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: No change. v7: Collected the Rb-ed by. Rebasing. v8: Adjust to the new mei interface. Fix for Kdoc. Signed-off-by: Ramalingam C <ramalinga...@intel.com> Reviewed-by: Uma Shankar <uma.shan...@intel.com> --- drivers/misc/mei/hdcp/mei_hdcp.c | 60 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index b38836dbdb66..f5e6db9c0026 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -164,12 +164,70 @@ mei_verify_receiver_cert_prepare_km(struct device *dev, void *hdcp_data, return 0; } +/* + * mei_verify_hprime : + * Function to verify AKE_Send_H_prime received, through 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 mei verification + * + * Returns 0 on Success, <0 on Failure + */ +static int mei_verify_hprime(struct device *dev, void *hdcp_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; + struct mei_hdcp_data *data = hdcp_data; + 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 = data->port; + + memcpy(send_hprime_in.h_prime, rx_hprime->h_prime, + sizeof(rx_hprime->h_prime)); + + 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_initiate_hdcp2_session, .verify_receiver_cert_prepare_km = mei_verify_receiver_cert_prepare_km, - .verify_hprime = NULL, + .verify_hprime = mei_verify_hprime, .store_pairing_info = NULL, .initiate_locality_check = NULL, .verify_lprime = NULL, -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx