+++ /dev/null
-/* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2018 Intel Corporation
- */
-
-#include <inttypes.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-
-#include <rte_errno.h>
-#include <rte_log.h>
-#include <rte_memory.h>
-#include <rte_eal_memconfig.h>
-#include <rte_vfio.h>
-
-#include "eal_filesystem.h"
-#include "eal_vfio.h"
-#include "eal_private.h"
-
-#ifdef VFIO_PRESENT
-
-#define VFIO_MEM_EVENT_CLB_NAME "vfio_mem_event_clb"
-
-/* hot plug/unplug of VFIO groups may cause all DMA maps to be dropped. we can
- * recreate the mappings for DPDK segments, but we cannot do so for memory that
- * was registered by the user themselves, so we need to store the user mappings
- * somewhere, to recreate them later.
- */
-#define VFIO_MAX_USER_MEM_MAPS 256
-struct user_mem_map {
- uint64_t addr;
- uint64_t iova;
- uint64_t len;
-};
-
-struct user_mem_maps {
- rte_spinlock_recursive_t lock;
- int n_maps;
- struct user_mem_map maps[VFIO_MAX_USER_MEM_MAPS];
-};
-
-struct vfio_config {
- int vfio_enabled;
- int vfio_container_fd;
- int vfio_active_groups;
- const struct vfio_iommu_type *vfio_iommu_type;
- struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
- struct user_mem_maps mem_maps;
-};
-
-/* per-process VFIO config */
-static struct vfio_config vfio_cfgs[VFIO_MAX_CONTAINERS];
-static struct vfio_config *default_vfio_cfg = &vfio_cfgs[0];
-
-static int vfio_type1_dma_map(int);
-static int vfio_type1_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
-static int vfio_spapr_dma_map(int);
-static int vfio_spapr_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
-static int vfio_noiommu_dma_map(int);
-static int vfio_noiommu_dma_mem_map(int, uint64_t, uint64_t, uint64_t, int);
-static int vfio_dma_mem_map(struct vfio_config *vfio_cfg, uint64_t vaddr,
- uint64_t iova, uint64_t len, int do_map);
-
-/* IOMMU types we support */
-static const struct vfio_iommu_type iommu_types[] = {
- /* x86 IOMMU, otherwise known as type 1 */
- {
- .type_id = RTE_VFIO_TYPE1,
- .name = "Type 1",
- .dma_map_func = &vfio_type1_dma_map,
- .dma_user_map_func = &vfio_type1_dma_mem_map
- },
- /* ppc64 IOMMU, otherwise known as spapr */
- {
- .type_id = RTE_VFIO_SPAPR,
- .name = "sPAPR",
- .dma_map_func = &vfio_spapr_dma_map,
- .dma_user_map_func = &vfio_spapr_dma_mem_map
- },
- /* IOMMU-less mode */
- {
- .type_id = RTE_VFIO_NOIOMMU,
- .name = "No-IOMMU",
- .dma_map_func = &vfio_noiommu_dma_map,
- .dma_user_map_func = &vfio_noiommu_dma_mem_map
- },
-};
-
-static int
-is_null_map(const struct user_mem_map *map)
-{
- return map->addr == 0 && map->iova == 0 && map->len == 0;
-}
-
-/* we may need to merge user mem maps together in case of user mapping/unmapping
- * chunks of memory, so we'll need a comparator function to sort segments.
- */
-static int
-user_mem_map_cmp(const void *a, const void *b)
-{
- const struct user_mem_map *umm_a = a;
- const struct user_mem_map *umm_b = b;
-
- /* move null entries to end */
- if (is_null_map(umm_a))
- return 1;
- if (is_null_map(umm_b))
- return -1;
-
- /* sort by iova first */
- if (umm_a->iova < umm_b->iova)
- return -1;
- if (umm_a->iova > umm_b->iova)
- return 1;
-
- if (umm_a->addr < umm_b->addr)
- return -1;
- if (umm_a->addr > umm_b->addr)
- return 1;
-
- if (umm_a->len < umm_b->len)
- return -1;
- if (umm_a->len > umm_b->len)
- return 1;
-
- return 0;
-}
-
-/* adjust user map entry. this may result in shortening of existing map, or in
- * splitting existing map in two pieces.
- */
-static void
-adjust_map(struct user_mem_map *src, struct user_mem_map *end,
- uint64_t remove_va_start, uint64_t remove_len)
-{
- /* if va start is same as start address, we're simply moving start */
- if (remove_va_start == src->addr) {
- src->addr += remove_len;
- src->iova += remove_len;
- src->len -= remove_len;
- } else if (remove_va_start + remove_len == src->addr + src->len) {
- /* we're shrinking mapping from the end */
- src->len -= remove_len;
- } else {
- /* we're blowing a hole in the middle */
- struct user_mem_map tmp;
- uint64_t total_len = src->len;
-
- /* adjust source segment length */
- src->len = remove_va_start - src->addr;
-
- /* create temporary segment in the middle */
- tmp.addr = src->addr + src->len;
- tmp.iova = src->iova + src->len;
- tmp.len = remove_len;
-
- /* populate end segment - this one we will be keeping */
- end->addr = tmp.addr + tmp.len;
- end->iova = tmp.iova + tmp.len;
- end->len = total_len - src->len - tmp.len;
- }
-}
-
-/* try merging two maps into one, return 1 if succeeded */
-static int
-merge_map(struct user_mem_map *left, struct user_mem_map *right)
-{
- if (left->addr + left->len != right->addr)
- return 0;
- if (left->iova + left->len != right->iova)
- return 0;
-
- left->len += right->len;
-
- memset(right, 0, sizeof(*right));
-
- return 1;
-}
-
-static struct user_mem_map *
-find_user_mem_map(struct user_mem_maps *user_mem_maps, uint64_t addr,
- uint64_t iova, uint64_t len)
-{
- uint64_t va_end = addr + len;
- uint64_t iova_end = iova + len;
- int i;
-
- for (i = 0; i < user_mem_maps->n_maps; i++) {
- struct user_mem_map *map = &user_mem_maps->maps[i];
- uint64_t map_va_end = map->addr + map->len;
- uint64_t map_iova_end = map->iova + map->len;
-
- /* check start VA */
- if (addr < map->addr || addr >= map_va_end)
- continue;
- /* check if VA end is within boundaries */
- if (va_end <= map->addr || va_end > map_va_end)
- continue;
-
- /* check start IOVA */
- if (iova < map->iova || iova >= map_iova_end)
- continue;
- /* check if IOVA end is within boundaries */
- if (iova_end <= map->iova || iova_end > map_iova_end)
- continue;
-
- /* we've found our map */
- return map;
- }
- return NULL;
-}
-
-/* this will sort all user maps, and merge/compact any adjacent maps */
-static void
-compact_user_maps(struct user_mem_maps *user_mem_maps)
-{
- int i, n_merged, cur_idx;
-
- qsort(user_mem_maps->maps, user_mem_maps->n_maps,
- sizeof(user_mem_maps->maps[0]), user_mem_map_cmp);
-
- /* we'll go over the list backwards when merging */
- n_merged = 0;
- for (i = user_mem_maps->n_maps - 2; i >= 0; i--) {
- struct user_mem_map *l, *r;
-
- l = &user_mem_maps->maps[i];
- r = &user_mem_maps->maps[i + 1];
-
- if (is_null_map(l) || is_null_map(r))
- continue;
-
- if (merge_map(l, r))
- n_merged++;
- }
-
- /* the entries are still sorted, but now they have holes in them, so
- * walk through the list and remove the holes
- */
- if (n_merged > 0) {
- cur_idx = 0;
- for (i = 0; i < user_mem_maps->n_maps; i++) {
- if (!is_null_map(&user_mem_maps->maps[i])) {
- struct user_mem_map *src, *dst;
-
- src = &user_mem_maps->maps[i];
- dst = &user_mem_maps->maps[cur_idx++];
-
- if (src != dst) {
- memcpy(dst, src, sizeof(*src));
- memset(src, 0, sizeof(*src));
- }
- }
- }
- user_mem_maps->n_maps = cur_idx;
- }
-}
-
-static int
-vfio_open_group_fd(int iommu_group_num)
-{
- int vfio_group_fd;
- char filename[PATH_MAX];
- struct rte_mp_msg mp_req, *mp_rep;
- struct rte_mp_reply mp_reply;
- struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
- struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
-
- /* if primary, try to open the group */
- if (internal_config.process_type == RTE_PROC_PRIMARY) {
- /* try regular group format */
- snprintf(filename, sizeof(filename),
- VFIO_GROUP_FMT, iommu_group_num);
- vfio_group_fd = open(filename, O_RDWR);
- if (vfio_group_fd < 0) {
- /* if file not found, it's not an error */
- if (errno != ENOENT) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", filename,
- strerror(errno));
- return -1;
- }
-
- /* special case: try no-IOMMU path as well */
- snprintf(filename, sizeof(filename),
- VFIO_NOIOMMU_GROUP_FMT,
- iommu_group_num);
- vfio_group_fd = open(filename, O_RDWR);
- if (vfio_group_fd < 0) {
- if (errno != ENOENT) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", filename,
- strerror(errno));
- return -1;
- }
- return 0;
- }
- /* noiommu group found */
- }
-
- return vfio_group_fd;
- }
- /* if we're in a secondary process, request group fd from the primary
- * process via mp channel.
- */
- p->req = SOCKET_REQ_GROUP;
- p->group_num = iommu_group_num;
- strcpy(mp_req.name, EAL_VFIO_MP);
- mp_req.len_param = sizeof(*p);
- mp_req.num_fds = 0;
-
- vfio_group_fd = -1;
- if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
- mp_reply.nb_received == 1) {
- mp_rep = &mp_reply.msgs[0];
- p = (struct vfio_mp_param *)mp_rep->param;
- if (p->result == SOCKET_OK && mp_rep->num_fds == 1) {
- vfio_group_fd = mp_rep->fds[0];
- } else if (p->result == SOCKET_NO_FD) {
- RTE_LOG(ERR, EAL, " bad VFIO group fd\n");
- vfio_group_fd = 0;
- }
- free(mp_reply.msgs);
- }
-
- if (vfio_group_fd < 0)
- RTE_LOG(ERR, EAL, " cannot request group fd\n");
- return vfio_group_fd;
-}
-
-static struct vfio_config *
-get_vfio_cfg_by_group_num(int iommu_group_num)
-{
- struct vfio_config *vfio_cfg;
- int i, j;
-
- for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
- vfio_cfg = &vfio_cfgs[i];
- for (j = 0; j < VFIO_MAX_GROUPS; j++) {
- if (vfio_cfg->vfio_groups[j].group_num ==
- iommu_group_num)
- return vfio_cfg;
- }
- }
-
- return NULL;
-}
-
-static int
-vfio_get_group_fd(struct vfio_config *vfio_cfg,
- int iommu_group_num)
-{
- int i;
- int vfio_group_fd;
- struct vfio_group *cur_grp;
-
- /* check if we already have the group descriptor open */
- for (i = 0; i < VFIO_MAX_GROUPS; i++)
- if (vfio_cfg->vfio_groups[i].group_num == iommu_group_num)
- return vfio_cfg->vfio_groups[i].fd;
-
- /* Lets see first if there is room for a new group */
- if (vfio_cfg->vfio_active_groups == VFIO_MAX_GROUPS) {
- RTE_LOG(ERR, EAL, "Maximum number of VFIO groups reached!\n");
- return -1;
- }
-
- /* Now lets get an index for the new group */
- for (i = 0; i < VFIO_MAX_GROUPS; i++)
- if (vfio_cfg->vfio_groups[i].group_num == -1) {
- cur_grp = &vfio_cfg->vfio_groups[i];
- break;
- }
-
- /* This should not happen */
- if (i == VFIO_MAX_GROUPS) {
- RTE_LOG(ERR, EAL, "No VFIO group free slot found\n");
- return -1;
- }
-
- vfio_group_fd = vfio_open_group_fd(iommu_group_num);
- if (vfio_group_fd < 0) {
- RTE_LOG(ERR, EAL, "Failed to open group %d\n", iommu_group_num);
- return -1;
- }
-
- cur_grp->group_num = iommu_group_num;
- cur_grp->fd = vfio_group_fd;
- vfio_cfg->vfio_active_groups++;
-
- return vfio_group_fd;
-}
-
-static struct vfio_config *
-get_vfio_cfg_by_group_fd(int vfio_group_fd)
-{
- struct vfio_config *vfio_cfg;
- int i, j;
-
- for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
- vfio_cfg = &vfio_cfgs[i];
- for (j = 0; j < VFIO_MAX_GROUPS; j++)
- if (vfio_cfg->vfio_groups[j].fd == vfio_group_fd)
- return vfio_cfg;
- }
-
- return NULL;
-}
-
-static struct vfio_config *
-get_vfio_cfg_by_container_fd(int container_fd)
-{
- int i;
-
- for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
- if (vfio_cfgs[i].vfio_container_fd == container_fd)
- return &vfio_cfgs[i];
- }
-
- return NULL;
-}
-
-int
-rte_vfio_get_group_fd(int iommu_group_num)
-{
- struct vfio_config *vfio_cfg;
-
- /* get the vfio_config it belongs to */
- vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
- vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
-
- return vfio_get_group_fd(vfio_cfg, iommu_group_num);
-}
-
-static int
-get_vfio_group_idx(int vfio_group_fd)
-{
- struct vfio_config *vfio_cfg;
- int i, j;
-
- for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
- vfio_cfg = &vfio_cfgs[i];
- for (j = 0; j < VFIO_MAX_GROUPS; j++)
- if (vfio_cfg->vfio_groups[j].fd == vfio_group_fd)
- return j;
- }
-
- return -1;
-}
-
-static void
-vfio_group_device_get(int vfio_group_fd)
-{
- struct vfio_config *vfio_cfg;
- int i;
-
- vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, " invalid group fd!\n");
- return;
- }
-
- i = get_vfio_group_idx(vfio_group_fd);
- if (i < 0 || i > (VFIO_MAX_GROUPS - 1))
- RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i);
- else
- vfio_cfg->vfio_groups[i].devices++;
-}
-
-static void
-vfio_group_device_put(int vfio_group_fd)
-{
- struct vfio_config *vfio_cfg;
- int i;
-
- vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, " invalid group fd!\n");
- return;
- }
-
- i = get_vfio_group_idx(vfio_group_fd);
- if (i < 0 || i > (VFIO_MAX_GROUPS - 1))
- RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i);
- else
- vfio_cfg->vfio_groups[i].devices--;
-}
-
-static int
-vfio_group_device_count(int vfio_group_fd)
-{
- struct vfio_config *vfio_cfg;
- int i;
-
- vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, " invalid group fd!\n");
- return -1;
- }
-
- i = get_vfio_group_idx(vfio_group_fd);
- if (i < 0 || i > (VFIO_MAX_GROUPS - 1)) {
- RTE_LOG(ERR, EAL, " wrong vfio_group index (%d)\n", i);
- return -1;
- }
-
- return vfio_cfg->vfio_groups[i].devices;
-}
-
-static void
-vfio_mem_event_callback(enum rte_mem_event type, const void *addr, size_t len,
- void *arg __rte_unused)
-{
- struct rte_memseg_list *msl;
- struct rte_memseg *ms;
- size_t cur_len = 0;
-
- msl = rte_mem_virt2memseg_list(addr);
-
- /* for IOVA as VA mode, no need to care for IOVA addresses */
- if (rte_eal_iova_mode() == RTE_IOVA_VA && msl->external == 0) {
- uint64_t vfio_va = (uint64_t)(uintptr_t)addr;
- if (type == RTE_MEM_EVENT_ALLOC)
- vfio_dma_mem_map(default_vfio_cfg, vfio_va, vfio_va,
- len, 1);
- else
- vfio_dma_mem_map(default_vfio_cfg, vfio_va, vfio_va,
- len, 0);
- return;
- }
-
- /* memsegs are contiguous in memory */
- ms = rte_mem_virt2memseg(addr, msl);
- while (cur_len < len) {
- /* some memory segments may have invalid IOVA */
- if (ms->iova == RTE_BAD_IOVA) {
- RTE_LOG(DEBUG, EAL, "Memory segment at %p has bad IOVA, skipping\n",
- ms->addr);
- goto next;
- }
- if (type == RTE_MEM_EVENT_ALLOC)
- vfio_dma_mem_map(default_vfio_cfg, ms->addr_64,
- ms->iova, ms->len, 1);
- else
- vfio_dma_mem_map(default_vfio_cfg, ms->addr_64,
- ms->iova, ms->len, 0);
-next:
- cur_len += ms->len;
- ++ms;
- }
-}
-
-static int
-vfio_sync_default_container(void)
-{
- struct rte_mp_msg mp_req, *mp_rep;
- struct rte_mp_reply mp_reply;
- struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
- struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
- int iommu_type_id;
- unsigned int i;
-
- /* cannot be called from primary */
- if (rte_eal_process_type() != RTE_PROC_SECONDARY)
- return -1;
-
- /* default container fd should have been opened in rte_vfio_enable() */
- if (!default_vfio_cfg->vfio_enabled ||
- default_vfio_cfg->vfio_container_fd < 0) {
- RTE_LOG(ERR, EAL, "VFIO support is not initialized\n");
- return -1;
- }
-
- /* find default container's IOMMU type */
- p->req = SOCKET_REQ_IOMMU_TYPE;
- strcpy(mp_req.name, EAL_VFIO_MP);
- mp_req.len_param = sizeof(*p);
- mp_req.num_fds = 0;
-
- iommu_type_id = -1;
- if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
- mp_reply.nb_received == 1) {
- mp_rep = &mp_reply.msgs[0];
- p = (struct vfio_mp_param *)mp_rep->param;
- if (p->result == SOCKET_OK)
- iommu_type_id = p->iommu_type_id;
- free(mp_reply.msgs);
- }
- if (iommu_type_id < 0) {
- RTE_LOG(ERR, EAL, "Could not get IOMMU type for default container\n");
- return -1;
- }
-
- /* we now have an fd for default container, as well as its IOMMU type.
- * now, set up default VFIO container config to match.
- */
- for (i = 0; i < RTE_DIM(iommu_types); i++) {
- const struct vfio_iommu_type *t = &iommu_types[i];
- if (t->type_id != iommu_type_id)
- continue;
-
- /* we found our IOMMU type */
- default_vfio_cfg->vfio_iommu_type = t;
-
- return 0;
- }
- RTE_LOG(ERR, EAL, "Could not find IOMMU type id (%i)\n",
- iommu_type_id);
- return -1;
-}
-
-int
-rte_vfio_clear_group(int vfio_group_fd)
-{
- int i;
- struct vfio_config *vfio_cfg;
-
- vfio_cfg = get_vfio_cfg_by_group_fd(vfio_group_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, " invalid group fd!\n");
- return -1;
- }
-
- i = get_vfio_group_idx(vfio_group_fd);
- if (i < 0)
- return -1;
- vfio_cfg->vfio_groups[i].group_num = -1;
- vfio_cfg->vfio_groups[i].fd = -1;
- vfio_cfg->vfio_groups[i].devices = 0;
- vfio_cfg->vfio_active_groups--;
-
- return 0;
-}
-
-int
-rte_vfio_setup_device(const char *sysfs_base, const char *dev_addr,
- int *vfio_dev_fd, struct vfio_device_info *device_info)
-{
- struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
- rte_rwlock_t *mem_lock = &mcfg->memory_hotplug_lock;
- struct vfio_group_status group_status = {
- .argsz = sizeof(group_status)
- };
- struct vfio_config *vfio_cfg;
- struct user_mem_maps *user_mem_maps;
- int vfio_container_fd;
- int vfio_group_fd;
- int iommu_group_num;
- int i, ret;
-
- /* get group number */
- ret = rte_vfio_get_group_num(sysfs_base, dev_addr, &iommu_group_num);
- if (ret == 0) {
- RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver, skipping\n",
- dev_addr);
- return 1;
- }
-
- /* if negative, something failed */
- if (ret < 0)
- return -1;
-
- /* get the actual group fd */
- vfio_group_fd = rte_vfio_get_group_fd(iommu_group_num);
- if (vfio_group_fd < 0)
- return -1;
-
- /* if group_fd == 0, that means the device isn't managed by VFIO */
- if (vfio_group_fd == 0) {
- RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver, skipping\n",
- dev_addr);
- return 1;
- }
-
- /*
- * at this point, we know that this group is viable (meaning, all devices
- * are either bound to VFIO or not bound to anything)
- */
-
- /* check if the group is viable */
- ret = ioctl(vfio_group_fd, VFIO_GROUP_GET_STATUS, &group_status);
- if (ret) {
- RTE_LOG(ERR, EAL, " %s cannot get group status, "
- "error %i (%s)\n", dev_addr, errno, strerror(errno));
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- } else if (!(group_status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
- RTE_LOG(ERR, EAL, " %s VFIO group is not viable! "
- "Not all devices in IOMMU group bound to VFIO or unbound\n",
- dev_addr);
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
-
- /* get the vfio_config it belongs to */
- vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
- vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
- vfio_container_fd = vfio_cfg->vfio_container_fd;
- user_mem_maps = &vfio_cfg->mem_maps;
-
- /* check if group does not have a container yet */
- if (!(group_status.flags & VFIO_GROUP_FLAGS_CONTAINER_SET)) {
-
- /* add group to a container */
- ret = ioctl(vfio_group_fd, VFIO_GROUP_SET_CONTAINER,
- &vfio_container_fd);
- if (ret) {
- RTE_LOG(ERR, EAL, " %s cannot add VFIO group to container, "
- "error %i (%s)\n", dev_addr, errno, strerror(errno));
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
-
- /*
- * pick an IOMMU type and set up DMA mappings for container
- *
- * needs to be done only once, only when first group is
- * assigned to a container and only in primary process.
- * Note this can happen several times with the hotplug
- * functionality.
- */
- if (internal_config.process_type == RTE_PROC_PRIMARY &&
- vfio_cfg->vfio_active_groups == 1 &&
- vfio_group_device_count(vfio_group_fd) == 0) {
- const struct vfio_iommu_type *t;
-
- /* select an IOMMU type which we will be using */
- t = vfio_set_iommu_type(vfio_container_fd);
- if (!t) {
- RTE_LOG(ERR, EAL,
- " %s failed to select IOMMU type\n",
- dev_addr);
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
- /* lock memory hotplug before mapping and release it
- * after registering callback, to prevent races
- */
- rte_rwlock_read_lock(mem_lock);
- if (vfio_cfg == default_vfio_cfg)
- ret = t->dma_map_func(vfio_container_fd);
- else
- ret = 0;
- if (ret) {
- RTE_LOG(ERR, EAL,
- " %s DMA remapping failed, error %i (%s)\n",
- dev_addr, errno, strerror(errno));
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- rte_rwlock_read_unlock(mem_lock);
- return -1;
- }
-
- vfio_cfg->vfio_iommu_type = t;
-
- /* re-map all user-mapped segments */
- rte_spinlock_recursive_lock(&user_mem_maps->lock);
-
- /* this IOMMU type may not support DMA mapping, but
- * if we have mappings in the list - that means we have
- * previously mapped something successfully, so we can
- * be sure that DMA mapping is supported.
- */
- for (i = 0; i < user_mem_maps->n_maps; i++) {
- struct user_mem_map *map;
- map = &user_mem_maps->maps[i];
-
- ret = t->dma_user_map_func(
- vfio_container_fd,
- map->addr, map->iova, map->len,
- 1);
- if (ret) {
- RTE_LOG(ERR, EAL, "Couldn't map user memory for DMA: "
- "va: 0x%" PRIx64 " "
- "iova: 0x%" PRIx64 " "
- "len: 0x%" PRIu64 "\n",
- map->addr, map->iova,
- map->len);
- rte_spinlock_recursive_unlock(
- &user_mem_maps->lock);
- rte_rwlock_read_unlock(mem_lock);
- return -1;
- }
- }
- rte_spinlock_recursive_unlock(&user_mem_maps->lock);
-
- /* register callback for mem events */
- if (vfio_cfg == default_vfio_cfg)
- ret = rte_mem_event_callback_register(
- VFIO_MEM_EVENT_CLB_NAME,
- vfio_mem_event_callback, NULL);
- else
- ret = 0;
- /* unlock memory hotplug */
- rte_rwlock_read_unlock(mem_lock);
-
- if (ret && rte_errno != ENOTSUP) {
- RTE_LOG(ERR, EAL, "Could not install memory event callback for VFIO\n");
- return -1;
- }
- if (ret)
- RTE_LOG(DEBUG, EAL, "Memory event callbacks not supported\n");
- else
- RTE_LOG(DEBUG, EAL, "Installed memory event callback for VFIO\n");
- }
- } else if (rte_eal_process_type() != RTE_PROC_PRIMARY &&
- vfio_cfg == default_vfio_cfg &&
- vfio_cfg->vfio_iommu_type == NULL) {
- /* if we're not a primary process, we do not set up the VFIO
- * container because it's already been set up by the primary
- * process. instead, we simply ask the primary about VFIO type
- * we are using, and set the VFIO config up appropriately.
- */
- ret = vfio_sync_default_container();
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "Could not sync default VFIO container\n");
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
- /* we have successfully initialized VFIO, notify user */
- const struct vfio_iommu_type *t =
- default_vfio_cfg->vfio_iommu_type;
- RTE_LOG(NOTICE, EAL, " using IOMMU type %d (%s)\n",
- t->type_id, t->name);
- }
-
- /* get a file descriptor for the device */
- *vfio_dev_fd = ioctl(vfio_group_fd, VFIO_GROUP_GET_DEVICE_FD, dev_addr);
- if (*vfio_dev_fd < 0) {
- /* if we cannot get a device fd, this implies a problem with
- * the VFIO group or the container not having IOMMU configured.
- */
-
- RTE_LOG(WARNING, EAL, "Getting a vfio_dev_fd for %s failed\n",
- dev_addr);
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
-
- /* test and setup the device */
- ret = ioctl(*vfio_dev_fd, VFIO_DEVICE_GET_INFO, device_info);
- if (ret) {
- RTE_LOG(ERR, EAL, " %s cannot get device info, "
- "error %i (%s)\n", dev_addr, errno,
- strerror(errno));
- close(*vfio_dev_fd);
- close(vfio_group_fd);
- rte_vfio_clear_group(vfio_group_fd);
- return -1;
- }
- vfio_group_device_get(vfio_group_fd);
-
- return 0;
-}
-
-int
-rte_vfio_release_device(const char *sysfs_base, const char *dev_addr,
- int vfio_dev_fd)
-{
- struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
- rte_rwlock_t *mem_lock = &mcfg->memory_hotplug_lock;
- struct vfio_group_status group_status = {
- .argsz = sizeof(group_status)
- };
- struct vfio_config *vfio_cfg;
- int vfio_group_fd;
- int iommu_group_num;
- int ret;
-
- /* we don't want any DMA mapping messages to come while we're detaching
- * VFIO device, because this might be the last device and we might need
- * to unregister the callback.
- */
- rte_rwlock_read_lock(mem_lock);
-
- /* get group number */
- ret = rte_vfio_get_group_num(sysfs_base, dev_addr, &iommu_group_num);
- if (ret <= 0) {
- RTE_LOG(WARNING, EAL, " %s not managed by VFIO driver\n",
- dev_addr);
- /* This is an error at this point. */
- ret = -1;
- goto out;
- }
-
- /* get the actual group fd */
- vfio_group_fd = rte_vfio_get_group_fd(iommu_group_num);
- if (vfio_group_fd <= 0) {
- RTE_LOG(INFO, EAL, "rte_vfio_get_group_fd failed for %s\n",
- dev_addr);
- ret = -1;
- goto out;
- }
-
- /* get the vfio_config it belongs to */
- vfio_cfg = get_vfio_cfg_by_group_num(iommu_group_num);
- vfio_cfg = vfio_cfg ? vfio_cfg : default_vfio_cfg;
-
- /* At this point we got an active group. Closing it will make the
- * container detachment. If this is the last active group, VFIO kernel
- * code will unset the container and the IOMMU mappings.
- */
-
- /* Closing a device */
- if (close(vfio_dev_fd) < 0) {
- RTE_LOG(INFO, EAL, "Error when closing vfio_dev_fd for %s\n",
- dev_addr);
- ret = -1;
- goto out;
- }
-
- /* An VFIO group can have several devices attached. Just when there is
- * no devices remaining should the group be closed.
- */
- vfio_group_device_put(vfio_group_fd);
- if (!vfio_group_device_count(vfio_group_fd)) {
-
- if (close(vfio_group_fd) < 0) {
- RTE_LOG(INFO, EAL, "Error when closing vfio_group_fd for %s\n",
- dev_addr);
- ret = -1;
- goto out;
- }
-
- if (rte_vfio_clear_group(vfio_group_fd) < 0) {
- RTE_LOG(INFO, EAL, "Error when clearing group for %s\n",
- dev_addr);
- ret = -1;
- goto out;
- }
- }
-
- /* if there are no active device groups, unregister the callback to
- * avoid spurious attempts to map/unmap memory from VFIO.
- */
- if (vfio_cfg == default_vfio_cfg && vfio_cfg->vfio_active_groups == 0 &&
- rte_eal_process_type() != RTE_PROC_SECONDARY)
- rte_mem_event_callback_unregister(VFIO_MEM_EVENT_CLB_NAME,
- NULL);
-
- /* success */
- ret = 0;
-
-out:
- rte_rwlock_read_unlock(mem_lock);
- return ret;
-}
-
-int
-rte_vfio_enable(const char *modname)
-{
- /* initialize group list */
- int i, j;
- int vfio_available;
-
- rte_spinlock_recursive_t lock = RTE_SPINLOCK_RECURSIVE_INITIALIZER;
-
- for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
- vfio_cfgs[i].vfio_container_fd = -1;
- vfio_cfgs[i].vfio_active_groups = 0;
- vfio_cfgs[i].vfio_iommu_type = NULL;
- vfio_cfgs[i].mem_maps.lock = lock;
-
- for (j = 0; j < VFIO_MAX_GROUPS; j++) {
- vfio_cfgs[i].vfio_groups[j].fd = -1;
- vfio_cfgs[i].vfio_groups[j].group_num = -1;
- vfio_cfgs[i].vfio_groups[j].devices = 0;
- }
- }
-
- /* inform the user that we are probing for VFIO */
- RTE_LOG(INFO, EAL, "Probing VFIO support...\n");
-
- /* check if vfio module is loaded */
- vfio_available = rte_eal_check_module(modname);
-
- /* return error directly */
- if (vfio_available == -1) {
- RTE_LOG(INFO, EAL, "Could not get loaded module details!\n");
- return -1;
- }
-
- /* return 0 if VFIO modules not loaded */
- if (vfio_available == 0) {
- RTE_LOG(DEBUG, EAL, "VFIO modules not loaded, "
- "skipping VFIO support...\n");
- return 0;
- }
-
- if (internal_config.process_type == RTE_PROC_PRIMARY) {
- /* open a new container */
- default_vfio_cfg->vfio_container_fd =
- rte_vfio_get_container_fd();
- } else {
- /* get the default container from the primary process */
- default_vfio_cfg->vfio_container_fd =
- vfio_get_default_container_fd();
- }
-
- /* check if we have VFIO driver enabled */
- if (default_vfio_cfg->vfio_container_fd != -1) {
- RTE_LOG(NOTICE, EAL, "VFIO support initialized\n");
- default_vfio_cfg->vfio_enabled = 1;
- } else {
- RTE_LOG(NOTICE, EAL, "VFIO support could not be initialized\n");
- }
-
- return 0;
-}
-
-int
-rte_vfio_is_enabled(const char *modname)
-{
- const int mod_available = rte_eal_check_module(modname) > 0;
- return default_vfio_cfg->vfio_enabled && mod_available;
-}
-
-int
-vfio_get_default_container_fd(void)
-{
- struct rte_mp_msg mp_req, *mp_rep;
- struct rte_mp_reply mp_reply;
- struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
- struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
-
- if (default_vfio_cfg->vfio_enabled)
- return default_vfio_cfg->vfio_container_fd;
-
- if (internal_config.process_type == RTE_PROC_PRIMARY) {
- /* if we were secondary process we would try requesting
- * container fd from the primary, but we're the primary
- * process so just exit here
- */
- return -1;
- }
-
- p->req = SOCKET_REQ_DEFAULT_CONTAINER;
- strcpy(mp_req.name, EAL_VFIO_MP);
- mp_req.len_param = sizeof(*p);
- mp_req.num_fds = 0;
-
- if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
- mp_reply.nb_received == 1) {
- mp_rep = &mp_reply.msgs[0];
- p = (struct vfio_mp_param *)mp_rep->param;
- if (p->result == SOCKET_OK && mp_rep->num_fds == 1) {
- free(mp_reply.msgs);
- return mp_rep->fds[0];
- }
- free(mp_reply.msgs);
- }
-
- RTE_LOG(ERR, EAL, " cannot request default container fd\n");
- return -1;
-}
-
-int
-vfio_get_iommu_type(void)
-{
- if (default_vfio_cfg->vfio_iommu_type == NULL)
- return -1;
-
- return default_vfio_cfg->vfio_iommu_type->type_id;
-}
-
-const struct vfio_iommu_type *
-vfio_set_iommu_type(int vfio_container_fd)
-{
- unsigned idx;
- for (idx = 0; idx < RTE_DIM(iommu_types); idx++) {
- const struct vfio_iommu_type *t = &iommu_types[idx];
-
- int ret = ioctl(vfio_container_fd, VFIO_SET_IOMMU,
- t->type_id);
- if (!ret) {
- RTE_LOG(NOTICE, EAL, " using IOMMU type %d (%s)\n",
- t->type_id, t->name);
- return t;
- }
- /* not an error, there may be more supported IOMMU types */
- RTE_LOG(DEBUG, EAL, " set IOMMU type %d (%s) failed, "
- "error %i (%s)\n", t->type_id, t->name, errno,
- strerror(errno));
- }
- /* if we didn't find a suitable IOMMU type, fail */
- return NULL;
-}
-
-int
-vfio_has_supported_extensions(int vfio_container_fd)
-{
- int ret;
- unsigned idx, n_extensions = 0;
- for (idx = 0; idx < RTE_DIM(iommu_types); idx++) {
- const struct vfio_iommu_type *t = &iommu_types[idx];
-
- ret = ioctl(vfio_container_fd, VFIO_CHECK_EXTENSION,
- t->type_id);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, " could not get IOMMU type, "
- "error %i (%s)\n", errno,
- strerror(errno));
- close(vfio_container_fd);
- return -1;
- } else if (ret == 1) {
- /* we found a supported extension */
- n_extensions++;
- }
- RTE_LOG(DEBUG, EAL, " IOMMU type %d (%s) is %s\n",
- t->type_id, t->name,
- ret ? "supported" : "not supported");
- }
-
- /* if we didn't find any supported IOMMU types, fail */
- if (!n_extensions) {
- close(vfio_container_fd);
- return -1;
- }
-
- return 0;
-}
-
-int
-rte_vfio_get_container_fd(void)
-{
- int ret, vfio_container_fd;
- struct rte_mp_msg mp_req, *mp_rep;
- struct rte_mp_reply mp_reply;
- struct timespec ts = {.tv_sec = 5, .tv_nsec = 0};
- struct vfio_mp_param *p = (struct vfio_mp_param *)mp_req.param;
-
-
- /* if we're in a primary process, try to open the container */
- if (internal_config.process_type == RTE_PROC_PRIMARY) {
- vfio_container_fd = open(VFIO_CONTAINER_PATH, O_RDWR);
- if (vfio_container_fd < 0) {
- RTE_LOG(ERR, EAL, " cannot open VFIO container, "
- "error %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- /* check VFIO API version */
- ret = ioctl(vfio_container_fd, VFIO_GET_API_VERSION);
- if (ret != VFIO_API_VERSION) {
- if (ret < 0)
- RTE_LOG(ERR, EAL, " could not get VFIO API version, "
- "error %i (%s)\n", errno, strerror(errno));
- else
- RTE_LOG(ERR, EAL, " unsupported VFIO API version!\n");
- close(vfio_container_fd);
- return -1;
- }
-
- ret = vfio_has_supported_extensions(vfio_container_fd);
- if (ret) {
- RTE_LOG(ERR, EAL, " no supported IOMMU "
- "extensions found!\n");
- return -1;
- }
-
- return vfio_container_fd;
- }
- /*
- * if we're in a secondary process, request container fd from the
- * primary process via mp channel
- */
- p->req = SOCKET_REQ_CONTAINER;
- strcpy(mp_req.name, EAL_VFIO_MP);
- mp_req.len_param = sizeof(*p);
- mp_req.num_fds = 0;
-
- vfio_container_fd = -1;
- if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 &&
- mp_reply.nb_received == 1) {
- mp_rep = &mp_reply.msgs[0];
- p = (struct vfio_mp_param *)mp_rep->param;
- if (p->result == SOCKET_OK && mp_rep->num_fds == 1) {
- vfio_container_fd = mp_rep->fds[0];
- free(mp_reply.msgs);
- return vfio_container_fd;
- }
- free(mp_reply.msgs);
- }
-
- RTE_LOG(ERR, EAL, " cannot request container fd\n");
- return -1;
-}
-
-int
-rte_vfio_get_group_num(const char *sysfs_base,
- const char *dev_addr, int *iommu_group_num)
-{
- char linkname[PATH_MAX];
- char filename[PATH_MAX];
- char *tok[16], *group_tok, *end;
- int ret;
-
- memset(linkname, 0, sizeof(linkname));
- memset(filename, 0, sizeof(filename));
-
- /* try to find out IOMMU group for this device */
- snprintf(linkname, sizeof(linkname),
- "%s/%s/iommu_group", sysfs_base, dev_addr);
-
- ret = readlink(linkname, filename, sizeof(filename));
-
- /* if the link doesn't exist, no VFIO for us */
- if (ret < 0)
- return 0;
-
- ret = rte_strsplit(filename, sizeof(filename),
- tok, RTE_DIM(tok), '/');
-
- if (ret <= 0) {
- RTE_LOG(ERR, EAL, " %s cannot get IOMMU group\n", dev_addr);
- return -1;
- }
-
- /* IOMMU group is always the last token */
- errno = 0;
- group_tok = tok[ret - 1];
- end = group_tok;
- *iommu_group_num = strtol(group_tok, &end, 10);
- if ((end != group_tok && *end != '\0') || errno != 0) {
- RTE_LOG(ERR, EAL, " %s error parsing IOMMU number!\n", dev_addr);
- return -1;
- }
-
- return 1;
-}
-
-static int
-type1_map(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
- void *arg)
-{
- int *vfio_container_fd = arg;
-
- if (msl->external)
- return 0;
-
- return vfio_type1_dma_mem_map(*vfio_container_fd, ms->addr_64, ms->iova,
- ms->len, 1);
-}
-
-static int
-vfio_type1_dma_mem_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
- uint64_t len, int do_map)
-{
- struct vfio_iommu_type1_dma_map dma_map;
- struct vfio_iommu_type1_dma_unmap dma_unmap;
- int ret;
-
- if (do_map != 0) {
- memset(&dma_map, 0, sizeof(dma_map));
- dma_map.argsz = sizeof(struct vfio_iommu_type1_dma_map);
- dma_map.vaddr = vaddr;
- dma_map.size = len;
- dma_map.iova = iova;
- dma_map.flags = VFIO_DMA_MAP_FLAG_READ |
- VFIO_DMA_MAP_FLAG_WRITE;
-
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_MAP_DMA, &dma_map);
- if (ret) {
- /**
- * In case the mapping was already done EEXIST will be
- * returned from kernel.
- */
- if (errno == EEXIST) {
- RTE_LOG(DEBUG, EAL,
- " Memory segment is allready mapped,"
- " skipping");
- } else {
- RTE_LOG(ERR, EAL,
- " cannot set up DMA remapping,"
- " error %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
- }
- } else {
- memset(&dma_unmap, 0, sizeof(dma_unmap));
- dma_unmap.argsz = sizeof(struct vfio_iommu_type1_dma_unmap);
- dma_unmap.size = len;
- dma_unmap.iova = iova;
-
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_UNMAP_DMA,
- &dma_unmap);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot clear DMA remapping, error %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
- }
-
- return 0;
-}
-
-static int
-vfio_type1_dma_map(int vfio_container_fd)
-{
- return rte_memseg_walk(type1_map, &vfio_container_fd);
-}
-
-static int
-vfio_spapr_dma_do_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
- uint64_t len, int do_map)
-{
- struct vfio_iommu_type1_dma_map dma_map;
- struct vfio_iommu_type1_dma_unmap dma_unmap;
- int ret;
- struct vfio_iommu_spapr_register_memory reg = {
- .argsz = sizeof(reg),
- .flags = 0
- };
- reg.vaddr = (uintptr_t) vaddr;
- reg.size = len;
-
- if (do_map != 0) {
- ret = ioctl(vfio_container_fd,
- VFIO_IOMMU_SPAPR_REGISTER_MEMORY, ®);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot register vaddr for IOMMU, "
- "error %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- memset(&dma_map, 0, sizeof(dma_map));
- dma_map.argsz = sizeof(struct vfio_iommu_type1_dma_map);
- dma_map.vaddr = vaddr;
- dma_map.size = len;
- dma_map.iova = iova;
- dma_map.flags = VFIO_DMA_MAP_FLAG_READ |
- VFIO_DMA_MAP_FLAG_WRITE;
-
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_MAP_DMA, &dma_map);
- if (ret) {
- /**
- * In case the mapping was already done EBUSY will be
- * returned from kernel.
- */
- if (errno == EBUSY) {
- RTE_LOG(DEBUG, EAL,
- " Memory segment is allready mapped,"
- " skipping");
- } else {
- RTE_LOG(ERR, EAL,
- " cannot set up DMA remapping,"
- " error %i (%s)\n", errno,
- strerror(errno));
- return -1;
- }
- }
-
- } else {
- ret = ioctl(vfio_container_fd,
- VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY, ®);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot unregister vaddr for IOMMU, error %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
-
- memset(&dma_unmap, 0, sizeof(dma_unmap));
- dma_unmap.argsz = sizeof(struct vfio_iommu_type1_dma_unmap);
- dma_unmap.size = len;
- dma_unmap.iova = iova;
-
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_UNMAP_DMA,
- &dma_unmap);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot clear DMA remapping, error %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
- }
-
- return 0;
-}
-
-static int
-vfio_spapr_map_walk(const struct rte_memseg_list *msl,
- const struct rte_memseg *ms, void *arg)
-{
- int *vfio_container_fd = arg;
-
- if (msl->external)
- return 0;
-
- return vfio_spapr_dma_do_map(*vfio_container_fd, ms->addr_64, ms->iova,
- ms->len, 1);
-}
-
-struct spapr_walk_param {
- uint64_t window_size;
- uint64_t hugepage_sz;
-};
-static int
-vfio_spapr_window_size_walk(const struct rte_memseg_list *msl,
- const struct rte_memseg *ms, void *arg)
-{
- struct spapr_walk_param *param = arg;
- uint64_t max = ms->iova + ms->len;
-
- if (msl->external)
- return 0;
-
- if (max > param->window_size) {
- param->hugepage_sz = ms->hugepage_sz;
- param->window_size = max;
- }
-
- return 0;
-}
-
-static int
-vfio_spapr_create_new_dma_window(int vfio_container_fd,
- struct vfio_iommu_spapr_tce_create *create) {
- struct vfio_iommu_spapr_tce_remove remove = {
- .argsz = sizeof(remove),
- };
- struct vfio_iommu_spapr_tce_info info = {
- .argsz = sizeof(info),
- };
- int ret;
-
- /* query spapr iommu info */
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot get iommu info, "
- "error %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- /* remove default DMA of 32 bit window */
- remove.start_addr = info.dma32_window_start;
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_REMOVE, &remove);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot remove default DMA window, "
- "error %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- /* create new DMA window */
- ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_CREATE, create);
- if (ret) {
- RTE_LOG(ERR, EAL, " cannot create new DMA window, "
- "error %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- if (create->start_addr != 0) {
- RTE_LOG(ERR, EAL, " DMA window start address != 0\n");
- return -1;
- }
-
- return 0;
-}
-
-static int
-vfio_spapr_dma_mem_map(int vfio_container_fd, uint64_t vaddr, uint64_t iova,
- uint64_t len, int do_map)
-{
- struct spapr_walk_param param;
- struct vfio_iommu_spapr_tce_create create = {
- .argsz = sizeof(create),
- };
- struct vfio_config *vfio_cfg;
- struct user_mem_maps *user_mem_maps;
- int i, ret = 0;
-
- vfio_cfg = get_vfio_cfg_by_container_fd(vfio_container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, " invalid container fd!\n");
- return -1;
- }
-
- user_mem_maps = &vfio_cfg->mem_maps;
- rte_spinlock_recursive_lock(&user_mem_maps->lock);
-
- /* check if window size needs to be adjusted */
- memset(¶m, 0, sizeof(param));
-
- /* we're inside a callback so use thread-unsafe version */
- if (rte_memseg_walk_thread_unsafe(vfio_spapr_window_size_walk,
- ¶m) < 0) {
- RTE_LOG(ERR, EAL, "Could not get window size\n");
- ret = -1;
- goto out;
- }
-
- /* also check user maps */
- for (i = 0; i < user_mem_maps->n_maps; i++) {
- uint64_t max = user_mem_maps->maps[i].iova +
- user_mem_maps->maps[i].len;
- create.window_size = RTE_MAX(create.window_size, max);
- }
-
- /* sPAPR requires window size to be a power of 2 */
- create.window_size = rte_align64pow2(param.window_size);
- create.page_shift = __builtin_ctzll(param.hugepage_sz);
- create.levels = 1;
-
- if (do_map) {
- void *addr;
- /* re-create window and remap the entire memory */
- if (iova > create.window_size) {
- if (vfio_spapr_create_new_dma_window(vfio_container_fd,
- &create) < 0) {
- RTE_LOG(ERR, EAL, "Could not create new DMA window\n");
- ret = -1;
- goto out;
- }
- /* we're inside a callback, so use thread-unsafe version
- */
- if (rte_memseg_walk_thread_unsafe(vfio_spapr_map_walk,
- &vfio_container_fd) < 0) {
- RTE_LOG(ERR, EAL, "Could not recreate DMA maps\n");
- ret = -1;
- goto out;
- }
- /* remap all user maps */
- for (i = 0; i < user_mem_maps->n_maps; i++) {
- struct user_mem_map *map =
- &user_mem_maps->maps[i];
- if (vfio_spapr_dma_do_map(vfio_container_fd,
- map->addr, map->iova, map->len,
- 1)) {
- RTE_LOG(ERR, EAL, "Could not recreate user DMA maps\n");
- ret = -1;
- goto out;
- }
- }
- }
-
- /* now that we've remapped all of the memory that was present
- * before, map the segment that we were requested to map.
- *
- * however, if we were called by the callback, the memory we
- * were called with was already in the memseg list, so previous
- * mapping should've mapped that segment already.
- *
- * virt2memseg_list is a relatively cheap check, so use that. if
- * memory is within any memseg list, it's a memseg, so it's
- * already mapped.
- */
- addr = (void *)(uintptr_t)vaddr;
- if (rte_mem_virt2memseg_list(addr) == NULL &&
- vfio_spapr_dma_do_map(vfio_container_fd,
- vaddr, iova, len, 1) < 0) {
- RTE_LOG(ERR, EAL, "Could not map segment\n");
- ret = -1;
- goto out;
- }
- } else {
- /* for unmap, check if iova within DMA window */
- if (iova > create.window_size) {
- RTE_LOG(ERR, EAL, "iova beyond DMA window for unmap");
- ret = -1;
- goto out;
- }
-
- vfio_spapr_dma_do_map(vfio_container_fd, vaddr, iova, len, 0);
- }
-out:
- rte_spinlock_recursive_unlock(&user_mem_maps->lock);
- return ret;
-}
-
-static int
-vfio_spapr_dma_map(int vfio_container_fd)
-{
- struct vfio_iommu_spapr_tce_create create = {
- .argsz = sizeof(create),
- };
- struct spapr_walk_param param;
-
- memset(¶m, 0, sizeof(param));
-
- /* create DMA window from 0 to max(phys_addr + len) */
- rte_memseg_walk(vfio_spapr_window_size_walk, ¶m);
-
- /* sPAPR requires window size to be a power of 2 */
- create.window_size = rte_align64pow2(param.window_size);
- create.page_shift = __builtin_ctzll(param.hugepage_sz);
- create.levels = 1;
-
- if (vfio_spapr_create_new_dma_window(vfio_container_fd, &create) < 0) {
- RTE_LOG(ERR, EAL, "Could not create new DMA window\n");
- return -1;
- }
-
- /* map all DPDK segments for DMA. use 1:1 PA to IOVA mapping */
- if (rte_memseg_walk(vfio_spapr_map_walk, &vfio_container_fd) < 0)
- return -1;
-
- return 0;
-}
-
-static int
-vfio_noiommu_dma_map(int __rte_unused vfio_container_fd)
-{
- /* No-IOMMU mode does not need DMA mapping */
- return 0;
-}
-
-static int
-vfio_noiommu_dma_mem_map(int __rte_unused vfio_container_fd,
- uint64_t __rte_unused vaddr,
- uint64_t __rte_unused iova, uint64_t __rte_unused len,
- int __rte_unused do_map)
-{
- /* No-IOMMU mode does not need DMA mapping */
- return 0;
-}
-
-static int
-vfio_dma_mem_map(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
- uint64_t len, int do_map)
-{
- const struct vfio_iommu_type *t = vfio_cfg->vfio_iommu_type;
-
- if (!t) {
- RTE_LOG(ERR, EAL, " VFIO support not initialized\n");
- rte_errno = ENODEV;
- return -1;
- }
-
- if (!t->dma_user_map_func) {
- RTE_LOG(ERR, EAL,
- " VFIO custom DMA region maping not supported by IOMMU %s\n",
- t->name);
- rte_errno = ENOTSUP;
- return -1;
- }
-
- return t->dma_user_map_func(vfio_cfg->vfio_container_fd, vaddr, iova,
- len, do_map);
-}
-
-static int
-container_dma_map(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
- uint64_t len)
-{
- struct user_mem_map *new_map;
- struct user_mem_maps *user_mem_maps;
- int ret = 0;
-
- user_mem_maps = &vfio_cfg->mem_maps;
- rte_spinlock_recursive_lock(&user_mem_maps->lock);
- if (user_mem_maps->n_maps == VFIO_MAX_USER_MEM_MAPS) {
- RTE_LOG(ERR, EAL, "No more space for user mem maps\n");
- rte_errno = ENOMEM;
- ret = -1;
- goto out;
- }
- /* map the entry */
- if (vfio_dma_mem_map(vfio_cfg, vaddr, iova, len, 1)) {
- /* technically, this will fail if there are currently no devices
- * plugged in, even if a device were added later, this mapping
- * might have succeeded. however, since we cannot verify if this
- * is a valid mapping without having a device attached, consider
- * this to be unsupported, because we can't just store any old
- * mapping and pollute list of active mappings willy-nilly.
- */
- RTE_LOG(ERR, EAL, "Couldn't map new region for DMA\n");
- ret = -1;
- goto out;
- }
- /* create new user mem map entry */
- new_map = &user_mem_maps->maps[user_mem_maps->n_maps++];
- new_map->addr = vaddr;
- new_map->iova = iova;
- new_map->len = len;
-
- compact_user_maps(user_mem_maps);
-out:
- rte_spinlock_recursive_unlock(&user_mem_maps->lock);
- return ret;
-}
-
-static int
-container_dma_unmap(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,
- uint64_t len)
-{
- struct user_mem_map *map, *new_map = NULL;
- struct user_mem_maps *user_mem_maps;
- int ret = 0;
-
- user_mem_maps = &vfio_cfg->mem_maps;
- rte_spinlock_recursive_lock(&user_mem_maps->lock);
-
- /* find our mapping */
- map = find_user_mem_map(user_mem_maps, vaddr, iova, len);
- if (!map) {
- RTE_LOG(ERR, EAL, "Couldn't find previously mapped region\n");
- rte_errno = EINVAL;
- ret = -1;
- goto out;
- }
- if (map->addr != vaddr || map->iova != iova || map->len != len) {
- /* we're partially unmapping a previously mapped region, so we
- * need to split entry into two.
- */
- if (user_mem_maps->n_maps == VFIO_MAX_USER_MEM_MAPS) {
- RTE_LOG(ERR, EAL, "Not enough space to store partial mapping\n");
- rte_errno = ENOMEM;
- ret = -1;
- goto out;
- }
- new_map = &user_mem_maps->maps[user_mem_maps->n_maps++];
- }
-
- /* unmap the entry */
- if (vfio_dma_mem_map(vfio_cfg, vaddr, iova, len, 0)) {
- /* there may not be any devices plugged in, so unmapping will
- * fail with ENODEV/ENOTSUP rte_errno values, but that doesn't
- * stop us from removing the mapping, as the assumption is we
- * won't be needing this memory any more and thus will want to
- * prevent it from being remapped again on hotplug. so, only
- * fail if we indeed failed to unmap (e.g. if the mapping was
- * within our mapped range but had invalid alignment).
- */
- if (rte_errno != ENODEV && rte_errno != ENOTSUP) {
- RTE_LOG(ERR, EAL, "Couldn't unmap region for DMA\n");
- ret = -1;
- goto out;
- } else {
- RTE_LOG(DEBUG, EAL, "DMA unmapping failed, but removing mappings anyway\n");
- }
- }
- /* remove map from the list of active mappings */
- if (new_map != NULL) {
- adjust_map(map, new_map, vaddr, len);
-
- /* if we've created a new map by splitting, sort everything */
- if (!is_null_map(new_map)) {
- compact_user_maps(user_mem_maps);
- } else {
- /* we've created a new mapping, but it was unused */
- user_mem_maps->n_maps--;
- }
- } else {
- memset(map, 0, sizeof(*map));
- compact_user_maps(user_mem_maps);
- user_mem_maps->n_maps--;
- }
-
-out:
- rte_spinlock_recursive_unlock(&user_mem_maps->lock);
- return ret;
-}
-
-int
-rte_vfio_dma_map(uint64_t vaddr, uint64_t iova, uint64_t len)
-{
- if (len == 0) {
- rte_errno = EINVAL;
- return -1;
- }
-
- return container_dma_map(default_vfio_cfg, vaddr, iova, len);
-}
-
-int
-rte_vfio_dma_unmap(uint64_t vaddr, uint64_t iova, uint64_t len)
-{
- if (len == 0) {
- rte_errno = EINVAL;
- return -1;
- }
-
- return container_dma_unmap(default_vfio_cfg, vaddr, iova, len);
-}
-
-int
-rte_vfio_noiommu_is_enabled(void)
-{
- int fd;
- ssize_t cnt;
- char c;
-
- fd = open(VFIO_NOIOMMU_MODE, O_RDONLY);
- if (fd < 0) {
- if (errno != ENOENT) {
- RTE_LOG(ERR, EAL, " cannot open vfio noiommu file %i (%s)\n",
- errno, strerror(errno));
- return -1;
- }
- /*
- * else the file does not exists
- * i.e. noiommu is not enabled
- */
- return 0;
- }
-
- cnt = read(fd, &c, 1);
- close(fd);
- if (cnt != 1) {
- RTE_LOG(ERR, EAL, " unable to read from vfio noiommu "
- "file %i (%s)\n", errno, strerror(errno));
- return -1;
- }
-
- return c == 'Y';
-}
-
-int
-rte_vfio_container_create(void)
-{
- int i;
-
- /* Find an empty slot to store new vfio config */
- for (i = 1; i < VFIO_MAX_CONTAINERS; i++) {
- if (vfio_cfgs[i].vfio_container_fd == -1)
- break;
- }
-
- if (i == VFIO_MAX_CONTAINERS) {
- RTE_LOG(ERR, EAL, "exceed max vfio container limit\n");
- return -1;
- }
-
- vfio_cfgs[i].vfio_container_fd = rte_vfio_get_container_fd();
- if (vfio_cfgs[i].vfio_container_fd < 0) {
- RTE_LOG(NOTICE, EAL, "fail to create a new container\n");
- return -1;
- }
-
- return vfio_cfgs[i].vfio_container_fd;
-}
-
-int __rte_experimental
-rte_vfio_container_destroy(int container_fd)
-{
- struct vfio_config *vfio_cfg;
- int i;
-
- vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, "Invalid container fd\n");
- return -1;
- }
-
- for (i = 0; i < VFIO_MAX_GROUPS; i++)
- if (vfio_cfg->vfio_groups[i].group_num != -1)
- rte_vfio_container_group_unbind(container_fd,
- vfio_cfg->vfio_groups[i].group_num);
-
- close(container_fd);
- vfio_cfg->vfio_container_fd = -1;
- vfio_cfg->vfio_active_groups = 0;
- vfio_cfg->vfio_iommu_type = NULL;
-
- return 0;
-}
-
-int
-rte_vfio_container_group_bind(int container_fd, int iommu_group_num)
-{
- struct vfio_config *vfio_cfg;
-
- vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, "Invalid container fd\n");
- return -1;
- }
-
- return vfio_get_group_fd(vfio_cfg, iommu_group_num);
-}
-
-int
-rte_vfio_container_group_unbind(int container_fd, int iommu_group_num)
-{
- struct vfio_config *vfio_cfg;
- struct vfio_group *cur_grp = NULL;
- int i;
-
- vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, "Invalid container fd\n");
- return -1;
- }
-
- for (i = 0; i < VFIO_MAX_GROUPS; i++) {
- if (vfio_cfg->vfio_groups[i].group_num == iommu_group_num) {
- cur_grp = &vfio_cfg->vfio_groups[i];
- break;
- }
- }
-
- /* This should not happen */
- if (i == VFIO_MAX_GROUPS || cur_grp == NULL) {
- RTE_LOG(ERR, EAL, "Specified group number not found\n");
- return -1;
- }
-
- if (cur_grp->fd >= 0 && close(cur_grp->fd) < 0) {
- RTE_LOG(ERR, EAL, "Error when closing vfio_group_fd for"
- " iommu_group_num %d\n", iommu_group_num);
- return -1;
- }
- cur_grp->group_num = -1;
- cur_grp->fd = -1;
- cur_grp->devices = 0;
- vfio_cfg->vfio_active_groups--;
-
- return 0;
-}
-
-int
-rte_vfio_container_dma_map(int container_fd, uint64_t vaddr, uint64_t iova,
- uint64_t len)
-{
- struct vfio_config *vfio_cfg;
-
- if (len == 0) {
- rte_errno = EINVAL;
- return -1;
- }
-
- vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, "Invalid container fd\n");
- return -1;
- }
-
- return container_dma_map(vfio_cfg, vaddr, iova, len);
-}
-
-int
-rte_vfio_container_dma_unmap(int container_fd, uint64_t vaddr, uint64_t iova,
- uint64_t len)
-{
- struct vfio_config *vfio_cfg;
-
- if (len == 0) {
- rte_errno = EINVAL;
- return -1;
- }
-
- vfio_cfg = get_vfio_cfg_by_container_fd(container_fd);
- if (vfio_cfg == NULL) {
- RTE_LOG(ERR, EAL, "Invalid container fd\n");
- return -1;
- }
-
- return container_dma_unmap(vfio_cfg, vaddr, iova, len);
-}
-
-#else
-
-int
-rte_vfio_dma_map(uint64_t __rte_unused vaddr, __rte_unused uint64_t iova,
- __rte_unused uint64_t len)
-{
- return -1;
-}
-
-int
-rte_vfio_dma_unmap(uint64_t __rte_unused vaddr, uint64_t __rte_unused iova,
- __rte_unused uint64_t len)
-{
- return -1;
-}
-
-int
-rte_vfio_setup_device(__rte_unused const char *sysfs_base,
- __rte_unused const char *dev_addr,
- __rte_unused int *vfio_dev_fd,
- __rte_unused struct vfio_device_info *device_info)
-{
- return -1;
-}
-
-int
-rte_vfio_release_device(__rte_unused const char *sysfs_base,
- __rte_unused const char *dev_addr, __rte_unused int fd)
-{
- return -1;
-}
-
-int
-rte_vfio_enable(__rte_unused const char *modname)
-{
- return -1;
-}
-
-int
-rte_vfio_is_enabled(__rte_unused const char *modname)
-{
- return -1;
-}
-
-int
-rte_vfio_noiommu_is_enabled(void)
-{
- return -1;
-}
-
-int
-rte_vfio_clear_group(__rte_unused int vfio_group_fd)
-{
- return -1;
-}
-
-int
-rte_vfio_get_group_num(__rte_unused const char *sysfs_base,
- __rte_unused const char *dev_addr,
- __rte_unused int *iommu_group_num)
-{
- return -1;
-}
-
-int
-rte_vfio_get_container_fd(void)
-{
- return -1;
-}
-
-int
-rte_vfio_get_group_fd(__rte_unused int iommu_group_num)
-{
- return -1;
-}
-
-int
-rte_vfio_container_create(void)
-{
- return -1;
-}
-
-int
-rte_vfio_container_destroy(__rte_unused int container_fd)
-{
- return -1;
-}
-
-int
-rte_vfio_container_group_bind(__rte_unused int container_fd,
- __rte_unused int iommu_group_num)
-{
- return -1;
-}
-
-int
-rte_vfio_container_group_unbind(__rte_unused int container_fd,
- __rte_unused int iommu_group_num)
-{
- return -1;
-}
-
-int
-rte_vfio_container_dma_map(__rte_unused int container_fd,
- __rte_unused uint64_t vaddr,
- __rte_unused uint64_t iova,
- __rte_unused uint64_t len)
-{
- return -1;
-}
-
-int
-rte_vfio_container_dma_unmap(__rte_unused int container_fd,
- __rte_unused uint64_t vaddr,
- __rte_unused uint64_t iova,
- __rte_unused uint64_t len)
-{
- return -1;
-}
-
-#endif /* VFIO_PRESENT */
projects / ceph.git / blobdiff