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authorBharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>2016-02-11 21:58:07 +0530
committerBjorn Helgaas <bhelgaas@google.com>2016-03-08 13:49:37 -0600
commit0259882e342e5626d204a5c87d0c3fbbad4d7736 (patch)
tree15e7f9e5d625f6eeae637b1f3501a9a2c01895a7 /drivers/pci/host/pcie-xilinx.c
parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
downloadop-kernel-dev-0259882e342e5626d204a5c87d0c3fbbad4d7736.zip
op-kernel-dev-0259882e342e5626d204a5c87d0c3fbbad4d7736.tar.gz
PCI: xilinx: Use of_pci_get_host_bridge_resources() to parse DT
Use the new of_pci_get_host_bridge_resources() API in place of the PCI OF DT parser. [bhelgaas: revise changelog to show similarity to 0021d22b73d6 ("PCI: designware: Use of_pci_get_host_bridge_resources() to parse DT")] Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers/pci/host/pcie-xilinx.c')
-rw-r--r--drivers/pci/host/pcie-xilinx.c107
1 files changed, 5 insertions, 102 deletions
diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index 4cfa463..477a6c3 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -94,9 +94,6 @@
/* Number of MSI IRQs */
#define XILINX_NUM_MSI_IRQS 128
-/* Number of Memory Resources */
-#define XILINX_MAX_NUM_RESOURCES 3
-
/**
* struct xilinx_pcie_port - PCIe port information
* @reg_base: IO Mapped Register Base
@@ -105,7 +102,6 @@
* @root_busno: Root Bus number
* @dev: Device pointer
* @irq_domain: IRQ domain pointer
- * @bus_range: Bus range
* @resources: Bus Resources
*/
struct xilinx_pcie_port {
@@ -659,97 +655,6 @@ static struct pci_bus *xilinx_pcie_scan_bus(int nr, struct pci_sys_data *sys)
}
/**
- * xilinx_pcie_parse_and_add_res - Add resources by parsing ranges
- * @port: PCIe port information
- *
- * Return: '0' on success and error value on failure
- */
-static int xilinx_pcie_parse_and_add_res(struct xilinx_pcie_port *port)
-{
- struct device *dev = port->dev;
- struct device_node *node = dev->of_node;
- struct resource *mem;
- resource_size_t offset;
- struct of_pci_range_parser parser;
- struct of_pci_range range;
- struct resource_entry *win;
- int err = 0, mem_resno = 0;
-
- /* Get the ranges */
- if (of_pci_range_parser_init(&parser, node)) {
- dev_err(dev, "missing \"ranges\" property\n");
- return -EINVAL;
- }
-
- /* Parse the ranges and add the resources found to the list */
- for_each_of_pci_range(&parser, &range) {
-
- if (mem_resno >= XILINX_MAX_NUM_RESOURCES) {
- dev_err(dev, "Maximum memory resources exceeded\n");
- return -EINVAL;
- }
-
- mem = devm_kmalloc(dev, sizeof(*mem), GFP_KERNEL);
- if (!mem) {
- err = -ENOMEM;
- goto free_resources;
- }
-
- of_pci_range_to_resource(&range, node, mem);
-
- switch (mem->flags & IORESOURCE_TYPE_BITS) {
- case IORESOURCE_MEM:
- offset = range.cpu_addr - range.pci_addr;
- mem_resno++;
- break;
- default:
- err = -EINVAL;
- break;
- }
-
- if (err < 0) {
- dev_warn(dev, "Invalid resource found %pR\n", mem);
- continue;
- }
-
- err = request_resource(&iomem_resource, mem);
- if (err)
- goto free_resources;
-
- pci_add_resource_offset(&port->resources, mem, offset);
- }
-
- /* Get the bus range */
- if (of_pci_parse_bus_range(node, &port->bus_range)) {
- u32 val = pcie_read(port, XILINX_PCIE_REG_BIR);
- u8 last;
-
- last = (val & XILINX_PCIE_BIR_ECAM_SZ_MASK) >>
- XILINX_PCIE_BIR_ECAM_SZ_SHIFT;
-
- port->bus_range = (struct resource) {
- .name = node->name,
- .start = 0,
- .end = last,
- .flags = IORESOURCE_BUS,
- };
- }
-
- /* Register bus resource */
- pci_add_resource(&port->resources, &port->bus_range);
-
- return 0;
-
-free_resources:
- release_child_resources(&iomem_resource);
- resource_list_for_each_entry(win, &port->resources)
- devm_kfree(dev, win->res);
- pci_free_resource_list(&port->resources);
-
- return err;
-}
-
-/**
* xilinx_pcie_parse_dt - Parse Device tree
* @port: PCIe port information
*
@@ -803,6 +708,8 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
struct hw_pci hw;
struct device *dev = &pdev->dev;
int err;
+ resource_size_t iobase = 0;
+ LIST_HEAD(res);
if (!dev->of_node)
return -ENODEV;
@@ -827,14 +734,10 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
return err;
}
- /*
- * Parse PCI ranges, configuration bus range and
- * request their resources
- */
- INIT_LIST_HEAD(&port->resources);
- err = xilinx_pcie_parse_and_add_res(port);
+ err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff, &res,
+ &iobase);
if (err) {
- dev_err(dev, "Failed adding resources\n");
+ dev_err(dev, "Getting bridge resources failed\n");
return err;
}
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