@@ -189,7 +189,7 @@ static bool xilinx_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
}
/**
- * xilinx_pcie_config_base - Get configuration base
+ * xilinx_pcie_map_bus - Get configuration base
* @bus: PCI Bus structure
* @devfn: Device/function
* @where: Offset from base
@@ -197,96 +197,26 @@ static bool xilinx_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
* Return: Base address of the configuration space needed to be
* accessed.
*/
-static void __iomem *xilinx_pcie_config_base(struct pci_bus *bus,
- unsigned int devfn, int where)
+static void __iomem *xilinx_pcie_map_bus(struct pci_bus *bus,
+ unsigned int devfn, int where)
{
struct xilinx_pcie_port *port = sys_to_pcie(bus->sysdata);
int relbus;
+ if (!xilinx_pcie_valid_device(bus, devfn))
+ return NULL;
+
relbus = (bus->number << ECAM_BUS_NUM_SHIFT) |
(devfn << ECAM_DEV_NUM_SHIFT);
return port->reg_base + relbus + where;
}
-/**
- * xilinx_pcie_read_config - Read configuration space
- * @bus: PCI Bus structure
- * @devfn: Device/function
- * @where: Offset from base
- * @size: Byte/word/dword
- * @val: Value to be read
- *
- * Return: PCIBIOS_SUCCESSFUL on success
- * PCIBIOS_DEVICE_NOT_FOUND on failure
- */
-static int xilinx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 *val)
-{
- void __iomem *addr;
-
- if (!xilinx_pcie_valid_device(bus, devfn)) {
- *val = 0xFFFFFFFF;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- addr = xilinx_pcie_config_base(bus, devfn, where);
-
- switch (size) {
- case 1:
- *val = readb(addr);
- break;
- case 2:
- *val = readw(addr);
- break;
- default:
- *val = readl(addr);
- break;
- }
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-/**
- * xilinx_pcie_write_config - Write configuration space
- * @bus: PCI Bus structure
- * @devfn: Device/function
- * @where: Offset from base
- * @size: Byte/word/dword
- * @val: Value to be written to device
- *
- * Return: PCIBIOS_SUCCESSFUL on success
- * PCIBIOS_DEVICE_NOT_FOUND on failure
- */
-static int xilinx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 val)
-{
- void __iomem *addr;
-
- if (!xilinx_pcie_valid_device(bus, devfn))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- addr = xilinx_pcie_config_base(bus, devfn, where);
-
- switch (size) {
- case 1:
- writeb(val, addr);
- break;
- case 2:
- writew(val, addr);
- break;
- default:
- writel(val, addr);
- break;
- }
-
- return PCIBIOS_SUCCESSFUL;
-}
-
/* PCIe operations */
static struct pci_ops xilinx_pcie_ops = {
- .read = xilinx_pcie_read_config,
- .write = xilinx_pcie_write_config,
+ .map_bus = xilinx_pcie_map_bus,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
};
/* MSI functions */
Convert the Xilinx host PCI driver to use the generic config access functions. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com> Cc: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org --- drivers/pci/host/pcie-xilinx.c | 88 +++++------------------------------------- 1 file changed, 9 insertions(+), 79 deletions(-)