drm: hdcp2.2 authentication msg definitions
This patch defines the hdcp2.2 protocol messages for authentication. v2: bit_fields are removed. Instead bitmasking used. [Tomas and Jani] prefix HDCP_2_2_ is added to the macros. [Tomas] v3: No Changes. v4: Style and spellings are fixed [Uma] v5: Fix for macros. v6: comment for Type is improved [Sean Paul] v7: %s/HDCP_2_2_LPRIME_HALF_LEN/HDCP_2_2_V_PRIME_HALF_LEN [Uma] %s/uintxx_t/uxx v8: %s/eceiver_id/receiver_id Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1540806351-7137-5-git-send-email-ramalingam.c@intel.com
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Ramalingam C
Daniel Vetter
parent
10ff7b11cf
commit
af5aad0598
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@ -38,4 +38,188 @@
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#define DRM_HDCP_DDC_BSTATUS 0x41
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#define DRM_HDCP_DDC_KSV_FIFO 0x43
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#define DRM_HDCP_1_4_SRM_ID 0x8
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#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
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#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
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/* Protocol message definition for HDCP2.2 specification */
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/*
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* Protected content streams are classified into 2 types:
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* - Type0: Can be transmitted with HDCP 1.4+
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* - Type1: Can be transmitted with HDCP 2.2+
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*/
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#define HDCP_STREAM_TYPE0 0x00
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#define HDCP_STREAM_TYPE1 0x01
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/* HDCP2.2 Msg IDs */
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#define HDCP_2_2_NULL_MSG 1
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#define HDCP_2_2_AKE_INIT 2
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#define HDCP_2_2_AKE_SEND_CERT 3
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#define HDCP_2_2_AKE_NO_STORED_KM 4
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#define HDCP_2_2_AKE_STORED_KM 5
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#define HDCP_2_2_AKE_SEND_HPRIME 7
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#define HDCP_2_2_AKE_SEND_PAIRING_INFO 8
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#define HDCP_2_2_LC_INIT 9
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#define HDCP_2_2_LC_SEND_LPRIME 10
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#define HDCP_2_2_SKE_SEND_EKS 11
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#define HDCP_2_2_REP_SEND_RECVID_LIST 12
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#define HDCP_2_2_REP_SEND_ACK 15
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#define HDCP_2_2_REP_STREAM_MANAGE 16
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#define HDCP_2_2_REP_STREAM_READY 17
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#define HDCP_2_2_ERRATA_DP_STREAM_TYPE 50
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#define HDCP_2_2_RTX_LEN 8
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#define HDCP_2_2_RRX_LEN 8
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#define HDCP_2_2_K_PUB_RX_MOD_N_LEN 128
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#define HDCP_2_2_K_PUB_RX_EXP_E_LEN 3
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#define HDCP_2_2_K_PUB_RX_LEN (HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
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HDCP_2_2_K_PUB_RX_EXP_E_LEN)
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#define HDCP_2_2_DCP_LLC_SIG_LEN 384
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#define HDCP_2_2_E_KPUB_KM_LEN 128
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#define HDCP_2_2_E_KH_KM_M_LEN (16 + 16)
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#define HDCP_2_2_H_PRIME_LEN 32
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#define HDCP_2_2_E_KH_KM_LEN 16
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#define HDCP_2_2_RN_LEN 8
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#define HDCP_2_2_L_PRIME_LEN 32
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#define HDCP_2_2_E_DKEY_KS_LEN 16
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#define HDCP_2_2_RIV_LEN 8
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#define HDCP_2_2_SEQ_NUM_LEN 3
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#define HDCP_2_2_V_PRIME_HALF_LEN (HDCP_2_2_L_PRIME_LEN / 2)
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#define HDCP_2_2_RECEIVER_ID_LEN DRM_HDCP_KSV_LEN
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#define HDCP_2_2_MAX_DEVICE_COUNT 31
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#define HDCP_2_2_RECEIVER_IDS_MAX_LEN (HDCP_2_2_RECEIVER_ID_LEN * \
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HDCP_2_2_MAX_DEVICE_COUNT)
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#define HDCP_2_2_MPRIME_LEN 32
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/* Following Macros take a byte at a time for bit(s) masking */
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/*
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* TODO: This has to be changed for DP MST, as multiple stream on
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* same port is possible.
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* For HDCP2.2 on HDMI and DP SST this value is always 1.
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*/
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#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT 1
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#define HDCP_2_2_TXCAP_MASK_LEN 2
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#define HDCP_2_2_RXCAPS_LEN 3
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#define HDCP_2_2_RX_REPEATER(x) ((x) & BIT(0))
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#define HDCP_2_2_DP_HDCP_CAPABLE(x) ((x) & BIT(1))
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#define HDCP_2_2_RXINFO_LEN 2
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/* HDCP1.x compliant device in downstream */
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#define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x) ((x) & BIT(0))
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/* HDCP2.0 Compliant repeater in downstream */
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#define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x) ((x) & BIT(1))
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#define HDCP_2_2_MAX_CASCADE_EXCEEDED(x) ((x) & BIT(2))
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#define HDCP_2_2_MAX_DEVS_EXCEEDED(x) ((x) & BIT(3))
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#define HDCP_2_2_DEV_COUNT_LO(x) (((x) & (0xF << 4)) >> 4)
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#define HDCP_2_2_DEV_COUNT_HI(x) ((x) & BIT(0))
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#define HDCP_2_2_DEPTH(x) (((x) & (0x7 << 1)) >> 1)
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struct hdcp2_cert_rx {
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u8 receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
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u8 kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
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u8 reserved[2];
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u8 dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
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} __packed;
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struct hdcp2_streamid_type {
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u8 stream_id;
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u8 stream_type;
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} __packed;
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/*
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* The TxCaps field specified in the HDCP HDMI, DP specs
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* This field is big endian as specified in the errata.
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*/
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struct hdcp2_tx_caps {
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/* Transmitter must set this to 0x2 */
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u8 version;
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/* Reserved for HDCP and DP Spec. Read as Zero */
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u8 tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
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} __packed;
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/* Main structures for HDCP2.2 protocol communication */
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struct hdcp2_ake_init {
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u8 msg_id;
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u8 r_tx[HDCP_2_2_RTX_LEN];
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struct hdcp2_tx_caps tx_caps;
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} __packed;
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struct hdcp2_ake_send_cert {
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u8 msg_id;
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struct hdcp2_cert_rx cert_rx;
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u8 r_rx[HDCP_2_2_RRX_LEN];
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u8 rx_caps[HDCP_2_2_RXCAPS_LEN];
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} __packed;
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struct hdcp2_ake_no_stored_km {
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u8 msg_id;
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u8 e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
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} __packed;
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struct hdcp2_ake_stored_km {
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u8 msg_id;
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u8 e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
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} __packed;
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struct hdcp2_ake_send_hprime {
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u8 msg_id;
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u8 h_prime[HDCP_2_2_H_PRIME_LEN];
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} __packed;
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struct hdcp2_ake_send_pairing_info {
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u8 msg_id;
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u8 e_kh_km[HDCP_2_2_E_KH_KM_LEN];
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} __packed;
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struct hdcp2_lc_init {
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u8 msg_id;
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u8 r_n[HDCP_2_2_RN_LEN];
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} __packed;
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struct hdcp2_lc_send_lprime {
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u8 msg_id;
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u8 l_prime[HDCP_2_2_L_PRIME_LEN];
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} __packed;
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struct hdcp2_ske_send_eks {
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u8 msg_id;
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u8 e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
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u8 riv[HDCP_2_2_RIV_LEN];
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} __packed;
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struct hdcp2_rep_send_receiverid_list {
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u8 msg_id;
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u8 rx_info[HDCP_2_2_RXINFO_LEN];
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u8 seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
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u8 v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
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u8 receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
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} __packed;
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struct hdcp2_rep_send_ack {
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u8 msg_id;
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u8 v[HDCP_2_2_V_PRIME_HALF_LEN];
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} __packed;
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struct hdcp2_rep_stream_manage {
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u8 msg_id;
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u8 seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
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__be16 k;
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struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
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} __packed;
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struct hdcp2_rep_stream_ready {
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u8 msg_id;
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u8 m_prime[HDCP_2_2_MPRIME_LEN];
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} __packed;
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struct hdcp2_dp_errata_stream_type {
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u8 msg_id;
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u8 stream_type;
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} __packed;
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#endif
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