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pcictl.c revision 1.12 
      1 /*	$NetBSD: pcictl.c,v 1.12 2009/04/18 07:17:16 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * pcictl(8) -- a program to manipulate the PCI bus
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/ioctl.h>
     44 #include <err.h>
     45 #include <errno.h>
     46 #include <fcntl.h>
     47 #include <paths.h>
     48 #include <pci.h>
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <unistd.h>
     53 #include <util.h>
     54 
     55 #include <dev/pci/pcireg.h>
     56 #include <dev/pci/pcidevs.h>
     57 #include <dev/pci/pciio.h>
     58 
     59 struct command {
     60 	const char *cmd_name;
     61 	const char *arg_names;
     62 	void (*cmd_func)(int, char *[]);
     63 	int open_flags;
     64 };
     65 
     66 int	main(int, char *[]);
     67 void	usage(void);
     68 
     69 int	pcifd;
     70 
     71 struct pciio_businfo pci_businfo;
     72 
     73 const	char *dvname;
     74 char	dvname_store[MAXPATHLEN];
     75 const	char *cmdname;
     76 const	char *argnames;
     77 int	print_numbers = 0;
     78 
     79 void	cmd_list(int, char *[]);
     80 void	cmd_dump(int, char *[]);
     81 
     82 const struct command commands[] = {
     83 	{ "list",
     84 	  "[-n] [-b bus] [-d device] [-f function]",
     85 	  cmd_list,
     86 	  O_RDONLY },
     87 
     88 	{ "dump",
     89 	  "[-b bus] -d device [-f function]",
     90 	  cmd_dump,
     91 	  O_RDONLY },
     92 
     93 	{ 0, 0, 0, 0 },
     94 };
     95 
     96 int	parse_bdf(const char *);
     97 
     98 void	scan_pci(int, int, int, void (*)(u_int, u_int, u_int));
     99 
    100 void	scan_pci_list(u_int, u_int, u_int);
    101 void	scan_pci_dump(u_int, u_int, u_int);
    102 
    103 int
    104 main(int argc, char *argv[])
    105 {
    106 	int i;
    107 
    108 	/* Must have at least: device command */
    109 	if (argc < 3)
    110 		usage();
    111 
    112 	/* Skip program name, get and skip device name, get command. */
    113 	dvname = argv[1];
    114 	cmdname = argv[2];
    115 	argv += 2;
    116 	argc -= 2;
    117 
    118 	/* Look up and call the command. */
    119 	for (i = 0; commands[i].cmd_name != NULL; i++)
    120 		if (strcmp(cmdname, commands[i].cmd_name) == 0)
    121 			break;
    122 	if (commands[i].cmd_name == NULL)
    123 		errx(1, "unknown command: %s", cmdname);
    124 
    125 	argnames = commands[i].arg_names;
    126 
    127 	/* Open the device. */
    128 	if ((strchr(dvname, '/') == NULL) &&
    129 	    (snprintf(dvname_store, sizeof(dvname_store), _PATH_DEV "%s",
    130 	     dvname) < (int)sizeof(dvname_store)))
    131 		dvname = dvname_store;
    132 	pcifd = open(dvname, commands[i].open_flags);
    133 	if (pcifd < 0)
    134 		err(1, "%s", dvname);
    135 
    136 	/* Make sure the device is a PCI bus. */
    137 	if (ioctl(pcifd, PCI_IOC_BUSINFO, &pci_businfo) != 0)
    138 		errx(1, "%s: not a PCI bus device", dvname);
    139 
    140 	(*commands[i].cmd_func)(argc, argv);
    141 	exit(0);
    142 }
    143 
    144 void
    145 usage()
    146 {
    147 	int i;
    148 
    149 	fprintf(stderr, "usage: %s device command [arg [...]]\n",
    150 	    getprogname());
    151 
    152 	fprintf(stderr, "   Available commands:\n");
    153 	for (i = 0; commands[i].cmd_name != NULL; i++)
    154 		fprintf(stderr, "\t%s %s\n", commands[i].cmd_name,
    155 		    commands[i].arg_names);
    156 
    157 	exit(1);
    158 }
    159 
    160 void
    161 cmd_list(int argc, char *argv[])
    162 {
    163 	int bus, dev, func;
    164 	int ch;
    165 
    166 	bus = pci_businfo.busno;
    167 	dev = func = -1;
    168 
    169 	while ((ch = getopt(argc, argv, "nb:d:f:")) != -1) {
    170 		switch (ch) {
    171 		case 'b':
    172 			bus = parse_bdf(optarg);
    173 			break;
    174 		case 'd':
    175 			dev = parse_bdf(optarg);
    176 			break;
    177 		case 'f':
    178 			func = parse_bdf(optarg);
    179 			break;
    180 		case 'n':
    181 			print_numbers = 1;
    182 			break;
    183 		default:
    184 			usage();
    185 		}
    186 	}
    187 	argv += optind;
    188 	argc -= optind;
    189 
    190 	if (argc != 0)
    191 		usage();
    192 
    193 	scan_pci(bus, dev, func, scan_pci_list);
    194 }
    195 
    196 void
    197 cmd_dump(int argc, char *argv[])
    198 {
    199 	int bus, dev, func;
    200 	int ch;
    201 
    202 	bus = pci_businfo.busno;
    203 	func = 0;
    204 	dev = -1;
    205 
    206 	while ((ch = getopt(argc, argv, "b:d:f:")) != -1) {
    207 		switch (ch) {
    208 		case 'b':
    209 			bus = parse_bdf(optarg);
    210 			break;
    211 		case 'd':
    212 			dev = parse_bdf(optarg);
    213 			break;
    214 		case 'f':
    215 			func = parse_bdf(optarg);
    216 			break;
    217 		default:
    218 			usage();
    219 		}
    220 	}
    221 	argv += optind;
    222 	argc -= optind;
    223 
    224 	if (argc != 0)
    225 		usage();
    226 
    227 	if (bus == -1)
    228 		errx(1, "dump: wildcard bus number not permitted");
    229 	if (dev == -1)
    230 		errx(1, "dump: must specify a device number");
    231 	if (func == -1)
    232 		errx(1, "dump: wildcard function number not permitted");
    233 
    234 	scan_pci(bus, dev, func, scan_pci_dump);
    235 }
    236 
    237 int
    238 parse_bdf(const char *str)
    239 {
    240 	long value;
    241 	char *end;
    242 
    243 	if (strcmp(str, "all") == 0 ||
    244 	    strcmp(str, "any") == 0)
    245 		return (-1);
    246 
    247 	value = strtol(str, &end, 0);
    248 	if(*end != '\0')
    249 		errx(1, "\"%s\" is not a number", str);
    250 
    251 	return value;
    252 }
    253 
    254 void
    255 scan_pci(int busarg, int devarg, int funcarg, void (*cb)(u_int, u_int, u_int))
    256 {
    257 	u_int busmin, busmax;
    258 	u_int devmin, devmax;
    259 	u_int funcmin, funcmax;
    260 	u_int bus, dev, func;
    261 	pcireg_t id, bhlcr;
    262 
    263 	if (busarg == -1) {
    264 		busmin = 0;
    265 		busmax = 255;
    266 	} else
    267 		busmin = busmax = busarg;
    268 
    269 	if (devarg == -1) {
    270 		devmin = 0;
    271 		if (pci_businfo.maxdevs <= 0)
    272 			devmax = 0;
    273 		else
    274 			devmax = pci_businfo.maxdevs - 1;
    275 	} else
    276 		devmin = devmax = devarg;
    277 
    278 	for (bus = busmin; bus <= busmax; bus++) {
    279 		for (dev = devmin; dev <= devmax; dev++) {
    280 			if (pcibus_conf_read(pcifd, bus, dev, 0,
    281 			    PCI_BHLC_REG, &bhlcr) != 0)
    282 				continue;
    283 			if (funcarg == -1) {
    284 				funcmin = 0;
    285 				if (PCI_HDRTYPE_MULTIFN(bhlcr))
    286 					funcmax = 7;
    287 				else
    288 					funcmax = 0;
    289 			} else
    290 				funcmin = funcmax = funcarg;
    291 			for (func = funcmin; func <= funcmax; func++) {
    292 				if (pcibus_conf_read(pcifd, bus, dev,
    293 				    func, PCI_ID_REG, &id) != 0)
    294 					continue;
    295 
    296 				/* Invalid vendor ID value? */
    297 				if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
    298 					continue;
    299 				/*
    300 				 * XXX Not invalid, but we've done this
    301 				 * ~forever.
    302 				 */
    303 				if (PCI_VENDOR(id) == 0)
    304 					continue;
    305 
    306 				(*cb)(bus, dev, func);
    307 			}
    308 		}
    309 	}
    310 }
    311 
    312 void
    313 scan_pci_list(u_int bus, u_int dev, u_int func)
    314 {
    315 	pcireg_t id, class;
    316 	char devinfo[256];
    317 
    318 	if (pcibus_conf_read(pcifd, bus, dev, func, PCI_ID_REG, &id) != 0)
    319 		return;
    320 	if (pcibus_conf_read(pcifd, bus, dev, func, PCI_CLASS_REG, &class) != 0)
    321 		return;
    322 
    323 	printf("%03u:%02u:%01u: ", bus, dev, func);
    324 	if (print_numbers) {
    325 		printf("0x%08x (0x%08x)\n", id, class);
    326 	} else {
    327 		pci_devinfo(id, class, 1, devinfo, sizeof(devinfo));
    328 		printf("%s\n", devinfo);
    329 	}
    330 }
    331 
    332 void
    333 scan_pci_dump(u_int bus, u_int dev, u_int func)
    334 {
    335 
    336 	pci_conf_print(pcifd, bus, dev, func);
    337 }
    338