Fiber channel endpoint security event is received as an sei:nt0 type
in the cio-chsc layer. this information needs to be shared with the
ccwdev devices (dasd for instance) using path_events. Send this
information to the sch layer which will internally use the path-event
for this notification.
Reference-ID: IO1812
Signed-off-by: Vineeth Vijayan <vneethv@xxxxxxxxxxxxx>
---
arch/s390/include/asm/ccwdev.h | 1 +
drivers/s390/cio/chp.h | 1 +
drivers/s390/cio/chsc.c | 50 ++++++++++++++++++++++++++++++----
drivers/s390/cio/device.c | 19 ++++++++++++-
4 files changed, 65 insertions(+), 6 deletions(-)
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index 865ce1cb86d5..3662bb27bd01 100644
--- a/arch/s390/include/asm/ccwdev.h
+++ b/arch/s390/include/asm/ccwdev.h
@@ -103,6 +103,7 @@ struct ccw_device {
was successfully verified. */
#define PE_PATHGROUP_ESTABLISHED 0x4 /* A pathgroup was reset and had
to be established again. */
+#define PE_PATH_FCES_EVENT 0x8 /* An event from FCES */
/*
* Possible CIO actions triggered by the unit check handler.
diff --git a/drivers/s390/cio/chp.h b/drivers/s390/cio/chp.h
index 20259f3fbf45..7ee9eba0abcb 100644
--- a/drivers/s390/cio/chp.h
+++ b/drivers/s390/cio/chp.h
@@ -23,6 +23,7 @@
#define CHP_OFFLINE 1
#define CHP_VARY_ON 2
#define CHP_VARY_OFF 3
+#define CHP_FCES_EVENT 4
struct chp_link {
struct chp_id chpid;
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 6218bcb8d21f..c7371b5241a2 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -37,6 +37,10 @@ static void *sei_page;
static void *chsc_page;
static DEFINE_SPINLOCK(chsc_page_lock);
+/* Store Event Information VF field definitions*/
+#define SEI_VF_FLA 0xc0 /* Full Link Address*/
+#define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID*/
+
/**
* chsc_error_from_response() - convert a chsc response to an error
* @response: chsc response code
@@ -283,6 +287,29 @@ static void s390_process_res_acc(struct chp_link *link)
css_schedule_reprobe();
}
+static int __s390_process_fces_event(struct subchannel *sch, void *data)
+{
+ spin_lock_irq(sch->lock);
+ if (sch->driver && sch->driver->chp_event)
+ sch->driver->chp_event(sch, data, CHP_FCES_EVENT);
+ spin_unlock_irq(sch->lock);
+ fces_event = 0;
+ return 0;
+}
+
+
+static void s390_process_fces_event(struct chp_link *link)
+{
+ /* Wait until previous actions have settled. */
+ css_wait_for_slow_path();
+ /*
+ * Scan through all subchannels that may be concerned and
+ * do a validation on those.
+ */
+ for_each_subchannel_staged(__s390_process_fces_event, NULL, link);
+}
+
+
struct chsc_sei_nt0_area {
u8 flags;
u8 vf; /* validity flags */
@@ -569,13 +596,15 @@ static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area)
static void chsc_process_sei_esc_change(struct chsc_sei_nt0_area *sei_area)
{
struct channel_path *chp;
+ struct chp_link link;
struct chp_id chpid;
int status;
- CIO_CRW_EVENT(4, "chsc: endpoint security status notification (rs=%02x, "
- "rs_id=%04x, esc=%x)\n", sei_area->rs, sei_area->rsid,
- sei_area->ccdf[0]);
- if (sei_area->rs != 4)
+ CIO_CRW_EVENT(4, "chsc: endpoint security status notification (rs=%02x "
+ " rs_id=%04x, esc=%x)\n", sei_area->rs, sei_area->rsid,
+ sei_area->ccdf[0]);
+
+ if (sei_area->rs != SEI_RS_CHPID)
return;
chp_id_init(&chpid);
chpid.id = sei_area->rsid;
@@ -593,7 +622,18 @@ static void chsc_process_sei_esc_change(struct chsc_sei_nt0_area *sei_area)
mutex_unlock(&chp->lock);
}
- /* notify driver? check I/O? */
+ memset(&link, 0, sizeof(struct chp_link));
+ link.chpid = chpid;
+ if ((sei_area->vf & SEI_VF_FLA) != 0) {
+ link.fla = sei_area->fla;
+ if ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA)
+ /* full link address */
+ link.fla_mask = 0xffff;
+ else
+ /* link address */
+ link.fla_mask = 0xff00;
+ }
+ s390_process_fces_event(&link);
}
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 0c6245fc7706..518794a7fab5 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1165,7 +1165,8 @@ static int io_subchannel_chp_event(struct subchannel *sch,
struct chp_link *link, int event)
{
struct ccw_device *cdev = sch_get_cdev(sch);
- int mask;
+ int mask, chpid, maskval;
+ int path_event[8];
mask = chp_ssd_get_mask(&sch->ssd_info, link);
if (!mask)
@@ -1200,6 +1201,22 @@ static int io_subchannel_chp_event(struct subchannel *sch,
cdev->private->path_new_mask |= mask;
io_subchannel_verify(sch);
break;
+ case CHP_FCES_EVENT:
+ /* call the path_event functionality and let the
+ * consumer device know about the end-point security
+ * event
+ */
+ for (chpid = 0, maskval = 0x80; chpid < 8; chpid++,
+ maskval >>= 1) {
+ path_event[chpid] = PE_NONE;
+ if (mask == maskval)
+ path_event[chpid] = PE_PATH_FCES_EVENT;
+ }
+ spin_lock_irq(cdev->ccwlock);
+ if (cdev)
+ cdev->drv->path_event(cdev, path_event);
+ spin_unlock_irq(cdev->ccwlock);
+ break;
}
return 0;
}
--
2.17.1
