Bug Summary

File:home/bhubbard/working/src/ceph/src/spdk/dpdk/lib/librte_eal/linux/eal/eal_vfio.c
Warning:line 1053, column 11
Use of memory after it is freed

Annotated Source Code

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1/* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
3 */
4
5#include <inttypes.h>
6#include <string.h>
7#include <fcntl.h>
8#include <unistd.h>
9#include <sys/ioctl.h>
10
11#include <rte_errno(per_lcore__rte_errno).h>
12#include <rte_log.h>
13#include <rte_memory.h>
14#include <rte_eal_memconfig.h>
15#include <rte_vfio.h>
16
17#include "eal_filesystem.h"
18#include "eal_vfio.h"
19#include "eal_private.h"
20
21#ifdef VFIO_PRESENT
22
23#define VFIO_MEM_EVENT_CLB_NAME"vfio_mem_event_clb" "vfio_mem_event_clb"
24
25/* hot plug/unplug of VFIO groups may cause all DMA maps to be dropped. we can
26 * recreate the mappings for DPDK segments, but we cannot do so for memory that
27 * was registered by the user themselves, so we need to store the user mappings
28 * somewhere, to recreate them later.
29 */
30#define VFIO_MAX_USER_MEM_MAPS256 256
31struct user_mem_map {
32 uint64_t addr;
33 uint64_t iova;
34 uint64_t len;
35};
36
37struct user_mem_maps {
38 rte_spinlock_recursive_t lock;
39 int n_maps;
40 struct user_mem_map maps[VFIO_MAX_USER_MEM_MAPS256];
41};
42
43struct vfio_config {
44 int vfio_enabled;
45 int vfio_container_fd;
46 int vfio_active_groups;
47 const struct vfio_iommu_type *vfio_iommu_type;
48 struct vfio_group vfio_groups[VFIO_MAX_GROUPS64];
49 struct user_mem_maps mem_maps;
50};
51
52/* per-process VFIO config */
53static struct vfio_config vfio_cfgs[VFIO_MAX_CONTAINERS64];
54static struct vfio_config *default_vfio_cfg = &vfio_cfgs[0];
55
56static int vfio_type1_dma_map(int);
57static int vfio_type1_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
58static int vfio_spapr_dma_map(int);
59static int vfio_spapr_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
60static int vfio_noiommu_dma_map(int);
61static int vfio_noiommu_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
62static int vfio_dma_mem_map(struct vfio_config *vfio_cfg, uint64_t vaddr,
63 uint64_t iova, uint64_t len, int do_map);
64
65/* IOMMU types we support */
66static const struct vfio_iommu_type iommu_types[] = {
67 /* x86 IOMMU, otherwise known as type 1 */
68 {
69 .type_id = RTE_VFIO_TYPE11,
70 .name = "Type 1",
71 .dma_map_func = &vfio_type1_dma_map,
72 .dma_user_map_func = &vfio_type1_dma_mem_map
73 },
74 /* ppc64 IOMMU, otherwise known as spapr */
75 {
76 .type_id = RTE_VFIO_SPAPR7,
77 .name = "sPAPR",
78 .dma_map_func = &vfio_spapr_dma_map,
79 .dma_user_map_func = &vfio_spapr_dma_mem_map
80 },
81 /* IOMMU-less mode */
82 {
83 .type_id = RTE_VFIO_NOIOMMU8,
84 .name = "No-IOMMU",
85 .dma_map_func = &vfio_noiommu_dma_map,
86 .dma_user_map_func = &vfio_noiommu_dma_mem_map
87 },
88};
89
90static int
91is_null_map(const struct user_mem_map *map)
92{
93 return map->addr == 0 && map->iova == 0 && map->len == 0;
94}
95
96/* we may need to merge user mem maps together in case of user mapping/unmapping
97 * chunks of memory, so we'll need a comparator function to sort segments.
98 */
99static int
100user_mem_map_cmp(const void *a, const void *b)
101{
102 const struct user_mem_map *umm_a = a;
103 const struct user_mem_map *umm_b = b;
104
105 /* move null entries to end */
106 if (is_null_map(umm_a))
107 return 1;
108 if (is_null_map(umm_b))
109 return -1;
110
111 /* sort by iova first */
112 if (umm_a->iova < umm_b->iova)
113 return -1;
114 if (umm_a->iova > umm_b->iova)
115 return 1;
116
117 if (umm_a->addr < umm_b->addr)
118 return -1;
119 if (umm_a->addr > umm_b->addr)
120 return 1;
121
122 if (umm_a->len < umm_b->len)
123 return -1;
124 if (umm_a->len > umm_b->len)
125 return 1;
126
127 return 0;
128}
129
130/* adjust user map entry. this may result in shortening of existing map, or in
131 * splitting existing map in two pieces.
132 */
133static void
134adjust_map(struct user_mem_map *src, struct user_mem_map *end,
135 uint64_t remove_va_start, uint64_t remove_len)
136{
137 /* if va start is same as start address, we're simply moving start */
138 if (remove_va_start == src->addr) {
139 src->addr += remove_len;
140 src->iova += remove_len;
141 src->len -= remove_len;
142 } else if (remove_va_start + remove_len == src->addr + src->len) {
143 /* we're shrinking mapping from the end */
144 src->len -= remove_len;
145 } else {
146 /* we're blowing a hole in the middle */
147 struct user_mem_map tmp;
148 uint64_t total_len = src->len;
149
150 /* adjust source segment length */
151 src->len = remove_va_start - src->addr;
152
153 /* create temporary segment in the middle */
154 tmp.addr = src->addr + src->len;
155 tmp.iova = src->iova + src->len;
156 tmp.len = remove_len;
157
158 /* populate end segment - this one we will be keeping */
159 end->addr = tmp.addr + tmp.len;
160 end->iova = tmp.iova + tmp.len;
161 end->len = total_len - src->len - tmp.len;
162 }
163}
164
165/* try merging two maps into one, return 1 if succeeded */
166static int
167merge_map(struct user_mem_map *left, struct user_mem_map *right)
168{
169 if (left->addr + left->len != right->addr)
170 return 0;
171 if (left->iova + left->len != right->iova)
172 return 0;
173
174 left->len += right->len;
175
176 memset(right, 0, sizeof(*right));
177
178 return 1;
179}
180
181static struct user_mem_map *
182find_user_mem_map(struct user_mem_maps *user_mem_maps, uint64_t addr,
183 uint64_t iova, uint64_t len)
184{
185 uint64_t va_end = addr + len;
186 uint64_t iova_end = iova + len;
187 int i;
188
189 for (i = 0; i < user_mem_maps->n_maps; i++) {
190 struct user_mem_map *map = &user_mem_maps->maps[i];
191 uint64_t map_va_end = map->addr + map->len;
192 uint64_t map_iova_end = map->iova + map->len;
193
194 /* check start VA */
195 if (addr < map->addr || addr >= map_va_end)
196 continue;
197 /* check if VA end is within boundaries */
198 if (va_end <= map->addr || va_end > map_va_end)
199 continue;
200
201 /* check start IOVA */
202 if (iova < map->iova || iova >= map_iova_end)
203 continue;
204 /* check if IOVA end is within boundaries */
205 if (iova_end <= map->iova || iova_end > map_iova_end)
206 continue;
207
208 /* we've found our map */
209 return map;
210 }
211 return NULL((void*)0);
212}
213
214/* this will sort all user maps, and merge/compact any adjacent maps */
215static void
216compact_user_maps(struct user_mem_maps *user_mem_maps)
217{
218 int i, n_merged, cur_idx;
219
220 qsort(user_mem_maps->maps, user_mem_maps->n_maps,
221 sizeof(user_mem_maps->maps[0]), user_mem_map_cmp);
222
223 /* we'll go over the list backwards when merging */
224 n_merged = 0;
225 for (i = user_mem_maps->n_maps - 2; i >= 0; i--) {
226 struct user_mem_map *l, *r;
227
228 l = &user_mem_maps->maps[i];
229 r = &user_mem_maps->maps[i + 1];
230
231 if (is_null_map(l) || is_null_map(r))
232 continue;
233
234 if (merge_map(l, r))
235 n_merged++;
236 }
237
238 /* the entries are still sorted, but now they have holes in them, so
239 * walk through the list and remove the holes
240 */
241 if (n_merged > 0) {
242 cur_idx = 0;
243 for (i = 0; i < user_mem_maps->n_maps; i++) {
244 if (!is_null_map(&user_mem_maps->maps[i])) {
245 struct user_mem_map *src, *dst;
246
247 src = &user_mem_maps->maps[i];
248 dst = &user_mem_maps->maps[cur_idx++];
249
250 if (src != dst) {
251 memcpy(dst, src, sizeof(*src));
252 memset(src, 0, sizeof(*src));
253 }
254 }
255 }
256 user_mem_maps->n_maps = cur_idx;
257 }
258}
259
260static int
261vfio_open_group_fd(int iommu_group_num)
262{
263 int vfio_group_fd;
264 char filename[PATH_MAX4096];
265 struct rte_mp_msg mp_req, *mp_rep;
266 struct rte_mp_reply mp_reply;
267 struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
268 struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
269
270 /* if primary, try to open the group */
271 if (internal_config.process_type == RTE_PROC_PRIMARY) {
272 /* try regular group format */
273 snprintf(filename, sizeof(filename),
274 VFIO_GROUP_FMT"/dev/vfio/%u", iommu_group_num);
275 vfio_group_fd = open(filename, O_RDWR02);
276 if (vfio_group_fd < 0) {
277 /* if file not found, it's not an error */
278 if (errno(*__errno_location ()) != ENOENT2) {
279 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", filename,rte_log(4U, 0, "EAL" ": " "Cannot open %s: %s\n", filename, strerror
((*__errno_location ())))
280 strerror(errno))rte_log(4U, 0, "EAL" ": " "Cannot open %s: %s\n", filename, strerror
((*__errno_location ())));
281 return -1;
282 }
283
284 /* special case: try no-IOMMU path as well */
285 snprintf(filename, sizeof(filename),
286 VFIO_NOIOMMU_GROUP_FMT"/dev/vfio/noiommu-%u",
287 iommu_group_num);
288 vfio_group_fd = open(filename, O_RDWR02);
289 if (vfio_group_fd < 0) {
290 if (errno(*__errno_location ()) != ENOENT2) {
291 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", filename,rte_log(4U, 0, "EAL" ": " "Cannot open %s: %s\n", filename, strerror
((*__errno_location ())))
292 strerror(errno))rte_log(4U, 0, "EAL" ": " "Cannot open %s: %s\n", filename, strerror
((*__errno_location ())));
293 return -1;
294 }
295 return 0;
296 }
297 /* noiommu group found */
298 }
299
300 return vfio_group_fd;
301 }
302 /* if we're in a secondary process, request group fd from the primary
303 * process via mp channel.
304 */
305 p->req = SOCKET_REQ_GROUP0x200;
306 p->group_num = iommu_group_num;
307 strcpy(mp_req.name, EAL_VFIO_MP"eal_vfio_mp_sync");
308 mp_req.len_param = sizeof(*p);
309 mp_req.num_fds = 0;
310
311 vfio_group_fd = -1;
312 if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
313 mp_reply.nb_received == 1) {
314 mp_rep = &mp_reply.msgs[0];
315 p = (struct vfio_mp_param *)mp_rep->param;
316 if (p->result == SOCKET_OK0x0 && mp_rep->num_fds == 1) {
317 vfio_group_fd = mp_rep->fds[0];
318 } else if (p->result == SOCKET_NO_FD0x1) {
319 RTE_LOG(ERR, EAL, " bad VFIO group fd\n")rte_log(4U, 0, "EAL" ": " " bad VFIO group fd\n");
320 vfio_group_fd = 0;
321 }
322 free(mp_reply.msgs);
323 }
324
325 if (vfio_group_fd < 0)
326 RTE_LOG(ERR, EAL, " cannot request group fd\n")rte_log(4U, 0, "EAL" ": " " cannot request group fd\n");
327 return vfio_group_fd;
328}
329
330static struct vfio_config *
331get_vfio_cfg_by_group_num(int iommu_group_num)
332{
333 struct vfio_config *vfio_cfg;
334 int i, j;
335
336 for (i = 0; i < VFIO_MAX_CONTAINERS64; i++) {
337 vfio_cfg = &vfio_cfgs[i];
338 for (j = 0; j < VFIO_MAX_GROUPS64; j++) {
339 if (vfio_cfg->vfio_groups[j].group_num ==
340 iommu_group_num)
341 return vfio_cfg;
342 }
343 }
344
345 return NULL((void*)0);
346}
347
348static int
349vfio_get_group_fd(struct vfio_config *vfio_cfg,
350 int iommu_group_num)
351{
352 int i;
353 int vfio_group_fd;
354 struct vfio_group *cur_grp;
355
356 /* check if we already have the group descriptor open */
357 for (i = 0; i < VFIO_MAX_GROUPS64; i++)
358 if (vfio_cfg->vfio_groups[i].group_num == iommu_group_num)
359 return vfio_cfg->vfio_groups[i].fd;
360
361 /* Lets see first if there is room for a new group */
362 if (vfio_cfg->vfio_active_groups == VFIO_MAX_GROUPS64) {
363 RTE_LOG(ERR, EAL, "Maximum number of VFIO groups reached!\n")rte_log(4U, 0, "EAL" ": " "Maximum number of VFIO groups reached!\n"
);
364 return -1;
365 }
366
367 /* Now lets get an index for the new group */
368 for (i = 0; i < VFIO_MAX_GROUPS64; i++)
369 if (vfio_cfg->vfio_groups[i].group_num == -1) {
370 cur_grp = &vfio_cfg->vfio_groups[i];
371 break;
372 }
373
374 /* This should not happen */
375 if (i == VFIO_MAX_GROUPS64) {
376 RTE_LOG(ERR, EAL, "No VFIO group free slot found\n")rte_log(4U, 0, "EAL" ": " "No VFIO group free slot found\n");
377 return -1;
378 }
379
380 vfio_group_fd = vfio_open_group_fd(iommu_group_num);
381 if (vfio_group_fd < 0) {
382 RTE_LOG(ERR, EAL, "Failed to open group %d\n", iommu_group_num)rte_log(4U, 0, "EAL" ": " "Failed to open group %d\n", iommu_group_num
);
383 return -1;
384 }
385
386 cur_grp->group_num = iommu_group_num;
387 cur_grp->fd = vfio_group_fd;
388 vfio_cfg->vfio_active_groups++;
389
390 return vfio_group_fd;
391}
392
393static struct vfio_config *
394get_vfio_cfg_by_group_fd(int vfio_group_fd)
395{
396 struct vfio_config *vfio_cfg;
397 int i, j;
398
399 for (i = 0; i < VFIO_MAX_CONTAINERS64; i++) {
400 vfio_cfg = &vfio_cfgs[i];
401 for (j = 0; j < VFIO_MAX_GROUPS64; j++)
402 if (vfio_cfg->vfio_groups[j].fd == vfio_group_fd)
403 return vfio_cfg;
404 }
405
406 return NULL((void*)0);
407}
408
409static struct vfio_config *
410get_vfio_cfg_by_container_fd(int container_fd)
411{
412 int i;
413
414 for (i = 0; i < VFIO_MAX_CONTAINERS64; i++) {
415 if (vfio_cfgs[i].vfio_container_fd == container_fd)
416 return &vfio_cfgs[i];
417 }
418
419 return NULL((void*)0);
420}
421
422int
423rte_vfio_get_group_fd(int iommu_group_num)
424{
425 struct vfio_config *vfio_cfg;
426
427 /* get the vfio_config it belongs to */
428 vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
429 vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
430
431 return vfio_get_group_fd(vfio_cfg, iommu_group_num);
432}
433
434static int
435get_vfio_group_idx(int vfio_group_fd)
436{
437 struct vfio_config *vfio_cfg;
438 int i, j;
439
440 for (i = 0; i < VFIO_MAX_CONTAINERS64; i++) {
441 vfio_cfg = &vfio_cfgs[i];
442 for (j = 0; j < VFIO_MAX_GROUPS64; j++)
443 if (vfio_cfg->vfio_groups[j].fd == vfio_group_fd)
444 return j;
445 }
446
447 return -1;
448}
449
450static void
451vfio_group_device_get(int vfio_group_fd)
452{
453 struct vfio_config *vfio_cfg;
454 int i;
455
456 vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
457 if (vfio_cfg == NULL((void*)0)) {
458 RTE_LOG(ERR, EAL, " invalid group fd!\n")rte_log(4U, 0, "EAL" ": " " invalid group fd!\n");
459 return;
460 }
461
462 i = get_vfio_group_idx(vfio_group_fd);
463 if (i < 0 || i > (VFIO_MAX_GROUPS64 - 1))
464 RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i)rte_log(4U, 0, "EAL" ": " " wrong vfio_group index (%d)\n", i
);
465 else
466 vfio_cfg->vfio_groups[i].devices++;
467}
468
469static void
470vfio_group_device_put(int vfio_group_fd)
471{
472 struct vfio_config *vfio_cfg;
473 int i;
474
475 vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
476 if (vfio_cfg == NULL((void*)0)) {
477 RTE_LOG(ERR, EAL, " invalid group fd!\n")rte_log(4U, 0, "EAL" ": " " invalid group fd!\n");
478 return;
479 }
480
481 i = get_vfio_group_idx(vfio_group_fd);
482 if (i < 0 || i > (VFIO_MAX_GROUPS64 - 1))
483 RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i)rte_log(4U, 0, "EAL" ": " " wrong vfio_group index (%d)\n", i
);
484 else
485 vfio_cfg->vfio_groups[i].devices--;
486}
487
488static int
489vfio_group_device_count(int vfio_group_fd)
490{
491 struct vfio_config *vfio_cfg;
492 int i;
493
494 vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
495 if (vfio_cfg == NULL((void*)0)) {
496 RTE_LOG(ERR, EAL, " invalid group fd!\n")rte_log(4U, 0, "EAL" ": " " invalid group fd!\n");
497 return -1;
498 }
499
500 i = get_vfio_group_idx(vfio_group_fd);
501 if (i < 0 || i > (VFIO_MAX_GROUPS64 - 1)) {
502 RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i)rte_log(4U, 0, "EAL" ": " " wrong vfio_group index (%d)\n", i
);
503 return -1;
504 }
505
506 return vfio_cfg->vfio_groups[i].devices;
507}
508
509static void
510vfio_mem_event_callback(enum rte_mem_event type, const void *addr, size_t len,
511 void *arg __rte_unused__attribute__((__unused__)))
512{
513 struct rte_memseg_list *msl;
514 struct rte_memseg *ms;
515 size_t cur_len = 0;
516
517 msl = rte_mem_virt2memseg_list(addr);
518
519 /* for IOVA as VA mode, no need to care for IOVA addresses */
520 if (rte_eal_iova_mode() == RTE_IOVA_VA && msl->external == 0) {
521 uint64_t vfio_va = (uint64_t)(uintptr_t)addr;
522 if (type == RTE_MEM_EVENT_ALLOC)
523 vfio_dma_mem_map(default_vfio_cfg, vfio_va, vfio_va,
524 len, 1);
525 else
526 vfio_dma_mem_map(default_vfio_cfg, vfio_va, vfio_va,
527 len, 0);
528 return;
529 }
530
531 /* memsegs are contiguous in memory */
532 ms = rte_mem_virt2memseg(addr, msl);
533 while (cur_len < len) {
534 /* some memory segments may have invalid IOVA */
535 if (ms->iova == RTE_BAD_IOVA((rte_iova_t)-1)) {
536 RTE_LOG(DEBUG, EAL, "Memory segment at %p has bad IOVA, skipping\n",rte_log(8U, 0, "EAL" ": " "Memory segment at %p has bad IOVA, skipping\n"
, ms->addr)
537 ms->addr)rte_log(8U, 0, "EAL" ": " "Memory segment at %p has bad IOVA, skipping\n"
, ms->addr);
538 goto next;
539 }
540 if (type == RTE_MEM_EVENT_ALLOC)
541 vfio_dma_mem_map(default_vfio_cfg, ms->addr_64,
542 ms->iova, ms->len, 1);
543 else
544 vfio_dma_mem_map(default_vfio_cfg, ms->addr_64,
545 ms->iova, ms->len, 0);
546next:
547 cur_len += ms->len;
548 ++ms;
549 }
550}
551
552static int
553vfio_sync_default_container(void)
554{
555 struct rte_mp_msg mp_req, *mp_rep;
556 struct rte_mp_reply mp_reply;
557 struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
558 struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
559 int iommu_type_id;
560 unsigned int i;
561
562 /* cannot be called from primary */
563 if (rte_eal_process_type() != RTE_PROC_SECONDARY)
564 return -1;
565
566 /* default container fd should have been opened in rte_vfio_enable() */
567 if (!default_vfio_cfg->vfio_enabled ||
568 default_vfio_cfg->vfio_container_fd < 0) {
569 RTE_LOG(ERR, EAL, "VFIO support is not initialized\n")rte_log(4U, 0, "EAL" ": " "VFIO support is not initialized\n"
);
570 return -1;
571 }
572
573 /* find default container's IOMMU type */
574 p->req = SOCKET_REQ_IOMMU_TYPE0x800;
575 strcpy(mp_req.name, EAL_VFIO_MP"eal_vfio_mp_sync");
576 mp_req.len_param = sizeof(*p);
577 mp_req.num_fds = 0;
578
579 iommu_type_id = -1;
580 if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
581 mp_reply.nb_received == 1) {
582 mp_rep = &mp_reply.msgs[0];
583 p = (struct vfio_mp_param *)mp_rep->param;
584 if (p->result == SOCKET_OK0x0)
585 iommu_type_id = p->iommu_type_id;
586 free(mp_reply.msgs);
587 }
588 if (iommu_type_id < 0) {
589 RTE_LOG(ERR, EAL, "Could not get IOMMU type for default container\n")rte_log(4U, 0, "EAL" ": " "Could not get IOMMU type for default container\n"
);
590 return -1;
591 }
592
593 /* we now have an fd for default container, as well as its IOMMU type.
594 * now, set up default VFIO container config to match.
595 */
596 for (i = 0; i < RTE_DIM(iommu_types)(sizeof (iommu_types) / sizeof ((iommu_types)[0])); i++) {
597 const struct vfio_iommu_type *t = &iommu_types[i];
598 if (t->type_id != iommu_type_id)
599 continue;
600
601 /* we found our IOMMU type */
602 default_vfio_cfg->vfio_iommu_type = t;
603
604 return 0;
605 }
606 RTE_LOG(ERR, EAL, "Could not find IOMMU type id (%i)\n",rte_log(4U, 0, "EAL" ": " "Could not find IOMMU type id (%i)\n"
, iommu_type_id)
607 iommu_type_id)rte_log(4U, 0, "EAL" ": " "Could not find IOMMU type id (%i)\n"
, iommu_type_id);
608 return -1;
609}
610
611int
612rte_vfio_clear_group(int vfio_group_fd)
613{
614 int i;
615 struct vfio_config *vfio_cfg;
616
617 vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
618 if (vfio_cfg == NULL((void*)0)) {
619 RTE_LOG(ERR, EAL, " invalid group fd!\n")rte_log(4U, 0, "EAL" ": " " invalid group fd!\n");
620 return -1;
621 }
622
623 i = get_vfio_group_idx(vfio_group_fd);
624 if (i < 0)
625 return -1;
626 vfio_cfg->vfio_groups[i].group_num = -1;
627 vfio_cfg->vfio_groups[i].fd = -1;
628 vfio_cfg->vfio_groups[i].devices = 0;
629 vfio_cfg->vfio_active_groups--;
630
631 return 0;
632}
633
634int
635rte_vfio_setup_device(const char *sysfs_base, const char *dev_addr,
636 int *vfio_dev_fd, struct vfio_device_info *device_info)
637{
638 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
639 rte_rwlock_t *mem_lock = &mcfg->memory_hotplug_lock;
640 struct vfio_group_status group_status = {
641 .argsz = sizeof(group_status)
642 };
643 struct vfio_config *vfio_cfg;
644 struct user_mem_maps *user_mem_maps;
645 int vfio_container_fd;
646 int vfio_group_fd;
647 int iommu_group_num;
648 int i, ret;
649
650 /* get group number */
651 ret = rte_vfio_get_group_num(sysfs_base, dev_addr, &iommu_group_num);
652 if (ret == 0) {
653 RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver, skipping\n",rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver, skipping\n"
, dev_addr)
654 dev_addr)rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver, skipping\n"
, dev_addr);
655 return 1;
656 }
657
658 /* if negative, something failed */
659 if (ret < 0)
660 return -1;
661
662 /* get the actual group fd */
663 vfio_group_fd = rte_vfio_get_group_fd(iommu_group_num);
664 if (vfio_group_fd < 0)
665 return -1;
666
667 /* if group_fd == 0, that means the device isn't managed by VFIO */
668 if (vfio_group_fd == 0) {
669 RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver, skipping\n",rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver, skipping\n"
, dev_addr)
670 dev_addr)rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver, skipping\n"
, dev_addr);
671 return 1;
672 }
673
674 /*
675 * at this point, we know that this group is viable (meaning, all devices
676 * are either bound to VFIO or not bound to anything)
677 */
678
679 /* check if the group is viable */
680 ret = ioctl(vfio_group_fd, VFIO_GROUP_GET_STATUS(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 3)) << 0) | ((0) << ((0 +8)+8))), &group_status);
681 if (ret) {
682 RTE_LOG(ERR, EAL, " %s cannot get group status, "rte_log(4U, 0, "EAL" ": " " %s cannot get group status, " "error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())))
683 "error %i (%s)\n", dev_addr, errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " %s cannot get group status, " "error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())));
684 close(vfio_group_fd);
685 rte_vfio_clear_group(vfio_group_fd);
686 return -1;
687 } else if (!(group_status.flags & VFIO_GROUP_FLAGS_VIABLE(1 << 0))) {
688 RTE_LOG(ERR, EAL, " %s VFIO group is not viable! "rte_log(4U, 0, "EAL" ": " " %s VFIO group is not viable! " "Not all devices in IOMMU group bound to VFIO or unbound\n"
, dev_addr)
689 "Not all devices in IOMMU group bound to VFIO or unbound\n",rte_log(4U, 0, "EAL" ": " " %s VFIO group is not viable! " "Not all devices in IOMMU group bound to VFIO or unbound\n"
, dev_addr)
690 dev_addr)rte_log(4U, 0, "EAL" ": " " %s VFIO group is not viable! " "Not all devices in IOMMU group bound to VFIO or unbound\n"
, dev_addr);
691 close(vfio_group_fd);
692 rte_vfio_clear_group(vfio_group_fd);
693 return -1;
694 }
695
696 /* get the vfio_config it belongs to */
697 vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
698 vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
699 vfio_container_fd = vfio_cfg->vfio_container_fd;
700 user_mem_maps = &vfio_cfg->mem_maps;
701
702 /* check if group does not have a container yet */
703 if (!(group_status.flags & VFIO_GROUP_FLAGS_CONTAINER_SET(1 << 1))) {
704
705 /* add group to a container */
706 ret = ioctl(vfio_group_fd, VFIO_GROUP_SET_CONTAINER(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 4)) << 0) | ((0) << ((0 +8)+8))),
707 &vfio_container_fd);
708 if (ret) {
709 RTE_LOG(ERR, EAL, " %s cannot add VFIO group to container, "rte_log(4U, 0, "EAL" ": " " %s cannot add VFIO group to container, "
"error %i (%s)\n", dev_addr, (*__errno_location ()), strerror
((*__errno_location ())))
710 "error %i (%s)\n", dev_addr, errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " %s cannot add VFIO group to container, "
"error %i (%s)\n", dev_addr, (*__errno_location ()), strerror
((*__errno_location ())));
711 close(vfio_group_fd);
712 rte_vfio_clear_group(vfio_group_fd);
713 return -1;
714 }
715
716 /*
717 * pick an IOMMU type and set up DMA mappings for container
718 *
719 * needs to be done only once, only when first group is
720 * assigned to a container and only in primary process.
721 * Note this can happen several times with the hotplug
722 * functionality.
723 */
724 if (internal_config.process_type == RTE_PROC_PRIMARY &&
725 vfio_cfg->vfio_active_groups == 1 &&
726 vfio_group_device_count(vfio_group_fd) == 0) {
727 const struct vfio_iommu_type *t;
728
729 /* select an IOMMU type which we will be using */
730 t = vfio_set_iommu_type(vfio_container_fd);
731 if (!t) {
732 RTE_LOG(ERR, EAL,rte_log(4U, 0, "EAL" ": " " %s failed to select IOMMU type\n"
, dev_addr)
733 " %s failed to select IOMMU type\n",rte_log(4U, 0, "EAL" ": " " %s failed to select IOMMU type\n"
, dev_addr)
734 dev_addr)rte_log(4U, 0, "EAL" ": " " %s failed to select IOMMU type\n"
, dev_addr);
735 close(vfio_group_fd);
736 rte_vfio_clear_group(vfio_group_fd);
737 return -1;
738 }
739 /* lock memory hotplug before mapping and release it
740 * after registering callback, to prevent races
741 */
742 rte_rwlock_read_lock(mem_lock);
743 if (vfio_cfg == default_vfio_cfg)
744 ret = t->dma_map_func(vfio_container_fd);
745 else
746 ret = 0;
747 if (ret) {
748 RTE_LOG(ERR, EAL,rte_log(4U, 0, "EAL" ": " " %s DMA remapping failed, error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())))
749 " %s DMA remapping failed, error %i (%s)\n",rte_log(4U, 0, "EAL" ": " " %s DMA remapping failed, error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())))
750 dev_addr, errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " %s DMA remapping failed, error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())));
751 close(vfio_group_fd);
752 rte_vfio_clear_group(vfio_group_fd);
753 rte_rwlock_read_unlock(mem_lock);
754 return -1;
755 }
756
757 vfio_cfg->vfio_iommu_type = t;
758
759 /* re-map all user-mapped segments */
760 rte_spinlock_recursive_lock(&user_mem_maps->lock);
761
762 /* this IOMMU type may not support DMA mapping, but
763 * if we have mappings in the list - that means we have
764 * previously mapped something successfully, so we can
765 * be sure that DMA mapping is supported.
766 */
767 for (i = 0; i < user_mem_maps->n_maps; i++) {
768 struct user_mem_map *map;
769 map = &user_mem_maps->maps[i];
770
771 ret = t->dma_user_map_func(
772 vfio_container_fd,
773 map->addr, map->iova, map->len,
774 1);
775 if (ret) {
776 RTE_LOG(ERR, EAL, "Couldn't map user memory for DMA: "rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len)
777 "va: 0x%" PRIx64 " "rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len)
778 "iova: 0x%" PRIx64 " "rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len)
779 "len: 0x%" PRIu64 "\n",rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len)
780 map->addr, map->iova,rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len)
781 map->len)rte_log(4U, 0, "EAL" ": " "Couldn't map user memory for DMA: "
"va: 0x%" "l" "x" " " "iova: 0x%" "l" "x" " " "len: 0x%" "l"
"u" "\n", map->addr, map->iova, map->len);
782 rte_spinlock_recursive_unlock(
783 &user_mem_maps->lock);
784 rte_rwlock_read_unlock(mem_lock);
785 return -1;
786 }
787 }
788 rte_spinlock_recursive_unlock(&user_mem_maps->lock);
789
790 /* register callback for mem events */
791 if (vfio_cfg == default_vfio_cfg)
792 ret = rte_mem_event_callback_register(
793 VFIO_MEM_EVENT_CLB_NAME"vfio_mem_event_clb",
794 vfio_mem_event_callback, NULL((void*)0));
795 else
796 ret = 0;
797 /* unlock memory hotplug */
798 rte_rwlock_read_unlock(mem_lock);
799
800 if (ret && rte_errno(per_lcore__rte_errno) != ENOTSUP95) {
801 RTE_LOG(ERR, EAL, "Could not install memory event callback for VFIO\n")rte_log(4U, 0, "EAL" ": " "Could not install memory event callback for VFIO\n"
);
802 return -1;
803 }
804 if (ret)
805 RTE_LOG(DEBUG, EAL, "Memory event callbacks not supported\n")rte_log(8U, 0, "EAL" ": " "Memory event callbacks not supported\n"
);
806 else
807 RTE_LOG(DEBUG, EAL, "Installed memory event callback for VFIO\n")rte_log(8U, 0, "EAL" ": " "Installed memory event callback for VFIO\n"
);
808 }
809 } else if (rte_eal_process_type() != RTE_PROC_PRIMARY &&
810 vfio_cfg == default_vfio_cfg &&
811 vfio_cfg->vfio_iommu_type == NULL((void*)0)) {
812 /* if we're not a primary process, we do not set up the VFIO
813 * container because it's already been set up by the primary
814 * process. instead, we simply ask the primary about VFIO type
815 * we are using, and set the VFIO config up appropriately.
816 */
817 ret = vfio_sync_default_container();
818 if (ret < 0) {
819 RTE_LOG(ERR, EAL, "Could not sync default VFIO container\n")rte_log(4U, 0, "EAL" ": " "Could not sync default VFIO container\n"
);
820 close(vfio_group_fd);
821 rte_vfio_clear_group(vfio_group_fd);
822 return -1;
823 }
824 /* we have successfully initialized VFIO, notify user */
825 const struct vfio_iommu_type *t =
826 default_vfio_cfg->vfio_iommu_type;
827 RTE_LOG(NOTICE, EAL, " using IOMMU type %d (%s)\n",rte_log(6U, 0, "EAL" ": " " using IOMMU type %d (%s)\n", t->
type_id, t->name)
828 t->type_id, t->name)rte_log(6U, 0, "EAL" ": " " using IOMMU type %d (%s)\n", t->
type_id, t->name);
829 }
830
831 /* get a file descriptor for the device */
832 *vfio_dev_fd = ioctl(vfio_group_fd, VFIO_GROUP_GET_DEVICE_FD(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 6)) << 0) | ((0) << ((0 +8)+8))), dev_addr);
833 if (*vfio_dev_fd < 0) {
834 /* if we cannot get a device fd, this implies a problem with
835 * the VFIO group or the container not having IOMMU configured.
836 */
837
838 RTE_LOG(WARNING, EAL, "Getting a vfio_dev_fd for %s failed\n",rte_log(5U, 0, "EAL" ": " "Getting a vfio_dev_fd for %s failed\n"
, dev_addr)
839 dev_addr)rte_log(5U, 0, "EAL" ": " "Getting a vfio_dev_fd for %s failed\n"
, dev_addr);
840 close(vfio_group_fd);
841 rte_vfio_clear_group(vfio_group_fd);
842 return -1;
843 }
844
845 /* test and setup the device */
846 ret = ioctl(*vfio_dev_fd, VFIO_DEVICE_GET_INFO(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 7)) << 0) | ((0) << ((0 +8)+8))), device_info);
847 if (ret) {
848 RTE_LOG(ERR, EAL, " %s cannot get device info, "rte_log(4U, 0, "EAL" ": " " %s cannot get device info, " "error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())))
849 "error %i (%s)\n", dev_addr, errno,rte_log(4U, 0, "EAL" ": " " %s cannot get device info, " "error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())))
850 strerror(errno))rte_log(4U, 0, "EAL" ": " " %s cannot get device info, " "error %i (%s)\n"
, dev_addr, (*__errno_location ()), strerror((*__errno_location
())));
851 close(*vfio_dev_fd);
852 close(vfio_group_fd);
853 rte_vfio_clear_group(vfio_group_fd);
854 return -1;
855 }
856 vfio_group_device_get(vfio_group_fd);
857
858 return 0;
859}
860
861int
862rte_vfio_release_device(const char *sysfs_base, const char *dev_addr,
863 int vfio_dev_fd)
864{
865 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
866 rte_rwlock_t *mem_lock = &mcfg->memory_hotplug_lock;
867 struct vfio_group_status group_status = {
868 .argsz = sizeof(group_status)
869 };
870 struct vfio_config *vfio_cfg;
871 int vfio_group_fd;
872 int iommu_group_num;
873 int ret;
874
875 /* we don't want any DMA mapping messages to come while we're detaching
876 * VFIO device, because this might be the last device and we might need
877 * to unregister the callback.
878 */
879 rte_rwlock_read_lock(mem_lock);
880
881 /* get group number */
882 ret = rte_vfio_get_group_num(sysfs_base, dev_addr, &iommu_group_num);
883 if (ret <= 0) {
884 RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver\n",rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver\n"
, dev_addr)
885 dev_addr)rte_log(5U, 0, "EAL" ": " " %s not managed by VFIO driver\n"
, dev_addr);
886 /* This is an error at this point. */
887 ret = -1;
888 goto out;
889 }
890
891 /* get the actual group fd */
892 vfio_group_fd = rte_vfio_get_group_fd(iommu_group_num);
893 if (vfio_group_fd <= 0) {
894 RTE_LOG(INFO, EAL, "rte_vfio_get_group_fd failed for %s\n",rte_log(7U, 0, "EAL" ": " "rte_vfio_get_group_fd failed for %s\n"
, dev_addr)
895 dev_addr)rte_log(7U, 0, "EAL" ": " "rte_vfio_get_group_fd failed for %s\n"
, dev_addr);
896 ret = -1;
897 goto out;
898 }
899
900 /* get the vfio_config it belongs to */
901 vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
902 vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
903
904 /* At this point we got an active group. Closing it will make the
905 * container detachment. If this is the last active group, VFIO kernel
906 * code will unset the container and the IOMMU mappings.
907 */
908
909 /* Closing a device */
910 if (close(vfio_dev_fd) < 0) {
911 RTE_LOG(INFO, EAL, "Error when closing vfio_dev_fd for %s\n",rte_log(7U, 0, "EAL" ": " "Error when closing vfio_dev_fd for %s\n"
, dev_addr)
912 dev_addr)rte_log(7U, 0, "EAL" ": " "Error when closing vfio_dev_fd for %s\n"
, dev_addr);
913 ret = -1;
914 goto out;
915 }
916
917 /* An VFIO group can have several devices attached. Just when there is
918 * no devices remaining should the group be closed.
919 */
920 vfio_group_device_put(vfio_group_fd);
921 if (!vfio_group_device_count(vfio_group_fd)) {
922
923 if (close(vfio_group_fd) < 0) {
924 RTE_LOG(INFO, EAL, "Error when closing vfio_group_fd for %s\n",rte_log(7U, 0, "EAL" ": " "Error when closing vfio_group_fd for %s\n"
, dev_addr)
925 dev_addr)rte_log(7U, 0, "EAL" ": " "Error when closing vfio_group_fd for %s\n"
, dev_addr);
926 ret = -1;
927 goto out;
928 }
929
930 if (rte_vfio_clear_group(vfio_group_fd) < 0) {
931 RTE_LOG(INFO, EAL, "Error when clearing group for %s\n",rte_log(7U, 0, "EAL" ": " "Error when clearing group for %s\n"
, dev_addr)
932 dev_addr)rte_log(7U, 0, "EAL" ": " "Error when clearing group for %s\n"
, dev_addr);
933 ret = -1;
934 goto out;
935 }
936 }
937
938 /* if there are no active device groups, unregister the callback to
939 * avoid spurious attempts to map/unmap memory from VFIO.
940 */
941 if (vfio_cfg == default_vfio_cfg && vfio_cfg->vfio_active_groups == 0 &&
942 rte_eal_process_type() != RTE_PROC_SECONDARY)
943 rte_mem_event_callback_unregister(VFIO_MEM_EVENT_CLB_NAME"vfio_mem_event_clb",
944 NULL((void*)0));
945
946 /* success */
947 ret = 0;
948
949out:
950 rte_rwlock_read_unlock(mem_lock);
951 return ret;
952}
953
954int
955rte_vfio_enable(const char *modname)
956{
957 /* initialize group list */
958 int i, j;
959 int vfio_available;
960
961 rte_spinlock_recursive_t lock = RTE_SPINLOCK_RECURSIVE_INITIALIZER{{ 0 }, -1, 0};
962
963 for (i = 0; i < VFIO_MAX_CONTAINERS64; i++) {
964 vfio_cfgs[i].vfio_container_fd = -1;
965 vfio_cfgs[i].vfio_active_groups = 0;
966 vfio_cfgs[i].vfio_iommu_type = NULL((void*)0);
967 vfio_cfgs[i].mem_maps.lock = lock;
968
969 for (j = 0; j < VFIO_MAX_GROUPS64; j++) {
970 vfio_cfgs[i].vfio_groups[j].fd = -1;
971 vfio_cfgs[i].vfio_groups[j].group_num = -1;
972 vfio_cfgs[i].vfio_groups[j].devices = 0;
973 }
974 }
975
976 /* inform the user that we are probing for VFIO */
977 RTE_LOG(INFO, EAL, "Probing VFIO support...\n")rte_log(7U, 0, "EAL" ": " "Probing VFIO support...\n");
978
979 /* check if vfio module is loaded */
980 vfio_available = rte_eal_check_module(modname);
981
982 /* return error directly */
983 if (vfio_available == -1) {
984 RTE_LOG(INFO, EAL, "Could not get loaded module details!\n")rte_log(7U, 0, "EAL" ": " "Could not get loaded module details!\n"
);
985 return -1;
986 }
987
988 /* return 0 if VFIO modules not loaded */
989 if (vfio_available == 0) {
990 RTE_LOG(DEBUG, EAL, "VFIO modules not loaded, "rte_log(8U, 0, "EAL" ": " "VFIO modules not loaded, " "skipping VFIO support...\n"
)
991 "skipping VFIO support...\n")rte_log(8U, 0, "EAL" ": " "VFIO modules not loaded, " "skipping VFIO support...\n"
);
992 return 0;
993 }
994
995 if (internal_config.process_type == RTE_PROC_PRIMARY) {
996 /* open a new container */
997 default_vfio_cfg->vfio_container_fd =
998 rte_vfio_get_container_fd();
999 } else {
1000 /* get the default container from the primary process */
1001 default_vfio_cfg->vfio_container_fd =
1002 vfio_get_default_container_fd();
1003 }
1004
1005 /* check if we have VFIO driver enabled */
1006 if (default_vfio_cfg->vfio_container_fd != -1) {
1007 RTE_LOG(NOTICE, EAL, "VFIO support initialized\n")rte_log(6U, 0, "EAL" ": " "VFIO support initialized\n");
1008 default_vfio_cfg->vfio_enabled = 1;
1009 } else {
1010 RTE_LOG(NOTICE, EAL, "VFIO support could not be initialized\n")rte_log(6U, 0, "EAL" ": " "VFIO support could not be initialized\n"
);
1011 }
1012
1013 return 0;
1014}
1015
1016int
1017rte_vfio_is_enabled(const char *modname)
1018{
1019 const int mod_available = rte_eal_check_module(modname) > 0;
1020 return default_vfio_cfg->vfio_enabled && mod_available;
1021}
1022
1023int
1024vfio_get_default_container_fd(void)
1025{
1026 struct rte_mp_msg mp_req, *mp_rep;
1027 struct rte_mp_reply mp_reply;
1028 struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
1029 struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
1030
1031 if (default_vfio_cfg->vfio_enabled)
1
Assuming the condition is false
→
2
←
Taking false branch
→
1032 return default_vfio_cfg->vfio_container_fd;
1033
1034 if (internal_config.process_type == RTE_PROC_PRIMARY) {
3
←
Assuming the condition is false
→
4
←
Taking false branch
→
1035 /* if we were secondary process we would try requesting
1036 * container fd from the primary, but we're the primary
1037 * process so just exit here
1038 */
1039 return -1;
1040 }
1041
1042 p->req = SOCKET_REQ_DEFAULT_CONTAINER0x400;
1043 strcpy(mp_req.name, EAL_VFIO_MP"eal_vfio_mp_sync");
1044 mp_req.len_param = sizeof(*p);
1045 mp_req.num_fds = 0;
1046
1047 if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
5
←
Assuming the condition is true
→
7
←
Taking true branch
→
1048 mp_reply.nb_received == 1) {
6
←
Assuming the condition is true
→
1049 mp_rep = &mp_reply.msgs[0];
1050 p = (struct vfio_mp_param *)mp_rep->param;
1051 if (p->result == SOCKET_OK0x0 && mp_rep->num_fds == 1) {
8
←
Assuming the condition is true
→
9
←
Assuming the condition is true
→
10
←
Taking true branch
→
1052 free(mp_reply.msgs);
11
←
Memory is released
→
1053 return mp_rep->fds[0];
12
←
Use of memory after it is freed
1054 }
1055 free(mp_reply.msgs);
1056 }
1057
1058 RTE_LOG(ERR, EAL, " cannot request default container fd\n")rte_log(4U, 0, "EAL" ": " " cannot request default container fd\n"
);
1059 return -1;
1060}
1061
1062int
1063vfio_get_iommu_type(void)
1064{
1065 if (default_vfio_cfg->vfio_iommu_type == NULL((void*)0))
1066 return -1;
1067
1068 return default_vfio_cfg->vfio_iommu_type->type_id;
1069}
1070
1071const struct vfio_iommu_type *
1072vfio_set_iommu_type(int vfio_container_fd)
1073{
1074 unsigned idx;
1075 for (idx = 0; idx < RTE_DIM(iommu_types)(sizeof (iommu_types) / sizeof ((iommu_types)[0])); idx++) {
1076 const struct vfio_iommu_type *t = &iommu_types[idx];
1077
1078 int ret = ioctl(vfio_container_fd, VFIO_SET_IOMMU(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 2)) << 0) | ((0) << ((0 +8)+8))),
1079 t->type_id);
1080 if (!ret) {
1081 RTE_LOG(NOTICE, EAL, " using IOMMU type %d (%s)\n",rte_log(6U, 0, "EAL" ": " " using IOMMU type %d (%s)\n", t->
type_id, t->name)
1082 t->type_id, t->name)rte_log(6U, 0, "EAL" ": " " using IOMMU type %d (%s)\n", t->
type_id, t->name);
1083 return t;
1084 }
1085 /* not an error, there may be more supported IOMMU types */
1086 RTE_LOG(DEBUG, EAL, " set IOMMU type %d (%s) failed, "rte_log(8U, 0, "EAL" ": " " set IOMMU type %d (%s) failed, "
"error %i (%s)\n", t->type_id, t->name, (*__errno_location
()), strerror((*__errno_location ())))
1087 "error %i (%s)\n", t->type_id, t->name, errno,rte_log(8U, 0, "EAL" ": " " set IOMMU type %d (%s) failed, "
"error %i (%s)\n", t->type_id, t->name, (*__errno_location
()), strerror((*__errno_location ())))
1088 strerror(errno))rte_log(8U, 0, "EAL" ": " " set IOMMU type %d (%s) failed, "
"error %i (%s)\n", t->type_id, t->name, (*__errno_location
()), strerror((*__errno_location ())));
1089 }
1090 /* if we didn't find a suitable IOMMU type, fail */
1091 return NULL((void*)0);
1092}
1093
1094int
1095vfio_has_supported_extensions(int vfio_container_fd)
1096{
1097 int ret;
1098 unsigned idx, n_extensions = 0;
1099 for (idx = 0; idx < RTE_DIM(iommu_types)(sizeof (iommu_types) / sizeof ((iommu_types)[0])); idx++) {
1100 const struct vfio_iommu_type *t = &iommu_types[idx];
1101
1102 ret = ioctl(vfio_container_fd, VFIO_CHECK_EXTENSION(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 1)) << 0) | ((0) << ((0 +8)+8))),
1103 t->type_id);
1104 if (ret < 0) {
1105 RTE_LOG(ERR, EAL, " could not get IOMMU type, "rte_log(4U, 0, "EAL" ": " " could not get IOMMU type, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1106 "error %i (%s)\n", errno,rte_log(4U, 0, "EAL" ": " " could not get IOMMU type, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1107 strerror(errno))rte_log(4U, 0, "EAL" ": " " could not get IOMMU type, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1108 close(vfio_container_fd);
1109 return -1;
1110 } else if (ret == 1) {
1111 /* we found a supported extension */
1112 n_extensions++;
1113 }
1114 RTE_LOG(DEBUG, EAL, " IOMMU type %d (%s) is %s\n",rte_log(8U, 0, "EAL" ": " " IOMMU type %d (%s) is %s\n", t->
type_id, t->name, ret ? "supported" : "not supported")
1115 t->type_id, t->name,rte_log(8U, 0, "EAL" ": " " IOMMU type %d (%s) is %s\n", t->
type_id, t->name, ret ? "supported" : "not supported")
1116 ret ? "supported" : "not supported")rte_log(8U, 0, "EAL" ": " " IOMMU type %d (%s) is %s\n", t->
type_id, t->name, ret ? "supported" : "not supported");
1117 }
1118
1119 /* if we didn't find any supported IOMMU types, fail */
1120 if (!n_extensions) {
1121 close(vfio_container_fd);
1122 return -1;
1123 }
1124
1125 return 0;
1126}
1127
1128int
1129rte_vfio_get_container_fd(void)
1130{
1131 int ret, vfio_container_fd;
1132 struct rte_mp_msg mp_req, *mp_rep;
1133 struct rte_mp_reply mp_reply;
1134 struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
1135 struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
1136
1137
1138 /* if we're in a primary process, try to open the container */
1139 if (internal_config.process_type == RTE_PROC_PRIMARY) {
1140 vfio_container_fd = open(VFIO_CONTAINER_PATH"/dev/vfio/vfio", O_RDWR02);
1141 if (vfio_container_fd < 0) {
1142 RTE_LOG(ERR, EAL, " cannot open VFIO container, "rte_log(4U, 0, "EAL" ": " " cannot open VFIO container, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1143 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot open VFIO container, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1144 return -1;
1145 }
1146
1147 /* check VFIO API version */
1148 ret = ioctl(vfio_container_fd, VFIO_GET_API_VERSION(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 0)) << 0) | ((0) << ((0 +8)+8))));
1149 if (ret != VFIO_API_VERSION0) {
1150 if (ret < 0)
1151 RTE_LOG(ERR, EAL, " could not get VFIO API version, "rte_log(4U, 0, "EAL" ": " " could not get VFIO API version, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())))
1152 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " could not get VFIO API version, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())));
1153 else
1154 RTE_LOG(ERR, EAL, " unsupported VFIO API version!\n")rte_log(4U, 0, "EAL" ": " " unsupported VFIO API version!\n"
);
1155 close(vfio_container_fd);
1156 return -1;
1157 }
1158
1159 ret = vfio_has_supported_extensions(vfio_container_fd);
1160 if (ret) {
1161 RTE_LOG(ERR, EAL, " no supported IOMMU "rte_log(4U, 0, "EAL" ": " " no supported IOMMU " "extensions found!\n"
)
1162 "extensions found!\n")rte_log(4U, 0, "EAL" ": " " no supported IOMMU " "extensions found!\n"
);
1163 return -1;
1164 }
1165
1166 return vfio_container_fd;
1167 }
1168 /*
1169 * if we're in a secondary process, request container fd from the
1170 * primary process via mp channel
1171 */
1172 p->req = SOCKET_REQ_CONTAINER0x100;
1173 strcpy(mp_req.name, EAL_VFIO_MP"eal_vfio_mp_sync");
1174 mp_req.len_param = sizeof(*p);
1175 mp_req.num_fds = 0;
1176
1177 vfio_container_fd = -1;
1178 if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
1179 mp_reply.nb_received == 1) {
1180 mp_rep = &mp_reply.msgs[0];
1181 p = (struct vfio_mp_param *)mp_rep->param;
1182 if (p->result == SOCKET_OK0x0 && mp_rep->num_fds == 1) {
1183 vfio_container_fd = mp_rep->fds[0];
1184 free(mp_reply.msgs);
1185 return vfio_container_fd;
1186 }
1187 free(mp_reply.msgs);
1188 }
1189
1190 RTE_LOG(ERR, EAL, " cannot request container fd\n")rte_log(4U, 0, "EAL" ": " " cannot request container fd\n");
1191 return -1;
1192}
1193
1194int
1195rte_vfio_get_group_num(const char *sysfs_base,
1196 const char *dev_addr, int *iommu_group_num)
1197{
1198 char linkname[PATH_MAX4096];
1199 char filename[PATH_MAX4096];
1200 char *tok[16], *group_tok, *end;
1201 int ret;
1202
1203 memset(linkname, 0, sizeof(linkname));
1204 memset(filename, 0, sizeof(filename));
1205
1206 /* try to find out IOMMU group for this device */
1207 snprintf(linkname, sizeof(linkname),
1208 "%s/%s/iommu_group", sysfs_base, dev_addr);
1209
1210 ret = readlink(linkname, filename, sizeof(filename));
1211
1212 /* if the link doesn't exist, no VFIO for us */
1213 if (ret < 0)
1214 return 0;
1215
1216 ret = rte_strsplit(filename, sizeof(filename),
1217 tok, RTE_DIM(tok)(sizeof (tok) / sizeof ((tok)[0])), '/');
1218
1219 if (ret <= 0) {
1220 RTE_LOG(ERR, EAL, " %s cannot get IOMMU group\n", dev_addr)rte_log(4U, 0, "EAL" ": " " %s cannot get IOMMU group\n", dev_addr
);
1221 return -1;
1222 }
1223
1224 /* IOMMU group is always the last token */
1225 errno(*__errno_location ()) = 0;
1226 group_tok = tok[ret - 1];
1227 end = group_tok;
1228 *iommu_group_num = strtol(group_tok, &end, 10);
1229 if ((end != group_tok && *end != '\0') || errno(*__errno_location ()) != 0) {
1230 RTE_LOG(ERR, EAL, " %s error parsing IOMMU number!\n", dev_addr)rte_log(4U, 0, "EAL" ": " " %s error parsing IOMMU number!\n"
, dev_addr);
1231 return -1;
1232 }
1233
1234 return 1;
1235}
1236
1237static int
1238type1_map(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
1239 void *arg)
1240{
1241 int *vfio_container_fd = arg;
1242
1243 if (msl->external)
1244 return 0;
1245
1246 return vfio_type1_dma_mem_map(*vfio_container_fd, ms->addr_64, ms->iova,
1247 ms->len, 1);
1248}
1249
1250static int
1251vfio_type1_dma_mem_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
1252 uint64_t len, int do_map)
1253{
1254 struct vfio_iommu_type1_dma_map dma_map;
1255 struct vfio_iommu_type1_dma_unmap dma_unmap;
1256 int ret;
1257
1258 if (do_map != 0) {
1259 memset(&dma_map, 0, sizeof(dma_map));
1260 dma_map.argsz = sizeof(struct vfio_iommu_type1_dma_map);
1261 dma_map.vaddr = vaddr;
1262 dma_map.size = len;
1263 dma_map.iova = iova;
1264 dma_map.flags = VFIO_DMA_MAP_FLAG_READ(1 << 0) |
1265 VFIO_DMA_MAP_FLAG_WRITE(1 << 1);
1266
1267 ret = ioctl(vfio_container_fd, VFIO_IOMMU_MAP_DMA(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 13)) << 0) | ((0) << ((0 +8)+8))), &dma_map);
1268 if (ret) {
1269 /**
1270 * In case the mapping was already done EEXIST will be
1271 * returned from kernel.
1272 */
1273 if (errno(*__errno_location ()) == EEXIST17) {
1274 RTE_LOG(DEBUG, EAL,rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping")
1275 " Memory segment is allready mapped,"rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping")
1276 " skipping")rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping");
1277 } else {
1278 RTE_LOG(ERR, EAL,rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1279 " cannot set up DMA remapping,"rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1280 " error %i (%s)\n",rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1281 errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1282 return -1;
1283 }
1284 }
1285 } else {
1286 memset(&dma_unmap, 0, sizeof(dma_unmap));
1287 dma_unmap.argsz = sizeof(struct vfio_iommu_type1_dma_unmap);
1288 dma_unmap.size = len;
1289 dma_unmap.iova = iova;
1290
1291 ret = ioctl(vfio_container_fd, VFIO_IOMMU_UNMAP_DMA(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 14)) << 0) | ((0) << ((0 +8)+8))),
1292 &dma_unmap);
1293 if (ret) {
1294 RTE_LOG(ERR, EAL, " cannot clear DMA remapping, error %i (%s)\n",rte_log(4U, 0, "EAL" ": " " cannot clear DMA remapping, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1295 errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot clear DMA remapping, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1296 return -1;
1297 }
1298 }
1299
1300 return 0;
1301}
1302
1303static int
1304vfio_type1_dma_map(int vfio_container_fd)
1305{
1306 return rte_memseg_walk(type1_map, &vfio_container_fd);
1307}
1308
1309static int
1310vfio_spapr_dma_do_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
1311 uint64_t len, int do_map)
1312{
1313 struct vfio_iommu_type1_dma_map dma_map;
1314 struct vfio_iommu_type1_dma_unmap dma_unmap;
1315 int ret;
1316 struct vfio_iommu_spapr_register_memory reg = {
1317 .argsz = sizeof(reg),
1318 .flags = 0
1319 };
1320 reg.vaddr = (uintptr_t) vaddr;
1321 reg.size = len;
1322
1323 if (do_map != 0) {
1324 ret = ioctl(vfio_container_fd,
1325 VFIO_IOMMU_SPAPR_REGISTER_MEMORY(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 17)) << 0) | ((0) << ((0 +8)+8))), &reg);
1326 if (ret) {
1327 RTE_LOG(ERR, EAL, " cannot register vaddr for IOMMU, "rte_log(4U, 0, "EAL" ": " " cannot register vaddr for IOMMU, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())))
1328 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot register vaddr for IOMMU, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())));
1329 return -1;
1330 }
1331
1332 memset(&dma_map, 0, sizeof(dma_map));
1333 dma_map.argsz = sizeof(struct vfio_iommu_type1_dma_map);
1334 dma_map.vaddr = vaddr;
1335 dma_map.size = len;
1336 dma_map.iova = iova;
1337 dma_map.flags = VFIO_DMA_MAP_FLAG_READ(1 << 0) |
1338 VFIO_DMA_MAP_FLAG_WRITE(1 << 1);
1339
1340 ret = ioctl(vfio_container_fd, VFIO_IOMMU_MAP_DMA(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 13)) << 0) | ((0) << ((0 +8)+8))), &dma_map);
1341 if (ret) {
1342 /**
1343 * In case the mapping was already done EBUSY will be
1344 * returned from kernel.
1345 */
1346 if (errno(*__errno_location ()) == EBUSY16) {
1347 RTE_LOG(DEBUG, EAL,rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping")
1348 " Memory segment is allready mapped,"rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping")
1349 " skipping")rte_log(8U, 0, "EAL" ": " " Memory segment is allready mapped,"
" skipping");
1350 } else {
1351 RTE_LOG(ERR, EAL,rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1352 " cannot set up DMA remapping,"rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1353 " error %i (%s)\n", errno,rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1354 strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot set up DMA remapping," " error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1355 return -1;
1356 }
1357 }
1358
1359 } else {
1360 ret = ioctl(vfio_container_fd,
1361 VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 18)) << 0) | ((0) << ((0 +8)+8))), &reg);
1362 if (ret) {
1363 RTE_LOG(ERR, EAL, " cannot unregister vaddr for IOMMU, error %i (%s)\n",rte_log(4U, 0, "EAL" ": " " cannot unregister vaddr for IOMMU, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1364 errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot unregister vaddr for IOMMU, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1365 return -1;
1366 }
1367
1368 memset(&dma_unmap, 0, sizeof(dma_unmap));
1369 dma_unmap.argsz = sizeof(struct vfio_iommu_type1_dma_unmap);
1370 dma_unmap.size = len;
1371 dma_unmap.iova = iova;
1372
1373 ret = ioctl(vfio_container_fd, VFIO_IOMMU_UNMAP_DMA(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 14)) << 0) | ((0) << ((0 +8)+8))),
1374 &dma_unmap);
1375 if (ret) {
1376 RTE_LOG(ERR, EAL, " cannot clear DMA remapping, error %i (%s)\n",rte_log(4U, 0, "EAL" ": " " cannot clear DMA remapping, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1377 errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot clear DMA remapping, error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1378 return -1;
1379 }
1380 }
1381
1382 return 0;
1383}
1384
1385static int
1386vfio_spapr_map_walk(const struct rte_memseg_list *msl,
1387 const struct rte_memseg *ms, void *arg)
1388{
1389 int *vfio_container_fd = arg;
1390
1391 if (msl->external)
1392 return 0;
1393
1394 return vfio_spapr_dma_do_map(*vfio_container_fd, ms->addr_64, ms->iova,
1395 ms->len, 1);
1396}
1397
1398struct spapr_walk_param {
1399 uint64_t window_size;
1400 uint64_t hugepage_sz;
1401};
1402static int
1403vfio_spapr_window_size_walk(const struct rte_memseg_list *msl,
1404 const struct rte_memseg *ms, void *arg)
1405{
1406 struct spapr_walk_param *param = arg;
1407 uint64_t max = ms->iova + ms->len;
1408
1409 if (msl->external)
1410 return 0;
1411
1412 if (max > param->window_size) {
1413 param->hugepage_sz = ms->hugepage_sz;
1414 param->window_size = max;
1415 }
1416
1417 return 0;
1418}
1419
1420static int
1421vfio_spapr_create_new_dma_window(int vfio_container_fd,
1422 struct vfio_iommu_spapr_tce_create *create) {
1423 struct vfio_iommu_spapr_tce_remove remove = {
1424 .argsz = sizeof(remove),
1425 };
1426 struct vfio_iommu_spapr_tce_info info = {
1427 .argsz = sizeof(info),
1428 };
1429 int ret;
1430
1431 /* query spapr iommu info */
1432 ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 12)) << 0) | ((0) << ((0 +8)+8))), &info);
1433 if (ret) {
1434 RTE_LOG(ERR, EAL, " cannot get iommu info, "rte_log(4U, 0, "EAL" ": " " cannot get iommu info, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1435 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot get iommu info, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1436 return -1;
1437 }
1438
1439 /* remove default DMA of 32 bit window */
1440 remove.start_addr = info.dma32_window_start;
1441 ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_REMOVE(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 20)) << 0) | ((0) << ((0 +8)+8))), &remove);
1442 if (ret) {
1443 RTE_LOG(ERR, EAL, " cannot remove default DMA window, "rte_log(4U, 0, "EAL" ": " " cannot remove default DMA window, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())))
1444 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot remove default DMA window, "
"error %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())));
1445 return -1;
1446 }
1447
1448 /* create new DMA window */
1449 ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_CREATE(((0U) << (((0 +8)+8)+14)) | ((((';'))) << (0 +8)
) | (((100 + 19)) << 0) | ((0) << ((0 +8)+8))), create);
1450 if (ret) {
1451 RTE_LOG(ERR, EAL, " cannot create new DMA window, "rte_log(4U, 0, "EAL" ": " " cannot create new DMA window, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1452 "error %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot create new DMA window, " "error %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1453 return -1;
1454 }
1455
1456 if (create->start_addr != 0) {
1457 RTE_LOG(ERR, EAL, " DMA window start address != 0\n")rte_log(4U, 0, "EAL" ": " " DMA window start address != 0\n"
);
1458 return -1;
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465vfio_spapr_dma_mem_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
1466 uint64_t len, int do_map)
1467{
1468 struct spapr_walk_param param;
1469 struct vfio_iommu_spapr_tce_create create = {
1470 .argsz = sizeof(create),
1471 };
1472 struct vfio_config *vfio_cfg;
1473 struct user_mem_maps *user_mem_maps;
1474 int i, ret = 0;
1475
1476 vfio_cfg = get_vfio_cfg_by_container_fd(vfio_container_fd);
1477 if (vfio_cfg == NULL((void*)0)) {
1478 RTE_LOG(ERR, EAL, " invalid container fd!\n")rte_log(4U, 0, "EAL" ": " " invalid container fd!\n");
1479 return -1;
1480 }
1481
1482 user_mem_maps = &vfio_cfg->mem_maps;
1483 rte_spinlock_recursive_lock(&user_mem_maps->lock);
1484
1485 /* check if window size needs to be adjusted */
1486 memset(&param, 0, sizeof(param));
1487
1488 /* we're inside a callback so use thread-unsafe version */
1489 if (rte_memseg_walk_thread_unsafe(vfio_spapr_window_size_walk,
1490 &param) < 0) {
1491 RTE_LOG(ERR, EAL, "Could not get window size\n")rte_log(4U, 0, "EAL" ": " "Could not get window size\n");
1492 ret = -1;
1493 goto out;
1494 }
1495
1496 /* also check user maps */
1497 for (i = 0; i < user_mem_maps->n_maps; i++) {
1498 uint64_t max = user_mem_maps->maps[i].iova +
1499 user_mem_maps->maps[i].len;
1500 create.window_size = RTE_MAX(create.window_size, max)__extension__ ({ __typeof__ (create.window_size) _a = (create
.window_size); __typeof__ (max) _b = (max); _a > _b ? _a :
_b; });
1501 }
1502
1503 /* sPAPR requires window size to be a power of 2 */
1504 create.window_size = rte_align64pow2(param.window_size);
1505 create.page_shift = __builtin_ctzll(param.hugepage_sz);
1506 create.levels = 1;
1507
1508 if (do_map) {
1509 void *addr;
1510 /* re-create window and remap the entire memory */
1511 if (iova > create.window_size) {
1512 if (vfio_spapr_create_new_dma_window(vfio_container_fd,
1513 &create) < 0) {
1514 RTE_LOG(ERR, EAL, "Could not create new DMA window\n")rte_log(4U, 0, "EAL" ": " "Could not create new DMA window\n"
);
1515 ret = -1;
1516 goto out;
1517 }
1518 /* we're inside a callback, so use thread-unsafe version
1519 */
1520 if (rte_memseg_walk_thread_unsafe(vfio_spapr_map_walk,
1521 &vfio_container_fd) < 0) {
1522 RTE_LOG(ERR, EAL, "Could not recreate DMA maps\n")rte_log(4U, 0, "EAL" ": " "Could not recreate DMA maps\n");
1523 ret = -1;
1524 goto out;
1525 }
1526 /* remap all user maps */
1527 for (i = 0; i < user_mem_maps->n_maps; i++) {
1528 struct user_mem_map *map =
1529 &user_mem_maps->maps[i];
1530 if (vfio_spapr_dma_do_map(vfio_container_fd,
1531 map->addr, map->iova, map->len,
1532 1)) {
1533 RTE_LOG(ERR, EAL, "Could not recreate user DMA maps\n")rte_log(4U, 0, "EAL" ": " "Could not recreate user DMA maps\n"
);
1534 ret = -1;
1535 goto out;
1536 }
1537 }
1538 }
1539
1540 /* now that we've remapped all of the memory that was present
1541 * before, map the segment that we were requested to map.
1542 *
1543 * however, if we were called by the callback, the memory we
1544 * were called with was already in the memseg list, so previous
1545 * mapping should've mapped that segment already.
1546 *
1547 * virt2memseg_list is a relatively cheap check, so use that. if
1548 * memory is within any memseg list, it's a memseg, so it's
1549 * already mapped.
1550 */
1551 addr = (void *)(uintptr_t)vaddr;
1552 if (rte_mem_virt2memseg_list(addr) == NULL((void*)0) &&
1553 vfio_spapr_dma_do_map(vfio_container_fd,
1554 vaddr, iova, len, 1) < 0) {
1555 RTE_LOG(ERR, EAL, "Could not map segment\n")rte_log(4U, 0, "EAL" ": " "Could not map segment\n");
1556 ret = -1;
1557 goto out;
1558 }
1559 } else {
1560 /* for unmap, check if iova within DMA window */
1561 if (iova > create.window_size) {
1562 RTE_LOG(ERR, EAL, "iova beyond DMA window for unmap")rte_log(4U, 0, "EAL" ": " "iova beyond DMA window for unmap");
1563 ret = -1;
1564 goto out;
1565 }
1566
1567 vfio_spapr_dma_do_map(vfio_container_fd, vaddr, iova, len, 0);
1568 }
1569out:
1570 rte_spinlock_recursive_unlock(&user_mem_maps->lock);
1571 return ret;
1572}
1573
1574static int
1575vfio_spapr_dma_map(int vfio_container_fd)
1576{
1577 struct vfio_iommu_spapr_tce_create create = {
1578 .argsz = sizeof(create),
1579 };
1580 struct spapr_walk_param param;
1581
1582 memset(&param, 0, sizeof(param));
1583
1584 /* create DMA window from 0 to max(phys_addr + len) */
1585 rte_memseg_walk(vfio_spapr_window_size_walk, &param);
1586
1587 /* sPAPR requires window size to be a power of 2 */
1588 create.window_size = rte_align64pow2(param.window_size);
1589 create.page_shift = __builtin_ctzll(param.hugepage_sz);
1590 create.levels = 1;
1591
1592 if (vfio_spapr_create_new_dma_window(vfio_container_fd, &create) < 0) {
1593 RTE_LOG(ERR, EAL, "Could not create new DMA window\n")rte_log(4U, 0, "EAL" ": " "Could not create new DMA window\n"
);
1594 return -1;
1595 }
1596
1597 /* map all DPDK segments for DMA. use 1:1 PA to IOVA mapping */
1598 if (rte_memseg_walk(vfio_spapr_map_walk, &vfio_container_fd) < 0)
1599 return -1;
1600
1601 return 0;
1602}
1603
1604static int
1605vfio_noiommu_dma_map(int __rte_unused__attribute__((__unused__)) vfio_container_fd)
1606{
1607 /* No-IOMMU mode does not need DMA mapping */
1608 return 0;
1609}
1610
1611static int
1612vfio_noiommu_dma_mem_map(int __rte_unused__attribute__((__unused__)) vfio_container_fd,
1613 uint64_t __rte_unused__attribute__((__unused__)) vaddr,
1614 uint64_t __rte_unused__attribute__((__unused__)) iova, uint64_t __rte_unused__attribute__((__unused__)) len,
1615 int __rte_unused__attribute__((__unused__)) do_map)
1616{
1617 /* No-IOMMU mode does not need DMA mapping */
1618 return 0;
1619}
1620
1621static int
1622vfio_dma_mem_map(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
1623 uint64_t len, int do_map)
1624{
1625 const struct vfio_iommu_type *t = vfio_cfg->vfio_iommu_type;
1626
1627 if (!t) {
1628 RTE_LOG(ERR, EAL, " VFIO support not initialized\n")rte_log(4U, 0, "EAL" ": " " VFIO support not initialized\n");
1629 rte_errno(per_lcore__rte_errno) = ENODEV19;
1630 return -1;
1631 }
1632
1633 if (!t->dma_user_map_func) {
1634 RTE_LOG(ERR, EAL,rte_log(4U, 0, "EAL" ": " " VFIO custom DMA region maping not supported by IOMMU %s\n"
, t->name)
1635 " VFIO custom DMA region maping not supported by IOMMU %s\n",rte_log(4U, 0, "EAL" ": " " VFIO custom DMA region maping not supported by IOMMU %s\n"
, t->name)
1636 t->name)rte_log(4U, 0, "EAL" ": " " VFIO custom DMA region maping not supported by IOMMU %s\n"
, t->name);
1637 rte_errno(per_lcore__rte_errno) = ENOTSUP95;
1638 return -1;
1639 }
1640
1641 return t->dma_user_map_func(vfio_cfg->vfio_container_fd, vaddr, iova,
1642 len, do_map);
1643}
1644
1645static int
1646container_dma_map(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
1647 uint64_t len)
1648{
1649 struct user_mem_map *new_map;
1650 struct user_mem_maps *user_mem_maps;
1651 int ret = 0;
1652
1653 user_mem_maps = &vfio_cfg->mem_maps;
1654 rte_spinlock_recursive_lock(&user_mem_maps->lock);
1655 if (user_mem_maps->n_maps == VFIO_MAX_USER_MEM_MAPS256) {
1656 RTE_LOG(ERR, EAL, "No more space for user mem maps\n")rte_log(4U, 0, "EAL" ": " "No more space for user mem maps\n"
);
1657 rte_errno(per_lcore__rte_errno) = ENOMEM12;
1658 ret = -1;
1659 goto out;
1660 }
1661 /* map the entry */
1662 if (vfio_dma_mem_map(vfio_cfg, vaddr, iova, len, 1)) {
1663 /* technically, this will fail if there are currently no devices
1664 * plugged in, even if a device were added later, this mapping
1665 * might have succeeded. however, since we cannot verify if this
1666 * is a valid mapping without having a device attached, consider
1667 * this to be unsupported, because we can't just store any old
1668 * mapping and pollute list of active mappings willy-nilly.
1669 */
1670 RTE_LOG(ERR, EAL, "Couldn't map new region for DMA\n")rte_log(4U, 0, "EAL" ": " "Couldn't map new region for DMA\n"
);
1671 ret = -1;
1672 goto out;
1673 }
1674 /* create new user mem map entry */
1675 new_map = &user_mem_maps->maps[user_mem_maps->n_maps++];
1676 new_map->addr = vaddr;
1677 new_map->iova = iova;
1678 new_map->len = len;
1679
1680 compact_user_maps(user_mem_maps);
1681out:
1682 rte_spinlock_recursive_unlock(&user_mem_maps->lock);
1683 return ret;
1684}
1685
1686static int
1687container_dma_unmap(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
1688 uint64_t len)
1689{
1690 struct user_mem_map *map, *new_map = NULL((void*)0);
1691 struct user_mem_maps *user_mem_maps;
1692 int ret = 0;
1693
1694 user_mem_maps = &vfio_cfg->mem_maps;
1695 rte_spinlock_recursive_lock(&user_mem_maps->lock);
1696
1697 /* find our mapping */
1698 map = find_user_mem_map(user_mem_maps, vaddr, iova, len);
1699 if (!map) {
1700 RTE_LOG(ERR, EAL, "Couldn't find previously mapped region\n")rte_log(4U, 0, "EAL" ": " "Couldn't find previously mapped region\n"
);
1701 rte_errno(per_lcore__rte_errno) = EINVAL22;
1702 ret = -1;
1703 goto out;
1704 }
1705 if (map->addr != vaddr || map->iova != iova || map->len != len) {
1706 /* we're partially unmapping a previously mapped region, so we
1707 * need to split entry into two.
1708 */
1709 if (user_mem_maps->n_maps == VFIO_MAX_USER_MEM_MAPS256) {
1710 RTE_LOG(ERR, EAL, "Not enough space to store partial mapping\n")rte_log(4U, 0, "EAL" ": " "Not enough space to store partial mapping\n"
);
1711 rte_errno(per_lcore__rte_errno) = ENOMEM12;
1712 ret = -1;
1713 goto out;
1714 }
1715 new_map = &user_mem_maps->maps[user_mem_maps->n_maps++];
1716 }
1717
1718 /* unmap the entry */
1719 if (vfio_dma_mem_map(vfio_cfg, vaddr, iova, len, 0)) {
1720 /* there may not be any devices plugged in, so unmapping will
1721 * fail with ENODEV/ENOTSUP rte_errno values, but that doesn't
1722 * stop us from removing the mapping, as the assumption is we
1723 * won't be needing this memory any more and thus will want to
1724 * prevent it from being remapped again on hotplug. so, only
1725 * fail if we indeed failed to unmap (e.g. if the mapping was
1726 * within our mapped range but had invalid alignment).
1727 */
1728 if (rte_errno(per_lcore__rte_errno) != ENODEV19 && rte_errno(per_lcore__rte_errno) != ENOTSUP95) {
1729 RTE_LOG(ERR, EAL, "Couldn't unmap region for DMA\n")rte_log(4U, 0, "EAL" ": " "Couldn't unmap region for DMA\n");
1730 ret = -1;
1731 goto out;
1732 } else {
1733 RTE_LOG(DEBUG, EAL, "DMA unmapping failed, but removing mappings anyway\n")rte_log(8U, 0, "EAL" ": " "DMA unmapping failed, but removing mappings anyway\n"
);
1734 }
1735 }
1736 /* remove map from the list of active mappings */
1737 if (new_map != NULL((void*)0)) {
1738 adjust_map(map, new_map, vaddr, len);
1739
1740 /* if we've created a new map by splitting, sort everything */
1741 if (!is_null_map(new_map)) {
1742 compact_user_maps(user_mem_maps);
1743 } else {
1744 /* we've created a new mapping, but it was unused */
1745 user_mem_maps->n_maps--;
1746 }
1747 } else {
1748 memset(map, 0, sizeof(*map));
1749 compact_user_maps(user_mem_maps);
1750 user_mem_maps->n_maps--;
1751 }
1752
1753out:
1754 rte_spinlock_recursive_unlock(&user_mem_maps->lock);
1755 return ret;
1756}
1757
1758int
1759rte_vfio_dma_map(uint64_t vaddr, uint64_t iova, uint64_t len)
1760{
1761 if (len == 0) {
1762 rte_errno(per_lcore__rte_errno) = EINVAL22;
1763 return -1;
1764 }
1765
1766 return container_dma_map(default_vfio_cfg, vaddr, iova, len);
1767}
1768
1769int
1770rte_vfio_dma_unmap(uint64_t vaddr, uint64_t iova, uint64_t len)
1771{
1772 if (len == 0) {
1773 rte_errno(per_lcore__rte_errno) = EINVAL22;
1774 return -1;
1775 }
1776
1777 return container_dma_unmap(default_vfio_cfg, vaddr, iova, len);
1778}
1779
1780int
1781rte_vfio_noiommu_is_enabled(void)
1782{
1783 int fd;
1784 ssize_t cnt;
1785 char c;
1786
1787 fd = open(VFIO_NOIOMMU_MODE"/sys/module/vfio/parameters/enable_unsafe_noiommu_mode", O_RDONLY00);
1788 if (fd < 0) {
1789 if (errno(*__errno_location ()) != ENOENT2) {
1790 RTE_LOG(ERR, EAL, " cannot open vfio noiommu file %i (%s)\n",rte_log(4U, 0, "EAL" ": " " cannot open vfio noiommu file %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())))
1791 errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " cannot open vfio noiommu file %i (%s)\n"
, (*__errno_location ()), strerror((*__errno_location ())));
1792 return -1;
1793 }
1794 /*
1795 * else the file does not exists
1796 * i.e. noiommu is not enabled
1797 */
1798 return 0;
1799 }
1800
1801 cnt = read(fd, &c, 1);
1802 close(fd);
1803 if (cnt != 1) {
1804 RTE_LOG(ERR, EAL, " unable to read from vfio noiommu "rte_log(4U, 0, "EAL" ": " " unable to read from vfio noiommu "
"file %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())))
1805 "file %i (%s)\n", errno, strerror(errno))rte_log(4U, 0, "EAL" ": " " unable to read from vfio noiommu "
"file %i (%s)\n", (*__errno_location ()), strerror((*__errno_location
())));
1806 return -1;
1807 }
1808
1809 return c == 'Y';
1810}
1811
1812int
1813rte_vfio_container_create(void)
1814{
1815 int i;
1816
1817 /* Find an empty slot to store new vfio config */
1818 for (i = 1; i < VFIO_MAX_CONTAINERS64; i++) {
1819 if (vfio_cfgs[i].vfio_container_fd == -1)
1820 break;
1821 }
1822
1823 if (i == VFIO_MAX_CONTAINERS64) {
1824 RTE_LOG(ERR, EAL, "exceed max vfio container limit\n")rte_log(4U, 0, "EAL" ": " "exceed max vfio container limit\n"
);
1825 return -1;
1826 }
1827
1828 vfio_cfgs[i].vfio_container_fd = rte_vfio_get_container_fd();
1829 if (vfio_cfgs[i].vfio_container_fd < 0) {
1830 RTE_LOG(NOTICE, EAL, "fail to create a new container\n")rte_log(6U, 0, "EAL" ": " "fail to create a new container\n");
1831 return -1;
1832 }
1833
1834 return vfio_cfgs[i].vfio_container_fd;
1835}
1836
1837int __rte_experimental__attribute__((section(".text.experimental")))
1838rte_vfio_container_destroy(int container_fd)
1839{
1840 struct vfio_config *vfio_cfg;
1841 int i;
1842
1843 vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
1844 if (vfio_cfg == NULL((void*)0)) {
1845 RTE_LOG(ERR, EAL, "Invalid container fd\n")rte_log(4U, 0, "EAL" ": " "Invalid container fd\n");
1846 return -1;
1847 }
1848
1849 for (i = 0; i < VFIO_MAX_GROUPS64; i++)
1850 if (vfio_cfg->vfio_groups[i].group_num != -1)
1851 rte_vfio_container_group_unbind(container_fd,
1852 vfio_cfg->vfio_groups[i].group_num);
1853
1854 close(container_fd);
1855 vfio_cfg->vfio_container_fd = -1;
1856 vfio_cfg->vfio_active_groups = 0;
1857 vfio_cfg->vfio_iommu_type = NULL((void*)0);
1858
1859 return 0;
1860}
1861
1862int
1863rte_vfio_container_group_bind(int container_fd, int iommu_group_num)
1864{
1865 struct vfio_config *vfio_cfg;
1866
1867 vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
1868 if (vfio_cfg == NULL((void*)0)) {
1869 RTE_LOG(ERR, EAL, "Invalid container fd\n")rte_log(4U, 0, "EAL" ": " "Invalid container fd\n");
1870 return -1;
1871 }
1872
1873 return vfio_get_group_fd(vfio_cfg, iommu_group_num);
1874}
1875
1876int
1877rte_vfio_container_group_unbind(int container_fd, int iommu_group_num)
1878{
1879 struct vfio_config *vfio_cfg;
1880 struct vfio_group *cur_grp = NULL((void*)0);
1881 int i;
1882
1883 vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
1884 if (vfio_cfg == NULL((void*)0)) {
1885 RTE_LOG(ERR, EAL, "Invalid container fd\n")rte_log(4U, 0, "EAL" ": " "Invalid container fd\n");
1886 return -1;
1887 }
1888
1889 for (i = 0; i < VFIO_MAX_GROUPS64; i++) {
1890 if (vfio_cfg->vfio_groups[i].group_num == iommu_group_num) {
1891 cur_grp = &vfio_cfg->vfio_groups[i];
1892 break;
1893 }
1894 }
1895
1896 /* This should not happen */
1897 if (i == VFIO_MAX_GROUPS64 || cur_grp == NULL((void*)0)) {
1898 RTE_LOG(ERR, EAL, "Specified group number not found\n")rte_log(4U, 0, "EAL" ": " "Specified group number not found\n"
);
1899 return -1;
1900 }
1901
1902 if (cur_grp->fd >= 0 && close(cur_grp->fd) < 0) {
1903 RTE_LOG(ERR, EAL, "Error when closing vfio_group_fd for"rte_log(4U, 0, "EAL" ": " "Error when closing vfio_group_fd for"
" iommu_group_num %d\n", iommu_group_num)
1904 " iommu_group_num %d\n", iommu_group_num)rte_log(4U, 0, "EAL" ": " "Error when closing vfio_group_fd for"
" iommu_group_num %d\n", iommu_group_num);
1905 return -1;
1906 }
1907 cur_grp->group_num = -1;
1908 cur_grp->fd = -1;
1909 cur_grp->devices = 0;
1910 vfio_cfg->vfio_active_groups--;
1911
1912 return 0;
1913}
1914
1915int
1916rte_vfio_container_dma_map(int container_fd, uint64_t vaddr, uint64_t iova,
1917 uint64_t len)
1918{
1919 struct vfio_config *vfio_cfg;
1920
1921 if (len == 0) {
1922 rte_errno(per_lcore__rte_errno) = EINVAL22;
1923 return -1;
1924 }
1925
1926 vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
1927 if (vfio_cfg == NULL((void*)0)) {
1928 RTE_LOG(ERR, EAL, "Invalid container fd\n")rte_log(4U, 0, "EAL" ": " "Invalid container fd\n");
1929 return -1;
1930 }
1931
1932 return container_dma_map(vfio_cfg, vaddr, iova, len);
1933}
1934
1935int
1936rte_vfio_container_dma_unmap(int container_fd, uint64_t vaddr, uint64_t iova,
1937 uint64_t len)
1938{
1939 struct vfio_config *vfio_cfg;
1940
1941 if (len == 0) {
1942 rte_errno(per_lcore__rte_errno) = EINVAL22;
1943 return -1;
1944 }
1945
1946 vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
1947 if (vfio_cfg == NULL((void*)0)) {
1948 RTE_LOG(ERR, EAL, "Invalid container fd\n")rte_log(4U, 0, "EAL" ": " "Invalid container fd\n");
1949 return -1;
1950 }
1951
1952 return container_dma_unmap(vfio_cfg, vaddr, iova, len);
1953}
1954
1955#else
1956
1957int
1958rte_vfio_dma_map(uint64_t __rte_unused__attribute__((__unused__)) vaddr, __rte_unused__attribute__((__unused__)) uint64_t iova,
1959 __rte_unused__attribute__((__unused__)) uint64_t len)
1960{
1961 return -1;
1962}
1963
1964int
1965rte_vfio_dma_unmap(uint64_t __rte_unused__attribute__((__unused__)) vaddr, uint64_t __rte_unused__attribute__((__unused__)) iova,
1966 __rte_unused__attribute__((__unused__)) uint64_t len)
1967{
1968 return -1;
1969}
1970
1971int
1972rte_vfio_setup_device(__rte_unused__attribute__((__unused__)) const char *sysfs_base,
1973 __rte_unused__attribute__((__unused__)) const char *dev_addr,
1974 __rte_unused__attribute__((__unused__)) int *vfio_dev_fd,
1975 __rte_unused__attribute__((__unused__)) struct vfio_device_info *device_info)
1976{
1977 return -1;
1978}
1979
1980int
1981rte_vfio_release_device(__rte_unused__attribute__((__unused__)) const char *sysfs_base,
1982 __rte_unused__attribute__((__unused__)) const char *dev_addr, __rte_unused__attribute__((__unused__)) int fd)
1983{
1984 return -1;
1985}
1986
1987int
1988rte_vfio_enable(__rte_unused__attribute__((__unused__)) const char *modname)
1989{
1990 return -1;
1991}
1992
1993int
1994rte_vfio_is_enabled(__rte_unused__attribute__((__unused__)) const char *modname)
1995{
1996 return -1;
1997}
1998
1999int
2000rte_vfio_noiommu_is_enabled(void)
2001{
2002 return -1;
2003}
2004
2005int
2006rte_vfio_clear_group(__rte_unused__attribute__((__unused__)) int vfio_group_fd)
2007{
2008 return -1;
2009}
2010
2011int
2012rte_vfio_get_group_num(__rte_unused__attribute__((__unused__)) const char *sysfs_base,
2013 __rte_unused__attribute__((__unused__)) const char *dev_addr,
2014 __rte_unused__attribute__((__unused__)) int *iommu_group_num)
2015{
2016 return -1;
2017}
2018
2019int
2020rte_vfio_get_container_fd(void)
2021{
2022 return -1;
2023}
2024
2025int
2026rte_vfio_get_group_fd(__rte_unused__attribute__((__unused__)) int iommu_group_num)
2027{
2028 return -1;
2029}
2030
2031int
2032rte_vfio_container_create(void)
2033{
2034 return -1;
2035}
2036
2037int
2038rte_vfio_container_destroy(__rte_unused__attribute__((__unused__)) int container_fd)
2039{
2040 return -1;
2041}
2042
2043int
2044rte_vfio_container_group_bind(__rte_unused__attribute__((__unused__)) int container_fd,
2045 __rte_unused__attribute__((__unused__)) int iommu_group_num)
2046{
2047 return -1;
2048}
2049
2050int
2051rte_vfio_container_group_unbind(__rte_unused__attribute__((__unused__)) int container_fd,
2052 __rte_unused__attribute__((__unused__)) int iommu_group_num)
2053{
2054 return -1;
2055}
2056
2057int
2058rte_vfio_container_dma_map(__rte_unused__attribute__((__unused__)) int container_fd,
2059 __rte_unused__attribute__((__unused__)) uint64_t vaddr,
2060 __rte_unused__attribute__((__unused__)) uint64_t iova,
2061 __rte_unused__attribute__((__unused__)) uint64_t len)
2062{
2063 return -1;
2064}
2065
2066int
2067rte_vfio_container_dma_unmap(__rte_unused__attribute__((__unused__)) int container_fd,
2068 __rte_unused__attribute__((__unused__)) uint64_t vaddr,
2069 __rte_unused__attribute__((__unused__)) uint64_t iova,
2070 __rte_unused__attribute__((__unused__)) uint64_t len)
2071{
2072 return -1;
2073}
2074
2075#endif /* VFIO_PRESENT */