drivers/staging/rdma/amso1100/c2_ae.c

   1 /*
   2  * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
   3  * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 #include "c2.h"
  34 #include <rdma/iw_cm.h>
  35 #include "c2_status.h"
  36 #include "c2_ae.h"
  37
  38 static int c2_convert_cm_status(u32 c2_status)
  39 {
  40         switch (c2_status) {
  41         case C2_CONN_STATUS_SUCCESS:
  42                 return 0;
  43         case C2_CONN_STATUS_REJECTED:
  44                 return -ENETRESET;
  45         case C2_CONN_STATUS_REFUSED:
  46                 return -ECONNREFUSED;
  47         case C2_CONN_STATUS_TIMEDOUT:
  48                 return -ETIMEDOUT;
  49         case C2_CONN_STATUS_NETUNREACH:
  50                 return -ENETUNREACH;
  51         case C2_CONN_STATUS_HOSTUNREACH:
  52                 return -EHOSTUNREACH;
  53         case C2_CONN_STATUS_INVALID_RNIC:
  54                 return -EINVAL;
  55         case C2_CONN_STATUS_INVALID_QP:
  56                 return -EINVAL;
  57         case C2_CONN_STATUS_INVALID_QP_STATE:
  58                 return -EINVAL;
  59         case C2_CONN_STATUS_ADDR_NOT_AVAIL:
  60                 return -EADDRNOTAVAIL;
  61         default:
  62                 printk(KERN_ERR PFX
  63                        "%s - Unable to convert CM status: %d\n",
  64                        __func__, c2_status);
  65                 return -EIO;
  66         }
  67 }
  68
  69 static const char* to_event_str(int event)
  70 {
  71         static const char* event_str[] = {
  72                 "CCAE_REMOTE_SHUTDOWN",
  73                 "CCAE_ACTIVE_CONNECT_RESULTS",
  74                 "CCAE_CONNECTION_REQUEST",
  75                 "CCAE_LLP_CLOSE_COMPLETE",
  76                 "CCAE_TERMINATE_MESSAGE_RECEIVED",
  77                 "CCAE_LLP_CONNECTION_RESET",
  78                 "CCAE_LLP_CONNECTION_LOST",
  79                 "CCAE_LLP_SEGMENT_SIZE_INVALID",
  80                 "CCAE_LLP_INVALID_CRC",
  81                 "CCAE_LLP_BAD_FPDU",
  82                 "CCAE_INVALID_DDP_VERSION",
  83                 "CCAE_INVALID_RDMA_VERSION",
  84                 "CCAE_UNEXPECTED_OPCODE",
  85                 "CCAE_INVALID_DDP_QUEUE_NUMBER",
  86                 "CCAE_RDMA_READ_NOT_ENABLED",
  87                 "CCAE_RDMA_WRITE_NOT_ENABLED",
  88                 "CCAE_RDMA_READ_TOO_SMALL",
  89                 "CCAE_NO_L_BIT",
  90                 "CCAE_TAGGED_INVALID_STAG",
  91                 "CCAE_TAGGED_BASE_BOUNDS_VIOLATION",
  92                 "CCAE_TAGGED_ACCESS_RIGHTS_VIOLATION",
  93                 "CCAE_TAGGED_INVALID_PD",
  94                 "CCAE_WRAP_ERROR",
  95                 "CCAE_BAD_CLOSE",
  96                 "CCAE_BAD_LLP_CLOSE",
  97                 "CCAE_INVALID_MSN_RANGE",
  98                 "CCAE_INVALID_MSN_GAP",
  99                 "CCAE_IRRQ_OVERFLOW",
 100                 "CCAE_IRRQ_MSN_GAP",
 101                 "CCAE_IRRQ_MSN_RANGE",
 102                 "CCAE_IRRQ_INVALID_STAG",
 103                 "CCAE_IRRQ_BASE_BOUNDS_VIOLATION",
 104                 "CCAE_IRRQ_ACCESS_RIGHTS_VIOLATION",
 105                 "CCAE_IRRQ_INVALID_PD",
 106                 "CCAE_IRRQ_WRAP_ERROR",
 107                 "CCAE_CQ_SQ_COMPLETION_OVERFLOW",
 108                 "CCAE_CQ_RQ_COMPLETION_ERROR",
 109                 "CCAE_QP_SRQ_WQE_ERROR",
 110                 "CCAE_QP_LOCAL_CATASTROPHIC_ERROR",
 111                 "CCAE_CQ_OVERFLOW",
 112                 "CCAE_CQ_OPERATION_ERROR",
 113                 "CCAE_SRQ_LIMIT_REACHED",
 114                 "CCAE_QP_RQ_LIMIT_REACHED",
 115                 "CCAE_SRQ_CATASTROPHIC_ERROR",
 116                 "CCAE_RNIC_CATASTROPHIC_ERROR"
 117         };
 118
 119         if (event < CCAE_REMOTE_SHUTDOWN ||
 120             event > CCAE_RNIC_CATASTROPHIC_ERROR)
 121                 return "<invalid event>";
 122
 123         event -= CCAE_REMOTE_SHUTDOWN;
 124         return event_str[event];
 125 }
 126
 127 static const char *to_qp_state_str(int state)
 128 {
 129         switch (state) {
 130         case C2_QP_STATE_IDLE:
 131                 return "C2_QP_STATE_IDLE";
 132         case C2_QP_STATE_CONNECTING:
 133                 return "C2_QP_STATE_CONNECTING";
 134         case C2_QP_STATE_RTS:
 135                 return "C2_QP_STATE_RTS";
 136         case C2_QP_STATE_CLOSING:
 137                 return "C2_QP_STATE_CLOSING";
 138         case C2_QP_STATE_TERMINATE:
 139                 return "C2_QP_STATE_TERMINATE";
 140         case C2_QP_STATE_ERROR:
 141                 return "C2_QP_STATE_ERROR";
 142         default:
 143                 return "<invalid QP state>";
 144         }
 145 }
 146
 147 void c2_ae_event(struct c2_dev *c2dev, u32 mq_index)
 148 {
 149         struct c2_mq *mq = c2dev->qptr_array[mq_index];
 150         union c2wr *wr;
 151         void *resource_user_context;
 152         struct iw_cm_event cm_event;
 153         struct ib_event ib_event;
 154         enum c2_resource_indicator resource_indicator;
 155         enum c2_event_id event_id;
 156         unsigned long flags;
 157         int status;
 158         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_event.local_addr;
 159         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_event.remote_addr;
 160
 161         /*
 162          * retrieve the message
 163          */
 164         wr = c2_mq_consume(mq);
 165         if (!wr)
 166                 return;
 167
 168         memset(&ib_event, 0, sizeof(ib_event));
 169         memset(&cm_event, 0, sizeof(cm_event));
 170
 171         event_id = c2_wr_get_id(wr);
 172         resource_indicator = be32_to_cpu(wr->ae.ae_generic.resource_type);
 173         resource_user_context =
 174             (void *) (unsigned long) wr->ae.ae_generic.user_context;
 175
 176         status = cm_event.status = c2_convert_cm_status(c2_wr_get_result(wr));
 177
 178         pr_debug("event received c2_dev=%p, event_id=%d, "
 179                 "resource_indicator=%d, user_context=%p, status = %d\n",
 180                 c2dev, event_id, resource_indicator, resource_user_context,
 181                 status);
 182
 183         switch (resource_indicator) {
 184         case C2_RES_IND_QP:{
 185
 186                 struct c2_qp *qp = resource_user_context;
 187                 struct iw_cm_id *cm_id = qp->cm_id;
 188                 struct c2wr_ae_active_connect_results *res;
 189
 190                 if (!cm_id) {
 191                         pr_debug("event received, but cm_id is <nul>, qp=%p!\n",
 192                                 qp);
 193                         goto ignore_it;
 194                 }
 195                 pr_debug("%s: event = %s, user_context=%llx, "
 196                         "resource_type=%x, "
 197                         "resource=%x, qp_state=%s\n",
 198                         __func__,
 199                         to_event_str(event_id),
 200                         (unsigned long long) wr->ae.ae_generic.user_context,
 201                         be32_to_cpu(wr->ae.ae_generic.resource_type),
 202                         be32_to_cpu(wr->ae.ae_generic.resource),
 203                         to_qp_state_str(be32_to_cpu(wr->ae.ae_generic.qp_state)));
 204
 205                 c2_set_qp_state(qp, be32_to_cpu(wr->ae.ae_generic.qp_state));
 206
 207                 switch (event_id) {
 208                 case CCAE_ACTIVE_CONNECT_RESULTS:
 209                         res = &wr->ae.ae_active_connect_results;
 210                         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
 211                         laddr->sin_addr.s_addr = res->laddr;
 212                         raddr->sin_addr.s_addr = res->raddr;
 213                         laddr->sin_port = res->lport;
 214                         raddr->sin_port = res->rport;
 215                         if (status == 0) {
 216                                 cm_event.private_data_len =
 217                                         be32_to_cpu(res->private_data_length);
 218                                 cm_event.private_data = res->private_data;
 219                         } else {
 220                                 spin_lock_irqsave(&qp->lock, flags);
 221                                 if (qp->cm_id) {
 222                                         qp->cm_id->rem_ref(qp->cm_id);
 223                                         qp->cm_id = NULL;
 224                                 }
 225                                 spin_unlock_irqrestore(&qp->lock, flags);
 226                                 cm_event.private_data_len = 0;
 227                                 cm_event.private_data = NULL;
 228                         }
 229                         if (cm_id->event_handler)
 230                                 cm_id->event_handler(cm_id, &cm_event);
 231                         break;
 232                 case CCAE_TERMINATE_MESSAGE_RECEIVED:
 233                 case CCAE_CQ_SQ_COMPLETION_OVERFLOW:
 234                         ib_event.device = &c2dev->ibdev;
 235                         ib_event.element.qp = &qp->ibqp;
 236                         ib_event.event = IB_EVENT_QP_REQ_ERR;
 237
 238                         if (qp->ibqp.event_handler)
 239                                 qp->ibqp.event_handler(&ib_event,
 240                                                        qp->ibqp.
 241                                                        qp_context);
 242                         break;
 243                 case CCAE_BAD_CLOSE:
 244                 case CCAE_LLP_CLOSE_COMPLETE:
 245                 case CCAE_LLP_CONNECTION_RESET:
 246                 case CCAE_LLP_CONNECTION_LOST:
 247                         BUG_ON(cm_id->event_handler==(void*)0x6b6b6b6b);
 248
 249                         spin_lock_irqsave(&qp->lock, flags);
 250                         if (qp->cm_id) {
 251                                 qp->cm_id->rem_ref(qp->cm_id);
 252                                 qp->cm_id = NULL;
 253                         }
 254                         spin_unlock_irqrestore(&qp->lock, flags);
 255                         cm_event.event = IW_CM_EVENT_CLOSE;
 256                         cm_event.status = 0;
 257                         if (cm_id->event_handler)
 258                                 cm_id->event_handler(cm_id, &cm_event);
 259                         break;
 260                 default:
 261                         BUG_ON(1);
 262                         pr_debug("%s:%d Unexpected event_id=%d on QP=%p, "
 263                                 "CM_ID=%p\n",
 264                                 __func__, __LINE__,
 265                                 event_id, qp, cm_id);
 266                         break;
 267                 }
 268                 break;
 269         }
 270
 271         case C2_RES_IND_EP:{
 272
 273                 struct c2wr_ae_connection_request *req =
 274                         &wr->ae.ae_connection_request;
 275                 struct iw_cm_id *cm_id =
 276                         resource_user_context;
 277
 278                 pr_debug("C2_RES_IND_EP event_id=%d\n", event_id);
 279                 if (event_id != CCAE_CONNECTION_REQUEST) {
 280                         pr_debug("%s: Invalid event_id: %d\n",
 281                                 __func__, event_id);
 282                         break;
 283                 }
 284                 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
 285                 cm_event.provider_data = (void*)(unsigned long)req->cr_handle;
 286                 laddr->sin_addr.s_addr = req->laddr;
 287                 raddr->sin_addr.s_addr = req->raddr;
 288                 laddr->sin_port = req->lport;
 289                 raddr->sin_port = req->rport;
 290                 cm_event.private_data_len =
 291                         be32_to_cpu(req->private_data_length);
 292                 cm_event.private_data = req->private_data;
 293                 /*
 294                  * Until ird/ord negotiation via MPAv2 support is added, send
 295                  * max supported values
 296                  */
 297                 cm_event.ird = cm_event.ord = 128;
 298
 299                 if (cm_id->event_handler)
 300                         cm_id->event_handler(cm_id, &cm_event);
 301                 break;
 302         }
 303
 304         case C2_RES_IND_CQ:{
 305                 struct c2_cq *cq =
 306                     resource_user_context;
 307
 308                 pr_debug("IB_EVENT_CQ_ERR\n");
 309                 ib_event.device = &c2dev->ibdev;
 310                 ib_event.element.cq = &cq->ibcq;
 311                 ib_event.event = IB_EVENT_CQ_ERR;
 312
 313                 if (cq->ibcq.event_handler)
 314                         cq->ibcq.event_handler(&ib_event,
 315                                                cq->ibcq.cq_context);
 316                 break;
 317         }
 318
 319         default:
 320                 printk("Bad resource indicator = %d\n",
 321                        resource_indicator);
 322                 break;
 323         }
 324
 325  ignore_it:
 326         c2_mq_free(mq);
 327 }