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Merge branch 'remotes/lorenzo/pci/host-generic' 

- Constify struct pci_ecam_ops (Rob Herring)

  - Support building as modules (Rob Herring)

  - Eliminate wrappers for pci_host_common_probe() by using DT match table
    data (Rob Herring)

* remotes/lorenzo/pci/host-generic:
  PCI: host-generic: Eliminate pci_host_common_probe wrappers
  PCI: host-generic: Support building as modules
  PCI: Constify struct pci_ecam_ops

# Conflicts:
#	drivers/pci/controller/dwc/pcie-hisi.c
This commit is contained in:
Bjorn Helgaas 2020-06-04 12:59:16 -05:00
parent d611b2b853 b2f75a41ea
commit d388e541e2
15 changed files with 78 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kernel/pci.c
View File

@ -117,7 +117,7 @@ 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;
struct pci_ecam_ops *ecam_ops;
const struct pci_ecam_ops *ecam_ops;
struct resource cfgres;
struct acpi_device *adev;
struct pci_config_window *cfg;
@ -185,7 +185,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
root_ops->release_info = pci_acpi_generic_release_info;
root_ops->prepare_resources = pci_acpi_root_prepare_resources;
root_ops->pci_ops = &ri->cfg->ops->pci_ops;
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;

8
drivers/acpi/pci_mcfg.c
View File

@ -29,7 +29,7 @@ struct mcfg_fixup {
u32 oem_revision;
u16 segment;
struct resource bus_range;
struct pci_ecam_ops *ops;
const struct pci_ecam_ops *ops;
struct resource cfgres;
};
@ -165,7 +165,7 @@ static int pci_mcfg_quirk_matches(struct mcfg_fixup *f, u16 segment,
static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
struct resource *cfgres,
struct pci_ecam_ops **ecam_ops)
const struct pci_ecam_ops **ecam_ops)
{
#ifdef CONFIG_PCI_QUIRKS
u16 segment = root->segment;
@ -191,9 +191,9 @@ static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
static LIST_HEAD(pci_mcfg_list);
int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
struct pci_ecam_ops **ecam_ops)
const struct pci_ecam_ops **ecam_ops)
{
struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
const struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
struct resource *bus_res = &root->secondary;
u16 seg = root->segment;
struct mcfg_entry *e;

4
drivers/pci/controller/Kconfig
View File

@ -62,11 +62,11 @@ config PCIE_RCAR
Say Y here if you want PCIe controller support on R-Car SoCs.
config PCI_HOST_COMMON
bool
tristate
select PCI_ECAM
config PCI_HOST_GENERIC
bool "Generic PCI host controller"
tristate "Generic PCI host controller"
depends on OF
select PCI_HOST_COMMON
select IRQ_DOMAIN

2
drivers/pci/controller/dwc/pcie-al.c
View File

@ -80,7 +80,7 @@ static int al_pcie_init(struct pci_config_window *cfg)
return 0;
}
struct pci_ecam_ops al_pcie_ops = {
const struct pci_ecam_ops al_pcie_ops = {
.bus_shift = 20,
.init = al_pcie_init,
.pci_ops = {

19
drivers/pci/controller/dwc/pcie-hisi.c
View File

@ -104,7 +104,7 @@ static int hisi_pcie_init(struct pci_config_window *cfg)
return 0;
}
struct pci_ecam_ops hisi_pcie_ops = {
const struct pci_ecam_ops hisi_pcie_ops = {
.bus_shift = 20,
.init = hisi_pcie_init,
.pci_ops = {
@ -332,15 +332,6 @@ static struct platform_driver hisi_pcie_driver = {
};
builtin_platform_driver(hisi_pcie_driver);
static int hisi_pcie_almost_ecam_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct pci_ecam_ops *ops;
ops = (struct pci_ecam_ops *)of_device_get_match_data(dev);
return pci_host_common_probe(pdev, ops);
}
static int hisi_pcie_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;
@ -362,7 +353,7 @@ static int hisi_pcie_platform_init(struct pci_config_window *cfg)
return 0;
}
static struct pci_ecam_ops hisi_pcie_platform_ops = {
static const struct pci_ecam_ops hisi_pcie_platform_ops = {
.bus_shift = 20,
.init = hisi_pcie_platform_init,
.pci_ops = {
@ -375,17 +366,17 @@ static struct pci_ecam_ops hisi_pcie_platform_ops = {
static const struct of_device_id hisi_pcie_almost_ecam_of_match[] = {
{
.compatible = "hisilicon,hip06-pcie-ecam",
.data = (void *) &hisi_pcie_platform_ops,
.data = &hisi_pcie_platform_ops,
},
{
.compatible = "hisilicon,hip07-pcie-ecam",
.data = (void *) &hisi_pcie_platform_ops,
.data = &hisi_pcie_platform_ops,
},
{},
};
static struct platform_driver hisi_pcie_almost_ecam_driver = {
.probe = hisi_pcie_almost_ecam_probe,
.probe = pci_host_common_probe,
.driver = {
.name = "hisi-pcie-almost-ecam",
.of_match_table = hisi_pcie_almost_ecam_of_match,

18
drivers/pci/controller/pci-host-common.c
View File

@ -8,7 +8,9 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_pci.h>
#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
@ -19,7 +21,7 @@ static void gen_pci_unmap_cfg(void *ptr)
}
static struct pci_config_window *gen_pci_init(struct device *dev,
struct list_head *resources, struct pci_ecam_ops *ops)
struct list_head *resources, const struct pci_ecam_ops *ops)
{
int err;
struct resource cfgres;
@ -54,15 +56,19 @@ err_out:
return ERR_PTR(err);
}
int pci_host_common_probe(struct platform_device *pdev,
struct pci_ecam_ops *ops)
int pci_host_common_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct pci_host_bridge *bridge;
struct pci_config_window *cfg;
struct list_head resources;
const struct pci_ecam_ops *ops;
int ret;
ops = of_device_get_match_data(&pdev->dev);
if (!ops)
return -ENODEV;
bridge = devm_pci_alloc_host_bridge(dev, 0);
if (!bridge)
return -ENOMEM;
@ -82,7 +88,7 @@ int pci_host_common_probe(struct platform_device *pdev,
bridge->dev.parent = dev;
bridge->sysdata = cfg;
bridge->busnr = cfg->busr.start;
bridge->ops = &ops->pci_ops;
bridge->ops = (struct pci_ops *)&ops->pci_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
@ -95,6 +101,7 @@ int pci_host_common_probe(struct platform_device *pdev,
platform_set_drvdata(pdev, bridge->bus);
return 0;
}
EXPORT_SYMBOL_GPL(pci_host_common_probe);
int pci_host_common_remove(struct platform_device *pdev)
{
@ -107,3 +114,6 @@ int pci_host_common_remove(struct platform_device *pdev)
return 0;
}
EXPORT_SYMBOL_GPL(pci_host_common_remove);
MODULE_LICENSE("GPL v2");

26
drivers/pci/controller/pci-host-generic.c
View File

@ -10,12 +10,11 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/module.h>
#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
static struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
.bus_shift = 16,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
@ -49,7 +48,7 @@ static void __iomem *pci_dw_ecam_map_bus(struct pci_bus *bus,
return pci_ecam_map_bus(bus, devfn, where);
}
static struct pci_ecam_ops pci_dw_ecam_bus_ops = {
static const struct pci_ecam_ops pci_dw_ecam_bus_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_dw_ecam_map_bus,
@ -76,25 +75,16 @@ static const struct of_device_id gen_pci_of_match[] = {
{ },
};
static int gen_pci_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
struct pci_ecam_ops *ops;
of_id = of_match_node(gen_pci_of_match, pdev->dev.of_node);
ops = (struct pci_ecam_ops *)of_id->data;
return pci_host_common_probe(pdev, ops);
}
MODULE_DEVICE_TABLE(of, gen_pci_of_match);
static struct platform_driver gen_pci_driver = {
.driver = {
.name = "pci-host-generic",
.of_match_table = gen_pci_of_match,
.suppress_bind_attrs = true,
},
.probe = gen_pci_probe,
.probe = pci_host_common_probe,
.remove = pci_host_common_remove,
};
builtin_platform_driver(gen_pci_driver);
module_platform_driver(gen_pci_driver);
MODULE_LICENSE("GPL v2");

14
drivers/pci/controller/pci-thunder-ecam.c
View File

@ -345,7 +345,7 @@ static int thunder_ecam_config_write(struct pci_bus *bus, unsigned int devfn,
return pci_generic_config_write(bus, devfn, where, size, val);
}
struct pci_ecam_ops pci_thunder_ecam_ops = {
const struct pci_ecam_ops pci_thunder_ecam_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
@ -357,22 +357,20 @@ struct pci_ecam_ops pci_thunder_ecam_ops = {
#ifdef CONFIG_PCI_HOST_THUNDER_ECAM
static const struct of_device_id thunder_ecam_of_match[] = {
{ .compatible = "cavium,pci-host-thunder-ecam" },
{
.compatible = "cavium,pci-host-thunder-ecam",
.data = &pci_thunder_ecam_ops,
},
{ },
};
static int thunder_ecam_probe(struct platform_device *pdev)
{
return pci_host_common_probe(pdev, &pci_thunder_ecam_ops);
}
static struct platform_driver thunder_ecam_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = thunder_ecam_of_match,
.suppress_bind_attrs = true,
},
.probe = thunder_ecam_probe,
.probe = pci_host_common_probe,
};
builtin_platform_driver(thunder_ecam_driver);

16
drivers/pci/controller/pci-thunder-pem.c
View File

@ -403,7 +403,7 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg)
return thunder_pem_init(dev, cfg, res_pem);
}
struct pci_ecam_ops thunder_pem_ecam_ops = {
const struct pci_ecam_ops thunder_pem_ecam_ops = {
.bus_shift = 24,
.init = thunder_pem_acpi_init,
.pci_ops = {
@ -440,7 +440,7 @@ static int thunder_pem_platform_init(struct pci_config_window *cfg)
return thunder_pem_init(dev, cfg, res_pem);
}
static struct pci_ecam_ops pci_thunder_pem_ops = {
static const struct pci_ecam_ops pci_thunder_pem_ops = {
.bus_shift = 24,
.init = thunder_pem_platform_init,
.pci_ops = {
@ -451,22 +451,20 @@ static struct pci_ecam_ops pci_thunder_pem_ops = {
};
static const struct of_device_id thunder_pem_of_match[] = {
{ .compatible = "cavium,pci-host-thunder-pem" },
{
.compatible = "cavium,pci-host-thunder-pem",
.data = &pci_thunder_pem_ops,
},
{ },
};
static int thunder_pem_probe(struct platform_device *pdev)
{
return pci_host_common_probe(pdev, &pci_thunder_pem_ops);
}
static struct platform_driver thunder_pem_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = thunder_pem_of_match,
.suppress_bind_attrs = true,
},
.probe = thunder_pem_probe,
.probe = pci_host_common_probe,
};
builtin_platform_driver(thunder_pem_driver);

4
drivers/pci/controller/pci-xgene.c
View File

@ -256,7 +256,7 @@ static int xgene_v1_pcie_ecam_init(struct pci_config_window *cfg)
return xgene_pcie_ecam_init(cfg, XGENE_PCIE_IP_VER_1);
}
struct pci_ecam_ops xgene_v1_pcie_ecam_ops = {
const struct pci_ecam_ops xgene_v1_pcie_ecam_ops = {
.bus_shift = 16,
.init = xgene_v1_pcie_ecam_init,
.pci_ops = {
@ -271,7 +271,7 @@ static int xgene_v2_pcie_ecam_init(struct pci_config_window *cfg)
return xgene_pcie_ecam_init(cfg, XGENE_PCIE_IP_VER_2);
}
struct pci_ecam_ops xgene_v2_pcie_ecam_ops = {
const struct pci_ecam_ops xgene_v2_pcie_ecam_ops = {
.bus_shift = 16,
.init = xgene_v2_pcie_ecam_init,
.pci_ops = {

9
drivers/pci/controller/pcie-tango.c
View File

@ -207,7 +207,7 @@ static int smp8759_config_write(struct pci_bus *bus, unsigned int devfn,
return ret;
}
static struct pci_ecam_ops smp8759_ecam_ops = {
static const struct pci_ecam_ops smp8759_ecam_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
@ -295,11 +295,14 @@ static int tango_pcie_probe(struct platform_device *pdev)
spin_lock_init(&pcie->used_msi_lock);
irq_set_chained_handler_and_data(virq, tango_msi_isr, pcie);
return pci_host_common_probe(pdev, &smp8759_ecam_ops);
return pci_host_common_probe(pdev);
}
static const struct of_device_id tango_pcie_ids[] = {
{ .compatible = "sigma,smp8759-pcie" },
{
.compatible = "sigma,smp8759-pcie",
.data = &smp8759_ecam_ops,
},
{ },
};

10
drivers/pci/ecam.c
View File

@ -26,7 +26,7 @@ static const bool per_bus_mapping = !IS_ENABLED(CONFIG_64BIT);
*/
struct pci_config_window *pci_ecam_create(struct device *dev,
struct resource *cfgres, struct resource *busr,
struct pci_ecam_ops *ops)
const struct pci_ecam_ops *ops)
{
struct pci_config_window *cfg;
unsigned int bus_range, bus_range_max, bsz;
@ -101,6 +101,7 @@ err_exit:
pci_ecam_free(cfg);
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(pci_ecam_create);
void pci_ecam_free(struct pci_config_window *cfg)
{
@ -121,6 +122,7 @@ void pci_ecam_free(struct pci_config_window *cfg)
release_resource(&cfg->res);
kfree(cfg);
}
EXPORT_SYMBOL_GPL(pci_ecam_free);
/*
* Function to implement the pci_ops ->map_bus method
@ -143,9 +145,10 @@ void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
base = cfg->win + (busn << cfg->ops->bus_shift);
return base + (devfn << devfn_shift) + where;
}
EXPORT_SYMBOL_GPL(pci_ecam_map_bus);
/* ECAM ops */
struct pci_ecam_ops pci_generic_ecam_ops = {
const struct pci_ecam_ops pci_generic_ecam_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
@ -153,10 +156,11 @@ struct pci_ecam_ops pci_generic_ecam_ops = {
.write = pci_generic_config_write,
}
};
EXPORT_SYMBOL_GPL(pci_generic_ecam_ops);
#if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
/* ECAM ops for 32-bit access only (non-compliant) */
struct pci_ecam_ops pci_32b_ops = {
const struct pci_ecam_ops pci_32b_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_ecam_map_bus,

1
drivers/pci/setup-bus.c
View File

@ -26,6 +26,7 @@
#include "pci.h"
unsigned int pci_flags;
EXPORT_SYMBOL_GPL(pci_flags);
struct pci_dev_resource {
struct list_head list;

2
include/linux/pci-acpi.h
View File

@ -27,7 +27,7 @@ extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle);
struct pci_ecam_ops;
extern int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
struct pci_ecam_ops **ecam_ops);
const struct pci_ecam_ops **ecam_ops);
static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{

25
include/linux/pci-ecam.h
View File

@ -29,7 +29,7 @@ struct pci_config_window {
struct resource res;
struct resource busr;
void *priv;
struct pci_ecam_ops *ops;
const struct pci_ecam_ops *ops;
union {
void __iomem *win; /* 64-bit single mapping */
void __iomem **winp; /* 32-bit per-bus mapping */
@ -40,29 +40,28 @@ struct pci_config_window {
/* create and free pci_config_window */
struct pci_config_window *pci_ecam_create(struct device *dev,
struct resource *cfgres, struct resource *busr,
struct pci_ecam_ops *ops);
const struct pci_ecam_ops *ops);
void pci_ecam_free(struct pci_config_window *cfg);
/* map_bus when ->sysdata is an instance of pci_config_window */
void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
int where);
/* default ECAM ops */
extern struct pci_ecam_ops pci_generic_ecam_ops;
extern const struct pci_ecam_ops pci_generic_ecam_ops;
#if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
extern struct pci_ecam_ops pci_32b_ops; /* 32-bit accesses only */
extern struct pci_ecam_ops hisi_pcie_ops; /* HiSilicon */
extern struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */
extern struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */
extern struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */
extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */
extern struct pci_ecam_ops al_pcie_ops; /* Amazon Annapurna Labs PCIe */
extern const struct pci_ecam_ops pci_32b_ops; /* 32-bit accesses only */
extern const struct pci_ecam_ops hisi_pcie_ops; /* HiSilicon */
extern const struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */
extern const struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */
extern const struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */
extern const struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */
extern const struct pci_ecam_ops al_pcie_ops; /* Amazon Annapurna Labs PCIe */
#endif
#ifdef CONFIG_PCI_HOST_COMMON
#if IS_ENABLED(CONFIG_PCI_HOST_COMMON)
/* for DT-based PCI controllers that support ECAM */
int pci_host_common_probe(struct platform_device *pdev,
struct pci_ecam_ops *ops);
int pci_host_common_probe(struct platform_device *pdev);
int pci_host_common_remove(struct platform_device *pdev);
#endif
#endif