mei: enable async event notifications only from hbm version 2.0
Only FW version 2.0 and newer support the async event
notification. For backward compatibility block the feature
if the FW version is older then 2.0
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index e39cfe6..4b469cf 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -158,6 +158,8 @@
dev->hbm_f_dc_supported);
pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n",
dev->hbm_f_dot_supported);
+ pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
+ dev->hbm_f_ev_supported);
}
pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 8a73fa0..95e918c 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -903,6 +903,10 @@
/* disconnect on connect timeout instead of link reset */
if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT)
dev->hbm_f_dot_supported = 1;
+
+ /* Notification Event Support */
+ if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
+ dev->hbm_f_ev_supported = 1;
}
/**
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index a2c7aab..3f8901a 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -58,6 +58,12 @@
#define HBM_MINOR_VERSION_DOT 0
#define HBM_MAJOR_VERSION_DOT 2
+/*
+ * MEI version with notifcation support
+ */
+#define HBM_MINOR_VERSION_EV 0
+#define HBM_MAJOR_VERSION_EV 2
+
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 362ebb1..e22bd21 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -419,6 +419,7 @@
* @hbm_f_pg_supported : hbm feature pgi protocol
* @hbm_f_dc_supported : hbm feature dynamic clients
* @hbm_f_dot_supported : hbm feature disconnect on timeout
+ * @hbm_f_ev_supported : hbm feature event notification
*
* @me_clients_rwsem: rw lock over me_clients list
* @me_clients : list of FW clients
@@ -514,6 +515,7 @@
unsigned int hbm_f_pg_supported:1;
unsigned int hbm_f_dc_supported:1;
unsigned int hbm_f_dot_supported:1;
+ unsigned int hbm_f_ev_supported:1;
struct rw_semaphore me_clients_rwsem;
struct list_head me_clients;