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 * The mei_hdcp driver acts as a translation layer between HDCP 2.2
15 * protocol implementer (I915) and ME FW by translating HDCP2.2
16 * negotiation messages to ME FW command payloads and vice versa.
19 #include <linux/module.h>
20 #include <linux/slab.h>
21 #include <linux/uuid.h>
22 #include <linux/mei_cl_bus.h>
23 #include <linux/component.h>
24 #include <drm/drm_connector.h>
25 #include <drm/i915_component.h>
26 #include <drm/i915_mei_hdcp_interface.h>
30 static inline u8 mei_get_ddi_index(enum port port)
35 case PORT_B ... PORT_F:
38 return MEI_DDI_INVALID_PORT;
43 * mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in ME FW
44 * @dev: device corresponding to the mei_cl_device
45 * @data: Intel HW specific hdcp data
46 * @ake_data: AKE_Init msg output.
48 * Return: 0 on Success, <0 on Failure.
51 mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
52 struct hdcp2_ake_init *ake_data)
54 struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
55 struct wired_cmd_initiate_hdcp2_session_out
56 session_init_out = { { 0 } };
57 struct mei_cl_device *cldev;
60 if (!dev || !data || !ake_data)
63 cldev = to_mei_cl_device(dev);
65 session_init_in.header.api_version = HDCP_API_VERSION;
66 session_init_in.header.command_id = WIRED_INITIATE_HDCP2_SESSION;
67 session_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
68 session_init_in.header.buffer_len =
69 WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN;
71 session_init_in.port.integrated_port_type = data->port_type;
72 session_init_in.port.physical_port = mei_get_ddi_index(data->port);
73 session_init_in.protocol = data->protocol;
75 byte = mei_cldev_send(cldev, (u8 *)&session_init_in,
76 sizeof(session_init_in));
78 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
82 byte = mei_cldev_recv(cldev, (u8 *)&session_init_out,
83 sizeof(session_init_out));
85 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
89 if (session_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
90 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
91 WIRED_INITIATE_HDCP2_SESSION,
92 session_init_out.header.status);
96 ake_data->msg_id = HDCP_2_2_AKE_INIT;
97 ake_data->tx_caps = session_init_out.tx_caps;
98 memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN);
104 * mei_hdcp_verify_receiver_cert_prepare_km() - Verify the Receiver Certificate
105 * AKE_Send_Cert and prepare AKE_Stored_Km/AKE_No_Stored_Km
106 * @dev: device corresponding to the mei_cl_device
107 * @data: Intel HW specific hdcp data
108 * @rx_cert: AKE_Send_Cert for verification
109 * @km_stored: Pairing status flag output
110 * @ek_pub_km: AKE_Stored_Km/AKE_No_Stored_Km output msg
111 * @msg_sz : size of AKE_XXXXX_Km output msg
113 * Return: 0 on Success, <0 on Failure
116 mei_hdcp_verify_receiver_cert_prepare_km(struct device *dev,
117 struct hdcp_port_data *data,
118 struct hdcp2_ake_send_cert *rx_cert,
120 struct hdcp2_ake_no_stored_km
124 struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = { { 0 } };
125 struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = { { 0 } };
126 struct mei_cl_device *cldev;
129 if (!dev || !data || !rx_cert || !km_stored || !ek_pub_km || !msg_sz)
132 cldev = to_mei_cl_device(dev);
134 verify_rxcert_in.header.api_version = HDCP_API_VERSION;
135 verify_rxcert_in.header.command_id = WIRED_VERIFY_RECEIVER_CERT;
136 verify_rxcert_in.header.status = ME_HDCP_STATUS_SUCCESS;
137 verify_rxcert_in.header.buffer_len =
138 WIRED_CMD_BUF_LEN_VERIFY_RECEIVER_CERT_IN;
140 verify_rxcert_in.port.integrated_port_type = data->port_type;
141 verify_rxcert_in.port.physical_port = mei_get_ddi_index(data->port);
143 verify_rxcert_in.cert_rx = rx_cert->cert_rx;
144 memcpy(verify_rxcert_in.r_rx, &rx_cert->r_rx, HDCP_2_2_RRX_LEN);
145 memcpy(verify_rxcert_in.rx_caps, rx_cert->rx_caps, HDCP_2_2_RXCAPS_LEN);
147 byte = mei_cldev_send(cldev, (u8 *)&verify_rxcert_in,
148 sizeof(verify_rxcert_in));
150 dev_dbg(dev, "mei_cldev_send failed: %zd\n", byte);
154 byte = mei_cldev_recv(cldev, (u8 *)&verify_rxcert_out,
155 sizeof(verify_rxcert_out));
157 dev_dbg(dev, "mei_cldev_recv failed: %zd\n", byte);
161 if (verify_rxcert_out.header.status != ME_HDCP_STATUS_SUCCESS) {
162 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
163 WIRED_VERIFY_RECEIVER_CERT,
164 verify_rxcert_out.header.status);
168 *km_stored = !!verify_rxcert_out.km_stored;
169 if (verify_rxcert_out.km_stored) {
170 ek_pub_km->msg_id = HDCP_2_2_AKE_STORED_KM;
171 *msg_sz = sizeof(struct hdcp2_ake_stored_km);
173 ek_pub_km->msg_id = HDCP_2_2_AKE_NO_STORED_KM;
174 *msg_sz = sizeof(struct hdcp2_ake_no_stored_km);
177 memcpy(ek_pub_km->e_kpub_km, &verify_rxcert_out.ekm_buff,
178 sizeof(verify_rxcert_out.ekm_buff));
184 * mei_hdcp_verify_hprime() - Verify AKE_Send_H_prime at ME FW.
185 * @dev: device corresponding to the mei_cl_device
186 * @data: Intel HW specific hdcp data
187 * @rx_hprime: AKE_Send_H_prime msg for ME FW verification
189 * Return: 0 on Success, <0 on Failure
192 mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
193 struct hdcp2_ake_send_hprime *rx_hprime)
195 struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } };
196 struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } };
197 struct mei_cl_device *cldev;
200 if (!dev || !data || !rx_hprime)
203 cldev = to_mei_cl_device(dev);
205 send_hprime_in.header.api_version = HDCP_API_VERSION;
206 send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME;
207 send_hprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
208 send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN;
210 send_hprime_in.port.integrated_port_type = data->port_type;
211 send_hprime_in.port.physical_port = mei_get_ddi_index(data->port);
213 memcpy(send_hprime_in.h_prime, rx_hprime->h_prime,
214 HDCP_2_2_H_PRIME_LEN);
216 byte = mei_cldev_send(cldev, (u8 *)&send_hprime_in,
217 sizeof(send_hprime_in));
219 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
223 byte = mei_cldev_recv(cldev, (u8 *)&send_hprime_out,
224 sizeof(send_hprime_out));
226 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
230 if (send_hprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
231 dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
232 WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status);
240 * mei_hdcp_store_pairing_info() - Store pairing info received at ME FW
241 * @dev: device corresponding to the mei_cl_device
242 * @data: Intel HW specific hdcp data
243 * @pairing_info: AKE_Send_Pairing_Info msg input to ME FW
245 * Return: 0 on Success, <0 on Failure
248 mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
249 struct hdcp2_ake_send_pairing_info *pairing_info)
251 struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
252 struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
253 struct mei_cl_device *cldev;
256 if (!dev || !data || !pairing_info)
259 cldev = to_mei_cl_device(dev);
261 pairing_info_in.header.api_version = HDCP_API_VERSION;
262 pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO;
263 pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS;
264 pairing_info_in.header.buffer_len =
265 WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN;
267 pairing_info_in.port.integrated_port_type = data->port_type;
268 pairing_info_in.port.physical_port = mei_get_ddi_index(data->port);
270 memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
271 HDCP_2_2_E_KH_KM_LEN);
273 byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in,
274 sizeof(pairing_info_in));
276 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
280 byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out,
281 sizeof(pairing_info_out));
283 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
287 if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) {
288 dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n",
289 WIRED_AKE_SEND_PAIRING_INFO,
290 pairing_info_out.header.status);
298 * mei_hdcp_initiate_locality_check() - Prepare LC_Init
299 * @dev: device corresponding to the mei_cl_device
300 * @data: Intel HW specific hdcp data
301 * @lc_init_data: LC_Init msg output
303 * Return: 0 on Success, <0 on Failure
306 mei_hdcp_initiate_locality_check(struct device *dev,
307 struct hdcp_port_data *data,
308 struct hdcp2_lc_init *lc_init_data)
310 struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } };
311 struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } };
312 struct mei_cl_device *cldev;
315 if (!dev || !data || !lc_init_data)
318 cldev = to_mei_cl_device(dev);
320 lc_init_in.header.api_version = HDCP_API_VERSION;
321 lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK;
322 lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
323 lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN;
325 lc_init_in.port.integrated_port_type = data->port_type;
326 lc_init_in.port.physical_port = mei_get_ddi_index(data->port);
328 byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
330 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
334 byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out));
336 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
340 if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
341 dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n",
342 WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status);
346 lc_init_data->msg_id = HDCP_2_2_LC_INIT;
347 memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN);
353 * mei_hdcp_verify_lprime() - Verify lprime.
354 * @dev: device corresponding to the mei_cl_device
355 * @data: Intel HW specific hdcp data
356 * @rx_lprime: LC_Send_L_prime msg for ME FW verification
358 * Return: 0 on Success, <0 on Failure
361 mei_hdcp_verify_lprime(struct device *dev, struct hdcp_port_data *data,
362 struct hdcp2_lc_send_lprime *rx_lprime)
364 struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } };
365 struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } };
366 struct mei_cl_device *cldev;
369 if (!dev || !data || !rx_lprime)
372 cldev = to_mei_cl_device(dev);
374 verify_lprime_in.header.api_version = HDCP_API_VERSION;
375 verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY;
376 verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
377 verify_lprime_in.header.buffer_len =
378 WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN;
380 verify_lprime_in.port.integrated_port_type = data->port_type;
381 verify_lprime_in.port.physical_port = mei_get_ddi_index(data->port);
383 memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime,
384 HDCP_2_2_L_PRIME_LEN);
386 byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in,
387 sizeof(verify_lprime_in));
389 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
393 byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out,
394 sizeof(verify_lprime_out));
396 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
400 if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
401 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
402 WIRED_VALIDATE_LOCALITY,
403 verify_lprime_out.header.status);
411 * mei_hdcp_get_session_key() - Prepare SKE_Send_Eks.
412 * @dev: device corresponding to the mei_cl_device
413 * @data: Intel HW specific hdcp data
414 * @ske_data: SKE_Send_Eks msg output from ME FW.
416 * Return: 0 on Success, <0 on Failure
418 static int mei_hdcp_get_session_key(struct device *dev,
419 struct hdcp_port_data *data,
420 struct hdcp2_ske_send_eks *ske_data)
422 struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
423 struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
424 struct mei_cl_device *cldev;
427 if (!dev || !data || !ske_data)
430 cldev = to_mei_cl_device(dev);
432 get_skey_in.header.api_version = HDCP_API_VERSION;
433 get_skey_in.header.command_id = WIRED_GET_SESSION_KEY;
434 get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS;
435 get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN;
437 get_skey_in.port.integrated_port_type = data->port_type;
438 get_skey_in.port.physical_port = mei_get_ddi_index(data->port);
440 byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in));
442 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
446 byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, sizeof(get_skey_out));
449 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
453 if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) {
454 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
455 WIRED_GET_SESSION_KEY, get_skey_out.header.status);
459 ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS;
460 memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks,
461 HDCP_2_2_E_DKEY_KS_LEN);
462 memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN);
468 * mei_hdcp_repeater_check_flow_prepare_ack() - Validate the Downstream topology
469 * and prepare rep_ack.
470 * @dev: device corresponding to the mei_cl_device
471 * @data: Intel HW specific hdcp data
472 * @rep_topology: Receiver ID List to be validated
473 * @rep_send_ack : repeater ack from ME FW.
475 * Return: 0 on Success, <0 on Failure
478 mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev,
479 struct hdcp_port_data *data,
480 struct hdcp2_rep_send_receiverid_list
482 struct hdcp2_rep_send_ack
485 struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } };
486 struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } };
487 struct mei_cl_device *cldev;
490 if (!dev || !rep_topology || !rep_send_ack || !data)
493 cldev = to_mei_cl_device(dev);
495 verify_repeater_in.header.api_version = HDCP_API_VERSION;
496 verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER;
497 verify_repeater_in.header.status = ME_HDCP_STATUS_SUCCESS;
498 verify_repeater_in.header.buffer_len =
499 WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN;
501 verify_repeater_in.port.integrated_port_type = data->port_type;
502 verify_repeater_in.port.physical_port = mei_get_ddi_index(data->port);
504 memcpy(verify_repeater_in.rx_info, rep_topology->rx_info,
505 HDCP_2_2_RXINFO_LEN);
506 memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v,
507 HDCP_2_2_SEQ_NUM_LEN);
508 memcpy(verify_repeater_in.v_prime, rep_topology->v_prime,
509 HDCP_2_2_V_PRIME_HALF_LEN);
510 memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids,
511 HDCP_2_2_RECEIVER_IDS_MAX_LEN);
513 byte = mei_cldev_send(cldev, (u8 *)&verify_repeater_in,
514 sizeof(verify_repeater_in));
516 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
520 byte = mei_cldev_recv(cldev, (u8 *)&verify_repeater_out,
521 sizeof(verify_repeater_out));
523 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
527 if (verify_repeater_out.header.status != ME_HDCP_STATUS_SUCCESS) {
528 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
529 WIRED_VERIFY_REPEATER,
530 verify_repeater_out.header.status);
534 memcpy(rep_send_ack->v, verify_repeater_out.v,
535 HDCP_2_2_V_PRIME_HALF_LEN);
536 rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK;
542 * mei_hdcp_verify_mprime() - Verify mprime.
543 * @dev: device corresponding to the mei_cl_device
544 * @data: Intel HW specific hdcp data
545 * @stream_ready: RepeaterAuth_Stream_Ready msg for ME FW verification.
547 * Return: 0 on Success, <0 on Failure
549 static int mei_hdcp_verify_mprime(struct device *dev,
550 struct hdcp_port_data *data,
551 struct hdcp2_rep_stream_ready *stream_ready)
553 struct wired_cmd_repeater_auth_stream_req_in
554 verify_mprime_in = { { 0 } };
555 struct wired_cmd_repeater_auth_stream_req_out
556 verify_mprime_out = { { 0 } };
557 struct mei_cl_device *cldev;
560 if (!dev || !stream_ready || !data)
563 cldev = to_mei_cl_device(dev);
565 verify_mprime_in.header.api_version = HDCP_API_VERSION;
566 verify_mprime_in.header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
567 verify_mprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
568 verify_mprime_in.header.buffer_len =
569 WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
571 verify_mprime_in.port.integrated_port_type = data->port_type;
572 verify_mprime_in.port.physical_port = mei_get_ddi_index(data->port);
574 memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
575 HDCP_2_2_MPRIME_LEN);
576 drm_hdcp_cpu_to_be24(verify_mprime_in.seq_num_m, data->seq_num_m);
577 memcpy(verify_mprime_in.streams, data->streams,
578 (data->k * sizeof(struct hdcp2_streamid_type)));
580 verify_mprime_in.k = cpu_to_be16(data->k);
582 byte = mei_cldev_send(cldev, (u8 *)&verify_mprime_in,
583 sizeof(verify_mprime_in));
585 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
589 byte = mei_cldev_recv(cldev, (u8 *)&verify_mprime_out,
590 sizeof(verify_mprime_out));
592 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
596 if (verify_mprime_out.header.status != ME_HDCP_STATUS_SUCCESS) {
597 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
598 WIRED_REPEATER_AUTH_STREAM_REQ,
599 verify_mprime_out.header.status);
607 * mei_hdcp_enable_authentication() - Mark a port as authenticated
609 * @dev: device corresponding to the mei_cl_device
610 * @data: Intel HW specific hdcp data
612 * Return: 0 on Success, <0 on Failure
614 static int mei_hdcp_enable_authentication(struct device *dev,
615 struct hdcp_port_data *data)
617 struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } };
618 struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } };
619 struct mei_cl_device *cldev;
625 cldev = to_mei_cl_device(dev);
627 enable_auth_in.header.api_version = HDCP_API_VERSION;
628 enable_auth_in.header.command_id = WIRED_ENABLE_AUTH;
629 enable_auth_in.header.status = ME_HDCP_STATUS_SUCCESS;
630 enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN;
632 enable_auth_in.port.integrated_port_type = data->port_type;
633 enable_auth_in.port.physical_port = mei_get_ddi_index(data->port);
634 enable_auth_in.stream_type = data->streams[0].stream_type;
636 byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in,
637 sizeof(enable_auth_in));
639 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
643 byte = mei_cldev_recv(cldev, (u8 *)&enable_auth_out,
644 sizeof(enable_auth_out));
646 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
650 if (enable_auth_out.header.status != ME_HDCP_STATUS_SUCCESS) {
651 dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
652 WIRED_ENABLE_AUTH, enable_auth_out.header.status);
660 * mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
661 * This also disables the authenticated state of the port.
662 * @dev: device corresponding to the mei_cl_device
663 * @data: Intel HW specific hdcp data
665 * Return: 0 on Success, <0 on Failure
668 mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
670 struct wired_cmd_close_session_in session_close_in = { { 0 } };
671 struct wired_cmd_close_session_out session_close_out = { { 0 } };
672 struct mei_cl_device *cldev;
678 cldev = to_mei_cl_device(dev);
680 session_close_in.header.api_version = HDCP_API_VERSION;
681 session_close_in.header.command_id = WIRED_CLOSE_SESSION;
682 session_close_in.header.status = ME_HDCP_STATUS_SUCCESS;
683 session_close_in.header.buffer_len =
684 WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN;
686 session_close_in.port.integrated_port_type = data->port_type;
687 session_close_in.port.physical_port = mei_get_ddi_index(data->port);
689 byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
690 sizeof(session_close_in));
692 dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
696 byte = mei_cldev_recv(cldev, (u8 *)&session_close_out,
697 sizeof(session_close_out));
699 dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
703 if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) {
704 dev_dbg(dev, "Session Close Failed. status: 0x%X\n",
705 session_close_out.header.status);
712 static const struct i915_hdcp_component_ops mei_hdcp_ops = {
713 .owner = THIS_MODULE,
714 .initiate_hdcp2_session = mei_hdcp_initiate_session,
715 .verify_receiver_cert_prepare_km =
716 mei_hdcp_verify_receiver_cert_prepare_km,
717 .verify_hprime = mei_hdcp_verify_hprime,
718 .store_pairing_info = mei_hdcp_store_pairing_info,
719 .initiate_locality_check = mei_hdcp_initiate_locality_check,
720 .verify_lprime = mei_hdcp_verify_lprime,
721 .get_session_key = mei_hdcp_get_session_key,
722 .repeater_check_flow_prepare_ack =
723 mei_hdcp_repeater_check_flow_prepare_ack,
724 .verify_mprime = mei_hdcp_verify_mprime,
725 .enable_hdcp_authentication = mei_hdcp_enable_authentication,
726 .close_hdcp_session = mei_hdcp_close_session,
729 static int mei_component_master_bind(struct device *dev)
731 struct mei_cl_device *cldev = to_mei_cl_device(dev);
732 struct i915_hdcp_comp_master *comp_master =
733 mei_cldev_get_drvdata(cldev);
736 dev_dbg(dev, "%s\n", __func__);
737 comp_master->ops = &mei_hdcp_ops;
738 comp_master->mei_dev = dev;
739 ret = component_bind_all(dev, comp_master);
746 static void mei_component_master_unbind(struct device *dev)
748 struct mei_cl_device *cldev = to_mei_cl_device(dev);
749 struct i915_hdcp_comp_master *comp_master =
750 mei_cldev_get_drvdata(cldev);
752 dev_dbg(dev, "%s\n", __func__);
753 component_unbind_all(dev, comp_master);
756 static const struct component_master_ops mei_component_master_ops = {
757 .bind = mei_component_master_bind,
758 .unbind = mei_component_master_unbind,
761 static int mei_hdcp_component_match(struct device *dev, int subcomponent,
764 return !strcmp(dev->driver->name, "i915") &&
765 subcomponent == I915_COMPONENT_HDCP;
768 static int mei_hdcp_probe(struct mei_cl_device *cldev,
769 const struct mei_cl_device_id *id)
771 struct i915_hdcp_comp_master *comp_master;
772 struct component_match *master_match;
775 ret = mei_cldev_enable(cldev);
777 dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret);
778 goto enable_err_exit;
781 comp_master = kzalloc(sizeof(*comp_master), GFP_KERNEL);
788 component_match_add_typed(&cldev->dev, &master_match,
789 mei_hdcp_component_match, comp_master);
790 if (IS_ERR_OR_NULL(master_match)) {
795 mei_cldev_set_drvdata(cldev, comp_master);
796 ret = component_master_add_with_match(&cldev->dev,
797 &mei_component_master_ops,
800 dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
807 mei_cldev_set_drvdata(cldev, NULL);
809 mei_cldev_disable(cldev);
814 static int mei_hdcp_remove(struct mei_cl_device *cldev)
816 struct i915_hdcp_comp_master *comp_master =
817 mei_cldev_get_drvdata(cldev);
819 component_master_del(&cldev->dev, &mei_component_master_ops);
821 mei_cldev_set_drvdata(cldev, NULL);
823 return mei_cldev_disable(cldev);
826 #define MEI_UUID_HDCP GUID_INIT(0xB638AB7E, 0x94E2, 0x4EA2, 0xA5, \
827 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
829 static struct mei_cl_device_id mei_hdcp_tbl[] = {
830 { .uuid = MEI_UUID_HDCP, .version = MEI_CL_VERSION_ANY },
833 MODULE_DEVICE_TABLE(mei, mei_hdcp_tbl);
835 static struct mei_cl_driver mei_hdcp_driver = {
836 .id_table = mei_hdcp_tbl,
837 .name = KBUILD_MODNAME,
838 .probe = mei_hdcp_probe,
839 .remove = mei_hdcp_remove,
842 module_mei_cl_driver(mei_hdcp_driver);
844 MODULE_AUTHOR("Intel Corporation");
845 MODULE_LICENSE("GPL");
846 MODULE_DESCRIPTION("MEI HDCP");