FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
pci.c
Go to the documentation of this file.
1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 /*
16  * pci.c: Linux user space PCI bus management.
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
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:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
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.
38  */
39 
40 #include <vlib/vlib.h>
41 #include <vlib/pci/pci.h>
42 #include <vlib/unix/unix.h>
43 
44 #include <sys/types.h>
45 #include <sys/stat.h>
46 #include <fcntl.h>
47 #include <dirent.h>
48 #include <sys/ioctl.h>
49 #include <net/if.h>
50 #include <linux/ethtool.h>
51 #include <linux/sockios.h>
52 
54 
55 vlib_pci_device_info_t * __attribute__ ((weak))
57  clib_error_t ** error)
58 {
59  if (error)
60  *error = clib_error_return (0, "unsupported");
61  return 0;
62 }
63 
64 vlib_pci_addr_t * __attribute__ ((weak)) vlib_pci_get_all_dev_addrs ()
65 {
66  return 0;
67 }
68 
69 static clib_error_t *
71  unformat_input_t * input, vlib_cli_command_t * cmd)
72 {
73  vlib_pci_addr_t *addr = 0, *addrs;
74  int show_all = 0;
75  u8 *s = 0;
76 
78  {
79  if (unformat (input, "all"))
80  show_all = 1;
81  else
82  return clib_error_return (0, "unknown input `%U'",
83  format_unformat_error, input);
84  }
85 
86  vlib_cli_output (vm, "%-13s%-5s%-12s%-13s%-16s%-32s%s",
87  "Address", "Sock", "VID:PID", "Link Speed", "Driver",
88  "Product Name", "Vital Product Data");
89 
90  addrs = vlib_pci_get_all_dev_addrs ();
91  /* *INDENT-OFF* */
92  vec_foreach (addr, addrs)
93  {
95  d = vlib_pci_get_device_info (vm, addr, 0);
96 
97  if (!d)
98  continue;
99 
100  if (d->device_class != PCI_CLASS_NETWORK_ETHERNET && !show_all)
101  continue;
102 
103  vec_reset_length (s);
104  if (d->numa_node >= 0)
105  s = format (s, " %d", d->numa_node);
106 
107  vlib_cli_output (vm, "%-13U%-5v%04x:%04x %-13U%-16s%-32v%U",
108  format_vlib_pci_addr, addr, s,
109  d->vendor_id, d->device_id,
111  d->driver_name ? (char *) d->driver_name : "",
112  d->product_name,
113  format_vlib_pci_vpd, d->vpd_r, (u8 *) 0);
115  }
116  /* *INDENT-ON* */
117 
118  vec_free (s);
119  vec_free (addrs);
120  return 0;
121 }
122 
123 uword
124 unformat_vlib_pci_addr (unformat_input_t * input, va_list * args)
125 {
126  vlib_pci_addr_t *addr = va_arg (*args, vlib_pci_addr_t *);
127  u32 x[4];
128 
129  if (!unformat (input, "%x:%x:%x.%x", &x[0], &x[1], &x[2], &x[3]))
130  return 0;
131 
132  addr->domain = x[0];
133  addr->bus = x[1];
134  addr->slot = x[2];
135  addr->function = x[3];
136 
137  return 1;
138 }
139 
140 u8 *
141 format_vlib_pci_addr (u8 * s, va_list * va)
142 {
143  vlib_pci_addr_t *addr = va_arg (*va, vlib_pci_addr_t *);
144  return format (s, "%04x:%02x:%02x.%x", addr->domain, addr->bus,
145  addr->slot, addr->function);
146 }
147 
148 u8 *
149 format_vlib_pci_link_speed (u8 * s, va_list * va)
150 {
151  vlib_pci_device_info_t *d = va_arg (*va, vlib_pci_device_info_t *);
152  pcie_config_regs_t *r =
154  int width;
155 
156  if (!r)
157  return format (s, "unknown");
158 
159  width = (r->link_status >> 4) & 0x3f;
160 
161  if ((r->link_status & 0xf) == 1)
162  return format (s, "2.5 GT/s x%u", width);
163  if ((r->link_status & 0xf) == 2)
164  return format (s, "5.0 GT/s x%u", width);
165  if ((r->link_status & 0xf) == 3)
166  return format (s, "8.0 GT/s x%u", width);
167  return format (s, "unknown");
168 }
169 
170 u8 *
171 format_vlib_pci_vpd (u8 * s, va_list * args)
172 {
173  u8 *data = va_arg (*args, u8 *);
174  u8 *id = va_arg (*args, u8 *);
175  u32 indent = format_get_indent (s);
176  char *string_types[] = { "PN", "EC", "SN", "MN", 0 };
177  uword p = 0;
178  int first_line = 1;
179 
180  if (vec_len (data) < 3)
181  return s;
182 
183  while (p + 3 < vec_len (data))
184  {
185 
186  if (data[p] == 0 && data[p + 1] == 0)
187  return s;
188 
189  if (p + data[p + 2] > vec_len (data))
190  return s;
191 
192  if (id == 0)
193  {
194  int is_string = 0;
195  char **c = string_types;
196 
197  while (c[0])
198  {
199  if (*(u16 *) & data[p] == *(u16 *) c[0])
200  is_string = 1;
201  c++;
202  }
203 
204  if (data[p + 2])
205  {
206  if (!first_line)
207  s = format (s, "\n%U", format_white_space, indent);
208  else
209  {
210  first_line = 0;
211  s = format (s, " ");
212  }
213 
214  s = format (s, "%c%c: ", data[p], data[p + 1]);
215  if (is_string)
216  vec_add (s, data + p + 3, data[p + 2]);
217  else
218  {
219  int i;
220  const int max_bytes = 8;
221  s = format (s, "0x");
222  for (i = 0; i < clib_min (data[p + 2], max_bytes); i++)
223  s = format (s, " %02x", data[p + 3 + i]);
224 
225  if (data[p + 2] > max_bytes)
226  s = format (s, " ...");
227  }
228  }
229  }
230  else if (*(u16 *) & data[p] == *(u16 *) id)
231  {
232  vec_add (s, data + p + 3, data[p + 2]);
233  return s;
234  }
235 
236  p += 3 + data[p + 2];
237  }
238 
239  return s;
240 }
241 
242 
243 /* *INDENT-OFF* */
244 VLIB_CLI_COMMAND (show_pci_command, static) = {
245  .path = "show pci",
246  .short_help = "show pci [all]",
247  .function = show_pci_fn,
248 };
249 /* *INDENT-ON* */
250 
251 clib_error_t *
253 {
254  vlib_pci_main_t *pm = &pci_main;
255  pm->log_default = vlib_log_register_class ("pci", 0);
256  return 0;
257 }
258 
260 
261 /*
262  * fd.io coding-style-patch-verification: ON
263  *
264  * Local Variables:
265  * eval: (c-set-style "gnu")
266  * End:
267  */
vlib_log_class_t vlib_log_register_class(char *class, char *subclass)
Definition: log.c:176
clib_error_t * pci_bus_init(vlib_main_t *vm)
Definition: pci.c:252
u8 * format_vlib_pci_link_speed(u8 *s, va_list *va)
Definition: pci.c:149
#define clib_min(x, y)
Definition: clib.h:302
static void * pci_config_find_capability(pci_config_type0_regs_t *t, int cap_type)
Definition: pci_config.h:421
vlib_pci_main_t pci_main
Definition: pci.c:53
static void vlib_pci_free_device_info(vlib_pci_device_info_t *di)
Definition: pci.h:114
int i
static u32 format_get_indent(u8 *s)
Definition: format.h:72
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u8 data[128]
Definition: ipsec.api:251
vhost_vring_addr_t addr
Definition: vhost_user.h:147
unsigned char u8
Definition: types.h:56
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
#define vec_add(V, E, N)
Add N elements to end of vector V (no header, unspecified alignment)
Definition: vec.h:598
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
#define clib_error_return(e, args...)
Definition: error.h:99
vlib_pci_addr_t * vlib_pci_get_all_dev_addrs()
Definition: pci.c:1441
unsigned int u32
Definition: types.h:88
vlib_pci_device_info_t * vlib_pci_get_device_info(vlib_main_t *vm, vlib_pci_addr_t *addr, clib_error_t **error)
Definition: pci.c:202
u8 * format_vlib_pci_vpd(u8 *s, va_list *args)
Definition: pci.c:171
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
u8 * format_vlib_pci_addr(u8 *s, va_list *va)
Definition: pci.c:141
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
svmdb_client_t * c
vlib_main_t * vm
Definition: buffer.c:323
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u8 * driver_name
Definition: pci.h:82
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:161
pci_config_type0_regs_t config0
Definition: pci.h:87
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
uword unformat_vlib_pci_addr(unformat_input_t *input, va_list *args)
Definition: pci.c:124
u64 uword
Definition: types.h:112
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define vec_foreach(var, vec)
Vector iterator.
vlib_log_class_t log_default
Definition: pci.h:158
u16 device_class
Definition: pci.h:72
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:772
static clib_error_t * show_pci_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: pci.c:70
u8 * product_name
Definition: pci.h:77
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171