1 // SPDX-License-Identifier: GPL-2.0
5  * mei_hdcp.c: HDCP client driver for mei bus
14  * The mei_hdcp driver acts as a translation layer between HDCP 2.2
32  * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
34  * @data: Intel HW specific hdcp data
50 		return -EINVAL;  in mei_hdcp_initiate_session()
60 	session_init_in.port.integrated_port_type = data->port_type;  in mei_hdcp_initiate_session()
61 	session_init_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_initiate_session()
62 	session_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_initiate_session()
63 	session_init_in.protocol = data->protocol;  in mei_hdcp_initiate_session()
83 		return -EIO;  in mei_hdcp_initiate_session()
86 	ake_data->msg_id = HDCP_2_2_AKE_INIT;  in mei_hdcp_initiate_session()
87 	ake_data->tx_caps = session_init_out.tx_caps;  in mei_hdcp_initiate_session()
88 	memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN);  in mei_hdcp_initiate_session()
94  * mei_hdcp_verify_receiver_cert_prepare_km() - Verify the Receiver Certificate
97  * @data: Intel HW specific hdcp data
120 		return -EINVAL;  in mei_hdcp_verify_receiver_cert_prepare_km()
130 	verify_rxcert_in.port.integrated_port_type = data->port_type;  in mei_hdcp_verify_receiver_cert_prepare_km()
131 	verify_rxcert_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_verify_receiver_cert_prepare_km()
132 	verify_rxcert_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_verify_receiver_cert_prepare_km()
134 	verify_rxcert_in.cert_rx = rx_cert->cert_rx;  in mei_hdcp_verify_receiver_cert_prepare_km()
135 	memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);  in mei_hdcp_verify_receiver_cert_prepare_km()
136 	memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN);  in mei_hdcp_verify_receiver_cert_prepare_km()
156 		return -EIO;  in mei_hdcp_verify_receiver_cert_prepare_km()
161 		ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM;  in mei_hdcp_verify_receiver_cert_prepare_km()
164 		ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM;  in mei_hdcp_verify_receiver_cert_prepare_km()
168 	memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff,  in mei_hdcp_verify_receiver_cert_prepare_km()
175  * mei_hdcp_verify_hprime() - Verify AKE_Send_H_prime at ME FW.
177  * @data: Intel HW specific hdcp data
192 		return -EINVAL;  in mei_hdcp_verify_hprime()
201 	send_hprime_in.port.integrated_port_type = data->port_type;  in mei_hdcp_verify_hprime()
202 	send_hprime_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_verify_hprime()
203 	send_hprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_verify_hprime()
205 	memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,  in mei_hdcp_verify_hprime()
225 		return -EIO;  in mei_hdcp_verify_hprime()
232  * mei_hdcp_store_pairing_info() - Store pairing info received at ME FW
234  * @data: Intel HW specific hdcp data
249 		return -EINVAL;  in mei_hdcp_store_pairing_info()
259 	pairing_info_in.port.integrated_port_type = data->port_type;  in mei_hdcp_store_pairing_info()
260 	pairing_info_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_store_pairing_info()
261 	pairing_info_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_store_pairing_info()
263 	memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,  in mei_hdcp_store_pairing_info()
284 		return -EIO;  in mei_hdcp_store_pairing_info()
291  * mei_hdcp_initiate_locality_check() - Prepare LC_Init
293  * @data: Intel HW specific hdcp data
309 		return -EINVAL;  in mei_hdcp_initiate_locality_check()
318 	lc_init_in.port.integrated_port_type = data->port_type;  in mei_hdcp_initiate_locality_check()
319 	lc_init_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_initiate_locality_check()
320 	lc_init_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_initiate_locality_check()
337 		return -EIO;  in mei_hdcp_initiate_locality_check()
340 	lc_init_data->msg_id = HDCP_2_2_LC_INIT;  in mei_hdcp_initiate_locality_check()
341 	memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN);  in mei_hdcp_initiate_locality_check()
347  * mei_hdcp_verify_lprime() - Verify lprime.
349  * @data: Intel HW specific hdcp data
364 		return -EINVAL;  in mei_hdcp_verify_lprime()
374 	verify_lprime_in.port.integrated_port_type = data->port_type;  in mei_hdcp_verify_lprime()
375 	verify_lprime_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_verify_lprime()
376 	verify_lprime_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_verify_lprime()
378 	memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,  in mei_hdcp_verify_lprime()
399 		return -EIO;  in mei_hdcp_verify_lprime()
406  * mei_hdcp_get_session_key() - Prepare SKE_Send_Eks.
408  * @data: Intel HW specific hdcp data
423 		return -EINVAL;  in mei_hdcp_get_session_key()
432 	get_skey_in.port.integrated_port_type = data->port_type;  in mei_hdcp_get_session_key()
433 	get_skey_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_get_session_key()
434 	get_skey_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_get_session_key()
452 		return -EIO;  in mei_hdcp_get_session_key()
455 	ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;  in mei_hdcp_get_session_key()
456 	memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,  in mei_hdcp_get_session_key()
458 	memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);  in mei_hdcp_get_session_key()
464  * mei_hdcp_repeater_check_flow_prepare_ack() - Validate the Downstream topology
467  * @data: Intel HW specific hdcp data
487 		return -EINVAL;  in mei_hdcp_repeater_check_flow_prepare_ack()
497 	verify_repeater_in.port.integrated_port_type = data->port_type;  in mei_hdcp_repeater_check_flow_prepare_ack()
498 	verify_repeater_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_repeater_check_flow_prepare_ack()
499 	verify_repeater_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_repeater_check_flow_prepare_ack()
501 	memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,  in mei_hdcp_repeater_check_flow_prepare_ack()
503 	memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v,  in mei_hdcp_repeater_check_flow_prepare_ack()
505 	memcpy(verify_repeater_in.v_prime, rep_topology->v_prime,  in mei_hdcp_repeater_check_flow_prepare_ack()
507 	memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids,  in mei_hdcp_repeater_check_flow_prepare_ack()
528 		return -EIO;  in mei_hdcp_repeater_check_flow_prepare_ack()
531 	memcpy(rep_send_ack->v, verify_repeater_out.v,  in mei_hdcp_repeater_check_flow_prepare_ack()
533 	rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK;  in mei_hdcp_repeater_check_flow_prepare_ack()
539  * mei_hdcp_verify_mprime() - Verify mprime.
541  * @data: Intel HW specific hdcp data
558 		return -EINVAL;  in mei_hdcp_verify_mprime()
562 	cmd_size = struct_size(verify_mprime_in, streams, data->k);  in mei_hdcp_verify_mprime()
564 		return -EINVAL;  in mei_hdcp_verify_mprime()
568 		return -ENOMEM;  in mei_hdcp_verify_mprime()
570 	verify_mprime_in->header.api_version = HDCP_API_VERSION;  in mei_hdcp_verify_mprime()
571 	verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;  in mei_hdcp_verify_mprime()
572 	verify_mprime_in->header.status = FW_HDCP_STATUS_SUCCESS;  in mei_hdcp_verify_mprime()
573 	verify_mprime_in->header.buffer_len = cmd_size  - sizeof(verify_mprime_in->header);  in mei_hdcp_verify_mprime()
575 	verify_mprime_in->port.integrated_port_type = data->port_type;  in mei_hdcp_verify_mprime()
576 	verify_mprime_in->port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_verify_mprime()
577 	verify_mprime_in->port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_verify_mprime()
579 	memcpy(verify_mprime_in->m_prime, stream_ready->m_prime, HDCP_2_2_MPRIME_LEN);  in mei_hdcp_verify_mprime()
580 	drm_hdcp_cpu_to_be24(verify_mprime_in->seq_num_m, data->seq_num_m);  in mei_hdcp_verify_mprime()
582 	memcpy(verify_mprime_in->streams, data->streams,  in mei_hdcp_verify_mprime()
583 	       array_size(data->k, sizeof(*data->streams)));  in mei_hdcp_verify_mprime()
585 	verify_mprime_in->k = cpu_to_be16(data->k);  in mei_hdcp_verify_mprime()
605 		return -EIO;  in mei_hdcp_verify_mprime()
612  * mei_hdcp_enable_authentication() - Mark a port as authenticated
615  * @data: Intel HW specific hdcp data
628 		return -EINVAL;  in mei_hdcp_enable_authentication()
637 	enable_auth_in.port.integrated_port_type = data->port_type;  in mei_hdcp_enable_authentication()
638 	enable_auth_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_enable_authentication()
639 	enable_auth_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_enable_authentication()
640 	enable_auth_in.stream_type = data->streams[0].stream_type;  in mei_hdcp_enable_authentication()
659 		return -EIO;  in mei_hdcp_enable_authentication()
666  * mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
669  * @data: Intel HW specific hdcp data
682 		return -EINVAL;  in mei_hdcp_close_session()
692 	session_close_in.port.integrated_port_type = data->port_type;  in mei_hdcp_close_session()
693 	session_close_in.port.physical_port = (u8)data->hdcp_ddi;  in mei_hdcp_close_session()
694 	session_close_in.port.attached_transcoder = (u8)data->hdcp_transcoder;  in mei_hdcp_close_session()
713 		return -EIO;  in mei_hdcp_close_session()
743 	comp_arbiter->ops = &mei_hdcp_ops;  in mei_component_master_bind()
744 	comp_arbiter->hdcp_dev = dev;  in mei_component_master_bind()
767  * mei_hdcp_component_match - compare function for matching mei hdcp.
769  *    The function checks if the driver is i915, the subcomponent is HDCP
770  *    and the grand parent of hdcp and the parent of i915 are the same
775  * @data: compare data (mei hdcp device)
778  * * 1 - if components match
779  * * 0 - otherwise
792 	if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8) ||  in mei_hdcp_component_match()
793 	    pdev->vendor != PCI_VENDOR_ID_INTEL)  in mei_hdcp_component_match()
799 	base = base->parent;  in mei_hdcp_component_match()
803 	base = base->parent;  in mei_hdcp_component_match()
804 	dev = dev->parent;  in mei_hdcp_component_match()
818 		dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);  in mei_hdcp_probe()
824 		ret = -ENOMEM;  in mei_hdcp_probe()
829 	component_match_add_typed(&cldev->dev, &master_match,  in mei_hdcp_probe()
830 				  mei_hdcp_component_match, &cldev->dev);  in mei_hdcp_probe()
832 		ret = -ENOMEM;  in mei_hdcp_probe()
837 	ret = component_master_add_with_match(&cldev->dev,  in mei_hdcp_probe()
841 		dev_err(&cldev->dev, "Master comp add failed %d\n", ret);  in mei_hdcp_probe()
860 	component_master_del(&cldev->dev, &mei_component_master_ops);  in mei_hdcp_remove()
866 		dev_warn(&cldev->dev, "mei_cldev_disable() failed\n");  in mei_hdcp_remove()
889 MODULE_DESCRIPTION("MEI HDCP");