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
42 * - Slot in the rte_dev_devices array for a new device;
44 struct rte_eth_dev *rte_eth_dev_allocate(const char *name);
48 * Attach to the ethdev already initialized by the primary
51 * @param name Ethernet device's name.
53 * - Success: Slot in the rte_dev_devices array for attached
55 * - Error: Null pointer.
57 struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name);
61 * Notify RTE_ETH_EVENT_DESTROY and release the specified ethdev port.
63 * The following PMD-managed data fields will be freed:
67 * If one of these fields should not be freed,
68 * it must be reset to NULL by the PMD, typically in dev_close method.
71 * Device to be detached.
73 * - 0 on success, negative on error
75 int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev);
79 * Release device queues and clear its configuration to force the user
80 * application to reconfigure it. It is for internal use only.
83 * Pointer to struct rte_eth_dev.
88 void _rte_eth_dev_reset(struct rte_eth_dev *dev);
91 * @internal Executes all the user application registered callbacks for
92 * the specific device. It is for DPDK internal user only. User
93 * application should not call it directly.
96 * Pointer to struct rte_eth_dev.
98 * Eth device interrupt event type.
100 * To pass data back to user application.
101 * This allows the user application to decide if a particular function
102 * is permitted or not.
107 int _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
108 enum rte_eth_event_type event, void *ret_param);
112 * This is the last step of device probing.
113 * It must be called after a port is allocated and initialized successfully.
115 * The notification RTE_ETH_EVENT_NEW is sent to other entities
116 * (libraries and applications).
117 * The state is set as RTE_ETH_DEV_ATTACHED.
122 void rte_eth_dev_probing_finish(struct rte_eth_dev *dev);
125 * Create memzone for HW rings.
126 * malloc can't be used as the physical address is needed.
127 * If the memzone is already created, then this function returns a ptr
131 * The *eth_dev* pointer is the address of the *rte_eth_dev* structure
133 * The name of the memory zone
135 * The index of the queue to add to name
137 * The sizeof of the memory area
139 * Alignment for resulting memzone. Must be a power of 2.
141 * The *socket_id* argument is the socket identifier in case of NUMA.
143 const struct rte_memzone *
144 rte_eth_dma_zone_reserve(const struct rte_eth_dev *eth_dev, const char *name,
145 uint16_t queue_id, size_t size,
146 unsigned align, int socket_id);
150 * Atomically set the link status for the specific device.
151 * It is for use by DPDK device driver use only.
152 * User applications should not call it
155 * Pointer to struct rte_eth_dev.
157 * New link status value.
159 * Same convention as eth_link_update operation.
160 * 0 if link up status has changed
161 * -1 if link up status was unchanged
164 rte_eth_linkstatus_set(struct rte_eth_dev *dev,
165 const struct rte_eth_link *new_link)
167 volatile uint64_t *dev_link
168 = (volatile uint64_t *)&(dev->data->dev_link);
171 struct rte_eth_link link;
174 RTE_BUILD_BUG_ON(sizeof(*new_link) != sizeof(uint64_t));
176 orig.val64 = rte_atomic64_exchange(dev_link,
177 *(const uint64_t *)new_link);
179 return (orig.link.link_status == new_link->link_status) ? -1 : 0;
184 * Atomically get the link speed and status.
187 * Pointer to struct rte_eth_dev.
192 rte_eth_linkstatus_get(const struct rte_eth_dev *dev,
193 struct rte_eth_link *link)
195 volatile uint64_t *src = (uint64_t *)&(dev->data->dev_link);
196 uint64_t *dst = (uint64_t *)link;
198 RTE_BUILD_BUG_ON(sizeof(*link) != sizeof(uint64_t));
201 /* if cpu arch has 64 bit unsigned lon then implicitly atomic */
204 /* can't use rte_atomic64_read because it returns signed int */
207 } while (!rte_atomic64_cmpset(src, *dst, *dst));
213 * @b EXPERIMENTAL: this API may change without prior notice.
215 * Allocate an unique switch domain identifier.
217 * A pool of switch domain identifiers which can be allocated on request. This
218 * will enabled devices which support the concept of switch domains to request
219 * a switch domain id which is guaranteed to be unique from other devices
220 * running in the same process.
223 * switch domain identifier parameter to pass back to application
226 * Negative errno value on error, 0 on success.
230 rte_eth_switch_domain_alloc(uint16_t *domain_id);
234 * @b EXPERIMENTAL: this API may change without prior notice.
236 * Free switch domain.
238 * Return a switch domain identifier to the pool of free identifiers after it is
239 * no longer in use by device.
242 * switch domain identifier to free
245 * Negative errno value on error, 0 on success.
249 rte_eth_switch_domain_free(uint16_t domain_id);
251 /** Generic Ethernet device arguments */
252 struct rte_eth_devargs {
253 uint16_t ports[RTE_MAX_ETHPORTS];
254 /** port/s number to enable on a multi-port single function */
256 /** number of ports in ports field */
257 uint16_t representor_ports[RTE_MAX_ETHPORTS];
258 /** representor port/s identifier to enable on device */
259 uint16_t nb_representor_ports;
260 /** number of ports in representor port field */
265 * @b EXPERIMENTAL: this API may change without prior notice.
267 * PMD helper function to parse ethdev arguments
272 * parsed ethdev specific arguments.
275 * Negative errno value on error, 0 on success.
279 rte_eth_devargs_parse(const char *devargs, struct rte_eth_devargs *eth_devargs);
282 typedef int (*ethdev_init_t)(struct rte_eth_dev *ethdev, void *init_params);
283 typedef int (*ethdev_bus_specific_init)(struct rte_eth_dev *ethdev,
284 void *bus_specific_init_params);
288 * @b EXPERIMENTAL: this API may change without prior notice.
290 * PMD helper function for the creation of a new ethdev ports.
296 * @param priv_data_size
297 * size of private data required for port.
298 * @param bus_specific_init
299 * port bus specific initialisation callback function
300 * @param bus_init_params
301 * port bus specific initialisation parameters
303 * device specific port initialization callback function
305 * port initialisation parameters
308 * Negative errno value on error, 0 on success.
312 rte_eth_dev_create(struct rte_device *device, const char *name,
313 size_t priv_data_size,
314 ethdev_bus_specific_init bus_specific_init, void *bus_init_params,
315 ethdev_init_t ethdev_init, void *init_params);
318 typedef int (*ethdev_uninit_t)(struct rte_eth_dev *ethdev);
322 * @b EXPERIMENTAL: this API may change without prior notice.
324 * PMD helper function for cleaning up the resources of a ethdev port on it's
328 * ethdev handle of port.
329 * @param ethdev_uninit
330 * device specific port un-initialise callback function
333 * Negative errno value on error, 0 on success.
337 rte_eth_dev_destroy(struct rte_eth_dev *ethdev, ethdev_uninit_t ethdev_uninit);
343 #endif /* _RTE_ETHDEV_DRIVER_H_ */