1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
5 #ifndef _RTE_ETHDEV_DRIVER_H_
6 #define _RTE_ETHDEV_DRIVER_H_
11 * RTE Ethernet Device PMD API
13 * These APIs for the use from Ethernet drivers, user applications shouldn't
18 #include <rte_ethdev.h>
26 * Returns a ethdev slot specified by the unique identifier name.
29 * The pointer to the Unique identifier name for each Ethernet device
31 * - The pointer to the ethdev slot, on success. NULL on error
33 struct rte_eth_dev *rte_eth_dev_allocated(const char *name);
37 * Allocates a new ethdev slot for an ethernet device and returns the pointer
38 * to that slot for the driver to use.
40 * @param name Unique identifier name for each Ethernet device
41 * @param type Device type of this Ethernet device
43 * - Slot in the rte_dev_devices array for a new device;
45 struct rte_eth_dev *rte_eth_dev_allocate(const char *name);
49 * Attach to the ethdev already initialized by the primary
52 * @param name Ethernet device's name.
54 * - Success: Slot in the rte_dev_devices array for attached
56 * - Error: Null pointer.
58 struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name);
62 * Release the specified ethdev port.
65 * The *eth_dev* pointer is the address of the *rte_eth_dev* structure.
67 * - 0 on success, negative on error
69 int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev);
73 * Release device queues and clear its configuration to force the user
74 * application to reconfigure it. It is for internal use only.
77 * Pointer to struct rte_eth_dev.
82 void _rte_eth_dev_reset(struct rte_eth_dev *dev);
85 * @internal Executes all the user application registered callbacks for
86 * the specific device. It is for DPDK internal user only. User
87 * application should not call it directly.
90 * Pointer to struct rte_eth_dev.
92 * Eth device interrupt event type.
94 * To pass data back to user application.
95 * This allows the user application to decide if a particular function
96 * is permitted or not.
101 int _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
102 enum rte_eth_event_type event, void *ret_param);
106 * This is the last step of device probing.
107 * It must be called after a port is allocated and initialized successfully.
112 void rte_eth_dev_probing_finish(struct rte_eth_dev *dev);
115 * Create memzone for HW rings.
116 * malloc can't be used as the physical address is needed.
117 * If the memzone is already created, then this function returns a ptr
121 * The *eth_dev* pointer is the address of the *rte_eth_dev* structure
123 * The name of the memory zone
125 * The index of the queue to add to name
127 * The sizeof of the memory area
129 * Alignment for resulting memzone. Must be a power of 2.
131 * The *socket_id* argument is the socket identifier in case of NUMA.
133 const struct rte_memzone *
134 rte_eth_dma_zone_reserve(const struct rte_eth_dev *eth_dev, const char *name,
135 uint16_t queue_id, size_t size,
136 unsigned align, int socket_id);
140 * Atomically set the link status for the specific device.
141 * It is for use by DPDK device driver use only.
142 * User applications should not call it
145 * Pointer to struct rte_eth_dev.
147 * New link status value.
149 * Same convention as eth_link_update operation.
150 * 0 if link up status has changed
151 * -1 if link up status was unchanged
154 rte_eth_linkstatus_set(struct rte_eth_dev *dev,
155 const struct rte_eth_link *new_link)
157 volatile uint64_t *dev_link
158 = (volatile uint64_t *)&(dev->data->dev_link);
161 struct rte_eth_link link;
164 RTE_BUILD_BUG_ON(sizeof(*new_link) != sizeof(uint64_t));
166 orig.val64 = rte_atomic64_exchange(dev_link,
167 *(const uint64_t *)new_link);
169 return (orig.link.link_status == new_link->link_status) ? -1 : 0;
174 * Atomically get the link speed and status.
177 * Pointer to struct rte_eth_dev.
182 rte_eth_linkstatus_get(const struct rte_eth_dev *dev,
183 struct rte_eth_link *link)
185 volatile uint64_t *src = (uint64_t *)&(dev->data->dev_link);
186 uint64_t *dst = (uint64_t *)link;
188 RTE_BUILD_BUG_ON(sizeof(*link) != sizeof(uint64_t));
191 /* if cpu arch has 64 bit unsigned lon then implicitly atomic */
194 /* can't use rte_atomic64_read because it returns signed int */
197 } while (!rte_atomic64_cmpset(src, *dst, *dst));
203 * @b EXPERIMENTAL: this API may change without prior notice.
205 * Allocate an unique switch domain identifier.
207 * A pool of switch domain identifiers which can be allocated on request. This
208 * will enabled devices which support the concept of switch domains to request
209 * a switch domain id which is guaranteed to be unique from other devices
210 * running in the same process.
213 * switch domain identifier parameter to pass back to application
216 * Negative errno value on error, 0 on success.
218 int __rte_experimental
219 rte_eth_switch_domain_alloc(uint16_t *domain_id);
223 * @b EXPERIMENTAL: this API may change without prior notice.
225 * Free switch domain.
227 * Return a switch domain identifier to the pool of free identifiers after it is
228 * no longer in use by device.
231 * switch domain identifier to free
234 * Negative errno value on error, 0 on success.
236 int __rte_experimental
237 rte_eth_switch_domain_free(uint16_t domain_id);
239 /** Generic Ethernet device arguments */
240 struct rte_eth_devargs {
241 uint16_t ports[RTE_MAX_ETHPORTS];
242 /** port/s number to enable on a multi-port single function */
244 /** number of ports in ports field */
245 uint16_t representor_ports[RTE_MAX_ETHPORTS];
246 /** representor port/s identifier to enable on device */
247 uint16_t nb_representor_ports;
248 /** number of ports in representor port field */
253 * @b EXPERIMENTAL: this API may change without prior notice.
255 * PMD helper function to parse ethdev arguments
260 * parsed ethdev specific arguments.
263 * Negative errno value on error, 0 on success.
265 int __rte_experimental
266 rte_eth_devargs_parse(const char *devargs, struct rte_eth_devargs *eth_devargs);
269 typedef int (*ethdev_init_t)(struct rte_eth_dev *ethdev, void *init_params);
270 typedef int (*ethdev_bus_specific_init)(struct rte_eth_dev *ethdev,
271 void *bus_specific_init_params);
275 * @b EXPERIMENTAL: this API may change without prior notice.
277 * PMD helper function for the creation of a new ethdev ports.
283 * @param priv_data_size
284 * size of private data required for port.
285 * @param bus_specific_init
286 * port bus specific initialisation callback function
287 * @param bus_init_params
288 * port bus specific initialisation parameters
290 * device specific port initialization callback function
292 * port initialisation parameters
295 * Negative errno value on error, 0 on success.
297 int __rte_experimental
298 rte_eth_dev_create(struct rte_device *device, const char *name,
299 size_t priv_data_size,
300 ethdev_bus_specific_init bus_specific_init, void *bus_init_params,
301 ethdev_init_t ethdev_init, void *init_params);
304 typedef int (*ethdev_uninit_t)(struct rte_eth_dev *ethdev);
308 * @b EXPERIMENTAL: this API may change without prior notice.
310 * PMD helper function for cleaing up the resources of a ethdev port on it's
314 * ethdev handle of port.
315 * @param ethdev_uninit
316 * device specific port un-initialise callback function
319 * Negative errno value on error, 0 on success.
321 int __rte_experimental
322 rte_eth_dev_destroy(struct rte_eth_dev *ethdev, ethdev_uninit_t ethdev_uninit);
328 #endif /* _RTE_ETHDEV_DRIVER_H_ */