From: Eric Farman <farman@linux.ibm.com>
To: kvm@vger.kernel.org, linux-s390@vger.kernel.org
Cc: Cornelia Huck <cohuck@redhat.com>,
Jason Herne <jjherne@linux.ibm.com>,
Jared Rossi <jrossi@linux.ibm.com>,
Eric Farman <farman@linux.ibm.com>
Subject: [RFC PATCH v1 02/10] vfio-ccw: Register a chp_event callback for vfio-ccw
Date: Fri, 15 Nov 2019 03:56:12 +0100 [thread overview]
Message-ID: <20191115025620.19593-3-farman@linux.ibm.com> (raw)
In-Reply-To: <20191115025620.19593-1-farman@linux.ibm.com>
From: Farhan Ali <alifm@linux.ibm.com>
Register the chp_event callback to receive channel path related
events for the subchannels managed by vfio-ccw.
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
---
Notes:
v0->v1: [EF]
- Add s390dbf trace
drivers/s390/cio/vfio_ccw_drv.c | 44 +++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 91989269faf1..05da1facee60 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -19,6 +19,7 @@
#include <asm/isc.h>
+#include "chp.h"
#include "ioasm.h"
#include "css.h"
#include "vfio_ccw_private.h"
@@ -257,6 +258,48 @@ static int vfio_ccw_sch_event(struct subchannel *sch, int process)
return rc;
}
+static int vfio_ccw_chp_event(struct subchannel *sch,
+ struct chp_link *link, int event)
+{
+ struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
+ int mask = chp_ssd_get_mask(&sch->ssd_info, link);
+ int retry = 255;
+
+ if (!private || !mask)
+ return 0;
+
+ if (cio_update_schib(sch))
+ return -ENODEV;
+
+ VFIO_CCW_MSG_EVENT(2, "%pUl (%x.%x.%04x): mask=0x%x event=%d\n",
+ mdev_uuid(private->mdev), sch->schid.cssid,
+ sch->schid.ssid, sch->schid.sch_no,
+ mask, event);
+
+ switch (event) {
+ case CHP_VARY_OFF:
+ /* Path logically turned off */
+ sch->opm &= ~mask;
+ sch->lpm &= ~mask;
+ break;
+ case CHP_OFFLINE:
+ /* Path is gone */
+ cio_cancel_halt_clear(sch, &retry);
+ break;
+ case CHP_VARY_ON:
+ /* Path logically turned on */
+ sch->opm |= mask;
+ sch->lpm |= mask;
+ break;
+ case CHP_ONLINE:
+ /* Path became available */
+ sch->lpm |= mask & sch->opm;
+ break;
+ }
+
+ return 0;
+}
+
static struct css_device_id vfio_ccw_sch_ids[] = {
{ .match_flags = 0x1, .type = SUBCHANNEL_TYPE_IO, },
{ /* end of list */ },
@@ -274,6 +317,7 @@ static struct css_driver vfio_ccw_sch_driver = {
.remove = vfio_ccw_sch_remove,
.shutdown = vfio_ccw_sch_shutdown,
.sch_event = vfio_ccw_sch_event,
+ .chp_event = vfio_ccw_chp_event,
};
static int __init vfio_ccw_debug_init(void)
--
2.17.1
next prev parent reply other threads:[~2019-11-15 3:27 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 2:56 [RFC PATCH v1 00/10] s390/vfio-ccw: Channel Path Handling Eric Farman
2019-11-15 2:56 ` [RFC PATCH v1 01/10] vfio-ccw: Introduce new helper functions to free/destroy regions Eric Farman
2019-11-19 12:33 ` Cornelia Huck
2019-11-15 2:56 ` Eric Farman [this message]
2019-11-19 12:48 ` [RFC PATCH v1 02/10] vfio-ccw: Register a chp_event callback for vfio-ccw Cornelia Huck
2019-11-19 15:45 ` Eric Farman
2019-11-15 2:56 ` [RFC PATCH v1 03/10] vfio-ccw: Use subchannel lpm in the orb Eric Farman
2019-11-19 13:00 ` Cornelia Huck
2019-11-19 15:16 ` Eric Farman
2019-11-19 15:38 ` Cornelia Huck
2019-11-19 18:58 ` Eric Farman
2019-11-15 2:56 ` [RFC PATCH v1 04/10] vfio-ccw: Refactor the unregister of the async regions Eric Farman
2019-11-19 16:21 ` Cornelia Huck
2019-11-15 2:56 ` [RFC PATCH v1 05/10] vfio-ccw: Introduce a new schib region Eric Farman
2019-11-19 16:52 ` Cornelia Huck
2019-11-20 16:49 ` Eric Farman
2019-11-15 2:56 ` [RFC PATCH v1 06/10] vfio-ccw: Introduce a new CRW region Eric Farman
2019-11-19 17:17 ` Cornelia Huck
2019-11-15 2:56 ` [RFC PATCH v1 07/10] vfio-ccw: Refactor IRQ handlers Eric Farman
2019-11-19 17:18 ` Cornelia Huck
2019-11-15 2:56 ` [RFC PATCH v1 08/10] vfio-ccw: Wire up the CRW irq and CRW region Eric Farman
2019-11-19 18:52 ` Cornelia Huck
2019-12-05 20:43 ` Eric Farman
2019-12-06 10:21 ` Cornelia Huck
2019-12-06 21:24 ` Eric Farman
2019-12-09 12:38 ` Cornelia Huck
2019-11-15 2:56 ` [RFC PATCH v1 09/10] vfio-ccw: Add trace for CRW event Eric Farman
2019-11-15 2:56 ` [RFC PATCH v1 10/10] vfio-ccw: Remove inline get_schid() routine Eric Farman
2019-11-15 11:15 ` [RFC PATCH v1 00/10] s390/vfio-ccw: Channel Path Handling Cornelia Huck
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