Rev 1633 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1628 | 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 | |||
| 7 | |||
| 8 | #include "acpi_bus.h" |
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| 9 | |||
| 10 | |||
| 11 | |||
| 12 | |||
| 13 | |||
| 14 | |||
| 15 | struct list_head node; |
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| 16 | ACPI_HANDLE handle; |
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| 17 | }; |
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| 18 | |||
| 19 | |||
| 20 | {"PNP0A03", 0}, |
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| 21 | {"", 0}, |
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| 22 | }; |
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| 23 | |||
| 24 | |||
| 1633 | serge | 25 | |
| 1628 | serge | 26 | |
| 27 | |||
| 28 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge |
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| 29 | * @handle - the ACPI CA node in question. |
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| 30 | * |
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| 31 | * Note: we could make this API take a struct acpi_device * instead, but |
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| 32 | * for now, it's more convenient to operate on an acpi_handle. |
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| 33 | */ |
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| 34 | int acpi_is_root_bridge(ACPI_HANDLE handle) |
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| 35 | { |
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| 36 | int ret; |
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| 37 | struct acpi_device *device; |
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| 38 | |||
| 39 | |||
| 40 | if (ret) |
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| 41 | return 0; |
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| 42 | |||
| 43 | |||
| 44 | if (ret) |
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| 45 | return 0; |
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| 46 | else |
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| 47 | return 1; |
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| 48 | } |
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| 49 | |||
| 50 | |||
| 51 | |||
| 52 | { |
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| 53 | struct acpi_pci_root *root; |
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| 54 | |||
| 55 | |||
| 56 | if (root->device->handle == handle) |
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| 57 | return root; |
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| 58 | } |
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| 59 | return NULL; |
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| 60 | } |
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| 61 | |||
| 62 | |||
| 63 | |||
| 64 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev |
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| 65 | * @handle: the handle in question |
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| 66 | * |
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| 67 | * Given an ACPI CA handle, the desired PCI device is located in the |
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| 68 | * list of PCI devices. |
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| 69 | * |
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| 70 | * If the device is found, its reference count is increased and this |
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| 71 | * function returns a pointer to its data structure. The caller must |
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| 72 | * decrement the reference count by calling pci_dev_put(). |
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| 73 | * If no device is found, %NULL is returned. |
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| 74 | */ |
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| 75 | struct pci_dev *acpi_get_pci_dev(ACPI_HANDLE handle) |
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| 76 | { |
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| 77 | int dev, fn; |
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| 78 | unsigned long long adr; |
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| 79 | ACPI_STATUS status; |
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| 80 | ACPI_HANDLE phandle; |
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| 81 | struct pci_bus *pbus; |
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| 82 | struct pci_dev *pdev = NULL; |
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| 83 | struct acpi_handle_node *node, *tmp; |
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| 84 | struct acpi_pci_root *root; |
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| 85 | LIST_HEAD(device_list); |
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| 86 | |||
| 87 | |||
| 88 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. |
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| 89 | */ |
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| 90 | phandle = handle; |
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| 91 | while (!acpi_is_root_bridge(phandle)) { |
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| 92 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); |
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| 93 | if (!node) |
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| 94 | goto out; |
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| 95 | |||
| 96 | |||
| 97 | node->handle = phandle; |
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| 98 | list_add(&node->node, &device_list); |
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| 99 | |||
| 100 | |||
| 101 | if (ACPI_FAILURE(status)) |
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| 102 | goto out; |
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| 103 | } |
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| 104 | |||
| 105 | |||
| 106 | if (!root) |
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| 107 | goto out; |
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| 108 | |||
| 109 | |||
| 110 | |||
| 111 | |||
| 112 | * Now, walk back down the PCI device tree until we return to our |
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| 113 | * original handle. Assumes that everything between the PCI root |
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| 114 | * bridge and the device we're looking for must be a P2P bridge. |
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| 115 | */ |
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| 116 | list_for_each_entry(node, &device_list, node) { |
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| 117 | ACPI_HANDLE hnd = node->handle; |
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| 118 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); |
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| 119 | if (ACPI_FAILURE(status)) |
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| 120 | goto out; |
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| 121 | dev = (adr >> 16) & 0xffff; |
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| 122 | fn = adr & 0xffff; |
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| 123 | |||
| 124 | |||
| 125 | if (!pdev || hnd == handle) |
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| 126 | break; |
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| 127 | |||
| 128 | |||
| 129 | // pci_dev_put(pdev); |
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| 130 | |||
| 131 | |||
| 132 | * This function may be called for a non-PCI device that has a |
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| 133 | * PCI parent (eg. a disk under a PCI SATA controller). In that |
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| 134 | * case pdev->subordinate will be NULL for the parent. |
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| 135 | */ |
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| 136 | if (!pbus) { |
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| 137 | dbgprintf("Not a PCI-to-PCI bridge\n"); |
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| 138 | pdev = NULL; |
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| 139 | break; |
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| 140 | } |
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| 141 | } |
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| 142 | out: |
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| 143 | list_for_each_entry_safe(node, tmp, &device_list, node) |
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| 144 | kfree(node); |
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| 145 | |||
| 146 | |||
| 147 | } |
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| 148 | |||
| 149 | |||
| 1633 | serge | 150 | |
| 151 | { |
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| 152 | struct pci_dev *dev; |
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| 153 | |||
| 154 | |||
| 155 | { |
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| 156 | if(dev->pin) |
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| 1867 | serge | 157 | { |
| 158 | dbgprintf("PCI_%x_%x bus:%d devfn: %x pin %d bios irq: %d acpi irq: %d\n", |
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| 159 | dev->vendor, dev->device, dev->busnr, dev->devfn, |
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| 160 | dev->pin, dev->irq, acpi_get_irq(dev)); |
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| 161 | }; |
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| 162 | }; |
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| 1633 | serge | 163 | } |
| 164 | |||
| 165 | |||
| 166 | { |
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| 167 | struct acpi_pci_root *root; |
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| 168 | |||
| 169 | |||
| 170 | { |
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| 171 | struct pci_bus *pbus, *tbus; |
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| 172 | struct pci_dev *dev; |
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| 173 | |||
| 174 | |||
| 175 | |||
| 176 | |||
| 177 | { |
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| 178 | if(dev->pin) |
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| 1867 | serge | 179 | dbgprintf("PCI_%x_%x bus:%d devfn: %x pin %d bios irq: %d acpi irq: %d\n", |
| 180 | dev->vendor, dev->device, dev->busnr, dev->devfn, |
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| 181 | dev->pin, dev->irq, acpi_get_irq(dev)); |
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| 182 | }; |
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| 1633 | serge | 183 | |
| 184 | |||
| 185 | { |
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| 186 | print_bus_irqs(tbus); |
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| 187 | }; |
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| 188 | } |
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| 189 | }; |
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| 190 |