LCOV - code coverage report
Current view: top level - lib/env_dpdk - memory.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 683 0.0 %
Date: 2024-07-14 23:09:12 Functions: 0 36 0.0 %

          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             :              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             :                                                         (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             :                         }
     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             :                                 }
     173             : 
     174           0 :                                 contig_end = vaddr;
     175             :                         } 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             :                                                                 (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             :                                 }
     191           0 :                                 contig_start = UINT64_MAX;
     192             :                         }
     193             :                 }
     194             :         }
     195             : 
     196           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     197           0 :         return 0;
     198             : 
     199           0 : 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             :                                                    (void *)contig_start,
     218           0 :                                                    contig_end - contig_start + VALUE_2MB);
     219             :                         }
     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             :                                 }
     233           0 :                                 contig_start = vaddr;
     234             :                         } 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             :                                         }
     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             :                                                            (void *)contig_start,
     243           0 :                                                            contig_end - contig_start + VALUE_2MB);
     244             :                                 }
     245           0 :                                 contig_end = UINT64_MAX;
     246             :                         }
     247             :                 }
     248           0 :                 idx_1gb = sizeof(map_1gb->map) / sizeof(map_1gb->map[0]) - 1;
     249             :         }
     250             : 
     251           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     252           0 :         return rc;
     253             : }
     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             :         }
     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             :                         }
     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             :         }
     294             : 
     295           0 :         return map;
     296             : }
     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             :         }
     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             :         }
     324             : 
     325           0 :         pthread_mutex_destroy(&map->mutex);
     326             : 
     327           0 :         free(map);
     328           0 :         *pmap = NULL;
     329             : }
     330             : 
     331             : int
     332           0 : spdk_mem_register(void *vaddr, size_t len)
     333             : {
     334             :         struct spdk_mem_map *map;
     335             :         int rc;
     336             :         void *seg_vaddr;
     337             :         size_t seg_len;
     338             :         uint64_t reg;
     339             : 
     340           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     341           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
     342           0 :                 return -EINVAL;
     343             :         }
     344             : 
     345           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     346           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
     347             :                             __func__, vaddr, len);
     348           0 :                 return -EINVAL;
     349             :         }
     350             : 
     351           0 :         if (len == 0) {
     352           0 :                 return 0;
     353             :         }
     354             : 
     355           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     356             : 
     357           0 :         seg_vaddr = vaddr;
     358           0 :         seg_len = len;
     359           0 :         while (seg_len > 0) {
     360           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     361           0 :                 if (reg & REG_MAP_REGISTERED) {
     362           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     363           0 :                         return -EBUSY;
     364             :                 }
     365           0 :                 seg_vaddr += VALUE_2MB;
     366           0 :                 seg_len -= VALUE_2MB;
     367             :         }
     368             : 
     369           0 :         seg_vaddr = vaddr;
     370           0 :         seg_len = 0;
     371           0 :         while (len > 0) {
     372           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB,
     373             :                                              seg_len == 0 ? REG_MAP_REGISTERED | REG_MAP_NOTIFY_START : REG_MAP_REGISTERED);
     374           0 :                 seg_len += VALUE_2MB;
     375           0 :                 vaddr += VALUE_2MB;
     376           0 :                 len -= VALUE_2MB;
     377             :         }
     378             : 
     379           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     380           0 :                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER, seg_vaddr, seg_len);
     381           0 :                 if (rc != 0) {
     382           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     383           0 :                         return rc;
     384             :                 }
     385             :         }
     386             : 
     387           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     388           0 :         return 0;
     389             : }
     390             : 
     391             : int
     392           0 : spdk_mem_unregister(void *vaddr, size_t len)
     393             : {
     394             :         struct spdk_mem_map *map;
     395             :         int rc;
     396             :         void *seg_vaddr;
     397             :         size_t seg_len;
     398             :         uint64_t reg, newreg;
     399             : 
     400           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     401           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
     402           0 :                 return -EINVAL;
     403             :         }
     404             : 
     405           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     406           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
     407             :                             __func__, vaddr, len);
     408           0 :                 return -EINVAL;
     409             :         }
     410             : 
     411           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     412             : 
     413             :         /* The first page must be a start of a region. Also check if it's
     414             :          * registered to make sure we don't return -ERANGE for non-registered
     415             :          * regions.
     416             :          */
     417           0 :         reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     418           0 :         if ((reg & REG_MAP_REGISTERED) && (reg & REG_MAP_NOTIFY_START) == 0) {
     419           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     420           0 :                 return -ERANGE;
     421             :         }
     422             : 
     423           0 :         seg_vaddr = vaddr;
     424           0 :         seg_len = len;
     425           0 :         while (seg_len > 0) {
     426           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     427           0 :                 if ((reg & REG_MAP_REGISTERED) == 0) {
     428           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     429           0 :                         return -EINVAL;
     430             :                 }
     431           0 :                 seg_vaddr += VALUE_2MB;
     432           0 :                 seg_len -= VALUE_2MB;
     433             :         }
     434             : 
     435           0 :         newreg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     436             :         /* If the next page is registered, it must be a start of a region as well,
     437             :          * otherwise we'd be unregistering only a part of a region.
     438             :          */
     439           0 :         if ((newreg & REG_MAP_NOTIFY_START) == 0 && (newreg & REG_MAP_REGISTERED)) {
     440           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     441           0 :                 return -ERANGE;
     442             :         }
     443           0 :         seg_vaddr = vaddr;
     444           0 :         seg_len = 0;
     445             : 
     446           0 :         while (len > 0) {
     447           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     448           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB, 0);
     449             : 
     450           0 :                 if (seg_len > 0 && (reg & REG_MAP_NOTIFY_START)) {
     451           0 :                         TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     452           0 :                                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
     453           0 :                                 if (rc != 0) {
     454           0 :                                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     455           0 :                                         return rc;
     456             :                                 }
     457             :                         }
     458             : 
     459           0 :                         seg_vaddr = vaddr;
     460           0 :                         seg_len = VALUE_2MB;
     461             :                 } else {
     462           0 :                         seg_len += VALUE_2MB;
     463             :                 }
     464             : 
     465           0 :                 vaddr += VALUE_2MB;
     466           0 :                 len -= VALUE_2MB;
     467             :         }
     468             : 
     469           0 :         if (seg_len > 0) {
     470           0 :                 TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     471           0 :                         rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
     472           0 :                         if (rc != 0) {
     473           0 :                                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     474           0 :                                 return rc;
     475             :                         }
     476             :                 }
     477             :         }
     478             : 
     479           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     480           0 :         return 0;
     481             : }
     482             : 
     483             : int
     484           0 : spdk_mem_reserve(void *vaddr, size_t len)
     485             : {
     486             :         struct spdk_mem_map *map;
     487             :         void *seg_vaddr;
     488             :         size_t seg_len;
     489             :         uint64_t reg;
     490             : 
     491           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     492           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
     493           0 :                 return -EINVAL;
     494             :         }
     495             : 
     496           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     497           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
     498             :                             __func__, vaddr, len);
     499           0 :                 return -EINVAL;
     500             :         }
     501             : 
     502           0 :         if (len == 0) {
     503           0 :                 return 0;
     504             :         }
     505             : 
     506           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     507             : 
     508             :         /* Check if any part of this range is already registered */
     509           0 :         seg_vaddr = vaddr;
     510           0 :         seg_len = len;
     511           0 :         while (seg_len > 0) {
     512           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     513           0 :                 if (reg & REG_MAP_REGISTERED) {
     514           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     515           0 :                         return -EBUSY;
     516             :                 }
     517           0 :                 seg_vaddr += VALUE_2MB;
     518           0 :                 seg_len -= VALUE_2MB;
     519             :         }
     520             : 
     521             :         /* Simply set the translation to the memory map's default. This allocates the space in the
     522             :          * map but does not provide a valid translation. */
     523           0 :         spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, len,
     524           0 :                                      g_mem_reg_map->default_translation);
     525             : 
     526           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     527           0 :                 spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, map->default_translation);
     528             :         }
     529             : 
     530           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     531           0 :         return 0;
     532             : }
     533             : 
     534             : static struct map_1gb *
     535           0 : mem_map_get_map_1gb(struct spdk_mem_map *map, uint64_t vfn_2mb)
     536             : {
     537             :         struct map_1gb *map_1gb;
     538           0 :         uint64_t idx_256tb = MAP_256TB_IDX(vfn_2mb);
     539             :         size_t i;
     540             : 
     541           0 :         if (spdk_unlikely(idx_256tb >= SPDK_COUNTOF(map->map_256tb.map))) {
     542           0 :                 return NULL;
     543             :         }
     544             : 
     545           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     546             : 
     547           0 :         if (!map_1gb) {
     548           0 :                 pthread_mutex_lock(&map->mutex);
     549             : 
     550             :                 /* Recheck to make sure nobody else got the mutex first. */
     551           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     552           0 :                 if (!map_1gb) {
     553           0 :                         map_1gb = malloc(sizeof(struct map_1gb));
     554           0 :                         if (map_1gb) {
     555             :                                 /* initialize all entries to default translation */
     556           0 :                                 for (i = 0; i < SPDK_COUNTOF(map_1gb->map); i++) {
     557           0 :                                         map_1gb->map[i].translation_2mb = map->default_translation;
     558             :                                 }
     559           0 :                                 map->map_256tb.map[idx_256tb] = map_1gb;
     560             :                         }
     561             :                 }
     562             : 
     563           0 :                 pthread_mutex_unlock(&map->mutex);
     564             : 
     565           0 :                 if (!map_1gb) {
     566           0 :                         DEBUG_PRINT("allocation failed\n");
     567           0 :                         return NULL;
     568             :                 }
     569             :         }
     570             : 
     571           0 :         return map_1gb;
     572             : }
     573             : 
     574             : int
     575           0 : spdk_mem_map_set_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size,
     576             :                              uint64_t translation)
     577             : {
     578             :         uint64_t vfn_2mb;
     579             :         struct map_1gb *map_1gb;
     580             :         uint64_t idx_1gb;
     581             :         struct map_2mb *map_2mb;
     582             : 
     583           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     584           0 :                 DEBUG_PRINT("invalid usermode virtual address %" PRIu64 "\n", vaddr);
     585           0 :                 return -EINVAL;
     586             :         }
     587             : 
     588             :         /* For now, only 2 MB-aligned registrations are supported */
     589           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (size & MASK_2MB)) {
     590           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%" PRIu64 " len=%" PRIu64 "\n",
     591             :                             __func__, vaddr, size);
     592           0 :                 return -EINVAL;
     593             :         }
     594             : 
     595           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     596             : 
     597           0 :         while (size) {
     598           0 :                 map_1gb = mem_map_get_map_1gb(map, vfn_2mb);
     599           0 :                 if (!map_1gb) {
     600           0 :                         DEBUG_PRINT("could not get %p map\n", (void *)vaddr);
     601           0 :                         return -ENOMEM;
     602             :                 }
     603             : 
     604           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     605           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     606           0 :                 map_2mb->translation_2mb = translation;
     607             : 
     608           0 :                 size -= VALUE_2MB;
     609           0 :                 vfn_2mb++;
     610             :         }
     611             : 
     612           0 :         return 0;
     613             : }
     614             : 
     615             : int
     616           0 : spdk_mem_map_clear_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size)
     617             : {
     618           0 :         return spdk_mem_map_set_translation(map, vaddr, size, map->default_translation);
     619             : }
     620             : 
     621             : inline uint64_t
     622           0 : spdk_mem_map_translate(const struct spdk_mem_map *map, uint64_t vaddr, uint64_t *size)
     623             : {
     624             :         const struct map_1gb *map_1gb;
     625             :         const struct map_2mb *map_2mb;
     626             :         uint64_t idx_256tb;
     627             :         uint64_t idx_1gb;
     628             :         uint64_t vfn_2mb;
     629             :         uint64_t cur_size;
     630             :         uint64_t prev_translation;
     631             :         uint64_t orig_translation;
     632             : 
     633           0 :         if (spdk_unlikely(vaddr & ~MASK_256TB)) {
     634           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", (void *)vaddr);
     635           0 :                 return map->default_translation;
     636             :         }
     637             : 
     638           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     639           0 :         idx_256tb = MAP_256TB_IDX(vfn_2mb);
     640           0 :         idx_1gb = MAP_1GB_IDX(vfn_2mb);
     641             : 
     642           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     643           0 :         if (spdk_unlikely(!map_1gb)) {
     644           0 :                 return map->default_translation;
     645             :         }
     646             : 
     647           0 :         cur_size = VALUE_2MB - _2MB_OFFSET(vaddr);
     648           0 :         map_2mb = &map_1gb->map[idx_1gb];
     649           0 :         if (size == NULL || map->ops.are_contiguous == NULL ||
     650           0 :             map_2mb->translation_2mb == map->default_translation) {
     651           0 :                 if (size != NULL) {
     652           0 :                         *size = spdk_min(*size, cur_size);
     653             :                 }
     654           0 :                 return map_2mb->translation_2mb;
     655             :         }
     656             : 
     657           0 :         orig_translation = map_2mb->translation_2mb;
     658           0 :         prev_translation = orig_translation;
     659           0 :         while (cur_size < *size) {
     660           0 :                 vfn_2mb++;
     661           0 :                 idx_256tb = MAP_256TB_IDX(vfn_2mb);
     662           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     663             : 
     664           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     665           0 :                 if (spdk_unlikely(!map_1gb)) {
     666           0 :                         break;
     667             :                 }
     668             : 
     669           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     670           0 :                 if (!map->ops.are_contiguous(prev_translation, map_2mb->translation_2mb)) {
     671           0 :                         break;
     672             :                 }
     673             : 
     674           0 :                 cur_size += VALUE_2MB;
     675           0 :                 prev_translation = map_2mb->translation_2mb;
     676             :         }
     677             : 
     678           0 :         *size = spdk_min(*size, cur_size);
     679           0 :         return orig_translation;
     680             : }
     681             : 
     682             : static void
     683           0 : memory_hotplug_cb(enum rte_mem_event event_type,
     684             :                   const void *addr, size_t len, void *arg)
     685             : {
     686           0 :         if (event_type == RTE_MEM_EVENT_ALLOC) {
     687           0 :                 spdk_mem_register((void *)addr, len);
     688             : 
     689           0 :                 if (!spdk_env_dpdk_external_init()) {
     690           0 :                         return;
     691             :                 }
     692             : 
     693             :                 /* When the user initialized DPDK separately, we can't
     694             :                  * be sure that --match-allocations RTE flag was specified.
     695             :                  * Without this flag, DPDK can free memory in different units
     696             :                  * than it was allocated. It doesn't work with things like RDMA MRs.
     697             :                  *
     698             :                  * For such cases, we mark segments so they aren't freed.
     699             :                  */
     700           0 :                 while (len > 0) {
     701             :                         struct rte_memseg *seg;
     702             : 
     703           0 :                         seg = rte_mem_virt2memseg(addr, NULL);
     704           0 :                         assert(seg != NULL);
     705           0 :                         seg->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
     706           0 :                         addr = (void *)((uintptr_t)addr + seg->hugepage_sz);
     707           0 :                         len -= seg->hugepage_sz;
     708             :                 }
     709           0 :         } else if (event_type == RTE_MEM_EVENT_FREE) {
     710           0 :                 spdk_mem_unregister((void *)addr, len);
     711             :         }
     712             : }
     713             : 
     714             : static int
     715           0 : memory_iter_cb(const struct rte_memseg_list *msl,
     716             :                const struct rte_memseg *ms, size_t len, void *arg)
     717             : {
     718           0 :         return spdk_mem_register(ms->addr, len);
     719             : }
     720             : 
     721             : int
     722           0 : mem_map_init(bool legacy_mem)
     723             : {
     724           0 :         g_legacy_mem = legacy_mem;
     725             : 
     726           0 :         g_mem_reg_map = spdk_mem_map_alloc(0, NULL, NULL);
     727           0 :         if (g_mem_reg_map == NULL) {
     728           0 :                 DEBUG_PRINT("memory registration map allocation failed\n");
     729           0 :                 return -ENOMEM;
     730             :         }
     731             : 
     732             :         /*
     733             :          * Walk all DPDK memory segments and register them
     734             :          * with the main memory map
     735             :          */
     736           0 :         if (g_huge_pages) {
     737           0 :                 rte_mem_event_callback_register("spdk", memory_hotplug_cb, NULL);
     738           0 :                 rte_memseg_contig_walk(memory_iter_cb, NULL);
     739             :         }
     740           0 :         return 0;
     741             : }
     742             : 
     743             : bool
     744           0 : spdk_iommu_is_enabled(void)
     745             : {
     746             : #if VFIO_ENABLED
     747           0 :         return g_vfio.enabled && !g_vfio.noiommu_enabled;
     748             : #else
     749             :         return false;
     750             : #endif
     751             : }
     752             : 
     753             : struct spdk_vtophys_pci_device {
     754             :         struct rte_pci_device *pci_device;
     755             :         TAILQ_ENTRY(spdk_vtophys_pci_device) tailq;
     756             : };
     757             : 
     758             : static pthread_mutex_t g_vtophys_pci_devices_mutex = PTHREAD_MUTEX_INITIALIZER;
     759             : static TAILQ_HEAD(, spdk_vtophys_pci_device) g_vtophys_pci_devices =
     760             :         TAILQ_HEAD_INITIALIZER(g_vtophys_pci_devices);
     761             : 
     762             : static struct spdk_mem_map *g_vtophys_map;
     763             : static struct spdk_mem_map *g_phys_ref_map;
     764             : 
     765             : #if VFIO_ENABLED
     766             : static int
     767           0 : _vfio_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     768             : {
     769             :         struct spdk_vfio_dma_map *dma_map;
     770             :         int ret;
     771             : 
     772           0 :         dma_map = calloc(1, sizeof(*dma_map));
     773           0 :         if (dma_map == NULL) {
     774           0 :                 return -ENOMEM;
     775             :         }
     776             : 
     777           0 :         dma_map->map.argsz = sizeof(dma_map->map);
     778           0 :         dma_map->map.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
     779           0 :         dma_map->map.vaddr = vaddr;
     780           0 :         dma_map->map.iova = iova;
     781           0 :         dma_map->map.size = size;
     782             : 
     783           0 :         if (g_vfio.device_ref == 0) {
     784             :                 /* VFIO requires at least one device (IOMMU group) to be added to
     785             :                  * a VFIO container before it is possible to perform any IOMMU
     786             :                  * operations on that container. This memory will be mapped once
     787             :                  * the first device (IOMMU group) is hotplugged.
     788             :                  *
     789             :                  * Since the vfio container is managed internally by DPDK, it is
     790             :                  * also possible that some device is already in that container, but
     791             :                  * it's not managed by SPDK -  e.g. an NIC attached internally
     792             :                  * inside DPDK. We could map the memory straight away in such
     793             :                  * scenario, but there's no need to do it. DPDK devices clearly
     794             :                  * don't need our mappings and hence we defer the mapping
     795             :                  * unconditionally until the first SPDK-managed device is
     796             :                  * hotplugged.
     797             :                  */
     798           0 :                 goto out_insert;
     799             :         }
     800             : 
     801           0 :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
     802           0 :         if (ret) {
     803             :                 /* There are cases the vfio container doesn't have IOMMU group, it's safe for this case */
     804           0 :                 SPDK_NOTICELOG("Cannot set up DMA mapping, error %d, ignored\n", errno);
     805             :         }
     806             : 
     807           0 : out_insert:
     808           0 :         TAILQ_INSERT_TAIL(&g_vfio.maps, dma_map, tailq);
     809           0 :         return 0;
     810             : }
     811             : 
     812             : 
     813             : static int
     814           0 : vtophys_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     815             : {
     816             :         uint64_t refcount;
     817             :         int ret;
     818             : 
     819           0 :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     820           0 :         assert(refcount < UINT64_MAX);
     821           0 :         if (refcount > 0) {
     822           0 :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     823           0 :                 return 0;
     824             :         }
     825             : 
     826           0 :         pthread_mutex_lock(&g_vfio.mutex);
     827           0 :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     828           0 :         pthread_mutex_unlock(&g_vfio.mutex);
     829           0 :         if (ret) {
     830           0 :                 return ret;
     831             :         }
     832             : 
     833           0 :         spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     834           0 :         return 0;
     835             : }
     836             : 
     837             : int
     838           0 : vtophys_iommu_map_dma_bar(uint64_t vaddr, uint64_t iova, uint64_t size)
     839             : {
     840             :         int ret;
     841             : 
     842           0 :         pthread_mutex_lock(&g_vfio.mutex);
     843           0 :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     844           0 :         pthread_mutex_unlock(&g_vfio.mutex);
     845             : 
     846           0 :         return ret;
     847             : }
     848             : 
     849             : static int
     850           0 : _vfio_iommu_unmap_dma(struct spdk_vfio_dma_map *dma_map)
     851             : {
     852           0 :         struct vfio_iommu_type1_dma_unmap unmap = {};
     853             :         int ret;
     854             : 
     855           0 :         if (g_vfio.device_ref == 0) {
     856             :                 /* Memory is not mapped anymore, just remove it's references */
     857           0 :                 goto out_remove;
     858             :         }
     859             : 
     860           0 :         unmap.argsz = sizeof(unmap);
     861           0 :         unmap.flags = 0;
     862           0 :         unmap.iova = dma_map->map.iova;
     863           0 :         unmap.size = dma_map->map.size;
     864           0 :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
     865           0 :         if (ret) {
     866           0 :                 SPDK_NOTICELOG("Cannot clear DMA mapping, error %d, ignored\n", errno);
     867             :         }
     868             : 
     869           0 : out_remove:
     870           0 :         TAILQ_REMOVE(&g_vfio.maps, dma_map, tailq);
     871           0 :         free(dma_map);
     872           0 :         return 0;
     873             : }
     874             : 
     875             : static int
     876           0 : vtophys_iommu_unmap_dma(uint64_t iova, uint64_t size)
     877             : {
     878             :         struct spdk_vfio_dma_map *dma_map;
     879             :         uint64_t refcount;
     880             :         int ret;
     881             : 
     882           0 :         pthread_mutex_lock(&g_vfio.mutex);
     883           0 :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     884           0 :                 if (dma_map->map.iova == iova) {
     885           0 :                         break;
     886             :                 }
     887             :         }
     888             : 
     889           0 :         if (dma_map == NULL) {
     890           0 :                 DEBUG_PRINT("Cannot clear DMA mapping for IOVA %"PRIx64" - it's not mapped\n", iova);
     891           0 :                 pthread_mutex_unlock(&g_vfio.mutex);
     892           0 :                 return -ENXIO;
     893             :         }
     894             : 
     895           0 :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     896           0 :         assert(refcount < UINT64_MAX);
     897           0 :         if (refcount > 0) {
     898           0 :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount - 1);
     899             :         }
     900             : 
     901             :         /* We still have outstanding references, don't clear it. */
     902           0 :         if (refcount > 1) {
     903           0 :                 pthread_mutex_unlock(&g_vfio.mutex);
     904           0 :                 return 0;
     905             :         }
     906             : 
     907             :         /** don't support partial or multiple-page unmap for now */
     908           0 :         assert(dma_map->map.size == size);
     909             : 
     910           0 :         ret = _vfio_iommu_unmap_dma(dma_map);
     911           0 :         pthread_mutex_unlock(&g_vfio.mutex);
     912             : 
     913           0 :         return ret;
     914             : }
     915             : 
     916             : int
     917           0 : vtophys_iommu_unmap_dma_bar(uint64_t vaddr)
     918             : {
     919             :         struct spdk_vfio_dma_map *dma_map;
     920             :         int ret;
     921             : 
     922           0 :         pthread_mutex_lock(&g_vfio.mutex);
     923           0 :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     924           0 :                 if (dma_map->map.vaddr == vaddr) {
     925           0 :                         break;
     926             :                 }
     927             :         }
     928             : 
     929           0 :         if (dma_map == NULL) {
     930           0 :                 DEBUG_PRINT("Cannot clear DMA mapping for address %"PRIx64" - it's not mapped\n", vaddr);
     931           0 :                 pthread_mutex_unlock(&g_vfio.mutex);
     932           0 :                 return -ENXIO;
     933             :         }
     934             : 
     935           0 :         ret = _vfio_iommu_unmap_dma(dma_map);
     936           0 :         pthread_mutex_unlock(&g_vfio.mutex);
     937           0 :         return ret;
     938             : }
     939             : #endif
     940             : 
     941             : static uint64_t
     942           0 : vtophys_get_paddr_memseg(uint64_t vaddr)
     943             : {
     944             :         uintptr_t paddr;
     945             :         struct rte_memseg *seg;
     946             : 
     947           0 :         seg = rte_mem_virt2memseg((void *)(uintptr_t)vaddr, NULL);
     948           0 :         if (seg != NULL) {
     949           0 :                 paddr = seg->iova;
     950           0 :                 if (paddr == RTE_BAD_IOVA) {
     951           0 :                         return SPDK_VTOPHYS_ERROR;
     952             :                 }
     953           0 :                 paddr += (vaddr - (uintptr_t)seg->addr);
     954           0 :                 return paddr;
     955             :         }
     956             : 
     957           0 :         return SPDK_VTOPHYS_ERROR;
     958             : }
     959             : 
     960             : /* Try to get the paddr from /proc/self/pagemap */
     961             : static uint64_t
     962           0 : vtophys_get_paddr_pagemap(uint64_t vaddr)
     963             : {
     964             :         uintptr_t paddr;
     965             : 
     966             :         /* Silence static analyzers */
     967           0 :         assert(vaddr != 0);
     968           0 :         paddr = rte_mem_virt2iova((void *)vaddr);
     969           0 :         if (paddr == RTE_BAD_IOVA) {
     970             :                 /*
     971             :                  * The vaddr may be valid but doesn't have a backing page
     972             :                  * assigned yet.  Touch the page to ensure a backing page
     973             :                  * gets assigned, then try to translate again.
     974             :                  */
     975           0 :                 rte_atomic64_read((rte_atomic64_t *)vaddr);
     976           0 :                 paddr = rte_mem_virt2iova((void *)vaddr);
     977             :         }
     978           0 :         if (paddr == RTE_BAD_IOVA) {
     979             :                 /* Unable to get to the physical address. */
     980           0 :                 return SPDK_VTOPHYS_ERROR;
     981             :         }
     982             : 
     983           0 :         return paddr;
     984             : }
     985             : 
     986             : static uint64_t
     987           0 : pci_device_vtophys(struct rte_pci_device *dev, uint64_t vaddr, size_t len)
     988             : {
     989             :         struct rte_mem_resource *res;
     990             :         uint64_t paddr;
     991             :         unsigned r;
     992             : 
     993           0 :         for (r = 0; r < PCI_MAX_RESOURCE; r++) {
     994           0 :                 res = dpdk_pci_device_get_mem_resource(dev, r);
     995             : 
     996           0 :                 if (res->phys_addr == 0 || vaddr < (uint64_t)res->addr ||
     997           0 :                     (vaddr + len) >= (uint64_t)res->addr + res->len) {
     998           0 :                         continue;
     999             :                 }
    1000             : 
    1001             : #if VFIO_ENABLED
    1002           0 :                 if (spdk_iommu_is_enabled() && rte_eal_iova_mode() == RTE_IOVA_VA) {
    1003             :                         /*
    1004             :                          * The IOMMU is on and we're using IOVA == VA. The BAR was
    1005             :                          * automatically registered when it was mapped, so just return
    1006             :                          * the virtual address here.
    1007             :                          */
    1008           0 :                         return vaddr;
    1009             :                 }
    1010             : #endif
    1011           0 :                 paddr = res->phys_addr + (vaddr - (uint64_t)res->addr);
    1012           0 :                 return paddr;
    1013             :         }
    1014             : 
    1015           0 :         return SPDK_VTOPHYS_ERROR;
    1016             : }
    1017             : 
    1018             : /* Try to get the paddr from pci devices */
    1019             : static uint64_t
    1020           0 : vtophys_get_paddr_pci(uint64_t vaddr, size_t len)
    1021             : {
    1022             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1023             :         uintptr_t paddr;
    1024             :         struct rte_pci_device   *dev;
    1025             : 
    1026           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1027           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1028           0 :                 dev = vtophys_dev->pci_device;
    1029           0 :                 paddr = pci_device_vtophys(dev, vaddr, len);
    1030           0 :                 if (paddr != SPDK_VTOPHYS_ERROR) {
    1031           0 :                         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1032           0 :                         return paddr;
    1033             :                 }
    1034             :         }
    1035           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1036             : 
    1037           0 :         return SPDK_VTOPHYS_ERROR;
    1038             : }
    1039             : 
    1040             : static int
    1041           0 : vtophys_notify(void *cb_ctx, struct spdk_mem_map *map,
    1042             :                enum spdk_mem_map_notify_action action,
    1043             :                void *vaddr, size_t len)
    1044             : {
    1045           0 :         int rc = 0;
    1046             :         uint64_t paddr;
    1047             : 
    1048           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
    1049           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
    1050           0 :                 return -EINVAL;
    1051             :         }
    1052             : 
    1053           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
    1054           0 :                 DEBUG_PRINT("invalid parameters, vaddr=%p len=%ju\n",
    1055             :                             vaddr, len);
    1056           0 :                 return -EINVAL;
    1057             :         }
    1058             : 
    1059             :         /* Get the physical address from the DPDK memsegs */
    1060           0 :         paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1061             : 
    1062           0 :         switch (action) {
    1063           0 :         case SPDK_MEM_MAP_NOTIFY_REGISTER:
    1064           0 :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1065             :                         /* This is not an address that DPDK is managing. */
    1066             : 
    1067             :                         /* Check if this is a PCI BAR. They need special handling */
    1068           0 :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1069           0 :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1070             :                                 /* Get paddr for each 2MB chunk in this address range */
    1071           0 :                                 while (len > 0) {
    1072           0 :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1073           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1074           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1075           0 :                                                 return -EFAULT;
    1076             :                                         }
    1077             : 
    1078           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1079           0 :                                         if (rc != 0) {
    1080           0 :                                                 return rc;
    1081             :                                         }
    1082             : 
    1083           0 :                                         vaddr += VALUE_2MB;
    1084           0 :                                         len -= VALUE_2MB;
    1085             :                                 }
    1086             : 
    1087           0 :                                 return 0;
    1088             :                         }
    1089             : 
    1090             : #if VFIO_ENABLED
    1091             :                         enum rte_iova_mode iova_mode;
    1092             : 
    1093           0 :                         iova_mode = rte_eal_iova_mode();
    1094             : 
    1095           0 :                         if (spdk_iommu_is_enabled() && iova_mode == RTE_IOVA_VA) {
    1096             :                                 /* We'll use the virtual address as the iova to match DPDK. */
    1097           0 :                                 paddr = (uint64_t)vaddr;
    1098           0 :                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, len);
    1099           0 :                                 if (rc) {
    1100           0 :                                         return -EFAULT;
    1101             :                                 }
    1102           0 :                                 while (len > 0) {
    1103           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1104           0 :                                         if (rc != 0) {
    1105           0 :                                                 return rc;
    1106             :                                         }
    1107           0 :                                         vaddr += VALUE_2MB;
    1108           0 :                                         paddr += VALUE_2MB;
    1109           0 :                                         len -= VALUE_2MB;
    1110             :                                 }
    1111             :                         } else
    1112             : #endif
    1113             :                         {
    1114             :                                 /* Get the physical address from /proc/self/pagemap. */
    1115           0 :                                 paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1116           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1117           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1118           0 :                                         return -EFAULT;
    1119             :                                 }
    1120             : 
    1121             :                                 /* Get paddr for each 2MB chunk in this address range */
    1122           0 :                                 while (len > 0) {
    1123             :                                         /* Get the physical address from /proc/self/pagemap. */
    1124           0 :                                         paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1125             : 
    1126           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1127           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1128           0 :                                                 return -EFAULT;
    1129             :                                         }
    1130             : 
    1131           0 :                                         if (paddr & MASK_2MB) {
    1132           0 :                                                 DEBUG_PRINT("invalid paddr 0x%" PRIx64 " - must be 2MB aligned\n", paddr);
    1133           0 :                                                 return -EINVAL;
    1134             :                                         }
    1135             : #if VFIO_ENABLED
    1136             :                                         /* If the IOMMU is on, but DPDK is using iova-mode=pa, we want to register this memory
    1137             :                                          * with the IOMMU using the physical address to match. */
    1138           0 :                                         if (spdk_iommu_is_enabled()) {
    1139           0 :                                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, VALUE_2MB);
    1140           0 :                                                 if (rc) {
    1141           0 :                                                         DEBUG_PRINT("Unable to assign vaddr %p to paddr 0x%" PRIx64 "\n", vaddr, paddr);
    1142           0 :                                                         return -EFAULT;
    1143             :                                                 }
    1144             :                                         }
    1145             : #endif
    1146             : 
    1147           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1148           0 :                                         if (rc != 0) {
    1149           0 :                                                 return rc;
    1150             :                                         }
    1151             : 
    1152           0 :                                         vaddr += VALUE_2MB;
    1153           0 :                                         len -= VALUE_2MB;
    1154             :                                 }
    1155             :                         }
    1156             :                 } else {
    1157             :                         /* This is an address managed by DPDK. Just setup the translations. */
    1158           0 :                         while (len > 0) {
    1159           0 :                                 paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1160           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1161           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1162           0 :                                         return -EFAULT;
    1163             :                                 }
    1164             : 
    1165           0 :                                 rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1166           0 :                                 if (rc != 0) {
    1167           0 :                                         return rc;
    1168             :                                 }
    1169             : 
    1170           0 :                                 vaddr += VALUE_2MB;
    1171           0 :                                 len -= VALUE_2MB;
    1172             :                         }
    1173             :                 }
    1174             : 
    1175           0 :                 break;
    1176           0 :         case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
    1177             : #if VFIO_ENABLED
    1178           0 :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1179             :                         /*
    1180             :                          * This is not an address that DPDK is managing.
    1181             :                          */
    1182             : 
    1183             :                         /* Check if this is a PCI BAR. They need special handling */
    1184           0 :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1185           0 :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1186             :                                 /* Get paddr for each 2MB chunk in this address range */
    1187           0 :                                 while (len > 0) {
    1188           0 :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1189           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1190           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1191           0 :                                                 return -EFAULT;
    1192             :                                         }
    1193             : 
    1194           0 :                                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1195           0 :                                         if (rc != 0) {
    1196           0 :                                                 return rc;
    1197             :                                         }
    1198             : 
    1199           0 :                                         vaddr += VALUE_2MB;
    1200           0 :                                         len -= VALUE_2MB;
    1201             :                                 }
    1202             : 
    1203           0 :                                 return 0;
    1204             :                         }
    1205             : 
    1206             :                         /* If vfio is enabled,
    1207             :                          * we need to unmap the range from the IOMMU
    1208             :                          */
    1209           0 :                         if (spdk_iommu_is_enabled()) {
    1210           0 :                                 uint64_t buffer_len = len;
    1211           0 :                                 uint8_t *va = vaddr;
    1212             :                                 enum rte_iova_mode iova_mode;
    1213             : 
    1214           0 :                                 iova_mode = rte_eal_iova_mode();
    1215             :                                 /*
    1216             :                                  * In virtual address mode, the region is contiguous and can be done in
    1217             :                                  * one unmap.
    1218             :                                  */
    1219           0 :                                 if (iova_mode == RTE_IOVA_VA) {
    1220           0 :                                         paddr = spdk_mem_map_translate(map, (uint64_t)va, &buffer_len);
    1221           0 :                                         if (buffer_len != len || paddr != (uintptr_t)va) {
    1222           0 :                                                 DEBUG_PRINT("Unmapping %p with length %lu failed because "
    1223             :                                                             "translation had address 0x%" PRIx64 " and length %lu\n",
    1224             :                                                             va, len, paddr, buffer_len);
    1225           0 :                                                 return -EINVAL;
    1226             :                                         }
    1227           0 :                                         rc = vtophys_iommu_unmap_dma(paddr, len);
    1228           0 :                                         if (rc) {
    1229           0 :                                                 DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1230           0 :                                                 return -EFAULT;
    1231             :                                         }
    1232           0 :                                 } else if (iova_mode == RTE_IOVA_PA) {
    1233             :                                         /* Get paddr for each 2MB chunk in this address range */
    1234           0 :                                         while (buffer_len > 0) {
    1235           0 :                                                 paddr = spdk_mem_map_translate(map, (uint64_t)va, NULL);
    1236             : 
    1237           0 :                                                 if (paddr == SPDK_VTOPHYS_ERROR || buffer_len < VALUE_2MB) {
    1238           0 :                                                         DEBUG_PRINT("could not get phys addr for %p\n", va);
    1239           0 :                                                         return -EFAULT;
    1240             :                                                 }
    1241             : 
    1242           0 :                                                 rc = vtophys_iommu_unmap_dma(paddr, VALUE_2MB);
    1243           0 :                                                 if (rc) {
    1244           0 :                                                         DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1245           0 :                                                         return -EFAULT;
    1246             :                                                 }
    1247             : 
    1248           0 :                                                 va += VALUE_2MB;
    1249           0 :                                                 buffer_len -= VALUE_2MB;
    1250             :                                         }
    1251             :                                 }
    1252             :                         }
    1253             :                 }
    1254             : #endif
    1255           0 :                 while (len > 0) {
    1256           0 :                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1257           0 :                         if (rc != 0) {
    1258           0 :                                 return rc;
    1259             :                         }
    1260             : 
    1261           0 :                         vaddr += VALUE_2MB;
    1262           0 :                         len -= VALUE_2MB;
    1263             :                 }
    1264             : 
    1265           0 :                 break;
    1266           0 :         default:
    1267           0 :                 SPDK_UNREACHABLE();
    1268             :         }
    1269             : 
    1270           0 :         return rc;
    1271             : }
    1272             : 
    1273             : static int
    1274           0 : vtophys_check_contiguous_entries(uint64_t paddr1, uint64_t paddr2)
    1275             : {
    1276             :         /* This function is always called with paddrs for two subsequent
    1277             :          * 2MB chunks in virtual address space, so those chunks will be only
    1278             :          * physically contiguous if the physical addresses are 2MB apart
    1279             :          * from each other as well.
    1280             :          */
    1281           0 :         return (paddr2 - paddr1 == VALUE_2MB);
    1282             : }
    1283             : 
    1284             : #if VFIO_ENABLED
    1285             : 
    1286             : static bool
    1287           0 : vfio_enabled(void)
    1288             : {
    1289           0 :         return rte_vfio_is_enabled("vfio_pci");
    1290             : }
    1291             : 
    1292             : /* Check if IOMMU is enabled on the system */
    1293             : static bool
    1294           0 : has_iommu_groups(void)
    1295             : {
    1296           0 :         int count = 0;
    1297           0 :         DIR *dir = opendir("/sys/kernel/iommu_groups");
    1298             : 
    1299           0 :         if (dir == NULL) {
    1300           0 :                 return false;
    1301             :         }
    1302             : 
    1303           0 :         while (count < 3 && readdir(dir) != NULL) {
    1304           0 :                 count++;
    1305             :         }
    1306             : 
    1307           0 :         closedir(dir);
    1308             :         /* there will always be ./ and ../ entries */
    1309           0 :         return count > 2;
    1310             : }
    1311             : 
    1312             : static bool
    1313           0 : vfio_noiommu_enabled(void)
    1314             : {
    1315           0 :         return rte_vfio_noiommu_is_enabled();
    1316             : }
    1317             : 
    1318             : static void
    1319           0 : vtophys_iommu_init(void)
    1320             : {
    1321           0 :         char proc_fd_path[PATH_MAX + 1];
    1322           0 :         char link_path[PATH_MAX + 1];
    1323           0 :         const char vfio_path[] = "/dev/vfio/vfio";
    1324             :         DIR *dir;
    1325             :         struct dirent *d;
    1326             : 
    1327           0 :         if (!vfio_enabled()) {
    1328           0 :                 return;
    1329             :         }
    1330             : 
    1331           0 :         if (vfio_noiommu_enabled()) {
    1332           0 :                 g_vfio.noiommu_enabled = true;
    1333           0 :         } else if (!has_iommu_groups()) {
    1334           0 :                 return;
    1335             :         }
    1336             : 
    1337           0 :         dir = opendir("/proc/self/fd");
    1338           0 :         if (!dir) {
    1339           0 :                 DEBUG_PRINT("Failed to open /proc/self/fd (%d)\n", errno);
    1340           0 :                 return;
    1341             :         }
    1342             : 
    1343           0 :         while ((d = readdir(dir)) != NULL) {
    1344           0 :                 if (d->d_type != DT_LNK) {
    1345           0 :                         continue;
    1346             :                 }
    1347             : 
    1348           0 :                 snprintf(proc_fd_path, sizeof(proc_fd_path), "/proc/self/fd/%s", d->d_name);
    1349           0 :                 if (readlink(proc_fd_path, link_path, sizeof(link_path)) != (sizeof(vfio_path) - 1)) {
    1350           0 :                         continue;
    1351             :                 }
    1352             : 
    1353           0 :                 if (memcmp(link_path, vfio_path, sizeof(vfio_path) - 1) == 0) {
    1354           0 :                         sscanf(d->d_name, "%d", &g_vfio.fd);
    1355           0 :                         break;
    1356             :                 }
    1357             :         }
    1358             : 
    1359           0 :         closedir(dir);
    1360             : 
    1361           0 :         if (g_vfio.fd < 0) {
    1362           0 :                 DEBUG_PRINT("Failed to discover DPDK VFIO container fd.\n");
    1363           0 :                 return;
    1364             :         }
    1365             : 
    1366           0 :         g_vfio.enabled = true;
    1367             : 
    1368           0 :         return;
    1369             : }
    1370             : 
    1371             : #endif
    1372             : 
    1373             : void
    1374           0 : vtophys_pci_device_added(struct rte_pci_device *pci_device)
    1375             : {
    1376             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1377             : 
    1378           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1379             : 
    1380           0 :         vtophys_dev = calloc(1, sizeof(*vtophys_dev));
    1381           0 :         if (vtophys_dev) {
    1382           0 :                 vtophys_dev->pci_device = pci_device;
    1383           0 :                 TAILQ_INSERT_TAIL(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1384             :         } else {
    1385           0 :                 DEBUG_PRINT("Memory allocation error\n");
    1386             :         }
    1387           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1388             : 
    1389             : #if VFIO_ENABLED
    1390             :         struct spdk_vfio_dma_map *dma_map;
    1391             :         int ret;
    1392             : 
    1393           0 :         if (!g_vfio.enabled) {
    1394           0 :                 return;
    1395             :         }
    1396             : 
    1397           0 :         pthread_mutex_lock(&g_vfio.mutex);
    1398           0 :         g_vfio.device_ref++;
    1399           0 :         if (g_vfio.device_ref > 1) {
    1400           0 :                 pthread_mutex_unlock(&g_vfio.mutex);
    1401           0 :                 return;
    1402             :         }
    1403             : 
    1404             :         /* This is the first SPDK device using DPDK vfio. This means that the first
    1405             :          * IOMMU group might have been just been added to the DPDK vfio container.
    1406             :          * From this point it is certain that the memory can be mapped now.
    1407             :          */
    1408           0 :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1409           0 :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
    1410           0 :                 if (ret) {
    1411           0 :                         DEBUG_PRINT("Cannot update DMA mapping, error %d\n", errno);
    1412           0 :                         break;
    1413             :                 }
    1414             :         }
    1415           0 :         pthread_mutex_unlock(&g_vfio.mutex);
    1416             : #endif
    1417             : }
    1418             : 
    1419             : void
    1420           0 : vtophys_pci_device_removed(struct rte_pci_device *pci_device)
    1421             : {
    1422             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1423             : 
    1424           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1425           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1426           0 :                 if (vtophys_dev->pci_device == pci_device) {
    1427           0 :                         TAILQ_REMOVE(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1428           0 :                         free(vtophys_dev);
    1429           0 :                         break;
    1430             :                 }
    1431             :         }
    1432           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1433             : 
    1434             : #if VFIO_ENABLED
    1435             :         struct spdk_vfio_dma_map *dma_map;
    1436             :         int ret;
    1437             : 
    1438           0 :         if (!g_vfio.enabled) {
    1439           0 :                 return;
    1440             :         }
    1441             : 
    1442           0 :         pthread_mutex_lock(&g_vfio.mutex);
    1443           0 :         assert(g_vfio.device_ref > 0);
    1444           0 :         g_vfio.device_ref--;
    1445           0 :         if (g_vfio.device_ref > 0) {
    1446           0 :                 pthread_mutex_unlock(&g_vfio.mutex);
    1447           0 :                 return;
    1448             :         }
    1449             : 
    1450             :         /* This is the last SPDK device using DPDK vfio. If DPDK doesn't have
    1451             :          * any additional devices using it's vfio container, all the mappings
    1452             :          * will be automatically removed by the Linux vfio driver. We unmap
    1453             :          * the memory manually to be able to easily re-map it later regardless
    1454             :          * of other, external factors.
    1455             :          */
    1456           0 :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1457           0 :                 struct vfio_iommu_type1_dma_unmap unmap = {};
    1458           0 :                 unmap.argsz = sizeof(unmap);
    1459           0 :                 unmap.flags = 0;
    1460           0 :                 unmap.iova = dma_map->map.iova;
    1461           0 :                 unmap.size = dma_map->map.size;
    1462           0 :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
    1463           0 :                 if (ret) {
    1464           0 :                         DEBUG_PRINT("Cannot unmap DMA memory, error %d\n", errno);
    1465           0 :                         break;
    1466             :                 }
    1467             :         }
    1468           0 :         pthread_mutex_unlock(&g_vfio.mutex);
    1469             : #endif
    1470             : }
    1471             : 
    1472             : int
    1473           0 : vtophys_init(void)
    1474             : {
    1475           0 :         const struct spdk_mem_map_ops vtophys_map_ops = {
    1476             :                 .notify_cb = vtophys_notify,
    1477             :                 .are_contiguous = vtophys_check_contiguous_entries,
    1478             :         };
    1479             : 
    1480           0 :         const struct spdk_mem_map_ops phys_ref_map_ops = {
    1481             :                 .notify_cb = NULL,
    1482             :                 .are_contiguous = NULL,
    1483             :         };
    1484             : 
    1485             : #if VFIO_ENABLED
    1486           0 :         vtophys_iommu_init();
    1487             : #endif
    1488             : 
    1489           0 :         g_phys_ref_map = spdk_mem_map_alloc(0, &phys_ref_map_ops, NULL);
    1490           0 :         if (g_phys_ref_map == NULL) {
    1491           0 :                 DEBUG_PRINT("phys_ref map allocation failed.\n");
    1492           0 :                 return -ENOMEM;
    1493             :         }
    1494             : 
    1495           0 :         if (g_huge_pages) {
    1496           0 :                 g_vtophys_map = spdk_mem_map_alloc(SPDK_VTOPHYS_ERROR, &vtophys_map_ops, NULL);
    1497           0 :                 if (g_vtophys_map == NULL) {
    1498           0 :                         DEBUG_PRINT("vtophys map allocation failed\n");
    1499           0 :                         spdk_mem_map_free(&g_phys_ref_map);
    1500           0 :                         return -ENOMEM;
    1501             :                 }
    1502             :         }
    1503           0 :         return 0;
    1504             : }
    1505             : 
    1506             : uint64_t
    1507           0 : spdk_vtophys(const void *buf, uint64_t *size)
    1508             : {
    1509             :         uint64_t vaddr, paddr_2mb;
    1510             : 
    1511           0 :         if (!g_huge_pages) {
    1512           0 :                 return SPDK_VTOPHYS_ERROR;
    1513             :         }
    1514             : 
    1515           0 :         vaddr = (uint64_t)buf;
    1516           0 :         paddr_2mb = spdk_mem_map_translate(g_vtophys_map, vaddr, size);
    1517             : 
    1518             :         /*
    1519             :          * SPDK_VTOPHYS_ERROR has all bits set, so if the lookup returned SPDK_VTOPHYS_ERROR,
    1520             :          * we will still bitwise-or it with the buf offset below, but the result will still be
    1521             :          * SPDK_VTOPHYS_ERROR. However now that we do + rather than | (due to PCI vtophys being
    1522             :          * unaligned) we must now check the return value before addition.
    1523             :          */
    1524             :         SPDK_STATIC_ASSERT(SPDK_VTOPHYS_ERROR == UINT64_C(-1), "SPDK_VTOPHYS_ERROR should be all 1s");
    1525           0 :         if (paddr_2mb == SPDK_VTOPHYS_ERROR) {
    1526           0 :                 return SPDK_VTOPHYS_ERROR;
    1527             :         } else {
    1528           0 :                 return paddr_2mb + (vaddr & MASK_2MB);
    1529             :         }
    1530             : }
    1531             : 
    1532             : int
    1533           0 : spdk_mem_get_fd_and_offset(void *vaddr, uint64_t *offset)
    1534             : {
    1535             :         struct rte_memseg *seg;
    1536             :         int ret, fd;
    1537             : 
    1538           0 :         seg = rte_mem_virt2memseg(vaddr, NULL);
    1539           0 :         if (!seg) {
    1540           0 :                 SPDK_ERRLOG("memory %p doesn't exist\n", vaddr);
    1541           0 :                 return -ENOENT;
    1542             :         }
    1543             : 
    1544           0 :         fd = rte_memseg_get_fd_thread_unsafe(seg);
    1545           0 :         if (fd < 0) {
    1546           0 :                 return fd;
    1547             :         }
    1548             : 
    1549           0 :         ret = rte_memseg_get_fd_offset_thread_unsafe(seg, offset);
    1550           0 :         if (ret < 0) {
    1551           0 :                 return ret;
    1552             :         }
    1553             : 
    1554           0 :         return fd;
    1555             : }
    1556             : 
    1557             : void
    1558           0 : mem_disable_huge_pages(void)
    1559             : {
    1560           0 :         g_huge_pages = false;
    1561           0 : }

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