1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 6WIND S.A.
5 #ifndef _PCI_PRIVATE_H_
6 #define _PCI_PRIVATE_H_
11 #include <rte_bus_pci.h>
13 extern struct rte_pci_bus rte_pci_bus;
15 struct rte_pci_driver;
16 struct rte_pci_device;
18 extern struct rte_pci_bus rte_pci_bus;
21 * Scan the content of the PCI bus, and the devices in the devices
25 * 0 on success, negative on error
27 int rte_pci_scan(void);
30 * Find the name of a PCI device.
33 pci_name_set(struct rte_pci_device *dev);
36 * Validate whether a device with given PCI address should be ignored or not.
39 * PCI address of device to be validated
41 * true: if device is to be ignored,
42 * false: if device is to be scanned,
44 bool rte_pci_ignore_device(const struct rte_pci_addr *pci_addr);
47 * Add a PCI device to the PCI Bus (append to PCI Device list). This function
48 * also updates the bus references of the PCI Device (and the generic device
49 * object embedded within.
55 void rte_pci_add_device(struct rte_pci_device *pci_dev);
58 * Insert a PCI device in the PCI Bus at a particular location in the device
59 * list. It also updates the PCI Bus reference of the new devices to be
62 * @param exist_pci_dev
63 * Existing PCI device in PCI Bus
65 * PCI device to be added before exist_pci_dev
68 void rte_pci_insert_device(struct rte_pci_device *exist_pci_dev,
69 struct rte_pci_device *new_pci_dev);
72 * Update a pci device object by asking the kernel for the latest information.
74 * This function is private to EAL.
77 * The PCI Bus-Device-Function address to look for
80 * - negative on error.
82 int pci_update_device(const struct rte_pci_addr *addr);
85 * A structure describing a PCI mapping.
95 struct pci_msix_table {
102 * A structure describing a mapped PCI resource.
103 * For multi-process we need to reproduce all PCI mappings in secondary
104 * processes, so save them in a tailq.
106 struct mapped_pci_resource {
107 TAILQ_ENTRY(mapped_pci_resource) next;
109 struct rte_pci_addr pci_addr;
112 struct pci_map maps[PCI_MAX_RESOURCE];
113 struct pci_msix_table msix_table;
116 /** mapped pci device list */
117 TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
120 * Map a particular resource from a file.
122 * @param requested_addr
123 * The starting address for the new mapping range.
125 * The file descriptor.
127 * The offset for the mapping range.
129 * The size for the mapping range.
130 * @param additional_flags
131 * The additional rte_mem_map() flags for the mapping range.
133 * - On success, the function returns a pointer to the mapped area.
134 * - On error, NULL is returned.
136 void *pci_map_resource(void *requested_addr, int fd, off_t offset,
137 size_t size, int additional_flags);
140 * Unmap a particular resource.
142 * @param requested_addr
143 * The address for the unmapping range.
145 * The size for the unmapping range.
147 void pci_unmap_resource(void *requested_addr, size_t size);
150 * Map the PCI resource of a PCI device in virtual memory
152 * This function is private to EAL.
155 * 0 on success, negative on error
157 int pci_uio_map_resource(struct rte_pci_device *dev);
160 * Unmap the PCI resource of a PCI device
162 * This function is private to EAL.
164 void pci_uio_unmap_resource(struct rte_pci_device *dev);
167 * Allocate uio resource for PCI device
169 * This function is private to EAL.
172 * PCI device to allocate uio resource
174 * Pointer to uio resource.
175 * If the function returns 0, the pointer will be filled.
177 * 0 on success, negative on error
179 int pci_uio_alloc_resource(struct rte_pci_device *dev,
180 struct mapped_pci_resource **uio_res);
183 * Free uio resource for PCI device
185 * This function is private to EAL.
188 * PCI device to free uio resource
190 * Pointer to uio resource.
192 void pci_uio_free_resource(struct rte_pci_device *dev,
193 struct mapped_pci_resource *uio_res);
196 * Remap the PCI resource of a PCI device in anonymous virtual memory.
199 * Point to the struct rte pci device.
201 * - On success, zero.
202 * - On failure, a negative value.
205 pci_uio_remap_resource(struct rte_pci_device *dev);
208 * Map device memory to uio resource
210 * This function is private to EAL.
213 * PCI device that has memory information.
215 * Memory resource index of the PCI device.
217 * uio resource that will keep mapping information.
219 * Mapping information index of the uio resource.
221 * 0 on success, negative on error
223 int pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
224 struct mapped_pci_resource *uio_res, int map_idx);
227 * Match the PCI Driver and Device using the ID Table
230 * PCI driver from which ID table would be extracted
232 * PCI device to match against the driver
234 * 1 for successful match
235 * 0 for unsuccessful match
238 rte_pci_match(const struct rte_pci_driver *pci_drv,
239 const struct rte_pci_device *pci_dev);
242 * OS specific callbacks for rte_pci_get_iommu_class
246 pci_device_iommu_support_va(const struct rte_pci_device *dev);
249 pci_device_iova_mode(const struct rte_pci_driver *pci_drv,
250 const struct rte_pci_device *pci_dev);
253 * Get iommu class of PCI devices on the bus.
254 * And return their preferred iova mapping mode.
257 * - enum rte_iova_mode.
260 rte_pci_get_iommu_class(void);
263 * Iterate over internal devices,
264 * matching any device against the provided
268 * Iteration starting point.
271 * Device string to match against.
274 * (unused) iterator structure.
277 * A pointer to the next matching device if any.
281 rte_pci_dev_iterate(const void *start,
283 const struct rte_dev_iterator *it);
285 #endif /* _PCI_PRIVATE_H_ */