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