7b54366358
Use that device for pci_root_bus bridge pointer. Use pci_release_bus_bridge_dev() to release allocated pci_host_bridge in remove path. Use root bus bridge pointer to get host bridge pointer instead of searching host bridge list. That leaves the host bridge list unused, so remove it. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
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* host bridge related code
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/module.h>
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#include "pci.h"
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static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
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{
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struct pci_bus *bus;
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bus = dev->bus;
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while (bus->parent)
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bus = bus->parent;
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return bus;
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}
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static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
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{
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struct pci_bus *bus = find_pci_root_bus(dev);
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return to_pci_host_bridge(bus->bridge);
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}
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static bool resource_contains(struct resource *res1, struct resource *res2)
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{
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return res1->start <= res2->start && res1->end >= res2->end;
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}
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void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
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struct resource *res)
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{
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struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
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struct pci_host_bridge_window *window;
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resource_size_t offset = 0;
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list_for_each_entry(window, &bridge->windows, list) {
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if (resource_type(res) != resource_type(window->res))
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continue;
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if (resource_contains(window->res, res)) {
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offset = window->offset;
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break;
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}
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}
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region->start = res->start - offset;
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region->end = res->end - offset;
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}
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EXPORT_SYMBOL(pcibios_resource_to_bus);
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static bool region_contains(struct pci_bus_region *region1,
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struct pci_bus_region *region2)
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{
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return region1->start <= region2->start && region1->end >= region2->end;
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}
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void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
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struct pci_bus_region *region)
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{
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struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
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struct pci_host_bridge_window *window;
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resource_size_t offset = 0;
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list_for_each_entry(window, &bridge->windows, list) {
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struct pci_bus_region bus_region;
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if (resource_type(res) != resource_type(window->res))
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continue;
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bus_region.start = window->res->start - window->offset;
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bus_region.end = window->res->end - window->offset;
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if (region_contains(&bus_region, region)) {
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offset = window->offset;
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break;
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}
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}
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res->start = region->start + offset;
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res->end = region->end + offset;
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}
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EXPORT_SYMBOL(pcibios_bus_to_resource);
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