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 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  24         .dev_info_get = mlx5_regex_info_get,
  25 };
  26
  27 static struct ibv_device *
  28 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  29 {
  30         int n;
  31         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  32         struct ibv_device *ibv_match = NULL;
  33
  34         if (!ibv_list) {
  35                 rte_errno = ENOSYS;
  36                 return NULL;
  37         }
  38         while (n-- > 0) {
  39                 struct rte_pci_addr pci_addr;
  40
  41                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  42                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  43                         continue;
  44                 if (rte_pci_addr_cmp(addr, &pci_addr))
  45                         continue;
  46                 ibv_match = ibv_list[n];
  47                 break;
  48         }
  49         if (!ibv_match)
  50                 rte_errno = ENOENT;
  51         mlx5_glue->free_device_list(ibv_list);
  52         return ibv_match;
  53 }
  54
  55 static void
  56 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
  57 {
  58         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
  59                 pci_dev->addr.devid, pci_dev->addr.function);
  60 }
  61
  62 static int
  63 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
  64                      struct rte_pci_device *pci_dev)
  65 {
  66         struct ibv_device *ibv;
  67         struct mlx5_regex_priv *priv = NULL;
  68         struct ibv_context *ctx = NULL;
  69         struct mlx5_hca_attr attr;
  70         char name[RTE_REGEXDEV_NAME_MAX_LEN];
  71         int ret;
  72
  73         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
  74         if (!ibv) {
  75                 DRV_LOG(ERR, "No matching IB device for PCI slot "
  76                         PCI_PRI_FMT ".", pci_dev->addr.domain,
  77                         pci_dev->addr.bus, pci_dev->addr.devid,
  78                         pci_dev->addr.function);
  79                 return -rte_errno;
  80         }
  81         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
  82                 ibv->name);
  83         ctx = mlx5_glue->dv_open_device(ibv);
  84         if (!ctx) {
  85                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
  86                 rte_errno = ENODEV;
  87                 return -rte_errno;
  88         }
  89         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
  90         if (ret) {
  91                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
  92                 rte_errno = ENOTSUP;
  93                 goto error;
  94         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
  95                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
  96                         "old FW/OFED version?");
  97                 rte_errno = ENOTSUP;
  98                 goto error;
  99         }
 100         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 101                            RTE_CACHE_LINE_SIZE);
 102         if (!priv) {
 103                 DRV_LOG(ERR, "Failed to allocate private memory.");
 104                 rte_errno = ENOMEM;
 105                 goto error;
 106         }
 107         priv->ctx = ctx;
 108         mlx5_regex_get_name(name, pci_dev);
 109         priv->regexdev = rte_regexdev_register(name);
 110         if (priv->regexdev == NULL) {
 111                 DRV_LOG(ERR, "Failed to register RegEx device.");
 112                 rte_errno = rte_errno ? rte_errno : EINVAL;
 113                 goto error;
 114         }
 115         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 116         priv->regexdev->device = (struct rte_device *)pci_dev;
 117         priv->regexdev->data->dev_private = priv;
 118         return 0;
 119
 120 error:
 121         if (ctx)
 122                 mlx5_glue->close_device(ctx);
 123         if (priv)
 124                 rte_free(priv);
 125         return -rte_errno;
 126 }
 127
 128 static int
 129 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 130 {
 131         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 132         struct rte_regexdev *dev;
 133         struct mlx5_regex_priv *priv = NULL;
 134
 135         mlx5_regex_get_name(name, pci_dev);
 136         dev = rte_regexdev_get_device_by_name(name);
 137         if (!dev)
 138                 return 0;
 139         priv = dev->data->dev_private;
 140         if (priv) {
 141                 if (priv->ctx)
 142                         mlx5_glue->close_device(priv->ctx);
 143                 if (priv->regexdev)
 144                         rte_regexdev_unregister(priv->regexdev);
 145                 rte_free(priv);
 146         }
 147         return 0;
 148 }
 149
 150 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 151         {
 152                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 153                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 154         },
 155         {
 156                 .vendor_id = 0
 157         }
 158 };
 159
 160 static struct rte_pci_driver mlx5_regex_driver = {
 161         .driver = {
 162                 .name = "mlx5_regex",
 163         },
 164         .id_table = mlx5_regex_pci_id_map,
 165         .probe = mlx5_regex_pci_probe,
 166         .remove = mlx5_regex_pci_remove,
 167         .drv_flags = 0,
 168 };
 169
 170 RTE_INIT(rte_mlx5_regex_init)
 171 {
 172         if (mlx5_glue)
 173                 rte_pci_register(&mlx5_regex_driver);
 174 }
 175
 176 RTE_LOG_REGISTER(mlx5_regex_logtype, pmd.regex.mlx5, NOTICE)
 177 RTE_PMD_EXPORT_NAME(net_mlx5_regex, __COUNTER__);
 178 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_regex, mlx5_regex_pci_id_map);
 179 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_regex, "* ib_uverbs & mlx5_core & mlx5_ib");