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s390-bios: Add channel command codes/structs needed for dasd-ipl

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The dasd IPL procedure needs to execute a few previously unused
channel commands. Let's define them and their associated data
structures.

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-15-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Jason J. Herne 2019-04-04 10:34:33 -04:00 committed by Thomas Huth
parent 3668cb7ce8
commit 69333c36dc
1 changed files with 23 additions and 0 deletions
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23
pc-bios/s390-ccw/cio.h
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@ -200,11 +200,14 @@ typedef struct ccw1 {
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
/* Common CCW commands */
#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_SENSE_ID 0xe4
/* Virtio CCW commands */
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
#define CCW_CMD_READ_FEAT 0x12
@ -216,6 +219,12 @@ typedef struct ccw1 {
#define CCW_CMD_SET_CONF_IND 0x53
#define CCW_CMD_READ_VQ_CONF 0x32
/* DASD CCW commands */
#define CCW_CMD_DASD_READ 0x06
#define CCW_CMD_DASD_SEEK 0x07
#define CCW_CMD_DASD_SEARCH_ID_EQ 0x31
#define CCW_CMD_DASD_READ_MT 0x86
/*
* Command-mode operation request block
*/
@ -333,6 +342,20 @@ typedef struct irb {
__u32 emw[8];
} __attribute__ ((packed, aligned(4))) Irb;
/* Used for SEEK ccw commands */
typedef struct CcwSeekData {
uint16_t reserved;
uint16_t cyl;
uint16_t head;
} __attribute__((packed)) CcwSeekData;
/* Used for SEARCH ID ccw commands */
typedef struct CcwSearchIdData {
uint16_t cyl;
uint16_t head;
uint8_t record;
} __attribute__((packed)) CcwSearchIdData;
int enable_mss_facility(void);
void enable_subchannel(SubChannelId schid);
uint16_t cu_type(SubChannelId schid);