Merge remote-tracking branch 'origin/master'

[unleashed/lotheac.git] / usr / src / uts / common / io / ib / ibtl / ibtl_ibnex.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include <sys/systm.h>
#include <sys/sunndi.h>
#include <sys/sunmdi.h>
#include <sys/ib/ibtl/impl/ibtl.h>
#include <sys/ib/ibtl/impl/ibtl_ibnex.h>

/*
 * ibtl_ibnex.c
 *    These routines tie the Device Manager into IBTL.
 *
 *    ibt_reprobe_dev which can be called by IBTF clients.
 *    This results in calls to IBnexus callback.
 */

/*
 * Globals.
 */
static char             ibtl_ibnex[] = "ibtl_ibnex";
ibtl_ibnex_callback_t   ibtl_ibnex_callback_routine = NULL;

/*
 * Function:
 *      ibtl_ibnex_get_hca_info
 * Input:
 *      hca_guid        - The HCA's node GUID.
 *      flag            - Tells what to do
 *                      IBTL_IBNEX_LIST_CLNTS_FLAG - Build a NVLIST containing
 *                                              client's names, their AP_IDs and
 *                                              alternate_HCA information.
 *                                              (-x list_clients option)
 *                      IBTL_IBNEX_UNCFG_CLNTS_FLAG - Build a NVLIST containing
 *                                              clients' devpaths and their
 *                                              AP_IDs. (-x unconfig_clients)
 *      callback        - Callback function to get ap_id from ib(7d)
 * Output:
 *      buffer          - The information is returned in this buffer
 *      bufsiz          - The size of the information buffer
 * Returns:
 *      IBT_SUCCESS/IBT_HCA_INVALID/IBT_INVALID_PARAM
 * Description:
 *      For a given HCA node GUID it figures out the registered clients
 *      (ie. ones who called ibt_open_hca(9f) on this GUID) and creates
 *      a NVL packed buffer (of client names/ap_ids or devpaths) and returns
 *      it. If flag is not specified, then an error is returned.
 */
ibt_status_t
ibtl_ibnex_get_hca_info(ib_guid_t hca_guid, int flag, char **buffer,
    size_t *bufsiz, void (*callback)(dev_info_t *, char **))
{
        char                    *node_name;
        char                    *ret_apid;
        nvlist_t                *nvl;
        ibtl_hca_t              *ibt_hca;
        ibtl_clnt_t             *clntp;
        dev_info_t              *child;
        dev_info_t              *parent;
        ibtl_hca_devinfo_t      *hca_devp;

        IBTF_DPRINTF_L3(ibtl_ibnex, "ibtl_ibnex_get_hca_info: "
            "GUID  0x%llX, flag = 0x%x", hca_guid, flag);

        *buffer = NULL;
        *bufsiz = 0;

        /* verify that valid "flag" is passed */
        if (flag != IBTL_IBNEX_LIST_CLNTS_FLAG &&
            flag != IBTL_IBNEX_UNCFG_CLNTS_FLAG) {
                return (IBT_INVALID_PARAM);
        }

        mutex_enter(&ibtl_clnt_list_mutex);

        if ((hca_devp = ibtl_get_hcadevinfo(hca_guid)) == NULL) {
                mutex_exit(&ibtl_clnt_list_mutex);

                /*
                 * If we are here, then the requested HCA device is not
                 * present. Return the status as Invalid HCA GUID.
                 */
                IBTF_DPRINTF_L2(ibtl_ibnex, "ibtl_ibnex_get_hca_info: "
                    "HCA Not Found, Invalid HCA GUID 0x%llX", hca_guid);
                return (IBT_HCA_INVALID);
        }

        /* Walk the client list */
        ibt_hca = hca_devp->hd_clnt_list;
        (void) nvlist_alloc(&nvl, 0, KM_SLEEP);

        /* Allocate memory for ret_apid, instead of using stack */
        ret_apid = kmem_alloc(IBTL_IBNEX_APID_LEN, KM_SLEEP);

        while (ibt_hca != NULL) {
                clntp = ibt_hca->ha_clnt_devp;
                child = clntp->clnt_dip;
                IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_get_hca_info: "
                    "Client = %s", clntp->clnt_modinfop->mi_clnt_name);

                if (flag == IBTL_IBNEX_LIST_CLNTS_FLAG) {
                        (void) nvlist_add_string(nvl, "Client",
                            clntp->clnt_modinfop->mi_clnt_name);

                        /*
                         * Always check, first, if this client exists
                         * under this HCA anymore? If not, continue.
                         */
                        if (clntp->clnt_hca_list == NULL) {
                                (void) nvlist_add_string(nvl, "Alt_HCA", "no");
                                (void) nvlist_add_string(nvl, "ApID", "-");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        /* Check if this client has more than one HCAs */
                        if (clntp->clnt_hca_list->ha_hca_link == NULL)
                                (void) nvlist_add_string(nvl, "Alt_HCA", "no");
                        else
                                (void) nvlist_add_string(nvl, "Alt_HCA", "yes");

                        if (child == NULL) {
                                (void) nvlist_add_string(nvl, "ApID", "-");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        /*
                         * All IB clients (IOC, VPPA, Port, Pseudo etc.)
                         * need to be looked at. The parent of IOC nodes
                         * is "ib" nexus and node-name is "ioc". "VPPA/Port"s
                         * should have HCA as parent and node-name is "ibport".
                         * HCA validity is checked by looking at parent's "dip"
                         * and the dip saved in the ibtl_hca_devinfo_t.
                         * NOTE: We only want to list this HCA's IB clients.
                         * All others clients are ignored.
                         */
                        parent = ddi_get_parent(child);
                        if (parent == NULL || /* No parent? */
                            ddi_get_parent_data(child) == NULL) {
                                (void) nvlist_add_string(nvl, "ApID", "-");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        node_name = ddi_node_name(child);
                        if ((strcmp(ddi_node_name(parent), "ib") == 0) ||
                            ((hca_devp->hd_hca_dip == parent) &&
                            (strncmp(node_name, IBNEX_IBPORT_CNAME, 6) == 0))) {
                                ASSERT(callback != NULL);
                                /*
                                 * Callback is invoked to figure out the
                                 * ap_id string.
                                 */
                                callback(child, &ret_apid);
                                (void) nvlist_add_string(nvl, "ApID", ret_apid);
                        } else {
                                (void) nvlist_add_string(nvl, "ApID", "-");
                        }

                } else if (flag == IBTL_IBNEX_UNCFG_CLNTS_FLAG) {
                        char            path[MAXPATHLEN];

                        if (child == NULL) {
                                IBTF_DPRINTF_L4(ibtl_ibnex,
                                    "ibtl_ibnex_get_hca_info: No dip exists");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        /*
                         * if the child has a alternate HCA then skip it
                         */
                        if (clntp->clnt_hca_list->ha_hca_link) {
                                IBTF_DPRINTF_L4(ibtl_ibnex,
                                    "ibtl_ibnex_get_hca_info: Alt HCA exists");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        /*
                         * See earlier comments on how to check if a client
                         * is IOC, VPPA, Port or a Pseudo node.
                         */
                        parent = ddi_get_parent(child);
                        if (parent == NULL || /* No parent? */
                            ddi_get_parent_data(child) == NULL) {
                                IBTF_DPRINTF_L4(ibtl_ibnex,
                                    "ibtl_ibnex_get_hca_info: no parent");
                                ibt_hca = ibt_hca->ha_clnt_link;
                                continue;
                        }

                        node_name = ddi_node_name(child);
                        if ((strcmp(ddi_node_name(parent), "ib") == 0) ||
                            ((hca_devp->hd_hca_dip == parent) &&
                            (strncmp(node_name, IBNEX_IBPORT_CNAME, 6) == 0))) {
                                ASSERT(callback != NULL);
                                /*
                                 * Callback is invoked to figure out the
                                 * ap_id string.
                                 */
                                callback(child, &ret_apid);
                                (void) nvlist_add_string(nvl, "ApID", ret_apid);

                                /*
                                 * ddi_pathname() doesn't supply /devices,
                                 * so we do
                                 */
                                (void) strcpy(path, "/devices");
                                (void) ddi_pathname(child, path + strlen(path));
                                IBTF_DPRINTF_L4(ibtl_ibnex,
                                    "ibtl_ibnex_get_hca_info: "
                                    "device path = %s", path);

                                if (nvlist_add_string(nvl, "devpath", path)) {
                                        IBTF_DPRINTF_L2(ibtl_ibnex,
                                            "ibtl_ibnex_get_hca_info: "
                                            "failed to fill in path %s", path);
                                        mutex_exit(&ibtl_clnt_list_mutex);
                                        nvlist_free(nvl);
                                        kmem_free(ret_apid,
                                            IBTL_IBNEX_APID_LEN);
                                        return (ibt_get_module_failure(
                                            IBT_FAILURE_IBTL, 0));
                                }
                        } /* end of if */
                } /* end of while */

                ibt_hca = ibt_hca->ha_clnt_link;
        } /* End of while */
        mutex_exit(&ibtl_clnt_list_mutex);

        kmem_free(ret_apid, IBTL_IBNEX_APID_LEN);

        /* Pack all data into "buffer" */
        if (nvlist_pack(nvl, buffer, bufsiz, NV_ENCODE_NATIVE, KM_SLEEP)) {
                IBTF_DPRINTF_L2(ibtl_ibnex, "ibtl_ibnex_get_hca_info: "
                    "nvlist_pack failed");
                nvlist_free(nvl);
                return (ibt_get_module_failure(IBT_FAILURE_IBTL, 0));
        }

        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_get_hca_info: size = %x",
            *bufsiz);
        nvlist_free(nvl);
        return (IBT_SUCCESS);
}


/*
 * Function:
 *      ibtl_ibnex_register_callback()
 * Input:
 *      ibnex_cb        - IB nexus driver callback routine
 * Output:
 *      none
 * Returns:
 *      none
 * Description:
 *      Register a callback routine for IB nexus driver
 */
void
ibtl_ibnex_register_callback(ibtl_ibnex_callback_t ibnex_cb)
{
        IBTF_DPRINTF_L5(ibtl_ibnex, "ibtl_ibnex_register_callback:");

        mutex_enter(&ibtl_clnt_list_mutex);
        ibtl_ibnex_callback_routine = ibnex_cb;
        mutex_exit(&ibtl_clnt_list_mutex);
}

/*
 * Function:
 *      ibtl_ibnex_unregister_callback()
 * Input:
 *      none
 * Output:
 *      none
 * Returns:
 *      none
 * Description:
 *      Un-register a callback routine for IB nexus driver
 */
void
ibtl_ibnex_unregister_callback()
{
        IBTF_DPRINTF_L5(ibtl_ibnex, "ibtl_ibnex_unregister_callback: ibnex cb");

        mutex_enter(&ibtl_clnt_list_mutex);
        ibtl_ibnex_callback_routine = NULL;
        mutex_exit(&ibtl_clnt_list_mutex);
}


/*
 * Function:
 *      ibtl_ibnex_hcadip2guid
 * Input:
 *      dev_info_t      - The "dip" of this HCA
 * Output:
 *      hca_guid        - The HCA's node GUID.
 * Returns:
 *      "HCA GUID" on SUCCESS, NULL on FAILURE
 * Description:
 *      For a given HCA node GUID it figures out the HCA GUID
 *      and returns it. If not found, NULL is returned.
 */
ib_guid_t
ibtl_ibnex_hcadip2guid(dev_info_t *hca_dip)
{
        ib_guid_t               hca_guid = 0LL;
        ibtl_hca_devinfo_t      *hca_devp;

        mutex_enter(&ibtl_clnt_list_mutex);
        hca_devp = ibtl_hca_list;

        while (hca_devp) {
                if (hca_devp->hd_hca_dip == hca_dip) {
                        hca_guid = hca_devp->hd_hca_attr->hca_node_guid;
                        break;
                }
                hca_devp = hca_devp->hd_hca_dev_link;
        }
        mutex_exit(&ibtl_clnt_list_mutex);
        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_hcadip_guid: hca_guid 0x%llX",
            hca_guid);
        return (hca_guid);
}


/*
 * Function:
 *      ibtl_ibnex_hcaguid2dip
 * Input:
 *      hca_guid        - The HCA's node GUID.
 * Output:
 *      dev_info_t      - The "dip" of this HCA
 * Returns:
 *      "dip" on SUCCESS, NULL on FAILURE
 * Description:
 *      For a given HCA node GUID it figures out the "dip"
 *      and returns it. If not found, NULL is returned.
 */
dev_info_t *
ibtl_ibnex_hcaguid2dip(ib_guid_t hca_guid)
{
        dev_info_t              *dip = NULL;
        ibtl_hca_devinfo_t      *hca_devp;

        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_hcaguid2dip:");

        mutex_enter(&ibtl_clnt_list_mutex);
        hca_devp = ibtl_hca_list;

        while (hca_devp) {
                if (hca_devp->hd_hca_attr->hca_node_guid == hca_guid) {
                        dip = hca_devp->hd_hca_dip;
                        break;
                }
                hca_devp = hca_devp->hd_hca_dev_link;
        }
        mutex_exit(&ibtl_clnt_list_mutex);
        return (dip);
}


/*
 * Function:
 *      ibtl_ibnex_get_hca_verbose_data
 * Input:
 *      hca_guid        - The HCA's node GUID.
 * Output:
 *      buffer          - The information is returned in this buffer
 *      bufsiz          - The size of the information buffer
 * Returns:
 *      IBT_SUCCESS/IBT_HCA_INVALID
 * Description:
 *      For a given HCA node GUID it figures out the verbose listing display.
 */
ibt_status_t
ibtl_ibnex_get_hca_verbose_data(ib_guid_t hca_guid, char **buffer,
    size_t *bufsiz)
{
        char                    path[IBTL_IBNEX_STR_LEN];
        char                    tmp[MAXPATHLEN];
        uint_t                  ii;
        ibt_hca_portinfo_t      *pinfop;
        ibtl_hca_devinfo_t      *hca_devp;

        IBTF_DPRINTF_L3(ibtl_ibnex, "ibtl_ibnex_get_hca_verbose_data: "
            "HCA GUID 0x%llX", hca_guid);

        *buffer = NULL;
        *bufsiz = 0;

        mutex_enter(&ibtl_clnt_list_mutex);
        if ((hca_devp = ibtl_get_hcadevinfo(hca_guid)) == NULL) {
                mutex_exit(&ibtl_clnt_list_mutex);

                /*
                 * If we are here, then the requested HCA device is not
                 * present. Return the status as Invalid HCA GUID.
                 */
                IBTF_DPRINTF_L2(ibtl_ibnex, "ibtl_ibnex_get_hca_verbose_data: "
                    "HCA Not Found, Invalid HCA GUID");
                return (IBT_HCA_INVALID);
        }

        (void) snprintf(tmp, MAXPATHLEN, "VID: 0x%x, PID: 0x%x, #ports: 0x%x",
            hca_devp->hd_hca_attr->hca_vendor_id,
            hca_devp->hd_hca_attr->hca_device_id,
            hca_devp->hd_hca_attr->hca_nports);

        pinfop = hca_devp->hd_portinfop;
        for (ii = 0; ii < hca_devp->hd_hca_attr->hca_nports; ii++) {
                (void) snprintf(path, IBTL_IBNEX_STR_LEN,
                    ", port%d GUID: 0x%llX", ii + 1,
                    (longlong_t)pinfop[ii].p_sgid_tbl->gid_guid);
                (void) strcat(tmp, path);
        }
        mutex_exit(&ibtl_clnt_list_mutex);

        *bufsiz =  strlen(tmp);
        *buffer = kmem_alloc(*bufsiz, KM_SLEEP);
        (void) strncpy(*buffer, tmp, *bufsiz);

        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_get_hca_verbose_data: "
            "data = %s, size = 0x%x", *buffer, *bufsiz);
        return (IBT_SUCCESS);
}

/*
 * Function:
 *      ibt_reprobe_dev()
 * Input:
 *      dev_info_t      *dip
 * Output:
 *      none
 * Returns:
 *      Return value from IBnexus callback handler
 *              IBT_ILLEGAL_OP if IBnexus callback is not installed.
 * Description:
 *      This function passes the IBTF client's "reprobe device
 *              properties" request to IBnexus. See ibt_reprobe_dev(9f)
 *              for details.
 */
ibt_status_t
ibt_reprobe_dev(dev_info_t *dip)
{
        ibt_status_t            rv;
        ibtl_ibnex_cb_args_t    cb_args;

        if (dip == NULL)
                return (IBT_NOT_SUPPORTED);

        /*
         * Restricting the reprobe request to the children of
         * ibnexus. Note the IB_CONF_UPDATE_EVENT DDI event can
         * be subscribed by any device on the IBnexus device tree.
         */
        if (strcmp(ddi_node_name(ddi_get_parent(dip)), "ib") != 0)
                return (IBT_NOT_SUPPORTED);

        /* Reprobe for IOC nodes only */
        if (strncmp(ddi_node_name(dip), IBNEX_IBPORT_CNAME, 6) == 0)
                return (IBT_NOT_SUPPORTED);

        cb_args.cb_flag = IBTL_IBNEX_REPROBE_DEV_REQ;
        cb_args.cb_dip = dip;
        mutex_enter(&ibtl_clnt_list_mutex);
        if (ibtl_ibnex_callback_routine) {
                rv = (*ibtl_ibnex_callback_routine)(&cb_args);
                mutex_exit(&ibtl_clnt_list_mutex);
                return (rv);
        }
        mutex_exit(&ibtl_clnt_list_mutex);

        /* Should -not- come here */
        IBTF_DPRINTF_L2("ibtl", "ibt_reprobe_dev: ibnex not registered!!");
        return (IBT_ILLEGAL_OP);
}


/*
 * Function:
 *      ibtl_ibnex_valid_hca_parent
 * Input:
 *      pdip            - The parent dip from client's child dev_info_t
 * Output:
 *      NONE
 * Returns:
 *      IBT_SUCCESS/IBT_NO_HCAS_AVAILABLE
 * Description:
 *      For a given pdip, of Port/VPPA devices, match it against all the
 *      registered HCAs's dip.  If match found return IBT_SUCCESS,
 *      else IBT_NO_HCAS_AVAILABLE.
 *
 *      For IOC/Pseudo devices check if the given pdip is that of
 *      the ib(7d) nexus or that of the eoib(7d) nexus. If yes
 *      return IBT_SUCCESS, else IBT_NO_HCAS_AVAILABLE.
 */
ibt_status_t
ibtl_ibnex_valid_hca_parent(dev_info_t *pdip)
{
        ibtl_hca_devinfo_t      *hca_devp;

        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_valid_hca_parent: pdip %p",
            pdip);

        /* For Pseudo devices and IOCs */
        if (strncmp(ddi_node_name(pdip), "ib", 2) == 0 ||
            strncmp(ddi_node_name(pdip), "eibnx", 5) == 0) {
                return (IBT_SUCCESS);
        } else {
                /* For Port devices and VPPAs */
                mutex_enter(&ibtl_clnt_list_mutex);
                hca_devp = ibtl_hca_list;
                while (hca_devp) {
                        if (hca_devp->hd_hca_dip == pdip) {
                                mutex_exit(&ibtl_clnt_list_mutex);
                                return (IBT_SUCCESS);
                        }
                        hca_devp = hca_devp->hd_hca_dev_link;
                }
                mutex_exit(&ibtl_clnt_list_mutex);
                return (IBT_NO_HCAS_AVAILABLE);
        }
}

/*
 * Function:
 *      ibtl_ibnex_phci_register
 * Input:
 *      hca_dip         - The HCA dip
 * Output:
 *      NONE
 * Returns:
 *      IBT_SUCCESS/IBT_FAILURE
 * Description:
 *      Register the HCA dip as the MPxIO PCHI.
 */
ibt_status_t
ibtl_ibnex_phci_register(dev_info_t *hca_dip)
{
        /* Register the with MPxIO as PHCI */
        if (mdi_phci_register(MDI_HCI_CLASS_IB, hca_dip, 0) !=
            MDI_SUCCESS) {
                return (IBT_FAILURE);
        }
        return (IBT_SUCCESS);
}

/*
 * Function:
 *      ibtl_ibnex_phci_unregister
 * Input:
 *      hca_dip         - The HCA dip
 * Output:
 *      NONE
 * Returns:
 *      IBT_SUCCESS/IBT_FAILURE
 * Description:
 *      Free up any pending MPxIO Pathinfos and unregister the HCA dip as the
 *      MPxIO PCHI.
 */
ibt_status_t
ibtl_ibnex_phci_unregister(dev_info_t *hca_dip)
{
        mdi_pathinfo_t *pip = NULL;
        dev_info_t *vdip = 0;
        int circ = 0, circ1 = 0;

        /*
         * Should free all the Pathinfos associated with the HCA pdip before
         * unregistering the PHCI.
         *
         * mdi_pi_free will call ib_vhci_pi_uninit() callbackfor each PI where
         * the ibnex internal datastructures (ibnex_node_data) will have to be
         * cleaned up if needed.
         */
        vdip = mdi_devi_get_vdip(hca_dip);
        ndi_devi_enter(vdip, &circ1);
        ndi_devi_enter(hca_dip, &circ);
        while (pip = mdi_get_next_client_path(hca_dip, NULL)) {
                if (mdi_pi_free(pip, 0) == MDI_SUCCESS) {
                        continue;
                }
                ndi_devi_exit(hca_dip, circ);
                ndi_devi_exit(vdip, circ1);
                IBTF_DPRINTF_L1(ibtl_ibnex, "ibtl_ibnex_phci_unregister: "
                    "mdi_pi_free failed");
                return (IBT_FAILURE);
        }
        ndi_devi_exit(hca_dip, circ);
        ndi_devi_exit(vdip, circ1);

        if (mdi_phci_unregister(hca_dip, 0) != MDI_SUCCESS) {
                IBTF_DPRINTF_L1(ibtl_ibnex, "ibtl_ibnex_phci_unregister: PHCI "
                    "unregister failed");
                return (IBT_FAILURE);
        }
        return (IBT_SUCCESS);
}

/*
 * Function:
 *      ibtl_ibnex_query_hca_byguid
 * Input:
 *      hca_guid        - The HCA's node GUID.
 *      driver_name_size- size of the caller allocated driver_name buffer
 * Output:
 *      hca_attrs       - caller allocated buffer which will contain
 *                        HCA attributes upon success
 *      driver_name     - caller allocated buffer which will contain
 *                        HCA driver name upon success
 *      driver_instance - HCA driver instance
 *      hca_device_path - caller allocated buffer of size MAXPATHLEN which
 *                        will contain hca device path upon success.
 * Returns:
 *      IBT_SUCCESS/IBT_FAILURE
 * Description:
 *      Get the HCA attributes, driver name and instance number of the
 *      specified HCA.
 */
ibt_status_t
ibtl_ibnex_query_hca_byguid(ib_guid_t hca_guid, ibt_hca_attr_t *hca_attrs,
    char *driver_name, size_t driver_name_size, int *driver_instance,
    char *hca_device_path)
{
        ibtl_hca_devinfo_t      *hca_devp;

        IBTF_DPRINTF_L4(ibtl_ibnex, "ibtl_ibnex_query_hca_byguid("
            "hca_guid = 0x%llx, hca_attrs = 0x%p, driver_name = 0x%p, "
            "driver_name_size = 0x%d, driver_instancep = 0x%p)", hca_guid,
            hca_attrs, driver_name, (int)driver_name_size, driver_instance);

        mutex_enter(&ibtl_clnt_list_mutex);

        hca_devp = ibtl_get_hcadevinfo(hca_guid);
        if (hca_devp == NULL) {
                mutex_exit(&ibtl_clnt_list_mutex);
                return (IBT_HCA_INVALID);
        }

        if (strlcpy(driver_name,
            ddi_driver_name(hca_devp->hd_hca_dip), driver_name_size) >=
            driver_name_size) {
                mutex_exit(&ibtl_clnt_list_mutex);
                return (IBT_INSUFF_KERNEL_RESOURCE);
        }

        (void) ddi_pathname(hca_devp->hd_hca_dip, hca_device_path);
        *driver_instance = ddi_get_instance(hca_devp->hd_hca_dip);
        bcopy(hca_devp->hd_hca_attr, hca_attrs, sizeof (ibt_hca_attr_t));

        mutex_exit(&ibtl_clnt_list_mutex);
        return (IBT_SUCCESS);
}