Commit 55042b95 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

atapi: implement READ DISC INFORMATION 



This command is not necessary for CD-ROM and DVD-ROM, but some versions of
udev trip on its absence.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 27395add

hw/ide/atapi.c

+31 −0
Original line number Diff line number Diff line
@@ -956,6 +956,36 @@ static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 
    ide_atapi_cmd_reply(s, 8, 8);

}



static void cmd_read_disc_information(IDEState *s, uint8_t* buf)

{

    uint8_t type = buf[1] & 7;

    uint32_t max_len = ube16_to_cpu(buf + 7);



    /* Types 1/2 are only defined for Blu-Ray.  */

    if (type != 0) {

        ide_atapi_cmd_error(s, ILLEGAL_REQUEST,

                            ASC_INV_FIELD_IN_CMD_PACKET);

        return;

    }



    memset(buf, 0, 34);

    buf[1] = 32;

    buf[2] = 0xe; /* last session complete, disc finalized */

    buf[3] = 1;   /* first track on disc */

    buf[4] = 1;   /* # of sessions */

    buf[5] = 1;   /* first track of last session */

    buf[6] = 1;   /* last track of last session */

    buf[7] = 0x20; /* unrestricted use */

    buf[8] = 0x00; /* CD-ROM or DVD-ROM */

    /* 9-10-11: most significant byte corresponding bytes 4-5-6 */

    /* 12-23: not meaningful for CD-ROM or DVD-ROM */

    /* 24-31: disc bar code */

    /* 32: disc application code */

    /* 33: number of OPC tables */



    ide_atapi_cmd_reply(s, 34, max_len);

}



static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf)

{

    int max_len;
@@ -1045,6 +1075,7 @@ static const struct { 
    [ 0x43 ] = { cmd_read_toc_pma_atip,             CHECK_READY },

    [ 0x46 ] = { cmd_get_configuration,             ALLOW_UA },

    [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },

    [ 0x51 ] = { cmd_read_disc_information,         CHECK_READY },

    [ 0x5a ] = { cmd_mode_sense, /* (10) */         0 },

    [ 0xa8 ] = { cmd_read, /* (12) */               CHECK_READY },

    [ 0xad ] = { cmd_read_dvd_structure,            CHECK_READY },