1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright © 2019 Intel Corporation
5 * Mei_hdcp.c: HDCP client driver for mei bus
8 * Ramalingam C <ramalingam.c@intel.com>
12 * DOC: MEI_HDCP Client Driver
14 * This is a client driver to the mei_bus to make the HDCP2.2 services of
15 * ME FW available for the interested consumers like I915.
17 * This module will act as a translation layer between HDCP protocol
18 * implementor(I915) and ME FW by translating HDCP2.2 authentication
19 * messages to ME FW command payloads and vice versa.
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/uuid.h>
25 #include <linux/mei_cl_bus.h>
26 #include <linux/component.h>
27 #include <drm/drm_connector.h>
28 #include <drm/i915_component.h>
29 #include <drm/i915_mei_hdcp_interface.h>
33 static inline u8 mei_get_ddi_index(enum port port)
38 case PORT_B ... PORT_F:
41 return MEI_DDI_INVALID_PORT;
46 * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
47 * @dev: device corresponding to the mei_cl_device
48 * @data: Intel HW specific hdcp data
49 * @ake_data: AKE_Init msg output.
51 * Return: 0 on Success, <0 on Failure.
54 mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
55 struct hdcp2_ake_init *ake_data)
57 struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
58 struct wired_cmd_initiate_hdcp2_session_out
59 session_init_out = { { 0 } };
60 struct mei_cl_device *cldev;
63 if (!dev || !data || !ake_data)
66 cldev = to_mei_cl_device(dev);
68 session_init_in.header.api_version = HDCP_API_VERSION;
69 session_init_in.header.command_id = WIRED_INITIATE_HDCP2_SESSION;
70 session_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
71 session_init_in.header.buffer_len =
72 WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN;
74 session_init_in.port.integrated_port_type = data->port_type;
75 session_init_in.port.physical_port = mei_get_ddi_index(data->port);
76 session_init_in.protocol = data->protocol;
78 byte = mei_cldev_send(cldev, (u8 *)&session_init_in,
79 sizeof(session_init_in));
81 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
85 byte = mei_cldev_recv(cldev, (u8 *)&session_init_out,
86 sizeof(session_init_out));
88 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
92 if (session_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
93 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
94 WIRED_INITIATE_HDCP2_SESSION,
95 session_init_out.header.status);
99 ake_data->msg_id = HDCP_2_2_AKE_INIT;
100 ake_data->tx_caps = session_init_out.tx_caps;
101 memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN);
107 * mei_hdcp_verify_receiver_cert_prepare_km() - Verify the Receiver Certificate
108 * AKE_Send_Cert and prepare AKE_Stored_Km/AKE_No_Stored_Km
109 * @dev: device corresponding to the mei_cl_device
110 * @data: Intel HW specific hdcp data
111 * @rx_cert: AKE_Send_Cert for verification
112 * @km_stored: Pairing status flag output
113 * @ek_pub_km: AKE_Stored_Km/AKE_No_Stored_Km output msg
114 * @msg_sz : size of AKE_XXXXX_Km output msg
116 * Return: 0 on Success, <0 on Failure
119 mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
120 struct hdcp_port_data *data,
121 struct hdcp2_ake_send_cert *rx_cert,
123 struct hdcp2_ake_no_stored_km
127 struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = { { 0 } };
128 struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = { { 0 } };
129 struct mei_cl_device *cldev;
132 if (!dev || !data || !rx_cert || !km_stored || !ek_pub_km || !msg_sz)
135 cldev = to_mei_cl_device(dev);
137 verify_rxcert_in.header.api_version = HDCP_API_VERSION;
138 verify_rxcert_in.header.command_id = WIRED_VERIFY_RECEIVER_CERT;
139 verify_rxcert_in.header.status = ME_HDCP_STATUS_SUCCESS;
140 verify_rxcert_in.header.buffer_len =
141 WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN;
143 verify_rxcert_in.port.integrated_port_type = data->port_type;
144 verify_rxcert_in.port.physical_port = mei_get_ddi_index(data->port);
146 verify_rxcert_in.cert_rx = rx_cert->cert_rx;
147 memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);
148 memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN);
150 byte = mei_cldev_send(cldev, (u8 *)&verify_rxcert_in,
151 sizeof(verify_rxcert_in));
153 dev_dbg(dev, "mei_cldev_send failed: %zd\n", byte);
157 byte = mei_cldev_recv(cldev, (u8 *)&verify_rxcert_out,
158 sizeof(verify_rxcert_out));
160 dev_dbg(dev, "mei_cldev_recv failed: %zd\n", byte);
164 if (verify_rxcert_out.header.status != ME_HDCP_STATUS_SUCCESS) {
165 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
166 WIRED_VERIFY_RECEIVER_CERT,
167 verify_rxcert_out.header.status);
171 *km_stored = !!verify_rxcert_out.km_stored;
172 if (verify_rxcert_out.km_stored) {
173 ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM;
174 *msg_sz = sizeof(struct hdcp2_ake_stored_km);
176 ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM;
177 *msg_sz = sizeof(struct hdcp2_ake_no_stored_km);
180 memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff,
181 sizeof(verify_rxcert_out.ekm_buff));
187 * mei_hdcp_verify_hprime() - Verify AKE_Send_H_prime at ME FW.
188 * @dev: device corresponding to the mei_cl_device
189 * @data: Intel HW specific hdcp data
190 * @rx_hprime: AKE_Send_H_prime msg for ME FW verification
192 * Return: 0 on Success, <0 on Failure
195 mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
196 struct hdcp2_ake_send_hprime *rx_hprime)
198 struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } };
199 struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } };
200 struct mei_cl_device *cldev;
203 if (!dev || !data || !rx_hprime)
206 cldev = to_mei_cl_device(dev);
208 send_hprime_in.header.api_version = HDCP_API_VERSION;
209 send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME;
210 send_hprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
211 send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN;
213 send_hprime_in.port.integrated_port_type = data->port_type;
214 send_hprime_in.port.physical_port = mei_get_ddi_index(data->port);
216 memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
217 HDCP_2_2_H_PRIME_LEN);
219 byte = mei_cldev_send(cldev, (u8 *)&send_hprime_in,
220 sizeof(send_hprime_in));
222 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
226 byte = mei_cldev_recv(cldev, (u8 *)&send_hprime_out,
227 sizeof(send_hprime_out));
229 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
233 if (send_hprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
234 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
235 WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status);
243 * mei_hdcp_store_pairing_info() - Store pairing info received at ME FW
244 * @dev: device corresponding to the mei_cl_device
245 * @data: Intel HW specific hdcp data
246 * @pairing_info: AKE_Send_Pairing_Info msg input to ME FW
248 * Return: 0 on Success, <0 on Failure
251 mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
252 struct hdcp2_ake_send_pairing_info *pairing_info)
254 struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
255 struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
256 struct mei_cl_device *cldev;
259 if (!dev || !data || !pairing_info)
262 cldev = to_mei_cl_device(dev);
264 pairing_info_in.header.api_version = HDCP_API_VERSION;
265 pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO;
266 pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS;
267 pairing_info_in.header.buffer_len =
268 WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN;
270 pairing_info_in.port.integrated_port_type = data->port_type;
271 pairing_info_in.port.physical_port = mei_get_ddi_index(data->port);
273 memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
274 HDCP_2_2_E_KH_KM_LEN);
276 byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in,
277 sizeof(pairing_info_in));
279 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
283 byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out,
284 sizeof(pairing_info_out));
286 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
290 if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) {
291 dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n",
292 WIRED_AKE_SEND_PAIRING_INFO,
293 pairing_info_out.header.status);
301 * mei_hdcp_initiate_locality_check() - Prepare LC_Init
302 * @dev: device corresponding to the mei_cl_device
303 * @data: Intel HW specific hdcp data
304 * @lc_init_data: LC_Init msg output
306 * Return: 0 on Success, <0 on Failure
309 mei_hdcp_initiate_locality_check(struct device *dev,
310 struct hdcp_port_data *data,
311 struct hdcp2_lc_init *lc_init_data)
313 struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } };
314 struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } };
315 struct mei_cl_device *cldev;
318 if (!dev || !data || !lc_init_data)
321 cldev = to_mei_cl_device(dev);
323 lc_init_in.header.api_version = HDCP_API_VERSION;
324 lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK;
325 lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
326 lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN;
328 lc_init_in.port.integrated_port_type = data->port_type;
329 lc_init_in.port.physical_port = mei_get_ddi_index(data->port);
331 byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
333 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
337 byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out));
339 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
343 if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
344 dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n",
345 WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status);
349 lc_init_data->msg_id = HDCP_2_2_LC_INIT;
350 memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN);
356 * mei_hdcp_verify_lprime() - Verify lprime.
357 * @dev: device corresponding to the mei_cl_device
358 * @data: Intel HW specific hdcp data
359 * @rx_lprime: LC_Send_L_prime msg for ME FW verification
361 * Return: 0 on Success, <0 on Failure
364 mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data,
365 struct hdcp2_lc_send_lprime *rx_lprime)
367 struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } };
368 struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } };
369 struct mei_cl_device *cldev;
372 if (!dev || !data || !rx_lprime)
375 cldev = to_mei_cl_device(dev);
377 verify_lprime_in.header.api_version = HDCP_API_VERSION;
378 verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY;
379 verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
380 verify_lprime_in.header.buffer_len =
381 WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN;
383 verify_lprime_in.port.integrated_port_type = data->port_type;
384 verify_lprime_in.port.physical_port = mei_get_ddi_index(data->port);
386 memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,
387 HDCP_2_2_L_PRIME_LEN);
389 byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in,
390 sizeof(verify_lprime_in));
392 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
396 byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out,
397 sizeof(verify_lprime_out));
399 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
403 if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
404 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
405 WIRED_VALIDATE_LOCALITY,
406 verify_lprime_out.header.status);
414 * mei_hdcp_get_session_key() - Prepare SKE_Send_Eks.
415 * @dev: device corresponding to the mei_cl_device
416 * @data: Intel HW specific hdcp data
417 * @ske_data: SKE_Send_Eks msg output from ME FW.
419 * Return: 0 on Success, <0 on Failure
421 static int mei_hdcp_get_session_key(struct device *dev,
422 struct hdcp_port_data *data,
423 struct hdcp2_ske_send_eks *ske_data)
425 struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
426 struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
427 struct mei_cl_device *cldev;
430 if (!dev || !data || !ske_data)
433 cldev = to_mei_cl_device(dev);
435 get_skey_in.header.api_version = HDCP_API_VERSION;
436 get_skey_in.header.command_id = WIRED_GET_SESSION_KEY;
437 get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS;
438 get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN;
440 get_skey_in.port.integrated_port_type = data->port_type;
441 get_skey_in.port.physical_port = mei_get_ddi_index(data->port);
443 byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
445 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
449 byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, sizeof(get_skey_out));
452 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
456 if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) {
457 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
458 WIRED_GET_SESSION_KEY, get_skey_out.header.status);
462 ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
463 memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
464 HDCP_2_2_E_DKEY_KS_LEN);
465 memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
471 * mei_hdcp_repeater_check_flow_prepare_ack() - Validate the Downstream topology
472 * and prepare rep_ack.
473 * @dev: device corresponding to the mei_cl_device
474 * @data: Intel HW specific hdcp data
475 * @rep_topology: Receiver ID List to be validated
476 * @rep_send_ack : repeater ack from ME FW.
478 * Return: 0 on Success, <0 on Failure
481 mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev,
482 struct hdcp_port_data *data,
483 struct hdcp2_rep_send_receiverid_list
485 struct hdcp2_rep_send_ack
488 struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } };
489 struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } };
490 struct mei_cl_device *cldev;
493 if (!dev || !rep_topology || !rep_send_ack || !data)
496 cldev = to_mei_cl_device(dev);
498 verify_repeater_in.header.api_version = HDCP_API_VERSION;
499 verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER;
500 verify_repeater_in.header.status = ME_HDCP_STATUS_SUCCESS;
501 verify_repeater_in.header.buffer_len =
502 WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN;
504 verify_repeater_in.port.integrated_port_type = data->port_type;
505 verify_repeater_in.port.physical_port = mei_get_ddi_index(data->port);
507 memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,
508 HDCP_2_2_RXINFO_LEN);
509 memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v,
510 HDCP_2_2_SEQ_NUM_LEN);
511 memcpy(verify_repeater_in.v_prime, rep_topology->v_prime,
512 HDCP_2_2_V_PRIME_HALF_LEN);
513 memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids,
514 HDCP_2_2_RECEIVER_IDS_MAX_LEN);
516 byte = mei_cldev_send(cldev, (u8 *)&verify_repeater_in,
517 sizeof(verify_repeater_in));
519 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
523 byte = mei_cldev_recv(cldev, (u8 *)&verify_repeater_out,
524 sizeof(verify_repeater_out));
526 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
530 if (verify_repeater_out.header.status != ME_HDCP_STATUS_SUCCESS) {
531 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
532 WIRED_VERIFY_REPEATER,
533 verify_repeater_out.header.status);
537 memcpy(rep_send_ack->v, verify_repeater_out.v,
538 HDCP_2_2_V_PRIME_HALF_LEN);
539 rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK;
545 * mei_hdcp_verify_mprime() - Verify mprime.
546 * @dev: device corresponding to the mei_cl_device
547 * @data: Intel HW specific hdcp data
548 * @stream_ready: RepeaterAuth_Stream_Ready msg for ME FW verification.
550 * Return: 0 on Success, <0 on Failure
552 static int mei_hdcp_verify_mprime(struct device *dev,
553 struct hdcp_port_data *data,
554 struct hdcp2_rep_stream_ready *stream_ready)
556 struct wired_cmd_repeater_auth_stream_req_in
557 verify_mprime_in = { { 0 } };
558 struct wired_cmd_repeater_auth_stream_req_out
559 verify_mprime_out = { { 0 } };
560 struct mei_cl_device *cldev;
563 if (!dev || !stream_ready || !data)
566 cldev = to_mei_cl_device(dev);
568 verify_mprime_in.header.api_version = HDCP_API_VERSION;
569 verify_mprime_in.header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
570 verify_mprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
571 verify_mprime_in.header.buffer_len =
572 WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
574 verify_mprime_in.port.integrated_port_type = data->port_type;
575 verify_mprime_in.port.physical_port = mei_get_ddi_index(data->port);
577 memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
578 HDCP_2_2_MPRIME_LEN);
579 drm_hdcp2_u32_to_seq_num(verify_mprime_in.seq_num_m, data->seq_num_m);
580 memcpy(verify_mprime_in.streams, data->streams,
581 (data->k * sizeof(struct hdcp2_streamid_type)));
583 verify_mprime_in.k = cpu_to_be16(data->k);
585 byte = mei_cldev_send(cldev, (u8 *)&verify_mprime_in,
586 sizeof(verify_mprime_in));
588 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
592 byte = mei_cldev_recv(cldev, (u8 *)&verify_mprime_out,
593 sizeof(verify_mprime_out));
595 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
599 if (verify_mprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
600 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
601 WIRED_REPEATER_AUTH_STREAM_REQ,
602 verify_mprime_out.header.status);
610 * mei_hdcp_enable_authentication() - Mark a port as authenticated
612 * @dev: device corresponding to the mei_cl_device
613 * @data: Intel HW specific hdcp data
615 * Return: 0 on Success, <0 on Failure
617 static int mei_hdcp_enable_authentication(struct device *dev,
618 struct hdcp_port_data *data)
620 struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } };
621 struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } };
622 struct mei_cl_device *cldev;
628 cldev = to_mei_cl_device(dev);
630 enable_auth_in.header.api_version = HDCP_API_VERSION;
631 enable_auth_in.header.command_id = WIRED_ENABLE_AUTH;
632 enable_auth_in.header.status = ME_HDCP_STATUS_SUCCESS;
633 enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN;
635 enable_auth_in.port.integrated_port_type = data->port_type;
636 enable_auth_in.port.physical_port = mei_get_ddi_index(data->port);
637 enable_auth_in.stream_type = data->streams[0].stream_type;
639 byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in,
640 sizeof(enable_auth_in));
642 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
646 byte = mei_cldev_recv(cldev, (u8 *)&enable_auth_out,
647 sizeof(enable_auth_out));
649 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
653 if (enable_auth_out.header.status != ME_HDCP_STATUS_SUCCESS) {
654 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
655 WIRED_ENABLE_AUTH, enable_auth_out.header.status);
663 * mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
664 * This also disables the authenticated state of the port.
665 * @dev: device corresponding to the mei_cl_device
666 * @data: Intel HW specific hdcp data
668 * Return: 0 on Success, <0 on Failure
671 mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
673 struct wired_cmd_close_session_in session_close_in = { { 0 } };
674 struct wired_cmd_close_session_out session_close_out = { { 0 } };
675 struct mei_cl_device *cldev;
681 cldev = to_mei_cl_device(dev);
683 session_close_in.header.api_version = HDCP_API_VERSION;
684 session_close_in.header.command_id = WIRED_CLOSE_SESSION;
685 session_close_in.header.status = ME_HDCP_STATUS_SUCCESS;
686 session_close_in.header.buffer_len =
687 WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN;
689 session_close_in.port.integrated_port_type = data->port_type;
690 session_close_in.port.physical_port = mei_get_ddi_index(data->port);
692 byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
693 sizeof(session_close_in));
695 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
699 byte = mei_cldev_recv(cldev, (u8 *)&session_close_out,
700 sizeof(session_close_out));
702 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
706 if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) {
707 dev_dbg(dev, "Session Close Failed. status: 0x%X\n",
708 session_close_out.header.status);
715 static const struct i915_hdcp_component_ops mei_hdcp_ops = {
716 .owner = THIS_MODULE,
717 .initiate_hdcp2_session = mei_hdcp_initiate_session,
718 .verify_receiver_cert_prepare_km =
719 mei_hdcp_verify_receiver_cert_prepare_km,
720 .verify_hprime = mei_hdcp_verify_hprime,
721 .store_pairing_info = mei_hdcp_store_pairing_info,
722 .initiate_locality_check = mei_hdcp_initiate_locality_check,
723 .verify_lprime = mei_hdcp_verify_lprime,
724 .get_session_key = mei_hdcp_get_session_key,
725 .repeater_check_flow_prepare_ack =
726 mei_hdcp_repeater_check_flow_prepare_ack,
727 .verify_mprime = mei_hdcp_verify_mprime,
728 .enable_hdcp_authentication = mei_hdcp_enable_authentication,
729 .close_hdcp_session = mei_hdcp_close_session,
732 static int mei_component_master_bind(struct device *dev)
734 struct mei_cl_device *cldev = to_mei_cl_device(dev);
735 struct i915_hdcp_comp_master *comp_master =
736 mei_cldev_get_drvdata(cldev);
739 dev_dbg(dev, "%s\n", __func__);
740 comp_master->ops = &mei_hdcp_ops;
741 comp_master->mei_dev = dev;
742 ret = component_bind_all(dev, comp_master);
749 static void mei_component_master_unbind(struct device *dev)
751 struct mei_cl_device *cldev = to_mei_cl_device(dev);
752 struct i915_hdcp_comp_master *comp_master =
753 mei_cldev_get_drvdata(cldev);
755 dev_dbg(dev, "%s\n", __func__);
756 component_unbind_all(dev, comp_master);
759 static const struct component_master_ops mei_component_master_ops = {
760 .bind = mei_component_master_bind,
761 .unbind = mei_component_master_unbind,
764 static int mei_hdcp_component_match(struct device *dev, int subcomponent,
767 return !strcmp(dev->driver->name, "i915") &&
768 subcomponent == I915_COMPONENT_HDCP;
771 static int mei_hdcp_probe(struct mei_cl_device *cldev,
772 const struct mei_cl_device_id *id)
774 struct i915_hdcp_comp_master *comp_master;
775 struct component_match *master_match;
778 ret = mei_cldev_enable(cldev);
780 dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
781 goto enable_err_exit;
784 comp_master = kzalloc(sizeof(*comp_master), GFP_KERNEL);
791 component_match_add_typed(&cldev->dev, &master_match,
792 mei_hdcp_component_match, comp_master);
793 if (IS_ERR_OR_NULL(master_match)) {
798 mei_cldev_set_drvdata(cldev, comp_master);
799 ret = component_master_add_with_match(&cldev->dev,
800 &mei_component_master_ops,
803 dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
810 mei_cldev_set_drvdata(cldev, NULL);
812 mei_cldev_disable(cldev);
817 static int mei_hdcp_remove(struct mei_cl_device *cldev)
819 struct i915_hdcp_comp_master *comp_master =
820 mei_cldev_get_drvdata(cldev);
822 component_master_del(&cldev->dev, &mei_component_master_ops);
824 mei_cldev_set_drvdata(cldev, NULL);
826 return mei_cldev_disable(cldev);
829 #define MEI_UUID_HDCP GUID_INIT(0xB638AB7E, 0x94E2, 0x4EA2, 0xA5, \
830 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
832 static struct mei_cl_device_id mei_hdcp_tbl[] = {
833 { .uuid = MEI_UUID_HDCP, .version = MEI_CL_VERSION_ANY },
836 MODULE_DEVICE_TABLE(mei, mei_hdcp_tbl);
838 static struct mei_cl_driver mei_hdcp_driver = {
839 .id_table = mei_hdcp_tbl,
840 .name = KBUILD_MODNAME,
841 .probe = mei_hdcp_probe,
842 .remove = mei_hdcp_remove,
845 module_mei_cl_driver(mei_hdcp_driver);
847 MODULE_AUTHOR("Intel Corporation");
848 MODULE_LICENSE("GPL");
849 MODULE_DESCRIPTION("MEI HDCP");