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 #include <rte_bus_pci.h>
  13
  14 #include <mlx5_common.h>
  15 #include <mlx5_common_mr.h>
  16 #include <mlx5_glue.h>
  17 #include <mlx5_devx_cmds.h>
  18 #include <mlx5_prm.h>
  19
  20 #include "mlx5_regex.h"
  21 #include "mlx5_regex_utils.h"
  22 #include "mlx5_rxp_csrs.h"
  23
  24 #define MLX5_REGEX_DRIVER_NAME regex_mlx5
  25
  26 int mlx5_regex_logtype;
  27
  28 TAILQ_HEAD(regex_mem_event, mlx5_regex_priv) mlx5_mem_event_list =
  29                                 TAILQ_HEAD_INITIALIZER(mlx5_mem_event_list);
  30 static pthread_mutex_t mem_event_list_lock = PTHREAD_MUTEX_INITIALIZER;
  31
  32 const struct rte_regexdev_ops mlx5_regexdev_ops = {
  33         .dev_info_get = mlx5_regex_info_get,
  34         .dev_configure = mlx5_regex_configure,
  35         .dev_db_import = mlx5_regex_rules_db_import,
  36         .dev_qp_setup = mlx5_regex_qp_setup,
  37         .dev_start = mlx5_regex_start,
  38         .dev_stop = mlx5_regex_stop,
  39         .dev_close = mlx5_regex_close,
  40 };
  41
  42 int
  43 mlx5_regex_start(struct rte_regexdev *dev __rte_unused)
  44 {
  45         return 0;
  46 }
  47
  48 int
  49 mlx5_regex_stop(struct rte_regexdev *dev __rte_unused)
  50 {
  51         return 0;
  52 }
  53
  54 int
  55 mlx5_regex_close(struct rte_regexdev *dev __rte_unused)
  56 {
  57         return 0;
  58 }
  59
  60 static int
  61 mlx5_regex_engines_status(struct ibv_context *ctx, int num_engines)
  62 {
  63         uint32_t fpga_ident = 0;
  64         int err;
  65         int i;
  66
  67         for (i = 0; i < num_engines; i++) {
  68                 err = mlx5_devx_regex_register_read(ctx, i,
  69                                                     MLX5_RXP_CSR_IDENTIFIER,
  70                                                     &fpga_ident);
  71                 fpga_ident = (fpga_ident & (0x0000FFFF));
  72                 if (err || fpga_ident != MLX5_RXP_IDENTIFIER) {
  73                         DRV_LOG(ERR, "Failed setup RXP %d err %d database "
  74                                 "memory 0x%x", i, err, fpga_ident);
  75                         if (!err)
  76                                 err = EINVAL;
  77                         return err;
  78                 }
  79         }
  80         return 0;
  81 }
  82
  83 static void
  84 mlx5_regex_get_name(char *name, struct rte_device *dev)
  85 {
  86         sprintf(name, "mlx5_regex_%s", dev->name);
  87 }
  88
  89 /**
  90  * Callback for memory event.
  91  *
  92  * @param event_type
  93  *   Memory event type.
  94  * @param addr
  95  *   Address of memory.
  96  * @param len
  97  *   Size of memory.
  98  */
  99 static void
 100 mlx5_regex_mr_mem_event_cb(enum rte_mem_event event_type, const void *addr,
 101                            size_t len, void *arg __rte_unused)
 102 {
 103         struct mlx5_regex_priv *priv;
 104
 105         /* Must be called from the primary process. */
 106         MLX5_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
 107         switch (event_type) {
 108         case RTE_MEM_EVENT_FREE:
 109                 pthread_mutex_lock(&mem_event_list_lock);
 110                 /* Iterate all the existing mlx5 devices. */
 111                 TAILQ_FOREACH(priv, &mlx5_mem_event_list, mem_event_cb)
 112                         mlx5_free_mr_by_addr(&priv->mr_scache,
 113                                              mlx5_os_get_ctx_device_name
 114                                                               (priv->cdev->ctx),
 115                                              addr, len);
 116                 pthread_mutex_unlock(&mem_event_list_lock);
 117                 break;
 118         case RTE_MEM_EVENT_ALLOC:
 119         default:
 120                 break;
 121         }
 122 }
 123
 124 static int
 125 mlx5_regex_dev_probe(struct mlx5_common_device *cdev)
 126 {
 127         struct mlx5_regex_priv *priv = NULL;
 128         struct mlx5_hca_attr attr;
 129         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 130         int ret;
 131         uint32_t val;
 132
 133         ret = mlx5_devx_cmd_query_hca_attr(cdev->ctx, &attr);
 134         if (ret) {
 135                 DRV_LOG(ERR, "Unable to read HCA capabilities.");
 136                 rte_errno = ENOTSUP;
 137                 return -rte_errno;
 138         } else if (((!attr.regex) && (!attr.mmo_regex_sq_en) &&
 139                 (!attr.mmo_regex_qp_en)) || attr.regexp_num_of_engines == 0) {
 140                 DRV_LOG(ERR, "Not enough capabilities to support RegEx, maybe "
 141                         "old FW/OFED version?");
 142                 rte_errno = ENOTSUP;
 143                 return -rte_errno;
 144         }
 145         if (mlx5_regex_engines_status(cdev->ctx, 2)) {
 146                 DRV_LOG(ERR, "RegEx engine error.");
 147                 rte_errno = ENOMEM;
 148                 return -rte_errno;
 149         }
 150         priv = rte_zmalloc("mlx5 regex device private", sizeof(*priv),
 151                            RTE_CACHE_LINE_SIZE);
 152         if (!priv) {
 153                 DRV_LOG(ERR, "Failed to allocate private memory.");
 154                 rte_errno = ENOMEM;
 155                 return -rte_errno;
 156         }
 157         priv->mmo_regex_qp_cap = attr.mmo_regex_qp_en;
 158         priv->mmo_regex_sq_cap = attr.mmo_regex_sq_en;
 159         priv->qp_ts_format = attr.qp_ts_format;
 160         priv->cdev = cdev;
 161         priv->nb_engines = 2; /* attr.regexp_num_of_engines */
 162         ret = mlx5_devx_regex_register_read(priv->cdev->ctx, 0,
 163                                             MLX5_RXP_CSR_IDENTIFIER, &val);
 164         if (ret) {
 165                 DRV_LOG(ERR, "CSR read failed!");
 166                 goto dev_error;
 167         }
 168         if (val == MLX5_RXP_BF2_IDENTIFIER)
 169                 priv->is_bf2 = 1;
 170         /* Default RXP programming mode to Shared. */
 171         priv->prog_mode = MLX5_RXP_SHARED_PROG_MODE;
 172         mlx5_regex_get_name(name, cdev->dev);
 173         priv->regexdev = rte_regexdev_register(name);
 174         if (priv->regexdev == NULL) {
 175                 DRV_LOG(ERR, "Failed to register RegEx device.");
 176                 rte_errno = rte_errno ? rte_errno : EINVAL;
 177                 goto dev_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(priv->cdev->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(priv->cdev->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 #ifdef HAVE_MLX5_UMR_IMKEY
 199         if (!attr.umr_indirect_mkey_disabled &&
 200             !attr.umr_modify_entity_size_disabled)
 201                 priv->has_umr = 1;
 202         if (priv->has_umr)
 203                 priv->regexdev->enqueue = mlx5_regexdev_enqueue_gga;
 204 #endif
 205         priv->regexdev->dequeue = mlx5_regexdev_dequeue;
 206         priv->regexdev->device = cdev->dev;
 207         priv->regexdev->data->dev_private = priv;
 208         priv->regexdev->state = RTE_REGEXDEV_READY;
 209         priv->mr_scache.reg_mr_cb = mlx5_common_verbs_reg_mr;
 210         priv->mr_scache.dereg_mr_cb = mlx5_common_verbs_dereg_mr;
 211         ret = mlx5_mr_btree_init(&priv->mr_scache.cache,
 212                                  MLX5_MR_BTREE_CACHE_N * 2,
 213                                  rte_socket_id());
 214         if (ret) {
 215                 DRV_LOG(ERR, "MR init tree failed.");
 216             rte_errno = ENOMEM;
 217                 goto error;
 218         }
 219         /* Register callback function for global shared MR cache management. */
 220         if (TAILQ_EMPTY(&mlx5_mem_event_list))
 221                 rte_mem_event_callback_register("MLX5_MEM_EVENT_CB",
 222                                                 mlx5_regex_mr_mem_event_cb,
 223                                                 NULL);
 224         /* Add device to memory callback list. */
 225         pthread_mutex_lock(&mem_event_list_lock);
 226         TAILQ_INSERT_TAIL(&mlx5_mem_event_list, priv, mem_event_cb);
 227         pthread_mutex_unlock(&mem_event_list_lock);
 228         DRV_LOG(INFO, "RegEx GGA is %s.",
 229                 priv->has_umr ? "supported" : "unsupported");
 230         return 0;
 231
 232 error:
 233         if (priv->pd)
 234                 mlx5_glue->dealloc_pd(priv->pd);
 235         if (priv->uar)
 236                 mlx5_glue->devx_free_uar(priv->uar);
 237         if (priv->regexdev)
 238                 rte_regexdev_unregister(priv->regexdev);
 239 dev_error:
 240         if (priv)
 241                 rte_free(priv);
 242         return -rte_errno;
 243 }
 244
 245 static int
 246 mlx5_regex_dev_remove(struct mlx5_common_device *cdev)
 247 {
 248         char name[RTE_REGEXDEV_NAME_MAX_LEN];
 249         struct rte_regexdev *dev;
 250         struct mlx5_regex_priv *priv = NULL;
 251
 252         mlx5_regex_get_name(name, cdev->dev);
 253         dev = rte_regexdev_get_device_by_name(name);
 254         if (!dev)
 255                 return 0;
 256         priv = dev->data->dev_private;
 257         if (priv) {
 258                 /* Remove from memory callback device list. */
 259                 pthread_mutex_lock(&mem_event_list_lock);
 260                 TAILQ_REMOVE(&mlx5_mem_event_list, priv, mem_event_cb);
 261                 pthread_mutex_unlock(&mem_event_list_lock);
 262                 if (TAILQ_EMPTY(&mlx5_mem_event_list))
 263                         rte_mem_event_callback_unregister("MLX5_MEM_EVENT_CB",
 264                                                           NULL);
 265                 if (priv->mr_scache.cache.table)
 266                         mlx5_mr_release_cache(&priv->mr_scache);
 267                 if (priv->pd)
 268                         mlx5_glue->dealloc_pd(priv->pd);
 269                 if (priv->uar)
 270                         mlx5_glue->devx_free_uar(priv->uar);
 271                 if (priv->regexdev)
 272                         rte_regexdev_unregister(priv->regexdev);
 273                 rte_free(priv);
 274         }
 275         return 0;
 276 }
 277
 278 static const struct rte_pci_id mlx5_regex_pci_id_map[] = {
 279         {
 280                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 281                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 282         },
 283         {
 284                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 285                                 PCI_DEVICE_ID_MELLANOX_CONNECTX7BF)
 286         },
 287         {
 288                 .vendor_id = 0
 289         }
 290 };
 291
 292 static struct mlx5_class_driver mlx5_regex_driver = {
 293         .drv_class = MLX5_CLASS_REGEX,
 294         .name = RTE_STR(MLX5_REGEX_DRIVER_NAME),
 295         .id_table = mlx5_regex_pci_id_map,
 296         .probe = mlx5_regex_dev_probe,
 297         .remove = mlx5_regex_dev_remove,
 298 };
 299
 300 RTE_INIT(rte_mlx5_regex_init)
 301 {
 302         mlx5_common_init();
 303         if (mlx5_glue)
 304                 mlx5_class_driver_register(&mlx5_regex_driver);
 305 }
 306
 307 RTE_LOG_REGISTER_DEFAULT(mlx5_regex_logtype, NOTICE)
 308 RTE_PMD_EXPORT_NAME(MLX5_REGEX_DRIVER_NAME, __COUNTER__);
 309 RTE_PMD_REGISTER_PCI_TABLE(MLX5_REGEX_DRIVER_NAME, mlx5_regex_pci_id_map);
 310 RTE_PMD_REGISTER_KMOD_DEP(MLX5_REGEX_DRIVER_NAME, "* ib_uverbs & mlx5_core & mlx5_ib");