2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 #include <sys/sysctl.h>
39 #include <contrib/dev/acpica/acpi.h>
40 #include <dev/acpica/acpivar.h>
42 #include <machine/pci_cfgreg.h>
43 #include <dev/pci/pcivar.h>
44 #include <dev/pci/pcib_private.h>
47 #include <dev/acpica/acpi_pcibvar.h>
49 /* Hooks for the ACPI CA debugging infrastructure. */
50 #define _COMPONENT ACPI_BUS
51 ACPI_MODULE_NAME("PCI_ACPI")
53 struct acpi_hpcib_softc {
55 ACPI_HANDLE ap_handle;
58 int ap_segment; /* analagous to Alpha 'hose' */
59 int ap_bus; /* bios-assigned bus number */
61 ACPI_BUFFER ap_prt; /* interrupt routing table */
64 static int acpi_pcib_acpi_probe(device_t bus);
65 static int acpi_pcib_acpi_attach(device_t bus);
66 static int acpi_pcib_acpi_resume(device_t bus);
67 static int acpi_pcib_read_ivar(device_t dev, device_t child,
68 int which, uintptr_t *result);
69 static int acpi_pcib_write_ivar(device_t dev, device_t child,
70 int which, uintptr_t value);
71 static uint32_t acpi_pcib_read_config(device_t dev, int bus, int slot,
72 int func, int reg, int bytes);
73 static void acpi_pcib_write_config(device_t dev, int bus, int slot,
74 int func, int reg, uint32_t data, int bytes);
75 static int acpi_pcib_acpi_route_interrupt(device_t pcib,
76 device_t dev, int pin);
77 static int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
78 int count, int maxcount, int *irqs);
79 static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
81 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
82 device_t child, int type, int *rid,
83 u_long start, u_long end, u_long count,
86 static device_method_t acpi_pcib_acpi_methods[] = {
87 /* Device interface */
88 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
89 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
90 DEVMETHOD(device_shutdown, bus_generic_shutdown),
91 DEVMETHOD(device_suspend, bus_generic_suspend),
92 DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
95 DEVMETHOD(bus_print_child, bus_generic_print_child),
96 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
97 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
98 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
99 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
100 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
101 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
102 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
103 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
106 DEVMETHOD(pcib_maxslots, pcib_maxslots),
107 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
108 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
109 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
110 DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
111 DEVMETHOD(pcib_release_msi, pcib_release_msi),
112 DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
113 DEVMETHOD(pcib_remap_msix, pcib_remap_msix),
114 DEVMETHOD(pcib_release_msix, pcib_release_msix),
119 static devclass_t pcib_devclass;
121 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
122 sizeof(struct acpi_hpcib_softc));
123 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
124 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
127 acpi_pcib_acpi_probe(device_t dev)
129 static char *pcib_ids[] = { "PNP0A03", NULL };
131 if (acpi_disabled("pcib") ||
132 ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
135 if (pci_cfgregopen() == 0)
137 device_set_desc(dev, "ACPI Host-PCI bridge");
142 acpi_pcib_acpi_attach(device_t dev)
144 struct acpi_hpcib_softc *sc;
146 u_int addr, slot, func, busok;
149 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
151 sc = device_get_softc(dev);
153 sc->ap_handle = acpi_get_handle(dev);
156 * Get our base bus number by evaluating _BBN.
157 * If this doesn't work, we assume we're bus number 0.
159 * XXX note that it may also not exist in the case where we are
160 * meant to use a private configuration space mechanism for this bus,
161 * so we should dig out our resources and check to see if we have
162 * anything like that. How do we do this?
163 * XXX If we have the requisite information, and if we don't think the
164 * default PCI configuration space handlers can deal with this bus,
165 * we should attach our own handler.
166 * XXX invoke _REG on this for the PCI config space address space?
167 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
168 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
169 * if _BBN is zero and pcib0 already exists, we try to read our
170 * bus number from the configuration registers at address _ADR.
172 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
173 if (ACPI_FAILURE(status)) {
174 if (status != AE_NOT_FOUND) {
175 device_printf(dev, "could not evaluate _BBN - %s\n",
176 AcpiFormatException(status));
177 return_VALUE (ENXIO);
179 /* If it's not found, assume 0. */
185 * If the bus is zero and pcib0 already exists, read the bus number
186 * via PCI config space.
189 if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
191 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
192 if (ACPI_FAILURE(status)) {
193 if (status != AE_NOT_FOUND) {
194 device_printf(dev, "could not evaluate _ADR - %s\n",
195 AcpiFormatException(status));
196 return_VALUE (ENXIO);
198 device_printf(dev, "couldn't find _ADR\n");
200 /* XXX: We assume bus 0. */
201 slot = ACPI_ADR_PCI_SLOT(addr);
202 func = ACPI_ADR_PCI_FUNC(addr);
204 device_printf(dev, "reading config registers from 0:%d:%d\n",
206 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
207 device_printf(dev, "couldn't read bus number from cfg space\n");
216 * If nothing else worked, hope that ACPI at least lays out the
217 * host-PCI bridges in order and that as a result our unit number
218 * is actually our bus number. There are several reasons this
222 sc->ap_bus = device_get_unit(dev);
223 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
227 * Get our segment number by evaluating _SEG
228 * It's OK for this to not exist.
230 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
231 if (ACPI_FAILURE(status)) {
232 if (status != AE_NOT_FOUND) {
233 device_printf(dev, "could not evaluate _SEG - %s\n",
234 AcpiFormatException(status));
235 return_VALUE (ENXIO);
237 /* If it's not found, assume 0. */
241 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
245 acpi_pcib_acpi_resume(device_t dev)
248 return (acpi_pcib_resume(dev));
252 * Support for standard PCI bridge ivars.
255 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
257 struct acpi_hpcib_softc *sc = device_get_softc(dev);
261 *result = sc->ap_bus;
263 case ACPI_IVAR_HANDLE:
264 *result = (uintptr_t)sc->ap_handle;
266 case ACPI_IVAR_FLAGS:
267 *result = (uintptr_t)sc->ap_flags;
274 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
276 struct acpi_hpcib_softc *sc = device_get_softc(dev);
282 case ACPI_IVAR_HANDLE:
283 sc->ap_handle = (ACPI_HANDLE)value;
285 case ACPI_IVAR_FLAGS:
286 sc->ap_flags = (int)value;
293 acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg,
296 return (pci_cfgregread(bus, slot, func, reg, bytes));
300 acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
301 uint32_t data, int bytes)
303 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
307 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
309 struct acpi_hpcib_softc *sc = device_get_softc(pcib);
311 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
315 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
320 bus = device_get_parent(pcib);
321 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
326 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int index, int *irq)
330 bus = device_get_parent(pcib);
331 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, index, irq));
334 static u_long acpi_host_mem_start = 0x80000000;
335 TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
338 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
339 u_long start, u_long end, u_long count, u_int flags)
342 * If no memory preference is given, use upper 32MB slot most
343 * bioses use for their memory window. Typically other bridges
344 * before us get in the way to assert their preferences on memory.
345 * Hardcoding like this sucks, so a more MD/MI way needs to be
346 * found to do it. This is typically only used on older laptops
347 * that don't have pci busses behind pci bridge, so assuming > 32MB
350 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
351 start = acpi_host_mem_start;
352 if (type == SYS_RES_IOPORT && start == 0UL && end == ~0UL)
354 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,