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s390x/css: support format-0 ccws 

Add support for format-0 ccws in channel programs. As a format-1 ccw
contains the same information as format-0 ccws, only supporting larger
addresses, simply convert every ccw to format-1 as we walk the chain.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Cornelia Huck 2014-09-05 09:33:17 +02:00 committed by Christian Borntraeger
parent 450749141e
commit a327c9215d
3 changed files with 32 additions and 9 deletions
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30
hw/s390x/css.c
View File

@ -243,17 +243,25 @@ static void copy_sense_id_to_guest(SenseId *dest, SenseId *src)
}
}
static CCW1 copy_ccw_from_guest(hwaddr addr)
static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1)
{
CCW1 tmp;
CCW0 tmp0;
CCW1 tmp1;
CCW1 ret;
cpu_physical_memory_read(addr, &tmp, sizeof(tmp));
ret.cmd_code = tmp.cmd_code;
ret.flags = tmp.flags;
ret.count = be16_to_cpu(tmp.count);
ret.cda = be32_to_cpu(tmp.cda);
if (fmt1) {
cpu_physical_memory_read(addr, &tmp1, sizeof(tmp1));
ret.cmd_code = tmp1.cmd_code;
ret.flags = tmp1.flags;
ret.count = be16_to_cpu(tmp1.count);
ret.cda = be32_to_cpu(tmp1.cda);
} else {
cpu_physical_memory_read(addr, &tmp0, sizeof(tmp0));
ret.cmd_code = tmp0.cmd_code;
ret.flags = tmp0.flags;
ret.count = be16_to_cpu(tmp0.count);
ret.cda = be16_to_cpu(tmp0.cda1) | (tmp0.cda0 << 16);
}
return ret;
}
@ -268,7 +276,8 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr)
return -EIO;
}
ccw = copy_ccw_from_guest(ccw_addr);
/* Translate everything to format-1 ccws - the information is the same. */
ccw = copy_ccw_from_guest(ccw_addr, sch->ccw_fmt_1);
/* Check for invalid command codes. */
if ((ccw.cmd_code & 0x0f) == 0) {
@ -386,6 +395,7 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb)
s->ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
return;
}
sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT);
} else {
s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND);
}
@ -1347,6 +1357,7 @@ void subch_device_save(SubchDev *s, QEMUFile *f)
qemu_put_byte(f, s->id.ciw[i].command);
qemu_put_be16(f, s->id.ciw[i].count);
}
qemu_put_byte(f, s->ccw_fmt_1);
return;
}
@ -1402,6 +1413,7 @@ int subch_device_load(SubchDev *s, QEMUFile *f)
s->id.ciw[i].command = qemu_get_byte(f);
s->id.ciw[i].count = qemu_get_be16(f);
}
s->ccw_fmt_1 = qemu_get_byte(f);
return 0;
}

1
hw/s390x/css.h
View File

@ -76,6 +76,7 @@ struct SubchDev {
hwaddr channel_prog;
CCW1 last_cmd;
bool last_cmd_valid;
bool ccw_fmt_1;
bool thinint_active;
/* transport-provided data: */
int (*ccw_cb) (SubchDev *, CCW1);

10
target-s390x/ioinst.h
View File

@ -156,6 +156,16 @@ typedef struct ORB {
#define ORB_CTRL1_MASK_ORBX 0x01
#define ORB_CTRL1_MASK_INVALID 0x3e
/* channel command word (type 0) */
typedef struct CCW0 {
uint8_t cmd_code;
uint8_t cda0;
uint16_t cda1;
uint8_t flags;
uint8_t reserved;
uint16_t count;
} QEMU_PACKED CCW0;
/* channel command word (type 1) */
typedef struct CCW1 {
uint8_t cmd_code;