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/gfp.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        unsigned long flag;
  50
  51        spin_lock(&rnicp->lock);
  52        qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
  53
  54        if (!qhp) {
  55                pr_err("%s unaffiliated error 0x%x qpid 0x%x\n",
  56                       __func__, CQE_STATUS(rsp_msg->cqe),
  57                       CQE_QPID(rsp_msg->cqe));
  58                spin_unlock(&rnicp->lock);
  59                return;
  60        }
  61
  62        if ((qhp->attr.state == IWCH_QP_STATE_ERROR) ||
  63            (qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
  64                pr_debug("%s AE received after RTS - qp state %d qpid 0x%x status 0x%x\n",
  65                         __func__,
  66                         qhp->attr.state, qhp->wq.qpid,
  67                         CQE_STATUS(rsp_msg->cqe));
  68                spin_unlock(&rnicp->lock);
  69                return;
  70        }
  71
  72        pr_err("%s - AE qpid 0x%x opcode %d status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
  73               __func__,
  74               CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
  75               CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
  76               CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
  77
  78        atomic_inc(&qhp->refcnt);
  79        spin_unlock(&rnicp->lock);
  80
  81        if (qhp->attr.state == IWCH_QP_STATE_RTS) {
  82                attrs.next_state = IWCH_QP_STATE_TERMINATE;
  83                iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
  84                               &attrs, 1);
  85                if (send_term)
  86                        iwch_post_terminate(qhp, rsp_msg);
  87        }
  88
  89        event.event = ib_event;
  90        event.device = chp->ibcq.device;
  91        if (ib_event == IB_EVENT_CQ_ERR)
  92                event.element.cq = &chp->ibcq;
  93        else
  94                event.element.qp = &qhp->ibqp;
  95
  96        if (qhp->ibqp.event_handler)
  97                (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);
  98
  99        spin_lock_irqsave(&chp->comp_handler_lock, flag);
 100        (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 101        spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
 102
 103        if (atomic_dec_and_test(&qhp->refcnt))
 104                wake_up(&qhp->wait);
 105}
 106
 107void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb)
 108{
 109        struct iwch_dev *rnicp;
 110        struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
 111        struct iwch_cq *chp;
 112        struct iwch_qp *qhp;
 113        u32 cqid = RSPQ_CQID(rsp_msg);
 114        unsigned long flag;
 115
 116        rnicp = (struct iwch_dev *) rdev_p->ulp;
 117        spin_lock(&rnicp->lock);
 118        chp = get_chp(rnicp, cqid);
 119        qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
 120        if (!chp || !qhp) {
 121                pr_err("BAD AE cqid 0x%x qpid 0x%x opcode %d status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
 122                       cqid, CQE_QPID(rsp_msg->cqe),
 123                       CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
 124                       CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
 125                       CQE_WRID_LOW(rsp_msg->cqe));
 126                spin_unlock(&rnicp->lock);
 127                goto out;
 128        }
 129        iwch_qp_add_ref(&qhp->ibqp);
 130        atomic_inc(&chp->refcnt);
 131        spin_unlock(&rnicp->lock);
 132
 133        /*
 134         * 1) completion of our sending a TERMINATE.
 135         * 2) incoming TERMINATE message.
 136         */
 137        if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
 138            (CQE_STATUS(rsp_msg->cqe) == 0)) {
 139                if (SQ_TYPE(rsp_msg->cqe)) {
 140                        pr_debug("%s QPID 0x%x ep %p disconnecting\n",
 141                                 __func__, qhp->wq.qpid, qhp->ep);
 142                        iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 143                } else {
 144                        pr_debug("%s post REQ_ERR AE QPID 0x%x\n", __func__,
 145                                 qhp->wq.qpid);
 146                        post_qp_event(rnicp, chp, rsp_msg,
 147                                      IB_EVENT_QP_REQ_ERR, 0);
 148                        iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
 149                }
 150                goto done;
 151        }
 152
 153        /* Bad incoming Read request */
 154        if (SQ_TYPE(rsp_msg->cqe) &&
 155            (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
 156                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 157                goto done;
 158        }
 159
 160        /* Bad incoming write */
 161        if (RQ_TYPE(rsp_msg->cqe) &&
 162            (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
 163                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
 164                goto done;
 165        }
 166
 167        switch (CQE_STATUS(rsp_msg->cqe)) {
 168
 169        /* Completion Events */
 170        case TPT_ERR_SUCCESS:
 171
 172                /*
 173                 * Confirm the destination entry if this is a RECV completion.
 174                 */
 175                if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
 176                        dst_confirm(qhp->ep->dst);
 177                spin_lock_irqsave(&chp->comp_handler_lock, flag);
 178                (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 179                spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
 180                break;
 181
 182        case TPT_ERR_STAG:
 183        case TPT_ERR_PDID:
 184        case TPT_ERR_QPID:
 185        case TPT_ERR_ACCESS:
 186        case TPT_ERR_WRAP:
 187        case TPT_ERR_BOUND:
 188        case TPT_ERR_INVALIDATE_SHARED_MR:
 189        case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
 190                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
 191                break;
 192
 193        /* Device Fatal Errors */
 194        case TPT_ERR_ECC:
 195        case TPT_ERR_ECC_PSTAG:
 196        case TPT_ERR_INTERNAL_ERR:
 197                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
 198                break;
 199
 200        /* QP Fatal Errors */
 201        case TPT_ERR_OUT_OF_RQE:
 202        case TPT_ERR_PBL_ADDR_BOUND:
 203        case TPT_ERR_CRC:
 204        case TPT_ERR_MARKER:
 205        case TPT_ERR_PDU_LEN_ERR:
 206        case TPT_ERR_DDP_VERSION:
 207        case TPT_ERR_RDMA_VERSION:
 208        case TPT_ERR_OPCODE:
 209        case TPT_ERR_DDP_QUEUE_NUM:
 210        case TPT_ERR_MSN:
 211        case TPT_ERR_TBIT:
 212        case TPT_ERR_MO:
 213        case TPT_ERR_MSN_GAP:
 214        case TPT_ERR_MSN_RANGE:
 215        case TPT_ERR_RQE_ADDR_BOUND:
 216        case TPT_ERR_IRD_OVERFLOW:
 217                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 218                break;
 219
 220        default:
 221                pr_err("Unknown T3 status 0x%x QPID 0x%x\n",
 222                       CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
 223                post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
 224                break;
 225        }
 226done:
 227        if (atomic_dec_and_test(&chp->refcnt))
 228                wake_up(&chp->wait);
 229        iwch_qp_rem_ref(&qhp->ibqp);
 230out:
 231        dev_kfree_skb_irq(skb);
 232}
 233