40#include <dev/acpica/acpivar.h>
41
42#include <machine/pci_cfgreg.h>
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcib_private.h>
45#include "pcib_if.h"
46
47#include <dev/acpica/acpi_pcibvar.h>
48
49/* Hooks for the ACPI CA debugging infrastructure. */
50#define _COMPONENT ACPI_BUS
51ACPI_MODULE_NAME("PCI_ACPI")
52
53struct acpi_hpcib_softc {
54 device_t ap_dev;
55 ACPI_HANDLE ap_handle;
56 int ap_flags;
57
58 int ap_segment; /* analagous to Alpha 'hose' */
59 int ap_bus; /* bios-assigned bus number */
60
61 ACPI_BUFFER ap_prt; /* interrupt routing table */
62};
63
64static int acpi_pcib_acpi_probe(device_t bus);
65static int acpi_pcib_acpi_attach(device_t bus);
66static int acpi_pcib_acpi_resume(device_t bus);
67static int acpi_pcib_read_ivar(device_t dev, device_t child,
68 int which, uintptr_t *result);
69static int acpi_pcib_write_ivar(device_t dev, device_t child,
70 int which, uintptr_t value);
71static uint32_t acpi_pcib_read_config(device_t dev, int bus, int slot,
72 int func, int reg, int bytes);
73static void acpi_pcib_write_config(device_t dev, int bus, int slot,
74 int func, int reg, uint32_t data, int bytes);
75static int acpi_pcib_acpi_route_interrupt(device_t pcib,
76 device_t dev, int pin);
77static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
78 device_t child, int type, int *rid,
79 u_long start, u_long end, u_long count,
80 u_int flags);
81
82static device_method_t acpi_pcib_acpi_methods[] = {
83 /* Device interface */
84 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
85 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
86 DEVMETHOD(device_shutdown, bus_generic_shutdown),
87 DEVMETHOD(device_suspend, bus_generic_suspend),
88 DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
89
90 /* Bus interface */
91 DEVMETHOD(bus_print_child, bus_generic_print_child),
92 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
93 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
94 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
95 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
96 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
97 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
98 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
99 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
100
101 /* pcib interface */
102 DEVMETHOD(pcib_maxslots, pcib_maxslots),
103 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
104 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
105 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
106
107 {0, 0}
108};
109
110static driver_t acpi_pcib_acpi_driver = {
111 "pcib",
112 acpi_pcib_acpi_methods,
113 sizeof(struct acpi_hpcib_softc),
114};
115
116DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
117MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
118
119static int
120acpi_pcib_acpi_probe(device_t dev)
121{
122 static char *pcib_ids[] = { "PNP0A03", NULL };
123
124 if (acpi_disabled("pcib") ||
125 ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
126 return (ENXIO);
127
128 if (pci_cfgregopen() == 0)
129 return (ENXIO);
130 device_set_desc(dev, "ACPI Host-PCI bridge");
131 return (0);
132}
133
134static int
135acpi_pcib_acpi_attach(device_t dev)
136{
137 struct acpi_hpcib_softc *sc;
138 ACPI_STATUS status;
139 u_int addr, slot, func, busok;
140 uint8_t busno;
141
142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
143
144 sc = device_get_softc(dev);
145 sc->ap_dev = dev;
146 sc->ap_handle = acpi_get_handle(dev);
147
148 /*
149 * Get our base bus number by evaluating _BBN.
150 * If this doesn't work, we assume we're bus number 0.
151 *
152 * XXX note that it may also not exist in the case where we are
153 * meant to use a private configuration space mechanism for this bus,
154 * so we should dig out our resources and check to see if we have
155 * anything like that. How do we do this?
156 * XXX If we have the requisite information, and if we don't think the
157 * default PCI configuration space handlers can deal with this bus,
158 * we should attach our own handler.
159 * XXX invoke _REG on this for the PCI config space address space?
160 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
161 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
162 * if _BBN is zero and pcib0 already exists, we try to read our
163 * bus number from the configuration registers at address _ADR.
164 */
165 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
166 if (ACPI_FAILURE(status)) {
167 if (status != AE_NOT_FOUND) {
168 device_printf(dev, "could not evaluate _BBN - %s\n",
169 AcpiFormatException(status));
170 return_VALUE (ENXIO);
171 } else {
172 /* If it's not found, assume 0. */
173 sc->ap_bus = 0;
174 }
175 }
176
177 /*
178 * If the bus is zero and pcib0 already exists, read the bus number
179 * via PCI config space.
180 */
181 busok = 1;
182 if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
183 busok = 0;
184 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
185 if (ACPI_FAILURE(status)) {
186 if (status != AE_NOT_FOUND) {
187 device_printf(dev, "could not evaluate _ADR - %s\n",
188 AcpiFormatException(status));
189 return_VALUE (ENXIO);
190 } else
191 device_printf(dev, "couldn't find _ADR\n");
192 } else {
193 /* XXX: We assume bus 0. */
194 slot = ACPI_ADR_PCI_SLOT(addr);
195 func = ACPI_ADR_PCI_FUNC(addr);
196 if (bootverbose)
197 device_printf(dev, "reading config registers from 0:%d:%d\n",
198 slot, func);
199 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
200 device_printf(dev, "couldn't read bus number from cfg space\n");
201 else {
202 sc->ap_bus = busno;
203 busok = 1;
204 }
205 }
206 }
207
208 /*
209 * If nothing else worked, hope that ACPI at least lays out the
210 * host-PCI bridges in order and that as a result our unit number
211 * is actually our bus number. There are several reasons this
212 * might not be true.
213 */
214 if (busok == 0) {
215 sc->ap_bus = device_get_unit(dev);
216 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
217 }
218
219 /*
220 * Get our segment number by evaluating _SEG
221 * It's OK for this to not exist.
222 */
223 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
224 if (ACPI_FAILURE(status)) {
225 if (status != AE_NOT_FOUND) {
226 device_printf(dev, "could not evaluate _SEG - %s\n",
227 AcpiFormatException(status));
228 return_VALUE (ENXIO);
229 }
230 /* If it's not found, assume 0. */
231 sc->ap_segment = 0;
232 }
233
234 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
235}
236
237static int
238acpi_pcib_acpi_resume(device_t dev)
239{
240
241 return (acpi_pcib_resume(dev));
242}
243
244/*
245 * Support for standard PCI bridge ivars.
246 */
247static int
248acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
249{
250 struct acpi_hpcib_softc *sc = device_get_softc(dev);
251
252 switch (which) {
253 case PCIB_IVAR_BUS:
254 *result = sc->ap_bus;
255 return (0);
256 case ACPI_IVAR_HANDLE:
257 *result = (uintptr_t)sc->ap_handle;
258 return (0);
259 case ACPI_IVAR_FLAGS:
260 *result = (uintptr_t)sc->ap_flags;
261 return (0);
262 }
263 return (ENOENT);
264}
265
266static int
267acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
268{
269 struct acpi_hpcib_softc *sc = device_get_softc(dev);
270
271 switch (which) {
272 case PCIB_IVAR_BUS:
273 sc->ap_bus = value;
274 return (0);
275 case ACPI_IVAR_HANDLE:
276 sc->ap_handle = (ACPI_HANDLE)value;
277 return (0);
278 case ACPI_IVAR_FLAGS:
279 sc->ap_flags = (int)value;
280 return (0);
281 }
282 return (ENOENT);
283}
284
285static uint32_t
286acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg,
287 int bytes)
288{
289 return (pci_cfgregread(bus, slot, func, reg, bytes));
290}
291
292static void
293acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
294 uint32_t data, int bytes)
295{
296 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
297}
298
299static int
300acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
301{
302 struct acpi_hpcib_softc *sc = device_get_softc(pcib);
303
304 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
305}
306
307static u_long acpi_host_mem_start = 0x80000000;
308TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
309
310struct resource *
311acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
312 u_long start, u_long end, u_long count, u_int flags)
313{
314 /*
315 * If no memory preference is given, use upper 32MB slot most
316 * bioses use for their memory window. Typically other bridges
317 * before us get in the way to assert their preferences on memory.
318 * Hardcoding like this sucks, so a more MD/MI way needs to be
319 * found to do it. This is typically only used on older laptops
320 * that don't have pci busses behind pci bridge, so assuming > 32MB
321 * is liekly OK.
322 */
323 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
324 start = acpi_host_mem_start;
325 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
326 count, flags));
327}
| 40#include <dev/acpica/acpivar.h>
41
42#include <machine/pci_cfgreg.h>
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcib_private.h>
45#include "pcib_if.h"
46
47#include <dev/acpica/acpi_pcibvar.h>
48
49/* Hooks for the ACPI CA debugging infrastructure. */
50#define _COMPONENT ACPI_BUS
51ACPI_MODULE_NAME("PCI_ACPI")
52
53struct acpi_hpcib_softc {
54 device_t ap_dev;
55 ACPI_HANDLE ap_handle;
56 int ap_flags;
57
58 int ap_segment; /* analagous to Alpha 'hose' */
59 int ap_bus; /* bios-assigned bus number */
60
61 ACPI_BUFFER ap_prt; /* interrupt routing table */
62};
63
64static int acpi_pcib_acpi_probe(device_t bus);
65static int acpi_pcib_acpi_attach(device_t bus);
66static int acpi_pcib_acpi_resume(device_t bus);
67static int acpi_pcib_read_ivar(device_t dev, device_t child,
68 int which, uintptr_t *result);
69static int acpi_pcib_write_ivar(device_t dev, device_t child,
70 int which, uintptr_t value);
71static uint32_t acpi_pcib_read_config(device_t dev, int bus, int slot,
72 int func, int reg, int bytes);
73static void acpi_pcib_write_config(device_t dev, int bus, int slot,
74 int func, int reg, uint32_t data, int bytes);
75static int acpi_pcib_acpi_route_interrupt(device_t pcib,
76 device_t dev, int pin);
77static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
78 device_t child, int type, int *rid,
79 u_long start, u_long end, u_long count,
80 u_int flags);
81
82static device_method_t acpi_pcib_acpi_methods[] = {
83 /* Device interface */
84 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
85 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
86 DEVMETHOD(device_shutdown, bus_generic_shutdown),
87 DEVMETHOD(device_suspend, bus_generic_suspend),
88 DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
89
90 /* Bus interface */
91 DEVMETHOD(bus_print_child, bus_generic_print_child),
92 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
93 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
94 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
95 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
96 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
97 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
98 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
99 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
100
101 /* pcib interface */
102 DEVMETHOD(pcib_maxslots, pcib_maxslots),
103 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
104 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
105 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
106
107 {0, 0}
108};
109
110static driver_t acpi_pcib_acpi_driver = {
111 "pcib",
112 acpi_pcib_acpi_methods,
113 sizeof(struct acpi_hpcib_softc),
114};
115
116DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
117MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
118
119static int
120acpi_pcib_acpi_probe(device_t dev)
121{
122 static char *pcib_ids[] = { "PNP0A03", NULL };
123
124 if (acpi_disabled("pcib") ||
125 ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
126 return (ENXIO);
127
128 if (pci_cfgregopen() == 0)
129 return (ENXIO);
130 device_set_desc(dev, "ACPI Host-PCI bridge");
131 return (0);
132}
133
134static int
135acpi_pcib_acpi_attach(device_t dev)
136{
137 struct acpi_hpcib_softc *sc;
138 ACPI_STATUS status;
139 u_int addr, slot, func, busok;
140 uint8_t busno;
141
142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
143
144 sc = device_get_softc(dev);
145 sc->ap_dev = dev;
146 sc->ap_handle = acpi_get_handle(dev);
147
148 /*
149 * Get our base bus number by evaluating _BBN.
150 * If this doesn't work, we assume we're bus number 0.
151 *
152 * XXX note that it may also not exist in the case where we are
153 * meant to use a private configuration space mechanism for this bus,
154 * so we should dig out our resources and check to see if we have
155 * anything like that. How do we do this?
156 * XXX If we have the requisite information, and if we don't think the
157 * default PCI configuration space handlers can deal with this bus,
158 * we should attach our own handler.
159 * XXX invoke _REG on this for the PCI config space address space?
160 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
161 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
162 * if _BBN is zero and pcib0 already exists, we try to read our
163 * bus number from the configuration registers at address _ADR.
164 */
165 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
166 if (ACPI_FAILURE(status)) {
167 if (status != AE_NOT_FOUND) {
168 device_printf(dev, "could not evaluate _BBN - %s\n",
169 AcpiFormatException(status));
170 return_VALUE (ENXIO);
171 } else {
172 /* If it's not found, assume 0. */
173 sc->ap_bus = 0;
174 }
175 }
176
177 /*
178 * If the bus is zero and pcib0 already exists, read the bus number
179 * via PCI config space.
180 */
181 busok = 1;
182 if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
183 busok = 0;
184 status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
185 if (ACPI_FAILURE(status)) {
186 if (status != AE_NOT_FOUND) {
187 device_printf(dev, "could not evaluate _ADR - %s\n",
188 AcpiFormatException(status));
189 return_VALUE (ENXIO);
190 } else
191 device_printf(dev, "couldn't find _ADR\n");
192 } else {
193 /* XXX: We assume bus 0. */
194 slot = ACPI_ADR_PCI_SLOT(addr);
195 func = ACPI_ADR_PCI_FUNC(addr);
196 if (bootverbose)
197 device_printf(dev, "reading config registers from 0:%d:%d\n",
198 slot, func);
199 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
200 device_printf(dev, "couldn't read bus number from cfg space\n");
201 else {
202 sc->ap_bus = busno;
203 busok = 1;
204 }
205 }
206 }
207
208 /*
209 * If nothing else worked, hope that ACPI at least lays out the
210 * host-PCI bridges in order and that as a result our unit number
211 * is actually our bus number. There are several reasons this
212 * might not be true.
213 */
214 if (busok == 0) {
215 sc->ap_bus = device_get_unit(dev);
216 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
217 }
218
219 /*
220 * Get our segment number by evaluating _SEG
221 * It's OK for this to not exist.
222 */
223 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
224 if (ACPI_FAILURE(status)) {
225 if (status != AE_NOT_FOUND) {
226 device_printf(dev, "could not evaluate _SEG - %s\n",
227 AcpiFormatException(status));
228 return_VALUE (ENXIO);
229 }
230 /* If it's not found, assume 0. */
231 sc->ap_segment = 0;
232 }
233
234 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
235}
236
237static int
238acpi_pcib_acpi_resume(device_t dev)
239{
240
241 return (acpi_pcib_resume(dev));
242}
243
244/*
245 * Support for standard PCI bridge ivars.
246 */
247static int
248acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
249{
250 struct acpi_hpcib_softc *sc = device_get_softc(dev);
251
252 switch (which) {
253 case PCIB_IVAR_BUS:
254 *result = sc->ap_bus;
255 return (0);
256 case ACPI_IVAR_HANDLE:
257 *result = (uintptr_t)sc->ap_handle;
258 return (0);
259 case ACPI_IVAR_FLAGS:
260 *result = (uintptr_t)sc->ap_flags;
261 return (0);
262 }
263 return (ENOENT);
264}
265
266static int
267acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
268{
269 struct acpi_hpcib_softc *sc = device_get_softc(dev);
270
271 switch (which) {
272 case PCIB_IVAR_BUS:
273 sc->ap_bus = value;
274 return (0);
275 case ACPI_IVAR_HANDLE:
276 sc->ap_handle = (ACPI_HANDLE)value;
277 return (0);
278 case ACPI_IVAR_FLAGS:
279 sc->ap_flags = (int)value;
280 return (0);
281 }
282 return (ENOENT);
283}
284
285static uint32_t
286acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg,
287 int bytes)
288{
289 return (pci_cfgregread(bus, slot, func, reg, bytes));
290}
291
292static void
293acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
294 uint32_t data, int bytes)
295{
296 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
297}
298
299static int
300acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
301{
302 struct acpi_hpcib_softc *sc = device_get_softc(pcib);
303
304 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
305}
306
307static u_long acpi_host_mem_start = 0x80000000;
308TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
309
310struct resource *
311acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
312 u_long start, u_long end, u_long count, u_int flags)
313{
314 /*
315 * If no memory preference is given, use upper 32MB slot most
316 * bioses use for their memory window. Typically other bridges
317 * before us get in the way to assert their preferences on memory.
318 * Hardcoding like this sucks, so a more MD/MI way needs to be
319 * found to do it. This is typically only used on older laptops
320 * that don't have pci busses behind pci bridge, so assuming > 32MB
321 * is liekly OK.
322 */
323 if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
324 start = acpi_host_mem_start;
325 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
326 count, flags));
327}
|