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
  13 #include <mlx5_common_pci.h>
  14 #include <mlx5_glue.h>
  15 #include <mlx5_devx_cmds.h>
  16 #include <mlx5_prm.h>
  17
  18 #include "mlx5_regex.h"
  19 #include "mlx5_regex_utils.h"
  20 #include "mlx5_rxp_csrs.h"
  21
  22 #define MLX5_REGEX_DRIVER_NAME regex_mlx5
  23 #define MLX5_REGEX_LOG_NAME    pmd.regex.mlx5
  24
  25 int mlx5_regex_logtype;
  26
  27 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  28         .dev_info_get = mlx5_regex_info_get,
  29         .dev_configure = mlx5_regex_configure,
  30         .dev_db_import = mlx5_regex_rules_db_import,
  31         .dev_qp_setup = mlx5_regex_qp_setup,
  32         .dev_start = mlx5_regex_start,
  33         .dev_stop = mlx5_regex_stop,
  34         .dev_close = mlx5_regex_close,
  35 };
  36
  37 int
  38 mlx5_regex_start(struct rte_regexdev *dev __rte_unused)
  39 {
  40         return 0;
  41 }
  42
  43 int
  44 mlx5_regex_stop(struct rte_regexdev *dev __rte_unused)
  45 {
  46         return 0;
  47 }
  48
  49 int
  50 mlx5_regex_close(struct rte_regexdev *dev __rte_unused)
  51 {
  52         return 0;
  53 }
  54
  55 static struct ibv_device *
  56 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  57 {
  58         int n;
  59         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  60         struct ibv_device *ibv_match = NULL;
  61
  62         if (!ibv_list) {
  63                 rte_errno = ENOSYS;
  64                 return NULL;
  65         }
  66         while (n-- > 0) {
  67                 struct rte_pci_addr pci_addr;
  68
  69                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  70                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  71                         continue;
  72                 if (rte_pci_addr_cmp(addr, &pci_addr))
  73                         continue;
  74                 ibv_match = ibv_list[n];
  75                 break;
  76         }
  77         if (!ibv_match)
  78                 rte_errno = ENOENT;
  79         mlx5_glue->free_device_list(ibv_list);
  80         return ibv_match;
  81 }
  82 static int
  83 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  84 {
  85         uint32_t fpga_ident = 0;
  86         int err;
  87         int i;
  88
  89         for (i = 0; i < num_engines; i++) {
  90                 err = mlx5_devx_regex_register_read(ctx, i,
  91                                                     MLX5_RXP_CSR_IDENTIFIER,
  92                                                     &fpga_ident);
  93                 fpga_ident = (fpga_ident & (0x0000FFFF));
  94                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  95                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  96                                 "memory 0x%x", i, err, fpga_ident);
  97                         if (!err)
  98                                 err = EINVAL;
  99                         return err;
 100                 }
 101         }
 102         return 0;
 103 }
 104
 105 static void
 106 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
 107 {
 108         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
 109                 pci_dev->addr.devid, pci_dev->addr.function);
 110 }
 111
 112 static int
 113 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 114                      struct rte_pci_device *pci_dev)
 115 {
 116         struct ibv_device *ibv;
 117         struct mlx5_regex_priv *priv = NULL;
 118         struct ibv_context *ctx = NULL;
 119         struct mlx5_hca_attr attr;
 120         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 121         int ret;
 122         uint32_t val;
 123
 124         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
 125         if (!ibv) {
 126                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 127                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 128                         pci_dev->addr.bus, pci_dev->addr.devid,
 129                         pci_dev->addr.function);
 130                 return -rte_errno;
 131         }
 132         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 133                 ibv->name);
 134         ctx = mlx5_glue->dv_open_device(ibv);
 135         if (!ctx) {
 136                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 137                 rte_errno = ENODEV;
 138                 return -rte_errno;
 139         }
 140         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 141         if (ret) {
 142                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 143                 rte_errno = ENOTSUP;
 144                 goto dev_error;
 145         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
 146                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
 147                         "old FW/OFED version?");
 148                 rte_errno = ENOTSUP;
 149                 goto dev_error;
 150         }
 151         if (mlx5_regex_engines_status(ctx, 2)) {
 152                 DRV_LOG(ERR, "RegEx engine error.");
 153                 rte_errno = ENOMEM;
 154                 goto dev_error;
 155         }
 156         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 157                            RTE_CACHE_LINE_SIZE);
 158         if (!priv) {
 159                 DRV_LOG(ERR, "Failed to allocate private memory.");
 160                 rte_errno = ENOMEM;
 161                 goto dev_error;
 162         }
 163         priv->ctx = ctx;
 164         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 165         ret = mlx5_devx_regex_register_read(priv->ctx, 0,
 166                                             MLX5_RXP_CSR_IDENTIFIER, &val);
 167         if (ret) {
 168                 DRV_LOG(ERR, "CSR read failed!");
 169                 return -1;
 170         }
 171         if (val == MLX5_RXP_BF2_IDENTIFIER)
 172                 priv->is_bf2 = 1;
 173         /* Default RXP programming mode to Shared. */
 174         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 175         mlx5_regex_get_name(name, pci_dev);
 176         priv->regexdev = rte_regexdev_register(name);
 177         if (priv->regexdev == NULL) {
 178                 DRV_LOG(ERR, "Failed to register RegEx device.");
 179                 rte_errno = rte_errno ? rte_errno : EINVAL;
 180                 goto error;
 181         }
 182         /*
 183          * This PMD always claims the write memory barrier on UAR
 184          * registers writings, it is safe to allocate UAR with any
 185          * memory mapping type.
 186          */
 187         priv->uar = mlx5_devx_alloc_uar(ctx, -1);
 188         if (!priv->uar) {
 189                 DRV_LOG(ERR, "can't allocate uar.");
 190                 rte_errno = ENOMEM;
 191                 goto error;
 192         }
 193         priv->pd = mlx5_glue->alloc_pd(ctx);
 194         if (!priv->pd) {
 195                 DRV_LOG(ERR, "can't allocate pd.");
 196                 rte_errno = ENOMEM;
 197                 goto error;
 198         }
 199         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 200         priv->regexdev->enqueue = mlx5_regexdev_enqueue;
 201         priv->regexdev->dequeue = mlx5_regexdev_dequeue;
 202         priv->regexdev->device = (struct rte_device *)pci_dev;
 203         priv->regexdev->data->dev_private = priv;
 204         priv->regexdev->state = RTE_REGEXDEV_READY;
 205         priv->mr_scache.reg_mr_cb = mlx5_common_verbs_reg_mr;
 206         priv->mr_scache.dereg_mr_cb = mlx5_common_verbs_dereg_mr;
 207         ret = mlx5_mr_btree_init(&priv->mr_scache.cache,
 208                                  MLX5_MR_BTREE_CACHE_N * 2,
 209                                  rte_socket_id());
 210         if (ret) {
 211                 DRV_LOG(ERR, "MR init tree failed.");
 212             rte_errno = ENOMEM;
 213                 goto error;
 214         }
 215         return 0;
 216
 217 error:
 218         if (priv->pd)
 219                 mlx5_glue->dealloc_pd(priv->pd);
 220         if (priv->uar)
 221                 mlx5_glue->devx_free_uar(priv->uar);
 222         if (priv->regexdev)
 223                 rte_regexdev_unregister(priv->regexdev);
 224 dev_error:
 225         if (ctx)
 226                 mlx5_glue->close_device(ctx);
 227         if (priv)
 228                 rte_free(priv);
 229         return -rte_errno;
 230 }
 231
 232 static int
 233 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 234 {
 235         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 236         struct rte_regexdev *dev;
 237         struct mlx5_regex_priv *priv = NULL;
 238
 239         mlx5_regex_get_name(name, pci_dev);
 240         dev = rte_regexdev_get_device_by_name(name);
 241         if (!dev)
 242                 return 0;
 243         priv = dev->data->dev_private;
 244         if (priv) {
 245                 if (priv->pd)
 246                         mlx5_glue->dealloc_pd(priv->pd);
 247                 if (priv->uar)
 248                         mlx5_glue->devx_free_uar(priv->uar);
 249                 if (priv->regexdev)
 250                         rte_regexdev_unregister(priv->regexdev);
 251                 if (priv->ctx)
 252                         mlx5_glue->close_device(priv->ctx);
 253                 if (priv->regexdev)
 254                         rte_regexdev_unregister(priv->regexdev);
 255                 rte_free(priv);
 256         }
 257         return 0;
 258 }
 259
 260 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 261         {
 262                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 263                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 264         },
 265         {
 266                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 267                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF)
 268         },
 269         {
 270                 .vendor_id = 0
 271         }
 272 };
 273
 274 static struct mlx5_pci_driver mlx5_regex_driver = {
 275         .driver_class = MLX5_CLASS_REGEX,
 276         .pci_driver = {
 277                 .driver = {
 278                         .name = RTE_STR(MLX5_REGEX_DRIVER_NAME),
 279                 },
 280                 .id_table = mlx5_regex_pci_id_map,
 281                 .probe = mlx5_regex_pci_probe,
 282                 .remove = mlx5_regex_pci_remove,
 283                 .drv_flags = 0,
 284         },
 285 };
 286
 287 RTE_INIT(rte_mlx5_regex_init)
 288 {
 289         mlx5_common_init();
 290         if (mlx5_glue)
 291                 mlx5_pci_driver_register(&mlx5_regex_driver);
 292 }
 293
 294 RTE_LOG_REGISTER(mlx5_regex_logtype, MLX5_REGEX_LOG_NAME, NOTICE)
 295 RTE_PMD_EXPORT_NAME(MLX5_REGEX_DRIVER_NAME, __COUNTER__);
 296 RTE_PMD_REGISTER_PCI_TABLE(MLX5_REGEX_DRIVER_NAME, mlx5_regex_pci_id_map);
 297 RTE_PMD_REGISTER_KMOD_DEP(MLX5_REGEX_DRIVER_NAME, "* ib_uverbs & mlx5_core & mlx5_ib");