Requests for the verification of AKE_Send_H_prime.
ME will calculate the H and comparing it with received H_Prime. The result will be returned as status.
Here AKE_Send_H_prime is a HDCP2.2 Authentication msg.
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] Styles and typos 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] memcpy for const length. 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 | 58 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 4e471657c6f0..0bbc6992631a 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -177,13 +177,69 @@ mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev, return 0; }
+/**
- mei_hdcp_verify_hprime() - Verify AKE_Send_H_prime at ME FW.
- @dev: device corresponding to the mei_cl_device
- @hdcp_data: Intel HW specific hdcp data
- @rx_hprime: AKE_Send_H_prime msg for ME FW verification
- Return: 0 on Success, <0 on Failure
- */
+static int +mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
struct hdcp2_ake_send_hprime *rx_hprime) {- struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } };
- struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } };
- struct mei_cl_device *cldev;
- ssize_t byte;
- if (!dev || !data || !rx_hprime)
return -EINVAL;- cldev = to_mei_cl_device(dev);
- send_hprime_in.header.api_version = HDCP_API_VERSION;
- send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME;
- send_hprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
- send_hprime_in.header.buffer_len =
+WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN;
- send_hprime_in.port.integrated_port_type = data->port_type;
- send_hprime_in.port.physical_port = mei_get_ddi_index(data->port);
- memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
HDCP_2_2_H_PRIME_LEN);- byte = mei_cldev_send(cldev, (u8 *)&send_hprime_in,
sizeof(send_hprime_in));- if (byte < 0) {
dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);return byte;- }
- byte = mei_cldev_recv(cldev, (u8 *)&send_hprime_out,
sizeof(send_hprime_out));- if (byte < 0) {
dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);return byte;- }
- if (send_hprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",WIRED_AKE_SEND_HPRIME,send_hprime_out.header.status);
return -EIO;- }
- return 0;
+}
static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, .initiate_hdcp2_session = mei_hdcp_initiate_session, .verify_receiver_cert_prepare_km = mei_hdcp_verify_receiver_cert_prepare_km,
- .verify_hprime = NULL,
- .verify_hprime = mei_hdcp_verify_hprime, .store_pairing_info = NULL, .initiate_locality_check = NULL, .verify_lprime = NULL,
-- 2.7.4