net/virtio: fix incorrect cast of void *
[dpdk.git] / ethdev / ethdev_pci.h
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2017 Brocade Communications Systems, Inc.
3  *   Author: Jan Blunck <jblunck@infradead.org>
4  */
5
6 #ifndef _RTE_ETHDEV_PCI_H_
7 #define _RTE_ETHDEV_PCI_H_
8
9 #include <rte_malloc.h>
10 #include <rte_pci.h>
11 #include <rte_bus_pci.h>
12 #include <rte_config.h>
13 #include <ethdev_driver.h>
14
15 /**
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.
19  *
20  * @param eth_dev
21  * The *eth_dev* pointer is the address of the *rte_eth_dev* structure.
22  * @param pci_dev
23  * The *pci_dev* pointer is the address of the *rte_pci_device* structure.
24  */
25 static inline void
26 rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
27         struct rte_pci_device *pci_dev)
28 {
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);
32                 return;
33         }
34
35         eth_dev->intr_handle = &pci_dev->intr_handle;
36
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;
43
44                 eth_dev->data->numa_node = pci_dev->device.numa_node;
45         }
46 }
47
48 static inline int
49 eth_dev_pci_specific_init(struct rte_eth_dev *eth_dev, void *bus_device) {
50         struct rte_pci_device *pci_dev = bus_device;
51
52         if (!pci_dev)
53                 return -ENODEV;
54
55         rte_eth_copy_pci_info(eth_dev, pci_dev);
56
57         return 0;
58 }
59
60 /**
61  * @internal
62  * Allocates a new ethdev slot for an ethernet device and returns the pointer
63  * to that slot for the driver to use.
64  *
65  * @param dev
66  *      Pointer to the PCI device
67  *
68  * @param private_data_size
69  *      Size of private data structure
70  *
71  * @return
72  *      A pointer to a rte_eth_dev or NULL if allocation failed.
73  */
74 static inline struct rte_eth_dev *
75 rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
76 {
77         struct rte_eth_dev *eth_dev;
78         const char *name;
79
80         if (!dev)
81                 return NULL;
82
83         name = dev->device.name;
84
85         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
86                 eth_dev = rte_eth_dev_allocate(name);
87                 if (!eth_dev)
88                         return NULL;
89
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);
96                                 return NULL;
97                         }
98                 }
99         } else {
100                 eth_dev = rte_eth_dev_attach_secondary(name);
101                 if (!eth_dev)
102                         return NULL;
103         }
104
105         eth_dev->device = &dev->device;
106         rte_eth_copy_pci_info(eth_dev, dev);
107         return eth_dev;
108 }
109
110 typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);
111
112 /**
113  * @internal
114  * Wrapper for use by pci drivers in a .probe function to attach to a ethdev
115  * interface.
116  */
117 static inline int
118 rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
119         size_t private_data_size, eth_dev_pci_callback_t dev_init)
120 {
121         struct rte_eth_dev *eth_dev;
122         int ret;
123
124         eth_dev = rte_eth_dev_pci_allocate(pci_dev, private_data_size);
125         if (!eth_dev)
126                 return -ENOMEM;
127
128         RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
129         ret = dev_init(eth_dev);
130         if (ret)
131                 rte_eth_dev_release_port(eth_dev);
132         else
133                 rte_eth_dev_probing_finish(eth_dev);
134
135         return ret;
136 }
137
138 /**
139  * @internal
140  * Wrapper for use by pci drivers in a .remove function to detach a ethdev
141  * interface.
142  */
143 static inline int
144 rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
145         eth_dev_pci_callback_t dev_uninit)
146 {
147         struct rte_eth_dev *eth_dev;
148         int ret;
149
150         eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
151         if (!eth_dev)
152                 return 0;
153
154         if (dev_uninit) {
155                 ret = dev_uninit(eth_dev);
156                 if (ret)
157                         return ret;
158         }
159
160         rte_eth_dev_release_port(eth_dev);
161         return 0;
162 }
163
164 #endif /* _RTE_ETHDEV_PCI_H_ */