2 * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 *---------------------------------------------------------------------------
27 * i4btrc - device driver for trace data read device
28 * ---------------------------------------------------
30 * last edit-date: [Sat Aug 11 18:07:15 2001]
32 * $FreeBSD: src/sys/i4b/driver/i4b_trace.c,v 1.9.2.3 2001/08/12 16:22:48 hm Exp $
33 * $DragonFly: src/sys/net/i4b/driver/i4b_trace.c,v 1.17 2006/12/22 23:44:55 swildner Exp $
35 *---------------------------------------------------------------------------*/
37 #include "use_i4btrc.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
45 #include <sys/kernel.h>
47 #include <sys/socket.h>
50 #include <sys/thread2.h>
52 #include <net/i4b/include/machine/i4b_trace.h>
53 #include <net/i4b/include/machine/i4b_ioctl.h>
55 #include "../include/i4b_mbuf.h"
56 #include "../include/i4b_global.h"
57 #include "../include/i4b_l3l4.h"
59 static struct ifqueue trace_queue[NI4BTRC];
60 static int device_state[NI4BTRC];
62 #define ST_ISOPEN 0x01
63 #define ST_WAITDATA 0x02
65 static int analyzemode = 0;
66 static int rxunit = -1;
67 static int txunit = -1;
68 static int outunit = -1;
70 #define PDEVSTATIC static
71 static d_open_t i4btrcopen;
72 static d_close_t i4btrcclose;
73 static d_read_t i4btrcread;
74 static d_ioctl_t i4btrcioctl;
78 static struct dev_ops i4btrc_ops = {
79 { "i4btrc", CDEV_MAJOR, 0 },
81 .d_close = i4btrcclose,
83 .d_ioctl = i4btrcioctl,
86 /*---------------------------------------------------------------------------*
87 * interface init routine
88 *---------------------------------------------------------------------------*/
89 static void i4btrcattach(void *);
90 PSEUDO_SET(i4btrcattach, i4b_trace);
92 int get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf);
94 /*---------------------------------------------------------------------------*
95 * interface attach routine
96 *---------------------------------------------------------------------------*/
98 i4btrcattach(void *dummy)
102 kprintf("i4btrc: %d ISDN trace device(s) attached\n", NI4BTRC);
104 for(i=0; i < NI4BTRC; i++)
107 make_dev(&i4btrc_ops, i,
108 UID_ROOT, GID_WHEEL, 0600, "i4btrc%d", i);
109 trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
111 device_state[i] = ST_IDLE;
115 /*---------------------------------------------------------------------------*
116 * get_trace_data_from_l1()
117 * ------------------------
118 * is called from layer 1, adds timestamp to trace data and puts
119 * it into a queue, from which it can be read from the i4btrc
120 * device. The unit number in the trace header selects the minor
121 * device's queue the data is put into.
122 *---------------------------------------------------------------------------*/
124 get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf)
129 int totlen = len + sizeof(i4b_trace_hdr_t);
132 * for telephony (or better non-HDLC HSCX mode) we get
133 * (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
134 * to put into the queue to userland. because of this
135 * we detect this situation, strip the length to MCLBYTES
136 * max size, and infor the userland program of this fact
137 * by putting the no of truncated bytes into hdr->trunc.
140 if(totlen > MCLBYTES)
143 hdr->trunc = totlen - MCLBYTES;
151 /* set length of trace record */
153 hdr->length = totlen;
155 /* check valid unit no */
157 if((unit = hdr->unit) > NI4BTRC)
159 kprintf("i4b_trace: get_trace_data_from_l1 - unit > NI4BTRC!\n");
165 if(!(m = i4b_Bgetmbuf(totlen)))
167 kprintf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
171 /* check if we are in analyzemode */
173 if(analyzemode && (unit == rxunit || unit == txunit))
182 if(IF_QFULL(&trace_queue[unit]))
187 IF_DEQUEUE(&trace_queue[unit], m1);
193 /* copy trace header */
194 memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr_t));
196 /* copy trace data */
198 memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, totlen-sizeof(i4b_trace_hdr_t));
200 memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, len);
204 IF_ENQUEUE(&trace_queue[unit], m);
206 if(device_state[unit] & ST_WAITDATA)
208 device_state[unit] &= ~ST_WAITDATA;
209 wakeup((caddr_t) &trace_queue[unit]);
217 /*---------------------------------------------------------------------------*
219 *---------------------------------------------------------------------------*/
221 i4btrcopen(struct dev_open_args *ap)
223 cdev_t dev = ap->a_head.a_dev;
224 int unit = minor(dev);
229 if(device_state[unit] & ST_ISOPEN)
232 if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
237 device_state[unit] = ST_ISOPEN;
244 /*---------------------------------------------------------------------------*
246 *---------------------------------------------------------------------------*/
248 i4btrcclose(struct dev_close_args *ap)
250 cdev_t dev = ap->a_head.a_dev;
251 int unit = minor(dev);
255 for(i=0; i < nctrl; i++)
257 if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
258 (ctrl_desc[i].unit == unit))
265 if(analyzemode && (unit == outunit))
272 (*ctrl_desc[cno].N_MGMT_COMMAND)(rxunit, CMR_SETTRACE, TRACE_OFF);
273 (*ctrl_desc[cno].N_MGMT_COMMAND)(txunit, CMR_SETTRACE, TRACE_OFF);
281 (*ctrl_desc[cno].N_MGMT_COMMAND)(ctrl_desc[cno].unit, CMR_SETTRACE, TRACE_OFF);
285 device_state[unit] = ST_IDLE;
291 /*---------------------------------------------------------------------------*
292 * read from trace device
293 *---------------------------------------------------------------------------*/
295 i4btrcread(struct dev_read_args *ap)
297 cdev_t dev = ap->a_head.a_dev;
298 struct uio *uio = ap->a_uio;
301 int unit = minor(dev);
303 if(!(device_state[unit] & ST_ISOPEN))
308 while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
310 device_state[unit] |= ST_WAITDATA;
312 if((error = tsleep((caddr_t) &trace_queue[unit],
313 PCATCH, "bitrc", 0 )) != 0)
315 device_state[unit] &= ~ST_WAITDATA;
321 IF_DEQUEUE(&trace_queue[unit], m);
324 error = uiomove(m->m_data, m->m_len, uio);
336 /*---------------------------------------------------------------------------*
337 * device driver ioctl routine
338 *---------------------------------------------------------------------------*/
340 i4btrcioctl(struct dev_ioctl_args *ap)
342 cdev_t dev = ap->a_head.a_dev;
344 int unit = minor(dev);
345 i4b_trace_setupa_t *tsa;
349 /* find the first passive controller matching our unit no */
351 for(i=0; i < nctrl; i++)
353 if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
354 (ctrl_desc[i].unit == unit))
366 (*ctrl_desc[cno].N_MGMT_COMMAND)(ctrl_desc[cno].unit, CMR_SETTRACE, (void *)*(unsigned int *)ap->a_data);
370 tsa = (i4b_trace_setupa_t *)ap->a_data;
372 if(tsa->rxunit >= 0 && tsa->rxunit < NI4BTRC)
373 rxunit = tsa->rxunit;
377 if(tsa->txunit >= 0 && tsa->txunit < NI4BTRC)
378 txunit = tsa->txunit;
395 (*ctrl_desc[cno].N_MGMT_COMMAND)(rxunit, CMR_SETTRACE, (int *)(tsa->rxflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
396 (*ctrl_desc[cno].N_MGMT_COMMAND)(txunit, CMR_SETTRACE, (int *)(tsa->txflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
414 #endif /* NI4BTRC > 0 */