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),
127 /* ofw_bus interface */
128 DEVMETHOD(ofw_bus_get_node, ofw_pci_get_node),
133 DEFINE_CLASS_0(ofw_pci, ofw_pci_driver, ofw_pci_methods, 0);
136 ofw_pci_init(device_t dev)
138 struct ofw_pci_softc *sc;
140 u_int32_t busrange[2];
141 struct ofw_pci_range *rp;
143 struct ofw_pci_cell_info *cell_info;
145 node = ofw_bus_get_node(dev);
146 sc = device_get_softc(dev);
147 sc->sc_initialized = 1;
149 sc->sc_pci_domain = device_get_unit(dev);
151 cell_info = (struct ofw_pci_cell_info *)malloc(sizeof(*cell_info),
152 M_DEVBUF, M_WAITOK | M_ZERO);
154 sc->sc_cell_info = cell_info;
156 if (OF_getencprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
161 sc->sc_bus = busrange[0];
163 if (sc->sc_quirks & OFW_PCI_QUIRK_RANGES_ON_CHILDREN) {
168 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
169 n = ofw_pci_nranges(c, cell_info);
173 if (sc->sc_nrange == 0) {
177 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
180 for (c = OF_child(node); c != 0; c = OF_peer(c)) {
181 n = ofw_pci_fill_ranges(c, &sc->sc_range[i]);
185 KASSERT(i == sc->sc_nrange, ("range count mismatch"));
187 sc->sc_nrange = ofw_pci_nranges(node, cell_info);
188 if (sc->sc_nrange <= 0) {
189 device_printf(dev, "could not getranges\n");
193 sc->sc_range = malloc(sc->sc_nrange * sizeof(sc->sc_range[0]),
195 ofw_pci_fill_ranges(node, sc->sc_range);
198 sc->sc_io_rman.rm_type = RMAN_ARRAY;
199 sc->sc_io_rman.rm_descr = "PCI I/O Ports";
200 error = rman_init(&sc->sc_io_rman);
202 device_printf(dev, "rman_init() failed. error = %d\n", error);
206 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
207 sc->sc_mem_rman.rm_descr = "PCI Non Prefetchable Memory";
208 error = rman_init(&sc->sc_mem_rman);
210 device_printf(dev, "rman_init() failed. error = %d\n", error);
214 sc->sc_pmem_rman.rm_type = RMAN_ARRAY;
215 sc->sc_pmem_rman.rm_descr = "PCI Prefetchable Memory";
216 error = rman_init(&sc->sc_pmem_rman);
218 device_printf(dev, "rman_init() failed. error = %d\n", error);
222 for (i = 0; i < sc->sc_nrange; i++) {
224 rp = sc->sc_range + i;
226 if (sc->sc_range_mask & ((uint64_t)1 << i))
228 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
229 case OFW_PCI_PHYS_HI_SPACE_CONFIG:
231 case OFW_PCI_PHYS_HI_SPACE_IO:
232 error = rman_manage_region(&sc->sc_io_rman, rp->pci,
233 rp->pci + rp->size - 1);
235 case OFW_PCI_PHYS_HI_SPACE_MEM32:
236 case OFW_PCI_PHYS_HI_SPACE_MEM64:
237 if (rp->pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) {
238 sc->sc_have_pmem = 1;
239 error = rman_manage_region(&sc->sc_pmem_rman,
240 rp->pci, rp->pci + rp->size - 1);
242 error = rman_manage_region(&sc->sc_mem_rman,
243 rp->pci, rp->pci + rp->size - 1);
250 "rman_manage_region(%x, %#jx, %#jx) failed. "
251 "error = %d\n", rp->pci_hi &
252 OFW_PCI_PHYS_HI_SPACEMASK, rp->pci,
253 rp->pci + rp->size - 1, error);
258 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t));
262 free(cell_info, M_DEVBUF);
263 free(sc->sc_range, M_DEVBUF);
264 rman_fini(&sc->sc_io_rman);
265 rman_fini(&sc->sc_mem_rman);
266 rman_fini(&sc->sc_pmem_rman);
272 ofw_pci_attach(device_t dev)
274 struct ofw_pci_softc *sc;
277 sc = device_get_softc(dev);
278 if (!sc->sc_initialized) {
279 error = ofw_pci_init(dev);
284 device_add_child(dev, "pci", -1);
285 return (bus_generic_attach(dev));
289 ofw_pci_maxslots(device_t dev)
292 return (PCI_SLOTMAX);
296 ofw_pci_route_interrupt(device_t bus, device_t dev, int pin)
298 struct ofw_pci_softc *sc;
299 struct ofw_pci_register reg;
300 uint32_t pintr, mintr[PCI_MAP_INTR];
304 sc = device_get_softc(bus);
307 /* Fabricate imap information in case this isn't an OFW device */
308 bzero(®, sizeof(reg));
309 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) |
310 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) |
311 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT);
313 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev),
314 &sc->sc_pci_iinfo, ®, sizeof(reg), &pintr, sizeof(pintr),
315 mintr, sizeof(mintr), &iparent);
316 if (intrcells != 0) {
317 pintr = ofw_bus_map_intr(dev, iparent, intrcells, mintr);
322 * Maybe it's a real interrupt, not an intpin
324 if (pin > PCI_INTR_PINS)
327 device_printf(bus, "could not route pin %d for device %d.%d\n",
328 pin, pci_get_slot(dev), pci_get_function(dev));
329 return (PCI_INVALID_IRQ);
333 ofw_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
335 struct ofw_pci_softc *sc;
337 sc = device_get_softc(dev);
340 case PCIB_IVAR_DOMAIN:
341 *result = sc->sc_pci_domain;
344 *result = sc->sc_bus;
354 ofw_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
356 struct ofw_pci_softc *sc;
358 sc = device_get_softc(dev);
372 ofw_pci_nranges(phandle_t node, struct ofw_pci_cell_info *info)
374 ssize_t nbase_ranges;
379 info->host_address_cells = 1;
380 info->size_cells = 2;
381 info->pci_address_cell = 3;
383 OF_getencprop(OF_parent(node), "#address-cells",
384 &(info->host_address_cells), sizeof(info->host_address_cells));
385 OF_getencprop(node, "#address-cells",
386 &(info->pci_address_cell), sizeof(info->pci_address_cell));
387 OF_getencprop(node, "#size-cells", &(info->size_cells),
388 sizeof(info->size_cells));
390 nbase_ranges = OF_getproplen(node, "ranges");
391 if (nbase_ranges <= 0)
394 return (nbase_ranges / sizeof(cell_t) /
395 (info->pci_address_cell + info->host_address_cells +
399 static struct resource *
400 ofw_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
401 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
403 struct ofw_pci_softc *sc;
409 needactivate = flags & RF_ACTIVE;
412 sc = device_get_softc(bus);
414 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
415 if (type == PCI_RES_BUS) {
416 return (pci_domain_alloc_bus(sc->sc_pci_domain, child, rid,
417 start, end, count, flags | needactivate));
421 rm = ofw_pci_get_rman(sc, type, flags);
423 return (bus_generic_alloc_resource(bus, child, type, rid,
424 start, end, count, flags | needactivate));
427 rv = rman_reserve_resource(rm, start, end, count, flags, child);
429 device_printf(bus, "failed to reserve resource for %s\n",
430 device_get_nameunit(child));
434 rman_set_rid(rv, *rid);
437 if (bus_activate_resource(child, type, *rid, rv) != 0) {
439 "failed to activate resource for %s\n",
440 device_get_nameunit(child));
441 rman_release_resource(rv);
450 ofw_pci_release_resource(device_t bus, device_t child, int type, int rid,
451 struct resource *res)
453 struct ofw_pci_softc *sc;
457 sc = device_get_softc(bus);
459 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
460 if (type == PCI_RES_BUS)
461 return (pci_domain_release_bus(sc->sc_pci_domain, child, rid,
465 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
467 return (bus_generic_release_resource(bus, child, type, rid,
470 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
472 if (rman_get_flags(res) & RF_ACTIVE) {
473 error = bus_deactivate_resource(child, type, rid, res);
477 return (rman_release_resource(res));
481 ofw_pci_activate_resource(device_t bus, device_t child, int type, int rid,
482 struct resource *res)
484 struct ofw_pci_softc *sc;
485 bus_space_handle_t handle;
487 struct ofw_pci_range *rp;
492 sc = device_get_softc(bus);
494 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
495 return (bus_generic_activate_resource(bus, child, type, rid,
499 start = (vm_paddr_t)rman_get_start(res);
502 * Map this through the ranges list
504 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange &&
505 rp->pci_hi != 0; rp++) {
506 if (start < rp->pci || start >= rp->pci + rp->size)
509 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
510 case OFW_PCI_PHYS_HI_SPACE_IO:
511 space = SYS_RES_IOPORT;
513 case OFW_PCI_PHYS_HI_SPACE_MEM32:
514 case OFW_PCI_PHYS_HI_SPACE_MEM64:
515 space = SYS_RES_MEMORY;
522 start += (rp->host - rp->pci);
528 printf("ofw_pci mapdev: start %jx, len %jd\n",
529 (rman_res_t)start, rman_get_size(res));
531 tag = BUS_GET_BUS_TAG(child, child);
535 rman_set_bustag(res, tag);
536 rv = bus_space_map(tag, start,
537 rman_get_size(res), 0, &handle);
541 rman_set_bushandle(res, handle);
542 rman_set_virtual(res, (void *)handle); /* XXX for powerpc only ? */
544 return (rman_activate_resource(res));
548 static bus_space_tag_t
549 ofw_pci_bus_get_bus_tag(device_t bus, device_t child)
557 ofw_pci_deactivate_resource(device_t bus, device_t child, int type, int rid,
558 struct resource *res)
560 struct ofw_pci_softc *sc;
563 sc = device_get_softc(bus);
565 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) {
566 return (bus_generic_deactivate_resource(bus, child, type, rid,
570 psize = rman_get_size(res);
571 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
573 return (rman_deactivate_resource(res));
577 ofw_pci_adjust_resource(device_t bus, device_t child, int type,
578 struct resource *res, rman_res_t start, rman_res_t end)
581 struct ofw_pci_softc *sc;
583 sc = device_get_softc(bus);
584 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
585 if (type == PCI_RES_BUS)
586 return (pci_domain_adjust_bus(sc->sc_pci_domain, child, res,
590 rm = ofw_pci_get_rman(sc, type, rman_get_flags(res));
592 return (bus_generic_adjust_resource(bus, child, type, res,
595 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
596 KASSERT(!(rman_get_flags(res) & RF_ACTIVE),
597 ("active resources cannot be adjusted"));
599 return (rman_adjust_resource(res, start, end));
603 ofw_pci_get_node(device_t bus, device_t dev)
605 struct ofw_pci_softc *sc;
607 sc = device_get_softc(bus);
608 /* We only have one child, the PCI bus, which needs our own node. */
610 return (sc->sc_node);
614 ofw_pci_fill_ranges(phandle_t node, struct ofw_pci_range *ranges)
616 int host_address_cells = 1, pci_address_cells = 3, size_cells = 2;
618 ssize_t nbase_ranges;
622 OF_getencprop(OF_parent(node), "#address-cells", &host_address_cells,
623 sizeof(host_address_cells));
624 OF_getencprop(node, "#address-cells", &pci_address_cells,
625 sizeof(pci_address_cells));
626 OF_getencprop(node, "#size-cells", &size_cells, sizeof(size_cells));
628 nbase_ranges = OF_getproplen(node, "ranges");
629 if (nbase_ranges <= 0)
631 nranges = nbase_ranges / sizeof(cell_t) /
632 (pci_address_cells + host_address_cells + size_cells);
634 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
635 OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
637 for (i = 0, j = 0; i < nranges; i++) {
638 ranges[i].pci_hi = base_ranges[j++];
640 for (k = 0; k < pci_address_cells - 1; k++) {
641 ranges[i].pci <<= 32;
642 ranges[i].pci |= base_ranges[j++];
645 for (k = 0; k < host_address_cells; k++) {
646 ranges[i].host <<= 32;
647 ranges[i].host |= base_ranges[j++];
650 for (k = 0; k < size_cells; k++) {
651 ranges[i].size <<= 32;
652 ranges[i].size |= base_ranges[j++];
656 free(base_ranges, M_DEVBUF);
661 ofw_pci_get_rman(struct ofw_pci_softc *sc, int type, u_int flags)
666 return (&sc->sc_io_rman);
668 if (sc->sc_have_pmem && (flags & RF_PREFETCHABLE))
669 return (&sc->sc_pmem_rman);
671 return (&sc->sc_mem_rman);