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/8.0/sys/dev/acpica/acpi_pcib_acpi.c 195666 2009-07-13 21:36:31Z jkim $");
30
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 #include <sys/sysctl.h>
38
39 #include <contrib/dev/acpica/include/acpi.h>
40 #include <contrib/dev/acpica/include/accommon.h>
41
42 #include <dev/acpica/acpivar.h>
43
44 #include <machine/pci_cfgreg.h>
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pcib_private.h>
47 #include "pcib_if.h"
48
49 #include <dev/acpica/acpi_pcibvar.h>
50
51 /* Hooks for the ACPI CA debugging infrastructure. */
52 #define _COMPONENT ACPI_BUS
53 ACPI_MODULE_NAME("PCI_ACPI")
54
55 struct acpi_hpcib_softc {
56 device_t ap_dev;
57 ACPI_HANDLE ap_handle;
58 int ap_flags;
59
60 int ap_segment; /* analagous to Alpha 'hose' */
61 int ap_bus; /* bios-assigned bus number */
62
63 ACPI_BUFFER ap_prt; /* interrupt routing table */
64 };
65
66 static int acpi_pcib_acpi_probe(device_t bus);
67 static int acpi_pcib_acpi_attach(device_t bus);
68 static int acpi_pcib_acpi_resume(device_t bus);
69 static int acpi_pcib_read_ivar(device_t dev, device_t child,
70 int which, uintptr_t *result);
71 static int acpi_pcib_write_ivar(device_t dev, device_t child,
72 int which, uintptr_t value);
73 static uint32_t acpi_pcib_read_config(device_t dev, u_int bus,
74 u_int slot, u_int func, u_int reg, int bytes);
75 static void acpi_pcib_write_config(device_t dev, u_int bus,
76 u_int slot, u_int func, u_int reg, uint32_t data,
77 int bytes);
78 static int acpi_pcib_acpi_route_interrupt(device_t pcib,
79 device_t dev, int pin);
80 static int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
81 int count, int maxcount, int *irqs);
82 static int acpi_pcib_map_msi(device_t pcib, device_t dev,
83 int irq, uint64_t *addr, uint32_t *data);
84 static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
85 int *irq);
86 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
87 device_t child, int type, int *rid,
88 u_long start, u_long end, u_long count,
89 u_int flags);
90
91 static device_method_t acpi_pcib_acpi_methods[] = {
92 /* Device interface */
93 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
94 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
95 DEVMETHOD(device_shutdown, bus_generic_shutdown),
96 DEVMETHOD(device_suspend, bus_generic_suspend),
97 DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
98
99 /* Bus interface */
100 DEVMETHOD(bus_print_child, bus_generic_print_child),
101 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
102 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
103 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
104 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
105 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
106 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
107 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
108 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
109
110 /* pcib interface */
111 DEVMETHOD(pcib_maxslots, pcib_maxslots),
112 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
113 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
114 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
115 DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
116 DEVMETHOD(pcib_release_msi, pcib_release_msi),
117 DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
118 DEVMETHOD(pcib_release_msix, pcib_release_msix),
119 DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi),
120
121 {0, 0}
122 };
123
124 static devclass_t pcib_devclass;
125
126 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
127 sizeof(struct acpi_hpcib_softc));
128 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
129 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
130
131 static int
132 acpi_pcib_acpi_probe(device_t dev)
133 {
134 static char *pcib_ids[] = { "PNP0A03", "PNP0A08", NULL };
135
136 if (acpi_disabled("pcib") ||
137 ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
138 return (ENXIO);
139
140 if (pci_cfgregopen() == 0)
141 return (ENXIO);
142 device_set_desc(dev, "ACPI Host-PCI bridge");
143 return (0);
144 }
145
146 static int
147 acpi_pcib_acpi_attach(device_t dev)
148 {
149 struct acpi_hpcib_softc *sc;
150 ACPI_STATUS status;
151 static int bus0_seen = 0;
152 u_int addr, slot, func, busok;
153 uint8_t busno;
154
155 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
156
157 sc = device_get_softc(dev);
158 sc->ap_dev = dev;
159 sc->ap_handle = acpi_get_handle(dev);
160
161 /*
162 * Get our segment number by evaluating _SEG
163 * It's OK for this to not exist.
164 */
165 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
166 if (ACPI_FAILURE(status)) {
167 if (status != AE_NOT_FOUND) {
168 device_printf(dev, "could not evaluate _SEG - %s\n",
169 AcpiFormatException(status));
170 return_VALUE (ENXIO);
171 }
172 /* If it's not found, assume 0. */
173 sc->ap_segment = 0;
174 }
175
176 /*
177 * Get our base bus number by evaluating _BBN.
178 * If this doesn't work, we assume we're bus number 0.
179 *
180 * XXX note that it may also not exist in the case where we are
181 * meant to use a private configuration space mechanism for this bus,
182 * so we should dig out our resources and check to see if we have
183 * anything like that. How do we do this?
184 * XXX If we have the requisite information, and if we don't think the
185 * default PCI configuration space handlers can deal with this bus,
186 * we should attach our own handler.
187 * XXX invoke _REG on this for the PCI config space address space?
188 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
189 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
190 * if _BBN is zero and PCI bus 0 already exists, we try to read our
191 * bus number from the configuration registers at address _ADR.
192 * We only do this for domain/segment 0 in the hopes that this is
193 * only needed for old single-domain machines.
194 */
195 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
196 if (ACPI_FAILURE(status)) {
197 if (status != AE_NOT_FOUND) {
198 device_printf(dev, "could not evaluate _BBN - %s\n",
199 AcpiFormatException(status));
200 return_VALUE (ENXIO);
201 } else {
202 /* If it's not found, assume 0. */
203 sc->ap_bus = 0;
204 }
205 }
206
207 /*
208 * If this is segment 0, the bus is zero, and PCI bus 0 already
209 * exists, read the bus number via PCI config space.
210 */
211 busok = 1;
212 if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
213 busok = 0;
214 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
215 if (ACPI_FAILURE(status)) {
216 if (status != AE_NOT_FOUND) {
217 device_printf(dev, "could not evaluate _ADR - %s\n",
218 AcpiFormatException(status));
219 return_VALUE (ENXIO);
220 } else
221 device_printf(dev, "couldn't find _ADR\n");
222 } else {
223 /* XXX: We assume bus 0. */
224 slot = ACPI_ADR_PCI_SLOT(addr);
225 func = ACPI_ADR_PCI_FUNC(addr);
226 if (bootverbose)
227 device_printf(dev, "reading config registers from 0:%d:%d\n",
228 slot, func);
229 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
230 device_printf(dev, "couldn't read bus number from cfg space\n");
231 else {
232 sc->ap_bus = busno;
233 busok = 1;
234 }
235 }
236 }
237
238 /*
239 * If nothing else worked, hope that ACPI at least lays out the
240 * host-PCI bridges in order and that as a result our unit number
241 * is actually our bus number. There are several reasons this
242 * might not be true.
243 */
244 if (busok == 0) {
245 sc->ap_bus = device_get_unit(dev);
246 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
247 }
248
249 /* If this is bus 0 on segment 0, note that it has been seen already. */
250 if (sc->ap_segment == 0 && sc->ap_bus == 0)
251 bus0_seen = 1;
252
253 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
254 }
255
256 static int
257 acpi_pcib_acpi_resume(device_t dev)
258 {
259
260 return (acpi_pcib_resume(dev));
261 }
262
263 /*
264 * Support for standard PCI bridge ivars.
265 */
266 static int
267 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
268 {
269 struct acpi_hpcib_softc *sc = device_get_softc(dev);
270
271 switch (which) {
272 case PCIB_IVAR_DOMAIN:
273 *result = 0;
274 return (0);
275 case PCIB_IVAR_BUS:
276 *result = sc->ap_bus;
277 return (0);
278 case ACPI_IVAR_HANDLE:
279 *result = (uintptr_t)sc->ap_handle;
280 return (0);
281 case ACPI_IVAR_FLAGS:
282 *result = (uintptr_t)sc->ap_flags;
283 return (0);
284 }
285 return (ENOENT);
286 }
287
288 static int
289 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
290 {
291 struct acpi_hpcib_softc *sc = device_get_softc(dev);
292
293 switch (which) {
294 case PCIB_IVAR_DOMAIN:
295 return (EINVAL);
296 case PCIB_IVAR_BUS:
297 sc->ap_bus = value;
298 return (0);
299 case ACPI_IVAR_HANDLE:
300 sc->ap_handle = (ACPI_HANDLE)value;
301 return (0);
302 case ACPI_IVAR_FLAGS:
303 sc->ap_flags = (int)value;
304 return (0);
305 }
306 return (ENOENT);
307 }
308
309 static uint32_t
310 acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
311 u_int reg, int bytes)
312 {
313 return (pci_cfgregread(bus, slot, func, reg, bytes));
314 }
315
316 static void
317 acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
318 u_int reg, uint32_t data, int bytes)
319 {
320 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
321 }
322
323 static int
324 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
325 {
326 struct acpi_hpcib_softc *sc = device_get_softc(pcib);
327
328 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
329 }
330
331 static int
332 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
333 int *irqs)
334 {
335 device_t bus;
336
337 bus = device_get_parent(pcib);
338 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
339 irqs));
340 }
341
342 static int
343 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
344 {
345 device_t bus;
346
347 bus = device_get_parent(pcib);
348 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
349 }
350
351 static int
352 acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
353 uint32_t *data)
354 {
355 device_t bus;
356
357 bus = device_get_parent(pcib);
358 return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
359 }
360
361 static u_long acpi_host_mem_start = 0x80000000;
362 TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
363
364 struct resource *
365 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
366 u_long start, u_long end, u_long count, u_int flags)
367 {
368 /*
369 * If no memory preference is given, use upper 32MB slot most
370 * bioses use for their memory window. Typically other bridges
371 * before us get in the way to assert their preferences on memory.
372 * Hardcoding like this sucks, so a more MD/MI way needs to be
373 * found to do it. This is typically only used on older laptops
374 * that don't have pci busses behind pci bridge, so assuming > 32MB
375 * is liekly OK.
376 */
377 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
378 start = acpi_host_mem_start;
379 if (type == SYS_RES_IOPORT && start == 0UL && end == ~0UL)
380 start = 0x1000;
381 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
382 count, flags));
383 }
Cache object: 1f26774571a4b29329f285d0ebdee045
|