4efe2886a5
The sole purpose of this change is to make sure that sizeof produces
"canonical" sizes for these structures. This is to avoid triggering
bugs in the BIOSes that properly handle only the canonical values of
input length provided to INT 13h AH=48h.
The canonical sizes are: 30 for v2, 66 for v3, etc.
Buggy BIOS code probably looks like:
if (input_length > 30) { /* > v2 */
assume that input length is 66 /* assume v3 or later */
}
This should fix boot problems at least on Supermicro X8DT6 and possibly
on P410i Smart Array Controller (as found in e.g. HP DL360 G7).
Reported by: gnn, np, rstone
Debugged by: rstone
Discussed with: ae, np, rstone
MFC after: 4 days
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*-
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* Copyright (c) 2011 Advanced Computing Technologies LLC
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* Written by: John H. Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _EDD_H_
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#define _EDD_H_
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/* Supported interfaces for "Check Extensions Present". */
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#define EDD_INTERFACE_FIXED_DISK 0x01
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#define EDD_INTERFACE_EJECT 0x02
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#define EDD_INTERFACE_EDD 0x04
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struct edd_packet {
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uint16_t len;
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uint16_t count;
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uint16_t off;
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uint16_t seg;
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uint64_t lba;
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};
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struct edd_packet_v3 {
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uint16_t len;
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uint16_t count;
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uint16_t off;
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uint16_t seg;
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uint64_t lba;
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uint64_t phys_addr;
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};
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struct edd_params {
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uint16_t len;
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uint16_t flags;
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uint32_t cylinders;
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uint32_t heads;
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uint32_t sectors_per_track;
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uint64_t sectors;
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uint16_t sector_size;
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uint16_t edd_params_seg;
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uint16_t edd_params_off;
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} __packed;
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struct edd_device_path_v3 {
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uint16_t key;
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uint8_t len;
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uint8_t reserved[3];
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char host_bus[4];
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char interface[8];
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uint64_t interface_path;
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uint64_t device_path;
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uint8_t reserved2[1];
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uint8_t checksum;
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} __packed;
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struct edd_params_v3 {
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struct edd_params params;
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struct edd_device_path_v3 device_path;
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} __packed;
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struct edd_device_path_v4 {
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uint16_t key;
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uint8_t len;
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uint8_t reserved[3];
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char host_bus[4];
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char interface[8];
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uint64_t interface_path;
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uint64_t device_path[2];
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uint8_t reserved2[1];
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uint8_t checksum;
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} __packed;
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struct edd_params_v4 {
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struct edd_params params;
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struct edd_device_path_v4 device_path;
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} __packed;
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#define EDD_FLAGS_DMA_BOUNDARY_HANDLING 0x0001
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#define EDD_FLAGS_REMOVABLE_MEDIA 0x0002
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#define EDD_FLAGS_WRITE_VERIFY 0x0004
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#define EDD_FLAGS_MEDIA_CHANGE_NOTIFICATION 0x0008
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#define EDD_FLAGS_LOCKABLE_MEDIA 0x0010
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#define EDD_FLAGS_NO_MEDIA_PRESENT 0x0020
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#define EDD_DEVICE_PATH_KEY 0xbedd
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#endif /* !_EDD_H_ */
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