Root/
| 1 | /* |
| 2 | * host bridge related code |
| 3 | */ |
| 4 | |
| 5 | #include <linux/kernel.h> |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/pci.h> |
| 8 | #include <linux/module.h> |
| 9 | |
| 10 | #include "pci.h" |
| 11 | |
| 12 | static struct pci_bus *find_pci_root_bus(struct pci_dev *dev) |
| 13 | { |
| 14 | struct pci_bus *bus; |
| 15 | |
| 16 | bus = dev->bus; |
| 17 | while (bus->parent) |
| 18 | bus = bus->parent; |
| 19 | |
| 20 | return bus; |
| 21 | } |
| 22 | |
| 23 | static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev) |
| 24 | { |
| 25 | struct pci_bus *bus = find_pci_root_bus(dev); |
| 26 | |
| 27 | return to_pci_host_bridge(bus->bridge); |
| 28 | } |
| 29 | |
| 30 | void pci_set_host_bridge_release(struct pci_host_bridge *bridge, |
| 31 | void (*release_fn)(struct pci_host_bridge *), |
| 32 | void *release_data) |
| 33 | { |
| 34 | bridge->release_fn = release_fn; |
| 35 | bridge->release_data = release_data; |
| 36 | } |
| 37 | |
| 38 | static bool resource_contains(struct resource *res1, struct resource *res2) |
| 39 | { |
| 40 | return res1->start <= res2->start && res1->end >= res2->end; |
| 41 | } |
| 42 | |
| 43 | void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, |
| 44 | struct resource *res) |
| 45 | { |
| 46 | struct pci_host_bridge *bridge = find_pci_host_bridge(dev); |
| 47 | struct pci_host_bridge_window *window; |
| 48 | resource_size_t offset = 0; |
| 49 | |
| 50 | list_for_each_entry(window, &bridge->windows, list) { |
| 51 | if (resource_type(res) != resource_type(window->res)) |
| 52 | continue; |
| 53 | |
| 54 | if (resource_contains(window->res, res)) { |
| 55 | offset = window->offset; |
| 56 | break; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | region->start = res->start - offset; |
| 61 | region->end = res->end - offset; |
| 62 | } |
| 63 | EXPORT_SYMBOL(pcibios_resource_to_bus); |
| 64 | |
| 65 | static bool region_contains(struct pci_bus_region *region1, |
| 66 | struct pci_bus_region *region2) |
| 67 | { |
| 68 | return region1->start <= region2->start && region1->end >= region2->end; |
| 69 | } |
| 70 | |
| 71 | void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, |
| 72 | struct pci_bus_region *region) |
| 73 | { |
| 74 | struct pci_host_bridge *bridge = find_pci_host_bridge(dev); |
| 75 | struct pci_host_bridge_window *window; |
| 76 | resource_size_t offset = 0; |
| 77 | |
| 78 | list_for_each_entry(window, &bridge->windows, list) { |
| 79 | struct pci_bus_region bus_region; |
| 80 | |
| 81 | if (resource_type(res) != resource_type(window->res)) |
| 82 | continue; |
| 83 | |
| 84 | bus_region.start = window->res->start - window->offset; |
| 85 | bus_region.end = window->res->end - window->offset; |
| 86 | |
| 87 | if (region_contains(&bus_region, region)) { |
| 88 | offset = window->offset; |
| 89 | break; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | res->start = region->start + offset; |
| 94 | res->end = region->end + offset; |
| 95 | } |
| 96 | EXPORT_SYMBOL(pcibios_bus_to_resource); |
| 97 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9
