1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2013 - 2018 Intel Corporation. */ 3 4 /* ethtool support for iavf */ 5 #include "iavf.h" 6 7 #include <linux/uaccess.h> 8 9 /* ethtool statistics helpers */ 10 11 /** 12 * struct iavf_stats - definition for an ethtool statistic 13 * @stat_string: statistic name to display in ethtool -S output 14 * @sizeof_stat: the sizeof() the stat, must be no greater than sizeof(u64) 15 * @stat_offset: offsetof() the stat from a base pointer 16 * 17 * This structure defines a statistic to be added to the ethtool stats buffer. 18 * It defines a statistic as offset from a common base pointer. Stats should 19 * be defined in constant arrays using the IAVF_STAT macro, with every element 20 * of the array using the same _type for calculating the sizeof_stat and 21 * stat_offset. 22 * 23 * The @sizeof_stat is expected to be sizeof(u8), sizeof(u16), sizeof(u32) or 24 * sizeof(u64). Other sizes are not expected and will produce a WARN_ONCE from 25 * the iavf_add_ethtool_stat() helper function. 26 * 27 * The @stat_string is interpreted as a format string, allowing formatted 28 * values to be inserted while looping over multiple structures for a given 29 * statistics array. Thus, every statistic string in an array should have the 30 * same type and number of format specifiers, to be formatted by variadic 31 * arguments to the iavf_add_stat_string() helper function. 32 **/ 33 struct iavf_stats { 34 char stat_string[ETH_GSTRING_LEN]; 35 int sizeof_stat; 36 int stat_offset; 37 }; 38 39 /* Helper macro to define an iavf_stat structure with proper size and type. 40 * Use this when defining constant statistics arrays. Note that @_type expects 41 * only a type name and is used multiple times. 42 */ 43 #define IAVF_STAT(_type, _name, _stat) { \ 44 .stat_string = _name, \ 45 .sizeof_stat = sizeof_field(_type, _stat), \ 46 .stat_offset = offsetof(_type, _stat) \ 47 } 48 49 /* Helper macro for defining some statistics related to queues */ 50 #define IAVF_QUEUE_STAT(_name, _stat) \ 51 IAVF_STAT(struct iavf_ring, _name, _stat) 52 53 /* Stats associated with a Tx or Rx ring */ 54 static const struct iavf_stats iavf_gstrings_queue_stats[] = { 55 IAVF_QUEUE_STAT("%s-%u.packets", stats.packets), 56 IAVF_QUEUE_STAT("%s-%u.bytes", stats.bytes), 57 }; 58 59 /** 60 * iavf_add_one_ethtool_stat - copy the stat into the supplied buffer 61 * @data: location to store the stat value 62 * @pointer: basis for where to copy from 63 * @stat: the stat definition 64 * 65 * Copies the stat data defined by the pointer and stat structure pair into 66 * the memory supplied as data. Used to implement iavf_add_ethtool_stats and 67 * iavf_add_queue_stats. If the pointer is null, data will be zero'd. 68 */ 69 static void 70 iavf_add_one_ethtool_stat(u64 *data, void *pointer, 71 const struct iavf_stats *stat) 72 { 73 char *p; 74 75 if (!pointer) { 76 /* ensure that the ethtool data buffer is zero'd for any stats 77 * which don't have a valid pointer. 78 */ 79 *data = 0; 80 return; 81 } 82 83 p = (char *)pointer + stat->stat_offset; 84 switch (stat->sizeof_stat) { 85 case sizeof(u64): 86 *data = *((u64 *)p); 87 break; 88 case sizeof(u32): 89 *data = *((u32 *)p); 90 break; 91 case sizeof(u16): 92 *data = *((u16 *)p); 93 break; 94 case sizeof(u8): 95 *data = *((u8 *)p); 96 break; 97 default: 98 WARN_ONCE(1, "unexpected stat size for %s", 99 stat->stat_string); 100 *data = 0; 101 } 102 } 103 104 /** 105 * __iavf_add_ethtool_stats - copy stats into the ethtool supplied buffer 106 * @data: ethtool stats buffer 107 * @pointer: location to copy stats from 108 * @stats: array of stats to copy 109 * @size: the size of the stats definition 110 * 111 * Copy the stats defined by the stats array using the pointer as a base into 112 * the data buffer supplied by ethtool. Updates the data pointer to point to 113 * the next empty location for successive calls to __iavf_add_ethtool_stats. 114 * If pointer is null, set the data values to zero and update the pointer to 115 * skip these stats. 116 **/ 117 static void 118 __iavf_add_ethtool_stats(u64 **data, void *pointer, 119 const struct iavf_stats stats[], 120 const unsigned int size) 121 { 122 unsigned int i; 123 124 for (i = 0; i < size; i++) 125 iavf_add_one_ethtool_stat((*data)++, pointer, &stats[i]); 126 } 127 128 /** 129 * iavf_add_ethtool_stats - copy stats into ethtool supplied buffer 130 * @data: ethtool stats buffer 131 * @pointer: location where stats are stored 132 * @stats: static const array of stat definitions 133 * 134 * Macro to ease the use of __iavf_add_ethtool_stats by taking a static 135 * constant stats array and passing the ARRAY_SIZE(). This avoids typos by 136 * ensuring that we pass the size associated with the given stats array. 137 * 138 * The parameter @stats is evaluated twice, so parameters with side effects 139 * should be avoided. 140 **/ 141 #define iavf_add_ethtool_stats(data, pointer, stats) \ 142 __iavf_add_ethtool_stats(data, pointer, stats, ARRAY_SIZE(stats)) 143 144 /** 145 * iavf_add_queue_stats - copy queue statistics into supplied buffer 146 * @data: ethtool stats buffer 147 * @ring: the ring to copy 148 * 149 * Queue statistics must be copied while protected by 150 * u64_stats_fetch_begin_irq, so we can't directly use iavf_add_ethtool_stats. 151 * Assumes that queue stats are defined in iavf_gstrings_queue_stats. If the 152 * ring pointer is null, zero out the queue stat values and update the data 153 * pointer. Otherwise safely copy the stats from the ring into the supplied 154 * buffer and update the data pointer when finished. 155 * 156 * This function expects to be called while under rcu_read_lock(). 157 **/ 158 static void 159 iavf_add_queue_stats(u64 **data, struct iavf_ring *ring) 160 { 161 const unsigned int size = ARRAY_SIZE(iavf_gstrings_queue_stats); 162 const struct iavf_stats *stats = iavf_gstrings_queue_stats; 163 unsigned int start; 164 unsigned int i; 165 166 /* To avoid invalid statistics values, ensure that we keep retrying 167 * the copy until we get a consistent value according to 168 * u64_stats_fetch_retry_irq. But first, make sure our ring is 169 * non-null before attempting to access its syncp. 170 */ 171 do { 172 start = !ring ? 0 : u64_stats_fetch_begin_irq(&ring->syncp); 173 for (i = 0; i < size; i++) 174 iavf_add_one_ethtool_stat(&(*data)[i], ring, &stats[i]); 175 } while (ring && u64_stats_fetch_retry_irq(&ring->syncp, start)); 176 177 /* Once we successfully copy the stats in, update the data pointer */ 178 *data += size; 179 } 180 181 /** 182 * __iavf_add_stat_strings - copy stat strings into ethtool buffer 183 * @p: ethtool supplied buffer 184 * @stats: stat definitions array 185 * @size: size of the stats array 186 * 187 * Format and copy the strings described by stats into the buffer pointed at 188 * by p. 189 **/ 190 static void __iavf_add_stat_strings(u8 **p, const struct iavf_stats stats[], 191 const unsigned int size, ...) 192 { 193 unsigned int i; 194 195 for (i = 0; i < size; i++) { 196 va_list args; 197 198 va_start(args, size); 199 vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args); 200 *p += ETH_GSTRING_LEN; 201 va_end(args); 202 } 203 } 204 205 /** 206 * iavf_add_stat_strings - copy stat strings into ethtool buffer 207 * @p: ethtool supplied buffer 208 * @stats: stat definitions array 209 * 210 * Format and copy the strings described by the const static stats value into 211 * the buffer pointed at by p. 212 * 213 * The parameter @stats is evaluated twice, so parameters with side effects 214 * should be avoided. Additionally, stats must be an array such that 215 * ARRAY_SIZE can be called on it. 216 **/ 217 #define iavf_add_stat_strings(p, stats, ...) \ 218 __iavf_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__) 219 220 #define VF_STAT(_name, _stat) \ 221 IAVF_STAT(struct iavf_adapter, _name, _stat) 222 223 static const struct iavf_stats iavf_gstrings_stats[] = { 224 VF_STAT("rx_bytes", current_stats.rx_bytes), 225 VF_STAT("rx_unicast", current_stats.rx_unicast), 226 VF_STAT("rx_multicast", current_stats.rx_multicast), 227 VF_STAT("rx_broadcast", current_stats.rx_broadcast), 228 VF_STAT("rx_discards", current_stats.rx_discards), 229 VF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol), 230 VF_STAT("tx_bytes", current_stats.tx_bytes), 231 VF_STAT("tx_unicast", current_stats.tx_unicast), 232 VF_STAT("tx_multicast", current_stats.tx_multicast), 233 VF_STAT("tx_broadcast", current_stats.tx_broadcast), 234 VF_STAT("tx_discards", current_stats.tx_discards), 235 VF_STAT("tx_errors", current_stats.tx_errors), 236 }; 237 238 #define IAVF_STATS_LEN ARRAY_SIZE(iavf_gstrings_stats) 239 240 #define IAVF_QUEUE_STATS_LEN ARRAY_SIZE(iavf_gstrings_queue_stats) 241 242 /* For now we have one and only one private flag and it is only defined 243 * when we have support for the SKIP_CPU_SYNC DMA attribute. Instead 244 * of leaving all this code sitting around empty we will strip it unless 245 * our one private flag is actually available. 246 */ 247 struct iavf_priv_flags { 248 char flag_string[ETH_GSTRING_LEN]; 249 u32 flag; 250 bool read_only; 251 }; 252 253 #define IAVF_PRIV_FLAG(_name, _flag, _read_only) { \ 254 .flag_string = _name, \ 255 .flag = _flag, \ 256 .read_only = _read_only, \ 257 } 258 259 static const struct iavf_priv_flags iavf_gstrings_priv_flags[] = { 260 IAVF_PRIV_FLAG("legacy-rx", IAVF_FLAG_LEGACY_RX, 0), 261 }; 262 263 #define IAVF_PRIV_FLAGS_STR_LEN ARRAY_SIZE(iavf_gstrings_priv_flags) 264 265 /** 266 * iavf_get_link_ksettings - Get Link Speed and Duplex settings 267 * @netdev: network interface device structure 268 * @cmd: ethtool command 269 * 270 * Reports speed/duplex settings. Because this is a VF, we don't know what 271 * kind of link we really have, so we fake it. 272 **/ 273 static int iavf_get_link_ksettings(struct net_device *netdev, 274 struct ethtool_link_ksettings *cmd) 275 { 276 struct iavf_adapter *adapter = netdev_priv(netdev); 277 278 ethtool_link_ksettings_zero_link_mode(cmd, supported); 279 cmd->base.autoneg = AUTONEG_DISABLE; 280 cmd->base.port = PORT_NONE; 281 cmd->base.duplex = DUPLEX_FULL; 282 283 if (ADV_LINK_SUPPORT(adapter)) { 284 if (adapter->link_speed_mbps && 285 adapter->link_speed_mbps < U32_MAX) 286 cmd->base.speed = adapter->link_speed_mbps; 287 else 288 cmd->base.speed = SPEED_UNKNOWN; 289 290 return 0; 291 } 292 293 switch (adapter->link_speed) { 294 case VIRTCHNL_LINK_SPEED_40GB: 295 cmd->base.speed = SPEED_40000; 296 break; 297 case VIRTCHNL_LINK_SPEED_25GB: 298 cmd->base.speed = SPEED_25000; 299 break; 300 case VIRTCHNL_LINK_SPEED_20GB: 301 cmd->base.speed = SPEED_20000; 302 break; 303 case VIRTCHNL_LINK_SPEED_10GB: 304 cmd->base.speed = SPEED_10000; 305 break; 306 case VIRTCHNL_LINK_SPEED_5GB: 307 cmd->base.speed = SPEED_5000; 308 break; 309 case VIRTCHNL_LINK_SPEED_2_5GB: 310 cmd->base.speed = SPEED_2500; 311 break; 312 case VIRTCHNL_LINK_SPEED_1GB: 313 cmd->base.speed = SPEED_1000; 314 break; 315 case VIRTCHNL_LINK_SPEED_100MB: 316 cmd->base.speed = SPEED_100; 317 break; 318 default: 319 break; 320 } 321 322 return 0; 323 } 324 325 /** 326 * iavf_get_sset_count - Get length of string set 327 * @netdev: network interface device structure 328 * @sset: id of string set 329 * 330 * Reports size of various string tables. 331 **/ 332 static int iavf_get_sset_count(struct net_device *netdev, int sset) 333 { 334 if (sset == ETH_SS_STATS) 335 return IAVF_STATS_LEN + 336 (IAVF_QUEUE_STATS_LEN * 2 * IAVF_MAX_REQ_QUEUES); 337 else if (sset == ETH_SS_PRIV_FLAGS) 338 return IAVF_PRIV_FLAGS_STR_LEN; 339 else 340 return -EINVAL; 341 } 342 343 /** 344 * iavf_get_ethtool_stats - report device statistics 345 * @netdev: network interface device structure 346 * @stats: ethtool statistics structure 347 * @data: pointer to data buffer 348 * 349 * All statistics are added to the data buffer as an array of u64. 350 **/ 351 static void iavf_get_ethtool_stats(struct net_device *netdev, 352 struct ethtool_stats *stats, u64 *data) 353 { 354 struct iavf_adapter *adapter = netdev_priv(netdev); 355 unsigned int i; 356 357 iavf_add_ethtool_stats(&data, adapter, iavf_gstrings_stats); 358 359 rcu_read_lock(); 360 for (i = 0; i < IAVF_MAX_REQ_QUEUES; i++) { 361 struct iavf_ring *ring; 362 363 /* Avoid accessing un-allocated queues */ 364 ring = (i < adapter->num_active_queues ? 365 &adapter->tx_rings[i] : NULL); 366 iavf_add_queue_stats(&data, ring); 367 368 /* Avoid accessing un-allocated queues */ 369 ring = (i < adapter->num_active_queues ? 370 &adapter->rx_rings[i] : NULL); 371 iavf_add_queue_stats(&data, ring); 372 } 373 rcu_read_unlock(); 374 } 375 376 /** 377 * iavf_get_priv_flag_strings - Get private flag strings 378 * @netdev: network interface device structure 379 * @data: buffer for string data 380 * 381 * Builds the private flags string table 382 **/ 383 static void iavf_get_priv_flag_strings(struct net_device *netdev, u8 *data) 384 { 385 unsigned int i; 386 387 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) { 388 snprintf(data, ETH_GSTRING_LEN, "%s", 389 iavf_gstrings_priv_flags[i].flag_string); 390 data += ETH_GSTRING_LEN; 391 } 392 } 393 394 /** 395 * iavf_get_stat_strings - Get stat strings 396 * @netdev: network interface device structure 397 * @data: buffer for string data 398 * 399 * Builds the statistics string table 400 **/ 401 static void iavf_get_stat_strings(struct net_device *netdev, u8 *data) 402 { 403 unsigned int i; 404 405 iavf_add_stat_strings(&data, iavf_gstrings_stats); 406 407 /* Queues are always allocated in pairs, so we just use num_tx_queues 408 * for both Tx and Rx queues. 409 */ 410 for (i = 0; i < netdev->num_tx_queues; i++) { 411 iavf_add_stat_strings(&data, iavf_gstrings_queue_stats, 412 "tx", i); 413 iavf_add_stat_strings(&data, iavf_gstrings_queue_stats, 414 "rx", i); 415 } 416 } 417 418 /** 419 * iavf_get_strings - Get string set 420 * @netdev: network interface device structure 421 * @sset: id of string set 422 * @data: buffer for string data 423 * 424 * Builds string tables for various string sets 425 **/ 426 static void iavf_get_strings(struct net_device *netdev, u32 sset, u8 *data) 427 { 428 switch (sset) { 429 case ETH_SS_STATS: 430 iavf_get_stat_strings(netdev, data); 431 break; 432 case ETH_SS_PRIV_FLAGS: 433 iavf_get_priv_flag_strings(netdev, data); 434 break; 435 default: 436 break; 437 } 438 } 439 440 /** 441 * iavf_get_priv_flags - report device private flags 442 * @netdev: network interface device structure 443 * 444 * The get string set count and the string set should be matched for each 445 * flag returned. Add new strings for each flag to the iavf_gstrings_priv_flags 446 * array. 447 * 448 * Returns a u32 bitmap of flags. 449 **/ 450 static u32 iavf_get_priv_flags(struct net_device *netdev) 451 { 452 struct iavf_adapter *adapter = netdev_priv(netdev); 453 u32 i, ret_flags = 0; 454 455 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) { 456 const struct iavf_priv_flags *priv_flags; 457 458 priv_flags = &iavf_gstrings_priv_flags[i]; 459 460 if (priv_flags->flag & adapter->flags) 461 ret_flags |= BIT(i); 462 } 463 464 return ret_flags; 465 } 466 467 /** 468 * iavf_set_priv_flags - set private flags 469 * @netdev: network interface device structure 470 * @flags: bit flags to be set 471 **/ 472 static int iavf_set_priv_flags(struct net_device *netdev, u32 flags) 473 { 474 struct iavf_adapter *adapter = netdev_priv(netdev); 475 u32 orig_flags, new_flags, changed_flags; 476 u32 i; 477 478 orig_flags = READ_ONCE(adapter->flags); 479 new_flags = orig_flags; 480 481 for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) { 482 const struct iavf_priv_flags *priv_flags; 483 484 priv_flags = &iavf_gstrings_priv_flags[i]; 485 486 if (flags & BIT(i)) 487 new_flags |= priv_flags->flag; 488 else 489 new_flags &= ~(priv_flags->flag); 490 491 if (priv_flags->read_only && 492 ((orig_flags ^ new_flags) & ~BIT(i))) 493 return -EOPNOTSUPP; 494 } 495 496 /* Before we finalize any flag changes, any checks which we need to 497 * perform to determine if the new flags will be supported should go 498 * here... 499 */ 500 501 /* Compare and exchange the new flags into place. If we failed, that 502 * is if cmpxchg returns anything but the old value, this means 503 * something else must have modified the flags variable since we 504 * copied it. We'll just punt with an error and log something in the 505 * message buffer. 506 */ 507 if (cmpxchg(&adapter->flags, orig_flags, new_flags) != orig_flags) { 508 dev_warn(&adapter->pdev->dev, 509 "Unable to update adapter->flags as it was modified by another thread...\n"); 510 return -EAGAIN; 511 } 512 513 changed_flags = orig_flags ^ new_flags; 514 515 /* Process any additional changes needed as a result of flag changes. 516 * The changed_flags value reflects the list of bits that were changed 517 * in the code above. 518 */ 519 520 /* issue a reset to force legacy-rx change to take effect */ 521 if (changed_flags & IAVF_FLAG_LEGACY_RX) { 522 if (netif_running(netdev)) { 523 adapter->flags |= IAVF_FLAG_RESET_NEEDED; 524 queue_work(iavf_wq, &adapter->reset_task); 525 } 526 } 527 528 return 0; 529 } 530 531 /** 532 * iavf_get_msglevel - Get debug message level 533 * @netdev: network interface device structure 534 * 535 * Returns current debug message level. 536 **/ 537 static u32 iavf_get_msglevel(struct net_device *netdev) 538 { 539 struct iavf_adapter *adapter = netdev_priv(netdev); 540 541 return adapter->msg_enable; 542 } 543 544 /** 545 * iavf_set_msglevel - Set debug message level 546 * @netdev: network interface device structure 547 * @data: message level 548 * 549 * Set current debug message level. Higher values cause the driver to 550 * be noisier. 551 **/ 552 static void iavf_set_msglevel(struct net_device *netdev, u32 data) 553 { 554 struct iavf_adapter *adapter = netdev_priv(netdev); 555 556 if (IAVF_DEBUG_USER & data) 557 adapter->hw.debug_mask = data; 558 adapter->msg_enable = data; 559 } 560 561 /** 562 * iavf_get_drvinfo - Get driver info 563 * @netdev: network interface device structure 564 * @drvinfo: ethool driver info structure 565 * 566 * Returns information about the driver and device for display to the user. 567 **/ 568 static void iavf_get_drvinfo(struct net_device *netdev, 569 struct ethtool_drvinfo *drvinfo) 570 { 571 struct iavf_adapter *adapter = netdev_priv(netdev); 572 573 strlcpy(drvinfo->driver, iavf_driver_name, 32); 574 strlcpy(drvinfo->fw_version, "N/A", 4); 575 strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32); 576 drvinfo->n_priv_flags = IAVF_PRIV_FLAGS_STR_LEN; 577 } 578 579 /** 580 * iavf_get_ringparam - Get ring parameters 581 * @netdev: network interface device structure 582 * @ring: ethtool ringparam structure 583 * 584 * Returns current ring parameters. TX and RX rings are reported separately, 585 * but the number of rings is not reported. 586 **/ 587 static void iavf_get_ringparam(struct net_device *netdev, 588 struct ethtool_ringparam *ring) 589 { 590 struct iavf_adapter *adapter = netdev_priv(netdev); 591 592 ring->rx_max_pending = IAVF_MAX_RXD; 593 ring->tx_max_pending = IAVF_MAX_TXD; 594 ring->rx_pending = adapter->rx_desc_count; 595 ring->tx_pending = adapter->tx_desc_count; 596 } 597 598 /** 599 * iavf_set_ringparam - Set ring parameters 600 * @netdev: network interface device structure 601 * @ring: ethtool ringparam structure 602 * 603 * Sets ring parameters. TX and RX rings are controlled separately, but the 604 * number of rings is not specified, so all rings get the same settings. 605 **/ 606 static int iavf_set_ringparam(struct net_device *netdev, 607 struct ethtool_ringparam *ring) 608 { 609 struct iavf_adapter *adapter = netdev_priv(netdev); 610 u32 new_rx_count, new_tx_count; 611 612 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending)) 613 return -EINVAL; 614 615 new_tx_count = clamp_t(u32, ring->tx_pending, 616 IAVF_MIN_TXD, 617 IAVF_MAX_TXD); 618 new_tx_count = ALIGN(new_tx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE); 619 620 new_rx_count = clamp_t(u32, ring->rx_pending, 621 IAVF_MIN_RXD, 622 IAVF_MAX_RXD); 623 new_rx_count = ALIGN(new_rx_count, IAVF_REQ_DESCRIPTOR_MULTIPLE); 624 625 /* if nothing to do return success */ 626 if ((new_tx_count == adapter->tx_desc_count) && 627 (new_rx_count == adapter->rx_desc_count)) 628 return 0; 629 630 adapter->tx_desc_count = new_tx_count; 631 adapter->rx_desc_count = new_rx_count; 632 633 if (netif_running(netdev)) { 634 adapter->flags |= IAVF_FLAG_RESET_NEEDED; 635 queue_work(iavf_wq, &adapter->reset_task); 636 } 637 638 return 0; 639 } 640 641 /** 642 * __iavf_get_coalesce - get per-queue coalesce settings 643 * @netdev: the netdev to check 644 * @ec: ethtool coalesce data structure 645 * @queue: which queue to pick 646 * 647 * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs 648 * are per queue. If queue is <0 then we default to queue 0 as the 649 * representative value. 650 **/ 651 static int __iavf_get_coalesce(struct net_device *netdev, 652 struct ethtool_coalesce *ec, int queue) 653 { 654 struct iavf_adapter *adapter = netdev_priv(netdev); 655 struct iavf_vsi *vsi = &adapter->vsi; 656 struct iavf_ring *rx_ring, *tx_ring; 657 658 ec->tx_max_coalesced_frames = vsi->work_limit; 659 ec->rx_max_coalesced_frames = vsi->work_limit; 660 661 /* Rx and Tx usecs per queue value. If user doesn't specify the 662 * queue, return queue 0's value to represent. 663 */ 664 if (queue < 0) 665 queue = 0; 666 else if (queue >= adapter->num_active_queues) 667 return -EINVAL; 668 669 rx_ring = &adapter->rx_rings[queue]; 670 tx_ring = &adapter->tx_rings[queue]; 671 672 if (ITR_IS_DYNAMIC(rx_ring->itr_setting)) 673 ec->use_adaptive_rx_coalesce = 1; 674 675 if (ITR_IS_DYNAMIC(tx_ring->itr_setting)) 676 ec->use_adaptive_tx_coalesce = 1; 677 678 ec->rx_coalesce_usecs = rx_ring->itr_setting & ~IAVF_ITR_DYNAMIC; 679 ec->tx_coalesce_usecs = tx_ring->itr_setting & ~IAVF_ITR_DYNAMIC; 680 681 return 0; 682 } 683 684 /** 685 * iavf_get_coalesce - Get interrupt coalescing settings 686 * @netdev: network interface device structure 687 * @ec: ethtool coalesce structure 688 * 689 * Returns current coalescing settings. This is referred to elsewhere in the 690 * driver as Interrupt Throttle Rate, as this is how the hardware describes 691 * this functionality. Note that if per-queue settings have been modified this 692 * only represents the settings of queue 0. 693 **/ 694 static int iavf_get_coalesce(struct net_device *netdev, 695 struct ethtool_coalesce *ec) 696 { 697 return __iavf_get_coalesce(netdev, ec, -1); 698 } 699 700 /** 701 * iavf_get_per_queue_coalesce - get coalesce values for specific queue 702 * @netdev: netdev to read 703 * @ec: coalesce settings from ethtool 704 * @queue: the queue to read 705 * 706 * Read specific queue's coalesce settings. 707 **/ 708 static int iavf_get_per_queue_coalesce(struct net_device *netdev, u32 queue, 709 struct ethtool_coalesce *ec) 710 { 711 return __iavf_get_coalesce(netdev, ec, queue); 712 } 713 714 /** 715 * iavf_set_itr_per_queue - set ITR values for specific queue 716 * @adapter: the VF adapter struct to set values for 717 * @ec: coalesce settings from ethtool 718 * @queue: the queue to modify 719 * 720 * Change the ITR settings for a specific queue. 721 **/ 722 static void iavf_set_itr_per_queue(struct iavf_adapter *adapter, 723 struct ethtool_coalesce *ec, int queue) 724 { 725 struct iavf_ring *rx_ring = &adapter->rx_rings[queue]; 726 struct iavf_ring *tx_ring = &adapter->tx_rings[queue]; 727 struct iavf_q_vector *q_vector; 728 729 rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs); 730 tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs); 731 732 rx_ring->itr_setting |= IAVF_ITR_DYNAMIC; 733 if (!ec->use_adaptive_rx_coalesce) 734 rx_ring->itr_setting ^= IAVF_ITR_DYNAMIC; 735 736 tx_ring->itr_setting |= IAVF_ITR_DYNAMIC; 737 if (!ec->use_adaptive_tx_coalesce) 738 tx_ring->itr_setting ^= IAVF_ITR_DYNAMIC; 739 740 q_vector = rx_ring->q_vector; 741 q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting); 742 743 q_vector = tx_ring->q_vector; 744 q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting); 745 746 /* The interrupt handler itself will take care of programming 747 * the Tx and Rx ITR values based on the values we have entered 748 * into the q_vector, no need to write the values now. 749 */ 750 } 751 752 /** 753 * __iavf_set_coalesce - set coalesce settings for particular queue 754 * @netdev: the netdev to change 755 * @ec: ethtool coalesce settings 756 * @queue: the queue to change 757 * 758 * Sets the coalesce settings for a particular queue. 759 **/ 760 static int __iavf_set_coalesce(struct net_device *netdev, 761 struct ethtool_coalesce *ec, int queue) 762 { 763 struct iavf_adapter *adapter = netdev_priv(netdev); 764 struct iavf_vsi *vsi = &adapter->vsi; 765 int i; 766 767 if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq) 768 vsi->work_limit = ec->tx_max_coalesced_frames_irq; 769 770 if (ec->rx_coalesce_usecs == 0) { 771 if (ec->use_adaptive_rx_coalesce) 772 netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n"); 773 } else if ((ec->rx_coalesce_usecs < IAVF_MIN_ITR) || 774 (ec->rx_coalesce_usecs > IAVF_MAX_ITR)) { 775 netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n"); 776 return -EINVAL; 777 } else if (ec->tx_coalesce_usecs == 0) { 778 if (ec->use_adaptive_tx_coalesce) 779 netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n"); 780 } else if ((ec->tx_coalesce_usecs < IAVF_MIN_ITR) || 781 (ec->tx_coalesce_usecs > IAVF_MAX_ITR)) { 782 netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n"); 783 return -EINVAL; 784 } 785 786 /* Rx and Tx usecs has per queue value. If user doesn't specify the 787 * queue, apply to all queues. 788 */ 789 if (queue < 0) { 790 for (i = 0; i < adapter->num_active_queues; i++) 791 iavf_set_itr_per_queue(adapter, ec, i); 792 } else if (queue < adapter->num_active_queues) { 793 iavf_set_itr_per_queue(adapter, ec, queue); 794 } else { 795 netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n", 796 adapter->num_active_queues - 1); 797 return -EINVAL; 798 } 799 800 return 0; 801 } 802 803 /** 804 * iavf_set_coalesce - Set interrupt coalescing settings 805 * @netdev: network interface device structure 806 * @ec: ethtool coalesce structure 807 * 808 * Change current coalescing settings for every queue. 809 **/ 810 static int iavf_set_coalesce(struct net_device *netdev, 811 struct ethtool_coalesce *ec) 812 { 813 return __iavf_set_coalesce(netdev, ec, -1); 814 } 815 816 /** 817 * iavf_set_per_queue_coalesce - set specific queue's coalesce settings 818 * @netdev: the netdev to change 819 * @ec: ethtool's coalesce settings 820 * @queue: the queue to modify 821 * 822 * Modifies a specific queue's coalesce settings. 823 */ 824 static int iavf_set_per_queue_coalesce(struct net_device *netdev, u32 queue, 825 struct ethtool_coalesce *ec) 826 { 827 return __iavf_set_coalesce(netdev, ec, queue); 828 } 829 830 /** 831 * iavf_get_rxnfc - command to get RX flow classification rules 832 * @netdev: network interface device structure 833 * @cmd: ethtool rxnfc command 834 * @rule_locs: pointer to store rule locations 835 * 836 * Returns Success if the command is supported. 837 **/ 838 static int iavf_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd, 839 u32 *rule_locs) 840 { 841 struct iavf_adapter *adapter = netdev_priv(netdev); 842 int ret = -EOPNOTSUPP; 843 844 switch (cmd->cmd) { 845 case ETHTOOL_GRXRINGS: 846 cmd->data = adapter->num_active_queues; 847 ret = 0; 848 break; 849 case ETHTOOL_GRXFH: 850 netdev_info(netdev, 851 "RSS hash info is not available to vf, use pf.\n"); 852 break; 853 default: 854 break; 855 } 856 857 return ret; 858 } 859 /** 860 * iavf_get_channels: get the number of channels supported by the device 861 * @netdev: network interface device structure 862 * @ch: channel information structure 863 * 864 * For the purposes of our device, we only use combined channels, i.e. a tx/rx 865 * queue pair. Report one extra channel to match our "other" MSI-X vector. 866 **/ 867 static void iavf_get_channels(struct net_device *netdev, 868 struct ethtool_channels *ch) 869 { 870 struct iavf_adapter *adapter = netdev_priv(netdev); 871 872 /* Report maximum channels */ 873 ch->max_combined = adapter->vsi_res->num_queue_pairs; 874 875 ch->max_other = NONQ_VECS; 876 ch->other_count = NONQ_VECS; 877 878 ch->combined_count = adapter->num_active_queues; 879 } 880 881 /** 882 * iavf_set_channels: set the new channel count 883 * @netdev: network interface device structure 884 * @ch: channel information structure 885 * 886 * Negotiate a new number of channels with the PF then do a reset. During 887 * reset we'll realloc queues and fix the RSS table. Returns 0 on success, 888 * negative on failure. 889 **/ 890 static int iavf_set_channels(struct net_device *netdev, 891 struct ethtool_channels *ch) 892 { 893 struct iavf_adapter *adapter = netdev_priv(netdev); 894 u32 num_req = ch->combined_count; 895 896 if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) && 897 adapter->num_tc) { 898 dev_info(&adapter->pdev->dev, "Cannot set channels since ADq is enabled.\n"); 899 return -EINVAL; 900 } 901 902 /* All of these should have already been checked by ethtool before this 903 * even gets to us, but just to be sure. 904 */ 905 if (num_req > adapter->vsi_res->num_queue_pairs) 906 return -EINVAL; 907 908 if (num_req == adapter->num_active_queues) 909 return 0; 910 911 if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS) 912 return -EINVAL; 913 914 adapter->num_req_queues = num_req; 915 adapter->flags |= IAVF_FLAG_REINIT_ITR_NEEDED; 916 iavf_schedule_reset(adapter); 917 return 0; 918 } 919 920 /** 921 * iavf_get_rxfh_key_size - get the RSS hash key size 922 * @netdev: network interface device structure 923 * 924 * Returns the table size. 925 **/ 926 static u32 iavf_get_rxfh_key_size(struct net_device *netdev) 927 { 928 struct iavf_adapter *adapter = netdev_priv(netdev); 929 930 return adapter->rss_key_size; 931 } 932 933 /** 934 * iavf_get_rxfh_indir_size - get the rx flow hash indirection table size 935 * @netdev: network interface device structure 936 * 937 * Returns the table size. 938 **/ 939 static u32 iavf_get_rxfh_indir_size(struct net_device *netdev) 940 { 941 struct iavf_adapter *adapter = netdev_priv(netdev); 942 943 return adapter->rss_lut_size; 944 } 945 946 /** 947 * iavf_get_rxfh - get the rx flow hash indirection table 948 * @netdev: network interface device structure 949 * @indir: indirection table 950 * @key: hash key 951 * @hfunc: hash function in use 952 * 953 * Reads the indirection table directly from the hardware. Always returns 0. 954 **/ 955 static int iavf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, 956 u8 *hfunc) 957 { 958 struct iavf_adapter *adapter = netdev_priv(netdev); 959 u16 i; 960 961 if (hfunc) 962 *hfunc = ETH_RSS_HASH_TOP; 963 if (!indir) 964 return 0; 965 966 memcpy(key, adapter->rss_key, adapter->rss_key_size); 967 968 /* Each 32 bits pointed by 'indir' is stored with a lut entry */ 969 for (i = 0; i < adapter->rss_lut_size; i++) 970 indir[i] = (u32)adapter->rss_lut[i]; 971 972 return 0; 973 } 974 975 /** 976 * iavf_set_rxfh - set the rx flow hash indirection table 977 * @netdev: network interface device structure 978 * @indir: indirection table 979 * @key: hash key 980 * @hfunc: hash function to use 981 * 982 * Returns -EINVAL if the table specifies an inavlid queue id, otherwise 983 * returns 0 after programming the table. 984 **/ 985 static int iavf_set_rxfh(struct net_device *netdev, const u32 *indir, 986 const u8 *key, const u8 hfunc) 987 { 988 struct iavf_adapter *adapter = netdev_priv(netdev); 989 u16 i; 990 991 /* We do not allow change in unsupported parameters */ 992 if (key || 993 (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)) 994 return -EOPNOTSUPP; 995 if (!indir) 996 return 0; 997 998 if (key) 999 memcpy(adapter->rss_key, key, adapter->rss_key_size); 1000 1001 /* Each 32 bits pointed by 'indir' is stored with a lut entry */ 1002 for (i = 0; i < adapter->rss_lut_size; i++) 1003 adapter->rss_lut[i] = (u8)(indir[i]); 1004 1005 return iavf_config_rss(adapter); 1006 } 1007 1008 static const struct ethtool_ops iavf_ethtool_ops = { 1009 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 1010 ETHTOOL_COALESCE_MAX_FRAMES | 1011 ETHTOOL_COALESCE_MAX_FRAMES_IRQ | 1012 ETHTOOL_COALESCE_USE_ADAPTIVE, 1013 .get_drvinfo = iavf_get_drvinfo, 1014 .get_link = ethtool_op_get_link, 1015 .get_ringparam = iavf_get_ringparam, 1016 .set_ringparam = iavf_set_ringparam, 1017 .get_strings = iavf_get_strings, 1018 .get_ethtool_stats = iavf_get_ethtool_stats, 1019 .get_sset_count = iavf_get_sset_count, 1020 .get_priv_flags = iavf_get_priv_flags, 1021 .set_priv_flags = iavf_set_priv_flags, 1022 .get_msglevel = iavf_get_msglevel, 1023 .set_msglevel = iavf_set_msglevel, 1024 .get_coalesce = iavf_get_coalesce, 1025 .set_coalesce = iavf_set_coalesce, 1026 .get_per_queue_coalesce = iavf_get_per_queue_coalesce, 1027 .set_per_queue_coalesce = iavf_set_per_queue_coalesce, 1028 .get_rxnfc = iavf_get_rxnfc, 1029 .get_rxfh_indir_size = iavf_get_rxfh_indir_size, 1030 .get_rxfh = iavf_get_rxfh, 1031 .set_rxfh = iavf_set_rxfh, 1032 .get_channels = iavf_get_channels, 1033 .set_channels = iavf_set_channels, 1034 .get_rxfh_key_size = iavf_get_rxfh_key_size, 1035 .get_link_ksettings = iavf_get_link_ksettings, 1036 }; 1037 1038 /** 1039 * iavf_set_ethtool_ops - Initialize ethtool ops struct 1040 * @netdev: network interface device structure 1041 * 1042 * Sets ethtool ops struct in our netdev so that ethtool can call 1043 * our functions. 1044 **/ 1045 void iavf_set_ethtool_ops(struct net_device *netdev) 1046 { 1047 netdev->ethtool_ops = &iavf_ethtool_ops; 1048 } 1049