Lines Matching full:link
2 * pci_link.c - ACPI PCI Interrupt Link Device Driver ($Revision: 34 $)
23 * 1. Support more than one IRQ resource entry per link device (index).
46 #define ACPI_PCI_LINK_DEVICE_NAME "PCI Interrupt Link"
67 * If a link is initialized, we never change its active and initialized
68 * later even the link is disable. Instead, we just repick the active irq
93 PCI Link Device Management
97 * set context (link) possible list from resource list
102 struct acpi_pci_link *link = context; in acpi_pci_link_check_possible() local
126 link->irq.possible[i] = p->interrupts[i]; in acpi_pci_link_check_possible()
127 link->irq.possible_count++; in acpi_pci_link_check_possible()
129 link->irq.triggering = p->triggering; in acpi_pci_link_check_possible()
130 link->irq.polarity = p->polarity; in acpi_pci_link_check_possible()
131 link->irq.resource_type = ACPI_RESOURCE_TYPE_IRQ; in acpi_pci_link_check_possible()
152 link->irq.possible[i] = p->interrupts[i]; in acpi_pci_link_check_possible()
153 link->irq.possible_count++; in acpi_pci_link_check_possible()
155 link->irq.triggering = p->triggering; in acpi_pci_link_check_possible()
156 link->irq.polarity = p->polarity; in acpi_pci_link_check_possible()
157 link->irq.resource_type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ; in acpi_pci_link_check_possible()
169 static int acpi_pci_link_get_possible(struct acpi_pci_link *link) in acpi_pci_link_get_possible() argument
173 status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS, in acpi_pci_link_get_possible()
174 acpi_pci_link_check_possible, link); in acpi_pci_link_get_possible()
176 acpi_handle_debug(link->device->handle, "_PRS not present or invalid"); in acpi_pci_link_get_possible()
182 link->irq.possible_count)); in acpi_pci_link_get_possible()
238 * Run _CRS and set link->irq.active
244 static int acpi_pci_link_get_current(struct acpi_pci_link *link) in acpi_pci_link_get_current() argument
250 link->irq.active = 0; in acpi_pci_link_get_current()
254 /* Query _STA, set link->device->status */ in acpi_pci_link_get_current()
255 result = acpi_bus_get_status(link->device); in acpi_pci_link_get_current()
261 if (!link->device->status.enabled) { in acpi_pci_link_get_current()
262 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link disabled\n")); in acpi_pci_link_get_current()
271 status = acpi_walk_resources(link->device->handle, METHOD_NAME__CRS, in acpi_pci_link_get_current()
284 link->irq.active = irq; in acpi_pci_link_get_current()
286 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link at IRQ %d \n", link->irq.active)); in acpi_pci_link_get_current()
292 static int acpi_pci_link_set(struct acpi_pci_link *link, int irq) in acpi_pci_link_set() argument
312 switch (link->irq.resource_type) { in acpi_pci_link_set()
316 resource->res.data.irq.triggering = link->irq.triggering; in acpi_pci_link_set()
318 link->irq.polarity; in acpi_pci_link_set()
319 if (link->irq.triggering == ACPI_EDGE_SENSITIVE) in acpi_pci_link_set()
334 link->irq.triggering; in acpi_pci_link_set()
336 link->irq.polarity; in acpi_pci_link_set()
337 if (link->irq.triggering == ACPI_EDGE_SENSITIVE) in acpi_pci_link_set()
347 printk(KERN_ERR PREFIX "Invalid Resource_type %d\n", link->irq.resource_type); in acpi_pci_link_set()
356 status = acpi_set_current_resources(link->device->handle, &buffer); in acpi_pci_link_set()
366 result = acpi_bus_get_status(link->device); in acpi_pci_link_set()
371 if (!link->device->status.enabled) { in acpi_pci_link_set()
374 acpi_device_name(link->device), in acpi_pci_link_set()
375 acpi_device_bid(link->device)); in acpi_pci_link_set()
378 /* Query _CRS, set link->irq.active */ in acpi_pci_link_set()
379 result = acpi_pci_link_get_current(link); in acpi_pci_link_set()
386 * set link->irq.active in acpi_pci_link_set()
388 if (link->irq.active != irq) { in acpi_pci_link_set()
395 acpi_device_name(link->device), in acpi_pci_link_set()
396 acpi_device_bid(link->device), link->irq.active, irq); in acpi_pci_link_set()
397 link->irq.active = irq; in acpi_pci_link_set()
400 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Set IRQ %d\n", link->irq.active)); in acpi_pci_link_set()
408 PCI Link IRQ Management
413 * Link Devices to move the PIRQs around to minimize sharing.
418 * if the BIOS doesn't set a Link Device active, ACPI needs to program it
433 * Since this heuristic can't tell the difference between a link
434 * that no device will attach to, vs. a link which may be shared
472 struct acpi_pci_link *link; in acpi_irq_pci_sharing_penalty() local
476 list_for_each_entry(link, &acpi_link_list, list) { in acpi_irq_pci_sharing_penalty()
478 * If a link is active, penalize its IRQ heavily in acpi_irq_pci_sharing_penalty()
481 if (link->irq.active && link->irq.active == irq) in acpi_irq_pci_sharing_penalty()
487 for (i = 0; i < link->irq.possible_count; i++) in acpi_irq_pci_sharing_penalty()
488 if (link->irq.possible[i] == irq) in acpi_irq_pci_sharing_penalty()
490 link->irq.possible_count; in acpi_irq_pci_sharing_penalty()
511 struct acpi_pci_link *link; in acpi_irq_penalty_init() local
517 list_for_each_entry(link, &acpi_link_list, list) { in acpi_irq_penalty_init()
523 if (link->irq.possible_count) { in acpi_irq_penalty_init()
526 link->irq.possible_count; in acpi_irq_penalty_init()
528 for (i = 0; i < link->irq.possible_count; i++) { in acpi_irq_penalty_init()
529 if (link->irq.possible[i] < ACPI_MAX_ISA_IRQS) in acpi_irq_penalty_init()
530 acpi_isa_irq_penalty[link->irq. in acpi_irq_penalty_init()
535 } else if (link->irq.active && in acpi_irq_penalty_init()
536 (link->irq.active < ACPI_MAX_ISA_IRQS)) { in acpi_irq_penalty_init()
537 acpi_isa_irq_penalty[link->irq.active] += in acpi_irq_penalty_init()
547 static int acpi_pci_link_allocate(struct acpi_pci_link *link) in acpi_pci_link_allocate() argument
552 if (link->irq.initialized) { in acpi_pci_link_allocate()
553 if (link->refcnt == 0) in acpi_pci_link_allocate()
554 /* This means the link is disabled but initialized */ in acpi_pci_link_allocate()
555 acpi_pci_link_set(link, link->irq.active); in acpi_pci_link_allocate()
562 for (i = 0; i < link->irq.possible_count; ++i) { in acpi_pci_link_allocate()
563 if (link->irq.active == link->irq.possible[i]) in acpi_pci_link_allocate()
569 if (i == link->irq.possible_count) { in acpi_pci_link_allocate()
572 " in _PRS\n", link->irq.active); in acpi_pci_link_allocate()
573 link->irq.active = 0; in acpi_pci_link_allocate()
579 if (link->irq.active) in acpi_pci_link_allocate()
580 irq = link->irq.active; in acpi_pci_link_allocate()
582 irq = link->irq.possible[link->irq.possible_count - 1]; in acpi_pci_link_allocate()
584 if (acpi_irq_balance || !link->irq.active) { in acpi_pci_link_allocate()
589 for (i = (link->irq.possible_count - 1); i >= 0; i--) { in acpi_pci_link_allocate()
591 acpi_irq_get_penalty(link->irq.possible[i])) in acpi_pci_link_allocate()
592 irq = link->irq.possible[i]; in acpi_pci_link_allocate()
598 acpi_device_name(link->device), in acpi_pci_link_allocate()
599 acpi_device_bid(link->device)); in acpi_pci_link_allocate()
603 /* Attempt to enable the link device at this IRQ. */ in acpi_pci_link_allocate()
604 if (acpi_pci_link_set(link, irq)) { in acpi_pci_link_allocate()
607 acpi_device_name(link->device), in acpi_pci_link_allocate()
608 acpi_device_bid(link->device)); in acpi_pci_link_allocate()
611 if (link->irq.active < ACPI_MAX_ISA_IRQS) in acpi_pci_link_allocate()
612 acpi_isa_irq_penalty[link->irq.active] += in acpi_pci_link_allocate()
616 acpi_device_name(link->device), in acpi_pci_link_allocate()
617 acpi_device_bid(link->device), link->irq.active); in acpi_pci_link_allocate()
620 link->irq.initialized = 1; in acpi_pci_link_allocate()
634 struct acpi_pci_link *link; in acpi_pci_link_allocate_irq() local
638 printk(KERN_ERR PREFIX "Invalid link device\n"); in acpi_pci_link_allocate_irq()
642 link = acpi_driver_data(device); in acpi_pci_link_allocate_irq()
643 if (!link) { in acpi_pci_link_allocate_irq()
644 printk(KERN_ERR PREFIX "Invalid link context\n"); in acpi_pci_link_allocate_irq()
648 /* TBD: Support multiple index (IRQ) entries per Link Device */ in acpi_pci_link_allocate_irq()
655 if (acpi_pci_link_allocate(link)) { in acpi_pci_link_allocate_irq()
660 if (!link->irq.active) { in acpi_pci_link_allocate_irq()
662 printk(KERN_ERR PREFIX "Link active IRQ is 0!\n"); in acpi_pci_link_allocate_irq()
665 link->refcnt++; in acpi_pci_link_allocate_irq()
669 *triggering = link->irq.triggering; in acpi_pci_link_allocate_irq()
671 *polarity = link->irq.polarity; in acpi_pci_link_allocate_irq()
673 *name = acpi_device_bid(link->device); in acpi_pci_link_allocate_irq()
675 "Link %s is referenced\n", in acpi_pci_link_allocate_irq()
676 acpi_device_bid(link->device))); in acpi_pci_link_allocate_irq()
677 return (link->irq.active); in acpi_pci_link_allocate_irq()
681 * We don't change link's irq information here. After it is reenabled, we
687 struct acpi_pci_link *link; in acpi_pci_link_free_irq() local
692 printk(KERN_ERR PREFIX "Invalid link device\n"); in acpi_pci_link_free_irq()
696 link = acpi_driver_data(device); in acpi_pci_link_free_irq()
697 if (!link) { in acpi_pci_link_free_irq()
698 printk(KERN_ERR PREFIX "Invalid link context\n"); in acpi_pci_link_free_irq()
703 if (!link->irq.initialized) { in acpi_pci_link_free_irq()
705 printk(KERN_ERR PREFIX "Link isn't initialized\n"); in acpi_pci_link_free_irq()
710 * The Link reference count allows us to _DISable an unused link in acpi_pci_link_free_irq()
713 * which blindly restores the link state. in acpi_pci_link_free_irq()
718 link->refcnt--; in acpi_pci_link_free_irq()
721 "Link %s is dereferenced\n", in acpi_pci_link_free_irq()
722 acpi_device_bid(link->device))); in acpi_pci_link_free_irq()
724 if (link->refcnt == 0) in acpi_pci_link_free_irq()
725 acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL); in acpi_pci_link_free_irq()
728 return (link->irq.active); in acpi_pci_link_free_irq()
739 struct acpi_pci_link *link; in acpi_pci_link_add() local
743 link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL); in acpi_pci_link_add()
744 if (!link) in acpi_pci_link_add()
747 link->device = device; in acpi_pci_link_add()
750 device->driver_data = link; in acpi_pci_link_add()
753 result = acpi_pci_link_get_possible(link); in acpi_pci_link_add()
757 /* query and set link->irq.active */ in acpi_pci_link_add()
758 acpi_pci_link_get_current(link); in acpi_pci_link_add()
762 for (i = 0; i < link->irq.possible_count; i++) { in acpi_pci_link_add()
763 if (link->irq.active == link->irq.possible[i]) { in acpi_pci_link_add()
764 printk(KERN_CONT " *%d", link->irq.possible[i]); in acpi_pci_link_add()
767 printk(KERN_CONT " %d", link->irq.possible[i]); in acpi_pci_link_add()
773 printk(KERN_CONT " *%d", link->irq.active); in acpi_pci_link_add()
775 if (!link->device->status.enabled) in acpi_pci_link_add()
780 list_add_tail(&link->list, &acpi_link_list); in acpi_pci_link_add()
788 kfree(link); in acpi_pci_link_add()
793 static int acpi_pci_link_resume(struct acpi_pci_link *link) in acpi_pci_link_resume() argument
795 if (link->refcnt && link->irq.active && link->irq.initialized) in acpi_pci_link_resume()
796 return (acpi_pci_link_set(link, link->irq.active)); in acpi_pci_link_resume()
803 struct acpi_pci_link *link; in irqrouter_resume() local
805 list_for_each_entry(link, &acpi_link_list, list) { in irqrouter_resume()
806 acpi_pci_link_resume(link); in irqrouter_resume()
812 struct acpi_pci_link *link; in acpi_pci_link_remove() local
814 link = acpi_driver_data(device); in acpi_pci_link_remove()
817 list_del(&link->list); in acpi_pci_link_remove()
820 kfree(link); in acpi_pci_link_remove()