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 break; 136 default: 137 break; 138 } 139 } 140 141 /** 142 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB 143 * @adapter: board private structure to initialize 144 * 145 * Cache the descriptor ring offsets for DCB to the assigned rings. 146 * 147 **/ 148 static bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter) 149 { 150 u8 num_tcs = adapter->hw_tcs; 151 unsigned int tx_idx, rx_idx; 152 int tc, offset, rss_i, i; 153 154 /* verify we have DCB queueing enabled before proceeding */ 155 if (num_tcs <= 1) 156 return false; 157 158 rss_i = adapter->ring_feature[RING_F_RSS].indices; 159 160 for (tc = 0, offset = 0; tc < num_tcs; tc++, offset += rss_i) { 161 ixgbe_get_first_reg_idx(adapter, tc, &tx_idx, &rx_idx); 162 for (i = 0; i < rss_i; i++, tx_idx++, rx_idx++) { 163 adapter->tx_ring[offset + i]->reg_idx = tx_idx; 164 adapter->rx_ring[offset + i]->reg_idx = rx_idx; 165 adapter->rx_ring[offset + i]->netdev = adapter->netdev; 166 adapter->tx_ring[offset + i]->dcb_tc = tc; 167 adapter->rx_ring[offset + i]->dcb_tc = tc; 168 } 169 } 170 171 return true; 172 } 173 174 #endif 175 /** 176 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov 177 * @adapter: board private structure to initialize 178 * 179 * SR-IOV doesn't use any descriptor rings but changes the default if 180 * no other mapping is used. 181 * 182 */ 183 static bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter) 184 { 185 #ifdef IXGBE_FCOE 186 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE]; 187 #endif /* IXGBE_FCOE */ 188 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ]; 189 struct ixgbe_ring_feature *rss = &adapter->ring_feature[RING_F_RSS]; 190 u16 reg_idx, pool; 191 int i; 192 193 /* only proceed if VMDq is enabled */ 194 if (!(adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)) 195 return false; 196 197 /* start at VMDq register offset for SR-IOV enabled setups */ 198 pool = 0; 199 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 200 for (i = 0; i < adapter->num_rx_queues; i++, reg_idx++) { 201 #ifdef IXGBE_FCOE 202 /* Allow first FCoE queue to be mapped as RSS */ 203 if (fcoe->offset && (i > fcoe->offset)) 204 break; 205 #endif 206 /* If we are greater than indices move to next pool */ 207 if ((reg_idx & ~vmdq->mask) >= rss->indices) { 208 pool++; 209 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 210 } 211 adapter->rx_ring[i]->reg_idx = reg_idx; 212 adapter->rx_ring[i]->netdev = pool ? NULL : adapter->netdev; 213 } 214 215 #ifdef IXGBE_FCOE 216 /* FCoE uses a linear block of queues so just assigning 1:1 */ 217 for (; i < adapter->num_rx_queues; i++, reg_idx++) { 218 adapter->rx_ring[i]->reg_idx = reg_idx; 219 adapter->rx_ring[i]->netdev = adapter->netdev; 220 } 221 222 #endif 223 reg_idx = vmdq->offset * __ALIGN_MASK(1, ~vmdq->mask); 224 for (i = 0; i < adapter->num_tx_queues; i++, reg_idx++) { 225 #ifdef IXGBE_FCOE 226 /* Allow first FCoE queue to be mapped as RSS */ 227 if (fcoe->offset && (i > fcoe->offset)) 228 break; 229 #endif 230 /* If we are greater than indices move to next pool */ 231 if ((reg_idx & rss->mask) >= rss->indices) 232 reg_idx = __ALIGN_MASK(reg_idx, ~vmdq->mask); 233 adapter->tx_ring[i]->reg_idx = reg_idx; 234 } 235 236 #ifdef IXGBE_FCOE 237 /* FCoE uses a linear block of queues so just assigning 1:1 */ 238 for (; i < adapter->num_tx_queues; i++, reg_idx++) 239 adapter->tx_ring[i]->reg_idx = reg_idx; 240 241 #endif 242 243 return true; 244 } 245 246 /** 247 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS 248 * @adapter: board private structure to initialize 249 * 250 * Cache the descriptor ring offsets for RSS to the assigned rings. 251 * 252 **/ 253 static bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter) 254 { 255 int i, reg_idx; 256 257 for (i = 0; i < adapter->num_rx_queues; i++) { 258 adapter->rx_ring[i]->reg_idx = i; 259 adapter->rx_ring[i]->netdev = adapter->netdev; 260 } 261 for (i = 0, reg_idx = 0; i < adapter->num_tx_queues; i++, reg_idx++) 262 adapter->tx_ring[i]->reg_idx = reg_idx; 263 for (i = 0; i < adapter->num_xdp_queues; i++, reg_idx++) 264 adapter->xdp_ring[i]->reg_idx = reg_idx; 265 266 return true; 267 } 268 269 /** 270 * ixgbe_cache_ring_register - Descriptor ring to register mapping 271 * @adapter: board private structure to initialize 272 * 273 * Once we know the feature-set enabled for the device, we'll cache 274 * the register offset the descriptor ring is assigned to. 275 * 276 * Note, the order the various feature calls is important. It must start with 277 * the "most" features enabled at the same time, then trickle down to the 278 * least amount of features turned on at once. 279 **/ 280 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter) 281 { 282 /* start with default case */ 283 adapter->rx_ring[0]->reg_idx = 0; 284 adapter->tx_ring[0]->reg_idx = 0; 285 286 #ifdef CONFIG_IXGBE_DCB 287 if (ixgbe_cache_ring_dcb_sriov(adapter)) 288 return; 289 290 if (ixgbe_cache_ring_dcb(adapter)) 291 return; 292 293 #endif 294 if (ixgbe_cache_ring_sriov(adapter)) 295 return; 296 297 ixgbe_cache_ring_rss(adapter); 298 } 299 300 static int ixgbe_xdp_queues(struct ixgbe_adapter *adapter) 301 { 302 int queues; 303 304 queues = min_t(int, IXGBE_MAX_XDP_QS, nr_cpu_ids); 305 return adapter->xdp_prog ? queues : 0; 306 } 307 308 #define IXGBE_RSS_64Q_MASK 0x3F 309 #define IXGBE_RSS_16Q_MASK 0xF 310 #define IXGBE_RSS_8Q_MASK 0x7 311 #define IXGBE_RSS_4Q_MASK 0x3 312 #define IXGBE_RSS_2Q_MASK 0x1 313 #define IXGBE_RSS_DISABLED_MASK 0x0 314 315 #ifdef CONFIG_IXGBE_DCB 316 /** 317 * ixgbe_set_dcb_sriov_queues: Allocate queues for SR-IOV devices w/ DCB 318 * @adapter: board private structure to initialize 319 * 320 * When SR-IOV (Single Root IO Virtualiztion) is enabled, allocate queues 321 * and VM pools where appropriate. Also assign queues based on DCB 322 * priorities and map accordingly.. 323 * 324 **/ 325 static bool ixgbe_set_dcb_sriov_queues(struct ixgbe_adapter *adapter) 326 { 327 int i; 328 u16 vmdq_i = adapter->ring_feature[RING_F_VMDQ].limit; 329 u16 vmdq_m = 0; 330 #ifdef IXGBE_FCOE 331 u16 fcoe_i = 0; 332 #endif 333 u8 tcs = adapter->hw_tcs; 334 335 /* verify we have DCB queueing enabled before proceeding */ 336 if (tcs <= 1) 337 return false; 338 339 /* verify we have VMDq enabled before proceeding */ 340 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 341 return false; 342 343 /* limit VMDq instances on the PF by number of Tx queues */ 344 vmdq_i = min_t(u16, vmdq_i, MAX_TX_QUEUES / tcs); 345 346 /* Add starting offset to total pool count */ 347 vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset; 348 349 /* 16 pools w/ 8 TC per pool */ 350 if (tcs > 4) { 351 vmdq_i = min_t(u16, vmdq_i, 16); 352 vmdq_m = IXGBE_82599_VMDQ_8Q_MASK; 353 /* 32 pools w/ 4 TC per pool */ 354 } else { 355 vmdq_i = min_t(u16, vmdq_i, 32); 356 vmdq_m = IXGBE_82599_VMDQ_4Q_MASK; 357 } 358 359 #ifdef IXGBE_FCOE 360 /* queues in the remaining pools are available for FCoE */ 361 fcoe_i = (128 / __ALIGN_MASK(1, ~vmdq_m)) - vmdq_i; 362 363 #endif 364 /* remove the starting offset from the pool count */ 365 vmdq_i -= adapter->ring_feature[RING_F_VMDQ].offset; 366 367 /* save features for later use */ 368 adapter->ring_feature[RING_F_VMDQ].indices = vmdq_i; 369 adapter->ring_feature[RING_F_VMDQ].mask = vmdq_m; 370 371 /* 372 * We do not support DCB, VMDq, and RSS all simultaneously 373 * so we will disable RSS since it is the lowest priority 374 */ 375 adapter->ring_feature[RING_F_RSS].indices = 1; 376 adapter->ring_feature[RING_F_RSS].mask = IXGBE_RSS_DISABLED_MASK; 377 378 /* disable ATR as it is not supported when VMDq is enabled */ 379 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 380 381 adapter->num_rx_pools = vmdq_i; 382 adapter->num_rx_queues_per_pool = tcs; 383 384 adapter->num_tx_queues = vmdq_i * tcs; 385 adapter->num_xdp_queues = 0; 386 adapter->num_rx_queues = vmdq_i * tcs; 387 388 #ifdef IXGBE_FCOE 389 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 390 struct ixgbe_ring_feature *fcoe; 391 392 fcoe = &adapter->ring_feature[RING_F_FCOE]; 393 394 /* limit ourselves based on feature limits */ 395 fcoe_i = min_t(u16, fcoe_i, fcoe->limit); 396 397 if (fcoe_i) { 398 /* alloc queues for FCoE separately */ 399 fcoe->indices = fcoe_i; 400 fcoe->offset = vmdq_i * tcs; 401 402 /* add queues to adapter */ 403 adapter->num_tx_queues += fcoe_i; 404 adapter->num_rx_queues += fcoe_i; 405 } else if (tcs > 1) { 406 /* use queue belonging to FcoE TC */ 407 fcoe->indices = 1; 408 fcoe->offset = ixgbe_fcoe_get_tc(adapter); 409 } else { 410 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED; 411 412 fcoe->indices = 0; 413 fcoe->offset = 0; 414 } 415 } 416 417 #endif /* IXGBE_FCOE */ 418 /* configure TC to queue mapping */ 419 for (i = 0; i < tcs; i++) 420 netdev_set_tc_queue(adapter->netdev, i, 1, i); 421 422 return true; 423 } 424 425 static bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter) 426 { 427 struct net_device *dev = adapter->netdev; 428 struct ixgbe_ring_feature *f; 429 int rss_i, rss_m, i; 430 int tcs; 431 432 /* Map queue offset and counts onto allocated tx queues */ 433 tcs = adapter->hw_tcs; 434 435 /* verify we have DCB queueing enabled before proceeding */ 436 if (tcs <= 1) 437 return false; 438 439 /* determine the upper limit for our current DCB mode */ 440 rss_i = dev->num_tx_queues / tcs; 441 if (adapter->hw.mac.type == ixgbe_mac_82598EB) { 442 /* 8 TC w/ 4 queues per TC */ 443 rss_i = min_t(u16, rss_i, 4); 444 rss_m = IXGBE_RSS_4Q_MASK; 445 } else if (tcs > 4) { 446 /* 8 TC w/ 8 queues per TC */ 447 rss_i = min_t(u16, rss_i, 8); 448 rss_m = IXGBE_RSS_8Q_MASK; 449 } else { 450 /* 4 TC w/ 16 queues per TC */ 451 rss_i = min_t(u16, rss_i, 16); 452 rss_m = IXGBE_RSS_16Q_MASK; 453 } 454 455 /* set RSS mask and indices */ 456 f = &adapter->ring_feature[RING_F_RSS]; 457 rss_i = min_t(int, rss_i, f->limit); 458 f->indices = rss_i; 459 f->mask = rss_m; 460 461 /* disable ATR as it is not supported when multiple TCs are enabled */ 462 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 463 464 #ifdef IXGBE_FCOE 465 /* FCoE enabled queues require special configuration indexed 466 * by feature specific indices and offset. Here we map FCoE 467 * indices onto the DCB queue pairs allowing FCoE to own 468 * configuration later. 469 */ 470 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 471 u8 tc = ixgbe_fcoe_get_tc(adapter); 472 473 f = &adapter->ring_feature[RING_F_FCOE]; 474 f->indices = min_t(u16, rss_i, f->limit); 475 f->offset = rss_i * tc; 476 } 477 478 #endif /* IXGBE_FCOE */ 479 for (i = 0; i < tcs; i++) 480 netdev_set_tc_queue(dev, i, rss_i, rss_i * i); 481 482 adapter->num_tx_queues = rss_i * tcs; 483 adapter->num_xdp_queues = 0; 484 adapter->num_rx_queues = rss_i * tcs; 485 486 return true; 487 } 488 489 #endif 490 /** 491 * ixgbe_set_sriov_queues - Allocate queues for SR-IOV devices 492 * @adapter: board private structure to initialize 493 * 494 * When SR-IOV (Single Root IO Virtualiztion) is enabled, allocate queues 495 * and VM pools where appropriate. If RSS is available, then also try and 496 * enable RSS and map accordingly. 497 * 498 **/ 499 static bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter) 500 { 501 u16 vmdq_i = adapter->ring_feature[RING_F_VMDQ].limit; 502 u16 vmdq_m = 0; 503 u16 rss_i = adapter->ring_feature[RING_F_RSS].limit; 504 u16 rss_m = IXGBE_RSS_DISABLED_MASK; 505 #ifdef IXGBE_FCOE 506 u16 fcoe_i = 0; 507 #endif 508 509 /* only proceed if SR-IOV is enabled */ 510 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) 511 return false; 512 513 /* limit l2fwd RSS based on total Tx queue limit */ 514 rss_i = min_t(u16, rss_i, MAX_TX_QUEUES / vmdq_i); 515 516 /* Add starting offset to total pool count */ 517 vmdq_i += adapter->ring_feature[RING_F_VMDQ].offset; 518 519 /* double check we are limited to maximum pools */ 520 vmdq_i = min_t(u16, IXGBE_MAX_VMDQ_INDICES, vmdq_i); 521 522 /* 64 pool mode with 2 queues per pool */ 523 if (vmdq_i > 32) { 524 vmdq_m = IXGBE_82599_VMDQ_2Q_MASK; 525 rss_m = IXGBE_RSS_2Q_MASK; 526 rss_i = min_t(u16, rss_i, 2); 527 /* 32 pool mode with up to 4 queues per pool */ 528 } else { 529 vmdq_m = IXGBE_82599_VMDQ_4Q_MASK; 530 rss_m = IXGBE_RSS_4Q_MASK; 531 /* We can support 4, 2, or 1 queues */ 532 rss_i = (rss_i > 3) ? 4 : (rss_i > 1) ? 2 : 1; 533 } 534 535 #ifdef IXGBE_FCOE 536 /* queues in the remaining pools are available for FCoE */ 537 fcoe_i = 128 - (vmdq_i * __ALIGN_MASK(1, ~vmdq_m)); 538 539 #endif 540 /* remove the starting offset from the pool count */ 541 vmdq_i -= adapter->ring_feature[RING_F_VMDQ].offset; 542 543 /* save features for later use */ 544 adapter->ring_feature[RING_F_VMDQ].indices = vmdq_i; 545 adapter->ring_feature[RING_F_VMDQ].mask = vmdq_m; 546 547 /* limit RSS based on user input and save for later use */ 548 adapter->ring_feature[RING_F_RSS].indices = rss_i; 549 adapter->ring_feature[RING_F_RSS].mask = rss_m; 550 551 adapter->num_rx_pools = vmdq_i; 552 adapter->num_rx_queues_per_pool = rss_i; 553 554 adapter->num_rx_queues = vmdq_i * rss_i; 555 adapter->num_tx_queues = vmdq_i * rss_i; 556 adapter->num_xdp_queues = 0; 557 558 /* disable ATR as it is not supported when VMDq is enabled */ 559 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 560 561 #ifdef IXGBE_FCOE 562 /* 563 * FCoE can use rings from adjacent buffers to allow RSS 564 * like behavior. To account for this we need to add the 565 * FCoE indices to the total ring count. 566 */ 567 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 568 struct ixgbe_ring_feature *fcoe; 569 570 fcoe = &adapter->ring_feature[RING_F_FCOE]; 571 572 /* limit ourselves based on feature limits */ 573 fcoe_i = min_t(u16, fcoe_i, fcoe->limit); 574 575 if (vmdq_i > 1 && fcoe_i) { 576 /* alloc queues for FCoE separately */ 577 fcoe->indices = fcoe_i; 578 fcoe->offset = vmdq_i * rss_i; 579 } else { 580 /* merge FCoE queues with RSS queues */ 581 fcoe_i = min_t(u16, fcoe_i + rss_i, num_online_cpus()); 582 583 /* limit indices to rss_i if MSI-X is disabled */ 584 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 585 fcoe_i = rss_i; 586 587 /* attempt to reserve some queues for just FCoE */ 588 fcoe->indices = min_t(u16, fcoe_i, fcoe->limit); 589 fcoe->offset = fcoe_i - fcoe->indices; 590 591 fcoe_i -= rss_i; 592 } 593 594 /* add queues to adapter */ 595 adapter->num_tx_queues += fcoe_i; 596 adapter->num_rx_queues += fcoe_i; 597 } 598 599 #endif 600 /* To support macvlan offload we have to use num_tc to 601 * restrict the queues that can be used by the device. 602 * By doing this we can avoid reporting a false number of 603 * queues. 604 */ 605 if (vmdq_i > 1) 606 netdev_set_num_tc(adapter->netdev, 1); 607 608 /* populate TC0 for use by pool 0 */ 609 netdev_set_tc_queue(adapter->netdev, 0, 610 adapter->num_rx_queues_per_pool, 0); 611 612 return true; 613 } 614 615 /** 616 * ixgbe_set_rss_queues - Allocate queues for RSS 617 * @adapter: board private structure to initialize 618 * 619 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try 620 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU. 621 * 622 **/ 623 static bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter) 624 { 625 struct ixgbe_hw *hw = &adapter->hw; 626 struct ixgbe_ring_feature *f; 627 u16 rss_i; 628 629 /* set mask for 16 queue limit of RSS */ 630 f = &adapter->ring_feature[RING_F_RSS]; 631 rss_i = f->limit; 632 633 f->indices = rss_i; 634 635 if (hw->mac.type < ixgbe_mac_X550) 636 f->mask = IXGBE_RSS_16Q_MASK; 637 else 638 f->mask = IXGBE_RSS_64Q_MASK; 639 640 /* disable ATR by default, it will be configured below */ 641 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE; 642 643 /* 644 * Use Flow Director in addition to RSS to ensure the best 645 * distribution of flows across cores, even when an FDIR flow 646 * isn't matched. 647 */ 648 if (rss_i > 1 && adapter->atr_sample_rate) { 649 f = &adapter->ring_feature[RING_F_FDIR]; 650 651 rss_i = f->indices = f->limit; 652 653 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) 654 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE; 655 } 656 657 #ifdef IXGBE_FCOE 658 /* 659 * FCoE can exist on the same rings as standard network traffic 660 * however it is preferred to avoid that if possible. In order 661 * to get the best performance we allocate as many FCoE queues 662 * as we can and we place them at the end of the ring array to 663 * avoid sharing queues with standard RSS on systems with 24 or 664 * more CPUs. 665 */ 666 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { 667 struct net_device *dev = adapter->netdev; 668 u16 fcoe_i; 669 670 f = &adapter->ring_feature[RING_F_FCOE]; 671 672 /* merge FCoE queues with RSS queues */ 673 fcoe_i = min_t(u16, f->limit + rss_i, num_online_cpus()); 674 fcoe_i = min_t(u16, fcoe_i, dev->num_tx_queues); 675 676 /* limit indices to rss_i if MSI-X is disabled */ 677 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 678 fcoe_i = rss_i; 679 680 /* attempt to reserve some queues for just FCoE */ 681 f->indices = min_t(u16, fcoe_i, f->limit); 682 f->offset = fcoe_i - f->indices; 683 rss_i = max_t(u16, fcoe_i, rss_i); 684 } 685 686 #endif /* IXGBE_FCOE */ 687 adapter->num_rx_queues = rss_i; 688 adapter->num_tx_queues = rss_i; 689 adapter->num_xdp_queues = ixgbe_xdp_queues(adapter); 690 691 return true; 692 } 693 694 /** 695 * ixgbe_set_num_queues - Allocate queues for device, feature dependent 696 * @adapter: board private structure to initialize 697 * 698 * This is the top level queue allocation routine. The order here is very 699 * important, starting with the "most" number of features turned on at once, 700 * and ending with the smallest set of features. This way large combinations 701 * can be allocated if they're turned on, and smaller combinations are the 702 * fallthrough conditions. 703 * 704 **/ 705 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter) 706 { 707 /* Start with base case */ 708 adapter->num_rx_queues = 1; 709 adapter->num_tx_queues = 1; 710 adapter->num_xdp_queues = 0; 711 adapter->num_rx_pools = 1; 712 adapter->num_rx_queues_per_pool = 1; 713 714 #ifdef CONFIG_IXGBE_DCB 715 if (ixgbe_set_dcb_sriov_queues(adapter)) 716 return; 717 718 if (ixgbe_set_dcb_queues(adapter)) 719 return; 720 721 #endif 722 if (ixgbe_set_sriov_queues(adapter)) 723 return; 724 725 ixgbe_set_rss_queues(adapter); 726 } 727 728 /** 729 * ixgbe_acquire_msix_vectors - acquire MSI-X vectors 730 * @adapter: board private structure 731 * 732 * Attempts to acquire a suitable range of MSI-X vector interrupts. Will 733 * return a negative error code if unable to acquire MSI-X vectors for any 734 * reason. 735 */ 736 static int ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter) 737 { 738 struct ixgbe_hw *hw = &adapter->hw; 739 int i, vectors, vector_threshold; 740 741 /* We start by asking for one vector per queue pair with XDP queues 742 * being stacked with TX queues. 743 */ 744 vectors = max(adapter->num_rx_queues, adapter->num_tx_queues); 745 vectors = max(vectors, adapter->num_xdp_queues); 746 747 /* It is easy to be greedy for MSI-X vectors. However, it really 748 * doesn't do much good if we have a lot more vectors than CPUs. We'll 749 * be somewhat conservative and only ask for (roughly) the same number 750 * of vectors as there are CPUs. 751 */ 752 vectors = min_t(int, vectors, num_online_cpus()); 753 754 /* Some vectors are necessary for non-queue interrupts */ 755 vectors += NON_Q_VECTORS; 756 757 /* Hardware can only support a maximum of hw.mac->max_msix_vectors. 758 * With features such as RSS and VMDq, we can easily surpass the 759 * number of Rx and Tx descriptor queues supported by our device. 760 * Thus, we cap the maximum in the rare cases where the CPU count also 761 * exceeds our vector limit 762 */ 763 vectors = min_t(int, vectors, hw->mac.max_msix_vectors); 764 765 /* We want a minimum of two MSI-X vectors for (1) a TxQ[0] + RxQ[0] 766 * handler, and (2) an Other (Link Status Change, etc.) handler. 767 */ 768 vector_threshold = MIN_MSIX_COUNT; 769 770 adapter->msix_entries = kcalloc(vectors, 771 sizeof(struct msix_entry), 772 GFP_KERNEL); 773 if (!adapter->msix_entries) 774 return -ENOMEM; 775 776 for (i = 0; i < vectors; i++) 777 adapter->msix_entries[i].entry = i; 778 779 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries, 780 vector_threshold, vectors); 781 782 if (vectors < 0) { 783 /* A negative count of allocated vectors indicates an error in 784 * acquiring within the specified range of MSI-X vectors 785 */ 786 e_dev_warn("Failed to allocate MSI-X interrupts. Err: %d\n", 787 vectors); 788 789 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; 790 kfree(adapter->msix_entries); 791 adapter->msix_entries = NULL; 792 793 return vectors; 794 } 795 796 /* we successfully allocated some number of vectors within our 797 * requested range. 798 */ 799 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; 800 801 /* Adjust for only the vectors we'll use, which is minimum 802 * of max_q_vectors, or the number of vectors we were allocated. 803 */ 804 vectors -= NON_Q_VECTORS; 805 adapter->num_q_vectors = min_t(int, vectors, adapter->max_q_vectors); 806 807 return 0; 808 } 809 810 static void ixgbe_add_ring(struct ixgbe_ring *ring, 811 struct ixgbe_ring_container *head) 812 { 813 ring->next = head->ring; 814 head->ring = ring; 815 head->count++; 816 head->next_update = jiffies + 1; 817 } 818 819 /** 820 * ixgbe_alloc_q_vector - Allocate memory for a single interrupt vector 821 * @adapter: board private structure to initialize 822 * @v_count: q_vectors allocated on adapter, used for ring interleaving 823 * @v_idx: index of vector in adapter struct 824 * @txr_count: total number of Tx rings to allocate 825 * @txr_idx: index of first Tx ring to allocate 826 * @xdp_count: total number of XDP rings to allocate 827 * @xdp_idx: index of first XDP ring to allocate 828 * @rxr_count: total number of Rx rings to allocate 829 * @rxr_idx: index of first Rx ring to allocate 830 * 831 * We allocate one q_vector. If allocation fails we return -ENOMEM. 832 **/ 833 static int ixgbe_alloc_q_vector(struct ixgbe_adapter *adapter, 834 int v_count, int v_idx, 835 int txr_count, int txr_idx, 836 int xdp_count, int xdp_idx, 837 int rxr_count, int rxr_idx) 838 { 839 int node = dev_to_node(&adapter->pdev->dev); 840 struct ixgbe_q_vector *q_vector; 841 struct ixgbe_ring *ring; 842 int cpu = -1; 843 int ring_count; 844 u8 tcs = adapter->hw_tcs; 845 846 ring_count = txr_count + rxr_count + xdp_count; 847 848 /* customize cpu for Flow Director mapping */ 849 if ((tcs <= 1) && !(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) { 850 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices; 851 if (rss_i > 1 && adapter->atr_sample_rate) { 852 cpu = cpumask_local_spread(v_idx, node); 853 node = cpu_to_node(cpu); 854 } 855 } 856 857 /* allocate q_vector and rings */ 858 q_vector = kzalloc_node(struct_size(q_vector, ring, ring_count), 859 GFP_KERNEL, node); 860 if (!q_vector) 861 q_vector = kzalloc(struct_size(q_vector, ring, ring_count), 862 GFP_KERNEL); 863 if (!q_vector) 864 return -ENOMEM; 865 866 /* setup affinity mask and node */ 867 if (cpu != -1) 868 cpumask_set_cpu(cpu, &q_vector->affinity_mask); 869 q_vector->numa_node = node; 870 871 #ifdef CONFIG_IXGBE_DCA 872 /* initialize CPU for DCA */ 873 q_vector->cpu = -1; 874 875 #endif 876 /* initialize NAPI */ 877 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbe_poll); 878 879 /* tie q_vector and adapter together */ 880 adapter->q_vector[v_idx] = q_vector; 881 q_vector->adapter = adapter; 882 q_vector->v_idx = v_idx; 883 884 /* initialize work limits */ 885 q_vector->tx.work_limit = adapter->tx_work_limit; 886 887 /* Initialize setting for adaptive ITR */ 888 q_vector->tx.itr = IXGBE_ITR_ADAPTIVE_MAX_USECS | 889 IXGBE_ITR_ADAPTIVE_LATENCY; 890 q_vector->rx.itr = IXGBE_ITR_ADAPTIVE_MAX_USECS | 891 IXGBE_ITR_ADAPTIVE_LATENCY; 892 893 /* intialize ITR */ 894 if (txr_count && !rxr_count) { 895 /* tx only vector */ 896 if (adapter->tx_itr_setting == 1) 897 q_vector->itr = IXGBE_12K_ITR; 898 else 899 q_vector->itr = adapter->tx_itr_setting; 900 } else { 901 /* rx or rx/tx vector */ 902 if (adapter->rx_itr_setting == 1) 903 q_vector->itr = IXGBE_20K_ITR; 904 else 905 q_vector->itr = adapter->rx_itr_setting; 906 } 907 908 /* initialize pointer to rings */ 909 ring = q_vector->ring; 910 911 while (txr_count) { 912 /* assign generic ring traits */ 913 ring->dev = &adapter->pdev->dev; 914 ring->netdev = adapter->netdev; 915 916 /* configure backlink on ring */ 917 ring->q_vector = q_vector; 918 919 /* update q_vector Tx values */ 920 ixgbe_add_ring(ring, &q_vector->tx); 921 922 /* apply Tx specific ring traits */ 923 ring->count = adapter->tx_ring_count; 924 ring->queue_index = txr_idx; 925 926 /* assign ring to adapter */ 927 WRITE_ONCE(adapter->tx_ring[txr_idx], ring); 928 929 /* update count and index */ 930 txr_count--; 931 txr_idx += v_count; 932 933 /* push pointer to next ring */ 934 ring++; 935 } 936 937 while (xdp_count) { 938 /* assign generic ring traits */ 939 ring->dev = &adapter->pdev->dev; 940 ring->netdev = adapter->netdev; 941 942 /* configure backlink on ring */ 943 ring->q_vector = q_vector; 944 945 /* update q_vector Tx values */ 946 ixgbe_add_ring(ring, &q_vector->tx); 947 948 /* apply Tx specific ring traits */ 949 ring->count = adapter->tx_ring_count; 950 ring->queue_index = xdp_idx; 951 set_ring_xdp(ring); 952 spin_lock_init(&ring->tx_lock); 953 954 /* assign ring to adapter */ 955 WRITE_ONCE(adapter->xdp_ring[xdp_idx], ring); 956 957 /* update count and index */ 958 xdp_count--; 959 xdp_idx++; 960 961 /* push pointer to next ring */ 962 ring++; 963 } 964 965 while (rxr_count) { 966 /* assign generic ring traits */ 967 ring->dev = &adapter->pdev->dev; 968 ring->netdev = adapter->netdev; 969 970 /* configure backlink on ring */ 971 ring->q_vector = q_vector; 972 973 /* update q_vector Rx values */ 974 ixgbe_add_ring(ring, &q_vector->rx); 975 976 /* 977 * 82599 errata, UDP frames with a 0 checksum 978 * can be marked as checksum errors. 979 */ 980 if (adapter->hw.mac.type == ixgbe_mac_82599EB) 981 set_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state); 982 983 #ifdef IXGBE_FCOE 984 if (adapter->netdev->features & NETIF_F_FCOE_MTU) { 985 struct ixgbe_ring_feature *f; 986 f = &adapter->ring_feature[RING_F_FCOE]; 987 if ((rxr_idx >= f->offset) && 988 (rxr_idx < f->offset + f->indices)) 989 set_bit(__IXGBE_RX_FCOE, &ring->state); 990 } 991 992 #endif /* IXGBE_FCOE */ 993 /* apply Rx specific ring traits */ 994 ring->count = adapter->rx_ring_count; 995 ring->queue_index = rxr_idx; 996 997 /* assign ring to adapter */ 998 WRITE_ONCE(adapter->rx_ring[rxr_idx], ring); 999 1000 /* update count and index */ 1001 rxr_count--; 1002 rxr_idx += v_count; 1003 1004 /* push pointer to next ring */ 1005 ring++; 1006 } 1007 1008 return 0; 1009 } 1010 1011 /** 1012 * ixgbe_free_q_vector - Free memory allocated for specific interrupt vector 1013 * @adapter: board private structure to initialize 1014 * @v_idx: Index of vector to be freed 1015 * 1016 * This function frees the memory allocated to the q_vector. In addition if 1017 * NAPI is enabled it will delete any references to the NAPI struct prior 1018 * to freeing the q_vector. 1019 **/ 1020 static void ixgbe_free_q_vector(struct ixgbe_adapter *adapter, int v_idx) 1021 { 1022 struct ixgbe_q_vector *q_vector = adapter->q_vector[v_idx]; 1023 struct ixgbe_ring *ring; 1024 1025 ixgbe_for_each_ring(ring, q_vector->tx) { 1026 if (ring_is_xdp(ring)) 1027 WRITE_ONCE(adapter->xdp_ring[ring->queue_index], NULL); 1028 else 1029 WRITE_ONCE(adapter->tx_ring[ring->queue_index], NULL); 1030 } 1031 1032 ixgbe_for_each_ring(ring, q_vector->rx) 1033 WRITE_ONCE(adapter->rx_ring[ring->queue_index], NULL); 1034 1035 adapter->q_vector[v_idx] = NULL; 1036 __netif_napi_del(&q_vector->napi); 1037 1038 /* 1039 * after a call to __netif_napi_del() napi may still be used and 1040 * ixgbe_get_stats64() might access the rings on this vector, 1041 * we must wait a grace period before freeing it. 1042 */ 1043 kfree_rcu(q_vector, rcu); 1044 } 1045 1046 /** 1047 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors 1048 * @adapter: board private structure to initialize 1049 * 1050 * We allocate one q_vector per queue interrupt. If allocation fails we 1051 * return -ENOMEM. 1052 **/ 1053 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter) 1054 { 1055 int q_vectors = adapter->num_q_vectors; 1056 int rxr_remaining = adapter->num_rx_queues; 1057 int txr_remaining = adapter->num_tx_queues; 1058 int xdp_remaining = adapter->num_xdp_queues; 1059 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0; 1060 int err, i; 1061 1062 /* only one q_vector if MSI-X is disabled. */ 1063 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) 1064 q_vectors = 1; 1065 1066 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) { 1067 for (; rxr_remaining; v_idx++) { 1068 err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx, 1069 0, 0, 0, 0, 1, rxr_idx); 1070 1071 if (err) 1072 goto err_out; 1073 1074 /* update counts and index */ 1075 rxr_remaining--; 1076 rxr_idx++; 1077 } 1078 } 1079 1080 for (; v_idx < q_vectors; v_idx++) { 1081 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx); 1082 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx); 1083 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors - v_idx); 1084 1085 err = ixgbe_alloc_q_vector(adapter, q_vectors, v_idx, 1086 tqpv, txr_idx, 1087 xqpv, xdp_idx, 1088 rqpv, rxr_idx); 1089 1090 if (err) 1091 goto err_out; 1092 1093 /* update counts and index */ 1094 rxr_remaining -= rqpv; 1095 txr_remaining -= tqpv; 1096 xdp_remaining -= xqpv; 1097 rxr_idx++; 1098 txr_idx++; 1099 xdp_idx += xqpv; 1100 } 1101 1102 for (i = 0; i < adapter->num_rx_queues; i++) { 1103 if (adapter->rx_ring[i]) 1104 adapter->rx_ring[i]->ring_idx = i; 1105 } 1106 1107 for (i = 0; i < adapter->num_tx_queues; i++) { 1108 if (adapter->tx_ring[i]) 1109 adapter->tx_ring[i]->ring_idx = i; 1110 } 1111 1112 for (i = 0; i < adapter->num_xdp_queues; i++) { 1113 if (adapter->xdp_ring[i]) 1114 adapter->xdp_ring[i]->ring_idx = i; 1115 } 1116 1117 return 0; 1118 1119 err_out: 1120 adapter->num_tx_queues = 0; 1121 adapter->num_xdp_queues = 0; 1122 adapter->num_rx_queues = 0; 1123 adapter->num_q_vectors = 0; 1124 1125 while (v_idx--) 1126 ixgbe_free_q_vector(adapter, v_idx); 1127 1128 return -ENOMEM; 1129 } 1130 1131 /** 1132 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors 1133 * @adapter: board private structure to initialize 1134 * 1135 * This function frees the memory allocated to the q_vectors. In addition if 1136 * NAPI is enabled it will delete any references to the NAPI struct prior 1137 * to freeing the q_vector. 1138 **/ 1139 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter) 1140 { 1141 int v_idx = adapter->num_q_vectors; 1142 1143 adapter->num_tx_queues = 0; 1144 adapter->num_xdp_queues = 0; 1145 adapter->num_rx_queues = 0; 1146 adapter->num_q_vectors = 0; 1147 1148 while (v_idx--) 1149 ixgbe_free_q_vector(adapter, v_idx); 1150 } 1151 1152 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter) 1153 { 1154 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { 1155 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; 1156 pci_disable_msix(adapter->pdev); 1157 kfree(adapter->msix_entries); 1158 adapter->msix_entries = NULL; 1159 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { 1160 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED; 1161 pci_disable_msi(adapter->pdev); 1162 } 1163 } 1164 1165 /** 1166 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported 1167 * @adapter: board private structure to initialize 1168 * 1169 * Attempt to configure the interrupts using the best available 1170 * capabilities of the hardware and the kernel. 1171 **/ 1172 static void ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter) 1173 { 1174 int err; 1175 1176 /* We will try to get MSI-X interrupts first */ 1177 if (!ixgbe_acquire_msix_vectors(adapter)) 1178 return; 1179 1180 /* At this point, we do not have MSI-X capabilities. We need to 1181 * reconfigure or disable various features which require MSI-X 1182 * capability. 1183 */ 1184 1185 /* Disable DCB unless we only have a single traffic class */ 1186 if (adapter->hw_tcs > 1) { 1187 e_dev_warn("Number of DCB TCs exceeds number of available queues. Disabling DCB support.\n"); 1188 netdev_reset_tc(adapter->netdev); 1189 1190 if (adapter->hw.mac.type == ixgbe_mac_82598EB) 1191 adapter->hw.fc.requested_mode = adapter->last_lfc_mode; 1192 1193 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED; 1194 adapter->temp_dcb_cfg.pfc_mode_enable = false; 1195 adapter->dcb_cfg.pfc_mode_enable = false; 1196 } 1197 1198 adapter->hw_tcs = 0; 1199 adapter->dcb_cfg.num_tcs.pg_tcs = 1; 1200 adapter->dcb_cfg.num_tcs.pfc_tcs = 1; 1201 1202 /* Disable SR-IOV support */ 1203 e_dev_warn("Disabling SR-IOV support\n"); 1204 ixgbe_disable_sriov(adapter); 1205 1206 /* Disable RSS */ 1207 e_dev_warn("Disabling RSS support\n"); 1208 adapter->ring_feature[RING_F_RSS].limit = 1; 1209 1210 /* recalculate number of queues now that many features have been 1211 * changed or disabled. 1212 */ 1213 ixgbe_set_num_queues(adapter); 1214 adapter->num_q_vectors = 1; 1215 1216 err = pci_enable_msi(adapter->pdev); 1217 if (err) 1218 e_dev_warn("Failed to allocate MSI interrupt, falling back to legacy. Error: %d\n", 1219 err); 1220 else 1221 adapter->flags |= IXGBE_FLAG_MSI_ENABLED; 1222 } 1223 1224 /** 1225 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme 1226 * @adapter: board private structure to initialize 1227 * 1228 * We determine which interrupt scheme to use based on... 1229 * - Kernel support (MSI, MSI-X) 1230 * - which can be user-defined (via MODULE_PARAM) 1231 * - Hardware queue count (num_*_queues) 1232 * - defined by miscellaneous hardware support/features (RSS, etc.) 1233 **/ 1234 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter) 1235 { 1236 int err; 1237 1238 /* Number of supported queues */ 1239 ixgbe_set_num_queues(adapter); 1240 1241 /* Set interrupt mode */ 1242 ixgbe_set_interrupt_capability(adapter); 1243 1244 err = ixgbe_alloc_q_vectors(adapter); 1245 if (err) { 1246 e_dev_err("Unable to allocate memory for queue vectors\n"); 1247 goto err_alloc_q_vectors; 1248 } 1249 1250 ixgbe_cache_ring_register(adapter); 1251 1252 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count = %u\n", 1253 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled", 1254 adapter->num_rx_queues, adapter->num_tx_queues, 1255 adapter->num_xdp_queues); 1256 1257 set_bit(__IXGBE_DOWN, &adapter->state); 1258 1259 return 0; 1260 1261 err_alloc_q_vectors: 1262 ixgbe_reset_interrupt_capability(adapter); 1263 return err; 1264 } 1265 1266 /** 1267 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings 1268 * @adapter: board private structure to clear interrupt scheme on 1269 * 1270 * We go through and clear interrupt specific resources and reset the structure 1271 * to pre-load conditions 1272 **/ 1273 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter) 1274 { 1275 adapter->num_tx_queues = 0; 1276 adapter->num_xdp_queues = 0; 1277 adapter->num_rx_queues = 0; 1278 1279 ixgbe_free_q_vectors(adapter); 1280 ixgbe_reset_interrupt_capability(adapter); 1281 } 1282 1283 void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens, 1284 u32 fceof_saidx, u32 type_tucmd, u32 mss_l4len_idx) 1285 { 1286 struct ixgbe_adv_tx_context_desc *context_desc; 1287 u16 i = tx_ring->next_to_use; 1288 1289 context_desc = IXGBE_TX_CTXTDESC(tx_ring, i); 1290 1291 i++; 1292 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; 1293 1294 /* set bits to identify this as an advanced context descriptor */ 1295 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT; 1296 1297 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); 1298 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx); 1299 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); 1300 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); 1301 } 1302 1303