Request to ME to prepare the encrypted session key.
On Success, ME provides Encrypted session key. Function populates the HDCP2.2 authentication msg SKE_Send_Eks.
v2: Rebased. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] v4: %zd for ssize_t [Alexander] %s/return -1/return -EIO [Alexander] Style fixed [Uma] v5: Rebased. v6: Collected the Rb-ed by. Rebasing. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition. [Tomas] v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com
Ack Thanks Tomas
drivers/misc/mei/hdcp/mei_hdcp.c | 59 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 58 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 814d870347a0..d8665b02d6d5 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -404,6 +404,63 @@ mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data, return 0; }
+/**
- mei_hdcp_get_session_key() - Prepare SKE_Send_Eks.
- @dev: device corresponding to the mei_cl_device
- @hdcp_data: Intel HW specific hdcp data
- @ske_data: SKE_Send_Eks msg output from ME FW.
- Return: 0 on Success, <0 on Failure
- */
+static int mei_hdcp_get_session_key(struct device *dev,
struct hdcp_port_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 mei_cl_device *cldev;
- ssize_t byte;
- if (!dev || !data || !ske_data)
return -EINVAL;- cldev = to_mei_cl_device(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 = mei_get_ddi_index(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. %zd\n", 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. %zd\n", 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 -EIO;- }
- ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
- memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
HDCP_2_2_E_DKEY_KS_LEN);- memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
- return 0;
+}
static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -414,7 +471,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .store_pairing_info = mei_hdcp_store_pairing_info, .initiate_locality_check = mei_hdcp_initiate_locality_check, .verify_lprime = mei_hdcp_verify_lprime,
- .get_session_key = NULL,
- .get_session_key = mei_hdcp_get_session_key, .repeater_check_flow_prepare_ack = NULL, .verify_mprime = NULL, .enable_hdcp_authentication = NULL,
-- 2.7.4