1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2014-2015 Broadcom Corporation
4 */
5
6 #ifndef _PCIE_IPROC_H
7 #define _PCIE_IPROC_H
8
9 /**
10 * iProc PCIe interface type
11 *
12 * PAXB is the wrapper used in root complex that can be connected to an
13 * external endpoint device.
14 *
15 * PAXC is the wrapper used in root complex dedicated for internal emulated
16 * endpoint devices.
17 */
18 enum iproc_pcie_type {
19 IPROC_PCIE_PAXB_BCMA = 0,
20 IPROC_PCIE_PAXB,
21 IPROC_PCIE_PAXB_V2,
22 IPROC_PCIE_PAXC,
23 IPROC_PCIE_PAXC_V2,
24 };
25
26 /**
27 * iProc PCIe outbound mapping
28 * @axi_offset: offset from the AXI address to the internal address used by
29 * the iProc PCIe core
30 * @nr_windows: total number of supported outbound mapping windows
31 */
32 struct iproc_pcie_ob {
33 resource_size_t axi_offset;
34 unsigned int nr_windows;
35 };
36
37 /**
38 * iProc PCIe inbound mapping
39 * @nr_regions: total number of supported inbound mapping regions
40 */
41 struct iproc_pcie_ib {
42 unsigned int nr_regions;
43 };
44
45 struct iproc_pcie_ob_map;
46 struct iproc_pcie_ib_map;
47 struct iproc_msi;
48
49 /**
50 * iProc PCIe device
51 *
52 * @dev: pointer to device data structure
53 * @type: iProc PCIe interface type
54 * @reg_offsets: register offsets
55 * @base: PCIe host controller I/O register base
56 * @base_addr: PCIe host controller register base physical address
57 * @root_bus: pointer to root bus
58 * @phy: optional PHY device that controls the Serdes
59 * @map_irq: function callback to map interrupts
60 * @ep_is_internal: indicates an internal emulated endpoint device is connected
61 * @iproc_cfg_read: indicates the iProc config read function should be used
62 * @rej_unconfig_pf: indicates the root complex needs to detect and reject
63 * enumeration against unconfigured physical functions emulated in the ASIC
64 * @has_apb_err_disable: indicates the controller can be configured to prevent
65 * unsupported request from being forwarded as an APB bus error
66 * @fix_paxc_cap: indicates the controller has corrupted capability list in its
67 * config space registers and requires SW based fixup
68 *
69 * @need_ob_cfg: indicates SW needs to configure the outbound mapping window
70 * @ob: outbound mapping related parameters
71 * @ob_map: outbound mapping related parameters specific to the controller
72 *
73 * @need_ib_cfg: indicates SW needs to configure the inbound mapping window
74 * @ib: inbound mapping related parameters
75 * @ib_map: outbound mapping region related parameters
76 *
77 * @need_msi_steer: indicates additional configuration of the iProc PCIe
78 * controller is required to steer MSI writes to external interrupt controller
79 * @msi: MSI data
80 */
81 struct iproc_pcie {
82 struct device *dev;
83 enum iproc_pcie_type type;
84 u16 *reg_offsets;
85 void __iomem *base;
86 phys_addr_t base_addr;
87 struct resource mem;
88 struct pci_bus *root_bus;
89 struct phy *phy;
90 int (*map_irq)(const struct pci_dev *, u8, u8);
91 bool ep_is_internal;
92 bool iproc_cfg_read;
93 bool rej_unconfig_pf;
94 bool has_apb_err_disable;
95 bool fix_paxc_cap;
96
97 bool need_ob_cfg;
98 struct iproc_pcie_ob ob;
99 const struct iproc_pcie_ob_map *ob_map;
100
101 bool need_ib_cfg;
102 struct iproc_pcie_ib ib;
103 const struct iproc_pcie_ib_map *ib_map;
104
105 bool need_msi_steer;
106 struct iproc_msi *msi;
107 };
108
109 int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
110 int iproc_pcie_remove(struct iproc_pcie *pcie);
111 int iproc_pcie_shutdown(struct iproc_pcie *pcie);
112
113 #ifdef CONFIG_PCIE_IPROC_MSI
114 int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node);
115 void iproc_msi_exit(struct iproc_pcie *pcie);
116 #else
iproc_msi_init(struct iproc_pcie * pcie,struct device_node * node)117 static inline int iproc_msi_init(struct iproc_pcie *pcie,
118 struct device_node *node)
119 {
120 return -ENODEV;
121 }
iproc_msi_exit(struct iproc_pcie * pcie)122 static inline void iproc_msi_exit(struct iproc_pcie *pcie)
123 {
124 }
125 #endif
126
127 #endif /* _PCIE_IPROC_H */
128
