1 /*-
2  * Copyright (c) 1990 The Regents of the University of California.
3  * Copyright (c) 2008 The DragonFly Project.
4  * All rights reserved.
5  *
6  * This code is derived from software contributed to Berkeley by
7  * William Jolitz.
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. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  *	from: @(#)autoconf.c	7.1 (Berkeley) 5/9/91
34  * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
35  */
36 
37 /*
38  * Setup the system to run on the current machine.
39  *
40  * Configure() is called at boot time and initializes the vba
41  * device tables and the memory controller monitoring.  Available
42  * devices are determined (from possibilities mentioned in ioconf.c),
43  * and the drivers are initialized.
44  */
45 #include "opt_bootp.h"
46 #include "opt_cd9660.h"
47 #include "opt_nfs.h"
48 #include "opt_nfsroot.h"
49 #include "opt_rootdevname.h"
50 #include "opt_swap.h"
51 
52 #include "use_isa.h"
53 
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/bootmaj.h>
57 #include <sys/bus.h>
58 #include <sys/buf.h>
59 #include <sys/conf.h>
60 #include <sys/diskslice.h>
61 #include <sys/reboot.h>
62 #include <sys/kernel.h>
63 #include <sys/malloc.h>
64 #include <sys/mount.h>
65 #include <sys/cons.h>
66 #include <sys/thread.h>
67 #include <sys/device.h>
68 #include <sys/machintr.h>
69 
70 #include <vm/vm_kern.h>
71 #include <vm/vm_extern.h>
72 #include <vm/vm_pager.h>
73 
74 #if 0
75 #include <machine/pcb.h>
76 #include <machine/pcb_ext.h>
77 #endif
78 #include <machine/smp.h>
79 #include <machine/globaldata.h>
80 #include <machine/md_var.h>
81 
82 #define MAXBUFSTRUCTSIZE	((size_t)512 * 1024 * 1024)
83 
84 #if NISA > 0
85 #include <bus/isa/isavar.h>
86 
87 device_t isa_bus_device = NULL;
88 #endif
89 
90 static void cpu_startup (void *);
91 static void configure_first (void *);
92 static void configure (void *);
93 static void configure_final (void *);
94 
95 #if defined(NFS) && defined(NFS_ROOT)
96 #if !defined(BOOTP_NFSROOT)
97 static void	pxe_setup_nfsdiskless(void);
98 #endif
99 #endif
100 
101 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
102 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
103 /* SI_ORDER_SECOND is hookable */
104 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
105 /* SI_ORDER_MIDDLE is hookable */
106 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
107 
108 cdev_t	rootdev = NULL;
109 cdev_t	dumpdev = NULL;
110 
111 /*
112  * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
113  * be able to max-out a GigE link if the server supports it.  Many servers
114  * do not so the default is 8192.
115  *
116  * nfsroot.rahead defaults to something reasonable, can be overridden.
117  */
118 static int nfsroot_iosize = 8192;
119 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize);
120 static int nfsroot_rahead = 4;
121 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead);
122 
123 /*
124  *
125  */
126 static void
127 cpu_startup(void *dummy)
128 {
129 	vm_offset_t buffer_sva;
130 	vm_offset_t buffer_eva;
131 	vm_offset_t pager_sva;
132 	vm_offset_t pager_eva;
133 
134 	kprintf("%s", version);
135 	kprintf("real memory = %ju (%juK bytes)\n",
136 	    (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024));
137 
138        if (nbuf == 0) {
139                 long factor = NBUFCALCSIZE / 1024;              /* KB/nbuf */
140                 long kbytes = physmem * (PAGE_SIZE / 1024);     /* physmem */
141 
142                 nbuf = 50;
143 
144                 if (kbytes > 128 * 1024)
145                         nbuf += (kbytes - 128 * 1024) / (factor * 20);
146                 if (maxbcache && nbuf > maxbcache / NBUFCALCSIZE)
147                         nbuf = maxbcache / NBUFCALCSIZE;
148 
149 		if ((size_t)nbuf * sizeof(struct buf) > MAXBUFSTRUCTSIZE) {
150 			kprintf("Warning: nbuf capped at %ld due to the "
151 				"reasonability limit\n", nbuf);
152 			nbuf = MAXBUFSTRUCTSIZE / sizeof(struct buf);
153 		}
154         }
155 
156 	if (nbuf > (virtual_end - virtual_start) / (MAXBSIZE * 4)) {
157 		nbuf = (virtual_end - virtual_start) / (MAXBSIZE * 4);
158 		kprintf("Warning: nbufs capped at %ld for "
159 			"valloc considerations\n", nbuf);
160 	}
161 
162 	nswbuf_mem = lmax(lmin(nbuf / 32, 32), 4);
163 #ifdef NSWBUF_MIN
164 	if (nswbuf_mem < NSWBUF_MIN)
165 		nswbuf_mem = NSWBUF_MIN;
166 #endif
167 	nswbuf_kva = lmax(lmin(nbuf / 4, 256), 16);
168 #ifdef NSWBUF_MIN
169 	if (nswbuf_kva < NSWBUF_MIN)
170 		nswbuf_kva = NSWBUF_MIN;
171 #endif
172 
173 	/*
174 	 * Allocate memory for the buffer cache
175 	 */
176 	buf = (void *)kmem_alloc(kernel_map,
177 				 nbuf * sizeof(struct buf),
178 				 VM_SUBSYS_BUF);
179 	swbuf_mem = (void *)kmem_alloc(kernel_map,
180 				       nswbuf_mem * sizeof(struct buf),
181 				       VM_SUBSYS_BUF);
182 	swbuf_kva = (void *)kmem_alloc(kernel_map,
183 				       nswbuf_kva * sizeof(struct buf),
184 				       VM_SUBSYS_BUF);
185 
186 	kmem_suballoc(kernel_map, clean_map, &clean_sva, &clean_eva,
187 		      (nbuf * MAXBSIZE * 2) +
188 		      (nswbuf_mem + nswbuf_kva) * MAXPHYS +
189 		      pager_map_size);
190 	kmem_suballoc(clean_map, buffer_map, &buffer_sva, &buffer_eva,
191 		      (nbuf * MAXBSIZE * 2));
192 	buffer_map->system_map = 1;
193 	kmem_suballoc(clean_map, pager_map, &pager_sva, &pager_eva,
194 		      (nswbuf_mem + nswbuf_kva) * MAXPHYS +
195 		      pager_map_size);
196 	pager_map->system_map = 1;
197 	kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count),
198 		ptoa(vmstats.v_free_count) / 1024);
199 	mp_start();
200 	mp_announce();
201 	cpu_setregs();
202 }
203 
204 /*
205  * Determine i/o configuration for a machine.
206  */
207 static void
208 configure_first(void *dummy)
209 {
210 }
211 
212 static void
213 configure(void *dummy)
214 {
215         /*
216 	 * Final interrupt support acviation, then enable hardware interrupts.
217 	 */
218 	MachIntrABI.finalize();
219 	cpu_enable_intr();
220 
221 	/*
222 	 * This will configure all devices, generally starting with the
223 	 * nexus (pc64/x86_64/nexus.c).  The nexus ISA code explicitly
224 	 * dummies up the attach in order to delay legacy initialization
225 	 * until after all other busses/subsystems have had a chance
226 	 * at those resources.
227 	 */
228 	root_bus_configure();
229 
230 #if NISA > 0
231 	/*
232 	 * Explicitly probe and attach ISA last.  The isa bus saves
233 	 * it's device node at attach time for us here.
234 	 */
235 	if (isa_bus_device)
236 		isa_probe_children(isa_bus_device);
237 #endif
238 
239 	/*
240 	 * Allow lowering of the ipl to the lowest kernel level if we
241 	 * panic (or call tsleep() before clearing `cold').  No level is
242 	 * completely safe (since a panic may occur in a critical region
243 	 * at splhigh()), but we want at least bio interrupts to work.
244 	 */
245 	safepri = TDPRI_KERN_USER;
246 }
247 
248 /*
249  * Finalize configure.  Reprobe for the console, in case it was one
250  * of the devices which attached, then finish console initialization.
251  */
252 static void
253 configure_final(void *dummy)
254 {
255 	cninit();
256 	cninit_finish();
257 
258 	if (bootverbose)
259 		kprintf("Device configuration finished.\n");
260 }
261 
262 #ifdef BOOTP
263 void bootpc_init(void);
264 #endif
265 /*
266  * Do legacy root filesystem discovery.
267  */
268 void
269 cpu_rootconf(void)
270 {
271 #ifdef BOOTP
272         bootpc_init();
273 #endif
274 #if defined(NFS) && defined(NFS_ROOT)
275 #if !defined(BOOTP_NFSROOT)
276 	pxe_setup_nfsdiskless();
277 	if (nfs_diskless_valid)
278 #endif
279 		rootdevnames[0] = "nfs:";
280 #endif
281 }
282 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL);
283 
284 #if defined(NFS) && defined(NFS_ROOT)
285 #if !defined(BOOTP_NFSROOT)
286 
287 #include <sys/socket.h>
288 #include <net/if.h>
289 #include <net/if_dl.h>
290 #include <net/if_types.h>
291 #include <net/if_var.h>
292 #include <net/ethernet.h>
293 #include <netinet/in.h>
294 #include <vfs/nfs/rpcv2.h>
295 #include <vfs/nfs/nfsproto.h>
296 #include <vfs/nfs/nfs.h>
297 #include <vfs/nfs/nfsdiskless.h>
298 
299 extern struct nfs_diskless	nfs_diskless;
300 
301 /*
302  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
303  * exist the sockaddr will remain zerod out (callers typically just check
304  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
305  */
306 static int
307 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
308 {
309 	u_int32_t	a[4];
310 	char		*cp;
311 
312 	bzero(sa, sizeof(*sa));
313 
314 	if ((cp = kgetenv(ev)) == NULL)
315 		return(1);
316 	if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
317 		return(1);
318 	if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
319 		return(1);
320 	/* XXX is this ordering correct? */
321 	sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
322 	sa->sin_len = sizeof(*sa);
323 	sa->sin_family = AF_INET;
324 	return(0);
325 }
326 
327 static int
328 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
329 {
330 	char		*cp;
331 	u_int32_t	a[6];
332 
333 	bzero(sa, sizeof(*sa));
334 	sa->sdl_len = sizeof(*sa);
335 	sa->sdl_family = AF_LINK;
336 	sa->sdl_type = IFT_ETHER;
337 	sa->sdl_alen = ETHER_ADDR_LEN;
338 	if ((cp = kgetenv(ev)) == NULL)
339 		return(1);
340 	if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
341 		return(1);
342 	sa->sdl_data[0] = a[0];
343 	sa->sdl_data[1] = a[1];
344 	sa->sdl_data[2] = a[2];
345 	sa->sdl_data[3] = a[3];
346 	sa->sdl_data[4] = a[4];
347 	sa->sdl_data[5] = a[5];
348 	return(0);
349 }
350 
351 static int
352 decode_nfshandle(char *ev, u_char *fh)
353 {
354 	u_char	*cp;
355 	int	len, val;
356 
357 	if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
358 		return(0);
359 	len = 0;
360 	cp++;
361 	for (;;) {
362 		if (*cp == 'X')
363 			return(len);
364 		if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
365 			return(0);
366 		*(fh++) = val;
367 		len++;
368 		cp += 2;
369 		if (len > NFSX_V2FH)
370 		    return(0);
371 	}
372 }
373 
374 /*
375  * Populate the essential fields in the nfsv3_diskless structure.
376  *
377  * The loader is expected to export the following environment variables:
378  *
379  * boot.netif.ip		IP address on boot interface
380  * boot.netif.netmask		netmask on boot interface
381  * boot.netif.gateway		default gateway (optional)
382  * boot.netif.hwaddr		hardware address of boot interface
383  * boot.netif.name		name of boot interface (instead of hw addr)
384  * boot.nfsroot.server		IP address of root filesystem server
385  * boot.nfsroot.path		path of the root filesystem on server
386  * boot.nfsroot.nfshandle	NFS handle for root filesystem on server
387  */
388 static void
389 pxe_setup_nfsdiskless(void)
390 {
391 	struct nfs_diskless	*nd = &nfs_diskless;
392 	struct ifnet		*ifp;
393 	struct ifaddr		*ifa;
394 	struct sockaddr_dl	*sdl, ourdl;
395 	struct sockaddr_in	myaddr, netmask;
396 	char			*cp;
397 
398 	/* set up interface */
399 	if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
400 		return;
401 	if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
402 		kprintf("PXE: no netmask\n");
403 		return;
404 	}
405 	bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
406 	bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
407 	((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
408 		myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
409 	bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
410 
411 	if ((cp = kgetenv("boot.netif.name")) != NULL) {
412 		ifnet_lock();
413 		ifp = ifunit(cp);
414 		if (ifp) {
415 			strlcpy(nd->myif.ifra_name, ifp->if_xname,
416 			    sizeof(nd->myif.ifra_name));
417 			ifnet_unlock();
418 			goto match_done;
419 		}
420 		ifnet_unlock();
421 		kprintf("PXE: cannot find interface %s\n", cp);
422 		return;
423 	}
424 
425 	if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
426 		kprintf("PXE: no hardware address\n");
427 		return;
428 	}
429 	ifa = NULL;
430 	ifnet_lock();
431 	TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
432 		struct ifaddr_container *ifac;
433 
434 		TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
435 			ifa = ifac->ifa;
436 
437 			if ((ifa->ifa_addr->sa_family == AF_LINK) &&
438 			    (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
439 				if ((sdl->sdl_type == ourdl.sdl_type) &&
440 				    (sdl->sdl_alen == ourdl.sdl_alen) &&
441 				    !bcmp(sdl->sdl_data + sdl->sdl_nlen,
442 					  ourdl.sdl_data + ourdl.sdl_nlen,
443 					  sdl->sdl_alen)) {
444 					strlcpy(nd->myif.ifra_name,
445 					    ifp->if_xname,
446 					    sizeof(nd->myif.ifra_name));
447 					ifnet_unlock();
448 					goto match_done;
449 				}
450 			}
451 		}
452 	}
453 	ifnet_unlock();
454 	kprintf("PXE: no interface\n");
455 	return;	/* no matching interface */
456 match_done:
457 	/* set up gateway */
458 	inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
459 
460 	/* XXX set up swap? */
461 
462 	/* set up root mount */
463 	nd->root_args.rsize = nfsroot_iosize;
464 	nd->root_args.wsize = nfsroot_iosize;
465 	nd->root_args.sotype = SOCK_STREAM;
466 	nd->root_args.readahead = nfsroot_rahead;
467 	nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT |
468 			      NFSMNT_READAHEAD;
469 	if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
470 		kprintf("PXE: no server\n");
471 		return;
472 	}
473 	nd->root_saddr.sin_port = htons(NFS_PORT);
474 
475 	/*
476 	 * A tftp-only loader may pass NFS path information without a
477 	 * root handle.  Generate a warning but continue configuring.
478 	 */
479 	if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
480 		kprintf("PXE: Warning, no NFS handle passed from loader\n");
481 	}
482 	if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
483 		strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
484 
485 	nfs_diskless_valid = 1;
486 }
487 
488 #endif
489 #endif
490