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/* SPDX-License-Identifier: (GPL-2.0+) */
/*
* Copyright © 2017-2018 Intel Corporation
*
* Authors:
* Ramalingam C <ramalingam.c@intel.com>
*/
#ifndef _I915_MEI_HDCP_INTERFACE_H_
#define _I915_MEI_HDCP_INTERFACE_H_
#include <linux/mutex.h>
#include <linux/device.h>
#include <drm/drm_hdcp.h>
#include <drm/i915_drm.h>
/**
* enum hdcp_port_type - HDCP port implementation type defined by ME FW
* @HDCP_PORT_TYPE_INVALID: Invalid hdcp port type
* @HDCP_PORT_TYPE_INTEGRATED: In-Host HDCP2.x port
* @HDCP_PORT_TYPE_LSPCON: HDCP2.2 discrete wired Tx port with LSPCON
* (HDMI 2.0) solution
* @HDCP_PORT_TYPE_CPDP: HDCP2.2 discrete wired Tx port using the CPDP (DP 1.3)
* solution
*/
enum hdcp_port_type {
HDCP_PORT_TYPE_INVALID,
HDCP_PORT_TYPE_INTEGRATED,
HDCP_PORT_TYPE_LSPCON,
HDCP_PORT_TYPE_CPDP
};
/**
* enum hdcp_wired_protocol - HDCP adaptation used on the port
* @HDCP_PROTOCOL_INVALID: Invalid HDCP adaptation protocol
* @HDCP_PROTOCOL_HDMI: HDMI adaptation of HDCP used on the port
* @HDCP_PROTOCOL_DP: DP adaptation of HDCP used on the port
*/
enum hdcp_wired_protocol {
HDCP_PROTOCOL_INVALID,
HDCP_PROTOCOL_HDMI,
HDCP_PROTOCOL_DP
};
/**
* struct hdcp_port_data - intel specific HDCP port data
* @port: port index as per I915
* @port_type: HDCP port type as per ME FW classification
* @protocol: HDCP adaptation as per ME FW
* @k: No of streams transmitted on a port. Only on DP MST this is != 1
* @seq_num_m: Count of RepeaterAuth_Stream_Manage msg propagated.
* Initialized to 0 on AKE_INIT. Incremented after every successful
* transmission of RepeaterAuth_Stream_Manage message. When it rolls
* over re-Auth has to be triggered.
* @streams: struct hdcp2_streamid_type[k]. Defines the type and id for the
* streams
*/
struct hdcp_port_data {
enum port port;
u8 port_type;
u8 protocol;
u16 k;
u32 seq_num_m;
struct hdcp2_streamid_type *streams;
};
/**
* struct i915_hdcp_component_ops- ops for HDCP2.2 services.
* @owner: Module providing the ops
* @initiate_hdcp2_session: Initiate a Wired HDCP2.2 Tx Session.
* And Prepare AKE_Init.
* @verify_receiver_cert_prepare_km: Verify the Receiver Certificate
* AKE_Send_Cert and prepare
AKE_Stored_Km/AKE_No_Stored_Km
* @verify_hprime: Verify AKE_Send_H_prime
* @store_pairing_info: Store pairing info received
* @initiate_locality_check: Prepare LC_Init
* @verify_lprime: Verify lprime
* @get_session_key: Prepare SKE_Send_Eks
* @repeater_check_flow_prepare_ack: Validate the Downstream topology
* and prepare rep_ack
* @verify_mprime: Verify mprime
* @enable_hdcp_authentication: Mark a port as authenticated.
* @close_hdcp_session: Close the Wired HDCP Tx session per port.
* This also disables the authenticated state of the port.
*/
struct i915_hdcp_component_ops {
/**
* @owner: mei_hdcp module
*/
struct module *owner;
int (*initiate_hdcp2_session)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_ake_init *ake_data);
int (*verify_receiver_cert_prepare_km)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_ake_send_cert
*rx_cert,
bool *km_stored,
struct hdcp2_ake_no_stored_km
*ek_pub_km,
size_t *msg_sz);
int (*verify_hprime)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_ake_send_hprime *rx_hprime);
int (*store_pairing_info)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_ake_send_pairing_info
*pairing_info);
int (*initiate_locality_check)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_lc_init *lc_init_data);
int (*verify_lprime)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_lc_send_lprime *rx_lprime);
int (*get_session_key)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_ske_send_eks *ske_data);
int (*repeater_check_flow_prepare_ack)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_rep_send_receiverid_list
*rep_topology,
struct hdcp2_rep_send_ack
*rep_send_ack);
int (*verify_mprime)(struct device *dev,
struct hdcp_port_data *data,
struct hdcp2_rep_stream_ready *stream_ready);
int (*enable_hdcp_authentication)(struct device *dev,
struct hdcp_port_data *data);
int (*close_hdcp_session)(struct device *dev,
struct hdcp_port_data *data);
};
/**
* struct i915_hdcp_component_master - Used for communication between i915
* and mei_hdcp drivers for the HDCP2.2 services
* @mei_dev: device that provide the HDCP2.2 service from MEI Bus.
* @hdcp_ops: Ops implemented by mei_hdcp driver, used by i915 driver.
*/
struct i915_hdcp_comp_master {
struct device *mei_dev;
const struct i915_hdcp_component_ops *ops;
/* To protect the above members. */
struct mutex mutex;
};
#endif /* _I915_MEI_HDCP_INTERFACE_H_ */
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