drivers/net/bnxt/tf_core/tf_session.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
   8 #include <rte_common.h>
   9
  10 #include "tf_session.h"
  11 #include "tf_common.h"
  12 #include "tf_msg.h"
  13 #include "tfp.h"
  14
  15 int
  16 tf_session_open_session(struct tf *tfp,
  17                         struct tf_session_open_session_parms *parms)
  18 {
  19         int rc;
  20         struct tf_session *session = NULL;
  21         struct tfp_calloc_parms cparms;
  22         uint8_t fw_session_id;
  23         union tf_session_id *session_id;
  24
  25         TF_CHECK_PARMS2(tfp, parms);
  26
  27         /* Open FW session and get a new session_id */
  28         rc = tf_msg_session_open(tfp,
  29                                  parms->open_cfg->ctrl_chan_name,
  30                                  &fw_session_id);
  31         if (rc) {
  32                 /* Log error */
  33                 if (rc == -EEXIST)
  34                         TFP_DRV_LOG(ERR,
  35                                     "Session is already open, rc:%s\n",
  36                                     strerror(-rc));
  37                 else
  38                         TFP_DRV_LOG(ERR,
  39                                     "Open message send failed, rc:%s\n",
  40                                     strerror(-rc));
  41
  42                 parms->open_cfg->session_id.id = TF_FW_SESSION_ID_INVALID;
  43                 return rc;
  44         }
  45
  46         /* Allocate session */
  47         cparms.nitems = 1;
  48         cparms.size = sizeof(struct tf_session_info);
  49         cparms.alignment = 0;
  50         rc = tfp_calloc(&cparms);
  51         if (rc) {
  52                 /* Log error */
  53                 TFP_DRV_LOG(ERR,
  54                             "Failed to allocate session info, rc:%s\n",
  55                             strerror(-rc));
  56                 goto cleanup;
  57         }
  58         tfp->session = (struct tf_session_info *)cparms.mem_va;
  59
  60         /* Allocate core data for the session */
  61         cparms.nitems = 1;
  62         cparms.size = sizeof(struct tf_session);
  63         cparms.alignment = 0;
  64         rc = tfp_calloc(&cparms);
  65         if (rc) {
  66                 /* Log error */
  67                 TFP_DRV_LOG(ERR,
  68                             "Failed to allocate session data, rc:%s\n",
  69                             strerror(-rc));
  70                 goto cleanup;
  71         }
  72         tfp->session->core_data = cparms.mem_va;
  73
  74         /* Initialize Session and Device */
  75         session = (struct tf_session *)tfp->session->core_data;
  76         session->ver.major = 0;
  77         session->ver.minor = 0;
  78         session->ver.update = 0;
  79
  80         session_id = &parms->open_cfg->session_id;
  81         session->session_id.internal.domain = session_id->internal.domain;
  82         session->session_id.internal.bus = session_id->internal.bus;
  83         session->session_id.internal.device = session_id->internal.device;
  84         session->session_id.internal.fw_session_id = fw_session_id;
  85         /* Return the allocated fw session id */
  86         session_id->internal.fw_session_id = fw_session_id;
  87
  88         session->shadow_copy = parms->open_cfg->shadow_copy;
  89
  90         tfp_memcpy(session->ctrl_chan_name,
  91                    parms->open_cfg->ctrl_chan_name,
  92                    TF_SESSION_NAME_MAX);
  93
  94         rc = dev_bind(tfp,
  95                       parms->open_cfg->device_type,
  96                       session->shadow_copy,
  97                       &parms->open_cfg->resources,
  98                       session->dev);
  99         /* Logging handled by dev_bind */
 100         if (rc)
 101                 return rc;
 102
 103         /* Query for Session Config
 104          */
 105         rc = tf_msg_session_qcfg(tfp);
 106         if (rc) {
 107                 TFP_DRV_LOG(ERR,
 108                             "Query config message send failed, rc:%s\n",
 109                             strerror(-rc));
 110                 goto cleanup_close;
 111         }
 112
 113         session->ref_count++;
 114
 115         return 0;
 116
 117  cleanup:
 118         tfp_free(tfp->session->core_data);
 119         tfp_free(tfp->session);
 120         tfp->session = NULL;
 121         return rc;
 122
 123  cleanup_close:
 124         tf_close_session(tfp);
 125         return -EINVAL;
 126 }
 127
 128 int
 129 tf_session_attach_session(struct tf *tfp __rte_unused,
 130                           struct tf_session_attach_session_parms *parms __rte_unused)
 131 {
 132         int rc = -EOPNOTSUPP;
 133
 134         TF_CHECK_PARMS2(tfp, parms);
 135
 136         TFP_DRV_LOG(ERR,
 137                     "Attach not yet supported, rc:%s\n",
 138                     strerror(-rc));
 139         return rc;
 140 }
 141
 142 int
 143 tf_session_close_session(struct tf *tfp,
 144                          struct tf_session_close_session_parms *parms)
 145 {
 146         int rc;
 147         struct tf_session *tfs = NULL;
 148         struct tf_dev_info *tfd = NULL;
 149
 150         TF_CHECK_PARMS2(tfp, parms);
 151
 152         rc = tf_session_get_session(tfp, &tfs);
 153         if (rc) {
 154                 TFP_DRV_LOG(ERR,
 155                             "Session lookup failed, rc:%s\n",
 156                             strerror(-rc));
 157                 return rc;
 158         }
 159
 160         if (tfs->session_id.id == TF_SESSION_ID_INVALID) {
 161                 rc = -EINVAL;
 162                 TFP_DRV_LOG(ERR,
 163                             "Invalid session id, unable to close, rc:%s\n",
 164                             strerror(-rc));
 165                 return rc;
 166         }
 167
 168         /* Record the session we're closing so the caller knows the
 169          * details.
 170          */
 171         *parms->session_id = tfs->session_id;
 172
 173         rc = tf_session_get_device(tfs, &tfd);
 174         if (rc) {
 175                 TFP_DRV_LOG(ERR,
 176                             "Device lookup failed, rc:%s\n",
 177                             strerror(-rc));
 178                 return rc;
 179         }
 180
 181         /* In case we're attached only the session client gets closed */
 182         rc = tf_msg_session_close(tfp);
 183         if (rc) {
 184                 /* Log error */
 185                 TFP_DRV_LOG(ERR,
 186                             "FW Session close failed, rc:%s\n",
 187                             strerror(-rc));
 188         }
 189
 190         tfs->ref_count--;
 191
 192         /* Final cleanup as we're last user of the session */
 193         if (tfs->ref_count == 0) {
 194                 /* Unbind the device */
 195                 rc = dev_unbind(tfp, tfd);
 196                 if (rc) {
 197                         /* Log error */
 198                         TFP_DRV_LOG(ERR,
 199                                     "Device unbind failed, rc:%s\n",
 200                                     strerror(-rc));
 201                 }
 202
 203                 tfp_free(tfp->session->core_data);
 204                 tfp_free(tfp->session);
 205                 tfp->session = NULL;
 206         }
 207
 208         return 0;
 209 }
 210
 211 int
 212 tf_session_get_session(struct tf *tfp,
 213                        struct tf_session **tfs)
 214 {
 215         int rc;
 216
 217         if (tfp->session == NULL || tfp->session->core_data == NULL) {
 218                 rc = -EINVAL;
 219                 TFP_DRV_LOG(ERR,
 220                             "Session not created, rc:%s\n",
 221                             strerror(-rc));
 222                 return rc;
 223         }
 224
 225         *tfs = (struct tf_session *)(tfp->session->core_data);
 226
 227         return 0;
 228 }
 229
 230 int
 231 tf_session_get_device(struct tf_session *tfs,
 232                       struct tf_dev_info **tfd)
 233 {
 234         int rc;
 235
 236         if (tfs->dev == NULL) {
 237                 rc = -EINVAL;
 238                 TFP_DRV_LOG(ERR,
 239                             "Device not created, rc:%s\n",
 240                             strerror(-rc));
 241                 return rc;
 242         }
 243
 244         *tfd = tfs->dev;
 245
 246         return 0;
 247 }
 248
 249 int
 250 tf_session_get_fw_session_id(struct tf *tfp,
 251                              uint8_t *fw_session_id)
 252 {
 253         int rc;
 254         struct tf_session *tfs = NULL;
 255
 256         if (tfp->session == NULL) {
 257                 rc = -EINVAL;
 258                 TFP_DRV_LOG(ERR,
 259                             "Session not created, rc:%s\n",
 260                             strerror(-rc));
 261                 return rc;
 262         }
 263
 264         rc = tf_session_get_session(tfp, &tfs);
 265         if (rc)
 266                 return rc;
 267
 268         *fw_session_id = tfs->session_id.internal.fw_session_id;
 269
 270         return 0;
 271 }