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PCI: xilinx: Use of_pci_get_host_bridge_resources() to parse DT

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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 0021d22b73 ("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>
This commit is contained in:
Bharat Kumar Gogada 2016-02-11 21:58:07 +05:30 committed by Bjorn Helgaas
parent 92e963f50f
commit 0259882e34
1 changed files with 5 additions and 102 deletions
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107
drivers/pci/host/pcie-xilinx.c
View File

@ -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 {
@ -658,97 +654,6 @@ static struct pci_bus *xilinx_pcie_scan_bus(int nr, struct pci_sys_data *sys)
return bus;
}
/**
* 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;
}