LXR linux/drivers/infiniband/hw/cxgb3/iwch

   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
  41static 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
 101void 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        }
 219done:
 220        if (atomic_dec_and_test(&chp->refcnt))
 221                wake_up(&chp->wait);
 222        iwch_qp_rem_ref(&qhp->ibqp);
 223out:
 224        dev_kfree_skb_irq(skb);
 225}
 226