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linux/include/drm/i915_hdcp_interface.h
Suraj Kandpal 5c8ec98799 drm/i915/hdcp: Move away from master naming to arbiter 
Rename variables to move away from master convention to
arbiter
%s/hdcp.master/hdcp.arbiter
%s/i915_hdcp_master/i915_hdcp_arbiter
%s/comp_master/comp_arbiter

--v2
- delete i915_hdcp_comp_master redundant declaration [Chaitanya]
- use %s/foo/bar/ format in commit message to show changes [Chaitanya]

--v3
- replace i915_hdcp_comp_master declaration with i915_hdcp_arbiter
to avoid any compile fail with old compilers [Chaitanya]

Cc: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230529110740.1522985-3-suraj.kandpal@intel.com
2023-05-31 10:22:13 +05:30

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/* SPDX-License-Identifier: (GPL-2.0+) */
/*
* Copyright © 2017-2019 Intel Corporation
*
* Authors:
* Ramalingam C <ramalingam.c@intel.com>
*/
#ifndef _I915_HDCP_INTERFACE_H_
#define _I915_HDCP_INTERFACE_H_
#include <linux/mutex.h>
#include <linux/device.h>
#include <drm/display/drm_hdcp.h>
/**
* enum hdcp_port_type - HDCP port implementation type defined by ME/GSC 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
};
enum hdcp_ddi {
HDCP_DDI_INVALID_PORT = 0x0,
HDCP_DDI_B = 1,
HDCP_DDI_C,
HDCP_DDI_D,
HDCP_DDI_E,
HDCP_DDI_F,
HDCP_DDI_A = 7,
HDCP_DDI_RANGE_END = HDCP_DDI_A,
};
/**
* enum hdcp_tc - ME/GSC Firmware defined index for transcoders
* @HDCP_INVALID_TRANSCODER: Index for Invalid transcoder
* @HDCP_TRANSCODER_EDP: Index for EDP Transcoder
* @HDCP_TRANSCODER_DSI0: Index for DSI0 Transcoder
* @HDCP_TRANSCODER_DSI1: Index for DSI1 Transcoder
* @HDCP_TRANSCODER_A: Index for Transcoder A
* @HDCP_TRANSCODER_B: Index for Transcoder B
* @HDCP_TRANSCODER_C: Index for Transcoder C
* @HDCP_TRANSCODER_D: Index for Transcoder D
*/
enum hdcp_transcoder {
HDCP_INVALID_TRANSCODER = 0x00,
HDCP_TRANSCODER_EDP,
HDCP_TRANSCODER_DSI0,
HDCP_TRANSCODER_DSI1,
HDCP_TRANSCODER_A = 0x10,
HDCP_TRANSCODER_B,
HDCP_TRANSCODER_C,
HDCP_TRANSCODER_D
};
/**
* struct hdcp_port_data - intel specific HDCP port data
* @hdcp_ddi: ddi index as per ME/GSC FW
* @hdcp_transcoder: transcoder index as per ME/GSC FW
* @port_type: HDCP port type as per ME/GSC FW classification
* @protocol: HDCP adaptation as per ME/GSC 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 hdcp_ddi hdcp_ddi;
enum hdcp_transcoder hdcp_transcoder;
u8 port_type;
u8 protocol;
u16 k;
u32 seq_num_m;
struct hdcp2_streamid_type *streams;
};
/**
* struct i915_hdcp_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_ops {
/**
* @owner: 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_arbiter - Used for communication between i915
* and hdcp drivers for the HDCP2.2 services
* @hdcp_dev: device that provide the HDCP2.2 service from MEI Bus.
* @hdcp_ops: Ops implemented by hdcp driver or intel_hdcp_gsc , used by i915 driver.
*/
struct i915_hdcp_arbiter {
struct device *hdcp_dev;
const struct i915_hdcp_ops *ops;
/* To protect the above members. */
struct mutex mutex;
};
/* fw_hdcp_status: Enumeration of all HDCP Status Codes */
enum fw_hdcp_status {
FW_HDCP_STATUS_SUCCESS = 0x0000,
/* WiDi Generic Status Codes */
FW_HDCP_STATUS_INTERNAL_ERROR = 0x1000,
FW_HDCP_STATUS_UNKNOWN_ERROR = 0x1001,
FW_HDCP_STATUS_INCORRECT_API_VERSION = 0x1002,
FW_HDCP_STATUS_INVALID_FUNCTION = 0x1003,
FW_HDCP_STATUS_INVALID_BUFFER_LENGTH = 0x1004,
FW_HDCP_STATUS_INVALID_PARAMS = 0x1005,
FW_HDCP_STATUS_AUTHENTICATION_FAILED = 0x1006,
/* WiDi Status Codes */
FW_HDCP_INVALID_SESSION_STATE = 0x6000,
FW_HDCP_SRM_FRAGMENT_UNEXPECTED = 0x6001,
FW_HDCP_SRM_INVALID_LENGTH = 0x6002,
FW_HDCP_SRM_FRAGMENT_OFFSET_INVALID = 0x6003,
FW_HDCP_SRM_VERIFICATION_FAILED = 0x6004,
FW_HDCP_SRM_VERSION_TOO_OLD = 0x6005,
FW_HDCP_RX_CERT_VERIFICATION_FAILED = 0x6006,
FW_HDCP_RX_REVOKED = 0x6007,
FW_HDCP_H_VERIFICATION_FAILED = 0x6008,
FW_HDCP_REPEATER_CHECK_UNEXPECTED = 0x6009,
FW_HDCP_TOPOLOGY_MAX_EXCEEDED = 0x600A,
FW_HDCP_V_VERIFICATION_FAILED = 0x600B,
FW_HDCP_L_VERIFICATION_FAILED = 0x600C,
FW_HDCP_STREAM_KEY_ALLOC_FAILED = 0x600D,
FW_HDCP_BASE_KEY_RESET_FAILED = 0x600E,
FW_HDCP_NONCE_GENERATION_FAILED = 0x600F,
FW_HDCP_STATUS_INVALID_E_KEY_STATE = 0x6010,
FW_HDCP_STATUS_INVALID_CS_ICV = 0x6011,
FW_HDCP_STATUS_INVALID_KB_KEY_STATE = 0x6012,
FW_HDCP_STATUS_INVALID_PAVP_MODE_ICV = 0x6013,
FW_HDCP_STATUS_INVALID_PAVP_MODE = 0x6014,
FW_HDCP_STATUS_LC_MAX_ATTEMPTS = 0x6015,
/* New status for HDCP 2.1 */
FW_HDCP_STATUS_MISMATCH_IN_M = 0x6016,
/* New status code for HDCP 2.2 Rx */
FW_HDCP_STATUS_RX_PROV_NOT_ALLOWED = 0x6017,
FW_HDCP_STATUS_RX_PROV_WRONG_SUBJECT = 0x6018,
FW_HDCP_RX_NEEDS_PROVISIONING = 0x6019,
FW_HDCP_BKSV_ICV_AUTH_FAILED = 0x6020,
FW_HDCP_STATUS_INVALID_STREAM_ID = 0x6021,
FW_HDCP_STATUS_CHAIN_NOT_INITIALIZED = 0x6022,
FW_HDCP_FAIL_NOT_EXPECTED = 0x6023,
FW_HDCP_FAIL_HDCP_OFF = 0x6024,
FW_HDCP_FAIL_INVALID_PAVP_MEMORY_MODE = 0x6025,
FW_HDCP_FAIL_AES_ECB_FAILURE = 0x6026,
FW_HDCP_FEATURE_NOT_SUPPORTED = 0x6027,
FW_HDCP_DMA_READ_ERROR = 0x6028,
FW_HDCP_DMA_WRITE_ERROR = 0x6029,
FW_HDCP_FAIL_INVALID_PACKET_SIZE = 0x6030,
FW_HDCP_H264_PARSING_ERROR = 0x6031,
FW_HDCP_HDCP2_ERRATA_VIDEO_VIOLATION = 0x6032,
FW_HDCP_HDCP2_ERRATA_AUDIO_VIOLATION = 0x6033,
FW_HDCP_TX_ACTIVE_ERROR = 0x6034,
FW_HDCP_MODE_CHANGE_ERROR = 0x6035,
FW_HDCP_STREAM_TYPE_ERROR = 0x6036,
FW_HDCP_STREAM_MANAGE_NOT_POSSIBLE = 0x6037,
FW_HDCP_STATUS_PORT_INVALID_COMMAND = 0x6038,
FW_HDCP_STATUS_UNSUPPORTED_PROTOCOL = 0x6039,
FW_HDCP_STATUS_INVALID_PORT_INDEX = 0x603a,
FW_HDCP_STATUS_TX_AUTH_NEEDED = 0x603b,
FW_HDCP_STATUS_NOT_INTEGRATED_PORT = 0x603c,
FW_HDCP_STATUS_SESSION_MAX_REACHED = 0x603d,
/* hdcp capable bit is not set in rx_caps(error is unique to DP) */
FW_HDCP_STATUS_NOT_HDCP_CAPABLE = 0x6041,
FW_HDCP_STATUS_INVALID_STREAM_COUNT = 0x6042,
};
#define HDCP_API_VERSION 0x00010000
#define HDCP_M_LEN 16
#define HDCP_KH_LEN 16
/* Payload Buffer size(Excluding Header) for CMDs and corresponding response */
/* Wired_Tx_AKE */
#define WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN (4 + 1)
#define WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_OUT (4 + 8 + 3)
#define WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN (4 + 522 + 8 + 3)
#define WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_MIN_OUT (4 + 1 + 3 + 16 + 16)
#define WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_MAX_OUT (4 + 1 + 3 + 128)
#define WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN (4 + 32)
#define WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_OUT (4)
#define WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN (4 + 16)
#define WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_OUT (4)
#define WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN (4)
#define WIRED_CMD_BUF_LEN_CLOSE_SESSION_OUT (4)
/* Wired_Tx_LC */
#define WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN (4)
#define WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_OUT (4 + 8)
#define WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN (4 + 32)
#define WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_OUT (4)
/* Wired_Tx_SKE */
#define WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN (4)
#define WIRED_CMD_BUF_LEN_GET_SESSION_KEY_OUT (4 + 16 + 8)
/* Wired_Tx_SKE */
#define WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN (4 + 1)
#define WIRED_CMD_BUF_LEN_ENABLE_AUTH_OUT (4)
/* Wired_Tx_Repeater */
#define WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN (4 + 2 + 3 + 16 + 155)
#define WIRED_CMD_BUF_LEN_VERIFY_REPEATER_OUT (4 + 1 + 16)
#define WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN (4 + 3 + \
32 + 2 + 2)
#define WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_OUT (4)
/* hdcp_command_id: Enumeration of all WIRED HDCP Command IDs */
enum hdcp_command_id {
_WIDI_COMMAND_BASE = 0x00030000,
WIDI_INITIATE_HDCP2_SESSION = _WIDI_COMMAND_BASE,
HDCP_GET_SRM_STATUS,
HDCP_SEND_SRM_FRAGMENT,
/* The wired HDCP Tx commands */
_WIRED_COMMAND_BASE = 0x00031000,
WIRED_INITIATE_HDCP2_SESSION = _WIRED_COMMAND_BASE,
WIRED_VERIFY_RECEIVER_CERT,
WIRED_AKE_SEND_HPRIME,
WIRED_AKE_SEND_PAIRING_INFO,
WIRED_INIT_LOCALITY_CHECK,
WIRED_VALIDATE_LOCALITY,
WIRED_GET_SESSION_KEY,
WIRED_ENABLE_AUTH,
WIRED_VERIFY_REPEATER,
WIRED_REPEATER_AUTH_STREAM_REQ,
WIRED_CLOSE_SESSION,
_WIRED_COMMANDS_COUNT,
};
union encrypted_buff {
u8 e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
u8 e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
struct {
u8 e_kh_km[HDCP_KH_LEN];
u8 m[HDCP_M_LEN];
} __packed;
};
/* HDCP HECI message header. All header values are little endian. */
struct hdcp_cmd_header {
u32 api_version;
u32 command_id;
enum fw_hdcp_status status;
/* Length of the HECI message (excluding the header) */
u32 buffer_len;
} __packed;
/* Empty command request or response. No data follows the header. */
struct hdcp_cmd_no_data {
struct hdcp_cmd_header header;
} __packed;
/* Uniquely identifies the hdcp port being addressed for a given command. */
struct hdcp_port_id {
u8 integrated_port_type;
/* physical_port is used until Gen11.5. Must be zero for Gen11.5+ */
u8 physical_port;
/* attached_transcoder is for Gen11.5+. Set to zero for <Gen11.5 */
u8 attached_transcoder;
u8 reserved;
} __packed;
/*
* Data structures for integrated wired HDCP2 Tx in
* support of the AKE protocol
*/
/* HECI struct for integrated wired HDCP Tx session initiation. */
struct wired_cmd_initiate_hdcp2_session_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 protocol; /* for HDMI vs DP */
} __packed;
struct wired_cmd_initiate_hdcp2_session_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 r_tx[HDCP_2_2_RTX_LEN];
struct hdcp2_tx_caps tx_caps;
} __packed;
/* HECI struct for ending an integrated wired HDCP Tx session. */
struct wired_cmd_close_session_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
struct wired_cmd_close_session_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
/* HECI struct for integrated wired HDCP Tx Rx Cert verification. */
struct wired_cmd_verify_receiver_cert_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
struct hdcp2_cert_rx cert_rx;
u8 r_rx[HDCP_2_2_RRX_LEN];
u8 rx_caps[HDCP_2_2_RXCAPS_LEN];
} __packed;
struct wired_cmd_verify_receiver_cert_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 km_stored;
u8 reserved[3];
union encrypted_buff ekm_buff;
} __packed;
/* HECI struct for verification of Rx's Hprime in a HDCP Tx session */
struct wired_cmd_ake_send_hprime_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 h_prime[HDCP_2_2_H_PRIME_LEN];
} __packed;
struct wired_cmd_ake_send_hprime_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
/*
* HECI struct for sending in AKE pairing data generated by the Rx in an
* integrated wired HDCP Tx session.
*/
struct wired_cmd_ake_send_pairing_info_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 e_kh_km[HDCP_2_2_E_KH_KM_LEN];
} __packed;
struct wired_cmd_ake_send_pairing_info_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
/* Data structures for integrated wired HDCP2 Tx in support of the LC protocol*/
/*
* HECI struct for initiating locality check with an
* integrated wired HDCP Tx session.
*/
struct wired_cmd_init_locality_check_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
struct wired_cmd_init_locality_check_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 r_n[HDCP_2_2_RN_LEN];
} __packed;
/*
* HECI struct for validating an Rx's LPrime value in an
* integrated wired HDCP Tx session.
*/
struct wired_cmd_validate_locality_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 l_prime[HDCP_2_2_L_PRIME_LEN];
} __packed;
struct wired_cmd_validate_locality_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
/*
* Data structures for integrated wired HDCP2 Tx in support of the
* SKE protocol
*/
/* HECI struct for creating session key */
struct wired_cmd_get_session_key_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
struct wired_cmd_get_session_key_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
u8 r_iv[HDCP_2_2_RIV_LEN];
} __packed;
/* HECI struct for the Tx enable authentication command */
struct wired_cmd_enable_auth_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 stream_type;
} __packed;
struct wired_cmd_enable_auth_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
/*
* Data structures for integrated wired HDCP2 Tx in support of
* the repeater protocols
*/
/*
* HECI struct for verifying the downstream repeater's HDCP topology in an
* integrated wired HDCP Tx session.
*/
struct wired_cmd_verify_repeater_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 rx_info[HDCP_2_2_RXINFO_LEN];
u8 seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
u8 v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
u8 receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
} __packed;
struct wired_cmd_verify_repeater_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 content_type_supported;
u8 v[HDCP_2_2_V_PRIME_HALF_LEN];
} __packed;
/*
* HECI struct in support of stream management in an
* integrated wired HDCP Tx session.
*/
struct wired_cmd_repeater_auth_stream_req_in {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
u8 seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
u8 m_prime[HDCP_2_2_MPRIME_LEN];
__be16 k;
struct hdcp2_streamid_type streams[];
} __packed;
struct wired_cmd_repeater_auth_stream_req_out {
struct hdcp_cmd_header header;
struct hdcp_port_id port;
} __packed;
#endif /* _I915_HDCP_INTERFACE_H_ */
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