drivers/net/bnxt/tf_ulp/bnxt_ulp.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019-2020 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <rte_log.h>
   7 #include <rte_malloc.h>
   8 #include <rte_flow.h>
   9 #include <rte_flow_driver.h>
  10 #include <rte_tailq.h>
  11
  12 #include "bnxt_ulp.h"
  13 #include "bnxt_tf_common.h"
  14 #include "bnxt.h"
  15 #include "tf_core.h"
  16 #include "tf_ext_flow_handle.h"
  17
  18 #include "ulp_template_db.h"
  19 #include "ulp_template_struct.h"
  20 #include "ulp_mark_mgr.h"
  21 #include "ulp_flow_db.h"
  22
  23 /* Linked list of all TF sessions. */
  24 STAILQ_HEAD(, bnxt_ulp_session_state) bnxt_ulp_session_list =
  25                         STAILQ_HEAD_INITIALIZER(bnxt_ulp_session_list);
  26
  27 /* Mutex to synchronize bnxt_ulp_session_list operations. */
  28 static pthread_mutex_t bnxt_ulp_global_mutex = PTHREAD_MUTEX_INITIALIZER;
  29
  30 /*
  31  * Allow the deletion of context only for the bnxt device that
  32  * created the session
  33  * TBD - The implementation of the function should change to
  34  * using the reference count once tf_session_attach functionality
  35  * is fixed.
  36  */
  37 bool
  38 ulp_ctx_deinit_allowed(void *ptr)
  39 {
  40         struct bnxt *bp = (struct bnxt *)ptr;
  41
  42         if (!bp)
  43                 return 0;
  44
  45         if (&bp->tfp == bp->ulp_ctx.g_tfp)
  46                 return 1;
  47
  48         return 0;
  49 }
  50
  51 /*
  52  * Initialize an ULP session.
  53  * An ULP session will contain all the resources needed to support rte flow
  54  * offloads. A session is initialized as part of rte_eth_device start.
  55  * A single vswitch instance can have multiple uplinks which means
  56  * rte_eth_device start will be called for each of these devices.
  57  * ULP session manager will make sure that a single ULP session is only
  58  * initialized once. Apart from this, it also initializes MARK database,
  59  * EEM table & flow database. ULP session manager also manages a list of
  60  * all opened ULP sessions.
  61  */
  62 static int32_t
  63 ulp_ctx_session_open(struct bnxt *bp,
  64                      struct bnxt_ulp_session_state *session)
  65 {
  66         struct rte_eth_dev              *ethdev = bp->eth_dev;
  67         int32_t                         rc = 0;
  68         struct tf_open_session_parms    params;
  69
  70         memset(&params, 0, sizeof(params));
  71
  72         rc = rte_eth_dev_get_name_by_port(ethdev->data->port_id,
  73                                           params.ctrl_chan_name);
  74         if (rc) {
  75                 BNXT_TF_DBG(ERR, "Invalid port %d, rc = %d\n",
  76                             ethdev->data->port_id, rc);
  77                 return rc;
  78         }
  79
  80         rc = tf_open_session(&bp->tfp, &params);
  81         if (rc) {
  82                 BNXT_TF_DBG(ERR, "Failed to open TF session - %s, rc = %d\n",
  83                             params.ctrl_chan_name, rc);
  84                 return -EINVAL;
  85         }
  86         session->session_opened = 1;
  87         session->g_tfp = &bp->tfp;
  88         return rc;
  89 }
  90
  91 /*
  92  * Close the ULP session.
  93  * It takes the ulp context pointer.
  94  */
  95 static void
  96 ulp_ctx_session_close(struct bnxt *bp,
  97                       struct bnxt_ulp_session_state *session)
  98 {
  99         /* close the session in the hardware */
 100         if (session->session_opened)
 101                 tf_close_session(&bp->tfp);
 102         session->session_opened = 0;
 103         session->g_tfp = NULL;
 104         bp->ulp_ctx.g_tfp = NULL;
 105 }
 106
 107 static void
 108 bnxt_init_tbl_scope_parms(struct bnxt *bp,
 109                           struct tf_alloc_tbl_scope_parms *params)
 110 {
 111         struct bnxt_ulp_device_params   *dparms;
 112         uint32_t dev_id;
 113         int rc;
 114
 115         rc = bnxt_ulp_cntxt_dev_id_get(&bp->ulp_ctx, &dev_id);
 116         if (rc)
 117                 /* TBD: For now, just use default. */
 118                 dparms = 0;
 119         else
 120                 dparms = bnxt_ulp_device_params_get(dev_id);
 121
 122         if (!dparms) {
 123                 params->rx_max_key_sz_in_bits = BNXT_ULP_DFLT_RX_MAX_KEY;
 124                 params->rx_max_action_entry_sz_in_bits =
 125                         BNXT_ULP_DFLT_RX_MAX_ACTN_ENTRY;
 126                 params->rx_mem_size_in_mb = BNXT_ULP_DFLT_RX_MEM;
 127                 params->rx_num_flows_in_k = BNXT_ULP_RX_NUM_FLOWS;
 128                 params->rx_tbl_if_id = BNXT_ULP_RX_TBL_IF_ID;
 129
 130                 params->tx_max_key_sz_in_bits = BNXT_ULP_DFLT_TX_MAX_KEY;
 131                 params->tx_max_action_entry_sz_in_bits =
 132                         BNXT_ULP_DFLT_TX_MAX_ACTN_ENTRY;
 133                 params->tx_mem_size_in_mb = BNXT_ULP_DFLT_TX_MEM;
 134                 params->tx_num_flows_in_k = BNXT_ULP_TX_NUM_FLOWS;
 135                 params->tx_tbl_if_id = BNXT_ULP_TX_TBL_IF_ID;
 136         } else {
 137                 params->rx_max_key_sz_in_bits = BNXT_ULP_DFLT_RX_MAX_KEY;
 138                 params->rx_max_action_entry_sz_in_bits =
 139                         BNXT_ULP_DFLT_RX_MAX_ACTN_ENTRY;
 140                 params->rx_mem_size_in_mb = BNXT_ULP_DFLT_RX_MEM;
 141                 params->rx_num_flows_in_k = dparms->num_flows / (1024);
 142                 params->rx_tbl_if_id = BNXT_ULP_RX_TBL_IF_ID;
 143
 144                 params->tx_max_key_sz_in_bits = BNXT_ULP_DFLT_TX_MAX_KEY;
 145                 params->tx_max_action_entry_sz_in_bits =
 146                         BNXT_ULP_DFLT_TX_MAX_ACTN_ENTRY;
 147                 params->tx_mem_size_in_mb = BNXT_ULP_DFLT_TX_MEM;
 148                 params->tx_num_flows_in_k = dparms->num_flows / (1024);
 149                 params->tx_tbl_if_id = BNXT_ULP_TX_TBL_IF_ID;
 150         }
 151 }
 152
 153 /* Initialize Extended Exact Match host memory. */
 154 static int32_t
 155 ulp_eem_tbl_scope_init(struct bnxt *bp)
 156 {
 157         struct tf_alloc_tbl_scope_parms params = {0};
 158         int rc;
 159
 160         bnxt_init_tbl_scope_parms(bp, &params);
 161
 162         rc = tf_alloc_tbl_scope(&bp->tfp, &params);
 163         if (rc) {
 164                 BNXT_TF_DBG(ERR, "Unable to allocate eem table scope rc = %d\n",
 165                             rc);
 166                 return rc;
 167         }
 168
 169         rc = bnxt_ulp_cntxt_tbl_scope_id_set(&bp->ulp_ctx, params.tbl_scope_id);
 170         if (rc) {
 171                 BNXT_TF_DBG(ERR, "Unable to set table scope id\n");
 172                 return rc;
 173         }
 174
 175         return 0;
 176 }
 177
 178 /* Free Extended Exact Match host memory */
 179 static int32_t
 180 ulp_eem_tbl_scope_deinit(struct bnxt *bp, struct bnxt_ulp_context *ulp_ctx)
 181 {
 182         struct tf_free_tbl_scope_parms  params = {0};
 183         struct tf                       *tfp;
 184         int32_t                         rc = 0;
 185
 186         if (!ulp_ctx || !ulp_ctx->cfg_data)
 187                 return -EINVAL;
 188
 189         /* Free the resources for the last device */
 190         if (!ulp_ctx_deinit_allowed(bp))
 191                 return rc;
 192
 193         tfp = bnxt_ulp_cntxt_tfp_get(ulp_ctx);
 194         if (!tfp) {
 195                 BNXT_TF_DBG(ERR, "Failed to get the truflow pointer\n");
 196                 return -EINVAL;
 197         }
 198
 199         rc = bnxt_ulp_cntxt_tbl_scope_id_get(ulp_ctx, &params.tbl_scope_id);
 200         if (rc) {
 201                 BNXT_TF_DBG(ERR, "Failed to get the table scope id\n");
 202                 return -EINVAL;
 203         }
 204
 205         rc = tf_free_tbl_scope(tfp, &params);
 206         if (rc) {
 207                 BNXT_TF_DBG(ERR, "Unable to free table scope\n");
 208                 return -EINVAL;
 209         }
 210         return rc;
 211 }
 212
 213 /* The function to free and deinit the ulp context data. */
 214 static int32_t
 215 ulp_ctx_deinit(struct bnxt *bp,
 216                struct bnxt_ulp_session_state *session)
 217 {
 218         if (!session || !bp) {
 219                 BNXT_TF_DBG(ERR, "Invalid Arguments\n");
 220                 return -EINVAL;
 221         }
 222
 223         /* close the tf session */
 224         ulp_ctx_session_close(bp, session);
 225
 226         /* Free the contents */
 227         if (session->cfg_data) {
 228                 rte_free(session->cfg_data);
 229                 bp->ulp_ctx.cfg_data = NULL;
 230                 session->cfg_data = NULL;
 231         }
 232         return 0;
 233 }
 234
 235 /* The function to allocate and initialize the ulp context data. */
 236 static int32_t
 237 ulp_ctx_init(struct bnxt *bp,
 238              struct bnxt_ulp_session_state *session)
 239 {
 240         struct bnxt_ulp_data    *ulp_data;
 241         int32_t                 rc = 0;
 242
 243         if (!session || !bp) {
 244                 BNXT_TF_DBG(ERR, "Invalid Arguments\n");
 245                 return -EINVAL;
 246         }
 247
 248         /* Allocate memory to hold ulp context data. */
 249         ulp_data = rte_zmalloc("bnxt_ulp_data",
 250                                sizeof(struct bnxt_ulp_data), 0);
 251         if (!ulp_data) {
 252                 BNXT_TF_DBG(ERR, "Failed to allocate memory for ulp data\n");
 253                 return -ENOMEM;
 254         }
 255
 256         /* Increment the ulp context data reference count usage. */
 257         bp->ulp_ctx.cfg_data = ulp_data;
 258         session->cfg_data = ulp_data;
 259         ulp_data->ref_cnt++;
 260
 261         /* Open the ulp session. */
 262         rc = ulp_ctx_session_open(bp, session);
 263         if (rc) {
 264                 (void)ulp_ctx_deinit(bp, session);
 265                 return rc;
 266         }
 267         bnxt_ulp_cntxt_tfp_set(&bp->ulp_ctx, session->g_tfp);
 268         return rc;
 269 }
 270
 271 static int32_t
 272 ulp_ctx_attach(struct bnxt_ulp_context *ulp_ctx,
 273                struct bnxt_ulp_session_state *session)
 274 {
 275         if (!ulp_ctx || !session) {
 276                 BNXT_TF_DBG(ERR, "Invalid Arguments\n");
 277                 return -EINVAL;
 278         }
 279
 280         /* Increment the ulp context data reference count usage. */
 281         ulp_ctx->cfg_data = session->cfg_data;
 282         ulp_ctx->cfg_data->ref_cnt++;
 283
 284         /* TBD call TF_session_attach. */
 285         ulp_ctx->g_tfp = session->g_tfp;
 286         return 0;
 287 }
 288
 289 static int32_t
 290 ulp_ctx_detach(struct bnxt *bp,
 291                struct bnxt_ulp_session_state *session)
 292 {
 293         struct bnxt_ulp_context *ulp_ctx;
 294
 295         if (!bp || !session) {
 296                 BNXT_TF_DBG(ERR, "Invalid Arguments\n");
 297                 return -EINVAL;
 298         }
 299         ulp_ctx = &bp->ulp_ctx;
 300
 301         if (!ulp_ctx->cfg_data)
 302                 return 0;
 303
 304         /* TBD call TF_session_detach */
 305
 306         /* Increment the ulp context data reference count usage. */
 307         if (ulp_ctx->cfg_data->ref_cnt >= 1) {
 308                 ulp_ctx->cfg_data->ref_cnt--;
 309                 if (ulp_ctx_deinit_allowed(bp))
 310                         ulp_ctx_deinit(bp, session);
 311                 ulp_ctx->cfg_data = NULL;
 312                 ulp_ctx->g_tfp = NULL;
 313                 return 0;
 314         }
 315         BNXT_TF_DBG(ERR, "context deatach on invalid data\n");
 316         return 0;
 317 }
 318
 319 /*
 320  * Initialize the state of an ULP session.
 321  * If the state of an ULP session is not initialized, set it's state to
 322  * initialized. If the state is already initialized, do nothing.
 323  */
 324 static void
 325 ulp_context_initialized(struct bnxt_ulp_session_state *session, bool *init)
 326 {
 327         pthread_mutex_lock(&session->bnxt_ulp_mutex);
 328
 329         if (!session->bnxt_ulp_init) {
 330                 session->bnxt_ulp_init = true;
 331                 *init = false;
 332         } else {
 333                 *init = true;
 334         }
 335
 336         pthread_mutex_unlock(&session->bnxt_ulp_mutex);
 337 }
 338
 339 /*
 340  * Check if an ULP session is already allocated for a specific PCI
 341  * domain & bus. If it is already allocated simply return the session
 342  * pointer, otherwise allocate a new session.
 343  */
 344 static struct bnxt_ulp_session_state *
 345 ulp_get_session(struct rte_pci_addr *pci_addr)
 346 {
 347         struct bnxt_ulp_session_state *session;
 348
 349         STAILQ_FOREACH(session, &bnxt_ulp_session_list, next) {
 350                 if (session->pci_info.domain == pci_addr->domain &&
 351                     session->pci_info.bus == pci_addr->bus) {
 352                         return session;
 353                 }
 354         }
 355         return NULL;
 356 }
 357
 358 /*
 359  * Allocate and Initialize an ULP session and set it's state to INITIALIZED.
 360  * If it's already initialized simply return the already existing session.
 361  */
 362 static struct bnxt_ulp_session_state *
 363 ulp_session_init(struct bnxt *bp,
 364                  bool *init)
 365 {
 366         struct rte_pci_device           *pci_dev;
 367         struct rte_pci_addr             *pci_addr;
 368         struct bnxt_ulp_session_state   *session;
 369
 370         if (!bp)
 371                 return NULL;
 372
 373         pci_dev = RTE_DEV_TO_PCI(bp->eth_dev->device);
 374         pci_addr = &pci_dev->addr;
 375
 376         pthread_mutex_lock(&bnxt_ulp_global_mutex);
 377
 378         session = ulp_get_session(pci_addr);
 379         if (!session) {
 380                 /* Not Found the session  Allocate a new one */
 381                 session = rte_zmalloc("bnxt_ulp_session",
 382                                       sizeof(struct bnxt_ulp_session_state),
 383                                       0);
 384                 if (!session) {
 385                         BNXT_TF_DBG(ERR,
 386                                     "Allocation failed for bnxt_ulp_session\n");
 387                         pthread_mutex_unlock(&bnxt_ulp_global_mutex);
 388                         return NULL;
 389
 390                 } else {
 391                         /* Add it to the queue */
 392                         session->pci_info.domain = pci_addr->domain;
 393                         session->pci_info.bus = pci_addr->bus;
 394                         pthread_mutex_init(&session->bnxt_ulp_mutex, NULL);
 395                         STAILQ_INSERT_TAIL(&bnxt_ulp_session_list,
 396                                            session, next);
 397                 }
 398         }
 399         ulp_context_initialized(session, init);
 400         pthread_mutex_unlock(&bnxt_ulp_global_mutex);
 401         return session;
 402 }
 403
 404 /*
 405  * When a device is closed, remove it's associated session from the global
 406  * session list.
 407  */
 408 static void
 409 ulp_session_deinit(struct bnxt_ulp_session_state *session)
 410 {
 411         if (!session)
 412                 return;
 413
 414         if (!session->cfg_data) {
 415                 pthread_mutex_lock(&bnxt_ulp_global_mutex);
 416                 STAILQ_REMOVE(&bnxt_ulp_session_list, session,
 417                               bnxt_ulp_session_state, next);
 418                 pthread_mutex_destroy(&session->bnxt_ulp_mutex);
 419                 rte_free(session);
 420                 pthread_mutex_unlock(&bnxt_ulp_global_mutex);
 421         }
 422 }
 423
 424 /*
 425  * When a port is initialized by dpdk. This functions is called
 426  * and this function initializes the ULP context and rest of the
 427  * infrastructure associated with it.
 428  */
 429 int32_t
 430 bnxt_ulp_init(struct bnxt *bp)
 431 {
 432         struct bnxt_ulp_session_state *session;
 433         bool init;
 434         int rc;
 435
 436         /*
 437          * Multiple uplink ports can be associated with a single vswitch.
 438          * Make sure only the port that is started first will initialize
 439          * the TF session.
 440          */
 441         session = ulp_session_init(bp, &init);
 442         if (!session) {
 443                 BNXT_TF_DBG(ERR, "Failed to initialize the tf session\n");
 444                 return -EINVAL;
 445         }
 446
 447         /*
 448          * If ULP is already initialized for a specific domain then simply
 449          * assign the ulp context to this rte_eth_dev.
 450          */
 451         if (init) {
 452                 rc = ulp_ctx_attach(&bp->ulp_ctx, session);
 453                 if (rc) {
 454                         BNXT_TF_DBG(ERR,
 455                                     "Failed to attach the ulp context\n");
 456                 }
 457                 return rc;
 458         }
 459
 460         /* Allocate and Initialize the ulp context. */
 461         rc = ulp_ctx_init(bp, session);
 462         if (rc) {
 463                 BNXT_TF_DBG(ERR, "Failed to create the ulp context\n");
 464                 goto jump_to_error;
 465         }
 466
 467         /* Create the Mark database. */
 468         rc = ulp_mark_db_init(&bp->ulp_ctx);
 469         if (rc) {
 470                 BNXT_TF_DBG(ERR, "Failed to create the mark database\n");
 471                 goto jump_to_error;
 472         }
 473
 474         /* Create the flow database. */
 475         rc = ulp_flow_db_init(&bp->ulp_ctx);
 476         if (rc) {
 477                 BNXT_TF_DBG(ERR, "Failed to create the flow database\n");
 478                 goto jump_to_error;
 479         }
 480
 481         /* Create the eem table scope. */
 482         rc = ulp_eem_tbl_scope_init(bp);
 483         if (rc) {
 484                 BNXT_TF_DBG(ERR, "Failed to create the eem scope table\n");
 485                 goto jump_to_error;
 486         }
 487
 488         return rc;
 489
 490 jump_to_error:
 491         bnxt_ulp_deinit(bp);
 492         return -ENOMEM;
 493 }
 494
 495 /* Below are the access functions to access internal data of ulp context. */
 496
 497 /*
 498  * When a port is deinit'ed by dpdk. This function is called
 499  * and this function clears the ULP context and rest of the
 500  * infrastructure associated with it.
 501  */
 502 void
 503 bnxt_ulp_deinit(struct bnxt *bp)
 504 {
 505         struct bnxt_ulp_session_state   *session;
 506         struct rte_pci_device           *pci_dev;
 507         struct rte_pci_addr             *pci_addr;
 508
 509         /* Get the session first */
 510         pci_dev = RTE_DEV_TO_PCI(bp->eth_dev->device);
 511         pci_addr = &pci_dev->addr;
 512         pthread_mutex_lock(&bnxt_ulp_global_mutex);
 513         session = ulp_get_session(pci_addr);
 514         pthread_mutex_unlock(&bnxt_ulp_global_mutex);
 515
 516         /* session not found then just exit */
 517         if (!session)
 518                 return;
 519
 520         /* clean up regular flows */
 521         ulp_flow_db_flush_flows(&bp->ulp_ctx, BNXT_ULP_REGULAR_FLOW_TABLE);
 522
 523         /* cleanup the eem table scope */
 524         ulp_eem_tbl_scope_deinit(bp, &bp->ulp_ctx);
 525
 526         /* cleanup the flow database */
 527         ulp_flow_db_deinit(&bp->ulp_ctx);
 528
 529         /* Delete the Mark database */
 530         ulp_mark_db_deinit(&bp->ulp_ctx);
 531
 532         /* Delete the ulp context and tf session */
 533         ulp_ctx_detach(bp, session);
 534
 535         /* Finally delete the bnxt session*/
 536         ulp_session_deinit(session);
 537 }
 538
 539 /* Function to set the Mark DB into the context */
 540 int32_t
 541 bnxt_ulp_cntxt_ptr2_mark_db_set(struct bnxt_ulp_context *ulp_ctx,
 542                                 struct bnxt_ulp_mark_tbl *mark_tbl)
 543 {
 544         if (!ulp_ctx || !ulp_ctx->cfg_data) {
 545                 BNXT_TF_DBG(ERR, "Invalid ulp context data\n");
 546                 return -EINVAL;
 547         }
 548
 549         ulp_ctx->cfg_data->mark_tbl = mark_tbl;
 550
 551         return 0;
 552 }
 553
 554 /* Function to retrieve the Mark DB from the context. */
 555 struct bnxt_ulp_mark_tbl *
 556 bnxt_ulp_cntxt_ptr2_mark_db_get(struct bnxt_ulp_context *ulp_ctx)
 557 {
 558         if (!ulp_ctx || !ulp_ctx->cfg_data)
 559                 return NULL;
 560
 561         return ulp_ctx->cfg_data->mark_tbl;
 562 }
 563
 564 /* Function to set the device id of the hardware. */
 565 int32_t
 566 bnxt_ulp_cntxt_dev_id_set(struct bnxt_ulp_context *ulp_ctx,
 567                           uint32_t dev_id)
 568 {
 569         if (ulp_ctx && ulp_ctx->cfg_data) {
 570                 ulp_ctx->cfg_data->dev_id = dev_id;
 571                 return 0;
 572         }
 573
 574         return -EINVAL;
 575 }
 576
 577 /* Function to get the device id of the hardware. */
 578 int32_t
 579 bnxt_ulp_cntxt_dev_id_get(struct bnxt_ulp_context *ulp_ctx,
 580                           uint32_t *dev_id)
 581 {
 582         if (ulp_ctx && ulp_ctx->cfg_data) {
 583                 *dev_id = ulp_ctx->cfg_data->dev_id;
 584                 return 0;
 585         }
 586
 587         return -EINVAL;
 588 }
 589
 590 /* Function to get the table scope id of the EEM table. */
 591 int32_t
 592 bnxt_ulp_cntxt_tbl_scope_id_get(struct bnxt_ulp_context *ulp_ctx,
 593                                 uint32_t *tbl_scope_id)
 594 {
 595         if (ulp_ctx && ulp_ctx->cfg_data) {
 596                 *tbl_scope_id = ulp_ctx->cfg_data->tbl_scope_id;
 597                 return 0;
 598         }
 599
 600         return -EINVAL;
 601 }
 602
 603 /* Function to set the table scope id of the EEM table. */
 604 int32_t
 605 bnxt_ulp_cntxt_tbl_scope_id_set(struct bnxt_ulp_context *ulp_ctx,
 606                                 uint32_t tbl_scope_id)
 607 {
 608         if (ulp_ctx && ulp_ctx->cfg_data) {
 609                 ulp_ctx->cfg_data->tbl_scope_id = tbl_scope_id;
 610                 return 0;
 611         }
 612
 613         return -EINVAL;
 614 }
 615
 616 /* Function to set the tfp session details from the ulp context. */
 617 int32_t
 618 bnxt_ulp_cntxt_tfp_set(struct bnxt_ulp_context *ulp, struct tf *tfp)
 619 {
 620         if (!ulp) {
 621                 BNXT_TF_DBG(ERR, "Invalid arguments\n");
 622                 return -EINVAL;
 623         }
 624
 625         /* TBD The tfp should be removed once tf_attach is implemented. */
 626         ulp->g_tfp = tfp;
 627         return 0;
 628 }
 629
 630 /* Function to get the tfp session details from the ulp context. */
 631 struct tf *
 632 bnxt_ulp_cntxt_tfp_get(struct bnxt_ulp_context *ulp)
 633 {
 634         if (!ulp) {
 635                 BNXT_TF_DBG(ERR, "Invalid arguments\n");
 636                 return NULL;
 637         }
 638         /* TBD The tfp should be removed once tf_attach is implemented. */
 639         return ulp->g_tfp;
 640 }
 641
 642 /*
 643  * Get the device table entry based on the device id.
 644  *
 645  * dev_id [in] The device id of the hardware
 646  *
 647  * Returns the pointer to the device parameters.
 648  */
 649 struct bnxt_ulp_device_params *
 650 bnxt_ulp_device_params_get(uint32_t dev_id)
 651 {
 652         if (dev_id < BNXT_ULP_MAX_NUM_DEVICES)
 653                 return &ulp_device_params[dev_id];
 654         return NULL;
 655 }
 656
 657 /* Function to set the flow database to the ulp context. */
 658 int32_t
 659 bnxt_ulp_cntxt_ptr2_flow_db_set(struct bnxt_ulp_context *ulp_ctx,
 660                                 struct bnxt_ulp_flow_db *flow_db)
 661 {
 662         if (!ulp_ctx || !ulp_ctx->cfg_data)
 663                 return -EINVAL;
 664
 665         ulp_ctx->cfg_data->flow_db = flow_db;
 666         return 0;
 667 }
 668
 669 /* Function to get the flow database from the ulp context. */
 670 struct bnxt_ulp_flow_db *
 671 bnxt_ulp_cntxt_ptr2_flow_db_get(struct bnxt_ulp_context *ulp_ctx)
 672 {
 673         if (!ulp_ctx || !ulp_ctx->cfg_data)
 674                 return NULL;
 675
 676         return ulp_ctx->cfg_data->flow_db;
 677 }
 678
 679 /* Function to get the ulp context from eth device. */
 680 struct bnxt_ulp_context *
 681 bnxt_ulp_eth_dev_ptr2_cntxt_get(struct rte_eth_dev      *dev)
 682 {
 683         struct bnxt     *bp;
 684
 685         bp = (struct bnxt *)dev->data->dev_private;
 686         if (!bp) {
 687                 BNXT_TF_DBG(ERR, "Bnxt private data is not initialized\n");
 688                 return NULL;
 689         }
 690         return &bp->ulp_ctx;
 691 }