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
27 * $FreeBSD: src/sys/dev/acpica/acpi_pcib_acpi.c,v 1.55.8.1 2009/04/15 03:14:26 kensmith Exp $
31 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/module.h>
37 #include <sys/sysctl.h>
40 #include <dev/acpica/acpivar.h>
42 #include <bus/pci/pci_cfgreg.h>
43 #include <bus/pci/pcivar.h>
44 #include <bus/pci/pcib_private.h>
47 #include <dev/acpica/acpi_pcibvar.h>
49 /* Hooks for the ACPICA 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
, int cpuid
);
79 static int acpi_pcib_map_msi(device_t pcib
, device_t dev
,
80 int irq
, uint64_t *addr
, uint32_t *data
, int cpuid
);
81 static int acpi_pcib_alloc_msix(device_t pcib
, device_t dev
,
83 static struct resource
*acpi_pcib_acpi_alloc_resource(device_t dev
,
84 device_t child
, int type
, int *rid
,
85 u_long start
, u_long end
, u_long count
,
86 u_int flags
, int cpuid
);
88 static device_method_t acpi_pcib_acpi_methods
[] = {
89 /* Device interface */
90 DEVMETHOD(device_probe
, acpi_pcib_acpi_probe
),
91 DEVMETHOD(device_attach
, acpi_pcib_acpi_attach
),
92 DEVMETHOD(device_shutdown
, bus_generic_shutdown
),
93 DEVMETHOD(device_suspend
, bus_generic_suspend
),
94 DEVMETHOD(device_resume
, acpi_pcib_acpi_resume
),
97 DEVMETHOD(bus_print_child
, bus_generic_print_child
),
98 DEVMETHOD(bus_read_ivar
, acpi_pcib_read_ivar
),
99 DEVMETHOD(bus_write_ivar
, acpi_pcib_write_ivar
),
100 DEVMETHOD(bus_alloc_resource
, acpi_pcib_acpi_alloc_resource
),
101 /* DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), */
102 DEVMETHOD(bus_release_resource
, bus_generic_release_resource
),
103 DEVMETHOD(bus_activate_resource
, bus_generic_activate_resource
),
104 DEVMETHOD(bus_deactivate_resource
, bus_generic_deactivate_resource
),
105 DEVMETHOD(bus_setup_intr
, bus_generic_setup_intr
),
106 DEVMETHOD(bus_teardown_intr
, bus_generic_teardown_intr
),
109 DEVMETHOD(pcib_maxslots
, pcib_maxslots
),
110 DEVMETHOD(pcib_read_config
, acpi_pcib_read_config
),
111 DEVMETHOD(pcib_write_config
, acpi_pcib_write_config
),
112 DEVMETHOD(pcib_route_interrupt
, acpi_pcib_acpi_route_interrupt
),
113 DEVMETHOD(pcib_alloc_msi
, acpi_pcib_alloc_msi
),
114 DEVMETHOD(pcib_release_msi
, pcib_release_msi
),
115 DEVMETHOD(pcib_alloc_msix
, acpi_pcib_alloc_msix
),
116 DEVMETHOD(pcib_release_msix
, pcib_release_msix
),
117 DEVMETHOD(pcib_map_msi
, acpi_pcib_map_msi
),
121 static devclass_t pcib_devclass
;
123 DEFINE_CLASS_0(pcib
, acpi_pcib_acpi_driver
, acpi_pcib_acpi_methods
,
124 sizeof(struct acpi_hpcib_softc
));
125 DRIVER_MODULE(acpi_pcib
, acpi
, acpi_pcib_acpi_driver
, pcib_devclass
, NULL
, NULL
);
126 MODULE_DEPEND(acpi_pcib
, acpi
, 1, 1, 1);
129 acpi_pcib_acpi_probe(device_t dev
)
133 static char *pcib_ids
[] = { "PNP0A03", "PNP0A08", NULL
};
135 if (acpi_disabled("pcib") ||
136 ACPI_ID_PROBE(device_get_parent(dev
), dev
, pcib_ids
) == NULL
)
139 error
= acpi_pcib_probe(dev
);
143 device_set_desc(dev
, "ACPI Host-PCI bridge");
148 acpi_pcib_acpi_attach(device_t dev
)
150 struct acpi_hpcib_softc
*sc
;
152 static int bus0_seen
= 0;
153 u_int addr
, slot
, func
, busok
;
156 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
158 sc
= device_get_softc(dev
);
160 sc
->ap_handle
= acpi_get_handle(dev
);
163 * Get our segment number by evaluating _SEG
164 * It's OK for this to not exist.
166 status
= acpi_GetInteger(sc
->ap_handle
, "_SEG", &sc
->ap_segment
);
167 if (ACPI_FAILURE(status
)) {
168 if (status
!= AE_NOT_FOUND
) {
169 device_printf(dev
, "could not evaluate _SEG - %s\n",
170 AcpiFormatException(status
));
171 return_VALUE (ENXIO
);
173 /* If it's not found, assume 0. */
178 * Get our base bus number by evaluating _BBN.
179 * If this doesn't work, we assume we're bus number 0.
181 * XXX note that it may also not exist in the case where we are
182 * meant to use a private configuration space mechanism for this bus,
183 * so we should dig out our resources and check to see if we have
184 * anything like that. How do we do this?
185 * XXX If we have the requisite information, and if we don't think the
186 * default PCI configuration space handlers can deal with this bus,
187 * we should attach our own handler.
188 * XXX invoke _REG on this for the PCI config space address space?
189 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
190 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
191 * if _BBN is zero and PCI bus 0 already exists, we try to read our
192 * bus number from the configuration registers at address _ADR.
193 * We only do this for domain/segment 0 in the hopes that this is
194 * only needed for old single-domain machines.
196 status
= acpi_GetInteger(sc
->ap_handle
, "_BBN", &sc
->ap_bus
);
197 if (ACPI_FAILURE(status
)) {
198 if (status
!= AE_NOT_FOUND
) {
199 device_printf(dev
, "could not evaluate _BBN - %s\n",
200 AcpiFormatException(status
));
201 return_VALUE (ENXIO
);
203 /* If it's not found, assume 0. */
209 * If this is segment 0, the bus is zero, and PCI bus 0 already
210 * exists, read the bus number via PCI config space.
213 if (sc
->ap_segment
== 0 && sc
->ap_bus
== 0 && bus0_seen
) {
215 status
= acpi_GetInteger(sc
->ap_handle
, "_ADR", &addr
);
216 if (ACPI_FAILURE(status
)) {
217 if (status
!= AE_NOT_FOUND
) {
218 device_printf(dev
, "could not evaluate _ADR - %s\n",
219 AcpiFormatException(status
));
220 return_VALUE (ENXIO
);
222 device_printf(dev
, "couldn't find _ADR\n");
224 /* XXX: We assume bus 0. */
225 slot
= ACPI_ADR_PCI_SLOT(addr
);
226 func
= ACPI_ADR_PCI_FUNC(addr
);
228 device_printf(dev
, "reading config registers from 0:%d:%d\n",
230 if (host_pcib_get_busno(pci_cfgregread
, 0, slot
, func
, &busno
) == 0)
231 device_printf(dev
, "couldn't read bus number from cfg space\n");
240 * If nothing else worked, hope that ACPI at least lays out the
241 * host-PCI bridges in order and that as a result our unit number
242 * is actually our bus number. There are several reasons this
246 sc
->ap_bus
= device_get_unit(dev
);
247 device_printf(dev
, "trying bus number %d\n", sc
->ap_bus
);
250 /* If this is bus 0 on segment 0, note that it has been seen already. */
251 if (sc
->ap_segment
== 0 && sc
->ap_bus
== 0)
254 return (acpi_pcib_attach(dev
, &sc
->ap_prt
, sc
->ap_bus
));
258 acpi_pcib_acpi_resume(device_t dev
)
261 return (acpi_pcib_resume(dev
));
265 * Support for standard PCI bridge ivars.
268 acpi_pcib_read_ivar(device_t dev
, device_t child
, int which
, uintptr_t *result
)
270 struct acpi_hpcib_softc
*sc
= device_get_softc(dev
);
273 case PCIB_IVAR_DOMAIN
:
274 *result
= sc
->ap_segment
;
277 *result
= sc
->ap_bus
;
279 case ACPI_IVAR_HANDLE
:
280 *result
= (uintptr_t)sc
->ap_handle
;
282 case ACPI_IVAR_FLAGS
:
283 *result
= (uintptr_t)sc
->ap_flags
;
290 acpi_pcib_write_ivar(device_t dev
, device_t child
, int which
, uintptr_t value
)
292 struct acpi_hpcib_softc
*sc
= device_get_softc(dev
);
295 case PCIB_IVAR_DOMAIN
:
300 case ACPI_IVAR_HANDLE
:
301 sc
->ap_handle
= (ACPI_HANDLE
)value
;
303 case ACPI_IVAR_FLAGS
:
304 sc
->ap_flags
= (int)value
;
311 acpi_pcib_read_config(device_t dev
, int bus
, int slot
, int func
, int reg
,
314 return (pci_cfgregread(bus
, slot
, func
, reg
, bytes
));
318 acpi_pcib_write_config(device_t dev
, int bus
, int slot
, int func
, int reg
,
319 uint32_t data
, int bytes
)
321 pci_cfgregwrite(bus
, slot
, func
, reg
, data
, bytes
);
325 acpi_pcib_acpi_route_interrupt(device_t pcib
, device_t dev
, int pin
)
327 struct acpi_hpcib_softc
*sc
= device_get_softc(pcib
);
329 return (acpi_pcib_route_interrupt(pcib
, dev
, pin
, &sc
->ap_prt
));
333 acpi_pcib_alloc_msi(device_t pcib
, device_t dev
, int count
, int maxcount
,
334 int *irqs
, int cpuid
)
338 bus
= device_get_parent(pcib
);
339 return (PCIB_ALLOC_MSI(device_get_parent(bus
), dev
, count
, maxcount
,
344 acpi_pcib_alloc_msix(device_t pcib
, device_t dev
, int *irq
, int cpuid
)
348 bus
= device_get_parent(pcib
);
349 return (PCIB_ALLOC_MSIX(device_get_parent(bus
), dev
, irq
, cpuid
));
353 acpi_pcib_map_msi(device_t pcib
, device_t dev
, int irq
, uint64_t *addr
,
354 uint32_t *data
, int cpuid
)
358 bus
= device_get_parent(pcib
);
359 return (PCIB_MAP_MSI(device_get_parent(bus
), dev
, irq
, addr
, data
,
363 static u_long acpi_host_mem_start
= 0x80000000;
364 TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start
);
366 static struct resource
*
367 acpi_pcib_acpi_alloc_resource(device_t dev
, device_t child
, int type
, int *rid
,
368 u_long start
, u_long end
, u_long count
, u_int flags
, int cpuid
)
371 * If no memory preference is given, use upper 32MB slot most
372 * bioses use for their memory window. Typically other bridges
373 * before us get in the way to assert their preferences on memory.
374 * Hardcoding like this sucks, so a more MD/MI way needs to be
375 * found to do it. This is typically only used on older laptops
376 * that don't have pci busses behind pci bridge, so assuming > 32MB
379 * PCI-PCI bridges may allocate smaller ranges for their windows,
380 * but the heuristics here should apply to those, so we allow
381 * several different end addresses.
383 if (type
== SYS_RES_MEMORY
&& start
== 0UL && (end
== ~0UL ||
385 start
= acpi_host_mem_start
;
386 if (type
== SYS_RES_IOPORT
&& start
== 0UL && (end
== ~0UL ||
387 end
== 0xffff || end
== 0xffffffff))
389 return (bus_generic_alloc_resource(dev
, child
, type
, rid
, start
, end
,
390 count
, flags
, cpuid
));