DRM HDCP2.2 service function interface is defiend. This will be initialized from display driver.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- include/drm/drm_hdcp.h | 207 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+)
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 1f9a04d..94acd8d 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -30,6 +30,18 @@ struct drm_connector; struct drm_hdcp;
+struct wired_ake_init; +struct wired_ake_send_cert; +struct wired_ake_no_stored_km; +struct wired_ake_send_hprime; +struct wired_ake_send_pairing_info; +struct wired_lc_init; +struct wired_lc_send_lprime; +struct wired_ske_send_eks; +struct wired_rep_send_receiverid_list; +struct wired_rep_send_ack; +struct wired_rep_stream_ready; + /** * HDCP Software stack specific */ @@ -71,6 +83,200 @@ enum wired_protocol { WIRED_PROTOCOL_DP };
+struct drm_hdcp2_funcs { + + /* Authencation and Key Exchange related */ + /** + * @prepare_ake_init: + * + * Function to prepare the complete ake_init message and + * pass it onto DRM. + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*prepare_ake_init)(struct drm_hdcp *hdcp, + struct wired_ake_init *ake_data, size_t buf_sz, + size_t *msg_sz); + + /** + * @verify_rx_cert: + * + * Service Function for verifying the DCP signature of rx + * certificate received from HDCP sink and prepare the msg with km as + * AKE_No_Stored_km or AKE_Stored_km. + * + * Involves: + * DCP signature verification. + * Receiver ID check against the SRM table's revocation list. + * For Non-Paired receiver + * Generate a pseudo-random 128-bit Master Key Km + * Encrypt km with kpub_rx + * Form AKE_No_Stored_km msg + * For Paired Device + * Forms AKE_Stored_km with stored Ekh(km) and m + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*verify_rx_cert_prepare_km)(struct drm_hdcp *hdcp, + struct wired_ake_send_cert *rx_cert, + size_t rx_cert_sz, bool *paired, + struct wired_ake_no_stored_km *ek_pub_km, + size_t buf_sz, size_t *msg_sz); + + /** + * @verify_hprime: + * + * Service Function for verifying the hprime received from receiver. + * Involves: + * Prepare hprime and compare with received hprime + * hprime = HMAC_SHA256(r_tx || RxCaps || TxCaps, kd) + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*verify_hprime)(struct drm_hdcp *hdcp, + struct wired_ake_send_hprime *rx_hprime, + size_t hprime_sz); + + /** + * @store_paring_info: + * + * Service Function to store the Ekh(km) along with m in + * non-volatile memory. This is just to fast track the authentication + * of same receiver from next time onwards. + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*store_paring_info)(struct drm_hdcp *hdcp, + struct wired_ake_send_pairing_info *pairing_info, + size_t pairing_info_sz); + + /* Locality check related services */ + /** + * @prepare_lc_init: + * + * Service Function to prepare LC_INIT + * Involves: + * Generation of 64bit pseudo aandom nonce rn + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*prepare_lc_init)(struct drm_hdcp *hdcp, + struct wired_lc_init *lc_init_data, size_t buf_sz, + size_t *msg_sz); + + /** + * @verify_lprime: + * + * Service Function to verify the lprime received from receiver + * Involves + * Calculate L = HMAC-SHA256(rn, kd XOR rrx) + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*verify_lprime)(struct drm_hdcp *hdcp, + struct wired_lc_send_lprime *rx_lprime, + size_t lprime_sz); + + /* SKE related services */ + /** + * @prepare_skey: + * + * Service Function to prepare SKE_Send_Eks msg + * Involves + * Generation of Edkey(ks) and riv + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*prepare_skey)(struct drm_hdcp *hdcp, + struct wired_ske_send_eks *ske_data, + size_t buf_sz, size_t *msg_sz); + + /* Repeater Support services */ + /** + * @verify_rep_topology: + * + * Service Function to validate the downstream topology and to prepare + * repeater_auth_ack message. + * Involves + * Validate the devcie count and Depth + * Look out for HDCP1.x devices or HDCP2.0 devices + * Check receiver ID list against revocation list + * Check for roll over of seq_num_V + * validate the vprime with Most Significant 128bits of V + * V’ = HMAC-SHA256(ReceiverID list || RxInfo || seq_num_V, kd) + * Least Significant 128bits of V is formed as ack msg. + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*verify_rep_topology_prepare_ack)( + struct drm_hdcp *hdcp, + struct wired_rep_send_receiverid_list *rep_topology, + size_t receiverid_list_sz, + struct wired_rep_send_ack *rep_send_ack, size_t buf_sz, + size_t *msg_sz); + + /** + * @verify_mprime: + * + * Service Function to verify the MPrime received + * M’(or M) = HMAC-SHA256(StreamID_Type || seq_num_M, SHA256(kd)) + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*verify_mprime)(struct drm_hdcp *hdcp, + struct wired_rep_stream_ready *stream_ready, + size_t stream_ready_sz); + + /** + * @authenticate: + * + * Service Function to configure HW as Authenticated + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*authenticate)(struct drm_hdcp *hdcp); + + /** + * @deauthenticate: + * + * Service Function to configure HW as deauthenticated + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*deauthenticate)(struct drm_hdcp *hdcp); + + /** + * @enable_encryption: + * + * Service Function to enable encryption at platform level. + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*enable_encryption)(struct drm_hdcp *hdcp); + + /** + * @disable_encryption: + * + * Service function to disable encryption at platform level. + * + * returns HDCP_STATUS_SUCCESS on success + * else non-zero HDCP error states + **/ + enum hdcp_status (*disable_encryption)(struct drm_hdcp *hdcp); +}; + struct drm_hdcp_funcs {
/** @@ -125,6 +331,7 @@ struct drm_hdcp { enum wired_protocol protocol;
const struct drm_hdcp_funcs *hdcp_funcs; + const struct drm_hdcp2_funcs *hdcp2_funcs;
struct mutex mutex; };