1 /* SPDX-License-Identifier: GPL-2.0 */
3 * PCI Endpoint *Controller* (EPC) header file
5 * Copyright (C) 2017 Texas Instruments
9 #ifndef __LINUX_PCI_EPC_H
10 #define __LINUX_PCI_EPC_H
12 #include <linux/pci-epf.h>
16 enum pci_epc_irq_type {
24 * struct pci_epc_ops - set of function pointers for performing EPC operations
25 * @write_header: ops to populate configuration space header
26 * @set_bar: ops to configure the BAR
27 * @clear_bar: ops to reset the BAR
28 * @map_addr: ops to map CPU address to PCI address
29 * @unmap_addr: ops to unmap CPU address and PCI address
30 * @set_msi: ops to set the requested number of MSI interrupts in the MSI
32 * @get_msi: ops to get the number of MSI interrupts allocated by the RC from
33 * the MSI capability register
34 * @set_msix: ops to set the requested number of MSI-X interrupts in the
35 * MSI-X capability register
36 * @get_msix: ops to get the number of MSI-X interrupts allocated by the RC
37 * from the MSI-X capability register
38 * @raise_irq: ops to raise a legacy, MSI or MSI-X interrupt
39 * @start: ops to start the PCI link
40 * @stop: ops to stop the PCI link
41 * @owner: the module owner containing the ops
44 int (*write_header)(struct pci_epc *epc, u8 func_no,
45 struct pci_epf_header *hdr);
46 int (*set_bar)(struct pci_epc *epc, u8 func_no,
47 struct pci_epf_bar *epf_bar);
48 void (*clear_bar)(struct pci_epc *epc, u8 func_no,
49 struct pci_epf_bar *epf_bar);
50 int (*map_addr)(struct pci_epc *epc, u8 func_no,
51 phys_addr_t addr, u64 pci_addr, size_t size);
52 void (*unmap_addr)(struct pci_epc *epc, u8 func_no,
54 int (*set_msi)(struct pci_epc *epc, u8 func_no, u8 interrupts);
55 int (*get_msi)(struct pci_epc *epc, u8 func_no);
56 int (*set_msix)(struct pci_epc *epc, u8 func_no, u16 interrupts,
57 enum pci_barno, u32 offset);
58 int (*get_msix)(struct pci_epc *epc, u8 func_no);
59 int (*raise_irq)(struct pci_epc *epc, u8 func_no,
60 enum pci_epc_irq_type type, u16 interrupt_num);
61 int (*start)(struct pci_epc *epc);
62 void (*stop)(struct pci_epc *epc);
63 const struct pci_epc_features* (*get_features)(struct pci_epc *epc,
69 * struct pci_epc_mem - address space of the endpoint controller
70 * @phys_base: physical base address of the PCI address space
71 * @size: the size of the PCI address space
72 * @bitmap: bitmap to manage the PCI address space
73 * @pages: number of bits representing the address region
74 * @page_size: size of each page
75 * @lock: mutex to protect bitmap
78 phys_addr_t phys_base;
80 unsigned long *bitmap;
83 /* mutex to protect against concurrent access for memory allocation*/
88 * struct pci_epc - represents the PCI EPC device
89 * @dev: PCI EPC device
90 * @pci_epf: list of endpoint functions present in this EPC device
91 * @ops: function pointers for performing endpoint operations
92 * @mem: address space of the endpoint controller
93 * @max_functions: max number of functions that can be configured in this EPC
94 * @group: configfs group representing the PCI EPC device
95 * @lock: mutex to protect pci_epc ops
96 * @function_num_map: bitmap to manage physical function number
97 * @notifier: used to notify EPF of any EPC events (like linkup)
101 struct list_head pci_epf;
102 const struct pci_epc_ops *ops;
103 struct pci_epc_mem *mem;
105 struct config_group *group;
106 /* mutex to protect against concurrent access of EP controller */
108 unsigned long function_num_map;
109 struct atomic_notifier_head notifier;
113 * struct pci_epc_features - features supported by a EPC device per function
114 * @linkup_notifier: indicate if the EPC device can notify EPF driver on link up
115 * @msi_capable: indicate if the endpoint function has MSI capability
116 * @msix_capable: indicate if the endpoint function has MSI-X capability
117 * @reserved_bar: bitmap to indicate reserved BAR unavailable to function driver
118 * @bar_fixed_64bit: bitmap to indicate fixed 64bit BARs
119 * @bar_fixed_size: Array specifying the size supported by each BAR
120 * @align: alignment size required for BAR buffer allocation
122 struct pci_epc_features {
123 unsigned int linkup_notifier : 1;
124 unsigned int core_init_notifier : 1;
125 unsigned int msi_capable : 1;
126 unsigned int msix_capable : 1;
129 u64 bar_fixed_size[PCI_STD_NUM_BARS];
133 #define to_pci_epc(device) container_of((device), struct pci_epc, dev)
135 #define pci_epc_create(dev, ops) \
136 __pci_epc_create((dev), (ops), THIS_MODULE)
137 #define devm_pci_epc_create(dev, ops) \
138 __devm_pci_epc_create((dev), (ops), THIS_MODULE)
140 #define pci_epc_mem_init(epc, phys_addr, size) \
141 __pci_epc_mem_init((epc), (phys_addr), (size), PAGE_SIZE)
143 static inline void epc_set_drvdata(struct pci_epc *epc, void *data)
145 dev_set_drvdata(&epc->dev, data);
148 static inline void *epc_get_drvdata(struct pci_epc *epc)
150 return dev_get_drvdata(&epc->dev);
154 pci_epc_register_notifier(struct pci_epc *epc, struct notifier_block *nb)
156 return atomic_notifier_chain_register(&epc->notifier, nb);
160 __devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
161 struct module *owner);
163 __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
164 struct module *owner);
165 void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc);
166 void pci_epc_destroy(struct pci_epc *epc);
167 int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
168 void pci_epc_linkup(struct pci_epc *epc);
169 void pci_epc_init_notify(struct pci_epc *epc);
170 void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
171 int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
172 struct pci_epf_header *hdr);
173 int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
174 struct pci_epf_bar *epf_bar);
175 void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
176 struct pci_epf_bar *epf_bar);
177 int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
178 phys_addr_t phys_addr,
179 u64 pci_addr, size_t size);
180 void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
181 phys_addr_t phys_addr);
182 int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts);
183 int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
184 int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
185 enum pci_barno, u32 offset);
186 int pci_epc_get_msix(struct pci_epc *epc, u8 func_no);
187 int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
188 enum pci_epc_irq_type type, u16 interrupt_num);
189 int pci_epc_start(struct pci_epc *epc);
190 void pci_epc_stop(struct pci_epc *epc);
191 const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
193 unsigned int pci_epc_get_first_free_bar(const struct pci_epc_features
195 struct pci_epc *pci_epc_get(const char *epc_name);
196 void pci_epc_put(struct pci_epc *epc);
198 int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size,
200 void pci_epc_mem_exit(struct pci_epc *epc);
201 void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
202 phys_addr_t *phys_addr, size_t size);
203 void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
204 void __iomem *virt_addr, size_t size);
205 #endif /* __LINUX_PCI_EPC_H */