1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Brocade Communications Systems, Inc.
3 * Author: Jan Blunck <jblunck@infradead.org>
6 #ifndef _RTE_ETHDEV_PCI_H_
7 #define _RTE_ETHDEV_PCI_H_
9 #include <rte_malloc.h>
11 #include <rte_bus_pci.h>
12 #include <rte_config.h>
13 #include <rte_ethdev_driver.h>
16 * Copy pci device info to the Ethernet device data.
17 * Shared memory (eth_dev->data) only updated by primary process, so it is safe
18 * to call this function from both primary and secondary processes.
21 * The *eth_dev* pointer is the address of the *rte_eth_dev* structure.
23 * The *pci_dev* pointer is the address of the *rte_pci_device* structure.
26 rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
27 struct rte_pci_device *pci_dev)
29 if ((eth_dev == NULL) || (pci_dev == NULL)) {
30 RTE_ETHDEV_LOG(ERR, "NULL pointer eth_dev=%p pci_dev=%p",
31 (void *)eth_dev, (void *)pci_dev);
35 eth_dev->intr_handle = &pci_dev->intr_handle;
37 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
38 eth_dev->data->dev_flags = 0;
39 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
40 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
41 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
42 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
44 eth_dev->data->numa_node = pci_dev->device.numa_node;
49 eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device) {
50 struct rte_pci_device *pci_dev = bus_device;
55 rte_eth_copy_pci_info(eth_dev, pci_dev);
62 * Allocates a new ethdev slot for an ethernet device and returns the pointer
63 * to that slot for the driver to use.
66 * Pointer to the PCI device
68 * @param private_data_size
69 * Size of private data structure
72 * A pointer to a rte_eth_dev or NULL if allocation failed.
74 static inline struct rte_eth_dev *
75 rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
77 struct rte_eth_dev *eth_dev;
83 name = dev->device.name;
85 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
86 eth_dev = rte_eth_dev_allocate(name);
90 if (private_data_size) {
91 eth_dev->data->dev_private = rte_zmalloc_socket(name,
92 private_data_size, RTE_CACHE_LINE_SIZE,
93 dev->device.numa_node);
94 if (!eth_dev->data->dev_private) {
95 rte_eth_dev_release_port(eth_dev);
100 eth_dev = rte_eth_dev_attach_secondary(name);
105 eth_dev->device = &dev->device;
106 rte_eth_copy_pci_info(eth_dev, dev);
111 rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
113 eth_dev->device = NULL;
114 eth_dev->intr_handle = NULL;
116 /* free ether device */
117 rte_eth_dev_release_port(eth_dev);
120 typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);
124 * Wrapper for use by pci drivers in a .probe function to attach to a ethdev
128 rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
129 size_t private_data_size, eth_dev_pci_callback_t dev_init)
131 struct rte_eth_dev *eth_dev;
134 eth_dev = rte_eth_dev_pci_allocate(pci_dev, private_data_size);
138 RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
139 ret = dev_init(eth_dev);
141 rte_eth_dev_pci_release(eth_dev);
143 rte_eth_dev_probing_finish(eth_dev);
150 * Wrapper for use by pci drivers in a .remove function to detach a ethdev
154 rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
155 eth_dev_pci_callback_t dev_uninit)
157 struct rte_eth_dev *eth_dev;
160 eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
165 ret = dev_uninit(eth_dev);
170 rte_eth_dev_pci_release(eth_dev);
174 #endif /* _RTE_ETHDEV_PCI_H_ */