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      1 /* $NetBSD: efiblock.h,v 1.7 2022/04/24 06:49:38 mlelstv Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/queue.h>
     30 #include <sys/bootblock.h>
     31 #include <sys/disklabel.h>
     32 #include <sys/disklabel_gpt.h>
     33 
     34 enum efi_block_part_type {
     35 	EFI_BLOCK_PART_DISKLABEL,
     36 	EFI_BLOCK_PART_GPT,
     37 	EFI_BLOCK_PART_CD9660
     38 };
     39 
     40 struct efi_block_part;
     41 
     42 struct efi_block_dev {
     43 	uint16_t index;
     44 	EFI_DEVICE_PATH *path;
     45 	EFI_BLOCK_IO *bio;
     46 	EFI_DISK_IO *dio;
     47 	UINT32 media_id;
     48 	TAILQ_HEAD(, efi_block_part) partitions;
     49 
     50 	TAILQ_ENTRY(efi_block_dev) entries;
     51 };
     52 
     53 struct efi_block_part_disklabel {
     54 	uint32_t secsize;
     55 	struct partition part;
     56 };
     57 
     58 struct efi_block_part_gpt {
     59 	uint8_t fstype;
     60 	struct gpt_ent ent;
     61 };
     62 
     63 struct efi_block_part {
     64 	uint32_t index;
     65 	struct efi_block_dev *bdev;
     66 	enum efi_block_part_type type;
     67 	union {
     68 		struct efi_block_part_disklabel disklabel;
     69 		struct efi_block_part_gpt gpt;
     70 	};
     71 	uint8_t hash[16];
     72 
     73 	TAILQ_ENTRY(efi_block_part) entries;
     74 };
     75 
     76 void efi_block_probe(void);
     77 void efi_block_show(void);
     78 struct efi_block_part *efi_block_boot_part(void);
     79 
     80 int efi_block_open(struct open_file *, ...);
     81 int efi_block_close(struct open_file *);
     82 int efi_block_ioctl(struct open_file *, u_long, void *);
     83 int efi_block_strategy(void *, int, daddr_t, size_t, void *, size_t *);
     84 
     85 void efi_block_set_readahead(bool);
     86