tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Copyright 2016 Broadcom
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2, as
6 * published by the Free Software Foundation (the "GPL").
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License version 2 (GPLv2) for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * version 2 (GPLv2) along with this source code.
15 */
16#ifndef DRIVERS_PCI_ECAM_H
17#define DRIVERS_PCI_ECAM_H
18
19#include <linux/kernel.h>
20#include <linux/platform_device.h>
21
22/*
23 * struct to hold pci ops and bus shift of the config window
24 * for a PCI controller.
25 */
26struct pci_config_window;
27struct pci_ecam_ops {
28 unsigned int bus_shift;
29 struct pci_ops pci_ops;
30 int (*init)(struct pci_config_window *);
31};
32
33/*
34 * struct to hold the mappings of a config space window. This
35 * is expected to be used as sysdata for PCI controllers that
36 * use ECAM.
37 */
38struct pci_config_window {
39 struct resource res;
40 struct resource busr;
41 void *priv;
42 struct pci_ecam_ops *ops;
43 union {
44 void __iomem *win; /* 64-bit single mapping */
45 void __iomem **winp; /* 32-bit per-bus mapping */
46 };
47 struct device *parent;/* ECAM res was from this dev */
48};
49
50/* create and free pci_config_window */
51struct pci_config_window *pci_ecam_create(struct device *dev,
52 struct resource *cfgres, struct resource *busr,
53 struct pci_ecam_ops *ops);
54void pci_ecam_free(struct pci_config_window *cfg);
55
56/* map_bus when ->sysdata is an instance of pci_config_window */
57void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
58 int where);
59/* default ECAM ops */
60extern struct pci_ecam_ops pci_generic_ecam_ops;
61
62#ifdef CONFIG_PCI_HOST_GENERIC
63/* for DT-based PCI controllers that support ECAM */
64int pci_host_common_probe(struct platform_device *pdev,
65 struct pci_ecam_ops *ops);
66#endif
67#endif