| 29,6 → 29,32 |
|---|
| } |
| |
| |
| /* -------------------------------------------------------------------------- |
| PCI IRQ Routing Table (PRT) Support |
| -------------------------------------------------------------------------- */ |
| |
| static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
| int pin) |
| { |
| struct acpi_prt_entry *entry; |
| int segment = pci_domain_nr(dev->bus); |
| int bus = dev->bus->number; |
| int device = PCI_SLOT(dev->devfn); |
| |
| spin_lock(&acpi_prt_lock); |
| list_for_each_entry(entry, &acpi_prt_list, list) { |
| if ((segment == entry->id.Segment) |
| && (bus == entry->id.Bus) |
| && (device == entry->id.Device) |
| && (pin == entry->pin)) { |
| spin_unlock(&acpi_prt_lock); |
| return entry; |
| } |
| } |
| spin_unlock(&acpi_prt_lock); |
| return NULL; |
| } |
| |
| static int acpi_pci_irq_add_entry(ACPI_HANDLE handle, struct pci_bus *bus, |
| struct acpi_pci_routing_table *prt) |
| { |
| 129,3 → 155,454 |
|---|
| return 0; |
| } |
| |
| static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
| { |
| struct acpi_prt_entry *entry; |
| struct pci_dev *bridge; |
| u8 bridge_pin, orig_pin = pin; |
| |
| entry = acpi_pci_irq_find_prt_entry(dev, pin); |
| if (entry) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
| pci_name(dev), pin_name(pin))); |
| return entry; |
| } |
| |
| /* |
| * Attempt to derive an IRQ for this device from a parent bridge's |
| * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). |
| */ |
| bridge = dev->bus->self; |
| while (bridge) |
| { |
| pin = pci_swizzle_interrupt_pin(dev, pin); |
| |
| if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { |
| /* PC card has the same IRQ as its cardbridge */ |
| bridge_pin = bridge->pin; |
| if (!bridge_pin) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "No interrupt pin configured for device %s\n", |
| pci_name(bridge))); |
| return NULL; |
| } |
| pin = bridge_pin; |
| } |
| |
| entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
| if (entry) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Derived GSI for %s INT %c from %s\n", |
| pci_name(dev), pin_name(orig_pin), |
| pci_name(bridge))); |
| return entry; |
| } |
| |
| dev = bridge; |
| bridge = dev->bus->self; |
| } |
| |
| dbgprintf("can't derive routing for PCI INT %c\n", |
| pin_name(orig_pin)); |
| return NULL; |
| } |
| |
| |
| int acpi_get_irq(struct pci_dev *dev) |
| { |
| struct acpi_prt_entry *entry; |
| int gsi = -1; |
| u8 pin; |
| |
| int triggering = ACPI_LEVEL_SENSITIVE; |
| int polarity = ACPI_ACTIVE_LOW; |
| |
| char *link = NULL; |
| char link_desc[16]; |
| int rc; |
| |
| pin = dev->pin; |
| if (!pin) { |
| dbgprintf(("No interrupt pin configured for device %s\n", |
| pci_name(dev))); |
| return 0; |
| } |
| |
| entry = acpi_pci_irq_lookup(dev, pin); |
| if (!entry) { |
| /* |
| * IDE legacy mode controller IRQs are magic. Why do compat |
| * extensions always make such a nasty mess. |
| */ |
| if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && |
| (dev->class & 0x05) == 0) |
| return 0; |
| } |
| |
| if (entry) |
| { |
| if (entry->link) |
| { |
| gsi = acpi_pci_link_allocate_irq(entry->link, |
| entry->index, |
| &triggering, &polarity, |
| &link); |
| // dbgprintf("link not implemen\n"); |
| } |
| else |
| gsi = entry->index; |
| } else |
| gsi = -1; |
| |
| #if 0 |
| |
| /* |
| * No IRQ known to the ACPI subsystem - maybe the BIOS / |
| * driver reported one, then use it. Exit in any case. |
| */ |
| if (gsi < 0) { |
| u32 dev_gsi; |
| dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
| /* Interrupt Line values above 0xF are forbidden */ |
| if (dev->irq > 0 && (dev->irq <= 0xF) && |
| (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) { |
| printk(" - using ISA IRQ %d\n", dev->irq); |
| acpi_register_gsi(&dev->dev, dev_gsi, |
| ACPI_LEVEL_SENSITIVE, |
| ACPI_ACTIVE_LOW); |
| return 0; |
| } else { |
| printk("\n"); |
| return 0; |
| } |
| } |
| |
| rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity); |
| if (rc < 0) { |
| dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
| pin_name(pin)); |
| return rc; |
| } |
| dev->irq = rc; |
| |
| if (link) |
| snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
| else |
| link_desc[0] = '\0'; |
| |
| dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
| pin_name(pin), link_desc, gsi, |
| (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
| (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); |
| #endif |
| |
| return gsi; |
| } |
| |
| |
| #define ACPI_PCI_LINK_MAX_POSSIBLE 16 |
| |
| /* |
| * If a link is initialized, we never change its active and initialized |
| * later even the link is disable. Instead, we just repick the active irq |
| */ |
| struct acpi_pci_link_irq { |
| u8 active; /* Current IRQ */ |
| u8 triggering; /* All IRQs */ |
| u8 polarity; /* All IRQs */ |
| u8 resource_type; |
| u8 possible_count; |
| u8 possible[ACPI_PCI_LINK_MAX_POSSIBLE]; |
| u8 initialized:1; |
| u8 reserved:7; |
| }; |
| |
| struct acpi_pci_link { |
| struct list_head list; |
| struct acpi_device *device; |
| struct acpi_pci_link_irq irq; |
| int refcnt; |
| }; |
| |
| static LIST_HEAD(acpi_link_list); |
| static DEFINE_MUTEX(acpi_link_lock); |
| |
| |
| static int acpi_pci_link_set(struct acpi_pci_link *link, int irq) |
| { |
| int result; |
| ACPI_STATUS status; |
| struct { |
| struct acpi_resource res; |
| struct acpi_resource end; |
| } *resource; |
| |
| ACPI_BUFFER buffer = { 0, NULL }; |
| |
| if (!irq) |
| return -EINVAL; |
| |
| resource = kzalloc(sizeof(*resource) + 1, GFP_KERNEL); |
| if (!resource) |
| return -ENOMEM; |
| |
| buffer.Length = sizeof(*resource) + 1; |
| buffer.Pointer = resource; |
| |
| switch (link->irq.resource_type) { |
| case ACPI_RESOURCE_TYPE_IRQ: |
| resource->res.Type = ACPI_RESOURCE_TYPE_IRQ; |
| resource->res.Length = sizeof(struct acpi_resource); |
| resource->res.Data.Irq.Triggering = link->irq.triggering; |
| resource->res.Data.Irq.Polarity = |
| link->irq.polarity; |
| if (link->irq.triggering == ACPI_EDGE_SENSITIVE) |
| resource->res.Data.Irq.Sharable = |
| ACPI_EXCLUSIVE; |
| else |
| resource->res.Data.Irq.Sharable = ACPI_SHARED; |
| resource->res.Data.Irq.InterruptCount = 1; |
| resource->res.Data.Irq.Interrupts[0] = irq; |
| break; |
| |
| case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
| resource->res.Type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ; |
| resource->res.Length = sizeof(struct acpi_resource); |
| resource->res.Data.ExtendedIrq.ProducerConsumer = |
| ACPI_CONSUMER; |
| resource->res.Data.ExtendedIrq.Triggering = |
| link->irq.triggering; |
| resource->res.Data.ExtendedIrq.Polarity = |
| link->irq.polarity; |
| if (link->irq.triggering == ACPI_EDGE_SENSITIVE) |
| resource->res.Data.Irq.Sharable = |
| ACPI_EXCLUSIVE; |
| else |
| resource->res.Data.Irq.Sharable = ACPI_SHARED; |
| resource->res.Data.ExtendedIrq.InterruptCount = 1; |
| resource->res.Data.ExtendedIrq.Interrupts[0] = irq; |
| /* ignore resource_source, it's optional */ |
| break; |
| default: |
| printk(KERN_ERR PREFIX "Invalid Resource_type %d\n", link->irq.resource_type); |
| result = -EINVAL; |
| goto end; |
| |
| } |
| resource->end.Type = ACPI_RESOURCE_TYPE_END_TAG; |
| |
| #if 0 |
| /* Attempt to set the resource */ |
| status = acpi_set_current_resources(link->device->handle, &buffer); |
| |
| /* check for total failure */ |
| if (ACPI_FAILURE(status)) { |
| dbgprintf("%s failure Evaluating _SRS", __FUNCTION__); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| /* Query _STA, set device->status */ |
| result = acpi_bus_get_status(link->device); |
| if (result) { |
| printk(KERN_ERR PREFIX "Unable to read status\n"); |
| goto end; |
| } |
| if (!link->device->status.enabled) { |
| printk(KERN_WARNING PREFIX |
| "%s [%s] disabled and referenced, BIOS bug\n", |
| acpi_device_name(link->device), |
| acpi_device_bid(link->device)); |
| } |
| |
| /* Query _CRS, set link->irq.active */ |
| result = acpi_pci_link_get_current(link); |
| if (result) { |
| goto end; |
| } |
| |
| /* |
| * Is current setting not what we set? |
| * set link->irq.active |
| */ |
| if (link->irq.active != irq) { |
| /* |
| * policy: when _CRS doesn't return what we just _SRS |
| * assume _SRS worked and override _CRS value. |
| */ |
| printk(KERN_WARNING PREFIX |
| "%s [%s] BIOS reported IRQ %d, using IRQ %d\n", |
| acpi_device_name(link->device), |
| acpi_device_bid(link->device), link->irq.active, irq); |
| link->irq.active = irq; |
| } |
| #endif |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Set IRQ %d\n", link->irq.active)); |
| |
| end: |
| kfree(resource); |
| return result; |
| } |
| |
| |
| |
| #define ACPI_MAX_IRQS 256 |
| #define ACPI_MAX_ISA_IRQ 16 |
| |
| #define PIRQ_PENALTY_PCI_AVAILABLE (0) |
| #define PIRQ_PENALTY_PCI_POSSIBLE (16*16) |
| #define PIRQ_PENALTY_PCI_USING (16*16*16) |
| #define PIRQ_PENALTY_ISA_TYPICAL (16*16*16*16) |
| #define PIRQ_PENALTY_ISA_USED (16*16*16*16*16) |
| #define PIRQ_PENALTY_ISA_ALWAYS (16*16*16*16*16*16) |
| |
| static int acpi_irq_penalty[ACPI_MAX_IRQS] = { |
| PIRQ_PENALTY_ISA_ALWAYS, /* IRQ0 timer */ |
| PIRQ_PENALTY_ISA_ALWAYS, /* IRQ1 keyboard */ |
| PIRQ_PENALTY_ISA_ALWAYS, /* IRQ2 cascade */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ3 serial */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ4 serial */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ5 sometimes SoundBlaster */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ6 */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ7 parallel, spurious */ |
| PIRQ_PENALTY_ISA_TYPICAL, /* IRQ8 rtc, sometimes */ |
| PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ9 PCI, often acpi */ |
| PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ10 PCI */ |
| PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ11 PCI */ |
| PIRQ_PENALTY_ISA_USED, /* IRQ12 mouse */ |
| PIRQ_PENALTY_ISA_USED, /* IRQ13 fpe, sometimes */ |
| PIRQ_PENALTY_ISA_USED, /* IRQ14 ide0 */ |
| PIRQ_PENALTY_ISA_USED, /* IRQ15 ide1 */ |
| /* >IRQ15 */ |
| }; |
| |
| |
| |
| |
| static int acpi_irq_balance = 0; |
| |
| static int acpi_pci_link_allocate(struct acpi_pci_link *link) |
| { |
| int irq; |
| int i; |
| |
| if (link->irq.initialized) { |
| if (link->refcnt == 0) |
| /* This means the link is disabled but initialized */ |
| acpi_pci_link_set(link, link->irq.active); |
| return 0; |
| } |
| |
| /* |
| * search for active IRQ in list of possible IRQs. |
| */ |
| for (i = 0; i < link->irq.possible_count; ++i) { |
| if (link->irq.active == link->irq.possible[i]) |
| break; |
| } |
| /* |
| * forget active IRQ that is not in possible list |
| */ |
| if (i == link->irq.possible_count) { |
| printk(KERN_WARNING PREFIX "_CRS %d not found" |
| " in _PRS\n", link->irq.active); |
| link->irq.active = 0; |
| } |
| |
| /* |
| * if active found, use it; else pick entry from end of possible list. |
| */ |
| if (link->irq.active) |
| irq = link->irq.active; |
| else |
| irq = link->irq.possible[link->irq.possible_count - 1]; |
| |
| if (acpi_irq_balance || !link->irq.active) { |
| /* |
| * Select the best IRQ. This is done in reverse to promote |
| * the use of IRQs 9, 10, 11, and >15. |
| */ |
| for (i = (link->irq.possible_count - 1); i >= 0; i--) { |
| if (acpi_irq_penalty[irq] > |
| acpi_irq_penalty[link->irq.possible[i]]) |
| irq = link->irq.possible[i]; |
| } |
| } |
| |
| /* Attempt to enable the link device at this IRQ. */ |
| if (acpi_pci_link_set(link, irq)) { |
| printk(KERN_ERR PREFIX "Unable to set IRQ for %s [%s]. " |
| "Try pci=noacpi or acpi=off\n", |
| acpi_device_name(link->device), |
| acpi_device_bid(link->device)); |
| return -ENODEV; |
| } else { |
| acpi_irq_penalty[link->irq.active] += PIRQ_PENALTY_PCI_USING; |
| printk(KERN_WARNING PREFIX "%s [%s] enabled at IRQ %d\n", |
| acpi_device_name(link->device), |
| acpi_device_bid(link->device), link->irq.active); |
| } |
| |
| link->irq.initialized = 1; |
| return 0; |
| } |
| |
| |
| /* |
| * acpi_pci_link_allocate_irq |
| * success: return IRQ >= 0 |
| * failure: return -1 |
| */ |
| int acpi_pci_link_allocate_irq(ACPI_HANDLE handle, int index, |
| int *triggering, int *polarity, char **name) |
| { |
| int result; |
| struct acpi_device *device; |
| struct acpi_pci_link *link; |
| |
| result = acpi_bus_get_device(handle, &device); |
| if (result) { |
| printk(KERN_ERR PREFIX "Invalid link device\n"); |
| return -1; |
| } |
| |
| link = acpi_driver_data(device); |
| if (!link) { |
| printk(KERN_ERR PREFIX "Invalid link context\n"); |
| return -1; |
| } |
| |
| /* TBD: Support multiple index (IRQ) entries per Link Device */ |
| if (index) { |
| printk(KERN_ERR PREFIX "Invalid index %d\n", index); |
| return -1; |
| } |
| |
| mutex_lock(&acpi_link_lock); |
| if (acpi_pci_link_allocate(link)) { |
| mutex_unlock(&acpi_link_lock); |
| return -1; |
| } |
| |
| if (!link->irq.active) { |
| mutex_unlock(&acpi_link_lock); |
| printk(KERN_ERR PREFIX "Link active IRQ is 0!\n"); |
| return -1; |
| } |
| link->refcnt++; |
| mutex_unlock(&acpi_link_lock); |
| |
| if (triggering) |
| *triggering = link->irq.triggering; |
| if (polarity) |
| *polarity = link->irq.polarity; |
| if (name) |
| *name = acpi_device_bid(link->device); |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Link %s is referenced\n", |
| acpi_device_bid(link->device))); |
| return (link->irq.active); |
| } |
| |
| |