mgt/ibmf/ibmf_handlers.c

	ibmf_handlers.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * This file implements the callback handler logic common to send and receive
 * handling in IBMF.
 */

#include <sys/ib/mgt/ibmf/ibmf_impl.h>

extern int ibmf_trace_level;
extern ibmf_state_t *ibmf_statep;
extern void ibmf_saa_impl_ibt_async_handler(ibt_async_code_t code,
    ibt_async_event_t *event);

static void ibmf_i_process_completion(ibmf_ci_t *cip, ibt_wc_t *wcp);
static void ibmf_i_callback_clients(ib_guid_t hca_guid,
    ibmf_async_event_t evt);

/*
 * ibmf_ibt_async_handler():
 *  This function handles asynchronous events detected by the
 *  IBT framework.
 */
/* ARGSUSED */
void
ibmf_ibt_async_handler(void *clnt_private, ibt_hca_hdl_t hca_hdl,
    ibt_async_code_t code, ibt_async_event_t *event)
{
    ibmf_ci_t       *cip;

    IBMF_TRACE_3(IBMF_TNF_DEBUG, DPRINT_L3, ibmf_ibt_async_handler_start,
        IBMF_TNF_TRACE, "",
        "ibmf_ibt_async_handler: Code %x HCA GUID %016" PRIx64 " Port %d\n",
        tnf_uint, code, code, tnf_opaque, hca_guid, event->ev_hca_guid,
        tnf_uint, port, event->ev_port);

    /*
     * let ibmf_saa know events first hand
     */
    ibmf_saa_impl_ibt_async_handler(code, event);

    /*
     * call client callbacks and then fail if ANY client remains.
     */
    if (code == IBT_HCA_DETACH_EVENT) {

        ibmf_i_callback_clients(event->ev_hca_guid, IBMF_CI_OFFLINE);

        mutex_enter(&ibmf_statep->ibmf_mutex);
        cip = ibmf_statep->ibmf_ci_list;

        while (cip != NULL) {
            mutex_enter(&cip->ci_mutex);

            if (cip->ci_node_guid == event->ev_hca_guid) {

                mutex_exit(&cip->ci_mutex);
                break;
            }

            mutex_exit(&cip->ci_mutex);
            cip = cip->ci_next;
        }

        if (cip != NULL) {
            /*
             * found the right ci, check
             * if any clients are still registered
             * (Note that if we found the ci, chances are that
             * it was not released).
             */
            mutex_enter(&cip->ci_clients_mutex);

            if (cip->ci_clients != NULL) {

                IBMF_TRACE_1(IBMF_TNF_NODEBUG,
                    DPRINT_L1, ibmf_ibt_async_handler_err,
                    IBMF_TNF_TRACE, "",
                    "%s, returning failure\n",
                    tnf_string, msg,
                    "ibmf_ibt_async_handler: Found "
                    "clients still registered.");
            }
            mutex_exit(&cip->ci_clients_mutex);
        }
        mutex_exit(&ibmf_statep->ibmf_mutex);
    } else if (code == IBT_EVENT_SQD) {
        ibmf_ci_t   *cip;
        ibt_qp_hdl_t    qphdl = (ibt_qp_hdl_t)event->ev_chan_hdl;
        ibmf_alt_qp_t   *altqpp;
        boolean_t   found = B_FALSE;

        mutex_enter(&ibmf_statep->ibmf_mutex);

        cip = ibmf_statep->ibmf_ci_list;

        /*
         * An SQD event is received. We match the QP handle provided
         * with all the alternate QP handles maintained on the lists
         * of all the CI contexts. If a match is found, we wake
         * up the thread waiting in ibmf_modify_qp().
         */
        while (cip != NULL) {
            mutex_enter(&cip->ci_mutex);
            altqpp = cip->ci_alt_qp_list;
            while (altqpp != NULL) {
                if (altqpp->isq_qp_handle == qphdl) {
                    mutex_enter(&altqpp->isq_mutex);
                    cv_signal(&altqpp->isq_sqd_cv);
                    mutex_exit(&altqpp->isq_mutex);
                    found = B_TRUE;
                    break;
                }
                altqpp = altqpp->isq_next;
            }
            mutex_exit(&cip->ci_mutex);

            if (found)
                break;
            cip = cip->ci_next;
        }

        mutex_exit(&ibmf_statep->ibmf_mutex);

        if (!found)
            IBMF_TRACE_1(IBMF_TNF_NODEBUG,
                DPRINT_L1, ibmf_ibt_async_handler_err,
                IBMF_TNF_TRACE, "", "%s, ignoring event\n",
                tnf_string, msg, "ibmf_ibt_async_handler: SQD "
                "event for unknown QP received");
    }

    IBMF_TRACE_0(IBMF_TNF_DEBUG, DPRINT_L3, ibmf_ibt_async_handler_end,
        IBMF_TNF_TRACE, "", "ibmf_ibt_async_handler: exit.\n");
}

/*
 * ibmf_i_callback_clients():
 *  Finds the ci given in parameter.
 *  Calls the client callbacks with the event given in parameter.
 *  Note that client callbacks are called with all ibmf mutexes unlocked.
 */
static void
ibmf_i_callback_clients(ib_guid_t hca_guid, ibmf_async_event_t evt)
{
    ibmf_ci_t       *cip;
    ibmf_client_t       *clientp;

    int         nclients    = 0;
    ibmf_async_event_cb_t   *cb_array   = NULL;
    void            **cb_args_array = NULL;
    ibmf_handle_t       *client_array   = NULL;
    int         iclient;

    IBMF_TRACE_0(IBMF_TNF_DEBUG, DPRINT_L3, ibmf_i_callback_clients_start,
        IBMF_TNF_TRACE, "", "ibmf_i_callback_clients() enter\n");

    /* find ci */
    mutex_enter(&ibmf_statep->ibmf_mutex);
    cip = ibmf_statep->ibmf_ci_list;

    while (cip != NULL) {
        mutex_enter(&cip->ci_mutex);

        if (cip->ci_node_guid == hca_guid) {
            mutex_exit(&cip->ci_mutex);
            break;
        }

        mutex_exit(&cip->ci_mutex);
        cip = cip->ci_next;
    }

    if (cip == NULL) {

        IBMF_TRACE_1(IBMF_TNF_NODEBUG, DPRINT_L1,
            ibmf_i_callback_clients, IBMF_TNF_TRACE, "",
            "ibmf_i_callback_clients: "
            "ci = %016" PRIx64 "NOT found.\n",
            tnf_opaque, hca_guid, hca_guid);

        mutex_exit(&ibmf_statep->ibmf_mutex);
        goto bail;
    }

    /* found the right ci, count clients */
    mutex_enter(&cip->ci_clients_mutex);

    /* empty counting loop */
    for (clientp = cip->ci_clients, nclients = 0; clientp != NULL;
        clientp = clientp->ic_next, nclients++);

    IBMF_TRACE_2(IBMF_TNF_DEBUG, DPRINT_L3,
        ibmf_i_callback_clients, IBMF_TNF_TRACE, "",
        "ibmf_i_callback_clients: found %d clients, "
        "on ci = %016" PRIx64 "\n",
        tnf_int, nclients, nclients,
        tnf_opaque, hca_guid, hca_guid);

    /* no clients? bail */
    if (nclients == 0) {

        mutex_exit(&cip->ci_clients_mutex);
        mutex_exit(&ibmf_statep->ibmf_mutex);
        goto bail;
    }

    /* allocate callback, args, and client arrays */

    cb_array = kmem_zalloc(
        nclients * sizeof (ibmf_async_event_cb_t), KM_NOSLEEP);

    cb_args_array = kmem_zalloc(
        nclients * sizeof (void*), KM_NOSLEEP);

    client_array = kmem_zalloc(
        nclients * sizeof (ibmf_handle_t), KM_NOSLEEP);

    if (cb_array == NULL || cb_args_array == NULL ||
        client_array == NULL) {

        IBMF_TRACE_1(IBMF_TNF_NODEBUG, DPRINT_L1,
            ibmf_i_callback_clients_err, IBMF_TNF_ERROR, "",
            "ibmf_i_callback_clients: %s\n",
            tnf_string, msg, "could not allocate memory for "
            "callback arrays");

        mutex_exit(&cip->ci_clients_mutex);
        mutex_exit(&ibmf_statep->ibmf_mutex);
        goto bail;
    }

    /* build callback list */

    for (clientp = cip->ci_clients, iclient = 0;
        clientp != NULL;
        clientp = clientp->ic_next, iclient++) {

        cb_array[iclient]    = clientp->ic_async_cb;
        cb_args_array[iclient]   = clientp->ic_async_cb_arg;
        client_array[iclient]    = (ibmf_handle_t)clientp;
    }

    mutex_exit(&cip->ci_clients_mutex);
    mutex_exit(&ibmf_statep->ibmf_mutex);

    /*
     * All mutex unlocked, call back clients
     */
    for (iclient = 0; iclient < nclients; iclient++) {

        IBMF_TRACE_4(IBMF_TNF_DEBUG, DPRINT_L3,
            ibmf_i_callback_clients, IBMF_TNF_TRACE, "",
            "ibmf_i_callback_clients: client %d"
            ", handle = %016" PRIx64
            ", callback = %016" PRIx64 ", args = %016" PRIx64 "\n",
            tnf_int, iclient, iclient,
            tnf_opaque, handle, client_array[iclient],
            tnf_opaque, cb_ptr, cb_array[iclient],
            tnf_opaque, args_ptr, cb_args_array[iclient]);

        if (cb_array[iclient] != NULL)
            cb_array[iclient](client_array[iclient],
                cb_args_array[iclient], evt);
    }

bail:

    if (cb_array != NULL)
        kmem_free(cb_array, nclients * sizeof (ibmf_async_event_cb_t));

    if (cb_args_array != NULL)
        kmem_free(cb_args_array, nclients * sizeof (void*));

    if (client_array != NULL)
        kmem_free(client_array, nclients * sizeof (ibmf_handle_t));

    IBMF_TRACE_0(IBMF_TNF_DEBUG, DPRINT_L3, ibmf_i_callback_clients_end,
        IBMF_TNF_TRACE, "", "ibmf_i_callback_clients: exit.\n");
}

/*
 * ibmf_i_mad_completions():
 *  Check for a completion entry on the specified CQ and process it
 */
void
ibmf_i_mad_completions(ibt_cq_hdl_t cq_handle, void *arg)
{
    ibt_wc_t    cqe;
    ibt_status_t    status;
    ibmf_ci_t   *ibmf_cip;

    IBMF_TRACE_1(IBMF_TNF_DEBUG, DPRINT_L4,
        ibmf_i_mad_completions_start, IBMF_TNF_TRACE, "",
        "ibmf_i_mad_completions() enter, cq_hdl = %p\n",
        tnf_opaque, cq_handle, cq_handle);

    ibmf_cip = arg;

    ASSERT(ibmf_cip != NULL);

    /*
     * Pull a completion and process it
     */
    for (;;) {
        status = ibt_poll_cq(cq_handle, &cqe, 1, NULL);
        ASSERT(status != IBT_CQ_HDL_INVALID &&
            status != IBT_HCA_HDL_INVALID);
        if (status == IBT_CQ_EMPTY)
            break;

        /* process the completion */
        ibmf_i_process_completion(ibmf_cip, &cqe);
    }

    (void) ibt_enable_cq_notify(cq_handle, IBT_NEXT_COMPLETION);

    /*
     * Look for more completions just in case some came in before
     * we were able to reenable CQ notification
     */
    for (;;) {
        status = ibt_poll_cq(cq_handle, &cqe, 1, NULL);
        ASSERT(status != IBT_CQ_HDL_INVALID &&
            status != IBT_HCA_HDL_INVALID);
        if (status == IBT_CQ_EMPTY)
            break;

        /* process the completion */
        ibmf_i_process_completion(ibmf_cip, &cqe);
    }

    IBMF_TRACE_0(IBMF_TNF_DEBUG, DPRINT_L4, ibmf_i_mad_completions_end,
        IBMF_TNF_TRACE, "", "ibmf_i_mad_completions() exit\n");
}

/*
 * ibmf_i_process_completion():
 *  Process the send or receive completion
 */
static void
ibmf_i_process_completion(ibmf_ci_t *cip, ibt_wc_t *wcp)
{
    IBMF_TRACE_2(IBMF_TNF_DEBUG, DPRINT_L4,
        ibmf_i_process_completion_start, IBMF_TNF_TRACE, "",
        "ibmf_i_process_completion() enter, cip = %p, wcp = %p\n",
        tnf_opaque, cip, cip, tnf_opaque, wcp, wcp);

    if (IBMF_IS_RECV_WR_ID(wcp->wc_id) == B_TRUE) {
        /* completion from a receive queue */
        ibmf_i_handle_recv_completion(cip, wcp);
    } else {
        /* completion from a send queue */
        ibmf_i_handle_send_completion(cip, wcp);
    }

    IBMF_TRACE_0(IBMF_TNF_DEBUG, DPRINT_L4, ibmf_i_process_completion_end,
        IBMF_TNF_TRACE, "", "ibmf_i_process_completion() exit\n");
}

#ifdef DEBUG
static int ibmf_i_dump_mad_size = 0x40;
static int ibmf_i_dump_wcp_enable = 0;

/* ARGSUSED */
void
ibmf_i_dump_wcp(ibmf_ci_t *cip, ibt_wc_t *wcp, ibmf_recv_wqe_t  *recv_wqep)
{
    uchar_t *ptr;
    char buf[256], *sptr;
    int i, j;

    if (ibmf_i_dump_wcp_enable == 0)
        return;

    printf("wcp: sender lid %x port num %x path bits %x qp %x sl %x\n",
        wcp->wc_slid, recv_wqep->recv_port_num, wcp->wc_path_bits,
        wcp->wc_qpn, wcp->wc_sl);

    ptr = (uchar_t *)((uintptr_t)recv_wqep->recv_mem +
        sizeof (ib_grh_t));

    printf("mad:\n");
    /* first print multiples of 16bytes */
    for (i = ibmf_i_dump_mad_size; i >= 16; i -= 16) {
        for (sptr = buf, j = 0; j < 16; j++) {
            (void) sprintf(sptr, "%02x ", *ptr++);
            sptr += 3; /* 2 digits + space */
        }
        printf("%s\n", buf);
    }
    /* print the rest */
    if (i < 16) {
        for (sptr = buf, j = 0; j < i; j++) {
            (void) sprintf(sptr, "%02x ", *ptr++);
            sptr += 3; /* 2 digits + space */
        }
        printf("%s\n", buf);
    }
}
#endif /* DEBUG */