1 /*
2 * Kernel CAPI 2.0 Module - /proc/capi handling
3 *
4 * Copyright 1999 by Carsten Paeth <calle@calle.de>
5 * Copyright 2002 by Kai Germaschewski <kai@germaschewski.name>
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12
13 #include "kcapi.h"
14 #include <linux/proc_fs.h>
15 #include <linux/seq_file.h>
16 #include <linux/init.h>
17 #include <linux/export.h>
18
state2str(unsigned short state)19 static char *state2str(unsigned short state)
20 {
21 switch (state) {
22 case CAPI_CTR_DETECTED: return "detected";
23 case CAPI_CTR_LOADING: return "loading";
24 case CAPI_CTR_RUNNING: return "running";
25 default: return "???";
26 }
27 }
28
29 // /proc/capi
30 // ===========================================================================
31
32 // /proc/capi/controller:
33 // cnr driver cardstate name driverinfo
34 // /proc/capi/contrstats:
35 // cnr nrecvctlpkt nrecvdatapkt nsentctlpkt nsentdatapkt
36 // ---------------------------------------------------------------------------
37
controller_start(struct seq_file * seq,loff_t * pos)38 static void *controller_start(struct seq_file *seq, loff_t *pos)
39 __acquires(capi_controller_lock)
40 {
41 mutex_lock(&capi_controller_lock);
42
43 if (*pos < CAPI_MAXCONTR)
44 return &capi_controller[*pos];
45
46 return NULL;
47 }
48
controller_next(struct seq_file * seq,void * v,loff_t * pos)49 static void *controller_next(struct seq_file *seq, void *v, loff_t *pos)
50 {
51 ++*pos;
52 if (*pos < CAPI_MAXCONTR)
53 return &capi_controller[*pos];
54
55 return NULL;
56 }
57
controller_stop(struct seq_file * seq,void * v)58 static void controller_stop(struct seq_file *seq, void *v)
59 __releases(capi_controller_lock)
60 {
61 mutex_unlock(&capi_controller_lock);
62 }
63
controller_show(struct seq_file * seq,void * v)64 static int controller_show(struct seq_file *seq, void *v)
65 {
66 struct capi_ctr *ctr = *(struct capi_ctr **) v;
67
68 if (!ctr)
69 return 0;
70
71 seq_printf(seq, "%d %-10s %-8s %-16s %s\n",
72 ctr->cnr, ctr->driver_name,
73 state2str(ctr->state),
74 ctr->name,
75 ctr->procinfo ? ctr->procinfo(ctr) : "");
76
77 return 0;
78 }
79
contrstats_show(struct seq_file * seq,void * v)80 static int contrstats_show(struct seq_file *seq, void *v)
81 {
82 struct capi_ctr *ctr = *(struct capi_ctr **) v;
83
84 if (!ctr)
85 return 0;
86
87 seq_printf(seq, "%d %lu %lu %lu %lu\n",
88 ctr->cnr,
89 ctr->nrecvctlpkt,
90 ctr->nrecvdatapkt,
91 ctr->nsentctlpkt,
92 ctr->nsentdatapkt);
93
94 return 0;
95 }
96
97 static const struct seq_operations seq_controller_ops = {
98 .start = controller_start,
99 .next = controller_next,
100 .stop = controller_stop,
101 .show = controller_show,
102 };
103
104 static const struct seq_operations seq_contrstats_ops = {
105 .start = controller_start,
106 .next = controller_next,
107 .stop = controller_stop,
108 .show = contrstats_show,
109 };
110
111 // /proc/capi/applications:
112 // applid l3cnt dblkcnt dblklen #ncci recvqueuelen
113 // /proc/capi/applstats:
114 // applid nrecvctlpkt nrecvdatapkt nsentctlpkt nsentdatapkt
115 // ---------------------------------------------------------------------------
116
applications_start(struct seq_file * seq,loff_t * pos)117 static void *applications_start(struct seq_file *seq, loff_t *pos)
118 __acquires(capi_controller_lock)
119 {
120 mutex_lock(&capi_controller_lock);
121
122 if (*pos < CAPI_MAXAPPL)
123 return &capi_applications[*pos];
124
125 return NULL;
126 }
127
128 static void *
applications_next(struct seq_file * seq,void * v,loff_t * pos)129 applications_next(struct seq_file *seq, void *v, loff_t *pos)
130 {
131 ++*pos;
132 if (*pos < CAPI_MAXAPPL)
133 return &capi_applications[*pos];
134
135 return NULL;
136 }
137
applications_stop(struct seq_file * seq,void * v)138 static void applications_stop(struct seq_file *seq, void *v)
139 __releases(capi_controller_lock)
140 {
141 mutex_unlock(&capi_controller_lock);
142 }
143
144 static int
applications_show(struct seq_file * seq,void * v)145 applications_show(struct seq_file *seq, void *v)
146 {
147 struct capi20_appl *ap = *(struct capi20_appl **) v;
148
149 if (!ap)
150 return 0;
151
152 seq_printf(seq, "%u %d %d %d\n",
153 ap->applid,
154 ap->rparam.level3cnt,
155 ap->rparam.datablkcnt,
156 ap->rparam.datablklen);
157
158 return 0;
159 }
160
161 static int
applstats_show(struct seq_file * seq,void * v)162 applstats_show(struct seq_file *seq, void *v)
163 {
164 struct capi20_appl *ap = *(struct capi20_appl **) v;
165
166 if (!ap)
167 return 0;
168
169 seq_printf(seq, "%u %lu %lu %lu %lu\n",
170 ap->applid,
171 ap->nrecvctlpkt,
172 ap->nrecvdatapkt,
173 ap->nsentctlpkt,
174 ap->nsentdatapkt);
175
176 return 0;
177 }
178
179 static const struct seq_operations seq_applications_ops = {
180 .start = applications_start,
181 .next = applications_next,
182 .stop = applications_stop,
183 .show = applications_show,
184 };
185
186 static const struct seq_operations seq_applstats_ops = {
187 .start = applications_start,
188 .next = applications_next,
189 .stop = applications_stop,
190 .show = applstats_show,
191 };
192
193 // ---------------------------------------------------------------------------
194
195 /* /proc/capi/drivers is always empty */
empty_read(struct file * file,char __user * buf,size_t size,loff_t * off)196 static ssize_t empty_read(struct file *file, char __user *buf,
197 size_t size, loff_t *off)
198 {
199 return 0;
200 }
201
202 static const struct proc_ops empty_proc_ops = {
203 .proc_read = empty_read,
204 .proc_lseek = default_llseek,
205 };
206
207 // ---------------------------------------------------------------------------
208
209 void __init
kcapi_proc_init(void)210 kcapi_proc_init(void)
211 {
212 proc_mkdir("capi", NULL);
213 proc_mkdir("capi/controllers", NULL);
214 proc_create_seq("capi/controller", 0, NULL, &seq_controller_ops);
215 proc_create_seq("capi/contrstats", 0, NULL, &seq_contrstats_ops);
216 proc_create_seq("capi/applications", 0, NULL, &seq_applications_ops);
217 proc_create_seq("capi/applstats", 0, NULL, &seq_applstats_ops);
218 proc_create("capi/driver", 0, NULL, &empty_proc_ops);
219 }
220
221 void
kcapi_proc_exit(void)222 kcapi_proc_exit(void)
223 {
224 remove_proc_entry("capi/driver", NULL);
225 remove_proc_entry("capi/controller", NULL);
226 remove_proc_entry("capi/contrstats", NULL);
227 remove_proc_entry("capi/applications", NULL);
228 remove_proc_entry("capi/applstats", NULL);
229 remove_proc_entry("capi/controllers", NULL);
230 remove_proc_entry("capi", NULL);
231 }
232