drivers/vdpa/mlx5/mlx5_vdpa_lm.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2019 Mellanox Technologies, Ltd
   3  */
   4 #include <rte_malloc.h>
   5 #include <rte_errno.h>
   6
   7 #include "mlx5_vdpa_utils.h"
   8 #include "mlx5_vdpa.h"
   9
  10
  11 int
  12 mlx5_vdpa_logging_enable(struct mlx5_vdpa_priv *priv, int enable)
  13 {
  14         struct mlx5_devx_virtq_attr attr = {
  15                 .type = MLX5_VIRTQ_MODIFY_TYPE_DIRTY_BITMAP_DUMP_ENABLE,
  16                 .dirty_bitmap_dump_enable = enable,
  17         };
  18         int i;
  19
  20         for (i = 0; i < priv->nr_virtqs; ++i) {
  21                 attr.queue_index = i;
  22                 if (!priv->virtqs[i].virtq) {
  23                         DRV_LOG(DEBUG, "virtq %d is invalid for dirty bitmap "
  24                                 "enabling.", i);
  25                 } else if (mlx5_devx_cmd_modify_virtq(priv->virtqs[i].virtq,
  26                            &attr)) {
  27                         DRV_LOG(ERR, "Failed to modify virtq %d for dirty "
  28                                 "bitmap enabling.", i);
  29                         return -1;
  30                 }
  31         }
  32         return 0;
  33 }
  34
  35 int
  36 mlx5_vdpa_dirty_bitmap_set(struct mlx5_vdpa_priv *priv, uint64_t log_base,
  37                            uint64_t log_size)
  38 {
  39         struct mlx5_devx_mkey_attr mkey_attr = {
  40                         .addr = (uintptr_t)log_base,
  41                         .size = log_size,
  42                         .pd = priv->pdn,
  43                         .pg_access = 1,
  44                         .klm_array = NULL,
  45                         .klm_num = 0,
  46                         .relaxed_ordering = 0,
  47         };
  48         struct mlx5_devx_virtq_attr attr = {
  49                 .type = MLX5_VIRTQ_MODIFY_TYPE_DIRTY_BITMAP_PARAMS,
  50                 .dirty_bitmap_addr = log_base,
  51                 .dirty_bitmap_size = log_size,
  52         };
  53         struct mlx5_vdpa_query_mr *mr = rte_malloc(__func__, sizeof(*mr), 0);
  54         int i;
  55
  56         if (!mr) {
  57                 DRV_LOG(ERR, "Failed to allocate mem for lm mr.");
  58                 return -1;
  59         }
  60         mr->umem = mlx5_glue->devx_umem_reg(priv->ctx,
  61                                             (void *)(uintptr_t)log_base,
  62                                             log_size, IBV_ACCESS_LOCAL_WRITE);
  63         if (!mr->umem) {
  64                 DRV_LOG(ERR, "Failed to register umem for lm mr.");
  65                 goto err;
  66         }
  67         mkey_attr.umem_id = mr->umem->umem_id;
  68         mr->mkey = mlx5_devx_cmd_mkey_create(priv->ctx, &mkey_attr);
  69         if (!mr->mkey) {
  70                 DRV_LOG(ERR, "Failed to create Mkey for lm.");
  71                 goto err;
  72         }
  73         attr.dirty_bitmap_mkey = mr->mkey->id;
  74         for (i = 0; i < priv->nr_virtqs; ++i) {
  75                 attr.queue_index = i;
  76                 if (!priv->virtqs[i].virtq) {
  77                         DRV_LOG(DEBUG, "virtq %d is invalid for LM.", i);
  78                 } else if (mlx5_devx_cmd_modify_virtq(priv->virtqs[i].virtq,
  79                                                       &attr)) {
  80                         DRV_LOG(ERR, "Failed to modify virtq %d for LM.", i);
  81                         goto err;
  82                 }
  83         }
  84         mr->is_indirect = 0;
  85         SLIST_INSERT_HEAD(&priv->mr_list, mr, next);
  86         return 0;
  87 err:
  88         if (mr->mkey)
  89                 mlx5_devx_cmd_destroy(mr->mkey);
  90         if (mr->umem)
  91                 mlx5_glue->devx_umem_dereg(mr->umem);
  92         rte_free(mr);
  93         return -1;
  94 }
  95
  96 #define MLX5_VDPA_USED_RING_LEN(size) \
  97         ((size) * sizeof(struct vring_used_elem) + sizeof(uint16_t) * 3)
  98
  99 int
 100 mlx5_vdpa_lm_log(struct mlx5_vdpa_priv *priv)
 101 {
 102         uint64_t features;
 103         int ret = rte_vhost_get_negotiated_features(priv->vid, &features);
 104         int i;
 105
 106         if (ret) {
 107                 DRV_LOG(ERR, "Failed to get negotiated features.");
 108                 return -1;
 109         }
 110         if (!RTE_VHOST_NEED_LOG(features))
 111                 return 0;
 112         for (i = 0; i < priv->nr_virtqs; ++i) {
 113                 if (!priv->virtqs[i].virtq) {
 114                         DRV_LOG(DEBUG, "virtq %d is invalid for LM log.", i);
 115                 } else {
 116                         ret = mlx5_vdpa_virtq_stop(priv, i);
 117                         if (ret) {
 118                                 DRV_LOG(ERR, "Failed to stop virtq %d for LM "
 119                                         "log.", i);
 120                                 return -1;
 121                         }
 122                 }
 123                 rte_vhost_log_used_vring(priv->vid, i, 0,
 124                               MLX5_VDPA_USED_RING_LEN(priv->virtqs[i].vq_size));
 125         }
 126         return 0;
 127 }