LCOV - code coverage report
Current view: top level - lib/env_dpdk - memory.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 587 0.0 %
Date: 2024-12-09 09:19:17 Functions: 0 32 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2017 Intel Corporation.
       3             :  *   All rights reserved.
       4             :  */
       5             : 
       6             : #include "spdk/stdinc.h"
       7             : 
       8             : #include "env_internal.h"
       9             : #include "pci_dpdk.h"
      10             : 
      11             : #include <rte_config.h>
      12             : #include <rte_memory.h>
      13             : #include <rte_eal_memconfig.h>
      14             : #include <rte_dev.h>
      15             : #include <rte_pci.h>
      16             : 
      17             : #include "spdk_internal/assert.h"
      18             : 
      19             : #include "spdk/assert.h"
      20             : #include "spdk/likely.h"
      21             : #include "spdk/queue.h"
      22             : #include "spdk/util.h"
      23             : #include "spdk/memory.h"
      24             : #include "spdk/env_dpdk.h"
      25             : #include "spdk/log.h"
      26             : 
      27             : #ifdef __linux__
      28             : #include <linux/version.h>
      29             : #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
      30             : #include <linux/vfio.h>
      31             : #include <rte_vfio.h>
      32             : 
      33             : struct spdk_vfio_dma_map {
      34             :         struct vfio_iommu_type1_dma_map map;
      35             :         TAILQ_ENTRY(spdk_vfio_dma_map) tailq;
      36             : };
      37             : 
      38             : struct vfio_cfg {
      39             :         int fd;
      40             :         bool enabled;
      41             :         bool noiommu_enabled;
      42             :         unsigned device_ref;
      43             :         TAILQ_HEAD(, spdk_vfio_dma_map) maps;
      44             :         pthread_mutex_t mutex;
      45             : };
      46             : 
      47             : static struct vfio_cfg g_vfio = {
      48             :         .fd = -1,
      49             :         .enabled = false,
      50             :         .noiommu_enabled = false,
      51             :         .device_ref = 0,
      52             :         .maps = TAILQ_HEAD_INITIALIZER(g_vfio.maps),
      53             :         .mutex = PTHREAD_MUTEX_INITIALIZER
      54             : };
      55             : #endif
      56             : #endif
      57             : 
      58             : #if DEBUG
      59             : #define DEBUG_PRINT(...) SPDK_ERRLOG(__VA_ARGS__)
      60             : #else
      61             : #define DEBUG_PRINT(...)
      62             : #endif
      63             : 
      64             : #define FN_2MB_TO_4KB(fn)       (fn << (SHIFT_2MB - SHIFT_4KB))
      65             : #define FN_4KB_TO_2MB(fn)       (fn >> (SHIFT_2MB - SHIFT_4KB))
      66             : 
      67             : #define MAP_256TB_IDX(vfn_2mb)  ((vfn_2mb) >> (SHIFT_1GB - SHIFT_2MB))
      68             : #define MAP_1GB_IDX(vfn_2mb)    ((vfn_2mb) & ((1ULL << (SHIFT_1GB - SHIFT_2MB)) - 1))
      69             : 
      70             : /* Page is registered */
      71             : #define REG_MAP_REGISTERED      (1ULL << 62)
      72             : 
      73             : /* A notification region barrier. The 2MB translation entry that's marked
      74             :  * with this flag must be unregistered separately. This allows contiguous
      75             :  * regions to be unregistered in the same chunks they were registered.
      76             :  */
      77             : #define REG_MAP_NOTIFY_START    (1ULL << 63)
      78             : 
      79             : /* Translation of a single 2MB page. */
      80             : struct map_2mb {
      81             :         uint64_t translation_2mb;
      82             : };
      83             : 
      84             : /* Second-level map table indexed by bits [21..29] of the virtual address.
      85             :  * Each entry contains the address translation or error for entries that haven't
      86             :  * been retrieved yet.
      87             :  */
      88             : struct map_1gb {
      89             :         struct map_2mb map[1ULL << (SHIFT_1GB - SHIFT_2MB)];
      90             : };
      91             : 
      92             : /* Top-level map table indexed by bits [30..47] of the virtual address.
      93             :  * Each entry points to a second-level map table or NULL.
      94             :  */
      95             : struct map_256tb {
      96             :         struct map_1gb *map[1ULL << (SHIFT_256TB - SHIFT_1GB)];
      97             : };
      98             : 
      99             : /* Page-granularity memory address translation */
     100             : struct spdk_mem_map {
     101             :         struct map_256tb map_256tb;
     102             :         pthread_mutex_t mutex;
     103             :         uint64_t default_translation;
     104             :         struct spdk_mem_map_ops ops;
     105             :         void *cb_ctx;
     106             :         TAILQ_ENTRY(spdk_mem_map) tailq;
     107             : };
     108             : 
     109             : /* Registrations map. The 64 bit translations are bit fields with the
     110             :  * following layout (starting with the low bits):
     111             :  *    0 - 61 : reserved
     112             :  *   62 - 63 : flags
     113             :  */
     114             : static struct spdk_mem_map *g_mem_reg_map;
     115             : static TAILQ_HEAD(spdk_mem_map_head, spdk_mem_map) g_spdk_mem_maps =
     116             :         TAILQ_HEAD_INITIALIZER(g_spdk_mem_maps);
     117             : static pthread_mutex_t g_spdk_mem_map_mutex = PTHREAD_MUTEX_INITIALIZER;
     118             : 
     119             : static bool g_legacy_mem;
     120             : static bool g_huge_pages = true;
     121             : 
     122             : /*
     123             :  * Walk the currently registered memory via the main memory registration map
     124             :  * and call the new map's notify callback for each virtually contiguous region.
     125             :  */
     126             : static int
     127           0 : mem_map_notify_walk(struct spdk_mem_map *map, enum spdk_mem_map_notify_action action)
     128             : {
     129             :         size_t idx_256tb;
     130             :         uint64_t idx_1gb;
     131           0 :         uint64_t contig_start = UINT64_MAX;
     132           0 :         uint64_t contig_end = UINT64_MAX;
     133             :         struct map_1gb *map_1gb;
     134             :         int rc;
     135             : 
     136           0 :         if (!g_mem_reg_map) {
     137           0 :                 return -EINVAL;
     138             :         }
     139             : 
     140             :         /* Hold the memory registration map mutex so no new registrations can be added while we are looping. */
     141           0 :         pthread_mutex_lock(&g_mem_reg_map->mutex);
     142             : 
     143           0 :         for (idx_256tb = 0;
     144           0 :              idx_256tb < sizeof(g_mem_reg_map->map_256tb.map) / sizeof(g_mem_reg_map->map_256tb.map[0]);
     145           0 :              idx_256tb++) {
     146           0 :                 map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
     147             : 
     148           0 :                 if (!map_1gb) {
     149           0 :                         if (contig_start != UINT64_MAX) {
     150             :                                 /* End of of a virtually contiguous range */
     151           0 :                                 rc = map->ops.notify_cb(map->cb_ctx, map, action,
     152           0 :                                                         (void *)contig_start,
     153           0 :                                                         contig_end - contig_start + VALUE_2MB);
     154             :                                 /* Don't bother handling unregister failures. It can't be any worse */
     155           0 :                                 if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
     156           0 :                                         goto err_unregister;
     157             :                                 }
     158           0 :                         }
     159           0 :                         contig_start = UINT64_MAX;
     160           0 :                         continue;
     161             :                 }
     162             : 
     163           0 :                 for (idx_1gb = 0; idx_1gb < sizeof(map_1gb->map) / sizeof(map_1gb->map[0]); idx_1gb++) {
     164           0 :                         if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
     165           0 :                             (contig_start == UINT64_MAX ||
     166           0 :                              (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
     167             :                                 /* Rebuild the virtual address from the indexes */
     168           0 :                                 uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
     169             : 
     170           0 :                                 if (contig_start == UINT64_MAX) {
     171           0 :                                         contig_start = vaddr;
     172           0 :                                 }
     173             : 
     174           0 :                                 contig_end = vaddr;
     175           0 :                         } else {
     176           0 :                                 if (contig_start != UINT64_MAX) {
     177             :                                         /* End of of a virtually contiguous range */
     178           0 :                                         rc = map->ops.notify_cb(map->cb_ctx, map, action,
     179           0 :                                                                 (void *)contig_start,
     180           0 :                                                                 contig_end - contig_start + VALUE_2MB);
     181             :                                         /* Don't bother handling unregister failures. It can't be any worse */
     182           0 :                                         if (rc != 0 && action == SPDK_MEM_MAP_NOTIFY_REGISTER) {
     183           0 :                                                 goto err_unregister;
     184             :                                         }
     185             : 
     186             :                                         /* This page might be a part of a neighbour region, so process
     187             :                                          * it again. The idx_1gb will be incremented immediately.
     188             :                                          */
     189           0 :                                         idx_1gb--;
     190           0 :                                 }
     191           0 :                                 contig_start = UINT64_MAX;
     192             :                         }
     193           0 :                 }
     194           0 :         }
     195             : 
     196           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     197           0 :         return 0;
     198             : 
     199             : err_unregister:
     200             :         /* Unwind to the first empty translation so we don't unregister
     201             :          * a region that just failed to register.
     202             :          */
     203           0 :         idx_256tb = MAP_256TB_IDX((contig_start >> SHIFT_2MB) - 1);
     204           0 :         idx_1gb = MAP_1GB_IDX((contig_start >> SHIFT_2MB) - 1);
     205           0 :         contig_start = UINT64_MAX;
     206           0 :         contig_end = UINT64_MAX;
     207             : 
     208             :         /* Unregister any memory we managed to register before the failure */
     209           0 :         for (; idx_256tb < SIZE_MAX; idx_256tb--) {
     210           0 :                 map_1gb = g_mem_reg_map->map_256tb.map[idx_256tb];
     211             : 
     212           0 :                 if (!map_1gb) {
     213           0 :                         if (contig_end != UINT64_MAX) {
     214             :                                 /* End of of a virtually contiguous range */
     215           0 :                                 map->ops.notify_cb(map->cb_ctx, map,
     216             :                                                    SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     217           0 :                                                    (void *)contig_start,
     218           0 :                                                    contig_end - contig_start + VALUE_2MB);
     219           0 :                         }
     220           0 :                         contig_end = UINT64_MAX;
     221           0 :                         continue;
     222             :                 }
     223             : 
     224           0 :                 for (; idx_1gb < UINT64_MAX; idx_1gb--) {
     225             :                         /* Rebuild the virtual address from the indexes */
     226           0 :                         uint64_t vaddr = (idx_256tb << SHIFT_1GB) | (idx_1gb << SHIFT_2MB);
     227           0 :                         if ((map_1gb->map[idx_1gb].translation_2mb & REG_MAP_REGISTERED) &&
     228           0 :                             (contig_end == UINT64_MAX || (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) == 0)) {
     229             : 
     230           0 :                                 if (contig_end == UINT64_MAX) {
     231           0 :                                         contig_end = vaddr;
     232           0 :                                 }
     233           0 :                                 contig_start = vaddr;
     234           0 :                         } else {
     235           0 :                                 if (contig_end != UINT64_MAX) {
     236           0 :                                         if (map_1gb->map[idx_1gb].translation_2mb & REG_MAP_NOTIFY_START) {
     237           0 :                                                 contig_start = vaddr;
     238           0 :                                         }
     239             :                                         /* End of of a virtually contiguous range */
     240           0 :                                         map->ops.notify_cb(map->cb_ctx, map,
     241             :                                                            SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     242           0 :                                                            (void *)contig_start,
     243           0 :                                                            contig_end - contig_start + VALUE_2MB);
     244           0 :                                 }
     245           0 :                                 contig_end = UINT64_MAX;
     246             :                         }
     247           0 :                 }
     248           0 :                 idx_1gb = sizeof(map_1gb->map) / sizeof(map_1gb->map[0]) - 1;
     249           0 :         }
     250             : 
     251           0 :         pthread_mutex_unlock(&g_mem_reg_map->mutex);
     252           0 :         return rc;
     253           0 : }
     254             : 
     255             : struct spdk_mem_map *
     256           0 : spdk_mem_map_alloc(uint64_t default_translation, const struct spdk_mem_map_ops *ops, void *cb_ctx)
     257             : {
     258             :         struct spdk_mem_map *map;
     259             :         int rc;
     260             :         size_t i;
     261             : 
     262           0 :         map = calloc(1, sizeof(*map));
     263           0 :         if (map == NULL) {
     264           0 :                 return NULL;
     265             :         }
     266             : 
     267           0 :         if (pthread_mutex_init(&map->mutex, NULL)) {
     268           0 :                 free(map);
     269           0 :                 return NULL;
     270             :         }
     271             : 
     272           0 :         map->default_translation = default_translation;
     273           0 :         map->cb_ctx = cb_ctx;
     274           0 :         if (ops) {
     275           0 :                 map->ops = *ops;
     276           0 :         }
     277             : 
     278           0 :         if (ops && ops->notify_cb) {
     279           0 :                 pthread_mutex_lock(&g_spdk_mem_map_mutex);
     280           0 :                 rc = mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_REGISTER);
     281           0 :                 if (rc != 0) {
     282           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     283           0 :                         DEBUG_PRINT("Initial mem_map notify failed\n");
     284           0 :                         pthread_mutex_destroy(&map->mutex);
     285           0 :                         for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
     286           0 :                                 free(map->map_256tb.map[i]);
     287           0 :                         }
     288           0 :                         free(map);
     289           0 :                         return NULL;
     290             :                 }
     291           0 :                 TAILQ_INSERT_TAIL(&g_spdk_mem_maps, map, tailq);
     292           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     293           0 :         }
     294             : 
     295           0 :         return map;
     296           0 : }
     297             : 
     298             : void
     299           0 : spdk_mem_map_free(struct spdk_mem_map **pmap)
     300             : {
     301             :         struct spdk_mem_map *map;
     302             :         size_t i;
     303             : 
     304           0 :         if (!pmap) {
     305           0 :                 return;
     306             :         }
     307             : 
     308           0 :         map = *pmap;
     309             : 
     310           0 :         if (!map) {
     311           0 :                 return;
     312             :         }
     313             : 
     314           0 :         if (map->ops.notify_cb) {
     315           0 :                 pthread_mutex_lock(&g_spdk_mem_map_mutex);
     316           0 :                 mem_map_notify_walk(map, SPDK_MEM_MAP_NOTIFY_UNREGISTER);
     317           0 :                 TAILQ_REMOVE(&g_spdk_mem_maps, map, tailq);
     318           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     319           0 :         }
     320             : 
     321           0 :         for (i = 0; i < sizeof(map->map_256tb.map) / sizeof(map->map_256tb.map[0]); i++) {
     322           0 :                 free(map->map_256tb.map[i]);
     323           0 :         }
     324             : 
     325           0 :         pthread_mutex_destroy(&map->mutex);
     326             : 
     327           0 :         free(map);
     328           0 :         *pmap = NULL;
     329           0 : }
     330             : 
     331             : int
     332           0 : spdk_mem_register(void *_vaddr, size_t len)
     333             : {
     334             :         struct spdk_mem_map *map;
     335             :         int rc;
     336           0 :         uint64_t vaddr = (uintptr_t)_vaddr;
     337             :         uint64_t seg_vaddr;
     338             :         size_t seg_len;
     339             :         uint64_t reg;
     340             : 
     341           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     342           0 :                 DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
     343           0 :                 return -EINVAL;
     344             :         }
     345             : 
     346           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     347           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
     348             :                             __func__, vaddr, len);
     349           0 :                 return -EINVAL;
     350             :         }
     351             : 
     352           0 :         if (len == 0) {
     353           0 :                 return 0;
     354             :         }
     355             : 
     356           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     357             : 
     358           0 :         seg_vaddr = vaddr;
     359           0 :         seg_len = len;
     360           0 :         while (seg_len > 0) {
     361           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     362           0 :                 if (reg & REG_MAP_REGISTERED) {
     363           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     364           0 :                         return -EBUSY;
     365             :                 }
     366           0 :                 seg_vaddr += VALUE_2MB;
     367           0 :                 seg_len -= VALUE_2MB;
     368             :         }
     369             : 
     370           0 :         seg_vaddr = vaddr;
     371           0 :         seg_len = 0;
     372           0 :         while (len > 0) {
     373           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB,
     374           0 :                                              seg_len == 0 ? REG_MAP_REGISTERED | REG_MAP_NOTIFY_START : REG_MAP_REGISTERED);
     375           0 :                 seg_len += VALUE_2MB;
     376           0 :                 vaddr += VALUE_2MB;
     377           0 :                 len -= VALUE_2MB;
     378             :         }
     379             : 
     380           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     381           0 :                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER,
     382           0 :                                         (void *)seg_vaddr, seg_len);
     383           0 :                 if (rc != 0) {
     384           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     385           0 :                         return rc;
     386             :                 }
     387           0 :         }
     388             : 
     389           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     390           0 :         return 0;
     391           0 : }
     392             : 
     393             : int
     394           0 : spdk_mem_unregister(void *_vaddr, size_t len)
     395             : {
     396             :         struct spdk_mem_map *map;
     397             :         int rc;
     398           0 :         uint64_t vaddr = (uintptr_t)_vaddr;
     399             :         uint64_t seg_vaddr;
     400             :         size_t seg_len;
     401             :         uint64_t reg, newreg;
     402             : 
     403           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     404           0 :                 DEBUG_PRINT("invalid usermode virtual address %jx\n", vaddr);
     405           0 :                 return -EINVAL;
     406             :         }
     407             : 
     408           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     409           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%jx len=%ju\n",
     410             :                             __func__, vaddr, len);
     411           0 :                 return -EINVAL;
     412             :         }
     413             : 
     414           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     415             : 
     416             :         /* The first page must be a start of a region. Also check if it's
     417             :          * registered to make sure we don't return -ERANGE for non-registered
     418             :          * regions.
     419             :          */
     420           0 :         reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     421           0 :         if ((reg & REG_MAP_REGISTERED) && (reg & REG_MAP_NOTIFY_START) == 0) {
     422           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     423           0 :                 return -ERANGE;
     424             :         }
     425             : 
     426           0 :         seg_vaddr = vaddr;
     427           0 :         seg_len = len;
     428           0 :         while (seg_len > 0) {
     429           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     430           0 :                 if ((reg & REG_MAP_REGISTERED) == 0) {
     431           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     432           0 :                         return -EINVAL;
     433             :                 }
     434           0 :                 seg_vaddr += VALUE_2MB;
     435           0 :                 seg_len -= VALUE_2MB;
     436             :         }
     437             : 
     438           0 :         newreg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     439             :         /* If the next page is registered, it must be a start of a region as well,
     440             :          * otherwise we'd be unregistering only a part of a region.
     441             :          */
     442           0 :         if ((newreg & REG_MAP_NOTIFY_START) == 0 && (newreg & REG_MAP_REGISTERED)) {
     443           0 :                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     444           0 :                 return -ERANGE;
     445             :         }
     446           0 :         seg_vaddr = vaddr;
     447           0 :         seg_len = 0;
     448             : 
     449           0 :         while (len > 0) {
     450           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)vaddr, NULL);
     451           0 :                 spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, VALUE_2MB, 0);
     452             : 
     453           0 :                 if (seg_len > 0 && (reg & REG_MAP_NOTIFY_START)) {
     454           0 :                         TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     455           0 :                                 rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     456           0 :                                                         (void *)seg_vaddr, seg_len);
     457           0 :                                 if (rc != 0) {
     458           0 :                                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     459           0 :                                         return rc;
     460             :                                 }
     461           0 :                         }
     462             : 
     463           0 :                         seg_vaddr = vaddr;
     464           0 :                         seg_len = VALUE_2MB;
     465           0 :                 } else {
     466           0 :                         seg_len += VALUE_2MB;
     467             :                 }
     468             : 
     469           0 :                 vaddr += VALUE_2MB;
     470           0 :                 len -= VALUE_2MB;
     471             :         }
     472             : 
     473           0 :         if (seg_len > 0) {
     474           0 :                 TAILQ_FOREACH_REVERSE(map, &g_spdk_mem_maps, spdk_mem_map_head, tailq) {
     475           0 :                         rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER,
     476           0 :                                                 (void *)seg_vaddr, seg_len);
     477           0 :                         if (rc != 0) {
     478           0 :                                 pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     479           0 :                                 return rc;
     480             :                         }
     481           0 :                 }
     482           0 :         }
     483             : 
     484           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     485           0 :         return 0;
     486           0 : }
     487             : 
     488             : int
     489           0 : spdk_mem_reserve(void *vaddr, size_t len)
     490             : {
     491             :         struct spdk_mem_map *map;
     492             :         void *seg_vaddr;
     493             :         size_t seg_len;
     494             :         uint64_t reg;
     495             : 
     496           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     497           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
     498           0 :                 return -EINVAL;
     499             :         }
     500             : 
     501           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
     502           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%p len=%ju\n",
     503             :                             __func__, vaddr, len);
     504           0 :                 return -EINVAL;
     505             :         }
     506             : 
     507           0 :         if (len == 0) {
     508           0 :                 return 0;
     509             :         }
     510             : 
     511           0 :         pthread_mutex_lock(&g_spdk_mem_map_mutex);
     512             : 
     513             :         /* Check if any part of this range is already registered */
     514           0 :         seg_vaddr = vaddr;
     515           0 :         seg_len = len;
     516           0 :         while (seg_len > 0) {
     517           0 :                 reg = spdk_mem_map_translate(g_mem_reg_map, (uint64_t)seg_vaddr, NULL);
     518           0 :                 if (reg & REG_MAP_REGISTERED) {
     519           0 :                         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     520           0 :                         return -EBUSY;
     521             :                 }
     522           0 :                 seg_vaddr += VALUE_2MB;
     523           0 :                 seg_len -= VALUE_2MB;
     524             :         }
     525             : 
     526             :         /* Simply set the translation to the memory map's default. This allocates the space in the
     527             :          * map but does not provide a valid translation. */
     528           0 :         spdk_mem_map_set_translation(g_mem_reg_map, (uint64_t)vaddr, len,
     529           0 :                                      g_mem_reg_map->default_translation);
     530             : 
     531           0 :         TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
     532           0 :                 spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, map->default_translation);
     533           0 :         }
     534             : 
     535           0 :         pthread_mutex_unlock(&g_spdk_mem_map_mutex);
     536           0 :         return 0;
     537           0 : }
     538             : 
     539             : static struct map_1gb *
     540           0 : mem_map_get_map_1gb(struct spdk_mem_map *map, uint64_t vfn_2mb)
     541             : {
     542             :         struct map_1gb *map_1gb;
     543           0 :         uint64_t idx_256tb = MAP_256TB_IDX(vfn_2mb);
     544             :         size_t i;
     545             : 
     546           0 :         if (spdk_unlikely(idx_256tb >= SPDK_COUNTOF(map->map_256tb.map))) {
     547           0 :                 return NULL;
     548             :         }
     549             : 
     550           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     551             : 
     552           0 :         if (!map_1gb) {
     553           0 :                 pthread_mutex_lock(&map->mutex);
     554             : 
     555             :                 /* Recheck to make sure nobody else got the mutex first. */
     556           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     557           0 :                 if (!map_1gb) {
     558           0 :                         map_1gb = malloc(sizeof(struct map_1gb));
     559           0 :                         if (map_1gb) {
     560             :                                 /* initialize all entries to default translation */
     561           0 :                                 for (i = 0; i < SPDK_COUNTOF(map_1gb->map); i++) {
     562           0 :                                         map_1gb->map[i].translation_2mb = map->default_translation;
     563           0 :                                 }
     564           0 :                                 map->map_256tb.map[idx_256tb] = map_1gb;
     565           0 :                         }
     566           0 :                 }
     567             : 
     568           0 :                 pthread_mutex_unlock(&map->mutex);
     569             : 
     570           0 :                 if (!map_1gb) {
     571           0 :                         DEBUG_PRINT("allocation failed\n");
     572           0 :                         return NULL;
     573             :                 }
     574           0 :         }
     575             : 
     576           0 :         return map_1gb;
     577           0 : }
     578             : 
     579             : int
     580           0 : spdk_mem_map_set_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size,
     581             :                              uint64_t translation)
     582             : {
     583             :         uint64_t vfn_2mb;
     584             :         struct map_1gb *map_1gb;
     585             :         uint64_t idx_1gb;
     586             :         struct map_2mb *map_2mb;
     587             : 
     588           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
     589           0 :                 DEBUG_PRINT("invalid usermode virtual address %" PRIu64 "\n", vaddr);
     590           0 :                 return -EINVAL;
     591             :         }
     592             : 
     593             :         /* For now, only 2 MB-aligned registrations are supported */
     594           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (size & MASK_2MB)) {
     595           0 :                 DEBUG_PRINT("invalid %s parameters, vaddr=%" PRIu64 " len=%" PRIu64 "\n",
     596             :                             __func__, vaddr, size);
     597           0 :                 return -EINVAL;
     598             :         }
     599             : 
     600           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     601             : 
     602           0 :         while (size) {
     603           0 :                 map_1gb = mem_map_get_map_1gb(map, vfn_2mb);
     604           0 :                 if (!map_1gb) {
     605           0 :                         DEBUG_PRINT("could not get %p map\n", (void *)vaddr);
     606           0 :                         return -ENOMEM;
     607             :                 }
     608             : 
     609           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     610           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     611           0 :                 map_2mb->translation_2mb = translation;
     612             : 
     613           0 :                 size -= VALUE_2MB;
     614           0 :                 vfn_2mb++;
     615             :         }
     616             : 
     617           0 :         return 0;
     618           0 : }
     619             : 
     620             : int
     621           0 : spdk_mem_map_clear_translation(struct spdk_mem_map *map, uint64_t vaddr, uint64_t size)
     622             : {
     623           0 :         return spdk_mem_map_set_translation(map, vaddr, size, map->default_translation);
     624             : }
     625             : 
     626             : inline uint64_t
     627           0 : spdk_mem_map_translate(const struct spdk_mem_map *map, uint64_t vaddr, uint64_t *size)
     628             : {
     629             :         const struct map_1gb *map_1gb;
     630             :         const struct map_2mb *map_2mb;
     631             :         uint64_t idx_256tb;
     632             :         uint64_t idx_1gb;
     633             :         uint64_t vfn_2mb;
     634             :         uint64_t cur_size;
     635             :         uint64_t prev_translation;
     636             :         uint64_t orig_translation;
     637             : 
     638           0 :         if (spdk_unlikely(vaddr & ~MASK_256TB)) {
     639           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", (void *)vaddr);
     640           0 :                 return map->default_translation;
     641             :         }
     642             : 
     643           0 :         vfn_2mb = vaddr >> SHIFT_2MB;
     644           0 :         idx_256tb = MAP_256TB_IDX(vfn_2mb);
     645           0 :         idx_1gb = MAP_1GB_IDX(vfn_2mb);
     646             : 
     647           0 :         map_1gb = map->map_256tb.map[idx_256tb];
     648           0 :         if (spdk_unlikely(!map_1gb)) {
     649           0 :                 return map->default_translation;
     650             :         }
     651             : 
     652           0 :         cur_size = VALUE_2MB - _2MB_OFFSET(vaddr);
     653           0 :         map_2mb = &map_1gb->map[idx_1gb];
     654           0 :         if (size == NULL || map->ops.are_contiguous == NULL ||
     655           0 :             map_2mb->translation_2mb == map->default_translation) {
     656           0 :                 if (size != NULL) {
     657           0 :                         *size = spdk_min(*size, cur_size);
     658           0 :                 }
     659           0 :                 return map_2mb->translation_2mb;
     660             :         }
     661             : 
     662           0 :         orig_translation = map_2mb->translation_2mb;
     663           0 :         prev_translation = orig_translation;
     664           0 :         while (cur_size < *size) {
     665           0 :                 vfn_2mb++;
     666           0 :                 idx_256tb = MAP_256TB_IDX(vfn_2mb);
     667           0 :                 idx_1gb = MAP_1GB_IDX(vfn_2mb);
     668             : 
     669           0 :                 map_1gb = map->map_256tb.map[idx_256tb];
     670           0 :                 if (spdk_unlikely(!map_1gb)) {
     671           0 :                         break;
     672             :                 }
     673             : 
     674           0 :                 map_2mb = &map_1gb->map[idx_1gb];
     675           0 :                 if (!map->ops.are_contiguous(prev_translation, map_2mb->translation_2mb)) {
     676           0 :                         break;
     677             :                 }
     678             : 
     679           0 :                 cur_size += VALUE_2MB;
     680           0 :                 prev_translation = map_2mb->translation_2mb;
     681             :         }
     682             : 
     683           0 :         *size = spdk_min(*size, cur_size);
     684           0 :         return orig_translation;
     685           0 : }
     686             : 
     687             : static void
     688           0 : memory_hotplug_cb(enum rte_mem_event event_type,
     689             :                   const void *addr, size_t len, void *arg)
     690             : {
     691           0 :         if (event_type == RTE_MEM_EVENT_ALLOC) {
     692           0 :                 spdk_mem_register((void *)addr, len);
     693             : 
     694           0 :                 if (!spdk_env_dpdk_external_init()) {
     695           0 :                         return;
     696             :                 }
     697             : 
     698             :                 /* When the user initialized DPDK separately, we can't
     699             :                  * be sure that --match-allocations RTE flag was specified.
     700             :                  * Without this flag, DPDK can free memory in different units
     701             :                  * than it was allocated. It doesn't work with things like RDMA MRs.
     702             :                  *
     703             :                  * For such cases, we mark segments so they aren't freed.
     704             :                  */
     705           0 :                 while (len > 0) {
     706             :                         struct rte_memseg *seg;
     707             : 
     708           0 :                         seg = rte_mem_virt2memseg(addr, NULL);
     709           0 :                         assert(seg != NULL);
     710           0 :                         seg->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
     711           0 :                         addr = (void *)((uintptr_t)addr + seg->hugepage_sz);
     712           0 :                         len -= seg->hugepage_sz;
     713             :                 }
     714           0 :         } else if (event_type == RTE_MEM_EVENT_FREE) {
     715           0 :                 spdk_mem_unregister((void *)addr, len);
     716           0 :         }
     717           0 : }
     718             : 
     719             : static int
     720           0 : memory_iter_cb(const struct rte_memseg_list *msl,
     721             :                const struct rte_memseg *ms, size_t len, void *arg)
     722             : {
     723           0 :         return spdk_mem_register(ms->addr, len);
     724             : }
     725             : 
     726             : static bool g_mem_event_cb_registered = false;
     727             : 
     728             : static int
     729           0 : mem_map_mem_event_callback_register(void)
     730             : {
     731             :         int rc;
     732             : 
     733           0 :         rc = rte_mem_event_callback_register("spdk", memory_hotplug_cb, NULL);
     734           0 :         if (rc != 0) {
     735           0 :                 DEBUG_PRINT("memory event callback registration failed, rc = %d\n", rc);
     736           0 :                 return -errno;
     737             :         }
     738             : 
     739           0 :         g_mem_event_cb_registered = true;
     740           0 :         return 0;
     741           0 : }
     742             : 
     743             : static void
     744           0 : mem_map_mem_event_callback_unregister(void)
     745             : {
     746           0 :         if (g_mem_event_cb_registered) {
     747           0 :                 g_mem_event_cb_registered = false;
     748           0 :                 rte_mem_event_callback_unregister("spdk", NULL);
     749           0 :         }
     750           0 : }
     751             : 
     752             : int
     753           0 : mem_map_init(bool legacy_mem)
     754             : {
     755             :         int rc;
     756             : 
     757           0 :         g_legacy_mem = legacy_mem;
     758             : 
     759           0 :         g_mem_reg_map = spdk_mem_map_alloc(0, NULL, NULL);
     760           0 :         if (g_mem_reg_map == NULL) {
     761           0 :                 DEBUG_PRINT("memory registration map allocation failed\n");
     762           0 :                 return -ENOMEM;
     763             :         }
     764             : 
     765           0 :         if (!g_huge_pages) {
     766           0 :                 return 0;
     767             :         }
     768             : 
     769           0 :         if (!g_legacy_mem) {
     770             :                 /**
     771             :                  * To prevent DPDK complaining, only register the callback when
     772             :                  * we are not in legacy mem mode.
     773             :                  */
     774           0 :                 rc = mem_map_mem_event_callback_register();
     775           0 :                 if (rc != 0) {
     776           0 :                         DEBUG_PRINT("memory event callback registration failed, rc = %d\n", rc);
     777           0 :                         goto err_free_reg_map;
     778             :                 }
     779           0 :         }
     780             : 
     781             :         /*
     782             :          * Walk all DPDK memory segments and register them
     783             :          * with the main memory map
     784             :          */
     785           0 :         rc = rte_memseg_contig_walk(memory_iter_cb, NULL);
     786           0 :         if (rc != 0) {
     787           0 :                 DEBUG_PRINT("memory segments walking failed, rc = %d\n", rc);
     788           0 :                 goto err_unregister_mem_cb;
     789             :         }
     790             : 
     791           0 :         return 0;
     792             : 
     793             : err_unregister_mem_cb:
     794           0 :         mem_map_mem_event_callback_unregister();
     795             : err_free_reg_map:
     796           0 :         spdk_mem_map_free(&g_mem_reg_map);
     797           0 :         return rc;
     798           0 : }
     799             : 
     800             : void
     801           0 : mem_map_fini(void)
     802             : {
     803           0 :         mem_map_mem_event_callback_unregister();
     804           0 :         spdk_mem_map_free(&g_mem_reg_map);
     805           0 : }
     806             : 
     807             : bool
     808           0 : spdk_iommu_is_enabled(void)
     809             : {
     810             : #if VFIO_ENABLED
     811             :         return g_vfio.enabled && !g_vfio.noiommu_enabled;
     812             : #else
     813           0 :         return false;
     814             : #endif
     815             : }
     816             : 
     817             : struct spdk_vtophys_pci_device {
     818             :         struct rte_pci_device *pci_device;
     819             :         TAILQ_ENTRY(spdk_vtophys_pci_device) tailq;
     820             : };
     821             : 
     822             : static pthread_mutex_t g_vtophys_pci_devices_mutex = PTHREAD_MUTEX_INITIALIZER;
     823             : static TAILQ_HEAD(, spdk_vtophys_pci_device) g_vtophys_pci_devices =
     824             :         TAILQ_HEAD_INITIALIZER(g_vtophys_pci_devices);
     825             : 
     826             : static struct spdk_mem_map *g_vtophys_map;
     827             : static struct spdk_mem_map *g_phys_ref_map;
     828             : static struct spdk_mem_map *g_numa_map;
     829             : 
     830             : #if VFIO_ENABLED
     831             : static int
     832             : _vfio_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     833             : {
     834             :         struct spdk_vfio_dma_map *dma_map;
     835             :         int ret;
     836             : 
     837             :         dma_map = calloc(1, sizeof(*dma_map));
     838             :         if (dma_map == NULL) {
     839             :                 return -ENOMEM;
     840             :         }
     841             : 
     842             :         dma_map->map.argsz = sizeof(dma_map->map);
     843             :         dma_map->map.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
     844             :         dma_map->map.vaddr = vaddr;
     845             :         dma_map->map.iova = iova;
     846             :         dma_map->map.size = size;
     847             : 
     848             :         if (g_vfio.device_ref == 0) {
     849             :                 /* VFIO requires at least one device (IOMMU group) to be added to
     850             :                  * a VFIO container before it is possible to perform any IOMMU
     851             :                  * operations on that container. This memory will be mapped once
     852             :                  * the first device (IOMMU group) is hotplugged.
     853             :                  *
     854             :                  * Since the vfio container is managed internally by DPDK, it is
     855             :                  * also possible that some device is already in that container, but
     856             :                  * it's not managed by SPDK -  e.g. an NIC attached internally
     857             :                  * inside DPDK. We could map the memory straight away in such
     858             :                  * scenario, but there's no need to do it. DPDK devices clearly
     859             :                  * don't need our mappings and hence we defer the mapping
     860             :                  * unconditionally until the first SPDK-managed device is
     861             :                  * hotplugged.
     862             :                  */
     863             :                 goto out_insert;
     864             :         }
     865             : 
     866             :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
     867             :         if (ret) {
     868             :                 /* There are cases the vfio container doesn't have IOMMU group, it's safe for this case */
     869             :                 SPDK_NOTICELOG("Cannot set up DMA mapping, error %d, ignored\n", errno);
     870             :         }
     871             : 
     872             : out_insert:
     873             :         TAILQ_INSERT_TAIL(&g_vfio.maps, dma_map, tailq);
     874             :         return 0;
     875             : }
     876             : 
     877             : 
     878             : static int
     879             : vtophys_iommu_map_dma(uint64_t vaddr, uint64_t iova, uint64_t size)
     880             : {
     881             :         uint64_t refcount;
     882             :         int ret;
     883             : 
     884             :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     885             :         assert(refcount < UINT64_MAX);
     886             :         if (refcount > 0) {
     887             :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     888             :                 return 0;
     889             :         }
     890             : 
     891             :         pthread_mutex_lock(&g_vfio.mutex);
     892             :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     893             :         pthread_mutex_unlock(&g_vfio.mutex);
     894             :         if (ret) {
     895             :                 return ret;
     896             :         }
     897             : 
     898             :         spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount + 1);
     899             :         return 0;
     900             : }
     901             : 
     902             : int
     903             : vtophys_iommu_map_dma_bar(uint64_t vaddr, uint64_t iova, uint64_t size)
     904             : {
     905             :         int ret;
     906             : 
     907             :         pthread_mutex_lock(&g_vfio.mutex);
     908             :         ret = _vfio_iommu_map_dma(vaddr, iova, size);
     909             :         pthread_mutex_unlock(&g_vfio.mutex);
     910             : 
     911             :         return ret;
     912             : }
     913             : 
     914             : static int
     915             : _vfio_iommu_unmap_dma(struct spdk_vfio_dma_map *dma_map)
     916             : {
     917             :         struct vfio_iommu_type1_dma_unmap unmap = {};
     918             :         int ret;
     919             : 
     920             :         if (g_vfio.device_ref == 0) {
     921             :                 /* Memory is not mapped anymore, just remove it's references */
     922             :                 goto out_remove;
     923             :         }
     924             : 
     925             :         unmap.argsz = sizeof(unmap);
     926             :         unmap.flags = 0;
     927             :         unmap.iova = dma_map->map.iova;
     928             :         unmap.size = dma_map->map.size;
     929             :         ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
     930             :         if (ret) {
     931             :                 SPDK_NOTICELOG("Cannot clear DMA mapping, error %d, ignored\n", errno);
     932             :         }
     933             : 
     934             : out_remove:
     935             :         TAILQ_REMOVE(&g_vfio.maps, dma_map, tailq);
     936             :         free(dma_map);
     937             :         return 0;
     938             : }
     939             : 
     940             : static int
     941             : vtophys_iommu_unmap_dma(uint64_t iova, uint64_t size)
     942             : {
     943             :         struct spdk_vfio_dma_map *dma_map;
     944             :         uint64_t refcount;
     945             :         int ret;
     946             : 
     947             :         pthread_mutex_lock(&g_vfio.mutex);
     948             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     949             :                 if (dma_map->map.iova == iova) {
     950             :                         break;
     951             :                 }
     952             :         }
     953             : 
     954             :         if (dma_map == NULL) {
     955             :                 DEBUG_PRINT("Cannot clear DMA mapping for IOVA %"PRIx64" - it's not mapped\n", iova);
     956             :                 pthread_mutex_unlock(&g_vfio.mutex);
     957             :                 return -ENXIO;
     958             :         }
     959             : 
     960             :         refcount = spdk_mem_map_translate(g_phys_ref_map, iova, NULL);
     961             :         assert(refcount < UINT64_MAX);
     962             :         if (refcount > 0) {
     963             :                 spdk_mem_map_set_translation(g_phys_ref_map, iova, size, refcount - 1);
     964             :         }
     965             : 
     966             :         /* We still have outstanding references, don't clear it. */
     967             :         if (refcount > 1) {
     968             :                 pthread_mutex_unlock(&g_vfio.mutex);
     969             :                 return 0;
     970             :         }
     971             : 
     972             :         /** don't support partial or multiple-page unmap for now */
     973             :         assert(dma_map->map.size == size);
     974             : 
     975             :         ret = _vfio_iommu_unmap_dma(dma_map);
     976             :         pthread_mutex_unlock(&g_vfio.mutex);
     977             : 
     978             :         return ret;
     979             : }
     980             : 
     981             : int
     982             : vtophys_iommu_unmap_dma_bar(uint64_t vaddr)
     983             : {
     984             :         struct spdk_vfio_dma_map *dma_map;
     985             :         int ret;
     986             : 
     987             :         pthread_mutex_lock(&g_vfio.mutex);
     988             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
     989             :                 if (dma_map->map.vaddr == vaddr) {
     990             :                         break;
     991             :                 }
     992             :         }
     993             : 
     994             :         if (dma_map == NULL) {
     995             :                 DEBUG_PRINT("Cannot clear DMA mapping for address %"PRIx64" - it's not mapped\n", vaddr);
     996             :                 pthread_mutex_unlock(&g_vfio.mutex);
     997             :                 return -ENXIO;
     998             :         }
     999             : 
    1000             :         ret = _vfio_iommu_unmap_dma(dma_map);
    1001             :         pthread_mutex_unlock(&g_vfio.mutex);
    1002             :         return ret;
    1003             : }
    1004             : #endif
    1005             : 
    1006             : static uint64_t
    1007           0 : vtophys_get_paddr_memseg(uint64_t vaddr)
    1008             : {
    1009             :         uintptr_t paddr;
    1010             :         struct rte_memseg *seg;
    1011             : 
    1012           0 :         seg = rte_mem_virt2memseg((void *)(uintptr_t)vaddr, NULL);
    1013           0 :         if (seg != NULL) {
    1014           0 :                 paddr = seg->iova;
    1015           0 :                 if (paddr == RTE_BAD_IOVA) {
    1016           0 :                         return SPDK_VTOPHYS_ERROR;
    1017             :                 }
    1018           0 :                 paddr += (vaddr - (uintptr_t)seg->addr);
    1019           0 :                 return paddr;
    1020             :         }
    1021             : 
    1022           0 :         return SPDK_VTOPHYS_ERROR;
    1023           0 : }
    1024             : 
    1025             : /* Try to get the paddr from /proc/self/pagemap */
    1026             : static uint64_t
    1027           0 : vtophys_get_paddr_pagemap(uint64_t vaddr)
    1028             : {
    1029             :         uintptr_t paddr;
    1030             : 
    1031             :         /* Silence static analyzers */
    1032           0 :         assert(vaddr != 0);
    1033           0 :         paddr = rte_mem_virt2iova((void *)vaddr);
    1034           0 :         if (paddr == RTE_BAD_IOVA) {
    1035             :                 /*
    1036             :                  * The vaddr may be valid but doesn't have a backing page
    1037             :                  * assigned yet.  Touch the page to ensure a backing page
    1038             :                  * gets assigned, then try to translate again.
    1039             :                  */
    1040           0 :                 rte_atomic64_read((rte_atomic64_t *)vaddr);
    1041           0 :                 paddr = rte_mem_virt2iova((void *)vaddr);
    1042           0 :         }
    1043           0 :         if (paddr == RTE_BAD_IOVA) {
    1044             :                 /* Unable to get to the physical address. */
    1045           0 :                 return SPDK_VTOPHYS_ERROR;
    1046             :         }
    1047             : 
    1048           0 :         return paddr;
    1049           0 : }
    1050             : 
    1051             : static uint64_t
    1052           0 : pci_device_vtophys(struct rte_pci_device *dev, uint64_t vaddr, size_t len)
    1053             : {
    1054             :         struct rte_mem_resource *res;
    1055             :         uint64_t paddr;
    1056             :         unsigned r;
    1057             : 
    1058           0 :         for (r = 0; r < PCI_MAX_RESOURCE; r++) {
    1059           0 :                 res = dpdk_pci_device_get_mem_resource(dev, r);
    1060             : 
    1061           0 :                 if (res->phys_addr == 0 || vaddr < (uint64_t)res->addr ||
    1062           0 :                     (vaddr + len) >= (uint64_t)res->addr + res->len) {
    1063           0 :                         continue;
    1064             :                 }
    1065             : 
    1066             : #if VFIO_ENABLED
    1067             :                 if (spdk_iommu_is_enabled() && rte_eal_iova_mode() == RTE_IOVA_VA) {
    1068             :                         /*
    1069             :                          * The IOMMU is on and we're using IOVA == VA. The BAR was
    1070             :                          * automatically registered when it was mapped, so just return
    1071             :                          * the virtual address here.
    1072             :                          */
    1073             :                         return vaddr;
    1074             :                 }
    1075             : #endif
    1076           0 :                 paddr = res->phys_addr + (vaddr - (uint64_t)res->addr);
    1077           0 :                 return paddr;
    1078             :         }
    1079             : 
    1080           0 :         return SPDK_VTOPHYS_ERROR;
    1081           0 : }
    1082             : 
    1083             : /* Try to get the paddr from pci devices */
    1084             : static uint64_t
    1085           0 : vtophys_get_paddr_pci(uint64_t vaddr, size_t len)
    1086             : {
    1087             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1088             :         uintptr_t paddr;
    1089             :         struct rte_pci_device   *dev;
    1090             : 
    1091           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1092           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1093           0 :                 dev = vtophys_dev->pci_device;
    1094           0 :                 paddr = pci_device_vtophys(dev, vaddr, len);
    1095           0 :                 if (paddr != SPDK_VTOPHYS_ERROR) {
    1096           0 :                         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1097           0 :                         return paddr;
    1098             :                 }
    1099           0 :         }
    1100           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1101             : 
    1102           0 :         return SPDK_VTOPHYS_ERROR;
    1103           0 : }
    1104             : 
    1105             : static int
    1106           0 : vtophys_notify(void *cb_ctx, struct spdk_mem_map *map,
    1107             :                enum spdk_mem_map_notify_action action,
    1108             :                void *vaddr, size_t len)
    1109             : {
    1110           0 :         int rc = 0;
    1111             :         uint64_t paddr;
    1112             : 
    1113           0 :         if ((uintptr_t)vaddr & ~MASK_256TB) {
    1114           0 :                 DEBUG_PRINT("invalid usermode virtual address %p\n", vaddr);
    1115           0 :                 return -EINVAL;
    1116             :         }
    1117             : 
    1118           0 :         if (((uintptr_t)vaddr & MASK_2MB) || (len & MASK_2MB)) {
    1119           0 :                 DEBUG_PRINT("invalid parameters, vaddr=%p len=%ju\n",
    1120             :                             vaddr, len);
    1121           0 :                 return -EINVAL;
    1122             :         }
    1123             : 
    1124             :         /* Get the physical address from the DPDK memsegs */
    1125           0 :         paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1126             : 
    1127           0 :         switch (action) {
    1128             :         case SPDK_MEM_MAP_NOTIFY_REGISTER:
    1129           0 :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1130             :                         /* This is not an address that DPDK is managing. */
    1131             : 
    1132             :                         /* Check if this is a PCI BAR. They need special handling */
    1133           0 :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1134           0 :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1135             :                                 /* Get paddr for each 2MB chunk in this address range */
    1136           0 :                                 while (len > 0) {
    1137           0 :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1138           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1139           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1140           0 :                                                 return -EFAULT;
    1141             :                                         }
    1142             : 
    1143           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1144           0 :                                         if (rc != 0) {
    1145           0 :                                                 return rc;
    1146             :                                         }
    1147             : 
    1148           0 :                                         vaddr += VALUE_2MB;
    1149           0 :                                         len -= VALUE_2MB;
    1150             :                                 }
    1151             : 
    1152           0 :                                 return 0;
    1153             :                         }
    1154             : 
    1155             : #if VFIO_ENABLED
    1156             :                         enum rte_iova_mode iova_mode;
    1157             : 
    1158             :                         iova_mode = rte_eal_iova_mode();
    1159             : 
    1160             :                         if (spdk_iommu_is_enabled() && iova_mode == RTE_IOVA_VA) {
    1161             :                                 /* We'll use the virtual address as the iova to match DPDK. */
    1162             :                                 paddr = (uint64_t)vaddr;
    1163             :                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, len);
    1164             :                                 if (rc) {
    1165             :                                         return -EFAULT;
    1166             :                                 }
    1167             :                                 while (len > 0) {
    1168             :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1169             :                                         if (rc != 0) {
    1170             :                                                 return rc;
    1171             :                                         }
    1172             :                                         vaddr += VALUE_2MB;
    1173             :                                         paddr += VALUE_2MB;
    1174             :                                         len -= VALUE_2MB;
    1175             :                                 }
    1176             :                         } else
    1177             : #endif
    1178             :                         {
    1179             :                                 /* Get the physical address from /proc/self/pagemap. */
    1180           0 :                                 paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1181           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1182           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1183           0 :                                         return -EFAULT;
    1184             :                                 }
    1185             : 
    1186             :                                 /* Get paddr for each 2MB chunk in this address range */
    1187           0 :                                 while (len > 0) {
    1188             :                                         /* Get the physical address from /proc/self/pagemap. */
    1189           0 :                                         paddr = vtophys_get_paddr_pagemap((uint64_t)vaddr);
    1190             : 
    1191           0 :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1192           0 :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1193           0 :                                                 return -EFAULT;
    1194             :                                         }
    1195             : 
    1196           0 :                                         if (paddr & MASK_2MB) {
    1197           0 :                                                 DEBUG_PRINT("invalid paddr 0x%" PRIx64 " - must be 2MB aligned\n", paddr);
    1198           0 :                                                 return -EINVAL;
    1199             :                                         }
    1200             : #if VFIO_ENABLED
    1201             :                                         /* If the IOMMU is on, but DPDK is using iova-mode=pa, we want to register this memory
    1202             :                                          * with the IOMMU using the physical address to match. */
    1203             :                                         if (spdk_iommu_is_enabled()) {
    1204             :                                                 rc = vtophys_iommu_map_dma((uint64_t)vaddr, paddr, VALUE_2MB);
    1205             :                                                 if (rc) {
    1206             :                                                         DEBUG_PRINT("Unable to assign vaddr %p to paddr 0x%" PRIx64 "\n", vaddr, paddr);
    1207             :                                                         return -EFAULT;
    1208             :                                                 }
    1209             :                                         }
    1210             : #endif
    1211             : 
    1212           0 :                                         rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1213           0 :                                         if (rc != 0) {
    1214           0 :                                                 return rc;
    1215             :                                         }
    1216             : 
    1217           0 :                                         vaddr += VALUE_2MB;
    1218           0 :                                         len -= VALUE_2MB;
    1219             :                                 }
    1220             :                         }
    1221           0 :                 } else {
    1222             :                         /* This is an address managed by DPDK. Just setup the translations. */
    1223           0 :                         while (len > 0) {
    1224           0 :                                 paddr = vtophys_get_paddr_memseg((uint64_t)vaddr);
    1225           0 :                                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1226           0 :                                         DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1227           0 :                                         return -EFAULT;
    1228             :                                 }
    1229             : 
    1230           0 :                                 rc = spdk_mem_map_set_translation(map, (uint64_t)vaddr, VALUE_2MB, paddr);
    1231           0 :                                 if (rc != 0) {
    1232           0 :                                         return rc;
    1233             :                                 }
    1234             : 
    1235           0 :                                 vaddr += VALUE_2MB;
    1236           0 :                                 len -= VALUE_2MB;
    1237             :                         }
    1238             :                 }
    1239             : 
    1240           0 :                 break;
    1241             :         case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
    1242             : #if VFIO_ENABLED
    1243             :                 if (paddr == SPDK_VTOPHYS_ERROR) {
    1244             :                         /*
    1245             :                          * This is not an address that DPDK is managing.
    1246             :                          */
    1247             : 
    1248             :                         /* Check if this is a PCI BAR. They need special handling */
    1249             :                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, len);
    1250             :                         if (paddr != SPDK_VTOPHYS_ERROR) {
    1251             :                                 /* Get paddr for each 2MB chunk in this address range */
    1252             :                                 while (len > 0) {
    1253             :                                         paddr = vtophys_get_paddr_pci((uint64_t)vaddr, VALUE_2MB);
    1254             :                                         if (paddr == SPDK_VTOPHYS_ERROR) {
    1255             :                                                 DEBUG_PRINT("could not get phys addr for %p\n", vaddr);
    1256             :                                                 return -EFAULT;
    1257             :                                         }
    1258             : 
    1259             :                                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1260             :                                         if (rc != 0) {
    1261             :                                                 return rc;
    1262             :                                         }
    1263             : 
    1264             :                                         vaddr += VALUE_2MB;
    1265             :                                         len -= VALUE_2MB;
    1266             :                                 }
    1267             : 
    1268             :                                 return 0;
    1269             :                         }
    1270             : 
    1271             :                         /* If vfio is enabled,
    1272             :                          * we need to unmap the range from the IOMMU
    1273             :                          */
    1274             :                         if (spdk_iommu_is_enabled()) {
    1275             :                                 uint64_t buffer_len = len;
    1276             :                                 uint8_t *va = vaddr;
    1277             :                                 enum rte_iova_mode iova_mode;
    1278             : 
    1279             :                                 iova_mode = rte_eal_iova_mode();
    1280             :                                 /*
    1281             :                                  * In virtual address mode, the region is contiguous and can be done in
    1282             :                                  * one unmap.
    1283             :                                  */
    1284             :                                 if (iova_mode == RTE_IOVA_VA) {
    1285             :                                         paddr = spdk_mem_map_translate(map, (uint64_t)va, &buffer_len);
    1286             :                                         if (buffer_len != len || paddr != (uintptr_t)va) {
    1287             :                                                 DEBUG_PRINT("Unmapping %p with length %lu failed because "
    1288             :                                                             "translation had address 0x%" PRIx64 " and length %lu\n",
    1289             :                                                             va, len, paddr, buffer_len);
    1290             :                                                 return -EINVAL;
    1291             :                                         }
    1292             :                                         rc = vtophys_iommu_unmap_dma(paddr, len);
    1293             :                                         if (rc) {
    1294             :                                                 DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1295             :                                                 return -EFAULT;
    1296             :                                         }
    1297             :                                 } else if (iova_mode == RTE_IOVA_PA) {
    1298             :                                         /* Get paddr for each 2MB chunk in this address range */
    1299             :                                         while (buffer_len > 0) {
    1300             :                                                 paddr = spdk_mem_map_translate(map, (uint64_t)va, NULL);
    1301             : 
    1302             :                                                 if (paddr == SPDK_VTOPHYS_ERROR || buffer_len < VALUE_2MB) {
    1303             :                                                         DEBUG_PRINT("could not get phys addr for %p\n", va);
    1304             :                                                         return -EFAULT;
    1305             :                                                 }
    1306             : 
    1307             :                                                 rc = vtophys_iommu_unmap_dma(paddr, VALUE_2MB);
    1308             :                                                 if (rc) {
    1309             :                                                         DEBUG_PRINT("Failed to iommu unmap paddr 0x%" PRIx64 "\n", paddr);
    1310             :                                                         return -EFAULT;
    1311             :                                                 }
    1312             : 
    1313             :                                                 va += VALUE_2MB;
    1314             :                                                 buffer_len -= VALUE_2MB;
    1315             :                                         }
    1316             :                                 }
    1317             :                         }
    1318             :                 }
    1319             : #endif
    1320           0 :                 while (len > 0) {
    1321           0 :                         rc = spdk_mem_map_clear_translation(map, (uint64_t)vaddr, VALUE_2MB);
    1322           0 :                         if (rc != 0) {
    1323           0 :                                 return rc;
    1324             :                         }
    1325             : 
    1326           0 :                         vaddr += VALUE_2MB;
    1327           0 :                         len -= VALUE_2MB;
    1328             :                 }
    1329             : 
    1330           0 :                 break;
    1331             :         default:
    1332           0 :                 SPDK_UNREACHABLE();
    1333             :         }
    1334             : 
    1335           0 :         return rc;
    1336           0 : }
    1337             : 
    1338             : static int
    1339           0 : numa_notify(void *cb_ctx, struct spdk_mem_map *map,
    1340             :             enum spdk_mem_map_notify_action action,
    1341             :             void *vaddr, size_t len)
    1342             : {
    1343             :         struct rte_memseg *seg;
    1344             : 
    1345             :         /* We always return 0 from here, even if we aren't able to get a
    1346             :          * memseg for the address. This can happen in non-DPDK memory
    1347             :          * registration paths, for example vhost or vfio-user. That is OK,
    1348             :          * spdk_mem_get_numa_id() just returns SPDK_ENV_NUMA_ID_ANY for
    1349             :          * that kind of memory. If we return an error here, the
    1350             :          * spdk_mem_register() from vhost or vfio-user would fail which is
    1351             :          * not what we want.
    1352             :          */
    1353           0 :         seg = rte_mem_virt2memseg(vaddr, NULL);
    1354           0 :         if (seg == NULL) {
    1355           0 :                 return 0;
    1356             :         }
    1357             : 
    1358           0 :         switch (action) {
    1359             :         case SPDK_MEM_MAP_NOTIFY_REGISTER:
    1360           0 :                 spdk_mem_map_set_translation(map, (uint64_t)vaddr, len, seg->socket_id);
    1361           0 :                 break;
    1362             :         case SPDK_MEM_MAP_NOTIFY_UNREGISTER:
    1363           0 :                 spdk_mem_map_clear_translation(map, (uint64_t)vaddr, len);
    1364           0 :                 break;
    1365             :         default:
    1366           0 :                 break;
    1367             :         }
    1368             : 
    1369           0 :         return 0;
    1370           0 : }
    1371             : 
    1372             : static int
    1373           0 : vtophys_check_contiguous_entries(uint64_t paddr1, uint64_t paddr2)
    1374             : {
    1375             :         /* This function is always called with paddrs for two subsequent
    1376             :          * 2MB chunks in virtual address space, so those chunks will be only
    1377             :          * physically contiguous if the physical addresses are 2MB apart
    1378             :          * from each other as well.
    1379             :          */
    1380           0 :         return (paddr2 - paddr1 == VALUE_2MB);
    1381             : }
    1382             : 
    1383             : #if VFIO_ENABLED
    1384             : 
    1385             : static bool
    1386             : vfio_enabled(void)
    1387             : {
    1388             :         return rte_vfio_is_enabled("vfio_pci");
    1389             : }
    1390             : 
    1391             : /* Check if IOMMU is enabled on the system */
    1392             : static bool
    1393             : has_iommu_groups(void)
    1394             : {
    1395             :         int count = 0;
    1396             :         DIR *dir = opendir("/sys/kernel/iommu_groups");
    1397             : 
    1398             :         if (dir == NULL) {
    1399             :                 return false;
    1400             :         }
    1401             : 
    1402             :         while (count < 3 && readdir(dir) != NULL) {
    1403             :                 count++;
    1404             :         }
    1405             : 
    1406             :         closedir(dir);
    1407             :         /* there will always be ./ and ../ entries */
    1408             :         return count > 2;
    1409             : }
    1410             : 
    1411             : static bool
    1412             : vfio_noiommu_enabled(void)
    1413             : {
    1414             :         return rte_vfio_noiommu_is_enabled();
    1415             : }
    1416             : 
    1417             : static void
    1418             : vtophys_iommu_init(void)
    1419             : {
    1420             :         char proc_fd_path[PATH_MAX + 1];
    1421             :         char link_path[PATH_MAX + 1];
    1422             :         const char vfio_path[] = "/dev/vfio/vfio";
    1423             :         DIR *dir;
    1424             :         struct dirent *d;
    1425             : 
    1426             :         if (!vfio_enabled()) {
    1427             :                 return;
    1428             :         }
    1429             : 
    1430             :         if (vfio_noiommu_enabled()) {
    1431             :                 g_vfio.noiommu_enabled = true;
    1432             :         } else if (!has_iommu_groups()) {
    1433             :                 return;
    1434             :         }
    1435             : 
    1436             :         dir = opendir("/proc/self/fd");
    1437             :         if (!dir) {
    1438             :                 DEBUG_PRINT("Failed to open /proc/self/fd (%d)\n", errno);
    1439             :                 return;
    1440             :         }
    1441             : 
    1442             :         while ((d = readdir(dir)) != NULL) {
    1443             :                 if (d->d_type != DT_LNK) {
    1444             :                         continue;
    1445             :                 }
    1446             : 
    1447             :                 snprintf(proc_fd_path, sizeof(proc_fd_path), "/proc/self/fd/%s", d->d_name);
    1448             :                 if (readlink(proc_fd_path, link_path, sizeof(link_path)) != (sizeof(vfio_path) - 1)) {
    1449             :                         continue;
    1450             :                 }
    1451             : 
    1452             :                 if (memcmp(link_path, vfio_path, sizeof(vfio_path) - 1) == 0) {
    1453             :                         sscanf(d->d_name, "%d", &g_vfio.fd);
    1454             :                         break;
    1455             :                 }
    1456             :         }
    1457             : 
    1458             :         closedir(dir);
    1459             : 
    1460             :         if (g_vfio.fd < 0) {
    1461             :                 DEBUG_PRINT("Failed to discover DPDK VFIO container fd.\n");
    1462             :                 return;
    1463             :         }
    1464             : 
    1465             :         g_vfio.enabled = true;
    1466             : 
    1467             :         return;
    1468             : }
    1469             : 
    1470             : #endif
    1471             : 
    1472             : void
    1473           0 : vtophys_pci_device_added(struct rte_pci_device *pci_device)
    1474             : {
    1475             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1476             : 
    1477           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1478             : 
    1479           0 :         vtophys_dev = calloc(1, sizeof(*vtophys_dev));
    1480           0 :         if (vtophys_dev) {
    1481           0 :                 vtophys_dev->pci_device = pci_device;
    1482           0 :                 TAILQ_INSERT_TAIL(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1483           0 :         } else {
    1484           0 :                 DEBUG_PRINT("Memory allocation error\n");
    1485             :         }
    1486           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1487             : 
    1488             : #if VFIO_ENABLED
    1489             :         struct spdk_vfio_dma_map *dma_map;
    1490             :         int ret;
    1491             : 
    1492             :         if (!g_vfio.enabled) {
    1493             :                 return;
    1494             :         }
    1495             : 
    1496             :         pthread_mutex_lock(&g_vfio.mutex);
    1497             :         g_vfio.device_ref++;
    1498             :         if (g_vfio.device_ref > 1) {
    1499             :                 pthread_mutex_unlock(&g_vfio.mutex);
    1500             :                 return;
    1501             :         }
    1502             : 
    1503             :         /* This is the first SPDK device using DPDK vfio. This means that the first
    1504             :          * IOMMU group might have been just been added to the DPDK vfio container.
    1505             :          * From this point it is certain that the memory can be mapped now.
    1506             :          */
    1507             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1508             :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_MAP_DMA, &dma_map->map);
    1509             :                 if (ret) {
    1510             :                         DEBUG_PRINT("Cannot update DMA mapping, error %d\n", errno);
    1511             :                         break;
    1512             :                 }
    1513             :         }
    1514             :         pthread_mutex_unlock(&g_vfio.mutex);
    1515             : #endif
    1516           0 : }
    1517             : 
    1518             : void
    1519           0 : vtophys_pci_device_removed(struct rte_pci_device *pci_device)
    1520             : {
    1521             :         struct spdk_vtophys_pci_device *vtophys_dev;
    1522             : 
    1523           0 :         pthread_mutex_lock(&g_vtophys_pci_devices_mutex);
    1524           0 :         TAILQ_FOREACH(vtophys_dev, &g_vtophys_pci_devices, tailq) {
    1525           0 :                 if (vtophys_dev->pci_device == pci_device) {
    1526           0 :                         TAILQ_REMOVE(&g_vtophys_pci_devices, vtophys_dev, tailq);
    1527           0 :                         free(vtophys_dev);
    1528           0 :                         break;
    1529             :                 }
    1530           0 :         }
    1531           0 :         pthread_mutex_unlock(&g_vtophys_pci_devices_mutex);
    1532             : 
    1533             : #if VFIO_ENABLED
    1534             :         struct spdk_vfio_dma_map *dma_map;
    1535             :         int ret;
    1536             : 
    1537             :         if (!g_vfio.enabled) {
    1538             :                 return;
    1539             :         }
    1540             : 
    1541             :         pthread_mutex_lock(&g_vfio.mutex);
    1542             :         assert(g_vfio.device_ref > 0);
    1543             :         g_vfio.device_ref--;
    1544             :         if (g_vfio.device_ref > 0) {
    1545             :                 pthread_mutex_unlock(&g_vfio.mutex);
    1546             :                 return;
    1547             :         }
    1548             : 
    1549             :         /* This is the last SPDK device using DPDK vfio. If DPDK doesn't have
    1550             :          * any additional devices using it's vfio container, all the mappings
    1551             :          * will be automatically removed by the Linux vfio driver. We unmap
    1552             :          * the memory manually to be able to easily re-map it later regardless
    1553             :          * of other, external factors.
    1554             :          */
    1555             :         TAILQ_FOREACH(dma_map, &g_vfio.maps, tailq) {
    1556             :                 struct vfio_iommu_type1_dma_unmap unmap = {};
    1557             :                 unmap.argsz = sizeof(unmap);
    1558             :                 unmap.flags = 0;
    1559             :                 unmap.iova = dma_map->map.iova;
    1560             :                 unmap.size = dma_map->map.size;
    1561             :                 ret = ioctl(g_vfio.fd, VFIO_IOMMU_UNMAP_DMA, &unmap);
    1562             :                 if (ret) {
    1563             :                         DEBUG_PRINT("Cannot unmap DMA memory, error %d\n", errno);
    1564             :                         break;
    1565             :                 }
    1566             :         }
    1567             :         pthread_mutex_unlock(&g_vfio.mutex);
    1568             : #endif
    1569           0 : }
    1570             : 
    1571             : int
    1572           0 : vtophys_init(void)
    1573             : {
    1574           0 :         const struct spdk_mem_map_ops vtophys_map_ops = {
    1575             :                 .notify_cb = vtophys_notify,
    1576             :                 .are_contiguous = vtophys_check_contiguous_entries,
    1577             :         };
    1578             : 
    1579           0 :         const struct spdk_mem_map_ops phys_ref_map_ops = {
    1580             :                 .notify_cb = NULL,
    1581             :                 .are_contiguous = NULL,
    1582             :         };
    1583             : 
    1584           0 :         const struct spdk_mem_map_ops numa_map_ops = {
    1585             :                 .notify_cb = numa_notify,
    1586             :                 .are_contiguous = NULL,
    1587             :         };
    1588             : 
    1589             : #if VFIO_ENABLED
    1590             :         vtophys_iommu_init();
    1591             : #endif
    1592             : 
    1593           0 :         g_phys_ref_map = spdk_mem_map_alloc(0, &phys_ref_map_ops, NULL);
    1594           0 :         if (g_phys_ref_map == NULL) {
    1595           0 :                 DEBUG_PRINT("phys_ref map allocation failed.\n");
    1596           0 :                 return -ENOMEM;
    1597             :         }
    1598             : 
    1599           0 :         g_numa_map = spdk_mem_map_alloc(SPDK_ENV_NUMA_ID_ANY, &numa_map_ops, NULL);
    1600           0 :         if (g_numa_map == NULL) {
    1601           0 :                 DEBUG_PRINT("numa map allocation failed.\n");
    1602           0 :                 spdk_mem_map_free(&g_phys_ref_map);
    1603           0 :                 return -ENOMEM;
    1604             :         }
    1605             : 
    1606           0 :         if (g_huge_pages) {
    1607           0 :                 g_vtophys_map = spdk_mem_map_alloc(SPDK_VTOPHYS_ERROR, &vtophys_map_ops, NULL);
    1608           0 :                 if (g_vtophys_map == NULL) {
    1609           0 :                         DEBUG_PRINT("vtophys map allocation failed\n");
    1610           0 :                         spdk_mem_map_free(&g_numa_map);
    1611           0 :                         spdk_mem_map_free(&g_phys_ref_map);
    1612           0 :                         return -ENOMEM;
    1613             :                 }
    1614           0 :         }
    1615           0 :         return 0;
    1616           0 : }
    1617             : 
    1618             : void
    1619           0 : vtophys_fini(void)
    1620             : {
    1621           0 :         spdk_mem_map_free(&g_vtophys_map);
    1622           0 :         spdk_mem_map_free(&g_numa_map);
    1623           0 :         spdk_mem_map_free(&g_phys_ref_map);
    1624           0 : }
    1625             : 
    1626             : uint64_t
    1627           0 : spdk_vtophys(const void *buf, uint64_t *size)
    1628             : {
    1629             :         uint64_t vaddr, paddr_2mb;
    1630             : 
    1631           0 :         if (!g_huge_pages) {
    1632           0 :                 return SPDK_VTOPHYS_ERROR;
    1633             :         }
    1634             : 
    1635           0 :         vaddr = (uint64_t)buf;
    1636           0 :         paddr_2mb = spdk_mem_map_translate(g_vtophys_map, vaddr, size);
    1637             : 
    1638             :         /*
    1639             :          * SPDK_VTOPHYS_ERROR has all bits set, so if the lookup returned SPDK_VTOPHYS_ERROR,
    1640             :          * we will still bitwise-or it with the buf offset below, but the result will still be
    1641             :          * SPDK_VTOPHYS_ERROR. However now that we do + rather than | (due to PCI vtophys being
    1642             :          * unaligned) we must now check the return value before addition.
    1643             :          */
    1644             :         SPDK_STATIC_ASSERT(SPDK_VTOPHYS_ERROR == UINT64_C(-1), "SPDK_VTOPHYS_ERROR should be all 1s");
    1645           0 :         if (paddr_2mb == SPDK_VTOPHYS_ERROR) {
    1646           0 :                 return SPDK_VTOPHYS_ERROR;
    1647             :         } else {
    1648           0 :                 return paddr_2mb + (vaddr & MASK_2MB);
    1649             :         }
    1650           0 : }
    1651             : 
    1652             : int32_t
    1653           0 : spdk_mem_get_numa_id(const void *buf, uint64_t *size)
    1654             : {
    1655           0 :         return spdk_mem_map_translate(g_numa_map, (uint64_t)buf, size);
    1656             : }
    1657             : 
    1658             : int
    1659           0 : spdk_mem_get_fd_and_offset(void *vaddr, uint64_t *offset)
    1660             : {
    1661             :         struct rte_memseg *seg;
    1662             :         int ret, fd;
    1663             : 
    1664           0 :         seg = rte_mem_virt2memseg(vaddr, NULL);
    1665           0 :         if (!seg) {
    1666           0 :                 SPDK_ERRLOG("memory %p doesn't exist\n", vaddr);
    1667           0 :                 return -ENOENT;
    1668             :         }
    1669             : 
    1670           0 :         fd = rte_memseg_get_fd_thread_unsafe(seg);
    1671           0 :         if (fd < 0) {
    1672           0 :                 return fd;
    1673             :         }
    1674             : 
    1675           0 :         ret = rte_memseg_get_fd_offset_thread_unsafe(seg, offset);
    1676           0 :         if (ret < 0) {
    1677           0 :                 return ret;
    1678             :         }
    1679             : 
    1680           0 :         return fd;
    1681           0 : }
    1682             : 
    1683             : void
    1684           0 : mem_disable_huge_pages(void)
    1685             : {
    1686           0 :         g_huge_pages = false;
    1687           0 : }

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