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mei: send OS type to the FW

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Tell the FW that we are running a sane OS and TPM2_ChangeEPS()
is supported. This workaround was added to support other broken OS
and we need to follow here. The command is sent just once at the boot time.

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:
Alexander Usyskin 2016-11-10 18:38:57 +02:00 committed by Greg Kroah-Hartman
parent fcd35857d6
commit 7279b238ba
1 changed files with 95 additions and 0 deletions
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95
drivers/misc/mei/bus-fixup.c
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@ -38,6 +38,9 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
#define MEI_UUID_ANY NULL_UUID_LE
/**
@ -69,6 +72,97 @@ static void blacklist(struct mei_cl_device *cldev)
cldev->do_match = 0;
}
#define OSTYPE_LINUX 2
struct mei_os_ver {
__le16 build;
__le16 reserved1;
u8 os_type;
u8 major;
u8 minor;
u8 reserved2;
} __packed;
#define MKHI_FEATURE_PTT 0x10
struct mkhi_rule_id {
__le16 rule_type;
u8 feature_id;
u8 reserved;
} __packed;
struct mkhi_fwcaps {
struct mkhi_rule_id id;
u8 len;
u8 data[0];
} __packed;
#define MKHI_FWCAPS_GROUP_ID 0x3
#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
struct mkhi_msg_hdr {
u8 group_id;
u8 command;
u8 reserved;
u8 result;
} __packed;
struct mkhi_msg {
struct mkhi_msg_hdr hdr;
u8 data[0];
} __packed;
static int mei_osver(struct mei_cl_device *cldev)
{
int ret;
const size_t size = sizeof(struct mkhi_msg_hdr) +
sizeof(struct mkhi_fwcaps) +
sizeof(struct mei_os_ver);
size_t length = 8;
char buf[size];
struct mkhi_msg *req;
struct mkhi_fwcaps *fwcaps;
struct mei_os_ver *os_ver;
unsigned int mode = MEI_CL_IO_TX_BLOCKING | MEI_CL_IO_TX_INTERNAL;
memset(buf, 0, size);
req = (struct mkhi_msg *)buf;
req->hdr.group_id = MKHI_FWCAPS_GROUP_ID;
req->hdr.command = MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD;
fwcaps = (struct mkhi_fwcaps *)req->data;
fwcaps->id.rule_type = 0x0;
fwcaps->id.feature_id = MKHI_FEATURE_PTT;
fwcaps->len = sizeof(*os_ver);
os_ver = (struct mei_os_ver *)fwcaps->data;
os_ver->os_type = OSTYPE_LINUX;
ret = __mei_cl_send(cldev->cl, buf, size, mode);
if (ret < 0)
return ret;
ret = __mei_cl_recv(cldev->cl, buf, length);
if (ret < 0)
return ret;
return 0;
}
static void mei_mkhi_fix(struct mei_cl_device *cldev)
{
int ret;
ret = mei_cldev_enable(cldev);
if (ret)
return;
ret = mei_osver(cldev);
if (ret)
dev_err(&cldev->dev, "OS version command failed %d\n", ret);
mei_cldev_disable(cldev);
}
/**
* mei_wd - wd client on the bus, change protocol version
* as the API has changed.
@ -310,6 +404,7 @@ static struct mei_fixup {
MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
MEI_FIXUP(MEI_UUID_WD, mei_wd),
MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
};
/**