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