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
16 debug_info_t *qdio_dbf_setup;
17 debug_info_t *qdio_dbf_error;
18
19 static struct dentry *debugfs_root;
20 #define MAX_DEBUGFS_QUEUES 32
21 static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
22 static DEFINE_MUTEX(debugfs_mutex);
23 #define QDIO_DEBUGFS_NAME_LEN 40
24
qdio_allocate_dbf(struct qdio_initialize * init_data,struct qdio_irq * irq_ptr)25 void qdio_allocate_dbf(struct qdio_initialize *init_data,
26 struct qdio_irq *irq_ptr)
27 {
28 char text[20];
29
30 DBF_EVENT("qfmt:%1d", init_data->q_format);
31 DBF_HEX(init_data->adapter_name, 8);
32 DBF_EVENT("qpff%4x", init_data->qib_param_field_format);
33 DBF_HEX(&init_data->qib_param_field, sizeof(void *));
34 DBF_HEX(&init_data->input_slib_elements, sizeof(void *));
35 DBF_HEX(&init_data->output_slib_elements, sizeof(void *));
36 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs,
37 init_data->no_output_qs);
38 DBF_HEX(&init_data->input_handler, sizeof(void *));
39 DBF_HEX(&init_data->output_handler, sizeof(void *));
40 DBF_HEX(&init_data->int_parm, sizeof(long));
41 DBF_HEX(&init_data->flags, sizeof(long));
42 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
43 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
44 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
45
46 /* allocate trace view for the interface */
47 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev));
48 irq_ptr->debug_area = debug_register(text, 2, 1, 16);
49 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view);
50 debug_set_level(irq_ptr->debug_area, DBF_WARN);
51 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created");
52 }
53
qstat_show(struct seq_file * m,void * v)54 static int qstat_show(struct seq_file *m, void *v)
55 {
56 unsigned char state;
57 struct qdio_q *q = m->private;
58 int i;
59
60 if (!q)
61 return 0;
62
63 seq_printf(m, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci);
64 seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
65 seq_printf(m, "ftc: %d\n", q->first_to_check);
66 seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
67 seq_printf(m, "polling: %d\n", q->u.in.polling);
68 seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
69 seq_printf(m, "slsb buffer states:\n");
70 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
71
72 qdio_siga_sync_q(q);
73 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
74 get_buf_state(q, i, &state, 0);
75 switch (state) {
76 case SLSB_P_INPUT_NOT_INIT:
77 case SLSB_P_OUTPUT_NOT_INIT:
78 seq_printf(m, "N");
79 break;
80 case SLSB_P_INPUT_PRIMED:
81 case SLSB_CU_OUTPUT_PRIMED:
82 seq_printf(m, "+");
83 break;
84 case SLSB_P_INPUT_ACK:
85 seq_printf(m, "A");
86 break;
87 case SLSB_P_INPUT_ERROR:
88 case SLSB_P_OUTPUT_ERROR:
89 seq_printf(m, "x");
90 break;
91 case SLSB_CU_INPUT_EMPTY:
92 case SLSB_P_OUTPUT_EMPTY:
93 seq_printf(m, "-");
94 break;
95 case SLSB_P_INPUT_HALTED:
96 case SLSB_P_OUTPUT_HALTED:
97 seq_printf(m, ".");
98 break;
99 default:
100 seq_printf(m, "?");
101 }
102 if (i == 63)
103 seq_printf(m, "\n");
104 }
105 seq_printf(m, "\n");
106 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
107 return 0;
108 }
109
qstat_seq_write(struct file * file,const char __user * buf,size_t count,loff_t * off)110 static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
111 size_t count, loff_t *off)
112 {
113 struct seq_file *seq = file->private_data;
114 struct qdio_q *q = seq->private;
115
116 if (!q)
117 return 0;
118
119 if (q->is_input_q)
120 xchg(q->irq_ptr->dsci, 1);
121 local_bh_disable();
122 tasklet_schedule(&q->tasklet);
123 local_bh_enable();
124 return count;
125 }
126
qstat_seq_open(struct inode * inode,struct file * filp)127 static int qstat_seq_open(struct inode *inode, struct file *filp)
128 {
129 return single_open(filp, qstat_show,
130 filp->f_path.dentry->d_inode->i_private);
131 }
132
remove_debugfs_entry(struct qdio_q * q)133 static void remove_debugfs_entry(struct qdio_q *q)
134 {
135 int i;
136
137 for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
138 if (!debugfs_queues[i])
139 continue;
140 if (debugfs_queues[i]->d_inode->i_private == q) {
141 debugfs_remove(debugfs_queues[i]);
142 debugfs_queues[i] = NULL;
143 }
144 }
145 }
146
147 static struct file_operations debugfs_fops = {
148 .owner = THIS_MODULE,
149 .open = qstat_seq_open,
150 .read = seq_read,
151 .write = qstat_seq_write,
152 .llseek = seq_lseek,
153 .release = single_release,
154 };
155
setup_debugfs_entry(struct qdio_q * q,struct ccw_device * cdev)156 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
157 {
158 int i = 0;
159 char name[QDIO_DEBUGFS_NAME_LEN];
160
161 while (debugfs_queues[i] != NULL) {
162 i++;
163 if (i >= MAX_DEBUGFS_QUEUES)
164 return;
165 }
166 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
167 dev_name(&cdev->dev),
168 q->is_input_q ? "input" : "output",
169 q->nr);
170 debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
171 debugfs_root, q, &debugfs_fops);
172 if (IS_ERR(debugfs_queues[i]))
173 debugfs_queues[i] = NULL;
174 }
175
qdio_setup_debug_entries(struct qdio_irq * irq_ptr,struct ccw_device * cdev)176 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
177 {
178 struct qdio_q *q;
179 int i;
180
181 mutex_lock(&debugfs_mutex);
182 for_each_input_queue(irq_ptr, q, i)
183 setup_debugfs_entry(q, cdev);
184 for_each_output_queue(irq_ptr, q, i)
185 setup_debugfs_entry(q, cdev);
186 mutex_unlock(&debugfs_mutex);
187 }
188
qdio_shutdown_debug_entries(struct qdio_irq * irq_ptr,struct ccw_device * cdev)189 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
190 {
191 struct qdio_q *q;
192 int i;
193
194 mutex_lock(&debugfs_mutex);
195 for_each_input_queue(irq_ptr, q, i)
196 remove_debugfs_entry(q);
197 for_each_output_queue(irq_ptr, q, i)
198 remove_debugfs_entry(q);
199 mutex_unlock(&debugfs_mutex);
200 }
201
qdio_debug_init(void)202 int __init qdio_debug_init(void)
203 {
204 debugfs_root = debugfs_create_dir("qdio_queues", NULL);
205
206 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);
207 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
208 debug_set_level(qdio_dbf_setup, DBF_INFO);
209 DBF_EVENT("dbf created\n");
210
211 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);
212 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);
213 debug_set_level(qdio_dbf_error, DBF_INFO);
214 DBF_ERROR("dbf created\n");
215 return 0;
216 }
217
qdio_debug_exit(void)218 void qdio_debug_exit(void)
219 {
220 debugfs_remove(debugfs_root);
221 if (qdio_dbf_setup)
222 debug_unregister(qdio_dbf_setup);
223 if (qdio_dbf_error)
224 debug_unregister(qdio_dbf_error);
225 }
226