drivers/net/bnxt/tf_core/tf_tcam.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019-2020 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <string.h>
   7 #include <rte_common.h>
   8
   9 #include "tf_tcam.h"
  10 #include "tf_common.h"
  11 #include "tf_util.h"
  12 #include "tf_rm.h"
  13 #include "tf_device.h"
  14 #include "tfp.h"
  15 #include "tf_session.h"
  16 #include "tf_msg.h"
  17
  18 struct tf;
  19
  20 /**
  21  * TCAM DBs.
  22  */
  23 static void *tcam_db[TF_DIR_MAX];
  24
  25 /**
  26  * TCAM Shadow DBs
  27  */
  28 /* static void *shadow_tcam_db[TF_DIR_MAX]; */
  29
  30 /**
  31  * Init flag, set on bind and cleared on unbind
  32  */
  33 static uint8_t init;
  34
  35 /**
  36  * Shadow init flag, set on bind and cleared on unbind
  37  */
  38 /* static uint8_t shadow_init; */
  39
  40 int
  41 tf_tcam_bind(struct tf *tfp,
  42              struct tf_tcam_cfg_parms *parms)
  43 {
  44         int rc;
  45         int i;
  46         struct tf_tcam_resources *tcam_cnt;
  47         struct tf_rm_create_db_parms db_cfg = { 0 };
  48
  49         TF_CHECK_PARMS2(tfp, parms);
  50
  51         if (init) {
  52                 TFP_DRV_LOG(ERR,
  53                             "TCAM DB already initialized\n");
  54                 return -EINVAL;
  55         }
  56
  57         tcam_cnt = parms->resources->tcam_cnt;
  58         if ((tcam_cnt[TF_DIR_RX].cnt[TF_TCAM_TBL_TYPE_WC_TCAM] % 2) ||
  59             (tcam_cnt[TF_DIR_TX].cnt[TF_TCAM_TBL_TYPE_WC_TCAM] % 2)) {
  60                 TFP_DRV_LOG(ERR,
  61                             "Number of WC TCAM entries cannot be odd num\n");
  62                 return -EINVAL;
  63         }
  64
  65         db_cfg.type = TF_DEVICE_MODULE_TYPE_TCAM;
  66         db_cfg.num_elements = parms->num_elements;
  67         db_cfg.cfg = parms->cfg;
  68
  69         for (i = 0; i < TF_DIR_MAX; i++) {
  70                 db_cfg.dir = i;
  71                 db_cfg.alloc_cnt = parms->resources->tcam_cnt[i].cnt;
  72                 db_cfg.rm_db = &tcam_db[i];
  73                 rc = tf_rm_create_db(tfp, &db_cfg);
  74                 if (rc) {
  75                         TFP_DRV_LOG(ERR,
  76                                     "%s: TCAM DB creation failed\n",
  77                                     tf_dir_2_str(i));
  78                         return rc;
  79                 }
  80         }
  81
  82         init = 1;
  83
  84         printf("TCAM - initialized\n");
  85
  86         return 0;
  87 }
  88
  89 int
  90 tf_tcam_unbind(struct tf *tfp)
  91 {
  92         int rc;
  93         int i;
  94         struct tf_rm_free_db_parms fparms = { 0 };
  95
  96         TF_CHECK_PARMS1(tfp);
  97
  98         /* Bail if nothing has been initialized */
  99         if (!init) {
 100                 TFP_DRV_LOG(INFO,
 101                             "No TCAM DBs created\n");
 102                 return 0;
 103         }
 104
 105         for (i = 0; i < TF_DIR_MAX; i++) {
 106                 fparms.dir = i;
 107                 fparms.rm_db = tcam_db[i];
 108                 rc = tf_rm_free_db(tfp, &fparms);
 109                 if (rc)
 110                         return rc;
 111
 112                 tcam_db[i] = NULL;
 113         }
 114
 115         init = 0;
 116
 117         return 0;
 118 }
 119
 120 int
 121 tf_tcam_alloc(struct tf *tfp,
 122               struct tf_tcam_alloc_parms *parms)
 123 {
 124         int rc;
 125         struct tf_session *tfs;
 126         struct tf_dev_info *dev;
 127         struct tf_rm_allocate_parms aparms = { 0 };
 128         uint16_t num_slice_per_row = 1;
 129
 130         TF_CHECK_PARMS2(tfp, parms);
 131
 132         if (!init) {
 133                 TFP_DRV_LOG(ERR,
 134                             "%s: No TCAM DBs created\n",
 135                             tf_dir_2_str(parms->dir));
 136                 return -EINVAL;
 137         }
 138
 139         /* Retrieve the session information */
 140         rc = tf_session_get_session(tfp, &tfs);
 141         if (rc)
 142                 return rc;
 143
 144         /* Retrieve the device information */
 145         rc = tf_session_get_device(tfs, &dev);
 146         if (rc)
 147                 return rc;
 148
 149         if (dev->ops->tf_dev_get_tcam_slice_info == NULL) {
 150                 rc = -EOPNOTSUPP;
 151                 TFP_DRV_LOG(ERR,
 152                             "%s: Operation not supported, rc:%s\n",
 153                             tf_dir_2_str(parms->dir),
 154                             strerror(-rc));
 155                 return rc;
 156         }
 157
 158         /* Need to retrieve row size etc */
 159         rc = dev->ops->tf_dev_get_tcam_slice_info(tfp,
 160                                                   parms->type,
 161                                                   parms->key_size,
 162                                                   &num_slice_per_row);
 163         if (rc)
 164                 return rc;
 165
 166         /* Allocate requested element */
 167         aparms.rm_db = tcam_db[parms->dir];
 168         aparms.db_index = parms->type;
 169         aparms.priority = parms->priority;
 170         aparms.index = (uint32_t *)&parms->idx;
 171         rc = tf_rm_allocate(&aparms);
 172         if (rc) {
 173                 TFP_DRV_LOG(ERR,
 174                             "%s: Failed tcam, type:%d\n",
 175                             tf_dir_2_str(parms->dir),
 176                             parms->type);
 177                 return rc;
 178         }
 179
 180         if (parms->type == TF_TCAM_TBL_TYPE_WC_TCAM &&
 181             (parms->idx % 2) != 0) {
 182                 rc = tf_rm_allocate(&aparms);
 183                 if (rc) {
 184                         TFP_DRV_LOG(ERR,
 185                                     "%s: Failed tcam, type:%d\n",
 186                                     tf_dir_2_str(parms->dir),
 187                                     parms->type);
 188                         return rc;
 189                 }
 190         }
 191
 192         parms->idx *= num_slice_per_row;
 193
 194         return 0;
 195 }
 196
 197 int
 198 tf_tcam_free(struct tf *tfp,
 199              struct tf_tcam_free_parms *parms)
 200 {
 201         int rc;
 202         struct tf_session *tfs;
 203         struct tf_dev_info *dev;
 204         struct tf_rm_is_allocated_parms aparms = { 0 };
 205         struct tf_rm_free_parms fparms = { 0 };
 206         struct tf_rm_get_hcapi_parms hparms = { 0 };
 207         uint16_t num_slice_per_row = 1;
 208         int allocated = 0;
 209
 210         TF_CHECK_PARMS2(tfp, parms);
 211
 212         if (!init) {
 213                 TFP_DRV_LOG(ERR,
 214                             "%s: No TCAM DBs created\n",
 215                             tf_dir_2_str(parms->dir));
 216                 return -EINVAL;
 217         }
 218
 219         /* Retrieve the session information */
 220         rc = tf_session_get_session(tfp, &tfs);
 221         if (rc)
 222                 return rc;
 223
 224         /* Retrieve the device information */
 225         rc = tf_session_get_device(tfs, &dev);
 226         if (rc)
 227                 return rc;
 228
 229         if (dev->ops->tf_dev_get_tcam_slice_info == NULL) {
 230                 rc = -EOPNOTSUPP;
 231                 TFP_DRV_LOG(ERR,
 232                             "%s: Operation not supported, rc:%s\n",
 233                             tf_dir_2_str(parms->dir),
 234                             strerror(-rc));
 235                 return rc;
 236         }
 237
 238         /* Need to retrieve row size etc */
 239         rc = dev->ops->tf_dev_get_tcam_slice_info(tfp,
 240                                                   parms->type,
 241                                                   0,
 242                                                   &num_slice_per_row);
 243         if (rc)
 244                 return rc;
 245
 246         /* Check if element is in use */
 247         aparms.rm_db = tcam_db[parms->dir];
 248         aparms.db_index = parms->type;
 249         aparms.index = parms->idx / num_slice_per_row;
 250         aparms.allocated = &allocated;
 251         rc = tf_rm_is_allocated(&aparms);
 252         if (rc)
 253                 return rc;
 254
 255         if (!allocated) {
 256                 TFP_DRV_LOG(ERR,
 257                             "%s: Entry already free, type:%d, index:%d\n",
 258                             tf_dir_2_str(parms->dir),
 259                             parms->type,
 260                             parms->idx);
 261                 return rc;
 262         }
 263
 264         /* Free requested element */
 265         fparms.rm_db = tcam_db[parms->dir];
 266         fparms.db_index = parms->type;
 267         fparms.index = parms->idx / num_slice_per_row;
 268         rc = tf_rm_free(&fparms);
 269         if (rc) {
 270                 TFP_DRV_LOG(ERR,
 271                             "%s: Free failed, type:%d, index:%d\n",
 272                             tf_dir_2_str(parms->dir),
 273                             parms->type,
 274                             parms->idx);
 275                 return rc;
 276         }
 277
 278         /* Convert TF type to HCAPI RM type */
 279         hparms.rm_db = tcam_db[parms->dir];
 280         hparms.db_index = parms->type;
 281         hparms.hcapi_type = &parms->hcapi_type;
 282
 283         rc = tf_rm_get_hcapi_type(&hparms);
 284         if (rc)
 285                 return rc;
 286
 287         rc = tf_msg_tcam_entry_free(tfp, parms);
 288         if (rc) {
 289                 /* Log error */
 290                 TFP_DRV_LOG(ERR, "%s: %s: Entry %d free failed with err %s",
 291                             tf_dir_2_str(parms->dir),
 292                             tf_tcam_tbl_2_str(parms->type),
 293                             parms->idx,
 294                             strerror(-rc));
 295         }
 296
 297         return 0;
 298 }
 299
 300 int
 301 tf_tcam_alloc_search(struct tf *tfp __rte_unused,
 302                      struct tf_tcam_alloc_search_parms *parms __rte_unused)
 303 {
 304         return 0;
 305 }
 306
 307 int
 308 tf_tcam_set(struct tf *tfp __rte_unused,
 309             struct tf_tcam_set_parms *parms __rte_unused)
 310 {
 311         int rc;
 312         struct tf_session *tfs;
 313         struct tf_dev_info *dev;
 314         struct tf_rm_is_allocated_parms aparms = { 0 };
 315         struct tf_rm_get_hcapi_parms hparms = { 0 };
 316         uint16_t num_slice_per_row = 1;
 317         int allocated = 0;
 318
 319         TF_CHECK_PARMS2(tfp, parms);
 320
 321         if (!init) {
 322                 TFP_DRV_LOG(ERR,
 323                             "%s: No TCAM DBs created\n",
 324                             tf_dir_2_str(parms->dir));
 325                 return -EINVAL;
 326         }
 327
 328         /* Retrieve the session information */
 329         rc = tf_session_get_session(tfp, &tfs);
 330         if (rc)
 331                 return rc;
 332
 333         /* Retrieve the device information */
 334         rc = tf_session_get_device(tfs, &dev);
 335         if (rc)
 336                 return rc;
 337
 338         if (dev->ops->tf_dev_get_tcam_slice_info == NULL) {
 339                 rc = -EOPNOTSUPP;
 340                 TFP_DRV_LOG(ERR,
 341                             "%s: Operation not supported, rc:%s\n",
 342                             tf_dir_2_str(parms->dir),
 343                             strerror(-rc));
 344                 return rc;
 345         }
 346
 347         /* Need to retrieve row size etc */
 348         rc = dev->ops->tf_dev_get_tcam_slice_info(tfp,
 349                                                   parms->type,
 350                                                   parms->key_size,
 351                                                   &num_slice_per_row);
 352         if (rc)
 353                 return rc;
 354
 355         /* Check if element is in use */
 356         aparms.rm_db = tcam_db[parms->dir];
 357         aparms.db_index = parms->type;
 358         aparms.index = parms->idx / num_slice_per_row;
 359         aparms.allocated = &allocated;
 360         rc = tf_rm_is_allocated(&aparms);
 361         if (rc)
 362                 return rc;
 363
 364         if (!allocated) {
 365                 TFP_DRV_LOG(ERR,
 366                             "%s: Entry is not allocated, type:%d, index:%d\n",
 367                             tf_dir_2_str(parms->dir),
 368                             parms->type,
 369                             parms->idx);
 370                 return rc;
 371         }
 372
 373         /* Convert TF type to HCAPI RM type */
 374         hparms.rm_db = tcam_db[parms->dir];
 375         hparms.db_index = parms->type;
 376         hparms.hcapi_type = &parms->hcapi_type;
 377
 378         rc = tf_rm_get_hcapi_type(&hparms);
 379         if (rc)
 380                 return rc;
 381
 382         rc = tf_msg_tcam_entry_set(tfp, parms);
 383         if (rc) {
 384                 /* Log error */
 385                 TFP_DRV_LOG(ERR, "%s: %s: Entry %d free failed with err %s",
 386                             tf_dir_2_str(parms->dir),
 387                             tf_tcam_tbl_2_str(parms->type),
 388                             parms->idx,
 389                             strerror(-rc));
 390         }
 391
 392         return 0;
 393 }
 394
 395 int
 396 tf_tcam_get(struct tf *tfp __rte_unused,
 397             struct tf_tcam_get_parms *parms __rte_unused)
 398 {
 399         return 0;
 400 }