LCOV - code coverage report
Current view: top level - lib/env_dpdk - memory.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 576 0.0 %
Date: 2024-12-09 04:56:07 Functions: 0 30 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             : static bool g_mem_event_cb_registered = false;
     122             : 
     123             : /*
     124             :  * Walk the currently registered memory via the main memory registration map
     125             :  * and call the new map's notify callback for each virtually contiguous region.
     126             :  */
     127             : static int
     128           0 : mem_map_notify_walk(struct spdk_mem_map *map, enum spdk_mem_map_notify_action action)
     129             : {
     130             :         size_t idx_256tb;
     131             :         uint64_t idx_1gb;
     132           0 :         uint64_t contig_start = UINT64_MAX;
     133           0 :         uint64_t contig_end = UINT64_MAX;
     134             :         struct map_1gb *map_1gb;
     135             :         int rc;
     136             : 
     137           0 :         if (!g_mem_reg_map) {
     138           0 :                 return -EINVAL;
     139             :         }
     140             : 
     141             :         /* Hold the memory registration map mutex so no new registrations can be added while we are looping. */
     142           0 :         pthread_mutex_lock(&g_mem_reg_map->mutex);
     143             : 
     144           0 :         for (idx_256tb = 0;
     145           0 :              idx_256tb < sizeof(g_mem_reg_map->map_256tb.map) / sizeof(g_mem_reg_map->map_256tb.map[0]);
     146           0 :              idx_256tb++) {
     147           0 :                 map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
     148             : 
     149           0 :                 if (!map_1gb) {
     150           0 :                         if (contig_start != UINT64_MAX) {
     151             :                                 /* End of of a virtually contiguous range */
     152           0 :                                 rc = map->ops.notify_cb(map->cb_ctx, map, action,
     153           0 :                                                         (void *)contig_start,
     154           0 :                                                         contig_end - contig_start + VALUE_2MB);
     155             :                                 /* Don't bother handling unregister failures. It can't be any worse */
     156           0 :                                 if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
     157           0 :                                         goto err_unregister;
     158             :                                 }
     159           0 :                         }
     160           0 :                         contig_start = UINT64_MAX;
     161           0 :                         continue;
     162             :                 }
     163             : 
     164           0 :                 for (idx_1gb = 0; idx_1gb < sizeof(map_1gb->map) / sizeof(map_1gb->map[0]); idx_1gb++) {
     165           0 :                         if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
     166           0 :                             (contig_start == UINT64_MAX ||
     167           0 :                              (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
     168             :                                 /* Rebuild the virtual address from the indexes */
     169           0 :                                 uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
     170             : 
     171           0 :                                 if (contig_start == UINT64_MAX) {
     172           0 :                                         contig_start = vaddr;
     173           0 :                                 }
     174             : 
     175           0 :                                 contig_end = vaddr;
     176           0 :                         } else {
     177           0 :                                 if (contig_start != UINT64_MAX) {
     178             :                                         /* End of of a virtually contiguous range */
     179           0 :                                         rc = map->ops.notify_cb(map->cb_ctx, map, action,
     180           0 :                                                                 (void *)contig_start,
     181           0 :                                                                 contig_end - contig_start + VALUE_2MB);
     182             :                                         /* Don't bother handling unregister failures. It can't be any worse */
     183           0 :                                         if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
     184           0 :                                                 goto err_unregister;
     185             :                                         }
     186             : 
     187             :                                         /* This page might be a part of a neighbour region, so process
     188             :                                          * it again. The idx_1gb will be incremented immediately.
     189             :                                          */
     190           0 :                                         idx_1gb--;
     191           0 :                                 }
     192           0 :                                 contig_start = UINT64_MAX;
     193             :                         }
     194           0 :                 }
     195           0 :         }
     196             : 
     197           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     198           0 :         return 0;
     199             : 
     200             : err_unregister:
     201             :         /* Unwind to the first empty translation so we don't unregister
     202             :          * a region that just failed to register.
     203             :          */
     204           0 :         idx_256tb = MAP_256TB_IDX((contig_start >> SHIFT_2MB) - 1);
     205           0 :         idx_1gb = MAP_1GB_IDX((contig_start >> SHIFT_2MB) - 1);
     206           0 :         contig_start = UINT64_MAX;
     207           0 :         contig_end = UINT64_MAX;
     208             : 
     209             :         /* Unregister any memory we managed to register before the failure */
     210           0 :         for (; idx_256tb < SIZE_MAX; idx_256tb--) {
     211           0 :                 map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
     212             : 
     213           0 :                 if (!map_1gb) {
     214           0 :                         if (contig_end != UINT64_MAX) {
     215             :                                 /* End of of a virtually contiguous range */
     216           0 :                                 map->ops.notify_cb(map->cb_ctx, map,
     217             :                                                    SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     218           0 :                                                    (void *)contig_start,
     219           0 :                                                    contig_end - contig_start + VALUE_2MB);
     220           0 :                         }
     221           0 :                         contig_end = UINT64_MAX;
     222           0 :                         continue;
     223             :                 }
     224             : 
     225           0 :                 for (; idx_1gb < UINT64_MAX; idx_1gb--) {
     226             :                         /* Rebuild the virtual address from the indexes */
     227           0 :                         uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
     228           0 :                         if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
     229           0 :                             (contig_end == UINT64_MAX || (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
     230             : 
     231           0 :                                 if (contig_end == UINT64_MAX) {
     232           0 :                                         contig_end = vaddr;
     233           0 :                                 }
     234           0 :                                 contig_start = vaddr;
     235           0 :                         } else {
     236           0 :                                 if (contig_end != UINT64_MAX) {
     237           0 :                                         if (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) {
     238           0 :                                                 contig_start = vaddr;
     239           0 :                                         }
     240             :                                         /* End of of a virtually contiguous range */
     241           0 :                                         map->ops.notify_cb(map->cb_ctx, map,
     242             :                                                            SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     243           0 :                                                            (void *)contig_start,
     244           0 :                                                            contig_end - contig_start + VALUE_2MB);
     245           0 :                                 }
     246           0 :                                 contig_end = UINT64_MAX;
     247             :                         }
     248           0 :                 }
     249           0 :                 idx_1gb = sizeof(map_1gb->map) / sizeof(map_1gb->map[0]) - 1;
     250           0 :         }
     251             : 
     252           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     253           0 :         return rc;
     254           0 : }
     255             : 
     256             : struct spdk_mem_map *
     257           0 : spdk_mem_map_alloc(uint64_t default_translation, const struct spdk_mem_map_ops *ops, void *cb_ctx)
     258             : {
     259             :         struct spdk_mem_map *map;
     260             :         int rc;
     261             :         size_t i;
     262             : 
     263           0 :         map = calloc(1, sizeof(*map));
     264           0 :         if (map == NULL) {
     265           0 :                 return NULL;
     266             :         }
     267             : 
     268           0 :         if (pthread_mutex_init(&map->mutex, NULL)) {
     269           0 :                 free(map);
     270           0 :                 return NULL;
     271             :         }
     272             : 
     273           0 :         map->default_translation = default_translation;
     274           0 :         map->cb_ctx = cb_ctx;
     275           0 :         if (ops) {
     276           0 :                 map->ops = *ops;
     277           0 :         }
     278             : 
     279           0 :         if (ops && ops->notify_cb) {
     280           0 :                 pthread_mutex_lock(&g_spdk_mem_map_mutex);
     281           0 :                 rc = mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_REGISTER);
     282           0 :                 if (rc != 0) {
     283           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     284           0 :                         DEBUG_PRINT("Initial mem_map notify failed\n");
     285           0 :                         pthread_mutex_destroy(&map->mutex);
     286           0 :                         for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
     287           0 :                                 free(map->map_256tb.map[i]);
     288           0 :                         }
     289           0 :                         free(map);
     290           0 :                         return NULL;
     291             :                 }
     292           0 :                 TAILQ_INSERT_TAIL(&g_spdk_mem_maps, map, tailq);
     293           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     294           0 :         }
     295             : 
     296           0 :         return map;
     297           0 : }
     298             : 
     299             : void
     300           0 : spdk_mem_map_free(struct spdk_mem_map **pmap)
     301             : {
     302             :         struct spdk_mem_map *map;
     303             :         size_t i;
     304             : 
     305           0 :         if (!pmap) {
     306           0 :                 return;
     307             :         }
     308             : 
     309           0 :         map = *pmap;
     310             : 
     311           0 :         if (!map) {
     312           0 :                 return;
     313             :         }
     314             : 
     315           0 :         if (map->ops.notify_cb) {
     316           0 :                 pthread_mutex_lock(&g_spdk_mem_map_mutex);
     317           0 :                 mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_UNREGISTER);
     318           0 :                 TAILQ_REMOVE(&g_spdk_mem_maps, map, tailq);
     319           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     320           0 :         }
     321             : 
     322           0 :         for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
     323           0 :                 free(map->map_256tb.map[i]);
     324           0 :         }
     325             : 
     326           0 :         pthread_mutex_destroy(&map->mutex);
     327             : 
     328           0 :         free(map);
     329           0 :         *pmap = NULL;
     330           0 : }
     331             : 
     332             : int
     333           0 : spdk_mem_register(void *_vaddr, size_t len)
     334             : {
     335             :         struct spdk_mem_map *map;
     336             :         int rc;
     337           0 :         uint64_t vaddr = (uintptr_t)_vaddr;
     338             :         uint64_t seg_vaddr;
     339             :         size_t seg_len;
     340             :         uint64_t reg;
     341             : 
     342           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     343           0 :                 DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
     344           0 :                 return -EINVAL;
     345             :         }
     346             : 
     347           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     348           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
     349             :                             __func__, vaddr, len);
     350           0 :                 return -EINVAL;
     351             :         }
     352             : 
     353           0 :         if (len == 0) {
     354           0 :                 return 0;
     355             :         }
     356             : 
     357           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     358             : 
     359           0 :         seg_vaddr = vaddr;
     360           0 :         seg_len = len;
     361           0 :         while (seg_len > 0) {
     362           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     363           0 :                 if (reg & REG_MAP_REGISTERED) {
     364           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     365           0 :                         return -EBUSY;
     366             :                 }
     367           0 :                 seg_vaddr += VALUE_2MB;
     368           0 :                 seg_len -= VALUE_2MB;
     369             :         }
     370             : 
     371           0 :         seg_vaddr = vaddr;
     372           0 :         seg_len = 0;
     373           0 :         while (len > 0) {
     374           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB,
     375           0 :                                              seg_len == 0 ? REG_MAP_REGISTERED | REG_MAP_NOTIFY_START : REG_MAP_REGISTERED);
     376           0 :                 seg_len += VALUE_2MB;
     377           0 :                 vaddr += VALUE_2MB;
     378           0 :                 len -= VALUE_2MB;
     379             :         }
     380             : 
     381           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     382           0 :                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER,
     383           0 :                                         (void *)seg_vaddr, seg_len);
     384           0 :                 if (rc != 0) {
     385           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     386           0 :                         return rc;
     387             :                 }
     388           0 :         }
     389             : 
     390           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     391           0 :         return 0;
     392           0 : }
     393             : 
     394             : int
     395           0 : spdk_mem_unregister(void *_vaddr, size_t len)
     396             : {
     397             :         struct spdk_mem_map *map;
     398             :         int rc;
     399           0 :         uint64_t vaddr = (uintptr_t)_vaddr;
     400             :         uint64_t seg_vaddr;
     401             :         size_t seg_len;
     402             :         uint64_t reg, newreg;
     403             : 
     404           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     405           0 :                 DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
     406           0 :                 return -EINVAL;
     407             :         }
     408             : 
     409           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     410           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
     411             :                             __func__, vaddr, len);
     412           0 :                 return -EINVAL;
     413             :         }
     414             : 
     415           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     416             : 
     417             :         /* The first page must be a start of a region. Also check if it's
     418             :          * registered to make sure we don't return -ERANGE for non-registered
     419             :          * regions.
     420             :          */
     421           0 :         reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     422           0 :         if ((reg & REG_MAP_REGISTERED) && (reg & REG_MAP_NOTIFY_START) == 0) {
     423           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     424           0 :                 return -ERANGE;
     425             :         }
     426             : 
     427           0 :         seg_vaddr = vaddr;
     428           0 :         seg_len = len;
     429           0 :         while (seg_len > 0) {
     430           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     431           0 :                 if ((reg & REG_MAP_REGISTERED) == 0) {
     432           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     433           0 :                         return -EINVAL;
     434             :                 }
     435           0 :                 seg_vaddr += VALUE_2MB;
     436           0 :                 seg_len -= VALUE_2MB;
     437             :         }
     438             : 
     439           0 :         newreg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     440             :         /* If the next page is registered, it must be a start of a region as well,
     441             :          * otherwise we'd be unregistering only a part of a region.
     442             :          */
     443           0 :         if ((newreg & REG_MAP_NOTIFY_START) == 0 && (newreg & REG_MAP_REGISTERED)) {
     444           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     445           0 :                 return -ERANGE;
     446             :         }
     447           0 :         seg_vaddr = vaddr;
     448           0 :         seg_len = 0;
     449             : 
     450           0 :         while (len > 0) {
     451           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     452           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB, 0);
     453             : 
     454           0 :                 if (seg_len > 0 && (reg & REG_MAP_NOTIFY_START)) {
     455           0 :                         TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     456           0 :                                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     457           0 :                                                         (void *)seg_vaddr, seg_len);
     458           0 :                                 if (rc != 0) {
     459           0 :                                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     460           0 :                                         return rc;
     461             :                                 }
     462           0 :                         }
     463             : 
     464           0 :                         seg_vaddr = vaddr;
     465           0 :                         seg_len = VALUE_2MB;
     466           0 :                 } else {
     467           0 :                         seg_len += VALUE_2MB;
     468             :                 }
     469             : 
     470           0 :                 vaddr += VALUE_2MB;
     471           0 :                 len -= VALUE_2MB;
     472             :         }
     473             : 
     474           0 :         if (seg_len > 0) {
     475           0 :                 TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     476           0 :                         rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     477           0 :                                                 (void *)seg_vaddr, seg_len);
     478           0 :                         if (rc != 0) {
     479           0 :                                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     480           0 :                                 return rc;
     481             :                         }
     482           0 :                 }
     483           0 :         }
     484             : 
     485           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     486           0 :         return 0;
     487           0 : }
     488             : 
     489             : int
     490           0 : spdk_mem_reserve(void *vaddr, size_t len)
     491             : {
     492             :         struct spdk_mem_map *map;
     493             :         void *seg_vaddr;
     494             :         size_t seg_len;
     495             :         uint64_t reg;
     496             : 
     497           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     498           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
     499           0 :                 return -EINVAL;
     500             :         }
     501             : 
     502           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     503           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
     504             :                             __func__, vaddr, len);
     505           0 :                 return -EINVAL;
     506             :         }
     507             : 
     508           0 :         if (len == 0) {
     509           0 :                 return 0;
     510             :         }
     511             : 
     512           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     513             : 
     514             :         /* Check if any part of this range is already registered */
     515           0 :         seg_vaddr = vaddr;
     516           0 :         seg_len = len;
     517           0 :         while (seg_len > 0) {
     518           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     519           0 :                 if (reg & REG_MAP_REGISTERED) {
     520           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     521           0 :                         return -EBUSY;
     522             :                 }
     523           0 :                 seg_vaddr += VALUE_2MB;
     524           0 :                 seg_len -= VALUE_2MB;
     525             :         }
     526             : 
     527             :         /* Simply set the translation to the memory map's default. This allocates the space in the
     528             :          * map but does not provide a valid translation. */
     529           0 :         spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, len,
     530           0 :                                      g_mem_reg_map->default_translation);
     531             : 
     532           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     533           0 :                 spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, map->default_translation);
     534           0 :         }
     535             : 
     536           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     537           0 :         return 0;
     538           0 : }
     539             : 
     540             : static struct map_1gb *
     541           0 : mem_map_get_map_1gb(struct spdk_mem_map *map, uint64_t vfn_2mb)
     542             : {
     543             :         struct map_1gb *map_1gb;
     544           0 :         uint64_t idx_256tb = MAP_256TB_IDX(vfn_2mb);
     545             :         size_t i;
     546             : 
     547           0 :         if (spdk_unlikely(idx_256tb >= SPDK_COUNTOF(map->map_256tb.map))) {
     548           0 :                 return NULL;
     549             :         }
     550             : 
     551           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     552             : 
     553           0 :         if (!map_1gb) {
     554           0 :                 pthread_mutex_lock(&map->mutex);
     555             : 
     556             :                 /* Recheck to make sure nobody else got the mutex first. */
     557           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     558           0 :                 if (!map_1gb) {
     559           0 :                         map_1gb = malloc(sizeof(struct map_1gb));
     560           0 :                         if (map_1gb) {
     561             :                                 /* initialize all entries to default translation */
     562           0 :                                 for (i = 0; i < SPDK_COUNTOF(map_1gb->map); i++) {
     563           0 :                                         map_1gb->map[i].translation_2mb = map->default_translation;
     564           0 :                                 }
     565           0 :                                 map->map_256tb.map[idx_256tb] = map_1gb;
     566           0 :                         }
     567           0 :                 }
     568             : 
     569           0 :                 pthread_mutex_unlock(&map->mutex);
     570             : 
     571           0 :                 if (!map_1gb) {
     572           0 :                         DEBUG_PRINT("allocation failed\n");
     573           0 :                         return NULL;
     574             :                 }
     575           0 :         }
     576             : 
     577           0 :         return map_1gb;
     578           0 : }
     579             : 
     580             : int
     581           0 : spdk_mem_map_set_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size,
     582             :                              uint64_t translation)
     583             : {
     584             :         uint64_t vfn_2mb;
     585             :         struct map_1gb *map_1gb;
     586             :         uint64_t idx_1gb;
     587             :         struct map_2mb *map_2mb;
     588             : 
     589           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     590           0 :                 DEBUG_PRINT("invalid usermode virtual address %" PRIu64 "\n", vaddr);
     591           0 :                 return -EINVAL;
     592             :         }
     593             : 
     594             :         /* For now, only 2 MB-aligned registrations are supported */
     595           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (size & MASK_2MB)) {
     596           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%" PRIu64 " len=%" PRIu64 "\n",
     597             :                             __func__, vaddr, size);
     598           0 :                 return -EINVAL;
     599             :         }
     600             : 
     601           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     602             : 
     603           0 :         while (size) {
     604           0 :                 map_1gb = mem_map_get_map_1gb(map, vfn_2mb);
     605           0 :                 if (!map_1gb) {
     606           0 :                         DEBUG_PRINT("could not get %p map\n", (void *)vaddr);
     607           0 :                         return -ENOMEM;
     608             :                 }
     609             : 
     610           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     611           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     612           0 :                 map_2mb->translation_2mb = translation;
     613             : 
     614           0 :                 size -= VALUE_2MB;
     615           0 :                 vfn_2mb++;
     616             :         }
     617             : 
     618           0 :         return 0;
     619           0 : }
     620             : 
     621             : int
     622           0 : spdk_mem_map_clear_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size)
     623             : {
     624           0 :         return spdk_mem_map_set_translation(map, vaddr, size, map->default_translation);
     625             : }
     626             : 
     627             : inline uint64_t
     628           0 : spdk_mem_map_translate(const struct spdk_mem_map *map, uint64_t vaddr, uint64_t *size)
     629             : {
     630             :         const struct map_1gb *map_1gb;
     631             :         const struct map_2mb *map_2mb;
     632             :         uint64_t idx_256tb;
     633             :         uint64_t idx_1gb;
     634             :         uint64_t vfn_2mb;
     635             :         uint64_t cur_size;
     636             :         uint64_t prev_translation;
     637             :         uint64_t orig_translation;
     638             : 
     639           0 :         if (spdk_unlikely(vaddr & ~MASK_256TB)) {
     640           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", (void *)vaddr);
     641           0 :                 return map->default_translation;
     642             :         }
     643             : 
     644           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     645           0 :         idx_256tb = MAP_256TB_IDX(vfn_2mb);
     646           0 :         idx_1gb = MAP_1GB_IDX(vfn_2mb);
     647             : 
     648           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     649           0 :         if (spdk_unlikely(!map_1gb)) {
     650           0 :                 return map->default_translation;
     651             :         }
     652             : 
     653           0 :         cur_size = VALUE_2MB - _2MB_OFFSET(vaddr);
     654           0 :         map_2mb = &map_1gb->map[idx_1gb];
     655           0 :         if (size == NULL || map->ops.are_contiguous == NULL ||
     656           0 :             map_2mb->translation_2mb == map->default_translation) {
     657           0 :                 if (size != NULL) {
     658           0 :                         *size = spdk_min(*size, cur_size);
     659           0 :                 }
     660           0 :                 return map_2mb->translation_2mb;
     661             :         }
     662             : 
     663           0 :         orig_translation = map_2mb->translation_2mb;
     664           0 :         prev_translation = orig_translation;
     665           0 :         while (cur_size < *size) {
     666           0 :                 vfn_2mb++;
     667           0 :                 idx_256tb = MAP_256TB_IDX(vfn_2mb);
     668           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     669             : 
     670           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     671           0 :                 if (spdk_unlikely(!map_1gb)) {
     672           0 :                         break;
     673             :                 }
     674             : 
     675           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     676           0 :                 if (!map->ops.are_contiguous(prev_translation, map_2mb->translation_2mb)) {
     677           0 :                         break;
     678             :                 }
     679             : 
     680           0 :                 cur_size += VALUE_2MB;
     681           0 :                 prev_translation = map_2mb->translation_2mb;
     682             :         }
     683             : 
     684           0 :         *size = spdk_min(*size, cur_size);
     685           0 :         return orig_translation;
     686           0 : }
     687             : 
     688             : static void
     689           0 : memory_hotplug_cb(enum rte_mem_event event_type,
     690             :                   const void *addr, size_t len, void *arg)
     691             : {
     692           0 :         if (event_type == RTE_MEM_EVENT_ALLOC) {
     693           0 :                 spdk_mem_register((void *)addr, len);
     694             : 
     695           0 :                 if (!spdk_env_dpdk_external_init()) {
     696           0 :                         return;
     697             :                 }
     698             : 
     699             :                 /* When the user initialized DPDK separately, we can't
     700             :                  * be sure that --match-allocations RTE flag was specified.
     701             :                  * Without this flag, DPDK can free memory in different units
     702             :                  * than it was allocated. It doesn't work with things like RDMA MRs.
     703             :                  *
     704             :                  * For such cases, we mark segments so they aren't freed.
     705             :                  */
     706           0 :                 while (len > 0) {
     707             :                         struct rte_memseg *seg;
     708             : 
     709           0 :                         seg = rte_mem_virt2memseg(addr, NULL);
     710           0 :                         assert(seg != NULL);
     711           0 :                         seg->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
     712           0 :                         addr = (void *)((uintptr_t)addr + seg->hugepage_sz);
     713           0 :                         len -= seg->hugepage_sz;
     714             :                 }
     715           0 :         } else if (event_type == RTE_MEM_EVENT_FREE) {
     716           0 :                 spdk_mem_unregister((void *)addr, len);
     717           0 :         }
     718           0 : }
     719             : 
     720             : static int
     721           0 : memory_iter_cb(const struct rte_memseg_list *msl,
     722             :                const struct rte_memseg *ms, size_t len, void *arg)
     723             : {
     724           0 :         return spdk_mem_register(ms->addr, len);
     725             : }
     726             : 
     727             : int
     728           0 : mem_map_init(bool legacy_mem)
     729             : {
     730             :         int rc;
     731             : 
     732           0 :         g_legacy_mem = legacy_mem;
     733             : 
     734           0 :         g_mem_reg_map = spdk_mem_map_alloc(0, NULL, NULL);
     735           0 :         if (g_mem_reg_map == NULL) {
     736           0 :                 DEBUG_PRINT("memory registration map allocation failed\n");
     737           0 :                 return -ENOMEM;
     738             :         }
     739             : 
     740           0 :         if (!g_huge_pages) {
     741           0 :                 return 0;
     742             :         }
     743             : 
     744           0 :         rc = rte_mem_event_callback_register("spdk", memory_hotplug_cb, NULL);
     745           0 :         if (rc != 0) {
     746           0 :                 DEBUG_PRINT("memory event callback registration failed, rc = %d\n", rc);
     747           0 :                 goto err_free_reg_map;
     748             :         }
     749           0 :         g_mem_event_cb_registered = true;
     750             : 
     751             :         /*
     752             :          * Walk all DPDK memory segments and register them
     753             :          * with the main memory map
     754             :          */
     755           0 :         rc = rte_memseg_contig_walk(memory_iter_cb, NULL);
     756           0 :         if (rc != 0) {
     757           0 :                 DEBUG_PRINT("memory segments walking failed, rc = %d\n", rc);
     758           0 :                 goto err_unregister_mem_cb;
     759             :         }
     760             : 
     761           0 :         return 0;
     762             : 
     763             : err_unregister_mem_cb:
     764           0 :         g_mem_event_cb_registered = false;
     765           0 :         rte_mem_event_callback_unregister("spdk", NULL);
     766             : err_free_reg_map:
     767           0 :         spdk_mem_map_free(&g_mem_reg_map);
     768           0 :         return rc;
     769           0 : }
     770             : 
     771             : void
     772           0 : mem_map_fini(void)
     773             : {
     774           0 :         if (g_mem_event_cb_registered) {
     775           0 :                 g_mem_event_cb_registered = false;
     776           0 :                 rte_mem_event_callback_unregister("spdk", NULL);
     777           0 :         }
     778           0 :         spdk_mem_map_free(&g_mem_reg_map);
     779           0 : }
     780             : 
     781             : bool
     782           0 : spdk_iommu_is_enabled(void)
     783             : {
     784             : #if VFIO_ENABLED
     785             :         return g_vfio.enabled && !g_vfio.noiommu_enabled;
     786             : #else
     787           0 :         return false;
     788             : #endif
     789             : }
     790             : 
     791             : struct spdk_vtophys_pci_device {
     792             :         struct rte_pci_device *pci_device;
     793             :         TAILQ_ENTRY(spdk_vtophys_pci_device) tailq;
     794             : };
     795             : 
     796             : static pthread_mutex_t g_vtophys_pci_devices_mutex = PTHREAD_MUTEX_INITIALIZER;
     797             : static TAILQ_HEAD(, spdk_vtophys_pci_device) g_vtophys_pci_devices =
     798             :         TAILQ_HEAD_INITIALIZER(g_vtophys_pci_devices);
     799             : 
     800             : static struct spdk_mem_map *g_vtophys_map = NULL;
     801             : static struct spdk_mem_map *g_phys_ref_map = NULL;
     802             : static struct spdk_mem_map *g_numa_map = NULL;
     803             : 
     804             : #if VFIO_ENABLED
     805             : static int
     806             : _vfio_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     807             : {
     808             :         struct spdk_vfio_dma_map *dma_map;
     809             :         int ret;
     810             : 
     811             :         dma_map = calloc(1, sizeof(*dma_map));
     812             :         if (dma_map == NULL) {
     813             :                 return -ENOMEM;
     814             :         }
     815             : 
     816             :         dma_map->map.argsz = sizeof(dma_map->map);
     817             :         dma_map->map.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
     818             :         dma_map->map.vaddr = vaddr;
     819             :         dma_map->map.iova = iova;
     820             :         dma_map->map.size = size;
     821             : 
     822             :         if (g_vfio.device_ref == 0) {
     823             :                 /* VFIO requires at least one device (IOMMU group) to be added to
     824             :                  * a VFIO container before it is possible to perform any IOMMU
     825             :                  * operations on that container. This memory will be mapped once
     826             :                  * the first device (IOMMU group) is hotplugged.
     827             :                  *
     828             :                  * Since the vfio container is managed internally by DPDK, it is
     829             :                  * also possible that some device is already in that container, but
     830             :                  * it's not managed by SPDK -  e.g. an NIC attached internally
     831             :                  * inside DPDK. We could map the memory straight away in such
     832             :                  * scenario, but there's no need to do it. DPDK devices clearly
     833             :                  * don't need our mappings and hence we defer the mapping
     834             :                  * unconditionally until the first SPDK-managed device is
     835             :                  * hotplugged.
     836             :                  */
     837             :                 goto out_insert;
     838             :         }
     839             : 
     840             :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
     841             :         if (ret) {
     842             :                 /* There are cases the vfio container doesn't have IOMMU group, it's safe for this case */
     843             :                 SPDK_NOTICELOG("Cannot set up DMA mapping, error %d, ignored\n", errno);
     844             :         }
     845             : 
     846             : out_insert:
     847             :         TAILQ_INSERT_TAIL(&g_vfio.maps, dma_map, tailq);
     848             :         return 0;
     849             : }
     850             : 
     851             : 
     852             : static int
     853             : vtophys_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     854             : {
     855             :         uint64_t refcount;
     856             :         int ret;
     857             : 
     858             :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     859             :         assert(refcount < UINT64_MAX);
     860             :         if (refcount > 0) {
     861             :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     862             :                 return 0;
     863             :         }
     864             : 
     865             :         pthread_mutex_lock(&g_vfio.mutex);
     866             :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     867             :         pthread_mutex_unlock(&g_vfio.mutex);
     868             :         if (ret) {
     869             :                 return ret;
     870             :         }
     871             : 
     872             :         spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     873             :         return 0;
     874             : }
     875             : 
     876             : int
     877             : vtophys_iommu_map_dma_bar(uint64_t vaddr, uint64_t iova, uint64_t size)
     878             : {
     879             :         int ret;
     880             : 
     881             :         pthread_mutex_lock(&g_vfio.mutex);
     882             :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     883             :         pthread_mutex_unlock(&g_vfio.mutex);
     884             : 
     885             :         return ret;
     886             : }
     887             : 
     888             : static int
     889             : _vfio_iommu_unmap_dma(struct spdk_vfio_dma_map *dma_map)
     890             : {
     891             :         struct vfio_iommu_type1_dma_unmap unmap = {};
     892             :         int ret;
     893             : 
     894             :         if (g_vfio.device_ref == 0) {
     895             :                 /* Memory is not mapped anymore, just remove it's references */
     896             :                 goto out_remove;
     897             :         }
     898             : 
     899             :         unmap.argsz = sizeof(unmap);
     900             :         unmap.flags = 0;
     901             :         unmap.iova = dma_map->map.iova;
     902             :         unmap.size = dma_map->map.size;
     903             :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
     904             :         if (ret) {
     905             :                 SPDK_NOTICELOG("Cannot clear DMA mapping, error %d, ignored\n", errno);
     906             :         }
     907             : 
     908             : out_remove:
     909             :         TAILQ_REMOVE(&g_vfio.maps, dma_map, tailq);
     910             :         free(dma_map);
     911             :         return 0;
     912             : }
     913             : 
     914             : static int
     915             : vtophys_iommu_unmap_dma(uint64_t iova, uint64_t size)
     916             : {
     917             :         struct spdk_vfio_dma_map *dma_map;
     918             :         uint64_t refcount;
     919             :         int ret;
     920             : 
     921             :         pthread_mutex_lock(&g_vfio.mutex);
     922             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     923             :                 if (dma_map->map.iova == iova) {
     924             :                         break;
     925             :                 }
     926             :         }
     927             : 
     928             :         if (dma_map == NULL) {
     929             :                 DEBUG_PRINT("Cannot clear DMA mapping for IOVA %"PRIx64" - it's not mapped\n", iova);
     930             :                 pthread_mutex_unlock(&g_vfio.mutex);
     931             :                 return -ENXIO;
     932             :         }
     933             : 
     934             :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     935             :         assert(refcount < UINT64_MAX);
     936             :         if (refcount > 0) {
     937             :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount - 1);
     938             :         }
     939             : 
     940             :         /* We still have outstanding references, don't clear it. */
     941             :         if (refcount > 1) {
     942             :                 pthread_mutex_unlock(&g_vfio.mutex);
     943             :                 return 0;
     944             :         }
     945             : 
     946             :         /** don't support partial or multiple-page unmap for now */
     947             :         assert(dma_map->map.size == size);
     948             : 
     949             :         ret = _vfio_iommu_unmap_dma(dma_map);
     950             :         pthread_mutex_unlock(&g_vfio.mutex);
     951             : 
     952             :         return ret;
     953             : }
     954             : 
     955             : int
     956             : vtophys_iommu_unmap_dma_bar(uint64_t vaddr)
     957             : {
     958             :         struct spdk_vfio_dma_map *dma_map;
     959             :         int ret;
     960             : 
     961             :         pthread_mutex_lock(&g_vfio.mutex);
     962             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     963             :                 if (dma_map->map.vaddr == vaddr) {
     964             :                         break;
     965             :                 }
     966             :         }
     967             : 
     968             :         if (dma_map == NULL) {
     969             :                 DEBUG_PRINT("Cannot clear DMA mapping for address %"PRIx64" - it's not mapped\n", vaddr);
     970             :                 pthread_mutex_unlock(&g_vfio.mutex);
     971             :                 return -ENXIO;
     972             :         }
     973             : 
     974             :         ret = _vfio_iommu_unmap_dma(dma_map);
     975             :         pthread_mutex_unlock(&g_vfio.mutex);
     976             :         return ret;
     977             : }
     978             : #endif
     979             : 
     980             : static uint64_t
     981           0 : vtophys_get_paddr_memseg(uint64_t vaddr)
     982             : {
     983             :         uintptr_t paddr;
     984             :         struct rte_memseg *seg;
     985             : 
     986           0 :         seg = rte_mem_virt2memseg((void *)(uintptr_t)vaddr, NULL);
     987           0 :         if (seg != NULL) {
     988           0 :                 paddr = seg->iova;
     989           0 :                 if (paddr == RTE_BAD_IOVA) {
     990           0 :                         return SPDK_VTOPHYS_ERROR;
     991             :                 }
     992           0 :                 paddr += (vaddr - (uintptr_t)seg->addr);
     993           0 :                 return paddr;
     994             :         }
     995             : 
     996           0 :         return SPDK_VTOPHYS_ERROR;
     997           0 : }
     998             : 
     999             : /* Try to get the paddr from /proc/self/pagemap */
    1000             : static uint64_t
    1001           0 : vtophys_get_paddr_pagemap(uint64_t vaddr)
    1002             : {
    1003             :         uintptr_t paddr;
    1004             : 
    1005             :         /* Silence static analyzers */
    1006           0 :         assert(vaddr != 0);
    1007           0 :         paddr = rte_mem_virt2iova((void *)vaddr);
    1008           0 :         if (paddr == RTE_BAD_IOVA) {
    1009             :                 /*
    1010             :                  * The vaddr may be valid but doesn't have a backing page
    1011             :                  * assigned yet.  Touch the page to ensure a backing page
    1012             :                  * gets assigned, then try to translate again.
    1013             :                  */
    1014           0 :                 rte_atomic64_read((rte_atomic64_t *)vaddr);
    1015           0 :                 paddr = rte_mem_virt2iova((void *)vaddr);
    1016           0 :         }
    1017           0 :         if (paddr == RTE_BAD_IOVA) {
    1018             :                 /* Unable to get to the physical address. */
    1019           0 :                 return SPDK_VTOPHYS_ERROR;
    1020             :         }
    1021             : 
    1022           0 :         return paddr;
    1023           0 : }
    1024             : 
    1025             : static uint64_t
    1026           0 : pci_device_vtophys(struct rte_pci_device *dev, uint64_t vaddr, size_t len)
    1027             : {
    1028             :         struct rte_mem_resource *res;
    1029             :         uint64_t paddr;
    1030             :         unsigned r;
    1031             : 
    1032           0 :         for (r = 0; r < PCI_MAX_RESOURCE; r++) {
    1033           0 :                 res = dpdk_pci_device_get_mem_resource(dev, r);
    1034             : 
    1035           0 :                 if (res->phys_addr == 0 || vaddr < (uint64_t)res->addr ||
    1036           0 :                     (vaddr + len) >= (uint64_t)res->addr + res->len) {
    1037           0 :                         continue;
    1038             :                 }
    1039             : 
    1040             : #if VFIO_ENABLED
    1041             :                 if (spdk_iommu_is_enabled() && rte_eal_iova_mode() == RTE_IOVA_VA) {
    1042             :                         /*
    1043             :                          * The IOMMU is on and we're using IOVA == VA. The BAR was
    1044             :                          * automatically registered when it was mapped, so just return
    1045             :                          * the virtual address here.
    1046             :                          */
    1047             :                         return vaddr;
    1048             :                 }
    1049             : #endif
    1050           0 :                 paddr = res->phys_addr + (vaddr - (uint64_t)res->addr);
    1051           0 :                 return paddr;
    1052             :         }
    1053             : 
    1054           0 :         return SPDK_VTOPHYS_ERROR;
    1055           0 : }
    1056             : 
    1057             : /* Try to get the paddr from pci devices */
    1058             : static uint64_t
    1059           0 : vtophys_get_paddr_pci(uint64_t vaddr, size_t len)
    1060             : {
    1061             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1062             :         uintptr_t paddr;
    1063             :         struct rte_pci_device   *dev;
    1064             : 
    1065           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1066           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1067           0 :                 dev = vtophys_dev->pci_device;
    1068           0 :                 paddr = pci_device_vtophys(dev, vaddr, len);
    1069           0 :                 if (paddr != SPDK_VTOPHYS_ERROR) {
    1070           0 :                         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1071           0 :                         return paddr;
    1072             :                 }
    1073           0 :         }
    1074           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1075             : 
    1076           0 :         return SPDK_VTOPHYS_ERROR;
    1077           0 : }
    1078             : 
    1079             : static int
    1080           0 : vtophys_notify(void *cb_ctx, struct spdk_mem_map *map,
    1081             :                enum spdk_mem_map_notify_action action,
    1082             :                void *vaddr, size_t len)
    1083             : {
    1084           0 :         int rc = 0;
    1085             :         uint64_t paddr;
    1086             : 
    1087           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
    1088           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
    1089           0 :                 return -EINVAL;
    1090             :         }
    1091             : 
    1092           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
    1093           0 :                 DEBUG_PRINT("invalid parameters, vaddr=%p len=%ju\n",
    1094             :                             vaddr, len);
    1095           0 :                 return -EINVAL;
    1096             :         }
    1097             : 
    1098             :         /* Get the physical address from the DPDK memsegs */
    1099           0 :         paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1100             : 
    1101           0 :         switch (action) {
    1102             :         case SPDK_MEM_MAP_NOTIFY_REGISTER:
    1103           0 :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1104             :                         /* This is not an address that DPDK is managing. */
    1105             : 
    1106             :                         /* Check if this is a PCI BAR. They need special handling */
    1107           0 :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1108           0 :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1109             :                                 /* Get paddr for each 2MB chunk in this address range */
    1110           0 :                                 while (len > 0) {
    1111           0 :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1112           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1113           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1114           0 :                                                 return -EFAULT;
    1115             :                                         }
    1116             : 
    1117           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1118           0 :                                         if (rc != 0) {
    1119           0 :                                                 return rc;
    1120             :                                         }
    1121             : 
    1122           0 :                                         vaddr += VALUE_2MB;
    1123           0 :                                         len -= VALUE_2MB;
    1124             :                                 }
    1125             : 
    1126           0 :                                 return 0;
    1127             :                         }
    1128             : 
    1129             : #if VFIO_ENABLED
    1130             :                         enum rte_iova_mode iova_mode;
    1131             : 
    1132             :                         iova_mode = rte_eal_iova_mode();
    1133             : 
    1134             :                         if (spdk_iommu_is_enabled() && iova_mode == RTE_IOVA_VA) {
    1135             :                                 /* We'll use the virtual address as the iova to match DPDK. */
    1136             :                                 paddr = (uint64_t)vaddr;
    1137             :                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, len);
    1138             :                                 if (rc) {
    1139             :                                         return -EFAULT;
    1140             :                                 }
    1141             :                                 while (len > 0) {
    1142             :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1143             :                                         if (rc != 0) {
    1144             :                                                 return rc;
    1145             :                                         }
    1146             :                                         vaddr += VALUE_2MB;
    1147             :                                         paddr += VALUE_2MB;
    1148             :                                         len -= VALUE_2MB;
    1149             :                                 }
    1150             :                         } else
    1151             : #endif
    1152             :                         {
    1153             :                                 /* Get the physical address from /proc/self/pagemap. */
    1154           0 :                                 paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1155           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1156           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1157           0 :                                         return -EFAULT;
    1158             :                                 }
    1159             : 
    1160             :                                 /* Get paddr for each 2MB chunk in this address range */
    1161           0 :                                 while (len > 0) {
    1162             :                                         /* Get the physical address from /proc/self/pagemap. */
    1163           0 :                                         paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1164             : 
    1165           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1166           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1167           0 :                                                 return -EFAULT;
    1168             :                                         }
    1169             : 
    1170           0 :                                         if (paddr & MASK_2MB) {
    1171           0 :                                                 DEBUG_PRINT("invalid paddr 0x%" PRIx64 " - must be 2MB aligned\n", paddr);
    1172           0 :                                                 return -EINVAL;
    1173             :                                         }
    1174             : #if VFIO_ENABLED
    1175             :                                         /* If the IOMMU is on, but DPDK is using iova-mode=pa, we want to register this memory
    1176             :                                          * with the IOMMU using the physical address to match. */
    1177             :                                         if (spdk_iommu_is_enabled()) {
    1178             :                                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, VALUE_2MB);
    1179             :                                                 if (rc) {
    1180             :                                                         DEBUG_PRINT("Unable to assign vaddr %p to paddr 0x%" PRIx64 "\n", vaddr, paddr);
    1181             :                                                         return -EFAULT;
    1182             :                                                 }
    1183             :                                         }
    1184             : #endif
    1185             : 
    1186           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1187           0 :                                         if (rc != 0) {
    1188           0 :                                                 return rc;
    1189             :                                         }
    1190             : 
    1191           0 :                                         vaddr += VALUE_2MB;
    1192           0 :                                         len -= VALUE_2MB;
    1193             :                                 }
    1194             :                         }
    1195           0 :                 } else {
    1196             :                         /* This is an address managed by DPDK. Just setup the translations. */
    1197           0 :                         while (len > 0) {
    1198           0 :                                 paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1199           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1200           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1201           0 :                                         return -EFAULT;
    1202             :                                 }
    1203             : 
    1204           0 :                                 rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1205           0 :                                 if (rc != 0) {
    1206           0 :                                         return rc;
    1207             :                                 }
    1208             : 
    1209           0 :                                 vaddr += VALUE_2MB;
    1210           0 :                                 len -= VALUE_2MB;
    1211             :                         }
    1212             :                 }
    1213             : 
    1214           0 :                 break;
    1215             :         case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
    1216             : #if VFIO_ENABLED
    1217             :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1218             :                         /*
    1219             :                          * This is not an address that DPDK is managing.
    1220             :                          */
    1221             : 
    1222             :                         /* Check if this is a PCI BAR. They need special handling */
    1223             :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1224             :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1225             :                                 /* Get paddr for each 2MB chunk in this address range */
    1226             :                                 while (len > 0) {
    1227             :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1228             :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1229             :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1230             :                                                 return -EFAULT;
    1231             :                                         }
    1232             : 
    1233             :                                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1234             :                                         if (rc != 0) {
    1235             :                                                 return rc;
    1236             :                                         }
    1237             : 
    1238             :                                         vaddr += VALUE_2MB;
    1239             :                                         len -= VALUE_2MB;
    1240             :                                 }
    1241             : 
    1242             :                                 return 0;
    1243             :                         }
    1244             : 
    1245             :                         /* If vfio is enabled,
    1246             :                          * we need to unmap the range from the IOMMU
    1247             :                          */
    1248             :                         if (spdk_iommu_is_enabled()) {
    1249             :                                 uint64_t buffer_len = len;
    1250             :                                 uint8_t *va = vaddr;
    1251             :                                 enum rte_iova_mode iova_mode;
    1252             : 
    1253             :                                 iova_mode = rte_eal_iova_mode();
    1254             :                                 /*
    1255             :                                  * In virtual address mode, the region is contiguous and can be done in
    1256             :                                  * one unmap.
    1257             :                                  */
    1258             :                                 if (iova_mode == RTE_IOVA_VA) {
    1259             :                                         paddr = spdk_mem_map_translate(map, (uint64_t)va, &buffer_len);
    1260             :                                         if (buffer_len != len || paddr != (uintptr_t)va) {
    1261             :                                                 DEBUG_PRINT("Unmapping %p with length %lu failed because "
    1262             :                                                             "translation had address 0x%" PRIx64 " and length %lu\n",
    1263             :                                                             va, len, paddr, buffer_len);
    1264             :                                                 return -EINVAL;
    1265             :                                         }
    1266             :                                         rc = vtophys_iommu_unmap_dma(paddr, len);
    1267             :                                         if (rc) {
    1268             :                                                 DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1269             :                                                 return -EFAULT;
    1270             :                                         }
    1271             :                                 } else if (iova_mode == RTE_IOVA_PA) {
    1272             :                                         /* Get paddr for each 2MB chunk in this address range */
    1273             :                                         while (buffer_len > 0) {
    1274             :                                                 paddr = spdk_mem_map_translate(map, (uint64_t)va, NULL);
    1275             : 
    1276             :                                                 if (paddr == SPDK_VTOPHYS_ERROR || buffer_len < VALUE_2MB) {
    1277             :                                                         DEBUG_PRINT("could not get phys addr for %p\n", va);
    1278             :                                                         return -EFAULT;
    1279             :                                                 }
    1280             : 
    1281             :                                                 rc = vtophys_iommu_unmap_dma(paddr, VALUE_2MB);
    1282             :                                                 if (rc) {
    1283             :                                                         DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1284             :                                                         return -EFAULT;
    1285             :                                                 }
    1286             : 
    1287             :                                                 va += VALUE_2MB;
    1288             :                                                 buffer_len -= VALUE_2MB;
    1289             :                                         }
    1290             :                                 }
    1291             :                         }
    1292             :                 }
    1293             : #endif
    1294           0 :                 while (len > 0) {
    1295           0 :                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1296           0 :                         if (rc != 0) {
    1297           0 :                                 return rc;
    1298             :                         }
    1299             : 
    1300           0 :                         vaddr += VALUE_2MB;
    1301           0 :                         len -= VALUE_2MB;
    1302             :                 }
    1303             : 
    1304           0 :                 break;
    1305             :         default:
    1306           0 :                 SPDK_UNREACHABLE();
    1307             :         }
    1308             : 
    1309           0 :         return rc;
    1310           0 : }
    1311             : 
    1312             : static int
    1313           0 : numa_notify(void *cb_ctx, struct spdk_mem_map *map,
    1314             :             enum spdk_mem_map_notify_action action,
    1315             :             void *vaddr, size_t len)
    1316             : {
    1317             :         struct rte_memseg *seg;
    1318             : 
    1319             :         /* We always return 0 from here, even if we aren't able to get a
    1320             :          * memseg for the address. This can happen in non-DPDK memory
    1321             :          * registration paths, for example vhost or vfio-user. That is OK,
    1322             :          * spdk_mem_get_numa_id() just returns SPDK_ENV_NUMA_ID_ANY for
    1323             :          * that kind of memory. If we return an error here, the
    1324             :          * spdk_mem_register() from vhost or vfio-user would fail which is
    1325             :          * not what we want.
    1326             :          */
    1327           0 :         seg = rte_mem_virt2memseg(vaddr, NULL);
    1328           0 :         if (seg == NULL) {
    1329           0 :                 return 0;
    1330             :         }
    1331             : 
    1332           0 :         switch (action) {
    1333             :         case SPDK_MEM_MAP_NOTIFY_REGISTER:
    1334           0 :                 spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, seg->socket_id);
    1335           0 :                 break;
    1336             :         case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
    1337           0 :                 spdk_mem_map_clear_translation(map, (uint64_t)vaddr, len);
    1338           0 :                 break;
    1339             :         default:
    1340           0 :                 break;
    1341             :         }
    1342             : 
    1343           0 :         return 0;
    1344           0 : }
    1345             : 
    1346             : static int
    1347           0 : vtophys_check_contiguous_entries(uint64_t paddr1, uint64_t paddr2)
    1348             : {
    1349             :         /* This function is always called with paddrs for two subsequent
    1350             :          * 2MB chunks in virtual address space, so those chunks will be only
    1351             :          * physically contiguous if the physical addresses are 2MB apart
    1352             :          * from each other as well.
    1353             :          */
    1354           0 :         return (paddr2 - paddr1 == VALUE_2MB);
    1355             : }
    1356             : 
    1357             : #if VFIO_ENABLED
    1358             : 
    1359             : static bool
    1360             : vfio_enabled(void)
    1361             : {
    1362             :         return rte_vfio_is_enabled("vfio_pci");
    1363             : }
    1364             : 
    1365             : /* Check if IOMMU is enabled on the system */
    1366             : static bool
    1367             : has_iommu_groups(void)
    1368             : {
    1369             :         int count = 0;
    1370             :         DIR *dir = opendir("/sys/kernel/iommu_groups");
    1371             : 
    1372             :         if (dir == NULL) {
    1373             :                 return false;
    1374             :         }
    1375             : 
    1376             :         while (count < 3 && readdir(dir) != NULL) {
    1377             :                 count++;
    1378             :         }
    1379             : 
    1380             :         closedir(dir);
    1381             :         /* there will always be ./ and ../ entries */
    1382             :         return count > 2;
    1383             : }
    1384             : 
    1385             : static bool
    1386             : vfio_noiommu_enabled(void)
    1387             : {
    1388             :         return rte_vfio_noiommu_is_enabled();
    1389             : }
    1390             : 
    1391             : static void
    1392             : vtophys_iommu_init(void)
    1393             : {
    1394             :         char proc_fd_path[PATH_MAX + 1];
    1395             :         char link_path[PATH_MAX + 1];
    1396             :         const char vfio_path[] = "/dev/vfio/vfio";
    1397             :         DIR *dir;
    1398             :         struct dirent *d;
    1399             : 
    1400             :         if (!vfio_enabled()) {
    1401             :                 return;
    1402             :         }
    1403             : 
    1404             :         if (vfio_noiommu_enabled()) {
    1405             :                 g_vfio.noiommu_enabled = true;
    1406             :         } else if (!has_iommu_groups()) {
    1407             :                 return;
    1408             :         }
    1409             : 
    1410             :         dir = opendir("/proc/self/fd");
    1411             :         if (!dir) {
    1412             :                 DEBUG_PRINT("Failed to open /proc/self/fd (%d)\n", errno);
    1413             :                 return;
    1414             :         }
    1415             : 
    1416             :         while ((d = readdir(dir)) != NULL) {
    1417             :                 if (d->d_type != DT_LNK) {
    1418             :                         continue;
    1419             :                 }
    1420             : 
    1421             :                 snprintf(proc_fd_path, sizeof(proc_fd_path), "/proc/self/fd/%s", d->d_name);
    1422             :                 if (readlink(proc_fd_path, link_path, sizeof(link_path)) != (sizeof(vfio_path) - 1)) {
    1423             :                         continue;
    1424             :                 }
    1425             : 
    1426             :                 if (memcmp(link_path, vfio_path, sizeof(vfio_path) - 1) == 0) {
    1427             :                         sscanf(d->d_name, "%d", &g_vfio.fd);
    1428             :                         break;
    1429             :                 }
    1430             :         }
    1431             : 
    1432             :         closedir(dir);
    1433             : 
    1434             :         if (g_vfio.fd < 0) {
    1435             :                 DEBUG_PRINT("Failed to discover DPDK VFIO container fd.\n");
    1436             :                 return;
    1437             :         }
    1438             : 
    1439             :         g_vfio.enabled = true;
    1440             : 
    1441             :         return;
    1442             : }
    1443             : 
    1444             : #endif
    1445             : 
    1446             : void
    1447           0 : vtophys_pci_device_added(struct rte_pci_device *pci_device)
    1448             : {
    1449             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1450             : 
    1451           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1452             : 
    1453           0 :         vtophys_dev = calloc(1, sizeof(*vtophys_dev));
    1454           0 :         if (vtophys_dev) {
    1455           0 :                 vtophys_dev->pci_device = pci_device;
    1456           0 :                 TAILQ_INSERT_TAIL(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1457           0 :         } else {
    1458           0 :                 DEBUG_PRINT("Memory allocation error\n");
    1459             :         }
    1460           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1461             : 
    1462             : #if VFIO_ENABLED
    1463             :         struct spdk_vfio_dma_map *dma_map;
    1464             :         int ret;
    1465             : 
    1466             :         if (!g_vfio.enabled) {
    1467             :                 return;
    1468             :         }
    1469             : 
    1470             :         pthread_mutex_lock(&g_vfio.mutex);
    1471             :         g_vfio.device_ref++;
    1472             :         if (g_vfio.device_ref > 1) {
    1473             :                 pthread_mutex_unlock(&g_vfio.mutex);
    1474             :                 return;
    1475             :         }
    1476             : 
    1477             :         /* This is the first SPDK device using DPDK vfio. This means that the first
    1478             :          * IOMMU group might have been just been added to the DPDK vfio container.
    1479             :          * From this point it is certain that the memory can be mapped now.
    1480             :          */
    1481             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1482             :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
    1483             :                 if (ret) {
    1484             :                         DEBUG_PRINT("Cannot update DMA mapping, error %d\n", errno);
    1485             :                         break;
    1486             :                 }
    1487             :         }
    1488             :         pthread_mutex_unlock(&g_vfio.mutex);
    1489             : #endif
    1490           0 : }
    1491             : 
    1492             : void
    1493           0 : vtophys_pci_device_removed(struct rte_pci_device *pci_device)
    1494             : {
    1495             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1496             : 
    1497           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1498           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1499           0 :                 if (vtophys_dev->pci_device == pci_device) {
    1500           0 :                         TAILQ_REMOVE(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1501           0 :                         free(vtophys_dev);
    1502           0 :                         break;
    1503             :                 }
    1504           0 :         }
    1505           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1506             : 
    1507             : #if VFIO_ENABLED
    1508             :         struct spdk_vfio_dma_map *dma_map;
    1509             :         int ret;
    1510             : 
    1511             :         if (!g_vfio.enabled) {
    1512             :                 return;
    1513             :         }
    1514             : 
    1515             :         pthread_mutex_lock(&g_vfio.mutex);
    1516             :         assert(g_vfio.device_ref > 0);
    1517             :         g_vfio.device_ref--;
    1518             :         if (g_vfio.device_ref > 0) {
    1519             :                 pthread_mutex_unlock(&g_vfio.mutex);
    1520             :                 return;
    1521             :         }
    1522             : 
    1523             :         /* This is the last SPDK device using DPDK vfio. If DPDK doesn't have
    1524             :          * any additional devices using it's vfio container, all the mappings
    1525             :          * will be automatically removed by the Linux vfio driver. We unmap
    1526             :          * the memory manually to be able to easily re-map it later regardless
    1527             :          * of other, external factors.
    1528             :          */
    1529             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1530             :                 struct vfio_iommu_type1_dma_unmap unmap = {};
    1531             :                 unmap.argsz = sizeof(unmap);
    1532             :                 unmap.flags = 0;
    1533             :                 unmap.iova = dma_map->map.iova;
    1534             :                 unmap.size = dma_map->map.size;
    1535             :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
    1536             :                 if (ret) {
    1537             :                         DEBUG_PRINT("Cannot unmap DMA memory, error %d\n", errno);
    1538             :                         break;
    1539             :                 }
    1540             :         }
    1541             :         pthread_mutex_unlock(&g_vfio.mutex);
    1542             : #endif
    1543           0 : }
    1544             : 
    1545             : int
    1546           0 : vtophys_init(void)
    1547             : {
    1548           0 :         const struct spdk_mem_map_ops vtophys_map_ops = {
    1549             :                 .notify_cb = vtophys_notify,
    1550             :                 .are_contiguous = vtophys_check_contiguous_entries,
    1551             :         };
    1552             : 
    1553           0 :         const struct spdk_mem_map_ops phys_ref_map_ops = {
    1554             :                 .notify_cb = NULL,
    1555             :                 .are_contiguous = NULL,
    1556             :         };
    1557             : 
    1558           0 :         const struct spdk_mem_map_ops numa_map_ops = {
    1559             :                 .notify_cb = numa_notify,
    1560             :                 .are_contiguous = NULL,
    1561             :         };
    1562             : 
    1563             : #if VFIO_ENABLED
    1564             :         vtophys_iommu_init();
    1565             : #endif
    1566             : 
    1567           0 :         g_phys_ref_map = spdk_mem_map_alloc(0, &phys_ref_map_ops, NULL);
    1568           0 :         if (g_phys_ref_map == NULL) {
    1569           0 :                 DEBUG_PRINT("phys_ref map allocation failed.\n");
    1570           0 :                 return -ENOMEM;
    1571             :         }
    1572             : 
    1573           0 :         g_numa_map = spdk_mem_map_alloc(SPDK_ENV_NUMA_ID_ANY, &numa_map_ops, NULL);
    1574           0 :         if (g_numa_map == NULL) {
    1575           0 :                 DEBUG_PRINT("numa map allocation failed.\n");
    1576           0 :                 spdk_mem_map_free(&g_phys_ref_map);
    1577           0 :                 return -ENOMEM;
    1578             :         }
    1579             : 
    1580           0 :         if (g_huge_pages) {
    1581           0 :                 g_vtophys_map = spdk_mem_map_alloc(SPDK_VTOPHYS_ERROR, &vtophys_map_ops, NULL);
    1582           0 :                 if (g_vtophys_map == NULL) {
    1583           0 :                         DEBUG_PRINT("vtophys map allocation failed\n");
    1584           0 :                         spdk_mem_map_free(&g_numa_map);
    1585           0 :                         spdk_mem_map_free(&g_phys_ref_map);
    1586           0 :                         return -ENOMEM;
    1587             :                 }
    1588           0 :         }
    1589           0 :         return 0;
    1590           0 : }
    1591             : 
    1592             : void
    1593           0 : vtophys_fini(void)
    1594             : {
    1595           0 :         spdk_mem_map_free(&g_vtophys_map);
    1596           0 :         spdk_mem_map_free(&g_numa_map);
    1597           0 :         spdk_mem_map_free(&g_phys_ref_map);
    1598           0 : }
    1599             : 
    1600             : uint64_t
    1601           0 : spdk_vtophys(const void *buf, uint64_t *size)
    1602             : {
    1603             :         uint64_t vaddr, paddr_2mb;
    1604             : 
    1605           0 :         if (!g_huge_pages) {
    1606           0 :                 return SPDK_VTOPHYS_ERROR;
    1607             :         }
    1608             : 
    1609           0 :         vaddr = (uint64_t)buf;
    1610           0 :         paddr_2mb = spdk_mem_map_translate(g_vtophys_map, vaddr, size);
    1611             : 
    1612             :         /*
    1613             :          * SPDK_VTOPHYS_ERROR has all bits set, so if the lookup returned SPDK_VTOPHYS_ERROR,
    1614             :          * we will still bitwise-or it with the buf offset below, but the result will still be
    1615             :          * SPDK_VTOPHYS_ERROR. However now that we do + rather than | (due to PCI vtophys being
    1616             :          * unaligned) we must now check the return value before addition.
    1617             :          */
    1618             :         SPDK_STATIC_ASSERT(SPDK_VTOPHYS_ERROR == UINT64_C(-1), "SPDK_VTOPHYS_ERROR should be all 1s");
    1619           0 :         if (paddr_2mb == SPDK_VTOPHYS_ERROR) {
    1620           0 :                 return SPDK_VTOPHYS_ERROR;
    1621             :         } else {
    1622           0 :                 return paddr_2mb + (vaddr & MASK_2MB);
    1623             :         }
    1624           0 : }
    1625             : 
    1626             : int32_t
    1627           0 : spdk_mem_get_numa_id(const void *buf, uint64_t *size)
    1628             : {
    1629           0 :         return spdk_mem_map_translate(g_numa_map, (uint64_t)buf, size);
    1630             : }
    1631             : 
    1632             : int
    1633           0 : spdk_mem_get_fd_and_offset(void *vaddr, uint64_t *offset)
    1634             : {
    1635             :         struct rte_memseg *seg;
    1636             :         int ret, fd;
    1637             : 
    1638           0 :         seg = rte_mem_virt2memseg(vaddr, NULL);
    1639           0 :         if (!seg) {
    1640           0 :                 SPDK_ERRLOG("memory %p doesn't exist\n", vaddr);
    1641           0 :                 return -ENOENT;
    1642             :         }
    1643             : 
    1644           0 :         fd = rte_memseg_get_fd_thread_unsafe(seg);
    1645           0 :         if (fd < 0) {
    1646           0 :                 return fd;
    1647             :         }
    1648             : 
    1649           0 :         ret = rte_memseg_get_fd_offset_thread_unsafe(seg, offset);
    1650           0 :         if (ret < 0) {
    1651           0 :                 return ret;
    1652             :         }
    1653             : 
    1654           0 :         return fd;
    1655           0 : }
    1656             : 
    1657             : void
    1658           0 : mem_disable_huge_pages(void)
    1659             : {
    1660           0 :         g_huge_pages = false;
    1661           0 : }

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