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scsi-disk: add SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE quirk for Macintosh

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Both MacOS and A/UX make use of vendor-specific MODE SELECT commands with PF=0
to identify SCSI devices:

- MacOS sends a MODE SELECT command with PF=0 for the MODE_PAGE_VENDOR_SPECIFIC
  (0x0) mode page containing 2 bytes before initialising a disk

- A/UX (installed on disk) sends a MODE SELECT command with PF=0 during SCSI
  bus enumeration, and gets stuck in an infinite loop if it fails

Add a new SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE quirk to allow both
PF=0 MODE SELECT commands and implement a MODE_PAGE_VENDOR_SPECIFIC (0x0)
mode page which is compatible with MacOS.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20220622105314.802852-7-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Mark Cave-Ayland 2022-06-22 11:53:06 +01:00 committed by Paolo Bonzini
parent f7c30a0f41
commit 09274de1f7
3 changed files with 30 additions and 2 deletions
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30
hw/scsi/scsi-disk.c
View file

@ -1079,6 +1079,7 @@ static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
int page_control)
{
static const int mode_sense_valid[0x3f] = {
[MODE_PAGE_VENDOR_SPECIFIC] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
[MODE_PAGE_HD_GEOMETRY] = (1 << TYPE_DISK),
[MODE_PAGE_FLEXIBLE_DISK_GEOMETRY] = (1 << TYPE_DISK),
[MODE_PAGE_CACHING] = (1 << TYPE_DISK) | (1 << TYPE_ROM),
@ -1244,6 +1245,22 @@ static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
return -1;
}
case MODE_PAGE_VENDOR_SPECIFIC:
if (s->qdev.type == TYPE_DISK && (s->quirks &
(1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) {
length = 0x2;
if (page_control == 1) { /* Changeable Values */
p[0] = 0xff;
p[1] = 0xff;
break;
}
p[0] = 0;
p[1] = 0;
break;
} else {
return -1;
}
default:
return -1;
}
@ -1570,9 +1587,12 @@ static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf)
int bd_len;
int pass;
/* We only support PF=1, SP=0. */
if ((r->req.cmd.buf[1] & 0x11) != 0x10) {
goto invalid_field;
if (!(s->quirks &
(1 << SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE))) {
/* We only support PF=1, SP=0. */
goto invalid_field;
}
}
if (len < hdr_len) {
@ -3069,6 +3089,9 @@ static Property scsi_hd_properties[] = {
DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0),
DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
5),
DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState,
quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE,
0),
DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf),
DEFINE_PROP_END_OF_LIST(),
};
@ -3121,6 +3144,9 @@ static Property scsi_cd_properties[] = {
SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR, 0),
DEFINE_PROP_BIT("quirk_mode_sense_rom_use_dbd", SCSIDiskState, quirks,
SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD, 0),
DEFINE_PROP_BIT("quirk_mode_page_vendor_specific_apple", SCSIDiskState,
quirks, SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE,
0),
DEFINE_PROP_END_OF_LIST(),
};

1
include/hw/scsi/scsi.h
View file

@ -229,5 +229,6 @@ extern const SCSIReqOps scsi_generic_req_ops;
/* scsi-disk.c */
#define SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR 0
#define SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD 1
#define SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE 2
#endif

1
include/scsi/constants.h
View file

@ -225,6 +225,7 @@
#define TYPE_NO_LUN 0x7f
/* Mode page codes for mode sense/set */
#define MODE_PAGE_VENDOR_SPECIFIC 0x00
#define MODE_PAGE_R_W_ERROR 0x01
#define MODE_PAGE_HD_GEOMETRY 0x04
#define MODE_PAGE_FLEXIBLE_DISK_GEOMETRY 0x05