2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 * PCI:PCI bridge support.
38 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
44 #include <sys/sysctl.h>
45 #include <sys/systm.h>
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcireg.h>
49 #include <dev/pci/pci_private.h>
50 #include <dev/pci/pcib_private.h>
54 static int pcib_probe(device_t dev);
55 static int pcib_suspend(device_t dev);
56 static int pcib_resume(device_t dev);
57 static int pcib_power_for_sleep(device_t pcib, device_t dev,
60 static device_method_t pcib_methods[] = {
61 /* Device interface */
62 DEVMETHOD(device_probe, pcib_probe),
63 DEVMETHOD(device_attach, pcib_attach),
64 DEVMETHOD(device_detach, bus_generic_detach),
65 DEVMETHOD(device_shutdown, bus_generic_shutdown),
66 DEVMETHOD(device_suspend, pcib_suspend),
67 DEVMETHOD(device_resume, pcib_resume),
70 DEVMETHOD(bus_print_child, bus_generic_print_child),
71 DEVMETHOD(bus_read_ivar, pcib_read_ivar),
72 DEVMETHOD(bus_write_ivar, pcib_write_ivar),
73 DEVMETHOD(bus_alloc_resource, pcib_alloc_resource),
75 DEVMETHOD(bus_adjust_resource, pcib_adjust_resource),
76 DEVMETHOD(bus_release_resource, pcib_release_resource),
78 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
79 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
81 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
82 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
83 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
84 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
87 DEVMETHOD(pcib_maxslots, pcib_maxslots),
88 DEVMETHOD(pcib_read_config, pcib_read_config),
89 DEVMETHOD(pcib_write_config, pcib_write_config),
90 DEVMETHOD(pcib_route_interrupt, pcib_route_interrupt),
91 DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi),
92 DEVMETHOD(pcib_release_msi, pcib_release_msi),
93 DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix),
94 DEVMETHOD(pcib_release_msix, pcib_release_msix),
95 DEVMETHOD(pcib_map_msi, pcib_map_msi),
96 DEVMETHOD(pcib_power_for_sleep, pcib_power_for_sleep),
101 static devclass_t pcib_devclass;
103 DEFINE_CLASS_0(pcib, pcib_driver, pcib_methods, sizeof(struct pcib_softc));
104 DRIVER_MODULE(pcib, pci, pcib_driver, pcib_devclass, 0, 0);
109 * - properly handle the ISA enable bit. If it is set, we should change
110 * the behavior of the I/O window resource and rman to not allocate the
111 * blocked ranges (upper 768 bytes of each 1K in the first 64k of the
112 * I/O port address space).
116 * Is a resource from a child device sub-allocated from one of our
120 pcib_is_resource_managed(struct pcib_softc *sc, int type, struct resource *r)
125 return (rman_is_region_manager(r, &sc->io.rman));
127 /* Prefetchable resources may live in either memory rman. */
128 if (rman_get_flags(r) & RF_PREFETCHABLE &&
129 rman_is_region_manager(r, &sc->pmem.rman))
131 return (rman_is_region_manager(r, &sc->mem.rman));
137 pcib_is_window_open(struct pcib_window *pw)
140 return (pw->valid && pw->base < pw->limit);
144 * XXX: If RF_ACTIVE did not also imply allocating a bus space tag and
145 * handle for the resource, we could pass RF_ACTIVE up to the PCI bus
146 * when allocating the resource windows and rely on the PCI bus driver
150 pcib_activate_window(struct pcib_softc *sc, int type)
153 PCI_ENABLE_IO(device_get_parent(sc->dev), sc->dev, type);
157 pcib_write_windows(struct pcib_softc *sc, int mask)
163 if (sc->io.valid && mask & WIN_IO) {
164 val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
165 if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
166 pci_write_config(dev, PCIR_IOBASEH_1,
167 sc->io.base >> 16, 2);
168 pci_write_config(dev, PCIR_IOLIMITH_1,
169 sc->io.limit >> 16, 2);
171 pci_write_config(dev, PCIR_IOBASEL_1, sc->io.base >> 8, 1);
172 pci_write_config(dev, PCIR_IOLIMITL_1, sc->io.limit >> 8, 1);
175 if (mask & WIN_MEM) {
176 pci_write_config(dev, PCIR_MEMBASE_1, sc->mem.base >> 16, 2);
177 pci_write_config(dev, PCIR_MEMLIMIT_1, sc->mem.limit >> 16, 2);
180 if (sc->pmem.valid && mask & WIN_PMEM) {
181 val = pci_read_config(dev, PCIR_PMBASEL_1, 2);
182 if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) {
183 pci_write_config(dev, PCIR_PMBASEH_1,
184 sc->pmem.base >> 32, 4);
185 pci_write_config(dev, PCIR_PMLIMITH_1,
186 sc->pmem.limit >> 32, 4);
188 pci_write_config(dev, PCIR_PMBASEL_1, sc->pmem.base >> 16, 2);
189 pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmem.limit >> 16, 2);
194 pcib_alloc_window(struct pcib_softc *sc, struct pcib_window *w, int type,
195 int flags, pci_addr_t max_address)
200 if (max_address != (u_long)max_address)
202 w->rman.rm_start = 0;
203 w->rman.rm_end = max_address;
204 w->rman.rm_type = RMAN_ARRAY;
205 snprintf(buf, sizeof(buf), "%s %s window",
206 device_get_nameunit(sc->dev), w->name);
207 w->rman.rm_descr = strdup(buf, M_DEVBUF);
208 error = rman_init(&w->rman);
210 panic("Failed to initialize %s %s rman",
211 device_get_nameunit(sc->dev), w->name);
213 if (!pcib_is_window_open(w))
216 if (w->base > max_address || w->limit > max_address) {
217 device_printf(sc->dev,
218 "initial %s window has too many bits, ignoring\n", w->name);
222 w->res = bus_alloc_resource(sc->dev, type, &rid, w->base, w->limit,
223 w->limit - w->base + 1, flags);
224 if (w->res == NULL) {
225 device_printf(sc->dev,
226 "failed to allocate initial %s window: %#jx-%#jx\n",
227 w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
228 w->base = max_address;
230 pcib_write_windows(sc, w->mask);
233 pcib_activate_window(sc, type);
235 error = rman_manage_region(&w->rman, rman_get_start(w->res),
236 rman_get_end(w->res));
238 panic("Failed to initialize rman with resource");
242 * Initialize I/O windows.
245 pcib_probe_windows(struct pcib_softc *sc)
253 /* Determine if the I/O port window is implemented. */
254 val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
257 * If 'val' is zero, then only 16-bits of I/O space
260 pci_write_config(dev, PCIR_IOBASEL_1, 0xff, 1);
261 if (pci_read_config(dev, PCIR_IOBASEL_1, 1) != 0) {
263 pci_write_config(dev, PCIR_IOBASEL_1, 0, 1);
268 /* Read the existing I/O port window. */
270 sc->io.reg = PCIR_IOBASEL_1;
272 sc->io.mask = WIN_IO;
273 sc->io.name = "I/O port";
274 if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
275 sc->io.base = PCI_PPBIOBASE(
276 pci_read_config(dev, PCIR_IOBASEH_1, 2), val);
277 sc->io.limit = PCI_PPBIOLIMIT(
278 pci_read_config(dev, PCIR_IOLIMITH_1, 2),
279 pci_read_config(dev, PCIR_IOLIMITL_1, 1));
282 sc->io.base = PCI_PPBIOBASE(0, val);
283 sc->io.limit = PCI_PPBIOLIMIT(0,
284 pci_read_config(dev, PCIR_IOLIMITL_1, 1));
287 pcib_alloc_window(sc, &sc->io, SYS_RES_IOPORT, 0, max);
290 /* Read the existing memory window. */
292 sc->mem.reg = PCIR_MEMBASE_1;
294 sc->mem.mask = WIN_MEM;
295 sc->mem.name = "memory";
296 sc->mem.base = PCI_PPBMEMBASE(0,
297 pci_read_config(dev, PCIR_MEMBASE_1, 2));
298 sc->mem.limit = PCI_PPBMEMLIMIT(0,
299 pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
300 pcib_alloc_window(sc, &sc->mem, SYS_RES_MEMORY, 0, 0xffffffff);
302 /* Determine if the prefetchable memory window is implemented. */
303 val = pci_read_config(dev, PCIR_PMBASEL_1, 2);
306 * If 'val' is zero, then only 32-bits of memory space
309 pci_write_config(dev, PCIR_PMBASEL_1, 0xffff, 2);
310 if (pci_read_config(dev, PCIR_PMBASEL_1, 2) != 0) {
312 pci_write_config(dev, PCIR_PMBASEL_1, 0, 2);
317 /* Read the existing prefetchable memory window. */
318 if (sc->pmem.valid) {
319 sc->pmem.reg = PCIR_PMBASEL_1;
321 sc->pmem.mask = WIN_PMEM;
322 sc->pmem.name = "prefetch";
323 if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) {
324 sc->pmem.base = PCI_PPBMEMBASE(
325 pci_read_config(dev, PCIR_PMBASEH_1, 4), val);
326 sc->pmem.limit = PCI_PPBMEMLIMIT(
327 pci_read_config(dev, PCIR_PMLIMITH_1, 4),
328 pci_read_config(dev, PCIR_PMLIMITL_1, 2));
329 max = 0xffffffffffffffff;
331 sc->pmem.base = PCI_PPBMEMBASE(0, val);
332 sc->pmem.limit = PCI_PPBMEMLIMIT(0,
333 pci_read_config(dev, PCIR_PMLIMITL_1, 2));
336 pcib_alloc_window(sc, &sc->pmem, SYS_RES_MEMORY,
337 RF_PREFETCHABLE, max);
344 * Is the prefetch window open (eg, can we allocate memory in it?)
347 pcib_is_prefetch_open(struct pcib_softc *sc)
349 return (sc->pmembase > 0 && sc->pmembase < sc->pmemlimit);
353 * Is the nonprefetch window open (eg, can we allocate memory in it?)
356 pcib_is_nonprefetch_open(struct pcib_softc *sc)
358 return (sc->membase > 0 && sc->membase < sc->memlimit);
362 * Is the io window open (eg, can we allocate ports in it?)
365 pcib_is_io_open(struct pcib_softc *sc)
367 return (sc->iobase > 0 && sc->iobase < sc->iolimit);
371 * Get current I/O decode.
374 pcib_get_io_decode(struct pcib_softc *sc)
381 iolow = pci_read_config(dev, PCIR_IOBASEL_1, 1);
382 if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
383 sc->iobase = PCI_PPBIOBASE(
384 pci_read_config(dev, PCIR_IOBASEH_1, 2), iolow);
386 sc->iobase = PCI_PPBIOBASE(0, iolow);
388 iolow = pci_read_config(dev, PCIR_IOLIMITL_1, 1);
389 if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
390 sc->iolimit = PCI_PPBIOLIMIT(
391 pci_read_config(dev, PCIR_IOLIMITH_1, 2), iolow);
393 sc->iolimit = PCI_PPBIOLIMIT(0, iolow);
397 * Get current memory decode.
400 pcib_get_mem_decode(struct pcib_softc *sc)
407 sc->membase = PCI_PPBMEMBASE(0,
408 pci_read_config(dev, PCIR_MEMBASE_1, 2));
409 sc->memlimit = PCI_PPBMEMLIMIT(0,
410 pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
412 pmemlow = pci_read_config(dev, PCIR_PMBASEL_1, 2);
413 if ((pmemlow & PCIM_BRPM_MASK) == PCIM_BRPM_64)
414 sc->pmembase = PCI_PPBMEMBASE(
415 pci_read_config(dev, PCIR_PMBASEH_1, 4), pmemlow);
417 sc->pmembase = PCI_PPBMEMBASE(0, pmemlow);
419 pmemlow = pci_read_config(dev, PCIR_PMLIMITL_1, 2);
420 if ((pmemlow & PCIM_BRPM_MASK) == PCIM_BRPM_64)
421 sc->pmemlimit = PCI_PPBMEMLIMIT(
422 pci_read_config(dev, PCIR_PMLIMITH_1, 4), pmemlow);
424 sc->pmemlimit = PCI_PPBMEMLIMIT(0, pmemlow);
428 * Restore previous I/O decode.
431 pcib_set_io_decode(struct pcib_softc *sc)
438 iohi = sc->iobase >> 16;
440 pci_write_config(dev, PCIR_IOBASEH_1, iohi, 2);
441 pci_write_config(dev, PCIR_IOBASEL_1, sc->iobase >> 8, 1);
443 iohi = sc->iolimit >> 16;
445 pci_write_config(dev, PCIR_IOLIMITH_1, iohi, 2);
446 pci_write_config(dev, PCIR_IOLIMITL_1, sc->iolimit >> 8, 1);
450 * Restore previous memory decode.
453 pcib_set_mem_decode(struct pcib_softc *sc)
460 pci_write_config(dev, PCIR_MEMBASE_1, sc->membase >> 16, 2);
461 pci_write_config(dev, PCIR_MEMLIMIT_1, sc->memlimit >> 16, 2);
463 pmemhi = sc->pmembase >> 32;
465 pci_write_config(dev, PCIR_PMBASEH_1, pmemhi, 4);
466 pci_write_config(dev, PCIR_PMBASEL_1, sc->pmembase >> 16, 2);
468 pmemhi = sc->pmemlimit >> 32;
470 pci_write_config(dev, PCIR_PMLIMITH_1, pmemhi, 4);
471 pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmemlimit >> 16, 2);
476 * Get current bridge configuration.
479 pcib_cfg_save(struct pcib_softc *sc)
485 sc->command = pci_read_config(dev, PCIR_COMMAND, 2);
486 sc->pribus = pci_read_config(dev, PCIR_PRIBUS_1, 1);
487 sc->secbus = pci_read_config(dev, PCIR_SECBUS_1, 1);
488 sc->subbus = pci_read_config(dev, PCIR_SUBBUS_1, 1);
489 sc->bridgectl = pci_read_config(dev, PCIR_BRIDGECTL_1, 2);
490 sc->seclat = pci_read_config(dev, PCIR_SECLAT_1, 1);
492 if (sc->command & PCIM_CMD_PORTEN)
493 pcib_get_io_decode(sc);
494 if (sc->command & PCIM_CMD_MEMEN)
495 pcib_get_mem_decode(sc);
500 * Restore previous bridge configuration.
503 pcib_cfg_restore(struct pcib_softc *sc)
509 pci_write_config(dev, PCIR_COMMAND, sc->command, 2);
510 pci_write_config(dev, PCIR_PRIBUS_1, sc->pribus, 1);
511 pci_write_config(dev, PCIR_SECBUS_1, sc->secbus, 1);
512 pci_write_config(dev, PCIR_SUBBUS_1, sc->subbus, 1);
513 pci_write_config(dev, PCIR_BRIDGECTL_1, sc->bridgectl, 2);
514 pci_write_config(dev, PCIR_SECLAT_1, sc->seclat, 1);
516 pcib_write_windows(sc, WIN_IO | WIN_MEM | WIN_PMEM);
518 if (sc->command & PCIM_CMD_PORTEN)
519 pcib_set_io_decode(sc);
520 if (sc->command & PCIM_CMD_MEMEN)
521 pcib_set_mem_decode(sc);
526 * Generic device interface
529 pcib_probe(device_t dev)
531 if ((pci_get_class(dev) == PCIC_BRIDGE) &&
532 (pci_get_subclass(dev) == PCIS_BRIDGE_PCI)) {
533 device_set_desc(dev, "PCI-PCI bridge");
540 pcib_attach_common(device_t dev)
542 struct pcib_softc *sc;
543 struct sysctl_ctx_list *sctx;
544 struct sysctl_oid *soid;
546 sc = device_get_softc(dev);
550 * Get current bridge configuration.
552 sc->domain = pci_get_domain(dev);
553 sc->secstat = pci_read_config(dev, PCIR_SECSTAT_1, 2);
557 * Setup sysctl reporting nodes
559 sctx = device_get_sysctl_ctx(dev);
560 soid = device_get_sysctl_tree(dev);
561 SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "domain",
562 CTLFLAG_RD, &sc->domain, 0, "Domain number");
563 SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "pribus",
564 CTLFLAG_RD, &sc->pribus, 0, "Primary bus number");
565 SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "secbus",
566 CTLFLAG_RD, &sc->secbus, 0, "Secondary bus number");
567 SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
568 CTLFLAG_RD, &sc->subbus, 0, "Subordinate bus number");
573 switch (pci_get_devid(dev)) {
574 case 0x12258086: /* Intel 82454KX/GX (Orion) */
578 supbus = pci_read_config(dev, 0x41, 1);
579 if (supbus != 0xff) {
580 sc->secbus = supbus + 1;
581 sc->subbus = supbus + 1;
587 * The i82380FB mobile docking controller is a PCI-PCI bridge,
588 * and it is a subtractive bridge. However, the ProgIf is wrong
589 * so the normal setting of PCIB_SUBTRACTIVE bit doesn't
590 * happen. There's also a Toshiba bridge that behaves this
593 case 0x124b8086: /* Intel 82380FB Mobile */
594 case 0x060513d7: /* Toshiba ???? */
595 sc->flags |= PCIB_SUBTRACTIVE;
598 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
603 if ((cp = getenv("smbios.planar.maker")) == NULL)
605 if (strncmp(cp, "Compal", 6) != 0) {
610 if ((cp = getenv("smbios.planar.product")) == NULL)
612 if (strncmp(cp, "08A0", 4) != 0) {
617 if (sc->subbus < 0xa) {
618 pci_write_config(dev, PCIR_SUBBUS_1, 0xa, 1);
619 sc->subbus = pci_read_config(dev, PCIR_SUBBUS_1, 1);
625 if (pci_msi_device_blacklisted(dev))
626 sc->flags |= PCIB_DISABLE_MSI;
629 * Intel 815, 845 and other chipsets say they are PCI-PCI bridges,
630 * but have a ProgIF of 0x80. The 82801 family (AA, AB, BAM/CAM,
631 * BA/CA/DB and E) PCI bridges are HUB-PCI bridges, in Intelese.
632 * This means they act as if they were subtractively decoding
633 * bridges and pass all transactions. Mark them and real ProgIf 1
634 * parts as subtractive.
636 if ((pci_get_devid(dev) & 0xff00ffff) == 0x24008086 ||
637 pci_read_config(dev, PCIR_PROGIF, 1) == PCIP_BRIDGE_PCI_SUBTRACTIVE)
638 sc->flags |= PCIB_SUBTRACTIVE;
641 pcib_probe_windows(sc);
644 device_printf(dev, " domain %d\n", sc->domain);
645 device_printf(dev, " secondary bus %d\n", sc->secbus);
646 device_printf(dev, " subordinate bus %d\n", sc->subbus);
648 if (pcib_is_window_open(&sc->io))
649 device_printf(dev, " I/O decode 0x%jx-0x%jx\n",
650 (uintmax_t)sc->io.base, (uintmax_t)sc->io.limit);
651 if (pcib_is_window_open(&sc->mem))
652 device_printf(dev, " memory decode 0x%jx-0x%jx\n",
653 (uintmax_t)sc->mem.base, (uintmax_t)sc->mem.limit);
654 if (pcib_is_window_open(&sc->pmem))
655 device_printf(dev, " prefetched decode 0x%jx-0x%jx\n",
656 (uintmax_t)sc->pmem.base, (uintmax_t)sc->pmem.limit);
658 if (pcib_is_io_open(sc))
659 device_printf(dev, " I/O decode 0x%x-0x%x\n",
660 sc->iobase, sc->iolimit);
661 if (pcib_is_nonprefetch_open(sc))
662 device_printf(dev, " memory decode 0x%jx-0x%jx\n",
663 (uintmax_t)sc->membase, (uintmax_t)sc->memlimit);
664 if (pcib_is_prefetch_open(sc))
665 device_printf(dev, " prefetched decode 0x%jx-0x%jx\n",
666 (uintmax_t)sc->pmembase, (uintmax_t)sc->pmemlimit);
669 device_printf(dev, " no prefetched decode\n");
670 if (sc->flags & PCIB_SUBTRACTIVE)
671 device_printf(dev, " Subtractively decoded bridge.\n");
675 * XXX If the secondary bus number is zero, we should assign a bus number
676 * since the BIOS hasn't, then initialise the bridge. A simple
677 * bus_alloc_resource with the a couple of busses seems like the right
678 * approach, but we don't know what busses the BIOS might have already
679 * assigned to other bridges on this bus that probe later than we do.
681 * If the subordinate bus number is less than the secondary bus number,
682 * we should pick a better value. One sensible alternative would be to
683 * pick 255; the only tradeoff here is that configuration transactions
684 * would be more widely routed than absolutely necessary. We could
685 * then do a walk of the tree later and fix it.
690 pcib_attach(device_t dev)
692 struct pcib_softc *sc;
695 pcib_attach_common(dev);
696 sc = device_get_softc(dev);
697 if (sc->secbus != 0) {
698 child = device_add_child(dev, "pci", sc->secbus);
700 return(bus_generic_attach(dev));
703 /* no secondary bus; we should have fixed this */
708 pcib_suspend(device_t dev)
713 pcib_cfg_save(device_get_softc(dev));
714 error = bus_generic_suspend(dev);
715 if (error == 0 && pci_do_power_suspend) {
716 dstate = PCI_POWERSTATE_D3;
717 pcib = device_get_parent(device_get_parent(dev));
718 if (PCIB_POWER_FOR_SLEEP(pcib, dev, &dstate) == 0)
719 pci_set_powerstate(dev, dstate);
725 pcib_resume(device_t dev)
729 if (pci_do_power_resume) {
730 pcib = device_get_parent(device_get_parent(dev));
731 if (PCIB_POWER_FOR_SLEEP(pcib, dev, NULL) == 0)
732 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
734 pcib_cfg_restore(device_get_softc(dev));
735 return (bus_generic_resume(dev));
739 pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
741 struct pcib_softc *sc = device_get_softc(dev);
744 case PCIB_IVAR_DOMAIN:
745 *result = sc->domain;
748 *result = sc->secbus;
755 pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
757 struct pcib_softc *sc = device_get_softc(dev);
760 case PCIB_IVAR_DOMAIN:
771 * Attempt to allocate a resource from the existing resources assigned
774 static struct resource *
775 pcib_suballoc_resource(struct pcib_softc *sc, struct pcib_window *w,
776 device_t child, int type, int *rid, u_long start, u_long end, u_long count,
779 struct resource *res;
781 if (!pcib_is_window_open(w))
784 res = rman_reserve_resource(&w->rman, start, end, count,
785 flags & ~RF_ACTIVE, child);
790 device_printf(sc->dev,
791 "allocated %s range (%#lx-%#lx) for rid %x of %s\n",
792 w->name, rman_get_start(res), rman_get_end(res), *rid,
793 pcib_child_name(child));
794 rman_set_rid(res, *rid);
797 * If the resource should be active, pass that request up the
798 * tree. This assumes the parent drivers can handle
799 * activating sub-allocated resources.
801 if (flags & RF_ACTIVE) {
802 if (bus_activate_resource(child, type, *rid, res) != 0) {
803 rman_release_resource(res);
812 * Attempt to grow a window to make room for a given resource request.
813 * The 'step' parameter is log_2 of the desired I/O window's alignment.
816 pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
817 u_long start, u_long end, u_long count, u_int flags)
819 u_long align, start_free, end_free, front, back;
823 * Clamp the desired resource range to the maximum address
824 * this window supports. Reject impossible requests.
828 if (end > w->rman.rm_end)
829 end = w->rman.rm_end;
830 if (start + count - 1 > end || start + count < start)
834 * If there is no resource at all, just try to allocate enough
835 * aligned space for this resource.
837 if (w->res == NULL) {
838 if (RF_ALIGNMENT(flags) < w->step) {
839 flags &= ~RF_ALIGNMENT_MASK;
840 flags |= RF_ALIGNMENT_LOG2(w->step);
842 start &= ~((1ul << w->step) - 1);
843 end |= ((1ul << w->step) - 1);
844 count = roundup2(count, 1ul << w->step);
846 w->res = bus_alloc_resource(sc->dev, type, &rid, start, end,
847 count, flags & ~RF_ACTIVE);
848 if (w->res == NULL) {
850 device_printf(sc->dev,
851 "failed to allocate initial %s window (%#lx-%#lx,%#lx)\n",
852 w->name, start, end, count);
856 device_printf(sc->dev,
857 "allocated initial %s window of %#lx-%#lx\n",
858 w->name, rman_get_start(w->res),
859 rman_get_end(w->res));
860 error = rman_manage_region(&w->rman, rman_get_start(w->res),
861 rman_get_end(w->res));
864 device_printf(sc->dev,
865 "failed to add initial %s window to rman\n",
867 bus_release_resource(sc->dev, type, w->reg, w->res);
871 pcib_activate_window(sc, type);
876 * See if growing the window would help. Compute the minimum
877 * amount of address space needed on both the front and back
878 * ends of the existing window to satisfy the allocation.
880 * For each end, build a candidate region adjusting for the
881 * required alignment, etc. If there is a free region at the
882 * edge of the window, grow from the inner edge of the free
883 * region. Otherwise grow from the window boundary.
885 * XXX: Special case: if w->res is completely empty and the
886 * request size is larger than w->res, we should find the
887 * optimal aligned buffer containing w->res and allocate that.
890 device_printf(sc->dev,
891 "attempting to grow %s window for (%#lx-%#lx,%#lx)\n",
892 w->name, start, end, count);
893 align = 1ul << RF_ALIGNMENT(flags);
894 if (start < rman_get_start(w->res)) {
895 if (rman_first_free_region(&w->rman, &start_free, &end_free) !=
896 0 || start_free != rman_get_start(w->res))
897 end_free = rman_get_start(w->res) - 1;
901 /* Move end_free down until it is properly aligned. */
902 end_free &= ~(align - 1);
904 front = end_free - (count - 1);
907 * The resource would now be allocated at (front,
908 * end_free). Ensure that fits in the (start, end)
909 * bounds. end_free is checked above. If 'front' is
910 * ok, ensure it is properly aligned for this window.
911 * Also check for underflow.
913 if (front >= start && front <= end_free) {
915 printf("\tfront candidate range: %#lx-%#lx\n",
917 front &= (1ul << w->step) - 1;
918 front = rman_get_start(w->res) - front;
923 if (end > rman_get_end(w->res)) {
924 if (rman_last_free_region(&w->rman, &start_free, &end_free) !=
925 0 || end_free != rman_get_end(w->res))
926 start_free = rman_get_end(w->res) + 1;
927 if (start_free < start)
930 /* Move start_free up until it is properly aligned. */
931 start_free = roundup2(start_free, align);
932 back = start_free + count - 1;
935 * The resource would now be allocated at (start_free,
936 * back). Ensure that fits in the (start, end)
937 * bounds. start_free is checked above. If 'back' is
938 * ok, ensure it is properly aligned for this window.
939 * Also check for overflow.
941 if (back <= end && start_free <= back) {
943 printf("\tback candidate range: %#lx-%#lx\n",
945 back = roundup2(back + 1, 1ul << w->step) - 1;
946 back -= rman_get_end(w->res);
953 * Try to allocate the smallest needed region first.
954 * If that fails, fall back to the other region.
957 while (front != 0 || back != 0) {
958 if (front != 0 && (front <= back || back == 0)) {
959 error = bus_adjust_resource(sc->dev, type, w->res,
960 rman_get_start(w->res) - front,
961 rman_get_end(w->res));
966 error = bus_adjust_resource(sc->dev, type, w->res,
967 rman_get_start(w->res),
968 rman_get_end(w->res) + back);
978 device_printf(sc->dev, "grew %s window to %#lx-%#lx\n",
979 w->name, rman_get_start(w->res), rman_get_end(w->res));
981 /* Add the newly allocated region to the resource manager. */
982 if (w->base != rman_get_start(w->res)) {
983 KASSERT(w->limit == rman_get_end(w->res), ("both ends moved"));
984 error = rman_manage_region(&w->rman, rman_get_start(w->res),
987 KASSERT(w->limit != rman_get_end(w->res),
988 ("neither end moved"));
989 error = rman_manage_region(&w->rman, w->limit + 1,
990 rman_get_end(w->res));
994 device_printf(sc->dev,
995 "failed to expand %s resource manager\n", w->name);
996 bus_adjust_resource(sc->dev, type, w->res, w->base, w->limit);
1001 /* Save the new window. */
1002 w->base = rman_get_start(w->res);
1003 w->limit = rman_get_end(w->res);
1004 KASSERT((w->base & ((1ul << w->step) - 1)) == 0,
1005 ("start address is not aligned"));
1006 KASSERT((w->limit & ((1ul << w->step) - 1)) == (1ul << w->step) - 1,
1007 ("end address is not aligned"));
1008 pcib_write_windows(sc, w->mask);
1013 * We have to trap resource allocation requests and ensure that the bridge
1014 * is set up to, or capable of handling them.
1017 pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
1018 u_long start, u_long end, u_long count, u_int flags)
1020 struct pcib_softc *sc;
1023 sc = device_get_softc(dev);
1026 * VGA resources are decoded iff the VGA enable bit is set in
1027 * the bridge control register. VGA resources do not fall into
1028 * the resource windows and are passed up to the parent.
1030 if ((type == SYS_RES_IOPORT && pci_is_vga_ioport_range(start, end)) ||
1031 (type == SYS_RES_MEMORY && pci_is_vga_memory_range(start, end))) {
1032 if (sc->bridgectl & PCIB_BCR_VGA_ENABLE)
1033 return (bus_generic_alloc_resource(dev, child, type,
1034 rid, start, end, count, flags));
1040 case SYS_RES_IOPORT:
1041 r = pcib_suballoc_resource(sc, &sc->io, child, type, rid, start,
1045 if (pcib_grow_window(sc, &sc->io, type, start, end, count,
1047 r = pcib_suballoc_resource(sc, &sc->io, child, type,
1048 rid, start, end, count, flags);
1050 case SYS_RES_MEMORY:
1052 * For prefetchable resources, prefer the prefetchable
1053 * memory window, but fall back to the regular memory
1054 * window if that fails. Try both windows before
1055 * attempting to grow a window in case the firmware
1056 * has used a range in the regular memory window to
1057 * map a prefetchable BAR.
1059 if (flags & RF_PREFETCHABLE) {
1060 r = pcib_suballoc_resource(sc, &sc->pmem, child, type,
1061 rid, start, end, count, flags);
1065 r = pcib_suballoc_resource(sc, &sc->mem, child, type, rid,
1066 start, end, count, flags);
1069 if (flags & RF_PREFETCHABLE) {
1070 if (pcib_grow_window(sc, &sc->pmem, type, start, end,
1071 count, flags) == 0) {
1072 r = pcib_suballoc_resource(sc, &sc->pmem, child,
1073 type, rid, start, end, count, flags);
1078 if (pcib_grow_window(sc, &sc->mem, type, start, end, count,
1079 flags & ~RF_PREFETCHABLE) == 0)
1080 r = pcib_suballoc_resource(sc, &sc->mem, child, type,
1081 rid, start, end, count, flags);
1084 return (bus_generic_alloc_resource(dev, child, type, rid,
1085 start, end, count, flags));
1089 * If attempts to suballocate from the window fail but this is a
1090 * subtractive bridge, pass the request up the tree.
1092 if (sc->flags & PCIB_SUBTRACTIVE && r == NULL)
1093 return (bus_generic_alloc_resource(dev, child, type, rid,
1094 start, end, count, flags));
1099 pcib_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1100 u_long start, u_long end)
1102 struct pcib_softc *sc;
1104 sc = device_get_softc(bus);
1105 if (pcib_is_resource_managed(sc, type, r))
1106 return (rman_adjust_resource(r, start, end));
1107 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1111 pcib_release_resource(device_t dev, device_t child, int type, int rid,
1114 struct pcib_softc *sc;
1117 sc = device_get_softc(dev);
1118 if (pcib_is_resource_managed(sc, type, r)) {
1119 if (rman_get_flags(r) & RF_ACTIVE) {
1120 error = bus_deactivate_resource(child, type, rid, r);
1124 return (rman_release_resource(r));
1126 return (bus_generic_release_resource(dev, child, type, rid, r));
1130 * We have to trap resource allocation requests and ensure that the bridge
1131 * is set up to, or capable of handling them.
1134 pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
1135 u_long start, u_long end, u_long count, u_int flags)
1137 struct pcib_softc *sc = device_get_softc(dev);
1138 const char *name, *suffix;
1142 * Fail the allocation for this range if it's not supported.
1144 name = device_get_nameunit(child);
1151 case SYS_RES_IOPORT:
1153 if (!pcib_is_io_open(sc))
1155 ok = (start >= sc->iobase && end <= sc->iolimit);
1158 * Make sure we allow access to VGA I/O addresses when the
1159 * bridge has the "VGA Enable" bit set.
1161 if (!ok && pci_is_vga_ioport_range(start, end))
1162 ok = (sc->bridgectl & PCIB_BCR_VGA_ENABLE) ? 1 : 0;
1164 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
1166 if (start < sc->iobase)
1168 if (end > sc->iolimit)
1177 * If we overlap with the subtractive range, then
1178 * pick the upper range to use.
1180 if (start < sc->iolimit && end > sc->iobase)
1181 start = sc->iolimit + 1;
1185 device_printf(dev, "ioport: end (%lx) < start (%lx)\n",
1192 device_printf(dev, "%s%srequested unsupported I/O "
1193 "range 0x%lx-0x%lx (decoding 0x%x-0x%x)\n",
1194 name, suffix, start, end, sc->iobase, sc->iolimit);
1199 "%s%srequested I/O range 0x%lx-0x%lx: in range\n",
1200 name, suffix, start, end);
1203 case SYS_RES_MEMORY:
1205 if (pcib_is_nonprefetch_open(sc))
1206 ok = ok || (start >= sc->membase && end <= sc->memlimit);
1207 if (pcib_is_prefetch_open(sc))
1208 ok = ok || (start >= sc->pmembase && end <= sc->pmemlimit);
1211 * Make sure we allow access to VGA memory addresses when the
1212 * bridge has the "VGA Enable" bit set.
1214 if (!ok && pci_is_vga_memory_range(start, end))
1215 ok = (sc->bridgectl & PCIB_BCR_VGA_ENABLE) ? 1 : 0;
1217 if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
1220 if (flags & RF_PREFETCHABLE) {
1221 if (pcib_is_prefetch_open(sc)) {
1222 if (start < sc->pmembase)
1223 start = sc->pmembase;
1224 if (end > sc->pmemlimit)
1225 end = sc->pmemlimit;
1229 } else { /* non-prefetchable */
1230 if (pcib_is_nonprefetch_open(sc)) {
1231 if (start < sc->membase)
1232 start = sc->membase;
1233 if (end > sc->memlimit)
1241 ok = 1; /* subtractive bridge: always ok */
1243 if (pcib_is_nonprefetch_open(sc)) {
1244 if (start < sc->memlimit && end > sc->membase)
1245 start = sc->memlimit + 1;
1247 if (pcib_is_prefetch_open(sc)) {
1248 if (start < sc->pmemlimit && end > sc->pmembase)
1249 start = sc->pmemlimit + 1;
1254 device_printf(dev, "memory: end (%lx) < start (%lx)\n",
1260 if (!ok && bootverbose)
1262 "%s%srequested unsupported memory range %#lx-%#lx "
1263 "(decoding %#jx-%#jx, %#jx-%#jx)\n",
1264 name, suffix, start, end,
1265 (uintmax_t)sc->membase, (uintmax_t)sc->memlimit,
1266 (uintmax_t)sc->pmembase, (uintmax_t)sc->pmemlimit);
1270 device_printf(dev,"%s%srequested memory range "
1271 "0x%lx-0x%lx: good\n",
1272 name, suffix, start, end);
1279 * Bridge is OK decoding this resource, so pass it up.
1281 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
1290 pcib_maxslots(device_t dev)
1292 return(PCI_SLOTMAX);
1296 * Since we are a child of a PCI bus, its parent must support the pcib interface.
1299 pcib_read_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, int width)
1301 return(PCIB_READ_CONFIG(device_get_parent(device_get_parent(dev)), b, s, f, reg, width));
1305 pcib_write_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, uint32_t val, int width)
1307 PCIB_WRITE_CONFIG(device_get_parent(device_get_parent(dev)), b, s, f, reg, val, width);
1311 * Route an interrupt across a PCI bridge.
1314 pcib_route_interrupt(device_t pcib, device_t dev, int pin)
1322 * The PCI standard defines a swizzle of the child-side device/intpin to
1323 * the parent-side intpin as follows.
1325 * device = device on child bus
1326 * child_intpin = intpin on child bus slot (0-3)
1327 * parent_intpin = intpin on parent bus slot (0-3)
1329 * parent_intpin = (device + child_intpin) % 4
1331 parent_intpin = (pci_get_slot(dev) + (pin - 1)) % 4;
1334 * Our parent is a PCI bus. Its parent must export the pcib interface
1335 * which includes the ability to route interrupts.
1337 bus = device_get_parent(pcib);
1338 intnum = PCIB_ROUTE_INTERRUPT(device_get_parent(bus), pcib, parent_intpin + 1);
1339 if (PCI_INTERRUPT_VALID(intnum) && bootverbose) {
1340 device_printf(pcib, "slot %d INT%c is routed to irq %d\n",
1341 pci_get_slot(dev), 'A' + pin - 1, intnum);
1346 /* Pass request to alloc MSI/MSI-X messages up to the parent bridge. */
1348 pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
1350 struct pcib_softc *sc = device_get_softc(pcib);
1353 if (sc->flags & PCIB_DISABLE_MSI)
1355 bus = device_get_parent(pcib);
1356 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
1360 /* Pass request to release MSI/MSI-X messages up to the parent bridge. */
1362 pcib_release_msi(device_t pcib, device_t dev, int count, int *irqs)
1366 bus = device_get_parent(pcib);
1367 return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs));
1370 /* Pass request to alloc an MSI-X message up to the parent bridge. */
1372 pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
1374 struct pcib_softc *sc = device_get_softc(pcib);
1377 if (sc->flags & PCIB_DISABLE_MSI)
1379 bus = device_get_parent(pcib);
1380 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
1383 /* Pass request to release an MSI-X message up to the parent bridge. */
1385 pcib_release_msix(device_t pcib, device_t dev, int irq)
1389 bus = device_get_parent(pcib);
1390 return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq));
1393 /* Pass request to map MSI/MSI-X message up to parent bridge. */
1395 pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
1401 bus = device_get_parent(pcib);
1402 error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
1406 pci_ht_map_msi(pcib, *addr);
1410 /* Pass request for device power state up to parent bridge. */
1412 pcib_power_for_sleep(device_t pcib, device_t dev, int *pstate)
1416 bus = device_get_parent(pcib);
1417 return (PCIB_POWER_FOR_SLEEP(bus, dev, pstate));