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Vector Packet Processing
pci.c
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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 
56 vlib_get_pci_device (vlib_pci_addr_t * addr)
57 {
59  uword *p;
60  p = hash_get (pm->pci_dev_index_by_pci_addr, addr->as_u32);
61 
62  if (p == 0)
63  return 0;
64 
65  return vec_elt_at_index (pm->pci_devs, p[0]);
66 }
67 
68 static clib_error_t *
70  unformat_input_t * input, vlib_cli_command_t * cmd)
71 {
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  /* *INDENT-OFF* */
91  pool_foreach (d, pm->pci_devs, ({
92 
93  if (d->device_class != PCI_CLASS_NETWORK_ETHERNET && !show_all)
94  continue;
95 
96  vec_reset_length (s);
97 
98  if (d->numa_node >= 0)
99  s = format (s, " %d", d->numa_node);
100 
101  vlib_cli_output (vm, "%-13U%-5v%04x:%04x %-13U%-16s%-32v%U",
102  format_vlib_pci_addr, &d->bus_address, s,
103  d->vendor_id, d->device_id,
104  format_vlib_pci_link_speed, d,
105  d->driver_name ? (char *) d->driver_name : "",
106  d->product_name,
107  format_vlib_pci_vpd, d->vpd_r, 0);
108  }));
109 /* *INDENT-ON* */
110 
111  vec_free (s);
112  return 0;
113 }
114 
115 uword
116 unformat_vlib_pci_addr (unformat_input_t * input, va_list * args)
117 {
118  vlib_pci_addr_t *addr = va_arg (*args, vlib_pci_addr_t *);
119  u32 x[4];
120 
121  if (!unformat (input, "%x:%x:%x.%x", &x[0], &x[1], &x[2], &x[3]))
122  return 0;
123 
124  addr->domain = x[0];
125  addr->bus = x[1];
126  addr->slot = x[2];
127  addr->function = x[3];
128 
129  return 1;
130 }
131 
132 u8 *
133 format_vlib_pci_addr (u8 * s, va_list * va)
134 {
135  vlib_pci_addr_t *addr = va_arg (*va, vlib_pci_addr_t *);
136  return format (s, "%04x:%02x:%02x.%x", addr->domain, addr->bus,
137  addr->slot, addr->function);
138 }
139 
140 u8 *
141 format_vlib_pci_handle (u8 * s, va_list * va)
142 {
143  vlib_pci_addr_t *addr = va_arg (*va, vlib_pci_addr_t *);
144  return format (s, "%x/%x/%x", addr->bus, addr->slot, addr->function);
145 }
146 
147 u8 *
148 format_vlib_pci_link_speed (u8 * s, va_list * va)
149 {
150  vlib_pci_device_t *d = va_arg (*va, vlib_pci_device_t *);
151  pcie_config_regs_t *r =
153  int width;
154 
155  if (!r)
156  return format (s, "unknown");
157 
158  width = (r->link_status >> 4) & 0x3f;
159 
160  if ((r->link_status & 0xf) == 1)
161  return format (s, "2.5 GT/s x%u", width);
162  if ((r->link_status & 0xf) == 2)
163  return format (s, "5.0 GT/s x%u", width);
164  if ((r->link_status & 0xf) == 3)
165  return format (s, "8.0 GT/s x%u", width);
166  return format (s, "unknown");
167 }
168 
169 u8 *
170 format_vlib_pci_vpd (u8 * s, va_list * args)
171 {
172  u8 *data = va_arg (*args, u8 *);
173  u8 *id = va_arg (*args, u8 *);
174  uword indent = format_get_indent (s);
175  char *string_types[] = { "PN", "EC", "SN", "MN", 0 };
176  uword p = 0;
177  int first_line = 1;
178 
179  if (vec_len (data) < 3)
180  return s;
181 
182  while (p + 3 < vec_len (data))
183  {
184 
185  if (data[p] == 0 && data[p + 1] == 0)
186  return s;
187 
188  if (p + data[p + 2] > vec_len (data))
189  return s;
190 
191  if (id == 0)
192  {
193  int is_string = 0;
194  char **c = string_types;
195 
196  while (c[0])
197  {
198  if (*(u16 *) & data[p] == *(u16 *) c[0])
199  is_string = 1;
200  c++;
201  }
202 
203  if (data[p + 2])
204  {
205  if (!first_line)
206  s = format (s, "\n%U", format_white_space, indent);
207  else
208  {
209  first_line = 0;
210  s = format (s, " ");
211  }
212 
213  s = format (s, "%c%c: ", data[p], data[p + 1]);
214  if (is_string)
215  vec_add (s, data + p + 3, data[p + 2]);
216  else
217  {
218  int i;
219  const int max_bytes = 8;
220  s = format (s, "0x");
221  for (i = 0; i < clib_min (data[p + 2], max_bytes); i++)
222  s = format (s, " %02x", data[p + 3 + i]);
223 
224  if (data[p + 2] > max_bytes)
225  s = format (s, " ...");
226  }
227  }
228  }
229  else if (*(u16 *) & data[p] == *(u16 *) id)
230  {
231  vec_add (s, data + p + 3, data[p + 2]);
232  return s;
233  }
234 
235  p += 3 + data[p + 2];
236  }
237 
238  return s;
239 }
240 
241 
242 /* *INDENT-OFF* */
243 VLIB_CLI_COMMAND (show_pci_command, static) = {
244  .path = "show pci",
245  .short_help = "show pci [all]",
246  .function = show_pci_fn,
247 };
248 /* *INDENT-ON* */
249 
250 clib_error_t *
252 {
253  return 0;
254 }
255 
257 
258 /*
259  * fd.io coding-style-patch-verification: ON
260  *
261  * Local Variables:
262  * eval: (c-set-style "gnu")
263  * End:
264  */
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:343
#define clib_min(x, y)
Definition: clib.h:332
clib_error_t * pci_bus_init(vlib_main_t *vm)
Definition: pci.c:251
static void * pci_config_find_capability(pci_config_type0_regs_t *t, int cap_type)
Definition: pci_config.h:415
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
u8 * format_vlib_pci_link_speed(u8 *s, va_list *va)
Definition: pci.c:148
#define vec_add(V, E, N)
Add N elements to end of vector V (no header, unspecified alignment)
Definition: vec.h:599
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:376
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
static uword format_get_indent(u8 *s)
Definition: format.h:72
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:113
uword * pci_dev_index_by_pci_addr
Definition: pci.h:118
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
#define clib_error_return(e, args...)
Definition: error.h:111
#define hash_get(h, key)
Definition: hash.h:248
vlib_pci_device_t * pci_devs
Definition: pci.h:116
struct _unformat_input_t unformat_input_t
static clib_error_t * show_pci_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: pci.c:69
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
svmdb_client_t * c
vlib_main_t * vm
Definition: buffer.c:276
uword unformat_vlib_pci_addr(unformat_input_t *input, va_list *args)
Definition: pci.c:116
vlib_pci_main_t pci_main
Definition: pci.c:53
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:340
u8 * format_vlib_pci_vpd(u8 *s, va_list *args)
Definition: pci.c:170
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
pci_config_type0_regs_t config0
Definition: pci.h:63
unsigned int u32
Definition: types.h:88
u8 * format_vlib_pci_addr(u8 *s, va_list *va)
Definition: pci.c:133
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
u8 * format_vlib_pci_handle(u8 *s, va_list *va)
Definition: pci.c:141
vhost_vring_addr_t addr
Definition: vhost-user.h:84
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:577
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:971
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
vlib_pci_device_t * vlib_get_pci_device(vlib_pci_addr_t *addr)
Definition: pci.c:56