1 /*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
14 *
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
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/5.3/sys/dev/acpica/acpi_pcib.c 133621 2004-08-13 06:22:07Z njl $");
30
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36
37 #include "acpi.h"
38 #include <dev/acpica/acpivar.h>
39 #include <dev/acpica/acpi_pcibvar.h>
40
41 #include <dev/pci/pcivar.h>
42 #include "pcib_if.h"
43
44 /* Hooks for the ACPI CA debugging infrastructure. */
45 #define _COMPONENT ACPI_BUS
46 ACPI_MODULE_NAME("PCI")
47
48 ACPI_SERIAL_DECL(pcib, "ACPI PCI bus methods");
49
50 /*
51 * For locking, we assume the caller is not concurrent since this is
52 * triggered by newbus methods.
53 */
54 int
55 acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
56 {
57 device_t child;
58 ACPI_STATUS status;
59
60 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
61
62 /*
63 * Don't attach if we're not really there.
64 *
65 * XXX: This isn't entirely correct since we may be a PCI bus
66 * on a hot-plug docking station, etc.
67 */
68 if (!acpi_DeviceIsPresent(dev))
69 return_VALUE(ENXIO);
70
71 /*
72 * Get the PCI interrupt routing table for this bus. If we can't
73 * get it, this is not an error but may reduce functionality.
74 */
75 prt->Length = ACPI_ALLOCATE_BUFFER;
76 status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
77 if (ACPI_FAILURE(status))
78 device_printf(dev,
79 "could not get PCI interrupt routing table for %s - %s\n",
80 acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
81
82 /*
83 * Attach the PCI bus proper.
84 */
85 if ((child = device_add_child(dev, "pci", busno)) == NULL) {
86 device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
87 return_VALUE(ENXIO);
88 }
89
90 /*
91 * Now go scan the bus.
92 */
93 acpi_pci_link_config(dev, prt, busno);
94
95 return_VALUE (bus_generic_attach(dev));
96 }
97
98 int
99 acpi_pcib_resume(device_t dev)
100 {
101 acpi_pci_link_resume(dev);
102 return (bus_generic_resume(dev));
103 }
104
105 /*
106 * Route an interrupt for a child of the bridge.
107 */
108 int
109 acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
110 {
111 struct acpi_prt_entry *entry;
112 int i, interrupt;
113 struct acpi_pci_link_entry *link;
114 ACPI_PCI_ROUTING_TABLE *prt;
115
116 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
117
118 interrupt = PCI_INVALID_IRQ;
119
120 /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
121 pin--;
122
123 ACPI_SERIAL_BEGIN(pcib);
124
125 /* Look up the PRT entry for this device. */
126 entry = acpi_pci_find_prt(pcib, dev, pin);
127 if (entry == NULL) {
128 device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev),
129 pci_get_slot(dev), 'A' + pin);
130 goto out;
131 }
132 prt = &entry->prt;
133 link = entry->pci_link;
134 if (bootverbose) {
135 device_printf(pcib, "matched entry for %d.%d.INT%c",
136 pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
137 if (prt->Source[0] != '\0')
138 printf(" (src %s)", acpi_name(entry->prt_source));
139 printf("\n");
140 }
141
142 /*
143 * If source is empty/NULL, the source index is a global IRQ number
144 * and it's hard-wired so we're done.
145 */
146 if (prt->Source == NULL || prt->Source[0] == '\0') {
147 if (bootverbose)
148 device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
149 pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
150 if (prt->SourceIndex)
151 interrupt = prt->SourceIndex;
152 else
153 device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
154 goto out;
155 }
156
157 /* XXX Support for multiple resources must be added to the link code. */
158 if (prt->SourceIndex) {
159 device_printf(pcib, "src index %d not yet supported\n",
160 prt->SourceIndex);
161 goto out;
162 }
163
164 /* There has to be at least one interrupt available. */
165 if (link->number_of_interrupts == 0) {
166 device_printf(pcib, "device has no interrupts\n");
167 goto out;
168 }
169
170 /*
171 * If the current interrupt has been routed, we're done. This is the
172 * case when the BIOS initializes it and we didn't disable it.
173 */
174 if (link->flags & ACPI_LINK_ROUTED) {
175 interrupt = link->current_irq;
176 if (bootverbose)
177 device_printf(pcib, "slot %d INT%c is already routed to irq %d\n",
178 pci_get_slot(dev), 'A' + pin, interrupt);
179 goto out;
180 }
181
182 if (bootverbose) {
183 device_printf(pcib, "possible interrupts:");
184 for (i = 0; i < link->number_of_interrupts; i++)
185 printf("%3d", link->interrupts[i]);
186 printf("\n");
187 }
188
189 /*
190 * Perform the link routing. The link code will pick the best IRQ
191 * for this pin and configure it.
192 */
193 interrupt = acpi_pci_link_route(dev, entry);
194
195 if (bootverbose && PCI_INTERRUPT_VALID(interrupt))
196 device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
197 pci_get_slot(dev), 'A' + pin, interrupt,
198 acpi_name(entry->prt_source));
199
200 out:
201 ACPI_SERIAL_END(pcib);
202
203 return_VALUE (interrupt);
204 }
Cache object: 008a4405f5ae038fba8d5475f0f98fc9
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