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42#include <linux/init.h>
43#include <linux/module.h>
44
45#include <linux/kernel.h>
46#include <linux/pci.h>
47#include <linux/pci_hotplug.h>
48#include <linux/pci-acpi.h>
49#include <linux/mutex.h>
50#include <linux/slab.h>
51
52#include "../pci.h"
53#include "acpiphp.h"
54
55static LIST_HEAD(bridge_list);
56
57#define MY_NAME "acpiphp_glue"
58
59static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
60static void acpiphp_sanitize_bus(struct pci_bus *bus);
61static void acpiphp_set_hpp_values(struct pci_bus *bus);
62static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context);
63
64
65static acpi_status
66is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv)
67{
68 int *count = (int *)context;
69
70 if (is_dock_device(handle)) {
71 (*count)++;
72 return AE_CTRL_TERMINATE;
73 } else {
74 return AE_OK;
75 }
76}
77
78
79
80
81
82
83
84
85static int post_dock_fixups(struct notifier_block *nb, unsigned long val,
86 void *v)
87{
88 struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb);
89 struct pci_bus *bus = func->slot->bridge->pci_bus;
90 u32 buses;
91
92 if (!bus->self)
93 return NOTIFY_OK;
94
95
96
97
98 pci_read_config_dword(bus->self,
99 PCI_PRIMARY_BUS,
100 &buses);
101
102 if (((buses >> 8) & 0xff) != bus->secondary) {
103 buses = (buses & 0xff000000)
104 | ((unsigned int)(bus->primary) << 0)
105 | ((unsigned int)(bus->secondary) << 8)
106 | ((unsigned int)(bus->subordinate) << 16);
107 pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses);
108 }
109 return NOTIFY_OK;
110}
111
112
113static const struct acpi_dock_ops acpiphp_dock_ops = {
114 .handler = handle_hotplug_event_func,
115};
116
117
118static acpi_status
119register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
120{
121 struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
122 struct acpiphp_slot *slot;
123 struct acpiphp_func *newfunc;
124 acpi_handle tmp;
125 acpi_status status = AE_OK;
126 unsigned long long adr, sun;
127 int device, function, retval;
128 struct pci_bus *pbus = bridge->pci_bus;
129 struct pci_dev *pdev;
130
131 if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle))
132 return AE_OK;
133
134 acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
135 device = (adr >> 16) & 0xffff;
136 function = adr & 0xffff;
137
138 newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
139 if (!newfunc)
140 return AE_NO_MEMORY;
141
142 INIT_LIST_HEAD(&newfunc->sibling);
143 newfunc->handle = handle;
144 newfunc->function = function;
145
146 if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
147 newfunc->flags = FUNC_HAS_EJ0;
148
149 if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
150 newfunc->flags |= FUNC_HAS_STA;
151
152 if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
153 newfunc->flags |= FUNC_HAS_PS0;
154
155 if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
156 newfunc->flags |= FUNC_HAS_PS3;
157
158 if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp)))
159 newfunc->flags |= FUNC_HAS_DCK;
160
161 status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
162 if (ACPI_FAILURE(status)) {
163
164
165
166
167 sun = bridge->nr_slots+1;
168 }
169
170
171 for (slot = bridge->slots; slot; slot = slot->next)
172 if (slot->device == device) {
173 if (slot->sun != sun)
174 warn("sibling found, but _SUN doesn't match!\n");
175 break;
176 }
177
178 if (!slot) {
179 slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
180 if (!slot) {
181 kfree(newfunc);
182 return AE_NO_MEMORY;
183 }
184
185 slot->bridge = bridge;
186 slot->device = device;
187 slot->sun = sun;
188 INIT_LIST_HEAD(&slot->funcs);
189 mutex_init(&slot->crit_sect);
190
191 slot->next = bridge->slots;
192 bridge->slots = slot;
193
194 bridge->nr_slots++;
195
196 dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
197 slot->sun, pci_domain_nr(pbus), pbus->number, device);
198 retval = acpiphp_register_hotplug_slot(slot);
199 if (retval) {
200 if (retval == -EBUSY)
201 warn("Slot %llu already registered by another "
202 "hotplug driver\n", slot->sun);
203 else
204 warn("acpiphp_register_hotplug_slot failed "
205 "(err code = 0x%x)\n", retval);
206 goto err_exit;
207 }
208 }
209
210 newfunc->slot = slot;
211 list_add_tail(&newfunc->sibling, &slot->funcs);
212
213 pdev = pci_get_slot(pbus, PCI_DEVFN(device, function));
214 if (pdev) {
215 pdev->current_state = PCI_D0;
216 slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
217 pci_dev_put(pdev);
218 }
219
220 if (is_dock_device(handle)) {
221
222
223
224
225 newfunc->flags &= ~FUNC_HAS_EJ0;
226 if (register_hotplug_dock_device(handle,
227 &acpiphp_dock_ops, newfunc))
228 dbg("failed to register dock device\n");
229
230
231
232
233
234 newfunc->nb.notifier_call = post_dock_fixups;
235 if (register_dock_notifier(&newfunc->nb))
236 dbg("failed to register a dock notifier");
237 }
238
239
240 if (!(newfunc->flags & FUNC_HAS_DCK)) {
241 status = acpi_install_notify_handler(handle,
242 ACPI_SYSTEM_NOTIFY,
243 handle_hotplug_event_func,
244 newfunc);
245
246 if (ACPI_FAILURE(status))
247 err("failed to register interrupt notify handler\n");
248 } else
249 status = AE_OK;
250
251 return status;
252
253 err_exit:
254 bridge->nr_slots--;
255 bridge->slots = slot->next;
256 kfree(slot);
257 kfree(newfunc);
258
259 return AE_OK;
260}
261
262
263
264static int detect_ejectable_slots(acpi_handle handle)
265{
266 int found = acpi_pci_detect_ejectable(handle);
267 if (!found) {
268 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
269 is_pci_dock_device, NULL, (void *)&found, NULL);
270 }
271 return found;
272}
273
274
275static void init_bridge_misc(struct acpiphp_bridge *bridge)
276{
277 acpi_status status;
278
279
280 list_add(&bridge->list, &bridge_list);
281
282
283 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
284 register_slot, NULL, bridge, NULL);
285 if (ACPI_FAILURE(status)) {
286 list_del(&bridge->list);
287 return;
288 }
289
290
291 if (bridge->type != BRIDGE_TYPE_HOST) {
292 if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
293 status = acpi_remove_notify_handler(bridge->func->handle,
294 ACPI_SYSTEM_NOTIFY,
295 handle_hotplug_event_func);
296 if (ACPI_FAILURE(status))
297 err("failed to remove notify handler\n");
298 }
299 status = acpi_install_notify_handler(bridge->handle,
300 ACPI_SYSTEM_NOTIFY,
301 handle_hotplug_event_bridge,
302 bridge);
303
304 if (ACPI_FAILURE(status)) {
305 err("failed to register interrupt notify handler\n");
306 }
307 }
308}
309
310
311
312static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle)
313{
314 struct acpiphp_bridge *bridge;
315 struct acpiphp_slot *slot;
316 struct acpiphp_func *func;
317
318 list_for_each_entry(bridge, &bridge_list, list) {
319 for (slot = bridge->slots; slot; slot = slot->next) {
320 list_for_each_entry(func, &slot->funcs, sibling) {
321 if (func->handle == handle)
322 return func;
323 }
324 }
325 }
326
327 return NULL;
328}
329
330
331static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
332{
333 acpi_handle dummy_handle;
334
335 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
336 "_STA", &dummy_handle)))
337 bridge->flags |= BRIDGE_HAS_STA;
338
339 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
340 "_EJ0", &dummy_handle)))
341 bridge->flags |= BRIDGE_HAS_EJ0;
342
343 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
344 "_PS0", &dummy_handle)))
345 bridge->flags |= BRIDGE_HAS_PS0;
346
347 if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
348 "_PS3", &dummy_handle)))
349 bridge->flags |= BRIDGE_HAS_PS3;
350
351
352 if (bridge->flags & BRIDGE_HAS_EJ0) {
353 struct acpiphp_func *func;
354
355 dbg("found ejectable p2p bridge\n");
356
357
358 func = acpiphp_bridge_handle_to_function(bridge->handle);
359 if (!func)
360 return;
361 bridge->func = func;
362 func->bridge = bridge;
363 }
364}
365
366
367
368static void add_host_bridge(acpi_handle *handle)
369{
370 struct acpiphp_bridge *bridge;
371 struct acpi_pci_root *root = acpi_pci_find_root(handle);
372
373 bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
374 if (bridge == NULL)
375 return;
376
377 bridge->type = BRIDGE_TYPE_HOST;
378 bridge->handle = handle;
379
380 bridge->pci_bus = root->bus;
381
382 spin_lock_init(&bridge->res_lock);
383
384 init_bridge_misc(bridge);
385}
386
387
388
389static void add_p2p_bridge(acpi_handle *handle)
390{
391 struct acpiphp_bridge *bridge;
392
393 bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
394 if (bridge == NULL) {
395 err("out of memory\n");
396 return;
397 }
398
399 bridge->type = BRIDGE_TYPE_P2P;
400 bridge->handle = handle;
401 config_p2p_bridge_flags(bridge);
402
403 bridge->pci_dev = acpi_get_pci_dev(handle);
404 bridge->pci_bus = bridge->pci_dev->subordinate;
405 if (!bridge->pci_bus) {
406 err("This is not a PCI-to-PCI bridge!\n");
407 goto err;
408 }
409
410
411
412
413
414
415 get_device(&bridge->pci_bus->dev);
416 spin_lock_init(&bridge->res_lock);
417
418 init_bridge_misc(bridge);
419 return;
420 err:
421 pci_dev_put(bridge->pci_dev);
422 kfree(bridge);
423 return;
424}
425
426
427
428static acpi_status
429find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
430{
431 acpi_status status;
432 struct pci_dev *dev;
433
434 dev = acpi_get_pci_dev(handle);
435 if (!dev || !dev->subordinate)
436 goto out;
437
438
439 if ((detect_ejectable_slots(handle) > 0)) {
440 dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
441 add_p2p_bridge(handle);
442 }
443
444
445 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
446 find_p2p_bridge, NULL, NULL, NULL);
447 if (ACPI_FAILURE(status))
448 warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
449
450 out:
451 pci_dev_put(dev);
452 return AE_OK;
453}
454
455
456
457static int add_bridge(acpi_handle handle)
458{
459 acpi_status status;
460 unsigned long long tmp;
461 acpi_handle dummy_handle;
462
463
464 status = acpi_get_handle(handle, "_STA", &dummy_handle);
465 if (ACPI_SUCCESS(status)) {
466 status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp);
467 if (ACPI_FAILURE(status)) {
468 dbg("%s: _STA evaluation failure\n", __func__);
469 return 0;
470 }
471 if ((tmp & ACPI_STA_FUNCTIONING) == 0)
472
473 return 0;
474 }
475
476
477 if (detect_ejectable_slots(handle) > 0) {
478 dbg("found PCI host-bus bridge with hot-pluggable slots\n");
479 add_host_bridge(handle);
480 }
481
482
483 status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
484 find_p2p_bridge, NULL, NULL, NULL);
485
486 if (ACPI_FAILURE(status))
487 warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
488
489 return 0;
490}
491
492static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
493{
494 struct acpiphp_bridge *bridge;
495
496 list_for_each_entry(bridge, &bridge_list, list)
497 if (bridge->handle == handle)
498 return bridge;
499
500 return NULL;
501}
502
503static void cleanup_bridge(struct acpiphp_bridge *bridge)
504{
505 struct acpiphp_slot *slot, *next;
506 struct acpiphp_func *func, *tmp;
507 acpi_status status;
508 acpi_handle handle = bridge->handle;
509
510 status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
511 handle_hotplug_event_bridge);
512 if (ACPI_FAILURE(status))
513 err("failed to remove notify handler\n");
514
515 if ((bridge->type != BRIDGE_TYPE_HOST) &&
516 ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) {
517 status = acpi_install_notify_handler(bridge->func->handle,
518 ACPI_SYSTEM_NOTIFY,
519 handle_hotplug_event_func,
520 bridge->func);
521 if (ACPI_FAILURE(status))
522 err("failed to install interrupt notify handler\n");
523 }
524
525 slot = bridge->slots;
526 while (slot) {
527 next = slot->next;
528 list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) {
529 if (is_dock_device(func->handle)) {
530 unregister_hotplug_dock_device(func->handle);
531 unregister_dock_notifier(&func->nb);
532 }
533 if (!(func->flags & FUNC_HAS_DCK)) {
534 status = acpi_remove_notify_handler(func->handle,
535 ACPI_SYSTEM_NOTIFY,
536 handle_hotplug_event_func);
537 if (ACPI_FAILURE(status))
538 err("failed to remove notify handler\n");
539 }
540 list_del(&func->sibling);
541 kfree(func);
542 }
543 acpiphp_unregister_hotplug_slot(slot);
544 list_del(&slot->funcs);
545 kfree(slot);
546 slot = next;
547 }
548
549
550
551
552 if (bridge->pci_dev)
553 put_device(&bridge->pci_bus->dev);
554
555 pci_dev_put(bridge->pci_dev);
556 list_del(&bridge->list);
557 kfree(bridge);
558}
559
560static acpi_status
561cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
562{
563 struct acpiphp_bridge *bridge;
564
565
566
567 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
568 cleanup_p2p_bridge, NULL, NULL, NULL);
569
570 bridge = acpiphp_handle_to_bridge(handle);
571 if (bridge)
572 cleanup_bridge(bridge);
573
574 return AE_OK;
575}
576
577static void remove_bridge(acpi_handle handle)
578{
579 struct acpiphp_bridge *bridge;
580
581
582
583 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
584 (u32)1, cleanup_p2p_bridge, NULL, NULL, NULL);
585
586
587
588
589
590
591
592
593 bridge = acpiphp_handle_to_bridge(handle);
594 if (bridge)
595 cleanup_bridge(bridge);
596 else
597 acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
598 handle_hotplug_event_bridge);
599}
600
601static int power_on_slot(struct acpiphp_slot *slot)
602{
603 acpi_status status;
604 struct acpiphp_func *func;
605 int retval = 0;
606
607
608 if (slot->flags & SLOT_POWEREDON)
609 goto err_exit;
610
611 list_for_each_entry(func, &slot->funcs, sibling) {
612 if (func->flags & FUNC_HAS_PS0) {
613 dbg("%s: executing _PS0\n", __func__);
614 status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL);
615 if (ACPI_FAILURE(status)) {
616 warn("%s: _PS0 failed\n", __func__);
617 retval = -1;
618 goto err_exit;
619 } else
620 break;
621 }
622 }
623
624
625
626 slot->flags |= SLOT_POWEREDON;
627
628 err_exit:
629 return retval;
630}
631
632
633static int power_off_slot(struct acpiphp_slot *slot)
634{
635 acpi_status status;
636 struct acpiphp_func *func;
637
638 int retval = 0;
639
640
641 if ((slot->flags & SLOT_POWEREDON) == 0)
642 goto err_exit;
643
644 list_for_each_entry(func, &slot->funcs, sibling) {
645 if (func->flags & FUNC_HAS_PS3) {
646 status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL);
647 if (ACPI_FAILURE(status)) {
648 warn("%s: _PS3 failed\n", __func__);
649 retval = -1;
650 goto err_exit;
651 } else
652 break;
653 }
654 }
655
656
657
658 slot->flags &= (~SLOT_POWEREDON);
659
660 err_exit:
661 return retval;
662}
663
664
665
666
667
668
669
670static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
671{
672 struct list_head *tmp;
673 unsigned char max, n;
674
675
676
677
678
679
680
681
682
683 max = bus->secondary;
684
685 list_for_each(tmp, &bus->children) {
686 n = pci_bus_max_busnr(pci_bus_b(tmp));
687 if (n > max)
688 max = n;
689 }
690 return max;
691}
692
693
694
695
696
697
698static int acpiphp_bus_add(struct acpiphp_func *func)
699{
700 acpi_handle phandle;
701 struct acpi_device *device, *pdevice;
702 int ret_val;
703
704 acpi_get_parent(func->handle, &phandle);
705 if (acpi_bus_get_device(phandle, &pdevice)) {
706 dbg("no parent device, assuming NULL\n");
707 pdevice = NULL;
708 }
709 if (!acpi_bus_get_device(func->handle, &device)) {
710 dbg("bus exists... trim\n");
711
712
713
714 ret_val = acpi_bus_trim(device, 1);
715 dbg("acpi_bus_trim return %x\n", ret_val);
716 }
717
718 ret_val = acpi_bus_add(&device, pdevice, func->handle,
719 ACPI_BUS_TYPE_DEVICE);
720 if (ret_val) {
721 dbg("error adding bus, %x\n",
722 -ret_val);
723 goto acpiphp_bus_add_out;
724 }
725 ret_val = acpi_bus_start(device);
726
727acpiphp_bus_add_out:
728 return ret_val;
729}
730
731
732
733
734
735
736static int acpiphp_bus_trim(acpi_handle handle)
737{
738 struct acpi_device *device;
739 int retval;
740
741 retval = acpi_bus_get_device(handle, &device);
742 if (retval) {
743 dbg("acpi_device not found\n");
744 return retval;
745 }
746
747 retval = acpi_bus_trim(device, 1);
748 if (retval)
749 err("cannot remove from acpi list\n");
750
751 return retval;
752}
753
754static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
755{
756 struct acpiphp_func *func;
757 union acpi_object params[2];
758 struct acpi_object_list arg_list;
759
760 list_for_each_entry(func, &slot->funcs, sibling) {
761 arg_list.count = 2;
762 arg_list.pointer = params;
763 params[0].type = ACPI_TYPE_INTEGER;
764 params[0].integer.value = ACPI_ADR_SPACE_PCI_CONFIG;
765 params[1].type = ACPI_TYPE_INTEGER;
766 params[1].integer.value = 1;
767
768 acpi_evaluate_object(func->handle, "_REG", &arg_list, NULL);
769 }
770}
771
772
773
774
775
776
777
778
779static int __ref enable_device(struct acpiphp_slot *slot)
780{
781 struct pci_dev *dev;
782 struct pci_bus *bus = slot->bridge->pci_bus;
783 struct acpiphp_func *func;
784 int retval = 0;
785 int num, max, pass;
786 acpi_status status;
787
788 if (slot->flags & SLOT_ENABLED)
789 goto err_exit;
790
791
792 dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0));
793 if (dev) {
794
795 err("pci_dev structure already exists.\n");
796 pci_dev_put(dev);
797 retval = -1;
798 goto err_exit;
799 }
800
801 num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0));
802 if (num == 0) {
803 err("No new device found\n");
804 retval = -1;
805 goto err_exit;
806 }
807
808 max = acpiphp_max_busnr(bus);
809 for (pass = 0; pass < 2; pass++) {
810 list_for_each_entry(dev, &bus->devices, bus_list) {
811 if (PCI_SLOT(dev->devfn) != slot->device)
812 continue;
813 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
814 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
815 max = pci_scan_bridge(bus, dev, max, pass);
816 if (pass && dev->subordinate)
817 pci_bus_size_bridges(dev->subordinate);
818 }
819 }
820 }
821
822 list_for_each_entry(func, &slot->funcs, sibling)
823 acpiphp_bus_add(func);
824
825 pci_bus_assign_resources(bus);
826 acpiphp_sanitize_bus(bus);
827 acpiphp_set_hpp_values(bus);
828 acpiphp_set_acpi_region(slot);
829 pci_enable_bridges(bus);
830
831 list_for_each_entry(dev, &bus->devices, bus_list) {
832
833 if (!dev->is_added)
834 dev->current_state = PCI_D0;
835 }
836
837 pci_bus_add_devices(bus);
838
839 list_for_each_entry(func, &slot->funcs, sibling) {
840 dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
841 func->function));
842 if (!dev)
843 continue;
844
845 if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
846 dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) {
847 pci_dev_put(dev);
848 continue;
849 }
850
851 status = find_p2p_bridge(func->handle, (u32)1, bus, NULL);
852 if (ACPI_FAILURE(status))
853 warn("find_p2p_bridge failed (error code = 0x%x)\n",
854 status);
855 pci_dev_put(dev);
856 }
857
858 slot->flags |= SLOT_ENABLED;
859
860 err_exit:
861 return retval;
862}
863
864static void disable_bridges(struct pci_bus *bus)
865{
866 struct pci_dev *dev;
867 list_for_each_entry(dev, &bus->devices, bus_list) {
868 if (dev->subordinate) {
869 disable_bridges(dev->subordinate);
870 pci_disable_device(dev);
871 }
872 }
873}
874
875
876
877
878
879static int disable_device(struct acpiphp_slot *slot)
880{
881 struct acpiphp_func *func;
882 struct pci_dev *pdev;
883
884
885 if (!(slot->flags & SLOT_ENABLED))
886 goto err_exit;
887
888 list_for_each_entry(func, &slot->funcs, sibling) {
889 if (func->bridge) {
890
891 cleanup_p2p_bridge(func->bridge->handle,
892 (u32)1, NULL, NULL);
893 func->bridge = NULL;
894 }
895
896 pdev = pci_get_slot(slot->bridge->pci_bus,
897 PCI_DEVFN(slot->device, func->function));
898 if (pdev) {
899 pci_stop_bus_device(pdev);
900 if (pdev->subordinate) {
901 disable_bridges(pdev->subordinate);
902 pci_disable_device(pdev);
903 }
904 pci_remove_bus_device(pdev);
905 pci_dev_put(pdev);
906 }
907 }
908
909 list_for_each_entry(func, &slot->funcs, sibling) {
910 acpiphp_bus_trim(func->handle);
911 }
912
913 slot->flags &= (~SLOT_ENABLED);
914
915err_exit:
916 return 0;
917}
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932static unsigned int get_slot_status(struct acpiphp_slot *slot)
933{
934 acpi_status status;
935 unsigned long long sta = 0;
936 u32 dvid;
937 struct acpiphp_func *func;
938
939 list_for_each_entry(func, &slot->funcs, sibling) {
940 if (func->flags & FUNC_HAS_STA) {
941 status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta);
942 if (ACPI_SUCCESS(status) && sta)
943 break;
944 } else {
945 pci_bus_read_config_dword(slot->bridge->pci_bus,
946 PCI_DEVFN(slot->device,
947 func->function),
948 PCI_VENDOR_ID, &dvid);
949 if (dvid != 0xffffffff) {
950 sta = ACPI_STA_ALL;
951 break;
952 }
953 }
954 }
955
956 return (unsigned int)sta;
957}
958
959
960
961
962
963int acpiphp_eject_slot(struct acpiphp_slot *slot)
964{
965 acpi_status status;
966 struct acpiphp_func *func;
967 struct acpi_object_list arg_list;
968 union acpi_object arg;
969
970 list_for_each_entry(func, &slot->funcs, sibling) {
971
972 if ((func->flags & FUNC_HAS_EJ0)) {
973
974 arg_list.count = 1;
975 arg_list.pointer = &arg;
976 arg.type = ACPI_TYPE_INTEGER;
977 arg.integer.value = 1;
978
979 status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
980 if (ACPI_FAILURE(status)) {
981 warn("%s: _EJ0 failed\n", __func__);
982 return -1;
983 } else
984 break;
985 }
986 }
987 return 0;
988}
989
990
991
992
993
994
995
996
997static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
998{
999 struct acpiphp_slot *slot;
1000 int retval = 0;
1001 int enabled, disabled;
1002
1003 enabled = disabled = 0;
1004
1005 for (slot = bridge->slots; slot; slot = slot->next) {
1006 unsigned int status = get_slot_status(slot);
1007 if (slot->flags & SLOT_ENABLED) {
1008 if (status == ACPI_STA_ALL)
1009 continue;
1010 retval = acpiphp_disable_slot(slot);
1011 if (retval) {
1012 err("Error occurred in disabling\n");
1013 goto err_exit;
1014 } else {
1015 acpiphp_eject_slot(slot);
1016 }
1017 disabled++;
1018 } else {
1019 if (status != ACPI_STA_ALL)
1020 continue;
1021 retval = acpiphp_enable_slot(slot);
1022 if (retval) {
1023 err("Error occurred in enabling\n");
1024 goto err_exit;
1025 }
1026 enabled++;
1027 }
1028 }
1029
1030 dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled);
1031
1032 err_exit:
1033 return retval;
1034}
1035
1036static void acpiphp_set_hpp_values(struct pci_bus *bus)
1037{
1038 struct pci_dev *dev;
1039
1040 list_for_each_entry(dev, &bus->devices, bus_list)
1041 pci_configure_slot(dev);
1042}
1043
1044
1045
1046
1047
1048static void acpiphp_sanitize_bus(struct pci_bus *bus)
1049{
1050 struct pci_dev *dev;
1051 int i;
1052 unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM;
1053
1054 list_for_each_entry(dev, &bus->devices, bus_list) {
1055 for (i=0; i<PCI_BRIDGE_RESOURCES; i++) {
1056 struct resource *res = &dev->resource[i];
1057 if ((res->flags & type_mask) && !res->start &&
1058 res->end) {
1059
1060
1061 pci_remove_bus_device(dev);
1062 break;
1063 }
1064 }
1065 }
1066}
1067
1068
1069static int acpiphp_configure_bridge (acpi_handle handle)
1070{
1071 struct pci_bus *bus;
1072
1073 if (acpi_is_root_bridge(handle)) {
1074 struct acpi_pci_root *root = acpi_pci_find_root(handle);
1075 bus = root->bus;
1076 } else {
1077 struct pci_dev *pdev = acpi_get_pci_dev(handle);
1078 bus = pdev->subordinate;
1079 pci_dev_put(pdev);
1080 }
1081
1082 pci_bus_size_bridges(bus);
1083 pci_bus_assign_resources(bus);
1084 acpiphp_sanitize_bus(bus);
1085 acpiphp_set_hpp_values(bus);
1086 pci_enable_bridges(bus);
1087 return 0;
1088}
1089
1090static void handle_bridge_insertion(acpi_handle handle, u32 type)
1091{
1092 struct acpi_device *device, *pdevice;
1093 acpi_handle phandle;
1094
1095 if ((type != ACPI_NOTIFY_BUS_CHECK) &&
1096 (type != ACPI_NOTIFY_DEVICE_CHECK)) {
1097 err("unexpected notification type %d\n", type);
1098 return;
1099 }
1100
1101 acpi_get_parent(handle, &phandle);
1102 if (acpi_bus_get_device(phandle, &pdevice)) {
1103 dbg("no parent device, assuming NULL\n");
1104 pdevice = NULL;
1105 }
1106 if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) {
1107 err("cannot add bridge to acpi list\n");
1108 return;
1109 }
1110 if (!acpiphp_configure_bridge(handle) &&
1111 !acpi_bus_start(device))
1112 add_bridge(handle);
1113 else
1114 err("cannot configure and start bridge\n");
1115
1116}
1117
1118
1119
1120
1121
1122static acpi_status
1123count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
1124{
1125 int *count = (int *)context;
1126 struct acpiphp_bridge *bridge;
1127
1128 bridge = acpiphp_handle_to_bridge(handle);
1129 if (bridge)
1130 (*count)++;
1131 return AE_OK ;
1132}
1133
1134static acpi_status
1135check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
1136{
1137 struct acpiphp_bridge *bridge;
1138 char objname[64];
1139 struct acpi_buffer buffer = { .length = sizeof(objname),
1140 .pointer = objname };
1141
1142 bridge = acpiphp_handle_to_bridge(handle);
1143 if (bridge) {
1144 acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
1145 dbg("%s: re-enumerating slots under %s\n",
1146 __func__, objname);
1147 acpiphp_check_bridge(bridge);
1148 }
1149 return AE_OK ;
1150}
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context)
1161{
1162 struct acpiphp_bridge *bridge;
1163 char objname[64];
1164 struct acpi_buffer buffer = { .length = sizeof(objname),
1165 .pointer = objname };
1166 struct acpi_device *device;
1167 int num_sub_bridges = 0;
1168
1169 if (acpi_bus_get_device(handle, &device)) {
1170
1171 handle_bridge_insertion(handle, type);
1172 return;
1173 }
1174
1175 bridge = acpiphp_handle_to_bridge(handle);
1176 if (type == ACPI_NOTIFY_BUS_CHECK) {
1177 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX,
1178 count_sub_bridges, NULL, &num_sub_bridges, NULL);
1179 }
1180
1181 if (!bridge && !num_sub_bridges) {
1182 err("cannot get bridge info\n");
1183 return;
1184 }
1185
1186 acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
1187
1188 switch (type) {
1189 case ACPI_NOTIFY_BUS_CHECK:
1190
1191 dbg("%s: Bus check notify on %s\n", __func__, objname);
1192 if (bridge) {
1193 dbg("%s: re-enumerating slots under %s\n",
1194 __func__, objname);
1195 acpiphp_check_bridge(bridge);
1196 }
1197 if (num_sub_bridges)
1198 acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
1199 ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL, NULL);
1200 break;
1201
1202 case ACPI_NOTIFY_DEVICE_CHECK:
1203
1204 dbg("%s: Device check notify on %s\n", __func__, objname);
1205 acpiphp_check_bridge(bridge);
1206 break;
1207
1208 case ACPI_NOTIFY_DEVICE_WAKE:
1209
1210 dbg("%s: Device wake notify on %s\n", __func__, objname);
1211 break;
1212
1213 case ACPI_NOTIFY_EJECT_REQUEST:
1214
1215 dbg("%s: Device eject notify on %s\n", __func__, objname);
1216 if ((bridge->type != BRIDGE_TYPE_HOST) &&
1217 (bridge->flags & BRIDGE_HAS_EJ0)) {
1218 struct acpiphp_slot *slot;
1219 slot = bridge->func->slot;
1220 if (!acpiphp_disable_slot(slot))
1221 acpiphp_eject_slot(slot);
1222 }
1223 break;
1224
1225 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
1226 printk(KERN_ERR "Device %s cannot be configured due"
1227 " to a frequency mismatch\n", objname);
1228 break;
1229
1230 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
1231 printk(KERN_ERR "Device %s cannot be configured due"
1232 " to a bus mode mismatch\n", objname);
1233 break;
1234
1235 case ACPI_NOTIFY_POWER_FAULT:
1236 printk(KERN_ERR "Device %s has suffered a power fault\n",
1237 objname);
1238 break;
1239
1240 default:
1241 warn("notify_handler: unknown event type 0x%x for %s\n", type, objname);
1242 break;
1243 }
1244}
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context)
1255{
1256 struct acpiphp_func *func;
1257 char objname[64];
1258 struct acpi_buffer buffer = { .length = sizeof(objname),
1259 .pointer = objname };
1260
1261 acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
1262
1263 func = (struct acpiphp_func *)context;
1264
1265 switch (type) {
1266 case ACPI_NOTIFY_BUS_CHECK:
1267
1268 dbg("%s: Bus check notify on %s\n", __func__, objname);
1269 acpiphp_enable_slot(func->slot);
1270 break;
1271
1272 case ACPI_NOTIFY_DEVICE_CHECK:
1273
1274 dbg("%s: Device check notify on %s\n", __func__, objname);
1275 acpiphp_check_bridge(func->slot->bridge);
1276 break;
1277
1278 case ACPI_NOTIFY_DEVICE_WAKE:
1279
1280 dbg("%s: Device wake notify on %s\n", __func__, objname);
1281 break;
1282
1283 case ACPI_NOTIFY_EJECT_REQUEST:
1284
1285 dbg("%s: Device eject notify on %s\n", __func__, objname);
1286 if (!(acpiphp_disable_slot(func->slot)))
1287 acpiphp_eject_slot(func->slot);
1288 break;
1289
1290 default:
1291 warn("notify_handler: unknown event type 0x%x for %s\n", type, objname);
1292 break;
1293 }
1294}
1295
1296
1297static acpi_status
1298find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
1299{
1300 int *count = (int *)context;
1301
1302 if (acpi_is_root_bridge(handle)) {
1303 acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
1304 handle_hotplug_event_bridge, NULL);
1305 (*count)++;
1306 }
1307 return AE_OK ;
1308}
1309
1310static struct acpi_pci_driver acpi_pci_hp_driver = {
1311 .add = add_bridge,
1312 .remove = remove_bridge,
1313};
1314
1315
1316
1317
1318int __init acpiphp_glue_init(void)
1319{
1320 int num = 0;
1321
1322 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
1323 ACPI_UINT32_MAX, find_root_bridges, NULL, &num, NULL);
1324
1325 if (num <= 0)
1326 return -1;
1327 else
1328 acpi_pci_register_driver(&acpi_pci_hp_driver);
1329
1330 return 0;
1331}
1332
1333
1334
1335
1336
1337
1338
1339void acpiphp_glue_exit(void)
1340{
1341 acpi_pci_unregister_driver(&acpi_pci_hp_driver);
1342}
1343
1344
1345
1346
1347
1348int __init acpiphp_get_num_slots(void)
1349{
1350 struct acpiphp_bridge *bridge;
1351 int num_slots = 0;
1352
1353 list_for_each_entry(bridge, &bridge_list, list) {
1354 dbg("Bus %04x:%02x has %d slot%s\n",
1355 pci_domain_nr(bridge->pci_bus),
1356 bridge->pci_bus->number, bridge->nr_slots,
1357 bridge->nr_slots == 1 ? "" : "s");
1358 num_slots += bridge->nr_slots;
1359 }
1360
1361 dbg("Total %d slots\n", num_slots);
1362 return num_slots;
1363}
1364
1365
1366#if 0
1367
1368
1369
1370
1371
1372static int acpiphp_for_each_slot(acpiphp_callback fn, void *data)
1373{
1374 struct list_head *node;
1375 struct acpiphp_bridge *bridge;
1376 struct acpiphp_slot *slot;
1377 int retval = 0;
1378
1379 list_for_each (node, &bridge_list) {
1380 bridge = (struct acpiphp_bridge *)node;
1381 for (slot = bridge->slots; slot; slot = slot->next) {
1382 retval = fn(slot, data);
1383 if (!retval)
1384 goto err_exit;
1385 }
1386 }
1387
1388 err_exit:
1389 return retval;
1390}
1391#endif
1392
1393
1394
1395
1396
1397
1398int acpiphp_enable_slot(struct acpiphp_slot *slot)
1399{
1400 int retval;
1401
1402 mutex_lock(&slot->crit_sect);
1403
1404
1405 retval = power_on_slot(slot);
1406 if (retval)
1407 goto err_exit;
1408
1409 if (get_slot_status(slot) == ACPI_STA_ALL) {
1410
1411 retval = enable_device(slot);
1412 if (retval)
1413 power_off_slot(slot);
1414 } else {
1415 dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__);
1416 power_off_slot(slot);
1417 }
1418
1419 err_exit:
1420 mutex_unlock(&slot->crit_sect);
1421 return retval;
1422}
1423
1424
1425
1426
1427
1428int acpiphp_disable_slot(struct acpiphp_slot *slot)
1429{
1430 int retval = 0;
1431
1432 mutex_lock(&slot->crit_sect);
1433
1434
1435 retval = disable_device(slot);
1436 if (retval)
1437 goto err_exit;
1438
1439
1440 retval = power_off_slot(slot);
1441 if (retval)
1442 goto err_exit;
1443
1444 err_exit:
1445 mutex_unlock(&slot->crit_sect);
1446 return retval;
1447}
1448
1449
1450
1451
1452
1453
1454u8 acpiphp_get_power_status(struct acpiphp_slot *slot)
1455{
1456 return (slot->flags & SLOT_POWEREDON);
1457}
1458
1459
1460
1461
1462
1463
1464u8 acpiphp_get_latch_status(struct acpiphp_slot *slot)
1465{
1466 unsigned int sta;
1467
1468 sta = get_slot_status(slot);
1469
1470 return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1;
1471}
1472
1473
1474
1475
1476
1477
1478u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot)
1479{
1480 unsigned int sta;
1481
1482 sta = get_slot_status(slot);
1483
1484 return (sta == 0) ? 0 : 1;
1485}
1486