iwch_ev.c

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/*
 * 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/gfp.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;
    unsigned long flag;

    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",
               __func__, 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", __func__,
             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", __func__,
           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);

    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);
    }

    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);

    spin_lock_irqsave(&chp->comp_handler_lock, flag);
    (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
    spin_unlock_irqrestore(&chp->comp_handler_lock, flag);

    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);
    unsigned long flag;

    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",
                 __func__, qhp->wq.qpid, qhp->ep);
            iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
        } else {
            PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
                 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);
        spin_lock_irqsave(&chp->comp_handler_lock, flag);
        (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
        spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
        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:
        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);
}