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