[char-misc-next v2 5/7] mei: bus: whitelist the watchdog client

Tomas Winkler
2015-12-17T14:52:06Z

The iAMT WD client has to be whitelisted sice it has two connections
and is filtered out by number_of_connections fixup.
Also the API has changed for BDW and SKL but firmware haven't updated
the protocol version.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
V2: resend
drivers/misc/mei/bus-fixup.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index b2d2a6ea576c..b87323f4bb14 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -35,6 +35,9 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)

+#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
+ 0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
+
#define MEI_UUID_ANY NULL_UUID_LE

/**
@@ -66,6 +69,31 @@ static void blacklist(struct mei_cl_device *cldev)
cldev->do_match = 0;
}

+/**
+ * mei_wd - wd client on the bus, change protocol version
+ * as the API has changed.
+ *
+ * @cldev: me clients device
+ */
+#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
+#include <linux/pci.h>
+#include "hw-me-regs.h"
+static void mei_wd(struct mei_cl_device *cldev)
+{
+ struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
+
+ dev_dbg(&cldev->dev, "running hook %s\n", __func__);
+ if (pdev->device == MEI_DEV_ID_WPT_LP ||
+ pdev->device == MEI_DEV_ID_SPT ||
+ pdev->device == MEI_DEV_ID_SPT_H)
+ cldev->me_cl->props.protocol_version = 0x2;
+
+ cldev->do_match = 1;
+}
+#else
+static inline void mei_wd(struct mei_cl_device *cldev) {}
+#endif /* CONFIG_INTEL_MEI_ME */
+
struct mei_nfc_cmd {
u8 command;
u8 status;
@@ -280,6 +308,7 @@ static struct mei_fixup {
MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
+ MEI_FIXUP(MEI_UUID_WD, mei_wd),
};

/**
--
2.4.3