1/*-
2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
--- 15 unchanged lines hidden (view full) ---
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/pci/pci_pci.c 124365 2004-01-11 06:52:31Z imp $");
33
34/*
35 * PCI:PCI bridge support.
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
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87 sizeof(struct pcib_softc),
88};
89
90devclass_t pcib_devclass;
91
92DRIVER_MODULE(pcib, pci, pcib_driver, pcib_devclass, 0, 0);
93
94/*
95 * Generic device interface
96 */
97static int
98pcib_probe(device_t dev)
99{
100 if ((pci_get_class(dev) == PCIC_BRIDGE) &&
101 (pci_get_subclass(dev) == PCIS_BRIDGE_PCI)) {
102 device_set_desc(dev, "PCI-PCI bridge");
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156 sc->pmemlimit = PCI_PPBMEMLIMIT((pci_addr_t)pci_read_config(dev, PCIR_PMLIMITH_1, 4),
157 pci_read_config(dev, PCIR_PMLIMITL_1, 2));
158 }
159
160 /*
161 * Quirk handling.
162 */
163 switch (pci_get_devid(dev)) {
164 case 0x12258086: /* Intel 82454KX/GX (Orion) */
165 {
166 uint8_t supbus;
167
168 supbus = pci_read_config(dev, 0x41, 1);
169 if (supbus != 0xff) {
170 sc->secbus = supbus + 1;
171 sc->subbus = supbus + 1;
172 }
173 break;
174 }
175
176 /*
177 * The i82380FB mobile docking controller is a PCI-PCI bridge,
178 * and it is a subtractive bridge. However, the ProgIf is wrong
179 * so the normal setting of PCIB_SUBTRACTIVE bit doesn't
180 * happen. There's also a Toshiba bridge that behaves this
181 * way.
182 */
183 case 0x124b8086: /* Intel 82380FB Mobile */
184 case 0x060513d7: /* Toshiba ???? */
185 sc->flags |= PCIB_SUBTRACTIVE;
186 break;
187 }
188
189 /*
190 * Intel 815, 845 and other chipsets say they are PCI-PCI bridges,
191 * but have a ProgIF of 0x80. The 82801 family (AA, AB, BAM/CAM,
192 * BA/CA/DB and E) PCI bridges are HUB-PCI bridges, in Intelese.
193 * This means they act as if they were subtractively decoding
194 * bridges and pass all transactions. Mark them and real ProgIf 1
195 * parts as subtractive.
196 */
197 if ((pci_get_devid(dev) & 0xff00ffff) == 0x24008086 ||
198 pci_read_config(dev, PCIR_PROGIF, 1) == 1)
199 sc->flags |= PCIB_SUBTRACTIVE;
200
201 if (bootverbose) {
202 device_printf(dev, " secondary bus %d\n", sc->secbus);
203 device_printf(dev, " subordinate bus %d\n", sc->subbus);
204 device_printf(dev, " I/O decode 0x%x-0x%x\n", sc->iobase, sc->iolimit);
205 device_printf(dev, " memory decode 0x%x-0x%x\n", sc->membase, sc->memlimit);
206 device_printf(dev, " prefetched decode 0x%x-0x%x\n", sc->pmembase, sc->pmemlimit);
207 if (sc->flags & PCIB_SUBTRACTIVE)
208 device_printf(dev, " Subtractively decoded bridge.\n");
209 }
210
211 /*
212 * XXX If the secondary bus number is zero, we should assign a bus number
213 * since the BIOS hasn't, then initialise the bridge.
214 */
215
216 /*
--- 44 unchanged lines hidden (view full) ---
261 case PCIB_IVAR_BUS:
262 sc->secbus = value;
263 break;
264 }
265 return(ENOENT);
266}
267
268/*
269 * Is the prefetch window open (eg, can we allocate memory in it?)
270 */
271static int
272pcib_is_prefetch_open(struct pcib_softc *sc)
273{
274 return (sc->pmembase > 0 && sc->pmembase < sc->pmemlimit);
275}
276
277/*
278 * Is the nonprefetch window open (eg, can we allocate memory in it?)
279 */
280static int
281pcib_is_nonprefetch_open(struct pcib_softc *sc)
282{
283 return (sc->membase > 0 && sc->membase < sc->memlimit);
284}
285
286/*
287 * Is the io window open (eg, can we allocate ports in it?)
288 */
289static int
290pcib_is_io_open(struct pcib_softc *sc)
291{
292 return (sc->iobase > 0 && sc->iobase < sc->iolimit);
293}
294
295/*
296 * We have to trap resource allocation requests and ensure that the bridge
297 * is set up to, or capable of handling them.
298 */
299struct resource *
300pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
301 u_long start, u_long end, u_long count, u_int flags)
302{
303 struct pcib_softc *sc = device_get_softc(dev);
304 int ok;
305
306 /*
307 * Fail the allocation for this range if it's not supported.
308 */
309 switch (type) {
310 case SYS_RES_IOPORT:
311 ok = 0;
312 if (!pcib_is_io_open(sc))
313 break;
314 ok = (start >= sc->iobase && end <= sc->iolimit);
315 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
316 if (!ok) {
317 if (start < sc->iobase)
318 start = sc->iobase;
319 if (end > sc->iolimit)
320 end = sc->iolimit;
321 }
322 } else {
323 ok = 1;
324 if (start < sc->iobase && end > sc->iolimit) {
325 start = sc->iobase;
326 end = sc->iolimit;
327 }
328
329 }
330 if (end < start) {
331 device_printf(dev, "ioport: end (%lx) < start (%lx)\n", end, start);
332 start = 0;
333 end = 0;
334 ok = 0;
335 }
336 if (!ok) {
337 device_printf(dev, "device %s requested unsupported I/O "
338 "range 0x%lx-0x%lx (decoding 0x%x-0x%x)\n",
339 device_get_nameunit(child), start, end,
340 sc->iobase, sc->iolimit);
341 return (NULL);
342 }
343 if (bootverbose)
344 device_printf(dev, "device %s requested decoded I/O range 0x%lx-0x%lx\n",
345 device_get_nameunit(child), start, end);
346 break;
347
348 case SYS_RES_MEMORY:
349 ok = 0;
350 if (pcib_is_nonprefetch_open(sc))
351 ok = ok || (start >= sc->membase && end <= sc->memlimit);
352 if (pcib_is_prefetch_open(sc))
353 ok = ok || (start >= sc->pmembase && end <= sc->pmemlimit);
354 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
355 if (!ok) {
356 ok = 1;
357 if (flags & RF_PREFETCHABLE) {
358 if (pcib_is_prefetch_open(sc)) {
359 if (start < sc->pmembase)
360 start = sc->pmembase;
361 if (end > sc->pmemlimit)
362 end = sc->pmemlimit;
363 } else {
364 ok = 0;
365 }
366 } else { /* non-prefetchable */
367 if (pcib_is_nonprefetch_open(sc)) {
368 if (start < sc->membase)
369 start = sc->membase;
370 if (end > sc->memlimit)
371 end = sc->memlimit;
372 } else {
373 ok = 0;
374 }
375 }
376 }
377 } else if (!ok) {
378 ok = 1; /* subtractive bridge: always ok */
379 if (pcib_is_nonprefetch_open(sc)) {
380 if (start < sc->membase && end > sc->memlimit) {
381 start = sc->membase;
382 end = sc->memlimit;
383 }
384 }
385 if (pcib_is_prefetch_open(sc)) {
386 if (start < sc->pmembase && end > sc->pmemlimit) {
387 start = sc->pmembase;
388 end = sc->pmemlimit;
389 }
390 }
391 }
392 if (end < start) {
393 device_printf(dev, "memory: end (%lx) < start (%lx)\n", end, start);
394 start = 0;
395 end = 0;
396 ok = 0;
397 }
398 if (!ok && bootverbose)
399 device_printf(dev,
400 "device %s requested unsupported memory range "
401 "0x%lx-0x%lx (decoding 0x%x-0x%x, 0x%x-0x%x)\n",
402 device_get_nameunit(child), start, end,
403 sc->membase, sc->memlimit, sc->pmembase,
404 sc->pmemlimit);
405 if (!ok)
406 return (NULL);
407 if (bootverbose)
408 device_printf(dev,"device %s requested decoded memory range 0x%lx-0x%lx\n",
409 device_get_nameunit(child), start, end);
410 break;
411
412 default:
413 break;
414 }
415 /*
416 * Bridge is OK decoding this resource, so pass it up.
417 */
418 return (bus_generic_alloc_resource(dev, child, type, rid, start, end, count, flags));
419}
420
421/*
422 * PCIB interface.
423 */
424int
425pcib_maxslots(device_t dev)
426{
--- 134 unchanged lines hidden ---
2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
--- 15 unchanged lines hidden (view full) ---
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/pci/pci_pci.c 124365 2004-01-11 06:52:31Z imp $");
33
34/*
35 * PCI:PCI bridge support.
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
--- 46 unchanged lines hidden (view full) ---
87 sizeof(struct pcib_softc),
88};
89
90devclass_t pcib_devclass;
91
92DRIVER_MODULE(pcib, pci, pcib_driver, pcib_devclass, 0, 0);
93
94/*
95 * Generic device interface
96 */
97static int
98pcib_probe(device_t dev)
99{
100 if ((pci_get_class(dev) == PCIC_BRIDGE) &&
101 (pci_get_subclass(dev) == PCIS_BRIDGE_PCI)) {
102 device_set_desc(dev, "PCI-PCI bridge");
--- 53 unchanged lines hidden (view full) ---
156 sc->pmemlimit = PCI_PPBMEMLIMIT((pci_addr_t)pci_read_config(dev, PCIR_PMLIMITH_1, 4),
157 pci_read_config(dev, PCIR_PMLIMITL_1, 2));
158 }
159
160 /*
161 * Quirk handling.
162 */
163 switch (pci_get_devid(dev)) {
164 case 0x12258086: /* Intel 82454KX/GX (Orion) */
165 {
166 uint8_t supbus;
167
168 supbus = pci_read_config(dev, 0x41, 1);
169 if (supbus != 0xff) {
170 sc->secbus = supbus + 1;
171 sc->subbus = supbus + 1;
172 }
173 break;
174 }
175
176 /*
177 * The i82380FB mobile docking controller is a PCI-PCI bridge,
178 * and it is a subtractive bridge. However, the ProgIf is wrong
179 * so the normal setting of PCIB_SUBTRACTIVE bit doesn't
180 * happen. There's also a Toshiba bridge that behaves this
181 * way.
182 */
183 case 0x124b8086: /* Intel 82380FB Mobile */
184 case 0x060513d7: /* Toshiba ???? */
185 sc->flags |= PCIB_SUBTRACTIVE;
186 break;
187 }
188
189 /*
190 * Intel 815, 845 and other chipsets say they are PCI-PCI bridges,
191 * but have a ProgIF of 0x80. The 82801 family (AA, AB, BAM/CAM,
192 * BA/CA/DB and E) PCI bridges are HUB-PCI bridges, in Intelese.
193 * This means they act as if they were subtractively decoding
194 * bridges and pass all transactions. Mark them and real ProgIf 1
195 * parts as subtractive.
196 */
197 if ((pci_get_devid(dev) & 0xff00ffff) == 0x24008086 ||
198 pci_read_config(dev, PCIR_PROGIF, 1) == 1)
199 sc->flags |= PCIB_SUBTRACTIVE;
200
201 if (bootverbose) {
202 device_printf(dev, " secondary bus %d\n", sc->secbus);
203 device_printf(dev, " subordinate bus %d\n", sc->subbus);
204 device_printf(dev, " I/O decode 0x%x-0x%x\n", sc->iobase, sc->iolimit);
205 device_printf(dev, " memory decode 0x%x-0x%x\n", sc->membase, sc->memlimit);
206 device_printf(dev, " prefetched decode 0x%x-0x%x\n", sc->pmembase, sc->pmemlimit);
207 if (sc->flags & PCIB_SUBTRACTIVE)
208 device_printf(dev, " Subtractively decoded bridge.\n");
209 }
210
211 /*
212 * XXX If the secondary bus number is zero, we should assign a bus number
213 * since the BIOS hasn't, then initialise the bridge.
214 */
215
216 /*
--- 44 unchanged lines hidden (view full) ---
261 case PCIB_IVAR_BUS:
262 sc->secbus = value;
263 break;
264 }
265 return(ENOENT);
266}
267
268/*
269 * Is the prefetch window open (eg, can we allocate memory in it?)
270 */
271static int
272pcib_is_prefetch_open(struct pcib_softc *sc)
273{
274 return (sc->pmembase > 0 && sc->pmembase < sc->pmemlimit);
275}
276
277/*
278 * Is the nonprefetch window open (eg, can we allocate memory in it?)
279 */
280static int
281pcib_is_nonprefetch_open(struct pcib_softc *sc)
282{
283 return (sc->membase > 0 && sc->membase < sc->memlimit);
284}
285
286/*
287 * Is the io window open (eg, can we allocate ports in it?)
288 */
289static int
290pcib_is_io_open(struct pcib_softc *sc)
291{
292 return (sc->iobase > 0 && sc->iobase < sc->iolimit);
293}
294
295/*
296 * We have to trap resource allocation requests and ensure that the bridge
297 * is set up to, or capable of handling them.
298 */
299struct resource *
300pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
301 u_long start, u_long end, u_long count, u_int flags)
302{
303 struct pcib_softc *sc = device_get_softc(dev);
304 int ok;
305
306 /*
307 * Fail the allocation for this range if it's not supported.
308 */
309 switch (type) {
310 case SYS_RES_IOPORT:
311 ok = 0;
312 if (!pcib_is_io_open(sc))
313 break;
314 ok = (start >= sc->iobase && end <= sc->iolimit);
315 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
316 if (!ok) {
317 if (start < sc->iobase)
318 start = sc->iobase;
319 if (end > sc->iolimit)
320 end = sc->iolimit;
321 }
322 } else {
323 ok = 1;
324 if (start < sc->iobase && end > sc->iolimit) {
325 start = sc->iobase;
326 end = sc->iolimit;
327 }
328
329 }
330 if (end < start) {
331 device_printf(dev, "ioport: end (%lx) < start (%lx)\n", end, start);
332 start = 0;
333 end = 0;
334 ok = 0;
335 }
336 if (!ok) {
337 device_printf(dev, "device %s requested unsupported I/O "
338 "range 0x%lx-0x%lx (decoding 0x%x-0x%x)\n",
339 device_get_nameunit(child), start, end,
340 sc->iobase, sc->iolimit);
341 return (NULL);
342 }
343 if (bootverbose)
344 device_printf(dev, "device %s requested decoded I/O range 0x%lx-0x%lx\n",
345 device_get_nameunit(child), start, end);
346 break;
347
348 case SYS_RES_MEMORY:
349 ok = 0;
350 if (pcib_is_nonprefetch_open(sc))
351 ok = ok || (start >= sc->membase && end <= sc->memlimit);
352 if (pcib_is_prefetch_open(sc))
353 ok = ok || (start >= sc->pmembase && end <= sc->pmemlimit);
354 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
355 if (!ok) {
356 ok = 1;
357 if (flags & RF_PREFETCHABLE) {
358 if (pcib_is_prefetch_open(sc)) {
359 if (start < sc->pmembase)
360 start = sc->pmembase;
361 if (end > sc->pmemlimit)
362 end = sc->pmemlimit;
363 } else {
364 ok = 0;
365 }
366 } else { /* non-prefetchable */
367 if (pcib_is_nonprefetch_open(sc)) {
368 if (start < sc->membase)
369 start = sc->membase;
370 if (end > sc->memlimit)
371 end = sc->memlimit;
372 } else {
373 ok = 0;
374 }
375 }
376 }
377 } else if (!ok) {
378 ok = 1; /* subtractive bridge: always ok */
379 if (pcib_is_nonprefetch_open(sc)) {
380 if (start < sc->membase && end > sc->memlimit) {
381 start = sc->membase;
382 end = sc->memlimit;
383 }
384 }
385 if (pcib_is_prefetch_open(sc)) {
386 if (start < sc->pmembase && end > sc->pmemlimit) {
387 start = sc->pmembase;
388 end = sc->pmemlimit;
389 }
390 }
391 }
392 if (end < start) {
393 device_printf(dev, "memory: end (%lx) < start (%lx)\n", end, start);
394 start = 0;
395 end = 0;
396 ok = 0;
397 }
398 if (!ok && bootverbose)
399 device_printf(dev,
400 "device %s requested unsupported memory range "
401 "0x%lx-0x%lx (decoding 0x%x-0x%x, 0x%x-0x%x)\n",
402 device_get_nameunit(child), start, end,
403 sc->membase, sc->memlimit, sc->pmembase,
404 sc->pmemlimit);
405 if (!ok)
406 return (NULL);
407 if (bootverbose)
408 device_printf(dev,"device %s requested decoded memory range 0x%lx-0x%lx\n",
409 device_get_nameunit(child), start, end);
410 break;
411
412 default:
413 break;
414 }
415 /*
416 * Bridge is OK decoding this resource, so pass it up.
417 */
418 return (bus_generic_alloc_resource(dev, child, type, rid, start, end, count, flags));
419}
420
421/*
422 * PCIB interface.
423 */
424int
425pcib_maxslots(device_t dev)
426{
--- 134 unchanged lines hidden ---