drivers/infiniband/hw/cxgb4/ev.c

   1 /*
   2  * Copyright (c) 2009-2010 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
  36 #include "iw_cxgb4.h"
  37
  38 static void post_qp_event(struct c4iw_dev *dev, struct c4iw_cq *chp,
  39                           struct c4iw_qp *qhp,
  40                           struct t4_cqe *err_cqe,
  41                           enum ib_event_type ib_event)
  42 {
  43         struct ib_event event;
  44         struct c4iw_qp_attributes attrs;
  45         unsigned long flag;
  46
  47         if ((qhp->attr.state == C4IW_QP_STATE_ERROR) ||
  48             (qhp->attr.state == C4IW_QP_STATE_TERMINATE)) {
  49                 pr_err("%s AE after RTS - qpid 0x%x opcode %d status 0x%x "\
  50                        "type %d wrid.hi 0x%x wrid.lo 0x%x\n",
  51                        __func__, CQE_QPID(err_cqe), CQE_OPCODE(err_cqe),
  52                        CQE_STATUS(err_cqe), CQE_TYPE(err_cqe),
  53                        CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe));
  54                 return;
  55         }
  56
  57         printk(KERN_ERR MOD "AE qpid 0x%x opcode %d status 0x%x "
  58                "type %d wrid.hi 0x%x wrid.lo 0x%x\n",
  59                CQE_QPID(err_cqe), CQE_OPCODE(err_cqe),
  60                CQE_STATUS(err_cqe), CQE_TYPE(err_cqe),
  61                CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe));
  62
  63         if (qhp->attr.state == C4IW_QP_STATE_RTS) {
  64                 attrs.next_state = C4IW_QP_STATE_TERMINATE;
  65                 c4iw_modify_qp(qhp->rhp, qhp, C4IW_QP_ATTR_NEXT_STATE,
  66                                &attrs, 0);
  67         }
  68
  69         event.event = ib_event;
  70         event.device = chp->ibcq.device;
  71         if (ib_event == IB_EVENT_CQ_ERR)
  72                 event.element.cq = &chp->ibcq;
  73         else
  74                 event.element.qp = &qhp->ibqp;
  75         if (qhp->ibqp.event_handler)
  76                 (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);
  77
  78         spin_lock_irqsave(&chp->comp_handler_lock, flag);
  79         (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
  80         spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
  81 }
  82
  83 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe)
  84 {
  85         struct c4iw_cq *chp;
  86         struct c4iw_qp *qhp;
  87         u32 cqid;
  88
  89         spin_lock_irq(&dev->lock);
  90         qhp = get_qhp(dev, CQE_QPID(err_cqe));
  91         if (!qhp) {
  92                 printk(KERN_ERR MOD "BAD AE qpid 0x%x opcode %d "
  93                        "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
  94                        CQE_QPID(err_cqe),
  95                        CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
  96                        CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
  97                        CQE_WRID_LOW(err_cqe));
  98                 spin_unlock_irq(&dev->lock);
  99                 goto out;
 100         }
 101
 102         if (SQ_TYPE(err_cqe))
 103                 cqid = qhp->attr.scq;
 104         else
 105                 cqid = qhp->attr.rcq;
 106         chp = get_chp(dev, cqid);
 107         if (!chp) {
 108                 printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
 109                        "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
 110                        cqid, CQE_QPID(err_cqe),
 111                        CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
 112                        CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
 113                        CQE_WRID_LOW(err_cqe));
 114                 spin_unlock_irq(&dev->lock);
 115                 goto out;
 116         }
 117
 118         c4iw_qp_add_ref(&qhp->ibqp);
 119         atomic_inc(&chp->refcnt);
 120         spin_unlock_irq(&dev->lock);
 121
 122         /* Bad incoming write */
 123         if (RQ_TYPE(err_cqe) &&
 124             (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE)) {
 125                 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_REQ_ERR);
 126                 goto done;
 127         }
 128
 129         switch (CQE_STATUS(err_cqe)) {
 130
 131         /* Completion Events */
 132         case T4_ERR_SUCCESS:
 133                 printk(KERN_ERR MOD "AE with status 0!\n");
 134                 break;
 135
 136         case T4_ERR_STAG:
 137         case T4_ERR_PDID:
 138         case T4_ERR_QPID:
 139         case T4_ERR_ACCESS:
 140         case T4_ERR_WRAP:
 141         case T4_ERR_BOUND:
 142         case T4_ERR_INVALIDATE_SHARED_MR:
 143         case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 144                 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_ACCESS_ERR);
 145                 break;
 146
 147         /* Device Fatal Errors */
 148         case T4_ERR_ECC:
 149         case T4_ERR_ECC_PSTAG:
 150         case T4_ERR_INTERNAL_ERR:
 151                 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_DEVICE_FATAL);
 152                 break;
 153
 154         /* QP Fatal Errors */
 155         case T4_ERR_OUT_OF_RQE:
 156         case T4_ERR_PBL_ADDR_BOUND:
 157         case T4_ERR_CRC:
 158         case T4_ERR_MARKER:
 159         case T4_ERR_PDU_LEN_ERR:
 160         case T4_ERR_DDP_VERSION:
 161         case T4_ERR_RDMA_VERSION:
 162         case T4_ERR_OPCODE:
 163         case T4_ERR_DDP_QUEUE_NUM:
 164         case T4_ERR_MSN:
 165         case T4_ERR_TBIT:
 166         case T4_ERR_MO:
 167         case T4_ERR_MSN_GAP:
 168         case T4_ERR_MSN_RANGE:
 169         case T4_ERR_RQE_ADDR_BOUND:
 170         case T4_ERR_IRD_OVERFLOW:
 171                 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
 172                 break;
 173
 174         default:
 175                 printk(KERN_ERR MOD "Unknown T4 status 0x%x QPID 0x%x\n",
 176                        CQE_STATUS(err_cqe), qhp->wq.sq.qid);
 177                 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
 178                 break;
 179         }
 180 done:
 181         if (atomic_dec_and_test(&chp->refcnt))
 182                 wake_up(&chp->wait);
 183         c4iw_qp_rem_ref(&qhp->ibqp);
 184 out:
 185         return;
 186 }
 187
 188 int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid)
 189 {
 190         struct c4iw_cq *chp;
 191         unsigned long flag;
 192
 193         chp = get_chp(dev, qid);
 194         if (chp) {
 195                 spin_lock_irqsave(&chp->comp_handler_lock, flag);
 196                 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 197                 spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
 198         } else
 199                 PDBG("%s unknown cqid 0x%x\n", __func__, qid);
 200         return 0;
 201 }