// SPDX-License-Identifier: MIT /* * Copyright 2023, Intel Corporation. */ #include #include "gem/i915_gem_region.h" #include "gt/intel_gt.h" #include "gt/uc/intel_gsc_uc_heci_cmd_submit.h" #include "i915_drv.h" #include "i915_utils.h" #include "intel_hdcp_gsc.h" bool intel_hdcp_gsc_cs_required(struct drm_i915_private *i915) { return DISPLAY_VER(i915) >= 14; } static int gsc_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data, struct hdcp2_ake_init *ake_data) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } }; struct wired_cmd_initiate_hdcp2_session_out session_init_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !ake_data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } session_init_in.header.api_version = HDCP_API_VERSION; session_init_in.header.command_id = WIRED_INITIATE_HDCP2_SESSION; session_init_in.header.status = FW_HDCP_STATUS_SUCCESS; session_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN; session_init_in.port.integrated_port_type = data->port_type; session_init_in.port.physical_port = (u8)data->hdcp_ddi; session_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder; session_init_in.protocol = data->protocol; byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&session_init_in, sizeof(session_init_in), (u8 *)&session_init_out, sizeof(session_init_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (session_init_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", WIRED_INITIATE_HDCP2_SESSION, session_init_out.header.status); return -EIO; } ake_data->msg_id = HDCP_2_2_AKE_INIT; ake_data->tx_caps = session_init_out.tx_caps; memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN); return 0; #endif } static int gsc_hdcp_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) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = { { 0 } }; struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !rx_cert || !km_stored || !ek_pub_km || !msg_sz) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } verify_rxcert_in.header.api_version = HDCP_API_VERSION; verify_rxcert_in.header.command_id = WIRED_VERIFY_RECEIVER_CERT; verify_rxcert_in.header.status = FW_HDCP_STATUS_SUCCESS; verify_rxcert_in.header.buffer_len = WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN; verify_rxcert_in.port.integrated_port_type = data->port_type; verify_rxcert_in.port.physical_port = (u8)data->hdcp_ddi; verify_rxcert_in.port.attached_transcoder = (u8)data->hdcp_transcoder; verify_rxcert_in.cert_rx = rx_cert->cert_rx; memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN); memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_rxcert_in, sizeof(verify_rxcert_in), (u8 *)&verify_rxcert_out, sizeof(verify_rxcert_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed: %zd\n", byte); return byte; } if (verify_rxcert_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", WIRED_VERIFY_RECEIVER_CERT, verify_rxcert_out.header.status); return -EIO; } *km_stored = !!verify_rxcert_out.km_stored; if (verify_rxcert_out.km_stored) { ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM; *msg_sz = sizeof(struct hdcp2_ake_stored_km); } else { ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM; *msg_sz = sizeof(struct hdcp2_ake_no_stored_km); } memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff, sizeof(verify_rxcert_out.ekm_buff)); return 0; #endif } static int gsc_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data, struct hdcp2_ake_send_hprime *rx_hprime) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } }; struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !rx_hprime) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } send_hprime_in.header.api_version = HDCP_API_VERSION; send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME; send_hprime_in.header.status = FW_HDCP_STATUS_SUCCESS; send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN; send_hprime_in.port.integrated_port_type = data->port_type; send_hprime_in.port.physical_port = (u8)data->hdcp_ddi; send_hprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder; memcpy(send_hprime_in.h_prime, rx_hprime->h_prime, HDCP_2_2_H_PRIME_LEN); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&send_hprime_in, sizeof(send_hprime_in), (u8 *)&send_hprime_out, sizeof(send_hprime_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (send_hprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. Status: 0x%X\n", WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status); return -EIO; } return 0; #endif } static int gsc_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data, struct hdcp2_ake_send_pairing_info *pairing_info) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } }; struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !pairing_info) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } pairing_info_in.header.api_version = HDCP_API_VERSION; pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO; pairing_info_in.header.status = FW_HDCP_STATUS_SUCCESS; pairing_info_in.header.buffer_len = WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN; pairing_info_in.port.integrated_port_type = data->port_type; pairing_info_in.port.physical_port = (u8)data->hdcp_ddi; pairing_info_in.port.attached_transcoder = (u8)data->hdcp_transcoder; memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km, HDCP_2_2_E_KH_KM_LEN); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&pairing_info_in, sizeof(pairing_info_in), (u8 *)&pairing_info_out, sizeof(pairing_info_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (pairing_info_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. Status: 0x%X\n", WIRED_AKE_SEND_PAIRING_INFO, pairing_info_out.header.status); return -EIO; } return 0; #endif } static int gsc_hdcp_initiate_locality_check(struct device *dev, struct hdcp_port_data *data, struct hdcp2_lc_init *lc_init_data) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } }; struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !lc_init_data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } lc_init_in.header.api_version = HDCP_API_VERSION; lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK; lc_init_in.header.status = FW_HDCP_STATUS_SUCCESS; lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN; lc_init_in.port.integrated_port_type = data->port_type; lc_init_in.port.physical_port = (u8)data->hdcp_ddi; lc_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder; byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&lc_init_in, sizeof(lc_init_in), (u8 *)&lc_init_out, sizeof(lc_init_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (lc_init_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X Failed. status: 0x%X\n", WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status); return -EIO; } lc_init_data->msg_id = HDCP_2_2_LC_INIT; memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN); return 0; #endif } static int gsc_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data, struct hdcp2_lc_send_lprime *rx_lprime) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } }; struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !rx_lprime) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } verify_lprime_in.header.api_version = HDCP_API_VERSION; verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY; verify_lprime_in.header.status = FW_HDCP_STATUS_SUCCESS; verify_lprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN; verify_lprime_in.port.integrated_port_type = data->port_type; verify_lprime_in.port.physical_port = (u8)data->hdcp_ddi; verify_lprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder; memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime, HDCP_2_2_L_PRIME_LEN); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_lprime_in, sizeof(verify_lprime_in), (u8 *)&verify_lprime_out, sizeof(verify_lprime_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (verify_lprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", WIRED_VALIDATE_LOCALITY, verify_lprime_out.header.status); return -EIO; } return 0; #endif } static int gsc_hdcp_get_session_key(struct device *dev, struct hdcp_port_data *data, struct hdcp2_ske_send_eks *ske_data) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_get_session_key_in get_skey_in = { { 0 } }; struct wired_cmd_get_session_key_out get_skey_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data || !ske_data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } get_skey_in.header.api_version = HDCP_API_VERSION; get_skey_in.header.command_id = WIRED_GET_SESSION_KEY; get_skey_in.header.status = FW_HDCP_STATUS_SUCCESS; get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN; get_skey_in.port.integrated_port_type = data->port_type; get_skey_in.port.physical_port = (u8)data->hdcp_ddi; get_skey_in.port.attached_transcoder = (u8)data->hdcp_transcoder; byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&get_skey_in, sizeof(get_skey_in), (u8 *)&get_skey_out, sizeof(get_skey_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (get_skey_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", WIRED_GET_SESSION_KEY, get_skey_out.header.status); return -EIO; } ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS; memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks, HDCP_2_2_E_DKEY_KS_LEN); memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN); return 0; #endif } static int gsc_hdcp_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) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } }; struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !rep_topology || !rep_send_ack || !data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } verify_repeater_in.header.api_version = HDCP_API_VERSION; verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER; verify_repeater_in.header.status = FW_HDCP_STATUS_SUCCESS; verify_repeater_in.header.buffer_len = WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN; verify_repeater_in.port.integrated_port_type = data->port_type; verify_repeater_in.port.physical_port = (u8)data->hdcp_ddi; verify_repeater_in.port.attached_transcoder = (u8)data->hdcp_transcoder; memcpy(verify_repeater_in.rx_info, rep_topology->rx_info, HDCP_2_2_RXINFO_LEN); memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v, HDCP_2_2_SEQ_NUM_LEN); memcpy(verify_repeater_in.v_prime, rep_topology->v_prime, HDCP_2_2_V_PRIME_HALF_LEN); memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids, HDCP_2_2_RECEIVER_IDS_MAX_LEN); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&verify_repeater_in, sizeof(verify_repeater_in), (u8 *)&verify_repeater_out, sizeof(verify_repeater_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (verify_repeater_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", WIRED_VERIFY_REPEATER, verify_repeater_out.header.status); return -EIO; } memcpy(rep_send_ack->v, verify_repeater_out.v, HDCP_2_2_V_PRIME_HALF_LEN); rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK; return 0; #endif } static int gsc_hdcp_verify_mprime(struct device *dev, struct hdcp_port_data *data, struct hdcp2_rep_stream_ready *stream_ready) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_repeater_auth_stream_req_in *verify_mprime_in; struct wired_cmd_repeater_auth_stream_req_out verify_mprime_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; size_t cmd_size; if (!dev || !stream_ready || !data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } cmd_size = struct_size(verify_mprime_in, streams, data->k); if (cmd_size == SIZE_MAX) return -EINVAL; verify_mprime_in = kzalloc(cmd_size, GFP_KERNEL); if (!verify_mprime_in) return -ENOMEM; verify_mprime_in->header.api_version = HDCP_API_VERSION; verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ; verify_mprime_in->header.status = FW_HDCP_STATUS_SUCCESS; verify_mprime_in->header.buffer_len = cmd_size - sizeof(verify_mprime_in->header); verify_mprime_in->port.integrated_port_type = data->port_type; verify_mprime_in->port.physical_port = (u8)data->hdcp_ddi; verify_mprime_in->port.attached_transcoder = (u8)data->hdcp_transcoder; memcpy(verify_mprime_in->m_prime, stream_ready->m_prime, HDCP_2_2_MPRIME_LEN); drm_hdcp_cpu_to_be24(verify_mprime_in->seq_num_m, data->seq_num_m); memcpy(verify_mprime_in->streams, data->streams, array_size(data->k, sizeof(*data->streams))); verify_mprime_in->k = cpu_to_be16(data->k); byte = intel_hdcp_gsc_msg_send(i915, (u8 *)verify_mprime_in, cmd_size, (u8 *)&verify_mprime_out, sizeof(verify_mprime_out)); kfree(verify_mprime_in); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (verify_mprime_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", WIRED_REPEATER_AUTH_STREAM_REQ, verify_mprime_out.header.status); return -EIO; } return 0; #endif } static int gsc_hdcp_enable_authentication(struct device *dev, struct hdcp_port_data *data) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } }; struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } enable_auth_in.header.api_version = HDCP_API_VERSION; enable_auth_in.header.command_id = WIRED_ENABLE_AUTH; enable_auth_in.header.status = FW_HDCP_STATUS_SUCCESS; enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN; enable_auth_in.port.integrated_port_type = data->port_type; enable_auth_in.port.physical_port = (u8)data->hdcp_ddi; enable_auth_in.port.attached_transcoder = (u8)data->hdcp_transcoder; enable_auth_in.stream_type = data->streams[0].stream_type; byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&enable_auth_in, sizeof(enable_auth_in), (u8 *)&enable_auth_out, sizeof(enable_auth_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (enable_auth_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "FW cmd 0x%08X failed. status: 0x%X\n", WIRED_ENABLE_AUTH, enable_auth_out.header.status); return -EIO; } return 0; #endif } static int gsc_hdcp_close_session(struct device *dev, struct hdcp_port_data *data) { STUB(); return -ENOSYS; #ifdef notyet struct wired_cmd_close_session_in session_close_in = { { 0 } }; struct wired_cmd_close_session_out session_close_out = { { 0 } }; struct drm_i915_private *i915; ssize_t byte; if (!dev || !data) return -EINVAL; i915 = kdev_to_i915(dev); if (!i915) { dev_err(dev, "DRM not initialized, aborting HDCP.\n"); return -ENODEV; } session_close_in.header.api_version = HDCP_API_VERSION; session_close_in.header.command_id = WIRED_CLOSE_SESSION; session_close_in.header.status = FW_HDCP_STATUS_SUCCESS; session_close_in.header.buffer_len = WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN; session_close_in.port.integrated_port_type = data->port_type; session_close_in.port.physical_port = (u8)data->hdcp_ddi; session_close_in.port.attached_transcoder = (u8)data->hdcp_transcoder; byte = intel_hdcp_gsc_msg_send(i915, (u8 *)&session_close_in, sizeof(session_close_in), (u8 *)&session_close_out, sizeof(session_close_out)); if (byte < 0) { drm_dbg_kms(&i915->drm, "intel_hdcp_gsc_msg_send failed. %zd\n", byte); return byte; } if (session_close_out.header.status != FW_HDCP_STATUS_SUCCESS) { drm_dbg_kms(&i915->drm, "Session Close Failed. status: 0x%X\n", session_close_out.header.status); return -EIO; } return 0; #endif } static const struct i915_hdcp_ops gsc_hdcp_ops = { .initiate_hdcp2_session = gsc_hdcp_initiate_session, .verify_receiver_cert_prepare_km = gsc_hdcp_verify_receiver_cert_prepare_km, .verify_hprime = gsc_hdcp_verify_hprime, .store_pairing_info = gsc_hdcp_store_pairing_info, .initiate_locality_check = gsc_hdcp_initiate_locality_check, .verify_lprime = gsc_hdcp_verify_lprime, .get_session_key = gsc_hdcp_get_session_key, .repeater_check_flow_prepare_ack = gsc_hdcp_repeater_check_flow_prepare_ack, .verify_mprime = gsc_hdcp_verify_mprime, .enable_hdcp_authentication = gsc_hdcp_enable_authentication, .close_hdcp_session = gsc_hdcp_close_session, }; /*This function helps allocate memory for the command that we will send to gsc cs */ static int intel_hdcp_gsc_initialize_message(struct drm_i915_private *i915, struct intel_hdcp_gsc_message *hdcp_message) { struct intel_gt *gt = i915->media_gt; struct drm_i915_gem_object *obj = NULL; struct i915_vma *vma = NULL; void *cmd_in, *cmd_out; int err; /* allocate object of two page for HDCP command memory and store it */ obj = i915_gem_object_create_shmem(i915, 2 * PAGE_SIZE); if (IS_ERR(obj)) { drm_err(&i915->drm, "Failed to allocate HDCP streaming command!\n"); return PTR_ERR(obj); } cmd_in = i915_gem_object_pin_map_unlocked(obj, intel_gt_coherent_map_type(gt, obj, true)); if (IS_ERR(cmd_in)) { drm_err(&i915->drm, "Failed to map gsc message page!\n"); err = PTR_ERR(cmd_in); goto out_unpin; } cmd_out = cmd_in + PAGE_SIZE; vma = i915_vma_instance(obj, >->ggtt->vm, NULL); if (IS_ERR(vma)) { err = PTR_ERR(vma); goto out_unmap; } err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); if (err) goto out_unmap; memset(cmd_in, 0, obj->base.size); hdcp_message->hdcp_cmd_in = cmd_in; hdcp_message->hdcp_cmd_out = cmd_out; hdcp_message->vma = vma; return 0; out_unmap: i915_gem_object_unpin_map(obj); out_unpin: i915_gem_object_put(obj); return err; } static int intel_hdcp_gsc_hdcp2_init(struct drm_i915_private *i915) { struct intel_hdcp_gsc_message *hdcp_message; int ret; hdcp_message = kzalloc(sizeof(*hdcp_message), GFP_KERNEL); if (!hdcp_message) return -ENOMEM; /* * NOTE: No need to lock the comp mutex here as it is already * going to be taken before this function called */ i915->display.hdcp.hdcp_message = hdcp_message; ret = intel_hdcp_gsc_initialize_message(i915, hdcp_message); if (ret) drm_err(&i915->drm, "Could not initialize hdcp_message\n"); return ret; } static void intel_hdcp_gsc_free_message(struct drm_i915_private *i915) { struct intel_hdcp_gsc_message *hdcp_message = i915->display.hdcp.hdcp_message; hdcp_message->hdcp_cmd_in = NULL; hdcp_message->hdcp_cmd_out = NULL; i915_vma_unpin_and_release(&hdcp_message->vma, I915_VMA_RELEASE_MAP); kfree(hdcp_message); } int intel_hdcp_gsc_init(struct drm_i915_private *i915) { struct i915_hdcp_arbiter *data; int ret; data = kzalloc(sizeof(struct i915_hdcp_arbiter), GFP_KERNEL); if (!data) return -ENOMEM; mutex_lock(&i915->display.hdcp.hdcp_mutex); i915->display.hdcp.arbiter = data; i915->display.hdcp.arbiter->hdcp_dev = i915->drm.dev; i915->display.hdcp.arbiter->ops = &gsc_hdcp_ops; ret = intel_hdcp_gsc_hdcp2_init(i915); mutex_unlock(&i915->display.hdcp.hdcp_mutex); return ret; } void intel_hdcp_gsc_fini(struct drm_i915_private *i915) { intel_hdcp_gsc_free_message(i915); kfree(i915->display.hdcp.arbiter); } static int intel_gsc_send_sync(struct drm_i915_private *i915, struct intel_gsc_mtl_header *header_in, struct intel_gsc_mtl_header *header_out, u64 addr_in, u64 addr_out, size_t msg_out_len) { struct intel_gt *gt = i915->media_gt; int ret; ret = intel_gsc_uc_heci_cmd_submit_packet(>->uc.gsc, addr_in, header_in->message_size, addr_out, msg_out_len + sizeof(*header_out)); if (ret) { drm_err(&i915->drm, "failed to send gsc HDCP msg (%d)\n", ret); return ret; } /* * Checking validity marker and header status to see if some error has * blocked us from sending message to gsc cs */ if (header_out->validity_marker != GSC_HECI_VALIDITY_MARKER) { drm_err(&i915->drm, "invalid validity marker\n"); return -EINVAL; } if (header_out->status != 0) { drm_err(&i915->drm, "header status indicates error %d\n", header_out->status); return -EINVAL; } if (header_out->flags & GSC_OUTFLAG_MSG_PENDING) { header_in->gsc_message_handle = header_out->gsc_message_handle; return -EAGAIN; } return 0; } /* * This function can now be used for sending requests and will also handle * receipt of reply messages hence no different function of message retrieval * is required. We will initialize intel_hdcp_gsc_message structure then add * gsc cs memory header as stated in specs after which the normal HDCP payload * will follow */ ssize_t intel_hdcp_gsc_msg_send(struct drm_i915_private *i915, u8 *msg_in, size_t msg_in_len, u8 *msg_out, size_t msg_out_len) { struct intel_gt *gt = i915->media_gt; struct intel_gsc_mtl_header *header_in, *header_out; const size_t max_msg_size = PAGE_SIZE - sizeof(*header_in); struct intel_hdcp_gsc_message *hdcp_message; u64 addr_in, addr_out, host_session_id; u32 reply_size, msg_size_in, msg_size_out; int ret, tries = 0; if (!intel_uc_uses_gsc_uc(>->uc)) return -ENODEV; if (msg_in_len > max_msg_size || msg_out_len > max_msg_size) return -ENOSPC; msg_size_in = msg_in_len + sizeof(*header_in); msg_size_out = msg_out_len + sizeof(*header_out); hdcp_message = i915->display.hdcp.hdcp_message; header_in = hdcp_message->hdcp_cmd_in; header_out = hdcp_message->hdcp_cmd_out; addr_in = i915_ggtt_offset(hdcp_message->vma); addr_out = addr_in + PAGE_SIZE; memset(header_in, 0, msg_size_in); memset(header_out, 0, msg_size_out); get_random_bytes(&host_session_id, sizeof(u64)); intel_gsc_uc_heci_cmd_emit_mtl_header(header_in, HECI_MEADDRESS_HDCP, msg_size_in, host_session_id); memcpy(hdcp_message->hdcp_cmd_in + sizeof(*header_in), msg_in, msg_in_len); /* * Keep sending request in case the pending bit is set no need to add * message handle as we are using same address hence loc. of header is * same and it will contain the message handle. we will send the message * 20 times each message 50 ms apart */ do { ret = intel_gsc_send_sync(i915, header_in, header_out, addr_in, addr_out, msg_out_len); /* Only try again if gsc says so */ if (ret != -EAGAIN) break; drm_msleep(50); } while (++tries < 20); if (ret) goto err; /* we use the same mem for the reply, so header is in the same loc */ reply_size = header_out->message_size - sizeof(*header_out); if (reply_size > msg_out_len) { drm_warn(&i915->drm, "caller with insufficient HDCP reply size %u (%d)\n", reply_size, (u32)msg_out_len); reply_size = msg_out_len; } else if (reply_size != msg_out_len) { drm_dbg_kms(&i915->drm, "caller unexpected HCDP reply size %u (%d)\n", reply_size, (u32)msg_out_len); } memcpy(msg_out, hdcp_message->hdcp_cmd_out + sizeof(*header_out), msg_out_len); err: return ret; }