drivers/infiniband/hw/cxgb3/iwch_ev.c

   1 /*
   2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 #include <linux/slab.h>
  33 #include <linux/mman.h>
  34 #include <net/sock.h>
  35 #include "iwch_provider.h"
  36 #include "iwch.h"
  37 #include "iwch_cm.h"
  38 #include "cxio_hal.h"
  39 #include "cxio_wr.h"
  40
  41 static void post_qp_event(struct iwch_dev *rnicp, struct iwch_cq *chp,
  42                           struct respQ_msg_t *rsp_msg,
  43                           enum ib_event_type ib_event,
  44                           int send_term)
  45 {
  46         struct ib_event event;
  47         struct iwch_qp_attributes attrs;
  48         struct iwch_qp *qhp;
  49
  50         spin_lock(&rnicp->lock);
  51         qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
  52
  53         if (!qhp) {
  54                 printk(KERN_ERR "%s unaffiliated error 0x%x qpid 0x%x\n",
  55                        __func__, CQE_STATUS(rsp_msg->cqe),
  56                        CQE_QPID(rsp_msg->cqe));
  57                 spin_unlock(&rnicp->lock);
  58                 return;
  59         }
  60
  61         if ((qhp->attr.state == IWCH_QP_STATE_ERROR) ||
  62             (qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
  63                 PDBG("%s AE received after RTS - "
  64                      "qp state %d qpid 0x%x status 0x%x\n", __func__,
  65                      qhp->attr.state, qhp->wq.qpid, CQE_STATUS(rsp_msg->cqe));
  66                 spin_unlock(&rnicp->lock);
  67                 return;
  68         }
  69
  70         printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
  71                "type %d wrid.hi 0x%x wrid.lo 0x%x \n", __func__,
  72                CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
  73                CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
  74                CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
  75
  76         atomic_inc(&qhp->refcnt);
  77         spin_unlock(&rnicp->lock);
  78
  79         event.event = ib_event;
  80         event.device = chp->ibcq.device;
  81         if (ib_event == IB_EVENT_CQ_ERR)
  82                 event.element.cq = &chp->ibcq;
  83         else
  84                 event.element.qp = &qhp->ibqp;
  85
  86         if (qhp->ibqp.event_handler)
  87                 (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);
  88
  89         if (qhp->attr.state == IWCH_QP_STATE_RTS) {
  90                 attrs.next_state = IWCH_QP_STATE_TERMINATE;
  91                 iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
  92                                &attrs, 1);
  93                 if (send_term)
  94                         iwch_post_terminate(qhp, rsp_msg);
  95         }
  96
  97         if (atomic_dec_and_test(&qhp->refcnt))
  98                 wake_up(&qhp->wait);
  99 }
 100
 101 void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb)
 102 {
 103         struct iwch_dev *rnicp;
 104         struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
 105         struct iwch_cq *chp;
 106         struct iwch_qp *qhp;
 107         u32 cqid = RSPQ_CQID(rsp_msg);
 108
 109         rnicp = (struct iwch_dev *) rdev_p->ulp;
 110         spin_lock(&rnicp->lock);
 111         chp = get_chp(rnicp, cqid);
 112         qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
 113         if (!chp || !qhp) {
 114                 printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
 115                        "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x \n",
 116                        cqid, CQE_QPID(rsp_msg->cqe),
 117                        CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
 118                        CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
 119                        CQE_WRID_LOW(rsp_msg->cqe));
 120                 spin_unlock(&rnicp->lock);
 121                 goto out;
 122         }
 123         iwch_qp_add_ref(&qhp->ibqp);
 124         atomic_inc(&chp->refcnt);
 125         spin_unlock(&rnicp->lock);
 126
 127         /*
 128          * 1) completion of our sending a TERMINATE.
 129          * 2) incoming TERMINATE message.
 130          */
 131         if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
 132             (CQE_STATUS(rsp_msg->cqe) == 0)) {
 133                 if (SQ_TYPE(rsp_msg->cqe)) {
 134                         PDBG("%s QPID 0x%x ep %p disconnecting\n",
 135                              __func__, qhp->wq.qpid, qhp->ep);
 136                         iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 137                 } else {
 138                         PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
 139                              qhp->wq.qpid);
 140                         post_qp_event(rnicp, chp, rsp_msg,
 141                                       IB_EVENT_QP_REQ_ERR, 0);
 142                         iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 143                 }
 144                 goto done;
 145         }
 146
 147         /* Bad incoming Read request */
 148         if (SQ_TYPE(rsp_msg->cqe) &&
 149             (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
 150                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 151                 goto done;
 152         }
 153
 154         /* Bad incoming write */
 155         if (RQ_TYPE(rsp_msg->cqe) &&
 156             (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
 157                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 158                 goto done;
 159         }
 160
 161         switch (CQE_STATUS(rsp_msg->cqe)) {
 162
 163         /* Completion Events */
 164         case TPT_ERR_SUCCESS:
 165
 166                 /*
 167                  * Confirm the destination entry if this is a RECV completion.
 168                  */
 169                 if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
 170                         dst_confirm(qhp->ep->dst);
 171                 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 172                 break;
 173
 174         case TPT_ERR_STAG:
 175         case TPT_ERR_PDID:
 176         case TPT_ERR_QPID:
 177         case TPT_ERR_ACCESS:
 178         case TPT_ERR_WRAP:
 179         case TPT_ERR_BOUND:
 180         case TPT_ERR_INVALIDATE_SHARED_MR:
 181         case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 182                 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 183                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
 184                 break;
 185
 186         /* Device Fatal Errors */
 187         case TPT_ERR_ECC:
 188         case TPT_ERR_ECC_PSTAG:
 189         case TPT_ERR_INTERNAL_ERR:
 190                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
 191                 break;
 192
 193         /* QP Fatal Errors */
 194         case TPT_ERR_OUT_OF_RQE:
 195         case TPT_ERR_PBL_ADDR_BOUND:
 196         case TPT_ERR_CRC:
 197         case TPT_ERR_MARKER:
 198         case TPT_ERR_PDU_LEN_ERR:
 199         case TPT_ERR_DDP_VERSION:
 200         case TPT_ERR_RDMA_VERSION:
 201         case TPT_ERR_OPCODE:
 202         case TPT_ERR_DDP_QUEUE_NUM:
 203         case TPT_ERR_MSN:
 204         case TPT_ERR_TBIT:
 205         case TPT_ERR_MO:
 206         case TPT_ERR_MSN_GAP:
 207         case TPT_ERR_MSN_RANGE:
 208         case TPT_ERR_RQE_ADDR_BOUND:
 209         case TPT_ERR_IRD_OVERFLOW:
 210                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 211                 break;
 212
 213         default:
 214                 printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
 215                        CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
 216                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 217                 break;
 218         }
 219 done:
 220         if (atomic_dec_and_test(&chp->refcnt))
 221                 wake_up(&chp->wait);
 222         iwch_qp_rem_ref(&qhp->ibqp);
 223 out:
 224         dev_kfree_skb_irq(skb);
 225 }