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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 1999 - 2018 Intel Corporation. */3 4/******************************************************************************5 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code6******************************************************************************/7 8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt9 10#include <linux/types.h>11#include <linux/bitops.h>12#include <linux/module.h>13#include <linux/pci.h>14#include <linux/netdevice.h>15#include <linux/vmalloc.h>16#include <linux/string.h>17#include <linux/in.h>18#include <linux/ip.h>19#include <linux/tcp.h>20#include <linux/sctp.h>21#include <linux/ipv6.h>22#include <linux/slab.h>23#include <net/checksum.h>24#include <net/ip6_checksum.h>25#include <linux/ethtool.h>26#include <linux/if.h>27#include <linux/if_vlan.h>28#include <linux/prefetch.h>29#include <net/mpls.h>30#include <linux/bpf.h>31#include <linux/bpf_trace.h>32#include <linux/atomic.h>33#include <net/xfrm.h>34 35#include "ixgbevf.h"36 37const char ixgbevf_driver_name[] = "ixgbevf";38static const char ixgbevf_driver_string[] =39 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";40 41static char ixgbevf_copyright[] =42 "Copyright (c) 2009 - 2018 Intel Corporation.";43 44static const struct ixgbevf_info *ixgbevf_info_tbl[] = {45 [board_82599_vf] = &ixgbevf_82599_vf_info,46 [board_82599_vf_hv] = &ixgbevf_82599_vf_hv_info,47 [board_X540_vf] = &ixgbevf_X540_vf_info,48 [board_X540_vf_hv] = &ixgbevf_X540_vf_hv_info,49 [board_X550_vf] = &ixgbevf_X550_vf_info,50 [board_X550_vf_hv] = &ixgbevf_X550_vf_hv_info,51 [board_X550EM_x_vf] = &ixgbevf_X550EM_x_vf_info,52 [board_X550EM_x_vf_hv] = &ixgbevf_X550EM_x_vf_hv_info,53 [board_x550em_a_vf] = &ixgbevf_x550em_a_vf_info,54};55 56/* ixgbevf_pci_tbl - PCI Device ID Table57 *58 * Wildcard entries (PCI_ANY_ID) should come last59 * Last entry must be all 0s60 *61 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,62 * Class, Class Mask, private data (not used) }63 */64static const struct pci_device_id ixgbevf_pci_tbl[] = {65 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },66 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },67 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },68 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },72 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf },74 /* required last entry */75 {0, }76};77MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);78 79MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");80MODULE_LICENSE("GPL v2");81 82#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)83static int debug = -1;84module_param(debug, int, 0);85MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");86 87static struct workqueue_struct *ixgbevf_wq;88 89static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)90{91 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&92 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&93 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))94 queue_work(ixgbevf_wq, &adapter->service_task);95}96 97static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)98{99 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));100 101 /* flush memory to make sure state is correct before next watchdog */102 smp_mb__before_atomic();103 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);104}105 106/* forward decls */107static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);108static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);109static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);110static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);111static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,112 struct ixgbevf_rx_buffer *old_buff);113 114static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)115{116 struct ixgbevf_adapter *adapter = hw->back;117 118 if (!hw->hw_addr)119 return;120 hw->hw_addr = NULL;121 dev_err(&adapter->pdev->dev, "Adapter removed\n");122 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))123 ixgbevf_service_event_schedule(adapter);124}125 126static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)127{128 u32 value;129 130 /* The following check not only optimizes a bit by not131 * performing a read on the status register when the132 * register just read was a status register read that133 * returned IXGBE_FAILED_READ_REG. It also blocks any134 * potential recursion.135 */136 if (reg == IXGBE_VFSTATUS) {137 ixgbevf_remove_adapter(hw);138 return;139 }140 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);141 if (value == IXGBE_FAILED_READ_REG)142 ixgbevf_remove_adapter(hw);143}144 145u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)146{147 u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);148 u32 value;149 150 if (IXGBE_REMOVED(reg_addr))151 return IXGBE_FAILED_READ_REG;152 value = readl(reg_addr + reg);153 if (unlikely(value == IXGBE_FAILED_READ_REG))154 ixgbevf_check_remove(hw, reg);155 return value;156}157 158/**159 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors160 * @adapter: pointer to adapter struct161 * @direction: 0 for Rx, 1 for Tx, -1 for other causes162 * @queue: queue to map the corresponding interrupt to163 * @msix_vector: the vector to map to the corresponding queue164 **/165static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,166 u8 queue, u8 msix_vector)167{168 u32 ivar, index;169 struct ixgbe_hw *hw = &adapter->hw;170 171 if (direction == -1) {172 /* other causes */173 msix_vector |= IXGBE_IVAR_ALLOC_VAL;174 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);175 ivar &= ~0xFF;176 ivar |= msix_vector;177 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);178 } else {179 /* Tx or Rx causes */180 msix_vector |= IXGBE_IVAR_ALLOC_VAL;181 index = ((16 * (queue & 1)) + (8 * direction));182 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));183 ivar &= ~(0xFF << index);184 ivar |= (msix_vector << index);185 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);186 }187}188 189static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)190{191 return ring->stats.packets;192}193 194static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)195{196 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);197 struct ixgbe_hw *hw = &adapter->hw;198 199 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));200 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));201 202 if (head != tail)203 return (head < tail) ?204 tail - head : (tail + ring->count - head);205 206 return 0;207}208 209static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)210{211 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);212 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;213 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);214 215 clear_check_for_tx_hang(tx_ring);216 217 /* Check for a hung queue, but be thorough. This verifies218 * that a transmit has been completed since the previous219 * check AND there is at least one packet pending. The220 * ARMED bit is set to indicate a potential hang.221 */222 if ((tx_done_old == tx_done) && tx_pending) {223 /* make sure it is true for two checks in a row */224 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,225 &tx_ring->state);226 }227 /* reset the countdown */228 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);229 230 /* update completed stats and continue */231 tx_ring->tx_stats.tx_done_old = tx_done;232 233 return false;234}235 236static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)237{238 /* Do the reset outside of interrupt context */239 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {240 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);241 ixgbevf_service_event_schedule(adapter);242 }243}244 245/**246 * ixgbevf_tx_timeout - Respond to a Tx Hang247 * @netdev: network interface device structure248 * @txqueue: transmit queue hanging (unused)249 **/250static void ixgbevf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)251{252 struct ixgbevf_adapter *adapter = netdev_priv(netdev);253 254 ixgbevf_tx_timeout_reset(adapter);255}256 257/**258 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes259 * @q_vector: board private structure260 * @tx_ring: tx ring to clean261 * @napi_budget: Used to determine if we are in netpoll262 **/263static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,264 struct ixgbevf_ring *tx_ring, int napi_budget)265{266 struct ixgbevf_adapter *adapter = q_vector->adapter;267 struct ixgbevf_tx_buffer *tx_buffer;268 union ixgbe_adv_tx_desc *tx_desc;269 unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;270 unsigned int budget = tx_ring->count / 2;271 unsigned int i = tx_ring->next_to_clean;272 273 if (test_bit(__IXGBEVF_DOWN, &adapter->state))274 return true;275 276 tx_buffer = &tx_ring->tx_buffer_info[i];277 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);278 i -= tx_ring->count;279 280 do {281 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;282 283 /* if next_to_watch is not set then there is no work pending */284 if (!eop_desc)285 break;286 287 /* prevent any other reads prior to eop_desc */288 smp_rmb();289 290 /* if DD is not set pending work has not been completed */291 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))292 break;293 294 /* clear next_to_watch to prevent false hangs */295 tx_buffer->next_to_watch = NULL;296 297 /* update the statistics for this packet */298 total_bytes += tx_buffer->bytecount;299 total_packets += tx_buffer->gso_segs;300 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)301 total_ipsec++;302 303 /* free the skb */304 if (ring_is_xdp(tx_ring))305 page_frag_free(tx_buffer->data);306 else307 napi_consume_skb(tx_buffer->skb, napi_budget);308 309 /* unmap skb header data */310 dma_unmap_single(tx_ring->dev,311 dma_unmap_addr(tx_buffer, dma),312 dma_unmap_len(tx_buffer, len),313 DMA_TO_DEVICE);314 315 /* clear tx_buffer data */316 dma_unmap_len_set(tx_buffer, len, 0);317 318 /* unmap remaining buffers */319 while (tx_desc != eop_desc) {320 tx_buffer++;321 tx_desc++;322 i++;323 if (unlikely(!i)) {324 i -= tx_ring->count;325 tx_buffer = tx_ring->tx_buffer_info;326 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);327 }328 329 /* unmap any remaining paged data */330 if (dma_unmap_len(tx_buffer, len)) {331 dma_unmap_page(tx_ring->dev,332 dma_unmap_addr(tx_buffer, dma),333 dma_unmap_len(tx_buffer, len),334 DMA_TO_DEVICE);335 dma_unmap_len_set(tx_buffer, len, 0);336 }337 }338 339 /* move us one more past the eop_desc for start of next pkt */340 tx_buffer++;341 tx_desc++;342 i++;343 if (unlikely(!i)) {344 i -= tx_ring->count;345 tx_buffer = tx_ring->tx_buffer_info;346 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);347 }348 349 /* issue prefetch for next Tx descriptor */350 prefetch(tx_desc);351 352 /* update budget accounting */353 budget--;354 } while (likely(budget));355 356 i += tx_ring->count;357 tx_ring->next_to_clean = i;358 u64_stats_update_begin(&tx_ring->syncp);359 tx_ring->stats.bytes += total_bytes;360 tx_ring->stats.packets += total_packets;361 u64_stats_update_end(&tx_ring->syncp);362 q_vector->tx.total_bytes += total_bytes;363 q_vector->tx.total_packets += total_packets;364 adapter->tx_ipsec += total_ipsec;365 366 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {367 struct ixgbe_hw *hw = &adapter->hw;368 union ixgbe_adv_tx_desc *eop_desc;369 370 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;371 372 pr_err("Detected Tx Unit Hang%s\n"373 " Tx Queue <%d>\n"374 " TDH, TDT <%x>, <%x>\n"375 " next_to_use <%x>\n"376 " next_to_clean <%x>\n"377 "tx_buffer_info[next_to_clean]\n"378 " next_to_watch <%p>\n"379 " eop_desc->wb.status <%x>\n"380 " time_stamp <%lx>\n"381 " jiffies <%lx>\n",382 ring_is_xdp(tx_ring) ? " XDP" : "",383 tx_ring->queue_index,384 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),385 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),386 tx_ring->next_to_use, i,387 eop_desc, (eop_desc ? eop_desc->wb.status : 0),388 tx_ring->tx_buffer_info[i].time_stamp, jiffies);389 390 if (!ring_is_xdp(tx_ring))391 netif_stop_subqueue(tx_ring->netdev,392 tx_ring->queue_index);393 394 /* schedule immediate reset if we believe we hung */395 ixgbevf_tx_timeout_reset(adapter);396 397 return true;398 }399 400 if (ring_is_xdp(tx_ring))401 return !!budget;402 403#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)404 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&405 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {406 /* Make sure that anybody stopping the queue after this407 * sees the new next_to_clean.408 */409 smp_mb();410 411 if (__netif_subqueue_stopped(tx_ring->netdev,412 tx_ring->queue_index) &&413 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {414 netif_wake_subqueue(tx_ring->netdev,415 tx_ring->queue_index);416 ++tx_ring->tx_stats.restart_queue;417 }418 }419 420 return !!budget;421}422 423/**424 * ixgbevf_rx_skb - Helper function to determine proper Rx method425 * @q_vector: structure containing interrupt and ring information426 * @skb: packet to send up427 **/428static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,429 struct sk_buff *skb)430{431 napi_gro_receive(&q_vector->napi, skb);432}433 434#define IXGBE_RSS_L4_TYPES_MASK \435 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \436 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \437 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \438 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))439 440static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,441 union ixgbe_adv_rx_desc *rx_desc,442 struct sk_buff *skb)443{444 u16 rss_type;445 446 if (!(ring->netdev->features & NETIF_F_RXHASH))447 return;448 449 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &450 IXGBE_RXDADV_RSSTYPE_MASK;451 452 if (!rss_type)453 return;454 455 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),456 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?457 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);458}459 460/**461 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum462 * @ring: structure containig ring specific data463 * @rx_desc: current Rx descriptor being processed464 * @skb: skb currently being received and modified465 **/466static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,467 union ixgbe_adv_rx_desc *rx_desc,468 struct sk_buff *skb)469{470 skb_checksum_none_assert(skb);471 472 /* Rx csum disabled */473 if (!(ring->netdev->features & NETIF_F_RXCSUM))474 return;475 476 /* if IP and error */477 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&478 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {479 ring->rx_stats.csum_err++;480 return;481 }482 483 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))484 return;485 486 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {487 ring->rx_stats.csum_err++;488 return;489 }490 491 /* It must be a TCP or UDP packet with a valid checksum */492 skb->ip_summed = CHECKSUM_UNNECESSARY;493}494 495/**496 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor497 * @rx_ring: rx descriptor ring packet is being transacted on498 * @rx_desc: pointer to the EOP Rx descriptor499 * @skb: pointer to current skb being populated500 *501 * This function checks the ring, descriptor, and packet information in502 * order to populate the checksum, VLAN, protocol, and other fields within503 * the skb.504 **/505static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,506 union ixgbe_adv_rx_desc *rx_desc,507 struct sk_buff *skb)508{509 ixgbevf_rx_hash(rx_ring, rx_desc, skb);510 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);511 512 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {513 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);514 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);515 516 if (test_bit(vid & VLAN_VID_MASK, active_vlans))517 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);518 }519 520 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))521 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);522 523 skb->protocol = eth_type_trans(skb, rx_ring->netdev);524}525 526static527struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,528 const unsigned int size)529{530 struct ixgbevf_rx_buffer *rx_buffer;531 532 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];533 prefetchw(rx_buffer->page);534 535 /* we are reusing so sync this buffer for CPU use */536 dma_sync_single_range_for_cpu(rx_ring->dev,537 rx_buffer->dma,538 rx_buffer->page_offset,539 size,540 DMA_FROM_DEVICE);541 542 rx_buffer->pagecnt_bias--;543 544 return rx_buffer;545}546 547static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,548 struct ixgbevf_rx_buffer *rx_buffer,549 struct sk_buff *skb)550{551 if (ixgbevf_can_reuse_rx_page(rx_buffer)) {552 /* hand second half of page back to the ring */553 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);554 } else {555 if (IS_ERR(skb))556 /* We are not reusing the buffer so unmap it and free557 * any references we are holding to it558 */559 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,560 ixgbevf_rx_pg_size(rx_ring),561 DMA_FROM_DEVICE,562 IXGBEVF_RX_DMA_ATTR);563 __page_frag_cache_drain(rx_buffer->page,564 rx_buffer->pagecnt_bias);565 }566 567 /* clear contents of rx_buffer */568 rx_buffer->page = NULL;569}570 571/**572 * ixgbevf_is_non_eop - process handling of non-EOP buffers573 * @rx_ring: Rx ring being processed574 * @rx_desc: Rx descriptor for current buffer575 *576 * This function updates next to clean. If the buffer is an EOP buffer577 * this function exits returning false, otherwise it will place the578 * sk_buff in the next buffer to be chained and return true indicating579 * that this is in fact a non-EOP buffer.580 **/581static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,582 union ixgbe_adv_rx_desc *rx_desc)583{584 u32 ntc = rx_ring->next_to_clean + 1;585 586 /* fetch, update, and store next to clean */587 ntc = (ntc < rx_ring->count) ? ntc : 0;588 rx_ring->next_to_clean = ntc;589 590 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));591 592 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))593 return false;594 595 return true;596}597 598static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)599{600 return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;601}602 603static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,604 struct ixgbevf_rx_buffer *bi)605{606 struct page *page = bi->page;607 dma_addr_t dma;608 609 /* since we are recycling buffers we should seldom need to alloc */610 if (likely(page))611 return true;612 613 /* alloc new page for storage */614 page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));615 if (unlikely(!page)) {616 rx_ring->rx_stats.alloc_rx_page_failed++;617 return false;618 }619 620 /* map page for use */621 dma = dma_map_page_attrs(rx_ring->dev, page, 0,622 ixgbevf_rx_pg_size(rx_ring),623 DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);624 625 /* if mapping failed free memory back to system since626 * there isn't much point in holding memory we can't use627 */628 if (dma_mapping_error(rx_ring->dev, dma)) {629 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));630 631 rx_ring->rx_stats.alloc_rx_page_failed++;632 return false;633 }634 635 bi->dma = dma;636 bi->page = page;637 bi->page_offset = ixgbevf_rx_offset(rx_ring);638 bi->pagecnt_bias = 1;639 rx_ring->rx_stats.alloc_rx_page++;640 641 return true;642}643 644/**645 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split646 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on647 * @cleaned_count: number of buffers to replace648 **/649static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,650 u16 cleaned_count)651{652 union ixgbe_adv_rx_desc *rx_desc;653 struct ixgbevf_rx_buffer *bi;654 unsigned int i = rx_ring->next_to_use;655 656 /* nothing to do or no valid netdev defined */657 if (!cleaned_count || !rx_ring->netdev)658 return;659 660 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);661 bi = &rx_ring->rx_buffer_info[i];662 i -= rx_ring->count;663 664 do {665 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))666 break;667 668 /* sync the buffer for use by the device */669 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,670 bi->page_offset,671 ixgbevf_rx_bufsz(rx_ring),672 DMA_FROM_DEVICE);673 674 /* Refresh the desc even if pkt_addr didn't change675 * because each write-back erases this info.676 */677 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);678 679 rx_desc++;680 bi++;681 i++;682 if (unlikely(!i)) {683 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);684 bi = rx_ring->rx_buffer_info;685 i -= rx_ring->count;686 }687 688 /* clear the length for the next_to_use descriptor */689 rx_desc->wb.upper.length = 0;690 691 cleaned_count--;692 } while (cleaned_count);693 694 i += rx_ring->count;695 696 if (rx_ring->next_to_use != i) {697 /* record the next descriptor to use */698 rx_ring->next_to_use = i;699 700 /* update next to alloc since we have filled the ring */701 rx_ring->next_to_alloc = i;702 703 /* Force memory writes to complete before letting h/w704 * know there are new descriptors to fetch. (Only705 * applicable for weak-ordered memory model archs,706 * such as IA-64).707 */708 wmb();709 ixgbevf_write_tail(rx_ring, i);710 }711}712 713/**714 * ixgbevf_cleanup_headers - Correct corrupted or empty headers715 * @rx_ring: rx descriptor ring packet is being transacted on716 * @rx_desc: pointer to the EOP Rx descriptor717 * @skb: pointer to current skb being fixed718 *719 * Check for corrupted packet headers caused by senders on the local L2720 * embedded NIC switch not setting up their Tx Descriptors right. These721 * should be very rare.722 *723 * Also address the case where we are pulling data in on pages only724 * and as such no data is present in the skb header.725 *726 * In addition if skb is not at least 60 bytes we need to pad it so that727 * it is large enough to qualify as a valid Ethernet frame.728 *729 * Returns true if an error was encountered and skb was freed.730 **/731static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,732 union ixgbe_adv_rx_desc *rx_desc,733 struct sk_buff *skb)734{735 /* XDP packets use error pointer so abort at this point */736 if (IS_ERR(skb))737 return true;738 739 /* verify that the packet does not have any known errors */740 if (unlikely(ixgbevf_test_staterr(rx_desc,741 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {742 struct net_device *netdev = rx_ring->netdev;743 744 if (!(netdev->features & NETIF_F_RXALL)) {745 dev_kfree_skb_any(skb);746 return true;747 }748 }749 750 /* if eth_skb_pad returns an error the skb was freed */751 if (eth_skb_pad(skb))752 return true;753 754 return false;755}756 757/**758 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring759 * @rx_ring: rx descriptor ring to store buffers on760 * @old_buff: donor buffer to have page reused761 *762 * Synchronizes page for reuse by the adapter763 **/764static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,765 struct ixgbevf_rx_buffer *old_buff)766{767 struct ixgbevf_rx_buffer *new_buff;768 u16 nta = rx_ring->next_to_alloc;769 770 new_buff = &rx_ring->rx_buffer_info[nta];771 772 /* update, and store next to alloc */773 nta++;774 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;775 776 /* transfer page from old buffer to new buffer */777 new_buff->page = old_buff->page;778 new_buff->dma = old_buff->dma;779 new_buff->page_offset = old_buff->page_offset;780 new_buff->pagecnt_bias = old_buff->pagecnt_bias;781}782 783static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)784{785 unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;786 struct page *page = rx_buffer->page;787 788 /* avoid re-using remote and pfmemalloc pages */789 if (!dev_page_is_reusable(page))790 return false;791 792#if (PAGE_SIZE < 8192)793 /* if we are only owner of page we can reuse it */794 if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))795 return false;796#else797#define IXGBEVF_LAST_OFFSET \798 (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)799 800 if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)801 return false;802 803#endif804 805 /* If we have drained the page fragment pool we need to update806 * the pagecnt_bias and page count so that we fully restock the807 * number of references the driver holds.808 */809 if (unlikely(!pagecnt_bias)) {810 page_ref_add(page, USHRT_MAX);811 rx_buffer->pagecnt_bias = USHRT_MAX;812 }813 814 return true;815}816 817/**818 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff819 * @rx_ring: rx descriptor ring to transact packets on820 * @rx_buffer: buffer containing page to add821 * @skb: sk_buff to place the data into822 * @size: size of buffer to be added823 *824 * This function will add the data contained in rx_buffer->page to the skb.825 **/826static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,827 struct ixgbevf_rx_buffer *rx_buffer,828 struct sk_buff *skb,829 unsigned int size)830{831#if (PAGE_SIZE < 8192)832 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;833#else834 unsigned int truesize = ring_uses_build_skb(rx_ring) ?835 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :836 SKB_DATA_ALIGN(size);837#endif838 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,839 rx_buffer->page_offset, size, truesize);840#if (PAGE_SIZE < 8192)841 rx_buffer->page_offset ^= truesize;842#else843 rx_buffer->page_offset += truesize;844#endif845}846 847static848struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,849 struct ixgbevf_rx_buffer *rx_buffer,850 struct xdp_buff *xdp,851 union ixgbe_adv_rx_desc *rx_desc)852{853 unsigned int size = xdp->data_end - xdp->data;854#if (PAGE_SIZE < 8192)855 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;856#else857 unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -858 xdp->data_hard_start);859#endif860 unsigned int headlen;861 struct sk_buff *skb;862 863 /* prefetch first cache line of first page */864 net_prefetch(xdp->data);865 866 /* Note, we get here by enabling legacy-rx via:867 *868 * ethtool --set-priv-flags <dev> legacy-rx on869 *870 * In this mode, we currently get 0 extra XDP headroom as871 * opposed to having legacy-rx off, where we process XDP872 * packets going to stack via ixgbevf_build_skb().873 *874 * For ixgbevf_construct_skb() mode it means that the875 * xdp->data_meta will always point to xdp->data, since876 * the helper cannot expand the head. Should this ever877 * changed in future for legacy-rx mode on, then lets also878 * add xdp->data_meta handling here.879 */880 881 /* allocate a skb to store the frags */882 skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);883 if (unlikely(!skb))884 return NULL;885 886 /* Determine available headroom for copy */887 headlen = size;888 if (headlen > IXGBEVF_RX_HDR_SIZE)889 headlen = eth_get_headlen(skb->dev, xdp->data,890 IXGBEVF_RX_HDR_SIZE);891 892 /* align pull length to size of long to optimize memcpy performance */893 memcpy(__skb_put(skb, headlen), xdp->data,894 ALIGN(headlen, sizeof(long)));895 896 /* update all of the pointers */897 size -= headlen;898 if (size) {899 skb_add_rx_frag(skb, 0, rx_buffer->page,900 (xdp->data + headlen) -901 page_address(rx_buffer->page),902 size, truesize);903#if (PAGE_SIZE < 8192)904 rx_buffer->page_offset ^= truesize;905#else906 rx_buffer->page_offset += truesize;907#endif908 } else {909 rx_buffer->pagecnt_bias++;910 }911 912 return skb;913}914 915static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,916 u32 qmask)917{918 struct ixgbe_hw *hw = &adapter->hw;919 920 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);921}922 923static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,924 struct ixgbevf_rx_buffer *rx_buffer,925 struct xdp_buff *xdp,926 union ixgbe_adv_rx_desc *rx_desc)927{928 unsigned int metasize = xdp->data - xdp->data_meta;929#if (PAGE_SIZE < 8192)930 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;931#else932 unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +933 SKB_DATA_ALIGN(xdp->data_end -934 xdp->data_hard_start);935#endif936 struct sk_buff *skb;937 938 /* Prefetch first cache line of first page. If xdp->data_meta939 * is unused, this points to xdp->data, otherwise, we likely940 * have a consumer accessing first few bytes of meta data,941 * and then actual data.942 */943 net_prefetch(xdp->data_meta);944 945 /* build an skb around the page buffer */946 skb = napi_build_skb(xdp->data_hard_start, truesize);947 if (unlikely(!skb))948 return NULL;949 950 /* update pointers within the skb to store the data */951 skb_reserve(skb, xdp->data - xdp->data_hard_start);952 __skb_put(skb, xdp->data_end - xdp->data);953 if (metasize)954 skb_metadata_set(skb, metasize);955 956 /* update buffer offset */957#if (PAGE_SIZE < 8192)958 rx_buffer->page_offset ^= truesize;959#else960 rx_buffer->page_offset += truesize;961#endif962 963 return skb;964}965 966#define IXGBEVF_XDP_PASS 0967#define IXGBEVF_XDP_CONSUMED 1968#define IXGBEVF_XDP_TX 2969 970static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,971 struct xdp_buff *xdp)972{973 struct ixgbevf_tx_buffer *tx_buffer;974 union ixgbe_adv_tx_desc *tx_desc;975 u32 len, cmd_type;976 dma_addr_t dma;977 u16 i;978 979 len = xdp->data_end - xdp->data;980 981 if (unlikely(!ixgbevf_desc_unused(ring)))982 return IXGBEVF_XDP_CONSUMED;983 984 dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);985 if (dma_mapping_error(ring->dev, dma))986 return IXGBEVF_XDP_CONSUMED;987 988 /* record the location of the first descriptor for this packet */989 i = ring->next_to_use;990 tx_buffer = &ring->tx_buffer_info[i];991 992 dma_unmap_len_set(tx_buffer, len, len);993 dma_unmap_addr_set(tx_buffer, dma, dma);994 tx_buffer->data = xdp->data;995 tx_buffer->bytecount = len;996 tx_buffer->gso_segs = 1;997 tx_buffer->protocol = 0;998 999 /* Populate minimal context descriptor that will provide for the1000 * fact that we are expected to process Ethernet frames.1001 */1002 if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {1003 struct ixgbe_adv_tx_context_desc *context_desc;1004 1005 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);1006 1007 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);1008 context_desc->vlan_macip_lens =1009 cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);1010 context_desc->fceof_saidx = 0;1011 context_desc->type_tucmd_mlhl =1012 cpu_to_le32(IXGBE_TXD_CMD_DEXT |1013 IXGBE_ADVTXD_DTYP_CTXT);1014 context_desc->mss_l4len_idx = 0;1015 1016 i = 1;1017 }1018 1019 /* put descriptor type bits */1020 cmd_type = IXGBE_ADVTXD_DTYP_DATA |1021 IXGBE_ADVTXD_DCMD_DEXT |1022 IXGBE_ADVTXD_DCMD_IFCS;1023 cmd_type |= len | IXGBE_TXD_CMD;1024 1025 tx_desc = IXGBEVF_TX_DESC(ring, i);1026 tx_desc->read.buffer_addr = cpu_to_le64(dma);1027 1028 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);1029 tx_desc->read.olinfo_status =1030 cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |1031 IXGBE_ADVTXD_CC);1032 1033 /* Avoid any potential race with cleanup */1034 smp_wmb();1035 1036 /* set next_to_watch value indicating a packet is present */1037 i++;1038 if (i == ring->count)1039 i = 0;1040 1041 tx_buffer->next_to_watch = tx_desc;1042 ring->next_to_use = i;1043 1044 return IXGBEVF_XDP_TX;1045}1046 1047static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,1048 struct ixgbevf_ring *rx_ring,1049 struct xdp_buff *xdp)1050{1051 int result = IXGBEVF_XDP_PASS;1052 struct ixgbevf_ring *xdp_ring;1053 struct bpf_prog *xdp_prog;1054 u32 act;1055 1056 xdp_prog = READ_ONCE(rx_ring->xdp_prog);1057 1058 if (!xdp_prog)1059 goto xdp_out;1060 1061 act = bpf_prog_run_xdp(xdp_prog, xdp);1062 switch (act) {1063 case XDP_PASS:1064 break;1065 case XDP_TX:1066 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];1067 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);1068 if (result == IXGBEVF_XDP_CONSUMED)1069 goto out_failure;1070 break;1071 default:1072 bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act);1073 fallthrough;1074 case XDP_ABORTED:1075out_failure:1076 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);1077 fallthrough; /* handle aborts by dropping packet */1078 case XDP_DROP:1079 result = IXGBEVF_XDP_CONSUMED;1080 break;1081 }1082xdp_out:1083 return ERR_PTR(-result);1084}1085 1086static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,1087 unsigned int size)1088{1089 unsigned int truesize;1090 1091#if (PAGE_SIZE < 8192)1092 truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */1093#else1094 truesize = ring_uses_build_skb(rx_ring) ?1095 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) +1096 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :1097 SKB_DATA_ALIGN(size);1098#endif1099 return truesize;1100}1101 1102static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,1103 struct ixgbevf_rx_buffer *rx_buffer,1104 unsigned int size)1105{1106 unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);1107 1108#if (PAGE_SIZE < 8192)1109 rx_buffer->page_offset ^= truesize;1110#else1111 rx_buffer->page_offset += truesize;1112#endif1113}1114 1115static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,1116 struct ixgbevf_ring *rx_ring,1117 int budget)1118{1119 unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;1120 struct ixgbevf_adapter *adapter = q_vector->adapter;1121 u16 cleaned_count = ixgbevf_desc_unused(rx_ring);1122 struct sk_buff *skb = rx_ring->skb;1123 bool xdp_xmit = false;1124 struct xdp_buff xdp;1125 1126 /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */1127#if (PAGE_SIZE < 8192)1128 frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0);1129#endif1130 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);1131 1132 while (likely(total_rx_packets < budget)) {1133 struct ixgbevf_rx_buffer *rx_buffer;1134 union ixgbe_adv_rx_desc *rx_desc;1135 unsigned int size;1136 1137 /* return some buffers to hardware, one at a time is too slow */1138 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {1139 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);1140 cleaned_count = 0;1141 }1142 1143 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);1144 size = le16_to_cpu(rx_desc->wb.upper.length);1145 if (!size)1146 break;1147 1148 /* This memory barrier is needed to keep us from reading1149 * any other fields out of the rx_desc until we know the1150 * RXD_STAT_DD bit is set1151 */1152 rmb();1153 1154 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);1155 1156 /* retrieve a buffer from the ring */1157 if (!skb) {1158 unsigned int offset = ixgbevf_rx_offset(rx_ring);1159 unsigned char *hard_start;1160 1161 hard_start = page_address(rx_buffer->page) +1162 rx_buffer->page_offset - offset;1163 xdp_prepare_buff(&xdp, hard_start, offset, size, true);1164#if (PAGE_SIZE > 4096)1165 /* At larger PAGE_SIZE, frame_sz depend on len size */1166 xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);1167#endif1168 skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);1169 }1170 1171 if (IS_ERR(skb)) {1172 if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {1173 xdp_xmit = true;1174 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,1175 size);1176 } else {1177 rx_buffer->pagecnt_bias++;1178 }1179 total_rx_packets++;1180 total_rx_bytes += size;1181 } else if (skb) {1182 ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);1183 } else if (ring_uses_build_skb(rx_ring)) {1184 skb = ixgbevf_build_skb(rx_ring, rx_buffer,1185 &xdp, rx_desc);1186 } else {1187 skb = ixgbevf_construct_skb(rx_ring, rx_buffer,1188 &xdp, rx_desc);1189 }1190 1191 /* exit if we failed to retrieve a buffer */1192 if (!skb) {1193 rx_ring->rx_stats.alloc_rx_buff_failed++;1194 rx_buffer->pagecnt_bias++;1195 break;1196 }1197 1198 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);1199 cleaned_count++;1200 1201 /* fetch next buffer in frame if non-eop */1202 if (ixgbevf_is_non_eop(rx_ring, rx_desc))1203 continue;1204 1205 /* verify the packet layout is correct */1206 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {1207 skb = NULL;1208 continue;1209 }1210 1211 /* probably a little skewed due to removing CRC */1212 total_rx_bytes += skb->len;1213 1214 /* Workaround hardware that can't do proper VEPA multicast1215 * source pruning.1216 */1217 if ((skb->pkt_type == PACKET_BROADCAST ||1218 skb->pkt_type == PACKET_MULTICAST) &&1219 ether_addr_equal(rx_ring->netdev->dev_addr,1220 eth_hdr(skb)->h_source)) {1221 dev_kfree_skb_irq(skb);1222 continue;1223 }1224 1225 /* populate checksum, VLAN, and protocol */1226 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);1227 1228 ixgbevf_rx_skb(q_vector, skb);1229 1230 /* reset skb pointer */1231 skb = NULL;1232 1233 /* update budget accounting */1234 total_rx_packets++;1235 }1236 1237 /* place incomplete frames back on ring for completion */1238 rx_ring->skb = skb;1239 1240 if (xdp_xmit) {1241 struct ixgbevf_ring *xdp_ring =1242 adapter->xdp_ring[rx_ring->queue_index];1243 1244 /* Force memory writes to complete before letting h/w1245 * know there are new descriptors to fetch.1246 */1247 wmb();1248 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);1249 }1250 1251 u64_stats_update_begin(&rx_ring->syncp);1252 rx_ring->stats.packets += total_rx_packets;1253 rx_ring->stats.bytes += total_rx_bytes;1254 u64_stats_update_end(&rx_ring->syncp);1255 q_vector->rx.total_packets += total_rx_packets;1256 q_vector->rx.total_bytes += total_rx_bytes;1257 1258 return total_rx_packets;1259}1260 1261/**1262 * ixgbevf_poll - NAPI polling calback1263 * @napi: napi struct with our devices info in it1264 * @budget: amount of work driver is allowed to do this pass, in packets1265 *1266 * This function will clean more than one or more rings associated with a1267 * q_vector.1268 **/1269static int ixgbevf_poll(struct napi_struct *napi, int budget)1270{1271 struct ixgbevf_q_vector *q_vector =1272 container_of(napi, struct ixgbevf_q_vector, napi);1273 struct ixgbevf_adapter *adapter = q_vector->adapter;1274 struct ixgbevf_ring *ring;1275 int per_ring_budget, work_done = 0;1276 bool clean_complete = true;1277 1278 ixgbevf_for_each_ring(ring, q_vector->tx) {1279 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))1280 clean_complete = false;1281 }1282 1283 if (budget <= 0)1284 return budget;1285 1286 /* attempt to distribute budget to each queue fairly, but don't allow1287 * the budget to go below 1 because we'll exit polling1288 */1289 if (q_vector->rx.count > 1)1290 per_ring_budget = max(budget/q_vector->rx.count, 1);1291 else1292 per_ring_budget = budget;1293 1294 ixgbevf_for_each_ring(ring, q_vector->rx) {1295 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,1296 per_ring_budget);1297 work_done += cleaned;1298 if (cleaned >= per_ring_budget)1299 clean_complete = false;1300 }1301 1302 /* If all work not completed, return budget and keep polling */1303 if (!clean_complete)1304 return budget;1305 1306 /* Exit the polling mode, but don't re-enable interrupts if stack might1307 * poll us due to busy-polling1308 */1309 if (likely(napi_complete_done(napi, work_done))) {1310 if (adapter->rx_itr_setting == 1)1311 ixgbevf_set_itr(q_vector);1312 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&1313 !test_bit(__IXGBEVF_REMOVING, &adapter->state))1314 ixgbevf_irq_enable_queues(adapter,1315 BIT(q_vector->v_idx));1316 }1317 1318 return min(work_done, budget - 1);1319}1320 1321/**1322 * ixgbevf_write_eitr - write VTEITR register in hardware specific way1323 * @q_vector: structure containing interrupt and ring information1324 **/1325void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)1326{1327 struct ixgbevf_adapter *adapter = q_vector->adapter;1328 struct ixgbe_hw *hw = &adapter->hw;1329 int v_idx = q_vector->v_idx;1330 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;1331 1332 /* set the WDIS bit to not clear the timer bits and cause an1333 * immediate assertion of the interrupt1334 */1335 itr_reg |= IXGBE_EITR_CNT_WDIS;1336 1337 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);1338}1339 1340/**1341 * ixgbevf_configure_msix - Configure MSI-X hardware1342 * @adapter: board private structure1343 *1344 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X1345 * interrupts.1346 **/1347static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)1348{1349 struct ixgbevf_q_vector *q_vector;1350 int q_vectors, v_idx;1351 1352 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;1353 adapter->eims_enable_mask = 0;1354 1355 /* Populate the IVAR table and set the ITR values to the1356 * corresponding register.1357 */1358 for (v_idx = 0; v_idx < q_vectors; v_idx++) {1359 struct ixgbevf_ring *ring;1360 1361 q_vector = adapter->q_vector[v_idx];1362 1363 ixgbevf_for_each_ring(ring, q_vector->rx)1364 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);1365 1366 ixgbevf_for_each_ring(ring, q_vector->tx)1367 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);1368 1369 if (q_vector->tx.ring && !q_vector->rx.ring) {1370 /* Tx only vector */1371 if (adapter->tx_itr_setting == 1)1372 q_vector->itr = IXGBE_12K_ITR;1373 else1374 q_vector->itr = adapter->tx_itr_setting;1375 } else {1376 /* Rx or Rx/Tx vector */1377 if (adapter->rx_itr_setting == 1)1378 q_vector->itr = IXGBE_20K_ITR;1379 else1380 q_vector->itr = adapter->rx_itr_setting;1381 }1382 1383 /* add q_vector eims value to global eims_enable_mask */1384 adapter->eims_enable_mask |= BIT(v_idx);1385 1386 ixgbevf_write_eitr(q_vector);1387 }1388 1389 ixgbevf_set_ivar(adapter, -1, 1, v_idx);1390 /* setup eims_other and add value to global eims_enable_mask */1391 adapter->eims_other = BIT(v_idx);1392 adapter->eims_enable_mask |= adapter->eims_other;1393}1394 1395enum latency_range {1396 lowest_latency = 0,1397 low_latency = 1,1398 bulk_latency = 2,1399 latency_invalid = 2551400};1401 1402/**1403 * ixgbevf_update_itr - update the dynamic ITR value based on statistics1404 * @q_vector: structure containing interrupt and ring information1405 * @ring_container: structure containing ring performance data1406 *1407 * Stores a new ITR value based on packets and byte1408 * counts during the last interrupt. The advantage of per interrupt1409 * computation is faster updates and more accurate ITR for the current1410 * traffic pattern. Constants in this function were computed1411 * based on theoretical maximum wire speed and thresholds were set based1412 * on testing data as well as attempting to minimize response time1413 * while increasing bulk throughput.1414 **/1415static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,1416 struct ixgbevf_ring_container *ring_container)1417{1418 int bytes = ring_container->total_bytes;1419 int packets = ring_container->total_packets;1420 u32 timepassed_us;1421 u64 bytes_perint;1422 u8 itr_setting = ring_container->itr;1423 1424 if (packets == 0)1425 return;1426 1427 /* simple throttle rate management1428 * 0-20MB/s lowest (100000 ints/s)1429 * 20-100MB/s low (20000 ints/s)1430 * 100-1249MB/s bulk (12000 ints/s)1431 */1432 /* what was last interrupt timeslice? */1433 timepassed_us = q_vector->itr >> 2;1434 if (timepassed_us == 0)1435 return;1436 1437 bytes_perint = bytes / timepassed_us; /* bytes/usec */1438 1439 switch (itr_setting) {1440 case lowest_latency:1441 if (bytes_perint > 10)1442 itr_setting = low_latency;1443 break;1444 case low_latency:1445 if (bytes_perint > 20)1446 itr_setting = bulk_latency;1447 else if (bytes_perint <= 10)1448 itr_setting = lowest_latency;1449 break;1450 case bulk_latency:1451 if (bytes_perint <= 20)1452 itr_setting = low_latency;1453 break;1454 }1455 1456 /* clear work counters since we have the values we need */1457 ring_container->total_bytes = 0;1458 ring_container->total_packets = 0;1459 1460 /* write updated itr to ring container */1461 ring_container->itr = itr_setting;1462}1463 1464static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)1465{1466 u32 new_itr = q_vector->itr;1467 u8 current_itr;1468 1469 ixgbevf_update_itr(q_vector, &q_vector->tx);1470 ixgbevf_update_itr(q_vector, &q_vector->rx);1471 1472 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);1473 1474 switch (current_itr) {1475 /* counts and packets in update_itr are dependent on these numbers */1476 case lowest_latency:1477 new_itr = IXGBE_100K_ITR;1478 break;1479 case low_latency:1480 new_itr = IXGBE_20K_ITR;1481 break;1482 case bulk_latency:1483 new_itr = IXGBE_12K_ITR;1484 break;1485 default:1486 break;1487 }1488 1489 if (new_itr != q_vector->itr) {1490 /* do an exponential smoothing */1491 new_itr = (10 * new_itr * q_vector->itr) /1492 ((9 * new_itr) + q_vector->itr);1493 1494 /* save the algorithm value here */1495 q_vector->itr = new_itr;1496 1497 ixgbevf_write_eitr(q_vector);1498 }1499}1500 1501static irqreturn_t ixgbevf_msix_other(int irq, void *data)1502{1503 struct ixgbevf_adapter *adapter = data;1504 struct ixgbe_hw *hw = &adapter->hw;1505 1506 hw->mac.get_link_status = 1;1507 1508 ixgbevf_service_event_schedule(adapter);1509 1510 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);1511 1512 return IRQ_HANDLED;1513}1514 1515/**1516 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)1517 * @irq: unused1518 * @data: pointer to our q_vector struct for this interrupt vector1519 **/1520static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)1521{1522 struct ixgbevf_q_vector *q_vector = data;1523 1524 /* EIAM disabled interrupts (on this vector) for us */1525 if (q_vector->rx.ring || q_vector->tx.ring)1526 napi_schedule_irqoff(&q_vector->napi);1527 1528 return IRQ_HANDLED;1529}1530 1531/**1532 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts1533 * @adapter: board private structure1534 *1535 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests1536 * interrupts from the kernel.1537 **/1538static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)1539{1540 struct net_device *netdev = adapter->netdev;1541 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;1542 unsigned int ri = 0, ti = 0;1543 int vector, err;1544 1545 for (vector = 0; vector < q_vectors; vector++) {1546 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];1547 struct msix_entry *entry = &adapter->msix_entries[vector];1548 1549 if (q_vector->tx.ring && q_vector->rx.ring) {1550 snprintf(q_vector->name, sizeof(q_vector->name),1551 "%s-TxRx-%u", netdev->name, ri++);1552 ti++;1553 } else if (q_vector->rx.ring) {1554 snprintf(q_vector->name, sizeof(q_vector->name),1555 "%s-rx-%u", netdev->name, ri++);1556 } else if (q_vector->tx.ring) {1557 snprintf(q_vector->name, sizeof(q_vector->name),1558 "%s-tx-%u", netdev->name, ti++);1559 } else {1560 /* skip this unused q_vector */1561 continue;1562 }1563 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,1564 q_vector->name, q_vector);1565 if (err) {1566 hw_dbg(&adapter->hw,1567 "request_irq failed for MSIX interrupt Error: %d\n",1568 err);1569 goto free_queue_irqs;1570 }1571 }1572 1573 err = request_irq(adapter->msix_entries[vector].vector,1574 &ixgbevf_msix_other, 0, netdev->name, adapter);1575 if (err) {1576 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",1577 err);1578 goto free_queue_irqs;1579 }1580 1581 return 0;1582 1583free_queue_irqs:1584 while (vector) {1585 vector--;1586 free_irq(adapter->msix_entries[vector].vector,1587 adapter->q_vector[vector]);1588 }1589 /* This failure is non-recoverable - it indicates the system is1590 * out of MSIX vector resources and the VF driver cannot run1591 * without them. Set the number of msix vectors to zero1592 * indicating that not enough can be allocated. The error1593 * will be returned to the user indicating device open failed.1594 * Any further attempts to force the driver to open will also1595 * fail. The only way to recover is to unload the driver and1596 * reload it again. If the system has recovered some MSIX1597 * vectors then it may succeed.1598 */1599 adapter->num_msix_vectors = 0;1600 return err;1601}1602 1603/**1604 * ixgbevf_request_irq - initialize interrupts1605 * @adapter: board private structure1606 *1607 * Attempts to configure interrupts using the best available1608 * capabilities of the hardware and kernel.1609 **/1610static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)1611{1612 int err = ixgbevf_request_msix_irqs(adapter);1613 1614 if (err)1615 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);1616 1617 return err;1618}1619 1620static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)1621{1622 int i, q_vectors;1623 1624 if (!adapter->msix_entries)1625 return;1626 1627 q_vectors = adapter->num_msix_vectors;1628 i = q_vectors - 1;1629 1630 free_irq(adapter->msix_entries[i].vector, adapter);1631 i--;1632 1633 for (; i >= 0; i--) {1634 /* free only the irqs that were actually requested */1635 if (!adapter->q_vector[i]->rx.ring &&1636 !adapter->q_vector[i]->tx.ring)1637 continue;1638 1639 free_irq(adapter->msix_entries[i].vector,1640 adapter->q_vector[i]);1641 }1642}1643 1644/**1645 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC1646 * @adapter: board private structure1647 **/1648static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)1649{1650 struct ixgbe_hw *hw = &adapter->hw;1651 int i;1652 1653 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);1654 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);1655 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);1656 1657 IXGBE_WRITE_FLUSH(hw);1658 1659 for (i = 0; i < adapter->num_msix_vectors; i++)1660 synchronize_irq(adapter->msix_entries[i].vector);1661}1662 1663/**1664 * ixgbevf_irq_enable - Enable default interrupt generation settings1665 * @adapter: board private structure1666 **/1667static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)1668{1669 struct ixgbe_hw *hw = &adapter->hw;1670 1671 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);1672 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);1673 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);1674}1675 1676/**1677 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset1678 * @adapter: board private structure1679 * @ring: structure containing ring specific data1680 *1681 * Configure the Tx descriptor ring after a reset.1682 **/1683static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,1684 struct ixgbevf_ring *ring)1685{1686 struct ixgbe_hw *hw = &adapter->hw;1687 u64 tdba = ring->dma;1688 int wait_loop = 10;1689 u32 txdctl = IXGBE_TXDCTL_ENABLE;1690 u8 reg_idx = ring->reg_idx;1691 1692 /* disable queue to avoid issues while updating state */1693 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);1694 IXGBE_WRITE_FLUSH(hw);1695 1696 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));1697 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);1698 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),1699 ring->count * sizeof(union ixgbe_adv_tx_desc));1700 1701 /* disable head writeback */1702 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);1703 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);1704 1705 /* enable relaxed ordering */1706 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),1707 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |1708 IXGBE_DCA_TXCTRL_DATA_RRO_EN));1709 1710 /* reset head and tail pointers */1711 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);1712 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);1713 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);1714 1715 /* reset ntu and ntc to place SW in sync with hardwdare */1716 ring->next_to_clean = 0;1717 ring->next_to_use = 0;1718 1719 /* In order to avoid issues WTHRESH + PTHRESH should always be equal1720 * to or less than the number of on chip descriptors, which is1721 * currently 40.1722 */1723 txdctl |= (8 << 16); /* WTHRESH = 8 */1724 1725 /* Setting PTHRESH to 32 both improves performance */1726 txdctl |= (1u << 8) | /* HTHRESH = 1 */1727 32; /* PTHRESH = 32 */1728 1729 /* reinitialize tx_buffer_info */1730 memset(ring->tx_buffer_info, 0,1731 sizeof(struct ixgbevf_tx_buffer) * ring->count);1732 1733 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);1734 clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);1735 1736 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);1737 1738 /* poll to verify queue is enabled */1739 do {1740 usleep_range(1000, 2000);1741 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));1742 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));1743 if (!wait_loop)1744 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);1745}1746 1747/**1748 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset1749 * @adapter: board private structure1750 *1751 * Configure the Tx unit of the MAC after a reset.1752 **/1753static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)1754{1755 u32 i;1756 1757 /* Setup the HW Tx Head and Tail descriptor pointers */1758 for (i = 0; i < adapter->num_tx_queues; i++)1759 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);1760 for (i = 0; i < adapter->num_xdp_queues; i++)1761 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);1762}1763 1764#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 21765 1766static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,1767 struct ixgbevf_ring *ring, int index)1768{1769 struct ixgbe_hw *hw = &adapter->hw;1770 u32 srrctl;1771 1772 srrctl = IXGBE_SRRCTL_DROP_EN;1773 1774 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;1775 if (ring_uses_large_buffer(ring))1776 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;1777 else1778 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;1779 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;1780 1781 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);1782}1783 1784static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)1785{1786 struct ixgbe_hw *hw = &adapter->hw;1787 1788 /* PSRTYPE must be initialized in 82599 */1789 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |1790 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |1791 IXGBE_PSRTYPE_L2HDR;1792 1793 if (adapter->num_rx_queues > 1)1794 psrtype |= BIT(29);1795 1796 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);1797}1798 1799#define IXGBEVF_MAX_RX_DESC_POLL 101800static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,1801 struct ixgbevf_ring *ring)1802{1803 struct ixgbe_hw *hw = &adapter->hw;1804 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;1805 u32 rxdctl;1806 u8 reg_idx = ring->reg_idx;1807 1808 if (IXGBE_REMOVED(hw->hw_addr))1809 return;1810 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));1811 rxdctl &= ~IXGBE_RXDCTL_ENABLE;1812 1813 /* write value back with RXDCTL.ENABLE bit cleared */1814 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);1815 1816 /* the hardware may take up to 100us to really disable the Rx queue */1817 do {1818 udelay(10);1819 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));1820 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));1821 1822 if (!wait_loop)1823 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",1824 reg_idx);1825}1826 1827static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,1828 struct ixgbevf_ring *ring)1829{1830 struct ixgbe_hw *hw = &adapter->hw;1831 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;1832 u32 rxdctl;1833 u8 reg_idx = ring->reg_idx;1834 1835 if (IXGBE_REMOVED(hw->hw_addr))1836 return;1837 do {1838 usleep_range(1000, 2000);1839 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));1840 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));1841 1842 if (!wait_loop)1843 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",1844 reg_idx);1845}1846 1847/**1848 * ixgbevf_init_rss_key - Initialize adapter RSS key1849 * @adapter: device handle1850 *1851 * Allocates and initializes the RSS key if it is not allocated.1852 **/1853static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)1854{1855 u32 *rss_key;1856 1857 if (!adapter->rss_key) {1858 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);1859 if (unlikely(!rss_key))1860 return -ENOMEM;1861 1862 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);1863 adapter->rss_key = rss_key;1864 }1865 1866 return 0;1867}1868 1869static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)1870{1871 struct ixgbe_hw *hw = &adapter->hw;1872 u32 vfmrqc = 0, vfreta = 0;1873 u16 rss_i = adapter->num_rx_queues;1874 u8 i, j;1875 1876 /* Fill out hash function seeds */1877 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)1878 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));1879 1880 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {1881 if (j == rss_i)1882 j = 0;1883 1884 adapter->rss_indir_tbl[i] = j;1885 1886 vfreta |= j << (i & 0x3) * 8;1887 if ((i & 3) == 3) {1888 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);1889 vfreta = 0;1890 }1891 }1892 1893 /* Perform hash on these packet types */1894 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |1895 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |1896 IXGBE_VFMRQC_RSS_FIELD_IPV6 |1897 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;1898 1899 vfmrqc |= IXGBE_VFMRQC_RSSEN;1900 1901 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);1902}1903 1904static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,1905 struct ixgbevf_ring *ring)1906{1907 struct ixgbe_hw *hw = &adapter->hw;1908 union ixgbe_adv_rx_desc *rx_desc;1909 u64 rdba = ring->dma;1910 u32 rxdctl;1911 u8 reg_idx = ring->reg_idx;1912 1913 /* disable queue to avoid issues while updating state */1914 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));1915 ixgbevf_disable_rx_queue(adapter, ring);1916 1917 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));1918 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);1919 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),1920 ring->count * sizeof(union ixgbe_adv_rx_desc));1921 1922#ifndef CONFIG_SPARC1923 /* enable relaxed ordering */1924 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),1925 IXGBE_DCA_RXCTRL_DESC_RRO_EN);1926#else1927 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),1928 IXGBE_DCA_RXCTRL_DESC_RRO_EN |1929 IXGBE_DCA_RXCTRL_DATA_WRO_EN);1930#endif1931 1932 /* reset head and tail pointers */1933 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);1934 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);1935 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);1936 1937 /* initialize rx_buffer_info */1938 memset(ring->rx_buffer_info, 0,1939 sizeof(struct ixgbevf_rx_buffer) * ring->count);1940 1941 /* initialize Rx descriptor 0 */1942 rx_desc = IXGBEVF_RX_DESC(ring, 0);1943 rx_desc->wb.upper.length = 0;1944 1945 /* reset ntu and ntc to place SW in sync with hardwdare */1946 ring->next_to_clean = 0;1947 ring->next_to_use = 0;1948 ring->next_to_alloc = 0;1949 1950 ixgbevf_configure_srrctl(adapter, ring, reg_idx);1951 1952 /* RXDCTL.RLPML does not work on 82599 */1953 if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {1954 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |1955 IXGBE_RXDCTL_RLPML_EN);1956 1957#if (PAGE_SIZE < 8192)1958 /* Limit the maximum frame size so we don't overrun the skb */1959 if (ring_uses_build_skb(ring) &&1960 !ring_uses_large_buffer(ring))1961 rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |1962 IXGBE_RXDCTL_RLPML_EN;1963#endif1964 }1965 1966 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;1967 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);1968 1969 ixgbevf_rx_desc_queue_enable(adapter, ring);1970 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));1971}1972 1973static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,1974 struct ixgbevf_ring *rx_ring)1975{1976 struct net_device *netdev = adapter->netdev;1977 unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;1978 1979 /* set build_skb and buffer size flags */1980 clear_ring_build_skb_enabled(rx_ring);1981 clear_ring_uses_large_buffer(rx_ring);1982 1983 if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)1984 return;1985 1986 if (PAGE_SIZE < 8192)1987 if (max_frame > IXGBEVF_MAX_FRAME_BUILD_SKB)1988 set_ring_uses_large_buffer(rx_ring);1989 1990 /* 82599 can't rely on RXDCTL.RLPML to restrict the size of the frame */1991 if (adapter->hw.mac.type == ixgbe_mac_82599_vf && !ring_uses_large_buffer(rx_ring))1992 return;1993 1994 set_ring_build_skb_enabled(rx_ring);1995}1996 1997/**1998 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset1999 * @adapter: board private structure2000 *2001 * Configure the Rx unit of the MAC after a reset.2002 **/2003static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)2004{2005 struct ixgbe_hw *hw = &adapter->hw;2006 struct net_device *netdev = adapter->netdev;2007 int i, ret;2008 2009 ixgbevf_setup_psrtype(adapter);2010 if (hw->mac.type >= ixgbe_mac_X550_vf)2011 ixgbevf_setup_vfmrqc(adapter);2012 2013 spin_lock_bh(&adapter->mbx_lock);2014 /* notify the PF of our intent to use this size of frame */2015 ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);2016 spin_unlock_bh(&adapter->mbx_lock);2017 if (ret)2018 dev_err(&adapter->pdev->dev,2019 "Failed to set MTU at %d\n", netdev->mtu);2020 2021 /* Setup the HW Rx Head and Tail Descriptor Pointers and2022 * the Base and Length of the Rx Descriptor Ring2023 */2024 for (i = 0; i < adapter->num_rx_queues; i++) {2025 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];2026 2027 ixgbevf_set_rx_buffer_len(adapter, rx_ring);2028 ixgbevf_configure_rx_ring(adapter, rx_ring);2029 }2030}2031 2032static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,2033 __be16 proto, u16 vid)2034{2035 struct ixgbevf_adapter *adapter = netdev_priv(netdev);2036 struct ixgbe_hw *hw = &adapter->hw;2037 int err;2038 2039 spin_lock_bh(&adapter->mbx_lock);2040 2041 /* add VID to filter table */2042 err = hw->mac.ops.set_vfta(hw, vid, 0, true);2043 2044 spin_unlock_bh(&adapter->mbx_lock);2045 2046 if (err) {2047 netdev_err(netdev, "VF could not set VLAN %d\n", vid);2048 2049 /* translate error return types so error makes sense */2050 if (err == IXGBE_ERR_MBX)2051 return -EIO;2052 2053 if (err == IXGBE_ERR_INVALID_ARGUMENT)2054 return -EACCES;2055 }2056 2057 set_bit(vid, adapter->active_vlans);2058 2059 return err;2060}2061 2062static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,2063 __be16 proto, u16 vid)2064{2065 struct ixgbevf_adapter *adapter = netdev_priv(netdev);2066 struct ixgbe_hw *hw = &adapter->hw;2067 int err;2068 2069 spin_lock_bh(&adapter->mbx_lock);2070 2071 /* remove VID from filter table */2072 err = hw->mac.ops.set_vfta(hw, vid, 0, false);2073 2074 spin_unlock_bh(&adapter->mbx_lock);2075 2076 if (err)2077 netdev_err(netdev, "Could not remove VLAN %d\n", vid);2078 2079 clear_bit(vid, adapter->active_vlans);2080 2081 return err;2082}2083 2084static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)2085{2086 u16 vid;2087 2088 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)2089 ixgbevf_vlan_rx_add_vid(adapter->netdev,2090 htons(ETH_P_8021Q), vid);2091}2092 2093static int ixgbevf_write_uc_addr_list(struct net_device *netdev)2094{2095 struct ixgbevf_adapter *adapter = netdev_priv(netdev);2096 struct ixgbe_hw *hw = &adapter->hw;2097 int count = 0;2098 2099 if (!netdev_uc_empty(netdev)) {2100 struct netdev_hw_addr *ha;2101 2102 netdev_for_each_uc_addr(ha, netdev) {2103 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);2104 udelay(200);2105 }2106 } else {2107 /* If the list is empty then send message to PF driver to2108 * clear all MAC VLANs on this VF.2109 */2110 hw->mac.ops.set_uc_addr(hw, 0, NULL);2111 }2112 2113 return count;2114}2115 2116/**2117 * ixgbevf_set_rx_mode - Multicast and unicast set2118 * @netdev: network interface device structure2119 *2120 * The set_rx_method entry point is called whenever the multicast address2121 * list, unicast address list or the network interface flags are updated.2122 * This routine is responsible for configuring the hardware for proper2123 * multicast mode and configuring requested unicast filters.2124 **/2125static void ixgbevf_set_rx_mode(struct net_device *netdev)2126{2127 struct ixgbevf_adapter *adapter = netdev_priv(netdev);2128 struct ixgbe_hw *hw = &adapter->hw;2129 unsigned int flags = netdev->flags;2130 int xcast_mode;2131 2132 /* request the most inclusive mode we need */2133 if (flags & IFF_PROMISC)2134 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;2135 else if (flags & IFF_ALLMULTI)2136 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;2137 else if (flags & (IFF_BROADCAST | IFF_MULTICAST))2138 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;2139 else2140 xcast_mode = IXGBEVF_XCAST_MODE_NONE;2141 2142 spin_lock_bh(&adapter->mbx_lock);2143 2144 hw->mac.ops.update_xcast_mode(hw, xcast_mode);2145 2146 /* reprogram multicast list */2147 hw->mac.ops.update_mc_addr_list(hw, netdev);2148 2149 ixgbevf_write_uc_addr_list(netdev);2150 2151 spin_unlock_bh(&adapter->mbx_lock);2152}2153 2154static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)2155{2156 int q_idx;2157 struct ixgbevf_q_vector *q_vector;2158 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;2159 2160 for (q_idx = 0; q_idx < q_vectors; q_idx++) {2161 q_vector = adapter->q_vector[q_idx];2162 napi_enable(&q_vector->napi);2163 }2164}2165 2166static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)2167{2168 int q_idx;2169 struct ixgbevf_q_vector *q_vector;2170 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;2171 2172 for (q_idx = 0; q_idx < q_vectors; q_idx++) {2173 q_vector = adapter->q_vector[q_idx];2174 napi_disable(&q_vector->napi);2175 }2176}2177 2178static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)2179{2180 struct ixgbe_hw *hw = &adapter->hw;2181 unsigned int def_q = 0;2182 unsigned int num_tcs = 0;2183 unsigned int num_rx_queues = adapter->num_rx_queues;2184 unsigned int num_tx_queues = adapter->num_tx_queues;2185 int err;2186 2187 spin_lock_bh(&adapter->mbx_lock);2188 2189 /* fetch queue configuration from the PF */2190 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);2191 2192 spin_unlock_bh(&adapter->mbx_lock);2193 2194 if (err)2195 return err;2196 2197 if (num_tcs > 1) {2198 /* we need only one Tx queue */2199 num_tx_queues = 1;2200 2201 /* update default Tx ring register index */2202 adapter->tx_ring[0]->reg_idx = def_q;2203 2204 /* we need as many queues as traffic classes */2205 num_rx_queues = num_tcs;2206 }2207 2208 /* if we have a bad config abort request queue reset */2209 if ((adapter->num_rx_queues != num_rx_queues) ||2210 (adapter->num_tx_queues != num_tx_queues)) {2211 /* force mailbox timeout to prevent further messages */2212 hw->mbx.timeout = 0;2213 2214 /* wait for watchdog to come around and bail us out */2215 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);2216 }2217 2218 return 0;2219}2220 2221static void ixgbevf_configure(struct ixgbevf_adapter *adapter)2222{2223 ixgbevf_configure_dcb(adapter);2224 2225 ixgbevf_set_rx_mode(adapter->netdev);2226 2227 ixgbevf_restore_vlan(adapter);2228 ixgbevf_ipsec_restore(adapter);2229 2230 ixgbevf_configure_tx(adapter);2231 ixgbevf_configure_rx(adapter);2232}2233 2234static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)2235{2236 /* Only save pre-reset stats if there are some */2237 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {2238 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -2239 adapter->stats.base_vfgprc;2240 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -2241 adapter->stats.base_vfgptc;2242 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -2243 adapter->stats.base_vfgorc;2244 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -2245 adapter->stats.base_vfgotc;2246 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -2247 adapter->stats.base_vfmprc;2248 }2249}2250 2251static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)2252{2253 struct ixgbe_hw *hw = &adapter->hw;2254 2255 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);2256 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);2257 adapter->stats.last_vfgorc |=2258 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);2259 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);2260 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);2261 adapter->stats.last_vfgotc |=2262 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);2263 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);2264 2265 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;2266 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;2267 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;2268 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;2269 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;2270}2271 2272static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)2273{2274 struct ixgbe_hw *hw = &adapter->hw;2275 static const int api[] = {2276 ixgbe_mbox_api_15,2277 ixgbe_mbox_api_14,2278 ixgbe_mbox_api_13,2279 ixgbe_mbox_api_12,2280 ixgbe_mbox_api_11,2281 ixgbe_mbox_api_10,2282 ixgbe_mbox_api_unknown2283 };2284 int err, idx = 0;2285 2286 spin_lock_bh(&adapter->mbx_lock);2287 2288 while (api[idx] != ixgbe_mbox_api_unknown) {2289 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);2290 if (!err)2291 break;2292 idx++;2293 }2294 2295 if (hw->api_version >= ixgbe_mbox_api_15) {2296 hw->mbx.ops.init_params(hw);2297 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,2298 sizeof(struct ixgbe_mbx_operations));2299 }2300 2301 spin_unlock_bh(&adapter->mbx_lock);2302}2303 2304static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)2305{2306 struct net_device *netdev = adapter->netdev;2307 struct pci_dev *pdev = adapter->pdev;2308 struct ixgbe_hw *hw = &adapter->hw;2309 bool state;2310 2311 ixgbevf_configure_msix(adapter);2312 2313 spin_lock_bh(&adapter->mbx_lock);2314 2315 if (is_valid_ether_addr(hw->mac.addr))2316 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);2317 else2318 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);2319 2320 spin_unlock_bh(&adapter->mbx_lock);2321 2322 state = adapter->link_state;2323 hw->mac.ops.get_link_state(hw, &adapter->link_state);2324 if (state && state != adapter->link_state)2325 dev_info(&pdev->dev, "VF is administratively disabled\n");2326 2327 smp_mb__before_atomic();2328 clear_bit(__IXGBEVF_DOWN, &adapter->state);2329 ixgbevf_napi_enable_all(adapter);2330 2331 /* clear any pending interrupts, may auto mask */2332 IXGBE_READ_REG(hw, IXGBE_VTEICR);2333 ixgbevf_irq_enable(adapter);2334 2335 /* enable transmits */2336 netif_tx_start_all_queues(netdev);2337 2338 ixgbevf_save_reset_stats(adapter);2339 ixgbevf_init_last_counter_stats(adapter);2340 2341 hw->mac.get_link_status = 1;2342 mod_timer(&adapter->service_timer, jiffies);2343}2344 2345void ixgbevf_up(struct ixgbevf_adapter *adapter)2346{2347 ixgbevf_configure(adapter);2348 2349 ixgbevf_up_complete(adapter);2350}2351 2352/**2353 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue2354 * @rx_ring: ring to free buffers from2355 **/2356static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)2357{2358 u16 i = rx_ring->next_to_clean;2359 2360 /* Free Rx ring sk_buff */2361 if (rx_ring->skb) {2362 dev_kfree_skb(rx_ring->skb);2363 rx_ring->skb = NULL;2364 }2365 2366 /* Free all the Rx ring pages */2367 while (i != rx_ring->next_to_alloc) {2368 struct ixgbevf_rx_buffer *rx_buffer;2369 2370 rx_buffer = &rx_ring->rx_buffer_info[i];2371 2372 /* Invalidate cache lines that may have been written to by2373 * device so that we avoid corrupting memory.2374 */2375 dma_sync_single_range_for_cpu(rx_ring->dev,2376 rx_buffer->dma,2377 rx_buffer->page_offset,2378 ixgbevf_rx_bufsz(rx_ring),2379 DMA_FROM_DEVICE);2380 2381 /* free resources associated with mapping */2382 dma_unmap_page_attrs(rx_ring->dev,2383 rx_buffer->dma,2384 ixgbevf_rx_pg_size(rx_ring),2385 DMA_FROM_DEVICE,2386 IXGBEVF_RX_DMA_ATTR);2387 2388 __page_frag_cache_drain(rx_buffer->page,2389 rx_buffer->pagecnt_bias);2390 2391 i++;2392 if (i == rx_ring->count)2393 i = 0;2394 }2395 2396 rx_ring->next_to_alloc = 0;2397 rx_ring->next_to_clean = 0;2398 rx_ring->next_to_use = 0;2399}2400 2401/**2402 * ixgbevf_clean_tx_ring - Free Tx Buffers2403 * @tx_ring: ring to be cleaned2404 **/2405static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)2406{2407 u16 i = tx_ring->next_to_clean;2408 struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];2409 2410 while (i != tx_ring->next_to_use) {2411 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;2412 2413 /* Free all the Tx ring sk_buffs */2414 if (ring_is_xdp(tx_ring))2415 page_frag_free(tx_buffer->data);2416 else2417 dev_kfree_skb_any(tx_buffer->skb);2418 2419 /* unmap skb header data */2420 dma_unmap_single(tx_ring->dev,2421 dma_unmap_addr(tx_buffer, dma),2422 dma_unmap_len(tx_buffer, len),2423 DMA_TO_DEVICE);2424 2425 /* check for eop_desc to determine the end of the packet */2426 eop_desc = tx_buffer->next_to_watch;2427 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);2428 2429 /* unmap remaining buffers */2430 while (tx_desc != eop_desc) {2431 tx_buffer++;2432 tx_desc++;2433 i++;2434 if (unlikely(i == tx_ring->count)) {2435 i = 0;2436 tx_buffer = tx_ring->tx_buffer_info;2437 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);2438 }2439 2440 /* unmap any remaining paged data */2441 if (dma_unmap_len(tx_buffer, len))2442 dma_unmap_page(tx_ring->dev,2443 dma_unmap_addr(tx_buffer, dma),2444 dma_unmap_len(tx_buffer, len),2445 DMA_TO_DEVICE);2446 }2447 2448 /* move us one more past the eop_desc for start of next pkt */2449 tx_buffer++;2450 i++;2451 if (unlikely(i == tx_ring->count)) {2452 i = 0;2453 tx_buffer = tx_ring->tx_buffer_info;2454 }2455 }2456 2457 /* reset next_to_use and next_to_clean */2458 tx_ring->next_to_use = 0;2459 tx_ring->next_to_clean = 0;2460 2461}2462 2463/**2464 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues2465 * @adapter: board private structure2466 **/2467static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)2468{2469 int i;2470 2471 for (i = 0; i < adapter->num_rx_queues; i++)2472 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);2473}2474 2475/**2476 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues2477 * @adapter: board private structure2478 **/2479static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)2480{2481 int i;2482 2483 for (i = 0; i < adapter->num_tx_queues; i++)2484 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);2485 for (i = 0; i < adapter->num_xdp_queues; i++)2486 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);2487}2488 2489void ixgbevf_down(struct ixgbevf_adapter *adapter)2490{2491 struct net_device *netdev = adapter->netdev;2492 struct ixgbe_hw *hw = &adapter->hw;2493 int i;2494 2495 /* signal that we are down to the interrupt handler */2496 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))2497 return; /* do nothing if already down */2498 2499 /* disable all enabled Rx queues */2500 for (i = 0; i < adapter->num_rx_queues; i++)2501 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);2502 2503 usleep_range(10000, 20000);2504 2505 netif_tx_stop_all_queues(netdev);2506 2507 /* call carrier off first to avoid false dev_watchdog timeouts */2508 netif_carrier_off(netdev);2509 netif_tx_disable(netdev);2510 2511 ixgbevf_irq_disable(adapter);2512 2513 ixgbevf_napi_disable_all(adapter);2514 2515 del_timer_sync(&adapter->service_timer);2516 2517 /* disable transmits in the hardware now that interrupts are off */2518 for (i = 0; i < adapter->num_tx_queues; i++) {2519 u8 reg_idx = adapter->tx_ring[i]->reg_idx;2520 2521 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),2522 IXGBE_TXDCTL_SWFLSH);2523 }2524 2525 for (i = 0; i < adapter->num_xdp_queues; i++) {2526 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;2527 2528 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),2529 IXGBE_TXDCTL_SWFLSH);2530 }2531 2532 if (!pci_channel_offline(adapter->pdev))2533 ixgbevf_reset(adapter);2534 2535 ixgbevf_clean_all_tx_rings(adapter);2536 ixgbevf_clean_all_rx_rings(adapter);2537}2538 2539void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)2540{2541 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))2542 msleep(1);2543 2544 ixgbevf_down(adapter);2545 pci_set_master(adapter->pdev);2546 ixgbevf_up(adapter);2547 2548 clear_bit(__IXGBEVF_RESETTING, &adapter->state);2549}2550 2551void ixgbevf_reset(struct ixgbevf_adapter *adapter)2552{2553 struct ixgbe_hw *hw = &adapter->hw;2554 struct net_device *netdev = adapter->netdev;2555 2556 if (hw->mac.ops.reset_hw(hw)) {2557 hw_dbg(hw, "PF still resetting\n");2558 } else {2559 hw->mac.ops.init_hw(hw);2560 ixgbevf_negotiate_api(adapter);2561 }2562 2563 if (is_valid_ether_addr(adapter->hw.mac.addr)) {2564 eth_hw_addr_set(netdev, adapter->hw.mac.addr);2565 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);2566 }2567 2568 adapter->last_reset = jiffies;2569}2570 2571static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,2572 int vectors)2573{2574 int vector_threshold;2575 2576 /* We'll want at least 2 (vector_threshold):2577 * 1) TxQ[0] + RxQ[0] handler2578 * 2) Other (Link Status Change, etc.)2579 */2580 vector_threshold = MIN_MSIX_COUNT;2581 2582 /* The more we get, the more we will assign to Tx/Rx Cleanup2583 * for the separate queues...where Rx Cleanup >= Tx Cleanup.2584 * Right now, we simply care about how many we'll get; we'll2585 * set them up later while requesting irq's.2586 */2587 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,2588 vector_threshold, vectors);2589 2590 if (vectors < 0) {2591 dev_err(&adapter->pdev->dev,2592 "Unable to allocate MSI-X interrupts\n");2593 kfree(adapter->msix_entries);2594 adapter->msix_entries = NULL;2595 return vectors;2596 }2597 2598 /* Adjust for only the vectors we'll use, which is minimum2599 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of2600 * vectors we were allocated.2601 */2602 adapter->num_msix_vectors = vectors;2603 2604 return 0;2605}2606 2607/**2608 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent2609 * @adapter: board private structure to initialize2610 *2611 * This is the top level queue allocation routine. The order here is very2612 * important, starting with the "most" number of features turned on at once,2613 * and ending with the smallest set of features. This way large combinations2614 * can be allocated if they're turned on, and smaller combinations are the2615 * fall through conditions.2616 *2617 **/2618static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)2619{2620 struct ixgbe_hw *hw = &adapter->hw;2621 unsigned int def_q = 0;2622 unsigned int num_tcs = 0;2623 int err;2624 2625 /* Start with base case */2626 adapter->num_rx_queues = 1;2627 adapter->num_tx_queues = 1;2628 adapter->num_xdp_queues = 0;2629 2630 spin_lock_bh(&adapter->mbx_lock);2631 2632 /* fetch queue configuration from the PF */2633 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);2634 2635 spin_unlock_bh(&adapter->mbx_lock);2636 2637 if (err)2638 return;2639 2640 /* we need as many queues as traffic classes */2641 if (num_tcs > 1) {2642 adapter->num_rx_queues = num_tcs;2643 } else {2644 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);2645 2646 switch (hw->api_version) {2647 case ixgbe_mbox_api_11:2648 case ixgbe_mbox_api_12:2649 case ixgbe_mbox_api_13:2650 case ixgbe_mbox_api_14:2651 case ixgbe_mbox_api_15:2652 if (adapter->xdp_prog &&2653 hw->mac.max_tx_queues == rss)2654 rss = rss > 3 ? 2 : 1;2655 2656 adapter->num_rx_queues = rss;2657 adapter->num_tx_queues = rss;2658 adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;2659 break;2660 default:2661 break;2662 }2663 }2664}2665 2666/**2667 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported2668 * @adapter: board private structure to initialize2669 *2670 * Attempt to configure the interrupts using the best available2671 * capabilities of the hardware and the kernel.2672 **/2673static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)2674{2675 int vector, v_budget;2676 2677 /* It's easy to be greedy for MSI-X vectors, but it really2678 * doesn't do us much good if we have a lot more vectors2679 * than CPU's. So let's be conservative and only ask for2680 * (roughly) the same number of vectors as there are CPU's.2681 * The default is to use pairs of vectors.2682 */2683 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);2684 v_budget = min_t(int, v_budget, num_online_cpus());2685 v_budget += NON_Q_VECTORS;2686 2687 adapter->msix_entries = kcalloc(v_budget,2688 sizeof(struct msix_entry), GFP_KERNEL);2689 if (!adapter->msix_entries)2690 return -ENOMEM;2691 2692 for (vector = 0; vector < v_budget; vector++)2693 adapter->msix_entries[vector].entry = vector;2694 2695 /* A failure in MSI-X entry allocation isn't fatal, but the VF driver2696 * does not support any other modes, so we will simply fail here. Note2697 * that we clean up the msix_entries pointer else-where.2698 */2699 return ixgbevf_acquire_msix_vectors(adapter, v_budget);2700}2701 2702static void ixgbevf_add_ring(struct ixgbevf_ring *ring,2703 struct ixgbevf_ring_container *head)2704{2705 ring->next = head->ring;2706 head->ring = ring;2707 head->count++;2708}2709 2710/**2711 * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector2712 * @adapter: board private structure to initialize2713 * @v_idx: index of vector in adapter struct2714 * @txr_count: number of Tx rings for q vector2715 * @txr_idx: index of first Tx ring to assign2716 * @xdp_count: total number of XDP rings to allocate2717 * @xdp_idx: index of first XDP ring to allocate2718 * @rxr_count: number of Rx rings for q vector2719 * @rxr_idx: index of first Rx ring to assign2720 *2721 * We allocate one q_vector. If allocation fails we return -ENOMEM.2722 **/2723static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,2724 int txr_count, int txr_idx,2725 int xdp_count, int xdp_idx,2726 int rxr_count, int rxr_idx)2727{2728 struct ixgbevf_q_vector *q_vector;2729 int reg_idx = txr_idx + xdp_idx;2730 struct ixgbevf_ring *ring;2731 int ring_count, size;2732 2733 ring_count = txr_count + xdp_count + rxr_count;2734 size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);2735 2736 /* allocate q_vector and rings */2737 q_vector = kzalloc(size, GFP_KERNEL);2738 if (!q_vector)2739 return -ENOMEM;2740 2741 /* initialize NAPI */2742 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll);2743 2744 /* tie q_vector and adapter together */2745 adapter->q_vector[v_idx] = q_vector;2746 q_vector->adapter = adapter;2747 q_vector->v_idx = v_idx;2748 2749 /* initialize pointer to rings */2750 ring = q_vector->ring;2751 2752 while (txr_count) {2753 /* assign generic ring traits */2754 ring->dev = &adapter->pdev->dev;2755 ring->netdev = adapter->netdev;2756 2757 /* configure backlink on ring */2758 ring->q_vector = q_vector;2759 2760 /* update q_vector Tx values */2761 ixgbevf_add_ring(ring, &q_vector->tx);2762 2763 /* apply Tx specific ring traits */2764 ring->count = adapter->tx_ring_count;2765 ring->queue_index = txr_idx;2766 ring->reg_idx = reg_idx;2767 2768 /* assign ring to adapter */2769 adapter->tx_ring[txr_idx] = ring;2770 2771 /* update count and index */2772 txr_count--;2773 txr_idx++;2774 reg_idx++;2775 2776 /* push pointer to next ring */2777 ring++;2778 }2779 2780 while (xdp_count) {2781 /* assign generic ring traits */2782 ring->dev = &adapter->pdev->dev;2783 ring->netdev = adapter->netdev;2784 2785 /* configure backlink on ring */2786 ring->q_vector = q_vector;2787 2788 /* update q_vector Tx values */2789 ixgbevf_add_ring(ring, &q_vector->tx);2790 2791 /* apply Tx specific ring traits */2792 ring->count = adapter->tx_ring_count;2793 ring->queue_index = xdp_idx;2794 ring->reg_idx = reg_idx;2795 set_ring_xdp(ring);2796 2797 /* assign ring to adapter */2798 adapter->xdp_ring[xdp_idx] = ring;2799 2800 /* update count and index */2801 xdp_count--;2802 xdp_idx++;2803 reg_idx++;2804 2805 /* push pointer to next ring */2806 ring++;2807 }2808 2809 while (rxr_count) {2810 /* assign generic ring traits */2811 ring->dev = &adapter->pdev->dev;2812 ring->netdev = adapter->netdev;2813 2814 /* configure backlink on ring */2815 ring->q_vector = q_vector;2816 2817 /* update q_vector Rx values */2818 ixgbevf_add_ring(ring, &q_vector->rx);2819 2820 /* apply Rx specific ring traits */2821 ring->count = adapter->rx_ring_count;2822 ring->queue_index = rxr_idx;2823 ring->reg_idx = rxr_idx;2824 2825 /* assign ring to adapter */2826 adapter->rx_ring[rxr_idx] = ring;2827 2828 /* update count and index */2829 rxr_count--;2830 rxr_idx++;2831 2832 /* push pointer to next ring */2833 ring++;2834 }2835 2836 return 0;2837}2838 2839/**2840 * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector2841 * @adapter: board private structure to initialize2842 * @v_idx: index of vector in adapter struct2843 *2844 * This function frees the memory allocated to the q_vector. In addition if2845 * NAPI is enabled it will delete any references to the NAPI struct prior2846 * to freeing the q_vector.2847 **/2848static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)2849{2850 struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];2851 struct ixgbevf_ring *ring;2852 2853 ixgbevf_for_each_ring(ring, q_vector->tx) {2854 if (ring_is_xdp(ring))2855 adapter->xdp_ring[ring->queue_index] = NULL;2856 else2857 adapter->tx_ring[ring->queue_index] = NULL;2858 }2859 2860 ixgbevf_for_each_ring(ring, q_vector->rx)2861 adapter->rx_ring[ring->queue_index] = NULL;2862 2863 adapter->q_vector[v_idx] = NULL;2864 netif_napi_del(&q_vector->napi);2865 2866 /* ixgbevf_get_stats() might access the rings on this vector,2867 * we must wait a grace period before freeing it.2868 */2869 kfree_rcu(q_vector, rcu);2870}2871 2872/**2873 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors2874 * @adapter: board private structure to initialize2875 *2876 * We allocate one q_vector per queue interrupt. If allocation fails we2877 * return -ENOMEM.2878 **/2879static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)2880{2881 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;2882 int rxr_remaining = adapter->num_rx_queues;2883 int txr_remaining = adapter->num_tx_queues;2884 int xdp_remaining = adapter->num_xdp_queues;2885 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;2886 int err;2887 2888 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {2889 for (; rxr_remaining; v_idx++, q_vectors--) {2890 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);2891 2892 err = ixgbevf_alloc_q_vector(adapter, v_idx,2893 0, 0, 0, 0, rqpv, rxr_idx);2894 if (err)2895 goto err_out;2896 2897 /* update counts and index */2898 rxr_remaining -= rqpv;2899 rxr_idx += rqpv;2900 }2901 }2902 2903 for (; q_vectors; v_idx++, q_vectors--) {2904 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);2905 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);2906 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);2907 2908 err = ixgbevf_alloc_q_vector(adapter, v_idx,2909 tqpv, txr_idx,2910 xqpv, xdp_idx,2911 rqpv, rxr_idx);2912 2913 if (err)2914 goto err_out;2915 2916 /* update counts and index */2917 rxr_remaining -= rqpv;2918 rxr_idx += rqpv;2919 txr_remaining -= tqpv;2920 txr_idx += tqpv;2921 xdp_remaining -= xqpv;2922 xdp_idx += xqpv;2923 }2924 2925 return 0;2926 2927err_out:2928 while (v_idx) {2929 v_idx--;2930 ixgbevf_free_q_vector(adapter, v_idx);2931 }2932 2933 return -ENOMEM;2934}2935 2936/**2937 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors2938 * @adapter: board private structure to initialize2939 *2940 * This function frees the memory allocated to the q_vectors. In addition if2941 * NAPI is enabled it will delete any references to the NAPI struct prior2942 * to freeing the q_vector.2943 **/2944static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)2945{2946 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;2947 2948 while (q_vectors) {2949 q_vectors--;2950 ixgbevf_free_q_vector(adapter, q_vectors);2951 }2952}2953 2954/**2955 * ixgbevf_reset_interrupt_capability - Reset MSIX setup2956 * @adapter: board private structure2957 *2958 **/2959static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)2960{2961 if (!adapter->msix_entries)2962 return;2963 2964 pci_disable_msix(adapter->pdev);2965 kfree(adapter->msix_entries);2966 adapter->msix_entries = NULL;2967}2968 2969/**2970 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init2971 * @adapter: board private structure to initialize2972 *2973 **/2974static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)2975{2976 int err;2977 2978 /* Number of supported queues */2979 ixgbevf_set_num_queues(adapter);2980 2981 err = ixgbevf_set_interrupt_capability(adapter);2982 if (err) {2983 hw_dbg(&adapter->hw,2984 "Unable to setup interrupt capabilities\n");2985 goto err_set_interrupt;2986 }2987 2988 err = ixgbevf_alloc_q_vectors(adapter);2989 if (err) {2990 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");2991 goto err_alloc_q_vectors;2992 }2993 2994 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",2995 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",2996 adapter->num_rx_queues, adapter->num_tx_queues,2997 adapter->num_xdp_queues);2998 2999 set_bit(__IXGBEVF_DOWN, &adapter->state);3000 3001 return 0;3002err_alloc_q_vectors:3003 ixgbevf_reset_interrupt_capability(adapter);3004err_set_interrupt:3005 return err;3006}3007 3008/**3009 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings3010 * @adapter: board private structure to clear interrupt scheme on3011 *3012 * We go through and clear interrupt specific resources and reset the structure3013 * to pre-load conditions3014 **/3015static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)3016{3017 adapter->num_tx_queues = 0;3018 adapter->num_xdp_queues = 0;3019 adapter->num_rx_queues = 0;3020 3021 ixgbevf_free_q_vectors(adapter);3022 ixgbevf_reset_interrupt_capability(adapter);3023}3024 3025/**3026 * ixgbevf_sw_init - Initialize general software structures3027 * @adapter: board private structure to initialize3028 *3029 * ixgbevf_sw_init initializes the Adapter private data structure.3030 * Fields are initialized based on PCI device information and3031 * OS network device settings (MTU size).3032 **/3033static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)3034{3035 struct ixgbe_hw *hw = &adapter->hw;3036 struct pci_dev *pdev = adapter->pdev;3037 struct net_device *netdev = adapter->netdev;3038 int err;3039 3040 /* PCI config space info */3041 hw->vendor_id = pdev->vendor;3042 hw->device_id = pdev->device;3043 hw->revision_id = pdev->revision;3044 hw->subsystem_vendor_id = pdev->subsystem_vendor;3045 hw->subsystem_device_id = pdev->subsystem_device;3046 3047 hw->mbx.ops.init_params(hw);3048 3049 if (hw->mac.type >= ixgbe_mac_X550_vf) {3050 err = ixgbevf_init_rss_key(adapter);3051 if (err)3052 goto out;3053 }3054 3055 /* assume legacy case in which PF would only give VF 2 queues */3056 hw->mac.max_tx_queues = 2;3057 hw->mac.max_rx_queues = 2;3058 3059 /* lock to protect mailbox accesses */3060 spin_lock_init(&adapter->mbx_lock);3061 3062 err = hw->mac.ops.reset_hw(hw);3063 if (err) {3064 dev_info(&pdev->dev,3065 "PF still in reset state. Is the PF interface up?\n");3066 } else {3067 err = hw->mac.ops.init_hw(hw);3068 if (err) {3069 pr_err("init_shared_code failed: %d\n", err);3070 goto out;3071 }3072 ixgbevf_negotiate_api(adapter);3073 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);3074 if (err)3075 dev_info(&pdev->dev, "Error reading MAC address\n");3076 else if (is_zero_ether_addr(adapter->hw.mac.addr))3077 dev_info(&pdev->dev,3078 "MAC address not assigned by administrator.\n");3079 eth_hw_addr_set(netdev, hw->mac.addr);3080 }3081 3082 if (!is_valid_ether_addr(netdev->dev_addr)) {3083 dev_info(&pdev->dev, "Assigning random MAC address\n");3084 eth_hw_addr_random(netdev);3085 ether_addr_copy(hw->mac.addr, netdev->dev_addr);3086 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);3087 }3088 3089 /* Enable dynamic interrupt throttling rates */3090 adapter->rx_itr_setting = 1;3091 adapter->tx_itr_setting = 1;3092 3093 /* set default ring sizes */3094 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;3095 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;3096 3097 adapter->link_state = true;3098 3099 set_bit(__IXGBEVF_DOWN, &adapter->state);3100 return 0;3101 3102out:3103 return err;3104}3105 3106#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \3107 { \3108 u32 current_counter = IXGBE_READ_REG(hw, reg); \3109 if (current_counter < last_counter) \3110 counter += 0x100000000LL; \3111 last_counter = current_counter; \3112 counter &= 0xFFFFFFFF00000000LL; \3113 counter |= current_counter; \3114 }3115 3116#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \3117 { \3118 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \3119 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \3120 u64 current_counter = (current_counter_msb << 32) | \3121 current_counter_lsb; \3122 if (current_counter < last_counter) \3123 counter += 0x1000000000LL; \3124 last_counter = current_counter; \3125 counter &= 0xFFFFFFF000000000LL; \3126 counter |= current_counter; \3127 }3128/**3129 * ixgbevf_update_stats - Update the board statistics counters.3130 * @adapter: board private structure3131 **/3132void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)3133{3134 struct ixgbe_hw *hw = &adapter->hw;3135 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;3136 u64 alloc_rx_page = 0, hw_csum_rx_error = 0;3137 int i;3138 3139 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||3140 test_bit(__IXGBEVF_RESETTING, &adapter->state))3141 return;3142 3143 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,3144 adapter->stats.vfgprc);3145 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,3146 adapter->stats.vfgptc);3147 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,3148 adapter->stats.last_vfgorc,3149 adapter->stats.vfgorc);3150 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,3151 adapter->stats.last_vfgotc,3152 adapter->stats.vfgotc);3153 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,3154 adapter->stats.vfmprc);3155 3156 for (i = 0; i < adapter->num_rx_queues; i++) {3157 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];3158 3159 hw_csum_rx_error += rx_ring->rx_stats.csum_err;3160 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;3161 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;3162 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;3163 }3164 3165 adapter->hw_csum_rx_error = hw_csum_rx_error;3166 adapter->alloc_rx_page_failed = alloc_rx_page_failed;3167 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;3168 adapter->alloc_rx_page = alloc_rx_page;3169}3170 3171/**3172 * ixgbevf_service_timer - Timer Call-back3173 * @t: pointer to timer_list struct3174 **/3175static void ixgbevf_service_timer(struct timer_list *t)3176{3177 struct ixgbevf_adapter *adapter = from_timer(adapter, t,3178 service_timer);3179 3180 /* Reset the timer */3181 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);3182 3183 ixgbevf_service_event_schedule(adapter);3184}3185 3186static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)3187{3188 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))3189 return;3190 3191 rtnl_lock();3192 /* If we're already down or resetting, just bail */3193 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||3194 test_bit(__IXGBEVF_REMOVING, &adapter->state) ||3195 test_bit(__IXGBEVF_RESETTING, &adapter->state)) {3196 rtnl_unlock();3197 return;3198 }3199 3200 adapter->tx_timeout_count++;3201 3202 ixgbevf_reinit_locked(adapter);3203 rtnl_unlock();3204}3205 3206/**3207 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts3208 * @adapter: pointer to the device adapter structure3209 *3210 * This function serves two purposes. First it strobes the interrupt lines3211 * in order to make certain interrupts are occurring. Secondly it sets the3212 * bits needed to check for TX hangs. As a result we should immediately3213 * determine if a hang has occurred.3214 **/3215static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)3216{3217 struct ixgbe_hw *hw = &adapter->hw;3218 u32 eics = 0;3219 int i;3220 3221 /* If we're down or resetting, just bail */3222 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||3223 test_bit(__IXGBEVF_RESETTING, &adapter->state))3224 return;3225 3226 /* Force detection of hung controller */3227 if (netif_carrier_ok(adapter->netdev)) {3228 for (i = 0; i < adapter->num_tx_queues; i++)3229 set_check_for_tx_hang(adapter->tx_ring[i]);3230 for (i = 0; i < adapter->num_xdp_queues; i++)3231 set_check_for_tx_hang(adapter->xdp_ring[i]);3232 }3233 3234 /* get one bit for every active Tx/Rx interrupt vector */3235 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {3236 struct ixgbevf_q_vector *qv = adapter->q_vector[i];3237 3238 if (qv->rx.ring || qv->tx.ring)3239 eics |= BIT(i);3240 }3241 3242 /* Cause software interrupt to ensure rings are cleaned */3243 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);3244}3245 3246/**3247 * ixgbevf_watchdog_update_link - update the link status3248 * @adapter: pointer to the device adapter structure3249 **/3250static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)3251{3252 struct ixgbe_hw *hw = &adapter->hw;3253 u32 link_speed = adapter->link_speed;3254 bool link_up = adapter->link_up;3255 s32 err;3256 3257 spin_lock_bh(&adapter->mbx_lock);3258 3259 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);3260 3261 spin_unlock_bh(&adapter->mbx_lock);3262 3263 /* if check for link returns error we will need to reset */3264 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {3265 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);3266 link_up = false;3267 }3268 3269 adapter->link_up = link_up;3270 adapter->link_speed = link_speed;3271}3272 3273/**3274 * ixgbevf_watchdog_link_is_up - update netif_carrier status and3275 * print link up message3276 * @adapter: pointer to the device adapter structure3277 **/3278static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)3279{3280 struct net_device *netdev = adapter->netdev;3281 3282 /* only continue if link was previously down */3283 if (netif_carrier_ok(netdev))3284 return;3285 3286 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",3287 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?3288 "10 Gbps" :3289 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?3290 "1 Gbps" :3291 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?3292 "100 Mbps" :3293 "unknown speed");3294 3295 netif_carrier_on(netdev);3296}3297 3298/**3299 * ixgbevf_watchdog_link_is_down - update netif_carrier status and3300 * print link down message3301 * @adapter: pointer to the adapter structure3302 **/3303static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)3304{3305 struct net_device *netdev = adapter->netdev;3306 3307 adapter->link_speed = 0;3308 3309 /* only continue if link was up previously */3310 if (!netif_carrier_ok(netdev))3311 return;3312 3313 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");3314 3315 netif_carrier_off(netdev);3316}3317 3318/**3319 * ixgbevf_watchdog_subtask - worker thread to bring link up3320 * @adapter: board private structure3321 **/3322static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)3323{3324 /* if interface is down do nothing */3325 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||3326 test_bit(__IXGBEVF_RESETTING, &adapter->state))3327 return;3328 3329 ixgbevf_watchdog_update_link(adapter);3330 3331 if (adapter->link_up && adapter->link_state)3332 ixgbevf_watchdog_link_is_up(adapter);3333 else3334 ixgbevf_watchdog_link_is_down(adapter);3335 3336 ixgbevf_update_stats(adapter);3337}3338 3339/**3340 * ixgbevf_service_task - manages and runs subtasks3341 * @work: pointer to work_struct containing our data3342 **/3343static void ixgbevf_service_task(struct work_struct *work)3344{3345 struct ixgbevf_adapter *adapter = container_of(work,3346 struct ixgbevf_adapter,3347 service_task);3348 struct ixgbe_hw *hw = &adapter->hw;3349 3350 if (IXGBE_REMOVED(hw->hw_addr)) {3351 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {3352 rtnl_lock();3353 ixgbevf_down(adapter);3354 rtnl_unlock();3355 }3356 return;3357 }3358 3359 ixgbevf_queue_reset_subtask(adapter);3360 ixgbevf_reset_subtask(adapter);3361 ixgbevf_watchdog_subtask(adapter);3362 ixgbevf_check_hang_subtask(adapter);3363 3364 ixgbevf_service_event_complete(adapter);3365}3366 3367/**3368 * ixgbevf_free_tx_resources - Free Tx Resources per Queue3369 * @tx_ring: Tx descriptor ring for a specific queue3370 *3371 * Free all transmit software resources3372 **/3373void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)3374{3375 ixgbevf_clean_tx_ring(tx_ring);3376 3377 vfree(tx_ring->tx_buffer_info);3378 tx_ring->tx_buffer_info = NULL;3379 3380 /* if not set, then don't free */3381 if (!tx_ring->desc)3382 return;3383 3384 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,3385 tx_ring->dma);3386 3387 tx_ring->desc = NULL;3388}3389 3390/**3391 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues3392 * @adapter: board private structure3393 *3394 * Free all transmit software resources3395 **/3396static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)3397{3398 int i;3399 3400 for (i = 0; i < adapter->num_tx_queues; i++)3401 if (adapter->tx_ring[i]->desc)3402 ixgbevf_free_tx_resources(adapter->tx_ring[i]);3403 for (i = 0; i < adapter->num_xdp_queues; i++)3404 if (adapter->xdp_ring[i]->desc)3405 ixgbevf_free_tx_resources(adapter->xdp_ring[i]);3406}3407 3408/**3409 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)3410 * @tx_ring: Tx descriptor ring (for a specific queue) to setup3411 *3412 * Return 0 on success, negative on failure3413 **/3414int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)3415{3416 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);3417 int size;3418 3419 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;3420 tx_ring->tx_buffer_info = vmalloc(size);3421 if (!tx_ring->tx_buffer_info)3422 goto err;3423 3424 u64_stats_init(&tx_ring->syncp);3425 3426 /* round up to nearest 4K */3427 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);3428 tx_ring->size = ALIGN(tx_ring->size, 4096);3429 3430 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,3431 &tx_ring->dma, GFP_KERNEL);3432 if (!tx_ring->desc)3433 goto err;3434 3435 return 0;3436 3437err:3438 vfree(tx_ring->tx_buffer_info);3439 tx_ring->tx_buffer_info = NULL;3440 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");3441 return -ENOMEM;3442}3443 3444/**3445 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources3446 * @adapter: board private structure3447 *3448 * If this function returns with an error, then it's possible one or3449 * more of the rings is populated (while the rest are not). It is the3450 * callers duty to clean those orphaned rings.3451 *3452 * Return 0 on success, negative on failure3453 **/3454static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)3455{3456 int i, j = 0, err = 0;3457 3458 for (i = 0; i < adapter->num_tx_queues; i++) {3459 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);3460 if (!err)3461 continue;3462 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);3463 goto err_setup_tx;3464 }3465 3466 for (j = 0; j < adapter->num_xdp_queues; j++) {3467 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);3468 if (!err)3469 continue;3470 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);3471 goto err_setup_tx;3472 }3473 3474 return 0;3475err_setup_tx:3476 /* rewind the index freeing the rings as we go */3477 while (j--)3478 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);3479 while (i--)3480 ixgbevf_free_tx_resources(adapter->tx_ring[i]);3481 3482 return err;3483}3484 3485/**3486 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)3487 * @adapter: board private structure3488 * @rx_ring: Rx descriptor ring (for a specific queue) to setup3489 *3490 * Returns 0 on success, negative on failure3491 **/3492int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,3493 struct ixgbevf_ring *rx_ring)3494{3495 int size;3496 3497 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;3498 rx_ring->rx_buffer_info = vmalloc(size);3499 if (!rx_ring->rx_buffer_info)3500 goto err;3501 3502 u64_stats_init(&rx_ring->syncp);3503 3504 /* Round up to nearest 4K */3505 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);3506 rx_ring->size = ALIGN(rx_ring->size, 4096);3507 3508 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,3509 &rx_ring->dma, GFP_KERNEL);3510 3511 if (!rx_ring->desc)3512 goto err;3513 3514 /* XDP RX-queue info */3515 if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,3516 rx_ring->queue_index, 0) < 0)3517 goto err;3518 3519 rx_ring->xdp_prog = adapter->xdp_prog;3520 3521 return 0;3522err:3523 vfree(rx_ring->rx_buffer_info);3524 rx_ring->rx_buffer_info = NULL;3525 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");3526 return -ENOMEM;3527}3528 3529/**3530 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources3531 * @adapter: board private structure3532 *3533 * If this function returns with an error, then it's possible one or3534 * more of the rings is populated (while the rest are not). It is the3535 * callers duty to clean those orphaned rings.3536 *3537 * Return 0 on success, negative on failure3538 **/3539static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)3540{3541 int i, err = 0;3542 3543 for (i = 0; i < adapter->num_rx_queues; i++) {3544 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);3545 if (!err)3546 continue;3547 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);3548 goto err_setup_rx;3549 }3550 3551 return 0;3552err_setup_rx:3553 /* rewind the index freeing the rings as we go */3554 while (i--)3555 ixgbevf_free_rx_resources(adapter->rx_ring[i]);3556 return err;3557}3558 3559/**3560 * ixgbevf_free_rx_resources - Free Rx Resources3561 * @rx_ring: ring to clean the resources from3562 *3563 * Free all receive software resources3564 **/3565void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)3566{3567 ixgbevf_clean_rx_ring(rx_ring);3568 3569 rx_ring->xdp_prog = NULL;3570 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);3571 vfree(rx_ring->rx_buffer_info);3572 rx_ring->rx_buffer_info = NULL;3573 3574 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,3575 rx_ring->dma);3576 3577 rx_ring->desc = NULL;3578}3579 3580/**3581 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues3582 * @adapter: board private structure3583 *3584 * Free all receive software resources3585 **/3586static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)3587{3588 int i;3589 3590 for (i = 0; i < adapter->num_rx_queues; i++)3591 if (adapter->rx_ring[i]->desc)3592 ixgbevf_free_rx_resources(adapter->rx_ring[i]);3593}3594 3595/**3596 * ixgbevf_open - Called when a network interface is made active3597 * @netdev: network interface device structure3598 *3599 * Returns 0 on success, negative value on failure3600 *3601 * The open entry point is called when a network interface is made3602 * active by the system (IFF_UP). At this point all resources needed3603 * for transmit and receive operations are allocated, the interrupt3604 * handler is registered with the OS, the watchdog timer is started,3605 * and the stack is notified that the interface is ready.3606 **/3607int ixgbevf_open(struct net_device *netdev)3608{3609 struct ixgbevf_adapter *adapter = netdev_priv(netdev);3610 struct ixgbe_hw *hw = &adapter->hw;3611 int err;3612 3613 /* A previous failure to open the device because of a lack of3614 * available MSIX vector resources may have reset the number3615 * of msix vectors variable to zero. The only way to recover3616 * is to unload/reload the driver and hope that the system has3617 * been able to recover some MSIX vector resources.3618 */3619 if (!adapter->num_msix_vectors)3620 return -ENOMEM;3621 3622 if (hw->adapter_stopped) {3623 ixgbevf_reset(adapter);3624 /* if adapter is still stopped then PF isn't up and3625 * the VF can't start.3626 */3627 if (hw->adapter_stopped) {3628 err = IXGBE_ERR_MBX;3629 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");3630 goto err_setup_reset;3631 }3632 }3633 3634 /* disallow open during test */3635 if (test_bit(__IXGBEVF_TESTING, &adapter->state))3636 return -EBUSY;3637 3638 netif_carrier_off(netdev);3639 3640 /* allocate transmit descriptors */3641 err = ixgbevf_setup_all_tx_resources(adapter);3642 if (err)3643 goto err_setup_tx;3644 3645 /* allocate receive descriptors */3646 err = ixgbevf_setup_all_rx_resources(adapter);3647 if (err)3648 goto err_setup_rx;3649 3650 ixgbevf_configure(adapter);3651 3652 err = ixgbevf_request_irq(adapter);3653 if (err)3654 goto err_req_irq;3655 3656 /* Notify the stack of the actual queue counts. */3657 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);3658 if (err)3659 goto err_set_queues;3660 3661 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);3662 if (err)3663 goto err_set_queues;3664 3665 ixgbevf_up_complete(adapter);3666 3667 return 0;3668 3669err_set_queues:3670 ixgbevf_free_irq(adapter);3671err_req_irq:3672 ixgbevf_free_all_rx_resources(adapter);3673err_setup_rx:3674 ixgbevf_free_all_tx_resources(adapter);3675err_setup_tx:3676 ixgbevf_reset(adapter);3677err_setup_reset:3678 3679 return err;3680}3681 3682/**3683 * ixgbevf_close_suspend - actions necessary to both suspend and close flows3684 * @adapter: the private adapter struct3685 *3686 * This function should contain the necessary work common to both suspending3687 * and closing of the device.3688 */3689static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)3690{3691 ixgbevf_down(adapter);3692 ixgbevf_free_irq(adapter);3693 ixgbevf_free_all_tx_resources(adapter);3694 ixgbevf_free_all_rx_resources(adapter);3695}3696 3697/**3698 * ixgbevf_close - Disables a network interface3699 * @netdev: network interface device structure3700 *3701 * Returns 0, this is not allowed to fail3702 *3703 * The close entry point is called when an interface is de-activated3704 * by the OS. The hardware is still under the drivers control, but3705 * needs to be disabled. A global MAC reset is issued to stop the3706 * hardware, and all transmit and receive resources are freed.3707 **/3708int ixgbevf_close(struct net_device *netdev)3709{3710 struct ixgbevf_adapter *adapter = netdev_priv(netdev);3711 3712 if (netif_device_present(netdev))3713 ixgbevf_close_suspend(adapter);3714 3715 return 0;3716}3717 3718static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)3719{3720 struct net_device *dev = adapter->netdev;3721 3722 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,3723 &adapter->state))3724 return;3725 3726 /* if interface is down do nothing */3727 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||3728 test_bit(__IXGBEVF_RESETTING, &adapter->state))3729 return;3730 3731 /* Hardware has to reinitialize queues and interrupts to3732 * match packet buffer alignment. Unfortunately, the3733 * hardware is not flexible enough to do this dynamically.3734 */3735 rtnl_lock();3736 3737 if (netif_running(dev))3738 ixgbevf_close(dev);3739 3740 ixgbevf_clear_interrupt_scheme(adapter);3741 ixgbevf_init_interrupt_scheme(adapter);3742 3743 if (netif_running(dev))3744 ixgbevf_open(dev);3745 3746 rtnl_unlock();3747}3748 3749static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,3750 u32 vlan_macip_lens, u32 fceof_saidx,3751 u32 type_tucmd, u32 mss_l4len_idx)3752{3753 struct ixgbe_adv_tx_context_desc *context_desc;3754 u16 i = tx_ring->next_to_use;3755 3756 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);3757 3758 i++;3759 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;3760 3761 /* set bits to identify this as an advanced context descriptor */3762 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;3763 3764 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);3765 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx);3766 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);3767 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);3768}3769 3770static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,3771 struct ixgbevf_tx_buffer *first,3772 u8 *hdr_len,3773 struct ixgbevf_ipsec_tx_data *itd)3774{3775 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;3776 struct sk_buff *skb = first->skb;3777 union {3778 struct iphdr *v4;3779 struct ipv6hdr *v6;3780 unsigned char *hdr;3781 } ip;3782 union {3783 struct tcphdr *tcp;3784 unsigned char *hdr;3785 } l4;3786 u32 paylen, l4_offset;3787 u32 fceof_saidx = 0;3788 int err;3789 3790 if (skb->ip_summed != CHECKSUM_PARTIAL)3791 return 0;3792 3793 if (!skb_is_gso(skb))3794 return 0;3795 3796 err = skb_cow_head(skb, 0);3797 if (err < 0)3798 return err;3799 3800 if (eth_p_mpls(first->protocol))3801 ip.hdr = skb_inner_network_header(skb);3802 else3803 ip.hdr = skb_network_header(skb);3804 l4.hdr = skb_checksum_start(skb);3805 3806 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */3807 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;3808 3809 /* initialize outer IP header fields */3810 if (ip.v4->version == 4) {3811 unsigned char *csum_start = skb_checksum_start(skb);3812 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);3813 int len = csum_start - trans_start;3814 3815 /* IP header will have to cancel out any data that3816 * is not a part of the outer IP header, so set to3817 * a reverse csum if needed, else init check to 0.3818 */3819 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?3820 csum_fold(csum_partial(trans_start,3821 len, 0)) : 0;3822 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;3823 3824 ip.v4->tot_len = 0;3825 first->tx_flags |= IXGBE_TX_FLAGS_TSO |3826 IXGBE_TX_FLAGS_CSUM |3827 IXGBE_TX_FLAGS_IPV4;3828 } else {3829 ip.v6->payload_len = 0;3830 first->tx_flags |= IXGBE_TX_FLAGS_TSO |3831 IXGBE_TX_FLAGS_CSUM;3832 }3833 3834 /* determine offset of inner transport header */3835 l4_offset = l4.hdr - skb->data;3836 3837 /* compute length of segmentation header */3838 *hdr_len = (l4.tcp->doff * 4) + l4_offset;3839 3840 /* remove payload length from inner checksum */3841 paylen = skb->len - l4_offset;3842 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));3843 3844 /* update gso size and bytecount with header size */3845 first->gso_segs = skb_shinfo(skb)->gso_segs;3846 first->bytecount += (first->gso_segs - 1) * *hdr_len;3847 3848 /* mss_l4len_id: use 1 as index for TSO */3849 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;3850 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;3851 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);3852 3853 fceof_saidx |= itd->pfsa;3854 type_tucmd |= itd->flags | itd->trailer_len;3855 3856 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */3857 vlan_macip_lens = l4.hdr - ip.hdr;3858 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;3859 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;3860 3861 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,3862 mss_l4len_idx);3863 3864 return 1;3865}3866 3867static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,3868 struct ixgbevf_tx_buffer *first,3869 struct ixgbevf_ipsec_tx_data *itd)3870{3871 struct sk_buff *skb = first->skb;3872 u32 vlan_macip_lens = 0;3873 u32 fceof_saidx = 0;3874 u32 type_tucmd = 0;3875 3876 if (skb->ip_summed != CHECKSUM_PARTIAL)3877 goto no_csum;3878 3879 switch (skb->csum_offset) {3880 case offsetof(struct tcphdr, check):3881 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;3882 fallthrough;3883 case offsetof(struct udphdr, check):3884 break;3885 case offsetof(struct sctphdr, checksum):3886 /* validate that this is actually an SCTP request */3887 if (skb_csum_is_sctp(skb)) {3888 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;3889 break;3890 }3891 fallthrough;3892 default:3893 skb_checksum_help(skb);3894 goto no_csum;3895 }3896 3897 if (first->protocol == htons(ETH_P_IP))3898 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;3899 3900 /* update TX checksum flag */3901 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;3902 vlan_macip_lens = skb_checksum_start_offset(skb) -3903 skb_network_offset(skb);3904no_csum:3905 /* vlan_macip_lens: MACLEN, VLAN tag */3906 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;3907 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;3908 3909 fceof_saidx |= itd->pfsa;3910 type_tucmd |= itd->flags | itd->trailer_len;3911 3912 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,3913 fceof_saidx, type_tucmd, 0);3914}3915 3916static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)3917{3918 /* set type for advanced descriptor with frame checksum insertion */3919 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |3920 IXGBE_ADVTXD_DCMD_IFCS |3921 IXGBE_ADVTXD_DCMD_DEXT);3922 3923 /* set HW VLAN bit if VLAN is present */3924 if (tx_flags & IXGBE_TX_FLAGS_VLAN)3925 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);3926 3927 /* set segmentation enable bits for TSO/FSO */3928 if (tx_flags & IXGBE_TX_FLAGS_TSO)3929 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);3930 3931 return cmd_type;3932}3933 3934static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,3935 u32 tx_flags, unsigned int paylen)3936{3937 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);3938 3939 /* enable L4 checksum for TSO and TX checksum offload */3940 if (tx_flags & IXGBE_TX_FLAGS_CSUM)3941 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);3942 3943 /* enble IPv4 checksum for TSO */3944 if (tx_flags & IXGBE_TX_FLAGS_IPV4)3945 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);3946 3947 /* enable IPsec */3948 if (tx_flags & IXGBE_TX_FLAGS_IPSEC)3949 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);3950 3951 /* use index 1 context for TSO/FSO/FCOE/IPSEC */3952 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))3953 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);3954 3955 /* Check Context must be set if Tx switch is enabled, which it3956 * always is for case where virtual functions are running3957 */3958 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);3959 3960 tx_desc->read.olinfo_status = olinfo_status;3961}3962 3963static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,3964 struct ixgbevf_tx_buffer *first,3965 const u8 hdr_len)3966{3967 struct sk_buff *skb = first->skb;3968 struct ixgbevf_tx_buffer *tx_buffer;3969 union ixgbe_adv_tx_desc *tx_desc;3970 skb_frag_t *frag;3971 dma_addr_t dma;3972 unsigned int data_len, size;3973 u32 tx_flags = first->tx_flags;3974 __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);3975 u16 i = tx_ring->next_to_use;3976 3977 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);3978 3979 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);3980 3981 size = skb_headlen(skb);3982 data_len = skb->data_len;3983 3984 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);3985 3986 tx_buffer = first;3987 3988 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {3989 if (dma_mapping_error(tx_ring->dev, dma))3990 goto dma_error;3991 3992 /* record length, and DMA address */3993 dma_unmap_len_set(tx_buffer, len, size);3994 dma_unmap_addr_set(tx_buffer, dma, dma);3995 3996 tx_desc->read.buffer_addr = cpu_to_le64(dma);3997 3998 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {3999 tx_desc->read.cmd_type_len =4000 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);4001 4002 i++;4003 tx_desc++;4004 if (i == tx_ring->count) {4005 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);4006 i = 0;4007 }4008 tx_desc->read.olinfo_status = 0;4009 4010 dma += IXGBE_MAX_DATA_PER_TXD;4011 size -= IXGBE_MAX_DATA_PER_TXD;4012 4013 tx_desc->read.buffer_addr = cpu_to_le64(dma);4014 }4015 4016 if (likely(!data_len))4017 break;4018 4019 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);4020 4021 i++;4022 tx_desc++;4023 if (i == tx_ring->count) {4024 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);4025 i = 0;4026 }4027 tx_desc->read.olinfo_status = 0;4028 4029 size = skb_frag_size(frag);4030 data_len -= size;4031 4032 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,4033 DMA_TO_DEVICE);4034 4035 tx_buffer = &tx_ring->tx_buffer_info[i];4036 }4037 4038 /* write last descriptor with RS and EOP bits */4039 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);4040 tx_desc->read.cmd_type_len = cmd_type;4041 4042 /* set the timestamp */4043 first->time_stamp = jiffies;4044 4045 skb_tx_timestamp(skb);4046 4047 /* Force memory writes to complete before letting h/w know there4048 * are new descriptors to fetch. (Only applicable for weak-ordered4049 * memory model archs, such as IA-64).4050 *4051 * We also need this memory barrier (wmb) to make certain all of the4052 * status bits have been updated before next_to_watch is written.4053 */4054 wmb();4055 4056 /* set next_to_watch value indicating a packet is present */4057 first->next_to_watch = tx_desc;4058 4059 i++;4060 if (i == tx_ring->count)4061 i = 0;4062 4063 tx_ring->next_to_use = i;4064 4065 /* notify HW of packet */4066 ixgbevf_write_tail(tx_ring, i);4067 4068 return;4069dma_error:4070 dev_err(tx_ring->dev, "TX DMA map failed\n");4071 tx_buffer = &tx_ring->tx_buffer_info[i];4072 4073 /* clear dma mappings for failed tx_buffer_info map */4074 while (tx_buffer != first) {4075 if (dma_unmap_len(tx_buffer, len))4076 dma_unmap_page(tx_ring->dev,4077 dma_unmap_addr(tx_buffer, dma),4078 dma_unmap_len(tx_buffer, len),4079 DMA_TO_DEVICE);4080 dma_unmap_len_set(tx_buffer, len, 0);4081 4082 if (i-- == 0)4083 i += tx_ring->count;4084 tx_buffer = &tx_ring->tx_buffer_info[i];4085 }4086 4087 if (dma_unmap_len(tx_buffer, len))4088 dma_unmap_single(tx_ring->dev,4089 dma_unmap_addr(tx_buffer, dma),4090 dma_unmap_len(tx_buffer, len),4091 DMA_TO_DEVICE);4092 dma_unmap_len_set(tx_buffer, len, 0);4093 4094 dev_kfree_skb_any(tx_buffer->skb);4095 tx_buffer->skb = NULL;4096 4097 tx_ring->next_to_use = i;4098}4099 4100static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)4101{4102 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);4103 /* Herbert's original patch had:4104 * smp_mb__after_netif_stop_queue();4105 * but since that doesn't exist yet, just open code it.4106 */4107 smp_mb();4108 4109 /* We need to check again in a case another CPU has just4110 * made room available.4111 */4112 if (likely(ixgbevf_desc_unused(tx_ring) < size))4113 return -EBUSY;4114 4115 /* A reprieve! - use start_queue because it doesn't call schedule */4116 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);4117 ++tx_ring->tx_stats.restart_queue;4118 4119 return 0;4120}4121 4122static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)4123{4124 if (likely(ixgbevf_desc_unused(tx_ring) >= size))4125 return 0;4126 return __ixgbevf_maybe_stop_tx(tx_ring, size);4127}4128 4129static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,4130 struct ixgbevf_ring *tx_ring)4131{4132 struct ixgbevf_tx_buffer *first;4133 int tso;4134 u32 tx_flags = 0;4135 u16 count = TXD_USE_COUNT(skb_headlen(skb));4136 struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };4137#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD4138 unsigned short f;4139#endif4140 u8 hdr_len = 0;4141 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);4142 4143 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {4144 dev_kfree_skb_any(skb);4145 return NETDEV_TX_OK;4146 }4147 4148 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,4149 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,4150 * + 2 desc gap to keep tail from touching head,4151 * + 1 desc for context descriptor,4152 * otherwise try next time4153 */4154#if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD4155 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {4156 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];4157 4158 count += TXD_USE_COUNT(skb_frag_size(frag));4159 }4160#else4161 count += skb_shinfo(skb)->nr_frags;4162#endif4163 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {4164 tx_ring->tx_stats.tx_busy++;4165 return NETDEV_TX_BUSY;4166 }4167 4168 /* record the location of the first descriptor for this packet */4169 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];4170 first->skb = skb;4171 first->bytecount = skb->len;4172 first->gso_segs = 1;4173 4174 if (skb_vlan_tag_present(skb)) {4175 tx_flags |= skb_vlan_tag_get(skb);4176 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;4177 tx_flags |= IXGBE_TX_FLAGS_VLAN;4178 }4179 4180 /* record initial flags and protocol */4181 first->tx_flags = tx_flags;4182 first->protocol = vlan_get_protocol(skb);4183 4184#ifdef CONFIG_IXGBEVF_IPSEC4185 if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))4186 goto out_drop;4187#endif4188 tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);4189 if (tso < 0)4190 goto out_drop;4191 else if (!tso)4192 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);4193 4194 ixgbevf_tx_map(tx_ring, first, hdr_len);4195 4196 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);4197 4198 return NETDEV_TX_OK;4199 4200out_drop:4201 dev_kfree_skb_any(first->skb);4202 first->skb = NULL;4203 4204 return NETDEV_TX_OK;4205}4206 4207static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)4208{4209 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4210 struct ixgbevf_ring *tx_ring;4211 4212 if (skb->len <= 0) {4213 dev_kfree_skb_any(skb);4214 return NETDEV_TX_OK;4215 }4216 4217 /* The minimum packet size for olinfo paylen is 17 so pad the skb4218 * in order to meet this minimum size requirement.4219 */4220 if (skb->len < 17) {4221 if (skb_padto(skb, 17))4222 return NETDEV_TX_OK;4223 skb->len = 17;4224 }4225 4226 tx_ring = adapter->tx_ring[skb->queue_mapping];4227 return ixgbevf_xmit_frame_ring(skb, tx_ring);4228}4229 4230/**4231 * ixgbevf_set_mac - Change the Ethernet Address of the NIC4232 * @netdev: network interface device structure4233 * @p: pointer to an address structure4234 *4235 * Returns 0 on success, negative on failure4236 **/4237static int ixgbevf_set_mac(struct net_device *netdev, void *p)4238{4239 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4240 struct ixgbe_hw *hw = &adapter->hw;4241 struct sockaddr *addr = p;4242 int err;4243 4244 if (!is_valid_ether_addr(addr->sa_data))4245 return -EADDRNOTAVAIL;4246 4247 spin_lock_bh(&adapter->mbx_lock);4248 4249 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);4250 4251 spin_unlock_bh(&adapter->mbx_lock);4252 4253 if (err)4254 return -EPERM;4255 4256 ether_addr_copy(hw->mac.addr, addr->sa_data);4257 ether_addr_copy(hw->mac.perm_addr, addr->sa_data);4258 eth_hw_addr_set(netdev, addr->sa_data);4259 4260 return 0;4261}4262 4263/**4264 * ixgbevf_change_mtu - Change the Maximum Transfer Unit4265 * @netdev: network interface device structure4266 * @new_mtu: new value for maximum frame size4267 *4268 * Returns 0 on success, negative on failure4269 **/4270static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)4271{4272 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4273 struct ixgbe_hw *hw = &adapter->hw;4274 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;4275 int ret;4276 4277 /* prevent MTU being changed to a size unsupported by XDP */4278 if (adapter->xdp_prog) {4279 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");4280 return -EPERM;4281 }4282 4283 spin_lock_bh(&adapter->mbx_lock);4284 /* notify the PF of our intent to use this size of frame */4285 ret = hw->mac.ops.set_rlpml(hw, max_frame);4286 spin_unlock_bh(&adapter->mbx_lock);4287 if (ret)4288 return -EINVAL;4289 4290 hw_dbg(hw, "changing MTU from %d to %d\n",4291 netdev->mtu, new_mtu);4292 4293 /* must set new MTU before calling down or up */4294 WRITE_ONCE(netdev->mtu, new_mtu);4295 4296 if (netif_running(netdev))4297 ixgbevf_reinit_locked(adapter);4298 4299 return 0;4300}4301 4302static int ixgbevf_suspend(struct device *dev_d)4303{4304 struct net_device *netdev = dev_get_drvdata(dev_d);4305 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4306 4307 rtnl_lock();4308 netif_device_detach(netdev);4309 4310 if (netif_running(netdev))4311 ixgbevf_close_suspend(adapter);4312 4313 ixgbevf_clear_interrupt_scheme(adapter);4314 rtnl_unlock();4315 4316 return 0;4317}4318 4319static int ixgbevf_resume(struct device *dev_d)4320{4321 struct pci_dev *pdev = to_pci_dev(dev_d);4322 struct net_device *netdev = pci_get_drvdata(pdev);4323 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4324 u32 err;4325 4326 adapter->hw.hw_addr = adapter->io_addr;4327 smp_mb__before_atomic();4328 clear_bit(__IXGBEVF_DISABLED, &adapter->state);4329 pci_set_master(pdev);4330 4331 ixgbevf_reset(adapter);4332 4333 rtnl_lock();4334 err = ixgbevf_init_interrupt_scheme(adapter);4335 if (!err && netif_running(netdev))4336 err = ixgbevf_open(netdev);4337 rtnl_unlock();4338 if (err)4339 return err;4340 4341 netif_device_attach(netdev);4342 4343 return err;4344}4345 4346static void ixgbevf_shutdown(struct pci_dev *pdev)4347{4348 ixgbevf_suspend(&pdev->dev);4349}4350 4351static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,4352 const struct ixgbevf_ring *ring)4353{4354 u64 bytes, packets;4355 unsigned int start;4356 4357 if (ring) {4358 do {4359 start = u64_stats_fetch_begin(&ring->syncp);4360 bytes = ring->stats.bytes;4361 packets = ring->stats.packets;4362 } while (u64_stats_fetch_retry(&ring->syncp, start));4363 stats->tx_bytes += bytes;4364 stats->tx_packets += packets;4365 }4366}4367 4368static void ixgbevf_get_stats(struct net_device *netdev,4369 struct rtnl_link_stats64 *stats)4370{4371 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4372 unsigned int start;4373 u64 bytes, packets;4374 const struct ixgbevf_ring *ring;4375 int i;4376 4377 ixgbevf_update_stats(adapter);4378 4379 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;4380 4381 rcu_read_lock();4382 for (i = 0; i < adapter->num_rx_queues; i++) {4383 ring = adapter->rx_ring[i];4384 do {4385 start = u64_stats_fetch_begin(&ring->syncp);4386 bytes = ring->stats.bytes;4387 packets = ring->stats.packets;4388 } while (u64_stats_fetch_retry(&ring->syncp, start));4389 stats->rx_bytes += bytes;4390 stats->rx_packets += packets;4391 }4392 4393 for (i = 0; i < adapter->num_tx_queues; i++) {4394 ring = adapter->tx_ring[i];4395 ixgbevf_get_tx_ring_stats(stats, ring);4396 }4397 4398 for (i = 0; i < adapter->num_xdp_queues; i++) {4399 ring = adapter->xdp_ring[i];4400 ixgbevf_get_tx_ring_stats(stats, ring);4401 }4402 rcu_read_unlock();4403}4404 4405#define IXGBEVF_MAX_MAC_HDR_LEN 1274406#define IXGBEVF_MAX_NETWORK_HDR_LEN 5114407 4408static netdev_features_t4409ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,4410 netdev_features_t features)4411{4412 unsigned int network_hdr_len, mac_hdr_len;4413 4414 /* Make certain the headers can be described by a context descriptor */4415 mac_hdr_len = skb_network_offset(skb);4416 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))4417 return features & ~(NETIF_F_HW_CSUM |4418 NETIF_F_SCTP_CRC |4419 NETIF_F_HW_VLAN_CTAG_TX |4420 NETIF_F_TSO |4421 NETIF_F_TSO6);4422 4423 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);4424 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))4425 return features & ~(NETIF_F_HW_CSUM |4426 NETIF_F_SCTP_CRC |4427 NETIF_F_TSO |4428 NETIF_F_TSO6);4429 4430 /* We can only support IPV4 TSO in tunnels if we can mangle the4431 * inner IP ID field, so strip TSO if MANGLEID is not supported.4432 */4433 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))4434 features &= ~NETIF_F_TSO;4435 4436 return features;4437}4438 4439static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)4440{4441 int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;4442 struct ixgbevf_adapter *adapter = netdev_priv(dev);4443 struct bpf_prog *old_prog;4444 4445 /* verify ixgbevf ring attributes are sufficient for XDP */4446 for (i = 0; i < adapter->num_rx_queues; i++) {4447 struct ixgbevf_ring *ring = adapter->rx_ring[i];4448 4449 if (frame_size > ixgbevf_rx_bufsz(ring))4450 return -EINVAL;4451 }4452 4453 old_prog = xchg(&adapter->xdp_prog, prog);4454 4455 /* If transitioning XDP modes reconfigure rings */4456 if (!!prog != !!old_prog) {4457 /* Hardware has to reinitialize queues and interrupts to4458 * match packet buffer alignment. Unfortunately, the4459 * hardware is not flexible enough to do this dynamically.4460 */4461 if (netif_running(dev))4462 ixgbevf_close(dev);4463 4464 ixgbevf_clear_interrupt_scheme(adapter);4465 ixgbevf_init_interrupt_scheme(adapter);4466 4467 if (netif_running(dev))4468 ixgbevf_open(dev);4469 } else {4470 for (i = 0; i < adapter->num_rx_queues; i++)4471 xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);4472 }4473 4474 if (old_prog)4475 bpf_prog_put(old_prog);4476 4477 return 0;4478}4479 4480static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)4481{4482 switch (xdp->command) {4483 case XDP_SETUP_PROG:4484 return ixgbevf_xdp_setup(dev, xdp->prog);4485 default:4486 return -EINVAL;4487 }4488}4489 4490static const struct net_device_ops ixgbevf_netdev_ops = {4491 .ndo_open = ixgbevf_open,4492 .ndo_stop = ixgbevf_close,4493 .ndo_start_xmit = ixgbevf_xmit_frame,4494 .ndo_set_rx_mode = ixgbevf_set_rx_mode,4495 .ndo_get_stats64 = ixgbevf_get_stats,4496 .ndo_validate_addr = eth_validate_addr,4497 .ndo_set_mac_address = ixgbevf_set_mac,4498 .ndo_change_mtu = ixgbevf_change_mtu,4499 .ndo_tx_timeout = ixgbevf_tx_timeout,4500 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,4501 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,4502 .ndo_features_check = ixgbevf_features_check,4503 .ndo_bpf = ixgbevf_xdp,4504};4505 4506static void ixgbevf_assign_netdev_ops(struct net_device *dev)4507{4508 dev->netdev_ops = &ixgbevf_netdev_ops;4509 ixgbevf_set_ethtool_ops(dev);4510 dev->watchdog_timeo = 5 * HZ;4511}4512 4513/**4514 * ixgbevf_probe - Device Initialization Routine4515 * @pdev: PCI device information struct4516 * @ent: entry in ixgbevf_pci_tbl4517 *4518 * Returns 0 on success, negative on failure4519 *4520 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.4521 * The OS initialization, configuring of the adapter private structure,4522 * and a hardware reset occur.4523 **/4524static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)4525{4526 struct net_device *netdev;4527 struct ixgbevf_adapter *adapter = NULL;4528 struct ixgbe_hw *hw = NULL;4529 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];4530 bool disable_dev = false;4531 int err;4532 4533 err = pci_enable_device(pdev);4534 if (err)4535 return err;4536 4537 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));4538 if (err) {4539 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");4540 goto err_dma;4541 }4542 4543 err = pci_request_regions(pdev, ixgbevf_driver_name);4544 if (err) {4545 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);4546 goto err_pci_reg;4547 }4548 4549 pci_set_master(pdev);4550 4551 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),4552 MAX_TX_QUEUES);4553 if (!netdev) {4554 err = -ENOMEM;4555 goto err_alloc_etherdev;4556 }4557 4558 SET_NETDEV_DEV(netdev, &pdev->dev);4559 4560 adapter = netdev_priv(netdev);4561 4562 adapter->netdev = netdev;4563 adapter->pdev = pdev;4564 hw = &adapter->hw;4565 hw->back = adapter;4566 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);4567 4568 /* call save state here in standalone driver because it relies on4569 * adapter struct to exist, and needs to call netdev_priv4570 */4571 pci_save_state(pdev);4572 4573 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),4574 pci_resource_len(pdev, 0));4575 adapter->io_addr = hw->hw_addr;4576 if (!hw->hw_addr) {4577 err = -EIO;4578 goto err_ioremap;4579 }4580 4581 ixgbevf_assign_netdev_ops(netdev);4582 4583 /* Setup HW API */4584 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));4585 hw->mac.type = ii->mac;4586 4587 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,4588 sizeof(struct ixgbe_mbx_operations));4589 4590 /* setup the private structure */4591 err = ixgbevf_sw_init(adapter);4592 if (err)4593 goto err_sw_init;4594 4595 /* The HW MAC address was set and/or determined in sw_init */4596 if (!is_valid_ether_addr(netdev->dev_addr)) {4597 pr_err("invalid MAC address\n");4598 err = -EIO;4599 goto err_sw_init;4600 }4601 4602 netdev->hw_features = NETIF_F_SG |4603 NETIF_F_TSO |4604 NETIF_F_TSO6 |4605 NETIF_F_RXCSUM |4606 NETIF_F_HW_CSUM |4607 NETIF_F_SCTP_CRC;4608 4609#define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \4610 NETIF_F_GSO_GRE_CSUM | \4611 NETIF_F_GSO_IPXIP4 | \4612 NETIF_F_GSO_IPXIP6 | \4613 NETIF_F_GSO_UDP_TUNNEL | \4614 NETIF_F_GSO_UDP_TUNNEL_CSUM)4615 4616 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;4617 netdev->hw_features |= NETIF_F_GSO_PARTIAL |4618 IXGBEVF_GSO_PARTIAL_FEATURES;4619 4620 netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;4621 4622 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;4623 netdev->mpls_features |= NETIF_F_SG |4624 NETIF_F_TSO |4625 NETIF_F_TSO6 |4626 NETIF_F_HW_CSUM;4627 netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;4628 netdev->hw_enc_features |= netdev->vlan_features;4629 4630 /* set this bit last since it cannot be part of vlan_features */4631 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |4632 NETIF_F_HW_VLAN_CTAG_RX |4633 NETIF_F_HW_VLAN_CTAG_TX;4634 4635 netdev->priv_flags |= IFF_UNICAST_FLT;4636 netdev->xdp_features = NETDEV_XDP_ACT_BASIC;4637 4638 /* MTU range: 68 - 1504 or 9710 */4639 netdev->min_mtu = ETH_MIN_MTU;4640 switch (adapter->hw.api_version) {4641 case ixgbe_mbox_api_11:4642 case ixgbe_mbox_api_12:4643 case ixgbe_mbox_api_13:4644 case ixgbe_mbox_api_14:4645 case ixgbe_mbox_api_15:4646 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -4647 (ETH_HLEN + ETH_FCS_LEN);4648 break;4649 default:4650 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)4651 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -4652 (ETH_HLEN + ETH_FCS_LEN);4653 else4654 netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;4655 break;4656 }4657 4658 if (IXGBE_REMOVED(hw->hw_addr)) {4659 err = -EIO;4660 goto err_sw_init;4661 }4662 4663 timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);4664 4665 INIT_WORK(&adapter->service_task, ixgbevf_service_task);4666 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);4667 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);4668 4669 err = ixgbevf_init_interrupt_scheme(adapter);4670 if (err)4671 goto err_sw_init;4672 4673 strcpy(netdev->name, "eth%d");4674 4675 err = register_netdev(netdev);4676 if (err)4677 goto err_register;4678 4679 pci_set_drvdata(pdev, netdev);4680 netif_carrier_off(netdev);4681 ixgbevf_init_ipsec_offload(adapter);4682 4683 ixgbevf_init_last_counter_stats(adapter);4684 4685 /* print the VF info */4686 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);4687 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);4688 4689 switch (hw->mac.type) {4690 case ixgbe_mac_X550_vf:4691 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");4692 break;4693 case ixgbe_mac_X540_vf:4694 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");4695 break;4696 case ixgbe_mac_82599_vf:4697 default:4698 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");4699 break;4700 }4701 4702 return 0;4703 4704err_register:4705 ixgbevf_clear_interrupt_scheme(adapter);4706err_sw_init:4707 ixgbevf_reset_interrupt_capability(adapter);4708 iounmap(adapter->io_addr);4709 kfree(adapter->rss_key);4710err_ioremap:4711 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);4712 free_netdev(netdev);4713err_alloc_etherdev:4714 pci_release_regions(pdev);4715err_pci_reg:4716err_dma:4717 if (!adapter || disable_dev)4718 pci_disable_device(pdev);4719 return err;4720}4721 4722/**4723 * ixgbevf_remove - Device Removal Routine4724 * @pdev: PCI device information struct4725 *4726 * ixgbevf_remove is called by the PCI subsystem to alert the driver4727 * that it should release a PCI device. The could be caused by a4728 * Hot-Plug event, or because the driver is going to be removed from4729 * memory.4730 **/4731static void ixgbevf_remove(struct pci_dev *pdev)4732{4733 struct net_device *netdev = pci_get_drvdata(pdev);4734 struct ixgbevf_adapter *adapter;4735 bool disable_dev;4736 4737 if (!netdev)4738 return;4739 4740 adapter = netdev_priv(netdev);4741 4742 set_bit(__IXGBEVF_REMOVING, &adapter->state);4743 cancel_work_sync(&adapter->service_task);4744 4745 if (netdev->reg_state == NETREG_REGISTERED)4746 unregister_netdev(netdev);4747 4748 ixgbevf_stop_ipsec_offload(adapter);4749 ixgbevf_clear_interrupt_scheme(adapter);4750 ixgbevf_reset_interrupt_capability(adapter);4751 4752 iounmap(adapter->io_addr);4753 pci_release_regions(pdev);4754 4755 hw_dbg(&adapter->hw, "Remove complete\n");4756 4757 kfree(adapter->rss_key);4758 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);4759 free_netdev(netdev);4760 4761 if (disable_dev)4762 pci_disable_device(pdev);4763}4764 4765/**4766 * ixgbevf_io_error_detected - called when PCI error is detected4767 * @pdev: Pointer to PCI device4768 * @state: The current pci connection state4769 *4770 * This function is called after a PCI bus error affecting4771 * this device has been detected.4772 **/4773static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,4774 pci_channel_state_t state)4775{4776 struct net_device *netdev = pci_get_drvdata(pdev);4777 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4778 4779 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))4780 return PCI_ERS_RESULT_DISCONNECT;4781 4782 rtnl_lock();4783 netif_device_detach(netdev);4784 4785 if (netif_running(netdev))4786 ixgbevf_close_suspend(adapter);4787 4788 if (state == pci_channel_io_perm_failure) {4789 rtnl_unlock();4790 return PCI_ERS_RESULT_DISCONNECT;4791 }4792 4793 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))4794 pci_disable_device(pdev);4795 rtnl_unlock();4796 4797 /* Request a slot reset. */4798 return PCI_ERS_RESULT_NEED_RESET;4799}4800 4801/**4802 * ixgbevf_io_slot_reset - called after the pci bus has been reset.4803 * @pdev: Pointer to PCI device4804 *4805 * Restart the card from scratch, as if from a cold-boot. Implementation4806 * resembles the first-half of the ixgbevf_resume routine.4807 **/4808static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)4809{4810 struct net_device *netdev = pci_get_drvdata(pdev);4811 struct ixgbevf_adapter *adapter = netdev_priv(netdev);4812 4813 if (pci_enable_device_mem(pdev)) {4814 dev_err(&pdev->dev,4815 "Cannot re-enable PCI device after reset.\n");4816 return PCI_ERS_RESULT_DISCONNECT;4817 }4818 4819 adapter->hw.hw_addr = adapter->io_addr;4820 smp_mb__before_atomic();4821 clear_bit(__IXGBEVF_DISABLED, &adapter->state);4822 pci_set_master(pdev);4823 4824 ixgbevf_reset(adapter);4825 4826 return PCI_ERS_RESULT_RECOVERED;4827}4828 4829/**4830 * ixgbevf_io_resume - called when traffic can start flowing again.4831 * @pdev: Pointer to PCI device4832 *4833 * This callback is called when the error recovery driver tells us that4834 * its OK to resume normal operation. Implementation resembles the4835 * second-half of the ixgbevf_resume routine.4836 **/4837static void ixgbevf_io_resume(struct pci_dev *pdev)4838{4839 struct net_device *netdev = pci_get_drvdata(pdev);4840 4841 rtnl_lock();4842 if (netif_running(netdev))4843 ixgbevf_open(netdev);4844 4845 netif_device_attach(netdev);4846 rtnl_unlock();4847}4848 4849/* PCI Error Recovery (ERS) */4850static const struct pci_error_handlers ixgbevf_err_handler = {4851 .error_detected = ixgbevf_io_error_detected,4852 .slot_reset = ixgbevf_io_slot_reset,4853 .resume = ixgbevf_io_resume,4854};4855 4856static DEFINE_SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume);4857 4858static struct pci_driver ixgbevf_driver = {4859 .name = ixgbevf_driver_name,4860 .id_table = ixgbevf_pci_tbl,4861 .probe = ixgbevf_probe,4862 .remove = ixgbevf_remove,4863 4864 /* Power Management Hooks */4865 .driver.pm = pm_sleep_ptr(&ixgbevf_pm_ops),4866 4867 .shutdown = ixgbevf_shutdown,4868 .err_handler = &ixgbevf_err_handler4869};4870 4871/**4872 * ixgbevf_init_module - Driver Registration Routine4873 *4874 * ixgbevf_init_module is the first routine called when the driver is4875 * loaded. All it does is register with the PCI subsystem.4876 **/4877static int __init ixgbevf_init_module(void)4878{4879 int err;4880 4881 pr_info("%s\n", ixgbevf_driver_string);4882 pr_info("%s\n", ixgbevf_copyright);4883 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);4884 if (!ixgbevf_wq) {4885 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);4886 return -ENOMEM;4887 }4888 4889 err = pci_register_driver(&ixgbevf_driver);4890 if (err) {4891 destroy_workqueue(ixgbevf_wq);4892 return err;4893 }4894 4895 return 0;4896}4897 4898module_init(ixgbevf_init_module);4899 4900/**4901 * ixgbevf_exit_module - Driver Exit Cleanup Routine4902 *4903 * ixgbevf_exit_module is called just before the driver is removed4904 * from memory.4905 **/4906static void __exit ixgbevf_exit_module(void)4907{4908 pci_unregister_driver(&ixgbevf_driver);4909 if (ixgbevf_wq) {4910 destroy_workqueue(ixgbevf_wq);4911 ixgbevf_wq = NULL;4912 }4913}4914 4915#ifdef DEBUG4916/**4917 * ixgbevf_get_hw_dev_name - return device name string4918 * used by hardware layer to print debugging information4919 * @hw: pointer to private hardware struct4920 **/4921char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)4922{4923 struct ixgbevf_adapter *adapter = hw->back;4924 4925 return adapter->netdev->name;4926}4927 4928#endif4929module_exit(ixgbevf_exit_module);4930 4931/* ixgbevf_main.c */4932