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
  21 int mlx5_regex_logtype;
  22
  23 static const struct rte_regexdev_ops mlx5_regexdev_ops = {0};
  24
  25 static struct ibv_device *
  26 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  27 {
  28         int n;
  29         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  30         struct ibv_device *ibv_match = NULL;
  31
  32         if (!ibv_list) {
  33                 rte_errno = ENOSYS;
  34                 return NULL;
  35         }
  36         while (n-- > 0) {
  37                 struct rte_pci_addr pci_addr;
  38
  39                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  40                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  41                         continue;
  42                 if (rte_pci_addr_cmp(addr, &pci_addr))
  43                         continue;
  44                 ibv_match = ibv_list[n];
  45                 break;
  46         }
  47         if (!ibv_match)
  48                 rte_errno = ENOENT;
  49         mlx5_glue->free_device_list(ibv_list);
  50         return ibv_match;
  51 }
  52
  53 static void
  54 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
  55 {
  56         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
  57                 pci_dev->addr.devid, pci_dev->addr.function);
  58 }
  59
  60 static int
  61 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
  62                      struct rte_pci_device *pci_dev)
  63 {
  64         struct ibv_device *ibv;
  65         struct mlx5_regex_priv *priv = NULL;
  66         struct ibv_context *ctx = NULL;
  67         struct mlx5_hca_attr attr;
  68         char name[RTE_REGEXDEV_NAME_MAX_LEN];
  69         int ret;
  70
  71         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
  72         if (!ibv) {
  73                 DRV_LOG(ERR, "No matching IB device for PCI slot "
  74                         PCI_PRI_FMT ".", pci_dev->addr.domain,
  75                         pci_dev->addr.bus, pci_dev->addr.devid,
  76                         pci_dev->addr.function);
  77                 return -rte_errno;
  78         }
  79         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
  80                 ibv->name);
  81         ctx = mlx5_glue->dv_open_device(ibv);
  82         if (!ctx) {
  83                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
  84                 rte_errno = ENODEV;
  85                 return -rte_errno;
  86         }
  87         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
  88         if (ret) {
  89                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
  90                 rte_errno = ENOTSUP;
  91                 goto error;
  92         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
  93                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
  94                         "old FW/OFED version?");
  95                 rte_errno = ENOTSUP;
  96                 goto error;
  97         }
  98         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
  99                            RTE_CACHE_LINE_SIZE);
 100         if (!priv) {
 101                 DRV_LOG(ERR, "Failed to allocate private memory.");
 102                 rte_errno = ENOMEM;
 103                 goto error;
 104         }
 105         priv->ctx = ctx;
 106         mlx5_regex_get_name(name, pci_dev);
 107         priv->regexdev = rte_regexdev_register(name);
 108         if (priv->regexdev == NULL) {
 109                 DRV_LOG(ERR, "Failed to register RegEx device.");
 110                 rte_errno = rte_errno ? rte_errno : EINVAL;
 111                 goto error;
 112         }
 113         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 114         priv->regexdev->device = (struct rte_device *)pci_dev;
 115         priv->regexdev->data->dev_private = priv;
 116         return 0;
 117
 118 error:
 119         if (ctx)
 120                 mlx5_glue->close_device(ctx);
 121         if (priv)
 122                 rte_free(priv);
 123         return -rte_errno;
 124 }
 125
 126 static int
 127 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 128 {
 129         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 130         struct rte_regexdev *dev;
 131         struct mlx5_regex_priv *priv = NULL;
 132
 133         mlx5_regex_get_name(name, pci_dev);
 134         dev = rte_regexdev_get_device_by_name(name);
 135         if (!dev)
 136                 return 0;
 137         priv = dev->data->dev_private;
 138         if (priv) {
 139                 if (priv->ctx)
 140                         mlx5_glue->close_device(priv->ctx);
 141                 if (priv->regexdev)
 142                         rte_regexdev_unregister(priv->regexdev);
 143                 rte_free(priv);
 144         }
 145         return 0;
 146 }
 147
 148 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 149         {
 150                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 151                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 152         },
 153         {
 154                 .vendor_id = 0
 155         }
 156 };
 157
 158 static struct rte_pci_driver mlx5_regex_driver = {
 159         .driver = {
 160                 .name = "mlx5_regex",
 161         },
 162         .id_table = mlx5_regex_pci_id_map,
 163         .probe = mlx5_regex_pci_probe,
 164         .remove = mlx5_regex_pci_remove,
 165         .drv_flags = 0,
 166 };
 167
 168 RTE_INIT(rte_mlx5_regex_init)
 169 {
 170         if (mlx5_glue)
 171                 rte_pci_register(&mlx5_regex_driver);
 172 }
 173
 174 RTE_LOG_REGISTER(mlx5_regex_logtype, pmd.regex.mlx5, NOTICE)
 175 RTE_PMD_EXPORT_NAME(net_mlx5_regex, __COUNTER__);
 176 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_regex, mlx5_regex_pci_id_map);
 177 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_regex, "* ib_uverbs & mlx5_core & mlx5_ib");