Commit 4d99877d authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

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: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 965ae37a

drivers/misc/mei/debugfs.c

+2 −0
Original line number Diff line number Diff line
@@ -158,6 +158,8 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, 
				 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",

drivers/misc/mei/hbm.c

+4 −0
Original line number Diff line number Diff line
@@ -903,6 +903,10 @@ static void mei_hbm_config_features(struct mei_device *dev) 
	/* 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;

}



/**

drivers/misc/mei/hw.h

+6 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/misc/mei/mei_dev.h

+2 −0
Original line number Diff line number Diff line
@@ -419,6 +419,7 @@ const char *mei_pg_state_str(enum mei_pg_state state); 
 * @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 @@ struct mei_device { 
	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;