mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 18:15:09 +07:00
b2f75a41ea
Most ECAM host drivers are just different pci_ecam_ops which can be DT match table data. That's already the case in some cases, but let's do that for all the ECAM drivers. Then we can use of_device_get_match_data() in pci_host_common_probe() and eliminate the probe wrapper functions and use pci_host_common_probe() directly for probe. Link: https://lore.kernel.org/r/20200409234923.21598-4-robh@kernel.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Zhou Wang <wangzhou1@hisilicon.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Andrew Murray <amurray@thegoodpenguin.co.uk> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Will Deacon <will@kernel.org> Cc: Robert Richter <rrichter@marvell.com> Cc: Marc Gonzalez <marc.w.gonzalez@free.fr> Cc: Mans Rullgard <mans@mansr.com> Cc: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Simple, generic PCI host controller driver targeting firmware-initialised
|
|
* systems and virtual machines (e.g. the PCI emulation provided by kvmtool).
|
|
*
|
|
* Copyright (C) 2014 ARM Limited
|
|
*
|
|
* Author: Will Deacon <will.deacon@arm.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci-ecam.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
|
|
.bus_shift = 16,
|
|
.pci_ops = {
|
|
.map_bus = pci_ecam_map_bus,
|
|
.read = pci_generic_config_read,
|
|
.write = pci_generic_config_write,
|
|
}
|
|
};
|
|
|
|
static bool pci_dw_valid_device(struct pci_bus *bus, unsigned int devfn)
|
|
{
|
|
struct pci_config_window *cfg = bus->sysdata;
|
|
|
|
/*
|
|
* The Synopsys DesignWare PCIe controller in ECAM mode will not filter
|
|
* type 0 config TLPs sent to devices 1 and up on its downstream port,
|
|
* resulting in devices appearing multiple times on bus 0 unless we
|
|
* filter out those accesses here.
|
|
*/
|
|
if (bus->number == cfg->busr.start && PCI_SLOT(devfn) > 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void __iomem *pci_dw_ecam_map_bus(struct pci_bus *bus,
|
|
unsigned int devfn, int where)
|
|
{
|
|
if (!pci_dw_valid_device(bus, devfn))
|
|
return NULL;
|
|
|
|
return pci_ecam_map_bus(bus, devfn, where);
|
|
}
|
|
|
|
static const struct pci_ecam_ops pci_dw_ecam_bus_ops = {
|
|
.bus_shift = 20,
|
|
.pci_ops = {
|
|
.map_bus = pci_dw_ecam_map_bus,
|
|
.read = pci_generic_config_read,
|
|
.write = pci_generic_config_write,
|
|
}
|
|
};
|
|
|
|
static const struct of_device_id gen_pci_of_match[] = {
|
|
{ .compatible = "pci-host-cam-generic",
|
|
.data = &gen_pci_cfg_cam_bus_ops },
|
|
|
|
{ .compatible = "pci-host-ecam-generic",
|
|
.data = &pci_generic_ecam_ops },
|
|
|
|
{ .compatible = "marvell,armada8k-pcie-ecam",
|
|
.data = &pci_dw_ecam_bus_ops },
|
|
|
|
{ .compatible = "socionext,synquacer-pcie-ecam",
|
|
.data = &pci_dw_ecam_bus_ops },
|
|
|
|
{ .compatible = "snps,dw-pcie-ecam",
|
|
.data = &pci_dw_ecam_bus_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,
|
|
},
|
|
.probe = pci_host_common_probe,
|
|
.remove = pci_host_common_remove,
|
|
};
|
|
module_platform_driver(gen_pci_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|