mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
fefbc58271
Rename gen_pci_init() API as pci_host_common_ecam_create() and export it to allow the PCIe controller drivers to create and configure the ECAM region. Note that this API should only used by the drivers managing the drvdata on their own. Rest should continue using pci_host_common_init() API. Signed-off-by: Mayank Rana <mayank.rana@oss.qualcomm.com> [mani: commit message rewording] Signed-off-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20250616224259.3549811-3-mayank.rana@oss.qualcomm.com
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Common library for PCI host controller drivers
|
|
*
|
|
* Copyright (C) 2014 ARM Limited
|
|
*
|
|
* Author: Will Deacon <will.deacon@arm.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_pci.h>
|
|
#include <linux/pci-ecam.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "pci-host-common.h"
|
|
|
|
static void gen_pci_unmap_cfg(void *ptr)
|
|
{
|
|
pci_ecam_free((struct pci_config_window *)ptr);
|
|
}
|
|
|
|
struct pci_config_window *pci_host_common_ecam_create(struct device *dev,
|
|
struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
|
|
{
|
|
int err;
|
|
struct resource cfgres;
|
|
struct resource_entry *bus;
|
|
struct pci_config_window *cfg;
|
|
|
|
err = of_address_to_resource(dev->of_node, 0, &cfgres);
|
|
if (err) {
|
|
dev_err(dev, "missing \"reg\" property\n");
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
bus = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
|
|
if (!bus)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
cfg = pci_ecam_create(dev, &cfgres, bus->res, ops);
|
|
if (IS_ERR(cfg))
|
|
return cfg;
|
|
|
|
err = devm_add_action_or_reset(dev, gen_pci_unmap_cfg, cfg);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
return cfg;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_host_common_ecam_create);
|
|
|
|
int pci_host_common_init(struct platform_device *pdev,
|
|
const struct pci_ecam_ops *ops)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct pci_host_bridge *bridge;
|
|
struct pci_config_window *cfg;
|
|
|
|
bridge = devm_pci_alloc_host_bridge(dev, 0);
|
|
if (!bridge)
|
|
return -ENOMEM;
|
|
|
|
of_pci_check_probe_only();
|
|
|
|
/* Parse and map our Configuration Space windows */
|
|
cfg = pci_host_common_ecam_create(dev, bridge, ops);
|
|
if (IS_ERR(cfg))
|
|
return PTR_ERR(cfg);
|
|
|
|
platform_set_drvdata(pdev, bridge);
|
|
|
|
bridge->sysdata = cfg;
|
|
bridge->ops = (struct pci_ops *)&ops->pci_ops;
|
|
bridge->enable_device = ops->enable_device;
|
|
bridge->disable_device = ops->disable_device;
|
|
bridge->msi_domain = true;
|
|
|
|
return pci_host_probe(bridge);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_host_common_init);
|
|
|
|
int pci_host_common_probe(struct platform_device *pdev)
|
|
{
|
|
const struct pci_ecam_ops *ops;
|
|
|
|
ops = of_device_get_match_data(&pdev->dev);
|
|
if (!ops)
|
|
return -ENODEV;
|
|
|
|
return pci_host_common_init(pdev, ops);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_host_common_probe);
|
|
|
|
void pci_host_common_remove(struct platform_device *pdev)
|
|
{
|
|
struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
|
|
|
|
pci_lock_rescan_remove();
|
|
pci_stop_root_bus(bridge->bus);
|
|
pci_remove_root_bus(bridge->bus);
|
|
pci_unlock_rescan_remove();
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_host_common_remove);
|
|
|
|
MODULE_DESCRIPTION("Common library for PCI host controller drivers");
|
|
MODULE_LICENSE("GPL v2");
|