PCI: mvebu: Call request_resource() on the apertures

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>

1 files changed, 23 insertions, 1 deletions

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 05e352889868..d3d1cfd51e09 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -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);