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         .dev_qp_setup = mlx5_regex_qp_setup,
  29         .dev_start = mlx5_regex_start,
  30         .dev_stop = mlx5_regex_stop,
  31         .dev_close = mlx5_regex_close,
  32 };
  33
  34 int
  35 mlx5_regex_start(struct rte_regexdev *dev __rte_unused)
  36 {
  37         return 0;
  38 }
  39
  40 int
  41 mlx5_regex_stop(struct rte_regexdev *dev __rte_unused)
  42 {
  43         return 0;
  44 }
  45
  46 int
  47 mlx5_regex_close(struct rte_regexdev *dev __rte_unused)
  48 {
  49         return 0;
  50 }
  51
  52 static struct ibv_device *
  53 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  54 {
  55         int n;
  56         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  57         struct ibv_device *ibv_match = NULL;
  58
  59         if (!ibv_list) {
  60                 rte_errno = ENOSYS;
  61                 return NULL;
  62         }
  63         while (n-- > 0) {
  64                 struct rte_pci_addr pci_addr;
  65
  66                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  67                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  68                         continue;
  69                 if (rte_pci_addr_cmp(addr, &pci_addr))
  70                         continue;
  71                 ibv_match = ibv_list[n];
  72                 break;
  73         }
  74         if (!ibv_match)
  75                 rte_errno = ENOENT;
  76         mlx5_glue->free_device_list(ibv_list);
  77         return ibv_match;
  78 }
  79 static int
  80 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  81 {
  82         uint32_t fpga_ident = 0;
  83         int err;
  84         int i;
  85
  86         for (i = 0; i < num_engines; i++) {
  87                 err = mlx5_devx_regex_register_read(ctx, i,
  88                                                     MLX5_RXP_CSR_IDENTIFIER,
  89                                                     &fpga_ident);
  90                 fpga_ident = (fpga_ident & (0x0000FFFF));
  91                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  92                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  93                                 "memory 0x%x", i, err, fpga_ident);
  94                         if (!err)
  95                                 err = EINVAL;
  96                         return err;
  97                 }
  98         }
  99         return 0;
 100 }
 101
 102 static void
 103 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
 104 {
 105         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
 106                 pci_dev->addr.devid, pci_dev->addr.function);
 107 }
 108
 109 static int
 110 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 111                      struct rte_pci_device *pci_dev)
 112 {
 113         struct ibv_device *ibv;
 114         struct mlx5_regex_priv *priv = NULL;
 115         struct ibv_context *ctx = NULL;
 116         struct mlx5_hca_attr attr;
 117         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 118         int ret;
 119
 120         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
 121         if (!ibv) {
 122                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 123                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 124                         pci_dev->addr.bus, pci_dev->addr.devid,
 125                         pci_dev->addr.function);
 126                 return -rte_errno;
 127         }
 128         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 129                 ibv->name);
 130         ctx = mlx5_glue->dv_open_device(ibv);
 131         if (!ctx) {
 132                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 133                 rte_errno = ENODEV;
 134                 return -rte_errno;
 135         }
 136         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 137         if (ret) {
 138                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 139                 rte_errno = ENOTSUP;
 140                 goto dev_error;
 141         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
 142                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
 143                         "old FW/OFED version?");
 144                 rte_errno = ENOTSUP;
 145                 goto dev_error;
 146         }
 147         if (mlx5_regex_engines_status(ctx, 2)) {
 148                 DRV_LOG(ERR, "RegEx engine error.");
 149                 rte_errno = ENOMEM;
 150                 goto dev_error;
 151         }
 152         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 153                            RTE_CACHE_LINE_SIZE);
 154         if (!priv) {
 155                 DRV_LOG(ERR, "Failed to allocate private memory.");
 156                 rte_errno = ENOMEM;
 157                 goto error;
 158         }
 159         priv->ctx = ctx;
 160         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 161         /* Default RXP programming mode to Shared. */
 162         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 163         mlx5_regex_get_name(name, pci_dev);
 164         priv->regexdev = rte_regexdev_register(name);
 165         if (priv->regexdev == NULL) {
 166                 DRV_LOG(ERR, "Failed to register RegEx device.");
 167                 rte_errno = rte_errno ? rte_errno : EINVAL;
 168                 goto error;
 169         }
 170         ret = mlx5_glue->devx_query_eqn(ctx, 0, &priv->eqn);
 171         if (ret) {
 172                 DRV_LOG(ERR, "can't query event queue number.");
 173                 rte_errno = ENOMEM;
 174                 goto error;
 175         }
 176         priv->uar = mlx5_glue->devx_alloc_uar(ctx, 0);
 177         if (!priv->uar) {
 178                 DRV_LOG(ERR, "can't allocate uar.");
 179                 rte_errno = ENOMEM;
 180                 goto error;
 181         }
 182         priv->pd = mlx5_glue->alloc_pd(ctx);
 183         if (!priv->pd) {
 184                 DRV_LOG(ERR, "can't allocate pd.");
 185                 rte_errno = ENOMEM;
 186                 goto error;
 187         }
 188         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 189         priv->regexdev->enqueue = mlx5_regexdev_enqueue;
 190         priv->regexdev->dequeue = mlx5_regexdev_dequeue;
 191         priv->regexdev->device = (struct rte_device *)pci_dev;
 192         priv->regexdev->data->dev_private = priv;
 193         priv->regexdev->state = RTE_REGEXDEV_READY;
 194         return 0;
 195
 196 error:
 197         if (priv->pd)
 198                 mlx5_glue->dealloc_pd(priv->pd);
 199         if (priv->uar)
 200                 mlx5_glue->devx_free_uar(priv->uar);
 201         if (priv->regexdev)
 202                 rte_regexdev_unregister(priv->regexdev);
 203 dev_error:
 204         if (ctx)
 205                 mlx5_glue->close_device(ctx);
 206         if (priv)
 207                 rte_free(priv);
 208         return -rte_errno;
 209 }
 210
 211 static int
 212 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 213 {
 214         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 215         struct rte_regexdev *dev;
 216         struct mlx5_regex_priv *priv = NULL;
 217
 218         mlx5_regex_get_name(name, pci_dev);
 219         dev = rte_regexdev_get_device_by_name(name);
 220         if (!dev)
 221                 return 0;
 222         priv = dev->data->dev_private;
 223         if (priv) {
 224                 if (priv->pd)
 225                         mlx5_glue->dealloc_pd(priv->pd);
 226                 if (priv->uar)
 227                         mlx5_glue->devx_free_uar(priv->uar);
 228                 if (priv->regexdev)
 229                         rte_regexdev_unregister(priv->regexdev);
 230                 if (priv->ctx)
 231                         mlx5_glue->close_device(priv->ctx);
 232                 if (priv->regexdev)
 233                         rte_regexdev_unregister(priv->regexdev);
 234                 rte_free(priv);
 235         }
 236         return 0;
 237 }
 238
 239 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 240         {
 241                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 242                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 243         },
 244         {
 245                 .vendor_id = 0
 246         }
 247 };
 248
 249 static struct rte_pci_driver mlx5_regex_driver = {
 250         .driver = {
 251                 .name = "mlx5_regex",
 252         },
 253         .id_table = mlx5_regex_pci_id_map,
 254         .probe = mlx5_regex_pci_probe,
 255         .remove = mlx5_regex_pci_remove,
 256         .drv_flags = 0,
 257 };
 258
 259 RTE_INIT(rte_mlx5_regex_init)
 260 {
 261         mlx5_common_init();
 262         if (mlx5_glue)
 263                 rte_pci_register(&mlx5_regex_driver);
 264 }
 265
 266 RTE_LOG_REGISTER(mlx5_regex_logtype, pmd.regex.mlx5, NOTICE)
 267 RTE_PMD_EXPORT_NAME(net_mlx5_regex, __COUNTER__);
 268 RTE_PMD_REGISTER_PCI_TABLE(net_mlx5_regex, mlx5_regex_pci_id_map);
 269 RTE_PMD_REGISTER_KMOD_DEP(net_mlx5_regex, "* ib_uverbs & mlx5_core & mlx5_ib");