/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (C) 2012-2013 Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/ioccom.h>
#include <sys/stat.h>

#include <ctype.h>
#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <libutil.h>
#include <paths.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

#include "nvmecontrol.h"

static void
print_bytes(void *data, uint32_t length)
{
        uint32_t        i, j;
        uint8_t         *p, *end;

        end = (uint8_t *)data + length;

        for (i = 0; i < length; i++) {
                p = (uint8_t *)data + (i*16);
                printf("%03x: ", i*16);
                for (j = 0; j < 16 && p < end; j++)
                        printf("%02x ", *p++);
                if (p >= end)
                        break;
                printf("\n");
        }
        printf("\n");
}

static void
print_dwords(void *data, uint32_t length)
{
        uint32_t        *p;
        uint32_t        i, j;

        p = (uint32_t *)data;
        length /= sizeof(uint32_t);

        for (i = 0; i < length; i+=8) {
                printf("%03x: ", i*4);
                for (j = 0; j < 8; j++)
                        printf("%08x ", p[i+j]);
                printf("\n");
        }

        printf("\n");
}

void
print_hex(void *data, uint32_t length)
{
        if (length >= sizeof(uint32_t) || length % sizeof(uint32_t) == 0)
                print_dwords(data, length);
        else
                print_bytes(data, length);
}

int
read_controller_data(int fd, struct nvme_controller_data *cdata)
{
        struct nvme_pt_command  pt;

        memset(&pt, 0, sizeof(pt));
        pt.cmd.opc = NVME_OPC_IDENTIFY;
        pt.cmd.cdw10 = htole32(1);
        pt.buf = cdata;
        pt.len = sizeof(*cdata);
        pt.is_read = 1;

        if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
                return (errno);

        /* Convert data to host endian */
        nvme_controller_data_swapbytes(cdata);

        if (nvme_completion_is_error(&pt.cpl))
                return (EIO);
        return (0);
}

int
read_namespace_data(int fd, uint32_t nsid, struct nvme_namespace_data *nsdata)
{
        struct nvme_pt_command  pt;

        memset(&pt, 0, sizeof(pt));
        pt.cmd.opc = NVME_OPC_IDENTIFY;
        pt.cmd.nsid = htole32(nsid);
        pt.cmd.cdw10 = htole32(0);
        pt.buf = nsdata;
        pt.len = sizeof(*nsdata);
        pt.is_read = 1;

        if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
                return (errno);

        /* Convert data to host endian */
        nvme_namespace_data_swapbytes(nsdata);

        if (nvme_completion_is_error(&pt.cpl))
                return (EIO);
        return (0);
}

int
read_active_namespaces(int fd, uint32_t nsid, struct nvme_ns_list *nslist)
{
        struct nvme_pt_command  pt;

        memset(&pt, 0, sizeof(pt));
        pt.cmd.opc = NVME_OPC_IDENTIFY;
        pt.cmd.nsid = htole32(nsid);
        pt.cmd.cdw10 = htole32(2);
        pt.buf = nslist;
        pt.len = sizeof(*nslist);
        pt.is_read = 1;

        if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
                return (errno);

        /* Convert data to host endian */
        nvme_ns_list_swapbytes(nslist);

        if (nvme_completion_is_error(&pt.cpl))
                return (EIO);
        return (0);
}

int
open_dev(const char *str, int *fd, int write, int exit_on_error)
{
        char            full_path[MAXPATHLEN];

        if (str[0] == '/')      /* Full path */
                strlcpy(full_path, str, sizeof(full_path));
        else                    /* Add /dev/ */
                snprintf(full_path, sizeof(full_path), _PATH_DEV"%s", str);
        *fd = open(full_path, write ? O_RDWR : O_RDONLY);
        if (*fd < 0) {
                if (exit_on_error) {
                        err(EX_OSFILE, "could not open %s%s", full_path,
                            write ? " for write" : "");
                } else
                        return (errno);
        }

        return (0);
}

void
get_nsid(int fd, char **ctrlr_str, uint32_t *nsid)
{
        struct nvme_get_nsid gnsid;

        if (ioctl(fd, NVME_GET_NSID, &gnsid) < 0)
                err(EX_OSERR, "NVME_GET_NSID ioctl failed");
        if (ctrlr_str != NULL)
                *ctrlr_str = strndup(gnsid.cdev, sizeof(gnsid.cdev));
        if (nsid != NULL)
                *nsid = gnsid.nsid;
}

int
main(int argc, char *argv[])
{
        static char dir[MAXPATHLEN];

        cmd_init();

        cmd_load_dir("/lib/nvmecontrol", NULL, NULL);
        snprintf(dir, MAXPATHLEN, "%s/lib/nvmecontrol", getlocalbase());
        cmd_load_dir(dir, NULL, NULL);

        cmd_dispatch(argc, argv, NULL);

        return (0);
}