1 /* Broadcom NetXtreme-C/E network driver. 2 * 3 * Copyright (c) 2021 Broadcom Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation. 8 */ 9 #include <linux/kernel.h> 10 #include <linux/errno.h> 11 #include <linux/pci.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/net_tstamp.h> 15 #include <linux/timekeeping.h> 16 #include <linux/ptp_classify.h> 17 #include <linux/clocksource.h> 18 #include "bnxt_hsi.h" 19 #include "bnxt.h" 20 #include "bnxt_hwrm.h" 21 #include "bnxt_ptp.h" 22 23 static int bnxt_ptp_cfg_settime(struct bnxt *bp, u64 time) 24 { 25 struct hwrm_func_ptp_cfg_input *req; 26 int rc; 27 28 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 29 if (rc) 30 return rc; 31 32 req->enables = cpu_to_le16(FUNC_PTP_CFG_REQ_ENABLES_PTP_SET_TIME); 33 req->ptp_set_time = cpu_to_le64(time); 34 return hwrm_req_send(bp, req); 35 } 36 37 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off) 38 { 39 unsigned int ptp_class; 40 struct ptp_header *hdr; 41 42 ptp_class = ptp_classify_raw(skb); 43 44 switch (ptp_class & PTP_CLASS_VMASK) { 45 case PTP_CLASS_V1: 46 case PTP_CLASS_V2: 47 hdr = ptp_parse_header(skb, ptp_class); 48 if (!hdr) 49 return -EINVAL; 50 51 *hdr_off = (u8 *)hdr - skb->data; 52 *seq_id = ntohs(hdr->sequence_id); 53 return 0; 54 default: 55 return -ERANGE; 56 } 57 } 58 59 static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info, 60 const struct timespec64 *ts) 61 { 62 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 63 ptp_info); 64 u64 ns = timespec64_to_ns(ts); 65 66 if (BNXT_PTP_USE_RTC(ptp->bp)) 67 return bnxt_ptp_cfg_settime(ptp->bp, ns); 68 69 spin_lock_bh(&ptp->ptp_lock); 70 timecounter_init(&ptp->tc, &ptp->cc, ns); 71 spin_unlock_bh(&ptp->ptp_lock); 72 return 0; 73 } 74 75 /* Caller holds ptp_lock */ 76 static int bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts, 77 u64 *ns) 78 { 79 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 80 u32 high_before, high_now, low; 81 82 if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) 83 return -EIO; 84 85 high_before = readl(bp->bar0 + ptp->refclk_mapped_regs[1]); 86 ptp_read_system_prets(sts); 87 low = readl(bp->bar0 + ptp->refclk_mapped_regs[0]); 88 ptp_read_system_postts(sts); 89 high_now = readl(bp->bar0 + ptp->refclk_mapped_regs[1]); 90 if (high_now != high_before) { 91 ptp_read_system_prets(sts); 92 low = readl(bp->bar0 + ptp->refclk_mapped_regs[0]); 93 ptp_read_system_postts(sts); 94 } 95 *ns = ((u64)high_now << 32) | low; 96 97 return 0; 98 } 99 100 static void bnxt_ptp_get_current_time(struct bnxt *bp) 101 { 102 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 103 104 if (!ptp) 105 return; 106 spin_lock_bh(&ptp->ptp_lock); 107 WRITE_ONCE(ptp->old_time, ptp->current_time); 108 bnxt_refclk_read(bp, NULL, &ptp->current_time); 109 spin_unlock_bh(&ptp->ptp_lock); 110 } 111 112 static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts) 113 { 114 struct hwrm_port_ts_query_output *resp; 115 struct hwrm_port_ts_query_input *req; 116 int rc; 117 118 rc = hwrm_req_init(bp, req, HWRM_PORT_TS_QUERY); 119 if (rc) 120 return rc; 121 122 req->flags = cpu_to_le32(flags); 123 if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) == 124 PORT_TS_QUERY_REQ_FLAGS_PATH_TX) { 125 req->enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES); 126 req->ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid); 127 req->ptp_hdr_offset = cpu_to_le16(bp->ptp_cfg->tx_hdr_off); 128 req->ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT); 129 } 130 resp = hwrm_req_hold(bp, req); 131 132 rc = hwrm_req_send(bp, req); 133 if (!rc) 134 *ts = le64_to_cpu(resp->ptp_msg_ts); 135 hwrm_req_drop(bp, req); 136 return rc; 137 } 138 139 static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info, 140 struct timespec64 *ts, 141 struct ptp_system_timestamp *sts) 142 { 143 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 144 ptp_info); 145 u64 ns, cycles; 146 int rc; 147 148 spin_lock_bh(&ptp->ptp_lock); 149 rc = bnxt_refclk_read(ptp->bp, sts, &cycles); 150 if (rc) { 151 spin_unlock_bh(&ptp->ptp_lock); 152 return rc; 153 } 154 ns = timecounter_cyc2time(&ptp->tc, cycles); 155 spin_unlock_bh(&ptp->ptp_lock); 156 *ts = ns_to_timespec64(ns); 157 158 return 0; 159 } 160 161 /* Caller holds ptp_lock */ 162 void bnxt_ptp_update_current_time(struct bnxt *bp) 163 { 164 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 165 166 bnxt_refclk_read(ptp->bp, NULL, &ptp->current_time); 167 WRITE_ONCE(ptp->old_time, ptp->current_time); 168 } 169 170 static int bnxt_ptp_adjphc(struct bnxt_ptp_cfg *ptp, s64 delta) 171 { 172 struct hwrm_port_mac_cfg_input *req; 173 int rc; 174 175 rc = hwrm_req_init(ptp->bp, req, HWRM_PORT_MAC_CFG); 176 if (rc) 177 return rc; 178 179 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_ADJ_PHASE); 180 req->ptp_adj_phase = cpu_to_le64(delta); 181 182 rc = hwrm_req_send(ptp->bp, req); 183 if (rc) { 184 netdev_err(ptp->bp->dev, "ptp adjphc failed. rc = %x\n", rc); 185 } else { 186 spin_lock_bh(&ptp->ptp_lock); 187 bnxt_ptp_update_current_time(ptp->bp); 188 spin_unlock_bh(&ptp->ptp_lock); 189 } 190 191 return rc; 192 } 193 194 static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta) 195 { 196 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 197 ptp_info); 198 199 if (BNXT_PTP_USE_RTC(ptp->bp)) 200 return bnxt_ptp_adjphc(ptp, delta); 201 202 spin_lock_bh(&ptp->ptp_lock); 203 timecounter_adjtime(&ptp->tc, delta); 204 spin_unlock_bh(&ptp->ptp_lock); 205 return 0; 206 } 207 208 static int bnxt_ptp_adjfine_rtc(struct bnxt *bp, long scaled_ppm) 209 { 210 s32 ppb = scaled_ppm_to_ppb(scaled_ppm); 211 struct hwrm_port_mac_cfg_input *req; 212 int rc; 213 214 rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG); 215 if (rc) 216 return rc; 217 218 req->ptp_freq_adj_ppb = cpu_to_le32(ppb); 219 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB); 220 rc = hwrm_req_send(bp, req); 221 if (rc) 222 netdev_err(bp->dev, 223 "ptp adjfine failed. rc = %d\n", rc); 224 return rc; 225 } 226 227 static int bnxt_ptp_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm) 228 { 229 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 230 ptp_info); 231 struct bnxt *bp = ptp->bp; 232 233 if (!BNXT_MH(bp)) 234 return bnxt_ptp_adjfine_rtc(bp, scaled_ppm); 235 236 spin_lock_bh(&ptp->ptp_lock); 237 timecounter_read(&ptp->tc); 238 ptp->cc.mult = adjust_by_scaled_ppm(ptp->cmult, scaled_ppm); 239 spin_unlock_bh(&ptp->ptp_lock); 240 return 0; 241 } 242 243 void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2) 244 { 245 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 246 struct ptp_clock_event event; 247 u64 ns, pps_ts; 248 249 pps_ts = EVENT_PPS_TS(data2, data1); 250 spin_lock_bh(&ptp->ptp_lock); 251 ns = timecounter_cyc2time(&ptp->tc, pps_ts); 252 spin_unlock_bh(&ptp->ptp_lock); 253 254 switch (EVENT_DATA2_PPS_EVENT_TYPE(data2)) { 255 case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_INTERNAL: 256 event.pps_times.ts_real = ns_to_timespec64(ns); 257 event.type = PTP_CLOCK_PPSUSR; 258 event.index = EVENT_DATA2_PPS_PIN_NUM(data2); 259 break; 260 case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_EXTERNAL: 261 event.timestamp = ns; 262 event.type = PTP_CLOCK_EXTTS; 263 event.index = EVENT_DATA2_PPS_PIN_NUM(data2); 264 break; 265 } 266 267 ptp_clock_event(bp->ptp_cfg->ptp_clock, &event); 268 } 269 270 static int bnxt_ptp_cfg_pin(struct bnxt *bp, u8 pin, u8 usage) 271 { 272 struct hwrm_func_ptp_pin_cfg_input *req; 273 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 274 u8 state = usage != BNXT_PPS_PIN_NONE; 275 u8 *pin_state, *pin_usg; 276 u32 enables; 277 int rc; 278 279 if (!TSIO_PIN_VALID(pin)) { 280 netdev_err(ptp->bp->dev, "1PPS: Invalid pin. Check pin-function configuration\n"); 281 return -EOPNOTSUPP; 282 } 283 284 rc = hwrm_req_init(ptp->bp, req, HWRM_FUNC_PTP_PIN_CFG); 285 if (rc) 286 return rc; 287 288 enables = (FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_STATE | 289 FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_USAGE) << (pin * 2); 290 req->enables = cpu_to_le32(enables); 291 292 pin_state = &req->pin0_state; 293 pin_usg = &req->pin0_usage; 294 295 *(pin_state + (pin * 2)) = state; 296 *(pin_usg + (pin * 2)) = usage; 297 298 rc = hwrm_req_send(ptp->bp, req); 299 if (rc) 300 return rc; 301 302 ptp->pps_info.pins[pin].usage = usage; 303 ptp->pps_info.pins[pin].state = state; 304 305 return 0; 306 } 307 308 static int bnxt_ptp_cfg_event(struct bnxt *bp, u8 event) 309 { 310 struct hwrm_func_ptp_cfg_input *req; 311 int rc; 312 313 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 314 if (rc) 315 return rc; 316 317 req->enables = cpu_to_le16(FUNC_PTP_CFG_REQ_ENABLES_PTP_PPS_EVENT); 318 req->ptp_pps_event = event; 319 return hwrm_req_send(bp, req); 320 } 321 322 void bnxt_ptp_cfg_tstamp_filters(struct bnxt *bp) 323 { 324 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 325 struct hwrm_port_mac_cfg_input *req; 326 327 if (!ptp || !ptp->tstamp_filters) 328 return; 329 330 if (hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG)) 331 goto out; 332 333 if (!(bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) && (ptp->tstamp_filters & 334 (PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE | 335 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE))) { 336 ptp->tstamp_filters &= ~(PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE | 337 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE); 338 netdev_warn(bp->dev, "Unsupported FW for all RX pkts timestamp filter\n"); 339 } 340 341 req->flags = cpu_to_le32(ptp->tstamp_filters); 342 req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE); 343 req->rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl); 344 345 if (!hwrm_req_send(bp, req)) { 346 bp->ptp_all_rx_tstamp = !!(ptp->tstamp_filters & 347 PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE); 348 return; 349 } 350 ptp->tstamp_filters = 0; 351 out: 352 bp->ptp_all_rx_tstamp = 0; 353 netdev_warn(bp->dev, "Failed to configure HW packet timestamp filters\n"); 354 } 355 356 void bnxt_ptp_reapply_pps(struct bnxt *bp) 357 { 358 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 359 struct bnxt_pps *pps; 360 u32 pin = 0; 361 int rc; 362 363 if (!ptp || !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) || 364 !(ptp->ptp_info.pin_config)) 365 return; 366 pps = &ptp->pps_info; 367 for (pin = 0; pin < BNXT_MAX_TSIO_PINS; pin++) { 368 if (pps->pins[pin].state) { 369 rc = bnxt_ptp_cfg_pin(bp, pin, pps->pins[pin].usage); 370 if (!rc && pps->pins[pin].event) 371 rc = bnxt_ptp_cfg_event(bp, 372 pps->pins[pin].event); 373 if (rc) 374 netdev_err(bp->dev, "1PPS: Failed to configure pin%d\n", 375 pin); 376 } 377 } 378 } 379 380 static int bnxt_get_target_cycles(struct bnxt_ptp_cfg *ptp, u64 target_ns, 381 u64 *cycles_delta) 382 { 383 u64 cycles_now; 384 u64 nsec_now, nsec_delta; 385 int rc; 386 387 spin_lock_bh(&ptp->ptp_lock); 388 rc = bnxt_refclk_read(ptp->bp, NULL, &cycles_now); 389 if (rc) { 390 spin_unlock_bh(&ptp->ptp_lock); 391 return rc; 392 } 393 nsec_now = timecounter_cyc2time(&ptp->tc, cycles_now); 394 spin_unlock_bh(&ptp->ptp_lock); 395 396 nsec_delta = target_ns - nsec_now; 397 *cycles_delta = div64_u64(nsec_delta << ptp->cc.shift, ptp->cc.mult); 398 return 0; 399 } 400 401 static int bnxt_ptp_perout_cfg(struct bnxt_ptp_cfg *ptp, 402 struct ptp_clock_request *rq) 403 { 404 struct hwrm_func_ptp_cfg_input *req; 405 struct bnxt *bp = ptp->bp; 406 struct timespec64 ts; 407 u64 target_ns, delta; 408 u16 enables; 409 int rc; 410 411 ts.tv_sec = rq->perout.start.sec; 412 ts.tv_nsec = rq->perout.start.nsec; 413 target_ns = timespec64_to_ns(&ts); 414 415 rc = bnxt_get_target_cycles(ptp, target_ns, &delta); 416 if (rc) 417 return rc; 418 419 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_CFG); 420 if (rc) 421 return rc; 422 423 enables = FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PERIOD | 424 FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_UP | 425 FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PHASE; 426 req->enables = cpu_to_le16(enables); 427 req->ptp_pps_event = 0; 428 req->ptp_freq_adj_dll_source = 0; 429 req->ptp_freq_adj_dll_phase = 0; 430 req->ptp_freq_adj_ext_period = cpu_to_le32(NSEC_PER_SEC); 431 req->ptp_freq_adj_ext_up = 0; 432 req->ptp_freq_adj_ext_phase_lower = cpu_to_le32(delta); 433 434 return hwrm_req_send(bp, req); 435 } 436 437 static int bnxt_ptp_enable(struct ptp_clock_info *ptp_info, 438 struct ptp_clock_request *rq, int on) 439 { 440 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 441 ptp_info); 442 struct bnxt *bp = ptp->bp; 443 int pin_id; 444 int rc; 445 446 switch (rq->type) { 447 case PTP_CLK_REQ_EXTTS: 448 /* Configure an External PPS IN */ 449 pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, 450 rq->extts.index); 451 if (!TSIO_PIN_VALID(pin_id)) 452 return -EOPNOTSUPP; 453 if (!on) 454 break; 455 rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_IN); 456 if (rc) 457 return rc; 458 rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_EXTERNAL); 459 if (!rc) 460 ptp->pps_info.pins[pin_id].event = BNXT_PPS_EVENT_EXTERNAL; 461 return rc; 462 case PTP_CLK_REQ_PEROUT: 463 /* Configure a Periodic PPS OUT */ 464 pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, 465 rq->perout.index); 466 if (!TSIO_PIN_VALID(pin_id)) 467 return -EOPNOTSUPP; 468 if (!on) 469 break; 470 471 rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_OUT); 472 if (!rc) 473 rc = bnxt_ptp_perout_cfg(ptp, rq); 474 475 return rc; 476 case PTP_CLK_REQ_PPS: 477 /* Configure PHC PPS IN */ 478 rc = bnxt_ptp_cfg_pin(bp, 0, BNXT_PPS_PIN_PPS_IN); 479 if (rc) 480 return rc; 481 rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_INTERNAL); 482 if (!rc) 483 ptp->pps_info.pins[0].event = BNXT_PPS_EVENT_INTERNAL; 484 return rc; 485 default: 486 netdev_err(ptp->bp->dev, "Unrecognized PIN function\n"); 487 return -EOPNOTSUPP; 488 } 489 490 return bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_NONE); 491 } 492 493 static int bnxt_hwrm_ptp_cfg(struct bnxt *bp) 494 { 495 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 496 u32 flags = 0; 497 int rc = 0; 498 499 switch (ptp->rx_filter) { 500 case HWTSTAMP_FILTER_ALL: 501 flags = PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_ENABLE; 502 break; 503 case HWTSTAMP_FILTER_NONE: 504 flags = PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE; 505 if (bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) 506 flags |= PORT_MAC_CFG_REQ_FLAGS_ALL_RX_TS_CAPTURE_DISABLE; 507 break; 508 case HWTSTAMP_FILTER_PTP_V2_EVENT: 509 case HWTSTAMP_FILTER_PTP_V2_SYNC: 510 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 511 flags = PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE; 512 break; 513 } 514 515 if (ptp->tx_tstamp_en) 516 flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE; 517 else 518 flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE; 519 520 ptp->tstamp_filters = flags; 521 522 if (netif_running(bp->dev)) { 523 if (ptp->rx_filter == HWTSTAMP_FILTER_ALL) { 524 rc = bnxt_close_nic(bp, false, false); 525 if (!rc) 526 rc = bnxt_open_nic(bp, false, false); 527 } else { 528 bnxt_ptp_cfg_tstamp_filters(bp); 529 } 530 if (!rc && !ptp->tstamp_filters) 531 rc = -EIO; 532 } 533 534 return rc; 535 } 536 537 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) 538 { 539 struct bnxt *bp = netdev_priv(dev); 540 struct hwtstamp_config stmpconf; 541 struct bnxt_ptp_cfg *ptp; 542 u16 old_rxctl; 543 int old_rx_filter, rc; 544 u8 old_tx_tstamp_en; 545 546 ptp = bp->ptp_cfg; 547 if (!ptp) 548 return -EOPNOTSUPP; 549 550 if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf))) 551 return -EFAULT; 552 553 if (stmpconf.tx_type != HWTSTAMP_TX_ON && 554 stmpconf.tx_type != HWTSTAMP_TX_OFF) 555 return -ERANGE; 556 557 old_rx_filter = ptp->rx_filter; 558 old_rxctl = ptp->rxctl; 559 old_tx_tstamp_en = ptp->tx_tstamp_en; 560 switch (stmpconf.rx_filter) { 561 case HWTSTAMP_FILTER_NONE: 562 ptp->rxctl = 0; 563 ptp->rx_filter = HWTSTAMP_FILTER_NONE; 564 break; 565 case HWTSTAMP_FILTER_ALL: 566 if (bp->fw_cap & BNXT_FW_CAP_RX_ALL_PKT_TS) { 567 ptp->rx_filter = HWTSTAMP_FILTER_ALL; 568 break; 569 } 570 return -EOPNOTSUPP; 571 case HWTSTAMP_FILTER_PTP_V2_EVENT: 572 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 573 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 574 ptp->rxctl = BNXT_PTP_MSG_EVENTS; 575 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 576 break; 577 case HWTSTAMP_FILTER_PTP_V2_SYNC: 578 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 579 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 580 ptp->rxctl = BNXT_PTP_MSG_SYNC; 581 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC; 582 break; 583 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 584 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 585 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 586 ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ; 587 ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ; 588 break; 589 default: 590 return -ERANGE; 591 } 592 593 if (stmpconf.tx_type == HWTSTAMP_TX_ON) 594 ptp->tx_tstamp_en = 1; 595 else 596 ptp->tx_tstamp_en = 0; 597 598 rc = bnxt_hwrm_ptp_cfg(bp); 599 if (rc) 600 goto ts_set_err; 601 602 stmpconf.rx_filter = ptp->rx_filter; 603 return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ? 604 -EFAULT : 0; 605 606 ts_set_err: 607 ptp->rx_filter = old_rx_filter; 608 ptp->rxctl = old_rxctl; 609 ptp->tx_tstamp_en = old_tx_tstamp_en; 610 return rc; 611 } 612 613 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) 614 { 615 struct bnxt *bp = netdev_priv(dev); 616 struct hwtstamp_config stmpconf; 617 struct bnxt_ptp_cfg *ptp; 618 619 ptp = bp->ptp_cfg; 620 if (!ptp) 621 return -EOPNOTSUPP; 622 623 stmpconf.flags = 0; 624 stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; 625 626 stmpconf.rx_filter = ptp->rx_filter; 627 return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ? 628 -EFAULT : 0; 629 } 630 631 static int bnxt_map_regs(struct bnxt *bp, u32 *reg_arr, int count, int reg_win) 632 { 633 u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK; 634 u32 win_off; 635 int i; 636 637 for (i = 0; i < count; i++) { 638 if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base) 639 return -ERANGE; 640 } 641 win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4; 642 writel(reg_base, bp->bar0 + win_off); 643 return 0; 644 } 645 646 static int bnxt_map_ptp_regs(struct bnxt *bp) 647 { 648 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 649 u32 *reg_arr; 650 int rc, i; 651 652 reg_arr = ptp->refclk_regs; 653 if (bp->flags & BNXT_FLAG_CHIP_P5) { 654 rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN); 655 if (rc) 656 return rc; 657 for (i = 0; i < 2; i++) 658 ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE + 659 (ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK); 660 return 0; 661 } 662 return -ENODEV; 663 } 664 665 static void bnxt_unmap_ptp_regs(struct bnxt *bp) 666 { 667 writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 668 (BNXT_PTP_GRC_WIN - 1) * 4); 669 } 670 671 static u64 bnxt_cc_read(const struct cyclecounter *cc) 672 { 673 struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc); 674 u64 ns = 0; 675 676 bnxt_refclk_read(ptp->bp, NULL, &ns); 677 return ns; 678 } 679 680 static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb) 681 { 682 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 683 struct skb_shared_hwtstamps timestamp; 684 u64 ts = 0, ns = 0; 685 int rc; 686 687 rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts); 688 if (!rc) { 689 memset(×tamp, 0, sizeof(timestamp)); 690 spin_lock_bh(&ptp->ptp_lock); 691 ns = timecounter_cyc2time(&ptp->tc, ts); 692 spin_unlock_bh(&ptp->ptp_lock); 693 timestamp.hwtstamp = ns_to_ktime(ns); 694 skb_tstamp_tx(ptp->tx_skb, ×tamp); 695 } else { 696 netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n", 697 rc); 698 } 699 700 dev_kfree_skb_any(ptp->tx_skb); 701 ptp->tx_skb = NULL; 702 atomic_inc(&ptp->tx_avail); 703 } 704 705 static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info) 706 { 707 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 708 ptp_info); 709 unsigned long now = jiffies; 710 struct bnxt *bp = ptp->bp; 711 712 if (ptp->tx_skb) 713 bnxt_stamp_tx_skb(bp, ptp->tx_skb); 714 715 if (!time_after_eq(now, ptp->next_period)) 716 return ptp->next_period - now; 717 718 bnxt_ptp_get_current_time(bp); 719 ptp->next_period = now + HZ; 720 if (time_after_eq(now, ptp->next_overflow_check)) { 721 spin_lock_bh(&ptp->ptp_lock); 722 timecounter_read(&ptp->tc); 723 spin_unlock_bh(&ptp->ptp_lock); 724 ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD; 725 } 726 return HZ; 727 } 728 729 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb) 730 { 731 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 732 733 if (ptp->tx_skb) { 734 netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n"); 735 return -EBUSY; 736 } 737 ptp->tx_skb = skb; 738 ptp_schedule_worker(ptp->ptp_clock, 0); 739 return 0; 740 } 741 742 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts) 743 { 744 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 745 u64 time; 746 747 if (!ptp) 748 return -ENODEV; 749 750 BNXT_READ_TIME64(ptp, time, ptp->old_time); 751 *ts = (time & BNXT_HI_TIMER_MASK) | pkt_ts; 752 if (pkt_ts < (time & BNXT_LO_TIMER_MASK)) 753 *ts += BNXT_LO_TIMER_MASK + 1; 754 755 return 0; 756 } 757 758 static const struct ptp_clock_info bnxt_ptp_caps = { 759 .owner = THIS_MODULE, 760 .name = "bnxt clock", 761 .max_adj = BNXT_MAX_PHC_DRIFT, 762 .n_alarm = 0, 763 .n_ext_ts = 0, 764 .n_per_out = 0, 765 .n_pins = 0, 766 .pps = 0, 767 .adjfine = bnxt_ptp_adjfine, 768 .adjtime = bnxt_ptp_adjtime, 769 .do_aux_work = bnxt_ptp_ts_aux_work, 770 .gettimex64 = bnxt_ptp_gettimex, 771 .settime64 = bnxt_ptp_settime, 772 .enable = bnxt_ptp_enable, 773 }; 774 775 static int bnxt_ptp_verify(struct ptp_clock_info *ptp_info, unsigned int pin, 776 enum ptp_pin_function func, unsigned int chan) 777 { 778 struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, 779 ptp_info); 780 /* Allow only PPS pin function configuration */ 781 if (ptp->pps_info.pins[pin].usage <= BNXT_PPS_PIN_PPS_OUT && 782 func != PTP_PF_PHYSYNC) 783 return 0; 784 else 785 return -EOPNOTSUPP; 786 } 787 788 static int bnxt_ptp_pps_init(struct bnxt *bp) 789 { 790 struct hwrm_func_ptp_pin_qcfg_output *resp; 791 struct hwrm_func_ptp_pin_qcfg_input *req; 792 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 793 struct ptp_clock_info *ptp_info; 794 struct bnxt_pps *pps_info; 795 u8 *pin_usg; 796 u32 i, rc; 797 798 /* Query current/default PIN CFG */ 799 rc = hwrm_req_init(bp, req, HWRM_FUNC_PTP_PIN_QCFG); 800 if (rc) 801 return rc; 802 803 resp = hwrm_req_hold(bp, req); 804 rc = hwrm_req_send(bp, req); 805 if (rc || !resp->num_pins) { 806 hwrm_req_drop(bp, req); 807 return -EOPNOTSUPP; 808 } 809 810 ptp_info = &ptp->ptp_info; 811 pps_info = &ptp->pps_info; 812 pps_info->num_pins = resp->num_pins; 813 ptp_info->n_pins = pps_info->num_pins; 814 ptp_info->pin_config = kcalloc(ptp_info->n_pins, 815 sizeof(*ptp_info->pin_config), 816 GFP_KERNEL); 817 if (!ptp_info->pin_config) { 818 hwrm_req_drop(bp, req); 819 return -ENOMEM; 820 } 821 822 /* Report the TSIO capability to kernel */ 823 pin_usg = &resp->pin0_usage; 824 for (i = 0; i < pps_info->num_pins; i++, pin_usg++) { 825 snprintf(ptp_info->pin_config[i].name, 826 sizeof(ptp_info->pin_config[i].name), "bnxt_pps%d", i); 827 ptp_info->pin_config[i].index = i; 828 ptp_info->pin_config[i].chan = i; 829 if (*pin_usg == BNXT_PPS_PIN_PPS_IN) 830 ptp_info->pin_config[i].func = PTP_PF_EXTTS; 831 else if (*pin_usg == BNXT_PPS_PIN_PPS_OUT) 832 ptp_info->pin_config[i].func = PTP_PF_PEROUT; 833 else 834 ptp_info->pin_config[i].func = PTP_PF_NONE; 835 836 pps_info->pins[i].usage = *pin_usg; 837 } 838 hwrm_req_drop(bp, req); 839 840 /* Only 1 each of ext_ts and per_out pins is available in HW */ 841 ptp_info->n_ext_ts = 1; 842 ptp_info->n_per_out = 1; 843 ptp_info->pps = 1; 844 ptp_info->verify = bnxt_ptp_verify; 845 846 return 0; 847 } 848 849 static bool bnxt_pps_config_ok(struct bnxt *bp) 850 { 851 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 852 853 return !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) == !ptp->ptp_info.pin_config; 854 } 855 856 static void bnxt_ptp_timecounter_init(struct bnxt *bp, bool init_tc) 857 { 858 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 859 860 if (!ptp->ptp_clock) { 861 memset(&ptp->cc, 0, sizeof(ptp->cc)); 862 ptp->cc.read = bnxt_cc_read; 863 ptp->cc.mask = CYCLECOUNTER_MASK(48); 864 if (BNXT_MH(bp)) { 865 /* Use timecounter based non-real time mode */ 866 ptp->cc.shift = BNXT_CYCLES_SHIFT; 867 ptp->cc.mult = clocksource_khz2mult(BNXT_DEVCLK_FREQ, ptp->cc.shift); 868 ptp->cmult = ptp->cc.mult; 869 } else { 870 ptp->cc.shift = 0; 871 ptp->cc.mult = 1; 872 } 873 ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD; 874 } 875 if (init_tc) 876 timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real())); 877 } 878 879 /* Caller holds ptp_lock */ 880 void bnxt_ptp_rtc_timecounter_init(struct bnxt_ptp_cfg *ptp, u64 ns) 881 { 882 timecounter_init(&ptp->tc, &ptp->cc, ns); 883 /* For RTC, cycle_last must be in sync with the timecounter value. */ 884 ptp->tc.cycle_last = ns & ptp->cc.mask; 885 } 886 887 int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg) 888 { 889 struct timespec64 tsp; 890 u64 ns; 891 int rc; 892 893 if (!bp->ptp_cfg || !BNXT_PTP_USE_RTC(bp)) 894 return -ENODEV; 895 896 if (!phc_cfg) { 897 ktime_get_real_ts64(&tsp); 898 ns = timespec64_to_ns(&tsp); 899 rc = bnxt_ptp_cfg_settime(bp, ns); 900 if (rc) 901 return rc; 902 } else { 903 rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_CURRENT_TIME, &ns); 904 if (rc) 905 return rc; 906 } 907 spin_lock_bh(&bp->ptp_cfg->ptp_lock); 908 bnxt_ptp_rtc_timecounter_init(bp->ptp_cfg, ns); 909 spin_unlock_bh(&bp->ptp_cfg->ptp_lock); 910 911 return 0; 912 } 913 914 static void bnxt_ptp_free(struct bnxt *bp) 915 { 916 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 917 918 if (ptp->ptp_clock) { 919 ptp_clock_unregister(ptp->ptp_clock); 920 ptp->ptp_clock = NULL; 921 kfree(ptp->ptp_info.pin_config); 922 ptp->ptp_info.pin_config = NULL; 923 } 924 } 925 926 int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg) 927 { 928 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 929 int rc; 930 931 if (!ptp) 932 return 0; 933 934 rc = bnxt_map_ptp_regs(bp); 935 if (rc) 936 return rc; 937 938 if (ptp->ptp_clock && bnxt_pps_config_ok(bp)) 939 return 0; 940 941 bnxt_ptp_free(bp); 942 943 atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS); 944 spin_lock_init(&ptp->ptp_lock); 945 946 if (BNXT_PTP_USE_RTC(bp)) { 947 bnxt_ptp_timecounter_init(bp, false); 948 rc = bnxt_ptp_init_rtc(bp, phc_cfg); 949 if (rc) 950 goto out; 951 } else { 952 bnxt_ptp_timecounter_init(bp, true); 953 bnxt_ptp_adjfine_rtc(bp, 0); 954 } 955 956 ptp->ptp_info = bnxt_ptp_caps; 957 if ((bp->fw_cap & BNXT_FW_CAP_PTP_PPS)) { 958 if (bnxt_ptp_pps_init(bp)) 959 netdev_err(bp->dev, "1pps not initialized, continuing without 1pps support\n"); 960 } 961 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev); 962 if (IS_ERR(ptp->ptp_clock)) { 963 int err = PTR_ERR(ptp->ptp_clock); 964 965 ptp->ptp_clock = NULL; 966 rc = err; 967 goto out; 968 } 969 if (bp->flags & BNXT_FLAG_CHIP_P5) { 970 spin_lock_bh(&ptp->ptp_lock); 971 bnxt_refclk_read(bp, NULL, &ptp->current_time); 972 WRITE_ONCE(ptp->old_time, ptp->current_time); 973 spin_unlock_bh(&ptp->ptp_lock); 974 ptp_schedule_worker(ptp->ptp_clock, 0); 975 } 976 return 0; 977 978 out: 979 bnxt_ptp_free(bp); 980 bnxt_unmap_ptp_regs(bp); 981 return rc; 982 } 983 984 void bnxt_ptp_clear(struct bnxt *bp) 985 { 986 struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; 987 988 if (!ptp) 989 return; 990 991 if (ptp->ptp_clock) 992 ptp_clock_unregister(ptp->ptp_clock); 993 994 ptp->ptp_clock = NULL; 995 kfree(ptp->ptp_info.pin_config); 996 ptp->ptp_info.pin_config = NULL; 997 998 if (ptp->tx_skb) { 999 dev_kfree_skb_any(ptp->tx_skb); 1000 ptp->tx_skb = NULL; 1001 } 1002 bnxt_unmap_ptp_regs(bp); 1003 } 1004