drivers/regex/mlx5/mlx5_regex.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2020 Mellanox Technologies, Ltd
   3  */
   4
   5 #include <rte_malloc.h>
   6 #include <rte_log.h>
   7 #include <rte_errno.h>
   8 #include <rte_pci.h>
   9 #include <rte_regexdev.h>
  10 #include <rte_regexdev_core.h>
  11 #include <rte_regexdev_driver.h>
  12 #include <rte_bus_pci.h>
  13
  14 #include <mlx5_common.h>
  15 #include <mlx5_common_mr.h>
  16 #include <mlx5_glue.h>
  17 #include <mlx5_devx_cmds.h>
  18 #include <mlx5_prm.h>
  19
  20 #include "mlx5_regex.h"
  21 #include "mlx5_regex_utils.h"
  22 #include "mlx5_rxp_csrs.h"
  23
  24 #define MLX5_REGEX_DRIVER_NAME regex_mlx5
  25
  26 int mlx5_regex_logtype;
  27
  28 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  29         .dev_info_get = mlx5_regex_info_get,
  30         .dev_configure = mlx5_regex_configure,
  31         .dev_db_import = mlx5_regex_rules_db_import,
  32         .dev_qp_setup = mlx5_regex_qp_setup,
  33         .dev_start = mlx5_regex_start,
  34         .dev_stop = mlx5_regex_stop,
  35         .dev_close = mlx5_regex_close,
  36 };
  37
  38 int
  39 mlx5_regex_start(struct rte_regexdev *dev __rte_unused)
  40 {
  41         return 0;
  42 }
  43
  44 int
  45 mlx5_regex_stop(struct rte_regexdev *dev __rte_unused)
  46 {
  47         return 0;
  48 }
  49
  50 int
  51 mlx5_regex_close(struct rte_regexdev *dev __rte_unused)
  52 {
  53         return 0;
  54 }
  55
  56 static int
  57 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  58 {
  59         uint32_t fpga_ident = 0;
  60         int err;
  61         int i;
  62
  63         for (i = 0; i < num_engines; i++) {
  64                 err = mlx5_devx_regex_register_read(ctx, i,
  65                                                     MLX5_RXP_CSR_IDENTIFIER,
  66                                                     &fpga_ident);
  67                 fpga_ident = (fpga_ident & (0x0000FFFF));
  68                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  69                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  70                                 "memory 0x%x", i, err, fpga_ident);
  71                         if (!err)
  72                                 err = EINVAL;
  73                         return err;
  74                 }
  75         }
  76         return 0;
  77 }
  78
  79 static void
  80 mlx5_regex_get_name(char *name, struct rte_device *dev)
  81 {
  82         sprintf(name, "mlx5_regex_%s", dev->name);
  83 }
  84
  85 static int
  86 mlx5_regex_dev_probe(struct mlx5_common_device *cdev)
  87 {
  88         struct mlx5_regex_priv *priv = NULL;
  89         struct mlx5_hca_attr *attr = &cdev->config.hca_attr;
  90         char name[RTE_REGEXDEV_NAME_MAX_LEN];
  91         int ret;
  92         uint32_t val;
  93
  94         if ((!attr->regex && !attr->mmo_regex_sq_en && !attr->mmo_regex_qp_en)
  95             || attr->regexp_num_of_engines == 0) {
  96                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
  97                         "old FW/OFED version?");
  98                 rte_errno = ENOTSUP;
  99                 return -rte_errno;
 100         }
 101         if (mlx5_regex_engines_status(cdev->ctx, 2)) {
 102                 DRV_LOG(ERR, "RegEx engine error.");
 103                 rte_errno = ENOMEM;
 104                 return -rte_errno;
 105         }
 106         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 107                            RTE_CACHE_LINE_SIZE);
 108         if (!priv) {
 109                 DRV_LOG(ERR, "Failed to allocate private memory.");
 110                 rte_errno = ENOMEM;
 111                 return -rte_errno;
 112         }
 113         priv->mmo_regex_qp_cap = attr->mmo_regex_qp_en;
 114         priv->mmo_regex_sq_cap = attr->mmo_regex_sq_en;
 115         priv->cdev = cdev;
 116         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 117         ret = mlx5_devx_regex_register_read(priv->cdev->ctx, 0,
 118                                             MLX5_RXP_CSR_IDENTIFIER, &val);
 119         if (ret) {
 120                 DRV_LOG(ERR, "CSR read failed!");
 121                 goto dev_error;
 122         }
 123         if (val == MLX5_RXP_BF2_IDENTIFIER)
 124                 priv->is_bf2 = 1;
 125         /* Default RXP programming mode to Shared. */
 126         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 127         mlx5_regex_get_name(name, cdev->dev);
 128         priv->regexdev = rte_regexdev_register(name);
 129         if (priv->regexdev == NULL) {
 130                 DRV_LOG(ERR, "Failed to register RegEx device.");
 131                 rte_errno = rte_errno ? rte_errno : EINVAL;
 132                 goto dev_error;
 133         }
 134         /*
 135          * This PMD always claims the write memory barrier on UAR
 136          * registers writings, it is safe to allocate UAR with any
 137          * memory mapping type.
 138          */
 139         priv->uar = mlx5_devx_alloc_uar(priv->cdev->ctx, -1);
 140         if (!priv->uar) {
 141                 DRV_LOG(ERR, "can't allocate uar.");
 142                 rte_errno = ENOMEM;
 143                 goto error;
 144         }
 145         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 146         priv->regexdev->enqueue = mlx5_regexdev_enqueue;
 147 #ifdef HAVE_MLX5_UMR_IMKEY
 148         if (!attr->umr_indirect_mkey_disabled &&
 149             !attr->umr_modify_entity_size_disabled)
 150                 priv->has_umr = 1;
 151         if (priv->has_umr)
 152                 priv->regexdev->enqueue = mlx5_regexdev_enqueue_gga;
 153 #endif
 154         priv->regexdev->dequeue = mlx5_regexdev_dequeue;
 155         priv->regexdev->device = cdev->dev;
 156         priv->regexdev->data->dev_private = priv;
 157         priv->regexdev->state = RTE_REGEXDEV_READY;
 158         DRV_LOG(INFO, "RegEx GGA is %s.",
 159                 priv->has_umr ? "supported" : "unsupported");
 160         return 0;
 161
 162 error:
 163         if (priv->uar)
 164                 mlx5_glue->devx_free_uar(priv->uar);
 165         if (priv->regexdev)
 166                 rte_regexdev_unregister(priv->regexdev);
 167 dev_error:
 168         if (priv)
 169                 rte_free(priv);
 170         return -rte_errno;
 171 }
 172
 173 static int
 174 mlx5_regex_dev_remove(struct mlx5_common_device *cdev)
 175 {
 176         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 177         struct rte_regexdev *dev;
 178         struct mlx5_regex_priv *priv = NULL;
 179
 180         mlx5_regex_get_name(name, cdev->dev);
 181         dev = rte_regexdev_get_device_by_name(name);
 182         if (!dev)
 183                 return 0;
 184         priv = dev->data->dev_private;
 185         if (priv) {
 186                 if (priv->uar)
 187                         mlx5_glue->devx_free_uar(priv->uar);
 188                 if (priv->regexdev)
 189                         rte_regexdev_unregister(priv->regexdev);
 190                 rte_free(priv);
 191         }
 192         return 0;
 193 }
 194
 195 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 196         {
 197                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 198                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 199         },
 200         {
 201                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 202                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF)
 203         },
 204         {
 205                 .vendor_id = 0
 206         }
 207 };
 208
 209 static struct mlx5_class_driver mlx5_regex_driver = {
 210         .drv_class = MLX5_CLASS_REGEX,
 211         .name = RTE_STR(MLX5_REGEX_DRIVER_NAME),
 212         .id_table = mlx5_regex_pci_id_map,
 213         .probe = mlx5_regex_dev_probe,
 214         .remove = mlx5_regex_dev_remove,
 215 };
 216
 217 RTE_INIT(rte_mlx5_regex_init)
 218 {
 219         mlx5_common_init();
 220         if (mlx5_glue)
 221                 mlx5_class_driver_register(&mlx5_regex_driver);
 222 }
 223
 224 RTE_LOG_REGISTER_DEFAULT(mlx5_regex_logtype, NOTICE)
 225 RTE_PMD_EXPORT_NAME(MLX5_REGEX_DRIVER_NAME, __COUNTER__);
 226 RTE_PMD_REGISTER_PCI_TABLE(MLX5_REGEX_DRIVER_NAME, mlx5_regex_pci_id_map);
 227 RTE_PMD_REGISTER_KMOD_DEP(MLX5_REGEX_DRIVER_NAME, "* ib_uverbs & mlx5_core & mlx5_ib");