[S390] qdio: remove incorrect memset
[linux-2.6.git] / drivers / s390 / cio / qdio_debug.c
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_trace;
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
25 void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
26 {
27         char dbf_text[20];
28
29         sprintf(dbf_text, "qfmt:%x", init_data->q_format);
30         QDIO_DBF_TEXT0(0, setup, dbf_text);
31         QDIO_DBF_HEX0(0, setup, init_data->adapter_name, 8);
32         sprintf(dbf_text, "qpff%4x", init_data->qib_param_field_format);
33         QDIO_DBF_TEXT0(0, setup, dbf_text);
34         QDIO_DBF_HEX0(0, setup, &init_data->qib_param_field, sizeof(void *));
35         QDIO_DBF_HEX0(0, setup, &init_data->input_slib_elements, sizeof(void *));
36         QDIO_DBF_HEX0(0, setup, &init_data->output_slib_elements, sizeof(void *));
37         sprintf(dbf_text, "niq:%4x", init_data->no_input_qs);
38         QDIO_DBF_TEXT0(0, setup, dbf_text);
39         sprintf(dbf_text, "noq:%4x", init_data->no_output_qs);
40         QDIO_DBF_TEXT0(0, setup, dbf_text);
41         QDIO_DBF_HEX0(0, setup, &init_data->input_handler, sizeof(void *));
42         QDIO_DBF_HEX0(0, setup, &init_data->output_handler, sizeof(void *));
43         QDIO_DBF_HEX0(0, setup, &init_data->int_parm, sizeof(long));
44         QDIO_DBF_HEX0(0, setup, &init_data->flags, sizeof(long));
45         QDIO_DBF_HEX0(0, setup, &init_data->input_sbal_addr_array, sizeof(void *));
46         QDIO_DBF_HEX0(0, setup, &init_data->output_sbal_addr_array, sizeof(void *));
47 }
48
49 static void qdio_unregister_dbf_views(void)
50 {
51         if (qdio_dbf_setup)
52                 debug_unregister(qdio_dbf_setup);
53         if (qdio_dbf_trace)
54                 debug_unregister(qdio_dbf_trace);
55 }
56
57 static int qdio_register_dbf_views(void)
58 {
59         qdio_dbf_setup = debug_register("qdio_setup", QDIO_DBF_SETUP_PAGES,
60                                         QDIO_DBF_SETUP_NR_AREAS,
61                                         QDIO_DBF_SETUP_LEN);
62         if (!qdio_dbf_setup)
63                 goto oom;
64         debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);
65         debug_set_level(qdio_dbf_setup, QDIO_DBF_SETUP_LEVEL);
66
67         qdio_dbf_trace = debug_register("qdio_trace", QDIO_DBF_TRACE_PAGES,
68                                         QDIO_DBF_TRACE_NR_AREAS,
69                                         QDIO_DBF_TRACE_LEN);
70         if (!qdio_dbf_trace)
71                 goto oom;
72         debug_register_view(qdio_dbf_trace, &debug_hex_ascii_view);
73         debug_set_level(qdio_dbf_trace, QDIO_DBF_TRACE_LEVEL);
74         return 0;
75 oom:
76         qdio_unregister_dbf_views();
77         return -ENOMEM;
78 }
79
80 static int qstat_show(struct seq_file *m, void *v)
81 {
82         unsigned char state;
83         struct qdio_q *q = m->private;
84         int i;
85
86         if (!q)
87                 return 0;
88
89         seq_printf(m, "device state indicator: %d\n", *q->irq_ptr->dsci);
90         seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
91         seq_printf(m, "ftc: %d\n", q->first_to_check);
92         seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
93         seq_printf(m, "polling: %d\n", q->u.in.polling);
94         seq_printf(m, "slsb buffer states:\n");
95
96         qdio_siga_sync_q(q);
97         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
98                 get_buf_state(q, i, &state);
99                 switch (state) {
100                 case SLSB_P_INPUT_NOT_INIT:
101                 case SLSB_P_OUTPUT_NOT_INIT:
102                         seq_printf(m, "N");
103                         break;
104                 case SLSB_P_INPUT_PRIMED:
105                 case SLSB_CU_OUTPUT_PRIMED:
106                         seq_printf(m, "+");
107                         break;
108                 case SLSB_P_INPUT_ACK:
109                         seq_printf(m, "A");
110                         break;
111                 case SLSB_P_INPUT_ERROR:
112                 case SLSB_P_OUTPUT_ERROR:
113                         seq_printf(m, "x");
114                         break;
115                 case SLSB_CU_INPUT_EMPTY:
116                 case SLSB_P_OUTPUT_EMPTY:
117                         seq_printf(m, "-");
118                         break;
119                 case SLSB_P_INPUT_HALTED:
120                 case SLSB_P_OUTPUT_HALTED:
121                         seq_printf(m, ".");
122                         break;
123                 default:
124                         seq_printf(m, "?");
125                 }
126                 if (i == 63)
127                         seq_printf(m, "\n");
128         }
129         seq_printf(m, "\n");
130         return 0;
131 }
132
133 static ssize_t qstat_seq_write(struct file *file, const char __user *buf,
134                                size_t count, loff_t *off)
135 {
136         struct seq_file *seq = file->private_data;
137         struct qdio_q *q = seq->private;
138
139         if (!q)
140                 return 0;
141
142         if (q->is_input_q)
143                 xchg(q->irq_ptr->dsci, 1);
144         local_bh_disable();
145         tasklet_schedule(&q->tasklet);
146         local_bh_enable();
147         return count;
148 }
149
150 static int qstat_seq_open(struct inode *inode, struct file *filp)
151 {
152         return single_open(filp, qstat_show,
153                            filp->f_path.dentry->d_inode->i_private);
154 }
155
156 static void remove_debugfs_entry(struct qdio_q *q)
157 {
158         int i;
159
160         for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) {
161                 if (!debugfs_queues[i])
162                         continue;
163                 if (debugfs_queues[i]->d_inode->i_private == q) {
164                         debugfs_remove(debugfs_queues[i]);
165                         debugfs_queues[i] = NULL;
166                 }
167         }
168 }
169
170 static struct file_operations debugfs_fops = {
171         .owner   = THIS_MODULE,
172         .open    = qstat_seq_open,
173         .read    = seq_read,
174         .write   = qstat_seq_write,
175         .llseek  = seq_lseek,
176         .release = single_release,
177 };
178
179 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
180 {
181         int i = 0;
182         char name[QDIO_DEBUGFS_NAME_LEN];
183
184         while (debugfs_queues[i] != NULL) {
185                 i++;
186                 if (i >= MAX_DEBUGFS_QUEUES)
187                         return;
188         }
189         snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
190                  dev_name(&cdev->dev),
191                  q->is_input_q ? "input" : "output",
192                  q->nr);
193         debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
194                                                 debugfs_root, q, &debugfs_fops);
195 }
196
197 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
198 {
199         struct qdio_q *q;
200         int i;
201
202         mutex_lock(&debugfs_mutex);
203         for_each_input_queue(irq_ptr, q, i)
204                 setup_debugfs_entry(q, cdev);
205         for_each_output_queue(irq_ptr, q, i)
206                 setup_debugfs_entry(q, cdev);
207         mutex_unlock(&debugfs_mutex);
208 }
209
210 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
211 {
212         struct qdio_q *q;
213         int i;
214
215         mutex_lock(&debugfs_mutex);
216         for_each_input_queue(irq_ptr, q, i)
217                 remove_debugfs_entry(q);
218         for_each_output_queue(irq_ptr, q, i)
219                 remove_debugfs_entry(q);
220         mutex_unlock(&debugfs_mutex);
221 }
222
223 int __init qdio_debug_init(void)
224 {
225         debugfs_root = debugfs_create_dir("qdio_queues", NULL);
226         return qdio_register_dbf_views();
227 }
228
229 void qdio_debug_exit(void)
230 {
231         debugfs_remove(debugfs_root);
232         qdio_unregister_dbf_views();
233 }