2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * pci.h: PCI definitions.
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #ifndef included_vlib_pci_h
41 #define included_vlib_pci_h
43 #include <vlib/vlib.h>
44 #include <vlib/pci/pci_config.h>
46 typedef CLIB_PACKED (union {
56 typedef struct vlib_pci_device {
57 /* Operating system handle for this device. */
60 vlib_pci_addr_t bus_address;
62 /* First 64 bytes of configuration space. */
64 pci_config_type0_regs_t config0;
65 pci_config_type1_regs_t config1;
69 /* Interrupt handler */
70 void (* interrupt_handler) (struct vlib_pci_device * dev);
78 /* Vital Product Data */
89 u16 vendor_id, device_id;
92 typedef struct _pci_device_registration {
93 /* Driver init function. */
94 clib_error_t * (* init_function) (vlib_main_t * vm, vlib_pci_device_t * dev);
96 /* Interrupt handler */
97 void (* interrupt_handler) (vlib_pci_device_t * dev);
99 /* List of registrations */
100 struct _pci_device_registration * next_registration;
102 /* Vendor/device ids supported by this driver. */
103 pci_device_id_t supported_devices[];
104 } pci_device_registration_t;
106 /* Pool of PCI devices. */
108 vlib_main_t * vlib_main;
109 vlib_pci_device_t * pci_devs;
110 pci_device_registration_t * pci_device_registrations;
111 uword * pci_dev_index_by_pci_addr;
114 extern vlib_pci_main_t pci_main;
116 #define PCI_REGISTER_DEVICE(x,...) \
117 __VA_ARGS__ pci_device_registration_t x; \
118 static void __vlib_add_pci_device_registration_##x (void) \
119 __attribute__((__constructor__)) ; \
120 static void __vlib_add_pci_device_registration_##x (void) \
122 vlib_pci_main_t * pm = &pci_main; \
123 x.next_registration = pm->pci_device_registrations; \
124 pm->pci_device_registrations = &x; \
126 __VA_ARGS__ pci_device_registration_t x
129 vlib_pci_bind_to_uio (vlib_pci_device_t * d, char * uio_driver_name);
131 /* Configuration space read/write. */
133 vlib_pci_read_write_config (vlib_pci_device_t * dev,
134 vlib_read_or_write_t read_or_write,
140 static inline clib_error_t * \
141 vlib_pci_read_config_##t (vlib_pci_device_t * dev, \
142 uword address, t * data) \
144 return vlib_pci_read_write_config (dev, VLIB_READ,address, data, \
155 static inline clib_error_t * \
156 vlib_pci_write_config_##t (vlib_pci_device_t * dev, uword address, \
159 return vlib_pci_read_write_config (dev, VLIB_WRITE, \
160 address, data, sizeof (data[0])); \
169 static inline clib_error_t *
170 vlib_pci_intr_enable(vlib_pci_device_t * dev)
175 err = vlib_pci_read_config_u16(dev, 4, &command);
180 command &= ~PCI_COMMAND_INTX_DISABLE;
182 return vlib_pci_write_config_u16(dev, 4, &command);
185 static inline clib_error_t *
186 vlib_pci_intr_disable(vlib_pci_device_t * dev)
191 err = vlib_pci_read_config_u16(dev, 4, &command);
196 command |= PCI_COMMAND_INTX_DISABLE;
198 return vlib_pci_write_config_u16(dev, 4, &command);
201 static inline clib_error_t *
202 vlib_pci_bus_master_enable(vlib_pci_device_t * dev)
207 /* Set bus master enable (BME) */
208 err = vlib_pci_read_config_u16(dev, 4, &command);
213 if (!(command & PCI_COMMAND_BUS_MASTER))
216 command |= PCI_COMMAND_BUS_MASTER;
218 return vlib_pci_write_config_u16(dev, 4, &command);
222 vlib_pci_map_resource (vlib_pci_device_t * dev, u32 resource, void ** result);
225 vlib_pci_map_resource_fixed (vlib_pci_device_t * dev, u32 resource, u8 * addr,
230 vlib_pci_free_device (vlib_pci_device_t * dev);
232 unformat_function_t unformat_vlib_pci_addr;
233 format_function_t format_vlib_pci_addr;
234 format_function_t format_vlib_pci_handle;
235 format_function_t format_vlib_pci_link_speed;
237 #endif /* included_vlib_pci_h */