1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2021, Intel Corporation. */ 3 4 #include <linux/delay.h> 5 #include <linux/iopoll.h> 6 #include "ice_common.h" 7 #include "ice_ptp_hw.h" 8 #include "ice_ptp_consts.h" 9 #include "ice_cgu_regs.h" 10 11 static struct dpll_pin_frequency ice_cgu_pin_freq_common[] = { 12 DPLL_PIN_FREQUENCY_1PPS, 13 DPLL_PIN_FREQUENCY_10MHZ, 14 }; 15 16 static struct dpll_pin_frequency ice_cgu_pin_freq_1_hz[] = { 17 DPLL_PIN_FREQUENCY_1PPS, 18 }; 19 20 static struct dpll_pin_frequency ice_cgu_pin_freq_10_mhz[] = { 21 DPLL_PIN_FREQUENCY_10MHZ, 22 }; 23 24 static const struct ice_cgu_pin_desc ice_e810t_sfp_cgu_inputs[] = { 25 { "CVL-SDP22", ZL_REF0P, DPLL_PIN_TYPE_INT_OSCILLATOR, 26 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 27 { "CVL-SDP20", ZL_REF0N, DPLL_PIN_TYPE_INT_OSCILLATOR, 28 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 29 { "C827_0-RCLKA", ZL_REF1P, DPLL_PIN_TYPE_MUX, 0, }, 30 { "C827_0-RCLKB", ZL_REF1N, DPLL_PIN_TYPE_MUX, 0, }, 31 { "SMA1", ZL_REF3P, DPLL_PIN_TYPE_EXT, 32 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 33 { "SMA2/U.FL2", ZL_REF3N, DPLL_PIN_TYPE_EXT, 34 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 35 { "GNSS-1PPS", ZL_REF4P, DPLL_PIN_TYPE_GNSS, 36 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 37 }; 38 39 static const struct ice_cgu_pin_desc ice_e810t_qsfp_cgu_inputs[] = { 40 { "CVL-SDP22", ZL_REF0P, DPLL_PIN_TYPE_INT_OSCILLATOR, 41 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 42 { "CVL-SDP20", ZL_REF0N, DPLL_PIN_TYPE_INT_OSCILLATOR, 43 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 44 { "C827_0-RCLKA", ZL_REF1P, DPLL_PIN_TYPE_MUX, }, 45 { "C827_0-RCLKB", ZL_REF1N, DPLL_PIN_TYPE_MUX, }, 46 { "C827_1-RCLKA", ZL_REF2P, DPLL_PIN_TYPE_MUX, }, 47 { "C827_1-RCLKB", ZL_REF2N, DPLL_PIN_TYPE_MUX, }, 48 { "SMA1", ZL_REF3P, DPLL_PIN_TYPE_EXT, 49 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 50 { "SMA2/U.FL2", ZL_REF3N, DPLL_PIN_TYPE_EXT, 51 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 52 { "GNSS-1PPS", ZL_REF4P, DPLL_PIN_TYPE_GNSS, 53 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 54 }; 55 56 static const struct ice_cgu_pin_desc ice_e810t_sfp_cgu_outputs[] = { 57 { "REF-SMA1", ZL_OUT0, DPLL_PIN_TYPE_EXT, 58 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 59 { "REF-SMA2/U.FL2", ZL_OUT1, DPLL_PIN_TYPE_EXT, 60 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 61 { "PHY-CLK", ZL_OUT2, DPLL_PIN_TYPE_SYNCE_ETH_PORT, }, 62 { "MAC-CLK", ZL_OUT3, DPLL_PIN_TYPE_SYNCE_ETH_PORT, }, 63 { "CVL-SDP21", ZL_OUT4, DPLL_PIN_TYPE_EXT, 64 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 65 { "CVL-SDP23", ZL_OUT5, DPLL_PIN_TYPE_EXT, 66 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 67 }; 68 69 static const struct ice_cgu_pin_desc ice_e810t_qsfp_cgu_outputs[] = { 70 { "REF-SMA1", ZL_OUT0, DPLL_PIN_TYPE_EXT, 71 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 72 { "REF-SMA2/U.FL2", ZL_OUT1, DPLL_PIN_TYPE_EXT, 73 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 74 { "PHY-CLK", ZL_OUT2, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 75 { "PHY2-CLK", ZL_OUT3, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 76 { "MAC-CLK", ZL_OUT4, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 77 { "CVL-SDP21", ZL_OUT5, DPLL_PIN_TYPE_EXT, 78 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 79 { "CVL-SDP23", ZL_OUT6, DPLL_PIN_TYPE_EXT, 80 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 81 }; 82 83 static const struct ice_cgu_pin_desc ice_e823_si_cgu_inputs[] = { 84 { "NONE", SI_REF0P, 0, 0 }, 85 { "NONE", SI_REF0N, 0, 0 }, 86 { "SYNCE0_DP", SI_REF1P, DPLL_PIN_TYPE_MUX, 0 }, 87 { "SYNCE0_DN", SI_REF1N, DPLL_PIN_TYPE_MUX, 0 }, 88 { "EXT_CLK_SYNC", SI_REF2P, DPLL_PIN_TYPE_EXT, 89 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 90 { "NONE", SI_REF2N, 0, 0 }, 91 { "EXT_PPS_OUT", SI_REF3, DPLL_PIN_TYPE_EXT, 92 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 93 { "INT_PPS_OUT", SI_REF4, DPLL_PIN_TYPE_EXT, 94 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 95 }; 96 97 static const struct ice_cgu_pin_desc ice_e823_si_cgu_outputs[] = { 98 { "1588-TIME_SYNC", SI_OUT0, DPLL_PIN_TYPE_EXT, 99 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 100 { "PHY-CLK", SI_OUT1, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 101 { "10MHZ-SMA2", SI_OUT2, DPLL_PIN_TYPE_EXT, 102 ARRAY_SIZE(ice_cgu_pin_freq_10_mhz), ice_cgu_pin_freq_10_mhz }, 103 { "PPS-SMA1", SI_OUT3, DPLL_PIN_TYPE_EXT, 104 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 105 }; 106 107 static const struct ice_cgu_pin_desc ice_e823_zl_cgu_inputs[] = { 108 { "NONE", ZL_REF0P, 0, 0 }, 109 { "INT_PPS_OUT", ZL_REF0N, DPLL_PIN_TYPE_EXT, 110 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 111 { "SYNCE0_DP", ZL_REF1P, DPLL_PIN_TYPE_MUX, 0 }, 112 { "SYNCE0_DN", ZL_REF1N, DPLL_PIN_TYPE_MUX, 0 }, 113 { "NONE", ZL_REF2P, 0, 0 }, 114 { "NONE", ZL_REF2N, 0, 0 }, 115 { "EXT_CLK_SYNC", ZL_REF3P, DPLL_PIN_TYPE_EXT, 116 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 117 { "NONE", ZL_REF3N, 0, 0 }, 118 { "EXT_PPS_OUT", ZL_REF4P, DPLL_PIN_TYPE_EXT, 119 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 120 { "OCXO", ZL_REF4N, DPLL_PIN_TYPE_INT_OSCILLATOR, 0 }, 121 }; 122 123 static const struct ice_cgu_pin_desc ice_e823_zl_cgu_outputs[] = { 124 { "PPS-SMA1", ZL_OUT0, DPLL_PIN_TYPE_EXT, 125 ARRAY_SIZE(ice_cgu_pin_freq_1_hz), ice_cgu_pin_freq_1_hz }, 126 { "10MHZ-SMA2", ZL_OUT1, DPLL_PIN_TYPE_EXT, 127 ARRAY_SIZE(ice_cgu_pin_freq_10_mhz), ice_cgu_pin_freq_10_mhz }, 128 { "PHY-CLK", ZL_OUT2, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 129 { "1588-TIME_REF", ZL_OUT3, DPLL_PIN_TYPE_SYNCE_ETH_PORT, 0 }, 130 { "CPK-TIME_SYNC", ZL_OUT4, DPLL_PIN_TYPE_EXT, 131 ARRAY_SIZE(ice_cgu_pin_freq_common), ice_cgu_pin_freq_common }, 132 { "NONE", ZL_OUT5, 0, 0 }, 133 }; 134 135 /* Low level functions for interacting with and managing the device clock used 136 * for the Precision Time Protocol. 137 * 138 * The ice hardware represents the current time using three registers: 139 * 140 * GLTSYN_TIME_H GLTSYN_TIME_L GLTSYN_TIME_R 141 * +---------------+ +---------------+ +---------------+ 142 * | 32 bits | | 32 bits | | 32 bits | 143 * +---------------+ +---------------+ +---------------+ 144 * 145 * The registers are incremented every clock tick using a 40bit increment 146 * value defined over two registers: 147 * 148 * GLTSYN_INCVAL_H GLTSYN_INCVAL_L 149 * +---------------+ +---------------+ 150 * | 8 bit s | | 32 bits | 151 * +---------------+ +---------------+ 152 * 153 * The increment value is added to the GLSTYN_TIME_R and GLSTYN_TIME_L 154 * registers every clock source tick. Depending on the specific device 155 * configuration, the clock source frequency could be one of a number of 156 * values. 157 * 158 * For E810 devices, the increment frequency is 812.5 MHz 159 * 160 * For E822 devices the clock can be derived from different sources, and the 161 * increment has an effective frequency of one of the following: 162 * - 823.4375 MHz 163 * - 783.36 MHz 164 * - 796.875 MHz 165 * - 816 MHz 166 * - 830.078125 MHz 167 * - 783.36 MHz 168 * 169 * The hardware captures timestamps in the PHY for incoming packets, and for 170 * outgoing packets on request. To support this, the PHY maintains a timer 171 * that matches the lower 64 bits of the global source timer. 172 * 173 * In order to ensure that the PHY timers and the source timer are equivalent, 174 * shadow registers are used to prepare the desired initial values. A special 175 * sync command is issued to trigger copying from the shadow registers into 176 * the appropriate source and PHY registers simultaneously. 177 * 178 * The driver supports devices which have different PHYs with subtly different 179 * mechanisms to program and control the timers. We divide the devices into 180 * families named after the first major device, E810 and similar devices, and 181 * E822 and similar devices. 182 * 183 * - E822 based devices have additional support for fine grained Vernier 184 * calibration which requires significant setup 185 * - The layout of timestamp data in the PHY register blocks is different 186 * - The way timer synchronization commands are issued is different. 187 * 188 * To support this, very low level functions have an e810 or e822 suffix 189 * indicating what type of device they work on. Higher level abstractions for 190 * tasks that can be done on both devices do not have the suffix and will 191 * correctly look up the appropriate low level function when running. 192 * 193 * Functions which only make sense on a single device family may not have 194 * a suitable generic implementation 195 */ 196 197 /** 198 * ice_get_ptp_src_clock_index - determine source clock index 199 * @hw: pointer to HW struct 200 * 201 * Determine the source clock index currently in use, based on device 202 * capabilities reported during initialization. 203 */ 204 u8 ice_get_ptp_src_clock_index(struct ice_hw *hw) 205 { 206 return hw->func_caps.ts_func_info.tmr_index_assoc; 207 } 208 209 /** 210 * ice_ptp_read_src_incval - Read source timer increment value 211 * @hw: pointer to HW struct 212 * 213 * Read the increment value of the source timer and return it. 214 */ 215 static u64 ice_ptp_read_src_incval(struct ice_hw *hw) 216 { 217 u32 lo, hi; 218 u8 tmr_idx; 219 220 tmr_idx = ice_get_ptp_src_clock_index(hw); 221 222 lo = rd32(hw, GLTSYN_INCVAL_L(tmr_idx)); 223 hi = rd32(hw, GLTSYN_INCVAL_H(tmr_idx)); 224 225 return ((u64)(hi & INCVAL_HIGH_M) << 32) | lo; 226 } 227 228 /** 229 * ice_read_cgu_reg_e82x - Read a CGU register 230 * @hw: pointer to the HW struct 231 * @addr: Register address to read 232 * @val: storage for register value read 233 * 234 * Read the contents of a register of the Clock Generation Unit. Only 235 * applicable to E822 devices. 236 * 237 * Return: 0 on success, other error codes when failed to read from CGU 238 */ 239 static int ice_read_cgu_reg_e82x(struct ice_hw *hw, u32 addr, u32 *val) 240 { 241 struct ice_sbq_msg_input cgu_msg = { 242 .opcode = ice_sbq_msg_rd, 243 .dest_dev = cgu, 244 .msg_addr_low = addr 245 }; 246 int err; 247 248 err = ice_sbq_rw_reg(hw, &cgu_msg, ICE_AQ_FLAG_RD); 249 if (err) { 250 ice_debug(hw, ICE_DBG_PTP, "Failed to read CGU register 0x%04x, err %d\n", 251 addr, err); 252 return err; 253 } 254 255 *val = cgu_msg.data; 256 257 return 0; 258 } 259 260 /** 261 * ice_write_cgu_reg_e82x - Write a CGU register 262 * @hw: pointer to the HW struct 263 * @addr: Register address to write 264 * @val: value to write into the register 265 * 266 * Write the specified value to a register of the Clock Generation Unit. Only 267 * applicable to E822 devices. 268 * 269 * Return: 0 on success, other error codes when failed to write to CGU 270 */ 271 static int ice_write_cgu_reg_e82x(struct ice_hw *hw, u32 addr, u32 val) 272 { 273 struct ice_sbq_msg_input cgu_msg = { 274 .opcode = ice_sbq_msg_wr, 275 .dest_dev = cgu, 276 .msg_addr_low = addr, 277 .data = val 278 }; 279 int err; 280 281 err = ice_sbq_rw_reg(hw, &cgu_msg, ICE_AQ_FLAG_RD); 282 if (err) { 283 ice_debug(hw, ICE_DBG_PTP, "Failed to write CGU register 0x%04x, err %d\n", 284 addr, err); 285 return err; 286 } 287 288 return err; 289 } 290 291 /** 292 * ice_clk_freq_str - Convert time_ref_freq to string 293 * @clk_freq: Clock frequency 294 * 295 * Return: specified TIME_REF clock frequency converted to a string 296 */ 297 static const char *ice_clk_freq_str(enum ice_time_ref_freq clk_freq) 298 { 299 switch (clk_freq) { 300 case ICE_TIME_REF_FREQ_25_000: 301 return "25 MHz"; 302 case ICE_TIME_REF_FREQ_122_880: 303 return "122.88 MHz"; 304 case ICE_TIME_REF_FREQ_125_000: 305 return "125 MHz"; 306 case ICE_TIME_REF_FREQ_153_600: 307 return "153.6 MHz"; 308 case ICE_TIME_REF_FREQ_156_250: 309 return "156.25 MHz"; 310 case ICE_TIME_REF_FREQ_245_760: 311 return "245.76 MHz"; 312 default: 313 return "Unknown"; 314 } 315 } 316 317 /** 318 * ice_clk_src_str - Convert time_ref_src to string 319 * @clk_src: Clock source 320 * 321 * Return: specified clock source converted to its string name 322 */ 323 static const char *ice_clk_src_str(enum ice_clk_src clk_src) 324 { 325 switch (clk_src) { 326 case ICE_CLK_SRC_TCXO: 327 return "TCXO"; 328 case ICE_CLK_SRC_TIME_REF: 329 return "TIME_REF"; 330 default: 331 return "Unknown"; 332 } 333 } 334 335 /** 336 * ice_cfg_cgu_pll_e82x - Configure the Clock Generation Unit 337 * @hw: pointer to the HW struct 338 * @clk_freq: Clock frequency to program 339 * @clk_src: Clock source to select (TIME_REF, or TCXO) 340 * 341 * Configure the Clock Generation Unit with the desired clock frequency and 342 * time reference, enabling the PLL which drives the PTP hardware clock. 343 * 344 * Return: 345 * * %0 - success 346 * * %-EINVAL - input parameters are incorrect 347 * * %-EBUSY - failed to lock TS PLL 348 * * %other - CGU read/write failure 349 */ 350 static int ice_cfg_cgu_pll_e82x(struct ice_hw *hw, 351 enum ice_time_ref_freq clk_freq, 352 enum ice_clk_src clk_src) 353 { 354 union tspll_ro_bwm_lf bwm_lf; 355 union nac_cgu_dword19 dw19; 356 union nac_cgu_dword22 dw22; 357 union nac_cgu_dword24 dw24; 358 union nac_cgu_dword9 dw9; 359 int err; 360 361 if (clk_freq >= NUM_ICE_TIME_REF_FREQ) { 362 dev_warn(ice_hw_to_dev(hw), "Invalid TIME_REF frequency %u\n", 363 clk_freq); 364 return -EINVAL; 365 } 366 367 if (clk_src >= NUM_ICE_CLK_SRC) { 368 dev_warn(ice_hw_to_dev(hw), "Invalid clock source %u\n", 369 clk_src); 370 return -EINVAL; 371 } 372 373 if (clk_src == ICE_CLK_SRC_TCXO && 374 clk_freq != ICE_TIME_REF_FREQ_25_000) { 375 dev_warn(ice_hw_to_dev(hw), 376 "TCXO only supports 25 MHz frequency\n"); 377 return -EINVAL; 378 } 379 380 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD9, &dw9.val); 381 if (err) 382 return err; 383 384 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD24, &dw24.val); 385 if (err) 386 return err; 387 388 err = ice_read_cgu_reg_e82x(hw, TSPLL_RO_BWM_LF, &bwm_lf.val); 389 if (err) 390 return err; 391 392 /* Log the current clock configuration */ 393 ice_debug(hw, ICE_DBG_PTP, "Current CGU configuration -- %s, clk_src %s, clk_freq %s, PLL %s\n", 394 dw24.ts_pll_enable ? "enabled" : "disabled", 395 ice_clk_src_str(dw24.time_ref_sel), 396 ice_clk_freq_str(dw9.time_ref_freq_sel), 397 bwm_lf.plllock_true_lock_cri ? "locked" : "unlocked"); 398 399 /* Disable the PLL before changing the clock source or frequency */ 400 if (dw24.ts_pll_enable) { 401 dw24.ts_pll_enable = 0; 402 403 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD24, dw24.val); 404 if (err) 405 return err; 406 } 407 408 /* Set the frequency */ 409 dw9.time_ref_freq_sel = clk_freq; 410 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD9, dw9.val); 411 if (err) 412 return err; 413 414 /* Configure the TS PLL feedback divisor */ 415 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD19, &dw19.val); 416 if (err) 417 return err; 418 419 dw19.tspll_fbdiv_intgr = e822_cgu_params[clk_freq].feedback_div; 420 dw19.tspll_ndivratio = 1; 421 422 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD19, dw19.val); 423 if (err) 424 return err; 425 426 /* Configure the TS PLL post divisor */ 427 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD22, &dw22.val); 428 if (err) 429 return err; 430 431 dw22.time1588clk_div = e822_cgu_params[clk_freq].post_pll_div; 432 dw22.time1588clk_sel_div2 = 0; 433 434 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD22, dw22.val); 435 if (err) 436 return err; 437 438 /* Configure the TS PLL pre divisor and clock source */ 439 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD24, &dw24.val); 440 if (err) 441 return err; 442 443 dw24.ref1588_ck_div = e822_cgu_params[clk_freq].refclk_pre_div; 444 dw24.tspll_fbdiv_frac = e822_cgu_params[clk_freq].frac_n_div; 445 dw24.time_ref_sel = clk_src; 446 447 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD24, dw24.val); 448 if (err) 449 return err; 450 451 /* Finally, enable the PLL */ 452 dw24.ts_pll_enable = 1; 453 454 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD24, dw24.val); 455 if (err) 456 return err; 457 458 /* Wait to verify if the PLL locks */ 459 usleep_range(1000, 5000); 460 461 err = ice_read_cgu_reg_e82x(hw, TSPLL_RO_BWM_LF, &bwm_lf.val); 462 if (err) 463 return err; 464 465 if (!bwm_lf.plllock_true_lock_cri) { 466 dev_warn(ice_hw_to_dev(hw), "CGU PLL failed to lock\n"); 467 return -EBUSY; 468 } 469 470 /* Log the current clock configuration */ 471 ice_debug(hw, ICE_DBG_PTP, "New CGU configuration -- %s, clk_src %s, clk_freq %s, PLL %s\n", 472 dw24.ts_pll_enable ? "enabled" : "disabled", 473 ice_clk_src_str(dw24.time_ref_sel), 474 ice_clk_freq_str(dw9.time_ref_freq_sel), 475 bwm_lf.plllock_true_lock_cri ? "locked" : "unlocked"); 476 477 return 0; 478 } 479 480 /** 481 * ice_cfg_cgu_pll_e825c - Configure the Clock Generation Unit for E825-C 482 * @hw: pointer to the HW struct 483 * @clk_freq: Clock frequency to program 484 * @clk_src: Clock source to select (TIME_REF, or TCXO) 485 * 486 * Configure the Clock Generation Unit with the desired clock frequency and 487 * time reference, enabling the PLL which drives the PTP hardware clock. 488 * 489 * Return: 490 * * %0 - success 491 * * %-EINVAL - input parameters are incorrect 492 * * %-EBUSY - failed to lock TS PLL 493 * * %other - CGU read/write failure 494 */ 495 static int ice_cfg_cgu_pll_e825c(struct ice_hw *hw, 496 enum ice_time_ref_freq clk_freq, 497 enum ice_clk_src clk_src) 498 { 499 union tspll_ro_lock_e825c ro_lock; 500 union nac_cgu_dword16_e825c dw16; 501 union nac_cgu_dword23_e825c dw23; 502 union nac_cgu_dword19 dw19; 503 union nac_cgu_dword22 dw22; 504 union nac_cgu_dword24 dw24; 505 union nac_cgu_dword9 dw9; 506 int err; 507 508 if (clk_freq >= NUM_ICE_TIME_REF_FREQ) { 509 dev_warn(ice_hw_to_dev(hw), "Invalid TIME_REF frequency %u\n", 510 clk_freq); 511 return -EINVAL; 512 } 513 514 if (clk_src >= NUM_ICE_CLK_SRC) { 515 dev_warn(ice_hw_to_dev(hw), "Invalid clock source %u\n", 516 clk_src); 517 return -EINVAL; 518 } 519 520 if (clk_src == ICE_CLK_SRC_TCXO && 521 clk_freq != ICE_TIME_REF_FREQ_156_250) { 522 dev_warn(ice_hw_to_dev(hw), 523 "TCXO only supports 156.25 MHz frequency\n"); 524 return -EINVAL; 525 } 526 527 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD9, &dw9.val); 528 if (err) 529 return err; 530 531 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD24, &dw24.val); 532 if (err) 533 return err; 534 535 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD16_E825C, &dw16.val); 536 if (err) 537 return err; 538 539 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD23_E825C, &dw23.val); 540 if (err) 541 return err; 542 543 err = ice_read_cgu_reg_e82x(hw, TSPLL_RO_LOCK_E825C, &ro_lock.val); 544 if (err) 545 return err; 546 547 /* Log the current clock configuration */ 548 ice_debug(hw, ICE_DBG_PTP, "Current CGU configuration -- %s, clk_src %s, clk_freq %s, PLL %s\n", 549 dw24.ts_pll_enable ? "enabled" : "disabled", 550 ice_clk_src_str(dw23.time_ref_sel), 551 ice_clk_freq_str(dw9.time_ref_freq_sel), 552 ro_lock.plllock_true_lock_cri ? "locked" : "unlocked"); 553 554 /* Disable the PLL before changing the clock source or frequency */ 555 if (dw23.ts_pll_enable) { 556 dw23.ts_pll_enable = 0; 557 558 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD23_E825C, 559 dw23.val); 560 if (err) 561 return err; 562 } 563 564 /* Set the frequency */ 565 dw9.time_ref_freq_sel = clk_freq; 566 567 /* Enable the correct receiver */ 568 if (clk_src == ICE_CLK_SRC_TCXO) { 569 dw9.time_ref_en = 0; 570 dw9.clk_eref0_en = 1; 571 } else { 572 dw9.time_ref_en = 1; 573 dw9.clk_eref0_en = 0; 574 } 575 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD9, dw9.val); 576 if (err) 577 return err; 578 579 /* Choose the referenced frequency */ 580 dw16.tspll_ck_refclkfreq = 581 e825c_cgu_params[clk_freq].tspll_ck_refclkfreq; 582 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD16_E825C, dw16.val); 583 if (err) 584 return err; 585 586 /* Configure the TS PLL feedback divisor */ 587 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD19, &dw19.val); 588 if (err) 589 return err; 590 591 dw19.tspll_fbdiv_intgr = 592 e825c_cgu_params[clk_freq].tspll_fbdiv_intgr; 593 dw19.tspll_ndivratio = 594 e825c_cgu_params[clk_freq].tspll_ndivratio; 595 596 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD19, dw19.val); 597 if (err) 598 return err; 599 600 /* Configure the TS PLL post divisor */ 601 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD22, &dw22.val); 602 if (err) 603 return err; 604 605 /* These two are constant for E825C */ 606 dw22.time1588clk_div = 5; 607 dw22.time1588clk_sel_div2 = 0; 608 609 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD22, dw22.val); 610 if (err) 611 return err; 612 613 /* Configure the TS PLL pre divisor and clock source */ 614 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD23_E825C, &dw23.val); 615 if (err) 616 return err; 617 618 dw23.ref1588_ck_div = 619 e825c_cgu_params[clk_freq].ref1588_ck_div; 620 dw23.time_ref_sel = clk_src; 621 622 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD23_E825C, dw23.val); 623 if (err) 624 return err; 625 626 dw24.tspll_fbdiv_frac = 627 e825c_cgu_params[clk_freq].tspll_fbdiv_frac; 628 629 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD24, dw24.val); 630 if (err) 631 return err; 632 633 /* Finally, enable the PLL */ 634 dw23.ts_pll_enable = 1; 635 636 err = ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD23_E825C, dw23.val); 637 if (err) 638 return err; 639 640 /* Wait to verify if the PLL locks */ 641 usleep_range(1000, 5000); 642 643 err = ice_read_cgu_reg_e82x(hw, TSPLL_RO_LOCK_E825C, &ro_lock.val); 644 if (err) 645 return err; 646 647 if (!ro_lock.plllock_true_lock_cri) { 648 dev_warn(ice_hw_to_dev(hw), "CGU PLL failed to lock\n"); 649 return -EBUSY; 650 } 651 652 /* Log the current clock configuration */ 653 ice_debug(hw, ICE_DBG_PTP, "New CGU configuration -- %s, clk_src %s, clk_freq %s, PLL %s\n", 654 dw24.ts_pll_enable ? "enabled" : "disabled", 655 ice_clk_src_str(dw23.time_ref_sel), 656 ice_clk_freq_str(dw9.time_ref_freq_sel), 657 ro_lock.plllock_true_lock_cri ? "locked" : "unlocked"); 658 659 return 0; 660 } 661 662 #define ICE_ONE_PPS_OUT_AMP_MAX 3 663 664 /** 665 * ice_cgu_cfg_pps_out - Configure 1PPS output from CGU 666 * @hw: pointer to the HW struct 667 * @enable: true to enable 1PPS output, false to disable it 668 * 669 * Return: 0 on success, other negative error code when CGU read/write failed 670 */ 671 int ice_cgu_cfg_pps_out(struct ice_hw *hw, bool enable) 672 { 673 union nac_cgu_dword9 dw9; 674 int err; 675 676 err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD9, &dw9.val); 677 if (err) 678 return err; 679 680 dw9.one_pps_out_en = enable; 681 dw9.one_pps_out_amp = enable * ICE_ONE_PPS_OUT_AMP_MAX; 682 return ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD9, dw9.val); 683 } 684 685 /** 686 * ice_cfg_cgu_pll_dis_sticky_bits_e82x - disable TS PLL sticky bits 687 * @hw: pointer to the HW struct 688 * 689 * Configure the Clock Generation Unit TS PLL sticky bits so they don't latch on 690 * losing TS PLL lock, but always show current state. 691 * 692 * Return: 0 on success, other error codes when failed to read/write CGU 693 */ 694 static int ice_cfg_cgu_pll_dis_sticky_bits_e82x(struct ice_hw *hw) 695 { 696 union tspll_cntr_bist_settings cntr_bist; 697 int err; 698 699 err = ice_read_cgu_reg_e82x(hw, TSPLL_CNTR_BIST_SETTINGS, 700 &cntr_bist.val); 701 if (err) 702 return err; 703 704 /* Disable sticky lock detection so lock err reported is accurate */ 705 cntr_bist.i_plllock_sel_0 = 0; 706 cntr_bist.i_plllock_sel_1 = 0; 707 708 return ice_write_cgu_reg_e82x(hw, TSPLL_CNTR_BIST_SETTINGS, 709 cntr_bist.val); 710 } 711 712 /** 713 * ice_cfg_cgu_pll_dis_sticky_bits_e825c - disable TS PLL sticky bits for E825-C 714 * @hw: pointer to the HW struct 715 * 716 * Configure the Clock Generation Unit TS PLL sticky bits so they don't latch on 717 * losing TS PLL lock, but always show current state. 718 * 719 * Return: 0 on success, other error codes when failed to read/write CGU 720 */ 721 static int ice_cfg_cgu_pll_dis_sticky_bits_e825c(struct ice_hw *hw) 722 { 723 union tspll_bw_tdc_e825c bw_tdc; 724 int err; 725 726 err = ice_read_cgu_reg_e82x(hw, TSPLL_BW_TDC_E825C, &bw_tdc.val); 727 if (err) 728 return err; 729 730 bw_tdc.i_plllock_sel_1_0 = 0; 731 732 return ice_write_cgu_reg_e82x(hw, TSPLL_BW_TDC_E825C, bw_tdc.val); 733 } 734 735 /** 736 * ice_init_cgu_e82x - Initialize CGU with settings from firmware 737 * @hw: pointer to the HW structure 738 * 739 * Initialize the Clock Generation Unit of the E822 device. 740 * 741 * Return: 0 on success, other error codes when failed to read/write/cfg CGU 742 */ 743 static int ice_init_cgu_e82x(struct ice_hw *hw) 744 { 745 struct ice_ts_func_info *ts_info = &hw->func_caps.ts_func_info; 746 int err; 747 748 /* Disable sticky lock detection so lock err reported is accurate */ 749 if (ice_is_e825c(hw)) 750 err = ice_cfg_cgu_pll_dis_sticky_bits_e825c(hw); 751 else 752 err = ice_cfg_cgu_pll_dis_sticky_bits_e82x(hw); 753 if (err) 754 return err; 755 756 /* Configure the CGU PLL using the parameters from the function 757 * capabilities. 758 */ 759 if (ice_is_e825c(hw)) 760 err = ice_cfg_cgu_pll_e825c(hw, ts_info->time_ref, 761 (enum ice_clk_src)ts_info->clk_src); 762 else 763 err = ice_cfg_cgu_pll_e82x(hw, ts_info->time_ref, 764 (enum ice_clk_src)ts_info->clk_src); 765 766 return err; 767 } 768 769 /** 770 * ice_ptp_tmr_cmd_to_src_reg - Convert to source timer command value 771 * @hw: pointer to HW struct 772 * @cmd: Timer command 773 * 774 * Return: the source timer command register value for the given PTP timer 775 * command. 776 */ 777 static u32 ice_ptp_tmr_cmd_to_src_reg(struct ice_hw *hw, 778 enum ice_ptp_tmr_cmd cmd) 779 { 780 u32 cmd_val, tmr_idx; 781 782 switch (cmd) { 783 case ICE_PTP_INIT_TIME: 784 cmd_val = GLTSYN_CMD_INIT_TIME; 785 break; 786 case ICE_PTP_INIT_INCVAL: 787 cmd_val = GLTSYN_CMD_INIT_INCVAL; 788 break; 789 case ICE_PTP_ADJ_TIME: 790 cmd_val = GLTSYN_CMD_ADJ_TIME; 791 break; 792 case ICE_PTP_ADJ_TIME_AT_TIME: 793 cmd_val = GLTSYN_CMD_ADJ_INIT_TIME; 794 break; 795 case ICE_PTP_NOP: 796 case ICE_PTP_READ_TIME: 797 cmd_val = GLTSYN_CMD_READ_TIME; 798 break; 799 default: 800 dev_warn(ice_hw_to_dev(hw), 801 "Ignoring unrecognized timer command %u\n", cmd); 802 cmd_val = 0; 803 } 804 805 tmr_idx = ice_get_ptp_src_clock_index(hw); 806 807 return tmr_idx << SEL_CPK_SRC | cmd_val; 808 } 809 810 /** 811 * ice_ptp_tmr_cmd_to_port_reg- Convert to port timer command value 812 * @hw: pointer to HW struct 813 * @cmd: Timer command 814 * 815 * Note that some hardware families use a different command register value for 816 * the PHY ports, while other hardware families use the same register values 817 * as the source timer. 818 * 819 * Return: the PHY port timer command register value for the given PTP timer 820 * command. 821 */ 822 static u32 ice_ptp_tmr_cmd_to_port_reg(struct ice_hw *hw, 823 enum ice_ptp_tmr_cmd cmd) 824 { 825 u32 cmd_val, tmr_idx; 826 827 /* Certain hardware families share the same register values for the 828 * port register and source timer register. 829 */ 830 switch (ice_get_phy_model(hw)) { 831 case ICE_PHY_E810: 832 return ice_ptp_tmr_cmd_to_src_reg(hw, cmd) & TS_CMD_MASK_E810; 833 default: 834 break; 835 } 836 837 switch (cmd) { 838 case ICE_PTP_INIT_TIME: 839 cmd_val = PHY_CMD_INIT_TIME; 840 break; 841 case ICE_PTP_INIT_INCVAL: 842 cmd_val = PHY_CMD_INIT_INCVAL; 843 break; 844 case ICE_PTP_ADJ_TIME: 845 cmd_val = PHY_CMD_ADJ_TIME; 846 break; 847 case ICE_PTP_ADJ_TIME_AT_TIME: 848 cmd_val = PHY_CMD_ADJ_TIME_AT_TIME; 849 break; 850 case ICE_PTP_READ_TIME: 851 cmd_val = PHY_CMD_READ_TIME; 852 break; 853 case ICE_PTP_NOP: 854 cmd_val = 0; 855 break; 856 default: 857 dev_warn(ice_hw_to_dev(hw), 858 "Ignoring unrecognized timer command %u\n", cmd); 859 cmd_val = 0; 860 } 861 862 tmr_idx = ice_get_ptp_src_clock_index(hw); 863 864 return tmr_idx << SEL_PHY_SRC | cmd_val; 865 } 866 867 /** 868 * ice_ptp_src_cmd - Prepare source timer for a timer command 869 * @hw: pointer to HW structure 870 * @cmd: Timer command 871 * 872 * Prepare the source timer for an upcoming timer sync command. 873 */ 874 void ice_ptp_src_cmd(struct ice_hw *hw, enum ice_ptp_tmr_cmd cmd) 875 { 876 u32 cmd_val = ice_ptp_tmr_cmd_to_src_reg(hw, cmd); 877 878 wr32(hw, GLTSYN_CMD, cmd_val); 879 } 880 881 /** 882 * ice_ptp_exec_tmr_cmd - Execute all prepared timer commands 883 * @hw: pointer to HW struct 884 * 885 * Write the SYNC_EXEC_CMD bit to the GLTSYN_CMD_SYNC register, and flush the 886 * write immediately. This triggers the hardware to begin executing all of the 887 * source and PHY timer commands synchronously. 888 */ 889 static void ice_ptp_exec_tmr_cmd(struct ice_hw *hw) 890 { 891 struct ice_pf *pf = container_of(hw, struct ice_pf, hw); 892 893 guard(spinlock)(&pf->adapter->ptp_gltsyn_time_lock); 894 wr32(hw, GLTSYN_CMD_SYNC, SYNC_EXEC_CMD); 895 ice_flush(hw); 896 } 897 898 /* 56G PHY device functions 899 * 900 * The following functions operate on devices with the ETH 56G PHY. 901 */ 902 903 /** 904 * ice_write_phy_eth56g - Write a PHY port register 905 * @hw: pointer to the HW struct 906 * @phy_idx: PHY index 907 * @addr: PHY register address 908 * @val: Value to write 909 * 910 * Return: 0 on success, other error codes when failed to write to PHY 911 */ 912 static int ice_write_phy_eth56g(struct ice_hw *hw, u8 phy_idx, u32 addr, 913 u32 val) 914 { 915 struct ice_sbq_msg_input phy_msg; 916 int err; 917 918 phy_msg.opcode = ice_sbq_msg_wr; 919 920 phy_msg.msg_addr_low = lower_16_bits(addr); 921 phy_msg.msg_addr_high = upper_16_bits(addr); 922 923 phy_msg.data = val; 924 phy_msg.dest_dev = hw->ptp.phy.eth56g.phy_addr[phy_idx]; 925 926 err = ice_sbq_rw_reg(hw, &phy_msg, ICE_AQ_FLAG_RD); 927 928 if (err) 929 ice_debug(hw, ICE_DBG_PTP, "PTP failed to send msg to phy %d\n", 930 err); 931 932 return err; 933 } 934 935 /** 936 * ice_read_phy_eth56g - Read a PHY port register 937 * @hw: pointer to the HW struct 938 * @phy_idx: PHY index 939 * @addr: PHY register address 940 * @val: Value to write 941 * 942 * Return: 0 on success, other error codes when failed to read from PHY 943 */ 944 static int ice_read_phy_eth56g(struct ice_hw *hw, u8 phy_idx, u32 addr, 945 u32 *val) 946 { 947 struct ice_sbq_msg_input phy_msg; 948 int err; 949 950 phy_msg.opcode = ice_sbq_msg_rd; 951 952 phy_msg.msg_addr_low = lower_16_bits(addr); 953 phy_msg.msg_addr_high = upper_16_bits(addr); 954 955 phy_msg.data = 0; 956 phy_msg.dest_dev = hw->ptp.phy.eth56g.phy_addr[phy_idx]; 957 958 err = ice_sbq_rw_reg(hw, &phy_msg, ICE_AQ_FLAG_RD); 959 if (err) { 960 ice_debug(hw, ICE_DBG_PTP, "PTP failed to send msg to phy %d\n", 961 err); 962 return err; 963 } 964 965 *val = phy_msg.data; 966 967 return 0; 968 } 969 970 /** 971 * ice_phy_res_address_eth56g - Calculate a PHY port register address 972 * @port: Port number to be written 973 * @res_type: resource type (register/memory) 974 * @offset: Offset from PHY port register base 975 * @addr: The result address 976 * 977 * Return: 978 * * %0 - success 979 * * %EINVAL - invalid port number or resource type 980 */ 981 static int ice_phy_res_address_eth56g(u8 port, enum eth56g_res_type res_type, 982 u32 offset, u32 *addr) 983 { 984 u8 lane = port % ICE_PORTS_PER_QUAD; 985 u8 phy = ICE_GET_QUAD_NUM(port); 986 987 if (res_type >= NUM_ETH56G_PHY_RES) 988 return -EINVAL; 989 990 *addr = eth56g_phy_res[res_type].base[phy] + 991 lane * eth56g_phy_res[res_type].step + offset; 992 return 0; 993 } 994 995 /** 996 * ice_write_port_eth56g - Write a PHY port register 997 * @hw: pointer to the HW struct 998 * @offset: PHY register offset 999 * @port: Port number 1000 * @val: Value to write 1001 * @res_type: resource type (register/memory) 1002 * 1003 * Return: 1004 * * %0 - success 1005 * * %EINVAL - invalid port number or resource type 1006 * * %other - failed to write to PHY 1007 */ 1008 static int ice_write_port_eth56g(struct ice_hw *hw, u8 port, u32 offset, 1009 u32 val, enum eth56g_res_type res_type) 1010 { 1011 u8 phy_port = port % hw->ptp.ports_per_phy; 1012 u8 phy_idx = port / hw->ptp.ports_per_phy; 1013 u32 addr; 1014 int err; 1015 1016 if (port >= hw->ptp.num_lports) 1017 return -EINVAL; 1018 1019 err = ice_phy_res_address_eth56g(phy_port, res_type, offset, &addr); 1020 if (err) 1021 return err; 1022 1023 return ice_write_phy_eth56g(hw, phy_idx, addr, val); 1024 } 1025 1026 /** 1027 * ice_read_port_eth56g - Read a PHY port register 1028 * @hw: pointer to the HW struct 1029 * @offset: PHY register offset 1030 * @port: Port number 1031 * @val: Value to write 1032 * @res_type: resource type (register/memory) 1033 * 1034 * Return: 1035 * * %0 - success 1036 * * %EINVAL - invalid port number or resource type 1037 * * %other - failed to read from PHY 1038 */ 1039 static int ice_read_port_eth56g(struct ice_hw *hw, u8 port, u32 offset, 1040 u32 *val, enum eth56g_res_type res_type) 1041 { 1042 u8 phy_port = port % hw->ptp.ports_per_phy; 1043 u8 phy_idx = port / hw->ptp.ports_per_phy; 1044 u32 addr; 1045 int err; 1046 1047 if (port >= hw->ptp.num_lports) 1048 return -EINVAL; 1049 1050 err = ice_phy_res_address_eth56g(phy_port, res_type, offset, &addr); 1051 if (err) 1052 return err; 1053 1054 return ice_read_phy_eth56g(hw, phy_idx, addr, val); 1055 } 1056 1057 /** 1058 * ice_write_ptp_reg_eth56g - Write a PHY port register 1059 * @hw: pointer to the HW struct 1060 * @port: Port number to be written 1061 * @offset: Offset from PHY port register base 1062 * @val: Value to write 1063 * 1064 * Return: 1065 * * %0 - success 1066 * * %EINVAL - invalid port number or resource type 1067 * * %other - failed to write to PHY 1068 */ 1069 static int ice_write_ptp_reg_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1070 u32 val) 1071 { 1072 return ice_write_port_eth56g(hw, port, offset, val, ETH56G_PHY_REG_PTP); 1073 } 1074 1075 /** 1076 * ice_write_mac_reg_eth56g - Write a MAC PHY port register 1077 * parameter 1078 * @hw: pointer to the HW struct 1079 * @port: Port number to be written 1080 * @offset: Offset from PHY port register base 1081 * @val: Value to write 1082 * 1083 * Return: 1084 * * %0 - success 1085 * * %EINVAL - invalid port number or resource type 1086 * * %other - failed to write to PHY 1087 */ 1088 static int ice_write_mac_reg_eth56g(struct ice_hw *hw, u8 port, u32 offset, 1089 u32 val) 1090 { 1091 return ice_write_port_eth56g(hw, port, offset, val, ETH56G_PHY_REG_MAC); 1092 } 1093 1094 /** 1095 * ice_write_xpcs_reg_eth56g - Write a PHY port register 1096 * @hw: pointer to the HW struct 1097 * @port: Port number to be written 1098 * @offset: Offset from PHY port register base 1099 * @val: Value to write 1100 * 1101 * Return: 1102 * * %0 - success 1103 * * %EINVAL - invalid port number or resource type 1104 * * %other - failed to write to PHY 1105 */ 1106 static int ice_write_xpcs_reg_eth56g(struct ice_hw *hw, u8 port, u32 offset, 1107 u32 val) 1108 { 1109 return ice_write_port_eth56g(hw, port, offset, val, 1110 ETH56G_PHY_REG_XPCS); 1111 } 1112 1113 /** 1114 * ice_read_ptp_reg_eth56g - Read a PHY port register 1115 * @hw: pointer to the HW struct 1116 * @port: Port number to be read 1117 * @offset: Offset from PHY port register base 1118 * @val: Pointer to the value to read (out param) 1119 * 1120 * Return: 1121 * * %0 - success 1122 * * %EINVAL - invalid port number or resource type 1123 * * %other - failed to read from PHY 1124 */ 1125 static int ice_read_ptp_reg_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1126 u32 *val) 1127 { 1128 return ice_read_port_eth56g(hw, port, offset, val, ETH56G_PHY_REG_PTP); 1129 } 1130 1131 /** 1132 * ice_read_mac_reg_eth56g - Read a PHY port register 1133 * @hw: pointer to the HW struct 1134 * @port: Port number to be read 1135 * @offset: Offset from PHY port register base 1136 * @val: Pointer to the value to read (out param) 1137 * 1138 * Return: 1139 * * %0 - success 1140 * * %EINVAL - invalid port number or resource type 1141 * * %other - failed to read from PHY 1142 */ 1143 static int ice_read_mac_reg_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1144 u32 *val) 1145 { 1146 return ice_read_port_eth56g(hw, port, offset, val, ETH56G_PHY_REG_MAC); 1147 } 1148 1149 /** 1150 * ice_read_gpcs_reg_eth56g - Read a PHY port register 1151 * @hw: pointer to the HW struct 1152 * @port: Port number to be read 1153 * @offset: Offset from PHY port register base 1154 * @val: Pointer to the value to read (out param) 1155 * 1156 * Return: 1157 * * %0 - success 1158 * * %EINVAL - invalid port number or resource type 1159 * * %other - failed to read from PHY 1160 */ 1161 static int ice_read_gpcs_reg_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1162 u32 *val) 1163 { 1164 return ice_read_port_eth56g(hw, port, offset, val, ETH56G_PHY_REG_GPCS); 1165 } 1166 1167 /** 1168 * ice_read_port_mem_eth56g - Read a PHY port memory location 1169 * @hw: pointer to the HW struct 1170 * @port: Port number to be read 1171 * @offset: Offset from PHY port register base 1172 * @val: Pointer to the value to read (out param) 1173 * 1174 * Return: 1175 * * %0 - success 1176 * * %EINVAL - invalid port number or resource type 1177 * * %other - failed to read from PHY 1178 */ 1179 static int ice_read_port_mem_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1180 u32 *val) 1181 { 1182 return ice_read_port_eth56g(hw, port, offset, val, ETH56G_PHY_MEM_PTP); 1183 } 1184 1185 /** 1186 * ice_write_port_mem_eth56g - Write a PHY port memory location 1187 * @hw: pointer to the HW struct 1188 * @port: Port number to be read 1189 * @offset: Offset from PHY port register base 1190 * @val: Pointer to the value to read (out param) 1191 * 1192 * Return: 1193 * * %0 - success 1194 * * %EINVAL - invalid port number or resource type 1195 * * %other - failed to write to PHY 1196 */ 1197 static int ice_write_port_mem_eth56g(struct ice_hw *hw, u8 port, u16 offset, 1198 u32 val) 1199 { 1200 return ice_write_port_eth56g(hw, port, offset, val, ETH56G_PHY_MEM_PTP); 1201 } 1202 1203 /** 1204 * ice_is_64b_phy_reg_eth56g - Check if this is a 64bit PHY register 1205 * @low_addr: the low address to check 1206 * @high_addr: on return, contains the high address of the 64bit register 1207 * 1208 * Write the appropriate high register offset to use. 1209 * 1210 * Return: true if the provided low address is one of the known 64bit PHY values 1211 * represented as two 32bit registers, false otherwise. 1212 */ 1213 static bool ice_is_64b_phy_reg_eth56g(u16 low_addr, u16 *high_addr) 1214 { 1215 switch (low_addr) { 1216 case PHY_REG_TX_TIMER_INC_PRE_L: 1217 *high_addr = PHY_REG_TX_TIMER_INC_PRE_U; 1218 return true; 1219 case PHY_REG_RX_TIMER_INC_PRE_L: 1220 *high_addr = PHY_REG_RX_TIMER_INC_PRE_U; 1221 return true; 1222 case PHY_REG_TX_CAPTURE_L: 1223 *high_addr = PHY_REG_TX_CAPTURE_U; 1224 return true; 1225 case PHY_REG_RX_CAPTURE_L: 1226 *high_addr = PHY_REG_RX_CAPTURE_U; 1227 return true; 1228 case PHY_REG_TOTAL_TX_OFFSET_L: 1229 *high_addr = PHY_REG_TOTAL_TX_OFFSET_U; 1230 return true; 1231 case PHY_REG_TOTAL_RX_OFFSET_L: 1232 *high_addr = PHY_REG_TOTAL_RX_OFFSET_U; 1233 return true; 1234 case PHY_REG_TX_MEMORY_STATUS_L: 1235 *high_addr = PHY_REG_TX_MEMORY_STATUS_U; 1236 return true; 1237 default: 1238 return false; 1239 } 1240 } 1241 1242 /** 1243 * ice_is_40b_phy_reg_eth56g - Check if this is a 40bit PHY register 1244 * @low_addr: the low address to check 1245 * @high_addr: on return, contains the high address of the 40bit value 1246 * 1247 * Write the appropriate high register offset to use. 1248 * 1249 * Return: true if the provided low address is one of the known 40bit PHY 1250 * values split into two registers with the lower 8 bits in the low register and 1251 * the upper 32 bits in the high register, false otherwise. 1252 */ 1253 static bool ice_is_40b_phy_reg_eth56g(u16 low_addr, u16 *high_addr) 1254 { 1255 switch (low_addr) { 1256 case PHY_REG_TIMETUS_L: 1257 *high_addr = PHY_REG_TIMETUS_U; 1258 return true; 1259 case PHY_PCS_REF_TUS_L: 1260 *high_addr = PHY_PCS_REF_TUS_U; 1261 return true; 1262 case PHY_PCS_REF_INC_L: 1263 *high_addr = PHY_PCS_REF_INC_U; 1264 return true; 1265 default: 1266 return false; 1267 } 1268 } 1269 1270 /** 1271 * ice_read_64b_phy_reg_eth56g - Read a 64bit value from PHY registers 1272 * @hw: pointer to the HW struct 1273 * @port: PHY port to read from 1274 * @low_addr: offset of the lower register to read from 1275 * @val: on return, the contents of the 64bit value from the PHY registers 1276 * @res_type: resource type 1277 * 1278 * Check if the caller has specified a known 40 bit register offset and read 1279 * the two registers associated with a 40bit value and return it in the val 1280 * pointer. 1281 * 1282 * Return: 1283 * * %0 - success 1284 * * %EINVAL - not a 64 bit register 1285 * * %other - failed to read from PHY 1286 */ 1287 static int ice_read_64b_phy_reg_eth56g(struct ice_hw *hw, u8 port, u16 low_addr, 1288 u64 *val, enum eth56g_res_type res_type) 1289 { 1290 u16 high_addr; 1291 u32 lo, hi; 1292 int err; 1293 1294 if (!ice_is_64b_phy_reg_eth56g(low_addr, &high_addr)) 1295 return -EINVAL; 1296 1297 err = ice_read_port_eth56g(hw, port, low_addr, &lo, res_type); 1298 if (err) { 1299 ice_debug(hw, ICE_DBG_PTP, "Failed to read from low register %#08x\n, err %d", 1300 low_addr, err); 1301 return err; 1302 } 1303 1304 err = ice_read_port_eth56g(hw, port, high_addr, &hi, res_type); 1305 if (err) { 1306 ice_debug(hw, ICE_DBG_PTP, "Failed to read from high register %#08x\n, err %d", 1307 high_addr, err); 1308 return err; 1309 } 1310 1311 *val = ((u64)hi << 32) | lo; 1312 1313 return 0; 1314 } 1315 1316 /** 1317 * ice_read_64b_ptp_reg_eth56g - Read a 64bit value from PHY registers 1318 * @hw: pointer to the HW struct 1319 * @port: PHY port to read from 1320 * @low_addr: offset of the lower register to read from 1321 * @val: on return, the contents of the 64bit value from the PHY registers 1322 * 1323 * Check if the caller has specified a known 40 bit register offset and read 1324 * the two registers associated with a 40bit value and return it in the val 1325 * pointer. 1326 * 1327 * Return: 1328 * * %0 - success 1329 * * %EINVAL - not a 64 bit register 1330 * * %other - failed to read from PHY 1331 */ 1332 static int ice_read_64b_ptp_reg_eth56g(struct ice_hw *hw, u8 port, u16 low_addr, 1333 u64 *val) 1334 { 1335 return ice_read_64b_phy_reg_eth56g(hw, port, low_addr, val, 1336 ETH56G_PHY_REG_PTP); 1337 } 1338 1339 /** 1340 * ice_write_40b_phy_reg_eth56g - Write a 40b value to the PHY 1341 * @hw: pointer to the HW struct 1342 * @port: port to write to 1343 * @low_addr: offset of the low register 1344 * @val: 40b value to write 1345 * @res_type: resource type 1346 * 1347 * Check if the caller has specified a known 40 bit register offset and write 1348 * provided 40b value to the two associated registers by splitting it up into 1349 * two chunks, the lower 8 bits and the upper 32 bits. 1350 * 1351 * Return: 1352 * * %0 - success 1353 * * %EINVAL - not a 40 bit register 1354 * * %other - failed to write to PHY 1355 */ 1356 static int ice_write_40b_phy_reg_eth56g(struct ice_hw *hw, u8 port, 1357 u16 low_addr, u64 val, 1358 enum eth56g_res_type res_type) 1359 { 1360 u16 high_addr; 1361 u32 lo, hi; 1362 int err; 1363 1364 if (!ice_is_40b_phy_reg_eth56g(low_addr, &high_addr)) 1365 return -EINVAL; 1366 1367 lo = FIELD_GET(P_REG_40B_LOW_M, val); 1368 hi = (u32)(val >> P_REG_40B_HIGH_S); 1369 1370 err = ice_write_port_eth56g(hw, port, low_addr, lo, res_type); 1371 if (err) { 1372 ice_debug(hw, ICE_DBG_PTP, "Failed to write to low register 0x%08x\n, err %d", 1373 low_addr, err); 1374 return err; 1375 } 1376 1377 err = ice_write_port_eth56g(hw, port, high_addr, hi, res_type); 1378 if (err) { 1379 ice_debug(hw, ICE_DBG_PTP, "Failed to write to high register 0x%08x\n, err %d", 1380 high_addr, err); 1381 return err; 1382 } 1383 1384 return 0; 1385 } 1386 1387 /** 1388 * ice_write_40b_ptp_reg_eth56g - Write a 40b value to the PHY 1389 * @hw: pointer to the HW struct 1390 * @port: port to write to 1391 * @low_addr: offset of the low register 1392 * @val: 40b value to write 1393 * 1394 * Check if the caller has specified a known 40 bit register offset and write 1395 * provided 40b value to the two associated registers by splitting it up into 1396 * two chunks, the lower 8 bits and the upper 32 bits. 1397 * 1398 * Return: 1399 * * %0 - success 1400 * * %EINVAL - not a 40 bit register 1401 * * %other - failed to write to PHY 1402 */ 1403 static int ice_write_40b_ptp_reg_eth56g(struct ice_hw *hw, u8 port, 1404 u16 low_addr, u64 val) 1405 { 1406 return ice_write_40b_phy_reg_eth56g(hw, port, low_addr, val, 1407 ETH56G_PHY_REG_PTP); 1408 } 1409 1410 /** 1411 * ice_write_64b_phy_reg_eth56g - Write a 64bit value to PHY registers 1412 * @hw: pointer to the HW struct 1413 * @port: PHY port to read from 1414 * @low_addr: offset of the lower register to read from 1415 * @val: the contents of the 64bit value to write to PHY 1416 * @res_type: resource type 1417 * 1418 * Check if the caller has specified a known 64 bit register offset and write 1419 * the 64bit value to the two associated 32bit PHY registers. 1420 * 1421 * Return: 1422 * * %0 - success 1423 * * %EINVAL - not a 64 bit register 1424 * * %other - failed to write to PHY 1425 */ 1426 static int ice_write_64b_phy_reg_eth56g(struct ice_hw *hw, u8 port, 1427 u16 low_addr, u64 val, 1428 enum eth56g_res_type res_type) 1429 { 1430 u16 high_addr; 1431 u32 lo, hi; 1432 int err; 1433 1434 if (!ice_is_64b_phy_reg_eth56g(low_addr, &high_addr)) 1435 return -EINVAL; 1436 1437 lo = lower_32_bits(val); 1438 hi = upper_32_bits(val); 1439 1440 err = ice_write_port_eth56g(hw, port, low_addr, lo, res_type); 1441 if (err) { 1442 ice_debug(hw, ICE_DBG_PTP, "Failed to write to low register 0x%08x\n, err %d", 1443 low_addr, err); 1444 return err; 1445 } 1446 1447 err = ice_write_port_eth56g(hw, port, high_addr, hi, res_type); 1448 if (err) { 1449 ice_debug(hw, ICE_DBG_PTP, "Failed to write to high register 0x%08x\n, err %d", 1450 high_addr, err); 1451 return err; 1452 } 1453 1454 return 0; 1455 } 1456 1457 /** 1458 * ice_write_64b_ptp_reg_eth56g - Write a 64bit value to PHY registers 1459 * @hw: pointer to the HW struct 1460 * @port: PHY port to read from 1461 * @low_addr: offset of the lower register to read from 1462 * @val: the contents of the 64bit value to write to PHY 1463 * 1464 * Check if the caller has specified a known 64 bit register offset and write 1465 * the 64bit value to the two associated 32bit PHY registers. 1466 * 1467 * Return: 1468 * * %0 - success 1469 * * %EINVAL - not a 64 bit register 1470 * * %other - failed to write to PHY 1471 */ 1472 static int ice_write_64b_ptp_reg_eth56g(struct ice_hw *hw, u8 port, 1473 u16 low_addr, u64 val) 1474 { 1475 return ice_write_64b_phy_reg_eth56g(hw, port, low_addr, val, 1476 ETH56G_PHY_REG_PTP); 1477 } 1478 1479 /** 1480 * ice_read_ptp_tstamp_eth56g - Read a PHY timestamp out of the port memory 1481 * @hw: pointer to the HW struct 1482 * @port: the port to read from 1483 * @idx: the timestamp index to read 1484 * @tstamp: on return, the 40bit timestamp value 1485 * 1486 * Read a 40bit timestamp value out of the two associated entries in the 1487 * port memory block of the internal PHYs of the 56G devices. 1488 * 1489 * Return: 1490 * * %0 - success 1491 * * %other - failed to read from PHY 1492 */ 1493 static int ice_read_ptp_tstamp_eth56g(struct ice_hw *hw, u8 port, u8 idx, 1494 u64 *tstamp) 1495 { 1496 u16 lo_addr, hi_addr; 1497 u32 lo, hi; 1498 int err; 1499 1500 lo_addr = (u16)PHY_TSTAMP_L(idx); 1501 hi_addr = (u16)PHY_TSTAMP_U(idx); 1502 1503 err = ice_read_port_mem_eth56g(hw, port, lo_addr, &lo); 1504 if (err) { 1505 ice_debug(hw, ICE_DBG_PTP, "Failed to read low PTP timestamp register, err %d\n", 1506 err); 1507 return err; 1508 } 1509 1510 err = ice_read_port_mem_eth56g(hw, port, hi_addr, &hi); 1511 if (err) { 1512 ice_debug(hw, ICE_DBG_PTP, "Failed to read high PTP timestamp register, err %d\n", 1513 err); 1514 return err; 1515 } 1516 1517 /* For 56G based internal PHYs, the timestamp is reported with the 1518 * lower 8 bits in the low register, and the upper 32 bits in the high 1519 * register. 1520 */ 1521 *tstamp = FIELD_PREP(TS_PHY_HIGH_M, hi) | 1522 FIELD_PREP(TS_PHY_LOW_M, lo); 1523 1524 return 0; 1525 } 1526 1527 /** 1528 * ice_clear_ptp_tstamp_eth56g - Clear a timestamp from the quad block 1529 * @hw: pointer to the HW struct 1530 * @port: the quad to read from 1531 * @idx: the timestamp index to reset 1532 * 1533 * Read and then forcibly clear the timestamp index to ensure the valid bit is 1534 * cleared and the timestamp status bit is reset in the PHY port memory of 1535 * internal PHYs of the 56G devices. 1536 * 1537 * To directly clear the contents of the timestamp block entirely, discarding 1538 * all timestamp data at once, software should instead use 1539 * ice_ptp_reset_ts_memory_quad_eth56g(). 1540 * 1541 * This function should only be called on an idx whose bit is set according to 1542 * ice_get_phy_tx_tstamp_ready(). 1543 * 1544 * Return: 1545 * * %0 - success 1546 * * %other - failed to write to PHY 1547 */ 1548 static int ice_clear_ptp_tstamp_eth56g(struct ice_hw *hw, u8 port, u8 idx) 1549 { 1550 u64 unused_tstamp; 1551 u16 lo_addr; 1552 int err; 1553 1554 /* Read the timestamp register to ensure the timestamp status bit is 1555 * cleared. 1556 */ 1557 err = ice_read_ptp_tstamp_eth56g(hw, port, idx, &unused_tstamp); 1558 if (err) { 1559 ice_debug(hw, ICE_DBG_PTP, "Failed to read the PHY timestamp register for port %u, idx %u, err %d\n", 1560 port, idx, err); 1561 } 1562 1563 lo_addr = (u16)PHY_TSTAMP_L(idx); 1564 1565 err = ice_write_port_mem_eth56g(hw, port, lo_addr, 0); 1566 if (err) { 1567 ice_debug(hw, ICE_DBG_PTP, "Failed to clear low PTP timestamp register for port %u, idx %u, err %d\n", 1568 port, idx, err); 1569 return err; 1570 } 1571 1572 return 0; 1573 } 1574 1575 /** 1576 * ice_ptp_reset_ts_memory_eth56g - Clear all timestamps from the port block 1577 * @hw: pointer to the HW struct 1578 */ 1579 static void ice_ptp_reset_ts_memory_eth56g(struct ice_hw *hw) 1580 { 1581 unsigned int port; 1582 1583 for (port = 0; port < hw->ptp.num_lports; port++) { 1584 ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_MEMORY_STATUS_L, 1585 0); 1586 ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_MEMORY_STATUS_U, 1587 0); 1588 } 1589 } 1590 1591 /** 1592 * ice_ptp_prep_port_time_eth56g - Prepare one PHY port with initial time 1593 * @hw: pointer to the HW struct 1594 * @port: port number 1595 * @time: time to initialize the PHY port clocks to 1596 * 1597 * Write a new initial time value into registers of a specific PHY port. 1598 * 1599 * Return: 1600 * * %0 - success 1601 * * %other - failed to write to PHY 1602 */ 1603 static int ice_ptp_prep_port_time_eth56g(struct ice_hw *hw, u8 port, 1604 u64 time) 1605 { 1606 int err; 1607 1608 /* Tx case */ 1609 err = ice_write_64b_ptp_reg_eth56g(hw, port, PHY_REG_TX_TIMER_INC_PRE_L, 1610 time); 1611 if (err) 1612 return err; 1613 1614 /* Rx case */ 1615 return ice_write_64b_ptp_reg_eth56g(hw, port, 1616 PHY_REG_RX_TIMER_INC_PRE_L, time); 1617 } 1618 1619 /** 1620 * ice_ptp_prep_phy_time_eth56g - Prepare PHY port with initial time 1621 * @hw: pointer to the HW struct 1622 * @time: Time to initialize the PHY port clocks to 1623 * 1624 * Program the PHY port registers with a new initial time value. The port 1625 * clock will be initialized once the driver issues an ICE_PTP_INIT_TIME sync 1626 * command. The time value is the upper 32 bits of the PHY timer, usually in 1627 * units of nominal nanoseconds. 1628 * 1629 * Return: 1630 * * %0 - success 1631 * * %other - failed to write to PHY 1632 */ 1633 static int ice_ptp_prep_phy_time_eth56g(struct ice_hw *hw, u32 time) 1634 { 1635 u64 phy_time; 1636 u8 port; 1637 1638 /* The time represents the upper 32 bits of the PHY timer, so we need 1639 * to shift to account for this when programming. 1640 */ 1641 phy_time = (u64)time << 32; 1642 1643 for (port = 0; port < hw->ptp.num_lports; port++) { 1644 int err; 1645 1646 err = ice_ptp_prep_port_time_eth56g(hw, port, phy_time); 1647 if (err) { 1648 ice_debug(hw, ICE_DBG_PTP, "Failed to write init time for port %u, err %d\n", 1649 port, err); 1650 return err; 1651 } 1652 } 1653 1654 return 0; 1655 } 1656 1657 /** 1658 * ice_ptp_prep_port_adj_eth56g - Prepare a single port for time adjust 1659 * @hw: pointer to HW struct 1660 * @port: Port number to be programmed 1661 * @time: time in cycles to adjust the port clocks 1662 * 1663 * Program the port for an atomic adjustment by writing the Tx and Rx timer 1664 * registers. The atomic adjustment won't be completed until the driver issues 1665 * an ICE_PTP_ADJ_TIME command. 1666 * 1667 * Note that time is not in units of nanoseconds. It is in clock time 1668 * including the lower sub-nanosecond portion of the port timer. 1669 * 1670 * Negative adjustments are supported using 2s complement arithmetic. 1671 * 1672 * Return: 1673 * * %0 - success 1674 * * %other - failed to write to PHY 1675 */ 1676 static int ice_ptp_prep_port_adj_eth56g(struct ice_hw *hw, u8 port, s64 time) 1677 { 1678 u32 l_time, u_time; 1679 int err; 1680 1681 l_time = lower_32_bits(time); 1682 u_time = upper_32_bits(time); 1683 1684 /* Tx case */ 1685 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_TIMER_INC_PRE_L, 1686 l_time); 1687 if (err) 1688 goto exit_err; 1689 1690 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_TIMER_INC_PRE_U, 1691 u_time); 1692 if (err) 1693 goto exit_err; 1694 1695 /* Rx case */ 1696 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_RX_TIMER_INC_PRE_L, 1697 l_time); 1698 if (err) 1699 goto exit_err; 1700 1701 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_RX_TIMER_INC_PRE_U, 1702 u_time); 1703 if (err) 1704 goto exit_err; 1705 1706 return 0; 1707 1708 exit_err: 1709 ice_debug(hw, ICE_DBG_PTP, "Failed to write time adjust for port %u, err %d\n", 1710 port, err); 1711 return err; 1712 } 1713 1714 /** 1715 * ice_ptp_prep_phy_adj_eth56g - Prep PHY ports for a time adjustment 1716 * @hw: pointer to HW struct 1717 * @adj: adjustment in nanoseconds 1718 * 1719 * Prepare the PHY ports for an atomic time adjustment by programming the PHY 1720 * Tx and Rx port registers. The actual adjustment is completed by issuing an 1721 * ICE_PTP_ADJ_TIME or ICE_PTP_ADJ_TIME_AT_TIME sync command. 1722 * 1723 * Return: 1724 * * %0 - success 1725 * * %other - failed to write to PHY 1726 */ 1727 static int ice_ptp_prep_phy_adj_eth56g(struct ice_hw *hw, s32 adj) 1728 { 1729 s64 cycles; 1730 u8 port; 1731 1732 /* The port clock supports adjustment of the sub-nanosecond portion of 1733 * the clock (lowest 32 bits). We shift the provided adjustment in 1734 * nanoseconds by 32 to calculate the appropriate adjustment to program 1735 * into the PHY ports. 1736 */ 1737 cycles = (s64)adj << 32; 1738 1739 for (port = 0; port < hw->ptp.num_lports; port++) { 1740 int err; 1741 1742 err = ice_ptp_prep_port_adj_eth56g(hw, port, cycles); 1743 if (err) 1744 return err; 1745 } 1746 1747 return 0; 1748 } 1749 1750 /** 1751 * ice_ptp_prep_phy_incval_eth56g - Prepare PHY ports for time adjustment 1752 * @hw: pointer to HW struct 1753 * @incval: new increment value to prepare 1754 * 1755 * Prepare each of the PHY ports for a new increment value by programming the 1756 * port's TIMETUS registers. The new increment value will be updated after 1757 * issuing an ICE_PTP_INIT_INCVAL command. 1758 * 1759 * Return: 1760 * * %0 - success 1761 * * %other - failed to write to PHY 1762 */ 1763 static int ice_ptp_prep_phy_incval_eth56g(struct ice_hw *hw, u64 incval) 1764 { 1765 u8 port; 1766 1767 for (port = 0; port < hw->ptp.num_lports; port++) { 1768 int err; 1769 1770 err = ice_write_40b_ptp_reg_eth56g(hw, port, PHY_REG_TIMETUS_L, 1771 incval); 1772 if (err) { 1773 ice_debug(hw, ICE_DBG_PTP, "Failed to write incval for port %u, err %d\n", 1774 port, err); 1775 return err; 1776 } 1777 } 1778 1779 return 0; 1780 } 1781 1782 /** 1783 * ice_ptp_read_port_capture_eth56g - Read a port's local time capture 1784 * @hw: pointer to HW struct 1785 * @port: Port number to read 1786 * @tx_ts: on return, the Tx port time capture 1787 * @rx_ts: on return, the Rx port time capture 1788 * 1789 * Read the port's Tx and Rx local time capture values. 1790 * 1791 * Return: 1792 * * %0 - success 1793 * * %other - failed to read from PHY 1794 */ 1795 static int ice_ptp_read_port_capture_eth56g(struct ice_hw *hw, u8 port, 1796 u64 *tx_ts, u64 *rx_ts) 1797 { 1798 int err; 1799 1800 /* Tx case */ 1801 err = ice_read_64b_ptp_reg_eth56g(hw, port, PHY_REG_TX_CAPTURE_L, 1802 tx_ts); 1803 if (err) { 1804 ice_debug(hw, ICE_DBG_PTP, "Failed to read REG_TX_CAPTURE, err %d\n", 1805 err); 1806 return err; 1807 } 1808 1809 ice_debug(hw, ICE_DBG_PTP, "tx_init = %#016llx\n", *tx_ts); 1810 1811 /* Rx case */ 1812 err = ice_read_64b_ptp_reg_eth56g(hw, port, PHY_REG_RX_CAPTURE_L, 1813 rx_ts); 1814 if (err) { 1815 ice_debug(hw, ICE_DBG_PTP, "Failed to read RX_CAPTURE, err %d\n", 1816 err); 1817 return err; 1818 } 1819 1820 ice_debug(hw, ICE_DBG_PTP, "rx_init = %#016llx\n", *rx_ts); 1821 1822 return 0; 1823 } 1824 1825 /** 1826 * ice_ptp_write_port_cmd_eth56g - Prepare a single PHY port for a timer command 1827 * @hw: pointer to HW struct 1828 * @port: Port to which cmd has to be sent 1829 * @cmd: Command to be sent to the port 1830 * 1831 * Prepare the requested port for an upcoming timer sync command. 1832 * 1833 * Return: 1834 * * %0 - success 1835 * * %other - failed to write to PHY 1836 */ 1837 static int ice_ptp_write_port_cmd_eth56g(struct ice_hw *hw, u8 port, 1838 enum ice_ptp_tmr_cmd cmd) 1839 { 1840 u32 val = ice_ptp_tmr_cmd_to_port_reg(hw, cmd); 1841 int err; 1842 1843 /* Tx case */ 1844 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_TMR_CMD, val); 1845 if (err) { 1846 ice_debug(hw, ICE_DBG_PTP, "Failed to write back TX_TMR_CMD, err %d\n", 1847 err); 1848 return err; 1849 } 1850 1851 /* Rx case */ 1852 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_RX_TMR_CMD, val); 1853 if (err) { 1854 ice_debug(hw, ICE_DBG_PTP, "Failed to write back RX_TMR_CMD, err %d\n", 1855 err); 1856 return err; 1857 } 1858 1859 return 0; 1860 } 1861 1862 /** 1863 * ice_phy_get_speed_eth56g - Get link speed based on PHY link type 1864 * @li: pointer to link information struct 1865 * 1866 * Return: simplified ETH56G PHY speed 1867 */ 1868 static enum ice_eth56g_link_spd 1869 ice_phy_get_speed_eth56g(struct ice_link_status *li) 1870 { 1871 u16 speed = ice_get_link_speed_based_on_phy_type(li->phy_type_low, 1872 li->phy_type_high); 1873 1874 switch (speed) { 1875 case ICE_AQ_LINK_SPEED_1000MB: 1876 return ICE_ETH56G_LNK_SPD_1G; 1877 case ICE_AQ_LINK_SPEED_2500MB: 1878 return ICE_ETH56G_LNK_SPD_2_5G; 1879 case ICE_AQ_LINK_SPEED_10GB: 1880 return ICE_ETH56G_LNK_SPD_10G; 1881 case ICE_AQ_LINK_SPEED_25GB: 1882 return ICE_ETH56G_LNK_SPD_25G; 1883 case ICE_AQ_LINK_SPEED_40GB: 1884 return ICE_ETH56G_LNK_SPD_40G; 1885 case ICE_AQ_LINK_SPEED_50GB: 1886 switch (li->phy_type_low) { 1887 case ICE_PHY_TYPE_LOW_50GBASE_SR: 1888 case ICE_PHY_TYPE_LOW_50GBASE_FR: 1889 case ICE_PHY_TYPE_LOW_50GBASE_LR: 1890 case ICE_PHY_TYPE_LOW_50GBASE_KR_PAM4: 1891 case ICE_PHY_TYPE_LOW_50G_AUI1_AOC_ACC: 1892 case ICE_PHY_TYPE_LOW_50G_AUI1: 1893 return ICE_ETH56G_LNK_SPD_50G; 1894 default: 1895 return ICE_ETH56G_LNK_SPD_50G2; 1896 } 1897 case ICE_AQ_LINK_SPEED_100GB: 1898 if (li->phy_type_high || 1899 li->phy_type_low == ICE_PHY_TYPE_LOW_100GBASE_SR2) 1900 return ICE_ETH56G_LNK_SPD_100G2; 1901 else 1902 return ICE_ETH56G_LNK_SPD_100G; 1903 default: 1904 return ICE_ETH56G_LNK_SPD_1G; 1905 } 1906 } 1907 1908 /** 1909 * ice_phy_cfg_parpcs_eth56g - Configure TUs per PAR/PCS clock cycle 1910 * @hw: pointer to the HW struct 1911 * @port: port to configure 1912 * 1913 * Configure the number of TUs for the PAR and PCS clocks used as part of the 1914 * timestamp calibration process. 1915 * 1916 * Return: 1917 * * %0 - success 1918 * * %other - PHY read/write failed 1919 */ 1920 static int ice_phy_cfg_parpcs_eth56g(struct ice_hw *hw, u8 port) 1921 { 1922 u8 port_blk = port & ~(ICE_PORTS_PER_QUAD - 1); 1923 u32 val; 1924 int err; 1925 1926 err = ice_write_xpcs_reg_eth56g(hw, port, PHY_VENDOR_TXLANE_THRESH, 1927 ICE_ETH56G_NOMINAL_THRESH4); 1928 if (err) { 1929 ice_debug(hw, ICE_DBG_PTP, "Failed to read VENDOR_TXLANE_THRESH, status: %d", 1930 err); 1931 return err; 1932 } 1933 1934 switch (ice_phy_get_speed_eth56g(&hw->port_info->phy.link_info)) { 1935 case ICE_ETH56G_LNK_SPD_1G: 1936 case ICE_ETH56G_LNK_SPD_2_5G: 1937 err = ice_read_ptp_reg_eth56g(hw, port_blk, 1938 PHY_GPCS_CONFIG_REG0, &val); 1939 if (err) { 1940 ice_debug(hw, ICE_DBG_PTP, "Failed to read PHY_GPCS_CONFIG_REG0, status: %d", 1941 err); 1942 return err; 1943 } 1944 1945 val &= ~PHY_GPCS_CONFIG_REG0_TX_THR_M; 1946 val |= FIELD_PREP(PHY_GPCS_CONFIG_REG0_TX_THR_M, 1947 ICE_ETH56G_NOMINAL_TX_THRESH); 1948 1949 err = ice_write_ptp_reg_eth56g(hw, port_blk, 1950 PHY_GPCS_CONFIG_REG0, val); 1951 if (err) { 1952 ice_debug(hw, ICE_DBG_PTP, "Failed to write PHY_GPCS_CONFIG_REG0, status: %d", 1953 err); 1954 return err; 1955 } 1956 break; 1957 default: 1958 break; 1959 } 1960 1961 err = ice_write_40b_ptp_reg_eth56g(hw, port, PHY_PCS_REF_TUS_L, 1962 ICE_ETH56G_NOMINAL_PCS_REF_TUS); 1963 if (err) { 1964 ice_debug(hw, ICE_DBG_PTP, "Failed to write PHY_PCS_REF_TUS, status: %d", 1965 err); 1966 return err; 1967 } 1968 1969 err = ice_write_40b_ptp_reg_eth56g(hw, port, PHY_PCS_REF_INC_L, 1970 ICE_ETH56G_NOMINAL_PCS_REF_INC); 1971 if (err) { 1972 ice_debug(hw, ICE_DBG_PTP, "Failed to write PHY_PCS_REF_INC, status: %d", 1973 err); 1974 return err; 1975 } 1976 1977 return 0; 1978 } 1979 1980 /** 1981 * ice_phy_cfg_ptp_1step_eth56g - Configure 1-step PTP settings 1982 * @hw: Pointer to the HW struct 1983 * @port: Port to configure 1984 * 1985 * Return: 1986 * * %0 - success 1987 * * %other - PHY read/write failed 1988 */ 1989 int ice_phy_cfg_ptp_1step_eth56g(struct ice_hw *hw, u8 port) 1990 { 1991 u8 port_blk = port & ~(ICE_PORTS_PER_QUAD - 1); 1992 u8 blk_port = port & (ICE_PORTS_PER_QUAD - 1); 1993 bool enable, sfd_ena; 1994 u32 val, peer_delay; 1995 int err; 1996 1997 enable = hw->ptp.phy.eth56g.onestep_ena; 1998 peer_delay = hw->ptp.phy.eth56g.peer_delay; 1999 sfd_ena = hw->ptp.phy.eth56g.sfd_ena; 2000 2001 /* PHY_PTP_1STEP_CONFIG */ 2002 err = ice_read_ptp_reg_eth56g(hw, port_blk, PHY_PTP_1STEP_CONFIG, &val); 2003 if (err) 2004 return err; 2005 2006 if (enable) 2007 val |= blk_port; 2008 else 2009 val &= ~blk_port; 2010 2011 val &= ~(PHY_PTP_1STEP_T1S_UP64_M | PHY_PTP_1STEP_T1S_DELTA_M); 2012 2013 err = ice_write_ptp_reg_eth56g(hw, port_blk, PHY_PTP_1STEP_CONFIG, val); 2014 if (err) 2015 return err; 2016 2017 /* PHY_PTP_1STEP_PEER_DELAY */ 2018 val = FIELD_PREP(PHY_PTP_1STEP_PD_DELAY_M, peer_delay); 2019 if (peer_delay) 2020 val |= PHY_PTP_1STEP_PD_ADD_PD_M; 2021 val |= PHY_PTP_1STEP_PD_DLY_V_M; 2022 err = ice_write_ptp_reg_eth56g(hw, port_blk, 2023 PHY_PTP_1STEP_PEER_DELAY(blk_port), val); 2024 if (err) 2025 return err; 2026 2027 val &= ~PHY_PTP_1STEP_PD_DLY_V_M; 2028 err = ice_write_ptp_reg_eth56g(hw, port_blk, 2029 PHY_PTP_1STEP_PEER_DELAY(blk_port), val); 2030 if (err) 2031 return err; 2032 2033 /* PHY_MAC_XIF_MODE */ 2034 err = ice_read_mac_reg_eth56g(hw, port, PHY_MAC_XIF_MODE, &val); 2035 if (err) 2036 return err; 2037 2038 val &= ~(PHY_MAC_XIF_1STEP_ENA_M | PHY_MAC_XIF_TS_BIN_MODE_M | 2039 PHY_MAC_XIF_TS_SFD_ENA_M | PHY_MAC_XIF_GMII_TS_SEL_M); 2040 2041 switch (ice_phy_get_speed_eth56g(&hw->port_info->phy.link_info)) { 2042 case ICE_ETH56G_LNK_SPD_1G: 2043 case ICE_ETH56G_LNK_SPD_2_5G: 2044 val |= PHY_MAC_XIF_GMII_TS_SEL_M; 2045 break; 2046 default: 2047 break; 2048 } 2049 2050 val |= FIELD_PREP(PHY_MAC_XIF_1STEP_ENA_M, enable) | 2051 FIELD_PREP(PHY_MAC_XIF_TS_BIN_MODE_M, enable) | 2052 FIELD_PREP(PHY_MAC_XIF_TS_SFD_ENA_M, sfd_ena); 2053 2054 return ice_write_mac_reg_eth56g(hw, port, PHY_MAC_XIF_MODE, val); 2055 } 2056 2057 /** 2058 * mul_u32_u32_fx_q9 - Multiply two u32 fixed point Q9 values 2059 * @a: multiplier value 2060 * @b: multiplicand value 2061 * 2062 * Return: result of multiplication 2063 */ 2064 static u32 mul_u32_u32_fx_q9(u32 a, u32 b) 2065 { 2066 return (u32)(((u64)a * b) >> ICE_ETH56G_MAC_CFG_FRAC_W); 2067 } 2068 2069 /** 2070 * add_u32_u32_fx - Add two u32 fixed point values and discard overflow 2071 * @a: first value 2072 * @b: second value 2073 * 2074 * Return: result of addition 2075 */ 2076 static u32 add_u32_u32_fx(u32 a, u32 b) 2077 { 2078 return lower_32_bits(((u64)a + b)); 2079 } 2080 2081 /** 2082 * ice_ptp_calc_bitslip_eth56g - Calculate bitslip value 2083 * @hw: pointer to the HW struct 2084 * @port: port to configure 2085 * @bs: bitslip multiplier 2086 * @fc: FC-FEC enabled 2087 * @rs: RS-FEC enabled 2088 * @spd: link speed 2089 * 2090 * Return: calculated bitslip value 2091 */ 2092 static u32 ice_ptp_calc_bitslip_eth56g(struct ice_hw *hw, u8 port, u32 bs, 2093 bool fc, bool rs, 2094 enum ice_eth56g_link_spd spd) 2095 { 2096 u8 port_offset = port & (ICE_PORTS_PER_QUAD - 1); 2097 u8 port_blk = port & ~(ICE_PORTS_PER_QUAD - 1); 2098 u32 bitslip; 2099 int err; 2100 2101 if (!bs || rs) 2102 return 0; 2103 2104 if (spd == ICE_ETH56G_LNK_SPD_1G || spd == ICE_ETH56G_LNK_SPD_2_5G) 2105 err = ice_read_gpcs_reg_eth56g(hw, port, PHY_GPCS_BITSLIP, 2106 &bitslip); 2107 else 2108 err = ice_read_ptp_reg_eth56g(hw, port_blk, 2109 PHY_REG_SD_BIT_SLIP(port_offset), 2110 &bitslip); 2111 if (err) 2112 return 0; 2113 2114 if (spd == ICE_ETH56G_LNK_SPD_1G && !bitslip) { 2115 /* Bitslip register value of 0 corresponds to 10 so substitute 2116 * it for calculations 2117 */ 2118 bitslip = 10; 2119 } else if (spd == ICE_ETH56G_LNK_SPD_10G || 2120 spd == ICE_ETH56G_LNK_SPD_25G) { 2121 if (fc) 2122 bitslip = bitslip * 2 + 32; 2123 else 2124 bitslip = (u32)((s32)bitslip * -1 + 20); 2125 } 2126 2127 bitslip <<= ICE_ETH56G_MAC_CFG_FRAC_W; 2128 return mul_u32_u32_fx_q9(bitslip, bs); 2129 } 2130 2131 /** 2132 * ice_ptp_calc_deskew_eth56g - Calculate deskew value 2133 * @hw: pointer to the HW struct 2134 * @port: port to configure 2135 * @ds: deskew multiplier 2136 * @rs: RS-FEC enabled 2137 * @spd: link speed 2138 * 2139 * Return: calculated deskew value 2140 */ 2141 static u32 ice_ptp_calc_deskew_eth56g(struct ice_hw *hw, u8 port, u32 ds, 2142 bool rs, enum ice_eth56g_link_spd spd) 2143 { 2144 u32 deskew_i, deskew_f; 2145 int err; 2146 2147 if (!ds) 2148 return 0; 2149 2150 read_poll_timeout(ice_read_ptp_reg_eth56g, err, 2151 FIELD_GET(PHY_REG_DESKEW_0_VALID, deskew_i), 500, 2152 50 * USEC_PER_MSEC, false, hw, port, PHY_REG_DESKEW_0, 2153 &deskew_i); 2154 if (err) 2155 return err; 2156 2157 deskew_f = FIELD_GET(PHY_REG_DESKEW_0_RLEVEL_FRAC, deskew_i); 2158 deskew_i = FIELD_GET(PHY_REG_DESKEW_0_RLEVEL, deskew_i); 2159 2160 if (rs && spd == ICE_ETH56G_LNK_SPD_50G2) 2161 ds = 0x633; /* 3.1 */ 2162 else if (rs && spd == ICE_ETH56G_LNK_SPD_100G) 2163 ds = 0x31b; /* 1.552 */ 2164 2165 deskew_i = FIELD_PREP(ICE_ETH56G_MAC_CFG_RX_OFFSET_INT, deskew_i); 2166 /* Shift 3 fractional bits to the end of the integer part */ 2167 deskew_f <<= ICE_ETH56G_MAC_CFG_FRAC_W - PHY_REG_DESKEW_0_RLEVEL_FRAC_W; 2168 return mul_u32_u32_fx_q9(deskew_i | deskew_f, ds); 2169 } 2170 2171 /** 2172 * ice_phy_set_offsets_eth56g - Set Tx/Rx offset values 2173 * @hw: pointer to the HW struct 2174 * @port: port to configure 2175 * @spd: link speed 2176 * @cfg: structure to store output values 2177 * @fc: FC-FEC enabled 2178 * @rs: RS-FEC enabled 2179 * 2180 * Return: 2181 * * %0 - success 2182 * * %other - failed to write to PHY 2183 */ 2184 static int ice_phy_set_offsets_eth56g(struct ice_hw *hw, u8 port, 2185 enum ice_eth56g_link_spd spd, 2186 const struct ice_eth56g_mac_reg_cfg *cfg, 2187 bool fc, bool rs) 2188 { 2189 u32 rx_offset, tx_offset, bs_ds; 2190 bool onestep, sfd; 2191 2192 onestep = hw->ptp.phy.eth56g.onestep_ena; 2193 sfd = hw->ptp.phy.eth56g.sfd_ena; 2194 bs_ds = cfg->rx_offset.bs_ds; 2195 2196 if (fc) 2197 rx_offset = cfg->rx_offset.fc; 2198 else if (rs) 2199 rx_offset = cfg->rx_offset.rs; 2200 else 2201 rx_offset = cfg->rx_offset.no_fec; 2202 2203 rx_offset = add_u32_u32_fx(rx_offset, cfg->rx_offset.serdes); 2204 if (sfd) 2205 rx_offset = add_u32_u32_fx(rx_offset, cfg->rx_offset.sfd); 2206 2207 if (spd < ICE_ETH56G_LNK_SPD_40G) 2208 bs_ds = ice_ptp_calc_bitslip_eth56g(hw, port, bs_ds, fc, rs, 2209 spd); 2210 else 2211 bs_ds = ice_ptp_calc_deskew_eth56g(hw, port, bs_ds, rs, spd); 2212 rx_offset = add_u32_u32_fx(rx_offset, bs_ds); 2213 rx_offset &= ICE_ETH56G_MAC_CFG_RX_OFFSET_INT | 2214 ICE_ETH56G_MAC_CFG_RX_OFFSET_FRAC; 2215 2216 if (fc) 2217 tx_offset = cfg->tx_offset.fc; 2218 else if (rs) 2219 tx_offset = cfg->tx_offset.rs; 2220 else 2221 tx_offset = cfg->tx_offset.no_fec; 2222 tx_offset += cfg->tx_offset.serdes + cfg->tx_offset.sfd * sfd + 2223 cfg->tx_offset.onestep * onestep; 2224 2225 ice_write_mac_reg_eth56g(hw, port, PHY_MAC_RX_OFFSET, rx_offset); 2226 return ice_write_mac_reg_eth56g(hw, port, PHY_MAC_TX_OFFSET, tx_offset); 2227 } 2228 2229 /** 2230 * ice_phy_cfg_mac_eth56g - Configure MAC for PTP 2231 * @hw: Pointer to the HW struct 2232 * @port: Port to configure 2233 * 2234 * Return: 2235 * * %0 - success 2236 * * %other - failed to write to PHY 2237 */ 2238 static int ice_phy_cfg_mac_eth56g(struct ice_hw *hw, u8 port) 2239 { 2240 const struct ice_eth56g_mac_reg_cfg *cfg; 2241 enum ice_eth56g_link_spd spd; 2242 struct ice_link_status *li; 2243 bool fc = false; 2244 bool rs = false; 2245 bool onestep; 2246 u32 val; 2247 int err; 2248 2249 onestep = hw->ptp.phy.eth56g.onestep_ena; 2250 li = &hw->port_info->phy.link_info; 2251 spd = ice_phy_get_speed_eth56g(li); 2252 if (!!(li->an_info & ICE_AQ_FEC_EN)) { 2253 if (spd == ICE_ETH56G_LNK_SPD_10G) { 2254 fc = true; 2255 } else { 2256 fc = !!(li->fec_info & ICE_AQ_LINK_25G_KR_FEC_EN); 2257 rs = !!(li->fec_info & ~ICE_AQ_LINK_25G_KR_FEC_EN); 2258 } 2259 } 2260 cfg = ð56g_mac_cfg[spd]; 2261 2262 err = ice_write_mac_reg_eth56g(hw, port, PHY_MAC_RX_MODULO, 0); 2263 if (err) 2264 return err; 2265 2266 err = ice_write_mac_reg_eth56g(hw, port, PHY_MAC_TX_MODULO, 0); 2267 if (err) 2268 return err; 2269 2270 val = FIELD_PREP(PHY_MAC_TSU_CFG_TX_MODE_M, 2271 cfg->tx_mode.def + rs * cfg->tx_mode.rs) | 2272 FIELD_PREP(PHY_MAC_TSU_CFG_TX_MII_MK_DLY_M, cfg->tx_mk_dly) | 2273 FIELD_PREP(PHY_MAC_TSU_CFG_TX_MII_CW_DLY_M, 2274 cfg->tx_cw_dly.def + 2275 onestep * cfg->tx_cw_dly.onestep) | 2276 FIELD_PREP(PHY_MAC_TSU_CFG_RX_MODE_M, 2277 cfg->rx_mode.def + rs * cfg->rx_mode.rs) | 2278 FIELD_PREP(PHY_MAC_TSU_CFG_RX_MII_MK_DLY_M, 2279 cfg->rx_mk_dly.def + rs * cfg->rx_mk_dly.rs) | 2280 FIELD_PREP(PHY_MAC_TSU_CFG_RX_MII_CW_DLY_M, 2281 cfg->rx_cw_dly.def + rs * cfg->rx_cw_dly.rs) | 2282 FIELD_PREP(PHY_MAC_TSU_CFG_BLKS_PER_CLK_M, cfg->blks_per_clk); 2283 err = ice_write_mac_reg_eth56g(hw, port, PHY_MAC_TSU_CONFIG, val); 2284 if (err) 2285 return err; 2286 2287 err = ice_write_mac_reg_eth56g(hw, port, PHY_MAC_BLOCKTIME, 2288 cfg->blktime); 2289 if (err) 2290 return err; 2291 2292 err = ice_phy_set_offsets_eth56g(hw, port, spd, cfg, fc, rs); 2293 if (err) 2294 return err; 2295 2296 if (spd == ICE_ETH56G_LNK_SPD_25G && !rs) 2297 val = 0; 2298 else 2299 val = cfg->mktime; 2300 2301 return ice_write_mac_reg_eth56g(hw, port, PHY_MAC_MARKERTIME, val); 2302 } 2303 2304 /** 2305 * ice_phy_cfg_intr_eth56g - Configure TX timestamp interrupt 2306 * @hw: pointer to the HW struct 2307 * @port: the timestamp port 2308 * @ena: enable or disable interrupt 2309 * @threshold: interrupt threshold 2310 * 2311 * Configure TX timestamp interrupt for the specified port 2312 * 2313 * Return: 2314 * * %0 - success 2315 * * %other - PHY read/write failed 2316 */ 2317 int ice_phy_cfg_intr_eth56g(struct ice_hw *hw, u8 port, bool ena, u8 threshold) 2318 { 2319 int err; 2320 u32 val; 2321 2322 err = ice_read_ptp_reg_eth56g(hw, port, PHY_REG_TS_INT_CONFIG, &val); 2323 if (err) 2324 return err; 2325 2326 if (ena) { 2327 val |= PHY_TS_INT_CONFIG_ENA_M; 2328 val &= ~PHY_TS_INT_CONFIG_THRESHOLD_M; 2329 val |= FIELD_PREP(PHY_TS_INT_CONFIG_THRESHOLD_M, threshold); 2330 } else { 2331 val &= ~PHY_TS_INT_CONFIG_ENA_M; 2332 } 2333 2334 return ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TS_INT_CONFIG, val); 2335 } 2336 2337 /** 2338 * ice_read_phy_and_phc_time_eth56g - Simultaneously capture PHC and PHY time 2339 * @hw: pointer to the HW struct 2340 * @port: the PHY port to read 2341 * @phy_time: on return, the 64bit PHY timer value 2342 * @phc_time: on return, the lower 64bits of PHC time 2343 * 2344 * Issue a ICE_PTP_READ_TIME timer command to simultaneously capture the PHY 2345 * and PHC timer values. 2346 * 2347 * Return: 2348 * * %0 - success 2349 * * %other - PHY read/write failed 2350 */ 2351 static int ice_read_phy_and_phc_time_eth56g(struct ice_hw *hw, u8 port, 2352 u64 *phy_time, u64 *phc_time) 2353 { 2354 u64 tx_time, rx_time; 2355 u32 zo, lo; 2356 u8 tmr_idx; 2357 int err; 2358 2359 tmr_idx = ice_get_ptp_src_clock_index(hw); 2360 2361 /* Prepare the PHC timer for a ICE_PTP_READ_TIME capture command */ 2362 ice_ptp_src_cmd(hw, ICE_PTP_READ_TIME); 2363 2364 /* Prepare the PHY timer for a ICE_PTP_READ_TIME capture command */ 2365 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_READ_TIME); 2366 if (err) 2367 return err; 2368 2369 /* Issue the sync to start the ICE_PTP_READ_TIME capture */ 2370 ice_ptp_exec_tmr_cmd(hw); 2371 2372 /* Read the captured PHC time from the shadow time registers */ 2373 zo = rd32(hw, GLTSYN_SHTIME_0(tmr_idx)); 2374 lo = rd32(hw, GLTSYN_SHTIME_L(tmr_idx)); 2375 *phc_time = (u64)lo << 32 | zo; 2376 2377 /* Read the captured PHY time from the PHY shadow registers */ 2378 err = ice_ptp_read_port_capture_eth56g(hw, port, &tx_time, &rx_time); 2379 if (err) 2380 return err; 2381 2382 /* If the PHY Tx and Rx timers don't match, log a warning message. 2383 * Note that this should not happen in normal circumstances since the 2384 * driver always programs them together. 2385 */ 2386 if (tx_time != rx_time) 2387 dev_warn(ice_hw_to_dev(hw), "PHY port %u Tx and Rx timers do not match, tx_time 0x%016llX, rx_time 0x%016llX\n", 2388 port, tx_time, rx_time); 2389 2390 *phy_time = tx_time; 2391 2392 return 0; 2393 } 2394 2395 /** 2396 * ice_sync_phy_timer_eth56g - Synchronize the PHY timer with PHC timer 2397 * @hw: pointer to the HW struct 2398 * @port: the PHY port to synchronize 2399 * 2400 * Perform an adjustment to ensure that the PHY and PHC timers are in sync. 2401 * This is done by issuing a ICE_PTP_READ_TIME command which triggers a 2402 * simultaneous read of the PHY timer and PHC timer. Then we use the 2403 * difference to calculate an appropriate 2s complement addition to add 2404 * to the PHY timer in order to ensure it reads the same value as the 2405 * primary PHC timer. 2406 * 2407 * Return: 2408 * * %0 - success 2409 * * %-EBUSY- failed to acquire PTP semaphore 2410 * * %other - PHY read/write failed 2411 */ 2412 static int ice_sync_phy_timer_eth56g(struct ice_hw *hw, u8 port) 2413 { 2414 u64 phc_time, phy_time, difference; 2415 int err; 2416 2417 if (!ice_ptp_lock(hw)) { 2418 ice_debug(hw, ICE_DBG_PTP, "Failed to acquire PTP semaphore\n"); 2419 return -EBUSY; 2420 } 2421 2422 err = ice_read_phy_and_phc_time_eth56g(hw, port, &phy_time, &phc_time); 2423 if (err) 2424 goto err_unlock; 2425 2426 /* Calculate the amount required to add to the port time in order for 2427 * it to match the PHC time. 2428 * 2429 * Note that the port adjustment is done using 2s complement 2430 * arithmetic. This is convenient since it means that we can simply 2431 * calculate the difference between the PHC time and the port time, 2432 * and it will be interpreted correctly. 2433 */ 2434 2435 ice_ptp_src_cmd(hw, ICE_PTP_NOP); 2436 difference = phc_time - phy_time; 2437 2438 err = ice_ptp_prep_port_adj_eth56g(hw, port, (s64)difference); 2439 if (err) 2440 goto err_unlock; 2441 2442 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_ADJ_TIME); 2443 if (err) 2444 goto err_unlock; 2445 2446 /* Issue the sync to activate the time adjustment */ 2447 ice_ptp_exec_tmr_cmd(hw); 2448 2449 /* Re-capture the timer values to flush the command registers and 2450 * verify that the time was properly adjusted. 2451 */ 2452 err = ice_read_phy_and_phc_time_eth56g(hw, port, &phy_time, &phc_time); 2453 if (err) 2454 goto err_unlock; 2455 2456 dev_info(ice_hw_to_dev(hw), 2457 "Port %u PHY time synced to PHC: 0x%016llX, 0x%016llX\n", 2458 port, phy_time, phc_time); 2459 2460 err_unlock: 2461 ice_ptp_unlock(hw); 2462 return err; 2463 } 2464 2465 /** 2466 * ice_stop_phy_timer_eth56g - Stop the PHY clock timer 2467 * @hw: pointer to the HW struct 2468 * @port: the PHY port to stop 2469 * @soft_reset: if true, hold the SOFT_RESET bit of PHY_REG_PS 2470 * 2471 * Stop the clock of a PHY port. This must be done as part of the flow to 2472 * re-calibrate Tx and Rx timestamping offsets whenever the clock time is 2473 * initialized or when link speed changes. 2474 * 2475 * Return: 2476 * * %0 - success 2477 * * %other - failed to write to PHY 2478 */ 2479 int ice_stop_phy_timer_eth56g(struct ice_hw *hw, u8 port, bool soft_reset) 2480 { 2481 int err; 2482 2483 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_OFFSET_READY, 0); 2484 if (err) 2485 return err; 2486 2487 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_RX_OFFSET_READY, 0); 2488 if (err) 2489 return err; 2490 2491 ice_debug(hw, ICE_DBG_PTP, "Disabled clock on PHY port %u\n", port); 2492 2493 return 0; 2494 } 2495 2496 /** 2497 * ice_start_phy_timer_eth56g - Start the PHY clock timer 2498 * @hw: pointer to the HW struct 2499 * @port: the PHY port to start 2500 * 2501 * Start the clock of a PHY port. This must be done as part of the flow to 2502 * re-calibrate Tx and Rx timestamping offsets whenever the clock time is 2503 * initialized or when link speed changes. 2504 * 2505 * Return: 2506 * * %0 - success 2507 * * %other - PHY read/write failed 2508 */ 2509 int ice_start_phy_timer_eth56g(struct ice_hw *hw, u8 port) 2510 { 2511 u32 lo, hi; 2512 u64 incval; 2513 u8 tmr_idx; 2514 int err; 2515 2516 tmr_idx = ice_get_ptp_src_clock_index(hw); 2517 2518 err = ice_stop_phy_timer_eth56g(hw, port, false); 2519 if (err) 2520 return err; 2521 2522 ice_ptp_src_cmd(hw, ICE_PTP_NOP); 2523 2524 err = ice_phy_cfg_parpcs_eth56g(hw, port); 2525 if (err) 2526 return err; 2527 2528 err = ice_phy_cfg_ptp_1step_eth56g(hw, port); 2529 if (err) 2530 return err; 2531 2532 err = ice_phy_cfg_mac_eth56g(hw, port); 2533 if (err) 2534 return err; 2535 2536 lo = rd32(hw, GLTSYN_INCVAL_L(tmr_idx)); 2537 hi = rd32(hw, GLTSYN_INCVAL_H(tmr_idx)); 2538 incval = (u64)hi << 32 | lo; 2539 2540 err = ice_write_40b_ptp_reg_eth56g(hw, port, PHY_REG_TIMETUS_L, incval); 2541 if (err) 2542 return err; 2543 2544 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_INIT_INCVAL); 2545 if (err) 2546 return err; 2547 2548 ice_ptp_exec_tmr_cmd(hw); 2549 2550 err = ice_sync_phy_timer_eth56g(hw, port); 2551 if (err) 2552 return err; 2553 2554 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_TX_OFFSET_READY, 1); 2555 if (err) 2556 return err; 2557 2558 err = ice_write_ptp_reg_eth56g(hw, port, PHY_REG_RX_OFFSET_READY, 1); 2559 if (err) 2560 return err; 2561 2562 ice_debug(hw, ICE_DBG_PTP, "Enabled clock on PHY port %u\n", port); 2563 2564 return 0; 2565 } 2566 2567 /** 2568 * ice_sb_access_ena_eth56g - Enable SB devices (PHY and others) access 2569 * @hw: pointer to HW struct 2570 * @enable: Enable or disable access 2571 * 2572 * Enable sideband devices (PHY and others) access. 2573 */ 2574 static void ice_sb_access_ena_eth56g(struct ice_hw *hw, bool enable) 2575 { 2576 u32 val = rd32(hw, PF_SB_REM_DEV_CTL); 2577 2578 if (enable) 2579 val |= BIT(eth56g_phy_0) | BIT(cgu) | BIT(eth56g_phy_1); 2580 else 2581 val &= ~(BIT(eth56g_phy_0) | BIT(cgu) | BIT(eth56g_phy_1)); 2582 2583 wr32(hw, PF_SB_REM_DEV_CTL, val); 2584 } 2585 2586 /** 2587 * ice_ptp_init_phc_eth56g - Perform E82X specific PHC initialization 2588 * @hw: pointer to HW struct 2589 * 2590 * Perform PHC initialization steps specific to E82X devices. 2591 * 2592 * Return: 2593 * * %0 - success 2594 * * %other - failed to initialize CGU 2595 */ 2596 static int ice_ptp_init_phc_eth56g(struct ice_hw *hw) 2597 { 2598 ice_sb_access_ena_eth56g(hw, true); 2599 /* Initialize the Clock Generation Unit */ 2600 return ice_init_cgu_e82x(hw); 2601 } 2602 2603 /** 2604 * ice_ptp_read_tx_hwtstamp_status_eth56g - Get TX timestamp status 2605 * @hw: pointer to the HW struct 2606 * @ts_status: the timestamp mask pointer 2607 * 2608 * Read the PHY Tx timestamp status mask indicating which ports have Tx 2609 * timestamps available. 2610 * 2611 * Return: 2612 * * %0 - success 2613 * * %other - failed to read from PHY 2614 */ 2615 int ice_ptp_read_tx_hwtstamp_status_eth56g(struct ice_hw *hw, u32 *ts_status) 2616 { 2617 const struct ice_eth56g_params *params = &hw->ptp.phy.eth56g; 2618 u8 phy, mask; 2619 u32 status; 2620 2621 mask = (1 << hw->ptp.ports_per_phy) - 1; 2622 *ts_status = 0; 2623 2624 for (phy = 0; phy < params->num_phys; phy++) { 2625 int err; 2626 2627 err = ice_read_phy_eth56g(hw, phy, PHY_PTP_INT_STATUS, &status); 2628 if (err) 2629 return err; 2630 2631 *ts_status |= (status & mask) << (phy * hw->ptp.ports_per_phy); 2632 } 2633 2634 ice_debug(hw, ICE_DBG_PTP, "PHY interrupt err: %x\n", *ts_status); 2635 2636 return 0; 2637 } 2638 2639 /** 2640 * ice_get_phy_tx_tstamp_ready_eth56g - Read the Tx memory status register 2641 * @hw: pointer to the HW struct 2642 * @port: the PHY port to read from 2643 * @tstamp_ready: contents of the Tx memory status register 2644 * 2645 * Read the PHY_REG_TX_MEMORY_STATUS register indicating which timestamps in 2646 * the PHY are ready. A set bit means the corresponding timestamp is valid and 2647 * ready to be captured from the PHY timestamp block. 2648 * 2649 * Return: 2650 * * %0 - success 2651 * * %other - failed to read from PHY 2652 */ 2653 static int ice_get_phy_tx_tstamp_ready_eth56g(struct ice_hw *hw, u8 port, 2654 u64 *tstamp_ready) 2655 { 2656 int err; 2657 2658 err = ice_read_64b_ptp_reg_eth56g(hw, port, PHY_REG_TX_MEMORY_STATUS_L, 2659 tstamp_ready); 2660 if (err) { 2661 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_MEMORY_STATUS for port %u, err %d\n", 2662 port, err); 2663 return err; 2664 } 2665 2666 return 0; 2667 } 2668 2669 /** 2670 * ice_is_muxed_topo - detect breakout 2x50G topology for E825C 2671 * @hw: pointer to the HW struct 2672 * 2673 * Return: true if it's 2x50 breakout topology, false otherwise 2674 */ 2675 static bool ice_is_muxed_topo(struct ice_hw *hw) 2676 { 2677 u8 link_topo; 2678 bool mux; 2679 u32 val; 2680 2681 val = rd32(hw, GLGEN_SWITCH_MODE_CONFIG); 2682 mux = FIELD_GET(GLGEN_SWITCH_MODE_CONFIG_25X4_QUAD_M, val); 2683 val = rd32(hw, GLGEN_MAC_LINK_TOPO); 2684 link_topo = FIELD_GET(GLGEN_MAC_LINK_TOPO_LINK_TOPO_M, val); 2685 2686 return (mux && link_topo == ICE_LINK_TOPO_UP_TO_2_LINKS); 2687 } 2688 2689 /** 2690 * ice_ptp_init_phy_e825c - initialize PHY parameters 2691 * @hw: pointer to the HW struct 2692 */ 2693 static void ice_ptp_init_phy_e825c(struct ice_hw *hw) 2694 { 2695 struct ice_ptp_hw *ptp = &hw->ptp; 2696 struct ice_eth56g_params *params; 2697 u8 phy; 2698 2699 ptp->phy_model = ICE_PHY_ETH56G; 2700 params = &ptp->phy.eth56g; 2701 params->onestep_ena = false; 2702 params->peer_delay = 0; 2703 params->sfd_ena = false; 2704 params->phy_addr[0] = eth56g_phy_0; 2705 params->phy_addr[1] = eth56g_phy_1; 2706 params->num_phys = 2; 2707 ptp->ports_per_phy = 4; 2708 ptp->num_lports = params->num_phys * ptp->ports_per_phy; 2709 2710 ice_sb_access_ena_eth56g(hw, true); 2711 for (phy = 0; phy < params->num_phys; phy++) { 2712 u32 phy_rev; 2713 int err; 2714 2715 err = ice_read_phy_eth56g(hw, phy, PHY_REG_REVISION, &phy_rev); 2716 if (err || phy_rev != PHY_REVISION_ETH56G) { 2717 ptp->phy_model = ICE_PHY_UNSUP; 2718 return; 2719 } 2720 } 2721 2722 ptp->is_2x50g_muxed_topo = ice_is_muxed_topo(hw); 2723 } 2724 2725 /* E822 family functions 2726 * 2727 * The following functions operate on the E822 family of devices. 2728 */ 2729 2730 /** 2731 * ice_fill_phy_msg_e82x - Fill message data for a PHY register access 2732 * @hw: pointer to the HW struct 2733 * @msg: the PHY message buffer to fill in 2734 * @port: the port to access 2735 * @offset: the register offset 2736 */ 2737 static void ice_fill_phy_msg_e82x(struct ice_hw *hw, 2738 struct ice_sbq_msg_input *msg, u8 port, 2739 u16 offset) 2740 { 2741 int phy_port, phy, quadtype; 2742 2743 phy_port = port % hw->ptp.ports_per_phy; 2744 phy = port / hw->ptp.ports_per_phy; 2745 quadtype = ICE_GET_QUAD_NUM(port) % 2746 ICE_GET_QUAD_NUM(hw->ptp.ports_per_phy); 2747 2748 if (quadtype == 0) { 2749 msg->msg_addr_low = P_Q0_L(P_0_BASE + offset, phy_port); 2750 msg->msg_addr_high = P_Q0_H(P_0_BASE + offset, phy_port); 2751 } else { 2752 msg->msg_addr_low = P_Q1_L(P_4_BASE + offset, phy_port); 2753 msg->msg_addr_high = P_Q1_H(P_4_BASE + offset, phy_port); 2754 } 2755 2756 if (phy == 0) 2757 msg->dest_dev = rmn_0; 2758 else if (phy == 1) 2759 msg->dest_dev = rmn_1; 2760 else 2761 msg->dest_dev = rmn_2; 2762 } 2763 2764 /** 2765 * ice_is_64b_phy_reg_e82x - Check if this is a 64bit PHY register 2766 * @low_addr: the low address to check 2767 * @high_addr: on return, contains the high address of the 64bit register 2768 * 2769 * Checks if the provided low address is one of the known 64bit PHY values 2770 * represented as two 32bit registers. If it is, return the appropriate high 2771 * register offset to use. 2772 */ 2773 static bool ice_is_64b_phy_reg_e82x(u16 low_addr, u16 *high_addr) 2774 { 2775 switch (low_addr) { 2776 case P_REG_PAR_PCS_TX_OFFSET_L: 2777 *high_addr = P_REG_PAR_PCS_TX_OFFSET_U; 2778 return true; 2779 case P_REG_PAR_PCS_RX_OFFSET_L: 2780 *high_addr = P_REG_PAR_PCS_RX_OFFSET_U; 2781 return true; 2782 case P_REG_PAR_TX_TIME_L: 2783 *high_addr = P_REG_PAR_TX_TIME_U; 2784 return true; 2785 case P_REG_PAR_RX_TIME_L: 2786 *high_addr = P_REG_PAR_RX_TIME_U; 2787 return true; 2788 case P_REG_TOTAL_TX_OFFSET_L: 2789 *high_addr = P_REG_TOTAL_TX_OFFSET_U; 2790 return true; 2791 case P_REG_TOTAL_RX_OFFSET_L: 2792 *high_addr = P_REG_TOTAL_RX_OFFSET_U; 2793 return true; 2794 case P_REG_UIX66_10G_40G_L: 2795 *high_addr = P_REG_UIX66_10G_40G_U; 2796 return true; 2797 case P_REG_UIX66_25G_100G_L: 2798 *high_addr = P_REG_UIX66_25G_100G_U; 2799 return true; 2800 case P_REG_TX_CAPTURE_L: 2801 *high_addr = P_REG_TX_CAPTURE_U; 2802 return true; 2803 case P_REG_RX_CAPTURE_L: 2804 *high_addr = P_REG_RX_CAPTURE_U; 2805 return true; 2806 case P_REG_TX_TIMER_INC_PRE_L: 2807 *high_addr = P_REG_TX_TIMER_INC_PRE_U; 2808 return true; 2809 case P_REG_RX_TIMER_INC_PRE_L: 2810 *high_addr = P_REG_RX_TIMER_INC_PRE_U; 2811 return true; 2812 default: 2813 return false; 2814 } 2815 } 2816 2817 /** 2818 * ice_is_40b_phy_reg_e82x - Check if this is a 40bit PHY register 2819 * @low_addr: the low address to check 2820 * @high_addr: on return, contains the high address of the 40bit value 2821 * 2822 * Checks if the provided low address is one of the known 40bit PHY values 2823 * split into two registers with the lower 8 bits in the low register and the 2824 * upper 32 bits in the high register. If it is, return the appropriate high 2825 * register offset to use. 2826 */ 2827 static bool ice_is_40b_phy_reg_e82x(u16 low_addr, u16 *high_addr) 2828 { 2829 switch (low_addr) { 2830 case P_REG_TIMETUS_L: 2831 *high_addr = P_REG_TIMETUS_U; 2832 return true; 2833 case P_REG_PAR_RX_TUS_L: 2834 *high_addr = P_REG_PAR_RX_TUS_U; 2835 return true; 2836 case P_REG_PAR_TX_TUS_L: 2837 *high_addr = P_REG_PAR_TX_TUS_U; 2838 return true; 2839 case P_REG_PCS_RX_TUS_L: 2840 *high_addr = P_REG_PCS_RX_TUS_U; 2841 return true; 2842 case P_REG_PCS_TX_TUS_L: 2843 *high_addr = P_REG_PCS_TX_TUS_U; 2844 return true; 2845 case P_REG_DESK_PAR_RX_TUS_L: 2846 *high_addr = P_REG_DESK_PAR_RX_TUS_U; 2847 return true; 2848 case P_REG_DESK_PAR_TX_TUS_L: 2849 *high_addr = P_REG_DESK_PAR_TX_TUS_U; 2850 return true; 2851 case P_REG_DESK_PCS_RX_TUS_L: 2852 *high_addr = P_REG_DESK_PCS_RX_TUS_U; 2853 return true; 2854 case P_REG_DESK_PCS_TX_TUS_L: 2855 *high_addr = P_REG_DESK_PCS_TX_TUS_U; 2856 return true; 2857 default: 2858 return false; 2859 } 2860 } 2861 2862 /** 2863 * ice_read_phy_reg_e82x - Read a PHY register 2864 * @hw: pointer to the HW struct 2865 * @port: PHY port to read from 2866 * @offset: PHY register offset to read 2867 * @val: on return, the contents read from the PHY 2868 * 2869 * Read a PHY register for the given port over the device sideband queue. 2870 */ 2871 static int 2872 ice_read_phy_reg_e82x(struct ice_hw *hw, u8 port, u16 offset, u32 *val) 2873 { 2874 struct ice_sbq_msg_input msg = {0}; 2875 int err; 2876 2877 ice_fill_phy_msg_e82x(hw, &msg, port, offset); 2878 msg.opcode = ice_sbq_msg_rd; 2879 2880 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 2881 if (err) { 2882 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 2883 err); 2884 return err; 2885 } 2886 2887 *val = msg.data; 2888 2889 return 0; 2890 } 2891 2892 /** 2893 * ice_read_64b_phy_reg_e82x - Read a 64bit value from PHY registers 2894 * @hw: pointer to the HW struct 2895 * @port: PHY port to read from 2896 * @low_addr: offset of the lower register to read from 2897 * @val: on return, the contents of the 64bit value from the PHY registers 2898 * 2899 * Reads the two registers associated with a 64bit value and returns it in the 2900 * val pointer. The offset always specifies the lower register offset to use. 2901 * The high offset is looked up. This function only operates on registers 2902 * known to be two parts of a 64bit value. 2903 */ 2904 static int 2905 ice_read_64b_phy_reg_e82x(struct ice_hw *hw, u8 port, u16 low_addr, u64 *val) 2906 { 2907 u32 low, high; 2908 u16 high_addr; 2909 int err; 2910 2911 /* Only operate on registers known to be split into two 32bit 2912 * registers. 2913 */ 2914 if (!ice_is_64b_phy_reg_e82x(low_addr, &high_addr)) { 2915 ice_debug(hw, ICE_DBG_PTP, "Invalid 64b register addr 0x%08x\n", 2916 low_addr); 2917 return -EINVAL; 2918 } 2919 2920 err = ice_read_phy_reg_e82x(hw, port, low_addr, &low); 2921 if (err) { 2922 ice_debug(hw, ICE_DBG_PTP, "Failed to read from low register 0x%08x\n, err %d", 2923 low_addr, err); 2924 return err; 2925 } 2926 2927 err = ice_read_phy_reg_e82x(hw, port, high_addr, &high); 2928 if (err) { 2929 ice_debug(hw, ICE_DBG_PTP, "Failed to read from high register 0x%08x\n, err %d", 2930 high_addr, err); 2931 return err; 2932 } 2933 2934 *val = (u64)high << 32 | low; 2935 2936 return 0; 2937 } 2938 2939 /** 2940 * ice_write_phy_reg_e82x - Write a PHY register 2941 * @hw: pointer to the HW struct 2942 * @port: PHY port to write to 2943 * @offset: PHY register offset to write 2944 * @val: The value to write to the register 2945 * 2946 * Write a PHY register for the given port over the device sideband queue. 2947 */ 2948 static int 2949 ice_write_phy_reg_e82x(struct ice_hw *hw, u8 port, u16 offset, u32 val) 2950 { 2951 struct ice_sbq_msg_input msg = {0}; 2952 int err; 2953 2954 ice_fill_phy_msg_e82x(hw, &msg, port, offset); 2955 msg.opcode = ice_sbq_msg_wr; 2956 msg.data = val; 2957 2958 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 2959 if (err) { 2960 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 2961 err); 2962 return err; 2963 } 2964 2965 return 0; 2966 } 2967 2968 /** 2969 * ice_write_40b_phy_reg_e82x - Write a 40b value to the PHY 2970 * @hw: pointer to the HW struct 2971 * @port: port to write to 2972 * @low_addr: offset of the low register 2973 * @val: 40b value to write 2974 * 2975 * Write the provided 40b value to the two associated registers by splitting 2976 * it up into two chunks, the lower 8 bits and the upper 32 bits. 2977 */ 2978 static int 2979 ice_write_40b_phy_reg_e82x(struct ice_hw *hw, u8 port, u16 low_addr, u64 val) 2980 { 2981 u32 low, high; 2982 u16 high_addr; 2983 int err; 2984 2985 /* Only operate on registers known to be split into a lower 8 bit 2986 * register and an upper 32 bit register. 2987 */ 2988 if (!ice_is_40b_phy_reg_e82x(low_addr, &high_addr)) { 2989 ice_debug(hw, ICE_DBG_PTP, "Invalid 40b register addr 0x%08x\n", 2990 low_addr); 2991 return -EINVAL; 2992 } 2993 low = FIELD_GET(P_REG_40B_LOW_M, val); 2994 high = (u32)(val >> P_REG_40B_HIGH_S); 2995 2996 err = ice_write_phy_reg_e82x(hw, port, low_addr, low); 2997 if (err) { 2998 ice_debug(hw, ICE_DBG_PTP, "Failed to write to low register 0x%08x\n, err %d", 2999 low_addr, err); 3000 return err; 3001 } 3002 3003 err = ice_write_phy_reg_e82x(hw, port, high_addr, high); 3004 if (err) { 3005 ice_debug(hw, ICE_DBG_PTP, "Failed to write to high register 0x%08x\n, err %d", 3006 high_addr, err); 3007 return err; 3008 } 3009 3010 return 0; 3011 } 3012 3013 /** 3014 * ice_write_64b_phy_reg_e82x - Write a 64bit value to PHY registers 3015 * @hw: pointer to the HW struct 3016 * @port: PHY port to read from 3017 * @low_addr: offset of the lower register to read from 3018 * @val: the contents of the 64bit value to write to PHY 3019 * 3020 * Write the 64bit value to the two associated 32bit PHY registers. The offset 3021 * is always specified as the lower register, and the high address is looked 3022 * up. This function only operates on registers known to be two parts of 3023 * a 64bit value. 3024 */ 3025 static int 3026 ice_write_64b_phy_reg_e82x(struct ice_hw *hw, u8 port, u16 low_addr, u64 val) 3027 { 3028 u32 low, high; 3029 u16 high_addr; 3030 int err; 3031 3032 /* Only operate on registers known to be split into two 32bit 3033 * registers. 3034 */ 3035 if (!ice_is_64b_phy_reg_e82x(low_addr, &high_addr)) { 3036 ice_debug(hw, ICE_DBG_PTP, "Invalid 64b register addr 0x%08x\n", 3037 low_addr); 3038 return -EINVAL; 3039 } 3040 3041 low = lower_32_bits(val); 3042 high = upper_32_bits(val); 3043 3044 err = ice_write_phy_reg_e82x(hw, port, low_addr, low); 3045 if (err) { 3046 ice_debug(hw, ICE_DBG_PTP, "Failed to write to low register 0x%08x\n, err %d", 3047 low_addr, err); 3048 return err; 3049 } 3050 3051 err = ice_write_phy_reg_e82x(hw, port, high_addr, high); 3052 if (err) { 3053 ice_debug(hw, ICE_DBG_PTP, "Failed to write to high register 0x%08x\n, err %d", 3054 high_addr, err); 3055 return err; 3056 } 3057 3058 return 0; 3059 } 3060 3061 /** 3062 * ice_fill_quad_msg_e82x - Fill message data for quad register access 3063 * @hw: pointer to the HW struct 3064 * @msg: the PHY message buffer to fill in 3065 * @quad: the quad to access 3066 * @offset: the register offset 3067 * 3068 * Fill a message buffer for accessing a register in a quad shared between 3069 * multiple PHYs. 3070 * 3071 * Return: 3072 * * %0 - OK 3073 * * %-EINVAL - invalid quad number 3074 */ 3075 static int ice_fill_quad_msg_e82x(struct ice_hw *hw, 3076 struct ice_sbq_msg_input *msg, u8 quad, 3077 u16 offset) 3078 { 3079 u32 addr; 3080 3081 if (quad >= ICE_GET_QUAD_NUM(hw->ptp.num_lports)) 3082 return -EINVAL; 3083 3084 msg->dest_dev = rmn_0; 3085 3086 if (!(quad % ICE_GET_QUAD_NUM(hw->ptp.ports_per_phy))) 3087 addr = Q_0_BASE + offset; 3088 else 3089 addr = Q_1_BASE + offset; 3090 3091 msg->msg_addr_low = lower_16_bits(addr); 3092 msg->msg_addr_high = upper_16_bits(addr); 3093 3094 return 0; 3095 } 3096 3097 /** 3098 * ice_read_quad_reg_e82x - Read a PHY quad register 3099 * @hw: pointer to the HW struct 3100 * @quad: quad to read from 3101 * @offset: quad register offset to read 3102 * @val: on return, the contents read from the quad 3103 * 3104 * Read a quad register over the device sideband queue. Quad registers are 3105 * shared between multiple PHYs. 3106 */ 3107 int 3108 ice_read_quad_reg_e82x(struct ice_hw *hw, u8 quad, u16 offset, u32 *val) 3109 { 3110 struct ice_sbq_msg_input msg = {0}; 3111 int err; 3112 3113 err = ice_fill_quad_msg_e82x(hw, &msg, quad, offset); 3114 if (err) 3115 return err; 3116 3117 msg.opcode = ice_sbq_msg_rd; 3118 3119 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 3120 if (err) { 3121 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 3122 err); 3123 return err; 3124 } 3125 3126 *val = msg.data; 3127 3128 return 0; 3129 } 3130 3131 /** 3132 * ice_write_quad_reg_e82x - Write a PHY quad register 3133 * @hw: pointer to the HW struct 3134 * @quad: quad to write to 3135 * @offset: quad register offset to write 3136 * @val: The value to write to the register 3137 * 3138 * Write a quad register over the device sideband queue. Quad registers are 3139 * shared between multiple PHYs. 3140 */ 3141 int 3142 ice_write_quad_reg_e82x(struct ice_hw *hw, u8 quad, u16 offset, u32 val) 3143 { 3144 struct ice_sbq_msg_input msg = {0}; 3145 int err; 3146 3147 err = ice_fill_quad_msg_e82x(hw, &msg, quad, offset); 3148 if (err) 3149 return err; 3150 3151 msg.opcode = ice_sbq_msg_wr; 3152 msg.data = val; 3153 3154 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 3155 if (err) { 3156 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 3157 err); 3158 return err; 3159 } 3160 3161 return 0; 3162 } 3163 3164 /** 3165 * ice_read_phy_tstamp_e82x - Read a PHY timestamp out of the quad block 3166 * @hw: pointer to the HW struct 3167 * @quad: the quad to read from 3168 * @idx: the timestamp index to read 3169 * @tstamp: on return, the 40bit timestamp value 3170 * 3171 * Read a 40bit timestamp value out of the two associated registers in the 3172 * quad memory block that is shared between the internal PHYs of the E822 3173 * family of devices. 3174 */ 3175 static int 3176 ice_read_phy_tstamp_e82x(struct ice_hw *hw, u8 quad, u8 idx, u64 *tstamp) 3177 { 3178 u16 lo_addr, hi_addr; 3179 u32 lo, hi; 3180 int err; 3181 3182 lo_addr = (u16)TS_L(Q_REG_TX_MEMORY_BANK_START, idx); 3183 hi_addr = (u16)TS_H(Q_REG_TX_MEMORY_BANK_START, idx); 3184 3185 err = ice_read_quad_reg_e82x(hw, quad, lo_addr, &lo); 3186 if (err) { 3187 ice_debug(hw, ICE_DBG_PTP, "Failed to read low PTP timestamp register, err %d\n", 3188 err); 3189 return err; 3190 } 3191 3192 err = ice_read_quad_reg_e82x(hw, quad, hi_addr, &hi); 3193 if (err) { 3194 ice_debug(hw, ICE_DBG_PTP, "Failed to read high PTP timestamp register, err %d\n", 3195 err); 3196 return err; 3197 } 3198 3199 /* For E822 based internal PHYs, the timestamp is reported with the 3200 * lower 8 bits in the low register, and the upper 32 bits in the high 3201 * register. 3202 */ 3203 *tstamp = FIELD_PREP(TS_PHY_HIGH_M, hi) | FIELD_PREP(TS_PHY_LOW_M, lo); 3204 3205 return 0; 3206 } 3207 3208 /** 3209 * ice_clear_phy_tstamp_e82x - Clear a timestamp from the quad block 3210 * @hw: pointer to the HW struct 3211 * @quad: the quad to read from 3212 * @idx: the timestamp index to reset 3213 * 3214 * Read the timestamp out of the quad to clear its timestamp status bit from 3215 * the PHY quad block that is shared between the internal PHYs of the E822 3216 * devices. 3217 * 3218 * Note that unlike E810, software cannot directly write to the quad memory 3219 * bank registers. E822 relies on the ice_get_phy_tx_tstamp_ready() function 3220 * to determine which timestamps are valid. Reading a timestamp auto-clears 3221 * the valid bit. 3222 * 3223 * To directly clear the contents of the timestamp block entirely, discarding 3224 * all timestamp data at once, software should instead use 3225 * ice_ptp_reset_ts_memory_quad_e82x(). 3226 * 3227 * This function should only be called on an idx whose bit is set according to 3228 * ice_get_phy_tx_tstamp_ready(). 3229 */ 3230 static int 3231 ice_clear_phy_tstamp_e82x(struct ice_hw *hw, u8 quad, u8 idx) 3232 { 3233 u64 unused_tstamp; 3234 int err; 3235 3236 err = ice_read_phy_tstamp_e82x(hw, quad, idx, &unused_tstamp); 3237 if (err) { 3238 ice_debug(hw, ICE_DBG_PTP, "Failed to read the timestamp register for quad %u, idx %u, err %d\n", 3239 quad, idx, err); 3240 return err; 3241 } 3242 3243 return 0; 3244 } 3245 3246 /** 3247 * ice_ptp_reset_ts_memory_quad_e82x - Clear all timestamps from the quad block 3248 * @hw: pointer to the HW struct 3249 * @quad: the quad to read from 3250 * 3251 * Clear all timestamps from the PHY quad block that is shared between the 3252 * internal PHYs on the E822 devices. 3253 */ 3254 void ice_ptp_reset_ts_memory_quad_e82x(struct ice_hw *hw, u8 quad) 3255 { 3256 ice_write_quad_reg_e82x(hw, quad, Q_REG_TS_CTRL, Q_REG_TS_CTRL_M); 3257 ice_write_quad_reg_e82x(hw, quad, Q_REG_TS_CTRL, ~(u32)Q_REG_TS_CTRL_M); 3258 } 3259 3260 /** 3261 * ice_ptp_reset_ts_memory_e82x - Clear all timestamps from all quad blocks 3262 * @hw: pointer to the HW struct 3263 */ 3264 static void ice_ptp_reset_ts_memory_e82x(struct ice_hw *hw) 3265 { 3266 unsigned int quad; 3267 3268 for (quad = 0; quad < ICE_GET_QUAD_NUM(hw->ptp.num_lports); quad++) 3269 ice_ptp_reset_ts_memory_quad_e82x(hw, quad); 3270 } 3271 3272 /** 3273 * ice_ptp_set_vernier_wl - Set the window length for vernier calibration 3274 * @hw: pointer to the HW struct 3275 * 3276 * Set the window length used for the vernier port calibration process. 3277 */ 3278 static int ice_ptp_set_vernier_wl(struct ice_hw *hw) 3279 { 3280 u8 port; 3281 3282 for (port = 0; port < hw->ptp.num_lports; port++) { 3283 int err; 3284 3285 err = ice_write_phy_reg_e82x(hw, port, P_REG_WL, 3286 PTP_VERNIER_WL); 3287 if (err) { 3288 ice_debug(hw, ICE_DBG_PTP, "Failed to set vernier window length for port %u, err %d\n", 3289 port, err); 3290 return err; 3291 } 3292 } 3293 3294 return 0; 3295 } 3296 3297 /** 3298 * ice_ptp_init_phc_e82x - Perform E822 specific PHC initialization 3299 * @hw: pointer to HW struct 3300 * 3301 * Perform PHC initialization steps specific to E822 devices. 3302 */ 3303 static int ice_ptp_init_phc_e82x(struct ice_hw *hw) 3304 { 3305 int err; 3306 u32 val; 3307 3308 /* Enable reading switch and PHY registers over the sideband queue */ 3309 #define PF_SB_REM_DEV_CTL_SWITCH_READ BIT(1) 3310 #define PF_SB_REM_DEV_CTL_PHY0 BIT(2) 3311 val = rd32(hw, PF_SB_REM_DEV_CTL); 3312 val |= (PF_SB_REM_DEV_CTL_SWITCH_READ | PF_SB_REM_DEV_CTL_PHY0); 3313 wr32(hw, PF_SB_REM_DEV_CTL, val); 3314 3315 /* Initialize the Clock Generation Unit */ 3316 err = ice_init_cgu_e82x(hw); 3317 if (err) 3318 return err; 3319 3320 /* Set window length for all the ports */ 3321 return ice_ptp_set_vernier_wl(hw); 3322 } 3323 3324 /** 3325 * ice_ptp_prep_phy_time_e82x - Prepare PHY port with initial time 3326 * @hw: pointer to the HW struct 3327 * @time: Time to initialize the PHY port clocks to 3328 * 3329 * Program the PHY port registers with a new initial time value. The port 3330 * clock will be initialized once the driver issues an ICE_PTP_INIT_TIME sync 3331 * command. The time value is the upper 32 bits of the PHY timer, usually in 3332 * units of nominal nanoseconds. 3333 */ 3334 static int 3335 ice_ptp_prep_phy_time_e82x(struct ice_hw *hw, u32 time) 3336 { 3337 u64 phy_time; 3338 u8 port; 3339 int err; 3340 3341 /* The time represents the upper 32 bits of the PHY timer, so we need 3342 * to shift to account for this when programming. 3343 */ 3344 phy_time = (u64)time << 32; 3345 3346 for (port = 0; port < hw->ptp.num_lports; port++) { 3347 /* Tx case */ 3348 err = ice_write_64b_phy_reg_e82x(hw, port, 3349 P_REG_TX_TIMER_INC_PRE_L, 3350 phy_time); 3351 if (err) 3352 goto exit_err; 3353 3354 /* Rx case */ 3355 err = ice_write_64b_phy_reg_e82x(hw, port, 3356 P_REG_RX_TIMER_INC_PRE_L, 3357 phy_time); 3358 if (err) 3359 goto exit_err; 3360 } 3361 3362 return 0; 3363 3364 exit_err: 3365 ice_debug(hw, ICE_DBG_PTP, "Failed to write init time for port %u, err %d\n", 3366 port, err); 3367 3368 return err; 3369 } 3370 3371 /** 3372 * ice_ptp_prep_port_adj_e82x - Prepare a single port for time adjust 3373 * @hw: pointer to HW struct 3374 * @port: Port number to be programmed 3375 * @time: time in cycles to adjust the port Tx and Rx clocks 3376 * 3377 * Program the port for an atomic adjustment by writing the Tx and Rx timer 3378 * registers. The atomic adjustment won't be completed until the driver issues 3379 * an ICE_PTP_ADJ_TIME command. 3380 * 3381 * Note that time is not in units of nanoseconds. It is in clock time 3382 * including the lower sub-nanosecond portion of the port timer. 3383 * 3384 * Negative adjustments are supported using 2s complement arithmetic. 3385 */ 3386 static int 3387 ice_ptp_prep_port_adj_e82x(struct ice_hw *hw, u8 port, s64 time) 3388 { 3389 u32 l_time, u_time; 3390 int err; 3391 3392 l_time = lower_32_bits(time); 3393 u_time = upper_32_bits(time); 3394 3395 /* Tx case */ 3396 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_TIMER_INC_PRE_L, 3397 l_time); 3398 if (err) 3399 goto exit_err; 3400 3401 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_TIMER_INC_PRE_U, 3402 u_time); 3403 if (err) 3404 goto exit_err; 3405 3406 /* Rx case */ 3407 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_TIMER_INC_PRE_L, 3408 l_time); 3409 if (err) 3410 goto exit_err; 3411 3412 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_TIMER_INC_PRE_U, 3413 u_time); 3414 if (err) 3415 goto exit_err; 3416 3417 return 0; 3418 3419 exit_err: 3420 ice_debug(hw, ICE_DBG_PTP, "Failed to write time adjust for port %u, err %d\n", 3421 port, err); 3422 return err; 3423 } 3424 3425 /** 3426 * ice_ptp_prep_phy_adj_e82x - Prep PHY ports for a time adjustment 3427 * @hw: pointer to HW struct 3428 * @adj: adjustment in nanoseconds 3429 * 3430 * Prepare the PHY ports for an atomic time adjustment by programming the PHY 3431 * Tx and Rx port registers. The actual adjustment is completed by issuing an 3432 * ICE_PTP_ADJ_TIME or ICE_PTP_ADJ_TIME_AT_TIME sync command. 3433 */ 3434 static int 3435 ice_ptp_prep_phy_adj_e82x(struct ice_hw *hw, s32 adj) 3436 { 3437 s64 cycles; 3438 u8 port; 3439 3440 /* The port clock supports adjustment of the sub-nanosecond portion of 3441 * the clock. We shift the provided adjustment in nanoseconds to 3442 * calculate the appropriate adjustment to program into the PHY ports. 3443 */ 3444 if (adj > 0) 3445 cycles = (s64)adj << 32; 3446 else 3447 cycles = -(((s64)-adj) << 32); 3448 3449 for (port = 0; port < hw->ptp.num_lports; port++) { 3450 int err; 3451 3452 err = ice_ptp_prep_port_adj_e82x(hw, port, cycles); 3453 if (err) 3454 return err; 3455 } 3456 3457 return 0; 3458 } 3459 3460 /** 3461 * ice_ptp_prep_phy_incval_e82x - Prepare PHY ports for time adjustment 3462 * @hw: pointer to HW struct 3463 * @incval: new increment value to prepare 3464 * 3465 * Prepare each of the PHY ports for a new increment value by programming the 3466 * port's TIMETUS registers. The new increment value will be updated after 3467 * issuing an ICE_PTP_INIT_INCVAL command. 3468 */ 3469 static int 3470 ice_ptp_prep_phy_incval_e82x(struct ice_hw *hw, u64 incval) 3471 { 3472 int err; 3473 u8 port; 3474 3475 for (port = 0; port < hw->ptp.num_lports; port++) { 3476 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_TIMETUS_L, 3477 incval); 3478 if (err) 3479 goto exit_err; 3480 } 3481 3482 return 0; 3483 3484 exit_err: 3485 ice_debug(hw, ICE_DBG_PTP, "Failed to write incval for port %u, err %d\n", 3486 port, err); 3487 3488 return err; 3489 } 3490 3491 /** 3492 * ice_ptp_read_port_capture - Read a port's local time capture 3493 * @hw: pointer to HW struct 3494 * @port: Port number to read 3495 * @tx_ts: on return, the Tx port time capture 3496 * @rx_ts: on return, the Rx port time capture 3497 * 3498 * Read the port's Tx and Rx local time capture values. 3499 * 3500 * Note this has no equivalent for the E810 devices. 3501 */ 3502 static int 3503 ice_ptp_read_port_capture(struct ice_hw *hw, u8 port, u64 *tx_ts, u64 *rx_ts) 3504 { 3505 int err; 3506 3507 /* Tx case */ 3508 err = ice_read_64b_phy_reg_e82x(hw, port, P_REG_TX_CAPTURE_L, tx_ts); 3509 if (err) { 3510 ice_debug(hw, ICE_DBG_PTP, "Failed to read REG_TX_CAPTURE, err %d\n", 3511 err); 3512 return err; 3513 } 3514 3515 ice_debug(hw, ICE_DBG_PTP, "tx_init = 0x%016llx\n", 3516 (unsigned long long)*tx_ts); 3517 3518 /* Rx case */ 3519 err = ice_read_64b_phy_reg_e82x(hw, port, P_REG_RX_CAPTURE_L, rx_ts); 3520 if (err) { 3521 ice_debug(hw, ICE_DBG_PTP, "Failed to read RX_CAPTURE, err %d\n", 3522 err); 3523 return err; 3524 } 3525 3526 ice_debug(hw, ICE_DBG_PTP, "rx_init = 0x%016llx\n", 3527 (unsigned long long)*rx_ts); 3528 3529 return 0; 3530 } 3531 3532 /** 3533 * ice_ptp_write_port_cmd_e82x - Prepare a single PHY port for a timer command 3534 * @hw: pointer to HW struct 3535 * @port: Port to which cmd has to be sent 3536 * @cmd: Command to be sent to the port 3537 * 3538 * Prepare the requested port for an upcoming timer sync command. 3539 * 3540 * Note there is no equivalent of this operation on E810, as that device 3541 * always handles all external PHYs internally. 3542 * 3543 * Return: 3544 * * %0 - success 3545 * * %other - failed to write to PHY 3546 */ 3547 static int ice_ptp_write_port_cmd_e82x(struct ice_hw *hw, u8 port, 3548 enum ice_ptp_tmr_cmd cmd) 3549 { 3550 u32 val = ice_ptp_tmr_cmd_to_port_reg(hw, cmd); 3551 int err; 3552 3553 /* Tx case */ 3554 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_TMR_CMD, val); 3555 if (err) { 3556 ice_debug(hw, ICE_DBG_PTP, "Failed to write back TX_TMR_CMD, err %d\n", 3557 err); 3558 return err; 3559 } 3560 3561 /* Rx case */ 3562 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_TMR_CMD, 3563 val | TS_CMD_RX_TYPE); 3564 if (err) { 3565 ice_debug(hw, ICE_DBG_PTP, "Failed to write back RX_TMR_CMD, err %d\n", 3566 err); 3567 return err; 3568 } 3569 3570 return 0; 3571 } 3572 3573 /* E822 Vernier calibration functions 3574 * 3575 * The following functions are used as part of the vernier calibration of 3576 * a port. This calibration increases the precision of the timestamps on the 3577 * port. 3578 */ 3579 3580 /** 3581 * ice_phy_get_speed_and_fec_e82x - Get link speed and FEC based on serdes mode 3582 * @hw: pointer to HW struct 3583 * @port: the port to read from 3584 * @link_out: if non-NULL, holds link speed on success 3585 * @fec_out: if non-NULL, holds FEC algorithm on success 3586 * 3587 * Read the serdes data for the PHY port and extract the link speed and FEC 3588 * algorithm. 3589 */ 3590 static int 3591 ice_phy_get_speed_and_fec_e82x(struct ice_hw *hw, u8 port, 3592 enum ice_ptp_link_spd *link_out, 3593 enum ice_ptp_fec_mode *fec_out) 3594 { 3595 enum ice_ptp_link_spd link; 3596 enum ice_ptp_fec_mode fec; 3597 u32 serdes; 3598 int err; 3599 3600 err = ice_read_phy_reg_e82x(hw, port, P_REG_LINK_SPEED, &serdes); 3601 if (err) { 3602 ice_debug(hw, ICE_DBG_PTP, "Failed to read serdes info\n"); 3603 return err; 3604 } 3605 3606 /* Determine the FEC algorithm */ 3607 fec = (enum ice_ptp_fec_mode)P_REG_LINK_SPEED_FEC_MODE(serdes); 3608 3609 serdes &= P_REG_LINK_SPEED_SERDES_M; 3610 3611 /* Determine the link speed */ 3612 if (fec == ICE_PTP_FEC_MODE_RS_FEC) { 3613 switch (serdes) { 3614 case ICE_PTP_SERDES_25G: 3615 link = ICE_PTP_LNK_SPD_25G_RS; 3616 break; 3617 case ICE_PTP_SERDES_50G: 3618 link = ICE_PTP_LNK_SPD_50G_RS; 3619 break; 3620 case ICE_PTP_SERDES_100G: 3621 link = ICE_PTP_LNK_SPD_100G_RS; 3622 break; 3623 default: 3624 return -EIO; 3625 } 3626 } else { 3627 switch (serdes) { 3628 case ICE_PTP_SERDES_1G: 3629 link = ICE_PTP_LNK_SPD_1G; 3630 break; 3631 case ICE_PTP_SERDES_10G: 3632 link = ICE_PTP_LNK_SPD_10G; 3633 break; 3634 case ICE_PTP_SERDES_25G: 3635 link = ICE_PTP_LNK_SPD_25G; 3636 break; 3637 case ICE_PTP_SERDES_40G: 3638 link = ICE_PTP_LNK_SPD_40G; 3639 break; 3640 case ICE_PTP_SERDES_50G: 3641 link = ICE_PTP_LNK_SPD_50G; 3642 break; 3643 default: 3644 return -EIO; 3645 } 3646 } 3647 3648 if (link_out) 3649 *link_out = link; 3650 if (fec_out) 3651 *fec_out = fec; 3652 3653 return 0; 3654 } 3655 3656 /** 3657 * ice_phy_cfg_lane_e82x - Configure PHY quad for single/multi-lane timestamp 3658 * @hw: pointer to HW struct 3659 * @port: to configure the quad for 3660 */ 3661 static void ice_phy_cfg_lane_e82x(struct ice_hw *hw, u8 port) 3662 { 3663 enum ice_ptp_link_spd link_spd; 3664 int err; 3665 u32 val; 3666 u8 quad; 3667 3668 err = ice_phy_get_speed_and_fec_e82x(hw, port, &link_spd, NULL); 3669 if (err) { 3670 ice_debug(hw, ICE_DBG_PTP, "Failed to get PHY link speed, err %d\n", 3671 err); 3672 return; 3673 } 3674 3675 quad = ICE_GET_QUAD_NUM(port); 3676 3677 err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, &val); 3678 if (err) { 3679 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_MEM_GLB_CFG, err %d\n", 3680 err); 3681 return; 3682 } 3683 3684 if (link_spd >= ICE_PTP_LNK_SPD_40G) 3685 val &= ~Q_REG_TX_MEM_GBL_CFG_LANE_TYPE_M; 3686 else 3687 val |= Q_REG_TX_MEM_GBL_CFG_LANE_TYPE_M; 3688 3689 err = ice_write_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, val); 3690 if (err) { 3691 ice_debug(hw, ICE_DBG_PTP, "Failed to write back TX_MEM_GBL_CFG, err %d\n", 3692 err); 3693 return; 3694 } 3695 } 3696 3697 /** 3698 * ice_phy_cfg_uix_e82x - Configure Serdes UI to TU conversion for E822 3699 * @hw: pointer to the HW structure 3700 * @port: the port to configure 3701 * 3702 * Program the conversion ration of Serdes clock "unit intervals" (UIs) to PHC 3703 * hardware clock time units (TUs). That is, determine the number of TUs per 3704 * serdes unit interval, and program the UIX registers with this conversion. 3705 * 3706 * This conversion is used as part of the calibration process when determining 3707 * the additional error of a timestamp vs the real time of transmission or 3708 * receipt of the packet. 3709 * 3710 * Hardware uses the number of TUs per 66 UIs, written to the UIX registers 3711 * for the two main serdes clock rates, 10G/40G and 25G/100G serdes clocks. 3712 * 3713 * To calculate the conversion ratio, we use the following facts: 3714 * 3715 * a) the clock frequency in Hz (cycles per second) 3716 * b) the number of TUs per cycle (the increment value of the clock) 3717 * c) 1 second per 1 billion nanoseconds 3718 * d) the duration of 66 UIs in nanoseconds 3719 * 3720 * Given these facts, we can use the following table to work out what ratios 3721 * to multiply in order to get the number of TUs per 66 UIs: 3722 * 3723 * cycles | 1 second | incval (TUs) | nanoseconds 3724 * -------+--------------+--------------+------------- 3725 * second | 1 billion ns | cycle | 66 UIs 3726 * 3727 * To perform the multiplication using integers without too much loss of 3728 * precision, we can take use the following equation: 3729 * 3730 * (freq * incval * 6600 LINE_UI ) / ( 100 * 1 billion) 3731 * 3732 * We scale up to using 6600 UI instead of 66 in order to avoid fractional 3733 * nanosecond UIs (66 UI at 10G/40G is 6.4 ns) 3734 * 3735 * The increment value has a maximum expected range of about 34 bits, while 3736 * the frequency value is about 29 bits. Multiplying these values shouldn't 3737 * overflow the 64 bits. However, we must then further multiply them again by 3738 * the Serdes unit interval duration. To avoid overflow here, we split the 3739 * overall divide by 1e11 into a divide by 256 (shift down by 8 bits) and 3740 * a divide by 390,625,000. This does lose some precision, but avoids 3741 * miscalculation due to arithmetic overflow. 3742 */ 3743 static int ice_phy_cfg_uix_e82x(struct ice_hw *hw, u8 port) 3744 { 3745 u64 cur_freq, clk_incval, tu_per_sec, uix; 3746 int err; 3747 3748 cur_freq = ice_e82x_pll_freq(ice_e82x_time_ref(hw)); 3749 clk_incval = ice_ptp_read_src_incval(hw); 3750 3751 /* Calculate TUs per second divided by 256 */ 3752 tu_per_sec = (cur_freq * clk_incval) >> 8; 3753 3754 #define LINE_UI_10G_40G 640 /* 6600 UIs is 640 nanoseconds at 10Gb/40Gb */ 3755 #define LINE_UI_25G_100G 256 /* 6600 UIs is 256 nanoseconds at 25Gb/100Gb */ 3756 3757 /* Program the 10Gb/40Gb conversion ratio */ 3758 uix = div_u64(tu_per_sec * LINE_UI_10G_40G, 390625000); 3759 3760 err = ice_write_64b_phy_reg_e82x(hw, port, P_REG_UIX66_10G_40G_L, 3761 uix); 3762 if (err) { 3763 ice_debug(hw, ICE_DBG_PTP, "Failed to write UIX66_10G_40G, err %d\n", 3764 err); 3765 return err; 3766 } 3767 3768 /* Program the 25Gb/100Gb conversion ratio */ 3769 uix = div_u64(tu_per_sec * LINE_UI_25G_100G, 390625000); 3770 3771 err = ice_write_64b_phy_reg_e82x(hw, port, P_REG_UIX66_25G_100G_L, 3772 uix); 3773 if (err) { 3774 ice_debug(hw, ICE_DBG_PTP, "Failed to write UIX66_25G_100G, err %d\n", 3775 err); 3776 return err; 3777 } 3778 3779 return 0; 3780 } 3781 3782 /** 3783 * ice_phy_cfg_parpcs_e82x - Configure TUs per PAR/PCS clock cycle 3784 * @hw: pointer to the HW struct 3785 * @port: port to configure 3786 * 3787 * Configure the number of TUs for the PAR and PCS clocks used as part of the 3788 * timestamp calibration process. This depends on the link speed, as the PHY 3789 * uses different markers depending on the speed. 3790 * 3791 * 1Gb/10Gb/25Gb: 3792 * - Tx/Rx PAR/PCS markers 3793 * 3794 * 25Gb RS: 3795 * - Tx/Rx Reed Solomon gearbox PAR/PCS markers 3796 * 3797 * 40Gb/50Gb: 3798 * - Tx/Rx PAR/PCS markers 3799 * - Rx Deskew PAR/PCS markers 3800 * 3801 * 50G RS and 100GB RS: 3802 * - Tx/Rx Reed Solomon gearbox PAR/PCS markers 3803 * - Rx Deskew PAR/PCS markers 3804 * - Tx PAR/PCS markers 3805 * 3806 * To calculate the conversion, we use the PHC clock frequency (cycles per 3807 * second), the increment value (TUs per cycle), and the related PHY clock 3808 * frequency to calculate the TUs per unit of the PHY link clock. The 3809 * following table shows how the units convert: 3810 * 3811 * cycles | TUs | second 3812 * -------+-------+-------- 3813 * second | cycle | cycles 3814 * 3815 * For each conversion register, look up the appropriate frequency from the 3816 * e822 PAR/PCS table and calculate the TUs per unit of that clock. Program 3817 * this to the appropriate register, preparing hardware to perform timestamp 3818 * calibration to calculate the total Tx or Rx offset to adjust the timestamp 3819 * in order to calibrate for the internal PHY delays. 3820 * 3821 * Note that the increment value ranges up to ~34 bits, and the clock 3822 * frequency is ~29 bits, so multiplying them together should fit within the 3823 * 64 bit arithmetic. 3824 */ 3825 static int ice_phy_cfg_parpcs_e82x(struct ice_hw *hw, u8 port) 3826 { 3827 u64 cur_freq, clk_incval, tu_per_sec, phy_tus; 3828 enum ice_ptp_link_spd link_spd; 3829 enum ice_ptp_fec_mode fec_mode; 3830 int err; 3831 3832 err = ice_phy_get_speed_and_fec_e82x(hw, port, &link_spd, &fec_mode); 3833 if (err) 3834 return err; 3835 3836 cur_freq = ice_e82x_pll_freq(ice_e82x_time_ref(hw)); 3837 clk_incval = ice_ptp_read_src_incval(hw); 3838 3839 /* Calculate TUs per cycle of the PHC clock */ 3840 tu_per_sec = cur_freq * clk_incval; 3841 3842 /* For each PHY conversion register, look up the appropriate link 3843 * speed frequency and determine the TUs per that clock's cycle time. 3844 * Split this into a high and low value and then program the 3845 * appropriate register. If that link speed does not use the 3846 * associated register, write zeros to clear it instead. 3847 */ 3848 3849 /* P_REG_PAR_TX_TUS */ 3850 if (e822_vernier[link_spd].tx_par_clk) 3851 phy_tus = div_u64(tu_per_sec, 3852 e822_vernier[link_spd].tx_par_clk); 3853 else 3854 phy_tus = 0; 3855 3856 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_PAR_TX_TUS_L, 3857 phy_tus); 3858 if (err) 3859 return err; 3860 3861 /* P_REG_PAR_RX_TUS */ 3862 if (e822_vernier[link_spd].rx_par_clk) 3863 phy_tus = div_u64(tu_per_sec, 3864 e822_vernier[link_spd].rx_par_clk); 3865 else 3866 phy_tus = 0; 3867 3868 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_PAR_RX_TUS_L, 3869 phy_tus); 3870 if (err) 3871 return err; 3872 3873 /* P_REG_PCS_TX_TUS */ 3874 if (e822_vernier[link_spd].tx_pcs_clk) 3875 phy_tus = div_u64(tu_per_sec, 3876 e822_vernier[link_spd].tx_pcs_clk); 3877 else 3878 phy_tus = 0; 3879 3880 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_PCS_TX_TUS_L, 3881 phy_tus); 3882 if (err) 3883 return err; 3884 3885 /* P_REG_PCS_RX_TUS */ 3886 if (e822_vernier[link_spd].rx_pcs_clk) 3887 phy_tus = div_u64(tu_per_sec, 3888 e822_vernier[link_spd].rx_pcs_clk); 3889 else 3890 phy_tus = 0; 3891 3892 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_PCS_RX_TUS_L, 3893 phy_tus); 3894 if (err) 3895 return err; 3896 3897 /* P_REG_DESK_PAR_TX_TUS */ 3898 if (e822_vernier[link_spd].tx_desk_rsgb_par) 3899 phy_tus = div_u64(tu_per_sec, 3900 e822_vernier[link_spd].tx_desk_rsgb_par); 3901 else 3902 phy_tus = 0; 3903 3904 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_DESK_PAR_TX_TUS_L, 3905 phy_tus); 3906 if (err) 3907 return err; 3908 3909 /* P_REG_DESK_PAR_RX_TUS */ 3910 if (e822_vernier[link_spd].rx_desk_rsgb_par) 3911 phy_tus = div_u64(tu_per_sec, 3912 e822_vernier[link_spd].rx_desk_rsgb_par); 3913 else 3914 phy_tus = 0; 3915 3916 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_DESK_PAR_RX_TUS_L, 3917 phy_tus); 3918 if (err) 3919 return err; 3920 3921 /* P_REG_DESK_PCS_TX_TUS */ 3922 if (e822_vernier[link_spd].tx_desk_rsgb_pcs) 3923 phy_tus = div_u64(tu_per_sec, 3924 e822_vernier[link_spd].tx_desk_rsgb_pcs); 3925 else 3926 phy_tus = 0; 3927 3928 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_DESK_PCS_TX_TUS_L, 3929 phy_tus); 3930 if (err) 3931 return err; 3932 3933 /* P_REG_DESK_PCS_RX_TUS */ 3934 if (e822_vernier[link_spd].rx_desk_rsgb_pcs) 3935 phy_tus = div_u64(tu_per_sec, 3936 e822_vernier[link_spd].rx_desk_rsgb_pcs); 3937 else 3938 phy_tus = 0; 3939 3940 return ice_write_40b_phy_reg_e82x(hw, port, P_REG_DESK_PCS_RX_TUS_L, 3941 phy_tus); 3942 } 3943 3944 /** 3945 * ice_calc_fixed_tx_offset_e82x - Calculated Fixed Tx offset for a port 3946 * @hw: pointer to the HW struct 3947 * @link_spd: the Link speed to calculate for 3948 * 3949 * Calculate the fixed offset due to known static latency data. 3950 */ 3951 static u64 3952 ice_calc_fixed_tx_offset_e82x(struct ice_hw *hw, enum ice_ptp_link_spd link_spd) 3953 { 3954 u64 cur_freq, clk_incval, tu_per_sec, fixed_offset; 3955 3956 cur_freq = ice_e82x_pll_freq(ice_e82x_time_ref(hw)); 3957 clk_incval = ice_ptp_read_src_incval(hw); 3958 3959 /* Calculate TUs per second */ 3960 tu_per_sec = cur_freq * clk_incval; 3961 3962 /* Calculate number of TUs to add for the fixed Tx latency. Since the 3963 * latency measurement is in 1/100th of a nanosecond, we need to 3964 * multiply by tu_per_sec and then divide by 1e11. This calculation 3965 * overflows 64 bit integer arithmetic, so break it up into two 3966 * divisions by 1e4 first then by 1e7. 3967 */ 3968 fixed_offset = div_u64(tu_per_sec, 10000); 3969 fixed_offset *= e822_vernier[link_spd].tx_fixed_delay; 3970 fixed_offset = div_u64(fixed_offset, 10000000); 3971 3972 return fixed_offset; 3973 } 3974 3975 /** 3976 * ice_phy_cfg_tx_offset_e82x - Configure total Tx timestamp offset 3977 * @hw: pointer to the HW struct 3978 * @port: the PHY port to configure 3979 * 3980 * Program the P_REG_TOTAL_TX_OFFSET register with the total number of TUs to 3981 * adjust Tx timestamps by. This is calculated by combining some known static 3982 * latency along with the Vernier offset computations done by hardware. 3983 * 3984 * This function will not return successfully until the Tx offset calculations 3985 * have been completed, which requires waiting until at least one packet has 3986 * been transmitted by the device. It is safe to call this function 3987 * periodically until calibration succeeds, as it will only program the offset 3988 * once. 3989 * 3990 * To avoid overflow, when calculating the offset based on the known static 3991 * latency values, we use measurements in 1/100th of a nanosecond, and divide 3992 * the TUs per second up front. This avoids overflow while allowing 3993 * calculation of the adjustment using integer arithmetic. 3994 * 3995 * Returns zero on success, -EBUSY if the hardware vernier offset 3996 * calibration has not completed, or another error code on failure. 3997 */ 3998 int ice_phy_cfg_tx_offset_e82x(struct ice_hw *hw, u8 port) 3999 { 4000 enum ice_ptp_link_spd link_spd; 4001 enum ice_ptp_fec_mode fec_mode; 4002 u64 total_offset, val; 4003 int err; 4004 u32 reg; 4005 4006 /* Nothing to do if we've already programmed the offset */ 4007 err = ice_read_phy_reg_e82x(hw, port, P_REG_TX_OR, ®); 4008 if (err) { 4009 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_OR for port %u, err %d\n", 4010 port, err); 4011 return err; 4012 } 4013 4014 if (reg) 4015 return 0; 4016 4017 err = ice_read_phy_reg_e82x(hw, port, P_REG_TX_OV_STATUS, ®); 4018 if (err) { 4019 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_OV_STATUS for port %u, err %d\n", 4020 port, err); 4021 return err; 4022 } 4023 4024 if (!(reg & P_REG_TX_OV_STATUS_OV_M)) 4025 return -EBUSY; 4026 4027 err = ice_phy_get_speed_and_fec_e82x(hw, port, &link_spd, &fec_mode); 4028 if (err) 4029 return err; 4030 4031 total_offset = ice_calc_fixed_tx_offset_e82x(hw, link_spd); 4032 4033 /* Read the first Vernier offset from the PHY register and add it to 4034 * the total offset. 4035 */ 4036 if (link_spd == ICE_PTP_LNK_SPD_1G || 4037 link_spd == ICE_PTP_LNK_SPD_10G || 4038 link_spd == ICE_PTP_LNK_SPD_25G || 4039 link_spd == ICE_PTP_LNK_SPD_25G_RS || 4040 link_spd == ICE_PTP_LNK_SPD_40G || 4041 link_spd == ICE_PTP_LNK_SPD_50G) { 4042 err = ice_read_64b_phy_reg_e82x(hw, port, 4043 P_REG_PAR_PCS_TX_OFFSET_L, 4044 &val); 4045 if (err) 4046 return err; 4047 4048 total_offset += val; 4049 } 4050 4051 /* For Tx, we only need to use the second Vernier offset for 4052 * multi-lane link speeds with RS-FEC. The lanes will always be 4053 * aligned. 4054 */ 4055 if (link_spd == ICE_PTP_LNK_SPD_50G_RS || 4056 link_spd == ICE_PTP_LNK_SPD_100G_RS) { 4057 err = ice_read_64b_phy_reg_e82x(hw, port, 4058 P_REG_PAR_TX_TIME_L, 4059 &val); 4060 if (err) 4061 return err; 4062 4063 total_offset += val; 4064 } 4065 4066 /* Now that the total offset has been calculated, program it to the 4067 * PHY and indicate that the Tx offset is ready. After this, 4068 * timestamps will be enabled. 4069 */ 4070 err = ice_write_64b_phy_reg_e82x(hw, port, P_REG_TOTAL_TX_OFFSET_L, 4071 total_offset); 4072 if (err) 4073 return err; 4074 4075 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_OR, 1); 4076 if (err) 4077 return err; 4078 4079 dev_info(ice_hw_to_dev(hw), "Port=%d Tx vernier offset calibration complete\n", 4080 port); 4081 4082 return 0; 4083 } 4084 4085 /** 4086 * ice_phy_calc_pmd_adj_e82x - Calculate PMD adjustment for Rx 4087 * @hw: pointer to the HW struct 4088 * @port: the PHY port to adjust for 4089 * @link_spd: the current link speed of the PHY 4090 * @fec_mode: the current FEC mode of the PHY 4091 * @pmd_adj: on return, the amount to adjust the Rx total offset by 4092 * 4093 * Calculates the adjustment to Rx timestamps due to PMD alignment in the PHY. 4094 * This varies by link speed and FEC mode. The value calculated accounts for 4095 * various delays caused when receiving a packet. 4096 */ 4097 static int 4098 ice_phy_calc_pmd_adj_e82x(struct ice_hw *hw, u8 port, 4099 enum ice_ptp_link_spd link_spd, 4100 enum ice_ptp_fec_mode fec_mode, u64 *pmd_adj) 4101 { 4102 u64 cur_freq, clk_incval, tu_per_sec, mult, adj; 4103 u8 pmd_align; 4104 u32 val; 4105 int err; 4106 4107 err = ice_read_phy_reg_e82x(hw, port, P_REG_PMD_ALIGNMENT, &val); 4108 if (err) { 4109 ice_debug(hw, ICE_DBG_PTP, "Failed to read PMD alignment, err %d\n", 4110 err); 4111 return err; 4112 } 4113 4114 pmd_align = (u8)val; 4115 4116 cur_freq = ice_e82x_pll_freq(ice_e82x_time_ref(hw)); 4117 clk_incval = ice_ptp_read_src_incval(hw); 4118 4119 /* Calculate TUs per second */ 4120 tu_per_sec = cur_freq * clk_incval; 4121 4122 /* The PMD alignment adjustment measurement depends on the link speed, 4123 * and whether FEC is enabled. For each link speed, the alignment 4124 * adjustment is calculated by dividing a value by the length of 4125 * a Time Unit in nanoseconds. 4126 * 4127 * 1G: align == 4 ? 10 * 0.8 : (align + 6 % 10) * 0.8 4128 * 10G: align == 65 ? 0 : (align * 0.1 * 32/33) 4129 * 10G w/FEC: align * 0.1 * 32/33 4130 * 25G: align == 65 ? 0 : (align * 0.4 * 32/33) 4131 * 25G w/FEC: align * 0.4 * 32/33 4132 * 40G: align == 65 ? 0 : (align * 0.1 * 32/33) 4133 * 40G w/FEC: align * 0.1 * 32/33 4134 * 50G: align == 65 ? 0 : (align * 0.4 * 32/33) 4135 * 50G w/FEC: align * 0.8 * 32/33 4136 * 4137 * For RS-FEC, if align is < 17 then we must also add 1.6 * 32/33. 4138 * 4139 * To allow for calculating this value using integer arithmetic, we 4140 * instead start with the number of TUs per second, (inverse of the 4141 * length of a Time Unit in nanoseconds), multiply by a value based 4142 * on the PMD alignment register, and then divide by the right value 4143 * calculated based on the table above. To avoid integer overflow this 4144 * division is broken up into a step of dividing by 125 first. 4145 */ 4146 if (link_spd == ICE_PTP_LNK_SPD_1G) { 4147 if (pmd_align == 4) 4148 mult = 10; 4149 else 4150 mult = (pmd_align + 6) % 10; 4151 } else if (link_spd == ICE_PTP_LNK_SPD_10G || 4152 link_spd == ICE_PTP_LNK_SPD_25G || 4153 link_spd == ICE_PTP_LNK_SPD_40G || 4154 link_spd == ICE_PTP_LNK_SPD_50G) { 4155 /* If Clause 74 FEC, always calculate PMD adjust */ 4156 if (pmd_align != 65 || fec_mode == ICE_PTP_FEC_MODE_CLAUSE74) 4157 mult = pmd_align; 4158 else 4159 mult = 0; 4160 } else if (link_spd == ICE_PTP_LNK_SPD_25G_RS || 4161 link_spd == ICE_PTP_LNK_SPD_50G_RS || 4162 link_spd == ICE_PTP_LNK_SPD_100G_RS) { 4163 if (pmd_align < 17) 4164 mult = pmd_align + 40; 4165 else 4166 mult = pmd_align; 4167 } else { 4168 ice_debug(hw, ICE_DBG_PTP, "Unknown link speed %d, skipping PMD adjustment\n", 4169 link_spd); 4170 mult = 0; 4171 } 4172 4173 /* In some cases, there's no need to adjust for the PMD alignment */ 4174 if (!mult) { 4175 *pmd_adj = 0; 4176 return 0; 4177 } 4178 4179 /* Calculate the adjustment by multiplying TUs per second by the 4180 * appropriate multiplier and divisor. To avoid overflow, we first 4181 * divide by 125, and then handle remaining divisor based on the link 4182 * speed pmd_adj_divisor value. 4183 */ 4184 adj = div_u64(tu_per_sec, 125); 4185 adj *= mult; 4186 adj = div_u64(adj, e822_vernier[link_spd].pmd_adj_divisor); 4187 4188 /* Finally, for 25G-RS and 50G-RS, a further adjustment for the Rx 4189 * cycle count is necessary. 4190 */ 4191 if (link_spd == ICE_PTP_LNK_SPD_25G_RS) { 4192 u64 cycle_adj; 4193 u8 rx_cycle; 4194 4195 err = ice_read_phy_reg_e82x(hw, port, P_REG_RX_40_TO_160_CNT, 4196 &val); 4197 if (err) { 4198 ice_debug(hw, ICE_DBG_PTP, "Failed to read 25G-RS Rx cycle count, err %d\n", 4199 err); 4200 return err; 4201 } 4202 4203 rx_cycle = val & P_REG_RX_40_TO_160_CNT_RXCYC_M; 4204 if (rx_cycle) { 4205 mult = (4 - rx_cycle) * 40; 4206 4207 cycle_adj = div_u64(tu_per_sec, 125); 4208 cycle_adj *= mult; 4209 cycle_adj = div_u64(cycle_adj, e822_vernier[link_spd].pmd_adj_divisor); 4210 4211 adj += cycle_adj; 4212 } 4213 } else if (link_spd == ICE_PTP_LNK_SPD_50G_RS) { 4214 u64 cycle_adj; 4215 u8 rx_cycle; 4216 4217 err = ice_read_phy_reg_e82x(hw, port, P_REG_RX_80_TO_160_CNT, 4218 &val); 4219 if (err) { 4220 ice_debug(hw, ICE_DBG_PTP, "Failed to read 50G-RS Rx cycle count, err %d\n", 4221 err); 4222 return err; 4223 } 4224 4225 rx_cycle = val & P_REG_RX_80_TO_160_CNT_RXCYC_M; 4226 if (rx_cycle) { 4227 mult = rx_cycle * 40; 4228 4229 cycle_adj = div_u64(tu_per_sec, 125); 4230 cycle_adj *= mult; 4231 cycle_adj = div_u64(cycle_adj, e822_vernier[link_spd].pmd_adj_divisor); 4232 4233 adj += cycle_adj; 4234 } 4235 } 4236 4237 /* Return the calculated adjustment */ 4238 *pmd_adj = adj; 4239 4240 return 0; 4241 } 4242 4243 /** 4244 * ice_calc_fixed_rx_offset_e82x - Calculated the fixed Rx offset for a port 4245 * @hw: pointer to HW struct 4246 * @link_spd: The Link speed to calculate for 4247 * 4248 * Determine the fixed Rx latency for a given link speed. 4249 */ 4250 static u64 4251 ice_calc_fixed_rx_offset_e82x(struct ice_hw *hw, enum ice_ptp_link_spd link_spd) 4252 { 4253 u64 cur_freq, clk_incval, tu_per_sec, fixed_offset; 4254 4255 cur_freq = ice_e82x_pll_freq(ice_e82x_time_ref(hw)); 4256 clk_incval = ice_ptp_read_src_incval(hw); 4257 4258 /* Calculate TUs per second */ 4259 tu_per_sec = cur_freq * clk_incval; 4260 4261 /* Calculate number of TUs to add for the fixed Rx latency. Since the 4262 * latency measurement is in 1/100th of a nanosecond, we need to 4263 * multiply by tu_per_sec and then divide by 1e11. This calculation 4264 * overflows 64 bit integer arithmetic, so break it up into two 4265 * divisions by 1e4 first then by 1e7. 4266 */ 4267 fixed_offset = div_u64(tu_per_sec, 10000); 4268 fixed_offset *= e822_vernier[link_spd].rx_fixed_delay; 4269 fixed_offset = div_u64(fixed_offset, 10000000); 4270 4271 return fixed_offset; 4272 } 4273 4274 /** 4275 * ice_phy_cfg_rx_offset_e82x - Configure total Rx timestamp offset 4276 * @hw: pointer to the HW struct 4277 * @port: the PHY port to configure 4278 * 4279 * Program the P_REG_TOTAL_RX_OFFSET register with the number of Time Units to 4280 * adjust Rx timestamps by. This combines calculations from the Vernier offset 4281 * measurements taken in hardware with some data about known fixed delay as 4282 * well as adjusting for multi-lane alignment delay. 4283 * 4284 * This function will not return successfully until the Rx offset calculations 4285 * have been completed, which requires waiting until at least one packet has 4286 * been received by the device. It is safe to call this function periodically 4287 * until calibration succeeds, as it will only program the offset once. 4288 * 4289 * This function must be called only after the offset registers are valid, 4290 * i.e. after the Vernier calibration wait has passed, to ensure that the PHY 4291 * has measured the offset. 4292 * 4293 * To avoid overflow, when calculating the offset based on the known static 4294 * latency values, we use measurements in 1/100th of a nanosecond, and divide 4295 * the TUs per second up front. This avoids overflow while allowing 4296 * calculation of the adjustment using integer arithmetic. 4297 * 4298 * Returns zero on success, -EBUSY if the hardware vernier offset 4299 * calibration has not completed, or another error code on failure. 4300 */ 4301 int ice_phy_cfg_rx_offset_e82x(struct ice_hw *hw, u8 port) 4302 { 4303 enum ice_ptp_link_spd link_spd; 4304 enum ice_ptp_fec_mode fec_mode; 4305 u64 total_offset, pmd, val; 4306 int err; 4307 u32 reg; 4308 4309 /* Nothing to do if we've already programmed the offset */ 4310 err = ice_read_phy_reg_e82x(hw, port, P_REG_RX_OR, ®); 4311 if (err) { 4312 ice_debug(hw, ICE_DBG_PTP, "Failed to read RX_OR for port %u, err %d\n", 4313 port, err); 4314 return err; 4315 } 4316 4317 if (reg) 4318 return 0; 4319 4320 err = ice_read_phy_reg_e82x(hw, port, P_REG_RX_OV_STATUS, ®); 4321 if (err) { 4322 ice_debug(hw, ICE_DBG_PTP, "Failed to read RX_OV_STATUS for port %u, err %d\n", 4323 port, err); 4324 return err; 4325 } 4326 4327 if (!(reg & P_REG_RX_OV_STATUS_OV_M)) 4328 return -EBUSY; 4329 4330 err = ice_phy_get_speed_and_fec_e82x(hw, port, &link_spd, &fec_mode); 4331 if (err) 4332 return err; 4333 4334 total_offset = ice_calc_fixed_rx_offset_e82x(hw, link_spd); 4335 4336 /* Read the first Vernier offset from the PHY register and add it to 4337 * the total offset. 4338 */ 4339 err = ice_read_64b_phy_reg_e82x(hw, port, 4340 P_REG_PAR_PCS_RX_OFFSET_L, 4341 &val); 4342 if (err) 4343 return err; 4344 4345 total_offset += val; 4346 4347 /* For Rx, all multi-lane link speeds include a second Vernier 4348 * calibration, because the lanes might not be aligned. 4349 */ 4350 if (link_spd == ICE_PTP_LNK_SPD_40G || 4351 link_spd == ICE_PTP_LNK_SPD_50G || 4352 link_spd == ICE_PTP_LNK_SPD_50G_RS || 4353 link_spd == ICE_PTP_LNK_SPD_100G_RS) { 4354 err = ice_read_64b_phy_reg_e82x(hw, port, 4355 P_REG_PAR_RX_TIME_L, 4356 &val); 4357 if (err) 4358 return err; 4359 4360 total_offset += val; 4361 } 4362 4363 /* In addition, Rx must account for the PMD alignment */ 4364 err = ice_phy_calc_pmd_adj_e82x(hw, port, link_spd, fec_mode, &pmd); 4365 if (err) 4366 return err; 4367 4368 /* For RS-FEC, this adjustment adds delay, but for other modes, it 4369 * subtracts delay. 4370 */ 4371 if (fec_mode == ICE_PTP_FEC_MODE_RS_FEC) 4372 total_offset += pmd; 4373 else 4374 total_offset -= pmd; 4375 4376 /* Now that the total offset has been calculated, program it to the 4377 * PHY and indicate that the Rx offset is ready. After this, 4378 * timestamps will be enabled. 4379 */ 4380 err = ice_write_64b_phy_reg_e82x(hw, port, P_REG_TOTAL_RX_OFFSET_L, 4381 total_offset); 4382 if (err) 4383 return err; 4384 4385 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_OR, 1); 4386 if (err) 4387 return err; 4388 4389 dev_info(ice_hw_to_dev(hw), "Port=%d Rx vernier offset calibration complete\n", 4390 port); 4391 4392 return 0; 4393 } 4394 4395 /** 4396 * ice_ptp_clear_phy_offset_ready_e82x - Clear PHY TX_/RX_OFFSET_READY registers 4397 * @hw: pointer to the HW struct 4398 * 4399 * Clear PHY TX_/RX_OFFSET_READY registers, effectively marking all transmitted 4400 * and received timestamps as invalid. 4401 * 4402 * Return: 0 on success, other error codes when failed to write to PHY 4403 */ 4404 int ice_ptp_clear_phy_offset_ready_e82x(struct ice_hw *hw) 4405 { 4406 u8 port; 4407 4408 for (port = 0; port < hw->ptp.num_lports; port++) { 4409 int err; 4410 4411 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_OR, 0); 4412 if (err) { 4413 dev_warn(ice_hw_to_dev(hw), 4414 "Failed to clear PHY TX_OFFSET_READY register\n"); 4415 return err; 4416 } 4417 4418 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_OR, 0); 4419 if (err) { 4420 dev_warn(ice_hw_to_dev(hw), 4421 "Failed to clear PHY RX_OFFSET_READY register\n"); 4422 return err; 4423 } 4424 } 4425 4426 return 0; 4427 } 4428 4429 /** 4430 * ice_read_phy_and_phc_time_e82x - Simultaneously capture PHC and PHY time 4431 * @hw: pointer to the HW struct 4432 * @port: the PHY port to read 4433 * @phy_time: on return, the 64bit PHY timer value 4434 * @phc_time: on return, the lower 64bits of PHC time 4435 * 4436 * Issue a ICE_PTP_READ_TIME timer command to simultaneously capture the PHY 4437 * and PHC timer values. 4438 */ 4439 static int 4440 ice_read_phy_and_phc_time_e82x(struct ice_hw *hw, u8 port, u64 *phy_time, 4441 u64 *phc_time) 4442 { 4443 u64 tx_time, rx_time; 4444 u32 zo, lo; 4445 u8 tmr_idx; 4446 int err; 4447 4448 tmr_idx = ice_get_ptp_src_clock_index(hw); 4449 4450 /* Prepare the PHC timer for a ICE_PTP_READ_TIME capture command */ 4451 ice_ptp_src_cmd(hw, ICE_PTP_READ_TIME); 4452 4453 /* Prepare the PHY timer for a ICE_PTP_READ_TIME capture command */ 4454 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_READ_TIME); 4455 if (err) 4456 return err; 4457 4458 /* Issue the sync to start the ICE_PTP_READ_TIME capture */ 4459 ice_ptp_exec_tmr_cmd(hw); 4460 4461 /* Read the captured PHC time from the shadow time registers */ 4462 zo = rd32(hw, GLTSYN_SHTIME_0(tmr_idx)); 4463 lo = rd32(hw, GLTSYN_SHTIME_L(tmr_idx)); 4464 *phc_time = (u64)lo << 32 | zo; 4465 4466 /* Read the captured PHY time from the PHY shadow registers */ 4467 err = ice_ptp_read_port_capture(hw, port, &tx_time, &rx_time); 4468 if (err) 4469 return err; 4470 4471 /* If the PHY Tx and Rx timers don't match, log a warning message. 4472 * Note that this should not happen in normal circumstances since the 4473 * driver always programs them together. 4474 */ 4475 if (tx_time != rx_time) 4476 dev_warn(ice_hw_to_dev(hw), 4477 "PHY port %u Tx and Rx timers do not match, tx_time 0x%016llX, rx_time 0x%016llX\n", 4478 port, (unsigned long long)tx_time, 4479 (unsigned long long)rx_time); 4480 4481 *phy_time = tx_time; 4482 4483 return 0; 4484 } 4485 4486 /** 4487 * ice_sync_phy_timer_e82x - Synchronize the PHY timer with PHC timer 4488 * @hw: pointer to the HW struct 4489 * @port: the PHY port to synchronize 4490 * 4491 * Perform an adjustment to ensure that the PHY and PHC timers are in sync. 4492 * This is done by issuing a ICE_PTP_READ_TIME command which triggers a 4493 * simultaneous read of the PHY timer and PHC timer. Then we use the 4494 * difference to calculate an appropriate 2s complement addition to add 4495 * to the PHY timer in order to ensure it reads the same value as the 4496 * primary PHC timer. 4497 */ 4498 static int ice_sync_phy_timer_e82x(struct ice_hw *hw, u8 port) 4499 { 4500 u64 phc_time, phy_time, difference; 4501 int err; 4502 4503 if (!ice_ptp_lock(hw)) { 4504 ice_debug(hw, ICE_DBG_PTP, "Failed to acquire PTP semaphore\n"); 4505 return -EBUSY; 4506 } 4507 4508 err = ice_read_phy_and_phc_time_e82x(hw, port, &phy_time, &phc_time); 4509 if (err) 4510 goto err_unlock; 4511 4512 /* Calculate the amount required to add to the port time in order for 4513 * it to match the PHC time. 4514 * 4515 * Note that the port adjustment is done using 2s complement 4516 * arithmetic. This is convenient since it means that we can simply 4517 * calculate the difference between the PHC time and the port time, 4518 * and it will be interpreted correctly. 4519 */ 4520 difference = phc_time - phy_time; 4521 4522 err = ice_ptp_prep_port_adj_e82x(hw, port, (s64)difference); 4523 if (err) 4524 goto err_unlock; 4525 4526 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_ADJ_TIME); 4527 if (err) 4528 goto err_unlock; 4529 4530 /* Do not perform any action on the main timer */ 4531 ice_ptp_src_cmd(hw, ICE_PTP_NOP); 4532 4533 /* Issue the sync to activate the time adjustment */ 4534 ice_ptp_exec_tmr_cmd(hw); 4535 4536 /* Re-capture the timer values to flush the command registers and 4537 * verify that the time was properly adjusted. 4538 */ 4539 err = ice_read_phy_and_phc_time_e82x(hw, port, &phy_time, &phc_time); 4540 if (err) 4541 goto err_unlock; 4542 4543 dev_info(ice_hw_to_dev(hw), 4544 "Port %u PHY time synced to PHC: 0x%016llX, 0x%016llX\n", 4545 port, (unsigned long long)phy_time, 4546 (unsigned long long)phc_time); 4547 4548 ice_ptp_unlock(hw); 4549 4550 return 0; 4551 4552 err_unlock: 4553 ice_ptp_unlock(hw); 4554 return err; 4555 } 4556 4557 /** 4558 * ice_stop_phy_timer_e82x - Stop the PHY clock timer 4559 * @hw: pointer to the HW struct 4560 * @port: the PHY port to stop 4561 * @soft_reset: if true, hold the SOFT_RESET bit of P_REG_PS 4562 * 4563 * Stop the clock of a PHY port. This must be done as part of the flow to 4564 * re-calibrate Tx and Rx timestamping offsets whenever the clock time is 4565 * initialized or when link speed changes. 4566 */ 4567 int 4568 ice_stop_phy_timer_e82x(struct ice_hw *hw, u8 port, bool soft_reset) 4569 { 4570 int err; 4571 u32 val; 4572 4573 err = ice_write_phy_reg_e82x(hw, port, P_REG_TX_OR, 0); 4574 if (err) 4575 return err; 4576 4577 err = ice_write_phy_reg_e82x(hw, port, P_REG_RX_OR, 0); 4578 if (err) 4579 return err; 4580 4581 err = ice_read_phy_reg_e82x(hw, port, P_REG_PS, &val); 4582 if (err) 4583 return err; 4584 4585 val &= ~P_REG_PS_START_M; 4586 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4587 if (err) 4588 return err; 4589 4590 val &= ~P_REG_PS_ENA_CLK_M; 4591 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4592 if (err) 4593 return err; 4594 4595 if (soft_reset) { 4596 val |= P_REG_PS_SFT_RESET_M; 4597 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4598 if (err) 4599 return err; 4600 } 4601 4602 ice_debug(hw, ICE_DBG_PTP, "Disabled clock on PHY port %u\n", port); 4603 4604 return 0; 4605 } 4606 4607 /** 4608 * ice_start_phy_timer_e82x - Start the PHY clock timer 4609 * @hw: pointer to the HW struct 4610 * @port: the PHY port to start 4611 * 4612 * Start the clock of a PHY port. This must be done as part of the flow to 4613 * re-calibrate Tx and Rx timestamping offsets whenever the clock time is 4614 * initialized or when link speed changes. 4615 * 4616 * Hardware will take Vernier measurements on Tx or Rx of packets. 4617 */ 4618 int ice_start_phy_timer_e82x(struct ice_hw *hw, u8 port) 4619 { 4620 u32 lo, hi, val; 4621 u64 incval; 4622 u8 tmr_idx; 4623 int err; 4624 4625 tmr_idx = ice_get_ptp_src_clock_index(hw); 4626 4627 err = ice_stop_phy_timer_e82x(hw, port, false); 4628 if (err) 4629 return err; 4630 4631 ice_phy_cfg_lane_e82x(hw, port); 4632 4633 err = ice_phy_cfg_uix_e82x(hw, port); 4634 if (err) 4635 return err; 4636 4637 err = ice_phy_cfg_parpcs_e82x(hw, port); 4638 if (err) 4639 return err; 4640 4641 lo = rd32(hw, GLTSYN_INCVAL_L(tmr_idx)); 4642 hi = rd32(hw, GLTSYN_INCVAL_H(tmr_idx)); 4643 incval = (u64)hi << 32 | lo; 4644 4645 err = ice_write_40b_phy_reg_e82x(hw, port, P_REG_TIMETUS_L, incval); 4646 if (err) 4647 return err; 4648 4649 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_INIT_INCVAL); 4650 if (err) 4651 return err; 4652 4653 /* Do not perform any action on the main timer */ 4654 ice_ptp_src_cmd(hw, ICE_PTP_NOP); 4655 4656 ice_ptp_exec_tmr_cmd(hw); 4657 4658 err = ice_read_phy_reg_e82x(hw, port, P_REG_PS, &val); 4659 if (err) 4660 return err; 4661 4662 val |= P_REG_PS_SFT_RESET_M; 4663 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4664 if (err) 4665 return err; 4666 4667 val |= P_REG_PS_START_M; 4668 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4669 if (err) 4670 return err; 4671 4672 val &= ~P_REG_PS_SFT_RESET_M; 4673 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4674 if (err) 4675 return err; 4676 4677 err = ice_ptp_one_port_cmd(hw, port, ICE_PTP_INIT_INCVAL); 4678 if (err) 4679 return err; 4680 4681 ice_ptp_exec_tmr_cmd(hw); 4682 4683 val |= P_REG_PS_ENA_CLK_M; 4684 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4685 if (err) 4686 return err; 4687 4688 val |= P_REG_PS_LOAD_OFFSET_M; 4689 err = ice_write_phy_reg_e82x(hw, port, P_REG_PS, val); 4690 if (err) 4691 return err; 4692 4693 ice_ptp_exec_tmr_cmd(hw); 4694 4695 err = ice_sync_phy_timer_e82x(hw, port); 4696 if (err) 4697 return err; 4698 4699 ice_debug(hw, ICE_DBG_PTP, "Enabled clock on PHY port %u\n", port); 4700 4701 return 0; 4702 } 4703 4704 /** 4705 * ice_get_phy_tx_tstamp_ready_e82x - Read Tx memory status register 4706 * @hw: pointer to the HW struct 4707 * @quad: the timestamp quad to read from 4708 * @tstamp_ready: contents of the Tx memory status register 4709 * 4710 * Read the Q_REG_TX_MEMORY_STATUS register indicating which timestamps in 4711 * the PHY are ready. A set bit means the corresponding timestamp is valid and 4712 * ready to be captured from the PHY timestamp block. 4713 */ 4714 static int 4715 ice_get_phy_tx_tstamp_ready_e82x(struct ice_hw *hw, u8 quad, u64 *tstamp_ready) 4716 { 4717 u32 hi, lo; 4718 int err; 4719 4720 err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEMORY_STATUS_U, &hi); 4721 if (err) { 4722 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_MEMORY_STATUS_U for quad %u, err %d\n", 4723 quad, err); 4724 return err; 4725 } 4726 4727 err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEMORY_STATUS_L, &lo); 4728 if (err) { 4729 ice_debug(hw, ICE_DBG_PTP, "Failed to read TX_MEMORY_STATUS_L for quad %u, err %d\n", 4730 quad, err); 4731 return err; 4732 } 4733 4734 *tstamp_ready = (u64)hi << 32 | (u64)lo; 4735 4736 return 0; 4737 } 4738 4739 /** 4740 * ice_phy_cfg_intr_e82x - Configure TX timestamp interrupt 4741 * @hw: pointer to the HW struct 4742 * @quad: the timestamp quad 4743 * @ena: enable or disable interrupt 4744 * @threshold: interrupt threshold 4745 * 4746 * Configure TX timestamp interrupt for the specified quad 4747 * 4748 * Return: 0 on success, other error codes when failed to read/write quad 4749 */ 4750 4751 int ice_phy_cfg_intr_e82x(struct ice_hw *hw, u8 quad, bool ena, u8 threshold) 4752 { 4753 int err; 4754 u32 val; 4755 4756 err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, &val); 4757 if (err) 4758 return err; 4759 4760 val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M; 4761 if (ena) { 4762 val |= Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M; 4763 val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_THR_M; 4764 val |= FIELD_PREP(Q_REG_TX_MEM_GBL_CFG_INTR_THR_M, threshold); 4765 } 4766 4767 return ice_write_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, val); 4768 } 4769 4770 /** 4771 * ice_ptp_init_phy_e82x - initialize PHY parameters 4772 * @ptp: pointer to the PTP HW struct 4773 */ 4774 static void ice_ptp_init_phy_e82x(struct ice_ptp_hw *ptp) 4775 { 4776 ptp->phy_model = ICE_PHY_E82X; 4777 ptp->num_lports = 8; 4778 ptp->ports_per_phy = 8; 4779 } 4780 4781 /* E810 functions 4782 * 4783 * The following functions operate on the E810 series devices which use 4784 * a separate external PHY. 4785 */ 4786 4787 /** 4788 * ice_read_phy_reg_e810 - Read register from external PHY on E810 4789 * @hw: pointer to the HW struct 4790 * @addr: the address to read from 4791 * @val: On return, the value read from the PHY 4792 * 4793 * Read a register from the external PHY on the E810 device. 4794 */ 4795 static int ice_read_phy_reg_e810(struct ice_hw *hw, u32 addr, u32 *val) 4796 { 4797 struct ice_sbq_msg_input msg = {0}; 4798 int err; 4799 4800 msg.msg_addr_low = lower_16_bits(addr); 4801 msg.msg_addr_high = upper_16_bits(addr); 4802 msg.opcode = ice_sbq_msg_rd; 4803 msg.dest_dev = rmn_0; 4804 4805 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 4806 if (err) { 4807 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 4808 err); 4809 return err; 4810 } 4811 4812 *val = msg.data; 4813 4814 return 0; 4815 } 4816 4817 /** 4818 * ice_write_phy_reg_e810 - Write register on external PHY on E810 4819 * @hw: pointer to the HW struct 4820 * @addr: the address to writem to 4821 * @val: the value to write to the PHY 4822 * 4823 * Write a value to a register of the external PHY on the E810 device. 4824 */ 4825 static int ice_write_phy_reg_e810(struct ice_hw *hw, u32 addr, u32 val) 4826 { 4827 struct ice_sbq_msg_input msg = {0}; 4828 int err; 4829 4830 msg.msg_addr_low = lower_16_bits(addr); 4831 msg.msg_addr_high = upper_16_bits(addr); 4832 msg.opcode = ice_sbq_msg_wr; 4833 msg.dest_dev = rmn_0; 4834 msg.data = val; 4835 4836 err = ice_sbq_rw_reg(hw, &msg, ICE_AQ_FLAG_RD); 4837 if (err) { 4838 ice_debug(hw, ICE_DBG_PTP, "Failed to send message to PHY, err %d\n", 4839 err); 4840 return err; 4841 } 4842 4843 return 0; 4844 } 4845 4846 /** 4847 * ice_read_phy_tstamp_ll_e810 - Read a PHY timestamp registers through the FW 4848 * @hw: pointer to the HW struct 4849 * @idx: the timestamp index to read 4850 * @hi: 8 bit timestamp high value 4851 * @lo: 32 bit timestamp low value 4852 * 4853 * Read a 8bit timestamp high value and 32 bit timestamp low value out of the 4854 * timestamp block of the external PHY on the E810 device using the low latency 4855 * timestamp read. 4856 */ 4857 static int 4858 ice_read_phy_tstamp_ll_e810(struct ice_hw *hw, u8 idx, u8 *hi, u32 *lo) 4859 { 4860 u32 val; 4861 u8 i; 4862 4863 /* Write TS index to read to the PF register so the FW can read it */ 4864 val = FIELD_PREP(TS_LL_READ_TS_IDX, idx) | TS_LL_READ_TS; 4865 wr32(hw, PF_SB_ATQBAL, val); 4866 4867 /* Read the register repeatedly until the FW provides us the TS */ 4868 for (i = TS_LL_READ_RETRIES; i > 0; i--) { 4869 val = rd32(hw, PF_SB_ATQBAL); 4870 4871 /* When the bit is cleared, the TS is ready in the register */ 4872 if (!(FIELD_GET(TS_LL_READ_TS, val))) { 4873 /* High 8 bit value of the TS is on the bits 16:23 */ 4874 *hi = FIELD_GET(TS_LL_READ_TS_HIGH, val); 4875 4876 /* Read the low 32 bit value and set the TS valid bit */ 4877 *lo = rd32(hw, PF_SB_ATQBAH) | TS_VALID; 4878 return 0; 4879 } 4880 4881 udelay(10); 4882 } 4883 4884 /* FW failed to provide the TS in time */ 4885 ice_debug(hw, ICE_DBG_PTP, "Failed to read PTP timestamp using low latency read\n"); 4886 return -EINVAL; 4887 } 4888 4889 /** 4890 * ice_read_phy_tstamp_sbq_e810 - Read a PHY timestamp registers through the sbq 4891 * @hw: pointer to the HW struct 4892 * @lport: the lport to read from 4893 * @idx: the timestamp index to read 4894 * @hi: 8 bit timestamp high value 4895 * @lo: 32 bit timestamp low value 4896 * 4897 * Read a 8bit timestamp high value and 32 bit timestamp low value out of the 4898 * timestamp block of the external PHY on the E810 device using sideband queue. 4899 */ 4900 static int 4901 ice_read_phy_tstamp_sbq_e810(struct ice_hw *hw, u8 lport, u8 idx, u8 *hi, 4902 u32 *lo) 4903 { 4904 u32 hi_addr = TS_EXT(HIGH_TX_MEMORY_BANK_START, lport, idx); 4905 u32 lo_addr = TS_EXT(LOW_TX_MEMORY_BANK_START, lport, idx); 4906 u32 lo_val, hi_val; 4907 int err; 4908 4909 err = ice_read_phy_reg_e810(hw, lo_addr, &lo_val); 4910 if (err) { 4911 ice_debug(hw, ICE_DBG_PTP, "Failed to read low PTP timestamp register, err %d\n", 4912 err); 4913 return err; 4914 } 4915 4916 err = ice_read_phy_reg_e810(hw, hi_addr, &hi_val); 4917 if (err) { 4918 ice_debug(hw, ICE_DBG_PTP, "Failed to read high PTP timestamp register, err %d\n", 4919 err); 4920 return err; 4921 } 4922 4923 *lo = lo_val; 4924 *hi = (u8)hi_val; 4925 4926 return 0; 4927 } 4928 4929 /** 4930 * ice_read_phy_tstamp_e810 - Read a PHY timestamp out of the external PHY 4931 * @hw: pointer to the HW struct 4932 * @lport: the lport to read from 4933 * @idx: the timestamp index to read 4934 * @tstamp: on return, the 40bit timestamp value 4935 * 4936 * Read a 40bit timestamp value out of the timestamp block of the external PHY 4937 * on the E810 device. 4938 */ 4939 static int 4940 ice_read_phy_tstamp_e810(struct ice_hw *hw, u8 lport, u8 idx, u64 *tstamp) 4941 { 4942 u32 lo = 0; 4943 u8 hi = 0; 4944 int err; 4945 4946 if (hw->dev_caps.ts_dev_info.ts_ll_read) 4947 err = ice_read_phy_tstamp_ll_e810(hw, idx, &hi, &lo); 4948 else 4949 err = ice_read_phy_tstamp_sbq_e810(hw, lport, idx, &hi, &lo); 4950 4951 if (err) 4952 return err; 4953 4954 /* For E810 devices, the timestamp is reported with the lower 32 bits 4955 * in the low register, and the upper 8 bits in the high register. 4956 */ 4957 *tstamp = ((u64)hi) << TS_HIGH_S | ((u64)lo & TS_LOW_M); 4958 4959 return 0; 4960 } 4961 4962 /** 4963 * ice_clear_phy_tstamp_e810 - Clear a timestamp from the external PHY 4964 * @hw: pointer to the HW struct 4965 * @lport: the lport to read from 4966 * @idx: the timestamp index to reset 4967 * 4968 * Read the timestamp and then forcibly overwrite its value to clear the valid 4969 * bit from the timestamp block of the external PHY on the E810 device. 4970 * 4971 * This function should only be called on an idx whose bit is set according to 4972 * ice_get_phy_tx_tstamp_ready(). 4973 */ 4974 static int ice_clear_phy_tstamp_e810(struct ice_hw *hw, u8 lport, u8 idx) 4975 { 4976 u32 lo_addr, hi_addr; 4977 u64 unused_tstamp; 4978 int err; 4979 4980 err = ice_read_phy_tstamp_e810(hw, lport, idx, &unused_tstamp); 4981 if (err) { 4982 ice_debug(hw, ICE_DBG_PTP, "Failed to read the timestamp register for lport %u, idx %u, err %d\n", 4983 lport, idx, err); 4984 return err; 4985 } 4986 4987 lo_addr = TS_EXT(LOW_TX_MEMORY_BANK_START, lport, idx); 4988 hi_addr = TS_EXT(HIGH_TX_MEMORY_BANK_START, lport, idx); 4989 4990 err = ice_write_phy_reg_e810(hw, lo_addr, 0); 4991 if (err) { 4992 ice_debug(hw, ICE_DBG_PTP, "Failed to clear low PTP timestamp register for lport %u, idx %u, err %d\n", 4993 lport, idx, err); 4994 return err; 4995 } 4996 4997 err = ice_write_phy_reg_e810(hw, hi_addr, 0); 4998 if (err) { 4999 ice_debug(hw, ICE_DBG_PTP, "Failed to clear high PTP timestamp register for lport %u, idx %u, err %d\n", 5000 lport, idx, err); 5001 return err; 5002 } 5003 5004 return 0; 5005 } 5006 5007 /** 5008 * ice_ptp_init_phc_e810 - Perform E810 specific PHC initialization 5009 * @hw: pointer to HW struct 5010 * 5011 * Perform E810-specific PTP hardware clock initialization steps. 5012 * 5013 * Return: 0 on success, other error codes when failed to initialize TimeSync 5014 */ 5015 static int ice_ptp_init_phc_e810(struct ice_hw *hw) 5016 { 5017 u8 tmr_idx; 5018 int err; 5019 5020 /* Ensure synchronization delay is zero */ 5021 wr32(hw, GLTSYN_SYNC_DLAY, 0); 5022 5023 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5024 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_ENA(tmr_idx), 5025 GLTSYN_ENA_TSYN_ENA_M); 5026 if (err) 5027 ice_debug(hw, ICE_DBG_PTP, "PTP failed in ena_phy_time_syn %d\n", 5028 err); 5029 5030 return err; 5031 } 5032 5033 /** 5034 * ice_ptp_prep_phy_time_e810 - Prepare PHY port with initial time 5035 * @hw: Board private structure 5036 * @time: Time to initialize the PHY port clock to 5037 * 5038 * Program the PHY port ETH_GLTSYN_SHTIME registers in preparation setting the 5039 * initial clock time. The time will not actually be programmed until the 5040 * driver issues an ICE_PTP_INIT_TIME command. 5041 * 5042 * The time value is the upper 32 bits of the PHY timer, usually in units of 5043 * nominal nanoseconds. 5044 */ 5045 static int ice_ptp_prep_phy_time_e810(struct ice_hw *hw, u32 time) 5046 { 5047 u8 tmr_idx; 5048 int err; 5049 5050 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5051 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHTIME_0(tmr_idx), 0); 5052 if (err) { 5053 ice_debug(hw, ICE_DBG_PTP, "Failed to write SHTIME_0, err %d\n", 5054 err); 5055 return err; 5056 } 5057 5058 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHTIME_L(tmr_idx), time); 5059 if (err) { 5060 ice_debug(hw, ICE_DBG_PTP, "Failed to write SHTIME_L, err %d\n", 5061 err); 5062 return err; 5063 } 5064 5065 return 0; 5066 } 5067 5068 /** 5069 * ice_ptp_prep_phy_adj_e810 - Prep PHY port for a time adjustment 5070 * @hw: pointer to HW struct 5071 * @adj: adjustment value to program 5072 * 5073 * Prepare the PHY port for an atomic adjustment by programming the PHY 5074 * ETH_GLTSYN_SHADJ_L and ETH_GLTSYN_SHADJ_H registers. The actual adjustment 5075 * is completed by issuing an ICE_PTP_ADJ_TIME sync command. 5076 * 5077 * The adjustment value only contains the portion used for the upper 32bits of 5078 * the PHY timer, usually in units of nominal nanoseconds. Negative 5079 * adjustments are supported using 2s complement arithmetic. 5080 */ 5081 static int ice_ptp_prep_phy_adj_e810(struct ice_hw *hw, s32 adj) 5082 { 5083 u8 tmr_idx; 5084 int err; 5085 5086 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5087 5088 /* Adjustments are represented as signed 2's complement values in 5089 * nanoseconds. Sub-nanosecond adjustment is not supported. 5090 */ 5091 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHADJ_L(tmr_idx), 0); 5092 if (err) { 5093 ice_debug(hw, ICE_DBG_PTP, "Failed to write adj to PHY SHADJ_L, err %d\n", 5094 err); 5095 return err; 5096 } 5097 5098 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHADJ_H(tmr_idx), adj); 5099 if (err) { 5100 ice_debug(hw, ICE_DBG_PTP, "Failed to write adj to PHY SHADJ_H, err %d\n", 5101 err); 5102 return err; 5103 } 5104 5105 return 0; 5106 } 5107 5108 /** 5109 * ice_ptp_prep_phy_incval_e810 - Prep PHY port increment value change 5110 * @hw: pointer to HW struct 5111 * @incval: The new 40bit increment value to prepare 5112 * 5113 * Prepare the PHY port for a new increment value by programming the PHY 5114 * ETH_GLTSYN_SHADJ_L and ETH_GLTSYN_SHADJ_H registers. The actual change is 5115 * completed by issuing an ICE_PTP_INIT_INCVAL command. 5116 */ 5117 static int ice_ptp_prep_phy_incval_e810(struct ice_hw *hw, u64 incval) 5118 { 5119 u32 high, low; 5120 u8 tmr_idx; 5121 int err; 5122 5123 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5124 low = lower_32_bits(incval); 5125 high = upper_32_bits(incval); 5126 5127 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHADJ_L(tmr_idx), low); 5128 if (err) { 5129 ice_debug(hw, ICE_DBG_PTP, "Failed to write incval to PHY SHADJ_L, err %d\n", 5130 err); 5131 return err; 5132 } 5133 5134 err = ice_write_phy_reg_e810(hw, ETH_GLTSYN_SHADJ_H(tmr_idx), high); 5135 if (err) { 5136 ice_debug(hw, ICE_DBG_PTP, "Failed to write incval PHY SHADJ_H, err %d\n", 5137 err); 5138 return err; 5139 } 5140 5141 return 0; 5142 } 5143 5144 /** 5145 * ice_ptp_port_cmd_e810 - Prepare all external PHYs for a timer command 5146 * @hw: pointer to HW struct 5147 * @cmd: Command to be sent to the port 5148 * 5149 * Prepare the external PHYs connected to this device for a timer sync 5150 * command. 5151 */ 5152 static int ice_ptp_port_cmd_e810(struct ice_hw *hw, enum ice_ptp_tmr_cmd cmd) 5153 { 5154 u32 val = ice_ptp_tmr_cmd_to_port_reg(hw, cmd); 5155 5156 return ice_write_phy_reg_e810(hw, E810_ETH_GLTSYN_CMD, val); 5157 } 5158 5159 /** 5160 * ice_get_phy_tx_tstamp_ready_e810 - Read Tx memory status register 5161 * @hw: pointer to the HW struct 5162 * @port: the PHY port to read 5163 * @tstamp_ready: contents of the Tx memory status register 5164 * 5165 * E810 devices do not use a Tx memory status register. Instead simply 5166 * indicate that all timestamps are currently ready. 5167 */ 5168 static int 5169 ice_get_phy_tx_tstamp_ready_e810(struct ice_hw *hw, u8 port, u64 *tstamp_ready) 5170 { 5171 *tstamp_ready = 0xFFFFFFFFFFFFFFFF; 5172 return 0; 5173 } 5174 5175 /* E810 SMA functions 5176 * 5177 * The following functions operate specifically on E810 hardware and are used 5178 * to access the extended GPIOs available. 5179 */ 5180 5181 /** 5182 * ice_get_pca9575_handle 5183 * @hw: pointer to the hw struct 5184 * @pca9575_handle: GPIO controller's handle 5185 * 5186 * Find and return the GPIO controller's handle in the netlist. 5187 * When found - the value will be cached in the hw structure and following calls 5188 * will return cached value 5189 */ 5190 static int 5191 ice_get_pca9575_handle(struct ice_hw *hw, u16 *pca9575_handle) 5192 { 5193 struct ice_aqc_get_link_topo *cmd; 5194 struct ice_aq_desc desc; 5195 int status; 5196 u8 idx; 5197 5198 /* If handle was read previously return cached value */ 5199 if (hw->io_expander_handle) { 5200 *pca9575_handle = hw->io_expander_handle; 5201 return 0; 5202 } 5203 5204 /* If handle was not detected read it from the netlist */ 5205 cmd = &desc.params.get_link_topo; 5206 ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_get_link_topo); 5207 5208 /* Set node type to GPIO controller */ 5209 cmd->addr.topo_params.node_type_ctx = 5210 (ICE_AQC_LINK_TOPO_NODE_TYPE_M & 5211 ICE_AQC_LINK_TOPO_NODE_TYPE_GPIO_CTRL); 5212 5213 #define SW_PCA9575_SFP_TOPO_IDX 2 5214 #define SW_PCA9575_QSFP_TOPO_IDX 1 5215 5216 /* Check if the SW IO expander controlling SMA exists in the netlist. */ 5217 if (hw->device_id == ICE_DEV_ID_E810C_SFP) 5218 idx = SW_PCA9575_SFP_TOPO_IDX; 5219 else if (hw->device_id == ICE_DEV_ID_E810C_QSFP) 5220 idx = SW_PCA9575_QSFP_TOPO_IDX; 5221 else 5222 return -EOPNOTSUPP; 5223 5224 cmd->addr.topo_params.index = idx; 5225 5226 status = ice_aq_send_cmd(hw, &desc, NULL, 0, NULL); 5227 if (status) 5228 return -EOPNOTSUPP; 5229 5230 /* Verify if we found the right IO expander type */ 5231 if (desc.params.get_link_topo.node_part_num != 5232 ICE_AQC_GET_LINK_TOPO_NODE_NR_PCA9575) 5233 return -EOPNOTSUPP; 5234 5235 /* If present save the handle and return it */ 5236 hw->io_expander_handle = 5237 le16_to_cpu(desc.params.get_link_topo.addr.handle); 5238 *pca9575_handle = hw->io_expander_handle; 5239 5240 return 0; 5241 } 5242 5243 /** 5244 * ice_read_sma_ctrl 5245 * @hw: pointer to the hw struct 5246 * @data: pointer to data to be read from the GPIO controller 5247 * 5248 * Read the SMA controller state. It is connected to pins 3-7 of Port 1 of the 5249 * PCA9575 expander, so only bits 3-7 in data are valid. 5250 */ 5251 int ice_read_sma_ctrl(struct ice_hw *hw, u8 *data) 5252 { 5253 int status; 5254 u16 handle; 5255 u8 i; 5256 5257 status = ice_get_pca9575_handle(hw, &handle); 5258 if (status) 5259 return status; 5260 5261 *data = 0; 5262 5263 for (i = ICE_SMA_MIN_BIT; i <= ICE_SMA_MAX_BIT; i++) { 5264 bool pin; 5265 5266 status = ice_aq_get_gpio(hw, handle, i + ICE_PCA9575_P1_OFFSET, 5267 &pin, NULL); 5268 if (status) 5269 break; 5270 *data |= (u8)(!pin) << i; 5271 } 5272 5273 return status; 5274 } 5275 5276 /** 5277 * ice_write_sma_ctrl 5278 * @hw: pointer to the hw struct 5279 * @data: data to be written to the GPIO controller 5280 * 5281 * Write the data to the SMA controller. It is connected to pins 3-7 of Port 1 5282 * of the PCA9575 expander, so only bits 3-7 in data are valid. 5283 */ 5284 int ice_write_sma_ctrl(struct ice_hw *hw, u8 data) 5285 { 5286 int status; 5287 u16 handle; 5288 u8 i; 5289 5290 status = ice_get_pca9575_handle(hw, &handle); 5291 if (status) 5292 return status; 5293 5294 for (i = ICE_SMA_MIN_BIT; i <= ICE_SMA_MAX_BIT; i++) { 5295 bool pin; 5296 5297 pin = !(data & (1 << i)); 5298 status = ice_aq_set_gpio(hw, handle, i + ICE_PCA9575_P1_OFFSET, 5299 pin, NULL); 5300 if (status) 5301 break; 5302 } 5303 5304 return status; 5305 } 5306 5307 /** 5308 * ice_read_pca9575_reg 5309 * @hw: pointer to the hw struct 5310 * @offset: GPIO controller register offset 5311 * @data: pointer to data to be read from the GPIO controller 5312 * 5313 * Read the register from the GPIO controller 5314 */ 5315 int ice_read_pca9575_reg(struct ice_hw *hw, u8 offset, u8 *data) 5316 { 5317 struct ice_aqc_link_topo_addr link_topo; 5318 __le16 addr; 5319 u16 handle; 5320 int err; 5321 5322 memset(&link_topo, 0, sizeof(link_topo)); 5323 5324 err = ice_get_pca9575_handle(hw, &handle); 5325 if (err) 5326 return err; 5327 5328 link_topo.handle = cpu_to_le16(handle); 5329 link_topo.topo_params.node_type_ctx = 5330 FIELD_PREP(ICE_AQC_LINK_TOPO_NODE_CTX_M, 5331 ICE_AQC_LINK_TOPO_NODE_CTX_PROVIDED); 5332 5333 addr = cpu_to_le16((u16)offset); 5334 5335 return ice_aq_read_i2c(hw, link_topo, 0, addr, 1, data, NULL); 5336 } 5337 5338 /** 5339 * ice_ptp_read_sdp_ac - read SDP available connections section from NVM 5340 * @hw: pointer to the HW struct 5341 * @entries: returns the SDP available connections section from NVM 5342 * @num_entries: returns the number of valid entries 5343 * 5344 * Return: 0 on success, negative error code if NVM read failed or section does 5345 * not exist or is corrupted 5346 */ 5347 int ice_ptp_read_sdp_ac(struct ice_hw *hw, __le16 *entries, uint *num_entries) 5348 { 5349 __le16 data; 5350 u32 offset; 5351 int err; 5352 5353 err = ice_acquire_nvm(hw, ICE_RES_READ); 5354 if (err) 5355 goto exit; 5356 5357 /* Read the offset of SDP_AC */ 5358 offset = ICE_AQC_NVM_SDP_AC_PTR_OFFSET; 5359 err = ice_aq_read_nvm(hw, 0, offset, sizeof(data), &data, false, true, 5360 NULL); 5361 if (err) 5362 goto exit; 5363 5364 /* Check if section exist */ 5365 offset = FIELD_GET(ICE_AQC_NVM_SDP_AC_PTR_M, le16_to_cpu(data)); 5366 if (offset == ICE_AQC_NVM_SDP_AC_PTR_INVAL) { 5367 err = -EINVAL; 5368 goto exit; 5369 } 5370 5371 if (offset & ICE_AQC_NVM_SDP_AC_PTR_TYPE_M) { 5372 offset &= ICE_AQC_NVM_SDP_AC_PTR_M; 5373 offset *= ICE_AQC_NVM_SECTOR_UNIT; 5374 } else { 5375 offset *= sizeof(data); 5376 } 5377 5378 /* Skip reading section length and read the number of valid entries */ 5379 offset += sizeof(data); 5380 err = ice_aq_read_nvm(hw, 0, offset, sizeof(data), &data, false, true, 5381 NULL); 5382 if (err) 5383 goto exit; 5384 *num_entries = le16_to_cpu(data); 5385 5386 /* Read SDP configuration section */ 5387 offset += sizeof(data); 5388 err = ice_aq_read_nvm(hw, 0, offset, *num_entries * sizeof(data), 5389 entries, false, true, NULL); 5390 5391 exit: 5392 if (err) 5393 dev_dbg(ice_hw_to_dev(hw), "Failed to configure SDP connection section\n"); 5394 ice_release_nvm(hw); 5395 return err; 5396 } 5397 5398 /** 5399 * ice_ptp_init_phy_e810 - initialize PHY parameters 5400 * @ptp: pointer to the PTP HW struct 5401 */ 5402 static void ice_ptp_init_phy_e810(struct ice_ptp_hw *ptp) 5403 { 5404 ptp->phy_model = ICE_PHY_E810; 5405 ptp->num_lports = 8; 5406 ptp->ports_per_phy = 4; 5407 } 5408 5409 /* Device agnostic functions 5410 * 5411 * The following functions implement shared behavior common to both E822 and 5412 * E810 devices, possibly calling a device specific implementation where 5413 * necessary. 5414 */ 5415 5416 /** 5417 * ice_ptp_lock - Acquire PTP global semaphore register lock 5418 * @hw: pointer to the HW struct 5419 * 5420 * Acquire the global PTP hardware semaphore lock. Returns true if the lock 5421 * was acquired, false otherwise. 5422 * 5423 * The PFTSYN_SEM register sets the busy bit on read, returning the previous 5424 * value. If software sees the busy bit cleared, this means that this function 5425 * acquired the lock (and the busy bit is now set). If software sees the busy 5426 * bit set, it means that another function acquired the lock. 5427 * 5428 * Software must clear the busy bit with a write to release the lock for other 5429 * functions when done. 5430 */ 5431 bool ice_ptp_lock(struct ice_hw *hw) 5432 { 5433 u32 hw_lock; 5434 int i; 5435 5436 #define MAX_TRIES 15 5437 5438 for (i = 0; i < MAX_TRIES; i++) { 5439 hw_lock = rd32(hw, PFTSYN_SEM + (PFTSYN_SEM_BYTES * hw->pf_id)); 5440 hw_lock = hw_lock & PFTSYN_SEM_BUSY_M; 5441 if (hw_lock) { 5442 /* Somebody is holding the lock */ 5443 usleep_range(5000, 6000); 5444 continue; 5445 } 5446 5447 break; 5448 } 5449 5450 return !hw_lock; 5451 } 5452 5453 /** 5454 * ice_ptp_unlock - Release PTP global semaphore register lock 5455 * @hw: pointer to the HW struct 5456 * 5457 * Release the global PTP hardware semaphore lock. This is done by writing to 5458 * the PFTSYN_SEM register. 5459 */ 5460 void ice_ptp_unlock(struct ice_hw *hw) 5461 { 5462 wr32(hw, PFTSYN_SEM + (PFTSYN_SEM_BYTES * hw->pf_id), 0); 5463 } 5464 5465 /** 5466 * ice_ptp_init_hw - Initialize hw based on device type 5467 * @hw: pointer to the HW structure 5468 * 5469 * Determine the PHY model for the device, and initialize hw 5470 * for use by other functions. 5471 */ 5472 void ice_ptp_init_hw(struct ice_hw *hw) 5473 { 5474 struct ice_ptp_hw *ptp = &hw->ptp; 5475 5476 if (ice_is_e822(hw) || ice_is_e823(hw)) 5477 ice_ptp_init_phy_e82x(ptp); 5478 else if (ice_is_e810(hw)) 5479 ice_ptp_init_phy_e810(ptp); 5480 else if (ice_is_e825c(hw)) 5481 ice_ptp_init_phy_e825c(hw); 5482 else 5483 ptp->phy_model = ICE_PHY_UNSUP; 5484 } 5485 5486 /** 5487 * ice_ptp_write_port_cmd - Prepare a single PHY port for a timer command 5488 * @hw: pointer to HW struct 5489 * @port: Port to which cmd has to be sent 5490 * @cmd: Command to be sent to the port 5491 * 5492 * Prepare one port for the upcoming timer sync command. Do not use this for 5493 * programming only a single port, instead use ice_ptp_one_port_cmd() to 5494 * ensure non-modified ports get properly initialized to ICE_PTP_NOP. 5495 * 5496 * Return: 5497 * * %0 - success 5498 * %-EBUSY - PHY type not supported 5499 * * %other - failed to write port command 5500 */ 5501 static int ice_ptp_write_port_cmd(struct ice_hw *hw, u8 port, 5502 enum ice_ptp_tmr_cmd cmd) 5503 { 5504 switch (ice_get_phy_model(hw)) { 5505 case ICE_PHY_ETH56G: 5506 return ice_ptp_write_port_cmd_eth56g(hw, port, cmd); 5507 case ICE_PHY_E82X: 5508 return ice_ptp_write_port_cmd_e82x(hw, port, cmd); 5509 default: 5510 return -EOPNOTSUPP; 5511 } 5512 } 5513 5514 /** 5515 * ice_ptp_one_port_cmd - Program one PHY port for a timer command 5516 * @hw: pointer to HW struct 5517 * @configured_port: the port that should execute the command 5518 * @configured_cmd: the command to be executed on the configured port 5519 * 5520 * Prepare one port for executing a timer command, while preparing all other 5521 * ports to ICE_PTP_NOP. This allows executing a command on a single port 5522 * while ensuring all other ports do not execute stale commands. 5523 * 5524 * Return: 5525 * * %0 - success 5526 * * %other - failed to write port command 5527 */ 5528 int ice_ptp_one_port_cmd(struct ice_hw *hw, u8 configured_port, 5529 enum ice_ptp_tmr_cmd configured_cmd) 5530 { 5531 u32 port; 5532 5533 for (port = 0; port < hw->ptp.num_lports; port++) { 5534 int err; 5535 5536 /* Program the configured port with the configured command, 5537 * program all other ports with ICE_PTP_NOP. 5538 */ 5539 if (port == configured_port) 5540 err = ice_ptp_write_port_cmd(hw, port, configured_cmd); 5541 else 5542 err = ice_ptp_write_port_cmd(hw, port, ICE_PTP_NOP); 5543 5544 if (err) 5545 return err; 5546 } 5547 5548 return 0; 5549 } 5550 5551 /** 5552 * ice_ptp_port_cmd - Prepare PHY ports for a timer sync command 5553 * @hw: pointer to HW struct 5554 * @cmd: the timer command to setup 5555 * 5556 * Prepare all PHY ports on this device for the requested timer command. For 5557 * some families this can be done in one shot, but for other families each 5558 * port must be configured individually. 5559 * 5560 * Return: 5561 * * %0 - success 5562 * * %other - failed to write port command 5563 */ 5564 static int ice_ptp_port_cmd(struct ice_hw *hw, enum ice_ptp_tmr_cmd cmd) 5565 { 5566 u32 port; 5567 5568 /* PHY models which can program all ports simultaneously */ 5569 switch (ice_get_phy_model(hw)) { 5570 case ICE_PHY_E810: 5571 return ice_ptp_port_cmd_e810(hw, cmd); 5572 default: 5573 break; 5574 } 5575 5576 /* PHY models which require programming each port separately */ 5577 for (port = 0; port < hw->ptp.num_lports; port++) { 5578 int err; 5579 5580 err = ice_ptp_write_port_cmd(hw, port, cmd); 5581 if (err) 5582 return err; 5583 } 5584 5585 return 0; 5586 } 5587 5588 /** 5589 * ice_ptp_tmr_cmd - Prepare and trigger a timer sync command 5590 * @hw: pointer to HW struct 5591 * @cmd: the command to issue 5592 * 5593 * Prepare the source timer and PHY timers and then trigger the requested 5594 * command. This causes the shadow registers previously written in preparation 5595 * for the command to be synchronously applied to both the source and PHY 5596 * timers. 5597 */ 5598 static int ice_ptp_tmr_cmd(struct ice_hw *hw, enum ice_ptp_tmr_cmd cmd) 5599 { 5600 int err; 5601 5602 /* First, prepare the source timer */ 5603 ice_ptp_src_cmd(hw, cmd); 5604 5605 /* Next, prepare the ports */ 5606 err = ice_ptp_port_cmd(hw, cmd); 5607 if (err) { 5608 ice_debug(hw, ICE_DBG_PTP, "Failed to prepare PHY ports for timer command %u, err %d\n", 5609 cmd, err); 5610 return err; 5611 } 5612 5613 /* Write the sync command register to drive both source and PHY timer 5614 * commands synchronously 5615 */ 5616 ice_ptp_exec_tmr_cmd(hw); 5617 5618 return 0; 5619 } 5620 5621 /** 5622 * ice_ptp_init_time - Initialize device time to provided value 5623 * @hw: pointer to HW struct 5624 * @time: 64bits of time (GLTSYN_TIME_L and GLTSYN_TIME_H) 5625 * 5626 * Initialize the device to the specified time provided. This requires a three 5627 * step process: 5628 * 5629 * 1) write the new init time to the source timer shadow registers 5630 * 2) write the new init time to the PHY timer shadow registers 5631 * 3) issue an init_time timer command to synchronously switch both the source 5632 * and port timers to the new init time value at the next clock cycle. 5633 */ 5634 int ice_ptp_init_time(struct ice_hw *hw, u64 time) 5635 { 5636 u8 tmr_idx; 5637 int err; 5638 5639 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5640 5641 /* Source timers */ 5642 wr32(hw, GLTSYN_SHTIME_L(tmr_idx), lower_32_bits(time)); 5643 wr32(hw, GLTSYN_SHTIME_H(tmr_idx), upper_32_bits(time)); 5644 wr32(hw, GLTSYN_SHTIME_0(tmr_idx), 0); 5645 5646 /* PHY timers */ 5647 /* Fill Rx and Tx ports and send msg to PHY */ 5648 switch (ice_get_phy_model(hw)) { 5649 case ICE_PHY_ETH56G: 5650 err = ice_ptp_prep_phy_time_eth56g(hw, 5651 (u32)(time & 0xFFFFFFFF)); 5652 break; 5653 case ICE_PHY_E810: 5654 err = ice_ptp_prep_phy_time_e810(hw, time & 0xFFFFFFFF); 5655 break; 5656 case ICE_PHY_E82X: 5657 err = ice_ptp_prep_phy_time_e82x(hw, time & 0xFFFFFFFF); 5658 break; 5659 default: 5660 err = -EOPNOTSUPP; 5661 } 5662 5663 if (err) 5664 return err; 5665 5666 return ice_ptp_tmr_cmd(hw, ICE_PTP_INIT_TIME); 5667 } 5668 5669 /** 5670 * ice_ptp_write_incval - Program PHC with new increment value 5671 * @hw: pointer to HW struct 5672 * @incval: Source timer increment value per clock cycle 5673 * 5674 * Program the PHC with a new increment value. This requires a three-step 5675 * process: 5676 * 5677 * 1) Write the increment value to the source timer shadow registers 5678 * 2) Write the increment value to the PHY timer shadow registers 5679 * 3) Issue an ICE_PTP_INIT_INCVAL timer command to synchronously switch both 5680 * the source and port timers to the new increment value at the next clock 5681 * cycle. 5682 */ 5683 int ice_ptp_write_incval(struct ice_hw *hw, u64 incval) 5684 { 5685 u8 tmr_idx; 5686 int err; 5687 5688 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5689 5690 /* Shadow Adjust */ 5691 wr32(hw, GLTSYN_SHADJ_L(tmr_idx), lower_32_bits(incval)); 5692 wr32(hw, GLTSYN_SHADJ_H(tmr_idx), upper_32_bits(incval)); 5693 5694 switch (ice_get_phy_model(hw)) { 5695 case ICE_PHY_ETH56G: 5696 err = ice_ptp_prep_phy_incval_eth56g(hw, incval); 5697 break; 5698 case ICE_PHY_E810: 5699 err = ice_ptp_prep_phy_incval_e810(hw, incval); 5700 break; 5701 case ICE_PHY_E82X: 5702 err = ice_ptp_prep_phy_incval_e82x(hw, incval); 5703 break; 5704 default: 5705 err = -EOPNOTSUPP; 5706 } 5707 5708 if (err) 5709 return err; 5710 5711 return ice_ptp_tmr_cmd(hw, ICE_PTP_INIT_INCVAL); 5712 } 5713 5714 /** 5715 * ice_ptp_write_incval_locked - Program new incval while holding semaphore 5716 * @hw: pointer to HW struct 5717 * @incval: Source timer increment value per clock cycle 5718 * 5719 * Program a new PHC incval while holding the PTP semaphore. 5720 */ 5721 int ice_ptp_write_incval_locked(struct ice_hw *hw, u64 incval) 5722 { 5723 int err; 5724 5725 if (!ice_ptp_lock(hw)) 5726 return -EBUSY; 5727 5728 err = ice_ptp_write_incval(hw, incval); 5729 5730 ice_ptp_unlock(hw); 5731 5732 return err; 5733 } 5734 5735 /** 5736 * ice_ptp_adj_clock - Adjust PHC clock time atomically 5737 * @hw: pointer to HW struct 5738 * @adj: Adjustment in nanoseconds 5739 * 5740 * Perform an atomic adjustment of the PHC time by the specified number of 5741 * nanoseconds. This requires a three-step process: 5742 * 5743 * 1) Write the adjustment to the source timer shadow registers 5744 * 2) Write the adjustment to the PHY timer shadow registers 5745 * 3) Issue an ICE_PTP_ADJ_TIME timer command to synchronously apply the 5746 * adjustment to both the source and port timers at the next clock cycle. 5747 */ 5748 int ice_ptp_adj_clock(struct ice_hw *hw, s32 adj) 5749 { 5750 u8 tmr_idx; 5751 int err; 5752 5753 tmr_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5754 5755 /* Write the desired clock adjustment into the GLTSYN_SHADJ register. 5756 * For an ICE_PTP_ADJ_TIME command, this set of registers represents 5757 * the value to add to the clock time. It supports subtraction by 5758 * interpreting the value as a 2's complement integer. 5759 */ 5760 wr32(hw, GLTSYN_SHADJ_L(tmr_idx), 0); 5761 wr32(hw, GLTSYN_SHADJ_H(tmr_idx), adj); 5762 5763 switch (ice_get_phy_model(hw)) { 5764 case ICE_PHY_ETH56G: 5765 err = ice_ptp_prep_phy_adj_eth56g(hw, adj); 5766 break; 5767 case ICE_PHY_E810: 5768 err = ice_ptp_prep_phy_adj_e810(hw, adj); 5769 break; 5770 case ICE_PHY_E82X: 5771 err = ice_ptp_prep_phy_adj_e82x(hw, adj); 5772 break; 5773 default: 5774 err = -EOPNOTSUPP; 5775 } 5776 5777 if (err) 5778 return err; 5779 5780 return ice_ptp_tmr_cmd(hw, ICE_PTP_ADJ_TIME); 5781 } 5782 5783 /** 5784 * ice_read_phy_tstamp - Read a PHY timestamp from the timestamo block 5785 * @hw: pointer to the HW struct 5786 * @block: the block to read from 5787 * @idx: the timestamp index to read 5788 * @tstamp: on return, the 40bit timestamp value 5789 * 5790 * Read a 40bit timestamp value out of the timestamp block. For E822 devices, 5791 * the block is the quad to read from. For E810 devices, the block is the 5792 * logical port to read from. 5793 */ 5794 int ice_read_phy_tstamp(struct ice_hw *hw, u8 block, u8 idx, u64 *tstamp) 5795 { 5796 switch (ice_get_phy_model(hw)) { 5797 case ICE_PHY_ETH56G: 5798 return ice_read_ptp_tstamp_eth56g(hw, block, idx, tstamp); 5799 case ICE_PHY_E810: 5800 return ice_read_phy_tstamp_e810(hw, block, idx, tstamp); 5801 case ICE_PHY_E82X: 5802 return ice_read_phy_tstamp_e82x(hw, block, idx, tstamp); 5803 default: 5804 return -EOPNOTSUPP; 5805 } 5806 } 5807 5808 /** 5809 * ice_clear_phy_tstamp - Clear a timestamp from the timestamp block 5810 * @hw: pointer to the HW struct 5811 * @block: the block to read from 5812 * @idx: the timestamp index to reset 5813 * 5814 * Clear a timestamp from the timestamp block, discarding its value without 5815 * returning it. This resets the memory status bit for the timestamp index 5816 * allowing it to be reused for another timestamp in the future. 5817 * 5818 * For E822 devices, the block number is the PHY quad to clear from. For E810 5819 * devices, the block number is the logical port to clear from. 5820 * 5821 * This function must only be called on a timestamp index whose valid bit is 5822 * set according to ice_get_phy_tx_tstamp_ready(). 5823 */ 5824 int ice_clear_phy_tstamp(struct ice_hw *hw, u8 block, u8 idx) 5825 { 5826 switch (ice_get_phy_model(hw)) { 5827 case ICE_PHY_ETH56G: 5828 return ice_clear_ptp_tstamp_eth56g(hw, block, idx); 5829 case ICE_PHY_E810: 5830 return ice_clear_phy_tstamp_e810(hw, block, idx); 5831 case ICE_PHY_E82X: 5832 return ice_clear_phy_tstamp_e82x(hw, block, idx); 5833 default: 5834 return -EOPNOTSUPP; 5835 } 5836 } 5837 5838 /** 5839 * ice_get_pf_c827_idx - find and return the C827 index for the current pf 5840 * @hw: pointer to the hw struct 5841 * @idx: index of the found C827 PHY 5842 * Return: 5843 * * 0 - success 5844 * * negative - failure 5845 */ 5846 static int ice_get_pf_c827_idx(struct ice_hw *hw, u8 *idx) 5847 { 5848 struct ice_aqc_get_link_topo cmd; 5849 u8 node_part_number; 5850 u16 node_handle; 5851 int status; 5852 u8 ctx; 5853 5854 if (hw->mac_type != ICE_MAC_E810) 5855 return -ENODEV; 5856 5857 if (hw->device_id != ICE_DEV_ID_E810C_QSFP) { 5858 *idx = C827_0; 5859 return 0; 5860 } 5861 5862 memset(&cmd, 0, sizeof(cmd)); 5863 5864 ctx = ICE_AQC_LINK_TOPO_NODE_TYPE_PHY << ICE_AQC_LINK_TOPO_NODE_TYPE_S; 5865 ctx |= ICE_AQC_LINK_TOPO_NODE_CTX_PORT << ICE_AQC_LINK_TOPO_NODE_CTX_S; 5866 cmd.addr.topo_params.node_type_ctx = ctx; 5867 5868 status = ice_aq_get_netlist_node(hw, &cmd, &node_part_number, 5869 &node_handle); 5870 if (status || node_part_number != ICE_AQC_GET_LINK_TOPO_NODE_NR_C827) 5871 return -ENOENT; 5872 5873 if (node_handle == E810C_QSFP_C827_0_HANDLE) 5874 *idx = C827_0; 5875 else if (node_handle == E810C_QSFP_C827_1_HANDLE) 5876 *idx = C827_1; 5877 else 5878 return -EIO; 5879 5880 return 0; 5881 } 5882 5883 /** 5884 * ice_ptp_reset_ts_memory - Reset timestamp memory for all blocks 5885 * @hw: pointer to the HW struct 5886 */ 5887 void ice_ptp_reset_ts_memory(struct ice_hw *hw) 5888 { 5889 switch (ice_get_phy_model(hw)) { 5890 case ICE_PHY_ETH56G: 5891 ice_ptp_reset_ts_memory_eth56g(hw); 5892 break; 5893 case ICE_PHY_E82X: 5894 ice_ptp_reset_ts_memory_e82x(hw); 5895 break; 5896 case ICE_PHY_E810: 5897 default: 5898 return; 5899 } 5900 } 5901 5902 /** 5903 * ice_ptp_init_phc - Initialize PTP hardware clock 5904 * @hw: pointer to the HW struct 5905 * 5906 * Perform the steps required to initialize the PTP hardware clock. 5907 */ 5908 int ice_ptp_init_phc(struct ice_hw *hw) 5909 { 5910 u8 src_idx = hw->func_caps.ts_func_info.tmr_index_owned; 5911 5912 /* Enable source clocks */ 5913 wr32(hw, GLTSYN_ENA(src_idx), GLTSYN_ENA_TSYN_ENA_M); 5914 5915 /* Clear event err indications for auxiliary pins */ 5916 (void)rd32(hw, GLTSYN_STAT(src_idx)); 5917 5918 switch (ice_get_phy_model(hw)) { 5919 case ICE_PHY_ETH56G: 5920 return ice_ptp_init_phc_eth56g(hw); 5921 case ICE_PHY_E810: 5922 return ice_ptp_init_phc_e810(hw); 5923 case ICE_PHY_E82X: 5924 return ice_ptp_init_phc_e82x(hw); 5925 default: 5926 return -EOPNOTSUPP; 5927 } 5928 } 5929 5930 /** 5931 * ice_get_phy_tx_tstamp_ready - Read PHY Tx memory status indication 5932 * @hw: pointer to the HW struct 5933 * @block: the timestamp block to check 5934 * @tstamp_ready: storage for the PHY Tx memory status information 5935 * 5936 * Check the PHY for Tx timestamp memory status. This reports a 64 bit value 5937 * which indicates which timestamps in the block may be captured. A set bit 5938 * means the timestamp can be read. An unset bit means the timestamp is not 5939 * ready and software should avoid reading the register. 5940 */ 5941 int ice_get_phy_tx_tstamp_ready(struct ice_hw *hw, u8 block, u64 *tstamp_ready) 5942 { 5943 switch (ice_get_phy_model(hw)) { 5944 case ICE_PHY_ETH56G: 5945 return ice_get_phy_tx_tstamp_ready_eth56g(hw, block, 5946 tstamp_ready); 5947 case ICE_PHY_E810: 5948 return ice_get_phy_tx_tstamp_ready_e810(hw, block, 5949 tstamp_ready); 5950 case ICE_PHY_E82X: 5951 return ice_get_phy_tx_tstamp_ready_e82x(hw, block, 5952 tstamp_ready); 5953 break; 5954 default: 5955 return -EOPNOTSUPP; 5956 } 5957 } 5958 5959 /** 5960 * ice_cgu_get_pin_desc_e823 - get pin description array 5961 * @hw: pointer to the hw struct 5962 * @input: if request is done against input or output pin 5963 * @size: number of inputs/outputs 5964 * 5965 * Return: pointer to pin description array associated to given hw. 5966 */ 5967 static const struct ice_cgu_pin_desc * 5968 ice_cgu_get_pin_desc_e823(struct ice_hw *hw, bool input, int *size) 5969 { 5970 static const struct ice_cgu_pin_desc *t; 5971 5972 if (hw->cgu_part_number == 5973 ICE_AQC_GET_LINK_TOPO_NODE_NR_ZL30632_80032) { 5974 if (input) { 5975 t = ice_e823_zl_cgu_inputs; 5976 *size = ARRAY_SIZE(ice_e823_zl_cgu_inputs); 5977 } else { 5978 t = ice_e823_zl_cgu_outputs; 5979 *size = ARRAY_SIZE(ice_e823_zl_cgu_outputs); 5980 } 5981 } else if (hw->cgu_part_number == 5982 ICE_AQC_GET_LINK_TOPO_NODE_NR_SI5383_5384) { 5983 if (input) { 5984 t = ice_e823_si_cgu_inputs; 5985 *size = ARRAY_SIZE(ice_e823_si_cgu_inputs); 5986 } else { 5987 t = ice_e823_si_cgu_outputs; 5988 *size = ARRAY_SIZE(ice_e823_si_cgu_outputs); 5989 } 5990 } else { 5991 t = NULL; 5992 *size = 0; 5993 } 5994 5995 return t; 5996 } 5997 5998 /** 5999 * ice_cgu_get_pin_desc - get pin description array 6000 * @hw: pointer to the hw struct 6001 * @input: if request is done against input or output pins 6002 * @size: size of array returned by function 6003 * 6004 * Return: pointer to pin description array associated to given hw. 6005 */ 6006 static const struct ice_cgu_pin_desc * 6007 ice_cgu_get_pin_desc(struct ice_hw *hw, bool input, int *size) 6008 { 6009 const struct ice_cgu_pin_desc *t = NULL; 6010 6011 switch (hw->device_id) { 6012 case ICE_DEV_ID_E810C_SFP: 6013 if (input) { 6014 t = ice_e810t_sfp_cgu_inputs; 6015 *size = ARRAY_SIZE(ice_e810t_sfp_cgu_inputs); 6016 } else { 6017 t = ice_e810t_sfp_cgu_outputs; 6018 *size = ARRAY_SIZE(ice_e810t_sfp_cgu_outputs); 6019 } 6020 break; 6021 case ICE_DEV_ID_E810C_QSFP: 6022 if (input) { 6023 t = ice_e810t_qsfp_cgu_inputs; 6024 *size = ARRAY_SIZE(ice_e810t_qsfp_cgu_inputs); 6025 } else { 6026 t = ice_e810t_qsfp_cgu_outputs; 6027 *size = ARRAY_SIZE(ice_e810t_qsfp_cgu_outputs); 6028 } 6029 break; 6030 case ICE_DEV_ID_E823L_10G_BASE_T: 6031 case ICE_DEV_ID_E823L_1GBE: 6032 case ICE_DEV_ID_E823L_BACKPLANE: 6033 case ICE_DEV_ID_E823L_QSFP: 6034 case ICE_DEV_ID_E823L_SFP: 6035 case ICE_DEV_ID_E823C_10G_BASE_T: 6036 case ICE_DEV_ID_E823C_BACKPLANE: 6037 case ICE_DEV_ID_E823C_QSFP: 6038 case ICE_DEV_ID_E823C_SFP: 6039 case ICE_DEV_ID_E823C_SGMII: 6040 t = ice_cgu_get_pin_desc_e823(hw, input, size); 6041 break; 6042 default: 6043 break; 6044 } 6045 6046 return t; 6047 } 6048 6049 /** 6050 * ice_cgu_get_num_pins - get pin description array size 6051 * @hw: pointer to the hw struct 6052 * @input: if request is done against input or output pins 6053 * 6054 * Return: size of pin description array for given hw. 6055 */ 6056 int ice_cgu_get_num_pins(struct ice_hw *hw, bool input) 6057 { 6058 const struct ice_cgu_pin_desc *t; 6059 int size; 6060 6061 t = ice_cgu_get_pin_desc(hw, input, &size); 6062 if (t) 6063 return size; 6064 6065 return 0; 6066 } 6067 6068 /** 6069 * ice_cgu_get_pin_type - get pin's type 6070 * @hw: pointer to the hw struct 6071 * @pin: pin index 6072 * @input: if request is done against input or output pin 6073 * 6074 * Return: type of a pin. 6075 */ 6076 enum dpll_pin_type ice_cgu_get_pin_type(struct ice_hw *hw, u8 pin, bool input) 6077 { 6078 const struct ice_cgu_pin_desc *t; 6079 int t_size; 6080 6081 t = ice_cgu_get_pin_desc(hw, input, &t_size); 6082 6083 if (!t) 6084 return 0; 6085 6086 if (pin >= t_size) 6087 return 0; 6088 6089 return t[pin].type; 6090 } 6091 6092 /** 6093 * ice_cgu_get_pin_freq_supp - get pin's supported frequency 6094 * @hw: pointer to the hw struct 6095 * @pin: pin index 6096 * @input: if request is done against input or output pin 6097 * @num: output number of supported frequencies 6098 * 6099 * Get frequency supported number and array of supported frequencies. 6100 * 6101 * Return: array of supported frequencies for given pin. 6102 */ 6103 struct dpll_pin_frequency * 6104 ice_cgu_get_pin_freq_supp(struct ice_hw *hw, u8 pin, bool input, u8 *num) 6105 { 6106 const struct ice_cgu_pin_desc *t; 6107 int t_size; 6108 6109 *num = 0; 6110 t = ice_cgu_get_pin_desc(hw, input, &t_size); 6111 if (!t) 6112 return NULL; 6113 if (pin >= t_size) 6114 return NULL; 6115 *num = t[pin].freq_supp_num; 6116 6117 return t[pin].freq_supp; 6118 } 6119 6120 /** 6121 * ice_cgu_get_pin_name - get pin's name 6122 * @hw: pointer to the hw struct 6123 * @pin: pin index 6124 * @input: if request is done against input or output pin 6125 * 6126 * Return: 6127 * * null terminated char array with name 6128 * * NULL in case of failure 6129 */ 6130 const char *ice_cgu_get_pin_name(struct ice_hw *hw, u8 pin, bool input) 6131 { 6132 const struct ice_cgu_pin_desc *t; 6133 int t_size; 6134 6135 t = ice_cgu_get_pin_desc(hw, input, &t_size); 6136 6137 if (!t) 6138 return NULL; 6139 6140 if (pin >= t_size) 6141 return NULL; 6142 6143 return t[pin].name; 6144 } 6145 6146 /** 6147 * ice_get_cgu_state - get the state of the DPLL 6148 * @hw: pointer to the hw struct 6149 * @dpll_idx: Index of internal DPLL unit 6150 * @last_dpll_state: last known state of DPLL 6151 * @pin: pointer to a buffer for returning currently active pin 6152 * @ref_state: reference clock state 6153 * @eec_mode: eec mode of the DPLL 6154 * @phase_offset: pointer to a buffer for returning phase offset 6155 * @dpll_state: state of the DPLL (output) 6156 * 6157 * This function will read the state of the DPLL(dpll_idx). Non-null 6158 * 'pin', 'ref_state', 'eec_mode' and 'phase_offset' parameters are used to 6159 * retrieve currently active pin, state, mode and phase_offset respectively. 6160 * 6161 * Return: state of the DPLL 6162 */ 6163 int ice_get_cgu_state(struct ice_hw *hw, u8 dpll_idx, 6164 enum dpll_lock_status last_dpll_state, u8 *pin, 6165 u8 *ref_state, u8 *eec_mode, s64 *phase_offset, 6166 enum dpll_lock_status *dpll_state) 6167 { 6168 u8 hw_ref_state, hw_dpll_state, hw_eec_mode, hw_config; 6169 s64 hw_phase_offset; 6170 int status; 6171 6172 status = ice_aq_get_cgu_dpll_status(hw, dpll_idx, &hw_ref_state, 6173 &hw_dpll_state, &hw_config, 6174 &hw_phase_offset, &hw_eec_mode); 6175 if (status) 6176 return status; 6177 6178 if (pin) 6179 /* current ref pin in dpll_state_refsel_status_X register */ 6180 *pin = hw_config & ICE_AQC_GET_CGU_DPLL_CONFIG_CLK_REF_SEL; 6181 if (phase_offset) 6182 *phase_offset = hw_phase_offset; 6183 if (ref_state) 6184 *ref_state = hw_ref_state; 6185 if (eec_mode) 6186 *eec_mode = hw_eec_mode; 6187 if (!dpll_state) 6188 return 0; 6189 6190 /* According to ZL DPLL documentation, once state reach LOCKED_HO_ACQ 6191 * it would never return to FREERUN. This aligns to ITU-T G.781 6192 * Recommendation. We cannot report HOLDOVER as HO memory is cleared 6193 * while switching to another reference. 6194 * Only for situations where previous state was either: "LOCKED without 6195 * HO_ACQ" or "HOLDOVER" we actually back to FREERUN. 6196 */ 6197 if (hw_dpll_state & ICE_AQC_GET_CGU_DPLL_STATUS_STATE_LOCK) { 6198 if (hw_dpll_state & ICE_AQC_GET_CGU_DPLL_STATUS_STATE_HO_READY) 6199 *dpll_state = DPLL_LOCK_STATUS_LOCKED_HO_ACQ; 6200 else 6201 *dpll_state = DPLL_LOCK_STATUS_LOCKED; 6202 } else if (last_dpll_state == DPLL_LOCK_STATUS_LOCKED_HO_ACQ || 6203 last_dpll_state == DPLL_LOCK_STATUS_HOLDOVER) { 6204 *dpll_state = DPLL_LOCK_STATUS_HOLDOVER; 6205 } else { 6206 *dpll_state = DPLL_LOCK_STATUS_UNLOCKED; 6207 } 6208 6209 return 0; 6210 } 6211 6212 /** 6213 * ice_get_cgu_rclk_pin_info - get info on available recovered clock pins 6214 * @hw: pointer to the hw struct 6215 * @base_idx: returns index of first recovered clock pin on device 6216 * @pin_num: returns number of recovered clock pins available on device 6217 * 6218 * Based on hw provide caller info about recovery clock pins available on the 6219 * board. 6220 * 6221 * Return: 6222 * * 0 - success, information is valid 6223 * * negative - failure, information is not valid 6224 */ 6225 int ice_get_cgu_rclk_pin_info(struct ice_hw *hw, u8 *base_idx, u8 *pin_num) 6226 { 6227 u8 phy_idx; 6228 int ret; 6229 6230 switch (hw->device_id) { 6231 case ICE_DEV_ID_E810C_SFP: 6232 case ICE_DEV_ID_E810C_QSFP: 6233 6234 ret = ice_get_pf_c827_idx(hw, &phy_idx); 6235 if (ret) 6236 return ret; 6237 *base_idx = E810T_CGU_INPUT_C827(phy_idx, ICE_RCLKA_PIN); 6238 *pin_num = ICE_E810_RCLK_PINS_NUM; 6239 ret = 0; 6240 break; 6241 case ICE_DEV_ID_E823L_10G_BASE_T: 6242 case ICE_DEV_ID_E823L_1GBE: 6243 case ICE_DEV_ID_E823L_BACKPLANE: 6244 case ICE_DEV_ID_E823L_QSFP: 6245 case ICE_DEV_ID_E823L_SFP: 6246 case ICE_DEV_ID_E823C_10G_BASE_T: 6247 case ICE_DEV_ID_E823C_BACKPLANE: 6248 case ICE_DEV_ID_E823C_QSFP: 6249 case ICE_DEV_ID_E823C_SFP: 6250 case ICE_DEV_ID_E823C_SGMII: 6251 *pin_num = ICE_E82X_RCLK_PINS_NUM; 6252 ret = 0; 6253 if (hw->cgu_part_number == 6254 ICE_AQC_GET_LINK_TOPO_NODE_NR_ZL30632_80032) 6255 *base_idx = ZL_REF1P; 6256 else if (hw->cgu_part_number == 6257 ICE_AQC_GET_LINK_TOPO_NODE_NR_SI5383_5384) 6258 *base_idx = SI_REF1P; 6259 else 6260 ret = -ENODEV; 6261 6262 break; 6263 default: 6264 ret = -ENODEV; 6265 break; 6266 } 6267 6268 return ret; 6269 } 6270 6271 /** 6272 * ice_cgu_get_output_pin_state_caps - get output pin state capabilities 6273 * @hw: pointer to the hw struct 6274 * @pin_id: id of a pin 6275 * @caps: capabilities to modify 6276 * 6277 * Return: 6278 * * 0 - success, state capabilities were modified 6279 * * negative - failure, capabilities were not modified 6280 */ 6281 int ice_cgu_get_output_pin_state_caps(struct ice_hw *hw, u8 pin_id, 6282 unsigned long *caps) 6283 { 6284 bool can_change = true; 6285 6286 switch (hw->device_id) { 6287 case ICE_DEV_ID_E810C_SFP: 6288 if (pin_id == ZL_OUT2 || pin_id == ZL_OUT3) 6289 can_change = false; 6290 break; 6291 case ICE_DEV_ID_E810C_QSFP: 6292 if (pin_id == ZL_OUT2 || pin_id == ZL_OUT3 || pin_id == ZL_OUT4) 6293 can_change = false; 6294 break; 6295 case ICE_DEV_ID_E823L_10G_BASE_T: 6296 case ICE_DEV_ID_E823L_1GBE: 6297 case ICE_DEV_ID_E823L_BACKPLANE: 6298 case ICE_DEV_ID_E823L_QSFP: 6299 case ICE_DEV_ID_E823L_SFP: 6300 case ICE_DEV_ID_E823C_10G_BASE_T: 6301 case ICE_DEV_ID_E823C_BACKPLANE: 6302 case ICE_DEV_ID_E823C_QSFP: 6303 case ICE_DEV_ID_E823C_SFP: 6304 case ICE_DEV_ID_E823C_SGMII: 6305 if (hw->cgu_part_number == 6306 ICE_AQC_GET_LINK_TOPO_NODE_NR_ZL30632_80032 && 6307 pin_id == ZL_OUT2) 6308 can_change = false; 6309 else if (hw->cgu_part_number == 6310 ICE_AQC_GET_LINK_TOPO_NODE_NR_SI5383_5384 && 6311 pin_id == SI_OUT1) 6312 can_change = false; 6313 break; 6314 default: 6315 return -EINVAL; 6316 } 6317 if (can_change) 6318 *caps |= DPLL_PIN_CAPABILITIES_STATE_CAN_CHANGE; 6319 else 6320 *caps &= ~DPLL_PIN_CAPABILITIES_STATE_CAN_CHANGE; 6321 6322 return 0; 6323 } 6324