mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Bjorn Helgaas](/assets/img/avatar_default.png)
* pci/spdx: PCI: Add SPDX GPL-2.0+ to replace implicit GPL v2 or later statement PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate PCI: Add SPDX GPL-2.0 to replace COPYING boilerplate PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate PCI: Add SPDX GPL-2.0 when no license was specified
647 lines
17 KiB
C
647 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* PCI <-> OF mapping helpers
|
|
*
|
|
* Copyright 2011 IBM Corp.
|
|
*/
|
|
#define pr_fmt(fmt) "PCI: OF: " fmt
|
|
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_pci.h>
|
|
#include "pci.h"
|
|
|
|
void pci_set_of_node(struct pci_dev *dev)
|
|
{
|
|
if (!dev->bus->dev.of_node)
|
|
return;
|
|
dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node,
|
|
dev->devfn);
|
|
}
|
|
|
|
void pci_release_of_node(struct pci_dev *dev)
|
|
{
|
|
of_node_put(dev->dev.of_node);
|
|
dev->dev.of_node = NULL;
|
|
}
|
|
|
|
void pci_set_bus_of_node(struct pci_bus *bus)
|
|
{
|
|
if (bus->self == NULL)
|
|
bus->dev.of_node = pcibios_get_phb_of_node(bus);
|
|
else
|
|
bus->dev.of_node = of_node_get(bus->self->dev.of_node);
|
|
}
|
|
|
|
void pci_release_bus_of_node(struct pci_bus *bus)
|
|
{
|
|
of_node_put(bus->dev.of_node);
|
|
bus->dev.of_node = NULL;
|
|
}
|
|
|
|
struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
|
|
{
|
|
/* This should only be called for PHBs */
|
|
if (WARN_ON(bus->self || bus->parent))
|
|
return NULL;
|
|
|
|
/*
|
|
* Look for a node pointer in either the intermediary device we
|
|
* create above the root bus or its own parent. Normally only
|
|
* the later is populated.
|
|
*/
|
|
if (bus->bridge->of_node)
|
|
return of_node_get(bus->bridge->of_node);
|
|
if (bus->bridge->parent && bus->bridge->parent->of_node)
|
|
return of_node_get(bus->bridge->parent->of_node);
|
|
return NULL;
|
|
}
|
|
|
|
struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
|
|
{
|
|
#ifdef CONFIG_IRQ_DOMAIN
|
|
struct irq_domain *d;
|
|
|
|
if (!bus->dev.of_node)
|
|
return NULL;
|
|
|
|
/* Start looking for a phandle to an MSI controller. */
|
|
d = of_msi_get_domain(&bus->dev, bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
|
|
if (d)
|
|
return d;
|
|
|
|
/*
|
|
* If we don't have an msi-parent property, look for a domain
|
|
* directly attached to the host bridge.
|
|
*/
|
|
d = irq_find_matching_host(bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
|
|
if (d)
|
|
return d;
|
|
|
|
return irq_find_host(bus->dev.of_node);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
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 I/O 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;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_OF_IRQ)
|
|
/**
|
|
* of_irq_parse_pci - Resolve the interrupt for a PCI device
|
|
* @pdev: the device whose interrupt is to be resolved
|
|
* @out_irq: structure of_irq filled by this function
|
|
*
|
|
* This function resolves the PCI interrupt for a given PCI device. If a
|
|
* device-node exists for a given pci_dev, it will use normal OF tree
|
|
* walking. If not, it will implement standard swizzling and walk up the
|
|
* PCI tree until an device-node is found, at which point it will finish
|
|
* resolving using the OF tree walking.
|
|
*/
|
|
static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
|
|
{
|
|
struct device_node *dn, *ppnode;
|
|
struct pci_dev *ppdev;
|
|
__be32 laddr[3];
|
|
u8 pin;
|
|
int rc;
|
|
|
|
/*
|
|
* Check if we have a device node, if yes, fallback to standard
|
|
* device tree parsing
|
|
*/
|
|
dn = pci_device_to_OF_node(pdev);
|
|
if (dn) {
|
|
rc = of_irq_parse_one(dn, 0, out_irq);
|
|
if (!rc)
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Ok, we don't, time to have fun. Let's start by building up an
|
|
* interrupt spec. we assume #interrupt-cells is 1, which is standard
|
|
* for PCI. If you do different, then don't use that routine.
|
|
*/
|
|
rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
|
|
if (rc != 0)
|
|
goto err;
|
|
/* No pin, exit with no error message. */
|
|
if (pin == 0)
|
|
return -ENODEV;
|
|
|
|
/* Now we walk up the PCI tree */
|
|
for (;;) {
|
|
/* Get the pci_dev of our parent */
|
|
ppdev = pdev->bus->self;
|
|
|
|
/* Ouch, it's a host bridge... */
|
|
if (ppdev == NULL) {
|
|
ppnode = pci_bus_to_OF_node(pdev->bus);
|
|
|
|
/* No node for host bridge ? give up */
|
|
if (ppnode == NULL) {
|
|
rc = -EINVAL;
|
|
goto err;
|
|
}
|
|
} else {
|
|
/* We found a P2P bridge, check if it has a node */
|
|
ppnode = pci_device_to_OF_node(ppdev);
|
|
}
|
|
|
|
/*
|
|
* Ok, we have found a parent with a device-node, hand over to
|
|
* the OF parsing code.
|
|
* We build a unit address from the linux device to be used for
|
|
* resolution. Note that we use the linux bus number which may
|
|
* not match your firmware bus numbering.
|
|
* Fortunately, in most cases, interrupt-map-mask doesn't
|
|
* include the bus number as part of the matching.
|
|
* You should still be careful about that though if you intend
|
|
* to rely on this function (you ship a firmware that doesn't
|
|
* create device nodes for all PCI devices).
|
|
*/
|
|
if (ppnode)
|
|
break;
|
|
|
|
/*
|
|
* We can only get here if we hit a P2P bridge with no node;
|
|
* let's do standard swizzling and try again
|
|
*/
|
|
pin = pci_swizzle_interrupt_pin(pdev, pin);
|
|
pdev = ppdev;
|
|
}
|
|
|
|
out_irq->np = ppnode;
|
|
out_irq->args_count = 1;
|
|
out_irq->args[0] = pin;
|
|
laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
|
|
laddr[1] = laddr[2] = cpu_to_be32(0);
|
|
rc = of_irq_parse_raw(laddr, out_irq);
|
|
if (rc)
|
|
goto err;
|
|
return 0;
|
|
err:
|
|
if (rc == -ENOENT) {
|
|
dev_warn(&pdev->dev,
|
|
"%s: no interrupt-map found, INTx interrupts not available\n",
|
|
__func__);
|
|
pr_warn_once("%s: possibly some PCI slots don't have level triggered interrupts capability\n",
|
|
__func__);
|
|
} else {
|
|
dev_err(&pdev->dev, "%s: failed with rc=%d\n", __func__, rc);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* of_irq_parse_and_map_pci() - Decode a PCI IRQ from the device tree and map to a VIRQ
|
|
* @dev: The PCI device needing an IRQ
|
|
* @slot: PCI slot number; passed when used as map_irq callback. Unused
|
|
* @pin: PCI IRQ pin number; passed when used as map_irq callback. Unused
|
|
*
|
|
* @slot and @pin are unused, but included in the function so that this
|
|
* function can be used directly as the map_irq callback to
|
|
* pci_assign_irq() and struct pci_host_bridge.map_irq pointer
|
|
*/
|
|
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
struct of_phandle_args oirq;
|
|
int ret;
|
|
|
|
ret = of_irq_parse_pci(dev, &oirq);
|
|
if (ret)
|
|
return 0; /* Proper return code 0 == NO_IRQ */
|
|
|
|
return irq_create_of_mapping(&oirq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);
|
|
#endif /* CONFIG_OF_IRQ */
|
|
|
|
int pci_parse_request_of_pci_ranges(struct device *dev,
|
|
struct list_head *resources,
|
|
struct resource **bus_range)
|
|
{
|
|
int err, res_valid = 0;
|
|
struct device_node *np = dev->of_node;
|
|
resource_size_t iobase;
|
|
struct resource_entry *win, *tmp;
|
|
|
|
INIT_LIST_HEAD(resources);
|
|
err = of_pci_get_host_bridge_resources(np, 0, 0xff, resources, &iobase);
|
|
if (err)
|
|
return err;
|
|
|
|
err = devm_request_pci_bus_resources(dev, resources);
|
|
if (err)
|
|
goto out_release_res;
|
|
|
|
resource_list_for_each_entry_safe(win, tmp, resources) {
|
|
struct resource *res = win->res;
|
|
|
|
switch (resource_type(res)) {
|
|
case IORESOURCE_IO:
|
|
err = pci_remap_iospace(res, iobase);
|
|
if (err) {
|
|
dev_warn(dev, "error %d: failed to map resource %pR\n",
|
|
err, res);
|
|
resource_list_destroy_entry(win);
|
|
}
|
|
break;
|
|
case IORESOURCE_MEM:
|
|
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
|
|
break;
|
|
case IORESOURCE_BUS:
|
|
if (bus_range)
|
|
*bus_range = res;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (res_valid)
|
|
return 0;
|
|
|
|
dev_err(dev, "non-prefetchable memory resource required\n");
|
|
err = -EINVAL;
|
|
|
|
out_release_res:
|
|
pci_free_resource_list(resources);
|
|
return err;
|
|
}
|
|
|