/*      $NetBSD: efidisk.c,v 1.11 2024/01/06 21:26:43 mlelstv Exp $     */

/*-
 * Copyright (c) 2016 Kimihiro Nonaka <nonaka@netbsd.org>
 * 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 REGENTS 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 REGENTS 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.
 */

#define FSTYPENAMES     /* for sys/disklabel.h */

#include "efiboot.h"

#include <sys/param.h>  /* for howmany, required by <dev/raidframe/raidframevar.h> */
#include <sys/disklabel.h>
#include <sys/disklabel_gpt.h>

#include "biosdisk.h"
#include "biosdisk_ll.h"
#include "devopen.h"
#include "efidisk.h"
#include "bootinfo.h"

static struct efidiskinfo_lh efi_disklist;
static int nefidisks;
static struct btinfo_biosgeom *bibg;
static size_t bibg_len;

#define MAXDEVNAME 39 /* "NAME=" + 34 char part_name */

#include <dev/raidframe/raidframevar.h>
#define RF_COMPONENT_INFO_OFFSET   16384   /* from sys/dev/raidframe/rf_netbsdkintf.c */
#define RF_COMPONENT_LABEL_VERSION     2   /* from <dev/raidframe/rf_raid.h> */

#define RAIDFRAME_NDEV 16 /* abitrary limit to 15 raidframe devices */
struct efi_raidframe {
       int last_unit;
       int serial;
       const struct efidiskinfo *edi;
       int parent_part;
       char parent_name[MAXDEVNAME + 1];
       daddr_t offset;
       daddr_t size;
};

static void
dealloc_biosdisk_part(struct biosdisk_partition *part, int nparts)
{
        int i;

        for (i = 0; i < nparts; i++) {
                if (part[i].part_name != NULL) {
                        dealloc(part[i].part_name, BIOSDISK_PART_NAME_LEN);
                        part[i].part_name = NULL;
                }
        }

        dealloc(part, sizeof(*part) * nparts);

        return;
}

void
efi_disk_probe(void)
{
        EFI_STATUS status;
        UINTN i, nhandles;
        EFI_HANDLE *handles;
        EFI_BLOCK_IO *bio;
        EFI_BLOCK_IO_MEDIA *media;
        EFI_DEVICE_PATH *dp;
        struct efidiskinfo *edi;
        int dev, depth = -1;

        TAILQ_INIT(&efi_disklist);

        status = LibLocateHandle(ByProtocol, &BlockIoProtocol, NULL,
            &nhandles, &handles);
        if (EFI_ERROR(status))
                return;

        if (efi_bootdp != NULL)
                depth = efi_device_path_depth(efi_bootdp, MEDIA_DEVICE_PATH);

        /*
         * U-Boot incorrectly represents devices with a single
         * MEDIA_DEVICE_PATH component.  In that case include that
         * component into the matching, otherwise we'll blindly select
         * the first device.
         */
        if (depth == 0)
                depth = 1;

        for (i = 0; i < nhandles; i++) {
                status = uefi_call_wrapper(BS->HandleProtocol, 3, handles[i],
                    &BlockIoProtocol, (void **)&bio);
                if (EFI_ERROR(status))
                        continue;

                media = bio->Media;
                if (media->LogicalPartition || !media->MediaPresent)
                        continue;

                edi = alloc(sizeof(struct efidiskinfo));
                memset(edi, 0, sizeof(*edi));
                edi->type = BIOSDISK_TYPE_HD;
                edi->bio = bio;
                edi->media_id = media->MediaId;

                if (efi_bootdp != NULL && depth > 0) {
                        status = uefi_call_wrapper(BS->HandleProtocol, 3,
                            handles[i], &DevicePathProtocol, (void **)&dp);
                        if (EFI_ERROR(status))
                                goto next;
                        if (efi_device_path_ncmp(efi_bootdp, dp, depth) == 0) {
                                edi->bootdev = true;
                                TAILQ_INSERT_HEAD(&efi_disklist, edi,
                                    list);
                                continue;
                        }
                }
next:
                TAILQ_INSERT_TAIL(&efi_disklist, edi, list);
        }

        FreePool(handles);

        if (efi_bootdp_type == BOOT_DEVICE_TYPE_CD) {
                edi = TAILQ_FIRST(&efi_disklist);
                if (edi != NULL && edi->bootdev) {
                        edi->type = BIOSDISK_TYPE_CD;
                        TAILQ_REMOVE(&efi_disklist, edi, list);
                        TAILQ_INSERT_TAIL(&efi_disklist, edi, list);
                }
        }

        dev = 0x80;
        TAILQ_FOREACH(edi, &efi_disklist, list) {
                edi->dev = dev++;
                if (edi->type == BIOSDISK_TYPE_HD)
                        nefidisks++;
                if (edi->bootdev)
                        boot_biosdev = edi->dev;
        }

        bibg_len = sizeof(*bibg) + nefidisks * sizeof(struct bi_biosgeom_entry);
        bibg = alloc(bibg_len);
        if (bibg == NULL)
                return;

        bibg->num = nefidisks;

        i = 0;
        TAILQ_FOREACH(edi, &efi_disklist, list) {
                if (edi->type == BIOSDISK_TYPE_HD) {
                        memset(&bibg->disk[i], 0, sizeof(bibg->disk[i]));
                        bibg->disk[i].dev = edi->dev;
                        bibg->disk[i].flags = BI_GEOM_INVALID;
                }
                ++i;
        }
}

static void
efi_raidframe_probe(struct efi_raidframe *raidframe, int *raidframe_count,
                    const struct efidiskinfo *edi,
                    struct biosdisk_partition *part, int parent_part)

{
        int i = *raidframe_count;
        struct RF_ComponentLabel_s label;

        if (i + 1 > RAIDFRAME_NDEV)
                return;

        if (biosdisk_read_raidframe(edi->dev, part->offset, &label) != 0)
                return;

        if (label.version != RF_COMPONENT_LABEL_VERSION)
                return;

        raidframe[i].last_unit = label.last_unit;
        raidframe[i].serial = label.serial_number;
        raidframe[i].edi = edi;
        raidframe[i].parent_part = parent_part;
        if (part->part_name)
                strlcpy(raidframe[i].parent_name, part->part_name, MAXDEVNAME);
        else
                raidframe[i].parent_name[0] = '\0';
        raidframe[i].offset = part->offset;
        raidframe[i].size = label.__numBlocks;

        (*raidframe_count)++;

        return;
}

void
efi_disk_show(void)
{
        const struct efidiskinfo *edi;
        struct efi_raidframe raidframe[RAIDFRAME_NDEV];
        int raidframe_count = 0;
        EFI_BLOCK_IO_MEDIA *media;
        struct biosdisk_partition *part;
        uint64_t size;
        int i, j, nparts;
        bool first;

        TAILQ_FOREACH(edi, &efi_disklist, list) {
                media = edi->bio->Media;
                first = true;
                printf("disk ");
                switch (edi->type) {
                case BIOSDISK_TYPE_CD:
                        printf("cd0");
                        printf(" mediaId %u", media->MediaId);
                        if (edi->media_id != media->MediaId)
                                printf("(%u)", edi->media_id);
                        printf("\n");
                        printf("  cd0a\n");
                        break;
                case BIOSDISK_TYPE_HD:
                        printf("hd%d", edi->dev & 0x7f);
                        printf(" mediaId %u", media->MediaId);
                        if (edi->media_id != media->MediaId)
                                printf("(%u)", edi->media_id);
                        printf(" size ");
                        size = (media->LastBlock + 1) * media->BlockSize;
                        if (size >= (10ULL * 1024 * 1024 * 1024))
                                printf("%"PRIu64" GB", size / (1024 * 1024 * 1024));
                        else
                                printf("%"PRIu64" MB", size / (1024 * 1024));
                        printf("\n");
                        break;
                }
                if (edi->type != BIOSDISK_TYPE_HD)
                        continue;

                if (biosdisk_readpartition(edi->dev, 0, 0, &part, &nparts))
                        continue;

                for (i = 0; i < nparts; i++) {
                        if (part[i].size == 0)
                                continue;
                        if (part[i].fstype == FS_UNUSED)
                                continue;
                        if (part[i].fstype == FS_RAID) {
                                efi_raidframe_probe(raidframe, &raidframe_count,
                                                    edi, &part[i], i);
                        }
                        if (first) {
                                printf(" ");
                                first = false;
                        }
                        if (part[i].part_name && part[i].part_name[0])
                                printf(" NAME=%s(", part[i].part_name);
                        else
                                printf(" hd%d%c(", edi->dev & 0x7f, i + 'a');
                        if (part[i].guid != NULL)
                                printf("%s", part[i].guid->name);
                        else if (part[i].fstype < FSMAXTYPES)
                                printf("%s", fstypenames[part[i].fstype]);
                        else
                                printf("%d", part[i].fstype);
                        printf(")");
                }
                if (!first)
                        printf("\n");
                dealloc_biosdisk_part(part, nparts);
        }

        for (i = 0; i < raidframe_count; i++) {
                size_t secsize = raidframe[i].edi->bio->Media->BlockSize;
                printf("raidframe raid%d serial %d in ",
                       raidframe[i].last_unit, raidframe[i].serial);
                if (raidframe[i].parent_name[0])
                        printf("NAME=%s size ", raidframe[i].parent_name);
                else
                        printf("hd%d%c size ",
                               raidframe[i].edi->dev & 0x7f,
                               raidframe[i].parent_part + 'a');
                if (raidframe[i].size >= (10ULL * 1024 * 1024 * 1024 / secsize))
                        printf("%"PRIu64" GB",
                            raidframe[i].size / (1024 * 1024 * 1024 / secsize));
                else
                        printf("%"PRIu64" MB",
                            raidframe[i].size / (1024 * 1024 / secsize));
                printf("\n");

                if (biosdisk_readpartition(raidframe[i].edi->dev,
                    raidframe[i].offset + RF_PROTECTED_SECTORS,
                    raidframe[i].size,
                    &part, &nparts))
                        continue;

                first = 1;
                for (j = 0; j < nparts; j++) {
                        bool bootme = part[j].attr & GPT_ENT_ATTR_BOOTME;

                        if (part[j].size == 0)
                                continue;
                        if (part[j].fstype == FS_UNUSED)
                                continue;
                        if (part[j].fstype == FS_RAID) /* raid in raid? */
                                continue;
                        if (first) {
                                printf(" ");
                                first = 0;
                        }
                        if (part[j].part_name && part[j].part_name[0])
                                printf(" NAME=%s(", part[j].part_name);
                        else
                                printf(" raid%d%c(",
                                       raidframe[i].last_unit, j + 'a');
                        if (part[j].guid != NULL)
                                printf("%s", part[j].guid->name);
                        else if (part[j].fstype < FSMAXTYPES)
                                printf("%s",
                                  fstypenames[part[j].fstype]);
                        else
                                printf("%d", part[j].fstype);
                        printf("%s)", bootme ? ", bootme" : "");
                }

                if (first == 0)
                        printf("\n");

                dealloc_biosdisk_part(part, nparts);
        }
}

const struct efidiskinfo *
efidisk_getinfo(int dev)
{
        const struct efidiskinfo *edi;

        TAILQ_FOREACH(edi, &efi_disklist, list) {
                if (dev == edi->dev)
                        return edi;
        }
        return NULL;
}

/*
 * Return the number of hard disk drives.
 */
int
get_harddrives(void)
{
        return nefidisks;
}

int
efidisk_get_efi_system_partition(int dev, int *partition)
{
        extern const struct uuid GET_efi;
        const struct efidiskinfo *edi;
        struct biosdisk_partition *part;
        int i, nparts;

        edi = efidisk_getinfo(dev);
        if (edi == NULL)
                return ENXIO;

        if (edi->type != BIOSDISK_TYPE_HD)
                return ENOTSUP;

        if (biosdisk_readpartition(edi->dev, 0, 0, &part, &nparts))
                return EIO;

        for (i = 0; i < nparts; i++) {
                if (part[i].size == 0)
                        continue;
                if (part[i].fstype == FS_UNUSED)
                        continue;
                if (guid_is_equal(part[i].guid->guid, &GET_efi))
                        break;
        }
        dealloc_biosdisk_part(part, nparts);
        if (i == nparts)
                return ENOENT;

        *partition = i;
        return 0;
}

void
efidisk_getbiosgeom()
{
        BI_ADD(bibg, BTINFO_BIOSGEOM, bibg_len);
}