diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/pci_bind.c | 90 | ||||
| -rw-r--r-- | drivers/acpi/pci_irq.c | 472 |
2 files changed, 168 insertions, 394 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c index 4b252ea0e95..95650f83ce2 100644 --- a/drivers/acpi/pci_bind.c +++ b/drivers/acpi/pci_bind.c @@ -99,7 +99,7 @@ acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id) */ ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Device %s has PCI address %02x:%02x:%02x.%02x\n", + "Device %s has PCI address %04x:%02x:%02x.%d\n", acpi_device_bid(device), id->segment, id->bus, id->device, id->function)); @@ -111,12 +111,11 @@ EXPORT_SYMBOL(acpi_get_pci_id); int acpi_pci_bind(struct acpi_device *device) { int result = 0; - acpi_status status = AE_OK; - struct acpi_pci_data *data = NULL; - struct acpi_pci_data *pdata = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; - acpi_handle handle = NULL; + acpi_status status; + struct acpi_pci_data *data; + struct acpi_pci_data *pdata; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + acpi_handle handle; struct pci_dev *dev; struct pci_bus *bus; @@ -124,21 +123,18 @@ int acpi_pci_bind(struct acpi_device *device) if (!device || !device->parent) return -EINVAL; - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; - data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); - if (!data) { - kfree(pathname); + if (!data) return -ENOMEM; + + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) { + kfree(data); + return -ENODEV; } - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n", - pathname)); + (char *)buffer.pointer)); /* * Segment & Bus @@ -166,7 +162,7 @@ int acpi_pci_bind(struct acpi_device *device) data->id.device = device->pnp.bus_address >> 16; data->id.function = device->pnp.bus_address & 0xFFFF; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n", + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n", data->id.segment, data->id.bus, data->id.device, data->id.function)); @@ -196,7 +192,7 @@ int acpi_pci_bind(struct acpi_device *device) } if (!data->dev) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Device %02x:%02x:%02x.%02x not present in PCI namespace\n", + "Device %04x:%02x:%02x.%d not present in PCI namespace\n", data->id.segment, data->id.bus, data->id.device, data->id.function)); result = -ENODEV; @@ -204,7 +200,7 @@ int acpi_pci_bind(struct acpi_device *device) } if (!data->dev->bus) { printk(KERN_ERR PREFIX - "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n", + "Device %04x:%02x:%02x.%d has invalid 'bus' field\n", data->id.segment, data->id.bus, data->id.device, data->id.function); result = -ENODEV; @@ -219,7 +215,7 @@ int acpi_pci_bind(struct acpi_device *device) */ if (data->dev->subordinate) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Device %02x:%02x:%02x.%02x is a PCI bridge\n", + "Device %04x:%02x:%02x.%d is a PCI bridge\n", data->id.segment, data->id.bus, data->id.device, data->id.function)); data->bus = data->dev->subordinate; @@ -262,7 +258,7 @@ int acpi_pci_bind(struct acpi_device *device) } end: - kfree(pathname); + kfree(buffer.pointer); if (result) kfree(data); @@ -272,25 +268,21 @@ int acpi_pci_bind(struct acpi_device *device) static int acpi_pci_unbind(struct acpi_device *device) { int result = 0; - acpi_status status = AE_OK; - struct acpi_pci_data *data = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; + acpi_status status; + struct acpi_pci_data *data; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; if (!device || !device->parent) return -EINVAL; - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", - pathname)); - kfree(pathname); + (char *) buffer.pointer)); + kfree(buffer.pointer); status = acpi_get_data(device->handle, acpi_pci_data_handler, @@ -322,50 +314,44 @@ acpi_pci_bind_root(struct acpi_device *device, struct acpi_pci_id *id, struct pci_bus *bus) { int result = 0; - acpi_status status = AE_OK; + acpi_status status; struct acpi_pci_data *data = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; - - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; - - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; if (!device || !id || !bus) { - kfree(pathname); return -EINVAL; } data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); - if (!data) { - kfree(pathname); + if (!data) return -ENOMEM; - } data->id = *id; data->bus = bus; device->ops.bind = acpi_pci_bind; device->ops.unbind = acpi_pci_unbind; - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) { + kfree (data); + return -ENODEV; + } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to " - "%02x:%02x\n", pathname, id->segment, id->bus)); + "%04x:%02x\n", (char *)buffer.pointer, + id->segment, id->bus)); status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Unable to attach ACPI-PCI context to device %s", - pathname)); + (char *)buffer.pointer)); result = -ENODEV; goto end; } end: - kfree(pathname); + kfree(buffer.pointer); if (result != 0) kfree(data); diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index bf79d83bdfb..891bdf6679f 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -4,6 +4,8 @@ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> + * (c) Copyright 2008 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * @@ -41,29 +43,36 @@ #define _COMPONENT ACPI_PCI_COMPONENT ACPI_MODULE_NAME("pci_irq"); -static struct acpi_prt_list acpi_prt; +struct acpi_prt_entry { + struct list_head list; + struct acpi_pci_id id; + u8 pin; + acpi_handle link; + u32 index; /* GSI, or link _CRS index */ +}; + +static LIST_HEAD(acpi_prt_list); static DEFINE_SPINLOCK(acpi_prt_lock); +static inline char pin_name(int pin) +{ + return 'A' + pin - 1; +} + /* -------------------------------------------------------------------------- PCI IRQ Routing Table (PRT) Support -------------------------------------------------------------------------- */ -static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment, - int bus, - int device, int pin) +static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, + int pin) { - struct acpi_prt_entry *entry = NULL; - - if (!acpi_prt.count) - return NULL; + struct acpi_prt_entry *entry; + int segment = pci_domain_nr(dev->bus); + int bus = dev->bus->number; + int device = PCI_SLOT(dev->devfn); - /* - * Parse through all PRT entries looking for a match on the specified - * PCI device's segment, bus, device, and pin (don't care about func). - * - */ spin_lock(&acpi_prt_lock); - list_for_each_entry(entry, &acpi_prt.entries, node) { + list_for_each_entry(entry, &acpi_prt_list, list) { if ((segment == entry->id.segment) && (bus == entry->id.bus) && (device == entry->id.device) @@ -72,7 +81,6 @@ static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment, return entry; } } - spin_unlock(&acpi_prt_lock); return NULL; } @@ -124,25 +132,27 @@ struct prt_quirk { char *actual_source; }; +#define PCI_INTX_PIN(c) (c - 'A' + 1) + /* * These systems have incorrect _PRT entries. The BIOS claims the PCI * interrupt at the listed segment/bus/device/pin is connected to the first * link device, but it is actually connected to the second. */ static struct prt_quirk prt_quirks[] = { - { medion_md9580, 0, 0, 9, 'A', + { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), "\\_SB_.PCI0.ISA_.LNKA", "\\_SB_.PCI0.ISA_.LNKB"}, - { dell_optiplex, 0, 0, 0xd, 'A', + { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), "\\_SB_.LNKB", "\\_SB_.LNKA"}, - { hp_t5710, 0, 0, 1, 'A', + { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), "\\_SB_.PCI0.LNK1", "\\_SB_.PCI0.LNK3"}, }; -static void -do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt) +static void do_prt_fixups(struct acpi_prt_entry *entry, + struct acpi_pci_routing_table *prt) { int i; struct prt_quirk *quirk; @@ -158,42 +168,43 @@ do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt) entry->id.segment == quirk->segment && entry->id.bus == quirk->bus && entry->id.device == quirk->device && - entry->pin + 'A' == quirk->pin && + entry->pin == quirk->pin && !strcmp(prt->source, quirk->source) && strlen(prt->source) >= strlen(quirk->actual_source)) { printk(KERN_WARNING PREFIX "firmware reports " "%04x:%02x:%02x PCI INT %c connected to %s; " "changing to %s\n", entry->id.segment, entry->id.bus, - entry->id.device, 'A' + entry->pin, + entry->id.device, pin_name(entry->pin), prt->source, quirk->actual_source); strcpy(prt->source, quirk->actual_source); } } } -static int -acpi_pci_irq_add_entry(acpi_handle handle, - int segment, int bus, struct acpi_pci_routing_table *prt) +static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus, + struct acpi_pci_routing_table *prt) { - struct acpi_prt_entry *entry = NULL; - - - if (!prt) - return -EINVAL; + struct acpi_prt_entry *entry; entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); if (!entry) return -ENOMEM; + /* + * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses + * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert + * it here. + */ entry->id.segment = segment; entry->id.bus = bus; entry->id.device = (prt->address >> 16) & 0xFFFF; - entry->id.function = prt->address & 0xFFFF; - entry->pin = prt->pin; + entry->pin = prt->pin + 1; do_prt_fixups(entry, prt); + entry->index = prt->source_index; + /* * Type 1: Dynamic * --------------- @@ -207,10 +218,9 @@ acpi_pci_irq_add_entry(acpi_handle handle, * (e.g. exists somewhere 'below' this _PRT entry in the ACPI * namespace). */ - if (prt->source[0]) { - acpi_get_handle(handle, prt->source, &entry->link.handle); - entry->link.index = prt->source_index; - } + if (prt->source[0]) + acpi_get_handle(handle, prt->source, &entry->link); + /* * Type 2: Static * -------------- @@ -218,84 +228,38 @@ acpi_pci_irq_add_entry(acpi_handle handle, * the IRQ value, which is hardwired to specific interrupt inputs on * the interrupt controller. */ - else - entry->link.index = prt->source_index; ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, - " %02X:%02X:%02X[%c] -> %s[%d]\n", + " %04x:%02x:%02x[%c] -> %s[%d]\n", entry->id.segment, entry->id.bus, - entry->id.device, ('A' + entry->pin), prt->source, - entry->link.index)); + entry->id.device, pin_name(entry->pin), + prt->source, entry->index)); spin_lock(&acpi_prt_lock); - list_add_tail(&entry->node, &acpi_prt.entries); - acpi_prt.count++; + list_add_tail(&entry->list, &acpi_prt_list); spin_unlock(&acpi_prt_lock); return 0; } -static void -acpi_pci_irq_del_entry(int segment, int bus, struct acpi_prt_entry *entry) -{ - if (segment == entry->id.segment && bus == entry->id.bus) { - acpi_prt.count--; - list_del(&entry->node); - kfree(entry); - } -} - int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) { - acpi_status status = AE_OK; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; - struct acpi_pci_routing_table *prt = NULL; - struct acpi_pci_routing_table *entry = NULL; - static int first_time = 1; - - - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; - - if (first_time) { - acpi_prt.count = 0; - INIT_LIST_HEAD(&acpi_prt.entries); - first_time = 0; - } - - /* - * NOTE: We're given a 'handle' to the _PRT object's parent device - * (either a PCI root bridge or PCI-PCI bridge). - */ + acpi_status status; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_pci_routing_table *entry; - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; - acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); + /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ + status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", - pathname); + (char *) buffer.pointer); - /* - * Evaluate this _PRT and add its entries to our global list (acpi_prt). - */ + kfree(buffer.pointer); - buffer.length = 0; + buffer.length = ACPI_ALLOCATE_BUFFER; buffer.pointer = NULL; - kfree(pathname); - status = acpi_get_irq_routing_table(handle, &buffer); - if (status != AE_BUFFER_OVERFLOW) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", - acpi_format_exception(status))); - return -ENODEV; - } - - prt = kzalloc(buffer.length, GFP_KERNEL); - if (!prt) { - return -ENOMEM; - } - buffer.pointer = prt; status = acpi_get_irq_routing_table(handle, &buffer); if (ACPI_FAILURE(status)) { @@ -305,36 +269,30 @@ int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) return -ENODEV; } - entry = prt; - + entry = buffer.pointer; while (entry && (entry->length > 0)) { acpi_pci_irq_add_entry(handle, segment, bus, entry); entry = (struct acpi_pci_routing_table *) ((unsigned long)entry + entry->length); } - kfree(prt); - + kfree(buffer.pointer); return 0; } void acpi_pci_irq_del_prt(int segment, int bus) { - struct list_head *node = NULL, *n = NULL; - struct acpi_prt_entry *entry = NULL; - - if (!acpi_prt.count) { - return; - } + struct acpi_prt_entry *entry, *tmp; printk(KERN_DEBUG - "ACPI: Delete PCI Interrupt Routing Table for %x:%x\n", segment, - bus); + "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", + segment, bus); spin_lock(&acpi_prt_lock); - list_for_each_safe(node, n, &acpi_prt.entries) { - entry = list_entry(node, struct acpi_prt_entry, node); - - acpi_pci_irq_del_entry(segment, bus, entry); + list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { + if (segment == entry->id.segment && bus == entry->id.bus) { + list_del(&entry->list); + kfree(entry); + } } spin_unlock(&acpi_prt_lock); } @@ -342,162 +300,26 @@ void acpi_pci_irq_del_prt(int segment, int bus) /* -------------------------------------------------------------------------- PCI Interrupt Routing Support -------------------------------------------------------------------------- */ -typedef int (*irq_lookup_func) (struct acpi_prt_entry *, int *, int *, char **); - -static int -acpi_pci_allocate_irq(struct acpi_prt_entry *entry, - int *triggering, int *polarity, char **link) -{ - int irq; - - - if (entry->link.handle) { - irq = acpi_pci_link_allocate_irq(entry->link.handle, - entry->link.index, triggering, - polarity, link); - if (irq < 0) { - printk(KERN_WARNING PREFIX - "Invalid IRQ link routing entry\n"); - return -1; - } - } else { - irq = entry->link.index; - *triggering = ACPI_LEVEL_SENSITIVE; - *polarity = ACPI_ACTIVE_LOW; - } - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found IRQ %d\n", irq)); - return irq; -} - -static int -acpi_pci_free_irq(struct acpi_prt_entry *entry, - int *triggering, int *polarity, char **link) -{ - int irq; - - if (entry->link.handle) { - irq = acpi_pci_link_free_irq(entry->link.handle); - } else { - irq = entry->link.index; - } - return irq; -} - -#ifdef CONFIG_X86_IO_APIC -extern int noioapicquirk; - -static int bridge_has_boot_interrupt_variant(struct pci_bus *bus) +static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) { - struct pci_bus *bus_it; - - for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) { - if (!bus_it->self) - return 0; - - printk(KERN_INFO "vendor=%04x device=%04x\n", bus_it->self->vendor, - bus_it->self->device); - - if (bus_it->self->irq_reroute_variant) - return bus_it->self->irq_reroute_variant; - } - return 0; -} -#endif /* CONFIG_X86_IO_APIC */ - -/* - * acpi_pci_irq_lookup - * success: return IRQ >= 0 - * failure: return -1 - */ -static int -acpi_pci_irq_lookup(struct pci_bus *bus, - int device, - int pin, - int *triggering, - int *polarity, char **link, irq_lookup_func func) -{ - struct acpi_prt_entry *entry = NULL; - int segment = pci_domain_nr(bus); - int bus_nr = bus->number; - int ret; - - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Searching for PRT entry for %02x:%02x:%02x[%c]\n", - segment, bus_nr, device, ('A' + pin))); - - entry = acpi_pci_irq_find_prt_entry(segment, bus_nr, device, pin); - if (!entry) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PRT entry not found\n")); - return -1; - } - - ret = func(entry, triggering, polarity, link); - -#ifdef CONFIG_X86_IO_APIC - /* - * Some chipsets (e.g. intel 6700PXH) generate a legacy INTx when the - * IRQ entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel - * does during interrupt handling). When this INTx generation cannot be - * disabled, we reroute these interrupts to their legacy equivalent to - * get rid of spurious interrupts. - */ - if (!noioapicquirk) { - switch (bridge_has_boot_interrupt_variant(bus)) { - case 0: - /* no rerouting necessary */ - break; - - case INTEL_IRQ_REROUTE_VARIANT: - /* - * Remap according to INTx routing table in 6700PXH - * specs, intel order number 302628-002, section - * 2.15.2. Other chipsets (80332, ...) have the same - * mapping and are handled here as well. - */ - printk(KERN_INFO "pci irq %d -> rerouted to legacy " - "irq %d\n", ret, (ret % 4) + 16); - ret = (ret % 4) + 16; - break; - - default: - printk(KERN_INFO "not rerouting irq %d to legacy irq: " - "unknown mapping\n", ret); - break; - } + 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; } -#endif /* CONFIG_X86_IO_APIC */ - - return ret; -} - -/* - * acpi_pci_irq_derive - * success: return IRQ >= 0 - * failure: return < 0 - */ -static int -acpi_pci_irq_derive(struct pci_dev *dev, - int pin, - int *triggering, - int *polarity, char **link, irq_lookup_func func) -{ - struct pci_dev *bridge = dev; - int irq = -1; - u8 bridge_pin = 0, orig_pin = pin; - - - if (!dev) - return -EINVAL; /* * 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). */ - while (irq < 0 && bridge->bus->self) { - pin = (pin + PCI_SLOT(bridge->devfn)) % 4; - bridge = bridge->bus->self; + bridge = dev->bus->self; + while (bridge) { + pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1; if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { /* PC card has the same IRQ as its cardbridge */ @@ -506,50 +328,40 @@ acpi_pci_irq_derive(struct pci_dev *dev, ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No interrupt pin configured for device %s\n", pci_name(bridge))); - return -1; + return NULL; } - /* Pin is from 0 to 3 */ - bridge_pin--; pin = bridge_pin; } - irq = acpi_pci_irq_lookup(bridge->bus, PCI_SLOT(bridge->devfn), - pin, triggering, polarity, - link, func); - } + 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; + } - if (irq < 0) { - dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", - 'A' + orig_pin); - return -1; + dev = bridge; + bridge = dev->bus->self; } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derive IRQ %d for device %s from %s\n", - irq, pci_name(dev), pci_name(bridge))); - - return irq; + dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", + pin_name(orig_pin)); + return NULL; } -/* - * acpi_pci_irq_enable - * success: return 0 - * failure: return < 0 - */ - int acpi_pci_irq_enable(struct pci_dev *dev) { - int irq = 0; - u8 pin = 0; + struct acpi_prt_entry *entry; + int gsi; + u8 pin; int triggering = ACPI_LEVEL_SENSITIVE; int polarity = ACPI_ACTIVE_LOW; char *link = NULL; char link_desc[16]; int rc; - - if (!dev) - return -EINVAL; - pin = dev->pin; if (!pin) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -557,31 +369,9 @@ int acpi_pci_irq_enable(struct pci_dev *dev) pci_name(dev))); return 0; } - pin--; - - if (!dev->bus) { - dev_err(&dev->dev, "invalid (NULL) 'bus' field\n"); - return -ENODEV; - } - - /* - * First we check the PCI IRQ routing table (PRT) for an IRQ. PRT - * values override any BIOS-assigned IRQs set during boot. - */ - irq = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin, - &triggering, &polarity, &link, - acpi_pci_allocate_irq); - - /* - * If no PRT entry was found, we'll try to derive an IRQ from the - * device's parent bridge. - */ - if (irq < 0) - irq = acpi_pci_irq_derive(dev, pin, &triggering, - &polarity, &link, - acpi_pci_allocate_irq); - if (irq < 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. @@ -590,12 +380,24 @@ int acpi_pci_irq_enable(struct pci_dev *dev) (dev->class & 0x05) == 0) return 0; } + + if (entry) { + if (entry->link) + gsi = acpi_pci_link_allocate_irq(entry->link, + entry->index, + &triggering, &polarity, + &link); + else + gsi = entry->index; + } else + gsi = -1; + /* * No IRQ known to the ACPI subsystem - maybe the BIOS / * driver reported one, then use it. Exit in any case. */ - if (irq < 0) { - dev_warn(&dev->dev, "PCI INT %c: no GSI", 'A' + pin); + if (gsi < 0) { + 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)) { printk(" - using IRQ %d\n", dev->irq); @@ -608,10 +410,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev) } } - rc = acpi_register_gsi(irq, triggering, polarity); + rc = acpi_register_gsi(gsi, triggering, polarity); if (rc < 0) { dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", - 'A' + pin); + pin_name(pin)); return rc; } dev->irq = rc; @@ -622,7 +424,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev) link_desc[0] = '\0'; dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", - 'A' + pin, link_desc, irq, + pin_name(pin), link_desc, gsi, (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); @@ -636,42 +438,28 @@ void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) void acpi_pci_irq_disable(struct pci_dev *dev) { - int gsi = 0; - u8 pin = 0; - int triggering = ACPI_LEVEL_SENSITIVE; - int polarity = ACPI_ACTIVE_LOW; - - - if (!dev || !dev->bus) - return; + struct acpi_prt_entry *entry; + int gsi; + u8 pin; pin = dev->pin; if (!pin) return; - pin--; - /* - * First we check the PCI IRQ routing table (PRT) for an IRQ. - */ - gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin, - &triggering, &polarity, NULL, - acpi_pci_free_irq); - /* - * If no PRT entry was found, we'll try to derive an IRQ from the - * device's parent bridge. - */ - if (gsi < 0) - gsi = acpi_pci_irq_derive(dev, pin, - &triggering, &polarity, NULL, - acpi_pci_free_irq); - if (gsi < 0) + entry = acpi_pci_irq_lookup(dev, pin); + if (!entry) return; + if (entry->link) + gsi = acpi_pci_link_free_irq(entry->link); + else + gsi = entry->index; + /* * TBD: It might be worth clearing dev->irq by magic constant * (e.g. PCI_UNDEFINED_IRQ). */ - dev_info(&dev->dev, "PCI INT %c disabled\n", 'A' + pin); + dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); acpi_unregister_gsi(gsi); } |