-----Original Message----- From: C, Ramalingam Sent: Saturday, July 14, 2018 8:45 AM To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; daniel@ffwll.ch; seanpaul@chromium.org; Winkler, Tomas tomas.winkler@intel.com; Usyskin, Alexander alexander.usyskin@intel.com; Shankar, Uma uma.shankar@intel.com Cc: Sharma, Shashank shashank.sharma@intel.com; C, Ramalingam ramalingam.c@intel.com Subject: [PATCH v6 31/35] misc/mei/hdcp: Prepare Session Key
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: No change.
Looks ok to me. Reviewed-by: Uma Shankar uma.shankar@intel.com
Signed-off-by: Ramalingam C ramalingam.c@intel.com
drivers/misc/mei/hdcp/mei_hdcp.c | 62 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index c2d6d815354c..eb35e22fdeff 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -423,6 +423,65 @@ static int mei_verify_lprime(struct mei_cl_device *cldev, return 0; }
+/*
- 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
- */
+static 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. %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;
+}
struct i915_hdcp_component_ops mei_hdcp_component_ops = { .owner = THIS_MODULE, .initiate_hdcp2_session = mei_initiate_hdcp2_session, @@ -432,7 +491,7 @@ struct i915_hdcp_component_ops mei_hdcp_component_ops = { .store_pairing_info = mei_store_pairing_info, .initiate_locality_check = mei_initiate_locality_check, .verify_lprime = mei_verify_lprime,
- .get_session_key = NULL,
- .get_session_key = mei_get_session_key, .repeater_check_flow_prepare_ack = NULL, .verify_mprime = NULL, .enable_hdcp_authentication = NULL,
@@ -441,7 +500,6 @@ struct i915_hdcp_component_ops mei_hdcp_component_ops = {
static int mei_hdcp_component_bind(struct device *mei_kdev, struct device *i915_kdev, void *data)
{ struct i915_component_master *comp = data;
-- 2.7.4