On Wednesday 09 May 2018 04:29 PM, Shankar, Uma wrote:
-----Original Message-----
From: Intel-gfx [mailto:intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
Ramalingam C
Sent: Tuesday, April 3, 2018 7:27 PM
To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
seanpaul@xxxxxxxxxxxx; daniel@xxxxxxxx; chris@xxxxxxxxxxxxxxxxxx;
jani.nikula@xxxxxxxxxxxxxxx; Winkler, Tomas <tomas.winkler@xxxxxxxxx>;
Usyskin, Alexander <alexander.usyskin@xxxxxxxxx>
Cc: Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>
Subject: [Intel-gfx] [PATCH v3 14/40] misc/mei/hdcp: Prepare Session Key
Request to ME to prepare the encrypted session key.
On Success, ME provides Encrypted session key. Functions populates the HDCP2.2
Drop "s" from function.
ok. Thanks.
authentication msg SKE_Send_Eks.
v2:
Rebased.
v3:
cldev is passed as first parameter [Tomas]
Redundant comments and cast are removed [Tomas]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 58
++++++++++++++++++++++++++++++++++++++++
include/linux/mei_hdcp.h | 8 ++++++
2 files changed, 66 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
b/drivers/misc/mei/hdcp/mei_hdcp.c
index ea84177311b7..abfcc57863b8 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -420,6 +420,64 @@ int mei_verify_lprime(struct mei_cl_device *cldev,
struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_lprime);
+/**
+ * mei_get_session_key:
+ * Function to prepare SKE_Send_Eks.
+ *
+ * @cldev : Pointer for mei client device
+ * @data : Intel HW specific Data
+ * @ske_data : Pointer for SKE_Send_Eks.
+ *
+ * Returns 0 on Success, <0 on Failure
+ */
+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data
*data,
+ struct hdcp2_ske_send_eks *ske_data) {
+ struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
+ struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
+ struct device *dev;
+ ssize_t byte;
+
+ if (!data || !ske_data)
+ return -EINVAL;
+
+ dev = &cldev->dev;
+
+ get_skey_in.header.api_version = HDCP_API_VERSION;
+ get_skey_in.header.command_id = WIRED_GET_SESSION_KEY;
+ get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS;
+ get_skey_in.header.buffer_len =
WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN;
+
+ get_skey_in.port.integrated_port_type = data->port_type;
+ get_skey_in.port.physical_port = data->port;
+
+ byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte);
+ return byte;
+ }
+
+ byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out,
+sizeof(get_skey_out));
+
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte);
+ return byte;
+ }
+
+ if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+ dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
+ WIRED_GET_SESSION_KEY,
get_skey_out.header.status);
+ return -1;
+ }
+
+ ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
+ memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
Check for validity of ske_data->e_dkey_ks.
+ HDCP_2_2_E_DKEY_KS_LEN);
+ memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
Again check for ske_data->riv. Also leave a blank line here.
New line will be added
--Ram
+ return 0;
+}
+EXPORT_SYMBOL(mei_get_session_key);
+
void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) {
if (enabled)
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index
792143563c46..534170d746af 100644
--- a/include/linux/mei_hdcp.h
+++ b/include/linux/mei_hdcp.h
@@ -126,6 +126,8 @@ int mei_initiate_locality_check(struct mei_cl_device
*cldev,
struct hdcp2_lc_init *lc_init_data); int
mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data,
struct hdcp2_lc_send_lprime *rx_lprime);
+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data
*data,
+ struct hdcp2_ske_send_eks *ske_data);
#else
static int mei_cldev_register_notify(struct notifier_block *nb) { @@ -178,5
+180,11 @@ int mei_verify_lprime(struct mei_cl_device *cldev, struct
mei_hdcp_data *data, {
return -ENODEV;
}
+static inline
+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data
*data,
+ struct hdcp2_ske_send_eks *ske_data) {
+ return -ENODEV;
+}
#endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined
(_LINUX_MEI_HDCP_H) */
--
2.7.4
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