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 40 static 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 76 static 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 }; 110 111 struct protection_properties { 112 bool supported; 113 bool (*process_transaction)( 114 struct dc_link *link, 115 struct hdcp_protection_message *message_info); 116 }; 117 118 static const struct protection_properties non_supported_protection = { 119 .supported = false 120 }; 121 122 static 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 = hdcp_i2c_offsets[message_info->msg_id]; 132 struct i2c_payload i2c_payloads[] = { 133 { true, 0, 1, &offset }, 134 /* actual hdcp payload, will be filled later, zeroed for now*/ 135 { 0 } 136 }; 137 138 switch (message_info->link) { 139 case HDCP_LINK_SECONDARY: 140 i2c_payloads[0].address = hdcp_i2c_addr_link_secondary; 141 i2c_payloads[1].address = hdcp_i2c_addr_link_secondary; 142 break; 143 case HDCP_LINK_PRIMARY: 144 default: 145 i2c_payloads[0].address = hdcp_i2c_addr_link_primary; 146 i2c_payloads[1].address = hdcp_i2c_addr_link_primary; 147 break; 148 } 149 150 if (hdcp_cmd_is_read[message_info->msg_id]) { 151 i2c_payloads[1].write = false; 152 i2c_command.number_of_payloads = ARRAY_SIZE(i2c_payloads); 153 i2c_payloads[1].length = message_info->length; 154 i2c_payloads[1].data = message_info->data; 155 } else { 156 i2c_command.number_of_payloads = 1; 157 buff = kzalloc(message_info->length + 1, GFP_KERNEL); 158 159 if (!buff) 160 return false; 161 162 buff[0] = offset; 163 memmove(&buff[1], message_info->data, message_info->length); 164 i2c_payloads[0].length = message_info->length + 1; 165 i2c_payloads[0].data = buff; 166 } 167 168 i2c_command.payloads = i2c_payloads; 169 i2c_command.engine = I2C_COMMAND_ENGINE_HW;//only HW 170 i2c_command.speed = link->ddc->ctx->dc->caps.i2c_speed_in_khz; 171 172 result = dm_helpers_submit_i2c( 173 link->ctx, 174 link, 175 &i2c_command); 176 kfree(buff); 177 178 return result; 179 } 180 181 static const struct protection_properties hdmi_14_protection = { 182 .supported = true, 183 .process_transaction = hdmi_14_process_transaction 184 }; 185 186 static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = { 187 [HDCP_MESSAGE_ID_READ_BKSV] = 0x68000, 188 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x68005, 189 [HDCP_MESSAGE_ID_READ_PJ] = 0xFFFFFFFF, 190 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x68007, 191 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x6803B, 192 [HDCP_MESSAGE_ID_WRITE_AN] = 0x6800c, 193 [HDCP_MESSAGE_ID_READ_VH_X] = 0x68014, 194 [HDCP_MESSAGE_ID_READ_VH_0] = 0x68014, 195 [HDCP_MESSAGE_ID_READ_VH_1] = 0x68018, 196 [HDCP_MESSAGE_ID_READ_VH_2] = 0x6801c, 197 [HDCP_MESSAGE_ID_READ_VH_3] = 0x68020, 198 [HDCP_MESSAGE_ID_READ_VH_4] = 0x68024, 199 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x68028, 200 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x68029, 201 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x6802c, 202 [HDCP_MESSAGE_ID_READ_BINFO] = 0x6802a, 203 [HDCP_MESSAGE_ID_RX_CAPS] = 0x6921d, 204 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x69000, 205 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x6900b, 206 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x69220, 207 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x692a0, 208 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x692c0, 209 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x692e0, 210 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x692f0, 211 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x692f8, 212 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x69318, 213 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x69330, 214 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x693e0, 215 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x693f0, 216 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x69473, 217 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x69493, 218 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x69494 219 }; 220 221 static bool dpcd_access_helper( 222 struct dc_link *link, 223 uint32_t length, 224 uint8_t *data, 225 uint32_t dpcd_addr, 226 bool is_read) 227 { 228 enum dc_status status; 229 uint32_t cur_length = 0; 230 uint32_t offset = 0; 231 uint32_t ksv_read_size = 0x6803b - 0x6802c; 232 233 /* Read KSV, need repeatedly handle */ 234 if (dpcd_addr == 0x6802c) { 235 if (length % HDCP14_KSV_SIZE) { 236 DC_LOG_ERROR("%s: KsvFifo Size(%d) is not a multiple of HDCP14_KSV_SIZE(%d)\n", 237 __func__, 238 length, 239 HDCP14_KSV_SIZE); 240 } 241 if (length > HDCP14_MAX_KSV_FIFO_SIZE) { 242 DC_LOG_ERROR("%s: KsvFifo Size(%d) is greater than HDCP14_MAX_KSV_FIFO_SIZE(%d)\n", 243 __func__, 244 length, 245 HDCP14_MAX_KSV_FIFO_SIZE); 246 } 247 248 DC_LOG_ERROR("%s: Reading %d Ksv(s) from KsvFifo\n", 249 __func__, 250 length / HDCP14_KSV_SIZE); 251 252 while (length > 0) { 253 if (length > ksv_read_size) { 254 status = core_link_read_dpcd( 255 link, 256 dpcd_addr + offset, 257 data + offset, 258 ksv_read_size); 259 260 data += ksv_read_size; 261 length -= ksv_read_size; 262 } else { 263 status = core_link_read_dpcd( 264 link, 265 dpcd_addr + offset, 266 data + offset, 267 length); 268 269 data += length; 270 length = 0; 271 } 272 273 if (status != DC_OK) 274 return false; 275 } 276 } else { 277 while (length > 0) { 278 if (length > DEFAULT_AUX_MAX_DATA_SIZE) 279 cur_length = DEFAULT_AUX_MAX_DATA_SIZE; 280 else 281 cur_length = length; 282 283 if (is_read) { 284 status = core_link_read_dpcd( 285 link, 286 dpcd_addr + offset, 287 data + offset, 288 cur_length); 289 } else { 290 status = core_link_write_dpcd( 291 link, 292 dpcd_addr + offset, 293 data + offset, 294 cur_length); 295 } 296 297 if (status != DC_OK) 298 return false; 299 300 length -= cur_length; 301 offset += cur_length; 302 } 303 } 304 return true; 305 } 306 307 static bool dp_11_process_transaction( 308 struct dc_link *link, 309 struct hdcp_protection_message *message_info) 310 { 311 return dpcd_access_helper( 312 link, 313 message_info->length, 314 message_info->data, 315 hdcp_dpcd_addrs[message_info->msg_id], 316 hdcp_cmd_is_read[message_info->msg_id]); 317 } 318 319 static const struct protection_properties dp_11_protection = { 320 .supported = true, 321 .process_transaction = dp_11_process_transaction 322 }; 323 324 static const struct protection_properties *get_protection_properties_by_signal( 325 struct dc_link *link, 326 enum signal_type st, 327 enum hdcp_version version) 328 { 329 switch (version) { 330 case HDCP_VERSION_14: 331 switch (st) { 332 case SIGNAL_TYPE_DVI_SINGLE_LINK: 333 case SIGNAL_TYPE_DVI_DUAL_LINK: 334 case SIGNAL_TYPE_HDMI_TYPE_A: 335 return &hdmi_14_protection; 336 case SIGNAL_TYPE_DISPLAY_PORT: 337 if (link && 338 (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER || 339 link->dpcd_caps.dongle_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER)) { 340 return &non_supported_protection; 341 } 342 return &dp_11_protection; 343 case SIGNAL_TYPE_DISPLAY_PORT_MST: 344 case SIGNAL_TYPE_EDP: 345 return &dp_11_protection; 346 default: 347 return &non_supported_protection; 348 } 349 break; 350 case HDCP_VERSION_22: 351 switch (st) { 352 case SIGNAL_TYPE_DVI_SINGLE_LINK: 353 case SIGNAL_TYPE_DVI_DUAL_LINK: 354 case SIGNAL_TYPE_HDMI_TYPE_A: 355 return &hdmi_14_protection; //todo version2.2 356 case SIGNAL_TYPE_DISPLAY_PORT: 357 case SIGNAL_TYPE_DISPLAY_PORT_MST: 358 case SIGNAL_TYPE_EDP: 359 return &dp_11_protection; //todo version2.2 360 default: 361 return &non_supported_protection; 362 } 363 break; 364 default: 365 return &non_supported_protection; 366 } 367 } 368 369 enum hdcp_message_status dc_process_hdcp_msg( 370 enum signal_type signal, 371 struct dc_link *link, 372 struct hdcp_protection_message *message_info) 373 { 374 enum hdcp_message_status status = HDCP_MESSAGE_FAILURE; 375 uint32_t i = 0; 376 377 const struct protection_properties *protection_props; 378 379 if (!message_info) 380 return HDCP_MESSAGE_UNSUPPORTED; 381 382 if (message_info->msg_id < HDCP_MESSAGE_ID_READ_BKSV || 383 message_info->msg_id >= HDCP_MESSAGE_ID_MAX) 384 return HDCP_MESSAGE_UNSUPPORTED; 385 386 protection_props = 387 get_protection_properties_by_signal( 388 link, 389 signal, 390 message_info->version); 391 392 if (!protection_props->supported) 393 return HDCP_MESSAGE_UNSUPPORTED; 394 395 if (protection_props->process_transaction( 396 link, 397 message_info)) { 398 status = HDCP_MESSAGE_SUCCESS; 399 } else { 400 for (i = 0; i < message_info->max_retries; i++) { 401 if (protection_props->process_transaction( 402 link, 403 message_info)) { 404 status = HDCP_MESSAGE_SUCCESS; 405 break; 406 } 407 } 408 } 409 410 return status; 411 } 412 413