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         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         /* Record the session we're closing so the caller knows the
 155          * details.
 156          */
 157         *parms->session_id = tfs->session_id;
 158
 159         rc = tf_session_get_device(tfs, &tfd);
 160         if (rc) {
 161                 TFP_DRV_LOG(ERR,
 162                             "Device lookup failed, rc:%s\n",
 163                             strerror(-rc));
 164                 return rc;
 165         }
 166
 167         /* In case we're attached only the session client gets closed */
 168         rc = tf_msg_session_close(tfp);
 169         if (rc) {
 170                 /* Log error */
 171                 TFP_DRV_LOG(ERR,
 172                             "FW Session close failed, rc:%s\n",
 173                             strerror(-rc));
 174         }
 175
 176         tfs->ref_count--;
 177
 178         /* Final cleanup as we're last user of the session */
 179         if (tfs->ref_count == 0) {
 180                 /* Unbind the device */
 181                 rc = dev_unbind(tfp, tfd);
 182                 if (rc) {
 183                         /* Log error */
 184                         TFP_DRV_LOG(ERR,
 185                                     "Device unbind failed, rc:%s\n",
 186                                     strerror(-rc));
 187                 }
 188
 189                 tfp_free(tfp->session->core_data);
 190                 tfp_free(tfp->session);
 191                 tfp->session = NULL;
 192         }
 193
 194         return 0;
 195 }
 196
 197 int
 198 tf_session_get_session(struct tf *tfp,
 199                        struct tf_session **tfs)
 200 {
 201         int rc;
 202
 203         if (tfp->session == NULL || tfp->session->core_data == NULL) {
 204                 rc = -EINVAL;
 205                 TFP_DRV_LOG(ERR,
 206                             "Session not created, rc:%s\n",
 207                             strerror(-rc));
 208                 return rc;
 209         }
 210
 211         *tfs = (struct tf_session *)(tfp->session->core_data);
 212
 213         return 0;
 214 }
 215
 216 int
 217 tf_session_get_device(struct tf_session *tfs,
 218                       struct tf_dev_info **tfd)
 219 {
 220         *tfd = &tfs->dev;
 221
 222         return 0;
 223 }
 224
 225 int
 226 tf_session_get_fw_session_id(struct tf *tfp,
 227                              uint8_t *fw_session_id)
 228 {
 229         int rc;
 230         struct tf_session *tfs = NULL;
 231
 232         if (tfp->session == NULL) {
 233                 rc = -EINVAL;
 234                 TFP_DRV_LOG(ERR,
 235                             "Session not created, rc:%s\n",
 236                             strerror(-rc));
 237                 return rc;
 238         }
 239
 240         rc = tf_session_get_session(tfp, &tfs);
 241         if (rc)
 242                 return rc;
 243
 244         *fw_session_id = tfs->session_id.internal.fw_session_id;
 245
 246         return 0;
 247 }