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  * enum iproc_pcie_type - iProc PCIe interface type
11  * @IPROC_PCIE_PAXB_BCMA: BCMA-based host controllers
12  * @IPROC_PCIE_PAXB:	  PAXB-based host controllers for
13  *			  NS, NSP, Cygnus, NS2, and Pegasus SOCs
14  * @IPROC_PCIE_PAXB_V2:   PAXB-based host controllers for Stingray SoCs
15  * @IPROC_PCIE_PAXC:	  PAXC-based host controllers
16  * @IPROC_PCIE_PAXC_V2:   PAXC-based host controllers (second generation)
17  *
18  * PAXB is the wrapper used in root complex that can be connected to an
19  * external endpoint device.
20  *
21  * PAXC is the wrapper used in root complex dedicated for internal emulated
22  * endpoint devices.
23  */
24 enum iproc_pcie_type {
25 	IPROC_PCIE_PAXB_BCMA = 0,
26 	IPROC_PCIE_PAXB,
27 	IPROC_PCIE_PAXB_V2,
28 	IPROC_PCIE_PAXC,
29 	IPROC_PCIE_PAXC_V2,
30 };
31 
32 /**
33  * struct iproc_pcie_ob - iProc PCIe outbound mapping
34  * @axi_offset: offset from the AXI address to the internal address used by
35  * the iProc PCIe core
36  * @nr_windows: total number of supported outbound mapping windows
37  */
38 struct iproc_pcie_ob {
39 	resource_size_t axi_offset;
40 	unsigned int nr_windows;
41 };
42 
43 /**
44  * struct iproc_pcie_ib - iProc PCIe inbound mapping
45  * @nr_regions: total number of supported inbound mapping regions
46  */
47 struct iproc_pcie_ib {
48 	unsigned int nr_regions;
49 };
50 
51 struct iproc_pcie_ob_map;
52 struct iproc_pcie_ib_map;
53 struct iproc_msi;
54 
55 /**
56  * struct iproc_pcie - iProc PCIe device
57  * @dev: pointer to device data structure
58  * @type: iProc PCIe interface type
59  * @reg_offsets: register offsets
60  * @base: PCIe host controller I/O register base
61  * @base_addr: PCIe host controller register base physical address
62  * @mem: host bridge memory window resource
63  * @phy: optional PHY device that controls the Serdes
64  * @map_irq: function callback to map interrupts
65  * @ep_is_internal: indicates an internal emulated endpoint device is connected
66  * @iproc_cfg_read: indicates the iProc config read function should be used
67  * @rej_unconfig_pf: indicates the root complex needs to detect and reject
68  * enumeration against unconfigured physical functions emulated in the ASIC
69  * @has_apb_err_disable: indicates the controller can be configured to prevent
70  * unsupported request from being forwarded as an APB bus error
71  * @fix_paxc_cap: indicates the controller has corrupted capability list in its
72  * config space registers and requires SW based fixup
73  *
74  * @need_ob_cfg: indicates SW needs to configure the outbound mapping window
75  * @ob: outbound mapping related parameters
76  * @ob_map: outbound mapping related parameters specific to the controller
77  *
78  * @need_ib_cfg: indicates SW needs to configure the inbound mapping window
79  * @ib: inbound mapping related parameters
80  * @ib_map: outbound mapping region related parameters
81  *
82  * @need_msi_steer: indicates additional configuration of the iProc PCIe
83  * controller is required to steer MSI writes to external interrupt controller
84  * @msi: MSI data
85  */
86 struct iproc_pcie {
87 	struct device *dev;
88 	enum iproc_pcie_type type;
89 	u16 *reg_offsets;
90 	void __iomem *base;
91 	phys_addr_t base_addr;
92 	struct resource mem;
93 	struct phy *phy;
94 	int (*map_irq)(const struct pci_dev *, u8, u8);
95 	bool ep_is_internal;
96 	bool iproc_cfg_read;
97 	bool rej_unconfig_pf;
98 	bool has_apb_err_disable;
99 	bool fix_paxc_cap;
100 
101 	bool need_ob_cfg;
102 	struct iproc_pcie_ob ob;
103 	const struct iproc_pcie_ob_map *ob_map;
104 
105 	bool need_ib_cfg;
106 	struct iproc_pcie_ib ib;
107 	const struct iproc_pcie_ib_map *ib_map;
108 
109 	bool need_msi_steer;
110 	struct iproc_msi *msi;
111 };
112 
113 int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
114 void iproc_pcie_remove(struct iproc_pcie *pcie);
115 int iproc_pcie_shutdown(struct iproc_pcie *pcie);
116 
117 #ifdef CONFIG_PCIE_IPROC_MSI
118 int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node);
119 void iproc_msi_exit(struct iproc_pcie *pcie);
120 #else
iproc_msi_init(struct iproc_pcie * pcie,struct device_node * node)121 static inline int iproc_msi_init(struct iproc_pcie *pcie,
122 				 struct device_node *node)
123 {
124 	return -ENODEV;
125 }
iproc_msi_exit(struct iproc_pcie * pcie)126 static inline void iproc_msi_exit(struct iproc_pcie *pcie)
127 {
128 }
129 #endif
130 
131 #endif /* _PCIE_IPROC_H */
132