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iwch_ev.c

/*
 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include <linux/slab.h>
#include <linux/mman.h>
#include <net/sock.h>
#include "iwch_provider.h"
#include "iwch.h"
#include "iwch_cm.h"
#include "cxio_hal.h"
#include "cxio_wr.h"

static void post_qp_event(struct iwch_dev *rnicp, struct iwch_cq *chp,
                    struct respQ_msg_t *rsp_msg,
                    enum ib_event_type ib_event,
                    int send_term)
{
      struct ib_event event;
      struct iwch_qp_attributes attrs;
      struct iwch_qp *qhp;

      spin_lock(&rnicp->lock);
      qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));

      if (!qhp) {
            printk(KERN_ERR "%s unaffiliated error 0x%x qpid 0x%x\n",
                   __FUNCTION__, CQE_STATUS(rsp_msg->cqe),
                   CQE_QPID(rsp_msg->cqe));
            spin_unlock(&rnicp->lock);
            return;
      }

      if ((qhp->attr.state == IWCH_QP_STATE_ERROR) ||
          (qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
            PDBG("%s AE received after RTS - "
                 "qp state %d qpid 0x%x status 0x%x\n", __FUNCTION__,
                 qhp->attr.state, qhp->wq.qpid, CQE_STATUS(rsp_msg->cqe));
            spin_unlock(&rnicp->lock);
            return;
      }

      printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
             "type %d wrid.hi 0x%x wrid.lo 0x%x \n", __FUNCTION__,
             CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
             CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
             CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));

      atomic_inc(&qhp->refcnt);
      spin_unlock(&rnicp->lock);

      event.event = ib_event;
      event.device = chp->ibcq.device;
      if (ib_event == IB_EVENT_CQ_ERR)
            event.element.cq = &chp->ibcq;
      else
            event.element.qp = &qhp->ibqp;

      if (qhp->ibqp.event_handler)
            (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);

      if (qhp->attr.state == IWCH_QP_STATE_RTS) {
            attrs.next_state = IWCH_QP_STATE_TERMINATE;
            iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
                         &attrs, 1);
            if (send_term)
                  iwch_post_terminate(qhp, rsp_msg);
      }

      if (atomic_dec_and_test(&qhp->refcnt))
            wake_up(&qhp->wait);
}

void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb)
{
      struct iwch_dev *rnicp;
      struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
      struct iwch_cq *chp;
      struct iwch_qp *qhp;
      u32 cqid = RSPQ_CQID(rsp_msg);

      rnicp = (struct iwch_dev *) rdev_p->ulp;
      spin_lock(&rnicp->lock);
      chp = get_chp(rnicp, cqid);
      qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
      if (!chp || !qhp) {
            printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
                   "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x \n",
                   cqid, CQE_QPID(rsp_msg->cqe),
                   CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
                   CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
                   CQE_WRID_LOW(rsp_msg->cqe));
            spin_unlock(&rnicp->lock);
            goto out;
      }
      iwch_qp_add_ref(&qhp->ibqp);
      atomic_inc(&chp->refcnt);
      spin_unlock(&rnicp->lock);

      /*
       * 1) completion of our sending a TERMINATE.
       * 2) incoming TERMINATE message.
       */
      if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
          (CQE_STATUS(rsp_msg->cqe) == 0)) {
            if (SQ_TYPE(rsp_msg->cqe)) {
                  PDBG("%s QPID 0x%x ep %p disconnecting\n",
                       __FUNCTION__, qhp->wq.qpid, qhp->ep);
                  iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
            } else {
                  PDBG("%s post REQ_ERR AE QPID 0x%x\n", __FUNCTION__,
                       qhp->wq.qpid);
                  post_qp_event(rnicp, chp, rsp_msg,
                              IB_EVENT_QP_REQ_ERR, 0);
                  iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
            }
            goto done;
      }

      /* Bad incoming Read request */
      if (SQ_TYPE(rsp_msg->cqe) &&
          (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
            goto done;
      }

      /* Bad incoming write */
      if (RQ_TYPE(rsp_msg->cqe) &&
          (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
            goto done;
      }

      switch (CQE_STATUS(rsp_msg->cqe)) {

      /* Completion Events */
      case TPT_ERR_SUCCESS:

            /*
             * Confirm the destination entry if this is a RECV completion.
             */
            if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
                  dst_confirm(qhp->ep->dst);
            (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
            break;

      case TPT_ERR_STAG:
      case TPT_ERR_PDID:
      case TPT_ERR_QPID:
      case TPT_ERR_ACCESS:
      case TPT_ERR_WRAP:
      case TPT_ERR_BOUND:
      case TPT_ERR_INVALIDATE_SHARED_MR:
      case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
            printk(KERN_ERR "%s - CQE Err qpid 0x%x opcode %d status 0x%x "
                   "type %d wrid.hi 0x%x wrid.lo 0x%x \n", __FUNCTION__,
                   CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
                   CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
                   CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
            (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
            break;

      /* Device Fatal Errors */
      case TPT_ERR_ECC:
      case TPT_ERR_ECC_PSTAG:
      case TPT_ERR_INTERNAL_ERR:
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
            break;

      /* QP Fatal Errors */
      case TPT_ERR_OUT_OF_RQE:
      case TPT_ERR_PBL_ADDR_BOUND:
      case TPT_ERR_CRC:
      case TPT_ERR_MARKER:
      case TPT_ERR_PDU_LEN_ERR:
      case TPT_ERR_DDP_VERSION:
      case TPT_ERR_RDMA_VERSION:
      case TPT_ERR_OPCODE:
      case TPT_ERR_DDP_QUEUE_NUM:
      case TPT_ERR_MSN:
      case TPT_ERR_TBIT:
      case TPT_ERR_MO:
      case TPT_ERR_MSN_GAP:
      case TPT_ERR_MSN_RANGE:
      case TPT_ERR_RQE_ADDR_BOUND:
      case TPT_ERR_IRD_OVERFLOW:
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
            break;

      default:
            printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
                   CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
            post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
            break;
      }
done:
      if (atomic_dec_and_test(&chp->refcnt))
              wake_up(&chp->wait);
      iwch_qp_rem_ref(&qhp->ibqp);
out:
      dev_kfree_skb_irq(skb);
}

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