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mei: enable async event notifications only from hbm version 2.0

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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>
This commit is contained in:
Tomas Winkler 2015-07-26 09:54:17 +03:00 committed by Greg Kroah-Hartman
parent 965ae37ab8
commit 4d99877d87
4 changed files with 14 additions and 0 deletions
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2
drivers/misc/mei/debugfs.c
View File

@ -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",

4
drivers/misc/mei/hbm.c
View File

@ -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;
}
/**

6
drivers/misc/mei/hw.h
View File

@ -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 */

2
drivers/misc/mei/mei_dev.h
View File

@ -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;