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PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev

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These interfaces:

  pcibios_resource_to_bus(struct pci_dev *dev, *bus_region, *resource)
  pcibios_bus_to_resource(struct pci_dev *dev, *resource, *bus_region)

took a pci_dev, but they really depend only on the pci_bus.  And we want to
use them in resource allocation paths where we have the bus but not a
device, so this patch converts them to take the pci_bus instead of the
pci_dev:

  pcibios_resource_to_bus(struct pci_bus *bus, *bus_region, *resource)
  pcibios_bus_to_resource(struct pci_bus *bus, *resource, *bus_region)

In fact, with standard PCI-PCI bridges, they only depend on the host
bridge, because that's the only place address translation occurs, but
we aren't going that far yet.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu
2013-12-09 22:54:40 -08:00
committed by Bjorn Helgaas
parent 0a5ef7b914
commit fc2798502f
17 changed files with 49 additions and 51 deletions
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4
arch/alpha/kernel/pci-sysfs.c
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@@ -83,7 +83,7 @@ static int pci_mmap_resource(struct kobject *kobj,
if (iomem_is_exclusive(res->start))
return -EINVAL;
pcibios_resource_to_bus(pdev, &bar, res);
pcibios_resource_to_bus(pdev->bus, &bar, res);
vma->vm_pgoff += bar.start >> (PAGE_SHIFT - (sparse ? 5 : 0));
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
@@ -139,7 +139,7 @@ static int sparse_mem_mmap_fits(struct pci_dev *pdev, int num)
long dense_offset;
unsigned long sparse_size;
pcibios_resource_to_bus(pdev, &bar, &pdev->resource[num]);
pcibios_resource_to_bus(pdev->bus, &bar, &pdev->resource[num]);
/* All core logic chips have 4G sparse address space, except
CIA which has 16G (see xxx_SPARSE_MEM and xxx_DENSE_MEM