2 * Copyright (c) 2011 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/module.h>
34 #include <sys/kernel.h>
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_pci.h>
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/ofw/ofwpci.h>
43 #include <dev/pci/pcivar.h>
44 #include <dev/pci/pcireg.h>
45 #include <dev/pci/pcib_private.h>
47 #include <machine/bus.h>
48 #include <machine/md_var.h>
49 #include <machine/resource.h>
57 * If it is necessary to set another value of this for
58 * some platforms it should be set at fdt.h file
61 #define PCI_MAP_INTR 4
64 #define PCI_INTR_PINS 4
69 static struct resource * ofw_pci_alloc_resource(device_t, device_t,
70 int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
71 static int ofw_pci_release_resource(device_t, device_t, int, int,
73 static int ofw_pci_activate_resource(device_t, device_t, int, int,
75 static int ofw_pci_deactivate_resource(device_t, device_t, int, int,
77 static int ofw_pci_adjust_resource(device_t, device_t, int,
78 struct resource *, rman_res_t, rman_res_t);
81 static bus_space_tag_t ofw_pci_bus_get_bus_tag(device_t, device_t);
87 static int ofw_pci_maxslots(device_t);
92 static phandle_t ofw_pci_get_node(device_t, device_t);
97 static int ofw_pci_fill_ranges(phandle_t, struct ofw_pci_range *);
98 static struct rman *ofw_pci_get_rman(struct ofw_pci_softc *, int, u_int);
103 static device_method_t ofw_pci_methods[] = {
105 /* Device interface */
106 DEVMETHOD(device_attach, ofw_pci_attach),
109 DEVMETHOD(bus_print_child, bus_generic_print_child),
110 DEVMETHOD(bus_read_ivar, ofw_pci_read_ivar),
111 DEVMETHOD(bus_write_ivar, ofw_pci_write_ivar),
112 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
113 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
114 DEVMETHOD(bus_alloc_resource, ofw_pci_alloc_resource),
115 DEVMETHOD(bus_release_resource, ofw_pci_release_resource),
116 DEVMETHOD(bus_activate_resource, ofw_pci_activate_resource),
117 DEVMETHOD(bus_deactivate_resource, ofw_pci_deactivate_resource),
118 DEVMETHOD(bus_adjust_resource, ofw_pci_adjust_resource),
120 DEVMETHOD(bus_get_bus_tag, ofw_pci_bus_get_bus_tag),
124 DEVMETHOD(pcib_maxslots, ofw_pci_maxslots),
125 DEVMETHOD(pcib_route_interrupt, ofw_pci_route_interrupt),
126 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
128 /* ofw_bus interface */
129 DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node),
134 DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0);
137 ofw_pci_init(device_t dev)
139 struct ofw_pci_softc *sc;
141 u_int32_t busrange[2];
142 struct ofw_pci_range *rp;
144 struct ofw_pci_cell_info *cell_info;
146 node = ofw_bus_get_node(dev);
147 sc = device_get_softc(dev);
148 sc->sc_initialized = 1;
150 sc->sc_pci_domain = device_get_unit(dev);
152 cell_info = (struct ofw_pci_cell_info *)malloc(sizeof(*cell_info),
153 M_DEVBUF, M_WAITOK | M_ZERO);
155 sc->sc_cell_info = cell_info;
157 if (OF_getencprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
162 sc->sc_bus = busrange[0];
164 if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) {
169 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
170 n = ofw_pci_nranges(c, cell_info);
174 if (sc->sc_nrange == 0) {
178 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
181 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
182 n = ofw_pci_fill_ranges(c, &sc->sc_range[i]);
186 KASSERT(i == sc->sc_nrange, ("range count mismatch"));
188 sc->sc_nrange = ofw_pci_nranges(node, cell_info);
189 if (sc->sc_nrange <= 0) {
190 device_printf(dev, "could not getranges\n");
194 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
196 ofw_pci_fill_ranges(node, sc->sc_range);
199 sc->sc_io_rman.rm_type = RMAN_ARRAY;
200 sc->sc_io_rman.rm_descr = "PCI I/O Ports";
201 error = rman_init(&sc->sc_io_rman);
203 device_printf(dev, "rman_init() failed. error = %d\n", error);
207 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
208 sc->sc_mem_rman.rm_descr = "PCI Non Prefetchable Memory";
209 error = rman_init(&sc->sc_mem_rman);
211 device_printf(dev, "rman_init() failed. error = %d\n", error);
215 sc->sc_pmem_rman.rm_type = RMAN_ARRAY;
216 sc->sc_pmem_rman.rm_descr = "PCI Prefetchable Memory";
217 error = rman_init(&sc->sc_pmem_rman);
219 device_printf(dev, "rman_init() failed. error = %d\n", error);
223 for (i = 0; i < sc->sc_nrange; i++) {
225 rp = sc->sc_range + i;
227 if (sc->sc_range_mask & ((uint64_t)1 << i))
229 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
230 case OFW_PCI_PHYS_HI_SPACE_CONFIG:
232 case OFW_PCI_PHYS_HI_SPACE_IO:
233 error = rman_manage_region(&sc->sc_io_rman, rp->pci,
234 rp->pci + rp->size - 1);
236 case OFW_PCI_PHYS_HI_SPACE_MEM32:
237 case OFW_PCI_PHYS_HI_SPACE_MEM64:
238 if (rp->pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) {
239 sc->sc_have_pmem = 1;
240 error = rman_manage_region(&sc->sc_pmem_rman,
241 rp->pci, rp->pci + rp->size - 1);
243 error = rman_manage_region(&sc->sc_mem_rman,
244 rp->pci, rp->pci + rp->size - 1);
251 "rman_manage_region(%x, %#jx, %#jx) failed. "
252 "error = %d\n", rp->pci_hi &
253 OFW_PCI_PHYS_HI_SPACEMASK, rp->pci,
254 rp->pci + rp->size - 1, error);
259 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t));
263 free(cell_info, M_DEVBUF);
264 free(sc->sc_range, M_DEVBUF);
265 rman_fini(&sc->sc_io_rman);
266 rman_fini(&sc->sc_mem_rman);
267 rman_fini(&sc->sc_pmem_rman);
273 ofw_pci_attach(device_t dev)
275 struct ofw_pci_softc *sc;
278 sc = device_get_softc(dev);
279 if (!sc->sc_initialized) {
280 error = ofw_pci_init(dev);
285 device_add_child(dev, "pci", -1);
286 return (bus_generic_attach(dev));
290 ofw_pci_maxslots(device_t dev)
293 return (PCI_SLOTMAX);
297 ofw_pci_route_interrupt(device_t bus, device_t dev, int pin)
299 struct ofw_pci_softc *sc;
300 struct ofw_pci_register reg;
301 uint32_t pintr, mintr[PCI_MAP_INTR];
305 sc = device_get_softc(bus);
308 /* Fabricate imap information in case this isn't an OFW device */
309 bzero(®, sizeof(reg));
310 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) |
311 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) |
312 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT);
314 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev),
315 &sc->sc_pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr),
316 mintr, sizeof(mintr), &iparent);
317 if (intrcells != 0) {
318 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr);
323 * Maybe it's a real interrupt, not an intpin
325 if (pin > PCI_INTR_PINS)
328 device_printf(bus, "could not route pin %d for device %d.%d\n",
329 pin, pci_get_slot(dev), pci_get_function(dev));
330 return (PCI_INVALID_IRQ);
334 ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
336 struct ofw_pci_softc *sc;
338 sc = device_get_softc(dev);
341 case PCIB_IVAR_DOMAIN:
342 *result = sc->sc_pci_domain;
345 *result = sc->sc_bus;
355 ofw_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
357 struct ofw_pci_softc *sc;
359 sc = device_get_softc(dev);
373 ofw_pci_nranges(phandle_t node, struct ofw_pci_cell_info *info)
375 ssize_t nbase_ranges;
380 info->host_address_cells = 1;
381 info->size_cells = 2;
382 info->pci_address_cell = 3;
384 OF_getencprop(OF_parent(node), "#address-cells",
385 &(info->host_address_cells), sizeof(info->host_address_cells));
386 OF_getencprop(node, "#address-cells",
387 &(info->pci_address_cell), sizeof(info->pci_address_cell));
388 OF_getencprop(node, "#size-cells", &(info->size_cells),
389 sizeof(info->size_cells));
391 nbase_ranges = OF_getproplen(node, "ranges");
392 if (nbase_ranges <= 0)
395 return (nbase_ranges / sizeof(cell_t) /
396 (info->pci_address_cell + info->host_address_cells +
400 static struct resource *
401 ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
402 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
404 struct ofw_pci_softc *sc;
410 needactivate = flags & RF_ACTIVE;
413 sc = device_get_softc(bus);
415 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
416 if (type == PCI_RES_BUS) {
417 return (pci_domain_alloc_bus(sc->sc_pci_domain, child, rid,
418 start, end, count, flags | needactivate));
422 rm = ofw_pci_get_rman(sc, type, flags);
424 return (bus_generic_alloc_resource(bus, child, type, rid,
425 start, end, count, flags | needactivate));
428 rv = rman_reserve_resource(rm, start, end, count, flags, child);
430 device_printf(bus, "failed to reserve resource for %s\n",
431 device_get_nameunit(child));
435 rman_set_rid(rv, *rid);
438 if (bus_activate_resource(child, type, *rid, rv) != 0) {
440 "failed to activate resource for %s\n",
441 device_get_nameunit(child));
442 rman_release_resource(rv);
451 ofw_pci_release_resource(device_t bus, device_t child, int type, int rid,
452 struct resource *res)
454 struct ofw_pci_softc *sc;
458 sc = device_get_softc(bus);
460 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
461 if (type == PCI_RES_BUS)
462 return (pci_domain_release_bus(sc->sc_pci_domain, child, rid,
466 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
468 return (bus_generic_release_resource(bus, child, type, rid,
471 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
473 if (rman_get_flags(res) & RF_ACTIVE) {
474 error = bus_deactivate_resource(child, type, rid, res);
478 return (rman_release_resource(res));
482 ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid,
483 struct resource *res)
485 struct ofw_pci_softc *sc;
486 bus_space_handle_t handle;
488 struct ofw_pci_range *rp;
493 sc = device_get_softc(bus);
495 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
496 return (bus_generic_activate_resource(bus, child, type, rid,
500 start = (vm_paddr_t)rman_get_start(res);
503 * Map this through the ranges list
505 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
506 rp->pci_hi != 0; rp++) {
507 if (start < rp->pci || start >= rp->pci + rp->size)
510 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
511 case OFW_PCI_PHYS_HI_SPACE_IO:
512 space = SYS_RES_IOPORT;
514 case OFW_PCI_PHYS_HI_SPACE_MEM32:
515 case OFW_PCI_PHYS_HI_SPACE_MEM64:
516 space = SYS_RES_MEMORY;
523 start += (rp->host - rp->pci);
529 printf("ofw_pci mapdev: start %jx, len %jd\n",
530 (rman_res_t)start, rman_get_size(res));
532 tag = BUS_GET_BUS_TAG(child, child);
536 rman_set_bustag(res, tag);
537 rv = bus_space_map(tag, start,
538 rman_get_size(res), 0, &handle);
542 rman_set_bushandle(res, handle);
543 rman_set_virtual(res, (void *)handle); /* XXX for powerpc only ? */
545 return (rman_activate_resource(res));
549 static bus_space_tag_t
550 ofw_pci_bus_get_bus_tag(device_t bus, device_t child)
558 ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid,
559 struct resource *res)
561 struct ofw_pci_softc *sc;
564 sc = device_get_softc(bus);
566 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
567 return (bus_generic_deactivate_resource(bus, child, type, rid,
571 psize = rman_get_size(res);
572 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
574 return (rman_deactivate_resource(res));
578 ofw_pci_adjust_resource(device_t bus, device_t child, int type,
579 struct resource *res, rman_res_t start, rman_res_t end)
582 struct ofw_pci_softc *sc;
584 sc = device_get_softc(bus);
585 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
586 if (type == PCI_RES_BUS)
587 return (pci_domain_adjust_bus(sc->sc_pci_domain, child, res,
591 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
593 return (bus_generic_adjust_resource(bus, child, type, res,
596 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
597 KASSERT(!(rman_get_flags(res) & RF_ACTIVE),
598 ("active resources cannot be adjusted"));
600 return (rman_adjust_resource(res, start, end));
604 ofw_pci_get_node(device_t bus, device_t dev)
606 struct ofw_pci_softc *sc;
608 sc = device_get_softc(bus);
609 /* We only have one child, the PCI bus, which needs our own node. */
611 return (sc->sc_node);
615 ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges)
617 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2;
619 ssize_t nbase_ranges;
623 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells,
624 sizeof(host_address_cells));
625 OF_getencprop(node, "#address-cells", &pci_address_cells,
626 sizeof(pci_address_cells));
627 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells));
629 nbase_ranges = OF_getproplen(node, "ranges");
630 if (nbase_ranges <= 0)
632 nranges = nbase_ranges / sizeof(cell_t) /
633 (pci_address_cells + host_address_cells + size_cells);
635 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
636 OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
638 for (i = 0, j = 0; i < nranges; i++) {
639 ranges[i].pci_hi = base_ranges[j++];
641 for (k = 0; k < pci_address_cells - 1; k++) {
642 ranges[i].pci <<= 32;
643 ranges[i].pci |= base_ranges[j++];
646 for (k = 0; k < host_address_cells; k++) {
647 ranges[i].host <<= 32;
648 ranges[i].host |= base_ranges[j++];
651 for (k = 0; k < size_cells; k++) {
652 ranges[i].size <<= 32;
653 ranges[i].size |= base_ranges[j++];
657 free(base_ranges, M_DEVBUF);
662 ofw_pci_get_rman(struct ofw_pci_softc *sc, int type, u_int flags)
667 return (&sc->sc_io_rman);
669 if (sc->sc_have_pmem && (flags & RF_PREFETCHABLE))
670 return (&sc->sc_pmem_rman);
672 return (&sc->sc_mem_rman);