1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 1999 - 2018 Intel Corporation. */ 3 4 #include "ixgbe.h" 5 #include "ixgbe_sriov.h" 6 7 #ifdef CONFIG_IXGBE_DCB 8 /** 9 * ixgbe_cache_ring_dcb_sriov - Descriptor ring to register mapping for SR-IOV 10 * @adapter: board private structure to initialize 11 * 12 * Cache the descriptor ring offsets for SR-IOV to the assigned rings. It 13 * will also try to cache the proper offsets if RSS/FCoE are enabled along 14 * with VMDq. 15 * 16 **/ 17 static bool ixgbe_cache_ring_dcb_sriov(struct ixgbe_adapter *adapter) 18 { 19 #ifdef IXGBE_FCOE 20 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; 21 #endif /* IXGBE_FCOE */ 22 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ]; 23 int i; 24 u16 reg_idx, pool; 25 u8 tcs = adapter->hw_tcs; 26 27 /* verify we have DCB queueing enabled before proceeding */ 28 if (tcs <= 1) 29 return false; 30 31 /* verify we have VMDq enabled before proceeding */ 32 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 33 return false; 34 35 /* start at VMDq register offset for SR-IOV enabled setups */ 36 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 37 for (i = 0, pool = 0; i < adapter->num_rx_queues; i++, reg_idx++) { 38 /* If we are greater than indices move to next pool */ 39 if ((reg_idx & ~vmdq->mask) >= tcs) { 40 pool++; 41 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 42 } 43 adapter->rx_ring[i]->reg_idx = reg_idx; 44 adapter->rx_ring[i]->netdev = pool ? NULL : adapter->netdev; 45 } 46 47 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 48 for (i = 0; i < adapter->num_tx_queues; i++, reg_idx++) { 49 /* If we are greater than indices move to next pool */ 50 if ((reg_idx & ~vmdq->mask) >= tcs) 51 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 52 adapter->tx_ring[i]->reg_idx = reg_idx; 53 } 54 55 #ifdef IXGBE_FCOE 56 /* nothing to do if FCoE is disabled */ 57 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) 58 return true; 59 60 /* The work is already done if the FCoE ring is shared */ 61 if (fcoe->offset < tcs) 62 return true; 63 64 /* The FCoE rings exist separately, we need to move their reg_idx */ 65 if (fcoe->indices) { 66 u16 queues_per_pool = __ALIGN_MASK(1, ~vmdq->mask); 67 u8 fcoe_tc = ixgbe_fcoe_get_tc(adapter); 68 69 reg_idx = (vmdq->offset + vmdq->indices) * queues_per_pool; 70 for (i = fcoe->offset; i < adapter->num_rx_queues; i++) { 71 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask) + fcoe_tc; 72 adapter->rx_ring[i]->reg_idx = reg_idx; 73 adapter->rx_ring[i]->netdev = adapter->netdev; 74 reg_idx++; 75 } 76 77 reg_idx = (vmdq->offset + vmdq->indices) * queues_per_pool; 78 for (i = fcoe->offset; i < adapter->num_tx_queues; i++) { 79 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask) + fcoe_tc; 80 adapter->tx_ring[i]->reg_idx = reg_idx; 81 reg_idx++; 82 } 83 } 84 85 #endif /* IXGBE_FCOE */ 86 return true; 87 } 88 89 /* ixgbe_get_first_reg_idx - Return first register index associated with ring */ 90 static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc, 91 unsigned int *tx, unsigned int *rx) 92 { 93 struct ixgbe_hw *hw = &adapter->hw; 94 u8 num_tcs = adapter->hw_tcs; 95 96 *tx = 0; 97 *rx = 0; 98 99 switch (hw->mac.type) { 100 case ixgbe_mac_82598EB: 101 /* TxQs/TC: 4 RxQs/TC: 8 */ 102 *tx = tc << 2; /* 0, 4, 8, 12, 16, 20, 24, 28 */ 103 *rx = tc << 3; /* 0, 8, 16, 24, 32, 40, 48, 56 */ 104 break; 105 case ixgbe_mac_82599EB: 106 case ixgbe_mac_X540: 107 case ixgbe_mac_X550: 108 case ixgbe_mac_X550EM_x: 109 case ixgbe_mac_x550em_a: 110 if (num_tcs > 4) { 111 /* 112 * TCs : TC0/1 TC2/3 TC4-7 113 * TxQs/TC: 32 16 8 114 * RxQs/TC: 16 16 16 115 */ 116 *rx = tc << 4; 117 if (tc < 3) 118 *tx = tc << 5; /* 0, 32, 64 */ 119 else if (tc < 5) 120 *tx = (tc + 2) << 4; /* 80, 96 */ 121 else 122 *tx = (tc + 8) << 3; /* 104, 112, 120 */ 123 } else { 124 /* 125 * TCs : TC0 TC1 TC2/3 126 * TxQs/TC: 64 32 16 127 * RxQs/TC: 32 32 32 128 */ 129 *rx = tc << 5; 130 if (tc < 2) 131 *tx = tc << 6; /* 0, 64 */ 132 else 133 *tx = (tc + 4) << 4; /* 96, 112 */ 134 } 135 default: 136 break; 137 } 138 } 139 140 /** 141 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB 142 * @adapter: board private structure to initialize 143 * 144 * Cache the descriptor ring offsets for DCB to the assigned rings. 145 * 146 **/ 147 static bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter) 148 { 149 u8 num_tcs = adapter->hw_tcs; 150 unsigned int tx_idx, rx_idx; 151 int tc, offset, rss_i, i; 152 153 /* verify we have DCB queueing enabled before proceeding */ 154 if (num_tcs <= 1) 155 return false; 156 157 rss_i = adapter->ring_feature[RING_F_RSS].indices; 158 159 for (tc = 0, offset = 0; tc < num_tcs; tc++, offset += rss_i) { 160 ixgbe_get_first_reg_idx(adapter, tc, &tx_idx, &rx_idx); 161 for (i = 0; i < rss_i; i++, tx_idx++, rx_idx++) { 162 adapter->tx_ring[offset + i]->reg_idx = tx_idx; 163 adapter->rx_ring[offset + i]->reg_idx = rx_idx; 164 adapter->rx_ring[offset + i]->netdev = adapter->netdev; 165 adapter->tx_ring[offset + i]->dcb_tc = tc; 166 adapter->rx_ring[offset + i]->dcb_tc = tc; 167 } 168 } 169 170 return true; 171 } 172 173 #endif 174 /** 175 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov 176 * @adapter: board private structure to initialize 177 * 178 * SR-IOV doesn't use any descriptor rings but changes the default if 179 * no other mapping is used. 180 * 181 */ 182 static bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter) 183 { 184 #ifdef IXGBE_FCOE 185 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; 186 #endif /* IXGBE_FCOE */ 187 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ]; 188 struct ixgbe_ring_feature *rss = &adapter->ring_feature[RING_F_RSS]; 189 u16 reg_idx, pool; 190 int i; 191 192 /* only proceed if VMDq is enabled */ 193 if (!(adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)) 194 return false; 195 196 /* start at VMDq register offset for SR-IOV enabled setups */ 197 pool = 0; 198 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 199 for (i = 0; i < adapter->num_rx_queues; i++, reg_idx++) { 200 #ifdef IXGBE_FCOE 201 /* Allow first FCoE queue to be mapped as RSS */ 202 if (fcoe->offset && (i > fcoe->offset)) 203 break; 204 #endif 205 /* If we are greater than indices move to next pool */ 206 if ((reg_idx & ~vmdq->mask) >= rss->indices) { 207 pool++; 208 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 209 } 210 adapter->rx_ring[i]->reg_idx = reg_idx; 211 adapter->rx_ring[i]->netdev = pool ? NULL : adapter->netdev; 212 } 213 214 #ifdef IXGBE_FCOE 215 /* FCoE uses a linear block of queues so just assigning 1:1 */ 216 for (; i < adapter->num_rx_queues; i++, reg_idx++) { 217 adapter->rx_ring[i]->reg_idx = reg_idx; 218 adapter->rx_ring[i]->netdev = adapter->netdev; 219 } 220 221 #endif 222 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 223 for (i = 0; i < adapter->num_tx_queues; i++, reg_idx++) { 224 #ifdef IXGBE_FCOE 225 /* Allow first FCoE queue to be mapped as RSS */ 226 if (fcoe->offset && (i > fcoe->offset)) 227 break; 228 #endif 229 /* If we are greater than indices move to next pool */ 230 if ((reg_idx & rss->mask) >= rss->indices) 231 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 232 adapter->tx_ring[i]->reg_idx = reg_idx; 233 } 234 235 #ifdef IXGBE_FCOE 236 /* FCoE uses a linear block of queues so just assigning 1:1 */ 237 for (; i < adapter->num_tx_queues; i++, reg_idx++) 238 adapter->tx_ring[i]->reg_idx = reg_idx; 239 240 #endif 241 242 return true; 243 } 244 245 /** 246 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS 247 * @adapter: board private structure to initialize 248 * 249 * Cache the descriptor ring offsets for RSS to the assigned rings. 250 * 251 **/ 252 static bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter) 253 { 254 int i, reg_idx; 255 256 for (i = 0; i < adapter->num_rx_queues; i++) { 257 adapter->rx_ring[i]->reg_idx = i; 258 adapter->rx_ring[i]->netdev = adapter->netdev; 259 } 260 for (i = 0, reg_idx = 0; i < adapter->num_tx_queues; i++, reg_idx++) 261 adapter->tx_ring[i]->reg_idx = reg_idx; 262 for (i = 0; i < adapter->num_xdp_queues; i++, reg_idx++) 263 adapter->xdp_ring[i]->reg_idx = reg_idx; 264 265 return true; 266 } 267 268 /** 269 * ixgbe_cache_ring_register - Descriptor ring to register mapping 270 * @adapter: board private structure to initialize 271 * 272 * Once we know the feature-set enabled for the device, we'll cache 273 * the register offset the descriptor ring is assigned to. 274 * 275 * Note, the order the various feature calls is important. It must start with 276 * the "most" features enabled at the same time, then trickle down to the 277 * least amount of features turned on at once. 278 **/ 279 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter) 280 { 281 /* start with default case */ 282 adapter->rx_ring[0]->reg_idx = 0; 283 adapter->tx_ring[0]->reg_idx = 0; 284 285 #ifdef CONFIG_IXGBE_DCB 286 if (ixgbe_cache_ring_dcb_sriov(adapter)) 287 return; 288 289 if (ixgbe_cache_ring_dcb(adapter)) 290 return; 291 292 #endif 293 if (ixgbe_cache_ring_sriov(adapter)) 294 return; 295 296 ixgbe_cache_ring_rss(adapter); 297 } 298 299 static int ixgbe_xdp_queues(struct ixgbe_adapter *adapter) 300 { 301 return adapter->xdp_prog ? nr_cpu_ids : 0; 302 } 303 304 #define IXGBE_RSS_64Q_MASK 0x3F 305 #define IXGBE_RSS_16Q_MASK 0xF 306 #define IXGBE_RSS_8Q_MASK 0x7 307 #define IXGBE_RSS_4Q_MASK 0x3 308 #define IXGBE_RSS_2Q_MASK 0x1 309 #define IXGBE_RSS_DISABLED_MASK 0x0 310 311 #ifdef CONFIG_IXGBE_DCB 312 /** 313 * ixgbe_set_dcb_sriov_queues: Allocate queues for SR-IOV devices w/ DCB 314 * @adapter: board private structure to initialize 315 * 316 * When SR-IOV (Single Root IO Virtualiztion) is enabled, allocate queues 317 * and VM pools where appropriate. Also assign queues based on DCB 318 * priorities and map accordingly.. 319 * 320 **/ 321 static bool ixgbe_set_dcb_sriov_queues(struct ixgbe_adapter *adapter) 322 { 323 int i; 324 u16 vmdq_i = adapter->ring_feature[RING_F_VMDQ].limit; 325 u16 vmdq_m = 0; 326 #ifdef IXGBE_FCOE 327 u16 fcoe_i = 0; 328 #endif 329 u8 tcs = adapter->hw_tcs; 330 331 /* verify we have DCB queueing enabled before proceeding */ 332 if (tcs <= 1) 333 return false; 334 335 /* verify we have VMDq enabled before proceeding */ 336 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 337 return false; 338 339 /* limit VMDq instances on the PF by number of Tx queues */ 340 vmdq_i = min_t(u16, vmdq_i, MAX_TX_QUEUES / tcs); 341 342 /* Add starting offset to total pool count */ 343 vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset; 344 345 /* 16 pools w/ 8 TC per pool */ 346 if (tcs > 4) { 347 vmdq_i = min_t(u16, vmdq_i, 16); 348 vmdq_m = IXGBE_82599_VMDQ_8Q_MASK; 349 /* 32 pools w/ 4 TC per pool */ 350 } else { 351 vmdq_i = min_t(u16, vmdq_i, 32); 352 vmdq_m = IXGBE_82599_VMDQ_4Q_MASK; 353 } 354 355 #ifdef IXGBE_FCOE 356 /* queues in the remaining pools are available for FCoE */ 357 fcoe_i = (128 / __ALIGN_MASK(1, ~vmdq_m)) - vmdq_i; 358 359 #endif 360 /* remove the starting offset from the pool count */ 361 vmdq_i -= adapter->ring_feature[RING_F_VMDQ].offset; 362 363 /* save features for later use */ 364 adapter->ring_feature[RING_F_VMDQ].indices = vmdq_i; 365 adapter->ring_feature[RING_F_VMDQ].mask = vmdq_m; 366 367 /* 368 * We do not support DCB, VMDq, and RSS all simultaneously 369 * so we will disable RSS since it is the lowest priority 370 */ 371 adapter->ring_feature[RING_F_RSS].indices = 1; 372 adapter->ring_feature[RING_F_RSS].mask = IXGBE_RSS_DISABLED_MASK; 373 374 /* disable ATR as it is not supported when VMDq is enabled */ 375 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 376 377 adapter->num_rx_pools = vmdq_i; 378 adapter->num_rx_queues_per_pool = tcs; 379 380 adapter->num_tx_queues = vmdq_i * tcs; 381 adapter->num_xdp_queues = 0; 382 adapter->num_rx_queues = vmdq_i * tcs; 383 384 #ifdef IXGBE_FCOE 385 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 386 struct ixgbe_ring_feature *fcoe; 387 388 fcoe = &adapter->ring_feature[RING_F_FCOE]; 389 390 /* limit ourselves based on feature limits */ 391 fcoe_i = min_t(u16, fcoe_i, fcoe->limit); 392 393 if (fcoe_i) { 394 /* alloc queues for FCoE separately */ 395 fcoe->indices = fcoe_i; 396 fcoe->offset = vmdq_i * tcs; 397 398 /* add queues to adapter */ 399 adapter->num_tx_queues += fcoe_i; 400 adapter->num_rx_queues += fcoe_i; 401 } else if (tcs > 1) { 402 /* use queue belonging to FcoE TC */ 403 fcoe->indices = 1; 404 fcoe->offset = ixgbe_fcoe_get_tc(adapter); 405 } else { 406 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; 407 408 fcoe->indices = 0; 409 fcoe->offset = 0; 410 } 411 } 412 413 #endif /* IXGBE_FCOE */ 414 /* configure TC to queue mapping */ 415 for (i = 0; i < tcs; i++) 416 netdev_set_tc_queue(adapter->netdev, i, 1, i); 417 418 return true; 419 } 420 421 static bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter) 422 { 423 struct net_device *dev = adapter->netdev; 424 struct ixgbe_ring_feature *f; 425 int rss_i, rss_m, i; 426 int tcs; 427 428 /* Map queue offset and counts onto allocated tx queues */ 429 tcs = adapter->hw_tcs; 430 431 /* verify we have DCB queueing enabled before proceeding */ 432 if (tcs <= 1) 433 return false; 434 435 /* determine the upper limit for our current DCB mode */ 436 rss_i = dev->num_tx_queues / tcs; 437 if (adapter->hw.mac.type == ixgbe_mac_82598EB) { 438 /* 8 TC w/ 4 queues per TC */ 439 rss_i = min_t(u16, rss_i, 4); 440 rss_m = IXGBE_RSS_4Q_MASK; 441 } else if (tcs > 4) { 442 /* 8 TC w/ 8 queues per TC */ 443 rss_i = min_t(u16, rss_i, 8); 444 rss_m = IXGBE_RSS_8Q_MASK; 445 } else { 446 /* 4 TC w/ 16 queues per TC */ 447 rss_i = min_t(u16, rss_i, 16); 448 rss_m = IXGBE_RSS_16Q_MASK; 449 } 450 451 /* set RSS mask and indices */ 452 f = &adapter->ring_feature[RING_F_RSS]; 453 rss_i = min_t(int, rss_i, f->limit); 454 f->indices = rss_i; 455 f->mask = rss_m; 456 457 /* disable ATR as it is not supported when multiple TCs are enabled */ 458 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 459 460 #ifdef IXGBE_FCOE 461 /* FCoE enabled queues require special configuration indexed 462 * by feature specific indices and offset. Here we map FCoE 463 * indices onto the DCB queue pairs allowing FCoE to own 464 * configuration later. 465 */ 466 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 467 u8 tc = ixgbe_fcoe_get_tc(adapter); 468 469 f = &adapter->ring_feature[RING_F_FCOE]; 470 f->indices = min_t(u16, rss_i, f->limit); 471 f->offset = rss_i * tc; 472 } 473 474 #endif /* IXGBE_FCOE */ 475 for (i = 0; i < tcs; i++) 476 netdev_set_tc_queue(dev, i, rss_i, rss_i * i); 477 478 adapter->num_tx_queues = rss_i * tcs; 479 adapter->num_xdp_queues = 0; 480 adapter->num_rx_queues = rss_i * tcs; 481 482 return true; 483 } 484 485 #endif 486 /** 487 * ixgbe_set_sriov_queues - Allocate queues for SR-IOV devices 488 * @adapter: board private structure to initialize 489 * 490 * When SR-IOV (Single Root IO Virtualiztion) is enabled, allocate queues 491 * and VM pools where appropriate. If RSS is available, then also try and 492 * enable RSS and map accordingly. 493 * 494 **/ 495 static bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter) 496 { 497 u16 vmdq_i = adapter->ring_feature[RING_F_VMDQ].limit; 498 u16 vmdq_m = 0; 499 u16 rss_i = adapter->ring_feature[RING_F_RSS].limit; 500 u16 rss_m = IXGBE_RSS_DISABLED_MASK; 501 #ifdef IXGBE_FCOE 502 u16 fcoe_i = 0; 503 #endif 504 505 /* only proceed if SR-IOV is enabled */ 506 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 507 return false; 508 509 /* limit l2fwd RSS based on total Tx queue limit */ 510 rss_i = min_t(u16, rss_i, MAX_TX_QUEUES / vmdq_i); 511 512 /* Add starting offset to total pool count */ 513 vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset; 514 515 /* double check we are limited to maximum pools */ 516 vmdq_i = min_t(u16, IXGBE_MAX_VMDQ_INDICES, vmdq_i); 517 518 /* 64 pool mode with 2 queues per pool */ 519 if (vmdq_i > 32) { 520 vmdq_m = IXGBE_82599_VMDQ_2Q_MASK; 521 rss_m = IXGBE_RSS_2Q_MASK; 522 rss_i = min_t(u16, rss_i, 2); 523 /* 32 pool mode with up to 4 queues per pool */ 524 } else { 525 vmdq_m = IXGBE_82599_VMDQ_4Q_MASK; 526 rss_m = IXGBE_RSS_4Q_MASK; 527 /* We can support 4, 2, or 1 queues */ 528 rss_i = (rss_i > 3) ? 4 : (rss_i > 1) ? 2 : 1; 529 } 530 531 #ifdef IXGBE_FCOE 532 /* queues in the remaining pools are available for FCoE */ 533 fcoe_i = 128 - (vmdq_i * __ALIGN_MASK(1, ~vmdq_m)); 534 535 #endif 536 /* remove the starting offset from the pool count */ 537 vmdq_i -= adapter->ring_feature[RING_F_VMDQ].offset; 538 539 /* save features for later use */ 540 adapter->ring_feature[RING_F_VMDQ].indices = vmdq_i; 541 adapter->ring_feature[RING_F_VMDQ].mask = vmdq_m; 542 543 /* limit RSS based on user input and save for later use */ 544 adapter->ring_feature[RING_F_RSS].indices = rss_i; 545 adapter->ring_feature[RING_F_RSS].mask = rss_m; 546 547 adapter->num_rx_pools = vmdq_i; 548 adapter->num_rx_queues_per_pool = rss_i; 549 550 adapter->num_rx_queues = vmdq_i * rss_i; 551 adapter->num_tx_queues = vmdq_i * rss_i; 552 adapter->num_xdp_queues = 0; 553 554 /* disable ATR as it is not supported when VMDq is enabled */ 555 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 556 557 #ifdef IXGBE_FCOE 558 /* 559 * FCoE can use rings from adjacent buffers to allow RSS 560 * like behavior. To account for this we need to add the 561 * FCoE indices to the total ring count. 562 */ 563 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 564 struct ixgbe_ring_feature *fcoe; 565 566 fcoe = &adapter->ring_feature[RING_F_FCOE]; 567 568 /* limit ourselves based on feature limits */ 569 fcoe_i = min_t(u16, fcoe_i, fcoe->limit); 570 571 if (vmdq_i > 1 && fcoe_i) { 572 /* alloc queues for FCoE separately */ 573 fcoe->indices = fcoe_i; 574 fcoe->offset = vmdq_i * rss_i; 575 } else { 576 /* merge FCoE queues with RSS queues */ 577 fcoe_i = min_t(u16, fcoe_i + rss_i, num_online_cpus()); 578 579 /* limit indices to rss_i if MSI-X is disabled */ 580 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 581 fcoe_i = rss_i; 582 583 /* attempt to reserve some queues for just FCoE */ 584 fcoe->indices = min_t(u16, fcoe_i, fcoe->limit); 585 fcoe->offset = fcoe_i - fcoe->indices; 586 587 fcoe_i -= rss_i; 588 } 589 590 /* add queues to adapter */ 591 adapter->num_tx_queues += fcoe_i; 592 adapter->num_rx_queues += fcoe_i; 593 } 594 595 #endif 596 /* To support macvlan offload we have to use num_tc to 597 * restrict the queues that can be used by the device. 598 * By doing this we can avoid reporting a false number of 599 * queues. 600 */ 601 if (vmdq_i > 1) 602 netdev_set_num_tc(adapter->netdev, 1); 603 604 /* populate TC0 for use by pool 0 */ 605 netdev_set_tc_queue(adapter->netdev, 0, 606 adapter->num_rx_queues_per_pool, 0); 607 608 return true; 609 } 610 611 /** 612 * ixgbe_set_rss_queues - Allocate queues for RSS 613 * @adapter: board private structure to initialize 614 * 615 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try 616 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU. 617 * 618 **/ 619 static bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter) 620 { 621 struct ixgbe_hw *hw = &adapter->hw; 622 struct ixgbe_ring_feature *f; 623 u16 rss_i; 624 625 /* set mask for 16 queue limit of RSS */ 626 f = &adapter->ring_feature[RING_F_RSS]; 627 rss_i = f->limit; 628 629 f->indices = rss_i; 630 631 if (hw->mac.type < ixgbe_mac_X550) 632 f->mask = IXGBE_RSS_16Q_MASK; 633 else 634 f->mask = IXGBE_RSS_64Q_MASK; 635 636 /* disable ATR by default, it will be configured below */ 637 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 638 639 /* 640 * Use Flow Director in addition to RSS to ensure the best 641 * distribution of flows across cores, even when an FDIR flow 642 * isn't matched. 643 */ 644 if (rss_i > 1 && adapter->atr_sample_rate) { 645 f = &adapter->ring_feature[RING_F_FDIR]; 646 647 rss_i = f->indices = f->limit; 648 649 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) 650 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; 651 } 652 653 #ifdef IXGBE_FCOE 654 /* 655 * FCoE can exist on the same rings as standard network traffic 656 * however it is preferred to avoid that if possible. In order 657 * to get the best performance we allocate as many FCoE queues 658 * as we can and we place them at the end of the ring array to 659 * avoid sharing queues with standard RSS on systems with 24 or 660 * more CPUs. 661 */ 662 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 663 struct net_device *dev = adapter->netdev; 664 u16 fcoe_i; 665 666 f = &adapter->ring_feature[RING_F_FCOE]; 667 668 /* merge FCoE queues with RSS queues */ 669 fcoe_i = min_t(u16, f->limit + rss_i, num_online_cpus()); 670 fcoe_i = min_t(u16, fcoe_i, dev->num_tx_queues); 671 672 /* limit indices to rss_i if MSI-X is disabled */ 673 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 674 fcoe_i = rss_i; 675 676 /* attempt to reserve some queues for just FCoE */ 677 f->indices = min_t(u16, fcoe_i, f->limit); 678 f->offset = fcoe_i - f->indices; 679 rss_i = max_t(u16, fcoe_i, rss_i); 680 } 681 682 #endif /* IXGBE_FCOE */ 683 adapter->num_rx_queues = rss_i; 684 adapter->num_tx_queues = rss_i; 685 adapter->num_xdp_queues = ixgbe_xdp_queues(adapter); 686 687 return true; 688 } 689 690 /** 691 * ixgbe_set_num_queues - Allocate queues for device, feature dependent 692 * @adapter: board private structure to initialize 693 * 694 * This is the top level queue allocation routine. The order here is very 695 * important, starting with the "most" number of features turned on at once, 696 * and ending with the smallest set of features. This way large combinations 697 * can be allocated if they're turned on, and smaller combinations are the 698 * fallthrough conditions. 699 * 700 **/ 701 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter) 702 { 703 /* Start with base case */ 704 adapter->num_rx_queues = 1; 705 adapter->num_tx_queues = 1; 706 adapter->num_xdp_queues = 0; 707 adapter->num_rx_pools = 1; 708 adapter->num_rx_queues_per_pool = 1; 709 710 #ifdef CONFIG_IXGBE_DCB 711 if (ixgbe_set_dcb_sriov_queues(adapter)) 712 return; 713 714 if (ixgbe_set_dcb_queues(adapter)) 715 return; 716 717 #endif 718 if (ixgbe_set_sriov_queues(adapter)) 719 return; 720 721 ixgbe_set_rss_queues(adapter); 722 } 723 724 /** 725 * ixgbe_acquire_msix_vectors - acquire MSI-X vectors 726 * @adapter: board private structure 727 * 728 * Attempts to acquire a suitable range of MSI-X vector interrupts. Will 729 * return a negative error code if unable to acquire MSI-X vectors for any 730 * reason. 731 */ 732 static int ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter) 733 { 734 struct ixgbe_hw *hw = &adapter->hw; 735 int i, vectors, vector_threshold; 736 737 /* We start by asking for one vector per queue pair with XDP queues 738 * being stacked with TX queues. 739 */ 740 vectors = max(adapter->num_rx_queues, adapter->num_tx_queues); 741 vectors = max(vectors, adapter->num_xdp_queues); 742 743 /* It is easy to be greedy for MSI-X vectors. However, it really 744 * doesn't do much good if we have a lot more vectors than CPUs. We'll 745 * be somewhat conservative and only ask for (roughly) the same number 746 * of vectors as there are CPUs. 747 */ 748 vectors = min_t(int, vectors, num_online_cpus()); 749 750 /* Some vectors are necessary for non-queue interrupts */ 751 vectors += NON_Q_VECTORS; 752 753 /* Hardware can only support a maximum of hw.mac->max_msix_vectors. 754 * With features such as RSS and VMDq, we can easily surpass the 755 * number of Rx and Tx descriptor queues supported by our device. 756 * Thus, we cap the maximum in the rare cases where the CPU count also 757 * exceeds our vector limit 758 */ 759 vectors = min_t(int, vectors, hw->mac.max_msix_vectors); 760 761 /* We want a minimum of two MSI-X vectors for (1) a TxQ[0] + RxQ[0] 762 * handler, and (2) an Other (Link Status Change, etc.) handler. 763 */ 764 vector_threshold = MIN_MSIX_COUNT; 765 766 adapter->msix_entries = kcalloc(vectors, 767 sizeof(struct msix_entry), 768 GFP_KERNEL); 769 if (!adapter->msix_entries) 770 return -ENOMEM; 771 772 for (i = 0; i < vectors; i++) 773 adapter->msix_entries[i].entry = i; 774 775 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries, 776 vector_threshold, vectors); 777 778 if (vectors < 0) { 779 /* A negative count of allocated vectors indicates an error in 780 * acquiring within the specified range of MSI-X vectors 781 */ 782 e_dev_warn("Failed to allocate MSI-X interrupts. Err: %d\n", 783 vectors); 784 785 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; 786 kfree(adapter->msix_entries); 787 adapter->msix_entries = NULL; 788 789 return vectors; 790 } 791 792 /* we successfully allocated some number of vectors within our 793 * requested range. 794 */ 795 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; 796 797 /* Adjust for only the vectors we'll use, which is minimum 798 * of max_q_vectors, or the number of vectors we were allocated. 799 */ 800 vectors -= NON_Q_VECTORS; 801 adapter->num_q_vectors = min_t(int, vectors, adapter->max_q_vectors); 802 803 return 0; 804 } 805 806 static void ixgbe_add_ring(struct ixgbe_ring *ring, 807 struct ixgbe_ring_container *head) 808 { 809 ring->next = head->ring; 810 head->ring = ring; 811 head->count++; 812 head->next_update = jiffies + 1; 813 } 814 815 /** 816 * ixgbe_alloc_q_vector - Allocate memory for a single interrupt vector 817 * @adapter: board private structure to initialize 818 * @v_count: q_vectors allocated on adapter, used for ring interleaving 819 * @v_idx: index of vector in adapter struct 820 * @txr_count: total number of Tx rings to allocate 821 * @txr_idx: index of first Tx ring to allocate 822 * @xdp_count: total number of XDP rings to allocate 823 * @xdp_idx: index of first XDP ring to allocate 824 * @rxr_count: total number of Rx rings to allocate 825 * @rxr_idx: index of first Rx ring to allocate 826 * 827 * We allocate one q_vector. If allocation fails we return -ENOMEM. 828 **/ 829 static int ixgbe_alloc_q_vector(struct ixgbe_adapter *adapter, 830 int v_count, int v_idx, 831 int txr_count, int txr_idx, 832 int xdp_count, int xdp_idx, 833 int rxr_count, int rxr_idx) 834 { 835 int node = dev_to_node(&adapter->pdev->dev); 836 struct ixgbe_q_vector *q_vector; 837 struct ixgbe_ring *ring; 838 int cpu = -1; 839 int ring_count; 840 u8 tcs = adapter->hw_tcs; 841 842 ring_count = txr_count + rxr_count + xdp_count; 843 844 /* customize cpu for Flow Director mapping */ 845 if ((tcs <= 1) && !(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) { 846 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices; 847 if (rss_i > 1 && adapter->atr_sample_rate) { 848 cpu = cpumask_local_spread(v_idx, node); 849 node = cpu_to_node(cpu); 850 } 851 } 852 853 /* allocate q_vector and rings */ 854 q_vector = kzalloc_node(struct_size(q_vector, ring, ring_count), 855 GFP_KERNEL, node); 856 if (!q_vector) 857 q_vector = kzalloc(struct_size(q_vector, ring, ring_count), 858 GFP_KERNEL); 859 if (!q_vector) 860 return -ENOMEM; 861 862 /* setup affinity mask and node */ 863 if (cpu != -1) 864 cpumask_set_cpu(cpu, &q_vector->affinity_mask); 865 q_vector->numa_node = node; 866 867 #ifdef CONFIG_IXGBE_DCA 868 /* initialize CPU for DCA */ 869 q_vector->cpu = -1; 870 871 #endif 872 /* initialize NAPI */ 873 netif_napi_add(adapter->netdev, &q_vector->napi, 874 ixgbe_poll, 64); 875 876 /* tie q_vector and adapter together */ 877 adapter->q_vector[v_idx] = q_vector; 878 q_vector->adapter = adapter; 879 q_vector->v_idx = v_idx; 880 881 /* initialize work limits */ 882 q_vector->tx.work_limit = adapter->tx_work_limit; 883 884 /* Initialize setting for adaptive ITR */ 885 q_vector->tx.itr = IXGBE_ITR_ADAPTIVE_MAX_USECS | 886 IXGBE_ITR_ADAPTIVE_LATENCY; 887 q_vector->rx.itr = IXGBE_ITR_ADAPTIVE_MAX_USECS | 888 IXGBE_ITR_ADAPTIVE_LATENCY; 889 890 /* intialize ITR */ 891 if (txr_count && !rxr_count) { 892 /* tx only vector */ 893 if (adapter->tx_itr_setting == 1) 894 q_vector->itr = IXGBE_12K_ITR; 895 else 896 q_vector->itr = adapter->tx_itr_setting; 897 } else { 898 /* rx or rx/tx vector */ 899 if (adapter->rx_itr_setting == 1) 900 q_vector->itr = IXGBE_20K_ITR; 901 else 902 q_vector->itr = adapter->rx_itr_setting; 903 } 904 905 /* initialize pointer to rings */ 906 ring = q_vector->ring; 907 908 while (txr_count) { 909 /* assign generic ring traits */ 910 ring->dev = &adapter->pdev->dev; 911 ring->netdev = adapter->netdev; 912 913 /* configure backlink on ring */ 914 ring->q_vector = q_vector; 915 916 /* update q_vector Tx values */ 917 ixgbe_add_ring(ring, &q_vector->tx); 918 919 /* apply Tx specific ring traits */ 920 ring->count = adapter->tx_ring_count; 921 ring->queue_index = txr_idx; 922 923 /* assign ring to adapter */ 924 WRITE_ONCE(adapter->tx_ring[txr_idx], ring); 925 926 /* update count and index */ 927 txr_count--; 928 txr_idx += v_count; 929 930 /* push pointer to next ring */ 931 ring++; 932 } 933 934 while (xdp_count) { 935 /* assign generic ring traits */ 936 ring->dev = &adapter->pdev->dev; 937 ring->netdev = adapter->netdev; 938 939 /* configure backlink on ring */ 940 ring->q_vector = q_vector; 941 942 /* update q_vector Tx values */ 943 ixgbe_add_ring(ring, &q_vector->tx); 944 945 /* apply Tx specific ring traits */ 946 ring->count = adapter->tx_ring_count; 947 ring->queue_index = xdp_idx; 948 set_ring_xdp(ring); 949 950 /* assign ring to adapter */ 951 WRITE_ONCE(adapter->xdp_ring[xdp_idx], ring); 952 953 /* update count and index */ 954 xdp_count--; 955 xdp_idx++; 956 957 /* push pointer to next ring */ 958 ring++; 959 } 960 961 while (rxr_count) { 962 /* assign generic ring traits */ 963 ring->dev = &adapter->pdev->dev; 964 ring->netdev = adapter->netdev; 965 966 /* configure backlink on ring */ 967 ring->q_vector = q_vector; 968 969 /* update q_vector Rx values */ 970 ixgbe_add_ring(ring, &q_vector->rx); 971 972 /* 973 * 82599 errata, UDP frames with a 0 checksum 974 * can be marked as checksum errors. 975 */ 976 if (adapter->hw.mac.type == ixgbe_mac_82599EB) 977 set_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state); 978 979 #ifdef IXGBE_FCOE 980 if (adapter->netdev->features & NETIF_F_FCOE_MTU) { 981 struct ixgbe_ring_feature *f; 982 f = &adapter->ring_feature[RING_F_FCOE]; 983 if ((rxr_idx >= f->offset) && 984 (rxr_idx < f->offset + f->indices)) 985 set_bit(__IXGBE_RX_FCOE, &ring->state); 986 } 987 988 #endif /* IXGBE_FCOE */ 989 /* apply Rx specific ring traits */ 990 ring->count = adapter->rx_ring_count; 991 ring->queue_index = rxr_idx; 992 993 /* assign ring to adapter */ 994 WRITE_ONCE(adapter->rx_ring[rxr_idx], ring); 995 996 /* update count and index */ 997 rxr_count--; 998 rxr_idx += v_count; 999 1000 /* push pointer to next ring */ 1001 ring++; 1002 } 1003 1004 return 0; 1005 } 1006 1007 /** 1008 * ixgbe_free_q_vector - Free memory allocated for specific interrupt vector 1009 * @adapter: board private structure to initialize 1010 * @v_idx: Index of vector to be freed 1011 * 1012 * This function frees the memory allocated to the q_vector. In addition if 1013 * NAPI is enabled it will delete any references to the NAPI struct prior 1014 * to freeing the q_vector. 1015 **/ 1016 static void ixgbe_free_q_vector(struct ixgbe_adapter *adapter, int v_idx) 1017 { 1018 struct ixgbe_q_vector *q_vector = adapter->q_vector[v_idx]; 1019 struct ixgbe_ring *ring; 1020 1021 ixgbe_for_each_ring(ring, q_vector->tx) { 1022 if (ring_is_xdp(ring)) 1023 WRITE_ONCE(adapter->xdp_ring[ring->queue_index], NULL); 1024 else 1025 WRITE_ONCE(adapter->tx_ring[ring->queue_index], NULL); 1026 } 1027 1028 ixgbe_for_each_ring(ring, q_vector->rx) 1029 WRITE_ONCE(adapter->rx_ring[ring->queue_index], NULL); 1030 1031 adapter->q_vector[v_idx] = NULL; 1032 napi_hash_del(&q_vector->napi); 1033 netif_napi_del(&q_vector->napi); 1034 1035 /* 1036 * ixgbe_get_stats64() might access the rings on this vector, 1037 * we must wait a grace period before freeing it. 1038 */ 1039 kfree_rcu(q_vector, rcu); 1040 } 1041 1042 /** 1043 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors 1044 * @adapter: board private structure to initialize 1045 * 1046 * We allocate one q_vector per queue interrupt. If allocation fails we 1047 * return -ENOMEM. 1048 **/ 1049 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter) 1050 { 1051 int q_vectors = adapter->num_q_vectors; 1052 int rxr_remaining = adapter->num_rx_queues; 1053 int txr_remaining = adapter->num_tx_queues; 1054 int xdp_remaining = adapter->num_xdp_queues; 1055 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0; 1056 int err, i; 1057 1058 /* only one q_vector if MSI-X is disabled. */ 1059 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 1060 q_vectors = 1; 1061 1062 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) { 1063 for (; rxr_remaining; v_idx++) { 1064 err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx, 1065 0, 0, 0, 0, 1, rxr_idx); 1066 1067 if (err) 1068 goto err_out; 1069 1070 /* update counts and index */ 1071 rxr_remaining--; 1072 rxr_idx++; 1073 } 1074 } 1075 1076 for (; v_idx < q_vectors; v_idx++) { 1077 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx); 1078 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx); 1079 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors - v_idx); 1080 1081 err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx, 1082 tqpv, txr_idx, 1083 xqpv, xdp_idx, 1084 rqpv, rxr_idx); 1085 1086 if (err) 1087 goto err_out; 1088 1089 /* update counts and index */ 1090 rxr_remaining -= rqpv; 1091 txr_remaining -= tqpv; 1092 xdp_remaining -= xqpv; 1093 rxr_idx++; 1094 txr_idx++; 1095 xdp_idx += xqpv; 1096 } 1097 1098 for (i = 0; i < adapter->num_rx_queues; i++) { 1099 if (adapter->rx_ring[i]) 1100 adapter->rx_ring[i]->ring_idx = i; 1101 } 1102 1103 for (i = 0; i < adapter->num_tx_queues; i++) { 1104 if (adapter->tx_ring[i]) 1105 adapter->tx_ring[i]->ring_idx = i; 1106 } 1107 1108 for (i = 0; i < adapter->num_xdp_queues; i++) { 1109 if (adapter->xdp_ring[i]) 1110 adapter->xdp_ring[i]->ring_idx = i; 1111 } 1112 1113 return 0; 1114 1115 err_out: 1116 adapter->num_tx_queues = 0; 1117 adapter->num_xdp_queues = 0; 1118 adapter->num_rx_queues = 0; 1119 adapter->num_q_vectors = 0; 1120 1121 while (v_idx--) 1122 ixgbe_free_q_vector(adapter, v_idx); 1123 1124 return -ENOMEM; 1125 } 1126 1127 /** 1128 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors 1129 * @adapter: board private structure to initialize 1130 * 1131 * This function frees the memory allocated to the q_vectors. In addition if 1132 * NAPI is enabled it will delete any references to the NAPI struct prior 1133 * to freeing the q_vector. 1134 **/ 1135 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter) 1136 { 1137 int v_idx = adapter->num_q_vectors; 1138 1139 adapter->num_tx_queues = 0; 1140 adapter->num_xdp_queues = 0; 1141 adapter->num_rx_queues = 0; 1142 adapter->num_q_vectors = 0; 1143 1144 while (v_idx--) 1145 ixgbe_free_q_vector(adapter, v_idx); 1146 } 1147 1148 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter) 1149 { 1150 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 1151 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; 1152 pci_disable_msix(adapter->pdev); 1153 kfree(adapter->msix_entries); 1154 adapter->msix_entries = NULL; 1155 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { 1156 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED; 1157 pci_disable_msi(adapter->pdev); 1158 } 1159 } 1160 1161 /** 1162 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported 1163 * @adapter: board private structure to initialize 1164 * 1165 * Attempt to configure the interrupts using the best available 1166 * capabilities of the hardware and the kernel. 1167 **/ 1168 static void ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter) 1169 { 1170 int err; 1171 1172 /* We will try to get MSI-X interrupts first */ 1173 if (!ixgbe_acquire_msix_vectors(adapter)) 1174 return; 1175 1176 /* At this point, we do not have MSI-X capabilities. We need to 1177 * reconfigure or disable various features which require MSI-X 1178 * capability. 1179 */ 1180 1181 /* Disable DCB unless we only have a single traffic class */ 1182 if (adapter->hw_tcs > 1) { 1183 e_dev_warn("Number of DCB TCs exceeds number of available queues. Disabling DCB support.\n"); 1184 netdev_reset_tc(adapter->netdev); 1185 1186 if (adapter->hw.mac.type == ixgbe_mac_82598EB) 1187 adapter->hw.fc.requested_mode = adapter->last_lfc_mode; 1188 1189 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED; 1190 adapter->temp_dcb_cfg.pfc_mode_enable = false; 1191 adapter->dcb_cfg.pfc_mode_enable = false; 1192 } 1193 1194 adapter->hw_tcs = 0; 1195 adapter->dcb_cfg.num_tcs.pg_tcs = 1; 1196 adapter->dcb_cfg.num_tcs.pfc_tcs = 1; 1197 1198 /* Disable SR-IOV support */ 1199 e_dev_warn("Disabling SR-IOV support\n"); 1200 ixgbe_disable_sriov(adapter); 1201 1202 /* Disable RSS */ 1203 e_dev_warn("Disabling RSS support\n"); 1204 adapter->ring_feature[RING_F_RSS].limit = 1; 1205 1206 /* recalculate number of queues now that many features have been 1207 * changed or disabled. 1208 */ 1209 ixgbe_set_num_queues(adapter); 1210 adapter->num_q_vectors = 1; 1211 1212 err = pci_enable_msi(adapter->pdev); 1213 if (err) 1214 e_dev_warn("Failed to allocate MSI interrupt, falling back to legacy. Error: %d\n", 1215 err); 1216 else 1217 adapter->flags |= IXGBE_FLAG_MSI_ENABLED; 1218 } 1219 1220 /** 1221 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme 1222 * @adapter: board private structure to initialize 1223 * 1224 * We determine which interrupt scheme to use based on... 1225 * - Kernel support (MSI, MSI-X) 1226 * - which can be user-defined (via MODULE_PARAM) 1227 * - Hardware queue count (num_*_queues) 1228 * - defined by miscellaneous hardware support/features (RSS, etc.) 1229 **/ 1230 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter) 1231 { 1232 int err; 1233 1234 /* Number of supported queues */ 1235 ixgbe_set_num_queues(adapter); 1236 1237 /* Set interrupt mode */ 1238 ixgbe_set_interrupt_capability(adapter); 1239 1240 err = ixgbe_alloc_q_vectors(adapter); 1241 if (err) { 1242 e_dev_err("Unable to allocate memory for queue vectors\n"); 1243 goto err_alloc_q_vectors; 1244 } 1245 1246 ixgbe_cache_ring_register(adapter); 1247 1248 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count = %u\n", 1249 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled", 1250 adapter->num_rx_queues, adapter->num_tx_queues, 1251 adapter->num_xdp_queues); 1252 1253 set_bit(__IXGBE_DOWN, &adapter->state); 1254 1255 return 0; 1256 1257 err_alloc_q_vectors: 1258 ixgbe_reset_interrupt_capability(adapter); 1259 return err; 1260 } 1261 1262 /** 1263 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings 1264 * @adapter: board private structure to clear interrupt scheme on 1265 * 1266 * We go through and clear interrupt specific resources and reset the structure 1267 * to pre-load conditions 1268 **/ 1269 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter) 1270 { 1271 adapter->num_tx_queues = 0; 1272 adapter->num_xdp_queues = 0; 1273 adapter->num_rx_queues = 0; 1274 1275 ixgbe_free_q_vectors(adapter); 1276 ixgbe_reset_interrupt_capability(adapter); 1277 } 1278 1279 void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens, 1280 u32 fceof_saidx, u32 type_tucmd, u32 mss_l4len_idx) 1281 { 1282 struct ixgbe_adv_tx_context_desc *context_desc; 1283 u16 i = tx_ring->next_to_use; 1284 1285 context_desc = IXGBE_TX_CTXTDESC(tx_ring, i); 1286 1287 i++; 1288 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 1289 1290 /* set bits to identify this as an advanced context descriptor */ 1291 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT; 1292 1293 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 1294 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx); 1295 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 1296 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 1297 } 1298 1299