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_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/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 = hdcp_i2c_offsets[message_info->msg_id]; 134 struct i2c_payload i2c_payloads[] = { 135 { true, 0, 1, &offset }, 136 /* actual hdcp payload, will be filled later, zeroed for now*/ 137 { 0 } 138 }; 139 140 switch (message_info->link) { 141 case HDCP_LINK_SECONDARY: 142 i2c_payloads[0].address = hdcp_i2c_addr_link_secondary; 143 i2c_payloads[1].address = hdcp_i2c_addr_link_secondary; 144 break; 145 case HDCP_LINK_PRIMARY: 146 default: 147 i2c_payloads[0].address = hdcp_i2c_addr_link_primary; 148 i2c_payloads[1].address = hdcp_i2c_addr_link_primary; 149 break; 150 } 151 152 if (hdcp_cmd_is_read[message_info->msg_id]) { 153 i2c_payloads[1].write = false; 154 i2c_command.number_of_payloads = ARRAY_SIZE(i2c_payloads); 155 i2c_payloads[1].length = message_info->length; 156 i2c_payloads[1].data = message_info->data; 157 } else { 158 i2c_command.number_of_payloads = 1; 159 buff = kzalloc(message_info->length + 1, GFP_KERNEL); 160 161 if (!buff) 162 return false; 163 164 buff[0] = offset; 165 memmove(&buff[1], message_info->data, message_info->length); 166 i2c_payloads[0].length = message_info->length + 1; 167 i2c_payloads[0].data = buff; 168 } 169 170 i2c_command.payloads = i2c_payloads; 171 i2c_command.engine = I2C_COMMAND_ENGINE_HW;//only HW 172 i2c_command.speed = link->ddc->ctx->dc->caps.i2c_speed_in_khz; 173 174 result = dm_helpers_submit_i2c( 175 link->ctx, 176 link, 177 &i2c_command); 178 kfree(buff); 179 180 return result; 181 } 182 183 static const struct protection_properties hdmi_14_protection = { 184 .supported = true, 185 .process_transaction = hdmi_14_process_transaction 186 }; 187 188 static const uint32_t hdcp_dpcd_addrs[HDCP_MESSAGE_ID_MAX] = { 189 [HDCP_MESSAGE_ID_READ_BKSV] = 0x68000, 190 [HDCP_MESSAGE_ID_READ_RI_R0] = 0x68005, 191 [HDCP_MESSAGE_ID_READ_PJ] = 0xFFFFFFFF, 192 [HDCP_MESSAGE_ID_WRITE_AKSV] = 0x68007, 193 [HDCP_MESSAGE_ID_WRITE_AINFO] = 0x6803B, 194 [HDCP_MESSAGE_ID_WRITE_AN] = 0x6800c, 195 [HDCP_MESSAGE_ID_READ_VH_X] = 0x68014, 196 [HDCP_MESSAGE_ID_READ_VH_0] = 0x68014, 197 [HDCP_MESSAGE_ID_READ_VH_1] = 0x68018, 198 [HDCP_MESSAGE_ID_READ_VH_2] = 0x6801c, 199 [HDCP_MESSAGE_ID_READ_VH_3] = 0x68020, 200 [HDCP_MESSAGE_ID_READ_VH_4] = 0x68024, 201 [HDCP_MESSAGE_ID_READ_BCAPS] = 0x68028, 202 [HDCP_MESSAGE_ID_READ_BSTATUS] = 0x68029, 203 [HDCP_MESSAGE_ID_READ_KSV_FIFO] = 0x6802c, 204 [HDCP_MESSAGE_ID_READ_BINFO] = 0x6802a, 205 [HDCP_MESSAGE_ID_RX_CAPS] = 0x6921d, 206 [HDCP_MESSAGE_ID_WRITE_AKE_INIT] = 0x69000, 207 [HDCP_MESSAGE_ID_READ_AKE_SEND_CERT] = 0x6900b, 208 [HDCP_MESSAGE_ID_WRITE_AKE_NO_STORED_KM] = 0x69220, 209 [HDCP_MESSAGE_ID_WRITE_AKE_STORED_KM] = 0x692a0, 210 [HDCP_MESSAGE_ID_READ_AKE_SEND_H_PRIME] = 0x692c0, 211 [HDCP_MESSAGE_ID_READ_AKE_SEND_PAIRING_INFO] = 0x692e0, 212 [HDCP_MESSAGE_ID_WRITE_LC_INIT] = 0x692f0, 213 [HDCP_MESSAGE_ID_READ_LC_SEND_L_PRIME] = 0x692f8, 214 [HDCP_MESSAGE_ID_WRITE_SKE_SEND_EKS] = 0x69318, 215 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_SEND_RECEIVERID_LIST] = 0x69330, 216 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_SEND_ACK] = 0x693e0, 217 [HDCP_MESSAGE_ID_WRITE_REPEATER_AUTH_STREAM_MANAGE] = 0x693f0, 218 [HDCP_MESSAGE_ID_READ_REPEATER_AUTH_STREAM_READY] = 0x69473, 219 [HDCP_MESSAGE_ID_READ_RXSTATUS] = 0x69493, 220 [HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE] = 0x69494 221 }; 222 223 static bool dpcd_access_helper( 224 struct dc_link *link, 225 uint32_t length, 226 uint8_t *data, 227 uint32_t dpcd_addr, 228 bool is_read) 229 { 230 enum dc_status status; 231 uint32_t cur_length = 0; 232 uint32_t offset = 0; 233 uint32_t ksv_read_size = 0x6803b - 0x6802c; 234 235 /* Read KSV, need repeatedly handle */ 236 if (dpcd_addr == 0x6802c) { 237 if (length % HDCP14_KSV_SIZE) { 238 DC_LOG_ERROR("%s: KsvFifo Size(%d) is not a multiple of HDCP14_KSV_SIZE(%d)\n", 239 __func__, 240 length, 241 HDCP14_KSV_SIZE); 242 } 243 if (length > HDCP14_MAX_KSV_FIFO_SIZE) { 244 DC_LOG_ERROR("%s: KsvFifo Size(%d) is greater than HDCP14_MAX_KSV_FIFO_SIZE(%d)\n", 245 __func__, 246 length, 247 HDCP14_MAX_KSV_FIFO_SIZE); 248 } 249 250 DC_LOG_ERROR("%s: Reading %d Ksv(s) from KsvFifo\n", 251 __func__, 252 length / HDCP14_KSV_SIZE); 253 254 while (length > 0) { 255 if (length > ksv_read_size) { 256 status = core_link_read_dpcd( 257 link, 258 dpcd_addr + offset, 259 data + offset, 260 ksv_read_size); 261 262 data += ksv_read_size; 263 length -= ksv_read_size; 264 } else { 265 status = core_link_read_dpcd( 266 link, 267 dpcd_addr + offset, 268 data + offset, 269 length); 270 271 data += length; 272 length = 0; 273 } 274 275 if (status != DC_OK) 276 return false; 277 } 278 } else { 279 while (length > 0) { 280 if (length > DEFAULT_AUX_MAX_DATA_SIZE) 281 cur_length = DEFAULT_AUX_MAX_DATA_SIZE; 282 else 283 cur_length = length; 284 285 if (is_read) { 286 status = core_link_read_dpcd( 287 link, 288 dpcd_addr + offset, 289 data + offset, 290 cur_length); 291 } else { 292 status = core_link_write_dpcd( 293 link, 294 dpcd_addr + offset, 295 data + offset, 296 cur_length); 297 } 298 299 if (status != DC_OK) 300 return false; 301 302 length -= cur_length; 303 offset += cur_length; 304 } 305 } 306 return true; 307 } 308 309 static bool dp_11_process_transaction( 310 struct dc_link *link, 311 struct hdcp_protection_message *message_info) 312 { 313 return dpcd_access_helper( 314 link, 315 message_info->length, 316 message_info->data, 317 hdcp_dpcd_addrs[message_info->msg_id], 318 hdcp_cmd_is_read[message_info->msg_id]); 319 } 320 321 static const struct protection_properties dp_11_protection = { 322 .supported = true, 323 .process_transaction = dp_11_process_transaction 324 }; 325 326 static const struct protection_properties *get_protection_properties_by_signal( 327 struct dc_link *link, 328 enum signal_type st, 329 enum hdcp_version version) 330 { 331 switch (version) { 332 case HDCP_VERSION_14: 333 switch (st) { 334 case SIGNAL_TYPE_DVI_SINGLE_LINK: 335 case SIGNAL_TYPE_DVI_DUAL_LINK: 336 case SIGNAL_TYPE_HDMI_TYPE_A: 337 return &hdmi_14_protection; 338 case SIGNAL_TYPE_DISPLAY_PORT: 339 if (link && 340 (link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER || 341 link->dpcd_caps.dongle_caps.dongle_type == DISPLAY_DONGLE_DP_VGA_CONVERTER)) { 342 return &non_supported_protection; 343 } 344 return &dp_11_protection; 345 case SIGNAL_TYPE_DISPLAY_PORT_MST: 346 case SIGNAL_TYPE_EDP: 347 return &dp_11_protection; 348 default: 349 return &non_supported_protection; 350 } 351 break; 352 case HDCP_VERSION_22: 353 switch (st) { 354 case SIGNAL_TYPE_DVI_SINGLE_LINK: 355 case SIGNAL_TYPE_DVI_DUAL_LINK: 356 case SIGNAL_TYPE_HDMI_TYPE_A: 357 return &hdmi_14_protection; //todo version2.2 358 case SIGNAL_TYPE_DISPLAY_PORT: 359 case SIGNAL_TYPE_DISPLAY_PORT_MST: 360 case SIGNAL_TYPE_EDP: 361 return &dp_11_protection; //todo version2.2 362 default: 363 return &non_supported_protection; 364 } 365 break; 366 default: 367 return &non_supported_protection; 368 } 369 } 370 371 enum hdcp_message_status dc_process_hdcp_msg( 372 enum signal_type signal, 373 struct dc_link *link, 374 struct hdcp_protection_message *message_info) 375 { 376 enum hdcp_message_status status = HDCP_MESSAGE_FAILURE; 377 uint32_t i = 0; 378 379 const struct protection_properties *protection_props; 380 381 if (!message_info) 382 return HDCP_MESSAGE_UNSUPPORTED; 383 384 if (message_info->msg_id < HDCP_MESSAGE_ID_READ_BKSV || 385 message_info->msg_id >= HDCP_MESSAGE_ID_MAX) 386 return HDCP_MESSAGE_UNSUPPORTED; 387 388 protection_props = 389 get_protection_properties_by_signal( 390 link, 391 signal, 392 message_info->version); 393 394 if (!protection_props->supported) 395 return HDCP_MESSAGE_UNSUPPORTED; 396 397 if (protection_props->process_transaction( 398 link, 399 message_info)) { 400 status = HDCP_MESSAGE_SUCCESS; 401 } else { 402 for (i = 0; i < message_info->max_retries; i++) { 403 if (protection_props->process_transaction( 404 link, 405 message_info)) { 406 status = HDCP_MESSAGE_SUCCESS; 407 break; 408 } 409 } 410 } 411 412 return status; 413 } 414 415