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