PCI: Move OF-related PCI functions into PCI core

	select ZONE_DMA if ARM_LPAE

	select GPIOLIB

	select PCI_QUIRKS if PCI

	select OF_ADDRESS_PCI

if ARCH_MVEBU

config OF_ADDRESS

	def_bool y

	depends on !SPARC && HAS_IOMEM

	select OF_ADDRESS_PCI if PCI

config OF_ADDRESS_PCI

	bool

config OF_IRQ

	def_bool y

	help

	  OpenFirmware MDIO bus (Ethernet PHY) accessors

config OF_PCI

	def_tristate PCI

	depends on PCI

	help

	  OpenFirmware PCI bus accessors

config OF_PCI_IRQ

	def_tristate PCI

	depends on OF_PCI && OF_IRQ

	help

	  OpenFirmware PCI IRQ routing helpers

config OF_RESERVED_MEM

	depends on OF_EARLY_FLATTREE

	bool

obj-$(CONFIG_OF_NET)	+= of_net.o

obj-$(CONFIG_OF_UNITTEST) += unittest.o

obj-$(CONFIG_OF_MDIO)	+= of_mdio.o

obj-$(CONFIG_OF_PCI)	+= of_pci.o

obj-$(CONFIG_OF_PCI_IRQ)  += of_pci_irq.o

obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o

obj-$(CONFIG_OF_RESOLVE)  += resolver.o

obj-$(CONFIG_OF_OVERLAY) += overlay.o

	return IORESOURCE_MEM;

}

#ifdef CONFIG_OF_ADDRESS_PCI

#ifdef CONFIG_PCI

/*

 * PCI bus specific translator

 */

{

	return of_bus_default_translate(addr + 1, offset, na - 1);

}

#endif /* CONFIG_OF_ADDRESS_PCI */

#ifdef CONFIG_PCI

const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,

			unsigned int *flags)

{

 */

static struct of_bus of_busses[] = {

#ifdef CONFIG_OF_ADDRESS_PCI

#ifdef CONFIG_PCI

	/* PCI */

	{

		.name = "pci",

		.translate = of_bus_pci_translate,

		.get_flags = of_bus_pci_get_flags,

	},

#endif /* CONFIG_OF_ADDRESS_PCI */

#endif /* CONFIG_PCI */

	/* ISA */

	{

		.name = "isa",

#define pr_fmt(fmt)	"OF: PCI: " fmt

#include <linux/kernel.h>

#include <linux/export.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/of_pci.h>

#include <linux/slab.h>

static inline int __of_pci_pci_compare(struct device_node *node,

				       unsigned int data)

{

	int devfn;

	devfn = of_pci_get_devfn(node);

	if (devfn < 0)

		return 0;

	return devfn == data;

}

struct device_node *of_pci_find_child_device(struct device_node *parent,

					     unsigned int devfn)

{

	struct device_node *node, *node2;

	for_each_child_of_node(parent, node) {

		if (__of_pci_pci_compare(node, devfn))

			return node;

		/*

		 * Some OFs create a parent node "multifunc-device" as

		 * a fake root for all functions of a multi-function

		 * device we go down them as well.

		 */

		if (!strcmp(node->name, "multifunc-device")) {

			for_each_child_of_node(node, node2) {

				if (__of_pci_pci_compare(node2, devfn)) {

					of_node_put(node);

					return node2;

				}

			}

		}

	}

	return NULL;

}

EXPORT_SYMBOL_GPL(of_pci_find_child_device);

/**

 * of_pci_get_devfn() - Get device and function numbers for a device node

 * @np: device node

 *

 * Parses a standard 5-cell PCI resource and returns an 8-bit value that can

 * be passed to the PCI_SLOT() and PCI_FUNC() macros to extract the device

 * and function numbers respectively. On error a negative error code is

 * returned.

 */

int of_pci_get_devfn(struct device_node *np)

{

	u32 reg[5];

	int error;

	error = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg));

	if (error)

		return error;

	return (reg[0] >> 8) & 0xff;

}

EXPORT_SYMBOL_GPL(of_pci_get_devfn);

/**

 * of_pci_parse_bus_range() - parse the bus-range property of a PCI device

 * @node: device node

 * @res: address to a struct resource to return the bus-range

 *

 * Returns 0 on success or a negative error-code on failure.

 */

int of_pci_parse_bus_range(struct device_node *node, struct resource *res)

{

	u32 bus_range[2];

	int error;

	error = of_property_read_u32_array(node, "bus-range", bus_range,

					   ARRAY_SIZE(bus_range));

	if (error)

		return error;

	res->name = node->name;

	res->start = bus_range[0];

	res->end = bus_range[1];

	res->flags = IORESOURCE_BUS;

	return 0;

}

EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);

/**

 * This function will try to obtain the host bridge domain number by

 * finding a property called "linux,pci-domain" of the given device node.

 *

 * @node: device tree node with the domain information

 *

 * Returns the associated domain number from DT in the range [0-0xffff], or

 * a negative value if the required property is not found.

 */

int of_get_pci_domain_nr(struct device_node *node)

{

	u32 domain;

	int error;

	error = of_property_read_u32(node, "linux,pci-domain", &domain);

	if (error)

		return error;

	return (u16)domain;

}

EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);

/**

 * This function will try to find the limitation of link speed by finding

 * a property called "max-link-speed" of the given device node.

 *

 * @node: device tree node with the max link speed information

 *

 * Returns the associated max link speed from DT, or a negative value if the

 * required property is not found or is invalid.

 */

int of_pci_get_max_link_speed(struct device_node *node)

{

	u32 max_link_speed;

	if (of_property_read_u32(node, "max-link-speed", &max_link_speed) ||

	    max_link_speed > 4)

		return -EINVAL;

	return max_link_speed;

}

EXPORT_SYMBOL_GPL(of_pci_get_max_link_speed);

/**

 * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only

 *                           is present and valid

 */

void of_pci_check_probe_only(void)

{

	u32 val;

	int ret;

	ret = of_property_read_u32(of_chosen, "linux,pci-probe-only", &val);

	if (ret) {

		if (ret == -ENODATA || ret == -EOVERFLOW)

			pr_warn("linux,pci-probe-only without valid value, ignoring\n");

		return;

	}

	if (val)

		pci_add_flags(PCI_PROBE_ONLY);

	else

		pci_clear_flags(PCI_PROBE_ONLY);

	pr_info("PROBE_ONLY %sabled\n", val ? "en" : "dis");

}

EXPORT_SYMBOL_GPL(of_pci_check_probe_only);

#if defined(CONFIG_OF_ADDRESS)

/**

 * of_pci_get_host_bridge_resources - Parse PCI host bridge resources from DT

 * @dev: device node of the host bridge having the range property

 * @busno: bus number associated with the bridge root bus

 * @bus_max: maximum number of buses for this bridge

 * @resources: list where the range of resources will be added after DT parsing

 * @io_base: pointer to a variable that will contain on return the physical

 * address for the start of the I/O range. Can be NULL if the caller doesn't

 * expect IO ranges to be present in the device tree.

 *

 * It is the caller's job to free the @resources list.

 *

 * This function will parse the "ranges" property of a PCI host bridge device

 * node and setup the resource mapping based on its content. It is expected

 * that the property conforms with the Power ePAPR document.

 *

 * It returns zero if the range parsing has been successful or a standard error

 * value if it failed.

 */

int of_pci_get_host_bridge_resources(struct device_node *dev,

			unsigned char busno, unsigned char bus_max,

			struct list_head *resources, resource_size_t *io_base)

{

	struct resource_entry *window;

	struct resource *res;

	struct resource *bus_range;

	struct of_pci_range range;

	struct of_pci_range_parser parser;

	char range_type[4];

	int err;

	if (io_base)

		*io_base = (resource_size_t)OF_BAD_ADDR;

	bus_range = kzalloc(sizeof(*bus_range), GFP_KERNEL);

	if (!bus_range)

		return -ENOMEM;

	pr_info("host bridge %pOF ranges:\n", dev);

	err = of_pci_parse_bus_range(dev, bus_range);

	if (err) {

		bus_range->start = busno;

		bus_range->end = bus_max;

		bus_range->flags = IORESOURCE_BUS;

		pr_info("  No bus range found for %pOF, using %pR\n",

			dev, bus_range);

	} else {

		if (bus_range->end > bus_range->start + bus_max)

			bus_range->end = bus_range->start + bus_max;

	}

	pci_add_resource(resources, bus_range);

	/* Check for ranges property */

	err = of_pci_range_parser_init(&parser, dev);

	if (err)

		goto parse_failed;

	pr_debug("Parsing ranges property...\n");

	for_each_of_pci_range(&parser, &range) {

		/* Read next ranges element */

		if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_IO)

			snprintf(range_type, 4, " IO");

		else if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM)

			snprintf(range_type, 4, "MEM");

		else

			snprintf(range_type, 4, "err");

		pr_info("  %s %#010llx..%#010llx -> %#010llx\n", range_type,

			range.cpu_addr, range.cpu_addr + range.size - 1,

			range.pci_addr);

		/*

		 * If we failed translation or got a zero-sized region

		 * then skip this range

		 */

		if (range.cpu_addr == OF_BAD_ADDR || range.size == 0)

			continue;

		res = kzalloc(sizeof(struct resource), GFP_KERNEL);

		if (!res) {

			err = -ENOMEM;

			goto parse_failed;

		}

		err = of_pci_range_to_resource(&range, dev, res);

		if (err) {

			kfree(res);

			continue;

		}

		if (resource_type(res) == IORESOURCE_IO) {

			if (!io_base) {

				pr_err("I/O range found for %pOF. Please provide an io_base pointer to save CPU base address\n",

					dev);

				err = -EINVAL;

				goto conversion_failed;

			}

			if (*io_base != (resource_size_t)OF_BAD_ADDR)

				pr_warn("More than one I/O resource converted for %pOF. CPU base address for old range lost!\n",

					dev);

			*io_base = range.cpu_addr;

		}

		pci_add_resource_offset(resources, res,	res->start - range.pci_addr);

	}

	return 0;

conversion_failed:

	kfree(res);

parse_failed:

	resource_list_for_each_entry(window, resources)

		kfree(window->res);

	pci_free_resource_list(resources);

	return err;

}

EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);

#endif /* CONFIG_OF_ADDRESS */

/**

 * of_pci_map_rid - Translate a requester ID through a downstream mapping.

 * @np: root complex device node.

 * @rid: PCI requester ID to map.

 * @map_name: property name of the map to use.

 * @map_mask_name: optional property name of the mask to use.

 * @target: optional pointer to a target device node.

 * @id_out: optional pointer to receive the translated ID.

 *

 * Given a PCI requester ID, look up the appropriate implementation-defined

 * platform ID and/or the target device which receives transactions on that

 * ID, as per the "iommu-map" and "msi-map" bindings. Either of @target or

 * @id_out may be NULL if only the other is required. If @target points to

 * a non-NULL device node pointer, only entries targeting that node will be

 * matched; if it points to a NULL value, it will receive the device node of

 * the first matching target phandle, with a reference held.

 *

 * Return: 0 on success or a standard error code on failure.

 */

int of_pci_map_rid(struct device_node *np, u32 rid,

		   const char *map_name, const char *map_mask_name,

		   struct device_node **target, u32 *id_out)

{

	u32 map_mask, masked_rid;

	int map_len;

	const __be32 *map = NULL;

	if (!np || !map_name || (!target && !id_out))

		return -EINVAL;

	map = of_get_property(np, map_name, &map_len);

	if (!map) {

		if (target)

			return -ENODEV;

		/* Otherwise, no map implies no translation */

		*id_out = rid;

		return 0;

	}

	if (!map_len || map_len % (4 * sizeof(*map))) {

		pr_err("%pOF: Error: Bad %s length: %d\n", np,

			map_name, map_len);

		return -EINVAL;

	}

	/* The default is to select all bits. */

	map_mask = 0xffffffff;

	/*

	 * Can be overridden by "{iommu,msi}-map-mask" property.

	 * If of_property_read_u32() fails, the default is used.

	 */

	if (map_mask_name)

		of_property_read_u32(np, map_mask_name, &map_mask);

	masked_rid = map_mask & rid;

	for ( ; map_len > 0; map_len -= 4 * sizeof(*map), map += 4) {

		struct device_node *phandle_node;

		u32 rid_base = be32_to_cpup(map + 0);

		u32 phandle = be32_to_cpup(map + 1);

		u32 out_base = be32_to_cpup(map + 2);

		u32 rid_len = be32_to_cpup(map + 3);

		if (rid_base & ~map_mask) {

			pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores rid-base (0x%x)\n",

				np, map_name, map_name,

				map_mask, rid_base);

			return -EFAULT;

		}

		if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)

			continue;

		phandle_node = of_find_node_by_phandle(phandle);

		if (!phandle_node)

			return -ENODEV;

		if (target) {

			if (*target)

				of_node_put(phandle_node);

			else

				*target = phandle_node;

			if (*target != phandle_node)

				continue;

		}

		if (id_out)

			*id_out = masked_rid - rid_base + out_base;

		pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n",

			np, map_name, map_mask, rid_base, out_base,

			rid_len, rid, masked_rid - rid_base + out_base);

		return 0;

	}

	pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",

		np, map_name, rid, target && *target ? *target : NULL);

	return -EFAULT;

}