1/*-
2 * Copyright (C) 2009-2012 Semihalf
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <sys/malloc.h>
35#include <sys/proc.h>
36#include <sys/alq.h>
37#include <sys/time.h>
38
39#include <machine/stdarg.h>
40
41#include <dev/nand/nandsim_log.h>
42
43int  nandsim_log_level;
44int  nandsim_log_output;
45int  log_size = NANDSIM_RAM_LOG_SIZE;
46
47static int  nandsim_entry_size = NANDSIM_ENTRY_SIZE;
48static int  nandsim_entry_count = NANDSIM_ENTRY_COUNT;
49static int  str_index = 0;
50static char string[NANDSIM_ENTRY_SIZE + 1] = {0};
51
52int
53nandsim_log_init(struct nandsim_softc *sc, char *filename)
54{
55	int error = 0;
56
57	if (nandsim_log_output == NANDSIM_OUTPUT_FILE) {
58		error = alq_open(&sc->alq, filename,
59		    curthread->td_ucred, 0644,
60		    nandsim_entry_size, nandsim_entry_count);
61	} else if (nandsim_log_output == NANDSIM_OUTPUT_RAM) {
62		sc->log_buff = malloc(log_size, M_NANDSIM, M_WAITOK | M_ZERO);
63		if (!sc->log_buff)
64			error = ENOMEM;
65	}
66
67	return (error);
68}
69
70void
71nandsim_log_close(struct nandsim_softc *sc)
72{
73
74	if (nandsim_log_output == NANDSIM_OUTPUT_FILE) {
75		memset(&string[str_index], 0, NANDSIM_ENTRY_SIZE - str_index);
76		alq_write(sc->alq, (void *) string, ALQ_NOWAIT);
77		str_index = 0;
78		string[0] = '\0';
79		alq_close(sc->alq);
80	} else if (nandsim_log_output == NANDSIM_OUTPUT_RAM) {
81		free(sc->log_buff, M_NANDSIM);
82		sc->log_buff = NULL;
83	}
84}
85
86void
87nandsim_log(struct nandsim_chip *chip, int level, const char *fmt, ...)
88{
89	char hdr[TIME_STR_SIZE];
90	char tmp[NANDSIM_ENTRY_SIZE];
91	struct nandsim_softc *sc;
92	struct timeval currtime;
93	va_list ap;
94	int hdr_len, len, rest;
95
96	if (nandsim_log_output == NANDSIM_OUTPUT_NONE)
97		return;
98
99	if (chip == NULL)
100		return;
101
102	sc = chip->sc;
103	if (!sc->alq && nandsim_log_output == NANDSIM_OUTPUT_FILE)
104		return;
105
106	if (level <= nandsim_log_level) {
107		microtime(&currtime);
108		hdr_len = sprintf(hdr, "%08jd.%08li [chip:%d, ctrl:%d]: ",
109		    (intmax_t)currtime.tv_sec, currtime.tv_usec,
110		    chip->chip_num, chip->ctrl_num);
111
112		switch(nandsim_log_output) {
113		case NANDSIM_OUTPUT_CONSOLE:
114			printf("%s", hdr);
115			va_start(ap, fmt);
116			vprintf(fmt, ap);
117			va_end(ap);
118			break;
119		case NANDSIM_OUTPUT_RAM:
120			va_start(ap, fmt);
121			len = vsnprintf(tmp, NANDSIM_ENTRY_SIZE - 1, fmt, ap);
122			tmp[NANDSIM_ENTRY_SIZE - 1] = 0;
123			va_end(ap);
124
125			rest = log_size - sc->log_idx - 1;
126			if (rest >= hdr_len) {
127				bcopy(hdr, &sc->log_buff[sc->log_idx],
128				    hdr_len);
129				sc->log_idx += hdr_len;
130				sc->log_buff[sc->log_idx] = 0;
131			} else {
132				bcopy(hdr, &sc->log_buff[sc->log_idx], rest);
133				bcopy(&hdr[rest], sc->log_buff,
134				    hdr_len - rest);
135				sc->log_idx = hdr_len - rest;
136				sc->log_buff[sc->log_idx] = 0;
137			}
138
139			rest = log_size - sc->log_idx - 1;
140			if (rest >= len) {
141				bcopy(tmp, &sc->log_buff[sc->log_idx], len);
142				sc->log_idx += len;
143				sc->log_buff[sc->log_idx] = 0;
144			} else {
145				bcopy(tmp, &sc->log_buff[sc->log_idx], rest);
146				bcopy(&tmp[rest], sc->log_buff, len - rest);
147				sc->log_idx = len - rest;
148				sc->log_buff[sc->log_idx] = 0;
149			}
150
151			break;
152
153		case NANDSIM_OUTPUT_FILE:
154			va_start(ap, fmt);
155			len = vsnprintf(tmp, NANDSIM_ENTRY_SIZE - 1, fmt, ap);
156			tmp[NANDSIM_ENTRY_SIZE - 1] = 0;
157			va_end(ap);
158
159			rest = NANDSIM_ENTRY_SIZE - str_index;
160			if (rest >= hdr_len) {
161				strcat(string, hdr);
162				str_index += hdr_len;
163			} else {
164				strlcat(string, hdr, NANDSIM_ENTRY_SIZE + 1);
165				alq_write(sc->alq, (void *) string,
166				    ALQ_NOWAIT);
167				strcpy(string, &hdr[rest]);
168				str_index = hdr_len - rest;
169			}
170			rest = NANDSIM_ENTRY_SIZE - str_index;
171			if (rest >= len) {
172				strcat(string, tmp);
173				str_index += len;
174			} else {
175				strlcat(string, tmp, NANDSIM_ENTRY_SIZE + 1);
176				alq_write(sc->alq, (void *) string,
177				    ALQ_NOWAIT);
178				strcpy(string, &tmp[rest]);
179				str_index = len - rest;
180			}
181			break;
182		default:
183			break;
184		}
185	}
186}
187