mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-29 09:16:33 +00:00
arm64: PCI: Migrate ACPI related functions to pci-acpi.c
The functions defined in arm64 for ACPI support are required for RISC-V also. To avoid duplication, move these functions to common location. Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Will Deacon <will@kernel.org> Tested-by: Björn Töpel <bjorn@rivosinc.com> Link: https://patch.msgid.link/20240812005929.113499-2-sunilvl@ventanamicro.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sunil V L
Rafael J. Wysocki
parent
e9252c3768
commit
789befdfa3
@ -6,28 +6,7 @@
|
||||
* Copyright (C) 2014 ARM Ltd.
|
||||
*/
|
||||
|
||||
#include <linux/acpi.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/pci-acpi.h>
|
||||
#include <linux/pci-ecam.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#ifdef CONFIG_ACPI
|
||||
/*
|
||||
* Try to assign the IRQ number when probing a new device
|
||||
*/
|
||||
int pcibios_alloc_irq(struct pci_dev *dev)
|
||||
{
|
||||
if (!acpi_disabled)
|
||||
acpi_pci_irq_enable(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* raw_pci_read/write - Platform-specific PCI config space access.
|
||||
@ -61,173 +40,3 @@ int pcibus_to_node(struct pci_bus *bus)
|
||||
EXPORT_SYMBOL(pcibus_to_node);
|
||||
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ACPI
|
||||
|
||||
struct acpi_pci_generic_root_info {
|
||||
struct acpi_pci_root_info common;
|
||||
struct pci_config_window *cfg; /* config space mapping */
|
||||
};
|
||||
|
||||
int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
|
||||
{
|
||||
struct pci_config_window *cfg = bus->sysdata;
|
||||
struct acpi_device *adev = to_acpi_device(cfg->parent);
|
||||
struct acpi_pci_root *root = acpi_driver_data(adev);
|
||||
|
||||
return root->segment;
|
||||
}
|
||||
|
||||
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
|
||||
{
|
||||
struct pci_config_window *cfg;
|
||||
struct acpi_device *adev;
|
||||
struct device *bus_dev;
|
||||
|
||||
if (acpi_disabled)
|
||||
return 0;
|
||||
|
||||
cfg = bridge->bus->sysdata;
|
||||
|
||||
/*
|
||||
* On Hyper-V there is no corresponding ACPI device for a root bridge,
|
||||
* therefore ->parent is set as NULL by the driver. And set 'adev' as
|
||||
* NULL in this case because there is no proper ACPI device.
|
||||
*/
|
||||
if (!cfg->parent)
|
||||
adev = NULL;
|
||||
else
|
||||
adev = to_acpi_device(cfg->parent);
|
||||
|
||||
bus_dev = &bridge->bus->dev;
|
||||
|
||||
ACPI_COMPANION_SET(&bridge->dev, adev);
|
||||
set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev)));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
|
||||
{
|
||||
struct resource_entry *entry, *tmp;
|
||||
int status;
|
||||
|
||||
status = acpi_pci_probe_root_resources(ci);
|
||||
resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
|
||||
if (!(entry->res->flags & IORESOURCE_WINDOW))
|
||||
resource_list_destroy_entry(entry);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
/*
|
||||
* Lookup the bus range for the domain in MCFG, and set up config space
|
||||
* mapping.
|
||||
*/
|
||||
static struct pci_config_window *
|
||||
pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root)
|
||||
{
|
||||
struct device *dev = &root->device->dev;
|
||||
struct resource *bus_res = &root->secondary;
|
||||
u16 seg = root->segment;
|
||||
const struct pci_ecam_ops *ecam_ops;
|
||||
struct resource cfgres;
|
||||
struct acpi_device *adev;
|
||||
struct pci_config_window *cfg;
|
||||
int ret;
|
||||
|
||||
ret = pci_mcfg_lookup(root, &cfgres, &ecam_ops);
|
||||
if (ret) {
|
||||
dev_err(dev, "%04x:%pR ECAM region not found\n", seg, bus_res);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
adev = acpi_resource_consumer(&cfgres);
|
||||
if (adev)
|
||||
dev_info(dev, "ECAM area %pR reserved by %s\n", &cfgres,
|
||||
dev_name(&adev->dev));
|
||||
else
|
||||
dev_warn(dev, FW_BUG "ECAM area %pR not reserved in ACPI namespace\n",
|
||||
&cfgres);
|
||||
|
||||
cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops);
|
||||
if (IS_ERR(cfg)) {
|
||||
dev_err(dev, "%04x:%pR error %ld mapping ECAM\n", seg, bus_res,
|
||||
PTR_ERR(cfg));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return cfg;
|
||||
}
|
||||
|
||||
/* release_info: free resources allocated by init_info */
|
||||
static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci)
|
||||
{
|
||||
struct acpi_pci_generic_root_info *ri;
|
||||
|
||||
ri = container_of(ci, struct acpi_pci_generic_root_info, common);
|
||||
pci_ecam_free(ri->cfg);
|
||||
kfree(ci->ops);
|
||||
kfree(ri);
|
||||
}
|
||||
|
||||
/* Interface called from ACPI code to setup PCI host controller */
|
||||
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
||||
{
|
||||
struct acpi_pci_generic_root_info *ri;
|
||||
struct pci_bus *bus, *child;
|
||||
struct acpi_pci_root_ops *root_ops;
|
||||
struct pci_host_bridge *host;
|
||||
|
||||
ri = kzalloc(sizeof(*ri), GFP_KERNEL);
|
||||
if (!ri)
|
||||
return NULL;
|
||||
|
||||
root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL);
|
||||
if (!root_ops) {
|
||||
kfree(ri);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ri->cfg = pci_acpi_setup_ecam_mapping(root);
|
||||
if (!ri->cfg) {
|
||||
kfree(ri);
|
||||
kfree(root_ops);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
root_ops->release_info = pci_acpi_generic_release_info;
|
||||
root_ops->prepare_resources = pci_acpi_root_prepare_resources;
|
||||
root_ops->pci_ops = (struct pci_ops *)&ri->cfg->ops->pci_ops;
|
||||
bus = acpi_pci_root_create(root, root_ops, &ri->common, ri->cfg);
|
||||
if (!bus)
|
||||
return NULL;
|
||||
|
||||
/* If we must preserve the resource configuration, claim now */
|
||||
host = pci_find_host_bridge(bus);
|
||||
if (host->preserve_config)
|
||||
pci_bus_claim_resources(bus);
|
||||
|
||||
/*
|
||||
* Assign whatever was left unassigned. If we didn't claim above,
|
||||
* this will reassign everything.
|
||||
*/
|
||||
pci_assign_unassigned_root_bus_resources(bus);
|
||||
|
||||
list_for_each_entry(child, &bus->children, node)
|
||||
pcie_bus_configure_settings(child);
|
||||
|
||||
return bus;
|
||||
}
|
||||
|
||||
void pcibios_add_bus(struct pci_bus *bus)
|
||||
{
|
||||
acpi_pci_add_bus(bus);
|
||||
}
|
||||
|
||||
void pcibios_remove_bus(struct pci_bus *bus)
|
||||
{
|
||||
acpi_pci_remove_bus(bus);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
@ -15,6 +15,7 @@
|
||||
#include <linux/pci_hotplug.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pci-acpi.h>
|
||||
#include <linux/pci-ecam.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/pm_qos.h>
|
||||
#include <linux/rwsem.h>
|
||||
@ -1541,3 +1542,184 @@ static int __init acpi_pci_init(void)
|
||||
return 0;
|
||||
}
|
||||
arch_initcall(acpi_pci_init);
|
||||
|
||||
#if defined(CONFIG_ARM64)
|
||||
|
||||
/*
|
||||
* Try to assign the IRQ number when probing a new device
|
||||
*/
|
||||
int pcibios_alloc_irq(struct pci_dev *dev)
|
||||
{
|
||||
if (!acpi_disabled)
|
||||
acpi_pci_irq_enable(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct acpi_pci_generic_root_info {
|
||||
struct acpi_pci_root_info common;
|
||||
struct pci_config_window *cfg; /* config space mapping */
|
||||
};
|
||||
|
||||
int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
|
||||
{
|
||||
struct pci_config_window *cfg = bus->sysdata;
|
||||
struct acpi_device *adev = to_acpi_device(cfg->parent);
|
||||
struct acpi_pci_root *root = acpi_driver_data(adev);
|
||||
|
||||
return root->segment;
|
||||
}
|
||||
|
||||
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
|
||||
{
|
||||
struct pci_config_window *cfg;
|
||||
struct acpi_device *adev;
|
||||
struct device *bus_dev;
|
||||
|
||||
if (acpi_disabled)
|
||||
return 0;
|
||||
|
||||
cfg = bridge->bus->sysdata;
|
||||
|
||||
/*
|
||||
* On Hyper-V there is no corresponding ACPI device for a root bridge,
|
||||
* therefore ->parent is set as NULL by the driver. And set 'adev' as
|
||||
* NULL in this case because there is no proper ACPI device.
|
||||
*/
|
||||
if (!cfg->parent)
|
||||
adev = NULL;
|
||||
else
|
||||
adev = to_acpi_device(cfg->parent);
|
||||
|
||||
bus_dev = &bridge->bus->dev;
|
||||
|
||||
ACPI_COMPANION_SET(&bridge->dev, adev);
|
||||
set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev)));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
|
||||
{
|
||||
struct resource_entry *entry, *tmp;
|
||||
int status;
|
||||
|
||||
status = acpi_pci_probe_root_resources(ci);
|
||||
resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
|
||||
if (!(entry->res->flags & IORESOURCE_WINDOW))
|
||||
resource_list_destroy_entry(entry);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
/*
|
||||
* Lookup the bus range for the domain in MCFG, and set up config space
|
||||
* mapping.
|
||||
*/
|
||||
static struct pci_config_window *
|
||||
pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root)
|
||||
{
|
||||
struct device *dev = &root->device->dev;
|
||||
struct resource *bus_res = &root->secondary;
|
||||
u16 seg = root->segment;
|
||||
const struct pci_ecam_ops *ecam_ops;
|
||||
struct resource cfgres;
|
||||
struct acpi_device *adev;
|
||||
struct pci_config_window *cfg;
|
||||
int ret;
|
||||
|
||||
ret = pci_mcfg_lookup(root, &cfgres, &ecam_ops);
|
||||
if (ret) {
|
||||
dev_err(dev, "%04x:%pR ECAM region not found\n", seg, bus_res);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
adev = acpi_resource_consumer(&cfgres);
|
||||
if (adev)
|
||||
dev_info(dev, "ECAM area %pR reserved by %s\n", &cfgres,
|
||||
dev_name(&adev->dev));
|
||||
else
|
||||
dev_warn(dev, FW_BUG "ECAM area %pR not reserved in ACPI namespace\n",
|
||||
&cfgres);
|
||||
|
||||
cfg = pci_ecam_create(dev, &cfgres, bus_res, ecam_ops);
|
||||
if (IS_ERR(cfg)) {
|
||||
dev_err(dev, "%04x:%pR error %ld mapping ECAM\n", seg, bus_res,
|
||||
PTR_ERR(cfg));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return cfg;
|
||||
}
|
||||
|
||||
/* release_info: free resources allocated by init_info */
|
||||
static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci)
|
||||
{
|
||||
struct acpi_pci_generic_root_info *ri;
|
||||
|
||||
ri = container_of(ci, struct acpi_pci_generic_root_info, common);
|
||||
pci_ecam_free(ri->cfg);
|
||||
kfree(ci->ops);
|
||||
kfree(ri);
|
||||
}
|
||||
|
||||
/* Interface called from ACPI code to setup PCI host controller */
|
||||
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
||||
{
|
||||
struct acpi_pci_generic_root_info *ri;
|
||||
struct pci_bus *bus, *child;
|
||||
struct acpi_pci_root_ops *root_ops;
|
||||
struct pci_host_bridge *host;
|
||||
|
||||
ri = kzalloc(sizeof(*ri), GFP_KERNEL);
|
||||
if (!ri)
|
||||
return NULL;
|
||||
|
||||
root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL);
|
||||
if (!root_ops) {
|
||||
kfree(ri);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ri->cfg = pci_acpi_setup_ecam_mapping(root);
|
||||
if (!ri->cfg) {
|
||||
kfree(ri);
|
||||
kfree(root_ops);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
root_ops->release_info = pci_acpi_generic_release_info;
|
||||
root_ops->prepare_resources = pci_acpi_root_prepare_resources;
|
||||
root_ops->pci_ops = (struct pci_ops *)&ri->cfg->ops->pci_ops;
|
||||
bus = acpi_pci_root_create(root, root_ops, &ri->common, ri->cfg);
|
||||
if (!bus)
|
||||
return NULL;
|
||||
|
||||
/* If we must preserve the resource configuration, claim now */
|
||||
host = pci_find_host_bridge(bus);
|
||||
if (host->preserve_config)
|
||||
pci_bus_claim_resources(bus);
|
||||
|
||||
/*
|
||||
* Assign whatever was left unassigned. If we didn't claim above,
|
||||
* this will reassign everything.
|
||||
*/
|
||||
pci_assign_unassigned_root_bus_resources(bus);
|
||||
|
||||
list_for_each_entry(child, &bus->children, node)
|
||||
pcie_bus_configure_settings(child);
|
||||
|
||||
return bus;
|
||||
}
|
||||
|
||||
void pcibios_add_bus(struct pci_bus *bus)
|
||||
{
|
||||
acpi_pci_add_bus(bus);
|
||||
}
|
||||
|
||||
void pcibios_remove_bus(struct pci_bus *bus)
|
||||
{
|
||||
acpi_pci_remove_bus(bus);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user