Rev 1633 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1627 | serge | 1 | |
| 2 | #include |
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| 3 | #include |
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| 4 | #include |
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| 5 | #include |
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| 6 | #include |
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| 7 | |||
| 8 | |||
| 9 | #include "acpi_bus.h" |
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| 10 | |||
| 11 | |||
| 12 | |||
| 13 | |||
| 14 | { |
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| 15 | struct list_head list; |
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| 16 | ACPI_PCI_ID id; |
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| 17 | u8 pin; |
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| 18 | ACPI_HANDLE link; |
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| 19 | u32 index; /* GSI, or link _CRS index */ |
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| 20 | }; |
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| 21 | |||
| 22 | |||
| 23 | static DEFINE_SPINLOCK(acpi_prt_lock); |
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| 24 | |||
| 25 | |||
| 26 | { |
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| 27 | return 'A' + pin - 1; |
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| 28 | } |
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| 29 | |||
| 30 | |||
| 31 | |||
| 32 | struct acpi_pci_routing_table *prt) |
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| 33 | { |
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| 34 | struct acpi_prt_entry *entry; |
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| 35 | |||
| 36 | |||
| 37 | if (!entry) |
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| 38 | return -ENOMEM; |
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| 39 | |||
| 40 | |||
| 41 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses |
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| 42 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert |
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| 43 | * it here. |
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| 44 | */ |
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| 45 | entry->id.Segment = pci_domain_nr(bus); |
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| 46 | entry->id.Bus = bus->number; |
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| 47 | entry->id.Device = (prt->Address >> 16) & 0xFFFF; |
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| 48 | entry->pin = prt->Pin + 1; |
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| 49 | |||
| 50 | |||
| 51 | |||
| 52 | |||
| 53 | |||
| 54 | |||
| 55 | * Type 1: Dynamic |
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| 56 | * --------------- |
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| 57 | * The 'source' field specifies the PCI interrupt link device used to |
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| 58 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' |
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| 59 | * indicates which resource descriptor in the resource template (of |
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| 60 | * the link device) this interrupt is allocated from. |
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| 61 | * |
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| 62 | * NOTE: Don't query the Link Device for IRQ information at this time |
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| 63 | * because Link Device enumeration may not have occurred yet |
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| 64 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI |
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| 65 | * namespace). |
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| 66 | */ |
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| 67 | if (prt->Source[0]) |
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| 68 | AcpiGetHandle(handle, prt->Source, &entry->link); |
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| 69 | |||
| 70 | |||
| 71 | * Type 2: Static |
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| 72 | * -------------- |
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| 73 | * The 'source' field is NULL, and the 'source_index' field specifies |
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| 74 | * the IRQ value, which is hardwired to specific interrupt inputs on |
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| 75 | * the interrupt controller. |
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| 76 | */ |
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| 77 | |||
| 78 | |||
| 79 | entry->id.Segment, entry->id.Bus, |
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| 80 | entry->id.Device, pin_name(entry->pin), |
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| 81 | prt->Source, entry->index); |
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| 82 | |||
| 83 | |||
| 84 | list_add_tail(&entry->list, &acpi_prt_list); |
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| 85 | spin_unlock(&acpi_prt_lock); |
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| 86 | |||
| 87 | |||
| 88 | } |
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| 89 | |||
| 90 | |||
| 91 | |||
| 92 | |||
| 93 | { |
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| 94 | ACPI_STATUS status; |
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| 95 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
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| 96 | struct acpi_pci_routing_table *entry; |
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| 97 | |||
| 98 | |||
| 99 | status = AcpiGetName(handle, ACPI_FULL_PATHNAME, &buffer); |
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| 100 | if (ACPI_FAILURE(status)) |
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| 101 | return -ENODEV; |
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| 102 | |||
| 103 | |||
| 104 | (char *) buffer.Pointer); |
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| 105 | |||
| 106 | |||
| 107 | |||
| 108 | |||
| 109 | buffer.Pointer = NULL; |
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| 110 | |||
| 111 | |||
| 112 | if (ACPI_FAILURE(status)) |
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| 113 | { |
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| 114 | dbgprintf("AcpiGetIrqRoutingTable failed " |
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| 115 | "evaluating _PRT [%s]\n",AcpiFormatException(status)); |
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| 116 | kfree(buffer.Pointer); |
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| 117 | return -ENODEV; |
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| 118 | } |
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| 119 | |||
| 120 | |||
| 121 | while (entry && (entry->Length > 0)) { |
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| 122 | acpi_pci_irq_add_entry(handle, bus, entry); |
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| 123 | entry = (struct acpi_pci_routing_table *) |
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| 124 | ((unsigned long)entry + entry->Length); |
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| 125 | } |
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| 126 | |||
| 127 | |||
| 128 | return 0; |
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| 129 | } |
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| 130 |