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PCI: mvebu: Call request_resource() on the apertures

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It is typical for host drivers to request a resource for the aperture; once
this is done the PCI core will properly populate resources for all BARs in
the system.

With this patch cat /proc/iomem will now show:

  e0000000-efffffff : PCI MEM 0000
    e0000000-e00fffff : PCI Bus 0000:01
      e0000000-e001ffff : 0000:01:00.0

Tested on Kirkwood.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Jason Gunthorpe 2014-02-12 15:57:08 -07:00 committed by Bjorn Helgaas
parent a723e7523c
commit 2613ba480f
1 changed files with 23 additions and 1 deletions
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24
drivers/pci/host/pci-mvebu.c
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@ -101,7 +101,9 @@ struct mvebu_pcie {
struct mvebu_pcie_port *ports;
struct msi_chip *msi;
struct resource io;
char io_name[30];
struct resource realio;
char mem_name[30];
struct resource mem;
struct resource busn;
int nports;
@ -672,10 +674,30 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
{
struct mvebu_pcie *pcie = sys_to_pcie(sys);
int i;
int domain = 0;
if (resource_size(&pcie->realio) != 0)
#ifdef CONFIG_PCI_DOMAINS
domain = sys->domain;
#endif
snprintf(pcie->mem_name, sizeof(pcie->mem_name), "PCI MEM %04x",
domain);
pcie->mem.name = pcie->mem_name;
snprintf(pcie->io_name, sizeof(pcie->io_name), "PCI I/O %04x", domain);
pcie->realio.name = pcie->io_name;
if (request_resource(&iomem_resource, &pcie->mem))
return 0;
if (resource_size(&pcie->realio) != 0) {
if (request_resource(&ioport_resource, &pcie->realio)) {
release_resource(&pcie->mem);
return 0;
}
pci_add_resource_offset(&sys->resources, &pcie->realio,
sys->io_offset);
}
pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset);
pci_add_resource(&sys->resources, &pcie->busn);