Lines Matching full:link
3 * pci_link.c - ACPI PCI Interrupt Link Device Driver ($Revision: 34 $)
10 * 1. Support more than one IRQ resource entry per link device (index).
33 #define ACPI_PCI_LINK_DEVICE_NAME "PCI Interrupt Link"
54 * If a link is initialized, we never change its active and initialized
55 * later even the link is disable. Instead, we just repick the active irq
80 PCI Link Device Management
84 * set context (link) possible list from resource list
89 struct acpi_pci_link *link = context; in acpi_pci_link_check_possible() local
113 link->irq.possible[i] = p->interrupts[i]; in acpi_pci_link_check_possible()
114 link->irq.possible_count++; in acpi_pci_link_check_possible()
116 link->irq.triggering = p->triggering; in acpi_pci_link_check_possible()
117 link->irq.polarity = p->polarity; in acpi_pci_link_check_possible()
118 link->irq.resource_type = ACPI_RESOURCE_TYPE_IRQ; in acpi_pci_link_check_possible()
139 link->irq.possible[i] = p->interrupts[i]; in acpi_pci_link_check_possible()
140 link->irq.possible_count++; in acpi_pci_link_check_possible()
142 link->irq.triggering = p->triggering; in acpi_pci_link_check_possible()
143 link->irq.polarity = p->polarity; in acpi_pci_link_check_possible()
144 link->irq.resource_type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ; in acpi_pci_link_check_possible()
156 static int acpi_pci_link_get_possible(struct acpi_pci_link *link) in acpi_pci_link_get_possible() argument
160 status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS, in acpi_pci_link_get_possible()
161 acpi_pci_link_check_possible, link); in acpi_pci_link_get_possible()
163 acpi_handle_debug(link->device->handle, "_PRS not present or invalid"); in acpi_pci_link_get_possible()
169 link->irq.possible_count)); in acpi_pci_link_get_possible()
225 * Run _CRS and set link->irq.active
231 static int acpi_pci_link_get_current(struct acpi_pci_link *link) in acpi_pci_link_get_current() argument
237 link->irq.active = 0; in acpi_pci_link_get_current()
241 /* Query _STA, set link->device->status */ in acpi_pci_link_get_current()
242 result = acpi_bus_get_status(link->device); in acpi_pci_link_get_current()
248 if (!link->device->status.enabled) { in acpi_pci_link_get_current()
249 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link disabled\n")); in acpi_pci_link_get_current()
258 status = acpi_walk_resources(link->device->handle, METHOD_NAME__CRS, in acpi_pci_link_get_current()
271 link->irq.active = irq; in acpi_pci_link_get_current()
273 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link at IRQ %d \n", link->irq.active)); in acpi_pci_link_get_current()
279 static int acpi_pci_link_set(struct acpi_pci_link *link, int irq) in acpi_pci_link_set() argument
299 switch (link->irq.resource_type) { in acpi_pci_link_set()
303 resource->res.data.irq.triggering = link->irq.triggering; in acpi_pci_link_set()
305 link->irq.polarity; in acpi_pci_link_set()
306 if (link->irq.triggering == ACPI_EDGE_SENSITIVE) in acpi_pci_link_set()
321 link->irq.triggering; in acpi_pci_link_set()
323 link->irq.polarity; in acpi_pci_link_set()
324 if (link->irq.triggering == ACPI_EDGE_SENSITIVE) in acpi_pci_link_set()
334 printk(KERN_ERR PREFIX "Invalid Resource_type %d\n", link->irq.resource_type); in acpi_pci_link_set()
343 status = acpi_set_current_resources(link->device->handle, &buffer); in acpi_pci_link_set()
353 result = acpi_bus_get_status(link->device); in acpi_pci_link_set()
358 if (!link->device->status.enabled) { in acpi_pci_link_set()
361 acpi_device_name(link->device), in acpi_pci_link_set()
362 acpi_device_bid(link->device)); in acpi_pci_link_set()
365 /* Query _CRS, set link->irq.active */ in acpi_pci_link_set()
366 result = acpi_pci_link_get_current(link); in acpi_pci_link_set()
373 * set link->irq.active in acpi_pci_link_set()
375 if (link->irq.active != irq) { in acpi_pci_link_set()
382 acpi_device_name(link->device), in acpi_pci_link_set()
383 acpi_device_bid(link->device), link->irq.active, irq); in acpi_pci_link_set()
384 link->irq.active = irq; in acpi_pci_link_set()
387 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Set IRQ %d\n", link->irq.active)); in acpi_pci_link_set()
395 PCI Link IRQ Management
400 * Link Devices to move the PIRQs around to minimize sharing.
405 * if the BIOS doesn't set a Link Device active, ACPI needs to program it
420 * Since this heuristic can't tell the difference between a link
421 * that no device will attach to, vs. a link which may be shared
459 struct acpi_pci_link *link; in acpi_irq_pci_sharing_penalty() local
463 list_for_each_entry(link, &acpi_link_list, list) { in acpi_irq_pci_sharing_penalty()
465 * If a link is active, penalize its IRQ heavily in acpi_irq_pci_sharing_penalty()
468 if (link->irq.active && link->irq.active == irq) in acpi_irq_pci_sharing_penalty()
474 for (i = 0; i < link->irq.possible_count; i++) in acpi_irq_pci_sharing_penalty()
475 if (link->irq.possible[i] == irq) in acpi_irq_pci_sharing_penalty()
477 link->irq.possible_count; in acpi_irq_pci_sharing_penalty()
498 struct acpi_pci_link *link; in acpi_irq_penalty_init() local
504 list_for_each_entry(link, &acpi_link_list, list) { in acpi_irq_penalty_init()
510 if (link->irq.possible_count) { in acpi_irq_penalty_init()
513 link->irq.possible_count; in acpi_irq_penalty_init()
515 for (i = 0; i < link->irq.possible_count; i++) { in acpi_irq_penalty_init()
516 if (link->irq.possible[i] < ACPI_MAX_ISA_IRQS) in acpi_irq_penalty_init()
517 acpi_isa_irq_penalty[link->irq. in acpi_irq_penalty_init()
522 } else if (link->irq.active && in acpi_irq_penalty_init()
523 (link->irq.active < ACPI_MAX_ISA_IRQS)) { in acpi_irq_penalty_init()
524 acpi_isa_irq_penalty[link->irq.active] += in acpi_irq_penalty_init()
534 static int acpi_pci_link_allocate(struct acpi_pci_link *link) in acpi_pci_link_allocate() argument
539 if (link->irq.initialized) { in acpi_pci_link_allocate()
540 if (link->refcnt == 0) in acpi_pci_link_allocate()
541 /* This means the link is disabled but initialized */ in acpi_pci_link_allocate()
542 acpi_pci_link_set(link, link->irq.active); in acpi_pci_link_allocate()
549 for (i = 0; i < link->irq.possible_count; ++i) { in acpi_pci_link_allocate()
550 if (link->irq.active == link->irq.possible[i]) in acpi_pci_link_allocate()
556 if (i == link->irq.possible_count) { in acpi_pci_link_allocate()
559 " in _PRS\n", link->irq.active); in acpi_pci_link_allocate()
560 link->irq.active = 0; in acpi_pci_link_allocate()
566 if (link->irq.active) in acpi_pci_link_allocate()
567 irq = link->irq.active; in acpi_pci_link_allocate()
569 irq = link->irq.possible[link->irq.possible_count - 1]; in acpi_pci_link_allocate()
571 if (acpi_irq_balance || !link->irq.active) { in acpi_pci_link_allocate()
576 for (i = (link->irq.possible_count - 1); i >= 0; i--) { in acpi_pci_link_allocate()
578 acpi_irq_get_penalty(link->irq.possible[i])) in acpi_pci_link_allocate()
579 irq = link->irq.possible[i]; in acpi_pci_link_allocate()
585 acpi_device_name(link->device), in acpi_pci_link_allocate()
586 acpi_device_bid(link->device)); in acpi_pci_link_allocate()
590 /* Attempt to enable the link device at this IRQ. */ in acpi_pci_link_allocate()
591 if (acpi_pci_link_set(link, irq)) { in acpi_pci_link_allocate()
594 acpi_device_name(link->device), in acpi_pci_link_allocate()
595 acpi_device_bid(link->device)); in acpi_pci_link_allocate()
598 if (link->irq.active < ACPI_MAX_ISA_IRQS) in acpi_pci_link_allocate()
599 acpi_isa_irq_penalty[link->irq.active] += in acpi_pci_link_allocate()
603 acpi_device_name(link->device), in acpi_pci_link_allocate()
604 acpi_device_bid(link->device), link->irq.active); in acpi_pci_link_allocate()
607 link->irq.initialized = 1; in acpi_pci_link_allocate()
621 struct acpi_pci_link *link; in acpi_pci_link_allocate_irq() local
625 printk(KERN_ERR PREFIX "Invalid link device\n"); in acpi_pci_link_allocate_irq()
629 link = acpi_driver_data(device); in acpi_pci_link_allocate_irq()
630 if (!link) { in acpi_pci_link_allocate_irq()
631 printk(KERN_ERR PREFIX "Invalid link context\n"); in acpi_pci_link_allocate_irq()
635 /* TBD: Support multiple index (IRQ) entries per Link Device */ in acpi_pci_link_allocate_irq()
642 if (acpi_pci_link_allocate(link)) { in acpi_pci_link_allocate_irq()
647 if (!link->irq.active) { in acpi_pci_link_allocate_irq()
649 printk(KERN_ERR PREFIX "Link active IRQ is 0!\n"); in acpi_pci_link_allocate_irq()
652 link->refcnt++; in acpi_pci_link_allocate_irq()
656 *triggering = link->irq.triggering; in acpi_pci_link_allocate_irq()
658 *polarity = link->irq.polarity; in acpi_pci_link_allocate_irq()
660 *name = acpi_device_bid(link->device); in acpi_pci_link_allocate_irq()
662 "Link %s is referenced\n", in acpi_pci_link_allocate_irq()
663 acpi_device_bid(link->device))); in acpi_pci_link_allocate_irq()
664 return link->irq.active; in acpi_pci_link_allocate_irq()
668 * We don't change link's irq information here. After it is reenabled, we
674 struct acpi_pci_link *link; in acpi_pci_link_free_irq() local
679 printk(KERN_ERR PREFIX "Invalid link device\n"); in acpi_pci_link_free_irq()
683 link = acpi_driver_data(device); in acpi_pci_link_free_irq()
684 if (!link) { in acpi_pci_link_free_irq()
685 printk(KERN_ERR PREFIX "Invalid link context\n"); in acpi_pci_link_free_irq()
690 if (!link->irq.initialized) { in acpi_pci_link_free_irq()
692 printk(KERN_ERR PREFIX "Link isn't initialized\n"); in acpi_pci_link_free_irq()
697 * The Link reference count allows us to _DISable an unused link in acpi_pci_link_free_irq()
700 * which blindly restores the link state. in acpi_pci_link_free_irq()
705 link->refcnt--; in acpi_pci_link_free_irq()
708 "Link %s is dereferenced\n", in acpi_pci_link_free_irq()
709 acpi_device_bid(link->device))); in acpi_pci_link_free_irq()
711 if (link->refcnt == 0) in acpi_pci_link_free_irq()
712 acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL); in acpi_pci_link_free_irq()
715 return link->irq.active; in acpi_pci_link_free_irq()
726 struct acpi_pci_link *link; in acpi_pci_link_add() local
730 link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL); in acpi_pci_link_add()
731 if (!link) in acpi_pci_link_add()
734 link->device = device; in acpi_pci_link_add()
737 device->driver_data = link; in acpi_pci_link_add()
740 result = acpi_pci_link_get_possible(link); in acpi_pci_link_add()
744 /* query and set link->irq.active */ in acpi_pci_link_add()
745 acpi_pci_link_get_current(link); in acpi_pci_link_add()
749 for (i = 0; i < link->irq.possible_count; i++) { in acpi_pci_link_add()
750 if (link->irq.active == link->irq.possible[i]) { in acpi_pci_link_add()
751 printk(KERN_CONT " *%d", link->irq.possible[i]); in acpi_pci_link_add()
754 printk(KERN_CONT " %d", link->irq.possible[i]); in acpi_pci_link_add()
760 printk(KERN_CONT " *%d", link->irq.active); in acpi_pci_link_add()
762 if (!link->device->status.enabled) in acpi_pci_link_add()
767 list_add_tail(&link->list, &acpi_link_list); in acpi_pci_link_add()
775 kfree(link); in acpi_pci_link_add()
780 static int acpi_pci_link_resume(struct acpi_pci_link *link) in acpi_pci_link_resume() argument
782 if (link->refcnt && link->irq.active && link->irq.initialized) in acpi_pci_link_resume()
783 return (acpi_pci_link_set(link, link->irq.active)); in acpi_pci_link_resume()
790 struct acpi_pci_link *link; in irqrouter_resume() local
792 list_for_each_entry(link, &acpi_link_list, list) { in irqrouter_resume()
793 acpi_pci_link_resume(link); in irqrouter_resume()
799 struct acpi_pci_link *link; in acpi_pci_link_remove() local
801 link = acpi_driver_data(device); in acpi_pci_link_remove()
804 list_del(&link->list); in acpi_pci_link_remove()
807 kfree(link); in acpi_pci_link_remove()