summaryrefslogtreecommitdiffstats
path: root/src/vlib/pci/pci.h
blob: 072988a356177c3c96da3888c0057ccbe10036fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * pci.h: PCI definitions.
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_vlib_pci_h
#define included_vlib_pci_h

#include <vlib/vlib.h>
#include <vlib/pci/pci_config.h>

/* *INDENT-OFF* */
typedef CLIB_PACKED (union
{
  struct
    {
      u16 domain;
      u8 bus;
      u8 slot: 5;
      u8 function:3;
    };
  u32 as_u32;
}) vlib_pci_addr_t;
/* *INDENT-ON* */

typedef struct vlib_pci_device_info
{
  /* addr */
  vlib_pci_addr_t addr;

  /* Numa Node */
  int numa_node;

  /* Device data */
  u16 device_class;
  u16 vendor_id;
  u16 device_id;

  /* Vital Product Data */
  u8 *product_name;
  u8 *vpd_r;
  u8 *vpd_w;

  /* Driver name */
  u8 *driver_name;

  /* First 64 bytes of configuration space. */
  union
  {
    pci_config_type0_regs_t config0;
    pci_config_type1_regs_t config1;
    u8 config_data[256];
  };

  /* IOMMU Group */
  int iommu_group;

} vlib_pci_device_info_t;

typedef u32 vlib_pci_dev_handle_t;

vlib_pci_device_info_t *vlib_pci_get_device_info (vlib_pci_addr_t * addr,
						  clib_error_t ** error);
vlib_pci_addr_t *vlib_pci_get_all_dev_addrs ();
vlib_pci_addr_t *vlib_pci_get_addr (vlib_pci_dev_handle_t h);
uword vlib_pci_get_private_data (vlib_pci_dev_handle_t h);
void vlib_pci_set_private_data (vlib_pci_dev_handle_t h, uword private_data);

static inline void
vlib_pci_free_device_info (vlib_pci_device_info_t * di)
{
  if (!di)
    return;
  vec_free (di->product_name);
  vec_free (di->vpd_r);
  vec_free (di->vpd_w);
  vec_free (di->driver_name);
  clib_mem_free (di);
}

typedef struct
{
  u16 vendor_id, device_id;
} pci_device_id_t;

typedef void (pci_intx_handler_function_t) (vlib_pci_dev_handle_t handle);
typedef void (pci_msix_handler_function_t) (vlib_pci_dev_handle_t handle,
					    u16 line);

typedef struct _pci_device_registration
{
  /* Driver init function. */
  clib_error_t *(*init_function) (vlib_main_t * vm,
				  vlib_pci_dev_handle_t handle);

  /* Interrupt handler */
  pci_intx_handler_function_t *interrupt_handler;

  /* List of registrations */
  struct _pci_device_registration *next_registration;

  /* Vendor/device ids supported by this driver. */
  pci_device_id_t supported_devices[];
} pci_device_registration_t;

/* Pool of PCI devices. */
typedef struct
{
  vlib_main_t *vlib_main;
  pci_device_registration_t *pci_device_registrations;
} vlib_pci_main_t;

extern vlib_pci_main_t pci_main;

#define PCI_REGISTER_DEVICE(x,...)                              \
    __VA_ARGS__ pci_device_registration_t x;                    \
static void __vlib_add_pci_device_registration_##x (void)       \
    __attribute__((__constructor__)) ;                          \
static void __vlib_add_pci_device_registration_##x (void)       \
{                                                               \
    vlib_pci_main_t * pm = &pci_main;                           \
    x.next_registration = pm->pci_device_registrations;         \
    pm->pci_device_registrations = &x;                          \
}                                                               \
__VA_ARGS__ pci_device_registration_t x

clib_error_t *vlib_pci_bind_to_uio (vlib_pci_addr_t * addr,
				    char *uio_driver_name);

/* Configuration space read/write. */
clib_error_t *vlib_pci_read_write_config (vlib_pci_dev_handle_t handle,
					  vlib_read_or_write_t read_or_write,
					  uword address,
					  void *data, u32 n_bytes);

#define _(t)								\
static inline clib_error_t *						\
vlib_pci_read_config_##t (vlib_pci_dev_handle_t h,			\
			  uword address, t * data)			\
{									\
  return vlib_pci_read_write_config (h, VLIB_READ,address, data,	\
				     sizeof (data[0]));			\
}

_(u32);
_(u16);
_(u8);

#undef _

#define _(t)								\
static inline clib_error_t *						\
vlib_pci_write_config_##t (vlib_pci_dev_handle_t h, uword address,	\
			   t * data)					\
{									\
  return vlib_pci_read_write_config (h, VLIB_WRITE,			\
				   address, data, sizeof (data[0]));	\
}

_(u32);
_(u16);
_(u8);

#undef _

static inline clib_error_t *
vlib_pci_intr_enable (vlib_pci_dev_handle_t h)
{
  u16 command;
  clib_error_t *err;

  err = vlib_pci_read_config_u16 (h, 4, &command);

  if (err)
    return err;

  command &= ~PCI_COMMAND_INTX_DISABLE;

  return vlib_pci_write_config_u16 (h, 4, &command);
}

static inline clib_error_t *
vlib_pci_intr_disable (vlib_pci_dev_handle_t h)
{
  u16 command;
  clib_error_t *err;

  err = vlib_pci_read_config_u16 (h, 4, &command);

  if (err)
    return err;

  command |= PCI_COMMAND_INTX_DISABLE;

  return vlib_pci_write_config_u16 (h, 4, &command);
}

static inline clib_error_t *
vlib_pci_bus_master_enable (vlib_pci_dev_handle_t h)
{
  clib_error_t *err;
  u16 command;

  /* Set bus master enable (BME) */
  err = vlib_pci_read_config_u16 (h, 4, &command);

  if (err)
    return err;

  if (command & PCI_COMMAND_BUS_MASTER)
    return 0;

  command |= PCI_COMMAND_BUS_MASTER;

  return vlib_pci_write_config_u16 (h, 4, &command);
}

clib_error_t *vlib_pci_map_region (vlib_pci_dev_handle_t h, u32 resource,
				   void **result);

clib_error_t *vlib_pci_map_region_fixed (vlib_pci_dev_handle_t h,
					 u32 resource, u8 * addr,
					 void **result);

clib_error_t *vlib_pci_register_msix_handler (vlib_pci_dev_handle_t h,
					      u32 start, u32 count,
					      pci_msix_handler_function_t *
					      msix_handler);
clib_error_t *vlib_pci_enable_msix_irq (vlib_pci_dev_handle_t h, u16 start,
					u16 count);
clib_error_t *vlib_pci_disable_msix_irq (vlib_pci_dev_handle_t h, u16 start,
					 u16 count);

unformat_function_t unformat_vlib_pci_addr;
format_function_t format_vlib_pci_addr;
format_function_t format_vlib_pci_link_speed;
format_function_t format_vlib_pci_vpd;

#endif /* included_vlib_pci_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */