1 // SPDX-License-Identifier: GPL-2.0+ 2 // Copyright (c) 2016-2017 Hisilicon Limited. 3 4 #include "hclge_main.h" 5 #include "hclge_dcb.h" 6 #include "hclge_tm.h" 7 #include "hnae3.h" 8 9 #define BW_PERCENT 100 10 11 static int hclge_ieee_ets_to_tm_info(struct hclge_dev *hdev, 12 struct ieee_ets *ets) 13 { 14 u8 i; 15 16 for (i = 0; i < HNAE3_MAX_TC; i++) { 17 switch (ets->tc_tsa[i]) { 18 case IEEE_8021QAZ_TSA_STRICT: 19 hdev->tm_info.tc_info[i].tc_sch_mode = 20 HCLGE_SCH_MODE_SP; 21 hdev->tm_info.pg_info[0].tc_dwrr[i] = 0; 22 break; 23 case IEEE_8021QAZ_TSA_ETS: 24 hdev->tm_info.tc_info[i].tc_sch_mode = 25 HCLGE_SCH_MODE_DWRR; 26 hdev->tm_info.pg_info[0].tc_dwrr[i] = 27 ets->tc_tx_bw[i]; 28 break; 29 default: 30 /* Hardware only supports SP (strict priority) 31 * or ETS (enhanced transmission selection) 32 * algorithms, if we receive some other value 33 * from dcbnl, then throw an error. 34 */ 35 return -EINVAL; 36 } 37 } 38 39 hclge_tm_prio_tc_info_update(hdev, ets->prio_tc); 40 41 return 0; 42 } 43 44 static void hclge_tm_info_to_ieee_ets(struct hclge_dev *hdev, 45 struct ieee_ets *ets) 46 { 47 u32 i; 48 49 memset(ets, 0, sizeof(*ets)); 50 ets->willing = 1; 51 ets->ets_cap = hdev->tc_max; 52 53 for (i = 0; i < HNAE3_MAX_TC; i++) { 54 ets->prio_tc[i] = hdev->tm_info.prio_tc[i]; 55 ets->tc_tx_bw[i] = hdev->tm_info.pg_info[0].tc_dwrr[i]; 56 57 if (hdev->tm_info.tc_info[i].tc_sch_mode == 58 HCLGE_SCH_MODE_SP) 59 ets->tc_tsa[i] = IEEE_8021QAZ_TSA_STRICT; 60 else 61 ets->tc_tsa[i] = IEEE_8021QAZ_TSA_ETS; 62 } 63 } 64 65 /* IEEE std */ 66 static int hclge_ieee_getets(struct hnae3_handle *h, struct ieee_ets *ets) 67 { 68 struct hclge_vport *vport = hclge_get_vport(h); 69 struct hclge_dev *hdev = vport->back; 70 71 hclge_tm_info_to_ieee_ets(hdev, ets); 72 73 return 0; 74 } 75 76 static int hclge_dcb_common_validate(struct hclge_dev *hdev, u8 num_tc, 77 u8 *prio_tc) 78 { 79 int i; 80 81 if (num_tc > hdev->tc_max) { 82 dev_err(&hdev->pdev->dev, 83 "tc num checking failed, %u > tc_max(%u)\n", 84 num_tc, hdev->tc_max); 85 return -EINVAL; 86 } 87 88 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) { 89 if (prio_tc[i] >= num_tc) { 90 dev_err(&hdev->pdev->dev, 91 "prio_tc[%d] checking failed, %u >= num_tc(%u)\n", 92 i, prio_tc[i], num_tc); 93 return -EINVAL; 94 } 95 } 96 97 if (num_tc > hdev->vport[0].alloc_tqps) { 98 dev_err(&hdev->pdev->dev, 99 "allocated tqp checking failed, %u > tqp(%u)\n", 100 num_tc, hdev->vport[0].alloc_tqps); 101 return -EINVAL; 102 } 103 104 return 0; 105 } 106 107 static u8 hclge_ets_tc_changed(struct hclge_dev *hdev, struct ieee_ets *ets, 108 bool *changed) 109 { 110 u8 max_tc_id = 0; 111 u8 i; 112 113 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) { 114 if (ets->prio_tc[i] != hdev->tm_info.prio_tc[i]) 115 *changed = true; 116 117 if (ets->prio_tc[i] > max_tc_id) 118 max_tc_id = ets->prio_tc[i]; 119 } 120 121 /* return max tc number, max tc id need to plus 1 */ 122 return max_tc_id + 1; 123 } 124 125 static int hclge_ets_sch_mode_validate(struct hclge_dev *hdev, 126 struct ieee_ets *ets, bool *changed) 127 { 128 bool has_ets_tc = false; 129 u32 total_ets_bw = 0; 130 u8 i; 131 132 for (i = 0; i < HNAE3_MAX_TC; i++) { 133 switch (ets->tc_tsa[i]) { 134 case IEEE_8021QAZ_TSA_STRICT: 135 if (hdev->tm_info.tc_info[i].tc_sch_mode != 136 HCLGE_SCH_MODE_SP) 137 *changed = true; 138 break; 139 case IEEE_8021QAZ_TSA_ETS: 140 /* The hardware will switch to sp mode if bandwidth is 141 * 0, so limit ets bandwidth must be greater than 0. 142 */ 143 if (!ets->tc_tx_bw[i]) { 144 dev_err(&hdev->pdev->dev, 145 "tc%u ets bw cannot be 0\n", i); 146 return -EINVAL; 147 } 148 149 if (hdev->tm_info.tc_info[i].tc_sch_mode != 150 HCLGE_SCH_MODE_DWRR) 151 *changed = true; 152 153 total_ets_bw += ets->tc_tx_bw[i]; 154 has_ets_tc = true; 155 break; 156 default: 157 return -EINVAL; 158 } 159 } 160 161 if (has_ets_tc && total_ets_bw != BW_PERCENT) 162 return -EINVAL; 163 164 return 0; 165 } 166 167 static int hclge_ets_validate(struct hclge_dev *hdev, struct ieee_ets *ets, 168 u8 *tc, bool *changed) 169 { 170 u8 tc_num; 171 int ret; 172 173 tc_num = hclge_ets_tc_changed(hdev, ets, changed); 174 175 ret = hclge_dcb_common_validate(hdev, tc_num, ets->prio_tc); 176 if (ret) 177 return ret; 178 179 ret = hclge_ets_sch_mode_validate(hdev, ets, changed); 180 if (ret) 181 return ret; 182 183 *tc = tc_num; 184 if (*tc != hdev->tm_info.num_tc) 185 *changed = true; 186 187 return 0; 188 } 189 190 static int hclge_map_update(struct hclge_dev *hdev) 191 { 192 int ret; 193 194 ret = hclge_tm_schd_setup_hw(hdev); 195 if (ret) 196 return ret; 197 198 ret = hclge_pause_setup_hw(hdev, false); 199 if (ret) 200 return ret; 201 202 ret = hclge_buffer_alloc(hdev); 203 if (ret) 204 return ret; 205 206 hclge_rss_indir_init_cfg(hdev); 207 208 return hclge_rss_init_hw(hdev); 209 } 210 211 static int hclge_notify_down_uinit(struct hclge_dev *hdev) 212 { 213 int ret; 214 215 ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT); 216 if (ret) 217 return ret; 218 219 return hclge_notify_client(hdev, HNAE3_UNINIT_CLIENT); 220 } 221 222 static int hclge_notify_init_up(struct hclge_dev *hdev) 223 { 224 int ret; 225 226 ret = hclge_notify_client(hdev, HNAE3_INIT_CLIENT); 227 if (ret) 228 return ret; 229 230 return hclge_notify_client(hdev, HNAE3_UP_CLIENT); 231 } 232 233 static int hclge_ieee_setets(struct hnae3_handle *h, struct ieee_ets *ets) 234 { 235 struct hclge_vport *vport = hclge_get_vport(h); 236 struct net_device *netdev = h->kinfo.netdev; 237 struct hclge_dev *hdev = vport->back; 238 bool map_changed = false; 239 u8 num_tc = 0; 240 int ret; 241 242 if (!(hdev->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) || 243 hdev->flag & HCLGE_FLAG_MQPRIO_ENABLE) 244 return -EINVAL; 245 246 ret = hclge_ets_validate(hdev, ets, &num_tc, &map_changed); 247 if (ret) 248 return ret; 249 250 if (map_changed) { 251 netif_dbg(h, drv, netdev, "set ets\n"); 252 253 ret = hclge_notify_down_uinit(hdev); 254 if (ret) 255 return ret; 256 } 257 258 hclge_tm_schd_info_update(hdev, num_tc); 259 if (num_tc > 1) 260 hdev->flag |= HCLGE_FLAG_DCB_ENABLE; 261 else 262 hdev->flag &= ~HCLGE_FLAG_DCB_ENABLE; 263 264 ret = hclge_ieee_ets_to_tm_info(hdev, ets); 265 if (ret) 266 goto err_out; 267 268 if (map_changed) { 269 ret = hclge_map_update(hdev); 270 if (ret) 271 goto err_out; 272 273 return hclge_notify_init_up(hdev); 274 } 275 276 return hclge_tm_dwrr_cfg(hdev); 277 278 err_out: 279 if (!map_changed) 280 return ret; 281 282 hclge_notify_init_up(hdev); 283 284 return ret; 285 } 286 287 static int hclge_ieee_getpfc(struct hnae3_handle *h, struct ieee_pfc *pfc) 288 { 289 struct hclge_vport *vport = hclge_get_vport(h); 290 struct hclge_dev *hdev = vport->back; 291 int ret; 292 293 memset(pfc, 0, sizeof(*pfc)); 294 pfc->pfc_cap = hdev->pfc_max; 295 pfc->pfc_en = hdev->tm_info.pfc_en; 296 297 ret = hclge_mac_update_stats(hdev); 298 if (ret) { 299 dev_err(&hdev->pdev->dev, 300 "failed to update MAC stats, ret = %d.\n", ret); 301 return ret; 302 } 303 304 hclge_pfc_tx_stats_get(hdev, pfc->requests); 305 hclge_pfc_rx_stats_get(hdev, pfc->indications); 306 307 return 0; 308 } 309 310 static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc *pfc) 311 { 312 struct hclge_vport *vport = hclge_get_vport(h); 313 struct net_device *netdev = h->kinfo.netdev; 314 struct hclge_dev *hdev = vport->back; 315 u8 i, j, pfc_map, *prio_tc; 316 int ret; 317 318 if (!(hdev->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)) 319 return -EINVAL; 320 321 if (pfc->pfc_en == hdev->tm_info.pfc_en) 322 return 0; 323 324 prio_tc = hdev->tm_info.prio_tc; 325 pfc_map = 0; 326 327 for (i = 0; i < hdev->tm_info.num_tc; i++) { 328 for (j = 0; j < HNAE3_MAX_USER_PRIO; j++) { 329 if ((prio_tc[j] == i) && (pfc->pfc_en & BIT(j))) { 330 pfc_map |= BIT(i); 331 break; 332 } 333 } 334 } 335 336 hdev->tm_info.hw_pfc_map = pfc_map; 337 hdev->tm_info.pfc_en = pfc->pfc_en; 338 339 netif_dbg(h, drv, netdev, 340 "set pfc: pfc_en=%x, pfc_map=%x, num_tc=%u\n", 341 pfc->pfc_en, pfc_map, hdev->tm_info.num_tc); 342 343 hclge_tm_pfc_info_update(hdev); 344 345 ret = hclge_pause_setup_hw(hdev, false); 346 if (ret) 347 return ret; 348 349 ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT); 350 if (ret) 351 return ret; 352 353 ret = hclge_buffer_alloc(hdev); 354 if (ret) { 355 hclge_notify_client(hdev, HNAE3_UP_CLIENT); 356 return ret; 357 } 358 359 return hclge_notify_client(hdev, HNAE3_UP_CLIENT); 360 } 361 362 /* DCBX configuration */ 363 static u8 hclge_getdcbx(struct hnae3_handle *h) 364 { 365 struct hclge_vport *vport = hclge_get_vport(h); 366 struct hclge_dev *hdev = vport->back; 367 368 if (hdev->flag & HCLGE_FLAG_MQPRIO_ENABLE) 369 return 0; 370 371 return hdev->dcbx_cap; 372 } 373 374 static u8 hclge_setdcbx(struct hnae3_handle *h, u8 mode) 375 { 376 struct hclge_vport *vport = hclge_get_vport(h); 377 struct net_device *netdev = h->kinfo.netdev; 378 struct hclge_dev *hdev = vport->back; 379 380 netif_dbg(h, drv, netdev, "set dcbx: mode=%u\n", mode); 381 382 /* No support for LLD_MANAGED modes or CEE */ 383 if ((mode & DCB_CAP_DCBX_LLD_MANAGED) || 384 (mode & DCB_CAP_DCBX_VER_CEE) || 385 !(mode & DCB_CAP_DCBX_HOST)) 386 return 1; 387 388 hdev->dcbx_cap = mode; 389 390 return 0; 391 } 392 393 static int hclge_mqprio_qopt_check(struct hclge_dev *hdev, 394 struct tc_mqprio_qopt_offload *mqprio_qopt) 395 { 396 u16 queue_sum = 0; 397 int ret; 398 int i; 399 400 if (!mqprio_qopt->qopt.num_tc) { 401 mqprio_qopt->qopt.num_tc = 1; 402 return 0; 403 } 404 405 ret = hclge_dcb_common_validate(hdev, mqprio_qopt->qopt.num_tc, 406 mqprio_qopt->qopt.prio_tc_map); 407 if (ret) 408 return ret; 409 410 for (i = 0; i < mqprio_qopt->qopt.num_tc; i++) { 411 if (!is_power_of_2(mqprio_qopt->qopt.count[i])) { 412 dev_err(&hdev->pdev->dev, 413 "qopt queue count must be power of 2\n"); 414 return -EINVAL; 415 } 416 417 if (mqprio_qopt->qopt.count[i] > hdev->pf_rss_size_max) { 418 dev_err(&hdev->pdev->dev, 419 "qopt queue count should be no more than %u\n", 420 hdev->pf_rss_size_max); 421 return -EINVAL; 422 } 423 424 if (mqprio_qopt->qopt.offset[i] != queue_sum) { 425 dev_err(&hdev->pdev->dev, 426 "qopt queue offset must start from 0, and being continuous\n"); 427 return -EINVAL; 428 } 429 430 if (mqprio_qopt->min_rate[i] || mqprio_qopt->max_rate[i]) { 431 dev_err(&hdev->pdev->dev, 432 "qopt tx_rate is not supported\n"); 433 return -EOPNOTSUPP; 434 } 435 436 queue_sum = mqprio_qopt->qopt.offset[i]; 437 queue_sum += mqprio_qopt->qopt.count[i]; 438 } 439 if (hdev->vport[0].alloc_tqps < queue_sum) { 440 dev_err(&hdev->pdev->dev, 441 "qopt queue count sum should be less than %u\n", 442 hdev->vport[0].alloc_tqps); 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 449 static void hclge_sync_mqprio_qopt(struct hnae3_tc_info *tc_info, 450 struct tc_mqprio_qopt_offload *mqprio_qopt) 451 { 452 memset(tc_info, 0, sizeof(*tc_info)); 453 tc_info->num_tc = mqprio_qopt->qopt.num_tc; 454 memcpy(tc_info->prio_tc, mqprio_qopt->qopt.prio_tc_map, 455 sizeof_field(struct hnae3_tc_info, prio_tc)); 456 memcpy(tc_info->tqp_count, mqprio_qopt->qopt.count, 457 sizeof_field(struct hnae3_tc_info, tqp_count)); 458 memcpy(tc_info->tqp_offset, mqprio_qopt->qopt.offset, 459 sizeof_field(struct hnae3_tc_info, tqp_offset)); 460 } 461 462 static int hclge_config_tc(struct hclge_dev *hdev, 463 struct hnae3_tc_info *tc_info) 464 { 465 int i; 466 467 hclge_tm_schd_info_update(hdev, tc_info->num_tc); 468 for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) 469 hdev->tm_info.prio_tc[i] = tc_info->prio_tc[i]; 470 471 return hclge_map_update(hdev); 472 } 473 474 /* Set up TC for hardware offloaded mqprio in channel mode */ 475 static int hclge_setup_tc(struct hnae3_handle *h, 476 struct tc_mqprio_qopt_offload *mqprio_qopt) 477 { 478 struct hclge_vport *vport = hclge_get_vport(h); 479 struct hnae3_knic_private_info *kinfo; 480 struct hclge_dev *hdev = vport->back; 481 struct hnae3_tc_info old_tc_info; 482 u8 tc = mqprio_qopt->qopt.num_tc; 483 int ret; 484 485 /* if client unregistered, it's not allowed to change 486 * mqprio configuration, which may cause uninit ring 487 * fail. 488 */ 489 if (!test_bit(HCLGE_STATE_NIC_REGISTERED, &hdev->state)) 490 return -EBUSY; 491 492 if (hdev->flag & HCLGE_FLAG_DCB_ENABLE) 493 return -EINVAL; 494 495 ret = hclge_mqprio_qopt_check(hdev, mqprio_qopt); 496 if (ret) { 497 dev_err(&hdev->pdev->dev, 498 "failed to check mqprio qopt params, ret = %d\n", ret); 499 return ret; 500 } 501 502 ret = hclge_notify_down_uinit(hdev); 503 if (ret) 504 return ret; 505 506 kinfo = &vport->nic.kinfo; 507 memcpy(&old_tc_info, &kinfo->tc_info, sizeof(old_tc_info)); 508 hclge_sync_mqprio_qopt(&kinfo->tc_info, mqprio_qopt); 509 kinfo->tc_info.mqprio_active = tc > 0; 510 511 ret = hclge_config_tc(hdev, &kinfo->tc_info); 512 if (ret) 513 goto err_out; 514 515 hdev->flag &= ~HCLGE_FLAG_DCB_ENABLE; 516 517 if (tc > 1) 518 hdev->flag |= HCLGE_FLAG_MQPRIO_ENABLE; 519 else 520 hdev->flag &= ~HCLGE_FLAG_MQPRIO_ENABLE; 521 522 return hclge_notify_init_up(hdev); 523 524 err_out: 525 if (!tc) { 526 dev_warn(&hdev->pdev->dev, 527 "failed to destroy mqprio, will active after reset, ret = %d\n", 528 ret); 529 } else { 530 /* roll-back */ 531 memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info)); 532 if (hclge_config_tc(hdev, &kinfo->tc_info)) 533 dev_err(&hdev->pdev->dev, 534 "failed to roll back tc configuration\n"); 535 } 536 hclge_notify_init_up(hdev); 537 538 return ret; 539 } 540 541 static const struct hnae3_dcb_ops hns3_dcb_ops = { 542 .ieee_getets = hclge_ieee_getets, 543 .ieee_setets = hclge_ieee_setets, 544 .ieee_getpfc = hclge_ieee_getpfc, 545 .ieee_setpfc = hclge_ieee_setpfc, 546 .getdcbx = hclge_getdcbx, 547 .setdcbx = hclge_setdcbx, 548 .setup_tc = hclge_setup_tc, 549 }; 550 551 void hclge_dcb_ops_set(struct hclge_dev *hdev) 552 { 553 struct hclge_vport *vport = hdev->vport; 554 struct hnae3_knic_private_info *kinfo; 555 556 /* Hdev does not support DCB or vport is 557 * not a pf, then dcb_ops is not set. 558 */ 559 if (!hnae3_dev_dcb_supported(hdev) || 560 vport->vport_id != 0) 561 return; 562 563 kinfo = &vport->nic.kinfo; 564 kinfo->dcb_ops = &hns3_dcb_ops; 565 hdev->dcbx_cap = DCB_CAP_DCBX_VER_IEEE | DCB_CAP_DCBX_HOST; 566 } 567