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_pci.h>
   9 #include <rte_regexdev.h>
  10 #include <rte_regexdev_core.h>
  11 #include <rte_regexdev_driver.h>
  12
  13 #include <mlx5_common_pci.h>
  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 #define MLX5_REGEX_DRIVER_NAME regex_mlx5
  23 #define MLX5_REGEX_LOG_NAME    pmd.regex.mlx5
  24
  25 int mlx5_regex_logtype;
  26
  27 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  28         .dev_info_get = mlx5_regex_info_get,
  29         .dev_configure = mlx5_regex_configure,
  30         .dev_db_import = mlx5_regex_rules_db_import,
  31         .dev_qp_setup = mlx5_regex_qp_setup,
  32         .dev_start = mlx5_regex_start,
  33         .dev_stop = mlx5_regex_stop,
  34         .dev_close = mlx5_regex_close,
  35 };
  36
  37 int
  38 mlx5_regex_start(struct rte_regexdev *dev __rte_unused)
  39 {
  40         return 0;
  41 }
  42
  43 int
  44 mlx5_regex_stop(struct rte_regexdev *dev __rte_unused)
  45 {
  46         return 0;
  47 }
  48
  49 int
  50 mlx5_regex_close(struct rte_regexdev *dev __rte_unused)
  51 {
  52         return 0;
  53 }
  54
  55 static struct ibv_device *
  56 mlx5_regex_get_ib_device_match(struct rte_pci_addr *addr)
  57 {
  58         int n;
  59         struct ibv_device **ibv_list = mlx5_glue->get_device_list(&n);
  60         struct ibv_device *ibv_match = NULL;
  61
  62         if (!ibv_list) {
  63                 rte_errno = ENOSYS;
  64                 return NULL;
  65         }
  66         while (n-- > 0) {
  67                 struct rte_pci_addr pci_addr;
  68
  69                 DRV_LOG(DEBUG, "Checking device \"%s\"..", ibv_list[n]->name);
  70                 if (mlx5_dev_to_pci_addr(ibv_list[n]->ibdev_path, &pci_addr))
  71                         continue;
  72                 if (rte_pci_addr_cmp(addr, &pci_addr))
  73                         continue;
  74                 ibv_match = ibv_list[n];
  75                 break;
  76         }
  77         if (!ibv_match)
  78                 rte_errno = ENOENT;
  79         mlx5_glue->free_device_list(ibv_list);
  80         return ibv_match;
  81 }
  82 static int
  83 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  84 {
  85         uint32_t fpga_ident = 0;
  86         int err;
  87         int i;
  88
  89         for (i = 0; i < num_engines; i++) {
  90                 err = mlx5_devx_regex_register_read(ctx, i,
  91                                                     MLX5_RXP_CSR_IDENTIFIER,
  92                                                     &fpga_ident);
  93                 fpga_ident = (fpga_ident & (0x0000FFFF));
  94                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  95                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  96                                 "memory 0x%x", i, err, fpga_ident);
  97                         if (!err)
  98                                 err = EINVAL;
  99                         return err;
 100                 }
 101         }
 102         return 0;
 103 }
 104
 105 static void
 106 mlx5_regex_get_name(char *name, struct rte_pci_device *pci_dev __rte_unused)
 107 {
 108         sprintf(name, "mlx5_regex_%02x:%02x.%02x", pci_dev->addr.bus,
 109                 pci_dev->addr.devid, pci_dev->addr.function);
 110 }
 111
 112 static int
 113 mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 114                      struct rte_pci_device *pci_dev)
 115 {
 116         struct ibv_device *ibv;
 117         struct mlx5_regex_priv *priv = NULL;
 118         struct ibv_context *ctx = NULL;
 119         struct mlx5_hca_attr attr;
 120         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 121         int ret;
 122
 123         ibv = mlx5_regex_get_ib_device_match(&pci_dev->addr);
 124         if (!ibv) {
 125                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 126                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 127                         pci_dev->addr.bus, pci_dev->addr.devid,
 128                         pci_dev->addr.function);
 129                 return -rte_errno;
 130         }
 131         DRV_LOG(INFO, "PCI information matches for device \"%s\".",
 132                 ibv->name);
 133         ctx = mlx5_glue->dv_open_device(ibv);
 134         if (!ctx) {
 135                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 136                 rte_errno = ENODEV;
 137                 return -rte_errno;
 138         }
 139         ret = mlx5_devx_cmd_query_hca_attr(ctx, &attr);
 140         if (ret) {
 141                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 142                 rte_errno = ENOTSUP;
 143                 goto dev_error;
 144         } else if (!attr.regex || attr.regexp_num_of_engines == 0) {
 145                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
 146                         "old FW/OFED version?");
 147                 rte_errno = ENOTSUP;
 148                 goto dev_error;
 149         }
 150         if (mlx5_regex_engines_status(ctx, 2)) {
 151                 DRV_LOG(ERR, "RegEx engine error.");
 152                 rte_errno = ENOMEM;
 153                 goto dev_error;
 154         }
 155         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 156                            RTE_CACHE_LINE_SIZE);
 157         if (!priv) {
 158                 DRV_LOG(ERR, "Failed to allocate private memory.");
 159                 rte_errno = ENOMEM;
 160                 goto dev_error;
 161         }
 162         priv->ctx = ctx;
 163         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 164         /* Default RXP programming mode to Shared. */
 165         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 166         mlx5_regex_get_name(name, pci_dev);
 167         priv->regexdev = rte_regexdev_register(name);
 168         if (priv->regexdev == NULL) {
 169                 DRV_LOG(ERR, "Failed to register RegEx device.");
 170                 rte_errno = rte_errno ? rte_errno : EINVAL;
 171                 goto error;
 172         }
 173         ret = mlx5_glue->devx_query_eqn(ctx, 0, &priv->eqn);
 174         if (ret) {
 175                 DRV_LOG(ERR, "can't query event queue number.");
 176                 rte_errno = ENOMEM;
 177                 goto error;
 178         }
 179         /*
 180          * This PMD always claims the write memory barrier on UAR
 181          * registers writings, it is safe to allocate UAR with any
 182          * memory mapping type.
 183          */
 184         priv->uar = mlx5_devx_alloc_uar(ctx, -1);
 185         if (!priv->uar) {
 186                 DRV_LOG(ERR, "can't allocate uar.");
 187                 rte_errno = ENOMEM;
 188                 goto error;
 189         }
 190         priv->pd = mlx5_glue->alloc_pd(ctx);
 191         if (!priv->pd) {
 192                 DRV_LOG(ERR, "can't allocate pd.");
 193                 rte_errno = ENOMEM;
 194                 goto error;
 195         }
 196         priv->regexdev->dev_ops = &mlx5_regexdev_ops;
 197         priv->regexdev->enqueue = mlx5_regexdev_enqueue;
 198         priv->regexdev->dequeue = mlx5_regexdev_dequeue;
 199         priv->regexdev->device = (struct rte_device *)pci_dev;
 200         priv->regexdev->data->dev_private = priv;
 201         priv->regexdev->state = RTE_REGEXDEV_READY;
 202         priv->mr_scache.reg_mr_cb = mlx5_common_verbs_reg_mr;
 203         priv->mr_scache.dereg_mr_cb = mlx5_common_verbs_dereg_mr;
 204         ret = mlx5_mr_btree_init(&priv->mr_scache.cache,
 205                                  MLX5_MR_BTREE_CACHE_N * 2,
 206                                  rte_socket_id());
 207         if (ret) {
 208                 DRV_LOG(ERR, "MR init tree failed.");
 209             rte_errno = ENOMEM;
 210                 goto error;
 211         }
 212         return 0;
 213
 214 error:
 215         if (priv->pd)
 216                 mlx5_glue->dealloc_pd(priv->pd);
 217         if (priv->uar)
 218                 mlx5_glue->devx_free_uar(priv->uar);
 219         if (priv->regexdev)
 220                 rte_regexdev_unregister(priv->regexdev);
 221 dev_error:
 222         if (ctx)
 223                 mlx5_glue->close_device(ctx);
 224         if (priv)
 225                 rte_free(priv);
 226         return -rte_errno;
 227 }
 228
 229 static int
 230 mlx5_regex_pci_remove(struct rte_pci_device *pci_dev)
 231 {
 232         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 233         struct rte_regexdev *dev;
 234         struct mlx5_regex_priv *priv = NULL;
 235
 236         mlx5_regex_get_name(name, pci_dev);
 237         dev = rte_regexdev_get_device_by_name(name);
 238         if (!dev)
 239                 return 0;
 240         priv = dev->data->dev_private;
 241         if (priv) {
 242                 if (priv->pd)
 243                         mlx5_glue->dealloc_pd(priv->pd);
 244                 if (priv->uar)
 245                         mlx5_glue->devx_free_uar(priv->uar);
 246                 if (priv->regexdev)
 247                         rte_regexdev_unregister(priv->regexdev);
 248                 if (priv->ctx)
 249                         mlx5_glue->close_device(priv->ctx);
 250                 if (priv->regexdev)
 251                         rte_regexdev_unregister(priv->regexdev);
 252                 rte_free(priv);
 253         }
 254         return 0;
 255 }
 256
 257 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 258         {
 259                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 260                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 261         },
 262         {
 263                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 264                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF)
 265         },
 266         {
 267                 .vendor_id = 0
 268         }
 269 };
 270
 271 static struct mlx5_pci_driver mlx5_regex_driver = {
 272         .driver_class = MLX5_CLASS_REGEX,
 273         .pci_driver = {
 274                 .driver = {
 275                         .name = RTE_STR(MLX5_REGEX_DRIVER_NAME),
 276                 },
 277                 .id_table = mlx5_regex_pci_id_map,
 278                 .probe = mlx5_regex_pci_probe,
 279                 .remove = mlx5_regex_pci_remove,
 280                 .drv_flags = 0,
 281         },
 282 };
 283
 284 RTE_INIT(rte_mlx5_regex_init)
 285 {
 286         mlx5_common_init();
 287         if (mlx5_glue)
 288                 mlx5_pci_driver_register(&mlx5_regex_driver);
 289 }
 290
 291 RTE_LOG_REGISTER(mlx5_regex_logtype, MLX5_REGEX_LOG_NAME, NOTICE)
 292 RTE_PMD_EXPORT_NAME(MLX5_REGEX_DRIVER_NAME, __COUNTER__);
 293 RTE_PMD_REGISTER_PCI_TABLE(MLX5_REGEX_DRIVER_NAME, mlx5_regex_pci_id_map);
 294 RTE_PMD_REGISTER_KMOD_DEP(MLX5_REGEX_DRIVER_NAME, "* ib_uverbs & mlx5_core & mlx5_ib");