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 <linux/slab.h> 27 28 #include "dm_services.h" 29 #include "dm_helpers.h" 30 #include "include/hdcp_msg_types.h" 31 #include "include/signal_types.h" 32 #include "core_types.h" 33 #include "link.h" 34 #include "link_hwss.h" 35 #include "link/protocols/link_dpcd.h" 36 37 #define DC_LOGGER \ 38 link->ctx->logger 39 #define HDCP14_KSV_SIZE 5 40 #define HDCP14_MAX_KSV_FIFO_SIZE 127*HDCP14_KSV_SIZE 41 42 static const bool hdcp_cmd_is_read[HDCP_MESSAGE_ID_MAX] = { 43 [HDCP_MESSAGE_ID_READ_BKSV] = true, 44 [HDCP_MESSAGE_ID_READ_RI_R0] = true, 45 [HDCP_MESSAGE_ID_READ_PJ] = true, 46 [HDCP_MESSAGE_ID_WRITE_AKSV] = false, 47 [HDCP_MESSAGE_ID_WRITE_AINFO] = false, 48 [HDCP_MESSAGE_ID_WRITE_AN] = false, 49 [HDCP_MESSAGE_ID_READ_VH_X] = true, 50 [HDCP_MESSAGE_ID_READ_VH_0] = true, 51 [HDCP_MESSAGE_ID_READ_VH_1] = true, 52 [HDCP_MESSAGE_ID_READ_VH_2] = true, 53 [HDCP_MESSAGE_ID_READ_VH_3] = true, 54 [HDCP_MESSAGE_ID_READ_VH_4] = true, 55 [HDCP_MESSAGE_ID_READ_BCAPS] = true, 56 [HDCP_MESSAGE_ID_READ_BSTATUS] = true, 57 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = true, 58 [HDCP_MESSAGE_ID_READ_BINFO] = true, 59 [HDCP_MESSAGE_ID_HDCP2VERSION] = true, 60 [HDCP_MESSAGE_ID_RX_CAPS] = true, 61 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = false, 62 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = true, 63 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = false, 64 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = false, 65 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = true, 66 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = true, 67 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = false, 68 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = true, 69 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = false, 70 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = true, 71 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = false, 72 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = false, 73 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = true, 74 [HDCP_MESSAGE_ID_READ_RXSTATUS] = true, 75 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = false 76 }; 77 78 static const uint8_t hdcp_i2c_offsets[HDCP_MESSAGE_ID_MAX] = { 79 [HDCP_MESSAGE_ID_READ_BKSV] = 0x0, 80 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x8, 81 [HDCP_MESSAGE_ID_READ_PJ] = 0xA, 82 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x10, 83 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x15, 84 [HDCP_MESSAGE_ID_WRITE_AN] = 0x18, 85 [HDCP_MESSAGE_ID_READ_VH_X] = 0x20, 86 [HDCP_MESSAGE_ID_READ_VH_0] = 0x20, 87 [HDCP_MESSAGE_ID_READ_VH_1] = 0x24, 88 [HDCP_MESSAGE_ID_READ_VH_2] = 0x28, 89 [HDCP_MESSAGE_ID_READ_VH_3] = 0x2C, 90 [HDCP_MESSAGE_ID_READ_VH_4] = 0x30, 91 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x40, 92 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x41, 93 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x43, 94 [HDCP_MESSAGE_ID_READ_BINFO] = 0xFF, 95 [HDCP_MESSAGE_ID_HDCP2VERSION] = 0x50, 96 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x60, 97 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x80, 98 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x60, 99 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x60, 100 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x80, 101 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x80, 102 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x60, 103 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x80, 104 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x60, 105 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x80, 106 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x60, 107 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x60, 108 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x80, 109 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x70, 110 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x0, 111 }; 112 113 struct protection_properties { 114 bool supported; 115 bool (*process_transaction)( 116 struct dc_link *link, 117 struct hdcp_protection_message *message_info); 118 }; 119 120 static const struct protection_properties non_supported_protection = { 121 .supported = false 122 }; 123 124 static bool hdmi_14_process_transaction( 125 struct dc_link *link, 126 struct hdcp_protection_message *message_info) 127 { 128 uint8_t *buff = NULL; 129 bool result; 130 const uint8_t hdcp_i2c_addr_link_primary = 0x3a; /* 0x74 >> 1*/ 131 const uint8_t hdcp_i2c_addr_link_secondary = 0x3b; /* 0x76 >> 1*/ 132 struct i2c_command i2c_command; 133 uint8_t offset; 134 struct i2c_payload i2c_payloads[] = { 135 { true, 0, 1, 0 }, 136 /* actual hdcp payload, will be filled later, zeroed for now*/ 137 { 0 } 138 }; 139 140 if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) { 141 DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id); 142 return false; 143 } 144 145 offset = hdcp_i2c_offsets[message_info->msg_id]; 146 i2c_payloads[0].data = &offset; 147 148 switch (message_info->link) { 149 case HDCP_LINK_SECONDARY: 150 i2c_payloads[0].address = hdcp_i2c_addr_link_secondary; 151 i2c_payloads[1].address = hdcp_i2c_addr_link_secondary; 152 break; 153 case HDCP_LINK_PRIMARY: 154 default: 155 i2c_payloads[0].address = hdcp_i2c_addr_link_primary; 156 i2c_payloads[1].address = hdcp_i2c_addr_link_primary; 157 break; 158 } 159 160 if (hdcp_cmd_is_read[message_info->msg_id]) { 161 i2c_payloads[1].write = false; 162 i2c_command.number_of_payloads = ARRAY_SIZE(i2c_payloads); 163 i2c_payloads[1].length = message_info->length; 164 i2c_payloads[1].data = message_info->data; 165 } else { 166 i2c_command.number_of_payloads = 1; 167 buff = kzalloc(message_info->length + 1, GFP_KERNEL); 168 169 if (!buff) 170 return false; 171 172 buff[0] = offset; 173 memmove(&buff[1], message_info->data, message_info->length); 174 i2c_payloads[0].length = message_info->length + 1; 175 i2c_payloads[0].data = buff; 176 } 177 178 i2c_command.payloads = i2c_payloads; 179 i2c_command.engine = I2C_COMMAND_ENGINE_HW;//only HW 180 i2c_command.speed = link->ddc->ctx->dc->caps.i2c_speed_in_khz; 181 182 result = dm_helpers_submit_i2c( 183 link->ctx, 184 link, 185 &i2c_command); 186 kfree(buff); 187 188 return result; 189 } 190 191 static const struct protection_properties hdmi_14_protection = { 192 .supported = true, 193 .process_transaction = hdmi_14_process_transaction 194 }; 195 196 static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = { 197 [HDCP_MESSAGE_ID_READ_BKSV] = 0x68000, 198 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x68005, 199 [HDCP_MESSAGE_ID_READ_PJ] = 0xFFFFFFFF, 200 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x68007, 201 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x6803B, 202 [HDCP_MESSAGE_ID_WRITE_AN] = 0x6800c, 203 [HDCP_MESSAGE_ID_READ_VH_X] = 0x68014, 204 [HDCP_MESSAGE_ID_READ_VH_0] = 0x68014, 205 [HDCP_MESSAGE_ID_READ_VH_1] = 0x68018, 206 [HDCP_MESSAGE_ID_READ_VH_2] = 0x6801c, 207 [HDCP_MESSAGE_ID_READ_VH_3] = 0x68020, 208 [HDCP_MESSAGE_ID_READ_VH_4] = 0x68024, 209 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x68028, 210 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x68029, 211 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x6802c, 212 [HDCP_MESSAGE_ID_READ_BINFO] = 0x6802a, 213 [HDCP_MESSAGE_ID_RX_CAPS] = 0x6921d, 214 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x69000, 215 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x6900b, 216 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x69220, 217 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x692a0, 218 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x692c0, 219 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x692e0, 220 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x692f0, 221 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x692f8, 222 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x69318, 223 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x69330, 224 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x693e0, 225 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x693f0, 226 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x69473, 227 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x69493, 228 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x69494 229 }; 230 231 static bool dpcd_access_helper( 232 struct dc_link *link, 233 uint32_t length, 234 uint8_t *data, 235 uint32_t dpcd_addr, 236 bool is_read) 237 { 238 enum dc_status status; 239 uint32_t cur_length = 0; 240 uint32_t offset = 0; 241 uint32_t ksv_read_size = 0x6803b - 0x6802c; 242 243 /* Read KSV, need repeatedly handle */ 244 if (dpcd_addr == 0x6802c) { 245 if (length % HDCP14_KSV_SIZE) { 246 DC_LOG_ERROR("%s: KsvFifo Size(%d) is not a multiple of HDCP14_KSV_SIZE(%d)\n", 247 __func__, 248 length, 249 HDCP14_KSV_SIZE); 250 } 251 if (length > HDCP14_MAX_KSV_FIFO_SIZE) { 252 DC_LOG_ERROR("%s: KsvFifo Size(%d) is greater than HDCP14_MAX_KSV_FIFO_SIZE(%d)\n", 253 __func__, 254 length, 255 HDCP14_MAX_KSV_FIFO_SIZE); 256 } 257 258 DC_LOG_ERROR("%s: Reading %d Ksv(s) from KsvFifo\n", 259 __func__, 260 length / HDCP14_KSV_SIZE); 261 262 while (length > 0) { 263 if (length > ksv_read_size) { 264 status = core_link_read_dpcd( 265 link, 266 dpcd_addr + offset, 267 data + offset, 268 ksv_read_size); 269 270 data += ksv_read_size; 271 length -= ksv_read_size; 272 } else { 273 status = core_link_read_dpcd( 274 link, 275 dpcd_addr + offset, 276 data + offset, 277 length); 278 279 data += length; 280 length = 0; 281 } 282 283 if (status != DC_OK) 284 return false; 285 } 286 } else { 287 while (length > 0) { 288 if (length > DEFAULT_AUX_MAX_DATA_SIZE) 289 cur_length = DEFAULT_AUX_MAX_DATA_SIZE; 290 else 291 cur_length = length; 292 293 if (is_read) { 294 status = core_link_read_dpcd( 295 link, 296 dpcd_addr + offset, 297 data + offset, 298 cur_length); 299 } else { 300 status = core_link_write_dpcd( 301 link, 302 dpcd_addr + offset, 303 data + offset, 304 cur_length); 305 } 306 307 if (status != DC_OK) 308 return false; 309 310 length -= cur_length; 311 offset += cur_length; 312 } 313 } 314 return true; 315 } 316 317 static bool dp_11_process_transaction( 318 struct dc_link *link, 319 struct hdcp_protection_message *message_info) 320 { 321 if (message_info->msg_id == HDCP_MESSAGE_ID_INVALID) { 322 DC_LOG_ERROR("%s: Invalid message_info msg_id - %d\n", __func__, message_info->msg_id); 323 return false; 324 } 325 326 return dpcd_access_helper( 327 link, 328 message_info->length, 329 message_info->data, 330 hdcp_dpcd_addrs[message_info->msg_id], 331 hdcp_cmd_is_read[message_info->msg_id]); 332 } 333 334 static const struct protection_properties dp_11_protection = { 335 .supported = true, 336 .process_transaction = dp_11_process_transaction 337 }; 338 339 static const struct protection_properties *get_protection_properties_by_signal( 340 struct dc_link *link, 341 enum signal_type st, 342 enum hdcp_version version) 343 { 344 switch (version) { 345 case HDCP_VERSION_14: 346 switch (st) { 347 case SIGNAL_TYPE_DVI_SINGLE_LINK: 348 case SIGNAL_TYPE_DVI_DUAL_LINK: 349 case SIGNAL_TYPE_HDMI_TYPE_A: 350 return &hdmi_14_protection; 351 case SIGNAL_TYPE_DISPLAY_PORT: 352 if (link && 353 (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER || 354 link->dpcd_caps.dongle_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER)) { 355 return &non_supported_protection; 356 } 357 return &dp_11_protection; 358 case SIGNAL_TYPE_DISPLAY_PORT_MST: 359 case SIGNAL_TYPE_EDP: 360 return &dp_11_protection; 361 default: 362 return &non_supported_protection; 363 } 364 break; 365 case HDCP_VERSION_22: 366 switch (st) { 367 case SIGNAL_TYPE_DVI_SINGLE_LINK: 368 case SIGNAL_TYPE_DVI_DUAL_LINK: 369 case SIGNAL_TYPE_HDMI_TYPE_A: 370 return &hdmi_14_protection; //todo version2.2 371 case SIGNAL_TYPE_DISPLAY_PORT: 372 case SIGNAL_TYPE_DISPLAY_PORT_MST: 373 case SIGNAL_TYPE_EDP: 374 return &dp_11_protection; //todo version2.2 375 default: 376 return &non_supported_protection; 377 } 378 break; 379 default: 380 return &non_supported_protection; 381 } 382 } 383 384 enum hdcp_message_status dc_process_hdcp_msg( 385 enum signal_type signal, 386 struct dc_link *link, 387 struct hdcp_protection_message *message_info) 388 { 389 enum hdcp_message_status status = HDCP_MESSAGE_FAILURE; 390 uint32_t i = 0; 391 392 const struct protection_properties *protection_props; 393 394 if (!message_info) 395 return HDCP_MESSAGE_UNSUPPORTED; 396 397 if (message_info->msg_id < HDCP_MESSAGE_ID_READ_BKSV || 398 message_info->msg_id >= HDCP_MESSAGE_ID_MAX) 399 return HDCP_MESSAGE_UNSUPPORTED; 400 401 protection_props = 402 get_protection_properties_by_signal( 403 link, 404 signal, 405 message_info->version); 406 407 if (!protection_props->supported) 408 return HDCP_MESSAGE_UNSUPPORTED; 409 410 if (protection_props->process_transaction( 411 link, 412 message_info)) { 413 status = HDCP_MESSAGE_SUCCESS; 414 } else { 415 for (i = 0; i < message_info->max_retries; i++) { 416 if (protection_props->process_transaction( 417 link, 418 message_info)) { 419 status = HDCP_MESSAGE_SUCCESS; 420 break; 421 } 422 } 423 } 424 425 return status; 426 } 427 428