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- #ident "$Id: ethersel.c,v 1.3 2005/01/05 07:30:47 hpa Exp $"
- /* ----------------------------------------------------------------------- *
- *
- * Copyright 2005 H. Peter Anvin - All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
- * Boston MA 02111-1307, USA; either version 2 of the License, or
- * (at your option) any later version; incorporated herein by reference.
- *
- * ----------------------------------------------------------------------- */
-
- /*
- * ethersel.c
- *
- * Search for an Ethernet card with a known PCI signature, and run
- * the corresponding Ethernet module.
- *
- * To use this, set up a syslinux config file like this:
- *
- * PROMPT 0
- * DEFAULT ethersel.c32
- * # DEV [DID xxxx:yyyy[/mask]] [RID zz-zz] [SID uuuu:vvvv[/mask]] commandline
- * # ...
- *
- * DID = PCI device ID
- * RID = Revision ID (range)
- * SID = Subsystem ID
- */
-
- #include <inttypes.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <console.h>
- #include <sys/pci.h>
- #include <com32.h>
-
- #ifdef DEBUG
- # define dprintf printf
- #else
- # define dprintf(...) ((void)0)
- #endif
-
- struct match {
- struct match *next;
- uint32_t did;
- uint32_t did_mask;
- uint32_t sid;
- uint32_t sid_mask;
- uint8_t rid_min, rid_max;
- char *filename;
- };
-
- static const char *
- get_config(void)
- {
- static com32sys_t r;
-
- r.eax.w[0] = 0x000E;
- __intcall(0x22, &r, &r);
-
- return MK_PTR(r.es, r.ebx.w[0]);
- }
-
- static char *
- skipspace(char *p)
- {
- while ( *p && *p <= ' ' )
- p++;
-
- return p;
- }
-
- #define MAX_LINE 512
-
- /* Check to see if we are at a certain keyword (case insensitive) */
- static int looking_at(const char *line, const char *kwd)
- {
- const char *p = line;
- const char *q = kwd;
-
- while ( *p && *q && ((*p^*q) & ~0x20) == 0 ) {
- p++;
- q++;
- }
-
- if ( *q )
- return 0; /* Didn't see the keyword */
-
- return *p <= ' '; /* Must be EOL or whitespace */
- }
-
- static char *
- get_did(char *p, uint32_t *idptr, uint32_t *maskptr)
- {
- unsigned long vid, did, m1, m2;
-
- *idptr = -1;
- *maskptr = 0xffffffff;
-
- vid = strtoul(p, &p, 16);
- if ( *p != ':' )
- return p; /* Bogus ID */
- did = strtoul(p+1, &p, 16);
-
- *idptr = (did << 16) + vid;
-
- if ( *p == '/' ) {
- m1 = strtoul(p+1, &p, 16);
- if ( *p != ':' ) {
- *maskptr = (m1 << 16) | 0xffff;
- } else {
- m2 = strtoul(p+1, &p, 16);
- *maskptr = (m1 << 16) | m2;
- }
- }
-
- return p;
- }
-
- static struct match *
- parse_config(const char *filename)
- {
- char line[MAX_LINE], *p;
- FILE *f;
- struct match *list = NULL;
- struct match **ep = &list;
- struct match *m;
-
- if ( !filename )
- filename = get_config();
-
- f = fopen(filename, "r");
- if ( !f )
- return list;
-
- while ( fgets(line, sizeof line, f) ) {
- p = skipspace(line);
-
- if ( !looking_at(p, "#") )
- continue;
- p = skipspace(p+1);
-
- if ( !looking_at(p, "dev") )
- continue;
- p = skipspace(p+3);
-
- m = malloc(sizeof(struct match));
- if ( !m )
- continue;
-
- memset(m, 0, sizeof *m);
- m->rid_max = 0xff;
-
- for(;;) {
- p = skipspace(p);
-
- if ( looking_at(p, "did") ) {
- p = get_did(p+3, &m->did, &m->did_mask);
- m->did_mask = 0xffffffff;
- } else if ( looking_at(p, "sid") ) {
- p = get_did(p+3, &m->sid, &m->sid_mask);
- } else if ( looking_at(p, "rid") ) {
- unsigned long r0, r1;
-
- p = skipspace(p+3);
-
- r0 = strtoul(p, &p, 16);
- if ( *p == '-' ) {
- r1 = strtoul(p+1, &p, 16);
- } else {
- r1 = r0;
- }
-
- m->rid_min = r0;
- m->rid_max = r1;
- } else {
- char *e;
-
- e = strchr(p, '\n');
- if ( *e ) *e = '\0';
- e = strchr(p, '\r');
- if ( *e ) *e = '\0';
-
- m->filename = strdup(p);
- if ( !m->filename )
- m->did = -1;
- break; /* Done with this line */
- }
- }
-
- dprintf("DEV DID %08x/%08x SID %08x/%08x RID %02x-%02x CMD %s\n",
- m->did, m->did_mask, m->sid, m->sid_mask,
- m->rid_min, m->rid_max, m->filename);
-
- *ep = m;
- ep = &m->next;
- }
-
- return list;
- }
-
- static struct match *
- pciscan(struct match *list)
- {
- unsigned int bus, dev, func, maxfunc;
- uint32_t did, sid;
- uint8_t hdrtype, rid;
- pciaddr_t a;
- struct match *m;
-
- for ( bus = 0 ; bus <= 0xff ; bus++ ) {
- for ( dev = 0 ; dev <= 0x1f ; dev++ ) {
- maxfunc = 0;
- for ( func = 0 ; func <= maxfunc ; func++ ) {
- a = pci_mkaddr(bus, dev, func, 0);
-
- did = pci_readl(a);
-
- if ( did == 0xffffffff || did == 0xffff0000 ||
- did == 0x0000ffff || did == 0x00000000 )
- continue;
-
- hdrtype = pci_readb(a + 0x0e);
-
- if ( hdrtype & 0x80 )
- maxfunc = 7; /* Multifunction device */
-
- if ( hdrtype & 0x7f )
- continue; /* Ignore bridge devices */
-
- rid = pci_readb(a + 0x08);
- sid = pci_readl(a + 0x2c);
-
- dprintf("Scanning: DID %08x SID %08x RID %02x\n", did, sid, rid);
-
- for ( m = list ; m ; m = m->next ) {
- if ( ((did ^ m->did) & m->did_mask) == 0 &&
- ((sid ^ m->sid) & m->sid_mask) == 0 &&
- rid >= m->rid_min && rid <= m->rid_max )
- return m;
- }
- }
- }
- }
-
- return NULL;
- }
-
- static void __attribute__((noreturn))
- execute(const char *cmdline)
- {
- static com32sys_t ireg;
-
- strcpy(__com32.cs_bounce, cmdline);
- ireg.eax.w[0] = 0x0003; /* Run command */
- ireg.ebx.w[0] = OFFS(__com32.cs_bounce);
- ireg.es = SEG(__com32.cs_bounce);
- __intcall(0x22, &ireg, NULL);
- exit(255); /* Shouldn't return */
- }
-
- int main(int argc, char *argv[])
- {
- struct match *list, *match;
-
- openconsole(&dev_null_r, &dev_stdcon_w);
-
- list = parse_config(argc < 2 ? NULL : argv[1]);
-
- match = pciscan(list);
-
- if ( match )
- execute(match->filename);
-
- /* On error, return to the command line */
- fputs("Error: no recognized network card found!\n", stderr);
- return 1;
- }
-
-