_debugfs_entry(struct qdio_q *q)
167{
168 int i;
169
170 for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
171 if (!debugfs_queues[i])
172 continue;
173 if (debugfs_queues[i]->d_inode->i_private == q) {
174 debugfs_remove(debugfs_queues[i]);
175 debugfs_queues[i] = NULL;
176 }
177 }
178}
179
180static struct file_operations debugfs_fops = {
181 .owner = THIS_MODULE,
182 .open = qstat_seq_open,
183 .read = seq_read,
184 .write = qstat_seq_write,
185 .llseek = seq_lseek,
186 .release = single_release,
187};
188
189static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
190{
191 int i = 0;
192 char name[40];
193
194 while (debugfs_queues[i] != NULL) {
195 i++;
196 if (i >= MAX_DEBUGFS_QUEUES)
197 return;
198 }
199 get_queue_name(q, cdev, name);
200 debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
201 debugfs_root, q, &debugfs_fops);
202}
203
204void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
205{
206 struct qdio_q *q;
207 int i;
208
209 mutex_lock(&debugfs_mutex);
210 for_each_input_queue(irq_ptr, q, i)
211 setup_debugfs_entry(q, cdev);
212 for_each_output_queue(irq_ptr, q, i)
213 setup_debugfs_entry(q, cdev);
214 mutex_unlock(&debugfs_mutex);
215}
216
217void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
218{
219 struct qdio_q *q;
220 int i;
221
222 mutex_lock(&debugfs_mutex);
223 for_each_input_queue(irq_ptr, q, i)
224 remove_debugfs_entry(q);
225 for_each_output_queue(irq_ptr, q, i)
226 remove_debugfs_entry(q);
227 mutex_unlock(&debugfs_mutex);
228}
229
230int __init qdio_debug_init(void)
231{
232 debugfs_root = debugfs_create_dir("qdio_queues", NULL);
233 return qdio_register_dbf_views();
234}
235
236void qdio_debug_exit(void)
237{
238 debugfs_remove(debugfs_root);
239 qdio_unregister_dbf_views();
240}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 18:48:40 -0500