FD.io VPP  v19.04.4-rc0-5-ge88582fac
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 <vppinfra/linux/sysfs.h>
41 
42 #include <vlib/vlib.h>
43 #include <vlib/pci/pci.h>
44 #include <vlib/unix/unix.h>
45 #include <vlib/linux/vfio.h>
46 
47 #include <sys/types.h>
48 #include <sys/stat.h>
49 #include <fcntl.h>
50 #include <dirent.h>
51 #include <sys/ioctl.h>
52 #include <net/if.h>
53 #include <linux/ethtool.h>
54 #include <linux/sockios.h>
55 #include <linux/vfio.h>
56 #include <sys/eventfd.h>
57 
58 static const char *sysfs_pci_dev_path = "/sys/bus/pci/devices";
59 static const char *sysfs_pci_drv_path = "/sys/bus/pci/drivers";
60 static char *sysfs_mod_vfio_noiommu =
61  "/sys/module/vfio/parameters/enable_unsafe_noiommu_mode";
62 
63 #define pci_log_debug(vm, dev, f, ...) \
64  vlib_log(VLIB_LOG_LEVEL_DEBUG, pci_main.log_default, "%U: " f, \
65  format_vlib_pci_addr, vlib_pci_get_addr(vm, dev->handle), ## __VA_ARGS__)
66 #define pci_log_err(vm, dev, f, ...) \
67  vlib_log(VLIB_LOG_LEVEL_ERR, pci_main.log_default, "%U: " f, \
68  format_vlib_pci_addr, vlib_pci_get_addr(vm, dev->handle), ## __VA_ARGS__)
69 
70 typedef struct
71 {
72  int fd;
73  void *addr;
74  size_t size;
76 
77 typedef struct
78 {
79  int fd;
81  union
82  {
85  };
87 
88 typedef enum
89 {
94 
95 typedef struct
96 {
99  vlib_pci_addr_t addr;
101 
102  /* Resource file descriptors. */
104 
105  /* File descriptor for config space read/write. */
108 
109  /* Device File descriptor */
110  int fd;
111 
112  /* read/write file descriptor for io bar */
113  int io_fd;
115 
116  /* Minor device for uio device. */
118 
119  /* Interrupt handlers */
122 
123  /* private data */
125 
127 
129 
130 /* Pool of PCI devices. */
131 typedef struct
132 {
135 
137 
139 
140 static linux_pci_device_t *
142 {
144  return pool_elt_at_index (lpm->linux_pci_devices, h);
145 }
146 
147 uword
149 {
151  return d->private_data;
152 }
153 
154 void
156  uword private_data)
157 {
159  d->private_data = private_data;
160 }
161 
162 vlib_pci_addr_t *
164 {
166  return &d->addr;
167 }
168 
169 u32
171 {
173  return d->numa_node;
174 }
175 
176 u32
178 {
180 
182  {
183  struct vfio_irq_info ii = { 0 };
184 
185  ii.argsz = sizeof (struct vfio_irq_info);
186  ii.index = VFIO_PCI_MSIX_IRQ_INDEX;
187  if (ioctl (d->fd, VFIO_DEVICE_GET_IRQ_INFO, &ii) < 0)
188  return 0;
189  return ii.count;
190  }
191  return 0;
192 }
193 
194 /* Call to allocate/initialize the pci subsystem.
195  This is not an init function so that users can explicitly enable
196  pci only when it's needed. */
198 
200 
202 vlib_pci_get_device_info (vlib_main_t * vm, vlib_pci_addr_t * addr,
203  clib_error_t ** error)
204 {
206  clib_error_t *err;
208  u8 *f = 0;
209  u32 tmp;
210  int fd;
211 
212  di = clib_mem_alloc (sizeof (vlib_pci_device_info_t));
213  clib_memset (di, 0, sizeof (vlib_pci_device_info_t));
214  di->addr.as_u32 = addr->as_u32;
215 
216  u8 *dev_dir_name = format (0, "%s/%U", sysfs_pci_dev_path,
217  format_vlib_pci_addr, addr);
218 
219  f = format (0, "%v/config%c", dev_dir_name, 0);
220  fd = open ((char *) f, O_RDWR);
221 
222  /* Try read-only access if write fails. */
223  if (fd < 0)
224  fd = open ((char *) f, O_RDONLY);
225 
226  if (fd < 0)
227  {
228  err = clib_error_return_unix (0, "open `%s'", f);
229  goto error;
230  }
231 
232  /* You can only read more that 64 bytes of config space as root; so we try to
233  read the full space but fall back to just the first 64 bytes. */
234  if (read (fd, &di->config_data, sizeof (di->config_data)) <
235  sizeof (di->config0))
236  {
237  err = clib_error_return_unix (0, "read `%s'", f);
238  close (fd);
239  goto error;
240  }
241 
242  {
243  static pci_config_header_t all_ones;
244  if (all_ones.vendor_id == 0)
245  clib_memset (&all_ones, ~0, sizeof (all_ones));
246 
247  if (!memcmp (&di->config0.header, &all_ones, sizeof (all_ones)))
248  {
249  err = clib_error_return (0, "invalid PCI config for `%s'", f);
250  close (fd);
251  goto error;
252  }
253  }
254 
255  if (di->config0.header.header_type == 0)
257  else
259 
260  di->numa_node = -1;
261  vec_reset_length (f);
262  f = format (f, "%v/numa_node%c", dev_dir_name, 0);
263  err = clib_sysfs_read ((char *) f, "%u", &di->numa_node);
264  if (err)
265  {
266  di->numa_node = -1;
267  clib_error_free (err);
268  }
269 
270  vec_reset_length (f);
271  f = format (f, "%v/class%c", dev_dir_name, 0);
272  err = clib_sysfs_read ((char *) f, "0x%x", &tmp);
273  if (err)
274  goto error;
275  di->device_class = tmp >> 8;
276 
277  vec_reset_length (f);
278  f = format (f, "%v/vendor%c", dev_dir_name, 0);
279  err = clib_sysfs_read ((char *) f, "0x%x", &tmp);
280  if (err)
281  goto error;
282  di->vendor_id = tmp;
283 
284  vec_reset_length (f);
285  f = format (f, "%v/device%c", dev_dir_name, 0);
286  err = clib_sysfs_read ((char *) f, "0x%x", &tmp);
287  if (err)
288  goto error;
289  di->device_id = tmp;
290 
291  vec_reset_length (f);
292  f = format (f, "%v/driver%c", dev_dir_name, 0);
293  di->driver_name = clib_sysfs_link_to_name ((char *) f);
294 
295  di->iommu_group = -1;
296  if (lvm->container_fd != -1)
297  {
298  u8 *tmpstr;
299  vec_reset_length (f);
300  f = format (f, "%v/iommu_group%c", dev_dir_name, 0);
301  tmpstr = clib_sysfs_link_to_name ((char *) f);
302  if (tmpstr)
303  {
304  di->iommu_group = atoi ((char *) tmpstr);
305  vec_free (tmpstr);
306  }
307  vec_reset_length (f);
308  f = format (f, "%v/iommu_group/name%c", dev_dir_name, 0);
309  err = clib_sysfs_read ((char *) f, "%s", &tmpstr);
310  if (err == 0)
311  {
312  if (strncmp ((char *) tmpstr, "vfio-noiommu", 12) == 0)
314  vec_free (tmpstr);
315  }
316  else
317  clib_error_free (err);
318  }
319 
320  close (fd);
321 
322  vec_reset_length (f);
323  f = format (f, "%v/vpd%c", dev_dir_name, 0);
324  fd = open ((char *) f, O_RDONLY);
325  if (fd >= 0)
326  {
327  while (1)
328  {
329  u8 tag[3];
330  u8 *data = 0;
331  uword len;
332 
333  if (read (fd, &tag, 3) != 3)
334  break;
335 
336  if (tag[0] != 0x82 && tag[0] != 0x90 && tag[0] != 0x91)
337  break;
338 
339  len = (tag[2] << 8) | tag[1];
340  vec_validate (data, len);
341 
342  if (read (fd, data, len) != len)
343  {
344  vec_free (data);
345  break;
346  }
347  if (tag[0] == 0x82)
348  di->product_name = data;
349  else if (tag[0] == 0x90)
350  di->vpd_r = data;
351  else if (tag[0] == 0x91)
352  di->vpd_w = data;
353 
354  data = 0;
355  }
356  close (fd);
357  }
358 
359  goto done;
360 
361 error:
363  di = 0;
364 
365 done:
366  vec_free (f);
367  vec_free (dev_dir_name);
368  if (error)
369  *error = err;
370  else
371  clib_error_free (err);
372  return di;
373 }
374 
375 static int
376 directory_exists (char *path)
377 {
378  struct stat s = { 0 };
379  if (stat (path, &s) == -1)
380  return 0;
381 
382  return S_ISDIR (s.st_mode);
383 }
384 
385 clib_error_t *
386 vlib_pci_bind_to_uio (vlib_main_t * vm, vlib_pci_addr_t * addr,
387  char *uio_drv_name)
388 {
389  clib_error_t *error = 0;
390  u8 *s = 0, *driver_name = 0;
391  DIR *dir = 0;
392  struct dirent *e;
394  int fd, clear_driver_override = 0;
395  u8 *dev_dir_name = format (0, "%s/%U", sysfs_pci_dev_path,
396  format_vlib_pci_addr, addr);
397 
398  di = vlib_pci_get_device_info (vm, addr, &error);
399 
400  if (error)
401  return error;
402 
403  if (strncmp ("auto", uio_drv_name, 5) == 0)
404  {
405  int vfio_pci_loaded = 0;
406 
407  if (directory_exists ("/sys/module/vfio_pci"))
408  vfio_pci_loaded = 1;
409 
410  if (di->iommu_group != -1)
411  {
412  /* device is bound to IOMMU group */
413  if (!vfio_pci_loaded)
414  {
415  error = clib_error_return (0, "Skipping PCI device %U: device "
416  "is bound to IOMMU group and "
417  "vfio-pci driver is not loaded",
418  format_vlib_pci_addr, addr);
419  goto done;
420  }
421  else
422  uio_drv_name = "vfio-pci";
423  }
424  else
425  {
426  /* device is not bound to IOMMU group so we have multiple options */
427  if (vfio_pci_loaded &&
428  (error = clib_sysfs_write (sysfs_mod_vfio_noiommu, "Y")) == 0)
429  uio_drv_name = "vfio-pci";
430  else if (directory_exists ("/sys/module/uio_pci_generic"))
431  uio_drv_name = "uio_pci_generic";
432  else if (directory_exists ("/sys/module/igb_uio"))
433  uio_drv_name = "igb_uio";
434  else
435  {
436  clib_error_free (error);
437  error = clib_error_return (0, "Skipping PCI device %U: missing "
438  "kernel VFIO or UIO driver",
439  format_vlib_pci_addr, addr);
440  goto done;
441  }
442  clib_error_free (error);
443  }
444  }
445 
446  s = format (s, "%v/driver%c", dev_dir_name, 0);
447  driver_name = clib_sysfs_link_to_name ((char *) s);
448  vec_reset_length (s);
449 
450  if (driver_name &&
451  ((strcmp ("vfio-pci", (char *) driver_name) == 0) ||
452  (strcmp ("uio_pci_generic", (char *) driver_name) == 0) ||
453  (strcmp ("igb_uio", (char *) driver_name) == 0)))
454  goto done;
455 
456  /* walk trough all linux interfaces and if interface belonging to
457  this device is founf check if interface is admin up */
458  dir = opendir ("/sys/class/net");
459  s = format (s, "%U%c", format_vlib_pci_addr, addr, 0);
460 
461  if (!dir)
462  {
463  error = clib_error_return (0, "Skipping PCI device %U: failed to "
464  "read /sys/class/net",
465  format_vlib_pci_addr, addr);
466  goto done;
467  }
468 
469  fd = socket (PF_INET, SOCK_DGRAM, 0);
470  if (fd < 0)
471  {
472  error = clib_error_return_unix (0, "socket");
473  goto done;
474  }
475 
476  while ((e = readdir (dir)))
477  {
478  struct ifreq ifr;
479  struct ethtool_drvinfo drvinfo;
480 
481  if (e->d_name[0] == '.') /* skip . and .. */
482  continue;
483 
484  clib_memset (&ifr, 0, sizeof ifr);
485  clib_memset (&drvinfo, 0, sizeof drvinfo);
486  ifr.ifr_data = (char *) &drvinfo;
487  clib_strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
488 
489  drvinfo.cmd = ETHTOOL_GDRVINFO;
490  if (ioctl (fd, SIOCETHTOOL, &ifr) < 0)
491  {
492  /* Some interfaces (eg "lo") don't support this ioctl */
493  if ((errno != ENOTSUP) && (errno != ENODEV))
494  clib_unix_warning ("ioctl fetch intf %s bus info error",
495  e->d_name);
496  continue;
497  }
498 
499  if (strcmp ((char *) s, drvinfo.bus_info))
500  continue;
501 
502  clib_memset (&ifr, 0, sizeof (ifr));
503  clib_strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name) - 1);
504 
505  if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0)
506  {
507  error = clib_error_return_unix (0, "ioctl fetch intf %s flags",
508  e->d_name);
509  close (fd);
510  goto done;
511  }
512 
513  if (ifr.ifr_flags & IFF_UP)
514  {
515  error = clib_error_return (0, "Skipping PCI device %U as host "
516  "interface %s is up",
517  format_vlib_pci_addr, addr, e->d_name);
518  close (fd);
519  goto done;
520  }
521  }
522 
523  close (fd);
524  vec_reset_length (s);
525 
526  s = format (s, "%v/driver/unbind%c", dev_dir_name, 0);
527  clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, addr);
528  vec_reset_length (s);
529 
530  s = format (s, "%v/driver_override%c", dev_dir_name, 0);
531  if (access ((char *) s, F_OK) == 0)
532  {
533  clib_sysfs_write ((char *) s, "%s", uio_drv_name);
534  clear_driver_override = 1;
535  }
536  else
537  {
538  vec_reset_length (s);
539  s = format (s, "%s/%s/new_id%c", sysfs_pci_drv_path, uio_drv_name, 0);
540  clib_sysfs_write ((char *) s, "0x%04x 0x%04x", di->vendor_id,
541  di->device_id);
542  }
543  vec_reset_length (s);
544 
545  s = format (s, "%s/%s/bind%c", sysfs_pci_drv_path, uio_drv_name, 0);
546  clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, addr);
547  vec_reset_length (s);
548 
549  if (clear_driver_override)
550  {
551  s = format (s, "%v/driver_override%c", dev_dir_name, 0);
552  clib_sysfs_write ((char *) s, "%c", 0);
553  vec_reset_length (s);
554  }
555 
556 done:
557  closedir (dir);
558  vec_free (s);
559  vec_free (dev_dir_name);
560  vec_free (driver_name);
561  return error;
562 }
563 
564 
565 static clib_error_t *
566 scan_uio_dir (void *arg, u8 * path_name, u8 * file_name)
567 {
568  linux_pci_device_t *l = arg;
569  unformat_input_t input;
570 
571  unformat_init_string (&input, (char *) file_name, vec_len (file_name));
572 
573  if (!unformat (&input, "uio%d", &l->uio_minor))
574  abort ();
575 
576  unformat_free (&input);
577  return 0;
578 }
579 
580 static clib_error_t *
582  u32 count, u32 flags, int *efds)
583 {
584  int data_len = efds ? count * sizeof (int) : 0;
585  u8 buf[sizeof (struct vfio_irq_set) + data_len];
586  struct vfio_irq_info ii = { 0 };
587  struct vfio_irq_set *irq_set = (struct vfio_irq_set *) buf;
588 
589 
590  ii.argsz = sizeof (struct vfio_irq_info);
591  ii.index = index;
592 
593  if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &ii) < 0)
594  return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_IRQ_INFO) "
595  "'%U'", format_vlib_pci_addr, &p->addr);
596 
597  pci_log_debug (vm, p, "%s index:%u count:%u flags: %s%s%s%s(0x%x)",
598  __func__, ii.index, ii.count,
599  ii.flags & VFIO_IRQ_INFO_EVENTFD ? "eventfd " : "",
600  ii.flags & VFIO_IRQ_INFO_MASKABLE ? "maskable " : "",
601  ii.flags & VFIO_IRQ_INFO_AUTOMASKED ? "automasked " : "",
602  ii.flags & VFIO_IRQ_INFO_NORESIZE ? "noresize " : "",
603  ii.flags);
604 
605  if (ii.count < start + count)
606  return clib_error_return_unix (0, "vfio_set_irq: unexistng interrupt on "
607  "'%U'", format_vlib_pci_addr, &p->addr);
608 
609 
610  if (efds)
611  {
612  flags |= VFIO_IRQ_SET_DATA_EVENTFD;
613  clib_memcpy_fast (&irq_set->data, efds, data_len);
614  }
615  else
616  flags |= VFIO_IRQ_SET_DATA_NONE;
617 
618  ASSERT ((flags & (VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_DATA_EVENTFD)) !=
619  (VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_DATA_EVENTFD));
620 
621  irq_set->argsz = sizeof (struct vfio_irq_set) + data_len;
622  irq_set->index = index;
623  irq_set->start = start;
624  irq_set->count = count;
625  irq_set->flags = flags;
626 
627  if (ioctl (p->fd, VFIO_DEVICE_SET_IRQS, irq_set) < 0)
628  return clib_error_return_unix (0, "%U:ioctl(VFIO_DEVICE_SET_IRQS) "
629  "[index = %u, start = %u, count = %u, "
630  "flags = 0x%x]",
632  index, start, count, flags);
633  return 0;
634 }
635 
636 static clib_error_t *
638 {
639  vlib_main_t *vm = vlib_get_main ();
640  int __attribute__ ((unused)) rv;
643  linux_pci_irq_t *irq = &p->intx_irq;
644 
645  u32 icount;
646  rv = read (uf->file_descriptor, &icount, 4);
647 
648  if (irq->intx_handler)
649  irq->intx_handler (vm, h);
650 
651  vlib_pci_intr_enable (vm, h);
652 
653  return /* no error */ 0;
654 }
655 
656 static clib_error_t *
658 {
659  return vfio_set_irqs (vm, d, VFIO_PCI_INTX_IRQ_INDEX, 0, 1,
660  VFIO_IRQ_SET_ACTION_UNMASK, 0);
661 }
662 
663 static clib_error_t *
665 {
666  u32 error_index = (u32) uf->private_data;
667 
668  return clib_error_return (0, "pci device %d: error", error_index);
669 }
670 
671 static clib_error_t *
673 {
674  vlib_main_t *vm = vlib_get_main ();
675  int __attribute__ ((unused)) rv;
677  u16 line = uf->private_data & 0xffff;
679  linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, line);
680 
681  u64 icount;
682  rv = read (uf->file_descriptor, &icount, sizeof (icount));
683 
684  if (irq->msix_handler)
685  irq->msix_handler (vm, h, line);
686 
687  return /* no error */ 0;
688 }
689 
690 static clib_error_t *
692 {
693  vlib_main_t *vm = vlib_get_main ();
694  int __attribute__ ((unused)) rv;
697  linux_pci_irq_t *irq = &p->intx_irq;
698 
699  u64 icount;
700  rv = read (uf->file_descriptor, &icount, sizeof (icount));
701 
702  if (irq->intx_handler)
703  irq->intx_handler (vm, h);
704 
706 
707  return /* no error */ 0;
708 }
709 
710 static clib_error_t *
712 {
713  u32 error_index = (u32) uf->private_data;
714 
715  return clib_error_return (0, "pci device %d: error", error_index);
716 }
717 
718 static clib_error_t *
721 {
723  clib_error_t *err = 0;
724  u8 *s = 0;
725 
726  p->fd = -1;
728 
729  s = format (s, "%s/%U/config%c", sysfs_pci_dev_path,
730  format_vlib_pci_addr, &di->addr, 0);
731 
732  p->config_fd = open ((char *) s, O_RDWR);
733  p->config_offset = 0;
734  vec_reset_length (s);
735 
736  if (p->config_fd == -1)
737  {
738  err = clib_error_return_unix (0, "open '%s'", s);
739  goto error;
740  }
741 
742  s = format (0, "%s/%U/uio", sysfs_pci_dev_path,
743  format_vlib_pci_addr, &di->addr);
744  foreach_directory_file ((char *) s, scan_uio_dir, p, /* scan_dirs */
745  1);
746  vec_reset_length (s);
747 
748  s = format (s, "/dev/uio%d%c", p->uio_minor, 0);
749  p->fd = open ((char *) s, O_RDWR);
750  if (p->fd < 0)
751  {
752  err = clib_error_return_unix (0, "open '%s'", s);
753  goto error;
754  }
755 
756  if (r && r->interrupt_handler)
757  vlib_pci_register_intx_handler (vm, p->handle, r->interrupt_handler);
758 
759  if (r && r->init_function)
760  err = r->init_function (lpm->vlib_main, p->handle);
761 
762 error:
763  vec_free (s);
764  if (err)
765  {
766  if (p->config_fd != -1)
767  close (p->config_fd);
768  if (p->fd != -1)
769  close (p->fd);
770  }
771  return err;
772 }
773 
774 clib_error_t *
776  pci_intx_handler_function_t * intx_handler)
777 {
779  clib_file_t t = { 0 };
780  linux_pci_irq_t *irq = &p->intx_irq;
781  ASSERT (irq->fd == -1);
782 
784  {
785  struct vfio_irq_info ii = { 0 };
786  ii.argsz = sizeof (struct vfio_irq_info);
787  ii.index = VFIO_PCI_INTX_IRQ_INDEX;
788  if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &ii) < 0)
789  return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_IRQ_INFO) '"
790  "%U'", format_vlib_pci_addr, &p->addr);
791  pci_log_debug (vm, p, "%s index:%u count:%u flags: %s%s%s%s(0x%x)",
792  __func__, ii.index, ii.count,
793  ii.flags & VFIO_IRQ_INFO_EVENTFD ? "eventfd " : "",
794  ii.flags & VFIO_IRQ_INFO_MASKABLE ? "maskable " : "",
795  ii.flags & VFIO_IRQ_INFO_AUTOMASKED ? "automasked " : "",
796  ii.flags & VFIO_IRQ_INFO_NORESIZE ? "noresize " : "",
797  ii.flags);
798  if (ii.count != 1)
799  return clib_error_return (0, "INTx interrupt does not exist on device"
800  "'%U'", format_vlib_pci_addr, &p->addr);
801 
802  irq->fd = eventfd (0, EFD_NONBLOCK);
803  if (irq->fd == -1)
804  return clib_error_return_unix (0, "eventfd");
805 
806  t.file_descriptor = irq->fd;
808  }
809  else if (p->type == LINUX_PCI_DEVICE_TYPE_UIO)
810  {
811  t.file_descriptor = p->fd;
813  }
814  else
815  return 0;
816 
818  t.private_data = p->handle;
819  t.description = format (0, "PCI %U INTx", format_vlib_pci_addr, &p->addr);
821  irq->intx_handler = intx_handler;
822  return 0;
823 }
824 
825 clib_error_t *
827  u32 start, u32 count,
828  pci_msix_handler_function_t * msix_handler)
829 {
830  clib_error_t *err = 0;
832  u32 i;
833 
835  return clib_error_return (0, "vfio driver is needed for MSI-X interrupt "
836  "support");
837 
838  /* *INDENT-OFF* */
839  vec_validate_init_empty (p->msix_irqs, start + count - 1, (linux_pci_irq_t)
840  { .fd = -1});
841  /* *INDENT-ON* */
842 
843  for (i = start; i < start + count; i++)
844  {
845  clib_file_t t = { 0 };
847  ASSERT (irq->fd == -1);
848 
849  irq->fd = eventfd (0, EFD_NONBLOCK);
850  if (irq->fd == -1)
851  {
852  err = clib_error_return_unix (0, "eventfd");
853  goto error;
854  }
855 
857  t.file_descriptor = irq->fd;
859  t.private_data = p->handle << 16 | i;
860  t.description = format (0, "PCI %U MSI-X #%u", format_vlib_pci_addr,
861  &p->addr, i);
863  irq->msix_handler = msix_handler;
864  }
865 
866  return 0;
867 
868 error:
869  while (i-- > start)
870  {
872  if (irq->fd != -1)
873  {
875  close (irq->fd);
876  irq->fd = -1;
877  }
878  }
879  return err;
880 }
881 
882 clib_error_t *
884  u16 start, u16 count)
885 {
887  int fds[count];
888  int i;
889 
891  return clib_error_return (0, "vfio driver is needed for MSI-X interrupt "
892  "support");
893 
894  for (i = start; i < start + count; i++)
895  {
897  fds[i] = irq->fd;
898  }
899 
900  return vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, start, count,
901  VFIO_IRQ_SET_ACTION_TRIGGER, fds);
902 }
903 
904 clib_error_t *
906  u16 start, u16 count)
907 {
909  int i, fds[count];
910 
912  return clib_error_return (0, "vfio driver is needed for MSI-X interrupt "
913  "support");
914 
915  for (i = start; i < start + count; i++)
916  fds[i] = -1;
917 
918  return vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, start, count,
919  VFIO_IRQ_SET_ACTION_TRIGGER, fds);
920 }
921 
922 static clib_error_t *
925 {
927  struct vfio_device_info device_info = { 0 };
928  struct vfio_region_info reg = { 0 };
929  clib_error_t *err = 0;
930  u8 *s = 0;
931  int is_noiommu;
932 
934 
935  if ((err = linux_vfio_group_get_device_fd (&p->addr, &p->fd, &is_noiommu)))
936  return err;
937 
938  if (is_noiommu == 0)
939  p->supports_va_dma = 1;
940 
941  device_info.argsz = sizeof (device_info);
942  if (ioctl (p->fd, VFIO_DEVICE_GET_INFO, &device_info) < 0)
943  {
944  err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) '%U'",
945  format_vlib_pci_addr, &di->addr);
946  goto error;
947  }
948 
949  reg.argsz = sizeof (struct vfio_region_info);
950  reg.index = VFIO_PCI_CONFIG_REGION_INDEX;
951  if (ioctl (p->fd, VFIO_DEVICE_GET_REGION_INFO, &reg) < 0)
952  {
953  err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) '%U'",
954  format_vlib_pci_addr, &di->addr);
955  goto error;
956  }
957 
958  pci_log_debug (vm, p, "%s region_info index:%u size:0x%lx offset:0x%lx "
959  "flags: %s%s%s(0x%x)", __func__,
960  reg.index, reg.size, reg.offset,
961  reg.flags & VFIO_REGION_INFO_FLAG_READ ? "rd " : "",
962  reg.flags & VFIO_REGION_INFO_FLAG_WRITE ? "wr " : "",
963  reg.flags & VFIO_REGION_INFO_FLAG_MMAP ? "mmap " : "",
964  reg.flags);
965 
966  p->config_offset = reg.offset;
967  p->config_fd = p->fd;
968 
969  /* reset if device supports it */
970  if (device_info.flags & VFIO_DEVICE_FLAGS_RESET)
971  if (ioctl (p->fd, VFIO_DEVICE_RESET) < 0)
972  {
973  err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_RESET) '%U'",
974  format_vlib_pci_addr, &di->addr);
975  goto error;
976  }
977 
978  if (r && r->interrupt_handler)
979  {
980  vlib_pci_register_intx_handler (vm, p->handle, r->interrupt_handler);
982  }
983 
984  if (p->supports_va_dma)
985  {
986  vlib_buffer_pool_t *bp;
987  /* *INDENT-OFF* */
989  {
990  u32 i;
991  vlib_physmem_map_t *pm;
993  for (i = 0; i < pm->n_pages; i++)
994  vfio_map_physmem_page (vm, pm->base + (i << pm->log2_page_size));
995  }
996  /* *INDENT-ON* */
997  }
998 
999  if (r && r->init_function)
1000  err = r->init_function (lpm->vlib_main, p->handle);
1001 
1002 error:
1003  vec_free (s);
1004  if (err)
1005  {
1006  if (p->fd != -1)
1007  close (p->fd);
1008  if (p->config_fd != -1 && p->config_fd != p->fd)
1009  close (p->config_fd);
1010  p->config_fd = p->fd = -1;
1011  }
1012  return err;
1013 }
1014 
1015 /* Configuration space read/write. */
1016 clib_error_t *
1018  vlib_read_or_write_t read_or_write,
1019  uword address, void *data, u32 n_bytes)
1020 {
1022  int n;
1023 
1024  if (read_or_write == VLIB_READ)
1025  n = pread (p->config_fd, data, n_bytes, p->config_offset + address);
1026  else
1027  n = pwrite (p->config_fd, data, n_bytes, p->config_offset + address);
1028 
1029  if (n != n_bytes)
1030  return clib_error_return_unix (0, "%s",
1031  read_or_write == VLIB_READ
1032  ? "read" : "write");
1033 
1034  return 0;
1035 }
1036 
1037 static clib_error_t *
1039  u64 * size, u64 * offset)
1040 {
1042  clib_error_t *error = 0;
1043  int _fd = -1;
1044  u64 _size = 0, _offset = 0;
1045 
1046  ASSERT (bar <= 5);
1047 
1048  error = 0;
1049 
1050  if (p->type == LINUX_PCI_DEVICE_TYPE_UIO)
1051  {
1052  u8 *file_name;
1053  struct stat stat_buf;
1054  file_name = format (0, "%s/%U/resource%d%c", sysfs_pci_dev_path,
1055  format_vlib_pci_addr, &p->addr, bar, 0);
1056 
1057  _fd = open ((char *) file_name, O_RDWR);
1058  if (_fd < 0)
1059  {
1060  error = clib_error_return_unix (0, "open `%s'", file_name);
1061  vec_free (file_name);
1062  return error;
1063  }
1064 
1065  if (fstat (_fd, &stat_buf) < 0)
1066  {
1067  error = clib_error_return_unix (0, "fstat `%s'", file_name);
1068  vec_free (file_name);
1069  close (_fd);
1070  return error;
1071  }
1072 
1073  vec_free (file_name);
1074  _size = stat_buf.st_size;
1075  _offset = 0;
1076  }
1077  else if (p->type == LINUX_PCI_DEVICE_TYPE_VFIO)
1078  {
1079  struct vfio_region_info reg = { 0 };
1080  reg.argsz = sizeof (struct vfio_region_info);
1081  reg.index = bar;
1082  if (ioctl (p->fd, VFIO_DEVICE_GET_REGION_INFO, &reg) < 0)
1083  return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) "
1084  "'%U'", format_vlib_pci_addr,
1085  &p->addr);
1086  _fd = p->fd;
1087  _size = reg.size;
1088  _offset = reg.offset;
1089  pci_log_debug (vm, p, "%s region_info index:%u size:0x%lx offset:0x%lx "
1090  "flags: %s%s%s(0x%x)", __func__,
1091  reg.index, reg.size, reg.offset,
1092  reg.flags & VFIO_REGION_INFO_FLAG_READ ? "rd " : "",
1093  reg.flags & VFIO_REGION_INFO_FLAG_WRITE ? "wr " : "",
1094  reg.flags & VFIO_REGION_INFO_FLAG_MMAP ? "mmap " : "",
1095  reg.flags);
1096  }
1097  else
1098  ASSERT (0);
1099 
1100  *fd = _fd;
1101  *size = _size;
1102  *offset = _offset;
1103 
1104  return error;
1105 }
1106 
1107 static clib_error_t *
1109  u32 bar, u8 * addr, void **result)
1110 {
1112  int fd = -1;
1113  clib_error_t *error;
1114  int flags = MAP_SHARED;
1115  u64 size = 0, offset = 0;
1116 
1117  pci_log_debug (vm, p, "map region %u to va %p", bar, addr);
1118 
1119  if ((error = vlib_pci_region (vm, h, bar, &fd, &size, &offset)))
1120  return error;
1121 
1122  if (p->type == LINUX_PCI_DEVICE_TYPE_UIO && addr != 0)
1123  flags |= MAP_FIXED;
1124 
1125  *result = mmap (addr, size, PROT_READ | PROT_WRITE, flags, fd, offset);
1126  if (*result == (void *) -1)
1127  {
1128  error = clib_error_return_unix (0, "mmap `BAR%u'", bar);
1129  if (p->type == LINUX_PCI_DEVICE_TYPE_UIO)
1130  close (fd);
1131  return error;
1132  }
1133 
1134  /* *INDENT-OFF* */
1136  (linux_pci_region_t) { .fd = -1});
1137  /* *INDENT-ON* */
1138  if (p->type == LINUX_PCI_DEVICE_TYPE_UIO)
1139  p->regions[bar].fd = fd;
1140  p->regions[bar].addr = *result;
1141  p->regions[bar].size = size;
1142  return 0;
1143 }
1144 
1145 clib_error_t *
1147  void **result)
1148 {
1149  return (vlib_pci_map_region_int (vm, h, resource, 0 /* addr */ , result));
1150 }
1151 
1152 clib_error_t *
1154  u32 resource, u8 * addr, void **result)
1155 {
1156  return (vlib_pci_map_region_int (vm, h, resource, addr, result));
1157 }
1158 
1159 clib_error_t *
1161 {
1163  clib_error_t *error = 0;
1164  int fd = -1;
1165  u64 size = 0, offset = 0;
1166 
1167  if ((error = vlib_pci_region (vm, h, resource, &fd, &size, &offset)))
1168  return error;
1169 
1170  p->io_fd = fd;
1171  p->io_offset = offset;
1172  return error;
1173 }
1174 
1175 clib_error_t *
1177  vlib_read_or_write_t read_or_write,
1178  uword offset, void *data, u32 length)
1179 {
1181  int n = 0;
1182 
1183  if (read_or_write == VLIB_READ)
1184  n = pread (p->io_fd, data, length, p->io_offset + offset);
1185  else
1186  n = pwrite (p->io_fd, data, length, p->io_offset + offset);
1187 
1188  if (n != length)
1189  return clib_error_return_unix (0, "%s",
1190  read_or_write == VLIB_READ
1191  ? "read" : "write");
1192  return 0;
1193 }
1194 
1195 clib_error_t *
1197 {
1199 
1200  if (!p->supports_va_dma)
1201  return 0;
1202 
1203  return vfio_map_physmem_page (vm, ptr);
1204 }
1205 
1206 int
1208 {
1210 
1211  return p->supports_va_dma != 0;
1212 }
1213 
1214 clib_error_t *
1215 vlib_pci_device_open (vlib_main_t * vm, vlib_pci_addr_t * addr,
1216  pci_device_id_t ids[], vlib_pci_dev_handle_t * handle)
1217 {
1220  linux_pci_device_t *p;
1221  clib_error_t *err = 0;
1222  pci_device_id_t *i;
1223 
1224  di = vlib_pci_get_device_info (vm, addr, &err);
1225 
1226  if (err)
1227  return err;
1228  for (i = ids; i->vendor_id != 0; i++)
1229  if (i->vendor_id == di->vendor_id && i->device_id == di->device_id)
1230  break;
1231 
1232  if (i->vendor_id == 0)
1233  return clib_error_return (0, "Wrong vendor or device id");
1234 
1235  pool_get (lpm->linux_pci_devices, p);
1236  p->handle = p - lpm->linux_pci_devices;
1237  p->addr.as_u32 = di->addr.as_u32;
1238  p->intx_irq.fd = -1;
1239  p->intx_irq.clib_file_index = -1;
1240  p->numa_node = di->numa_node;
1241  /*
1242  * pci io bar read/write fd
1243  */
1244  p->io_fd = -1;
1245 
1246  pci_log_debug (vm, p, "open vid:0x%04x did:0x%04x driver:%s iommu_group:%d",
1247  di->vendor_id, di->device_id, di->driver_name,
1248  di->iommu_group);
1249 
1250  if (strncmp ("vfio-pci", (char *) di->driver_name, 8) == 0)
1251  err = add_device_vfio (vm, p, di, 0);
1252  else if (strncmp ("uio_pci_generic", (char *) di->driver_name, 8) == 0)
1253  err = add_device_uio (vm, p, di, 0);
1254  else
1255  err = clib_error_create ("device not bound to 'vfio-pci' or "
1256  "'uio_pci_generic' kernel module");
1257  if (err)
1258  goto error;
1259 
1260  *handle = p->handle;
1261 
1262 error:
1264  if (err)
1265  {
1266  pci_log_err (vm, p, "%U", format_clib_error, err);
1267  clib_memset (p, 0, sizeof (linux_pci_device_t));
1268  pool_put (lpm->linux_pci_devices, p);
1269  }
1270 
1271  return err;
1272 }
1273 
1274 void
1276 {
1279  linux_pci_irq_t *irq;
1280  linux_pci_region_t *res;
1281  clib_error_t *err = 0;
1282 
1283  if (p->type == LINUX_PCI_DEVICE_TYPE_UIO)
1284  {
1285  irq = &p->intx_irq;
1286  if (irq->clib_file_index != -1)
1288  close (p->config_fd);
1289  if (p->io_fd != -1)
1290  close (p->io_fd);
1291  }
1292  else if (p->type == LINUX_PCI_DEVICE_TYPE_VFIO)
1293  {
1294  irq = &p->intx_irq;
1295  /* close INTx irqs */
1296  if (irq->fd != -1)
1297  {
1298  err = vfio_set_irqs (vm, p, VFIO_PCI_INTX_IRQ_INDEX, 0, 0,
1299  VFIO_IRQ_SET_ACTION_TRIGGER, 0);
1300  clib_error_free (err);
1301  if (irq->clib_file_index != -1)
1303  close (irq->fd);
1304  }
1305 
1306  /* close MSI-X irqs */
1307  if (vec_len (p->msix_irqs))
1308  {
1309  err = vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, 0, 0,
1310  VFIO_IRQ_SET_ACTION_TRIGGER, 0);
1311  clib_error_free (err);
1312  /* *INDENT-OFF* */
1313  vec_foreach (irq, p->msix_irqs)
1314  {
1315  if (irq->fd == -1)
1316  continue;
1318  close (irq->fd);
1319  }
1320  /* *INDENT-ON* */
1321  vec_free (p->msix_irqs);
1322  }
1323  }
1324 
1325  /* *INDENT-OFF* */
1326  vec_foreach (res, p->regions)
1327  {
1328  if (res->size == 0)
1329  continue;
1330  munmap (res->addr, res->size);
1331  if (res->fd != -1)
1332  close (res->fd);
1333  }
1334  /* *INDENT-ON* */
1335  vec_free (p->regions);
1336 
1337  close (p->fd);
1338  clib_memset (p, 0, sizeof (linux_pci_device_t));
1339  pool_put (lpm->linux_pci_devices, p);
1340 }
1341 
1342 void
1344 {
1345  vlib_pci_main_t *pm = &pci_main;
1348  pci_device_id_t *i;
1349  clib_error_t *err = 0;
1350  linux_pci_device_t *p;
1351 
1352  pool_get (lpm->linux_pci_devices, p);
1353  p->handle = p - lpm->linux_pci_devices;
1354  p->intx_irq.fd = -1;
1355 
1356  r = pm->pci_device_registrations;
1357 
1358  while (r)
1359  {
1360  for (i = r->supported_devices; i->vendor_id != 0; i++)
1361  if (i->vendor_id == di->vendor_id && i->device_id == di->device_id)
1362  {
1363  if (di->iommu_group != -1)
1364  err = add_device_vfio (vm, p, di, r);
1365  else
1366  err = add_device_uio (vm, p, di, r);
1367 
1368  if (err)
1369  clib_error_report (err);
1370  else
1371  return;
1372  }
1373  r = r->next_registration;
1374  }
1375 
1376  /* No driver, close the PCI config-space FD */
1377  clib_memset (p, 0, sizeof (linux_pci_device_t));
1378  pool_put (lpm->linux_pci_devices, p);
1379 }
1380 
1381 static clib_error_t *
1382 scan_pci_addr (void *arg, u8 * dev_dir_name, u8 * ignored)
1383 {
1384  vlib_pci_addr_t addr, **addrv = arg;
1385  unformat_input_t input;
1386  clib_error_t *err = 0;
1387 
1388  unformat_init_string (&input, (char *) dev_dir_name,
1389  vec_len (dev_dir_name));
1390 
1391  if (!unformat (&input, "/sys/bus/pci/devices/%U",
1392  unformat_vlib_pci_addr, &addr))
1393  err = clib_error_return (0, "unformat error `%v`", dev_dir_name);
1394 
1395  unformat_free (&input);
1396 
1397  if (err)
1398  return err;
1399 
1400  vec_add1 (*addrv, addr);
1401  return 0;
1402 }
1403 
1404 static int
1405 pci_addr_cmp (void *v1, void *v2)
1406 {
1407  vlib_pci_addr_t *a1 = v1;
1408  vlib_pci_addr_t *a2 = v2;
1409 
1410  if (a1->domain > a2->domain)
1411  return 1;
1412  if (a1->domain < a2->domain)
1413  return -1;
1414  if (a1->bus > a2->bus)
1415  return 1;
1416  if (a1->bus < a2->bus)
1417  return -1;
1418  if (a1->slot > a2->slot)
1419  return 1;
1420  if (a1->slot < a2->slot)
1421  return -1;
1422  if (a1->function > a2->function)
1423  return 1;
1424  if (a1->function < a2->function)
1425  return -1;
1426  return 0;
1427 }
1428 
1429 vlib_pci_addr_t *
1431 {
1432  vlib_pci_addr_t *addrs = 0;
1433  clib_error_t *err;
1435  &addrs, /* scan_dirs */ 0);
1436  if (err)
1437  {
1438  vec_free (addrs);
1439  return 0;
1440  }
1441 
1443 
1444  return addrs;
1445 }
1446 
1447 clib_error_t *
1449 {
1450  vlib_pci_main_t *pm = &pci_main;
1451  vlib_pci_addr_t *addr = 0, *addrs;
1452  clib_error_t *error;
1453 
1454  pm->vlib_main = vm;
1455 
1456  if ((error = vlib_call_init_function (vm, unix_input_init)))
1457  return error;
1458 
1459  ASSERT (sizeof (vlib_pci_addr_t) == sizeof (u32));
1460 
1461  addrs = vlib_pci_get_all_dev_addrs ();
1462  /* *INDENT-OFF* */
1463  vec_foreach (addr, addrs)
1464  {
1466  if ((d = vlib_pci_get_device_info (vm, addr, 0)))
1467  {
1470  }
1471  }
1472  /* *INDENT-ON* */
1473 
1474  return error;
1475 }
1476 
1478 
1479 /*
1480  * fd.io coding-style-patch-verification: ON
1481  *
1482  * Local Variables:
1483  * eval: (c-set-style "gnu")
1484  * End:
1485  */
static clib_error_t * linux_pci_vfio_unmask_intx(vlib_main_t *vm, linux_pci_device_t *d)
Definition: pci.c:657
clib_error_t * pci_bus_init(vlib_main_t *vm)
Definition: pci.c:252
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
clib_error_t * vlib_pci_map_region_fixed(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 resource, u8 *addr, void **result)
Definition: pci.c:1153
typedef address
Definition: ip_types.api:30
u8 * format_clib_error(u8 *s, va_list *va)
Definition: error.c:191
static clib_error_t * vlib_pci_intr_enable(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.h:239
u32 flags
Definition: vhost_user.h:115
static clib_error_t * unix_input_init(vlib_main_t *vm)
Definition: input.c:412
static const char * sysfs_pci_dev_path
Definition: pci.c:58
linux_pci_device_type_t type
Definition: pci.c:97
linux_pci_irq_t intx_irq
Definition: pci.c:120
unsigned long u64
Definition: types.h:89
pci_device_registration_t * pci_device_registrations
Definition: pci.h:156
void vlib_pci_device_close(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:1275
vlib_read_or_write_t
Definition: defs.h:54
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
vlib_pci_main_t pci_main
Definition: pci.c:53
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
u32 vlib_pci_get_num_msix_interrupts(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:177
u32 physmem_map_index
Definition: buffer.h:390
static int directory_exists(char *path)
Definition: pci.c:376
u32 file_descriptor
Definition: file.h:54
static clib_error_t * scan_pci_addr(void *arg, u8 *dev_dir_name, u8 *ignored)
Definition: pci.c:1382
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
static const char uio_drv_name[]
Definition: vmbus.c:39
static void vlib_pci_free_device_info(vlib_pci_device_info_t *di)
Definition: pci.h:114
int i
static int pci_addr_cmp(void *v1, void *v2)
Definition: pci.c:1405
vlib_buffer_main_t * buffer_main
Definition: main.h:129
static clib_error_t * linux_pci_uio_read_ready(clib_file_t *uf)
Definition: pci.c:637
clib_error_t * vlib_pci_enable_msix_irq(vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 start, u16 count)
Definition: pci.c:883
void() pci_msix_handler_function_t(vlib_main_t *vm, vlib_pci_dev_handle_t handle, u16 line)
Definition: pci.h:132
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
u8 data[128]
Definition: ipsec.api:248
vlib_physmem_map_t * vlib_physmem_get_map(vlib_main_t *vm, u32 index)
Definition: physmem.c:87
#define pci_log_err(vm, dev, f,...)
Definition: pci.c:66
vlib_pci_addr_t addr
Definition: pci.c:99
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
vhost_vring_addr_t addr
Definition: vhost_user.h:121
u8 supports_va_dma
Definition: pci.c:126
clib_error_t * clib_sysfs_write(char *file_name, char *fmt,...)
Definition: sysfs.c:26
static clib_error_t * linux_pci_vfio_error_ready(clib_file_t *uf)
Definition: pci.c:711
unsigned char u8
Definition: types.h:56
void * addr
Definition: pci.c:73
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
clib_file_function_t * read_function
Definition: file.h:67
clib_error_t * vlib_pci_read_write_config(vlib_main_t *vm, vlib_pci_dev_handle_t h, vlib_read_or_write_t read_or_write, uword address, void *data, u32 n_bytes)
Definition: pci.c:1017
static clib_error_t * linux_pci_vfio_intx_read_ready(clib_file_t *uf)
Definition: pci.c:691
static clib_error_t * vlib_pci_region(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 bar, int *fd, u64 *size, u64 *offset)
Definition: pci.c:1038
int fd
Definition: pci.c:79
static void pci_config_type1_little_to_host(pci_config_type1_regs_t *r)
Definition: pci_config.h:353
clib_error_t * vlib_pci_map_dma(vlib_main_t *vm, vlib_pci_dev_handle_t h, void *ptr)
Definition: pci.c:1196
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
void di(unformat_input_t *i)
Definition: unformat.c:163
static clib_error_t * linux_pci_vfio_msix_read_ready(clib_file_t *uf)
Definition: pci.c:672
#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:99
vlib_pci_addr_t * vlib_pci_get_all_dev_addrs()
Definition: pci.c:1430
clib_file_main_t file_main
Definition: main.c:63
static char * sysfs_mod_vfio_noiommu
Definition: pci.c:60
vlib_main_t * vlib_main
Definition: pci.c:133
unsigned int u32
Definition: types.h:88
linux_pci_irq_t * msix_irqs
Definition: pci.c:121
#define clib_error_create(args...)
Definition: error.h:96
clib_error_t * linux_vfio_group_get_device_fd(vlib_pci_addr_t *addr, int *fdp, int *is_noiommu)
Definition: vfio.c:177
#define vlib_call_init_function(vm, x)
Definition: init.h:260
pci_config_type1_regs_t config1
Definition: pci.h:88
vlib_pci_dev_handle_t handle
Definition: pci.c:98
void unformat_init_string(unformat_input_t *input, char *string, int string_len)
Definition: unformat.c:1023
uword private_data
Definition: pci.c:124
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 config_data[256]
Definition: pci.h:89
u8 * description
Definition: file.h:70
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
uword size
u32 clib_file_index
Definition: pci.c:80
static const char * sysfs_pci_drv_path
Definition: pci.c:59
void vlib_pci_set_private_data(vlib_main_t *vm, vlib_pci_dev_handle_t h, uword private_data)
Definition: pci.c:155
clib_error_t * vlib_pci_bind_to_uio(vlib_main_t *vm, vlib_pci_addr_t *addr, char *uio_drv_name)
Definition: pci.c:386
static clib_error_t * scan_uio_dir(void *arg, u8 *path_name, u8 *file_name)
Definition: pci.c:566
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
#define clib_error_return_unix(e, args...)
Definition: error.h:102
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
vlib_buffer_pool_t * buffer_pools
Definition: buffer.h:413
clib_error_t * vlib_pci_register_msix_handler(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 start, u32 count, pci_msix_handler_function_t *msix_handler)
Definition: pci.c:826
linux_pci_main_t linux_pci_main
Definition: pci.c:199
clib_error_t * linux_pci_init(vlib_main_t *vm)
Definition: pci.c:1448
void init_device_from_registered(vlib_main_t *vm, vlib_pci_device_info_t *di)
Definition: pci.c:1343
uword vlib_pci_get_private_data(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:148
u32 vlib_pci_dev_handle_t
Definition: pci.h:97
clib_error_t * clib_sysfs_read(char *file_name, char *fmt,...)
Definition: sysfs.c:50
u8 len
Definition: ip_types.api:49
linux_pci_device_type_t
Definition: pci.c:88
u8 * format_vlib_pci_addr(u8 *s, va_list *va)
Definition: pci.c:141
static void pci_config_type0_little_to_host(pci_config_type0_regs_t *r)
Definition: pci_config.h:279
u32 vlib_pci_get_numa_node(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:170
#define clib_strncpy(d, s, n)
Definition: string.h:995
#define VLIB_PCI_DEVICE_INFO_F_NOIOMMU
Definition: pci.h:63
vlib_main_t * vm
Definition: buffer.c:312
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u8 * driver_name
Definition: pci.h:82
#define pci_log_debug(vm, dev, f,...)
Definition: pci.c:63
clib_error_t * vlib_pci_read_write_io(vlib_main_t *vm, vlib_pci_dev_handle_t h, vlib_read_or_write_t read_or_write, uword offset, void *data, u32 length)
Definition: pci.c:1176
void() pci_intx_handler_function_t(vlib_main_t *vm, vlib_pci_dev_handle_t handle)
Definition: pci.h:130
clib_error_t * vlib_pci_disable_msix_irq(vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 start, u16 count)
Definition: pci.c:905
pci_msix_handler_function_t * msix_handler
Definition: pci.c:84
vlib_pci_addr_t * vlib_pci_get_addr(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:163
size_t size
Definition: pci.c:74
#define ASSERT(truth)
static clib_error_t * vfio_set_irqs(vlib_main_t *vm, linux_pci_device_t *p, u32 index, u32 start, u32 count, u32 flags, int *efds)
Definition: pci.c:581
static uword clib_file_add(clib_file_main_t *um, clib_file_t *template)
Definition: file.h:96
static void clib_file_del_by_index(clib_file_main_t *um, uword index)
Definition: file.h:119
static clib_error_t * linux_pci_uio_error_ready(clib_file_t *uf)
Definition: pci.c:664
pci_config_type0_regs_t config0
Definition: pci.h:87
#define clib_error_report(e)
Definition: error.h:113
clib_error_t * vfio_map_physmem_page(vlib_main_t *vm, void *addr)
Definition: vfio.c:38
size_t count
Definition: vapi.c:47
vlib_pci_addr_t addr
Definition: pci.h:66
clib_error_t * vlib_pci_register_intx_handler(vlib_main_t *vm, vlib_pci_dev_handle_t h, pci_intx_handler_function_t *intx_handler)
Definition: pci.c:775
static void * clib_mem_alloc(uword size)
Definition: mem.h:132
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
template key/value backing page structure
Definition: bihash_doc.h:44
Definition: defs.h:56
static clib_error_t * vlib_pci_map_region_int(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 bar, u8 *addr, void **result)
Definition: pci.c:1108
static clib_error_t * add_device_vfio(vlib_main_t *vm, linux_pci_device_t *p, vlib_pci_device_info_t *di, pci_device_registration_t *r)
Definition: pci.c:923
clib_error_t * foreach_directory_file(char *dir_name, clib_error_t *(*f)(void *arg, u8 *path_name, u8 *file_name), void *arg, int scan_dirs)
Definition: util.c:49
#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
#define vec_sort_with_function(vec, f)
Sort a vector using the supplied element comparison function.
Definition: vec.h:980
static void unformat_free(unformat_input_t *i)
Definition: format.h:162
#define clib_unix_warning(format, args...)
Definition: error.h:68
#define clib_error_free(e)
Definition: error.h:86
clib_error_t * vlib_pci_io_region(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 resource)
Definition: pci.c:1160
clib_error_t * vlib_pci_map_region(vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 resource, void **result)
Definition: pci.c:1146
clib_file_function_t * error_function
Definition: file.h:67
linux_pci_region_t * regions
Definition: pci.c:103
pci_intx_handler_function_t * intx_handler
Definition: pci.c:83
struct clib_bihash_value offset
template key/value backing page structure
int container_fd
Definition: vfio.h:28
u16 device_id
Definition: pci.h:127
int vlib_pci_supports_virtual_addr_dma(vlib_main_t *vm, vlib_pci_dev_handle_t h)
Definition: pci.c:1207
struct _pci_device_registration pci_device_registration_t
#define vec_foreach(var, vec)
Vector iterator.
uword private_data
Definition: file.h:64
Definition: file.h:51
static clib_error_t * add_device_uio(vlib_main_t *vm, linux_pci_device_t *p, vlib_pci_device_info_t *di, pci_device_registration_t *r)
Definition: pci.c:719
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:486
u16 device_class
Definition: pci.h:72
linux_pci_device_t * linux_pci_devices
Definition: pci.c:134
vlib_main_t * vlib_main
Definition: pci.h:155
clib_error_t * vlib_pci_device_open(vlib_main_t *vm, vlib_pci_addr_t *addr, pci_device_id_t ids[], vlib_pci_dev_handle_t *handle)
Definition: pci.c:1215
pci_config_header_t header
Definition: pci_config.h:247
u64 config_offset
Definition: pci.c:107
u8 * product_name
Definition: pci.h:77
u16 vendor_id
Definition: pci.h:127
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
u8 * clib_sysfs_link_to_name(char *link)
Definition: sysfs.c:90
linux_vfio_main_t vfio_main
Definition: vfio.c:35
static linux_pci_device_t * linux_pci_get_device(vlib_pci_dev_handle_t h)
Definition: pci.c:141