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path: root/drivers/s390/cio/vfio_ccw_fsm.c
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Diffstat (limited to 'drivers/s390/cio/vfio_ccw_fsm.c')
-rw-r--r--drivers/s390/cio/vfio_ccw_fsm.c51
1 files changed, 50 insertions, 1 deletions
diff --git a/drivers/s390/cio/vfio_ccw_fsm.c b/drivers/s390/cio/vfio_ccw_fsm.c
index 49d9d3da0282..4a1e727c62d9 100644
--- a/drivers/s390/cio/vfio_ccw_fsm.c
+++ b/drivers/s390/cio/vfio_ccw_fsm.c
@@ -37,9 +37,14 @@ static int fsm_io_helper(struct vfio_ccw_private *private)
goto out;
}
+ VFIO_CCW_TRACE_EVENT(5, "stIO");
+ VFIO_CCW_TRACE_EVENT(5, dev_name(&sch->dev));
+
/* Issue "Start Subchannel" */
ccode = ssch(sch->schid, orb);
+ VFIO_CCW_HEX_EVENT(5, &ccode, sizeof(ccode));
+
switch (ccode) {
case 0:
/*
@@ -86,9 +91,14 @@ static int fsm_do_halt(struct vfio_ccw_private *private)
spin_lock_irqsave(sch->lock, flags);
+ VFIO_CCW_TRACE_EVENT(2, "haltIO");
+ VFIO_CCW_TRACE_EVENT(2, dev_name(&sch->dev));
+
/* Issue "Halt Subchannel" */
ccode = hsch(sch->schid);
+ VFIO_CCW_HEX_EVENT(2, &ccode, sizeof(ccode));
+
switch (ccode) {
case 0:
/*
@@ -122,9 +132,14 @@ static int fsm_do_clear(struct vfio_ccw_private *private)
spin_lock_irqsave(sch->lock, flags);
+ VFIO_CCW_TRACE_EVENT(2, "clearIO");
+ VFIO_CCW_TRACE_EVENT(2, dev_name(&sch->dev));
+
/* Issue "Clear Subchannel" */
ccode = csch(sch->schid);
+ VFIO_CCW_HEX_EVENT(2, &ccode, sizeof(ccode));
+
switch (ccode) {
case 0:
/*
@@ -149,6 +164,9 @@ static void fsm_notoper(struct vfio_ccw_private *private,
{
struct subchannel *sch = private->sch;
+ VFIO_CCW_TRACE_EVENT(2, "notoper");
+ VFIO_CCW_TRACE_EVENT(2, dev_name(&sch->dev));
+
/*
* TODO:
* Probably we should send the machine check to the guest.
@@ -229,6 +247,7 @@ static void fsm_io_request(struct vfio_ccw_private *private,
struct ccw_io_region *io_region = private->io_region;
struct mdev_device *mdev = private->mdev;
char *errstr = "request";
+ struct subchannel_id schid = get_schid(private);
private->state = VFIO_CCW_STATE_CP_PROCESSING;
memcpy(scsw, io_region->scsw_area, sizeof(*scsw));
@@ -239,18 +258,32 @@ static void fsm_io_request(struct vfio_ccw_private *private,
/* Don't try to build a cp if transport mode is specified. */
if (orb->tm.b) {
io_region->ret_code = -EOPNOTSUPP;
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): transport mode\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no);
errstr = "transport mode";
goto err_out;
}
io_region->ret_code = cp_init(&private->cp, mdev_dev(mdev),
orb);
if (io_region->ret_code) {
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): cp_init=%d\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no,
+ io_region->ret_code);
errstr = "cp init";
goto err_out;
}
io_region->ret_code = cp_prefetch(&private->cp);
if (io_region->ret_code) {
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): cp_prefetch=%d\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no,
+ io_region->ret_code);
errstr = "cp prefetch";
cp_free(&private->cp);
goto err_out;
@@ -259,23 +292,36 @@ static void fsm_io_request(struct vfio_ccw_private *private,
/* Start channel program and wait for I/O interrupt. */
io_region->ret_code = fsm_io_helper(private);
if (io_region->ret_code) {
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): fsm_io_helper=%d\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no,
+ io_region->ret_code);
errstr = "cp fsm_io_helper";
cp_free(&private->cp);
goto err_out;
}
return;
} else if (scsw->cmd.fctl & SCSW_FCTL_HALT_FUNC) {
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): halt on io_region\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no);
/* halt is handled via the async cmd region */
io_region->ret_code = -EOPNOTSUPP;
goto err_out;
} else if (scsw->cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
+ VFIO_CCW_MSG_EVENT(2,
+ "%pUl (%x.%x.%04x): clear on io_region\n",
+ mdev_uuid(mdev), schid.cssid,
+ schid.ssid, schid.sch_no);
/* clear is handled via the async cmd region */
io_region->ret_code = -EOPNOTSUPP;
goto err_out;
}
err_out:
- trace_vfio_ccw_io_fctl(scsw->cmd.fctl, get_schid(private),
+ trace_vfio_ccw_io_fctl(scsw->cmd.fctl, schid,
io_region->ret_code, errstr);
}
@@ -308,6 +354,9 @@ static void fsm_irq(struct vfio_ccw_private *private,
{
struct irb *irb = this_cpu_ptr(&cio_irb);
+ VFIO_CCW_TRACE_EVENT(6, "IRQ");
+ VFIO_CCW_TRACE_EVENT(6, dev_name(&private->sch->dev));
+
memcpy(&private->irb, irb, sizeof(*irb));
queue_work(vfio_ccw_work_q, &private->io_work);