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_bus_pci.h>
   9 #include <rte_pci.h>
  10 #include <rte_regexdev.h>
  11 #include <rte_regexdev_core.h>
  12 #include <rte_regexdev_driver.h>
  13
  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 int mlx5_regex_logtype;
  23
  24 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  25         .dev_info_get = mlx5_regex_info_get,
  26         .dev_configure = mlx5_regex_configure,
  27         .dev_db_import = mlx5_regex_rules_db_import,
  28         .dev_qp_setup = mlx5_regex_qp_setup,
  29 };
  30
  31 static struct ibv_device *
  32 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  33 {
  34         int n;
  35         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  36         struct ibv_device *ibv_match = NULL;
  37
  38         if (!ibv_list) {
  39                 rte_errno = ENOSYS;
  40                 return NULL;
  41         }
  42         while (n-- > 0) {
  43                 struct rte_pci_addr pci_addr;
  44
  45                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  46                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  47                         continue;
  48                 if (rte_pci_addr_cmp(addr, &pci_addr))
  49                         continue;
  50                 ibv_match = ibv_list[n];
  51                 break;
  52         }
  53         if (!ibv_match)
  54                 rte_errno = ENOENT;
  55         mlx5_glue->free_device_list(ibv_list);
  56         return ibv_match;
  57 }
  58 static int
  59 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  60 {
  61         uint32_t fpga_ident = 0;
  62         int err;
  63         int i;
  64
  65         for (i = 0; i < num_engines; i++) {
  66                 err = mlx5_devx_regex_register_read(ctx, i,
  67                                                     MLX5_RXP_CSR_IDENTIFIER,
  68                                                     &fpga_ident);
  69                 fpga_ident = (fpga_ident & (0x0000FFFF));
  70                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  71                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  72                                 "memory 0x%x", i, err, fpga_ident);
  73                         if (!err)
  74                                 err = EINVAL;
  75                         return err;
  76                 }
  77         }
  78         return 0;
  79 }
  80
  81 static void
  82 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
  83 {
  84         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
  85                 pci_dev->addr.devid, pci_dev->addr.function);
  86 }
  87
  88 static int
  89 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
  90                      struct rte_pci_device *pci_dev)
  91 {
  92         struct ibv_device *ibv;
  93         struct mlx5_regex_priv *priv = NULL;
  94         struct ibv_context *ctx = NULL;
  95         struct mlx5_hca_attr attr;
  96         char name[RTE_REGEXDEV_NAME_MAX_LEN];
  97         int ret;
  98
  99         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
 100         if (!ibv) {
 101                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 102                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 103                         pci_dev->addr.bus, pci_dev->addr.devid,
 104                         pci_dev->addr.function);
 105                 return -rte_errno;
 106         }
 107         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 108                 ibv->name);
 109         ctx = mlx5_glue->dv_open_device(ibv);
 110         if (!ctx) {
 111                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 112                 rte_errno = ENODEV;
 113                 return -rte_errno;
 114         }
 115         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 116         if (ret) {
 117                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 118                 rte_errno = ENOTSUP;
 119                 goto error;
 120         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
 121                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
 122                         "old FW/OFED version?");
 123                 rte_errno = ENOTSUP;
 124                 goto error;
 125         }
 126         if (mlx5_regex_engines_status(ctx, 2)) {
 127                 DRV_LOG(ERR, "RegEx engine error.");
 128                 rte_errno = ENOMEM;
 129                 goto error;
 130         }
 131         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 132                            RTE_CACHE_LINE_SIZE);
 133         if (!priv) {
 134                 DRV_LOG(ERR, "Failed to allocate private memory.");
 135                 rte_errno = ENOMEM;
 136                 goto error;
 137         }
 138         priv->ctx = ctx;
 139         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 140         /* Default RXP programming mode to Shared. */
 141         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 142         mlx5_regex_get_name(name, pci_dev);
 143         priv->regexdev = rte_regexdev_register(name);
 144         if (priv->regexdev == NULL) {
 145                 DRV_LOG(ERR, "Failed to register RegEx device.");
 146                 rte_errno = rte_errno ? rte_errno : EINVAL;
 147                 goto error;
 148         }
 149         ret = mlx5_glue->devx_query_eqn(ctx, 0, &priv->eqn);
 150         if (ret) {
 151                 DRV_LOG(ERR, "can't query event queue number.");
 152                 rte_errno = ENOMEM;
 153                 goto error;
 154         }
 155         priv->uar = mlx5_glue->devx_alloc_uar(ctx, 0);
 156         if (!priv->uar) {
 157                 DRV_LOG(ERR, "can't allocate uar.");
 158                 rte_errno = ENOMEM;
 159                 goto error;
 160         }
 161         priv->pd = mlx5_glue->alloc_pd(ctx);
 162         if (!priv->pd) {
 163                 DRV_LOG(ERR, "can't allocate pd.");
 164                 rte_errno = ENOMEM;
 165                 goto error;
 166         }
 167         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 168         priv->regexdev->enqueue = mlx5_regexdev_enqueue;
 169         priv->regexdev->device = (struct rte_device *)pci_dev;
 170         priv->regexdev->data->dev_private = priv;
 171         priv->regexdev->state = RTE_REGEXDEV_READY;
 172         return 0;
 173
 174 error:
 175         if (priv->pd)
 176                 mlx5_glue->dealloc_pd(priv->pd);
 177         if (priv->uar)
 178                 mlx5_glue->devx_free_uar(priv->uar);
 179         if (priv->regexdev)
 180                 rte_regexdev_unregister(priv->regexdev);
 181         if (ctx)
 182                 mlx5_glue->close_device(ctx);
 183         if (priv)
 184                 rte_free(priv);
 185         return -rte_errno;
 186 }
 187
 188 static int
 189 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 190 {
 191         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 192         struct rte_regexdev *dev;
 193         struct mlx5_regex_priv *priv = NULL;
 194
 195         mlx5_regex_get_name(name, pci_dev);
 196         dev = rte_regexdev_get_device_by_name(name);
 197         if (!dev)
 198                 return 0;
 199         priv = dev->data->dev_private;
 200         if (priv) {
 201                 if (priv->pd)
 202                         mlx5_glue->dealloc_pd(priv->pd);
 203                 if (priv->uar)
 204                         mlx5_glue->devx_free_uar(priv->uar);
 205                 if (priv->regexdev)
 206                         rte_regexdev_unregister(priv->regexdev);
 207                 if (priv->ctx)
 208                         mlx5_glue->close_device(priv->ctx);
 209                 if (priv->regexdev)
 210                         rte_regexdev_unregister(priv->regexdev);
 211                 rte_free(priv);
 212         }
 213         return 0;
 214 }
 215
 216 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 217         {
 218                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 219                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 220         },
 221         {
 222                 .vendor_id = 0
 223         }
 224 };
 225
 226 static struct rte_pci_driver mlx5_regex_driver = {
 227         .driver = {
 228                 .name = "mlx5_regex",
 229         },
 230         .id_table = mlx5_regex_pci_id_map,
 231         .probe = mlx5_regex_pci_probe,
 232         .remove = mlx5_regex_pci_remove,
 233         .drv_flags = 0,
 234 };
 235
 236 RTE_INIT(rte_mlx5_regex_init)
 237 {
 238         if (mlx5_glue)
 239                 rte_pci_register(&mlx5_regex_driver);
 240 }
 241
 242 RTE_LOG_REGISTER(mlx5_regex_logtype, pmd.regex.mlx5, NOTICE)
 243 RTE_PMD_EXPORT_NAME(net_mlx5_regex, __COUNTER__);
 244 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_regex, mlx5_regex_pci_id_map);
 245 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_regex, "* ib_uverbs & mlx5_core & mlx5_ib");