Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause
2 : * Copyright (C) 2017 Intel Corporation.
3 : * All rights reserved.
4 : */
5 :
6 : #include "spdk/stdinc.h"
7 :
8 : #include "env_internal.h"
9 : #include "pci_dpdk.h"
10 :
11 : #include <rte_config.h>
12 : #include <rte_memory.h>
13 : #include <rte_eal_memconfig.h>
14 : #include <rte_dev.h>
15 : #include <rte_pci.h>
16 :
17 : #include "spdk_internal/assert.h"
18 :
19 : #include "spdk/assert.h"
20 : #include "spdk/likely.h"
21 : #include "spdk/queue.h"
22 : #include "spdk/util.h"
23 : #include "spdk/memory.h"
24 : #include "spdk/env_dpdk.h"
25 : #include "spdk/log.h"
26 :
27 : #ifdef __linux__
28 : #include <linux/version.h>
29 : #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
30 : #include <linux/vfio.h>
31 : #include <rte_vfio.h>
32 :
33 : struct spdk_vfio_dma_map {
34 : struct vfio_iommu_type1_dma_map map;
35 : TAILQ_ENTRY(spdk_vfio_dma_map) tailq;
36 : };
37 :
38 : struct vfio_cfg {
39 : int fd;
40 : bool enabled;
41 : bool noiommu_enabled;
42 : unsigned device_ref;
43 : TAILQ_HEAD(, spdk_vfio_dma_map) maps;
44 : pthread_mutex_t mutex;
45 : };
46 :
47 : static struct vfio_cfg g_vfio = {
48 : .fd = -1,
49 : .enabled = false,
50 : .noiommu_enabled = false,
51 : .device_ref = 0,
52 : .maps = TAILQ_HEAD_INITIALIZER(g_vfio.maps),
53 : .mutex = PTHREAD_MUTEX_INITIALIZER
54 : };
55 : #endif
56 : #endif
57 :
58 : #if DEBUG
59 : #define DEBUG_PRINT(...) SPDK_ERRLOG(__VA_ARGS__)
60 : #else
61 : #define DEBUG_PRINT(...)
62 : #endif
63 :
64 : #define FN_2MB_TO_4KB(fn) (fn << (SHIFT_2MB - SHIFT_4KB))
65 : #define FN_4KB_TO_2MB(fn) (fn >> (SHIFT_2MB - SHIFT_4KB))
66 :
67 : #define MAP_256TB_IDX(vfn_2mb) ((vfn_2mb) >> (SHIFT_1GB - SHIFT_2MB))
68 : #define MAP_1GB_IDX(vfn_2mb) ((vfn_2mb) & ((1ULL << (SHIFT_1GB - SHIFT_2MB)) - 1))
69 :
70 : /* Page is registered */
71 : #define REG_MAP_REGISTERED (1ULL << 62)
72 :
73 : /* A notification region barrier. The 2MB translation entry that's marked
74 : * with this flag must be unregistered separately. This allows contiguous
75 : * regions to be unregistered in the same chunks they were registered.
76 : */
77 : #define REG_MAP_NOTIFY_START (1ULL << 63)
78 :
79 : /* Translation of a single 2MB page. */
80 : struct map_2mb {
81 : uint64_t translation_2mb;
82 : };
83 :
84 : /* Second-level map table indexed by bits [21..29] of the virtual address.
85 : * Each entry contains the address translation or error for entries that haven't
86 : * been retrieved yet.
87 : */
88 : struct map_1gb {
89 : struct map_2mb map[1ULL << (SHIFT_1GB - SHIFT_2MB)];
90 : };
91 :
92 : /* Top-level map table indexed by bits [30..47] of the virtual address.
93 : * Each entry points to a second-level map table or NULL.
94 : */
95 : struct map_256tb {
96 : struct map_1gb *map[1ULL << (SHIFT_256TB - SHIFT_1GB)];
97 : };
98 :
99 : /* Page-granularity memory address translation */
100 : struct spdk_mem_map {
101 : struct map_256tb map_256tb;
102 : pthread_mutex_t mutex;
103 : uint64_t default_translation;
104 : struct spdk_mem_map_ops ops;
105 : void *cb_ctx;
106 : TAILQ_ENTRY(spdk_mem_map) tailq;
107 : };
108 :
109 : /* Registrations map. The 64 bit translations are bit fields with the
110 : * following layout (starting with the low bits):
111 : * 0 - 61 : reserved
112 : * 62 - 63 : flags
113 : */
114 : static struct spdk_mem_map *g_mem_reg_map;
115 : static TAILQ_HEAD(spdk_mem_map_head, spdk_mem_map) g_spdk_mem_maps =
116 : TAILQ_HEAD_INITIALIZER(g_spdk_mem_maps);
117 : static pthread_mutex_t g_spdk_mem_map_mutex = PTHREAD_MUTEX_INITIALIZER;
118 :
119 : static bool g_legacy_mem;
120 : static bool g_huge_pages = true;
121 :
122 : /*
123 : * Walk the currently registered memory via the main memory registration map
124 : * and call the new map's notify callback for each virtually contiguous region.
125 : */
126 : static int
127 0 : mem_map_notify_walk(struct spdk_mem_map *map, enum spdk_mem_map_notify_action action)
128 : {
129 : size_t idx_256tb;
130 : uint64_t idx_1gb;
131 0 : uint64_t contig_start = UINT64_MAX;
132 0 : uint64_t contig_end = UINT64_MAX;
133 : struct map_1gb *map_1gb;
134 : int rc;
135 :
136 0 : if (!g_mem_reg_map) {
137 0 : return -EINVAL;
138 : }
139 :
140 : /* Hold the memory registration map mutex so no new registrations can be added while we are looping. */
141 0 : pthread_mutex_lock(&g_mem_reg_map->mutex);
142 :
143 0 : for (idx_256tb = 0;
144 0 : idx_256tb < sizeof(g_mem_reg_map->map_256tb.map) / sizeof(g_mem_reg_map->map_256tb.map[0]);
145 0 : idx_256tb++) {
146 0 : map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
147 :
148 0 : if (!map_1gb) {
149 0 : if (contig_start != UINT64_MAX) {
150 : /* End of of a virtually contiguous range */
151 0 : rc = map->ops.notify_cb(map->cb_ctx, map, action,
152 0 : (void *)contig_start,
153 0 : contig_end - contig_start + VALUE_2MB);
154 : /* Don't bother handling unregister failures. It can't be any worse */
155 0 : if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
156 0 : goto err_unregister;
157 : }
158 0 : }
159 0 : contig_start = UINT64_MAX;
160 0 : continue;
161 : }
162 :
163 0 : for (idx_1gb = 0; idx_1gb < sizeof(map_1gb->map) / sizeof(map_1gb->map[0]); idx_1gb++) {
164 0 : if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
165 0 : (contig_start == UINT64_MAX ||
166 0 : (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
167 : /* Rebuild the virtual address from the indexes */
168 0 : uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
169 :
170 0 : if (contig_start == UINT64_MAX) {
171 0 : contig_start = vaddr;
172 0 : }
173 :
174 0 : contig_end = vaddr;
175 0 : } else {
176 0 : if (contig_start != UINT64_MAX) {
177 : /* End of of a virtually contiguous range */
178 0 : rc = map->ops.notify_cb(map->cb_ctx, map, action,
179 0 : (void *)contig_start,
180 0 : contig_end - contig_start + VALUE_2MB);
181 : /* Don't bother handling unregister failures. It can't be any worse */
182 0 : if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
183 0 : goto err_unregister;
184 : }
185 :
186 : /* This page might be a part of a neighbour region, so process
187 : * it again. The idx_1gb will be incremented immediately.
188 : */
189 0 : idx_1gb--;
190 0 : }
191 0 : contig_start = UINT64_MAX;
192 : }
193 0 : }
194 0 : }
195 :
196 0 : pthread_mutex_unlock(&g_mem_reg_map->mutex);
197 0 : return 0;
198 :
199 : err_unregister:
200 : /* Unwind to the first empty translation so we don't unregister
201 : * a region that just failed to register.
202 : */
203 0 : idx_256tb = MAP_256TB_IDX((contig_start >> SHIFT_2MB) - 1);
204 0 : idx_1gb = MAP_1GB_IDX((contig_start >> SHIFT_2MB) - 1);
205 0 : contig_start = UINT64_MAX;
206 0 : contig_end = UINT64_MAX;
207 :
208 : /* Unregister any memory we managed to register before the failure */
209 0 : for (; idx_256tb < SIZE_MAX; idx_256tb--) {
210 0 : map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
211 :
212 0 : if (!map_1gb) {
213 0 : if (contig_end != UINT64_MAX) {
214 : /* End of of a virtually contiguous range */
215 0 : map->ops.notify_cb(map->cb_ctx, map,
216 : SPDK_MEM_MAP_NOTIFY_UNREGISTER,
217 0 : (void *)contig_start,
218 0 : contig_end - contig_start + VALUE_2MB);
219 0 : }
220 0 : contig_end = UINT64_MAX;
221 0 : continue;
222 : }
223 :
224 0 : for (; idx_1gb < UINT64_MAX; idx_1gb--) {
225 : /* Rebuild the virtual address from the indexes */
226 0 : uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
227 0 : if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
228 0 : (contig_end == UINT64_MAX || (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
229 :
230 0 : if (contig_end == UINT64_MAX) {
231 0 : contig_end = vaddr;
232 0 : }
233 0 : contig_start = vaddr;
234 0 : } else {
235 0 : if (contig_end != UINT64_MAX) {
236 0 : if (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) {
237 0 : contig_start = vaddr;
238 0 : }
239 : /* End of of a virtually contiguous range */
240 0 : map->ops.notify_cb(map->cb_ctx, map,
241 : SPDK_MEM_MAP_NOTIFY_UNREGISTER,
242 0 : (void *)contig_start,
243 0 : contig_end - contig_start + VALUE_2MB);
244 0 : }
245 0 : contig_end = UINT64_MAX;
246 : }
247 0 : }
248 0 : idx_1gb = sizeof(map_1gb->map) / sizeof(map_1gb->map[0]) - 1;
249 0 : }
250 :
251 0 : pthread_mutex_unlock(&g_mem_reg_map->mutex);
252 0 : return rc;
253 0 : }
254 :
255 : struct spdk_mem_map *
256 0 : spdk_mem_map_alloc(uint64_t default_translation, const struct spdk_mem_map_ops *ops, void *cb_ctx)
257 : {
258 : struct spdk_mem_map *map;
259 : int rc;
260 : size_t i;
261 :
262 0 : map = calloc(1, sizeof(*map));
263 0 : if (map == NULL) {
264 0 : return NULL;
265 : }
266 :
267 0 : if (pthread_mutex_init(&map->mutex, NULL)) {
268 0 : free(map);
269 0 : return NULL;
270 : }
271 :
272 0 : map->default_translation = default_translation;
273 0 : map->cb_ctx = cb_ctx;
274 0 : if (ops) {
275 0 : map->ops = *ops;
276 0 : }
277 :
278 0 : if (ops && ops->notify_cb) {
279 0 : pthread_mutex_lock(&g_spdk_mem_map_mutex);
280 0 : rc = mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_REGISTER);
281 0 : if (rc != 0) {
282 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
283 0 : DEBUG_PRINT("Initial mem_map notify failed\n");
284 0 : pthread_mutex_destroy(&map->mutex);
285 0 : for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
286 0 : free(map->map_256tb.map[i]);
287 0 : }
288 0 : free(map);
289 0 : return NULL;
290 : }
291 0 : TAILQ_INSERT_TAIL(&g_spdk_mem_maps, map, tailq);
292 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
293 0 : }
294 :
295 0 : return map;
296 0 : }
297 :
298 : void
299 0 : spdk_mem_map_free(struct spdk_mem_map **pmap)
300 : {
301 : struct spdk_mem_map *map;
302 : size_t i;
303 :
304 0 : if (!pmap) {
305 0 : return;
306 : }
307 :
308 0 : map = *pmap;
309 :
310 0 : if (!map) {
311 0 : return;
312 : }
313 :
314 0 : if (map->ops.notify_cb) {
315 0 : pthread_mutex_lock(&g_spdk_mem_map_mutex);
316 0 : mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_UNREGISTER);
317 0 : TAILQ_REMOVE(&g_spdk_mem_maps, map, tailq);
318 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
319 0 : }
320 :
321 0 : for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
322 0 : free(map->map_256tb.map[i]);
323 0 : }
324 :
325 0 : pthread_mutex_destroy(&map->mutex);
326 :
327 0 : free(map);
328 0 : *pmap = NULL;
329 0 : }
330 :
331 : int
332 0 : spdk_mem_register(void *_vaddr, size_t len)
333 : {
334 : struct spdk_mem_map *map;
335 : int rc;
336 0 : uint64_t vaddr = (uintptr_t)_vaddr;
337 : uint64_t seg_vaddr;
338 : size_t seg_len;
339 : uint64_t reg;
340 :
341 0 : if ((uintptr_t)vaddr & ~MASK_256TB) {
342 0 : DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
343 0 : return -EINVAL;
344 : }
345 :
346 0 : if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
347 0 : DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
348 : __func__, vaddr, len);
349 0 : return -EINVAL;
350 : }
351 :
352 0 : if (len == 0) {
353 0 : return 0;
354 : }
355 :
356 0 : pthread_mutex_lock(&g_spdk_mem_map_mutex);
357 :
358 0 : seg_vaddr = vaddr;
359 0 : seg_len = len;
360 0 : while (seg_len > 0) {
361 0 : reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
362 0 : if (reg & REG_MAP_REGISTERED) {
363 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
364 0 : return -EBUSY;
365 : }
366 0 : seg_vaddr += VALUE_2MB;
367 0 : seg_len -= VALUE_2MB;
368 : }
369 :
370 0 : seg_vaddr = vaddr;
371 0 : seg_len = 0;
372 0 : while (len > 0) {
373 0 : spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB,
374 0 : seg_len == 0 ? REG_MAP_REGISTERED | REG_MAP_NOTIFY_START : REG_MAP_REGISTERED);
375 0 : seg_len += VALUE_2MB;
376 0 : vaddr += VALUE_2MB;
377 0 : len -= VALUE_2MB;
378 : }
379 :
380 0 : TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
381 0 : rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER,
382 0 : (void *)seg_vaddr, seg_len);
383 0 : if (rc != 0) {
384 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
385 0 : return rc;
386 : }
387 0 : }
388 :
389 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
390 0 : return 0;
391 0 : }
392 :
393 : int
394 0 : spdk_mem_unregister(void *_vaddr, size_t len)
395 : {
396 : struct spdk_mem_map *map;
397 : int rc;
398 0 : uint64_t vaddr = (uintptr_t)_vaddr;
399 : uint64_t seg_vaddr;
400 : size_t seg_len;
401 : uint64_t reg, newreg;
402 :
403 0 : if ((uintptr_t)vaddr & ~MASK_256TB) {
404 0 : DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
405 0 : return -EINVAL;
406 : }
407 :
408 0 : if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
409 0 : DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
410 : __func__, vaddr, len);
411 0 : return -EINVAL;
412 : }
413 :
414 0 : pthread_mutex_lock(&g_spdk_mem_map_mutex);
415 :
416 : /* The first page must be a start of a region. Also check if it's
417 : * registered to make sure we don't return -ERANGE for non-registered
418 : * regions.
419 : */
420 0 : reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
421 0 : if ((reg & REG_MAP_REGISTERED) && (reg & REG_MAP_NOTIFY_START) == 0) {
422 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
423 0 : return -ERANGE;
424 : }
425 :
426 0 : seg_vaddr = vaddr;
427 0 : seg_len = len;
428 0 : while (seg_len > 0) {
429 0 : reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
430 0 : if ((reg & REG_MAP_REGISTERED) == 0) {
431 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
432 0 : return -EINVAL;
433 : }
434 0 : seg_vaddr += VALUE_2MB;
435 0 : seg_len -= VALUE_2MB;
436 : }
437 :
438 0 : newreg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
439 : /* If the next page is registered, it must be a start of a region as well,
440 : * otherwise we'd be unregistering only a part of a region.
441 : */
442 0 : if ((newreg & REG_MAP_NOTIFY_START) == 0 && (newreg & REG_MAP_REGISTERED)) {
443 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
444 0 : return -ERANGE;
445 : }
446 0 : seg_vaddr = vaddr;
447 0 : seg_len = 0;
448 :
449 0 : while (len > 0) {
450 0 : reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
451 0 : spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB, 0);
452 :
453 0 : if (seg_len > 0 && (reg & REG_MAP_NOTIFY_START)) {
454 0 : TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
455 0 : rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
456 0 : (void *)seg_vaddr, seg_len);
457 0 : if (rc != 0) {
458 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
459 0 : return rc;
460 : }
461 0 : }
462 :
463 0 : seg_vaddr = vaddr;
464 0 : seg_len = VALUE_2MB;
465 0 : } else {
466 0 : seg_len += VALUE_2MB;
467 : }
468 :
469 0 : vaddr += VALUE_2MB;
470 0 : len -= VALUE_2MB;
471 : }
472 :
473 0 : if (seg_len > 0) {
474 0 : TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
475 0 : rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
476 0 : (void *)seg_vaddr, seg_len);
477 0 : if (rc != 0) {
478 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
479 0 : return rc;
480 : }
481 0 : }
482 0 : }
483 :
484 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
485 0 : return 0;
486 0 : }
487 :
488 : int
489 0 : spdk_mem_reserve(void *vaddr, size_t len)
490 : {
491 : struct spdk_mem_map *map;
492 : void *seg_vaddr;
493 : size_t seg_len;
494 : uint64_t reg;
495 :
496 0 : if ((uintptr_t)vaddr & ~MASK_256TB) {
497 0 : DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
498 0 : return -EINVAL;
499 : }
500 :
501 0 : if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
502 0 : DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
503 : __func__, vaddr, len);
504 0 : return -EINVAL;
505 : }
506 :
507 0 : if (len == 0) {
508 0 : return 0;
509 : }
510 :
511 0 : pthread_mutex_lock(&g_spdk_mem_map_mutex);
512 :
513 : /* Check if any part of this range is already registered */
514 0 : seg_vaddr = vaddr;
515 0 : seg_len = len;
516 0 : while (seg_len > 0) {
517 0 : reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
518 0 : if (reg & REG_MAP_REGISTERED) {
519 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
520 0 : return -EBUSY;
521 : }
522 0 : seg_vaddr += VALUE_2MB;
523 0 : seg_len -= VALUE_2MB;
524 : }
525 :
526 : /* Simply set the translation to the memory map's default. This allocates the space in the
527 : * map but does not provide a valid translation. */
528 0 : spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, len,
529 0 : g_mem_reg_map->default_translation);
530 :
531 0 : TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
532 0 : spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, map->default_translation);
533 0 : }
534 :
535 0 : pthread_mutex_unlock(&g_spdk_mem_map_mutex);
536 0 : return 0;
537 0 : }
538 :
539 : static struct map_1gb *
540 0 : mem_map_get_map_1gb(struct spdk_mem_map *map, uint64_t vfn_2mb)
541 : {
542 : struct map_1gb *map_1gb;
543 0 : uint64_t idx_256tb = MAP_256TB_IDX(vfn_2mb);
544 : size_t i;
545 :
546 0 : if (spdk_unlikely(idx_256tb >= SPDK_COUNTOF(map->map_256tb.map))) {
547 0 : return NULL;
548 : }
549 :
550 0 : map_1gb = map->map_256tb.map[idx_256tb];
551 :
552 0 : if (!map_1gb) {
553 0 : pthread_mutex_lock(&map->mutex);
554 :
555 : /* Recheck to make sure nobody else got the mutex first. */
556 0 : map_1gb = map->map_256tb.map[idx_256tb];
557 0 : if (!map_1gb) {
558 0 : map_1gb = malloc(sizeof(struct map_1gb));
559 0 : if (map_1gb) {
560 : /* initialize all entries to default translation */
561 0 : for (i = 0; i < SPDK_COUNTOF(map_1gb->map); i++) {
562 0 : map_1gb->map[i].translation_2mb = map->default_translation;
563 0 : }
564 0 : map->map_256tb.map[idx_256tb] = map_1gb;
565 0 : }
566 0 : }
567 :
568 0 : pthread_mutex_unlock(&map->mutex);
569 :
570 0 : if (!map_1gb) {
571 0 : DEBUG_PRINT("allocation failed\n");
572 0 : return NULL;
573 : }
574 0 : }
575 :
576 0 : return map_1gb;
577 0 : }
578 :
579 : int
580 0 : spdk_mem_map_set_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size,
581 : uint64_t translation)
582 : {
583 : uint64_t vfn_2mb;
584 : struct map_1gb *map_1gb;
585 : uint64_t idx_1gb;
586 : struct map_2mb *map_2mb;
587 :
588 0 : if ((uintptr_t)vaddr & ~MASK_256TB) {
589 0 : DEBUG_PRINT("invalid usermode virtual address %" PRIu64 "\n", vaddr);
590 0 : return -EINVAL;
591 : }
592 :
593 : /* For now, only 2 MB-aligned registrations are supported */
594 0 : if (((uintptr_t)vaddr & MASK_2MB) || (size & MASK_2MB)) {
595 0 : DEBUG_PRINT("invalid %s parameters, vaddr=%" PRIu64 " len=%" PRIu64 "\n",
596 : __func__, vaddr, size);
597 0 : return -EINVAL;
598 : }
599 :
600 0 : vfn_2mb = vaddr >> SHIFT_2MB;
601 :
602 0 : while (size) {
603 0 : map_1gb = mem_map_get_map_1gb(map, vfn_2mb);
604 0 : if (!map_1gb) {
605 0 : DEBUG_PRINT("could not get %p map\n", (void *)vaddr);
606 0 : return -ENOMEM;
607 : }
608 :
609 0 : idx_1gb = MAP_1GB_IDX(vfn_2mb);
610 0 : map_2mb = &map_1gb->map[idx_1gb];
611 0 : map_2mb->translation_2mb = translation;
612 :
613 0 : size -= VALUE_2MB;
614 0 : vfn_2mb++;
615 : }
616 :
617 0 : return 0;
618 0 : }
619 :
620 : int
621 0 : spdk_mem_map_clear_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size)
622 : {
623 0 : return spdk_mem_map_set_translation(map, vaddr, size, map->default_translation);
624 : }
625 :
626 : inline uint64_t
627 0 : spdk_mem_map_translate(const struct spdk_mem_map *map, uint64_t vaddr, uint64_t *size)
628 : {
629 : const struct map_1gb *map_1gb;
630 : const struct map_2mb *map_2mb;
631 : uint64_t idx_256tb;
632 : uint64_t idx_1gb;
633 : uint64_t vfn_2mb;
634 : uint64_t cur_size;
635 : uint64_t prev_translation;
636 : uint64_t orig_translation;
637 :
638 0 : if (spdk_unlikely(vaddr & ~MASK_256TB)) {
639 0 : DEBUG_PRINT("invalid usermode virtual address %p\n", (void *)vaddr);
640 0 : return map->default_translation;
641 : }
642 :
643 0 : vfn_2mb = vaddr >> SHIFT_2MB;
644 0 : idx_256tb = MAP_256TB_IDX(vfn_2mb);
645 0 : idx_1gb = MAP_1GB_IDX(vfn_2mb);
646 :
647 0 : map_1gb = map->map_256tb.map[idx_256tb];
648 0 : if (spdk_unlikely(!map_1gb)) {
649 0 : return map->default_translation;
650 : }
651 :
652 0 : cur_size = VALUE_2MB - _2MB_OFFSET(vaddr);
653 0 : map_2mb = &map_1gb->map[idx_1gb];
654 0 : if (size == NULL || map->ops.are_contiguous == NULL ||
655 0 : map_2mb->translation_2mb == map->default_translation) {
656 0 : if (size != NULL) {
657 0 : *size = spdk_min(*size, cur_size);
658 0 : }
659 0 : return map_2mb->translation_2mb;
660 : }
661 :
662 0 : orig_translation = map_2mb->translation_2mb;
663 0 : prev_translation = orig_translation;
664 0 : while (cur_size < *size) {
665 0 : vfn_2mb++;
666 0 : idx_256tb = MAP_256TB_IDX(vfn_2mb);
667 0 : idx_1gb = MAP_1GB_IDX(vfn_2mb);
668 :
669 0 : map_1gb = map->map_256tb.map[idx_256tb];
670 0 : if (spdk_unlikely(!map_1gb)) {
671 0 : break;
672 : }
673 :
674 0 : map_2mb = &map_1gb->map[idx_1gb];
675 0 : if (!map->ops.are_contiguous(prev_translation, map_2mb->translation_2mb)) {
676 0 : break;
677 : }
678 :
679 0 : cur_size += VALUE_2MB;
680 0 : prev_translation = map_2mb->translation_2mb;
681 : }
682 :
683 0 : *size = spdk_min(*size, cur_size);
684 0 : return orig_translation;
685 0 : }
686 :
687 : static void
688 0 : memory_hotplug_cb(enum rte_mem_event event_type,
689 : const void *addr, size_t len, void *arg)
690 : {
691 0 : if (event_type == RTE_MEM_EVENT_ALLOC) {
692 0 : spdk_mem_register((void *)addr, len);
693 :
694 0 : if (!spdk_env_dpdk_external_init()) {
695 0 : return;
696 : }
697 :
698 : /* When the user initialized DPDK separately, we can't
699 : * be sure that --match-allocations RTE flag was specified.
700 : * Without this flag, DPDK can free memory in different units
701 : * than it was allocated. It doesn't work with things like RDMA MRs.
702 : *
703 : * For such cases, we mark segments so they aren't freed.
704 : */
705 0 : while (len > 0) {
706 : struct rte_memseg *seg;
707 :
708 0 : seg = rte_mem_virt2memseg(addr, NULL);
709 0 : assert(seg != NULL);
710 0 : seg->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
711 0 : addr = (void *)((uintptr_t)addr + seg->hugepage_sz);
712 0 : len -= seg->hugepage_sz;
713 : }
714 0 : } else if (event_type == RTE_MEM_EVENT_FREE) {
715 0 : spdk_mem_unregister((void *)addr, len);
716 0 : }
717 0 : }
718 :
719 : static int
720 0 : memory_iter_cb(const struct rte_memseg_list *msl,
721 : const struct rte_memseg *ms, size_t len, void *arg)
722 : {
723 0 : return spdk_mem_register(ms->addr, len);
724 : }
725 :
726 : static bool g_mem_event_cb_registered = false;
727 :
728 : static int
729 0 : mem_map_mem_event_callback_register(void)
730 : {
731 : int rc;
732 :
733 0 : rc = rte_mem_event_callback_register("spdk", memory_hotplug_cb, NULL);
734 0 : if (rc != 0) {
735 0 : DEBUG_PRINT("memory event callback registration failed, rc = %d\n", rc);
736 0 : return -errno;
737 : }
738 :
739 0 : g_mem_event_cb_registered = true;
740 0 : return 0;
741 0 : }
742 :
743 : static void
744 0 : mem_map_mem_event_callback_unregister(void)
745 : {
746 0 : if (g_mem_event_cb_registered) {
747 0 : g_mem_event_cb_registered = false;
748 0 : rte_mem_event_callback_unregister("spdk", NULL);
749 0 : }
750 0 : }
751 :
752 : int
753 0 : mem_map_init(bool legacy_mem)
754 : {
755 : int rc;
756 :
757 0 : g_legacy_mem = legacy_mem;
758 :
759 0 : g_mem_reg_map = spdk_mem_map_alloc(0, NULL, NULL);
760 0 : if (g_mem_reg_map == NULL) {
761 0 : DEBUG_PRINT("memory registration map allocation failed\n");
762 0 : return -ENOMEM;
763 : }
764 :
765 0 : if (!g_huge_pages) {
766 0 : return 0;
767 : }
768 :
769 0 : if (!g_legacy_mem) {
770 : /**
771 : * To prevent DPDK complaining, only register the callback when
772 : * we are not in legacy mem mode.
773 : */
774 0 : rc = mem_map_mem_event_callback_register();
775 0 : if (rc != 0) {
776 0 : DEBUG_PRINT("memory event callback registration failed, rc = %d\n", rc);
777 0 : goto err_free_reg_map;
778 : }
779 0 : }
780 :
781 : /*
782 : * Walk all DPDK memory segments and register them
783 : * with the main memory map
784 : */
785 0 : rc = rte_memseg_contig_walk(memory_iter_cb, NULL);
786 0 : if (rc != 0) {
787 0 : DEBUG_PRINT("memory segments walking failed, rc = %d\n", rc);
788 0 : goto err_unregister_mem_cb;
789 : }
790 :
791 0 : return 0;
792 :
793 : err_unregister_mem_cb:
794 0 : mem_map_mem_event_callback_unregister();
795 : err_free_reg_map:
796 0 : spdk_mem_map_free(&g_mem_reg_map);
797 0 : return rc;
798 0 : }
799 :
800 : bool
801 0 : spdk_iommu_is_enabled(void)
802 : {
803 : #if VFIO_ENABLED
804 : return g_vfio.enabled && !g_vfio.noiommu_enabled;
805 : #else
806 0 : return false;
807 : #endif
808 : }
809 :
810 : struct spdk_vtophys_pci_device {
811 : struct rte_pci_device *pci_device;
812 : TAILQ_ENTRY(spdk_vtophys_pci_device) tailq;
813 : };
814 :
815 : static pthread_mutex_t g_vtophys_pci_devices_mutex = PTHREAD_MUTEX_INITIALIZER;
816 : static TAILQ_HEAD(, spdk_vtophys_pci_device) g_vtophys_pci_devices =
817 : TAILQ_HEAD_INITIALIZER(g_vtophys_pci_devices);
818 :
819 : static struct spdk_mem_map *g_vtophys_map;
820 : static struct spdk_mem_map *g_phys_ref_map;
821 : static struct spdk_mem_map *g_numa_map;
822 :
823 : #if VFIO_ENABLED
824 : static int
825 : _vfio_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
826 : {
827 : struct spdk_vfio_dma_map *dma_map;
828 : int ret;
829 :
830 : dma_map = calloc(1, sizeof(*dma_map));
831 : if (dma_map == NULL) {
832 : return -ENOMEM;
833 : }
834 :
835 : dma_map->map.argsz = sizeof(dma_map->map);
836 : dma_map->map.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
837 : dma_map->map.vaddr = vaddr;
838 : dma_map->map.iova = iova;
839 : dma_map->map.size = size;
840 :
841 : if (g_vfio.device_ref == 0) {
842 : /* VFIO requires at least one device (IOMMU group) to be added to
843 : * a VFIO container before it is possible to perform any IOMMU
844 : * operations on that container. This memory will be mapped once
845 : * the first device (IOMMU group) is hotplugged.
846 : *
847 : * Since the vfio container is managed internally by DPDK, it is
848 : * also possible that some device is already in that container, but
849 : * it's not managed by SPDK - e.g. an NIC attached internally
850 : * inside DPDK. We could map the memory straight away in such
851 : * scenario, but there's no need to do it. DPDK devices clearly
852 : * don't need our mappings and hence we defer the mapping
853 : * unconditionally until the first SPDK-managed device is
854 : * hotplugged.
855 : */
856 : goto out_insert;
857 : }
858 :
859 : ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
860 : if (ret) {
861 : /* There are cases the vfio container doesn't have IOMMU group, it's safe for this case */
862 : SPDK_NOTICELOG("Cannot set up DMA mapping, error %d, ignored\n", errno);
863 : }
864 :
865 : out_insert:
866 : TAILQ_INSERT_TAIL(&g_vfio.maps, dma_map, tailq);
867 : return 0;
868 : }
869 :
870 :
871 : static int
872 : vtophys_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
873 : {
874 : uint64_t refcount;
875 : int ret;
876 :
877 : refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
878 : assert(refcount < UINT64_MAX);
879 : if (refcount > 0) {
880 : spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
881 : return 0;
882 : }
883 :
884 : pthread_mutex_lock(&g_vfio.mutex);
885 : ret = _vfio_iommu_map_dma(vaddr, iova, size);
886 : pthread_mutex_unlock(&g_vfio.mutex);
887 : if (ret) {
888 : return ret;
889 : }
890 :
891 : spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
892 : return 0;
893 : }
894 :
895 : int
896 : vtophys_iommu_map_dma_bar(uint64_t vaddr, uint64_t iova, uint64_t size)
897 : {
898 : int ret;
899 :
900 : pthread_mutex_lock(&g_vfio.mutex);
901 : ret = _vfio_iommu_map_dma(vaddr, iova, size);
902 : pthread_mutex_unlock(&g_vfio.mutex);
903 :
904 : return ret;
905 : }
906 :
907 : static int
908 : _vfio_iommu_unmap_dma(struct spdk_vfio_dma_map *dma_map)
909 : {
910 : struct vfio_iommu_type1_dma_unmap unmap = {};
911 : int ret;
912 :
913 : if (g_vfio.device_ref == 0) {
914 : /* Memory is not mapped anymore, just remove it's references */
915 : goto out_remove;
916 : }
917 :
918 : unmap.argsz = sizeof(unmap);
919 : unmap.flags = 0;
920 : unmap.iova = dma_map->map.iova;
921 : unmap.size = dma_map->map.size;
922 : ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
923 : if (ret) {
924 : SPDK_NOTICELOG("Cannot clear DMA mapping, error %d, ignored\n", errno);
925 : }
926 :
927 : out_remove:
928 : TAILQ_REMOVE(&g_vfio.maps, dma_map, tailq);
929 : free(dma_map);
930 : return 0;
931 : }
932 :
933 : static int
934 : vtophys_iommu_unmap_dma(uint64_t iova, uint64_t size)
935 : {
936 : struct spdk_vfio_dma_map *dma_map;
937 : uint64_t refcount;
938 : int ret;
939 :
940 : pthread_mutex_lock(&g_vfio.mutex);
941 : TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
942 : if (dma_map->map.iova == iova) {
943 : break;
944 : }
945 : }
946 :
947 : if (dma_map == NULL) {
948 : DEBUG_PRINT("Cannot clear DMA mapping for IOVA %"PRIx64" - it's not mapped\n", iova);
949 : pthread_mutex_unlock(&g_vfio.mutex);
950 : return -ENXIO;
951 : }
952 :
953 : refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
954 : assert(refcount < UINT64_MAX);
955 : if (refcount > 0) {
956 : spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount - 1);
957 : }
958 :
959 : /* We still have outstanding references, don't clear it. */
960 : if (refcount > 1) {
961 : pthread_mutex_unlock(&g_vfio.mutex);
962 : return 0;
963 : }
964 :
965 : /** don't support partial or multiple-page unmap for now */
966 : assert(dma_map->map.size == size);
967 :
968 : ret = _vfio_iommu_unmap_dma(dma_map);
969 : pthread_mutex_unlock(&g_vfio.mutex);
970 :
971 : return ret;
972 : }
973 :
974 : int
975 : vtophys_iommu_unmap_dma_bar(uint64_t vaddr)
976 : {
977 : struct spdk_vfio_dma_map *dma_map;
978 : int ret;
979 :
980 : pthread_mutex_lock(&g_vfio.mutex);
981 : TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
982 : if (dma_map->map.vaddr == vaddr) {
983 : break;
984 : }
985 : }
986 :
987 : if (dma_map == NULL) {
988 : DEBUG_PRINT("Cannot clear DMA mapping for address %"PRIx64" - it's not mapped\n", vaddr);
989 : pthread_mutex_unlock(&g_vfio.mutex);
990 : return -ENXIO;
991 : }
992 :
993 : ret = _vfio_iommu_unmap_dma(dma_map);
994 : pthread_mutex_unlock(&g_vfio.mutex);
995 : return ret;
996 : }
997 : #endif
998 :
999 : static uint64_t
1000 0 : vtophys_get_paddr_memseg(uint64_t vaddr)
1001 : {
1002 : uintptr_t paddr;
1003 : struct rte_memseg *seg;
1004 :
1005 0 : seg = rte_mem_virt2memseg((void *)(uintptr_t)vaddr, NULL);
1006 0 : if (seg != NULL) {
1007 0 : paddr = seg->iova;
1008 0 : if (paddr == RTE_BAD_IOVA) {
1009 0 : return SPDK_VTOPHYS_ERROR;
1010 : }
1011 0 : paddr += (vaddr - (uintptr_t)seg->addr);
1012 0 : return paddr;
1013 : }
1014 :
1015 0 : return SPDK_VTOPHYS_ERROR;
1016 0 : }
1017 :
1018 : /* Try to get the paddr from /proc/self/pagemap */
1019 : static uint64_t
1020 0 : vtophys_get_paddr_pagemap(uint64_t vaddr)
1021 : {
1022 : uintptr_t paddr;
1023 :
1024 : /* Silence static analyzers */
1025 0 : assert(vaddr != 0);
1026 0 : paddr = rte_mem_virt2iova((void *)vaddr);
1027 0 : if (paddr == RTE_BAD_IOVA) {
1028 : /*
1029 : * The vaddr may be valid but doesn't have a backing page
1030 : * assigned yet. Touch the page to ensure a backing page
1031 : * gets assigned, then try to translate again.
1032 : */
1033 0 : rte_atomic64_read((rte_atomic64_t *)vaddr);
1034 0 : paddr = rte_mem_virt2iova((void *)vaddr);
1035 0 : }
1036 0 : if (paddr == RTE_BAD_IOVA) {
1037 : /* Unable to get to the physical address. */
1038 0 : return SPDK_VTOPHYS_ERROR;
1039 : }
1040 :
1041 0 : return paddr;
1042 0 : }
1043 :
1044 : static uint64_t
1045 0 : pci_device_vtophys(struct rte_pci_device *dev, uint64_t vaddr, size_t len)
1046 : {
1047 : struct rte_mem_resource *res;
1048 : uint64_t paddr;
1049 : unsigned r;
1050 :
1051 0 : for (r = 0; r < PCI_MAX_RESOURCE; r++) {
1052 0 : res = dpdk_pci_device_get_mem_resource(dev, r);
1053 :
1054 0 : if (res->phys_addr == 0 || vaddr < (uint64_t)res->addr ||
1055 0 : (vaddr + len) >= (uint64_t)res->addr + res->len) {
1056 0 : continue;
1057 : }
1058 :
1059 : #if VFIO_ENABLED
1060 : if (spdk_iommu_is_enabled() && rte_eal_iova_mode() == RTE_IOVA_VA) {
1061 : /*
1062 : * The IOMMU is on and we're using IOVA == VA. The BAR was
1063 : * automatically registered when it was mapped, so just return
1064 : * the virtual address here.
1065 : */
1066 : return vaddr;
1067 : }
1068 : #endif
1069 0 : paddr = res->phys_addr + (vaddr - (uint64_t)res->addr);
1070 0 : return paddr;
1071 : }
1072 :
1073 0 : return SPDK_VTOPHYS_ERROR;
1074 0 : }
1075 :
1076 : /* Try to get the paddr from pci devices */
1077 : static uint64_t
1078 0 : vtophys_get_paddr_pci(uint64_t vaddr, size_t len)
1079 : {
1080 : struct spdk_vtophys_pci_device *vtophys_dev;
1081 : uintptr_t paddr;
1082 : struct rte_pci_device *dev;
1083 :
1084 0 : pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
1085 0 : TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
1086 0 : dev = vtophys_dev->pci_device;
1087 0 : paddr = pci_device_vtophys(dev, vaddr, len);
1088 0 : if (paddr != SPDK_VTOPHYS_ERROR) {
1089 0 : pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
1090 0 : return paddr;
1091 : }
1092 0 : }
1093 0 : pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
1094 :
1095 0 : return SPDK_VTOPHYS_ERROR;
1096 0 : }
1097 :
1098 : static int
1099 0 : vtophys_notify(void *cb_ctx, struct spdk_mem_map *map,
1100 : enum spdk_mem_map_notify_action action,
1101 : void *vaddr, size_t len)
1102 : {
1103 0 : int rc = 0;
1104 : uint64_t paddr;
1105 :
1106 0 : if ((uintptr_t)vaddr & ~MASK_256TB) {
1107 0 : DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
1108 0 : return -EINVAL;
1109 : }
1110 :
1111 0 : if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
1112 0 : DEBUG_PRINT("invalid parameters, vaddr=%p len=%ju\n",
1113 : vaddr, len);
1114 0 : return -EINVAL;
1115 : }
1116 :
1117 : /* Get the physical address from the DPDK memsegs */
1118 0 : paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
1119 :
1120 0 : switch (action) {
1121 : case SPDK_MEM_MAP_NOTIFY_REGISTER:
1122 0 : if (paddr == SPDK_VTOPHYS_ERROR) {
1123 : /* This is not an address that DPDK is managing. */
1124 :
1125 : /* Check if this is a PCI BAR. They need special handling */
1126 0 : paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
1127 0 : if (paddr != SPDK_VTOPHYS_ERROR) {
1128 : /* Get paddr for each 2MB chunk in this address range */
1129 0 : while (len > 0) {
1130 0 : paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
1131 0 : if (paddr == SPDK_VTOPHYS_ERROR) {
1132 0 : DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
1133 0 : return -EFAULT;
1134 : }
1135 :
1136 0 : rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
1137 0 : if (rc != 0) {
1138 0 : return rc;
1139 : }
1140 :
1141 0 : vaddr += VALUE_2MB;
1142 0 : len -= VALUE_2MB;
1143 : }
1144 :
1145 0 : return 0;
1146 : }
1147 :
1148 : #if VFIO_ENABLED
1149 : enum rte_iova_mode iova_mode;
1150 :
1151 : iova_mode = rte_eal_iova_mode();
1152 :
1153 : if (spdk_iommu_is_enabled() && iova_mode == RTE_IOVA_VA) {
1154 : /* We'll use the virtual address as the iova to match DPDK. */
1155 : paddr = (uint64_t)vaddr;
1156 : rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, len);
1157 : if (rc) {
1158 : return -EFAULT;
1159 : }
1160 : while (len > 0) {
1161 : rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
1162 : if (rc != 0) {
1163 : return rc;
1164 : }
1165 : vaddr += VALUE_2MB;
1166 : paddr += VALUE_2MB;
1167 : len -= VALUE_2MB;
1168 : }
1169 : } else
1170 : #endif
1171 : {
1172 : /* Get the physical address from /proc/self/pagemap. */
1173 0 : paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
1174 0 : if (paddr == SPDK_VTOPHYS_ERROR) {
1175 0 : DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
1176 0 : return -EFAULT;
1177 : }
1178 :
1179 : /* Get paddr for each 2MB chunk in this address range */
1180 0 : while (len > 0) {
1181 : /* Get the physical address from /proc/self/pagemap. */
1182 0 : paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
1183 :
1184 0 : if (paddr == SPDK_VTOPHYS_ERROR) {
1185 0 : DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
1186 0 : return -EFAULT;
1187 : }
1188 :
1189 0 : if (paddr & MASK_2MB) {
1190 0 : DEBUG_PRINT("invalid paddr 0x%" PRIx64 " - must be 2MB aligned\n", paddr);
1191 0 : return -EINVAL;
1192 : }
1193 : #if VFIO_ENABLED
1194 : /* If the IOMMU is on, but DPDK is using iova-mode=pa, we want to register this memory
1195 : * with the IOMMU using the physical address to match. */
1196 : if (spdk_iommu_is_enabled()) {
1197 : rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, VALUE_2MB);
1198 : if (rc) {
1199 : DEBUG_PRINT("Unable to assign vaddr %p to paddr 0x%" PRIx64 "\n", vaddr, paddr);
1200 : return -EFAULT;
1201 : }
1202 : }
1203 : #endif
1204 :
1205 0 : rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
1206 0 : if (rc != 0) {
1207 0 : return rc;
1208 : }
1209 :
1210 0 : vaddr += VALUE_2MB;
1211 0 : len -= VALUE_2MB;
1212 : }
1213 : }
1214 0 : } else {
1215 : /* This is an address managed by DPDK. Just setup the translations. */
1216 0 : while (len > 0) {
1217 0 : paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
1218 0 : if (paddr == SPDK_VTOPHYS_ERROR) {
1219 0 : DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
1220 0 : return -EFAULT;
1221 : }
1222 :
1223 0 : rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
1224 0 : if (rc != 0) {
1225 0 : return rc;
1226 : }
1227 :
1228 0 : vaddr += VALUE_2MB;
1229 0 : len -= VALUE_2MB;
1230 : }
1231 : }
1232 :
1233 0 : break;
1234 : case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
1235 : #if VFIO_ENABLED
1236 : if (paddr == SPDK_VTOPHYS_ERROR) {
1237 : /*
1238 : * This is not an address that DPDK is managing.
1239 : */
1240 :
1241 : /* Check if this is a PCI BAR. They need special handling */
1242 : paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
1243 : if (paddr != SPDK_VTOPHYS_ERROR) {
1244 : /* Get paddr for each 2MB chunk in this address range */
1245 : while (len > 0) {
1246 : paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
1247 : if (paddr == SPDK_VTOPHYS_ERROR) {
1248 : DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
1249 : return -EFAULT;
1250 : }
1251 :
1252 : rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
1253 : if (rc != 0) {
1254 : return rc;
1255 : }
1256 :
1257 : vaddr += VALUE_2MB;
1258 : len -= VALUE_2MB;
1259 : }
1260 :
1261 : return 0;
1262 : }
1263 :
1264 : /* If vfio is enabled,
1265 : * we need to unmap the range from the IOMMU
1266 : */
1267 : if (spdk_iommu_is_enabled()) {
1268 : uint64_t buffer_len = len;
1269 : uint8_t *va = vaddr;
1270 : enum rte_iova_mode iova_mode;
1271 :
1272 : iova_mode = rte_eal_iova_mode();
1273 : /*
1274 : * In virtual address mode, the region is contiguous and can be done in
1275 : * one unmap.
1276 : */
1277 : if (iova_mode == RTE_IOVA_VA) {
1278 : paddr = spdk_mem_map_translate(map, (uint64_t)va, &buffer_len);
1279 : if (buffer_len != len || paddr != (uintptr_t)va) {
1280 : DEBUG_PRINT("Unmapping %p with length %lu failed because "
1281 : "translation had address 0x%" PRIx64 " and length %lu\n",
1282 : va, len, paddr, buffer_len);
1283 : return -EINVAL;
1284 : }
1285 : rc = vtophys_iommu_unmap_dma(paddr, len);
1286 : if (rc) {
1287 : DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
1288 : return -EFAULT;
1289 : }
1290 : } else if (iova_mode == RTE_IOVA_PA) {
1291 : /* Get paddr for each 2MB chunk in this address range */
1292 : while (buffer_len > 0) {
1293 : paddr = spdk_mem_map_translate(map, (uint64_t)va, NULL);
1294 :
1295 : if (paddr == SPDK_VTOPHYS_ERROR || buffer_len < VALUE_2MB) {
1296 : DEBUG_PRINT("could not get phys addr for %p\n", va);
1297 : return -EFAULT;
1298 : }
1299 :
1300 : rc = vtophys_iommu_unmap_dma(paddr, VALUE_2MB);
1301 : if (rc) {
1302 : DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
1303 : return -EFAULT;
1304 : }
1305 :
1306 : va += VALUE_2MB;
1307 : buffer_len -= VALUE_2MB;
1308 : }
1309 : }
1310 : }
1311 : }
1312 : #endif
1313 0 : while (len > 0) {
1314 0 : rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
1315 0 : if (rc != 0) {
1316 0 : return rc;
1317 : }
1318 :
1319 0 : vaddr += VALUE_2MB;
1320 0 : len -= VALUE_2MB;
1321 : }
1322 :
1323 0 : break;
1324 : default:
1325 0 : SPDK_UNREACHABLE();
1326 : }
1327 :
1328 0 : return rc;
1329 0 : }
1330 :
1331 : static int
1332 0 : numa_notify(void *cb_ctx, struct spdk_mem_map *map,
1333 : enum spdk_mem_map_notify_action action,
1334 : void *vaddr, size_t len)
1335 : {
1336 : struct rte_memseg *seg;
1337 :
1338 : /* We always return 0 from here, even if we aren't able to get a
1339 : * memseg for the address. This can happen in non-DPDK memory
1340 : * registration paths, for example vhost or vfio-user. That is OK,
1341 : * spdk_mem_get_numa_id() just returns SPDK_ENV_NUMA_ID_ANY for
1342 : * that kind of memory. If we return an error here, the
1343 : * spdk_mem_register() from vhost or vfio-user would fail which is
1344 : * not what we want.
1345 : */
1346 0 : seg = rte_mem_virt2memseg(vaddr, NULL);
1347 0 : if (seg == NULL) {
1348 0 : return 0;
1349 : }
1350 :
1351 0 : switch (action) {
1352 : case SPDK_MEM_MAP_NOTIFY_REGISTER:
1353 0 : spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, seg->socket_id);
1354 0 : break;
1355 : case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
1356 0 : spdk_mem_map_clear_translation(map, (uint64_t)vaddr, len);
1357 0 : break;
1358 : default:
1359 0 : break;
1360 : }
1361 :
1362 0 : return 0;
1363 0 : }
1364 :
1365 : static int
1366 0 : vtophys_check_contiguous_entries(uint64_t paddr1, uint64_t paddr2)
1367 : {
1368 : /* This function is always called with paddrs for two subsequent
1369 : * 2MB chunks in virtual address space, so those chunks will be only
1370 : * physically contiguous if the physical addresses are 2MB apart
1371 : * from each other as well.
1372 : */
1373 0 : return (paddr2 - paddr1 == VALUE_2MB);
1374 : }
1375 :
1376 : #if VFIO_ENABLED
1377 :
1378 : static bool
1379 : vfio_enabled(void)
1380 : {
1381 : return rte_vfio_is_enabled("vfio_pci");
1382 : }
1383 :
1384 : /* Check if IOMMU is enabled on the system */
1385 : static bool
1386 : has_iommu_groups(void)
1387 : {
1388 : int count = 0;
1389 : DIR *dir = opendir("/sys/kernel/iommu_groups");
1390 :
1391 : if (dir == NULL) {
1392 : return false;
1393 : }
1394 :
1395 : while (count < 3 && readdir(dir) != NULL) {
1396 : count++;
1397 : }
1398 :
1399 : closedir(dir);
1400 : /* there will always be ./ and ../ entries */
1401 : return count > 2;
1402 : }
1403 :
1404 : static bool
1405 : vfio_noiommu_enabled(void)
1406 : {
1407 : return rte_vfio_noiommu_is_enabled();
1408 : }
1409 :
1410 : static void
1411 : vtophys_iommu_init(void)
1412 : {
1413 : char proc_fd_path[PATH_MAX + 1];
1414 : char link_path[PATH_MAX + 1];
1415 : const char vfio_path[] = "/dev/vfio/vfio";
1416 : DIR *dir;
1417 : struct dirent *d;
1418 :
1419 : if (!vfio_enabled()) {
1420 : return;
1421 : }
1422 :
1423 : if (vfio_noiommu_enabled()) {
1424 : g_vfio.noiommu_enabled = true;
1425 : } else if (!has_iommu_groups()) {
1426 : return;
1427 : }
1428 :
1429 : dir = opendir("/proc/self/fd");
1430 : if (!dir) {
1431 : DEBUG_PRINT("Failed to open /proc/self/fd (%d)\n", errno);
1432 : return;
1433 : }
1434 :
1435 : while ((d = readdir(dir)) != NULL) {
1436 : if (d->d_type != DT_LNK) {
1437 : continue;
1438 : }
1439 :
1440 : snprintf(proc_fd_path, sizeof(proc_fd_path), "/proc/self/fd/%s", d->d_name);
1441 : if (readlink(proc_fd_path, link_path, sizeof(link_path)) != (sizeof(vfio_path) - 1)) {
1442 : continue;
1443 : }
1444 :
1445 : if (memcmp(link_path, vfio_path, sizeof(vfio_path) - 1) == 0) {
1446 : sscanf(d->d_name, "%d", &g_vfio.fd);
1447 : break;
1448 : }
1449 : }
1450 :
1451 : closedir(dir);
1452 :
1453 : if (g_vfio.fd < 0) {
1454 : DEBUG_PRINT("Failed to discover DPDK VFIO container fd.\n");
1455 : return;
1456 : }
1457 :
1458 : g_vfio.enabled = true;
1459 :
1460 : return;
1461 : }
1462 :
1463 : #endif
1464 :
1465 : void
1466 0 : vtophys_pci_device_added(struct rte_pci_device *pci_device)
1467 : {
1468 : struct spdk_vtophys_pci_device *vtophys_dev;
1469 :
1470 0 : pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
1471 :
1472 0 : vtophys_dev = calloc(1, sizeof(*vtophys_dev));
1473 0 : if (vtophys_dev) {
1474 0 : vtophys_dev->pci_device = pci_device;
1475 0 : TAILQ_INSERT_TAIL(&g_vtophys_pci_devices, vtophys_dev, tailq);
1476 0 : } else {
1477 0 : DEBUG_PRINT("Memory allocation error\n");
1478 : }
1479 0 : pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
1480 :
1481 : #if VFIO_ENABLED
1482 : struct spdk_vfio_dma_map *dma_map;
1483 : int ret;
1484 :
1485 : if (!g_vfio.enabled) {
1486 : return;
1487 : }
1488 :
1489 : pthread_mutex_lock(&g_vfio.mutex);
1490 : g_vfio.device_ref++;
1491 : if (g_vfio.device_ref > 1) {
1492 : pthread_mutex_unlock(&g_vfio.mutex);
1493 : return;
1494 : }
1495 :
1496 : /* This is the first SPDK device using DPDK vfio. This means that the first
1497 : * IOMMU group might have been just been added to the DPDK vfio container.
1498 : * From this point it is certain that the memory can be mapped now.
1499 : */
1500 : TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
1501 : ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
1502 : if (ret) {
1503 : DEBUG_PRINT("Cannot update DMA mapping, error %d\n", errno);
1504 : break;
1505 : }
1506 : }
1507 : pthread_mutex_unlock(&g_vfio.mutex);
1508 : #endif
1509 0 : }
1510 :
1511 : void
1512 0 : vtophys_pci_device_removed(struct rte_pci_device *pci_device)
1513 : {
1514 : struct spdk_vtophys_pci_device *vtophys_dev;
1515 :
1516 0 : pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
1517 0 : TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
1518 0 : if (vtophys_dev->pci_device == pci_device) {
1519 0 : TAILQ_REMOVE(&g_vtophys_pci_devices, vtophys_dev, tailq);
1520 0 : free(vtophys_dev);
1521 0 : break;
1522 : }
1523 0 : }
1524 0 : pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
1525 :
1526 : #if VFIO_ENABLED
1527 : struct spdk_vfio_dma_map *dma_map;
1528 : int ret;
1529 :
1530 : if (!g_vfio.enabled) {
1531 : return;
1532 : }
1533 :
1534 : pthread_mutex_lock(&g_vfio.mutex);
1535 : assert(g_vfio.device_ref > 0);
1536 : g_vfio.device_ref--;
1537 : if (g_vfio.device_ref > 0) {
1538 : pthread_mutex_unlock(&g_vfio.mutex);
1539 : return;
1540 : }
1541 :
1542 : /* This is the last SPDK device using DPDK vfio. If DPDK doesn't have
1543 : * any additional devices using it's vfio container, all the mappings
1544 : * will be automatically removed by the Linux vfio driver. We unmap
1545 : * the memory manually to be able to easily re-map it later regardless
1546 : * of other, external factors.
1547 : */
1548 : TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
1549 : struct vfio_iommu_type1_dma_unmap unmap = {};
1550 : unmap.argsz = sizeof(unmap);
1551 : unmap.flags = 0;
1552 : unmap.iova = dma_map->map.iova;
1553 : unmap.size = dma_map->map.size;
1554 : ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
1555 : if (ret) {
1556 : DEBUG_PRINT("Cannot unmap DMA memory, error %d\n", errno);
1557 : break;
1558 : }
1559 : }
1560 : pthread_mutex_unlock(&g_vfio.mutex);
1561 : #endif
1562 0 : }
1563 :
1564 : int
1565 0 : vtophys_init(void)
1566 : {
1567 0 : const struct spdk_mem_map_ops vtophys_map_ops = {
1568 : .notify_cb = vtophys_notify,
1569 : .are_contiguous = vtophys_check_contiguous_entries,
1570 : };
1571 :
1572 0 : const struct spdk_mem_map_ops phys_ref_map_ops = {
1573 : .notify_cb = NULL,
1574 : .are_contiguous = NULL,
1575 : };
1576 :
1577 0 : const struct spdk_mem_map_ops numa_map_ops = {
1578 : .notify_cb = numa_notify,
1579 : .are_contiguous = NULL,
1580 : };
1581 :
1582 : #if VFIO_ENABLED
1583 : vtophys_iommu_init();
1584 : #endif
1585 :
1586 0 : g_phys_ref_map = spdk_mem_map_alloc(0, &phys_ref_map_ops, NULL);
1587 0 : if (g_phys_ref_map == NULL) {
1588 0 : DEBUG_PRINT("phys_ref map allocation failed.\n");
1589 0 : return -ENOMEM;
1590 : }
1591 :
1592 0 : g_numa_map = spdk_mem_map_alloc(SPDK_ENV_NUMA_ID_ANY, &numa_map_ops, NULL);
1593 0 : if (g_numa_map == NULL) {
1594 0 : DEBUG_PRINT("numa map allocation failed.\n");
1595 0 : spdk_mem_map_free(&g_phys_ref_map);
1596 0 : return -ENOMEM;
1597 : }
1598 :
1599 0 : if (g_huge_pages) {
1600 0 : g_vtophys_map = spdk_mem_map_alloc(SPDK_VTOPHYS_ERROR, &vtophys_map_ops, NULL);
1601 0 : if (g_vtophys_map == NULL) {
1602 0 : DEBUG_PRINT("vtophys map allocation failed\n");
1603 0 : spdk_mem_map_free(&g_numa_map);
1604 0 : spdk_mem_map_free(&g_phys_ref_map);
1605 0 : return -ENOMEM;
1606 : }
1607 0 : }
1608 0 : return 0;
1609 0 : }
1610 :
1611 : uint64_t
1612 0 : spdk_vtophys(const void *buf, uint64_t *size)
1613 : {
1614 : uint64_t vaddr, paddr_2mb;
1615 :
1616 0 : if (!g_huge_pages) {
1617 0 : return SPDK_VTOPHYS_ERROR;
1618 : }
1619 :
1620 0 : vaddr = (uint64_t)buf;
1621 0 : paddr_2mb = spdk_mem_map_translate(g_vtophys_map, vaddr, size);
1622 :
1623 : /*
1624 : * SPDK_VTOPHYS_ERROR has all bits set, so if the lookup returned SPDK_VTOPHYS_ERROR,
1625 : * we will still bitwise-or it with the buf offset below, but the result will still be
1626 : * SPDK_VTOPHYS_ERROR. However now that we do + rather than | (due to PCI vtophys being
1627 : * unaligned) we must now check the return value before addition.
1628 : */
1629 : SPDK_STATIC_ASSERT(SPDK_VTOPHYS_ERROR == UINT64_C(-1), "SPDK_VTOPHYS_ERROR should be all 1s");
1630 0 : if (paddr_2mb == SPDK_VTOPHYS_ERROR) {
1631 0 : return SPDK_VTOPHYS_ERROR;
1632 : } else {
1633 0 : return paddr_2mb + (vaddr & MASK_2MB);
1634 : }
1635 0 : }
1636 :
1637 : int32_t
1638 0 : spdk_mem_get_numa_id(const void *buf, uint64_t *size)
1639 : {
1640 0 : return spdk_mem_map_translate(g_numa_map, (uint64_t)buf, size);
1641 : }
1642 :
1643 : int
1644 0 : spdk_mem_get_fd_and_offset(void *vaddr, uint64_t *offset)
1645 : {
1646 : struct rte_memseg *seg;
1647 : int ret, fd;
1648 :
1649 0 : seg = rte_mem_virt2memseg(vaddr, NULL);
1650 0 : if (!seg) {
1651 0 : SPDK_ERRLOG("memory %p doesn't exist\n", vaddr);
1652 0 : return -ENOENT;
1653 : }
1654 :
1655 0 : fd = rte_memseg_get_fd_thread_unsafe(seg);
1656 0 : if (fd < 0) {
1657 0 : return fd;
1658 : }
1659 :
1660 0 : ret = rte_memseg_get_fd_offset_thread_unsafe(seg, offset);
1661 0 : if (ret < 0) {
1662 0 : return ret;
1663 : }
1664 :
1665 0 : return fd;
1666 0 : }
1667 :
1668 : void
1669 0 : mem_disable_huge_pages(void)
1670 : {
1671 0 : g_huge_pages = false;
1672 0 : }
|