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 = tf_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         session->ref_count++;
 104
 105         return 0;
 106
 107  cleanup:
 108         tfp_free(tfp->session->core_data);
 109         tfp_free(tfp->session);
 110         tfp->session = NULL;
 111         return rc;
 112 }
 113
 114 int
 115 tf_session_attach_session(struct tf *tfp __rte_unused,
 116                           struct tf_session_attach_session_parms *parms __rte_unused)
 117 {
 118         int rc = -EOPNOTSUPP;
 119
 120         TF_CHECK_PARMS2(tfp, parms);
 121
 122         TFP_DRV_LOG(ERR,
 123                     "Attach not yet supported, rc:%s\n",
 124                     strerror(-rc));
 125         return rc;
 126 }
 127
 128 int
 129 tf_session_close_session(struct tf *tfp,
 130                          struct tf_session_close_session_parms *parms)
 131 {
 132         int rc;
 133         struct tf_session *tfs = NULL;
 134         struct tf_dev_info *tfd = NULL;
 135
 136         TF_CHECK_PARMS2(tfp, parms);
 137
 138         rc = tf_session_get_session(tfp, &tfs);
 139         if (rc) {
 140                 TFP_DRV_LOG(ERR,
 141                             "Session lookup failed, rc:%s\n",
 142                             strerror(-rc));
 143                 return rc;
 144         }
 145
 146         if (tfs->session_id.id == TF_SESSION_ID_INVALID) {
 147                 rc = -EINVAL;
 148                 TFP_DRV_LOG(ERR,
 149                             "Invalid session id, unable to close, rc:%s\n",
 150                             strerror(-rc));
 151                 return rc;
 152         }
 153
 154         tfs->ref_count--;
 155
 156         /* Record the session we're closing so the caller knows the
 157          * details.
 158          */
 159         *parms->session_id = tfs->session_id;
 160
 161         rc = tf_session_get_device(tfs, &tfd);
 162         if (rc) {
 163                 TFP_DRV_LOG(ERR,
 164                             "Device lookup failed, rc:%s\n",
 165                             strerror(-rc));
 166                 return rc;
 167         }
 168
 169         if (tfs->ref_count > 0) {
 170                 /* In case we're attached only the session client gets
 171                  * closed.
 172                  */
 173                 rc = tf_msg_session_close(tfp);
 174                 if (rc) {
 175                         /* Log error */
 176                         TFP_DRV_LOG(ERR,
 177                                     "FW Session close failed, rc:%s\n",
 178                                     strerror(-rc));
 179                 }
 180
 181                 return 0;
 182         }
 183
 184         /* Final cleanup as we're last user of the session */
 185
 186         /* Unbind the device */
 187         rc = tf_dev_unbind(tfp, tfd);
 188         if (rc) {
 189                 /* Log error */
 190                 TFP_DRV_LOG(ERR,
 191                             "Device unbind failed, rc:%s\n",
 192                             strerror(-rc));
 193         }
 194
 195         /* In case we're attached only the session client gets closed */
 196         rc = tf_msg_session_close(tfp);
 197         if (rc) {
 198                 /* Log error */
 199                 TFP_DRV_LOG(ERR,
 200                             "FW Session close failed, rc:%s\n",
 201                             strerror(-rc));
 202         }
 203
 204         tfp_free(tfp->session->core_data);
 205         tfp_free(tfp->session);
 206         tfp->session = NULL;
 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         *tfd = &tfs->dev;
 235
 236         return 0;
 237 }
 238
 239 int
 240 tf_session_get_fw_session_id(struct tf *tfp,
 241                              uint8_t *fw_session_id)
 242 {
 243         int rc;
 244         struct tf_session *tfs = NULL;
 245
 246         if (tfp->session == NULL) {
 247                 rc = -EINVAL;
 248                 TFP_DRV_LOG(ERR,
 249                             "Session not created, rc:%s\n",
 250                             strerror(-rc));
 251                 return rc;
 252         }
 253
 254         rc = tf_session_get_session(tfp, &tfs);
 255         if (rc)
 256                 return rc;
 257
 258         *fw_session_id = tfs->session_id.internal.fw_session_id;
 259
 260         return 0;
 261 }