/*-
 * Copyright (c) 2015 Baptiste Daroussin <bapt@FreeBSD.org>
 *
 * 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/cdefs.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/endian.h>

#include <errno.h>
#include <err.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "mpsutil.h"

MPS_TABLE(top, flash);

static int
flash_save(int argc, char **argv)
{
        const char *firmware_file;
        unsigned char *firmware_buffer = NULL;
        int error, fd, size;
        bool bios = false;
        ssize_t written = 0, ret = 0;

        if (argc < 2) {
                warnx("missing argument: expecting 'firmware' or bios'");
                return (EINVAL);
        }

        if (strcmp(argv[1], "bios") == 0) {
                bios = true;
        } else if (strcmp(argv[1], "firmware") != 0) {
                warnx("Invalid argument '%s', expecting 'firmware' or 'bios'",
                    argv[1]);
        }

        if (argc > 4) {
                warnx("save %s: extra arguments", argv[1]);
                return (EINVAL);
        }

        firmware_file = argv[1];
        if (argc == 3) {
                firmware_file = argv[2];
        }

        fd = mps_open(mps_unit);
        if (fd < 0) {
                error = errno;
                warn("mps_open");
                return (error);
        }

        if ((size = mps_firmware_get(fd, &firmware_buffer, bios)) < 0) {
                warnx("Fail to save %s", argv[1]);
                close(fd);
                return (1);
        }

        close(fd);
        if (size > 0) {
                fd = open(firmware_file, O_CREAT | O_TRUNC | O_RDWR, 0644);
                if (fd <0) {
                        error = errno;
                        warn("open");
                        free(firmware_buffer);
                        return (error);
                }
                while (written != size) {
                        if ((ret = write(fd, firmware_buffer + written, size - written)) <0) {
                                error = errno;
                                warn("write");
                                free(firmware_buffer);
                                close(fd);
                                return (error);
                        }
                        written += ret;
                }
                close(fd);
        }
        free(firmware_buffer);
        printf("%s successfully saved as %s\n", argv[1], firmware_file);
        return (0);
}

MPS_COMMAND(flash, save, flash_save, "[firmware|bios] [file]",
    "Save firmware/bios into a file");

static int
flash_update(int argc, char **argv)
{
        int error, fd;
        unsigned char *mem = NULL;
        struct stat st;
        bool bios = false;
        MPI2_FW_IMAGE_HEADER *fwheader;
        MPI2_IOC_FACTS_REPLY *facts;

        if (argc < 2) {
                warnx("missing argument: expecting 'firmware' or bios'");
                return (EINVAL);
        }

        if (strcmp(argv[1], "bios") == 0) {
                bios = true;
        } else if (strcmp(argv[1], "firmware") != 0) {
                warnx("Invalid argument '%s', expecting 'firmware' or 'bios'",
                    argv[1]);
        }

        if (argc > 4) {
                warnx("update firmware: extra arguments");
                return (EINVAL);
        }

        if (argc != 3) {
                warnx("no firmware specified");
                return (EINVAL);
        }

        if (stat(argv[2], &st) == -1) {
                error = errno;
                warn("stat");
                return (error);
        }

        fd = open(argv[2], O_RDONLY);
        if (fd < 0) {
                error = errno;
                warn("open");
                return (error);
        }

        mem = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
        if (mem == MAP_FAILED) {
                error = errno;
                warn("mmap");
                close(fd);
                return (error);
        }
        close(fd);

        fd = mps_open(mps_unit);
        if (fd < 0) {
                error = errno;
                warn("mps_open");
                munmap(mem, st.st_size);
                return (error);
        }

        if ((facts = mps_get_iocfacts(fd)) == NULL) {
                warnx("could not get controller IOCFacts\n");
                munmap(mem, st.st_size);
                close(fd);
                return (EINVAL);
        }

        if (bios) {
                /* Check boot record magic number */
                if (((mem[0x01]<<8) + mem[0x00]) != 0xaa55) {
                        warnx("Invalid bios: no boot record magic number");
                        munmap(mem, st.st_size);
                        close(fd);
                        free(facts);
                        return (1);
                }
                if ((st.st_size % 512) != 0) {
                        warnx("Invalid bios: size not a multiple of 512");
                        munmap(mem, st.st_size);
                        close(fd);
                        free(facts);
                        return (1);
                }
        } else {
                fwheader = (MPI2_FW_IMAGE_HEADER *)mem;
                if (le16toh(fwheader->VendorID) != MPI2_MFGPAGE_VENDORID_LSI) {
                        warnx("Invalid firmware:");
                        warnx("  Expected Vendor ID: %04x",
                            MPI2_MFGPAGE_VENDORID_LSI);
                        warnx("  Image Vendor ID: %04x", le16toh(fwheader->VendorID));
                        munmap(mem, st.st_size);
                        close(fd);
                        free(facts);
                        return (1);
                }

                if (le16toh(fwheader->ProductID) != facts->ProductID) {
                        warnx("Invalid image:");
                        warnx("  Expected Product ID: %04x", facts->ProductID);
                        warnx("  Image Product ID: %04x", le16toh(fwheader->ProductID));
                        munmap(mem, st.st_size);
                        close(fd);
                        free(facts);
                        return (1);
                }
        }

        printf("Updating %s...\n", argv[1]);
        if (mps_firmware_send(fd, mem, st.st_size, bios) < 0) {
                warnx("Fail to update %s", argv[1]);
                munmap(mem, st.st_size);
                close(fd);
                free(facts);
                return (1);
        }

        munmap(mem, st.st_size);
        close(fd);
        free(facts);
        printf("%s successfully updated\n", argv[1]);
        return (0);
}

MPS_COMMAND(flash, update, flash_update, "[firmware|bios] file",
    "Update firmware/bios");