Message ID | 1518617638-21684-2-git-send-email-ramalingam.c@intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
> > This patch defines the hdcp2.2 protocol messages for the > HDCP2.2 authentication. > > Signed-off-by: Ramalingam C <ramalingam.c@intel.com> > --- > include/drm/drm_hdcp.h | 226 > +++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 226 insertions(+) > > diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index > 562fa7df2637..9661c700cebb 100644 > --- a/include/drm/drm_hdcp.h > +++ b/include/drm/drm_hdcp.h > @@ -38,4 +38,230 @@ > #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 > + > +struct cp_srm_header { > + struct { > + uint8_t reserved_hi:4; > + uint8_t srm_id:4; > + uint8_t reserved_lo; > + } spec_indicator; Do you really want to work with bit fields? I mean in all the all structures. > + uint16_t srm_version; Shouldn't be it __le16? > + uint8_t srm_gen_no; > +} __packed; > + > +/** > + * Protocol message definition for HDCP2.2 specification */ > + > +#define HDCP_STREAM_TYPE0 0x00 > +#define HDCP_STREAM_TYPE1 0x01 > + > +/* HDCP2.2 Msg IDs */ > +#define NULL_MSG 1 We need some HDCP2_ prefix this is in kernel global space and some of the constants have very generic name that can collide. > +#define AKE_INIT 2 > +#define AKE_SEND_CERT 3 > +#define AKE_NO_STORED_KM 4 > +#define AKE_STORED_KM 5 > +#define AKE_SEND_HPRIME 7 > +#define AKE_SEND_PARING_INFO 8 > +#define LC_INIT 9 > +#define LC_SEND_LPRIME 10 > +#define SKE_SEND_EKS 11 > +#define REP_SEND_RECVID_LIST 12 > +#define REP_SEND_ACK 15 > +#define REP_STREAM_MANAGE 16 > +#define REP_STREAM_READY 17 > +#define ERRATA_DP_STREAM_TYPE 50 > + > +#define HDCP_RTX_LEN 8 > +#define HDCP_RRX_LEN 8 > +#define RECEIVER_ID_SIZE 5 > + > +#define K_PUB_RX_MOD_N_SIZE 128 > +#define K_PUB_RX_EXP_E_SIZE 3 > +#define K_PUB_RX_SIZE > (K_PUB_RX_MOD_N_SIZE + \ > + K_PUB_RX_EXP_E_SIZE) > + > +#define DCP_LLC_SIGNATURE_SIZE 384 > + > +#define HDCP_E_KPUB_KM_LEN 128 > +#define HDCP_E_KH_KM_M_LEN (16 + 16) > +#define HDCP_H_PRIME_LEN 32 > +#define HDCP_E_KH_KM_LEN 16 > +#define HDCP_RN_LEN 8 > +#define HDCP_L_PRIME_LEN 32 > +#define HDCP_E_DKEY_KS_LEN 16 > +#define HDCP_RIV_LEN 8 > +#define HDCP_SEQ_NUM_LEN 3 > +#define HDCP_LPRIME_HALF_SIZE (HDCP_L_PRIME_LEN > / 2) > +#define HDCP_RECEIVER_ID_LEN 5 > +#define HDCP_MAX_DEVICE_COUNT 31 > +#define HDCP_RECEIVER_IDS_MAX_LEN > (HDCP_RECEIVER_ID_LEN * \ > + HDCP_MAX_DEVICE_COUNT) > + > +/** > + * 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 MAX_CONTENT_STREAMS_CNT 1 > + > +#define HDCP_MPRIME_LEN 32 > + > +struct hdcp2_cert_rx { > + uint8_t receiver_id[RECEIVER_ID_SIZE]; > + uint8_t kpub_rx[K_PUB_RX_SIZE]; > + uint8_t reserved1 :4; > + > + /* As per HDMI & DP HDCP Spec, must be 0x0 or 0x1 */ > + uint8_t protocol_descriptor :4; > + > + /* As per HDMI & DP HDCP Spec, must be 0x0000 */ > + uint8_t reserved2; > + uint8_t dcp_signature[DCP_LLC_SIGNATURE_SIZE]; > +} __packed; > + > +/** > + * The RxCaps field specified in the HDCP HDMI, DP specs > + * This field is big endian as specified in the errata. > + */ > +union hdcp2_rx_caps { > + struct { > + uint8_t version; > + uint8_t receiver_capability_mask_hi; > + uint8_t repeater:1; > + > + /* Rsvd in HDMI. Applicable in DP alone */ > + uint8_t hdcp_capable:1; > + uint8_t receiver_capability_mask_low:6; > + } fields; > + uint8_t rx_caps_value[3]; > +} __packed; > + > +/** > + * RxInfo fields Contains various topology information for the > + * repeater authentication flows > + */ > +union hdcp2_rx_info { > + struct { > + uint8_t device_count_hi:1; > + uint8_t depth:3; > + uint8_t rsvd:4; > + > + /* Bit-0: downstream HDCP 1.x device exist */ > + uint8_t hdcp1_device_downstream:1; > + > + /* Bit-1: downstream HDCP 2.0, 2.1 device exist */ > + uint8_t hdcp2_legacy_device_downstream:1; > + > + /* Bit-2: downstream Topology limit errors */ > + uint8_t max_cascade_exceeded:1; > + uint8_t max_devs_exceeded:1; > + uint8_t device_count_lo:4; > + > + } fields; > + uint16_t rx_info_value; Should be probably __le16 and better to use bitmask then bit fields. > +} __packed; > + > +struct hdcp2_streamid_type { > + uint8_t stream_id; > + uint8_t 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 { > + uint8_t version; > + > + /* Reserved for HDCP and DP Spec. Read as Zero */ > + uint16_t transmitter_capability_mask; > +} __packed; > + > +/* > + * Main structures for HDCP2.2 protocol communication */ struct > +hdcp2_ake_init { > + uint8_t msg_id; > + uint8_t r_tx[HDCP_RTX_LEN]; > + struct hdcp2_tx_caps tx_caps; > +} __packed; > + > +struct hdcp2_ake_send_cert { > + uint8_t msg_id; > + struct hdcp2_cert_rx cert_rx; > + uint8_t r_rx[HDCP_RRX_LEN]; > + union hdcp2_rx_caps rx_caps; > +} __packed; > + > +struct hdcp2_ake_no_stored_km { > + uint8_t msg_id; > + uint8_t e_kpub_km[HDCP_E_KPUB_KM_LEN]; > +} __packed; > + > +struct hdcp2_ake_stored_km { > + uint8_t msg_id; > + uint8_t e_kh_km_m[HDCP_E_KH_KM_M_LEN]; > +} __packed; > + > +struct hdcp2_ake_send_hprime { > + uint8_t msg_id; > + uint8_t h_prime[HDCP_H_PRIME_LEN]; > +} __packed; > + > +struct hdcp2_ake_send_pairing_info { > + uint8_t msg_id; > + uint8_t e_kh_km[HDCP_E_KH_KM_LEN]; > +} __packed; > + > +struct hdcp2_lc_init { > + uint8_t msg_id; > + uint8_t r_n[HDCP_RN_LEN]; > +} __packed; > + > +struct hdcp2_lc_send_lprime { > + uint8_t msg_id; > + uint8_t l_prime[HDCP_L_PRIME_LEN]; > +} __packed; > + > +struct hdcp2_ske_send_eks { > + uint8_t msg_id; > + uint8_t e_dkey_ks[HDCP_E_DKEY_KS_LEN]; > + uint8_t riv[HDCP_RIV_LEN]; > +} __packed; > + > +struct hdcp2_rep_send_receiverid_list { > + uint8_t msg_id; > + union hdcp2_rx_info rx_info; > + uint8_t seq_num_v[HDCP_SEQ_NUM_LEN]; > + uint8_t v_prime[HDCP_LPRIME_HALF_SIZE]; > + uint8_t receiver_ids[HDCP_RECEIVER_IDS_MAX_LEN]; > +} __packed; > + > +struct hdcp2_rep_send_ack { > + uint8_t msg_id; > + uint8_t v[HDCP_LPRIME_HALF_SIZE]; > +} __packed; > + > +struct hdcp2_rep_stream_manage { > + uint8_t msg_id; > + uint8_t seq_num_m[HDCP_SEQ_NUM_LEN]; > + uint16_t k; > + struct hdcp2_streamid_type > streams[MAX_CONTENT_STREAMS_CNT]; } > +__packed; > + > +struct hdcp2_rep_stream_ready { > + uint8_t msg_id; > + uint8_t m_prime[HDCP_MPRIME_LEN]; > +} __packed; > + > +struct hdcp2_dp_errata_stream_type { > + uint8_t msg_id; > + uint8_t stream_type; > +} __packed; > + > #endif > -- > 2.7.4
On Wed, 14 Feb 2018, "Winkler, Tomas" <tomas.winkler@intel.com> wrote: >> >> This patch defines the hdcp2.2 protocol messages for the >> HDCP2.2 authentication. >> >> Signed-off-by: Ramalingam C <ramalingam.c@intel.com> >> --- >> include/drm/drm_hdcp.h | 226 >> +++++++++++++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 226 insertions(+) >> >> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index >> 562fa7df2637..9661c700cebb 100644 >> --- a/include/drm/drm_hdcp.h >> +++ b/include/drm/drm_hdcp.h >> @@ -38,4 +38,230 @@ >> #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 >> + >> +struct cp_srm_header { >> + struct { >> + uint8_t reserved_hi:4; >> + uint8_t srm_id:4; >> + uint8_t reserved_lo; >> + } spec_indicator; > Do you really want to work with bit fields? I mean in all the all structures. We *can't* use bitfields in drm core for (un)marshalling. They depend on endianness. (Thanks to folks on #dri-devel for confirming.) We use them at places in i915 where we can be pretty sure about running on little-endian machines, but that doesn't hold here. Packed structs are fine otherwise though, just not bitfields. BR, Jani.
On Thursday 15 February 2018 01:10 AM, Jani Nikula wrote: > On Wed, 14 Feb 2018, "Winkler, Tomas" <tomas.winkler@intel.com> wrote: >>> This patch defines the hdcp2.2 protocol messages for the >>> HDCP2.2 authentication. >>> >>> Signed-off-by: Ramalingam C <ramalingam.c@intel.com> >>> --- >>> include/drm/drm_hdcp.h | 226 >>> +++++++++++++++++++++++++++++++++++++++++++++++++ >>> 1 file changed, 226 insertions(+) >>> >>> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index >>> 562fa7df2637..9661c700cebb 100644 >>> --- a/include/drm/drm_hdcp.h >>> +++ b/include/drm/drm_hdcp.h >>> @@ -38,4 +38,230 @@ >>> #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 >>> + >>> +struct cp_srm_header { >>> + struct { >>> + uint8_t reserved_hi:4; >>> + uint8_t srm_id:4; >>> + uint8_t reserved_lo; >>> + } spec_indicator; >> Do you really want to work with bit fields? I mean in all the all structures. > We *can't* use bitfields in drm core for (un)marshalling. They depend on > endianness. (Thanks to folks on #dri-devel for confirming.) We use them > at places in i915 where we can be pretty sure about running on > little-endian machines, but that doesn't hold here. > > Packed structs are fine otherwise though, just not bitfields. Thanks Jani. I will rework on that. --Ram > > BR, > Jani. >
On Wednesday 14 February 2018 08:45 PM, Winkler, Tomas wrote: >> This patch defines the hdcp2.2 protocol messages for the >> HDCP2.2 authentication. >> >> Signed-off-by: Ramalingam C <ramalingam.c@intel.com> >> --- >> include/drm/drm_hdcp.h | 226 >> +++++++++++++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 226 insertions(+) >> >> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index >> 562fa7df2637..9661c700cebb 100644 >> --- a/include/drm/drm_hdcp.h >> +++ b/include/drm/drm_hdcp.h >> @@ -38,4 +38,230 @@ >> #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 >> + >> +struct cp_srm_header { >> + struct { >> + uint8_t reserved_hi:4; >> + uint8_t srm_id:4; >> + uint8_t reserved_lo; >> + } spec_indicator; > Do you really want to work with bit fields? I mean in all the all structures. I will rework on replacing all bitfields. >> + uint16_t srm_version; > Shouldn't be it __le16? And all multi-byte variables needs to be revisited for endianness. >> + uint8_t srm_gen_no; >> +} __packed; >> + >> +/** >> + * Protocol message definition for HDCP2.2 specification */ >> + >> +#define HDCP_STREAM_TYPE0 0x00 >> +#define HDCP_STREAM_TYPE1 0x01 >> + >> +/* HDCP2.2 Msg IDs */ >> +#define NULL_MSG 1 > > We need some HDCP2_ prefix this is in kernel global space and > some of the constants have very generic name that can collide. Sure I will add the prefix, to avoid possible conflicts. Thanks. --Ram > >> +#define AKE_INIT 2 >> +#define AKE_SEND_CERT 3 > > >> +#define AKE_NO_STORED_KM 4 >> +#define AKE_STORED_KM 5 >> +#define AKE_SEND_HPRIME 7 >> +#define AKE_SEND_PARING_INFO 8 >> +#define LC_INIT 9 >> +#define LC_SEND_LPRIME 10 >> +#define SKE_SEND_EKS 11 >> +#define REP_SEND_RECVID_LIST 12 >> +#define REP_SEND_ACK 15 >> +#define REP_STREAM_MANAGE 16 >> +#define REP_STREAM_READY 17 >> +#define ERRATA_DP_STREAM_TYPE 50 >> + >> +#define HDCP_RTX_LEN 8 >> +#define HDCP_RRX_LEN 8 >> +#define RECEIVER_ID_SIZE 5 >> + >> +#define K_PUB_RX_MOD_N_SIZE 128 >> +#define K_PUB_RX_EXP_E_SIZE 3 >> +#define K_PUB_RX_SIZE >> (K_PUB_RX_MOD_N_SIZE + \ >> + K_PUB_RX_EXP_E_SIZE) >> + >> +#define DCP_LLC_SIGNATURE_SIZE 384 >> + >> +#define HDCP_E_KPUB_KM_LEN 128 >> +#define HDCP_E_KH_KM_M_LEN (16 + 16) >> +#define HDCP_H_PRIME_LEN 32 >> +#define HDCP_E_KH_KM_LEN 16 >> +#define HDCP_RN_LEN 8 >> +#define HDCP_L_PRIME_LEN 32 >> +#define HDCP_E_DKEY_KS_LEN 16 >> +#define HDCP_RIV_LEN 8 >> +#define HDCP_SEQ_NUM_LEN 3 >> +#define HDCP_LPRIME_HALF_SIZE (HDCP_L_PRIME_LEN >> / 2) >> +#define HDCP_RECEIVER_ID_LEN 5 >> +#define HDCP_MAX_DEVICE_COUNT 31 >> +#define HDCP_RECEIVER_IDS_MAX_LEN >> (HDCP_RECEIVER_ID_LEN * \ >> + HDCP_MAX_DEVICE_COUNT) >> + >> +/** >> + * 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 MAX_CONTENT_STREAMS_CNT 1 >> + >> +#define HDCP_MPRIME_LEN 32 >> + >> +struct hdcp2_cert_rx { >> + uint8_t receiver_id[RECEIVER_ID_SIZE]; >> + uint8_t kpub_rx[K_PUB_RX_SIZE]; >> + uint8_t reserved1 :4; >> + >> + /* As per HDMI & DP HDCP Spec, must be 0x0 or 0x1 */ >> + uint8_t protocol_descriptor :4; >> + >> + /* As per HDMI & DP HDCP Spec, must be 0x0000 */ >> + uint8_t reserved2; >> + uint8_t dcp_signature[DCP_LLC_SIGNATURE_SIZE]; >> +} __packed; >> + >> +/** >> + * The RxCaps field specified in the HDCP HDMI, DP specs >> + * This field is big endian as specified in the errata. >> + */ >> +union hdcp2_rx_caps { >> + struct { >> + uint8_t version; >> + uint8_t receiver_capability_mask_hi; >> + uint8_t repeater:1; >> + >> + /* Rsvd in HDMI. Applicable in DP alone */ >> + uint8_t hdcp_capable:1; >> + uint8_t receiver_capability_mask_low:6; >> + } fields; >> + uint8_t rx_caps_value[3]; >> +} __packed; >> + >> +/** >> + * RxInfo fields Contains various topology information for the >> + * repeater authentication flows >> + */ >> +union hdcp2_rx_info { >> + struct { >> + uint8_t device_count_hi:1; >> + uint8_t depth:3; >> + uint8_t rsvd:4; >> + >> + /* Bit-0: downstream HDCP 1.x device exist */ >> + uint8_t hdcp1_device_downstream:1; >> + >> + /* Bit-1: downstream HDCP 2.0, 2.1 device exist */ >> + uint8_t hdcp2_legacy_device_downstream:1; >> + >> + /* Bit-2: downstream Topology limit errors */ >> + uint8_t max_cascade_exceeded:1; >> + uint8_t max_devs_exceeded:1; >> + uint8_t device_count_lo:4; >> + >> + } fields; >> + uint16_t rx_info_value; > Should be probably __le16 and better to use bitmask then bit fields. > >> +} __packed; >> + >> +struct hdcp2_streamid_type { >> + uint8_t stream_id; >> + uint8_t 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 { >> + uint8_t version; >> + >> + /* Reserved for HDCP and DP Spec. Read as Zero */ >> + uint16_t transmitter_capability_mask; >> +} __packed; >> + >> +/* >> + * Main structures for HDCP2.2 protocol communication */ struct >> +hdcp2_ake_init { >> + uint8_t msg_id; >> + uint8_t r_tx[HDCP_RTX_LEN]; >> + struct hdcp2_tx_caps tx_caps; >> +} __packed; >> + >> +struct hdcp2_ake_send_cert { >> + uint8_t msg_id; >> + struct hdcp2_cert_rx cert_rx; >> + uint8_t r_rx[HDCP_RRX_LEN]; >> + union hdcp2_rx_caps rx_caps; >> +} __packed; >> + >> +struct hdcp2_ake_no_stored_km { >> + uint8_t msg_id; >> + uint8_t e_kpub_km[HDCP_E_KPUB_KM_LEN]; >> +} __packed; >> + >> +struct hdcp2_ake_stored_km { >> + uint8_t msg_id; >> + uint8_t e_kh_km_m[HDCP_E_KH_KM_M_LEN]; >> +} __packed; >> + >> +struct hdcp2_ake_send_hprime { >> + uint8_t msg_id; >> + uint8_t h_prime[HDCP_H_PRIME_LEN]; >> +} __packed; >> + >> +struct hdcp2_ake_send_pairing_info { >> + uint8_t msg_id; >> + uint8_t e_kh_km[HDCP_E_KH_KM_LEN]; >> +} __packed; >> + >> +struct hdcp2_lc_init { >> + uint8_t msg_id; >> + uint8_t r_n[HDCP_RN_LEN]; >> +} __packed; >> + >> +struct hdcp2_lc_send_lprime { >> + uint8_t msg_id; >> + uint8_t l_prime[HDCP_L_PRIME_LEN]; >> +} __packed; >> + >> +struct hdcp2_ske_send_eks { >> + uint8_t msg_id; >> + uint8_t e_dkey_ks[HDCP_E_DKEY_KS_LEN]; >> + uint8_t riv[HDCP_RIV_LEN]; >> +} __packed; >> + >> +struct hdcp2_rep_send_receiverid_list { >> + uint8_t msg_id; >> + union hdcp2_rx_info rx_info; >> + uint8_t seq_num_v[HDCP_SEQ_NUM_LEN]; >> + uint8_t v_prime[HDCP_LPRIME_HALF_SIZE]; >> + uint8_t receiver_ids[HDCP_RECEIVER_IDS_MAX_LEN]; >> +} __packed; >> + >> +struct hdcp2_rep_send_ack { >> + uint8_t msg_id; >> + uint8_t v[HDCP_LPRIME_HALF_SIZE]; >> +} __packed; >> + >> +struct hdcp2_rep_stream_manage { >> + uint8_t msg_id; >> + uint8_t seq_num_m[HDCP_SEQ_NUM_LEN]; >> + uint16_t k; >> + struct hdcp2_streamid_type >> streams[MAX_CONTENT_STREAMS_CNT]; } >> +__packed; >> + >> +struct hdcp2_rep_stream_ready { >> + uint8_t msg_id; >> + uint8_t m_prime[HDCP_MPRIME_LEN]; >> +} __packed; >> + >> +struct hdcp2_dp_errata_stream_type { >> + uint8_t msg_id; >> + uint8_t stream_type; >> +} __packed; >> + >> #endif >> -- >> 2.7.4
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 562fa7df2637..9661c700cebb 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -38,4 +38,230 @@ #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 + +struct cp_srm_header { + struct { + uint8_t reserved_hi:4; + uint8_t srm_id:4; + uint8_t reserved_lo; + } spec_indicator; + uint16_t srm_version; + uint8_t srm_gen_no; +} __packed; + +/** + * Protocol message definition for HDCP2.2 specification + */ + +#define HDCP_STREAM_TYPE0 0x00 +#define HDCP_STREAM_TYPE1 0x01 + +/* HDCP2.2 Msg IDs */ +#define NULL_MSG 1 +#define AKE_INIT 2 +#define AKE_SEND_CERT 3 +#define AKE_NO_STORED_KM 4 +#define AKE_STORED_KM 5 +#define AKE_SEND_HPRIME 7 +#define AKE_SEND_PARING_INFO 8 +#define LC_INIT 9 +#define LC_SEND_LPRIME 10 +#define SKE_SEND_EKS 11 +#define REP_SEND_RECVID_LIST 12 +#define REP_SEND_ACK 15 +#define REP_STREAM_MANAGE 16 +#define REP_STREAM_READY 17 +#define ERRATA_DP_STREAM_TYPE 50 + +#define HDCP_RTX_LEN 8 +#define HDCP_RRX_LEN 8 +#define RECEIVER_ID_SIZE 5 + +#define K_PUB_RX_MOD_N_SIZE 128 +#define K_PUB_RX_EXP_E_SIZE 3 +#define K_PUB_RX_SIZE (K_PUB_RX_MOD_N_SIZE + \ + K_PUB_RX_EXP_E_SIZE) + +#define DCP_LLC_SIGNATURE_SIZE 384 + +#define HDCP_E_KPUB_KM_LEN 128 +#define HDCP_E_KH_KM_M_LEN (16 + 16) +#define HDCP_H_PRIME_LEN 32 +#define HDCP_E_KH_KM_LEN 16 +#define HDCP_RN_LEN 8 +#define HDCP_L_PRIME_LEN 32 +#define HDCP_E_DKEY_KS_LEN 16 +#define HDCP_RIV_LEN 8 +#define HDCP_SEQ_NUM_LEN 3 +#define HDCP_LPRIME_HALF_SIZE (HDCP_L_PRIME_LEN / 2) +#define HDCP_RECEIVER_ID_LEN 5 +#define HDCP_MAX_DEVICE_COUNT 31 +#define HDCP_RECEIVER_IDS_MAX_LEN (HDCP_RECEIVER_ID_LEN * \ + HDCP_MAX_DEVICE_COUNT) + +/** + * 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 MAX_CONTENT_STREAMS_CNT 1 + +#define HDCP_MPRIME_LEN 32 + +struct hdcp2_cert_rx { + uint8_t receiver_id[RECEIVER_ID_SIZE]; + uint8_t kpub_rx[K_PUB_RX_SIZE]; + uint8_t reserved1 :4; + + /* As per HDMI & DP HDCP Spec, must be 0x0 or 0x1 */ + uint8_t protocol_descriptor :4; + + /* As per HDMI & DP HDCP Spec, must be 0x0000 */ + uint8_t reserved2; + uint8_t dcp_signature[DCP_LLC_SIGNATURE_SIZE]; +} __packed; + +/** + * The RxCaps field specified in the HDCP HDMI, DP specs + * This field is big endian as specified in the errata. + */ +union hdcp2_rx_caps { + struct { + uint8_t version; + uint8_t receiver_capability_mask_hi; + uint8_t repeater:1; + + /* Rsvd in HDMI. Applicable in DP alone */ + uint8_t hdcp_capable:1; + uint8_t receiver_capability_mask_low:6; + } fields; + uint8_t rx_caps_value[3]; +} __packed; + +/** + * RxInfo fields Contains various topology information for the + * repeater authentication flows + */ +union hdcp2_rx_info { + struct { + uint8_t device_count_hi:1; + uint8_t depth:3; + uint8_t rsvd:4; + + /* Bit-0: downstream HDCP 1.x device exist */ + uint8_t hdcp1_device_downstream:1; + + /* Bit-1: downstream HDCP 2.0, 2.1 device exist */ + uint8_t hdcp2_legacy_device_downstream:1; + + /* Bit-2: downstream Topology limit errors */ + uint8_t max_cascade_exceeded:1; + uint8_t max_devs_exceeded:1; + uint8_t device_count_lo:4; + + } fields; + uint16_t rx_info_value; +} __packed; + +struct hdcp2_streamid_type { + uint8_t stream_id; + uint8_t 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 { + uint8_t version; + + /* Reserved for HDCP and DP Spec. Read as Zero */ + uint16_t transmitter_capability_mask; +} __packed; + +/* + * Main structures for HDCP2.2 protocol communication + */ +struct hdcp2_ake_init { + uint8_t msg_id; + uint8_t r_tx[HDCP_RTX_LEN]; + struct hdcp2_tx_caps tx_caps; +} __packed; + +struct hdcp2_ake_send_cert { + uint8_t msg_id; + struct hdcp2_cert_rx cert_rx; + uint8_t r_rx[HDCP_RRX_LEN]; + union hdcp2_rx_caps rx_caps; +} __packed; + +struct hdcp2_ake_no_stored_km { + uint8_t msg_id; + uint8_t e_kpub_km[HDCP_E_KPUB_KM_LEN]; +} __packed; + +struct hdcp2_ake_stored_km { + uint8_t msg_id; + uint8_t e_kh_km_m[HDCP_E_KH_KM_M_LEN]; +} __packed; + +struct hdcp2_ake_send_hprime { + uint8_t msg_id; + uint8_t h_prime[HDCP_H_PRIME_LEN]; +} __packed; + +struct hdcp2_ake_send_pairing_info { + uint8_t msg_id; + uint8_t e_kh_km[HDCP_E_KH_KM_LEN]; +} __packed; + +struct hdcp2_lc_init { + uint8_t msg_id; + uint8_t r_n[HDCP_RN_LEN]; +} __packed; + +struct hdcp2_lc_send_lprime { + uint8_t msg_id; + uint8_t l_prime[HDCP_L_PRIME_LEN]; +} __packed; + +struct hdcp2_ske_send_eks { + uint8_t msg_id; + uint8_t e_dkey_ks[HDCP_E_DKEY_KS_LEN]; + uint8_t riv[HDCP_RIV_LEN]; +} __packed; + +struct hdcp2_rep_send_receiverid_list { + uint8_t msg_id; + union hdcp2_rx_info rx_info; + uint8_t seq_num_v[HDCP_SEQ_NUM_LEN]; + uint8_t v_prime[HDCP_LPRIME_HALF_SIZE]; + uint8_t receiver_ids[HDCP_RECEIVER_IDS_MAX_LEN]; +} __packed; + +struct hdcp2_rep_send_ack { + uint8_t msg_id; + uint8_t v[HDCP_LPRIME_HALF_SIZE]; +} __packed; + +struct hdcp2_rep_stream_manage { + uint8_t msg_id; + uint8_t seq_num_m[HDCP_SEQ_NUM_LEN]; + uint16_t k; + struct hdcp2_streamid_type streams[MAX_CONTENT_STREAMS_CNT]; +} __packed; + +struct hdcp2_rep_stream_ready { + uint8_t msg_id; + uint8_t m_prime[HDCP_MPRIME_LEN]; +} __packed; + +struct hdcp2_dp_errata_stream_type { + uint8_t msg_id; + uint8_t stream_type; +} __packed; + #endif
This patch defines the hdcp2.2 protocol messages for the HDCP2.2 authentication. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> --- include/drm/drm_hdcp.h | 226 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 226 insertions(+)