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1/*
2 * Copyright 2019 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26#include "dm_services.h"
27#include "dm_helpers.h"
28#include "include/hdcp_msg_types.h"
29#include "include/signal_types.h"
30#include "core_types.h"
31#include "link.h"
32#include "link_hwss.h"
33#include "link/protocols/link_dpcd.h"
34
35#define DC_LOGGER \
36 link->ctx->logger
37#define HDCP14_KSV_SIZE 5
38#define HDCP14_MAX_KSV_FIFO_SIZE 127*HDCP14_KSV_SIZE
39
40static const bool hdcp_cmd_is_read[HDCP_MESSAGE_ID_MAX] = {
41 [HDCP_MESSAGE_ID_READ_BKSV] = true,
42 [HDCP_MESSAGE_ID_READ_RI_R0] = true,
43 [HDCP_MESSAGE_ID_READ_PJ] = true,
44 [HDCP_MESSAGE_ID_WRITE_AKSV] = false,
45 [HDCP_MESSAGE_ID_WRITE_AINFO] = false,
46 [HDCP_MESSAGE_ID_WRITE_AN] = false,
47 [HDCP_MESSAGE_ID_READ_VH_X] = true,
48 [HDCP_MESSAGE_ID_READ_VH_0] = true,
49 [HDCP_MESSAGE_ID_READ_VH_1] = true,
50 [HDCP_MESSAGE_ID_READ_VH_2] = true,
51 [HDCP_MESSAGE_ID_READ_VH_3] = true,
52 [HDCP_MESSAGE_ID_READ_VH_4] = true,
53 [HDCP_MESSAGE_ID_READ_BCAPS] = true,
54 [HDCP_MESSAGE_ID_READ_BSTATUS] = true,
55 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = true,
56 [HDCP_MESSAGE_ID_READ_BINFO] = true,
57 [HDCP_MESSAGE_ID_HDCP2VERSION] = true,
58 [HDCP_MESSAGE_ID_RX_CAPS] = true,
59 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = false,
60 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = true,
61 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = false,
62 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = false,
63 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = true,
64 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = true,
65 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = false,
66 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = true,
67 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = false,
68 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = true,
69 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = false,
70 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = false,
71 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = true,
72 [HDCP_MESSAGE_ID_READ_RXSTATUS] = true,
73 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = false,
74};
75
76static const uint8_t hdcp_i2c_offsets[HDCP_MESSAGE_ID_MAX] = {
77 [HDCP_MESSAGE_ID_READ_BKSV] = 0x0,
78 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x8,
79 [HDCP_MESSAGE_ID_READ_PJ] = 0xA,
80 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x10,
81 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x15,
82 [HDCP_MESSAGE_ID_WRITE_AN] = 0x18,
83 [HDCP_MESSAGE_ID_READ_VH_X] = 0x20,
84 [HDCP_MESSAGE_ID_READ_VH_0] = 0x20,
85 [HDCP_MESSAGE_ID_READ_VH_1] = 0x24,
86 [HDCP_MESSAGE_ID_READ_VH_2] = 0x28,
87 [HDCP_MESSAGE_ID_READ_VH_3] = 0x2C,
88 [HDCP_MESSAGE_ID_READ_VH_4] = 0x30,
89 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x40,
90 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x41,
91 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x43,
92 [HDCP_MESSAGE_ID_READ_BINFO] = 0xFF,
93 [HDCP_MESSAGE_ID_HDCP2VERSION] = 0x50,
94 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x60,
95 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x80,
96 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x60,
97 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x60,
98 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x80,
99 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x80,
100 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x60,
101 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x80,
102 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x60,
103 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x80,
104 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x60,
105 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x60,
106 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x80,
107 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x70,
108 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x0,
109};
110
111struct protection_properties {
112 bool supported;
113 bool (*process_transaction)(
114 struct dc_link *link,
115 struct hdcp_protection_message *message_info);
116};
117
118static const struct protection_properties non_supported_protection = {
119 .supported = false
120};
121
122static bool hdmi_14_process_transaction(
123 struct dc_link *link,
124 struct hdcp_protection_message *message_info)
125{
126 uint8_t *buff = NULL;
127 bool result;
128 const uint8_t hdcp_i2c_addr_link_primary = 0x3a; /* 0x74 >> 1*/
129 const uint8_t hdcp_i2c_addr_link_secondary = 0x3b; /* 0x76 >> 1*/
130 struct i2c_command i2c_command;
131 uint8_t offset;
132 struct i2c_payload i2c_payloads[] = {
133 { true, 0, 1, 0 },
134 /* actual hdcp payload, will be filled later, zeroed for now*/
135 { 0 }
136 };
137
138 if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) {
139 DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id);
140 return false;
141 }
142
143 offset = hdcp_i2c_offsets[message_info->msg_id];
144 i2c_payloads[0].data = &offset;
145
146 switch (message_info->link) {
147 case HDCP_LINK_SECONDARY:
148 i2c_payloads[0].address = hdcp_i2c_addr_link_secondary;
149 i2c_payloads[1].address = hdcp_i2c_addr_link_secondary;
150 break;
151 case HDCP_LINK_PRIMARY:
152 default:
153 i2c_payloads[0].address = hdcp_i2c_addr_link_primary;
154 i2c_payloads[1].address = hdcp_i2c_addr_link_primary;
155 break;
156 }
157
158 if (hdcp_cmd_is_read[message_info->msg_id]) {
159 i2c_payloads[1].write = false;
160 i2c_command.number_of_payloads = ARRAY_SIZE(i2c_payloads);
161 i2c_payloads[1].length = message_info->length;
162 i2c_payloads[1].data = message_info->data;
163 } else {
164 i2c_command.number_of_payloads = 1;
165 buff = kzalloc(message_info->length + 1, GFP_KERNEL);
166
167 if (!buff)
168 return false;
169
170 buff[0] = offset;
171 memmove(&buff[1], message_info->data, message_info->length);
172 i2c_payloads[0].length = message_info->length + 1;
173 i2c_payloads[0].data = buff;
174 }
175
176 i2c_command.payloads = i2c_payloads;
177 i2c_command.engine = I2C_COMMAND_ENGINE_HW;//only HW
178 i2c_command.speed = link->ddc->ctx->dc->caps.i2c_speed_in_khz;
179
180 result = dm_helpers_submit_i2c(
181 link->ctx,
182 link,
183 &i2c_command);
184 kfree(buff);
185
186 return result;
187}
188
189static const struct protection_properties hdmi_14_protection = {
190 .supported = true,
191 .process_transaction = hdmi_14_process_transaction
192};
193
194static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = {
195 [HDCP_MESSAGE_ID_READ_BKSV] = 0x68000,
196 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x68005,
197 [HDCP_MESSAGE_ID_READ_PJ] = 0xFFFFFFFF,
198 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x68007,
199 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x6803B,
200 [HDCP_MESSAGE_ID_WRITE_AN] = 0x6800c,
201 [HDCP_MESSAGE_ID_READ_VH_X] = 0x68014,
202 [HDCP_MESSAGE_ID_READ_VH_0] = 0x68014,
203 [HDCP_MESSAGE_ID_READ_VH_1] = 0x68018,
204 [HDCP_MESSAGE_ID_READ_VH_2] = 0x6801c,
205 [HDCP_MESSAGE_ID_READ_VH_3] = 0x68020,
206 [HDCP_MESSAGE_ID_READ_VH_4] = 0x68024,
207 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x68028,
208 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x68029,
209 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x6802c,
210 [HDCP_MESSAGE_ID_READ_BINFO] = 0x6802a,
211 [HDCP_MESSAGE_ID_RX_CAPS] = 0x6921d,
212 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x69000,
213 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x6900b,
214 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x69220,
215 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x692a0,
216 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x692c0,
217 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x692e0,
218 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x692f0,
219 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x692f8,
220 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x69318,
221 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x69330,
222 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x693e0,
223 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x693f0,
224 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x69473,
225 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x69493,
226 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x69494
227};
228
229static bool dpcd_access_helper(
230 struct dc_link *link,
231 uint32_t length,
232 uint8_t *data,
233 uint32_t dpcd_addr,
234 bool is_read)
235{
236 enum dc_status status;
237 uint32_t cur_length = 0;
238 uint32_t offset = 0;
239 uint32_t ksv_read_size = 0x6803b - 0x6802c;
240
241 /* Read KSV, need repeatedly handle */
242 if (dpcd_addr == 0x6802c) {
243 if (length % HDCP14_KSV_SIZE) {
244 DC_LOG_ERROR("%s: KsvFifo Size(%d) is not a multiple of HDCP14_KSV_SIZE(%d)\n",
245 __func__,
246 length,
247 HDCP14_KSV_SIZE);
248 }
249 if (length > HDCP14_MAX_KSV_FIFO_SIZE) {
250 DC_LOG_ERROR("%s: KsvFifo Size(%d) is greater than HDCP14_MAX_KSV_FIFO_SIZE(%d)\n",
251 __func__,
252 length,
253 HDCP14_MAX_KSV_FIFO_SIZE);
254 }
255
256 DC_LOG_ERROR("%s: Reading %d Ksv(s) from KsvFifo\n",
257 __func__,
258 length / HDCP14_KSV_SIZE);
259
260 while (length > 0) {
261 if (length > ksv_read_size) {
262 status = core_link_read_dpcd(
263 link,
264 dpcd_addr + offset,
265 data + offset,
266 ksv_read_size);
267
268 data += ksv_read_size;
269 length -= ksv_read_size;
270 } else {
271 status = core_link_read_dpcd(
272 link,
273 dpcd_addr + offset,
274 data + offset,
275 length);
276
277 data += length;
278 length = 0;
279 }
280
281 if (status != DC_OK)
282 return false;
283 }
284 } else {
285 while (length > 0) {
286 if (length > DEFAULT_AUX_MAX_DATA_SIZE)
287 cur_length = DEFAULT_AUX_MAX_DATA_SIZE;
288 else
289 cur_length = length;
290
291 if (is_read) {
292 status = core_link_read_dpcd(
293 link,
294 dpcd_addr + offset,
295 data + offset,
296 cur_length);
297 } else {
298 status = core_link_write_dpcd(
299 link,
300 dpcd_addr + offset,
301 data + offset,
302 cur_length);
303 }
304
305 if (status != DC_OK)
306 return false;
307
308 length -= cur_length;
309 offset += cur_length;
310 }
311 }
312 return true;
313}
314
315static bool dp_11_process_transaction(
316 struct dc_link *link,
317 struct hdcp_protection_message *message_info)
318{
319 if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) {
320 DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id);
321 return false;
322 }
323
324 return dpcd_access_helper(
325 link,
326 message_info->length,
327 message_info->data,
328 hdcp_dpcd_addrs[message_info->msg_id],
329 hdcp_cmd_is_read[message_info->msg_id]);
330}
331
332static const struct protection_properties dp_11_protection = {
333 .supported = true,
334 .process_transaction = dp_11_process_transaction
335};
336
337static const struct protection_properties *get_protection_properties_by_signal(
338 struct dc_link *link,
339 enum signal_type st,
340 enum hdcp_version version)
341{
342 switch (version) {
343 case HDCP_VERSION_14:
344 switch (st) {
345 case SIGNAL_TYPE_DVI_SINGLE_LINK:
346 case SIGNAL_TYPE_DVI_DUAL_LINK:
347 case SIGNAL_TYPE_HDMI_TYPE_A:
348 return &hdmi_14_protection;
349 case SIGNAL_TYPE_DISPLAY_PORT:
350 if (link &&
351 (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER ||
352 link->dpcd_caps.dongle_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER)) {
353 return &non_supported_protection;
354 }
355 return &dp_11_protection;
356 case SIGNAL_TYPE_DISPLAY_PORT_MST:
357 case SIGNAL_TYPE_EDP:
358 return &dp_11_protection;
359 default:
360 return &non_supported_protection;
361 }
362 break;
363 case HDCP_VERSION_22:
364 switch (st) {
365 case SIGNAL_TYPE_DVI_SINGLE_LINK:
366 case SIGNAL_TYPE_DVI_DUAL_LINK:
367 case SIGNAL_TYPE_HDMI_TYPE_A:
368 return &hdmi_14_protection; //todo version2.2
369 case SIGNAL_TYPE_DISPLAY_PORT:
370 case SIGNAL_TYPE_DISPLAY_PORT_MST:
371 case SIGNAL_TYPE_EDP:
372 return &dp_11_protection; //todo version2.2
373 default:
374 return &non_supported_protection;
375 }
376 break;
377 default:
378 return &non_supported_protection;
379 }
380}
381
382enum hdcp_message_status dc_process_hdcp_msg(
383 enum signal_type signal,
384 struct dc_link *link,
385 struct hdcp_protection_message *message_info)
386{
387 enum hdcp_message_status status = HDCP_MESSAGE_FAILURE;
388 uint32_t i = 0;
389
390 const struct protection_properties *protection_props;
391
392 if (!message_info)
393 return HDCP_MESSAGE_UNSUPPORTED;
394
395 if (message_info->msg_id < HDCP_MESSAGE_ID_READ_BKSV ||
396 message_info->msg_id >= HDCP_MESSAGE_ID_MAX)
397 return HDCP_MESSAGE_UNSUPPORTED;
398
399 protection_props =
400 get_protection_properties_by_signal(
401 link,
402 signal,
403 message_info->version);
404
405 if (!protection_props->supported)
406 return HDCP_MESSAGE_UNSUPPORTED;
407
408 if (protection_props->process_transaction(
409 link,
410 message_info)) {
411 status = HDCP_MESSAGE_SUCCESS;
412 } else {
413 for (i = 0; i < message_info->max_retries; i++) {
414 if (protection_props->process_transaction(
415 link,
416 message_info)) {
417 status = HDCP_MESSAGE_SUCCESS;
418 break;
419 }
420 }
421 }
422
423 return status;
424}
425