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s390x: add I/O adapter registration

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Register an I/O adapter interrupt source for when virtio-ccw devices start
using adapter interrupts.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Cornelia Huck 2013-07-15 17:45:03 +02:00
parent 7b35d0c44c
commit 03cf077ac9
7 changed files with 106 additions and 0 deletions
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50
hw/s390x/css.c
View file

@ -16,6 +16,7 @@
#include "ioinst.h"
#include "css.h"
#include "trace.h"
#include "hw/s390x/s390_flic.h"
typedef struct CrwContainer {
CRW crw;
@ -39,6 +40,13 @@ typedef struct CssImage {
ChpInfo chpids[MAX_CHPID + 1];
} CssImage;
typedef struct IoAdapter {
uint32_t id;
uint8_t type;
uint8_t isc;
QTAILQ_ENTRY(IoAdapter) sibling;
} IoAdapter;
typedef struct ChannelSubSys {
QTAILQ_HEAD(, CrwContainer) pending_crws;
bool do_crw_mchk;
@ -49,6 +57,7 @@ typedef struct ChannelSubSys {
uint64_t chnmon_area;
CssImage *css[MAX_CSSID + 1];
uint8_t default_cssid;
QTAILQ_HEAD(, IoAdapter) io_adapters;
} ChannelSubSys;
static ChannelSubSys *channel_subsys;
@ -69,6 +78,46 @@ int css_create_css_image(uint8_t cssid, bool default_image)
return 0;
}
int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
bool maskable, uint32_t *id)
{
IoAdapter *adapter;
bool found = false;
int ret;
S390FLICState *fs = s390_get_flic();
S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
*id = 0;
QTAILQ_FOREACH(adapter, &channel_subsys->io_adapters, sibling) {
if ((adapter->type == type) && (adapter->isc == isc)) {
*id = adapter->id;
found = true;
ret = 0;
break;
}
if (adapter->id >= *id) {
*id = adapter->id + 1;
}
}
if (found) {
goto out;
}
adapter = g_new0(IoAdapter, 1);
ret = fsc->register_io_adapter(fs, *id, isc, swap, maskable);
if (ret == 0) {
adapter->id = *id;
adapter->isc = isc;
adapter->type = type;
QTAILQ_INSERT_TAIL(&channel_subsys->io_adapters, adapter, sibling);
} else {
g_free(adapter);
fprintf(stderr, "Unexpected error %d when registering adapter %d\n",
ret, *id);
}
out:
return ret;
}
uint16_t css_build_subchannel_id(SubchDev *sch)
{
if (channel_subsys->max_cssid > 0) {
@ -1235,6 +1284,7 @@ static void css_init(void)
channel_subsys->do_crw_mchk = true;
channel_subsys->crws_lost = false;
channel_subsys->chnmon_active = false;
QTAILQ_INIT(&channel_subsys->io_adapters);
}
machine_init(css_init);