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| 1 | #include |
1 | #include |
| 2 | #include |
2 | #include |
| 3 | #include |
3 | #include |
| 4 | #include |
4 | #include |
| 5 | #include |
5 | #include |
| 6 | 6 | ||
| 7 | #include "acpi.h" |
7 | #include "acpi.h" |
| 8 | #include "acpi_bus.h" |
8 | #include "acpi_bus.h" |
| 9 | 9 | ||
| 10 | 10 | ||
| 11 | #define PREFIX "ACPI: " |
11 | #define PREFIX "ACPI: " |
| 12 | 12 | ||
| 13 | 13 | ||
| 14 | struct acpi_handle_node { |
14 | struct acpi_handle_node { |
| 15 | struct list_head node; |
15 | struct list_head node; |
| 16 | ACPI_HANDLE handle; |
16 | ACPI_HANDLE handle; |
| 17 | }; |
17 | }; |
| 18 | 18 | ||
| 19 | static const struct acpi_device_ids root_device_ids[] = { |
19 | static const struct acpi_device_ids root_device_ids[] = { |
| 20 | {"PNP0A03", 0}, |
20 | {"PNP0A03", 0}, |
| 21 | {"", 0}, |
21 | {"", 0}, |
| 22 | }; |
22 | }; |
| 23 | 23 | ||
| 24 | static LIST_HEAD(acpi_pci_roots); |
24 | LIST_HEAD(acpi_pci_roots); |
| 25 | 25 | ||
| 26 | 26 | ||
| 27 | /** |
27 | /** |
| 28 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge |
28 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge |
| 29 | * @handle - the ACPI CA node in question. |
29 | * @handle - the ACPI CA node in question. |
| 30 | * |
30 | * |
| 31 | * Note: we could make this API take a struct acpi_device * instead, but |
31 | * Note: we could make this API take a struct acpi_device * instead, but |
| 32 | * for now, it's more convenient to operate on an acpi_handle. |
32 | * for now, it's more convenient to operate on an acpi_handle. |
| 33 | */ |
33 | */ |
| 34 | int acpi_is_root_bridge(ACPI_HANDLE handle) |
34 | int acpi_is_root_bridge(ACPI_HANDLE handle) |
| 35 | { |
35 | { |
| 36 | int ret; |
36 | int ret; |
| 37 | struct acpi_device *device; |
37 | struct acpi_device *device; |
| 38 | 38 | ||
| 39 | ret = acpi_bus_get_device(handle, &device); |
39 | ret = acpi_bus_get_device(handle, &device); |
| 40 | if (ret) |
40 | if (ret) |
| 41 | return 0; |
41 | return 0; |
| 42 | 42 | ||
| 43 | ret = acpi_match_device_ids(device, root_device_ids); |
43 | ret = acpi_match_device_ids(device, root_device_ids); |
| 44 | if (ret) |
44 | if (ret) |
| 45 | return 0; |
45 | return 0; |
| 46 | else |
46 | else |
| 47 | return 1; |
47 | return 1; |
| 48 | } |
48 | } |
| 49 | 49 | ||
| 50 | 50 | ||
| 51 | struct acpi_pci_root *acpi_pci_find_root(ACPI_HANDLE handle) |
51 | struct acpi_pci_root *acpi_pci_find_root(ACPI_HANDLE handle) |
| 52 | { |
52 | { |
| 53 | struct acpi_pci_root *root; |
53 | struct acpi_pci_root *root; |
| 54 | 54 | ||
| 55 | list_for_each_entry(root, &acpi_pci_roots, node) { |
55 | list_for_each_entry(root, &acpi_pci_roots, node) { |
| 56 | if (root->device->handle == handle) |
56 | if (root->device->handle == handle) |
| 57 | return root; |
57 | return root; |
| 58 | } |
58 | } |
| 59 | return NULL; |
59 | return NULL; |
| 60 | } |
60 | } |
| 61 | 61 | ||
| 62 | 62 | ||
| 63 | /** |
63 | /** |
| 64 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev |
64 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev |
| 65 | * @handle: the handle in question |
65 | * @handle: the handle in question |
| 66 | * |
66 | * |
| 67 | * Given an ACPI CA handle, the desired PCI device is located in the |
67 | * Given an ACPI CA handle, the desired PCI device is located in the |
| 68 | * list of PCI devices. |
68 | * list of PCI devices. |
| 69 | * |
69 | * |
| 70 | * If the device is found, its reference count is increased and this |
70 | * If the device is found, its reference count is increased and this |
| 71 | * function returns a pointer to its data structure. The caller must |
71 | * function returns a pointer to its data structure. The caller must |
| 72 | * decrement the reference count by calling pci_dev_put(). |
72 | * decrement the reference count by calling pci_dev_put(). |
| 73 | * If no device is found, %NULL is returned. |
73 | * If no device is found, %NULL is returned. |
| 74 | */ |
74 | */ |
| 75 | struct pci_dev *acpi_get_pci_dev(ACPI_HANDLE handle) |
75 | struct pci_dev *acpi_get_pci_dev(ACPI_HANDLE handle) |
| 76 | { |
76 | { |
| 77 | int dev, fn; |
77 | int dev, fn; |
| 78 | unsigned long long adr; |
78 | unsigned long long adr; |
| 79 | ACPI_STATUS status; |
79 | ACPI_STATUS status; |
| 80 | ACPI_HANDLE phandle; |
80 | ACPI_HANDLE phandle; |
| 81 | struct pci_bus *pbus; |
81 | struct pci_bus *pbus; |
| 82 | struct pci_dev *pdev = NULL; |
82 | struct pci_dev *pdev = NULL; |
| 83 | struct acpi_handle_node *node, *tmp; |
83 | struct acpi_handle_node *node, *tmp; |
| 84 | struct acpi_pci_root *root; |
84 | struct acpi_pci_root *root; |
| 85 | LIST_HEAD(device_list); |
85 | LIST_HEAD(device_list); |
| 86 | 86 | ||
| 87 | /* |
87 | /* |
| 88 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. |
88 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. |
| 89 | */ |
89 | */ |
| 90 | phandle = handle; |
90 | phandle = handle; |
| 91 | while (!acpi_is_root_bridge(phandle)) { |
91 | while (!acpi_is_root_bridge(phandle)) { |
| 92 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); |
92 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); |
| 93 | if (!node) |
93 | if (!node) |
| 94 | goto out; |
94 | goto out; |
| 95 | 95 | ||
| 96 | INIT_LIST_HEAD(&node->node); |
96 | INIT_LIST_HEAD(&node->node); |
| 97 | node->handle = phandle; |
97 | node->handle = phandle; |
| 98 | list_add(&node->node, &device_list); |
98 | list_add(&node->node, &device_list); |
| 99 | 99 | ||
| 100 | status = AcpiGetParent(phandle, &phandle); |
100 | status = AcpiGetParent(phandle, &phandle); |
| 101 | if (ACPI_FAILURE(status)) |
101 | if (ACPI_FAILURE(status)) |
| 102 | goto out; |
102 | goto out; |
| 103 | } |
103 | } |
| 104 | 104 | ||
| 105 | root = acpi_pci_find_root(phandle); |
105 | root = acpi_pci_find_root(phandle); |
| 106 | if (!root) |
106 | if (!root) |
| 107 | goto out; |
107 | goto out; |
| 108 | 108 | ||
| 109 | pbus = root->bus; |
109 | pbus = root->bus; |
| 110 | 110 | ||
| 111 | /* |
111 | /* |
| 112 | * Now, walk back down the PCI device tree until we return to our |
112 | * Now, walk back down the PCI device tree until we return to our |
| 113 | * original handle. Assumes that everything between the PCI root |
113 | * original handle. Assumes that everything between the PCI root |
| 114 | * bridge and the device we're looking for must be a P2P bridge. |
114 | * bridge and the device we're looking for must be a P2P bridge. |
| 115 | */ |
115 | */ |
| 116 | list_for_each_entry(node, &device_list, node) { |
116 | list_for_each_entry(node, &device_list, node) { |
| 117 | ACPI_HANDLE hnd = node->handle; |
117 | ACPI_HANDLE hnd = node->handle; |
| 118 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); |
118 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); |
| 119 | if (ACPI_FAILURE(status)) |
119 | if (ACPI_FAILURE(status)) |
| 120 | goto out; |
120 | goto out; |
| 121 | dev = (adr >> 16) & 0xffff; |
121 | dev = (adr >> 16) & 0xffff; |
| 122 | fn = adr & 0xffff; |
122 | fn = adr & 0xffff; |
| 123 | 123 | ||
| 124 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); |
124 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); |
| 125 | if (!pdev || hnd == handle) |
125 | if (!pdev || hnd == handle) |
| 126 | break; |
126 | break; |
| 127 | 127 | ||
| 128 | pbus = pdev->subordinate; |
128 | pbus = pdev->subordinate; |
| 129 | // pci_dev_put(pdev); |
129 | // pci_dev_put(pdev); |
| 130 | 130 | ||
| 131 | /* |
131 | /* |
| 132 | * This function may be called for a non-PCI device that has a |
132 | * This function may be called for a non-PCI device that has a |
| 133 | * PCI parent (eg. a disk under a PCI SATA controller). In that |
133 | * PCI parent (eg. a disk under a PCI SATA controller). In that |
| 134 | * case pdev->subordinate will be NULL for the parent. |
134 | * case pdev->subordinate will be NULL for the parent. |
| 135 | */ |
135 | */ |
| 136 | if (!pbus) { |
136 | if (!pbus) { |
| 137 | dbgprintf("Not a PCI-to-PCI bridge\n"); |
137 | dbgprintf("Not a PCI-to-PCI bridge\n"); |
| 138 | pdev = NULL; |
138 | pdev = NULL; |
| 139 | break; |
139 | break; |
| 140 | } |
140 | } |
| 141 | } |
141 | } |
| 142 | out: |
142 | out: |
| 143 | list_for_each_entry_safe(node, tmp, &device_list, node) |
143 | list_for_each_entry_safe(node, tmp, &device_list, node) |
| 144 | kfree(node); |
144 | kfree(node); |
| 145 | 145 | ||
| 146 | return pdev; |
146 | return pdev; |
| 147 | } |
147 | } |
| 148 | 148 | ||
| - | 149 | ||
| - | 150 | static void print_bus_irqs(struct pci_bus *bus) |
|
| - | 151 | { |
|
| - | 152 | struct pci_dev *dev; |
|
| - | 153 | ||
| - | 154 | list_for_each_entry(dev, &bus->devices, bus_list) |
|
| - | 155 | { |
|
| - | 156 | dbgprintf("PCI_%x_%x bus:%d devfn: %x bios irq %d acpi irq %d\n", |
|
| - | 157 | dev->vendor, dev->device, dev->busnr, dev->devfn, |
|
| - | 158 | dev->irq, acpi_get_irq(dev)); |
|
| - | 159 | }; |
|
| - | 160 | } |
|
| - | 161 | ||
| - | 162 | void print_pci_irqs() |
|
| - | 163 | { |
|
| - | 164 | struct acpi_pci_root *root; |
|
| - | 165 | ||
| - | 166 | ENTER(); |
|
| - | 167 | list_for_each_entry(root, &acpi_pci_roots, node) |
|
| - | 168 | { |
|
| - | 169 | struct pci_bus *pbus, *tbus; |
|
| - | 170 | struct pci_dev *dev; |
|
| - | 171 | ||
| - | 172 | pbus = root->bus; |
|
| - | 173 | ||
| - | 174 | list_for_each_entry(dev, &pbus->devices, bus_list) |
|
| - | 175 | { |
|
| - | 176 | dbgprintf("PCI_%x_%x bus:%d devfn: %x bios irq %d acpi irq %d\n", |
|
| - | 177 | dev->vendor, dev->device, dev->busnr, dev->devfn, |
|
| - | 178 | dev->irq, acpi_get_irq(dev)); |
|
| - | 179 | }; |
|
| - | 180 | ||
| - | 181 | list_for_each_entry(tbus, &pbus->children, node) |
|
| - | 182 | { |
|
| - | 183 | print_bus_irqs(tbus); |
|
| - | 184 | }; |
|
| - | 185 | } |
|
| - | 186 | LEAVE(); |
|
| - | 187 | }; |
|
| - | 188 | ||
| - | 189 | ||