1 | /* $NetBSD: acpi_mcfg.c,v 1.4 2016/07/12 09:45:34 hannken Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (C) 2015 NONAKA Kimihiro <nonaka@NetBSD.org> |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | */ |
27 | |
28 | #include <sys/cdefs.h> |
29 | __KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.4 2016/07/12 09:45:34 hannken Exp $" ); |
30 | |
31 | #include <sys/param.h> |
32 | #include <sys/device.h> |
33 | #include <sys/kmem.h> |
34 | #include <sys/systm.h> |
35 | |
36 | #include <dev/pci/pcireg.h> |
37 | #include <dev/pci/pcivar.h> |
38 | #include <dev/pci/pcidevs.h> |
39 | |
40 | #include <dev/acpi/acpireg.h> |
41 | #include <dev/acpi/acpivar.h> |
42 | #include <dev/acpi/acpi_mcfg.h> |
43 | |
44 | #include "locators.h" |
45 | |
46 | #define _COMPONENT ACPI_RESOURCE_COMPONENT |
47 | ACPI_MODULE_NAME ("acpi_mcfg" ) |
48 | |
49 | #define EXTCONF_OFFSET(d, f, r) ((((d) * 8 + (f)) * PCI_EXTCONF_SIZE) + (r)) |
50 | |
51 | #define EXTCONF_SET_VALID(mb, d, f) ((mb)->valid_devs[(d)] |= __BIT((f))) |
52 | #define EXTCONF_SET_INVALID(mb, d, f) ((mb)->valid_devs[(d)] &= ~__BIT((f))) |
53 | #define EXTCONF_IS_VALID(mb, d, f) ((mb)->valid_devs[(d)] & __BIT((f))) |
54 | |
55 | struct mcfg_segment { |
56 | uint64_t ms_address; /* Base address */ |
57 | int ms_segment; /* Segment # */ |
58 | int ms_bus_start; /* Start bus # */ |
59 | int ms_bus_end; /* End bus # */ |
60 | bus_space_tag_t ms_bst; |
61 | struct mcfg_bus { |
62 | bus_space_handle_t bsh[32][8]; |
63 | uint8_t valid_devs[32]; |
64 | int valid_ndevs; |
65 | pcitag_t last_probed; |
66 | } *ms_bus; |
67 | }; |
68 | |
69 | static struct mcfg_segment *mcfg_segs; |
70 | static int mcfg_nsegs; |
71 | static ACPI_TABLE_MCFG *mcfg; |
72 | static int mcfg_inited; |
73 | static struct acpi_softc *acpi_sc; |
74 | |
75 | static const struct acpimcfg_ops mcfg_default_ops = { |
76 | .ao_validate = acpimcfg_default_validate, |
77 | |
78 | .ao_read = acpimcfg_default_read, |
79 | .ao_write = acpimcfg_default_write, |
80 | }; |
81 | static const struct acpimcfg_ops *mcfg_ops = &mcfg_default_ops; |
82 | |
83 | /* |
84 | * default operations. |
85 | */ |
86 | bool |
87 | acpimcfg_default_validate(uint64_t address, int bus_start, int *bus_end) |
88 | { |
89 | |
90 | /* Always Ok */ |
91 | return true; |
92 | } |
93 | |
94 | uint32_t |
95 | acpimcfg_default_read(bus_space_tag_t bst, bus_space_handle_t bsh, |
96 | bus_addr_t addr) |
97 | { |
98 | |
99 | return bus_space_read_4(bst, bsh, addr); |
100 | } |
101 | |
102 | void |
103 | acpimcfg_default_write(bus_space_tag_t bst, bus_space_handle_t bsh, |
104 | bus_addr_t addr, uint32_t data) |
105 | { |
106 | |
107 | bus_space_write_4(bst, bsh, addr, data); |
108 | } |
109 | |
110 | |
111 | /* |
112 | * Check MCFG memory region at system resource |
113 | */ |
114 | struct acpimcfg_memrange { |
115 | const char *hid; |
116 | uint64_t address; |
117 | int bus_start; |
118 | int bus_end; |
119 | bool found; |
120 | }; |
121 | |
122 | static ACPI_STATUS |
123 | acpimcfg_parse_callback(ACPI_RESOURCE *res, void *ctx) |
124 | { |
125 | struct acpimcfg_memrange *mr = ctx; |
126 | const char *type; |
127 | uint64_t size, mapaddr, mapsize; |
128 | int n; |
129 | |
130 | switch (res->Type) { |
131 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: |
132 | type = "FIXED_MEMORY32" ; |
133 | mapaddr = res->Data.FixedMemory32.Address; |
134 | mapsize = res->Data.FixedMemory32.AddressLength; |
135 | break; |
136 | |
137 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
138 | /* XXX Only fixed size supported for now */ |
139 | if (res->Data.Address32.Address.AddressLength == 0 || |
140 | res->Data.Address32.ProducerConsumer != ACPI_CONSUMER) |
141 | goto out; |
142 | |
143 | if (res->Data.Address32.ResourceType != ACPI_MEMORY_RANGE) |
144 | goto out; |
145 | |
146 | if (res->Data.Address32.MinAddressFixed != ACPI_ADDRESS_FIXED || |
147 | res->Data.Address32.MaxAddressFixed != ACPI_ADDRESS_FIXED) |
148 | goto out; |
149 | |
150 | type = "ADDRESS32" ; |
151 | mapaddr = res->Data.Address32.Address.Minimum; |
152 | mapsize = res->Data.Address32.Address.AddressLength; |
153 | break; |
154 | |
155 | #ifdef _LP64 |
156 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
157 | /* XXX Only fixed size supported for now */ |
158 | if (res->Data.Address64.Address.AddressLength == 0 || |
159 | res->Data.Address64.ProducerConsumer != ACPI_CONSUMER) |
160 | goto out; |
161 | |
162 | if (res->Data.Address64.ResourceType != ACPI_MEMORY_RANGE) |
163 | goto out; |
164 | |
165 | if (res->Data.Address64.MinAddressFixed != ACPI_ADDRESS_FIXED || |
166 | res->Data.Address64.MaxAddressFixed != ACPI_ADDRESS_FIXED) |
167 | goto out; |
168 | |
169 | type = "ADDRESS64" ; |
170 | mapaddr = res->Data.Address64.Address.Minimum; |
171 | mapsize = res->Data.Address64.Address.AddressLength; |
172 | break; |
173 | #endif |
174 | |
175 | default: |
176 | out: |
177 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d\n" , |
178 | mr->hid, res->Type); |
179 | return_ACPI_STATUS(AE_OK); |
180 | } |
181 | |
182 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: Type=%d(%s), " |
183 | "Address=0x%016" PRIx64 ", Length=0x%016" PRIx64 "\n" , |
184 | mr->hid, res->Type, type, mapaddr, mapsize); |
185 | |
186 | if (mr->address < mapaddr || mr->address >= mapaddr + mapsize) |
187 | return_ACPI_STATUS(AE_OK); |
188 | |
189 | size = (mr->bus_end - mr->bus_start + 1) * ACPIMCFG_SIZE_PER_BUS; |
190 | |
191 | /* full map */ |
192 | if (mr->address + size <= mapaddr + mapsize) { |
193 | mr->found = true; |
194 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
195 | } |
196 | |
197 | /* partial map */ |
198 | n = (mapsize - (mr->address - mapaddr)) / ACPIMCFG_SIZE_PER_BUS; |
199 | /* bus_start == bus_end is not allowed. */ |
200 | if (n > 1) { |
201 | mr->bus_end = mr->bus_start + n - 1; |
202 | mr->found = true; |
203 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
204 | } |
205 | |
206 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d-%d, " |
207 | "address 0x%016" PRIx64 ": invalid size: request 0x%016" PRIx64 |
208 | ", actual 0x%016" PRIx64 "\n" , |
209 | mr->bus_start, mr->bus_end, mr->address, size, mapsize); |
210 | |
211 | return_ACPI_STATUS(AE_OK); |
212 | } |
213 | |
214 | static ACPI_STATUS |
215 | acpimcfg_check_system_resource(ACPI_HANDLE handle, UINT32 level, void *ctx, |
216 | void **retval) |
217 | { |
218 | struct acpimcfg_memrange *mr = ctx; |
219 | ACPI_STATUS status; |
220 | |
221 | status = AcpiWalkResources(handle, "_CRS" , acpimcfg_parse_callback, mr); |
222 | if (ACPI_FAILURE(status)) |
223 | return_ACPI_STATUS(status); |
224 | |
225 | if (mr->found) |
226 | return_ACPI_STATUS(AE_CTRL_TERMINATE); |
227 | |
228 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: %s: bus %d-%d, " |
229 | "address 0x%016" PRIx64 ": no valid region\n" , mr->hid, |
230 | mr->bus_start, mr->bus_end, mr->address); |
231 | |
232 | return_ACPI_STATUS(AE_OK); |
233 | } |
234 | |
235 | static bool |
236 | acpimcfg_find_system_resource(uint64_t address, int bus_start, int *bus_end) |
237 | { |
238 | static const char *system_resource_hid[] = { |
239 | "PNP0C01" , /* System Board */ |
240 | "PNP0C02" /* General ID for reserving resources */ |
241 | }; |
242 | struct acpimcfg_memrange mr; |
243 | ACPI_STATUS status; |
244 | int i; |
245 | |
246 | mr.address = address; |
247 | mr.bus_start = bus_start; |
248 | mr.bus_end = *bus_end; |
249 | mr.found = false; |
250 | |
251 | for (i = 0; i < __arraycount(system_resource_hid); i++) { |
252 | mr.hid = system_resource_hid[i]; |
253 | status = AcpiGetDevices(__UNCONST(system_resource_hid[i]), |
254 | acpimcfg_check_system_resource, &mr, NULL); |
255 | if (ACPI_FAILURE(status)) |
256 | continue; |
257 | if (mr.found) { |
258 | *bus_end = mr.bus_end; |
259 | return true; |
260 | } |
261 | } |
262 | return false; |
263 | } |
264 | |
265 | |
266 | /* |
267 | * ACPI MCFG |
268 | */ |
269 | void |
270 | acpimcfg_probe(struct acpi_softc *sc) |
271 | { |
272 | ACPI_MCFG_ALLOCATION *ama; |
273 | ACPI_STATUS status; |
274 | uint32_t offset; |
275 | int i, nsegs; |
276 | |
277 | if (acpi_sc != NULL) |
278 | panic("acpi_sc != NULL" ); |
279 | acpi_sc = sc; |
280 | |
281 | status = AcpiGetTable(ACPI_SIG_MCFG, 0, (ACPI_TABLE_HEADER **)&mcfg); |
282 | if (ACPI_FAILURE(status)) { |
283 | mcfg = NULL; |
284 | return; |
285 | } |
286 | |
287 | nsegs = 0; |
288 | offset = sizeof(ACPI_TABLE_MCFG); |
289 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); |
290 | for (i = 0; offset < mcfg->Header.Length; i++) { |
291 | aprint_debug_dev(sc->sc_dev, |
292 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n" , |
293 | ama->PciSegment, ama->StartBusNumber, ama->EndBusNumber, |
294 | ama->Address); |
295 | nsegs++; |
296 | offset += sizeof(ACPI_MCFG_ALLOCATION); |
297 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, ama, offset); |
298 | } |
299 | if (nsegs == 0) { |
300 | mcfg = NULL; |
301 | return; |
302 | } |
303 | |
304 | mcfg_segs = kmem_zalloc(sizeof(*mcfg_segs) * nsegs, KM_SLEEP); |
305 | mcfg_nsegs = nsegs; |
306 | } |
307 | |
308 | int |
309 | acpimcfg_init(bus_space_tag_t memt, const struct acpimcfg_ops *ops) |
310 | { |
311 | ACPI_MCFG_ALLOCATION *ama; |
312 | struct mcfg_segment *seg; |
313 | uint32_t offset; |
314 | int i, n, nsegs, bus_end; |
315 | |
316 | if (mcfg == NULL) |
317 | return ENXIO; |
318 | |
319 | if (mcfg_inited) |
320 | return 0; |
321 | |
322 | if (ops != NULL) |
323 | mcfg_ops = ops; |
324 | |
325 | nsegs = 0; |
326 | offset = sizeof(ACPI_TABLE_MCFG); |
327 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, mcfg, offset); |
328 | for (i = 0; offset < mcfg->Header.Length; i++) { |
329 | #ifndef _LP64 |
330 | if (ama->Address >= 0x100000000ULL) { |
331 | aprint_debug_dev(acpi_sc->sc_dev, |
332 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
333 | ": ignore (64bit address)\n" , ama->PciSegment, |
334 | ama->StartBusNumber, ama->EndBusNumber, |
335 | ama->Address); |
336 | goto next; |
337 | } |
338 | #endif |
339 | /* |
340 | * Some (broken?) BIOSen have an MCFG table for an empty |
341 | * bus range. Ignore those tables. |
342 | */ |
343 | if (ama->StartBusNumber == ama->EndBusNumber) { |
344 | aprint_debug_dev(acpi_sc->sc_dev, |
345 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
346 | ": ignore (bus %d == %d)\n" , ama->PciSegment, |
347 | ama->StartBusNumber, ama->EndBusNumber, |
348 | ama->Address, ama->StartBusNumber, |
349 | ama->EndBusNumber); |
350 | goto next; |
351 | } |
352 | if (ama->StartBusNumber > ama->EndBusNumber) { |
353 | aprint_debug_dev(acpi_sc->sc_dev, |
354 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
355 | ": ignore (bus %d > %d)\n" , ama->PciSegment, |
356 | ama->StartBusNumber, ama->EndBusNumber, |
357 | ama->Address, ama->StartBusNumber, |
358 | ama->EndBusNumber); |
359 | goto next; |
360 | } |
361 | |
362 | /* Validate MCFG memory range */ |
363 | bus_end = ama->EndBusNumber; |
364 | if (mcfg_ops->ao_validate != NULL && |
365 | !mcfg_ops->ao_validate(ama->Address, ama->StartBusNumber, |
366 | &bus_end)) { |
367 | if (!acpimcfg_find_system_resource( ama->Address, |
368 | ama->StartBusNumber, &bus_end)) { |
369 | aprint_debug_dev(acpi_sc->sc_dev, |
370 | "MCFG: segment %d, bus %d-%d, " |
371 | "address 0x%016" PRIx64 |
372 | ": ignore (invalid address)\n" , |
373 | ama->PciSegment, |
374 | ama->StartBusNumber, ama->EndBusNumber, |
375 | ama->Address); |
376 | goto next; |
377 | } |
378 | } |
379 | if (ama->EndBusNumber != bus_end) { |
380 | aprint_debug_dev(acpi_sc->sc_dev, |
381 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
382 | " -> bus %d-%d\n" , ama->PciSegment, |
383 | ama->StartBusNumber, ama->EndBusNumber, |
384 | ama->Address, ama->StartBusNumber, bus_end); |
385 | } |
386 | |
387 | if (ama->PciSegment != 0) { |
388 | aprint_debug_dev(acpi_sc->sc_dev, |
389 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 |
390 | ": ignore (non PCI segment 0)\n" , ama->PciSegment, |
391 | ama->StartBusNumber, bus_end, ama->Address); |
392 | goto next; |
393 | } |
394 | |
395 | seg = &mcfg_segs[nsegs++]; |
396 | seg->ms_address = ama->Address; |
397 | seg->ms_segment = ama->PciSegment; |
398 | seg->ms_bus_start = ama->StartBusNumber; |
399 | seg->ms_bus_end = bus_end; |
400 | seg->ms_bst = memt; |
401 | n = seg->ms_bus_end - seg->ms_bus_start + 1; |
402 | seg->ms_bus = kmem_zalloc(sizeof(*seg->ms_bus) * n, KM_SLEEP); |
403 | |
404 | next: |
405 | offset += sizeof(ACPI_MCFG_ALLOCATION); |
406 | ama = ACPI_ADD_PTR(ACPI_MCFG_ALLOCATION, ama, offset); |
407 | } |
408 | if (nsegs == 0) |
409 | return ENOENT; |
410 | |
411 | for (i = 0; i < nsegs; i++) { |
412 | seg = &mcfg_segs[i]; |
413 | aprint_verbose_dev(acpi_sc->sc_dev, |
414 | "MCFG: segment %d, bus %d-%d, address 0x%016" PRIx64 "\n" , |
415 | seg->ms_segment, seg->ms_bus_start, seg->ms_bus_end, |
416 | seg->ms_address); |
417 | } |
418 | |
419 | /* Update # of segment */ |
420 | mcfg_nsegs = nsegs; |
421 | mcfg_inited = true; |
422 | |
423 | return 0; |
424 | } |
425 | |
426 | static int |
427 | acpimcfg_ext_conf_is_aliased(pci_chipset_tag_t pc, pcitag_t tag) |
428 | { |
429 | pcireg_t id; |
430 | int i; |
431 | |
432 | id = pci_conf_read(pc, tag, PCI_ID_REG); |
433 | for (i = PCI_CONF_SIZE; i < PCI_EXTCONF_SIZE; i += PCI_CONF_SIZE) { |
434 | if (pci_conf_read(pc, tag, i) != id) |
435 | return false; |
436 | } |
437 | return true; |
438 | } |
439 | |
440 | static struct mcfg_segment * |
441 | acpimcfg_get_segment(int bus) |
442 | { |
443 | struct mcfg_segment *seg; |
444 | int i; |
445 | |
446 | for (i = 0; i < mcfg_nsegs; i++) { |
447 | seg = &mcfg_segs[i]; |
448 | if (bus >= seg->ms_bus_start && bus <= seg->ms_bus_end) |
449 | return seg; |
450 | } |
451 | return NULL; |
452 | } |
453 | |
454 | static int |
455 | acpimcfg_device_probe(const struct pci_attach_args *pa) |
456 | { |
457 | pci_chipset_tag_t pc = pa->pa_pc; |
458 | struct mcfg_segment *seg; |
459 | struct mcfg_bus *mb; |
460 | pcitag_t tag; |
461 | pcireg_t reg; |
462 | int bus = pa->pa_bus; |
463 | int dev = pa->pa_device; |
464 | int func = pa->pa_function; |
465 | int last_dev, last_func, end_func; |
466 | int alias = 0; |
467 | int i, j; |
468 | |
469 | seg = acpimcfg_get_segment(bus); |
470 | if (seg == NULL) |
471 | return 0; |
472 | |
473 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
474 | tag = pci_make_tag(pc, bus, dev, func); |
475 | |
476 | /* Mark invalid between last probed device to probed device. */ |
477 | pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); |
478 | if (dev != 0 || func != 0) { |
479 | for (i = last_dev; i <= dev; i++) { |
480 | end_func = (i == dev) ? func : 8; |
481 | for (j = last_func; j < end_func; j++) { |
482 | if (i == last_dev && j == last_func) |
483 | continue; |
484 | EXTCONF_SET_INVALID(mb, i, j); |
485 | } |
486 | last_func = 0; |
487 | } |
488 | } |
489 | mb->last_probed = tag; |
490 | |
491 | /* Probe extended configuration space. */ |
492 | if (((reg = pci_conf_read(pc, tag, PCI_CONF_SIZE)) == (pcireg_t)-1) || |
493 | (reg == 0) || (alias = acpimcfg_ext_conf_is_aliased(pc, tag))) { |
494 | aprint_debug_dev(acpi_sc->sc_dev, |
495 | "MCFG: %03d:%02d:%d: invalid config space " |
496 | "(cfg[0x%03x]=0x%08x, alias=%s)\n" , bus, dev, func, |
497 | PCI_CONF_SIZE, reg, alias ? "true" : "false" ); |
498 | EXTCONF_SET_INVALID(mb, dev, func); |
499 | } else { |
500 | aprint_debug_dev(acpi_sc->sc_dev, |
501 | "MCFG: %03d:%02d:%d: Ok (cfg[0x%03x]=0x%08x)\n" , |
502 | bus, dev, func, PCI_CONF_SIZE, reg); |
503 | mb->valid_ndevs++; |
504 | } |
505 | |
506 | return 0; |
507 | } |
508 | |
509 | static void |
510 | acpimcfg_scan_bus(struct pci_softc *sc, pci_chipset_tag_t pc, int bus) |
511 | { |
512 | static const int wildcard[PCICF_NLOCS] = { |
513 | PCICF_DEV_DEFAULT, PCICF_FUNCTION_DEFAULT |
514 | }; |
515 | |
516 | sc->sc_bus = bus; /* XXX */ |
517 | |
518 | pci_enumerate_bus(sc, wildcard, acpimcfg_device_probe, NULL); |
519 | } |
520 | |
521 | int |
522 | acpimcfg_map_bus(device_t self, pci_chipset_tag_t pc, int bus) |
523 | { |
524 | struct pci_softc *sc = device_private(self); |
525 | struct mcfg_segment *seg = NULL; |
526 | struct mcfg_bus *mb; |
527 | bus_space_handle_t bsh; |
528 | bus_addr_t baddr; |
529 | pcitag_t tag; |
530 | pcireg_t reg; |
531 | bool is_e7520_mch; |
532 | int boff; |
533 | int last_dev, last_func; |
534 | int i, j; |
535 | int error; |
536 | |
537 | if (!mcfg_inited) |
538 | return ENXIO; |
539 | |
540 | seg = acpimcfg_get_segment(bus); |
541 | if (seg == NULL) |
542 | return ENOENT; |
543 | |
544 | boff = bus - seg->ms_bus_start; |
545 | if (seg->ms_bus[boff].valid_ndevs > 0) |
546 | return 0; |
547 | |
548 | mb = &seg->ms_bus[boff]; |
549 | baddr = seg->ms_address + (boff * ACPIMCFG_SIZE_PER_BUS); |
550 | |
551 | /* Map extended configration space of all dev/func. */ |
552 | error = bus_space_map(seg->ms_bst, baddr, ACPIMCFG_SIZE_PER_BUS, 0, |
553 | &bsh); |
554 | if (error != 0) |
555 | return error; |
556 | for (i = 0; i < 32; i++) { |
557 | for (j = 0; j < 8; j++) { |
558 | error = bus_space_subregion(seg->ms_bst, bsh, |
559 | EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, |
560 | &mb->bsh[i][j]); |
561 | if (error != 0) |
562 | break; |
563 | } |
564 | } |
565 | if (error != 0) |
566 | return error; |
567 | |
568 | aprint_debug("\n" ); |
569 | |
570 | /* Probe extended configuration space of all devices. */ |
571 | memset(mb->valid_devs, 0xff, sizeof(mb->valid_devs)); |
572 | mb->valid_ndevs = 0; |
573 | mb->last_probed = pci_make_tag(pc, bus, 0, 0); |
574 | |
575 | /* |
576 | * On an Intel E7520 we have to temporarily disable |
577 | * Enhanced Config Access error detection and reporting |
578 | * by setting the appropriate error mask in HI_ERRMASK register. |
579 | * |
580 | * See "Intel E7520 Memory Controller Hub (MCH) Datasheet", |
581 | * Document 303006-002, pg. 82 |
582 | */ |
583 | tag = pci_make_tag(pc, 0, 0, 1); |
584 | reg = pci_conf_read(pc, tag, PCI_ID_REG); |
585 | is_e7520_mch = (reg == |
586 | PCI_ID_CODE(PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_E7525_MCHER)); |
587 | if (is_e7520_mch) { |
588 | reg = pci_conf_read(pc, tag, 0x54); |
589 | pci_conf_write(pc, tag, 0x54, reg | 0x20); |
590 | } |
591 | |
592 | acpimcfg_scan_bus(sc, pc, bus); |
593 | |
594 | if (is_e7520_mch) { |
595 | pci_conf_write(pc, tag, 0x54, reg); |
596 | } |
597 | |
598 | /* Unmap extended configration space of all dev/func. */ |
599 | bus_space_unmap(seg->ms_bst, bsh, ACPIMCFG_SIZE_PER_BUS); |
600 | memset(mb->bsh, 0, sizeof(mb->bsh)); |
601 | |
602 | if (mb->valid_ndevs == 0) { |
603 | aprint_debug_dev(acpi_sc->sc_dev, |
604 | "MCFG: bus %d: no valid devices.\n" , bus); |
605 | memset(mb->valid_devs, 0, sizeof(mb->valid_devs)); |
606 | goto out; |
607 | } |
608 | |
609 | /* Mark invalid on remaining all devices. */ |
610 | pci_decompose_tag(pc, mb->last_probed, NULL, &last_dev, &last_func); |
611 | for (i = last_dev; i < 32; i++) { |
612 | for (j = last_func; j < 8; j++) { |
613 | if (i == last_dev && j == last_func) { |
614 | /* Don't mark invalid to last probed device. */ |
615 | continue; |
616 | } |
617 | EXTCONF_SET_INVALID(mb, i, j); |
618 | } |
619 | last_func = 0; |
620 | } |
621 | |
622 | /* Map extended configuration space per dev/func. */ |
623 | for (i = 0; i < 32; i++) { |
624 | for (j = 0; j < 8; j++) { |
625 | if (!EXTCONF_IS_VALID(mb, i, j)) |
626 | continue; |
627 | error = bus_space_map(seg->ms_bst, |
628 | baddr + EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE, |
629 | 0, &mb->bsh[i][j]); |
630 | if (error != 0) { |
631 | /* Unmap all handles when map failed. */ |
632 | do { |
633 | while (--j >= 0) { |
634 | if (!EXTCONF_IS_VALID(mb, i, j)) |
635 | continue; |
636 | bus_space_unmap(seg->ms_bst, |
637 | mb->bsh[i][j], |
638 | PCI_EXTCONF_SIZE); |
639 | } |
640 | j = 8; |
641 | } while (--i >= 0); |
642 | memset(mb->valid_devs, 0, |
643 | sizeof(mb->valid_devs)); |
644 | goto out; |
645 | } |
646 | } |
647 | } |
648 | |
649 | aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d: valid devices\n" , bus); |
650 | for (i = 0; i < 32; i++) { |
651 | for (j = 0; j < 8; j++) { |
652 | if (EXTCONF_IS_VALID(mb, i, j)) { |
653 | aprint_debug_dev(acpi_sc->sc_dev, |
654 | "MCFG: %03d:%02d:%d\n" , bus, i, j); |
655 | } |
656 | } |
657 | } |
658 | |
659 | error = 0; |
660 | out: |
661 | aprint_debug_dev(acpi_sc->sc_dev, "%s done" , __func__); |
662 | |
663 | return error; |
664 | } |
665 | |
666 | int |
667 | acpimcfg_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t *data) |
668 | { |
669 | struct mcfg_segment *seg = NULL; |
670 | struct mcfg_bus *mb; |
671 | int bus, dev, func; |
672 | |
673 | KASSERT(reg < PCI_EXTCONF_SIZE); |
674 | KASSERT((reg & 3) == 0); |
675 | |
676 | if (!mcfg_inited) { |
677 | *data = -1; |
678 | return ENXIO; |
679 | } |
680 | |
681 | pci_decompose_tag(pc, tag, &bus, &dev, &func); |
682 | |
683 | seg = acpimcfg_get_segment(bus); |
684 | if (seg == NULL) { |
685 | *data = -1; |
686 | return ERANGE; |
687 | } |
688 | |
689 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
690 | if (!EXTCONF_IS_VALID(mb, dev, func)) { |
691 | *data = -1; |
692 | return EINVAL; |
693 | } |
694 | |
695 | *data = mcfg_ops->ao_read(seg->ms_bst, mb->bsh[dev][func], reg); |
696 | return 0; |
697 | } |
698 | |
699 | int |
700 | acpimcfg_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) |
701 | { |
702 | struct mcfg_segment *seg = NULL; |
703 | struct mcfg_bus *mb; |
704 | int bus, dev, func; |
705 | |
706 | KASSERT(reg < PCI_EXTCONF_SIZE); |
707 | KASSERT((reg & 3) == 0); |
708 | |
709 | if (!mcfg_inited) |
710 | return ENXIO; |
711 | |
712 | pci_decompose_tag(pc, tag, &bus, &dev, &func); |
713 | |
714 | seg = acpimcfg_get_segment(bus); |
715 | if (seg == NULL) |
716 | return ERANGE; |
717 | |
718 | mb = &seg->ms_bus[bus - seg->ms_bus_start]; |
719 | if (!EXTCONF_IS_VALID(mb, dev, func)) |
720 | return EINVAL; |
721 | |
722 | mcfg_ops->ao_write(seg->ms_bst, mb->bsh[dev][func], reg, data); |
723 | return 0; |
724 | } |
725 | |