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>
| 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>
|
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
46ACPI_MODULE_NAME("PCI")
47
48ACPI_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
55struct prt_lookup_request {
56 ACPI_PCI_ROUTING_TABLE *pr_entry;
57 u_int pr_pin;
58 u_int pr_slot;
59};
60
61typedef void prt_entry_handler(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
62
63static void prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
64static void prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
65static void prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler,
66 void *arg);
67
68static void
69prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler, void *arg)
70{
71 ACPI_PCI_ROUTING_TABLE *entry;
72 char *prtptr;
73
74 /* First check to see if there is a table to walk. */
75 if (prt == NULL || prt->Pointer == NULL)
76 return;
77
78 /* Walk the table executing the handler function for each entry. */
79 prtptr = prt->Pointer;
80 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
81 while (entry->Length != 0) {
82 handler(entry, arg);
83 prtptr += entry->Length;
84 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
85 }
86}
87
88static void
89prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
90{
91 ACPI_HANDLE handle;
92 device_t child, pcib;
93 int error;
94
95 /* We only care about entries that reference a link device. */
96 if (entry->Source == NULL || entry->Source[0] == '\0')
97 return;
98
99 /* Lookup the associated handle and device. */
100 pcib = (device_t)arg;
101 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, entry->Source, &handle)))
102 return;
103 child = acpi_get_device(handle);
104 if (child == NULL)
105 return;
106
107 /* If the device hasn't been probed yet, force it to do so. */
108 error = device_probe_and_attach(child);
109 if (error != 0) {
110 device_printf(pcib, "failed to force attach of %s\n",
111 acpi_name(handle));
112 return;
113 }
114
115 /* Add a reference for a specific bus/device/pin tuple. */
116 acpi_pci_link_add_reference(child, entry->SourceIndex, pcib,
117 ACPI_ADR_PCI_SLOT(entry->Address), entry->Pin);
118}
119
120int
121acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
122{
123 device_t child;
124 ACPI_STATUS status;
125
126 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
127
128 /*
129 * Don't attach if we're not really there.
130 *
131 * XXX: This isn't entirely correct since we may be a PCI bus
132 * on a hot-plug docking station, etc.
133 */
134 if (!acpi_DeviceIsPresent(dev))
135 return_VALUE(ENXIO);
136
137 /*
138 * Get the PCI interrupt routing table for this bus. If we can't
139 * get it, this is not an error but may reduce functionality. There
140 * are several valid bridges in the field that do not have a _PRT, so
141 * only warn about missing tables if bootverbose is set.
142 */
143 prt->Length = ACPI_ALLOCATE_BUFFER;
144 status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
145 if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND))
146 device_printf(dev,
147 "could not get PCI interrupt routing table for %s - %s\n",
148 acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
149
150 /*
151 * Attach the PCI bus proper.
152 */
153 if ((child = device_add_child(dev, "pci", busno)) == NULL) {
154 device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
155 return_VALUE(ENXIO);
156 }
157
158 /*
159 * Now go scan the bus.
160 */
161 prt_walk_table(prt, prt_attach_devices, dev);
162
163 return_VALUE (bus_generic_attach(dev));
164}
165
166int
167acpi_pcib_resume(device_t dev)
168{
169
170 return (bus_generic_resume(dev));
171}
172
173static void
174prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
175{
176 struct prt_lookup_request *pr;
177
178 pr = (struct prt_lookup_request *)arg;
179 if (pr->pr_entry != NULL)
180 return;
181
182 /*
183 * Compare the slot number (high word of Address) and pin number
184 * (note that ACPI uses 0 for INTA) to check for a match.
185 *
186 * Note that the low word of the Address field (function number)
187 * is required by the specification to be 0xffff. We don't risk
188 * checking it here.
189 */
190 if (ACPI_ADR_PCI_SLOT(entry->Address) == pr->pr_slot &&
191 entry->Pin == pr->pr_pin)
192 pr->pr_entry = entry;
193}
194
195/*
196 * Route an interrupt for a child of the bridge.
197 */
198int
199acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
200 ACPI_BUFFER *prtbuf)
201{
202 ACPI_PCI_ROUTING_TABLE *prt;
203 struct prt_lookup_request pr;
204 ACPI_HANDLE lnkdev;
205 int interrupt;
206
207 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
208
209 interrupt = PCI_INVALID_IRQ;
210
211 /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
212 pin--;
213
214 ACPI_SERIAL_BEGIN(pcib);
215
216 /* Search for a matching entry in the routing table. */
217 pr.pr_entry = NULL;
218 pr.pr_pin = pin;
219 pr.pr_slot = pci_get_slot(dev);
220 prt_walk_table(prtbuf, prt_lookup_device, &pr);
221 if (pr.pr_entry == NULL) {
222 device_printf(pcib, "no PRT entry for %d.%d.INT%c", pci_get_bus(dev),
223 pci_get_slot(dev), 'A' + pin);
224 goto out;
225 }
226 prt = pr.pr_entry;
227
228 if (bootverbose) {
229 device_printf(pcib, "matched entry for %d.%d.INT%c",
230 pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
231 if (prt->Source != NULL && prt->Source[0] != '\0')
232 printf(" (src %s:%u)", prt->Source, prt->SourceIndex);
233 printf("\n");
234 }
235
236 /*
237 * If source is empty/NULL, the source index is a global IRQ number
238 * and it's hard-wired so we're done.
239 */
240 if (prt->Source == NULL || prt->Source[0] == '\0') {
241 if (bootverbose)
242 device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
243 pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
244 if (prt->SourceIndex)
245 interrupt = prt->SourceIndex;
246 else
247 device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
248 goto out;
249 }
250
251 /*
252 * We have to find the source device (PCI interrupt link device).
253 */
254 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) {
255 device_printf(pcib, "couldn't find PCI interrupt link device %s\n",
256 prt->Source);
257 goto out;
258 }
259 interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev),
260 prt->SourceIndex);
261
262 if (bootverbose && PCI_INTERRUPT_VALID(interrupt))
263 device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
264 pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev));
265
266out:
267 ACPI_SERIAL_END(pcib);
268
269 return_VALUE (interrupt);
270}
| 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
46ACPI_MODULE_NAME("PCI")
47
48ACPI_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
55struct prt_lookup_request {
56 ACPI_PCI_ROUTING_TABLE *pr_entry;
57 u_int pr_pin;
58 u_int pr_slot;
59};
60
61typedef void prt_entry_handler(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
62
63static void prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
64static void prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
65static void prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler,
66 void *arg);
67
68static void
69prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler, void *arg)
70{
71 ACPI_PCI_ROUTING_TABLE *entry;
72 char *prtptr;
73
74 /* First check to see if there is a table to walk. */
75 if (prt == NULL || prt->Pointer == NULL)
76 return;
77
78 /* Walk the table executing the handler function for each entry. */
79 prtptr = prt->Pointer;
80 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
81 while (entry->Length != 0) {
82 handler(entry, arg);
83 prtptr += entry->Length;
84 entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
85 }
86}
87
88static void
89prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
90{
91 ACPI_HANDLE handle;
92 device_t child, pcib;
93 int error;
94
95 /* We only care about entries that reference a link device. */
96 if (entry->Source == NULL || entry->Source[0] == '\0')
97 return;
98
99 /* Lookup the associated handle and device. */
100 pcib = (device_t)arg;
101 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, entry->Source, &handle)))
102 return;
103 child = acpi_get_device(handle);
104 if (child == NULL)
105 return;
106
107 /* If the device hasn't been probed yet, force it to do so. */
108 error = device_probe_and_attach(child);
109 if (error != 0) {
110 device_printf(pcib, "failed to force attach of %s\n",
111 acpi_name(handle));
112 return;
113 }
114
115 /* Add a reference for a specific bus/device/pin tuple. */
116 acpi_pci_link_add_reference(child, entry->SourceIndex, pcib,
117 ACPI_ADR_PCI_SLOT(entry->Address), entry->Pin);
118}
119
120int
121acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
122{
123 device_t child;
124 ACPI_STATUS status;
125
126 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
127
128 /*
129 * Don't attach if we're not really there.
130 *
131 * XXX: This isn't entirely correct since we may be a PCI bus
132 * on a hot-plug docking station, etc.
133 */
134 if (!acpi_DeviceIsPresent(dev))
135 return_VALUE(ENXIO);
136
137 /*
138 * Get the PCI interrupt routing table for this bus. If we can't
139 * get it, this is not an error but may reduce functionality. There
140 * are several valid bridges in the field that do not have a _PRT, so
141 * only warn about missing tables if bootverbose is set.
142 */
143 prt->Length = ACPI_ALLOCATE_BUFFER;
144 status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
145 if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND))
146 device_printf(dev,
147 "could not get PCI interrupt routing table for %s - %s\n",
148 acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
149
150 /*
151 * Attach the PCI bus proper.
152 */
153 if ((child = device_add_child(dev, "pci", busno)) == NULL) {
154 device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
155 return_VALUE(ENXIO);
156 }
157
158 /*
159 * Now go scan the bus.
160 */
161 prt_walk_table(prt, prt_attach_devices, dev);
162
163 return_VALUE (bus_generic_attach(dev));
164}
165
166int
167acpi_pcib_resume(device_t dev)
168{
169
170 return (bus_generic_resume(dev));
171}
172
173static void
174prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
175{
176 struct prt_lookup_request *pr;
177
178 pr = (struct prt_lookup_request *)arg;
179 if (pr->pr_entry != NULL)
180 return;
181
182 /*
183 * Compare the slot number (high word of Address) and pin number
184 * (note that ACPI uses 0 for INTA) to check for a match.
185 *
186 * Note that the low word of the Address field (function number)
187 * is required by the specification to be 0xffff. We don't risk
188 * checking it here.
189 */
190 if (ACPI_ADR_PCI_SLOT(entry->Address) == pr->pr_slot &&
191 entry->Pin == pr->pr_pin)
192 pr->pr_entry = entry;
193}
194
195/*
196 * Route an interrupt for a child of the bridge.
197 */
198int
199acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
200 ACPI_BUFFER *prtbuf)
201{
202 ACPI_PCI_ROUTING_TABLE *prt;
203 struct prt_lookup_request pr;
204 ACPI_HANDLE lnkdev;
205 int interrupt;
206
207 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
208
209 interrupt = PCI_INVALID_IRQ;
210
211 /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
212 pin--;
213
214 ACPI_SERIAL_BEGIN(pcib);
215
216 /* Search for a matching entry in the routing table. */
217 pr.pr_entry = NULL;
218 pr.pr_pin = pin;
219 pr.pr_slot = pci_get_slot(dev);
220 prt_walk_table(prtbuf, prt_lookup_device, &pr);
221 if (pr.pr_entry == NULL) {
222 device_printf(pcib, "no PRT entry for %d.%d.INT%c", pci_get_bus(dev),
223 pci_get_slot(dev), 'A' + pin);
224 goto out;
225 }
226 prt = pr.pr_entry;
227
228 if (bootverbose) {
229 device_printf(pcib, "matched entry for %d.%d.INT%c",
230 pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
231 if (prt->Source != NULL && prt->Source[0] != '\0')
232 printf(" (src %s:%u)", prt->Source, prt->SourceIndex);
233 printf("\n");
234 }
235
236 /*
237 * If source is empty/NULL, the source index is a global IRQ number
238 * and it's hard-wired so we're done.
239 */
240 if (prt->Source == NULL || prt->Source[0] == '\0') {
241 if (bootverbose)
242 device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
243 pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
244 if (prt->SourceIndex)
245 interrupt = prt->SourceIndex;
246 else
247 device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
248 goto out;
249 }
250
251 /*
252 * We have to find the source device (PCI interrupt link device).
253 */
254 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) {
255 device_printf(pcib, "couldn't find PCI interrupt link device %s\n",
256 prt->Source);
257 goto out;
258 }
259 interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev),
260 prt->SourceIndex);
261
262 if (bootverbose && PCI_INTERRUPT_VALID(interrupt))
263 device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
264 pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev));
265
266out:
267 ACPI_SERIAL_END(pcib);
268
269 return_VALUE (interrupt);
270}
|