/*
 * 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.
 */

/*
 * Copyright (c) 2018, Joyent, Inc.
 */

#include "ndievents.h"
#include <sys/sunndi.h>
#include <sys/ndi_impldefs.h>
#include <sys/dditypes.h>
#include <sys/ddi_impldefs.h>
#include <sys/sunddi.h>
#include <sys/param.h>


int
dip_to_pathname(struct dev_info *device, char *path, int buflen)
{
        char *bp;
        char *addr;
        char addr_str[32];
        char nodename[MAXNAMELEN];
        struct dev_info devi_parent;

        if (!device) {
                mdb_warn("Unable to access devinfo.");
                return (-1);
        }

        if (device->devi_parent == NULL) {
                if (mdb_readstr(nodename, sizeof (nodename),
                    (uintptr_t)device->devi_node_name) == -1) {
                        return (-1);
                }

                if (sizeof (nodename) > (buflen - strlen(path))) {
                        return (-1);
                }

                strncpy(path, nodename, sizeof (nodename));
                return (0);
        }

        if (mdb_vread(&devi_parent, sizeof (struct dev_info),
            (uintptr_t)device->devi_parent) == -1) {
                mdb_warn("Unable to access devi_parent at %p",
                    (uintptr_t)device->devi_parent);
                return (-1);
        }

        if (dip_to_pathname(&devi_parent, path, buflen) == -1) {
                return (-1);
        }

        if (mdb_readstr(nodename, sizeof (nodename),
            (uintptr_t)device->devi_node_name) == -1) {
                return (-1);
        }

        if (device->devi_node_state < DS_INITIALIZED) {
                addr_str[0] = '\0';
        } else {
                addr = device->devi_addr;
                if (mdb_readstr(addr_str, sizeof (addr_str),
                    (uintptr_t)addr) == -1) {
                        return (-1);
                }
        }

        bp = path + strlen(path);

        if (addr_str[0] == '\0') {
                (void) mdb_snprintf(bp, buflen - strlen(path), "/%s", nodename);
        } else {
                (void) mdb_snprintf(bp, buflen - strlen(path), "/%s@%s",
                    nodename, addr_str);
        }
        return (0);

}

/*ARGSUSED*/
int
ndi_callback_print(struct ndi_event_cookie *cookie, uint_t flags)
{

        struct ndi_event_callbacks *callback_list;
        struct ndi_event_callbacks cb;
        char device_path[MAXPATHLEN];
        struct dev_info devi;

        if (!cookie) {
                return (DCMD_ERR);
        }

        callback_list = cookie->callback_list;

        while (callback_list != NULL) {
                if (mdb_vread(&cb, sizeof (struct ndi_event_callbacks),
                    (uintptr_t)callback_list) == -1) {
                        mdb_warn("Could not read callback structure at"
                            " %p", callback_list);
                        return (DCMD_ERR);
                }

                if (mdb_vread(&devi, sizeof (struct dev_info),
                    (uintptr_t)cb.ndi_evtcb_dip) == -1) {
                        mdb_warn("Could not read devinfo structure at"
                            " %p", cb.ndi_evtcb_dip);
                        return (DCMD_ERR);
                }

                if (dip_to_pathname(&devi, device_path, sizeof (device_path))
                    == -1) {
                        return (DCMD_ERR);
                }

                mdb_printf("\t\tCallback Registered By: %s\n", device_path);
                mdb_printf("\t\t  Callback Address:\t%-?p\n"
                    "\t\t  Callback Function:\t%-p\n"
                    "\t\t  Callback Args:\t%-?p\n"
                    "\t\t  Callback Cookie:\t%-?p\n",
                    callback_list, cb.ndi_evtcb_callback, cb.ndi_evtcb_arg,
                    cb.ndi_evtcb_cookie);

                callback_list = cb.ndi_evtcb_next;

        }

        return (DCMD_OK);
}

int
ndi_event_print(struct ndi_event_hdl *hdl, uint_t flags)
{

        struct  ndi_event_definition def;
        struct  ndi_event_cookie cookie;
        struct  ndi_event_cookie *cookie_list;
        char    ndi_event_name[256];

        if (!hdl)
                return (DCMD_ERR);

        cookie_list = hdl->ndi_evthdl_cookie_list;
        if (cookie_list == NULL) {
                mdb_printf("\tNo cookies defined for this handle.\n");
                return (DCMD_OK);
        }

        while (cookie_list != NULL) {
                if (mdb_vread(&cookie, sizeof (struct ndi_event_cookie),
                    (uintptr_t)cookie_list) == -1) {
                        mdb_warn("Unable to access cookie list");
                        return (DCMD_ERR);
                }

                if (mdb_vread(&def, sizeof (struct ndi_event_definition),
                    (uintptr_t)cookie.definition) == -1) {
                        mdb_warn("Unable to access definition at %p",
                            cookie.definition);
                        return (DCMD_ERR);
                }

                if (mdb_readstr(ndi_event_name, sizeof (ndi_event_name),
                    (uintptr_t)def.ndi_event_name) == -1) {
                        mdb_warn("Unable to read cookie name.");
                        return (DCMD_ERR);
                }

                mdb_printf("\tCookie(%s %p) :Plevel(%d)\n\tddip(%p)"
                    " : Attr(%d)\n",
                    ndi_event_name, cookie_list, def.ndi_event_plevel,
                    cookie.ddip, def.ndi_event_attributes);

                ndi_callback_print(&cookie, flags);
                cookie_list = cookie.next_cookie;

        }
        return (0);
}

/*ARGSUSED*/
int
ndi_event_hdl(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{

        struct dev_info devi;
        struct ndi_event_hdl handle;
        char path[MAXPATHLEN];
        int done;

        if (!(flags & DCMD_ADDRSPEC)) {
                return (DCMD_USAGE);
        }

        if (mdb_vread(&handle, sizeof (struct ndi_event_hdl), addr) == -1) {
                mdb_warn("failed to read ndi_event_hdl at %p", addr);
                return (DCMD_ERR);
        }

        if (mdb_vread(&devi, sizeof (struct dev_info),
            (uintptr_t)handle.ndi_evthdl_dip) == -1) {
                mdb_warn("failed to read devinfo node at %p",
                    handle.ndi_evthdl_dip);
                return (DCMD_ERR);
        }

        if (dip_to_pathname(&devi, path, sizeof (path)) == -1) {
                return (DCMD_ERR);
        }

        done = 0;
        while (!done) {

                mdb_printf("%<b>Handle%</b> (%p) :%<b> Path%</b> (%s) : %<b>"
                    "dip %</b>(%p) \n", addr, path, handle.ndi_evthdl_dip);

                mdb_printf("mutexes:    handle(%p)      callback(%p)\n",
                    handle.ndi_evthdl_mutex, handle.ndi_evthdl_cb_mutex);

                ndi_event_print(&handle, flags);

                if (handle.ndi_next_hdl == NULL) {
                        done = 1;
                } else {
                        addr = (uintptr_t)handle.ndi_next_hdl;
                        if (mdb_vread(&handle, sizeof (struct ndi_event_hdl),
                            (uintptr_t)addr) == -1) {
                                mdb_warn("failed to read ndi_event_hdl at %p",
                                    addr);
                                break;
                        }

                }
        }

        return (0);
}