OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

pc-bios: s390x: cio.c cleanup and compile fix

Browse Source 
Let's initialize the structs at the beginning to ease reading and also
zeroing all other fields. This also makes the compiler stop
complaining about sense_id_ccw.flags being ored into when it's not
initialized.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200624075226.92728-2-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Janosch Frank 2020-06-24 03:52:15 -04:00 committed by Thomas Huth
parent fc1bff9589
commit 8c6cc7b9df
1 changed files with 22 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
pc-bios/s390-ccw/cio.c
View File

@ -49,13 +49,13 @@ void enable_subchannel(SubChannelId schid)
uint16_t cu_type(SubChannelId schid)
{
Ccw1 sense_id_ccw;
SenseId sense_data;
sense_id_ccw.cmd_code = CCW_CMD_SENSE_ID;
sense_id_ccw.cda = ptr2u32(&sense_data);
sense_id_ccw.count = sizeof(sense_data);
sense_id_ccw.flags |= CCW_FLAG_SLI;
Ccw1 sense_id_ccw = {
.cmd_code = CCW_CMD_SENSE_ID,
.flags = CCW_FLAG_SLI,
.count = sizeof(sense_data),
.cda = ptr2u32(&sense_data),
};
if (do_cio(schid, CU_TYPE_UNKNOWN, ptr2u32(&sense_id_ccw), CCW_FMT1)) {
panic("Failed to run SenseID CCw\n");
@ -67,13 +67,13 @@ uint16_t cu_type(SubChannelId schid)
int basic_sense(SubChannelId schid, uint16_t cutype, void *sense_data,
uint16_t data_size)
{
Ccw1 senseCcw;
Ccw1 senseCcw = {
.cmd_code = CCW_CMD_BASIC_SENSE,
.count = data_size,
.cda = ptr2u32(sense_data),
};
Irb irb;
senseCcw.cmd_code = CCW_CMD_BASIC_SENSE;
senseCcw.cda = ptr2u32(sense_data);
senseCcw.count = data_size;
return __do_cio(schid, ptr2u32(&senseCcw), CCW_FMT1, &irb);
}
@ -314,7 +314,17 @@ static void print_irb_err(Irb *irb)
*/
static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb)
{
CmdOrb orb = {};
/*
* QEMU's CIO implementation requires prefetch and 64-bit idaws. We
* allow all paths.
*/
CmdOrb orb = {
.fmt = fmt,
.pfch = 1,
.c64 = 1,
.lpm = 0xFF,
.cpa = ccw_addr,
};
int rc;
IPL_assert(fmt == 0 || fmt == 1, "Invalid ccw format");
@ -324,12 +334,6 @@ static int __do_cio(SubChannelId schid, uint32_t ccw_addr, int fmt, Irb *irb)
IPL_assert(ccw_addr <= 0xFFFFFF - 8, "Invalid ccw address");
}
orb.fmt = fmt;
orb.pfch = 1; /* QEMU's cio implementation requires prefetch */
orb.c64 = 1; /* QEMU's cio implementation requires 64-bit idaws */
orb.lpm = 0xFF; /* All paths allowed */
orb.cpa = ccw_addr;
rc = ssch(schid, &orb);
if (rc == 1 || rc == 2) {
/* Subchannel status pending or busy. Eat status and ask for retry. */