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

diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index 98e63d8..7cd7269 100644 (file)
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -38,4 +38,188 @@
 #define DRM_HDCP_DDC_BSTATUS                   0x41
 #define DRM_HDCP_DDC_KSV_FIFO                  0x43
 
+#define DRM_HDCP_1_4_SRM_ID                    0x8
+#define DRM_HDCP_1_4_VRL_LENGTH_SIZE           3
+#define DRM_HDCP_1_4_DCP_SIG_SIZE              40
+
+/* Protocol message definition for HDCP2.2 specification */
+/*
+ * Protected content streams are classified into 2 types:
+ * - Type0: Can be transmitted with HDCP 1.4+
+ * - Type1: Can be transmitted with HDCP 2.2+
+ */
+#define HDCP_STREAM_TYPE0                      0x00
+#define HDCP_STREAM_TYPE1                      0x01
+
+/* HDCP2.2 Msg IDs */
+#define HDCP_2_2_NULL_MSG                      1
+#define HDCP_2_2_AKE_INIT                      2
+#define HDCP_2_2_AKE_SEND_CERT                 3
+#define HDCP_2_2_AKE_NO_STORED_KM              4
+#define HDCP_2_2_AKE_STORED_KM                 5
+#define HDCP_2_2_AKE_SEND_HPRIME               7
+#define HDCP_2_2_AKE_SEND_PAIRING_INFO         8
+#define HDCP_2_2_LC_INIT                       9
+#define HDCP_2_2_LC_SEND_LPRIME                        10
+#define HDCP_2_2_SKE_SEND_EKS                  11
+#define HDCP_2_2_REP_SEND_RECVID_LIST          12
+#define HDCP_2_2_REP_SEND_ACK                  15
+#define HDCP_2_2_REP_STREAM_MANAGE             16
+#define HDCP_2_2_REP_STREAM_READY              17
+#define HDCP_2_2_ERRATA_DP_STREAM_TYPE         50
+
+#define HDCP_2_2_RTX_LEN                       8
+#define HDCP_2_2_RRX_LEN                       8
+
+#define HDCP_2_2_K_PUB_RX_MOD_N_LEN            128
+#define HDCP_2_2_K_PUB_RX_EXP_E_LEN            3
+#define HDCP_2_2_K_PUB_RX_LEN                  (HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
+                                                HDCP_2_2_K_PUB_RX_EXP_E_LEN)
+
+#define HDCP_2_2_DCP_LLC_SIG_LEN               384
+
+#define HDCP_2_2_E_KPUB_KM_LEN                 128
+#define HDCP_2_2_E_KH_KM_M_LEN                 (16 + 16)
+#define HDCP_2_2_H_PRIME_LEN                   32
+#define HDCP_2_2_E_KH_KM_LEN                   16
+#define HDCP_2_2_RN_LEN                                8
+#define HDCP_2_2_L_PRIME_LEN                   32
+#define HDCP_2_2_E_DKEY_KS_LEN                 16
+#define HDCP_2_2_RIV_LEN                       8
+#define HDCP_2_2_SEQ_NUM_LEN                   3
+#define HDCP_2_2_V_PRIME_HALF_LEN              (HDCP_2_2_L_PRIME_LEN / 2)
+#define HDCP_2_2_RECEIVER_ID_LEN               DRM_HDCP_KSV_LEN
+#define HDCP_2_2_MAX_DEVICE_COUNT              31
+#define HDCP_2_2_RECEIVER_IDS_MAX_LEN          (HDCP_2_2_RECEIVER_ID_LEN * \
+                                                HDCP_2_2_MAX_DEVICE_COUNT)
+#define HDCP_2_2_MPRIME_LEN                    32
+
+/* Following Macros take a byte at a time for bit(s) masking */
+/*
+ * TODO: This has to be changed for DP MST, as multiple stream on
+ * same port is possible.
+ * For HDCP2.2 on HDMI and DP SST this value is always 1.
+ */
+#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT       1
+#define HDCP_2_2_TXCAP_MASK_LEN                        2
+#define HDCP_2_2_RXCAPS_LEN                    3
+#define HDCP_2_2_RX_REPEATER(x)                        ((x) & BIT(0))
+#define HDCP_2_2_DP_HDCP_CAPABLE(x)            ((x) & BIT(1))
+#define HDCP_2_2_RXINFO_LEN                    2
+
+/* HDCP1.x compliant device in downstream */
+#define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x)     ((x) & BIT(0))
+
+/* HDCP2.0 Compliant repeater in downstream */
+#define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x)     ((x) & BIT(1))
+#define HDCP_2_2_MAX_CASCADE_EXCEEDED(x)       ((x) & BIT(2))
+#define HDCP_2_2_MAX_DEVS_EXCEEDED(x)          ((x) & BIT(3))
+#define HDCP_2_2_DEV_COUNT_LO(x)               (((x) & (0xF << 4)) >> 4)
+#define HDCP_2_2_DEV_COUNT_HI(x)               ((x) & BIT(0))
+#define HDCP_2_2_DEPTH(x)                      (((x) & (0x7 << 1)) >> 1)
+
+struct hdcp2_cert_rx {
+       u8      receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
+       u8      kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
+       u8      reserved[2];
+       u8      dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
+} __packed;
+
+struct hdcp2_streamid_type {
+       u8      stream_id;
+       u8      stream_type;
+} __packed;
+
+/*
+ * The TxCaps field specified in the HDCP HDMI, DP specs
+ * This field is big endian as specified in the errata.
+ */
+struct hdcp2_tx_caps {
+       /* Transmitter must set this to 0x2 */
+       u8      version;
+
+       /* Reserved for HDCP and DP Spec. Read as Zero */
+       u8      tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
+} __packed;
+
+/* Main structures for HDCP2.2 protocol communication */
+struct hdcp2_ake_init {
+       u8                      msg_id;
+       u8                      r_tx[HDCP_2_2_RTX_LEN];
+       struct hdcp2_tx_caps    tx_caps;
+} __packed;
+
+struct hdcp2_ake_send_cert {
+       u8                      msg_id;
+       struct hdcp2_cert_rx    cert_rx;
+       u8                      r_rx[HDCP_2_2_RRX_LEN];
+       u8                      rx_caps[HDCP_2_2_RXCAPS_LEN];
+} __packed;
+
+struct hdcp2_ake_no_stored_km {
+       u8      msg_id;
+       u8      e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
+} __packed;
+
+struct hdcp2_ake_stored_km {
+       u8      msg_id;
+       u8      e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
+} __packed;
+
+struct hdcp2_ake_send_hprime {
+       u8      msg_id;
+       u8      h_prime[HDCP_2_2_H_PRIME_LEN];
+} __packed;
+
+struct hdcp2_ake_send_pairing_info {
+       u8      msg_id;
+       u8      e_kh_km[HDCP_2_2_E_KH_KM_LEN];
+} __packed;
+
+struct hdcp2_lc_init {
+       u8      msg_id;
+       u8      r_n[HDCP_2_2_RN_LEN];
+} __packed;
+
+struct hdcp2_lc_send_lprime {
+       u8      msg_id;
+       u8      l_prime[HDCP_2_2_L_PRIME_LEN];
+} __packed;
+
+struct hdcp2_ske_send_eks {
+       u8      msg_id;
+       u8      e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
+       u8      riv[HDCP_2_2_RIV_LEN];
+} __packed;
+
+struct hdcp2_rep_send_receiverid_list {
+       u8      msg_id;
+       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 hdcp2_rep_send_ack {
+       u8      msg_id;
+       u8      v[HDCP_2_2_V_PRIME_HALF_LEN];
+} __packed;
+
+struct hdcp2_rep_stream_manage {
+       u8                      msg_id;
+       u8                      seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
+       __be16                  k;
+       struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
+} __packed;
+
+struct hdcp2_rep_stream_ready {
+       u8      msg_id;
+       u8      m_prime[HDCP_2_2_MPRIME_LEN];
+} __packed;
+
+struct hdcp2_dp_errata_stream_type {
+       u8      msg_id;
+       u8      stream_type;
+} __packed;
+
 #endif