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);
79 static int ofw_pci_translate_resource(device_t bus, int type,
80 rman_res_t start, rman_res_t *newstart);
83 static bus_space_tag_t ofw_pci_bus_get_bus_tag(device_t, device_t);
89 static int ofw_pci_maxslots(device_t);
94 static phandle_t ofw_pci_get_node(device_t, device_t);
99 static int ofw_pci_fill_ranges(phandle_t, struct ofw_pci_range *);
100 static struct rman *ofw_pci_get_rman(struct ofw_pci_softc *, int, u_int);
105 static device_method_t ofw_pci_methods[] = {
107 /* Device interface */
108 DEVMETHOD(device_attach, ofw_pci_attach),
111 DEVMETHOD(bus_print_child, bus_generic_print_child),
112 DEVMETHOD(bus_read_ivar, ofw_pci_read_ivar),
113 DEVMETHOD(bus_write_ivar, ofw_pci_write_ivar),
114 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
115 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
116 DEVMETHOD(bus_alloc_resource, ofw_pci_alloc_resource),
117 DEVMETHOD(bus_release_resource, ofw_pci_release_resource),
118 DEVMETHOD(bus_activate_resource, ofw_pci_activate_resource),
119 DEVMETHOD(bus_deactivate_resource, ofw_pci_deactivate_resource),
120 DEVMETHOD(bus_adjust_resource, ofw_pci_adjust_resource),
121 DEVMETHOD(bus_translate_resource, ofw_pci_translate_resource),
123 DEVMETHOD(bus_get_bus_tag, ofw_pci_bus_get_bus_tag),
127 DEVMETHOD(pcib_maxslots, ofw_pci_maxslots),
128 DEVMETHOD(pcib_route_interrupt, ofw_pci_route_interrupt),
129 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
131 /* ofw_bus interface */
132 DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node),
137 DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0);
140 ofw_pci_init(device_t dev)
142 struct ofw_pci_softc *sc;
144 u_int32_t busrange[2];
145 struct ofw_pci_range *rp;
147 struct ofw_pci_cell_info *cell_info;
149 node = ofw_bus_get_node(dev);
150 sc = device_get_softc(dev);
151 sc->sc_initialized = 1;
153 sc->sc_pci_domain = device_get_unit(dev);
155 cell_info = (struct ofw_pci_cell_info *)malloc(sizeof(*cell_info),
156 M_DEVBUF, M_WAITOK | M_ZERO);
158 sc->sc_cell_info = cell_info;
160 if (OF_getencprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
165 sc->sc_bus = busrange[0];
167 if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) {
172 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
173 n = ofw_pci_nranges(c, cell_info);
177 if (sc->sc_nrange == 0) {
181 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
184 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
185 n = ofw_pci_fill_ranges(c, &sc->sc_range[i]);
189 KASSERT(i == sc->sc_nrange, ("range count mismatch"));
191 sc->sc_nrange = ofw_pci_nranges(node, cell_info);
192 if (sc->sc_nrange <= 0) {
193 device_printf(dev, "could not getranges\n");
197 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
199 ofw_pci_fill_ranges(node, sc->sc_range);
202 sc->sc_io_rman.rm_type = RMAN_ARRAY;
203 sc->sc_io_rman.rm_descr = "PCI I/O Ports";
204 error = rman_init(&sc->sc_io_rman);
206 device_printf(dev, "rman_init() failed. error = %d\n", error);
210 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
211 sc->sc_mem_rman.rm_descr = "PCI Non Prefetchable Memory";
212 error = rman_init(&sc->sc_mem_rman);
214 device_printf(dev, "rman_init() failed. error = %d\n", error);
218 sc->sc_pmem_rman.rm_type = RMAN_ARRAY;
219 sc->sc_pmem_rman.rm_descr = "PCI Prefetchable Memory";
220 error = rman_init(&sc->sc_pmem_rman);
222 device_printf(dev, "rman_init() failed. error = %d\n", error);
226 for (i = 0; i < sc->sc_nrange; i++) {
228 rp = sc->sc_range + i;
230 if (sc->sc_range_mask & ((uint64_t)1 << i))
232 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
233 case OFW_PCI_PHYS_HI_SPACE_CONFIG:
235 case OFW_PCI_PHYS_HI_SPACE_IO:
236 error = rman_manage_region(&sc->sc_io_rman, rp->pci,
237 rp->pci + rp->size - 1);
239 case OFW_PCI_PHYS_HI_SPACE_MEM32:
240 case OFW_PCI_PHYS_HI_SPACE_MEM64:
241 if (rp->pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) {
242 sc->sc_have_pmem = 1;
243 error = rman_manage_region(&sc->sc_pmem_rman,
244 rp->pci, rp->pci + rp->size - 1);
246 error = rman_manage_region(&sc->sc_mem_rman,
247 rp->pci, rp->pci + rp->size - 1);
254 "rman_manage_region(%x, %#jx, %#jx) failed. "
255 "error = %d\n", rp->pci_hi &
256 OFW_PCI_PHYS_HI_SPACEMASK, rp->pci,
257 rp->pci + rp->size - 1, error);
262 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t));
266 free(cell_info, M_DEVBUF);
267 free(sc->sc_range, M_DEVBUF);
268 rman_fini(&sc->sc_io_rman);
269 rman_fini(&sc->sc_mem_rman);
270 rman_fini(&sc->sc_pmem_rman);
276 ofw_pci_attach(device_t dev)
278 struct ofw_pci_softc *sc;
281 sc = device_get_softc(dev);
282 if (!sc->sc_initialized) {
283 error = ofw_pci_init(dev);
288 device_add_child(dev, "pci", -1);
289 return (bus_generic_attach(dev));
293 ofw_pci_maxslots(device_t dev)
296 return (PCI_SLOTMAX);
300 ofw_pci_route_interrupt(device_t bus, device_t dev, int pin)
302 struct ofw_pci_softc *sc;
303 struct ofw_pci_register reg;
304 uint32_t pintr, mintr[PCI_MAP_INTR];
308 sc = device_get_softc(bus);
311 /* Fabricate imap information in case this isn't an OFW device */
312 bzero(®, sizeof(reg));
313 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) |
314 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) |
315 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT);
317 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev),
318 &sc->sc_pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr),
319 mintr, sizeof(mintr), &iparent);
320 if (intrcells != 0) {
321 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr);
326 * Maybe it's a real interrupt, not an intpin
328 if (pin > PCI_INTR_PINS)
331 device_printf(bus, "could not route pin %d for device %d.%d\n",
332 pin, pci_get_slot(dev), pci_get_function(dev));
333 return (PCI_INVALID_IRQ);
337 ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
339 struct ofw_pci_softc *sc;
341 sc = device_get_softc(dev);
344 case PCIB_IVAR_DOMAIN:
345 *result = sc->sc_pci_domain;
348 *result = sc->sc_bus;
358 ofw_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
360 struct ofw_pci_softc *sc;
362 sc = device_get_softc(dev);
376 ofw_pci_nranges(phandle_t node, struct ofw_pci_cell_info *info)
378 ssize_t nbase_ranges;
383 info->host_address_cells = 1;
384 info->size_cells = 2;
385 info->pci_address_cell = 3;
387 OF_getencprop(OF_parent(node), "#address-cells",
388 &(info->host_address_cells), sizeof(info->host_address_cells));
389 OF_getencprop(node, "#address-cells",
390 &(info->pci_address_cell), sizeof(info->pci_address_cell));
391 OF_getencprop(node, "#size-cells", &(info->size_cells),
392 sizeof(info->size_cells));
394 nbase_ranges = OF_getproplen(node, "ranges");
395 if (nbase_ranges <= 0)
398 return (nbase_ranges / sizeof(cell_t) /
399 (info->pci_address_cell + info->host_address_cells +
403 static struct resource *
404 ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
405 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
407 struct ofw_pci_softc *sc;
413 needactivate = flags & RF_ACTIVE;
416 sc = device_get_softc(bus);
418 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
419 if (type == PCI_RES_BUS) {
420 return (pci_domain_alloc_bus(sc->sc_pci_domain, child, rid,
421 start, end, count, flags | needactivate));
425 rm = ofw_pci_get_rman(sc, type, flags);
427 return (bus_generic_alloc_resource(bus, child, type, rid,
428 start, end, count, flags | needactivate));
431 rv = rman_reserve_resource(rm, start, end, count, flags, child);
433 device_printf(bus, "failed to reserve resource for %s\n",
434 device_get_nameunit(child));
438 rman_set_rid(rv, *rid);
441 if (bus_activate_resource(child, type, *rid, rv) != 0) {
443 "failed to activate resource for %s\n",
444 device_get_nameunit(child));
445 rman_release_resource(rv);
454 ofw_pci_release_resource(device_t bus, device_t child, int type, int rid,
455 struct resource *res)
457 struct ofw_pci_softc *sc;
461 sc = device_get_softc(bus);
463 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
464 if (type == PCI_RES_BUS)
465 return (pci_domain_release_bus(sc->sc_pci_domain, child, rid,
469 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
471 return (bus_generic_release_resource(bus, child, type, rid,
474 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
476 if (rman_get_flags(res) & RF_ACTIVE) {
477 error = bus_deactivate_resource(child, type, rid, res);
481 return (rman_release_resource(res));
485 ofw_pci_translate_resource(device_t bus, int type, rman_res_t start,
486 rman_res_t *newstart)
488 struct ofw_pci_softc *sc;
489 struct ofw_pci_range *rp;
492 sc = device_get_softc(bus);
495 * Map this through the ranges list
497 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
498 rp->pci_hi != 0; rp++) {
499 if (start < rp->pci || start >= rp->pci + rp->size)
502 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
503 case OFW_PCI_PHYS_HI_SPACE_IO:
504 space = SYS_RES_IOPORT;
506 case OFW_PCI_PHYS_HI_SPACE_MEM32:
507 case OFW_PCI_PHYS_HI_SPACE_MEM64:
508 space = SYS_RES_MEMORY;
515 start += (rp->host - rp->pci);
524 ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid,
525 struct resource *res)
527 struct ofw_pci_softc *sc;
528 bus_space_handle_t handle;
530 struct ofw_pci_range *rp;
535 sc = device_get_softc(bus);
537 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
538 return (bus_generic_activate_resource(bus, child, type, rid,
542 start = (vm_paddr_t)rman_get_start(res);
545 * Map this through the ranges list
547 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
548 rp->pci_hi != 0; rp++) {
549 if (start < rp->pci || start >= rp->pci + rp->size)
552 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
553 case OFW_PCI_PHYS_HI_SPACE_IO:
554 space = SYS_RES_IOPORT;
556 case OFW_PCI_PHYS_HI_SPACE_MEM32:
557 case OFW_PCI_PHYS_HI_SPACE_MEM64:
558 space = SYS_RES_MEMORY;
565 start += (rp->host - rp->pci);
571 printf("ofw_pci mapdev: start %jx, len %jd\n",
572 (rman_res_t)start, rman_get_size(res));
574 tag = BUS_GET_BUS_TAG(child, child);
578 rman_set_bustag(res, tag);
579 rv = bus_space_map(tag, start,
580 rman_get_size(res), 0, &handle);
584 rman_set_bushandle(res, handle);
585 rman_set_virtual(res, (void *)handle); /* XXX for powerpc only ? */
587 return (rman_activate_resource(res));
591 static bus_space_tag_t
592 ofw_pci_bus_get_bus_tag(device_t bus, device_t child)
600 ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid,
601 struct resource *res)
605 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
606 return (bus_generic_deactivate_resource(bus, child, type, rid,
610 psize = rman_get_size(res);
611 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
613 return (rman_deactivate_resource(res));
617 ofw_pci_adjust_resource(device_t bus, device_t child, int type,
618 struct resource *res, rman_res_t start, rman_res_t end)
621 struct ofw_pci_softc *sc;
623 sc = device_get_softc(bus);
624 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
625 if (type == PCI_RES_BUS)
626 return (pci_domain_adjust_bus(sc->sc_pci_domain, child, res,
630 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
632 return (bus_generic_adjust_resource(bus, child, type, res,
635 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
636 KASSERT(!(rman_get_flags(res) & RF_ACTIVE),
637 ("active resources cannot be adjusted"));
639 return (rman_adjust_resource(res, start, end));
643 ofw_pci_get_node(device_t bus, device_t dev)
645 struct ofw_pci_softc *sc;
647 sc = device_get_softc(bus);
648 /* We only have one child, the PCI bus, which needs our own node. */
650 return (sc->sc_node);
654 ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges)
656 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2;
658 ssize_t nbase_ranges;
662 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells,
663 sizeof(host_address_cells));
664 OF_getencprop(node, "#address-cells", &pci_address_cells,
665 sizeof(pci_address_cells));
666 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells));
668 nbase_ranges = OF_getproplen(node, "ranges");
669 if (nbase_ranges <= 0)
671 nranges = nbase_ranges / sizeof(cell_t) /
672 (pci_address_cells + host_address_cells + size_cells);
674 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
675 OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
677 for (i = 0, j = 0; i < nranges; i++) {
678 ranges[i].pci_hi = base_ranges[j++];
680 for (k = 0; k < pci_address_cells - 1; k++) {
681 ranges[i].pci <<= 32;
682 ranges[i].pci |= base_ranges[j++];
685 for (k = 0; k < host_address_cells; k++) {
686 ranges[i].host <<= 32;
687 ranges[i].host |= base_ranges[j++];
690 for (k = 0; k < size_cells; k++) {
691 ranges[i].size <<= 32;
692 ranges[i].size |= base_ranges[j++];
696 free(base_ranges, M_DEVBUF);
701 ofw_pci_get_rman(struct ofw_pci_softc *sc, int type, u_int flags)
706 return (&sc->sc_io_rman);
708 if (sc->sc_have_pmem && (flags & RF_PREFETCHABLE))
709 return (&sc->sc_pmem_rman);
711 return (&sc->sc_mem_rman);