1 /* 2 * AMD 10Gb Ethernet driver 3 * 4 * This file is available to you under your choice of the following two 5 * licenses: 6 * 7 * License 1: GPLv2 8 * 9 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 10 * 11 * This file is free software; you may copy, redistribute and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation, either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This file is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program. If not, see <http://www.gnu.org/licenses/>. 23 * 24 * This file incorporates work covered by the following copyright and 25 * permission notice: 26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 28 * Inc. unless otherwise expressly agreed to in writing between Synopsys 29 * and you. 30 * 31 * The Software IS NOT an item of Licensed Software or Licensed Product 32 * under any End User Software License Agreement or Agreement for Licensed 33 * Product with Synopsys or any supplement thereto. Permission is hereby 34 * granted, free of charge, to any person obtaining a copy of this software 35 * annotated with this license and the Software, to deal in the Software 36 * without restriction, including without limitation the rights to use, 37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 38 * of the Software, and to permit persons to whom the Software is furnished 39 * to do so, subject to the following conditions: 40 * 41 * The above copyright notice and this permission notice shall be included 42 * in all copies or substantial portions of the Software. 43 * 44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 54 * THE POSSIBILITY OF SUCH DAMAGE. 55 * 56 * 57 * License 2: Modified BSD 58 * 59 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions are met: 64 * * Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * * Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * * Neither the name of Advanced Micro Devices, Inc. nor the 70 * names of its contributors may be used to endorse or promote products 71 * derived from this software without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY 77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83 * 84 * This file incorporates work covered by the following copyright and 85 * permission notice: 86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 88 * Inc. unless otherwise expressly agreed to in writing between Synopsys 89 * and you. 90 * 91 * The Software IS NOT an item of Licensed Software or Licensed Product 92 * under any End User Software License Agreement or Agreement for Licensed 93 * Product with Synopsys or any supplement thereto. Permission is hereby 94 * granted, free of charge, to any person obtaining a copy of this software 95 * annotated with this license and the Software, to deal in the Software 96 * without restriction, including without limitation the rights to use, 97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 98 * of the Software, and to permit persons to whom the Software is furnished 99 * to do so, subject to the following conditions: 100 * 101 * The above copyright notice and this permission notice shall be included 102 * in all copies or substantial portions of the Software. 103 * 104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 114 * THE POSSIBILITY OF SUCH DAMAGE. 115 */ 116 117 #include <linux/phy.h> 118 #include <linux/mdio.h> 119 #include <linux/clk.h> 120 #include <linux/bitrev.h> 121 #include <linux/crc32.h> 122 #include <linux/crc32poly.h> 123 124 #include "xgbe.h" 125 #include "xgbe-common.h" 126 127 static inline unsigned int xgbe_get_max_frame(struct xgbe_prv_data *pdata) 128 { 129 return pdata->netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 130 } 131 132 static unsigned int xgbe_usec_to_riwt(struct xgbe_prv_data *pdata, 133 unsigned int usec) 134 { 135 unsigned long rate; 136 unsigned int ret; 137 138 DBGPR("-->xgbe_usec_to_riwt\n"); 139 140 rate = pdata->sysclk_rate; 141 142 /* 143 * Convert the input usec value to the watchdog timer value. Each 144 * watchdog timer value is equivalent to 256 clock cycles. 145 * Calculate the required value as: 146 * ( usec * ( system_clock_mhz / 10^6 ) / 256 147 */ 148 ret = (usec * (rate / 1000000)) / 256; 149 150 DBGPR("<--xgbe_usec_to_riwt\n"); 151 152 return ret; 153 } 154 155 static unsigned int xgbe_riwt_to_usec(struct xgbe_prv_data *pdata, 156 unsigned int riwt) 157 { 158 unsigned long rate; 159 unsigned int ret; 160 161 DBGPR("-->xgbe_riwt_to_usec\n"); 162 163 rate = pdata->sysclk_rate; 164 165 /* 166 * Convert the input watchdog timer value to the usec value. Each 167 * watchdog timer value is equivalent to 256 clock cycles. 168 * Calculate the required value as: 169 * ( riwt * 256 ) / ( system_clock_mhz / 10^6 ) 170 */ 171 ret = (riwt * 256) / (rate / 1000000); 172 173 DBGPR("<--xgbe_riwt_to_usec\n"); 174 175 return ret; 176 } 177 178 static int xgbe_config_pbl_val(struct xgbe_prv_data *pdata) 179 { 180 unsigned int pblx8, pbl; 181 unsigned int i; 182 183 pblx8 = DMA_PBL_X8_DISABLE; 184 pbl = pdata->pbl; 185 186 if (pdata->pbl > 32) { 187 pblx8 = DMA_PBL_X8_ENABLE; 188 pbl >>= 3; 189 } 190 191 for (i = 0; i < pdata->channel_count; i++) { 192 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_CR, PBLX8, 193 pblx8); 194 195 if (pdata->channel[i]->tx_ring) 196 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, 197 PBL, pbl); 198 199 if (pdata->channel[i]->rx_ring) 200 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, 201 PBL, pbl); 202 } 203 204 return 0; 205 } 206 207 static int xgbe_config_osp_mode(struct xgbe_prv_data *pdata) 208 { 209 unsigned int i; 210 211 for (i = 0; i < pdata->channel_count; i++) { 212 if (!pdata->channel[i]->tx_ring) 213 break; 214 215 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, OSP, 216 pdata->tx_osp_mode); 217 } 218 219 return 0; 220 } 221 222 static int xgbe_config_rsf_mode(struct xgbe_prv_data *pdata, unsigned int val) 223 { 224 unsigned int i; 225 226 for (i = 0; i < pdata->rx_q_count; i++) 227 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQOMR, RSF, val); 228 229 return 0; 230 } 231 232 static int xgbe_config_tsf_mode(struct xgbe_prv_data *pdata, unsigned int val) 233 { 234 unsigned int i; 235 236 for (i = 0; i < pdata->tx_q_count; i++) 237 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TSF, val); 238 239 return 0; 240 } 241 242 static int xgbe_config_rx_threshold(struct xgbe_prv_data *pdata, 243 unsigned int val) 244 { 245 unsigned int i; 246 247 for (i = 0; i < pdata->rx_q_count; i++) 248 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQOMR, RTC, val); 249 250 return 0; 251 } 252 253 static int xgbe_config_tx_threshold(struct xgbe_prv_data *pdata, 254 unsigned int val) 255 { 256 unsigned int i; 257 258 for (i = 0; i < pdata->tx_q_count; i++) 259 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TTC, val); 260 261 return 0; 262 } 263 264 static int xgbe_config_rx_coalesce(struct xgbe_prv_data *pdata) 265 { 266 unsigned int i; 267 268 for (i = 0; i < pdata->channel_count; i++) { 269 if (!pdata->channel[i]->rx_ring) 270 break; 271 272 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RIWT, RWT, 273 pdata->rx_riwt); 274 } 275 276 return 0; 277 } 278 279 static int xgbe_config_tx_coalesce(struct xgbe_prv_data *pdata) 280 { 281 return 0; 282 } 283 284 static void xgbe_config_rx_buffer_size(struct xgbe_prv_data *pdata) 285 { 286 unsigned int i; 287 288 for (i = 0; i < pdata->channel_count; i++) { 289 if (!pdata->channel[i]->rx_ring) 290 break; 291 292 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, RBSZ, 293 pdata->rx_buf_size); 294 } 295 } 296 297 static void xgbe_config_tso_mode(struct xgbe_prv_data *pdata) 298 { 299 unsigned int i; 300 301 for (i = 0; i < pdata->channel_count; i++) { 302 if (!pdata->channel[i]->tx_ring) 303 break; 304 305 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, TSE, 1); 306 } 307 } 308 309 static void xgbe_config_sph_mode(struct xgbe_prv_data *pdata) 310 { 311 unsigned int i; 312 313 for (i = 0; i < pdata->channel_count; i++) { 314 if (!pdata->channel[i]->rx_ring) 315 break; 316 317 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_CR, SPH, 1); 318 } 319 320 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, HDSMS, XGBE_SPH_HDSMS_SIZE); 321 } 322 323 static int xgbe_write_rss_reg(struct xgbe_prv_data *pdata, unsigned int type, 324 unsigned int index, unsigned int val) 325 { 326 unsigned int wait; 327 int ret = 0; 328 329 mutex_lock(&pdata->rss_mutex); 330 331 if (XGMAC_IOREAD_BITS(pdata, MAC_RSSAR, OB)) { 332 ret = -EBUSY; 333 goto unlock; 334 } 335 336 XGMAC_IOWRITE(pdata, MAC_RSSDR, val); 337 338 XGMAC_IOWRITE_BITS(pdata, MAC_RSSAR, RSSIA, index); 339 XGMAC_IOWRITE_BITS(pdata, MAC_RSSAR, ADDRT, type); 340 XGMAC_IOWRITE_BITS(pdata, MAC_RSSAR, CT, 0); 341 XGMAC_IOWRITE_BITS(pdata, MAC_RSSAR, OB, 1); 342 343 wait = 1000; 344 while (wait--) { 345 if (!XGMAC_IOREAD_BITS(pdata, MAC_RSSAR, OB)) 346 goto unlock; 347 348 usleep_range(1000, 1500); 349 } 350 351 ret = -EBUSY; 352 353 unlock: 354 mutex_unlock(&pdata->rss_mutex); 355 356 return ret; 357 } 358 359 static int xgbe_write_rss_hash_key(struct xgbe_prv_data *pdata) 360 { 361 unsigned int key_regs = sizeof(pdata->rss_key) / sizeof(u32); 362 unsigned int *key = (unsigned int *)&pdata->rss_key; 363 int ret; 364 365 while (key_regs--) { 366 ret = xgbe_write_rss_reg(pdata, XGBE_RSS_HASH_KEY_TYPE, 367 key_regs, *key++); 368 if (ret) 369 return ret; 370 } 371 372 return 0; 373 } 374 375 static int xgbe_write_rss_lookup_table(struct xgbe_prv_data *pdata) 376 { 377 unsigned int i; 378 int ret; 379 380 for (i = 0; i < ARRAY_SIZE(pdata->rss_table); i++) { 381 ret = xgbe_write_rss_reg(pdata, 382 XGBE_RSS_LOOKUP_TABLE_TYPE, i, 383 pdata->rss_table[i]); 384 if (ret) 385 return ret; 386 } 387 388 return 0; 389 } 390 391 static int xgbe_set_rss_hash_key(struct xgbe_prv_data *pdata, const u8 *key) 392 { 393 memcpy(pdata->rss_key, key, sizeof(pdata->rss_key)); 394 395 return xgbe_write_rss_hash_key(pdata); 396 } 397 398 static int xgbe_set_rss_lookup_table(struct xgbe_prv_data *pdata, 399 const u32 *table) 400 { 401 unsigned int i; 402 403 for (i = 0; i < ARRAY_SIZE(pdata->rss_table); i++) 404 XGMAC_SET_BITS(pdata->rss_table[i], MAC_RSSDR, DMCH, table[i]); 405 406 return xgbe_write_rss_lookup_table(pdata); 407 } 408 409 static int xgbe_enable_rss(struct xgbe_prv_data *pdata) 410 { 411 int ret; 412 413 if (!pdata->hw_feat.rss) 414 return -EOPNOTSUPP; 415 416 /* Program the hash key */ 417 ret = xgbe_write_rss_hash_key(pdata); 418 if (ret) 419 return ret; 420 421 /* Program the lookup table */ 422 ret = xgbe_write_rss_lookup_table(pdata); 423 if (ret) 424 return ret; 425 426 /* Set the RSS options */ 427 XGMAC_IOWRITE(pdata, MAC_RSSCR, pdata->rss_options); 428 429 /* Enable RSS */ 430 XGMAC_IOWRITE_BITS(pdata, MAC_RSSCR, RSSE, 1); 431 432 return 0; 433 } 434 435 static int xgbe_disable_rss(struct xgbe_prv_data *pdata) 436 { 437 if (!pdata->hw_feat.rss) 438 return -EOPNOTSUPP; 439 440 XGMAC_IOWRITE_BITS(pdata, MAC_RSSCR, RSSE, 0); 441 442 return 0; 443 } 444 445 static void xgbe_config_rss(struct xgbe_prv_data *pdata) 446 { 447 int ret; 448 449 if (!pdata->hw_feat.rss) 450 return; 451 452 if (pdata->netdev->features & NETIF_F_RXHASH) 453 ret = xgbe_enable_rss(pdata); 454 else 455 ret = xgbe_disable_rss(pdata); 456 457 if (ret) 458 netdev_err(pdata->netdev, 459 "error configuring RSS, RSS disabled\n"); 460 } 461 462 static bool xgbe_is_pfc_queue(struct xgbe_prv_data *pdata, 463 unsigned int queue) 464 { 465 unsigned int prio, tc; 466 467 for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) { 468 /* Does this queue handle the priority? */ 469 if (pdata->prio2q_map[prio] != queue) 470 continue; 471 472 /* Get the Traffic Class for this priority */ 473 tc = pdata->ets->prio_tc[prio]; 474 475 /* Check if PFC is enabled for this traffic class */ 476 if (pdata->pfc->pfc_en & (1 << tc)) 477 return true; 478 } 479 480 return false; 481 } 482 483 static void xgbe_set_vxlan_id(struct xgbe_prv_data *pdata) 484 { 485 /* Program the VXLAN port */ 486 XGMAC_IOWRITE_BITS(pdata, MAC_TIR, TNID, pdata->vxlan_port); 487 488 netif_dbg(pdata, drv, pdata->netdev, "VXLAN tunnel id set to %hx\n", 489 pdata->vxlan_port); 490 } 491 492 static void xgbe_enable_vxlan(struct xgbe_prv_data *pdata) 493 { 494 if (!pdata->hw_feat.vxn) 495 return; 496 497 /* Program the VXLAN port */ 498 xgbe_set_vxlan_id(pdata); 499 500 /* Allow for IPv6/UDP zero-checksum VXLAN packets */ 501 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, VUCC, 1); 502 503 /* Enable VXLAN tunneling mode */ 504 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, VNM, 0); 505 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, VNE, 1); 506 507 netif_dbg(pdata, drv, pdata->netdev, "VXLAN acceleration enabled\n"); 508 } 509 510 static void xgbe_disable_vxlan(struct xgbe_prv_data *pdata) 511 { 512 if (!pdata->hw_feat.vxn) 513 return; 514 515 /* Disable tunneling mode */ 516 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, VNE, 0); 517 518 /* Clear IPv6/UDP zero-checksum VXLAN packets setting */ 519 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, VUCC, 0); 520 521 /* Clear the VXLAN port */ 522 XGMAC_IOWRITE_BITS(pdata, MAC_TIR, TNID, 0); 523 524 netif_dbg(pdata, drv, pdata->netdev, "VXLAN acceleration disabled\n"); 525 } 526 527 static int xgbe_disable_tx_flow_control(struct xgbe_prv_data *pdata) 528 { 529 unsigned int max_q_count, q_count; 530 unsigned int reg, reg_val; 531 unsigned int i; 532 533 /* Clear MTL flow control */ 534 for (i = 0; i < pdata->rx_q_count; i++) 535 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQOMR, EHFC, 0); 536 537 /* Clear MAC flow control */ 538 max_q_count = XGMAC_MAX_FLOW_CONTROL_QUEUES; 539 q_count = min_t(unsigned int, pdata->tx_q_count, max_q_count); 540 reg = MAC_Q0TFCR; 541 for (i = 0; i < q_count; i++) { 542 reg_val = XGMAC_IOREAD(pdata, reg); 543 XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, TFE, 0); 544 XGMAC_IOWRITE(pdata, reg, reg_val); 545 546 reg += MAC_QTFCR_INC; 547 } 548 549 return 0; 550 } 551 552 static int xgbe_enable_tx_flow_control(struct xgbe_prv_data *pdata) 553 { 554 struct ieee_pfc *pfc = pdata->pfc; 555 struct ieee_ets *ets = pdata->ets; 556 unsigned int max_q_count, q_count; 557 unsigned int reg, reg_val; 558 unsigned int i; 559 560 /* Set MTL flow control */ 561 for (i = 0; i < pdata->rx_q_count; i++) { 562 unsigned int ehfc = 0; 563 564 if (pdata->rx_rfd[i]) { 565 /* Flow control thresholds are established */ 566 if (pfc && ets) { 567 if (xgbe_is_pfc_queue(pdata, i)) 568 ehfc = 1; 569 } else { 570 ehfc = 1; 571 } 572 } 573 574 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQOMR, EHFC, ehfc); 575 576 netif_dbg(pdata, drv, pdata->netdev, 577 "flow control %s for RXq%u\n", 578 ehfc ? "enabled" : "disabled", i); 579 } 580 581 /* Set MAC flow control */ 582 max_q_count = XGMAC_MAX_FLOW_CONTROL_QUEUES; 583 q_count = min_t(unsigned int, pdata->tx_q_count, max_q_count); 584 reg = MAC_Q0TFCR; 585 for (i = 0; i < q_count; i++) { 586 reg_val = XGMAC_IOREAD(pdata, reg); 587 588 /* Enable transmit flow control */ 589 XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, TFE, 1); 590 /* Set pause time */ 591 XGMAC_SET_BITS(reg_val, MAC_Q0TFCR, PT, 0xffff); 592 593 XGMAC_IOWRITE(pdata, reg, reg_val); 594 595 reg += MAC_QTFCR_INC; 596 } 597 598 return 0; 599 } 600 601 static int xgbe_disable_rx_flow_control(struct xgbe_prv_data *pdata) 602 { 603 XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, RFE, 0); 604 605 return 0; 606 } 607 608 static int xgbe_enable_rx_flow_control(struct xgbe_prv_data *pdata) 609 { 610 XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, RFE, 1); 611 612 return 0; 613 } 614 615 static int xgbe_config_tx_flow_control(struct xgbe_prv_data *pdata) 616 { 617 struct ieee_pfc *pfc = pdata->pfc; 618 619 if (pdata->tx_pause || (pfc && pfc->pfc_en)) 620 xgbe_enable_tx_flow_control(pdata); 621 else 622 xgbe_disable_tx_flow_control(pdata); 623 624 return 0; 625 } 626 627 static int xgbe_config_rx_flow_control(struct xgbe_prv_data *pdata) 628 { 629 struct ieee_pfc *pfc = pdata->pfc; 630 631 if (pdata->rx_pause || (pfc && pfc->pfc_en)) 632 xgbe_enable_rx_flow_control(pdata); 633 else 634 xgbe_disable_rx_flow_control(pdata); 635 636 return 0; 637 } 638 639 static void xgbe_config_flow_control(struct xgbe_prv_data *pdata) 640 { 641 struct ieee_pfc *pfc = pdata->pfc; 642 643 xgbe_config_tx_flow_control(pdata); 644 xgbe_config_rx_flow_control(pdata); 645 646 XGMAC_IOWRITE_BITS(pdata, MAC_RFCR, PFCE, 647 (pfc && pfc->pfc_en) ? 1 : 0); 648 } 649 650 static void xgbe_enable_dma_interrupts(struct xgbe_prv_data *pdata) 651 { 652 struct xgbe_channel *channel; 653 unsigned int i, ver; 654 655 /* Set the interrupt mode if supported */ 656 if (pdata->channel_irq_mode) 657 XGMAC_IOWRITE_BITS(pdata, DMA_MR, INTM, 658 pdata->channel_irq_mode); 659 660 ver = XGMAC_GET_BITS(pdata->hw_feat.version, MAC_VR, SNPSVER); 661 662 for (i = 0; i < pdata->channel_count; i++) { 663 channel = pdata->channel[i]; 664 665 /* Clear all the interrupts which are set */ 666 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, 667 XGMAC_DMA_IOREAD(channel, DMA_CH_SR)); 668 669 /* Clear all interrupt enable bits */ 670 channel->curr_ier = 0; 671 672 /* Enable following interrupts 673 * NIE - Normal Interrupt Summary Enable 674 * AIE - Abnormal Interrupt Summary Enable 675 * FBEE - Fatal Bus Error Enable 676 */ 677 if (ver < 0x21) { 678 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, NIE20, 1); 679 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, AIE20, 1); 680 } else { 681 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, NIE, 1); 682 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, AIE, 1); 683 } 684 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, FBEE, 1); 685 686 if (channel->tx_ring) { 687 /* Enable the following Tx interrupts 688 * TIE - Transmit Interrupt Enable (unless using 689 * per channel interrupts in edge triggered 690 * mode) 691 */ 692 if (!pdata->per_channel_irq || pdata->channel_irq_mode) 693 XGMAC_SET_BITS(channel->curr_ier, 694 DMA_CH_IER, TIE, 1); 695 } 696 if (channel->rx_ring) { 697 /* Enable following Rx interrupts 698 * RBUE - Receive Buffer Unavailable Enable 699 * RIE - Receive Interrupt Enable (unless using 700 * per channel interrupts in edge triggered 701 * mode) 702 */ 703 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RBUE, 1); 704 if (!pdata->per_channel_irq || pdata->channel_irq_mode) 705 XGMAC_SET_BITS(channel->curr_ier, 706 DMA_CH_IER, RIE, 1); 707 } 708 709 XGMAC_DMA_IOWRITE(channel, DMA_CH_IER, channel->curr_ier); 710 } 711 } 712 713 static void xgbe_enable_mtl_interrupts(struct xgbe_prv_data *pdata) 714 { 715 unsigned int mtl_q_isr; 716 unsigned int q_count, i; 717 718 q_count = max(pdata->hw_feat.tx_q_cnt, pdata->hw_feat.rx_q_cnt); 719 for (i = 0; i < q_count; i++) { 720 /* Clear all the interrupts which are set */ 721 mtl_q_isr = XGMAC_MTL_IOREAD(pdata, i, MTL_Q_ISR); 722 XGMAC_MTL_IOWRITE(pdata, i, MTL_Q_ISR, mtl_q_isr); 723 724 /* No MTL interrupts to be enabled */ 725 XGMAC_MTL_IOWRITE(pdata, i, MTL_Q_IER, 0); 726 } 727 } 728 729 static void xgbe_enable_mac_interrupts(struct xgbe_prv_data *pdata) 730 { 731 unsigned int mac_ier = 0; 732 733 /* Enable Timestamp interrupt */ 734 XGMAC_SET_BITS(mac_ier, MAC_IER, TSIE, 1); 735 736 XGMAC_IOWRITE(pdata, MAC_IER, mac_ier); 737 738 /* Enable all counter interrupts */ 739 XGMAC_IOWRITE_BITS(pdata, MMC_RIER, ALL_INTERRUPTS, 0xffffffff); 740 XGMAC_IOWRITE_BITS(pdata, MMC_TIER, ALL_INTERRUPTS, 0xffffffff); 741 742 /* Enable MDIO single command completion interrupt */ 743 XGMAC_IOWRITE_BITS(pdata, MAC_MDIOIER, SNGLCOMPIE, 1); 744 } 745 746 static void xgbe_enable_ecc_interrupts(struct xgbe_prv_data *pdata) 747 { 748 unsigned int ecc_isr, ecc_ier = 0; 749 750 if (!pdata->vdata->ecc_support) 751 return; 752 753 /* Clear all the interrupts which are set */ 754 ecc_isr = XP_IOREAD(pdata, XP_ECC_ISR); 755 XP_IOWRITE(pdata, XP_ECC_ISR, ecc_isr); 756 757 /* Enable ECC interrupts */ 758 XP_SET_BITS(ecc_ier, XP_ECC_IER, TX_DED, 1); 759 XP_SET_BITS(ecc_ier, XP_ECC_IER, TX_SEC, 1); 760 XP_SET_BITS(ecc_ier, XP_ECC_IER, RX_DED, 1); 761 XP_SET_BITS(ecc_ier, XP_ECC_IER, RX_SEC, 1); 762 XP_SET_BITS(ecc_ier, XP_ECC_IER, DESC_DED, 1); 763 XP_SET_BITS(ecc_ier, XP_ECC_IER, DESC_SEC, 1); 764 765 XP_IOWRITE(pdata, XP_ECC_IER, ecc_ier); 766 } 767 768 static void xgbe_disable_ecc_ded(struct xgbe_prv_data *pdata) 769 { 770 unsigned int ecc_ier; 771 772 ecc_ier = XP_IOREAD(pdata, XP_ECC_IER); 773 774 /* Disable ECC DED interrupts */ 775 XP_SET_BITS(ecc_ier, XP_ECC_IER, TX_DED, 0); 776 XP_SET_BITS(ecc_ier, XP_ECC_IER, RX_DED, 0); 777 XP_SET_BITS(ecc_ier, XP_ECC_IER, DESC_DED, 0); 778 779 XP_IOWRITE(pdata, XP_ECC_IER, ecc_ier); 780 } 781 782 static void xgbe_disable_ecc_sec(struct xgbe_prv_data *pdata, 783 enum xgbe_ecc_sec sec) 784 { 785 unsigned int ecc_ier; 786 787 ecc_ier = XP_IOREAD(pdata, XP_ECC_IER); 788 789 /* Disable ECC SEC interrupt */ 790 switch (sec) { 791 case XGBE_ECC_SEC_TX: 792 XP_SET_BITS(ecc_ier, XP_ECC_IER, TX_SEC, 0); 793 break; 794 case XGBE_ECC_SEC_RX: 795 XP_SET_BITS(ecc_ier, XP_ECC_IER, RX_SEC, 0); 796 break; 797 case XGBE_ECC_SEC_DESC: 798 XP_SET_BITS(ecc_ier, XP_ECC_IER, DESC_SEC, 0); 799 break; 800 } 801 802 XP_IOWRITE(pdata, XP_ECC_IER, ecc_ier); 803 } 804 805 static int xgbe_set_speed(struct xgbe_prv_data *pdata, int speed) 806 { 807 unsigned int ss; 808 809 switch (speed) { 810 case SPEED_1000: 811 ss = 0x03; 812 break; 813 case SPEED_2500: 814 ss = 0x02; 815 break; 816 case SPEED_10000: 817 ss = 0x00; 818 break; 819 default: 820 return -EINVAL; 821 } 822 823 if (XGMAC_IOREAD_BITS(pdata, MAC_TCR, SS) != ss) 824 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, SS, ss); 825 826 return 0; 827 } 828 829 static int xgbe_enable_rx_vlan_stripping(struct xgbe_prv_data *pdata) 830 { 831 /* Put the VLAN tag in the Rx descriptor */ 832 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, EVLRXS, 1); 833 834 /* Don't check the VLAN type */ 835 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, DOVLTC, 1); 836 837 /* Check only C-TAG (0x8100) packets */ 838 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, ERSVLM, 0); 839 840 /* Don't consider an S-TAG (0x88A8) packet as a VLAN packet */ 841 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, ESVL, 0); 842 843 /* Enable VLAN tag stripping */ 844 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, EVLS, 0x3); 845 846 return 0; 847 } 848 849 static int xgbe_disable_rx_vlan_stripping(struct xgbe_prv_data *pdata) 850 { 851 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, EVLS, 0); 852 853 return 0; 854 } 855 856 static int xgbe_enable_rx_vlan_filtering(struct xgbe_prv_data *pdata) 857 { 858 /* Enable VLAN filtering */ 859 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, VTFE, 1); 860 861 /* Enable VLAN Hash Table filtering */ 862 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, VTHM, 1); 863 864 /* Disable VLAN tag inverse matching */ 865 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, VTIM, 0); 866 867 /* Only filter on the lower 12-bits of the VLAN tag */ 868 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, ETV, 1); 869 870 /* In order for the VLAN Hash Table filtering to be effective, 871 * the VLAN tag identifier in the VLAN Tag Register must not 872 * be zero. Set the VLAN tag identifier to "1" to enable the 873 * VLAN Hash Table filtering. This implies that a VLAN tag of 874 * 1 will always pass filtering. 875 */ 876 XGMAC_IOWRITE_BITS(pdata, MAC_VLANTR, VL, 1); 877 878 return 0; 879 } 880 881 static int xgbe_disable_rx_vlan_filtering(struct xgbe_prv_data *pdata) 882 { 883 /* Disable VLAN filtering */ 884 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, VTFE, 0); 885 886 return 0; 887 } 888 889 static u32 xgbe_vid_crc32_le(__le16 vid_le) 890 { 891 u32 crc = ~0; 892 u32 temp = 0; 893 unsigned char *data = (unsigned char *)&vid_le; 894 unsigned char data_byte = 0; 895 int i, bits; 896 897 bits = get_bitmask_order(VLAN_VID_MASK); 898 for (i = 0; i < bits; i++) { 899 if ((i % 8) == 0) 900 data_byte = data[i / 8]; 901 902 temp = ((crc & 1) ^ data_byte) & 1; 903 crc >>= 1; 904 data_byte >>= 1; 905 906 if (temp) 907 crc ^= CRC32_POLY_LE; 908 } 909 910 return crc; 911 } 912 913 static int xgbe_update_vlan_hash_table(struct xgbe_prv_data *pdata) 914 { 915 u32 crc; 916 u16 vid; 917 __le16 vid_le; 918 u16 vlan_hash_table = 0; 919 920 /* Generate the VLAN Hash Table value */ 921 for_each_set_bit(vid, pdata->active_vlans, VLAN_N_VID) { 922 /* Get the CRC32 value of the VLAN ID */ 923 vid_le = cpu_to_le16(vid); 924 crc = bitrev32(~xgbe_vid_crc32_le(vid_le)) >> 28; 925 926 vlan_hash_table |= (1 << crc); 927 } 928 929 /* Set the VLAN Hash Table filtering register */ 930 XGMAC_IOWRITE_BITS(pdata, MAC_VLANHTR, VLHT, vlan_hash_table); 931 932 return 0; 933 } 934 935 static int xgbe_set_promiscuous_mode(struct xgbe_prv_data *pdata, 936 unsigned int enable) 937 { 938 unsigned int val = enable ? 1 : 0; 939 940 if (XGMAC_IOREAD_BITS(pdata, MAC_PFR, PR) == val) 941 return 0; 942 943 netif_dbg(pdata, drv, pdata->netdev, "%s promiscuous mode\n", 944 enable ? "entering" : "leaving"); 945 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, PR, val); 946 947 /* Hardware will still perform VLAN filtering in promiscuous mode */ 948 if (enable) { 949 xgbe_disable_rx_vlan_filtering(pdata); 950 } else { 951 if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 952 xgbe_enable_rx_vlan_filtering(pdata); 953 } 954 955 return 0; 956 } 957 958 static int xgbe_set_all_multicast_mode(struct xgbe_prv_data *pdata, 959 unsigned int enable) 960 { 961 unsigned int val = enable ? 1 : 0; 962 963 if (XGMAC_IOREAD_BITS(pdata, MAC_PFR, PM) == val) 964 return 0; 965 966 netif_dbg(pdata, drv, pdata->netdev, "%s allmulti mode\n", 967 enable ? "entering" : "leaving"); 968 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, PM, val); 969 970 return 0; 971 } 972 973 static void xgbe_set_mac_reg(struct xgbe_prv_data *pdata, 974 struct netdev_hw_addr *ha, unsigned int *mac_reg) 975 { 976 unsigned int mac_addr_hi, mac_addr_lo; 977 u8 *mac_addr; 978 979 mac_addr_lo = 0; 980 mac_addr_hi = 0; 981 982 if (ha) { 983 mac_addr = (u8 *)&mac_addr_lo; 984 mac_addr[0] = ha->addr[0]; 985 mac_addr[1] = ha->addr[1]; 986 mac_addr[2] = ha->addr[2]; 987 mac_addr[3] = ha->addr[3]; 988 mac_addr = (u8 *)&mac_addr_hi; 989 mac_addr[0] = ha->addr[4]; 990 mac_addr[1] = ha->addr[5]; 991 992 netif_dbg(pdata, drv, pdata->netdev, 993 "adding mac address %pM at %#x\n", 994 ha->addr, *mac_reg); 995 996 XGMAC_SET_BITS(mac_addr_hi, MAC_MACA1HR, AE, 1); 997 } 998 999 XGMAC_IOWRITE(pdata, *mac_reg, mac_addr_hi); 1000 *mac_reg += MAC_MACA_INC; 1001 XGMAC_IOWRITE(pdata, *mac_reg, mac_addr_lo); 1002 *mac_reg += MAC_MACA_INC; 1003 } 1004 1005 static void xgbe_set_mac_addn_addrs(struct xgbe_prv_data *pdata) 1006 { 1007 struct net_device *netdev = pdata->netdev; 1008 struct netdev_hw_addr *ha; 1009 unsigned int mac_reg; 1010 unsigned int addn_macs; 1011 1012 mac_reg = MAC_MACA1HR; 1013 addn_macs = pdata->hw_feat.addn_mac; 1014 1015 if (netdev_uc_count(netdev) > addn_macs) { 1016 xgbe_set_promiscuous_mode(pdata, 1); 1017 } else { 1018 netdev_for_each_uc_addr(ha, netdev) { 1019 xgbe_set_mac_reg(pdata, ha, &mac_reg); 1020 addn_macs--; 1021 } 1022 1023 if (netdev_mc_count(netdev) > addn_macs) { 1024 xgbe_set_all_multicast_mode(pdata, 1); 1025 } else { 1026 netdev_for_each_mc_addr(ha, netdev) { 1027 xgbe_set_mac_reg(pdata, ha, &mac_reg); 1028 addn_macs--; 1029 } 1030 } 1031 } 1032 1033 /* Clear remaining additional MAC address entries */ 1034 while (addn_macs--) 1035 xgbe_set_mac_reg(pdata, NULL, &mac_reg); 1036 } 1037 1038 static void xgbe_set_mac_hash_table(struct xgbe_prv_data *pdata) 1039 { 1040 struct net_device *netdev = pdata->netdev; 1041 struct netdev_hw_addr *ha; 1042 unsigned int hash_reg; 1043 unsigned int hash_table_shift, hash_table_count; 1044 u32 hash_table[XGBE_MAC_HASH_TABLE_SIZE]; 1045 u32 crc; 1046 unsigned int i; 1047 1048 hash_table_shift = 26 - (pdata->hw_feat.hash_table_size >> 7); 1049 hash_table_count = pdata->hw_feat.hash_table_size / 32; 1050 memset(hash_table, 0, sizeof(hash_table)); 1051 1052 /* Build the MAC Hash Table register values */ 1053 netdev_for_each_uc_addr(ha, netdev) { 1054 crc = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN)); 1055 crc >>= hash_table_shift; 1056 hash_table[crc >> 5] |= (1 << (crc & 0x1f)); 1057 } 1058 1059 netdev_for_each_mc_addr(ha, netdev) { 1060 crc = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN)); 1061 crc >>= hash_table_shift; 1062 hash_table[crc >> 5] |= (1 << (crc & 0x1f)); 1063 } 1064 1065 /* Set the MAC Hash Table registers */ 1066 hash_reg = MAC_HTR0; 1067 for (i = 0; i < hash_table_count; i++) { 1068 XGMAC_IOWRITE(pdata, hash_reg, hash_table[i]); 1069 hash_reg += MAC_HTR_INC; 1070 } 1071 } 1072 1073 static int xgbe_add_mac_addresses(struct xgbe_prv_data *pdata) 1074 { 1075 if (pdata->hw_feat.hash_table_size) 1076 xgbe_set_mac_hash_table(pdata); 1077 else 1078 xgbe_set_mac_addn_addrs(pdata); 1079 1080 return 0; 1081 } 1082 1083 static int xgbe_set_mac_address(struct xgbe_prv_data *pdata, u8 *addr) 1084 { 1085 unsigned int mac_addr_hi, mac_addr_lo; 1086 1087 mac_addr_hi = (addr[5] << 8) | (addr[4] << 0); 1088 mac_addr_lo = (addr[3] << 24) | (addr[2] << 16) | 1089 (addr[1] << 8) | (addr[0] << 0); 1090 1091 XGMAC_IOWRITE(pdata, MAC_MACA0HR, mac_addr_hi); 1092 XGMAC_IOWRITE(pdata, MAC_MACA0LR, mac_addr_lo); 1093 1094 return 0; 1095 } 1096 1097 static int xgbe_config_rx_mode(struct xgbe_prv_data *pdata) 1098 { 1099 struct net_device *netdev = pdata->netdev; 1100 unsigned int pr_mode, am_mode; 1101 1102 pr_mode = ((netdev->flags & IFF_PROMISC) != 0); 1103 am_mode = ((netdev->flags & IFF_ALLMULTI) != 0); 1104 1105 xgbe_set_promiscuous_mode(pdata, pr_mode); 1106 xgbe_set_all_multicast_mode(pdata, am_mode); 1107 1108 xgbe_add_mac_addresses(pdata); 1109 1110 return 0; 1111 } 1112 1113 static int xgbe_clr_gpio(struct xgbe_prv_data *pdata, unsigned int gpio) 1114 { 1115 unsigned int reg; 1116 1117 if (gpio > 15) 1118 return -EINVAL; 1119 1120 reg = XGMAC_IOREAD(pdata, MAC_GPIOSR); 1121 1122 reg &= ~(1 << (gpio + 16)); 1123 XGMAC_IOWRITE(pdata, MAC_GPIOSR, reg); 1124 1125 return 0; 1126 } 1127 1128 static int xgbe_set_gpio(struct xgbe_prv_data *pdata, unsigned int gpio) 1129 { 1130 unsigned int reg; 1131 1132 if (gpio > 15) 1133 return -EINVAL; 1134 1135 reg = XGMAC_IOREAD(pdata, MAC_GPIOSR); 1136 1137 reg |= (1 << (gpio + 16)); 1138 XGMAC_IOWRITE(pdata, MAC_GPIOSR, reg); 1139 1140 return 0; 1141 } 1142 1143 static int xgbe_read_mmd_regs_v2(struct xgbe_prv_data *pdata, int prtad, 1144 int mmd_reg) 1145 { 1146 unsigned long flags; 1147 unsigned int mmd_address, index, offset; 1148 int mmd_data; 1149 1150 if (mmd_reg & MII_ADDR_C45) 1151 mmd_address = mmd_reg & ~MII_ADDR_C45; 1152 else 1153 mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff); 1154 1155 /* The PCS registers are accessed using mmio. The underlying 1156 * management interface uses indirect addressing to access the MMD 1157 * register sets. This requires accessing of the PCS register in two 1158 * phases, an address phase and a data phase. 1159 * 1160 * The mmio interface is based on 16-bit offsets and values. All 1161 * register offsets must therefore be adjusted by left shifting the 1162 * offset 1 bit and reading 16 bits of data. 1163 */ 1164 mmd_address <<= 1; 1165 index = mmd_address & ~pdata->xpcs_window_mask; 1166 offset = pdata->xpcs_window + (mmd_address & pdata->xpcs_window_mask); 1167 1168 spin_lock_irqsave(&pdata->xpcs_lock, flags); 1169 XPCS32_IOWRITE(pdata, pdata->xpcs_window_sel_reg, index); 1170 mmd_data = XPCS16_IOREAD(pdata, offset); 1171 spin_unlock_irqrestore(&pdata->xpcs_lock, flags); 1172 1173 return mmd_data; 1174 } 1175 1176 static void xgbe_write_mmd_regs_v2(struct xgbe_prv_data *pdata, int prtad, 1177 int mmd_reg, int mmd_data) 1178 { 1179 unsigned long flags; 1180 unsigned int mmd_address, index, offset; 1181 1182 if (mmd_reg & MII_ADDR_C45) 1183 mmd_address = mmd_reg & ~MII_ADDR_C45; 1184 else 1185 mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff); 1186 1187 /* The PCS registers are accessed using mmio. The underlying 1188 * management interface uses indirect addressing to access the MMD 1189 * register sets. This requires accessing of the PCS register in two 1190 * phases, an address phase and a data phase. 1191 * 1192 * The mmio interface is based on 16-bit offsets and values. All 1193 * register offsets must therefore be adjusted by left shifting the 1194 * offset 1 bit and writing 16 bits of data. 1195 */ 1196 mmd_address <<= 1; 1197 index = mmd_address & ~pdata->xpcs_window_mask; 1198 offset = pdata->xpcs_window + (mmd_address & pdata->xpcs_window_mask); 1199 1200 spin_lock_irqsave(&pdata->xpcs_lock, flags); 1201 XPCS32_IOWRITE(pdata, pdata->xpcs_window_sel_reg, index); 1202 XPCS16_IOWRITE(pdata, offset, mmd_data); 1203 spin_unlock_irqrestore(&pdata->xpcs_lock, flags); 1204 } 1205 1206 static int xgbe_read_mmd_regs_v1(struct xgbe_prv_data *pdata, int prtad, 1207 int mmd_reg) 1208 { 1209 unsigned long flags; 1210 unsigned int mmd_address; 1211 int mmd_data; 1212 1213 if (mmd_reg & MII_ADDR_C45) 1214 mmd_address = mmd_reg & ~MII_ADDR_C45; 1215 else 1216 mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff); 1217 1218 /* The PCS registers are accessed using mmio. The underlying APB3 1219 * management interface uses indirect addressing to access the MMD 1220 * register sets. This requires accessing of the PCS register in two 1221 * phases, an address phase and a data phase. 1222 * 1223 * The mmio interface is based on 32-bit offsets and values. All 1224 * register offsets must therefore be adjusted by left shifting the 1225 * offset 2 bits and reading 32 bits of data. 1226 */ 1227 spin_lock_irqsave(&pdata->xpcs_lock, flags); 1228 XPCS32_IOWRITE(pdata, PCS_V1_WINDOW_SELECT, mmd_address >> 8); 1229 mmd_data = XPCS32_IOREAD(pdata, (mmd_address & 0xff) << 2); 1230 spin_unlock_irqrestore(&pdata->xpcs_lock, flags); 1231 1232 return mmd_data; 1233 } 1234 1235 static void xgbe_write_mmd_regs_v1(struct xgbe_prv_data *pdata, int prtad, 1236 int mmd_reg, int mmd_data) 1237 { 1238 unsigned int mmd_address; 1239 unsigned long flags; 1240 1241 if (mmd_reg & MII_ADDR_C45) 1242 mmd_address = mmd_reg & ~MII_ADDR_C45; 1243 else 1244 mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff); 1245 1246 /* The PCS registers are accessed using mmio. The underlying APB3 1247 * management interface uses indirect addressing to access the MMD 1248 * register sets. This requires accessing of the PCS register in two 1249 * phases, an address phase and a data phase. 1250 * 1251 * The mmio interface is based on 32-bit offsets and values. All 1252 * register offsets must therefore be adjusted by left shifting the 1253 * offset 2 bits and writing 32 bits of data. 1254 */ 1255 spin_lock_irqsave(&pdata->xpcs_lock, flags); 1256 XPCS32_IOWRITE(pdata, PCS_V1_WINDOW_SELECT, mmd_address >> 8); 1257 XPCS32_IOWRITE(pdata, (mmd_address & 0xff) << 2, mmd_data); 1258 spin_unlock_irqrestore(&pdata->xpcs_lock, flags); 1259 } 1260 1261 static int xgbe_read_mmd_regs(struct xgbe_prv_data *pdata, int prtad, 1262 int mmd_reg) 1263 { 1264 switch (pdata->vdata->xpcs_access) { 1265 case XGBE_XPCS_ACCESS_V1: 1266 return xgbe_read_mmd_regs_v1(pdata, prtad, mmd_reg); 1267 1268 case XGBE_XPCS_ACCESS_V2: 1269 default: 1270 return xgbe_read_mmd_regs_v2(pdata, prtad, mmd_reg); 1271 } 1272 } 1273 1274 static void xgbe_write_mmd_regs(struct xgbe_prv_data *pdata, int prtad, 1275 int mmd_reg, int mmd_data) 1276 { 1277 switch (pdata->vdata->xpcs_access) { 1278 case XGBE_XPCS_ACCESS_V1: 1279 return xgbe_write_mmd_regs_v1(pdata, prtad, mmd_reg, mmd_data); 1280 1281 case XGBE_XPCS_ACCESS_V2: 1282 default: 1283 return xgbe_write_mmd_regs_v2(pdata, prtad, mmd_reg, mmd_data); 1284 } 1285 } 1286 1287 static unsigned int xgbe_create_mdio_sca(int port, int reg) 1288 { 1289 unsigned int mdio_sca, da; 1290 1291 da = (reg & MII_ADDR_C45) ? reg >> 16 : 0; 1292 1293 mdio_sca = 0; 1294 XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, RA, reg); 1295 XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, PA, port); 1296 XGMAC_SET_BITS(mdio_sca, MAC_MDIOSCAR, DA, da); 1297 1298 return mdio_sca; 1299 } 1300 1301 static int xgbe_write_ext_mii_regs(struct xgbe_prv_data *pdata, int addr, 1302 int reg, u16 val) 1303 { 1304 unsigned int mdio_sca, mdio_sccd; 1305 1306 reinit_completion(&pdata->mdio_complete); 1307 1308 mdio_sca = xgbe_create_mdio_sca(addr, reg); 1309 XGMAC_IOWRITE(pdata, MAC_MDIOSCAR, mdio_sca); 1310 1311 mdio_sccd = 0; 1312 XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, DATA, val); 1313 XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, CMD, 1); 1314 XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, BUSY, 1); 1315 XGMAC_IOWRITE(pdata, MAC_MDIOSCCDR, mdio_sccd); 1316 1317 if (!wait_for_completion_timeout(&pdata->mdio_complete, HZ)) { 1318 netdev_err(pdata->netdev, "mdio write operation timed out\n"); 1319 return -ETIMEDOUT; 1320 } 1321 1322 return 0; 1323 } 1324 1325 static int xgbe_read_ext_mii_regs(struct xgbe_prv_data *pdata, int addr, 1326 int reg) 1327 { 1328 unsigned int mdio_sca, mdio_sccd; 1329 1330 reinit_completion(&pdata->mdio_complete); 1331 1332 mdio_sca = xgbe_create_mdio_sca(addr, reg); 1333 XGMAC_IOWRITE(pdata, MAC_MDIOSCAR, mdio_sca); 1334 1335 mdio_sccd = 0; 1336 XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, CMD, 3); 1337 XGMAC_SET_BITS(mdio_sccd, MAC_MDIOSCCDR, BUSY, 1); 1338 XGMAC_IOWRITE(pdata, MAC_MDIOSCCDR, mdio_sccd); 1339 1340 if (!wait_for_completion_timeout(&pdata->mdio_complete, HZ)) { 1341 netdev_err(pdata->netdev, "mdio read operation timed out\n"); 1342 return -ETIMEDOUT; 1343 } 1344 1345 return XGMAC_IOREAD_BITS(pdata, MAC_MDIOSCCDR, DATA); 1346 } 1347 1348 static int xgbe_set_ext_mii_mode(struct xgbe_prv_data *pdata, unsigned int port, 1349 enum xgbe_mdio_mode mode) 1350 { 1351 unsigned int reg_val = XGMAC_IOREAD(pdata, MAC_MDIOCL22R); 1352 1353 switch (mode) { 1354 case XGBE_MDIO_MODE_CL22: 1355 if (port > XGMAC_MAX_C22_PORT) 1356 return -EINVAL; 1357 reg_val |= (1 << port); 1358 break; 1359 case XGBE_MDIO_MODE_CL45: 1360 break; 1361 default: 1362 return -EINVAL; 1363 } 1364 1365 XGMAC_IOWRITE(pdata, MAC_MDIOCL22R, reg_val); 1366 1367 return 0; 1368 } 1369 1370 static int xgbe_tx_complete(struct xgbe_ring_desc *rdesc) 1371 { 1372 return !XGMAC_GET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN); 1373 } 1374 1375 static int xgbe_disable_rx_csum(struct xgbe_prv_data *pdata) 1376 { 1377 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, IPC, 0); 1378 1379 return 0; 1380 } 1381 1382 static int xgbe_enable_rx_csum(struct xgbe_prv_data *pdata) 1383 { 1384 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, IPC, 1); 1385 1386 return 0; 1387 } 1388 1389 static void xgbe_tx_desc_reset(struct xgbe_ring_data *rdata) 1390 { 1391 struct xgbe_ring_desc *rdesc = rdata->rdesc; 1392 1393 /* Reset the Tx descriptor 1394 * Set buffer 1 (lo) address to zero 1395 * Set buffer 1 (hi) address to zero 1396 * Reset all other control bits (IC, TTSE, B2L & B1L) 1397 * Reset all other control bits (OWN, CTXT, FD, LD, CPC, CIC, etc) 1398 */ 1399 rdesc->desc0 = 0; 1400 rdesc->desc1 = 0; 1401 rdesc->desc2 = 0; 1402 rdesc->desc3 = 0; 1403 1404 /* Make sure ownership is written to the descriptor */ 1405 dma_wmb(); 1406 } 1407 1408 static void xgbe_tx_desc_init(struct xgbe_channel *channel) 1409 { 1410 struct xgbe_ring *ring = channel->tx_ring; 1411 struct xgbe_ring_data *rdata; 1412 int i; 1413 int start_index = ring->cur; 1414 1415 DBGPR("-->tx_desc_init\n"); 1416 1417 /* Initialze all descriptors */ 1418 for (i = 0; i < ring->rdesc_count; i++) { 1419 rdata = XGBE_GET_DESC_DATA(ring, i); 1420 1421 /* Initialize Tx descriptor */ 1422 xgbe_tx_desc_reset(rdata); 1423 } 1424 1425 /* Update the total number of Tx descriptors */ 1426 XGMAC_DMA_IOWRITE(channel, DMA_CH_TDRLR, ring->rdesc_count - 1); 1427 1428 /* Update the starting address of descriptor ring */ 1429 rdata = XGBE_GET_DESC_DATA(ring, start_index); 1430 XGMAC_DMA_IOWRITE(channel, DMA_CH_TDLR_HI, 1431 upper_32_bits(rdata->rdesc_dma)); 1432 XGMAC_DMA_IOWRITE(channel, DMA_CH_TDLR_LO, 1433 lower_32_bits(rdata->rdesc_dma)); 1434 1435 DBGPR("<--tx_desc_init\n"); 1436 } 1437 1438 static void xgbe_rx_desc_reset(struct xgbe_prv_data *pdata, 1439 struct xgbe_ring_data *rdata, unsigned int index) 1440 { 1441 struct xgbe_ring_desc *rdesc = rdata->rdesc; 1442 unsigned int rx_usecs = pdata->rx_usecs; 1443 unsigned int rx_frames = pdata->rx_frames; 1444 unsigned int inte; 1445 dma_addr_t hdr_dma, buf_dma; 1446 1447 if (!rx_usecs && !rx_frames) { 1448 /* No coalescing, interrupt for every descriptor */ 1449 inte = 1; 1450 } else { 1451 /* Set interrupt based on Rx frame coalescing setting */ 1452 if (rx_frames && !((index + 1) % rx_frames)) 1453 inte = 1; 1454 else 1455 inte = 0; 1456 } 1457 1458 /* Reset the Rx descriptor 1459 * Set buffer 1 (lo) address to header dma address (lo) 1460 * Set buffer 1 (hi) address to header dma address (hi) 1461 * Set buffer 2 (lo) address to buffer dma address (lo) 1462 * Set buffer 2 (hi) address to buffer dma address (hi) and 1463 * set control bits OWN and INTE 1464 */ 1465 hdr_dma = rdata->rx.hdr.dma_base + rdata->rx.hdr.dma_off; 1466 buf_dma = rdata->rx.buf.dma_base + rdata->rx.buf.dma_off; 1467 rdesc->desc0 = cpu_to_le32(lower_32_bits(hdr_dma)); 1468 rdesc->desc1 = cpu_to_le32(upper_32_bits(hdr_dma)); 1469 rdesc->desc2 = cpu_to_le32(lower_32_bits(buf_dma)); 1470 rdesc->desc3 = cpu_to_le32(upper_32_bits(buf_dma)); 1471 1472 XGMAC_SET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, INTE, inte); 1473 1474 /* Since the Rx DMA engine is likely running, make sure everything 1475 * is written to the descriptor(s) before setting the OWN bit 1476 * for the descriptor 1477 */ 1478 dma_wmb(); 1479 1480 XGMAC_SET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, OWN, 1); 1481 1482 /* Make sure ownership is written to the descriptor */ 1483 dma_wmb(); 1484 } 1485 1486 static void xgbe_rx_desc_init(struct xgbe_channel *channel) 1487 { 1488 struct xgbe_prv_data *pdata = channel->pdata; 1489 struct xgbe_ring *ring = channel->rx_ring; 1490 struct xgbe_ring_data *rdata; 1491 unsigned int start_index = ring->cur; 1492 unsigned int i; 1493 1494 DBGPR("-->rx_desc_init\n"); 1495 1496 /* Initialize all descriptors */ 1497 for (i = 0; i < ring->rdesc_count; i++) { 1498 rdata = XGBE_GET_DESC_DATA(ring, i); 1499 1500 /* Initialize Rx descriptor */ 1501 xgbe_rx_desc_reset(pdata, rdata, i); 1502 } 1503 1504 /* Update the total number of Rx descriptors */ 1505 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDRLR, ring->rdesc_count - 1); 1506 1507 /* Update the starting address of descriptor ring */ 1508 rdata = XGBE_GET_DESC_DATA(ring, start_index); 1509 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDLR_HI, 1510 upper_32_bits(rdata->rdesc_dma)); 1511 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDLR_LO, 1512 lower_32_bits(rdata->rdesc_dma)); 1513 1514 /* Update the Rx Descriptor Tail Pointer */ 1515 rdata = XGBE_GET_DESC_DATA(ring, start_index + ring->rdesc_count - 1); 1516 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO, 1517 lower_32_bits(rdata->rdesc_dma)); 1518 1519 DBGPR("<--rx_desc_init\n"); 1520 } 1521 1522 static void xgbe_update_tstamp_addend(struct xgbe_prv_data *pdata, 1523 unsigned int addend) 1524 { 1525 unsigned int count = 10000; 1526 1527 /* Set the addend register value and tell the device */ 1528 XGMAC_IOWRITE(pdata, MAC_TSAR, addend); 1529 XGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSADDREG, 1); 1530 1531 /* Wait for addend update to complete */ 1532 while (--count && XGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSADDREG)) 1533 udelay(5); 1534 1535 if (!count) 1536 netdev_err(pdata->netdev, 1537 "timed out updating timestamp addend register\n"); 1538 } 1539 1540 static void xgbe_set_tstamp_time(struct xgbe_prv_data *pdata, unsigned int sec, 1541 unsigned int nsec) 1542 { 1543 unsigned int count = 10000; 1544 1545 /* Set the time values and tell the device */ 1546 XGMAC_IOWRITE(pdata, MAC_STSUR, sec); 1547 XGMAC_IOWRITE(pdata, MAC_STNUR, nsec); 1548 XGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSINIT, 1); 1549 1550 /* Wait for time update to complete */ 1551 while (--count && XGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSINIT)) 1552 udelay(5); 1553 1554 if (!count) 1555 netdev_err(pdata->netdev, "timed out initializing timestamp\n"); 1556 } 1557 1558 static u64 xgbe_get_tstamp_time(struct xgbe_prv_data *pdata) 1559 { 1560 u64 nsec; 1561 1562 nsec = XGMAC_IOREAD(pdata, MAC_STSR); 1563 nsec *= NSEC_PER_SEC; 1564 nsec += XGMAC_IOREAD(pdata, MAC_STNR); 1565 1566 return nsec; 1567 } 1568 1569 static u64 xgbe_get_tx_tstamp(struct xgbe_prv_data *pdata) 1570 { 1571 unsigned int tx_snr, tx_ssr; 1572 u64 nsec; 1573 1574 if (pdata->vdata->tx_tstamp_workaround) { 1575 tx_snr = XGMAC_IOREAD(pdata, MAC_TXSNR); 1576 tx_ssr = XGMAC_IOREAD(pdata, MAC_TXSSR); 1577 } else { 1578 tx_ssr = XGMAC_IOREAD(pdata, MAC_TXSSR); 1579 tx_snr = XGMAC_IOREAD(pdata, MAC_TXSNR); 1580 } 1581 1582 if (XGMAC_GET_BITS(tx_snr, MAC_TXSNR, TXTSSTSMIS)) 1583 return 0; 1584 1585 nsec = tx_ssr; 1586 nsec *= NSEC_PER_SEC; 1587 nsec += tx_snr; 1588 1589 return nsec; 1590 } 1591 1592 static void xgbe_get_rx_tstamp(struct xgbe_packet_data *packet, 1593 struct xgbe_ring_desc *rdesc) 1594 { 1595 u64 nsec; 1596 1597 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_CONTEXT_DESC3, TSA) && 1598 !XGMAC_GET_BITS_LE(rdesc->desc3, RX_CONTEXT_DESC3, TSD)) { 1599 nsec = le32_to_cpu(rdesc->desc1); 1600 nsec <<= 32; 1601 nsec |= le32_to_cpu(rdesc->desc0); 1602 if (nsec != 0xffffffffffffffffULL) { 1603 packet->rx_tstamp = nsec; 1604 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1605 RX_TSTAMP, 1); 1606 } 1607 } 1608 } 1609 1610 static int xgbe_config_tstamp(struct xgbe_prv_data *pdata, 1611 unsigned int mac_tscr) 1612 { 1613 /* Set one nano-second accuracy */ 1614 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCTRLSSR, 1); 1615 1616 /* Set fine timestamp update */ 1617 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 1); 1618 1619 /* Overwrite earlier timestamps */ 1620 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TXTSSTSM, 1); 1621 1622 XGMAC_IOWRITE(pdata, MAC_TSCR, mac_tscr); 1623 1624 /* Exit if timestamping is not enabled */ 1625 if (!XGMAC_GET_BITS(mac_tscr, MAC_TSCR, TSENA)) 1626 return 0; 1627 1628 /* Initialize time registers */ 1629 XGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SSINC, XGBE_TSTAMP_SSINC); 1630 XGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SNSINC, XGBE_TSTAMP_SNSINC); 1631 xgbe_update_tstamp_addend(pdata, pdata->tstamp_addend); 1632 xgbe_set_tstamp_time(pdata, 0, 0); 1633 1634 /* Initialize the timecounter */ 1635 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, 1636 ktime_to_ns(ktime_get_real())); 1637 1638 return 0; 1639 } 1640 1641 static void xgbe_tx_start_xmit(struct xgbe_channel *channel, 1642 struct xgbe_ring *ring) 1643 { 1644 struct xgbe_prv_data *pdata = channel->pdata; 1645 struct xgbe_ring_data *rdata; 1646 1647 /* Make sure everything is written before the register write */ 1648 wmb(); 1649 1650 /* Issue a poll command to Tx DMA by writing address 1651 * of next immediate free descriptor */ 1652 rdata = XGBE_GET_DESC_DATA(ring, ring->cur); 1653 XGMAC_DMA_IOWRITE(channel, DMA_CH_TDTR_LO, 1654 lower_32_bits(rdata->rdesc_dma)); 1655 1656 /* Start the Tx timer */ 1657 if (pdata->tx_usecs && !channel->tx_timer_active) { 1658 channel->tx_timer_active = 1; 1659 mod_timer(&channel->tx_timer, 1660 jiffies + usecs_to_jiffies(pdata->tx_usecs)); 1661 } 1662 1663 ring->tx.xmit_more = 0; 1664 } 1665 1666 static void xgbe_dev_xmit(struct xgbe_channel *channel) 1667 { 1668 struct xgbe_prv_data *pdata = channel->pdata; 1669 struct xgbe_ring *ring = channel->tx_ring; 1670 struct xgbe_ring_data *rdata; 1671 struct xgbe_ring_desc *rdesc; 1672 struct xgbe_packet_data *packet = &ring->packet_data; 1673 unsigned int tx_packets, tx_bytes; 1674 unsigned int csum, tso, vlan, vxlan; 1675 unsigned int tso_context, vlan_context; 1676 unsigned int tx_set_ic; 1677 int start_index = ring->cur; 1678 int cur_index = ring->cur; 1679 int i; 1680 1681 DBGPR("-->xgbe_dev_xmit\n"); 1682 1683 tx_packets = packet->tx_packets; 1684 tx_bytes = packet->tx_bytes; 1685 1686 csum = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1687 CSUM_ENABLE); 1688 tso = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1689 TSO_ENABLE); 1690 vlan = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1691 VLAN_CTAG); 1692 vxlan = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1693 VXLAN); 1694 1695 if (tso && (packet->mss != ring->tx.cur_mss)) 1696 tso_context = 1; 1697 else 1698 tso_context = 0; 1699 1700 if (vlan && (packet->vlan_ctag != ring->tx.cur_vlan_ctag)) 1701 vlan_context = 1; 1702 else 1703 vlan_context = 0; 1704 1705 /* Determine if an interrupt should be generated for this Tx: 1706 * Interrupt: 1707 * - Tx frame count exceeds the frame count setting 1708 * - Addition of Tx frame count to the frame count since the 1709 * last interrupt was set exceeds the frame count setting 1710 * No interrupt: 1711 * - No frame count setting specified (ethtool -C ethX tx-frames 0) 1712 * - Addition of Tx frame count to the frame count since the 1713 * last interrupt was set does not exceed the frame count setting 1714 */ 1715 ring->coalesce_count += tx_packets; 1716 if (!pdata->tx_frames) 1717 tx_set_ic = 0; 1718 else if (tx_packets > pdata->tx_frames) 1719 tx_set_ic = 1; 1720 else if ((ring->coalesce_count % pdata->tx_frames) < tx_packets) 1721 tx_set_ic = 1; 1722 else 1723 tx_set_ic = 0; 1724 1725 rdata = XGBE_GET_DESC_DATA(ring, cur_index); 1726 rdesc = rdata->rdesc; 1727 1728 /* Create a context descriptor if this is a TSO packet */ 1729 if (tso_context || vlan_context) { 1730 if (tso_context) { 1731 netif_dbg(pdata, tx_queued, pdata->netdev, 1732 "TSO context descriptor, mss=%u\n", 1733 packet->mss); 1734 1735 /* Set the MSS size */ 1736 XGMAC_SET_BITS_LE(rdesc->desc2, TX_CONTEXT_DESC2, 1737 MSS, packet->mss); 1738 1739 /* Mark it as a CONTEXT descriptor */ 1740 XGMAC_SET_BITS_LE(rdesc->desc3, TX_CONTEXT_DESC3, 1741 CTXT, 1); 1742 1743 /* Indicate this descriptor contains the MSS */ 1744 XGMAC_SET_BITS_LE(rdesc->desc3, TX_CONTEXT_DESC3, 1745 TCMSSV, 1); 1746 1747 ring->tx.cur_mss = packet->mss; 1748 } 1749 1750 if (vlan_context) { 1751 netif_dbg(pdata, tx_queued, pdata->netdev, 1752 "VLAN context descriptor, ctag=%u\n", 1753 packet->vlan_ctag); 1754 1755 /* Mark it as a CONTEXT descriptor */ 1756 XGMAC_SET_BITS_LE(rdesc->desc3, TX_CONTEXT_DESC3, 1757 CTXT, 1); 1758 1759 /* Set the VLAN tag */ 1760 XGMAC_SET_BITS_LE(rdesc->desc3, TX_CONTEXT_DESC3, 1761 VT, packet->vlan_ctag); 1762 1763 /* Indicate this descriptor contains the VLAN tag */ 1764 XGMAC_SET_BITS_LE(rdesc->desc3, TX_CONTEXT_DESC3, 1765 VLTV, 1); 1766 1767 ring->tx.cur_vlan_ctag = packet->vlan_ctag; 1768 } 1769 1770 cur_index++; 1771 rdata = XGBE_GET_DESC_DATA(ring, cur_index); 1772 rdesc = rdata->rdesc; 1773 } 1774 1775 /* Update buffer address (for TSO this is the header) */ 1776 rdesc->desc0 = cpu_to_le32(lower_32_bits(rdata->skb_dma)); 1777 rdesc->desc1 = cpu_to_le32(upper_32_bits(rdata->skb_dma)); 1778 1779 /* Update the buffer length */ 1780 XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, HL_B1L, 1781 rdata->skb_dma_len); 1782 1783 /* VLAN tag insertion check */ 1784 if (vlan) 1785 XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, VTIR, 1786 TX_NORMAL_DESC2_VLAN_INSERT); 1787 1788 /* Timestamp enablement check */ 1789 if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) 1790 XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, TTSE, 1); 1791 1792 /* Mark it as First Descriptor */ 1793 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, FD, 1); 1794 1795 /* Mark it as a NORMAL descriptor */ 1796 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, CTXT, 0); 1797 1798 /* Set OWN bit if not the first descriptor */ 1799 if (cur_index != start_index) 1800 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN, 1); 1801 1802 if (tso) { 1803 /* Enable TSO */ 1804 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, TSE, 1); 1805 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, TCPPL, 1806 packet->tcp_payload_len); 1807 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, TCPHDRLEN, 1808 packet->tcp_header_len / 4); 1809 1810 pdata->ext_stats.tx_tso_packets += tx_packets; 1811 } else { 1812 /* Enable CRC and Pad Insertion */ 1813 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, CPC, 0); 1814 1815 /* Enable HW CSUM */ 1816 if (csum) 1817 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, 1818 CIC, 0x3); 1819 1820 /* Set the total length to be transmitted */ 1821 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, FL, 1822 packet->length); 1823 } 1824 1825 if (vxlan) { 1826 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, VNP, 1827 TX_NORMAL_DESC3_VXLAN_PACKET); 1828 1829 pdata->ext_stats.tx_vxlan_packets += packet->tx_packets; 1830 } 1831 1832 for (i = cur_index - start_index + 1; i < packet->rdesc_count; i++) { 1833 cur_index++; 1834 rdata = XGBE_GET_DESC_DATA(ring, cur_index); 1835 rdesc = rdata->rdesc; 1836 1837 /* Update buffer address */ 1838 rdesc->desc0 = cpu_to_le32(lower_32_bits(rdata->skb_dma)); 1839 rdesc->desc1 = cpu_to_le32(upper_32_bits(rdata->skb_dma)); 1840 1841 /* Update the buffer length */ 1842 XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, HL_B1L, 1843 rdata->skb_dma_len); 1844 1845 /* Set OWN bit */ 1846 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN, 1); 1847 1848 /* Mark it as NORMAL descriptor */ 1849 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, CTXT, 0); 1850 1851 /* Enable HW CSUM */ 1852 if (csum) 1853 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, 1854 CIC, 0x3); 1855 } 1856 1857 /* Set LAST bit for the last descriptor */ 1858 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, LD, 1); 1859 1860 /* Set IC bit based on Tx coalescing settings */ 1861 if (tx_set_ic) 1862 XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, IC, 1); 1863 1864 /* Save the Tx info to report back during cleanup */ 1865 rdata->tx.packets = tx_packets; 1866 rdata->tx.bytes = tx_bytes; 1867 1868 pdata->ext_stats.txq_packets[channel->queue_index] += tx_packets; 1869 pdata->ext_stats.txq_bytes[channel->queue_index] += tx_bytes; 1870 1871 /* In case the Tx DMA engine is running, make sure everything 1872 * is written to the descriptor(s) before setting the OWN bit 1873 * for the first descriptor 1874 */ 1875 dma_wmb(); 1876 1877 /* Set OWN bit for the first descriptor */ 1878 rdata = XGBE_GET_DESC_DATA(ring, start_index); 1879 rdesc = rdata->rdesc; 1880 XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN, 1); 1881 1882 if (netif_msg_tx_queued(pdata)) 1883 xgbe_dump_tx_desc(pdata, ring, start_index, 1884 packet->rdesc_count, 1); 1885 1886 /* Make sure ownership is written to the descriptor */ 1887 smp_wmb(); 1888 1889 ring->cur = cur_index + 1; 1890 if (!netdev_xmit_more() || 1891 netif_xmit_stopped(netdev_get_tx_queue(pdata->netdev, 1892 channel->queue_index))) 1893 xgbe_tx_start_xmit(channel, ring); 1894 else 1895 ring->tx.xmit_more = 1; 1896 1897 DBGPR(" %s: descriptors %u to %u written\n", 1898 channel->name, start_index & (ring->rdesc_count - 1), 1899 (ring->cur - 1) & (ring->rdesc_count - 1)); 1900 1901 DBGPR("<--xgbe_dev_xmit\n"); 1902 } 1903 1904 static int xgbe_dev_read(struct xgbe_channel *channel) 1905 { 1906 struct xgbe_prv_data *pdata = channel->pdata; 1907 struct xgbe_ring *ring = channel->rx_ring; 1908 struct xgbe_ring_data *rdata; 1909 struct xgbe_ring_desc *rdesc; 1910 struct xgbe_packet_data *packet = &ring->packet_data; 1911 struct net_device *netdev = pdata->netdev; 1912 unsigned int err, etlt, l34t; 1913 1914 DBGPR("-->xgbe_dev_read: cur = %d\n", ring->cur); 1915 1916 rdata = XGBE_GET_DESC_DATA(ring, ring->cur); 1917 rdesc = rdata->rdesc; 1918 1919 /* Check for data availability */ 1920 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, OWN)) 1921 return 1; 1922 1923 /* Make sure descriptor fields are read after reading the OWN bit */ 1924 dma_rmb(); 1925 1926 if (netif_msg_rx_status(pdata)) 1927 xgbe_dump_rx_desc(pdata, ring, ring->cur); 1928 1929 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, CTXT)) { 1930 /* Timestamp Context Descriptor */ 1931 xgbe_get_rx_tstamp(packet, rdesc); 1932 1933 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1934 CONTEXT, 1); 1935 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1936 CONTEXT_NEXT, 0); 1937 return 0; 1938 } 1939 1940 /* Normal Descriptor, be sure Context Descriptor bit is off */ 1941 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, CONTEXT, 0); 1942 1943 /* Indicate if a Context Descriptor is next */ 1944 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, CDA)) 1945 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1946 CONTEXT_NEXT, 1); 1947 1948 /* Get the header length */ 1949 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, FD)) { 1950 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1951 FIRST, 1); 1952 rdata->rx.hdr_len = XGMAC_GET_BITS_LE(rdesc->desc2, 1953 RX_NORMAL_DESC2, HL); 1954 if (rdata->rx.hdr_len) 1955 pdata->ext_stats.rx_split_header_packets++; 1956 } else { 1957 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1958 FIRST, 0); 1959 } 1960 1961 /* Get the RSS hash */ 1962 if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, RSV)) { 1963 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1964 RSS_HASH, 1); 1965 1966 packet->rss_hash = le32_to_cpu(rdesc->desc1); 1967 1968 l34t = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, L34T); 1969 switch (l34t) { 1970 case RX_DESC3_L34T_IPV4_TCP: 1971 case RX_DESC3_L34T_IPV4_UDP: 1972 case RX_DESC3_L34T_IPV6_TCP: 1973 case RX_DESC3_L34T_IPV6_UDP: 1974 packet->rss_hash_type = PKT_HASH_TYPE_L4; 1975 break; 1976 default: 1977 packet->rss_hash_type = PKT_HASH_TYPE_L3; 1978 } 1979 } 1980 1981 /* Not all the data has been transferred for this packet */ 1982 if (!XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, LD)) 1983 return 0; 1984 1985 /* This is the last of the data for this packet */ 1986 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1987 LAST, 1); 1988 1989 /* Get the packet length */ 1990 rdata->rx.len = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, PL); 1991 1992 /* Set checksum done indicator as appropriate */ 1993 if (netdev->features & NETIF_F_RXCSUM) { 1994 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1995 CSUM_DONE, 1); 1996 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 1997 TNPCSUM_DONE, 1); 1998 } 1999 2000 /* Set the tunneled packet indicator */ 2001 if (XGMAC_GET_BITS_LE(rdesc->desc2, RX_NORMAL_DESC2, TNP)) { 2002 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2003 TNP, 1); 2004 pdata->ext_stats.rx_vxlan_packets++; 2005 2006 l34t = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, L34T); 2007 switch (l34t) { 2008 case RX_DESC3_L34T_IPV4_UNKNOWN: 2009 case RX_DESC3_L34T_IPV6_UNKNOWN: 2010 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2011 TNPCSUM_DONE, 0); 2012 break; 2013 } 2014 } 2015 2016 /* Check for errors (only valid in last descriptor) */ 2017 err = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, ES); 2018 etlt = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, ETLT); 2019 netif_dbg(pdata, rx_status, netdev, "err=%u, etlt=%#x\n", err, etlt); 2020 2021 if (!err || !etlt) { 2022 /* No error if err is 0 or etlt is 0 */ 2023 if ((etlt == 0x09) && 2024 (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)) { 2025 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2026 VLAN_CTAG, 1); 2027 packet->vlan_ctag = XGMAC_GET_BITS_LE(rdesc->desc0, 2028 RX_NORMAL_DESC0, 2029 OVT); 2030 netif_dbg(pdata, rx_status, netdev, "vlan-ctag=%#06x\n", 2031 packet->vlan_ctag); 2032 } 2033 } else { 2034 unsigned int tnp = XGMAC_GET_BITS(packet->attributes, 2035 RX_PACKET_ATTRIBUTES, TNP); 2036 2037 if ((etlt == 0x05) || (etlt == 0x06)) { 2038 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2039 CSUM_DONE, 0); 2040 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2041 TNPCSUM_DONE, 0); 2042 pdata->ext_stats.rx_csum_errors++; 2043 } else if (tnp && ((etlt == 0x09) || (etlt == 0x0a))) { 2044 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2045 CSUM_DONE, 0); 2046 XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2047 TNPCSUM_DONE, 0); 2048 pdata->ext_stats.rx_vxlan_csum_errors++; 2049 } else { 2050 XGMAC_SET_BITS(packet->errors, RX_PACKET_ERRORS, 2051 FRAME, 1); 2052 } 2053 } 2054 2055 pdata->ext_stats.rxq_packets[channel->queue_index]++; 2056 pdata->ext_stats.rxq_bytes[channel->queue_index] += rdata->rx.len; 2057 2058 DBGPR("<--xgbe_dev_read: %s - descriptor=%u (cur=%d)\n", channel->name, 2059 ring->cur & (ring->rdesc_count - 1), ring->cur); 2060 2061 return 0; 2062 } 2063 2064 static int xgbe_is_context_desc(struct xgbe_ring_desc *rdesc) 2065 { 2066 /* Rx and Tx share CTXT bit, so check TDES3.CTXT bit */ 2067 return XGMAC_GET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, CTXT); 2068 } 2069 2070 static int xgbe_is_last_desc(struct xgbe_ring_desc *rdesc) 2071 { 2072 /* Rx and Tx share LD bit, so check TDES3.LD bit */ 2073 return XGMAC_GET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, LD); 2074 } 2075 2076 static int xgbe_enable_int(struct xgbe_channel *channel, 2077 enum xgbe_int int_id) 2078 { 2079 switch (int_id) { 2080 case XGMAC_INT_DMA_CH_SR_TI: 2081 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TIE, 1); 2082 break; 2083 case XGMAC_INT_DMA_CH_SR_TPS: 2084 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TXSE, 1); 2085 break; 2086 case XGMAC_INT_DMA_CH_SR_TBU: 2087 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TBUE, 1); 2088 break; 2089 case XGMAC_INT_DMA_CH_SR_RI: 2090 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RIE, 1); 2091 break; 2092 case XGMAC_INT_DMA_CH_SR_RBU: 2093 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RBUE, 1); 2094 break; 2095 case XGMAC_INT_DMA_CH_SR_RPS: 2096 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RSE, 1); 2097 break; 2098 case XGMAC_INT_DMA_CH_SR_TI_RI: 2099 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TIE, 1); 2100 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RIE, 1); 2101 break; 2102 case XGMAC_INT_DMA_CH_SR_FBE: 2103 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, FBEE, 1); 2104 break; 2105 case XGMAC_INT_DMA_ALL: 2106 channel->curr_ier |= channel->saved_ier; 2107 break; 2108 default: 2109 return -1; 2110 } 2111 2112 XGMAC_DMA_IOWRITE(channel, DMA_CH_IER, channel->curr_ier); 2113 2114 return 0; 2115 } 2116 2117 static int xgbe_disable_int(struct xgbe_channel *channel, 2118 enum xgbe_int int_id) 2119 { 2120 switch (int_id) { 2121 case XGMAC_INT_DMA_CH_SR_TI: 2122 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TIE, 0); 2123 break; 2124 case XGMAC_INT_DMA_CH_SR_TPS: 2125 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TXSE, 0); 2126 break; 2127 case XGMAC_INT_DMA_CH_SR_TBU: 2128 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TBUE, 0); 2129 break; 2130 case XGMAC_INT_DMA_CH_SR_RI: 2131 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RIE, 0); 2132 break; 2133 case XGMAC_INT_DMA_CH_SR_RBU: 2134 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RBUE, 0); 2135 break; 2136 case XGMAC_INT_DMA_CH_SR_RPS: 2137 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RSE, 0); 2138 break; 2139 case XGMAC_INT_DMA_CH_SR_TI_RI: 2140 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, TIE, 0); 2141 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, RIE, 0); 2142 break; 2143 case XGMAC_INT_DMA_CH_SR_FBE: 2144 XGMAC_SET_BITS(channel->curr_ier, DMA_CH_IER, FBEE, 0); 2145 break; 2146 case XGMAC_INT_DMA_ALL: 2147 channel->saved_ier = channel->curr_ier; 2148 channel->curr_ier = 0; 2149 break; 2150 default: 2151 return -1; 2152 } 2153 2154 XGMAC_DMA_IOWRITE(channel, DMA_CH_IER, channel->curr_ier); 2155 2156 return 0; 2157 } 2158 2159 static int __xgbe_exit(struct xgbe_prv_data *pdata) 2160 { 2161 unsigned int count = 2000; 2162 2163 DBGPR("-->xgbe_exit\n"); 2164 2165 /* Issue a software reset */ 2166 XGMAC_IOWRITE_BITS(pdata, DMA_MR, SWR, 1); 2167 usleep_range(10, 15); 2168 2169 /* Poll Until Poll Condition */ 2170 while (--count && XGMAC_IOREAD_BITS(pdata, DMA_MR, SWR)) 2171 usleep_range(500, 600); 2172 2173 if (!count) 2174 return -EBUSY; 2175 2176 DBGPR("<--xgbe_exit\n"); 2177 2178 return 0; 2179 } 2180 2181 static int xgbe_exit(struct xgbe_prv_data *pdata) 2182 { 2183 int ret; 2184 2185 /* To guard against possible incorrectly generated interrupts, 2186 * issue the software reset twice. 2187 */ 2188 ret = __xgbe_exit(pdata); 2189 if (ret) 2190 return ret; 2191 2192 return __xgbe_exit(pdata); 2193 } 2194 2195 static int xgbe_flush_tx_queues(struct xgbe_prv_data *pdata) 2196 { 2197 unsigned int i, count; 2198 2199 if (XGMAC_GET_BITS(pdata->hw_feat.version, MAC_VR, SNPSVER) < 0x21) 2200 return 0; 2201 2202 for (i = 0; i < pdata->tx_q_count; i++) 2203 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, FTQ, 1); 2204 2205 /* Poll Until Poll Condition */ 2206 for (i = 0; i < pdata->tx_q_count; i++) { 2207 count = 2000; 2208 while (--count && XGMAC_MTL_IOREAD_BITS(pdata, i, 2209 MTL_Q_TQOMR, FTQ)) 2210 usleep_range(500, 600); 2211 2212 if (!count) 2213 return -EBUSY; 2214 } 2215 2216 return 0; 2217 } 2218 2219 static void xgbe_config_dma_bus(struct xgbe_prv_data *pdata) 2220 { 2221 unsigned int sbmr; 2222 2223 sbmr = XGMAC_IOREAD(pdata, DMA_SBMR); 2224 2225 /* Set enhanced addressing mode */ 2226 XGMAC_SET_BITS(sbmr, DMA_SBMR, EAME, 1); 2227 2228 /* Set the System Bus mode */ 2229 XGMAC_SET_BITS(sbmr, DMA_SBMR, UNDEF, 1); 2230 XGMAC_SET_BITS(sbmr, DMA_SBMR, BLEN, pdata->blen >> 2); 2231 XGMAC_SET_BITS(sbmr, DMA_SBMR, AAL, pdata->aal); 2232 XGMAC_SET_BITS(sbmr, DMA_SBMR, RD_OSR_LMT, pdata->rd_osr_limit - 1); 2233 XGMAC_SET_BITS(sbmr, DMA_SBMR, WR_OSR_LMT, pdata->wr_osr_limit - 1); 2234 2235 XGMAC_IOWRITE(pdata, DMA_SBMR, sbmr); 2236 2237 /* Set descriptor fetching threshold */ 2238 if (pdata->vdata->tx_desc_prefetch) 2239 XGMAC_IOWRITE_BITS(pdata, DMA_TXEDMACR, TDPS, 2240 pdata->vdata->tx_desc_prefetch); 2241 2242 if (pdata->vdata->rx_desc_prefetch) 2243 XGMAC_IOWRITE_BITS(pdata, DMA_RXEDMACR, RDPS, 2244 pdata->vdata->rx_desc_prefetch); 2245 } 2246 2247 static void xgbe_config_dma_cache(struct xgbe_prv_data *pdata) 2248 { 2249 XGMAC_IOWRITE(pdata, DMA_AXIARCR, pdata->arcr); 2250 XGMAC_IOWRITE(pdata, DMA_AXIAWCR, pdata->awcr); 2251 if (pdata->awarcr) 2252 XGMAC_IOWRITE(pdata, DMA_AXIAWARCR, pdata->awarcr); 2253 } 2254 2255 static void xgbe_config_mtl_mode(struct xgbe_prv_data *pdata) 2256 { 2257 unsigned int i; 2258 2259 /* Set Tx to weighted round robin scheduling algorithm */ 2260 XGMAC_IOWRITE_BITS(pdata, MTL_OMR, ETSALG, MTL_ETSALG_WRR); 2261 2262 /* Set Tx traffic classes to use WRR algorithm with equal weights */ 2263 for (i = 0; i < pdata->hw_feat.tc_cnt; i++) { 2264 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA, 2265 MTL_TSA_ETS); 2266 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_QWR, QW, 1); 2267 } 2268 2269 /* Set Rx to strict priority algorithm */ 2270 XGMAC_IOWRITE_BITS(pdata, MTL_OMR, RAA, MTL_RAA_SP); 2271 } 2272 2273 static void xgbe_queue_flow_control_threshold(struct xgbe_prv_data *pdata, 2274 unsigned int queue, 2275 unsigned int q_fifo_size) 2276 { 2277 unsigned int frame_fifo_size; 2278 unsigned int rfa, rfd; 2279 2280 frame_fifo_size = XGMAC_FLOW_CONTROL_ALIGN(xgbe_get_max_frame(pdata)); 2281 2282 if (pdata->pfcq[queue] && (q_fifo_size > pdata->pfc_rfa)) { 2283 /* PFC is active for this queue */ 2284 rfa = pdata->pfc_rfa; 2285 rfd = rfa + frame_fifo_size; 2286 if (rfd > XGMAC_FLOW_CONTROL_MAX) 2287 rfd = XGMAC_FLOW_CONTROL_MAX; 2288 if (rfa >= XGMAC_FLOW_CONTROL_MAX) 2289 rfa = XGMAC_FLOW_CONTROL_MAX - XGMAC_FLOW_CONTROL_UNIT; 2290 } else { 2291 /* This path deals with just maximum frame sizes which are 2292 * limited to a jumbo frame of 9,000 (plus headers, etc.) 2293 * so we can never exceed the maximum allowable RFA/RFD 2294 * values. 2295 */ 2296 if (q_fifo_size <= 2048) { 2297 /* rx_rfd to zero to signal no flow control */ 2298 pdata->rx_rfa[queue] = 0; 2299 pdata->rx_rfd[queue] = 0; 2300 return; 2301 } 2302 2303 if (q_fifo_size <= 4096) { 2304 /* Between 2048 and 4096 */ 2305 pdata->rx_rfa[queue] = 0; /* Full - 1024 bytes */ 2306 pdata->rx_rfd[queue] = 1; /* Full - 1536 bytes */ 2307 return; 2308 } 2309 2310 if (q_fifo_size <= frame_fifo_size) { 2311 /* Between 4096 and max-frame */ 2312 pdata->rx_rfa[queue] = 2; /* Full - 2048 bytes */ 2313 pdata->rx_rfd[queue] = 5; /* Full - 3584 bytes */ 2314 return; 2315 } 2316 2317 if (q_fifo_size <= (frame_fifo_size * 3)) { 2318 /* Between max-frame and 3 max-frames, 2319 * trigger if we get just over a frame of data and 2320 * resume when we have just under half a frame left. 2321 */ 2322 rfa = q_fifo_size - frame_fifo_size; 2323 rfd = rfa + (frame_fifo_size / 2); 2324 } else { 2325 /* Above 3 max-frames - trigger when just over 2326 * 2 frames of space available 2327 */ 2328 rfa = frame_fifo_size * 2; 2329 rfa += XGMAC_FLOW_CONTROL_UNIT; 2330 rfd = rfa + frame_fifo_size; 2331 } 2332 } 2333 2334 pdata->rx_rfa[queue] = XGMAC_FLOW_CONTROL_VALUE(rfa); 2335 pdata->rx_rfd[queue] = XGMAC_FLOW_CONTROL_VALUE(rfd); 2336 } 2337 2338 static void xgbe_calculate_flow_control_threshold(struct xgbe_prv_data *pdata, 2339 unsigned int *fifo) 2340 { 2341 unsigned int q_fifo_size; 2342 unsigned int i; 2343 2344 for (i = 0; i < pdata->rx_q_count; i++) { 2345 q_fifo_size = (fifo[i] + 1) * XGMAC_FIFO_UNIT; 2346 2347 xgbe_queue_flow_control_threshold(pdata, i, q_fifo_size); 2348 } 2349 } 2350 2351 static void xgbe_config_flow_control_threshold(struct xgbe_prv_data *pdata) 2352 { 2353 unsigned int i; 2354 2355 for (i = 0; i < pdata->rx_q_count; i++) { 2356 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQFCR, RFA, 2357 pdata->rx_rfa[i]); 2358 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQFCR, RFD, 2359 pdata->rx_rfd[i]); 2360 } 2361 } 2362 2363 static unsigned int xgbe_get_tx_fifo_size(struct xgbe_prv_data *pdata) 2364 { 2365 /* The configured value may not be the actual amount of fifo RAM */ 2366 return min_t(unsigned int, pdata->tx_max_fifo_size, 2367 pdata->hw_feat.tx_fifo_size); 2368 } 2369 2370 static unsigned int xgbe_get_rx_fifo_size(struct xgbe_prv_data *pdata) 2371 { 2372 /* The configured value may not be the actual amount of fifo RAM */ 2373 return min_t(unsigned int, pdata->rx_max_fifo_size, 2374 pdata->hw_feat.rx_fifo_size); 2375 } 2376 2377 static void xgbe_calculate_equal_fifo(unsigned int fifo_size, 2378 unsigned int queue_count, 2379 unsigned int *fifo) 2380 { 2381 unsigned int q_fifo_size; 2382 unsigned int p_fifo; 2383 unsigned int i; 2384 2385 q_fifo_size = fifo_size / queue_count; 2386 2387 /* Calculate the fifo setting by dividing the queue's fifo size 2388 * by the fifo allocation increment (with 0 representing the 2389 * base allocation increment so decrement the result by 1). 2390 */ 2391 p_fifo = q_fifo_size / XGMAC_FIFO_UNIT; 2392 if (p_fifo) 2393 p_fifo--; 2394 2395 /* Distribute the fifo equally amongst the queues */ 2396 for (i = 0; i < queue_count; i++) 2397 fifo[i] = p_fifo; 2398 } 2399 2400 static unsigned int xgbe_set_nonprio_fifos(unsigned int fifo_size, 2401 unsigned int queue_count, 2402 unsigned int *fifo) 2403 { 2404 unsigned int i; 2405 2406 BUILD_BUG_ON_NOT_POWER_OF_2(XGMAC_FIFO_MIN_ALLOC); 2407 2408 if (queue_count <= IEEE_8021QAZ_MAX_TCS) 2409 return fifo_size; 2410 2411 /* Rx queues 9 and up are for specialized packets, 2412 * such as PTP or DCB control packets, etc. and 2413 * don't require a large fifo 2414 */ 2415 for (i = IEEE_8021QAZ_MAX_TCS; i < queue_count; i++) { 2416 fifo[i] = (XGMAC_FIFO_MIN_ALLOC / XGMAC_FIFO_UNIT) - 1; 2417 fifo_size -= XGMAC_FIFO_MIN_ALLOC; 2418 } 2419 2420 return fifo_size; 2421 } 2422 2423 static unsigned int xgbe_get_pfc_delay(struct xgbe_prv_data *pdata) 2424 { 2425 unsigned int delay; 2426 2427 /* If a delay has been provided, use that */ 2428 if (pdata->pfc->delay) 2429 return pdata->pfc->delay / 8; 2430 2431 /* Allow for two maximum size frames */ 2432 delay = xgbe_get_max_frame(pdata); 2433 delay += XGMAC_ETH_PREAMBLE; 2434 delay *= 2; 2435 2436 /* Allow for PFC frame */ 2437 delay += XGMAC_PFC_DATA_LEN; 2438 delay += ETH_HLEN + ETH_FCS_LEN; 2439 delay += XGMAC_ETH_PREAMBLE; 2440 2441 /* Allow for miscellaneous delays (LPI exit, cable, etc.) */ 2442 delay += XGMAC_PFC_DELAYS; 2443 2444 return delay; 2445 } 2446 2447 static unsigned int xgbe_get_pfc_queues(struct xgbe_prv_data *pdata) 2448 { 2449 unsigned int count, prio_queues; 2450 unsigned int i; 2451 2452 if (!pdata->pfc->pfc_en) 2453 return 0; 2454 2455 count = 0; 2456 prio_queues = XGMAC_PRIO_QUEUES(pdata->rx_q_count); 2457 for (i = 0; i < prio_queues; i++) { 2458 if (!xgbe_is_pfc_queue(pdata, i)) 2459 continue; 2460 2461 pdata->pfcq[i] = 1; 2462 count++; 2463 } 2464 2465 return count; 2466 } 2467 2468 static void xgbe_calculate_dcb_fifo(struct xgbe_prv_data *pdata, 2469 unsigned int fifo_size, 2470 unsigned int *fifo) 2471 { 2472 unsigned int q_fifo_size, rem_fifo, addn_fifo; 2473 unsigned int prio_queues; 2474 unsigned int pfc_count; 2475 unsigned int i; 2476 2477 q_fifo_size = XGMAC_FIFO_ALIGN(xgbe_get_max_frame(pdata)); 2478 prio_queues = XGMAC_PRIO_QUEUES(pdata->rx_q_count); 2479 pfc_count = xgbe_get_pfc_queues(pdata); 2480 2481 if (!pfc_count || ((q_fifo_size * prio_queues) > fifo_size)) { 2482 /* No traffic classes with PFC enabled or can't do lossless */ 2483 xgbe_calculate_equal_fifo(fifo_size, prio_queues, fifo); 2484 return; 2485 } 2486 2487 /* Calculate how much fifo we have to play with */ 2488 rem_fifo = fifo_size - (q_fifo_size * prio_queues); 2489 2490 /* Calculate how much more than base fifo PFC needs, which also 2491 * becomes the threshold activation point (RFA) 2492 */ 2493 pdata->pfc_rfa = xgbe_get_pfc_delay(pdata); 2494 pdata->pfc_rfa = XGMAC_FLOW_CONTROL_ALIGN(pdata->pfc_rfa); 2495 2496 if (pdata->pfc_rfa > q_fifo_size) { 2497 addn_fifo = pdata->pfc_rfa - q_fifo_size; 2498 addn_fifo = XGMAC_FIFO_ALIGN(addn_fifo); 2499 } else { 2500 addn_fifo = 0; 2501 } 2502 2503 /* Calculate DCB fifo settings: 2504 * - distribute remaining fifo between the VLAN priority 2505 * queues based on traffic class PFC enablement and overall 2506 * priority (0 is lowest priority, so start at highest) 2507 */ 2508 i = prio_queues; 2509 while (i > 0) { 2510 i--; 2511 2512 fifo[i] = (q_fifo_size / XGMAC_FIFO_UNIT) - 1; 2513 2514 if (!pdata->pfcq[i] || !addn_fifo) 2515 continue; 2516 2517 if (addn_fifo > rem_fifo) { 2518 netdev_warn(pdata->netdev, 2519 "RXq%u cannot set needed fifo size\n", i); 2520 if (!rem_fifo) 2521 continue; 2522 2523 addn_fifo = rem_fifo; 2524 } 2525 2526 fifo[i] += (addn_fifo / XGMAC_FIFO_UNIT); 2527 rem_fifo -= addn_fifo; 2528 } 2529 2530 if (rem_fifo) { 2531 unsigned int inc_fifo = rem_fifo / prio_queues; 2532 2533 /* Distribute remaining fifo across queues */ 2534 for (i = 0; i < prio_queues; i++) 2535 fifo[i] += (inc_fifo / XGMAC_FIFO_UNIT); 2536 } 2537 } 2538 2539 static void xgbe_config_tx_fifo_size(struct xgbe_prv_data *pdata) 2540 { 2541 unsigned int fifo_size; 2542 unsigned int fifo[XGBE_MAX_QUEUES]; 2543 unsigned int i; 2544 2545 fifo_size = xgbe_get_tx_fifo_size(pdata); 2546 2547 xgbe_calculate_equal_fifo(fifo_size, pdata->tx_q_count, fifo); 2548 2549 for (i = 0; i < pdata->tx_q_count; i++) 2550 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TQS, fifo[i]); 2551 2552 netif_info(pdata, drv, pdata->netdev, 2553 "%d Tx hardware queues, %d byte fifo per queue\n", 2554 pdata->tx_q_count, ((fifo[0] + 1) * XGMAC_FIFO_UNIT)); 2555 } 2556 2557 static void xgbe_config_rx_fifo_size(struct xgbe_prv_data *pdata) 2558 { 2559 unsigned int fifo_size; 2560 unsigned int fifo[XGBE_MAX_QUEUES]; 2561 unsigned int prio_queues; 2562 unsigned int i; 2563 2564 /* Clear any DCB related fifo/queue information */ 2565 memset(pdata->pfcq, 0, sizeof(pdata->pfcq)); 2566 pdata->pfc_rfa = 0; 2567 2568 fifo_size = xgbe_get_rx_fifo_size(pdata); 2569 prio_queues = XGMAC_PRIO_QUEUES(pdata->rx_q_count); 2570 2571 /* Assign a minimum fifo to the non-VLAN priority queues */ 2572 fifo_size = xgbe_set_nonprio_fifos(fifo_size, pdata->rx_q_count, fifo); 2573 2574 if (pdata->pfc && pdata->ets) 2575 xgbe_calculate_dcb_fifo(pdata, fifo_size, fifo); 2576 else 2577 xgbe_calculate_equal_fifo(fifo_size, prio_queues, fifo); 2578 2579 for (i = 0; i < pdata->rx_q_count; i++) 2580 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_RQOMR, RQS, fifo[i]); 2581 2582 xgbe_calculate_flow_control_threshold(pdata, fifo); 2583 xgbe_config_flow_control_threshold(pdata); 2584 2585 if (pdata->pfc && pdata->ets && pdata->pfc->pfc_en) { 2586 netif_info(pdata, drv, pdata->netdev, 2587 "%u Rx hardware queues\n", pdata->rx_q_count); 2588 for (i = 0; i < pdata->rx_q_count; i++) 2589 netif_info(pdata, drv, pdata->netdev, 2590 "RxQ%u, %u byte fifo queue\n", i, 2591 ((fifo[i] + 1) * XGMAC_FIFO_UNIT)); 2592 } else { 2593 netif_info(pdata, drv, pdata->netdev, 2594 "%u Rx hardware queues, %u byte fifo per queue\n", 2595 pdata->rx_q_count, 2596 ((fifo[0] + 1) * XGMAC_FIFO_UNIT)); 2597 } 2598 } 2599 2600 static void xgbe_config_queue_mapping(struct xgbe_prv_data *pdata) 2601 { 2602 unsigned int qptc, qptc_extra, queue; 2603 unsigned int prio_queues; 2604 unsigned int ppq, ppq_extra, prio; 2605 unsigned int mask; 2606 unsigned int i, j, reg, reg_val; 2607 2608 /* Map the MTL Tx Queues to Traffic Classes 2609 * Note: Tx Queues >= Traffic Classes 2610 */ 2611 qptc = pdata->tx_q_count / pdata->hw_feat.tc_cnt; 2612 qptc_extra = pdata->tx_q_count % pdata->hw_feat.tc_cnt; 2613 2614 for (i = 0, queue = 0; i < pdata->hw_feat.tc_cnt; i++) { 2615 for (j = 0; j < qptc; j++) { 2616 netif_dbg(pdata, drv, pdata->netdev, 2617 "TXq%u mapped to TC%u\n", queue, i); 2618 XGMAC_MTL_IOWRITE_BITS(pdata, queue, MTL_Q_TQOMR, 2619 Q2TCMAP, i); 2620 pdata->q2tc_map[queue++] = i; 2621 } 2622 2623 if (i < qptc_extra) { 2624 netif_dbg(pdata, drv, pdata->netdev, 2625 "TXq%u mapped to TC%u\n", queue, i); 2626 XGMAC_MTL_IOWRITE_BITS(pdata, queue, MTL_Q_TQOMR, 2627 Q2TCMAP, i); 2628 pdata->q2tc_map[queue++] = i; 2629 } 2630 } 2631 2632 /* Map the 8 VLAN priority values to available MTL Rx queues */ 2633 prio_queues = XGMAC_PRIO_QUEUES(pdata->rx_q_count); 2634 ppq = IEEE_8021QAZ_MAX_TCS / prio_queues; 2635 ppq_extra = IEEE_8021QAZ_MAX_TCS % prio_queues; 2636 2637 reg = MAC_RQC2R; 2638 reg_val = 0; 2639 for (i = 0, prio = 0; i < prio_queues;) { 2640 mask = 0; 2641 for (j = 0; j < ppq; j++) { 2642 netif_dbg(pdata, drv, pdata->netdev, 2643 "PRIO%u mapped to RXq%u\n", prio, i); 2644 mask |= (1 << prio); 2645 pdata->prio2q_map[prio++] = i; 2646 } 2647 2648 if (i < ppq_extra) { 2649 netif_dbg(pdata, drv, pdata->netdev, 2650 "PRIO%u mapped to RXq%u\n", prio, i); 2651 mask |= (1 << prio); 2652 pdata->prio2q_map[prio++] = i; 2653 } 2654 2655 reg_val |= (mask << ((i++ % MAC_RQC2_Q_PER_REG) << 3)); 2656 2657 if ((i % MAC_RQC2_Q_PER_REG) && (i != prio_queues)) 2658 continue; 2659 2660 XGMAC_IOWRITE(pdata, reg, reg_val); 2661 reg += MAC_RQC2_INC; 2662 reg_val = 0; 2663 } 2664 2665 /* Select dynamic mapping of MTL Rx queue to DMA Rx channel */ 2666 reg = MTL_RQDCM0R; 2667 reg_val = 0; 2668 for (i = 0; i < pdata->rx_q_count;) { 2669 reg_val |= (0x80 << ((i++ % MTL_RQDCM_Q_PER_REG) << 3)); 2670 2671 if ((i % MTL_RQDCM_Q_PER_REG) && (i != pdata->rx_q_count)) 2672 continue; 2673 2674 XGMAC_IOWRITE(pdata, reg, reg_val); 2675 2676 reg += MTL_RQDCM_INC; 2677 reg_val = 0; 2678 } 2679 } 2680 2681 static void xgbe_config_tc(struct xgbe_prv_data *pdata) 2682 { 2683 unsigned int offset, queue, prio; 2684 u8 i; 2685 2686 netdev_reset_tc(pdata->netdev); 2687 if (!pdata->num_tcs) 2688 return; 2689 2690 netdev_set_num_tc(pdata->netdev, pdata->num_tcs); 2691 2692 for (i = 0, queue = 0, offset = 0; i < pdata->num_tcs; i++) { 2693 while ((queue < pdata->tx_q_count) && 2694 (pdata->q2tc_map[queue] == i)) 2695 queue++; 2696 2697 netif_dbg(pdata, drv, pdata->netdev, "TC%u using TXq%u-%u\n", 2698 i, offset, queue - 1); 2699 netdev_set_tc_queue(pdata->netdev, i, queue - offset, offset); 2700 offset = queue; 2701 } 2702 2703 if (!pdata->ets) 2704 return; 2705 2706 for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) 2707 netdev_set_prio_tc_map(pdata->netdev, prio, 2708 pdata->ets->prio_tc[prio]); 2709 } 2710 2711 static void xgbe_config_dcb_tc(struct xgbe_prv_data *pdata) 2712 { 2713 struct ieee_ets *ets = pdata->ets; 2714 unsigned int total_weight, min_weight, weight; 2715 unsigned int mask, reg, reg_val; 2716 unsigned int i, prio; 2717 2718 if (!ets) 2719 return; 2720 2721 /* Set Tx to deficit weighted round robin scheduling algorithm (when 2722 * traffic class is using ETS algorithm) 2723 */ 2724 XGMAC_IOWRITE_BITS(pdata, MTL_OMR, ETSALG, MTL_ETSALG_DWRR); 2725 2726 /* Set Traffic Class algorithms */ 2727 total_weight = pdata->netdev->mtu * pdata->hw_feat.tc_cnt; 2728 min_weight = total_weight / 100; 2729 if (!min_weight) 2730 min_weight = 1; 2731 2732 for (i = 0; i < pdata->hw_feat.tc_cnt; i++) { 2733 /* Map the priorities to the traffic class */ 2734 mask = 0; 2735 for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; prio++) { 2736 if (ets->prio_tc[prio] == i) 2737 mask |= (1 << prio); 2738 } 2739 mask &= 0xff; 2740 2741 netif_dbg(pdata, drv, pdata->netdev, "TC%u PRIO mask=%#x\n", 2742 i, mask); 2743 reg = MTL_TCPM0R + (MTL_TCPM_INC * (i / MTL_TCPM_TC_PER_REG)); 2744 reg_val = XGMAC_IOREAD(pdata, reg); 2745 2746 reg_val &= ~(0xff << ((i % MTL_TCPM_TC_PER_REG) << 3)); 2747 reg_val |= (mask << ((i % MTL_TCPM_TC_PER_REG) << 3)); 2748 2749 XGMAC_IOWRITE(pdata, reg, reg_val); 2750 2751 /* Set the traffic class algorithm */ 2752 switch (ets->tc_tsa[i]) { 2753 case IEEE_8021QAZ_TSA_STRICT: 2754 netif_dbg(pdata, drv, pdata->netdev, 2755 "TC%u using SP\n", i); 2756 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA, 2757 MTL_TSA_SP); 2758 break; 2759 case IEEE_8021QAZ_TSA_ETS: 2760 weight = total_weight * ets->tc_tx_bw[i] / 100; 2761 weight = clamp(weight, min_weight, total_weight); 2762 2763 netif_dbg(pdata, drv, pdata->netdev, 2764 "TC%u using DWRR (weight %u)\n", i, weight); 2765 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_ETSCR, TSA, 2766 MTL_TSA_ETS); 2767 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_TC_QWR, QW, 2768 weight); 2769 break; 2770 } 2771 } 2772 2773 xgbe_config_tc(pdata); 2774 } 2775 2776 static void xgbe_config_dcb_pfc(struct xgbe_prv_data *pdata) 2777 { 2778 if (!test_bit(XGBE_DOWN, &pdata->dev_state)) { 2779 /* Just stop the Tx queues while Rx fifo is changed */ 2780 netif_tx_stop_all_queues(pdata->netdev); 2781 2782 /* Suspend Rx so that fifo's can be adjusted */ 2783 pdata->hw_if.disable_rx(pdata); 2784 } 2785 2786 xgbe_config_rx_fifo_size(pdata); 2787 xgbe_config_flow_control(pdata); 2788 2789 if (!test_bit(XGBE_DOWN, &pdata->dev_state)) { 2790 /* Resume Rx */ 2791 pdata->hw_if.enable_rx(pdata); 2792 2793 /* Resume Tx queues */ 2794 netif_tx_start_all_queues(pdata->netdev); 2795 } 2796 } 2797 2798 static void xgbe_config_mac_address(struct xgbe_prv_data *pdata) 2799 { 2800 xgbe_set_mac_address(pdata, pdata->netdev->dev_addr); 2801 2802 /* Filtering is done using perfect filtering and hash filtering */ 2803 if (pdata->hw_feat.hash_table_size) { 2804 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, HPF, 1); 2805 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, HUC, 1); 2806 XGMAC_IOWRITE_BITS(pdata, MAC_PFR, HMC, 1); 2807 } 2808 } 2809 2810 static void xgbe_config_jumbo_enable(struct xgbe_prv_data *pdata) 2811 { 2812 unsigned int val; 2813 2814 val = (pdata->netdev->mtu > XGMAC_STD_PACKET_MTU) ? 1 : 0; 2815 2816 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val); 2817 } 2818 2819 static void xgbe_config_mac_speed(struct xgbe_prv_data *pdata) 2820 { 2821 xgbe_set_speed(pdata, pdata->phy_speed); 2822 } 2823 2824 static void xgbe_config_checksum_offload(struct xgbe_prv_data *pdata) 2825 { 2826 if (pdata->netdev->features & NETIF_F_RXCSUM) 2827 xgbe_enable_rx_csum(pdata); 2828 else 2829 xgbe_disable_rx_csum(pdata); 2830 } 2831 2832 static void xgbe_config_vlan_support(struct xgbe_prv_data *pdata) 2833 { 2834 /* Indicate that VLAN Tx CTAGs come from context descriptors */ 2835 XGMAC_IOWRITE_BITS(pdata, MAC_VLANIR, CSVL, 0); 2836 XGMAC_IOWRITE_BITS(pdata, MAC_VLANIR, VLTI, 1); 2837 2838 /* Set the current VLAN Hash Table register value */ 2839 xgbe_update_vlan_hash_table(pdata); 2840 2841 if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 2842 xgbe_enable_rx_vlan_filtering(pdata); 2843 else 2844 xgbe_disable_rx_vlan_filtering(pdata); 2845 2846 if (pdata->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) 2847 xgbe_enable_rx_vlan_stripping(pdata); 2848 else 2849 xgbe_disable_rx_vlan_stripping(pdata); 2850 } 2851 2852 static u64 xgbe_mmc_read(struct xgbe_prv_data *pdata, unsigned int reg_lo) 2853 { 2854 bool read_hi; 2855 u64 val; 2856 2857 if (pdata->vdata->mmc_64bit) { 2858 switch (reg_lo) { 2859 /* These registers are always 32 bit */ 2860 case MMC_RXRUNTERROR: 2861 case MMC_RXJABBERERROR: 2862 case MMC_RXUNDERSIZE_G: 2863 case MMC_RXOVERSIZE_G: 2864 case MMC_RXWATCHDOGERROR: 2865 read_hi = false; 2866 break; 2867 2868 default: 2869 read_hi = true; 2870 } 2871 } else { 2872 switch (reg_lo) { 2873 /* These registers are always 64 bit */ 2874 case MMC_TXOCTETCOUNT_GB_LO: 2875 case MMC_TXOCTETCOUNT_G_LO: 2876 case MMC_RXOCTETCOUNT_GB_LO: 2877 case MMC_RXOCTETCOUNT_G_LO: 2878 read_hi = true; 2879 break; 2880 2881 default: 2882 read_hi = false; 2883 } 2884 } 2885 2886 val = XGMAC_IOREAD(pdata, reg_lo); 2887 2888 if (read_hi) 2889 val |= ((u64)XGMAC_IOREAD(pdata, reg_lo + 4) << 32); 2890 2891 return val; 2892 } 2893 2894 static void xgbe_tx_mmc_int(struct xgbe_prv_data *pdata) 2895 { 2896 struct xgbe_mmc_stats *stats = &pdata->mmc_stats; 2897 unsigned int mmc_isr = XGMAC_IOREAD(pdata, MMC_TISR); 2898 2899 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXOCTETCOUNT_GB)) 2900 stats->txoctetcount_gb += 2901 xgbe_mmc_read(pdata, MMC_TXOCTETCOUNT_GB_LO); 2902 2903 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXFRAMECOUNT_GB)) 2904 stats->txframecount_gb += 2905 xgbe_mmc_read(pdata, MMC_TXFRAMECOUNT_GB_LO); 2906 2907 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXBROADCASTFRAMES_G)) 2908 stats->txbroadcastframes_g += 2909 xgbe_mmc_read(pdata, MMC_TXBROADCASTFRAMES_G_LO); 2910 2911 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXMULTICASTFRAMES_G)) 2912 stats->txmulticastframes_g += 2913 xgbe_mmc_read(pdata, MMC_TXMULTICASTFRAMES_G_LO); 2914 2915 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX64OCTETS_GB)) 2916 stats->tx64octets_gb += 2917 xgbe_mmc_read(pdata, MMC_TX64OCTETS_GB_LO); 2918 2919 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX65TO127OCTETS_GB)) 2920 stats->tx65to127octets_gb += 2921 xgbe_mmc_read(pdata, MMC_TX65TO127OCTETS_GB_LO); 2922 2923 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX128TO255OCTETS_GB)) 2924 stats->tx128to255octets_gb += 2925 xgbe_mmc_read(pdata, MMC_TX128TO255OCTETS_GB_LO); 2926 2927 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX256TO511OCTETS_GB)) 2928 stats->tx256to511octets_gb += 2929 xgbe_mmc_read(pdata, MMC_TX256TO511OCTETS_GB_LO); 2930 2931 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX512TO1023OCTETS_GB)) 2932 stats->tx512to1023octets_gb += 2933 xgbe_mmc_read(pdata, MMC_TX512TO1023OCTETS_GB_LO); 2934 2935 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TX1024TOMAXOCTETS_GB)) 2936 stats->tx1024tomaxoctets_gb += 2937 xgbe_mmc_read(pdata, MMC_TX1024TOMAXOCTETS_GB_LO); 2938 2939 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXUNICASTFRAMES_GB)) 2940 stats->txunicastframes_gb += 2941 xgbe_mmc_read(pdata, MMC_TXUNICASTFRAMES_GB_LO); 2942 2943 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXMULTICASTFRAMES_GB)) 2944 stats->txmulticastframes_gb += 2945 xgbe_mmc_read(pdata, MMC_TXMULTICASTFRAMES_GB_LO); 2946 2947 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXBROADCASTFRAMES_GB)) 2948 stats->txbroadcastframes_g += 2949 xgbe_mmc_read(pdata, MMC_TXBROADCASTFRAMES_GB_LO); 2950 2951 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXUNDERFLOWERROR)) 2952 stats->txunderflowerror += 2953 xgbe_mmc_read(pdata, MMC_TXUNDERFLOWERROR_LO); 2954 2955 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXOCTETCOUNT_G)) 2956 stats->txoctetcount_g += 2957 xgbe_mmc_read(pdata, MMC_TXOCTETCOUNT_G_LO); 2958 2959 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXFRAMECOUNT_G)) 2960 stats->txframecount_g += 2961 xgbe_mmc_read(pdata, MMC_TXFRAMECOUNT_G_LO); 2962 2963 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXPAUSEFRAMES)) 2964 stats->txpauseframes += 2965 xgbe_mmc_read(pdata, MMC_TXPAUSEFRAMES_LO); 2966 2967 if (XGMAC_GET_BITS(mmc_isr, MMC_TISR, TXVLANFRAMES_G)) 2968 stats->txvlanframes_g += 2969 xgbe_mmc_read(pdata, MMC_TXVLANFRAMES_G_LO); 2970 } 2971 2972 static void xgbe_rx_mmc_int(struct xgbe_prv_data *pdata) 2973 { 2974 struct xgbe_mmc_stats *stats = &pdata->mmc_stats; 2975 unsigned int mmc_isr = XGMAC_IOREAD(pdata, MMC_RISR); 2976 2977 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXFRAMECOUNT_GB)) 2978 stats->rxframecount_gb += 2979 xgbe_mmc_read(pdata, MMC_RXFRAMECOUNT_GB_LO); 2980 2981 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXOCTETCOUNT_GB)) 2982 stats->rxoctetcount_gb += 2983 xgbe_mmc_read(pdata, MMC_RXOCTETCOUNT_GB_LO); 2984 2985 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXOCTETCOUNT_G)) 2986 stats->rxoctetcount_g += 2987 xgbe_mmc_read(pdata, MMC_RXOCTETCOUNT_G_LO); 2988 2989 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXBROADCASTFRAMES_G)) 2990 stats->rxbroadcastframes_g += 2991 xgbe_mmc_read(pdata, MMC_RXBROADCASTFRAMES_G_LO); 2992 2993 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXMULTICASTFRAMES_G)) 2994 stats->rxmulticastframes_g += 2995 xgbe_mmc_read(pdata, MMC_RXMULTICASTFRAMES_G_LO); 2996 2997 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXCRCERROR)) 2998 stats->rxcrcerror += 2999 xgbe_mmc_read(pdata, MMC_RXCRCERROR_LO); 3000 3001 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXRUNTERROR)) 3002 stats->rxrunterror += 3003 xgbe_mmc_read(pdata, MMC_RXRUNTERROR); 3004 3005 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXJABBERERROR)) 3006 stats->rxjabbererror += 3007 xgbe_mmc_read(pdata, MMC_RXJABBERERROR); 3008 3009 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXUNDERSIZE_G)) 3010 stats->rxundersize_g += 3011 xgbe_mmc_read(pdata, MMC_RXUNDERSIZE_G); 3012 3013 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXOVERSIZE_G)) 3014 stats->rxoversize_g += 3015 xgbe_mmc_read(pdata, MMC_RXOVERSIZE_G); 3016 3017 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX64OCTETS_GB)) 3018 stats->rx64octets_gb += 3019 xgbe_mmc_read(pdata, MMC_RX64OCTETS_GB_LO); 3020 3021 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX65TO127OCTETS_GB)) 3022 stats->rx65to127octets_gb += 3023 xgbe_mmc_read(pdata, MMC_RX65TO127OCTETS_GB_LO); 3024 3025 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX128TO255OCTETS_GB)) 3026 stats->rx128to255octets_gb += 3027 xgbe_mmc_read(pdata, MMC_RX128TO255OCTETS_GB_LO); 3028 3029 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX256TO511OCTETS_GB)) 3030 stats->rx256to511octets_gb += 3031 xgbe_mmc_read(pdata, MMC_RX256TO511OCTETS_GB_LO); 3032 3033 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX512TO1023OCTETS_GB)) 3034 stats->rx512to1023octets_gb += 3035 xgbe_mmc_read(pdata, MMC_RX512TO1023OCTETS_GB_LO); 3036 3037 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RX1024TOMAXOCTETS_GB)) 3038 stats->rx1024tomaxoctets_gb += 3039 xgbe_mmc_read(pdata, MMC_RX1024TOMAXOCTETS_GB_LO); 3040 3041 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXUNICASTFRAMES_G)) 3042 stats->rxunicastframes_g += 3043 xgbe_mmc_read(pdata, MMC_RXUNICASTFRAMES_G_LO); 3044 3045 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXLENGTHERROR)) 3046 stats->rxlengtherror += 3047 xgbe_mmc_read(pdata, MMC_RXLENGTHERROR_LO); 3048 3049 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXOUTOFRANGETYPE)) 3050 stats->rxoutofrangetype += 3051 xgbe_mmc_read(pdata, MMC_RXOUTOFRANGETYPE_LO); 3052 3053 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXPAUSEFRAMES)) 3054 stats->rxpauseframes += 3055 xgbe_mmc_read(pdata, MMC_RXPAUSEFRAMES_LO); 3056 3057 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXFIFOOVERFLOW)) 3058 stats->rxfifooverflow += 3059 xgbe_mmc_read(pdata, MMC_RXFIFOOVERFLOW_LO); 3060 3061 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXVLANFRAMES_GB)) 3062 stats->rxvlanframes_gb += 3063 xgbe_mmc_read(pdata, MMC_RXVLANFRAMES_GB_LO); 3064 3065 if (XGMAC_GET_BITS(mmc_isr, MMC_RISR, RXWATCHDOGERROR)) 3066 stats->rxwatchdogerror += 3067 xgbe_mmc_read(pdata, MMC_RXWATCHDOGERROR); 3068 } 3069 3070 static void xgbe_read_mmc_stats(struct xgbe_prv_data *pdata) 3071 { 3072 struct xgbe_mmc_stats *stats = &pdata->mmc_stats; 3073 3074 /* Freeze counters */ 3075 XGMAC_IOWRITE_BITS(pdata, MMC_CR, MCF, 1); 3076 3077 stats->txoctetcount_gb += 3078 xgbe_mmc_read(pdata, MMC_TXOCTETCOUNT_GB_LO); 3079 3080 stats->txframecount_gb += 3081 xgbe_mmc_read(pdata, MMC_TXFRAMECOUNT_GB_LO); 3082 3083 stats->txbroadcastframes_g += 3084 xgbe_mmc_read(pdata, MMC_TXBROADCASTFRAMES_G_LO); 3085 3086 stats->txmulticastframes_g += 3087 xgbe_mmc_read(pdata, MMC_TXMULTICASTFRAMES_G_LO); 3088 3089 stats->tx64octets_gb += 3090 xgbe_mmc_read(pdata, MMC_TX64OCTETS_GB_LO); 3091 3092 stats->tx65to127octets_gb += 3093 xgbe_mmc_read(pdata, MMC_TX65TO127OCTETS_GB_LO); 3094 3095 stats->tx128to255octets_gb += 3096 xgbe_mmc_read(pdata, MMC_TX128TO255OCTETS_GB_LO); 3097 3098 stats->tx256to511octets_gb += 3099 xgbe_mmc_read(pdata, MMC_TX256TO511OCTETS_GB_LO); 3100 3101 stats->tx512to1023octets_gb += 3102 xgbe_mmc_read(pdata, MMC_TX512TO1023OCTETS_GB_LO); 3103 3104 stats->tx1024tomaxoctets_gb += 3105 xgbe_mmc_read(pdata, MMC_TX1024TOMAXOCTETS_GB_LO); 3106 3107 stats->txunicastframes_gb += 3108 xgbe_mmc_read(pdata, MMC_TXUNICASTFRAMES_GB_LO); 3109 3110 stats->txmulticastframes_gb += 3111 xgbe_mmc_read(pdata, MMC_TXMULTICASTFRAMES_GB_LO); 3112 3113 stats->txbroadcastframes_g += 3114 xgbe_mmc_read(pdata, MMC_TXBROADCASTFRAMES_GB_LO); 3115 3116 stats->txunderflowerror += 3117 xgbe_mmc_read(pdata, MMC_TXUNDERFLOWERROR_LO); 3118 3119 stats->txoctetcount_g += 3120 xgbe_mmc_read(pdata, MMC_TXOCTETCOUNT_G_LO); 3121 3122 stats->txframecount_g += 3123 xgbe_mmc_read(pdata, MMC_TXFRAMECOUNT_G_LO); 3124 3125 stats->txpauseframes += 3126 xgbe_mmc_read(pdata, MMC_TXPAUSEFRAMES_LO); 3127 3128 stats->txvlanframes_g += 3129 xgbe_mmc_read(pdata, MMC_TXVLANFRAMES_G_LO); 3130 3131 stats->rxframecount_gb += 3132 xgbe_mmc_read(pdata, MMC_RXFRAMECOUNT_GB_LO); 3133 3134 stats->rxoctetcount_gb += 3135 xgbe_mmc_read(pdata, MMC_RXOCTETCOUNT_GB_LO); 3136 3137 stats->rxoctetcount_g += 3138 xgbe_mmc_read(pdata, MMC_RXOCTETCOUNT_G_LO); 3139 3140 stats->rxbroadcastframes_g += 3141 xgbe_mmc_read(pdata, MMC_RXBROADCASTFRAMES_G_LO); 3142 3143 stats->rxmulticastframes_g += 3144 xgbe_mmc_read(pdata, MMC_RXMULTICASTFRAMES_G_LO); 3145 3146 stats->rxcrcerror += 3147 xgbe_mmc_read(pdata, MMC_RXCRCERROR_LO); 3148 3149 stats->rxrunterror += 3150 xgbe_mmc_read(pdata, MMC_RXRUNTERROR); 3151 3152 stats->rxjabbererror += 3153 xgbe_mmc_read(pdata, MMC_RXJABBERERROR); 3154 3155 stats->rxundersize_g += 3156 xgbe_mmc_read(pdata, MMC_RXUNDERSIZE_G); 3157 3158 stats->rxoversize_g += 3159 xgbe_mmc_read(pdata, MMC_RXOVERSIZE_G); 3160 3161 stats->rx64octets_gb += 3162 xgbe_mmc_read(pdata, MMC_RX64OCTETS_GB_LO); 3163 3164 stats->rx65to127octets_gb += 3165 xgbe_mmc_read(pdata, MMC_RX65TO127OCTETS_GB_LO); 3166 3167 stats->rx128to255octets_gb += 3168 xgbe_mmc_read(pdata, MMC_RX128TO255OCTETS_GB_LO); 3169 3170 stats->rx256to511octets_gb += 3171 xgbe_mmc_read(pdata, MMC_RX256TO511OCTETS_GB_LO); 3172 3173 stats->rx512to1023octets_gb += 3174 xgbe_mmc_read(pdata, MMC_RX512TO1023OCTETS_GB_LO); 3175 3176 stats->rx1024tomaxoctets_gb += 3177 xgbe_mmc_read(pdata, MMC_RX1024TOMAXOCTETS_GB_LO); 3178 3179 stats->rxunicastframes_g += 3180 xgbe_mmc_read(pdata, MMC_RXUNICASTFRAMES_G_LO); 3181 3182 stats->rxlengtherror += 3183 xgbe_mmc_read(pdata, MMC_RXLENGTHERROR_LO); 3184 3185 stats->rxoutofrangetype += 3186 xgbe_mmc_read(pdata, MMC_RXOUTOFRANGETYPE_LO); 3187 3188 stats->rxpauseframes += 3189 xgbe_mmc_read(pdata, MMC_RXPAUSEFRAMES_LO); 3190 3191 stats->rxfifooverflow += 3192 xgbe_mmc_read(pdata, MMC_RXFIFOOVERFLOW_LO); 3193 3194 stats->rxvlanframes_gb += 3195 xgbe_mmc_read(pdata, MMC_RXVLANFRAMES_GB_LO); 3196 3197 stats->rxwatchdogerror += 3198 xgbe_mmc_read(pdata, MMC_RXWATCHDOGERROR); 3199 3200 /* Un-freeze counters */ 3201 XGMAC_IOWRITE_BITS(pdata, MMC_CR, MCF, 0); 3202 } 3203 3204 static void xgbe_config_mmc(struct xgbe_prv_data *pdata) 3205 { 3206 /* Set counters to reset on read */ 3207 XGMAC_IOWRITE_BITS(pdata, MMC_CR, ROR, 1); 3208 3209 /* Reset the counters */ 3210 XGMAC_IOWRITE_BITS(pdata, MMC_CR, CR, 1); 3211 } 3212 3213 static void xgbe_txq_prepare_tx_stop(struct xgbe_prv_data *pdata, 3214 unsigned int queue) 3215 { 3216 unsigned int tx_status; 3217 unsigned long tx_timeout; 3218 3219 /* The Tx engine cannot be stopped if it is actively processing 3220 * packets. Wait for the Tx queue to empty the Tx fifo. Don't 3221 * wait forever though... 3222 */ 3223 tx_timeout = jiffies + (XGBE_DMA_STOP_TIMEOUT * HZ); 3224 while (time_before(jiffies, tx_timeout)) { 3225 tx_status = XGMAC_MTL_IOREAD(pdata, queue, MTL_Q_TQDR); 3226 if ((XGMAC_GET_BITS(tx_status, MTL_Q_TQDR, TRCSTS) != 1) && 3227 (XGMAC_GET_BITS(tx_status, MTL_Q_TQDR, TXQSTS) == 0)) 3228 break; 3229 3230 usleep_range(500, 1000); 3231 } 3232 3233 if (!time_before(jiffies, tx_timeout)) 3234 netdev_info(pdata->netdev, 3235 "timed out waiting for Tx queue %u to empty\n", 3236 queue); 3237 } 3238 3239 static void xgbe_prepare_tx_stop(struct xgbe_prv_data *pdata, 3240 unsigned int queue) 3241 { 3242 unsigned int tx_dsr, tx_pos, tx_qidx; 3243 unsigned int tx_status; 3244 unsigned long tx_timeout; 3245 3246 if (XGMAC_GET_BITS(pdata->hw_feat.version, MAC_VR, SNPSVER) > 0x20) 3247 return xgbe_txq_prepare_tx_stop(pdata, queue); 3248 3249 /* Calculate the status register to read and the position within */ 3250 if (queue < DMA_DSRX_FIRST_QUEUE) { 3251 tx_dsr = DMA_DSR0; 3252 tx_pos = (queue * DMA_DSR_Q_WIDTH) + DMA_DSR0_TPS_START; 3253 } else { 3254 tx_qidx = queue - DMA_DSRX_FIRST_QUEUE; 3255 3256 tx_dsr = DMA_DSR1 + ((tx_qidx / DMA_DSRX_QPR) * DMA_DSRX_INC); 3257 tx_pos = ((tx_qidx % DMA_DSRX_QPR) * DMA_DSR_Q_WIDTH) + 3258 DMA_DSRX_TPS_START; 3259 } 3260 3261 /* The Tx engine cannot be stopped if it is actively processing 3262 * descriptors. Wait for the Tx engine to enter the stopped or 3263 * suspended state. Don't wait forever though... 3264 */ 3265 tx_timeout = jiffies + (XGBE_DMA_STOP_TIMEOUT * HZ); 3266 while (time_before(jiffies, tx_timeout)) { 3267 tx_status = XGMAC_IOREAD(pdata, tx_dsr); 3268 tx_status = GET_BITS(tx_status, tx_pos, DMA_DSR_TPS_WIDTH); 3269 if ((tx_status == DMA_TPS_STOPPED) || 3270 (tx_status == DMA_TPS_SUSPENDED)) 3271 break; 3272 3273 usleep_range(500, 1000); 3274 } 3275 3276 if (!time_before(jiffies, tx_timeout)) 3277 netdev_info(pdata->netdev, 3278 "timed out waiting for Tx DMA channel %u to stop\n", 3279 queue); 3280 } 3281 3282 static void xgbe_enable_tx(struct xgbe_prv_data *pdata) 3283 { 3284 unsigned int i; 3285 3286 /* Enable each Tx DMA channel */ 3287 for (i = 0; i < pdata->channel_count; i++) { 3288 if (!pdata->channel[i]->tx_ring) 3289 break; 3290 3291 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, ST, 1); 3292 } 3293 3294 /* Enable each Tx queue */ 3295 for (i = 0; i < pdata->tx_q_count; i++) 3296 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TXQEN, 3297 MTL_Q_ENABLED); 3298 3299 /* Enable MAC Tx */ 3300 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 1); 3301 } 3302 3303 static void xgbe_disable_tx(struct xgbe_prv_data *pdata) 3304 { 3305 unsigned int i; 3306 3307 /* Prepare for Tx DMA channel stop */ 3308 for (i = 0; i < pdata->tx_q_count; i++) 3309 xgbe_prepare_tx_stop(pdata, i); 3310 3311 /* Disable MAC Tx */ 3312 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 0); 3313 3314 /* Disable each Tx queue */ 3315 for (i = 0; i < pdata->tx_q_count; i++) 3316 XGMAC_MTL_IOWRITE_BITS(pdata, i, MTL_Q_TQOMR, TXQEN, 0); 3317 3318 /* Disable each Tx DMA channel */ 3319 for (i = 0; i < pdata->channel_count; i++) { 3320 if (!pdata->channel[i]->tx_ring) 3321 break; 3322 3323 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, ST, 0); 3324 } 3325 } 3326 3327 static void xgbe_prepare_rx_stop(struct xgbe_prv_data *pdata, 3328 unsigned int queue) 3329 { 3330 unsigned int rx_status; 3331 unsigned long rx_timeout; 3332 3333 /* The Rx engine cannot be stopped if it is actively processing 3334 * packets. Wait for the Rx queue to empty the Rx fifo. Don't 3335 * wait forever though... 3336 */ 3337 rx_timeout = jiffies + (XGBE_DMA_STOP_TIMEOUT * HZ); 3338 while (time_before(jiffies, rx_timeout)) { 3339 rx_status = XGMAC_MTL_IOREAD(pdata, queue, MTL_Q_RQDR); 3340 if ((XGMAC_GET_BITS(rx_status, MTL_Q_RQDR, PRXQ) == 0) && 3341 (XGMAC_GET_BITS(rx_status, MTL_Q_RQDR, RXQSTS) == 0)) 3342 break; 3343 3344 usleep_range(500, 1000); 3345 } 3346 3347 if (!time_before(jiffies, rx_timeout)) 3348 netdev_info(pdata->netdev, 3349 "timed out waiting for Rx queue %u to empty\n", 3350 queue); 3351 } 3352 3353 static void xgbe_enable_rx(struct xgbe_prv_data *pdata) 3354 { 3355 unsigned int reg_val, i; 3356 3357 /* Enable each Rx DMA channel */ 3358 for (i = 0; i < pdata->channel_count; i++) { 3359 if (!pdata->channel[i]->rx_ring) 3360 break; 3361 3362 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, SR, 1); 3363 } 3364 3365 /* Enable each Rx queue */ 3366 reg_val = 0; 3367 for (i = 0; i < pdata->rx_q_count; i++) 3368 reg_val |= (0x02 << (i << 1)); 3369 XGMAC_IOWRITE(pdata, MAC_RQC0R, reg_val); 3370 3371 /* Enable MAC Rx */ 3372 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, DCRCC, 1); 3373 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, CST, 1); 3374 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, ACS, 1); 3375 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, RE, 1); 3376 } 3377 3378 static void xgbe_disable_rx(struct xgbe_prv_data *pdata) 3379 { 3380 unsigned int i; 3381 3382 /* Disable MAC Rx */ 3383 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, DCRCC, 0); 3384 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, CST, 0); 3385 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, ACS, 0); 3386 XGMAC_IOWRITE_BITS(pdata, MAC_RCR, RE, 0); 3387 3388 /* Prepare for Rx DMA channel stop */ 3389 for (i = 0; i < pdata->rx_q_count; i++) 3390 xgbe_prepare_rx_stop(pdata, i); 3391 3392 /* Disable each Rx queue */ 3393 XGMAC_IOWRITE(pdata, MAC_RQC0R, 0); 3394 3395 /* Disable each Rx DMA channel */ 3396 for (i = 0; i < pdata->channel_count; i++) { 3397 if (!pdata->channel[i]->rx_ring) 3398 break; 3399 3400 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, SR, 0); 3401 } 3402 } 3403 3404 static void xgbe_powerup_tx(struct xgbe_prv_data *pdata) 3405 { 3406 unsigned int i; 3407 3408 /* Enable each Tx DMA channel */ 3409 for (i = 0; i < pdata->channel_count; i++) { 3410 if (!pdata->channel[i]->tx_ring) 3411 break; 3412 3413 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, ST, 1); 3414 } 3415 3416 /* Enable MAC Tx */ 3417 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 1); 3418 } 3419 3420 static void xgbe_powerdown_tx(struct xgbe_prv_data *pdata) 3421 { 3422 unsigned int i; 3423 3424 /* Prepare for Tx DMA channel stop */ 3425 for (i = 0; i < pdata->tx_q_count; i++) 3426 xgbe_prepare_tx_stop(pdata, i); 3427 3428 /* Disable MAC Tx */ 3429 XGMAC_IOWRITE_BITS(pdata, MAC_TCR, TE, 0); 3430 3431 /* Disable each Tx DMA channel */ 3432 for (i = 0; i < pdata->channel_count; i++) { 3433 if (!pdata->channel[i]->tx_ring) 3434 break; 3435 3436 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_TCR, ST, 0); 3437 } 3438 } 3439 3440 static void xgbe_powerup_rx(struct xgbe_prv_data *pdata) 3441 { 3442 unsigned int i; 3443 3444 /* Enable each Rx DMA channel */ 3445 for (i = 0; i < pdata->channel_count; i++) { 3446 if (!pdata->channel[i]->rx_ring) 3447 break; 3448 3449 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, SR, 1); 3450 } 3451 } 3452 3453 static void xgbe_powerdown_rx(struct xgbe_prv_data *pdata) 3454 { 3455 unsigned int i; 3456 3457 /* Disable each Rx DMA channel */ 3458 for (i = 0; i < pdata->channel_count; i++) { 3459 if (!pdata->channel[i]->rx_ring) 3460 break; 3461 3462 XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_RCR, SR, 0); 3463 } 3464 } 3465 3466 static int xgbe_init(struct xgbe_prv_data *pdata) 3467 { 3468 struct xgbe_desc_if *desc_if = &pdata->desc_if; 3469 int ret; 3470 3471 DBGPR("-->xgbe_init\n"); 3472 3473 /* Flush Tx queues */ 3474 ret = xgbe_flush_tx_queues(pdata); 3475 if (ret) { 3476 netdev_err(pdata->netdev, "error flushing TX queues\n"); 3477 return ret; 3478 } 3479 3480 /* 3481 * Initialize DMA related features 3482 */ 3483 xgbe_config_dma_bus(pdata); 3484 xgbe_config_dma_cache(pdata); 3485 xgbe_config_osp_mode(pdata); 3486 xgbe_config_pbl_val(pdata); 3487 xgbe_config_rx_coalesce(pdata); 3488 xgbe_config_tx_coalesce(pdata); 3489 xgbe_config_rx_buffer_size(pdata); 3490 xgbe_config_tso_mode(pdata); 3491 xgbe_config_sph_mode(pdata); 3492 xgbe_config_rss(pdata); 3493 desc_if->wrapper_tx_desc_init(pdata); 3494 desc_if->wrapper_rx_desc_init(pdata); 3495 xgbe_enable_dma_interrupts(pdata); 3496 3497 /* 3498 * Initialize MTL related features 3499 */ 3500 xgbe_config_mtl_mode(pdata); 3501 xgbe_config_queue_mapping(pdata); 3502 xgbe_config_tsf_mode(pdata, pdata->tx_sf_mode); 3503 xgbe_config_rsf_mode(pdata, pdata->rx_sf_mode); 3504 xgbe_config_tx_threshold(pdata, pdata->tx_threshold); 3505 xgbe_config_rx_threshold(pdata, pdata->rx_threshold); 3506 xgbe_config_tx_fifo_size(pdata); 3507 xgbe_config_rx_fifo_size(pdata); 3508 /*TODO: Error Packet and undersized good Packet forwarding enable 3509 (FEP and FUP) 3510 */ 3511 xgbe_config_dcb_tc(pdata); 3512 xgbe_enable_mtl_interrupts(pdata); 3513 3514 /* 3515 * Initialize MAC related features 3516 */ 3517 xgbe_config_mac_address(pdata); 3518 xgbe_config_rx_mode(pdata); 3519 xgbe_config_jumbo_enable(pdata); 3520 xgbe_config_flow_control(pdata); 3521 xgbe_config_mac_speed(pdata); 3522 xgbe_config_checksum_offload(pdata); 3523 xgbe_config_vlan_support(pdata); 3524 xgbe_config_mmc(pdata); 3525 xgbe_enable_mac_interrupts(pdata); 3526 3527 /* 3528 * Initialize ECC related features 3529 */ 3530 xgbe_enable_ecc_interrupts(pdata); 3531 3532 DBGPR("<--xgbe_init\n"); 3533 3534 return 0; 3535 } 3536 3537 void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *hw_if) 3538 { 3539 DBGPR("-->xgbe_init_function_ptrs\n"); 3540 3541 hw_if->tx_complete = xgbe_tx_complete; 3542 3543 hw_if->set_mac_address = xgbe_set_mac_address; 3544 hw_if->config_rx_mode = xgbe_config_rx_mode; 3545 3546 hw_if->enable_rx_csum = xgbe_enable_rx_csum; 3547 hw_if->disable_rx_csum = xgbe_disable_rx_csum; 3548 3549 hw_if->enable_rx_vlan_stripping = xgbe_enable_rx_vlan_stripping; 3550 hw_if->disable_rx_vlan_stripping = xgbe_disable_rx_vlan_stripping; 3551 hw_if->enable_rx_vlan_filtering = xgbe_enable_rx_vlan_filtering; 3552 hw_if->disable_rx_vlan_filtering = xgbe_disable_rx_vlan_filtering; 3553 hw_if->update_vlan_hash_table = xgbe_update_vlan_hash_table; 3554 3555 hw_if->read_mmd_regs = xgbe_read_mmd_regs; 3556 hw_if->write_mmd_regs = xgbe_write_mmd_regs; 3557 3558 hw_if->set_speed = xgbe_set_speed; 3559 3560 hw_if->set_ext_mii_mode = xgbe_set_ext_mii_mode; 3561 hw_if->read_ext_mii_regs = xgbe_read_ext_mii_regs; 3562 hw_if->write_ext_mii_regs = xgbe_write_ext_mii_regs; 3563 3564 hw_if->set_gpio = xgbe_set_gpio; 3565 hw_if->clr_gpio = xgbe_clr_gpio; 3566 3567 hw_if->enable_tx = xgbe_enable_tx; 3568 hw_if->disable_tx = xgbe_disable_tx; 3569 hw_if->enable_rx = xgbe_enable_rx; 3570 hw_if->disable_rx = xgbe_disable_rx; 3571 3572 hw_if->powerup_tx = xgbe_powerup_tx; 3573 hw_if->powerdown_tx = xgbe_powerdown_tx; 3574 hw_if->powerup_rx = xgbe_powerup_rx; 3575 hw_if->powerdown_rx = xgbe_powerdown_rx; 3576 3577 hw_if->dev_xmit = xgbe_dev_xmit; 3578 hw_if->dev_read = xgbe_dev_read; 3579 hw_if->enable_int = xgbe_enable_int; 3580 hw_if->disable_int = xgbe_disable_int; 3581 hw_if->init = xgbe_init; 3582 hw_if->exit = xgbe_exit; 3583 3584 /* Descriptor related Sequences have to be initialized here */ 3585 hw_if->tx_desc_init = xgbe_tx_desc_init; 3586 hw_if->rx_desc_init = xgbe_rx_desc_init; 3587 hw_if->tx_desc_reset = xgbe_tx_desc_reset; 3588 hw_if->rx_desc_reset = xgbe_rx_desc_reset; 3589 hw_if->is_last_desc = xgbe_is_last_desc; 3590 hw_if->is_context_desc = xgbe_is_context_desc; 3591 hw_if->tx_start_xmit = xgbe_tx_start_xmit; 3592 3593 /* For FLOW ctrl */ 3594 hw_if->config_tx_flow_control = xgbe_config_tx_flow_control; 3595 hw_if->config_rx_flow_control = xgbe_config_rx_flow_control; 3596 3597 /* For RX coalescing */ 3598 hw_if->config_rx_coalesce = xgbe_config_rx_coalesce; 3599 hw_if->config_tx_coalesce = xgbe_config_tx_coalesce; 3600 hw_if->usec_to_riwt = xgbe_usec_to_riwt; 3601 hw_if->riwt_to_usec = xgbe_riwt_to_usec; 3602 3603 /* For RX and TX threshold config */ 3604 hw_if->config_rx_threshold = xgbe_config_rx_threshold; 3605 hw_if->config_tx_threshold = xgbe_config_tx_threshold; 3606 3607 /* For RX and TX Store and Forward Mode config */ 3608 hw_if->config_rsf_mode = xgbe_config_rsf_mode; 3609 hw_if->config_tsf_mode = xgbe_config_tsf_mode; 3610 3611 /* For TX DMA Operating on Second Frame config */ 3612 hw_if->config_osp_mode = xgbe_config_osp_mode; 3613 3614 /* For MMC statistics support */ 3615 hw_if->tx_mmc_int = xgbe_tx_mmc_int; 3616 hw_if->rx_mmc_int = xgbe_rx_mmc_int; 3617 hw_if->read_mmc_stats = xgbe_read_mmc_stats; 3618 3619 /* For PTP config */ 3620 hw_if->config_tstamp = xgbe_config_tstamp; 3621 hw_if->update_tstamp_addend = xgbe_update_tstamp_addend; 3622 hw_if->set_tstamp_time = xgbe_set_tstamp_time; 3623 hw_if->get_tstamp_time = xgbe_get_tstamp_time; 3624 hw_if->get_tx_tstamp = xgbe_get_tx_tstamp; 3625 3626 /* For Data Center Bridging config */ 3627 hw_if->config_tc = xgbe_config_tc; 3628 hw_if->config_dcb_tc = xgbe_config_dcb_tc; 3629 hw_if->config_dcb_pfc = xgbe_config_dcb_pfc; 3630 3631 /* For Receive Side Scaling */ 3632 hw_if->enable_rss = xgbe_enable_rss; 3633 hw_if->disable_rss = xgbe_disable_rss; 3634 hw_if->set_rss_hash_key = xgbe_set_rss_hash_key; 3635 hw_if->set_rss_lookup_table = xgbe_set_rss_lookup_table; 3636 3637 /* For ECC */ 3638 hw_if->disable_ecc_ded = xgbe_disable_ecc_ded; 3639 hw_if->disable_ecc_sec = xgbe_disable_ecc_sec; 3640 3641 /* For VXLAN */ 3642 hw_if->enable_vxlan = xgbe_enable_vxlan; 3643 hw_if->disable_vxlan = xgbe_disable_vxlan; 3644 hw_if->set_vxlan_id = xgbe_set_vxlan_id; 3645 3646 DBGPR("<--xgbe_init_function_ptrs\n"); 3647 } 3648